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 | |
043405e1 CO |
9 | * |
10 | * Authors: | |
11 | * Avi Kivity <avi@qumranet.com> | |
12 | * Yaniv Kamay <yaniv@qumranet.com> | |
4d5c5d0f BAY |
13 | * Amit Shah <amit.shah@qumranet.com> |
14 | * Ben-Ami Yassour <benami@il.ibm.com> | |
043405e1 CO |
15 | * |
16 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
17 | * the COPYING file in the top-level directory. | |
18 | * | |
19 | */ | |
20 | ||
edf88417 | 21 | #include <linux/kvm_host.h> |
313a3dc7 | 22 | #include "irq.h" |
1d737c8a | 23 | #include "mmu.h" |
7837699f | 24 | #include "i8254.h" |
37817f29 | 25 | #include "tss.h" |
5fdbf976 | 26 | #include "kvm_cache_regs.h" |
26eef70c | 27 | #include "x86.h" |
313a3dc7 | 28 | |
18068523 | 29 | #include <linux/clocksource.h> |
4d5c5d0f | 30 | #include <linux/interrupt.h> |
313a3dc7 CO |
31 | #include <linux/kvm.h> |
32 | #include <linux/fs.h> | |
33 | #include <linux/vmalloc.h> | |
5fb76f9b | 34 | #include <linux/module.h> |
0de10343 | 35 | #include <linux/mman.h> |
2bacc55c | 36 | #include <linux/highmem.h> |
19de40a8 | 37 | #include <linux/iommu.h> |
62c476c7 | 38 | #include <linux/intel-iommu.h> |
c8076604 | 39 | #include <linux/cpufreq.h> |
18863bdd | 40 | #include <linux/user-return-notifier.h> |
a983fb23 | 41 | #include <linux/srcu.h> |
5a0e3ad6 | 42 | #include <linux/slab.h> |
aec51dc4 AK |
43 | #include <trace/events/kvm.h> |
44 | #undef TRACE_INCLUDE_FILE | |
229456fc MT |
45 | #define CREATE_TRACE_POINTS |
46 | #include "trace.h" | |
043405e1 | 47 | |
24f1e32c | 48 | #include <asm/debugreg.h> |
043405e1 | 49 | #include <asm/uaccess.h> |
d825ed0a | 50 | #include <asm/msr.h> |
a5f61300 | 51 | #include <asm/desc.h> |
0bed3b56 | 52 | #include <asm/mtrr.h> |
890ca9ae | 53 | #include <asm/mce.h> |
043405e1 | 54 | |
313a3dc7 | 55 | #define MAX_IO_MSRS 256 |
a03490ed CO |
56 | #define CR0_RESERVED_BITS \ |
57 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ | |
58 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ | |
59 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) | |
60 | #define CR4_RESERVED_BITS \ | |
61 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ | |
62 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ | |
63 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
64 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) | |
65 | ||
66 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) | |
890ca9ae HY |
67 | |
68 | #define KVM_MAX_MCE_BANKS 32 | |
69 | #define KVM_MCE_CAP_SUPPORTED MCG_CTL_P | |
70 | ||
50a37eb4 JR |
71 | /* EFER defaults: |
72 | * - enable syscall per default because its emulated by KVM | |
73 | * - enable LME and LMA per default on 64 bit KVM | |
74 | */ | |
75 | #ifdef CONFIG_X86_64 | |
76 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL; | |
77 | #else | |
78 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL; | |
79 | #endif | |
313a3dc7 | 80 | |
ba1389b7 AK |
81 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
82 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 83 | |
cb142eb7 | 84 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
674eea0f AK |
85 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
86 | struct kvm_cpuid_entry2 __user *entries); | |
87 | ||
97896d04 | 88 | struct kvm_x86_ops *kvm_x86_ops; |
5fdbf976 | 89 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 90 | |
ed85c068 AP |
91 | int ignore_msrs = 0; |
92 | module_param_named(ignore_msrs, ignore_msrs, bool, S_IRUGO | S_IWUSR); | |
93 | ||
18863bdd AK |
94 | #define KVM_NR_SHARED_MSRS 16 |
95 | ||
96 | struct kvm_shared_msrs_global { | |
97 | int nr; | |
2bf78fa7 | 98 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
99 | }; |
100 | ||
101 | struct kvm_shared_msrs { | |
102 | struct user_return_notifier urn; | |
103 | bool registered; | |
2bf78fa7 SY |
104 | struct kvm_shared_msr_values { |
105 | u64 host; | |
106 | u64 curr; | |
107 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
108 | }; |
109 | ||
110 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
111 | static DEFINE_PER_CPU(struct kvm_shared_msrs, shared_msrs); | |
112 | ||
417bc304 | 113 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
114 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
115 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
116 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
117 | { "invlpg", VCPU_STAT(invlpg) }, | |
118 | { "exits", VCPU_STAT(exits) }, | |
119 | { "io_exits", VCPU_STAT(io_exits) }, | |
120 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
121 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
122 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 123 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 AK |
124 | { "halt_exits", VCPU_STAT(halt_exits) }, |
125 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, | |
f11c3a8d | 126 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
127 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
128 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
129 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
130 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
131 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
132 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
133 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 134 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 135 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
136 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
137 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
138 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
139 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
140 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
141 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 142 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 143 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 144 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 145 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
146 | { NULL } |
147 | }; | |
148 | ||
18863bdd AK |
149 | static void kvm_on_user_return(struct user_return_notifier *urn) |
150 | { | |
151 | unsigned slot; | |
18863bdd AK |
152 | struct kvm_shared_msrs *locals |
153 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 154 | struct kvm_shared_msr_values *values; |
18863bdd AK |
155 | |
156 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { | |
2bf78fa7 SY |
157 | values = &locals->values[slot]; |
158 | if (values->host != values->curr) { | |
159 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
160 | values->curr = values->host; | |
18863bdd AK |
161 | } |
162 | } | |
163 | locals->registered = false; | |
164 | user_return_notifier_unregister(urn); | |
165 | } | |
166 | ||
2bf78fa7 | 167 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 168 | { |
2bf78fa7 | 169 | struct kvm_shared_msrs *smsr; |
18863bdd AK |
170 | u64 value; |
171 | ||
2bf78fa7 SY |
172 | smsr = &__get_cpu_var(shared_msrs); |
173 | /* only read, and nobody should modify it at this time, | |
174 | * so don't need lock */ | |
175 | if (slot >= shared_msrs_global.nr) { | |
176 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
177 | return; | |
178 | } | |
179 | rdmsrl_safe(msr, &value); | |
180 | smsr->values[slot].host = value; | |
181 | smsr->values[slot].curr = value; | |
182 | } | |
183 | ||
184 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
185 | { | |
18863bdd AK |
186 | if (slot >= shared_msrs_global.nr) |
187 | shared_msrs_global.nr = slot + 1; | |
2bf78fa7 SY |
188 | shared_msrs_global.msrs[slot] = msr; |
189 | /* we need ensured the shared_msr_global have been updated */ | |
190 | smp_wmb(); | |
18863bdd AK |
191 | } |
192 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
193 | ||
194 | static void kvm_shared_msr_cpu_online(void) | |
195 | { | |
196 | unsigned i; | |
18863bdd AK |
197 | |
198 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 199 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
200 | } |
201 | ||
d5696725 | 202 | void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd AK |
203 | { |
204 | struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs); | |
205 | ||
2bf78fa7 | 206 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
18863bdd | 207 | return; |
2bf78fa7 SY |
208 | smsr->values[slot].curr = value; |
209 | wrmsrl(shared_msrs_global.msrs[slot], value); | |
18863bdd AK |
210 | if (!smsr->registered) { |
211 | smsr->urn.on_user_return = kvm_on_user_return; | |
212 | user_return_notifier_register(&smsr->urn); | |
213 | smsr->registered = true; | |
214 | } | |
215 | } | |
216 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
217 | ||
3548bab5 AK |
218 | static void drop_user_return_notifiers(void *ignore) |
219 | { | |
220 | struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs); | |
221 | ||
222 | if (smsr->registered) | |
223 | kvm_on_user_return(&smsr->urn); | |
224 | } | |
225 | ||
5fb76f9b CO |
226 | unsigned long segment_base(u16 selector) |
227 | { | |
228 | struct descriptor_table gdt; | |
a5f61300 | 229 | struct desc_struct *d; |
5fb76f9b CO |
230 | unsigned long table_base; |
231 | unsigned long v; | |
232 | ||
233 | if (selector == 0) | |
234 | return 0; | |
235 | ||
b792c344 | 236 | kvm_get_gdt(&gdt); |
5fb76f9b CO |
237 | table_base = gdt.base; |
238 | ||
239 | if (selector & 4) { /* from ldt */ | |
b792c344 | 240 | u16 ldt_selector = kvm_read_ldt(); |
5fb76f9b | 241 | |
5fb76f9b CO |
242 | table_base = segment_base(ldt_selector); |
243 | } | |
a5f61300 | 244 | d = (struct desc_struct *)(table_base + (selector & ~7)); |
46a359e7 | 245 | v = get_desc_base(d); |
5fb76f9b | 246 | #ifdef CONFIG_X86_64 |
a5f61300 AK |
247 | if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) |
248 | v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32; | |
5fb76f9b CO |
249 | #endif |
250 | return v; | |
251 | } | |
252 | EXPORT_SYMBOL_GPL(segment_base); | |
253 | ||
6866b83e CO |
254 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
255 | { | |
256 | if (irqchip_in_kernel(vcpu->kvm)) | |
ad312c7c | 257 | return vcpu->arch.apic_base; |
6866b83e | 258 | else |
ad312c7c | 259 | return vcpu->arch.apic_base; |
6866b83e CO |
260 | } |
261 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
262 | ||
263 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) | |
264 | { | |
265 | /* TODO: reserve bits check */ | |
266 | if (irqchip_in_kernel(vcpu->kvm)) | |
267 | kvm_lapic_set_base(vcpu, data); | |
268 | else | |
ad312c7c | 269 | vcpu->arch.apic_base = data; |
6866b83e CO |
270 | } |
271 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
272 | ||
3fd28fce ED |
273 | #define EXCPT_BENIGN 0 |
274 | #define EXCPT_CONTRIBUTORY 1 | |
275 | #define EXCPT_PF 2 | |
276 | ||
277 | static int exception_class(int vector) | |
278 | { | |
279 | switch (vector) { | |
280 | case PF_VECTOR: | |
281 | return EXCPT_PF; | |
282 | case DE_VECTOR: | |
283 | case TS_VECTOR: | |
284 | case NP_VECTOR: | |
285 | case SS_VECTOR: | |
286 | case GP_VECTOR: | |
287 | return EXCPT_CONTRIBUTORY; | |
288 | default: | |
289 | break; | |
290 | } | |
291 | return EXCPT_BENIGN; | |
292 | } | |
293 | ||
294 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, | |
295 | unsigned nr, bool has_error, u32 error_code) | |
296 | { | |
297 | u32 prev_nr; | |
298 | int class1, class2; | |
299 | ||
300 | if (!vcpu->arch.exception.pending) { | |
301 | queue: | |
302 | vcpu->arch.exception.pending = true; | |
303 | vcpu->arch.exception.has_error_code = has_error; | |
304 | vcpu->arch.exception.nr = nr; | |
305 | vcpu->arch.exception.error_code = error_code; | |
306 | return; | |
307 | } | |
308 | ||
309 | /* to check exception */ | |
310 | prev_nr = vcpu->arch.exception.nr; | |
311 | if (prev_nr == DF_VECTOR) { | |
312 | /* triple fault -> shutdown */ | |
313 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); | |
314 | return; | |
315 | } | |
316 | class1 = exception_class(prev_nr); | |
317 | class2 = exception_class(nr); | |
318 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
319 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
320 | /* generate double fault per SDM Table 5-5 */ | |
321 | vcpu->arch.exception.pending = true; | |
322 | vcpu->arch.exception.has_error_code = true; | |
323 | vcpu->arch.exception.nr = DF_VECTOR; | |
324 | vcpu->arch.exception.error_code = 0; | |
325 | } else | |
326 | /* replace previous exception with a new one in a hope | |
327 | that instruction re-execution will regenerate lost | |
328 | exception */ | |
329 | goto queue; | |
330 | } | |
331 | ||
298101da AK |
332 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
333 | { | |
3fd28fce | 334 | kvm_multiple_exception(vcpu, nr, false, 0); |
298101da AK |
335 | } |
336 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
337 | ||
c3c91fee AK |
338 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr, |
339 | u32 error_code) | |
340 | { | |
341 | ++vcpu->stat.pf_guest; | |
ad312c7c | 342 | vcpu->arch.cr2 = addr; |
c3c91fee AK |
343 | kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); |
344 | } | |
345 | ||
3419ffc8 SY |
346 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
347 | { | |
348 | vcpu->arch.nmi_pending = 1; | |
349 | } | |
350 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
351 | ||
298101da AK |
352 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
353 | { | |
3fd28fce | 354 | kvm_multiple_exception(vcpu, nr, true, error_code); |
298101da AK |
355 | } |
356 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
357 | ||
0a79b009 AK |
358 | /* |
359 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
360 | * a #GP and return false. | |
361 | */ | |
362 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 363 | { |
0a79b009 AK |
364 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
365 | return true; | |
366 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
367 | return false; | |
298101da | 368 | } |
0a79b009 | 369 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 370 | |
a03490ed CO |
371 | /* |
372 | * Load the pae pdptrs. Return true is they are all valid. | |
373 | */ | |
374 | int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
375 | { | |
376 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
377 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
378 | int i; | |
379 | int ret; | |
ad312c7c | 380 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
a03490ed | 381 | |
a03490ed CO |
382 | ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte, |
383 | offset * sizeof(u64), sizeof(pdpte)); | |
384 | if (ret < 0) { | |
385 | ret = 0; | |
386 | goto out; | |
387 | } | |
388 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
43a3795a | 389 | if (is_present_gpte(pdpte[i]) && |
20c466b5 | 390 | (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) { |
a03490ed CO |
391 | ret = 0; |
392 | goto out; | |
393 | } | |
394 | } | |
395 | ret = 1; | |
396 | ||
ad312c7c | 397 | memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs)); |
6de4f3ad AK |
398 | __set_bit(VCPU_EXREG_PDPTR, |
399 | (unsigned long *)&vcpu->arch.regs_avail); | |
400 | __set_bit(VCPU_EXREG_PDPTR, | |
401 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 402 | out: |
a03490ed CO |
403 | |
404 | return ret; | |
405 | } | |
cc4b6871 | 406 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 407 | |
d835dfec AK |
408 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
409 | { | |
ad312c7c | 410 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
d835dfec AK |
411 | bool changed = true; |
412 | int r; | |
413 | ||
414 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
415 | return false; | |
416 | ||
6de4f3ad AK |
417 | if (!test_bit(VCPU_EXREG_PDPTR, |
418 | (unsigned long *)&vcpu->arch.regs_avail)) | |
419 | return true; | |
420 | ||
ad312c7c | 421 | r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte)); |
d835dfec AK |
422 | if (r < 0) |
423 | goto out; | |
ad312c7c | 424 | changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 425 | out: |
d835dfec AK |
426 | |
427 | return changed; | |
428 | } | |
429 | ||
2d3ad1f4 | 430 | void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed | 431 | { |
f9a48e6a AK |
432 | cr0 |= X86_CR0_ET; |
433 | ||
ab344828 GN |
434 | #ifdef CONFIG_X86_64 |
435 | if (cr0 & 0xffffffff00000000UL) { | |
c1a5d4f9 | 436 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
437 | return; |
438 | } | |
ab344828 GN |
439 | #endif |
440 | ||
441 | cr0 &= ~CR0_RESERVED_BITS; | |
a03490ed CO |
442 | |
443 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) { | |
c1a5d4f9 | 444 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
445 | return; |
446 | } | |
447 | ||
448 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) { | |
c1a5d4f9 | 449 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
450 | return; |
451 | } | |
452 | ||
453 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
454 | #ifdef CONFIG_X86_64 | |
f6801dff | 455 | if ((vcpu->arch.efer & EFER_LME)) { |
a03490ed CO |
456 | int cs_db, cs_l; |
457 | ||
458 | if (!is_pae(vcpu)) { | |
c1a5d4f9 | 459 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
460 | return; |
461 | } | |
462 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
463 | if (cs_l) { | |
c1a5d4f9 | 464 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
465 | return; |
466 | ||
467 | } | |
468 | } else | |
469 | #endif | |
ad312c7c | 470 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
c1a5d4f9 | 471 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
472 | return; |
473 | } | |
474 | ||
475 | } | |
476 | ||
477 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
ad312c7c | 478 | vcpu->arch.cr0 = cr0; |
a03490ed | 479 | |
a03490ed | 480 | kvm_mmu_reset_context(vcpu); |
a03490ed CO |
481 | return; |
482 | } | |
2d3ad1f4 | 483 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 484 | |
2d3ad1f4 | 485 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 486 | { |
4d4ec087 | 487 | kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0ful) | (msw & 0x0f)); |
a03490ed | 488 | } |
2d3ad1f4 | 489 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 490 | |
2d3ad1f4 | 491 | void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 492 | { |
fc78f519 | 493 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
a2edf57f AK |
494 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE; |
495 | ||
a03490ed | 496 | if (cr4 & CR4_RESERVED_BITS) { |
c1a5d4f9 | 497 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
498 | return; |
499 | } | |
500 | ||
501 | if (is_long_mode(vcpu)) { | |
502 | if (!(cr4 & X86_CR4_PAE)) { | |
c1a5d4f9 | 503 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
504 | return; |
505 | } | |
a2edf57f AK |
506 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
507 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
ad312c7c | 508 | && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
c1a5d4f9 | 509 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
510 | return; |
511 | } | |
512 | ||
513 | if (cr4 & X86_CR4_VMXE) { | |
c1a5d4f9 | 514 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
515 | return; |
516 | } | |
517 | kvm_x86_ops->set_cr4(vcpu, cr4); | |
ad312c7c | 518 | vcpu->arch.cr4 = cr4; |
5a41accd | 519 | vcpu->arch.mmu.base_role.cr4_pge = (cr4 & X86_CR4_PGE) && !tdp_enabled; |
a03490ed | 520 | kvm_mmu_reset_context(vcpu); |
a03490ed | 521 | } |
2d3ad1f4 | 522 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 523 | |
2d3ad1f4 | 524 | void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 525 | { |
ad312c7c | 526 | if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) { |
0ba73cda | 527 | kvm_mmu_sync_roots(vcpu); |
d835dfec AK |
528 | kvm_mmu_flush_tlb(vcpu); |
529 | return; | |
530 | } | |
531 | ||
a03490ed CO |
532 | if (is_long_mode(vcpu)) { |
533 | if (cr3 & CR3_L_MODE_RESERVED_BITS) { | |
c1a5d4f9 | 534 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
535 | return; |
536 | } | |
537 | } else { | |
538 | if (is_pae(vcpu)) { | |
539 | if (cr3 & CR3_PAE_RESERVED_BITS) { | |
c1a5d4f9 | 540 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
541 | return; |
542 | } | |
543 | if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) { | |
c1a5d4f9 | 544 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
545 | return; |
546 | } | |
547 | } | |
548 | /* | |
549 | * We don't check reserved bits in nonpae mode, because | |
550 | * this isn't enforced, and VMware depends on this. | |
551 | */ | |
552 | } | |
553 | ||
a03490ed CO |
554 | /* |
555 | * Does the new cr3 value map to physical memory? (Note, we | |
556 | * catch an invalid cr3 even in real-mode, because it would | |
557 | * cause trouble later on when we turn on paging anyway.) | |
558 | * | |
559 | * A real CPU would silently accept an invalid cr3 and would | |
560 | * attempt to use it - with largely undefined (and often hard | |
561 | * to debug) behavior on the guest side. | |
562 | */ | |
563 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
c1a5d4f9 | 564 | kvm_inject_gp(vcpu, 0); |
a03490ed | 565 | else { |
ad312c7c ZX |
566 | vcpu->arch.cr3 = cr3; |
567 | vcpu->arch.mmu.new_cr3(vcpu); | |
a03490ed | 568 | } |
a03490ed | 569 | } |
2d3ad1f4 | 570 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 571 | |
2d3ad1f4 | 572 | void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed CO |
573 | { |
574 | if (cr8 & CR8_RESERVED_BITS) { | |
c1a5d4f9 | 575 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
576 | return; |
577 | } | |
578 | if (irqchip_in_kernel(vcpu->kvm)) | |
579 | kvm_lapic_set_tpr(vcpu, cr8); | |
580 | else | |
ad312c7c | 581 | vcpu->arch.cr8 = cr8; |
a03490ed | 582 | } |
2d3ad1f4 | 583 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 584 | |
2d3ad1f4 | 585 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed CO |
586 | { |
587 | if (irqchip_in_kernel(vcpu->kvm)) | |
588 | return kvm_lapic_get_cr8(vcpu); | |
589 | else | |
ad312c7c | 590 | return vcpu->arch.cr8; |
a03490ed | 591 | } |
2d3ad1f4 | 592 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 593 | |
d8017474 AG |
594 | static inline u32 bit(int bitno) |
595 | { | |
596 | return 1 << (bitno & 31); | |
597 | } | |
598 | ||
043405e1 CO |
599 | /* |
600 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
601 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
602 | * | |
603 | * This list is modified at module load time to reflect the | |
e3267cbb GC |
604 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
605 | * kvm-specific. Those are put in the beginning of the list. | |
043405e1 | 606 | */ |
e3267cbb | 607 | |
10388a07 | 608 | #define KVM_SAVE_MSRS_BEGIN 5 |
043405e1 | 609 | static u32 msrs_to_save[] = { |
e3267cbb | 610 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
55cd8e5a | 611 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, |
10388a07 | 612 | HV_X64_MSR_APIC_ASSIST_PAGE, |
043405e1 CO |
613 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, |
614 | MSR_K6_STAR, | |
615 | #ifdef CONFIG_X86_64 | |
616 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
617 | #endif | |
e3267cbb | 618 | MSR_IA32_TSC, MSR_IA32_PERF_STATUS, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA |
043405e1 CO |
619 | }; |
620 | ||
621 | static unsigned num_msrs_to_save; | |
622 | ||
623 | static u32 emulated_msrs[] = { | |
624 | MSR_IA32_MISC_ENABLE, | |
625 | }; | |
626 | ||
15c4a640 CO |
627 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
628 | { | |
f2b4b7dd | 629 | if (efer & efer_reserved_bits) { |
c1a5d4f9 | 630 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
631 | return; |
632 | } | |
633 | ||
634 | if (is_paging(vcpu) | |
f6801dff | 635 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) { |
c1a5d4f9 | 636 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
637 | return; |
638 | } | |
639 | ||
1b2fd70c AG |
640 | if (efer & EFER_FFXSR) { |
641 | struct kvm_cpuid_entry2 *feat; | |
642 | ||
643 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
644 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) { | |
1b2fd70c AG |
645 | kvm_inject_gp(vcpu, 0); |
646 | return; | |
647 | } | |
648 | } | |
649 | ||
d8017474 AG |
650 | if (efer & EFER_SVME) { |
651 | struct kvm_cpuid_entry2 *feat; | |
652 | ||
653 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
654 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) { | |
d8017474 AG |
655 | kvm_inject_gp(vcpu, 0); |
656 | return; | |
657 | } | |
658 | } | |
659 | ||
15c4a640 CO |
660 | kvm_x86_ops->set_efer(vcpu, efer); |
661 | ||
662 | efer &= ~EFER_LMA; | |
f6801dff | 663 | efer |= vcpu->arch.efer & EFER_LMA; |
15c4a640 | 664 | |
f6801dff | 665 | vcpu->arch.efer = efer; |
9645bb56 AK |
666 | |
667 | vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled; | |
668 | kvm_mmu_reset_context(vcpu); | |
15c4a640 CO |
669 | } |
670 | ||
f2b4b7dd JR |
671 | void kvm_enable_efer_bits(u64 mask) |
672 | { | |
673 | efer_reserved_bits &= ~mask; | |
674 | } | |
675 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
676 | ||
677 | ||
15c4a640 CO |
678 | /* |
679 | * Writes msr value into into the appropriate "register". | |
680 | * Returns 0 on success, non-0 otherwise. | |
681 | * Assumes vcpu_load() was already called. | |
682 | */ | |
683 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
684 | { | |
685 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); | |
686 | } | |
687 | ||
313a3dc7 CO |
688 | /* |
689 | * Adapt set_msr() to msr_io()'s calling convention | |
690 | */ | |
691 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
692 | { | |
693 | return kvm_set_msr(vcpu, index, *data); | |
694 | } | |
695 | ||
18068523 GOC |
696 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
697 | { | |
698 | static int version; | |
50d0a0f9 | 699 | struct pvclock_wall_clock wc; |
923de3cf | 700 | struct timespec boot; |
18068523 GOC |
701 | |
702 | if (!wall_clock) | |
703 | return; | |
704 | ||
705 | version++; | |
706 | ||
18068523 GOC |
707 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
708 | ||
50d0a0f9 GH |
709 | /* |
710 | * The guest calculates current wall clock time by adding | |
711 | * system time (updated by kvm_write_guest_time below) to the | |
712 | * wall clock specified here. guest system time equals host | |
713 | * system time for us, thus we must fill in host boot time here. | |
714 | */ | |
923de3cf | 715 | getboottime(&boot); |
50d0a0f9 GH |
716 | |
717 | wc.sec = boot.tv_sec; | |
718 | wc.nsec = boot.tv_nsec; | |
719 | wc.version = version; | |
18068523 GOC |
720 | |
721 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
722 | ||
723 | version++; | |
724 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
725 | } |
726 | ||
50d0a0f9 GH |
727 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
728 | { | |
729 | uint32_t quotient, remainder; | |
730 | ||
731 | /* Don't try to replace with do_div(), this one calculates | |
