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" |
313a3dc7 | 30 | |
18068523 | 31 | #include <linux/clocksource.h> |
4d5c5d0f | 32 | #include <linux/interrupt.h> |
313a3dc7 CO |
33 | #include <linux/kvm.h> |
34 | #include <linux/fs.h> | |
35 | #include <linux/vmalloc.h> | |
5fb76f9b | 36 | #include <linux/module.h> |
0de10343 | 37 | #include <linux/mman.h> |
2bacc55c | 38 | #include <linux/highmem.h> |
19de40a8 | 39 | #include <linux/iommu.h> |
62c476c7 | 40 | #include <linux/intel-iommu.h> |
c8076604 | 41 | #include <linux/cpufreq.h> |
18863bdd | 42 | #include <linux/user-return-notifier.h> |
a983fb23 | 43 | #include <linux/srcu.h> |
5a0e3ad6 | 44 | #include <linux/slab.h> |
ff9d07a0 | 45 | #include <linux/perf_event.h> |
7bee342a | 46 | #include <linux/uaccess.h> |
af585b92 | 47 | #include <linux/hash.h> |
a1b60c1c | 48 | #include <linux/pci.h> |
16e8d74d MT |
49 | #include <linux/timekeeper_internal.h> |
50 | #include <linux/pvclock_gtod.h> | |
aec51dc4 | 51 | #include <trace/events/kvm.h> |
2ed152af | 52 | |
229456fc MT |
53 | #define CREATE_TRACE_POINTS |
54 | #include "trace.h" | |
043405e1 | 55 | |
24f1e32c | 56 | #include <asm/debugreg.h> |
d825ed0a | 57 | #include <asm/msr.h> |
a5f61300 | 58 | #include <asm/desc.h> |
0bed3b56 | 59 | #include <asm/mtrr.h> |
890ca9ae | 60 | #include <asm/mce.h> |
7cf30855 | 61 | #include <asm/i387.h> |
1361b83a | 62 | #include <asm/fpu-internal.h> /* Ugh! */ |
98918833 | 63 | #include <asm/xcr.h> |
1d5f066e | 64 | #include <asm/pvclock.h> |
217fc9cf | 65 | #include <asm/div64.h> |
043405e1 | 66 | |
313a3dc7 | 67 | #define MAX_IO_MSRS 256 |
890ca9ae | 68 | #define KVM_MAX_MCE_BANKS 32 |
5854dbca | 69 | #define KVM_MCE_CAP_SUPPORTED (MCG_CTL_P | MCG_SER_P) |
890ca9ae | 70 | |
0f65dd70 AK |
71 | #define emul_to_vcpu(ctxt) \ |
72 | container_of(ctxt, struct kvm_vcpu, arch.emulate_ctxt) | |
73 | ||
50a37eb4 JR |
74 | /* EFER defaults: |
75 | * - enable syscall per default because its emulated by KVM | |
76 | * - enable LME and LMA per default on 64 bit KVM | |
77 | */ | |
78 | #ifdef CONFIG_X86_64 | |
1260edbe LJ |
79 | static |
80 | u64 __read_mostly efer_reserved_bits = ~((u64)(EFER_SCE | EFER_LME | EFER_LMA)); | |
50a37eb4 | 81 | #else |
1260edbe | 82 | static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE); |
50a37eb4 | 83 | #endif |
313a3dc7 | 84 | |
ba1389b7 AK |
85 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
86 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 87 | |
cb142eb7 | 88 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
7460fb4a | 89 | static void process_nmi(struct kvm_vcpu *vcpu); |
6addfc42 | 90 | static void __kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); |
674eea0f | 91 | |
97896d04 | 92 | struct kvm_x86_ops *kvm_x86_ops; |
5fdbf976 | 93 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 94 | |
476bc001 RR |
95 | static bool ignore_msrs = 0; |
96 | module_param(ignore_msrs, bool, S_IRUGO | S_IWUSR); | |
ed85c068 | 97 | |
9ed96e87 MT |
98 | unsigned int min_timer_period_us = 500; |
99 | module_param(min_timer_period_us, uint, S_IRUGO | S_IWUSR); | |
100 | ||
92a1f12d JR |
101 | bool kvm_has_tsc_control; |
102 | EXPORT_SYMBOL_GPL(kvm_has_tsc_control); | |
103 | u32 kvm_max_guest_tsc_khz; | |
104 | EXPORT_SYMBOL_GPL(kvm_max_guest_tsc_khz); | |
105 | ||
cc578287 ZA |
106 | /* tsc tolerance in parts per million - default to 1/2 of the NTP threshold */ |
107 | static u32 tsc_tolerance_ppm = 250; | |
108 | module_param(tsc_tolerance_ppm, uint, S_IRUGO | S_IWUSR); | |
109 | ||
16a96021 MT |
110 | static bool backwards_tsc_observed = false; |
111 | ||
18863bdd AK |
112 | #define KVM_NR_SHARED_MSRS 16 |
113 | ||
114 | struct kvm_shared_msrs_global { | |
115 | int nr; | |
2bf78fa7 | 116 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
117 | }; |
118 | ||
119 | struct kvm_shared_msrs { | |
120 | struct user_return_notifier urn; | |
121 | bool registered; | |
2bf78fa7 SY |
122 | struct kvm_shared_msr_values { |
123 | u64 host; | |
124 | u64 curr; | |
125 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
126 | }; |
127 | ||
128 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
013f6a5d | 129 | static struct kvm_shared_msrs __percpu *shared_msrs; |
18863bdd | 130 | |
417bc304 | 131 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
132 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
133 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
134 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
135 | { "invlpg", VCPU_STAT(invlpg) }, | |
136 | { "exits", VCPU_STAT(exits) }, | |
137 | { "io_exits", VCPU_STAT(io_exits) }, | |
138 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
139 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
140 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 141 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 AK |
142 | { "halt_exits", VCPU_STAT(halt_exits) }, |
143 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, | |
f11c3a8d | 144 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
145 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
146 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
147 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
148 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
149 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
150 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
151 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 152 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 153 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
154 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
155 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
156 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
157 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
158 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
159 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 160 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 161 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 162 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 163 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
164 | { NULL } |
165 | }; | |
166 | ||
2acf923e DC |
167 | u64 __read_mostly host_xcr0; |
168 | ||
b6785def | 169 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt); |
d6aa1000 | 170 | |
af585b92 GN |
171 | static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu) |
172 | { | |
173 | int i; | |
174 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU); i++) | |
175 | vcpu->arch.apf.gfns[i] = ~0; | |
176 | } | |
177 | ||
18863bdd AK |
178 | static void kvm_on_user_return(struct user_return_notifier *urn) |
179 | { | |
180 | unsigned slot; | |
18863bdd AK |
181 | struct kvm_shared_msrs *locals |
182 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 183 | struct kvm_shared_msr_values *values; |
18863bdd AK |
184 | |
185 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { | |
2bf78fa7 SY |
186 | values = &locals->values[slot]; |
187 | if (values->host != values->curr) { | |
188 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
189 | values->curr = values->host; | |
18863bdd AK |
190 | } |
191 | } | |
192 | locals->registered = false; | |
193 | user_return_notifier_unregister(urn); | |
194 | } | |
195 | ||
2bf78fa7 | 196 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 197 | { |
18863bdd | 198 | u64 value; |
013f6a5d MT |
199 | unsigned int cpu = smp_processor_id(); |
200 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
18863bdd | 201 | |
2bf78fa7 SY |
202 | /* only read, and nobody should modify it at this time, |
203 | * so don't need lock */ | |
204 | if (slot >= shared_msrs_global.nr) { | |
205 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
206 | return; | |
207 | } | |
208 | rdmsrl_safe(msr, &value); | |
209 | smsr->values[slot].host = value; | |
210 | smsr->values[slot].curr = value; | |
211 | } | |
212 | ||
213 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
214 | { | |
0123be42 | 215 | BUG_ON(slot >= KVM_NR_SHARED_MSRS); |
18863bdd AK |
216 | if (slot >= shared_msrs_global.nr) |
217 | shared_msrs_global.nr = slot + 1; | |
2bf78fa7 SY |
218 | shared_msrs_global.msrs[slot] = msr; |
219 | /* we need ensured the shared_msr_global have been updated */ | |
220 | smp_wmb(); | |
18863bdd AK |
221 | } |
222 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
223 | ||
224 | static void kvm_shared_msr_cpu_online(void) | |
225 | { | |
226 | unsigned i; | |
18863bdd AK |
227 | |
228 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 229 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
230 | } |
231 | ||
d5696725 | 232 | void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd | 233 | { |
013f6a5d MT |
234 | unsigned int cpu = smp_processor_id(); |
235 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
18863bdd | 236 | |
2bf78fa7 | 237 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
18863bdd | 238 | return; |
2bf78fa7 SY |
239 | smsr->values[slot].curr = value; |
240 | wrmsrl(shared_msrs_global.msrs[slot], value); | |
18863bdd AK |
241 | if (!smsr->registered) { |
242 | smsr->urn.on_user_return = kvm_on_user_return; | |
243 | user_return_notifier_register(&smsr->urn); | |
244 | smsr->registered = true; | |
245 | } | |
246 | } | |
247 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
248 | ||
13a34e06 | 249 | static void drop_user_return_notifiers(void) |
3548bab5 | 250 | { |
013f6a5d MT |
251 | unsigned int cpu = smp_processor_id(); |
252 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
3548bab5 AK |
253 | |
254 | if (smsr->registered) | |
255 | kvm_on_user_return(&smsr->urn); | |
256 | } | |
257 | ||
6866b83e CO |
258 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
259 | { | |
8a5a87d9 | 260 | return vcpu->arch.apic_base; |
6866b83e CO |
261 | } |
262 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
263 | ||
58cb628d JK |
264 | int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
265 | { | |
266 | u64 old_state = vcpu->arch.apic_base & | |
267 | (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); | |
268 | u64 new_state = msr_info->data & | |
269 | (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); | |
270 | u64 reserved_bits = ((~0ULL) << cpuid_maxphyaddr(vcpu)) | | |
271 | 0x2ff | (guest_cpuid_has_x2apic(vcpu) ? 0 : X2APIC_ENABLE); | |
272 | ||
273 | if (!msr_info->host_initiated && | |
274 | ((msr_info->data & reserved_bits) != 0 || | |
275 | new_state == X2APIC_ENABLE || | |
276 | (new_state == MSR_IA32_APICBASE_ENABLE && | |
277 | old_state == (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE)) || | |
278 | (new_state == (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE) && | |
279 | old_state == 0))) | |
280 | return 1; | |
281 | ||
282 | kvm_lapic_set_base(vcpu, msr_info->data); | |
283 | return 0; | |
6866b83e CO |
284 | } |
285 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
286 | ||
2605fc21 | 287 | asmlinkage __visible void kvm_spurious_fault(void) |
e3ba45b8 GL |
288 | { |
289 | /* Fault while not rebooting. We want the trace. */ | |
290 | BUG(); | |
291 | } | |
292 | EXPORT_SYMBOL_GPL(kvm_spurious_fault); | |
293 | ||
3fd28fce ED |
294 | #define EXCPT_BENIGN 0 |
295 | #define EXCPT_CONTRIBUTORY 1 | |
296 | #define EXCPT_PF 2 | |
297 | ||
298 | static int exception_class(int vector) | |
299 | { | |
300 | switch (vector) { | |
301 | case PF_VECTOR: | |
302 | return EXCPT_PF; | |
303 | case DE_VECTOR: | |
304 | case TS_VECTOR: | |
305 | case NP_VECTOR: | |
306 | case SS_VECTOR: | |
307 | case GP_VECTOR: | |
308 | return EXCPT_CONTRIBUTORY; | |
309 | default: | |
310 | break; | |
311 | } | |
312 | return EXCPT_BENIGN; | |
313 | } | |
314 | ||
d6e8c854 NA |
315 | #define EXCPT_FAULT 0 |
316 | #define EXCPT_TRAP 1 | |
317 | #define EXCPT_ABORT 2 | |
318 | #define EXCPT_INTERRUPT 3 | |
319 | ||
320 | static int exception_type(int vector) | |
321 | { | |
322 | unsigned int mask; | |
323 | ||
324 | if (WARN_ON(vector > 31 || vector == NMI_VECTOR)) | |
325 | return EXCPT_INTERRUPT; | |
326 | ||
327 | mask = 1 << vector; | |
328 | ||
329 | /* #DB is trap, as instruction watchpoints are handled elsewhere */ | |
330 | if (mask & ((1 << DB_VECTOR) | (1 << BP_VECTOR) | (1 << OF_VECTOR))) | |
331 | return EXCPT_TRAP; | |
332 | ||
333 | if (mask & ((1 << DF_VECTOR) | (1 << MC_VECTOR))) | |
334 | return EXCPT_ABORT; | |
335 | ||
336 | /* Reserved exceptions will result in fault */ | |
337 | return EXCPT_FAULT; | |
338 | } | |
339 | ||
3fd28fce | 340 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, |
ce7ddec4 JR |
341 | unsigned nr, bool has_error, u32 error_code, |
342 | bool reinject) | |
3fd28fce ED |
343 | { |
344 | u32 prev_nr; | |
345 | int class1, class2; | |
346 | ||
3842d135 AK |
347 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
348 | ||
3fd28fce ED |
349 | if (!vcpu->arch.exception.pending) { |
350 | queue: | |
351 | vcpu->arch.exception.pending = true; | |
352 | vcpu->arch.exception.has_error_code = has_error; | |
353 | vcpu->arch.exception.nr = nr; | |
354 | vcpu->arch.exception.error_code = error_code; | |
3f0fd292 | 355 | vcpu->arch.exception.reinject = reinject; |
3fd28fce ED |
356 | return; |
357 | } | |
358 | ||
359 | /* to check exception */ | |
360 | prev_nr = vcpu->arch.exception.nr; | |
361 | if (prev_nr == DF_VECTOR) { | |
362 | /* triple fault -> shutdown */ | |
a8eeb04a | 363 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
3fd28fce ED |
364 | return; |
365 | } | |
366 | class1 = exception_class(prev_nr); | |
367 | class2 = exception_class(nr); | |
368 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
369 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
370 | /* generate double fault per SDM Table 5-5 */ | |
371 | vcpu->arch.exception.pending = true; | |
372 | vcpu->arch.exception.has_error_code = true; | |
373 | vcpu->arch.exception.nr = DF_VECTOR; | |
374 | vcpu->arch.exception.error_code = 0; | |
375 | } else | |
376 | /* replace previous exception with a new one in a hope | |
377 | that instruction re-execution will regenerate lost | |
378 | exception */ | |
379 | goto queue; | |
380 | } | |
381 | ||
298101da AK |
382 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
383 | { | |
ce7ddec4 | 384 | kvm_multiple_exception(vcpu, nr, false, 0, false); |
298101da AK |
385 | } |
386 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
387 | ||
ce7ddec4 JR |
388 | void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
389 | { | |
390 | kvm_multiple_exception(vcpu, nr, false, 0, true); | |
391 | } | |
392 | EXPORT_SYMBOL_GPL(kvm_requeue_exception); | |
393 | ||
db8fcefa | 394 | void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err) |
c3c91fee | 395 | { |
db8fcefa AP |
396 | if (err) |
397 | kvm_inject_gp(vcpu, 0); | |
398 | else | |
399 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
400 | } | |
401 | EXPORT_SYMBOL_GPL(kvm_complete_insn_gp); | |
8df25a32 | 402 | |
6389ee94 | 403 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
c3c91fee AK |
404 | { |
405 | ++vcpu->stat.pf_guest; | |
6389ee94 AK |
406 | vcpu->arch.cr2 = fault->address; |
407 | kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code); | |
c3c91fee | 408 | } |
27d6c865 | 409 | EXPORT_SYMBOL_GPL(kvm_inject_page_fault); |
c3c91fee | 410 | |
ef54bcfe | 411 | static bool kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
d4f8cf66 | 412 | { |
6389ee94 AK |
413 | if (mmu_is_nested(vcpu) && !fault->nested_page_fault) |
414 | vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault); | |
d4f8cf66 | 415 | else |
6389ee94 | 416 | vcpu->arch.mmu.inject_page_fault(vcpu, fault); |
ef54bcfe PB |
417 | |
418 | return fault->nested_page_fault; | |
d4f8cf66 JR |
419 | } |
420 | ||
3419ffc8 SY |
421 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
422 | { | |
7460fb4a AK |
423 | atomic_inc(&vcpu->arch.nmi_queued); |
424 | kvm_make_request(KVM_REQ_NMI, vcpu); | |
3419ffc8 SY |
425 | } |
426 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
427 | ||
298101da AK |
428 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
429 | { | |
ce7ddec4 | 430 | kvm_multiple_exception(vcpu, nr, true, error_code, false); |
298101da AK |
431 | } |
432 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
433 | ||
ce7ddec4 JR |
434 | void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
435 | { | |
436 | kvm_multiple_exception(vcpu, nr, true, error_code, true); | |
437 | } | |
438 | EXPORT_SYMBOL_GPL(kvm_requeue_exception_e); | |
439 | ||
0a79b009 AK |
440 | /* |
441 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
442 | * a #GP and return false. | |
443 | */ | |
444 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 445 | { |
0a79b009 AK |
446 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
447 | return true; | |
448 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
449 | return false; | |
298101da | 450 | } |
0a79b009 | 451 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 452 | |
ec92fe44 JR |
453 | /* |
454 | * This function will be used to read from the physical memory of the currently | |
455 | * running guest. The difference to kvm_read_guest_page is that this function | |
456 | * can read from guest physical or from the guest's guest physical memory. | |
457 | */ | |
458 | int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, | |
459 | gfn_t ngfn, void *data, int offset, int len, | |
460 | u32 access) | |
461 | { | |
54987b7a | 462 | struct x86_exception exception; |
ec92fe44 JR |
463 | gfn_t real_gfn; |
464 | gpa_t ngpa; | |
465 | ||
466 | ngpa = gfn_to_gpa(ngfn); | |
54987b7a | 467 | real_gfn = mmu->translate_gpa(vcpu, ngpa, access, &exception); |
ec92fe44 JR |
468 | if (real_gfn == UNMAPPED_GVA) |
469 | return -EFAULT; | |
470 | ||
471 | real_gfn = gpa_to_gfn(real_gfn); | |
472 | ||
473 | return kvm_read_guest_page(vcpu->kvm, real_gfn, data, offset, len); | |
474 | } | |
475 | EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu); | |
476 | ||
3d06b8bf JR |
477 | int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, |
478 | void *data, int offset, int len, u32 access) | |
479 | { | |
480 | return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn, | |
481 | data, offset, len, access); | |
482 | } | |
483 | ||
a03490ed CO |
484 | /* |
485 | * Load the pae pdptrs. Return true is they are all valid. | |
486 | */ | |
ff03a073 | 487 | int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3) |
a03490ed CO |
488 | { |
489 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
490 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
491 | int i; | |
492 | int ret; | |
ff03a073 | 493 | u64 pdpte[ARRAY_SIZE(mmu->pdptrs)]; |
a03490ed | 494 | |
ff03a073 JR |
495 | ret = kvm_read_guest_page_mmu(vcpu, mmu, pdpt_gfn, pdpte, |
496 | offset * sizeof(u64), sizeof(pdpte), | |
497 | PFERR_USER_MASK|PFERR_WRITE_MASK); | |
a03490ed CO |
498 | if (ret < 0) { |
499 | ret = 0; | |
500 | goto out; | |
501 | } | |
502 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
43a3795a | 503 | if (is_present_gpte(pdpte[i]) && |
20c466b5 | 504 | (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) { |
a03490ed CO |
505 | ret = 0; |
506 | goto out; | |
507 | } | |
508 | } | |
509 | ret = 1; | |
510 | ||
ff03a073 | 511 | memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs)); |
6de4f3ad AK |
512 | __set_bit(VCPU_EXREG_PDPTR, |
513 | (unsigned long *)&vcpu->arch.regs_avail); | |
514 | __set_bit(VCPU_EXREG_PDPTR, | |
515 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 516 | out: |
a03490ed CO |
517 | |
518 | return ret; | |
519 | } | |
cc4b6871 | 520 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 521 | |
d835dfec AK |
522 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
523 | { | |
ff03a073 | 524 | u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)]; |
d835dfec | 525 | bool changed = true; |
3d06b8bf JR |
526 | int offset; |
527 | gfn_t gfn; | |
d835dfec AK |
528 | int r; |
529 | ||
530 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
531 | return false; | |
532 | ||
6de4f3ad AK |
533 | if (!test_bit(VCPU_EXREG_PDPTR, |
534 | (unsigned long *)&vcpu->arch.regs_avail)) | |
535 | return true; | |
536 | ||
9f8fe504 AK |
537 | gfn = (kvm_read_cr3(vcpu) & ~31u) >> PAGE_SHIFT; |
538 | offset = (kvm_read_cr3(vcpu) & ~31u) & (PAGE_SIZE - 1); | |
3d06b8bf JR |
539 | r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte), |
540 | PFERR_USER_MASK | PFERR_WRITE_MASK); | |
d835dfec AK |
541 | if (r < 0) |
542 | goto out; | |
ff03a073 | 543 | changed = memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 544 | out: |
d835dfec AK |
545 | |
546 | return changed; | |
547 | } | |
548 | ||
49a9b07e | 549 | int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed | 550 | { |
aad82703 SY |
551 | unsigned long old_cr0 = kvm_read_cr0(vcpu); |
552 | unsigned long update_bits = X86_CR0_PG | X86_CR0_WP | | |
553 | X86_CR0_CD | X86_CR0_NW; | |
554 | ||
f9a48e6a AK |
555 | cr0 |= X86_CR0_ET; |
556 | ||
ab344828 | 557 | #ifdef CONFIG_X86_64 |
0f12244f GN |
558 | if (cr0 & 0xffffffff00000000UL) |
559 | return 1; | |
ab344828 GN |
560 | #endif |
561 | ||
562 | cr0 &= ~CR0_RESERVED_BITS; | |
a03490ed | 563 | |
0f12244f GN |
564 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) |
565 | return 1; | |
a03490ed | 566 | |
0f12244f GN |
567 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) |
568 | return 1; | |
a03490ed CO |
569 | |
570 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
571 | #ifdef CONFIG_X86_64 | |
f6801dff | 572 | if ((vcpu->arch.efer & EFER_LME)) { |
a03490ed CO |
573 | int cs_db, cs_l; |
574 | ||
0f12244f GN |
575 | if (!is_pae(vcpu)) |
576 | return 1; | |
a03490ed | 577 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
0f12244f GN |
578 | if (cs_l) |
579 | return 1; | |
a03490ed CO |
580 | } else |
581 | #endif | |
ff03a073 | 582 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
9f8fe504 | 583 | kvm_read_cr3(vcpu))) |
0f12244f | 584 | return 1; |
a03490ed CO |
585 | } |
586 | ||
ad756a16 MJ |
587 | if (!(cr0 & X86_CR0_PG) && kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE)) |
588 | return 1; | |
589 | ||
a03490ed | 590 | kvm_x86_ops->set_cr0(vcpu, cr0); |
a03490ed | 591 | |
d170c419 | 592 | if ((cr0 ^ old_cr0) & X86_CR0_PG) { |
e5f3f027 | 593 | kvm_clear_async_pf_completion_queue(vcpu); |
d170c419 LJ |
594 | kvm_async_pf_hash_reset(vcpu); |
595 | } | |
e5f3f027 | 596 | |
aad82703 SY |
597 | if ((cr0 ^ old_cr0) & update_bits) |
598 | kvm_mmu_reset_context(vcpu); | |
0f12244f GN |
599 | return 0; |
600 | } | |
2d3ad1f4 | 601 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 602 | |
2d3ad1f4 | 603 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 604 | { |
49a9b07e | 605 | (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f)); |
a03490ed | 606 | } |
2d3ad1f4 | 607 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 608 | |
42bdf991 MT |
609 | static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu) |
610 | { | |
611 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) && | |
612 | !vcpu->guest_xcr0_loaded) { | |
613 | /* kvm_set_xcr() also depends on this */ | |
614 | xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0); | |
615 | vcpu->guest_xcr0_loaded = 1; | |
616 | } | |
617 | } | |
618 | ||
619 | static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu) | |
620 | { | |
621 | if (vcpu->guest_xcr0_loaded) { | |
622 | if (vcpu->arch.xcr0 != host_xcr0) | |
623 | xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0); | |
624 | vcpu->guest_xcr0_loaded = 0; | |
625 | } | |
626 | } | |
627 | ||
2acf923e DC |
628 | int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) |
629 | { | |
56c103ec LJ |
630 | u64 xcr0 = xcr; |
631 | u64 old_xcr0 = vcpu->arch.xcr0; | |
46c34cb0 | 632 | u64 valid_bits; |
2acf923e DC |
633 | |
634 | /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */ | |
635 | if (index != XCR_XFEATURE_ENABLED_MASK) | |
636 | return 1; | |
2acf923e DC |
637 | if (!(xcr0 & XSTATE_FP)) |
638 | return 1; | |
639 | if ((xcr0 & XSTATE_YMM) && !(xcr0 & XSTATE_SSE)) | |
640 | return 1; | |
46c34cb0 PB |
641 | |
642 | /* | |
643 | * Do not allow the guest to set bits that we do not support | |
644 | * saving. However, xcr0 bit 0 is always set, even if the | |
645 | * emulated CPU does not support XSAVE (see fx_init). | |
646 | */ | |
647 | valid_bits = vcpu->arch.guest_supported_xcr0 | XSTATE_FP; | |
648 | if (xcr0 & ~valid_bits) | |
2acf923e | 649 | return 1; |
46c34cb0 | 650 | |
390bd528 LJ |
651 | if ((!(xcr0 & XSTATE_BNDREGS)) != (!(xcr0 & XSTATE_BNDCSR))) |
652 | return 1; | |
653 | ||
42bdf991 | 654 | kvm_put_guest_xcr0(vcpu); |
2acf923e | 655 | vcpu->arch.xcr0 = xcr0; |
56c103ec LJ |
656 | |
657 | if ((xcr0 ^ old_xcr0) & XSTATE_EXTEND_MASK) | |
658 | kvm_update_cpuid(vcpu); | |
2acf923e DC |
659 | return 0; |
660 | } | |
661 | ||
662 | int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) | |
663 | { | |
764bcbc5 Z |
664 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || |
665 | __kvm_set_xcr(vcpu, index, xcr)) { | |
2acf923e DC |
666 | kvm_inject_gp(vcpu, 0); |
667 | return 1; | |
668 | } | |
669 | return 0; | |
670 | } | |
671 | EXPORT_SYMBOL_GPL(kvm_set_xcr); | |
672 | ||
a83b29c6 | 673 | int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 674 | { |
fc78f519 | 675 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
c68b734f YW |
676 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | |
677 | X86_CR4_PAE | X86_CR4_SMEP; | |
0f12244f GN |
678 | if (cr4 & CR4_RESERVED_BITS) |
679 | return 1; | |
a03490ed | 680 | |
2acf923e DC |
681 | if (!guest_cpuid_has_xsave(vcpu) && (cr4 & X86_CR4_OSXSAVE)) |
682 | return 1; | |
683 | ||
c68b734f YW |
684 | if (!guest_cpuid_has_smep(vcpu) && (cr4 & X86_CR4_SMEP)) |
685 | return 1; | |
686 | ||
97ec8c06 FW |
687 | if (!guest_cpuid_has_smap(vcpu) && (cr4 & X86_CR4_SMAP)) |
688 | return 1; | |
689 | ||
afcbf13f | 690 | if (!guest_cpuid_has_fsgsbase(vcpu) && (cr4 & X86_CR4_FSGSBASE)) |
74dc2b4f YW |
691 | return 1; |
692 | ||
a03490ed | 693 | if (is_long_mode(vcpu)) { |
0f12244f GN |
694 | if (!(cr4 & X86_CR4_PAE)) |
695 | return 1; | |
a2edf57f AK |
696 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
697 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
9f8fe504 AK |
698 | && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
699 | kvm_read_cr3(vcpu))) | |
0f12244f GN |
700 | return 1; |
701 | ||
ad756a16 MJ |
702 | if ((cr4 & X86_CR4_PCIDE) && !(old_cr4 & X86_CR4_PCIDE)) { |
703 | if (!guest_cpuid_has_pcid(vcpu)) | |
704 | return 1; | |
705 | ||
706 | /* PCID can not be enabled when cr3[11:0]!=000H or EFER.LMA=0 */ | |
707 | if ((kvm_read_cr3(vcpu) & X86_CR3_PCID_MASK) || !is_long_mode(vcpu)) | |
708 | return 1; | |
709 | } | |
710 | ||
5e1746d6 | 711 | if (kvm_x86_ops->set_cr4(vcpu, cr4)) |
0f12244f | 712 | return 1; |
a03490ed | 713 | |
ad756a16 MJ |
714 | if (((cr4 ^ old_cr4) & pdptr_bits) || |
715 | (!(cr4 & X86_CR4_PCIDE) && (old_cr4 & X86_CR4_PCIDE))) | |
aad82703 | 716 | kvm_mmu_reset_context(vcpu); |
0f12244f | 717 | |
97ec8c06 FW |
718 | if ((cr4 ^ old_cr4) & X86_CR4_SMAP) |
719 | update_permission_bitmask(vcpu, vcpu->arch.walk_mmu, false); | |
720 | ||
2acf923e | 721 | if ((cr4 ^ old_cr4) & X86_CR4_OSXSAVE) |
00b27a3e | 722 | kvm_update_cpuid(vcpu); |
2acf923e | 723 | |
0f12244f GN |
724 | return 0; |
725 | } | |
2d3ad1f4 | 726 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 727 | |
2390218b | 728 | int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 729 | { |
9f8fe504 | 730 | if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) { |
0ba73cda | 731 | kvm_mmu_sync_roots(vcpu); |
d835dfec | 732 | kvm_mmu_flush_tlb(vcpu); |
0f12244f | 733 | return 0; |
d835dfec AK |
734 | } |
735 | ||
a03490ed | 736 | if (is_long_mode(vcpu)) { |
d9f89b88 JK |
737 | if (cr3 & CR3_L_MODE_RESERVED_BITS) |
738 | return 1; | |
739 | } else if (is_pae(vcpu) && is_paging(vcpu) && | |
740 | !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) | |
346874c9 | 741 | return 1; |
a03490ed | 742 | |
0f12244f | 743 | vcpu->arch.cr3 = cr3; |
aff48baa | 744 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
d8d173da | 745 | kvm_mmu_new_cr3(vcpu); |
0f12244f GN |
746 | return 0; |
747 | } | |
2d3ad1f4 | 748 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 749 | |
eea1cff9 | 750 | int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed | 751 | { |
0f12244f GN |
752 | if (cr8 & CR8_RESERVED_BITS) |
753 | return 1; | |
a03490ed CO |
754 | if (irqchip_in_kernel(vcpu->kvm)) |
755 | kvm_lapic_set_tpr(vcpu, cr8); | |
756 | else | |
ad312c7c | 757 | vcpu->arch.cr8 = cr8; |
0f12244f GN |
758 | return 0; |
759 | } | |
2d3ad1f4 | 760 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 761 | |
2d3ad1f4 | 762 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed CO |
763 | { |
764 | if (irqchip_in_kernel(vcpu->kvm)) | |
765 | return kvm_lapic_get_cr8(vcpu); | |
766 | else | |
ad312c7c | 767 | return vcpu->arch.cr8; |
a03490ed | 768 | } |
2d3ad1f4 | 769 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 770 | |
73aaf249 JK |
771 | static void kvm_update_dr6(struct kvm_vcpu *vcpu) |
772 | { | |
773 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
774 | kvm_x86_ops->set_dr6(vcpu, vcpu->arch.dr6); | |
775 | } | |
776 | ||
c8639010 JK |
777 | static void kvm_update_dr7(struct kvm_vcpu *vcpu) |
778 | { | |
779 | unsigned long dr7; | |
780 | ||
781 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) | |
782 | dr7 = vcpu->arch.guest_debug_dr7; | |
783 | else | |
784 | dr7 = vcpu->arch.dr7; | |
785 | kvm_x86_ops->set_dr7(vcpu, dr7); | |
360b948d PB |
786 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_BP_ENABLED; |
787 | if (dr7 & DR7_BP_EN_MASK) | |
788 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_BP_ENABLED; | |
c8639010 JK |
789 | } |
790 | ||
6f43ed01 NA |
791 | static u64 kvm_dr6_fixed(struct kvm_vcpu *vcpu) |
792 | { | |
793 | u64 fixed = DR6_FIXED_1; | |
794 | ||
795 | if (!guest_cpuid_has_rtm(vcpu)) | |
796 | fixed |= DR6_RTM; | |
797 | return fixed; | |
798 | } | |
799 | ||
338dbc97 | 800 | static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
020df079 GN |
801 | { |
802 | switch (dr) { | |
803 | case 0 ... 3: | |
804 | vcpu->arch.db[dr] = val; | |
805 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
806 | vcpu->arch.eff_db[dr] = val; | |
807 | break; | |
808 | case 4: | |
338dbc97 GN |
809 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
810 | return 1; /* #UD */ | |
020df079 GN |
811 | /* fall through */ |
812 | case 6: | |
338dbc97 GN |
813 | if (val & 0xffffffff00000000ULL) |
814 | return -1; /* #GP */ | |
6f43ed01 | 815 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | kvm_dr6_fixed(vcpu); |
73aaf249 | 816 | kvm_update_dr6(vcpu); |
020df079 GN |
817 | break; |
818 | case 5: | |
338dbc97 GN |
819 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
820 | return 1; /* #UD */ | |
020df079 GN |
821 | /* fall through */ |
822 | default: /* 7 */ | |
338dbc97 GN |
823 | if (val & 0xffffffff00000000ULL) |
824 | return -1; /* #GP */ | |
020df079 | 825 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; |
c8639010 | 826 | kvm_update_dr7(vcpu); |
020df079 GN |
827 | break; |
828 | } | |
829 | ||
830 | return 0; | |
831 | } | |
338dbc97 GN |
832 | |
833 | int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) | |
834 | { | |
835 | int res; | |
836 | ||
837 | res = __kvm_set_dr(vcpu, dr, val); | |
838 | if (res > 0) | |
839 | kvm_queue_exception(vcpu, UD_VECTOR); | |
840 | else if (res < 0) | |
841 | kvm_inject_gp(vcpu, 0); | |
842 | ||
843 | return res; | |
844 | } | |
020df079 GN |
845 | EXPORT_SYMBOL_GPL(kvm_set_dr); |
846 | ||
338dbc97 | 847 | static int _kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) |
020df079 GN |
848 | { |
849 | switch (dr) { | |
850 | case 0 ... 3: | |
851 | *val = vcpu->arch.db[dr]; | |
852 | break; | |
853 | case 4: | |
338dbc97 | 854 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
020df079 | 855 | return 1; |
020df079 GN |
856 | /* fall through */ |
857 | case 6: | |
73aaf249 JK |
858 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
859 | *val = vcpu->arch.dr6; | |
860 | else | |
861 | *val = kvm_x86_ops->get_dr6(vcpu); | |
020df079 GN |
862 | break; |
863 | case 5: | |
338dbc97 | 864 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
020df079 | 865 | return 1; |
020df079 GN |
866 | /* fall through */ |
867 | default: /* 7 */ | |
868 | *val = vcpu->arch.dr7; | |
869 | break; | |
870 | } | |
871 | ||
872 | return 0; | |
873 | } | |
338dbc97 GN |
874 | |
875 | int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) | |
876 | { | |
877 | if (_kvm_get_dr(vcpu, dr, val)) { | |
878 | kvm_queue_exception(vcpu, UD_VECTOR); | |
879 | return 1; | |
880 | } | |
881 | return 0; | |
882 | } | |
020df079 GN |
883 | EXPORT_SYMBOL_GPL(kvm_get_dr); |
884 | ||
022cd0e8 AK |
885 | bool kvm_rdpmc(struct kvm_vcpu *vcpu) |
886 | { | |
887 | u32 ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
888 | u64 data; | |
889 | int err; | |
890 | ||
891 | err = kvm_pmu_read_pmc(vcpu, ecx, &data); | |
892 | if (err) | |
893 | return err; | |
894 | kvm_register_write(vcpu, VCPU_REGS_RAX, (u32)data); | |
895 | kvm_register_write(vcpu, VCPU_REGS_RDX, data >> 32); | |
896 | return err; | |
897 | } | |
898 | EXPORT_SYMBOL_GPL(kvm_rdpmc); | |
899 | ||
043405e1 CO |
900 | /* |
901 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
902 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
903 | * | |
904 | * This list is modified at module load time to reflect the | |
e3267cbb GC |
905 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
906 | * kvm-specific. Those are put in the beginning of the list. | |
043405e1 | 907 | */ |
e3267cbb | 908 | |
e984097b | 909 | #define KVM_SAVE_MSRS_BEGIN 12 |
043405e1 | 910 | static u32 msrs_to_save[] = { |
e3267cbb | 911 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
11c6bffa | 912 | MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW, |
55cd8e5a | 913 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, |
e984097b | 914 | HV_X64_MSR_TIME_REF_COUNT, HV_X64_MSR_REFERENCE_TSC, |
c9aaa895 | 915 | HV_X64_MSR_APIC_ASSIST_PAGE, MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME, |
ae7a2a3f | 916 | MSR_KVM_PV_EOI_EN, |
043405e1 | 917 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, |
8c06585d | 918 | MSR_STAR, |
043405e1 CO |
919 | #ifdef CONFIG_X86_64 |
920 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
921 | #endif | |
b3897a49 | 922 | MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA, |
0dd376e7 | 923 | MSR_IA32_FEATURE_CONTROL, MSR_IA32_BNDCFGS |
043405e1 CO |
924 | }; |
925 | ||
926 | static unsigned num_msrs_to_save; | |
927 | ||
f1d24831 | 928 | static const u32 emulated_msrs[] = { |
ba904635 | 929 | MSR_IA32_TSC_ADJUST, |
a3e06bbe | 930 | MSR_IA32_TSCDEADLINE, |
043405e1 | 931 | MSR_IA32_MISC_ENABLE, |
908e75f3 AK |
932 | MSR_IA32_MCG_STATUS, |
933 | MSR_IA32_MCG_CTL, | |
043405e1 CO |
934 | }; |
935 | ||
384bb783 | 936 | bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer) |
15c4a640 | 937 | { |
b69e8cae | 938 | if (efer & efer_reserved_bits) |
384bb783 | 939 | return false; |
15c4a640 | 940 | |
1b2fd70c AG |
941 | if (efer & EFER_FFXSR) { |
942 | struct kvm_cpuid_entry2 *feat; | |
943 | ||
944 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae | 945 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) |
384bb783 | 946 | return false; |
1b2fd70c AG |
947 | } |
948 | ||
d8017474 AG |
949 | if (efer & EFER_SVME) { |
950 | struct kvm_cpuid_entry2 *feat; | |
951 | ||
952 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae | 953 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) |
384bb783 | 954 | return false; |
d8017474 AG |
955 | } |
956 | ||
384bb783 JK |
957 | return true; |
958 | } | |
959 | EXPORT_SYMBOL_GPL(kvm_valid_efer); | |
960 | ||
961 | static int set_efer(struct kvm_vcpu *vcpu, u64 efer) | |
962 | { | |
963 | u64 old_efer = vcpu->arch.efer; | |
964 | ||
965 | if (!kvm_valid_efer(vcpu, efer)) | |
966 | return 1; | |
967 | ||
968 | if (is_paging(vcpu) | |
969 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) | |
970 | return 1; | |
971 | ||
15c4a640 | 972 | efer &= ~EFER_LMA; |
f6801dff | 973 | efer |= vcpu->arch.efer & EFER_LMA; |
15c4a640 | 974 | |
a3d204e2 SY |
975 | kvm_x86_ops->set_efer(vcpu, efer); |
976 | ||
aad82703 SY |
977 | /* Update reserved bits */ |
978 | if ((efer ^ old_efer) & EFER_NX) | |
979 | kvm_mmu_reset_context(vcpu); | |
980 | ||
b69e8cae | 981 | return 0; |
15c4a640 CO |
982 | } |
983 | ||
f2b4b7dd JR |
984 | void kvm_enable_efer_bits(u64 mask) |
985 | { | |
986 | efer_reserved_bits &= ~mask; | |
987 | } | |
988 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
989 | ||
990 | ||
15c4a640 CO |
991 | /* |
