Commit | Line | Data |
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043405e1 CO |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * derived from drivers/kvm/kvm_main.c | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
4d5c5d0f BAY |
7 | * Copyright (C) 2008 Qumranet, Inc. |
8 | * Copyright IBM Corporation, 2008 | |
9611c187 | 9 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
043405e1 CO |
10 | * |
11 | * Authors: | |
12 | * Avi Kivity <avi@qumranet.com> | |
13 | * Yaniv Kamay <yaniv@qumranet.com> | |
4d5c5d0f BAY |
14 | * Amit Shah <amit.shah@qumranet.com> |
15 | * Ben-Ami Yassour <benami@il.ibm.com> | |
043405e1 CO |
16 | * |
17 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
18 | * the COPYING file in the top-level directory. | |
19 | * | |
20 | */ | |
21 | ||
edf88417 | 22 | #include <linux/kvm_host.h> |
313a3dc7 | 23 | #include "irq.h" |
1d737c8a | 24 | #include "mmu.h" |
7837699f | 25 | #include "i8254.h" |
37817f29 | 26 | #include "tss.h" |
5fdbf976 | 27 | #include "kvm_cache_regs.h" |
26eef70c | 28 | #include "x86.h" |
00b27a3e | 29 | #include "cpuid.h" |
c9eab58f | 30 | #include "assigned-dev.h" |
474a5bb9 | 31 | #include "pmu.h" |
e83d5887 | 32 | #include "hyperv.h" |
313a3dc7 | 33 | |
18068523 | 34 | #include <linux/clocksource.h> |
4d5c5d0f | 35 | #include <linux/interrupt.h> |
313a3dc7 CO |
36 | #include <linux/kvm.h> |
37 | #include <linux/fs.h> | |
38 | #include <linux/vmalloc.h> | |
5fb76f9b | 39 | #include <linux/module.h> |
0de10343 | 40 | #include <linux/mman.h> |
2bacc55c | 41 | #include <linux/highmem.h> |
19de40a8 | 42 | #include <linux/iommu.h> |
62c476c7 | 43 | #include <linux/intel-iommu.h> |
c8076604 | 44 | #include <linux/cpufreq.h> |
18863bdd | 45 | #include <linux/user-return-notifier.h> |
a983fb23 | 46 | #include <linux/srcu.h> |
5a0e3ad6 | 47 | #include <linux/slab.h> |
ff9d07a0 | 48 | #include <linux/perf_event.h> |
7bee342a | 49 | #include <linux/uaccess.h> |
af585b92 | 50 | #include <linux/hash.h> |
a1b60c1c | 51 | #include <linux/pci.h> |
16e8d74d MT |
52 | #include <linux/timekeeper_internal.h> |
53 | #include <linux/pvclock_gtod.h> | |
87276880 FW |
54 | #include <linux/kvm_irqfd.h> |
55 | #include <linux/irqbypass.h> | |
aec51dc4 | 56 | #include <trace/events/kvm.h> |
2ed152af | 57 | |
229456fc MT |
58 | #define CREATE_TRACE_POINTS |
59 | #include "trace.h" | |
043405e1 | 60 | |
24f1e32c | 61 | #include <asm/debugreg.h> |
d825ed0a | 62 | #include <asm/msr.h> |
a5f61300 | 63 | #include <asm/desc.h> |
890ca9ae | 64 | #include <asm/mce.h> |
f89e32e0 | 65 | #include <linux/kernel_stat.h> |
78f7f1e5 | 66 | #include <asm/fpu/internal.h> /* Ugh! */ |
1d5f066e | 67 | #include <asm/pvclock.h> |
217fc9cf | 68 | #include <asm/div64.h> |
efc64404 | 69 | #include <asm/irq_remapping.h> |
043405e1 | 70 | |
313a3dc7 | 71 | #define MAX_IO_MSRS 256 |
890ca9ae | 72 | #define KVM_MAX_MCE_BANKS 32 |
5854dbca | 73 | #define KVM_MCE_CAP_SUPPORTED (MCG_CTL_P | MCG_SER_P) |
890ca9ae | 74 | |
0f65dd70 AK |
75 | #define emul_to_vcpu(ctxt) \ |
76 | container_of(ctxt, struct kvm_vcpu, arch.emulate_ctxt) | |
77 | ||
50a37eb4 JR |
78 | /* EFER defaults: |
79 | * - enable syscall per default because its emulated by KVM | |
80 | * - enable LME and LMA per default on 64 bit KVM | |
81 | */ | |
82 | #ifdef CONFIG_X86_64 | |
1260edbe LJ |
83 | static |
84 | u64 __read_mostly efer_reserved_bits = ~((u64)(EFER_SCE | EFER_LME | EFER_LMA)); | |
50a37eb4 | 85 | #else |
1260edbe | 86 | static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE); |
50a37eb4 | 87 | #endif |
313a3dc7 | 88 | |
ba1389b7 AK |
89 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
90 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 91 | |
cb142eb7 | 92 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
7460fb4a | 93 | static void process_nmi(struct kvm_vcpu *vcpu); |
6addfc42 | 94 | static void __kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); |
674eea0f | 95 | |
893590c7 | 96 | struct kvm_x86_ops *kvm_x86_ops __read_mostly; |
5fdbf976 | 97 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 98 | |
893590c7 | 99 | static bool __read_mostly ignore_msrs = 0; |
476bc001 | 100 | module_param(ignore_msrs, bool, S_IRUGO | S_IWUSR); |
ed85c068 | 101 | |
9ed96e87 MT |
102 | unsigned int min_timer_period_us = 500; |
103 | module_param(min_timer_period_us, uint, S_IRUGO | S_IWUSR); | |
104 | ||
630994b3 MT |
105 | static bool __read_mostly kvmclock_periodic_sync = true; |
106 | module_param(kvmclock_periodic_sync, bool, S_IRUGO); | |
107 | ||
893590c7 | 108 | bool __read_mostly kvm_has_tsc_control; |
92a1f12d | 109 | EXPORT_SYMBOL_GPL(kvm_has_tsc_control); |
893590c7 | 110 | u32 __read_mostly kvm_max_guest_tsc_khz; |
92a1f12d | 111 | EXPORT_SYMBOL_GPL(kvm_max_guest_tsc_khz); |
bc9b961b HZ |
112 | u8 __read_mostly kvm_tsc_scaling_ratio_frac_bits; |
113 | EXPORT_SYMBOL_GPL(kvm_tsc_scaling_ratio_frac_bits); | |
114 | u64 __read_mostly kvm_max_tsc_scaling_ratio; | |
115 | EXPORT_SYMBOL_GPL(kvm_max_tsc_scaling_ratio); | |
ad721883 | 116 | static u64 __read_mostly kvm_default_tsc_scaling_ratio; |
92a1f12d | 117 | |
cc578287 | 118 | /* tsc tolerance in parts per million - default to 1/2 of the NTP threshold */ |
893590c7 | 119 | static u32 __read_mostly tsc_tolerance_ppm = 250; |
cc578287 ZA |
120 | module_param(tsc_tolerance_ppm, uint, S_IRUGO | S_IWUSR); |
121 | ||
d0659d94 | 122 | /* lapic timer advance (tscdeadline mode only) in nanoseconds */ |
893590c7 | 123 | unsigned int __read_mostly lapic_timer_advance_ns = 0; |
d0659d94 MT |
124 | module_param(lapic_timer_advance_ns, uint, S_IRUGO | S_IWUSR); |
125 | ||
52004014 FW |
126 | static bool __read_mostly vector_hashing = true; |
127 | module_param(vector_hashing, bool, S_IRUGO); | |
128 | ||
893590c7 | 129 | static bool __read_mostly backwards_tsc_observed = false; |
16a96021 | 130 | |
18863bdd AK |
131 | #define KVM_NR_SHARED_MSRS 16 |
132 | ||
133 | struct kvm_shared_msrs_global { | |
134 | int nr; | |
2bf78fa7 | 135 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
136 | }; |
137 | ||
138 | struct kvm_shared_msrs { | |
139 | struct user_return_notifier urn; | |
140 | bool registered; | |
2bf78fa7 SY |
141 | struct kvm_shared_msr_values { |
142 | u64 host; | |
143 | u64 curr; | |
144 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
145 | }; |
146 | ||
147 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
013f6a5d | 148 | static struct kvm_shared_msrs __percpu *shared_msrs; |
18863bdd | 149 | |
417bc304 | 150 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
151 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
152 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
153 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
154 | { "invlpg", VCPU_STAT(invlpg) }, | |
155 | { "exits", VCPU_STAT(exits) }, | |
156 | { "io_exits", VCPU_STAT(io_exits) }, | |
157 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
158 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
159 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 160 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 | 161 | { "halt_exits", VCPU_STAT(halt_exits) }, |
f7819512 | 162 | { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, |
62bea5bf | 163 | { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) }, |
3491caf2 | 164 | { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) }, |
ba1389b7 | 165 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f11c3a8d | 166 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
167 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
168 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
169 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
170 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
171 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
172 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
173 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 174 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 175 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
176 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
177 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
178 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
179 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
180 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
181 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 182 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 183 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 184 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 185 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
186 | { NULL } |
187 | }; | |
188 | ||
2acf923e DC |
189 | u64 __read_mostly host_xcr0; |
190 | ||
b6785def | 191 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt); |
d6aa1000 | 192 | |
af585b92 GN |
193 | static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu) |
194 | { | |
195 | int i; | |
196 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU); i++) | |
197 | vcpu->arch.apf.gfns[i] = ~0; | |
198 | } | |
199 | ||
18863bdd AK |
200 | static void kvm_on_user_return(struct user_return_notifier *urn) |
201 | { | |
202 | unsigned slot; | |
18863bdd AK |
203 | struct kvm_shared_msrs *locals |
204 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 205 | struct kvm_shared_msr_values *values; |
18863bdd AK |
206 | |
207 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { | |
2bf78fa7 SY |
208 | values = &locals->values[slot]; |
209 | if (values->host != values->curr) { | |
210 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
211 | values->curr = values->host; | |
18863bdd AK |
212 | } |
213 | } | |
214 | locals->registered = false; | |
215 | user_return_notifier_unregister(urn); | |
216 | } | |
217 | ||
2bf78fa7 | 218 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 219 | { |
18863bdd | 220 | u64 value; |
013f6a5d MT |
221 | unsigned int cpu = smp_processor_id(); |
222 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
18863bdd | 223 | |
2bf78fa7 SY |
224 | /* only read, and nobody should modify it at this time, |
225 | * so don't need lock */ | |
226 | if (slot >= shared_msrs_global.nr) { | |
227 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
228 | return; | |
229 | } | |
230 | rdmsrl_safe(msr, &value); | |
231 | smsr->values[slot].host = value; | |
232 | smsr->values[slot].curr = value; | |
233 | } | |
234 | ||
235 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
236 | { | |
0123be42 | 237 | BUG_ON(slot >= KVM_NR_SHARED_MSRS); |
c847fe88 | 238 | shared_msrs_global.msrs[slot] = msr; |
18863bdd AK |
239 | if (slot >= shared_msrs_global.nr) |
240 | shared_msrs_global.nr = slot + 1; | |
18863bdd AK |
241 | } |
242 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
243 | ||
244 | static void kvm_shared_msr_cpu_online(void) | |
245 | { | |
246 | unsigned i; | |
18863bdd AK |
247 | |
248 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 249 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
250 | } |
251 | ||
8b3c3104 | 252 | int kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd | 253 | { |
013f6a5d MT |
254 | unsigned int cpu = smp_processor_id(); |
255 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
8b3c3104 | 256 | int err; |
18863bdd | 257 | |
2bf78fa7 | 258 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
8b3c3104 | 259 | return 0; |
2bf78fa7 | 260 | smsr->values[slot].curr = value; |
8b3c3104 AH |
261 | err = wrmsrl_safe(shared_msrs_global.msrs[slot], value); |
262 | if (err) | |
263 | return 1; | |
264 | ||
18863bdd AK |
265 | if (!smsr->registered) { |
266 | smsr->urn.on_user_return = kvm_on_user_return; | |
267 | user_return_notifier_register(&smsr->urn); | |
268 | smsr->registered = true; | |
269 | } | |
8b3c3104 | 270 | return 0; |
18863bdd AK |
271 | } |
272 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
273 | ||
13a34e06 | 274 | static void drop_user_return_notifiers(void) |
3548bab5 | 275 | { |
013f6a5d MT |
276 | unsigned int cpu = smp_processor_id(); |
277 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
3548bab5 AK |
278 | |
279 | if (smsr->registered) | |
280 | kvm_on_user_return(&smsr->urn); | |
281 | } | |
282 | ||
6866b83e CO |
283 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
284 | { | |
8a5a87d9 | 285 | return vcpu->arch.apic_base; |
6866b83e CO |
286 | } |
287 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
288 | ||
58cb628d JK |
289 | int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
290 | { | |
291 | u64 old_state = vcpu->arch.apic_base & | |
292 | (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); | |
293 | u64 new_state = msr_info->data & | |
294 | (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); | |
295 | u64 reserved_bits = ((~0ULL) << cpuid_maxphyaddr(vcpu)) | | |
296 | 0x2ff | (guest_cpuid_has_x2apic(vcpu) ? 0 : X2APIC_ENABLE); | |
297 | ||
298 | if (!msr_info->host_initiated && | |
299 | ((msr_info->data & reserved_bits) != 0 || | |
300 | new_state == X2APIC_ENABLE || | |
301 | (new_state == MSR_IA32_APICBASE_ENABLE && | |
302 | old_state == (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE)) || | |
303 | (new_state == (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE) && | |
304 | old_state == 0))) | |
305 | return 1; | |
306 | ||
307 | kvm_lapic_set_base(vcpu, msr_info->data); | |
308 | return 0; | |
6866b83e CO |
309 | } |
310 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
311 | ||
2605fc21 | 312 | asmlinkage __visible void kvm_spurious_fault(void) |
e3ba45b8 GL |
313 | { |
314 | /* Fault while not rebooting. We want the trace. */ | |
315 | BUG(); | |
316 | } | |
317 | EXPORT_SYMBOL_GPL(kvm_spurious_fault); | |
318 | ||
3fd28fce ED |
319 | #define EXCPT_BENIGN 0 |
320 | #define EXCPT_CONTRIBUTORY 1 | |
321 | #define EXCPT_PF 2 | |
322 | ||
323 | static int exception_class(int vector) | |
324 | { | |
325 | switch (vector) { | |
326 | case PF_VECTOR: | |
327 | return EXCPT_PF; | |
328 | case DE_VECTOR: | |
329 | case TS_VECTOR: | |
330 | case NP_VECTOR: | |
331 | case SS_VECTOR: | |
332 | case GP_VECTOR: | |
333 | return EXCPT_CONTRIBUTORY; | |
334 | default: | |
335 | break; | |
336 | } | |
337 | return EXCPT_BENIGN; | |
338 | } | |
339 | ||
d6e8c854 NA |
340 | #define EXCPT_FAULT 0 |
341 | #define EXCPT_TRAP 1 | |
342 | #define EXCPT_ABORT 2 | |
343 | #define EXCPT_INTERRUPT 3 | |
344 | ||
345 | static int exception_type(int vector) | |
346 | { | |
347 | unsigned int mask; | |
348 | ||
349 | if (WARN_ON(vector > 31 || vector == NMI_VECTOR)) | |
350 | return EXCPT_INTERRUPT; | |
351 | ||
352 | mask = 1 << vector; | |
353 | ||
354 | /* #DB is trap, as instruction watchpoints are handled elsewhere */ | |
355 | if (mask & ((1 << DB_VECTOR) | (1 << BP_VECTOR) | (1 << OF_VECTOR))) | |
356 | return EXCPT_TRAP; | |
357 | ||
358 | if (mask & ((1 << DF_VECTOR) | (1 << MC_VECTOR))) | |
359 | return EXCPT_ABORT; | |
360 | ||
361 | /* Reserved exceptions will result in fault */ | |
362 | return EXCPT_FAULT; | |
363 | } | |
364 | ||
3fd28fce | 365 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, |
ce7ddec4 JR |
366 | unsigned nr, bool has_error, u32 error_code, |
367 | bool reinject) | |
3fd28fce ED |
368 | { |
369 | u32 prev_nr; | |
370 | int class1, class2; | |
371 | ||
3842d135 AK |
372 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
373 | ||
3fd28fce ED |
374 | if (!vcpu->arch.exception.pending) { |
375 | queue: | |
3ffb2468 NA |
376 | if (has_error && !is_protmode(vcpu)) |
377 | has_error = false; | |
3fd28fce ED |
378 | vcpu->arch.exception.pending = true; |
379 | vcpu->arch.exception.has_error_code = has_error; | |
380 | vcpu->arch.exception.nr = nr; | |
381 | vcpu->arch.exception.error_code = error_code; | |
3f0fd292 | 382 | vcpu->arch.exception.reinject = reinject; |
3fd28fce ED |
383 | return; |
384 | } | |
385 | ||
386 | /* to check exception */ | |
387 | prev_nr = vcpu->arch.exception.nr; | |
388 | if (prev_nr == DF_VECTOR) { | |
389 | /* triple fault -> shutdown */ | |
a8eeb04a | 390 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
3fd28fce ED |
391 | return; |
392 | } | |
393 | class1 = exception_class(prev_nr); | |
394 | class2 = exception_class(nr); | |
395 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
396 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
397 | /* generate double fault per SDM Table 5-5 */ | |
398 | vcpu->arch.exception.pending = true; | |
399 | vcpu->arch.exception.has_error_code = true; | |
400 | vcpu->arch.exception.nr = DF_VECTOR; | |
401 | vcpu->arch.exception.error_code = 0; | |
402 | } else | |
403 | /* replace previous exception with a new one in a hope | |
404 | that instruction re-execution will regenerate lost | |
405 | exception */ | |
406 | goto queue; | |
407 | } | |
408 | ||
298101da AK |
409 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
410 | { | |
ce7ddec4 | 411 | kvm_multiple_exception(vcpu, nr, false, 0, false); |
298101da AK |
412 | } |
413 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
414 | ||
ce7ddec4 JR |
415 | void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
416 | { | |
417 | kvm_multiple_exception(vcpu, nr, false, 0, true); | |
418 | } | |
419 | EXPORT_SYMBOL_GPL(kvm_requeue_exception); | |
420 | ||
db8fcefa | 421 | void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err) |
c3c91fee | 422 | { |
db8fcefa AP |
423 | if (err) |
424 | kvm_inject_gp(vcpu, 0); | |
425 | else | |
426 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
427 | } | |
428 | EXPORT_SYMBOL_GPL(kvm_complete_insn_gp); | |
8df25a32 | 429 | |
6389ee94 | 430 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
c3c91fee AK |
431 | { |
432 | ++vcpu->stat.pf_guest; | |
6389ee94 AK |
433 | vcpu->arch.cr2 = fault->address; |
434 | kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code); | |
c3c91fee | 435 | } |
27d6c865 | 436 | EXPORT_SYMBOL_GPL(kvm_inject_page_fault); |
c3c91fee | 437 | |
ef54bcfe | 438 | static bool kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
d4f8cf66 | 439 | { |
6389ee94 AK |
440 | if (mmu_is_nested(vcpu) && !fault->nested_page_fault) |
441 | vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault); | |
d4f8cf66 | 442 | else |
6389ee94 | 443 | vcpu->arch.mmu.inject_page_fault(vcpu, fault); |
ef54bcfe PB |
444 | |
445 | return fault->nested_page_fault; | |
d4f8cf66 JR |
446 | } |
447 | ||
3419ffc8 SY |
448 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
449 | { | |
7460fb4a AK |
450 | atomic_inc(&vcpu->arch.nmi_queued); |
451 | kvm_make_request(KVM_REQ_NMI, vcpu); | |
3419ffc8 SY |
452 | } |
453 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
454 | ||
298101da AK |
455 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
456 | { | |
ce7ddec4 | 457 | kvm_multiple_exception(vcpu, nr, true, error_code, false); |
298101da AK |
458 | } |
459 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
460 | ||
ce7ddec4 JR |
461 | void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
462 | { | |
463 | kvm_multiple_exception(vcpu, nr, true, error_code, true); | |
464 | } | |
465 | EXPORT_SYMBOL_GPL(kvm_requeue_exception_e); | |
466 | ||
0a79b009 AK |
467 | /* |
468 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
469 | * a #GP and return false. | |
470 | */ | |
471 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 472 | { |
0a79b009 AK |
473 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
474 | return true; | |
475 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
476 | return false; | |
298101da | 477 | } |
0a79b009 | 478 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 479 | |
16f8a6f9 NA |
480 | bool kvm_require_dr(struct kvm_vcpu *vcpu, int dr) |
481 | { | |
482 | if ((dr != 4 && dr != 5) || !kvm_read_cr4_bits(vcpu, X86_CR4_DE)) | |
483 | return true; | |
484 | ||
485 | kvm_queue_exception(vcpu, UD_VECTOR); | |
486 | return false; | |
487 | } | |
488 | EXPORT_SYMBOL_GPL(kvm_require_dr); | |
489 | ||
ec92fe44 JR |
490 | /* |
491 | * This function will be used to read from the physical memory of the currently | |
54bf36aa | 492 | * running guest. The difference to kvm_vcpu_read_guest_page is that this function |
ec92fe44 JR |
493 | * can read from guest physical or from the guest's guest physical memory. |
494 | */ | |
495 | int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, | |
496 | gfn_t ngfn, void *data, int offset, int len, | |
497 | u32 access) | |
498 | { | |
54987b7a | 499 | struct x86_exception exception; |
ec92fe44 JR |
500 | gfn_t real_gfn; |
501 | gpa_t ngpa; | |
502 | ||
503 | ngpa = gfn_to_gpa(ngfn); | |
54987b7a | 504 | real_gfn = mmu->translate_gpa(vcpu, ngpa, access, &exception); |
ec92fe44 JR |
505 | if (real_gfn == UNMAPPED_GVA) |
506 | return -EFAULT; | |
507 | ||
508 | real_gfn = gpa_to_gfn(real_gfn); | |
509 | ||
54bf36aa | 510 | return kvm_vcpu_read_guest_page(vcpu, real_gfn, data, offset, len); |
ec92fe44 JR |
511 | } |
512 | EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu); | |
513 | ||
69b0049a | 514 | static int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, |
3d06b8bf JR |
515 | void *data, int offset, int len, u32 access) |
516 | { | |
517 | return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn, | |
518 | data, offset, len, access); | |
519 | } | |
520 | ||
a03490ed CO |
521 | /* |
522 | * Load the pae pdptrs. Return true is they are all valid. | |
523 | */ | |
ff03a073 | 524 | int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3) |
a03490ed CO |
525 | { |
526 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
527 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
528 | int i; | |
529 | int ret; | |
ff03a073 | 530 | u64 pdpte[ARRAY_SIZE(mmu->pdptrs)]; |
a03490ed | 531 | |
ff03a073 JR |
532 | ret = kvm_read_guest_page_mmu(vcpu, mmu, pdpt_gfn, pdpte, |
533 | offset * sizeof(u64), sizeof(pdpte), | |
534 | PFERR_USER_MASK|PFERR_WRITE_MASK); | |
a03490ed CO |
535 | if (ret < 0) { |
536 | ret = 0; | |
537 | goto out; | |
538 | } | |
539 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
43a3795a | 540 | if (is_present_gpte(pdpte[i]) && |
a0a64f50 XG |
541 | (pdpte[i] & |
542 | vcpu->arch.mmu.guest_rsvd_check.rsvd_bits_mask[0][2])) { | |
a03490ed CO |
543 | ret = 0; |
544 | goto out; | |
545 | } | |
546 | } | |
547 | ret = 1; | |
548 | ||
ff03a073 | 549 | memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs)); |
6de4f3ad AK |
550 | __set_bit(VCPU_EXREG_PDPTR, |
551 | (unsigned long *)&vcpu->arch.regs_avail); | |
552 | __set_bit(VCPU_EXREG_PDPTR, | |
553 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 554 | out: |
a03490ed CO |
555 | |
556 | return ret; | |
557 | } | |
cc4b6871 | 558 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 559 | |
d835dfec AK |
560 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
561 | { | |
ff03a073 | 562 | u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)]; |
d835dfec | 563 | bool changed = true; |
3d06b8bf JR |
564 | int offset; |
565 | gfn_t gfn; | |
d835dfec AK |
566 | int r; |
567 | ||
568 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
569 | return false; | |
570 | ||
6de4f3ad AK |
571 | if (!test_bit(VCPU_EXREG_PDPTR, |
572 | (unsigned long *)&vcpu->arch.regs_avail)) | |
573 | return true; | |
574 | ||
9f8fe504 AK |
575 | gfn = (kvm_read_cr3(vcpu) & ~31u) >> PAGE_SHIFT; |
576 | offset = (kvm_read_cr3(vcpu) & ~31u) & (PAGE_SIZE - 1); | |
3d06b8bf JR |
577 | r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte), |
578 | PFERR_USER_MASK | PFERR_WRITE_MASK); | |
d835dfec AK |
579 | if (r < 0) |
580 | goto out; | |
ff03a073 | 581 | changed = memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 582 | out: |
d835dfec AK |
583 | |
584 | return changed; | |
585 | } | |
586 | ||
49a9b07e | 587 | int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed | 588 | { |
aad82703 | 589 | unsigned long old_cr0 = kvm_read_cr0(vcpu); |
d81135a5 | 590 | unsigned long update_bits = X86_CR0_PG | X86_CR0_WP; |
aad82703 | 591 | |
f9a48e6a AK |
592 | cr0 |= X86_CR0_ET; |
593 | ||
ab344828 | 594 | #ifdef CONFIG_X86_64 |
0f12244f GN |
595 | if (cr0 & 0xffffffff00000000UL) |
596 | return 1; | |
ab344828 GN |
597 | #endif |
598 | ||
599 | cr0 &= ~CR0_RESERVED_BITS; | |
a03490ed | 600 | |
0f12244f GN |
601 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) |
602 | return 1; | |
a03490ed | 603 | |
0f12244f GN |
604 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) |
605 | return 1; | |
a03490ed CO |
606 | |
607 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
608 | #ifdef CONFIG_X86_64 | |
f6801dff | 609 | if ((vcpu->arch.efer & EFER_LME)) { |
a03490ed CO |
610 | int cs_db, cs_l; |
611 | ||
0f12244f GN |
612 | if (!is_pae(vcpu)) |
613 | return 1; | |
a03490ed | 614 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
0f12244f GN |
615 | if (cs_l) |
616 | return 1; | |
a03490ed CO |
617 | } else |
618 | #endif | |
ff03a073 | 619 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
9f8fe504 | 620 | kvm_read_cr3(vcpu))) |
0f12244f | 621 | return 1; |
a03490ed CO |
622 | } |
623 | ||
ad756a16 MJ |
624 | if (!(cr0 & X86_CR0_PG) && kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE)) |
625 | return 1; | |
626 | ||
a03490ed | 627 | kvm_x86_ops->set_cr0(vcpu, cr0); |
a03490ed | 628 | |
d170c419 | 629 | if ((cr0 ^ old_cr0) & X86_CR0_PG) { |
e5f3f027 | 630 | kvm_clear_async_pf_completion_queue(vcpu); |
d170c419 LJ |
631 | kvm_async_pf_hash_reset(vcpu); |
632 | } | |
e5f3f027 | 633 | |
aad82703 SY |
634 | if ((cr0 ^ old_cr0) & update_bits) |
635 | kvm_mmu_reset_context(vcpu); | |
b18d5431 | 636 | |
879ae188 LE |
637 | if (((cr0 ^ old_cr0) & X86_CR0_CD) && |
638 | kvm_arch_has_noncoherent_dma(vcpu->kvm) && | |
639 | !kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED)) | |
b18d5431 XG |
640 | kvm_zap_gfn_range(vcpu->kvm, 0, ~0ULL); |
641 | ||
0f12244f GN |
642 | return 0; |
643 | } | |
2d3ad1f4 | 644 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 645 | |
2d3ad1f4 | 646 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 647 | { |
49a9b07e | 648 | (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f)); |
a03490ed | 649 | } |
2d3ad1f4 | 650 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 651 | |
42bdf991 MT |
652 | static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu) |
653 | { | |
654 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) && | |
655 | !vcpu->guest_xcr0_loaded) { | |
656 | /* kvm_set_xcr() also depends on this */ | |
657 | xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0); | |
658 | vcpu->guest_xcr0_loaded = 1; | |
659 | } | |
660 | } | |
661 | ||
662 | static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu) | |
663 | { | |
664 | if (vcpu->guest_xcr0_loaded) { | |
665 | if (vcpu->arch.xcr0 != host_xcr0) | |
666 | xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0); | |
667 | vcpu->guest_xcr0_loaded = 0; | |
668 | } | |
669 | } | |
670 | ||
69b0049a | 671 | static int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) |
2acf923e | 672 | { |
56c103ec LJ |
673 | u64 xcr0 = xcr; |
674 | u64 old_xcr0 = vcpu->arch.xcr0; | |
46c34cb0 | 675 | u64 valid_bits; |
2acf923e DC |
676 | |
677 | /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */ | |
678 | if (index != XCR_XFEATURE_ENABLED_MASK) | |
679 | return 1; | |
d91cab78 | 680 | if (!(xcr0 & XFEATURE_MASK_FP)) |
2acf923e | 681 | return 1; |
d91cab78 | 682 | if ((xcr0 & XFEATURE_MASK_YMM) && !(xcr0 & XFEATURE_MASK_SSE)) |
2acf923e | 683 | return 1; |
46c34cb0 PB |
684 | |
685 | /* | |
686 | * Do not allow the guest to set bits that we do not support | |
687 | * saving. However, xcr0 bit 0 is always set, even if the | |
688 | * emulated CPU does not support XSAVE (see fx_init). | |
689 | */ | |
d91cab78 | 690 | valid_bits = vcpu->arch.guest_supported_xcr0 | XFEATURE_MASK_FP; |
46c34cb0 | 691 | if (xcr0 & ~valid_bits) |
2acf923e | 692 | return 1; |
46c34cb0 | 693 | |
d91cab78 DH |
694 | if ((!(xcr0 & XFEATURE_MASK_BNDREGS)) != |
695 | (!(xcr0 & XFEATURE_MASK_BNDCSR))) | |
390bd528 LJ |
696 | return 1; |
697 | ||
d91cab78 DH |
698 | if (xcr0 & XFEATURE_MASK_AVX512) { |
699 | if (!(xcr0 & XFEATURE_MASK_YMM)) | |
612263b3 | 700 | return 1; |
d91cab78 | 701 | if ((xcr0 & XFEATURE_MASK_AVX512) != XFEATURE_MASK_AVX512) |
612263b3 CP |
702 | return 1; |
703 | } | |
2acf923e | 704 | vcpu->arch.xcr0 = xcr0; |
56c103ec | 705 | |
d91cab78 | 706 | if ((xcr0 ^ old_xcr0) & XFEATURE_MASK_EXTEND) |
56c103ec | 707 | kvm_update_cpuid(vcpu); |
2acf923e DC |
708 | return 0; |
709 | } | |
710 | ||
711 | int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) | |
712 | { | |
764bcbc5 Z |
713 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || |
714 | __kvm_set_xcr(vcpu, index, xcr)) { | |
2acf923e DC |
715 | kvm_inject_gp(vcpu, 0); |
716 | return 1; | |
717 | } | |
718 | return 0; | |
719 | } | |
720 | EXPORT_SYMBOL_GPL(kvm_set_xcr); | |
721 | ||
a83b29c6 | 722 | int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 723 | { |
fc78f519 | 724 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
0be0226f | 725 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE | |
b9baba86 | 726 | X86_CR4_SMEP | X86_CR4_SMAP | X86_CR4_PKE; |
0be0226f | 727 | |
0f12244f GN |
728 | if (cr4 & CR4_RESERVED_BITS) |
729 | return 1; | |
a03490ed | 730 | |
2acf923e DC |
731 | if (!guest_cpuid_has_xsave(vcpu) && (cr4 & X86_CR4_OSXSAVE)) |
732 | return 1; | |
733 | ||
c68b734f YW |
734 | if (!guest_cpuid_has_smep(vcpu) && (cr4 & X86_CR4_SMEP)) |
735 | return 1; | |
736 | ||
97ec8c06 FW |
737 | if (!guest_cpuid_has_smap(vcpu) && (cr4 & X86_CR4_SMAP)) |
738 | return 1; | |
739 | ||
afcbf13f | 740 | if (!guest_cpuid_has_fsgsbase(vcpu) && (cr4 & X86_CR4_FSGSBASE)) |
74dc2b4f YW |
741 | return 1; |
742 | ||
b9baba86 HH |
743 | if (!guest_cpuid_has_pku(vcpu) && (cr4 & X86_CR4_PKE)) |
744 | return 1; | |
745 | ||
a03490ed | 746 | if (is_long_mode(vcpu)) { |
0f12244f GN |
747 | if (!(cr4 & X86_CR4_PAE)) |
748 | return 1; | |
a2edf57f AK |
749 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
750 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
9f8fe504 AK |
751 | && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
752 | kvm_read_cr3(vcpu))) | |
0f12244f GN |
753 | return 1; |
754 | ||
ad756a16 MJ |
755 | if ((cr4 & X86_CR4_PCIDE) && !(old_cr4 & X86_CR4_PCIDE)) { |
756 | if (!guest_cpuid_has_pcid(vcpu)) | |
757 | return 1; | |
758 | ||
759 | /* PCID can not be enabled when cr3[11:0]!=000H or EFER.LMA=0 */ | |
760 | if ((kvm_read_cr3(vcpu) & X86_CR3_PCID_MASK) || !is_long_mode(vcpu)) | |
761 | return 1; | |
762 | } | |
763 | ||
5e1746d6 | 764 | if (kvm_x86_ops->set_cr4(vcpu, cr4)) |
0f12244f | 765 | return 1; |
a03490ed | 766 | |
ad756a16 MJ |
767 | if (((cr4 ^ old_cr4) & pdptr_bits) || |
768 | (!(cr4 & X86_CR4_PCIDE) && (old_cr4 & X86_CR4_PCIDE))) | |
aad82703 | 769 | kvm_mmu_reset_context(vcpu); |
0f12244f | 770 | |
b9baba86 | 771 | if ((cr4 ^ old_cr4) & (X86_CR4_OSXSAVE | X86_CR4_PKE)) |
00b27a3e | 772 | kvm_update_cpuid(vcpu); |
2acf923e | 773 | |
0f12244f GN |
774 | return 0; |
775 | } | |
2d3ad1f4 | 776 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 777 | |
2390218b | 778 | int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 779 | { |
ac146235 | 780 | #ifdef CONFIG_X86_64 |
9d88fca7 | 781 | cr3 &= ~CR3_PCID_INVD; |
ac146235 | 782 | #endif |
9d88fca7 | 783 | |
9f8fe504 | 784 | if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) { |
0ba73cda | 785 | kvm_mmu_sync_roots(vcpu); |
77c3913b | 786 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
0f12244f | 787 | return 0; |
d835dfec AK |
788 | } |
789 | ||
a03490ed | 790 | if (is_long_mode(vcpu)) { |
d9f89b88 JK |
791 | if (cr3 & CR3_L_MODE_RESERVED_BITS) |
792 | return 1; | |
793 | } else if (is_pae(vcpu) && is_paging(vcpu) && | |
794 | !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) | |
346874c9 | 795 | return 1; |
a03490ed | 796 | |
0f12244f | 797 | vcpu->arch.cr3 = cr3; |
aff48baa | 798 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
d8d173da | 799 | kvm_mmu_new_cr3(vcpu); |
0f12244f GN |
800 | return 0; |
801 | } | |
2d3ad1f4 | 802 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 803 | |
eea1cff9 | 804 | int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed | 805 | { |
0f12244f GN |
806 | if (cr8 & CR8_RESERVED_BITS) |
807 | return 1; | |
35754c98 | 808 | if (lapic_in_kernel(vcpu)) |
a03490ed CO |
809 | kvm_lapic_set_tpr(vcpu, cr8); |
810 | else | |
ad312c7c | 811 | vcpu->arch.cr8 = cr8; |
0f12244f GN |
812 | return 0; |
813 | } | |
2d3ad1f4 | 814 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 815 | |
2d3ad1f4 | 816 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed | 817 | { |
35754c98 | 818 | if (lapic_in_kernel(vcpu)) |
a03490ed CO |
819 | return kvm_lapic_get_cr8(vcpu); |
820 | else | |
ad312c7c | 821 | return vcpu->arch.cr8; |
a03490ed | 822 | } |
2d3ad1f4 | 823 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 824 | |
ae561ede NA |
825 | static void kvm_update_dr0123(struct kvm_vcpu *vcpu) |
826 | { | |
827 | int i; | |
828 | ||
829 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) { | |
830 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
831 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
832 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_RELOAD; | |
833 | } | |
834 | } | |
835 | ||
73aaf249 JK |
836 | static void kvm_update_dr6(struct kvm_vcpu *vcpu) |
837 | { | |
838 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
839 | kvm_x86_ops->set_dr6(vcpu, vcpu->arch.dr6); | |
840 | } | |
841 | ||
c8639010 JK |
842 | static void kvm_update_dr7(struct kvm_vcpu *vcpu) |
843 | { | |
844 | unsigned long dr7; | |
845 | ||
846 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) | |
847 | dr7 = vcpu->arch.guest_debug_dr7; | |
848 | else | |
849 | dr7 = vcpu->arch.dr7; | |
850 | kvm_x86_ops->set_dr7(vcpu, dr7); | |
360b948d PB |
851 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_BP_ENABLED; |
852 | if (dr7 & DR7_BP_EN_MASK) | |
853 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_BP_ENABLED; | |
c8639010 JK |
854 | } |
855 | ||
6f43ed01 NA |
856 | static u64 kvm_dr6_fixed(struct kvm_vcpu *vcpu) |
857 | { | |
858 | u64 fixed = DR6_FIXED_1; | |
859 | ||
860 | if (!guest_cpuid_has_rtm(vcpu)) | |
861 | fixed |= DR6_RTM; | |
862 | return fixed; | |
863 | } | |
864 | ||
338dbc97 | 865 | static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
020df079 GN |
866 | { |
867 | switch (dr) { | |
868 | case 0 ... 3: | |
869 | vcpu->arch.db[dr] = val; | |
870 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
871 | vcpu->arch.eff_db[dr] = val; | |
872 | break; | |
873 | case 4: | |
020df079 GN |
874 | /* fall through */ |
875 | case 6: | |
338dbc97 GN |
876 | if (val & 0xffffffff00000000ULL) |
877 | return -1; /* #GP */ | |
6f43ed01 | 878 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | kvm_dr6_fixed(vcpu); |
73aaf249 | 879 | kvm_update_dr6(vcpu); |
020df079 GN |
880 | break; |
881 | case 5: | |
020df079 GN |
882 | /* fall through */ |
883 | default: /* 7 */ | |
338dbc97 GN |
884 | if (val & 0xffffffff00000000ULL) |
885 | return -1; /* #GP */ | |
020df079 | 886 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; |
c8639010 | 887 | kvm_update_dr7(vcpu); |
020df079 GN |
888 | break; |
889 | } | |
890 | ||
891 | return 0; | |
892 | } | |
338dbc97 GN |
893 | |
894 | int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) | |
895 | { | |
16f8a6f9 | 896 | if (__kvm_set_dr(vcpu, dr, val)) { |
338dbc97 | 897 | kvm_inject_gp(vcpu, 0); |
16f8a6f9 NA |
898 | return 1; |
899 | } | |
900 | return 0; | |
338dbc97 | 901 | } |
020df079 GN |
902 | EXPORT_SYMBOL_GPL(kvm_set_dr); |
903 | ||
16f8a6f9 | 904 | int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) |
020df079 GN |
905 | { |
906 | switch (dr) { | |
907 | case 0 ... 3: | |
908 | *val = vcpu->arch.db[dr]; | |
909 | break; | |
910 | case 4: | |
020df079 GN |
911 | /* fall through */ |
912 | case 6: | |
73aaf249 JK |
913 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
914 | *val = vcpu->arch.dr6; | |
915 | else | |
916 | *val = kvm_x86_ops->get_dr6(vcpu); | |
020df079 GN |
917 | break; |
918 | case 5: | |
020df079 GN |
919 | /* fall through */ |
920 | default: /* 7 */ | |
921 | *val = vcpu->arch.dr7; | |
922 | break; | |
923 | } | |
338dbc97 GN |
924 | return 0; |
925 | } | |
020df079 GN |
926 | EXPORT_SYMBOL_GPL(kvm_get_dr); |
927 | ||
022cd0e8 AK |
928 | bool kvm_rdpmc(struct kvm_vcpu *vcpu) |
929 | { | |
930 | u32 ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
931 | u64 data; | |
932 | int err; | |
933 | ||
c6702c9d | 934 | err = kvm_pmu_rdpmc(vcpu, ecx, &data); |
022cd0e8 AK |
935 | if (err) |
936 | return err; | |
937 | kvm_register_write(vcpu, VCPU_REGS_RAX, (u32)data); | |
938 | kvm_register_write(vcpu, VCPU_REGS_RDX, data >> 32); | |
939 | return err; | |
940 | } | |
941 | EXPORT_SYMBOL_GPL(kvm_rdpmc); | |
942 | ||
043405e1 CO |
943 | /* |
944 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
945 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
946 | * | |
947 | * This list is modified at module load time to reflect the | |
e3267cbb | 948 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
62ef68bb PB |
949 | * kvm-specific. Those are put in emulated_msrs; filtering of emulated_msrs |
950 | * may depend on host virtualization features rather than host cpu features. | |
043405e1 | 951 | */ |
e3267cbb | 952 | |
043405e1 CO |
953 | static u32 msrs_to_save[] = { |
954 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
8c06585d | 955 | MSR_STAR, |
043405e1 CO |
956 | #ifdef CONFIG_X86_64 |
957 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
958 | #endif | |
b3897a49 | 959 | MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA, |
9dbe6cf9 | 960 | MSR_IA32_FEATURE_CONTROL, MSR_IA32_BNDCFGS, MSR_TSC_AUX, |
043405e1 CO |
961 | }; |
962 | ||
963 | static unsigned num_msrs_to_save; | |
964 | ||
62ef68bb PB |
965 | static u32 emulated_msrs[] = { |
966 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, | |
967 | MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW, | |
968 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, | |
969 | HV_X64_MSR_TIME_REF_COUNT, HV_X64_MSR_REFERENCE_TSC, | |
e7d9513b AS |
970 | HV_X64_MSR_CRASH_P0, HV_X64_MSR_CRASH_P1, HV_X64_MSR_CRASH_P2, |
971 | HV_X64_MSR_CRASH_P3, HV_X64_MSR_CRASH_P4, HV_X64_MSR_CRASH_CTL, | |
e516cebb | 972 | HV_X64_MSR_RESET, |
11c4b1ca | 973 | HV_X64_MSR_VP_INDEX, |
9eec50b8 | 974 | HV_X64_MSR_VP_RUNTIME, |
5c919412 | 975 | HV_X64_MSR_SCONTROL, |
1f4b34f8 | 976 | HV_X64_MSR_STIMER0_CONFIG, |
62ef68bb PB |
977 | HV_X64_MSR_APIC_ASSIST_PAGE, MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME, |
978 | MSR_KVM_PV_EOI_EN, | |
979 | ||
ba904635 | 980 | MSR_IA32_TSC_ADJUST, |
a3e06bbe | 981 | MSR_IA32_TSCDEADLINE, |
043405e1 | 982 | MSR_IA32_MISC_ENABLE, |
908e75f3 AK |
983 | MSR_IA32_MCG_STATUS, |
984 | MSR_IA32_MCG_CTL, | |
64d60670 | 985 | MSR_IA32_SMBASE, |
043405e1 CO |
986 | }; |
987 | ||
62ef68bb PB |
988 | static unsigned num_emulated_msrs; |
989 | ||
384bb783 | 990 | bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer) |
15c4a640 | 991 | { |
b69e8cae | 992 | if (efer & efer_reserved_bits) |
384bb783 | 993 | return false; |
15c4a640 | 994 | |
1b2fd70c AG |
995 | if (efer & EFER_FFXSR) { |
996 | struct kvm_cpuid_entry2 *feat; | |
997 | ||
998 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae | 999 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) |
384bb783 | 1000 | return false; |
1b2fd70c AG |
1001 | } |
1002 | ||
d8017474 AG |
1003 | if (efer & EFER_SVME) { |
1004 | struct kvm_cpuid_entry2 *feat; | |
1005 | ||
1006 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae | 1007 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) |
384bb783 | 1008 | return false; |
d8017474 AG |
1009 | } |
1010 | ||
384bb783 JK |
1011 | return true; |
1012 | } | |
1013 | EXPORT_SYMBOL_GPL(kvm_valid_efer); | |
1014 | ||
1015 | static int set_efer(struct kvm_vcpu *vcpu, u64 efer) | |
1016 | { | |
1017 | u64 old_efer = vcpu->arch.efer; | |
1018 | ||
1019 | if (!kvm_valid_efer(vcpu, efer)) | |
1020 | return 1; | |
1021 | ||
1022 | if (is_paging(vcpu) | |
1023 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) | |
1024 | return 1; | |
1025 | ||
15c4a640 | 1026 | efer &= ~EFER_LMA; |
f6801dff | 1027 | efer |= vcpu->arch.efer & EFER_LMA; |
15c4a640 | 1028 | |
a3d204e2 SY |
1029 | kvm_x86_ops->set_efer(vcpu, efer); |
1030 | ||
aad82703 SY |
1031 | /* Update reserved bits */ |
1032 | if ((efer ^ old_efer) & EFER_NX) | |
1033 | kvm_mmu_reset_context(vcpu); | |
1034 | ||
b69e8cae | 1035 | return 0; |
15c4a640 CO |
1036 | } |
1037 | ||
f2b4b7dd JR |
1038 | void kvm_enable_efer_bits(u64 mask) |
1039 | { | |
1040 | efer_reserved_bits &= ~mask; | |
1041 | } | |
1042 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
1043 | ||
15c4a640 CO |
1044 | /* |
1045 | * Writes msr value into into the appropriate "register". | |
1046 | * Returns 0 on success, non-0 otherwise. | |
1047 | * Assumes vcpu_load() was already called. | |
1048 | */ | |
8fe8ab46 | 1049 | int kvm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
15c4a640 | 1050 | { |
854e8bb1 NA |
1051 | switch (msr->index) { |
1052 | case MSR_FS_BASE: | |
1053 | case MSR_GS_BASE: | |
1054 | case MSR_KERNEL_GS_BASE: | |
1055 | case MSR_CSTAR: | |
1056 | case MSR_LSTAR: | |