732 | * "(dividend << 32) / divisor" */ | |
733 | __asm__ ( "divl %4" | |
734 | : "=a" (quotient), "=d" (remainder) | |
735 | : "0" (0), "1" (dividend), "r" (divisor) ); | |
736 | return quotient; | |
737 | } | |
738 | ||
739 | static void kvm_set_time_scale(uint32_t tsc_khz, struct pvclock_vcpu_time_info *hv_clock) | |
740 | { | |
741 | uint64_t nsecs = 1000000000LL; | |
742 | int32_t shift = 0; | |
743 | uint64_t tps64; | |
744 | uint32_t tps32; | |
745 | ||
746 | tps64 = tsc_khz * 1000LL; | |
747 | while (tps64 > nsecs*2) { | |
748 | tps64 >>= 1; | |
749 | shift--; | |
750 | } | |
751 | ||
752 | tps32 = (uint32_t)tps64; | |
753 | while (tps32 <= (uint32_t)nsecs) { | |
754 | tps32 <<= 1; | |
755 | shift++; | |
756 | } | |
757 | ||
758 | hv_clock->tsc_shift = shift; | |
759 | hv_clock->tsc_to_system_mul = div_frac(nsecs, tps32); | |
760 | ||
761 | pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n", | |
80a914dc | 762 | __func__, tsc_khz, hv_clock->tsc_shift, |
50d0a0f9 GH |
763 | hv_clock->tsc_to_system_mul); |
764 | } | |
765 | ||
c8076604 GH |
766 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
767 | ||
18068523 GOC |
768 | static void kvm_write_guest_time(struct kvm_vcpu *v) |
769 | { | |
770 | struct timespec ts; | |
771 | unsigned long flags; | |
772 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
773 | void *shared_kaddr; | |
463656c0 | 774 | unsigned long this_tsc_khz; |
18068523 GOC |
775 | |
776 | if ((!vcpu->time_page)) | |
777 | return; | |
778 | ||
463656c0 AK |
779 | this_tsc_khz = get_cpu_var(cpu_tsc_khz); |
780 | if (unlikely(vcpu->hv_clock_tsc_khz != this_tsc_khz)) { | |
781 | kvm_set_time_scale(this_tsc_khz, &vcpu->hv_clock); | |
782 | vcpu->hv_clock_tsc_khz = this_tsc_khz; | |
50d0a0f9 | 783 | } |
463656c0 | 784 | put_cpu_var(cpu_tsc_khz); |
50d0a0f9 | 785 | |
18068523 GOC |
786 | /* Keep irq disabled to prevent changes to the clock */ |
787 | local_irq_save(flags); | |
af24a4e4 | 788 | kvm_get_msr(v, MSR_IA32_TSC, &vcpu->hv_clock.tsc_timestamp); |
18068523 | 789 | ktime_get_ts(&ts); |
923de3cf | 790 | monotonic_to_bootbased(&ts); |
18068523 GOC |
791 | local_irq_restore(flags); |
792 | ||
793 | /* With all the info we got, fill in the values */ | |
794 | ||
795 | vcpu->hv_clock.system_time = ts.tv_nsec + | |
afbcf7ab GC |
796 | (NSEC_PER_SEC * (u64)ts.tv_sec) + v->kvm->arch.kvmclock_offset; |
797 | ||
18068523 GOC |
798 | /* |
799 | * The interface expects us to write an even number signaling that the | |
800 | * update is finished. Since the guest won't see the intermediate | |
50d0a0f9 | 801 | * state, we just increase by 2 at the end. |
18068523 | 802 | */ |
50d0a0f9 | 803 | vcpu->hv_clock.version += 2; |
18068523 GOC |
804 | |
805 | shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0); | |
806 | ||
807 | memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock, | |
50d0a0f9 | 808 | sizeof(vcpu->hv_clock)); |
18068523 GOC |
809 | |
810 | kunmap_atomic(shared_kaddr, KM_USER0); | |
811 | ||
812 | mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); | |
813 | } | |
814 | ||
c8076604 GH |
815 | static int kvm_request_guest_time_update(struct kvm_vcpu *v) |
816 | { | |
817 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
818 | ||
819 | if (!vcpu->time_page) | |
820 | return 0; | |
821 | set_bit(KVM_REQ_KVMCLOCK_UPDATE, &v->requests); | |
822 | return 1; | |
823 | } | |
824 | ||
9ba075a6 AK |
825 | static bool msr_mtrr_valid(unsigned msr) |
826 | { | |
827 | switch (msr) { | |
828 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: | |
829 | case MSR_MTRRfix64K_00000: | |
830 | case MSR_MTRRfix16K_80000: | |
831 | case MSR_MTRRfix16K_A0000: | |
832 | case MSR_MTRRfix4K_C0000: | |
833 | case MSR_MTRRfix4K_C8000: | |
834 | case MSR_MTRRfix4K_D0000: | |
835 | case MSR_MTRRfix4K_D8000: | |
836 | case MSR_MTRRfix4K_E0000: | |
837 | case MSR_MTRRfix4K_E8000: | |
838 | case MSR_MTRRfix4K_F0000: | |
839 | case MSR_MTRRfix4K_F8000: | |
840 | case MSR_MTRRdefType: | |
841 | case MSR_IA32_CR_PAT: | |
842 | return true; | |
843 | case 0x2f8: | |
844 | return true; | |
845 | } | |
846 | return false; | |
847 | } | |
848 | ||
d6289b93 MT |
849 | static bool valid_pat_type(unsigned t) |
850 | { | |
851 | return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */ | |
852 | } | |
853 | ||
854 | static bool valid_mtrr_type(unsigned t) | |
855 | { | |
856 | return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ | |
857 | } | |
858 | ||
859 | static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
860 | { | |
861 | int i; | |
862 | ||
863 | if (!msr_mtrr_valid(msr)) | |
864 | return false; | |
865 | ||
866 | if (msr == MSR_IA32_CR_PAT) { | |
867 | for (i = 0; i < 8; i++) | |
868 | if (!valid_pat_type((data >> (i * 8)) & 0xff)) | |
869 | return false; | |
870 | return true; | |
871 | } else if (msr == MSR_MTRRdefType) { | |
872 | if (data & ~0xcff) | |
873 | return false; | |
874 | return valid_mtrr_type(data & 0xff); | |
875 | } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) { | |
876 | for (i = 0; i < 8 ; i++) | |
877 | if (!valid_mtrr_type((data >> (i * 8)) & 0xff)) | |
878 | return false; | |
879 | return true; | |
880 | } | |
881 | ||
882 | /* variable MTRRs */ | |
883 | return valid_mtrr_type(data & 0xff); | |
884 | } | |
885 | ||
9ba075a6 AK |
886 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
887 | { | |
0bed3b56 SY |
888 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
889 | ||
d6289b93 | 890 | if (!mtrr_valid(vcpu, msr, data)) |
9ba075a6 AK |
891 | return 1; |
892 | ||
0bed3b56 SY |
893 | if (msr == MSR_MTRRdefType) { |
894 | vcpu->arch.mtrr_state.def_type = data; | |
895 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; | |
896 | } else if (msr == MSR_MTRRfix64K_00000) | |
897 | p[0] = data; | |
898 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
899 | p[1 + msr - MSR_MTRRfix16K_80000] = data; | |
900 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
901 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; | |
902 | else if (msr == MSR_IA32_CR_PAT) | |
903 | vcpu->arch.pat = data; | |
904 | else { /* Variable MTRRs */ | |
905 | int idx, is_mtrr_mask; | |
906 | u64 *pt; | |
907 | ||
908 | idx = (msr - 0x200) / 2; | |
909 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
910 | if (!is_mtrr_mask) | |
911 | pt = | |
912 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
913 | else | |
914 | pt = | |
915 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
916 | *pt = data; | |
917 | } | |
918 | ||
919 | kvm_mmu_reset_context(vcpu); | |
9ba075a6 AK |
920 | return 0; |
921 | } | |
15c4a640 | 922 | |
890ca9ae | 923 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
15c4a640 | 924 | { |
890ca9ae HY |
925 | u64 mcg_cap = vcpu->arch.mcg_cap; |
926 | unsigned bank_num = mcg_cap & 0xff; | |
927 | ||
15c4a640 | 928 | switch (msr) { |
15c4a640 | 929 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 930 | vcpu->arch.mcg_status = data; |
15c4a640 | 931 | break; |
c7ac679c | 932 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
933 | if (!(mcg_cap & MCG_CTL_P)) |
934 | return 1; | |
935 | if (data != 0 && data != ~(u64)0) | |
936 | return -1; | |
937 | vcpu->arch.mcg_ctl = data; | |
938 | break; | |
939 | default: | |
940 | if (msr >= MSR_IA32_MC0_CTL && | |
941 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
942 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
114be429 AP |
943 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
944 | * some Linux kernels though clear bit 10 in bank 4 to | |
945 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore | |
946 | * this to avoid an uncatched #GP in the guest | |
947 | */ | |
890ca9ae | 948 | if ((offset & 0x3) == 0 && |
114be429 | 949 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
890ca9ae HY |
950 | return -1; |
951 | vcpu->arch.mce_banks[offset] = data; | |
952 | break; | |
953 | } | |
954 | return 1; | |
955 | } | |
956 | return 0; | |
957 | } | |
958 | ||
ffde22ac ES |
959 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
960 | { | |
961 | struct kvm *kvm = vcpu->kvm; | |
962 | int lm = is_long_mode(vcpu); | |
963 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
964 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
965 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
966 | : kvm->arch.xen_hvm_config.blob_size_32; | |
967 | u32 page_num = data & ~PAGE_MASK; | |
968 | u64 page_addr = data & PAGE_MASK; | |
969 | u8 *page; | |
970 | int r; | |
971 | ||
972 | r = -E2BIG; | |
973 | if (page_num >= blob_size) | |
974 | goto out; | |
975 | r = -ENOMEM; | |
976 | page = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
977 | if (!page) | |
978 | goto out; | |
979 | r = -EFAULT; | |
980 | if (copy_from_user(page, blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE)) | |
981 | goto out_free; | |
982 | if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE)) | |
983 | goto out_free; | |
984 | r = 0; | |
985 | out_free: | |
986 | kfree(page); | |
987 | out: | |
988 | return r; | |
989 | } | |
990 | ||
55cd8e5a GN |
991 | static bool kvm_hv_hypercall_enabled(struct kvm *kvm) |
992 | { | |
993 | return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE; | |
994 | } | |
995 | ||
996 | static bool kvm_hv_msr_partition_wide(u32 msr) | |
997 | { | |
998 | bool r = false; | |
999 | switch (msr) { | |
1000 | case HV_X64_MSR_GUEST_OS_ID: | |
1001 | case HV_X64_MSR_HYPERCALL: | |
1002 | r = true; | |
1003 | break; | |
1004 | } | |
1005 | ||
1006 | return r; | |
1007 | } | |
1008 | ||
1009 | static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1010 | { | |
1011 | struct kvm *kvm = vcpu->kvm; | |
1012 | ||
1013 | switch (msr) { | |
1014 | case HV_X64_MSR_GUEST_OS_ID: | |
1015 | kvm->arch.hv_guest_os_id = data; | |
1016 | /* setting guest os id to zero disables hypercall page */ | |
1017 | if (!kvm->arch.hv_guest_os_id) | |
1018 | kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE; | |
1019 | break; | |
1020 | case HV_X64_MSR_HYPERCALL: { | |
1021 | u64 gfn; | |
1022 | unsigned long addr; | |
1023 | u8 instructions[4]; | |
1024 | ||
1025 | /* if guest os id is not set hypercall should remain disabled */ | |
1026 | if (!kvm->arch.hv_guest_os_id) | |
1027 | break; | |
1028 | if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) { | |
1029 | kvm->arch.hv_hypercall = data; | |
1030 | break; | |
1031 | } | |
1032 | gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT; | |
1033 | addr = gfn_to_hva(kvm, gfn); | |
1034 | if (kvm_is_error_hva(addr)) | |
1035 | return 1; | |
1036 | kvm_x86_ops->patch_hypercall(vcpu, instructions); | |
1037 | ((unsigned char *)instructions)[3] = 0xc3; /* ret */ | |
1038 | if (copy_to_user((void __user *)addr, instructions, 4)) | |
1039 | return 1; | |
1040 | kvm->arch.hv_hypercall = data; | |
1041 | break; | |
1042 | } | |
1043 | default: | |
1044 | pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " | |
1045 | "data 0x%llx\n", msr, data); | |
1046 | return 1; | |
1047 | } | |
1048 | return 0; | |
1049 | } | |
1050 | ||
1051 | static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1052 | { | |
10388a07 GN |
1053 | switch (msr) { |
1054 | case HV_X64_MSR_APIC_ASSIST_PAGE: { | |
1055 | unsigned long addr; | |
55cd8e5a | 1056 | |
10388a07 GN |
1057 | if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) { |
1058 | vcpu->arch.hv_vapic = data; | |
1059 | break; | |
1060 | } | |
1061 | addr = gfn_to_hva(vcpu->kvm, data >> | |
1062 | HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT); | |
1063 | if (kvm_is_error_hva(addr)) | |
1064 | return 1; | |
1065 | if (clear_user((void __user *)addr, PAGE_SIZE)) | |
1066 | return 1; | |
1067 | vcpu->arch.hv_vapic = data; | |
1068 | break; | |
1069 | } | |
1070 | case HV_X64_MSR_EOI: | |
1071 | return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data); | |
1072 | case HV_X64_MSR_ICR: | |
1073 | return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data); | |
1074 | case HV_X64_MSR_TPR: | |
1075 | return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data); | |
1076 | default: | |
1077 | pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " | |
1078 | "data 0x%llx\n", msr, data); | |
1079 | return 1; | |
1080 | } | |
1081 | ||
1082 | return 0; | |
55cd8e5a GN |
1083 | } |
1084 | ||
15c4a640 CO |
1085 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1086 | { | |
1087 | switch (msr) { | |
15c4a640 CO |
1088 | case MSR_EFER: |
1089 | set_efer(vcpu, data); | |
1090 | break; | |
8f1589d9 AP |
1091 | case MSR_K7_HWCR: |
1092 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
1093 | if (data != 0) { | |
1094 | pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", | |
1095 | data); | |
1096 | return 1; | |
1097 | } | |
15c4a640 | 1098 | break; |
f7c6d140 AP |
1099 | case MSR_FAM10H_MMIO_CONF_BASE: |
1100 | if (data != 0) { | |
1101 | pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " | |
1102 | "0x%llx\n", data); | |
1103 | return 1; | |
1104 | } | |
15c4a640 | 1105 | break; |
c323c0e5 | 1106 | case MSR_AMD64_NB_CFG: |
c7ac679c | 1107 | break; |
b5e2fec0 AG |
1108 | case MSR_IA32_DEBUGCTLMSR: |
1109 | if (!data) { | |
1110 | /* We support the non-activated case already */ | |
1111 | break; | |
1112 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
1113 | /* Values other than LBR and BTF are vendor-specific, | |
1114 | thus reserved and should throw a #GP */ | |
1115 | return 1; | |
1116 | } | |
1117 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", | |
1118 | __func__, data); | |
1119 | break; | |
15c4a640 CO |
1120 | case MSR_IA32_UCODE_REV: |
1121 | case MSR_IA32_UCODE_WRITE: | |
61a6bd67 | 1122 | case MSR_VM_HSAVE_PA: |
6098ca93 | 1123 | case MSR_AMD64_PATCH_LOADER: |
15c4a640 | 1124 | break; |
9ba075a6 AK |
1125 | case 0x200 ... 0x2ff: |
1126 | return set_msr_mtrr(vcpu, msr, data); | |
15c4a640 CO |
1127 | case MSR_IA32_APICBASE: |
1128 | kvm_set_apic_base(vcpu, data); | |
1129 | break; | |
0105d1a5 GN |
1130 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1131 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
15c4a640 | 1132 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1133 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 1134 | break; |
18068523 GOC |
1135 | case MSR_KVM_WALL_CLOCK: |
1136 | vcpu->kvm->arch.wall_clock = data; | |
1137 | kvm_write_wall_clock(vcpu->kvm, data); | |
1138 | break; | |
1139 | case MSR_KVM_SYSTEM_TIME: { | |
1140 | if (vcpu->arch.time_page) { | |
1141 | kvm_release_page_dirty(vcpu->arch.time_page); | |
1142 | vcpu->arch.time_page = NULL; | |
1143 | } | |
1144 | ||
1145 | vcpu->arch.time = data; | |
1146 | ||
1147 | /* we verify if the enable bit is set... */ | |
1148 | if (!(data & 1)) | |
1149 | break; | |
1150 | ||
1151 | /* ...but clean it before doing the actual write */ | |
1152 | vcpu->arch.time_offset = data & ~(PAGE_MASK | 1); | |
1153 | ||
18068523 GOC |
1154 | vcpu->arch.time_page = |
1155 | gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT); | |
18068523 GOC |
1156 | |
1157 | if (is_error_page(vcpu->arch.time_page)) { | |
1158 | kvm_release_page_clean(vcpu->arch.time_page); | |
1159 | vcpu->arch.time_page = NULL; | |
1160 | } | |
1161 | ||
c8076604 | 1162 | kvm_request_guest_time_update(vcpu); |
18068523 GOC |
1163 | break; |
1164 | } | |
890ca9ae HY |
1165 | case MSR_IA32_MCG_CTL: |
1166 | case MSR_IA32_MCG_STATUS: | |
1167 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1168 | return set_msr_mce(vcpu, msr, data); | |
71db6023 AP |
1169 | |
1170 | /* Performance counters are not protected by a CPUID bit, | |
1171 | * so we should check all of them in the generic path for the sake of | |
1172 | * cross vendor migration. | |
1173 | * Writing a zero into the event select MSRs disables them, | |
1174 | * which we perfectly emulate ;-). Any other value should be at least | |
1175 | * reported, some guests depend on them. | |
1176 | */ | |
1177 | case MSR_P6_EVNTSEL0: | |
1178 | case MSR_P6_EVNTSEL1: | |
1179 | case MSR_K7_EVNTSEL0: | |
1180 | case MSR_K7_EVNTSEL1: | |
1181 | case MSR_K7_EVNTSEL2: | |
1182 | case MSR_K7_EVNTSEL3: | |
1183 | if (data != 0) | |
1184 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
1185 | "0x%x data 0x%llx\n", msr, data); | |
1186 | break; | |
1187 | /* at least RHEL 4 unconditionally writes to the perfctr registers, | |
1188 | * so we ignore writes to make it happy. | |
1189 | */ | |
1190 | case MSR_P6_PERFCTR0: | |
1191 | case MSR_P6_PERFCTR1: | |
1192 | case MSR_K7_PERFCTR0: | |
1193 | case MSR_K7_PERFCTR1: | |
1194 | case MSR_K7_PERFCTR2: | |
1195 | case MSR_K7_PERFCTR3: | |
1196 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
1197 | "0x%x data 0x%llx\n", msr, data); | |
1198 | break; | |
55cd8e5a GN |
1199 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
1200 | if (kvm_hv_msr_partition_wide(msr)) { | |
1201 | int r; | |
1202 | mutex_lock(&vcpu->kvm->lock); | |
1203 | r = set_msr_hyperv_pw(vcpu, msr, data); | |
1204 | mutex_unlock(&vcpu->kvm->lock); | |
1205 | return r; | |
1206 | } else | |
1207 | return set_msr_hyperv(vcpu, msr, data); | |
1208 | break; | |
15c4a640 | 1209 | default: |
ffde22ac ES |
1210 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
1211 | return xen_hvm_config(vcpu, data); | |
ed85c068 AP |
1212 | if (!ignore_msrs) { |
1213 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", | |
1214 | msr, data); | |
1215 | return 1; | |
1216 | } else { | |
1217 | pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", | |
1218 | msr, data); | |
1219 | break; | |
1220 | } | |
15c4a640 CO |
1221 | } |
1222 | return 0; | |
1223 | } | |
1224 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
1225 | ||
1226 | ||
1227 | /* | |
1228 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1229 | * Returns 0 on success, non-0 otherwise. | |
1230 | * Assumes vcpu_load() was already called. | |
1231 | */ | |
1232 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
1233 | { | |
1234 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); | |
1235 | } | |
1236 | ||
9ba075a6 AK |
1237 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1238 | { | |
0bed3b56 SY |
1239 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
1240 | ||
9ba075a6 AK |
1241 | if (!msr_mtrr_valid(msr)) |
1242 | return 1; | |
1243 | ||
0bed3b56 SY |
1244 | if (msr == MSR_MTRRdefType) |
1245 | *pdata = vcpu->arch.mtrr_state.def_type + | |
1246 | (vcpu->arch.mtrr_state.enabled << 10); | |
1247 | else if (msr == MSR_MTRRfix64K_00000) | |
1248 | *pdata = p[0]; | |
1249 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
1250 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; | |
1251 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
1252 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; | |
1253 | else if (msr == MSR_IA32_CR_PAT) | |
1254 | *pdata = vcpu->arch.pat; | |
1255 | else { /* Variable MTRRs */ | |
1256 | int idx, is_mtrr_mask; | |
1257 | u64 *pt; | |
1258 | ||
1259 | idx = (msr - 0x200) / 2; | |
1260 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
1261 | if (!is_mtrr_mask) | |
1262 | pt = | |
1263 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
1264 | else | |
1265 | pt = | |
1266 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
1267 | *pdata = *pt; | |
1268 | } | |
1269 | ||
9ba075a6 AK |
1270 | return 0; |
1271 | } | |
1272 | ||
890ca9ae | 1273 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
1274 | { |
1275 | u64 data; | |
890ca9ae HY |
1276 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1277 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
1278 | |
1279 | switch (msr) { | |
15c4a640 CO |
1280 | case MSR_IA32_P5_MC_ADDR: |
1281 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
1282 | data = 0; |
1283 | break; | |
15c4a640 | 1284 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
1285 | data = vcpu->arch.mcg_cap; |
1286 | break; | |
c7ac679c | 1287 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1288 | if (!(mcg_cap & MCG_CTL_P)) |
1289 | return 1; | |
1290 | data = vcpu->arch.mcg_ctl; | |
1291 | break; | |
1292 | case MSR_IA32_MCG_STATUS: | |
1293 | data = vcpu->arch.mcg_status; | |
1294 | break; | |
1295 | default: | |
1296 | if (msr >= MSR_IA32_MC0_CTL && | |
1297 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1298 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
1299 | data = vcpu->arch.mce_banks[offset]; | |
1300 | break; | |
1301 | } | |
1302 | return 1; | |
1303 | } | |
1304 | *pdata = data; | |
1305 | return 0; | |
1306 | } | |
1307 | ||
55cd8e5a GN |
1308 | static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1309 | { | |
1310 | u64 data = 0; | |
1311 | struct kvm *kvm = vcpu->kvm; | |
1312 | ||
1313 | switch (msr) { | |
1314 | case HV_X64_MSR_GUEST_OS_ID: | |
1315 | data = kvm->arch.hv_guest_os_id; | |
1316 | break; | |
1317 | case HV_X64_MSR_HYPERCALL: | |
1318 | data = kvm->arch.hv_hypercall; | |
1319 | break; | |
1320 | default: | |
1321 | pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); | |
1322 | return 1; | |
1323 | } | |
1324 | ||
1325 | *pdata = data; | |
1326 | return 0; | |
1327 | } | |
1328 | ||
1329 | static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) | |
1330 | { | |
1331 | u64 data = 0; | |
1332 | ||
1333 | switch (msr) { | |
1334 | case HV_X64_MSR_VP_INDEX: { | |
1335 | int r; | |
1336 | struct kvm_vcpu *v; | |
1337 | kvm_for_each_vcpu(r, v, vcpu->kvm) | |
1338 | if (v == vcpu) | |
1339 | data = r; | |
1340 | break; | |
1341 | } | |
10388a07 GN |
1342 | case HV_X64_MSR_EOI: |
1343 | return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata); | |
1344 | case HV_X64_MSR_ICR: | |
1345 | return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata); | |
1346 | case HV_X64_MSR_TPR: | |
1347 | return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata); | |
55cd8e5a GN |
1348 | default: |
1349 | pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); | |
1350 | return 1; | |
1351 | } | |
1352 | *pdata = data; | |
1353 | return 0; | |
1354 | } | |
1355 | ||
890ca9ae HY |
1356 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1357 | { | |
1358 | u64 data; | |
1359 | ||
1360 | switch (msr) { | |
890ca9ae | 1361 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 1362 | case MSR_IA32_UCODE_REV: |
15c4a640 | 1363 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
1364 | case MSR_IA32_DEBUGCTLMSR: |
1365 | case MSR_IA32_LASTBRANCHFROMIP: | |
1366 | case MSR_IA32_LASTBRANCHTOIP: | |
1367 | case MSR_IA32_LASTINTFROMIP: | |
1368 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd JSR |
1369 | case MSR_K8_SYSCFG: |
1370 | case MSR_K7_HWCR: | |
61a6bd67 | 1371 | case MSR_VM_HSAVE_PA: |
1f3ee616 AS |
1372 | case MSR_P6_PERFCTR0: |
1373 | case MSR_P6_PERFCTR1: | |
7fe29e0f AS |
1374 | case MSR_P6_EVNTSEL0: |
1375 | case MSR_P6_EVNTSEL1: | |
9e699624 | 1376 | case MSR_K7_EVNTSEL0: |
1f3ee616 | 1377 | case MSR_K7_PERFCTR0: |
1fdbd48c | 1378 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 1379 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 1380 | case MSR_FAM10H_MMIO_CONF_BASE: |
15c4a640 CO |
1381 | data = 0; |
1382 | break; | |
9ba075a6 AK |
1383 | case MSR_MTRRcap: |
1384 | data = 0x500 | KVM_NR_VAR_MTRR; | |
1385 | break; | |
1386 | case 0x200 ... 0x2ff: | |
1387 | return get_msr_mtrr(vcpu, msr, pdata); | |
15c4a640 CO |
1388 | case 0xcd: /* fsb frequency */ |
1389 | data = 3; | |
1390 | break; | |
1391 | case MSR_IA32_APICBASE: | |
1392 | data = kvm_get_apic_base(vcpu); | |
1393 | break; | |
0105d1a5 GN |
1394 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1395 | return kvm_x2apic_msr_read(vcpu, msr, pdata); | |
1396 | break; | |
15c4a640 | 1397 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1398 | data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 1399 | break; |
847f0ad8 AG |
1400 | case MSR_IA32_PERF_STATUS: |
1401 | /* TSC increment by tick */ | |
1402 | data = 1000ULL; | |
1403 | /* CPU multiplier */ | |
1404 | data |= (((uint64_t)4ULL) << 40); | |
1405 | break; | |
15c4a640 | 1406 | case MSR_EFER: |
f6801dff | 1407 | data = vcpu->arch.efer; |
15c4a640 | 1408 | break; |
18068523 GOC |
1409 | case MSR_KVM_WALL_CLOCK: |
1410 | data = vcpu->kvm->arch.wall_clock; | |
1411 | break; | |
1412 | case MSR_KVM_SYSTEM_TIME: | |
1413 | data = vcpu->arch.time; | |
1414 | break; | |
890ca9ae HY |
1415 | case MSR_IA32_P5_MC_ADDR: |
1416 | case MSR_IA32_P5_MC_TYPE: | |
1417 | case MSR_IA32_MCG_CAP: | |
1418 | case MSR_IA32_MCG_CTL: | |
1419 | case MSR_IA32_MCG_STATUS: | |
1420 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1421 | return get_msr_mce(vcpu, msr, pdata); | |
55cd8e5a GN |
1422 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
1423 | if (kvm_hv_msr_partition_wide(msr)) { | |
1424 | int r; | |
1425 | mutex_lock(&vcpu->kvm->lock); | |
1426 | r = get_msr_hyperv_pw(vcpu, msr, pdata); | |
1427 | mutex_unlock(&vcpu->kvm->lock); | |
1428 | return r; | |
1429 | } else | |
1430 | return get_msr_hyperv(vcpu, msr, pdata); | |
1431 | break; | |
15c4a640 | 1432 | default: |
ed85c068 AP |
1433 | if (!ignore_msrs) { |
1434 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); | |
1435 | return 1; | |
1436 | } else { | |
1437 | pr_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr); | |
1438 | data = 0; | |
1439 | } | |
1440 | break; | |
15c4a640 CO |
1441 | } |
1442 | *pdata = data; | |
1443 | return 0; | |
1444 | } | |
1445 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1446 | ||
313a3dc7 CO |
1447 | /* |
1448 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
1449 | * | |
1450 | * @return number of msrs set successfully. | |
1451 | */ | |
1452 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
1453 | struct kvm_msr_entry *entries, | |
1454 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1455 | unsigned index, u64 *data)) | |
1456 | { | |
f656ce01 | 1457 | int i, idx; |
313a3dc7 CO |
1458 | |
1459 | vcpu_load(vcpu); | |
1460 | ||
f656ce01 | 1461 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
313a3dc7 CO |
1462 | for (i = 0; i < msrs->nmsrs; ++i) |
1463 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
1464 | break; | |
f656ce01 | 1465 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 CO |
1466 | |
1467 | vcpu_put(vcpu); | |
1468 | ||
1469 | return i; | |
1470 | } | |
1471 | ||
1472 | /* | |
1473 | * Read or write a bunch of msrs. Parameters are user addresses. | |
1474 | * | |
1475 | * @return number of msrs set successfully. | |
1476 | */ | |
1477 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
1478 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1479 | unsigned index, u64 *data), | |
1480 | int writeback) | |
1481 | { | |
1482 | struct kvm_msrs msrs; | |
1483 | struct kvm_msr_entry *entries; | |
1484 | int r, n; | |
1485 | unsigned size; | |
1486 | ||
1487 | r = -EFAULT; | |
1488 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
1489 | goto out; | |
1490 | ||
1491 | r = -E2BIG; | |
1492 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