992 | * Writes msr value into into the appropriate "register". | |
993 | * Returns 0 on success, non-0 otherwise. | |
994 | * Assumes vcpu_load() was already called. | |
995 | */ | |
8fe8ab46 | 996 | int kvm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
15c4a640 | 997 | { |
8fe8ab46 | 998 | return kvm_x86_ops->set_msr(vcpu, msr); |
15c4a640 CO |
999 | } |
1000 | ||
313a3dc7 CO |
1001 | /* |
1002 | * Adapt set_msr() to msr_io()'s calling convention | |
1003 | */ | |
1004 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
1005 | { | |
8fe8ab46 WA |
1006 | struct msr_data msr; |
1007 | ||
1008 | msr.data = *data; | |
1009 | msr.index = index; | |
1010 | msr.host_initiated = true; | |
1011 | return kvm_set_msr(vcpu, &msr); | |
313a3dc7 CO |
1012 | } |
1013 | ||
16e8d74d MT |
1014 | #ifdef CONFIG_X86_64 |
1015 | struct pvclock_gtod_data { | |
1016 | seqcount_t seq; | |
1017 | ||
1018 | struct { /* extract of a clocksource struct */ | |
1019 | int vclock_mode; | |
1020 | cycle_t cycle_last; | |
1021 | cycle_t mask; | |
1022 | u32 mult; | |
1023 | u32 shift; | |
1024 | } clock; | |
1025 | ||
cbcf2dd3 TG |
1026 | u64 boot_ns; |
1027 | u64 nsec_base; | |
16e8d74d MT |
1028 | }; |
1029 | ||
1030 | static struct pvclock_gtod_data pvclock_gtod_data; | |
1031 | ||
1032 | static void update_pvclock_gtod(struct timekeeper *tk) | |
1033 | { | |
1034 | struct pvclock_gtod_data *vdata = &pvclock_gtod_data; | |
cbcf2dd3 TG |
1035 | u64 boot_ns; |
1036 | ||
d28ede83 | 1037 | boot_ns = ktime_to_ns(ktime_add(tk->tkr.base_mono, tk->offs_boot)); |
16e8d74d MT |
1038 | |
1039 | write_seqcount_begin(&vdata->seq); | |
1040 | ||
1041 | /* copy pvclock gtod data */ | |
d28ede83 TG |
1042 | vdata->clock.vclock_mode = tk->tkr.clock->archdata.vclock_mode; |
1043 | vdata->clock.cycle_last = tk->tkr.cycle_last; | |
1044 | vdata->clock.mask = tk->tkr.mask; | |
1045 | vdata->clock.mult = tk->tkr.mult; | |
1046 | vdata->clock.shift = tk->tkr.shift; | |
16e8d74d | 1047 | |
cbcf2dd3 | 1048 | vdata->boot_ns = boot_ns; |
d28ede83 | 1049 | vdata->nsec_base = tk->tkr.xtime_nsec; |
16e8d74d MT |
1050 | |
1051 | write_seqcount_end(&vdata->seq); | |
1052 | } | |
1053 | #endif | |
1054 | ||
1055 | ||
18068523 GOC |
1056 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
1057 | { | |
9ed3c444 AK |
1058 | int version; |
1059 | int r; | |
50d0a0f9 | 1060 | struct pvclock_wall_clock wc; |
923de3cf | 1061 | struct timespec boot; |
18068523 GOC |
1062 | |
1063 | if (!wall_clock) | |
1064 | return; | |
1065 | ||
9ed3c444 AK |
1066 | r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version)); |
1067 | if (r) | |
1068 | return; | |
1069 | ||
1070 | if (version & 1) | |
1071 | ++version; /* first time write, random junk */ | |
1072 | ||
1073 | ++version; | |
18068523 | 1074 | |
18068523 GOC |
1075 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
1076 | ||
50d0a0f9 GH |
1077 | /* |
1078 | * The guest calculates current wall clock time by adding | |
34c238a1 | 1079 | * system time (updated by kvm_guest_time_update below) to the |
50d0a0f9 GH |
1080 | * wall clock specified here. guest system time equals host |
1081 | * system time for us, thus we must fill in host boot time here. | |
1082 | */ | |
923de3cf | 1083 | getboottime(&boot); |
50d0a0f9 | 1084 | |
4b648665 BR |
1085 | if (kvm->arch.kvmclock_offset) { |
1086 | struct timespec ts = ns_to_timespec(kvm->arch.kvmclock_offset); | |
1087 | boot = timespec_sub(boot, ts); | |
1088 | } | |
50d0a0f9 GH |
1089 | wc.sec = boot.tv_sec; |
1090 | wc.nsec = boot.tv_nsec; | |
1091 | wc.version = version; | |
18068523 GOC |
1092 | |
1093 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
1094 | ||
1095 | version++; | |
1096 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
1097 | } |
1098 | ||
50d0a0f9 GH |
1099 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
1100 | { | |
1101 | uint32_t quotient, remainder; | |
1102 | ||
1103 | /* Don't try to replace with do_div(), this one calculates | |
1104 | * "(dividend << 32) / divisor" */ | |
1105 | __asm__ ( "divl %4" | |
1106 | : "=a" (quotient), "=d" (remainder) | |
1107 | : "0" (0), "1" (dividend), "r" (divisor) ); | |
1108 | return quotient; | |
1109 | } | |
1110 | ||
5f4e3f88 ZA |
1111 | static void kvm_get_time_scale(uint32_t scaled_khz, uint32_t base_khz, |
1112 | s8 *pshift, u32 *pmultiplier) | |
50d0a0f9 | 1113 | { |
5f4e3f88 | 1114 | uint64_t scaled64; |
50d0a0f9 GH |
1115 | int32_t shift = 0; |
1116 | uint64_t tps64; | |
1117 | uint32_t tps32; | |
1118 | ||
5f4e3f88 ZA |
1119 | tps64 = base_khz * 1000LL; |
1120 | scaled64 = scaled_khz * 1000LL; | |
50933623 | 1121 | while (tps64 > scaled64*2 || tps64 & 0xffffffff00000000ULL) { |
50d0a0f9 GH |
1122 | tps64 >>= 1; |
1123 | shift--; | |
1124 | } | |
1125 | ||
1126 | tps32 = (uint32_t)tps64; | |
50933623 JK |
1127 | while (tps32 <= scaled64 || scaled64 & 0xffffffff00000000ULL) { |
1128 | if (scaled64 & 0xffffffff00000000ULL || tps32 & 0x80000000) | |
5f4e3f88 ZA |
1129 | scaled64 >>= 1; |
1130 | else | |
1131 | tps32 <<= 1; | |
50d0a0f9 GH |
1132 | shift++; |
1133 | } | |
1134 | ||
5f4e3f88 ZA |
1135 | *pshift = shift; |
1136 | *pmultiplier = div_frac(scaled64, tps32); | |
50d0a0f9 | 1137 | |
5f4e3f88 ZA |
1138 | pr_debug("%s: base_khz %u => %u, shift %d, mul %u\n", |
1139 | __func__, base_khz, scaled_khz, shift, *pmultiplier); | |
50d0a0f9 GH |
1140 | } |
1141 | ||
759379dd ZA |
1142 | static inline u64 get_kernel_ns(void) |
1143 | { | |
bb0b5812 | 1144 | return ktime_get_boot_ns(); |
50d0a0f9 GH |
1145 | } |
1146 | ||
d828199e | 1147 | #ifdef CONFIG_X86_64 |
16e8d74d | 1148 | static atomic_t kvm_guest_has_master_clock = ATOMIC_INIT(0); |
d828199e | 1149 | #endif |
16e8d74d | 1150 | |
c8076604 | 1151 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
c285545f | 1152 | unsigned long max_tsc_khz; |
c8076604 | 1153 | |
cc578287 | 1154 | static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec) |
8cfdc000 | 1155 | { |
cc578287 ZA |
1156 | return pvclock_scale_delta(nsec, vcpu->arch.virtual_tsc_mult, |
1157 | vcpu->arch.virtual_tsc_shift); | |
8cfdc000 ZA |
1158 | } |
1159 | ||
cc578287 | 1160 | static u32 adjust_tsc_khz(u32 khz, s32 ppm) |
1e993611 | 1161 | { |
cc578287 ZA |
1162 | u64 v = (u64)khz * (1000000 + ppm); |
1163 | do_div(v, 1000000); | |
1164 | return v; | |
1e993611 JR |
1165 | } |
1166 | ||
cc578287 | 1167 | static void kvm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 this_tsc_khz) |
759379dd | 1168 | { |
cc578287 ZA |
1169 | u32 thresh_lo, thresh_hi; |
1170 | int use_scaling = 0; | |
217fc9cf | 1171 | |
03ba32ca MT |
1172 | /* tsc_khz can be zero if TSC calibration fails */ |
1173 | if (this_tsc_khz == 0) | |
1174 | return; | |
1175 | ||
c285545f ZA |
1176 | /* Compute a scale to convert nanoseconds in TSC cycles */ |
1177 | kvm_get_time_scale(this_tsc_khz, NSEC_PER_SEC / 1000, | |
cc578287 ZA |
1178 | &vcpu->arch.virtual_tsc_shift, |
1179 | &vcpu->arch.virtual_tsc_mult); | |
1180 | vcpu->arch.virtual_tsc_khz = this_tsc_khz; | |
1181 | ||
1182 | /* | |
1183 | * Compute the variation in TSC rate which is acceptable | |
1184 | * within the range of tolerance and decide if the | |
1185 | * rate being applied is within that bounds of the hardware | |
1186 | * rate. If so, no scaling or compensation need be done. | |
1187 | */ | |
1188 | thresh_lo = adjust_tsc_khz(tsc_khz, -tsc_tolerance_ppm); | |
1189 | thresh_hi = adjust_tsc_khz(tsc_khz, tsc_tolerance_ppm); | |
1190 | if (this_tsc_khz < thresh_lo || this_tsc_khz > thresh_hi) { | |
1191 | pr_debug("kvm: requested TSC rate %u falls outside tolerance [%u,%u]\n", this_tsc_khz, thresh_lo, thresh_hi); | |
1192 | use_scaling = 1; | |
1193 | } | |
1194 | kvm_x86_ops->set_tsc_khz(vcpu, this_tsc_khz, use_scaling); | |
c285545f ZA |
1195 | } |
1196 | ||
1197 | static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns) | |
1198 | { | |
e26101b1 | 1199 | u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.this_tsc_nsec, |
cc578287 ZA |
1200 | vcpu->arch.virtual_tsc_mult, |
1201 | vcpu->arch.virtual_tsc_shift); | |
e26101b1 | 1202 | tsc += vcpu->arch.this_tsc_write; |
c285545f ZA |
1203 | return tsc; |
1204 | } | |
1205 | ||
b48aa97e MT |
1206 | void kvm_track_tsc_matching(struct kvm_vcpu *vcpu) |
1207 | { | |
1208 | #ifdef CONFIG_X86_64 | |
1209 | bool vcpus_matched; | |
1210 | bool do_request = false; | |
1211 | struct kvm_arch *ka = &vcpu->kvm->arch; | |
1212 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1213 | ||
1214 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1215 | atomic_read(&vcpu->kvm->online_vcpus)); | |
1216 | ||
1217 | if (vcpus_matched && gtod->clock.vclock_mode == VCLOCK_TSC) | |
1218 | if (!ka->use_master_clock) | |
1219 | do_request = 1; | |
1220 | ||
1221 | if (!vcpus_matched && ka->use_master_clock) | |
1222 | do_request = 1; | |
1223 | ||
1224 | if (do_request) | |
1225 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); | |
1226 | ||
1227 | trace_kvm_track_tsc(vcpu->vcpu_id, ka->nr_vcpus_matched_tsc, | |
1228 | atomic_read(&vcpu->kvm->online_vcpus), | |
1229 | ka->use_master_clock, gtod->clock.vclock_mode); | |
1230 | #endif | |
1231 | } | |
1232 | ||
ba904635 WA |
1233 | static void update_ia32_tsc_adjust_msr(struct kvm_vcpu *vcpu, s64 offset) |
1234 | { | |
1235 | u64 curr_offset = kvm_x86_ops->read_tsc_offset(vcpu); | |
1236 | vcpu->arch.ia32_tsc_adjust_msr += offset - curr_offset; | |
1237 | } | |
1238 | ||
8fe8ab46 | 1239 | void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr) |
99e3e30a ZA |
1240 | { |
1241 | struct kvm *kvm = vcpu->kvm; | |
f38e098f | 1242 | u64 offset, ns, elapsed; |
99e3e30a | 1243 | unsigned long flags; |
02626b6a | 1244 | s64 usdiff; |
b48aa97e | 1245 | bool matched; |
0d3da0d2 | 1246 | bool already_matched; |
8fe8ab46 | 1247 | u64 data = msr->data; |
99e3e30a | 1248 | |
038f8c11 | 1249 | raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags); |
857e4099 | 1250 | offset = kvm_x86_ops->compute_tsc_offset(vcpu, data); |
759379dd | 1251 | ns = get_kernel_ns(); |
f38e098f | 1252 | elapsed = ns - kvm->arch.last_tsc_nsec; |
5d3cb0f6 | 1253 | |
03ba32ca | 1254 | if (vcpu->arch.virtual_tsc_khz) { |
8915aa27 MT |
1255 | int faulted = 0; |
1256 | ||
03ba32ca MT |
1257 | /* n.b - signed multiplication and division required */ |
1258 | usdiff = data - kvm->arch.last_tsc_write; | |
5d3cb0f6 | 1259 | #ifdef CONFIG_X86_64 |
03ba32ca | 1260 | usdiff = (usdiff * 1000) / vcpu->arch.virtual_tsc_khz; |
5d3cb0f6 | 1261 | #else |
03ba32ca | 1262 | /* do_div() only does unsigned */ |
8915aa27 MT |
1263 | asm("1: idivl %[divisor]\n" |
1264 | "2: xor %%edx, %%edx\n" | |
1265 | " movl $0, %[faulted]\n" | |
1266 | "3:\n" | |
1267 | ".section .fixup,\"ax\"\n" | |
1268 | "4: movl $1, %[faulted]\n" | |
1269 | " jmp 3b\n" | |
1270 | ".previous\n" | |
1271 | ||
1272 | _ASM_EXTABLE(1b, 4b) | |
1273 | ||
1274 | : "=A"(usdiff), [faulted] "=r" (faulted) | |
1275 | : "A"(usdiff * 1000), [divisor] "rm"(vcpu->arch.virtual_tsc_khz)); | |
1276 | ||
5d3cb0f6 | 1277 | #endif |
03ba32ca MT |
1278 | do_div(elapsed, 1000); |
1279 | usdiff -= elapsed; | |
1280 | if (usdiff < 0) | |
1281 | usdiff = -usdiff; | |
8915aa27 MT |
1282 | |
1283 | /* idivl overflow => difference is larger than USEC_PER_SEC */ | |
1284 | if (faulted) | |
1285 | usdiff = USEC_PER_SEC; | |
03ba32ca MT |
1286 | } else |
1287 | usdiff = USEC_PER_SEC; /* disable TSC match window below */ | |
f38e098f ZA |
1288 | |
1289 | /* | |
5d3cb0f6 ZA |
1290 | * Special case: TSC write with a small delta (1 second) of virtual |
1291 | * cycle time against real time is interpreted as an attempt to | |
1292 | * synchronize the CPU. | |
1293 | * | |
1294 | * For a reliable TSC, we can match TSC offsets, and for an unstable | |
1295 | * TSC, we add elapsed time in this computation. We could let the | |
1296 | * compensation code attempt to catch up if we fall behind, but | |
1297 | * it's better to try to match offsets from the beginning. | |
1298 | */ | |
02626b6a | 1299 | if (usdiff < USEC_PER_SEC && |
5d3cb0f6 | 1300 | vcpu->arch.virtual_tsc_khz == kvm->arch.last_tsc_khz) { |
f38e098f | 1301 | if (!check_tsc_unstable()) { |
e26101b1 | 1302 | offset = kvm->arch.cur_tsc_offset; |
f38e098f ZA |
1303 | pr_debug("kvm: matched tsc offset for %llu\n", data); |
1304 | } else { | |
857e4099 | 1305 | u64 delta = nsec_to_cycles(vcpu, elapsed); |
5d3cb0f6 ZA |
1306 | data += delta; |
1307 | offset = kvm_x86_ops->compute_tsc_offset(vcpu, data); | |
759379dd | 1308 | pr_debug("kvm: adjusted tsc offset by %llu\n", delta); |
f38e098f | 1309 | } |
b48aa97e | 1310 | matched = true; |
0d3da0d2 | 1311 | already_matched = (vcpu->arch.this_tsc_generation == kvm->arch.cur_tsc_generation); |
e26101b1 ZA |
1312 | } else { |
1313 | /* | |
1314 | * We split periods of matched TSC writes into generations. | |
1315 | * For each generation, we track the original measured | |
1316 | * nanosecond time, offset, and write, so if TSCs are in | |
1317 | * sync, we can match exact offset, and if not, we can match | |
4a969980 | 1318 | * exact software computation in compute_guest_tsc() |
e26101b1 ZA |
1319 | * |
1320 | * These values are tracked in kvm->arch.cur_xxx variables. | |
1321 | */ | |
1322 | kvm->arch.cur_tsc_generation++; | |
1323 | kvm->arch.cur_tsc_nsec = ns; | |
1324 | kvm->arch.cur_tsc_write = data; | |
1325 | kvm->arch.cur_tsc_offset = offset; | |
b48aa97e | 1326 | matched = false; |
0d3da0d2 | 1327 | pr_debug("kvm: new tsc generation %llu, clock %llu\n", |
e26101b1 | 1328 | kvm->arch.cur_tsc_generation, data); |
f38e098f | 1329 | } |
e26101b1 ZA |
1330 | |
1331 | /* | |
1332 | * We also track th most recent recorded KHZ, write and time to | |
1333 | * allow the matching interval to be extended at each write. | |
1334 | */ | |
f38e098f ZA |
1335 | kvm->arch.last_tsc_nsec = ns; |
1336 | kvm->arch.last_tsc_write = data; | |
5d3cb0f6 | 1337 | kvm->arch.last_tsc_khz = vcpu->arch.virtual_tsc_khz; |
99e3e30a | 1338 | |
b183aa58 | 1339 | vcpu->arch.last_guest_tsc = data; |
e26101b1 ZA |
1340 | |
1341 | /* Keep track of which generation this VCPU has synchronized to */ | |
1342 | vcpu->arch.this_tsc_generation = kvm->arch.cur_tsc_generation; | |
1343 | vcpu->arch.this_tsc_nsec = kvm->arch.cur_tsc_nsec; | |
1344 | vcpu->arch.this_tsc_write = kvm->arch.cur_tsc_write; | |
1345 | ||
ba904635 WA |
1346 | if (guest_cpuid_has_tsc_adjust(vcpu) && !msr->host_initiated) |
1347 | update_ia32_tsc_adjust_msr(vcpu, offset); | |
e26101b1 ZA |
1348 | kvm_x86_ops->write_tsc_offset(vcpu, offset); |
1349 | raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags); | |
b48aa97e MT |
1350 | |
1351 | spin_lock(&kvm->arch.pvclock_gtod_sync_lock); | |
0d3da0d2 | 1352 | if (!matched) { |
b48aa97e | 1353 | kvm->arch.nr_vcpus_matched_tsc = 0; |
0d3da0d2 TG |
1354 | } else if (!already_matched) { |
1355 | kvm->arch.nr_vcpus_matched_tsc++; | |
1356 | } | |
b48aa97e MT |
1357 | |
1358 | kvm_track_tsc_matching(vcpu); | |
1359 | spin_unlock(&kvm->arch.pvclock_gtod_sync_lock); | |
99e3e30a | 1360 | } |
e26101b1 | 1361 | |
99e3e30a ZA |
1362 | EXPORT_SYMBOL_GPL(kvm_write_tsc); |
1363 | ||
d828199e MT |
1364 | #ifdef CONFIG_X86_64 |
1365 | ||
1366 | static cycle_t read_tsc(void) | |
1367 | { | |
1368 | cycle_t ret; | |
1369 | u64 last; | |
1370 | ||
1371 | /* | |
1372 | * Empirically, a fence (of type that depends on the CPU) | |
1373 | * before rdtsc is enough to ensure that rdtsc is ordered | |
1374 | * with respect to loads. The various CPU manuals are unclear | |
1375 | * as to whether rdtsc can be reordered with later loads, | |
1376 | * but no one has ever seen it happen. | |
1377 | */ | |
1378 | rdtsc_barrier(); | |
1379 | ret = (cycle_t)vget_cycles(); | |
1380 | ||
1381 | last = pvclock_gtod_data.clock.cycle_last; | |
1382 | ||
1383 | if (likely(ret >= last)) | |
1384 | return ret; | |
1385 | ||
1386 | /* | |
1387 | * GCC likes to generate cmov here, but this branch is extremely | |
1388 | * predictable (it's just a funciton of time and the likely is | |
1389 | * very likely) and there's a data dependence, so force GCC | |
1390 | * to generate a branch instead. I don't barrier() because | |
1391 | * we don't actually need a barrier, and if this function | |
1392 | * ever gets inlined it will generate worse code. | |
1393 | */ | |
1394 | asm volatile (""); | |
1395 | return last; | |
1396 | } | |
1397 | ||
1398 | static inline u64 vgettsc(cycle_t *cycle_now) | |
1399 | { | |
1400 | long v; | |
1401 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1402 | ||
1403 | *cycle_now = read_tsc(); | |
1404 | ||
1405 | v = (*cycle_now - gtod->clock.cycle_last) & gtod->clock.mask; | |
1406 | return v * gtod->clock.mult; | |
1407 | } | |
1408 | ||
cbcf2dd3 | 1409 | static int do_monotonic_boot(s64 *t, cycle_t *cycle_now) |
d828199e | 1410 | { |
cbcf2dd3 | 1411 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; |
d828199e | 1412 | unsigned long seq; |
d828199e | 1413 | int mode; |
cbcf2dd3 | 1414 | u64 ns; |
d828199e | 1415 | |
d828199e MT |
1416 | do { |
1417 | seq = read_seqcount_begin(>od->seq); | |
1418 | mode = gtod->clock.vclock_mode; | |
cbcf2dd3 | 1419 | ns = gtod->nsec_base; |
d828199e MT |
1420 | ns += vgettsc(cycle_now); |
1421 | ns >>= gtod->clock.shift; | |
cbcf2dd3 | 1422 | ns += gtod->boot_ns; |
d828199e | 1423 | } while (unlikely(read_seqcount_retry(>od->seq, seq))); |
cbcf2dd3 | 1424 | *t = ns; |
d828199e MT |
1425 | |
1426 | return mode; | |
1427 | } | |
1428 | ||
1429 | /* returns true if host is using tsc clocksource */ | |
1430 | static bool kvm_get_time_and_clockread(s64 *kernel_ns, cycle_t *cycle_now) | |
1431 | { | |
d828199e MT |
1432 | /* checked again under seqlock below */ |
1433 | if (pvclock_gtod_data.clock.vclock_mode != VCLOCK_TSC) | |
1434 | return false; | |
1435 | ||
cbcf2dd3 | 1436 | return do_monotonic_boot(kernel_ns, cycle_now) == VCLOCK_TSC; |
d828199e MT |
1437 | } |
1438 | #endif | |
1439 | ||
1440 | /* | |
1441 | * | |
b48aa97e MT |
1442 | * Assuming a stable TSC across physical CPUS, and a stable TSC |
1443 | * across virtual CPUs, the following condition is possible. | |
1444 | * Each numbered line represents an event visible to both | |
d828199e MT |
1445 | * CPUs at the next numbered event. |
1446 | * | |
1447 | * "timespecX" represents host monotonic time. "tscX" represents | |
1448 | * RDTSC value. | |
1449 | * | |
1450 | * VCPU0 on CPU0 | VCPU1 on CPU1 | |
1451 | * | |
1452 | * 1. read timespec0,tsc0 | |
1453 | * 2. | timespec1 = timespec0 + N | |
1454 | * | tsc1 = tsc0 + M | |
1455 | * 3. transition to guest | transition to guest | |
1456 | * 4. ret0 = timespec0 + (rdtsc - tsc0) | | |
1457 | * 5. | ret1 = timespec1 + (rdtsc - tsc1) | |
1458 | * | ret1 = timespec0 + N + (rdtsc - (tsc0 + M)) | |
1459 | * | |
1460 | * Since ret0 update is visible to VCPU1 at time 5, to obey monotonicity: | |
1461 | * | |
1462 | * - ret0 < ret1 | |
1463 | * - timespec0 + (rdtsc - tsc0) < timespec0 + N + (rdtsc - (tsc0 + M)) | |
1464 | * ... | |
1465 | * - 0 < N - M => M < N | |
1466 | * | |
1467 | * That is, when timespec0 != timespec1, M < N. Unfortunately that is not | |
1468 | * always the case (the difference between two distinct xtime instances | |
1469 | * might be smaller then the difference between corresponding TSC reads, | |
1470 | * when updating guest vcpus pvclock areas). | |
1471 | * | |
1472 | * To avoid that problem, do not allow visibility of distinct | |
1473 | * system_timestamp/tsc_timestamp values simultaneously: use a master | |
1474 | * copy of host monotonic time values. Update that master copy | |
1475 | * in lockstep. | |
1476 | * | |
b48aa97e | 1477 | * Rely on synchronization of host TSCs and guest TSCs for monotonicity. |
d828199e MT |
1478 | * |
1479 | */ | |
1480 | ||
1481 | static void pvclock_update_vm_gtod_copy(struct kvm *kvm) | |
1482 | { | |
1483 | #ifdef CONFIG_X86_64 | |
1484 | struct kvm_arch *ka = &kvm->arch; | |
1485 | int vclock_mode; | |
b48aa97e MT |
1486 | bool host_tsc_clocksource, vcpus_matched; |
1487 | ||
1488 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1489 | atomic_read(&kvm->online_vcpus)); | |
d828199e MT |
1490 | |
1491 | /* | |
1492 | * If the host uses TSC clock, then passthrough TSC as stable | |
1493 | * to the guest. | |
1494 | */ | |
b48aa97e | 1495 | host_tsc_clocksource = kvm_get_time_and_clockread( |
d828199e MT |
1496 | &ka->master_kernel_ns, |
1497 | &ka->master_cycle_now); | |
1498 | ||
16a96021 MT |
1499 | ka->use_master_clock = host_tsc_clocksource && vcpus_matched |
1500 | && !backwards_tsc_observed; | |
b48aa97e | 1501 | |
d828199e MT |
1502 | if (ka->use_master_clock) |
1503 | atomic_set(&kvm_guest_has_master_clock, 1); | |
1504 | ||
1505 | vclock_mode = pvclock_gtod_data.clock.vclock_mode; | |
b48aa97e MT |
1506 | trace_kvm_update_master_clock(ka->use_master_clock, vclock_mode, |
1507 | vcpus_matched); | |
d828199e MT |
1508 | #endif |
1509 | } | |
1510 | ||
2e762ff7 MT |
1511 | static void kvm_gen_update_masterclock(struct kvm *kvm) |
1512 | { | |
1513 | #ifdef CONFIG_X86_64 | |
1514 | int i; | |
1515 | struct kvm_vcpu *vcpu; | |
1516 | struct kvm_arch *ka = &kvm->arch; | |
1517 | ||
1518 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
1519 | kvm_make_mclock_inprogress_request(kvm); | |
1520 | /* no guest entries from this point */ | |
1521 | pvclock_update_vm_gtod_copy(kvm); | |
1522 | ||
1523 | kvm_for_each_vcpu(i, vcpu, kvm) | |
1524 | set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); | |
1525 | ||
1526 | /* guest entries allowed */ | |
1527 | kvm_for_each_vcpu(i, vcpu, kvm) | |
1528 | clear_bit(KVM_REQ_MCLOCK_INPROGRESS, &vcpu->requests); | |
1529 | ||
1530 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
1531 | #endif | |
1532 | } | |
1533 | ||
34c238a1 | 1534 | static int kvm_guest_time_update(struct kvm_vcpu *v) |
18068523 | 1535 | { |
d828199e | 1536 | unsigned long flags, this_tsc_khz; |
18068523 | 1537 | struct kvm_vcpu_arch *vcpu = &v->arch; |
d828199e | 1538 | struct kvm_arch *ka = &v->kvm->arch; |
f25e656d | 1539 | s64 kernel_ns; |
d828199e | 1540 | u64 tsc_timestamp, host_tsc; |
0b79459b | 1541 | struct pvclock_vcpu_time_info guest_hv_clock; |
51d59c6b | 1542 | u8 pvclock_flags; |
d828199e MT |
1543 | bool use_master_clock; |
1544 | ||
1545 | kernel_ns = 0; | |
1546 | host_tsc = 0; | |
18068523 | 1547 | |
d828199e MT |
1548 | /* |
1549 | * If the host uses TSC clock, then passthrough TSC as stable | |
1550 | * to the guest. | |
1551 | */ | |
1552 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
1553 | use_master_clock = ka->use_master_clock; | |
1554 | if (use_master_clock) { | |
1555 | host_tsc = ka->master_cycle_now; | |
1556 | kernel_ns = ka->master_kernel_ns; | |
1557 | } | |
1558 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
c09664bb MT |
1559 | |
1560 | /* Keep irq disabled to prevent changes to the clock */ | |
1561 | local_irq_save(flags); | |
1562 | this_tsc_khz = __get_cpu_var(cpu_tsc_khz); | |
1563 | if (unlikely(this_tsc_khz == 0)) { | |
1564 | local_irq_restore(flags); | |
1565 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); | |
1566 | return 1; | |
1567 | } | |
d828199e MT |
1568 | if (!use_master_clock) { |
1569 | host_tsc = native_read_tsc(); | |
1570 | kernel_ns = get_kernel_ns(); | |
1571 | } | |
1572 | ||
1573 | tsc_timestamp = kvm_x86_ops->read_l1_tsc(v, host_tsc); | |
1574 | ||
c285545f ZA |
1575 | /* |
1576 | * We may have to catch up the TSC to match elapsed wall clock | |
1577 | * time for two reasons, even if kvmclock is used. | |
1578 | * 1) CPU could have been running below the maximum TSC rate | |
1579 | * 2) Broken TSC compensation resets the base at each VCPU | |
1580 | * entry to avoid unknown leaps of TSC even when running | |
1581 | * again on the same CPU. This may cause apparent elapsed | |
1582 | * time to disappear, and the guest to stand still or run | |
1583 | * very slowly. | |
1584 | */ | |
1585 | if (vcpu->tsc_catchup) { | |
1586 | u64 tsc = compute_guest_tsc(v, kernel_ns); | |
1587 | if (tsc > tsc_timestamp) { | |
f1e2b260 | 1588 | adjust_tsc_offset_guest(v, tsc - tsc_timestamp); |
c285545f ZA |
1589 | tsc_timestamp = tsc; |
1590 | } | |
50d0a0f9 GH |
1591 | } |
1592 | ||
18068523 GOC |
1593 | local_irq_restore(flags); |
1594 | ||
0b79459b | 1595 | if (!vcpu->pv_time_enabled) |
c285545f | 1596 | return 0; |
18068523 | 1597 | |
e48672fa | 1598 | if (unlikely(vcpu->hw_tsc_khz != this_tsc_khz)) { |
5f4e3f88 ZA |
1599 | kvm_get_time_scale(NSEC_PER_SEC / 1000, this_tsc_khz, |
1600 | &vcpu->hv_clock.tsc_shift, | |
1601 | &vcpu->hv_clock.tsc_to_system_mul); | |
e48672fa | 1602 | vcpu->hw_tsc_khz = this_tsc_khz; |
8cfdc000 ZA |
1603 | } |
1604 | ||
1605 | /* With all the info we got, fill in the values */ | |
1d5f066e | 1606 | vcpu->hv_clock.tsc_timestamp = tsc_timestamp; |
759379dd | 1607 | vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset; |
28e4639a | 1608 | vcpu->last_guest_tsc = tsc_timestamp; |
51d59c6b | 1609 | |
18068523 GOC |
1610 | /* |
1611 | * The interface expects us to write an even number signaling that the | |
1612 | * update is finished. Since the guest won't see the intermediate | |
50d0a0f9 | 1613 | * state, we just increase by 2 at the end. |
18068523 | 1614 | */ |
50d0a0f9 | 1615 | vcpu->hv_clock.version += 2; |
18068523 | 1616 | |
0b79459b AH |
1617 | if (unlikely(kvm_read_guest_cached(v->kvm, &vcpu->pv_time, |
1618 | &guest_hv_clock, sizeof(guest_hv_clock)))) | |
1619 | return 0; | |
78c0337a MT |
1620 | |
1621 | /* retain PVCLOCK_GUEST_STOPPED if set in guest copy */ | |
0b79459b | 1622 | pvclock_flags = (guest_hv_clock.flags & PVCLOCK_GUEST_STOPPED); |
78c0337a MT |
1623 | |
1624 | if (vcpu->pvclock_set_guest_stopped_request) { | |
1625 | pvclock_flags |= PVCLOCK_GUEST_STOPPED; | |
1626 | vcpu->pvclock_set_guest_stopped_request = false; | |
1627 | } | |
1628 | ||
d828199e MT |
1629 | /* If the host uses TSC clocksource, then it is stable */ |
1630 | if (use_master_clock) | |
1631 | pvclock_flags |= PVCLOCK_TSC_STABLE_BIT; | |
1632 | ||
78c0337a MT |
1633 | vcpu->hv_clock.flags = pvclock_flags; |
1634 | ||
0b79459b AH |
1635 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
1636 | &vcpu->hv_clock, | |
1637 | sizeof(vcpu->hv_clock)); | |
8cfdc000 | 1638 | return 0; |
c8076604 GH |
1639 | } |
1640 | ||
0061d53d MT |
1641 | /* |
1642 | * kvmclock updates which are isolated to a given vcpu, such as | |
1643 | * vcpu->cpu migration, should not allow system_timestamp from | |
1644 | * the rest of the vcpus to remain static. Otherwise ntp frequency | |
1645 | * correction applies to one vcpu's system_timestamp but not | |
1646 | * the others. | |
1647 | * | |
1648 | * So in those cases, request a kvmclock update for all vcpus. | |
7e44e449 AJ |
1649 | * We need to rate-limit these requests though, as they can |
1650 | * considerably slow guests that have a large number of vcpus. | |
1651 | * The time for a remote vcpu to update its kvmclock is bound | |
1652 | * by the delay we use to rate-limit the updates. | |
0061d53d MT |
1653 | */ |
1654 | ||
7e44e449 AJ |
1655 | #define KVMCLOCK_UPDATE_DELAY msecs_to_jiffies(100) |
1656 | ||
1657 | static void kvmclock_update_fn(struct work_struct *work) | |
0061d53d MT |
1658 | { |
1659 | int i; | |
7e44e449 AJ |
1660 | struct delayed_work *dwork = to_delayed_work(work); |
1661 | struct kvm_arch *ka = container_of(dwork, struct kvm_arch, | |
1662 | kvmclock_update_work); | |
1663 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
0061d53d MT |
1664 | struct kvm_vcpu *vcpu; |
1665 | ||
1666 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1667 | set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); | |
1668 | kvm_vcpu_kick(vcpu); | |
1669 | } | |
1670 | } | |
1671 | ||
7e44e449 AJ |
1672 | static void kvm_gen_kvmclock_update(struct kvm_vcpu *v) |
1673 | { | |
1674 | struct kvm *kvm = v->kvm; | |
1675 | ||
1676 | set_bit(KVM_REQ_CLOCK_UPDATE, &v->requests); | |
1677 | schedule_delayed_work(&kvm->arch.kvmclock_update_work, | |
1678 | KVMCLOCK_UPDATE_DELAY); | |
1679 | } | |
1680 | ||
332967a3 AJ |
1681 | #define KVMCLOCK_SYNC_PERIOD (300 * HZ) |
1682 | ||
1683 | static void kvmclock_sync_fn(struct work_struct *work) | |
1684 | { | |
1685 | struct delayed_work *dwork = to_delayed_work(work); | |
1686 | struct kvm_arch *ka = container_of(dwork, struct kvm_arch, | |
1687 | kvmclock_sync_work); | |
1688 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
1689 | ||
1690 | schedule_delayed_work(&kvm->arch.kvmclock_update_work, 0); | |
1691 | schedule_delayed_work(&kvm->arch.kvmclock_sync_work, | |
1692 | KVMCLOCK_SYNC_PERIOD); | |
1693 | } | |
1694 | ||
9ba075a6 AK |
1695 | static bool msr_mtrr_valid(unsigned msr) |
1696 | { | |
1697 | switch (msr) { | |
1698 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: | |
1699 | case MSR_MTRRfix64K_00000: | |
1700 | case MSR_MTRRfix16K_80000: | |
1701 | case MSR_MTRRfix16K_A0000: | |
1702 | case MSR_MTRRfix4K_C0000: | |
1703 | case MSR_MTRRfix4K_C8000: | |
1704 | case MSR_MTRRfix4K_D0000: | |
1705 | case MSR_MTRRfix4K_D8000: | |
1706 | case MSR_MTRRfix4K_E0000: | |
1707 | case MSR_MTRRfix4K_E8000: | |
1708 | case MSR_MTRRfix4K_F0000: | |
1709 | case MSR_MTRRfix4K_F8000: | |
1710 | case MSR_MTRRdefType: | |
1711 | case MSR_IA32_CR_PAT: | |
1712 | return true; | |
1713 | case 0x2f8: | |
1714 | return true; | |
1715 | } | |
1716 | return false; | |
1717 | } | |
1718 | ||
d6289b93 MT |
1719 | static bool valid_pat_type(unsigned t) |
1720 | { | |
1721 | return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */ | |
1722 | } | |
1723 | ||
1724 | static bool valid_mtrr_type(unsigned t) | |
1725 | { | |
1726 | return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ | |
1727 | } | |
1728 | ||
1729 | static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1730 | { | |
1731 | int i; | |
fd275235 | 1732 | u64 mask; |
d6289b93 MT |
1733 | |
1734 | if (!msr_mtrr_valid(msr)) | |
1735 | return false; | |
1736 | ||
1737 | if (msr == MSR_IA32_CR_PAT) { | |
1738 | for (i = 0; i < 8; i++) | |
1739 | if (!valid_pat_type((data >> (i * 8)) & 0xff)) | |
1740 | return false; | |
1741 | return true; | |
1742 | } else if (msr == MSR_MTRRdefType) { | |
1743 | if (data & ~0xcff) | |
1744 | return false; | |
1745 | return valid_mtrr_type(data & 0xff); | |
1746 | } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) { | |
1747 | for (i = 0; i < 8 ; i++) | |
1748 | if (!valid_mtrr_type((data >> (i * 8)) & 0xff)) | |
1749 | return false; | |
1750 | return true; | |
1751 | } | |
1752 | ||
1753 | /* variable MTRRs */ | |
adfb5d27 WL |
1754 | WARN_ON(!(msr >= 0x200 && msr < 0x200 + 2 * KVM_NR_VAR_MTRR)); |
1755 | ||
fd275235 | 1756 | mask = (~0ULL) << cpuid_maxphyaddr(vcpu); |
d7a2a246 | 1757 | if ((msr & 1) == 0) { |
adfb5d27 | 1758 | /* MTRR base */ |
d7a2a246 WL |
1759 | if (!valid_mtrr_type(data & 0xff)) |
1760 | return false; | |
1761 | mask |= 0xf00; | |
1762 | } else | |
1763 | /* MTRR mask */ | |
1764 | mask |= 0x7ff; | |
1765 | if (data & mask) { | |
1766 | kvm_inject_gp(vcpu, 0); | |
1767 | return false; | |
1768 | } | |
1769 | ||
adfb5d27 | 1770 | return true; |
d6289b93 MT |
1771 | } |
1772 | ||
9ba075a6 AK |
1773 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1774 | { | |
0bed3b56 SY |
1775 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
1776 | ||
d6289b93 | 1777 | if (!mtrr_valid(vcpu, msr, data)) |
9ba075a6 AK |
1778 | return 1; |
1779 | ||
0bed3b56 SY |
1780 | if (msr == MSR_MTRRdefType) { |
1781 | vcpu->arch.mtrr_state.def_type = data; | |
1782 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; | |
1783 | } else if (msr == MSR_MTRRfix64K_00000) | |
1784 | p[0] = data; | |
1785 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
1786 | p[1 + msr - MSR_MTRRfix16K_80000] = data; | |
1787 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
1788 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; | |
1789 | else if (msr == MSR_IA32_CR_PAT) | |
1790 | vcpu->arch.pat = data; | |
1791 | else { /* Variable MTRRs */ | |
1792 | int idx, is_mtrr_mask; | |
1793 | u64 *pt; | |
1794 | ||
1795 | idx = (msr - 0x200) / 2; | |
1796 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
1797 | if (!is_mtrr_mask) | |
1798 | pt = | |
1799 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
1800 | else | |
1801 | pt = | |
1802 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
1803 | *pt = data; | |
1804 | } | |
1805 | ||
1806 | kvm_mmu_reset_context(vcpu); | |
9ba075a6 AK |
1807 | return 0; |
1808 | } | |
15c4a640 | 1809 | |
890ca9ae | 1810 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
15c4a640 | 1811 | { |
890ca9ae HY |
1812 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1813 | unsigned bank_num = mcg_cap & 0xff; | |
1814 | ||
15c4a640 | 1815 | switch (msr) { |
15c4a640 | 1816 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 1817 | vcpu->arch.mcg_status = data; |
15c4a640 | 1818 | break; |
c7ac679c | 1819 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1820 | if (!(mcg_cap & MCG_CTL_P)) |
1821 | return 1; | |
1822 | if (data != 0 && data != ~(u64)0) | |
1823 | return -1; | |
1824 | vcpu->arch.mcg_ctl = data; | |
1825 | break; | |
1826 | default: | |
1827 | if (msr >= MSR_IA32_MC0_CTL && | |
1828 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1829 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
114be429 AP |
1830 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
1831 | * some Linux kernels though clear bit 10 in bank 4 to | |
1832 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore | |
1833 | * this to avoid an uncatched #GP in the guest | |
1834 | */ | |
890ca9ae | 1835 | if ((offset & 0x3) == 0 && |
114be429 | 1836 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
890ca9ae HY |
1837 | return -1; |
1838 | vcpu->arch.mce_banks[offset] = data; | |
1839 | break; | |
1840 | } | |
1841 | return 1; | |
1842 | } | |
1843 | return 0; | |
1844 | } | |
1845 | ||
ffde22ac ES |
1846 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
1847 | { | |
1848 | struct kvm *kvm = vcpu->kvm; | |
1849 | int lm = is_long_mode(vcpu); | |
1850 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
1851 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
1852 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
1853 | : kvm->arch.xen_hvm_config.blob_size_32; | |
1854 | u32 page_num = data & ~PAGE_MASK; | |
1855 | u64 page_addr = data & PAGE_MASK; | |
1856 | u8 *page; | |
1857 | int r; | |
1858 | ||
1859 | r = -E2BIG; | |
1860 | if (page_num >= blob_size) | |
1861 | goto out; | |
1862 | r = -ENOMEM; | |
ff5c2c03 SL |
1863 | page = memdup_user(blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE); |
1864 | if (IS_ERR(page)) { | |
1865 | r = PTR_ERR(page); | |
ffde22ac | 1866 | goto out; |
ff5c2c03 | 1867 | } |
ffde22ac ES |
1868 | if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE)) |
1869 | goto out_free; | |
1870 | r = 0; | |
1871 | out_free: | |
1872 | kfree(page); | |
1873 | out: | |
1874 | return r; | |
1875 | } | |
1876 | ||
55cd8e5a GN |
1877 | static bool kvm_hv_hypercall_enabled(struct kvm *kvm) |
1878 | { | |
1879 | return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE; | |
1880 | } | |
1881 | ||
1882 | static bool kvm_hv_msr_partition_wide(u32 msr) | |
1883 | { | |
1884 | bool r = false; | |
1885 | switch (msr) { | |
1886 | case HV_X64_MSR_GUEST_OS_ID: | |
1887 | case HV_X64_MSR_HYPERCALL: | |
e984097b VR |
1888 | case HV_X64_MSR_REFERENCE_TSC: |
1889 | case HV_X64_MSR_TIME_REF_COUNT: | |
55cd8e5a GN |
1890 | r = true; |
1891 | break; | |
1892 | } | |
1893 | ||
1894 | return r; | |
1895 | } | |
1896 | ||
1897 | static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1898 | { | |
1899 | struct kvm *kvm = vcpu->kvm; | |
1900 | ||
1901 | switch (msr) { | |
1902 | case HV_X64_MSR_GUEST_OS_ID: | |
1903 | kvm->arch.hv_guest_os_id = data; | |
1904 | /* setting guest os id to zero disables hypercall page */ | |
1905 | if (!kvm->arch.hv_guest_os_id) | |
1906 | kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE; | |
1907 | break; | |
1908 | case HV_X64_MSR_HYPERCALL: { | |
1909 | u64 gfn; | |
1910 | unsigned long addr; | |
1911 | u8 instructions[4]; | |
1912 | ||
1913 | /* if guest os id is not set hypercall should remain disabled */ | |
1914 | if (!kvm->arch.hv_guest_os_id) | |
1915 | break; | |
1916 | if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) { | |
1917 | kvm->arch.hv_hypercall = data; | |
1918 | break; | |
1919 | } | |
1920 | gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT; | |
1921 | addr = gfn_to_hva(kvm, gfn); | |
1922 | if (kvm_is_error_hva(addr)) | |
1923 | return 1; | |
1924 | kvm_x86_ops->patch_hypercall(vcpu, instructions); | |
1925 | ((unsigned char *)instructions)[3] = 0xc3; /* ret */ | |
8b0cedff | 1926 | if (__copy_to_user((void __user *)addr, instructions, 4)) |
55cd8e5a GN |
1927 | return 1; |
1928 | kvm->arch.hv_hypercall = data; | |