1057 | if (is_noncanonical_address(msr->data)) | |
1058 | return 1; | |
1059 | break; | |
1060 | case MSR_IA32_SYSENTER_EIP: | |
1061 | case MSR_IA32_SYSENTER_ESP: | |
1062 | /* | |
1063 | * IA32_SYSENTER_ESP and IA32_SYSENTER_EIP cause #GP if | |
1064 | * non-canonical address is written on Intel but not on | |
1065 | * AMD (which ignores the top 32-bits, because it does | |
1066 | * not implement 64-bit SYSENTER). | |
1067 | * | |
1068 | * 64-bit code should hence be able to write a non-canonical | |
1069 | * value on AMD. Making the address canonical ensures that | |
1070 | * vmentry does not fail on Intel after writing a non-canonical | |
1071 | * value, and that something deterministic happens if the guest | |
1072 | * invokes 64-bit SYSENTER. | |
1073 | */ | |
1074 | msr->data = get_canonical(msr->data); | |
1075 | } | |
8fe8ab46 | 1076 | return kvm_x86_ops->set_msr(vcpu, msr); |
15c4a640 | 1077 | } |
854e8bb1 | 1078 | EXPORT_SYMBOL_GPL(kvm_set_msr); |
15c4a640 | 1079 | |
313a3dc7 CO |
1080 | /* |
1081 | * Adapt set_msr() to msr_io()'s calling convention | |
1082 | */ | |
609e36d3 PB |
1083 | static int do_get_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1084 | { | |
1085 | struct msr_data msr; | |
1086 | int r; | |
1087 | ||
1088 | msr.index = index; | |
1089 | msr.host_initiated = true; | |
1090 | r = kvm_get_msr(vcpu, &msr); | |
1091 | if (r) | |
1092 | return r; | |
1093 | ||
1094 | *data = msr.data; | |
1095 | return 0; | |
1096 | } | |
1097 | ||
313a3dc7 CO |
1098 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1099 | { | |
8fe8ab46 WA |
1100 | struct msr_data msr; |
1101 | ||
1102 | msr.data = *data; | |
1103 | msr.index = index; | |
1104 | msr.host_initiated = true; | |
1105 | return kvm_set_msr(vcpu, &msr); | |
313a3dc7 CO |
1106 | } |
1107 | ||
16e8d74d MT |
1108 | #ifdef CONFIG_X86_64 |
1109 | struct pvclock_gtod_data { | |
1110 | seqcount_t seq; | |
1111 | ||
1112 | struct { /* extract of a clocksource struct */ | |
1113 | int vclock_mode; | |
1114 | cycle_t cycle_last; | |
1115 | cycle_t mask; | |
1116 | u32 mult; | |
1117 | u32 shift; | |
1118 | } clock; | |
1119 | ||
cbcf2dd3 TG |
1120 | u64 boot_ns; |
1121 | u64 nsec_base; | |
16e8d74d MT |
1122 | }; |
1123 | ||
1124 | static struct pvclock_gtod_data pvclock_gtod_data; | |
1125 | ||
1126 | static void update_pvclock_gtod(struct timekeeper *tk) | |
1127 | { | |
1128 | struct pvclock_gtod_data *vdata = &pvclock_gtod_data; | |
cbcf2dd3 TG |
1129 | u64 boot_ns; |
1130 | ||
876e7881 | 1131 | boot_ns = ktime_to_ns(ktime_add(tk->tkr_mono.base, tk->offs_boot)); |
16e8d74d MT |
1132 | |
1133 | write_seqcount_begin(&vdata->seq); | |
1134 | ||
1135 | /* copy pvclock gtod data */ | |
876e7881 PZ |
1136 | vdata->clock.vclock_mode = tk->tkr_mono.clock->archdata.vclock_mode; |
1137 | vdata->clock.cycle_last = tk->tkr_mono.cycle_last; | |
1138 | vdata->clock.mask = tk->tkr_mono.mask; | |
1139 | vdata->clock.mult = tk->tkr_mono.mult; | |
1140 | vdata->clock.shift = tk->tkr_mono.shift; | |
16e8d74d | 1141 | |
cbcf2dd3 | 1142 | vdata->boot_ns = boot_ns; |
876e7881 | 1143 | vdata->nsec_base = tk->tkr_mono.xtime_nsec; |
16e8d74d MT |
1144 | |
1145 | write_seqcount_end(&vdata->seq); | |
1146 | } | |
1147 | #endif | |
1148 | ||
bab5bb39 NK |
1149 | void kvm_set_pending_timer(struct kvm_vcpu *vcpu) |
1150 | { | |
1151 | /* | |
1152 | * Note: KVM_REQ_PENDING_TIMER is implicitly checked in | |
1153 | * vcpu_enter_guest. This function is only called from | |
1154 | * the physical CPU that is running vcpu. | |
1155 | */ | |
1156 | kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); | |
1157 | } | |
16e8d74d | 1158 | |
18068523 GOC |
1159 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
1160 | { | |
9ed3c444 AK |
1161 | int version; |
1162 | int r; | |
50d0a0f9 | 1163 | struct pvclock_wall_clock wc; |
923de3cf | 1164 | struct timespec boot; |
18068523 GOC |
1165 | |
1166 | if (!wall_clock) | |
1167 | return; | |
1168 | ||
9ed3c444 AK |
1169 | r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version)); |
1170 | if (r) | |
1171 | return; | |
1172 | ||
1173 | if (version & 1) | |
1174 | ++version; /* first time write, random junk */ | |
1175 | ||
1176 | ++version; | |
18068523 | 1177 | |
1dab1345 NK |
1178 | if (kvm_write_guest(kvm, wall_clock, &version, sizeof(version))) |
1179 | return; | |
18068523 | 1180 | |
50d0a0f9 GH |
1181 | /* |
1182 | * The guest calculates current wall clock time by adding | |
34c238a1 | 1183 | * system time (updated by kvm_guest_time_update below) to the |
50d0a0f9 GH |
1184 | * wall clock specified here. guest system time equals host |
1185 | * system time for us, thus we must fill in host boot time here. | |
1186 | */ | |
923de3cf | 1187 | getboottime(&boot); |
50d0a0f9 | 1188 | |
4b648665 BR |
1189 | if (kvm->arch.kvmclock_offset) { |
1190 | struct timespec ts = ns_to_timespec(kvm->arch.kvmclock_offset); | |
1191 | boot = timespec_sub(boot, ts); | |
1192 | } | |
50d0a0f9 GH |
1193 | wc.sec = boot.tv_sec; |
1194 | wc.nsec = boot.tv_nsec; | |
1195 | wc.version = version; | |
18068523 GOC |
1196 | |
1197 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
1198 | ||
1199 | version++; | |
1200 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
1201 | } |
1202 | ||
50d0a0f9 GH |
1203 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
1204 | { | |
b51012de PB |
1205 | do_shl32_div32(dividend, divisor); |
1206 | return dividend; | |
50d0a0f9 GH |
1207 | } |
1208 | ||
3ae13faa | 1209 | static void kvm_get_time_scale(uint64_t scaled_hz, uint64_t base_hz, |
5f4e3f88 | 1210 | s8 *pshift, u32 *pmultiplier) |
50d0a0f9 | 1211 | { |
5f4e3f88 | 1212 | uint64_t scaled64; |
50d0a0f9 GH |
1213 | int32_t shift = 0; |
1214 | uint64_t tps64; | |
1215 | uint32_t tps32; | |
1216 | ||
3ae13faa PB |
1217 | tps64 = base_hz; |
1218 | scaled64 = scaled_hz; | |
50933623 | 1219 | while (tps64 > scaled64*2 || tps64 & 0xffffffff00000000ULL) { |
50d0a0f9 GH |
1220 | tps64 >>= 1; |
1221 | shift--; | |
1222 | } | |
1223 | ||
1224 | tps32 = (uint32_t)tps64; | |
50933623 JK |
1225 | while (tps32 <= scaled64 || scaled64 & 0xffffffff00000000ULL) { |
1226 | if (scaled64 & 0xffffffff00000000ULL || tps32 & 0x80000000) | |
5f4e3f88 ZA |
1227 | scaled64 >>= 1; |
1228 | else | |
1229 | tps32 <<= 1; | |
50d0a0f9 GH |
1230 | shift++; |
1231 | } | |
1232 | ||
5f4e3f88 ZA |
1233 | *pshift = shift; |
1234 | *pmultiplier = div_frac(scaled64, tps32); | |
50d0a0f9 | 1235 | |
3ae13faa PB |
1236 | pr_debug("%s: base_hz %llu => %llu, shift %d, mul %u\n", |
1237 | __func__, base_hz, scaled_hz, shift, *pmultiplier); | |
50d0a0f9 GH |
1238 | } |
1239 | ||
d828199e | 1240 | #ifdef CONFIG_X86_64 |
16e8d74d | 1241 | static atomic_t kvm_guest_has_master_clock = ATOMIC_INIT(0); |
d828199e | 1242 | #endif |
16e8d74d | 1243 | |
c8076604 | 1244 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
69b0049a | 1245 | static unsigned long max_tsc_khz; |
c8076604 | 1246 | |
cc578287 | 1247 | static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec) |
8cfdc000 | 1248 | { |
cc578287 ZA |
1249 | return pvclock_scale_delta(nsec, vcpu->arch.virtual_tsc_mult, |
1250 | vcpu->arch.virtual_tsc_shift); | |
8cfdc000 ZA |
1251 | } |
1252 | ||
cc578287 | 1253 | static u32 adjust_tsc_khz(u32 khz, s32 ppm) |
1e993611 | 1254 | { |
cc578287 ZA |
1255 | u64 v = (u64)khz * (1000000 + ppm); |
1256 | do_div(v, 1000000); | |
1257 | return v; | |
1e993611 JR |
1258 | } |
1259 | ||
381d585c HZ |
1260 | static int set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale) |
1261 | { | |
1262 | u64 ratio; | |
1263 | ||
1264 | /* Guest TSC same frequency as host TSC? */ | |
1265 | if (!scale) { | |
1266 | vcpu->arch.tsc_scaling_ratio = kvm_default_tsc_scaling_ratio; | |
1267 | return 0; | |
1268 | } | |
1269 | ||
1270 | /* TSC scaling supported? */ | |
1271 | if (!kvm_has_tsc_control) { | |
1272 | if (user_tsc_khz > tsc_khz) { | |
1273 | vcpu->arch.tsc_catchup = 1; | |
1274 | vcpu->arch.tsc_always_catchup = 1; | |
1275 | return 0; | |
1276 | } else { | |
1277 | WARN(1, "user requested TSC rate below hardware speed\n"); | |
1278 | return -1; | |
1279 | } | |
1280 | } | |
1281 | ||
1282 | /* TSC scaling required - calculate ratio */ | |
1283 | ratio = mul_u64_u32_div(1ULL << kvm_tsc_scaling_ratio_frac_bits, | |
1284 | user_tsc_khz, tsc_khz); | |
1285 | ||
1286 | if (ratio == 0 || ratio >= kvm_max_tsc_scaling_ratio) { | |
1287 | WARN_ONCE(1, "Invalid TSC scaling ratio - virtual-tsc-khz=%u\n", | |
1288 | user_tsc_khz); | |
1289 | return -1; | |
1290 | } | |
1291 | ||
1292 | vcpu->arch.tsc_scaling_ratio = ratio; | |
1293 | return 0; | |
1294 | } | |
1295 | ||
4941b8cb | 1296 | static int kvm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz) |
759379dd | 1297 | { |
cc578287 ZA |
1298 | u32 thresh_lo, thresh_hi; |
1299 | int use_scaling = 0; | |
217fc9cf | 1300 | |
03ba32ca | 1301 | /* tsc_khz can be zero if TSC calibration fails */ |
4941b8cb | 1302 | if (user_tsc_khz == 0) { |
ad721883 HZ |
1303 | /* set tsc_scaling_ratio to a safe value */ |
1304 | vcpu->arch.tsc_scaling_ratio = kvm_default_tsc_scaling_ratio; | |
381d585c | 1305 | return -1; |
ad721883 | 1306 | } |
03ba32ca | 1307 | |
c285545f | 1308 | /* Compute a scale to convert nanoseconds in TSC cycles */ |
3ae13faa | 1309 | kvm_get_time_scale(user_tsc_khz * 1000LL, NSEC_PER_SEC, |
cc578287 ZA |
1310 | &vcpu->arch.virtual_tsc_shift, |
1311 | &vcpu->arch.virtual_tsc_mult); | |
4941b8cb | 1312 | vcpu->arch.virtual_tsc_khz = user_tsc_khz; |
cc578287 ZA |
1313 | |
1314 | /* | |
1315 | * Compute the variation in TSC rate which is acceptable | |
1316 | * within the range of tolerance and decide if the | |
1317 | * rate being applied is within that bounds of the hardware | |
1318 | * rate. If so, no scaling or compensation need be done. | |
1319 | */ | |
1320 | thresh_lo = adjust_tsc_khz(tsc_khz, -tsc_tolerance_ppm); | |
1321 | thresh_hi = adjust_tsc_khz(tsc_khz, tsc_tolerance_ppm); | |
4941b8cb PB |
1322 | if (user_tsc_khz < thresh_lo || user_tsc_khz > thresh_hi) { |
1323 | pr_debug("kvm: requested TSC rate %u falls outside tolerance [%u,%u]\n", user_tsc_khz, thresh_lo, thresh_hi); | |
cc578287 ZA |
1324 | use_scaling = 1; |
1325 | } | |
4941b8cb | 1326 | return set_tsc_khz(vcpu, user_tsc_khz, use_scaling); |
c285545f ZA |
1327 | } |
1328 | ||
1329 | static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns) | |
1330 | { | |
e26101b1 | 1331 | u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.this_tsc_nsec, |
cc578287 ZA |
1332 | vcpu->arch.virtual_tsc_mult, |
1333 | vcpu->arch.virtual_tsc_shift); | |
e26101b1 | 1334 | tsc += vcpu->arch.this_tsc_write; |
c285545f ZA |
1335 | return tsc; |
1336 | } | |
1337 | ||
69b0049a | 1338 | static void kvm_track_tsc_matching(struct kvm_vcpu *vcpu) |
b48aa97e MT |
1339 | { |
1340 | #ifdef CONFIG_X86_64 | |
1341 | bool vcpus_matched; | |
b48aa97e MT |
1342 | struct kvm_arch *ka = &vcpu->kvm->arch; |
1343 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1344 | ||
1345 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1346 | atomic_read(&vcpu->kvm->online_vcpus)); | |
1347 | ||
7f187922 MT |
1348 | /* |
1349 | * Once the masterclock is enabled, always perform request in | |
1350 | * order to update it. | |
1351 | * | |
1352 | * In order to enable masterclock, the host clocksource must be TSC | |
1353 | * and the vcpus need to have matched TSCs. When that happens, | |
1354 | * perform request to enable masterclock. | |
1355 | */ | |
1356 | if (ka->use_master_clock || | |
1357 | (gtod->clock.vclock_mode == VCLOCK_TSC && vcpus_matched)) | |
b48aa97e MT |
1358 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
1359 | ||
1360 | trace_kvm_track_tsc(vcpu->vcpu_id, ka->nr_vcpus_matched_tsc, | |
1361 | atomic_read(&vcpu->kvm->online_vcpus), | |
1362 | ka->use_master_clock, gtod->clock.vclock_mode); | |
1363 | #endif | |
1364 | } | |
1365 | ||
ba904635 WA |
1366 | static void update_ia32_tsc_adjust_msr(struct kvm_vcpu *vcpu, s64 offset) |
1367 | { | |
1368 | u64 curr_offset = kvm_x86_ops->read_tsc_offset(vcpu); | |
1369 | vcpu->arch.ia32_tsc_adjust_msr += offset - curr_offset; | |
1370 | } | |
1371 | ||
35181e86 HZ |
1372 | /* |
1373 | * Multiply tsc by a fixed point number represented by ratio. | |
1374 | * | |
1375 | * The most significant 64-N bits (mult) of ratio represent the | |
1376 | * integral part of the fixed point number; the remaining N bits | |
1377 | * (frac) represent the fractional part, ie. ratio represents a fixed | |
1378 | * point number (mult + frac * 2^(-N)). | |
1379 | * | |
1380 | * N equals to kvm_tsc_scaling_ratio_frac_bits. | |
1381 | */ | |
1382 | static inline u64 __scale_tsc(u64 ratio, u64 tsc) | |
1383 | { | |
1384 | return mul_u64_u64_shr(tsc, ratio, kvm_tsc_scaling_ratio_frac_bits); | |
1385 | } | |
1386 | ||
1387 | u64 kvm_scale_tsc(struct kvm_vcpu *vcpu, u64 tsc) | |
1388 | { | |
1389 | u64 _tsc = tsc; | |
1390 | u64 ratio = vcpu->arch.tsc_scaling_ratio; | |
1391 | ||
1392 | if (ratio != kvm_default_tsc_scaling_ratio) | |
1393 | _tsc = __scale_tsc(ratio, tsc); | |
1394 | ||
1395 | return _tsc; | |
1396 | } | |
1397 | EXPORT_SYMBOL_GPL(kvm_scale_tsc); | |
1398 | ||
07c1419a HZ |
1399 | static u64 kvm_compute_tsc_offset(struct kvm_vcpu *vcpu, u64 target_tsc) |
1400 | { | |
1401 | u64 tsc; | |
1402 | ||
1403 | tsc = kvm_scale_tsc(vcpu, rdtsc()); | |
1404 | ||
1405 | return target_tsc - tsc; | |
1406 | } | |
1407 | ||
4ba76538 HZ |
1408 | u64 kvm_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc) |
1409 | { | |
1410 | return kvm_x86_ops->read_l1_tsc(vcpu, kvm_scale_tsc(vcpu, host_tsc)); | |
1411 | } | |
1412 | EXPORT_SYMBOL_GPL(kvm_read_l1_tsc); | |
1413 | ||
8fe8ab46 | 1414 | void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr) |
99e3e30a ZA |
1415 | { |
1416 | struct kvm *kvm = vcpu->kvm; | |
f38e098f | 1417 | u64 offset, ns, elapsed; |
99e3e30a | 1418 | unsigned long flags; |
02626b6a | 1419 | s64 usdiff; |
b48aa97e | 1420 | bool matched; |
0d3da0d2 | 1421 | bool already_matched; |
8fe8ab46 | 1422 | u64 data = msr->data; |
99e3e30a | 1423 | |
038f8c11 | 1424 | raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags); |
07c1419a | 1425 | offset = kvm_compute_tsc_offset(vcpu, data); |
759379dd | 1426 | ns = get_kernel_ns(); |
f38e098f | 1427 | elapsed = ns - kvm->arch.last_tsc_nsec; |
5d3cb0f6 | 1428 | |
03ba32ca | 1429 | if (vcpu->arch.virtual_tsc_khz) { |
8915aa27 MT |
1430 | int faulted = 0; |
1431 | ||
03ba32ca MT |
1432 | /* n.b - signed multiplication and division required */ |
1433 | usdiff = data - kvm->arch.last_tsc_write; | |
5d3cb0f6 | 1434 | #ifdef CONFIG_X86_64 |
03ba32ca | 1435 | usdiff = (usdiff * 1000) / vcpu->arch.virtual_tsc_khz; |
5d3cb0f6 | 1436 | #else |
03ba32ca | 1437 | /* do_div() only does unsigned */ |
8915aa27 MT |
1438 | asm("1: idivl %[divisor]\n" |
1439 | "2: xor %%edx, %%edx\n" | |
1440 | " movl $0, %[faulted]\n" | |
1441 | "3:\n" | |
1442 | ".section .fixup,\"ax\"\n" | |
1443 | "4: movl $1, %[faulted]\n" | |
1444 | " jmp 3b\n" | |
1445 | ".previous\n" | |
1446 | ||
1447 | _ASM_EXTABLE(1b, 4b) | |
1448 | ||
1449 | : "=A"(usdiff), [faulted] "=r" (faulted) | |
1450 | : "A"(usdiff * 1000), [divisor] "rm"(vcpu->arch.virtual_tsc_khz)); | |
1451 | ||
5d3cb0f6 | 1452 | #endif |
03ba32ca MT |
1453 | do_div(elapsed, 1000); |
1454 | usdiff -= elapsed; | |
1455 | if (usdiff < 0) | |
1456 | usdiff = -usdiff; | |
8915aa27 MT |
1457 | |
1458 | /* idivl overflow => difference is larger than USEC_PER_SEC */ | |
1459 | if (faulted) | |
1460 | usdiff = USEC_PER_SEC; | |
03ba32ca MT |
1461 | } else |
1462 | usdiff = USEC_PER_SEC; /* disable TSC match window below */ | |
f38e098f ZA |
1463 | |
1464 | /* | |
5d3cb0f6 ZA |
1465 | * Special case: TSC write with a small delta (1 second) of virtual |
1466 | * cycle time against real time is interpreted as an attempt to | |
1467 | * synchronize the CPU. | |
1468 | * | |
1469 | * For a reliable TSC, we can match TSC offsets, and for an unstable | |
1470 | * TSC, we add elapsed time in this computation. We could let the | |
1471 | * compensation code attempt to catch up if we fall behind, but | |
1472 | * it's better to try to match offsets from the beginning. | |
1473 | */ | |
02626b6a | 1474 | if (usdiff < USEC_PER_SEC && |
5d3cb0f6 | 1475 | vcpu->arch.virtual_tsc_khz == kvm->arch.last_tsc_khz) { |
f38e098f | 1476 | if (!check_tsc_unstable()) { |
e26101b1 | 1477 | offset = kvm->arch.cur_tsc_offset; |
f38e098f ZA |
1478 | pr_debug("kvm: matched tsc offset for %llu\n", data); |
1479 | } else { | |
857e4099 | 1480 | u64 delta = nsec_to_cycles(vcpu, elapsed); |
5d3cb0f6 | 1481 | data += delta; |
07c1419a | 1482 | offset = kvm_compute_tsc_offset(vcpu, data); |
759379dd | 1483 | pr_debug("kvm: adjusted tsc offset by %llu\n", delta); |
f38e098f | 1484 | } |
b48aa97e | 1485 | matched = true; |
0d3da0d2 | 1486 | already_matched = (vcpu->arch.this_tsc_generation == kvm->arch.cur_tsc_generation); |
e26101b1 ZA |
1487 | } else { |
1488 | /* | |
1489 | * We split periods of matched TSC writes into generations. | |
1490 | * For each generation, we track the original measured | |
1491 | * nanosecond time, offset, and write, so if TSCs are in | |
1492 | * sync, we can match exact offset, and if not, we can match | |
4a969980 | 1493 | * exact software computation in compute_guest_tsc() |
e26101b1 ZA |
1494 | * |
1495 | * These values are tracked in kvm->arch.cur_xxx variables. | |
1496 | */ | |
1497 | kvm->arch.cur_tsc_generation++; | |
1498 | kvm->arch.cur_tsc_nsec = ns; | |
1499 | kvm->arch.cur_tsc_write = data; | |
1500 | kvm->arch.cur_tsc_offset = offset; | |
b48aa97e | 1501 | matched = false; |
0d3da0d2 | 1502 | pr_debug("kvm: new tsc generation %llu, clock %llu\n", |
e26101b1 | 1503 | kvm->arch.cur_tsc_generation, data); |
f38e098f | 1504 | } |
e26101b1 ZA |
1505 | |
1506 | /* | |
1507 | * We also track th most recent recorded KHZ, write and time to | |
1508 | * allow the matching interval to be extended at each write. | |
1509 | */ | |
f38e098f ZA |
1510 | kvm->arch.last_tsc_nsec = ns; |
1511 | kvm->arch.last_tsc_write = data; | |
5d3cb0f6 | 1512 | kvm->arch.last_tsc_khz = vcpu->arch.virtual_tsc_khz; |
99e3e30a | 1513 | |
b183aa58 | 1514 | vcpu->arch.last_guest_tsc = data; |
e26101b1 ZA |
1515 | |
1516 | /* Keep track of which generation this VCPU has synchronized to */ | |
1517 | vcpu->arch.this_tsc_generation = kvm->arch.cur_tsc_generation; | |
1518 | vcpu->arch.this_tsc_nsec = kvm->arch.cur_tsc_nsec; | |
1519 | vcpu->arch.this_tsc_write = kvm->arch.cur_tsc_write; | |
1520 | ||
ba904635 WA |
1521 | if (guest_cpuid_has_tsc_adjust(vcpu) && !msr->host_initiated) |
1522 | update_ia32_tsc_adjust_msr(vcpu, offset); | |
e26101b1 ZA |
1523 | kvm_x86_ops->write_tsc_offset(vcpu, offset); |
1524 | raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags); | |
b48aa97e MT |
1525 | |
1526 | spin_lock(&kvm->arch.pvclock_gtod_sync_lock); | |
0d3da0d2 | 1527 | if (!matched) { |
b48aa97e | 1528 | kvm->arch.nr_vcpus_matched_tsc = 0; |
0d3da0d2 TG |
1529 | } else if (!already_matched) { |
1530 | kvm->arch.nr_vcpus_matched_tsc++; | |
1531 | } | |
b48aa97e MT |
1532 | |
1533 | kvm_track_tsc_matching(vcpu); | |
1534 | spin_unlock(&kvm->arch.pvclock_gtod_sync_lock); | |
99e3e30a | 1535 | } |
e26101b1 | 1536 | |
99e3e30a ZA |
1537 | EXPORT_SYMBOL_GPL(kvm_write_tsc); |
1538 | ||
58ea6767 HZ |
1539 | static inline void adjust_tsc_offset_guest(struct kvm_vcpu *vcpu, |
1540 | s64 adjustment) | |
1541 | { | |
1542 | kvm_x86_ops->adjust_tsc_offset_guest(vcpu, adjustment); | |
1543 | } | |
1544 | ||
1545 | static inline void adjust_tsc_offset_host(struct kvm_vcpu *vcpu, s64 adjustment) | |
1546 | { | |
1547 | if (vcpu->arch.tsc_scaling_ratio != kvm_default_tsc_scaling_ratio) | |
1548 | WARN_ON(adjustment < 0); | |
1549 | adjustment = kvm_scale_tsc(vcpu, (u64) adjustment); | |
1550 | kvm_x86_ops->adjust_tsc_offset_guest(vcpu, adjustment); | |
1551 | } | |
1552 | ||
d828199e MT |
1553 | #ifdef CONFIG_X86_64 |
1554 | ||
1555 | static cycle_t read_tsc(void) | |
1556 | { | |
03b9730b AL |
1557 | cycle_t ret = (cycle_t)rdtsc_ordered(); |
1558 | u64 last = pvclock_gtod_data.clock.cycle_last; | |
d828199e MT |
1559 | |
1560 | if (likely(ret >= last)) | |
1561 | return ret; | |
1562 | ||
1563 | /* | |
1564 | * GCC likes to generate cmov here, but this branch is extremely | |
6a6256f9 | 1565 | * predictable (it's just a function of time and the likely is |
d828199e MT |
1566 | * very likely) and there's a data dependence, so force GCC |
1567 | * to generate a branch instead. I don't barrier() because | |
1568 | * we don't actually need a barrier, and if this function | |
1569 | * ever gets inlined it will generate worse code. | |
1570 | */ | |
1571 | asm volatile (""); | |
1572 | return last; | |
1573 | } | |
1574 | ||
1575 | static inline u64 vgettsc(cycle_t *cycle_now) | |
1576 | { | |
1577 | long v; | |
1578 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1579 | ||
1580 | *cycle_now = read_tsc(); | |
1581 | ||
1582 | v = (*cycle_now - gtod->clock.cycle_last) & gtod->clock.mask; | |
1583 | return v * gtod->clock.mult; | |
1584 | } | |
1585 | ||
cbcf2dd3 | 1586 | static int do_monotonic_boot(s64 *t, cycle_t *cycle_now) |
d828199e | 1587 | { |
cbcf2dd3 | 1588 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; |
d828199e | 1589 | unsigned long seq; |
d828199e | 1590 | int mode; |
cbcf2dd3 | 1591 | u64 ns; |
d828199e | 1592 | |
d828199e MT |
1593 | do { |
1594 | seq = read_seqcount_begin(>od->seq); | |
1595 | mode = gtod->clock.vclock_mode; | |
cbcf2dd3 | 1596 | ns = gtod->nsec_base; |
d828199e MT |
1597 | ns += vgettsc(cycle_now); |
1598 | ns >>= gtod->clock.shift; | |
cbcf2dd3 | 1599 | ns += gtod->boot_ns; |
d828199e | 1600 | } while (unlikely(read_seqcount_retry(>od->seq, seq))); |
cbcf2dd3 | 1601 | *t = ns; |
d828199e MT |
1602 | |
1603 | return mode; | |
1604 | } | |
1605 | ||
1606 | /* returns true if host is using tsc clocksource */ | |
1607 | static bool kvm_get_time_and_clockread(s64 *kernel_ns, cycle_t *cycle_now) | |
1608 | { | |
d828199e MT |
1609 | /* checked again under seqlock below */ |
1610 | if (pvclock_gtod_data.clock.vclock_mode != VCLOCK_TSC) | |
1611 | return false; | |
1612 | ||
cbcf2dd3 | 1613 | return do_monotonic_boot(kernel_ns, cycle_now) == VCLOCK_TSC; |
d828199e MT |
1614 | } |
1615 | #endif | |
1616 | ||
1617 | /* | |
1618 | * | |
b48aa97e MT |
1619 | * Assuming a stable TSC across physical CPUS, and a stable TSC |
1620 | * across virtual CPUs, the following condition is possible. | |
1621 | * Each numbered line represents an event visible to both | |
d828199e MT |
1622 | * CPUs at the next numbered event. |
1623 | * | |
1624 | * "timespecX" represents host monotonic time. "tscX" represents | |
1625 | * RDTSC value. | |
1626 | * | |
1627 | * VCPU0 on CPU0 | VCPU1 on CPU1 | |
1628 | * | |
1629 | * 1. read timespec0,tsc0 | |
1630 | * 2. | timespec1 = timespec0 + N | |
1631 | * | tsc1 = tsc0 + M | |
1632 | * 3. transition to guest | transition to guest | |
1633 | * 4. ret0 = timespec0 + (rdtsc - tsc0) | | |
1634 | * 5. | ret1 = timespec1 + (rdtsc - tsc1) | |
1635 | * | ret1 = timespec0 + N + (rdtsc - (tsc0 + M)) | |
1636 | * | |
1637 | * Since ret0 update is visible to VCPU1 at time 5, to obey monotonicity: | |
1638 | * | |
1639 | * - ret0 < ret1 | |
1640 | * - timespec0 + (rdtsc - tsc0) < timespec0 + N + (rdtsc - (tsc0 + M)) | |
1641 | * ... | |
1642 | * - 0 < N - M => M < N | |
1643 | * | |
1644 | * That is, when timespec0 != timespec1, M < N. Unfortunately that is not | |
1645 | * always the case (the difference between two distinct xtime instances | |
1646 | * might be smaller then the difference between corresponding TSC reads, | |
1647 | * when updating guest vcpus pvclock areas). | |
1648 | * | |
1649 | * To avoid that problem, do not allow visibility of distinct | |
1650 | * system_timestamp/tsc_timestamp values simultaneously: use a master | |
1651 | * copy of host monotonic time values. Update that master copy | |
1652 | * in lockstep. | |
1653 | * | |
b48aa97e | 1654 | * Rely on synchronization of host TSCs and guest TSCs for monotonicity. |
d828199e MT |
1655 | * |
1656 | */ | |
1657 | ||
1658 | static void pvclock_update_vm_gtod_copy(struct kvm *kvm) | |
1659 | { | |
1660 | #ifdef CONFIG_X86_64 | |
1661 | struct kvm_arch *ka = &kvm->arch; | |
1662 | int vclock_mode; | |
b48aa97e MT |
1663 | bool host_tsc_clocksource, vcpus_matched; |
1664 | ||
1665 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1666 | atomic_read(&kvm->online_vcpus)); | |
d828199e MT |
1667 | |
1668 | /* | |
1669 | * If the host uses TSC clock, then passthrough TSC as stable | |
1670 | * to the guest. | |
1671 | */ | |
b48aa97e | 1672 | host_tsc_clocksource = kvm_get_time_and_clockread( |
d828199e MT |
1673 | &ka->master_kernel_ns, |
1674 | &ka->master_cycle_now); | |
1675 | ||
16a96021 | 1676 | ka->use_master_clock = host_tsc_clocksource && vcpus_matched |
54750f2c MT |
1677 | && !backwards_tsc_observed |
1678 | && !ka->boot_vcpu_runs_old_kvmclock; | |
b48aa97e | 1679 | |
d828199e MT |
1680 | if (ka->use_master_clock) |
1681 | atomic_set(&kvm_guest_has_master_clock, 1); | |
1682 | ||
1683 | vclock_mode = pvclock_gtod_data.clock.vclock_mode; | |
b48aa97e MT |
1684 | trace_kvm_update_master_clock(ka->use_master_clock, vclock_mode, |
1685 | vcpus_matched); | |
d828199e MT |
1686 | #endif |
1687 | } | |
1688 | ||
2860c4b1 PB |
1689 | void kvm_make_mclock_inprogress_request(struct kvm *kvm) |
1690 | { | |
1691 | kvm_make_all_cpus_request(kvm, KVM_REQ_MCLOCK_INPROGRESS); | |
1692 | } | |
1693 | ||
2e762ff7 MT |
1694 | static void kvm_gen_update_masterclock(struct kvm *kvm) |
1695 | { | |
1696 | #ifdef CONFIG_X86_64 | |
1697 | int i; | |
1698 | struct kvm_vcpu *vcpu; | |
1699 | struct kvm_arch *ka = &kvm->arch; | |
1700 | ||
1701 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
1702 | kvm_make_mclock_inprogress_request(kvm); | |
1703 | /* no guest entries from this point */ | |
1704 | pvclock_update_vm_gtod_copy(kvm); | |
1705 | ||
1706 | kvm_for_each_vcpu(i, vcpu, kvm) | |
105b21bb | 1707 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
2e762ff7 MT |
1708 | |
1709 | /* guest entries allowed */ | |
1710 | kvm_for_each_vcpu(i, vcpu, kvm) | |
1711 | clear_bit(KVM_REQ_MCLOCK_INPROGRESS, &vcpu->requests); | |
1712 | ||
1713 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
1714 | #endif | |
1715 | } | |
1716 | ||
34c238a1 | 1717 | static int kvm_guest_time_update(struct kvm_vcpu *v) |
18068523 | 1718 | { |
78db6a50 | 1719 | unsigned long flags, tgt_tsc_khz; |
18068523 | 1720 | struct kvm_vcpu_arch *vcpu = &v->arch; |
d828199e | 1721 | struct kvm_arch *ka = &v->kvm->arch; |
f25e656d | 1722 | s64 kernel_ns; |
d828199e | 1723 | u64 tsc_timestamp, host_tsc; |
0b79459b | 1724 | struct pvclock_vcpu_time_info guest_hv_clock; |
51d59c6b | 1725 | u8 pvclock_flags; |
d828199e MT |
1726 | bool use_master_clock; |
1727 | ||
1728 | kernel_ns = 0; | |
1729 | host_tsc = 0; | |
18068523 | 1730 | |
d828199e MT |
1731 | /* |
1732 | * If the host uses TSC clock, then passthrough TSC as stable | |
1733 | * to the guest. | |
1734 | */ | |
1735 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
1736 | use_master_clock = ka->use_master_clock; | |
1737 | if (use_master_clock) { | |
1738 | host_tsc = ka->master_cycle_now; | |
1739 | kernel_ns = ka->master_kernel_ns; | |
1740 | } | |
1741 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
c09664bb MT |
1742 | |
1743 | /* Keep irq disabled to prevent changes to the clock */ | |
1744 | local_irq_save(flags); | |
78db6a50 PB |
1745 | tgt_tsc_khz = __this_cpu_read(cpu_tsc_khz); |
1746 | if (unlikely(tgt_tsc_khz == 0)) { | |
c09664bb MT |
1747 | local_irq_restore(flags); |
1748 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); | |
1749 | return 1; | |
1750 | } | |
d828199e | 1751 | if (!use_master_clock) { |
4ea1636b | 1752 | host_tsc = rdtsc(); |
d828199e MT |
1753 | kernel_ns = get_kernel_ns(); |
1754 | } | |
1755 | ||
4ba76538 | 1756 | tsc_timestamp = kvm_read_l1_tsc(v, host_tsc); |
d828199e | 1757 | |
c285545f ZA |
1758 | /* |
1759 | * We may have to catch up the TSC to match elapsed wall clock | |
1760 | * time for two reasons, even if kvmclock is used. | |
1761 | * 1) CPU could have been running below the maximum TSC rate | |
1762 | * 2) Broken TSC compensation resets the base at each VCPU | |
1763 | * entry to avoid unknown leaps of TSC even when running | |
1764 | * again on the same CPU. This may cause apparent elapsed | |
1765 | * time to disappear, and the guest to stand still or run | |
1766 | * very slowly. | |
1767 | */ | |
1768 | if (vcpu->tsc_catchup) { | |
1769 | u64 tsc = compute_guest_tsc(v, kernel_ns); | |
1770 | if (tsc > tsc_timestamp) { | |
f1e2b260 | 1771 | adjust_tsc_offset_guest(v, tsc - tsc_timestamp); |
c285545f ZA |
1772 | tsc_timestamp = tsc; |
1773 | } | |
50d0a0f9 GH |
1774 | } |
1775 | ||
18068523 GOC |
1776 | local_irq_restore(flags); |
1777 | ||
0b79459b | 1778 | if (!vcpu->pv_time_enabled) |
c285545f | 1779 | return 0; |
18068523 | 1780 | |
78db6a50 PB |
1781 | if (kvm_has_tsc_control) |
1782 | tgt_tsc_khz = kvm_scale_tsc(v, tgt_tsc_khz); | |
1783 | ||
1784 | if (unlikely(vcpu->hw_tsc_khz != tgt_tsc_khz)) { | |
3ae13faa | 1785 | kvm_get_time_scale(NSEC_PER_SEC, tgt_tsc_khz * 1000LL, |
5f4e3f88 ZA |
1786 | &vcpu->hv_clock.tsc_shift, |
1787 | &vcpu->hv_clock.tsc_to_system_mul); | |
78db6a50 | 1788 | vcpu->hw_tsc_khz = tgt_tsc_khz; |
8cfdc000 ZA |
1789 | } |
1790 | ||
1791 | /* With all the info we got, fill in the values */ | |
1d5f066e | 1792 | vcpu->hv_clock.tsc_timestamp = tsc_timestamp; |
759379dd | 1793 | vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset; |
28e4639a | 1794 | vcpu->last_guest_tsc = tsc_timestamp; |
51d59c6b | 1795 | |
09a0c3f1 OH |
1796 | if (unlikely(kvm_read_guest_cached(v->kvm, &vcpu->pv_time, |
1797 | &guest_hv_clock, sizeof(guest_hv_clock)))) | |
1798 | return 0; | |
1799 | ||
5dca0d91 RK |
1800 | /* This VCPU is paused, but it's legal for a guest to read another |
1801 | * VCPU's kvmclock, so we really have to follow the specification where | |
1802 | * it says that version is odd if data is being modified, and even after | |
1803 | * it is consistent. | |
1804 | * | |
1805 | * Version field updates must be kept separate. This is because | |
1806 | * kvm_write_guest_cached might use a "rep movs" instruction, and | |
1807 | * writes within a string instruction are weakly ordered. So there | |
1808 | * are three writes overall. | |
1809 | * | |
1810 | * As a small optimization, only write the version field in the first | |
1811 | * and third write. The vcpu->pv_time cache is still valid, because the | |
1812 | * version field is the first in the struct. | |
18068523 | 1813 | */ |
5dca0d91 RK |
1814 | BUILD_BUG_ON(offsetof(struct pvclock_vcpu_time_info, version) != 0); |
1815 | ||
1816 | vcpu->hv_clock.version = guest_hv_clock.version + 1; | |
1817 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, | |
1818 | &vcpu->hv_clock, | |
1819 | sizeof(vcpu->hv_clock.version)); | |
1820 | ||
1821 | smp_wmb(); | |
78c0337a MT |
1822 | |
1823 | /* retain PVCLOCK_GUEST_STOPPED if set in guest copy */ | |
0b79459b | 1824 | pvclock_flags = (guest_hv_clock.flags & PVCLOCK_GUEST_STOPPED); |
78c0337a MT |
1825 | |
1826 | if (vcpu->pvclock_set_guest_stopped_request) { | |
1827 | pvclock_flags |= PVCLOCK_GUEST_STOPPED; | |
1828 | vcpu->pvclock_set_guest_stopped_request = false; | |
1829 | } | |
1830 | ||
d828199e MT |
1831 | /* If the host uses TSC clocksource, then it is stable */ |
1832 | if (use_master_clock) | |
1833 | pvclock_flags |= PVCLOCK_TSC_STABLE_BIT; | |
1834 | ||
78c0337a MT |
1835 | vcpu->hv_clock.flags = pvclock_flags; |
1836 | ||
ce1a5e60 DM |
1837 | trace_kvm_pvclock_update(v->vcpu_id, &vcpu->hv_clock); |
1838 | ||
0b79459b AH |
1839 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
1840 | &vcpu->hv_clock, | |
1841 | sizeof(vcpu->hv_clock)); | |
5dca0d91 RK |
1842 | |
1843 | smp_wmb(); | |
1844 | ||
1845 | vcpu->hv_clock.version++; | |
1846 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, | |
1847 | &vcpu->hv_clock, | |
1848 | sizeof(vcpu->hv_clock.version)); | |
8cfdc000 | 1849 | return 0; |
c8076604 GH |
1850 | } |
1851 | ||
0061d53d MT |
1852 | /* |
1853 | * kvmclock updates which are isolated to a given vcpu, such as | |
1854 | * vcpu->cpu migration, should not allow system_timestamp from | |
1855 | * the rest of the vcpus to remain static. Otherwise ntp frequency | |
1856 | * correction applies to one vcpu's system_timestamp but not | |
1857 | * the others. | |
1858 | * | |
1859 | * So in those cases, request a kvmclock update for all vcpus. | |
7e44e449 AJ |
1860 | * We need to rate-limit these requests though, as they can |
1861 | * considerably slow guests that have a large number of vcpus. | |
1862 | * The time for a remote vcpu to update its kvmclock is bound | |
1863 | * by the delay we use to rate-limit the updates. | |
0061d53d MT |
1864 | */ |
1865 | ||
7e44e449 AJ |
1866 | #define KVMCLOCK_UPDATE_DELAY msecs_to_jiffies(100) |
1867 | ||
1868 | static void kvmclock_update_fn(struct work_struct *work) | |
0061d53d MT |
1869 | { |
1870 | int i; | |
7e44e449 AJ |
1871 | struct delayed_work *dwork = to_delayed_work(work); |
1872 | struct kvm_arch *ka = container_of(dwork, struct kvm_arch, | |
1873 | kvmclock_update_work); | |
1874 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
0061d53d MT |
1875 | struct kvm_vcpu *vcpu; |
1876 | ||
1877 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
105b21bb | 1878 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0061d53d MT |
1879 | kvm_vcpu_kick(vcpu); |
1880 | } | |
1881 | } | |
1882 | ||
7e44e449 AJ |
1883 | static void kvm_gen_kvmclock_update(struct kvm_vcpu *v) |
1884 | { | |
1885 | struct kvm *kvm = v->kvm; | |
1886 | ||
105b21bb | 1887 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); |
7e44e449 AJ |
1888 | schedule_delayed_work(&kvm->arch.kvmclock_update_work, |
1889 | KVMCLOCK_UPDATE_DELAY); | |
1890 | } | |
1891 | ||
332967a3 AJ |
1892 | #define KVMCLOCK_SYNC_PERIOD (300 * HZ) |
1893 | ||
1894 | static void kvmclock_sync_fn(struct work_struct *work) | |
1895 | { | |
1896 | struct delayed_work *dwork = to_delayed_work(work); | |
1897 | struct kvm_arch *ka = container_of(dwork, struct kvm_arch, | |
1898 | kvmclock_sync_work); | |
1899 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
1900 | ||
630994b3 MT |
1901 | if (!kvmclock_periodic_sync) |
1902 | return; | |
1903 | ||
332967a3 AJ |
1904 | schedule_delayed_work(&kvm->arch.kvmclock_update_work, 0); |
1905 | schedule_delayed_work(&kvm->arch.kvmclock_sync_work, | |
1906 | KVMCLOCK_SYNC_PERIOD); | |
1907 | } | |
1908 | ||
890ca9ae | 1909 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
15c4a640 | 1910 | { |
890ca9ae HY |
1911 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1912 | unsigned bank_num = mcg_cap & 0xff; | |
1913 | ||
15c4a640 | 1914 | switch (msr) { |
15c4a640 | 1915 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 1916 | vcpu->arch.mcg_status = data; |
15c4a640 | 1917 | break; |
c7ac679c | 1918 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1919 | if (!(mcg_cap & MCG_CTL_P)) |
1920 | return 1; | |
1921 | if (data != 0 && data != ~(u64)0) | |
1922 | return -1; | |
1923 | vcpu->arch.mcg_ctl = data; | |
1924 | break; | |
1925 | default: | |
1926 | if (msr >= MSR_IA32_MC0_CTL && | |
81760dcc | 1927 | msr < MSR_IA32_MCx_CTL(bank_num)) { |
890ca9ae | 1928 | u32 offset = msr - MSR_IA32_MC0_CTL; |
114be429 AP |
1929 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
1930 | * some Linux kernels though clear bit 10 in bank 4 to | |
1931 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore | |
1932 | * this to avoid an uncatched #GP in the guest | |
1933 | */ | |
890ca9ae | 1934 | if ((offset & 0x3) == 0 && |
114be429 | 1935 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
890ca9ae HY |
1936 | return -1; |
1937 | vcpu->arch.mce_banks[offset] = data; | |
1938 | break; | |
1939 | } | |
1940 | return 1; | |
1941 | } | |
1942 | return 0; | |
1943 | } | |
1944 | ||
ffde22ac ES |
1945 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
1946 | { | |
1947 | struct kvm *kvm = vcpu->kvm; | |
1948 | int lm = is_long_mode(vcpu); | |
1949 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
1950 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
1951 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
1952 | : kvm->arch.xen_hvm_config.blob_size_32; | |
1953 | u32 page_num = data & ~PAGE_MASK; | |
1954 | u64 page_addr = data & PAGE_MASK; | |
1955 | u8 *page; | |
1956 | int r; | |
1957 | ||
1958 | r = -E2BIG; | |
1959 | if (page_num >= blob_size) | |
1960 | goto out; | |
1961 | r = -ENOMEM; | |
ff5c2c03 SL |
1962 | page = memdup_user(blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE); |
1963 | if (IS_ERR(page)) { | |
1964 | r = PTR_ERR(page); | |
ffde22ac | 1965 | goto out; |
ff5c2c03 | 1966 | } |
54bf36aa | 1967 | if (kvm_vcpu_write_guest(vcpu, page_addr, page, PAGE_SIZE)) |
ffde22ac ES |
1968 | goto out_free; |
1969 | r = 0; | |
1970 | out_free: | |
1971 | kfree(page); | |
1972 | out: | |
1973 | return r; | |
1974 | } | |
1975 | ||
344d9588 GN |
1976 | static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data) |
1977 | { | |
1978 | gpa_t gpa = data & ~0x3f; | |
1979 | ||
4a969980 | 1980 | /* Bits 2:5 are reserved, Should be zero */ |
6adba527 | 1981 | if (data & 0x3c) |
344d9588 GN |
1982 | return 1; |
1983 | ||
1984 | vcpu->arch.apf.msr_val = data; | |
1985 | ||
1986 | if (!(data & KVM_ASYNC_PF_ENABLED)) { | |
1987 | kvm_clear_async_pf_completion_queue(vcpu); | |
1988 | kvm_async_pf_hash_reset(vcpu); | |
1989 | return 0; | |
1990 | } | |
1991 | ||
8f964525 AH |
1992 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.apf.data, gpa, |
1993 | sizeof(u32))) | |
344d9588 GN |
1994 | return 1; |
1995 | ||
6adba527 | 1996 | vcpu->arch.apf.send_user_only = !(data & KVM_ASYNC_PF_SEND_ALWAYS); |
344d9588 GN |
1997 | kvm_async_pf_wakeup_all(vcpu); |
1998 | return 0; | |
1999 | } | |
2000 | ||
12f9a48f GC |
2001 | static void kvmclock_reset(struct kvm_vcpu *vcpu) |
2002 | { | |
0b79459b | 2003 | vcpu->arch.pv_time_enabled = false; |
12f9a48f GC |
2004 | } |
2005 | ||
c9aaa895 GC |
2006 | static void record_steal_time(struct kvm_vcpu *vcpu) |
2007 | { | |
2008 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
2009 | return; | |
2010 | ||
2011 | if (unlikely(kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, | |
2012 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)))) | |
2013 | return; | |
2014 | ||
35f3fae1 WL |
2015 | if (vcpu->arch.st.steal.version & 1) |
2016 | vcpu->arch.st.steal.version += 1; /* first time write, random junk */ | |
2017 | ||
2018 | vcpu->arch.st.steal.version += 1; | |
2019 | ||
2020 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, | |
2021 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); | |
2022 | ||
2023 | smp_wmb(); | |
2024 | ||
c54cdf14 LC |
2025 | vcpu->arch.st.steal.steal += current->sched_info.run_delay - |
2026 | vcpu->arch.st.last_steal; | |
2027 | vcpu->arch.st.last_steal = current->sched_info.run_delay; | |
35f3fae1 WL |
2028 | |
2029 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, | |
2030 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); | |
2031 | ||
2032 | smp_wmb(); | |
2033 | ||
2034 | vcpu->arch.st.steal.version += 1; | |
c9aaa895 GC |
2035 | |
2036 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, | |
2037 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); | |
2038 | } | |
2039 | ||
8fe8ab46 | 2040 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
15c4a640 | 2041 | { |
5753785f | 2042 | bool pr = false; |
8fe8ab46 WA |
2043 | u32 msr = msr_info->index; |
2044 | u64 data = msr_info->data; | |
5753785f | 2045 | |
15c4a640 | 2046 | switch (msr) { |
2e32b719 BP |
2047 | case MSR_AMD64_NB_CFG: |
2048 | case MSR_IA32_UCODE_REV: | |
2049 | case MSR_IA32_UCODE_WRITE: | |
2050 | case MSR_VM_HSAVE_PA: | |
2051 | case MSR_AMD64_PATCH_LOADER: | |
2052 | case MSR_AMD64_BU_CFG2: | |
2053 | break; | |
2054 | ||
15c4a640 | 2055 | case MSR_EFER: |
b69e8cae | 2056 | return set_efer(vcpu, data); |
8f1589d9 AP |
2057 | case MSR_K7_HWCR: |
2058 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
82494028 | 2059 | data &= ~(u64)0x100; /* ignore ignne emulation enable */ |
a223c313 | 2060 | data &= ~(u64)0x8; /* ignore TLB cache disable */ |
22d48b2d | 2061 | data &= ~(u64)0x40000; /* ignore Mc status write enable */ |
8f1589d9 | 2062 | if (data != 0) { |
a737f256 CD |
2063 | vcpu_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", |
2064 | data); | |
8f1589d9 AP |
2065 | return 1; |
2066 | } | |
15c4a640 | 2067 | break; |
f7c6d140 AP |
2068 | case MSR_FAM10H_MMIO_CONF_BASE: |
2069 | if (data != 0) { | |
a737f256 CD |
2070 | vcpu_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " |
2071 | "0x%llx\n", data); | |
f7c6d140 AP |
2072 | return 1; |
2073 | } | |
15c4a640 | 2074 | break; |
b5e2fec0 AG |
2075 | case MSR_IA32_DEBUGCTLMSR: |
2076 | if (!data) { | |
2077 | /* We support the non-activated case already */ | |
2078 | break; | |
2079 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
2080 | /* Values other than LBR and BTF are vendor-specific, | |
2081 | thus reserved and should throw a #GP */ | |