1493 | goto out; | |
1494 | ||
1495 | r = -ENOMEM; | |
1496 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
1497 | entries = vmalloc(size); | |
1498 | if (!entries) | |
1499 | goto out; | |
1500 | ||
1501 | r = -EFAULT; | |
1502 | if (copy_from_user(entries, user_msrs->entries, size)) | |
1503 | goto out_free; | |
1504 | ||
1505 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
1506 | if (r < 0) | |
1507 | goto out_free; | |
1508 | ||
1509 | r = -EFAULT; | |
1510 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
1511 | goto out_free; | |
1512 | ||
1513 | r = n; | |
1514 | ||
1515 | out_free: | |
1516 | vfree(entries); | |
1517 | out: | |
1518 | return r; | |
1519 | } | |
1520 | ||
018d00d2 ZX |
1521 | int kvm_dev_ioctl_check_extension(long ext) |
1522 | { | |
1523 | int r; | |
1524 | ||
1525 | switch (ext) { | |
1526 | case KVM_CAP_IRQCHIP: | |
1527 | case KVM_CAP_HLT: | |
1528 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 1529 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 1530 | case KVM_CAP_EXT_CPUID: |
c8076604 | 1531 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 1532 | case KVM_CAP_PIT: |
a28e4f5a | 1533 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 1534 | case KVM_CAP_MP_STATE: |
ed848624 | 1535 | case KVM_CAP_SYNC_MMU: |
52d939a0 | 1536 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 1537 | case KVM_CAP_IRQ_INJECT_STATUS: |
e56d532f | 1538 | case KVM_CAP_ASSIGN_DEV_IRQ: |
721eecbf | 1539 | case KVM_CAP_IRQFD: |
d34e6b17 | 1540 | case KVM_CAP_IOEVENTFD: |
c5ff41ce | 1541 | case KVM_CAP_PIT2: |
e9f42757 | 1542 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 1543 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 1544 | case KVM_CAP_XEN_HVM: |
afbcf7ab | 1545 | case KVM_CAP_ADJUST_CLOCK: |
3cfc3092 | 1546 | case KVM_CAP_VCPU_EVENTS: |
55cd8e5a | 1547 | case KVM_CAP_HYPERV: |
10388a07 | 1548 | case KVM_CAP_HYPERV_VAPIC: |
c25bc163 | 1549 | case KVM_CAP_HYPERV_SPIN: |
ab9f4ecb | 1550 | case KVM_CAP_PCI_SEGMENT: |
d2be1651 | 1551 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
018d00d2 ZX |
1552 | r = 1; |
1553 | break; | |
542472b5 LV |
1554 | case KVM_CAP_COALESCED_MMIO: |
1555 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
1556 | break; | |
774ead3a AK |
1557 | case KVM_CAP_VAPIC: |
1558 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
1559 | break; | |
f725230a AK |
1560 | case KVM_CAP_NR_VCPUS: |
1561 | r = KVM_MAX_VCPUS; | |
1562 | break; | |
a988b910 AK |
1563 | case KVM_CAP_NR_MEMSLOTS: |
1564 | r = KVM_MEMORY_SLOTS; | |
1565 | break; | |
a68a6a72 MT |
1566 | case KVM_CAP_PV_MMU: /* obsolete */ |
1567 | r = 0; | |
2f333bcb | 1568 | break; |
62c476c7 | 1569 | case KVM_CAP_IOMMU: |
19de40a8 | 1570 | r = iommu_found(); |
62c476c7 | 1571 | break; |
890ca9ae HY |
1572 | case KVM_CAP_MCE: |
1573 | r = KVM_MAX_MCE_BANKS; | |
1574 | break; | |
018d00d2 ZX |
1575 | default: |
1576 | r = 0; | |
1577 | break; | |
1578 | } | |
1579 | return r; | |
1580 | ||
1581 | } | |
1582 | ||
043405e1 CO |
1583 | long kvm_arch_dev_ioctl(struct file *filp, |
1584 | unsigned int ioctl, unsigned long arg) | |
1585 | { | |
1586 | void __user *argp = (void __user *)arg; | |
1587 | long r; | |
1588 | ||
1589 | switch (ioctl) { | |
1590 | case KVM_GET_MSR_INDEX_LIST: { | |
1591 | struct kvm_msr_list __user *user_msr_list = argp; | |
1592 | struct kvm_msr_list msr_list; | |
1593 | unsigned n; | |
1594 | ||
1595 | r = -EFAULT; | |
1596 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
1597 | goto out; | |
1598 | n = msr_list.nmsrs; | |
1599 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); | |
1600 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) | |
1601 | goto out; | |
1602 | r = -E2BIG; | |
e125e7b6 | 1603 | if (n < msr_list.nmsrs) |
043405e1 CO |
1604 | goto out; |
1605 | r = -EFAULT; | |
1606 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
1607 | num_msrs_to_save * sizeof(u32))) | |
1608 | goto out; | |
e125e7b6 | 1609 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 CO |
1610 | &emulated_msrs, |
1611 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
1612 | goto out; | |
1613 | r = 0; | |
1614 | break; | |
1615 | } | |
674eea0f AK |
1616 | case KVM_GET_SUPPORTED_CPUID: { |
1617 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1618 | struct kvm_cpuid2 cpuid; | |
1619 | ||
1620 | r = -EFAULT; | |
1621 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1622 | goto out; | |
1623 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, | |
19355475 | 1624 | cpuid_arg->entries); |
674eea0f AK |
1625 | if (r) |
1626 | goto out; | |
1627 | ||
1628 | r = -EFAULT; | |
1629 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
1630 | goto out; | |
1631 | r = 0; | |
1632 | break; | |
1633 | } | |
890ca9ae HY |
1634 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
1635 | u64 mce_cap; | |
1636 | ||
1637 | mce_cap = KVM_MCE_CAP_SUPPORTED; | |
1638 | r = -EFAULT; | |
1639 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) | |
1640 | goto out; | |
1641 | r = 0; | |
1642 | break; | |
1643 | } | |
043405e1 CO |
1644 | default: |
1645 | r = -EINVAL; | |
1646 | } | |
1647 | out: | |
1648 | return r; | |
1649 | } | |
1650 | ||
313a3dc7 CO |
1651 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1652 | { | |
1653 | kvm_x86_ops->vcpu_load(vcpu, cpu); | |
6b7d7e76 ZA |
1654 | if (unlikely(per_cpu(cpu_tsc_khz, cpu) == 0)) { |
1655 | unsigned long khz = cpufreq_quick_get(cpu); | |
1656 | if (!khz) | |
1657 | khz = tsc_khz; | |
1658 | per_cpu(cpu_tsc_khz, cpu) = khz; | |
1659 | } | |
c8076604 | 1660 | kvm_request_guest_time_update(vcpu); |
313a3dc7 CO |
1661 | } |
1662 | ||
1663 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1664 | { | |
9327fd11 | 1665 | kvm_put_guest_fpu(vcpu); |
02daab21 | 1666 | kvm_x86_ops->vcpu_put(vcpu); |
313a3dc7 CO |
1667 | } |
1668 | ||
07716717 | 1669 | static int is_efer_nx(void) |
313a3dc7 | 1670 | { |
e286e86e | 1671 | unsigned long long efer = 0; |
313a3dc7 | 1672 | |
e286e86e | 1673 | rdmsrl_safe(MSR_EFER, &efer); |
07716717 DK |
1674 | return efer & EFER_NX; |
1675 | } | |
1676 | ||
1677 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) | |
1678 | { | |
1679 | int i; | |
1680 | struct kvm_cpuid_entry2 *e, *entry; | |
1681 | ||
313a3dc7 | 1682 | entry = NULL; |
ad312c7c ZX |
1683 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
1684 | e = &vcpu->arch.cpuid_entries[i]; | |
313a3dc7 CO |
1685 | if (e->function == 0x80000001) { |
1686 | entry = e; | |
1687 | break; | |
1688 | } | |
1689 | } | |
07716717 | 1690 | if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { |
313a3dc7 CO |
1691 | entry->edx &= ~(1 << 20); |
1692 | printk(KERN_INFO "kvm: guest NX capability removed\n"); | |
1693 | } | |
1694 | } | |
1695 | ||
07716717 | 1696 | /* when an old userspace process fills a new kernel module */ |
313a3dc7 CO |
1697 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
1698 | struct kvm_cpuid *cpuid, | |
1699 | struct kvm_cpuid_entry __user *entries) | |
07716717 DK |
1700 | { |
1701 | int r, i; | |
1702 | struct kvm_cpuid_entry *cpuid_entries; | |
1703 | ||
1704 | r = -E2BIG; | |
1705 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1706 | goto out; | |
1707 | r = -ENOMEM; | |
1708 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); | |
1709 | if (!cpuid_entries) | |
1710 | goto out; | |
1711 | r = -EFAULT; | |
1712 | if (copy_from_user(cpuid_entries, entries, | |
1713 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
1714 | goto out_free; | |
1715 | for (i = 0; i < cpuid->nent; i++) { | |
ad312c7c ZX |
1716 | vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; |
1717 | vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; | |
1718 | vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; | |
1719 | vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; | |
1720 | vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; | |
1721 | vcpu->arch.cpuid_entries[i].index = 0; | |
1722 | vcpu->arch.cpuid_entries[i].flags = 0; | |
1723 | vcpu->arch.cpuid_entries[i].padding[0] = 0; | |
1724 | vcpu->arch.cpuid_entries[i].padding[1] = 0; | |
1725 | vcpu->arch.cpuid_entries[i].padding[2] = 0; | |
1726 | } | |
1727 | vcpu->arch.cpuid_nent = cpuid->nent; | |
07716717 DK |
1728 | cpuid_fix_nx_cap(vcpu); |
1729 | r = 0; | |
fc61b800 | 1730 | kvm_apic_set_version(vcpu); |
0e851880 | 1731 | kvm_x86_ops->cpuid_update(vcpu); |
07716717 DK |
1732 | |
1733 | out_free: | |
1734 | vfree(cpuid_entries); | |
1735 | out: | |
1736 | return r; | |
1737 | } | |
1738 | ||
1739 | static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, | |
19355475 AS |
1740 | struct kvm_cpuid2 *cpuid, |
1741 | struct kvm_cpuid_entry2 __user *entries) | |
313a3dc7 CO |
1742 | { |
1743 | int r; | |
1744 | ||
1745 | r = -E2BIG; | |
1746 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1747 | goto out; | |
1748 | r = -EFAULT; | |
ad312c7c | 1749 | if (copy_from_user(&vcpu->arch.cpuid_entries, entries, |
07716717 | 1750 | cpuid->nent * sizeof(struct kvm_cpuid_entry2))) |
313a3dc7 | 1751 | goto out; |
ad312c7c | 1752 | vcpu->arch.cpuid_nent = cpuid->nent; |
fc61b800 | 1753 | kvm_apic_set_version(vcpu); |
0e851880 | 1754 | kvm_x86_ops->cpuid_update(vcpu); |
313a3dc7 CO |
1755 | return 0; |
1756 | ||
1757 | out: | |
1758 | return r; | |
1759 | } | |
1760 | ||
07716717 | 1761 | static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, |
19355475 AS |
1762 | struct kvm_cpuid2 *cpuid, |
1763 | struct kvm_cpuid_entry2 __user *entries) | |
07716717 DK |
1764 | { |
1765 | int r; | |
1766 | ||
1767 | r = -E2BIG; | |
ad312c7c | 1768 | if (cpuid->nent < vcpu->arch.cpuid_nent) |
07716717 DK |
1769 | goto out; |
1770 | r = -EFAULT; | |
ad312c7c | 1771 | if (copy_to_user(entries, &vcpu->arch.cpuid_entries, |
19355475 | 1772 | vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
1773 | goto out; |
1774 | return 0; | |
1775 | ||
1776 | out: | |
ad312c7c | 1777 | cpuid->nent = vcpu->arch.cpuid_nent; |
07716717 DK |
1778 | return r; |
1779 | } | |
1780 | ||
07716717 | 1781 | static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
19355475 | 1782 | u32 index) |
07716717 DK |
1783 | { |
1784 | entry->function = function; | |
1785 | entry->index = index; | |
1786 | cpuid_count(entry->function, entry->index, | |
19355475 | 1787 | &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); |
07716717 DK |
1788 | entry->flags = 0; |
1789 | } | |
1790 | ||
7faa4ee1 AK |
1791 | #define F(x) bit(X86_FEATURE_##x) |
1792 | ||
07716717 DK |
1793 | static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
1794 | u32 index, int *nent, int maxnent) | |
1795 | { | |
7faa4ee1 | 1796 | unsigned f_nx = is_efer_nx() ? F(NX) : 0; |
07716717 | 1797 | #ifdef CONFIG_X86_64 |
17cc3935 SY |
1798 | unsigned f_gbpages = (kvm_x86_ops->get_lpage_level() == PT_PDPE_LEVEL) |
1799 | ? F(GBPAGES) : 0; | |
7faa4ee1 AK |
1800 | unsigned f_lm = F(LM); |
1801 | #else | |
17cc3935 | 1802 | unsigned f_gbpages = 0; |
7faa4ee1 | 1803 | unsigned f_lm = 0; |
07716717 | 1804 | #endif |
4e47c7a6 | 1805 | unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0; |
7faa4ee1 AK |
1806 | |
1807 | /* cpuid 1.edx */ | |
1808 | const u32 kvm_supported_word0_x86_features = | |
1809 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
1810 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
1811 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) | | |
1812 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
1813 | F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) | | |
1814 | 0 /* Reserved, DS, ACPI */ | F(MMX) | | |
1815 | F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) | | |
1816 | 0 /* HTT, TM, Reserved, PBE */; | |
1817 | /* cpuid 0x80000001.edx */ | |
1818 | const u32 kvm_supported_word1_x86_features = | |
1819 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
1820 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
1821 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) | | |
1822 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
1823 | F(PAT) | F(PSE36) | 0 /* Reserved */ | | |
1824 | f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) | | |
4e47c7a6 | 1825 | F(FXSR) | F(FXSR_OPT) | f_gbpages | f_rdtscp | |
7faa4ee1 AK |
1826 | 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW); |
1827 | /* cpuid 1.ecx */ | |
1828 | const u32 kvm_supported_word4_x86_features = | |
d149c731 AK |
1829 | F(XMM3) | 0 /* Reserved, DTES64, MONITOR */ | |
1830 | 0 /* DS-CPL, VMX, SMX, EST */ | | |
1831 | 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ | | |
1832 | 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ | | |
1833 | 0 /* Reserved, DCA */ | F(XMM4_1) | | |
0105d1a5 | 1834 | F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) | |
d149c731 | 1835 | 0 /* Reserved, XSAVE, OSXSAVE */; |
7faa4ee1 | 1836 | /* cpuid 0x80000001.ecx */ |
07716717 | 1837 | const u32 kvm_supported_word6_x86_features = |
7faa4ee1 AK |
1838 | F(LAHF_LM) | F(CMP_LEGACY) | F(SVM) | 0 /* ExtApicSpace */ | |
1839 | F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) | | |
1840 | F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(SSE5) | | |
1841 | 0 /* SKINIT */ | 0 /* WDT */; | |
07716717 | 1842 | |
19355475 | 1843 | /* all calls to cpuid_count() should be made on the same cpu */ |
07716717 DK |
1844 | get_cpu(); |
1845 | do_cpuid_1_ent(entry, function, index); | |
1846 | ++*nent; | |
1847 | ||
1848 | switch (function) { | |
1849 | case 0: | |
1850 | entry->eax = min(entry->eax, (u32)0xb); | |
1851 | break; | |
1852 | case 1: | |
1853 | entry->edx &= kvm_supported_word0_x86_features; | |
7faa4ee1 | 1854 | entry->ecx &= kvm_supported_word4_x86_features; |
0d1de2d9 GN |
1855 | /* we support x2apic emulation even if host does not support |
1856 | * it since we emulate x2apic in software */ | |
1857 | entry->ecx |= F(X2APIC); | |
07716717 DK |
1858 | break; |
1859 | /* function 2 entries are STATEFUL. That is, repeated cpuid commands | |
1860 | * may return different values. This forces us to get_cpu() before | |
1861 | * issuing the first command, and also to emulate this annoying behavior | |
1862 | * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ | |
1863 | case 2: { | |
1864 | int t, times = entry->eax & 0xff; | |
1865 | ||
1866 | entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
0fdf8e59 | 1867 | entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; |
07716717 DK |
1868 | for (t = 1; t < times && *nent < maxnent; ++t) { |
1869 | do_cpuid_1_ent(&entry[t], function, 0); | |
1870 | entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
1871 | ++*nent; | |
1872 | } | |
1873 | break; | |
1874 | } | |
1875 | /* function 4 and 0xb have additional index. */ | |
1876 | case 4: { | |
14af3f3c | 1877 | int i, cache_type; |
07716717 DK |
1878 | |
1879 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1880 | /* read more entries until cache_type is zero */ | |
14af3f3c HH |
1881 | for (i = 1; *nent < maxnent; ++i) { |
1882 | cache_type = entry[i - 1].eax & 0x1f; | |
07716717 DK |
1883 | if (!cache_type) |
1884 | break; | |
14af3f3c HH |
1885 | do_cpuid_1_ent(&entry[i], function, i); |
1886 | entry[i].flags |= | |
07716717 DK |
1887 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1888 | ++*nent; | |
1889 | } | |
1890 | break; | |
1891 | } | |
1892 | case 0xb: { | |
14af3f3c | 1893 | int i, level_type; |
07716717 DK |
1894 | |
1895 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1896 | /* read more entries until level_type is zero */ | |
14af3f3c | 1897 | for (i = 1; *nent < maxnent; ++i) { |
0853d2c1 | 1898 | level_type = entry[i - 1].ecx & 0xff00; |
07716717 DK |
1899 | if (!level_type) |
1900 | break; | |
14af3f3c HH |
1901 | do_cpuid_1_ent(&entry[i], function, i); |
1902 | entry[i].flags |= | |
07716717 DK |
1903 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1904 | ++*nent; | |
1905 | } | |
1906 | break; | |
1907 | } | |
1908 | case 0x80000000: | |
1909 | entry->eax = min(entry->eax, 0x8000001a); | |
1910 | break; | |
1911 | case 0x80000001: | |
1912 | entry->edx &= kvm_supported_word1_x86_features; | |
1913 | entry->ecx &= kvm_supported_word6_x86_features; | |
1914 | break; | |
1915 | } | |
1916 | put_cpu(); | |
1917 | } | |
1918 | ||
7faa4ee1 AK |
1919 | #undef F |
1920 | ||
674eea0f | 1921 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
19355475 | 1922 | struct kvm_cpuid_entry2 __user *entries) |
07716717 DK |
1923 | { |
1924 | struct kvm_cpuid_entry2 *cpuid_entries; | |
1925 | int limit, nent = 0, r = -E2BIG; | |
1926 | u32 func; | |
1927 | ||
1928 | if (cpuid->nent < 1) | |
1929 | goto out; | |
6a544355 AK |
1930 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) |
1931 | cpuid->nent = KVM_MAX_CPUID_ENTRIES; | |
07716717 DK |
1932 | r = -ENOMEM; |
1933 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); | |
1934 | if (!cpuid_entries) | |
1935 | goto out; | |
1936 | ||
1937 | do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); | |
1938 | limit = cpuid_entries[0].eax; | |
1939 | for (func = 1; func <= limit && nent < cpuid->nent; ++func) | |
1940 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 1941 | &nent, cpuid->nent); |
07716717 DK |
1942 | r = -E2BIG; |
1943 | if (nent >= cpuid->nent) | |
1944 | goto out_free; | |
1945 | ||
1946 | do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); | |
1947 | limit = cpuid_entries[nent - 1].eax; | |
1948 | for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) | |
1949 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 1950 | &nent, cpuid->nent); |
cb007648 MM |
1951 | r = -E2BIG; |
1952 | if (nent >= cpuid->nent) | |
1953 | goto out_free; | |
1954 | ||
07716717 DK |
1955 | r = -EFAULT; |
1956 | if (copy_to_user(entries, cpuid_entries, | |
19355475 | 1957 | nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
1958 | goto out_free; |
1959 | cpuid->nent = nent; | |
1960 | r = 0; | |
1961 | ||
1962 | out_free: | |
1963 | vfree(cpuid_entries); | |
1964 | out: | |
1965 | return r; | |
1966 | } | |
1967 | ||
313a3dc7 CO |
1968 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
1969 | struct kvm_lapic_state *s) | |
1970 | { | |
1971 | vcpu_load(vcpu); | |
ad312c7c | 1972 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
1973 | vcpu_put(vcpu); |
1974 | ||
1975 | return 0; | |
1976 | } | |
1977 | ||
1978 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
1979 | struct kvm_lapic_state *s) | |
1980 | { | |
1981 | vcpu_load(vcpu); | |
ad312c7c | 1982 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
313a3dc7 | 1983 | kvm_apic_post_state_restore(vcpu); |
cb142eb7 | 1984 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
1985 | vcpu_put(vcpu); |
1986 | ||
1987 | return 0; | |
1988 | } | |
1989 | ||
f77bc6a4 ZX |
1990 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
1991 | struct kvm_interrupt *irq) | |
1992 | { | |
1993 | if (irq->irq < 0 || irq->irq >= 256) | |
1994 | return -EINVAL; | |
1995 | if (irqchip_in_kernel(vcpu->kvm)) | |
1996 | return -ENXIO; | |
1997 | vcpu_load(vcpu); | |
1998 | ||
66fd3f7f | 1999 | kvm_queue_interrupt(vcpu, irq->irq, false); |
f77bc6a4 ZX |
2000 | |
2001 | vcpu_put(vcpu); | |
2002 | ||
2003 | return 0; | |
2004 | } | |
2005 | ||
c4abb7c9 JK |
2006 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
2007 | { | |
2008 | vcpu_load(vcpu); | |
2009 | kvm_inject_nmi(vcpu); | |
2010 | vcpu_put(vcpu); | |
2011 | ||
2012 | return 0; | |
2013 | } | |
2014 | ||
b209749f AK |
2015 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
2016 | struct kvm_tpr_access_ctl *tac) | |
2017 | { | |
2018 | if (tac->flags) | |
2019 | return -EINVAL; | |
2020 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
2021 | return 0; | |
2022 | } | |
2023 | ||
890ca9ae HY |
2024 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
2025 | u64 mcg_cap) | |
2026 | { | |
2027 | int r; | |
2028 | unsigned bank_num = mcg_cap & 0xff, bank; | |
2029 | ||
2030 | r = -EINVAL; | |
a9e38c3e | 2031 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae HY |
2032 | goto out; |
2033 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) | |
2034 | goto out; | |
2035 | r = 0; | |
2036 | vcpu->arch.mcg_cap = mcg_cap; | |
2037 | /* Init IA32_MCG_CTL to all 1s */ | |
2038 | if (mcg_cap & MCG_CTL_P) | |
2039 | vcpu->arch.mcg_ctl = ~(u64)0; | |
2040 | /* Init IA32_MCi_CTL to all 1s */ | |
2041 | for (bank = 0; bank < bank_num; bank++) | |
2042 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
2043 | out: | |
2044 | return r; | |
2045 | } | |
2046 | ||
2047 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
2048 | struct kvm_x86_mce *mce) | |
2049 | { | |
2050 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
2051 | unsigned bank_num = mcg_cap & 0xff; | |
2052 | u64 *banks = vcpu->arch.mce_banks; | |
2053 | ||
2054 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
2055 | return -EINVAL; | |
2056 | /* | |
2057 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
2058 | * reporting is disabled | |
2059 | */ | |
2060 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
2061 | vcpu->arch.mcg_ctl != ~(u64)0) | |
2062 | return 0; | |
2063 | banks += 4 * mce->bank; | |
2064 | /* | |
2065 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
2066 | * reporting is disabled for the bank | |
2067 | */ | |
2068 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
2069 | return 0; | |
2070 | if (mce->status & MCI_STATUS_UC) { | |
2071 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 2072 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
890ca9ae HY |
2073 | printk(KERN_DEBUG "kvm: set_mce: " |
2074 | "injects mce exception while " | |
2075 | "previous one is in progress!\n"); | |
2076 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); | |
2077 | return 0; | |
2078 | } | |
2079 | if (banks[1] & MCI_STATUS_VAL) | |
2080 | mce->status |= MCI_STATUS_OVER; | |
2081 | banks[2] = mce->addr; | |
2082 | banks[3] = mce->misc; | |
2083 | vcpu->arch.mcg_status = mce->mcg_status; | |
2084 | banks[1] = mce->status; | |
2085 | kvm_queue_exception(vcpu, MC_VECTOR); | |
2086 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
2087 | || !(banks[1] & MCI_STATUS_UC)) { | |
2088 | if (banks[1] & MCI_STATUS_VAL) | |
2089 | mce->status |= MCI_STATUS_OVER; | |
2090 | banks[2] = mce->addr; | |
2091 | banks[3] = mce->misc; | |
2092 | banks[1] = mce->status; | |
2093 | } else | |
2094 | banks[1] |= MCI_STATUS_OVER; | |
2095 | return 0; | |
2096 | } | |
2097 | ||
3cfc3092 JK |
2098 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
2099 | struct kvm_vcpu_events *events) | |
2100 | { | |
2101 | vcpu_load(vcpu); | |
2102 | ||
2103 | events->exception.injected = vcpu->arch.exception.pending; | |
2104 | events->exception.nr = vcpu->arch.exception.nr; | |
2105 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
2106 | events->exception.error_code = vcpu->arch.exception.error_code; | |
2107 | ||
2108 | events->interrupt.injected = vcpu->arch.interrupt.pending; | |
2109 | events->interrupt.nr = vcpu->arch.interrupt.nr; | |
2110 | events->interrupt.soft = vcpu->arch.interrupt.soft; | |
2111 | ||
2112 | events->nmi.injected = vcpu->arch.nmi_injected; | |
2113 | events->nmi.pending = vcpu->arch.nmi_pending; | |
2114 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); | |
2115 | ||
2116 | events->sipi_vector = vcpu->arch.sipi_vector; | |
2117 | ||
dab4b911 JK |
2118 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
2119 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR); | |
3cfc3092 JK |
2120 | |
2121 | vcpu_put(vcpu); | |
2122 | } | |
2123 | ||
2124 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, | |
2125 | struct kvm_vcpu_events *events) | |
2126 | { | |
dab4b911 JK |
2127 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
2128 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR)) | |
3cfc3092 JK |
2129 | return -EINVAL; |
2130 | ||
2131 | vcpu_load(vcpu); | |
2132 | ||
2133 | vcpu->arch.exception.pending = events->exception.injected; | |
2134 | vcpu->arch.exception.nr = events->exception.nr; | |
2135 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
2136 | vcpu->arch.exception.error_code = events->exception.error_code; | |
2137 | ||
2138 | vcpu->arch.interrupt.pending = events->interrupt.injected; | |
2139 | vcpu->arch.interrupt.nr = events->interrupt.nr; | |
2140 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
2141 | if (vcpu->arch.interrupt.pending && irqchip_in_kernel(vcpu->kvm)) | |
2142 | kvm_pic_clear_isr_ack(vcpu->kvm); | |
2143 | ||
2144 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
2145 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
2146 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
2147 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
2148 | ||
dab4b911 JK |
2149 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR) |
2150 | vcpu->arch.sipi_vector = events->sipi_vector; | |
3cfc3092 JK |
2151 | |
2152 | vcpu_put(vcpu); | |
2153 | ||
2154 | return 0; | |
2155 | } | |
2156 | ||
313a3dc7 CO |
2157 | long kvm_arch_vcpu_ioctl(struct file *filp, |
2158 | unsigned int ioctl, unsigned long arg) | |
2159 | { | |
2160 | struct kvm_vcpu *vcpu = filp->private_data; | |
2161 | void __user *argp = (void __user *)arg; | |
2162 | int r; | |
b772ff36 | 2163 | struct kvm_lapic_state *lapic = NULL; |
313a3dc7 CO |
2164 | |
2165 | switch (ioctl) { | |
2166 | case KVM_GET_LAPIC: { | |
2204ae3c MT |
2167 | r = -EINVAL; |
2168 | if (!vcpu->arch.apic) | |
2169 | goto out; | |
b772ff36 | 2170 | lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 2171 | |
b772ff36 DH |
2172 | r = -ENOMEM; |
2173 | if (!lapic) | |
2174 | goto out; | |
2175 | r = kvm_vcpu_ioctl_get_lapic(vcpu, lapic); | |
313a3dc7 CO |
2176 | if (r) |
2177 | goto out; | |
2178 | r = -EFAULT; | |
b772ff36 | 2179 | if (copy_to_user(argp, lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
2180 | goto out; |
2181 | r = 0; | |
2182 | break; | |
2183 | } | |
2184 | case KVM_SET_LAPIC: { | |
2204ae3c MT |
2185 | r = -EINVAL; |
2186 | if (!vcpu->arch.apic) | |
2187 | goto out; | |
b772ff36 DH |
2188 | lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
2189 | r = -ENOMEM; | |
2190 | if (!lapic) | |
2191 | goto out; | |
313a3dc7 | 2192 | r = -EFAULT; |
b772ff36 | 2193 | if (copy_from_user(lapic, argp, sizeof(struct kvm_lapic_state))) |
313a3dc7 | 2194 | goto out; |
b772ff36 | 2195 | r = kvm_vcpu_ioctl_set_lapic(vcpu, lapic); |
313a3dc7 CO |
2196 | if (r) |
2197 | goto out; | |
2198 | r = 0; | |
2199 | break; | |
2200 | } | |
f77bc6a4 ZX |
2201 | case KVM_INTERRUPT: { |
2202 | struct kvm_interrupt irq; | |
2203 | ||
2204 | r = -EFAULT; | |
2205 | if (copy_from_user(&irq, argp, sizeof irq)) | |
2206 | goto out; | |
2207 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
2208 | if (r) | |
2209 | goto out; | |
2210 | r = 0; | |
2211 | break; | |
2212 | } | |
c4abb7c9 JK |
2213 | case KVM_NMI: { |
2214 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