b94b64c9 | 1929 | mark_page_dirty(kvm, gfn); |
55cd8e5a GN |
1930 | break; |
1931 | } | |
e984097b VR |
1932 | case HV_X64_MSR_REFERENCE_TSC: { |
1933 | u64 gfn; | |
1934 | HV_REFERENCE_TSC_PAGE tsc_ref; | |
1935 | memset(&tsc_ref, 0, sizeof(tsc_ref)); | |
1936 | kvm->arch.hv_tsc_page = data; | |
1937 | if (!(data & HV_X64_MSR_TSC_REFERENCE_ENABLE)) | |
1938 | break; | |
1939 | gfn = data >> HV_X64_MSR_TSC_REFERENCE_ADDRESS_SHIFT; | |
e1fa108d | 1940 | if (kvm_write_guest(kvm, gfn << HV_X64_MSR_TSC_REFERENCE_ADDRESS_SHIFT, |
e984097b VR |
1941 | &tsc_ref, sizeof(tsc_ref))) |
1942 | return 1; | |
1943 | mark_page_dirty(kvm, gfn); | |
1944 | break; | |
1945 | } | |
55cd8e5a | 1946 | default: |
a737f256 CD |
1947 | vcpu_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " |
1948 | "data 0x%llx\n", msr, data); | |
55cd8e5a GN |
1949 | return 1; |
1950 | } | |
1951 | return 0; | |
1952 | } | |
1953 | ||
1954 | static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1955 | { | |
10388a07 GN |
1956 | switch (msr) { |
1957 | case HV_X64_MSR_APIC_ASSIST_PAGE: { | |
b3af1e88 | 1958 | u64 gfn; |
10388a07 | 1959 | unsigned long addr; |
55cd8e5a | 1960 | |
10388a07 GN |
1961 | if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) { |
1962 | vcpu->arch.hv_vapic = data; | |
b63cf42f MT |
1963 | if (kvm_lapic_enable_pv_eoi(vcpu, 0)) |
1964 | return 1; | |
10388a07 GN |
1965 | break; |
1966 | } | |
b3af1e88 VR |
1967 | gfn = data >> HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT; |
1968 | addr = gfn_to_hva(vcpu->kvm, gfn); | |
10388a07 GN |
1969 | if (kvm_is_error_hva(addr)) |
1970 | return 1; | |
8b0cedff | 1971 | if (__clear_user((void __user *)addr, PAGE_SIZE)) |
10388a07 GN |
1972 | return 1; |
1973 | vcpu->arch.hv_vapic = data; | |
b3af1e88 | 1974 | mark_page_dirty(vcpu->kvm, gfn); |
b63cf42f MT |
1975 | if (kvm_lapic_enable_pv_eoi(vcpu, gfn_to_gpa(gfn) | KVM_MSR_ENABLED)) |
1976 | return 1; | |
10388a07 GN |
1977 | break; |
1978 | } | |
1979 | case HV_X64_MSR_EOI: | |
1980 | return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data); | |
1981 | case HV_X64_MSR_ICR: | |
1982 | return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data); | |
1983 | case HV_X64_MSR_TPR: | |
1984 | return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data); | |
1985 | default: | |
a737f256 CD |
1986 | vcpu_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " |
1987 | "data 0x%llx\n", msr, data); | |
10388a07 GN |
1988 | return 1; |
1989 | } | |
1990 | ||
1991 | return 0; | |
55cd8e5a GN |
1992 | } |
1993 | ||
344d9588 GN |
1994 | static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data) |
1995 | { | |
1996 | gpa_t gpa = data & ~0x3f; | |
1997 | ||
4a969980 | 1998 | /* Bits 2:5 are reserved, Should be zero */ |
6adba527 | 1999 | if (data & 0x3c) |
344d9588 GN |
2000 | return 1; |
2001 | ||
2002 | vcpu->arch.apf.msr_val = data; | |
2003 | ||
2004 | if (!(data & KVM_ASYNC_PF_ENABLED)) { | |
2005 | kvm_clear_async_pf_completion_queue(vcpu); | |
2006 | kvm_async_pf_hash_reset(vcpu); | |
2007 | return 0; | |
2008 | } | |
2009 | ||
8f964525 AH |
2010 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.apf.data, gpa, |
2011 | sizeof(u32))) | |
344d9588 GN |
2012 | return 1; |
2013 | ||
6adba527 | 2014 | vcpu->arch.apf.send_user_only = !(data & KVM_ASYNC_PF_SEND_ALWAYS); |
344d9588 GN |
2015 | kvm_async_pf_wakeup_all(vcpu); |
2016 | return 0; | |
2017 | } | |
2018 | ||
12f9a48f GC |
2019 | static void kvmclock_reset(struct kvm_vcpu *vcpu) |
2020 | { | |
0b79459b | 2021 | vcpu->arch.pv_time_enabled = false; |
12f9a48f GC |
2022 | } |
2023 | ||
c9aaa895 GC |
2024 | static void accumulate_steal_time(struct kvm_vcpu *vcpu) |
2025 | { | |
2026 | u64 delta; | |
2027 | ||
2028 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
2029 | return; | |
2030 | ||
2031 | delta = current->sched_info.run_delay - vcpu->arch.st.last_steal; | |
2032 | vcpu->arch.st.last_steal = current->sched_info.run_delay; | |
2033 | vcpu->arch.st.accum_steal = delta; | |
2034 | } | |
2035 | ||
2036 | static void record_steal_time(struct kvm_vcpu *vcpu) | |
2037 | { | |
2038 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
2039 | return; | |
2040 | ||
2041 | if (unlikely(kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, | |
2042 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)))) | |
2043 | return; | |
2044 | ||
2045 | vcpu->arch.st.steal.steal += vcpu->arch.st.accum_steal; | |
2046 | vcpu->arch.st.steal.version += 2; | |
2047 | vcpu->arch.st.accum_steal = 0; | |
2048 | ||
2049 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, | |
2050 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); | |
2051 | } | |
2052 | ||
8fe8ab46 | 2053 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
15c4a640 | 2054 | { |
5753785f | 2055 | bool pr = false; |
8fe8ab46 WA |
2056 | u32 msr = msr_info->index; |
2057 | u64 data = msr_info->data; | |
5753785f | 2058 | |
15c4a640 | 2059 | switch (msr) { |
2e32b719 BP |
2060 | case MSR_AMD64_NB_CFG: |
2061 | case MSR_IA32_UCODE_REV: | |
2062 | case MSR_IA32_UCODE_WRITE: | |
2063 | case MSR_VM_HSAVE_PA: | |
2064 | case MSR_AMD64_PATCH_LOADER: | |
2065 | case MSR_AMD64_BU_CFG2: | |
2066 | break; | |
2067 | ||
15c4a640 | 2068 | case MSR_EFER: |
b69e8cae | 2069 | return set_efer(vcpu, data); |
8f1589d9 AP |
2070 | case MSR_K7_HWCR: |
2071 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
82494028 | 2072 | data &= ~(u64)0x100; /* ignore ignne emulation enable */ |
a223c313 | 2073 | data &= ~(u64)0x8; /* ignore TLB cache disable */ |
22d48b2d | 2074 | data &= ~(u64)0x40000; /* ignore Mc status write enable */ |
8f1589d9 | 2075 | if (data != 0) { |
a737f256 CD |
2076 | vcpu_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", |
2077 | data); | |
8f1589d9 AP |
2078 | return 1; |
2079 | } | |
15c4a640 | 2080 | break; |
f7c6d140 AP |
2081 | case MSR_FAM10H_MMIO_CONF_BASE: |
2082 | if (data != 0) { | |
a737f256 CD |
2083 | vcpu_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " |
2084 | "0x%llx\n", data); | |
f7c6d140 AP |
2085 | return 1; |
2086 | } | |
15c4a640 | 2087 | break; |
b5e2fec0 AG |
2088 | case MSR_IA32_DEBUGCTLMSR: |
2089 | if (!data) { | |
2090 | /* We support the non-activated case already */ | |
2091 | break; | |
2092 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
2093 | /* Values other than LBR and BTF are vendor-specific, | |
2094 | thus reserved and should throw a #GP */ | |
2095 | return 1; | |
2096 | } | |
a737f256 CD |
2097 | vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", |
2098 | __func__, data); | |
b5e2fec0 | 2099 | break; |
9ba075a6 AK |
2100 | case 0x200 ... 0x2ff: |
2101 | return set_msr_mtrr(vcpu, msr, data); | |
15c4a640 | 2102 | case MSR_IA32_APICBASE: |
58cb628d | 2103 | return kvm_set_apic_base(vcpu, msr_info); |
0105d1a5 GN |
2104 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
2105 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
a3e06bbe LJ |
2106 | case MSR_IA32_TSCDEADLINE: |
2107 | kvm_set_lapic_tscdeadline_msr(vcpu, data); | |
2108 | break; | |
ba904635 WA |
2109 | case MSR_IA32_TSC_ADJUST: |
2110 | if (guest_cpuid_has_tsc_adjust(vcpu)) { | |
2111 | if (!msr_info->host_initiated) { | |
2112 | u64 adj = data - vcpu->arch.ia32_tsc_adjust_msr; | |
2113 | kvm_x86_ops->adjust_tsc_offset(vcpu, adj, true); | |
2114 | } | |
2115 | vcpu->arch.ia32_tsc_adjust_msr = data; | |
2116 | } | |
2117 | break; | |
15c4a640 | 2118 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 2119 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 2120 | break; |
11c6bffa | 2121 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
2122 | case MSR_KVM_WALL_CLOCK: |
2123 | vcpu->kvm->arch.wall_clock = data; | |
2124 | kvm_write_wall_clock(vcpu->kvm, data); | |
2125 | break; | |
11c6bffa | 2126 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 | 2127 | case MSR_KVM_SYSTEM_TIME: { |
0b79459b | 2128 | u64 gpa_offset; |
12f9a48f | 2129 | kvmclock_reset(vcpu); |
18068523 GOC |
2130 | |
2131 | vcpu->arch.time = data; | |
0061d53d | 2132 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
18068523 GOC |
2133 | |
2134 | /* we verify if the enable bit is set... */ | |
2135 | if (!(data & 1)) | |
2136 | break; | |
2137 | ||
0b79459b | 2138 | gpa_offset = data & ~(PAGE_MASK | 1); |
18068523 | 2139 | |
0b79459b | 2140 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, |
8f964525 AH |
2141 | &vcpu->arch.pv_time, data & ~1ULL, |
2142 | sizeof(struct pvclock_vcpu_time_info))) | |
0b79459b AH |
2143 | vcpu->arch.pv_time_enabled = false; |
2144 | else | |
2145 | vcpu->arch.pv_time_enabled = true; | |
32cad84f | 2146 | |
18068523 GOC |
2147 | break; |
2148 | } | |
344d9588 GN |
2149 | case MSR_KVM_ASYNC_PF_EN: |
2150 | if (kvm_pv_enable_async_pf(vcpu, data)) | |
2151 | return 1; | |
2152 | break; | |
c9aaa895 GC |
2153 | case MSR_KVM_STEAL_TIME: |
2154 | ||
2155 | if (unlikely(!sched_info_on())) | |
2156 | return 1; | |
2157 | ||
2158 | if (data & KVM_STEAL_RESERVED_MASK) | |
2159 | return 1; | |
2160 | ||
2161 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.st.stime, | |
8f964525 AH |
2162 | data & KVM_STEAL_VALID_BITS, |
2163 | sizeof(struct kvm_steal_time))) | |
c9aaa895 GC |
2164 | return 1; |
2165 | ||
2166 | vcpu->arch.st.msr_val = data; | |
2167 | ||
2168 | if (!(data & KVM_MSR_ENABLED)) | |
2169 | break; | |
2170 | ||
2171 | vcpu->arch.st.last_steal = current->sched_info.run_delay; | |
2172 | ||
2173 | preempt_disable(); | |
2174 | accumulate_steal_time(vcpu); | |
2175 | preempt_enable(); | |
2176 | ||
2177 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); | |
2178 | ||
2179 | break; | |
ae7a2a3f MT |
2180 | case MSR_KVM_PV_EOI_EN: |
2181 | if (kvm_lapic_enable_pv_eoi(vcpu, data)) | |
2182 | return 1; | |
2183 | break; | |
c9aaa895 | 2184 | |
890ca9ae HY |
2185 | case MSR_IA32_MCG_CTL: |
2186 | case MSR_IA32_MCG_STATUS: | |
2187 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
2188 | return set_msr_mce(vcpu, msr, data); | |
71db6023 AP |
2189 | |
2190 | /* Performance counters are not protected by a CPUID bit, | |
2191 | * so we should check all of them in the generic path for the sake of | |
2192 | * cross vendor migration. | |
2193 | * Writing a zero into the event select MSRs disables them, | |
2194 | * which we perfectly emulate ;-). Any other value should be at least | |
2195 | * reported, some guests depend on them. | |
2196 | */ | |
71db6023 AP |
2197 | case MSR_K7_EVNTSEL0: |
2198 | case MSR_K7_EVNTSEL1: | |
2199 | case MSR_K7_EVNTSEL2: | |
2200 | case MSR_K7_EVNTSEL3: | |
2201 | if (data != 0) | |
a737f256 CD |
2202 | vcpu_unimpl(vcpu, "unimplemented perfctr wrmsr: " |
2203 | "0x%x data 0x%llx\n", msr, data); | |
71db6023 AP |
2204 | break; |
2205 | /* at least RHEL 4 unconditionally writes to the perfctr registers, | |
2206 | * so we ignore writes to make it happy. | |
2207 | */ | |
71db6023 AP |
2208 | case MSR_K7_PERFCTR0: |
2209 | case MSR_K7_PERFCTR1: | |
2210 | case MSR_K7_PERFCTR2: | |
2211 | case MSR_K7_PERFCTR3: | |
a737f256 CD |
2212 | vcpu_unimpl(vcpu, "unimplemented perfctr wrmsr: " |
2213 | "0x%x data 0x%llx\n", msr, data); | |
71db6023 | 2214 | break; |
5753785f GN |
2215 | case MSR_P6_PERFCTR0: |
2216 | case MSR_P6_PERFCTR1: | |
2217 | pr = true; | |
2218 | case MSR_P6_EVNTSEL0: | |
2219 | case MSR_P6_EVNTSEL1: | |
2220 | if (kvm_pmu_msr(vcpu, msr)) | |
afd80d85 | 2221 | return kvm_pmu_set_msr(vcpu, msr_info); |
5753785f GN |
2222 | |
2223 | if (pr || data != 0) | |
a737f256 CD |
2224 | vcpu_unimpl(vcpu, "disabled perfctr wrmsr: " |
2225 | "0x%x data 0x%llx\n", msr, data); | |
5753785f | 2226 | break; |
84e0cefa JS |
2227 | case MSR_K7_CLK_CTL: |
2228 | /* | |
2229 | * Ignore all writes to this no longer documented MSR. | |
2230 | * Writes are only relevant for old K7 processors, | |
2231 | * all pre-dating SVM, but a recommended workaround from | |
4a969980 | 2232 | * AMD for these chips. It is possible to specify the |
84e0cefa JS |
2233 | * affected processor models on the command line, hence |
2234 | * the need to ignore the workaround. | |
2235 | */ | |
2236 | break; | |
55cd8e5a GN |
2237 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
2238 | if (kvm_hv_msr_partition_wide(msr)) { | |
2239 | int r; | |
2240 | mutex_lock(&vcpu->kvm->lock); | |
2241 | r = set_msr_hyperv_pw(vcpu, msr, data); | |
2242 | mutex_unlock(&vcpu->kvm->lock); | |
2243 | return r; | |
2244 | } else | |
2245 | return set_msr_hyperv(vcpu, msr, data); | |
2246 | break; | |
91c9c3ed | 2247 | case MSR_IA32_BBL_CR_CTL3: |
2248 | /* Drop writes to this legacy MSR -- see rdmsr | |
2249 | * counterpart for further detail. | |
2250 | */ | |
a737f256 | 2251 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", msr, data); |
91c9c3ed | 2252 | break; |
2b036c6b BO |
2253 | case MSR_AMD64_OSVW_ID_LENGTH: |
2254 | if (!guest_cpuid_has_osvw(vcpu)) | |
2255 | return 1; | |
2256 | vcpu->arch.osvw.length = data; | |
2257 | break; | |
2258 | case MSR_AMD64_OSVW_STATUS: | |
2259 | if (!guest_cpuid_has_osvw(vcpu)) | |
2260 | return 1; | |
2261 | vcpu->arch.osvw.status = data; | |
2262 | break; | |
15c4a640 | 2263 | default: |
ffde22ac ES |
2264 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
2265 | return xen_hvm_config(vcpu, data); | |
f5132b01 | 2266 | if (kvm_pmu_msr(vcpu, msr)) |
afd80d85 | 2267 | return kvm_pmu_set_msr(vcpu, msr_info); |
ed85c068 | 2268 | if (!ignore_msrs) { |
a737f256 CD |
2269 | vcpu_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", |
2270 | msr, data); | |
ed85c068 AP |
2271 | return 1; |
2272 | } else { | |
a737f256 CD |
2273 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", |
2274 | msr, data); | |
ed85c068 AP |
2275 | break; |
2276 | } | |
15c4a640 CO |
2277 | } |
2278 | return 0; | |
2279 | } | |
2280 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
2281 | ||
2282 | ||
2283 | /* | |
2284 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
2285 | * Returns 0 on success, non-0 otherwise. | |
2286 | * Assumes vcpu_load() was already called. | |
2287 | */ | |
2288 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
2289 | { | |
2290 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); | |
2291 | } | |
2292 | ||
9ba075a6 AK |
2293 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
2294 | { | |
0bed3b56 SY |
2295 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
2296 | ||
9ba075a6 AK |
2297 | if (!msr_mtrr_valid(msr)) |
2298 | return 1; | |
2299 | ||
0bed3b56 SY |
2300 | if (msr == MSR_MTRRdefType) |
2301 | *pdata = vcpu->arch.mtrr_state.def_type + | |
2302 | (vcpu->arch.mtrr_state.enabled << 10); | |
2303 | else if (msr == MSR_MTRRfix64K_00000) | |
2304 | *pdata = p[0]; | |
2305 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
2306 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; | |
2307 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
2308 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; | |
2309 | else if (msr == MSR_IA32_CR_PAT) | |
2310 | *pdata = vcpu->arch.pat; | |
2311 | else { /* Variable MTRRs */ | |
2312 | int idx, is_mtrr_mask; | |
2313 | u64 *pt; | |
2314 | ||
2315 | idx = (msr - 0x200) / 2; | |
2316 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
2317 | if (!is_mtrr_mask) | |
2318 | pt = | |
2319 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
2320 | else | |
2321 | pt = | |
2322 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
2323 | *pdata = *pt; | |
2324 | } | |
2325 | ||
9ba075a6 AK |
2326 | return 0; |
2327 | } | |
2328 | ||
890ca9ae | 2329 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
2330 | { |
2331 | u64 data; | |
890ca9ae HY |
2332 | u64 mcg_cap = vcpu->arch.mcg_cap; |
2333 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
2334 | |
2335 | switch (msr) { | |
15c4a640 CO |
2336 | case MSR_IA32_P5_MC_ADDR: |
2337 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
2338 | data = 0; |
2339 | break; | |
15c4a640 | 2340 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
2341 | data = vcpu->arch.mcg_cap; |
2342 | break; | |
c7ac679c | 2343 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
2344 | if (!(mcg_cap & MCG_CTL_P)) |
2345 | return 1; | |
2346 | data = vcpu->arch.mcg_ctl; | |
2347 | break; | |
2348 | case MSR_IA32_MCG_STATUS: | |
2349 | data = vcpu->arch.mcg_status; | |
2350 | break; | |
2351 | default: | |
2352 | if (msr >= MSR_IA32_MC0_CTL && | |
2353 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
2354 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
2355 | data = vcpu->arch.mce_banks[offset]; | |
2356 | break; | |
2357 | } | |
2358 | return 1; | |
2359 | } | |
2360 | *pdata = data; | |
2361 | return 0; | |
2362 | } | |
2363 | ||
55cd8e5a GN |
2364 | static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
2365 | { | |
2366 | u64 data = 0; | |
2367 | struct kvm *kvm = vcpu->kvm; | |
2368 | ||
2369 | switch (msr) { | |
2370 | case HV_X64_MSR_GUEST_OS_ID: | |
2371 | data = kvm->arch.hv_guest_os_id; | |
2372 | break; | |
2373 | case HV_X64_MSR_HYPERCALL: | |
2374 | data = kvm->arch.hv_hypercall; | |
2375 | break; | |
e984097b VR |
2376 | case HV_X64_MSR_TIME_REF_COUNT: { |
2377 | data = | |
2378 | div_u64(get_kernel_ns() + kvm->arch.kvmclock_offset, 100); | |
2379 | break; | |
2380 | } | |
2381 | case HV_X64_MSR_REFERENCE_TSC: | |
2382 | data = kvm->arch.hv_tsc_page; | |
2383 | break; | |
55cd8e5a | 2384 | default: |
a737f256 | 2385 | vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); |
55cd8e5a GN |
2386 | return 1; |
2387 | } | |
2388 | ||
2389 | *pdata = data; | |
2390 | return 0; | |
2391 | } | |
2392 | ||
2393 | static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) | |
2394 | { | |
2395 | u64 data = 0; | |
2396 | ||
2397 | switch (msr) { | |
2398 | case HV_X64_MSR_VP_INDEX: { | |
2399 | int r; | |
2400 | struct kvm_vcpu *v; | |
684851a1 TY |
2401 | kvm_for_each_vcpu(r, v, vcpu->kvm) { |
2402 | if (v == vcpu) { | |
55cd8e5a | 2403 | data = r; |
684851a1 TY |
2404 | break; |
2405 | } | |
2406 | } | |
55cd8e5a GN |
2407 | break; |
2408 | } | |
10388a07 GN |
2409 | case HV_X64_MSR_EOI: |
2410 | return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata); | |
2411 | case HV_X64_MSR_ICR: | |
2412 | return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata); | |
2413 | case HV_X64_MSR_TPR: | |
2414 | return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata); | |
14fa67ee | 2415 | case HV_X64_MSR_APIC_ASSIST_PAGE: |
d1613ad5 MW |
2416 | data = vcpu->arch.hv_vapic; |
2417 | break; | |
55cd8e5a | 2418 | default: |
a737f256 | 2419 | vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); |
55cd8e5a GN |
2420 | return 1; |
2421 | } | |
2422 | *pdata = data; | |
2423 | return 0; | |
2424 | } | |
2425 | ||
890ca9ae HY |
2426 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
2427 | { | |
2428 | u64 data; | |
2429 | ||
2430 | switch (msr) { | |
890ca9ae | 2431 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 2432 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
2433 | case MSR_IA32_DEBUGCTLMSR: |
2434 | case MSR_IA32_LASTBRANCHFROMIP: | |
2435 | case MSR_IA32_LASTBRANCHTOIP: | |
2436 | case MSR_IA32_LASTINTFROMIP: | |
2437 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd JSR |
2438 | case MSR_K8_SYSCFG: |
2439 | case MSR_K7_HWCR: | |
61a6bd67 | 2440 | case MSR_VM_HSAVE_PA: |
9e699624 | 2441 | case MSR_K7_EVNTSEL0: |
dc9b2d93 WH |
2442 | case MSR_K7_EVNTSEL1: |
2443 | case MSR_K7_EVNTSEL2: | |
2444 | case MSR_K7_EVNTSEL3: | |
1f3ee616 | 2445 | case MSR_K7_PERFCTR0: |
dc9b2d93 WH |
2446 | case MSR_K7_PERFCTR1: |
2447 | case MSR_K7_PERFCTR2: | |
2448 | case MSR_K7_PERFCTR3: | |
1fdbd48c | 2449 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 2450 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 2451 | case MSR_FAM10H_MMIO_CONF_BASE: |
2e32b719 | 2452 | case MSR_AMD64_BU_CFG2: |
15c4a640 CO |
2453 | data = 0; |
2454 | break; | |
5753785f GN |
2455 | case MSR_P6_PERFCTR0: |
2456 | case MSR_P6_PERFCTR1: | |
2457 | case MSR_P6_EVNTSEL0: | |
2458 | case MSR_P6_EVNTSEL1: | |
2459 | if (kvm_pmu_msr(vcpu, msr)) | |
2460 | return kvm_pmu_get_msr(vcpu, msr, pdata); | |
2461 | data = 0; | |
2462 | break; | |
742bc670 MT |
2463 | case MSR_IA32_UCODE_REV: |
2464 | data = 0x100000000ULL; | |
2465 | break; | |
9ba075a6 AK |
2466 | case MSR_MTRRcap: |
2467 | data = 0x500 | KVM_NR_VAR_MTRR; | |
2468 | break; | |
2469 | case 0x200 ... 0x2ff: | |
2470 | return get_msr_mtrr(vcpu, msr, pdata); | |
15c4a640 CO |
2471 | case 0xcd: /* fsb frequency */ |
2472 | data = 3; | |
2473 | break; | |
7b914098 JS |
2474 | /* |
2475 | * MSR_EBC_FREQUENCY_ID | |
2476 | * Conservative value valid for even the basic CPU models. | |
2477 | * Models 0,1: 000 in bits 23:21 indicating a bus speed of | |
2478 | * 100MHz, model 2 000 in bits 18:16 indicating 100MHz, | |
2479 | * and 266MHz for model 3, or 4. Set Core Clock | |
2480 | * Frequency to System Bus Frequency Ratio to 1 (bits | |
2481 | * 31:24) even though these are only valid for CPU | |
2482 | * models > 2, however guests may end up dividing or | |
2483 | * multiplying by zero otherwise. | |
2484 | */ | |
2485 | case MSR_EBC_FREQUENCY_ID: | |
2486 | data = 1 << 24; | |
2487 | break; | |
15c4a640 CO |
2488 | case MSR_IA32_APICBASE: |
2489 | data = kvm_get_apic_base(vcpu); | |
2490 | break; | |
0105d1a5 GN |
2491 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
2492 | return kvm_x2apic_msr_read(vcpu, msr, pdata); | |
2493 | break; | |
a3e06bbe LJ |
2494 | case MSR_IA32_TSCDEADLINE: |
2495 | data = kvm_get_lapic_tscdeadline_msr(vcpu); | |
2496 | break; | |
ba904635 WA |
2497 | case MSR_IA32_TSC_ADJUST: |
2498 | data = (u64)vcpu->arch.ia32_tsc_adjust_msr; | |
2499 | break; | |
15c4a640 | 2500 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 2501 | data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 2502 | break; |
847f0ad8 AG |
2503 | case MSR_IA32_PERF_STATUS: |
2504 | /* TSC increment by tick */ | |
2505 | data = 1000ULL; | |
2506 | /* CPU multiplier */ | |
2507 | data |= (((uint64_t)4ULL) << 40); | |
2508 | break; | |
15c4a640 | 2509 | case MSR_EFER: |
f6801dff | 2510 | data = vcpu->arch.efer; |
15c4a640 | 2511 | break; |
18068523 | 2512 | case MSR_KVM_WALL_CLOCK: |
11c6bffa | 2513 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
2514 | data = vcpu->kvm->arch.wall_clock; |
2515 | break; | |
2516 | case MSR_KVM_SYSTEM_TIME: | |
11c6bffa | 2517 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 GOC |
2518 | data = vcpu->arch.time; |
2519 | break; | |
344d9588 GN |
2520 | case MSR_KVM_ASYNC_PF_EN: |
2521 | data = vcpu->arch.apf.msr_val; | |
2522 | break; | |
c9aaa895 GC |
2523 | case MSR_KVM_STEAL_TIME: |
2524 | data = vcpu->arch.st.msr_val; | |
2525 | break; | |
1d92128f MT |
2526 | case MSR_KVM_PV_EOI_EN: |
2527 | data = vcpu->arch.pv_eoi.msr_val; | |
2528 | break; | |
890ca9ae HY |
2529 | case MSR_IA32_P5_MC_ADDR: |
2530 | case MSR_IA32_P5_MC_TYPE: | |
2531 | case MSR_IA32_MCG_CAP: | |
2532 | case MSR_IA32_MCG_CTL: | |
2533 | case MSR_IA32_MCG_STATUS: | |
2534 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
2535 | return get_msr_mce(vcpu, msr, pdata); | |
84e0cefa JS |
2536 | case MSR_K7_CLK_CTL: |
2537 | /* | |
2538 | * Provide expected ramp-up count for K7. All other | |
2539 | * are set to zero, indicating minimum divisors for | |
2540 | * every field. | |
2541 | * | |
2542 | * This prevents guest kernels on AMD host with CPU | |
2543 | * type 6, model 8 and higher from exploding due to | |
2544 | * the rdmsr failing. | |
2545 | */ | |
2546 | data = 0x20000000; | |
2547 | break; | |
55cd8e5a GN |
2548 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
2549 | if (kvm_hv_msr_partition_wide(msr)) { | |
2550 | int r; | |
2551 | mutex_lock(&vcpu->kvm->lock); | |
2552 | r = get_msr_hyperv_pw(vcpu, msr, pdata); | |
2553 | mutex_unlock(&vcpu->kvm->lock); | |
2554 | return r; | |
2555 | } else | |
2556 | return get_msr_hyperv(vcpu, msr, pdata); | |
2557 | break; | |
91c9c3ed | 2558 | case MSR_IA32_BBL_CR_CTL3: |
2559 | /* This legacy MSR exists but isn't fully documented in current | |
2560 | * silicon. It is however accessed by winxp in very narrow | |
2561 | * scenarios where it sets bit #19, itself documented as | |
2562 | * a "reserved" bit. Best effort attempt to source coherent | |
2563 | * read data here should the balance of the register be | |
2564 | * interpreted by the guest: | |
2565 | * | |
2566 | * L2 cache control register 3: 64GB range, 256KB size, | |
2567 | * enabled, latency 0x1, configured | |
2568 | */ | |
2569 | data = 0xbe702111; | |
2570 | break; | |
2b036c6b BO |
2571 | case MSR_AMD64_OSVW_ID_LENGTH: |
2572 | if (!guest_cpuid_has_osvw(vcpu)) | |
2573 | return 1; | |
2574 | data = vcpu->arch.osvw.length; | |
2575 | break; | |
2576 | case MSR_AMD64_OSVW_STATUS: | |
2577 | if (!guest_cpuid_has_osvw(vcpu)) | |
2578 | return 1; | |
2579 | data = vcpu->arch.osvw.status; | |
2580 | break; | |
15c4a640 | 2581 | default: |
f5132b01 GN |
2582 | if (kvm_pmu_msr(vcpu, msr)) |
2583 | return kvm_pmu_get_msr(vcpu, msr, pdata); | |
ed85c068 | 2584 | if (!ignore_msrs) { |
a737f256 | 2585 | vcpu_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); |
ed85c068 AP |
2586 | return 1; |
2587 | } else { | |
a737f256 | 2588 | vcpu_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr); |
ed85c068 AP |
2589 | data = 0; |
2590 | } | |
2591 | break; | |
15c4a640 CO |
2592 | } |
2593 | *pdata = data; | |
2594 | return 0; | |
2595 | } | |
2596 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
2597 | ||
313a3dc7 CO |
2598 | /* |
2599 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
2600 | * | |
2601 | * @return number of msrs set successfully. | |
2602 | */ | |
2603 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
2604 | struct kvm_msr_entry *entries, | |
2605 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2606 | unsigned index, u64 *data)) | |
2607 | { | |
f656ce01 | 2608 | int i, idx; |
313a3dc7 | 2609 | |
f656ce01 | 2610 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
313a3dc7 CO |
2611 | for (i = 0; i < msrs->nmsrs; ++i) |
2612 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2613 | break; | |
f656ce01 | 2614 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 2615 | |
313a3dc7 CO |
2616 | return i; |
2617 | } | |
2618 | ||
2619 | /* | |
2620 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2621 | * | |
2622 | * @return number of msrs set successfully. | |
2623 | */ | |
2624 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
2625 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2626 | unsigned index, u64 *data), | |
2627 | int writeback) | |
2628 | { | |
2629 | struct kvm_msrs msrs; | |
2630 | struct kvm_msr_entry *entries; | |
2631 | int r, n; | |
2632 | unsigned size; | |
2633 | ||
2634 | r = -EFAULT; | |
2635 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
2636 | goto out; | |
2637 | ||
2638 | r = -E2BIG; | |
2639 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2640 | goto out; | |
2641 | ||
313a3dc7 | 2642 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; |
ff5c2c03 SL |
2643 | entries = memdup_user(user_msrs->entries, size); |
2644 | if (IS_ERR(entries)) { | |
2645 | r = PTR_ERR(entries); | |
313a3dc7 | 2646 | goto out; |
ff5c2c03 | 2647 | } |
313a3dc7 CO |
2648 | |
2649 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
2650 | if (r < 0) | |
2651 | goto out_free; | |
2652 | ||
2653 | r = -EFAULT; | |
2654 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2655 | goto out_free; | |
2656 | ||
2657 | r = n; | |
2658 | ||
2659 | out_free: | |
7a73c028 | 2660 | kfree(entries); |
313a3dc7 CO |
2661 | out: |
2662 | return r; | |
2663 | } | |
2664 | ||
784aa3d7 | 2665 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
018d00d2 ZX |
2666 | { |
2667 | int r; | |
2668 | ||
2669 | switch (ext) { | |
2670 | case KVM_CAP_IRQCHIP: | |
2671 | case KVM_CAP_HLT: | |
2672 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 2673 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 2674 | case KVM_CAP_EXT_CPUID: |
9c15bb1d | 2675 | case KVM_CAP_EXT_EMUL_CPUID: |
c8076604 | 2676 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 2677 | case KVM_CAP_PIT: |
a28e4f5a | 2678 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 2679 | case KVM_CAP_MP_STATE: |
ed848624 | 2680 | case KVM_CAP_SYNC_MMU: |
a355c85c | 2681 | case KVM_CAP_USER_NMI: |
52d939a0 | 2682 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 2683 | case KVM_CAP_IRQ_INJECT_STATUS: |
721eecbf | 2684 | case KVM_CAP_IRQFD: |
d34e6b17 | 2685 | case KVM_CAP_IOEVENTFD: |
f848a5a8 | 2686 | case KVM_CAP_IOEVENTFD_NO_LENGTH: |
c5ff41ce | 2687 | case KVM_CAP_PIT2: |
e9f42757 | 2688 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 2689 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 2690 | case KVM_CAP_XEN_HVM: |
afbcf7ab | 2691 | case KVM_CAP_ADJUST_CLOCK: |
3cfc3092 | 2692 | case KVM_CAP_VCPU_EVENTS: |
55cd8e5a | 2693 | case KVM_CAP_HYPERV: |
10388a07 | 2694 | case KVM_CAP_HYPERV_VAPIC: |
c25bc163 | 2695 | case KVM_CAP_HYPERV_SPIN: |
ab9f4ecb | 2696 | case KVM_CAP_PCI_SEGMENT: |
a1efbe77 | 2697 | case KVM_CAP_DEBUGREGS: |
d2be1651 | 2698 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
2d5b5a66 | 2699 | case KVM_CAP_XSAVE: |
344d9588 | 2700 | case KVM_CAP_ASYNC_PF: |
92a1f12d | 2701 | case KVM_CAP_GET_TSC_KHZ: |
1c0b28c2 | 2702 | case KVM_CAP_KVMCLOCK_CTRL: |
4d8b81ab | 2703 | case KVM_CAP_READONLY_MEM: |
5f66b620 | 2704 | case KVM_CAP_HYPERV_TIME: |
100943c5 | 2705 | case KVM_CAP_IOAPIC_POLARITY_IGNORED: |
2a5bab10 AW |
2706 | #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT |
2707 | case KVM_CAP_ASSIGN_DEV_IRQ: | |
2708 | case KVM_CAP_PCI_2_3: | |
2709 | #endif | |
018d00d2 ZX |
2710 | r = 1; |
2711 | break; | |
542472b5 LV |
2712 | case KVM_CAP_COALESCED_MMIO: |
2713 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
2714 | break; | |
774ead3a AK |
2715 | case KVM_CAP_VAPIC: |
2716 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
2717 | break; | |
f725230a | 2718 | case KVM_CAP_NR_VCPUS: |
8c3ba334 SL |
2719 | r = KVM_SOFT_MAX_VCPUS; |
2720 | break; | |
2721 | case KVM_CAP_MAX_VCPUS: | |
f725230a AK |
2722 | r = KVM_MAX_VCPUS; |
2723 | break; | |
a988b910 | 2724 | case KVM_CAP_NR_MEMSLOTS: |
bbacc0c1 | 2725 | r = KVM_USER_MEM_SLOTS; |
a988b910 | 2726 | break; |
a68a6a72 MT |
2727 | case KVM_CAP_PV_MMU: /* obsolete */ |
2728 | r = 0; | |
2f333bcb | 2729 | break; |
4cee4b72 | 2730 | #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT |
62c476c7 | 2731 | case KVM_CAP_IOMMU: |
a1b60c1c | 2732 | r = iommu_present(&pci_bus_type); |
62c476c7 | 2733 | break; |
4cee4b72 | 2734 | #endif |
890ca9ae HY |
2735 | case KVM_CAP_MCE: |
2736 | r = KVM_MAX_MCE_BANKS; | |
2737 | break; | |
2d5b5a66 SY |
2738 | case KVM_CAP_XCRS: |
2739 | r = cpu_has_xsave; | |
2740 | break; | |
92a1f12d JR |
2741 | case KVM_CAP_TSC_CONTROL: |
2742 | r = kvm_has_tsc_control; | |
2743 | break; | |
4d25a066 JK |
2744 | case KVM_CAP_TSC_DEADLINE_TIMER: |
2745 | r = boot_cpu_has(X86_FEATURE_TSC_DEADLINE_TIMER); | |
2746 | break; | |
018d00d2 ZX |
2747 | default: |
2748 | r = 0; | |
2749 | break; | |
2750 | } | |
2751 | return r; | |
2752 | ||
2753 | } | |
2754 | ||
043405e1 CO |
2755 | long kvm_arch_dev_ioctl(struct file *filp, |
2756 | unsigned int ioctl, unsigned long arg) | |
2757 | { | |
2758 | void __user *argp = (void __user *)arg; | |
2759 | long r; | |
2760 | ||
2761 | switch (ioctl) { | |
2762 | case KVM_GET_MSR_INDEX_LIST: { | |
2763 | struct kvm_msr_list __user *user_msr_list = argp; | |
2764 | struct kvm_msr_list msr_list; | |
2765 | unsigned n; | |
2766 | ||
2767 | r = -EFAULT; | |
2768 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
2769 | goto out; | |
2770 | n = msr_list.nmsrs; | |
2771 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); | |
2772 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) | |
2773 | goto out; | |
2774 | r = -E2BIG; | |
e125e7b6 | 2775 | if (n < msr_list.nmsrs) |
043405e1 CO |
2776 | goto out; |
2777 | r = -EFAULT; | |
2778 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
2779 | num_msrs_to_save * sizeof(u32))) | |
2780 | goto out; | |
e125e7b6 | 2781 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 CO |
2782 | &emulated_msrs, |
2783 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
2784 | goto out; | |
2785 | r = 0; | |
2786 | break; | |
2787 | } | |
9c15bb1d BP |
2788 | case KVM_GET_SUPPORTED_CPUID: |
2789 | case KVM_GET_EMULATED_CPUID: { | |
674eea0f AK |
2790 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
2791 | struct kvm_cpuid2 cpuid; | |
2792 | ||
2793 | r = -EFAULT; | |
2794 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2795 | goto out; | |
9c15bb1d BP |
2796 | |
2797 | r = kvm_dev_ioctl_get_cpuid(&cpuid, cpuid_arg->entries, | |
2798 | ioctl); | |
674eea0f AK |
2799 | if (r) |
2800 | goto out; | |
2801 | ||
2802 | r = -EFAULT; | |
2803 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2804 | goto out; | |
2805 | r = 0; | |
2806 | break; | |
2807 | } | |
890ca9ae HY |
2808 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
2809 | u64 mce_cap; | |
2810 | ||
2811 | mce_cap = KVM_MCE_CAP_SUPPORTED; | |
2812 | r = -EFAULT; | |
2813 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) | |
2814 | goto out; | |
2815 | r = 0; | |
2816 | break; | |
2817 | } | |
043405e1 CO |
2818 | default: |
2819 | r = -EINVAL; | |
2820 | } | |
2821 | out: | |
2822 | return r; | |
2823 | } | |
2824 | ||
f5f48ee1 SY |
2825 | static void wbinvd_ipi(void *garbage) |
2826 | { | |
2827 | wbinvd(); | |
2828 | } | |
2829 | ||
2830 | static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
2831 | { | |
e0f0bbc5 | 2832 | return kvm_arch_has_noncoherent_dma(vcpu->kvm); |
f5f48ee1 SY |
2833 | } |
2834 | ||
313a3dc7 CO |
2835 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
2836 | { | |
f5f48ee1 SY |
2837 | /* Address WBINVD may be executed by guest */ |
2838 | if (need_emulate_wbinvd(vcpu)) { | |
2839 | if (kvm_x86_ops->has_wbinvd_exit()) | |
2840 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
2841 | else if (vcpu->cpu != -1 && vcpu->cpu != cpu) | |
2842 | smp_call_function_single(vcpu->cpu, | |
2843 | wbinvd_ipi, NULL, 1); | |
2844 | } | |
2845 | ||
313a3dc7 | 2846 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
8f6055cb | 2847 | |
0dd6a6ed ZA |
2848 | /* Apply any externally detected TSC adjustments (due to suspend) */ |
2849 | if (unlikely(vcpu->arch.tsc_offset_adjustment)) { | |
2850 | adjust_tsc_offset_host(vcpu, vcpu->arch.tsc_offset_adjustment); | |
2851 | vcpu->arch.tsc_offset_adjustment = 0; | |
2852 | set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); | |
2853 | } | |
8f6055cb | 2854 | |
48434c20 | 2855 | if (unlikely(vcpu->cpu != cpu) || check_tsc_unstable()) { |
6f526ec5 ZA |
2856 | s64 tsc_delta = !vcpu->arch.last_host_tsc ? 0 : |
2857 | native_read_tsc() - vcpu->arch.last_host_tsc; | |
e48672fa ZA |
2858 | if (tsc_delta < 0) |
2859 | mark_tsc_unstable("KVM discovered backwards TSC"); | |
c285545f | 2860 | if (check_tsc_unstable()) { |
b183aa58 ZA |
2861 | u64 offset = kvm_x86_ops->compute_tsc_offset(vcpu, |
2862 | vcpu->arch.last_guest_tsc); | |
2863 | kvm_x86_ops->write_tsc_offset(vcpu, offset); | |
c285545f | 2864 | vcpu->arch.tsc_catchup = 1; |
c285545f | 2865 | } |
d98d07ca MT |
2866 | /* |
2867 | * On a host with synchronized TSC, there is no need to update | |
2868 | * kvmclock on vcpu->cpu migration | |
2869 | */ | |
2870 | if (!vcpu->kvm->arch.use_master_clock || vcpu->cpu == -1) | |
0061d53d | 2871 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
c285545f ZA |
2872 | if (vcpu->cpu != cpu) |
2873 | kvm_migrate_timers(vcpu); | |
e48672fa | 2874 | vcpu->cpu = cpu; |
6b7d7e76 | 2875 | } |
c9aaa895 GC |
2876 | |
2877 | accumulate_steal_time(vcpu); | |
2878 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); | |
313a3dc7 CO |
2879 | } |
2880 | ||
2881 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
2882 | { | |
02daab21 | 2883 | kvm_x86_ops->vcpu_put(vcpu); |
1c11e713 | 2884 | kvm_put_guest_fpu(vcpu); |
6f526ec5 | 2885 | vcpu->arch.last_host_tsc = native_read_tsc(); |
313a3dc7 CO |
2886 | } |
2887 | ||
313a3dc7 CO |
2888 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
2889 | struct kvm_lapic_state *s) | |
2890 | { | |
5a71785d | 2891 | kvm_x86_ops->sync_pir_to_irr(vcpu); |
ad312c7c | 2892 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
2893 | |
2894 | return 0; | |
2895 | } | |
2896 | ||
2897 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
2898 | struct kvm_lapic_state *s) | |
2899 | { | |
64eb0620 | 2900 | kvm_apic_post_state_restore(vcpu, s); |
cb142eb7 | 2901 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
2902 | |
2903 | return 0; | |
2904 | } | |
2905 | ||
f77bc6a4 ZX |
2906 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2907 | struct kvm_interrupt *irq) | |