2082 | return 1; | |
2083 | } | |
a737f256 CD |
2084 | vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", |
2085 | __func__, data); | |
b5e2fec0 | 2086 | break; |
9ba075a6 | 2087 | case 0x200 ... 0x2ff: |
ff53604b | 2088 | return kvm_mtrr_set_msr(vcpu, msr, data); |
15c4a640 | 2089 | case MSR_IA32_APICBASE: |
58cb628d | 2090 | return kvm_set_apic_base(vcpu, msr_info); |
0105d1a5 GN |
2091 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
2092 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
a3e06bbe LJ |
2093 | case MSR_IA32_TSCDEADLINE: |
2094 | kvm_set_lapic_tscdeadline_msr(vcpu, data); | |
2095 | break; | |
ba904635 WA |
2096 | case MSR_IA32_TSC_ADJUST: |
2097 | if (guest_cpuid_has_tsc_adjust(vcpu)) { | |
2098 | if (!msr_info->host_initiated) { | |
d913b904 | 2099 | s64 adj = data - vcpu->arch.ia32_tsc_adjust_msr; |
d7add054 | 2100 | adjust_tsc_offset_guest(vcpu, adj); |
ba904635 WA |
2101 | } |
2102 | vcpu->arch.ia32_tsc_adjust_msr = data; | |
2103 | } | |
2104 | break; | |
15c4a640 | 2105 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 2106 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 2107 | break; |
64d60670 PB |
2108 | case MSR_IA32_SMBASE: |
2109 | if (!msr_info->host_initiated) | |
2110 | return 1; | |
2111 | vcpu->arch.smbase = data; | |
2112 | break; | |
11c6bffa | 2113 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
2114 | case MSR_KVM_WALL_CLOCK: |
2115 | vcpu->kvm->arch.wall_clock = data; | |
2116 | kvm_write_wall_clock(vcpu->kvm, data); | |
2117 | break; | |
11c6bffa | 2118 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 | 2119 | case MSR_KVM_SYSTEM_TIME: { |
0b79459b | 2120 | u64 gpa_offset; |
54750f2c MT |
2121 | struct kvm_arch *ka = &vcpu->kvm->arch; |
2122 | ||
12f9a48f | 2123 | kvmclock_reset(vcpu); |
18068523 | 2124 | |
54750f2c MT |
2125 | if (vcpu->vcpu_id == 0 && !msr_info->host_initiated) { |
2126 | bool tmp = (msr == MSR_KVM_SYSTEM_TIME); | |
2127 | ||
2128 | if (ka->boot_vcpu_runs_old_kvmclock != tmp) | |
2129 | set_bit(KVM_REQ_MASTERCLOCK_UPDATE, | |
2130 | &vcpu->requests); | |
2131 | ||
2132 | ka->boot_vcpu_runs_old_kvmclock = tmp; | |
2133 | } | |
2134 | ||
18068523 | 2135 | vcpu->arch.time = data; |
0061d53d | 2136 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
18068523 GOC |
2137 | |
2138 | /* we verify if the enable bit is set... */ | |
2139 | if (!(data & 1)) | |
2140 | break; | |
2141 | ||
0b79459b | 2142 | gpa_offset = data & ~(PAGE_MASK | 1); |
18068523 | 2143 | |
0b79459b | 2144 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, |
8f964525 AH |
2145 | &vcpu->arch.pv_time, data & ~1ULL, |
2146 | sizeof(struct pvclock_vcpu_time_info))) | |
0b79459b AH |
2147 | vcpu->arch.pv_time_enabled = false; |
2148 | else | |
2149 | vcpu->arch.pv_time_enabled = true; | |
32cad84f | 2150 | |
18068523 GOC |
2151 | break; |
2152 | } | |
344d9588 GN |
2153 | case MSR_KVM_ASYNC_PF_EN: |
2154 | if (kvm_pv_enable_async_pf(vcpu, data)) | |
2155 | return 1; | |
2156 | break; | |
c9aaa895 GC |
2157 | case MSR_KVM_STEAL_TIME: |
2158 | ||
2159 | if (unlikely(!sched_info_on())) | |
2160 | return 1; | |
2161 | ||
2162 | if (data & KVM_STEAL_RESERVED_MASK) | |
2163 | return 1; | |
2164 | ||
2165 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.st.stime, | |
8f964525 AH |
2166 | data & KVM_STEAL_VALID_BITS, |
2167 | sizeof(struct kvm_steal_time))) | |
c9aaa895 GC |
2168 | return 1; |
2169 | ||
2170 | vcpu->arch.st.msr_val = data; | |
2171 | ||
2172 | if (!(data & KVM_MSR_ENABLED)) | |
2173 | break; | |
2174 | ||
c9aaa895 GC |
2175 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); |
2176 | ||
2177 | break; | |
ae7a2a3f MT |
2178 | case MSR_KVM_PV_EOI_EN: |
2179 | if (kvm_lapic_enable_pv_eoi(vcpu, data)) | |
2180 | return 1; | |
2181 | break; | |
c9aaa895 | 2182 | |
890ca9ae HY |
2183 | case MSR_IA32_MCG_CTL: |
2184 | case MSR_IA32_MCG_STATUS: | |
81760dcc | 2185 | case MSR_IA32_MC0_CTL ... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS) - 1: |
890ca9ae | 2186 | return set_msr_mce(vcpu, msr, data); |
71db6023 | 2187 | |
6912ac32 WH |
2188 | case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3: |
2189 | case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1: | |
2190 | pr = true; /* fall through */ | |
2191 | case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3: | |
2192 | case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1: | |
c6702c9d | 2193 | if (kvm_pmu_is_valid_msr(vcpu, msr)) |
afd80d85 | 2194 | return kvm_pmu_set_msr(vcpu, msr_info); |
5753785f GN |
2195 | |
2196 | if (pr || data != 0) | |
a737f256 CD |
2197 | vcpu_unimpl(vcpu, "disabled perfctr wrmsr: " |
2198 | "0x%x data 0x%llx\n", msr, data); | |
5753785f | 2199 | break; |
84e0cefa JS |
2200 | case MSR_K7_CLK_CTL: |
2201 | /* | |
2202 | * Ignore all writes to this no longer documented MSR. | |
2203 | * Writes are only relevant for old K7 processors, | |
2204 | * all pre-dating SVM, but a recommended workaround from | |
4a969980 | 2205 | * AMD for these chips. It is possible to specify the |
84e0cefa JS |
2206 | * affected processor models on the command line, hence |
2207 | * the need to ignore the workaround. | |
2208 | */ | |
2209 | break; | |
55cd8e5a | 2210 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
e7d9513b AS |
2211 | case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: |
2212 | case HV_X64_MSR_CRASH_CTL: | |
1f4b34f8 | 2213 | case HV_X64_MSR_STIMER0_CONFIG ... HV_X64_MSR_STIMER3_COUNT: |
e7d9513b AS |
2214 | return kvm_hv_set_msr_common(vcpu, msr, data, |
2215 | msr_info->host_initiated); | |
91c9c3ed | 2216 | case MSR_IA32_BBL_CR_CTL3: |
2217 | /* Drop writes to this legacy MSR -- see rdmsr | |
2218 | * counterpart for further detail. | |
2219 | */ | |
a737f256 | 2220 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", msr, data); |
91c9c3ed | 2221 | break; |
2b036c6b BO |
2222 | case MSR_AMD64_OSVW_ID_LENGTH: |
2223 | if (!guest_cpuid_has_osvw(vcpu)) | |
2224 | return 1; | |
2225 | vcpu->arch.osvw.length = data; | |
2226 | break; | |
2227 | case MSR_AMD64_OSVW_STATUS: | |
2228 | if (!guest_cpuid_has_osvw(vcpu)) | |
2229 | return 1; | |
2230 | vcpu->arch.osvw.status = data; | |
2231 | break; | |
15c4a640 | 2232 | default: |
ffde22ac ES |
2233 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
2234 | return xen_hvm_config(vcpu, data); | |
c6702c9d | 2235 | if (kvm_pmu_is_valid_msr(vcpu, msr)) |
afd80d85 | 2236 | return kvm_pmu_set_msr(vcpu, msr_info); |
ed85c068 | 2237 | if (!ignore_msrs) { |
a737f256 CD |
2238 | vcpu_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", |
2239 | msr, data); | |
ed85c068 AP |
2240 | return 1; |
2241 | } else { | |
a737f256 CD |
2242 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", |
2243 | msr, data); | |
ed85c068 AP |
2244 | break; |
2245 | } | |
15c4a640 CO |
2246 | } |
2247 | return 0; | |
2248 | } | |
2249 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
2250 | ||
2251 | ||
2252 | /* | |
2253 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
2254 | * Returns 0 on success, non-0 otherwise. | |
2255 | * Assumes vcpu_load() was already called. | |
2256 | */ | |
609e36d3 | 2257 | int kvm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
15c4a640 | 2258 | { |
609e36d3 | 2259 | return kvm_x86_ops->get_msr(vcpu, msr); |
15c4a640 | 2260 | } |
ff651cb6 | 2261 | EXPORT_SYMBOL_GPL(kvm_get_msr); |
15c4a640 | 2262 | |
890ca9ae | 2263 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
2264 | { |
2265 | u64 data; | |
890ca9ae HY |
2266 | u64 mcg_cap = vcpu->arch.mcg_cap; |
2267 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
2268 | |
2269 | switch (msr) { | |
15c4a640 CO |
2270 | case MSR_IA32_P5_MC_ADDR: |
2271 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
2272 | data = 0; |
2273 | break; | |
15c4a640 | 2274 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
2275 | data = vcpu->arch.mcg_cap; |
2276 | break; | |
c7ac679c | 2277 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
2278 | if (!(mcg_cap & MCG_CTL_P)) |
2279 | return 1; | |
2280 | data = vcpu->arch.mcg_ctl; | |
2281 | break; | |
2282 | case MSR_IA32_MCG_STATUS: | |
2283 | data = vcpu->arch.mcg_status; | |
2284 | break; | |
2285 | default: | |
2286 | if (msr >= MSR_IA32_MC0_CTL && | |
81760dcc | 2287 | msr < MSR_IA32_MCx_CTL(bank_num)) { |
890ca9ae HY |
2288 | u32 offset = msr - MSR_IA32_MC0_CTL; |
2289 | data = vcpu->arch.mce_banks[offset]; | |
2290 | break; | |
2291 | } | |
2292 | return 1; | |
2293 | } | |
2294 | *pdata = data; | |
2295 | return 0; | |
2296 | } | |
2297 | ||
609e36d3 | 2298 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
890ca9ae | 2299 | { |
609e36d3 | 2300 | switch (msr_info->index) { |
890ca9ae | 2301 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 2302 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
2303 | case MSR_IA32_DEBUGCTLMSR: |
2304 | case MSR_IA32_LASTBRANCHFROMIP: | |
2305 | case MSR_IA32_LASTBRANCHTOIP: | |
2306 | case MSR_IA32_LASTINTFROMIP: | |
2307 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd | 2308 | case MSR_K8_SYSCFG: |
3afb1121 PB |
2309 | case MSR_K8_TSEG_ADDR: |
2310 | case MSR_K8_TSEG_MASK: | |
60af2ecd | 2311 | case MSR_K7_HWCR: |
61a6bd67 | 2312 | case MSR_VM_HSAVE_PA: |
1fdbd48c | 2313 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 2314 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 2315 | case MSR_FAM10H_MMIO_CONF_BASE: |
2e32b719 | 2316 | case MSR_AMD64_BU_CFG2: |
0c2df2a1 | 2317 | case MSR_IA32_PERF_CTL: |
609e36d3 | 2318 | msr_info->data = 0; |
15c4a640 | 2319 | break; |
6912ac32 WH |
2320 | case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3: |
2321 | case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3: | |
2322 | case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1: | |
2323 | case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1: | |
c6702c9d | 2324 | if (kvm_pmu_is_valid_msr(vcpu, msr_info->index)) |
609e36d3 PB |
2325 | return kvm_pmu_get_msr(vcpu, msr_info->index, &msr_info->data); |
2326 | msr_info->data = 0; | |
5753785f | 2327 | break; |
742bc670 | 2328 | case MSR_IA32_UCODE_REV: |
609e36d3 | 2329 | msr_info->data = 0x100000000ULL; |
742bc670 | 2330 | break; |
9ba075a6 | 2331 | case MSR_MTRRcap: |
9ba075a6 | 2332 | case 0x200 ... 0x2ff: |
ff53604b | 2333 | return kvm_mtrr_get_msr(vcpu, msr_info->index, &msr_info->data); |
15c4a640 | 2334 | case 0xcd: /* fsb frequency */ |
609e36d3 | 2335 | msr_info->data = 3; |
15c4a640 | 2336 | break; |
7b914098 JS |
2337 | /* |
2338 | * MSR_EBC_FREQUENCY_ID | |
2339 | * Conservative value valid for even the basic CPU models. | |
2340 | * Models 0,1: 000 in bits 23:21 indicating a bus speed of | |
2341 | * 100MHz, model 2 000 in bits 18:16 indicating 100MHz, | |
2342 | * and 266MHz for model 3, or 4. Set Core Clock | |
2343 | * Frequency to System Bus Frequency Ratio to 1 (bits | |
2344 | * 31:24) even though these are only valid for CPU | |
2345 | * models > 2, however guests may end up dividing or | |
2346 | * multiplying by zero otherwise. | |
2347 | */ | |
2348 | case MSR_EBC_FREQUENCY_ID: | |
609e36d3 | 2349 | msr_info->data = 1 << 24; |
7b914098 | 2350 | break; |
15c4a640 | 2351 | case MSR_IA32_APICBASE: |
609e36d3 | 2352 | msr_info->data = kvm_get_apic_base(vcpu); |
15c4a640 | 2353 | break; |
0105d1a5 | 2354 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
609e36d3 | 2355 | return kvm_x2apic_msr_read(vcpu, msr_info->index, &msr_info->data); |
0105d1a5 | 2356 | break; |
a3e06bbe | 2357 | case MSR_IA32_TSCDEADLINE: |
609e36d3 | 2358 | msr_info->data = kvm_get_lapic_tscdeadline_msr(vcpu); |
a3e06bbe | 2359 | break; |
ba904635 | 2360 | case MSR_IA32_TSC_ADJUST: |
609e36d3 | 2361 | msr_info->data = (u64)vcpu->arch.ia32_tsc_adjust_msr; |
ba904635 | 2362 | break; |
15c4a640 | 2363 | case MSR_IA32_MISC_ENABLE: |
609e36d3 | 2364 | msr_info->data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 2365 | break; |
64d60670 PB |
2366 | case MSR_IA32_SMBASE: |
2367 | if (!msr_info->host_initiated) | |
2368 | return 1; | |
2369 | msr_info->data = vcpu->arch.smbase; | |
15c4a640 | 2370 | break; |
847f0ad8 AG |
2371 | case MSR_IA32_PERF_STATUS: |
2372 | /* TSC increment by tick */ | |
609e36d3 | 2373 | msr_info->data = 1000ULL; |
847f0ad8 | 2374 | /* CPU multiplier */ |
b0996ae4 | 2375 | msr_info->data |= (((uint64_t)4ULL) << 40); |
847f0ad8 | 2376 | break; |
15c4a640 | 2377 | case MSR_EFER: |
609e36d3 | 2378 | msr_info->data = vcpu->arch.efer; |
15c4a640 | 2379 | break; |
18068523 | 2380 | case MSR_KVM_WALL_CLOCK: |
11c6bffa | 2381 | case MSR_KVM_WALL_CLOCK_NEW: |
609e36d3 | 2382 | msr_info->data = vcpu->kvm->arch.wall_clock; |
18068523 GOC |
2383 | break; |
2384 | case MSR_KVM_SYSTEM_TIME: | |
11c6bffa | 2385 | case MSR_KVM_SYSTEM_TIME_NEW: |
609e36d3 | 2386 | msr_info->data = vcpu->arch.time; |
18068523 | 2387 | break; |
344d9588 | 2388 | case MSR_KVM_ASYNC_PF_EN: |
609e36d3 | 2389 | msr_info->data = vcpu->arch.apf.msr_val; |
344d9588 | 2390 | break; |
c9aaa895 | 2391 | case MSR_KVM_STEAL_TIME: |
609e36d3 | 2392 | msr_info->data = vcpu->arch.st.msr_val; |
c9aaa895 | 2393 | break; |
1d92128f | 2394 | case MSR_KVM_PV_EOI_EN: |
609e36d3 | 2395 | msr_info->data = vcpu->arch.pv_eoi.msr_val; |
1d92128f | 2396 | break; |
890ca9ae HY |
2397 | case MSR_IA32_P5_MC_ADDR: |
2398 | case MSR_IA32_P5_MC_TYPE: | |
2399 | case MSR_IA32_MCG_CAP: | |
2400 | case MSR_IA32_MCG_CTL: | |
2401 | case MSR_IA32_MCG_STATUS: | |
81760dcc | 2402 | case MSR_IA32_MC0_CTL ... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS) - 1: |
609e36d3 | 2403 | return get_msr_mce(vcpu, msr_info->index, &msr_info->data); |
84e0cefa JS |
2404 | case MSR_K7_CLK_CTL: |
2405 | /* | |
2406 | * Provide expected ramp-up count for K7. All other | |
2407 | * are set to zero, indicating minimum divisors for | |
2408 | * every field. | |
2409 | * | |
2410 | * This prevents guest kernels on AMD host with CPU | |
2411 | * type 6, model 8 and higher from exploding due to | |
2412 | * the rdmsr failing. | |
2413 | */ | |
609e36d3 | 2414 | msr_info->data = 0x20000000; |
84e0cefa | 2415 | break; |
55cd8e5a | 2416 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
e7d9513b AS |
2417 | case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: |
2418 | case HV_X64_MSR_CRASH_CTL: | |
1f4b34f8 | 2419 | case HV_X64_MSR_STIMER0_CONFIG ... HV_X64_MSR_STIMER3_COUNT: |
e83d5887 AS |
2420 | return kvm_hv_get_msr_common(vcpu, |
2421 | msr_info->index, &msr_info->data); | |
55cd8e5a | 2422 | break; |
91c9c3ed | 2423 | case MSR_IA32_BBL_CR_CTL3: |
2424 | /* This legacy MSR exists but isn't fully documented in current | |
2425 | * silicon. It is however accessed by winxp in very narrow | |
2426 | * scenarios where it sets bit #19, itself documented as | |
2427 | * a "reserved" bit. Best effort attempt to source coherent | |
2428 | * read data here should the balance of the register be | |
2429 | * interpreted by the guest: | |
2430 | * | |
2431 | * L2 cache control register 3: 64GB range, 256KB size, | |
2432 | * enabled, latency 0x1, configured | |
2433 | */ | |
609e36d3 | 2434 | msr_info->data = 0xbe702111; |
91c9c3ed | 2435 | break; |
2b036c6b BO |
2436 | case MSR_AMD64_OSVW_ID_LENGTH: |
2437 | if (!guest_cpuid_has_osvw(vcpu)) | |
2438 | return 1; | |
609e36d3 | 2439 | msr_info->data = vcpu->arch.osvw.length; |
2b036c6b BO |
2440 | break; |
2441 | case MSR_AMD64_OSVW_STATUS: | |
2442 | if (!guest_cpuid_has_osvw(vcpu)) | |
2443 | return 1; | |
609e36d3 | 2444 | msr_info->data = vcpu->arch.osvw.status; |
2b036c6b | 2445 | break; |
15c4a640 | 2446 | default: |
c6702c9d | 2447 | if (kvm_pmu_is_valid_msr(vcpu, msr_info->index)) |
609e36d3 | 2448 | return kvm_pmu_get_msr(vcpu, msr_info->index, &msr_info->data); |
ed85c068 | 2449 | if (!ignore_msrs) { |
609e36d3 | 2450 | vcpu_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr_info->index); |
ed85c068 AP |
2451 | return 1; |
2452 | } else { | |
609e36d3 PB |
2453 | vcpu_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr_info->index); |
2454 | msr_info->data = 0; | |
ed85c068 AP |
2455 | } |
2456 | break; | |
15c4a640 | 2457 | } |
15c4a640 CO |
2458 | return 0; |
2459 | } | |
2460 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
2461 | ||
313a3dc7 CO |
2462 | /* |
2463 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
2464 | * | |
2465 | * @return number of msrs set successfully. | |
2466 | */ | |
2467 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
2468 | struct kvm_msr_entry *entries, | |
2469 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2470 | unsigned index, u64 *data)) | |
2471 | { | |
f656ce01 | 2472 | int i, idx; |
313a3dc7 | 2473 | |
f656ce01 | 2474 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
313a3dc7 CO |
2475 | for (i = 0; i < msrs->nmsrs; ++i) |
2476 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2477 | break; | |
f656ce01 | 2478 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 2479 | |
313a3dc7 CO |
2480 | return i; |
2481 | } | |
2482 | ||
2483 | /* | |
2484 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2485 | * | |
2486 | * @return number of msrs set successfully. | |
2487 | */ | |
2488 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
2489 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2490 | unsigned index, u64 *data), | |
2491 | int writeback) | |
2492 | { | |
2493 | struct kvm_msrs msrs; | |
2494 | struct kvm_msr_entry *entries; | |
2495 | int r, n; | |
2496 | unsigned size; | |
2497 | ||
2498 | r = -EFAULT; | |
2499 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
2500 | goto out; | |
2501 | ||
2502 | r = -E2BIG; | |
2503 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2504 | goto out; | |
2505 | ||
313a3dc7 | 2506 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; |
ff5c2c03 SL |
2507 | entries = memdup_user(user_msrs->entries, size); |
2508 | if (IS_ERR(entries)) { | |
2509 | r = PTR_ERR(entries); | |
313a3dc7 | 2510 | goto out; |
ff5c2c03 | 2511 | } |
313a3dc7 CO |
2512 | |
2513 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
2514 | if (r < 0) | |
2515 | goto out_free; | |
2516 | ||
2517 | r = -EFAULT; | |
2518 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2519 | goto out_free; | |
2520 | ||
2521 | r = n; | |
2522 | ||
2523 | out_free: | |
7a73c028 | 2524 | kfree(entries); |
313a3dc7 CO |
2525 | out: |
2526 | return r; | |
2527 | } | |
2528 | ||
784aa3d7 | 2529 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
018d00d2 ZX |
2530 | { |
2531 | int r; | |
2532 | ||
2533 | switch (ext) { | |
2534 | case KVM_CAP_IRQCHIP: | |
2535 | case KVM_CAP_HLT: | |
2536 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 2537 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 2538 | case KVM_CAP_EXT_CPUID: |
9c15bb1d | 2539 | case KVM_CAP_EXT_EMUL_CPUID: |
c8076604 | 2540 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 2541 | case KVM_CAP_PIT: |
a28e4f5a | 2542 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 2543 | case KVM_CAP_MP_STATE: |
ed848624 | 2544 | case KVM_CAP_SYNC_MMU: |
a355c85c | 2545 | case KVM_CAP_USER_NMI: |
52d939a0 | 2546 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 2547 | case KVM_CAP_IRQ_INJECT_STATUS: |
d34e6b17 | 2548 | case KVM_CAP_IOEVENTFD: |
f848a5a8 | 2549 | case KVM_CAP_IOEVENTFD_NO_LENGTH: |
c5ff41ce | 2550 | case KVM_CAP_PIT2: |
e9f42757 | 2551 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 2552 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 2553 | case KVM_CAP_XEN_HVM: |
afbcf7ab | 2554 | case KVM_CAP_ADJUST_CLOCK: |
3cfc3092 | 2555 | case KVM_CAP_VCPU_EVENTS: |
55cd8e5a | 2556 | case KVM_CAP_HYPERV: |
10388a07 | 2557 | case KVM_CAP_HYPERV_VAPIC: |
c25bc163 | 2558 | case KVM_CAP_HYPERV_SPIN: |
5c919412 | 2559 | case KVM_CAP_HYPERV_SYNIC: |
ab9f4ecb | 2560 | case KVM_CAP_PCI_SEGMENT: |
a1efbe77 | 2561 | case KVM_CAP_DEBUGREGS: |
d2be1651 | 2562 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
2d5b5a66 | 2563 | case KVM_CAP_XSAVE: |
344d9588 | 2564 | case KVM_CAP_ASYNC_PF: |
92a1f12d | 2565 | case KVM_CAP_GET_TSC_KHZ: |
1c0b28c2 | 2566 | case KVM_CAP_KVMCLOCK_CTRL: |
4d8b81ab | 2567 | case KVM_CAP_READONLY_MEM: |
5f66b620 | 2568 | case KVM_CAP_HYPERV_TIME: |
100943c5 | 2569 | case KVM_CAP_IOAPIC_POLARITY_IGNORED: |
defcf51f | 2570 | case KVM_CAP_TSC_DEADLINE_TIMER: |
90de4a18 NA |
2571 | case KVM_CAP_ENABLE_CAP_VM: |
2572 | case KVM_CAP_DISABLE_QUIRKS: | |
d71ba788 | 2573 | case KVM_CAP_SET_BOOT_CPU_ID: |
49df6397 | 2574 | case KVM_CAP_SPLIT_IRQCHIP: |
2a5bab10 AW |
2575 | #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT |
2576 | case KVM_CAP_ASSIGN_DEV_IRQ: | |
2577 | case KVM_CAP_PCI_2_3: | |
2578 | #endif | |
018d00d2 ZX |
2579 | r = 1; |
2580 | break; | |
6d396b55 PB |
2581 | case KVM_CAP_X86_SMM: |
2582 | /* SMBASE is usually relocated above 1M on modern chipsets, | |
2583 | * and SMM handlers might indeed rely on 4G segment limits, | |
2584 | * so do not report SMM to be available if real mode is | |
2585 | * emulated via vm86 mode. Still, do not go to great lengths | |
2586 | * to avoid userspace's usage of the feature, because it is a | |
2587 | * fringe case that is not enabled except via specific settings | |
2588 | * of the module parameters. | |
2589 | */ | |
2590 | r = kvm_x86_ops->cpu_has_high_real_mode_segbase(); | |
2591 | break; | |
542472b5 LV |
2592 | case KVM_CAP_COALESCED_MMIO: |
2593 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
2594 | break; | |
774ead3a AK |
2595 | case KVM_CAP_VAPIC: |
2596 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
2597 | break; | |
f725230a | 2598 | case KVM_CAP_NR_VCPUS: |
8c3ba334 SL |
2599 | r = KVM_SOFT_MAX_VCPUS; |
2600 | break; | |
2601 | case KVM_CAP_MAX_VCPUS: | |
f725230a AK |
2602 | r = KVM_MAX_VCPUS; |
2603 | break; | |
a988b910 | 2604 | case KVM_CAP_NR_MEMSLOTS: |
bbacc0c1 | 2605 | r = KVM_USER_MEM_SLOTS; |
a988b910 | 2606 | break; |
a68a6a72 MT |
2607 | case KVM_CAP_PV_MMU: /* obsolete */ |
2608 | r = 0; | |
2f333bcb | 2609 | break; |
4cee4b72 | 2610 | #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT |
62c476c7 | 2611 | case KVM_CAP_IOMMU: |
a1b60c1c | 2612 | r = iommu_present(&pci_bus_type); |
62c476c7 | 2613 | break; |
4cee4b72 | 2614 | #endif |
890ca9ae HY |
2615 | case KVM_CAP_MCE: |
2616 | r = KVM_MAX_MCE_BANKS; | |
2617 | break; | |
2d5b5a66 | 2618 | case KVM_CAP_XCRS: |
d366bf7e | 2619 | r = boot_cpu_has(X86_FEATURE_XSAVE); |
2d5b5a66 | 2620 | break; |
92a1f12d JR |
2621 | case KVM_CAP_TSC_CONTROL: |
2622 | r = kvm_has_tsc_control; | |
2623 | break; | |
018d00d2 ZX |
2624 | default: |
2625 | r = 0; | |
2626 | break; | |
2627 | } | |
2628 | return r; | |
2629 | ||
2630 | } | |
2631 | ||
043405e1 CO |
2632 | long kvm_arch_dev_ioctl(struct file *filp, |
2633 | unsigned int ioctl, unsigned long arg) | |
2634 | { | |
2635 | void __user *argp = (void __user *)arg; | |
2636 | long r; | |
2637 | ||
2638 | switch (ioctl) { | |
2639 | case KVM_GET_MSR_INDEX_LIST: { | |
2640 | struct kvm_msr_list __user *user_msr_list = argp; | |
2641 | struct kvm_msr_list msr_list; | |
2642 | unsigned n; | |
2643 | ||
2644 | r = -EFAULT; | |
2645 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
2646 | goto out; | |
2647 | n = msr_list.nmsrs; | |
62ef68bb | 2648 | msr_list.nmsrs = num_msrs_to_save + num_emulated_msrs; |
043405e1 CO |
2649 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
2650 | goto out; | |
2651 | r = -E2BIG; | |
e125e7b6 | 2652 | if (n < msr_list.nmsrs) |
043405e1 CO |
2653 | goto out; |
2654 | r = -EFAULT; | |
2655 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
2656 | num_msrs_to_save * sizeof(u32))) | |
2657 | goto out; | |
e125e7b6 | 2658 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 | 2659 | &emulated_msrs, |
62ef68bb | 2660 | num_emulated_msrs * sizeof(u32))) |
043405e1 CO |
2661 | goto out; |
2662 | r = 0; | |
2663 | break; | |
2664 | } | |
9c15bb1d BP |
2665 | case KVM_GET_SUPPORTED_CPUID: |
2666 | case KVM_GET_EMULATED_CPUID: { | |
674eea0f AK |
2667 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
2668 | struct kvm_cpuid2 cpuid; | |
2669 | ||
2670 | r = -EFAULT; | |
2671 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2672 | goto out; | |
9c15bb1d BP |
2673 | |
2674 | r = kvm_dev_ioctl_get_cpuid(&cpuid, cpuid_arg->entries, | |
2675 | ioctl); | |
674eea0f AK |
2676 | if (r) |
2677 | goto out; | |
2678 | ||
2679 | r = -EFAULT; | |
2680 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2681 | goto out; | |
2682 | r = 0; | |
2683 | break; | |
2684 | } | |
890ca9ae HY |
2685 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
2686 | u64 mce_cap; | |
2687 | ||
2688 | mce_cap = KVM_MCE_CAP_SUPPORTED; | |
2689 | r = -EFAULT; | |
2690 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) | |
2691 | goto out; | |
2692 | r = 0; | |
2693 | break; | |
2694 | } | |
043405e1 CO |
2695 | default: |
2696 | r = -EINVAL; | |
2697 | } | |
2698 | out: | |
2699 | return r; | |
2700 | } | |
2701 | ||
f5f48ee1 SY |
2702 | static void wbinvd_ipi(void *garbage) |
2703 | { | |
2704 | wbinvd(); | |
2705 | } | |
2706 | ||
2707 | static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
2708 | { | |
e0f0bbc5 | 2709 | return kvm_arch_has_noncoherent_dma(vcpu->kvm); |
f5f48ee1 SY |
2710 | } |
2711 | ||
2860c4b1 PB |
2712 | static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) |
2713 | { | |
2714 | set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); | |
2715 | } | |
2716 | ||
313a3dc7 CO |
2717 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
2718 | { | |
f5f48ee1 SY |
2719 | /* Address WBINVD may be executed by guest */ |
2720 | if (need_emulate_wbinvd(vcpu)) { | |
2721 | if (kvm_x86_ops->has_wbinvd_exit()) | |
2722 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
2723 | else if (vcpu->cpu != -1 && vcpu->cpu != cpu) | |
2724 | smp_call_function_single(vcpu->cpu, | |
2725 | wbinvd_ipi, NULL, 1); | |
2726 | } | |
2727 | ||
313a3dc7 | 2728 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
8f6055cb | 2729 | |
0dd6a6ed ZA |
2730 | /* Apply any externally detected TSC adjustments (due to suspend) */ |
2731 | if (unlikely(vcpu->arch.tsc_offset_adjustment)) { | |
2732 | adjust_tsc_offset_host(vcpu, vcpu->arch.tsc_offset_adjustment); | |
2733 | vcpu->arch.tsc_offset_adjustment = 0; | |
105b21bb | 2734 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0dd6a6ed | 2735 | } |
8f6055cb | 2736 | |
48434c20 | 2737 | if (unlikely(vcpu->cpu != cpu) || check_tsc_unstable()) { |
6f526ec5 | 2738 | s64 tsc_delta = !vcpu->arch.last_host_tsc ? 0 : |
4ea1636b | 2739 | rdtsc() - vcpu->arch.last_host_tsc; |
e48672fa ZA |
2740 | if (tsc_delta < 0) |
2741 | mark_tsc_unstable("KVM discovered backwards TSC"); | |
c285545f | 2742 | if (check_tsc_unstable()) { |
07c1419a | 2743 | u64 offset = kvm_compute_tsc_offset(vcpu, |
b183aa58 ZA |
2744 | vcpu->arch.last_guest_tsc); |
2745 | kvm_x86_ops->write_tsc_offset(vcpu, offset); | |
c285545f | 2746 | vcpu->arch.tsc_catchup = 1; |
c285545f | 2747 | } |
d98d07ca MT |
2748 | /* |
2749 | * On a host with synchronized TSC, there is no need to update | |
2750 | * kvmclock on vcpu->cpu migration | |
2751 | */ | |
2752 | if (!vcpu->kvm->arch.use_master_clock || vcpu->cpu == -1) | |
0061d53d | 2753 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
c285545f ZA |
2754 | if (vcpu->cpu != cpu) |
2755 | kvm_migrate_timers(vcpu); | |
e48672fa | 2756 | vcpu->cpu = cpu; |
6b7d7e76 | 2757 | } |
c9aaa895 | 2758 | |
c9aaa895 | 2759 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); |
313a3dc7 CO |
2760 | } |
2761 | ||
2762 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
2763 | { | |
02daab21 | 2764 | kvm_x86_ops->vcpu_put(vcpu); |
1c11e713 | 2765 | kvm_put_guest_fpu(vcpu); |
4ea1636b | 2766 | vcpu->arch.last_host_tsc = rdtsc(); |
313a3dc7 CO |
2767 | } |
2768 | ||
313a3dc7 CO |
2769 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
2770 | struct kvm_lapic_state *s) | |
2771 | { | |
d62caabb AS |
2772 | if (vcpu->arch.apicv_active) |
2773 | kvm_x86_ops->sync_pir_to_irr(vcpu); | |
2774 | ||
ad312c7c | 2775 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
2776 | |
2777 | return 0; | |
2778 | } | |
2779 | ||
2780 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
2781 | struct kvm_lapic_state *s) | |
2782 | { | |
64eb0620 | 2783 | kvm_apic_post_state_restore(vcpu, s); |
cb142eb7 | 2784 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
2785 | |
2786 | return 0; | |
2787 | } | |
2788 | ||
127a457a MG |
2789 | static int kvm_cpu_accept_dm_intr(struct kvm_vcpu *vcpu) |
2790 | { | |
2791 | return (!lapic_in_kernel(vcpu) || | |
2792 | kvm_apic_accept_pic_intr(vcpu)); | |
2793 | } | |
2794 | ||
782d422b MG |
2795 | /* |
2796 | * if userspace requested an interrupt window, check that the | |
2797 | * interrupt window is open. | |
2798 | * | |
2799 | * No need to exit to userspace if we already have an interrupt queued. | |
2800 | */ | |
2801 | static int kvm_vcpu_ready_for_interrupt_injection(struct kvm_vcpu *vcpu) | |
2802 | { | |
2803 | return kvm_arch_interrupt_allowed(vcpu) && | |
2804 | !kvm_cpu_has_interrupt(vcpu) && | |
2805 | !kvm_event_needs_reinjection(vcpu) && | |
2806 | kvm_cpu_accept_dm_intr(vcpu); | |
2807 | } | |
2808 | ||
f77bc6a4 ZX |
2809 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2810 | struct kvm_interrupt *irq) | |
2811 | { | |
02cdb50f | 2812 | if (irq->irq >= KVM_NR_INTERRUPTS) |
f77bc6a4 | 2813 | return -EINVAL; |
1c1a9ce9 SR |
2814 | |
2815 | if (!irqchip_in_kernel(vcpu->kvm)) { | |
2816 | kvm_queue_interrupt(vcpu, irq->irq, false); | |
2817 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
2818 | return 0; | |
2819 | } | |
2820 | ||
2821 | /* | |
2822 | * With in-kernel LAPIC, we only use this to inject EXTINT, so | |
2823 | * fail for in-kernel 8259. | |
2824 | */ | |
2825 | if (pic_in_kernel(vcpu->kvm)) | |
f77bc6a4 | 2826 | return -ENXIO; |
f77bc6a4 | 2827 | |
1c1a9ce9 SR |
2828 | if (vcpu->arch.pending_external_vector != -1) |
2829 | return -EEXIST; | |
f77bc6a4 | 2830 | |
1c1a9ce9 | 2831 | vcpu->arch.pending_external_vector = irq->irq; |
934bf653 | 2832 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f77bc6a4 ZX |
2833 | return 0; |
2834 | } | |
2835 | ||
c4abb7c9 JK |
2836 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
2837 | { | |
c4abb7c9 | 2838 | kvm_inject_nmi(vcpu); |
c4abb7c9 JK |
2839 | |
2840 | return 0; | |
2841 | } | |
2842 | ||
f077825a PB |
2843 | static int kvm_vcpu_ioctl_smi(struct kvm_vcpu *vcpu) |
2844 | { | |
64d60670 PB |
2845 | kvm_make_request(KVM_REQ_SMI, vcpu); |
2846 | ||
f077825a PB |
2847 | return 0; |
2848 | } | |
2849 | ||
b209749f AK |
2850 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
2851 | struct kvm_tpr_access_ctl *tac) | |
2852 | { | |
2853 | if (tac->flags) | |
2854 | return -EINVAL; | |
2855 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
2856 | return 0; | |
2857 | } | |
2858 | ||
890ca9ae HY |
2859 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
2860 | u64 mcg_cap) | |
2861 | { | |
2862 | int r; | |
2863 | unsigned bank_num = mcg_cap & 0xff, bank; | |
2864 | ||
2865 | r = -EINVAL; | |
a9e38c3e | 2866 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae HY |
2867 | goto out; |
2868 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) | |
2869 | goto out; | |
2870 | r = 0; | |
2871 | vcpu->arch.mcg_cap = mcg_cap; | |
2872 | /* Init IA32_MCG_CTL to all 1s */ | |
2873 | if (mcg_cap & MCG_CTL_P) | |
2874 | vcpu->arch.mcg_ctl = ~(u64)0; | |
2875 | /* Init IA32_MCi_CTL to all 1s */ | |
2876 | for (bank = 0; bank < bank_num; bank++) | |
2877 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
2878 | out: | |
2879 | return r; | |
2880 | } | |
2881 | ||
2882 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
2883 | struct kvm_x86_mce *mce) | |
2884 | { | |
2885 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
2886 | unsigned bank_num = mcg_cap & 0xff; | |
2887 | u64 *banks = vcpu->arch.mce_banks; | |
2888 | ||
2889 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
2890 | return -EINVAL; | |
2891 | /* | |
2892 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
2893 | * reporting is disabled | |
2894 | */ | |
2895 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
2896 | vcpu->arch.mcg_ctl != ~(u64)0) | |
2897 | return 0; | |
2898 | banks += 4 * mce->bank; | |
2899 | /* | |
2900 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
2901 | * reporting is disabled for the bank | |
2902 | */ | |
2903 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
2904 | return 0; | |
2905 | if (mce->status & MCI_STATUS_UC) { | |
2906 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 2907 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
a8eeb04a | 2908 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
890ca9ae HY |
2909 | return 0; |
2910 | } | |
2911 | if (banks[1] & MCI_STATUS_VAL) | |
2912 | mce->status |= MCI_STATUS_OVER; | |
2913 | banks[2] = mce->addr; | |
2914 | banks[3] = mce->misc; | |
2915 | vcpu->arch.mcg_status = mce->mcg_status; | |
2916 | banks[1] = mce->status; | |
2917 | kvm_queue_exception(vcpu, MC_VECTOR); | |
2918 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
2919 | || !(banks[1] & MCI_STATUS_UC)) { | |
2920 | if (banks[1] & MCI_STATUS_VAL) | |
2921 | mce->status |= MCI_STATUS_OVER; | |
2922 | banks[2] = mce->addr; | |
2923 | banks[3] = mce->misc; | |
2924 | banks[1] = mce->status; | |
2925 | } else | |
2926 | banks[1] |= MCI_STATUS_OVER; | |
2927 | return 0; | |
2928 | } | |
2929 | ||
3cfc3092 JK |
2930 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
2931 | struct kvm_vcpu_events *events) | |
2932 | { | |
7460fb4a | 2933 | process_nmi(vcpu); |
03b82a30 JK |
2934 | events->exception.injected = |
2935 | vcpu->arch.exception.pending && | |
2936 | !kvm_exception_is_soft(vcpu->arch.exception.nr); | |
3cfc3092 JK |
2937 | events->exception.nr = vcpu->arch.exception.nr; |
2938 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
97e69aa6 | 2939 | events->exception.pad = 0; |
3cfc3092 JK |
2940 | events->exception.error_code = vcpu->arch.exception.error_code; |
2941 | ||
03b82a30 JK |
2942 | events->interrupt.injected = |
2943 | vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft; | |
3cfc3092 | 2944 | events->interrupt.nr = vcpu->arch.interrupt.nr; |
03b82a30 | 2945 | events->interrupt.soft = 0; |
37ccdcbe | 2946 | events->interrupt.shadow = kvm_x86_ops->get_interrupt_shadow(vcpu); |
3cfc3092 JK |
2947 | |
2948 | events->nmi.injected = vcpu->arch.nmi_injected; | |
7460fb4a | 2949 | events->nmi.pending = vcpu->arch.nmi_pending != 0; |
3cfc3092 | 2950 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); |
97e69aa6 | 2951 | events->nmi.pad = 0; |
3cfc3092 | 2952 | |
66450a21 | 2953 | events->sipi_vector = 0; /* never valid when reporting to user space */ |
3cfc3092 | 2954 | |
f077825a PB |
2955 | events->smi.smm = is_smm(vcpu); |
2956 | events->smi.pending = vcpu->arch.smi_pending; | |
2957 | events->smi.smm_inside_nmi = | |
2958 | !!(vcpu->arch.hflags & HF_SMM_INSIDE_NMI_MASK); | |
2959 | events->smi.latched_init = kvm_lapic_latched_init(vcpu); | |
2960 | ||
dab4b911 | 2961 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
f077825a PB |
2962 | | KVM_VCPUEVENT_VALID_SHADOW |
2963 | | KVM_VCPUEVENT_VALID_SMM); | |
97e69aa6 | 2964 | memset(&events->reserved, 0, sizeof(events->reserved)); |
3cfc3092 JK |
2965 | } |
2966 | ||
2967 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, | |
2968 | struct kvm_vcpu_events *events) | |
2969 | { | |
dab4b911 | 2970 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 | 2971 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
f077825a PB |
2972 | | KVM_VCPUEVENT_VALID_SHADOW |
2973 | | KVM_VCPUEVENT_VALID_SMM)) | |
3cfc3092 JK |
2974 | return -EINVAL; |
2975 | ||
78e546c8 PB |
2976 | if (events->exception.injected && |
2977 | (events->exception.nr > 31 || events->exception.nr == NMI_VECTOR)) | |
2978 | return -EINVAL; | |
2979 | ||
7460fb4a | 2980 | process_nmi(vcpu); |
3cfc3092 JK |
2981 | vcpu->arch.exception.pending = events->exception.injected; |
2982 | vcpu->arch.exception.nr = events->exception.nr; | |
2983 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
2984 | vcpu->arch.exception.error_code = events->exception.error_code; | |
2985 | ||
2986 | vcpu->arch.interrupt.pending = events->interrupt.injected; | |
2987 | vcpu->arch.interrupt.nr = events->interrupt.nr; | |
2988 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
48005f64 JK |
2989 | if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) |
2990 | kvm_x86_ops->set_interrupt_shadow(vcpu, | |
2991 | events->interrupt.shadow); | |
3cfc3092 JK |
2992 | |
2993 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
2994 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
2995 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
2996 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
2997 | ||
66450a21 | 2998 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR && |
bce87cce | 2999 | lapic_in_kernel(vcpu)) |
66450a21 | 3000 | vcpu->arch.apic->sipi_vector = events->sipi_vector; |
3cfc3092 | 3001 | |
f077825a PB |
3002 | if (events->flags & KVM_VCPUEVENT_VALID_SMM) { |
3003 | if (events->smi.smm) | |
3004 | vcpu->arch.hflags |= HF_SMM_MASK; | |
3005 | else | |
3006 | vcpu->arch.hflags &= ~HF_SMM_MASK; | |
3007 | vcpu->arch.smi_pending = events->smi.pending; | |
3008 | if (events->smi.smm_inside_nmi) | |
3009 | vcpu->arch.hflags |= HF_SMM_INSIDE_NMI_MASK; | |
3010 | else | |
3011 | vcpu->arch.hflags &= ~HF_SMM_INSIDE_NMI_MASK; | |
bce87cce | 3012 | if (lapic_in_kernel(vcpu)) { |
f077825a PB |
3013 | if (events->smi.latched_init) |
3014 | set_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); | |
3015 | else | |
3016 | clear_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); | |
3017 | } | |
3018 | } | |
3019 | ||
3842d135 AK |
3020 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
3021 | ||
3cfc3092 JK |
3022 | return 0; |
3023 | } | |
3024 | ||
a1efbe77 JK |
3025 | static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, |
3026 | struct kvm_debugregs *dbgregs) | |
3027 | { | |
73aaf249 JK |
3028 | unsigned long val; |
3029 | ||
a1efbe77 | 3030 | memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db)); |
16f8a6f9 | 3031 | kvm_get_dr(vcpu, 6, &val); |
73aaf249 | 3032 | dbgregs->dr6 = val; |
a1efbe77 JK |
3033 | dbgregs->dr7 = vcpu->arch.dr7; |
3034 | dbgregs->flags = 0; | |
97e69aa6 | 3035 | memset(&dbgregs->reserved, 0, sizeof(dbgregs->reserved)); |
a1efbe77 JK |
3036 | } |
3037 | ||
3038 | static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, | |
3039 | struct kvm_debugregs *dbgregs) | |
3040 | { | |
3041 | if (dbgregs->flags) | |
3042 | return -EINVAL; | |
3043 | ||
d14bdb55 PB |
3044 | if (dbgregs->dr6 & ~0xffffffffull) |
3045 | return -EINVAL; | |
3046 | if (dbgregs->dr7 & ~0xffffffffull) | |
3047 | return -EINVAL; | |
3048 | ||
a1efbe77 | 3049 | memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db)); |
ae561ede | 3050 | kvm_update_dr0123(vcpu); |
a1efbe77 | 3051 | vcpu->arch.dr6 = dbgregs->dr6; |
73aaf249 | 3052 | kvm_update_dr6(vcpu); |
a1efbe77 | 3053 | vcpu->arch.dr7 = dbgregs->dr7; |
9926c9fd | 3054 | kvm_update_dr7(vcpu); |
a1efbe77 | 3055 | |
a1efbe77 JK |
3056 | return 0; |
3057 | } | |
3058 | ||
df1daba7 PB |
3059 | #define XSTATE_COMPACTION_ENABLED (1ULL << 63) |
3060 | ||
3061 | static void fill_xsave(u8 *dest, struct kvm_vcpu *vcpu) | |
3062 | { | |
c47ada30 | 3063 | struct xregs_state *xsave = &vcpu->arch.guest_fpu.state.xsave; |
400e4b20 | 3064 | u64 xstate_bv = xsave->header.xfeatures; |
df1daba7 PB |
3065 | u64 valid; |
3066 | ||
3067 | /* | |
3068 | * Copy legacy XSAVE area, to avoid complications with CPUID | |
3069 | * leaves 0 and 1 in the loop below. | |
3070 | */ | |
3071 | memcpy(dest, xsave, XSAVE_HDR_OFFSET); | |
3072 | ||
3073 | /* Set XSTATE_BV */ | |
3074 | *(u64 *)(dest + XSAVE_HDR_OFFSET) = xstate_bv; | |
3075 | ||
3076 | /* | |
3077 | * Copy each region from the possibly compacted offset to the | |
3078 | * non-compacted offset. | |
3079 | */ | |
d91cab78 | 3080 | valid = xstate_bv & ~XFEATURE_MASK_FPSSE; |
df1daba7 PB |
3081 | while (valid) { |
3082 | u64 feature = valid & -valid; | |
3083 | int index = fls64(feature) - 1; | |
3084 | void *src = get_xsave_addr(xsave, feature); | |
3085 | ||
3086 | if (src) { | |
3087 | u32 size, offset, ecx, edx; | |
3088 | cpuid_count(XSTATE_CPUID, index, | |
3089 | &size, &offset, &ecx, &edx); | |
3090 | memcpy(dest + offset, src, size); | |
3091 | } | |
3092 | ||
3093 | valid -= feature; | |
3094 | } | |
3095 | } | |
3096 | ||
3097 | static void load_xsave(struct kvm_vcpu *vcpu, u8 *src) | |
3098 | { | |
c47ada30 | 3099 | struct xregs_state *xsave = &vcpu->arch.guest_fpu.state.xsave; |
df1daba7 PB |
3100 | u64 xstate_bv = *(u64 *)(src + XSAVE_HDR_OFFSET); |
3101 | u64 valid; | |
3102 | ||
3103 | /* | |
3104 | * Copy legacy XSAVE area, to avoid complications with CPUID | |
3105 | * leaves 0 and 1 in the loop below. | |
3106 | */ | |
3107 | memcpy(xsave, src, XSAVE_HDR_OFFSET); | |
3108 | ||
3109 | /* Set XSTATE_BV and possibly XCOMP_BV. */ | |
400e4b20 | 3110 | xsave->header.xfeatures = xstate_bv; |
782511b0 | 3111 | if (boot_cpu_has(X86_FEATURE_XSAVES)) |
3a54450b | 3112 | xsave->header.xcomp_bv = host_xcr0 | XSTATE_COMPACTION_ENABLED; |
df1daba7 PB |
3113 | |
3114 | /* | |