2215 | if (r) | |
2216 | goto out; | |
2217 | r = 0; | |
2218 | break; | |
2219 | } | |
313a3dc7 CO |
2220 | case KVM_SET_CPUID: { |
2221 | struct kvm_cpuid __user *cpuid_arg = argp; | |
2222 | struct kvm_cpuid cpuid; | |
2223 | ||
2224 | r = -EFAULT; | |
2225 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2226 | goto out; | |
2227 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
2228 | if (r) | |
2229 | goto out; | |
2230 | break; | |
2231 | } | |
07716717 DK |
2232 | case KVM_SET_CPUID2: { |
2233 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
2234 | struct kvm_cpuid2 cpuid; | |
2235 | ||
2236 | r = -EFAULT; | |
2237 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2238 | goto out; | |
2239 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 2240 | cpuid_arg->entries); |
07716717 DK |
2241 | if (r) |
2242 | goto out; | |
2243 | break; | |
2244 | } | |
2245 | case KVM_GET_CPUID2: { | |
2246 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
2247 | struct kvm_cpuid2 cpuid; | |
2248 | ||
2249 | r = -EFAULT; | |
2250 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2251 | goto out; | |
2252 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 2253 | cpuid_arg->entries); |
07716717 DK |
2254 | if (r) |
2255 | goto out; | |
2256 | r = -EFAULT; | |
2257 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2258 | goto out; | |
2259 | r = 0; | |
2260 | break; | |
2261 | } | |
313a3dc7 CO |
2262 | case KVM_GET_MSRS: |
2263 | r = msr_io(vcpu, argp, kvm_get_msr, 1); | |
2264 | break; | |
2265 | case KVM_SET_MSRS: | |
2266 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
2267 | break; | |
b209749f AK |
2268 | case KVM_TPR_ACCESS_REPORTING: { |
2269 | struct kvm_tpr_access_ctl tac; | |
2270 | ||
2271 | r = -EFAULT; | |
2272 | if (copy_from_user(&tac, argp, sizeof tac)) | |
2273 | goto out; | |
2274 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
2275 | if (r) | |
2276 | goto out; | |
2277 | r = -EFAULT; | |
2278 | if (copy_to_user(argp, &tac, sizeof tac)) | |
2279 | goto out; | |
2280 | r = 0; | |
2281 | break; | |
2282 | }; | |
b93463aa AK |
2283 | case KVM_SET_VAPIC_ADDR: { |
2284 | struct kvm_vapic_addr va; | |
2285 | ||
2286 | r = -EINVAL; | |
2287 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2288 | goto out; | |
2289 | r = -EFAULT; | |
2290 | if (copy_from_user(&va, argp, sizeof va)) | |
2291 | goto out; | |
2292 | r = 0; | |
2293 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); | |
2294 | break; | |
2295 | } | |
890ca9ae HY |
2296 | case KVM_X86_SETUP_MCE: { |
2297 | u64 mcg_cap; | |
2298 | ||
2299 | r = -EFAULT; | |
2300 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
2301 | goto out; | |
2302 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
2303 | break; | |
2304 | } | |
2305 | case KVM_X86_SET_MCE: { | |
2306 | struct kvm_x86_mce mce; | |
2307 | ||
2308 | r = -EFAULT; | |
2309 | if (copy_from_user(&mce, argp, sizeof mce)) | |
2310 | goto out; | |
2311 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
2312 | break; | |
2313 | } | |
3cfc3092 JK |
2314 | case KVM_GET_VCPU_EVENTS: { |
2315 | struct kvm_vcpu_events events; | |
2316 | ||
2317 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
2318 | ||
2319 | r = -EFAULT; | |
2320 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
2321 | break; | |
2322 | r = 0; | |
2323 | break; | |
2324 | } | |
2325 | case KVM_SET_VCPU_EVENTS: { | |
2326 | struct kvm_vcpu_events events; | |
2327 | ||
2328 | r = -EFAULT; | |
2329 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
2330 | break; | |
2331 | ||
2332 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
2333 | break; | |
2334 | } | |
313a3dc7 CO |
2335 | default: |
2336 | r = -EINVAL; | |
2337 | } | |
2338 | out: | |
7a6ce84c | 2339 | kfree(lapic); |
313a3dc7 CO |
2340 | return r; |
2341 | } | |
2342 | ||
1fe779f8 CO |
2343 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
2344 | { | |
2345 | int ret; | |
2346 | ||
2347 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
2348 | return -1; | |
2349 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); | |
2350 | return ret; | |
2351 | } | |
2352 | ||
b927a3ce SY |
2353 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
2354 | u64 ident_addr) | |
2355 | { | |
2356 | kvm->arch.ept_identity_map_addr = ident_addr; | |
2357 | return 0; | |
2358 | } | |
2359 | ||
1fe779f8 CO |
2360 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
2361 | u32 kvm_nr_mmu_pages) | |
2362 | { | |
2363 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
2364 | return -EINVAL; | |
2365 | ||
79fac95e | 2366 | mutex_lock(&kvm->slots_lock); |
7c8a83b7 | 2367 | spin_lock(&kvm->mmu_lock); |
1fe779f8 CO |
2368 | |
2369 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 2370 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 2371 | |
7c8a83b7 | 2372 | spin_unlock(&kvm->mmu_lock); |
79fac95e | 2373 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
2374 | return 0; |
2375 | } | |
2376 | ||
2377 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
2378 | { | |
f05e70ac | 2379 | return kvm->arch.n_alloc_mmu_pages; |
1fe779f8 CO |
2380 | } |
2381 | ||
a983fb23 MT |
2382 | gfn_t unalias_gfn_instantiation(struct kvm *kvm, gfn_t gfn) |
2383 | { | |
2384 | int i; | |
2385 | struct kvm_mem_alias *alias; | |
2386 | struct kvm_mem_aliases *aliases; | |
2387 | ||
2388 | aliases = rcu_dereference(kvm->arch.aliases); | |
2389 | ||
2390 | for (i = 0; i < aliases->naliases; ++i) { | |
2391 | alias = &aliases->aliases[i]; | |
2392 | if (alias->flags & KVM_ALIAS_INVALID) | |
2393 | continue; | |
2394 | if (gfn >= alias->base_gfn | |
2395 | && gfn < alias->base_gfn + alias->npages) | |
2396 | return alias->target_gfn + gfn - alias->base_gfn; | |
2397 | } | |
2398 | return gfn; | |
2399 | } | |
2400 | ||
e9f85cde ZX |
2401 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
2402 | { | |
2403 | int i; | |
2404 | struct kvm_mem_alias *alias; | |
a983fb23 MT |
2405 | struct kvm_mem_aliases *aliases; |
2406 | ||
2407 | aliases = rcu_dereference(kvm->arch.aliases); | |
e9f85cde | 2408 | |
fef9cce0 MT |
2409 | for (i = 0; i < aliases->naliases; ++i) { |
2410 | alias = &aliases->aliases[i]; | |
e9f85cde ZX |
2411 | if (gfn >= alias->base_gfn |
2412 | && gfn < alias->base_gfn + alias->npages) | |
2413 | return alias->target_gfn + gfn - alias->base_gfn; | |
2414 | } | |
2415 | return gfn; | |
2416 | } | |
2417 | ||
1fe779f8 CO |
2418 | /* |
2419 | * Set a new alias region. Aliases map a portion of physical memory into | |
2420 | * another portion. This is useful for memory windows, for example the PC | |
2421 | * VGA region. | |
2422 | */ | |
2423 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
2424 | struct kvm_memory_alias *alias) | |
2425 | { | |
2426 | int r, n; | |
2427 | struct kvm_mem_alias *p; | |
a983fb23 | 2428 | struct kvm_mem_aliases *aliases, *old_aliases; |
1fe779f8 CO |
2429 | |
2430 | r = -EINVAL; | |
2431 | /* General sanity checks */ | |
2432 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
2433 | goto out; | |
2434 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
2435 | goto out; | |
2436 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
2437 | goto out; | |
2438 | if (alias->guest_phys_addr + alias->memory_size | |
2439 | < alias->guest_phys_addr) | |
2440 | goto out; | |
2441 | if (alias->target_phys_addr + alias->memory_size | |
2442 | < alias->target_phys_addr) | |
2443 | goto out; | |
2444 | ||
a983fb23 MT |
2445 | r = -ENOMEM; |
2446 | aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL); | |
2447 | if (!aliases) | |
2448 | goto out; | |
2449 | ||
79fac95e | 2450 | mutex_lock(&kvm->slots_lock); |
1fe779f8 | 2451 | |
a983fb23 MT |
2452 | /* invalidate any gfn reference in case of deletion/shrinking */ |
2453 | memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases)); | |
2454 | aliases->aliases[alias->slot].flags |= KVM_ALIAS_INVALID; | |
2455 | old_aliases = kvm->arch.aliases; | |
2456 | rcu_assign_pointer(kvm->arch.aliases, aliases); | |
2457 | synchronize_srcu_expedited(&kvm->srcu); | |
2458 | kvm_mmu_zap_all(kvm); | |
2459 | kfree(old_aliases); | |
2460 | ||
2461 | r = -ENOMEM; | |
2462 | aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL); | |
2463 | if (!aliases) | |
2464 | goto out_unlock; | |
2465 | ||
2466 | memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases)); | |
fef9cce0 MT |
2467 | |
2468 | p = &aliases->aliases[alias->slot]; | |
1fe779f8 CO |
2469 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; |
2470 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
2471 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
a983fb23 | 2472 | p->flags &= ~(KVM_ALIAS_INVALID); |
1fe779f8 CO |
2473 | |
2474 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
fef9cce0 | 2475 | if (aliases->aliases[n - 1].npages) |
1fe779f8 | 2476 | break; |
fef9cce0 | 2477 | aliases->naliases = n; |
1fe779f8 | 2478 | |
a983fb23 MT |
2479 | old_aliases = kvm->arch.aliases; |
2480 | rcu_assign_pointer(kvm->arch.aliases, aliases); | |
2481 | synchronize_srcu_expedited(&kvm->srcu); | |
2482 | kfree(old_aliases); | |
2483 | r = 0; | |
1fe779f8 | 2484 | |
a983fb23 | 2485 | out_unlock: |
79fac95e | 2486 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
2487 | out: |
2488 | return r; | |
2489 | } | |
2490 | ||
2491 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
2492 | { | |
2493 | int r; | |
2494 | ||
2495 | r = 0; | |
2496 | switch (chip->chip_id) { | |
2497 | case KVM_IRQCHIP_PIC_MASTER: | |
2498 | memcpy(&chip->chip.pic, | |
2499 | &pic_irqchip(kvm)->pics[0], | |
2500 | sizeof(struct kvm_pic_state)); | |
2501 | break; | |
2502 | case KVM_IRQCHIP_PIC_SLAVE: | |
2503 | memcpy(&chip->chip.pic, | |
2504 | &pic_irqchip(kvm)->pics[1], | |
2505 | sizeof(struct kvm_pic_state)); | |
2506 | break; | |
2507 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 2508 | r = kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
2509 | break; |
2510 | default: | |
2511 | r = -EINVAL; | |
2512 | break; | |
2513 | } | |
2514 | return r; | |
2515 | } | |
2516 | ||
2517 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
2518 | { | |
2519 | int r; | |
2520 | ||
2521 | r = 0; | |
2522 | switch (chip->chip_id) { | |
2523 | case KVM_IRQCHIP_PIC_MASTER: | |
fa8273e9 | 2524 | raw_spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2525 | memcpy(&pic_irqchip(kvm)->pics[0], |
2526 | &chip->chip.pic, | |
2527 | sizeof(struct kvm_pic_state)); | |
fa8273e9 | 2528 | raw_spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2529 | break; |
2530 | case KVM_IRQCHIP_PIC_SLAVE: | |
fa8273e9 | 2531 | raw_spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2532 | memcpy(&pic_irqchip(kvm)->pics[1], |
2533 | &chip->chip.pic, | |
2534 | sizeof(struct kvm_pic_state)); | |
fa8273e9 | 2535 | raw_spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2536 | break; |
2537 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 2538 | r = kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
2539 | break; |
2540 | default: | |
2541 | r = -EINVAL; | |
2542 | break; | |
2543 | } | |
2544 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
2545 | return r; | |
2546 | } | |
2547 | ||
e0f63cb9 SY |
2548 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
2549 | { | |
2550 | int r = 0; | |
2551 | ||
894a9c55 | 2552 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 2553 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); |
894a9c55 | 2554 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
2555 | return r; |
2556 | } | |
2557 | ||
2558 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
2559 | { | |
2560 | int r = 0; | |
2561 | ||
894a9c55 | 2562 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 2563 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); |
e9f42757 BK |
2564 | kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0); |
2565 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
2566 | return r; | |
2567 | } | |
2568 | ||
2569 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
2570 | { | |
2571 | int r = 0; | |
2572 | ||
2573 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
2574 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
2575 | sizeof(ps->channels)); | |
2576 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
2577 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
2578 | return r; | |
2579 | } | |
2580 | ||
2581 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
2582 | { | |
2583 | int r = 0, start = 0; | |
2584 | u32 prev_legacy, cur_legacy; | |
2585 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
2586 | prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
2587 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
2588 | if (!prev_legacy && cur_legacy) | |
2589 | start = 1; | |
2590 | memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels, | |
2591 | sizeof(kvm->arch.vpit->pit_state.channels)); | |
2592 | kvm->arch.vpit->pit_state.flags = ps->flags; | |
2593 | kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start); | |
894a9c55 | 2594 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
2595 | return r; |
2596 | } | |
2597 | ||
52d939a0 MT |
2598 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
2599 | struct kvm_reinject_control *control) | |
2600 | { | |
2601 | if (!kvm->arch.vpit) | |
2602 | return -ENXIO; | |
894a9c55 | 2603 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 | 2604 | kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject; |
894a9c55 | 2605 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 MT |
2606 | return 0; |
2607 | } | |
2608 | ||
5bb064dc ZX |
2609 | /* |
2610 | * Get (and clear) the dirty memory log for a memory slot. | |
2611 | */ | |
2612 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
2613 | struct kvm_dirty_log *log) | |
2614 | { | |
b050b015 | 2615 | int r, n, i; |
5bb064dc | 2616 | struct kvm_memory_slot *memslot; |
b050b015 MT |
2617 | unsigned long is_dirty = 0; |
2618 | unsigned long *dirty_bitmap = NULL; | |
5bb064dc | 2619 | |
79fac95e | 2620 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 2621 | |
b050b015 MT |
2622 | r = -EINVAL; |
2623 | if (log->slot >= KVM_MEMORY_SLOTS) | |
2624 | goto out; | |
2625 | ||
2626 | memslot = &kvm->memslots->memslots[log->slot]; | |
2627 | r = -ENOENT; | |
2628 | if (!memslot->dirty_bitmap) | |
2629 | goto out; | |
2630 | ||
2631 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; | |
2632 | ||
2633 | r = -ENOMEM; | |
2634 | dirty_bitmap = vmalloc(n); | |
2635 | if (!dirty_bitmap) | |
5bb064dc | 2636 | goto out; |
b050b015 MT |
2637 | memset(dirty_bitmap, 0, n); |
2638 | ||
2639 | for (i = 0; !is_dirty && i < n/sizeof(long); i++) | |
2640 | is_dirty = memslot->dirty_bitmap[i]; | |
5bb064dc ZX |
2641 | |
2642 | /* If nothing is dirty, don't bother messing with page tables. */ | |
2643 | if (is_dirty) { | |
b050b015 MT |
2644 | struct kvm_memslots *slots, *old_slots; |
2645 | ||
7c8a83b7 | 2646 | spin_lock(&kvm->mmu_lock); |
5bb064dc | 2647 | kvm_mmu_slot_remove_write_access(kvm, log->slot); |
7c8a83b7 | 2648 | spin_unlock(&kvm->mmu_lock); |
b050b015 MT |
2649 | |
2650 | slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); | |
2651 | if (!slots) | |
2652 | goto out_free; | |
2653 | ||
2654 | memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots)); | |
2655 | slots->memslots[log->slot].dirty_bitmap = dirty_bitmap; | |
2656 | ||
2657 | old_slots = kvm->memslots; | |
2658 | rcu_assign_pointer(kvm->memslots, slots); | |
2659 | synchronize_srcu_expedited(&kvm->srcu); | |
2660 | dirty_bitmap = old_slots->memslots[log->slot].dirty_bitmap; | |
2661 | kfree(old_slots); | |
5bb064dc | 2662 | } |
b050b015 | 2663 | |
5bb064dc | 2664 | r = 0; |
b050b015 MT |
2665 | if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n)) |
2666 | r = -EFAULT; | |
2667 | out_free: | |
2668 | vfree(dirty_bitmap); | |
5bb064dc | 2669 | out: |
79fac95e | 2670 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
2671 | return r; |
2672 | } | |
2673 | ||
1fe779f8 CO |
2674 | long kvm_arch_vm_ioctl(struct file *filp, |
2675 | unsigned int ioctl, unsigned long arg) | |
2676 | { | |
2677 | struct kvm *kvm = filp->private_data; | |
2678 | void __user *argp = (void __user *)arg; | |
367e1319 | 2679 | int r = -ENOTTY; |
f0d66275 DH |
2680 | /* |
2681 | * This union makes it completely explicit to gcc-3.x | |
2682 | * that these two variables' stack usage should be | |
2683 | * combined, not added together. | |
2684 | */ | |
2685 | union { | |
2686 | struct kvm_pit_state ps; | |
e9f42757 | 2687 | struct kvm_pit_state2 ps2; |
f0d66275 | 2688 | struct kvm_memory_alias alias; |
c5ff41ce | 2689 | struct kvm_pit_config pit_config; |
f0d66275 | 2690 | } u; |
1fe779f8 CO |
2691 | |
2692 | switch (ioctl) { | |
2693 | case KVM_SET_TSS_ADDR: | |
2694 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
2695 | if (r < 0) | |
2696 | goto out; | |
2697 | break; | |
b927a3ce SY |
2698 | case KVM_SET_IDENTITY_MAP_ADDR: { |
2699 | u64 ident_addr; | |
2700 | ||
2701 | r = -EFAULT; | |
2702 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
2703 | goto out; | |
2704 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); | |
2705 | if (r < 0) | |
2706 | goto out; | |
2707 | break; | |
2708 | } | |
1fe779f8 CO |
2709 | case KVM_SET_MEMORY_REGION: { |
2710 | struct kvm_memory_region kvm_mem; | |
2711 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
2712 | ||
2713 | r = -EFAULT; | |
2714 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) | |
2715 | goto out; | |
2716 | kvm_userspace_mem.slot = kvm_mem.slot; | |
2717 | kvm_userspace_mem.flags = kvm_mem.flags; | |
2718 | kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr; | |
2719 | kvm_userspace_mem.memory_size = kvm_mem.memory_size; | |
2720 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
2721 | if (r) | |
2722 | goto out; | |
2723 | break; | |
2724 | } | |
2725 | case KVM_SET_NR_MMU_PAGES: | |
2726 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
2727 | if (r) | |
2728 | goto out; | |
2729 | break; | |
2730 | case KVM_GET_NR_MMU_PAGES: | |
2731 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
2732 | break; | |
f0d66275 | 2733 | case KVM_SET_MEMORY_ALIAS: |
1fe779f8 | 2734 | r = -EFAULT; |
f0d66275 | 2735 | if (copy_from_user(&u.alias, argp, sizeof(struct kvm_memory_alias))) |
1fe779f8 | 2736 | goto out; |
f0d66275 | 2737 | r = kvm_vm_ioctl_set_memory_alias(kvm, &u.alias); |
1fe779f8 CO |
2738 | if (r) |
2739 | goto out; | |
2740 | break; | |
3ddea128 MT |
2741 | case KVM_CREATE_IRQCHIP: { |
2742 | struct kvm_pic *vpic; | |
2743 | ||
2744 | mutex_lock(&kvm->lock); | |
2745 | r = -EEXIST; | |
2746 | if (kvm->arch.vpic) | |
2747 | goto create_irqchip_unlock; | |
1fe779f8 | 2748 | r = -ENOMEM; |
3ddea128 MT |
2749 | vpic = kvm_create_pic(kvm); |
2750 | if (vpic) { | |
1fe779f8 CO |
2751 | r = kvm_ioapic_init(kvm); |
2752 | if (r) { | |
72bb2fcd WY |
2753 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, |
2754 | &vpic->dev); | |
3ddea128 MT |
2755 | kfree(vpic); |
2756 | goto create_irqchip_unlock; | |
1fe779f8 CO |
2757 | } |
2758 | } else | |
3ddea128 MT |
2759 | goto create_irqchip_unlock; |
2760 | smp_wmb(); | |
2761 | kvm->arch.vpic = vpic; | |
2762 | smp_wmb(); | |
399ec807 AK |
2763 | r = kvm_setup_default_irq_routing(kvm); |
2764 | if (r) { | |
3ddea128 | 2765 | mutex_lock(&kvm->irq_lock); |
72bb2fcd WY |
2766 | kvm_ioapic_destroy(kvm); |
2767 | kvm_destroy_pic(kvm); | |
3ddea128 | 2768 | mutex_unlock(&kvm->irq_lock); |
399ec807 | 2769 | } |
3ddea128 MT |
2770 | create_irqchip_unlock: |
2771 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 2772 | break; |
3ddea128 | 2773 | } |
7837699f | 2774 | case KVM_CREATE_PIT: |
c5ff41ce JK |
2775 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
2776 | goto create_pit; | |
2777 | case KVM_CREATE_PIT2: | |
2778 | r = -EFAULT; | |
2779 | if (copy_from_user(&u.pit_config, argp, | |
2780 | sizeof(struct kvm_pit_config))) | |
2781 | goto out; | |
2782 | create_pit: | |
79fac95e | 2783 | mutex_lock(&kvm->slots_lock); |
269e05e4 AK |
2784 | r = -EEXIST; |
2785 | if (kvm->arch.vpit) | |
2786 | goto create_pit_unlock; | |
7837699f | 2787 | r = -ENOMEM; |
c5ff41ce | 2788 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
2789 | if (kvm->arch.vpit) |
2790 | r = 0; | |
269e05e4 | 2791 | create_pit_unlock: |
79fac95e | 2792 | mutex_unlock(&kvm->slots_lock); |
7837699f | 2793 | break; |
4925663a | 2794 | case KVM_IRQ_LINE_STATUS: |
1fe779f8 CO |
2795 | case KVM_IRQ_LINE: { |
2796 | struct kvm_irq_level irq_event; | |
2797 | ||
2798 | r = -EFAULT; | |
2799 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
2800 | goto out; | |
2801 | if (irqchip_in_kernel(kvm)) { | |
4925663a | 2802 | __s32 status; |
4925663a GN |
2803 | status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
2804 | irq_event.irq, irq_event.level); | |
4925663a GN |
2805 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
2806 | irq_event.status = status; | |
2807 | if (copy_to_user(argp, &irq_event, | |
2808 | sizeof irq_event)) | |
2809 | goto out; | |
2810 | } | |
1fe779f8 CO |
2811 | r = 0; |
2812 | } | |
2813 | break; | |
2814 | } | |
2815 | case KVM_GET_IRQCHIP: { | |
2816 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 2817 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 2818 | |
f0d66275 DH |
2819 | r = -ENOMEM; |
2820 | if (!chip) | |
1fe779f8 | 2821 | goto out; |
f0d66275 DH |
2822 | r = -EFAULT; |
2823 | if (copy_from_user(chip, argp, sizeof *chip)) | |
2824 | goto get_irqchip_out; | |
1fe779f8 CO |
2825 | r = -ENXIO; |
2826 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
2827 | goto get_irqchip_out; |
2828 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 2829 | if (r) |
f0d66275 | 2830 | goto get_irqchip_out; |
1fe779f8 | 2831 | r = -EFAULT; |
f0d66275 DH |
2832 | if (copy_to_user(argp, chip, sizeof *chip)) |
2833 | goto get_irqchip_out; | |
1fe779f8 | 2834 | r = 0; |
f0d66275 DH |
2835 | get_irqchip_out: |
2836 | kfree(chip); | |
2837 | if (r) | |
2838 | goto out; | |
1fe779f8 CO |
2839 | break; |
2840 | } | |
2841 | case KVM_SET_IRQCHIP: { | |
2842 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 2843 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 2844 | |
f0d66275 DH |
2845 | r = -ENOMEM; |
2846 | if (!chip) | |
1fe779f8 | 2847 | goto out; |
f0d66275 DH |
2848 | r = -EFAULT; |
2849 | if (copy_from_user(chip, argp, sizeof *chip)) | |
2850 | goto set_irqchip_out; | |
1fe779f8 CO |
2851 | r = -ENXIO; |
2852 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
2853 | goto set_irqchip_out; |
2854 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 2855 | if (r) |
f0d66275 | 2856 | goto set_irqchip_out; |
1fe779f8 | 2857 | r = 0; |
f0d66275 DH |
2858 | set_irqchip_out: |
2859 | kfree(chip); | |
2860 | if (r) | |
2861 | goto out; | |
1fe779f8 CO |
2862 | break; |
2863 | } | |
e0f63cb9 | 2864 | case KVM_GET_PIT: { |
e0f63cb9 | 2865 | r = -EFAULT; |
f0d66275 | 2866 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
2867 | goto out; |
2868 | r = -ENXIO; | |
2869 | if (!kvm->arch.vpit) | |
2870 | goto out; | |
f0d66275 | 2871 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
2872 | if (r) |
2873 | goto out; | |
2874 | r = -EFAULT; | |
f0d66275 | 2875 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
2876 | goto out; |
2877 | r = 0; | |
2878 | break; | |
2879 | } | |
2880 | case KVM_SET_PIT: { | |
e0f63cb9 | 2881 | r = -EFAULT; |
f0d66275 | 2882 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
2883 | goto out; |
2884 | r = -ENXIO; | |
2885 | if (!kvm->arch.vpit) | |
2886 | goto out; | |
f0d66275 | 2887 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
2888 | if (r) |
2889 | goto out; | |
2890 | r = 0; | |
2891 | break; | |
2892 | } | |
e9f42757 BK |
2893 | case KVM_GET_PIT2: { |
2894 | r = -ENXIO; | |
2895 | if (!kvm->arch.vpit) | |
2896 | goto out; | |
2897 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
2898 | if (r) | |
2899 | goto out; | |
2900 | r = -EFAULT; | |
2901 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
2902 | goto out; | |
2903 | r = 0; | |
2904 | break; | |
2905 | } | |
2906 | case KVM_SET_PIT2: { | |
2907 | r = -EFAULT; | |
2908 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
2909 | goto out; | |
2910 | r = -ENXIO; | |
2911 | if (!kvm->arch.vpit) | |
2912 | goto out; | |
2913 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
2914 | if (r) | |
2915 | goto out; | |
2916 | r = 0; | |
2917 | break; | |
2918 | } | |
52d939a0 MT |
2919 | case KVM_REINJECT_CONTROL: { |
2920 | struct kvm_reinject_control control; | |
2921 | r = -EFAULT; | |
2922 | if (copy_from_user(&control, argp, sizeof(control))) | |
2923 | goto out; | |
2924 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
2925 | if (r) | |
2926 | goto out; | |
2927 | r = 0; | |
2928 | break; | |
2929 | } | |
ffde22ac ES |
2930 | case KVM_XEN_HVM_CONFIG: { |
2931 | r = -EFAULT; | |
2932 | if (copy_from_user(&kvm->arch.xen_hvm_config, argp, | |
2933 | sizeof(struct kvm_xen_hvm_config))) | |
2934 | goto out; | |
2935 | r = -EINVAL; | |
2936 | if (kvm->arch.xen_hvm_config.flags) | |
2937 | goto out; | |
2938 | r = 0; | |
2939 | break; | |
2940 | } | |
afbcf7ab GC |
2941 | case KVM_SET_CLOCK: { |
2942 | struct timespec now; | |
2943 | struct kvm_clock_data user_ns; | |
2944 | u64 now_ns; | |
2945 | s64 delta; | |
2946 | ||
2947 | r = -EFAULT; | |
2948 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
2949 | goto out; | |
2950 | ||
2951 | r = -EINVAL; | |
2952 | if (user_ns.flags) | |
2953 | goto out; | |
2954 | ||
2955 | r = 0; | |
2956 | ktime_get_ts(&now); | |
2957 | now_ns = timespec_to_ns(&now); | |
2958 | delta = user_ns.clock - now_ns; | |
2959 | kvm->arch.kvmclock_offset = delta; | |
2960 | break; | |
2961 | } | |
2962 | case KVM_GET_CLOCK: { | |
2963 | struct timespec now; | |
2964 | struct kvm_clock_data user_ns; | |
2965 | u64 now_ns; | |
2966 | ||
2967 | ktime_get_ts(&now); | |
2968 | now_ns = timespec_to_ns(&now); | |
2969 | user_ns.clock = kvm->arch.kvmclock_offset + now_ns; | |
2970 | user_ns.flags = 0; | |
2971 | ||
2972 | r = -EFAULT; | |
2973 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
2974 | goto out; | |
2975 | r = 0; | |
2976 | break; | |
2977 | } | |
2978 | ||
1fe779f8 CO |
2979 | default: |
2980 | ; | |
2981 | } | |
2982 | out: | |
2983 | return r; | |
2984 | } | |
2985 | ||
a16b043c | 2986 | static void kvm_init_msr_list(void) |
043405e1 CO |
2987 | { |
2988 | u32 dummy[2]; | |
2989 | unsigned i, j; | |
2990 | ||
e3267cbb GC |
2991 | /* skip the first msrs in the list. KVM-specific */ |
2992 | for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) { | |
043405e1 CO |
2993 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
2994 | continue; | |
2995 | if (j < i) | |
2996 | msrs_to_save[j] = msrs_to_save[i]; | |
2997 | j++; | |
2998 | } | |
2999 | num_msrs_to_save = j; | |