2908 | { | |
02cdb50f | 2909 | if (irq->irq >= KVM_NR_INTERRUPTS) |
f77bc6a4 ZX |
2910 | return -EINVAL; |
2911 | if (irqchip_in_kernel(vcpu->kvm)) | |
2912 | return -ENXIO; | |
f77bc6a4 | 2913 | |
66fd3f7f | 2914 | kvm_queue_interrupt(vcpu, irq->irq, false); |
3842d135 | 2915 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f77bc6a4 | 2916 | |
f77bc6a4 ZX |
2917 | return 0; |
2918 | } | |
2919 | ||
c4abb7c9 JK |
2920 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
2921 | { | |
c4abb7c9 | 2922 | kvm_inject_nmi(vcpu); |
c4abb7c9 JK |
2923 | |
2924 | return 0; | |
2925 | } | |
2926 | ||
b209749f AK |
2927 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
2928 | struct kvm_tpr_access_ctl *tac) | |
2929 | { | |
2930 | if (tac->flags) | |
2931 | return -EINVAL; | |
2932 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
2933 | return 0; | |
2934 | } | |
2935 | ||
890ca9ae HY |
2936 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
2937 | u64 mcg_cap) | |
2938 | { | |
2939 | int r; | |
2940 | unsigned bank_num = mcg_cap & 0xff, bank; | |
2941 | ||
2942 | r = -EINVAL; | |
a9e38c3e | 2943 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae HY |
2944 | goto out; |
2945 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) | |
2946 | goto out; | |
2947 | r = 0; | |
2948 | vcpu->arch.mcg_cap = mcg_cap; | |
2949 | /* Init IA32_MCG_CTL to all 1s */ | |
2950 | if (mcg_cap & MCG_CTL_P) | |
2951 | vcpu->arch.mcg_ctl = ~(u64)0; | |
2952 | /* Init IA32_MCi_CTL to all 1s */ | |
2953 | for (bank = 0; bank < bank_num; bank++) | |
2954 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
2955 | out: | |
2956 | return r; | |
2957 | } | |
2958 | ||
2959 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
2960 | struct kvm_x86_mce *mce) | |
2961 | { | |
2962 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
2963 | unsigned bank_num = mcg_cap & 0xff; | |
2964 | u64 *banks = vcpu->arch.mce_banks; | |
2965 | ||
2966 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
2967 | return -EINVAL; | |
2968 | /* | |
2969 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
2970 | * reporting is disabled | |
2971 | */ | |
2972 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
2973 | vcpu->arch.mcg_ctl != ~(u64)0) | |
2974 | return 0; | |
2975 | banks += 4 * mce->bank; | |
2976 | /* | |
2977 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
2978 | * reporting is disabled for the bank | |
2979 | */ | |
2980 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
2981 | return 0; | |
2982 | if (mce->status & MCI_STATUS_UC) { | |
2983 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 2984 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
a8eeb04a | 2985 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
890ca9ae HY |
2986 | return 0; |
2987 | } | |
2988 | if (banks[1] & MCI_STATUS_VAL) | |
2989 | mce->status |= MCI_STATUS_OVER; | |
2990 | banks[2] = mce->addr; | |
2991 | banks[3] = mce->misc; | |
2992 | vcpu->arch.mcg_status = mce->mcg_status; | |
2993 | banks[1] = mce->status; | |
2994 | kvm_queue_exception(vcpu, MC_VECTOR); | |
2995 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
2996 | || !(banks[1] & MCI_STATUS_UC)) { | |
2997 | if (banks[1] & MCI_STATUS_VAL) | |
2998 | mce->status |= MCI_STATUS_OVER; | |
2999 | banks[2] = mce->addr; | |
3000 | banks[3] = mce->misc; | |
3001 | banks[1] = mce->status; | |
3002 | } else | |
3003 | banks[1] |= MCI_STATUS_OVER; | |
3004 | return 0; | |
3005 | } | |
3006 | ||
3cfc3092 JK |
3007 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
3008 | struct kvm_vcpu_events *events) | |
3009 | { | |
7460fb4a | 3010 | process_nmi(vcpu); |
03b82a30 JK |
3011 | events->exception.injected = |
3012 | vcpu->arch.exception.pending && | |
3013 | !kvm_exception_is_soft(vcpu->arch.exception.nr); | |
3cfc3092 JK |
3014 | events->exception.nr = vcpu->arch.exception.nr; |
3015 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
97e69aa6 | 3016 | events->exception.pad = 0; |
3cfc3092 JK |
3017 | events->exception.error_code = vcpu->arch.exception.error_code; |
3018 | ||
03b82a30 JK |
3019 | events->interrupt.injected = |
3020 | vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft; | |
3cfc3092 | 3021 | events->interrupt.nr = vcpu->arch.interrupt.nr; |
03b82a30 | 3022 | events->interrupt.soft = 0; |
37ccdcbe | 3023 | events->interrupt.shadow = kvm_x86_ops->get_interrupt_shadow(vcpu); |
3cfc3092 JK |
3024 | |
3025 | events->nmi.injected = vcpu->arch.nmi_injected; | |
7460fb4a | 3026 | events->nmi.pending = vcpu->arch.nmi_pending != 0; |
3cfc3092 | 3027 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); |
97e69aa6 | 3028 | events->nmi.pad = 0; |
3cfc3092 | 3029 | |
66450a21 | 3030 | events->sipi_vector = 0; /* never valid when reporting to user space */ |
3cfc3092 | 3031 | |
dab4b911 | 3032 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 | 3033 | | KVM_VCPUEVENT_VALID_SHADOW); |
97e69aa6 | 3034 | memset(&events->reserved, 0, sizeof(events->reserved)); |
3cfc3092 JK |
3035 | } |
3036 | ||
3037 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, | |
3038 | struct kvm_vcpu_events *events) | |
3039 | { | |
dab4b911 | 3040 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 JK |
3041 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
3042 | | KVM_VCPUEVENT_VALID_SHADOW)) | |
3cfc3092 JK |
3043 | return -EINVAL; |
3044 | ||
7460fb4a | 3045 | process_nmi(vcpu); |
3cfc3092 JK |
3046 | vcpu->arch.exception.pending = events->exception.injected; |
3047 | vcpu->arch.exception.nr = events->exception.nr; | |
3048 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
3049 | vcpu->arch.exception.error_code = events->exception.error_code; | |
3050 | ||
3051 | vcpu->arch.interrupt.pending = events->interrupt.injected; | |
3052 | vcpu->arch.interrupt.nr = events->interrupt.nr; | |
3053 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
48005f64 JK |
3054 | if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) |
3055 | kvm_x86_ops->set_interrupt_shadow(vcpu, | |
3056 | events->interrupt.shadow); | |
3cfc3092 JK |
3057 | |
3058 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
3059 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
3060 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
3061 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
3062 | ||
66450a21 JK |
3063 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR && |
3064 | kvm_vcpu_has_lapic(vcpu)) | |
3065 | vcpu->arch.apic->sipi_vector = events->sipi_vector; | |
3cfc3092 | 3066 | |
3842d135 AK |
3067 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
3068 | ||
3cfc3092 JK |
3069 | return 0; |
3070 | } | |
3071 | ||
a1efbe77 JK |
3072 | static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, |
3073 | struct kvm_debugregs *dbgregs) | |
3074 | { | |
73aaf249 JK |
3075 | unsigned long val; |
3076 | ||
a1efbe77 | 3077 | memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db)); |
73aaf249 JK |
3078 | _kvm_get_dr(vcpu, 6, &val); |
3079 | dbgregs->dr6 = val; | |
a1efbe77 JK |
3080 | dbgregs->dr7 = vcpu->arch.dr7; |
3081 | dbgregs->flags = 0; | |
97e69aa6 | 3082 | memset(&dbgregs->reserved, 0, sizeof(dbgregs->reserved)); |
a1efbe77 JK |
3083 | } |
3084 | ||
3085 | static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, | |
3086 | struct kvm_debugregs *dbgregs) | |
3087 | { | |
3088 | if (dbgregs->flags) | |
3089 | return -EINVAL; | |
3090 | ||
a1efbe77 JK |
3091 | memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db)); |
3092 | vcpu->arch.dr6 = dbgregs->dr6; | |
73aaf249 | 3093 | kvm_update_dr6(vcpu); |
a1efbe77 | 3094 | vcpu->arch.dr7 = dbgregs->dr7; |
9926c9fd | 3095 | kvm_update_dr7(vcpu); |
a1efbe77 | 3096 | |
a1efbe77 JK |
3097 | return 0; |
3098 | } | |
3099 | ||
2d5b5a66 SY |
3100 | static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu, |
3101 | struct kvm_xsave *guest_xsave) | |
3102 | { | |
4344ee98 | 3103 | if (cpu_has_xsave) { |
2d5b5a66 SY |
3104 | memcpy(guest_xsave->region, |
3105 | &vcpu->arch.guest_fpu.state->xsave, | |
4344ee98 PB |
3106 | vcpu->arch.guest_xstate_size); |
3107 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] &= | |
3108 | vcpu->arch.guest_supported_xcr0 | XSTATE_FPSSE; | |
3109 | } else { | |
2d5b5a66 SY |
3110 | memcpy(guest_xsave->region, |
3111 | &vcpu->arch.guest_fpu.state->fxsave, | |
3112 | sizeof(struct i387_fxsave_struct)); | |
3113 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] = | |
3114 | XSTATE_FPSSE; | |
3115 | } | |
3116 | } | |
3117 | ||
3118 | static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu, | |
3119 | struct kvm_xsave *guest_xsave) | |
3120 | { | |
3121 | u64 xstate_bv = | |
3122 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)]; | |
3123 | ||
d7876f1b PB |
3124 | if (cpu_has_xsave) { |
3125 | /* | |
3126 | * Here we allow setting states that are not present in | |
3127 | * CPUID leaf 0xD, index 0, EDX:EAX. This is for compatibility | |
3128 | * with old userspace. | |
3129 | */ | |
4ff41732 | 3130 | if (xstate_bv & ~kvm_supported_xcr0()) |
d7876f1b | 3131 | return -EINVAL; |
2d5b5a66 | 3132 | memcpy(&vcpu->arch.guest_fpu.state->xsave, |
4344ee98 | 3133 | guest_xsave->region, vcpu->arch.guest_xstate_size); |
d7876f1b | 3134 | } else { |
2d5b5a66 SY |
3135 | if (xstate_bv & ~XSTATE_FPSSE) |
3136 | return -EINVAL; | |
3137 | memcpy(&vcpu->arch.guest_fpu.state->fxsave, | |
3138 | guest_xsave->region, sizeof(struct i387_fxsave_struct)); | |
3139 | } | |
3140 | return 0; | |
3141 | } | |
3142 | ||
3143 | static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu, | |
3144 | struct kvm_xcrs *guest_xcrs) | |
3145 | { | |
3146 | if (!cpu_has_xsave) { | |
3147 | guest_xcrs->nr_xcrs = 0; | |
3148 | return; | |
3149 | } | |
3150 | ||
3151 | guest_xcrs->nr_xcrs = 1; | |
3152 | guest_xcrs->flags = 0; | |
3153 | guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK; | |
3154 | guest_xcrs->xcrs[0].value = vcpu->arch.xcr0; | |
3155 | } | |
3156 | ||
3157 | static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu, | |
3158 | struct kvm_xcrs *guest_xcrs) | |
3159 | { | |
3160 | int i, r = 0; | |
3161 | ||
3162 | if (!cpu_has_xsave) | |
3163 | return -EINVAL; | |
3164 | ||
3165 | if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags) | |
3166 | return -EINVAL; | |
3167 | ||
3168 | for (i = 0; i < guest_xcrs->nr_xcrs; i++) | |
3169 | /* Only support XCR0 currently */ | |
c67a04cb | 3170 | if (guest_xcrs->xcrs[i].xcr == XCR_XFEATURE_ENABLED_MASK) { |
2d5b5a66 | 3171 | r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK, |
c67a04cb | 3172 | guest_xcrs->xcrs[i].value); |
2d5b5a66 SY |
3173 | break; |
3174 | } | |
3175 | if (r) | |
3176 | r = -EINVAL; | |
3177 | return r; | |
3178 | } | |
3179 | ||
1c0b28c2 EM |
3180 | /* |
3181 | * kvm_set_guest_paused() indicates to the guest kernel that it has been | |
3182 | * stopped by the hypervisor. This function will be called from the host only. | |
3183 | * EINVAL is returned when the host attempts to set the flag for a guest that | |
3184 | * does not support pv clocks. | |
3185 | */ | |
3186 | static int kvm_set_guest_paused(struct kvm_vcpu *vcpu) | |
3187 | { | |
0b79459b | 3188 | if (!vcpu->arch.pv_time_enabled) |
1c0b28c2 | 3189 | return -EINVAL; |
51d59c6b | 3190 | vcpu->arch.pvclock_set_guest_stopped_request = true; |
1c0b28c2 EM |
3191 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
3192 | return 0; | |
3193 | } | |
3194 | ||
313a3dc7 CO |
3195 | long kvm_arch_vcpu_ioctl(struct file *filp, |
3196 | unsigned int ioctl, unsigned long arg) | |
3197 | { | |
3198 | struct kvm_vcpu *vcpu = filp->private_data; | |
3199 | void __user *argp = (void __user *)arg; | |
3200 | int r; | |
d1ac91d8 AK |
3201 | union { |
3202 | struct kvm_lapic_state *lapic; | |
3203 | struct kvm_xsave *xsave; | |
3204 | struct kvm_xcrs *xcrs; | |
3205 | void *buffer; | |
3206 | } u; | |
3207 | ||
3208 | u.buffer = NULL; | |
313a3dc7 CO |
3209 | switch (ioctl) { |
3210 | case KVM_GET_LAPIC: { | |
2204ae3c MT |
3211 | r = -EINVAL; |
3212 | if (!vcpu->arch.apic) | |
3213 | goto out; | |
d1ac91d8 | 3214 | u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 3215 | |
b772ff36 | 3216 | r = -ENOMEM; |
d1ac91d8 | 3217 | if (!u.lapic) |
b772ff36 | 3218 | goto out; |
d1ac91d8 | 3219 | r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3220 | if (r) |
3221 | goto out; | |
3222 | r = -EFAULT; | |
d1ac91d8 | 3223 | if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
3224 | goto out; |
3225 | r = 0; | |
3226 | break; | |
3227 | } | |
3228 | case KVM_SET_LAPIC: { | |
2204ae3c MT |
3229 | r = -EINVAL; |
3230 | if (!vcpu->arch.apic) | |
3231 | goto out; | |
ff5c2c03 | 3232 | u.lapic = memdup_user(argp, sizeof(*u.lapic)); |
18595411 GC |
3233 | if (IS_ERR(u.lapic)) |
3234 | return PTR_ERR(u.lapic); | |
ff5c2c03 | 3235 | |
d1ac91d8 | 3236 | r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3237 | break; |
3238 | } | |
f77bc6a4 ZX |
3239 | case KVM_INTERRUPT: { |
3240 | struct kvm_interrupt irq; | |
3241 | ||
3242 | r = -EFAULT; | |
3243 | if (copy_from_user(&irq, argp, sizeof irq)) | |
3244 | goto out; | |
3245 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
f77bc6a4 ZX |
3246 | break; |
3247 | } | |
c4abb7c9 JK |
3248 | case KVM_NMI: { |
3249 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
c4abb7c9 JK |
3250 | break; |
3251 | } | |
313a3dc7 CO |
3252 | case KVM_SET_CPUID: { |
3253 | struct kvm_cpuid __user *cpuid_arg = argp; | |
3254 | struct kvm_cpuid cpuid; | |
3255 | ||
3256 | r = -EFAULT; | |
3257 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3258 | goto out; | |
3259 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
313a3dc7 CO |
3260 | break; |
3261 | } | |
07716717 DK |
3262 | case KVM_SET_CPUID2: { |
3263 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3264 | struct kvm_cpuid2 cpuid; | |
3265 | ||
3266 | r = -EFAULT; | |
3267 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3268 | goto out; | |
3269 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 3270 | cpuid_arg->entries); |
07716717 DK |
3271 | break; |
3272 | } | |
3273 | case KVM_GET_CPUID2: { | |
3274 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3275 | struct kvm_cpuid2 cpuid; | |
3276 | ||
3277 | r = -EFAULT; | |
3278 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3279 | goto out; | |
3280 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 3281 | cpuid_arg->entries); |
07716717 DK |
3282 | if (r) |
3283 | goto out; | |
3284 | r = -EFAULT; | |
3285 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
3286 | goto out; | |
3287 | r = 0; | |
3288 | break; | |
3289 | } | |
313a3dc7 CO |
3290 | case KVM_GET_MSRS: |
3291 | r = msr_io(vcpu, argp, kvm_get_msr, 1); | |
3292 | break; | |
3293 | case KVM_SET_MSRS: | |
3294 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
3295 | break; | |
b209749f AK |
3296 | case KVM_TPR_ACCESS_REPORTING: { |
3297 | struct kvm_tpr_access_ctl tac; | |
3298 | ||
3299 | r = -EFAULT; | |
3300 | if (copy_from_user(&tac, argp, sizeof tac)) | |
3301 | goto out; | |
3302 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
3303 | if (r) | |
3304 | goto out; | |
3305 | r = -EFAULT; | |
3306 | if (copy_to_user(argp, &tac, sizeof tac)) | |
3307 | goto out; | |
3308 | r = 0; | |
3309 | break; | |
3310 | }; | |
b93463aa AK |
3311 | case KVM_SET_VAPIC_ADDR: { |
3312 | struct kvm_vapic_addr va; | |
3313 | ||
3314 | r = -EINVAL; | |
3315 | if (!irqchip_in_kernel(vcpu->kvm)) | |
3316 | goto out; | |
3317 | r = -EFAULT; | |
3318 | if (copy_from_user(&va, argp, sizeof va)) | |
3319 | goto out; | |
fda4e2e8 | 3320 | r = kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); |
b93463aa AK |
3321 | break; |
3322 | } | |
890ca9ae HY |
3323 | case KVM_X86_SETUP_MCE: { |
3324 | u64 mcg_cap; | |
3325 | ||
3326 | r = -EFAULT; | |
3327 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
3328 | goto out; | |
3329 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
3330 | break; | |
3331 | } | |
3332 | case KVM_X86_SET_MCE: { | |
3333 | struct kvm_x86_mce mce; | |
3334 | ||
3335 | r = -EFAULT; | |
3336 | if (copy_from_user(&mce, argp, sizeof mce)) | |
3337 | goto out; | |
3338 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
3339 | break; | |
3340 | } | |
3cfc3092 JK |
3341 | case KVM_GET_VCPU_EVENTS: { |
3342 | struct kvm_vcpu_events events; | |
3343 | ||
3344 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
3345 | ||
3346 | r = -EFAULT; | |
3347 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
3348 | break; | |
3349 | r = 0; | |
3350 | break; | |
3351 | } | |
3352 | case KVM_SET_VCPU_EVENTS: { | |
3353 | struct kvm_vcpu_events events; | |
3354 | ||
3355 | r = -EFAULT; | |
3356 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
3357 | break; | |
3358 | ||
3359 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
3360 | break; | |
3361 | } | |
a1efbe77 JK |
3362 | case KVM_GET_DEBUGREGS: { |
3363 | struct kvm_debugregs dbgregs; | |
3364 | ||
3365 | kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs); | |
3366 | ||
3367 | r = -EFAULT; | |
3368 | if (copy_to_user(argp, &dbgregs, | |
3369 | sizeof(struct kvm_debugregs))) | |
3370 | break; | |
3371 | r = 0; | |
3372 | break; | |
3373 | } | |
3374 | case KVM_SET_DEBUGREGS: { | |
3375 | struct kvm_debugregs dbgregs; | |
3376 | ||
3377 | r = -EFAULT; | |
3378 | if (copy_from_user(&dbgregs, argp, | |
3379 | sizeof(struct kvm_debugregs))) | |
3380 | break; | |
3381 | ||
3382 | r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs); | |
3383 | break; | |
3384 | } | |
2d5b5a66 | 3385 | case KVM_GET_XSAVE: { |
d1ac91d8 | 3386 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 3387 | r = -ENOMEM; |
d1ac91d8 | 3388 | if (!u.xsave) |
2d5b5a66 SY |
3389 | break; |
3390 | ||
d1ac91d8 | 3391 | kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3392 | |
3393 | r = -EFAULT; | |
d1ac91d8 | 3394 | if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
3395 | break; |
3396 | r = 0; | |
3397 | break; | |
3398 | } | |
3399 | case KVM_SET_XSAVE: { | |
ff5c2c03 | 3400 | u.xsave = memdup_user(argp, sizeof(*u.xsave)); |
18595411 GC |
3401 | if (IS_ERR(u.xsave)) |
3402 | return PTR_ERR(u.xsave); | |
2d5b5a66 | 3403 | |
d1ac91d8 | 3404 | r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3405 | break; |
3406 | } | |
3407 | case KVM_GET_XCRS: { | |
d1ac91d8 | 3408 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 3409 | r = -ENOMEM; |
d1ac91d8 | 3410 | if (!u.xcrs) |
2d5b5a66 SY |
3411 | break; |
3412 | ||
d1ac91d8 | 3413 | kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3414 | |
3415 | r = -EFAULT; | |
d1ac91d8 | 3416 | if (copy_to_user(argp, u.xcrs, |
2d5b5a66 SY |
3417 | sizeof(struct kvm_xcrs))) |
3418 | break; | |
3419 | r = 0; | |
3420 | break; | |
3421 | } | |
3422 | case KVM_SET_XCRS: { | |
ff5c2c03 | 3423 | u.xcrs = memdup_user(argp, sizeof(*u.xcrs)); |
18595411 GC |
3424 | if (IS_ERR(u.xcrs)) |
3425 | return PTR_ERR(u.xcrs); | |
2d5b5a66 | 3426 | |
d1ac91d8 | 3427 | r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3428 | break; |
3429 | } | |
92a1f12d JR |
3430 | case KVM_SET_TSC_KHZ: { |
3431 | u32 user_tsc_khz; | |
3432 | ||
3433 | r = -EINVAL; | |
92a1f12d JR |
3434 | user_tsc_khz = (u32)arg; |
3435 | ||
3436 | if (user_tsc_khz >= kvm_max_guest_tsc_khz) | |
3437 | goto out; | |
3438 | ||
cc578287 ZA |
3439 | if (user_tsc_khz == 0) |
3440 | user_tsc_khz = tsc_khz; | |
3441 | ||
3442 | kvm_set_tsc_khz(vcpu, user_tsc_khz); | |
92a1f12d JR |
3443 | |
3444 | r = 0; | |
3445 | goto out; | |
3446 | } | |
3447 | case KVM_GET_TSC_KHZ: { | |
cc578287 | 3448 | r = vcpu->arch.virtual_tsc_khz; |
92a1f12d JR |
3449 | goto out; |
3450 | } | |
1c0b28c2 EM |
3451 | case KVM_KVMCLOCK_CTRL: { |
3452 | r = kvm_set_guest_paused(vcpu); | |
3453 | goto out; | |
3454 | } | |
313a3dc7 CO |
3455 | default: |
3456 | r = -EINVAL; | |
3457 | } | |
3458 | out: | |
d1ac91d8 | 3459 | kfree(u.buffer); |
313a3dc7 CO |
3460 | return r; |
3461 | } | |
3462 | ||
5b1c1493 CO |
3463 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
3464 | { | |
3465 | return VM_FAULT_SIGBUS; | |
3466 | } | |
3467 | ||
1fe779f8 CO |
3468 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
3469 | { | |
3470 | int ret; | |
3471 | ||
3472 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
951179ce | 3473 | return -EINVAL; |
1fe779f8 CO |
3474 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); |
3475 | return ret; | |
3476 | } | |
3477 | ||
b927a3ce SY |
3478 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
3479 | u64 ident_addr) | |
3480 | { | |
3481 | kvm->arch.ept_identity_map_addr = ident_addr; | |
3482 | return 0; | |
3483 | } | |
3484 | ||
1fe779f8 CO |
3485 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
3486 | u32 kvm_nr_mmu_pages) | |
3487 | { | |
3488 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
3489 | return -EINVAL; | |
3490 | ||
79fac95e | 3491 | mutex_lock(&kvm->slots_lock); |
1fe779f8 CO |
3492 | |
3493 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 3494 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 3495 | |
79fac95e | 3496 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
3497 | return 0; |
3498 | } | |
3499 | ||
3500 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
3501 | { | |
39de71ec | 3502 | return kvm->arch.n_max_mmu_pages; |
1fe779f8 CO |
3503 | } |
3504 | ||
1fe779f8 CO |
3505 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
3506 | { | |
3507 | int r; | |
3508 | ||
3509 | r = 0; | |
3510 | switch (chip->chip_id) { | |
3511 | case KVM_IRQCHIP_PIC_MASTER: | |
3512 | memcpy(&chip->chip.pic, | |
3513 | &pic_irqchip(kvm)->pics[0], | |
3514 | sizeof(struct kvm_pic_state)); | |
3515 | break; | |
3516 | case KVM_IRQCHIP_PIC_SLAVE: | |
3517 | memcpy(&chip->chip.pic, | |
3518 | &pic_irqchip(kvm)->pics[1], | |
3519 | sizeof(struct kvm_pic_state)); | |
3520 | break; | |
3521 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 3522 | r = kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3523 | break; |
3524 | default: | |
3525 | r = -EINVAL; | |
3526 | break; | |
3527 | } | |
3528 | return r; | |
3529 | } | |
3530 | ||
3531 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
3532 | { | |
3533 | int r; | |
3534 | ||
3535 | r = 0; | |
3536 | switch (chip->chip_id) { | |
3537 | case KVM_IRQCHIP_PIC_MASTER: | |
f4f51050 | 3538 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3539 | memcpy(&pic_irqchip(kvm)->pics[0], |
3540 | &chip->chip.pic, | |
3541 | sizeof(struct kvm_pic_state)); | |
f4f51050 | 3542 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3543 | break; |
3544 | case KVM_IRQCHIP_PIC_SLAVE: | |
f4f51050 | 3545 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3546 | memcpy(&pic_irqchip(kvm)->pics[1], |
3547 | &chip->chip.pic, | |
3548 | sizeof(struct kvm_pic_state)); | |
f4f51050 | 3549 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3550 | break; |
3551 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 3552 | r = kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3553 | break; |
3554 | default: | |
3555 | r = -EINVAL; | |
3556 | break; | |
3557 | } | |
3558 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
3559 | return r; | |
3560 | } | |
3561 | ||
e0f63cb9 SY |
3562 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
3563 | { | |
3564 | int r = 0; | |
3565 | ||
894a9c55 | 3566 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 3567 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); |
894a9c55 | 3568 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
3569 | return r; |
3570 | } | |
3571 | ||
3572 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
3573 | { | |
3574 | int r = 0; | |
3575 | ||
894a9c55 | 3576 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 3577 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); |
e9f42757 BK |
3578 | kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0); |
3579 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
3580 | return r; | |
3581 | } | |
3582 | ||
3583 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3584 | { | |
3585 | int r = 0; | |
3586 | ||
3587 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
3588 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
3589 | sizeof(ps->channels)); | |
3590 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
3591 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
97e69aa6 | 3592 | memset(&ps->reserved, 0, sizeof(ps->reserved)); |
e9f42757 BK |
3593 | return r; |
3594 | } | |
3595 | ||
3596 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3597 | { | |
3598 | int r = 0, start = 0; | |
3599 | u32 prev_legacy, cur_legacy; | |
3600 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
3601 | prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
3602 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
3603 | if (!prev_legacy && cur_legacy) | |
3604 | start = 1; | |
3605 | memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels, | |
3606 | sizeof(kvm->arch.vpit->pit_state.channels)); | |
3607 | kvm->arch.vpit->pit_state.flags = ps->flags; | |
3608 | kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start); | |
894a9c55 | 3609 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
3610 | return r; |
3611 | } | |
3612 | ||
52d939a0 MT |
3613 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
3614 | struct kvm_reinject_control *control) | |
3615 | { | |
3616 | if (!kvm->arch.vpit) | |
3617 | return -ENXIO; | |
894a9c55 | 3618 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
26ef1924 | 3619 | kvm->arch.vpit->pit_state.reinject = control->pit_reinject; |
894a9c55 | 3620 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 MT |
3621 | return 0; |
3622 | } | |
3623 | ||
95d4c16c | 3624 | /** |
60c34612 TY |
3625 | * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot |
3626 | * @kvm: kvm instance | |
3627 | * @log: slot id and address to which we copy the log | |
95d4c16c | 3628 | * |
60c34612 TY |
3629 | * We need to keep it in mind that VCPU threads can write to the bitmap |
3630 | * concurrently. So, to avoid losing data, we keep the following order for | |
3631 | * each bit: | |
95d4c16c | 3632 | * |
60c34612 TY |
3633 | * 1. Take a snapshot of the bit and clear it if needed. |
3634 | * 2. Write protect the corresponding page. | |
3635 | * 3. Flush TLB's if needed. | |
3636 | * 4. Copy the snapshot to the userspace. | |
95d4c16c | 3637 | * |
60c34612 TY |
3638 | * Between 2 and 3, the guest may write to the page using the remaining TLB |
3639 | * entry. This is not a problem because the page will be reported dirty at | |
3640 | * step 4 using the snapshot taken before and step 3 ensures that successive | |
3641 | * writes will be logged for the next call. | |
5bb064dc | 3642 | */ |
60c34612 | 3643 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
5bb064dc | 3644 | { |
7850ac54 | 3645 | int r; |
5bb064dc | 3646 | struct kvm_memory_slot *memslot; |
60c34612 TY |
3647 | unsigned long n, i; |
3648 | unsigned long *dirty_bitmap; | |
3649 | unsigned long *dirty_bitmap_buffer; | |
3650 | bool is_dirty = false; | |
5bb064dc | 3651 | |
79fac95e | 3652 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 3653 | |
b050b015 | 3654 | r = -EINVAL; |
bbacc0c1 | 3655 | if (log->slot >= KVM_USER_MEM_SLOTS) |
b050b015 MT |
3656 | goto out; |
3657 | ||
28a37544 | 3658 | memslot = id_to_memslot(kvm->memslots, log->slot); |
60c34612 TY |
3659 | |
3660 | dirty_bitmap = memslot->dirty_bitmap; | |
b050b015 | 3661 | r = -ENOENT; |
60c34612 | 3662 | if (!dirty_bitmap) |
b050b015 MT |
3663 | goto out; |
3664 | ||
87bf6e7d | 3665 | n = kvm_dirty_bitmap_bytes(memslot); |
b050b015 | 3666 | |
60c34612 TY |
3667 | dirty_bitmap_buffer = dirty_bitmap + n / sizeof(long); |
3668 | memset(dirty_bitmap_buffer, 0, n); | |
b050b015 | 3669 | |
60c34612 | 3670 | spin_lock(&kvm->mmu_lock); |
b050b015 | 3671 | |
60c34612 TY |
3672 | for (i = 0; i < n / sizeof(long); i++) { |
3673 | unsigned long mask; | |
3674 | gfn_t offset; | |
cdfca7b3 | 3675 | |
60c34612 TY |
3676 | if (!dirty_bitmap[i]) |
3677 | continue; | |
b050b015 | 3678 | |
60c34612 | 3679 | is_dirty = true; |
914ebccd | 3680 | |
60c34612 TY |
3681 | mask = xchg(&dirty_bitmap[i], 0); |
3682 | dirty_bitmap_buffer[i] = mask; | |
edde99ce | 3683 | |
60c34612 TY |
3684 | offset = i * BITS_PER_LONG; |
3685 | kvm_mmu_write_protect_pt_masked(kvm, memslot, offset, mask); | |
5bb064dc | 3686 | } |
60c34612 TY |
3687 | |
3688 | spin_unlock(&kvm->mmu_lock); | |
3689 | ||
198c74f4 XG |
3690 | /* See the comments in kvm_mmu_slot_remove_write_access(). */ |
3691 | lockdep_assert_held(&kvm->slots_lock); | |
3692 | ||
3693 | /* | |
3694 | * All the TLBs can be flushed out of mmu lock, see the comments in | |
3695 | * kvm_mmu_slot_remove_write_access(). | |
3696 | */ | |
3697 | if (is_dirty) | |
3698 | kvm_flush_remote_tlbs(kvm); | |
3699 | ||
60c34612 TY |
3700 | r = -EFAULT; |
3701 | if (copy_to_user(log->dirty_bitmap, dirty_bitmap_buffer, n)) | |
3702 | goto out; | |
b050b015 | 3703 | |
5bb064dc ZX |
3704 | r = 0; |
3705 | out: | |
79fac95e | 3706 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
3707 | return r; |
3708 | } | |
3709 | ||
aa2fbe6d YZ |
3710 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, |
3711 | bool line_status) | |
23d43cf9 CD |
3712 | { |
3713 | if (!irqchip_in_kernel(kvm)) | |
3714 | return -ENXIO; | |
3715 | ||
3716 | irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, | |
aa2fbe6d YZ |
3717 | irq_event->irq, irq_event->level, |
3718 | line_status); | |
23d43cf9 CD |
3719 | return 0; |
3720 | } | |
3721 | ||
1fe779f8 CO |
3722 | long kvm_arch_vm_ioctl(struct file *filp, |
3723 | unsigned int ioctl, unsigned long arg) | |
3724 | { | |
3725 | struct kvm *kvm = filp->private_data; | |
3726 | void __user *argp = (void __user *)arg; | |
367e1319 | 3727 | int r = -ENOTTY; |
f0d66275 DH |
3728 | /* |
3729 | * This union makes it completely explicit to gcc-3.x | |
3730 | * that these two variables' stack usage should be | |
3731 | * combined, not added together. | |
3732 | */ | |
3733 | union { | |
3734 | struct kvm_pit_state ps; | |
e9f42757 | 3735 | struct kvm_pit_state2 ps2; |
c5ff41ce | 3736 | struct kvm_pit_config pit_config; |
f0d66275 | 3737 | } u; |
1fe779f8 CO |
3738 | |
3739 | switch (ioctl) { | |
3740 | case KVM_SET_TSS_ADDR: | |
3741 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
1fe779f8 | 3742 | break; |
b927a3ce SY |
3743 | case KVM_SET_IDENTITY_MAP_ADDR: { |
3744 | u64 ident_addr; | |
3745 | ||
3746 | r = -EFAULT; | |
3747 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
3748 | goto out; | |
3749 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); | |
b927a3ce SY |
3750 | break; |
3751 | } | |
1fe779f8 CO |
3752 | case KVM_SET_NR_MMU_PAGES: |
3753 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
1fe779f8 CO |
3754 | break; |
3755 | case KVM_GET_NR_MMU_PAGES: | |
3756 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
3757 | break; | |
3ddea128 MT |
3758 | case KVM_CREATE_IRQCHIP: { |
3759 | struct kvm_pic *vpic; | |
3760 | ||
3761 | mutex_lock(&kvm->lock); | |
3762 | r = -EEXIST; | |
3763 | if (kvm->arch.vpic) | |
3764 | goto create_irqchip_unlock; | |
3e515705 AK |
3765 | r = -EINVAL; |
3766 | if (atomic_read(&kvm->online_vcpus)) | |
3767 | goto create_irqchip_unlock; | |
1fe779f8 | 3768 | r = -ENOMEM; |
3ddea128 MT |
3769 | vpic = kvm_create_pic(kvm); |
3770 | if (vpic) { | |
1fe779f8 CO |
3771 | r = kvm_ioapic_init(kvm); |
3772 | if (r) { | |
175504cd | 3773 | mutex_lock(&kvm->slots_lock); |
72bb2fcd | 3774 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, |
743eeb0b SL |
3775 | &vpic->dev_master); |
3776 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, | |
3777 | &vpic->dev_slave); | |
3778 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, | |
3779 | &vpic->dev_eclr); | |
175504cd | 3780 | mutex_unlock(&kvm->slots_lock); |
3ddea128 MT |
3781 | kfree(vpic); |
3782 | goto create_irqchip_unlock; | |
1fe779f8 CO |
3783 | } |
3784 | } else | |
3ddea128 MT |
3785 | goto create_irqchip_unlock; |
3786 | smp_wmb(); | |
3787 | kvm->arch.vpic = vpic; | |
3788 | smp_wmb(); | |
399ec807 AK |
3789 | r = kvm_setup_default_irq_routing(kvm); |
3790 | if (r) { | |
175504cd | 3791 | mutex_lock(&kvm->slots_lock); |
3ddea128 | 3792 | mutex_lock(&kvm->irq_lock); |
72bb2fcd WY |
3793 | kvm_ioapic_destroy(kvm); |
3794 | kvm_destroy_pic(kvm); | |
3ddea128 | 3795 | mutex_unlock(&kvm->irq_lock); |
175504cd | 3796 | mutex_unlock(&kvm->slots_lock); |
399ec807 | 3797 | } |
3ddea128 MT |
3798 | create_irqchip_unlock: |
3799 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 3800 | break; |
3ddea128 | 3801 | } |
7837699f | 3802 | case KVM_CREATE_PIT: |
c5ff41ce JK |
3803 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
3804 | goto create_pit; | |
3805 | case KVM_CREATE_PIT2: | |
3806 | r = -EFAULT; | |
3807 | if (copy_from_user(&u.pit_config, argp, | |
3808 | sizeof(struct kvm_pit_config))) | |
3809 | goto out; | |
3810 | create_pit: | |
79fac95e | 3811 | mutex_lock(&kvm->slots_lock); |
269e05e4 AK |
3812 | r = -EEXIST; |
3813 | if (kvm->arch.vpit) | |
3814 | goto create_pit_unlock; | |
7837699f | 3815 | r = -ENOMEM; |
c5ff41ce | 3816 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
3817 | if (kvm->arch.vpit) |
3818 | r = 0; | |
269e05e4 | 3819 | create_pit_unlock: |
79fac95e | 3820 | mutex_unlock(&kvm->slots_lock); |
7837699f | 3821 | break; |
1fe779f8 CO |
3822 | case KVM_GET_IRQCHIP: { |
3823 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 3824 | struct kvm_irqchip *chip; |
1fe779f8 | 3825 | |
ff5c2c03 SL |
3826 | chip = memdup_user(argp, sizeof(*chip)); |
3827 | if (IS_ERR(chip)) { | |
3828 | r = PTR_ERR(chip); | |
1fe779f8 | 3829 | goto out; |
ff5c2c03 SL |
3830 | } |
3831 | ||
1fe779f8 CO |
3832 | r = -ENXIO; |
3833 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3834 | goto get_irqchip_out; |
3835 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 3836 | if (r) |
f0d66275 | 3837 | goto get_irqchip_out; |
1fe779f8 | 3838 | r = -EFAULT; |
f0d66275 DH |
3839 | if (copy_to_user(argp, chip, sizeof *chip)) |
3840 | goto get_irqchip_out; | |
1fe779f8 | 3841 | r = 0; |
f0d66275 DH |
3842 | get_irqchip_out: |
3843 | kfree(chip); | |
1fe779f8 CO |
3844 | break; |
3845 | } | |
3846 | case KVM_SET_IRQCHIP: { | |
3847 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 3848 | struct kvm_irqchip *chip; |
1fe779f8 | 3849 | |
ff5c2c03 SL |
3850 | chip = memdup_user(argp, sizeof(*chip)); |
3851 | if (IS_ERR(chip)) { | |
3852 | r = PTR_ERR(chip); | |
1fe779f8 | 3853 | goto out; |
ff5c2c03 SL |
3854 | } |
3855 | ||
1fe779f8 CO |
3856 | r = -ENXIO; |
3857 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3858 | goto set_irqchip_out; |
3859 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 3860 | if (r) |
f0d66275 | 3861 | goto set_irqchip_out; |
1fe779f8 | 3862 | r = 0; |
f0d66275 DH |
3863 | set_irqchip_out: |
3864 | kfree(chip); | |
1fe779f8 CO |
3865 | break; |
3866 | } | |
e0f63cb9 | 3867 | case KVM_GET_PIT: { |
e0f63cb9 | 3868 | r = -EFAULT; |
f0d66275 | 3869 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3870 | goto out; |
3871 | r = -ENXIO; | |
3872 | if (!kvm->arch.vpit) | |
3873 | goto out; | |
f0d66275 | 3874 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
3875 | if (r) |
3876 | goto out; | |
3877 | r = -EFAULT; | |
f0d66275 | 3878 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3879 | goto out; |
3880 | r = 0; | |
3881 | break; | |
3882 | } | |
3883 | case KVM_SET_PIT: { | |
e0f63cb9 | 3884 | r = -EFAULT; |
f0d66275 | 3885 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
3886 | goto out; |
3887 | r = -ENXIO; | |
3888 | if (!kvm->arch.vpit) | |
3889 | goto out; | |
f0d66275 | 3890 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
3891 | break; |
3892 | } | |
e9f42757 BK |
3893 | case KVM_GET_PIT2: { |
3894 | r = -ENXIO; | |
3895 | if (!kvm->arch.vpit) | |
3896 | goto out; | |
3897 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
3898 | if (r) | |
3899 | goto out; | |
3900 | r = -EFAULT; | |
3901 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
3902 | goto out; | |
3903 | r = 0; | |
3904 | break; | |
3905 | } | |
3906 | case KVM_SET_PIT2: { | |
3907 | r = -EFAULT; | |
3908 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
3909 | goto out; | |
3910 | r = -ENXIO; | |
3911 | if (!kvm->arch.vpit) | |
3912 | goto out; | |
3913 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
e9f42757 BK |
3914 | break; |
3915 | } | |
52d939a0 MT |
3916 | case KVM_REINJECT_CONTROL: { |
3917 | struct kvm_reinject_control control; | |
3918 | r = -EFAULT; | |
3919 | if (copy_from_user(&control, argp, sizeof(control))) | |
3920 | goto out; | |
3921 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
52d939a0 MT |
3922 | break; |
3923 | } | |
ffde22ac ES |
3924 | case KVM_XEN_HVM_CONFIG: { |
3925 | r = -EFAULT; | |
3926 | if (copy_from_user(&kvm->arch.xen_hvm_config, argp, | |
3927 | sizeof(struct kvm_xen_hvm_config))) | |
3928 | goto out; | |
3929 | r = -EINVAL; | |
3930 | if (kvm->arch.xen_hvm_config.flags) | |
3931 | goto out; | |
3932 | r = 0; | |
3933 | break; | |
3934 | } | |
afbcf7ab | 3935 | case KVM_SET_CLOCK: { |
afbcf7ab GC |
3936 | struct kvm_clock_data user_ns; |
3937 | u64 now_ns; | |
3938 | s64 delta; | |
3939 | ||
3940 | r = -EFAULT; | |
3941 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
3942 | goto out; | |
3943 | ||
3944 | r = -EINVAL; | |
3945 | if (user_ns.flags) | |
3946 | goto out; | |
3947 | ||
3948 | r = 0; | |
395c6b0a | 3949 | local_irq_disable(); |
759379dd | 3950 | now_ns = get_kernel_ns(); |
afbcf7ab | 3951 | delta = user_ns.clock - now_ns; |
395c6b0a | 3952 | local_irq_enable(); |
afbcf7ab | 3953 | kvm->arch.kvmclock_offset = delta; |
2e762ff7 | 3954 | kvm_gen_update_masterclock(kvm); |
afbcf7ab GC |
3955 | break; |
3956 | } | |
3957 | case KVM_GET_CLOCK: { | |
afbcf7ab GC |
3958 | struct kvm_clock_data user_ns; |
3959 | u64 now_ns; | |
3960 | ||
395c6b0a | 3961 | local_irq_disable(); |
759379dd | 3962 | now_ns = get_kernel_ns(); |
afbcf7ab | 3963 | user_ns.clock = kvm->arch.kvmclock_offset + now_ns; |
395c6b0a | 3964 | local_irq_enable(); |
afbcf7ab | 3965 | user_ns.flags = 0; |
97e69aa6 | 3966 | memset(&user_ns.pad, 0, sizeof(user_ns.pad)); |
afbcf7ab GC |
3967 | |
3968 | r = -EFAULT; | |
3969 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
3970 | goto out; | |
3971 | r = 0; | |
3972 | break; | |
3973 | } | |
3974 | ||
1fe779f8 CO |
3975 | default: |
3976 | ; | |
3977 | } | |
3978 | out: | |
3979 | return r; | |
3980 | } | |
3981 | ||
a16b043c | 3982 | static void kvm_init_msr_list(void) |
043405e1 CO |
3983 | { |
3984 | u32 dummy[2]; | |
3985 | unsigned i, j; | |
3986 | ||
e3267cbb GC |
3987 | /* skip the first msrs in the list. KVM-specific */ |
3988 | for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) { | |
043405e1 CO |
3989 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
3990 | continue; | |
93c4adc7 PB |
3991 | |
3992 | /* | |
3993 | * Even MSRs that are valid in the host may not be exposed | |
3994 | * to the guests in some cases. We could work around this | |
3995 | * in VMX with the generic MSR save/load machinery, but it | |
3996 | * is not really worthwhile since it will really only | |
3997 | * happen with nested virtualization. | |
3998 | */ | |
3999 | switch (msrs_to_save[i]) { | |
4000 | case MSR_IA32_BNDCFGS: | |
4001 | if (!kvm_x86_ops->mpx_supported()) | |
4002 | continue; | |
4003 | break; | |
4004 | default: | |
4005 | break; | |
4006 | } | |
4007 | ||
043405e1 CO |
4008 | if (j < i) |
4009 | msrs_to_save[j] = msrs_to_save[i]; | |
4010 | j++; | |
4011 | } | |
4012 | num_msrs_to_save = j; | |
4013 | } | |
4014 | ||
bda9020e MT |
4015 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
4016 | const void *v) | |
bbd9b64e | 4017 | { |
70252a10 AK |
4018 | int handled = 0; |
4019 | int n; | |
4020 | ||
4021 | do { | |
4022 | n = min(len, 8); | |
4023 | if (!(vcpu->arch.apic && | |
4024 | !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, n, v)) | |
4025 | && kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, n, v)) | |
4026 | break; | |
4027 | handled += n; | |
4028 | addr += n; | |
4029 | len -= n; | |
4030 | v += n; | |
4031 | } while (len); | |
bbd9b64e | 4032 | |
70252a10 | 4033 | return handled; |
bbd9b64e CO |
4034 | } |
4035 | ||
bda9020e | 4036 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 4037 | { |
70252a10 AK |
4038 | int handled = 0; |
4039 | int n; | |
4040 | ||
4041 | do { | |
4042 | n = min(len, 8); | |
4043 | if (!(vcpu->arch.apic && | |
4044 | !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, n, v)) | |
4045 | && kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, n, v)) | |
4046 | break; | |
4047 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, *(u64 *)v); | |
4048 | handled += n; | |
4049 | addr += n; | |
4050 | len -= n; | |
4051 | v += n; | |
4052 | } while (len); | |
bbd9b64e | 4053 | |
70252a10 | 4054 | return handled; |
bbd9b64e CO |
4055 | } |
4056 | ||
2dafc6c2 GN |
4057 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
4058 | struct kvm_segment *var, int seg) | |
4059 | { | |
4060 | kvm_x86_ops->set_segment(vcpu, var, seg); | |
4061 | } | |
4062 | ||
4063 | void kvm_get_segment(struct kvm_vcpu *vcpu, | |
4064 | struct kvm_segment *var, int seg) | |
4065 | { | |
4066 | kvm_x86_ops->get_segment(vcpu, var, seg); | |
4067 | } | |
4068 | ||
54987b7a PB |
4069 | gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, |
4070 | struct x86_exception *exception) | |
02f59dc9 JR |
4071 | { |
4072 | gpa_t t_gpa; | |
02f59dc9 JR |
4073 | |
4074 | BUG_ON(!mmu_is_nested(vcpu)); | |
4075 | ||
4076 | /* NPT walks are always user-walks */ | |
4077 | access |= PFERR_USER_MASK; | |
54987b7a | 4078 | t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, exception); |
02f59dc9 JR |
4079 | |
4080 | return t_gpa; | |
4081 | } | |
4082 | ||
ab9ae313 AK |
4083 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, |
4084 | struct x86_exception *exception) | |
1871c602 GN |
4085 | { |
4086 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
ab9ae313 | 4087 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4088 | } |
4089 | ||
ab9ae313 AK |
4090 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, |
4091 | struct x86_exception *exception) | |
1871c602 GN |
4092 | { |
4093 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
4094 | access |= PFERR_FETCH_MASK; | |
ab9ae313 | 4095 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4096 | } |
4097 | ||
ab9ae313 AK |
4098 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, |
4099 | struct x86_exception *exception) | |
1871c602 GN |
4100 | { |
4101 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
4102 | access |= PFERR_WRITE_MASK; | |
ab9ae313 | 4103 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4104 | } |
4105 | ||
4106 | /* uses this to access any guest's mapped memory without checking CPL */ | |
ab9ae313 AK |
4107 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, |
4108 | struct x86_exception *exception) | |
1871c602 | 4109 | { |
ab9ae313 | 4110 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception); |
1871c602 GN |
4111 | } |
4112 | ||
4113 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
4114 | struct kvm_vcpu *vcpu, u32 access, | |
bcc55cba | 4115 | struct x86_exception *exception) |
bbd9b64e CO |
4116 | { |
4117 | void *data = val; | |
10589a46 | 4118 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
4119 | |
4120 | while (bytes) { | |
14dfe855 | 4121 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access, |
ab9ae313 | 4122 | exception); |
bbd9b64e | 4123 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 4124 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
4125 | int ret; |
4126 | ||
bcc55cba | 4127 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4128 | return X86EMUL_PROPAGATE_FAULT; |
44583cba PB |
4129 | ret = kvm_read_guest_page(vcpu->kvm, gpa >> PAGE_SHIFT, data, |
4130 | offset, toread); | |
10589a46 | 4131 | if (ret < 0) { |
c3cd7ffa | 4132 | r = X86EMUL_IO_NEEDED; |
10589a46 MT |
4133 | goto out; |
4134 | } | |
bbd9b64e | 4135 | |
77c2002e IE |
4136 | bytes -= toread; |
4137 | data += toread; | |
4138 | addr += toread; | |
bbd9b64e | 4139 | } |
10589a46 | 4140 | out: |
10589a46 | 4141 | return r; |
bbd9b64e | 4142 | } |
77c2002e | 4143 | |
1871c602 | 4144 | /* used for instruction fetching */ |
0f65dd70 AK |
4145 | static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt, |
4146 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4147 | struct x86_exception *exception) |
1871c602 | 4148 | { |
0f65dd70 | 4149 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4150 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
44583cba PB |
4151 | unsigned offset; |
4152 | int ret; | |
0f65dd70 | 4153 | |
44583cba PB |
4154 | /* Inline kvm_read_guest_virt_helper for speed. */ |
4155 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access|PFERR_FETCH_MASK, | |
4156 | exception); | |
4157 | if (unlikely(gpa == UNMAPPED_GVA)) | |
4158 | return X86EMUL_PROPAGATE_FAULT; | |
4159 | ||
4160 | offset = addr & (PAGE_SIZE-1); | |
4161 | if (WARN_ON(offset + bytes > PAGE_SIZE)) | |
4162 | bytes = (unsigned)PAGE_SIZE - offset; | |
4163 | ret = kvm_read_guest_page(vcpu->kvm, gpa >> PAGE_SHIFT, val, | |
4164 | offset, bytes); | |
4165 | if (unlikely(ret < 0)) | |
4166 | return X86EMUL_IO_NEEDED; | |
4167 | ||
4168 | return X86EMUL_CONTINUE; | |
1871c602 GN |
4169 | } |
4170 | ||
064aea77 | 4171 | int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4172 | gva_t addr, void *val, unsigned int bytes, |
bcc55cba | 4173 | struct x86_exception *exception) |
1871c602 | 4174 | { |
0f65dd70 | 4175 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4176 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
0f65dd70 | 4177 | |
1871c602 | 4178 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, |
bcc55cba | 4179 | exception); |
1871c602 | 4180 | } |
064aea77 | 4181 | EXPORT_SYMBOL_GPL(kvm_read_guest_virt); |
1871c602 | 4182 | |
0f65dd70 AK |
4183 | static int kvm_read_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
4184 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4185 | struct x86_exception *exception) |
1871c602 | 4186 | { |
0f65dd70 | 4187 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
bcc55cba | 4188 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception); |
1871c602 GN |
4189 | } |
4190 | ||
6a4d7550 | 4191 | int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4192 | gva_t addr, void *val, |
2dafc6c2 | 4193 | unsigned int bytes, |
bcc55cba | 4194 | struct x86_exception *exception) |
77c2002e | 4195 | { |
0f65dd70 | 4196 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
77c2002e IE |
4197 | void *data = val; |
4198 | int r = X86EMUL_CONTINUE; | |
4199 | ||
4200 | while (bytes) { | |
14dfe855 JR |
4201 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, |
4202 | PFERR_WRITE_MASK, | |
ab9ae313 | 4203 | exception); |
77c2002e IE |
4204 | unsigned offset = addr & (PAGE_SIZE-1); |
4205 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
4206 | int ret; | |
4207 | ||
bcc55cba | 4208 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4209 | return X86EMUL_PROPAGATE_FAULT; |
77c2002e IE |
4210 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); |
4211 | if (ret < 0) { | |
c3cd7ffa | 4212 | r = X86EMUL_IO_NEEDED; |
77c2002e IE |
4213 | goto out; |
4214 | } | |
4215 | ||
4216 | bytes -= towrite; | |
4217 | data += towrite; | |
4218 | addr += towrite; | |
4219 | } | |
4220 | out: | |
4221 | return r; | |
4222 | } | |
6a4d7550 | 4223 | EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system); |
77c2002e | 4224 | |
af7cc7d1 XG |
4225 | static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva, |
4226 | gpa_t *gpa, struct x86_exception *exception, | |
4227 | bool write) | |
4228 | { | |
97d64b78 AK |
4229 | u32 access = ((kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0) |
4230 | | (write ? PFERR_WRITE_MASK : 0); | |
af7cc7d1 | 4231 | |
97d64b78 | 4232 | if (vcpu_match_mmio_gva(vcpu, gva) |
97ec8c06 FW |
4233 | && !permission_fault(vcpu, vcpu->arch.walk_mmu, |
4234 | vcpu->arch.access, access)) { | |
bebb106a XG |
4235 | *gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT | |
4236 | (gva & (PAGE_SIZE - 1)); | |
4f022648 | 4237 | trace_vcpu_match_mmio(gva, *gpa, write, false); |
bebb106a XG |
4238 | return 1; |
4239 | } | |
4240 | ||
af7cc7d1 XG |
4241 | *gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
4242 | ||
4243 | if (*gpa == UNMAPPED_GVA) | |
4244 | return -1; | |
4245 | ||
4246 | /* For APIC access vmexit */ | |
4247 | if ((*gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4248 | return 1; | |
4249 | ||
4f022648 XG |
4250 | if (vcpu_match_mmio_gpa(vcpu, *gpa)) { |
4251 | trace_vcpu_match_mmio(gva, *gpa, write, true); | |
bebb106a | 4252 | return 1; |
4f022648 | 4253 | } |
bebb106a | 4254 | |
af7cc7d1 XG |
4255 | return 0; |
4256 | } | |
4257 | ||
3200f405 | 4258 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
bcc55cba | 4259 | const void *val, int bytes) |
bbd9b64e CO |
4260 | { |
4261 | int ret; | |
4262 | ||
4263 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); | |
9f811285 | 4264 | if (ret < 0) |
bbd9b64e | 4265 | return 0; |
f57f2ef5 | 4266 | kvm_mmu_pte_write(vcpu, gpa, val, bytes); |
bbd9b64e CO |
4267 | return 1; |
4268 | } | |
4269 | ||
77d197b2 XG |
4270 | struct read_write_emulator_ops { |
4271 | int (*read_write_prepare)(struct kvm_vcpu *vcpu, void *val, | |
4272 | int bytes); | |
4273 | int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4274 | void *val, int bytes); | |
4275 | int (*read_write_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4276 | int bytes, void *val); | |
4277 | int (*read_write_exit_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4278 | void *val, int bytes); | |
4279 | bool write; | |
4280 | }; | |
4281 | ||
4282 | static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes) | |
4283 | { | |
4284 | if (vcpu->mmio_read_completed) { | |
77d197b2 | 4285 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
f78146b0 | 4286 | vcpu->mmio_fragments[0].gpa, *(u64 *)val); |
77d197b2 XG |
4287 | vcpu->mmio_read_completed = 0; |
4288 | return 1; | |
4289 | } | |
4290 | ||
4291 | return 0; | |
4292 | } | |
4293 | ||
4294 | static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4295 | void *val, int bytes) | |
4296 | { | |
4297 | return !kvm_read_guest(vcpu->kvm, gpa, val, bytes); | |
4298 | } | |
4299 | ||
4300 | static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4301 | void *val, int bytes) | |
4302 | { | |
4303 | return emulator_write_phys(vcpu, gpa, val, bytes); | |
4304 | } | |
4305 | ||
4306 | static int write_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val) | |
4307 | { | |
4308 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); | |
4309 | return vcpu_mmio_write(vcpu, gpa, bytes, val); | |
4310 | } | |
4311 | ||
4312 | static int read_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4313 | void *val, int bytes) | |
4314 | { | |
4315 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
4316 | return X86EMUL_IO_NEEDED; | |
4317 | } | |
4318 | ||
4319 | static int write_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4320 | void *val, int bytes) | |
4321 | { | |
f78146b0 AK |
4322 | struct kvm_mmio_fragment *frag = &vcpu->mmio_fragments[0]; |
4323 | ||
87da7e66 | 4324 | memcpy(vcpu->run->mmio.data, frag->data, min(8u, frag->len)); |
77d197b2 XG |
4325 | return X86EMUL_CONTINUE; |
4326 | } | |
4327 | ||
0fbe9b0b | 4328 | static const struct read_write_emulator_ops read_emultor = { |
77d197b2 XG |
4329 | .read_write_prepare = read_prepare, |
4330 | .read_write_emulate = read_emulate, | |
4331 | .read_write_mmio = vcpu_mmio_read, | |
4332 | .read_write_exit_mmio = read_exit_mmio, | |
4333 | }; | |
4334 | ||
0fbe9b0b | 4335 | static const struct read_write_emulator_ops write_emultor = { |
77d197b2 XG |
4336 | .read_write_emulate = write_emulate, |
4337 | .read_write_mmio = write_mmio, | |
4338 | .read_write_exit_mmio = write_exit_mmio, | |
4339 | .write = true, | |
4340 | }; | |
4341 | ||
22388a3c XG |
4342 | static int emulator_read_write_onepage(unsigned long addr, void *val, |
4343 | unsigned int bytes, | |
4344 | struct x86_exception *exception, | |
4345 | struct kvm_vcpu *vcpu, | |
0fbe9b0b | 4346 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 4347 | { |
af7cc7d1 XG |
4348 | gpa_t gpa; |
4349 | int handled, ret; | |
22388a3c | 4350 | bool write = ops->write; |
f78146b0 | 4351 | struct kvm_mmio_fragment *frag; |
10589a46 | 4352 | |
22388a3c | 4353 | ret = vcpu_mmio_gva_to_gpa(vcpu, addr, &gpa, exception, write); |
bbd9b64e | 4354 | |
af7cc7d1 | 4355 | if (ret < 0) |
bbd9b64e | 4356 | return X86EMUL_PROPAGATE_FAULT; |
bbd9b64e CO |
4357 | |
4358 | /* For APIC access vmexit */ | |
af7cc7d1 | 4359 | if (ret) |
bbd9b64e CO |
4360 | goto mmio; |
4361 | ||
22388a3c | 4362 | if (ops->read_write_emulate(vcpu, gpa, val, bytes)) |
bbd9b64e CO |
4363 | return X86EMUL_CONTINUE; |
4364 | ||
4365 | mmio: | |
4366 | /* | |
4367 | * Is this MMIO handled locally? | |
4368 | */ | |
22388a3c | 4369 | handled = ops->read_write_mmio(vcpu, gpa, bytes, val); |
70252a10 | 4370 | if (handled == bytes) |
bbd9b64e | 4371 | return X86EMUL_CONTINUE; |
bbd9b64e | 4372 | |
70252a10 AK |
4373 | gpa += handled; |
4374 | bytes -= handled; | |
4375 | val += handled; | |
4376 | ||
87da7e66 XG |
4377 | WARN_ON(vcpu->mmio_nr_fragments >= KVM_MAX_MMIO_FRAGMENTS); |
4378 | frag = &vcpu->mmio_fragments[vcpu->mmio_nr_fragments++]; | |
4379 | frag->gpa = gpa; | |
4380 | frag->data = val; | |
4381 | frag->len = bytes; | |
f78146b0 | 4382 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
4383 | } |
4384 | ||
22388a3c XG |
4385 | int emulator_read_write(struct x86_emulate_ctxt *ctxt, unsigned long addr, |
4386 | void *val, unsigned int bytes, | |
4387 | struct x86_exception *exception, | |
0fbe9b0b | 4388 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 4389 | { |
0f65dd70 | 4390 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
f78146b0 AK |
4391 | gpa_t gpa; |
4392 | int rc; | |
4393 | ||
4394 | if (ops->read_write_prepare && | |
4395 | ops->read_write_prepare(vcpu, val, bytes)) | |
4396 | return X86EMUL_CONTINUE; | |
4397 | ||
4398 | vcpu->mmio_nr_fragments = 0; | |
0f65dd70 | 4399 | |
bbd9b64e CO |
4400 | /* Crossing a page boundary? */ |
4401 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
f78146b0 | 4402 | int now; |
bbd9b64e CO |
4403 | |
4404 | now = -addr & ~PAGE_MASK; | |
22388a3c XG |
4405 | rc = emulator_read_write_onepage(addr, val, now, exception, |
4406 | vcpu, ops); | |
4407 | ||
bbd9b64e CO |
4408 | if (rc != X86EMUL_CONTINUE) |
4409 | return rc; | |
4410 | addr += now; | |
4411 | val += now; | |
4412 | bytes -= now; | |
4413 | } | |
22388a3c | 4414 | |
f78146b0 AK |
4415 | rc = emulator_read_write_onepage(addr, val, bytes, exception, |
4416 | vcpu, ops); | |
4417 | if (rc != X86EMUL_CONTINUE) | |
4418 | return rc; | |
4419 | ||
4420 | if (!vcpu->mmio_nr_fragments) | |
4421 | return rc; | |
4422 | ||
4423 | gpa = vcpu->mmio_fragments[0].gpa; | |
4424 | ||
4425 | vcpu->mmio_needed = 1; | |
4426 | vcpu->mmio_cur_fragment = 0; | |
4427 | ||
87da7e66 | 4428 | vcpu->run->mmio.len = min(8u, vcpu->mmio_fragments[0].len); |
f78146b0 AK |
4429 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = ops->write; |
4430 | vcpu->run->exit_reason = KVM_EXIT_MMIO; | |
4431 | vcpu->run->mmio.phys_addr = gpa; | |
4432 | ||
4433 | return ops->read_write_exit_mmio(vcpu, gpa, val, bytes); | |
22388a3c XG |
4434 | } |
4435 | ||
4436 | static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt, | |
4437 | unsigned long addr, | |
4438 | void *val, | |
4439 | unsigned int bytes, | |
4440 | struct x86_exception *exception) | |
4441 | { | |
4442 | return emulator_read_write(ctxt, addr, val, bytes, | |
4443 | exception, &read_emultor); | |
4444 | } | |
4445 | ||
4446 | int emulator_write_emulated(struct x86_emulate_ctxt *ctxt, | |
4447 | unsigned long addr, | |
4448 | const void *val, | |
4449 | unsigned int bytes, | |
4450 | struct x86_exception *exception) | |
4451 | { | |
4452 | return emulator_read_write(ctxt, addr, (void *)val, bytes, | |
4453 | exception, &write_emultor); | |
bbd9b64e | 4454 | } |
bbd9b64e | 4455 | |
daea3e73 AK |
4456 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
4457 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) | |
4458 | ||
4459 | #ifdef CONFIG_X86_64 | |
4460 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) | |
4461 | #else | |
4462 | # define CMPXCHG64(ptr, old, new) \ | |
9749a6c0 | 4463 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
daea3e73 AK |
4464 | #endif |
4465 | ||
0f65dd70 AK |
4466 | static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, |
4467 | unsigned long addr, | |
bbd9b64e CO |
4468 | const void *old, |
4469 | const void *new, | |
4470 | unsigned int bytes, | |
0f65dd70 | 4471 | struct x86_exception *exception) |
bbd9b64e | 4472 | { |
0f65dd70 | 4473 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
daea3e73 AK |
4474 | gpa_t gpa; |
4475 | struct page *page; | |
4476 | char *kaddr; | |
4477 | bool exchanged; | |
2bacc55c | 4478 | |
daea3e73 AK |
4479 | /* guests cmpxchg8b have to be emulated atomically */ |
4480 | if (bytes > 8 || (bytes & (bytes - 1))) | |
4481 | goto emul_write; | |
10589a46 | 4482 | |
daea3e73 | 4483 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
2bacc55c | 4484 | |
daea3e73 AK |
4485 | if (gpa == UNMAPPED_GVA || |
4486 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4487 | goto emul_write; | |
2bacc55c | 4488 | |
daea3e73 AK |
4489 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
4490 | goto emul_write; | |
72dc67a6 | 4491 | |
daea3e73 | 4492 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
32cad84f | 4493 | if (is_error_page(page)) |
c19b8bd6 | 4494 | goto emul_write; |
72dc67a6 | 4495 | |
8fd75e12 | 4496 | kaddr = kmap_atomic(page); |
daea3e73 AK |
4497 | kaddr += offset_in_page(gpa); |
4498 | switch (bytes) { | |
4499 | case 1: | |
4500 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); | |
4501 | break; | |
4502 | case 2: | |
4503 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); | |
4504 | break; | |
4505 | case 4: | |
4506 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); | |
4507 | break; | |
4508 | case 8: | |
4509 | exchanged = CMPXCHG64(kaddr, old, new); | |
4510 | break; | |
4511 | default: | |
4512 | BUG(); | |
2bacc55c | 4513 | } |
8fd75e12 | 4514 | kunmap_atomic(kaddr); |
daea3e73 AK |
4515 | kvm_release_page_dirty(page); |
4516 | ||
4517 | if (!exchanged) | |
4518 | return X86EMUL_CMPXCHG_FAILED; | |
4519 | ||
d3714010 | 4520 | mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT); |
f57f2ef5 | 4521 | kvm_mmu_pte_write(vcpu, gpa, new, bytes); |
8f6abd06 GN |
4522 | |
4523 | return X86EMUL_CONTINUE; | |
4a5f48f6 | 4524 | |
3200f405 | 4525 | emul_write: |
daea3e73 | 4526 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c | 4527 | |
0f65dd70 | 4528 | return emulator_write_emulated(ctxt, addr, new, bytes, exception); |
bbd9b64e CO |
4529 | } |
4530 | ||
cf8f70bf GN |
4531 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
4532 | { | |
4533 | /* TODO: String I/O for in kernel device */ | |
4534 | int r; | |
4535 | ||
4536 | if (vcpu->arch.pio.in) | |
4537 | r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port, | |
4538 | vcpu->arch.pio.size, pd); | |
4539 | else | |
4540 | r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS, | |
4541 | vcpu->arch.pio.port, vcpu->arch.pio.size, | |
4542 | pd); | |
4543 | return r; | |
4544 | } | |
4545 | ||
6f6fbe98 XG |
4546 | static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size, |
4547 | unsigned short port, void *val, | |
4548 | unsigned int count, bool in) | |
cf8f70bf | 4549 | { |
cf8f70bf | 4550 | vcpu->arch.pio.port = port; |
6f6fbe98 | 4551 | vcpu->arch.pio.in = in; |
7972995b | 4552 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
4553 | vcpu->arch.pio.size = size; |
4554 | ||
4555 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
7972995b | 4556 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4557 | return 1; |
4558 | } | |
4559 | ||
4560 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
6f6fbe98 | 4561 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; |
cf8f70bf GN |
4562 | vcpu->run->io.size = size; |
4563 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
4564 | vcpu->run->io.count = count; | |
4565 | vcpu->run->io.port = port; | |
4566 | ||
4567 | return 0; | |
4568 | } | |
4569 | ||
6f6fbe98 XG |
4570 | static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt, |
4571 | int size, unsigned short port, void *val, | |
4572 | unsigned int count) | |
cf8f70bf | 4573 | { |
ca1d4a9e | 4574 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
6f6fbe98 | 4575 | int ret; |
ca1d4a9e | 4576 | |
6f6fbe98 XG |
4577 | if (vcpu->arch.pio.count) |
4578 | goto data_avail; | |
cf8f70bf | 4579 | |
6f6fbe98 XG |
4580 | ret = emulator_pio_in_out(vcpu, size, port, val, count, true); |
4581 | if (ret) { | |
4582 | data_avail: | |
4583 | memcpy(val, vcpu->arch.pio_data, size * count); | |
1171903d | 4584 | trace_kvm_pio(KVM_PIO_IN, port, size, count, vcpu->arch.pio_data); |
7972995b | 4585 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4586 | return 1; |
4587 | } | |
4588 | ||
cf8f70bf GN |
4589 | return 0; |
4590 | } | |
4591 | ||
6f6fbe98 XG |
4592 | static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt, |
4593 | int size, unsigned short port, | |
4594 | const void *val, unsigned int count) | |
4595 | { | |
4596 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4597 | ||
4598 | memcpy(vcpu->arch.pio_data, val, size * count); | |
1171903d | 4599 | trace_kvm_pio(KVM_PIO_OUT, port, size, count, vcpu->arch.pio_data); |
6f6fbe98 XG |
4600 | return emulator_pio_in_out(vcpu, size, port, (void *)val, count, false); |
4601 | } | |
4602 | ||
bbd9b64e CO |
4603 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
4604 | { | |
4605 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
4606 | } | |
4607 | ||
3cb16fe7 | 4608 | static void emulator_invlpg(struct x86_emulate_ctxt *ctxt, ulong address) |
bbd9b64e | 4609 | { |
3cb16fe7 | 4610 | kvm_mmu_invlpg(emul_to_vcpu(ctxt), address); |
bbd9b64e CO |
4611 | } |
4612 | ||
f5f48ee1 SY |
4613 | int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu) |
4614 | { | |
4615 | if (!need_emulate_wbinvd(vcpu)) | |
4616 | return X86EMUL_CONTINUE; | |
4617 | ||
4618 | if (kvm_x86_ops->has_wbinvd_exit()) { | |
2eec7343 JK |
4619 | int cpu = get_cpu(); |
4620 | ||
4621 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
f5f48ee1 SY |
4622 | smp_call_function_many(vcpu->arch.wbinvd_dirty_mask, |
4623 | wbinvd_ipi, NULL, 1); | |
2eec7343 | 4624 | put_cpu(); |
f5f48ee1 | 4625 | cpumask_clear(vcpu->arch.wbinvd_dirty_mask); |
2eec7343 JK |
4626 | } else |
4627 | wbinvd(); | |
f5f48ee1 SY |
4628 | return X86EMUL_CONTINUE; |
4629 | } | |
4630 | EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd); | |
4631 | ||
bcaf5cc5 AK |
4632 | static void emulator_wbinvd(struct x86_emulate_ctxt *ctxt) |
4633 | { | |
4634 | kvm_emulate_wbinvd(emul_to_vcpu(ctxt)); | |
4635 | } | |
4636 | ||
717746e3 | 4637 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) |
bbd9b64e | 4638 | { |
717746e3 | 4639 | return _kvm_get_dr(emul_to_vcpu(ctxt), dr, dest); |
bbd9b64e CO |
4640 | } |
4641 | ||
717746e3 | 4642 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) |
bbd9b64e | 4643 | { |
338dbc97 | 4644 | |
717746e3 | 4645 | return __kvm_set_dr(emul_to_vcpu(ctxt), dr, value); |
bbd9b64e CO |
4646 | } |
4647 | ||
52a46617 | 4648 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
5fdbf976 | 4649 | { |
52a46617 | 4650 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
5fdbf976 MT |
4651 | } |
4652 | ||
717746e3 | 4653 | static unsigned long emulator_get_cr(struct x86_emulate_ctxt *ctxt, int cr) |
bbd9b64e | 4654 | { |
717746e3 | 4655 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
52a46617 GN |
4656 | unsigned long value; |
4657 | ||
4658 | switch (cr) { | |
4659 | case 0: | |
4660 | value = kvm_read_cr0(vcpu); | |
4661 | break; | |
4662 | case 2: | |
4663 | value = vcpu->arch.cr2; | |
4664 | break; | |
4665 | case 3: | |
9f8fe504 | 4666 | value = kvm_read_cr3(vcpu); |
52a46617 GN |
4667 | break; |
4668 | case 4: | |
4669 | value = kvm_read_cr4(vcpu); | |
4670 | break; | |
4671 | case 8: | |
4672 | value = kvm_get_cr8(vcpu); | |
4673 | break; | |
4674 | default: | |
a737f256 | 4675 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
52a46617 GN |
4676 | return 0; |
4677 | } | |
4678 | ||
4679 | return value; | |
4680 | } | |
4681 | ||
717746e3 | 4682 | static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val) |
52a46617 | 4683 | { |
717746e3 | 4684 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
0f12244f GN |
4685 | int res = 0; |
4686 | ||
52a46617 GN |
4687 | switch (cr) { |
4688 | case 0: | |
49a9b07e | 4689 | res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
52a46617 GN |
4690 | break; |
4691 | case 2: | |
4692 | vcpu->arch.cr2 = val; | |
4693 | break; | |
4694 | case 3: | |
2390218b | 4695 | res = kvm_set_cr3(vcpu, val); |
52a46617 GN |
4696 | break; |
4697 | case 4: | |
a83b29c6 | 4698 | res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
52a46617 GN |
4699 | break; |
4700 | case 8: | |
eea1cff9 | 4701 | res = kvm_set_cr8(vcpu, val); |
52a46617 GN |
4702 | break; |
4703 | default: | |
a737f256 | 4704 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
0f12244f | 4705 | res = -1; |
52a46617 | 4706 | } |
0f12244f GN |
4707 | |
4708 | return res; | |
52a46617 GN |
4709 | } |
4710 | ||
717746e3 | 4711 | static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt) |
9c537244 | 4712 | { |
717746e3 | 4713 | return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt)); |
9c537244 GN |
4714 | } |
4715 | ||
4bff1e86 | 4716 | static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
2dafc6c2 | 4717 | { |
4bff1e86 | 4718 | kvm_x86_ops->get_gdt(emul_to_vcpu(ctxt), dt); |
2dafc6c2 GN |
4719 | } |
4720 | ||
4bff1e86 | 4721 | static void emulator_get_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
160ce1f1 | 4722 | { |
4bff1e86 | 4723 | kvm_x86_ops->get_idt(emul_to_vcpu(ctxt), dt); |
160ce1f1 MG |
4724 | } |
4725 | ||
1ac9d0cf AK |
4726 | static void emulator_set_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
4727 | { | |
4728 | kvm_x86_ops->set_gdt(emul_to_vcpu(ctxt), dt); | |
4729 | } | |
4730 | ||
4731 | static void emulator_set_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) | |
4732 | { | |
4733 | kvm_x86_ops->set_idt(emul_to_vcpu(ctxt), dt); | |
4734 | } | |
4735 | ||
4bff1e86 AK |
4736 | static unsigned long emulator_get_cached_segment_base( |
4737 | struct x86_emulate_ctxt *ctxt, int seg) | |
5951c442 | 4738 | { |
4bff1e86 | 4739 | return get_segment_base(emul_to_vcpu(ctxt), seg); |
5951c442 GN |
4740 | } |
4741 | ||
1aa36616 AK |
4742 | static bool emulator_get_segment(struct x86_emulate_ctxt *ctxt, u16 *selector, |
4743 | struct desc_struct *desc, u32 *base3, | |
4744 | int seg) | |
2dafc6c2 GN |
4745 | { |
4746 | struct kvm_segment var; | |
4747 | ||
4bff1e86 | 4748 | kvm_get_segment(emul_to_vcpu(ctxt), &var, seg); |
1aa36616 | 4749 | *selector = var.selector; |
2dafc6c2 | 4750 | |
378a8b09 GN |
4751 | if (var.unusable) { |
4752 | memset(desc, 0, sizeof(*desc)); | |
2dafc6c2 | 4753 | return false; |
378a8b09 | 4754 | } |
2dafc6c2 GN |
4755 | |
4756 | if (var.g) | |
4757 | var.limit >>= 12; | |
4758 | set_desc_limit(desc, var.limit); | |
4759 | set_desc_base(desc, (unsigned long)var.base); | |
5601d05b GN |
4760 | #ifdef CONFIG_X86_64 |
4761 | if (base3) | |
4762 | *base3 = var.base >> 32; | |
4763 | #endif | |
2dafc6c2 GN |
4764 | desc->type = var.type; |
4765 | desc->s = var.s; | |
4766 | desc->dpl = var.dpl; | |
4767 | desc->p = var.present; | |
4768 | desc->avl = var.avl; | |
4769 | desc->l = var.l; | |
4770 | desc->d = var.db; | |
4771 | desc->g = var.g; | |
4772 | ||
4773 | return true; | |
4774 | } | |
4775 | ||
1aa36616 AK |
4776 | static void emulator_set_segment(struct x86_emulate_ctxt *ctxt, u16 selector, |
4777 | struct desc_struct *desc, u32 base3, | |
4778 | int seg) | |
2dafc6c2 | 4779 | { |
4bff1e86 | 4780 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
2dafc6c2 GN |
4781 | struct kvm_segment var; |
4782 | ||
1aa36616 | 4783 | var.selector = selector; |
2dafc6c2 | 4784 | var.base = get_desc_base(desc); |
5601d05b GN |
4785 | #ifdef CONFIG_X86_64 |
4786 | var.base |= ((u64)base3) << 32; | |
4787 | #endif | |
2dafc6c2 GN |
4788 | var.limit = get_desc_limit(desc); |
4789 | if (desc->g) | |
4790 | var.limit = (var.limit << 12) | 0xfff; | |
4791 | var.type = desc->type; | |
2dafc6c2 GN |
4792 | var.dpl = desc->dpl; |
4793 | var.db = desc->d; | |
4794 | var.s = desc->s; | |
4795 | var.l = desc->l; | |
4796 | var.g = desc->g; | |
4797 | var.avl = desc->avl; | |
4798 | var.present = desc->p; | |
4799 | var.unusable = !var.present; | |
4800 | var.padding = 0; | |
4801 | ||
4802 | kvm_set_segment(vcpu, &var, seg); | |
4803 | return; | |
4804 | } | |
4805 | ||
717746e3 AK |
4806 | static int emulator_get_msr(struct x86_emulate_ctxt *ctxt, |
4807 | u32 msr_index, u64 *pdata) | |
4808 | { | |
4809 | return kvm_get_msr(emul_to_vcpu(ctxt), msr_index, pdata); | |
4810 | } | |
4811 | ||
4812 | static int emulator_set_msr(struct x86_emulate_ctxt *ctxt, | |
4813 | u32 msr_index, u64 data) | |
4814 | { | |
8fe8ab46 WA |
4815 | struct msr_data msr; |
4816 | ||
4817 | msr.data = data; | |
4818 | msr.index = msr_index; | |
4819 | msr.host_initiated = false; | |
4820 | return kvm_set_msr(emul_to_vcpu(ctxt), &msr); | |
717746e3 AK |
4821 | } |
4822 | ||
67f4d428 NA |
4823 | static int emulator_check_pmc(struct x86_emulate_ctxt *ctxt, |
4824 | u32 pmc) | |
4825 | { | |
4826 | return kvm_pmu_check_pmc(emul_to_vcpu(ctxt), pmc); | |
4827 | } | |
4828 | ||
222d21aa AK |
4829 | static int emulator_read_pmc(struct x86_emulate_ctxt *ctxt, |
4830 | u32 pmc, u64 *pdata) | |
4831 | { | |
4832 | return kvm_pmu_read_pmc(emul_to_vcpu(ctxt), pmc, pdata); | |
4833 | } | |
4834 | ||
6c3287f7 AK |
4835 | static void emulator_halt(struct x86_emulate_ctxt *ctxt) |
4836 | { | |
4837 | emul_to_vcpu(ctxt)->arch.halt_request = 1; | |
4838 | } | |
4839 | ||
5037f6f3 AK |
4840 | static void emulator_get_fpu(struct x86_emulate_ctxt *ctxt) |
4841 | { | |
4842 | preempt_disable(); | |
5197b808 | 4843 | kvm_load_guest_fpu(emul_to_vcpu(ctxt)); |
5037f6f3 AK |
4844 | /* |
4845 | * CR0.TS may reference the host fpu state, not the guest fpu state, | |
4846 | * so it may be clear at this point. | |
4847 | */ | |
4848 | clts(); | |
4849 | } | |
4850 | ||
4851 | static void emulator_put_fpu(struct x86_emulate_ctxt *ctxt) | |
4852 | { | |
4853 | preempt_enable(); | |
4854 | } | |
4855 | ||
2953538e | 4856 | static int emulator_intercept(struct x86_emulate_ctxt *ctxt, |
8a76d7f2 | 4857 | struct x86_instruction_info *info, |
c4f035c6 AK |
4858 | enum x86_intercept_stage stage) |
4859 | { | |
2953538e | 4860 | return kvm_x86_ops->check_intercept(emul_to_vcpu(ctxt), info, stage); |
c4f035c6 AK |
4861 | } |
4862 | ||
0017f93a | 4863 | static void emulator_get_cpuid(struct x86_emulate_ctxt *ctxt, |
bdb42f5a SB |
4864 | u32 *eax, u32 *ebx, u32 *ecx, u32 *edx) |
4865 | { | |
0017f93a | 4866 | kvm_cpuid(emul_to_vcpu(ctxt), eax, ebx, ecx, edx); |
bdb42f5a SB |
4867 | } |
4868 | ||
dd856efa AK |
4869 | static ulong emulator_read_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg) |
4870 | { | |
4871 | return kvm_register_read(emul_to_vcpu(ctxt), reg); | |
4872 | } | |
4873 | ||
4874 | static void emulator_write_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg, ulong val) | |
4875 | { | |
4876 | kvm_register_write(emul_to_vcpu(ctxt), reg, val); | |
4877 | } | |
4878 | ||
0225fb50 | 4879 | static const struct x86_emulate_ops emulate_ops = { |
dd856efa AK |
4880 | .read_gpr = emulator_read_gpr, |
4881 | .write_gpr = emulator_write_gpr, | |
1871c602 | 4882 | .read_std = kvm_read_guest_virt_system, |
2dafc6c2 | 4883 | .write_std = kvm_write_guest_virt_system, |
1871c602 | 4884 | .fetch = kvm_fetch_guest_virt, |
bbd9b64e CO |
4885 | .read_emulated = emulator_read_emulated, |
4886 | .write_emulated = emulator_write_emulated, | |
4887 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
3cb16fe7 | 4888 | .invlpg = emulator_invlpg, |
cf8f70bf GN |
4889 | .pio_in_emulated = emulator_pio_in_emulated, |
4890 | .pio_out_emulated = emulator_pio_out_emulated, | |
1aa36616 AK |
4891 | .get_segment = emulator_get_segment, |
4892 | .set_segment = emulator_set_segment, | |
5951c442 | 4893 | .get_cached_segment_base = emulator_get_cached_segment_base, |
2dafc6c2 | 4894 | .get_gdt = emulator_get_gdt, |
160ce1f1 | 4895 | .get_idt = emulator_get_idt, |
1ac9d0cf AK |
4896 | .set_gdt = emulator_set_gdt, |
4897 | .set_idt = emulator_set_idt, | |
52a46617 GN |
4898 | .get_cr = emulator_get_cr, |
4899 | .set_cr = emulator_set_cr, | |
9c537244 | 4900 | .cpl = emulator_get_cpl, |
35aa5375 GN |
4901 | .get_dr = emulator_get_dr, |
4902 | .set_dr = emulator_set_dr, | |
717746e3 AK |
4903 | .set_msr = emulator_set_msr, |
4904 | .get_msr = emulator_get_msr, | |
67f4d428 | 4905 | .check_pmc = emulator_check_pmc, |
222d21aa | 4906 | .read_pmc = emulator_read_pmc, |
6c3287f7 | 4907 | .halt = emulator_halt, |
bcaf5cc5 | 4908 | .wbinvd = emulator_wbinvd, |
d6aa1000 | 4909 | .fix_hypercall = emulator_fix_hypercall, |
5037f6f3 AK |
4910 | .get_fpu = emulator_get_fpu, |
4911 | .put_fpu = emulator_put_fpu, | |
c4f035c6 | 4912 | .intercept = emulator_intercept, |
bdb42f5a | 4913 | .get_cpuid = emulator_get_cpuid, |
bbd9b64e CO |
4914 | }; |
4915 | ||
95cb2295 GN |
4916 | static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |
4917 | { | |
37ccdcbe | 4918 | u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu); |
95cb2295 GN |
4919 | /* |
4920 | * an sti; sti; sequence only disable interrupts for the first | |
4921 | * instruction. So, if the last instruction, be it emulated or | |
4922 | * not, left the system with the INT_STI flag enabled, it | |
4923 | * means that the last instruction is an sti. We should not | |
4924 | * leave the flag on in this case. The same goes for mov ss | |
4925 | */ | |
37ccdcbe PB |
4926 | if (int_shadow & mask) |
4927 | mask = 0; | |
6addfc42 | 4928 | if (unlikely(int_shadow || mask)) { |
95cb2295 | 4929 | kvm_x86_ops->set_interrupt_shadow(vcpu, mask); |
6addfc42 PB |
4930 | if (!mask) |
4931 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
4932 | } | |
95cb2295 GN |
4933 | } |
4934 | ||
ef54bcfe | 4935 | static bool inject_emulated_exception(struct kvm_vcpu *vcpu) |
54b8486f GN |
4936 | { |
4937 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; | |
da9cb575 | 4938 | if (ctxt->exception.vector == PF_VECTOR) |
ef54bcfe PB |
4939 | return kvm_propagate_fault(vcpu, &ctxt->exception); |
4940 | ||
4941 | if (ctxt->exception.error_code_valid) | |
da9cb575 AK |
4942 | kvm_queue_exception_e(vcpu, ctxt->exception.vector, |
4943 | ctxt->exception.error_code); | |
54b8486f | 4944 | else |
da9cb575 | 4945 | kvm_queue_exception(vcpu, ctxt->exception.vector); |
ef54bcfe | 4946 | return false; |
54b8486f GN |
4947 | } |
4948 | ||
8ec4722d MG |
4949 | static void init_emulate_ctxt(struct kvm_vcpu *vcpu) |
4950 | { | |
adf52235 | 4951 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d MG |
4952 | int cs_db, cs_l; |
4953 | ||
8ec4722d MG |
4954 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
4955 | ||
adf52235 TY |
4956 | ctxt->eflags = kvm_get_rflags(vcpu); |
4957 | ctxt->eip = kvm_rip_read(vcpu); | |
4958 | ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : | |
4959 | (ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 : | |
42bf549f | 4960 | (cs_l && is_long_mode(vcpu)) ? X86EMUL_MODE_PROT64 : |
adf52235 TY |
4961 | cs_db ? X86EMUL_MODE_PROT32 : |
4962 | X86EMUL_MODE_PROT16; | |
4963 | ctxt->guest_mode = is_guest_mode(vcpu); | |
4964 | ||
dd856efa | 4965 | init_decode_cache(ctxt); |
7ae441ea | 4966 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; |
8ec4722d MG |
4967 | } |
4968 | ||
71f9833b | 4969 | int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip) |
63995653 | 4970 | { |
9d74191a | 4971 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
63995653 MG |
4972 | int ret; |
4973 | ||
4974 | init_emulate_ctxt(vcpu); | |
4975 | ||
9dac77fa AK |
4976 | ctxt->op_bytes = 2; |
4977 | ctxt->ad_bytes = 2; | |
4978 | ctxt->_eip = ctxt->eip + inc_eip; | |
9d74191a | 4979 | ret = emulate_int_real(ctxt, irq); |
63995653 MG |
4980 | |
4981 | if (ret != X86EMUL_CONTINUE) | |
4982 | return EMULATE_FAIL; | |
4983 | ||
9dac77fa | 4984 | ctxt->eip = ctxt->_eip; |
9d74191a TY |
4985 | kvm_rip_write(vcpu, ctxt->eip); |
4986 | kvm_set_rflags(vcpu, ctxt->eflags); | |
63995653 MG |
4987 | |
4988 | if (irq == NMI_VECTOR) | |
7460fb4a | 4989 | vcpu->arch.nmi_pending = 0; |
63995653 MG |
4990 | else |
4991 | vcpu->arch.interrupt.pending = false; | |
4992 | ||
4993 | return EMULATE_DONE; | |
4994 | } | |
4995 | EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt); | |
4996 | ||
6d77dbfc GN |
4997 | static int handle_emulation_failure(struct kvm_vcpu *vcpu) |
4998 | { | |
fc3a9157 JR |
4999 | int r = EMULATE_DONE; |
5000 | ||
6d77dbfc GN |
5001 | ++vcpu->stat.insn_emulation_fail; |
5002 | trace_kvm_emulate_insn_failed(vcpu); | |
fc3a9157 JR |
5003 | if (!is_guest_mode(vcpu)) { |
5004 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
5005 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
5006 | vcpu->run->internal.ndata = 0; | |
5007 | r = EMULATE_FAIL; | |
5008 | } | |
6d77dbfc | 5009 | kvm_queue_exception(vcpu, UD_VECTOR); |
fc3a9157 JR |
5010 | |
5011 | return r; | |
6d77dbfc GN |
5012 | } |
5013 | ||
93c05d3e | 5014 | static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2, |
991eebf9 GN |
5015 | bool write_fault_to_shadow_pgtable, |
5016 | int emulation_type) | |
a6f177ef | 5017 | { |
95b3cf69 | 5018 | gpa_t gpa = cr2; |
8e3d9d06 | 5019 | pfn_t pfn; |
a6f177ef | 5020 | |
991eebf9 GN |
5021 | if (emulation_type & EMULTYPE_NO_REEXECUTE) |
5022 | return false; | |
5023 | ||
95b3cf69 XG |
5024 | if (!vcpu->arch.mmu.direct_map) { |
5025 | /* | |
5026 | * Write permission should be allowed since only | |
5027 | * write access need to be emulated. | |
5028 | */ | |
5029 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
a6f177ef | 5030 | |
95b3cf69 XG |
5031 | /* |
5032 | * If the mapping is invalid in guest, let cpu retry | |
5033 | * it to generate fault. | |
5034 | */ | |
5035 | if (gpa == UNMAPPED_GVA) | |
5036 | return true; | |
5037 | } | |
a6f177ef | 5038 | |
8e3d9d06 XG |
5039 | /* |
5040 | * Do not retry the unhandleable instruction if it faults on the | |
5041 | * readonly host memory, otherwise it will goto a infinite loop: | |
5042 | * retry instruction -> write #PF -> emulation fail -> retry | |
5043 | * instruction -> ... | |
5044 | */ | |
5045 | pfn = gfn_to_pfn(vcpu->kvm, gpa_to_gfn(gpa)); | |
95b3cf69 XG |
5046 | |
5047 | /* | |
5048 | * If the instruction failed on the error pfn, it can not be fixed, | |
5049 | * report the error to userspace. | |
5050 | */ | |
5051 | if (is_error_noslot_pfn(pfn)) | |
5052 | return false; | |
5053 | ||
5054 | kvm_release_pfn_clean(pfn); | |
5055 | ||
5056 | /* The instructions are well-emulated on direct mmu. */ | |
5057 | if (vcpu->arch.mmu.direct_map) { | |
5058 | unsigned int indirect_shadow_pages; | |
5059 | ||
5060 | spin_lock(&vcpu->kvm->mmu_lock); | |
5061 | indirect_shadow_pages = vcpu->kvm->arch.indirect_shadow_pages; | |
5062 | spin_unlock(&vcpu->kvm->mmu_lock); | |
5063 | ||
5064 | if (indirect_shadow_pages) | |
5065 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
5066 | ||
a6f177ef | 5067 | return true; |
8e3d9d06 | 5068 | } |
a6f177ef | 5069 | |
95b3cf69 XG |
5070 | /* |
5071 | * if emulation was due to access to shadowed page table | |
5072 | * and it failed try to unshadow page and re-enter the | |
5073 | * guest to let CPU execute the instruction. | |
5074 | */ | |
5075 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
93c05d3e XG |
5076 | |
5077 | /* | |
5078 | * If the access faults on its page table, it can not | |
5079 | * be fixed by unprotecting shadow page and it should | |
5080 | * be reported to userspace. | |
5081 | */ | |
5082 | return !write_fault_to_shadow_pgtable; | |
a6f177ef GN |
5083 | } |
5084 | ||
1cb3f3ae XG |
5085 | static bool retry_instruction(struct x86_emulate_ctxt *ctxt, |
5086 | unsigned long cr2, int emulation_type) | |
5087 | { | |
5088 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5089 | unsigned long last_retry_eip, last_retry_addr, gpa = cr2; | |
5090 | ||
5091 | last_retry_eip = vcpu->arch.last_retry_eip; | |
5092 | last_retry_addr = vcpu->arch.last_retry_addr; | |
5093 | ||
5094 | /* | |
5095 | * If the emulation is caused by #PF and it is non-page_table | |
5096 | * writing instruction, it means the VM-EXIT is caused by shadow | |
5097 | * page protected, we can zap the shadow page and retry this | |
5098 | * instruction directly. | |
5099 | * | |
5100 | * Note: if the guest uses a non-page-table modifying instruction | |
5101 | * on the PDE that points to the instruction, then we will unmap | |
5102 | * the instruction and go to an infinite loop. So, we cache the | |
5103 | * last retried eip and the last fault address, if we meet the eip | |
5104 | * and the address again, we can break out of the potential infinite | |
5105 | * loop. | |
5106 | */ | |
5107 | vcpu->arch.last_retry_eip = vcpu->arch.last_retry_addr = 0; | |
5108 | ||
5109 | if (!(emulation_type & EMULTYPE_RETRY)) | |
5110 | return false; | |
5111 | ||
5112 | if (x86_page_table_writing_insn(ctxt)) | |
5113 | return false; | |
5114 | ||
5115 | if (ctxt->eip == last_retry_eip && last_retry_addr == cr2) | |
5116 | return false; | |
5117 | ||
5118 | vcpu->arch.last_retry_eip = ctxt->eip; | |
5119 | vcpu->arch.last_retry_addr = cr2; | |
5120 | ||
5121 | if (!vcpu->arch.mmu.direct_map) | |
5122 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
5123 | ||
22368028 | 5124 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); |
1cb3f3ae XG |
5125 | |
5126 | return true; | |
5127 | } | |
5128 | ||
716d51ab GN |
5129 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu); |
5130 | static int complete_emulated_pio(struct kvm_vcpu *vcpu); | |
5131 | ||
4a1e10d5 PB |
5132 | static int kvm_vcpu_check_hw_bp(unsigned long addr, u32 type, u32 dr7, |
5133 | unsigned long *db) | |
5134 | { | |
5135 | u32 dr6 = 0; | |
5136 | int i; | |
5137 | u32 enable, rwlen; | |
5138 | ||
5139 | enable = dr7; | |
5140 | rwlen = dr7 >> 16; | |
5141 | for (i = 0; i < 4; i++, enable >>= 2, rwlen >>= 4) | |
5142 | if ((enable & 3) && (rwlen & 15) == type && db[i] == addr) | |
5143 | dr6 |= (1 << i); | |
5144 | return dr6; | |
5145 | } | |
5146 | ||
6addfc42 | 5147 | static void kvm_vcpu_check_singlestep(struct kvm_vcpu *vcpu, unsigned long rflags, int *r) |
663f4c61 PB |
5148 | { |
5149 | struct kvm_run *kvm_run = vcpu->run; | |
5150 | ||
5151 | /* | |
6addfc42 PB |
5152 | * rflags is the old, "raw" value of the flags. The new value has |
5153 | * not been saved yet. | |
663f4c61 PB |
5154 | * |
5155 | * This is correct even for TF set by the guest, because "the | |
5156 | * processor will not generate this exception after the instruction | |
5157 | * that sets the TF flag". | |
5158 | */ | |
663f4c61 PB |
5159 | if (unlikely(rflags & X86_EFLAGS_TF)) { |
5160 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) { | |
6f43ed01 NA |
5161 | kvm_run->debug.arch.dr6 = DR6_BS | DR6_FIXED_1 | |
5162 | DR6_RTM; | |
663f4c61 PB |
5163 | kvm_run->debug.arch.pc = vcpu->arch.singlestep_rip; |
5164 | kvm_run->debug.arch.exception = DB_VECTOR; | |
5165 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
5166 | *r = EMULATE_USER_EXIT; | |
5167 | } else { | |
5168 | vcpu->arch.emulate_ctxt.eflags &= ~X86_EFLAGS_TF; | |
5169 | /* | |
5170 | * "Certain debug exceptions may clear bit 0-3. The | |
5171 | * remaining contents of the DR6 register are never | |
5172 | * cleared by the processor". | |
5173 | */ | |
5174 | vcpu->arch.dr6 &= ~15; | |
6f43ed01 | 5175 | vcpu->arch.dr6 |= DR6_BS | DR6_RTM; |
663f4c61 PB |
5176 | kvm_queue_exception(vcpu, DB_VECTOR); |
5177 | } | |
5178 | } | |
5179 | } | |
5180 | ||
4a1e10d5 PB |
5181 | static bool kvm_vcpu_check_breakpoint(struct kvm_vcpu *vcpu, int *r) |
5182 | { | |
5183 | struct kvm_run *kvm_run = vcpu->run; | |
5184 | unsigned long eip = vcpu->arch.emulate_ctxt.eip; | |
5185 | u32 dr6 = 0; | |
5186 | ||
5187 | if (unlikely(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) && | |
5188 | (vcpu->arch.guest_debug_dr7 & DR7_BP_EN_MASK)) { | |
5189 | dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
5190 | vcpu->arch.guest_debug_dr7, | |
5191 | vcpu->arch.eff_db); | |
5192 | ||
5193 | if (dr6 != 0) { | |
6f43ed01 | 5194 | kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1 | DR6_RTM; |
4a1e10d5 PB |
5195 | kvm_run->debug.arch.pc = kvm_rip_read(vcpu) + |
5196 | get_segment_base(vcpu, VCPU_SREG_CS); | |
5197 | ||
5198 | kvm_run->debug.arch.exception = DB_VECTOR; | |
5199 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
5200 | *r = EMULATE_USER_EXIT; | |
5201 | return true; | |
5202 | } | |
5203 | } | |
5204 | ||
4161a569 NA |
5205 | if (unlikely(vcpu->arch.dr7 & DR7_BP_EN_MASK) && |
5206 | !(kvm_get_rflags(vcpu) & X86_EFLAGS_RF)) { | |
4a1e10d5 PB |
5207 | dr6 = kvm_vcpu_check_hw_bp(eip, 0, |
5208 | vcpu->arch.dr7, | |
5209 | vcpu->arch.db); | |
5210 | ||
5211 | if (dr6 != 0) { | |
5212 | vcpu->arch.dr6 &= ~15; | |
6f43ed01 | 5213 | vcpu->arch.dr6 |= dr6 | DR6_RTM; |
4a1e10d5 PB |
5214 | kvm_queue_exception(vcpu, DB_VECTOR); |
5215 | *r = EMULATE_DONE; | |
5216 | return true; | |
5217 | } | |
5218 | } | |
5219 | ||
5220 | return false; | |
5221 | } | |
5222 | ||
51d8b661 AP |
5223 | int x86_emulate_instruction(struct kvm_vcpu *vcpu, |
5224 | unsigned long cr2, | |
dc25e89e AP |
5225 | int emulation_type, |
5226 | void *insn, | |
5227 | int insn_len) | |
bbd9b64e | 5228 | { |
95cb2295 | 5229 | int r; |
9d74191a | 5230 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
7ae441ea | 5231 | bool writeback = true; |
93c05d3e | 5232 | bool write_fault_to_spt = vcpu->arch.write_fault_to_shadow_pgtable; |
bbd9b64e | 5233 | |
93c05d3e XG |
5234 | /* |
5235 | * Clear write_fault_to_shadow_pgtable here to ensure it is | |
5236 | * never reused. | |
5237 | */ | |
5238 | vcpu->arch.write_fault_to_shadow_pgtable = false; | |
26eef70c | 5239 | kvm_clear_exception_queue(vcpu); |
8d7d8102 | 5240 | |
571008da | 5241 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
8ec4722d | 5242 | init_emulate_ctxt(vcpu); |
4a1e10d5 PB |
5243 | |
5244 | /* | |
5245 | * We will reenter on the same instruction since | |
5246 | * we do not set complete_userspace_io. This does not | |
5247 | * handle watchpoints yet, those would be handled in | |
5248 | * the emulate_ops. | |
5249 | */ | |
5250 | if (kvm_vcpu_check_breakpoint(vcpu, &r)) | |
5251 | return r; | |
5252 | ||
9d74191a TY |
5253 | ctxt->interruptibility = 0; |
5254 | ctxt->have_exception = false; | |
e0ad0b47 | 5255 | ctxt->exception.vector = -1; |
9d74191a | 5256 | ctxt->perm_ok = false; |
bbd9b64e | 5257 | |
b51e974f | 5258 | ctxt->ud = emulation_type & EMULTYPE_TRAP_UD; |
4005996e | 5259 | |
9d74191a | 5260 | r = x86_decode_insn(ctxt, insn, insn_len); |
bbd9b64e | 5261 | |
e46479f8 | 5262 | trace_kvm_emulate_insn_start(vcpu); |
f2b5756b | 5263 | ++vcpu->stat.insn_emulation; |
1d2887e2 | 5264 | if (r != EMULATION_OK) { |
4005996e AK |
5265 | if (emulation_type & EMULTYPE_TRAP_UD) |
5266 | return EMULATE_FAIL; | |
991eebf9 GN |
5267 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
5268 | emulation_type)) | |
bbd9b64e | 5269 | return EMULATE_DONE; |
6d77dbfc GN |
5270 | if (emulation_type & EMULTYPE_SKIP) |
5271 | return EMULATE_FAIL; | |
5272 | return handle_emulation_failure(vcpu); | |
bbd9b64e CO |
5273 | } |
5274 | } | |
5275 | ||
ba8afb6b | 5276 | if (emulation_type & EMULTYPE_SKIP) { |
9dac77fa | 5277 | kvm_rip_write(vcpu, ctxt->_eip); |
bb663c7a NA |
5278 | if (ctxt->eflags & X86_EFLAGS_RF) |
5279 | kvm_set_rflags(vcpu, ctxt->eflags & ~X86_EFLAGS_RF); | |
ba8afb6b GN |
5280 | return EMULATE_DONE; |
5281 | } | |
5282 | ||
1cb3f3ae XG |
5283 | if (retry_instruction(ctxt, cr2, emulation_type)) |
5284 | return EMULATE_DONE; | |
5285 | ||
7ae441ea | 5286 | /* this is needed for vmware backdoor interface to work since it |
4d2179e1 | 5287 | changes registers values during IO operation */ |
7ae441ea GN |
5288 | if (vcpu->arch.emulate_regs_need_sync_from_vcpu) { |
5289 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; | |
dd856efa | 5290 | emulator_invalidate_register_cache(ctxt); |
7ae441ea | 5291 | } |
4d2179e1 | 5292 | |
5cd21917 | 5293 | restart: |
9d74191a | 5294 | r = x86_emulate_insn(ctxt); |
bbd9b64e | 5295 | |
775fde86 JR |
5296 | if (r == EMULATION_INTERCEPTED) |
5297 | return EMULATE_DONE; | |
5298 | ||
d2ddd1c4 | 5299 | if (r == EMULATION_FAILED) { |
991eebf9 GN |
5300 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
5301 | emulation_type)) | |
c3cd7ffa GN |
5302 | return EMULATE_DONE; |
5303 | ||
6d77dbfc | 5304 | return handle_emulation_failure(vcpu); |
bbd9b64e CO |
5305 | } |
5306 | ||
9d74191a | 5307 | if (ctxt->have_exception) { |
d2ddd1c4 | 5308 | r = EMULATE_DONE; |
ef54bcfe PB |
5309 | if (inject_emulated_exception(vcpu)) |
5310 | return r; | |
d2ddd1c4 | 5311 | } else if (vcpu->arch.pio.count) { |
0912c977 PB |
5312 | if (!vcpu->arch.pio.in) { |
5313 | /* FIXME: return into emulator if single-stepping. */ | |
3457e419 | 5314 | vcpu->arch.pio.count = 0; |
0912c977 | 5315 | } else { |
7ae441ea | 5316 | writeback = false; |
716d51ab GN |
5317 | vcpu->arch.complete_userspace_io = complete_emulated_pio; |
5318 | } | |
ac0a48c3 | 5319 | r = EMULATE_USER_EXIT; |
7ae441ea GN |
5320 | } else if (vcpu->mmio_needed) { |
5321 | if (!vcpu->mmio_is_write) | |
5322 | writeback = false; | |
ac0a48c3 | 5323 | r = EMULATE_USER_EXIT; |
716d51ab | 5324 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; |
7ae441ea | 5325 | } else if (r == EMULATION_RESTART) |
5cd21917 | 5326 | goto restart; |
d2ddd1c4 GN |
5327 | else |
5328 | r = EMULATE_DONE; | |
f850e2e6 | 5329 | |
7ae441ea | 5330 | if (writeback) { |
6addfc42 | 5331 | unsigned long rflags = kvm_x86_ops->get_rflags(vcpu); |
9d74191a | 5332 | toggle_interruptibility(vcpu, ctxt->interruptibility); |
7ae441ea | 5333 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
9d74191a | 5334 | kvm_rip_write(vcpu, ctxt->eip); |
663f4c61 | 5335 | if (r == EMULATE_DONE) |
6addfc42 PB |
5336 | kvm_vcpu_check_singlestep(vcpu, rflags, &r); |
5337 | __kvm_set_rflags(vcpu, ctxt->eflags); | |
5338 | ||
5339 | /* | |
5340 | * For STI, interrupts are shadowed; so KVM_REQ_EVENT will | |
5341 | * do nothing, and it will be requested again as soon as | |
5342 | * the shadow expires. But we still need to check here, | |
5343 | * because POPF has no interrupt shadow. | |
5344 | */ | |
5345 | if (unlikely((ctxt->eflags & ~rflags) & X86_EFLAGS_IF)) | |
5346 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
7ae441ea GN |
5347 | } else |
5348 | vcpu->arch.emulate_regs_need_sync_to_vcpu = true; | |
e85d28f8 GN |
5349 | |
5350 | return r; | |
de7d789a | 5351 | } |
51d8b661 | 5352 | EXPORT_SYMBOL_GPL(x86_emulate_instruction); |
de7d789a | 5353 | |
cf8f70bf | 5354 | int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port) |
de7d789a | 5355 | { |
cf8f70bf | 5356 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
ca1d4a9e AK |
5357 | int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt, |
5358 | size, port, &val, 1); | |
cf8f70bf | 5359 | /* do not return to emulator after return from userspace */ |
7972995b | 5360 | vcpu->arch.pio.count = 0; |
de7d789a CO |
5361 | return ret; |
5362 | } | |
cf8f70bf | 5363 | EXPORT_SYMBOL_GPL(kvm_fast_pio_out); |
de7d789a | 5364 | |
8cfdc000 ZA |
5365 | static void tsc_bad(void *info) |
5366 | { | |
0a3aee0d | 5367 | __this_cpu_write(cpu_tsc_khz, 0); |
8cfdc000 ZA |
5368 | } |
5369 | ||
5370 | static void tsc_khz_changed(void *data) | |
c8076604 | 5371 | { |
8cfdc000 ZA |
5372 | struct cpufreq_freqs *freq = data; |
5373 | unsigned long khz = 0; | |
5374 | ||
5375 | if (data) | |
5376 | khz = freq->new; | |
5377 | else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) | |
5378 | khz = cpufreq_quick_get(raw_smp_processor_id()); | |
5379 | if (!khz) | |
5380 | khz = tsc_khz; | |
0a3aee0d | 5381 | __this_cpu_write(cpu_tsc_khz, khz); |
c8076604 GH |
5382 | } |
5383 | ||
c8076604 GH |
5384 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
5385 | void *data) | |
5386 | { | |
5387 | struct cpufreq_freqs *freq = data; | |
5388 | struct kvm *kvm; | |
5389 | struct kvm_vcpu *vcpu; | |
5390 | int i, send_ipi = 0; | |
5391 | ||
8cfdc000 ZA |
5392 | /* |
5393 | * We allow guests to temporarily run on slowing clocks, | |
5394 | * provided we notify them after, or to run on accelerating | |
5395 | * clocks, provided we notify them before. Thus time never | |
5396 | * goes backwards. | |
5397 | * | |
5398 | * However, we have a problem. We can't atomically update | |
5399 | * the frequency of a given CPU from this function; it is | |
5400 | * merely a notifier, which can be called from any CPU. | |
5401 | * Changing the TSC frequency at arbitrary points in time | |
5402 | * requires a recomputation of local variables related to | |
5403 | * the TSC for each VCPU. We must flag these local variables | |
5404 | * to be updated and be sure the update takes place with the | |
5405 | * new frequency before any guests proceed. | |
5406 | * | |
5407 | * Unfortunately, the combination of hotplug CPU and frequency | |
5408 | * change creates an intractable locking scenario; the order | |
5409 | * of when these callouts happen is undefined with respect to | |
5410 | * CPU hotplug, and they can race with each other. As such, | |
5411 | * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is | |
5412 | * undefined; you can actually have a CPU frequency change take | |
5413 | * place in between the computation of X and the setting of the | |
5414 | * variable. To protect against this problem, all updates of | |
5415 | * the per_cpu tsc_khz variable are done in an interrupt | |
5416 | * protected IPI, and all callers wishing to update the value | |
5417 | * must wait for a synchronous IPI to complete (which is trivial | |
5418 | * if the caller is on the CPU already). This establishes the | |
5419 | * necessary total order on variable updates. | |
5420 | * | |
5421 | * Note that because a guest time update may take place | |
5422 | * anytime after the setting of the VCPU's request bit, the | |
5423 | * correct TSC value must be set before the request. However, | |
5424 | * to ensure the update actually makes it to any guest which | |
5425 | * starts running in hardware virtualization between the set | |
5426 | * and the acquisition of the spinlock, we must also ping the | |
5427 | * CPU after setting the request bit. | |
5428 | * | |
5429 | */ | |
5430 | ||
c8076604 GH |
5431 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
5432 | return 0; | |
5433 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
5434 | return 0; | |
8cfdc000 ZA |
5435 | |
5436 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); | |
c8076604 | 5437 | |
2f303b74 | 5438 | spin_lock(&kvm_lock); |
c8076604 | 5439 | list_for_each_entry(kvm, &vm_list, vm_list) { |
988a2cae | 5440 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
5441 | if (vcpu->cpu != freq->cpu) |
5442 | continue; | |
c285545f | 5443 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
c8076604 | 5444 | if (vcpu->cpu != smp_processor_id()) |
8cfdc000 | 5445 | send_ipi = 1; |
c8076604 GH |
5446 | } |
5447 | } | |
2f303b74 | 5448 | spin_unlock(&kvm_lock); |
c8076604 GH |
5449 | |
5450 | if (freq->old < freq->new && send_ipi) { | |
5451 | /* | |
5452 | * We upscale the frequency. Must make the guest | |
5453 | * doesn't see old kvmclock values while running with | |
5454 | * the new frequency, otherwise we risk the guest sees | |
5455 | * time go backwards. | |
5456 | * | |
5457 | * In case we update the frequency for another cpu | |
5458 | * (which might be in guest context) send an interrupt | |
5459 | * to kick the cpu out of guest context. Next time | |
5460 | * guest context is entered kvmclock will be updated, | |
5461 | * so the guest will not see stale values. | |
5462 | */ | |
8cfdc000 | 5463 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); |
c8076604 GH |
5464 | } |
5465 | return 0; | |
5466 | } | |
5467 | ||
5468 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
8cfdc000 ZA |
5469 | .notifier_call = kvmclock_cpufreq_notifier |
5470 | }; | |
5471 | ||
5472 | static int kvmclock_cpu_notifier(struct notifier_block *nfb, | |
5473 | unsigned long action, void *hcpu) | |
5474 | { | |
5475 | unsigned int cpu = (unsigned long)hcpu; | |
5476 | ||
5477 | switch (action) { | |
5478 | case CPU_ONLINE: | |
5479 | case CPU_DOWN_FAILED: | |
5480 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
5481 | break; | |
5482 | case CPU_DOWN_PREPARE: | |
5483 | smp_call_function_single(cpu, tsc_bad, NULL, 1); | |
5484 | break; | |
5485 | } | |
5486 | return NOTIFY_OK; | |
5487 | } | |
5488 | ||
5489 | static struct notifier_block kvmclock_cpu_notifier_block = { | |
5490 | .notifier_call = kvmclock_cpu_notifier, | |
5491 | .priority = -INT_MAX | |
c8076604 GH |
5492 | }; |
5493 | ||
b820cc0c ZA |
5494 | static void kvm_timer_init(void) |
5495 | { | |
5496 | int cpu; | |
5497 | ||
c285545f | 5498 | max_tsc_khz = tsc_khz; |
460dd42e SB |
5499 | |
5500 | cpu_notifier_register_begin(); | |
b820cc0c | 5501 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
c285545f ZA |
5502 | #ifdef CONFIG_CPU_FREQ |
5503 | struct cpufreq_policy policy; | |
5504 | memset(&policy, 0, sizeof(policy)); | |
3e26f230 AK |
5505 | cpu = get_cpu(); |
5506 | cpufreq_get_policy(&policy, cpu); | |
c285545f ZA |
5507 | if (policy.cpuinfo.max_freq) |
5508 | max_tsc_khz = policy.cpuinfo.max_freq; | |
3e26f230 | 5509 | put_cpu(); |
c285545f | 5510 | #endif |
b820cc0c ZA |
5511 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
5512 | CPUFREQ_TRANSITION_NOTIFIER); | |
5513 | } | |
c285545f | 5514 | pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz); |
8cfdc000 ZA |
5515 | for_each_online_cpu(cpu) |
5516 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
460dd42e SB |
5517 | |
5518 | __register_hotcpu_notifier(&kvmclock_cpu_notifier_block); | |
5519 | cpu_notifier_register_done(); | |
5520 | ||
b820cc0c ZA |
5521 | } |
5522 | ||
ff9d07a0 ZY |
5523 | static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
5524 | ||
f5132b01 | 5525 | int kvm_is_in_guest(void) |
ff9d07a0 | 5526 | { |
086c9855 | 5527 | return __this_cpu_read(current_vcpu) != NULL; |
ff9d07a0 ZY |
5528 | } |
5529 | ||
5530 | static int kvm_is_user_mode(void) | |
5531 | { | |
5532 | int user_mode = 3; | |
dcf46b94 | 5533 | |
086c9855 AS |
5534 | if (__this_cpu_read(current_vcpu)) |
5535 | user_mode = kvm_x86_ops->get_cpl(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 5536 | |
ff9d07a0 ZY |
5537 | return user_mode != 0; |
5538 | } | |
5539 | ||
5540 | static unsigned long kvm_get_guest_ip(void) | |
5541 | { | |
5542 | unsigned long ip = 0; | |
dcf46b94 | 5543 | |
086c9855 AS |
5544 | if (__this_cpu_read(current_vcpu)) |
5545 | ip = kvm_rip_read(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 5546 | |
ff9d07a0 ZY |
5547 | return ip; |
5548 | } | |
5549 | ||
5550 | static struct perf_guest_info_callbacks kvm_guest_cbs = { | |
5551 | .is_in_guest = kvm_is_in_guest, | |
5552 | .is_user_mode = kvm_is_user_mode, | |
5553 | .get_guest_ip = kvm_get_guest_ip, | |
5554 | }; | |
5555 | ||
5556 | void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) | |
5557 | { | |
086c9855 | 5558 | __this_cpu_write(current_vcpu, vcpu); |
ff9d07a0 ZY |
5559 | } |
5560 | EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); | |
5561 | ||
5562 | void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) | |
5563 | { | |
086c9855 | 5564 | __this_cpu_write(current_vcpu, NULL); |
ff9d07a0 ZY |
5565 | } |
5566 | EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); | |
5567 | ||
ce88decf XG |
5568 | static void kvm_set_mmio_spte_mask(void) |
5569 | { | |
5570 | u64 mask; | |
5571 | int maxphyaddr = boot_cpu_data.x86_phys_bits; | |
5572 | ||
5573 | /* | |
5574 | * Set the reserved bits and the present bit of an paging-structure | |
5575 | * entry to generate page fault with PFER.RSV = 1. | |
5576 | */ | |
885032b9 | 5577 | /* Mask the reserved physical address bits. */ |
d1431483 | 5578 | mask = rsvd_bits(maxphyaddr, 51); |
885032b9 XG |
5579 | |
5580 | /* Bit 62 is always reserved for 32bit host. */ | |
5581 | mask |= 0x3ull << 62; | |
5582 | ||
5583 | /* Set the present bit. */ | |
ce88decf XG |
5584 | mask |= 1ull; |
5585 | ||
5586 | #ifdef CONFIG_X86_64 | |
5587 | /* | |
5588 | * If reserved bit is not supported, clear the present bit to disable | |
5589 | * mmio page fault. | |
5590 | */ | |
5591 | if (maxphyaddr == 52) | |
5592 | mask &= ~1ull; | |
5593 | #endif | |
5594 | ||
5595 | kvm_mmu_set_mmio_spte_mask(mask); | |
5596 | } | |
5597 | ||
16e8d74d MT |
5598 | #ifdef CONFIG_X86_64 |
5599 | static void pvclock_gtod_update_fn(struct work_struct *work) | |
5600 | { | |
d828199e MT |
5601 | struct kvm *kvm; |
5602 | ||
5603 | struct kvm_vcpu *vcpu; | |
5604 | int i; | |
5605 | ||
2f303b74 | 5606 | spin_lock(&kvm_lock); |
d828199e MT |
5607 | list_for_each_entry(kvm, &vm_list, vm_list) |
5608 | kvm_for_each_vcpu(i, vcpu, kvm) | |
5609 | set_bit(KVM_REQ_MASTERCLOCK_UPDATE, &vcpu->requests); | |
5610 | atomic_set(&kvm_guest_has_master_clock, 0); | |
2f303b74 | 5611 | spin_unlock(&kvm_lock); |
16e8d74d MT |
5612 | } |
5613 | ||
5614 | static DECLARE_WORK(pvclock_gtod_work, pvclock_gtod_update_fn); | |
5615 | ||
5616 | /* | |
5617 | * Notification about pvclock gtod data update. | |
5618 | */ | |
5619 | static int pvclock_gtod_notify(struct notifier_block *nb, unsigned long unused, | |
5620 | void *priv) | |
5621 | { | |
5622 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
5623 | struct timekeeper *tk = priv; | |
5624 | ||
5625 | update_pvclock_gtod(tk); | |
5626 | ||
5627 | /* disable master clock if host does not trust, or does not | |
5628 | * use, TSC clocksource | |
5629 | */ | |
5630 | if (gtod->clock.vclock_mode != VCLOCK_TSC && | |
5631 | atomic_read(&kvm_guest_has_master_clock) != 0) | |
5632 | queue_work(system_long_wq, &pvclock_gtod_work); | |
5633 | ||
5634 | return 0; | |
5635 | } | |
5636 | ||
5637 | static struct notifier_block pvclock_gtod_notifier = { | |
5638 | .notifier_call = pvclock_gtod_notify, | |
5639 | }; | |
5640 | #endif | |
5641 | ||
f8c16bba | 5642 | int kvm_arch_init(void *opaque) |
043405e1 | 5643 | { |
b820cc0c | 5644 | int r; |
6b61edf7 | 5645 | struct kvm_x86_ops *ops = opaque; |
f8c16bba | 5646 | |
f8c16bba ZX |
5647 | if (kvm_x86_ops) { |
5648 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
5649 | r = -EEXIST; |
5650 | goto out; | |
f8c16bba ZX |
5651 | } |
5652 | ||
5653 | if (!ops->cpu_has_kvm_support()) { | |
5654 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
5655 | r = -EOPNOTSUPP; |
5656 | goto out; | |
f8c16bba ZX |
5657 | } |
5658 | if (ops->disabled_by_bios()) { | |
5659 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
5660 | r = -EOPNOTSUPP; |
5661 | goto out; | |
f8c16bba ZX |
5662 | } |
5663 | ||
013f6a5d MT |
5664 | r = -ENOMEM; |
5665 | shared_msrs = alloc_percpu(struct kvm_shared_msrs); | |
5666 | if (!shared_msrs) { | |
5667 | printk(KERN_ERR "kvm: failed to allocate percpu kvm_shared_msrs\n"); | |
5668 | goto out; | |
5669 | } | |
5670 | ||
97db56ce AK |
5671 | r = kvm_mmu_module_init(); |
5672 | if (r) | |
013f6a5d | 5673 | goto out_free_percpu; |
97db56ce | 5674 | |
ce88decf | 5675 | kvm_set_mmio_spte_mask(); |
97db56ce | 5676 | |
f8c16bba | 5677 | kvm_x86_ops = ops; |
920c8377 PB |
5678 | kvm_init_msr_list(); |
5679 | ||
7b52345e | 5680 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, |
4b12f0de | 5681 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
c8076604 | 5682 | |
b820cc0c | 5683 | kvm_timer_init(); |
c8076604 | 5684 | |
ff9d07a0 ZY |
5685 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
5686 | ||
2acf923e DC |
5687 | if (cpu_has_xsave) |
5688 | host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); | |
5689 | ||
c5cc421b | 5690 | kvm_lapic_init(); |
16e8d74d MT |
5691 | #ifdef CONFIG_X86_64 |
5692 | pvclock_gtod_register_notifier(&pvclock_gtod_notifier); | |
5693 | #endif | |
5694 | ||
f8c16bba | 5695 | return 0; |
56c6d28a | 5696 | |
013f6a5d MT |
5697 | out_free_percpu: |
5698 | free_percpu(shared_msrs); | |
56c6d28a | 5699 | out: |
56c6d28a | 5700 | return r; |
043405e1 | 5701 | } |
8776e519 | 5702 | |
f8c16bba ZX |
5703 | void kvm_arch_exit(void) |
5704 | { | |
ff9d07a0 ZY |
5705 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
5706 | ||
888d256e JK |
5707 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
5708 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
5709 | CPUFREQ_TRANSITION_NOTIFIER); | |
8cfdc000 | 5710 | unregister_hotcpu_notifier(&kvmclock_cpu_notifier_block); |
16e8d74d MT |
5711 | #ifdef CONFIG_X86_64 |
5712 | pvclock_gtod_unregister_notifier(&pvclock_gtod_notifier); | |
5713 | #endif | |
f8c16bba | 5714 | kvm_x86_ops = NULL; |
56c6d28a | 5715 | kvm_mmu_module_exit(); |
013f6a5d | 5716 | free_percpu(shared_msrs); |
56c6d28a | 5717 | } |
f8c16bba | 5718 | |
8776e519 HB |
5719 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
5720 | { | |
5721 | ++vcpu->stat.halt_exits; | |
5722 | if (irqchip_in_kernel(vcpu->kvm)) { | |
a4535290 | 5723 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
5724 | return 1; |
5725 | } else { | |
5726 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
5727 | return 0; | |
5728 | } | |
5729 | } | |
5730 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
5731 | ||
55cd8e5a GN |
5732 | int kvm_hv_hypercall(struct kvm_vcpu *vcpu) |
5733 | { | |
5734 | u64 param, ingpa, outgpa, ret; | |
5735 | uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0; | |
5736 | bool fast, longmode; | |
55cd8e5a GN |
5737 | |
5738 | /* | |
5739 | * hypercall generates UD from non zero cpl and real mode | |
5740 | * per HYPER-V spec | |
5741 | */ | |
3eeb3288 | 5742 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) { |
55cd8e5a GN |
5743 | kvm_queue_exception(vcpu, UD_VECTOR); |
5744 | return 0; | |
5745 | } | |
5746 | ||
a449c7aa | 5747 | longmode = is_64_bit_mode(vcpu); |
55cd8e5a GN |
5748 | |
5749 | if (!longmode) { | |
ccd46936 GN |
5750 | param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) | |
5751 | (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff); | |
5752 | ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) | | |
5753 | (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff); | |
5754 | outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) | | |
5755 | (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff); | |
55cd8e5a GN |
5756 | } |
5757 | #ifdef CONFIG_X86_64 | |
5758 | else { | |
5759 | param = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5760 | ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
5761 | outgpa = kvm_register_read(vcpu, VCPU_REGS_R8); | |
5762 | } | |
5763 | #endif | |
5764 | ||
5765 | code = param & 0xffff; | |
5766 | fast = (param >> 16) & 0x1; | |
5767 | rep_cnt = (param >> 32) & 0xfff; | |
5768 | rep_idx = (param >> 48) & 0xfff; | |
5769 | ||
5770 | trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa); | |
5771 | ||
c25bc163 GN |
5772 | switch (code) { |
5773 | case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT: | |
5774 | kvm_vcpu_on_spin(vcpu); | |
5775 | break; | |
5776 | default: | |
5777 | res = HV_STATUS_INVALID_HYPERCALL_CODE; | |
5778 | break; | |
5779 | } | |
55cd8e5a GN |
5780 | |
5781 | ret = res | (((u64)rep_done & 0xfff) << 32); | |
5782 | if (longmode) { | |
5783 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); | |
5784 | } else { | |
5785 | kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32); | |
5786 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff); | |
5787 | } | |
5788 | ||
5789 | return 1; | |
5790 | } | |
5791 | ||
6aef266c SV |
5792 | /* |
5793 | * kvm_pv_kick_cpu_op: Kick a vcpu. | |
5794 | * | |
5795 | * @apicid - apicid of vcpu to be kicked. | |
5796 | */ | |
5797 | static void kvm_pv_kick_cpu_op(struct kvm *kvm, unsigned long flags, int apicid) | |
5798 | { | |
24d2166b | 5799 | struct kvm_lapic_irq lapic_irq; |
6aef266c | 5800 | |
24d2166b R |
5801 | lapic_irq.shorthand = 0; |
5802 | lapic_irq.dest_mode = 0; | |
5803 | lapic_irq.dest_id = apicid; | |
6aef266c | 5804 | |
24d2166b R |
5805 | lapic_irq.delivery_mode = APIC_DM_REMRD; |
5806 | kvm_irq_delivery_to_apic(kvm, 0, &lapic_irq, NULL); | |
6aef266c SV |
5807 | } |
5808 | ||
8776e519 HB |
5809 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
5810 | { | |
5811 | unsigned long nr, a0, a1, a2, a3, ret; | |
a449c7aa | 5812 | int op_64_bit, r = 1; |
8776e519 | 5813 | |
55cd8e5a GN |
5814 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
5815 | return kvm_hv_hypercall(vcpu); | |
5816 | ||
5fdbf976 MT |
5817 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
5818 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
5819 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5820 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
5821 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 5822 | |
229456fc | 5823 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 5824 | |
a449c7aa NA |
5825 | op_64_bit = is_64_bit_mode(vcpu); |
5826 | if (!op_64_bit) { | |
8776e519 HB |
5827 | nr &= 0xFFFFFFFF; |
5828 | a0 &= 0xFFFFFFFF; | |
5829 | a1 &= 0xFFFFFFFF; | |
5830 | a2 &= 0xFFFFFFFF; | |
5831 | a3 &= 0xFFFFFFFF; | |
5832 | } | |
5833 | ||
07708c4a JK |
5834 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
5835 | ret = -KVM_EPERM; | |
5836 | goto out; | |
5837 | } | |
5838 | ||
8776e519 | 5839 | switch (nr) { |
b93463aa AK |
5840 | case KVM_HC_VAPIC_POLL_IRQ: |
5841 | ret = 0; | |
5842 | break; | |
6aef266c SV |
5843 | case KVM_HC_KICK_CPU: |
5844 | kvm_pv_kick_cpu_op(vcpu->kvm, a0, a1); | |
5845 | ret = 0; | |
5846 | break; | |
8776e519 HB |
5847 | default: |
5848 | ret = -KVM_ENOSYS; | |
5849 | break; | |
5850 | } | |
07708c4a | 5851 | out: |
a449c7aa NA |
5852 | if (!op_64_bit) |
5853 | ret = (u32)ret; | |
5fdbf976 | 5854 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 5855 | ++vcpu->stat.hypercalls; |
2f333bcb | 5856 | return r; |
8776e519 HB |
5857 | } |
5858 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
5859 | ||
b6785def | 5860 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) |
8776e519 | 5861 | { |
d6aa1000 | 5862 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
8776e519 | 5863 | char instruction[3]; |
5fdbf976 | 5864 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 5865 | |
8776e519 | 5866 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 5867 | |
9d74191a | 5868 | return emulator_write_emulated(ctxt, rip, instruction, 3, NULL); |
8776e519 HB |
5869 | } |
5870 | ||
b6c7a5dc HB |
5871 | /* |
5872 | * Check if userspace requested an interrupt window, and that the | |
5873 | * interrupt window is open. | |
5874 | * | |
5875 | * No need to exit to userspace if we already have an interrupt queued. | |
5876 | */ | |
851ba692 | 5877 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 5878 | { |
8061823a | 5879 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
851ba692 | 5880 | vcpu->run->request_interrupt_window && |
5df56646 | 5881 | kvm_arch_interrupt_allowed(vcpu)); |
b6c7a5dc HB |
5882 | } |
5883 | ||
851ba692 | 5884 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 5885 | { |
851ba692 AK |
5886 | struct kvm_run *kvm_run = vcpu->run; |
5887 | ||
91586a3b | 5888 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
2d3ad1f4 | 5889 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 5890 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
4531220b | 5891 | if (irqchip_in_kernel(vcpu->kvm)) |
b6c7a5dc | 5892 | kvm_run->ready_for_interrupt_injection = 1; |
4531220b | 5893 | else |
b6c7a5dc | 5894 | kvm_run->ready_for_interrupt_injection = |
fa9726b0 GN |
5895 | kvm_arch_interrupt_allowed(vcpu) && |
5896 | !kvm_cpu_has_interrupt(vcpu) && | |
5897 | !kvm_event_needs_reinjection(vcpu); | |
b6c7a5dc HB |
5898 | } |
5899 | ||
95ba8273 GN |
5900 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
5901 | { | |
5902 | int max_irr, tpr; | |
5903 | ||
5904 | if (!kvm_x86_ops->update_cr8_intercept) | |
5905 | return; | |
5906 | ||
88c808fd AK |
5907 | if (!vcpu->arch.apic) |
5908 | return; | |
5909 | ||
8db3baa2 GN |
5910 | if (!vcpu->arch.apic->vapic_addr) |
5911 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
5912 | else | |
5913 | max_irr = -1; | |
95ba8273 GN |
5914 | |
5915 | if (max_irr != -1) | |
5916 | max_irr >>= 4; | |
5917 | ||
5918 | tpr = kvm_lapic_get_cr8(vcpu); | |
5919 | ||
5920 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
5921 | } | |
5922 | ||
b6b8a145 | 5923 | static int inject_pending_event(struct kvm_vcpu *vcpu, bool req_int_win) |
95ba8273 | 5924 | { |
b6b8a145 JK |
5925 | int r; |
5926 | ||
95ba8273 | 5927 | /* try to reinject previous events if any */ |
b59bb7bd | 5928 | if (vcpu->arch.exception.pending) { |
5c1c85d0 AK |
5929 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
5930 | vcpu->arch.exception.has_error_code, | |
5931 | vcpu->arch.exception.error_code); | |
d6e8c854 NA |
5932 | |
5933 | if (exception_type(vcpu->arch.exception.nr) == EXCPT_FAULT) | |
5934 | __kvm_set_rflags(vcpu, kvm_get_rflags(vcpu) | | |
5935 | X86_EFLAGS_RF); | |
5936 | ||
b59bb7bd GN |
5937 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
5938 | vcpu->arch.exception.has_error_code, | |
ce7ddec4 JR |
5939 | vcpu->arch.exception.error_code, |
5940 | vcpu->arch.exception.reinject); | |
b6b8a145 | 5941 | return 0; |
b59bb7bd GN |
5942 | } |
5943 | ||
95ba8273 GN |
5944 | if (vcpu->arch.nmi_injected) { |
5945 | kvm_x86_ops->set_nmi(vcpu); | |
b6b8a145 | 5946 | return 0; |
95ba8273 GN |
5947 | } |
5948 | ||
5949 | if (vcpu->arch.interrupt.pending) { | |
66fd3f7f | 5950 | kvm_x86_ops->set_irq(vcpu); |
b6b8a145 JK |
5951 | return 0; |
5952 | } | |
5953 | ||
5954 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { | |
5955 | r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); | |
5956 | if (r != 0) | |
5957 | return r; | |
95ba8273 GN |
5958 | } |
5959 | ||
5960 | /* try to inject new event if pending */ | |
5961 | if (vcpu->arch.nmi_pending) { | |
5962 | if (kvm_x86_ops->nmi_allowed(vcpu)) { | |
7460fb4a | 5963 | --vcpu->arch.nmi_pending; |
95ba8273 GN |
5964 | vcpu->arch.nmi_injected = true; |
5965 | kvm_x86_ops->set_nmi(vcpu); | |
5966 | } | |
c7c9c56c | 5967 | } else if (kvm_cpu_has_injectable_intr(vcpu)) { |
9242b5b6 BD |
5968 | /* |
5969 | * Because interrupts can be injected asynchronously, we are | |
5970 | * calling check_nested_events again here to avoid a race condition. | |
5971 | * See https://lkml.org/lkml/2014/7/2/60 for discussion about this | |
5972 | * proposal and current concerns. Perhaps we should be setting | |
5973 | * KVM_REQ_EVENT only on certain events and not unconditionally? | |
5974 | */ | |
5975 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { | |
5976 | r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); | |
5977 | if (r != 0) | |
5978 | return r; | |
5979 | } | |
95ba8273 | 5980 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { |
66fd3f7f GN |
5981 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
5982 | false); | |
5983 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
5984 | } |
5985 | } | |
b6b8a145 | 5986 | return 0; |
95ba8273 GN |
5987 | } |
5988 | ||
7460fb4a AK |
5989 | static void process_nmi(struct kvm_vcpu *vcpu) |
5990 | { | |
5991 | unsigned limit = 2; | |
5992 | ||
5993 | /* | |
5994 | * x86 is limited to one NMI running, and one NMI pending after it. | |
5995 | * If an NMI is already in progress, limit further NMIs to just one. | |
5996 | * Otherwise, allow two (and we'll inject the first one immediately). | |
5997 | */ | |
5998 | if (kvm_x86_ops->get_nmi_mask(vcpu) || vcpu->arch.nmi_injected) | |
5999 | limit = 1; | |
6000 | ||
6001 | vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0); | |
6002 | vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit); | |
6003 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
6004 | } | |
6005 | ||
3d81bc7e | 6006 | static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu) |
c7c9c56c YZ |
6007 | { |
6008 | u64 eoi_exit_bitmap[4]; | |
cf9e65b7 | 6009 | u32 tmr[8]; |
c7c9c56c | 6010 | |
3d81bc7e YZ |
6011 | if (!kvm_apic_hw_enabled(vcpu->arch.apic)) |
6012 | return; | |
c7c9c56c YZ |
6013 | |
6014 | memset(eoi_exit_bitmap, 0, 32); | |
cf9e65b7 | 6015 | memset(tmr, 0, 32); |
c7c9c56c | 6016 | |
cf9e65b7 | 6017 | kvm_ioapic_scan_entry(vcpu, eoi_exit_bitmap, tmr); |
c7c9c56c | 6018 | kvm_x86_ops->load_eoi_exitmap(vcpu, eoi_exit_bitmap); |
cf9e65b7 | 6019 | kvm_apic_update_tmr(vcpu, tmr); |
c7c9c56c YZ |
6020 | } |
6021 | ||
9357d939 TY |
6022 | /* |
6023 | * Returns 1 to let __vcpu_run() continue the guest execution loop without | |
6024 | * exiting to the userspace. Otherwise, the value will be returned to the | |
6025 | * userspace. | |
6026 | */ | |
851ba692 | 6027 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
6028 | { |
6029 | int r; | |
6a8b1d13 | 6030 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 6031 | vcpu->run->request_interrupt_window; |
730dca42 | 6032 | bool req_immediate_exit = false; |
b6c7a5dc | 6033 | |
3e007509 | 6034 | if (vcpu->requests) { |
a8eeb04a | 6035 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) |
2e53d63a | 6036 | kvm_mmu_unload(vcpu); |
a8eeb04a | 6037 | if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu)) |
2f599714 | 6038 | __kvm_migrate_timers(vcpu); |
d828199e MT |
6039 | if (kvm_check_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu)) |
6040 | kvm_gen_update_masterclock(vcpu->kvm); | |
0061d53d MT |
6041 | if (kvm_check_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu)) |
6042 | kvm_gen_kvmclock_update(vcpu); | |
34c238a1 ZA |
6043 | if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) { |
6044 | r = kvm_guest_time_update(vcpu); | |
8cfdc000 ZA |
6045 | if (unlikely(r)) |
6046 | goto out; | |
6047 | } | |
a8eeb04a | 6048 | if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu)) |
4731d4c7 | 6049 | kvm_mmu_sync_roots(vcpu); |
a8eeb04a | 6050 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) |
d4acf7e7 | 6051 | kvm_x86_ops->tlb_flush(vcpu); |
a8eeb04a | 6052 | if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) { |
851ba692 | 6053 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
6054 | r = 0; |
6055 | goto out; | |
6056 | } | |
a8eeb04a | 6057 | if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) { |
851ba692 | 6058 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
71c4dfaf JR |
6059 | r = 0; |
6060 | goto out; | |
6061 | } | |
a8eeb04a | 6062 | if (kvm_check_request(KVM_REQ_DEACTIVATE_FPU, vcpu)) { |
02daab21 AK |
6063 | vcpu->fpu_active = 0; |
6064 | kvm_x86_ops->fpu_deactivate(vcpu); | |
6065 | } | |
af585b92 GN |
6066 | if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) { |
6067 | /* Page is swapped out. Do synthetic halt */ | |
6068 | vcpu->arch.apf.halted = true; | |
6069 | r = 1; | |
6070 | goto out; | |
6071 | } | |
c9aaa895 GC |
6072 | if (kvm_check_request(KVM_REQ_STEAL_UPDATE, vcpu)) |
6073 | record_steal_time(vcpu); | |
7460fb4a AK |
6074 | if (kvm_check_request(KVM_REQ_NMI, vcpu)) |
6075 | process_nmi(vcpu); | |
f5132b01 GN |
6076 | if (kvm_check_request(KVM_REQ_PMU, vcpu)) |
6077 | kvm_handle_pmu_event(vcpu); | |
6078 | if (kvm_check_request(KVM_REQ_PMI, vcpu)) | |
6079 | kvm_deliver_pmi(vcpu); | |
3d81bc7e YZ |
6080 | if (kvm_check_request(KVM_REQ_SCAN_IOAPIC, vcpu)) |
6081 | vcpu_scan_ioapic(vcpu); | |
2f52d58c | 6082 | } |
b93463aa | 6083 | |
b463a6f7 | 6084 | if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { |
66450a21 JK |
6085 | kvm_apic_accept_events(vcpu); |
6086 | if (vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { | |
6087 | r = 1; | |
6088 | goto out; | |
6089 | } | |
6090 | ||
b6b8a145 JK |
6091 | if (inject_pending_event(vcpu, req_int_win) != 0) |
6092 | req_immediate_exit = true; | |
b463a6f7 | 6093 | /* enable NMI/IRQ window open exits if needed */ |
b6b8a145 | 6094 | else if (vcpu->arch.nmi_pending) |
c9a7953f | 6095 | kvm_x86_ops->enable_nmi_window(vcpu); |
c7c9c56c | 6096 | else if (kvm_cpu_has_injectable_intr(vcpu) || req_int_win) |
c9a7953f | 6097 | kvm_x86_ops->enable_irq_window(vcpu); |
b463a6f7 AK |
6098 | |
6099 | if (kvm_lapic_enabled(vcpu)) { | |
c7c9c56c YZ |
6100 | /* |
6101 | * Update architecture specific hints for APIC | |
6102 | * virtual interrupt delivery. | |
6103 | */ | |
6104 | if (kvm_x86_ops->hwapic_irr_update) | |
6105 | kvm_x86_ops->hwapic_irr_update(vcpu, | |
6106 | kvm_lapic_find_highest_irr(vcpu)); | |
b463a6f7 AK |
6107 | update_cr8_intercept(vcpu); |
6108 | kvm_lapic_sync_to_vapic(vcpu); | |
6109 | } | |
6110 | } | |
6111 | ||
d8368af8 AK |
6112 | r = kvm_mmu_reload(vcpu); |
6113 | if (unlikely(r)) { | |
d905c069 | 6114 | goto cancel_injection; |
d8368af8 AK |
6115 | } |
6116 | ||
b6c7a5dc HB |
6117 | preempt_disable(); |
6118 | ||
6119 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2608d7a1 AK |
6120 | if (vcpu->fpu_active) |
6121 | kvm_load_guest_fpu(vcpu); | |
2acf923e | 6122 | kvm_load_guest_xcr0(vcpu); |
b6c7a5dc | 6123 | |
6b7e2d09 XG |
6124 | vcpu->mode = IN_GUEST_MODE; |
6125 | ||
01b71917 MT |
6126 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
6127 | ||
6b7e2d09 XG |
6128 | /* We should set ->mode before check ->requests, |
6129 | * see the comment in make_all_cpus_request. | |
6130 | */ | |
01b71917 | 6131 | smp_mb__after_srcu_read_unlock(); |
b6c7a5dc | 6132 | |
d94e1dc9 | 6133 | local_irq_disable(); |
32f88400 | 6134 | |
6b7e2d09 | 6135 | if (vcpu->mode == EXITING_GUEST_MODE || vcpu->requests |
d94e1dc9 | 6136 | || need_resched() || signal_pending(current)) { |
6b7e2d09 | 6137 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 6138 | smp_wmb(); |
6c142801 AK |
6139 | local_irq_enable(); |
6140 | preempt_enable(); | |
01b71917 | 6141 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
6c142801 | 6142 | r = 1; |
d905c069 | 6143 | goto cancel_injection; |
6c142801 AK |
6144 | } |
6145 | ||
d6185f20 NHE |
6146 | if (req_immediate_exit) |
6147 | smp_send_reschedule(vcpu->cpu); | |
6148 | ||
b6c7a5dc HB |
6149 | kvm_guest_enter(); |
6150 | ||
42dbaa5a | 6151 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
6152 | set_debugreg(0, 7); |
6153 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
6154 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
6155 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
6156 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
c77fb5fe | 6157 | set_debugreg(vcpu->arch.dr6, 6); |
42dbaa5a | 6158 | } |
b6c7a5dc | 6159 | |
229456fc | 6160 | trace_kvm_entry(vcpu->vcpu_id); |
851ba692 | 6161 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 6162 | |
c77fb5fe PB |
6163 | /* |
6164 | * Do this here before restoring debug registers on the host. And | |
6165 | * since we do this before handling the vmexit, a DR access vmexit | |
6166 | * can (a) read the correct value of the debug registers, (b) set | |
6167 | * KVM_DEBUGREG_WONT_EXIT again. | |
6168 | */ | |
6169 | if (unlikely(vcpu->arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT)) { | |
6170 | int i; | |
6171 | ||
6172 | WARN_ON(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP); | |
6173 | kvm_x86_ops->sync_dirty_debug_regs(vcpu); | |
6174 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
6175 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
6176 | } | |
6177 | ||
24f1e32c FW |
6178 | /* |
6179 | * If the guest has used debug registers, at least dr7 | |
6180 | * will be disabled while returning to the host. | |
6181 | * If we don't have active breakpoints in the host, we don't | |
6182 | * care about the messed up debug address registers. But if | |
6183 | * we have some of them active, restore the old state. | |
6184 | */ | |
59d8eb53 | 6185 | if (hw_breakpoint_active()) |
24f1e32c | 6186 | hw_breakpoint_restore(); |
42dbaa5a | 6187 | |
886b470c MT |
6188 | vcpu->arch.last_guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu, |
6189 | native_read_tsc()); | |
1d5f066e | 6190 | |
6b7e2d09 | 6191 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 6192 | smp_wmb(); |
a547c6db YZ |
6193 | |
6194 | /* Interrupt is enabled by handle_external_intr() */ | |
6195 | kvm_x86_ops->handle_external_intr(vcpu); | |
b6c7a5dc HB |
6196 | |
6197 | ++vcpu->stat.exits; | |
6198 | ||
6199 | /* | |
6200 | * We must have an instruction between local_irq_enable() and | |
6201 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
6202 | * the interrupt shadow. The stat.exits increment will do nicely. | |
6203 | * But we need to prevent reordering, hence this barrier(): | |
6204 | */ | |
6205 | barrier(); | |
6206 | ||
6207 | kvm_guest_exit(); | |
6208 | ||
6209 | preempt_enable(); | |
6210 | ||
f656ce01 | 6211 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 6212 | |
b6c7a5dc HB |
6213 | /* |
6214 | * Profile KVM exit RIPs: | |
6215 | */ | |
6216 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
6217 | unsigned long rip = kvm_rip_read(vcpu); |
6218 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
6219 | } |
6220 | ||
cc578287 ZA |
6221 | if (unlikely(vcpu->arch.tsc_always_catchup)) |
6222 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); | |
298101da | 6223 | |
5cfb1d5a MT |
6224 | if (vcpu->arch.apic_attention) |
6225 | kvm_lapic_sync_from_vapic(vcpu); | |
b93463aa | 6226 | |
851ba692 | 6227 | r = kvm_x86_ops->handle_exit(vcpu); |
d905c069 MT |
6228 | return r; |
6229 | ||
6230 | cancel_injection: | |
6231 | kvm_x86_ops->cancel_injection(vcpu); | |
ae7a2a3f MT |
6232 | if (unlikely(vcpu->arch.apic_attention)) |
6233 | kvm_lapic_sync_from_vapic(vcpu); | |
d7690175 MT |
6234 | out: |
6235 | return r; | |
6236 | } | |
b6c7a5dc | 6237 | |
09cec754 | 6238 | |
851ba692 | 6239 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
6240 | { |
6241 | int r; | |
f656ce01 | 6242 | struct kvm *kvm = vcpu->kvm; |
d7690175 | 6243 | |
f656ce01 | 6244 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 MT |
6245 | |
6246 | r = 1; | |
6247 | while (r > 0) { | |
af585b92 GN |
6248 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
6249 | !vcpu->arch.apf.halted) | |
851ba692 | 6250 | r = vcpu_enter_guest(vcpu); |
d7690175 | 6251 | else { |
f656ce01 | 6252 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
d7690175 | 6253 | kvm_vcpu_block(vcpu); |
f656ce01 | 6254 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
66450a21 JK |
6255 | if (kvm_check_request(KVM_REQ_UNHALT, vcpu)) { |
6256 | kvm_apic_accept_events(vcpu); | |
09cec754 GN |
6257 | switch(vcpu->arch.mp_state) { |
6258 | case KVM_MP_STATE_HALTED: | |
6aef266c | 6259 | vcpu->arch.pv.pv_unhalted = false; |
d7690175 | 6260 | vcpu->arch.mp_state = |
09cec754 GN |
6261 | KVM_MP_STATE_RUNNABLE; |
6262 | case KVM_MP_STATE_RUNNABLE: | |
af585b92 | 6263 | vcpu->arch.apf.halted = false; |
09cec754 | 6264 | break; |
66450a21 JK |
6265 | case KVM_MP_STATE_INIT_RECEIVED: |
6266 | break; | |
09cec754 GN |
6267 | default: |
6268 | r = -EINTR; | |
6269 | break; | |
6270 | } | |
6271 | } | |
d7690175 MT |
6272 | } |
6273 | ||
09cec754 GN |
6274 | if (r <= 0) |
6275 | break; | |
6276 | ||
6277 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
6278 | if (kvm_cpu_has_pending_timer(vcpu)) | |
6279 | kvm_inject_pending_timer_irqs(vcpu); | |
6280 | ||
851ba692 | 6281 | if (dm_request_for_irq_injection(vcpu)) { |
09cec754 | 6282 | r = -EINTR; |
851ba692 | 6283 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
6284 | ++vcpu->stat.request_irq_exits; |
6285 | } | |
af585b92 GN |
6286 | |
6287 | kvm_check_async_pf_completion(vcpu); | |
6288 | ||
09cec754 GN |
6289 | if (signal_pending(current)) { |
6290 | r = -EINTR; | |
851ba692 | 6291 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
6292 | ++vcpu->stat.signal_exits; |
6293 | } | |
6294 | if (need_resched()) { | |
f656ce01 | 6295 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
c08ac06a | 6296 | cond_resched(); |
f656ce01 | 6297 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 6298 | } |
b6c7a5dc HB |
6299 | } |
6300 | ||
f656ce01 | 6301 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc HB |
6302 | |
6303 | return r; | |
6304 | } | |
6305 | ||
716d51ab GN |
6306 | static inline int complete_emulated_io(struct kvm_vcpu *vcpu) |
6307 | { | |
6308 | int r; | |
6309 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
6310 | r = emulate_instruction(vcpu, EMULTYPE_NO_DECODE); | |
6311 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); | |
6312 | if (r != EMULATE_DONE) | |
6313 | return 0; | |
6314 | return 1; | |
6315 | } | |
6316 | ||
6317 | static int complete_emulated_pio(struct kvm_vcpu *vcpu) | |
6318 | { | |
6319 | BUG_ON(!vcpu->arch.pio.count); | |
6320 | ||
6321 | return complete_emulated_io(vcpu); | |
6322 | } | |
6323 | ||
f78146b0 AK |
6324 | /* |
6325 | * Implements the following, as a state machine: | |
6326 | * | |
6327 | * read: | |
6328 | * for each fragment | |
87da7e66 XG |
6329 | * for each mmio piece in the fragment |
6330 | * write gpa, len | |
6331 | * exit | |
6332 | * copy data | |
f78146b0 AK |
6333 | * execute insn |
6334 | * | |
6335 | * write: | |
6336 | * for each fragment | |
87da7e66 XG |
6337 | * for each mmio piece in the fragment |
6338 | * write gpa, len | |
6339 | * copy data | |
6340 | * exit | |
f78146b0 | 6341 | */ |
716d51ab | 6342 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu) |
5287f194 AK |
6343 | { |
6344 | struct kvm_run *run = vcpu->run; | |
f78146b0 | 6345 | struct kvm_mmio_fragment *frag; |
87da7e66 | 6346 | unsigned len; |
5287f194 | 6347 | |
716d51ab | 6348 | BUG_ON(!vcpu->mmio_needed); |
5287f194 | 6349 | |
716d51ab | 6350 | /* Complete previous fragment */ |
87da7e66 XG |
6351 | frag = &vcpu->mmio_fragments[vcpu->mmio_cur_fragment]; |
6352 | len = min(8u, frag->len); | |
716d51ab | 6353 | if (!vcpu->mmio_is_write) |
87da7e66 XG |
6354 | memcpy(frag->data, run->mmio.data, len); |
6355 | ||
6356 | if (frag->len <= 8) { | |
6357 | /* Switch to the next fragment. */ | |
6358 | frag++; | |
6359 | vcpu->mmio_cur_fragment++; | |
6360 | } else { | |
6361 | /* Go forward to the next mmio piece. */ | |
6362 | frag->data += len; | |
6363 | frag->gpa += len; | |
6364 | frag->len -= len; | |
6365 | } | |
6366 | ||
a08d3b3b | 6367 | if (vcpu->mmio_cur_fragment >= vcpu->mmio_nr_fragments) { |
716d51ab | 6368 | vcpu->mmio_needed = 0; |
0912c977 PB |
6369 | |
6370 | /* FIXME: return into emulator if single-stepping. */ | |
cef4dea0 | 6371 | if (vcpu->mmio_is_write) |
716d51ab GN |
6372 | return 1; |
6373 | vcpu->mmio_read_completed = 1; | |
6374 | return complete_emulated_io(vcpu); | |
6375 | } | |
87da7e66 | 6376 | |
716d51ab GN |
6377 | run->exit_reason = KVM_EXIT_MMIO; |
6378 | run->mmio.phys_addr = frag->gpa; | |
6379 | if (vcpu->mmio_is_write) | |
87da7e66 XG |
6380 | memcpy(run->mmio.data, frag->data, min(8u, frag->len)); |
6381 | run->mmio.len = min(8u, frag->len); | |
716d51ab GN |
6382 | run->mmio.is_write = vcpu->mmio_is_write; |
6383 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; | |
6384 | return 0; | |
5287f194 AK |
6385 | } |
6386 | ||
716d51ab | 6387 | |
b6c7a5dc HB |
6388 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
6389 | { | |
6390 | int r; | |
6391 | sigset_t sigsaved; | |
6392 | ||
e5c30142 AK |
6393 | if (!tsk_used_math(current) && init_fpu(current)) |
6394 | return -ENOMEM; | |
6395 | ||
ac9f6dc0 AK |
6396 | if (vcpu->sigset_active) |
6397 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
6398 | ||
a4535290 | 6399 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 6400 | kvm_vcpu_block(vcpu); |
66450a21 | 6401 | kvm_apic_accept_events(vcpu); |
d7690175 | 6402 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
6403 | r = -EAGAIN; |
6404 | goto out; | |
b6c7a5dc HB |
6405 | } |
6406 | ||
b6c7a5dc | 6407 | /* re-sync apic's tpr */ |
eea1cff9 AP |
6408 | if (!irqchip_in_kernel(vcpu->kvm)) { |
6409 | if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) { | |
6410 | r = -EINVAL; | |
6411 | goto out; | |
6412 | } | |
6413 | } | |
b6c7a5dc | 6414 | |
716d51ab GN |
6415 | if (unlikely(vcpu->arch.complete_userspace_io)) { |
6416 | int (*cui)(struct kvm_vcpu *) = vcpu->arch.complete_userspace_io; | |
6417 | vcpu->arch.complete_userspace_io = NULL; | |
6418 | r = cui(vcpu); | |
6419 | if (r <= 0) | |
6420 | goto out; | |
6421 | } else | |
6422 | WARN_ON(vcpu->arch.pio.count || vcpu->mmio_needed); | |
5287f194 | 6423 | |
851ba692 | 6424 | r = __vcpu_run(vcpu); |
b6c7a5dc HB |
6425 | |
6426 | out: | |
f1d86e46 | 6427 | post_kvm_run_save(vcpu); |
b6c7a5dc HB |
6428 | if (vcpu->sigset_active) |
6429 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
6430 | ||
b6c7a5dc HB |
6431 | return r; |
6432 | } | |
6433 | ||
6434 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
6435 | { | |
7ae441ea GN |
6436 | if (vcpu->arch.emulate_regs_need_sync_to_vcpu) { |
6437 | /* | |
6438 | * We are here if userspace calls get_regs() in the middle of | |
6439 | * instruction emulation. Registers state needs to be copied | |
4a969980 | 6440 | * back from emulation context to vcpu. Userspace shouldn't do |
7ae441ea GN |
6441 | * that usually, but some bad designed PV devices (vmware |
6442 | * backdoor interface) need this to work | |
6443 | */ | |
dd856efa | 6444 | emulator_writeback_register_cache(&vcpu->arch.emulate_ctxt); |
7ae441ea GN |
6445 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
6446 | } | |
5fdbf976 MT |
6447 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
6448 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
6449 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
6450 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
6451 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
6452 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
6453 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
6454 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 6455 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
6456 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
6457 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
6458 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
6459 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
6460 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
6461 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
6462 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
6463 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
6464 | #endif |
6465 | ||
5fdbf976 | 6466 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 6467 | regs->rflags = kvm_get_rflags(vcpu); |
b6c7a5dc | 6468 | |
b6c7a5dc HB |
6469 | return 0; |
6470 | } | |
6471 | ||
6472 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
6473 | { | |
7ae441ea GN |
6474 | vcpu->arch.emulate_regs_need_sync_from_vcpu = true; |
6475 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; | |
6476 | ||
5fdbf976 MT |
6477 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
6478 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
6479 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
6480 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
6481 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
6482 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
6483 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
6484 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 6485 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
6486 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
6487 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
6488 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
6489 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
6490 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
6491 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
6492 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
6493 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
6494 | #endif |
6495 | ||
5fdbf976 | 6496 | kvm_rip_write(vcpu, regs->rip); |
91586a3b | 6497 | kvm_set_rflags(vcpu, regs->rflags); |
b6c7a5dc | 6498 | |
b4f14abd JK |
6499 | vcpu->arch.exception.pending = false; |
6500 | ||
3842d135 AK |
6501 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
6502 | ||
b6c7a5dc HB |
6503 | return 0; |
6504 | } | |
6505 | ||
b6c7a5dc HB |
6506 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
6507 | { | |
6508 | struct kvm_segment cs; | |
6509 | ||
3e6e0aab | 6510 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
6511 | *db = cs.db; |
6512 | *l = cs.l; | |
6513 | } | |
6514 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
6515 | ||
6516 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
6517 | struct kvm_sregs *sregs) | |
6518 | { | |
89a27f4d | 6519 | struct desc_ptr dt; |
b6c7a5dc | 6520 | |
3e6e0aab GT |
6521 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
6522 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
6523 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
6524 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
6525 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
6526 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 6527 | |
3e6e0aab GT |
6528 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
6529 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
6530 | |
6531 | kvm_x86_ops->get_idt(vcpu, &dt); | |
89a27f4d GN |
6532 | sregs->idt.limit = dt.size; |
6533 | sregs->idt.base = dt.address; | |
b6c7a5dc | 6534 | kvm_x86_ops->get_gdt(vcpu, &dt); |
89a27f4d GN |
6535 | sregs->gdt.limit = dt.size; |
6536 | sregs->gdt.base = dt.address; | |
b6c7a5dc | 6537 | |
4d4ec087 | 6538 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c | 6539 | sregs->cr2 = vcpu->arch.cr2; |
9f8fe504 | 6540 | sregs->cr3 = kvm_read_cr3(vcpu); |
fc78f519 | 6541 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 6542 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 6543 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
6544 | sregs->apic_base = kvm_get_apic_base(vcpu); |
6545 | ||
923c61bb | 6546 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 6547 | |
36752c9b | 6548 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
6549 | set_bit(vcpu->arch.interrupt.nr, |
6550 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 6551 | |
b6c7a5dc HB |
6552 | return 0; |
6553 | } | |
6554 | ||
62d9f0db MT |
6555 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
6556 | struct kvm_mp_state *mp_state) | |
6557 | { | |
66450a21 | 6558 | kvm_apic_accept_events(vcpu); |
6aef266c SV |
6559 | if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED && |
6560 | vcpu->arch.pv.pv_unhalted) | |
6561 | mp_state->mp_state = KVM_MP_STATE_RUNNABLE; | |
6562 | else | |
6563 | mp_state->mp_state = vcpu->arch.mp_state; | |
6564 | ||
62d9f0db MT |
6565 | return 0; |
6566 | } | |
6567 | ||
6568 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
6569 | struct kvm_mp_state *mp_state) | |
6570 | { | |
66450a21 JK |
6571 | if (!kvm_vcpu_has_lapic(vcpu) && |
6572 | mp_state->mp_state != KVM_MP_STATE_RUNNABLE) | |
6573 | return -EINVAL; | |
6574 | ||
6575 | if (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED) { | |
6576 | vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; | |
6577 | set_bit(KVM_APIC_SIPI, &vcpu->arch.apic->pending_events); | |
6578 | } else | |
6579 | vcpu->arch.mp_state = mp_state->mp_state; | |
3842d135 | 6580 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
62d9f0db MT |
6581 | return 0; |
6582 | } | |
6583 | ||
7f3d35fd KW |
6584 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, |
6585 | int reason, bool has_error_code, u32 error_code) | |
b6c7a5dc | 6586 | { |
9d74191a | 6587 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d | 6588 | int ret; |
e01c2426 | 6589 | |
8ec4722d | 6590 | init_emulate_ctxt(vcpu); |
c697518a | 6591 | |
7f3d35fd | 6592 | ret = emulator_task_switch(ctxt, tss_selector, idt_index, reason, |
9d74191a | 6593 | has_error_code, error_code); |
c697518a | 6594 | |
c697518a | 6595 | if (ret) |
19d04437 | 6596 | return EMULATE_FAIL; |
37817f29 | 6597 | |
9d74191a TY |
6598 | kvm_rip_write(vcpu, ctxt->eip); |
6599 | kvm_set_rflags(vcpu, ctxt->eflags); | |
3842d135 | 6600 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
19d04437 | 6601 | return EMULATE_DONE; |
37817f29 IE |
6602 | } |
6603 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
6604 | ||
b6c7a5dc HB |
6605 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
6606 | struct kvm_sregs *sregs) | |
6607 | { | |
58cb628d | 6608 | struct msr_data apic_base_msr; |
b6c7a5dc | 6609 | int mmu_reset_needed = 0; |
63f42e02 | 6610 | int pending_vec, max_bits, idx; |
89a27f4d | 6611 | struct desc_ptr dt; |
b6c7a5dc | 6612 | |
6d1068b3 PM |
6613 | if (!guest_cpuid_has_xsave(vcpu) && (sregs->cr4 & X86_CR4_OSXSAVE)) |
6614 | return -EINVAL; | |
6615 | ||
89a27f4d GN |
6616 | dt.size = sregs->idt.limit; |
6617 | dt.address = sregs->idt.base; | |
b6c7a5dc | 6618 | kvm_x86_ops->set_idt(vcpu, &dt); |
89a27f4d GN |
6619 | dt.size = sregs->gdt.limit; |
6620 | dt.address = sregs->gdt.base; | |
b6c7a5dc HB |
6621 | kvm_x86_ops->set_gdt(vcpu, &dt); |
6622 | ||
ad312c7c | 6623 | vcpu->arch.cr2 = sregs->cr2; |
9f8fe504 | 6624 | mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3; |
dc7e795e | 6625 | vcpu->arch.cr3 = sregs->cr3; |
aff48baa | 6626 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
b6c7a5dc | 6627 | |
2d3ad1f4 | 6628 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 6629 | |
f6801dff | 6630 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 6631 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
58cb628d JK |
6632 | apic_base_msr.data = sregs->apic_base; |
6633 | apic_base_msr.host_initiated = true; | |
6634 | kvm_set_apic_base(vcpu, &apic_base_msr); | |
b6c7a5dc | 6635 | |
4d4ec087 | 6636 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 6637 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 6638 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 6639 | |
fc78f519 | 6640 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 6641 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
3ea3aa8c | 6642 | if (sregs->cr4 & X86_CR4_OSXSAVE) |
00b27a3e | 6643 | kvm_update_cpuid(vcpu); |
63f42e02 XG |
6644 | |
6645 | idx = srcu_read_lock(&vcpu->kvm->srcu); | |
7c93be44 | 6646 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
9f8fe504 | 6647 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); |
7c93be44 MT |
6648 | mmu_reset_needed = 1; |
6649 | } | |
63f42e02 | 6650 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b6c7a5dc HB |
6651 | |
6652 | if (mmu_reset_needed) | |
6653 | kvm_mmu_reset_context(vcpu); | |
6654 | ||
a50abc3b | 6655 | max_bits = KVM_NR_INTERRUPTS; |
923c61bb GN |
6656 | pending_vec = find_first_bit( |
6657 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
6658 | if (pending_vec < max_bits) { | |
66fd3f7f | 6659 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb | 6660 | pr_debug("Set back pending irq %d\n", pending_vec); |
b6c7a5dc HB |
6661 | } |
6662 | ||
3e6e0aab GT |
6663 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
6664 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
6665 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
6666 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
6667 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
6668 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 6669 | |
3e6e0aab GT |
6670 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
6671 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 6672 | |
5f0269f5 ME |
6673 | update_cr8_intercept(vcpu); |
6674 | ||
9c3e4aab | 6675 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 6676 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 6677 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 6678 | !is_protmode(vcpu)) |
9c3e4aab MT |
6679 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
6680 | ||
3842d135 AK |
6681 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
6682 | ||
b6c7a5dc HB |
6683 | return 0; |
6684 | } | |
6685 | ||
d0bfb940 JK |
6686 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
6687 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 6688 | { |
355be0b9 | 6689 | unsigned long rflags; |
ae675ef0 | 6690 | int i, r; |
b6c7a5dc | 6691 | |
4f926bf2 JK |
6692 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
6693 | r = -EBUSY; | |
6694 | if (vcpu->arch.exception.pending) | |
2122ff5e | 6695 | goto out; |
4f926bf2 JK |
6696 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
6697 | kvm_queue_exception(vcpu, DB_VECTOR); | |
6698 | else | |
6699 | kvm_queue_exception(vcpu, BP_VECTOR); | |
6700 | } | |
6701 | ||
91586a3b JK |
6702 | /* |
6703 | * Read rflags as long as potentially injected trace flags are still | |
6704 | * filtered out. | |
6705 | */ | |
6706 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
6707 | |
6708 | vcpu->guest_debug = dbg->control; | |
6709 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
6710 | vcpu->guest_debug = 0; | |
6711 | ||
6712 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
6713 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
6714 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
c8639010 | 6715 | vcpu->arch.guest_debug_dr7 = dbg->arch.debugreg[7]; |
ae675ef0 JK |
6716 | } else { |
6717 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
6718 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
ae675ef0 | 6719 | } |
c8639010 | 6720 | kvm_update_dr7(vcpu); |
ae675ef0 | 6721 | |
f92653ee JK |
6722 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
6723 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + | |
6724 | get_segment_base(vcpu, VCPU_SREG_CS); | |
94fe45da | 6725 | |
91586a3b JK |
6726 | /* |
6727 | * Trigger an rflags update that will inject or remove the trace | |
6728 | * flags. | |
6729 | */ | |
6730 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 6731 | |
c8639010 | 6732 | kvm_x86_ops->update_db_bp_intercept(vcpu); |
b6c7a5dc | 6733 | |
4f926bf2 | 6734 | r = 0; |
d0bfb940 | 6735 | |
2122ff5e | 6736 | out: |
b6c7a5dc HB |
6737 | |
6738 | return r; | |
6739 | } | |
6740 | ||
8b006791 ZX |
6741 | /* |
6742 | * Translate a guest virtual address to a guest physical address. | |
6743 | */ | |
6744 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
6745 | struct kvm_translation *tr) | |
6746 | { | |
6747 | unsigned long vaddr = tr->linear_address; | |
6748 | gpa_t gpa; | |
f656ce01 | 6749 | int idx; |
8b006791 | 6750 | |
f656ce01 | 6751 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 6752 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 6753 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
6754 | tr->physical_address = gpa; |
6755 | tr->valid = gpa != UNMAPPED_GVA; | |
6756 | tr->writeable = 1; | |
6757 | tr->usermode = 0; | |
8b006791 ZX |
6758 | |
6759 | return 0; | |
6760 | } | |
6761 | ||
d0752060 HB |
6762 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
6763 | { | |
98918833 SY |
6764 | struct i387_fxsave_struct *fxsave = |
6765 | &vcpu->arch.guest_fpu.state->fxsave; | |
d0752060 | 6766 | |
d0752060 HB |
6767 | memcpy(fpu->fpr, fxsave->st_space, 128); |
6768 | fpu->fcw = fxsave->cwd; | |
6769 | fpu->fsw = fxsave->swd; | |
6770 | fpu->ftwx = fxsave->twd; | |
6771 | fpu->last_opcode = fxsave->fop; | |
6772 | fpu->last_ip = fxsave->rip; | |
6773 | fpu->last_dp = fxsave->rdp; | |
6774 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
6775 | ||
d0752060 HB |
6776 | return 0; |
6777 | } | |
6778 | ||
6779 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
6780 | { | |
98918833 SY |
6781 | struct i387_fxsave_struct *fxsave = |
6782 | &vcpu->arch.guest_fpu.state->fxsave; | |
d0752060 | 6783 | |
d0752060 HB |
6784 | memcpy(fxsave->st_space, fpu->fpr, 128); |
6785 | fxsave->cwd = fpu->fcw; | |
6786 | fxsave->swd = fpu->fsw; | |
6787 | fxsave->twd = fpu->ftwx; | |
6788 | fxsave->fop = fpu->last_opcode; | |
6789 | fxsave->rip = fpu->last_ip; | |
6790 | fxsave->rdp = fpu->last_dp; | |
6791 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
6792 | ||
d0752060 HB |
6793 | return 0; |
6794 | } | |
6795 | ||
10ab25cd | 6796 | int fx_init(struct kvm_vcpu *vcpu) |
d0752060 | 6797 | { |
10ab25cd JK |
6798 | int err; |
6799 | ||
6800 | err = fpu_alloc(&vcpu->arch.guest_fpu); | |
6801 | if (err) | |
6802 | return err; | |
6803 | ||
98918833 | 6804 | fpu_finit(&vcpu->arch.guest_fpu); |
d0752060 | 6805 | |
2acf923e DC |
6806 | /* |
6807 | * Ensure guest xcr0 is valid for loading | |
6808 | */ | |
6809 | vcpu->arch.xcr0 = XSTATE_FP; | |
6810 | ||
ad312c7c | 6811 | vcpu->arch.cr0 |= X86_CR0_ET; |
10ab25cd JK |
6812 | |
6813 | return 0; | |
d0752060 HB |
6814 | } |
6815 | EXPORT_SYMBOL_GPL(fx_init); | |
6816 | ||
98918833 SY |
6817 | static void fx_free(struct kvm_vcpu *vcpu) |
6818 | { | |
6819 | fpu_free(&vcpu->arch.guest_fpu); | |
6820 | } | |
6821 | ||
d0752060 HB |
6822 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
6823 | { | |
2608d7a1 | 6824 | if (vcpu->guest_fpu_loaded) |
d0752060 HB |
6825 | return; |
6826 | ||
2acf923e DC |
6827 | /* |
6828 | * Restore all possible states in the guest, | |
6829 | * and assume host would use all available bits. | |
6830 | * Guest xcr0 would be loaded later. | |
6831 | */ | |
6832 | kvm_put_guest_xcr0(vcpu); | |
d0752060 | 6833 | vcpu->guest_fpu_loaded = 1; |
b1a74bf8 | 6834 | __kernel_fpu_begin(); |
98918833 | 6835 | fpu_restore_checking(&vcpu->arch.guest_fpu); |
0c04851c | 6836 | trace_kvm_fpu(1); |
d0752060 | 6837 | } |
d0752060 HB |
6838 | |
6839 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
6840 | { | |
2acf923e DC |
6841 | kvm_put_guest_xcr0(vcpu); |
6842 | ||
d0752060 HB |
6843 | if (!vcpu->guest_fpu_loaded) |
6844 | return; | |
6845 | ||
6846 | vcpu->guest_fpu_loaded = 0; | |
98918833 | 6847 | fpu_save_init(&vcpu->arch.guest_fpu); |
b1a74bf8 | 6848 | __kernel_fpu_end(); |
f096ed85 | 6849 | ++vcpu->stat.fpu_reload; |
a8eeb04a | 6850 | kvm_make_request(KVM_REQ_DEACTIVATE_FPU, vcpu); |
0c04851c | 6851 | trace_kvm_fpu(0); |
d0752060 | 6852 | } |
e9b11c17 ZX |
6853 | |
6854 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
6855 | { | |
12f9a48f | 6856 | kvmclock_reset(vcpu); |
7f1ea208 | 6857 | |
f5f48ee1 | 6858 | free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); |
98918833 | 6859 | fx_free(vcpu); |
e9b11c17 ZX |
6860 | kvm_x86_ops->vcpu_free(vcpu); |
6861 | } | |
6862 | ||
6863 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
6864 | unsigned int id) | |
6865 | { | |
6755bae8 ZA |
6866 | if (check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0) |
6867 | printk_once(KERN_WARNING | |
6868 | "kvm: SMP vm created on host with unstable TSC; " | |
6869 | "guest TSC will not be reliable\n"); | |
26e5215f AK |
6870 | return kvm_x86_ops->vcpu_create(kvm, id); |
6871 | } | |
e9b11c17 | 6872 | |
26e5215f AK |
6873 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
6874 | { | |
6875 | int r; | |
e9b11c17 | 6876 | |
0bed3b56 | 6877 | vcpu->arch.mtrr_state.have_fixed = 1; |
9fc77441 MT |
6878 | r = vcpu_load(vcpu); |
6879 | if (r) | |
6880 | return r; | |
57f252f2 | 6881 | kvm_vcpu_reset(vcpu); |
8a3c1a33 | 6882 | kvm_mmu_setup(vcpu); |
e9b11c17 | 6883 | vcpu_put(vcpu); |
e9b11c17 | 6884 | |
26e5215f | 6885 | return r; |
e9b11c17 ZX |
6886 | } |
6887 | ||
42897d86 MT |
6888 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
6889 | { | |
6890 | int r; | |
8fe8ab46 | 6891 | struct msr_data msr; |
332967a3 | 6892 | struct kvm *kvm = vcpu->kvm; |
42897d86 MT |
6893 | |
6894 | r = vcpu_load(vcpu); | |
6895 | if (r) | |
6896 | return r; | |
8fe8ab46 WA |
6897 | msr.data = 0x0; |
6898 | msr.index = MSR_IA32_TSC; | |
6899 | msr.host_initiated = true; | |
6900 | kvm_write_tsc(vcpu, &msr); | |
42897d86 MT |
6901 | vcpu_put(vcpu); |
6902 | ||
332967a3 AJ |
6903 | schedule_delayed_work(&kvm->arch.kvmclock_sync_work, |
6904 | KVMCLOCK_SYNC_PERIOD); | |
6905 | ||
42897d86 MT |
6906 | return r; |
6907 | } | |
6908 | ||
d40ccc62 | 6909 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 | 6910 | { |
9fc77441 | 6911 | int r; |
344d9588 GN |
6912 | vcpu->arch.apf.msr_val = 0; |
6913 | ||
9fc77441 MT |
6914 | r = vcpu_load(vcpu); |
6915 | BUG_ON(r); | |
e9b11c17 ZX |
6916 | kvm_mmu_unload(vcpu); |
6917 | vcpu_put(vcpu); | |
6918 | ||
98918833 | 6919 | fx_free(vcpu); |
e9b11c17 ZX |
6920 | kvm_x86_ops->vcpu_free(vcpu); |
6921 | } | |
6922 | ||
66450a21 | 6923 | void kvm_vcpu_reset(struct kvm_vcpu *vcpu) |
e9b11c17 | 6924 | { |
7460fb4a AK |
6925 | atomic_set(&vcpu->arch.nmi_queued, 0); |
6926 | vcpu->arch.nmi_pending = 0; | |
448fa4a9 | 6927 | vcpu->arch.nmi_injected = false; |
5f7552d4 NA |
6928 | kvm_clear_interrupt_queue(vcpu); |
6929 | kvm_clear_exception_queue(vcpu); | |
448fa4a9 | 6930 | |
42dbaa5a | 6931 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); |
6f43ed01 | 6932 | vcpu->arch.dr6 = DR6_INIT; |
73aaf249 | 6933 | kvm_update_dr6(vcpu); |
42dbaa5a | 6934 | vcpu->arch.dr7 = DR7_FIXED_1; |
c8639010 | 6935 | kvm_update_dr7(vcpu); |
42dbaa5a | 6936 | |
3842d135 | 6937 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
344d9588 | 6938 | vcpu->arch.apf.msr_val = 0; |
c9aaa895 | 6939 | vcpu->arch.st.msr_val = 0; |
3842d135 | 6940 | |
12f9a48f GC |
6941 | kvmclock_reset(vcpu); |
6942 | ||
af585b92 GN |
6943 | kvm_clear_async_pf_completion_queue(vcpu); |
6944 | kvm_async_pf_hash_reset(vcpu); | |
6945 | vcpu->arch.apf.halted = false; | |
3842d135 | 6946 | |
f5132b01 GN |
6947 | kvm_pmu_reset(vcpu); |
6948 | ||
66f7b72e JS |
6949 | memset(vcpu->arch.regs, 0, sizeof(vcpu->arch.regs)); |
6950 | vcpu->arch.regs_avail = ~0; | |
6951 | vcpu->arch.regs_dirty = ~0; | |
6952 | ||
57f252f2 | 6953 | kvm_x86_ops->vcpu_reset(vcpu); |
e9b11c17 ZX |
6954 | } |
6955 | ||
66450a21 JK |
6956 | void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, unsigned int vector) |
6957 | { | |
6958 | struct kvm_segment cs; | |
6959 | ||
6960 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
6961 | cs.selector = vector << 8; | |
6962 | cs.base = vector << 12; | |
6963 | kvm_set_segment(vcpu, &cs, VCPU_SREG_CS); | |
6964 | kvm_rip_write(vcpu, 0); | |
e9b11c17 ZX |
6965 | } |
6966 | ||
13a34e06 | 6967 | int kvm_arch_hardware_enable(void) |
e9b11c17 | 6968 | { |
ca84d1a2 ZA |
6969 | struct kvm *kvm; |
6970 | struct kvm_vcpu *vcpu; | |
6971 | int i; | |
0dd6a6ed ZA |
6972 | int ret; |
6973 | u64 local_tsc; | |
6974 | u64 max_tsc = 0; | |
6975 | bool stable, backwards_tsc = false; | |
18863bdd AK |
6976 | |
6977 | kvm_shared_msr_cpu_online(); | |
13a34e06 | 6978 | ret = kvm_x86_ops->hardware_enable(); |
0dd6a6ed ZA |
6979 | if (ret != 0) |
6980 | return ret; | |
6981 | ||
6982 | local_tsc = native_read_tsc(); | |
6983 | stable = !check_tsc_unstable(); | |
6984 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
6985 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
6986 | if (!stable && vcpu->cpu == smp_processor_id()) | |
6987 | set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); | |
6988 | if (stable && vcpu->arch.last_host_tsc > local_tsc) { | |
6989 | backwards_tsc = true; | |
6990 | if (vcpu->arch.last_host_tsc > max_tsc) | |
6991 | max_tsc = vcpu->arch.last_host_tsc; | |
6992 | } | |
6993 | } | |
6994 | } | |
6995 | ||
6996 | /* | |
6997 | * Sometimes, even reliable TSCs go backwards. This happens on | |
6998 | * platforms that reset TSC during suspend or hibernate actions, but | |
6999 | * maintain synchronization. We must compensate. Fortunately, we can | |
7000 | * detect that condition here, which happens early in CPU bringup, | |
7001 | * before any KVM threads can be running. Unfortunately, we can't | |
7002 | * bring the TSCs fully up to date with real time, as we aren't yet far | |
7003 | * enough into CPU bringup that we know how much real time has actually | |
7004 | * elapsed; our helper function, get_kernel_ns() will be using boot | |
7005 | * variables that haven't been updated yet. | |
7006 | * | |
7007 | * So we simply find the maximum observed TSC above, then record the | |
7008 | * adjustment to TSC in each VCPU. When the VCPU later gets loaded, | |
7009 | * the adjustment will be applied. Note that we accumulate | |
7010 | * adjustments, in case multiple suspend cycles happen before some VCPU | |
7011 | * gets a chance to run again. In the event that no KVM threads get a | |
7012 | * chance to run, we will miss the entire elapsed period, as we'll have | |
7013 | * reset last_host_tsc, so VCPUs will not have the TSC adjusted and may | |
7014 | * loose cycle time. This isn't too big a deal, since the loss will be | |
7015 | * uniform across all VCPUs (not to mention the scenario is extremely | |
7016 | * unlikely). It is possible that a second hibernate recovery happens | |
7017 | * much faster than a first, causing the observed TSC here to be | |
7018 | * smaller; this would require additional padding adjustment, which is | |
7019 | * why we set last_host_tsc to the local tsc observed here. | |
7020 | * | |
7021 | * N.B. - this code below runs only on platforms with reliable TSC, | |
7022 | * as that is the only way backwards_tsc is set above. Also note | |
7023 | * that this runs for ALL vcpus, which is not a bug; all VCPUs should | |
7024 | * have the same delta_cyc adjustment applied if backwards_tsc | |
7025 | * is detected. Note further, this adjustment is only done once, | |
7026 | * as we reset last_host_tsc on all VCPUs to stop this from being | |
7027 | * called multiple times (one for each physical CPU bringup). | |
7028 | * | |
4a969980 | 7029 | * Platforms with unreliable TSCs don't have to deal with this, they |
0dd6a6ed ZA |
7030 | * will be compensated by the logic in vcpu_load, which sets the TSC to |
7031 | * catchup mode. This will catchup all VCPUs to real time, but cannot | |
7032 | * guarantee that they stay in perfect synchronization. | |
7033 | */ | |
7034 | if (backwards_tsc) { | |
7035 | u64 delta_cyc = max_tsc - local_tsc; | |
16a96021 | 7036 | backwards_tsc_observed = true; |
0dd6a6ed ZA |
7037 | list_for_each_entry(kvm, &vm_list, vm_list) { |
7038 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
7039 | vcpu->arch.tsc_offset_adjustment += delta_cyc; | |
7040 | vcpu->arch.last_host_tsc = local_tsc; | |
d828199e MT |
7041 | set_bit(KVM_REQ_MASTERCLOCK_UPDATE, |
7042 | &vcpu->requests); | |
0dd6a6ed ZA |
7043 | } |
7044 | ||
7045 | /* | |
7046 | * We have to disable TSC offset matching.. if you were | |
7047 | * booting a VM while issuing an S4 host suspend.... | |
7048 | * you may have some problem. Solving this issue is | |
7049 | * left as an exercise to the reader. | |
7050 | */ | |
7051 | kvm->arch.last_tsc_nsec = 0; | |
7052 | kvm->arch.last_tsc_write = 0; | |
7053 | } | |
7054 | ||
7055 | } | |
7056 | return 0; | |
e9b11c17 ZX |
7057 | } |
7058 | ||
13a34e06 | 7059 | void kvm_arch_hardware_disable(void) |
e9b11c17 | 7060 | { |
13a34e06 RK |
7061 | kvm_x86_ops->hardware_disable(); |
7062 | drop_user_return_notifiers(); | |
e9b11c17 ZX |
7063 | } |
7064 | ||
7065 | int kvm_arch_hardware_setup(void) | |
7066 | { | |
7067 | return kvm_x86_ops->hardware_setup(); | |
7068 | } | |
7069 | ||
7070 | void kvm_arch_hardware_unsetup(void) | |
7071 | { | |
7072 | kvm_x86_ops->hardware_unsetup(); | |
7073 | } | |
7074 | ||
7075 | void kvm_arch_check_processor_compat(void *rtn) | |
7076 | { | |
7077 | kvm_x86_ops->check_processor_compatibility(rtn); | |
7078 | } | |
7079 | ||
3e515705 AK |
7080 | bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) |
7081 | { | |
7082 | return irqchip_in_kernel(vcpu->kvm) == (vcpu->arch.apic != NULL); | |
7083 | } | |
7084 | ||
54e9818f GN |
7085 | struct static_key kvm_no_apic_vcpu __read_mostly; |
7086 | ||
e9b11c17 ZX |
7087 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
7088 | { | |
7089 | struct page *page; | |
7090 | struct kvm *kvm; | |
7091 | int r; | |
7092 | ||
7093 | BUG_ON(vcpu->kvm == NULL); | |
7094 | kvm = vcpu->kvm; | |
7095 | ||
6aef266c | 7096 | vcpu->arch.pv.pv_unhalted = false; |
9aabc88f | 7097 | vcpu->arch.emulate_ctxt.ops = &emulate_ops; |
c5af89b6 | 7098 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) |
a4535290 | 7099 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 7100 | else |
a4535290 | 7101 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
7102 | |
7103 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
7104 | if (!page) { | |
7105 | r = -ENOMEM; | |
7106 | goto fail; | |
7107 | } | |
ad312c7c | 7108 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 | 7109 | |
cc578287 | 7110 | kvm_set_tsc_khz(vcpu, max_tsc_khz); |
c285545f | 7111 | |
e9b11c17 ZX |
7112 | r = kvm_mmu_create(vcpu); |
7113 | if (r < 0) | |
7114 | goto fail_free_pio_data; | |
7115 | ||
7116 | if (irqchip_in_kernel(kvm)) { | |
7117 | r = kvm_create_lapic(vcpu); | |
7118 | if (r < 0) | |
7119 | goto fail_mmu_destroy; | |
54e9818f GN |
7120 | } else |
7121 | static_key_slow_inc(&kvm_no_apic_vcpu); | |
e9b11c17 | 7122 | |
890ca9ae HY |
7123 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
7124 | GFP_KERNEL); | |
7125 | if (!vcpu->arch.mce_banks) { | |
7126 | r = -ENOMEM; | |
443c39bc | 7127 | goto fail_free_lapic; |
890ca9ae HY |
7128 | } |
7129 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
7130 | ||
f1797359 WY |
7131 | if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL)) { |
7132 | r = -ENOMEM; | |
f5f48ee1 | 7133 | goto fail_free_mce_banks; |
f1797359 | 7134 | } |
f5f48ee1 | 7135 | |
66f7b72e JS |
7136 | r = fx_init(vcpu); |
7137 | if (r) | |
7138 | goto fail_free_wbinvd_dirty_mask; | |
7139 | ||
ba904635 | 7140 | vcpu->arch.ia32_tsc_adjust_msr = 0x0; |
0b79459b | 7141 | vcpu->arch.pv_time_enabled = false; |
d7876f1b PB |
7142 | |
7143 | vcpu->arch.guest_supported_xcr0 = 0; | |
4344ee98 | 7144 | vcpu->arch.guest_xstate_size = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET; |
d7876f1b | 7145 | |
af585b92 | 7146 | kvm_async_pf_hash_reset(vcpu); |
f5132b01 | 7147 | kvm_pmu_init(vcpu); |
af585b92 | 7148 | |
e9b11c17 | 7149 | return 0; |
66f7b72e JS |
7150 | fail_free_wbinvd_dirty_mask: |
7151 | free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); | |
f5f48ee1 SY |
7152 | fail_free_mce_banks: |
7153 | kfree(vcpu->arch.mce_banks); | |
443c39bc WY |
7154 | fail_free_lapic: |
7155 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
7156 | fail_mmu_destroy: |
7157 | kvm_mmu_destroy(vcpu); | |
7158 | fail_free_pio_data: | |
ad312c7c | 7159 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
7160 | fail: |
7161 | return r; | |
7162 | } | |
7163 | ||
7164 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
7165 | { | |
f656ce01 MT |
7166 | int idx; |
7167 | ||
f5132b01 | 7168 | kvm_pmu_destroy(vcpu); |
36cb93fd | 7169 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 7170 | kvm_free_lapic(vcpu); |
f656ce01 | 7171 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 7172 | kvm_mmu_destroy(vcpu); |
f656ce01 | 7173 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 7174 | free_page((unsigned long)vcpu->arch.pio_data); |
54e9818f GN |
7175 | if (!irqchip_in_kernel(vcpu->kvm)) |
7176 | static_key_slow_dec(&kvm_no_apic_vcpu); | |
e9b11c17 | 7177 | } |
d19a9cd2 | 7178 | |
e790d9ef RK |
7179 | void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) |
7180 | { | |
ae97a3b8 | 7181 | kvm_x86_ops->sched_in(vcpu, cpu); |
e790d9ef RK |
7182 | } |
7183 | ||
e08b9637 | 7184 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
d19a9cd2 | 7185 | { |
e08b9637 CO |
7186 | if (type) |
7187 | return -EINVAL; | |
7188 | ||
f05e70ac | 7189 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
365c8868 | 7190 | INIT_LIST_HEAD(&kvm->arch.zapped_obsolete_pages); |
4d5c5d0f | 7191 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
e0f0bbc5 | 7192 | atomic_set(&kvm->arch.noncoherent_dma_count, 0); |
d19a9cd2 | 7193 | |
5550af4d SY |
7194 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
7195 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
7a84428a AW |
7196 | /* Reserve bit 1 of irq_sources_bitmap for irqfd-resampler */ |
7197 | set_bit(KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID, | |
7198 | &kvm->arch.irq_sources_bitmap); | |
5550af4d | 7199 | |
038f8c11 | 7200 | raw_spin_lock_init(&kvm->arch.tsc_write_lock); |
1e08ec4a | 7201 | mutex_init(&kvm->arch.apic_map_lock); |
d828199e MT |
7202 | spin_lock_init(&kvm->arch.pvclock_gtod_sync_lock); |
7203 | ||
7204 | pvclock_update_vm_gtod_copy(kvm); | |
53f658b3 | 7205 | |
7e44e449 | 7206 | INIT_DELAYED_WORK(&kvm->arch.kvmclock_update_work, kvmclock_update_fn); |
332967a3 | 7207 | INIT_DELAYED_WORK(&kvm->arch.kvmclock_sync_work, kvmclock_sync_fn); |
7e44e449 | 7208 | |
d89f5eff | 7209 | return 0; |
d19a9cd2 ZX |
7210 | } |
7211 | ||
7212 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
7213 | { | |
9fc77441 MT |
7214 | int r; |
7215 | r = vcpu_load(vcpu); | |
7216 | BUG_ON(r); | |
d19a9cd2 ZX |
7217 | kvm_mmu_unload(vcpu); |
7218 | vcpu_put(vcpu); | |
7219 | } | |
7220 | ||
7221 | static void kvm_free_vcpus(struct kvm *kvm) | |
7222 | { | |
7223 | unsigned int i; | |
988a2cae | 7224 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
7225 | |
7226 | /* | |
7227 | * Unpin any mmu pages first. | |
7228 | */ | |
af585b92 GN |
7229 | kvm_for_each_vcpu(i, vcpu, kvm) { |
7230 | kvm_clear_async_pf_completion_queue(vcpu); | |
988a2cae | 7231 | kvm_unload_vcpu_mmu(vcpu); |
af585b92 | 7232 | } |
988a2cae GN |
7233 | kvm_for_each_vcpu(i, vcpu, kvm) |
7234 | kvm_arch_vcpu_free(vcpu); | |
7235 | ||
7236 | mutex_lock(&kvm->lock); | |
7237 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
7238 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 7239 | |
988a2cae GN |
7240 | atomic_set(&kvm->online_vcpus, 0); |
7241 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
7242 | } |
7243 | ||
ad8ba2cd SY |
7244 | void kvm_arch_sync_events(struct kvm *kvm) |
7245 | { | |
332967a3 | 7246 | cancel_delayed_work_sync(&kvm->arch.kvmclock_sync_work); |
7e44e449 | 7247 | cancel_delayed_work_sync(&kvm->arch.kvmclock_update_work); |
ba4cef31 | 7248 | kvm_free_all_assigned_devices(kvm); |
aea924f6 | 7249 | kvm_free_pit(kvm); |
ad8ba2cd SY |
7250 | } |
7251 | ||
d19a9cd2 ZX |
7252 | void kvm_arch_destroy_vm(struct kvm *kvm) |
7253 | { | |
27469d29 AH |
7254 | if (current->mm == kvm->mm) { |
7255 | /* | |
7256 | * Free memory regions allocated on behalf of userspace, | |
7257 | * unless the the memory map has changed due to process exit | |
7258 | * or fd copying. | |
7259 | */ | |
7260 | struct kvm_userspace_memory_region mem; | |
7261 | memset(&mem, 0, sizeof(mem)); | |
7262 | mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT; | |
7263 | kvm_set_memory_region(kvm, &mem); | |
7264 | ||
7265 | mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT; | |
7266 | kvm_set_memory_region(kvm, &mem); | |
7267 | ||
7268 | mem.slot = TSS_PRIVATE_MEMSLOT; | |
7269 | kvm_set_memory_region(kvm, &mem); | |
7270 | } | |
6eb55818 | 7271 | kvm_iommu_unmap_guest(kvm); |
d7deeeb0 ZX |
7272 | kfree(kvm->arch.vpic); |
7273 | kfree(kvm->arch.vioapic); | |
d19a9cd2 | 7274 | kvm_free_vcpus(kvm); |
3d45830c AK |
7275 | if (kvm->arch.apic_access_page) |
7276 | put_page(kvm->arch.apic_access_page); | |
b7ebfb05 SY |
7277 | if (kvm->arch.ept_identity_pagetable) |
7278 | put_page(kvm->arch.ept_identity_pagetable); | |
1e08ec4a | 7279 | kfree(rcu_dereference_check(kvm->arch.apic_map, 1)); |
d19a9cd2 | 7280 | } |
0de10343 | 7281 | |
5587027c | 7282 | void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, |
db3fe4eb TY |
7283 | struct kvm_memory_slot *dont) |
7284 | { | |
7285 | int i; | |
7286 | ||
d89cc617 TY |
7287 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
7288 | if (!dont || free->arch.rmap[i] != dont->arch.rmap[i]) { | |
7289 | kvm_kvfree(free->arch.rmap[i]); | |
7290 | free->arch.rmap[i] = NULL; | |
77d11309 | 7291 | } |
d89cc617 TY |
7292 | if (i == 0) |
7293 | continue; | |
7294 | ||
7295 | if (!dont || free->arch.lpage_info[i - 1] != | |
7296 | dont->arch.lpage_info[i - 1]) { | |
7297 | kvm_kvfree(free->arch.lpage_info[i - 1]); | |
7298 | free->arch.lpage_info[i - 1] = NULL; | |
db3fe4eb TY |
7299 | } |
7300 | } | |
7301 | } | |
7302 | ||
5587027c AK |
7303 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
7304 | unsigned long npages) | |
db3fe4eb TY |
7305 | { |
7306 | int i; | |
7307 | ||
d89cc617 | 7308 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
db3fe4eb TY |
7309 | unsigned long ugfn; |
7310 | int lpages; | |
d89cc617 | 7311 | int level = i + 1; |
db3fe4eb TY |
7312 | |
7313 | lpages = gfn_to_index(slot->base_gfn + npages - 1, | |
7314 | slot->base_gfn, level) + 1; | |
7315 | ||
d89cc617 TY |
7316 | slot->arch.rmap[i] = |
7317 | kvm_kvzalloc(lpages * sizeof(*slot->arch.rmap[i])); | |
7318 | if (!slot->arch.rmap[i]) | |
77d11309 | 7319 | goto out_free; |
d89cc617 TY |
7320 | if (i == 0) |
7321 | continue; | |
77d11309 | 7322 | |
d89cc617 TY |
7323 | slot->arch.lpage_info[i - 1] = kvm_kvzalloc(lpages * |
7324 | sizeof(*slot->arch.lpage_info[i - 1])); | |
7325 | if (!slot->arch.lpage_info[i - 1]) | |
db3fe4eb TY |
7326 | goto out_free; |
7327 | ||
7328 | if (slot->base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1)) | |
d89cc617 | 7329 | slot->arch.lpage_info[i - 1][0].write_count = 1; |
db3fe4eb | 7330 | if ((slot->base_gfn + npages) & (KVM_PAGES_PER_HPAGE(level) - 1)) |
d89cc617 | 7331 | slot->arch.lpage_info[i - 1][lpages - 1].write_count = 1; |
db3fe4eb TY |
7332 | ugfn = slot->userspace_addr >> PAGE_SHIFT; |
7333 | /* | |
7334 | * If the gfn and userspace address are not aligned wrt each | |
7335 | * other, or if explicitly asked to, disable large page | |
7336 | * support for this slot | |
7337 | */ | |
7338 | if ((slot->base_gfn ^ ugfn) & (KVM_PAGES_PER_HPAGE(level) - 1) || | |
7339 | !kvm_largepages_enabled()) { | |
7340 | unsigned long j; | |
7341 | ||
7342 | for (j = 0; j < lpages; ++j) | |
d89cc617 | 7343 | slot->arch.lpage_info[i - 1][j].write_count = 1; |
db3fe4eb TY |
7344 | } |
7345 | } | |
7346 | ||
7347 | return 0; | |
7348 | ||
7349 | out_free: | |
d89cc617 TY |
7350 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
7351 | kvm_kvfree(slot->arch.rmap[i]); | |
7352 | slot->arch.rmap[i] = NULL; | |
7353 | if (i == 0) | |
7354 | continue; | |
7355 | ||
7356 | kvm_kvfree(slot->arch.lpage_info[i - 1]); | |
7357 | slot->arch.lpage_info[i - 1] = NULL; | |
db3fe4eb TY |
7358 | } |
7359 | return -ENOMEM; | |
7360 | } | |
7361 | ||
e59dbe09 TY |
7362 | void kvm_arch_memslots_updated(struct kvm *kvm) |
7363 | { | |
e6dff7d1 TY |
7364 | /* |
7365 | * memslots->generation has been incremented. | |
7366 | * mmio generation may have reached its maximum value. | |
7367 | */ | |
7368 | kvm_mmu_invalidate_mmio_sptes(kvm); | |
e59dbe09 TY |
7369 | } |
7370 | ||
f7784b8e MT |
7371 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
7372 | struct kvm_memory_slot *memslot, | |
f7784b8e | 7373 | struct kvm_userspace_memory_region *mem, |
7b6195a9 | 7374 | enum kvm_mr_change change) |
0de10343 | 7375 | { |
7a905b14 TY |
7376 | /* |
7377 | * Only private memory slots need to be mapped here since | |
7378 | * KVM_SET_MEMORY_REGION ioctl is no longer supported. | |
0de10343 | 7379 | */ |
7b6195a9 | 7380 | if ((memslot->id >= KVM_USER_MEM_SLOTS) && (change == KVM_MR_CREATE)) { |
7a905b14 | 7381 | unsigned long userspace_addr; |
604b38ac | 7382 | |
7a905b14 TY |
7383 | /* |
7384 | * MAP_SHARED to prevent internal slot pages from being moved | |
7385 | * by fork()/COW. | |
7386 | */ | |
7b6195a9 | 7387 | userspace_addr = vm_mmap(NULL, 0, memslot->npages * PAGE_SIZE, |
7a905b14 TY |
7388 | PROT_READ | PROT_WRITE, |
7389 | MAP_SHARED | MAP_ANONYMOUS, 0); | |
0de10343 | 7390 | |
7a905b14 TY |
7391 | if (IS_ERR((void *)userspace_addr)) |
7392 | return PTR_ERR((void *)userspace_addr); | |
604b38ac | 7393 | |
7a905b14 | 7394 | memslot->userspace_addr = userspace_addr; |
0de10343 ZX |
7395 | } |
7396 | ||
f7784b8e MT |
7397 | return 0; |
7398 | } | |
7399 | ||
7400 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
7401 | struct kvm_userspace_memory_region *mem, | |
8482644a TY |
7402 | const struct kvm_memory_slot *old, |
7403 | enum kvm_mr_change change) | |
f7784b8e MT |
7404 | { |
7405 | ||
8482644a | 7406 | int nr_mmu_pages = 0; |
f7784b8e | 7407 | |
8482644a | 7408 | if ((mem->slot >= KVM_USER_MEM_SLOTS) && (change == KVM_MR_DELETE)) { |
f7784b8e MT |
7409 | int ret; |
7410 | ||
8482644a TY |
7411 | ret = vm_munmap(old->userspace_addr, |
7412 | old->npages * PAGE_SIZE); | |
f7784b8e MT |
7413 | if (ret < 0) |
7414 | printk(KERN_WARNING | |
7415 | "kvm_vm_ioctl_set_memory_region: " | |
7416 | "failed to munmap memory\n"); | |
7417 | } | |
7418 | ||
48c0e4e9 XG |
7419 | if (!kvm->arch.n_requested_mmu_pages) |
7420 | nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); | |
7421 | ||
48c0e4e9 | 7422 | if (nr_mmu_pages) |
0de10343 | 7423 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); |
c972f3b1 TY |
7424 | /* |
7425 | * Write protect all pages for dirty logging. | |
c126d94f XG |
7426 | * |
7427 | * All the sptes including the large sptes which point to this | |
7428 | * slot are set to readonly. We can not create any new large | |
7429 | * spte on this slot until the end of the logging. | |
7430 | * | |
7431 | * See the comments in fast_page_fault(). | |
c972f3b1 | 7432 | */ |
8482644a | 7433 | if ((change != KVM_MR_DELETE) && (mem->flags & KVM_MEM_LOG_DIRTY_PAGES)) |
c972f3b1 | 7434 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); |
0de10343 | 7435 | } |
1d737c8a | 7436 | |
2df72e9b | 7437 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
34d4cb8f | 7438 | { |
6ca18b69 | 7439 | kvm_mmu_invalidate_zap_all_pages(kvm); |
34d4cb8f MT |
7440 | } |
7441 | ||
2df72e9b MT |
7442 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
7443 | struct kvm_memory_slot *slot) | |
7444 | { | |
6ca18b69 | 7445 | kvm_mmu_invalidate_zap_all_pages(kvm); |
2df72e9b MT |
7446 | } |
7447 | ||
1d737c8a ZX |
7448 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
7449 | { | |
b6b8a145 JK |
7450 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) |
7451 | kvm_x86_ops->check_nested_events(vcpu, false); | |
7452 | ||
af585b92 GN |
7453 | return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
7454 | !vcpu->arch.apf.halted) | |
7455 | || !list_empty_careful(&vcpu->async_pf.done) | |
66450a21 | 7456 | || kvm_apic_has_events(vcpu) |
6aef266c | 7457 | || vcpu->arch.pv.pv_unhalted |
7460fb4a | 7458 | || atomic_read(&vcpu->arch.nmi_queued) || |
a1b37100 GN |
7459 | (kvm_arch_interrupt_allowed(vcpu) && |
7460 | kvm_cpu_has_interrupt(vcpu)); | |
1d737c8a | 7461 | } |
5736199a | 7462 | |
b6d33834 | 7463 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
5736199a | 7464 | { |
b6d33834 | 7465 | return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; |
5736199a | 7466 | } |
78646121 GN |
7467 | |
7468 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
7469 | { | |
7470 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
7471 | } | |
229456fc | 7472 | |
f92653ee JK |
7473 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
7474 | { | |
7475 | unsigned long current_rip = kvm_rip_read(vcpu) + | |
7476 | get_segment_base(vcpu, VCPU_SREG_CS); | |
7477 | ||
7478 | return current_rip == linear_rip; | |
7479 | } | |
7480 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); | |
7481 | ||
94fe45da JK |
7482 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
7483 | { | |
7484 | unsigned long rflags; | |
7485 | ||
7486 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
7487 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
c310bac5 | 7488 | rflags &= ~X86_EFLAGS_TF; |
94fe45da JK |
7489 | return rflags; |
7490 | } | |
7491 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
7492 | ||
6addfc42 | 7493 | static void __kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) |
94fe45da JK |
7494 | { |
7495 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
f92653ee | 7496 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
c310bac5 | 7497 | rflags |= X86_EFLAGS_TF; |
94fe45da | 7498 | kvm_x86_ops->set_rflags(vcpu, rflags); |
6addfc42 PB |
7499 | } |
7500 | ||
7501 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
7502 | { | |
7503 | __kvm_set_rflags(vcpu, rflags); | |
3842d135 | 7504 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
94fe45da JK |
7505 | } |
7506 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
7507 | ||
56028d08 GN |
7508 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work) |
7509 | { | |
7510 | int r; | |
7511 | ||
fb67e14f | 7512 | if ((vcpu->arch.mmu.direct_map != work->arch.direct_map) || |
f2e10669 | 7513 | work->wakeup_all) |
56028d08 GN |
7514 | return; |
7515 | ||
7516 | r = kvm_mmu_reload(vcpu); | |
7517 | if (unlikely(r)) | |
7518 | return; | |
7519 | ||
fb67e14f XG |
7520 | if (!vcpu->arch.mmu.direct_map && |
7521 | work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu)) | |
7522 | return; | |
7523 | ||
56028d08 GN |
7524 | vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true); |
7525 | } | |
7526 | ||
af585b92 GN |
7527 | static inline u32 kvm_async_pf_hash_fn(gfn_t gfn) |
7528 | { | |
7529 | return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU)); | |
7530 | } | |
7531 | ||
7532 | static inline u32 kvm_async_pf_next_probe(u32 key) | |
7533 | { | |
7534 | return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1); | |
7535 | } | |
7536 | ||
7537 | static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
7538 | { | |
7539 | u32 key = kvm_async_pf_hash_fn(gfn); | |
7540 | ||
7541 | while (vcpu->arch.apf.gfns[key] != ~0) | |
7542 | key = kvm_async_pf_next_probe(key); | |
7543 | ||
7544 | vcpu->arch.apf.gfns[key] = gfn; | |
7545 | } | |
7546 | ||
7547 | static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn) | |
7548 | { | |
7549 | int i; | |
7550 | u32 key = kvm_async_pf_hash_fn(gfn); | |
7551 | ||
7552 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) && | |
c7d28c24 XG |
7553 | (vcpu->arch.apf.gfns[key] != gfn && |
7554 | vcpu->arch.apf.gfns[key] != ~0); i++) | |
af585b92 GN |
7555 | key = kvm_async_pf_next_probe(key); |
7556 | ||
7557 | return key; | |
7558 | } | |
7559 | ||
7560 | bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
7561 | { | |
7562 | return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn; | |
7563 | } | |
7564 | ||
7565 | static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
7566 | { | |
7567 | u32 i, j, k; | |
7568 | ||
7569 | i = j = kvm_async_pf_gfn_slot(vcpu, gfn); | |
7570 | while (true) { | |
7571 | vcpu->arch.apf.gfns[i] = ~0; | |
7572 | do { | |
7573 | j = kvm_async_pf_next_probe(j); | |
7574 | if (vcpu->arch.apf.gfns[j] == ~0) | |
7575 | return; | |
7576 | k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]); | |
7577 | /* | |
7578 | * k lies cyclically in ]i,j] | |
7579 | * | i.k.j | | |
7580 | * |....j i.k.| or |.k..j i...| | |
7581 | */ | |
7582 | } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j)); | |
7583 | vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j]; | |
7584 | i = j; | |
7585 | } | |
7586 | } | |
7587 | ||
7c90705b GN |
7588 | static int apf_put_user(struct kvm_vcpu *vcpu, u32 val) |
7589 | { | |
7590 | ||
7591 | return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val, | |
7592 | sizeof(val)); | |
7593 | } | |
7594 | ||
af585b92 GN |
7595 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
7596 | struct kvm_async_pf *work) | |
7597 | { | |
6389ee94 AK |
7598 | struct x86_exception fault; |
7599 | ||
7c90705b | 7600 | trace_kvm_async_pf_not_present(work->arch.token, work->gva); |
af585b92 | 7601 | kvm_add_async_pf_gfn(vcpu, work->arch.gfn); |
7c90705b GN |
7602 | |
7603 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) || | |
fc5f06fa GN |
7604 | (vcpu->arch.apf.send_user_only && |
7605 | kvm_x86_ops->get_cpl(vcpu) == 0)) | |
7c90705b GN |
7606 | kvm_make_request(KVM_REQ_APF_HALT, vcpu); |
7607 | else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) { | |
6389ee94 AK |
7608 | fault.vector = PF_VECTOR; |
7609 | fault.error_code_valid = true; | |
7610 | fault.error_code = 0; | |
7611 | fault.nested_page_fault = false; | |
7612 | fault.address = work->arch.token; | |
7613 | kvm_inject_page_fault(vcpu, &fault); | |
7c90705b | 7614 | } |
af585b92 GN |
7615 | } |
7616 | ||
7617 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
7618 | struct kvm_async_pf *work) | |
7619 | { | |
6389ee94 AK |
7620 | struct x86_exception fault; |
7621 | ||
7c90705b | 7622 | trace_kvm_async_pf_ready(work->arch.token, work->gva); |
f2e10669 | 7623 | if (work->wakeup_all) |
7c90705b GN |
7624 | work->arch.token = ~0; /* broadcast wakeup */ |
7625 | else | |
7626 | kvm_del_async_pf_gfn(vcpu, work->arch.gfn); | |
7627 | ||
7628 | if ((vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) && | |
7629 | !apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) { | |
6389ee94 AK |
7630 | fault.vector = PF_VECTOR; |
7631 | fault.error_code_valid = true; | |
7632 | fault.error_code = 0; | |
7633 | fault.nested_page_fault = false; | |
7634 | fault.address = work->arch.token; | |
7635 | kvm_inject_page_fault(vcpu, &fault); | |
7c90705b | 7636 | } |
e6d53e3b | 7637 | vcpu->arch.apf.halted = false; |
a4fa1635 | 7638 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
7c90705b GN |
7639 | } |
7640 | ||
7641 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
7642 | { | |
7643 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED)) | |
7644 | return true; | |
7645 | else | |
7646 | return !kvm_event_needs_reinjection(vcpu) && | |
7647 | kvm_x86_ops->interrupt_allowed(vcpu); | |
af585b92 GN |
7648 | } |
7649 | ||
e0f0bbc5 AW |
7650 | void kvm_arch_register_noncoherent_dma(struct kvm *kvm) |
7651 | { | |
7652 | atomic_inc(&kvm->arch.noncoherent_dma_count); | |
7653 | } | |
7654 | EXPORT_SYMBOL_GPL(kvm_arch_register_noncoherent_dma); | |
7655 | ||
7656 | void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm) | |
7657 | { | |
7658 | atomic_dec(&kvm->arch.noncoherent_dma_count); | |
7659 | } | |
7660 | EXPORT_SYMBOL_GPL(kvm_arch_unregister_noncoherent_dma); | |
7661 | ||
7662 | bool kvm_arch_has_noncoherent_dma(struct kvm *kvm) | |
7663 | { | |
7664 | return atomic_read(&kvm->arch.noncoherent_dma_count); | |
7665 | } | |
7666 | EXPORT_SYMBOL_GPL(kvm_arch_has_noncoherent_dma); | |
7667 | ||
229456fc MT |
7668 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
7669 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); | |
7670 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
7671 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
7672 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 7673 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 7674 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 7675 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 7676 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 7677 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 7678 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
2e554e8d | 7679 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |
489223ed | 7680 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_write_tsc_offset); |
7b46268d | 7681 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ple_window); |