3115 | * Copy each region from the non-compacted offset to the | |
3116 | * possibly compacted offset. | |
3117 | */ | |
d91cab78 | 3118 | valid = xstate_bv & ~XFEATURE_MASK_FPSSE; |
df1daba7 PB |
3119 | while (valid) { |
3120 | u64 feature = valid & -valid; | |
3121 | int index = fls64(feature) - 1; | |
3122 | void *dest = get_xsave_addr(xsave, feature); | |
3123 | ||
3124 | if (dest) { | |
3125 | u32 size, offset, ecx, edx; | |
3126 | cpuid_count(XSTATE_CPUID, index, | |
3127 | &size, &offset, &ecx, &edx); | |
3128 | memcpy(dest, src + offset, size); | |
ee4100da | 3129 | } |
df1daba7 PB |
3130 | |
3131 | valid -= feature; | |
3132 | } | |
3133 | } | |
3134 | ||
2d5b5a66 SY |
3135 | static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu, |
3136 | struct kvm_xsave *guest_xsave) | |
3137 | { | |
d366bf7e | 3138 | if (boot_cpu_has(X86_FEATURE_XSAVE)) { |
df1daba7 PB |
3139 | memset(guest_xsave, 0, sizeof(struct kvm_xsave)); |
3140 | fill_xsave((u8 *) guest_xsave->region, vcpu); | |
4344ee98 | 3141 | } else { |
2d5b5a66 | 3142 | memcpy(guest_xsave->region, |
7366ed77 | 3143 | &vcpu->arch.guest_fpu.state.fxsave, |
c47ada30 | 3144 | sizeof(struct fxregs_state)); |
2d5b5a66 | 3145 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] = |
d91cab78 | 3146 | XFEATURE_MASK_FPSSE; |
2d5b5a66 SY |
3147 | } |
3148 | } | |
3149 | ||
3150 | static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu, | |
3151 | struct kvm_xsave *guest_xsave) | |
3152 | { | |
3153 | u64 xstate_bv = | |
3154 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)]; | |
3155 | ||
d366bf7e | 3156 | if (boot_cpu_has(X86_FEATURE_XSAVE)) { |
d7876f1b PB |
3157 | /* |
3158 | * Here we allow setting states that are not present in | |
3159 | * CPUID leaf 0xD, index 0, EDX:EAX. This is for compatibility | |
3160 | * with old userspace. | |
3161 | */ | |
4ff41732 | 3162 | if (xstate_bv & ~kvm_supported_xcr0()) |
d7876f1b | 3163 | return -EINVAL; |
df1daba7 | 3164 | load_xsave(vcpu, (u8 *)guest_xsave->region); |
d7876f1b | 3165 | } else { |
d91cab78 | 3166 | if (xstate_bv & ~XFEATURE_MASK_FPSSE) |
2d5b5a66 | 3167 | return -EINVAL; |
7366ed77 | 3168 | memcpy(&vcpu->arch.guest_fpu.state.fxsave, |
c47ada30 | 3169 | guest_xsave->region, sizeof(struct fxregs_state)); |
2d5b5a66 SY |
3170 | } |
3171 | return 0; | |
3172 | } | |
3173 | ||
3174 | static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu, | |
3175 | struct kvm_xcrs *guest_xcrs) | |
3176 | { | |
d366bf7e | 3177 | if (!boot_cpu_has(X86_FEATURE_XSAVE)) { |
2d5b5a66 SY |
3178 | guest_xcrs->nr_xcrs = 0; |
3179 | return; | |
3180 | } | |
3181 | ||
3182 | guest_xcrs->nr_xcrs = 1; | |
3183 | guest_xcrs->flags = 0; | |
3184 | guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK; | |
3185 | guest_xcrs->xcrs[0].value = vcpu->arch.xcr0; | |
3186 | } | |
3187 | ||
3188 | static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu, | |
3189 | struct kvm_xcrs *guest_xcrs) | |
3190 | { | |
3191 | int i, r = 0; | |
3192 | ||
d366bf7e | 3193 | if (!boot_cpu_has(X86_FEATURE_XSAVE)) |
2d5b5a66 SY |
3194 | return -EINVAL; |
3195 | ||
3196 | if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags) | |
3197 | return -EINVAL; | |
3198 | ||
3199 | for (i = 0; i < guest_xcrs->nr_xcrs; i++) | |
3200 | /* Only support XCR0 currently */ | |
c67a04cb | 3201 | if (guest_xcrs->xcrs[i].xcr == XCR_XFEATURE_ENABLED_MASK) { |
2d5b5a66 | 3202 | r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK, |
c67a04cb | 3203 | guest_xcrs->xcrs[i].value); |
2d5b5a66 SY |
3204 | break; |
3205 | } | |
3206 | if (r) | |
3207 | r = -EINVAL; | |
3208 | return r; | |
3209 | } | |
3210 | ||
1c0b28c2 EM |
3211 | /* |
3212 | * kvm_set_guest_paused() indicates to the guest kernel that it has been | |
3213 | * stopped by the hypervisor. This function will be called from the host only. | |
3214 | * EINVAL is returned when the host attempts to set the flag for a guest that | |
3215 | * does not support pv clocks. | |
3216 | */ | |
3217 | static int kvm_set_guest_paused(struct kvm_vcpu *vcpu) | |
3218 | { | |
0b79459b | 3219 | if (!vcpu->arch.pv_time_enabled) |
1c0b28c2 | 3220 | return -EINVAL; |
51d59c6b | 3221 | vcpu->arch.pvclock_set_guest_stopped_request = true; |
1c0b28c2 EM |
3222 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
3223 | return 0; | |
3224 | } | |
3225 | ||
5c919412 AS |
3226 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
3227 | struct kvm_enable_cap *cap) | |
3228 | { | |
3229 | if (cap->flags) | |
3230 | return -EINVAL; | |
3231 | ||
3232 | switch (cap->cap) { | |
3233 | case KVM_CAP_HYPERV_SYNIC: | |
3234 | return kvm_hv_activate_synic(vcpu); | |
3235 | default: | |
3236 | return -EINVAL; | |
3237 | } | |
3238 | } | |
3239 | ||
313a3dc7 CO |
3240 | long kvm_arch_vcpu_ioctl(struct file *filp, |
3241 | unsigned int ioctl, unsigned long arg) | |
3242 | { | |
3243 | struct kvm_vcpu *vcpu = filp->private_data; | |
3244 | void __user *argp = (void __user *)arg; | |
3245 | int r; | |
d1ac91d8 AK |
3246 | union { |
3247 | struct kvm_lapic_state *lapic; | |
3248 | struct kvm_xsave *xsave; | |
3249 | struct kvm_xcrs *xcrs; | |
3250 | void *buffer; | |
3251 | } u; | |
3252 | ||
3253 | u.buffer = NULL; | |
313a3dc7 CO |
3254 | switch (ioctl) { |
3255 | case KVM_GET_LAPIC: { | |
2204ae3c | 3256 | r = -EINVAL; |
bce87cce | 3257 | if (!lapic_in_kernel(vcpu)) |
2204ae3c | 3258 | goto out; |
d1ac91d8 | 3259 | u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 3260 | |
b772ff36 | 3261 | r = -ENOMEM; |
d1ac91d8 | 3262 | if (!u.lapic) |
b772ff36 | 3263 | goto out; |
d1ac91d8 | 3264 | r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3265 | if (r) |
3266 | goto out; | |
3267 | r = -EFAULT; | |
d1ac91d8 | 3268 | if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
3269 | goto out; |
3270 | r = 0; | |
3271 | break; | |
3272 | } | |
3273 | case KVM_SET_LAPIC: { | |
2204ae3c | 3274 | r = -EINVAL; |
bce87cce | 3275 | if (!lapic_in_kernel(vcpu)) |
2204ae3c | 3276 | goto out; |
ff5c2c03 | 3277 | u.lapic = memdup_user(argp, sizeof(*u.lapic)); |
18595411 GC |
3278 | if (IS_ERR(u.lapic)) |
3279 | return PTR_ERR(u.lapic); | |
ff5c2c03 | 3280 | |
d1ac91d8 | 3281 | r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3282 | break; |
3283 | } | |
f77bc6a4 ZX |
3284 | case KVM_INTERRUPT: { |
3285 | struct kvm_interrupt irq; | |
3286 | ||
3287 | r = -EFAULT; | |
3288 | if (copy_from_user(&irq, argp, sizeof irq)) | |
3289 | goto out; | |
3290 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
f77bc6a4 ZX |
3291 | break; |
3292 | } | |
c4abb7c9 JK |
3293 | case KVM_NMI: { |
3294 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
c4abb7c9 JK |
3295 | break; |
3296 | } | |
f077825a PB |
3297 | case KVM_SMI: { |
3298 | r = kvm_vcpu_ioctl_smi(vcpu); | |
3299 | break; | |
3300 | } | |
313a3dc7 CO |
3301 | case KVM_SET_CPUID: { |
3302 | struct kvm_cpuid __user *cpuid_arg = argp; | |
3303 | struct kvm_cpuid cpuid; | |
3304 | ||
3305 | r = -EFAULT; | |
3306 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3307 | goto out; | |
3308 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
313a3dc7 CO |
3309 | break; |
3310 | } | |
07716717 DK |
3311 | case KVM_SET_CPUID2: { |
3312 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3313 | struct kvm_cpuid2 cpuid; | |
3314 | ||
3315 | r = -EFAULT; | |
3316 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3317 | goto out; | |
3318 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 3319 | cpuid_arg->entries); |
07716717 DK |
3320 | break; |
3321 | } | |
3322 | case KVM_GET_CPUID2: { | |
3323 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3324 | struct kvm_cpuid2 cpuid; | |
3325 | ||
3326 | r = -EFAULT; | |
3327 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3328 | goto out; | |
3329 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 3330 | cpuid_arg->entries); |
07716717 DK |
3331 | if (r) |
3332 | goto out; | |
3333 | r = -EFAULT; | |
3334 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
3335 | goto out; | |
3336 | r = 0; | |
3337 | break; | |
3338 | } | |
313a3dc7 | 3339 | case KVM_GET_MSRS: |
609e36d3 | 3340 | r = msr_io(vcpu, argp, do_get_msr, 1); |
313a3dc7 CO |
3341 | break; |
3342 | case KVM_SET_MSRS: | |
3343 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
3344 | break; | |
b209749f AK |
3345 | case KVM_TPR_ACCESS_REPORTING: { |
3346 | struct kvm_tpr_access_ctl tac; | |
3347 | ||
3348 | r = -EFAULT; | |
3349 | if (copy_from_user(&tac, argp, sizeof tac)) | |
3350 | goto out; | |
3351 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
3352 | if (r) | |
3353 | goto out; | |
3354 | r = -EFAULT; | |
3355 | if (copy_to_user(argp, &tac, sizeof tac)) | |
3356 | goto out; | |
3357 | r = 0; | |
3358 | break; | |
3359 | }; | |
b93463aa AK |
3360 | case KVM_SET_VAPIC_ADDR: { |
3361 | struct kvm_vapic_addr va; | |
3362 | ||
3363 | r = -EINVAL; | |
35754c98 | 3364 | if (!lapic_in_kernel(vcpu)) |
b93463aa AK |
3365 | goto out; |
3366 | r = -EFAULT; | |
3367 | if (copy_from_user(&va, argp, sizeof va)) | |
3368 | goto out; | |
fda4e2e8 | 3369 | r = kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); |
b93463aa AK |
3370 | break; |
3371 | } | |
890ca9ae HY |
3372 | case KVM_X86_SETUP_MCE: { |
3373 | u64 mcg_cap; | |
3374 | ||
3375 | r = -EFAULT; | |
3376 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
3377 | goto out; | |
3378 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
3379 | break; | |
3380 | } | |
3381 | case KVM_X86_SET_MCE: { | |
3382 | struct kvm_x86_mce mce; | |
3383 | ||
3384 | r = -EFAULT; | |
3385 | if (copy_from_user(&mce, argp, sizeof mce)) | |
3386 | goto out; | |
3387 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
3388 | break; | |
3389 | } | |
3cfc3092 JK |
3390 | case KVM_GET_VCPU_EVENTS: { |
3391 | struct kvm_vcpu_events events; | |
3392 | ||
3393 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
3394 | ||
3395 | r = -EFAULT; | |
3396 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
3397 | break; | |
3398 | r = 0; | |
3399 | break; | |
3400 | } | |
3401 | case KVM_SET_VCPU_EVENTS: { | |
3402 | struct kvm_vcpu_events events; | |
3403 | ||
3404 | r = -EFAULT; | |
3405 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
3406 | break; | |
3407 | ||
3408 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
3409 | break; | |
3410 | } | |
a1efbe77 JK |
3411 | case KVM_GET_DEBUGREGS: { |
3412 | struct kvm_debugregs dbgregs; | |
3413 | ||
3414 | kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs); | |
3415 | ||
3416 | r = -EFAULT; | |
3417 | if (copy_to_user(argp, &dbgregs, | |
3418 | sizeof(struct kvm_debugregs))) | |
3419 | break; | |
3420 | r = 0; | |
3421 | break; | |
3422 | } | |
3423 | case KVM_SET_DEBUGREGS: { | |
3424 | struct kvm_debugregs dbgregs; | |
3425 | ||
3426 | r = -EFAULT; | |
3427 | if (copy_from_user(&dbgregs, argp, | |
3428 | sizeof(struct kvm_debugregs))) | |
3429 | break; | |
3430 | ||
3431 | r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs); | |
3432 | break; | |
3433 | } | |
2d5b5a66 | 3434 | case KVM_GET_XSAVE: { |
d1ac91d8 | 3435 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 3436 | r = -ENOMEM; |
d1ac91d8 | 3437 | if (!u.xsave) |
2d5b5a66 SY |
3438 | break; |
3439 | ||
d1ac91d8 | 3440 | kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3441 | |
3442 | r = -EFAULT; | |
d1ac91d8 | 3443 | if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
3444 | break; |
3445 | r = 0; | |
3446 | break; | |
3447 | } | |
3448 | case KVM_SET_XSAVE: { | |
ff5c2c03 | 3449 | u.xsave = memdup_user(argp, sizeof(*u.xsave)); |
18595411 GC |
3450 | if (IS_ERR(u.xsave)) |
3451 | return PTR_ERR(u.xsave); | |
2d5b5a66 | 3452 | |
d1ac91d8 | 3453 | r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3454 | break; |
3455 | } | |
3456 | case KVM_GET_XCRS: { | |
d1ac91d8 | 3457 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 3458 | r = -ENOMEM; |
d1ac91d8 | 3459 | if (!u.xcrs) |
2d5b5a66 SY |
3460 | break; |
3461 | ||
d1ac91d8 | 3462 | kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3463 | |
3464 | r = -EFAULT; | |
d1ac91d8 | 3465 | if (copy_to_user(argp, u.xcrs, |
2d5b5a66 SY |
3466 | sizeof(struct kvm_xcrs))) |
3467 | break; | |
3468 | r = 0; | |
3469 | break; | |
3470 | } | |
3471 | case KVM_SET_XCRS: { | |
ff5c2c03 | 3472 | u.xcrs = memdup_user(argp, sizeof(*u.xcrs)); |
18595411 GC |
3473 | if (IS_ERR(u.xcrs)) |
3474 | return PTR_ERR(u.xcrs); | |
2d5b5a66 | 3475 | |
d1ac91d8 | 3476 | r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3477 | break; |
3478 | } | |
92a1f12d JR |
3479 | case KVM_SET_TSC_KHZ: { |
3480 | u32 user_tsc_khz; | |
3481 | ||
3482 | r = -EINVAL; | |
92a1f12d JR |
3483 | user_tsc_khz = (u32)arg; |
3484 | ||
3485 | if (user_tsc_khz >= kvm_max_guest_tsc_khz) | |
3486 | goto out; | |
3487 | ||
cc578287 ZA |
3488 | if (user_tsc_khz == 0) |
3489 | user_tsc_khz = tsc_khz; | |
3490 | ||
381d585c HZ |
3491 | if (!kvm_set_tsc_khz(vcpu, user_tsc_khz)) |
3492 | r = 0; | |
92a1f12d | 3493 | |
92a1f12d JR |
3494 | goto out; |
3495 | } | |
3496 | case KVM_GET_TSC_KHZ: { | |
cc578287 | 3497 | r = vcpu->arch.virtual_tsc_khz; |
92a1f12d JR |
3498 | goto out; |
3499 | } | |
1c0b28c2 EM |
3500 | case KVM_KVMCLOCK_CTRL: { |
3501 | r = kvm_set_guest_paused(vcpu); | |
3502 | goto out; | |
3503 | } | |
5c919412 AS |
3504 | case KVM_ENABLE_CAP: { |
3505 | struct kvm_enable_cap cap; | |
3506 | ||
3507 | r = -EFAULT; | |
3508 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
3509 | goto out; | |
3510 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
3511 | break; | |
3512 | } | |
313a3dc7 CO |
3513 | default: |
3514 | r = -EINVAL; | |
3515 | } | |
3516 | out: | |
d1ac91d8 | 3517 | kfree(u.buffer); |
313a3dc7 CO |
3518 | return r; |
3519 | } | |
3520 | ||
5b1c1493 CO |
3521 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
3522 | { | |
3523 | return VM_FAULT_SIGBUS; | |
3524 | } | |
3525 | ||
1fe779f8 CO |
3526 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
3527 | { | |
3528 | int ret; | |
3529 | ||
3530 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
951179ce | 3531 | return -EINVAL; |
1fe779f8 CO |
3532 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); |
3533 | return ret; | |
3534 | } | |
3535 | ||
b927a3ce SY |
3536 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
3537 | u64 ident_addr) | |
3538 | { | |
3539 | kvm->arch.ept_identity_map_addr = ident_addr; | |
3540 | return 0; | |
3541 | } | |
3542 | ||
1fe779f8 CO |
3543 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
3544 | u32 kvm_nr_mmu_pages) | |
3545 | { | |
3546 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
3547 | return -EINVAL; | |
3548 | ||
79fac95e | 3549 | mutex_lock(&kvm->slots_lock); |
1fe779f8 CO |
3550 | |
3551 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 3552 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 3553 | |
79fac95e | 3554 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
3555 | return 0; |
3556 | } | |
3557 | ||
3558 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
3559 | { | |
39de71ec | 3560 | return kvm->arch.n_max_mmu_pages; |
1fe779f8 CO |
3561 | } |
3562 | ||
1fe779f8 CO |
3563 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
3564 | { | |
3565 | int r; | |
3566 | ||
3567 | r = 0; | |
3568 | switch (chip->chip_id) { | |
3569 | case KVM_IRQCHIP_PIC_MASTER: | |
3570 | memcpy(&chip->chip.pic, | |
3571 | &pic_irqchip(kvm)->pics[0], | |
3572 | sizeof(struct kvm_pic_state)); | |
3573 | break; | |
3574 | case KVM_IRQCHIP_PIC_SLAVE: | |
3575 | memcpy(&chip->chip.pic, | |
3576 | &pic_irqchip(kvm)->pics[1], | |
3577 | sizeof(struct kvm_pic_state)); | |
3578 | break; | |
3579 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 3580 | r = kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3581 | break; |
3582 | default: | |
3583 | r = -EINVAL; | |
3584 | break; | |
3585 | } | |
3586 | return r; | |
3587 | } | |
3588 | ||
3589 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
3590 | { | |
3591 | int r; | |
3592 | ||
3593 | r = 0; | |
3594 | switch (chip->chip_id) { | |
3595 | case KVM_IRQCHIP_PIC_MASTER: | |
f4f51050 | 3596 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3597 | memcpy(&pic_irqchip(kvm)->pics[0], |
3598 | &chip->chip.pic, | |
3599 | sizeof(struct kvm_pic_state)); | |
f4f51050 | 3600 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3601 | break; |
3602 | case KVM_IRQCHIP_PIC_SLAVE: | |
f4f51050 | 3603 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3604 | memcpy(&pic_irqchip(kvm)->pics[1], |
3605 | &chip->chip.pic, | |
3606 | sizeof(struct kvm_pic_state)); | |
f4f51050 | 3607 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3608 | break; |
3609 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 3610 | r = kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3611 | break; |
3612 | default: | |
3613 | r = -EINVAL; | |
3614 | break; | |
3615 | } | |
3616 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
3617 | return r; | |
3618 | } | |
3619 | ||
e0f63cb9 SY |
3620 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
3621 | { | |
34f3941c RK |
3622 | struct kvm_kpit_state *kps = &kvm->arch.vpit->pit_state; |
3623 | ||
3624 | BUILD_BUG_ON(sizeof(*ps) != sizeof(kps->channels)); | |
3625 | ||
3626 | mutex_lock(&kps->lock); | |
3627 | memcpy(ps, &kps->channels, sizeof(*ps)); | |
3628 | mutex_unlock(&kps->lock); | |
2da29bcc | 3629 | return 0; |
e0f63cb9 SY |
3630 | } |
3631 | ||
3632 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
3633 | { | |
0185604c | 3634 | int i; |
09edea72 RK |
3635 | struct kvm_pit *pit = kvm->arch.vpit; |
3636 | ||
3637 | mutex_lock(&pit->pit_state.lock); | |
34f3941c | 3638 | memcpy(&pit->pit_state.channels, ps, sizeof(*ps)); |
0185604c | 3639 | for (i = 0; i < 3; i++) |
09edea72 RK |
3640 | kvm_pit_load_count(pit, i, ps->channels[i].count, 0); |
3641 | mutex_unlock(&pit->pit_state.lock); | |
2da29bcc | 3642 | return 0; |
e9f42757 BK |
3643 | } |
3644 | ||
3645 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3646 | { | |
e9f42757 BK |
3647 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
3648 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
3649 | sizeof(ps->channels)); | |
3650 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
3651 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
97e69aa6 | 3652 | memset(&ps->reserved, 0, sizeof(ps->reserved)); |
2da29bcc | 3653 | return 0; |
e9f42757 BK |
3654 | } |
3655 | ||
3656 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3657 | { | |
2da29bcc | 3658 | int start = 0; |
0185604c | 3659 | int i; |
e9f42757 | 3660 | u32 prev_legacy, cur_legacy; |
09edea72 RK |
3661 | struct kvm_pit *pit = kvm->arch.vpit; |
3662 | ||
3663 | mutex_lock(&pit->pit_state.lock); | |
3664 | prev_legacy = pit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
e9f42757 BK |
3665 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; |
3666 | if (!prev_legacy && cur_legacy) | |
3667 | start = 1; | |
09edea72 RK |
3668 | memcpy(&pit->pit_state.channels, &ps->channels, |
3669 | sizeof(pit->pit_state.channels)); | |
3670 | pit->pit_state.flags = ps->flags; | |
0185604c | 3671 | for (i = 0; i < 3; i++) |
09edea72 | 3672 | kvm_pit_load_count(pit, i, pit->pit_state.channels[i].count, |
e5e57e7a | 3673 | start && i == 0); |
09edea72 | 3674 | mutex_unlock(&pit->pit_state.lock); |
2da29bcc | 3675 | return 0; |
e0f63cb9 SY |
3676 | } |
3677 | ||
52d939a0 MT |
3678 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
3679 | struct kvm_reinject_control *control) | |
3680 | { | |
71474e2f RK |
3681 | struct kvm_pit *pit = kvm->arch.vpit; |
3682 | ||
3683 | if (!pit) | |
52d939a0 | 3684 | return -ENXIO; |
b39c90b6 | 3685 | |
71474e2f RK |
3686 | /* pit->pit_state.lock was overloaded to prevent userspace from getting |
3687 | * an inconsistent state after running multiple KVM_REINJECT_CONTROL | |
3688 | * ioctls in parallel. Use a separate lock if that ioctl isn't rare. | |
3689 | */ | |
3690 | mutex_lock(&pit->pit_state.lock); | |
3691 | kvm_pit_set_reinject(pit, control->pit_reinject); | |
3692 | mutex_unlock(&pit->pit_state.lock); | |
b39c90b6 | 3693 | |
52d939a0 MT |
3694 | return 0; |
3695 | } | |
3696 | ||
95d4c16c | 3697 | /** |
60c34612 TY |
3698 | * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot |
3699 | * @kvm: kvm instance | |
3700 | * @log: slot id and address to which we copy the log | |
95d4c16c | 3701 | * |
e108ff2f PB |
3702 | * Steps 1-4 below provide general overview of dirty page logging. See |
3703 | * kvm_get_dirty_log_protect() function description for additional details. | |
3704 | * | |
3705 | * We call kvm_get_dirty_log_protect() to handle steps 1-3, upon return we | |
3706 | * always flush the TLB (step 4) even if previous step failed and the dirty | |
3707 | * bitmap may be corrupt. Regardless of previous outcome the KVM logging API | |
3708 | * does not preclude user space subsequent dirty log read. Flushing TLB ensures | |
3709 | * writes will be marked dirty for next log read. | |
95d4c16c | 3710 | * |
60c34612 TY |
3711 | * 1. Take a snapshot of the bit and clear it if needed. |
3712 | * 2. Write protect the corresponding page. | |
e108ff2f PB |
3713 | * 3. Copy the snapshot to the userspace. |
3714 | * 4. Flush TLB's if needed. | |
5bb064dc | 3715 | */ |
60c34612 | 3716 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
5bb064dc | 3717 | { |
60c34612 | 3718 | bool is_dirty = false; |
e108ff2f | 3719 | int r; |
5bb064dc | 3720 | |
79fac95e | 3721 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 3722 | |
88178fd4 KH |
3723 | /* |
3724 | * Flush potentially hardware-cached dirty pages to dirty_bitmap. | |
3725 | */ | |
3726 | if (kvm_x86_ops->flush_log_dirty) | |
3727 | kvm_x86_ops->flush_log_dirty(kvm); | |
3728 | ||
e108ff2f | 3729 | r = kvm_get_dirty_log_protect(kvm, log, &is_dirty); |
198c74f4 XG |
3730 | |
3731 | /* | |
3732 | * All the TLBs can be flushed out of mmu lock, see the comments in | |
3733 | * kvm_mmu_slot_remove_write_access(). | |
3734 | */ | |
e108ff2f | 3735 | lockdep_assert_held(&kvm->slots_lock); |
198c74f4 XG |
3736 | if (is_dirty) |
3737 | kvm_flush_remote_tlbs(kvm); | |
3738 | ||
79fac95e | 3739 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
3740 | return r; |
3741 | } | |
3742 | ||
aa2fbe6d YZ |
3743 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, |
3744 | bool line_status) | |
23d43cf9 CD |
3745 | { |
3746 | if (!irqchip_in_kernel(kvm)) | |
3747 | return -ENXIO; | |
3748 | ||
3749 | irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, | |
aa2fbe6d YZ |
3750 | irq_event->irq, irq_event->level, |
3751 | line_status); | |
23d43cf9 CD |
3752 | return 0; |
3753 | } | |
3754 | ||
90de4a18 NA |
3755 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, |
3756 | struct kvm_enable_cap *cap) | |
3757 | { | |
3758 | int r; | |
3759 | ||
3760 | if (cap->flags) | |
3761 | return -EINVAL; | |
3762 | ||
3763 | switch (cap->cap) { | |
3764 | case KVM_CAP_DISABLE_QUIRKS: | |
3765 | kvm->arch.disabled_quirks = cap->args[0]; | |
3766 | r = 0; | |
3767 | break; | |
49df6397 SR |
3768 | case KVM_CAP_SPLIT_IRQCHIP: { |
3769 | mutex_lock(&kvm->lock); | |
b053b2ae SR |
3770 | r = -EINVAL; |
3771 | if (cap->args[0] > MAX_NR_RESERVED_IOAPIC_PINS) | |
3772 | goto split_irqchip_unlock; | |
49df6397 SR |
3773 | r = -EEXIST; |
3774 | if (irqchip_in_kernel(kvm)) | |
3775 | goto split_irqchip_unlock; | |
3776 | if (atomic_read(&kvm->online_vcpus)) | |
3777 | goto split_irqchip_unlock; | |
3778 | r = kvm_setup_empty_irq_routing(kvm); | |
3779 | if (r) | |
3780 | goto split_irqchip_unlock; | |
3781 | /* Pairs with irqchip_in_kernel. */ | |
3782 | smp_wmb(); | |
3783 | kvm->arch.irqchip_split = true; | |
b053b2ae | 3784 | kvm->arch.nr_reserved_ioapic_pins = cap->args[0]; |
49df6397 SR |
3785 | r = 0; |
3786 | split_irqchip_unlock: | |
3787 | mutex_unlock(&kvm->lock); | |
3788 | break; | |
3789 | } | |
90de4a18 NA |
3790 | default: |
3791 | r = -EINVAL; | |
3792 | break; | |
3793 | } | |
3794 | return r; | |
3795 | } | |
3796 | ||
1fe779f8 CO |
3797 | long kvm_arch_vm_ioctl(struct file *filp, |
3798 | unsigned int ioctl, unsigned long arg) | |
3799 | { | |
3800 | struct kvm *kvm = filp->private_data; | |
3801 | void __user *argp = (void __user *)arg; | |
367e1319 | 3802 | int r = -ENOTTY; |
f0d66275 DH |
3803 | /* |
3804 | * This union makes it completely explicit to gcc-3.x | |
3805 | * that these two variables' stack usage should be | |
3806 | * combined, not added together. | |
3807 | */ | |
3808 | union { | |
3809 | struct kvm_pit_state ps; | |
e9f42757 | 3810 | struct kvm_pit_state2 ps2; |
c5ff41ce | 3811 | struct kvm_pit_config pit_config; |
f0d66275 | 3812 | } u; |
1fe779f8 CO |
3813 | |
3814 | switch (ioctl) { | |
3815 | case KVM_SET_TSS_ADDR: | |
3816 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
1fe779f8 | 3817 | break; |
b927a3ce SY |
3818 | case KVM_SET_IDENTITY_MAP_ADDR: { |
3819 | u64 ident_addr; | |
3820 | ||
3821 | r = -EFAULT; | |
3822 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
3823 | goto out; | |
3824 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); | |
b927a3ce SY |
3825 | break; |
3826 | } | |
1fe779f8 CO |
3827 | case KVM_SET_NR_MMU_PAGES: |
3828 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
1fe779f8 CO |
3829 | break; |
3830 | case KVM_GET_NR_MMU_PAGES: | |
3831 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
3832 | break; | |
3ddea128 MT |
3833 | case KVM_CREATE_IRQCHIP: { |
3834 | struct kvm_pic *vpic; | |
3835 | ||
3836 | mutex_lock(&kvm->lock); | |
3837 | r = -EEXIST; | |
3838 | if (kvm->arch.vpic) | |
3839 | goto create_irqchip_unlock; | |
3e515705 AK |
3840 | r = -EINVAL; |
3841 | if (atomic_read(&kvm->online_vcpus)) | |
3842 | goto create_irqchip_unlock; | |
1fe779f8 | 3843 | r = -ENOMEM; |
3ddea128 MT |
3844 | vpic = kvm_create_pic(kvm); |
3845 | if (vpic) { | |
1fe779f8 CO |
3846 | r = kvm_ioapic_init(kvm); |
3847 | if (r) { | |
175504cd | 3848 | mutex_lock(&kvm->slots_lock); |
71ba994c | 3849 | kvm_destroy_pic(vpic); |
175504cd | 3850 | mutex_unlock(&kvm->slots_lock); |
3ddea128 | 3851 | goto create_irqchip_unlock; |
1fe779f8 CO |
3852 | } |
3853 | } else | |
3ddea128 | 3854 | goto create_irqchip_unlock; |
399ec807 AK |
3855 | r = kvm_setup_default_irq_routing(kvm); |
3856 | if (r) { | |
175504cd | 3857 | mutex_lock(&kvm->slots_lock); |
3ddea128 | 3858 | mutex_lock(&kvm->irq_lock); |
72bb2fcd | 3859 | kvm_ioapic_destroy(kvm); |
71ba994c | 3860 | kvm_destroy_pic(vpic); |
3ddea128 | 3861 | mutex_unlock(&kvm->irq_lock); |
175504cd | 3862 | mutex_unlock(&kvm->slots_lock); |
71ba994c | 3863 | goto create_irqchip_unlock; |
399ec807 | 3864 | } |
71ba994c PB |
3865 | /* Write kvm->irq_routing before kvm->arch.vpic. */ |
3866 | smp_wmb(); | |
3867 | kvm->arch.vpic = vpic; | |
3ddea128 MT |
3868 | create_irqchip_unlock: |
3869 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 3870 | break; |
3ddea128 | 3871 | } |
7837699f | 3872 | case KVM_CREATE_PIT: |
c5ff41ce JK |
3873 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
3874 | goto create_pit; | |
3875 | case KVM_CREATE_PIT2: | |
3876 | r = -EFAULT; | |
3877 | if (copy_from_user(&u.pit_config, argp, | |
3878 | sizeof(struct kvm_pit_config))) | |
3879 | goto out; | |
3880 | create_pit: | |
79fac95e | 3881 | mutex_lock(&kvm->slots_lock); |
269e05e4 AK |
3882 | r = -EEXIST; |
3883 | if (kvm->arch.vpit) | |
3884 | goto create_pit_unlock; | |
7837699f | 3885 | r = -ENOMEM; |
c5ff41ce | 3886 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
3887 | if (kvm->arch.vpit) |
3888 | r = 0; | |
269e05e4 | 3889 | create_pit_unlock: |
79fac95e | 3890 | mutex_unlock(&kvm->slots_lock); |
7837699f | 3891 | break; |
1fe779f8 CO |
3892 | case KVM_GET_IRQCHIP: { |
3893 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 3894 | struct kvm_irqchip *chip; |
1fe779f8 | 3895 | |
ff5c2c03 SL |
3896 | chip = memdup_user(argp, sizeof(*chip)); |
3897 | if (IS_ERR(chip)) { | |
3898 | r = PTR_ERR(chip); | |
1fe779f8 | 3899 | goto out; |
ff5c2c03 SL |
3900 | } |
3901 | ||
1fe779f8 | 3902 | r = -ENXIO; |
49df6397 | 3903 | if (!irqchip_in_kernel(kvm) || irqchip_split(kvm)) |
f0d66275 DH |
3904 | goto get_irqchip_out; |
3905 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 3906 | if (r) |
f0d66275 | 3907 | goto get_irqchip_out; |
1fe779f8 | 3908 | r = -EFAULT; |
f0d66275 DH |
3909 | if (copy_to_user(argp, chip, sizeof *chip)) |
3910 | goto get_irqchip_out; | |
1fe779f8 | 3911 | r = 0; |
f0d66275 DH |
3912 | get_irqchip_out: |
3913 | kfree(chip); | |
1fe779f8 CO |
3914 | break; |
3915 | } | |
3916 | case KVM_SET_IRQCHIP: { | |
3917 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 3918 | struct kvm_irqchip *chip; |
1fe779f8 | 3919 | |
ff5c2c03 SL |
3920 | chip = memdup_user(argp, sizeof(*chip)); |
3921 | if (IS_ERR(chip)) { | |
3922 | r = PTR_ERR(chip); | |
1fe779f8 | 3923 | goto out; |
ff5c2c03 SL |
3924 | } |
3925 | ||
1fe779f8 | 3926 | r = -ENXIO; |
49df6397 | 3927 | if (!irqchip_in_kernel(kvm) || irqchip_split(kvm)) |
f0d66275 DH |
3928 | goto set_irqchip_out; |
3929 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 3930 | if (r) |
f0d66275 | 3931 | goto set_irqchip_out; |
1fe779f8 | 3932 | r = 0; |
f0d66275 DH |
3933 | set_irqchip_out: |
3934 | kfree(chip); | |
1fe779f8 CO |
3935 | break; |
3936 | } | |
e0f63cb9 | 3937 | case KVM_GET_PIT: { |
e0f63cb9 | 3938 | r = -EFAULT; |
f0d66275 | 3939 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3940 | goto out; |
3941 | r = -ENXIO; | |
3942 | if (!kvm->arch.vpit) | |
3943 | goto out; | |
f0d66275 | 3944 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
3945 | if (r) |
3946 | goto out; | |
3947 | r = -EFAULT; | |
f0d66275 | 3948 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3949 | goto out; |
3950 | r = 0; | |
3951 | break; | |
3952 | } | |
3953 | case KVM_SET_PIT: { | |
e0f63cb9 | 3954 | r = -EFAULT; |
f0d66275 | 3955 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
3956 | goto out; |
3957 | r = -ENXIO; | |
3958 | if (!kvm->arch.vpit) | |
3959 | goto out; | |
f0d66275 | 3960 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
3961 | break; |
3962 | } | |
e9f42757 BK |
3963 | case KVM_GET_PIT2: { |
3964 | r = -ENXIO; | |
3965 | if (!kvm->arch.vpit) | |
3966 | goto out; | |
3967 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
3968 | if (r) | |
3969 | goto out; | |
3970 | r = -EFAULT; | |
3971 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
3972 | goto out; | |
3973 | r = 0; | |
3974 | break; | |
3975 | } | |
3976 | case KVM_SET_PIT2: { | |
3977 | r = -EFAULT; | |
3978 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
3979 | goto out; | |
3980 | r = -ENXIO; | |
3981 | if (!kvm->arch.vpit) | |
3982 | goto out; | |
3983 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
e9f42757 BK |
3984 | break; |
3985 | } | |
52d939a0 MT |
3986 | case KVM_REINJECT_CONTROL: { |
3987 | struct kvm_reinject_control control; | |
3988 | r = -EFAULT; | |
3989 | if (copy_from_user(&control, argp, sizeof(control))) | |
3990 | goto out; | |
3991 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
52d939a0 MT |
3992 | break; |
3993 | } | |
d71ba788 PB |
3994 | case KVM_SET_BOOT_CPU_ID: |
3995 | r = 0; | |
3996 | mutex_lock(&kvm->lock); | |
3997 | if (atomic_read(&kvm->online_vcpus) != 0) | |
3998 | r = -EBUSY; | |
3999 | else | |
4000 | kvm->arch.bsp_vcpu_id = arg; | |
4001 | mutex_unlock(&kvm->lock); | |
4002 | break; | |
ffde22ac ES |
4003 | case KVM_XEN_HVM_CONFIG: { |
4004 | r = -EFAULT; | |
4005 | if (copy_from_user(&kvm->arch.xen_hvm_config, argp, | |
4006 | sizeof(struct kvm_xen_hvm_config))) | |
4007 | goto out; | |
4008 | r = -EINVAL; | |
4009 | if (kvm->arch.xen_hvm_config.flags) | |
4010 | goto out; | |
4011 | r = 0; | |
4012 | break; | |
4013 | } | |
afbcf7ab | 4014 | case KVM_SET_CLOCK: { |
afbcf7ab GC |
4015 | struct kvm_clock_data user_ns; |
4016 | u64 now_ns; | |
4017 | s64 delta; | |
4018 | ||
4019 | r = -EFAULT; | |
4020 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
4021 | goto out; | |
4022 | ||
4023 | r = -EINVAL; | |
4024 | if (user_ns.flags) | |
4025 | goto out; | |
4026 | ||
4027 | r = 0; | |
395c6b0a | 4028 | local_irq_disable(); |
759379dd | 4029 | now_ns = get_kernel_ns(); |
afbcf7ab | 4030 | delta = user_ns.clock - now_ns; |
395c6b0a | 4031 | local_irq_enable(); |
afbcf7ab | 4032 | kvm->arch.kvmclock_offset = delta; |
2e762ff7 | 4033 | kvm_gen_update_masterclock(kvm); |
afbcf7ab GC |
4034 | break; |
4035 | } | |
4036 | case KVM_GET_CLOCK: { | |
afbcf7ab GC |
4037 | struct kvm_clock_data user_ns; |
4038 | u64 now_ns; | |
4039 | ||
395c6b0a | 4040 | local_irq_disable(); |
759379dd | 4041 | now_ns = get_kernel_ns(); |
afbcf7ab | 4042 | user_ns.clock = kvm->arch.kvmclock_offset + now_ns; |
395c6b0a | 4043 | local_irq_enable(); |
afbcf7ab | 4044 | user_ns.flags = 0; |
97e69aa6 | 4045 | memset(&user_ns.pad, 0, sizeof(user_ns.pad)); |
afbcf7ab GC |
4046 | |
4047 | r = -EFAULT; | |
4048 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
4049 | goto out; | |
4050 | r = 0; | |
4051 | break; | |
4052 | } | |
90de4a18 NA |
4053 | case KVM_ENABLE_CAP: { |
4054 | struct kvm_enable_cap cap; | |
afbcf7ab | 4055 | |
90de4a18 NA |
4056 | r = -EFAULT; |
4057 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
4058 | goto out; | |
4059 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
4060 | break; | |
4061 | } | |
1fe779f8 | 4062 | default: |
c274e03a | 4063 | r = kvm_vm_ioctl_assigned_device(kvm, ioctl, arg); |
1fe779f8 CO |
4064 | } |
4065 | out: | |
4066 | return r; | |
4067 | } | |
4068 | ||
a16b043c | 4069 | static void kvm_init_msr_list(void) |
043405e1 CO |
4070 | { |
4071 | u32 dummy[2]; | |
4072 | unsigned i, j; | |
4073 | ||
62ef68bb | 4074 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { |
043405e1 CO |
4075 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
4076 | continue; | |
93c4adc7 PB |
4077 | |
4078 | /* | |
4079 | * Even MSRs that are valid in the host may not be exposed | |
9dbe6cf9 | 4080 | * to the guests in some cases. |
93c4adc7 PB |
4081 | */ |
4082 | switch (msrs_to_save[i]) { | |
4083 | case MSR_IA32_BNDCFGS: | |
4084 | if (!kvm_x86_ops->mpx_supported()) | |
4085 | continue; | |
4086 | break; | |
9dbe6cf9 PB |
4087 | case MSR_TSC_AUX: |
4088 | if (!kvm_x86_ops->rdtscp_supported()) | |
4089 | continue; | |
4090 | break; | |
93c4adc7 PB |
4091 | default: |
4092 | break; | |
4093 | } | |
4094 | ||
043405e1 CO |
4095 | if (j < i) |
4096 | msrs_to_save[j] = msrs_to_save[i]; | |
4097 | j++; | |
4098 | } | |
4099 | num_msrs_to_save = j; | |
62ef68bb PB |
4100 | |
4101 | for (i = j = 0; i < ARRAY_SIZE(emulated_msrs); i++) { | |
4102 | switch (emulated_msrs[i]) { | |
6d396b55 PB |
4103 | case MSR_IA32_SMBASE: |
4104 | if (!kvm_x86_ops->cpu_has_high_real_mode_segbase()) | |
4105 | continue; | |
4106 | break; | |
62ef68bb PB |
4107 | default: |
4108 | break; | |
4109 | } | |
4110 | ||
4111 | if (j < i) | |
4112 | emulated_msrs[j] = emulated_msrs[i]; | |
4113 | j++; | |
4114 | } | |
4115 | num_emulated_msrs = j; | |
043405e1 CO |
4116 | } |
4117 | ||
bda9020e MT |
4118 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
4119 | const void *v) | |
bbd9b64e | 4120 | { |
70252a10 AK |
4121 | int handled = 0; |
4122 | int n; | |
4123 | ||
4124 | do { | |
4125 | n = min(len, 8); | |
bce87cce | 4126 | if (!(lapic_in_kernel(vcpu) && |
e32edf4f NN |
4127 | !kvm_iodevice_write(vcpu, &vcpu->arch.apic->dev, addr, n, v)) |
4128 | && kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, n, v)) | |
70252a10 AK |
4129 | break; |
4130 | handled += n; | |
4131 | addr += n; | |
4132 | len -= n; | |
4133 | v += n; | |
4134 | } while (len); | |
bbd9b64e | 4135 | |
70252a10 | 4136 | return handled; |
bbd9b64e CO |
4137 | } |
4138 | ||
bda9020e | 4139 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 4140 | { |
70252a10 AK |
4141 | int handled = 0; |
4142 | int n; | |
4143 | ||
4144 | do { | |
4145 | n = min(len, 8); | |
bce87cce | 4146 | if (!(lapic_in_kernel(vcpu) && |
e32edf4f NN |
4147 | !kvm_iodevice_read(vcpu, &vcpu->arch.apic->dev, |
4148 | addr, n, v)) | |
4149 | && kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, n, v)) | |
70252a10 AK |
4150 | break; |
4151 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, *(u64 *)v); | |
4152 | handled += n; | |
4153 | addr += n; | |
4154 | len -= n; | |
4155 | v += n; | |
4156 | } while (len); | |
bbd9b64e | 4157 | |
70252a10 | 4158 | return handled; |
bbd9b64e CO |
4159 | } |
4160 | ||
2dafc6c2 GN |
4161 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
4162 | struct kvm_segment *var, int seg) | |
4163 | { | |
4164 | kvm_x86_ops->set_segment(vcpu, var, seg); | |
4165 | } | |
4166 | ||
4167 | void kvm_get_segment(struct kvm_vcpu *vcpu, | |
4168 | struct kvm_segment *var, int seg) | |
4169 | { | |
4170 | kvm_x86_ops->get_segment(vcpu, var, seg); | |
4171 | } | |
4172 | ||
54987b7a PB |
4173 | gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, |
4174 | struct x86_exception *exception) | |
02f59dc9 JR |
4175 | { |
4176 | gpa_t t_gpa; | |
02f59dc9 JR |
4177 | |
4178 | BUG_ON(!mmu_is_nested(vcpu)); | |
4179 | ||
4180 | /* NPT walks are always user-walks */ | |
4181 | access |= PFERR_USER_MASK; | |
54987b7a | 4182 | t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, exception); |
02f59dc9 JR |
4183 | |
4184 | return t_gpa; | |
4185 | } | |
4186 | ||
ab9ae313 AK |
4187 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, |
4188 | struct x86_exception *exception) | |
1871c602 GN |
4189 | { |
4190 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
ab9ae313 | 4191 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4192 | } |
4193 | ||
ab9ae313 AK |
4194 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, |
4195 | struct x86_exception *exception) | |
1871c602 GN |
4196 | { |
4197 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
4198 | access |= PFERR_FETCH_MASK; | |
ab9ae313 | 4199 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4200 | } |
4201 | ||
ab9ae313 AK |
4202 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, |
4203 | struct x86_exception *exception) | |
1871c602 GN |
4204 | { |
4205 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
4206 | access |= PFERR_WRITE_MASK; | |
ab9ae313 | 4207 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4208 | } |
4209 | ||
4210 | /* uses this to access any guest's mapped memory without checking CPL */ | |
ab9ae313 AK |
4211 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, |
4212 | struct x86_exception *exception) | |
1871c602 | 4213 | { |
ab9ae313 | 4214 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception); |
1871c602 GN |
4215 | } |
4216 | ||
4217 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
4218 | struct kvm_vcpu *vcpu, u32 access, | |
bcc55cba | 4219 | struct x86_exception *exception) |
bbd9b64e CO |
4220 | { |
4221 | void *data = val; | |
10589a46 | 4222 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
4223 | |
4224 | while (bytes) { | |
14dfe855 | 4225 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access, |
ab9ae313 | 4226 | exception); |
bbd9b64e | 4227 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 4228 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
4229 | int ret; |
4230 | ||
bcc55cba | 4231 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4232 | return X86EMUL_PROPAGATE_FAULT; |
54bf36aa PB |
4233 | ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, data, |
4234 | offset, toread); | |
10589a46 | 4235 | if (ret < 0) { |
c3cd7ffa | 4236 | r = X86EMUL_IO_NEEDED; |
10589a46 MT |
4237 | goto out; |
4238 | } | |
bbd9b64e | 4239 | |
77c2002e IE |
4240 | bytes -= toread; |
4241 | data += toread; | |
4242 | addr += toread; | |
bbd9b64e | 4243 | } |
10589a46 | 4244 | out: |
10589a46 | 4245 | return r; |
bbd9b64e | 4246 | } |
77c2002e | 4247 | |
1871c602 | 4248 | /* used for instruction fetching */ |
0f65dd70 AK |
4249 | static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt, |
4250 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4251 | struct x86_exception *exception) |
1871c602 | 4252 | { |
0f65dd70 | 4253 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4254 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
44583cba PB |
4255 | unsigned offset; |
4256 | int ret; | |
0f65dd70 | 4257 | |
44583cba PB |
4258 | /* Inline kvm_read_guest_virt_helper for speed. */ |
4259 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access|PFERR_FETCH_MASK, | |
4260 | exception); | |
4261 | if (unlikely(gpa == UNMAPPED_GVA)) | |
4262 | return X86EMUL_PROPAGATE_FAULT; | |
4263 | ||
4264 | offset = addr & (PAGE_SIZE-1); | |
4265 | if (WARN_ON(offset + bytes > PAGE_SIZE)) | |
4266 | bytes = (unsigned)PAGE_SIZE - offset; | |
54bf36aa PB |
4267 | ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, val, |
4268 | offset, bytes); | |
44583cba PB |
4269 | if (unlikely(ret < 0)) |
4270 | return X86EMUL_IO_NEEDED; | |
4271 | ||
4272 | return X86EMUL_CONTINUE; | |
1871c602 GN |
4273 | } |
4274 | ||
064aea77 | 4275 | int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4276 | gva_t addr, void *val, unsigned int bytes, |
bcc55cba | 4277 | struct x86_exception *exception) |
1871c602 | 4278 | { |
0f65dd70 | 4279 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4280 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