3000 | } | |
3001 | ||
bda9020e MT |
3002 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
3003 | const void *v) | |
bbd9b64e | 3004 | { |
bda9020e MT |
3005 | if (vcpu->arch.apic && |
3006 | !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, len, v)) | |
3007 | return 0; | |
bbd9b64e | 3008 | |
e93f8a0f | 3009 | return kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, len, v); |
bbd9b64e CO |
3010 | } |
3011 | ||
bda9020e | 3012 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 3013 | { |
bda9020e MT |
3014 | if (vcpu->arch.apic && |
3015 | !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, len, v)) | |
3016 | return 0; | |
bbd9b64e | 3017 | |
e93f8a0f | 3018 | return kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, len, v); |
bbd9b64e CO |
3019 | } |
3020 | ||
1871c602 GN |
3021 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) |
3022 | { | |
3023 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3024 | return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error); | |
3025 | } | |
3026 | ||
3027 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) | |
3028 | { | |
3029 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3030 | access |= PFERR_FETCH_MASK; | |
3031 | return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error); | |
3032 | } | |
3033 | ||
3034 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) | |
3035 | { | |
3036 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3037 | access |= PFERR_WRITE_MASK; | |
3038 | return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error); | |
3039 | } | |
3040 | ||
3041 | /* uses this to access any guest's mapped memory without checking CPL */ | |
3042 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) | |
3043 | { | |
3044 | return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, 0, error); | |
3045 | } | |
3046 | ||
3047 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
3048 | struct kvm_vcpu *vcpu, u32 access, | |
3049 | u32 *error) | |
bbd9b64e CO |
3050 | { |
3051 | void *data = val; | |
10589a46 | 3052 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
3053 | |
3054 | while (bytes) { | |
1871c602 | 3055 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr, access, error); |
bbd9b64e | 3056 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 3057 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
3058 | int ret; |
3059 | ||
10589a46 MT |
3060 | if (gpa == UNMAPPED_GVA) { |
3061 | r = X86EMUL_PROPAGATE_FAULT; | |
3062 | goto out; | |
3063 | } | |
77c2002e | 3064 | ret = kvm_read_guest(vcpu->kvm, gpa, data, toread); |
10589a46 MT |
3065 | if (ret < 0) { |
3066 | r = X86EMUL_UNHANDLEABLE; | |
3067 | goto out; | |
3068 | } | |
bbd9b64e | 3069 | |
77c2002e IE |
3070 | bytes -= toread; |
3071 | data += toread; | |
3072 | addr += toread; | |
bbd9b64e | 3073 | } |
10589a46 | 3074 | out: |
10589a46 | 3075 | return r; |
bbd9b64e | 3076 | } |
77c2002e | 3077 | |
1871c602 GN |
3078 | /* used for instruction fetching */ |
3079 | static int kvm_fetch_guest_virt(gva_t addr, void *val, unsigned int bytes, | |
3080 | struct kvm_vcpu *vcpu, u32 *error) | |
3081 | { | |
3082 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3083 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, | |
3084 | access | PFERR_FETCH_MASK, error); | |
3085 | } | |
3086 | ||
3087 | static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes, | |
3088 | struct kvm_vcpu *vcpu, u32 *error) | |
3089 | { | |
3090 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3091 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, | |
3092 | error); | |
3093 | } | |
3094 | ||
3095 | static int kvm_read_guest_virt_system(gva_t addr, void *val, unsigned int bytes, | |
3096 | struct kvm_vcpu *vcpu, u32 *error) | |
3097 | { | |
3098 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, error); | |
3099 | } | |
3100 | ||
cded19f3 | 3101 | static int kvm_write_guest_virt(gva_t addr, void *val, unsigned int bytes, |
1871c602 | 3102 | struct kvm_vcpu *vcpu, u32 *error) |
77c2002e IE |
3103 | { |
3104 | void *data = val; | |
3105 | int r = X86EMUL_CONTINUE; | |
3106 | ||
3107 | while (bytes) { | |
1871c602 | 3108 | gpa_t gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, error); |
77c2002e IE |
3109 | unsigned offset = addr & (PAGE_SIZE-1); |
3110 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
3111 | int ret; | |
3112 | ||
3113 | if (gpa == UNMAPPED_GVA) { | |
3114 | r = X86EMUL_PROPAGATE_FAULT; | |
3115 | goto out; | |
3116 | } | |
3117 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); | |
3118 | if (ret < 0) { | |
3119 | r = X86EMUL_UNHANDLEABLE; | |
3120 | goto out; | |
3121 | } | |
3122 | ||
3123 | bytes -= towrite; | |
3124 | data += towrite; | |
3125 | addr += towrite; | |
3126 | } | |
3127 | out: | |
3128 | return r; | |
3129 | } | |
3130 | ||
bbd9b64e | 3131 | |
bbd9b64e CO |
3132 | static int emulator_read_emulated(unsigned long addr, |
3133 | void *val, | |
3134 | unsigned int bytes, | |
3135 | struct kvm_vcpu *vcpu) | |
3136 | { | |
bbd9b64e | 3137 | gpa_t gpa; |
1871c602 | 3138 | u32 error_code; |
bbd9b64e CO |
3139 | |
3140 | if (vcpu->mmio_read_completed) { | |
3141 | memcpy(val, vcpu->mmio_data, bytes); | |
aec51dc4 AK |
3142 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
3143 | vcpu->mmio_phys_addr, *(u64 *)val); | |
bbd9b64e CO |
3144 | vcpu->mmio_read_completed = 0; |
3145 | return X86EMUL_CONTINUE; | |
3146 | } | |
3147 | ||
1871c602 GN |
3148 | gpa = kvm_mmu_gva_to_gpa_read(vcpu, addr, &error_code); |
3149 | ||
3150 | if (gpa == UNMAPPED_GVA) { | |
3151 | kvm_inject_page_fault(vcpu, addr, error_code); | |
3152 | return X86EMUL_PROPAGATE_FAULT; | |
3153 | } | |
bbd9b64e CO |
3154 | |
3155 | /* For APIC access vmexit */ | |
3156 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3157 | goto mmio; | |
3158 | ||
1871c602 | 3159 | if (kvm_read_guest_virt(addr, val, bytes, vcpu, NULL) |
77c2002e | 3160 | == X86EMUL_CONTINUE) |
bbd9b64e | 3161 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
3162 | |
3163 | mmio: | |
3164 | /* | |
3165 | * Is this MMIO handled locally? | |
3166 | */ | |
aec51dc4 AK |
3167 | if (!vcpu_mmio_read(vcpu, gpa, bytes, val)) { |
3168 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, gpa, *(u64 *)val); | |
bbd9b64e CO |
3169 | return X86EMUL_CONTINUE; |
3170 | } | |
aec51dc4 AK |
3171 | |
3172 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
bbd9b64e CO |
3173 | |
3174 | vcpu->mmio_needed = 1; | |
3175 | vcpu->mmio_phys_addr = gpa; | |
3176 | vcpu->mmio_size = bytes; | |
3177 | vcpu->mmio_is_write = 0; | |
3178 | ||
3179 | return X86EMUL_UNHANDLEABLE; | |
3180 | } | |
3181 | ||
3200f405 | 3182 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
9f811285 | 3183 | const void *val, int bytes) |
bbd9b64e CO |
3184 | { |
3185 | int ret; | |
3186 | ||
3187 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); | |
9f811285 | 3188 | if (ret < 0) |
bbd9b64e | 3189 | return 0; |
ad218f85 | 3190 | kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1); |
bbd9b64e CO |
3191 | return 1; |
3192 | } | |
3193 | ||
3194 | static int emulator_write_emulated_onepage(unsigned long addr, | |
3195 | const void *val, | |
3196 | unsigned int bytes, | |
3197 | struct kvm_vcpu *vcpu) | |
3198 | { | |
10589a46 | 3199 | gpa_t gpa; |
1871c602 | 3200 | u32 error_code; |
10589a46 | 3201 | |
1871c602 | 3202 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, &error_code); |
bbd9b64e CO |
3203 | |
3204 | if (gpa == UNMAPPED_GVA) { | |
1871c602 | 3205 | kvm_inject_page_fault(vcpu, addr, error_code); |
bbd9b64e CO |
3206 | return X86EMUL_PROPAGATE_FAULT; |
3207 | } | |
3208 | ||
3209 | /* For APIC access vmexit */ | |
3210 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3211 | goto mmio; | |
3212 | ||
3213 | if (emulator_write_phys(vcpu, gpa, val, bytes)) | |
3214 | return X86EMUL_CONTINUE; | |
3215 | ||
3216 | mmio: | |
aec51dc4 | 3217 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); |
bbd9b64e CO |
3218 | /* |
3219 | * Is this MMIO handled locally? | |
3220 | */ | |
bda9020e | 3221 | if (!vcpu_mmio_write(vcpu, gpa, bytes, val)) |
bbd9b64e | 3222 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
3223 | |
3224 | vcpu->mmio_needed = 1; | |
3225 | vcpu->mmio_phys_addr = gpa; | |
3226 | vcpu->mmio_size = bytes; | |
3227 | vcpu->mmio_is_write = 1; | |
3228 | memcpy(vcpu->mmio_data, val, bytes); | |
3229 | ||
3230 | return X86EMUL_CONTINUE; | |
3231 | } | |
3232 | ||
3233 | int emulator_write_emulated(unsigned long addr, | |
3234 | const void *val, | |
3235 | unsigned int bytes, | |
3236 | struct kvm_vcpu *vcpu) | |
3237 | { | |
3238 | /* Crossing a page boundary? */ | |
3239 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
3240 | int rc, now; | |
3241 | ||
3242 | now = -addr & ~PAGE_MASK; | |
3243 | rc = emulator_write_emulated_onepage(addr, val, now, vcpu); | |
3244 | if (rc != X86EMUL_CONTINUE) | |
3245 | return rc; | |
3246 | addr += now; | |
3247 | val += now; | |
3248 | bytes -= now; | |
3249 | } | |
3250 | return emulator_write_emulated_onepage(addr, val, bytes, vcpu); | |
3251 | } | |
3252 | EXPORT_SYMBOL_GPL(emulator_write_emulated); | |
3253 | ||
3254 | static int emulator_cmpxchg_emulated(unsigned long addr, | |
3255 | const void *old, | |
3256 | const void *new, | |
3257 | unsigned int bytes, | |
3258 | struct kvm_vcpu *vcpu) | |
3259 | { | |
9f51e24e | 3260 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c MT |
3261 | #ifndef CONFIG_X86_64 |
3262 | /* guests cmpxchg8b have to be emulated atomically */ | |
3263 | if (bytes == 8) { | |
10589a46 | 3264 | gpa_t gpa; |
2bacc55c | 3265 | struct page *page; |
c0b49b0d | 3266 | char *kaddr; |
2bacc55c MT |
3267 | u64 val; |
3268 | ||
1871c602 | 3269 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
10589a46 | 3270 | |
2bacc55c MT |
3271 | if (gpa == UNMAPPED_GVA || |
3272 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3273 | goto emul_write; | |
3274 | ||
3275 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) | |
3276 | goto emul_write; | |
3277 | ||
3278 | val = *(u64 *)new; | |
72dc67a6 | 3279 | |
2bacc55c | 3280 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
72dc67a6 | 3281 | |
c0b49b0d AM |
3282 | kaddr = kmap_atomic(page, KM_USER0); |
3283 | set_64bit((u64 *)(kaddr + offset_in_page(gpa)), val); | |
3284 | kunmap_atomic(kaddr, KM_USER0); | |
2bacc55c MT |
3285 | kvm_release_page_dirty(page); |
3286 | } | |
3200f405 | 3287 | emul_write: |
2bacc55c MT |
3288 | #endif |
3289 | ||
bbd9b64e CO |
3290 | return emulator_write_emulated(addr, new, bytes, vcpu); |
3291 | } | |
3292 | ||
3293 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
3294 | { | |
3295 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
3296 | } | |
3297 | ||
3298 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
3299 | { | |
a7052897 | 3300 | kvm_mmu_invlpg(vcpu, address); |
bbd9b64e CO |
3301 | return X86EMUL_CONTINUE; |
3302 | } | |
3303 | ||
3304 | int emulate_clts(struct kvm_vcpu *vcpu) | |
3305 | { | |
4d4ec087 | 3306 | kvm_x86_ops->set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS)); |
6b52d186 | 3307 | kvm_x86_ops->fpu_activate(vcpu); |
bbd9b64e CO |
3308 | return X86EMUL_CONTINUE; |
3309 | } | |
3310 | ||
3311 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) | |
3312 | { | |
c76de350 | 3313 | return kvm_x86_ops->get_dr(ctxt->vcpu, dr, dest); |
bbd9b64e CO |
3314 | } |
3315 | ||
3316 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
3317 | { | |
3318 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
bbd9b64e | 3319 | |
c76de350 | 3320 | return kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask); |
bbd9b64e CO |
3321 | } |
3322 | ||
3323 | void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context) | |
3324 | { | |
bbd9b64e | 3325 | u8 opcodes[4]; |
5fdbf976 | 3326 | unsigned long rip = kvm_rip_read(vcpu); |
bbd9b64e CO |
3327 | unsigned long rip_linear; |
3328 | ||
f76c710d | 3329 | if (!printk_ratelimit()) |
bbd9b64e CO |
3330 | return; |
3331 | ||
25be4608 GC |
3332 | rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS); |
3333 | ||
1871c602 | 3334 | kvm_read_guest_virt(rip_linear, (void *)opcodes, 4, vcpu, NULL); |
bbd9b64e CO |
3335 | |
3336 | printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n", | |
3337 | context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
bbd9b64e CO |
3338 | } |
3339 | EXPORT_SYMBOL_GPL(kvm_report_emulation_failure); | |
3340 | ||
14af3f3c | 3341 | static struct x86_emulate_ops emulate_ops = { |
1871c602 GN |
3342 | .read_std = kvm_read_guest_virt_system, |
3343 | .fetch = kvm_fetch_guest_virt, | |
bbd9b64e CO |
3344 | .read_emulated = emulator_read_emulated, |
3345 | .write_emulated = emulator_write_emulated, | |
3346 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
3347 | }; | |
3348 | ||
5fdbf976 MT |
3349 | static void cache_all_regs(struct kvm_vcpu *vcpu) |
3350 | { | |
3351 | kvm_register_read(vcpu, VCPU_REGS_RAX); | |
3352 | kvm_register_read(vcpu, VCPU_REGS_RSP); | |
3353 | kvm_register_read(vcpu, VCPU_REGS_RIP); | |
3354 | vcpu->arch.regs_dirty = ~0; | |
3355 | } | |
3356 | ||
bbd9b64e | 3357 | int emulate_instruction(struct kvm_vcpu *vcpu, |
bbd9b64e CO |
3358 | unsigned long cr2, |
3359 | u16 error_code, | |
571008da | 3360 | int emulation_type) |
bbd9b64e | 3361 | { |
310b5d30 | 3362 | int r, shadow_mask; |
571008da | 3363 | struct decode_cache *c; |
851ba692 | 3364 | struct kvm_run *run = vcpu->run; |
bbd9b64e | 3365 | |
26eef70c | 3366 | kvm_clear_exception_queue(vcpu); |
ad312c7c | 3367 | vcpu->arch.mmio_fault_cr2 = cr2; |
5fdbf976 | 3368 | /* |
56e82318 | 3369 | * TODO: fix emulate.c to use guest_read/write_register |
5fdbf976 MT |
3370 | * instead of direct ->regs accesses, can save hundred cycles |
3371 | * on Intel for instructions that don't read/change RSP, for | |
3372 | * for example. | |
3373 | */ | |
3374 | cache_all_regs(vcpu); | |
bbd9b64e CO |
3375 | |
3376 | vcpu->mmio_is_write = 0; | |
ad312c7c | 3377 | vcpu->arch.pio.string = 0; |
bbd9b64e | 3378 | |
571008da | 3379 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
bbd9b64e CO |
3380 | int cs_db, cs_l; |
3381 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
3382 | ||
ad312c7c | 3383 | vcpu->arch.emulate_ctxt.vcpu = vcpu; |
91586a3b | 3384 | vcpu->arch.emulate_ctxt.eflags = kvm_get_rflags(vcpu); |
ad312c7c | 3385 | vcpu->arch.emulate_ctxt.mode = |
a0044755 | 3386 | (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : |
ad312c7c | 3387 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) |
a0044755 | 3388 | ? X86EMUL_MODE_VM86 : cs_l |
bbd9b64e CO |
3389 | ? X86EMUL_MODE_PROT64 : cs_db |
3390 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
3391 | ||
ad312c7c | 3392 | r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
571008da | 3393 | |
0cb5762e AP |
3394 | /* Only allow emulation of specific instructions on #UD |
3395 | * (namely VMMCALL, sysenter, sysexit, syscall)*/ | |
571008da | 3396 | c = &vcpu->arch.emulate_ctxt.decode; |
0cb5762e AP |
3397 | if (emulation_type & EMULTYPE_TRAP_UD) { |
3398 | if (!c->twobyte) | |
3399 | return EMULATE_FAIL; | |
3400 | switch (c->b) { | |
3401 | case 0x01: /* VMMCALL */ | |
3402 | if (c->modrm_mod != 3 || c->modrm_rm != 1) | |
3403 | return EMULATE_FAIL; | |
3404 | break; | |
3405 | case 0x34: /* sysenter */ | |
3406 | case 0x35: /* sysexit */ | |
3407 | if (c->modrm_mod != 0 || c->modrm_rm != 0) | |
3408 | return EMULATE_FAIL; | |
3409 | break; | |
3410 | case 0x05: /* syscall */ | |
3411 | if (c->modrm_mod != 0 || c->modrm_rm != 0) | |
3412 | return EMULATE_FAIL; | |
3413 | break; | |
3414 | default: | |
3415 | return EMULATE_FAIL; | |
3416 | } | |
3417 | ||
3418 | if (!(c->modrm_reg == 0 || c->modrm_reg == 3)) | |
3419 | return EMULATE_FAIL; | |
3420 | } | |
571008da | 3421 | |
f2b5756b | 3422 | ++vcpu->stat.insn_emulation; |
bbd9b64e | 3423 | if (r) { |
f2b5756b | 3424 | ++vcpu->stat.insn_emulation_fail; |
bbd9b64e CO |
3425 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
3426 | return EMULATE_DONE; | |
3427 | return EMULATE_FAIL; | |
3428 | } | |
3429 | } | |
3430 | ||
ba8afb6b GN |
3431 | if (emulation_type & EMULTYPE_SKIP) { |
3432 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.decode.eip); | |
3433 | return EMULATE_DONE; | |
3434 | } | |
3435 | ||
ad312c7c | 3436 | r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
310b5d30 GC |
3437 | shadow_mask = vcpu->arch.emulate_ctxt.interruptibility; |
3438 | ||
3439 | if (r == 0) | |
3440 | kvm_x86_ops->set_interrupt_shadow(vcpu, shadow_mask); | |
bbd9b64e | 3441 | |
ad312c7c | 3442 | if (vcpu->arch.pio.string) |
bbd9b64e CO |
3443 | return EMULATE_DO_MMIO; |
3444 | ||
3445 | if ((r || vcpu->mmio_is_write) && run) { | |
3446 | run->exit_reason = KVM_EXIT_MMIO; | |
3447 | run->mmio.phys_addr = vcpu->mmio_phys_addr; | |
3448 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
3449 | run->mmio.len = vcpu->mmio_size; | |
3450 | run->mmio.is_write = vcpu->mmio_is_write; | |
3451 | } | |
3452 | ||
3453 | if (r) { | |
3454 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) | |
3455 | return EMULATE_DONE; | |
3456 | if (!vcpu->mmio_needed) { | |
3457 | kvm_report_emulation_failure(vcpu, "mmio"); | |
3458 | return EMULATE_FAIL; | |
3459 | } | |
3460 | return EMULATE_DO_MMIO; | |
3461 | } | |
3462 | ||
91586a3b | 3463 | kvm_set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
bbd9b64e CO |
3464 | |
3465 | if (vcpu->mmio_is_write) { | |
3466 | vcpu->mmio_needed = 0; | |
3467 | return EMULATE_DO_MMIO; | |
3468 | } | |
3469 | ||
3470 | return EMULATE_DONE; | |
3471 | } | |
3472 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
3473 | ||
de7d789a CO |
3474 | static int pio_copy_data(struct kvm_vcpu *vcpu) |
3475 | { | |
ad312c7c | 3476 | void *p = vcpu->arch.pio_data; |
0f346074 | 3477 | gva_t q = vcpu->arch.pio.guest_gva; |
de7d789a | 3478 | unsigned bytes; |
0f346074 | 3479 | int ret; |
1871c602 | 3480 | u32 error_code; |
de7d789a | 3481 | |
ad312c7c ZX |
3482 | bytes = vcpu->arch.pio.size * vcpu->arch.pio.cur_count; |
3483 | if (vcpu->arch.pio.in) | |
1871c602 | 3484 | ret = kvm_write_guest_virt(q, p, bytes, vcpu, &error_code); |
de7d789a | 3485 | else |
1871c602 GN |
3486 | ret = kvm_read_guest_virt(q, p, bytes, vcpu, &error_code); |
3487 | ||
3488 | if (ret == X86EMUL_PROPAGATE_FAULT) | |
3489 | kvm_inject_page_fault(vcpu, q, error_code); | |
3490 | ||
0f346074 | 3491 | return ret; |
de7d789a CO |
3492 | } |
3493 | ||
3494 | int complete_pio(struct kvm_vcpu *vcpu) | |
3495 | { | |
ad312c7c | 3496 | struct kvm_pio_request *io = &vcpu->arch.pio; |
de7d789a CO |
3497 | long delta; |
3498 | int r; | |
5fdbf976 | 3499 | unsigned long val; |
de7d789a CO |
3500 | |
3501 | if (!io->string) { | |
5fdbf976 MT |
3502 | if (io->in) { |
3503 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
3504 | memcpy(&val, vcpu->arch.pio_data, io->size); | |
3505 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); | |
3506 | } | |
de7d789a CO |
3507 | } else { |
3508 | if (io->in) { | |
3509 | r = pio_copy_data(vcpu); | |
5fdbf976 | 3510 | if (r) |
1871c602 | 3511 | goto out; |
de7d789a CO |
3512 | } |
3513 | ||
3514 | delta = 1; | |
3515 | if (io->rep) { | |
3516 | delta *= io->cur_count; | |
3517 | /* | |
3518 | * The size of the register should really depend on | |
3519 | * current address size. | |
3520 | */ | |
5fdbf976 MT |
3521 | val = kvm_register_read(vcpu, VCPU_REGS_RCX); |
3522 | val -= delta; | |
3523 | kvm_register_write(vcpu, VCPU_REGS_RCX, val); | |
de7d789a CO |
3524 | } |
3525 | if (io->down) | |
3526 | delta = -delta; | |
3527 | delta *= io->size; | |
5fdbf976 MT |
3528 | if (io->in) { |
3529 | val = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
3530 | val += delta; | |
3531 | kvm_register_write(vcpu, VCPU_REGS_RDI, val); | |
3532 | } else { | |
3533 | val = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
3534 | val += delta; | |
3535 | kvm_register_write(vcpu, VCPU_REGS_RSI, val); | |
3536 | } | |
de7d789a | 3537 | } |
1871c602 | 3538 | out: |
de7d789a CO |
3539 | io->count -= io->cur_count; |
3540 | io->cur_count = 0; | |
3541 | ||
3542 | return 0; | |
3543 | } | |
3544 | ||
bda9020e | 3545 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
de7d789a CO |
3546 | { |
3547 | /* TODO: String I/O for in kernel device */ | |
bda9020e | 3548 | int r; |
de7d789a | 3549 | |
ad312c7c | 3550 | if (vcpu->arch.pio.in) |
e93f8a0f | 3551 | r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port, |
bda9020e | 3552 | vcpu->arch.pio.size, pd); |
de7d789a | 3553 | else |
e93f8a0f MT |
3554 | r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS, |
3555 | vcpu->arch.pio.port, vcpu->arch.pio.size, | |
3556 | pd); | |
bda9020e | 3557 | return r; |
de7d789a CO |
3558 | } |
3559 | ||
bda9020e | 3560 | static int pio_string_write(struct kvm_vcpu *vcpu) |
de7d789a | 3561 | { |
ad312c7c ZX |
3562 | struct kvm_pio_request *io = &vcpu->arch.pio; |
3563 | void *pd = vcpu->arch.pio_data; | |
bda9020e | 3564 | int i, r = 0; |
de7d789a | 3565 | |
de7d789a | 3566 | for (i = 0; i < io->cur_count; i++) { |
e93f8a0f | 3567 | if (kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS, |
bda9020e MT |
3568 | io->port, io->size, pd)) { |
3569 | r = -EOPNOTSUPP; | |
3570 | break; | |
3571 | } | |
de7d789a CO |
3572 | pd += io->size; |
3573 | } | |
bda9020e | 3574 | return r; |
de7d789a CO |
3575 | } |
3576 | ||
851ba692 | 3577 | int kvm_emulate_pio(struct kvm_vcpu *vcpu, int in, int size, unsigned port) |
de7d789a | 3578 | { |
5fdbf976 | 3579 | unsigned long val; |
de7d789a | 3580 | |
f850e2e6 GN |
3581 | trace_kvm_pio(!in, port, size, 1); |
3582 | ||
de7d789a CO |
3583 | vcpu->run->exit_reason = KVM_EXIT_IO; |
3584 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
ad312c7c | 3585 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
de7d789a | 3586 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
ad312c7c ZX |
3587 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = 1; |
3588 | vcpu->run->io.port = vcpu->arch.pio.port = port; | |
3589 | vcpu->arch.pio.in = in; | |
3590 | vcpu->arch.pio.string = 0; | |
3591 | vcpu->arch.pio.down = 0; | |
ad312c7c | 3592 | vcpu->arch.pio.rep = 0; |
de7d789a | 3593 | |
1976d2d2 TY |
3594 | if (!vcpu->arch.pio.in) { |
3595 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
3596 | memcpy(vcpu->arch.pio_data, &val, 4); | |
3597 | } | |
de7d789a | 3598 | |
bda9020e | 3599 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { |
de7d789a CO |
3600 | complete_pio(vcpu); |
3601 | return 1; | |
3602 | } | |
3603 | return 0; | |
3604 | } | |
3605 | EXPORT_SYMBOL_GPL(kvm_emulate_pio); | |
3606 | ||
851ba692 | 3607 | int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, int in, |
de7d789a CO |
3608 | int size, unsigned long count, int down, |
3609 | gva_t address, int rep, unsigned port) | |
3610 | { | |
3611 | unsigned now, in_page; | |
0f346074 | 3612 | int ret = 0; |
de7d789a | 3613 | |
f850e2e6 GN |
3614 | trace_kvm_pio(!in, port, size, count); |
3615 | ||
de7d789a CO |
3616 | vcpu->run->exit_reason = KVM_EXIT_IO; |
3617 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
ad312c7c | 3618 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
de7d789a | 3619 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
ad312c7c ZX |
3620 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = count; |
3621 | vcpu->run->io.port = vcpu->arch.pio.port = port; | |
3622 | vcpu->arch.pio.in = in; | |
3623 | vcpu->arch.pio.string = 1; | |
3624 | vcpu->arch.pio.down = down; | |
ad312c7c | 3625 | vcpu->arch.pio.rep = rep; |
de7d789a CO |
3626 | |
3627 | if (!count) { | |
3628 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
3629 | return 1; | |
3630 | } | |
3631 | ||
3632 | if (!down) | |
3633 | in_page = PAGE_SIZE - offset_in_page(address); | |
3634 | else | |
3635 | in_page = offset_in_page(address) + size; | |
3636 | now = min(count, (unsigned long)in_page / size); | |
0f346074 | 3637 | if (!now) |
de7d789a | 3638 | now = 1; |
de7d789a CO |
3639 | if (down) { |
3640 | /* | |
3641 | * String I/O in reverse. Yuck. Kill the guest, fix later. | |
3642 | */ | |
3643 | pr_unimpl(vcpu, "guest string pio down\n"); | |
c1a5d4f9 | 3644 | kvm_inject_gp(vcpu, 0); |
de7d789a CO |
3645 | return 1; |
3646 | } | |
3647 | vcpu->run->io.count = now; | |
ad312c7c | 3648 | vcpu->arch.pio.cur_count = now; |
de7d789a | 3649 | |
ad312c7c | 3650 | if (vcpu->arch.pio.cur_count == vcpu->arch.pio.count) |
de7d789a CO |
3651 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
3652 | ||
0f346074 | 3653 | vcpu->arch.pio.guest_gva = address; |
de7d789a | 3654 | |
ad312c7c | 3655 | if (!vcpu->arch.pio.in) { |
de7d789a CO |
3656 | /* string PIO write */ |
3657 | ret = pio_copy_data(vcpu); | |
1871c602 | 3658 | if (ret == X86EMUL_PROPAGATE_FAULT) |
0f346074 | 3659 | return 1; |
bda9020e | 3660 | if (ret == 0 && !pio_string_write(vcpu)) { |
de7d789a | 3661 | complete_pio(vcpu); |
ad312c7c | 3662 | if (vcpu->arch.pio.count == 0) |
de7d789a CO |
3663 | ret = 1; |
3664 | } | |
bda9020e MT |
3665 | } |
3666 | /* no string PIO read support yet */ | |
de7d789a CO |
3667 | |
3668 | return ret; | |
3669 | } | |
3670 | EXPORT_SYMBOL_GPL(kvm_emulate_pio_string); | |
3671 | ||
c8076604 GH |
3672 | static void bounce_off(void *info) |
3673 | { | |
3674 | /* nothing */ | |
3675 | } | |
3676 | ||
c8076604 GH |
3677 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
3678 | void *data) | |
3679 | { | |
3680 | struct cpufreq_freqs *freq = data; | |
3681 | struct kvm *kvm; | |
3682 | struct kvm_vcpu *vcpu; | |
3683 | int i, send_ipi = 0; | |
3684 | ||
c8076604 GH |
3685 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
3686 | return 0; | |
3687 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
3688 | return 0; | |
0cca7907 | 3689 | per_cpu(cpu_tsc_khz, freq->cpu) = freq->new; |
c8076604 GH |
3690 | |
3691 | spin_lock(&kvm_lock); | |
3692 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
988a2cae | 3693 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
3694 | if (vcpu->cpu != freq->cpu) |
3695 | continue; | |
3696 | if (!kvm_request_guest_time_update(vcpu)) | |
3697 | continue; | |
3698 | if (vcpu->cpu != smp_processor_id()) | |
3699 | send_ipi++; | |
3700 | } | |
3701 | } | |
3702 | spin_unlock(&kvm_lock); | |
3703 | ||
3704 | if (freq->old < freq->new && send_ipi) { | |
3705 | /* | |
3706 | * We upscale the frequency. Must make the guest | |
3707 | * doesn't see old kvmclock values while running with | |
3708 | * the new frequency, otherwise we risk the guest sees | |
3709 | * time go backwards. | |
3710 | * | |
3711 | * In case we update the frequency for another cpu | |
3712 | * (which might be in guest context) send an interrupt | |
3713 | * to kick the cpu out of guest context. Next time | |
3714 | * guest context is entered kvmclock will be updated, | |
3715 | * so the guest will not see stale values. | |
3716 | */ | |
3717 | smp_call_function_single(freq->cpu, bounce_off, NULL, 1); | |
3718 | } | |
3719 | return 0; | |
3720 | } | |
3721 | ||
3722 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
3723 | .notifier_call = kvmclock_cpufreq_notifier | |
3724 | }; | |
3725 | ||
b820cc0c ZA |
3726 | static void kvm_timer_init(void) |
3727 | { | |
3728 | int cpu; | |
3729 | ||
b820cc0c | 3730 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
b820cc0c ZA |
3731 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
3732 | CPUFREQ_TRANSITION_NOTIFIER); | |
6b7d7e76 ZA |
3733 | for_each_online_cpu(cpu) { |
3734 | unsigned long khz = cpufreq_get(cpu); | |
3735 | if (!khz) | |
3736 | khz = tsc_khz; | |
3737 | per_cpu(cpu_tsc_khz, cpu) = khz; | |
3738 | } | |
0cca7907 ZA |
3739 | } else { |
3740 | for_each_possible_cpu(cpu) | |
3741 | per_cpu(cpu_tsc_khz, cpu) = tsc_khz; | |
b820cc0c ZA |
3742 | } |
3743 | } | |
3744 | ||
f8c16bba | 3745 | int kvm_arch_init(void *opaque) |
043405e1 | 3746 | { |
b820cc0c | 3747 | int r; |
f8c16bba ZX |
3748 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
3749 | ||
f8c16bba ZX |
3750 | if (kvm_x86_ops) { |
3751 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
3752 | r = -EEXIST; |
3753 | goto out; | |
f8c16bba ZX |
3754 | } |
3755 | ||
3756 | if (!ops->cpu_has_kvm_support()) { | |
3757 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
3758 | r = -EOPNOTSUPP; |
3759 | goto out; | |
f8c16bba ZX |
3760 | } |
3761 | if (ops->disabled_by_bios()) { | |
3762 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
3763 | r = -EOPNOTSUPP; |
3764 | goto out; | |
f8c16bba ZX |
3765 | } |
3766 | ||
97db56ce AK |
3767 | r = kvm_mmu_module_init(); |
3768 | if (r) | |
3769 | goto out; | |
3770 | ||
3771 | kvm_init_msr_list(); | |
3772 | ||
f8c16bba | 3773 | kvm_x86_ops = ops; |
56c6d28a | 3774 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
7b52345e SY |
3775 | kvm_mmu_set_base_ptes(PT_PRESENT_MASK); |
3776 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, | |
4b12f0de | 3777 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
c8076604 | 3778 | |
b820cc0c | 3779 | kvm_timer_init(); |
c8076604 | 3780 | |
f8c16bba | 3781 | return 0; |
56c6d28a ZX |
3782 | |
3783 | out: | |
56c6d28a | 3784 | return r; |
043405e1 | 3785 | } |
8776e519 | 3786 | |
f8c16bba ZX |
3787 | void kvm_arch_exit(void) |
3788 | { | |
888d256e JK |
3789 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
3790 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
3791 | CPUFREQ_TRANSITION_NOTIFIER); | |
f8c16bba | 3792 | kvm_x86_ops = NULL; |
56c6d28a ZX |
3793 | kvm_mmu_module_exit(); |
3794 | } | |
f8c16bba | 3795 | |
8776e519 HB |
3796 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
3797 | { | |
3798 | ++vcpu->stat.halt_exits; | |
3799 | if (irqchip_in_kernel(vcpu->kvm)) { | |
a4535290 | 3800 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
3801 | return 1; |
3802 | } else { | |
3803 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
3804 | return 0; | |
3805 | } | |
3806 | } | |
3807 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
3808 | ||
2f333bcb MT |
3809 | static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0, |
3810 | unsigned long a1) | |
3811 | { | |
3812 | if (is_long_mode(vcpu)) | |
3813 | return a0; | |
3814 | else | |
3815 | return a0 | ((gpa_t)a1 << 32); | |
3816 | } | |
3817 | ||
55cd8e5a GN |
3818 | int kvm_hv_hypercall(struct kvm_vcpu *vcpu) |
3819 | { | |
3820 | u64 param, ingpa, outgpa, ret; | |
3821 | uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0; | |
3822 | bool fast, longmode; | |
3823 | int cs_db, cs_l; | |
3824 | ||
3825 | /* | |
3826 | * hypercall generates UD from non zero cpl and real mode | |
3827 | * per HYPER-V spec | |
3828 | */ | |
3eeb3288 | 3829 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) { |
55cd8e5a GN |
3830 | kvm_queue_exception(vcpu, UD_VECTOR); |
3831 | return 0; | |
3832 | } | |
3833 | ||
3834 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
3835 | longmode = is_long_mode(vcpu) && cs_l == 1; | |
3836 | ||
3837 | if (!longmode) { | |
ccd46936 GN |
3838 | param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) | |
3839 | (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff); | |
3840 | ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) | | |
3841 | (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff); | |
3842 | outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) | | |
3843 | (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff); | |
55cd8e5a GN |
3844 | } |
3845 | #ifdef CONFIG_X86_64 | |
3846 | else { | |
3847 | param = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3848 | ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
3849 | outgpa = kvm_register_read(vcpu, VCPU_REGS_R8); | |
3850 | } | |
3851 | #endif | |
3852 | ||
3853 | code = param & 0xffff; | |
3854 | fast = (param >> 16) & 0x1; | |
3855 | rep_cnt = (param >> 32) & 0xfff; | |
3856 | rep_idx = (param >> 48) & 0xfff; | |
3857 | ||
3858 | trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa); | |
3859 | ||
c25bc163 GN |
3860 | switch (code) { |
3861 | case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT: | |
3862 | kvm_vcpu_on_spin(vcpu); | |
3863 | break; | |
3864 | default: | |
3865 | res = HV_STATUS_INVALID_HYPERCALL_CODE; | |
3866 | break; | |
3867 | } | |
55cd8e5a GN |
3868 | |
3869 | ret = res | (((u64)rep_done & 0xfff) << 32); | |
3870 | if (longmode) { | |
3871 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); | |
3872 | } else { | |
3873 | kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32); | |
3874 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff); | |
3875 | } | |
3876 | ||
3877 | return 1; | |
3878 | } | |
3879 | ||
8776e519 HB |
3880 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
3881 | { | |
3882 | unsigned long nr, a0, a1, a2, a3, ret; | |
2f333bcb | 3883 | int r = 1; |
8776e519 | 3884 | |
55cd8e5a GN |
3885 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
3886 | return kvm_hv_hypercall(vcpu); | |
3887 | ||
5fdbf976 MT |
3888 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3889 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
3890 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3891 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
3892 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 3893 | |
229456fc | 3894 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 3895 | |
8776e519 HB |
3896 | if (!is_long_mode(vcpu)) { |
3897 | nr &= 0xFFFFFFFF; | |
3898 | a0 &= 0xFFFFFFFF; | |
3899 | a1 &= 0xFFFFFFFF; | |
3900 | a2 &= 0xFFFFFFFF; | |
3901 | a3 &= 0xFFFFFFFF; | |
3902 | } | |
3903 | ||
07708c4a JK |
3904 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
3905 | ret = -KVM_EPERM; | |
3906 | goto out; | |
3907 | } | |
3908 | ||
8776e519 | 3909 | switch (nr) { |
b93463aa AK |
3910 | case KVM_HC_VAPIC_POLL_IRQ: |
3911 | ret = 0; | |
3912 | break; | |
2f333bcb MT |
3913 | case KVM_HC_MMU_OP: |
3914 | r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret); | |
3915 | break; | |
8776e519 HB |
3916 | default: |
3917 | ret = -KVM_ENOSYS; | |
3918 | break; | |
3919 | } | |
07708c4a | 3920 | out: |
5fdbf976 | 3921 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 3922 | ++vcpu->stat.hypercalls; |
2f333bcb | 3923 | return r; |
8776e519 HB |
3924 | } |
3925 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
3926 | ||
3927 | int kvm_fix_hypercall(struct kvm_vcpu *vcpu) | |
3928 | { | |
3929 | char instruction[3]; | |
5fdbf976 | 3930 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 3931 | |
8776e519 HB |
3932 | /* |
3933 | * Blow out the MMU to ensure that no other VCPU has an active mapping | |
3934 | * to ensure that the updated hypercall appears atomically across all | |
3935 | * VCPUs. | |
3936 | */ | |
3937 | kvm_mmu_zap_all(vcpu->kvm); | |
3938 | ||
8776e519 | 3939 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 3940 | |
7edcface | 3941 | return emulator_write_emulated(rip, instruction, 3, vcpu); |
8776e519 HB |
3942 | } |
3943 | ||
3944 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) | |
3945 | { | |
3946 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
3947 | } | |
3948 | ||
3949 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
3950 | { | |
3951 | struct descriptor_table dt = { limit, base }; | |
3952 | ||
3953 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
3954 | } | |
3955 | ||
3956 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
3957 | { | |
3958 | struct descriptor_table dt = { limit, base }; | |
3959 | ||
3960 | kvm_x86_ops->set_idt(vcpu, &dt); | |
3961 | } | |
3962 | ||
3963 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, | |
3964 | unsigned long *rflags) | |
3965 | { | |
2d3ad1f4 | 3966 | kvm_lmsw(vcpu, msw); |
91586a3b | 3967 | *rflags = kvm_get_rflags(vcpu); |
8776e519 HB |
3968 | } |
3969 | ||
3970 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) | |
3971 | { | |
54e445ca JR |
3972 | unsigned long value; |
3973 | ||
8776e519 HB |
3974 | switch (cr) { |
3975 | case 0: | |
4d4ec087 | 3976 | value = kvm_read_cr0(vcpu); |
54e445ca | 3977 | break; |
8776e519 | 3978 | case 2: |
54e445ca JR |
3979 | value = vcpu->arch.cr2; |
3980 | break; | |
8776e519 | 3981 | case 3: |
54e445ca JR |
3982 | value = vcpu->arch.cr3; |
3983 | break; | |
8776e519 | 3984 | case 4: |
fc78f519 | 3985 | value = kvm_read_cr4(vcpu); |
54e445ca | 3986 | break; |
152ff9be | 3987 | case 8: |
54e445ca JR |
3988 | value = kvm_get_cr8(vcpu); |
3989 | break; | |
8776e519 | 3990 | default: |
b8688d51 | 3991 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
8776e519 HB |
3992 | return 0; |
3993 | } | |
54e445ca JR |
3994 | |
3995 | return value; | |
8776e519 HB |
3996 | } |
3997 | ||
3998 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, | |
3999 | unsigned long *rflags) | |
4000 | { | |
4001 | switch (cr) { | |
4002 | case 0: | |
4d4ec087 | 4003 | kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
91586a3b | 4004 | *rflags = kvm_get_rflags(vcpu); |
8776e519 HB |
4005 | break; |
4006 | case 2: | |
ad312c7c | 4007 | vcpu->arch.cr2 = val; |
8776e519 HB |
4008 | break; |
4009 | case 3: | |
2d3ad1f4 | 4010 | kvm_set_cr3(vcpu, val); |
8776e519 HB |
4011 | break; |
4012 | case 4: | |
fc78f519 | 4013 | kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
8776e519 | 4014 | break; |
152ff9be | 4015 | case 8: |
2d3ad1f4 | 4016 | kvm_set_cr8(vcpu, val & 0xfUL); |
152ff9be | 4017 | break; |
8776e519 | 4018 | default: |
b8688d51 | 4019 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
8776e519 HB |
4020 | } |
4021 | } | |
4022 | ||
07716717 DK |
4023 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
4024 | { | |
ad312c7c ZX |
4025 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
4026 | int j, nent = vcpu->arch.cpuid_nent; | |
07716717 DK |
4027 | |
4028 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; | |
4029 | /* when no next entry is found, the current entry[i] is reselected */ | |
0fdf8e59 | 4030 | for (j = i + 1; ; j = (j + 1) % nent) { |
ad312c7c | 4031 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
07716717 DK |
4032 | if (ej->function == e->function) { |
4033 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; | |
4034 | return j; | |
4035 | } | |
4036 | } | |
4037 | return 0; /* silence gcc, even though control never reaches here */ | |
4038 | } | |
4039 | ||
4040 | /* find an entry with matching function, matching index (if needed), and that | |
4041 | * should be read next (if it's stateful) */ | |
4042 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, | |
4043 | u32 function, u32 index) | |
4044 | { | |
4045 | if (e->function != function) | |
4046 | return 0; | |
4047 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) | |
4048 | return 0; | |
4049 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && | |
19355475 | 4050 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) |
07716717 DK |
4051 | return 0; |
4052 | return 1; | |
4053 | } | |
4054 | ||
d8017474 AG |
4055 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
4056 | u32 function, u32 index) | |
8776e519 HB |
4057 | { |
4058 | int i; | |
d8017474 | 4059 | struct kvm_cpuid_entry2 *best = NULL; |
8776e519 | 4060 | |
ad312c7c | 4061 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
d8017474 AG |
4062 | struct kvm_cpuid_entry2 *e; |
4063 | ||
ad312c7c | 4064 | e = &vcpu->arch.cpuid_entries[i]; |
07716717 DK |
4065 | if (is_matching_cpuid_entry(e, function, index)) { |
4066 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) | |
4067 | move_to_next_stateful_cpuid_entry(vcpu, i); | |
8776e519 HB |
4068 | best = e; |
4069 | break; | |
4070 | } | |
4071 | /* | |
4072 | * Both basic or both extended? | |
4073 | */ | |
4074 | if (((e->function ^ function) & 0x80000000) == 0) | |
4075 | if (!best || e->function > best->function) | |
4076 | best = e; | |
4077 | } | |
d8017474 AG |
4078 | return best; |
4079 | } | |
0e851880 | 4080 | EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry); |
d8017474 | 4081 | |
82725b20 DE |
4082 | int cpuid_maxphyaddr(struct kvm_vcpu *vcpu) |
4083 | { | |
4084 | struct kvm_cpuid_entry2 *best; | |
4085 | ||
4086 | best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0); | |
4087 | if (best) | |
4088 | return best->eax & 0xff; | |
4089 | return 36; | |
4090 | } | |
4091 | ||
d8017474 AG |
4092 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
4093 | { | |
4094 | u32 function, index; | |
4095 | struct kvm_cpuid_entry2 *best; | |
4096 | ||
4097 | function = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
4098 | index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4099 | kvm_register_write(vcpu, VCPU_REGS_RAX, 0); | |
4100 | kvm_register_write(vcpu, VCPU_REGS_RBX, 0); | |
4101 | kvm_register_write(vcpu, VCPU_REGS_RCX, 0); | |
4102 | kvm_register_write(vcpu, VCPU_REGS_RDX, 0); | |
4103 | best = kvm_find_cpuid_entry(vcpu, function, index); | |
8776e519 | 4104 | if (best) { |
5fdbf976 MT |
4105 | kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); |
4106 | kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); | |
4107 | kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); | |
4108 | kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); | |
8776e519 | 4109 | } |
8776e519 | 4110 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
229456fc MT |
4111 | trace_kvm_cpuid(function, |
4112 | kvm_register_read(vcpu, VCPU_REGS_RAX), | |
4113 | kvm_register_read(vcpu, VCPU_REGS_RBX), | |
4114 | kvm_register_read(vcpu, VCPU_REGS_RCX), | |
4115 | kvm_register_read(vcpu, VCPU_REGS_RDX)); | |
8776e519 HB |
4116 | } |
4117 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
d0752060 | 4118 | |
b6c7a5dc HB |
4119 | /* |
4120 | * Check if userspace requested an interrupt window, and that the | |
4121 | * interrupt window is open. | |
4122 | * | |
4123 | * No need to exit to userspace if we already have an interrupt queued. | |
4124 | */ | |
851ba692 | 4125 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 4126 | { |
8061823a | 4127 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
851ba692 | 4128 | vcpu->run->request_interrupt_window && |
5df56646 | 4129 | kvm_arch_interrupt_allowed(vcpu)); |
b6c7a5dc HB |
4130 | } |
4131 | ||
851ba692 | 4132 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 4133 | { |
851ba692 AK |
4134 | struct kvm_run *kvm_run = vcpu->run; |
4135 | ||
91586a3b | 4136 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
2d3ad1f4 | 4137 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 4138 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
4531220b | 4139 | if (irqchip_in_kernel(vcpu->kvm)) |
b6c7a5dc | 4140 | kvm_run->ready_for_interrupt_injection = 1; |
4531220b | 4141 | else |
b6c7a5dc | 4142 | kvm_run->ready_for_interrupt_injection = |
fa9726b0 GN |
4143 | kvm_arch_interrupt_allowed(vcpu) && |
4144 | !kvm_cpu_has_interrupt(vcpu) && | |
4145 | !kvm_event_needs_reinjection(vcpu); | |
b6c7a5dc HB |
4146 | } |
4147 | ||
b93463aa AK |
4148 | static void vapic_enter(struct kvm_vcpu *vcpu) |
4149 | { | |
4150 | struct kvm_lapic *apic = vcpu->arch.apic; | |
4151 | struct page *page; | |
4152 | ||
4153 | if (!apic || !apic->vapic_addr) | |
4154 | return; | |
4155 | ||
4156 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
72dc67a6 IE |
4157 | |
4158 | vcpu->arch.apic->vapic_page = page; | |
b93463aa AK |
4159 | } |
4160 | ||
4161 | static void vapic_exit(struct kvm_vcpu *vcpu) | |
4162 | { | |
4163 | struct kvm_lapic *apic = vcpu->arch.apic; | |
f656ce01 | 4164 | int idx; |
b93463aa AK |
4165 | |
4166 | if (!apic || !apic->vapic_addr) | |
4167 | return; | |
4168 | ||
f656ce01 | 4169 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
b93463aa AK |
4170 | kvm_release_page_dirty(apic->vapic_page); |
4171 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
f656ce01 | 4172 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b93463aa AK |
4173 | } |
4174 | ||
95ba8273 GN |
4175 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
4176 | { | |
4177 | int max_irr, tpr; | |
4178 | ||
4179 | if (!kvm_x86_ops->update_cr8_intercept) | |
4180 | return; | |
4181 | ||
88c808fd AK |
4182 | if (!vcpu->arch.apic) |
4183 | return; | |
4184 | ||
8db3baa2 GN |
4185 | if (!vcpu->arch.apic->vapic_addr) |
4186 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
4187 | else | |
4188 | max_irr = -1; | |
95ba8273 GN |
4189 | |
4190 | if (max_irr != -1) | |
4191 | max_irr >>= 4; | |
4192 | ||
4193 | tpr = kvm_lapic_get_cr8(vcpu); | |
4194 | ||
4195 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
4196 | } | |
4197 | ||
851ba692 | 4198 | static void inject_pending_event(struct kvm_vcpu *vcpu) |
95ba8273 GN |
4199 | { |
4200 | /* try to reinject previous events if any */ | |
b59bb7bd GN |
4201 | if (vcpu->arch.exception.pending) { |
4202 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, | |
4203 | vcpu->arch.exception.has_error_code, | |
4204 | vcpu->arch.exception.error_code); | |
4205 | return; | |
4206 | } | |
4207 | ||
95ba8273 GN |
4208 | if (vcpu->arch.nmi_injected) { |
4209 | kvm_x86_ops->set_nmi(vcpu); | |
4210 | return; | |
4211 | } | |
4212 | ||
4213 | if (vcpu->arch.interrupt.pending) { | |
66fd3f7f | 4214 | kvm_x86_ops->set_irq(vcpu); |
95ba8273 GN |
4215 | return; |
4216 | } | |
4217 | ||
4218 | /* try to inject new event if pending */ | |
4219 | if (vcpu->arch.nmi_pending) { | |
4220 | if (kvm_x86_ops->nmi_allowed(vcpu)) { | |
4221 | vcpu->arch.nmi_pending = false; | |
4222 | vcpu->arch.nmi_injected = true; | |
4223 | kvm_x86_ops->set_nmi(vcpu); | |
4224 | } | |
4225 | } else if (kvm_cpu_has_interrupt(vcpu)) { | |
4226 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { | |
66fd3f7f GN |
4227 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
4228 | false); | |
4229 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
4230 | } |
4231 | } | |
4232 | } | |
4233 | ||
851ba692 | 4234 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
4235 | { |
4236 | int r; | |
6a8b1d13 | 4237 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 4238 | vcpu->run->request_interrupt_window; |
b6c7a5dc | 4239 | |
2e53d63a MT |
4240 | if (vcpu->requests) |
4241 | if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
4242 | kvm_mmu_unload(vcpu); | |
4243 | ||
b6c7a5dc HB |
4244 | r = kvm_mmu_reload(vcpu); |
4245 | if (unlikely(r)) | |
4246 | goto out; | |
4247 | ||
2f52d58c AK |
4248 | if (vcpu->requests) { |
4249 | if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests)) | |
2f599714 | 4250 | __kvm_migrate_timers(vcpu); |
c8076604 GH |
4251 | if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE, &vcpu->requests)) |
4252 | kvm_write_guest_time(vcpu); | |
4731d4c7 MT |
4253 | if (test_and_clear_bit(KVM_REQ_MMU_SYNC, &vcpu->requests)) |
4254 | kvm_mmu_sync_roots(vcpu); | |
d4acf7e7 MT |
4255 | if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) |
4256 | kvm_x86_ops->tlb_flush(vcpu); | |
b93463aa AK |
4257 | if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS, |
4258 | &vcpu->requests)) { | |
851ba692 | 4259 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
4260 | r = 0; |
4261 | goto out; | |
4262 | } | |
71c4dfaf | 4263 | if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests)) { |
851ba692 | 4264 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
71c4dfaf JR |
4265 | r = 0; |
4266 | goto out; | |
4267 | } | |
02daab21 AK |
4268 | if (test_and_clear_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests)) { |
4269 | vcpu->fpu_active = 0; | |
4270 | kvm_x86_ops->fpu_deactivate(vcpu); | |
4271 | } | |
2f52d58c | 4272 | } |
b93463aa | 4273 | |
b6c7a5dc HB |
4274 | preempt_disable(); |
4275 | ||
4276 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2608d7a1 AK |
4277 | if (vcpu->fpu_active) |
4278 | kvm_load_guest_fpu(vcpu); | |
b6c7a5dc HB |
4279 | |
4280 | local_irq_disable(); | |
4281 | ||
32f88400 MT |
4282 | clear_bit(KVM_REQ_KICK, &vcpu->requests); |
4283 | smp_mb__after_clear_bit(); | |
4284 | ||
d7690175 | 4285 | if (vcpu->requests || need_resched() || signal_pending(current)) { |
c7f0f24b | 4286 | set_bit(KVM_REQ_KICK, &vcpu->requests); |
6c142801 AK |
4287 | local_irq_enable(); |
4288 | preempt_enable(); | |
4289 | r = 1; | |
4290 | goto out; | |
4291 | } | |
4292 | ||
851ba692 | 4293 | inject_pending_event(vcpu); |
b6c7a5dc | 4294 | |
6a8b1d13 GN |
4295 | /* enable NMI/IRQ window open exits if needed */ |
4296 | if (vcpu->arch.nmi_pending) | |
4297 | kvm_x86_ops->enable_nmi_window(vcpu); | |
4298 | else if (kvm_cpu_has_interrupt(vcpu) || req_int_win) | |
4299 | kvm_x86_ops->enable_irq_window(vcpu); | |
4300 | ||
95ba8273 | 4301 | if (kvm_lapic_enabled(vcpu)) { |
8db3baa2 GN |
4302 | update_cr8_intercept(vcpu); |
4303 | kvm_lapic_sync_to_vapic(vcpu); | |
95ba8273 | 4304 | } |
b93463aa | 4305 | |
f656ce01 | 4306 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
3200f405 | 4307 | |
b6c7a5dc HB |
4308 | kvm_guest_enter(); |
4309 | ||
42dbaa5a | 4310 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
4311 | set_debugreg(0, 7); |
4312 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
4313 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
4314 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
4315 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
4316 | } | |
b6c7a5dc | 4317 | |
229456fc | 4318 | trace_kvm_entry(vcpu->vcpu_id); |
851ba692 | 4319 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 4320 | |
24f1e32c FW |
4321 | /* |
4322 | * If the guest has used debug registers, at least dr7 | |
4323 | * will be disabled while returning to the host. | |
4324 | * If we don't have active breakpoints in the host, we don't | |
4325 | * care about the messed up debug address registers. But if | |
4326 | * we have some of them active, restore the old state. | |
4327 | */ | |
59d8eb53 | 4328 | if (hw_breakpoint_active()) |
24f1e32c | 4329 | hw_breakpoint_restore(); |
42dbaa5a | 4330 | |
32f88400 | 4331 | set_bit(KVM_REQ_KICK, &vcpu->requests); |
b6c7a5dc HB |
4332 | local_irq_enable(); |
4333 | ||
4334 | ++vcpu->stat.exits; | |
4335 | ||
4336 | /* | |
4337 | * We must have an instruction between local_irq_enable() and | |
4338 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
4339 | * the interrupt shadow. The stat.exits increment will do nicely. | |
4340 | * But we need to prevent reordering, hence this barrier(): | |
4341 | */ | |
4342 | barrier(); | |
4343 | ||
4344 | kvm_guest_exit(); | |
4345 | ||
4346 | preempt_enable(); | |
4347 | ||
f656ce01 | 4348 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 4349 | |
b6c7a5dc HB |
4350 | /* |
4351 | * Profile KVM exit RIPs: | |
4352 | */ | |
4353 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
4354 | unsigned long rip = kvm_rip_read(vcpu); |
4355 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
4356 | } |
4357 | ||
298101da | 4358 | |
b93463aa AK |
4359 | kvm_lapic_sync_from_vapic(vcpu); |
4360 | ||
851ba692 | 4361 | r = kvm_x86_ops->handle_exit(vcpu); |
d7690175 MT |
4362 | out: |
4363 | return r; | |
4364 | } | |
b6c7a5dc | 4365 | |
09cec754 | 4366 | |
851ba692 | 4367 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
4368 | { |
4369 | int r; | |
f656ce01 | 4370 | struct kvm *kvm = vcpu->kvm; |
d7690175 MT |
4371 | |
4372 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { | |
1b10bf31 JK |
4373 | pr_debug("vcpu %d received sipi with vector # %x\n", |
4374 | vcpu->vcpu_id, vcpu->arch.sipi_vector); | |
d7690175 | 4375 | kvm_lapic_reset(vcpu); |
5f179287 | 4376 | r = kvm_arch_vcpu_reset(vcpu); |
d7690175 MT |
4377 | if (r) |
4378 | return r; | |
4379 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
b6c7a5dc HB |
4380 | } |
4381 | ||
f656ce01 | 4382 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 MT |
4383 | vapic_enter(vcpu); |
4384 | ||
4385 | r = 1; | |
4386 | while (r > 0) { | |
af2152f5 | 4387 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) |
851ba692 | 4388 | r = vcpu_enter_guest(vcpu); |
d7690175 | 4389 | else { |
f656ce01 | 4390 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
d7690175 | 4391 | kvm_vcpu_block(vcpu); |
f656ce01 | 4392 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 4393 | if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests)) |
09cec754 GN |
4394 | { |
4395 | switch(vcpu->arch.mp_state) { | |
4396 | case KVM_MP_STATE_HALTED: | |
d7690175 | 4397 | vcpu->arch.mp_state = |
09cec754 GN |
4398 | KVM_MP_STATE_RUNNABLE; |
4399 | case KVM_MP_STATE_RUNNABLE: | |
4400 | break; | |
4401 | case KVM_MP_STATE_SIPI_RECEIVED: | |
4402 | default: | |
4403 | r = -EINTR; | |
4404 | break; | |
4405 | } | |
4406 | } | |
d7690175 MT |
4407 | } |
4408 | ||
09cec754 GN |
4409 | if (r <= 0) |
4410 | break; | |
4411 | ||
4412 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
4413 | if (kvm_cpu_has_pending_timer(vcpu)) | |
4414 | kvm_inject_pending_timer_irqs(vcpu); | |
4415 | ||
851ba692 | 4416 | if (dm_request_for_irq_injection(vcpu)) { |
09cec754 | 4417 | r = -EINTR; |
851ba692 | 4418 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
4419 | ++vcpu->stat.request_irq_exits; |
4420 | } | |
4421 | if (signal_pending(current)) { | |
4422 | r = -EINTR; | |
851ba692 | 4423 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
4424 | ++vcpu->stat.signal_exits; |
4425 | } | |
4426 | if (need_resched()) { | |
f656ce01 | 4427 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
09cec754 | 4428 | kvm_resched(vcpu); |
f656ce01 | 4429 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 4430 | } |
b6c7a5dc HB |
4431 | } |
4432 | ||
f656ce01 | 4433 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
851ba692 | 4434 | post_kvm_run_save(vcpu); |
b6c7a5dc | 4435 | |
b93463aa AK |
4436 | vapic_exit(vcpu); |
4437 | ||
b6c7a5dc HB |
4438 | return r; |
4439 | } | |
4440 | ||
4441 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
4442 | { | |
4443 | int r; | |
4444 | sigset_t sigsaved; | |
4445 | ||