0f65dd70 | 4281 | |
1871c602 | 4282 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, |
bcc55cba | 4283 | exception); |
1871c602 | 4284 | } |
064aea77 | 4285 | EXPORT_SYMBOL_GPL(kvm_read_guest_virt); |
1871c602 | 4286 | |
0f65dd70 AK |
4287 | static int kvm_read_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
4288 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4289 | struct x86_exception *exception) |
1871c602 | 4290 | { |
0f65dd70 | 4291 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
bcc55cba | 4292 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception); |
1871c602 GN |
4293 | } |
4294 | ||
7a036a6f RK |
4295 | static int kvm_read_guest_phys_system(struct x86_emulate_ctxt *ctxt, |
4296 | unsigned long addr, void *val, unsigned int bytes) | |
4297 | { | |
4298 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4299 | int r = kvm_vcpu_read_guest(vcpu, addr, val, bytes); | |
4300 | ||
4301 | return r < 0 ? X86EMUL_IO_NEEDED : X86EMUL_CONTINUE; | |
4302 | } | |
4303 | ||
6a4d7550 | 4304 | int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4305 | gva_t addr, void *val, |
2dafc6c2 | 4306 | unsigned int bytes, |
bcc55cba | 4307 | struct x86_exception *exception) |
77c2002e | 4308 | { |
0f65dd70 | 4309 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
77c2002e IE |
4310 | void *data = val; |
4311 | int r = X86EMUL_CONTINUE; | |
4312 | ||
4313 | while (bytes) { | |
14dfe855 JR |
4314 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, |
4315 | PFERR_WRITE_MASK, | |
ab9ae313 | 4316 | exception); |
77c2002e IE |
4317 | unsigned offset = addr & (PAGE_SIZE-1); |
4318 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
4319 | int ret; | |
4320 | ||
bcc55cba | 4321 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4322 | return X86EMUL_PROPAGATE_FAULT; |
54bf36aa | 4323 | ret = kvm_vcpu_write_guest(vcpu, gpa, data, towrite); |
77c2002e | 4324 | if (ret < 0) { |
c3cd7ffa | 4325 | r = X86EMUL_IO_NEEDED; |
77c2002e IE |
4326 | goto out; |
4327 | } | |
4328 | ||
4329 | bytes -= towrite; | |
4330 | data += towrite; | |
4331 | addr += towrite; | |
4332 | } | |
4333 | out: | |
4334 | return r; | |
4335 | } | |
6a4d7550 | 4336 | EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system); |
77c2002e | 4337 | |
af7cc7d1 XG |
4338 | static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva, |
4339 | gpa_t *gpa, struct x86_exception *exception, | |
4340 | bool write) | |
4341 | { | |
97d64b78 AK |
4342 | u32 access = ((kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0) |
4343 | | (write ? PFERR_WRITE_MASK : 0); | |
af7cc7d1 | 4344 | |
be94f6b7 HH |
4345 | /* |
4346 | * currently PKRU is only applied to ept enabled guest so | |
4347 | * there is no pkey in EPT page table for L1 guest or EPT | |
4348 | * shadow page table for L2 guest. | |
4349 | */ | |
97d64b78 | 4350 | if (vcpu_match_mmio_gva(vcpu, gva) |
97ec8c06 | 4351 | && !permission_fault(vcpu, vcpu->arch.walk_mmu, |
be94f6b7 | 4352 | vcpu->arch.access, 0, access)) { |
bebb106a XG |
4353 | *gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT | |
4354 | (gva & (PAGE_SIZE - 1)); | |
4f022648 | 4355 | trace_vcpu_match_mmio(gva, *gpa, write, false); |
bebb106a XG |
4356 | return 1; |
4357 | } | |
4358 | ||
af7cc7d1 XG |
4359 | *gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
4360 | ||
4361 | if (*gpa == UNMAPPED_GVA) | |
4362 | return -1; | |
4363 | ||
4364 | /* For APIC access vmexit */ | |
4365 | if ((*gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4366 | return 1; | |
4367 | ||
4f022648 XG |
4368 | if (vcpu_match_mmio_gpa(vcpu, *gpa)) { |
4369 | trace_vcpu_match_mmio(gva, *gpa, write, true); | |
bebb106a | 4370 | return 1; |
4f022648 | 4371 | } |
bebb106a | 4372 | |
af7cc7d1 XG |
4373 | return 0; |
4374 | } | |
4375 | ||
3200f405 | 4376 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
bcc55cba | 4377 | const void *val, int bytes) |
bbd9b64e CO |
4378 | { |
4379 | int ret; | |
4380 | ||
54bf36aa | 4381 | ret = kvm_vcpu_write_guest(vcpu, gpa, val, bytes); |
9f811285 | 4382 | if (ret < 0) |
bbd9b64e | 4383 | return 0; |
0eb05bf2 | 4384 | kvm_page_track_write(vcpu, gpa, val, bytes); |
bbd9b64e CO |
4385 | return 1; |
4386 | } | |
4387 | ||
77d197b2 XG |
4388 | struct read_write_emulator_ops { |
4389 | int (*read_write_prepare)(struct kvm_vcpu *vcpu, void *val, | |
4390 | int bytes); | |
4391 | int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4392 | void *val, int bytes); | |
4393 | int (*read_write_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4394 | int bytes, void *val); | |
4395 | int (*read_write_exit_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4396 | void *val, int bytes); | |
4397 | bool write; | |
4398 | }; | |
4399 | ||
4400 | static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes) | |
4401 | { | |
4402 | if (vcpu->mmio_read_completed) { | |
77d197b2 | 4403 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
f78146b0 | 4404 | vcpu->mmio_fragments[0].gpa, *(u64 *)val); |
77d197b2 XG |
4405 | vcpu->mmio_read_completed = 0; |
4406 | return 1; | |
4407 | } | |
4408 | ||
4409 | return 0; | |
4410 | } | |
4411 | ||
4412 | static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4413 | void *val, int bytes) | |
4414 | { | |
54bf36aa | 4415 | return !kvm_vcpu_read_guest(vcpu, gpa, val, bytes); |
77d197b2 XG |
4416 | } |
4417 | ||
4418 | static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4419 | void *val, int bytes) | |
4420 | { | |
4421 | return emulator_write_phys(vcpu, gpa, val, bytes); | |
4422 | } | |
4423 | ||
4424 | static int write_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val) | |
4425 | { | |
4426 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); | |
4427 | return vcpu_mmio_write(vcpu, gpa, bytes, val); | |
4428 | } | |
4429 | ||
4430 | static int read_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4431 | void *val, int bytes) | |
4432 | { | |
4433 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
4434 | return X86EMUL_IO_NEEDED; | |
4435 | } | |
4436 | ||
4437 | static int write_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4438 | void *val, int bytes) | |
4439 | { | |
f78146b0 AK |
4440 | struct kvm_mmio_fragment *frag = &vcpu->mmio_fragments[0]; |
4441 | ||
87da7e66 | 4442 | memcpy(vcpu->run->mmio.data, frag->data, min(8u, frag->len)); |
77d197b2 XG |
4443 | return X86EMUL_CONTINUE; |
4444 | } | |
4445 | ||
0fbe9b0b | 4446 | static const struct read_write_emulator_ops read_emultor = { |
77d197b2 XG |
4447 | .read_write_prepare = read_prepare, |
4448 | .read_write_emulate = read_emulate, | |
4449 | .read_write_mmio = vcpu_mmio_read, | |
4450 | .read_write_exit_mmio = read_exit_mmio, | |
4451 | }; | |
4452 | ||
0fbe9b0b | 4453 | static const struct read_write_emulator_ops write_emultor = { |
77d197b2 XG |
4454 | .read_write_emulate = write_emulate, |
4455 | .read_write_mmio = write_mmio, | |
4456 | .read_write_exit_mmio = write_exit_mmio, | |
4457 | .write = true, | |
4458 | }; | |
4459 | ||
22388a3c XG |
4460 | static int emulator_read_write_onepage(unsigned long addr, void *val, |
4461 | unsigned int bytes, | |
4462 | struct x86_exception *exception, | |
4463 | struct kvm_vcpu *vcpu, | |
0fbe9b0b | 4464 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 4465 | { |
af7cc7d1 XG |
4466 | gpa_t gpa; |
4467 | int handled, ret; | |
22388a3c | 4468 | bool write = ops->write; |
f78146b0 | 4469 | struct kvm_mmio_fragment *frag; |
10589a46 | 4470 | |
22388a3c | 4471 | ret = vcpu_mmio_gva_to_gpa(vcpu, addr, &gpa, exception, write); |
bbd9b64e | 4472 | |
af7cc7d1 | 4473 | if (ret < 0) |
bbd9b64e | 4474 | return X86EMUL_PROPAGATE_FAULT; |
bbd9b64e CO |
4475 | |
4476 | /* For APIC access vmexit */ | |
af7cc7d1 | 4477 | if (ret) |
bbd9b64e CO |
4478 | goto mmio; |
4479 | ||
22388a3c | 4480 | if (ops->read_write_emulate(vcpu, gpa, val, bytes)) |
bbd9b64e CO |
4481 | return X86EMUL_CONTINUE; |
4482 | ||
4483 | mmio: | |
4484 | /* | |
4485 | * Is this MMIO handled locally? | |
4486 | */ | |
22388a3c | 4487 | handled = ops->read_write_mmio(vcpu, gpa, bytes, val); |
70252a10 | 4488 | if (handled == bytes) |
bbd9b64e | 4489 | return X86EMUL_CONTINUE; |
bbd9b64e | 4490 | |
70252a10 AK |
4491 | gpa += handled; |
4492 | bytes -= handled; | |
4493 | val += handled; | |
4494 | ||
87da7e66 XG |
4495 | WARN_ON(vcpu->mmio_nr_fragments >= KVM_MAX_MMIO_FRAGMENTS); |
4496 | frag = &vcpu->mmio_fragments[vcpu->mmio_nr_fragments++]; | |
4497 | frag->gpa = gpa; | |
4498 | frag->data = val; | |
4499 | frag->len = bytes; | |
f78146b0 | 4500 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
4501 | } |
4502 | ||
52eb5a6d XL |
4503 | static int emulator_read_write(struct x86_emulate_ctxt *ctxt, |
4504 | unsigned long addr, | |
22388a3c XG |
4505 | void *val, unsigned int bytes, |
4506 | struct x86_exception *exception, | |
0fbe9b0b | 4507 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 4508 | { |
0f65dd70 | 4509 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
f78146b0 AK |
4510 | gpa_t gpa; |
4511 | int rc; | |
4512 | ||
4513 | if (ops->read_write_prepare && | |
4514 | ops->read_write_prepare(vcpu, val, bytes)) | |
4515 | return X86EMUL_CONTINUE; | |
4516 | ||
4517 | vcpu->mmio_nr_fragments = 0; | |
0f65dd70 | 4518 | |
bbd9b64e CO |
4519 | /* Crossing a page boundary? */ |
4520 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
f78146b0 | 4521 | int now; |
bbd9b64e CO |
4522 | |
4523 | now = -addr & ~PAGE_MASK; | |
22388a3c XG |
4524 | rc = emulator_read_write_onepage(addr, val, now, exception, |
4525 | vcpu, ops); | |
4526 | ||
bbd9b64e CO |
4527 | if (rc != X86EMUL_CONTINUE) |
4528 | return rc; | |
4529 | addr += now; | |
bac15531 NA |
4530 | if (ctxt->mode != X86EMUL_MODE_PROT64) |
4531 | addr = (u32)addr; | |
bbd9b64e CO |
4532 | val += now; |
4533 | bytes -= now; | |
4534 | } | |
22388a3c | 4535 | |
f78146b0 AK |
4536 | rc = emulator_read_write_onepage(addr, val, bytes, exception, |
4537 | vcpu, ops); | |
4538 | if (rc != X86EMUL_CONTINUE) | |
4539 | return rc; | |
4540 | ||
4541 | if (!vcpu->mmio_nr_fragments) | |
4542 | return rc; | |
4543 | ||
4544 | gpa = vcpu->mmio_fragments[0].gpa; | |
4545 | ||
4546 | vcpu->mmio_needed = 1; | |
4547 | vcpu->mmio_cur_fragment = 0; | |
4548 | ||
87da7e66 | 4549 | vcpu->run->mmio.len = min(8u, vcpu->mmio_fragments[0].len); |
f78146b0 AK |
4550 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = ops->write; |
4551 | vcpu->run->exit_reason = KVM_EXIT_MMIO; | |
4552 | vcpu->run->mmio.phys_addr = gpa; | |
4553 | ||
4554 | return ops->read_write_exit_mmio(vcpu, gpa, val, bytes); | |
22388a3c XG |
4555 | } |
4556 | ||
4557 | static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt, | |
4558 | unsigned long addr, | |
4559 | void *val, | |
4560 | unsigned int bytes, | |
4561 | struct x86_exception *exception) | |
4562 | { | |
4563 | return emulator_read_write(ctxt, addr, val, bytes, | |
4564 | exception, &read_emultor); | |
4565 | } | |
4566 | ||
52eb5a6d | 4567 | static int emulator_write_emulated(struct x86_emulate_ctxt *ctxt, |
22388a3c XG |
4568 | unsigned long addr, |
4569 | const void *val, | |
4570 | unsigned int bytes, | |
4571 | struct x86_exception *exception) | |
4572 | { | |
4573 | return emulator_read_write(ctxt, addr, (void *)val, bytes, | |
4574 | exception, &write_emultor); | |
bbd9b64e | 4575 | } |
bbd9b64e | 4576 | |
daea3e73 AK |
4577 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
4578 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) | |
4579 | ||
4580 | #ifdef CONFIG_X86_64 | |
4581 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) | |
4582 | #else | |
4583 | # define CMPXCHG64(ptr, old, new) \ | |
9749a6c0 | 4584 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
daea3e73 AK |
4585 | #endif |
4586 | ||
0f65dd70 AK |
4587 | static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, |
4588 | unsigned long addr, | |
bbd9b64e CO |
4589 | const void *old, |
4590 | const void *new, | |
4591 | unsigned int bytes, | |
0f65dd70 | 4592 | struct x86_exception *exception) |
bbd9b64e | 4593 | { |
0f65dd70 | 4594 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
daea3e73 AK |
4595 | gpa_t gpa; |
4596 | struct page *page; | |
4597 | char *kaddr; | |
4598 | bool exchanged; | |
2bacc55c | 4599 | |
daea3e73 AK |
4600 | /* guests cmpxchg8b have to be emulated atomically */ |
4601 | if (bytes > 8 || (bytes & (bytes - 1))) | |
4602 | goto emul_write; | |
10589a46 | 4603 | |
daea3e73 | 4604 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
2bacc55c | 4605 | |
daea3e73 AK |
4606 | if (gpa == UNMAPPED_GVA || |
4607 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4608 | goto emul_write; | |
2bacc55c | 4609 | |
daea3e73 AK |
4610 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
4611 | goto emul_write; | |
72dc67a6 | 4612 | |
54bf36aa | 4613 | page = kvm_vcpu_gfn_to_page(vcpu, gpa >> PAGE_SHIFT); |
32cad84f | 4614 | if (is_error_page(page)) |
c19b8bd6 | 4615 | goto emul_write; |
72dc67a6 | 4616 | |
8fd75e12 | 4617 | kaddr = kmap_atomic(page); |
daea3e73 AK |
4618 | kaddr += offset_in_page(gpa); |
4619 | switch (bytes) { | |
4620 | case 1: | |
4621 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); | |
4622 | break; | |
4623 | case 2: | |
4624 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); | |
4625 | break; | |
4626 | case 4: | |
4627 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); | |
4628 | break; | |
4629 | case 8: | |
4630 | exchanged = CMPXCHG64(kaddr, old, new); | |
4631 | break; | |
4632 | default: | |
4633 | BUG(); | |
2bacc55c | 4634 | } |
8fd75e12 | 4635 | kunmap_atomic(kaddr); |
daea3e73 AK |
4636 | kvm_release_page_dirty(page); |
4637 | ||
4638 | if (!exchanged) | |
4639 | return X86EMUL_CMPXCHG_FAILED; | |
4640 | ||
54bf36aa | 4641 | kvm_vcpu_mark_page_dirty(vcpu, gpa >> PAGE_SHIFT); |
0eb05bf2 | 4642 | kvm_page_track_write(vcpu, gpa, new, bytes); |
8f6abd06 GN |
4643 | |
4644 | return X86EMUL_CONTINUE; | |
4a5f48f6 | 4645 | |
3200f405 | 4646 | emul_write: |
daea3e73 | 4647 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c | 4648 | |
0f65dd70 | 4649 | return emulator_write_emulated(ctxt, addr, new, bytes, exception); |
bbd9b64e CO |
4650 | } |
4651 | ||
cf8f70bf GN |
4652 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
4653 | { | |
4654 | /* TODO: String I/O for in kernel device */ | |
4655 | int r; | |
4656 | ||
4657 | if (vcpu->arch.pio.in) | |
e32edf4f | 4658 | r = kvm_io_bus_read(vcpu, KVM_PIO_BUS, vcpu->arch.pio.port, |
cf8f70bf GN |
4659 | vcpu->arch.pio.size, pd); |
4660 | else | |
e32edf4f | 4661 | r = kvm_io_bus_write(vcpu, KVM_PIO_BUS, |
cf8f70bf GN |
4662 | vcpu->arch.pio.port, vcpu->arch.pio.size, |
4663 | pd); | |
4664 | return r; | |
4665 | } | |
4666 | ||
6f6fbe98 XG |
4667 | static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size, |
4668 | unsigned short port, void *val, | |
4669 | unsigned int count, bool in) | |
cf8f70bf | 4670 | { |
cf8f70bf | 4671 | vcpu->arch.pio.port = port; |
6f6fbe98 | 4672 | vcpu->arch.pio.in = in; |
7972995b | 4673 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
4674 | vcpu->arch.pio.size = size; |
4675 | ||
4676 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
7972995b | 4677 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4678 | return 1; |
4679 | } | |
4680 | ||
4681 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
6f6fbe98 | 4682 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; |
cf8f70bf GN |
4683 | vcpu->run->io.size = size; |
4684 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
4685 | vcpu->run->io.count = count; | |
4686 | vcpu->run->io.port = port; | |
4687 | ||
4688 | return 0; | |
4689 | } | |
4690 | ||
6f6fbe98 XG |
4691 | static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt, |
4692 | int size, unsigned short port, void *val, | |
4693 | unsigned int count) | |
cf8f70bf | 4694 | { |
ca1d4a9e | 4695 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
6f6fbe98 | 4696 | int ret; |
ca1d4a9e | 4697 | |
6f6fbe98 XG |
4698 | if (vcpu->arch.pio.count) |
4699 | goto data_avail; | |
cf8f70bf | 4700 | |
6f6fbe98 XG |
4701 | ret = emulator_pio_in_out(vcpu, size, port, val, count, true); |
4702 | if (ret) { | |
4703 | data_avail: | |
4704 | memcpy(val, vcpu->arch.pio_data, size * count); | |
1171903d | 4705 | trace_kvm_pio(KVM_PIO_IN, port, size, count, vcpu->arch.pio_data); |
7972995b | 4706 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4707 | return 1; |
4708 | } | |
4709 | ||
cf8f70bf GN |
4710 | return 0; |
4711 | } | |
4712 | ||
6f6fbe98 XG |
4713 | static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt, |
4714 | int size, unsigned short port, | |
4715 | const void *val, unsigned int count) | |
4716 | { | |
4717 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4718 | ||
4719 | memcpy(vcpu->arch.pio_data, val, size * count); | |
1171903d | 4720 | trace_kvm_pio(KVM_PIO_OUT, port, size, count, vcpu->arch.pio_data); |
6f6fbe98 XG |
4721 | return emulator_pio_in_out(vcpu, size, port, (void *)val, count, false); |
4722 | } | |
4723 | ||
bbd9b64e CO |
4724 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
4725 | { | |
4726 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
4727 | } | |
4728 | ||
3cb16fe7 | 4729 | static void emulator_invlpg(struct x86_emulate_ctxt *ctxt, ulong address) |
bbd9b64e | 4730 | { |
3cb16fe7 | 4731 | kvm_mmu_invlpg(emul_to_vcpu(ctxt), address); |
bbd9b64e CO |
4732 | } |
4733 | ||
5cb56059 | 4734 | int kvm_emulate_wbinvd_noskip(struct kvm_vcpu *vcpu) |
f5f48ee1 SY |
4735 | { |
4736 | if (!need_emulate_wbinvd(vcpu)) | |
4737 | return X86EMUL_CONTINUE; | |
4738 | ||
4739 | if (kvm_x86_ops->has_wbinvd_exit()) { | |
2eec7343 JK |
4740 | int cpu = get_cpu(); |
4741 | ||
4742 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
f5f48ee1 SY |
4743 | smp_call_function_many(vcpu->arch.wbinvd_dirty_mask, |
4744 | wbinvd_ipi, NULL, 1); | |
2eec7343 | 4745 | put_cpu(); |
f5f48ee1 | 4746 | cpumask_clear(vcpu->arch.wbinvd_dirty_mask); |
2eec7343 JK |
4747 | } else |
4748 | wbinvd(); | |
f5f48ee1 SY |
4749 | return X86EMUL_CONTINUE; |
4750 | } | |
5cb56059 JS |
4751 | |
4752 | int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
4753 | { | |
4754 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
4755 | return kvm_emulate_wbinvd_noskip(vcpu); | |
4756 | } | |
f5f48ee1 SY |
4757 | EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd); |
4758 | ||
5cb56059 JS |
4759 | |
4760 | ||
bcaf5cc5 AK |
4761 | static void emulator_wbinvd(struct x86_emulate_ctxt *ctxt) |
4762 | { | |
5cb56059 | 4763 | kvm_emulate_wbinvd_noskip(emul_to_vcpu(ctxt)); |
bcaf5cc5 AK |
4764 | } |
4765 | ||
52eb5a6d XL |
4766 | static int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, |
4767 | unsigned long *dest) | |
bbd9b64e | 4768 | { |
16f8a6f9 | 4769 | return kvm_get_dr(emul_to_vcpu(ctxt), dr, dest); |
bbd9b64e CO |
4770 | } |
4771 | ||
52eb5a6d XL |
4772 | static int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, |
4773 | unsigned long value) | |
bbd9b64e | 4774 | { |
338dbc97 | 4775 | |
717746e3 | 4776 | return __kvm_set_dr(emul_to_vcpu(ctxt), dr, value); |
bbd9b64e CO |
4777 | } |
4778 | ||
52a46617 | 4779 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
5fdbf976 | 4780 | { |
52a46617 | 4781 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
5fdbf976 MT |
4782 | } |
4783 | ||
717746e3 | 4784 | static unsigned long emulator_get_cr(struct x86_emulate_ctxt *ctxt, int cr) |
bbd9b64e | 4785 | { |
717746e3 | 4786 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
52a46617 GN |
4787 | unsigned long value; |
4788 | ||
4789 | switch (cr) { | |
4790 | case 0: | |
4791 | value = kvm_read_cr0(vcpu); | |
4792 | break; | |
4793 | case 2: | |
4794 | value = vcpu->arch.cr2; | |
4795 | break; | |
4796 | case 3: | |
9f8fe504 | 4797 | value = kvm_read_cr3(vcpu); |
52a46617 GN |
4798 | break; |
4799 | case 4: | |
4800 | value = kvm_read_cr4(vcpu); | |
4801 | break; | |
4802 | case 8: | |
4803 | value = kvm_get_cr8(vcpu); | |
4804 | break; | |
4805 | default: | |
a737f256 | 4806 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
52a46617 GN |
4807 | return 0; |
4808 | } | |
4809 | ||
4810 | return value; | |
4811 | } | |
4812 | ||
717746e3 | 4813 | static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val) |
52a46617 | 4814 | { |
717746e3 | 4815 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
0f12244f GN |
4816 | int res = 0; |
4817 | ||
52a46617 GN |
4818 | switch (cr) { |
4819 | case 0: | |
49a9b07e | 4820 | res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
52a46617 GN |
4821 | break; |
4822 | case 2: | |
4823 | vcpu->arch.cr2 = val; | |
4824 | break; | |
4825 | case 3: | |
2390218b | 4826 | res = kvm_set_cr3(vcpu, val); |
52a46617 GN |
4827 | break; |
4828 | case 4: | |
a83b29c6 | 4829 | res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
52a46617 GN |
4830 | break; |
4831 | case 8: | |
eea1cff9 | 4832 | res = kvm_set_cr8(vcpu, val); |
52a46617 GN |
4833 | break; |
4834 | default: | |
a737f256 | 4835 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
0f12244f | 4836 | res = -1; |
52a46617 | 4837 | } |
0f12244f GN |
4838 | |
4839 | return res; | |
52a46617 GN |
4840 | } |
4841 | ||
717746e3 | 4842 | static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt) |
9c537244 | 4843 | { |
717746e3 | 4844 | return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt)); |
9c537244 GN |
4845 | } |
4846 | ||
4bff1e86 | 4847 | static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
2dafc6c2 | 4848 | { |
4bff1e86 | 4849 | kvm_x86_ops->get_gdt(emul_to_vcpu(ctxt), dt); |
2dafc6c2 GN |
4850 | } |
4851 | ||
4bff1e86 | 4852 | static void emulator_get_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
160ce1f1 | 4853 | { |
4bff1e86 | 4854 | kvm_x86_ops->get_idt(emul_to_vcpu(ctxt), dt); |
160ce1f1 MG |
4855 | } |
4856 | ||
1ac9d0cf AK |
4857 | static void emulator_set_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
4858 | { | |
4859 | kvm_x86_ops->set_gdt(emul_to_vcpu(ctxt), dt); | |
4860 | } | |
4861 | ||
4862 | static void emulator_set_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) | |
4863 | { | |
4864 | kvm_x86_ops->set_idt(emul_to_vcpu(ctxt), dt); | |
4865 | } | |
4866 | ||
4bff1e86 AK |
4867 | static unsigned long emulator_get_cached_segment_base( |
4868 | struct x86_emulate_ctxt *ctxt, int seg) | |
5951c442 | 4869 | { |
4bff1e86 | 4870 | return get_segment_base(emul_to_vcpu(ctxt), seg); |
5951c442 GN |
4871 | } |
4872 | ||
1aa36616 AK |
4873 | static bool emulator_get_segment(struct x86_emulate_ctxt *ctxt, u16 *selector, |
4874 | struct desc_struct *desc, u32 *base3, | |
4875 | int seg) | |
2dafc6c2 GN |
4876 | { |
4877 | struct kvm_segment var; | |
4878 | ||
4bff1e86 | 4879 | kvm_get_segment(emul_to_vcpu(ctxt), &var, seg); |
1aa36616 | 4880 | *selector = var.selector; |
2dafc6c2 | 4881 | |
378a8b09 GN |
4882 | if (var.unusable) { |
4883 | memset(desc, 0, sizeof(*desc)); | |
2dafc6c2 | 4884 | return false; |
378a8b09 | 4885 | } |
2dafc6c2 GN |
4886 | |
4887 | if (var.g) | |
4888 | var.limit >>= 12; | |
4889 | set_desc_limit(desc, var.limit); | |
4890 | set_desc_base(desc, (unsigned long)var.base); | |
5601d05b GN |
4891 | #ifdef CONFIG_X86_64 |
4892 | if (base3) | |
4893 | *base3 = var.base >> 32; | |
4894 | #endif | |
2dafc6c2 GN |
4895 | desc->type = var.type; |
4896 | desc->s = var.s; | |
4897 | desc->dpl = var.dpl; | |
4898 | desc->p = var.present; | |
4899 | desc->avl = var.avl; | |
4900 | desc->l = var.l; | |
4901 | desc->d = var.db; | |
4902 | desc->g = var.g; | |
4903 | ||
4904 | return true; | |
4905 | } | |
4906 | ||
1aa36616 AK |
4907 | static void emulator_set_segment(struct x86_emulate_ctxt *ctxt, u16 selector, |
4908 | struct desc_struct *desc, u32 base3, | |
4909 | int seg) | |
2dafc6c2 | 4910 | { |
4bff1e86 | 4911 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
2dafc6c2 GN |
4912 | struct kvm_segment var; |
4913 | ||
1aa36616 | 4914 | var.selector = selector; |
2dafc6c2 | 4915 | var.base = get_desc_base(desc); |
5601d05b GN |
4916 | #ifdef CONFIG_X86_64 |
4917 | var.base |= ((u64)base3) << 32; | |
4918 | #endif | |
2dafc6c2 GN |
4919 | var.limit = get_desc_limit(desc); |
4920 | if (desc->g) | |
4921 | var.limit = (var.limit << 12) | 0xfff; | |
4922 | var.type = desc->type; | |
2dafc6c2 GN |
4923 | var.dpl = desc->dpl; |
4924 | var.db = desc->d; | |
4925 | var.s = desc->s; | |
4926 | var.l = desc->l; | |
4927 | var.g = desc->g; | |
4928 | var.avl = desc->avl; | |
4929 | var.present = desc->p; | |
4930 | var.unusable = !var.present; | |
4931 | var.padding = 0; | |
4932 | ||
4933 | kvm_set_segment(vcpu, &var, seg); | |
4934 | return; | |
4935 | } | |
4936 | ||
717746e3 AK |
4937 | static int emulator_get_msr(struct x86_emulate_ctxt *ctxt, |
4938 | u32 msr_index, u64 *pdata) | |
4939 | { | |
609e36d3 PB |
4940 | struct msr_data msr; |
4941 | int r; | |
4942 | ||
4943 | msr.index = msr_index; | |
4944 | msr.host_initiated = false; | |
4945 | r = kvm_get_msr(emul_to_vcpu(ctxt), &msr); | |
4946 | if (r) | |
4947 | return r; | |
4948 | ||
4949 | *pdata = msr.data; | |
4950 | return 0; | |
717746e3 AK |
4951 | } |
4952 | ||
4953 | static int emulator_set_msr(struct x86_emulate_ctxt *ctxt, | |
4954 | u32 msr_index, u64 data) | |
4955 | { | |
8fe8ab46 WA |
4956 | struct msr_data msr; |
4957 | ||
4958 | msr.data = data; | |
4959 | msr.index = msr_index; | |
4960 | msr.host_initiated = false; | |
4961 | return kvm_set_msr(emul_to_vcpu(ctxt), &msr); | |
717746e3 AK |
4962 | } |
4963 | ||
64d60670 PB |
4964 | static u64 emulator_get_smbase(struct x86_emulate_ctxt *ctxt) |
4965 | { | |
4966 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4967 | ||
4968 | return vcpu->arch.smbase; | |
4969 | } | |
4970 | ||
4971 | static void emulator_set_smbase(struct x86_emulate_ctxt *ctxt, u64 smbase) | |
4972 | { | |
4973 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4974 | ||
4975 | vcpu->arch.smbase = smbase; | |
4976 | } | |
4977 | ||
67f4d428 NA |
4978 | static int emulator_check_pmc(struct x86_emulate_ctxt *ctxt, |
4979 | u32 pmc) | |
4980 | { | |
c6702c9d | 4981 | return kvm_pmu_is_valid_msr_idx(emul_to_vcpu(ctxt), pmc); |
67f4d428 NA |
4982 | } |
4983 | ||
222d21aa AK |
4984 | static int emulator_read_pmc(struct x86_emulate_ctxt *ctxt, |
4985 | u32 pmc, u64 *pdata) | |
4986 | { | |
c6702c9d | 4987 | return kvm_pmu_rdpmc(emul_to_vcpu(ctxt), pmc, pdata); |
222d21aa AK |
4988 | } |
4989 | ||
6c3287f7 AK |
4990 | static void emulator_halt(struct x86_emulate_ctxt *ctxt) |
4991 | { | |
4992 | emul_to_vcpu(ctxt)->arch.halt_request = 1; | |
4993 | } | |
4994 | ||
5037f6f3 AK |
4995 | static void emulator_get_fpu(struct x86_emulate_ctxt *ctxt) |
4996 | { | |
4997 | preempt_disable(); | |
5197b808 | 4998 | kvm_load_guest_fpu(emul_to_vcpu(ctxt)); |
5037f6f3 AK |
4999 | /* |
5000 | * CR0.TS may reference the host fpu state, not the guest fpu state, | |
5001 | * so it may be clear at this point. | |
5002 | */ | |
5003 | clts(); | |
5004 | } | |
5005 | ||
5006 | static void emulator_put_fpu(struct x86_emulate_ctxt *ctxt) | |
5007 | { | |
5008 | preempt_enable(); | |
5009 | } | |
5010 | ||
2953538e | 5011 | static int emulator_intercept(struct x86_emulate_ctxt *ctxt, |
8a76d7f2 | 5012 | struct x86_instruction_info *info, |
c4f035c6 AK |
5013 | enum x86_intercept_stage stage) |
5014 | { | |
2953538e | 5015 | return kvm_x86_ops->check_intercept(emul_to_vcpu(ctxt), info, stage); |
c4f035c6 AK |
5016 | } |
5017 | ||
0017f93a | 5018 | static void emulator_get_cpuid(struct x86_emulate_ctxt *ctxt, |
bdb42f5a SB |
5019 | u32 *eax, u32 *ebx, u32 *ecx, u32 *edx) |
5020 | { | |
0017f93a | 5021 | kvm_cpuid(emul_to_vcpu(ctxt), eax, ebx, ecx, edx); |
bdb42f5a SB |
5022 | } |
5023 | ||
dd856efa AK |
5024 | static ulong emulator_read_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg) |
5025 | { | |
5026 | return kvm_register_read(emul_to_vcpu(ctxt), reg); | |
5027 | } | |
5028 | ||
5029 | static void emulator_write_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg, ulong val) | |
5030 | { | |
5031 | kvm_register_write(emul_to_vcpu(ctxt), reg, val); | |
5032 | } | |
5033 | ||
801806d9 NA |
5034 | static void emulator_set_nmi_mask(struct x86_emulate_ctxt *ctxt, bool masked) |
5035 | { | |
5036 | kvm_x86_ops->set_nmi_mask(emul_to_vcpu(ctxt), masked); | |
5037 | } | |
5038 | ||
0225fb50 | 5039 | static const struct x86_emulate_ops emulate_ops = { |
dd856efa AK |
5040 | .read_gpr = emulator_read_gpr, |
5041 | .write_gpr = emulator_write_gpr, | |
1871c602 | 5042 | .read_std = kvm_read_guest_virt_system, |
2dafc6c2 | 5043 | .write_std = kvm_write_guest_virt_system, |
7a036a6f | 5044 | .read_phys = kvm_read_guest_phys_system, |
1871c602 | 5045 | .fetch = kvm_fetch_guest_virt, |
bbd9b64e CO |
5046 | .read_emulated = emulator_read_emulated, |
5047 | .write_emulated = emulator_write_emulated, | |
5048 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
3cb16fe7 | 5049 | .invlpg = emulator_invlpg, |
cf8f70bf GN |
5050 | .pio_in_emulated = emulator_pio_in_emulated, |
5051 | .pio_out_emulated = emulator_pio_out_emulated, | |
1aa36616 AK |
5052 | .get_segment = emulator_get_segment, |
5053 | .set_segment = emulator_set_segment, | |
5951c442 | 5054 | .get_cached_segment_base = emulator_get_cached_segment_base, |
2dafc6c2 | 5055 | .get_gdt = emulator_get_gdt, |
160ce1f1 | 5056 | .get_idt = emulator_get_idt, |
1ac9d0cf AK |
5057 | .set_gdt = emulator_set_gdt, |
5058 | .set_idt = emulator_set_idt, | |
52a46617 GN |
5059 | .get_cr = emulator_get_cr, |
5060 | .set_cr = emulator_set_cr, | |
9c537244 | 5061 | .cpl = emulator_get_cpl, |
35aa5375 GN |
5062 | .get_dr = emulator_get_dr, |
5063 | .set_dr = emulator_set_dr, | |
64d60670 PB |
5064 | .get_smbase = emulator_get_smbase, |
5065 | .set_smbase = emulator_set_smbase, | |
717746e3 AK |
5066 | .set_msr = emulator_set_msr, |
5067 | .get_msr = emulator_get_msr, | |
67f4d428 | 5068 | .check_pmc = emulator_check_pmc, |
222d21aa | 5069 | .read_pmc = emulator_read_pmc, |
6c3287f7 | 5070 | .halt = emulator_halt, |
bcaf5cc5 | 5071 | .wbinvd = emulator_wbinvd, |
d6aa1000 | 5072 | .fix_hypercall = emulator_fix_hypercall, |
5037f6f3 AK |
5073 | .get_fpu = emulator_get_fpu, |
5074 | .put_fpu = emulator_put_fpu, | |
c4f035c6 | 5075 | .intercept = emulator_intercept, |
bdb42f5a | 5076 | .get_cpuid = emulator_get_cpuid, |
801806d9 | 5077 | .set_nmi_mask = emulator_set_nmi_mask, |
bbd9b64e CO |
5078 | }; |
5079 | ||
95cb2295 GN |
5080 | static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |
5081 | { | |
37ccdcbe | 5082 | u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu); |
95cb2295 GN |
5083 | /* |
5084 | * an sti; sti; sequence only disable interrupts for the first | |
5085 | * instruction. So, if the last instruction, be it emulated or | |
5086 | * not, left the system with the INT_STI flag enabled, it | |
5087 | * means that the last instruction is an sti. We should not | |
5088 | * leave the flag on in this case. The same goes for mov ss | |
5089 | */ | |
37ccdcbe PB |
5090 | if (int_shadow & mask) |
5091 | mask = 0; | |
6addfc42 | 5092 | if (unlikely(int_shadow || mask)) { |
95cb2295 | 5093 | kvm_x86_ops->set_interrupt_shadow(vcpu, mask); |
6addfc42 PB |
5094 | if (!mask) |
5095 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
5096 | } | |
95cb2295 GN |
5097 | } |
5098 | ||
ef54bcfe | 5099 | static bool inject_emulated_exception(struct kvm_vcpu *vcpu) |
54b8486f GN |
5100 | { |
5101 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; | |
da9cb575 | 5102 | if (ctxt->exception.vector == PF_VECTOR) |
ef54bcfe PB |
5103 | return kvm_propagate_fault(vcpu, &ctxt->exception); |
5104 | ||
5105 | if (ctxt->exception.error_code_valid) | |
da9cb575 AK |
5106 | kvm_queue_exception_e(vcpu, ctxt->exception.vector, |
5107 | ctxt->exception.error_code); | |
54b8486f | 5108 | else |
da9cb575 | 5109 | kvm_queue_exception(vcpu, ctxt->exception.vector); |
ef54bcfe | 5110 | return false; |
54b8486f GN |
5111 | } |
5112 | ||
8ec4722d MG |
5113 | static void init_emulate_ctxt(struct kvm_vcpu *vcpu) |
5114 | { | |
adf52235 | 5115 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d MG |
5116 | int cs_db, cs_l; |
5117 | ||
8ec4722d MG |
5118 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
5119 | ||
adf52235 TY |
5120 | ctxt->eflags = kvm_get_rflags(vcpu); |
5121 | ctxt->eip = kvm_rip_read(vcpu); | |
5122 | ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : | |
5123 | (ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 : | |
42bf549f | 5124 | (cs_l && is_long_mode(vcpu)) ? X86EMUL_MODE_PROT64 : |
adf52235 TY |
5125 | cs_db ? X86EMUL_MODE_PROT32 : |
5126 | X86EMUL_MODE_PROT16; | |
a584539b | 5127 | BUILD_BUG_ON(HF_GUEST_MASK != X86EMUL_GUEST_MASK); |
64d60670 PB |
5128 | BUILD_BUG_ON(HF_SMM_MASK != X86EMUL_SMM_MASK); |
5129 | BUILD_BUG_ON(HF_SMM_INSIDE_NMI_MASK != X86EMUL_SMM_INSIDE_NMI_MASK); | |
a584539b | 5130 | ctxt->emul_flags = vcpu->arch.hflags; |
adf52235 | 5131 | |
dd856efa | 5132 | init_decode_cache(ctxt); |
7ae441ea | 5133 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; |
8ec4722d MG |
5134 | } |
5135 | ||
71f9833b | 5136 | int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip) |
63995653 | 5137 | { |
9d74191a | 5138 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
63995653 MG |
5139 | int ret; |
5140 | ||
5141 | init_emulate_ctxt(vcpu); | |
5142 | ||
9dac77fa AK |
5143 | ctxt->op_bytes = 2; |
5144 | ctxt->ad_bytes = 2; | |
5145 | ctxt->_eip = ctxt->eip + inc_eip; | |
9d74191a | 5146 | ret = emulate_int_real(ctxt, irq); |
63995653 MG |
5147 | |
5148 | if (ret != X86EMUL_CONTINUE) | |
5149 | return EMULATE_FAIL; | |
5150 | ||
9dac77fa | 5151 | ctxt->eip = ctxt->_eip; |
9d74191a TY |
5152 | kvm_rip_write(vcpu, ctxt->eip); |
5153 | kvm_set_rflags(vcpu, ctxt->eflags); | |
63995653 MG |
5154 | |
5155 | if (irq == NMI_VECTOR) | |
7460fb4a | 5156 | vcpu->arch.nmi_pending = 0; |
63995653 MG |
5157 | else |
5158 | vcpu->arch.interrupt.pending = false; | |
5159 | ||
5160 | return EMULATE_DONE; | |
5161 | } | |
5162 | EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt); | |
5163 | ||
6d77dbfc GN |
5164 | static int handle_emulation_failure(struct kvm_vcpu *vcpu) |
5165 | { | |
fc3a9157 JR |
5166 | int r = EMULATE_DONE; |
5167 | ||
6d77dbfc GN |
5168 | ++vcpu->stat.insn_emulation_fail; |
5169 | trace_kvm_emulate_insn_failed(vcpu); | |
a2b9e6c1 | 5170 | if (!is_guest_mode(vcpu) && kvm_x86_ops->get_cpl(vcpu) == 0) { |
fc3a9157 JR |
5171 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
5172 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
5173 | vcpu->run->internal.ndata = 0; | |
5174 | r = EMULATE_FAIL; | |
5175 | } | |
6d77dbfc | 5176 | kvm_queue_exception(vcpu, UD_VECTOR); |
fc3a9157 JR |
5177 | |
5178 | return r; | |
6d77dbfc GN |
5179 | } |
5180 | ||
93c05d3e | 5181 | static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2, |
991eebf9 GN |
5182 | bool write_fault_to_shadow_pgtable, |
5183 | int emulation_type) | |
a6f177ef | 5184 | { |
95b3cf69 | 5185 | gpa_t gpa = cr2; |
ba049e93 | 5186 | kvm_pfn_t pfn; |
a6f177ef | 5187 | |
991eebf9 GN |
5188 | if (emulation_type & EMULTYPE_NO_REEXECUTE) |
5189 | return false; | |
5190 | ||
95b3cf69 XG |
5191 | if (!vcpu->arch.mmu.direct_map) { |
5192 | /* | |
5193 | * Write permission should be allowed since only | |
5194 | * write access need to be emulated. | |
5195 | */ | |
5196 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
a6f177ef | 5197 | |
95b3cf69 XG |
5198 | /* |
5199 | * If the mapping is invalid in guest, let cpu retry | |
5200 | * it to generate fault. | |
5201 | */ | |
5202 | if (gpa == UNMAPPED_GVA) | |
5203 | return true; | |
5204 | } | |
a6f177ef | 5205 | |
8e3d9d06 XG |
5206 | /* |
5207 | * Do not retry the unhandleable instruction if it faults on the | |
5208 | * readonly host memory, otherwise it will goto a infinite loop: | |
5209 | * retry instruction -> write #PF -> emulation fail -> retry | |
5210 | * instruction -> ... | |
5211 | */ | |
5212 | pfn = gfn_to_pfn(vcpu->kvm, gpa_to_gfn(gpa)); | |
95b3cf69 XG |
5213 | |
5214 | /* | |
5215 | * If the instruction failed on the error pfn, it can not be fixed, | |
5216 | * report the error to userspace. | |
5217 | */ | |
5218 | if (is_error_noslot_pfn(pfn)) | |
5219 | return false; | |
5220 | ||
5221 | kvm_release_pfn_clean(pfn); | |
5222 | ||
5223 | /* The instructions are well-emulated on direct mmu. */ | |
5224 | if (vcpu->arch.mmu.direct_map) { | |
5225 | unsigned int indirect_shadow_pages; | |
5226 | ||
5227 | spin_lock(&vcpu->kvm->mmu_lock); | |
5228 | indirect_shadow_pages = vcpu->kvm->arch.indirect_shadow_pages; | |
5229 | spin_unlock(&vcpu->kvm->mmu_lock); | |
5230 | ||
5231 | if (indirect_shadow_pages) | |
5232 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
5233 | ||
a6f177ef | 5234 | return true; |
8e3d9d06 | 5235 | } |
a6f177ef | 5236 | |
95b3cf69 XG |
5237 | /* |
5238 | * if emulation was due to access to shadowed page table | |
5239 | * and it failed try to unshadow page and re-enter the | |
5240 | * guest to let CPU execute the instruction. | |
5241 | */ | |
5242 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
93c05d3e XG |
5243 | |
5244 | /* | |
5245 | * If the access faults on its page table, it can not | |
5246 | * be fixed by unprotecting shadow page and it should | |
5247 | * be reported to userspace. | |
5248 | */ | |
5249 | return !write_fault_to_shadow_pgtable; | |
a6f177ef GN |
5250 | } |
5251 | ||
1cb3f3ae XG |
5252 | static bool retry_instruction(struct x86_emulate_ctxt *ctxt, |
5253 | unsigned long cr2, int emulation_type) | |
5254 | { | |
5255 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5256 | unsigned long last_retry_eip, last_retry_addr, gpa = cr2; | |
5257 | ||
5258 | last_retry_eip = vcpu->arch.last_retry_eip; | |
5259 | last_retry_addr = vcpu->arch.last_retry_addr; | |
5260 | ||
5261 | /* | |
5262 | * If the emulation is caused by #PF and it is non-page_table | |
5263 | * writing instruction, it means the VM-EXIT is caused by shadow | |
5264 | * page protected, we can zap the shadow page and retry this | |
5265 | * instruction directly. | |
5266 | * | |
5267 | * Note: if the guest uses a non-page-table modifying instruction | |
5268 | * on the PDE that points to the instruction, then we will unmap | |
5269 | * the instruction and go to an infinite loop. So, we cache the | |
5270 | * last retried eip and the last fault address, if we meet the eip | |
5271 | * and the address again, we can break out of the potential infinite | |
5272 | * loop. | |
5273 | */ | |
5274 | vcpu->arch.last_retry_eip = vcpu->arch.last_retry_addr = 0; | |
5275 | ||
5276 | if (!(emulation_type & EMULTYPE_RETRY)) | |
5277 | return false; | |
5278 | ||
5279 | if (x86_page_table_writing_insn(ctxt)) | |
5280 | return false; | |
5281 | ||
5282 | if (ctxt->eip == last_retry_eip && last_retry_addr == cr2) | |
5283 | return false; | |
5284 | ||
5285 | vcpu->arch.last_retry_eip = ctxt->eip; | |
5286 | vcpu->arch.last_retry_addr = cr2; | |
5287 | ||
5288 | if (!vcpu->arch.mmu.direct_map) | |
5289 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
5290 | ||
22368028 | 5291 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); |
1cb3f3ae XG |
5292 | |
5293 | return true; | |
5294 | } | |
5295 | ||
716d51ab GN |
5296 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu); |
5297 | static int complete_emulated_pio(struct kvm_vcpu *vcpu); | |
5298 | ||
64d60670 | 5299 | static void kvm_smm_changed(struct kvm_vcpu *vcpu) |
a584539b | 5300 | { |
64d60670 | 5301 | if (!(vcpu->arch.hflags & HF_SMM_MASK)) { |
660a5d51 PB |
5302 | /* This is a good place to trace that we are exiting SMM. */ |
5303 | trace_kvm_enter_smm(vcpu->vcpu_id, vcpu->arch.smbase, false); | |
5304 | ||
64d60670 PB |
5305 | if (unlikely(vcpu->arch.smi_pending)) { |
5306 | kvm_make_request(KVM_REQ_SMI, vcpu); | |
5307 | vcpu->arch.smi_pending = 0; | |
cd7764fe PB |
5308 | } else { |
5309 | /* Process a latched INIT, if any. */ | |
5310 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
64d60670 PB |
5311 | } |
5312 | } | |
699023e2 PB |
5313 | |
5314 | kvm_mmu_reset_context(vcpu); | |
64d60670 PB |
5315 | } |
5316 | ||
5317 | static void kvm_set_hflags(struct kvm_vcpu *vcpu, unsigned emul_flags) | |
5318 | { | |
5319 | unsigned changed = vcpu->arch.hflags ^ emul_flags; | |
5320 | ||
a584539b | 5321 | vcpu->arch.hflags = emul_flags; |
64d60670 PB |
5322 | |
5323 | if (changed & HF_SMM_MASK) | |
5324 | kvm_smm_changed(vcpu); | |
a584539b PB |
5325 | } |
5326 | ||
4a1e10d5 PB |
5327 | static int kvm_vcpu_check_hw_bp(unsigned long addr, u32 type, u32 dr7, |
5328 | unsigned long *db) | |
5329 | { | |
5330 | u32 dr6 = 0; | |
5331 | int i; | |
5332 | u32 enable, rwlen; | |
5333 | ||
5334 | enable = dr7; | |
5335 | rwlen = dr7 >> 16; | |
5336 | for (i = 0; i < 4; i++, enable >>= 2, rwlen >>= 4) | |
5337 | if ((enable & 3) && (rwlen & 15) == type && db[i] == addr) | |
5338 | dr6 |= (1 << i); | |
5339 | return dr6; | |
5340 | } | |
5341 | ||
6addfc42 | 5342 | static void kvm_vcpu_check_singlestep(struct kvm_vcpu *vcpu, unsigned long rflags, int *r) |
663f4c61 PB |
5343 | { |
5344 | struct kvm_run *kvm_run = vcpu->run; | |
5345 | ||
5346 | /* | |
6addfc42 PB |
5347 | * rflags is the old, "raw" value of the flags. The new value has |
5348 | * not been saved yet. | |
663f4c61 PB |
5349 | * |
5350 | * This is correct even for TF set by the guest, because "the | |
5351 | * processor will not generate this exception after the instruction | |
5352 | * that sets the TF flag". | |
5353 | */ | |
663f4c61 PB |
5354 | if (unlikely(rflags & X86_EFLAGS_TF)) { |
5355 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) { | |
6f43ed01 NA |
5356 | kvm_run->debug.arch.dr6 = DR6_BS | DR6_FIXED_1 | |
5357 | DR6_RTM; | |
663f4c61 PB |
5358 | kvm_run->debug.arch.pc = vcpu->arch.singlestep_rip; |
5359 | kvm_run->debug.arch.exception = DB_VECTOR; | |
5360 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
5361 | *r = EMULATE_USER_EXIT; | |
5362 | } else { | |
5363 | vcpu->arch.emulate_ctxt.eflags &= ~X86_EFLAGS_TF; | |
5364 | /* | |
5365 | * "Certain debug exceptions may clear bit 0-3. The | |
5366 | * remaining contents of the DR6 register are never | |
5367 | * cleared by the processor". | |
5368 | */ | |
5369 | vcpu->arch.dr6 &= ~15; | |
6f43ed01 | 5370 | vcpu->arch.dr6 |= DR6_BS | DR6_RTM; |
663f4c61 PB |
5371 | kvm_queue_exception(vcpu, DB_VECTOR); |
5372 | } | |
5373 | } | |
5374 | } | |
5375 | ||
4a1e10d5 PB |
5376 | static bool kvm_vcpu_check_breakpoint(struct kvm_vcpu *vcpu, int *r) |
5377 | { | |
4a1e10d5 PB |
5378 | if (unlikely(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) && |
5379 | (vcpu->arch.guest_debug_dr7 & DR7_BP_EN_MASK)) { | |
82b32774 NA |
5380 | struct kvm_run *kvm_run = vcpu->run; |
5381 | unsigned long eip = kvm_get_linear_rip(vcpu); | |
5382 | u32 dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
4a1e10d5 PB |
5383 | vcpu->arch.guest_debug_dr7, |
5384 | vcpu->arch.eff_db); | |
5385 | ||
5386 | if (dr6 != 0) { | |
6f43ed01 | 5387 | kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1 | DR6_RTM; |
82b32774 | 5388 | kvm_run->debug.arch.pc = eip; |
4a1e10d5 PB |
5389 | kvm_run->debug.arch.exception = DB_VECTOR; |
5390 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
5391 | *r = EMULATE_USER_EXIT; | |
5392 | return true; | |
5393 | } | |
5394 | } | |
5395 | ||
4161a569 NA |
5396 | if (unlikely(vcpu->arch.dr7 & DR7_BP_EN_MASK) && |
5397 | !(kvm_get_rflags(vcpu) & X86_EFLAGS_RF)) { | |
82b32774 NA |
5398 | unsigned long eip = kvm_get_linear_rip(vcpu); |
5399 | u32 dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
4a1e10d5 PB |
5400 | vcpu->arch.dr7, |
5401 | vcpu->arch.db); | |
5402 | ||
5403 | if (dr6 != 0) { | |
5404 | vcpu->arch.dr6 &= ~15; | |
6f43ed01 | 5405 | vcpu->arch.dr6 |= dr6 | DR6_RTM; |
4a1e10d5 PB |
5406 | kvm_queue_exception(vcpu, DB_VECTOR); |
5407 | *r = EMULATE_DONE; | |
5408 | return true; | |
5409 | } | |
5410 | } | |
5411 | ||
5412 | return false; | |
5413 | } | |
5414 | ||
51d8b661 AP |
5415 | int x86_emulate_instruction(struct kvm_vcpu *vcpu, |
5416 | unsigned long cr2, | |
dc25e89e AP |
5417 | int emulation_type, |
5418 | void *insn, | |
5419 | int insn_len) | |
bbd9b64e | 5420 | { |
95cb2295 | 5421 | int r; |
9d74191a | 5422 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
7ae441ea | 5423 | bool writeback = true; |
93c05d3e | 5424 | bool write_fault_to_spt = vcpu->arch.write_fault_to_shadow_pgtable; |
bbd9b64e | 5425 | |
93c05d3e XG |
5426 | /* |
5427 | * Clear write_fault_to_shadow_pgtable here to ensure it is | |
5428 | * never reused. | |
5429 | */ | |
5430 | vcpu->arch.write_fault_to_shadow_pgtable = false; | |
26eef70c | 5431 | kvm_clear_exception_queue(vcpu); |
8d7d8102 | 5432 | |
571008da | 5433 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
8ec4722d | 5434 | init_emulate_ctxt(vcpu); |
4a1e10d5 PB |
5435 | |
5436 | /* | |
5437 | * We will reenter on the same instruction since | |
5438 | * we do not set complete_userspace_io. This does not | |
5439 | * handle watchpoints yet, those would be handled in | |
5440 | * the emulate_ops. | |
5441 | */ | |
5442 | if (kvm_vcpu_check_breakpoint(vcpu, &r)) | |
5443 | return r; | |
5444 | ||
9d74191a TY |
5445 | ctxt->interruptibility = 0; |
5446 | ctxt->have_exception = false; | |
e0ad0b47 | 5447 | ctxt->exception.vector = -1; |
9d74191a | 5448 | ctxt->perm_ok = false; |
bbd9b64e | 5449 | |
b51e974f | 5450 | ctxt->ud = emulation_type & EMULTYPE_TRAP_UD; |
4005996e | 5451 | |
9d74191a | 5452 | r = x86_decode_insn(ctxt, insn, insn_len); |
bbd9b64e | 5453 | |
e46479f8 | 5454 | trace_kvm_emulate_insn_start(vcpu); |
f2b5756b | 5455 | ++vcpu->stat.insn_emulation; |
1d2887e2 | 5456 | if (r != EMULATION_OK) { |
4005996e AK |
5457 | if (emulation_type & EMULTYPE_TRAP_UD) |
5458 | return EMULATE_FAIL; | |
991eebf9 GN |
5459 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
5460 | emulation_type)) | |
bbd9b64e | 5461 | return EMULATE_DONE; |
6d77dbfc GN |
5462 | if (emulation_type & EMULTYPE_SKIP) |
5463 | return EMULATE_FAIL; | |
5464 | return handle_emulation_failure(vcpu); | |
bbd9b64e CO |
5465 | } |
5466 | } | |
5467 | ||
ba8afb6b | 5468 | if (emulation_type & EMULTYPE_SKIP) { |
9dac77fa | 5469 | kvm_rip_write(vcpu, ctxt->_eip); |
bb663c7a NA |
5470 | if (ctxt->eflags & X86_EFLAGS_RF) |
5471 | kvm_set_rflags(vcpu, ctxt->eflags & ~X86_EFLAGS_RF); | |
ba8afb6b GN |
5472 | return EMULATE_DONE; |
5473 | } | |
5474 | ||
1cb3f3ae XG |
5475 | if (retry_instruction(ctxt, cr2, emulation_type)) |
5476 | return EMULATE_DONE; | |
5477 | ||
7ae441ea | 5478 | /* this is needed for vmware backdoor interface to work since it |
4d2179e1 | 5479 | changes registers values during IO operation */ |
7ae441ea GN |
5480 | if (vcpu->arch.emulate_regs_need_sync_from_vcpu) { |
5481 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; | |
dd856efa | 5482 | emulator_invalidate_register_cache(ctxt); |
7ae441ea | 5483 | } |
4d2179e1 | 5484 | |
5cd21917 | 5485 | restart: |
9d74191a | 5486 | r = x86_emulate_insn(ctxt); |
bbd9b64e | 5487 | |
775fde86 JR |
5488 | if (r == EMULATION_INTERCEPTED) |
5489 | return EMULATE_DONE; | |
5490 | ||
d2ddd1c4 | 5491 | if (r == EMULATION_FAILED) { |
991eebf9 GN |
5492 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
5493 | emulation_type)) | |
c3cd7ffa GN |
5494 | return EMULATE_DONE; |
5495 | ||
6d77dbfc | 5496 | return handle_emulation_failure(vcpu); |
bbd9b64e CO |
5497 | } |
5498 | ||
9d74191a | 5499 | if (ctxt->have_exception) { |
d2ddd1c4 | 5500 | r = EMULATE_DONE; |
ef54bcfe PB |
5501 | if (inject_emulated_exception(vcpu)) |
5502 | return r; | |
d2ddd1c4 | 5503 | } else if (vcpu->arch.pio.count) { |
0912c977 PB |
5504 | if (!vcpu->arch.pio.in) { |
5505 | /* FIXME: return into emulator if single-stepping. */ | |
3457e419 | 5506 | vcpu->arch.pio.count = 0; |
0912c977 | 5507 | } else { |
7ae441ea | 5508 | writeback = false; |
716d51ab GN |
5509 | vcpu->arch.complete_userspace_io = complete_emulated_pio; |
5510 | } | |
ac0a48c3 | 5511 | r = EMULATE_USER_EXIT; |
7ae441ea GN |
5512 | } else if (vcpu->mmio_needed) { |
5513 | if (!vcpu->mmio_is_write) | |
5514 | writeback = false; | |
ac0a48c3 | 5515 | r = EMULATE_USER_EXIT; |
716d51ab | 5516 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; |
7ae441ea | 5517 | } else if (r == EMULATION_RESTART) |
5cd21917 | 5518 | goto restart; |
d2ddd1c4 GN |
5519 | else |
5520 | r = EMULATE_DONE; | |
f850e2e6 | 5521 | |
7ae441ea | 5522 | if (writeback) { |
6addfc42 | 5523 | unsigned long rflags = kvm_x86_ops->get_rflags(vcpu); |
9d74191a | 5524 | toggle_interruptibility(vcpu, ctxt->interruptibility); |
7ae441ea | 5525 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
a584539b PB |
5526 | if (vcpu->arch.hflags != ctxt->emul_flags) |
5527 | kvm_set_hflags(vcpu, ctxt->emul_flags); | |
9d74191a | 5528 | kvm_rip_write(vcpu, ctxt->eip); |
663f4c61 | 5529 | if (r == EMULATE_DONE) |
6addfc42 | 5530 | kvm_vcpu_check_singlestep(vcpu, rflags, &r); |
38827dbd NA |
5531 | if (!ctxt->have_exception || |
5532 | exception_type(ctxt->exception.vector) == EXCPT_TRAP) | |
5533 | __kvm_set_rflags(vcpu, ctxt->eflags); | |
6addfc42 PB |
5534 | |
5535 | /* | |
5536 | * For STI, interrupts are shadowed; so KVM_REQ_EVENT will | |
5537 | * do nothing, and it will be requested again as soon as | |
5538 | * the shadow expires. But we still need to check here, | |
5539 | * because POPF has no interrupt shadow. | |
5540 | */ | |
5541 | if (unlikely((ctxt->eflags & ~rflags) & X86_EFLAGS_IF)) | |
5542 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
7ae441ea GN |
5543 | } else |
5544 | vcpu->arch.emulate_regs_need_sync_to_vcpu = true; | |
e85d28f8 GN |
5545 | |
5546 | return r; | |
de7d789a | 5547 | } |
51d8b661 | 5548 | EXPORT_SYMBOL_GPL(x86_emulate_instruction); |
de7d789a | 5549 | |
cf8f70bf | 5550 | int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port) |
de7d789a | 5551 | { |
cf8f70bf | 5552 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
ca1d4a9e AK |
5553 | int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt, |
5554 | size, port, &val, 1); | |
cf8f70bf | 5555 | /* do not return to emulator after return from userspace */ |
7972995b | 5556 | vcpu->arch.pio.count = 0; |
de7d789a CO |
5557 | return ret; |
5558 | } | |
cf8f70bf | 5559 | EXPORT_SYMBOL_GPL(kvm_fast_pio_out); |
de7d789a | 5560 | |
8cfdc000 ZA |
5561 | static void tsc_bad(void *info) |
5562 | { | |
0a3aee0d | 5563 | __this_cpu_write(cpu_tsc_khz, 0); |
8cfdc000 ZA |
5564 | } |
5565 | ||
5566 | static void tsc_khz_changed(void *data) | |
c8076604 | 5567 | { |
8cfdc000 ZA |
5568 | struct cpufreq_freqs *freq = data; |
5569 | unsigned long khz = 0; | |
5570 | ||
5571 | if (data) | |
5572 | khz = freq->new; | |
5573 | else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) | |
5574 | khz = cpufreq_quick_get(raw_smp_processor_id()); | |
5575 | if (!khz) | |
5576 | khz = tsc_khz; | |
0a3aee0d | 5577 | __this_cpu_write(cpu_tsc_khz, khz); |
c8076604 GH |
5578 | } |
5579 | ||
c8076604 GH |
5580 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
5581 | void *data) | |
5582 | { | |
5583 | struct cpufreq_freqs *freq = data; | |
5584 | struct kvm *kvm; | |
5585 | struct kvm_vcpu *vcpu; | |
5586 | int i, send_ipi = 0; | |
5587 | ||
8cfdc000 ZA |
5588 | /* |
5589 | * We allow guests to temporarily run on slowing clocks, | |
5590 | * provided we notify them after, or to run on accelerating | |
5591 | * clocks, provided we notify them before. Thus time never | |
5592 | * goes backwards. | |
5593 | * | |
5594 | * However, we have a problem. We can't atomically update | |
5595 | * the frequency of a given CPU from this function; it is | |
5596 | * merely a notifier, which can be called from any CPU. | |
5597 | * Changing the TSC frequency at arbitrary points in time | |
5598 | * requires a recomputation of local variables related to | |
5599 | * the TSC for each VCPU. We must flag these local variables | |
5600 | * to be updated and be sure the update takes place with the | |
5601 | * new frequency before any guests proceed. | |
5602 | * | |
5603 | * Unfortunately, the combination of hotplug CPU and frequency | |
5604 | * change creates an intractable locking scenario; the order | |
5605 | * of when these callouts happen is undefined with respect to | |
5606 | * CPU hotplug, and they can race with each other. As such, | |
5607 | * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is | |
5608 | * undefined; you can actually have a CPU frequency change take | |
5609 | * place in between the computation of X and the setting of the | |
5610 | * variable. To protect against this problem, all updates of | |
5611 | * the per_cpu tsc_khz variable are done in an interrupt | |
5612 | * protected IPI, and all callers wishing to update the value | |
5613 | * must wait for a synchronous IPI to complete (which is trivial | |
5614 | * if the caller is on the CPU already). This establishes the | |
5615 | * necessary total order on variable updates. | |
5616 | * | |
5617 | * Note that because a guest time update may take place | |
5618 | * anytime after the setting of the VCPU's request bit, the | |
5619 | * correct TSC value must be set before the request. However, | |
5620 | * to ensure the update actually makes it to any guest which | |
5621 | * starts running in hardware virtualization between the set | |
5622 | * and the acquisition of the spinlock, we must also ping the | |
5623 | * CPU after setting the request bit. | |
5624 | * | |
5625 | */ | |
5626 | ||
c8076604 GH |
5627 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
5628 | return 0; | |
5629 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
5630 | return 0; | |
8cfdc000 ZA |
5631 | |
5632 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); | |
c8076604 | 5633 | |
2f303b74 | 5634 | spin_lock(&kvm_lock); |
c8076604 | 5635 | list_for_each_entry(kvm, &vm_list, vm_list) { |
988a2cae | 5636 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
5637 | if (vcpu->cpu != freq->cpu) |
5638 | continue; | |
c285545f | 5639 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
c8076604 | 5640 | if (vcpu->cpu != smp_processor_id()) |
8cfdc000 | 5641 | send_ipi = 1; |
c8076604 GH |
5642 | } |
5643 | } | |
2f303b74 | 5644 | spin_unlock(&kvm_lock); |
c8076604 GH |
5645 | |
5646 | if (freq->old < freq->new && send_ipi) { | |
5647 | /* | |
5648 | * We upscale the frequency. Must make the guest | |
5649 | * doesn't see old kvmclock values while running with | |
5650 | * the new frequency, otherwise we risk the guest sees | |
5651 | * time go backwards. | |
5652 | * | |
5653 | * In case we update the frequency for another cpu | |
5654 | * (which might be in guest context) send an interrupt | |
5655 | * to kick the cpu out of guest context. Next time | |
5656 | * guest context is entered kvmclock will be updated, | |
5657 | * so the guest will not see stale values. | |
5658 | */ | |
8cfdc000 | 5659 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); |
c8076604 GH |
5660 | } |
5661 | return 0; | |
5662 | } | |
5663 | ||
5664 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
8cfdc000 ZA |
5665 | .notifier_call = kvmclock_cpufreq_notifier |
5666 | }; | |
5667 | ||
5668 | static int kvmclock_cpu_notifier(struct notifier_block *nfb, | |
5669 | unsigned long action, void *hcpu) | |
5670 | { | |
5671 | unsigned int cpu = (unsigned long)hcpu; | |
5672 | ||
5673 | switch (action) { | |
5674 | case CPU_ONLINE: | |
5675 | case CPU_DOWN_FAILED: | |
5676 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
5677 | break; | |
5678 | case CPU_DOWN_PREPARE: | |
5679 | smp_call_function_single(cpu, tsc_bad, NULL, 1); | |
5680 | break; | |
5681 | } | |
5682 | return NOTIFY_OK; | |
5683 | } | |
5684 | ||
5685 | static struct notifier_block kvmclock_cpu_notifier_block = { | |
5686 | .notifier_call = kvmclock_cpu_notifier, | |
5687 | .priority = -INT_MAX | |
c8076604 GH |
5688 | }; |
5689 | ||
b820cc0c ZA |
5690 | static void kvm_timer_init(void) |
5691 | { | |
5692 | int cpu; | |
5693 | ||
c285545f | 5694 | max_tsc_khz = tsc_khz; |
460dd42e SB |
5695 | |
5696 | cpu_notifier_register_begin(); | |
b820cc0c | 5697 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
c285545f ZA |
5698 | #ifdef CONFIG_CPU_FREQ |
5699 | struct cpufreq_policy policy; | |
5700 | memset(&policy, 0, sizeof(policy)); | |
3e26f230 AK |
5701 | cpu = get_cpu(); |
5702 | cpufreq_get_policy(&policy, cpu); | |
c285545f ZA |
5703 | if (policy.cpuinfo.max_freq) |
5704 | max_tsc_khz = policy.cpuinfo.max_freq; | |
3e26f230 | 5705 | put_cpu(); |
c285545f | 5706 | #endif |
b820cc0c ZA |
5707 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
5708 | CPUFREQ_TRANSITION_NOTIFIER); | |
5709 | } | |
c285545f | 5710 | pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz); |
8cfdc000 ZA |
5711 | for_each_online_cpu(cpu) |
5712 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
460dd42e SB |
5713 | |
5714 | __register_hotcpu_notifier(&kvmclock_cpu_notifier_block); | |
5715 | cpu_notifier_register_done(); | |
5716 | ||
b820cc0c ZA |
5717 | } |
5718 | ||
ff9d07a0 ZY |
5719 | static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
5720 | ||
f5132b01 | 5721 | int kvm_is_in_guest(void) |
ff9d07a0 | 5722 | { |
086c9855 | 5723 | return __this_cpu_read(current_vcpu) != NULL; |
ff9d07a0 ZY |
5724 | } |
5725 | ||
5726 | static int kvm_is_user_mode(void) | |
5727 | { | |
5728 | int user_mode = 3; | |
dcf46b94 | 5729 | |
086c9855 AS |
5730 | if (__this_cpu_read(current_vcpu)) |
5731 | user_mode = kvm_x86_ops->get_cpl(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 5732 | |
ff9d07a0 ZY |
5733 | return user_mode != 0; |
5734 | } | |
5735 | ||
5736 | static unsigned long kvm_get_guest_ip(void) | |
5737 | { | |
5738 | unsigned long ip = 0; | |
dcf46b94 | 5739 | |
086c9855 AS |
5740 | if (__this_cpu_read(current_vcpu)) |
5741 | ip = kvm_rip_read(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 5742 | |
ff9d07a0 ZY |
5743 | return ip; |
5744 | } | |
5745 | ||
5746 | static struct perf_guest_info_callbacks kvm_guest_cbs = { | |
5747 | .is_in_guest = kvm_is_in_guest, | |
5748 | .is_user_mode = kvm_is_user_mode, | |
5749 | .get_guest_ip = kvm_get_guest_ip, | |
5750 | }; | |
5751 | ||
5752 | void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) | |
5753 | { | |
086c9855 | 5754 | __this_cpu_write(current_vcpu, vcpu); |
ff9d07a0 ZY |
5755 | } |
5756 | EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); | |
5757 | ||
5758 | void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) | |
5759 | { | |
086c9855 | 5760 | __this_cpu_write(current_vcpu, NULL); |
ff9d07a0 ZY |
5761 | } |
5762 | EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); | |
5763 | ||
ce88decf XG |
5764 | static void kvm_set_mmio_spte_mask(void) |
5765 | { | |
5766 | u64 mask; | |
5767 | int maxphyaddr = boot_cpu_data.x86_phys_bits; | |
5768 | ||
5769 | /* | |
5770 | * Set the reserved bits and the present bit of an paging-structure | |
5771 | * entry to generate page fault with PFER.RSV = 1. | |
5772 | */ | |
885032b9 | 5773 | /* Mask the reserved physical address bits. */ |
d1431483 | 5774 | mask = rsvd_bits(maxphyaddr, 51); |
885032b9 XG |
5775 | |
5776 | /* Bit 62 is always reserved for 32bit host. */ | |
5777 | mask |= 0x3ull << 62; | |
5778 | ||
5779 | /* Set the present bit. */ | |
ce88decf XG |
5780 | mask |= 1ull; |
5781 | ||
5782 | #ifdef CONFIG_X86_64 | |
5783 | /* | |
5784 | * If reserved bit is not supported, clear the present bit to disable | |
5785 | * mmio page fault. | |
5786 | */ | |
5787 | if (maxphyaddr == 52) | |
5788 | mask &= ~1ull; | |
5789 | #endif | |
5790 | ||
5791 | kvm_mmu_set_mmio_spte_mask(mask); | |
5792 | } | |
5793 | ||
16e8d74d MT |
5794 | #ifdef CONFIG_X86_64 |
5795 | static void pvclock_gtod_update_fn(struct work_struct *work) | |
5796 | { | |
d828199e MT |
5797 | struct kvm *kvm; |
5798 | ||
5799 | struct kvm_vcpu *vcpu; | |
5800 | int i; | |
5801 | ||
2f303b74 | 5802 | spin_lock(&kvm_lock); |
d828199e MT |
5803 | list_for_each_entry(kvm, &vm_list, vm_list) |
5804 | kvm_for_each_vcpu(i, vcpu, kvm) | |
105b21bb | 5805 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
d828199e | 5806 | atomic_set(&kvm_guest_has_master_clock, 0); |
2f303b74 | 5807 | spin_unlock(&kvm_lock); |
16e8d74d MT |
5808 | } |
5809 | ||
5810 | static DECLARE_WORK(pvclock_gtod_work, pvclock_gtod_update_fn); | |
5811 | ||
5812 | /* | |
5813 | * Notification about pvclock gtod data update. | |
5814 | */ | |
5815 | static int pvclock_gtod_notify(struct notifier_block *nb, unsigned long unused, | |
5816 | void *priv) | |
5817 | { | |
5818 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
5819 | struct timekeeper *tk = priv; | |
5820 | ||
5821 | update_pvclock_gtod(tk); | |
5822 | ||
5823 | /* disable master clock if host does not trust, or does not | |
5824 | * use, TSC clocksource | |
5825 | */ | |
5826 | if (gtod->clock.vclock_mode != VCLOCK_TSC && | |
5827 | atomic_read(&kvm_guest_has_master_clock) != 0) | |
5828 | queue_work(system_long_wq, &pvclock_gtod_work); | |
5829 | ||
5830 | return 0; | |
5831 | } | |
5832 | ||
5833 | static struct notifier_block pvclock_gtod_notifier = { | |
5834 | .notifier_call = pvclock_gtod_notify, | |
5835 | }; | |
5836 | #endif | |
5837 | ||
f8c16bba | 5838 | int kvm_arch_init(void *opaque) |
043405e1 | 5839 | { |
b820cc0c | 5840 | int r; |
6b61edf7 | 5841 | struct kvm_x86_ops *ops = opaque; |
f8c16bba | 5842 | |
f8c16bba ZX |
5843 | if (kvm_x86_ops) { |
5844 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
5845 | r = -EEXIST; |
5846 | goto out; | |
f8c16bba ZX |
5847 | } |
5848 | ||
5849 | if (!ops->cpu_has_kvm_support()) { | |
5850 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
5851 | r = -EOPNOTSUPP; |
5852 | goto out; | |
f8c16bba ZX |
5853 | } |
5854 | if (ops->disabled_by_bios()) { | |
5855 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
5856 | r = -EOPNOTSUPP; |
5857 | goto out; | |
f8c16bba ZX |
5858 | } |
5859 | ||
013f6a5d MT |
5860 | r = -ENOMEM; |
5861 | shared_msrs = alloc_percpu(struct kvm_shared_msrs); | |
5862 | if (!shared_msrs) { | |
5863 | printk(KERN_ERR "kvm: failed to allocate percpu kvm_shared_msrs\n"); | |
5864 | goto out; | |
5865 | } | |
5866 | ||
97db56ce AK |
5867 | r = kvm_mmu_module_init(); |
5868 | if (r) | |
013f6a5d | 5869 | goto out_free_percpu; |
97db56ce | 5870 | |
ce88decf | 5871 | kvm_set_mmio_spte_mask(); |
97db56ce | 5872 | |
f8c16bba | 5873 | kvm_x86_ops = ops; |
920c8377 | 5874 | |
7b52345e | 5875 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, |
4b12f0de | 5876 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
c8076604 | 5877 | |
b820cc0c | 5878 | kvm_timer_init(); |
c8076604 | 5879 | |
ff9d07a0 ZY |
5880 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
5881 | ||
d366bf7e | 5882 | if (boot_cpu_has(X86_FEATURE_XSAVE)) |
2acf923e DC |
5883 | host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); |
5884 | ||
c5cc421b | 5885 | kvm_lapic_init(); |
16e8d74d MT |
5886 | #ifdef CONFIG_X86_64 |
5887 | pvclock_gtod_register_notifier(&pvclock_gtod_notifier); | |
5888 | #endif | |
5889 | ||
f8c16bba | 5890 | return 0; |
56c6d28a | 5891 | |
013f6a5d MT |
5892 | out_free_percpu: |
5893 | free_percpu(shared_msrs); | |
56c6d28a | 5894 | out: |
56c6d28a | 5895 | return r; |
043405e1 | 5896 | } |
8776e519 | 5897 | |
f8c16bba ZX |
5898 | void kvm_arch_exit(void) |
5899 | { | |
ff9d07a0 ZY |
5900 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
5901 | ||
888d256e JK |
5902 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
5903 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
5904 | CPUFREQ_TRANSITION_NOTIFIER); | |
8cfdc000 | 5905 | unregister_hotcpu_notifier(&kvmclock_cpu_notifier_block); |
16e8d74d MT |
5906 | #ifdef CONFIG_X86_64 |
5907 | pvclock_gtod_unregister_notifier(&pvclock_gtod_notifier); | |
5908 | #endif | |
f8c16bba | 5909 | kvm_x86_ops = NULL; |
56c6d28a | 5910 | kvm_mmu_module_exit(); |
013f6a5d | 5911 | free_percpu(shared_msrs); |
56c6d28a | 5912 | } |
f8c16bba | 5913 | |
5cb56059 | 5914 | int kvm_vcpu_halt(struct kvm_vcpu *vcpu) |
8776e519 HB |
5915 | { |
5916 | ++vcpu->stat.halt_exits; | |
35754c98 | 5917 | if (lapic_in_kernel(vcpu)) { |
a4535290 | 5918 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
5919 | return 1; |
5920 | } else { | |
5921 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
5922 | return 0; | |
5923 | } | |
5924 | } | |
5cb56059 JS |
5925 | EXPORT_SYMBOL_GPL(kvm_vcpu_halt); |
5926 | ||
5927 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) | |
5928 | { | |
5929 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
5930 | return kvm_vcpu_halt(vcpu); | |
5931 | } | |
8776e519 HB |
5932 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); |
5933 | ||
6aef266c SV |
5934 | /* |
5935 | * kvm_pv_kick_cpu_op: Kick a vcpu. | |
5936 | * | |
5937 | * @apicid - apicid of vcpu to be kicked. | |
5938 | */ | |
5939 | static void kvm_pv_kick_cpu_op(struct kvm *kvm, unsigned long flags, int apicid) | |
5940 | { | |
24d2166b | 5941 | struct kvm_lapic_irq lapic_irq; |
6aef266c | 5942 | |
24d2166b R |
5943 | lapic_irq.shorthand = 0; |
5944 | lapic_irq.dest_mode = 0; | |
5945 | lapic_irq.dest_id = apicid; | |
93bbf0b8 | 5946 | lapic_irq.msi_redir_hint = false; |
6aef266c | 5947 | |
24d2166b | 5948 | lapic_irq.delivery_mode = APIC_DM_REMRD; |
795a149e | 5949 | kvm_irq_delivery_to_apic(kvm, NULL, &lapic_irq, NULL); |
6aef266c SV |
5950 | } |
5951 | ||
d62caabb AS |
5952 | void kvm_vcpu_deactivate_apicv(struct kvm_vcpu *vcpu) |
5953 | { | |
5954 | vcpu->arch.apicv_active = false; | |
5955 | kvm_x86_ops->refresh_apicv_exec_ctrl(vcpu); | |
5956 | } | |
5957 | ||
8776e519 HB |
5958 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
5959 | { | |
5960 | unsigned long nr, a0, a1, a2, a3, ret; | |
a449c7aa | 5961 | int op_64_bit, r = 1; |
8776e519 | 5962 | |
5cb56059 JS |
5963 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
5964 | ||
55cd8e5a GN |
5965 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
5966 | return kvm_hv_hypercall(vcpu); | |
5967 | ||
5fdbf976 MT |
5968 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
5969 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
5970 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5971 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
5972 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 5973 | |
229456fc | 5974 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 5975 | |
a449c7aa NA |
5976 | op_64_bit = is_64_bit_mode(vcpu); |
5977 | if (!op_64_bit) { | |
8776e519 HB |
5978 | nr &= 0xFFFFFFFF; |
5979 | a0 &= 0xFFFFFFFF; | |
5980 | a1 &= 0xFFFFFFFF; | |
5981 | a2 &= 0xFFFFFFFF; | |
5982 | a3 &= 0xFFFFFFFF; | |
5983 | } | |
5984 | ||
07708c4a JK |
5985 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
5986 | ret = -KVM_EPERM; | |
5987 | goto out; | |
5988 | } | |
5989 | ||
8776e519 | 5990 | switch (nr) { |
b93463aa AK |
5991 | case KVM_HC_VAPIC_POLL_IRQ: |
5992 | ret = 0; | |
5993 | break; | |
6aef266c SV |
5994 | case KVM_HC_KICK_CPU: |
5995 | kvm_pv_kick_cpu_op(vcpu->kvm, a0, a1); | |
5996 | ret = 0; | |
5997 | break; | |
8776e519 HB |
5998 | default: |
5999 | ret = -KVM_ENOSYS; | |
6000 | break; | |
6001 | } | |
07708c4a | 6002 | out: |
a449c7aa NA |
6003 | if (!op_64_bit) |
6004 | ret = (u32)ret; | |
5fdbf976 | 6005 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 6006 | ++vcpu->stat.hypercalls; |
2f333bcb | 6007 | return r; |
8776e519 HB |
6008 | } |
6009 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
6010 | ||
b6785def | 6011 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) |
8776e519 | 6012 | { |
d6aa1000 | 6013 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
8776e519 | 6014 | char instruction[3]; |
5fdbf976 | 6015 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 6016 | |
8776e519 | 6017 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 6018 | |
9d74191a | 6019 | return emulator_write_emulated(ctxt, rip, instruction, 3, NULL); |
8776e519 HB |
6020 | } |
6021 | ||
851ba692 | 6022 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 6023 | { |
782d422b MG |
6024 | return vcpu->run->request_interrupt_window && |
6025 | likely(!pic_in_kernel(vcpu->kvm)); | |
b6c7a5dc HB |
6026 | } |
6027 | ||
851ba692 | 6028 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 6029 | { |
851ba692 AK |
6030 | struct kvm_run *kvm_run = vcpu->run; |
6031 | ||
91586a3b | 6032 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
f077825a | 6033 | kvm_run->flags = is_smm(vcpu) ? KVM_RUN_X86_SMM : 0; |
2d3ad1f4 | 6034 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 6035 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
127a457a MG |
6036 | kvm_run->ready_for_interrupt_injection = |
6037 | pic_in_kernel(vcpu->kvm) || | |
782d422b | 6038 | kvm_vcpu_ready_for_interrupt_injection(vcpu); |
b6c7a5dc HB |
6039 | } |
6040 | ||
95ba8273 GN |
6041 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
6042 | { | |
6043 | int max_irr, tpr; | |
6044 | ||
6045 | if (!kvm_x86_ops->update_cr8_intercept) | |
6046 | return; | |
6047 | ||
bce87cce | 6048 | if (!lapic_in_kernel(vcpu)) |
88c808fd AK |
6049 | return; |
6050 | ||
d62caabb AS |
6051 | if (vcpu->arch.apicv_active) |
6052 | return; | |
6053 | ||
8db3baa2 GN |
6054 | if (!vcpu->arch.apic->vapic_addr) |
6055 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
6056 | else | |
6057 | max_irr = -1; | |
95ba8273 GN |
6058 | |
6059 | if (max_irr != -1) | |
6060 | max_irr >>= 4; | |
6061 | ||
6062 | tpr = kvm_lapic_get_cr8(vcpu); | |
6063 | ||
6064 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
6065 | } | |
6066 | ||
b6b8a145 | 6067 | static int inject_pending_event(struct kvm_vcpu *vcpu, bool req_int_win) |
95ba8273 | 6068 | { |
b6b8a145 JK |
6069 | int r; |
6070 | ||
95ba8273 | 6071 | /* try to reinject previous events if any */ |
b59bb7bd | 6072 | if (vcpu->arch.exception.pending) { |
5c1c85d0 AK |
6073 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
6074 | vcpu->arch.exception.has_error_code, | |
6075 | vcpu->arch.exception.error_code); | |
d6e8c854 NA |
6076 | |
6077 | if (exception_type(vcpu->arch.exception.nr) == EXCPT_FAULT) | |
6078 | __kvm_set_rflags(vcpu, kvm_get_rflags(vcpu) | | |
6079 | X86_EFLAGS_RF); | |
6080 | ||
6bdf0662 NA |
6081 | if (vcpu->arch.exception.nr == DB_VECTOR && |
6082 | (vcpu->arch.dr7 & DR7_GD)) { | |
6083 | vcpu->arch.dr7 &= ~DR7_GD; | |
6084 | kvm_update_dr7(vcpu); | |
6085 | } | |
6086 | ||
b59bb7bd GN |
6087 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
6088 | vcpu->arch.exception.has_error_code, | |
ce7ddec4 JR |
6089 | vcpu->arch.exception.error_code, |
6090 | vcpu->arch.exception.reinject); | |
b6b8a145 | 6091 | return 0; |
b59bb7bd GN |
6092 | } |
6093 | ||
95ba8273 GN |
6094 | if (vcpu->arch.nmi_injected) { |
6095 | kvm_x86_ops->set_nmi(vcpu); | |
b6b8a145 | 6096 | return 0; |
95ba8273 GN |
6097 | } |
6098 | ||
6099 | if (vcpu->arch.interrupt.pending) { | |
66fd3f7f | 6100 | kvm_x86_ops->set_irq(vcpu); |
b6b8a145 JK |
6101 | return 0; |
6102 | } | |
6103 | ||
6104 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { | |
6105 | r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); | |
6106 | if (r != 0) | |
6107 | return r; | |
95ba8273 GN |
6108 | } |
6109 | ||
6110 | /* try to inject new event if pending */ | |
321c5658 YS |
6111 | if (vcpu->arch.nmi_pending && kvm_x86_ops->nmi_allowed(vcpu)) { |
6112 | --vcpu->arch.nmi_pending; | |
6113 | vcpu->arch.nmi_injected = true; | |
6114 | kvm_x86_ops->set_nmi(vcpu); | |
c7c9c56c | 6115 | } else if (kvm_cpu_has_injectable_intr(vcpu)) { |
9242b5b6 BD |
6116 | /* |
6117 | * Because interrupts can be injected asynchronously, we are | |
6118 | * calling check_nested_events again here to avoid a race condition. | |
6119 | * See https://lkml.org/lkml/2014/7/2/60 for discussion about this | |
6120 | * proposal and current concerns. Perhaps we should be setting | |
6121 | * KVM_REQ_EVENT only on certain events and not unconditionally? | |
6122 | */ | |
6123 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { | |
6124 | r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); | |
6125 | if (r != 0) | |
6126 | return r; | |
6127 | } | |
95ba8273 | 6128 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { |
66fd3f7f GN |
6129 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
6130 | false); | |
6131 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
6132 | } |
6133 | } | |
b6b8a145 | 6134 | return 0; |
95ba8273 GN |
6135 | } |
6136 | ||
7460fb4a AK |
6137 | static void process_nmi(struct kvm_vcpu *vcpu) |
6138 | { | |
6139 | unsigned limit = 2; | |
6140 | ||
6141 | /* | |
6142 | * x86 is limited to one NMI running, and one NMI pending after it. | |
6143 | * If an NMI is already in progress, limit further NMIs to just one. | |
6144 | * Otherwise, allow two (and we'll inject the first one immediately). | |
6145 | */ | |
6146 | if (kvm_x86_ops->get_nmi_mask(vcpu) || vcpu->arch.nmi_injected) | |
6147 | limit = 1; | |
6148 | ||
6149 | vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0); | |
6150 | vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit); | |
6151 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
6152 | } | |
6153 | ||
660a5d51 PB |
6154 | #define put_smstate(type, buf, offset, val) \ |
6155 | *(type *)((buf) + (offset) - 0x7e00) = val | |
6156 | ||
6157 | static u32 process_smi_get_segment_flags(struct kvm_segment *seg) | |
6158 | { | |
6159 | u32 flags = 0; | |
6160 | flags |= seg->g << 23; | |
6161 | flags |= seg->db << 22; | |
6162 | flags |= seg->l << 21; | |
6163 | flags |= seg->avl << 20; | |
6164 | flags |= seg->present << 15; | |
6165 | flags |= seg->dpl << 13; | |
6166 | flags |= seg->s << 12; | |
6167 | flags |= seg->type << 8; | |
6168 | return flags; | |
6169 | } | |
6170 | ||
6171 | static void process_smi_save_seg_32(struct kvm_vcpu *vcpu, char *buf, int n) | |
6172 | { | |
6173 | struct kvm_segment seg; | |
6174 | int offset; | |
6175 | ||
6176 | kvm_get_segment(vcpu, &seg, n); | |
6177 | put_smstate(u32, buf, 0x7fa8 + n * 4, seg.selector); | |
6178 | ||
6179 | if (n < 3) | |
6180 | offset = 0x7f84 + n * 12; | |
6181 | else | |
6182 | offset = 0x7f2c + (n - 3) * 12; | |
6183 | ||
6184 | put_smstate(u32, buf, offset + 8, seg.base); | |
6185 | put_smstate(u32, buf, offset + 4, seg.limit); | |
6186 | put_smstate(u32, buf, offset, process_smi_get_segment_flags(&seg)); | |
6187 | } | |
6188 | ||
efbb288a | 6189 | #ifdef CONFIG_X86_64 |
660a5d51 PB |
6190 | static void process_smi_save_seg_64(struct kvm_vcpu *vcpu, char *buf, int n) |
6191 | { | |
6192 | struct kvm_segment seg; | |
6193 | int offset; | |
6194 | u16 flags; | |
6195 | ||
6196 | kvm_get_segment(vcpu, &seg, n); | |
6197 | offset = 0x7e00 + n * 16; | |
6198 | ||
6199 | flags = process_smi_get_segment_flags(&seg) >> 8; | |
6200 | put_smstate(u16, buf, offset, seg.selector); | |
6201 | put_smstate(u16, buf, offset + 2, flags); | |
6202 | put_smstate(u32, buf, offset + 4, seg.limit); | |
6203 | put_smstate(u64, buf, offset + 8, seg.base); | |
6204 | } | |
efbb288a | 6205 | #endif |
660a5d51 PB |
6206 | |
6207 | static void process_smi_save_state_32(struct kvm_vcpu *vcpu, char *buf) | |
6208 | { | |
6209 | struct desc_ptr dt; | |
6210 | struct kvm_segment seg; | |
6211 | unsigned long val; | |
6212 | int i; | |
6213 | ||
6214 | put_smstate(u32, buf, 0x7ffc, kvm_read_cr0(vcpu)); | |
6215 | put_smstate(u32, buf, 0x7ff8, kvm_read_cr3(vcpu)); | |
6216 | put_smstate(u32, buf, 0x7ff4, kvm_get_rflags(vcpu)); | |
6217 | put_smstate(u32, buf, 0x7ff0, kvm_rip_read(vcpu)); | |
6218 | ||
6219 | for (i = 0; i < 8; i++) | |
6220 | put_smstate(u32, buf, 0x7fd0 + i * 4, kvm_register_read(vcpu, i)); | |
6221 | ||
6222 | kvm_get_dr(vcpu, 6, &val); | |
6223 | put_smstate(u32, buf, 0x7fcc, (u32)val); | |
6224 | kvm_get_dr(vcpu, 7, &val); | |
6225 | put_smstate(u32, buf, 0x7fc8, (u32)val); | |
6226 | ||
6227 | kvm_get_segment(vcpu, &seg, VCPU_SREG_TR); | |
6228 | put_smstate(u32, buf, 0x7fc4, seg.selector); | |
6229 | put_smstate(u32, buf, 0x7f64, seg.base); | |
6230 | put_smstate(u32, buf, 0x7f60, seg.limit); | |
6231 | put_smstate(u32, buf, 0x7f5c, process_smi_get_segment_flags(&seg)); | |
6232 | ||
6233 | kvm_get_segment(vcpu, &seg, VCPU_SREG_LDTR); | |
6234 | put_smstate(u32, buf, 0x7fc0, seg.selector); | |
6235 | put_smstate(u32, buf, 0x7f80, seg.base); | |
6236 | put_smstate(u32, buf, 0x7f7c, seg.limit); | |
6237 | put_smstate(u32, buf, 0x7f78, process_smi_get_segment_flags(&seg)); | |
6238 | ||
6239 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
6240 | put_smstate(u32, buf, 0x7f74, dt.address); | |
6241 | put_smstate(u32, buf, 0x7f70, dt.size); | |
6242 | ||
6243 | kvm_x86_ops->get_idt(vcpu, &dt); | |
6244 | put_smstate(u32, buf, 0x7f58, dt.address); | |
6245 | put_smstate(u32, buf, 0x7f54, dt.size); | |
6246 | ||
6247 | for (i = 0; i < 6; i++) | |
6248 | process_smi_save_seg_32(vcpu, buf, i); | |
6249 | ||
6250 | put_smstate(u32, buf, 0x7f14, kvm_read_cr4(vcpu)); | |
6251 | ||
6252 | /* revision id */ | |
6253 | put_smstate(u32, buf, 0x7efc, 0x00020000); | |
6254 | put_smstate(u32, buf, 0x7ef8, vcpu->arch.smbase); | |
6255 | } | |
6256 | ||
6257 | static void process_smi_save_state_64(struct kvm_vcpu *vcpu, char *buf) | |
6258 | { | |
6259 | #ifdef CONFIG_X86_64 | |
6260 | struct desc_ptr dt; | |
6261 | struct kvm_segment seg; | |
6262 | unsigned long val; | |
6263 | int i; | |
6264 | ||
6265 | for (i = 0; i < 16; i++) | |
6266 | put_smstate(u64, buf, 0x7ff8 - i * 8, kvm_register_read(vcpu, i)); | |
6267 | ||
6268 | put_smstate(u64, buf, 0x7f78, kvm_rip_read(vcpu)); | |
6269 | put_smstate(u32, buf, 0x7f70, kvm_get_rflags(vcpu)); | |
6270 | ||
6271 | kvm_get_dr(vcpu, 6, &val); | |
6272 | put_smstate(u64, buf, 0x7f68, val); | |
6273 | kvm_get_dr(vcpu, 7, &val); | |
6274 | put_smstate(u64, buf, 0x7f60, val); | |
6275 | ||
6276 | put_smstate(u64, buf, 0x7f58, kvm_read_cr0(vcpu)); | |
6277 | put_smstate(u64, buf, 0x7f50, kvm_read_cr3(vcpu)); | |
6278 | put_smstate(u64, buf, 0x7f48, kvm_read_cr4(vcpu)); | |
6279 | ||
6280 | put_smstate(u32, buf, 0x7f00, vcpu->arch.smbase); | |
6281 | ||
6282 | /* revision id */ | |
6283 | put_smstate(u32, buf, 0x7efc, 0x00020064); | |
6284 | ||
6285 | put_smstate(u64, buf, 0x7ed0, vcpu->arch.efer); | |
6286 | ||
6287 | kvm_get_segment(vcpu, &seg, VCPU_SREG_TR); | |
6288 | put_smstate(u16, buf, 0x7e90, seg.selector); | |
6289 | put_smstate(u16, buf, 0x7e92, process_smi_get_segment_flags(&seg) >> 8); | |
6290 | put_smstate(u32, buf, 0x7e94, seg.limit); | |
6291 | put_smstate(u64, buf, 0x7e98, seg.base); | |
6292 | ||
6293 | kvm_x86_ops->get_idt(vcpu, &dt); | |
6294 | put_smstate(u32, buf, 0x7e84, dt.size); | |
6295 | put_smstate(u64, buf, 0x7e88, dt.address); | |
6296 | ||
6297 | kvm_get_segment(vcpu, &seg, VCPU_SREG_LDTR); | |
6298 | put_smstate(u16, buf, 0x7e70, seg.selector); | |
6299 | put_smstate(u16, buf, 0x7e72, process_smi_get_segment_flags(&seg) >> 8); | |
6300 | put_smstate(u32, buf, 0x7e74, seg.limit); | |
6301 | put_smstate(u64, buf, 0x7e78, seg.base); | |
6302 | ||
6303 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
6304 | put_smstate(u32, buf, 0x7e64, dt.size); | |
6305 | put_smstate(u64, buf, 0x7e68, dt.address); | |
6306 | ||
6307 | for (i = 0; i < 6; i++) | |
6308 | process_smi_save_seg_64(vcpu, buf, i); | |
6309 | #else | |
6310 | WARN_ON_ONCE(1); | |
6311 | #endif | |
6312 | } | |
6313 | ||
64d60670 PB |
6314 | static void process_smi(struct kvm_vcpu *vcpu) |
6315 | { | |
660a5d51 | 6316 | struct kvm_segment cs, ds; |
18c3626e | 6317 | struct desc_ptr dt; |
660a5d51 PB |
6318 | char buf[512]; |
6319 | u32 cr0; | |
6320 | ||
64d60670 PB |
6321 | if (is_smm(vcpu)) { |
6322 | vcpu->arch.smi_pending = true; | |
6323 | return; | |
6324 | } | |
6325 | ||
660a5d51 PB |
6326 | trace_kvm_enter_smm(vcpu->vcpu_id, vcpu->arch.smbase, true); |
6327 | vcpu->arch.hflags |= HF_SMM_MASK; | |
6328 | memset(buf, 0, 512); | |
6329 | if (guest_cpuid_has_longmode(vcpu)) | |
6330 | process_smi_save_state_64(vcpu, buf); | |
6331 | else | |
6332 | process_smi_save_state_32(vcpu, buf); | |
6333 | ||
54bf36aa | 6334 | kvm_vcpu_write_guest(vcpu, vcpu->arch.smbase + 0xfe00, buf, sizeof(buf)); |
660a5d51 PB |
6335 | |
6336 | if (kvm_x86_ops->get_nmi_mask(vcpu)) | |
6337 | vcpu->arch.hflags |= HF_SMM_INSIDE_NMI_MASK; | |
6338 | else | |
6339 | kvm_x86_ops->set_nmi_mask(vcpu, true); | |
6340 | ||
6341 | kvm_set_rflags(vcpu, X86_EFLAGS_FIXED); | |
6342 | kvm_rip_write(vcpu, 0x8000); | |
6343 | ||
6344 | cr0 = vcpu->arch.cr0 & ~(X86_CR0_PE | X86_CR0_EM | X86_CR0_TS | X86_CR0_PG); | |
6345 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
6346 | vcpu->arch.cr0 = cr0; | |
6347 | ||
6348 | kvm_x86_ops->set_cr4(vcpu, 0); | |
6349 | ||
18c3626e PB |
6350 | /* Undocumented: IDT limit is set to zero on entry to SMM. */ |
6351 | dt.address = dt.size = 0; | |
6352 | kvm_x86_ops->set_idt(vcpu, &dt); | |
6353 | ||
660a5d51 PB |
6354 | __kvm_set_dr(vcpu, 7, DR7_FIXED_1); |
6355 | ||
6356 | cs.selector = (vcpu->arch.smbase >> 4) & 0xffff; | |
6357 | cs.base = vcpu->arch.smbase; | |
6358 | ||
6359 | ds.selector = 0; | |
6360 | ds.base = 0; | |
6361 | ||
6362 | cs.limit = ds.limit = 0xffffffff; | |
6363 | cs.type = ds.type = 0x3; | |
6364 | cs.dpl = ds.dpl = 0; | |
6365 | cs.db = ds.db = 0; | |
6366 | cs.s = ds.s = 1; | |
6367 | cs.l = ds.l = 0; | |
6368 | cs.g = ds.g = 1; | |
6369 | cs.avl = ds.avl = 0; | |
6370 | cs.present = ds.present = 1; | |
6371 | cs.unusable = ds.unusable = 0; | |
6372 | cs.padding = ds.padding = 0; | |
6373 | ||
6374 | kvm_set_segment(vcpu, &cs, VCPU_SREG_CS); | |
6375 | kvm_set_segment(vcpu, &ds, VCPU_SREG_DS); | |
6376 | kvm_set_segment(vcpu, &ds, VCPU_SREG_ES); | |
6377 | kvm_set_segment(vcpu, &ds, VCPU_SREG_FS); | |
6378 | kvm_set_segment(vcpu, &ds, VCPU_SREG_GS); | |
6379 | kvm_set_segment(vcpu, &ds, VCPU_SREG_SS); | |
6380 | ||
6381 | if (guest_cpuid_has_longmode(vcpu)) | |
6382 | kvm_x86_ops->set_efer(vcpu, 0); | |
6383 | ||
6384 | kvm_update_cpuid(vcpu); | |
6385 | kvm_mmu_reset_context(vcpu); | |
64d60670 PB |
6386 | } |
6387 | ||
2860c4b1 PB |
6388 | void kvm_make_scan_ioapic_request(struct kvm *kvm) |
6389 | { | |
6390 | kvm_make_all_cpus_request(kvm, KVM_REQ_SCAN_IOAPIC); | |
6391 | } | |
6392 | ||
3d81bc7e | 6393 | static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu) |
c7c9c56c | 6394 | { |
5c919412 AS |
6395 | u64 eoi_exit_bitmap[4]; |
6396 | ||
3d81bc7e YZ |
6397 | if (!kvm_apic_hw_enabled(vcpu->arch.apic)) |
6398 | return; | |
c7c9c56c | 6399 | |
6308630b | 6400 | bitmap_zero(vcpu->arch.ioapic_handled_vectors, 256); |
c7c9c56c | 6401 | |
b053b2ae | 6402 | if (irqchip_split(vcpu->kvm)) |
6308630b | 6403 | kvm_scan_ioapic_routes(vcpu, vcpu->arch.ioapic_handled_vectors); |
db2bdcbb | 6404 | else { |
d62caabb AS |
6405 | if (vcpu->arch.apicv_active) |
6406 | kvm_x86_ops->sync_pir_to_irr(vcpu); | |
6308630b | 6407 | kvm_ioapic_scan_entry(vcpu, vcpu->arch.ioapic_handled_vectors); |
db2bdcbb | 6408 | } |
5c919412 AS |
6409 | bitmap_or((ulong *)eoi_exit_bitmap, vcpu->arch.ioapic_handled_vectors, |
6410 | vcpu_to_synic(vcpu)->vec_bitmap, 256); | |
6411 | kvm_x86_ops->load_eoi_exitmap(vcpu, eoi_exit_bitmap); | |
c7c9c56c YZ |
6412 | } |
6413 | ||
a70656b6 RK |
6414 | static void kvm_vcpu_flush_tlb(struct kvm_vcpu *vcpu) |
6415 | { | |
6416 | ++vcpu->stat.tlb_flush; | |
6417 | kvm_x86_ops->tlb_flush(vcpu); | |
6418 | } | |
6419 | ||
4256f43f TC |
6420 | void kvm_vcpu_reload_apic_access_page(struct kvm_vcpu *vcpu) |
6421 | { | |
c24ae0dc TC |
6422 | struct page *page = NULL; |
6423 | ||
35754c98 | 6424 | if (!lapic_in_kernel(vcpu)) |
f439ed27 PB |
6425 | return; |
6426 | ||
4256f43f TC |
6427 | if (!kvm_x86_ops->set_apic_access_page_addr) |
6428 | return; | |
6429 | ||
c24ae0dc | 6430 | page = gfn_to_page(vcpu->kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT); |
e8fd5e9e AA |
6431 | if (is_error_page(page)) |
6432 | return; | |
c24ae0dc TC |
6433 | kvm_x86_ops->set_apic_access_page_addr(vcpu, page_to_phys(page)); |
6434 | ||
6435 | /* | |
6436 | * Do not pin apic access page in memory, the MMU notifier | |
6437 | * will call us again if it is migrated or swapped out. | |
6438 | */ | |
6439 | put_page(page); | |
4256f43f TC |
6440 | } |
6441 | EXPORT_SYMBOL_GPL(kvm_vcpu_reload_apic_access_page); | |
6442 | ||
fe71557a TC |
6443 | void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm, |
6444 | unsigned long address) | |
6445 | { | |
c24ae0dc TC |
6446 | /* |
6447 | * The physical address of apic access page is stored in the VMCS. | |
6448 | * Update it when it becomes invalid. | |
6449 | */ | |
6450 | if (address == gfn_to_hva(kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT)) | |
6451 | kvm_make_all_cpus_request(kvm, KVM_REQ_APIC_PAGE_RELOAD); | |
fe71557a TC |
6452 | } |
6453 | ||
9357d939 | 6454 | /* |
362c698f | 6455 | * Returns 1 to let vcpu_run() continue the guest execution loop without |
9357d939 TY |
6456 | * exiting to the userspace. Otherwise, the value will be returned to the |
6457 | * userspace. | |
6458 | */ | |
851ba692 | 6459 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
6460 | { |
6461 | int r; | |
62a193ed MG |
6462 | bool req_int_win = |
6463 | dm_request_for_irq_injection(vcpu) && | |
6464 | kvm_cpu_accept_dm_intr(vcpu); | |
6465 | ||
730dca42 | 6466 | bool req_immediate_exit = false; |
b6c7a5dc | 6467 | |
3e007509 | 6468 | if (vcpu->requests) { |
a8eeb04a | 6469 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) |
2e53d63a | 6470 | kvm_mmu_unload(vcpu); |
a8eeb04a | 6471 | if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu)) |
2f599714 | 6472 | __kvm_migrate_timers(vcpu); |
d828199e MT |
6473 | if (kvm_check_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu)) |
6474 | kvm_gen_update_masterclock(vcpu->kvm); | |
0061d53d MT |
6475 | if (kvm_check_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu)) |
6476 | kvm_gen_kvmclock_update(vcpu); | |
34c238a1 ZA |
6477 | if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) { |
6478 | r = kvm_guest_time_update(vcpu); | |
8cfdc000 ZA |
6479 | if (unlikely(r)) |
6480 | goto out; | |
6481 | } | |
a8eeb04a | 6482 | if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu)) |
4731d4c7 | 6483 | kvm_mmu_sync_roots(vcpu); |
a8eeb04a | 6484 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) |
a70656b6 | 6485 | kvm_vcpu_flush_tlb(vcpu); |
a8eeb04a | 6486 | if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) { |
851ba692 | 6487 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
6488 | r = 0; |
6489 | goto out; | |
6490 | } | |
a8eeb04a | 6491 | if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) { |
851ba692 | 6492 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
71c4dfaf JR |
6493 | r = 0; |
6494 | goto out; | |
6495 | } | |
a8eeb04a | 6496 | if (kvm_check_request(KVM_REQ_DEACTIVATE_FPU, vcpu)) { |
02daab21 AK |
6497 | vcpu->fpu_active = 0; |
6498 | kvm_x86_ops->fpu_deactivate(vcpu); | |
6499 | } | |
af585b92 GN |
6500 | if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) { |
6501 | /* Page is swapped out. Do synthetic halt */ | |
6502 | vcpu->arch.apf.halted = true; | |
6503 | r = 1; | |
6504 | goto out; | |
6505 | } | |
c9aaa895 GC |
6506 | if (kvm_check_request(KVM_REQ_STEAL_UPDATE, vcpu)) |
6507 | record_steal_time(vcpu); | |
64d60670 PB |
6508 | if (kvm_check_request(KVM_REQ_SMI, vcpu)) |
6509 | process_smi(vcpu); | |
7460fb4a AK |
6510 | if (kvm_check_request(KVM_REQ_NMI, vcpu)) |
6511 | process_nmi(vcpu); | |
f5132b01 | 6512 | if (kvm_check_request(KVM_REQ_PMU, vcpu)) |
c6702c9d | 6513 | kvm_pmu_handle_event(vcpu); |
f5132b01 | 6514 | if (kvm_check_request(KVM_REQ_PMI, vcpu)) |
c6702c9d | 6515 | kvm_pmu_deliver_pmi(vcpu); |
7543a635 SR |
6516 | if (kvm_check_request(KVM_REQ_IOAPIC_EOI_EXIT, vcpu)) { |
6517 | BUG_ON(vcpu->arch.pending_ioapic_eoi > 255); | |
6518 | if (test_bit(vcpu->arch.pending_ioapic_eoi, | |
6308630b | 6519 | vcpu->arch.ioapic_handled_vectors)) { |
7543a635 SR |
6520 | vcpu->run->exit_reason = KVM_EXIT_IOAPIC_EOI; |
6521 | vcpu->run->eoi.vector = | |
6522 | vcpu->arch.pending_ioapic_eoi; | |
6523 | r = 0; | |
6524 | goto out; | |
6525 | } | |
6526 | } | |
3d81bc7e YZ |
6527 | if (kvm_check_request(KVM_REQ_SCAN_IOAPIC, vcpu)) |
6528 | vcpu_scan_ioapic(vcpu); | |
4256f43f TC |
6529 | if (kvm_check_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu)) |
6530 | kvm_vcpu_reload_apic_access_page(vcpu); | |
2ce79189 AS |
6531 | if (kvm_check_request(KVM_REQ_HV_CRASH, vcpu)) { |
6532 | vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; | |
6533 | vcpu->run->system_event.type = KVM_SYSTEM_EVENT_CRASH; | |
6534 | r = 0; | |
6535 | goto out; | |
6536 | } | |
e516cebb AS |
6537 | if (kvm_check_request(KVM_REQ_HV_RESET, vcpu)) { |
6538 | vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; | |
6539 | vcpu->run->system_event.type = KVM_SYSTEM_EVENT_RESET; | |
6540 | r = 0; | |
6541 | goto out; | |
6542 | } | |
db397571 AS |
6543 | if (kvm_check_request(KVM_REQ_HV_EXIT, vcpu)) { |
6544 | vcpu->run->exit_reason = KVM_EXIT_HYPERV; | |
6545 | vcpu->run->hyperv = vcpu->arch.hyperv.exit; | |
6546 | r = 0; | |
6547 | goto out; | |
6548 | } | |
f3b138c5 AS |
6549 | |
6550 | /* | |
6551 | * KVM_REQ_HV_STIMER has to be processed after | |
6552 | * KVM_REQ_CLOCK_UPDATE, because Hyper-V SynIC timers | |
6553 | * depend on the guest clock being up-to-date | |
6554 | */ | |
1f4b34f8 AS |
6555 | if (kvm_check_request(KVM_REQ_HV_STIMER, vcpu)) |
6556 | kvm_hv_process_stimers(vcpu); | |
2f52d58c | 6557 | } |
b93463aa | 6558 | |
bf9f6ac8 FW |
6559 | /* |
6560 | * KVM_REQ_EVENT is not set when posted interrupts are set by | |
6561 | * VT-d hardware, so we have to update RVI unconditionally. | |
6562 | */ | |
6563 | if (kvm_lapic_enabled(vcpu)) { | |
6564 | /* | |
6565 | * Update architecture specific hints for APIC | |
6566 | * virtual interrupt delivery. | |
6567 | */ | |
d62caabb | 6568 | if (vcpu->arch.apicv_active) |
bf9f6ac8 FW |
6569 | kvm_x86_ops->hwapic_irr_update(vcpu, |
6570 | kvm_lapic_find_highest_irr(vcpu)); | |
2f52d58c | 6571 | } |
b93463aa | 6572 | |
b463a6f7 | 6573 | if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { |
66450a21 JK |
6574 | kvm_apic_accept_events(vcpu); |
6575 | if (vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { | |
6576 | r = 1; | |
6577 | goto out; | |
6578 | } | |
6579 | ||
b6b8a145 JK |
6580 | if (inject_pending_event(vcpu, req_int_win) != 0) |
6581 | req_immediate_exit = true; | |
b463a6f7 | 6582 | /* enable NMI/IRQ window open exits if needed */ |
321c5658 YS |
6583 | else { |
6584 | if (vcpu->arch.nmi_pending) | |
6585 | kvm_x86_ops->enable_nmi_window(vcpu); | |
6586 | if (kvm_cpu_has_injectable_intr(vcpu) || req_int_win) | |
6587 | kvm_x86_ops->enable_irq_window(vcpu); | |
6588 | } | |
b463a6f7 AK |
6589 | |
6590 | if (kvm_lapic_enabled(vcpu)) { | |
6591 | update_cr8_intercept(vcpu); | |
6592 | kvm_lapic_sync_to_vapic(vcpu); | |
6593 | } | |
6594 | } | |
6595 | ||
d8368af8 AK |
6596 | r = kvm_mmu_reload(vcpu); |
6597 | if (unlikely(r)) { | |
d905c069 | 6598 | goto cancel_injection; |
d8368af8 AK |
6599 | } |
6600 | ||
b6c7a5dc HB |
6601 | preempt_disable(); |
6602 | ||
6603 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2608d7a1 AK |
6604 | if (vcpu->fpu_active) |
6605 | kvm_load_guest_fpu(vcpu); | |
6b7e2d09 XG |
6606 | vcpu->mode = IN_GUEST_MODE; |
6607 | ||
01b71917 MT |
6608 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
6609 | ||
0f127d12 LT |
6610 | /* |
6611 | * We should set ->mode before check ->requests, | |
6612 | * Please see the comment in kvm_make_all_cpus_request. | |
6613 | * This also orders the write to mode from any reads | |
6614 | * to the page tables done while the VCPU is running. | |
6615 | * Please see the comment in kvm_flush_remote_tlbs. | |
6b7e2d09 | 6616 | */ |
01b71917 | 6617 | smp_mb__after_srcu_read_unlock(); |
b6c7a5dc | 6618 | |
d94e1dc9 | 6619 | local_irq_disable(); |
32f88400 | 6620 | |
6b7e2d09 | 6621 | if (vcpu->mode == EXITING_GUEST_MODE || vcpu->requests |
d94e1dc9 | 6622 | || need_resched() || signal_pending(current)) { |
6b7e2d09 | 6623 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 6624 | smp_wmb(); |
6c142801 AK |
6625 | local_irq_enable(); |
6626 | preempt_enable(); | |
01b71917 | 6627 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
6c142801 | 6628 | r = 1; |
d905c069 | 6629 | goto cancel_injection; |
6c142801 AK |
6630 | } |
6631 | ||
fc5b7f3b DM |
6632 | kvm_load_guest_xcr0(vcpu); |
6633 | ||
d6185f20 NHE |
6634 | if (req_immediate_exit) |
6635 | smp_send_reschedule(vcpu->cpu); | |
6636 | ||
8b89fe1f PB |
6637 | trace_kvm_entry(vcpu->vcpu_id); |
6638 | wait_lapic_expire(vcpu); | |
ccf73aaf | 6639 | __kvm_guest_enter(); |
b6c7a5dc | 6640 | |
42dbaa5a | 6641 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
6642 | set_debugreg(0, 7); |
6643 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
6644 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
6645 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
6646 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
c77fb5fe | 6647 | set_debugreg(vcpu->arch.dr6, 6); |
ae561ede | 6648 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD; |
42dbaa5a | 6649 | } |
b6c7a5dc | 6650 | |
851ba692 | 6651 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 6652 | |
c77fb5fe PB |
6653 | /* |
6654 | * Do this here before restoring debug registers on the host. And | |
6655 | * since we do this before handling the vmexit, a DR access vmexit | |
6656 | * can (a) read the correct value of the debug registers, (b) set | |
6657 | * KVM_DEBUGREG_WONT_EXIT again. | |
6658 | */ | |
6659 | if (unlikely(vcpu->arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT)) { | |
c77fb5fe PB |
6660 | WARN_ON(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP); |
6661 | kvm_x86_ops->sync_dirty_debug_regs(vcpu); | |
70e4da7a PB |
6662 | kvm_update_dr0123(vcpu); |
6663 | kvm_update_dr6(vcpu); | |
6664 | kvm_update_dr7(vcpu); | |
6665 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD; | |
c77fb5fe PB |
6666 | } |
6667 | ||
24f1e32c FW |
6668 | /* |
6669 | * If the guest has used debug registers, at least dr7 | |
6670 | * will be disabled while returning to the host. | |
6671 | * If we don't have active breakpoints in the host, we don't | |
6672 | * care about the messed up debug address registers. But if | |
6673 | * we have some of them active, restore the old state. | |
6674 | */ | |
59d8eb53 | 6675 | if (hw_breakpoint_active()) |
24f1e32c | 6676 | hw_breakpoint_restore(); |
42dbaa5a | 6677 | |
4ba76538 | 6678 | vcpu->arch.last_guest_tsc = kvm_read_l1_tsc(vcpu, rdtsc()); |
1d5f066e | 6679 | |
6b7e2d09 | 6680 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 6681 | smp_wmb(); |
a547c6db | 6682 | |
fc5b7f3b DM |
6683 | kvm_put_guest_xcr0(vcpu); |
6684 | ||
a547c6db YZ |
6685 | /* Interrupt is enabled by handle_external_intr() */ |
6686 | kvm_x86_ops->handle_external_intr(vcpu); | |
b6c7a5dc HB |
6687 | |
6688 | ++vcpu->stat.exits; | |
6689 | ||
6690 | /* | |
6691 | * We must have an instruction between local_irq_enable() and | |
6692 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
6693 | * the interrupt shadow. The stat.exits increment will do nicely. | |
6694 | * But we need to prevent reordering, hence this barrier(): | |
6695 | */ | |
6696 | barrier(); | |
6697 | ||
6698 | kvm_guest_exit(); | |
6699 | ||
6700 | preempt_enable(); | |
6701 | ||
f656ce01 | 6702 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 6703 | |
b6c7a5dc HB |
6704 | /* |
6705 | * Profile KVM exit RIPs: | |
6706 | */ | |
6707 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
6708 | unsigned long rip = kvm_rip_read(vcpu); |
6709 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
6710 | } |
6711 | ||
cc578287 ZA |
6712 | if (unlikely(vcpu->arch.tsc_always_catchup)) |
6713 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); | |
298101da | 6714 | |
5cfb1d5a MT |
6715 | if (vcpu->arch.apic_attention) |
6716 | kvm_lapic_sync_from_vapic(vcpu); | |
b93463aa | 6717 | |
851ba692 | 6718 | r = kvm_x86_ops->handle_exit(vcpu); |
d905c069 MT |
6719 | return r; |
6720 | ||
6721 | cancel_injection: | |
6722 | kvm_x86_ops->cancel_injection(vcpu); | |
ae7a2a3f MT |
6723 | if (unlikely(vcpu->arch.apic_attention)) |
6724 | kvm_lapic_sync_from_vapic(vcpu); | |
d7690175 MT |
6725 | out: |
6726 | return r; | |
6727 | } | |
b6c7a5dc | 6728 | |
362c698f PB |
6729 | static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu) |
6730 | { | |
bf9f6ac8 FW |
6731 | if (!kvm_arch_vcpu_runnable(vcpu) && |
6732 | (!kvm_x86_ops->pre_block || kvm_x86_ops->pre_block(vcpu) == 0)) { | |
9c8fd1ba PB |
6733 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
6734 | kvm_vcpu_block(vcpu); | |
6735 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); | |
bf9f6ac8 FW |
6736 | |
6737 | if (kvm_x86_ops->post_block) | |
6738 | kvm_x86_ops->post_block(vcpu); | |
6739 | ||
9c8fd1ba PB |
6740 | if (!kvm_check_request(KVM_REQ_UNHALT, vcpu)) |
6741 | return 1; | |
6742 | } | |
362c698f PB |
6743 | |
6744 | kvm_apic_accept_events(vcpu); | |
6745 | switch(vcpu->arch.mp_state) { | |
6746 | case KVM_MP_STATE_HALTED: | |
6747 | vcpu->arch.pv.pv_unhalted = false; | |
6748 | vcpu->arch.mp_state = | |
6749 | KVM_MP_STATE_RUNNABLE; | |
6750 | case KVM_MP_STATE_RUNNABLE: | |
6751 | vcpu->arch.apf.halted = false; | |
6752 | break; | |
6753 | case KVM_MP_STATE_INIT_RECEIVED: | |
6754 | break; | |
6755 | default: | |
6756 | return -EINTR; | |
6757 | break; | |
6758 | } | |
6759 | return 1; | |
6760 | } | |
09cec754 | 6761 | |
5d9bc648 PB |
6762 | static inline bool kvm_vcpu_running(struct kvm_vcpu *vcpu) |
6763 | { | |
6764 | return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && | |
6765 | !vcpu->arch.apf.halted); | |
6766 | } | |
6767 | ||
362c698f | 6768 | static int vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
6769 | { |
6770 | int r; | |
f656ce01 | 6771 | struct kvm *kvm = vcpu->kvm; |
d7690175 | 6772 | |
f656ce01 | 6773 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 6774 | |
362c698f | 6775 | for (;;) { |
58f800d5 | 6776 | if (kvm_vcpu_running(vcpu)) { |
851ba692 | 6777 | r = vcpu_enter_guest(vcpu); |
bf9f6ac8 | 6778 | } else { |
362c698f | 6779 | r = vcpu_block(kvm, vcpu); |
bf9f6ac8 FW |
6780 | } |
6781 | ||
09cec754 GN |
6782 | if (r <= 0) |
6783 | break; | |
6784 | ||
6785 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
6786 | if (kvm_cpu_has_pending_timer(vcpu)) | |
6787 | kvm_inject_pending_timer_irqs(vcpu); | |
6788 | ||
782d422b MG |
6789 | if (dm_request_for_irq_injection(vcpu) && |
6790 | kvm_vcpu_ready_for_interrupt_injection(vcpu)) { | |
4ca7dd8c PB |
6791 | r = 0; |
6792 | vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; | |
09cec754 | 6793 | ++vcpu->stat.request_irq_exits; |
362c698f | 6794 | break; |
09cec754 | 6795 | } |
af585b92 GN |
6796 | |
6797 | kvm_check_async_pf_completion(vcpu); | |
6798 | ||
09cec754 GN |
6799 | if (signal_pending(current)) { |
6800 | r = -EINTR; | |
851ba692 | 6801 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 | 6802 | ++vcpu->stat.signal_exits; |
362c698f | 6803 | break; |
09cec754 GN |
6804 | } |
6805 | if (need_resched()) { | |
f656ce01 | 6806 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
c08ac06a | 6807 | cond_resched(); |
f656ce01 | 6808 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 6809 | } |
b6c7a5dc HB |
6810 | } |
6811 | ||
f656ce01 | 6812 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc HB |
6813 | |
6814 | return r; | |
6815 | } | |
6816 | ||
716d51ab GN |
6817 | static inline int complete_emulated_io(struct kvm_vcpu *vcpu) |
6818 | { | |
6819 | int r; | |
6820 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
6821 | r = emulate_instruction(vcpu, EMULTYPE_NO_DECODE); | |
6822 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); | |
6823 | if (r != EMULATE_DONE) | |
6824 | return 0; | |
6825 | return 1; | |
6826 | } | |
6827 | ||
6828 | static int complete_emulated_pio(struct kvm_vcpu *vcpu) | |
6829 | { | |
6830 | BUG_ON(!vcpu->arch.pio.count); | |
6831 | ||
6832 | return complete_emulated_io(vcpu); | |
6833 | } | |
6834 | ||
f78146b0 AK |
6835 | /* |
6836 | * Implements the following, as a state machine: | |
6837 | * | |
6838 | * read: | |
6839 | * for each fragment | |
87da7e66 XG |
6840 | * for each mmio piece in the fragment |
6841 | * write gpa, len | |
6842 | * exit | |
6843 | * copy data | |
f78146b0 AK |
6844 | * execute insn |
6845 | * | |
6846 | * write: | |
6847 | * for each fragment | |
87da7e66 XG |
6848 | * for each mmio piece in the fragment |
6849 | * write gpa, len | |
6850 | * copy data | |
6851 | * exit | |
f78146b0 | 6852 | */ |
716d51ab | 6853 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu) |
5287f194 AK |
6854 | { |
6855 | struct kvm_run *run = vcpu->run; | |
f78146b0 | 6856 | struct kvm_mmio_fragment *frag; |
87da7e66 | 6857 | unsigned len; |
5287f194 | 6858 | |
716d51ab | 6859 | BUG_ON(!vcpu->mmio_needed); |
5287f194 | 6860 | |
716d51ab | 6861 | /* Complete previous fragment */ |
87da7e66 XG |
6862 | frag = &vcpu->mmio_fragments[vcpu->mmio_cur_fragment]; |
6863 | len = min(8u, frag->len); | |
716d51ab | 6864 | if (!vcpu->mmio_is_write) |
87da7e66 XG |
6865 | memcpy(frag->data, run->mmio.data, len); |
6866 | ||
6867 | if (frag->len <= 8) { | |
6868 | /* Switch to the next fragment. */ | |
6869 | frag++; | |
6870 | vcpu->mmio_cur_fragment++; | |
6871 | } else { | |
6872 | /* Go forward to the next mmio piece. */ | |
6873 | frag->data += len; | |
6874 | frag->gpa += len; | |
6875 | frag->len -= len; | |
6876 | } | |
6877 | ||
a08d3b3b | 6878 | if (vcpu->mmio_cur_fragment >= vcpu->mmio_nr_fragments) { |
716d51ab | 6879 | vcpu->mmio_needed = 0; |
0912c977 PB |
6880 | |
6881 | /* FIXME: return into emulator if single-stepping. */ | |
cef4dea0 | 6882 | if (vcpu->mmio_is_write) |
716d51ab GN |
6883 | return 1; |
6884 | vcpu->mmio_read_completed = 1; | |
6885 | return complete_emulated_io(vcpu); | |
6886 | } | |
87da7e66 | 6887 | |
716d51ab GN |
6888 | run->exit_reason = KVM_EXIT_MMIO; |
6889 | run->mmio.phys_addr = frag->gpa; | |
6890 | if (vcpu->mmio_is_write) | |
87da7e66 XG |
6891 | memcpy(run->mmio.data, frag->data, min(8u, frag->len)); |
6892 | run->mmio.len = min(8u, frag->len); | |
716d51ab GN |
6893 | run->mmio.is_write = vcpu->mmio_is_write; |
6894 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; | |
6895 | return 0; | |
5287f194 AK |
6896 | } |
6897 | ||
716d51ab | 6898 | |
b6c7a5dc HB |
6899 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
6900 | { | |
c5bedc68 | 6901 | struct fpu *fpu = ¤t->thread.fpu; |
b6c7a5dc HB |
6902 | int r; |
6903 | sigset_t sigsaved; | |
6904 | ||
c4d72e2d | 6905 | fpu__activate_curr(fpu); |
e5c30142 | 6906 | |
ac9f6dc0 AK |
6907 | if (vcpu->sigset_active) |
6908 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
6909 | ||
a4535290 | 6910 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 6911 | kvm_vcpu_block(vcpu); |
66450a21 | 6912 | kvm_apic_accept_events(vcpu); |
d7690175 | 6913 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
6914 | r = -EAGAIN; |
6915 | goto out; | |
b6c7a5dc HB |
6916 | } |
6917 | ||
b6c7a5dc | 6918 | /* re-sync apic's tpr */ |
35754c98 | 6919 | if (!lapic_in_kernel(vcpu)) { |
eea1cff9 AP |
6920 | if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) { |
6921 | r = -EINVAL; | |
6922 | goto out; | |
6923 | } | |
6924 | } | |
b6c7a5dc | 6925 | |
716d51ab GN |
6926 | if (unlikely(vcpu->arch.complete_userspace_io)) { |
6927 | int (*cui)(struct kvm_vcpu *) = vcpu->arch.complete_userspace_io; | |
6928 | vcpu->arch.complete_userspace_io = NULL; | |
6929 | r = cui(vcpu); | |
6930 | if (r <= 0) | |
6931 | goto out; | |
6932 | } else | |
6933 | WARN_ON(vcpu->arch.pio.count || vcpu->mmio_needed); | |
5287f194 | 6934 | |
362c698f | 6935 | r = vcpu_run(vcpu); |
b6c7a5dc HB |
6936 | |
6937 | out: | |
f1d86e46 | 6938 | post_kvm_run_save(vcpu); |
b6c7a5dc HB |
6939 | if (vcpu->sigset_active) |
6940 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
6941 | ||
b6c7a5dc HB |
6942 | return r; |
6943 | } | |
6944 | ||
6945 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
6946 | { | |
7ae441ea GN |
6947 | if (vcpu->arch.emulate_regs_need_sync_to_vcpu) { |
6948 | /* | |
6949 | * We are here if userspace calls get_regs() in the middle of | |
6950 | * instruction emulation. Registers state needs to be copied | |
4a969980 | 6951 | * back from emulation context to vcpu. Userspace shouldn't do |
7ae441ea GN |
6952 | * that usually, but some bad designed PV devices (vmware |
6953 | * backdoor interface) need this to work | |
6954 | */ | |
dd856efa | 6955 | emulator_writeback_register_cache(&vcpu->arch.emulate_ctxt); |
7ae441ea GN |
6956 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
6957 | } | |
5fdbf976 MT |
6958 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
6959 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
6960 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
6961 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
6962 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
6963 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
6964 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
6965 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 6966 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
6967 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
6968 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
6969 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
6970 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
6971 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
6972 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
6973 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
6974 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
6975 | #endif |
6976 | ||
5fdbf976 | 6977 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 6978 | regs->rflags = kvm_get_rflags(vcpu); |
b6c7a5dc | 6979 | |
b6c7a5dc HB |
6980 | return 0; |
6981 | } | |
6982 | ||
6983 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
6984 | { | |
7ae441ea GN |
6985 | vcpu->arch.emulate_regs_need_sync_from_vcpu = true; |
6986 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; | |
6987 | ||
5fdbf976 MT |
6988 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
6989 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
6990 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
6991 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
6992 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
6993 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
6994 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
6995 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 6996 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
6997 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
6998 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
6999 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
7000 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
7001 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
7002 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
7003 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
7004 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
7005 | #endif |
7006 | ||
5fdbf976 | 7007 | kvm_rip_write(vcpu, regs->rip); |
91586a3b | 7008 | kvm_set_rflags(vcpu, regs->rflags); |
b6c7a5dc | 7009 | |
b4f14abd JK |
7010 | vcpu->arch.exception.pending = false; |
7011 | ||
3842d135 AK |
7012 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
7013 | ||
b6c7a5dc HB |
7014 | return 0; |
7015 | } | |
7016 | ||
b6c7a5dc HB |
7017 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
7018 | { | |
7019 | struct kvm_segment cs; | |
7020 | ||
3e6e0aab | 7021 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
7022 | *db = cs.db; |
7023 | *l = cs.l; | |
7024 | } | |
7025 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
7026 | ||
7027 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
7028 | struct kvm_sregs *sregs) | |
7029 | { | |
89a27f4d | 7030 | struct desc_ptr dt; |
b6c7a5dc | 7031 | |
3e6e0aab GT |
7032 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
7033 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
7034 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
7035 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
7036 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
7037 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 7038 | |
3e6e0aab GT |
7039 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
7040 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
7041 | |
7042 | kvm_x86_ops->get_idt(vcpu, &dt); | |
89a27f4d GN |
7043 | sregs->idt.limit = dt.size; |
7044 | sregs->idt.base = dt.address; | |
b6c7a5dc | 7045 | kvm_x86_ops->get_gdt(vcpu, &dt); |
89a27f4d GN |
7046 | sregs->gdt.limit = dt.size; |
7047 | sregs->gdt.base = dt.address; | |
b6c7a5dc | 7048 | |
4d4ec087 | 7049 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c | 7050 | sregs->cr2 = vcpu->arch.cr2; |
9f8fe504 | 7051 | sregs->cr3 = kvm_read_cr3(vcpu); |
fc78f519 | 7052 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 7053 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 7054 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
7055 | sregs->apic_base = kvm_get_apic_base(vcpu); |
7056 | ||
923c61bb | 7057 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 7058 | |
36752c9b | 7059 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
7060 | set_bit(vcpu->arch.interrupt.nr, |
7061 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 7062 | |
b6c7a5dc HB |
7063 | return 0; |
7064 | } | |
7065 | ||
62d9f0db MT |
7066 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
7067 | struct kvm_mp_state *mp_state) | |
7068 | { | |
66450a21 | 7069 | kvm_apic_accept_events(vcpu); |
6aef266c SV |
7070 | if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED && |
7071 | vcpu->arch.pv.pv_unhalted) | |
7072 | mp_state->mp_state = KVM_MP_STATE_RUNNABLE; | |
7073 | else | |
7074 | mp_state->mp_state = vcpu->arch.mp_state; | |
7075 | ||
62d9f0db MT |
7076 | return 0; |
7077 | } | |
7078 | ||
7079 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
7080 | struct kvm_mp_state *mp_state) | |
7081 | { | |
bce87cce | 7082 | if (!lapic_in_kernel(vcpu) && |
66450a21 JK |
7083 | mp_state->mp_state != KVM_MP_STATE_RUNNABLE) |
7084 | return -EINVAL; | |
7085 | ||
7086 | if (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED) { | |
7087 | vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; | |
7088 | set_bit(KVM_APIC_SIPI, &vcpu->arch.apic->pending_events); | |
7089 | } else | |
7090 | vcpu->arch.mp_state = mp_state->mp_state; | |
3842d135 | 7091 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
62d9f0db MT |
7092 | return 0; |
7093 | } | |
7094 | ||
7f3d35fd KW |
7095 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, |
7096 | int reason, bool has_error_code, u32 error_code) | |
b6c7a5dc | 7097 | { |
9d74191a | 7098 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d | 7099 | int ret; |
e01c2426 | 7100 | |
8ec4722d | 7101 | init_emulate_ctxt(vcpu); |
c697518a | 7102 | |
7f3d35fd | 7103 | ret = emulator_task_switch(ctxt, tss_selector, idt_index, reason, |
9d74191a | 7104 | has_error_code, error_code); |
c697518a | 7105 | |
c697518a | 7106 | if (ret) |
19d04437 | 7107 | return EMULATE_FAIL; |
37817f29 | 7108 | |
9d74191a TY |
7109 | kvm_rip_write(vcpu, ctxt->eip); |
7110 | kvm_set_rflags(vcpu, ctxt->eflags); | |
3842d135 | 7111 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
19d04437 | 7112 | return EMULATE_DONE; |
37817f29 IE |
7113 | } |
7114 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
7115 | ||
b6c7a5dc HB |
7116 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
7117 | struct kvm_sregs *sregs) | |
7118 | { | |
58cb628d | 7119 | struct msr_data apic_base_msr; |
b6c7a5dc | 7120 | int mmu_reset_needed = 0; |
63f42e02 | 7121 | int pending_vec, max_bits, idx; |
89a27f4d | 7122 | struct desc_ptr dt; |
b6c7a5dc | 7123 | |
6d1068b3 PM |
7124 | if (!guest_cpuid_has_xsave(vcpu) && (sregs->cr4 & X86_CR4_OSXSAVE)) |
7125 | return -EINVAL; | |
7126 | ||
89a27f4d GN |
7127 | dt.size = sregs->idt.limit; |
7128 | dt.address = sregs->idt.base; | |
b6c7a5dc | 7129 | kvm_x86_ops->set_idt(vcpu, &dt); |
89a27f4d GN |
7130 | dt.size = sregs->gdt.limit; |
7131 | dt.address = sregs->gdt.base; | |
b6c7a5dc HB |
7132 | kvm_x86_ops->set_gdt(vcpu, &dt); |
7133 | ||
ad312c7c | 7134 | vcpu->arch.cr2 = sregs->cr2; |
9f8fe504 | 7135 | mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3; |
dc7e795e | 7136 | vcpu->arch.cr3 = sregs->cr3; |
aff48baa | 7137 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
b6c7a5dc | 7138 | |
2d3ad1f4 | 7139 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 7140 | |
f6801dff | 7141 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 7142 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
58cb628d JK |
7143 | apic_base_msr.data = sregs->apic_base; |
7144 | apic_base_msr.host_initiated = true; | |
7145 | kvm_set_apic_base(vcpu, &apic_base_msr); | |
b6c7a5dc | 7146 | |
4d4ec087 | 7147 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 7148 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 7149 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 7150 | |
fc78f519 | 7151 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 7152 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
b9baba86 | 7153 | if (sregs->cr4 & (X86_CR4_OSXSAVE | X86_CR4_PKE)) |
00b27a3e | 7154 | kvm_update_cpuid(vcpu); |
63f42e02 XG |
7155 | |
7156 | idx = srcu_read_lock(&vcpu->kvm->srcu); | |
7c93be44 | 7157 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
9f8fe504 | 7158 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); |
7c93be44 MT |
7159 | mmu_reset_needed = 1; |
7160 | } | |
63f42e02 | 7161 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b6c7a5dc HB |
7162 | |
7163 | if (mmu_reset_needed) | |
7164 | kvm_mmu_reset_context(vcpu); | |
7165 | ||
a50abc3b | 7166 | max_bits = KVM_NR_INTERRUPTS; |
923c61bb GN |
7167 | pending_vec = find_first_bit( |
7168 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
7169 | if (pending_vec < max_bits) { | |
66fd3f7f | 7170 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb | 7171 | pr_debug("Set back pending irq %d\n", pending_vec); |
b6c7a5dc HB |
7172 | } |
7173 | ||
3e6e0aab GT |
7174 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
7175 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
7176 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
7177 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
7178 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
7179 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 7180 | |
3e6e0aab GT |
7181 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
7182 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 7183 | |
5f0269f5 ME |
7184 | update_cr8_intercept(vcpu); |
7185 | ||
9c3e4aab | 7186 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 7187 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 7188 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 7189 | !is_protmode(vcpu)) |
9c3e4aab MT |
7190 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
7191 | ||
3842d135 AK |
7192 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
7193 | ||
b6c7a5dc HB |
7194 | return 0; |
7195 | } | |
7196 | ||
d0bfb940 JK |
7197 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
7198 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 7199 | { |
355be0b9 | 7200 | unsigned long rflags; |
ae675ef0 | 7201 | int i, r; |
b6c7a5dc | 7202 | |
4f926bf2 JK |
7203 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
7204 | r = -EBUSY; | |
7205 | if (vcpu->arch.exception.pending) | |
2122ff5e | 7206 | goto out; |
4f926bf2 JK |
7207 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
7208 | kvm_queue_exception(vcpu, DB_VECTOR); | |
7209 | else | |
7210 | kvm_queue_exception(vcpu, BP_VECTOR); | |
7211 | } | |
7212 | ||
91586a3b JK |
7213 | /* |
7214 | * Read rflags as long as potentially injected trace flags are still | |
7215 | * filtered out. | |
7216 | */ | |
7217 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
7218 | |
7219 | vcpu->guest_debug = dbg->control; | |
7220 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
7221 | vcpu->guest_debug = 0; | |
7222 | ||
7223 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
7224 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
7225 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
c8639010 | 7226 | vcpu->arch.guest_debug_dr7 = dbg->arch.debugreg[7]; |
ae675ef0 JK |
7227 | } else { |
7228 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
7229 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
ae675ef0 | 7230 | } |
c8639010 | 7231 | kvm_update_dr7(vcpu); |
ae675ef0 | 7232 | |
f92653ee JK |
7233 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
7234 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + | |
7235 | get_segment_base(vcpu, VCPU_SREG_CS); | |
94fe45da | 7236 | |
91586a3b JK |
7237 | /* |
7238 | * Trigger an rflags update that will inject or remove the trace | |
7239 | * flags. | |
7240 | */ | |
7241 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 7242 | |
a96036b8 | 7243 | kvm_x86_ops->update_bp_intercept(vcpu); |
b6c7a5dc | 7244 | |
4f926bf2 | 7245 | r = 0; |
d0bfb940 | 7246 | |
2122ff5e | 7247 | out: |
b6c7a5dc HB |
7248 | |
7249 | return r; | |
7250 | } | |
7251 | ||
8b006791 ZX |
7252 | /* |
7253 | * Translate a guest virtual address to a guest physical address. | |
7254 | */ | |
7255 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
7256 | struct kvm_translation *tr) | |
7257 | { | |
7258 | unsigned long vaddr = tr->linear_address; | |
7259 | gpa_t gpa; | |
f656ce01 | 7260 | int idx; |
8b006791 | 7261 | |
f656ce01 | 7262 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 7263 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 7264 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
7265 | tr->physical_address = gpa; |
7266 | tr->valid = gpa != UNMAPPED_GVA; | |
7267 | tr->writeable = 1; | |
7268 | tr->usermode = 0; | |
8b006791 ZX |
7269 | |
7270 | return 0; | |
7271 | } | |
7272 | ||
d0752060 HB |
7273 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
7274 | { | |
c47ada30 | 7275 | struct fxregs_state *fxsave = |
7366ed77 | 7276 | &vcpu->arch.guest_fpu.state.fxsave; |
d0752060 | 7277 | |
d0752060 HB |
7278 | memcpy(fpu->fpr, fxsave->st_space, 128); |
7279 | fpu->fcw = fxsave->cwd; | |
7280 | fpu->fsw = fxsave->swd; | |
7281 | fpu->ftwx = fxsave->twd; | |
7282 | fpu->last_opcode = fxsave->fop; | |
7283 | fpu->last_ip = fxsave->rip; | |
7284 | fpu->last_dp = fxsave->rdp; | |
7285 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
7286 | ||
d0752060 HB |
7287 | return 0; |
7288 | } | |
7289 | ||
7290 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
7291 | { | |
c47ada30 | 7292 | struct fxregs_state *fxsave = |
7366ed77 | 7293 | &vcpu->arch.guest_fpu.state.fxsave; |
d0752060 | 7294 | |
d0752060 HB |
7295 | memcpy(fxsave->st_space, fpu->fpr, 128); |
7296 | fxsave->cwd = fpu->fcw; | |
7297 | fxsave->swd = fpu->fsw; | |
7298 | fxsave->twd = fpu->ftwx; | |
7299 | fxsave->fop = fpu->last_opcode; | |
7300 | fxsave->rip = fpu->last_ip; | |
7301 | fxsave->rdp = fpu->last_dp; | |
7302 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
7303 | ||
d0752060 HB |
7304 | return 0; |
7305 | } | |
7306 | ||
0ee6a517 | 7307 | static void fx_init(struct kvm_vcpu *vcpu) |
d0752060 | 7308 | { |
bf935b0b | 7309 | fpstate_init(&vcpu->arch.guest_fpu.state); |
782511b0 | 7310 | if (boot_cpu_has(X86_FEATURE_XSAVES)) |
7366ed77 | 7311 | vcpu->arch.guest_fpu.state.xsave.header.xcomp_bv = |
df1daba7 | 7312 | host_xcr0 | XSTATE_COMPACTION_ENABLED; |
d0752060 | 7313 | |
2acf923e DC |
7314 | /* |
7315 | * Ensure guest xcr0 is valid for loading | |
7316 | */ | |
d91cab78 | 7317 | vcpu->arch.xcr0 = XFEATURE_MASK_FP; |
2acf923e | 7318 | |
ad312c7c | 7319 | vcpu->arch.cr0 |= X86_CR0_ET; |
d0752060 | 7320 | } |
d0752060 HB |
7321 | |
7322 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) | |
7323 | { | |
2608d7a1 | 7324 | if (vcpu->guest_fpu_loaded) |
d0752060 HB |
7325 | return; |
7326 | ||
2acf923e DC |
7327 | /* |
7328 | * Restore all possible states in the guest, | |
7329 | * and assume host would use all available bits. | |
7330 | * Guest xcr0 would be loaded later. | |
7331 | */ | |
d0752060 | 7332 | vcpu->guest_fpu_loaded = 1; |
b1a74bf8 | 7333 | __kernel_fpu_begin(); |
003e2e8b | 7334 | __copy_kernel_to_fpregs(&vcpu->arch.guest_fpu.state); |
0c04851c | 7335 | trace_kvm_fpu(1); |
d0752060 | 7336 | } |
d0752060 HB |
7337 | |
7338 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
7339 | { | |
653f52c3 RR |
7340 | if (!vcpu->guest_fpu_loaded) { |
7341 | vcpu->fpu_counter = 0; | |
d0752060 | 7342 | return; |
653f52c3 | 7343 | } |
d0752060 HB |
7344 | |
7345 | vcpu->guest_fpu_loaded = 0; | |
4f836347 | 7346 | copy_fpregs_to_fpstate(&vcpu->arch.guest_fpu); |
b1a74bf8 | 7347 | __kernel_fpu_end(); |
f096ed85 | 7348 | ++vcpu->stat.fpu_reload; |
653f52c3 RR |
7349 | /* |
7350 | * If using eager FPU mode, or if the guest is a frequent user | |
7351 | * of the FPU, just leave the FPU active for next time. | |
7352 | * Every 255 times fpu_counter rolls over to 0; a guest that uses | |
7353 | * the FPU in bursts will revert to loading it on demand. | |
7354 | */ | |
5a5fbdc0 | 7355 | if (!use_eager_fpu()) { |
653f52c3 RR |
7356 | if (++vcpu->fpu_counter < 5) |
7357 | kvm_make_request(KVM_REQ_DEACTIVATE_FPU, vcpu); | |
7358 | } | |
0c04851c | 7359 | trace_kvm_fpu(0); |
d0752060 | 7360 | } |
e9b11c17 ZX |
7361 | |
7362 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
7363 | { | |
12f9a48f | 7364 | kvmclock_reset(vcpu); |
7f1ea208 | 7365 | |
f5f48ee1 | 7366 | free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); |
e9b11c17 ZX |
7367 | kvm_x86_ops->vcpu_free(vcpu); |
7368 | } | |
7369 | ||
7370 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
7371 | unsigned int id) | |
7372 | { | |
c447e76b LL |
7373 | struct kvm_vcpu *vcpu; |
7374 | ||
6755bae8 ZA |
7375 | if (check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0) |
7376 | printk_once(KERN_WARNING | |
7377 | "kvm: SMP vm created on host with unstable TSC; " | |
7378 | "guest TSC will not be reliable\n"); | |
c447e76b LL |
7379 | |
7380 | vcpu = kvm_x86_ops->vcpu_create(kvm, id); | |
7381 | ||
c447e76b | 7382 | return vcpu; |
26e5215f | 7383 | } |
e9b11c17 | 7384 | |
26e5215f AK |
7385 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
7386 | { | |
7387 | int r; | |
e9b11c17 | 7388 | |
19efffa2 | 7389 | kvm_vcpu_mtrr_init(vcpu); |
9fc77441 MT |
7390 | r = vcpu_load(vcpu); |
7391 | if (r) | |
7392 | return r; | |
d28bc9dd | 7393 | kvm_vcpu_reset(vcpu, false); |
8a3c1a33 | 7394 | kvm_mmu_setup(vcpu); |
e9b11c17 | 7395 | vcpu_put(vcpu); |
26e5215f | 7396 | return r; |
e9b11c17 ZX |
7397 | } |
7398 | ||
31928aa5 | 7399 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 7400 | { |
8fe8ab46 | 7401 | struct msr_data msr; |
332967a3 | 7402 | struct kvm *kvm = vcpu->kvm; |
42897d86 | 7403 | |
31928aa5 DD |
7404 | if (vcpu_load(vcpu)) |
7405 | return; | |
8fe8ab46 WA |
7406 | msr.data = 0x0; |
7407 | msr.index = MSR_IA32_TSC; | |
7408 | msr.host_initiated = true; | |
7409 | kvm_write_tsc(vcpu, &msr); | |
42897d86 MT |
7410 | vcpu_put(vcpu); |
7411 | ||
630994b3 MT |
7412 | if (!kvmclock_periodic_sync) |
7413 | return; | |
7414 | ||
332967a3 AJ |
7415 | schedule_delayed_work(&kvm->arch.kvmclock_sync_work, |
7416 | KVMCLOCK_SYNC_PERIOD); | |
42897d86 MT |
7417 | } |
7418 | ||
d40ccc62 | 7419 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 | 7420 | { |
9fc77441 | 7421 | int r; |
344d9588 GN |
7422 | vcpu->arch.apf.msr_val = 0; |
7423 | ||
9fc77441 MT |
7424 | r = vcpu_load(vcpu); |
7425 | BUG_ON(r); | |
e9b11c17 ZX |
7426 | kvm_mmu_unload(vcpu); |
7427 | vcpu_put(vcpu); | |
7428 | ||
7429 | kvm_x86_ops->vcpu_free(vcpu); | |
7430 | } | |
7431 | ||
d28bc9dd | 7432 | void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) |
e9b11c17 | 7433 | { |
e69fab5d PB |
7434 | vcpu->arch.hflags = 0; |
7435 | ||
7460fb4a AK |
7436 | atomic_set(&vcpu->arch.nmi_queued, 0); |
7437 | vcpu->arch.nmi_pending = 0; | |
448fa4a9 | 7438 | vcpu->arch.nmi_injected = false; |
5f7552d4 NA |
7439 | kvm_clear_interrupt_queue(vcpu); |
7440 | kvm_clear_exception_queue(vcpu); | |
448fa4a9 | 7441 | |
42dbaa5a | 7442 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); |
ae561ede | 7443 | kvm_update_dr0123(vcpu); |
6f43ed01 | 7444 | vcpu->arch.dr6 = DR6_INIT; |
73aaf249 | 7445 | kvm_update_dr6(vcpu); |
42dbaa5a | 7446 | vcpu->arch.dr7 = DR7_FIXED_1; |
c8639010 | 7447 | kvm_update_dr7(vcpu); |
42dbaa5a | 7448 | |
1119022c NA |
7449 | vcpu->arch.cr2 = 0; |
7450 | ||
3842d135 | 7451 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
344d9588 | 7452 | vcpu->arch.apf.msr_val = 0; |
c9aaa895 | 7453 | vcpu->arch.st.msr_val = 0; |
3842d135 | 7454 | |
12f9a48f GC |
7455 | kvmclock_reset(vcpu); |
7456 | ||
af585b92 GN |
7457 | kvm_clear_async_pf_completion_queue(vcpu); |
7458 | kvm_async_pf_hash_reset(vcpu); | |
7459 | vcpu->arch.apf.halted = false; | |
3842d135 | 7460 | |
64d60670 | 7461 | if (!init_event) { |
d28bc9dd | 7462 | kvm_pmu_reset(vcpu); |
64d60670 PB |
7463 | vcpu->arch.smbase = 0x30000; |
7464 | } | |
f5132b01 | 7465 | |
66f7b72e JS |
7466 | memset(vcpu->arch.regs, 0, sizeof(vcpu->arch.regs)); |
7467 | vcpu->arch.regs_avail = ~0; | |
7468 | vcpu->arch.regs_dirty = ~0; | |
7469 | ||
d28bc9dd | 7470 | kvm_x86_ops->vcpu_reset(vcpu, init_event); |
e9b11c17 ZX |
7471 | } |
7472 | ||
2b4a273b | 7473 | void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector) |
66450a21 JK |
7474 | { |
7475 | struct kvm_segment cs; | |
7476 | ||
7477 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
7478 | cs.selector = vector << 8; | |
7479 | cs.base = vector << 12; | |
7480 | kvm_set_segment(vcpu, &cs, VCPU_SREG_CS); | |
7481 | kvm_rip_write(vcpu, 0); | |
e9b11c17 ZX |
7482 | } |
7483 | ||
13a34e06 | 7484 | int kvm_arch_hardware_enable(void) |
e9b11c17 | 7485 | { |
ca84d1a2 ZA |
7486 | struct kvm *kvm; |
7487 | struct kvm_vcpu *vcpu; | |
7488 | int i; | |
0dd6a6ed ZA |
7489 | int ret; |
7490 | u64 local_tsc; | |
7491 | u64 max_tsc = 0; | |
7492 | bool stable, backwards_tsc = false; | |
18863bdd AK |
7493 | |
7494 | kvm_shared_msr_cpu_online(); | |
13a34e06 | 7495 | ret = kvm_x86_ops->hardware_enable(); |
0dd6a6ed ZA |
7496 | if (ret != 0) |
7497 | return ret; | |
7498 | ||
4ea1636b | 7499 | local_tsc = rdtsc(); |
0dd6a6ed ZA |
7500 | stable = !check_tsc_unstable(); |
7501 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
7502 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
7503 | if (!stable && vcpu->cpu == smp_processor_id()) | |
105b21bb | 7504 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0dd6a6ed ZA |
7505 | if (stable && vcpu->arch.last_host_tsc > local_tsc) { |
7506 | backwards_tsc = true; | |
7507 | if (vcpu->arch.last_host_tsc > max_tsc) | |
7508 | max_tsc = vcpu->arch.last_host_tsc; | |
7509 | } | |
7510 | } | |
7511 | } | |
7512 | ||
7513 | /* | |
7514 | * Sometimes, even reliable TSCs go backwards. This happens on | |
7515 | * platforms that reset TSC during suspend or hibernate actions, but | |
7516 | * maintain synchronization. We must compensate. Fortunately, we can | |
7517 | * detect that condition here, which happens early in CPU bringup, | |
7518 | * before any KVM threads can be running. Unfortunately, we can't | |
7519 | * bring the TSCs fully up to date with real time, as we aren't yet far | |
7520 | * enough into CPU bringup that we know how much real time has actually | |
7521 | * elapsed; our helper function, get_kernel_ns() will be using boot | |
7522 | * variables that haven't been updated yet. | |
7523 | * | |
7524 | * So we simply find the maximum observed TSC above, then record the | |
7525 | * adjustment to TSC in each VCPU. When the VCPU later gets loaded, | |
7526 | * the adjustment will be applied. Note that we accumulate | |
7527 | * adjustments, in case multiple suspend cycles happen before some VCPU | |
7528 | * gets a chance to run again. In the event that no KVM threads get a | |
7529 | * chance to run, we will miss the entire elapsed period, as we'll have | |
7530 | * reset last_host_tsc, so VCPUs will not have the TSC adjusted and may | |
7531 | * loose cycle time. This isn't too big a deal, since the loss will be | |
7532 | * uniform across all VCPUs (not to mention the scenario is extremely | |
7533 | * unlikely). It is possible that a second hibernate recovery happens | |
7534 | * much faster than a first, causing the observed TSC here to be | |
7535 | * smaller; this would require additional padding adjustment, which is | |
7536 | * why we set last_host_tsc to the local tsc observed here. | |
7537 | * | |
7538 | * N.B. - this code below runs only on platforms with reliable TSC, | |
7539 | * as that is the only way backwards_tsc is set above. Also note | |
7540 | * that this runs for ALL vcpus, which is not a bug; all VCPUs should | |
7541 | * have the same delta_cyc adjustment applied if backwards_tsc | |
7542 | * is detected. Note further, this adjustment is only done once, | |
7543 | * as we reset last_host_tsc on all VCPUs to stop this from being | |
7544 | * called multiple times (one for each physical CPU bringup). | |
7545 | * | |
4a969980 | 7546 | * Platforms with unreliable TSCs don't have to deal with this, they |
0dd6a6ed ZA |
7547 | * will be compensated by the logic in vcpu_load, which sets the TSC to |
7548 | * catchup mode. This will catchup all VCPUs to real time, but cannot | |
7549 | * guarantee that they stay in perfect synchronization. | |
7550 | */ | |
7551 | if (backwards_tsc) { | |
7552 | u64 delta_cyc = max_tsc - local_tsc; | |
16a96021 | 7553 | backwards_tsc_observed = true; |
0dd6a6ed ZA |
7554 | list_for_each_entry(kvm, &vm_list, vm_list) { |
7555 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
7556 | vcpu->arch.tsc_offset_adjustment += delta_cyc; | |
7557 | vcpu->arch.last_host_tsc = local_tsc; | |
105b21bb | 7558 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
0dd6a6ed ZA |
7559 | } |
7560 | ||
7561 | /* | |
7562 | * We have to disable TSC offset matching.. if you were | |
7563 | * booting a VM while issuing an S4 host suspend.... | |
7564 | * you may have some problem. Solving this issue is | |
7565 | * left as an exercise to the reader. | |
7566 | */ | |
7567 | kvm->arch.last_tsc_nsec = 0; | |
7568 | kvm->arch.last_tsc_write = 0; | |
7569 | } | |
7570 | ||
7571 | } | |
7572 | return 0; | |
e9b11c17 ZX |
7573 | } |
7574 | ||
13a34e06 | 7575 | void kvm_arch_hardware_disable(void) |
e9b11c17 | 7576 | { |
13a34e06 RK |
7577 | kvm_x86_ops->hardware_disable(); |
7578 | drop_user_return_notifiers(); | |
e9b11c17 ZX |
7579 | } |
7580 | ||
7581 | int kvm_arch_hardware_setup(void) | |
7582 | { | |
9e9c3fe4 NA |
7583 | int r; |
7584 | ||
7585 | r = kvm_x86_ops->hardware_setup(); | |
7586 | if (r != 0) | |
7587 | return r; | |
7588 | ||
35181e86 HZ |
7589 | if (kvm_has_tsc_control) { |
7590 | /* | |
7591 | * Make sure the user can only configure tsc_khz values that | |
7592 | * fit into a signed integer. | |
7593 | * A min value is not calculated needed because it will always | |
7594 | * be 1 on all machines. | |
7595 | */ | |
7596 | u64 max = min(0x7fffffffULL, | |
7597 | __scale_tsc(kvm_max_tsc_scaling_ratio, tsc_khz)); | |
7598 | kvm_max_guest_tsc_khz = max; | |
7599 | ||
ad721883 | 7600 | kvm_default_tsc_scaling_ratio = 1ULL << kvm_tsc_scaling_ratio_frac_bits; |
35181e86 | 7601 | } |
ad721883 | 7602 | |
9e9c3fe4 NA |
7603 | kvm_init_msr_list(); |
7604 | return 0; | |
e9b11c17 ZX |
7605 | } |
7606 | ||
7607 | void kvm_arch_hardware_unsetup(void) | |
7608 | { | |
7609 | kvm_x86_ops->hardware_unsetup(); | |
7610 | } | |
7611 | ||
7612 | void kvm_arch_check_processor_compat(void *rtn) | |
7613 | { | |
7614 | kvm_x86_ops->check_processor_compatibility(rtn); | |
d71ba788 PB |
7615 | } |
7616 | ||
7617 | bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu) | |
7618 | { | |
7619 | return vcpu->kvm->arch.bsp_vcpu_id == vcpu->vcpu_id; | |
7620 | } | |
7621 | EXPORT_SYMBOL_GPL(kvm_vcpu_is_reset_bsp); | |
7622 | ||
7623 | bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) | |
7624 | { | |
7625 | return (vcpu->arch.apic_base & MSR_IA32_APICBASE_BSP) != 0; | |
e9b11c17 ZX |
7626 | } |
7627 | ||
3e515705 AK |
7628 | bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) |
7629 | { | |
35754c98 | 7630 | return irqchip_in_kernel(vcpu->kvm) == lapic_in_kernel(vcpu); |
3e515705 AK |
7631 | } |
7632 | ||
54e9818f | 7633 | struct static_key kvm_no_apic_vcpu __read_mostly; |
bce87cce | 7634 | EXPORT_SYMBOL_GPL(kvm_no_apic_vcpu); |
54e9818f | 7635 | |
e9b11c17 ZX |
7636 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
7637 | { | |
7638 | struct page *page; | |
7639 | struct kvm *kvm; | |
7640 | int r; | |
7641 | ||
7642 | BUG_ON(vcpu->kvm == NULL); | |
7643 | kvm = vcpu->kvm; | |
7644 | ||
d62caabb | 7645 | vcpu->arch.apicv_active = kvm_x86_ops->get_enable_apicv(); |
6aef266c | 7646 | vcpu->arch.pv.pv_unhalted = false; |
9aabc88f | 7647 | vcpu->arch.emulate_ctxt.ops = &emulate_ops; |
58d269d8 | 7648 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_reset_bsp(vcpu)) |
a4535290 | 7649 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 7650 | else |
a4535290 | 7651 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
7652 | |
7653 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
7654 | if (!page) { | |
7655 | r = -ENOMEM; | |
7656 | goto fail; | |
7657 | } | |
ad312c7c | 7658 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 | 7659 | |
cc578287 | 7660 | kvm_set_tsc_khz(vcpu, max_tsc_khz); |
c285545f | 7661 | |
e9b11c17 ZX |
7662 | r = kvm_mmu_create(vcpu); |
7663 | if (r < 0) | |
7664 | goto fail_free_pio_data; | |
7665 | ||
7666 | if (irqchip_in_kernel(kvm)) { | |
7667 | r = kvm_create_lapic(vcpu); | |
7668 | if (r < 0) | |
7669 | goto fail_mmu_destroy; | |
54e9818f GN |
7670 | } else |
7671 | static_key_slow_inc(&kvm_no_apic_vcpu); | |
e9b11c17 | 7672 | |
890ca9ae HY |
7673 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
7674 | GFP_KERNEL); | |
7675 | if (!vcpu->arch.mce_banks) { | |
7676 | r = -ENOMEM; | |
443c39bc | 7677 | goto fail_free_lapic; |
890ca9ae HY |
7678 | } |
7679 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
7680 | ||
f1797359 WY |
7681 | if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL)) { |
7682 | r = -ENOMEM; | |
f5f48ee1 | 7683 | goto fail_free_mce_banks; |
f1797359 | 7684 | } |
f5f48ee1 | 7685 | |
0ee6a517 | 7686 | fx_init(vcpu); |
66f7b72e | 7687 | |
ba904635 | 7688 | vcpu->arch.ia32_tsc_adjust_msr = 0x0; |
0b79459b | 7689 | vcpu->arch.pv_time_enabled = false; |
d7876f1b PB |
7690 | |
7691 | vcpu->arch.guest_supported_xcr0 = 0; | |
4344ee98 | 7692 | vcpu->arch.guest_xstate_size = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET; |
d7876f1b | 7693 | |
5a4f55cd EK |
7694 | vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu); |
7695 | ||
74545705 RK |
7696 | vcpu->arch.pat = MSR_IA32_CR_PAT_DEFAULT; |
7697 | ||
af585b92 | 7698 | kvm_async_pf_hash_reset(vcpu); |
f5132b01 | 7699 | kvm_pmu_init(vcpu); |
af585b92 | 7700 | |
1c1a9ce9 SR |
7701 | vcpu->arch.pending_external_vector = -1; |
7702 | ||
5c919412 AS |
7703 | kvm_hv_vcpu_init(vcpu); |
7704 | ||
e9b11c17 | 7705 | return 0; |
0ee6a517 | 7706 | |
f5f48ee1 SY |
7707 | fail_free_mce_banks: |
7708 | kfree(vcpu->arch.mce_banks); | |
443c39bc WY |
7709 | fail_free_lapic: |
7710 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
7711 | fail_mmu_destroy: |
7712 | kvm_mmu_destroy(vcpu); | |
7713 | fail_free_pio_data: | |
ad312c7c | 7714 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
7715 | fail: |
7716 | return r; | |
7717 | } | |
7718 | ||
7719 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
7720 | { | |
f656ce01 MT |
7721 | int idx; |
7722 | ||
1f4b34f8 | 7723 | kvm_hv_vcpu_uninit(vcpu); |
f5132b01 | 7724 | kvm_pmu_destroy(vcpu); |
36cb93fd | 7725 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 7726 | kvm_free_lapic(vcpu); |
f656ce01 | 7727 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 7728 | kvm_mmu_destroy(vcpu); |
f656ce01 | 7729 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 7730 | free_page((unsigned long)vcpu->arch.pio_data); |
35754c98 | 7731 | if (!lapic_in_kernel(vcpu)) |
54e9818f | 7732 | static_key_slow_dec(&kvm_no_apic_vcpu); |
e9b11c17 | 7733 | } |
d19a9cd2 | 7734 | |
e790d9ef RK |
7735 | void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) |
7736 | { | |
ae97a3b8 | 7737 | kvm_x86_ops->sched_in(vcpu, cpu); |
e790d9ef RK |
7738 | } |
7739 | ||
e08b9637 | 7740 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
d19a9cd2 | 7741 | { |
e08b9637 CO |
7742 | if (type) |
7743 | return -EINVAL; | |
7744 | ||
6ef768fa | 7745 | INIT_HLIST_HEAD(&kvm->arch.mask_notifier_list); |
f05e70ac | 7746 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
365c8868 | 7747 | INIT_LIST_HEAD(&kvm->arch.zapped_obsolete_pages); |
4d5c5d0f | 7748 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
e0f0bbc5 | 7749 | atomic_set(&kvm->arch.noncoherent_dma_count, 0); |
d19a9cd2 | 7750 | |
5550af4d SY |
7751 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
7752 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
7a84428a AW |
7753 | /* Reserve bit 1 of irq_sources_bitmap for irqfd-resampler */ |
7754 | set_bit(KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID, | |
7755 | &kvm->arch.irq_sources_bitmap); | |
5550af4d | 7756 | |
038f8c11 | 7757 | raw_spin_lock_init(&kvm->arch.tsc_write_lock); |
1e08ec4a | 7758 | mutex_init(&kvm->arch.apic_map_lock); |
d828199e MT |
7759 | spin_lock_init(&kvm->arch.pvclock_gtod_sync_lock); |
7760 | ||
7761 | pvclock_update_vm_gtod_copy(kvm); | |
53f658b3 | 7762 | |
7e44e449 | 7763 | INIT_DELAYED_WORK(&kvm->arch.kvmclock_update_work, kvmclock_update_fn); |
332967a3 | 7764 | INIT_DELAYED_WORK(&kvm->arch.kvmclock_sync_work, kvmclock_sync_fn); |
7e44e449 | 7765 | |
0eb05bf2 | 7766 | kvm_page_track_init(kvm); |
13d268ca | 7767 | kvm_mmu_init_vm(kvm); |
0eb05bf2 | 7768 | |
03543133 SS |
7769 | if (kvm_x86_ops->vm_init) |
7770 | return kvm_x86_ops->vm_init(kvm); | |
7771 | ||
d89f5eff | 7772 | return 0; |
d19a9cd2 ZX |
7773 | } |
7774 | ||
7775 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
7776 | { | |
9fc77441 MT |
7777 | int r; |
7778 | r = vcpu_load(vcpu); | |
7779 | BUG_ON(r); | |
d19a9cd2 ZX |
7780 | kvm_mmu_unload(vcpu); |
7781 | vcpu_put(vcpu); | |
7782 | } | |
7783 | ||
7784 | static void kvm_free_vcpus(struct kvm *kvm) | |
7785 | { | |
7786 | unsigned int i; | |
988a2cae | 7787 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
7788 | |
7789 | /* | |
7790 | * Unpin any mmu pages first. | |
7791 | */ | |
af585b92 GN |
7792 | kvm_for_each_vcpu(i, vcpu, kvm) { |
7793 | kvm_clear_async_pf_completion_queue(vcpu); | |
988a2cae | 7794 | kvm_unload_vcpu_mmu(vcpu); |
af585b92 | 7795 | } |
988a2cae GN |
7796 | kvm_for_each_vcpu(i, vcpu, kvm) |
7797 | kvm_arch_vcpu_free(vcpu); | |
7798 | ||
7799 | mutex_lock(&kvm->lock); | |
7800 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
7801 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 7802 | |
988a2cae GN |
7803 | atomic_set(&kvm->online_vcpus, 0); |
7804 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
7805 | } |
7806 | ||
ad8ba2cd SY |
7807 | void kvm_arch_sync_events(struct kvm *kvm) |
7808 | { | |
332967a3 | 7809 | cancel_delayed_work_sync(&kvm->arch.kvmclock_sync_work); |
7e44e449 | 7810 | cancel_delayed_work_sync(&kvm->arch.kvmclock_update_work); |
ba4cef31 | 7811 | kvm_free_all_assigned_devices(kvm); |
aea924f6 | 7812 | kvm_free_pit(kvm); |
ad8ba2cd SY |
7813 | } |
7814 | ||
1d8007bd | 7815 | int __x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size) |
9da0e4d5 PB |
7816 | { |
7817 | int i, r; | |
25188b99 | 7818 | unsigned long hva; |
f0d648bd PB |
7819 | struct kvm_memslots *slots = kvm_memslots(kvm); |
7820 | struct kvm_memory_slot *slot, old; | |
9da0e4d5 PB |
7821 | |
7822 | /* Called with kvm->slots_lock held. */ | |
1d8007bd PB |
7823 | if (WARN_ON(id >= KVM_MEM_SLOTS_NUM)) |
7824 | return -EINVAL; | |
9da0e4d5 | 7825 | |
f0d648bd PB |
7826 | slot = id_to_memslot(slots, id); |
7827 | if (size) { | |
b21629da | 7828 | if (slot->npages) |
f0d648bd PB |
7829 | return -EEXIST; |
7830 | ||
7831 | /* | |
7832 | * MAP_SHARED to prevent internal slot pages from being moved | |
7833 | * by fork()/COW. | |
7834 | */ | |
7835 | hva = vm_mmap(NULL, 0, size, PROT_READ | PROT_WRITE, | |
7836 | MAP_SHARED | MAP_ANONYMOUS, 0); | |
7837 | if (IS_ERR((void *)hva)) | |
7838 | return PTR_ERR((void *)hva); | |
7839 | } else { | |
7840 | if (!slot->npages) | |
7841 | return 0; | |
7842 | ||
7843 | hva = 0; | |
7844 | } | |
7845 | ||
7846 | old = *slot; | |
9da0e4d5 | 7847 | for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) { |
1d8007bd | 7848 | struct kvm_userspace_memory_region m; |
9da0e4d5 | 7849 | |
1d8007bd PB |
7850 | m.slot = id | (i << 16); |
7851 | m.flags = 0; | |
7852 | m.guest_phys_addr = gpa; | |
f0d648bd | 7853 | m.userspace_addr = hva; |
1d8007bd | 7854 | m.memory_size = size; |
9da0e4d5 PB |
7855 | r = __kvm_set_memory_region(kvm, &m); |
7856 | if (r < 0) | |
7857 | return r; | |
7858 | } | |
7859 | ||
f0d648bd PB |
7860 | if (!size) { |
7861 | r = vm_munmap(old.userspace_addr, old.npages * PAGE_SIZE); | |
7862 | WARN_ON(r < 0); | |
7863 | } | |
7864 | ||
9da0e4d5 PB |
7865 | return 0; |
7866 | } | |
7867 | EXPORT_SYMBOL_GPL(__x86_set_memory_region); | |
7868 | ||
1d8007bd | 7869 | int x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size) |
9da0e4d5 PB |
7870 | { |
7871 | int r; | |
7872 | ||
7873 | mutex_lock(&kvm->slots_lock); | |
1d8007bd | 7874 | r = __x86_set_memory_region(kvm, id, gpa, size); |
9da0e4d5 PB |
7875 | mutex_unlock(&kvm->slots_lock); |
7876 | ||
7877 | return r; | |
7878 | } | |
7879 | EXPORT_SYMBOL_GPL(x86_set_memory_region); | |
7880 | ||
d19a9cd2 ZX |
7881 | void kvm_arch_destroy_vm(struct kvm *kvm) |
7882 | { | |
27469d29 AH |
7883 | if (current->mm == kvm->mm) { |
7884 | /* | |
7885 | * Free memory regions allocated on behalf of userspace, | |
7886 | * unless the the memory map has changed due to process exit | |
7887 | * or fd copying. | |
7888 | */ | |
1d8007bd PB |
7889 | x86_set_memory_region(kvm, APIC_ACCESS_PAGE_PRIVATE_MEMSLOT, 0, 0); |
7890 | x86_set_memory_region(kvm, IDENTITY_PAGETABLE_PRIVATE_MEMSLOT, 0, 0); | |
7891 | x86_set_memory_region(kvm, TSS_PRIVATE_MEMSLOT, 0, 0); | |
27469d29 | 7892 | } |
03543133 SS |
7893 | if (kvm_x86_ops->vm_destroy) |
7894 | kvm_x86_ops->vm_destroy(kvm); | |
6eb55818 | 7895 | kvm_iommu_unmap_guest(kvm); |
d7deeeb0 ZX |
7896 | kfree(kvm->arch.vpic); |
7897 | kfree(kvm->arch.vioapic); | |
d19a9cd2 | 7898 | kvm_free_vcpus(kvm); |
1e08ec4a | 7899 | kfree(rcu_dereference_check(kvm->arch.apic_map, 1)); |
13d268ca | 7900 | kvm_mmu_uninit_vm(kvm); |
d19a9cd2 | 7901 | } |
0de10343 | 7902 | |
5587027c | 7903 | void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, |
db3fe4eb TY |
7904 | struct kvm_memory_slot *dont) |
7905 | { | |
7906 | int i; | |
7907 | ||
d89cc617 TY |
7908 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
7909 | if (!dont || free->arch.rmap[i] != dont->arch.rmap[i]) { | |
548ef284 | 7910 | kvfree(free->arch.rmap[i]); |
d89cc617 | 7911 | free->arch.rmap[i] = NULL; |
77d11309 | 7912 | } |
d89cc617 TY |
7913 | if (i == 0) |
7914 | continue; | |
7915 | ||
7916 | if (!dont || free->arch.lpage_info[i - 1] != | |
7917 | dont->arch.lpage_info[i - 1]) { | |
548ef284 | 7918 | kvfree(free->arch.lpage_info[i - 1]); |
d89cc617 | 7919 | free->arch.lpage_info[i - 1] = NULL; |
db3fe4eb TY |
7920 | } |
7921 | } | |
21ebbeda XG |
7922 | |
7923 | kvm_page_track_free_memslot(free, dont); | |
db3fe4eb TY |
7924 | } |
7925 | ||
5587027c AK |
7926 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
7927 | unsigned long npages) | |
db3fe4eb TY |
7928 | { |
7929 | int i; | |
7930 | ||
d89cc617 | 7931 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
92f94f1e | 7932 | struct kvm_lpage_info *linfo; |
db3fe4eb TY |
7933 | unsigned long ugfn; |
7934 | int lpages; | |
d89cc617 | 7935 | int level = i + 1; |
db3fe4eb TY |
7936 | |
7937 | lpages = gfn_to_index(slot->base_gfn + npages - 1, | |
7938 | slot->base_gfn, level) + 1; | |
7939 | ||
d89cc617 TY |
7940 | slot->arch.rmap[i] = |
7941 | kvm_kvzalloc(lpages * sizeof(*slot->arch.rmap[i])); | |
7942 | if (!slot->arch.rmap[i]) | |
77d11309 | 7943 | goto out_free; |
d89cc617 TY |
7944 | if (i == 0) |
7945 | continue; | |
77d11309 | 7946 | |
92f94f1e XG |
7947 | linfo = kvm_kvzalloc(lpages * sizeof(*linfo)); |
7948 | if (!linfo) | |
db3fe4eb TY |
7949 | goto out_free; |
7950 | ||
92f94f1e XG |
7951 | slot->arch.lpage_info[i - 1] = linfo; |
7952 | ||
db3fe4eb | 7953 | if (slot->base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1)) |
92f94f1e | 7954 | linfo[0].disallow_lpage = 1; |
db3fe4eb | 7955 | if ((slot->base_gfn + npages) & (KVM_PAGES_PER_HPAGE(level) - 1)) |
92f94f1e | 7956 | linfo[lpages - 1].disallow_lpage = 1; |
db3fe4eb TY |
7957 | ugfn = slot->userspace_addr >> PAGE_SHIFT; |
7958 | /* | |
7959 | * If the gfn and userspace address are not aligned wrt each | |
7960 | * other, or if explicitly asked to, disable large page | |
7961 | * support for this slot | |
7962 | */ | |
7963 | if ((slot->base_gfn ^ ugfn) & (KVM_PAGES_PER_HPAGE(level) - 1) || | |
7964 | !kvm_largepages_enabled()) { | |
7965 | unsigned long j; | |
7966 | ||
7967 | for (j = 0; j < lpages; ++j) | |
92f94f1e | 7968 | linfo[j].disallow_lpage = 1; |
db3fe4eb TY |
7969 | } |
7970 | } | |
7971 | ||
21ebbeda XG |
7972 | if (kvm_page_track_create_memslot(slot, npages)) |
7973 | goto out_free; | |
7974 | ||
db3fe4eb TY |
7975 | return 0; |
7976 | ||
7977 | out_free: | |
d89cc617 | 7978 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
548ef284 | 7979 | kvfree(slot->arch.rmap[i]); |
d89cc617 TY |
7980 | slot->arch.rmap[i] = NULL; |
7981 | if (i == 0) | |
7982 | continue; | |
7983 | ||
548ef284 | 7984 | kvfree(slot->arch.lpage_info[i - 1]); |
d89cc617 | 7985 | slot->arch.lpage_info[i - 1] = NULL; |
db3fe4eb TY |
7986 | } |
7987 | return -ENOMEM; | |
7988 | } | |
7989 | ||
15f46015 | 7990 | void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) |
e59dbe09 | 7991 | { |
e6dff7d1 TY |
7992 | /* |
7993 | * memslots->generation has been incremented. | |
7994 | * mmio generation may have reached its maximum value. | |
7995 | */ | |
54bf36aa | 7996 | kvm_mmu_invalidate_mmio_sptes(kvm, slots); |
e59dbe09 TY |
7997 | } |
7998 | ||
f7784b8e MT |
7999 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
8000 | struct kvm_memory_slot *memslot, | |
09170a49 | 8001 | const struct kvm_userspace_memory_region *mem, |
7b6195a9 | 8002 | enum kvm_mr_change change) |
0de10343 | 8003 | { |
f7784b8e MT |
8004 | return 0; |
8005 | } | |
8006 | ||
88178fd4 KH |
8007 | static void kvm_mmu_slot_apply_flags(struct kvm *kvm, |
8008 | struct kvm_memory_slot *new) | |
8009 | { | |
8010 | /* Still write protect RO slot */ | |
8011 | if (new->flags & KVM_MEM_READONLY) { | |
8012 | kvm_mmu_slot_remove_write_access(kvm, new); | |
8013 | return; | |
8014 | } | |
8015 | ||
8016 | /* | |
8017 | * Call kvm_x86_ops dirty logging hooks when they are valid. | |
8018 | * | |
8019 | * kvm_x86_ops->slot_disable_log_dirty is called when: | |
8020 | * | |
8021 | * - KVM_MR_CREATE with dirty logging is disabled | |
8022 | * - KVM_MR_FLAGS_ONLY with dirty logging is disabled in new flag | |
8023 | * | |
8024 | * The reason is, in case of PML, we need to set D-bit for any slots | |
8025 | * with dirty logging disabled in order to eliminate unnecessary GPA | |
8026 | * logging in PML buffer (and potential PML buffer full VMEXT). This | |
8027 | * guarantees leaving PML enabled during guest's lifetime won't have | |
8028 | * any additonal overhead from PML when guest is running with dirty | |
8029 | * logging disabled for memory slots. | |
8030 | * | |
8031 | * kvm_x86_ops->slot_enable_log_dirty is called when switching new slot | |
8032 | * to dirty logging mode. | |
8033 | * | |
8034 | * If kvm_x86_ops dirty logging hooks are invalid, use write protect. | |
8035 | * | |
8036 | * In case of write protect: | |
8037 | * | |
8038 | * Write protect all pages for dirty logging. | |
8039 | * | |
8040 | * All the sptes including the large sptes which point to this | |
8041 | * slot are set to readonly. We can not create any new large | |
8042 | * spte on this slot until the end of the logging. | |
8043 | * | |
8044 | * See the comments in fast_page_fault(). | |
8045 | */ | |
8046 | if (new->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
8047 | if (kvm_x86_ops->slot_enable_log_dirty) | |
8048 | kvm_x86_ops->slot_enable_log_dirty(kvm, new); | |
8049 | else | |
8050 | kvm_mmu_slot_remove_write_access(kvm, new); | |
8051 | } else { | |
8052 | if (kvm_x86_ops->slot_disable_log_dirty) | |
8053 | kvm_x86_ops->slot_disable_log_dirty(kvm, new); | |
8054 | } | |
8055 | } | |
8056 | ||
f7784b8e | 8057 | void kvm_arch_commit_memory_region(struct kvm *kvm, |
09170a49 | 8058 | const struct kvm_userspace_memory_region *mem, |
8482644a | 8059 | const struct kvm_memory_slot *old, |
f36f3f28 | 8060 | const struct kvm_memory_slot *new, |
8482644a | 8061 | enum kvm_mr_change change) |
f7784b8e | 8062 | { |
8482644a | 8063 | int nr_mmu_pages = 0; |
f7784b8e | 8064 | |
48c0e4e9 XG |
8065 | if (!kvm->arch.n_requested_mmu_pages) |
8066 | nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); | |
8067 | ||
48c0e4e9 | 8068 | if (nr_mmu_pages) |
0de10343 | 8069 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); |
1c91cad4 | 8070 | |
3ea3b7fa WL |
8071 | /* |
8072 | * Dirty logging tracks sptes in 4k granularity, meaning that large | |
8073 | * sptes have to be split. If live migration is successful, the guest | |
8074 | * in the source machine will be destroyed and large sptes will be | |
8075 | * created in the destination. However, if the guest continues to run | |
8076 | * in the source machine (for example if live migration fails), small | |
8077 | * sptes will remain around and cause bad performance. | |
8078 | * | |
8079 | * Scan sptes if dirty logging has been stopped, dropping those | |
8080 | * which can be collapsed into a single large-page spte. Later | |
8081 | * page faults will create the large-page sptes. | |
8082 | */ | |
8083 | if ((change != KVM_MR_DELETE) && | |
8084 | (old->flags & KVM_MEM_LOG_DIRTY_PAGES) && | |
8085 | !(new->flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8086 | kvm_mmu_zap_collapsible_sptes(kvm, new); | |
8087 | ||
c972f3b1 | 8088 | /* |
88178fd4 | 8089 | * Set up write protection and/or dirty logging for the new slot. |
c126d94f | 8090 | * |
88178fd4 KH |
8091 | * For KVM_MR_DELETE and KVM_MR_MOVE, the shadow pages of old slot have |
8092 | * been zapped so no dirty logging staff is needed for old slot. For | |
8093 | * KVM_MR_FLAGS_ONLY, the old slot is essentially the same one as the | |
8094 | * new and it's also covered when dealing with the new slot. | |
f36f3f28 PB |
8095 | * |
8096 | * FIXME: const-ify all uses of struct kvm_memory_slot. | |
c972f3b1 | 8097 | */ |
88178fd4 | 8098 | if (change != KVM_MR_DELETE) |
f36f3f28 | 8099 | kvm_mmu_slot_apply_flags(kvm, (struct kvm_memory_slot *) new); |
0de10343 | 8100 | } |
1d737c8a | 8101 | |
2df72e9b | 8102 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
34d4cb8f | 8103 | { |
6ca18b69 | 8104 | kvm_mmu_invalidate_zap_all_pages(kvm); |
34d4cb8f MT |
8105 | } |
8106 | ||
2df72e9b MT |
8107 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
8108 | struct kvm_memory_slot *slot) | |
8109 | { | |
6ca18b69 | 8110 | kvm_mmu_invalidate_zap_all_pages(kvm); |
2df72e9b MT |
8111 | } |
8112 | ||
5d9bc648 PB |
8113 | static inline bool kvm_vcpu_has_events(struct kvm_vcpu *vcpu) |
8114 | { | |
8115 | if (!list_empty_careful(&vcpu->async_pf.done)) | |
8116 | return true; | |
8117 | ||
8118 | if (kvm_apic_has_events(vcpu)) | |
8119 | return true; | |
8120 | ||
8121 | if (vcpu->arch.pv.pv_unhalted) | |
8122 | return true; | |
8123 | ||
8124 | if (atomic_read(&vcpu->arch.nmi_queued)) | |
8125 | return true; | |
8126 | ||
73917739 PB |
8127 | if (test_bit(KVM_REQ_SMI, &vcpu->requests)) |
8128 | return true; | |
8129 | ||
5d9bc648 PB |
8130 | if (kvm_arch_interrupt_allowed(vcpu) && |
8131 | kvm_cpu_has_interrupt(vcpu)) | |
8132 | return true; | |
8133 | ||
1f4b34f8 AS |
8134 | if (kvm_hv_has_stimer_pending(vcpu)) |
8135 | return true; | |
8136 | ||
5d9bc648 PB |
8137 | return false; |
8138 | } | |
8139 | ||
1d737c8a ZX |
8140 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
8141 | { | |
b6b8a145 JK |
8142 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) |
8143 | kvm_x86_ops->check_nested_events(vcpu, false); | |
8144 | ||
5d9bc648 | 8145 | return kvm_vcpu_running(vcpu) || kvm_vcpu_has_events(vcpu); |
1d737c8a | 8146 | } |
5736199a | 8147 | |
b6d33834 | 8148 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
5736199a | 8149 | { |
b6d33834 | 8150 | return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; |
5736199a | 8151 | } |
78646121 GN |
8152 | |
8153 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
8154 | { | |
8155 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
8156 | } | |
229456fc | 8157 | |
82b32774 | 8158 | unsigned long kvm_get_linear_rip(struct kvm_vcpu *vcpu) |
f92653ee | 8159 | { |
82b32774 NA |
8160 | if (is_64_bit_mode(vcpu)) |
8161 | return kvm_rip_read(vcpu); | |
8162 | return (u32)(get_segment_base(vcpu, VCPU_SREG_CS) + | |
8163 | kvm_rip_read(vcpu)); | |
8164 | } | |
8165 | EXPORT_SYMBOL_GPL(kvm_get_linear_rip); | |
f92653ee | 8166 | |
82b32774 NA |
8167 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
8168 | { | |
8169 | return kvm_get_linear_rip(vcpu) == linear_rip; | |
f92653ee JK |
8170 | } |
8171 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); | |
8172 | ||
94fe45da JK |
8173 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
8174 | { | |
8175 | unsigned long rflags; | |
8176 | ||
8177 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
8178 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
c310bac5 | 8179 | rflags &= ~X86_EFLAGS_TF; |
94fe45da JK |
8180 | return rflags; |
8181 | } | |
8182 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
8183 | ||
6addfc42 | 8184 | static void __kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) |
94fe45da JK |
8185 | { |
8186 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
f92653ee | 8187 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
c310bac5 | 8188 | rflags |= X86_EFLAGS_TF; |
94fe45da | 8189 | kvm_x86_ops->set_rflags(vcpu, rflags); |
6addfc42 PB |
8190 | } |
8191 | ||
8192 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
8193 | { | |
8194 | __kvm_set_rflags(vcpu, rflags); | |
3842d135 | 8195 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
94fe45da JK |
8196 | } |
8197 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
8198 | ||
56028d08 GN |
8199 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work) |
8200 | { | |
8201 | int r; | |
8202 | ||
fb67e14f | 8203 | if ((vcpu->arch.mmu.direct_map != work->arch.direct_map) || |
f2e10669 | 8204 | work->wakeup_all) |
56028d08 GN |
8205 | return; |
8206 | ||
8207 | r = kvm_mmu_reload(vcpu); | |
8208 | if (unlikely(r)) | |
8209 | return; | |
8210 | ||
fb67e14f XG |
8211 | if (!vcpu->arch.mmu.direct_map && |
8212 | work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu)) | |
8213 | return; | |
8214 | ||
56028d08 GN |
8215 | vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true); |
8216 | } | |
8217 | ||
af585b92 GN |
8218 | static inline u32 kvm_async_pf_hash_fn(gfn_t gfn) |
8219 | { | |
8220 | return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU)); | |
8221 | } | |
8222 | ||
8223 | static inline u32 kvm_async_pf_next_probe(u32 key) | |
8224 | { | |
8225 | return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1); | |
8226 | } | |
8227 | ||
8228 | static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
8229 | { | |
8230 | u32 key = kvm_async_pf_hash_fn(gfn); | |
8231 | ||
8232 | while (vcpu->arch.apf.gfns[key] != ~0) | |
8233 | key = kvm_async_pf_next_probe(key); | |
8234 | ||
8235 | vcpu->arch.apf.gfns[key] = gfn; | |
8236 | } | |
8237 | ||
8238 | static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn) | |
8239 | { | |
8240 | int i; | |
8241 | u32 key = kvm_async_pf_hash_fn(gfn); | |
8242 | ||
8243 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) && | |
c7d28c24 XG |
8244 | (vcpu->arch.apf.gfns[key] != gfn && |
8245 | vcpu->arch.apf.gfns[key] != ~0); i++) | |
af585b92 GN |
8246 | key = kvm_async_pf_next_probe(key); |
8247 | ||
8248 | return key; | |
8249 | } | |
8250 | ||
8251 | bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
8252 | { | |
8253 | return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn; | |
8254 | } | |
8255 | ||
8256 | static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
8257 | { | |
8258 | u32 i, j, k; | |
8259 | ||
8260 | i = j = kvm_async_pf_gfn_slot(vcpu, gfn); | |
8261 | while (true) { | |
8262 | vcpu->arch.apf.gfns[i] = ~0; | |
8263 | do { | |
8264 | j = kvm_async_pf_next_probe(j); | |
8265 | if (vcpu->arch.apf.gfns[j] == ~0) | |
8266 | return; | |
8267 | k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]); | |
8268 | /* | |
8269 | * k lies cyclically in ]i,j] | |
8270 | * | i.k.j | | |
8271 | * |....j i.k.| or |.k..j i...| | |
8272 | */ | |
8273 | } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j)); | |
8274 | vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j]; | |
8275 | i = j; | |
8276 | } | |
8277 | } | |
8278 | ||
7c90705b GN |
8279 | static int apf_put_user(struct kvm_vcpu *vcpu, u32 val) |
8280 | { | |
8281 | ||
8282 | return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val, | |
8283 | sizeof(val)); | |
8284 | } | |
8285 | ||
af585b92 GN |
8286 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
8287 | struct kvm_async_pf *work) | |
8288 | { | |
6389ee94 AK |
8289 | struct x86_exception fault; |
8290 | ||
7c90705b | 8291 | trace_kvm_async_pf_not_present(work->arch.token, work->gva); |
af585b92 | 8292 | kvm_add_async_pf_gfn(vcpu, work->arch.gfn); |
7c90705b GN |
8293 | |
8294 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) || | |
fc5f06fa GN |
8295 | (vcpu->arch.apf.send_user_only && |
8296 | kvm_x86_ops->get_cpl(vcpu) == 0)) | |
7c90705b GN |
8297 | kvm_make_request(KVM_REQ_APF_HALT, vcpu); |
8298 | else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) { | |
6389ee94 AK |
8299 | fault.vector = PF_VECTOR; |
8300 | fault.error_code_valid = true; | |
8301 | fault.error_code = 0; | |
8302 | fault.nested_page_fault = false; | |
8303 | fault.address = work->arch.token; | |
8304 | kvm_inject_page_fault(vcpu, &fault); | |
7c90705b | 8305 | } |
af585b92 GN |
8306 | } |
8307 | ||
8308 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
8309 | struct kvm_async_pf *work) | |
8310 | { | |
6389ee94 AK |
8311 | struct x86_exception fault; |
8312 | ||
7c90705b | 8313 | trace_kvm_async_pf_ready(work->arch.token, work->gva); |
f2e10669 | 8314 | if (work->wakeup_all) |
7c90705b GN |
8315 | work->arch.token = ~0; /* broadcast wakeup */ |
8316 | else | |
8317 | kvm_del_async_pf_gfn(vcpu, work->arch.gfn); | |
8318 | ||
8319 | if ((vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) && | |
8320 | !apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) { | |
6389ee94 AK |
8321 | fault.vector = PF_VECTOR; |
8322 | fault.error_code_valid = true; | |
8323 | fault.error_code = 0; | |
8324 | fault.nested_page_fault = false; | |
8325 | fault.address = work->arch.token; | |
8326 | kvm_inject_page_fault(vcpu, &fault); | |
7c90705b | 8327 | } |
e6d53e3b | 8328 | vcpu->arch.apf.halted = false; |
a4fa1635 | 8329 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
7c90705b GN |
8330 | } |
8331 | ||
8332 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
8333 | { | |
8334 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED)) | |
8335 | return true; | |
8336 | else | |
8337 | return !kvm_event_needs_reinjection(vcpu) && | |
8338 | kvm_x86_ops->interrupt_allowed(vcpu); | |
af585b92 GN |
8339 | } |
8340 | ||
5544eb9b PB |
8341 | void kvm_arch_start_assignment(struct kvm *kvm) |
8342 | { | |
8343 | atomic_inc(&kvm->arch.assigned_device_count); | |
8344 | } | |
8345 | EXPORT_SYMBOL_GPL(kvm_arch_start_assignment); | |
8346 | ||
8347 | void kvm_arch_end_assignment(struct kvm *kvm) | |
8348 | { | |
8349 | atomic_dec(&kvm->arch.assigned_device_count); | |
8350 | } | |
8351 | EXPORT_SYMBOL_GPL(kvm_arch_end_assignment); | |
8352 | ||
8353 | bool kvm_arch_has_assigned_device(struct kvm *kvm) | |
8354 | { | |
8355 | return atomic_read(&kvm->arch.assigned_device_count); | |
8356 | } | |
8357 | EXPORT_SYMBOL_GPL(kvm_arch_has_assigned_device); | |
8358 | ||
e0f0bbc5 AW |
8359 | void kvm_arch_register_noncoherent_dma(struct kvm *kvm) |
8360 | { | |
8361 | atomic_inc(&kvm->arch.noncoherent_dma_count); | |
8362 | } | |
8363 | EXPORT_SYMBOL_GPL(kvm_arch_register_noncoherent_dma); | |
8364 | ||
8365 | void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm) | |
8366 | { | |
8367 | atomic_dec(&kvm->arch.noncoherent_dma_count); | |
8368 | } | |
8369 | EXPORT_SYMBOL_GPL(kvm_arch_unregister_noncoherent_dma); | |
8370 | ||
8371 | bool kvm_arch_has_noncoherent_dma(struct kvm *kvm) | |
8372 | { | |
8373 | return atomic_read(&kvm->arch.noncoherent_dma_count); | |
8374 | } | |
8375 | EXPORT_SYMBOL_GPL(kvm_arch_has_noncoherent_dma); | |
8376 | ||
14717e20 AW |
8377 | bool kvm_arch_has_irq_bypass(void) |
8378 | { | |
8379 | return kvm_x86_ops->update_pi_irte != NULL; | |
8380 | } | |
8381 | ||
87276880 FW |
8382 | int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons, |
8383 | struct irq_bypass_producer *prod) | |
8384 | { | |
8385 | struct kvm_kernel_irqfd *irqfd = | |
8386 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
8387 | ||
14717e20 | 8388 | irqfd->producer = prod; |
87276880 | 8389 | |
14717e20 AW |
8390 | return kvm_x86_ops->update_pi_irte(irqfd->kvm, |
8391 | prod->irq, irqfd->gsi, 1); | |
87276880 FW |
8392 | } |
8393 | ||
8394 | void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons, | |
8395 | struct irq_bypass_producer *prod) | |
8396 | { | |
8397 | int ret; | |
8398 | struct kvm_kernel_irqfd *irqfd = | |
8399 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
8400 | ||
87276880 FW |
8401 | WARN_ON(irqfd->producer != prod); |
8402 | irqfd->producer = NULL; | |
8403 | ||
8404 | /* | |
8405 | * When producer of consumer is unregistered, we change back to | |
8406 | * remapped mode, so we can re-use the current implementation | |
8407 | * when the irq is masked/disabed or the consumer side (KVM | |
8408 | * int this case doesn't want to receive the interrupts. | |
8409 | */ | |
8410 | ret = kvm_x86_ops->update_pi_irte(irqfd->kvm, prod->irq, irqfd->gsi, 0); | |
8411 | if (ret) | |
8412 | printk(KERN_INFO "irq bypass consumer (token %p) unregistration" | |
8413 | " fails: %d\n", irqfd->consumer.token, ret); | |
8414 | } | |
8415 | ||
8416 | int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq, | |
8417 | uint32_t guest_irq, bool set) | |
8418 | { | |
8419 | if (!kvm_x86_ops->update_pi_irte) | |
8420 | return -EINVAL; | |
8421 | ||
8422 | return kvm_x86_ops->update_pi_irte(kvm, host_irq, guest_irq, set); | |
8423 | } | |
8424 | ||
52004014 FW |
8425 | bool kvm_vector_hashing_enabled(void) |
8426 | { | |
8427 | return vector_hashing; | |
8428 | } | |
8429 | EXPORT_SYMBOL_GPL(kvm_vector_hashing_enabled); | |
8430 | ||
229456fc | 8431 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
931c33b1 | 8432 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_fast_mmio); |
229456fc MT |
8433 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); |
8434 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
8435 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
8436 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 8437 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 8438 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 8439 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 8440 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 8441 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 8442 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
2e554e8d | 8443 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |
489223ed | 8444 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_write_tsc_offset); |
7b46268d | 8445 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ple_window); |
843e4330 | 8446 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pml_full); |
efc64404 | 8447 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pi_irte_update); |
18f40c53 SS |
8448 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_unaccelerated_access); |
8449 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_incomplete_ipi); |