4446 | vcpu_load(vcpu); | |
4447 | ||
ac9f6dc0 AK |
4448 | if (vcpu->sigset_active) |
4449 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
4450 | ||
a4535290 | 4451 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 4452 | kvm_vcpu_block(vcpu); |
d7690175 | 4453 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
4454 | r = -EAGAIN; |
4455 | goto out; | |
b6c7a5dc HB |
4456 | } |
4457 | ||
b6c7a5dc HB |
4458 | /* re-sync apic's tpr */ |
4459 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2d3ad1f4 | 4460 | kvm_set_cr8(vcpu, kvm_run->cr8); |
b6c7a5dc | 4461 | |
ad312c7c | 4462 | if (vcpu->arch.pio.cur_count) { |
7567cae1 | 4463 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
b6c7a5dc | 4464 | r = complete_pio(vcpu); |
7567cae1 | 4465 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc HB |
4466 | if (r) |
4467 | goto out; | |
4468 | } | |
b6c7a5dc HB |
4469 | if (vcpu->mmio_needed) { |
4470 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
4471 | vcpu->mmio_read_completed = 1; | |
4472 | vcpu->mmio_needed = 0; | |
3200f405 | 4473 | |
f656ce01 | 4474 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
851ba692 | 4475 | r = emulate_instruction(vcpu, vcpu->arch.mmio_fault_cr2, 0, |
571008da | 4476 | EMULTYPE_NO_DECODE); |
f656ce01 | 4477 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc HB |
4478 | if (r == EMULATE_DO_MMIO) { |
4479 | /* | |
4480 | * Read-modify-write. Back to userspace. | |
4481 | */ | |
4482 | r = 0; | |
4483 | goto out; | |
4484 | } | |
4485 | } | |
5fdbf976 MT |
4486 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) |
4487 | kvm_register_write(vcpu, VCPU_REGS_RAX, | |
4488 | kvm_run->hypercall.ret); | |
b6c7a5dc | 4489 | |
851ba692 | 4490 | r = __vcpu_run(vcpu); |
b6c7a5dc HB |
4491 | |
4492 | out: | |
4493 | if (vcpu->sigset_active) | |
4494 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
4495 | ||
4496 | vcpu_put(vcpu); | |
4497 | return r; | |
4498 | } | |
4499 | ||
4500 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
4501 | { | |
4502 | vcpu_load(vcpu); | |
4503 | ||
5fdbf976 MT |
4504 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4505 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4506 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4507 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4508 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
4509 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
4510 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4511 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 4512 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
4513 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
4514 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
4515 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
4516 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
4517 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
4518 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
4519 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
4520 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
4521 | #endif |
4522 | ||
5fdbf976 | 4523 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 4524 | regs->rflags = kvm_get_rflags(vcpu); |
b6c7a5dc HB |
4525 | |
4526 | vcpu_put(vcpu); | |
4527 | ||
4528 | return 0; | |
4529 | } | |
4530 | ||
4531 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
4532 | { | |
4533 | vcpu_load(vcpu); | |
4534 | ||
5fdbf976 MT |
4535 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
4536 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
4537 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
4538 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
4539 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
4540 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
4541 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
4542 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 4543 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
4544 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
4545 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
4546 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
4547 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
4548 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
4549 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
4550 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
4551 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
4552 | #endif |
4553 | ||
5fdbf976 | 4554 | kvm_rip_write(vcpu, regs->rip); |
91586a3b | 4555 | kvm_set_rflags(vcpu, regs->rflags); |
b6c7a5dc | 4556 | |
b4f14abd JK |
4557 | vcpu->arch.exception.pending = false; |
4558 | ||
b6c7a5dc HB |
4559 | vcpu_put(vcpu); |
4560 | ||
4561 | return 0; | |
4562 | } | |
4563 | ||
3e6e0aab GT |
4564 | void kvm_get_segment(struct kvm_vcpu *vcpu, |
4565 | struct kvm_segment *var, int seg) | |
b6c7a5dc | 4566 | { |
14af3f3c | 4567 | kvm_x86_ops->get_segment(vcpu, var, seg); |
b6c7a5dc HB |
4568 | } |
4569 | ||
4570 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) | |
4571 | { | |
4572 | struct kvm_segment cs; | |
4573 | ||
3e6e0aab | 4574 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
4575 | *db = cs.db; |
4576 | *l = cs.l; | |
4577 | } | |
4578 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
4579 | ||
4580 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
4581 | struct kvm_sregs *sregs) | |
4582 | { | |
4583 | struct descriptor_table dt; | |
b6c7a5dc HB |
4584 | |
4585 | vcpu_load(vcpu); | |
4586 | ||
3e6e0aab GT |
4587 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
4588 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
4589 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
4590 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
4591 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
4592 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 4593 | |
3e6e0aab GT |
4594 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
4595 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
4596 | |
4597 | kvm_x86_ops->get_idt(vcpu, &dt); | |
4598 | sregs->idt.limit = dt.limit; | |
4599 | sregs->idt.base = dt.base; | |
4600 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
4601 | sregs->gdt.limit = dt.limit; | |
4602 | sregs->gdt.base = dt.base; | |
4603 | ||
4d4ec087 | 4604 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c ZX |
4605 | sregs->cr2 = vcpu->arch.cr2; |
4606 | sregs->cr3 = vcpu->arch.cr3; | |
fc78f519 | 4607 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 4608 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 4609 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
4610 | sregs->apic_base = kvm_get_apic_base(vcpu); |
4611 | ||
923c61bb | 4612 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 4613 | |
36752c9b | 4614 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
4615 | set_bit(vcpu->arch.interrupt.nr, |
4616 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 4617 | |
b6c7a5dc HB |
4618 | vcpu_put(vcpu); |
4619 | ||
4620 | return 0; | |
4621 | } | |
4622 | ||
62d9f0db MT |
4623 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
4624 | struct kvm_mp_state *mp_state) | |
4625 | { | |
4626 | vcpu_load(vcpu); | |
4627 | mp_state->mp_state = vcpu->arch.mp_state; | |
4628 | vcpu_put(vcpu); | |
4629 | return 0; | |
4630 | } | |
4631 | ||
4632 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
4633 | struct kvm_mp_state *mp_state) | |
4634 | { | |
4635 | vcpu_load(vcpu); | |
4636 | vcpu->arch.mp_state = mp_state->mp_state; | |
4637 | vcpu_put(vcpu); | |
4638 | return 0; | |
4639 | } | |
4640 | ||
3e6e0aab | 4641 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
b6c7a5dc HB |
4642 | struct kvm_segment *var, int seg) |
4643 | { | |
14af3f3c | 4644 | kvm_x86_ops->set_segment(vcpu, var, seg); |
b6c7a5dc HB |
4645 | } |
4646 | ||
37817f29 IE |
4647 | static void seg_desct_to_kvm_desct(struct desc_struct *seg_desc, u16 selector, |
4648 | struct kvm_segment *kvm_desct) | |
4649 | { | |
46a359e7 AM |
4650 | kvm_desct->base = get_desc_base(seg_desc); |
4651 | kvm_desct->limit = get_desc_limit(seg_desc); | |
c93cd3a5 MT |
4652 | if (seg_desc->g) { |
4653 | kvm_desct->limit <<= 12; | |
4654 | kvm_desct->limit |= 0xfff; | |
4655 | } | |
37817f29 IE |
4656 | kvm_desct->selector = selector; |
4657 | kvm_desct->type = seg_desc->type; | |
4658 | kvm_desct->present = seg_desc->p; | |
4659 | kvm_desct->dpl = seg_desc->dpl; | |
4660 | kvm_desct->db = seg_desc->d; | |
4661 | kvm_desct->s = seg_desc->s; | |
4662 | kvm_desct->l = seg_desc->l; | |
4663 | kvm_desct->g = seg_desc->g; | |
4664 | kvm_desct->avl = seg_desc->avl; | |
4665 | if (!selector) | |
4666 | kvm_desct->unusable = 1; | |
4667 | else | |
4668 | kvm_desct->unusable = 0; | |
4669 | kvm_desct->padding = 0; | |
4670 | } | |
4671 | ||
b8222ad2 AS |
4672 | static void get_segment_descriptor_dtable(struct kvm_vcpu *vcpu, |
4673 | u16 selector, | |
4674 | struct descriptor_table *dtable) | |
37817f29 IE |
4675 | { |
4676 | if (selector & 1 << 2) { | |
4677 | struct kvm_segment kvm_seg; | |
4678 | ||
3e6e0aab | 4679 | kvm_get_segment(vcpu, &kvm_seg, VCPU_SREG_LDTR); |
37817f29 IE |
4680 | |
4681 | if (kvm_seg.unusable) | |
4682 | dtable->limit = 0; | |
4683 | else | |
4684 | dtable->limit = kvm_seg.limit; | |
4685 | dtable->base = kvm_seg.base; | |
4686 | } | |
4687 | else | |
4688 | kvm_x86_ops->get_gdt(vcpu, dtable); | |
4689 | } | |
4690 | ||
4691 | /* allowed just for 8 bytes segments */ | |
4692 | static int load_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, | |
4693 | struct desc_struct *seg_desc) | |
4694 | { | |
4695 | struct descriptor_table dtable; | |
4696 | u16 index = selector >> 3; | |
6f550484 TY |
4697 | int ret; |
4698 | u32 err; | |
4699 | gva_t addr; | |
37817f29 | 4700 | |
b8222ad2 | 4701 | get_segment_descriptor_dtable(vcpu, selector, &dtable); |
37817f29 IE |
4702 | |
4703 | if (dtable.limit < index * 8 + 7) { | |
4704 | kvm_queue_exception_e(vcpu, GP_VECTOR, selector & 0xfffc); | |
c125c607 | 4705 | return X86EMUL_PROPAGATE_FAULT; |
37817f29 | 4706 | } |
6f550484 TY |
4707 | addr = dtable.base + index * 8; |
4708 | ret = kvm_read_guest_virt_system(addr, seg_desc, sizeof(*seg_desc), | |
4709 | vcpu, &err); | |
4710 | if (ret == X86EMUL_PROPAGATE_FAULT) | |
4711 | kvm_inject_page_fault(vcpu, addr, err); | |
4712 | ||
4713 | return ret; | |
37817f29 IE |
4714 | } |
4715 | ||
4716 | /* allowed just for 8 bytes segments */ | |
4717 | static int save_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, | |
4718 | struct desc_struct *seg_desc) | |
4719 | { | |
4720 | struct descriptor_table dtable; | |
4721 | u16 index = selector >> 3; | |
4722 | ||
b8222ad2 | 4723 | get_segment_descriptor_dtable(vcpu, selector, &dtable); |
37817f29 IE |
4724 | |
4725 | if (dtable.limit < index * 8 + 7) | |
4726 | return 1; | |
1871c602 GN |
4727 | return kvm_write_guest_virt(dtable.base + index*8, seg_desc, sizeof(*seg_desc), vcpu, NULL); |
4728 | } | |
4729 | ||
4730 | static gpa_t get_tss_base_addr_write(struct kvm_vcpu *vcpu, | |
4731 | struct desc_struct *seg_desc) | |
4732 | { | |
4733 | u32 base_addr = get_desc_base(seg_desc); | |
4734 | ||
4735 | return kvm_mmu_gva_to_gpa_write(vcpu, base_addr, NULL); | |
37817f29 IE |
4736 | } |
4737 | ||
1871c602 | 4738 | static gpa_t get_tss_base_addr_read(struct kvm_vcpu *vcpu, |
37817f29 IE |
4739 | struct desc_struct *seg_desc) |
4740 | { | |
46a359e7 | 4741 | u32 base_addr = get_desc_base(seg_desc); |
37817f29 | 4742 | |
1871c602 | 4743 | return kvm_mmu_gva_to_gpa_read(vcpu, base_addr, NULL); |
37817f29 IE |
4744 | } |
4745 | ||
37817f29 IE |
4746 | static u16 get_segment_selector(struct kvm_vcpu *vcpu, int seg) |
4747 | { | |
4748 | struct kvm_segment kvm_seg; | |
4749 | ||
3e6e0aab | 4750 | kvm_get_segment(vcpu, &kvm_seg, seg); |
37817f29 IE |
4751 | return kvm_seg.selector; |
4752 | } | |
4753 | ||
2259e3a7 | 4754 | static int kvm_load_realmode_segment(struct kvm_vcpu *vcpu, u16 selector, int seg) |
f4bbd9aa AK |
4755 | { |
4756 | struct kvm_segment segvar = { | |
4757 | .base = selector << 4, | |
4758 | .limit = 0xffff, | |
4759 | .selector = selector, | |
4760 | .type = 3, | |
4761 | .present = 1, | |
4762 | .dpl = 3, | |
4763 | .db = 0, | |
4764 | .s = 1, | |
4765 | .l = 0, | |
4766 | .g = 0, | |
4767 | .avl = 0, | |
4768 | .unusable = 0, | |
4769 | }; | |
4770 | kvm_x86_ops->set_segment(vcpu, &segvar, seg); | |
c697518a | 4771 | return X86EMUL_CONTINUE; |
f4bbd9aa AK |
4772 | } |
4773 | ||
c0c7c04b AL |
4774 | static int is_vm86_segment(struct kvm_vcpu *vcpu, int seg) |
4775 | { | |
4776 | return (seg != VCPU_SREG_LDTR) && | |
4777 | (seg != VCPU_SREG_TR) && | |
91586a3b | 4778 | (kvm_get_rflags(vcpu) & X86_EFLAGS_VM); |
c0c7c04b AL |
4779 | } |
4780 | ||
c697518a | 4781 | int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg) |
37817f29 IE |
4782 | { |
4783 | struct kvm_segment kvm_seg; | |
e01c2426 | 4784 | struct desc_struct seg_desc; |
c697518a GN |
4785 | u8 dpl, rpl, cpl; |
4786 | unsigned err_vec = GP_VECTOR; | |
4787 | u32 err_code = 0; | |
4788 | bool null_selector = !(selector & ~0x3); /* 0000-0003 are null */ | |
4789 | int ret; | |
37817f29 | 4790 | |
3eeb3288 | 4791 | if (is_vm86_segment(vcpu, seg) || !is_protmode(vcpu)) |
f4bbd9aa | 4792 | return kvm_load_realmode_segment(vcpu, selector, seg); |
e01c2426 | 4793 | |
c697518a GN |
4794 | /* NULL selector is not valid for TR, CS and SS */ |
4795 | if ((seg == VCPU_SREG_CS || seg == VCPU_SREG_SS || seg == VCPU_SREG_TR) | |
4796 | && null_selector) | |
4797 | goto exception; | |
4798 | ||
4799 | /* TR should be in GDT only */ | |
4800 | if (seg == VCPU_SREG_TR && (selector & (1 << 2))) | |
4801 | goto exception; | |
4802 | ||
4803 | ret = load_guest_segment_descriptor(vcpu, selector, &seg_desc); | |
4804 | if (ret) | |
4805 | return ret; | |
4806 | ||
e01c2426 | 4807 | seg_desct_to_kvm_desct(&seg_desc, selector, &kvm_seg); |
cb84b55f | 4808 | |
c697518a GN |
4809 | if (null_selector) { /* for NULL selector skip all following checks */ |
4810 | kvm_seg.unusable = 1; | |
4811 | goto load; | |
4812 | } | |
37817f29 | 4813 | |
c697518a GN |
4814 | err_code = selector & 0xfffc; |
4815 | err_vec = GP_VECTOR; | |
37817f29 | 4816 | |
c697518a GN |
4817 | /* can't load system descriptor into segment selecor */ |
4818 | if (seg <= VCPU_SREG_GS && !kvm_seg.s) | |
4819 | goto exception; | |
4820 | ||
4821 | if (!kvm_seg.present) { | |
4822 | err_vec = (seg == VCPU_SREG_SS) ? SS_VECTOR : NP_VECTOR; | |
4823 | goto exception; | |
4824 | } | |
4825 | ||
4826 | rpl = selector & 3; | |
4827 | dpl = kvm_seg.dpl; | |
4828 | cpl = kvm_x86_ops->get_cpl(vcpu); | |
4829 | ||
4830 | switch (seg) { | |
4831 | case VCPU_SREG_SS: | |
4832 | /* | |
4833 | * segment is not a writable data segment or segment | |
4834 | * selector's RPL != CPL or segment selector's RPL != CPL | |
4835 | */ | |
4836 | if (rpl != cpl || (kvm_seg.type & 0xa) != 0x2 || dpl != cpl) | |
4837 | goto exception; | |
4838 | break; | |
4839 | case VCPU_SREG_CS: | |
4840 | if (!(kvm_seg.type & 8)) | |
4841 | goto exception; | |
4842 | ||
4843 | if (kvm_seg.type & 4) { | |
4844 | /* conforming */ | |
4845 | if (dpl > cpl) | |
4846 | goto exception; | |
4847 | } else { | |
4848 | /* nonconforming */ | |
4849 | if (rpl > cpl || dpl != cpl) | |
4850 | goto exception; | |
4851 | } | |
4852 | /* CS(RPL) <- CPL */ | |
4853 | selector = (selector & 0xfffc) | cpl; | |
4854 | break; | |
4855 | case VCPU_SREG_TR: | |
4856 | if (kvm_seg.s || (kvm_seg.type != 1 && kvm_seg.type != 9)) | |
4857 | goto exception; | |
4858 | break; | |
4859 | case VCPU_SREG_LDTR: | |
4860 | if (kvm_seg.s || kvm_seg.type != 2) | |
4861 | goto exception; | |
4862 | break; | |
4863 | default: /* DS, ES, FS, or GS */ | |
4864 | /* | |
4865 | * segment is not a data or readable code segment or | |
4866 | * ((segment is a data or nonconforming code segment) | |
4867 | * and (both RPL and CPL > DPL)) | |
4868 | */ | |
4869 | if ((kvm_seg.type & 0xa) == 0x8 || | |
4870 | (((kvm_seg.type & 0xc) != 0xc) && (rpl > dpl && cpl > dpl))) | |
4871 | goto exception; | |
4872 | break; | |
4873 | } | |
4874 | ||
4875 | if (!kvm_seg.unusable && kvm_seg.s) { | |
e01c2426 | 4876 | /* mark segment as accessed */ |
c697518a | 4877 | kvm_seg.type |= 1; |
e01c2426 GN |
4878 | seg_desc.type |= 1; |
4879 | save_guest_segment_descriptor(vcpu, selector, &seg_desc); | |
4880 | } | |
c697518a GN |
4881 | load: |
4882 | kvm_set_segment(vcpu, &kvm_seg, seg); | |
4883 | return X86EMUL_CONTINUE; | |
4884 | exception: | |
4885 | kvm_queue_exception_e(vcpu, err_vec, err_code); | |
4886 | return X86EMUL_PROPAGATE_FAULT; | |
37817f29 IE |
4887 | } |
4888 | ||
4889 | static void save_state_to_tss32(struct kvm_vcpu *vcpu, | |
4890 | struct tss_segment_32 *tss) | |
4891 | { | |
4892 | tss->cr3 = vcpu->arch.cr3; | |
5fdbf976 | 4893 | tss->eip = kvm_rip_read(vcpu); |
91586a3b | 4894 | tss->eflags = kvm_get_rflags(vcpu); |
5fdbf976 MT |
4895 | tss->eax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4896 | tss->ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4897 | tss->edx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4898 | tss->ebx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4899 | tss->esp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4900 | tss->ebp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
4901 | tss->esi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
4902 | tss->edi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
37817f29 IE |
4903 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); |
4904 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); | |
4905 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); | |
4906 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); | |
4907 | tss->fs = get_segment_selector(vcpu, VCPU_SREG_FS); | |
4908 | tss->gs = get_segment_selector(vcpu, VCPU_SREG_GS); | |
4909 | tss->ldt_selector = get_segment_selector(vcpu, VCPU_SREG_LDTR); | |
37817f29 IE |
4910 | } |
4911 | ||
c697518a GN |
4912 | static void kvm_load_segment_selector(struct kvm_vcpu *vcpu, u16 sel, int seg) |
4913 | { | |
4914 | struct kvm_segment kvm_seg; | |
4915 | kvm_get_segment(vcpu, &kvm_seg, seg); | |
4916 | kvm_seg.selector = sel; | |
4917 | kvm_set_segment(vcpu, &kvm_seg, seg); | |
4918 | } | |
4919 | ||
37817f29 IE |
4920 | static int load_state_from_tss32(struct kvm_vcpu *vcpu, |
4921 | struct tss_segment_32 *tss) | |
4922 | { | |
4923 | kvm_set_cr3(vcpu, tss->cr3); | |
4924 | ||
5fdbf976 | 4925 | kvm_rip_write(vcpu, tss->eip); |
91586a3b | 4926 | kvm_set_rflags(vcpu, tss->eflags | 2); |
37817f29 | 4927 | |
5fdbf976 MT |
4928 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->eax); |
4929 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->ecx); | |
4930 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->edx); | |
4931 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->ebx); | |
4932 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->esp); | |
4933 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->ebp); | |
4934 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->esi); | |
4935 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->edi); | |
37817f29 | 4936 | |
c697518a GN |
4937 | /* |
4938 | * SDM says that segment selectors are loaded before segment | |
4939 | * descriptors | |
4940 | */ | |
4941 | kvm_load_segment_selector(vcpu, tss->ldt_selector, VCPU_SREG_LDTR); | |
4942 | kvm_load_segment_selector(vcpu, tss->es, VCPU_SREG_ES); | |
4943 | kvm_load_segment_selector(vcpu, tss->cs, VCPU_SREG_CS); | |
4944 | kvm_load_segment_selector(vcpu, tss->ss, VCPU_SREG_SS); | |
4945 | kvm_load_segment_selector(vcpu, tss->ds, VCPU_SREG_DS); | |
4946 | kvm_load_segment_selector(vcpu, tss->fs, VCPU_SREG_FS); | |
4947 | kvm_load_segment_selector(vcpu, tss->gs, VCPU_SREG_GS); | |
4948 | ||
4949 | /* | |
4950 | * Now load segment descriptors. If fault happenes at this stage | |
4951 | * it is handled in a context of new task | |
4952 | */ | |
4953 | if (kvm_load_segment_descriptor(vcpu, tss->ldt_selector, VCPU_SREG_LDTR)) | |
37817f29 IE |
4954 | return 1; |
4955 | ||
c697518a | 4956 | if (kvm_load_segment_descriptor(vcpu, tss->es, VCPU_SREG_ES)) |
37817f29 IE |
4957 | return 1; |
4958 | ||
c697518a | 4959 | if (kvm_load_segment_descriptor(vcpu, tss->cs, VCPU_SREG_CS)) |
37817f29 IE |
4960 | return 1; |
4961 | ||
c697518a | 4962 | if (kvm_load_segment_descriptor(vcpu, tss->ss, VCPU_SREG_SS)) |
37817f29 IE |
4963 | return 1; |
4964 | ||
c697518a | 4965 | if (kvm_load_segment_descriptor(vcpu, tss->ds, VCPU_SREG_DS)) |
37817f29 IE |
4966 | return 1; |
4967 | ||
c697518a | 4968 | if (kvm_load_segment_descriptor(vcpu, tss->fs, VCPU_SREG_FS)) |
37817f29 IE |
4969 | return 1; |
4970 | ||
c697518a | 4971 | if (kvm_load_segment_descriptor(vcpu, tss->gs, VCPU_SREG_GS)) |
37817f29 IE |
4972 | return 1; |
4973 | return 0; | |
4974 | } | |
4975 | ||
4976 | static void save_state_to_tss16(struct kvm_vcpu *vcpu, | |
4977 | struct tss_segment_16 *tss) | |
4978 | { | |
5fdbf976 | 4979 | tss->ip = kvm_rip_read(vcpu); |
91586a3b | 4980 | tss->flag = kvm_get_rflags(vcpu); |
5fdbf976 MT |
4981 | tss->ax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4982 | tss->cx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4983 | tss->dx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4984 | tss->bx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4985 | tss->sp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4986 | tss->bp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
4987 | tss->si = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
4988 | tss->di = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
37817f29 IE |
4989 | |
4990 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); | |
4991 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); | |
4992 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); | |
4993 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); | |
4994 | tss->ldt = get_segment_selector(vcpu, VCPU_SREG_LDTR); | |
37817f29 IE |
4995 | } |
4996 | ||
4997 | static int load_state_from_tss16(struct kvm_vcpu *vcpu, | |
4998 | struct tss_segment_16 *tss) | |
4999 | { | |
5fdbf976 | 5000 | kvm_rip_write(vcpu, tss->ip); |
91586a3b | 5001 | kvm_set_rflags(vcpu, tss->flag | 2); |
5fdbf976 MT |
5002 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->ax); |
5003 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->cx); | |
5004 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->dx); | |
5005 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->bx); | |
5006 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->sp); | |
5007 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->bp); | |
5008 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->si); | |
5009 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->di); | |
37817f29 | 5010 | |
c697518a GN |
5011 | /* |
5012 | * SDM says that segment selectors are loaded before segment | |
5013 | * descriptors | |
5014 | */ | |
5015 | kvm_load_segment_selector(vcpu, tss->ldt, VCPU_SREG_LDTR); | |
5016 | kvm_load_segment_selector(vcpu, tss->es, VCPU_SREG_ES); | |
5017 | kvm_load_segment_selector(vcpu, tss->cs, VCPU_SREG_CS); | |
5018 | kvm_load_segment_selector(vcpu, tss->ss, VCPU_SREG_SS); | |
5019 | kvm_load_segment_selector(vcpu, tss->ds, VCPU_SREG_DS); | |
5020 | ||
5021 | /* | |
5022 | * Now load segment descriptors. If fault happenes at this stage | |
5023 | * it is handled in a context of new task | |
5024 | */ | |
5025 | if (kvm_load_segment_descriptor(vcpu, tss->ldt, VCPU_SREG_LDTR)) | |
37817f29 IE |
5026 | return 1; |
5027 | ||
c697518a | 5028 | if (kvm_load_segment_descriptor(vcpu, tss->es, VCPU_SREG_ES)) |
37817f29 IE |
5029 | return 1; |
5030 | ||
c697518a | 5031 | if (kvm_load_segment_descriptor(vcpu, tss->cs, VCPU_SREG_CS)) |
37817f29 IE |
5032 | return 1; |
5033 | ||
c697518a | 5034 | if (kvm_load_segment_descriptor(vcpu, tss->ss, VCPU_SREG_SS)) |
37817f29 IE |
5035 | return 1; |
5036 | ||
c697518a | 5037 | if (kvm_load_segment_descriptor(vcpu, tss->ds, VCPU_SREG_DS)) |
37817f29 IE |
5038 | return 1; |
5039 | return 0; | |
5040 | } | |
5041 | ||
8b2cf73c | 5042 | static int kvm_task_switch_16(struct kvm_vcpu *vcpu, u16 tss_selector, |
b237ac37 GN |
5043 | u16 old_tss_sel, u32 old_tss_base, |
5044 | struct desc_struct *nseg_desc) | |
37817f29 IE |
5045 | { |
5046 | struct tss_segment_16 tss_segment_16; | |
5047 | int ret = 0; | |
5048 | ||
34198bf8 MT |
5049 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
5050 | sizeof tss_segment_16)) | |
37817f29 IE |
5051 | goto out; |
5052 | ||
5053 | save_state_to_tss16(vcpu, &tss_segment_16); | |
37817f29 | 5054 | |
34198bf8 MT |
5055 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
5056 | sizeof tss_segment_16)) | |
37817f29 | 5057 | goto out; |
34198bf8 | 5058 | |
1871c602 | 5059 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr_read(vcpu, nseg_desc), |
34198bf8 MT |
5060 | &tss_segment_16, sizeof tss_segment_16)) |
5061 | goto out; | |
5062 | ||
b237ac37 GN |
5063 | if (old_tss_sel != 0xffff) { |
5064 | tss_segment_16.prev_task_link = old_tss_sel; | |
5065 | ||
5066 | if (kvm_write_guest(vcpu->kvm, | |
1871c602 | 5067 | get_tss_base_addr_write(vcpu, nseg_desc), |
b237ac37 GN |
5068 | &tss_segment_16.prev_task_link, |
5069 | sizeof tss_segment_16.prev_task_link)) | |
5070 | goto out; | |
5071 | } | |
5072 | ||
37817f29 IE |
5073 | if (load_state_from_tss16(vcpu, &tss_segment_16)) |
5074 | goto out; | |
5075 | ||
5076 | ret = 1; | |
5077 | out: | |
5078 | return ret; | |
5079 | } | |
5080 | ||
8b2cf73c | 5081 | static int kvm_task_switch_32(struct kvm_vcpu *vcpu, u16 tss_selector, |
b237ac37 | 5082 | u16 old_tss_sel, u32 old_tss_base, |
37817f29 IE |
5083 | struct desc_struct *nseg_desc) |
5084 | { | |
5085 | struct tss_segment_32 tss_segment_32; | |
5086 | int ret = 0; | |
5087 | ||
34198bf8 MT |
5088 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
5089 | sizeof tss_segment_32)) | |
37817f29 IE |
5090 | goto out; |
5091 | ||
5092 | save_state_to_tss32(vcpu, &tss_segment_32); | |
37817f29 | 5093 | |
34198bf8 MT |
5094 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
5095 | sizeof tss_segment_32)) | |
5096 | goto out; | |
5097 | ||
1871c602 | 5098 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr_read(vcpu, nseg_desc), |
34198bf8 | 5099 | &tss_segment_32, sizeof tss_segment_32)) |
37817f29 | 5100 | goto out; |
34198bf8 | 5101 | |
b237ac37 GN |
5102 | if (old_tss_sel != 0xffff) { |
5103 | tss_segment_32.prev_task_link = old_tss_sel; | |
5104 | ||
5105 | if (kvm_write_guest(vcpu->kvm, | |
1871c602 | 5106 | get_tss_base_addr_write(vcpu, nseg_desc), |
b237ac37 GN |
5107 | &tss_segment_32.prev_task_link, |
5108 | sizeof tss_segment_32.prev_task_link)) | |
5109 | goto out; | |
5110 | } | |
5111 | ||
37817f29 IE |
5112 | if (load_state_from_tss32(vcpu, &tss_segment_32)) |
5113 | goto out; | |
5114 | ||
5115 | ret = 1; | |
5116 | out: | |
5117 | return ret; | |
5118 | } | |
5119 | ||
5120 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason) | |
5121 | { | |
5122 | struct kvm_segment tr_seg; | |
5123 | struct desc_struct cseg_desc; | |
5124 | struct desc_struct nseg_desc; | |
5125 | int ret = 0; | |
34198bf8 MT |
5126 | u32 old_tss_base = get_segment_base(vcpu, VCPU_SREG_TR); |
5127 | u16 old_tss_sel = get_segment_selector(vcpu, VCPU_SREG_TR); | |
37817f29 | 5128 | |
1871c602 | 5129 | old_tss_base = kvm_mmu_gva_to_gpa_write(vcpu, old_tss_base, NULL); |
37817f29 | 5130 | |
34198bf8 MT |
5131 | /* FIXME: Handle errors. Failure to read either TSS or their |
5132 | * descriptors should generate a pagefault. | |
5133 | */ | |
37817f29 IE |
5134 | if (load_guest_segment_descriptor(vcpu, tss_selector, &nseg_desc)) |
5135 | goto out; | |
5136 | ||
34198bf8 | 5137 | if (load_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc)) |
37817f29 IE |
5138 | goto out; |
5139 | ||
37817f29 IE |
5140 | if (reason != TASK_SWITCH_IRET) { |
5141 | int cpl; | |
5142 | ||
5143 | cpl = kvm_x86_ops->get_cpl(vcpu); | |
5144 | if ((tss_selector & 3) > nseg_desc.dpl || cpl > nseg_desc.dpl) { | |
5145 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
5146 | return 1; | |
5147 | } | |
5148 | } | |
5149 | ||
46a359e7 | 5150 | if (!nseg_desc.p || get_desc_limit(&nseg_desc) < 0x67) { |
37817f29 IE |
5151 | kvm_queue_exception_e(vcpu, TS_VECTOR, tss_selector & 0xfffc); |
5152 | return 1; | |
5153 | } | |
5154 | ||
5155 | if (reason == TASK_SWITCH_IRET || reason == TASK_SWITCH_JMP) { | |
3fe913e7 | 5156 | cseg_desc.type &= ~(1 << 1); //clear the B flag |
34198bf8 | 5157 | save_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc); |
37817f29 IE |
5158 | } |
5159 | ||
5160 | if (reason == TASK_SWITCH_IRET) { | |
91586a3b JK |
5161 | u32 eflags = kvm_get_rflags(vcpu); |
5162 | kvm_set_rflags(vcpu, eflags & ~X86_EFLAGS_NT); | |
37817f29 IE |
5163 | } |
5164 | ||
b237ac37 GN |
5165 | /* set back link to prev task only if NT bit is set in eflags |
5166 | note that old_tss_sel is not used afetr this point */ | |
5167 | if (reason != TASK_SWITCH_CALL && reason != TASK_SWITCH_GATE) | |
5168 | old_tss_sel = 0xffff; | |
5169 | ||
37817f29 | 5170 | if (nseg_desc.type & 8) |
b237ac37 GN |
5171 | ret = kvm_task_switch_32(vcpu, tss_selector, old_tss_sel, |
5172 | old_tss_base, &nseg_desc); | |
37817f29 | 5173 | else |
b237ac37 GN |
5174 | ret = kvm_task_switch_16(vcpu, tss_selector, old_tss_sel, |
5175 | old_tss_base, &nseg_desc); | |
37817f29 IE |
5176 | |
5177 | if (reason == TASK_SWITCH_CALL || reason == TASK_SWITCH_GATE) { | |
91586a3b JK |
5178 | u32 eflags = kvm_get_rflags(vcpu); |
5179 | kvm_set_rflags(vcpu, eflags | X86_EFLAGS_NT); | |
37817f29 IE |
5180 | } |
5181 | ||
5182 | if (reason != TASK_SWITCH_IRET) { | |
3fe913e7 | 5183 | nseg_desc.type |= (1 << 1); |
37817f29 IE |
5184 | save_guest_segment_descriptor(vcpu, tss_selector, |
5185 | &nseg_desc); | |
5186 | } | |
5187 | ||
4d4ec087 | 5188 | kvm_x86_ops->set_cr0(vcpu, kvm_read_cr0(vcpu) | X86_CR0_TS); |
37817f29 IE |
5189 | seg_desct_to_kvm_desct(&nseg_desc, tss_selector, &tr_seg); |
5190 | tr_seg.type = 11; | |
3e6e0aab | 5191 | kvm_set_segment(vcpu, &tr_seg, VCPU_SREG_TR); |
37817f29 | 5192 | out: |
37817f29 IE |
5193 | return ret; |
5194 | } | |
5195 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
5196 | ||
b6c7a5dc HB |
5197 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
5198 | struct kvm_sregs *sregs) | |
5199 | { | |
5200 | int mmu_reset_needed = 0; | |
923c61bb | 5201 | int pending_vec, max_bits; |
b6c7a5dc HB |
5202 | struct descriptor_table dt; |
5203 | ||
5204 | vcpu_load(vcpu); | |
5205 | ||
5206 | dt.limit = sregs->idt.limit; | |
5207 | dt.base = sregs->idt.base; | |
5208 | kvm_x86_ops->set_idt(vcpu, &dt); | |
5209 | dt.limit = sregs->gdt.limit; | |
5210 | dt.base = sregs->gdt.base; | |
5211 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
5212 | ||
ad312c7c ZX |
5213 | vcpu->arch.cr2 = sregs->cr2; |
5214 | mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3; | |
dc7e795e | 5215 | vcpu->arch.cr3 = sregs->cr3; |
b6c7a5dc | 5216 | |
2d3ad1f4 | 5217 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 5218 | |
f6801dff | 5219 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 5220 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc HB |
5221 | kvm_set_apic_base(vcpu, sregs->apic_base); |
5222 | ||
4d4ec087 | 5223 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 5224 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 5225 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 5226 | |
fc78f519 | 5227 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 5228 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
7c93be44 | 5229 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
ad312c7c | 5230 | load_pdptrs(vcpu, vcpu->arch.cr3); |
7c93be44 MT |
5231 | mmu_reset_needed = 1; |
5232 | } | |
b6c7a5dc HB |
5233 | |
5234 | if (mmu_reset_needed) | |
5235 | kvm_mmu_reset_context(vcpu); | |
5236 | ||
923c61bb GN |
5237 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; |
5238 | pending_vec = find_first_bit( | |
5239 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
5240 | if (pending_vec < max_bits) { | |
66fd3f7f | 5241 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb GN |
5242 | pr_debug("Set back pending irq %d\n", pending_vec); |
5243 | if (irqchip_in_kernel(vcpu->kvm)) | |
5244 | kvm_pic_clear_isr_ack(vcpu->kvm); | |
b6c7a5dc HB |
5245 | } |
5246 | ||
3e6e0aab GT |
5247 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
5248 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
5249 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
5250 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
5251 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
5252 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 5253 | |
3e6e0aab GT |
5254 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
5255 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 5256 | |
5f0269f5 ME |
5257 | update_cr8_intercept(vcpu); |
5258 | ||
9c3e4aab | 5259 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 5260 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 5261 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 5262 | !is_protmode(vcpu)) |
9c3e4aab MT |
5263 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
5264 | ||
b6c7a5dc HB |
5265 | vcpu_put(vcpu); |
5266 | ||
5267 | return 0; | |
5268 | } | |
5269 | ||
d0bfb940 JK |
5270 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
5271 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 5272 | { |
355be0b9 | 5273 | unsigned long rflags; |
ae675ef0 | 5274 | int i, r; |
b6c7a5dc HB |
5275 | |
5276 | vcpu_load(vcpu); | |
5277 | ||
4f926bf2 JK |
5278 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
5279 | r = -EBUSY; | |
5280 | if (vcpu->arch.exception.pending) | |
5281 | goto unlock_out; | |
5282 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) | |
5283 | kvm_queue_exception(vcpu, DB_VECTOR); | |
5284 | else | |
5285 | kvm_queue_exception(vcpu, BP_VECTOR); | |
5286 | } | |
5287 | ||
91586a3b JK |
5288 | /* |
5289 | * Read rflags as long as potentially injected trace flags are still | |
5290 | * filtered out. | |
5291 | */ | |
5292 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
5293 | |
5294 | vcpu->guest_debug = dbg->control; | |
5295 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
5296 | vcpu->guest_debug = 0; | |
5297 | ||
5298 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
5299 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
5300 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
5301 | vcpu->arch.switch_db_regs = | |
5302 | (dbg->arch.debugreg[7] & DR7_BP_EN_MASK); | |
5303 | } else { | |
5304 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
5305 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
5306 | vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK); | |
5307 | } | |
5308 | ||
94fe45da JK |
5309 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) { |
5310 | vcpu->arch.singlestep_cs = | |
5311 | get_segment_selector(vcpu, VCPU_SREG_CS); | |
5312 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu); | |
5313 | } | |
5314 | ||
91586a3b JK |
5315 | /* |
5316 | * Trigger an rflags update that will inject or remove the trace | |
5317 | * flags. | |
5318 | */ | |
5319 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 5320 | |
355be0b9 | 5321 | kvm_x86_ops->set_guest_debug(vcpu, dbg); |
b6c7a5dc | 5322 | |
4f926bf2 | 5323 | r = 0; |
d0bfb940 | 5324 | |
4f926bf2 | 5325 | unlock_out: |
b6c7a5dc HB |
5326 | vcpu_put(vcpu); |
5327 | ||
5328 | return r; | |
5329 | } | |
5330 | ||
d0752060 HB |
5331 | /* |
5332 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when | |
5333 | * we have asm/x86/processor.h | |
5334 | */ | |
5335 | struct fxsave { | |
5336 | u16 cwd; | |
5337 | u16 swd; | |
5338 | u16 twd; | |
5339 | u16 fop; | |
5340 | u64 rip; | |
5341 | u64 rdp; | |
5342 | u32 mxcsr; | |
5343 | u32 mxcsr_mask; | |
5344 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
5345 | #ifdef CONFIG_X86_64 | |
5346 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ | |
5347 | #else | |
5348 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
5349 | #endif | |
5350 | }; | |
5351 | ||
8b006791 ZX |
5352 | /* |
5353 | * Translate a guest virtual address to a guest physical address. | |
5354 | */ | |
5355 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
5356 | struct kvm_translation *tr) | |
5357 | { | |
5358 | unsigned long vaddr = tr->linear_address; | |
5359 | gpa_t gpa; | |
f656ce01 | 5360 | int idx; |
8b006791 ZX |
5361 | |
5362 | vcpu_load(vcpu); | |
f656ce01 | 5363 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 5364 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 5365 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
5366 | tr->physical_address = gpa; |
5367 | tr->valid = gpa != UNMAPPED_GVA; | |
5368 | tr->writeable = 1; | |
5369 | tr->usermode = 0; | |
8b006791 ZX |
5370 | vcpu_put(vcpu); |
5371 | ||
5372 | return 0; | |
5373 | } | |
5374 | ||
d0752060 HB |
5375 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
5376 | { | |
ad312c7c | 5377 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
5378 | |
5379 | vcpu_load(vcpu); | |
5380 | ||
5381 | memcpy(fpu->fpr, fxsave->st_space, 128); | |
5382 | fpu->fcw = fxsave->cwd; | |
5383 | fpu->fsw = fxsave->swd; | |
5384 | fpu->ftwx = fxsave->twd; | |
5385 | fpu->last_opcode = fxsave->fop; | |
5386 | fpu->last_ip = fxsave->rip; | |
5387 | fpu->last_dp = fxsave->rdp; | |
5388 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
5389 | ||
5390 | vcpu_put(vcpu); | |
5391 | ||
5392 | return 0; | |
5393 | } | |
5394 | ||
5395 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
5396 | { | |
ad312c7c | 5397 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
5398 | |
5399 | vcpu_load(vcpu); | |
5400 | ||
5401 | memcpy(fxsave->st_space, fpu->fpr, 128); | |
5402 | fxsave->cwd = fpu->fcw; | |
5403 | fxsave->swd = fpu->fsw; | |
5404 | fxsave->twd = fpu->ftwx; | |
5405 | fxsave->fop = fpu->last_opcode; | |
5406 | fxsave->rip = fpu->last_ip; | |
5407 | fxsave->rdp = fpu->last_dp; | |
5408 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
5409 | ||
5410 | vcpu_put(vcpu); | |
5411 | ||
5412 | return 0; | |
5413 | } | |
5414 | ||
5415 | void fx_init(struct kvm_vcpu *vcpu) | |
5416 | { | |
5417 | unsigned after_mxcsr_mask; | |
5418 | ||
bc1a34f1 AA |
5419 | /* |
5420 | * Touch the fpu the first time in non atomic context as if | |
5421 | * this is the first fpu instruction the exception handler | |
5422 | * will fire before the instruction returns and it'll have to | |
5423 | * allocate ram with GFP_KERNEL. | |
5424 | */ | |
5425 | if (!used_math()) | |
d6e88aec | 5426 | kvm_fx_save(&vcpu->arch.host_fx_image); |
bc1a34f1 | 5427 | |
d0752060 HB |
5428 | /* Initialize guest FPU by resetting ours and saving into guest's */ |
5429 | preempt_disable(); | |
d6e88aec AK |
5430 | kvm_fx_save(&vcpu->arch.host_fx_image); |
5431 | kvm_fx_finit(); | |
5432 | kvm_fx_save(&vcpu->arch.guest_fx_image); | |
5433 | kvm_fx_restore(&vcpu->arch.host_fx_image); | |
d0752060 HB |
5434 | preempt_enable(); |
5435 | ||
ad312c7c | 5436 | vcpu->arch.cr0 |= X86_CR0_ET; |
d0752060 | 5437 | after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space); |
ad312c7c ZX |
5438 | vcpu->arch.guest_fx_image.mxcsr = 0x1f80; |
5439 | memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask, | |
d0752060 HB |
5440 | 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask); |
5441 | } | |
5442 | EXPORT_SYMBOL_GPL(fx_init); | |
5443 | ||
5444 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) | |
5445 | { | |
2608d7a1 | 5446 | if (vcpu->guest_fpu_loaded) |
d0752060 HB |
5447 | return; |
5448 | ||
5449 | vcpu->guest_fpu_loaded = 1; | |
d6e88aec AK |
5450 | kvm_fx_save(&vcpu->arch.host_fx_image); |
5451 | kvm_fx_restore(&vcpu->arch.guest_fx_image); | |
0c04851c | 5452 | trace_kvm_fpu(1); |
d0752060 | 5453 | } |
d0752060 HB |
5454 | |
5455 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
5456 | { | |
5457 | if (!vcpu->guest_fpu_loaded) | |
5458 | return; | |
5459 | ||
5460 | vcpu->guest_fpu_loaded = 0; | |
d6e88aec AK |
5461 | kvm_fx_save(&vcpu->arch.guest_fx_image); |
5462 | kvm_fx_restore(&vcpu->arch.host_fx_image); | |
f096ed85 | 5463 | ++vcpu->stat.fpu_reload; |
02daab21 | 5464 | set_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests); |
0c04851c | 5465 | trace_kvm_fpu(0); |
d0752060 | 5466 | } |
e9b11c17 ZX |
5467 | |
5468 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
5469 | { | |
7f1ea208 JR |
5470 | if (vcpu->arch.time_page) { |
5471 | kvm_release_page_dirty(vcpu->arch.time_page); | |
5472 | vcpu->arch.time_page = NULL; | |
5473 | } | |
5474 | ||
e9b11c17 ZX |
5475 | kvm_x86_ops->vcpu_free(vcpu); |
5476 | } | |
5477 | ||
5478 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
5479 | unsigned int id) | |
5480 | { | |
26e5215f AK |
5481 | return kvm_x86_ops->vcpu_create(kvm, id); |
5482 | } | |
e9b11c17 | 5483 | |
26e5215f AK |
5484 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
5485 | { | |
5486 | int r; | |
e9b11c17 ZX |
5487 | |
5488 | /* We do fxsave: this must be aligned. */ | |
ad312c7c | 5489 | BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF); |
e9b11c17 | 5490 | |
0bed3b56 | 5491 | vcpu->arch.mtrr_state.have_fixed = 1; |
e9b11c17 ZX |
5492 | vcpu_load(vcpu); |
5493 | r = kvm_arch_vcpu_reset(vcpu); | |
5494 | if (r == 0) | |
5495 | r = kvm_mmu_setup(vcpu); | |
5496 | vcpu_put(vcpu); | |
5497 | if (r < 0) | |
5498 | goto free_vcpu; | |
5499 | ||
26e5215f | 5500 | return 0; |
e9b11c17 ZX |
5501 | free_vcpu: |
5502 | kvm_x86_ops->vcpu_free(vcpu); | |
26e5215f | 5503 | return r; |
e9b11c17 ZX |
5504 | } |
5505 | ||
d40ccc62 | 5506 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 ZX |
5507 | { |
5508 | vcpu_load(vcpu); | |
5509 | kvm_mmu_unload(vcpu); | |
5510 | vcpu_put(vcpu); | |
5511 | ||
5512 | kvm_x86_ops->vcpu_free(vcpu); | |
5513 | } | |
5514 | ||
5515 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) | |
5516 | { | |
448fa4a9 JK |
5517 | vcpu->arch.nmi_pending = false; |
5518 | vcpu->arch.nmi_injected = false; | |
5519 | ||
42dbaa5a JK |
5520 | vcpu->arch.switch_db_regs = 0; |
5521 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); | |
5522 | vcpu->arch.dr6 = DR6_FIXED_1; | |
5523 | vcpu->arch.dr7 = DR7_FIXED_1; | |
5524 | ||
e9b11c17 ZX |
5525 | return kvm_x86_ops->vcpu_reset(vcpu); |
5526 | } | |
5527 | ||
10474ae8 | 5528 | int kvm_arch_hardware_enable(void *garbage) |
e9b11c17 | 5529 | { |
0cca7907 ZA |
5530 | /* |
5531 | * Since this may be called from a hotplug notifcation, | |
5532 | * we can't get the CPU frequency directly. | |
5533 | */ | |
5534 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { | |
5535 | int cpu = raw_smp_processor_id(); | |
5536 | per_cpu(cpu_tsc_khz, cpu) = 0; | |
5537 | } | |
18863bdd AK |
5538 | |
5539 | kvm_shared_msr_cpu_online(); | |
5540 | ||
10474ae8 | 5541 | return kvm_x86_ops->hardware_enable(garbage); |
e9b11c17 ZX |
5542 | } |
5543 | ||
5544 | void kvm_arch_hardware_disable(void *garbage) | |
5545 | { | |
5546 | kvm_x86_ops->hardware_disable(garbage); | |
3548bab5 | 5547 | drop_user_return_notifiers(garbage); |
e9b11c17 ZX |
5548 | } |
5549 | ||
5550 | int kvm_arch_hardware_setup(void) | |
5551 | { | |
5552 | return kvm_x86_ops->hardware_setup(); | |
5553 | } | |
5554 | ||
5555 | void kvm_arch_hardware_unsetup(void) | |
5556 | { | |
5557 | kvm_x86_ops->hardware_unsetup(); | |
5558 | } | |
5559 | ||
5560 | void kvm_arch_check_processor_compat(void *rtn) | |
5561 | { | |
5562 | kvm_x86_ops->check_processor_compatibility(rtn); | |
5563 | } | |
5564 | ||
5565 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
5566 | { | |
5567 | struct page *page; | |
5568 | struct kvm *kvm; | |
5569 | int r; | |
5570 | ||
5571 | BUG_ON(vcpu->kvm == NULL); | |
5572 | kvm = vcpu->kvm; | |
5573 | ||
ad312c7c | 5574 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
c5af89b6 | 5575 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) |
a4535290 | 5576 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 5577 | else |
a4535290 | 5578 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
5579 | |
5580 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
5581 | if (!page) { | |
5582 | r = -ENOMEM; | |
5583 | goto fail; | |
5584 | } | |
ad312c7c | 5585 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 ZX |
5586 | |
5587 | r = kvm_mmu_create(vcpu); | |
5588 | if (r < 0) | |
5589 | goto fail_free_pio_data; | |
5590 | ||
5591 | if (irqchip_in_kernel(kvm)) { | |
5592 | r = kvm_create_lapic(vcpu); | |
5593 | if (r < 0) | |
5594 | goto fail_mmu_destroy; | |
5595 | } | |
5596 | ||
890ca9ae HY |
5597 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
5598 | GFP_KERNEL); | |
5599 | if (!vcpu->arch.mce_banks) { | |
5600 | r = -ENOMEM; | |
443c39bc | 5601 | goto fail_free_lapic; |
890ca9ae HY |
5602 | } |
5603 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
5604 | ||
e9b11c17 | 5605 | return 0; |
443c39bc WY |
5606 | fail_free_lapic: |
5607 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
5608 | fail_mmu_destroy: |
5609 | kvm_mmu_destroy(vcpu); | |
5610 | fail_free_pio_data: | |
ad312c7c | 5611 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
5612 | fail: |
5613 | return r; | |
5614 | } | |
5615 | ||
5616 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
5617 | { | |
f656ce01 MT |
5618 | int idx; |
5619 | ||
36cb93fd | 5620 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 5621 | kvm_free_lapic(vcpu); |
f656ce01 | 5622 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 5623 | kvm_mmu_destroy(vcpu); |
f656ce01 | 5624 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 5625 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 | 5626 | } |
d19a9cd2 ZX |
5627 | |
5628 | struct kvm *kvm_arch_create_vm(void) | |
5629 | { | |
5630 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
5631 | ||
5632 | if (!kvm) | |
5633 | return ERR_PTR(-ENOMEM); | |
5634 | ||
fef9cce0 MT |
5635 | kvm->arch.aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL); |
5636 | if (!kvm->arch.aliases) { | |
5637 | kfree(kvm); | |
5638 | return ERR_PTR(-ENOMEM); | |
5639 | } | |
5640 | ||
f05e70ac | 5641 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
4d5c5d0f | 5642 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
d19a9cd2 | 5643 | |
5550af4d SY |
5644 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
5645 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
5646 | ||
53f658b3 MT |
5647 | rdtscll(kvm->arch.vm_init_tsc); |
5648 | ||
d19a9cd2 ZX |
5649 | return kvm; |
5650 | } | |
5651 | ||
5652 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
5653 | { | |
5654 | vcpu_load(vcpu); | |
5655 | kvm_mmu_unload(vcpu); | |
5656 | vcpu_put(vcpu); | |
5657 | } | |
5658 | ||
5659 | static void kvm_free_vcpus(struct kvm *kvm) | |
5660 | { | |
5661 | unsigned int i; | |
988a2cae | 5662 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
5663 | |
5664 | /* | |
5665 | * Unpin any mmu pages first. | |
5666 | */ | |
988a2cae GN |
5667 | kvm_for_each_vcpu(i, vcpu, kvm) |
5668 | kvm_unload_vcpu_mmu(vcpu); | |
5669 | kvm_for_each_vcpu(i, vcpu, kvm) | |
5670 | kvm_arch_vcpu_free(vcpu); | |
5671 | ||
5672 | mutex_lock(&kvm->lock); | |
5673 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
5674 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 5675 | |
988a2cae GN |
5676 | atomic_set(&kvm->online_vcpus, 0); |
5677 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
5678 | } |
5679 | ||
ad8ba2cd SY |
5680 | void kvm_arch_sync_events(struct kvm *kvm) |
5681 | { | |
ba4cef31 | 5682 | kvm_free_all_assigned_devices(kvm); |
ad8ba2cd SY |
5683 | } |
5684 | ||
d19a9cd2 ZX |
5685 | void kvm_arch_destroy_vm(struct kvm *kvm) |
5686 | { | |
6eb55818 | 5687 | kvm_iommu_unmap_guest(kvm); |
7837699f | 5688 | kvm_free_pit(kvm); |
d7deeeb0 ZX |
5689 | kfree(kvm->arch.vpic); |
5690 | kfree(kvm->arch.vioapic); | |
d19a9cd2 ZX |
5691 | kvm_free_vcpus(kvm); |
5692 | kvm_free_physmem(kvm); | |
3d45830c AK |
5693 | if (kvm->arch.apic_access_page) |
5694 | put_page(kvm->arch.apic_access_page); | |
b7ebfb05 SY |
5695 | if (kvm->arch.ept_identity_pagetable) |
5696 | put_page(kvm->arch.ept_identity_pagetable); | |
64749204 | 5697 | cleanup_srcu_struct(&kvm->srcu); |
fef9cce0 | 5698 | kfree(kvm->arch.aliases); |
d19a9cd2 ZX |
5699 | kfree(kvm); |
5700 | } | |
0de10343 | 5701 | |
f7784b8e MT |
5702 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
5703 | struct kvm_memory_slot *memslot, | |
0de10343 | 5704 | struct kvm_memory_slot old, |
f7784b8e | 5705 | struct kvm_userspace_memory_region *mem, |
0de10343 ZX |
5706 | int user_alloc) |
5707 | { | |
f7784b8e | 5708 | int npages = memslot->npages; |
0de10343 ZX |
5709 | |
5710 | /*To keep backward compatibility with older userspace, | |
5711 | *x86 needs to hanlde !user_alloc case. | |
5712 | */ | |
5713 | if (!user_alloc) { | |
5714 | if (npages && !old.rmap) { | |
604b38ac AA |
5715 | unsigned long userspace_addr; |
5716 | ||
72dc67a6 | 5717 | down_write(¤t->mm->mmap_sem); |
604b38ac AA |
5718 | userspace_addr = do_mmap(NULL, 0, |
5719 | npages * PAGE_SIZE, | |
5720 | PROT_READ | PROT_WRITE, | |
acee3c04 | 5721 | MAP_PRIVATE | MAP_ANONYMOUS, |
604b38ac | 5722 | 0); |
72dc67a6 | 5723 | up_write(¤t->mm->mmap_sem); |
0de10343 | 5724 | |
604b38ac AA |
5725 | if (IS_ERR((void *)userspace_addr)) |
5726 | return PTR_ERR((void *)userspace_addr); | |
5727 | ||
604b38ac | 5728 | memslot->userspace_addr = userspace_addr; |
0de10343 ZX |
5729 | } |
5730 | } | |
5731 | ||
f7784b8e MT |
5732 | |
5733 | return 0; | |
5734 | } | |
5735 | ||
5736 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
5737 | struct kvm_userspace_memory_region *mem, | |
5738 | struct kvm_memory_slot old, | |
5739 | int user_alloc) | |
5740 | { | |
5741 | ||
5742 | int npages = mem->memory_size >> PAGE_SHIFT; | |
5743 | ||
5744 | if (!user_alloc && !old.user_alloc && old.rmap && !npages) { | |
5745 | int ret; | |
5746 | ||
5747 | down_write(¤t->mm->mmap_sem); | |
5748 | ret = do_munmap(current->mm, old.userspace_addr, | |
5749 | old.npages * PAGE_SIZE); | |
5750 | up_write(¤t->mm->mmap_sem); | |
5751 | if (ret < 0) | |
5752 | printk(KERN_WARNING | |
5753 | "kvm_vm_ioctl_set_memory_region: " | |
5754 | "failed to munmap memory\n"); | |
5755 | } | |
5756 | ||
7c8a83b7 | 5757 | spin_lock(&kvm->mmu_lock); |
f05e70ac | 5758 | if (!kvm->arch.n_requested_mmu_pages) { |
0de10343 ZX |
5759 | unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); |
5760 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); | |
5761 | } | |
5762 | ||
5763 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); | |
7c8a83b7 | 5764 | spin_unlock(&kvm->mmu_lock); |
0de10343 | 5765 | } |
1d737c8a | 5766 | |
34d4cb8f MT |
5767 | void kvm_arch_flush_shadow(struct kvm *kvm) |
5768 | { | |
5769 | kvm_mmu_zap_all(kvm); | |
8986ecc0 | 5770 | kvm_reload_remote_mmus(kvm); |
34d4cb8f MT |
5771 | } |
5772 | ||
1d737c8a ZX |
5773 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
5774 | { | |
a4535290 | 5775 | return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE |
a1b37100 GN |
5776 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED |
5777 | || vcpu->arch.nmi_pending || | |
5778 | (kvm_arch_interrupt_allowed(vcpu) && | |
5779 | kvm_cpu_has_interrupt(vcpu)); | |
1d737c8a | 5780 | } |
5736199a | 5781 | |
5736199a ZX |
5782 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
5783 | { | |
32f88400 MT |
5784 | int me; |
5785 | int cpu = vcpu->cpu; | |
5736199a ZX |
5786 | |
5787 | if (waitqueue_active(&vcpu->wq)) { | |
5788 | wake_up_interruptible(&vcpu->wq); | |
5789 | ++vcpu->stat.halt_wakeup; | |
5790 | } | |
32f88400 MT |
5791 | |
5792 | me = get_cpu(); | |
5793 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) | |
5794 | if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests)) | |
5795 | smp_send_reschedule(cpu); | |
e9571ed5 | 5796 | put_cpu(); |
5736199a | 5797 | } |
78646121 GN |
5798 | |
5799 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
5800 | { | |
5801 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
5802 | } | |
229456fc | 5803 | |
94fe45da JK |
5804 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
5805 | { | |
5806 | unsigned long rflags; | |
5807 | ||
5808 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
5809 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
5810 | rflags &= ~(unsigned long)(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
5811 | return rflags; | |
5812 | } | |
5813 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
5814 | ||
5815 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
5816 | { | |
5817 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
5818 | vcpu->arch.singlestep_cs == | |
5819 | get_segment_selector(vcpu, VCPU_SREG_CS) && | |
5820 | vcpu->arch.singlestep_rip == kvm_rip_read(vcpu)) | |
5821 | rflags |= X86_EFLAGS_TF | X86_EFLAGS_RF; | |
5822 | kvm_x86_ops->set_rflags(vcpu, rflags); | |
5823 | } | |
5824 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
5825 | ||
229456fc MT |
5826 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
5827 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); | |
5828 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
5829 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
5830 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 5831 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 5832 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 5833 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 5834 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 5835 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 5836 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |