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043405e1 CO |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * derived from drivers/kvm/kvm_main.c | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
4d5c5d0f BAY |
7 | * Copyright (C) 2008 Qumranet, Inc. |
8 | * Copyright IBM Corporation, 2008 | |
9611c187 | 9 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
043405e1 CO |
10 | * |
11 | * Authors: | |
12 | * Avi Kivity <avi@qumranet.com> | |
13 | * Yaniv Kamay <yaniv@qumranet.com> | |
4d5c5d0f BAY |
14 | * Amit Shah <amit.shah@qumranet.com> |
15 | * Ben-Ami Yassour <benami@il.ibm.com> | |
043405e1 CO |
16 | * |
17 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
18 | * the COPYING file in the top-level directory. | |
19 | * | |
20 | */ | |
21 | ||
edf88417 | 22 | #include <linux/kvm_host.h> |
313a3dc7 | 23 | #include "irq.h" |
1d737c8a | 24 | #include "mmu.h" |
7837699f | 25 | #include "i8254.h" |
37817f29 | 26 | #include "tss.h" |
5fdbf976 | 27 | #include "kvm_cache_regs.h" |
26eef70c | 28 | #include "x86.h" |
00b27a3e | 29 | #include "cpuid.h" |
313a3dc7 | 30 | |
18068523 | 31 | #include <linux/clocksource.h> |
4d5c5d0f | 32 | #include <linux/interrupt.h> |
313a3dc7 CO |
33 | #include <linux/kvm.h> |
34 | #include <linux/fs.h> | |
35 | #include <linux/vmalloc.h> | |
5fb76f9b | 36 | #include <linux/module.h> |
0de10343 | 37 | #include <linux/mman.h> |
2bacc55c | 38 | #include <linux/highmem.h> |
19de40a8 | 39 | #include <linux/iommu.h> |
62c476c7 | 40 | #include <linux/intel-iommu.h> |
c8076604 | 41 | #include <linux/cpufreq.h> |
18863bdd | 42 | #include <linux/user-return-notifier.h> |
a983fb23 | 43 | #include <linux/srcu.h> |
5a0e3ad6 | 44 | #include <linux/slab.h> |
ff9d07a0 | 45 | #include <linux/perf_event.h> |
7bee342a | 46 | #include <linux/uaccess.h> |
af585b92 | 47 | #include <linux/hash.h> |
a1b60c1c | 48 | #include <linux/pci.h> |
16e8d74d MT |
49 | #include <linux/timekeeper_internal.h> |
50 | #include <linux/pvclock_gtod.h> | |
aec51dc4 | 51 | #include <trace/events/kvm.h> |
2ed152af | 52 | |
229456fc MT |
53 | #define CREATE_TRACE_POINTS |
54 | #include "trace.h" | |
043405e1 | 55 | |
24f1e32c | 56 | #include <asm/debugreg.h> |
d825ed0a | 57 | #include <asm/msr.h> |
a5f61300 | 58 | #include <asm/desc.h> |
0bed3b56 | 59 | #include <asm/mtrr.h> |
890ca9ae | 60 | #include <asm/mce.h> |
7cf30855 | 61 | #include <asm/i387.h> |
1361b83a | 62 | #include <asm/fpu-internal.h> /* Ugh! */ |
98918833 | 63 | #include <asm/xcr.h> |
1d5f066e | 64 | #include <asm/pvclock.h> |
217fc9cf | 65 | #include <asm/div64.h> |
043405e1 | 66 | |
313a3dc7 | 67 | #define MAX_IO_MSRS 256 |
890ca9ae | 68 | #define KVM_MAX_MCE_BANKS 32 |
5854dbca | 69 | #define KVM_MCE_CAP_SUPPORTED (MCG_CTL_P | MCG_SER_P) |
890ca9ae | 70 | |
0f65dd70 AK |
71 | #define emul_to_vcpu(ctxt) \ |
72 | container_of(ctxt, struct kvm_vcpu, arch.emulate_ctxt) | |
73 | ||
50a37eb4 JR |
74 | /* EFER defaults: |
75 | * - enable syscall per default because its emulated by KVM | |
76 | * - enable LME and LMA per default on 64 bit KVM | |
77 | */ | |
78 | #ifdef CONFIG_X86_64 | |
1260edbe LJ |
79 | static |
80 | u64 __read_mostly efer_reserved_bits = ~((u64)(EFER_SCE | EFER_LME | EFER_LMA)); | |
50a37eb4 | 81 | #else |
1260edbe | 82 | static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE); |
50a37eb4 | 83 | #endif |
313a3dc7 | 84 | |
ba1389b7 AK |
85 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
86 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 87 | |
cb142eb7 | 88 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
7460fb4a | 89 | static void process_nmi(struct kvm_vcpu *vcpu); |
674eea0f | 90 | |
97896d04 | 91 | struct kvm_x86_ops *kvm_x86_ops; |
5fdbf976 | 92 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 93 | |
476bc001 RR |
94 | static bool ignore_msrs = 0; |
95 | module_param(ignore_msrs, bool, S_IRUGO | S_IWUSR); | |
ed85c068 | 96 | |
9ed96e87 MT |
97 | unsigned int min_timer_period_us = 500; |
98 | module_param(min_timer_period_us, uint, S_IRUGO | S_IWUSR); | |
99 | ||
92a1f12d JR |
100 | bool kvm_has_tsc_control; |
101 | EXPORT_SYMBOL_GPL(kvm_has_tsc_control); | |
102 | u32 kvm_max_guest_tsc_khz; | |
103 | EXPORT_SYMBOL_GPL(kvm_max_guest_tsc_khz); | |
104 | ||
cc578287 ZA |
105 | /* tsc tolerance in parts per million - default to 1/2 of the NTP threshold */ |
106 | static u32 tsc_tolerance_ppm = 250; | |
107 | module_param(tsc_tolerance_ppm, uint, S_IRUGO | S_IWUSR); | |
108 | ||
18863bdd AK |
109 | #define KVM_NR_SHARED_MSRS 16 |
110 | ||
111 | struct kvm_shared_msrs_global { | |
112 | int nr; | |
2bf78fa7 | 113 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
114 | }; |
115 | ||
116 | struct kvm_shared_msrs { | |
117 | struct user_return_notifier urn; | |
118 | bool registered; | |
2bf78fa7 SY |
119 | struct kvm_shared_msr_values { |
120 | u64 host; | |
121 | u64 curr; | |
122 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
123 | }; |
124 | ||
125 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
013f6a5d | 126 | static struct kvm_shared_msrs __percpu *shared_msrs; |
18863bdd | 127 | |
417bc304 | 128 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
129 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
130 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
131 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
132 | { "invlpg", VCPU_STAT(invlpg) }, | |
133 | { "exits", VCPU_STAT(exits) }, | |
134 | { "io_exits", VCPU_STAT(io_exits) }, | |
135 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
136 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
137 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 138 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 AK |
139 | { "halt_exits", VCPU_STAT(halt_exits) }, |
140 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, | |
f11c3a8d | 141 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
142 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
143 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
144 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
145 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
146 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
147 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
148 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 149 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 150 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
151 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
152 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
153 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
154 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
155 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
156 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 157 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 158 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 159 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 160 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
161 | { NULL } |
162 | }; | |
163 | ||
2acf923e DC |
164 | u64 __read_mostly host_xcr0; |
165 | ||
b6785def | 166 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt); |
d6aa1000 | 167 | |
af585b92 GN |
168 | static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu) |
169 | { | |
170 | int i; | |
171 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU); i++) | |
172 | vcpu->arch.apf.gfns[i] = ~0; | |
173 | } | |
174 | ||
18863bdd AK |
175 | static void kvm_on_user_return(struct user_return_notifier *urn) |
176 | { | |
177 | unsigned slot; | |
18863bdd AK |
178 | struct kvm_shared_msrs *locals |
179 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 180 | struct kvm_shared_msr_values *values; |
18863bdd AK |
181 | |
182 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { | |
2bf78fa7 SY |
183 | values = &locals->values[slot]; |
184 | if (values->host != values->curr) { | |
185 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
186 | values->curr = values->host; | |
18863bdd AK |
187 | } |
188 | } | |
189 | locals->registered = false; | |
190 | user_return_notifier_unregister(urn); | |
191 | } | |
192 | ||
2bf78fa7 | 193 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 194 | { |
18863bdd | 195 | u64 value; |
013f6a5d MT |
196 | unsigned int cpu = smp_processor_id(); |
197 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
18863bdd | 198 | |
2bf78fa7 SY |
199 | /* only read, and nobody should modify it at this time, |
200 | * so don't need lock */ | |
201 | if (slot >= shared_msrs_global.nr) { | |
202 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
203 | return; | |
204 | } | |
205 | rdmsrl_safe(msr, &value); | |
206 | smsr->values[slot].host = value; | |
207 | smsr->values[slot].curr = value; | |
208 | } | |
209 | ||
210 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
211 | { | |
18863bdd AK |
212 | if (slot >= shared_msrs_global.nr) |
213 | shared_msrs_global.nr = slot + 1; | |
2bf78fa7 SY |
214 | shared_msrs_global.msrs[slot] = msr; |
215 | /* we need ensured the shared_msr_global have been updated */ | |
216 | smp_wmb(); | |
18863bdd AK |
217 | } |
218 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
219 | ||
220 | static void kvm_shared_msr_cpu_online(void) | |
221 | { | |
222 | unsigned i; | |
18863bdd AK |
223 | |
224 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 225 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
226 | } |
227 | ||
d5696725 | 228 | void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd | 229 | { |
013f6a5d MT |
230 | unsigned int cpu = smp_processor_id(); |
231 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
18863bdd | 232 | |
2bf78fa7 | 233 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
18863bdd | 234 | return; |
2bf78fa7 SY |
235 | smsr->values[slot].curr = value; |
236 | wrmsrl(shared_msrs_global.msrs[slot], value); | |
18863bdd AK |
237 | if (!smsr->registered) { |
238 | smsr->urn.on_user_return = kvm_on_user_return; | |
239 | user_return_notifier_register(&smsr->urn); | |
240 | smsr->registered = true; | |
241 | } | |
242 | } | |
243 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
244 | ||
3548bab5 AK |
245 | static void drop_user_return_notifiers(void *ignore) |
246 | { | |
013f6a5d MT |
247 | unsigned int cpu = smp_processor_id(); |
248 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
3548bab5 AK |
249 | |
250 | if (smsr->registered) | |
251 | kvm_on_user_return(&smsr->urn); | |
252 | } | |
253 | ||
6866b83e CO |
254 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
255 | { | |
8a5a87d9 | 256 | return vcpu->arch.apic_base; |
6866b83e CO |
257 | } |
258 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
259 | ||
58cb628d JK |
260 | int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
261 | { | |
262 | u64 old_state = vcpu->arch.apic_base & | |
263 | (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); | |
264 | u64 new_state = msr_info->data & | |
265 | (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); | |
266 | u64 reserved_bits = ((~0ULL) << cpuid_maxphyaddr(vcpu)) | | |
267 | 0x2ff | (guest_cpuid_has_x2apic(vcpu) ? 0 : X2APIC_ENABLE); | |
268 | ||
269 | if (!msr_info->host_initiated && | |
270 | ((msr_info->data & reserved_bits) != 0 || | |
271 | new_state == X2APIC_ENABLE || | |
272 | (new_state == MSR_IA32_APICBASE_ENABLE && | |
273 | old_state == (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE)) || | |
274 | (new_state == (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE) && | |
275 | old_state == 0))) | |
276 | return 1; | |
277 | ||
278 | kvm_lapic_set_base(vcpu, msr_info->data); | |
279 | return 0; | |
6866b83e CO |
280 | } |
281 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
282 | ||
e3ba45b8 GL |
283 | asmlinkage void kvm_spurious_fault(void) |
284 | { | |
285 | /* Fault while not rebooting. We want the trace. */ | |
286 | BUG(); | |
287 | } | |
288 | EXPORT_SYMBOL_GPL(kvm_spurious_fault); | |
289 | ||
3fd28fce ED |
290 | #define EXCPT_BENIGN 0 |
291 | #define EXCPT_CONTRIBUTORY 1 | |
292 | #define EXCPT_PF 2 | |
293 | ||
294 | static int exception_class(int vector) | |
295 | { | |
296 | switch (vector) { | |
297 | case PF_VECTOR: | |
298 | return EXCPT_PF; | |
299 | case DE_VECTOR: | |
300 | case TS_VECTOR: | |
301 | case NP_VECTOR: | |
302 | case SS_VECTOR: | |
303 | case GP_VECTOR: | |
304 | return EXCPT_CONTRIBUTORY; | |
305 | default: | |
306 | break; | |
307 | } | |
308 | return EXCPT_BENIGN; | |
309 | } | |
310 | ||
311 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, | |
ce7ddec4 JR |
312 | unsigned nr, bool has_error, u32 error_code, |
313 | bool reinject) | |
3fd28fce ED |
314 | { |
315 | u32 prev_nr; | |
316 | int class1, class2; | |
317 | ||
3842d135 AK |
318 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
319 | ||
3fd28fce ED |
320 | if (!vcpu->arch.exception.pending) { |
321 | queue: | |
322 | vcpu->arch.exception.pending = true; | |
323 | vcpu->arch.exception.has_error_code = has_error; | |
324 | vcpu->arch.exception.nr = nr; | |
325 | vcpu->arch.exception.error_code = error_code; | |
3f0fd292 | 326 | vcpu->arch.exception.reinject = reinject; |
3fd28fce ED |
327 | return; |
328 | } | |
329 | ||
330 | /* to check exception */ | |
331 | prev_nr = vcpu->arch.exception.nr; | |
332 | if (prev_nr == DF_VECTOR) { | |
333 | /* triple fault -> shutdown */ | |
a8eeb04a | 334 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
3fd28fce ED |
335 | return; |
336 | } | |
337 | class1 = exception_class(prev_nr); | |
338 | class2 = exception_class(nr); | |
339 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
340 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
341 | /* generate double fault per SDM Table 5-5 */ | |
342 | vcpu->arch.exception.pending = true; | |
343 | vcpu->arch.exception.has_error_code = true; | |
344 | vcpu->arch.exception.nr = DF_VECTOR; | |
345 | vcpu->arch.exception.error_code = 0; | |
346 | } else | |
347 | /* replace previous exception with a new one in a hope | |
348 | that instruction re-execution will regenerate lost | |
349 | exception */ | |
350 | goto queue; | |
351 | } | |
352 | ||
298101da AK |
353 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
354 | { | |
ce7ddec4 | 355 | kvm_multiple_exception(vcpu, nr, false, 0, false); |
298101da AK |
356 | } |
357 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
358 | ||
ce7ddec4 JR |
359 | void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
360 | { | |
361 | kvm_multiple_exception(vcpu, nr, false, 0, true); | |
362 | } | |
363 | EXPORT_SYMBOL_GPL(kvm_requeue_exception); | |
364 | ||
db8fcefa | 365 | void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err) |
c3c91fee | 366 | { |
db8fcefa AP |
367 | if (err) |
368 | kvm_inject_gp(vcpu, 0); | |
369 | else | |
370 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
371 | } | |
372 | EXPORT_SYMBOL_GPL(kvm_complete_insn_gp); | |
8df25a32 | 373 | |
6389ee94 | 374 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
c3c91fee AK |
375 | { |
376 | ++vcpu->stat.pf_guest; | |
6389ee94 AK |
377 | vcpu->arch.cr2 = fault->address; |
378 | kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code); | |
c3c91fee | 379 | } |
27d6c865 | 380 | EXPORT_SYMBOL_GPL(kvm_inject_page_fault); |
c3c91fee | 381 | |
6389ee94 | 382 | void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
d4f8cf66 | 383 | { |
6389ee94 AK |
384 | if (mmu_is_nested(vcpu) && !fault->nested_page_fault) |
385 | vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault); | |
d4f8cf66 | 386 | else |
6389ee94 | 387 | vcpu->arch.mmu.inject_page_fault(vcpu, fault); |
d4f8cf66 JR |
388 | } |
389 | ||
3419ffc8 SY |
390 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
391 | { | |
7460fb4a AK |
392 | atomic_inc(&vcpu->arch.nmi_queued); |
393 | kvm_make_request(KVM_REQ_NMI, vcpu); | |
3419ffc8 SY |
394 | } |
395 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
396 | ||
298101da AK |
397 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
398 | { | |
ce7ddec4 | 399 | kvm_multiple_exception(vcpu, nr, true, error_code, false); |
298101da AK |
400 | } |
401 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
402 | ||
ce7ddec4 JR |
403 | void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
404 | { | |
405 | kvm_multiple_exception(vcpu, nr, true, error_code, true); | |
406 | } | |
407 | EXPORT_SYMBOL_GPL(kvm_requeue_exception_e); | |
408 | ||
0a79b009 AK |
409 | /* |
410 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
411 | * a #GP and return false. | |
412 | */ | |
413 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 414 | { |
0a79b009 AK |
415 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
416 | return true; | |
417 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
418 | return false; | |
298101da | 419 | } |
0a79b009 | 420 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 421 | |
ec92fe44 JR |
422 | /* |
423 | * This function will be used to read from the physical memory of the currently | |
424 | * running guest. The difference to kvm_read_guest_page is that this function | |
425 | * can read from guest physical or from the guest's guest physical memory. | |
426 | */ | |
427 | int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, | |
428 | gfn_t ngfn, void *data, int offset, int len, | |
429 | u32 access) | |
430 | { | |
431 | gfn_t real_gfn; | |
432 | gpa_t ngpa; | |
433 | ||
434 | ngpa = gfn_to_gpa(ngfn); | |
435 | real_gfn = mmu->translate_gpa(vcpu, ngpa, access); | |
436 | if (real_gfn == UNMAPPED_GVA) | |
437 | return -EFAULT; | |
438 | ||
439 | real_gfn = gpa_to_gfn(real_gfn); | |
440 | ||
441 | return kvm_read_guest_page(vcpu->kvm, real_gfn, data, offset, len); | |
442 | } | |
443 | EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu); | |
444 | ||
3d06b8bf JR |
445 | int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, |
446 | void *data, int offset, int len, u32 access) | |
447 | { | |
448 | return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn, | |
449 | data, offset, len, access); | |
450 | } | |
451 | ||
a03490ed CO |
452 | /* |
453 | * Load the pae pdptrs. Return true is they are all valid. | |
454 | */ | |
ff03a073 | 455 | int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3) |
a03490ed CO |
456 | { |
457 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
458 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
459 | int i; | |
460 | int ret; | |
ff03a073 | 461 | u64 pdpte[ARRAY_SIZE(mmu->pdptrs)]; |
a03490ed | 462 | |
ff03a073 JR |
463 | ret = kvm_read_guest_page_mmu(vcpu, mmu, pdpt_gfn, pdpte, |
464 | offset * sizeof(u64), sizeof(pdpte), | |
465 | PFERR_USER_MASK|PFERR_WRITE_MASK); | |
a03490ed CO |
466 | if (ret < 0) { |
467 | ret = 0; | |
468 | goto out; | |
469 | } | |
470 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
43a3795a | 471 | if (is_present_gpte(pdpte[i]) && |
20c466b5 | 472 | (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) { |
a03490ed CO |
473 | ret = 0; |
474 | goto out; | |
475 | } | |
476 | } | |
477 | ret = 1; | |
478 | ||
ff03a073 | 479 | memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs)); |
6de4f3ad AK |
480 | __set_bit(VCPU_EXREG_PDPTR, |
481 | (unsigned long *)&vcpu->arch.regs_avail); | |
482 | __set_bit(VCPU_EXREG_PDPTR, | |
483 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 484 | out: |
a03490ed CO |
485 | |
486 | return ret; | |
487 | } | |
cc4b6871 | 488 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 489 | |
d835dfec AK |
490 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
491 | { | |
ff03a073 | 492 | u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)]; |
d835dfec | 493 | bool changed = true; |
3d06b8bf JR |
494 | int offset; |
495 | gfn_t gfn; | |
d835dfec AK |
496 | int r; |
497 | ||
498 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
499 | return false; | |
500 | ||
6de4f3ad AK |
501 | if (!test_bit(VCPU_EXREG_PDPTR, |
502 | (unsigned long *)&vcpu->arch.regs_avail)) | |
503 | return true; | |
504 | ||
9f8fe504 AK |
505 | gfn = (kvm_read_cr3(vcpu) & ~31u) >> PAGE_SHIFT; |
506 | offset = (kvm_read_cr3(vcpu) & ~31u) & (PAGE_SIZE - 1); | |
3d06b8bf JR |
507 | r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte), |
508 | PFERR_USER_MASK | PFERR_WRITE_MASK); | |
d835dfec AK |
509 | if (r < 0) |
510 | goto out; | |
ff03a073 | 511 | changed = memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 512 | out: |
d835dfec AK |
513 | |
514 | return changed; | |
515 | } | |
516 | ||
49a9b07e | 517 | int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed | 518 | { |
aad82703 SY |
519 | unsigned long old_cr0 = kvm_read_cr0(vcpu); |
520 | unsigned long update_bits = X86_CR0_PG | X86_CR0_WP | | |
521 | X86_CR0_CD | X86_CR0_NW; | |
522 | ||
f9a48e6a AK |
523 | cr0 |= X86_CR0_ET; |
524 | ||
ab344828 | 525 | #ifdef CONFIG_X86_64 |
0f12244f GN |
526 | if (cr0 & 0xffffffff00000000UL) |
527 | return 1; | |
ab344828 GN |
528 | #endif |
529 | ||
530 | cr0 &= ~CR0_RESERVED_BITS; | |
a03490ed | 531 | |
0f12244f GN |
532 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) |
533 | return 1; | |
a03490ed | 534 | |
0f12244f GN |
535 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) |
536 | return 1; | |
a03490ed CO |
537 | |
538 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
539 | #ifdef CONFIG_X86_64 | |
f6801dff | 540 | if ((vcpu->arch.efer & EFER_LME)) { |
a03490ed CO |
541 | int cs_db, cs_l; |
542 | ||
0f12244f GN |
543 | if (!is_pae(vcpu)) |
544 | return 1; | |
a03490ed | 545 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
0f12244f GN |
546 | if (cs_l) |
547 | return 1; | |
a03490ed CO |
548 | } else |
549 | #endif | |
ff03a073 | 550 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
9f8fe504 | 551 | kvm_read_cr3(vcpu))) |
0f12244f | 552 | return 1; |
a03490ed CO |
553 | } |
554 | ||
ad756a16 MJ |
555 | if (!(cr0 & X86_CR0_PG) && kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE)) |
556 | return 1; | |
557 | ||
a03490ed | 558 | kvm_x86_ops->set_cr0(vcpu, cr0); |
a03490ed | 559 | |
d170c419 | 560 | if ((cr0 ^ old_cr0) & X86_CR0_PG) { |
e5f3f027 | 561 | kvm_clear_async_pf_completion_queue(vcpu); |
d170c419 LJ |
562 | kvm_async_pf_hash_reset(vcpu); |
563 | } | |
e5f3f027 | 564 | |
aad82703 SY |
565 | if ((cr0 ^ old_cr0) & update_bits) |
566 | kvm_mmu_reset_context(vcpu); | |
0f12244f GN |
567 | return 0; |
568 | } | |
2d3ad1f4 | 569 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 570 | |
2d3ad1f4 | 571 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 572 | { |
49a9b07e | 573 | (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f)); |
a03490ed | 574 | } |
2d3ad1f4 | 575 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 576 | |
42bdf991 MT |
577 | static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu) |
578 | { | |
579 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) && | |
580 | !vcpu->guest_xcr0_loaded) { | |
581 | /* kvm_set_xcr() also depends on this */ | |
582 | xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0); | |
583 | vcpu->guest_xcr0_loaded = 1; | |
584 | } | |
585 | } | |
586 | ||
587 | static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu) | |
588 | { | |
589 | if (vcpu->guest_xcr0_loaded) { | |
590 | if (vcpu->arch.xcr0 != host_xcr0) | |
591 | xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0); | |
592 | vcpu->guest_xcr0_loaded = 0; | |
593 | } | |
594 | } | |
595 | ||
2acf923e DC |
596 | int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) |
597 | { | |
598 | u64 xcr0; | |
46c34cb0 | 599 | u64 valid_bits; |
2acf923e DC |
600 | |
601 | /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */ | |
602 | if (index != XCR_XFEATURE_ENABLED_MASK) | |
603 | return 1; | |
604 | xcr0 = xcr; | |
2acf923e DC |
605 | if (!(xcr0 & XSTATE_FP)) |
606 | return 1; | |
607 | if ((xcr0 & XSTATE_YMM) && !(xcr0 & XSTATE_SSE)) | |
608 | return 1; | |
46c34cb0 PB |
609 | |
610 | /* | |
611 | * Do not allow the guest to set bits that we do not support | |
612 | * saving. However, xcr0 bit 0 is always set, even if the | |
613 | * emulated CPU does not support XSAVE (see fx_init). | |
614 | */ | |
615 | valid_bits = vcpu->arch.guest_supported_xcr0 | XSTATE_FP; | |
616 | if (xcr0 & ~valid_bits) | |
2acf923e | 617 | return 1; |
46c34cb0 | 618 | |
42bdf991 | 619 | kvm_put_guest_xcr0(vcpu); |
2acf923e | 620 | vcpu->arch.xcr0 = xcr0; |
2acf923e DC |
621 | return 0; |
622 | } | |
623 | ||
624 | int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) | |
625 | { | |
764bcbc5 Z |
626 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || |
627 | __kvm_set_xcr(vcpu, index, xcr)) { | |
2acf923e DC |
628 | kvm_inject_gp(vcpu, 0); |
629 | return 1; | |
630 | } | |
631 | return 0; | |
632 | } | |
633 | EXPORT_SYMBOL_GPL(kvm_set_xcr); | |
634 | ||
a83b29c6 | 635 | int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 636 | { |
fc78f519 | 637 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
c68b734f YW |
638 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | |
639 | X86_CR4_PAE | X86_CR4_SMEP; | |
0f12244f GN |
640 | if (cr4 & CR4_RESERVED_BITS) |
641 | return 1; | |
a03490ed | 642 | |
2acf923e DC |
643 | if (!guest_cpuid_has_xsave(vcpu) && (cr4 & X86_CR4_OSXSAVE)) |
644 | return 1; | |
645 | ||
c68b734f YW |
646 | if (!guest_cpuid_has_smep(vcpu) && (cr4 & X86_CR4_SMEP)) |
647 | return 1; | |
648 | ||
afcbf13f | 649 | if (!guest_cpuid_has_fsgsbase(vcpu) && (cr4 & X86_CR4_FSGSBASE)) |
74dc2b4f YW |
650 | return 1; |
651 | ||
a03490ed | 652 | if (is_long_mode(vcpu)) { |
0f12244f GN |
653 | if (!(cr4 & X86_CR4_PAE)) |
654 | return 1; | |
a2edf57f AK |
655 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
656 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
9f8fe504 AK |
657 | && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
658 | kvm_read_cr3(vcpu))) | |
0f12244f GN |
659 | return 1; |
660 | ||
ad756a16 MJ |
661 | if ((cr4 & X86_CR4_PCIDE) && !(old_cr4 & X86_CR4_PCIDE)) { |
662 | if (!guest_cpuid_has_pcid(vcpu)) | |
663 | return 1; | |
664 | ||
665 | /* PCID can not be enabled when cr3[11:0]!=000H or EFER.LMA=0 */ | |
666 | if ((kvm_read_cr3(vcpu) & X86_CR3_PCID_MASK) || !is_long_mode(vcpu)) | |
667 | return 1; | |
668 | } | |
669 | ||
5e1746d6 | 670 | if (kvm_x86_ops->set_cr4(vcpu, cr4)) |
0f12244f | 671 | return 1; |
a03490ed | 672 | |
ad756a16 MJ |
673 | if (((cr4 ^ old_cr4) & pdptr_bits) || |
674 | (!(cr4 & X86_CR4_PCIDE) && (old_cr4 & X86_CR4_PCIDE))) | |
aad82703 | 675 | kvm_mmu_reset_context(vcpu); |
0f12244f | 676 | |
2acf923e | 677 | if ((cr4 ^ old_cr4) & X86_CR4_OSXSAVE) |
00b27a3e | 678 | kvm_update_cpuid(vcpu); |
2acf923e | 679 | |
0f12244f GN |
680 | return 0; |
681 | } | |
2d3ad1f4 | 682 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 683 | |
2390218b | 684 | int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 685 | { |
9f8fe504 | 686 | if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) { |
0ba73cda | 687 | kvm_mmu_sync_roots(vcpu); |
d835dfec | 688 | kvm_mmu_flush_tlb(vcpu); |
0f12244f | 689 | return 0; |
d835dfec AK |
690 | } |
691 | ||
a03490ed | 692 | if (is_long_mode(vcpu)) { |
471842ec | 693 | if (kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE)) { |
ad756a16 MJ |
694 | if (cr3 & CR3_PCID_ENABLED_RESERVED_BITS) |
695 | return 1; | |
696 | } else | |
697 | if (cr3 & CR3_L_MODE_RESERVED_BITS) | |
698 | return 1; | |
a03490ed CO |
699 | } else { |
700 | if (is_pae(vcpu)) { | |
0f12244f GN |
701 | if (cr3 & CR3_PAE_RESERVED_BITS) |
702 | return 1; | |
ff03a073 JR |
703 | if (is_paging(vcpu) && |
704 | !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) | |
0f12244f | 705 | return 1; |
a03490ed CO |
706 | } |
707 | /* | |
708 | * We don't check reserved bits in nonpae mode, because | |
709 | * this isn't enforced, and VMware depends on this. | |
710 | */ | |
711 | } | |
712 | ||
0f12244f | 713 | vcpu->arch.cr3 = cr3; |
aff48baa | 714 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
d8d173da | 715 | kvm_mmu_new_cr3(vcpu); |
0f12244f GN |
716 | return 0; |
717 | } | |
2d3ad1f4 | 718 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 719 | |
eea1cff9 | 720 | int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed | 721 | { |
0f12244f GN |
722 | if (cr8 & CR8_RESERVED_BITS) |
723 | return 1; | |
a03490ed CO |
724 | if (irqchip_in_kernel(vcpu->kvm)) |
725 | kvm_lapic_set_tpr(vcpu, cr8); | |
726 | else | |
ad312c7c | 727 | vcpu->arch.cr8 = cr8; |
0f12244f GN |
728 | return 0; |
729 | } | |
2d3ad1f4 | 730 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 731 | |
2d3ad1f4 | 732 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed CO |
733 | { |
734 | if (irqchip_in_kernel(vcpu->kvm)) | |
735 | return kvm_lapic_get_cr8(vcpu); | |
736 | else | |
ad312c7c | 737 | return vcpu->arch.cr8; |
a03490ed | 738 | } |
2d3ad1f4 | 739 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 740 | |
73aaf249 JK |
741 | static void kvm_update_dr6(struct kvm_vcpu *vcpu) |
742 | { | |
743 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
744 | kvm_x86_ops->set_dr6(vcpu, vcpu->arch.dr6); | |
745 | } | |
746 | ||
c8639010 JK |
747 | static void kvm_update_dr7(struct kvm_vcpu *vcpu) |
748 | { | |
749 | unsigned long dr7; | |
750 | ||
751 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) | |
752 | dr7 = vcpu->arch.guest_debug_dr7; | |
753 | else | |
754 | dr7 = vcpu->arch.dr7; | |
755 | kvm_x86_ops->set_dr7(vcpu, dr7); | |
756 | vcpu->arch.switch_db_regs = (dr7 & DR7_BP_EN_MASK); | |
757 | } | |
758 | ||
338dbc97 | 759 | static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
020df079 GN |
760 | { |
761 | switch (dr) { | |
762 | case 0 ... 3: | |
763 | vcpu->arch.db[dr] = val; | |
764 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
765 | vcpu->arch.eff_db[dr] = val; | |
766 | break; | |
767 | case 4: | |
338dbc97 GN |
768 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
769 | return 1; /* #UD */ | |
020df079 GN |
770 | /* fall through */ |
771 | case 6: | |
338dbc97 GN |
772 | if (val & 0xffffffff00000000ULL) |
773 | return -1; /* #GP */ | |
020df079 | 774 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1; |
73aaf249 | 775 | kvm_update_dr6(vcpu); |
020df079 GN |
776 | break; |
777 | case 5: | |
338dbc97 GN |
778 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
779 | return 1; /* #UD */ | |
020df079 GN |
780 | /* fall through */ |
781 | default: /* 7 */ | |
338dbc97 GN |
782 | if (val & 0xffffffff00000000ULL) |
783 | return -1; /* #GP */ | |
020df079 | 784 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; |
c8639010 | 785 | kvm_update_dr7(vcpu); |
020df079 GN |
786 | break; |
787 | } | |
788 | ||
789 | return 0; | |
790 | } | |
338dbc97 GN |
791 | |
792 | int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) | |
793 | { | |
794 | int res; | |
795 | ||
796 | res = __kvm_set_dr(vcpu, dr, val); | |
797 | if (res > 0) | |
798 | kvm_queue_exception(vcpu, UD_VECTOR); | |
799 | else if (res < 0) | |
800 | kvm_inject_gp(vcpu, 0); | |
801 | ||
802 | return res; | |
803 | } | |
020df079 GN |
804 | EXPORT_SYMBOL_GPL(kvm_set_dr); |
805 | ||
338dbc97 | 806 | static int _kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) |
020df079 GN |
807 | { |
808 | switch (dr) { | |
809 | case 0 ... 3: | |
810 | *val = vcpu->arch.db[dr]; | |
811 | break; | |
812 | case 4: | |
338dbc97 | 813 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
020df079 | 814 | return 1; |
020df079 GN |
815 | /* fall through */ |
816 | case 6: | |
73aaf249 JK |
817 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
818 | *val = vcpu->arch.dr6; | |
819 | else | |
820 | *val = kvm_x86_ops->get_dr6(vcpu); | |
020df079 GN |
821 | break; |
822 | case 5: | |
338dbc97 | 823 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
020df079 | 824 | return 1; |
020df079 GN |
825 | /* fall through */ |
826 | default: /* 7 */ | |
827 | *val = vcpu->arch.dr7; | |
828 | break; | |
829 | } | |
830 | ||
831 | return 0; | |
832 | } | |
338dbc97 GN |
833 | |
834 | int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) | |
835 | { | |
836 | if (_kvm_get_dr(vcpu, dr, val)) { | |
837 | kvm_queue_exception(vcpu, UD_VECTOR); | |
838 | return 1; | |
839 | } | |
840 | return 0; | |
841 | } | |
020df079 GN |
842 | EXPORT_SYMBOL_GPL(kvm_get_dr); |
843 | ||
022cd0e8 AK |
844 | bool kvm_rdpmc(struct kvm_vcpu *vcpu) |
845 | { | |
846 | u32 ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
847 | u64 data; | |
848 | int err; | |
849 | ||
850 | err = kvm_pmu_read_pmc(vcpu, ecx, &data); | |
851 | if (err) | |
852 | return err; | |
853 | kvm_register_write(vcpu, VCPU_REGS_RAX, (u32)data); | |
854 | kvm_register_write(vcpu, VCPU_REGS_RDX, data >> 32); | |
855 | return err; | |
856 | } | |
857 | EXPORT_SYMBOL_GPL(kvm_rdpmc); | |
858 | ||
043405e1 CO |
859 | /* |
860 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
861 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
862 | * | |
863 | * This list is modified at module load time to reflect the | |
e3267cbb GC |
864 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
865 | * kvm-specific. Those are put in the beginning of the list. | |
043405e1 | 866 | */ |
e3267cbb | 867 | |
e984097b | 868 | #define KVM_SAVE_MSRS_BEGIN 12 |
043405e1 | 869 | static u32 msrs_to_save[] = { |
e3267cbb | 870 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
11c6bffa | 871 | MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW, |
55cd8e5a | 872 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, |
e984097b | 873 | HV_X64_MSR_TIME_REF_COUNT, HV_X64_MSR_REFERENCE_TSC, |
c9aaa895 | 874 | HV_X64_MSR_APIC_ASSIST_PAGE, MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME, |
ae7a2a3f | 875 | MSR_KVM_PV_EOI_EN, |
043405e1 | 876 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, |
8c06585d | 877 | MSR_STAR, |
043405e1 CO |
878 | #ifdef CONFIG_X86_64 |
879 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
880 | #endif | |
b3897a49 NHE |
881 | MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA, |
882 | MSR_IA32_FEATURE_CONTROL | |
043405e1 CO |
883 | }; |
884 | ||
885 | static unsigned num_msrs_to_save; | |
886 | ||
f1d24831 | 887 | static const u32 emulated_msrs[] = { |
ba904635 | 888 | MSR_IA32_TSC_ADJUST, |
a3e06bbe | 889 | MSR_IA32_TSCDEADLINE, |
043405e1 | 890 | MSR_IA32_MISC_ENABLE, |
908e75f3 AK |
891 | MSR_IA32_MCG_STATUS, |
892 | MSR_IA32_MCG_CTL, | |
043405e1 CO |
893 | }; |
894 | ||
384bb783 | 895 | bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer) |
15c4a640 | 896 | { |
b69e8cae | 897 | if (efer & efer_reserved_bits) |
384bb783 | 898 | return false; |
15c4a640 | 899 | |
1b2fd70c AG |
900 | if (efer & EFER_FFXSR) { |
901 | struct kvm_cpuid_entry2 *feat; | |
902 | ||
903 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae | 904 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) |
384bb783 | 905 | return false; |
1b2fd70c AG |
906 | } |
907 | ||
d8017474 AG |
908 | if (efer & EFER_SVME) { |
909 | struct kvm_cpuid_entry2 *feat; | |
910 | ||
911 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae | 912 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) |
384bb783 | 913 | return false; |
d8017474 AG |
914 | } |
915 | ||
384bb783 JK |
916 | return true; |
917 | } | |
918 | EXPORT_SYMBOL_GPL(kvm_valid_efer); | |
919 | ||
920 | static int set_efer(struct kvm_vcpu *vcpu, u64 efer) | |
921 | { | |
922 | u64 old_efer = vcpu->arch.efer; | |
923 | ||
924 | if (!kvm_valid_efer(vcpu, efer)) | |
925 | return 1; | |
926 | ||
927 | if (is_paging(vcpu) | |
928 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) | |
929 | return 1; | |
930 | ||
15c4a640 | 931 | efer &= ~EFER_LMA; |
f6801dff | 932 | efer |= vcpu->arch.efer & EFER_LMA; |
15c4a640 | 933 | |
a3d204e2 SY |
934 | kvm_x86_ops->set_efer(vcpu, efer); |
935 | ||
aad82703 SY |
936 | /* Update reserved bits */ |
937 | if ((efer ^ old_efer) & EFER_NX) | |
938 | kvm_mmu_reset_context(vcpu); | |
939 | ||
b69e8cae | 940 | return 0; |
15c4a640 CO |
941 | } |
942 | ||
f2b4b7dd JR |
943 | void kvm_enable_efer_bits(u64 mask) |
944 | { | |
945 | efer_reserved_bits &= ~mask; | |
946 | } | |
947 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
948 | ||
949 | ||
15c4a640 CO |
950 | /* |
951 | * Writes msr value into into the appropriate "register". | |
952 | * Returns 0 on success, non-0 otherwise. | |
953 | * Assumes vcpu_load() was already called. | |
954 | */ | |
8fe8ab46 | 955 | int kvm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
15c4a640 | 956 | { |
8fe8ab46 | 957 | return kvm_x86_ops->set_msr(vcpu, msr); |
15c4a640 CO |
958 | } |
959 | ||
313a3dc7 CO |
960 | /* |
961 | * Adapt set_msr() to msr_io()'s calling convention | |
962 | */ | |
963 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
964 | { | |
8fe8ab46 WA |
965 | struct msr_data msr; |
966 | ||
967 | msr.data = *data; | |
968 | msr.index = index; | |
969 | msr.host_initiated = true; | |
970 | return kvm_set_msr(vcpu, &msr); | |
313a3dc7 CO |
971 | } |
972 | ||
16e8d74d MT |
973 | #ifdef CONFIG_X86_64 |
974 | struct pvclock_gtod_data { | |
975 | seqcount_t seq; | |
976 | ||
977 | struct { /* extract of a clocksource struct */ | |
978 | int vclock_mode; | |
979 | cycle_t cycle_last; | |
980 | cycle_t mask; | |
981 | u32 mult; | |
982 | u32 shift; | |
983 | } clock; | |
984 | ||
985 | /* open coded 'struct timespec' */ | |
986 | u64 monotonic_time_snsec; | |
987 | time_t monotonic_time_sec; | |
988 | }; | |
989 | ||
990 | static struct pvclock_gtod_data pvclock_gtod_data; | |
991 | ||
992 | static void update_pvclock_gtod(struct timekeeper *tk) | |
993 | { | |
994 | struct pvclock_gtod_data *vdata = &pvclock_gtod_data; | |
995 | ||
996 | write_seqcount_begin(&vdata->seq); | |
997 | ||
998 | /* copy pvclock gtod data */ | |
999 | vdata->clock.vclock_mode = tk->clock->archdata.vclock_mode; | |
1000 | vdata->clock.cycle_last = tk->clock->cycle_last; | |
1001 | vdata->clock.mask = tk->clock->mask; | |
1002 | vdata->clock.mult = tk->mult; | |
1003 | vdata->clock.shift = tk->shift; | |
1004 | ||
1005 | vdata->monotonic_time_sec = tk->xtime_sec | |
1006 | + tk->wall_to_monotonic.tv_sec; | |
1007 | vdata->monotonic_time_snsec = tk->xtime_nsec | |
1008 | + (tk->wall_to_monotonic.tv_nsec | |
1009 | << tk->shift); | |
1010 | while (vdata->monotonic_time_snsec >= | |
1011 | (((u64)NSEC_PER_SEC) << tk->shift)) { | |
1012 | vdata->monotonic_time_snsec -= | |
1013 | ((u64)NSEC_PER_SEC) << tk->shift; | |
1014 | vdata->monotonic_time_sec++; | |
1015 | } | |
1016 | ||
1017 | write_seqcount_end(&vdata->seq); | |
1018 | } | |
1019 | #endif | |
1020 | ||
1021 | ||
18068523 GOC |
1022 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
1023 | { | |
9ed3c444 AK |
1024 | int version; |
1025 | int r; | |
50d0a0f9 | 1026 | struct pvclock_wall_clock wc; |
923de3cf | 1027 | struct timespec boot; |
18068523 GOC |
1028 | |
1029 | if (!wall_clock) | |
1030 | return; | |
1031 | ||
9ed3c444 AK |
1032 | r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version)); |
1033 | if (r) | |
1034 | return; | |
1035 | ||
1036 | if (version & 1) | |
1037 | ++version; /* first time write, random junk */ | |
1038 | ||
1039 | ++version; | |
18068523 | 1040 | |
18068523 GOC |
1041 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
1042 | ||
50d0a0f9 GH |
1043 | /* |
1044 | * The guest calculates current wall clock time by adding | |
34c238a1 | 1045 | * system time (updated by kvm_guest_time_update below) to the |
50d0a0f9 GH |
1046 | * wall clock specified here. guest system time equals host |
1047 | * system time for us, thus we must fill in host boot time here. | |
1048 | */ | |
923de3cf | 1049 | getboottime(&boot); |
50d0a0f9 | 1050 | |
4b648665 BR |
1051 | if (kvm->arch.kvmclock_offset) { |
1052 | struct timespec ts = ns_to_timespec(kvm->arch.kvmclock_offset); | |
1053 | boot = timespec_sub(boot, ts); | |
1054 | } | |
50d0a0f9 GH |
1055 | wc.sec = boot.tv_sec; |
1056 | wc.nsec = boot.tv_nsec; | |
1057 | wc.version = version; | |
18068523 GOC |
1058 | |
1059 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
1060 | ||
1061 | version++; | |
1062 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
1063 | } |
1064 | ||
50d0a0f9 GH |
1065 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
1066 | { | |
1067 | uint32_t quotient, remainder; | |
1068 | ||
1069 | /* Don't try to replace with do_div(), this one calculates | |
1070 | * "(dividend << 32) / divisor" */ | |
1071 | __asm__ ( "divl %4" | |
1072 | : "=a" (quotient), "=d" (remainder) | |
1073 | : "0" (0), "1" (dividend), "r" (divisor) ); | |
1074 | return quotient; | |
1075 | } | |
1076 | ||
5f4e3f88 ZA |
1077 | static void kvm_get_time_scale(uint32_t scaled_khz, uint32_t base_khz, |
1078 | s8 *pshift, u32 *pmultiplier) | |
50d0a0f9 | 1079 | { |
5f4e3f88 | 1080 | uint64_t scaled64; |
50d0a0f9 GH |
1081 | int32_t shift = 0; |
1082 | uint64_t tps64; | |
1083 | uint32_t tps32; | |
1084 | ||
5f4e3f88 ZA |
1085 | tps64 = base_khz * 1000LL; |
1086 | scaled64 = scaled_khz * 1000LL; | |
50933623 | 1087 | while (tps64 > scaled64*2 || tps64 & 0xffffffff00000000ULL) { |
50d0a0f9 GH |
1088 | tps64 >>= 1; |
1089 | shift--; | |
1090 | } | |
1091 | ||
1092 | tps32 = (uint32_t)tps64; | |
50933623 JK |
1093 | while (tps32 <= scaled64 || scaled64 & 0xffffffff00000000ULL) { |
1094 | if (scaled64 & 0xffffffff00000000ULL || tps32 & 0x80000000) | |
5f4e3f88 ZA |
1095 | scaled64 >>= 1; |
1096 | else | |
1097 | tps32 <<= 1; | |
50d0a0f9 GH |
1098 | shift++; |
1099 | } | |
1100 | ||
5f4e3f88 ZA |
1101 | *pshift = shift; |
1102 | *pmultiplier = div_frac(scaled64, tps32); | |
50d0a0f9 | 1103 | |
5f4e3f88 ZA |
1104 | pr_debug("%s: base_khz %u => %u, shift %d, mul %u\n", |
1105 | __func__, base_khz, scaled_khz, shift, *pmultiplier); | |
50d0a0f9 GH |
1106 | } |
1107 | ||
759379dd ZA |
1108 | static inline u64 get_kernel_ns(void) |
1109 | { | |
1110 | struct timespec ts; | |
1111 | ||
1112 | WARN_ON(preemptible()); | |
1113 | ktime_get_ts(&ts); | |
1114 | monotonic_to_bootbased(&ts); | |
1115 | return timespec_to_ns(&ts); | |
50d0a0f9 GH |
1116 | } |
1117 | ||
d828199e | 1118 | #ifdef CONFIG_X86_64 |
16e8d74d | 1119 | static atomic_t kvm_guest_has_master_clock = ATOMIC_INIT(0); |
d828199e | 1120 | #endif |
16e8d74d | 1121 | |
c8076604 | 1122 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
c285545f | 1123 | unsigned long max_tsc_khz; |
c8076604 | 1124 | |
cc578287 | 1125 | static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec) |
8cfdc000 | 1126 | { |
cc578287 ZA |
1127 | return pvclock_scale_delta(nsec, vcpu->arch.virtual_tsc_mult, |
1128 | vcpu->arch.virtual_tsc_shift); | |
8cfdc000 ZA |
1129 | } |
1130 | ||
cc578287 | 1131 | static u32 adjust_tsc_khz(u32 khz, s32 ppm) |
1e993611 | 1132 | { |
cc578287 ZA |
1133 | u64 v = (u64)khz * (1000000 + ppm); |
1134 | do_div(v, 1000000); | |
1135 | return v; | |
1e993611 JR |
1136 | } |
1137 | ||
cc578287 | 1138 | static void kvm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 this_tsc_khz) |
759379dd | 1139 | { |
cc578287 ZA |
1140 | u32 thresh_lo, thresh_hi; |
1141 | int use_scaling = 0; | |
217fc9cf | 1142 | |
03ba32ca MT |
1143 | /* tsc_khz can be zero if TSC calibration fails */ |
1144 | if (this_tsc_khz == 0) | |
1145 | return; | |
1146 | ||
c285545f ZA |
1147 | /* Compute a scale to convert nanoseconds in TSC cycles */ |
1148 | kvm_get_time_scale(this_tsc_khz, NSEC_PER_SEC / 1000, | |
cc578287 ZA |
1149 | &vcpu->arch.virtual_tsc_shift, |
1150 | &vcpu->arch.virtual_tsc_mult); | |
1151 | vcpu->arch.virtual_tsc_khz = this_tsc_khz; | |
1152 | ||
1153 | /* | |
1154 | * Compute the variation in TSC rate which is acceptable | |
1155 | * within the range of tolerance and decide if the | |
1156 | * rate being applied is within that bounds of the hardware | |
1157 | * rate. If so, no scaling or compensation need be done. | |
1158 | */ | |
1159 | thresh_lo = adjust_tsc_khz(tsc_khz, -tsc_tolerance_ppm); | |
1160 | thresh_hi = adjust_tsc_khz(tsc_khz, tsc_tolerance_ppm); | |
1161 | if (this_tsc_khz < thresh_lo || this_tsc_khz > thresh_hi) { | |
1162 | pr_debug("kvm: requested TSC rate %u falls outside tolerance [%u,%u]\n", this_tsc_khz, thresh_lo, thresh_hi); | |
1163 | use_scaling = 1; | |
1164 | } | |
1165 | kvm_x86_ops->set_tsc_khz(vcpu, this_tsc_khz, use_scaling); | |
c285545f ZA |
1166 | } |
1167 | ||
1168 | static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns) | |
1169 | { | |
e26101b1 | 1170 | u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.this_tsc_nsec, |
cc578287 ZA |
1171 | vcpu->arch.virtual_tsc_mult, |
1172 | vcpu->arch.virtual_tsc_shift); | |
e26101b1 | 1173 | tsc += vcpu->arch.this_tsc_write; |
c285545f ZA |
1174 | return tsc; |
1175 | } | |
1176 | ||
b48aa97e MT |
1177 | void kvm_track_tsc_matching(struct kvm_vcpu *vcpu) |
1178 | { | |
1179 | #ifdef CONFIG_X86_64 | |
1180 | bool vcpus_matched; | |
1181 | bool do_request = false; | |
1182 | struct kvm_arch *ka = &vcpu->kvm->arch; | |
1183 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1184 | ||
1185 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1186 | atomic_read(&vcpu->kvm->online_vcpus)); | |
1187 | ||
1188 | if (vcpus_matched && gtod->clock.vclock_mode == VCLOCK_TSC) | |
1189 | if (!ka->use_master_clock) | |
1190 | do_request = 1; | |
1191 | ||
1192 | if (!vcpus_matched && ka->use_master_clock) | |
1193 | do_request = 1; | |
1194 | ||
1195 | if (do_request) | |
1196 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); | |
1197 | ||
1198 | trace_kvm_track_tsc(vcpu->vcpu_id, ka->nr_vcpus_matched_tsc, | |
1199 | atomic_read(&vcpu->kvm->online_vcpus), | |
1200 | ka->use_master_clock, gtod->clock.vclock_mode); | |
1201 | #endif | |
1202 | } | |
1203 | ||
ba904635 WA |
1204 | static void update_ia32_tsc_adjust_msr(struct kvm_vcpu *vcpu, s64 offset) |
1205 | { | |
1206 | u64 curr_offset = kvm_x86_ops->read_tsc_offset(vcpu); | |
1207 | vcpu->arch.ia32_tsc_adjust_msr += offset - curr_offset; | |
1208 | } | |
1209 | ||
8fe8ab46 | 1210 | void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr) |
99e3e30a ZA |
1211 | { |
1212 | struct kvm *kvm = vcpu->kvm; | |
f38e098f | 1213 | u64 offset, ns, elapsed; |
99e3e30a | 1214 | unsigned long flags; |
02626b6a | 1215 | s64 usdiff; |
b48aa97e | 1216 | bool matched; |
8fe8ab46 | 1217 | u64 data = msr->data; |
99e3e30a | 1218 | |
038f8c11 | 1219 | raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags); |
857e4099 | 1220 | offset = kvm_x86_ops->compute_tsc_offset(vcpu, data); |
759379dd | 1221 | ns = get_kernel_ns(); |
f38e098f | 1222 | elapsed = ns - kvm->arch.last_tsc_nsec; |
5d3cb0f6 | 1223 | |
03ba32ca | 1224 | if (vcpu->arch.virtual_tsc_khz) { |
8915aa27 MT |
1225 | int faulted = 0; |
1226 | ||
03ba32ca MT |
1227 | /* n.b - signed multiplication and division required */ |
1228 | usdiff = data - kvm->arch.last_tsc_write; | |
5d3cb0f6 | 1229 | #ifdef CONFIG_X86_64 |
03ba32ca | 1230 | usdiff = (usdiff * 1000) / vcpu->arch.virtual_tsc_khz; |
5d3cb0f6 | 1231 | #else |
03ba32ca | 1232 | /* do_div() only does unsigned */ |
8915aa27 MT |
1233 | asm("1: idivl %[divisor]\n" |
1234 | "2: xor %%edx, %%edx\n" | |
1235 | " movl $0, %[faulted]\n" | |
1236 | "3:\n" | |
1237 | ".section .fixup,\"ax\"\n" | |
1238 | "4: movl $1, %[faulted]\n" | |
1239 | " jmp 3b\n" | |
1240 | ".previous\n" | |
1241 | ||
1242 | _ASM_EXTABLE(1b, 4b) | |
1243 | ||
1244 | : "=A"(usdiff), [faulted] "=r" (faulted) | |
1245 | : "A"(usdiff * 1000), [divisor] "rm"(vcpu->arch.virtual_tsc_khz)); | |
1246 | ||
5d3cb0f6 | 1247 | #endif |
03ba32ca MT |
1248 | do_div(elapsed, 1000); |
1249 | usdiff -= elapsed; | |
1250 | if (usdiff < 0) | |
1251 | usdiff = -usdiff; | |
8915aa27 MT |
1252 | |
1253 | /* idivl overflow => difference is larger than USEC_PER_SEC */ | |
1254 | if (faulted) | |
1255 | usdiff = USEC_PER_SEC; | |
03ba32ca MT |
1256 | } else |
1257 | usdiff = USEC_PER_SEC; /* disable TSC match window below */ | |
f38e098f ZA |
1258 | |
1259 | /* | |
5d3cb0f6 ZA |
1260 | * Special case: TSC write with a small delta (1 second) of virtual |
1261 | * cycle time against real time is interpreted as an attempt to | |
1262 | * synchronize the CPU. | |
1263 | * | |
1264 | * For a reliable TSC, we can match TSC offsets, and for an unstable | |
1265 | * TSC, we add elapsed time in this computation. We could let the | |
1266 | * compensation code attempt to catch up if we fall behind, but | |
1267 | * it's better to try to match offsets from the beginning. | |
1268 | */ | |
02626b6a | 1269 | if (usdiff < USEC_PER_SEC && |
5d3cb0f6 | 1270 | vcpu->arch.virtual_tsc_khz == kvm->arch.last_tsc_khz) { |
f38e098f | 1271 | if (!check_tsc_unstable()) { |
e26101b1 | 1272 | offset = kvm->arch.cur_tsc_offset; |
f38e098f ZA |
1273 | pr_debug("kvm: matched tsc offset for %llu\n", data); |
1274 | } else { | |
857e4099 | 1275 | u64 delta = nsec_to_cycles(vcpu, elapsed); |
5d3cb0f6 ZA |
1276 | data += delta; |
1277 | offset = kvm_x86_ops->compute_tsc_offset(vcpu, data); | |
759379dd | 1278 | pr_debug("kvm: adjusted tsc offset by %llu\n", delta); |
f38e098f | 1279 | } |
b48aa97e | 1280 | matched = true; |
e26101b1 ZA |
1281 | } else { |
1282 | /* | |
1283 | * We split periods of matched TSC writes into generations. | |
1284 | * For each generation, we track the original measured | |
1285 | * nanosecond time, offset, and write, so if TSCs are in | |
1286 | * sync, we can match exact offset, and if not, we can match | |
4a969980 | 1287 | * exact software computation in compute_guest_tsc() |
e26101b1 ZA |
1288 | * |
1289 | * These values are tracked in kvm->arch.cur_xxx variables. | |
1290 | */ | |
1291 | kvm->arch.cur_tsc_generation++; | |
1292 | kvm->arch.cur_tsc_nsec = ns; | |
1293 | kvm->arch.cur_tsc_write = data; | |
1294 | kvm->arch.cur_tsc_offset = offset; | |
b48aa97e | 1295 | matched = false; |
e26101b1 ZA |
1296 | pr_debug("kvm: new tsc generation %u, clock %llu\n", |
1297 | kvm->arch.cur_tsc_generation, data); | |
f38e098f | 1298 | } |
e26101b1 ZA |
1299 | |
1300 | /* | |
1301 | * We also track th most recent recorded KHZ, write and time to | |
1302 | * allow the matching interval to be extended at each write. | |
1303 | */ | |
f38e098f ZA |
1304 | kvm->arch.last_tsc_nsec = ns; |
1305 | kvm->arch.last_tsc_write = data; | |
5d3cb0f6 | 1306 | kvm->arch.last_tsc_khz = vcpu->arch.virtual_tsc_khz; |
99e3e30a | 1307 | |
b183aa58 | 1308 | vcpu->arch.last_guest_tsc = data; |
e26101b1 ZA |
1309 | |
1310 | /* Keep track of which generation this VCPU has synchronized to */ | |
1311 | vcpu->arch.this_tsc_generation = kvm->arch.cur_tsc_generation; | |
1312 | vcpu->arch.this_tsc_nsec = kvm->arch.cur_tsc_nsec; | |
1313 | vcpu->arch.this_tsc_write = kvm->arch.cur_tsc_write; | |
1314 | ||
ba904635 WA |
1315 | if (guest_cpuid_has_tsc_adjust(vcpu) && !msr->host_initiated) |
1316 | update_ia32_tsc_adjust_msr(vcpu, offset); | |
e26101b1 ZA |
1317 | kvm_x86_ops->write_tsc_offset(vcpu, offset); |
1318 | raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags); | |
b48aa97e MT |
1319 | |
1320 | spin_lock(&kvm->arch.pvclock_gtod_sync_lock); | |
1321 | if (matched) | |
1322 | kvm->arch.nr_vcpus_matched_tsc++; | |
1323 | else | |
1324 | kvm->arch.nr_vcpus_matched_tsc = 0; | |
1325 | ||
1326 | kvm_track_tsc_matching(vcpu); | |
1327 | spin_unlock(&kvm->arch.pvclock_gtod_sync_lock); | |
99e3e30a | 1328 | } |
e26101b1 | 1329 | |
99e3e30a ZA |
1330 | EXPORT_SYMBOL_GPL(kvm_write_tsc); |
1331 | ||
d828199e MT |
1332 | #ifdef CONFIG_X86_64 |
1333 | ||
1334 | static cycle_t read_tsc(void) | |
1335 | { | |
1336 | cycle_t ret; | |
1337 | u64 last; | |
1338 | ||
1339 | /* | |
1340 | * Empirically, a fence (of type that depends on the CPU) | |
1341 | * before rdtsc is enough to ensure that rdtsc is ordered | |
1342 | * with respect to loads. The various CPU manuals are unclear | |
1343 | * as to whether rdtsc can be reordered with later loads, | |
1344 | * but no one has ever seen it happen. | |
1345 | */ | |
1346 | rdtsc_barrier(); | |
1347 | ret = (cycle_t)vget_cycles(); | |
1348 | ||
1349 | last = pvclock_gtod_data.clock.cycle_last; | |
1350 | ||
1351 | if (likely(ret >= last)) | |
1352 | return ret; | |
1353 | ||
1354 | /* | |
1355 | * GCC likes to generate cmov here, but this branch is extremely | |
1356 | * predictable (it's just a funciton of time and the likely is | |
1357 | * very likely) and there's a data dependence, so force GCC | |
1358 | * to generate a branch instead. I don't barrier() because | |
1359 | * we don't actually need a barrier, and if this function | |
1360 | * ever gets inlined it will generate worse code. | |
1361 | */ | |
1362 | asm volatile (""); | |
1363 | return last; | |
1364 | } | |
1365 | ||
1366 | static inline u64 vgettsc(cycle_t *cycle_now) | |
1367 | { | |
1368 | long v; | |
1369 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1370 | ||
1371 | *cycle_now = read_tsc(); | |
1372 | ||
1373 | v = (*cycle_now - gtod->clock.cycle_last) & gtod->clock.mask; | |
1374 | return v * gtod->clock.mult; | |
1375 | } | |
1376 | ||
1377 | static int do_monotonic(struct timespec *ts, cycle_t *cycle_now) | |
1378 | { | |
1379 | unsigned long seq; | |
1380 | u64 ns; | |
1381 | int mode; | |
1382 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1383 | ||
1384 | ts->tv_nsec = 0; | |
1385 | do { | |
1386 | seq = read_seqcount_begin(>od->seq); | |
1387 | mode = gtod->clock.vclock_mode; | |
1388 | ts->tv_sec = gtod->monotonic_time_sec; | |
1389 | ns = gtod->monotonic_time_snsec; | |
1390 | ns += vgettsc(cycle_now); | |
1391 | ns >>= gtod->clock.shift; | |
1392 | } while (unlikely(read_seqcount_retry(>od->seq, seq))); | |
1393 | timespec_add_ns(ts, ns); | |
1394 | ||
1395 | return mode; | |
1396 | } | |
1397 | ||
1398 | /* returns true if host is using tsc clocksource */ | |
1399 | static bool kvm_get_time_and_clockread(s64 *kernel_ns, cycle_t *cycle_now) | |
1400 | { | |
1401 | struct timespec ts; | |
1402 | ||
1403 | /* checked again under seqlock below */ | |
1404 | if (pvclock_gtod_data.clock.vclock_mode != VCLOCK_TSC) | |
1405 | return false; | |
1406 | ||
1407 | if (do_monotonic(&ts, cycle_now) != VCLOCK_TSC) | |
1408 | return false; | |
1409 | ||
1410 | monotonic_to_bootbased(&ts); | |
1411 | *kernel_ns = timespec_to_ns(&ts); | |
1412 | ||
1413 | return true; | |
1414 | } | |
1415 | #endif | |
1416 | ||
1417 | /* | |
1418 | * | |
b48aa97e MT |
1419 | * Assuming a stable TSC across physical CPUS, and a stable TSC |
1420 | * across virtual CPUs, the following condition is possible. | |
1421 | * Each numbered line represents an event visible to both | |
d828199e MT |
1422 | * CPUs at the next numbered event. |
1423 | * | |
1424 | * "timespecX" represents host monotonic time. "tscX" represents | |
1425 | * RDTSC value. | |
1426 | * | |
1427 | * VCPU0 on CPU0 | VCPU1 on CPU1 | |
1428 | * | |
1429 | * 1. read timespec0,tsc0 | |
1430 | * 2. | timespec1 = timespec0 + N | |
1431 | * | tsc1 = tsc0 + M | |
1432 | * 3. transition to guest | transition to guest | |
1433 | * 4. ret0 = timespec0 + (rdtsc - tsc0) | | |
1434 | * 5. | ret1 = timespec1 + (rdtsc - tsc1) | |
1435 | * | ret1 = timespec0 + N + (rdtsc - (tsc0 + M)) | |
1436 | * | |
1437 | * Since ret0 update is visible to VCPU1 at time 5, to obey monotonicity: | |
1438 | * | |
1439 | * - ret0 < ret1 | |
1440 | * - timespec0 + (rdtsc - tsc0) < timespec0 + N + (rdtsc - (tsc0 + M)) | |
1441 | * ... | |
1442 | * - 0 < N - M => M < N | |
1443 | * | |
1444 | * That is, when timespec0 != timespec1, M < N. Unfortunately that is not | |
1445 | * always the case (the difference between two distinct xtime instances | |
1446 | * might be smaller then the difference between corresponding TSC reads, | |
1447 | * when updating guest vcpus pvclock areas). | |
1448 | * | |
1449 | * To avoid that problem, do not allow visibility of distinct | |
1450 | * system_timestamp/tsc_timestamp values simultaneously: use a master | |
1451 | * copy of host monotonic time values. Update that master copy | |
1452 | * in lockstep. | |
1453 | * | |
b48aa97e | 1454 | * Rely on synchronization of host TSCs and guest TSCs for monotonicity. |
d828199e MT |
1455 | * |
1456 | */ | |
1457 | ||
1458 | static void pvclock_update_vm_gtod_copy(struct kvm *kvm) | |
1459 | { | |
1460 | #ifdef CONFIG_X86_64 | |
1461 | struct kvm_arch *ka = &kvm->arch; | |
1462 | int vclock_mode; | |
b48aa97e MT |
1463 | bool host_tsc_clocksource, vcpus_matched; |
1464 | ||
1465 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1466 | atomic_read(&kvm->online_vcpus)); | |
d828199e MT |
1467 | |
1468 | /* | |
1469 | * If the host uses TSC clock, then passthrough TSC as stable | |
1470 | * to the guest. | |
1471 | */ | |
b48aa97e | 1472 | host_tsc_clocksource = kvm_get_time_and_clockread( |
d828199e MT |
1473 | &ka->master_kernel_ns, |
1474 | &ka->master_cycle_now); | |
1475 | ||
b48aa97e MT |
1476 | ka->use_master_clock = host_tsc_clocksource & vcpus_matched; |
1477 | ||
d828199e MT |
1478 | if (ka->use_master_clock) |
1479 | atomic_set(&kvm_guest_has_master_clock, 1); | |
1480 | ||
1481 | vclock_mode = pvclock_gtod_data.clock.vclock_mode; | |
b48aa97e MT |
1482 | trace_kvm_update_master_clock(ka->use_master_clock, vclock_mode, |
1483 | vcpus_matched); | |
d828199e MT |
1484 | #endif |
1485 | } | |
1486 | ||
2e762ff7 MT |
1487 | static void kvm_gen_update_masterclock(struct kvm *kvm) |
1488 | { | |
1489 | #ifdef CONFIG_X86_64 | |
1490 | int i; | |
1491 | struct kvm_vcpu *vcpu; | |
1492 | struct kvm_arch *ka = &kvm->arch; | |
1493 | ||
1494 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
1495 | kvm_make_mclock_inprogress_request(kvm); | |
1496 | /* no guest entries from this point */ | |
1497 | pvclock_update_vm_gtod_copy(kvm); | |
1498 | ||
1499 | kvm_for_each_vcpu(i, vcpu, kvm) | |
1500 | set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); | |
1501 | ||
1502 | /* guest entries allowed */ | |
1503 | kvm_for_each_vcpu(i, vcpu, kvm) | |
1504 | clear_bit(KVM_REQ_MCLOCK_INPROGRESS, &vcpu->requests); | |
1505 | ||
1506 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
1507 | #endif | |
1508 | } | |
1509 | ||
34c238a1 | 1510 | static int kvm_guest_time_update(struct kvm_vcpu *v) |
18068523 | 1511 | { |
d828199e | 1512 | unsigned long flags, this_tsc_khz; |
18068523 | 1513 | struct kvm_vcpu_arch *vcpu = &v->arch; |
d828199e | 1514 | struct kvm_arch *ka = &v->kvm->arch; |
f25e656d | 1515 | s64 kernel_ns; |
d828199e | 1516 | u64 tsc_timestamp, host_tsc; |
0b79459b | 1517 | struct pvclock_vcpu_time_info guest_hv_clock; |
51d59c6b | 1518 | u8 pvclock_flags; |
d828199e MT |
1519 | bool use_master_clock; |
1520 | ||
1521 | kernel_ns = 0; | |
1522 | host_tsc = 0; | |
18068523 | 1523 | |
d828199e MT |
1524 | /* |
1525 | * If the host uses TSC clock, then passthrough TSC as stable | |
1526 | * to the guest. | |
1527 | */ | |
1528 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
1529 | use_master_clock = ka->use_master_clock; | |
1530 | if (use_master_clock) { | |
1531 | host_tsc = ka->master_cycle_now; | |
1532 | kernel_ns = ka->master_kernel_ns; | |
1533 | } | |
1534 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
c09664bb MT |
1535 | |
1536 | /* Keep irq disabled to prevent changes to the clock */ | |
1537 | local_irq_save(flags); | |
1538 | this_tsc_khz = __get_cpu_var(cpu_tsc_khz); | |
1539 | if (unlikely(this_tsc_khz == 0)) { | |
1540 | local_irq_restore(flags); | |
1541 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); | |
1542 | return 1; | |
1543 | } | |
d828199e MT |
1544 | if (!use_master_clock) { |
1545 | host_tsc = native_read_tsc(); | |
1546 | kernel_ns = get_kernel_ns(); | |
1547 | } | |
1548 | ||
1549 | tsc_timestamp = kvm_x86_ops->read_l1_tsc(v, host_tsc); | |
1550 | ||
c285545f ZA |
1551 | /* |
1552 | * We may have to catch up the TSC to match elapsed wall clock | |
1553 | * time for two reasons, even if kvmclock is used. | |
1554 | * 1) CPU could have been running below the maximum TSC rate | |
1555 | * 2) Broken TSC compensation resets the base at each VCPU | |
1556 | * entry to avoid unknown leaps of TSC even when running | |
1557 | * again on the same CPU. This may cause apparent elapsed | |
1558 | * time to disappear, and the guest to stand still or run | |
1559 | * very slowly. | |
1560 | */ | |
1561 | if (vcpu->tsc_catchup) { | |
1562 | u64 tsc = compute_guest_tsc(v, kernel_ns); | |
1563 | if (tsc > tsc_timestamp) { | |
f1e2b260 | 1564 | adjust_tsc_offset_guest(v, tsc - tsc_timestamp); |
c285545f ZA |
1565 | tsc_timestamp = tsc; |
1566 | } | |
50d0a0f9 GH |
1567 | } |
1568 | ||
18068523 GOC |
1569 | local_irq_restore(flags); |
1570 | ||
0b79459b | 1571 | if (!vcpu->pv_time_enabled) |
c285545f | 1572 | return 0; |
18068523 | 1573 | |
e48672fa | 1574 | if (unlikely(vcpu->hw_tsc_khz != this_tsc_khz)) { |
5f4e3f88 ZA |
1575 | kvm_get_time_scale(NSEC_PER_SEC / 1000, this_tsc_khz, |
1576 | &vcpu->hv_clock.tsc_shift, | |
1577 | &vcpu->hv_clock.tsc_to_system_mul); | |
e48672fa | 1578 | vcpu->hw_tsc_khz = this_tsc_khz; |
8cfdc000 ZA |
1579 | } |
1580 | ||
1581 | /* With all the info we got, fill in the values */ | |
1d5f066e | 1582 | vcpu->hv_clock.tsc_timestamp = tsc_timestamp; |
759379dd | 1583 | vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset; |
1d5f066e | 1584 | vcpu->last_kernel_ns = kernel_ns; |
28e4639a | 1585 | vcpu->last_guest_tsc = tsc_timestamp; |
51d59c6b | 1586 | |
18068523 GOC |
1587 | /* |
1588 | * The interface expects us to write an even number signaling that the | |
1589 | * update is finished. Since the guest won't see the intermediate | |
50d0a0f9 | 1590 | * state, we just increase by 2 at the end. |
18068523 | 1591 | */ |
50d0a0f9 | 1592 | vcpu->hv_clock.version += 2; |
18068523 | 1593 | |
0b79459b AH |
1594 | if (unlikely(kvm_read_guest_cached(v->kvm, &vcpu->pv_time, |
1595 | &guest_hv_clock, sizeof(guest_hv_clock)))) | |
1596 | return 0; | |
78c0337a MT |
1597 | |
1598 | /* retain PVCLOCK_GUEST_STOPPED if set in guest copy */ | |
0b79459b | 1599 | pvclock_flags = (guest_hv_clock.flags & PVCLOCK_GUEST_STOPPED); |
78c0337a MT |
1600 | |
1601 | if (vcpu->pvclock_set_guest_stopped_request) { | |
1602 | pvclock_flags |= PVCLOCK_GUEST_STOPPED; | |
1603 | vcpu->pvclock_set_guest_stopped_request = false; | |
1604 | } | |
1605 | ||
d828199e MT |
1606 | /* If the host uses TSC clocksource, then it is stable */ |
1607 | if (use_master_clock) | |
1608 | pvclock_flags |= PVCLOCK_TSC_STABLE_BIT; | |
1609 | ||
78c0337a MT |
1610 | vcpu->hv_clock.flags = pvclock_flags; |
1611 | ||
0b79459b AH |
1612 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
1613 | &vcpu->hv_clock, | |
1614 | sizeof(vcpu->hv_clock)); | |
8cfdc000 | 1615 | return 0; |
c8076604 GH |
1616 | } |
1617 | ||
0061d53d MT |
1618 | /* |
1619 | * kvmclock updates which are isolated to a given vcpu, such as | |
1620 | * vcpu->cpu migration, should not allow system_timestamp from | |
1621 | * the rest of the vcpus to remain static. Otherwise ntp frequency | |
1622 | * correction applies to one vcpu's system_timestamp but not | |
1623 | * the others. | |
1624 | * | |
1625 | * So in those cases, request a kvmclock update for all vcpus. | |
1626 | * The worst case for a remote vcpu to update its kvmclock | |
1627 | * is then bounded by maximum nohz sleep latency. | |
1628 | */ | |
1629 | ||
1630 | static void kvm_gen_kvmclock_update(struct kvm_vcpu *v) | |
1631 | { | |
1632 | int i; | |
1633 | struct kvm *kvm = v->kvm; | |
1634 | struct kvm_vcpu *vcpu; | |
1635 | ||
1636 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1637 | set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); | |
1638 | kvm_vcpu_kick(vcpu); | |
1639 | } | |
1640 | } | |
1641 | ||
9ba075a6 AK |
1642 | static bool msr_mtrr_valid(unsigned msr) |
1643 | { | |
1644 | switch (msr) { | |
1645 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: | |
1646 | case MSR_MTRRfix64K_00000: | |
1647 | case MSR_MTRRfix16K_80000: | |
1648 | case MSR_MTRRfix16K_A0000: | |
1649 | case MSR_MTRRfix4K_C0000: | |
1650 | case MSR_MTRRfix4K_C8000: | |
1651 | case MSR_MTRRfix4K_D0000: | |
1652 | case MSR_MTRRfix4K_D8000: | |
1653 | case MSR_MTRRfix4K_E0000: | |
1654 | case MSR_MTRRfix4K_E8000: | |
1655 | case MSR_MTRRfix4K_F0000: | |
1656 | case MSR_MTRRfix4K_F8000: | |
1657 | case MSR_MTRRdefType: | |
1658 | case MSR_IA32_CR_PAT: | |
1659 | return true; | |
1660 | case 0x2f8: | |
1661 | return true; | |
1662 | } | |
1663 | return false; | |
1664 | } | |
1665 | ||
d6289b93 MT |
1666 | static bool valid_pat_type(unsigned t) |
1667 | { | |
1668 | return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */ | |
1669 | } | |
1670 | ||
1671 | static bool valid_mtrr_type(unsigned t) | |
1672 | { | |
1673 | return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ | |
1674 | } | |
1675 | ||
1676 | static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1677 | { | |
1678 | int i; | |
1679 | ||
1680 | if (!msr_mtrr_valid(msr)) | |
1681 | return false; | |
1682 | ||
1683 | if (msr == MSR_IA32_CR_PAT) { | |
1684 | for (i = 0; i < 8; i++) | |
1685 | if (!valid_pat_type((data >> (i * 8)) & 0xff)) | |
1686 | return false; | |
1687 | return true; | |
1688 | } else if (msr == MSR_MTRRdefType) { | |
1689 | if (data & ~0xcff) | |
1690 | return false; | |
1691 | return valid_mtrr_type(data & 0xff); | |
1692 | } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) { | |
1693 | for (i = 0; i < 8 ; i++) | |
1694 | if (!valid_mtrr_type((data >> (i * 8)) & 0xff)) | |
1695 | return false; | |
1696 | return true; | |
1697 | } | |
1698 | ||
1699 | /* variable MTRRs */ | |
1700 | return valid_mtrr_type(data & 0xff); | |
1701 | } | |
1702 | ||
9ba075a6 AK |
1703 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1704 | { | |
0bed3b56 SY |
1705 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
1706 | ||
d6289b93 | 1707 | if (!mtrr_valid(vcpu, msr, data)) |
9ba075a6 AK |
1708 | return 1; |
1709 | ||
0bed3b56 SY |
1710 | if (msr == MSR_MTRRdefType) { |
1711 | vcpu->arch.mtrr_state.def_type = data; | |
1712 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; | |
1713 | } else if (msr == MSR_MTRRfix64K_00000) | |
1714 | p[0] = data; | |
1715 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
1716 | p[1 + msr - MSR_MTRRfix16K_80000] = data; | |
1717 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
1718 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; | |
1719 | else if (msr == MSR_IA32_CR_PAT) | |
1720 | vcpu->arch.pat = data; | |
1721 | else { /* Variable MTRRs */ | |
1722 | int idx, is_mtrr_mask; | |
1723 | u64 *pt; | |
1724 | ||
1725 | idx = (msr - 0x200) / 2; | |
1726 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
1727 | if (!is_mtrr_mask) | |
1728 | pt = | |
1729 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
1730 | else | |
1731 | pt = | |
1732 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
1733 | *pt = data; | |
1734 | } | |
1735 | ||
1736 | kvm_mmu_reset_context(vcpu); | |
9ba075a6 AK |
1737 | return 0; |
1738 | } | |
15c4a640 | 1739 | |
890ca9ae | 1740 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
15c4a640 | 1741 | { |
890ca9ae HY |
1742 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1743 | unsigned bank_num = mcg_cap & 0xff; | |
1744 | ||
15c4a640 | 1745 | switch (msr) { |
15c4a640 | 1746 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 1747 | vcpu->arch.mcg_status = data; |
15c4a640 | 1748 | break; |
c7ac679c | 1749 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1750 | if (!(mcg_cap & MCG_CTL_P)) |
1751 | return 1; | |
1752 | if (data != 0 && data != ~(u64)0) | |
1753 | return -1; | |
1754 | vcpu->arch.mcg_ctl = data; | |
1755 | break; | |
1756 | default: | |
1757 | if (msr >= MSR_IA32_MC0_CTL && | |
1758 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1759 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
114be429 AP |
1760 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
1761 | * some Linux kernels though clear bit 10 in bank 4 to | |
1762 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore | |
1763 | * this to avoid an uncatched #GP in the guest | |
1764 | */ | |
890ca9ae | 1765 | if ((offset & 0x3) == 0 && |
114be429 | 1766 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
890ca9ae HY |
1767 | return -1; |
1768 | vcpu->arch.mce_banks[offset] = data; | |
1769 | break; | |
1770 | } | |
1771 | return 1; | |
1772 | } | |
1773 | return 0; | |
1774 | } | |
1775 | ||
ffde22ac ES |
1776 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
1777 | { | |
1778 | struct kvm *kvm = vcpu->kvm; | |
1779 | int lm = is_long_mode(vcpu); | |
1780 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
1781 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
1782 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
1783 | : kvm->arch.xen_hvm_config.blob_size_32; | |
1784 | u32 page_num = data & ~PAGE_MASK; | |
1785 | u64 page_addr = data & PAGE_MASK; | |
1786 | u8 *page; | |
1787 | int r; | |
1788 | ||
1789 | r = -E2BIG; | |
1790 | if (page_num >= blob_size) | |
1791 | goto out; | |
1792 | r = -ENOMEM; | |
ff5c2c03 SL |
1793 | page = memdup_user(blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE); |
1794 | if (IS_ERR(page)) { | |
1795 | r = PTR_ERR(page); | |
ffde22ac | 1796 | goto out; |
ff5c2c03 | 1797 | } |
ffde22ac ES |
1798 | if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE)) |
1799 | goto out_free; | |
1800 | r = 0; | |
1801 | out_free: | |
1802 | kfree(page); | |
1803 | out: | |
1804 | return r; | |
1805 | } | |
1806 | ||
55cd8e5a GN |
1807 | static bool kvm_hv_hypercall_enabled(struct kvm *kvm) |
1808 | { | |
1809 | return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE; | |
1810 | } | |
1811 | ||
1812 | static bool kvm_hv_msr_partition_wide(u32 msr) | |
1813 | { | |
1814 | bool r = false; | |
1815 | switch (msr) { | |
1816 | case HV_X64_MSR_GUEST_OS_ID: | |
1817 | case HV_X64_MSR_HYPERCALL: | |
e984097b VR |
1818 | case HV_X64_MSR_REFERENCE_TSC: |
1819 | case HV_X64_MSR_TIME_REF_COUNT: | |
55cd8e5a GN |
1820 | r = true; |
1821 | break; | |
1822 | } | |
1823 | ||
1824 | return r; | |
1825 | } | |
1826 | ||
1827 | static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1828 | { | |
1829 | struct kvm *kvm = vcpu->kvm; | |
1830 | ||
1831 | switch (msr) { | |
1832 | case HV_X64_MSR_GUEST_OS_ID: | |
1833 | kvm->arch.hv_guest_os_id = data; | |
1834 | /* setting guest os id to zero disables hypercall page */ | |
1835 | if (!kvm->arch.hv_guest_os_id) | |
1836 | kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE; | |
1837 | break; | |
1838 | case HV_X64_MSR_HYPERCALL: { | |
1839 | u64 gfn; | |
1840 | unsigned long addr; | |
1841 | u8 instructions[4]; | |
1842 | ||
1843 | /* if guest os id is not set hypercall should remain disabled */ | |
1844 | if (!kvm->arch.hv_guest_os_id) | |
1845 | break; | |
1846 | if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) { | |
1847 | kvm->arch.hv_hypercall = data; | |
1848 | break; | |
1849 | } | |
1850 | gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT; | |
1851 | addr = gfn_to_hva(kvm, gfn); | |
1852 | if (kvm_is_error_hva(addr)) | |
1853 | return 1; | |
1854 | kvm_x86_ops->patch_hypercall(vcpu, instructions); | |
1855 | ((unsigned char *)instructions)[3] = 0xc3; /* ret */ | |
8b0cedff | 1856 | if (__copy_to_user((void __user *)addr, instructions, 4)) |
55cd8e5a GN |
1857 | return 1; |
1858 | kvm->arch.hv_hypercall = data; | |
b94b64c9 | 1859 | mark_page_dirty(kvm, gfn); |
55cd8e5a GN |
1860 | break; |
1861 | } | |
e984097b VR |
1862 | case HV_X64_MSR_REFERENCE_TSC: { |
1863 | u64 gfn; | |
1864 | HV_REFERENCE_TSC_PAGE tsc_ref; | |
1865 | memset(&tsc_ref, 0, sizeof(tsc_ref)); | |
1866 | kvm->arch.hv_tsc_page = data; | |
1867 | if (!(data & HV_X64_MSR_TSC_REFERENCE_ENABLE)) | |
1868 | break; | |
1869 | gfn = data >> HV_X64_MSR_TSC_REFERENCE_ADDRESS_SHIFT; | |
1870 | if (kvm_write_guest(kvm, data, | |
1871 | &tsc_ref, sizeof(tsc_ref))) | |
1872 | return 1; | |
1873 | mark_page_dirty(kvm, gfn); | |
1874 | break; | |
1875 | } | |
55cd8e5a | 1876 | default: |
a737f256 CD |
1877 | vcpu_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " |
1878 | "data 0x%llx\n", msr, data); | |
55cd8e5a GN |
1879 | return 1; |
1880 | } | |
1881 | return 0; | |
1882 | } | |
1883 | ||
1884 | static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1885 | { | |
10388a07 GN |
1886 | switch (msr) { |
1887 | case HV_X64_MSR_APIC_ASSIST_PAGE: { | |
b3af1e88 | 1888 | u64 gfn; |
10388a07 | 1889 | unsigned long addr; |
55cd8e5a | 1890 | |
10388a07 GN |
1891 | if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) { |
1892 | vcpu->arch.hv_vapic = data; | |
1893 | break; | |
1894 | } | |
b3af1e88 VR |
1895 | gfn = data >> HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT; |
1896 | addr = gfn_to_hva(vcpu->kvm, gfn); | |
10388a07 GN |
1897 | if (kvm_is_error_hva(addr)) |
1898 | return 1; | |
8b0cedff | 1899 | if (__clear_user((void __user *)addr, PAGE_SIZE)) |
10388a07 GN |
1900 | return 1; |
1901 | vcpu->arch.hv_vapic = data; | |
b3af1e88 | 1902 | mark_page_dirty(vcpu->kvm, gfn); |
10388a07 GN |
1903 | break; |
1904 | } | |
1905 | case HV_X64_MSR_EOI: | |
1906 | return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data); | |
1907 | case HV_X64_MSR_ICR: | |
1908 | return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data); | |
1909 | case HV_X64_MSR_TPR: | |
1910 | return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data); | |
1911 | default: | |
a737f256 CD |
1912 | vcpu_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " |
1913 | "data 0x%llx\n", msr, data); | |
10388a07 GN |
1914 | return 1; |
1915 | } | |
1916 | ||
1917 | return 0; | |
55cd8e5a GN |
1918 | } |
1919 | ||
344d9588 GN |
1920 | static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data) |
1921 | { | |
1922 | gpa_t gpa = data & ~0x3f; | |
1923 | ||
4a969980 | 1924 | /* Bits 2:5 are reserved, Should be zero */ |
6adba527 | 1925 | if (data & 0x3c) |
344d9588 GN |
1926 | return 1; |
1927 | ||
1928 | vcpu->arch.apf.msr_val = data; | |
1929 | ||
1930 | if (!(data & KVM_ASYNC_PF_ENABLED)) { | |
1931 | kvm_clear_async_pf_completion_queue(vcpu); | |
1932 | kvm_async_pf_hash_reset(vcpu); | |
1933 | return 0; | |
1934 | } | |
1935 | ||
8f964525 AH |
1936 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.apf.data, gpa, |
1937 | sizeof(u32))) | |
344d9588 GN |
1938 | return 1; |
1939 | ||
6adba527 | 1940 | vcpu->arch.apf.send_user_only = !(data & KVM_ASYNC_PF_SEND_ALWAYS); |
344d9588 GN |
1941 | kvm_async_pf_wakeup_all(vcpu); |
1942 | return 0; | |
1943 | } | |
1944 | ||
12f9a48f GC |
1945 | static void kvmclock_reset(struct kvm_vcpu *vcpu) |
1946 | { | |
0b79459b | 1947 | vcpu->arch.pv_time_enabled = false; |
12f9a48f GC |
1948 | } |
1949 | ||
c9aaa895 GC |
1950 | static void accumulate_steal_time(struct kvm_vcpu *vcpu) |
1951 | { | |
1952 | u64 delta; | |
1953 | ||
1954 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
1955 | return; | |
1956 | ||
1957 | delta = current->sched_info.run_delay - vcpu->arch.st.last_steal; | |
1958 | vcpu->arch.st.last_steal = current->sched_info.run_delay; | |
1959 | vcpu->arch.st.accum_steal = delta; | |
1960 | } | |
1961 | ||
1962 | static void record_steal_time(struct kvm_vcpu *vcpu) | |
1963 | { | |
1964 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
1965 | return; | |
1966 | ||
1967 | if (unlikely(kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, | |
1968 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)))) | |
1969 | return; | |
1970 | ||
1971 | vcpu->arch.st.steal.steal += vcpu->arch.st.accum_steal; | |
1972 | vcpu->arch.st.steal.version += 2; | |
1973 | vcpu->arch.st.accum_steal = 0; | |
1974 | ||
1975 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, | |
1976 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); | |
1977 | } | |
1978 | ||
8fe8ab46 | 1979 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
15c4a640 | 1980 | { |
5753785f | 1981 | bool pr = false; |
8fe8ab46 WA |
1982 | u32 msr = msr_info->index; |
1983 | u64 data = msr_info->data; | |
5753785f | 1984 | |
15c4a640 | 1985 | switch (msr) { |
2e32b719 BP |
1986 | case MSR_AMD64_NB_CFG: |
1987 | case MSR_IA32_UCODE_REV: | |
1988 | case MSR_IA32_UCODE_WRITE: | |
1989 | case MSR_VM_HSAVE_PA: | |
1990 | case MSR_AMD64_PATCH_LOADER: | |
1991 | case MSR_AMD64_BU_CFG2: | |
1992 | break; | |
1993 | ||
15c4a640 | 1994 | case MSR_EFER: |
b69e8cae | 1995 | return set_efer(vcpu, data); |
8f1589d9 AP |
1996 | case MSR_K7_HWCR: |
1997 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
82494028 | 1998 | data &= ~(u64)0x100; /* ignore ignne emulation enable */ |
a223c313 | 1999 | data &= ~(u64)0x8; /* ignore TLB cache disable */ |
8f1589d9 | 2000 | if (data != 0) { |
a737f256 CD |
2001 | vcpu_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", |
2002 | data); | |
8f1589d9 AP |
2003 | return 1; |
2004 | } | |
15c4a640 | 2005 | break; |
f7c6d140 AP |
2006 | case MSR_FAM10H_MMIO_CONF_BASE: |
2007 | if (data != 0) { | |
a737f256 CD |
2008 | vcpu_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " |
2009 | "0x%llx\n", data); | |
f7c6d140 AP |
2010 | return 1; |
2011 | } | |
15c4a640 | 2012 | break; |
b5e2fec0 AG |
2013 | case MSR_IA32_DEBUGCTLMSR: |
2014 | if (!data) { | |
2015 | /* We support the non-activated case already */ | |
2016 | break; | |
2017 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
2018 | /* Values other than LBR and BTF are vendor-specific, | |
2019 | thus reserved and should throw a #GP */ | |
2020 | return 1; | |
2021 | } | |
a737f256 CD |
2022 | vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", |
2023 | __func__, data); | |
b5e2fec0 | 2024 | break; |
9ba075a6 AK |
2025 | case 0x200 ... 0x2ff: |
2026 | return set_msr_mtrr(vcpu, msr, data); | |
15c4a640 | 2027 | case MSR_IA32_APICBASE: |
58cb628d | 2028 | return kvm_set_apic_base(vcpu, msr_info); |
0105d1a5 GN |
2029 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
2030 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
a3e06bbe LJ |
2031 | case MSR_IA32_TSCDEADLINE: |
2032 | kvm_set_lapic_tscdeadline_msr(vcpu, data); | |
2033 | break; | |
ba904635 WA |
2034 | case MSR_IA32_TSC_ADJUST: |
2035 | if (guest_cpuid_has_tsc_adjust(vcpu)) { | |
2036 | if (!msr_info->host_initiated) { | |
2037 | u64 adj = data - vcpu->arch.ia32_tsc_adjust_msr; | |
2038 | kvm_x86_ops->adjust_tsc_offset(vcpu, adj, true); | |
2039 | } | |
2040 | vcpu->arch.ia32_tsc_adjust_msr = data; | |
2041 | } | |
2042 | break; | |
15c4a640 | 2043 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 2044 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 2045 | break; |
11c6bffa | 2046 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
2047 | case MSR_KVM_WALL_CLOCK: |
2048 | vcpu->kvm->arch.wall_clock = data; | |
2049 | kvm_write_wall_clock(vcpu->kvm, data); | |
2050 | break; | |
11c6bffa | 2051 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 | 2052 | case MSR_KVM_SYSTEM_TIME: { |
0b79459b | 2053 | u64 gpa_offset; |
12f9a48f | 2054 | kvmclock_reset(vcpu); |
18068523 GOC |
2055 | |
2056 | vcpu->arch.time = data; | |
0061d53d | 2057 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
18068523 GOC |
2058 | |
2059 | /* we verify if the enable bit is set... */ | |
2060 | if (!(data & 1)) | |
2061 | break; | |
2062 | ||
0b79459b | 2063 | gpa_offset = data & ~(PAGE_MASK | 1); |
18068523 | 2064 | |
0b79459b | 2065 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, |
8f964525 AH |
2066 | &vcpu->arch.pv_time, data & ~1ULL, |
2067 | sizeof(struct pvclock_vcpu_time_info))) | |
0b79459b AH |
2068 | vcpu->arch.pv_time_enabled = false; |
2069 | else | |
2070 | vcpu->arch.pv_time_enabled = true; | |
32cad84f | 2071 | |
18068523 GOC |
2072 | break; |
2073 | } | |
344d9588 GN |
2074 | case MSR_KVM_ASYNC_PF_EN: |
2075 | if (kvm_pv_enable_async_pf(vcpu, data)) | |
2076 | return 1; | |
2077 | break; | |
c9aaa895 GC |
2078 | case MSR_KVM_STEAL_TIME: |
2079 | ||
2080 | if (unlikely(!sched_info_on())) | |
2081 | return 1; | |
2082 | ||
2083 | if (data & KVM_STEAL_RESERVED_MASK) | |
2084 | return 1; | |
2085 | ||
2086 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.st.stime, | |
8f964525 AH |
2087 | data & KVM_STEAL_VALID_BITS, |
2088 | sizeof(struct kvm_steal_time))) | |
c9aaa895 GC |
2089 | return 1; |
2090 | ||
2091 | vcpu->arch.st.msr_val = data; | |
2092 | ||
2093 | if (!(data & KVM_MSR_ENABLED)) | |
2094 | break; | |
2095 | ||
2096 | vcpu->arch.st.last_steal = current->sched_info.run_delay; | |
2097 | ||
2098 | preempt_disable(); | |
2099 | accumulate_steal_time(vcpu); | |
2100 | preempt_enable(); | |
2101 | ||
2102 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); | |
2103 | ||
2104 | break; | |
ae7a2a3f MT |
2105 | case MSR_KVM_PV_EOI_EN: |
2106 | if (kvm_lapic_enable_pv_eoi(vcpu, data)) | |
2107 | return 1; | |
2108 | break; | |
c9aaa895 | 2109 | |
890ca9ae HY |
2110 | case MSR_IA32_MCG_CTL: |
2111 | case MSR_IA32_MCG_STATUS: | |
2112 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
2113 | return set_msr_mce(vcpu, msr, data); | |
71db6023 AP |
2114 | |
2115 | /* Performance counters are not protected by a CPUID bit, | |
2116 | * so we should check all of them in the generic path for the sake of | |
2117 | * cross vendor migration. | |
2118 | * Writing a zero into the event select MSRs disables them, | |
2119 | * which we perfectly emulate ;-). Any other value should be at least | |
2120 | * reported, some guests depend on them. | |
2121 | */ | |
71db6023 AP |
2122 | case MSR_K7_EVNTSEL0: |
2123 | case MSR_K7_EVNTSEL1: | |
2124 | case MSR_K7_EVNTSEL2: | |
2125 | case MSR_K7_EVNTSEL3: | |
2126 | if (data != 0) | |
a737f256 CD |
2127 | vcpu_unimpl(vcpu, "unimplemented perfctr wrmsr: " |
2128 | "0x%x data 0x%llx\n", msr, data); | |
71db6023 AP |
2129 | break; |
2130 | /* at least RHEL 4 unconditionally writes to the perfctr registers, | |
2131 | * so we ignore writes to make it happy. | |
2132 | */ | |
71db6023 AP |
2133 | case MSR_K7_PERFCTR0: |
2134 | case MSR_K7_PERFCTR1: | |
2135 | case MSR_K7_PERFCTR2: | |
2136 | case MSR_K7_PERFCTR3: | |
a737f256 CD |
2137 | vcpu_unimpl(vcpu, "unimplemented perfctr wrmsr: " |
2138 | "0x%x data 0x%llx\n", msr, data); | |
71db6023 | 2139 | break; |
5753785f GN |
2140 | case MSR_P6_PERFCTR0: |
2141 | case MSR_P6_PERFCTR1: | |
2142 | pr = true; | |
2143 | case MSR_P6_EVNTSEL0: | |
2144 | case MSR_P6_EVNTSEL1: | |
2145 | if (kvm_pmu_msr(vcpu, msr)) | |
afd80d85 | 2146 | return kvm_pmu_set_msr(vcpu, msr_info); |
5753785f GN |
2147 | |
2148 | if (pr || data != 0) | |
a737f256 CD |
2149 | vcpu_unimpl(vcpu, "disabled perfctr wrmsr: " |
2150 | "0x%x data 0x%llx\n", msr, data); | |
5753785f | 2151 | break; |
84e0cefa JS |
2152 | case MSR_K7_CLK_CTL: |
2153 | /* | |
2154 | * Ignore all writes to this no longer documented MSR. | |
2155 | * Writes are only relevant for old K7 processors, | |
2156 | * all pre-dating SVM, but a recommended workaround from | |
4a969980 | 2157 | * AMD for these chips. It is possible to specify the |
84e0cefa JS |
2158 | * affected processor models on the command line, hence |
2159 | * the need to ignore the workaround. | |
2160 | */ | |
2161 | break; | |
55cd8e5a GN |
2162 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
2163 | if (kvm_hv_msr_partition_wide(msr)) { | |
2164 | int r; | |
2165 | mutex_lock(&vcpu->kvm->lock); | |
2166 | r = set_msr_hyperv_pw(vcpu, msr, data); | |
2167 | mutex_unlock(&vcpu->kvm->lock); | |
2168 | return r; | |
2169 | } else | |
2170 | return set_msr_hyperv(vcpu, msr, data); | |
2171 | break; | |
91c9c3ed | 2172 | case MSR_IA32_BBL_CR_CTL3: |
2173 | /* Drop writes to this legacy MSR -- see rdmsr | |
2174 | * counterpart for further detail. | |
2175 | */ | |
a737f256 | 2176 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", msr, data); |
91c9c3ed | 2177 | break; |
2b036c6b BO |
2178 | case MSR_AMD64_OSVW_ID_LENGTH: |
2179 | if (!guest_cpuid_has_osvw(vcpu)) | |
2180 | return 1; | |
2181 | vcpu->arch.osvw.length = data; | |
2182 | break; | |
2183 | case MSR_AMD64_OSVW_STATUS: | |
2184 | if (!guest_cpuid_has_osvw(vcpu)) | |
2185 | return 1; | |
2186 | vcpu->arch.osvw.status = data; | |
2187 | break; | |
15c4a640 | 2188 | default: |
ffde22ac ES |
2189 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
2190 | return xen_hvm_config(vcpu, data); | |
f5132b01 | 2191 | if (kvm_pmu_msr(vcpu, msr)) |
afd80d85 | 2192 | return kvm_pmu_set_msr(vcpu, msr_info); |
ed85c068 | 2193 | if (!ignore_msrs) { |
a737f256 CD |
2194 | vcpu_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", |
2195 | msr, data); | |
ed85c068 AP |
2196 | return 1; |
2197 | } else { | |
a737f256 CD |
2198 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", |
2199 | msr, data); | |
ed85c068 AP |
2200 | break; |
2201 | } | |
15c4a640 CO |
2202 | } |
2203 | return 0; | |
2204 | } | |
2205 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
2206 | ||
2207 | ||
2208 | /* | |
2209 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
2210 | * Returns 0 on success, non-0 otherwise. | |
2211 | * Assumes vcpu_load() was already called. | |
2212 | */ | |
2213 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
2214 | { | |
2215 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); | |
2216 | } | |
2217 | ||
9ba075a6 AK |
2218 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
2219 | { | |
0bed3b56 SY |
2220 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
2221 | ||
9ba075a6 AK |
2222 | if (!msr_mtrr_valid(msr)) |
2223 | return 1; | |
2224 | ||
0bed3b56 SY |
2225 | if (msr == MSR_MTRRdefType) |
2226 | *pdata = vcpu->arch.mtrr_state.def_type + | |
2227 | (vcpu->arch.mtrr_state.enabled << 10); | |
2228 | else if (msr == MSR_MTRRfix64K_00000) | |
2229 | *pdata = p[0]; | |
2230 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
2231 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; | |
2232 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
2233 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; | |
2234 | else if (msr == MSR_IA32_CR_PAT) | |
2235 | *pdata = vcpu->arch.pat; | |
2236 | else { /* Variable MTRRs */ | |
2237 | int idx, is_mtrr_mask; | |
2238 | u64 *pt; | |
2239 | ||
2240 | idx = (msr - 0x200) / 2; | |
2241 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
2242 | if (!is_mtrr_mask) | |
2243 | pt = | |
2244 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
2245 | else | |
2246 | pt = | |
2247 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
2248 | *pdata = *pt; | |
2249 | } | |
2250 | ||
9ba075a6 AK |
2251 | return 0; |
2252 | } | |
2253 | ||
890ca9ae | 2254 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
2255 | { |
2256 | u64 data; | |
890ca9ae HY |
2257 | u64 mcg_cap = vcpu->arch.mcg_cap; |
2258 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
2259 | |
2260 | switch (msr) { | |
15c4a640 CO |
2261 | case MSR_IA32_P5_MC_ADDR: |
2262 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
2263 | data = 0; |
2264 | break; | |
15c4a640 | 2265 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
2266 | data = vcpu->arch.mcg_cap; |
2267 | break; | |
c7ac679c | 2268 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
2269 | if (!(mcg_cap & MCG_CTL_P)) |
2270 | return 1; | |
2271 | data = vcpu->arch.mcg_ctl; | |
2272 | break; | |
2273 | case MSR_IA32_MCG_STATUS: | |
2274 | data = vcpu->arch.mcg_status; | |
2275 | break; | |
2276 | default: | |
2277 | if (msr >= MSR_IA32_MC0_CTL && | |
2278 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
2279 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
2280 | data = vcpu->arch.mce_banks[offset]; | |
2281 | break; | |
2282 | } | |
2283 | return 1; | |
2284 | } | |
2285 | *pdata = data; | |
2286 | return 0; | |
2287 | } | |
2288 | ||
55cd8e5a GN |
2289 | static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
2290 | { | |
2291 | u64 data = 0; | |
2292 | struct kvm *kvm = vcpu->kvm; | |
2293 | ||
2294 | switch (msr) { | |
2295 | case HV_X64_MSR_GUEST_OS_ID: | |
2296 | data = kvm->arch.hv_guest_os_id; | |
2297 | break; | |
2298 | case HV_X64_MSR_HYPERCALL: | |
2299 | data = kvm->arch.hv_hypercall; | |
2300 | break; | |
e984097b VR |
2301 | case HV_X64_MSR_TIME_REF_COUNT: { |
2302 | data = | |
2303 | div_u64(get_kernel_ns() + kvm->arch.kvmclock_offset, 100); | |
2304 | break; | |
2305 | } | |
2306 | case HV_X64_MSR_REFERENCE_TSC: | |
2307 | data = kvm->arch.hv_tsc_page; | |
2308 | break; | |
55cd8e5a | 2309 | default: |
a737f256 | 2310 | vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); |
55cd8e5a GN |
2311 | return 1; |
2312 | } | |
2313 | ||
2314 | *pdata = data; | |
2315 | return 0; | |
2316 | } | |
2317 | ||
2318 | static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) | |
2319 | { | |
2320 | u64 data = 0; | |
2321 | ||
2322 | switch (msr) { | |
2323 | case HV_X64_MSR_VP_INDEX: { | |
2324 | int r; | |
2325 | struct kvm_vcpu *v; | |
2326 | kvm_for_each_vcpu(r, v, vcpu->kvm) | |
2327 | if (v == vcpu) | |
2328 | data = r; | |
2329 | break; | |
2330 | } | |
10388a07 GN |
2331 | case HV_X64_MSR_EOI: |
2332 | return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata); | |
2333 | case HV_X64_MSR_ICR: | |
2334 | return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata); | |
2335 | case HV_X64_MSR_TPR: | |
2336 | return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata); | |
14fa67ee | 2337 | case HV_X64_MSR_APIC_ASSIST_PAGE: |
d1613ad5 MW |
2338 | data = vcpu->arch.hv_vapic; |
2339 | break; | |
55cd8e5a | 2340 | default: |
a737f256 | 2341 | vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); |
55cd8e5a GN |
2342 | return 1; |
2343 | } | |
2344 | *pdata = data; | |
2345 | return 0; | |
2346 | } | |
2347 | ||
890ca9ae HY |
2348 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
2349 | { | |
2350 | u64 data; | |
2351 | ||
2352 | switch (msr) { | |
890ca9ae | 2353 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 2354 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
2355 | case MSR_IA32_DEBUGCTLMSR: |
2356 | case MSR_IA32_LASTBRANCHFROMIP: | |
2357 | case MSR_IA32_LASTBRANCHTOIP: | |
2358 | case MSR_IA32_LASTINTFROMIP: | |
2359 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd JSR |
2360 | case MSR_K8_SYSCFG: |
2361 | case MSR_K7_HWCR: | |
61a6bd67 | 2362 | case MSR_VM_HSAVE_PA: |
9e699624 | 2363 | case MSR_K7_EVNTSEL0: |
1f3ee616 | 2364 | case MSR_K7_PERFCTR0: |
1fdbd48c | 2365 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 2366 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 2367 | case MSR_FAM10H_MMIO_CONF_BASE: |
2e32b719 | 2368 | case MSR_AMD64_BU_CFG2: |
15c4a640 CO |
2369 | data = 0; |
2370 | break; | |
5753785f GN |
2371 | case MSR_P6_PERFCTR0: |
2372 | case MSR_P6_PERFCTR1: | |
2373 | case MSR_P6_EVNTSEL0: | |
2374 | case MSR_P6_EVNTSEL1: | |
2375 | if (kvm_pmu_msr(vcpu, msr)) | |
2376 | return kvm_pmu_get_msr(vcpu, msr, pdata); | |
2377 | data = 0; | |
2378 | break; | |
742bc670 MT |
2379 | case MSR_IA32_UCODE_REV: |
2380 | data = 0x100000000ULL; | |
2381 | break; | |
9ba075a6 AK |
2382 | case MSR_MTRRcap: |
2383 | data = 0x500 | KVM_NR_VAR_MTRR; | |
2384 | break; | |
2385 | case 0x200 ... 0x2ff: | |
2386 | return get_msr_mtrr(vcpu, msr, pdata); | |
15c4a640 CO |
2387 | case 0xcd: /* fsb frequency */ |
2388 | data = 3; | |
2389 | break; | |
7b914098 JS |
2390 | /* |
2391 | * MSR_EBC_FREQUENCY_ID | |
2392 | * Conservative value valid for even the basic CPU models. | |
2393 | * Models 0,1: 000 in bits 23:21 indicating a bus speed of | |
2394 | * 100MHz, model 2 000 in bits 18:16 indicating 100MHz, | |
2395 | * and 266MHz for model 3, or 4. Set Core Clock | |
2396 | * Frequency to System Bus Frequency Ratio to 1 (bits | |
2397 | * 31:24) even though these are only valid for CPU | |
2398 | * models > 2, however guests may end up dividing or | |
2399 | * multiplying by zero otherwise. | |
2400 | */ | |
2401 | case MSR_EBC_FREQUENCY_ID: | |
2402 | data = 1 << 24; | |
2403 | break; | |
15c4a640 CO |
2404 | case MSR_IA32_APICBASE: |
2405 | data = kvm_get_apic_base(vcpu); | |
2406 | break; | |
0105d1a5 GN |
2407 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
2408 | return kvm_x2apic_msr_read(vcpu, msr, pdata); | |
2409 | break; | |
a3e06bbe LJ |
2410 | case MSR_IA32_TSCDEADLINE: |
2411 | data = kvm_get_lapic_tscdeadline_msr(vcpu); | |
2412 | break; | |
ba904635 WA |
2413 | case MSR_IA32_TSC_ADJUST: |
2414 | data = (u64)vcpu->arch.ia32_tsc_adjust_msr; | |
2415 | break; | |
15c4a640 | 2416 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 2417 | data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 2418 | break; |
847f0ad8 AG |
2419 | case MSR_IA32_PERF_STATUS: |
2420 | /* TSC increment by tick */ | |
2421 | data = 1000ULL; | |
2422 | /* CPU multiplier */ | |
2423 | data |= (((uint64_t)4ULL) << 40); | |
2424 | break; | |
15c4a640 | 2425 | case MSR_EFER: |
f6801dff | 2426 | data = vcpu->arch.efer; |
15c4a640 | 2427 | break; |
18068523 | 2428 | case MSR_KVM_WALL_CLOCK: |
11c6bffa | 2429 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
2430 | data = vcpu->kvm->arch.wall_clock; |
2431 | break; | |
2432 | case MSR_KVM_SYSTEM_TIME: | |
11c6bffa | 2433 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 GOC |
2434 | data = vcpu->arch.time; |
2435 | break; | |
344d9588 GN |
2436 | case MSR_KVM_ASYNC_PF_EN: |
2437 | data = vcpu->arch.apf.msr_val; | |
2438 | break; | |
c9aaa895 GC |
2439 | case MSR_KVM_STEAL_TIME: |
2440 | data = vcpu->arch.st.msr_val; | |
2441 | break; | |
1d92128f MT |
2442 | case MSR_KVM_PV_EOI_EN: |
2443 | data = vcpu->arch.pv_eoi.msr_val; | |
2444 | break; | |
890ca9ae HY |
2445 | case MSR_IA32_P5_MC_ADDR: |
2446 | case MSR_IA32_P5_MC_TYPE: | |
2447 | case MSR_IA32_MCG_CAP: | |
2448 | case MSR_IA32_MCG_CTL: | |
2449 | case MSR_IA32_MCG_STATUS: | |
2450 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
2451 | return get_msr_mce(vcpu, msr, pdata); | |
84e0cefa JS |
2452 | case MSR_K7_CLK_CTL: |
2453 | /* | |
2454 | * Provide expected ramp-up count for K7. All other | |
2455 | * are set to zero, indicating minimum divisors for | |
2456 | * every field. | |
2457 | * | |
2458 | * This prevents guest kernels on AMD host with CPU | |
2459 | * type 6, model 8 and higher from exploding due to | |
2460 | * the rdmsr failing. | |
2461 | */ | |
2462 | data = 0x20000000; | |
2463 | break; | |
55cd8e5a GN |
2464 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
2465 | if (kvm_hv_msr_partition_wide(msr)) { | |
2466 | int r; | |
2467 | mutex_lock(&vcpu->kvm->lock); | |
2468 | r = get_msr_hyperv_pw(vcpu, msr, pdata); | |
2469 | mutex_unlock(&vcpu->kvm->lock); | |
2470 | return r; | |
2471 | } else | |
2472 | return get_msr_hyperv(vcpu, msr, pdata); | |
2473 | break; | |
91c9c3ed | 2474 | case MSR_IA32_BBL_CR_CTL3: |
2475 | /* This legacy MSR exists but isn't fully documented in current | |
2476 | * silicon. It is however accessed by winxp in very narrow | |
2477 | * scenarios where it sets bit #19, itself documented as | |
2478 | * a "reserved" bit. Best effort attempt to source coherent | |
2479 | * read data here should the balance of the register be | |
2480 | * interpreted by the guest: | |
2481 | * | |
2482 | * L2 cache control register 3: 64GB range, 256KB size, | |
2483 | * enabled, latency 0x1, configured | |
2484 | */ | |
2485 | data = 0xbe702111; | |
2486 | break; | |
2b036c6b BO |
2487 | case MSR_AMD64_OSVW_ID_LENGTH: |
2488 | if (!guest_cpuid_has_osvw(vcpu)) | |
2489 | return 1; | |
2490 | data = vcpu->arch.osvw.length; | |
2491 | break; | |
2492 | case MSR_AMD64_OSVW_STATUS: | |
2493 | if (!guest_cpuid_has_osvw(vcpu)) | |
2494 | return 1; | |
2495 | data = vcpu->arch.osvw.status; | |
2496 | break; | |
15c4a640 | 2497 | default: |
f5132b01 GN |
2498 | if (kvm_pmu_msr(vcpu, msr)) |
2499 | return kvm_pmu_get_msr(vcpu, msr, pdata); | |
ed85c068 | 2500 | if (!ignore_msrs) { |
a737f256 | 2501 | vcpu_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); |
ed85c068 AP |
2502 | return 1; |
2503 | } else { | |
a737f256 | 2504 | vcpu_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr); |
ed85c068 AP |
2505 | data = 0; |
2506 | } | |
2507 | break; | |
15c4a640 CO |
2508 | } |
2509 | *pdata = data; | |
2510 | return 0; | |
2511 | } | |
2512 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
2513 | ||
313a3dc7 CO |
2514 | /* |
2515 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
2516 | * | |
2517 | * @return number of msrs set successfully. | |
2518 | */ | |
2519 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
2520 | struct kvm_msr_entry *entries, | |
2521 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2522 | unsigned index, u64 *data)) | |
2523 | { | |
f656ce01 | 2524 | int i, idx; |
313a3dc7 | 2525 | |
f656ce01 | 2526 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
313a3dc7 CO |
2527 | for (i = 0; i < msrs->nmsrs; ++i) |
2528 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2529 | break; | |
f656ce01 | 2530 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 2531 | |
313a3dc7 CO |
2532 | return i; |
2533 | } | |
2534 | ||
2535 | /* | |
2536 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2537 | * | |
2538 | * @return number of msrs set successfully. | |
2539 | */ | |
2540 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
2541 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2542 | unsigned index, u64 *data), | |
2543 | int writeback) | |
2544 | { | |
2545 | struct kvm_msrs msrs; | |
2546 | struct kvm_msr_entry *entries; | |
2547 | int r, n; | |
2548 | unsigned size; | |
2549 | ||
2550 | r = -EFAULT; | |
2551 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
2552 | goto out; | |
2553 | ||
2554 | r = -E2BIG; | |
2555 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2556 | goto out; | |
2557 | ||
313a3dc7 | 2558 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; |
ff5c2c03 SL |
2559 | entries = memdup_user(user_msrs->entries, size); |
2560 | if (IS_ERR(entries)) { | |
2561 | r = PTR_ERR(entries); | |
313a3dc7 | 2562 | goto out; |
ff5c2c03 | 2563 | } |
313a3dc7 CO |
2564 | |
2565 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
2566 | if (r < 0) | |
2567 | goto out_free; | |
2568 | ||
2569 | r = -EFAULT; | |
2570 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2571 | goto out_free; | |
2572 | ||
2573 | r = n; | |
2574 | ||
2575 | out_free: | |
7a73c028 | 2576 | kfree(entries); |
313a3dc7 CO |
2577 | out: |
2578 | return r; | |
2579 | } | |
2580 | ||
018d00d2 ZX |
2581 | int kvm_dev_ioctl_check_extension(long ext) |
2582 | { | |
2583 | int r; | |
2584 | ||
2585 | switch (ext) { | |
2586 | case KVM_CAP_IRQCHIP: | |
2587 | case KVM_CAP_HLT: | |
2588 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 2589 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 2590 | case KVM_CAP_EXT_CPUID: |
9c15bb1d | 2591 | case KVM_CAP_EXT_EMUL_CPUID: |
c8076604 | 2592 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 2593 | case KVM_CAP_PIT: |
a28e4f5a | 2594 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 2595 | case KVM_CAP_MP_STATE: |
ed848624 | 2596 | case KVM_CAP_SYNC_MMU: |
a355c85c | 2597 | case KVM_CAP_USER_NMI: |
52d939a0 | 2598 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 2599 | case KVM_CAP_IRQ_INJECT_STATUS: |
721eecbf | 2600 | case KVM_CAP_IRQFD: |
d34e6b17 | 2601 | case KVM_CAP_IOEVENTFD: |
c5ff41ce | 2602 | case KVM_CAP_PIT2: |
e9f42757 | 2603 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 2604 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 2605 | case KVM_CAP_XEN_HVM: |
afbcf7ab | 2606 | case KVM_CAP_ADJUST_CLOCK: |
3cfc3092 | 2607 | case KVM_CAP_VCPU_EVENTS: |
55cd8e5a | 2608 | case KVM_CAP_HYPERV: |
10388a07 | 2609 | case KVM_CAP_HYPERV_VAPIC: |
c25bc163 | 2610 | case KVM_CAP_HYPERV_SPIN: |
ab9f4ecb | 2611 | case KVM_CAP_PCI_SEGMENT: |
a1efbe77 | 2612 | case KVM_CAP_DEBUGREGS: |
d2be1651 | 2613 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
2d5b5a66 | 2614 | case KVM_CAP_XSAVE: |
344d9588 | 2615 | case KVM_CAP_ASYNC_PF: |
92a1f12d | 2616 | case KVM_CAP_GET_TSC_KHZ: |
1c0b28c2 | 2617 | case KVM_CAP_KVMCLOCK_CTRL: |
4d8b81ab | 2618 | case KVM_CAP_READONLY_MEM: |
5f66b620 | 2619 | case KVM_CAP_HYPERV_TIME: |
2a5bab10 AW |
2620 | #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT |
2621 | case KVM_CAP_ASSIGN_DEV_IRQ: | |
2622 | case KVM_CAP_PCI_2_3: | |
2623 | #endif | |
018d00d2 ZX |
2624 | r = 1; |
2625 | break; | |
542472b5 LV |
2626 | case KVM_CAP_COALESCED_MMIO: |
2627 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
2628 | break; | |
774ead3a AK |
2629 | case KVM_CAP_VAPIC: |
2630 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
2631 | break; | |
f725230a | 2632 | case KVM_CAP_NR_VCPUS: |
8c3ba334 SL |
2633 | r = KVM_SOFT_MAX_VCPUS; |
2634 | break; | |
2635 | case KVM_CAP_MAX_VCPUS: | |
f725230a AK |
2636 | r = KVM_MAX_VCPUS; |
2637 | break; | |
a988b910 | 2638 | case KVM_CAP_NR_MEMSLOTS: |
bbacc0c1 | 2639 | r = KVM_USER_MEM_SLOTS; |
a988b910 | 2640 | break; |
a68a6a72 MT |
2641 | case KVM_CAP_PV_MMU: /* obsolete */ |
2642 | r = 0; | |
2f333bcb | 2643 | break; |
4cee4b72 | 2644 | #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT |
62c476c7 | 2645 | case KVM_CAP_IOMMU: |
a1b60c1c | 2646 | r = iommu_present(&pci_bus_type); |
62c476c7 | 2647 | break; |
4cee4b72 | 2648 | #endif |
890ca9ae HY |
2649 | case KVM_CAP_MCE: |
2650 | r = KVM_MAX_MCE_BANKS; | |
2651 | break; | |
2d5b5a66 SY |
2652 | case KVM_CAP_XCRS: |
2653 | r = cpu_has_xsave; | |
2654 | break; | |
92a1f12d JR |
2655 | case KVM_CAP_TSC_CONTROL: |
2656 | r = kvm_has_tsc_control; | |
2657 | break; | |
4d25a066 JK |
2658 | case KVM_CAP_TSC_DEADLINE_TIMER: |
2659 | r = boot_cpu_has(X86_FEATURE_TSC_DEADLINE_TIMER); | |
2660 | break; | |
018d00d2 ZX |
2661 | default: |
2662 | r = 0; | |
2663 | break; | |
2664 | } | |
2665 | return r; | |
2666 | ||
2667 | } | |
2668 | ||
043405e1 CO |
2669 | long kvm_arch_dev_ioctl(struct file *filp, |
2670 | unsigned int ioctl, unsigned long arg) | |
2671 | { | |
2672 | void __user *argp = (void __user *)arg; | |
2673 | long r; | |
2674 | ||
2675 | switch (ioctl) { | |
2676 | case KVM_GET_MSR_INDEX_LIST: { | |
2677 | struct kvm_msr_list __user *user_msr_list = argp; | |
2678 | struct kvm_msr_list msr_list; | |
2679 | unsigned n; | |
2680 | ||
2681 | r = -EFAULT; | |
2682 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
2683 | goto out; | |
2684 | n = msr_list.nmsrs; | |
2685 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); | |
2686 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) | |
2687 | goto out; | |
2688 | r = -E2BIG; | |
e125e7b6 | 2689 | if (n < msr_list.nmsrs) |
043405e1 CO |
2690 | goto out; |
2691 | r = -EFAULT; | |
2692 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
2693 | num_msrs_to_save * sizeof(u32))) | |
2694 | goto out; | |
e125e7b6 | 2695 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 CO |
2696 | &emulated_msrs, |
2697 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
2698 | goto out; | |
2699 | r = 0; | |
2700 | break; | |
2701 | } | |
9c15bb1d BP |
2702 | case KVM_GET_SUPPORTED_CPUID: |
2703 | case KVM_GET_EMULATED_CPUID: { | |
674eea0f AK |
2704 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
2705 | struct kvm_cpuid2 cpuid; | |
2706 | ||
2707 | r = -EFAULT; | |
2708 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2709 | goto out; | |
9c15bb1d BP |
2710 | |
2711 | r = kvm_dev_ioctl_get_cpuid(&cpuid, cpuid_arg->entries, | |
2712 | ioctl); | |
674eea0f AK |
2713 | if (r) |
2714 | goto out; | |
2715 | ||
2716 | r = -EFAULT; | |
2717 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2718 | goto out; | |
2719 | r = 0; | |
2720 | break; | |
2721 | } | |
890ca9ae HY |
2722 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
2723 | u64 mce_cap; | |
2724 | ||
2725 | mce_cap = KVM_MCE_CAP_SUPPORTED; | |
2726 | r = -EFAULT; | |
2727 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) | |
2728 | goto out; | |
2729 | r = 0; | |
2730 | break; | |
2731 | } | |
043405e1 CO |
2732 | default: |
2733 | r = -EINVAL; | |
2734 | } | |
2735 | out: | |
2736 | return r; | |
2737 | } | |
2738 | ||
f5f48ee1 SY |
2739 | static void wbinvd_ipi(void *garbage) |
2740 | { | |
2741 | wbinvd(); | |
2742 | } | |
2743 | ||
2744 | static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
2745 | { | |
e0f0bbc5 | 2746 | return kvm_arch_has_noncoherent_dma(vcpu->kvm); |
f5f48ee1 SY |
2747 | } |
2748 | ||
313a3dc7 CO |
2749 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
2750 | { | |
f5f48ee1 SY |
2751 | /* Address WBINVD may be executed by guest */ |
2752 | if (need_emulate_wbinvd(vcpu)) { | |
2753 | if (kvm_x86_ops->has_wbinvd_exit()) | |
2754 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
2755 | else if (vcpu->cpu != -1 && vcpu->cpu != cpu) | |
2756 | smp_call_function_single(vcpu->cpu, | |
2757 | wbinvd_ipi, NULL, 1); | |
2758 | } | |
2759 | ||
313a3dc7 | 2760 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
8f6055cb | 2761 | |
0dd6a6ed ZA |
2762 | /* Apply any externally detected TSC adjustments (due to suspend) */ |
2763 | if (unlikely(vcpu->arch.tsc_offset_adjustment)) { | |
2764 | adjust_tsc_offset_host(vcpu, vcpu->arch.tsc_offset_adjustment); | |
2765 | vcpu->arch.tsc_offset_adjustment = 0; | |
2766 | set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); | |
2767 | } | |
8f6055cb | 2768 | |
48434c20 | 2769 | if (unlikely(vcpu->cpu != cpu) || check_tsc_unstable()) { |
6f526ec5 ZA |
2770 | s64 tsc_delta = !vcpu->arch.last_host_tsc ? 0 : |
2771 | native_read_tsc() - vcpu->arch.last_host_tsc; | |
e48672fa ZA |
2772 | if (tsc_delta < 0) |
2773 | mark_tsc_unstable("KVM discovered backwards TSC"); | |
c285545f | 2774 | if (check_tsc_unstable()) { |
b183aa58 ZA |
2775 | u64 offset = kvm_x86_ops->compute_tsc_offset(vcpu, |
2776 | vcpu->arch.last_guest_tsc); | |
2777 | kvm_x86_ops->write_tsc_offset(vcpu, offset); | |
c285545f | 2778 | vcpu->arch.tsc_catchup = 1; |
c285545f | 2779 | } |
d98d07ca MT |
2780 | /* |
2781 | * On a host with synchronized TSC, there is no need to update | |
2782 | * kvmclock on vcpu->cpu migration | |
2783 | */ | |
2784 | if (!vcpu->kvm->arch.use_master_clock || vcpu->cpu == -1) | |
0061d53d | 2785 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
c285545f ZA |
2786 | if (vcpu->cpu != cpu) |
2787 | kvm_migrate_timers(vcpu); | |
e48672fa | 2788 | vcpu->cpu = cpu; |
6b7d7e76 | 2789 | } |
c9aaa895 GC |
2790 | |
2791 | accumulate_steal_time(vcpu); | |
2792 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); | |
313a3dc7 CO |
2793 | } |
2794 | ||
2795 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
2796 | { | |
02daab21 | 2797 | kvm_x86_ops->vcpu_put(vcpu); |
1c11e713 | 2798 | kvm_put_guest_fpu(vcpu); |
6f526ec5 | 2799 | vcpu->arch.last_host_tsc = native_read_tsc(); |
313a3dc7 CO |
2800 | } |
2801 | ||
313a3dc7 CO |
2802 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
2803 | struct kvm_lapic_state *s) | |
2804 | { | |
5a71785d | 2805 | kvm_x86_ops->sync_pir_to_irr(vcpu); |
ad312c7c | 2806 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
2807 | |
2808 | return 0; | |
2809 | } | |
2810 | ||
2811 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
2812 | struct kvm_lapic_state *s) | |
2813 | { | |
64eb0620 | 2814 | kvm_apic_post_state_restore(vcpu, s); |
cb142eb7 | 2815 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
2816 | |
2817 | return 0; | |
2818 | } | |
2819 | ||
f77bc6a4 ZX |
2820 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2821 | struct kvm_interrupt *irq) | |
2822 | { | |
02cdb50f | 2823 | if (irq->irq >= KVM_NR_INTERRUPTS) |
f77bc6a4 ZX |
2824 | return -EINVAL; |
2825 | if (irqchip_in_kernel(vcpu->kvm)) | |
2826 | return -ENXIO; | |
f77bc6a4 | 2827 | |
66fd3f7f | 2828 | kvm_queue_interrupt(vcpu, irq->irq, false); |
3842d135 | 2829 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f77bc6a4 | 2830 | |
f77bc6a4 ZX |
2831 | return 0; |
2832 | } | |
2833 | ||
c4abb7c9 JK |
2834 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
2835 | { | |
c4abb7c9 | 2836 | kvm_inject_nmi(vcpu); |
c4abb7c9 JK |
2837 | |
2838 | return 0; | |
2839 | } | |
2840 | ||
b209749f AK |
2841 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
2842 | struct kvm_tpr_access_ctl *tac) | |
2843 | { | |
2844 | if (tac->flags) | |
2845 | return -EINVAL; | |
2846 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
2847 | return 0; | |
2848 | } | |
2849 | ||
890ca9ae HY |
2850 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
2851 | u64 mcg_cap) | |
2852 | { | |
2853 | int r; | |
2854 | unsigned bank_num = mcg_cap & 0xff, bank; | |
2855 | ||
2856 | r = -EINVAL; | |
a9e38c3e | 2857 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae HY |
2858 | goto out; |
2859 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) | |
2860 | goto out; | |
2861 | r = 0; | |
2862 | vcpu->arch.mcg_cap = mcg_cap; | |
2863 | /* Init IA32_MCG_CTL to all 1s */ | |
2864 | if (mcg_cap & MCG_CTL_P) | |
2865 | vcpu->arch.mcg_ctl = ~(u64)0; | |
2866 | /* Init IA32_MCi_CTL to all 1s */ | |
2867 | for (bank = 0; bank < bank_num; bank++) | |
2868 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
2869 | out: | |
2870 | return r; | |
2871 | } | |
2872 | ||
2873 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
2874 | struct kvm_x86_mce *mce) | |
2875 | { | |
2876 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
2877 | unsigned bank_num = mcg_cap & 0xff; | |
2878 | u64 *banks = vcpu->arch.mce_banks; | |
2879 | ||
2880 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
2881 | return -EINVAL; | |
2882 | /* | |
2883 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
2884 | * reporting is disabled | |
2885 | */ | |
2886 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
2887 | vcpu->arch.mcg_ctl != ~(u64)0) | |
2888 | return 0; | |
2889 | banks += 4 * mce->bank; | |
2890 | /* | |
2891 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
2892 | * reporting is disabled for the bank | |
2893 | */ | |
2894 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
2895 | return 0; | |
2896 | if (mce->status & MCI_STATUS_UC) { | |
2897 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 2898 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
a8eeb04a | 2899 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
890ca9ae HY |
2900 | return 0; |
2901 | } | |
2902 | if (banks[1] & MCI_STATUS_VAL) | |
2903 | mce->status |= MCI_STATUS_OVER; | |
2904 | banks[2] = mce->addr; | |
2905 | banks[3] = mce->misc; | |
2906 | vcpu->arch.mcg_status = mce->mcg_status; | |
2907 | banks[1] = mce->status; | |
2908 | kvm_queue_exception(vcpu, MC_VECTOR); | |
2909 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
2910 | || !(banks[1] & MCI_STATUS_UC)) { | |
2911 | if (banks[1] & MCI_STATUS_VAL) | |
2912 | mce->status |= MCI_STATUS_OVER; | |
2913 | banks[2] = mce->addr; | |
2914 | banks[3] = mce->misc; | |
2915 | banks[1] = mce->status; | |
2916 | } else | |
2917 | banks[1] |= MCI_STATUS_OVER; | |
2918 | return 0; | |
2919 | } | |
2920 | ||
3cfc3092 JK |
2921 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
2922 | struct kvm_vcpu_events *events) | |
2923 | { | |
7460fb4a | 2924 | process_nmi(vcpu); |
03b82a30 JK |
2925 | events->exception.injected = |
2926 | vcpu->arch.exception.pending && | |
2927 | !kvm_exception_is_soft(vcpu->arch.exception.nr); | |
3cfc3092 JK |
2928 | events->exception.nr = vcpu->arch.exception.nr; |
2929 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
97e69aa6 | 2930 | events->exception.pad = 0; |
3cfc3092 JK |
2931 | events->exception.error_code = vcpu->arch.exception.error_code; |
2932 | ||
03b82a30 JK |
2933 | events->interrupt.injected = |
2934 | vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft; | |
3cfc3092 | 2935 | events->interrupt.nr = vcpu->arch.interrupt.nr; |
03b82a30 | 2936 | events->interrupt.soft = 0; |
48005f64 JK |
2937 | events->interrupt.shadow = |
2938 | kvm_x86_ops->get_interrupt_shadow(vcpu, | |
2939 | KVM_X86_SHADOW_INT_MOV_SS | KVM_X86_SHADOW_INT_STI); | |
3cfc3092 JK |
2940 | |
2941 | events->nmi.injected = vcpu->arch.nmi_injected; | |
7460fb4a | 2942 | events->nmi.pending = vcpu->arch.nmi_pending != 0; |
3cfc3092 | 2943 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); |
97e69aa6 | 2944 | events->nmi.pad = 0; |
3cfc3092 | 2945 | |
66450a21 | 2946 | events->sipi_vector = 0; /* never valid when reporting to user space */ |
3cfc3092 | 2947 | |
dab4b911 | 2948 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 | 2949 | | KVM_VCPUEVENT_VALID_SHADOW); |
97e69aa6 | 2950 | memset(&events->reserved, 0, sizeof(events->reserved)); |
3cfc3092 JK |
2951 | } |
2952 | ||
2953 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, | |
2954 | struct kvm_vcpu_events *events) | |
2955 | { | |
dab4b911 | 2956 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 JK |
2957 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
2958 | | KVM_VCPUEVENT_VALID_SHADOW)) | |
3cfc3092 JK |
2959 | return -EINVAL; |
2960 | ||
7460fb4a | 2961 | process_nmi(vcpu); |
3cfc3092 JK |
2962 | vcpu->arch.exception.pending = events->exception.injected; |
2963 | vcpu->arch.exception.nr = events->exception.nr; | |
2964 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
2965 | vcpu->arch.exception.error_code = events->exception.error_code; | |
2966 | ||
2967 | vcpu->arch.interrupt.pending = events->interrupt.injected; | |
2968 | vcpu->arch.interrupt.nr = events->interrupt.nr; | |
2969 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
48005f64 JK |
2970 | if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) |
2971 | kvm_x86_ops->set_interrupt_shadow(vcpu, | |
2972 | events->interrupt.shadow); | |
3cfc3092 JK |
2973 | |
2974 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
2975 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
2976 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
2977 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
2978 | ||
66450a21 JK |
2979 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR && |
2980 | kvm_vcpu_has_lapic(vcpu)) | |
2981 | vcpu->arch.apic->sipi_vector = events->sipi_vector; | |
3cfc3092 | 2982 | |
3842d135 AK |
2983 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
2984 | ||
3cfc3092 JK |
2985 | return 0; |
2986 | } | |
2987 | ||
a1efbe77 JK |
2988 | static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, |
2989 | struct kvm_debugregs *dbgregs) | |
2990 | { | |
73aaf249 JK |
2991 | unsigned long val; |
2992 | ||
a1efbe77 | 2993 | memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db)); |
73aaf249 JK |
2994 | _kvm_get_dr(vcpu, 6, &val); |
2995 | dbgregs->dr6 = val; | |
a1efbe77 JK |
2996 | dbgregs->dr7 = vcpu->arch.dr7; |
2997 | dbgregs->flags = 0; | |
97e69aa6 | 2998 | memset(&dbgregs->reserved, 0, sizeof(dbgregs->reserved)); |
a1efbe77 JK |
2999 | } |
3000 | ||
3001 | static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, | |
3002 | struct kvm_debugregs *dbgregs) | |
3003 | { | |
3004 | if (dbgregs->flags) | |
3005 | return -EINVAL; | |
3006 | ||
a1efbe77 JK |
3007 | memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db)); |
3008 | vcpu->arch.dr6 = dbgregs->dr6; | |
73aaf249 | 3009 | kvm_update_dr6(vcpu); |
a1efbe77 | 3010 | vcpu->arch.dr7 = dbgregs->dr7; |
9926c9fd | 3011 | kvm_update_dr7(vcpu); |
a1efbe77 | 3012 | |
a1efbe77 JK |
3013 | return 0; |
3014 | } | |
3015 | ||
2d5b5a66 SY |
3016 | static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu, |
3017 | struct kvm_xsave *guest_xsave) | |
3018 | { | |
4344ee98 | 3019 | if (cpu_has_xsave) { |
2d5b5a66 SY |
3020 | memcpy(guest_xsave->region, |
3021 | &vcpu->arch.guest_fpu.state->xsave, | |
4344ee98 PB |
3022 | vcpu->arch.guest_xstate_size); |
3023 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] &= | |
3024 | vcpu->arch.guest_supported_xcr0 | XSTATE_FPSSE; | |
3025 | } else { | |
2d5b5a66 SY |
3026 | memcpy(guest_xsave->region, |
3027 | &vcpu->arch.guest_fpu.state->fxsave, | |
3028 | sizeof(struct i387_fxsave_struct)); | |
3029 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] = | |
3030 | XSTATE_FPSSE; | |
3031 | } | |
3032 | } | |
3033 | ||
3034 | static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu, | |
3035 | struct kvm_xsave *guest_xsave) | |
3036 | { | |
3037 | u64 xstate_bv = | |
3038 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)]; | |
3039 | ||
d7876f1b PB |
3040 | if (cpu_has_xsave) { |
3041 | /* | |
3042 | * Here we allow setting states that are not present in | |
3043 | * CPUID leaf 0xD, index 0, EDX:EAX. This is for compatibility | |
3044 | * with old userspace. | |
3045 | */ | |
3046 | if (xstate_bv & ~KVM_SUPPORTED_XCR0) | |
3047 | return -EINVAL; | |
3048 | if (xstate_bv & ~host_xcr0) | |
3049 | return -EINVAL; | |
2d5b5a66 | 3050 | memcpy(&vcpu->arch.guest_fpu.state->xsave, |
4344ee98 | 3051 | guest_xsave->region, vcpu->arch.guest_xstate_size); |
d7876f1b | 3052 | } else { |
2d5b5a66 SY |
3053 | if (xstate_bv & ~XSTATE_FPSSE) |
3054 | return -EINVAL; | |
3055 | memcpy(&vcpu->arch.guest_fpu.state->fxsave, | |
3056 | guest_xsave->region, sizeof(struct i387_fxsave_struct)); | |
3057 | } | |
3058 | return 0; | |
3059 | } | |
3060 | ||
3061 | static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu, | |
3062 | struct kvm_xcrs *guest_xcrs) | |
3063 | { | |
3064 | if (!cpu_has_xsave) { | |
3065 | guest_xcrs->nr_xcrs = 0; | |
3066 | return; | |
3067 | } | |
3068 | ||
3069 | guest_xcrs->nr_xcrs = 1; | |
3070 | guest_xcrs->flags = 0; | |
3071 | guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK; | |
3072 | guest_xcrs->xcrs[0].value = vcpu->arch.xcr0; | |
3073 | } | |
3074 | ||
3075 | static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu, | |
3076 | struct kvm_xcrs *guest_xcrs) | |
3077 | { | |
3078 | int i, r = 0; | |
3079 | ||
3080 | if (!cpu_has_xsave) | |
3081 | return -EINVAL; | |
3082 | ||
3083 | if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags) | |
3084 | return -EINVAL; | |
3085 | ||
3086 | for (i = 0; i < guest_xcrs->nr_xcrs; i++) | |
3087 | /* Only support XCR0 currently */ | |
c67a04cb | 3088 | if (guest_xcrs->xcrs[i].xcr == XCR_XFEATURE_ENABLED_MASK) { |
2d5b5a66 | 3089 | r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK, |
c67a04cb | 3090 | guest_xcrs->xcrs[i].value); |
2d5b5a66 SY |
3091 | break; |
3092 | } | |
3093 | if (r) | |
3094 | r = -EINVAL; | |
3095 | return r; | |
3096 | } | |
3097 | ||
1c0b28c2 EM |
3098 | /* |
3099 | * kvm_set_guest_paused() indicates to the guest kernel that it has been | |
3100 | * stopped by the hypervisor. This function will be called from the host only. | |
3101 | * EINVAL is returned when the host attempts to set the flag for a guest that | |
3102 | * does not support pv clocks. | |
3103 | */ | |
3104 | static int kvm_set_guest_paused(struct kvm_vcpu *vcpu) | |
3105 | { | |
0b79459b | 3106 | if (!vcpu->arch.pv_time_enabled) |
1c0b28c2 | 3107 | return -EINVAL; |
51d59c6b | 3108 | vcpu->arch.pvclock_set_guest_stopped_request = true; |
1c0b28c2 EM |
3109 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
3110 | return 0; | |
3111 | } | |
3112 | ||
313a3dc7 CO |
3113 | long kvm_arch_vcpu_ioctl(struct file *filp, |
3114 | unsigned int ioctl, unsigned long arg) | |
3115 | { | |
3116 | struct kvm_vcpu *vcpu = filp->private_data; | |
3117 | void __user *argp = (void __user *)arg; | |
3118 | int r; | |
d1ac91d8 AK |
3119 | union { |
3120 | struct kvm_lapic_state *lapic; | |
3121 | struct kvm_xsave *xsave; | |
3122 | struct kvm_xcrs *xcrs; | |
3123 | void *buffer; | |
3124 | } u; | |
3125 | ||
3126 | u.buffer = NULL; | |
313a3dc7 CO |
3127 | switch (ioctl) { |
3128 | case KVM_GET_LAPIC: { | |
2204ae3c MT |
3129 | r = -EINVAL; |
3130 | if (!vcpu->arch.apic) | |
3131 | goto out; | |
d1ac91d8 | 3132 | u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 3133 | |
b772ff36 | 3134 | r = -ENOMEM; |
d1ac91d8 | 3135 | if (!u.lapic) |
b772ff36 | 3136 | goto out; |
d1ac91d8 | 3137 | r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3138 | if (r) |
3139 | goto out; | |
3140 | r = -EFAULT; | |
d1ac91d8 | 3141 | if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
3142 | goto out; |
3143 | r = 0; | |
3144 | break; | |
3145 | } | |
3146 | case KVM_SET_LAPIC: { | |
2204ae3c MT |
3147 | r = -EINVAL; |
3148 | if (!vcpu->arch.apic) | |
3149 | goto out; | |
ff5c2c03 | 3150 | u.lapic = memdup_user(argp, sizeof(*u.lapic)); |
18595411 GC |
3151 | if (IS_ERR(u.lapic)) |
3152 | return PTR_ERR(u.lapic); | |
ff5c2c03 | 3153 | |
d1ac91d8 | 3154 | r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3155 | break; |
3156 | } | |
f77bc6a4 ZX |
3157 | case KVM_INTERRUPT: { |
3158 | struct kvm_interrupt irq; | |
3159 | ||
3160 | r = -EFAULT; | |
3161 | if (copy_from_user(&irq, argp, sizeof irq)) | |
3162 | goto out; | |
3163 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
f77bc6a4 ZX |
3164 | break; |
3165 | } | |
c4abb7c9 JK |
3166 | case KVM_NMI: { |
3167 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
c4abb7c9 JK |
3168 | break; |
3169 | } | |
313a3dc7 CO |
3170 | case KVM_SET_CPUID: { |
3171 | struct kvm_cpuid __user *cpuid_arg = argp; | |
3172 | struct kvm_cpuid cpuid; | |
3173 | ||
3174 | r = -EFAULT; | |
3175 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3176 | goto out; | |
3177 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
313a3dc7 CO |
3178 | break; |
3179 | } | |
07716717 DK |
3180 | case KVM_SET_CPUID2: { |
3181 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3182 | struct kvm_cpuid2 cpuid; | |
3183 | ||
3184 | r = -EFAULT; | |
3185 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3186 | goto out; | |
3187 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 3188 | cpuid_arg->entries); |
07716717 DK |
3189 | break; |
3190 | } | |
3191 | case KVM_GET_CPUID2: { | |
3192 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3193 | struct kvm_cpuid2 cpuid; | |
3194 | ||
3195 | r = -EFAULT; | |
3196 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3197 | goto out; | |
3198 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 3199 | cpuid_arg->entries); |
07716717 DK |
3200 | if (r) |
3201 | goto out; | |
3202 | r = -EFAULT; | |
3203 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
3204 | goto out; | |
3205 | r = 0; | |
3206 | break; | |
3207 | } | |
313a3dc7 CO |
3208 | case KVM_GET_MSRS: |
3209 | r = msr_io(vcpu, argp, kvm_get_msr, 1); | |
3210 | break; | |
3211 | case KVM_SET_MSRS: | |
3212 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
3213 | break; | |
b209749f AK |
3214 | case KVM_TPR_ACCESS_REPORTING: { |
3215 | struct kvm_tpr_access_ctl tac; | |
3216 | ||
3217 | r = -EFAULT; | |
3218 | if (copy_from_user(&tac, argp, sizeof tac)) | |
3219 | goto out; | |
3220 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
3221 | if (r) | |
3222 | goto out; | |
3223 | r = -EFAULT; | |
3224 | if (copy_to_user(argp, &tac, sizeof tac)) | |
3225 | goto out; | |
3226 | r = 0; | |
3227 | break; | |
3228 | }; | |
b93463aa AK |
3229 | case KVM_SET_VAPIC_ADDR: { |
3230 | struct kvm_vapic_addr va; | |
3231 | ||
3232 | r = -EINVAL; | |
3233 | if (!irqchip_in_kernel(vcpu->kvm)) | |
3234 | goto out; | |
3235 | r = -EFAULT; | |
3236 | if (copy_from_user(&va, argp, sizeof va)) | |
3237 | goto out; | |
fda4e2e8 | 3238 | r = kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); |
b93463aa AK |
3239 | break; |
3240 | } | |
890ca9ae HY |
3241 | case KVM_X86_SETUP_MCE: { |
3242 | u64 mcg_cap; | |
3243 | ||
3244 | r = -EFAULT; | |
3245 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
3246 | goto out; | |
3247 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
3248 | break; | |
3249 | } | |
3250 | case KVM_X86_SET_MCE: { | |
3251 | struct kvm_x86_mce mce; | |
3252 | ||
3253 | r = -EFAULT; | |
3254 | if (copy_from_user(&mce, argp, sizeof mce)) | |
3255 | goto out; | |
3256 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
3257 | break; | |
3258 | } | |
3cfc3092 JK |
3259 | case KVM_GET_VCPU_EVENTS: { |
3260 | struct kvm_vcpu_events events; | |
3261 | ||
3262 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
3263 | ||
3264 | r = -EFAULT; | |
3265 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
3266 | break; | |
3267 | r = 0; | |
3268 | break; | |
3269 | } | |
3270 | case KVM_SET_VCPU_EVENTS: { | |
3271 | struct kvm_vcpu_events events; | |
3272 | ||
3273 | r = -EFAULT; | |
3274 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
3275 | break; | |
3276 | ||
3277 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
3278 | break; | |
3279 | } | |
a1efbe77 JK |
3280 | case KVM_GET_DEBUGREGS: { |
3281 | struct kvm_debugregs dbgregs; | |
3282 | ||
3283 | kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs); | |
3284 | ||
3285 | r = -EFAULT; | |
3286 | if (copy_to_user(argp, &dbgregs, | |
3287 | sizeof(struct kvm_debugregs))) | |
3288 | break; | |
3289 | r = 0; | |
3290 | break; | |
3291 | } | |
3292 | case KVM_SET_DEBUGREGS: { | |
3293 | struct kvm_debugregs dbgregs; | |
3294 | ||
3295 | r = -EFAULT; | |
3296 | if (copy_from_user(&dbgregs, argp, | |
3297 | sizeof(struct kvm_debugregs))) | |
3298 | break; | |
3299 | ||
3300 | r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs); | |
3301 | break; | |
3302 | } | |
2d5b5a66 | 3303 | case KVM_GET_XSAVE: { |
d1ac91d8 | 3304 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 3305 | r = -ENOMEM; |
d1ac91d8 | 3306 | if (!u.xsave) |
2d5b5a66 SY |
3307 | break; |
3308 | ||
d1ac91d8 | 3309 | kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3310 | |
3311 | r = -EFAULT; | |
d1ac91d8 | 3312 | if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
3313 | break; |
3314 | r = 0; | |
3315 | break; | |
3316 | } | |
3317 | case KVM_SET_XSAVE: { | |
ff5c2c03 | 3318 | u.xsave = memdup_user(argp, sizeof(*u.xsave)); |
18595411 GC |
3319 | if (IS_ERR(u.xsave)) |
3320 | return PTR_ERR(u.xsave); | |
2d5b5a66 | 3321 | |
d1ac91d8 | 3322 | r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3323 | break; |
3324 | } | |
3325 | case KVM_GET_XCRS: { | |
d1ac91d8 | 3326 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 3327 | r = -ENOMEM; |
d1ac91d8 | 3328 | if (!u.xcrs) |
2d5b5a66 SY |
3329 | break; |
3330 | ||
d1ac91d8 | 3331 | kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3332 | |
3333 | r = -EFAULT; | |
d1ac91d8 | 3334 | if (copy_to_user(argp, u.xcrs, |
2d5b5a66 SY |
3335 | sizeof(struct kvm_xcrs))) |
3336 | break; | |
3337 | r = 0; | |
3338 | break; | |
3339 | } | |
3340 | case KVM_SET_XCRS: { | |
ff5c2c03 | 3341 | u.xcrs = memdup_user(argp, sizeof(*u.xcrs)); |
18595411 GC |
3342 | if (IS_ERR(u.xcrs)) |
3343 | return PTR_ERR(u.xcrs); | |
2d5b5a66 | 3344 | |
d1ac91d8 | 3345 | r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3346 | break; |
3347 | } | |
92a1f12d JR |
3348 | case KVM_SET_TSC_KHZ: { |
3349 | u32 user_tsc_khz; | |
3350 | ||
3351 | r = -EINVAL; | |
92a1f12d JR |
3352 | user_tsc_khz = (u32)arg; |
3353 | ||
3354 | if (user_tsc_khz >= kvm_max_guest_tsc_khz) | |
3355 | goto out; | |
3356 | ||
cc578287 ZA |
3357 | if (user_tsc_khz == 0) |
3358 | user_tsc_khz = tsc_khz; | |
3359 | ||
3360 | kvm_set_tsc_khz(vcpu, user_tsc_khz); | |
92a1f12d JR |
3361 | |
3362 | r = 0; | |
3363 | goto out; | |
3364 | } | |
3365 | case KVM_GET_TSC_KHZ: { | |
cc578287 | 3366 | r = vcpu->arch.virtual_tsc_khz; |
92a1f12d JR |
3367 | goto out; |
3368 | } | |
1c0b28c2 EM |
3369 | case KVM_KVMCLOCK_CTRL: { |
3370 | r = kvm_set_guest_paused(vcpu); | |
3371 | goto out; | |
3372 | } | |
313a3dc7 CO |
3373 | default: |
3374 | r = -EINVAL; | |
3375 | } | |
3376 | out: | |
d1ac91d8 | 3377 | kfree(u.buffer); |
313a3dc7 CO |
3378 | return r; |
3379 | } | |
3380 | ||
5b1c1493 CO |
3381 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
3382 | { | |
3383 | return VM_FAULT_SIGBUS; | |
3384 | } | |
3385 | ||
1fe779f8 CO |
3386 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
3387 | { | |
3388 | int ret; | |
3389 | ||
3390 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
951179ce | 3391 | return -EINVAL; |
1fe779f8 CO |
3392 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); |
3393 | return ret; | |
3394 | } | |
3395 | ||
b927a3ce SY |
3396 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
3397 | u64 ident_addr) | |
3398 | { | |
3399 | kvm->arch.ept_identity_map_addr = ident_addr; | |
3400 | return 0; | |
3401 | } | |
3402 | ||
1fe779f8 CO |
3403 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
3404 | u32 kvm_nr_mmu_pages) | |
3405 | { | |
3406 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
3407 | return -EINVAL; | |
3408 | ||
79fac95e | 3409 | mutex_lock(&kvm->slots_lock); |
1fe779f8 CO |
3410 | |
3411 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 3412 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 3413 | |
79fac95e | 3414 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
3415 | return 0; |
3416 | } | |
3417 | ||
3418 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
3419 | { | |
39de71ec | 3420 | return kvm->arch.n_max_mmu_pages; |
1fe779f8 CO |
3421 | } |
3422 | ||
1fe779f8 CO |
3423 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
3424 | { | |
3425 | int r; | |
3426 | ||
3427 | r = 0; | |
3428 | switch (chip->chip_id) { | |
3429 | case KVM_IRQCHIP_PIC_MASTER: | |
3430 | memcpy(&chip->chip.pic, | |
3431 | &pic_irqchip(kvm)->pics[0], | |
3432 | sizeof(struct kvm_pic_state)); | |
3433 | break; | |
3434 | case KVM_IRQCHIP_PIC_SLAVE: | |
3435 | memcpy(&chip->chip.pic, | |
3436 | &pic_irqchip(kvm)->pics[1], | |
3437 | sizeof(struct kvm_pic_state)); | |
3438 | break; | |
3439 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 3440 | r = kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3441 | break; |
3442 | default: | |
3443 | r = -EINVAL; | |
3444 | break; | |
3445 | } | |
3446 | return r; | |
3447 | } | |
3448 | ||
3449 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
3450 | { | |
3451 | int r; | |
3452 | ||
3453 | r = 0; | |
3454 | switch (chip->chip_id) { | |
3455 | case KVM_IRQCHIP_PIC_MASTER: | |
f4f51050 | 3456 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3457 | memcpy(&pic_irqchip(kvm)->pics[0], |
3458 | &chip->chip.pic, | |
3459 | sizeof(struct kvm_pic_state)); | |
f4f51050 | 3460 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3461 | break; |
3462 | case KVM_IRQCHIP_PIC_SLAVE: | |
f4f51050 | 3463 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3464 | memcpy(&pic_irqchip(kvm)->pics[1], |
3465 | &chip->chip.pic, | |
3466 | sizeof(struct kvm_pic_state)); | |
f4f51050 | 3467 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3468 | break; |
3469 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 3470 | r = kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3471 | break; |
3472 | default: | |
3473 | r = -EINVAL; | |
3474 | break; | |
3475 | } | |
3476 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
3477 | return r; | |
3478 | } | |
3479 | ||
e0f63cb9 SY |
3480 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
3481 | { | |
3482 | int r = 0; | |
3483 | ||
894a9c55 | 3484 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 3485 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); |
894a9c55 | 3486 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
3487 | return r; |
3488 | } | |
3489 | ||
3490 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
3491 | { | |
3492 | int r = 0; | |
3493 | ||
894a9c55 | 3494 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 3495 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); |
e9f42757 BK |
3496 | kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0); |
3497 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
3498 | return r; | |
3499 | } | |
3500 | ||
3501 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3502 | { | |
3503 | int r = 0; | |
3504 | ||
3505 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
3506 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
3507 | sizeof(ps->channels)); | |
3508 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
3509 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
97e69aa6 | 3510 | memset(&ps->reserved, 0, sizeof(ps->reserved)); |
e9f42757 BK |
3511 | return r; |
3512 | } | |
3513 | ||
3514 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3515 | { | |
3516 | int r = 0, start = 0; | |
3517 | u32 prev_legacy, cur_legacy; | |
3518 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
3519 | prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
3520 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
3521 | if (!prev_legacy && cur_legacy) | |
3522 | start = 1; | |
3523 | memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels, | |
3524 | sizeof(kvm->arch.vpit->pit_state.channels)); | |
3525 | kvm->arch.vpit->pit_state.flags = ps->flags; | |
3526 | kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start); | |
894a9c55 | 3527 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
3528 | return r; |
3529 | } | |
3530 | ||
52d939a0 MT |
3531 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
3532 | struct kvm_reinject_control *control) | |
3533 | { | |
3534 | if (!kvm->arch.vpit) | |
3535 | return -ENXIO; | |
894a9c55 | 3536 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
26ef1924 | 3537 | kvm->arch.vpit->pit_state.reinject = control->pit_reinject; |
894a9c55 | 3538 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 MT |
3539 | return 0; |
3540 | } | |
3541 | ||
95d4c16c | 3542 | /** |
60c34612 TY |
3543 | * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot |
3544 | * @kvm: kvm instance | |
3545 | * @log: slot id and address to which we copy the log | |
95d4c16c | 3546 | * |
60c34612 TY |
3547 | * We need to keep it in mind that VCPU threads can write to the bitmap |
3548 | * concurrently. So, to avoid losing data, we keep the following order for | |
3549 | * each bit: | |
95d4c16c | 3550 | * |
60c34612 TY |
3551 | * 1. Take a snapshot of the bit and clear it if needed. |
3552 | * 2. Write protect the corresponding page. | |
3553 | * 3. Flush TLB's if needed. | |
3554 | * 4. Copy the snapshot to the userspace. | |
95d4c16c | 3555 | * |
60c34612 TY |
3556 | * Between 2 and 3, the guest may write to the page using the remaining TLB |
3557 | * entry. This is not a problem because the page will be reported dirty at | |
3558 | * step 4 using the snapshot taken before and step 3 ensures that successive | |
3559 | * writes will be logged for the next call. | |
5bb064dc | 3560 | */ |
60c34612 | 3561 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
5bb064dc | 3562 | { |
7850ac54 | 3563 | int r; |
5bb064dc | 3564 | struct kvm_memory_slot *memslot; |
60c34612 TY |
3565 | unsigned long n, i; |
3566 | unsigned long *dirty_bitmap; | |
3567 | unsigned long *dirty_bitmap_buffer; | |
3568 | bool is_dirty = false; | |
5bb064dc | 3569 | |
79fac95e | 3570 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 3571 | |
b050b015 | 3572 | r = -EINVAL; |
bbacc0c1 | 3573 | if (log->slot >= KVM_USER_MEM_SLOTS) |
b050b015 MT |
3574 | goto out; |
3575 | ||
28a37544 | 3576 | memslot = id_to_memslot(kvm->memslots, log->slot); |
60c34612 TY |
3577 | |
3578 | dirty_bitmap = memslot->dirty_bitmap; | |
b050b015 | 3579 | r = -ENOENT; |
60c34612 | 3580 | if (!dirty_bitmap) |
b050b015 MT |
3581 | goto out; |
3582 | ||
87bf6e7d | 3583 | n = kvm_dirty_bitmap_bytes(memslot); |
b050b015 | 3584 | |
60c34612 TY |
3585 | dirty_bitmap_buffer = dirty_bitmap + n / sizeof(long); |
3586 | memset(dirty_bitmap_buffer, 0, n); | |
b050b015 | 3587 | |
60c34612 | 3588 | spin_lock(&kvm->mmu_lock); |
b050b015 | 3589 | |
60c34612 TY |
3590 | for (i = 0; i < n / sizeof(long); i++) { |
3591 | unsigned long mask; | |
3592 | gfn_t offset; | |
cdfca7b3 | 3593 | |
60c34612 TY |
3594 | if (!dirty_bitmap[i]) |
3595 | continue; | |
b050b015 | 3596 | |
60c34612 | 3597 | is_dirty = true; |
914ebccd | 3598 | |
60c34612 TY |
3599 | mask = xchg(&dirty_bitmap[i], 0); |
3600 | dirty_bitmap_buffer[i] = mask; | |
edde99ce | 3601 | |
60c34612 TY |
3602 | offset = i * BITS_PER_LONG; |
3603 | kvm_mmu_write_protect_pt_masked(kvm, memslot, offset, mask); | |
5bb064dc | 3604 | } |
60c34612 TY |
3605 | if (is_dirty) |
3606 | kvm_flush_remote_tlbs(kvm); | |
3607 | ||
3608 | spin_unlock(&kvm->mmu_lock); | |
3609 | ||
3610 | r = -EFAULT; | |
3611 | if (copy_to_user(log->dirty_bitmap, dirty_bitmap_buffer, n)) | |
3612 | goto out; | |
b050b015 | 3613 | |
5bb064dc ZX |
3614 | r = 0; |
3615 | out: | |
79fac95e | 3616 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
3617 | return r; |
3618 | } | |
3619 | ||
aa2fbe6d YZ |
3620 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, |
3621 | bool line_status) | |
23d43cf9 CD |
3622 | { |
3623 | if (!irqchip_in_kernel(kvm)) | |
3624 | return -ENXIO; | |
3625 | ||
3626 | irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, | |
aa2fbe6d YZ |
3627 | irq_event->irq, irq_event->level, |
3628 | line_status); | |
23d43cf9 CD |
3629 | return 0; |
3630 | } | |
3631 | ||
1fe779f8 CO |
3632 | long kvm_arch_vm_ioctl(struct file *filp, |
3633 | unsigned int ioctl, unsigned long arg) | |
3634 | { | |
3635 | struct kvm *kvm = filp->private_data; | |
3636 | void __user *argp = (void __user *)arg; | |
367e1319 | 3637 | int r = -ENOTTY; |
f0d66275 DH |
3638 | /* |
3639 | * This union makes it completely explicit to gcc-3.x | |
3640 | * that these two variables' stack usage should be | |
3641 | * combined, not added together. | |
3642 | */ | |
3643 | union { | |
3644 | struct kvm_pit_state ps; | |
e9f42757 | 3645 | struct kvm_pit_state2 ps2; |
c5ff41ce | 3646 | struct kvm_pit_config pit_config; |
f0d66275 | 3647 | } u; |
1fe779f8 CO |
3648 | |
3649 | switch (ioctl) { | |
3650 | case KVM_SET_TSS_ADDR: | |
3651 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
1fe779f8 | 3652 | break; |
b927a3ce SY |
3653 | case KVM_SET_IDENTITY_MAP_ADDR: { |
3654 | u64 ident_addr; | |
3655 | ||
3656 | r = -EFAULT; | |
3657 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
3658 | goto out; | |
3659 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); | |
b927a3ce SY |
3660 | break; |
3661 | } | |
1fe779f8 CO |
3662 | case KVM_SET_NR_MMU_PAGES: |
3663 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
1fe779f8 CO |
3664 | break; |
3665 | case KVM_GET_NR_MMU_PAGES: | |
3666 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
3667 | break; | |
3ddea128 MT |
3668 | case KVM_CREATE_IRQCHIP: { |
3669 | struct kvm_pic *vpic; | |
3670 | ||
3671 | mutex_lock(&kvm->lock); | |
3672 | r = -EEXIST; | |
3673 | if (kvm->arch.vpic) | |
3674 | goto create_irqchip_unlock; | |
3e515705 AK |
3675 | r = -EINVAL; |
3676 | if (atomic_read(&kvm->online_vcpus)) | |
3677 | goto create_irqchip_unlock; | |
1fe779f8 | 3678 | r = -ENOMEM; |
3ddea128 MT |
3679 | vpic = kvm_create_pic(kvm); |
3680 | if (vpic) { | |
1fe779f8 CO |
3681 | r = kvm_ioapic_init(kvm); |
3682 | if (r) { | |
175504cd | 3683 | mutex_lock(&kvm->slots_lock); |
72bb2fcd | 3684 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, |
743eeb0b SL |
3685 | &vpic->dev_master); |
3686 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, | |
3687 | &vpic->dev_slave); | |
3688 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, | |
3689 | &vpic->dev_eclr); | |
175504cd | 3690 | mutex_unlock(&kvm->slots_lock); |
3ddea128 MT |
3691 | kfree(vpic); |
3692 | goto create_irqchip_unlock; | |
1fe779f8 CO |
3693 | } |
3694 | } else | |
3ddea128 MT |
3695 | goto create_irqchip_unlock; |
3696 | smp_wmb(); | |
3697 | kvm->arch.vpic = vpic; | |
3698 | smp_wmb(); | |
399ec807 AK |
3699 | r = kvm_setup_default_irq_routing(kvm); |
3700 | if (r) { | |
175504cd | 3701 | mutex_lock(&kvm->slots_lock); |
3ddea128 | 3702 | mutex_lock(&kvm->irq_lock); |
72bb2fcd WY |
3703 | kvm_ioapic_destroy(kvm); |
3704 | kvm_destroy_pic(kvm); | |
3ddea128 | 3705 | mutex_unlock(&kvm->irq_lock); |
175504cd | 3706 | mutex_unlock(&kvm->slots_lock); |
399ec807 | 3707 | } |
3ddea128 MT |
3708 | create_irqchip_unlock: |
3709 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 3710 | break; |
3ddea128 | 3711 | } |
7837699f | 3712 | case KVM_CREATE_PIT: |
c5ff41ce JK |
3713 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
3714 | goto create_pit; | |
3715 | case KVM_CREATE_PIT2: | |
3716 | r = -EFAULT; | |
3717 | if (copy_from_user(&u.pit_config, argp, | |
3718 | sizeof(struct kvm_pit_config))) | |
3719 | goto out; | |
3720 | create_pit: | |
79fac95e | 3721 | mutex_lock(&kvm->slots_lock); |
269e05e4 AK |
3722 | r = -EEXIST; |
3723 | if (kvm->arch.vpit) | |
3724 | goto create_pit_unlock; | |
7837699f | 3725 | r = -ENOMEM; |
c5ff41ce | 3726 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
3727 | if (kvm->arch.vpit) |
3728 | r = 0; | |
269e05e4 | 3729 | create_pit_unlock: |
79fac95e | 3730 | mutex_unlock(&kvm->slots_lock); |
7837699f | 3731 | break; |
1fe779f8 CO |
3732 | case KVM_GET_IRQCHIP: { |
3733 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 3734 | struct kvm_irqchip *chip; |
1fe779f8 | 3735 | |
ff5c2c03 SL |
3736 | chip = memdup_user(argp, sizeof(*chip)); |
3737 | if (IS_ERR(chip)) { | |
3738 | r = PTR_ERR(chip); | |
1fe779f8 | 3739 | goto out; |
ff5c2c03 SL |
3740 | } |
3741 | ||
1fe779f8 CO |
3742 | r = -ENXIO; |
3743 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3744 | goto get_irqchip_out; |
3745 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 3746 | if (r) |
f0d66275 | 3747 | goto get_irqchip_out; |
1fe779f8 | 3748 | r = -EFAULT; |
f0d66275 DH |
3749 | if (copy_to_user(argp, chip, sizeof *chip)) |
3750 | goto get_irqchip_out; | |
1fe779f8 | 3751 | r = 0; |
f0d66275 DH |
3752 | get_irqchip_out: |
3753 | kfree(chip); | |
1fe779f8 CO |
3754 | break; |
3755 | } | |
3756 | case KVM_SET_IRQCHIP: { | |
3757 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 3758 | struct kvm_irqchip *chip; |
1fe779f8 | 3759 | |
ff5c2c03 SL |
3760 | chip = memdup_user(argp, sizeof(*chip)); |
3761 | if (IS_ERR(chip)) { | |
3762 | r = PTR_ERR(chip); | |
1fe779f8 | 3763 | goto out; |
ff5c2c03 SL |
3764 | } |
3765 | ||
1fe779f8 CO |
3766 | r = -ENXIO; |
3767 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3768 | goto set_irqchip_out; |
3769 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 3770 | if (r) |
f0d66275 | 3771 | goto set_irqchip_out; |
1fe779f8 | 3772 | r = 0; |
f0d66275 DH |
3773 | set_irqchip_out: |
3774 | kfree(chip); | |
1fe779f8 CO |
3775 | break; |
3776 | } | |
e0f63cb9 | 3777 | case KVM_GET_PIT: { |
e0f63cb9 | 3778 | r = -EFAULT; |
f0d66275 | 3779 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3780 | goto out; |
3781 | r = -ENXIO; | |
3782 | if (!kvm->arch.vpit) | |
3783 | goto out; | |
f0d66275 | 3784 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
3785 | if (r) |
3786 | goto out; | |
3787 | r = -EFAULT; | |
f0d66275 | 3788 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3789 | goto out; |
3790 | r = 0; | |
3791 | break; | |
3792 | } | |
3793 | case KVM_SET_PIT: { | |
e0f63cb9 | 3794 | r = -EFAULT; |
f0d66275 | 3795 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
3796 | goto out; |
3797 | r = -ENXIO; | |
3798 | if (!kvm->arch.vpit) | |
3799 | goto out; | |
f0d66275 | 3800 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
3801 | break; |
3802 | } | |
e9f42757 BK |
3803 | case KVM_GET_PIT2: { |
3804 | r = -ENXIO; | |
3805 | if (!kvm->arch.vpit) | |
3806 | goto out; | |
3807 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
3808 | if (r) | |
3809 | goto out; | |
3810 | r = -EFAULT; | |
3811 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
3812 | goto out; | |
3813 | r = 0; | |
3814 | break; | |
3815 | } | |
3816 | case KVM_SET_PIT2: { | |
3817 | r = -EFAULT; | |
3818 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
3819 | goto out; | |
3820 | r = -ENXIO; | |
3821 | if (!kvm->arch.vpit) | |
3822 | goto out; | |
3823 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
e9f42757 BK |
3824 | break; |
3825 | } | |
52d939a0 MT |
3826 | case KVM_REINJECT_CONTROL: { |
3827 | struct kvm_reinject_control control; | |
3828 | r = -EFAULT; | |
3829 | if (copy_from_user(&control, argp, sizeof(control))) | |
3830 | goto out; | |
3831 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
52d939a0 MT |
3832 | break; |
3833 | } | |
ffde22ac ES |
3834 | case KVM_XEN_HVM_CONFIG: { |
3835 | r = -EFAULT; | |
3836 | if (copy_from_user(&kvm->arch.xen_hvm_config, argp, | |
3837 | sizeof(struct kvm_xen_hvm_config))) | |
3838 | goto out; | |
3839 | r = -EINVAL; | |
3840 | if (kvm->arch.xen_hvm_config.flags) | |
3841 | goto out; | |
3842 | r = 0; | |
3843 | break; | |
3844 | } | |
afbcf7ab | 3845 | case KVM_SET_CLOCK: { |
afbcf7ab GC |
3846 | struct kvm_clock_data user_ns; |
3847 | u64 now_ns; | |
3848 | s64 delta; | |
3849 | ||
3850 | r = -EFAULT; | |
3851 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
3852 | goto out; | |
3853 | ||
3854 | r = -EINVAL; | |
3855 | if (user_ns.flags) | |
3856 | goto out; | |
3857 | ||
3858 | r = 0; | |
395c6b0a | 3859 | local_irq_disable(); |
759379dd | 3860 | now_ns = get_kernel_ns(); |
afbcf7ab | 3861 | delta = user_ns.clock - now_ns; |
395c6b0a | 3862 | local_irq_enable(); |
afbcf7ab | 3863 | kvm->arch.kvmclock_offset = delta; |
2e762ff7 | 3864 | kvm_gen_update_masterclock(kvm); |
afbcf7ab GC |
3865 | break; |
3866 | } | |
3867 | case KVM_GET_CLOCK: { | |
afbcf7ab GC |
3868 | struct kvm_clock_data user_ns; |
3869 | u64 now_ns; | |
3870 | ||
395c6b0a | 3871 | local_irq_disable(); |
759379dd | 3872 | now_ns = get_kernel_ns(); |
afbcf7ab | 3873 | user_ns.clock = kvm->arch.kvmclock_offset + now_ns; |
395c6b0a | 3874 | local_irq_enable(); |
afbcf7ab | 3875 | user_ns.flags = 0; |
97e69aa6 | 3876 | memset(&user_ns.pad, 0, sizeof(user_ns.pad)); |
afbcf7ab GC |
3877 | |
3878 | r = -EFAULT; | |
3879 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
3880 | goto out; | |
3881 | r = 0; | |
3882 | break; | |
3883 | } | |
3884 | ||
1fe779f8 CO |
3885 | default: |
3886 | ; | |
3887 | } | |
3888 | out: | |
3889 | return r; | |
3890 | } | |
3891 | ||
a16b043c | 3892 | static void kvm_init_msr_list(void) |
043405e1 CO |
3893 | { |
3894 | u32 dummy[2]; | |
3895 | unsigned i, j; | |
3896 | ||
e3267cbb GC |
3897 | /* skip the first msrs in the list. KVM-specific */ |
3898 | for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) { | |
043405e1 CO |
3899 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
3900 | continue; | |
3901 | if (j < i) | |
3902 | msrs_to_save[j] = msrs_to_save[i]; | |
3903 | j++; | |
3904 | } | |
3905 | num_msrs_to_save = j; | |
3906 | } | |
3907 | ||
bda9020e MT |
3908 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
3909 | const void *v) | |
bbd9b64e | 3910 | { |
70252a10 AK |
3911 | int handled = 0; |
3912 | int n; | |
3913 | ||
3914 | do { | |
3915 | n = min(len, 8); | |
3916 | if (!(vcpu->arch.apic && | |
3917 | !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, n, v)) | |
3918 | && kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, n, v)) | |
3919 | break; | |
3920 | handled += n; | |
3921 | addr += n; | |
3922 | len -= n; | |
3923 | v += n; | |
3924 | } while (len); | |
bbd9b64e | 3925 | |
70252a10 | 3926 | return handled; |
bbd9b64e CO |
3927 | } |
3928 | ||
bda9020e | 3929 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 3930 | { |
70252a10 AK |
3931 | int handled = 0; |
3932 | int n; | |
3933 | ||
3934 | do { | |
3935 | n = min(len, 8); | |
3936 | if (!(vcpu->arch.apic && | |
3937 | !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, n, v)) | |
3938 | && kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, n, v)) | |
3939 | break; | |
3940 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, *(u64 *)v); | |
3941 | handled += n; | |
3942 | addr += n; | |
3943 | len -= n; | |
3944 | v += n; | |
3945 | } while (len); | |
bbd9b64e | 3946 | |
70252a10 | 3947 | return handled; |
bbd9b64e CO |
3948 | } |
3949 | ||
2dafc6c2 GN |
3950 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
3951 | struct kvm_segment *var, int seg) | |
3952 | { | |
3953 | kvm_x86_ops->set_segment(vcpu, var, seg); | |
3954 | } | |
3955 | ||
3956 | void kvm_get_segment(struct kvm_vcpu *vcpu, | |
3957 | struct kvm_segment *var, int seg) | |
3958 | { | |
3959 | kvm_x86_ops->get_segment(vcpu, var, seg); | |
3960 | } | |
3961 | ||
e459e322 | 3962 | gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) |
02f59dc9 JR |
3963 | { |
3964 | gpa_t t_gpa; | |
ab9ae313 | 3965 | struct x86_exception exception; |
02f59dc9 JR |
3966 | |
3967 | BUG_ON(!mmu_is_nested(vcpu)); | |
3968 | ||
3969 | /* NPT walks are always user-walks */ | |
3970 | access |= PFERR_USER_MASK; | |
ab9ae313 | 3971 | t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, &exception); |
02f59dc9 JR |
3972 | |
3973 | return t_gpa; | |
3974 | } | |
3975 | ||
ab9ae313 AK |
3976 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, |
3977 | struct x86_exception *exception) | |
1871c602 GN |
3978 | { |
3979 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
ab9ae313 | 3980 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
3981 | } |
3982 | ||
ab9ae313 AK |
3983 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, |
3984 | struct x86_exception *exception) | |
1871c602 GN |
3985 | { |
3986 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3987 | access |= PFERR_FETCH_MASK; | |
ab9ae313 | 3988 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
3989 | } |
3990 | ||
ab9ae313 AK |
3991 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, |
3992 | struct x86_exception *exception) | |
1871c602 GN |
3993 | { |
3994 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3995 | access |= PFERR_WRITE_MASK; | |
ab9ae313 | 3996 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
3997 | } |
3998 | ||
3999 | /* uses this to access any guest's mapped memory without checking CPL */ | |
ab9ae313 AK |
4000 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, |
4001 | struct x86_exception *exception) | |
1871c602 | 4002 | { |
ab9ae313 | 4003 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception); |
1871c602 GN |
4004 | } |
4005 | ||
4006 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
4007 | struct kvm_vcpu *vcpu, u32 access, | |
bcc55cba | 4008 | struct x86_exception *exception) |
bbd9b64e CO |
4009 | { |
4010 | void *data = val; | |
10589a46 | 4011 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
4012 | |
4013 | while (bytes) { | |
14dfe855 | 4014 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access, |
ab9ae313 | 4015 | exception); |
bbd9b64e | 4016 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 4017 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
4018 | int ret; |
4019 | ||
bcc55cba | 4020 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4021 | return X86EMUL_PROPAGATE_FAULT; |
77c2002e | 4022 | ret = kvm_read_guest(vcpu->kvm, gpa, data, toread); |
10589a46 | 4023 | if (ret < 0) { |
c3cd7ffa | 4024 | r = X86EMUL_IO_NEEDED; |
10589a46 MT |
4025 | goto out; |
4026 | } | |
bbd9b64e | 4027 | |
77c2002e IE |
4028 | bytes -= toread; |
4029 | data += toread; | |
4030 | addr += toread; | |
bbd9b64e | 4031 | } |
10589a46 | 4032 | out: |
10589a46 | 4033 | return r; |
bbd9b64e | 4034 | } |
77c2002e | 4035 | |
1871c602 | 4036 | /* used for instruction fetching */ |
0f65dd70 AK |
4037 | static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt, |
4038 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4039 | struct x86_exception *exception) |
1871c602 | 4040 | { |
0f65dd70 | 4041 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4042 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
0f65dd70 | 4043 | |
1871c602 | 4044 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, |
bcc55cba AK |
4045 | access | PFERR_FETCH_MASK, |
4046 | exception); | |
1871c602 GN |
4047 | } |
4048 | ||
064aea77 | 4049 | int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4050 | gva_t addr, void *val, unsigned int bytes, |
bcc55cba | 4051 | struct x86_exception *exception) |
1871c602 | 4052 | { |
0f65dd70 | 4053 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4054 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
0f65dd70 | 4055 | |
1871c602 | 4056 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, |
bcc55cba | 4057 | exception); |
1871c602 | 4058 | } |
064aea77 | 4059 | EXPORT_SYMBOL_GPL(kvm_read_guest_virt); |
1871c602 | 4060 | |
0f65dd70 AK |
4061 | static int kvm_read_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
4062 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4063 | struct x86_exception *exception) |
1871c602 | 4064 | { |
0f65dd70 | 4065 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
bcc55cba | 4066 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception); |
1871c602 GN |
4067 | } |
4068 | ||
6a4d7550 | 4069 | int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4070 | gva_t addr, void *val, |
2dafc6c2 | 4071 | unsigned int bytes, |
bcc55cba | 4072 | struct x86_exception *exception) |
77c2002e | 4073 | { |
0f65dd70 | 4074 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
77c2002e IE |
4075 | void *data = val; |
4076 | int r = X86EMUL_CONTINUE; | |
4077 | ||
4078 | while (bytes) { | |
14dfe855 JR |
4079 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, |
4080 | PFERR_WRITE_MASK, | |
ab9ae313 | 4081 | exception); |
77c2002e IE |
4082 | unsigned offset = addr & (PAGE_SIZE-1); |
4083 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
4084 | int ret; | |
4085 | ||
bcc55cba | 4086 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4087 | return X86EMUL_PROPAGATE_FAULT; |
77c2002e IE |
4088 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); |
4089 | if (ret < 0) { | |
c3cd7ffa | 4090 | r = X86EMUL_IO_NEEDED; |
77c2002e IE |
4091 | goto out; |
4092 | } | |
4093 | ||
4094 | bytes -= towrite; | |
4095 | data += towrite; | |
4096 | addr += towrite; | |
4097 | } | |
4098 | out: | |
4099 | return r; | |
4100 | } | |
6a4d7550 | 4101 | EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system); |
77c2002e | 4102 | |
af7cc7d1 XG |
4103 | static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva, |
4104 | gpa_t *gpa, struct x86_exception *exception, | |
4105 | bool write) | |
4106 | { | |
97d64b78 AK |
4107 | u32 access = ((kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0) |
4108 | | (write ? PFERR_WRITE_MASK : 0); | |
af7cc7d1 | 4109 | |
97d64b78 AK |
4110 | if (vcpu_match_mmio_gva(vcpu, gva) |
4111 | && !permission_fault(vcpu->arch.walk_mmu, vcpu->arch.access, access)) { | |
bebb106a XG |
4112 | *gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT | |
4113 | (gva & (PAGE_SIZE - 1)); | |
4f022648 | 4114 | trace_vcpu_match_mmio(gva, *gpa, write, false); |
bebb106a XG |
4115 | return 1; |
4116 | } | |
4117 | ||
af7cc7d1 XG |
4118 | *gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
4119 | ||
4120 | if (*gpa == UNMAPPED_GVA) | |
4121 | return -1; | |
4122 | ||
4123 | /* For APIC access vmexit */ | |
4124 | if ((*gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4125 | return 1; | |
4126 | ||
4f022648 XG |
4127 | if (vcpu_match_mmio_gpa(vcpu, *gpa)) { |
4128 | trace_vcpu_match_mmio(gva, *gpa, write, true); | |
bebb106a | 4129 | return 1; |
4f022648 | 4130 | } |
bebb106a | 4131 | |
af7cc7d1 XG |
4132 | return 0; |
4133 | } | |
4134 | ||
3200f405 | 4135 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
bcc55cba | 4136 | const void *val, int bytes) |
bbd9b64e CO |
4137 | { |
4138 | int ret; | |
4139 | ||
4140 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); | |
9f811285 | 4141 | if (ret < 0) |
bbd9b64e | 4142 | return 0; |
f57f2ef5 | 4143 | kvm_mmu_pte_write(vcpu, gpa, val, bytes); |
bbd9b64e CO |
4144 | return 1; |
4145 | } | |
4146 | ||
77d197b2 XG |
4147 | struct read_write_emulator_ops { |
4148 | int (*read_write_prepare)(struct kvm_vcpu *vcpu, void *val, | |
4149 | int bytes); | |
4150 | int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4151 | void *val, int bytes); | |
4152 | int (*read_write_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4153 | int bytes, void *val); | |
4154 | int (*read_write_exit_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4155 | void *val, int bytes); | |
4156 | bool write; | |
4157 | }; | |
4158 | ||
4159 | static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes) | |
4160 | { | |
4161 | if (vcpu->mmio_read_completed) { | |
77d197b2 | 4162 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
f78146b0 | 4163 | vcpu->mmio_fragments[0].gpa, *(u64 *)val); |
77d197b2 XG |
4164 | vcpu->mmio_read_completed = 0; |
4165 | return 1; | |
4166 | } | |
4167 | ||
4168 | return 0; | |
4169 | } | |
4170 | ||
4171 | static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4172 | void *val, int bytes) | |
4173 | { | |
4174 | return !kvm_read_guest(vcpu->kvm, gpa, val, bytes); | |
4175 | } | |
4176 | ||
4177 | static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4178 | void *val, int bytes) | |
4179 | { | |
4180 | return emulator_write_phys(vcpu, gpa, val, bytes); | |
4181 | } | |
4182 | ||
4183 | static int write_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val) | |
4184 | { | |
4185 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); | |
4186 | return vcpu_mmio_write(vcpu, gpa, bytes, val); | |
4187 | } | |
4188 | ||
4189 | static int read_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4190 | void *val, int bytes) | |
4191 | { | |
4192 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
4193 | return X86EMUL_IO_NEEDED; | |
4194 | } | |
4195 | ||
4196 | static int write_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4197 | void *val, int bytes) | |
4198 | { | |
f78146b0 AK |
4199 | struct kvm_mmio_fragment *frag = &vcpu->mmio_fragments[0]; |
4200 | ||
87da7e66 | 4201 | memcpy(vcpu->run->mmio.data, frag->data, min(8u, frag->len)); |
77d197b2 XG |
4202 | return X86EMUL_CONTINUE; |
4203 | } | |
4204 | ||
0fbe9b0b | 4205 | static const struct read_write_emulator_ops read_emultor = { |
77d197b2 XG |
4206 | .read_write_prepare = read_prepare, |
4207 | .read_write_emulate = read_emulate, | |
4208 | .read_write_mmio = vcpu_mmio_read, | |
4209 | .read_write_exit_mmio = read_exit_mmio, | |
4210 | }; | |
4211 | ||
0fbe9b0b | 4212 | static const struct read_write_emulator_ops write_emultor = { |
77d197b2 XG |
4213 | .read_write_emulate = write_emulate, |
4214 | .read_write_mmio = write_mmio, | |
4215 | .read_write_exit_mmio = write_exit_mmio, | |
4216 | .write = true, | |
4217 | }; | |
4218 | ||
22388a3c XG |
4219 | static int emulator_read_write_onepage(unsigned long addr, void *val, |
4220 | unsigned int bytes, | |
4221 | struct x86_exception *exception, | |
4222 | struct kvm_vcpu *vcpu, | |
0fbe9b0b | 4223 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 4224 | { |
af7cc7d1 XG |
4225 | gpa_t gpa; |
4226 | int handled, ret; | |
22388a3c | 4227 | bool write = ops->write; |
f78146b0 | 4228 | struct kvm_mmio_fragment *frag; |
10589a46 | 4229 | |
22388a3c | 4230 | ret = vcpu_mmio_gva_to_gpa(vcpu, addr, &gpa, exception, write); |
bbd9b64e | 4231 | |
af7cc7d1 | 4232 | if (ret < 0) |
bbd9b64e | 4233 | return X86EMUL_PROPAGATE_FAULT; |
bbd9b64e CO |
4234 | |
4235 | /* For APIC access vmexit */ | |
af7cc7d1 | 4236 | if (ret) |
bbd9b64e CO |
4237 | goto mmio; |
4238 | ||
22388a3c | 4239 | if (ops->read_write_emulate(vcpu, gpa, val, bytes)) |
bbd9b64e CO |
4240 | return X86EMUL_CONTINUE; |
4241 | ||
4242 | mmio: | |
4243 | /* | |
4244 | * Is this MMIO handled locally? | |
4245 | */ | |
22388a3c | 4246 | handled = ops->read_write_mmio(vcpu, gpa, bytes, val); |
70252a10 | 4247 | if (handled == bytes) |
bbd9b64e | 4248 | return X86EMUL_CONTINUE; |
bbd9b64e | 4249 | |
70252a10 AK |
4250 | gpa += handled; |
4251 | bytes -= handled; | |
4252 | val += handled; | |
4253 | ||
87da7e66 XG |
4254 | WARN_ON(vcpu->mmio_nr_fragments >= KVM_MAX_MMIO_FRAGMENTS); |
4255 | frag = &vcpu->mmio_fragments[vcpu->mmio_nr_fragments++]; | |
4256 | frag->gpa = gpa; | |
4257 | frag->data = val; | |
4258 | frag->len = bytes; | |
f78146b0 | 4259 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
4260 | } |
4261 | ||
22388a3c XG |
4262 | int emulator_read_write(struct x86_emulate_ctxt *ctxt, unsigned long addr, |
4263 | void *val, unsigned int bytes, | |
4264 | struct x86_exception *exception, | |
0fbe9b0b | 4265 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 4266 | { |
0f65dd70 | 4267 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
f78146b0 AK |
4268 | gpa_t gpa; |
4269 | int rc; | |
4270 | ||
4271 | if (ops->read_write_prepare && | |
4272 | ops->read_write_prepare(vcpu, val, bytes)) | |
4273 | return X86EMUL_CONTINUE; | |
4274 | ||
4275 | vcpu->mmio_nr_fragments = 0; | |
0f65dd70 | 4276 | |
bbd9b64e CO |
4277 | /* Crossing a page boundary? */ |
4278 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
f78146b0 | 4279 | int now; |
bbd9b64e CO |
4280 | |
4281 | now = -addr & ~PAGE_MASK; | |
22388a3c XG |
4282 | rc = emulator_read_write_onepage(addr, val, now, exception, |
4283 | vcpu, ops); | |
4284 | ||
bbd9b64e CO |
4285 | if (rc != X86EMUL_CONTINUE) |
4286 | return rc; | |
4287 | addr += now; | |
4288 | val += now; | |
4289 | bytes -= now; | |
4290 | } | |
22388a3c | 4291 | |
f78146b0 AK |
4292 | rc = emulator_read_write_onepage(addr, val, bytes, exception, |
4293 | vcpu, ops); | |
4294 | if (rc != X86EMUL_CONTINUE) | |
4295 | return rc; | |
4296 | ||
4297 | if (!vcpu->mmio_nr_fragments) | |
4298 | return rc; | |
4299 | ||
4300 | gpa = vcpu->mmio_fragments[0].gpa; | |
4301 | ||
4302 | vcpu->mmio_needed = 1; | |
4303 | vcpu->mmio_cur_fragment = 0; | |
4304 | ||
87da7e66 | 4305 | vcpu->run->mmio.len = min(8u, vcpu->mmio_fragments[0].len); |
f78146b0 AK |
4306 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = ops->write; |
4307 | vcpu->run->exit_reason = KVM_EXIT_MMIO; | |
4308 | vcpu->run->mmio.phys_addr = gpa; | |
4309 | ||
4310 | return ops->read_write_exit_mmio(vcpu, gpa, val, bytes); | |
22388a3c XG |
4311 | } |
4312 | ||
4313 | static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt, | |
4314 | unsigned long addr, | |
4315 | void *val, | |
4316 | unsigned int bytes, | |
4317 | struct x86_exception *exception) | |
4318 | { | |
4319 | return emulator_read_write(ctxt, addr, val, bytes, | |
4320 | exception, &read_emultor); | |
4321 | } | |
4322 | ||
4323 | int emulator_write_emulated(struct x86_emulate_ctxt *ctxt, | |
4324 | unsigned long addr, | |
4325 | const void *val, | |
4326 | unsigned int bytes, | |
4327 | struct x86_exception *exception) | |
4328 | { | |
4329 | return emulator_read_write(ctxt, addr, (void *)val, bytes, | |
4330 | exception, &write_emultor); | |
bbd9b64e | 4331 | } |
bbd9b64e | 4332 | |
daea3e73 AK |
4333 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
4334 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) | |
4335 | ||
4336 | #ifdef CONFIG_X86_64 | |
4337 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) | |
4338 | #else | |
4339 | # define CMPXCHG64(ptr, old, new) \ | |
9749a6c0 | 4340 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
daea3e73 AK |
4341 | #endif |
4342 | ||
0f65dd70 AK |
4343 | static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, |
4344 | unsigned long addr, | |
bbd9b64e CO |
4345 | const void *old, |
4346 | const void *new, | |
4347 | unsigned int bytes, | |
0f65dd70 | 4348 | struct x86_exception *exception) |
bbd9b64e | 4349 | { |
0f65dd70 | 4350 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
daea3e73 AK |
4351 | gpa_t gpa; |
4352 | struct page *page; | |
4353 | char *kaddr; | |
4354 | bool exchanged; | |
2bacc55c | 4355 | |
daea3e73 AK |
4356 | /* guests cmpxchg8b have to be emulated atomically */ |
4357 | if (bytes > 8 || (bytes & (bytes - 1))) | |
4358 | goto emul_write; | |
10589a46 | 4359 | |
daea3e73 | 4360 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
2bacc55c | 4361 | |
daea3e73 AK |
4362 | if (gpa == UNMAPPED_GVA || |
4363 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4364 | goto emul_write; | |
2bacc55c | 4365 | |
daea3e73 AK |
4366 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
4367 | goto emul_write; | |
72dc67a6 | 4368 | |
daea3e73 | 4369 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
32cad84f | 4370 | if (is_error_page(page)) |
c19b8bd6 | 4371 | goto emul_write; |
72dc67a6 | 4372 | |
8fd75e12 | 4373 | kaddr = kmap_atomic(page); |
daea3e73 AK |
4374 | kaddr += offset_in_page(gpa); |
4375 | switch (bytes) { | |
4376 | case 1: | |
4377 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); | |
4378 | break; | |
4379 | case 2: | |
4380 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); | |
4381 | break; | |
4382 | case 4: | |
4383 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); | |
4384 | break; | |
4385 | case 8: | |
4386 | exchanged = CMPXCHG64(kaddr, old, new); | |
4387 | break; | |
4388 | default: | |
4389 | BUG(); | |
2bacc55c | 4390 | } |
8fd75e12 | 4391 | kunmap_atomic(kaddr); |
daea3e73 AK |
4392 | kvm_release_page_dirty(page); |
4393 | ||
4394 | if (!exchanged) | |
4395 | return X86EMUL_CMPXCHG_FAILED; | |
4396 | ||
f57f2ef5 | 4397 | kvm_mmu_pte_write(vcpu, gpa, new, bytes); |
8f6abd06 GN |
4398 | |
4399 | return X86EMUL_CONTINUE; | |
4a5f48f6 | 4400 | |
3200f405 | 4401 | emul_write: |
daea3e73 | 4402 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c | 4403 | |
0f65dd70 | 4404 | return emulator_write_emulated(ctxt, addr, new, bytes, exception); |
bbd9b64e CO |
4405 | } |
4406 | ||
cf8f70bf GN |
4407 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
4408 | { | |
4409 | /* TODO: String I/O for in kernel device */ | |
4410 | int r; | |
4411 | ||
4412 | if (vcpu->arch.pio.in) | |
4413 | r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port, | |
4414 | vcpu->arch.pio.size, pd); | |
4415 | else | |
4416 | r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS, | |
4417 | vcpu->arch.pio.port, vcpu->arch.pio.size, | |
4418 | pd); | |
4419 | return r; | |
4420 | } | |
4421 | ||
6f6fbe98 XG |
4422 | static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size, |
4423 | unsigned short port, void *val, | |
4424 | unsigned int count, bool in) | |
cf8f70bf | 4425 | { |
6f6fbe98 | 4426 | trace_kvm_pio(!in, port, size, count); |
cf8f70bf GN |
4427 | |
4428 | vcpu->arch.pio.port = port; | |
6f6fbe98 | 4429 | vcpu->arch.pio.in = in; |
7972995b | 4430 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
4431 | vcpu->arch.pio.size = size; |
4432 | ||
4433 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
7972995b | 4434 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4435 | return 1; |
4436 | } | |
4437 | ||
4438 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
6f6fbe98 | 4439 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; |
cf8f70bf GN |
4440 | vcpu->run->io.size = size; |
4441 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
4442 | vcpu->run->io.count = count; | |
4443 | vcpu->run->io.port = port; | |
4444 | ||
4445 | return 0; | |
4446 | } | |
4447 | ||
6f6fbe98 XG |
4448 | static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt, |
4449 | int size, unsigned short port, void *val, | |
4450 | unsigned int count) | |
cf8f70bf | 4451 | { |
ca1d4a9e | 4452 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
6f6fbe98 | 4453 | int ret; |
ca1d4a9e | 4454 | |
6f6fbe98 XG |
4455 | if (vcpu->arch.pio.count) |
4456 | goto data_avail; | |
cf8f70bf | 4457 | |
6f6fbe98 XG |
4458 | ret = emulator_pio_in_out(vcpu, size, port, val, count, true); |
4459 | if (ret) { | |
4460 | data_avail: | |
4461 | memcpy(val, vcpu->arch.pio_data, size * count); | |
7972995b | 4462 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4463 | return 1; |
4464 | } | |
4465 | ||
cf8f70bf GN |
4466 | return 0; |
4467 | } | |
4468 | ||
6f6fbe98 XG |
4469 | static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt, |
4470 | int size, unsigned short port, | |
4471 | const void *val, unsigned int count) | |
4472 | { | |
4473 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4474 | ||
4475 | memcpy(vcpu->arch.pio_data, val, size * count); | |
4476 | return emulator_pio_in_out(vcpu, size, port, (void *)val, count, false); | |
4477 | } | |
4478 | ||
bbd9b64e CO |
4479 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
4480 | { | |
4481 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
4482 | } | |
4483 | ||
3cb16fe7 | 4484 | static void emulator_invlpg(struct x86_emulate_ctxt *ctxt, ulong address) |
bbd9b64e | 4485 | { |
3cb16fe7 | 4486 | kvm_mmu_invlpg(emul_to_vcpu(ctxt), address); |
bbd9b64e CO |
4487 | } |
4488 | ||
f5f48ee1 SY |
4489 | int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu) |
4490 | { | |
4491 | if (!need_emulate_wbinvd(vcpu)) | |
4492 | return X86EMUL_CONTINUE; | |
4493 | ||
4494 | if (kvm_x86_ops->has_wbinvd_exit()) { | |
2eec7343 JK |
4495 | int cpu = get_cpu(); |
4496 | ||
4497 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
f5f48ee1 SY |
4498 | smp_call_function_many(vcpu->arch.wbinvd_dirty_mask, |
4499 | wbinvd_ipi, NULL, 1); | |
2eec7343 | 4500 | put_cpu(); |
f5f48ee1 | 4501 | cpumask_clear(vcpu->arch.wbinvd_dirty_mask); |
2eec7343 JK |
4502 | } else |
4503 | wbinvd(); | |
f5f48ee1 SY |
4504 | return X86EMUL_CONTINUE; |
4505 | } | |
4506 | EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd); | |
4507 | ||
bcaf5cc5 AK |
4508 | static void emulator_wbinvd(struct x86_emulate_ctxt *ctxt) |
4509 | { | |
4510 | kvm_emulate_wbinvd(emul_to_vcpu(ctxt)); | |
4511 | } | |
4512 | ||
717746e3 | 4513 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) |
bbd9b64e | 4514 | { |
717746e3 | 4515 | return _kvm_get_dr(emul_to_vcpu(ctxt), dr, dest); |
bbd9b64e CO |
4516 | } |
4517 | ||
717746e3 | 4518 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) |
bbd9b64e | 4519 | { |
338dbc97 | 4520 | |
717746e3 | 4521 | return __kvm_set_dr(emul_to_vcpu(ctxt), dr, value); |
bbd9b64e CO |
4522 | } |
4523 | ||
52a46617 | 4524 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
5fdbf976 | 4525 | { |
52a46617 | 4526 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
5fdbf976 MT |
4527 | } |
4528 | ||
717746e3 | 4529 | static unsigned long emulator_get_cr(struct x86_emulate_ctxt *ctxt, int cr) |
bbd9b64e | 4530 | { |
717746e3 | 4531 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
52a46617 GN |
4532 | unsigned long value; |
4533 | ||
4534 | switch (cr) { | |
4535 | case 0: | |
4536 | value = kvm_read_cr0(vcpu); | |
4537 | break; | |
4538 | case 2: | |
4539 | value = vcpu->arch.cr2; | |
4540 | break; | |
4541 | case 3: | |
9f8fe504 | 4542 | value = kvm_read_cr3(vcpu); |
52a46617 GN |
4543 | break; |
4544 | case 4: | |
4545 | value = kvm_read_cr4(vcpu); | |
4546 | break; | |
4547 | case 8: | |
4548 | value = kvm_get_cr8(vcpu); | |
4549 | break; | |
4550 | default: | |
a737f256 | 4551 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
52a46617 GN |
4552 | return 0; |
4553 | } | |
4554 | ||
4555 | return value; | |
4556 | } | |
4557 | ||
717746e3 | 4558 | static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val) |
52a46617 | 4559 | { |
717746e3 | 4560 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
0f12244f GN |
4561 | int res = 0; |
4562 | ||
52a46617 GN |
4563 | switch (cr) { |
4564 | case 0: | |
49a9b07e | 4565 | res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
52a46617 GN |
4566 | break; |
4567 | case 2: | |
4568 | vcpu->arch.cr2 = val; | |
4569 | break; | |
4570 | case 3: | |
2390218b | 4571 | res = kvm_set_cr3(vcpu, val); |
52a46617 GN |
4572 | break; |
4573 | case 4: | |
a83b29c6 | 4574 | res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
52a46617 GN |
4575 | break; |
4576 | case 8: | |
eea1cff9 | 4577 | res = kvm_set_cr8(vcpu, val); |
52a46617 GN |
4578 | break; |
4579 | default: | |
a737f256 | 4580 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
0f12244f | 4581 | res = -1; |
52a46617 | 4582 | } |
0f12244f GN |
4583 | |
4584 | return res; | |
52a46617 GN |
4585 | } |
4586 | ||
4cee4798 KW |
4587 | static void emulator_set_rflags(struct x86_emulate_ctxt *ctxt, ulong val) |
4588 | { | |
4589 | kvm_set_rflags(emul_to_vcpu(ctxt), val); | |
4590 | } | |
4591 | ||
717746e3 | 4592 | static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt) |
9c537244 | 4593 | { |
717746e3 | 4594 | return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt)); |
9c537244 GN |
4595 | } |
4596 | ||
4bff1e86 | 4597 | static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
2dafc6c2 | 4598 | { |
4bff1e86 | 4599 | kvm_x86_ops->get_gdt(emul_to_vcpu(ctxt), dt); |
2dafc6c2 GN |
4600 | } |
4601 | ||
4bff1e86 | 4602 | static void emulator_get_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
160ce1f1 | 4603 | { |
4bff1e86 | 4604 | kvm_x86_ops->get_idt(emul_to_vcpu(ctxt), dt); |
160ce1f1 MG |
4605 | } |
4606 | ||
1ac9d0cf AK |
4607 | static void emulator_set_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
4608 | { | |
4609 | kvm_x86_ops->set_gdt(emul_to_vcpu(ctxt), dt); | |
4610 | } | |
4611 | ||
4612 | static void emulator_set_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) | |
4613 | { | |
4614 | kvm_x86_ops->set_idt(emul_to_vcpu(ctxt), dt); | |
4615 | } | |
4616 | ||
4bff1e86 AK |
4617 | static unsigned long emulator_get_cached_segment_base( |
4618 | struct x86_emulate_ctxt *ctxt, int seg) | |
5951c442 | 4619 | { |
4bff1e86 | 4620 | return get_segment_base(emul_to_vcpu(ctxt), seg); |
5951c442 GN |
4621 | } |
4622 | ||
1aa36616 AK |
4623 | static bool emulator_get_segment(struct x86_emulate_ctxt *ctxt, u16 *selector, |
4624 | struct desc_struct *desc, u32 *base3, | |
4625 | int seg) | |
2dafc6c2 GN |
4626 | { |
4627 | struct kvm_segment var; | |
4628 | ||
4bff1e86 | 4629 | kvm_get_segment(emul_to_vcpu(ctxt), &var, seg); |
1aa36616 | 4630 | *selector = var.selector; |
2dafc6c2 | 4631 | |
378a8b09 GN |
4632 | if (var.unusable) { |
4633 | memset(desc, 0, sizeof(*desc)); | |
2dafc6c2 | 4634 | return false; |
378a8b09 | 4635 | } |
2dafc6c2 GN |
4636 | |
4637 | if (var.g) | |
4638 | var.limit >>= 12; | |
4639 | set_desc_limit(desc, var.limit); | |
4640 | set_desc_base(desc, (unsigned long)var.base); | |
5601d05b GN |
4641 | #ifdef CONFIG_X86_64 |
4642 | if (base3) | |
4643 | *base3 = var.base >> 32; | |
4644 | #endif | |
2dafc6c2 GN |
4645 | desc->type = var.type; |
4646 | desc->s = var.s; | |
4647 | desc->dpl = var.dpl; | |
4648 | desc->p = var.present; | |
4649 | desc->avl = var.avl; | |
4650 | desc->l = var.l; | |
4651 | desc->d = var.db; | |
4652 | desc->g = var.g; | |
4653 | ||
4654 | return true; | |
4655 | } | |
4656 | ||
1aa36616 AK |
4657 | static void emulator_set_segment(struct x86_emulate_ctxt *ctxt, u16 selector, |
4658 | struct desc_struct *desc, u32 base3, | |
4659 | int seg) | |
2dafc6c2 | 4660 | { |
4bff1e86 | 4661 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
2dafc6c2 GN |
4662 | struct kvm_segment var; |
4663 | ||
1aa36616 | 4664 | var.selector = selector; |
2dafc6c2 | 4665 | var.base = get_desc_base(desc); |
5601d05b GN |
4666 | #ifdef CONFIG_X86_64 |
4667 | var.base |= ((u64)base3) << 32; | |
4668 | #endif | |
2dafc6c2 GN |
4669 | var.limit = get_desc_limit(desc); |
4670 | if (desc->g) | |
4671 | var.limit = (var.limit << 12) | 0xfff; | |
4672 | var.type = desc->type; | |
4673 | var.present = desc->p; | |
4674 | var.dpl = desc->dpl; | |
4675 | var.db = desc->d; | |
4676 | var.s = desc->s; | |
4677 | var.l = desc->l; | |
4678 | var.g = desc->g; | |
4679 | var.avl = desc->avl; | |
4680 | var.present = desc->p; | |
4681 | var.unusable = !var.present; | |
4682 | var.padding = 0; | |
4683 | ||
4684 | kvm_set_segment(vcpu, &var, seg); | |
4685 | return; | |
4686 | } | |
4687 | ||
717746e3 AK |
4688 | static int emulator_get_msr(struct x86_emulate_ctxt *ctxt, |
4689 | u32 msr_index, u64 *pdata) | |
4690 | { | |
4691 | return kvm_get_msr(emul_to_vcpu(ctxt), msr_index, pdata); | |
4692 | } | |
4693 | ||
4694 | static int emulator_set_msr(struct x86_emulate_ctxt *ctxt, | |
4695 | u32 msr_index, u64 data) | |
4696 | { | |
8fe8ab46 WA |
4697 | struct msr_data msr; |
4698 | ||
4699 | msr.data = data; | |
4700 | msr.index = msr_index; | |
4701 | msr.host_initiated = false; | |
4702 | return kvm_set_msr(emul_to_vcpu(ctxt), &msr); | |
717746e3 AK |
4703 | } |
4704 | ||
222d21aa AK |
4705 | static int emulator_read_pmc(struct x86_emulate_ctxt *ctxt, |
4706 | u32 pmc, u64 *pdata) | |
4707 | { | |
4708 | return kvm_pmu_read_pmc(emul_to_vcpu(ctxt), pmc, pdata); | |
4709 | } | |
4710 | ||
6c3287f7 AK |
4711 | static void emulator_halt(struct x86_emulate_ctxt *ctxt) |
4712 | { | |
4713 | emul_to_vcpu(ctxt)->arch.halt_request = 1; | |
4714 | } | |
4715 | ||
5037f6f3 AK |
4716 | static void emulator_get_fpu(struct x86_emulate_ctxt *ctxt) |
4717 | { | |
4718 | preempt_disable(); | |
5197b808 | 4719 | kvm_load_guest_fpu(emul_to_vcpu(ctxt)); |
5037f6f3 AK |
4720 | /* |
4721 | * CR0.TS may reference the host fpu state, not the guest fpu state, | |
4722 | * so it may be clear at this point. | |
4723 | */ | |
4724 | clts(); | |
4725 | } | |
4726 | ||
4727 | static void emulator_put_fpu(struct x86_emulate_ctxt *ctxt) | |
4728 | { | |
4729 | preempt_enable(); | |
4730 | } | |
4731 | ||
2953538e | 4732 | static int emulator_intercept(struct x86_emulate_ctxt *ctxt, |
8a76d7f2 | 4733 | struct x86_instruction_info *info, |
c4f035c6 AK |
4734 | enum x86_intercept_stage stage) |
4735 | { | |
2953538e | 4736 | return kvm_x86_ops->check_intercept(emul_to_vcpu(ctxt), info, stage); |
c4f035c6 AK |
4737 | } |
4738 | ||
0017f93a | 4739 | static void emulator_get_cpuid(struct x86_emulate_ctxt *ctxt, |
bdb42f5a SB |
4740 | u32 *eax, u32 *ebx, u32 *ecx, u32 *edx) |
4741 | { | |
0017f93a | 4742 | kvm_cpuid(emul_to_vcpu(ctxt), eax, ebx, ecx, edx); |
bdb42f5a SB |
4743 | } |
4744 | ||
dd856efa AK |
4745 | static ulong emulator_read_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg) |
4746 | { | |
4747 | return kvm_register_read(emul_to_vcpu(ctxt), reg); | |
4748 | } | |
4749 | ||
4750 | static void emulator_write_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg, ulong val) | |
4751 | { | |
4752 | kvm_register_write(emul_to_vcpu(ctxt), reg, val); | |
4753 | } | |
4754 | ||
0225fb50 | 4755 | static const struct x86_emulate_ops emulate_ops = { |
dd856efa AK |
4756 | .read_gpr = emulator_read_gpr, |
4757 | .write_gpr = emulator_write_gpr, | |
1871c602 | 4758 | .read_std = kvm_read_guest_virt_system, |
2dafc6c2 | 4759 | .write_std = kvm_write_guest_virt_system, |
1871c602 | 4760 | .fetch = kvm_fetch_guest_virt, |
bbd9b64e CO |
4761 | .read_emulated = emulator_read_emulated, |
4762 | .write_emulated = emulator_write_emulated, | |
4763 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
3cb16fe7 | 4764 | .invlpg = emulator_invlpg, |
cf8f70bf GN |
4765 | .pio_in_emulated = emulator_pio_in_emulated, |
4766 | .pio_out_emulated = emulator_pio_out_emulated, | |
1aa36616 AK |
4767 | .get_segment = emulator_get_segment, |
4768 | .set_segment = emulator_set_segment, | |
5951c442 | 4769 | .get_cached_segment_base = emulator_get_cached_segment_base, |
2dafc6c2 | 4770 | .get_gdt = emulator_get_gdt, |
160ce1f1 | 4771 | .get_idt = emulator_get_idt, |
1ac9d0cf AK |
4772 | .set_gdt = emulator_set_gdt, |
4773 | .set_idt = emulator_set_idt, | |
52a46617 GN |
4774 | .get_cr = emulator_get_cr, |
4775 | .set_cr = emulator_set_cr, | |
4cee4798 | 4776 | .set_rflags = emulator_set_rflags, |
9c537244 | 4777 | .cpl = emulator_get_cpl, |
35aa5375 GN |
4778 | .get_dr = emulator_get_dr, |
4779 | .set_dr = emulator_set_dr, | |
717746e3 AK |
4780 | .set_msr = emulator_set_msr, |
4781 | .get_msr = emulator_get_msr, | |
222d21aa | 4782 | .read_pmc = emulator_read_pmc, |
6c3287f7 | 4783 | .halt = emulator_halt, |
bcaf5cc5 | 4784 | .wbinvd = emulator_wbinvd, |
d6aa1000 | 4785 | .fix_hypercall = emulator_fix_hypercall, |
5037f6f3 AK |
4786 | .get_fpu = emulator_get_fpu, |
4787 | .put_fpu = emulator_put_fpu, | |
c4f035c6 | 4788 | .intercept = emulator_intercept, |
bdb42f5a | 4789 | .get_cpuid = emulator_get_cpuid, |
bbd9b64e CO |
4790 | }; |
4791 | ||
95cb2295 GN |
4792 | static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |
4793 | { | |
4794 | u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu, mask); | |
4795 | /* | |
4796 | * an sti; sti; sequence only disable interrupts for the first | |
4797 | * instruction. So, if the last instruction, be it emulated or | |
4798 | * not, left the system with the INT_STI flag enabled, it | |
4799 | * means that the last instruction is an sti. We should not | |
4800 | * leave the flag on in this case. The same goes for mov ss | |
4801 | */ | |
4802 | if (!(int_shadow & mask)) | |
4803 | kvm_x86_ops->set_interrupt_shadow(vcpu, mask); | |
4804 | } | |
4805 | ||
54b8486f GN |
4806 | static void inject_emulated_exception(struct kvm_vcpu *vcpu) |
4807 | { | |
4808 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; | |
da9cb575 | 4809 | if (ctxt->exception.vector == PF_VECTOR) |
6389ee94 | 4810 | kvm_propagate_fault(vcpu, &ctxt->exception); |
da9cb575 AK |
4811 | else if (ctxt->exception.error_code_valid) |
4812 | kvm_queue_exception_e(vcpu, ctxt->exception.vector, | |
4813 | ctxt->exception.error_code); | |
54b8486f | 4814 | else |
da9cb575 | 4815 | kvm_queue_exception(vcpu, ctxt->exception.vector); |
54b8486f GN |
4816 | } |
4817 | ||
dd856efa | 4818 | static void init_decode_cache(struct x86_emulate_ctxt *ctxt) |
b5c9ff73 | 4819 | { |
1ce19dc1 BP |
4820 | memset(&ctxt->opcode_len, 0, |
4821 | (void *)&ctxt->_regs - (void *)&ctxt->opcode_len); | |
b5c9ff73 | 4822 | |
9dac77fa AK |
4823 | ctxt->fetch.start = 0; |
4824 | ctxt->fetch.end = 0; | |
4825 | ctxt->io_read.pos = 0; | |
4826 | ctxt->io_read.end = 0; | |
4827 | ctxt->mem_read.pos = 0; | |
4828 | ctxt->mem_read.end = 0; | |
b5c9ff73 TY |
4829 | } |
4830 | ||
8ec4722d MG |
4831 | static void init_emulate_ctxt(struct kvm_vcpu *vcpu) |
4832 | { | |
adf52235 | 4833 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d MG |
4834 | int cs_db, cs_l; |
4835 | ||
8ec4722d MG |
4836 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
4837 | ||
adf52235 TY |
4838 | ctxt->eflags = kvm_get_rflags(vcpu); |
4839 | ctxt->eip = kvm_rip_read(vcpu); | |
4840 | ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : | |
4841 | (ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 : | |
4842 | cs_l ? X86EMUL_MODE_PROT64 : | |
4843 | cs_db ? X86EMUL_MODE_PROT32 : | |
4844 | X86EMUL_MODE_PROT16; | |
4845 | ctxt->guest_mode = is_guest_mode(vcpu); | |
4846 | ||
dd856efa | 4847 | init_decode_cache(ctxt); |
7ae441ea | 4848 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; |
8ec4722d MG |
4849 | } |
4850 | ||
71f9833b | 4851 | int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip) |
63995653 | 4852 | { |
9d74191a | 4853 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
63995653 MG |
4854 | int ret; |
4855 | ||
4856 | init_emulate_ctxt(vcpu); | |
4857 | ||
9dac77fa AK |
4858 | ctxt->op_bytes = 2; |
4859 | ctxt->ad_bytes = 2; | |
4860 | ctxt->_eip = ctxt->eip + inc_eip; | |
9d74191a | 4861 | ret = emulate_int_real(ctxt, irq); |
63995653 MG |
4862 | |
4863 | if (ret != X86EMUL_CONTINUE) | |
4864 | return EMULATE_FAIL; | |
4865 | ||
9dac77fa | 4866 | ctxt->eip = ctxt->_eip; |
9d74191a TY |
4867 | kvm_rip_write(vcpu, ctxt->eip); |
4868 | kvm_set_rflags(vcpu, ctxt->eflags); | |
63995653 MG |
4869 | |
4870 | if (irq == NMI_VECTOR) | |
7460fb4a | 4871 | vcpu->arch.nmi_pending = 0; |
63995653 MG |
4872 | else |
4873 | vcpu->arch.interrupt.pending = false; | |
4874 | ||
4875 | return EMULATE_DONE; | |
4876 | } | |
4877 | EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt); | |
4878 | ||
6d77dbfc GN |
4879 | static int handle_emulation_failure(struct kvm_vcpu *vcpu) |
4880 | { | |
fc3a9157 JR |
4881 | int r = EMULATE_DONE; |
4882 | ||
6d77dbfc GN |
4883 | ++vcpu->stat.insn_emulation_fail; |
4884 | trace_kvm_emulate_insn_failed(vcpu); | |
fc3a9157 JR |
4885 | if (!is_guest_mode(vcpu)) { |
4886 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
4887 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
4888 | vcpu->run->internal.ndata = 0; | |
4889 | r = EMULATE_FAIL; | |
4890 | } | |
6d77dbfc | 4891 | kvm_queue_exception(vcpu, UD_VECTOR); |
fc3a9157 JR |
4892 | |
4893 | return r; | |
6d77dbfc GN |
4894 | } |
4895 | ||
93c05d3e | 4896 | static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2, |
991eebf9 GN |
4897 | bool write_fault_to_shadow_pgtable, |
4898 | int emulation_type) | |
a6f177ef | 4899 | { |
95b3cf69 | 4900 | gpa_t gpa = cr2; |
8e3d9d06 | 4901 | pfn_t pfn; |
a6f177ef | 4902 | |
991eebf9 GN |
4903 | if (emulation_type & EMULTYPE_NO_REEXECUTE) |
4904 | return false; | |
4905 | ||
95b3cf69 XG |
4906 | if (!vcpu->arch.mmu.direct_map) { |
4907 | /* | |
4908 | * Write permission should be allowed since only | |
4909 | * write access need to be emulated. | |
4910 | */ | |
4911 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
a6f177ef | 4912 | |
95b3cf69 XG |
4913 | /* |
4914 | * If the mapping is invalid in guest, let cpu retry | |
4915 | * it to generate fault. | |
4916 | */ | |
4917 | if (gpa == UNMAPPED_GVA) | |
4918 | return true; | |
4919 | } | |
a6f177ef | 4920 | |
8e3d9d06 XG |
4921 | /* |
4922 | * Do not retry the unhandleable instruction if it faults on the | |
4923 | * readonly host memory, otherwise it will goto a infinite loop: | |
4924 | * retry instruction -> write #PF -> emulation fail -> retry | |
4925 | * instruction -> ... | |
4926 | */ | |
4927 | pfn = gfn_to_pfn(vcpu->kvm, gpa_to_gfn(gpa)); | |
95b3cf69 XG |
4928 | |
4929 | /* | |
4930 | * If the instruction failed on the error pfn, it can not be fixed, | |
4931 | * report the error to userspace. | |
4932 | */ | |
4933 | if (is_error_noslot_pfn(pfn)) | |
4934 | return false; | |
4935 | ||
4936 | kvm_release_pfn_clean(pfn); | |
4937 | ||
4938 | /* The instructions are well-emulated on direct mmu. */ | |
4939 | if (vcpu->arch.mmu.direct_map) { | |
4940 | unsigned int indirect_shadow_pages; | |
4941 | ||
4942 | spin_lock(&vcpu->kvm->mmu_lock); | |
4943 | indirect_shadow_pages = vcpu->kvm->arch.indirect_shadow_pages; | |
4944 | spin_unlock(&vcpu->kvm->mmu_lock); | |
4945 | ||
4946 | if (indirect_shadow_pages) | |
4947 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
4948 | ||
a6f177ef | 4949 | return true; |
8e3d9d06 | 4950 | } |
a6f177ef | 4951 | |
95b3cf69 XG |
4952 | /* |
4953 | * if emulation was due to access to shadowed page table | |
4954 | * and it failed try to unshadow page and re-enter the | |
4955 | * guest to let CPU execute the instruction. | |
4956 | */ | |
4957 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
93c05d3e XG |
4958 | |
4959 | /* | |
4960 | * If the access faults on its page table, it can not | |
4961 | * be fixed by unprotecting shadow page and it should | |
4962 | * be reported to userspace. | |
4963 | */ | |
4964 | return !write_fault_to_shadow_pgtable; | |
a6f177ef GN |
4965 | } |
4966 | ||
1cb3f3ae XG |
4967 | static bool retry_instruction(struct x86_emulate_ctxt *ctxt, |
4968 | unsigned long cr2, int emulation_type) | |
4969 | { | |
4970 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4971 | unsigned long last_retry_eip, last_retry_addr, gpa = cr2; | |
4972 | ||
4973 | last_retry_eip = vcpu->arch.last_retry_eip; | |
4974 | last_retry_addr = vcpu->arch.last_retry_addr; | |
4975 | ||
4976 | /* | |
4977 | * If the emulation is caused by #PF and it is non-page_table | |
4978 | * writing instruction, it means the VM-EXIT is caused by shadow | |
4979 | * page protected, we can zap the shadow page and retry this | |
4980 | * instruction directly. | |
4981 | * | |
4982 | * Note: if the guest uses a non-page-table modifying instruction | |
4983 | * on the PDE that points to the instruction, then we will unmap | |
4984 | * the instruction and go to an infinite loop. So, we cache the | |
4985 | * last retried eip and the last fault address, if we meet the eip | |
4986 | * and the address again, we can break out of the potential infinite | |
4987 | * loop. | |
4988 | */ | |
4989 | vcpu->arch.last_retry_eip = vcpu->arch.last_retry_addr = 0; | |
4990 | ||
4991 | if (!(emulation_type & EMULTYPE_RETRY)) | |
4992 | return false; | |
4993 | ||
4994 | if (x86_page_table_writing_insn(ctxt)) | |
4995 | return false; | |
4996 | ||
4997 | if (ctxt->eip == last_retry_eip && last_retry_addr == cr2) | |
4998 | return false; | |
4999 | ||
5000 | vcpu->arch.last_retry_eip = ctxt->eip; | |
5001 | vcpu->arch.last_retry_addr = cr2; | |
5002 | ||
5003 | if (!vcpu->arch.mmu.direct_map) | |
5004 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
5005 | ||
22368028 | 5006 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); |
1cb3f3ae XG |
5007 | |
5008 | return true; | |
5009 | } | |
5010 | ||
716d51ab GN |
5011 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu); |
5012 | static int complete_emulated_pio(struct kvm_vcpu *vcpu); | |
5013 | ||
4a1e10d5 PB |
5014 | static int kvm_vcpu_check_hw_bp(unsigned long addr, u32 type, u32 dr7, |
5015 | unsigned long *db) | |
5016 | { | |
5017 | u32 dr6 = 0; | |
5018 | int i; | |
5019 | u32 enable, rwlen; | |
5020 | ||
5021 | enable = dr7; | |
5022 | rwlen = dr7 >> 16; | |
5023 | for (i = 0; i < 4; i++, enable >>= 2, rwlen >>= 4) | |
5024 | if ((enable & 3) && (rwlen & 15) == type && db[i] == addr) | |
5025 | dr6 |= (1 << i); | |
5026 | return dr6; | |
5027 | } | |
5028 | ||
663f4c61 PB |
5029 | static void kvm_vcpu_check_singlestep(struct kvm_vcpu *vcpu, int *r) |
5030 | { | |
5031 | struct kvm_run *kvm_run = vcpu->run; | |
5032 | ||
5033 | /* | |
5034 | * Use the "raw" value to see if TF was passed to the processor. | |
5035 | * Note that the new value of the flags has not been saved yet. | |
5036 | * | |
5037 | * This is correct even for TF set by the guest, because "the | |
5038 | * processor will not generate this exception after the instruction | |
5039 | * that sets the TF flag". | |
5040 | */ | |
5041 | unsigned long rflags = kvm_x86_ops->get_rflags(vcpu); | |
5042 | ||
5043 | if (unlikely(rflags & X86_EFLAGS_TF)) { | |
5044 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) { | |
5045 | kvm_run->debug.arch.dr6 = DR6_BS | DR6_FIXED_1; | |
5046 | kvm_run->debug.arch.pc = vcpu->arch.singlestep_rip; | |
5047 | kvm_run->debug.arch.exception = DB_VECTOR; | |
5048 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
5049 | *r = EMULATE_USER_EXIT; | |
5050 | } else { | |
5051 | vcpu->arch.emulate_ctxt.eflags &= ~X86_EFLAGS_TF; | |
5052 | /* | |
5053 | * "Certain debug exceptions may clear bit 0-3. The | |
5054 | * remaining contents of the DR6 register are never | |
5055 | * cleared by the processor". | |
5056 | */ | |
5057 | vcpu->arch.dr6 &= ~15; | |
5058 | vcpu->arch.dr6 |= DR6_BS; | |
5059 | kvm_queue_exception(vcpu, DB_VECTOR); | |
5060 | } | |
5061 | } | |
5062 | } | |
5063 | ||
4a1e10d5 PB |
5064 | static bool kvm_vcpu_check_breakpoint(struct kvm_vcpu *vcpu, int *r) |
5065 | { | |
5066 | struct kvm_run *kvm_run = vcpu->run; | |
5067 | unsigned long eip = vcpu->arch.emulate_ctxt.eip; | |
5068 | u32 dr6 = 0; | |
5069 | ||
5070 | if (unlikely(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) && | |
5071 | (vcpu->arch.guest_debug_dr7 & DR7_BP_EN_MASK)) { | |
5072 | dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
5073 | vcpu->arch.guest_debug_dr7, | |
5074 | vcpu->arch.eff_db); | |
5075 | ||
5076 | if (dr6 != 0) { | |
5077 | kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1; | |
5078 | kvm_run->debug.arch.pc = kvm_rip_read(vcpu) + | |
5079 | get_segment_base(vcpu, VCPU_SREG_CS); | |
5080 | ||
5081 | kvm_run->debug.arch.exception = DB_VECTOR; | |
5082 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
5083 | *r = EMULATE_USER_EXIT; | |
5084 | return true; | |
5085 | } | |
5086 | } | |
5087 | ||
5088 | if (unlikely(vcpu->arch.dr7 & DR7_BP_EN_MASK)) { | |
5089 | dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
5090 | vcpu->arch.dr7, | |
5091 | vcpu->arch.db); | |
5092 | ||
5093 | if (dr6 != 0) { | |
5094 | vcpu->arch.dr6 &= ~15; | |
5095 | vcpu->arch.dr6 |= dr6; | |
5096 | kvm_queue_exception(vcpu, DB_VECTOR); | |
5097 | *r = EMULATE_DONE; | |
5098 | return true; | |
5099 | } | |
5100 | } | |
5101 | ||
5102 | return false; | |
5103 | } | |
5104 | ||
51d8b661 AP |
5105 | int x86_emulate_instruction(struct kvm_vcpu *vcpu, |
5106 | unsigned long cr2, | |
dc25e89e AP |
5107 | int emulation_type, |
5108 | void *insn, | |
5109 | int insn_len) | |
bbd9b64e | 5110 | { |
95cb2295 | 5111 | int r; |
9d74191a | 5112 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
7ae441ea | 5113 | bool writeback = true; |
93c05d3e | 5114 | bool write_fault_to_spt = vcpu->arch.write_fault_to_shadow_pgtable; |
bbd9b64e | 5115 | |
93c05d3e XG |
5116 | /* |
5117 | * Clear write_fault_to_shadow_pgtable here to ensure it is | |
5118 | * never reused. | |
5119 | */ | |
5120 | vcpu->arch.write_fault_to_shadow_pgtable = false; | |
26eef70c | 5121 | kvm_clear_exception_queue(vcpu); |
8d7d8102 | 5122 | |
571008da | 5123 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
8ec4722d | 5124 | init_emulate_ctxt(vcpu); |
4a1e10d5 PB |
5125 | |
5126 | /* | |
5127 | * We will reenter on the same instruction since | |
5128 | * we do not set complete_userspace_io. This does not | |
5129 | * handle watchpoints yet, those would be handled in | |
5130 | * the emulate_ops. | |
5131 | */ | |
5132 | if (kvm_vcpu_check_breakpoint(vcpu, &r)) | |
5133 | return r; | |
5134 | ||
9d74191a TY |
5135 | ctxt->interruptibility = 0; |
5136 | ctxt->have_exception = false; | |
5137 | ctxt->perm_ok = false; | |
bbd9b64e | 5138 | |
b51e974f | 5139 | ctxt->ud = emulation_type & EMULTYPE_TRAP_UD; |
4005996e | 5140 | |
9d74191a | 5141 | r = x86_decode_insn(ctxt, insn, insn_len); |
bbd9b64e | 5142 | |
e46479f8 | 5143 | trace_kvm_emulate_insn_start(vcpu); |
f2b5756b | 5144 | ++vcpu->stat.insn_emulation; |
1d2887e2 | 5145 | if (r != EMULATION_OK) { |
4005996e AK |
5146 | if (emulation_type & EMULTYPE_TRAP_UD) |
5147 | return EMULATE_FAIL; | |
991eebf9 GN |
5148 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
5149 | emulation_type)) | |
bbd9b64e | 5150 | return EMULATE_DONE; |
6d77dbfc GN |
5151 | if (emulation_type & EMULTYPE_SKIP) |
5152 | return EMULATE_FAIL; | |
5153 | return handle_emulation_failure(vcpu); | |
bbd9b64e CO |
5154 | } |
5155 | } | |
5156 | ||
ba8afb6b | 5157 | if (emulation_type & EMULTYPE_SKIP) { |
9dac77fa | 5158 | kvm_rip_write(vcpu, ctxt->_eip); |
ba8afb6b GN |
5159 | return EMULATE_DONE; |
5160 | } | |
5161 | ||
1cb3f3ae XG |
5162 | if (retry_instruction(ctxt, cr2, emulation_type)) |
5163 | return EMULATE_DONE; | |
5164 | ||
7ae441ea | 5165 | /* this is needed for vmware backdoor interface to work since it |
4d2179e1 | 5166 | changes registers values during IO operation */ |
7ae441ea GN |
5167 | if (vcpu->arch.emulate_regs_need_sync_from_vcpu) { |
5168 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; | |
dd856efa | 5169 | emulator_invalidate_register_cache(ctxt); |
7ae441ea | 5170 | } |
4d2179e1 | 5171 | |
5cd21917 | 5172 | restart: |
9d74191a | 5173 | r = x86_emulate_insn(ctxt); |
bbd9b64e | 5174 | |
775fde86 JR |
5175 | if (r == EMULATION_INTERCEPTED) |
5176 | return EMULATE_DONE; | |
5177 | ||
d2ddd1c4 | 5178 | if (r == EMULATION_FAILED) { |
991eebf9 GN |
5179 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
5180 | emulation_type)) | |
c3cd7ffa GN |
5181 | return EMULATE_DONE; |
5182 | ||
6d77dbfc | 5183 | return handle_emulation_failure(vcpu); |
bbd9b64e CO |
5184 | } |
5185 | ||
9d74191a | 5186 | if (ctxt->have_exception) { |
54b8486f | 5187 | inject_emulated_exception(vcpu); |
d2ddd1c4 GN |
5188 | r = EMULATE_DONE; |
5189 | } else if (vcpu->arch.pio.count) { | |
0912c977 PB |
5190 | if (!vcpu->arch.pio.in) { |
5191 | /* FIXME: return into emulator if single-stepping. */ | |
3457e419 | 5192 | vcpu->arch.pio.count = 0; |
0912c977 | 5193 | } else { |
7ae441ea | 5194 | writeback = false; |
716d51ab GN |
5195 | vcpu->arch.complete_userspace_io = complete_emulated_pio; |
5196 | } | |
ac0a48c3 | 5197 | r = EMULATE_USER_EXIT; |
7ae441ea GN |
5198 | } else if (vcpu->mmio_needed) { |
5199 | if (!vcpu->mmio_is_write) | |
5200 | writeback = false; | |
ac0a48c3 | 5201 | r = EMULATE_USER_EXIT; |
716d51ab | 5202 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; |
7ae441ea | 5203 | } else if (r == EMULATION_RESTART) |
5cd21917 | 5204 | goto restart; |
d2ddd1c4 GN |
5205 | else |
5206 | r = EMULATE_DONE; | |
f850e2e6 | 5207 | |
7ae441ea | 5208 | if (writeback) { |
9d74191a | 5209 | toggle_interruptibility(vcpu, ctxt->interruptibility); |
7ae441ea | 5210 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
7ae441ea | 5211 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
9d74191a | 5212 | kvm_rip_write(vcpu, ctxt->eip); |
663f4c61 PB |
5213 | if (r == EMULATE_DONE) |
5214 | kvm_vcpu_check_singlestep(vcpu, &r); | |
5215 | kvm_set_rflags(vcpu, ctxt->eflags); | |
7ae441ea GN |
5216 | } else |
5217 | vcpu->arch.emulate_regs_need_sync_to_vcpu = true; | |
e85d28f8 GN |
5218 | |
5219 | return r; | |
de7d789a | 5220 | } |
51d8b661 | 5221 | EXPORT_SYMBOL_GPL(x86_emulate_instruction); |
de7d789a | 5222 | |
cf8f70bf | 5223 | int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port) |
de7d789a | 5224 | { |
cf8f70bf | 5225 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
ca1d4a9e AK |
5226 | int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt, |
5227 | size, port, &val, 1); | |
cf8f70bf | 5228 | /* do not return to emulator after return from userspace */ |
7972995b | 5229 | vcpu->arch.pio.count = 0; |
de7d789a CO |
5230 | return ret; |
5231 | } | |
cf8f70bf | 5232 | EXPORT_SYMBOL_GPL(kvm_fast_pio_out); |
de7d789a | 5233 | |
8cfdc000 ZA |
5234 | static void tsc_bad(void *info) |
5235 | { | |
0a3aee0d | 5236 | __this_cpu_write(cpu_tsc_khz, 0); |
8cfdc000 ZA |
5237 | } |
5238 | ||
5239 | static void tsc_khz_changed(void *data) | |
c8076604 | 5240 | { |
8cfdc000 ZA |
5241 | struct cpufreq_freqs *freq = data; |
5242 | unsigned long khz = 0; | |
5243 | ||
5244 | if (data) | |
5245 | khz = freq->new; | |
5246 | else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) | |
5247 | khz = cpufreq_quick_get(raw_smp_processor_id()); | |
5248 | if (!khz) | |
5249 | khz = tsc_khz; | |
0a3aee0d | 5250 | __this_cpu_write(cpu_tsc_khz, khz); |
c8076604 GH |
5251 | } |
5252 | ||
c8076604 GH |
5253 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
5254 | void *data) | |
5255 | { | |
5256 | struct cpufreq_freqs *freq = data; | |
5257 | struct kvm *kvm; | |
5258 | struct kvm_vcpu *vcpu; | |
5259 | int i, send_ipi = 0; | |
5260 | ||
8cfdc000 ZA |
5261 | /* |
5262 | * We allow guests to temporarily run on slowing clocks, | |
5263 | * provided we notify them after, or to run on accelerating | |
5264 | * clocks, provided we notify them before. Thus time never | |
5265 | * goes backwards. | |
5266 | * | |
5267 | * However, we have a problem. We can't atomically update | |
5268 | * the frequency of a given CPU from this function; it is | |
5269 | * merely a notifier, which can be called from any CPU. | |
5270 | * Changing the TSC frequency at arbitrary points in time | |
5271 | * requires a recomputation of local variables related to | |
5272 | * the TSC for each VCPU. We must flag these local variables | |
5273 | * to be updated and be sure the update takes place with the | |
5274 | * new frequency before any guests proceed. | |
5275 | * | |
5276 | * Unfortunately, the combination of hotplug CPU and frequency | |
5277 | * change creates an intractable locking scenario; the order | |
5278 | * of when these callouts happen is undefined with respect to | |
5279 | * CPU hotplug, and they can race with each other. As such, | |
5280 | * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is | |
5281 | * undefined; you can actually have a CPU frequency change take | |
5282 | * place in between the computation of X and the setting of the | |
5283 | * variable. To protect against this problem, all updates of | |
5284 | * the per_cpu tsc_khz variable are done in an interrupt | |
5285 | * protected IPI, and all callers wishing to update the value | |
5286 | * must wait for a synchronous IPI to complete (which is trivial | |
5287 | * if the caller is on the CPU already). This establishes the | |
5288 | * necessary total order on variable updates. | |
5289 | * | |
5290 | * Note that because a guest time update may take place | |
5291 | * anytime after the setting of the VCPU's request bit, the | |
5292 | * correct TSC value must be set before the request. However, | |
5293 | * to ensure the update actually makes it to any guest which | |
5294 | * starts running in hardware virtualization between the set | |
5295 | * and the acquisition of the spinlock, we must also ping the | |
5296 | * CPU after setting the request bit. | |
5297 | * | |
5298 | */ | |
5299 | ||
c8076604 GH |
5300 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
5301 | return 0; | |
5302 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
5303 | return 0; | |
8cfdc000 ZA |
5304 | |
5305 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); | |
c8076604 | 5306 | |
2f303b74 | 5307 | spin_lock(&kvm_lock); |
c8076604 | 5308 | list_for_each_entry(kvm, &vm_list, vm_list) { |
988a2cae | 5309 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
5310 | if (vcpu->cpu != freq->cpu) |
5311 | continue; | |
c285545f | 5312 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
c8076604 | 5313 | if (vcpu->cpu != smp_processor_id()) |
8cfdc000 | 5314 | send_ipi = 1; |
c8076604 GH |
5315 | } |
5316 | } | |
2f303b74 | 5317 | spin_unlock(&kvm_lock); |
c8076604 GH |
5318 | |
5319 | if (freq->old < freq->new && send_ipi) { | |
5320 | /* | |
5321 | * We upscale the frequency. Must make the guest | |
5322 | * doesn't see old kvmclock values while running with | |
5323 | * the new frequency, otherwise we risk the guest sees | |
5324 | * time go backwards. | |
5325 | * | |
5326 | * In case we update the frequency for another cpu | |
5327 | * (which might be in guest context) send an interrupt | |
5328 | * to kick the cpu out of guest context. Next time | |
5329 | * guest context is entered kvmclock will be updated, | |
5330 | * so the guest will not see stale values. | |
5331 | */ | |
8cfdc000 | 5332 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); |
c8076604 GH |
5333 | } |
5334 | return 0; | |
5335 | } | |
5336 | ||
5337 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
8cfdc000 ZA |
5338 | .notifier_call = kvmclock_cpufreq_notifier |
5339 | }; | |
5340 | ||
5341 | static int kvmclock_cpu_notifier(struct notifier_block *nfb, | |
5342 | unsigned long action, void *hcpu) | |
5343 | { | |
5344 | unsigned int cpu = (unsigned long)hcpu; | |
5345 | ||
5346 | switch (action) { | |
5347 | case CPU_ONLINE: | |
5348 | case CPU_DOWN_FAILED: | |
5349 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
5350 | break; | |
5351 | case CPU_DOWN_PREPARE: | |
5352 | smp_call_function_single(cpu, tsc_bad, NULL, 1); | |
5353 | break; | |
5354 | } | |
5355 | return NOTIFY_OK; | |
5356 | } | |
5357 | ||
5358 | static struct notifier_block kvmclock_cpu_notifier_block = { | |
5359 | .notifier_call = kvmclock_cpu_notifier, | |
5360 | .priority = -INT_MAX | |
c8076604 GH |
5361 | }; |
5362 | ||
b820cc0c ZA |
5363 | static void kvm_timer_init(void) |
5364 | { | |
5365 | int cpu; | |
5366 | ||
c285545f | 5367 | max_tsc_khz = tsc_khz; |
8cfdc000 | 5368 | register_hotcpu_notifier(&kvmclock_cpu_notifier_block); |
b820cc0c | 5369 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
c285545f ZA |
5370 | #ifdef CONFIG_CPU_FREQ |
5371 | struct cpufreq_policy policy; | |
5372 | memset(&policy, 0, sizeof(policy)); | |
3e26f230 AK |
5373 | cpu = get_cpu(); |
5374 | cpufreq_get_policy(&policy, cpu); | |
c285545f ZA |
5375 | if (policy.cpuinfo.max_freq) |
5376 | max_tsc_khz = policy.cpuinfo.max_freq; | |
3e26f230 | 5377 | put_cpu(); |
c285545f | 5378 | #endif |
b820cc0c ZA |
5379 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
5380 | CPUFREQ_TRANSITION_NOTIFIER); | |
5381 | } | |
c285545f | 5382 | pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz); |
8cfdc000 ZA |
5383 | for_each_online_cpu(cpu) |
5384 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
b820cc0c ZA |
5385 | } |
5386 | ||
ff9d07a0 ZY |
5387 | static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
5388 | ||
f5132b01 | 5389 | int kvm_is_in_guest(void) |
ff9d07a0 | 5390 | { |
086c9855 | 5391 | return __this_cpu_read(current_vcpu) != NULL; |
ff9d07a0 ZY |
5392 | } |
5393 | ||
5394 | static int kvm_is_user_mode(void) | |
5395 | { | |
5396 | int user_mode = 3; | |
dcf46b94 | 5397 | |
086c9855 AS |
5398 | if (__this_cpu_read(current_vcpu)) |
5399 | user_mode = kvm_x86_ops->get_cpl(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 5400 | |
ff9d07a0 ZY |
5401 | return user_mode != 0; |
5402 | } | |
5403 | ||
5404 | static unsigned long kvm_get_guest_ip(void) | |
5405 | { | |
5406 | unsigned long ip = 0; | |
dcf46b94 | 5407 | |
086c9855 AS |
5408 | if (__this_cpu_read(current_vcpu)) |
5409 | ip = kvm_rip_read(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 5410 | |
ff9d07a0 ZY |
5411 | return ip; |
5412 | } | |
5413 | ||
5414 | static struct perf_guest_info_callbacks kvm_guest_cbs = { | |
5415 | .is_in_guest = kvm_is_in_guest, | |
5416 | .is_user_mode = kvm_is_user_mode, | |
5417 | .get_guest_ip = kvm_get_guest_ip, | |
5418 | }; | |
5419 | ||
5420 | void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) | |
5421 | { | |
086c9855 | 5422 | __this_cpu_write(current_vcpu, vcpu); |
ff9d07a0 ZY |
5423 | } |
5424 | EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); | |
5425 | ||
5426 | void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) | |
5427 | { | |
086c9855 | 5428 | __this_cpu_write(current_vcpu, NULL); |
ff9d07a0 ZY |
5429 | } |
5430 | EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); | |
5431 | ||
ce88decf XG |
5432 | static void kvm_set_mmio_spte_mask(void) |
5433 | { | |
5434 | u64 mask; | |
5435 | int maxphyaddr = boot_cpu_data.x86_phys_bits; | |
5436 | ||
5437 | /* | |
5438 | * Set the reserved bits and the present bit of an paging-structure | |
5439 | * entry to generate page fault with PFER.RSV = 1. | |
5440 | */ | |
885032b9 XG |
5441 | /* Mask the reserved physical address bits. */ |
5442 | mask = ((1ull << (51 - maxphyaddr + 1)) - 1) << maxphyaddr; | |
5443 | ||
5444 | /* Bit 62 is always reserved for 32bit host. */ | |
5445 | mask |= 0x3ull << 62; | |
5446 | ||
5447 | /* Set the present bit. */ | |
ce88decf XG |
5448 | mask |= 1ull; |
5449 | ||
5450 | #ifdef CONFIG_X86_64 | |
5451 | /* | |
5452 | * If reserved bit is not supported, clear the present bit to disable | |
5453 | * mmio page fault. | |
5454 | */ | |
5455 | if (maxphyaddr == 52) | |
5456 | mask &= ~1ull; | |
5457 | #endif | |
5458 | ||
5459 | kvm_mmu_set_mmio_spte_mask(mask); | |
5460 | } | |
5461 | ||
16e8d74d MT |
5462 | #ifdef CONFIG_X86_64 |
5463 | static void pvclock_gtod_update_fn(struct work_struct *work) | |
5464 | { | |
d828199e MT |
5465 | struct kvm *kvm; |
5466 | ||
5467 | struct kvm_vcpu *vcpu; | |
5468 | int i; | |
5469 | ||
2f303b74 | 5470 | spin_lock(&kvm_lock); |
d828199e MT |
5471 | list_for_each_entry(kvm, &vm_list, vm_list) |
5472 | kvm_for_each_vcpu(i, vcpu, kvm) | |
5473 | set_bit(KVM_REQ_MASTERCLOCK_UPDATE, &vcpu->requests); | |
5474 | atomic_set(&kvm_guest_has_master_clock, 0); | |
2f303b74 | 5475 | spin_unlock(&kvm_lock); |
16e8d74d MT |
5476 | } |
5477 | ||
5478 | static DECLARE_WORK(pvclock_gtod_work, pvclock_gtod_update_fn); | |
5479 | ||
5480 | /* | |
5481 | * Notification about pvclock gtod data update. | |
5482 | */ | |
5483 | static int pvclock_gtod_notify(struct notifier_block *nb, unsigned long unused, | |
5484 | void *priv) | |
5485 | { | |
5486 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
5487 | struct timekeeper *tk = priv; | |
5488 | ||
5489 | update_pvclock_gtod(tk); | |
5490 | ||
5491 | /* disable master clock if host does not trust, or does not | |
5492 | * use, TSC clocksource | |
5493 | */ | |
5494 | if (gtod->clock.vclock_mode != VCLOCK_TSC && | |
5495 | atomic_read(&kvm_guest_has_master_clock) != 0) | |
5496 | queue_work(system_long_wq, &pvclock_gtod_work); | |
5497 | ||
5498 | return 0; | |
5499 | } | |
5500 | ||
5501 | static struct notifier_block pvclock_gtod_notifier = { | |
5502 | .notifier_call = pvclock_gtod_notify, | |
5503 | }; | |
5504 | #endif | |
5505 | ||
f8c16bba | 5506 | int kvm_arch_init(void *opaque) |
043405e1 | 5507 | { |
b820cc0c | 5508 | int r; |
6b61edf7 | 5509 | struct kvm_x86_ops *ops = opaque; |
f8c16bba | 5510 | |
f8c16bba ZX |
5511 | if (kvm_x86_ops) { |
5512 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
5513 | r = -EEXIST; |
5514 | goto out; | |
f8c16bba ZX |
5515 | } |
5516 | ||
5517 | if (!ops->cpu_has_kvm_support()) { | |
5518 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
5519 | r = -EOPNOTSUPP; |
5520 | goto out; | |
f8c16bba ZX |
5521 | } |
5522 | if (ops->disabled_by_bios()) { | |
5523 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
5524 | r = -EOPNOTSUPP; |
5525 | goto out; | |
f8c16bba ZX |
5526 | } |
5527 | ||
013f6a5d MT |
5528 | r = -ENOMEM; |
5529 | shared_msrs = alloc_percpu(struct kvm_shared_msrs); | |
5530 | if (!shared_msrs) { | |
5531 | printk(KERN_ERR "kvm: failed to allocate percpu kvm_shared_msrs\n"); | |
5532 | goto out; | |
5533 | } | |
5534 | ||
97db56ce AK |
5535 | r = kvm_mmu_module_init(); |
5536 | if (r) | |
013f6a5d | 5537 | goto out_free_percpu; |
97db56ce | 5538 | |
ce88decf | 5539 | kvm_set_mmio_spte_mask(); |
97db56ce AK |
5540 | kvm_init_msr_list(); |
5541 | ||
f8c16bba | 5542 | kvm_x86_ops = ops; |
7b52345e | 5543 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, |
4b12f0de | 5544 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
c8076604 | 5545 | |
b820cc0c | 5546 | kvm_timer_init(); |
c8076604 | 5547 | |
ff9d07a0 ZY |
5548 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
5549 | ||
2acf923e DC |
5550 | if (cpu_has_xsave) |
5551 | host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); | |
5552 | ||
c5cc421b | 5553 | kvm_lapic_init(); |
16e8d74d MT |
5554 | #ifdef CONFIG_X86_64 |
5555 | pvclock_gtod_register_notifier(&pvclock_gtod_notifier); | |
5556 | #endif | |
5557 | ||
f8c16bba | 5558 | return 0; |
56c6d28a | 5559 | |
013f6a5d MT |
5560 | out_free_percpu: |
5561 | free_percpu(shared_msrs); | |
56c6d28a | 5562 | out: |
56c6d28a | 5563 | return r; |
043405e1 | 5564 | } |
8776e519 | 5565 | |
f8c16bba ZX |
5566 | void kvm_arch_exit(void) |
5567 | { | |
ff9d07a0 ZY |
5568 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
5569 | ||
888d256e JK |
5570 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
5571 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
5572 | CPUFREQ_TRANSITION_NOTIFIER); | |
8cfdc000 | 5573 | unregister_hotcpu_notifier(&kvmclock_cpu_notifier_block); |
16e8d74d MT |
5574 | #ifdef CONFIG_X86_64 |
5575 | pvclock_gtod_unregister_notifier(&pvclock_gtod_notifier); | |
5576 | #endif | |
f8c16bba | 5577 | kvm_x86_ops = NULL; |
56c6d28a | 5578 | kvm_mmu_module_exit(); |
013f6a5d | 5579 | free_percpu(shared_msrs); |
56c6d28a | 5580 | } |
f8c16bba | 5581 | |
8776e519 HB |
5582 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
5583 | { | |
5584 | ++vcpu->stat.halt_exits; | |
5585 | if (irqchip_in_kernel(vcpu->kvm)) { | |
a4535290 | 5586 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
5587 | return 1; |
5588 | } else { | |
5589 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
5590 | return 0; | |
5591 | } | |
5592 | } | |
5593 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
5594 | ||
55cd8e5a GN |
5595 | int kvm_hv_hypercall(struct kvm_vcpu *vcpu) |
5596 | { | |
5597 | u64 param, ingpa, outgpa, ret; | |
5598 | uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0; | |
5599 | bool fast, longmode; | |
5600 | int cs_db, cs_l; | |
5601 | ||
5602 | /* | |
5603 | * hypercall generates UD from non zero cpl and real mode | |
5604 | * per HYPER-V spec | |
5605 | */ | |
3eeb3288 | 5606 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) { |
55cd8e5a GN |
5607 | kvm_queue_exception(vcpu, UD_VECTOR); |
5608 | return 0; | |
5609 | } | |
5610 | ||
5611 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
5612 | longmode = is_long_mode(vcpu) && cs_l == 1; | |
5613 | ||
5614 | if (!longmode) { | |
ccd46936 GN |
5615 | param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) | |
5616 | (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff); | |
5617 | ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) | | |
5618 | (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff); | |
5619 | outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) | | |
5620 | (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff); | |
55cd8e5a GN |
5621 | } |
5622 | #ifdef CONFIG_X86_64 | |
5623 | else { | |
5624 | param = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5625 | ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
5626 | outgpa = kvm_register_read(vcpu, VCPU_REGS_R8); | |
5627 | } | |
5628 | #endif | |
5629 | ||
5630 | code = param & 0xffff; | |
5631 | fast = (param >> 16) & 0x1; | |
5632 | rep_cnt = (param >> 32) & 0xfff; | |
5633 | rep_idx = (param >> 48) & 0xfff; | |
5634 | ||
5635 | trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa); | |
5636 | ||
c25bc163 GN |
5637 | switch (code) { |
5638 | case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT: | |
5639 | kvm_vcpu_on_spin(vcpu); | |
5640 | break; | |
5641 | default: | |
5642 | res = HV_STATUS_INVALID_HYPERCALL_CODE; | |
5643 | break; | |
5644 | } | |
55cd8e5a GN |
5645 | |
5646 | ret = res | (((u64)rep_done & 0xfff) << 32); | |
5647 | if (longmode) { | |
5648 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); | |
5649 | } else { | |
5650 | kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32); | |
5651 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff); | |
5652 | } | |
5653 | ||
5654 | return 1; | |
5655 | } | |
5656 | ||
6aef266c SV |
5657 | /* |
5658 | * kvm_pv_kick_cpu_op: Kick a vcpu. | |
5659 | * | |
5660 | * @apicid - apicid of vcpu to be kicked. | |
5661 | */ | |
5662 | static void kvm_pv_kick_cpu_op(struct kvm *kvm, unsigned long flags, int apicid) | |
5663 | { | |
24d2166b | 5664 | struct kvm_lapic_irq lapic_irq; |
6aef266c | 5665 | |
24d2166b R |
5666 | lapic_irq.shorthand = 0; |
5667 | lapic_irq.dest_mode = 0; | |
5668 | lapic_irq.dest_id = apicid; | |
6aef266c | 5669 | |
24d2166b R |
5670 | lapic_irq.delivery_mode = APIC_DM_REMRD; |
5671 | kvm_irq_delivery_to_apic(kvm, 0, &lapic_irq, NULL); | |
6aef266c SV |
5672 | } |
5673 | ||
8776e519 HB |
5674 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
5675 | { | |
5676 | unsigned long nr, a0, a1, a2, a3, ret; | |
2f333bcb | 5677 | int r = 1; |
8776e519 | 5678 | |
55cd8e5a GN |
5679 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
5680 | return kvm_hv_hypercall(vcpu); | |
5681 | ||
5fdbf976 MT |
5682 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
5683 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
5684 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5685 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
5686 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 5687 | |
229456fc | 5688 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 5689 | |
8776e519 HB |
5690 | if (!is_long_mode(vcpu)) { |
5691 | nr &= 0xFFFFFFFF; | |
5692 | a0 &= 0xFFFFFFFF; | |
5693 | a1 &= 0xFFFFFFFF; | |
5694 | a2 &= 0xFFFFFFFF; | |
5695 | a3 &= 0xFFFFFFFF; | |
5696 | } | |
5697 | ||
07708c4a JK |
5698 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
5699 | ret = -KVM_EPERM; | |
5700 | goto out; | |
5701 | } | |
5702 | ||
8776e519 | 5703 | switch (nr) { |
b93463aa AK |
5704 | case KVM_HC_VAPIC_POLL_IRQ: |
5705 | ret = 0; | |
5706 | break; | |
6aef266c SV |
5707 | case KVM_HC_KICK_CPU: |
5708 | kvm_pv_kick_cpu_op(vcpu->kvm, a0, a1); | |
5709 | ret = 0; | |
5710 | break; | |
8776e519 HB |
5711 | default: |
5712 | ret = -KVM_ENOSYS; | |
5713 | break; | |
5714 | } | |
07708c4a | 5715 | out: |
5fdbf976 | 5716 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 5717 | ++vcpu->stat.hypercalls; |
2f333bcb | 5718 | return r; |
8776e519 HB |
5719 | } |
5720 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
5721 | ||
b6785def | 5722 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) |
8776e519 | 5723 | { |
d6aa1000 | 5724 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
8776e519 | 5725 | char instruction[3]; |
5fdbf976 | 5726 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 5727 | |
8776e519 | 5728 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 5729 | |
9d74191a | 5730 | return emulator_write_emulated(ctxt, rip, instruction, 3, NULL); |
8776e519 HB |
5731 | } |
5732 | ||
b6c7a5dc HB |
5733 | /* |
5734 | * Check if userspace requested an interrupt window, and that the | |
5735 | * interrupt window is open. | |
5736 | * | |
5737 | * No need to exit to userspace if we already have an interrupt queued. | |
5738 | */ | |
851ba692 | 5739 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 5740 | { |
8061823a | 5741 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
851ba692 | 5742 | vcpu->run->request_interrupt_window && |
5df56646 | 5743 | kvm_arch_interrupt_allowed(vcpu)); |
b6c7a5dc HB |
5744 | } |
5745 | ||
851ba692 | 5746 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 5747 | { |
851ba692 AK |
5748 | struct kvm_run *kvm_run = vcpu->run; |
5749 | ||
91586a3b | 5750 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
2d3ad1f4 | 5751 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 5752 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
4531220b | 5753 | if (irqchip_in_kernel(vcpu->kvm)) |
b6c7a5dc | 5754 | kvm_run->ready_for_interrupt_injection = 1; |
4531220b | 5755 | else |
b6c7a5dc | 5756 | kvm_run->ready_for_interrupt_injection = |
fa9726b0 GN |
5757 | kvm_arch_interrupt_allowed(vcpu) && |
5758 | !kvm_cpu_has_interrupt(vcpu) && | |
5759 | !kvm_event_needs_reinjection(vcpu); | |
b6c7a5dc HB |
5760 | } |
5761 | ||
95ba8273 GN |
5762 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
5763 | { | |
5764 | int max_irr, tpr; | |
5765 | ||
5766 | if (!kvm_x86_ops->update_cr8_intercept) | |
5767 | return; | |
5768 | ||
88c808fd AK |
5769 | if (!vcpu->arch.apic) |
5770 | return; | |
5771 | ||
8db3baa2 GN |
5772 | if (!vcpu->arch.apic->vapic_addr) |
5773 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
5774 | else | |
5775 | max_irr = -1; | |
95ba8273 GN |
5776 | |
5777 | if (max_irr != -1) | |
5778 | max_irr >>= 4; | |
5779 | ||
5780 | tpr = kvm_lapic_get_cr8(vcpu); | |
5781 | ||
5782 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
5783 | } | |
5784 | ||
851ba692 | 5785 | static void inject_pending_event(struct kvm_vcpu *vcpu) |
95ba8273 GN |
5786 | { |
5787 | /* try to reinject previous events if any */ | |
b59bb7bd | 5788 | if (vcpu->arch.exception.pending) { |
5c1c85d0 AK |
5789 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
5790 | vcpu->arch.exception.has_error_code, | |
5791 | vcpu->arch.exception.error_code); | |
b59bb7bd GN |
5792 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
5793 | vcpu->arch.exception.has_error_code, | |
ce7ddec4 JR |
5794 | vcpu->arch.exception.error_code, |
5795 | vcpu->arch.exception.reinject); | |
b59bb7bd GN |
5796 | return; |
5797 | } | |
5798 | ||
95ba8273 GN |
5799 | if (vcpu->arch.nmi_injected) { |
5800 | kvm_x86_ops->set_nmi(vcpu); | |
5801 | return; | |
5802 | } | |
5803 | ||
5804 | if (vcpu->arch.interrupt.pending) { | |
66fd3f7f | 5805 | kvm_x86_ops->set_irq(vcpu); |
95ba8273 GN |
5806 | return; |
5807 | } | |
5808 | ||
5809 | /* try to inject new event if pending */ | |
5810 | if (vcpu->arch.nmi_pending) { | |
5811 | if (kvm_x86_ops->nmi_allowed(vcpu)) { | |
7460fb4a | 5812 | --vcpu->arch.nmi_pending; |
95ba8273 GN |
5813 | vcpu->arch.nmi_injected = true; |
5814 | kvm_x86_ops->set_nmi(vcpu); | |
5815 | } | |
c7c9c56c | 5816 | } else if (kvm_cpu_has_injectable_intr(vcpu)) { |
95ba8273 | 5817 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { |
66fd3f7f GN |
5818 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
5819 | false); | |
5820 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
5821 | } |
5822 | } | |
5823 | } | |
5824 | ||
7460fb4a AK |
5825 | static void process_nmi(struct kvm_vcpu *vcpu) |
5826 | { | |
5827 | unsigned limit = 2; | |
5828 | ||
5829 | /* | |
5830 | * x86 is limited to one NMI running, and one NMI pending after it. | |
5831 | * If an NMI is already in progress, limit further NMIs to just one. | |
5832 | * Otherwise, allow two (and we'll inject the first one immediately). | |
5833 | */ | |
5834 | if (kvm_x86_ops->get_nmi_mask(vcpu) || vcpu->arch.nmi_injected) | |
5835 | limit = 1; | |
5836 | ||
5837 | vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0); | |
5838 | vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit); | |
5839 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
5840 | } | |
5841 | ||
3d81bc7e | 5842 | static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu) |
c7c9c56c YZ |
5843 | { |
5844 | u64 eoi_exit_bitmap[4]; | |
cf9e65b7 | 5845 | u32 tmr[8]; |
c7c9c56c | 5846 | |
3d81bc7e YZ |
5847 | if (!kvm_apic_hw_enabled(vcpu->arch.apic)) |
5848 | return; | |
c7c9c56c YZ |
5849 | |
5850 | memset(eoi_exit_bitmap, 0, 32); | |
cf9e65b7 | 5851 | memset(tmr, 0, 32); |
c7c9c56c | 5852 | |
cf9e65b7 | 5853 | kvm_ioapic_scan_entry(vcpu, eoi_exit_bitmap, tmr); |
c7c9c56c | 5854 | kvm_x86_ops->load_eoi_exitmap(vcpu, eoi_exit_bitmap); |
cf9e65b7 | 5855 | kvm_apic_update_tmr(vcpu, tmr); |
c7c9c56c YZ |
5856 | } |
5857 | ||
9357d939 TY |
5858 | /* |
5859 | * Returns 1 to let __vcpu_run() continue the guest execution loop without | |
5860 | * exiting to the userspace. Otherwise, the value will be returned to the | |
5861 | * userspace. | |
5862 | */ | |
851ba692 | 5863 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
5864 | { |
5865 | int r; | |
6a8b1d13 | 5866 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 5867 | vcpu->run->request_interrupt_window; |
730dca42 | 5868 | bool req_immediate_exit = false; |
b6c7a5dc | 5869 | |
3e007509 | 5870 | if (vcpu->requests) { |
a8eeb04a | 5871 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) |
2e53d63a | 5872 | kvm_mmu_unload(vcpu); |
a8eeb04a | 5873 | if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu)) |
2f599714 | 5874 | __kvm_migrate_timers(vcpu); |
d828199e MT |
5875 | if (kvm_check_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu)) |
5876 | kvm_gen_update_masterclock(vcpu->kvm); | |
0061d53d MT |
5877 | if (kvm_check_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu)) |
5878 | kvm_gen_kvmclock_update(vcpu); | |
34c238a1 ZA |
5879 | if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) { |
5880 | r = kvm_guest_time_update(vcpu); | |
8cfdc000 ZA |
5881 | if (unlikely(r)) |
5882 | goto out; | |
5883 | } | |
a8eeb04a | 5884 | if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu)) |
4731d4c7 | 5885 | kvm_mmu_sync_roots(vcpu); |
a8eeb04a | 5886 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) |
d4acf7e7 | 5887 | kvm_x86_ops->tlb_flush(vcpu); |
a8eeb04a | 5888 | if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) { |
851ba692 | 5889 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
5890 | r = 0; |
5891 | goto out; | |
5892 | } | |
a8eeb04a | 5893 | if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) { |
851ba692 | 5894 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
71c4dfaf JR |
5895 | r = 0; |
5896 | goto out; | |
5897 | } | |
a8eeb04a | 5898 | if (kvm_check_request(KVM_REQ_DEACTIVATE_FPU, vcpu)) { |
02daab21 AK |
5899 | vcpu->fpu_active = 0; |
5900 | kvm_x86_ops->fpu_deactivate(vcpu); | |
5901 | } | |
af585b92 GN |
5902 | if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) { |
5903 | /* Page is swapped out. Do synthetic halt */ | |
5904 | vcpu->arch.apf.halted = true; | |
5905 | r = 1; | |
5906 | goto out; | |
5907 | } | |
c9aaa895 GC |
5908 | if (kvm_check_request(KVM_REQ_STEAL_UPDATE, vcpu)) |
5909 | record_steal_time(vcpu); | |
7460fb4a AK |
5910 | if (kvm_check_request(KVM_REQ_NMI, vcpu)) |
5911 | process_nmi(vcpu); | |
f5132b01 GN |
5912 | if (kvm_check_request(KVM_REQ_PMU, vcpu)) |
5913 | kvm_handle_pmu_event(vcpu); | |
5914 | if (kvm_check_request(KVM_REQ_PMI, vcpu)) | |
5915 | kvm_deliver_pmi(vcpu); | |
3d81bc7e YZ |
5916 | if (kvm_check_request(KVM_REQ_SCAN_IOAPIC, vcpu)) |
5917 | vcpu_scan_ioapic(vcpu); | |
2f52d58c | 5918 | } |
b93463aa | 5919 | |
b463a6f7 | 5920 | if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { |
66450a21 JK |
5921 | kvm_apic_accept_events(vcpu); |
5922 | if (vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { | |
5923 | r = 1; | |
5924 | goto out; | |
5925 | } | |
5926 | ||
b463a6f7 AK |
5927 | inject_pending_event(vcpu); |
5928 | ||
5929 | /* enable NMI/IRQ window open exits if needed */ | |
7460fb4a | 5930 | if (vcpu->arch.nmi_pending) |
03b28f81 JK |
5931 | req_immediate_exit = |
5932 | kvm_x86_ops->enable_nmi_window(vcpu) != 0; | |
c7c9c56c | 5933 | else if (kvm_cpu_has_injectable_intr(vcpu) || req_int_win) |
730dca42 JK |
5934 | req_immediate_exit = |
5935 | kvm_x86_ops->enable_irq_window(vcpu) != 0; | |
b463a6f7 AK |
5936 | |
5937 | if (kvm_lapic_enabled(vcpu)) { | |
c7c9c56c YZ |
5938 | /* |
5939 | * Update architecture specific hints for APIC | |
5940 | * virtual interrupt delivery. | |
5941 | */ | |
5942 | if (kvm_x86_ops->hwapic_irr_update) | |
5943 | kvm_x86_ops->hwapic_irr_update(vcpu, | |
5944 | kvm_lapic_find_highest_irr(vcpu)); | |
b463a6f7 AK |
5945 | update_cr8_intercept(vcpu); |
5946 | kvm_lapic_sync_to_vapic(vcpu); | |
5947 | } | |
5948 | } | |
5949 | ||
d8368af8 AK |
5950 | r = kvm_mmu_reload(vcpu); |
5951 | if (unlikely(r)) { | |
d905c069 | 5952 | goto cancel_injection; |
d8368af8 AK |
5953 | } |
5954 | ||
b6c7a5dc HB |
5955 | preempt_disable(); |
5956 | ||
5957 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2608d7a1 AK |
5958 | if (vcpu->fpu_active) |
5959 | kvm_load_guest_fpu(vcpu); | |
2acf923e | 5960 | kvm_load_guest_xcr0(vcpu); |
b6c7a5dc | 5961 | |
6b7e2d09 XG |
5962 | vcpu->mode = IN_GUEST_MODE; |
5963 | ||
01b71917 MT |
5964 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
5965 | ||
6b7e2d09 XG |
5966 | /* We should set ->mode before check ->requests, |
5967 | * see the comment in make_all_cpus_request. | |
5968 | */ | |
01b71917 | 5969 | smp_mb__after_srcu_read_unlock(); |
b6c7a5dc | 5970 | |
d94e1dc9 | 5971 | local_irq_disable(); |
32f88400 | 5972 | |
6b7e2d09 | 5973 | if (vcpu->mode == EXITING_GUEST_MODE || vcpu->requests |
d94e1dc9 | 5974 | || need_resched() || signal_pending(current)) { |
6b7e2d09 | 5975 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 5976 | smp_wmb(); |
6c142801 AK |
5977 | local_irq_enable(); |
5978 | preempt_enable(); | |
01b71917 | 5979 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
6c142801 | 5980 | r = 1; |
d905c069 | 5981 | goto cancel_injection; |
6c142801 AK |
5982 | } |
5983 | ||
d6185f20 NHE |
5984 | if (req_immediate_exit) |
5985 | smp_send_reschedule(vcpu->cpu); | |
5986 | ||
b6c7a5dc HB |
5987 | kvm_guest_enter(); |
5988 | ||
42dbaa5a | 5989 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
5990 | set_debugreg(0, 7); |
5991 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
5992 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
5993 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
5994 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
5995 | } | |
b6c7a5dc | 5996 | |
229456fc | 5997 | trace_kvm_entry(vcpu->vcpu_id); |
851ba692 | 5998 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 5999 | |
24f1e32c FW |
6000 | /* |
6001 | * If the guest has used debug registers, at least dr7 | |
6002 | * will be disabled while returning to the host. | |
6003 | * If we don't have active breakpoints in the host, we don't | |
6004 | * care about the messed up debug address registers. But if | |
6005 | * we have some of them active, restore the old state. | |
6006 | */ | |
59d8eb53 | 6007 | if (hw_breakpoint_active()) |
24f1e32c | 6008 | hw_breakpoint_restore(); |
42dbaa5a | 6009 | |
886b470c MT |
6010 | vcpu->arch.last_guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu, |
6011 | native_read_tsc()); | |
1d5f066e | 6012 | |
6b7e2d09 | 6013 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 6014 | smp_wmb(); |
a547c6db YZ |
6015 | |
6016 | /* Interrupt is enabled by handle_external_intr() */ | |
6017 | kvm_x86_ops->handle_external_intr(vcpu); | |
b6c7a5dc HB |
6018 | |
6019 | ++vcpu->stat.exits; | |
6020 | ||
6021 | /* | |
6022 | * We must have an instruction between local_irq_enable() and | |
6023 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
6024 | * the interrupt shadow. The stat.exits increment will do nicely. | |
6025 | * But we need to prevent reordering, hence this barrier(): | |
6026 | */ | |
6027 | barrier(); | |
6028 | ||
6029 | kvm_guest_exit(); | |
6030 | ||
6031 | preempt_enable(); | |
6032 | ||
f656ce01 | 6033 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 6034 | |
b6c7a5dc HB |
6035 | /* |
6036 | * Profile KVM exit RIPs: | |
6037 | */ | |
6038 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
6039 | unsigned long rip = kvm_rip_read(vcpu); |
6040 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
6041 | } |
6042 | ||
cc578287 ZA |
6043 | if (unlikely(vcpu->arch.tsc_always_catchup)) |
6044 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); | |
298101da | 6045 | |
5cfb1d5a MT |
6046 | if (vcpu->arch.apic_attention) |
6047 | kvm_lapic_sync_from_vapic(vcpu); | |
b93463aa | 6048 | |
851ba692 | 6049 | r = kvm_x86_ops->handle_exit(vcpu); |
d905c069 MT |
6050 | return r; |
6051 | ||
6052 | cancel_injection: | |
6053 | kvm_x86_ops->cancel_injection(vcpu); | |
ae7a2a3f MT |
6054 | if (unlikely(vcpu->arch.apic_attention)) |
6055 | kvm_lapic_sync_from_vapic(vcpu); | |
d7690175 MT |
6056 | out: |
6057 | return r; | |
6058 | } | |
b6c7a5dc | 6059 | |
09cec754 | 6060 | |
851ba692 | 6061 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
6062 | { |
6063 | int r; | |
f656ce01 | 6064 | struct kvm *kvm = vcpu->kvm; |
d7690175 | 6065 | |
f656ce01 | 6066 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 MT |
6067 | |
6068 | r = 1; | |
6069 | while (r > 0) { | |
af585b92 GN |
6070 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
6071 | !vcpu->arch.apf.halted) | |
851ba692 | 6072 | r = vcpu_enter_guest(vcpu); |
d7690175 | 6073 | else { |
f656ce01 | 6074 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
d7690175 | 6075 | kvm_vcpu_block(vcpu); |
f656ce01 | 6076 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
66450a21 JK |
6077 | if (kvm_check_request(KVM_REQ_UNHALT, vcpu)) { |
6078 | kvm_apic_accept_events(vcpu); | |
09cec754 GN |
6079 | switch(vcpu->arch.mp_state) { |
6080 | case KVM_MP_STATE_HALTED: | |
6aef266c | 6081 | vcpu->arch.pv.pv_unhalted = false; |
d7690175 | 6082 | vcpu->arch.mp_state = |
09cec754 GN |
6083 | KVM_MP_STATE_RUNNABLE; |
6084 | case KVM_MP_STATE_RUNNABLE: | |
af585b92 | 6085 | vcpu->arch.apf.halted = false; |
09cec754 | 6086 | break; |
66450a21 JK |
6087 | case KVM_MP_STATE_INIT_RECEIVED: |
6088 | break; | |
09cec754 GN |
6089 | default: |
6090 | r = -EINTR; | |
6091 | break; | |
6092 | } | |
6093 | } | |
d7690175 MT |
6094 | } |
6095 | ||
09cec754 GN |
6096 | if (r <= 0) |
6097 | break; | |
6098 | ||
6099 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
6100 | if (kvm_cpu_has_pending_timer(vcpu)) | |
6101 | kvm_inject_pending_timer_irqs(vcpu); | |
6102 | ||
851ba692 | 6103 | if (dm_request_for_irq_injection(vcpu)) { |
09cec754 | 6104 | r = -EINTR; |
851ba692 | 6105 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
6106 | ++vcpu->stat.request_irq_exits; |
6107 | } | |
af585b92 GN |
6108 | |
6109 | kvm_check_async_pf_completion(vcpu); | |
6110 | ||
09cec754 GN |
6111 | if (signal_pending(current)) { |
6112 | r = -EINTR; | |
851ba692 | 6113 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
6114 | ++vcpu->stat.signal_exits; |
6115 | } | |
6116 | if (need_resched()) { | |
f656ce01 | 6117 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
c08ac06a | 6118 | cond_resched(); |
f656ce01 | 6119 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 6120 | } |
b6c7a5dc HB |
6121 | } |
6122 | ||
f656ce01 | 6123 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc HB |
6124 | |
6125 | return r; | |
6126 | } | |
6127 | ||
716d51ab GN |
6128 | static inline int complete_emulated_io(struct kvm_vcpu *vcpu) |
6129 | { | |
6130 | int r; | |
6131 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
6132 | r = emulate_instruction(vcpu, EMULTYPE_NO_DECODE); | |
6133 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); | |
6134 | if (r != EMULATE_DONE) | |
6135 | return 0; | |
6136 | return 1; | |
6137 | } | |
6138 | ||
6139 | static int complete_emulated_pio(struct kvm_vcpu *vcpu) | |
6140 | { | |
6141 | BUG_ON(!vcpu->arch.pio.count); | |
6142 | ||
6143 | return complete_emulated_io(vcpu); | |
6144 | } | |
6145 | ||
f78146b0 AK |
6146 | /* |
6147 | * Implements the following, as a state machine: | |
6148 | * | |
6149 | * read: | |
6150 | * for each fragment | |
87da7e66 XG |
6151 | * for each mmio piece in the fragment |
6152 | * write gpa, len | |
6153 | * exit | |
6154 | * copy data | |
f78146b0 AK |
6155 | * execute insn |
6156 | * | |
6157 | * write: | |
6158 | * for each fragment | |
87da7e66 XG |
6159 | * for each mmio piece in the fragment |
6160 | * write gpa, len | |
6161 | * copy data | |
6162 | * exit | |
f78146b0 | 6163 | */ |
716d51ab | 6164 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu) |
5287f194 AK |
6165 | { |
6166 | struct kvm_run *run = vcpu->run; | |
f78146b0 | 6167 | struct kvm_mmio_fragment *frag; |
87da7e66 | 6168 | unsigned len; |
5287f194 | 6169 | |
716d51ab | 6170 | BUG_ON(!vcpu->mmio_needed); |
5287f194 | 6171 | |
716d51ab | 6172 | /* Complete previous fragment */ |
87da7e66 XG |
6173 | frag = &vcpu->mmio_fragments[vcpu->mmio_cur_fragment]; |
6174 | len = min(8u, frag->len); | |
716d51ab | 6175 | if (!vcpu->mmio_is_write) |
87da7e66 XG |
6176 | memcpy(frag->data, run->mmio.data, len); |
6177 | ||
6178 | if (frag->len <= 8) { | |
6179 | /* Switch to the next fragment. */ | |
6180 | frag++; | |
6181 | vcpu->mmio_cur_fragment++; | |
6182 | } else { | |
6183 | /* Go forward to the next mmio piece. */ | |
6184 | frag->data += len; | |
6185 | frag->gpa += len; | |
6186 | frag->len -= len; | |
6187 | } | |
6188 | ||
716d51ab GN |
6189 | if (vcpu->mmio_cur_fragment == vcpu->mmio_nr_fragments) { |
6190 | vcpu->mmio_needed = 0; | |
0912c977 PB |
6191 | |
6192 | /* FIXME: return into emulator if single-stepping. */ | |
cef4dea0 | 6193 | if (vcpu->mmio_is_write) |
716d51ab GN |
6194 | return 1; |
6195 | vcpu->mmio_read_completed = 1; | |
6196 | return complete_emulated_io(vcpu); | |
6197 | } | |
87da7e66 | 6198 | |
716d51ab GN |
6199 | run->exit_reason = KVM_EXIT_MMIO; |
6200 | run->mmio.phys_addr = frag->gpa; | |
6201 | if (vcpu->mmio_is_write) | |
87da7e66 XG |
6202 | memcpy(run->mmio.data, frag->data, min(8u, frag->len)); |
6203 | run->mmio.len = min(8u, frag->len); | |
716d51ab GN |
6204 | run->mmio.is_write = vcpu->mmio_is_write; |
6205 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; | |
6206 | return 0; | |
5287f194 AK |
6207 | } |
6208 | ||
716d51ab | 6209 | |
b6c7a5dc HB |
6210 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
6211 | { | |
6212 | int r; | |
6213 | sigset_t sigsaved; | |
6214 | ||
e5c30142 AK |
6215 | if (!tsk_used_math(current) && init_fpu(current)) |
6216 | return -ENOMEM; | |
6217 | ||
ac9f6dc0 AK |
6218 | if (vcpu->sigset_active) |
6219 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
6220 | ||
a4535290 | 6221 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 6222 | kvm_vcpu_block(vcpu); |
66450a21 | 6223 | kvm_apic_accept_events(vcpu); |
d7690175 | 6224 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
6225 | r = -EAGAIN; |
6226 | goto out; | |
b6c7a5dc HB |
6227 | } |
6228 | ||
b6c7a5dc | 6229 | /* re-sync apic's tpr */ |
eea1cff9 AP |
6230 | if (!irqchip_in_kernel(vcpu->kvm)) { |
6231 | if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) { | |
6232 | r = -EINVAL; | |
6233 | goto out; | |
6234 | } | |
6235 | } | |
b6c7a5dc | 6236 | |
716d51ab GN |
6237 | if (unlikely(vcpu->arch.complete_userspace_io)) { |
6238 | int (*cui)(struct kvm_vcpu *) = vcpu->arch.complete_userspace_io; | |
6239 | vcpu->arch.complete_userspace_io = NULL; | |
6240 | r = cui(vcpu); | |
6241 | if (r <= 0) | |
6242 | goto out; | |
6243 | } else | |
6244 | WARN_ON(vcpu->arch.pio.count || vcpu->mmio_needed); | |
5287f194 | 6245 | |
851ba692 | 6246 | r = __vcpu_run(vcpu); |
b6c7a5dc HB |
6247 | |
6248 | out: | |
f1d86e46 | 6249 | post_kvm_run_save(vcpu); |
b6c7a5dc HB |
6250 | if (vcpu->sigset_active) |
6251 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
6252 | ||
b6c7a5dc HB |
6253 | return r; |
6254 | } | |
6255 | ||
6256 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
6257 | { | |
7ae441ea GN |
6258 | if (vcpu->arch.emulate_regs_need_sync_to_vcpu) { |
6259 | /* | |
6260 | * We are here if userspace calls get_regs() in the middle of | |
6261 | * instruction emulation. Registers state needs to be copied | |
4a969980 | 6262 | * back from emulation context to vcpu. Userspace shouldn't do |
7ae441ea GN |
6263 | * that usually, but some bad designed PV devices (vmware |
6264 | * backdoor interface) need this to work | |
6265 | */ | |
dd856efa | 6266 | emulator_writeback_register_cache(&vcpu->arch.emulate_ctxt); |
7ae441ea GN |
6267 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
6268 | } | |
5fdbf976 MT |
6269 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
6270 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
6271 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
6272 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
6273 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
6274 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
6275 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
6276 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 6277 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
6278 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
6279 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
6280 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
6281 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
6282 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
6283 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
6284 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
6285 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
6286 | #endif |
6287 | ||
5fdbf976 | 6288 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 6289 | regs->rflags = kvm_get_rflags(vcpu); |
b6c7a5dc | 6290 | |
b6c7a5dc HB |
6291 | return 0; |
6292 | } | |
6293 | ||
6294 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
6295 | { | |
7ae441ea GN |
6296 | vcpu->arch.emulate_regs_need_sync_from_vcpu = true; |
6297 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; | |
6298 | ||
5fdbf976 MT |
6299 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
6300 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
6301 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
6302 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
6303 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
6304 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
6305 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
6306 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 6307 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
6308 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
6309 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
6310 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
6311 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
6312 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
6313 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
6314 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
6315 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
6316 | #endif |
6317 | ||
5fdbf976 | 6318 | kvm_rip_write(vcpu, regs->rip); |
91586a3b | 6319 | kvm_set_rflags(vcpu, regs->rflags); |
b6c7a5dc | 6320 | |
b4f14abd JK |
6321 | vcpu->arch.exception.pending = false; |
6322 | ||
3842d135 AK |
6323 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
6324 | ||
b6c7a5dc HB |
6325 | return 0; |
6326 | } | |
6327 | ||
b6c7a5dc HB |
6328 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
6329 | { | |
6330 | struct kvm_segment cs; | |
6331 | ||
3e6e0aab | 6332 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
6333 | *db = cs.db; |
6334 | *l = cs.l; | |
6335 | } | |
6336 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
6337 | ||
6338 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
6339 | struct kvm_sregs *sregs) | |
6340 | { | |
89a27f4d | 6341 | struct desc_ptr dt; |
b6c7a5dc | 6342 | |
3e6e0aab GT |
6343 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
6344 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
6345 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
6346 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
6347 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
6348 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 6349 | |
3e6e0aab GT |
6350 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
6351 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
6352 | |
6353 | kvm_x86_ops->get_idt(vcpu, &dt); | |
89a27f4d GN |
6354 | sregs->idt.limit = dt.size; |
6355 | sregs->idt.base = dt.address; | |
b6c7a5dc | 6356 | kvm_x86_ops->get_gdt(vcpu, &dt); |
89a27f4d GN |
6357 | sregs->gdt.limit = dt.size; |
6358 | sregs->gdt.base = dt.address; | |
b6c7a5dc | 6359 | |
4d4ec087 | 6360 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c | 6361 | sregs->cr2 = vcpu->arch.cr2; |
9f8fe504 | 6362 | sregs->cr3 = kvm_read_cr3(vcpu); |
fc78f519 | 6363 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 6364 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 6365 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
6366 | sregs->apic_base = kvm_get_apic_base(vcpu); |
6367 | ||
923c61bb | 6368 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 6369 | |
36752c9b | 6370 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
6371 | set_bit(vcpu->arch.interrupt.nr, |
6372 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 6373 | |
b6c7a5dc HB |
6374 | return 0; |
6375 | } | |
6376 | ||
62d9f0db MT |
6377 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
6378 | struct kvm_mp_state *mp_state) | |
6379 | { | |
66450a21 | 6380 | kvm_apic_accept_events(vcpu); |
6aef266c SV |
6381 | if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED && |
6382 | vcpu->arch.pv.pv_unhalted) | |
6383 | mp_state->mp_state = KVM_MP_STATE_RUNNABLE; | |
6384 | else | |
6385 | mp_state->mp_state = vcpu->arch.mp_state; | |
6386 | ||
62d9f0db MT |
6387 | return 0; |
6388 | } | |
6389 | ||
6390 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
6391 | struct kvm_mp_state *mp_state) | |
6392 | { | |
66450a21 JK |
6393 | if (!kvm_vcpu_has_lapic(vcpu) && |
6394 | mp_state->mp_state != KVM_MP_STATE_RUNNABLE) | |
6395 | return -EINVAL; | |
6396 | ||
6397 | if (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED) { | |
6398 | vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; | |
6399 | set_bit(KVM_APIC_SIPI, &vcpu->arch.apic->pending_events); | |
6400 | } else | |
6401 | vcpu->arch.mp_state = mp_state->mp_state; | |
3842d135 | 6402 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
62d9f0db MT |
6403 | return 0; |
6404 | } | |
6405 | ||
7f3d35fd KW |
6406 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, |
6407 | int reason, bool has_error_code, u32 error_code) | |
b6c7a5dc | 6408 | { |
9d74191a | 6409 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d | 6410 | int ret; |
e01c2426 | 6411 | |
8ec4722d | 6412 | init_emulate_ctxt(vcpu); |
c697518a | 6413 | |
7f3d35fd | 6414 | ret = emulator_task_switch(ctxt, tss_selector, idt_index, reason, |
9d74191a | 6415 | has_error_code, error_code); |
c697518a | 6416 | |
c697518a | 6417 | if (ret) |
19d04437 | 6418 | return EMULATE_FAIL; |
37817f29 | 6419 | |
9d74191a TY |
6420 | kvm_rip_write(vcpu, ctxt->eip); |
6421 | kvm_set_rflags(vcpu, ctxt->eflags); | |
3842d135 | 6422 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
19d04437 | 6423 | return EMULATE_DONE; |
37817f29 IE |
6424 | } |
6425 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
6426 | ||
b6c7a5dc HB |
6427 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
6428 | struct kvm_sregs *sregs) | |
6429 | { | |
58cb628d | 6430 | struct msr_data apic_base_msr; |
b6c7a5dc | 6431 | int mmu_reset_needed = 0; |
63f42e02 | 6432 | int pending_vec, max_bits, idx; |
89a27f4d | 6433 | struct desc_ptr dt; |
b6c7a5dc | 6434 | |
6d1068b3 PM |
6435 | if (!guest_cpuid_has_xsave(vcpu) && (sregs->cr4 & X86_CR4_OSXSAVE)) |
6436 | return -EINVAL; | |
6437 | ||
89a27f4d GN |
6438 | dt.size = sregs->idt.limit; |
6439 | dt.address = sregs->idt.base; | |
b6c7a5dc | 6440 | kvm_x86_ops->set_idt(vcpu, &dt); |
89a27f4d GN |
6441 | dt.size = sregs->gdt.limit; |
6442 | dt.address = sregs->gdt.base; | |
b6c7a5dc HB |
6443 | kvm_x86_ops->set_gdt(vcpu, &dt); |
6444 | ||
ad312c7c | 6445 | vcpu->arch.cr2 = sregs->cr2; |
9f8fe504 | 6446 | mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3; |
dc7e795e | 6447 | vcpu->arch.cr3 = sregs->cr3; |
aff48baa | 6448 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
b6c7a5dc | 6449 | |
2d3ad1f4 | 6450 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 6451 | |
f6801dff | 6452 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 6453 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
58cb628d JK |
6454 | apic_base_msr.data = sregs->apic_base; |
6455 | apic_base_msr.host_initiated = true; | |
6456 | kvm_set_apic_base(vcpu, &apic_base_msr); | |
b6c7a5dc | 6457 | |
4d4ec087 | 6458 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 6459 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 6460 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 6461 | |
fc78f519 | 6462 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 6463 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
3ea3aa8c | 6464 | if (sregs->cr4 & X86_CR4_OSXSAVE) |
00b27a3e | 6465 | kvm_update_cpuid(vcpu); |
63f42e02 XG |
6466 | |
6467 | idx = srcu_read_lock(&vcpu->kvm->srcu); | |
7c93be44 | 6468 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
9f8fe504 | 6469 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); |
7c93be44 MT |
6470 | mmu_reset_needed = 1; |
6471 | } | |
63f42e02 | 6472 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b6c7a5dc HB |
6473 | |
6474 | if (mmu_reset_needed) | |
6475 | kvm_mmu_reset_context(vcpu); | |
6476 | ||
a50abc3b | 6477 | max_bits = KVM_NR_INTERRUPTS; |
923c61bb GN |
6478 | pending_vec = find_first_bit( |
6479 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
6480 | if (pending_vec < max_bits) { | |
66fd3f7f | 6481 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb | 6482 | pr_debug("Set back pending irq %d\n", pending_vec); |
b6c7a5dc HB |
6483 | } |
6484 | ||
3e6e0aab GT |
6485 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
6486 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
6487 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
6488 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
6489 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
6490 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 6491 | |
3e6e0aab GT |
6492 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
6493 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 6494 | |
5f0269f5 ME |
6495 | update_cr8_intercept(vcpu); |
6496 | ||
9c3e4aab | 6497 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 6498 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 6499 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 6500 | !is_protmode(vcpu)) |
9c3e4aab MT |
6501 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
6502 | ||
3842d135 AK |
6503 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
6504 | ||
b6c7a5dc HB |
6505 | return 0; |
6506 | } | |
6507 | ||
d0bfb940 JK |
6508 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
6509 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 6510 | { |
355be0b9 | 6511 | unsigned long rflags; |
ae675ef0 | 6512 | int i, r; |
b6c7a5dc | 6513 | |
4f926bf2 JK |
6514 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
6515 | r = -EBUSY; | |
6516 | if (vcpu->arch.exception.pending) | |
2122ff5e | 6517 | goto out; |
4f926bf2 JK |
6518 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
6519 | kvm_queue_exception(vcpu, DB_VECTOR); | |
6520 | else | |
6521 | kvm_queue_exception(vcpu, BP_VECTOR); | |
6522 | } | |
6523 | ||
91586a3b JK |
6524 | /* |
6525 | * Read rflags as long as potentially injected trace flags are still | |
6526 | * filtered out. | |
6527 | */ | |
6528 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
6529 | |
6530 | vcpu->guest_debug = dbg->control; | |
6531 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
6532 | vcpu->guest_debug = 0; | |
6533 | ||
6534 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
6535 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
6536 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
c8639010 | 6537 | vcpu->arch.guest_debug_dr7 = dbg->arch.debugreg[7]; |
ae675ef0 JK |
6538 | } else { |
6539 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
6540 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
ae675ef0 | 6541 | } |
c8639010 | 6542 | kvm_update_dr7(vcpu); |
ae675ef0 | 6543 | |
f92653ee JK |
6544 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
6545 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + | |
6546 | get_segment_base(vcpu, VCPU_SREG_CS); | |
94fe45da | 6547 | |
91586a3b JK |
6548 | /* |
6549 | * Trigger an rflags update that will inject or remove the trace | |
6550 | * flags. | |
6551 | */ | |
6552 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 6553 | |
c8639010 | 6554 | kvm_x86_ops->update_db_bp_intercept(vcpu); |
b6c7a5dc | 6555 | |
4f926bf2 | 6556 | r = 0; |
d0bfb940 | 6557 | |
2122ff5e | 6558 | out: |
b6c7a5dc HB |
6559 | |
6560 | return r; | |
6561 | } | |
6562 | ||
8b006791 ZX |
6563 | /* |
6564 | * Translate a guest virtual address to a guest physical address. | |
6565 | */ | |
6566 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
6567 | struct kvm_translation *tr) | |
6568 | { | |
6569 | unsigned long vaddr = tr->linear_address; | |
6570 | gpa_t gpa; | |
f656ce01 | 6571 | int idx; |
8b006791 | 6572 | |
f656ce01 | 6573 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 6574 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 6575 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
6576 | tr->physical_address = gpa; |
6577 | tr->valid = gpa != UNMAPPED_GVA; | |
6578 | tr->writeable = 1; | |
6579 | tr->usermode = 0; | |
8b006791 ZX |
6580 | |
6581 | return 0; | |
6582 | } | |
6583 | ||
d0752060 HB |
6584 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
6585 | { | |
98918833 SY |
6586 | struct i387_fxsave_struct *fxsave = |
6587 | &vcpu->arch.guest_fpu.state->fxsave; | |
d0752060 | 6588 | |
d0752060 HB |
6589 | memcpy(fpu->fpr, fxsave->st_space, 128); |
6590 | fpu->fcw = fxsave->cwd; | |
6591 | fpu->fsw = fxsave->swd; | |
6592 | fpu->ftwx = fxsave->twd; | |
6593 | fpu->last_opcode = fxsave->fop; | |
6594 | fpu->last_ip = fxsave->rip; | |
6595 | fpu->last_dp = fxsave->rdp; | |
6596 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
6597 | ||
d0752060 HB |
6598 | return 0; |
6599 | } | |
6600 | ||
6601 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
6602 | { | |
98918833 SY |
6603 | struct i387_fxsave_struct *fxsave = |
6604 | &vcpu->arch.guest_fpu.state->fxsave; | |
d0752060 | 6605 | |
d0752060 HB |
6606 | memcpy(fxsave->st_space, fpu->fpr, 128); |
6607 | fxsave->cwd = fpu->fcw; | |
6608 | fxsave->swd = fpu->fsw; | |
6609 | fxsave->twd = fpu->ftwx; | |
6610 | fxsave->fop = fpu->last_opcode; | |
6611 | fxsave->rip = fpu->last_ip; | |
6612 | fxsave->rdp = fpu->last_dp; | |
6613 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
6614 | ||
d0752060 HB |
6615 | return 0; |
6616 | } | |
6617 | ||
10ab25cd | 6618 | int fx_init(struct kvm_vcpu *vcpu) |
d0752060 | 6619 | { |
10ab25cd JK |
6620 | int err; |
6621 | ||
6622 | err = fpu_alloc(&vcpu->arch.guest_fpu); | |
6623 | if (err) | |
6624 | return err; | |
6625 | ||
98918833 | 6626 | fpu_finit(&vcpu->arch.guest_fpu); |
d0752060 | 6627 | |
2acf923e DC |
6628 | /* |
6629 | * Ensure guest xcr0 is valid for loading | |
6630 | */ | |
6631 | vcpu->arch.xcr0 = XSTATE_FP; | |
6632 | ||
ad312c7c | 6633 | vcpu->arch.cr0 |= X86_CR0_ET; |
10ab25cd JK |
6634 | |
6635 | return 0; | |
d0752060 HB |
6636 | } |
6637 | EXPORT_SYMBOL_GPL(fx_init); | |
6638 | ||
98918833 SY |
6639 | static void fx_free(struct kvm_vcpu *vcpu) |
6640 | { | |
6641 | fpu_free(&vcpu->arch.guest_fpu); | |
6642 | } | |
6643 | ||
d0752060 HB |
6644 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
6645 | { | |
2608d7a1 | 6646 | if (vcpu->guest_fpu_loaded) |
d0752060 HB |
6647 | return; |
6648 | ||
2acf923e DC |
6649 | /* |
6650 | * Restore all possible states in the guest, | |
6651 | * and assume host would use all available bits. | |
6652 | * Guest xcr0 would be loaded later. | |
6653 | */ | |
6654 | kvm_put_guest_xcr0(vcpu); | |
d0752060 | 6655 | vcpu->guest_fpu_loaded = 1; |
b1a74bf8 | 6656 | __kernel_fpu_begin(); |
98918833 | 6657 | fpu_restore_checking(&vcpu->arch.guest_fpu); |
0c04851c | 6658 | trace_kvm_fpu(1); |
d0752060 | 6659 | } |
d0752060 HB |
6660 | |
6661 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
6662 | { | |
2acf923e DC |
6663 | kvm_put_guest_xcr0(vcpu); |
6664 | ||
d0752060 HB |
6665 | if (!vcpu->guest_fpu_loaded) |
6666 | return; | |
6667 | ||
6668 | vcpu->guest_fpu_loaded = 0; | |
98918833 | 6669 | fpu_save_init(&vcpu->arch.guest_fpu); |
b1a74bf8 | 6670 | __kernel_fpu_end(); |
f096ed85 | 6671 | ++vcpu->stat.fpu_reload; |
a8eeb04a | 6672 | kvm_make_request(KVM_REQ_DEACTIVATE_FPU, vcpu); |
0c04851c | 6673 | trace_kvm_fpu(0); |
d0752060 | 6674 | } |
e9b11c17 ZX |
6675 | |
6676 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
6677 | { | |
12f9a48f | 6678 | kvmclock_reset(vcpu); |
7f1ea208 | 6679 | |
f5f48ee1 | 6680 | free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); |
98918833 | 6681 | fx_free(vcpu); |
e9b11c17 ZX |
6682 | kvm_x86_ops->vcpu_free(vcpu); |
6683 | } | |
6684 | ||
6685 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
6686 | unsigned int id) | |
6687 | { | |
6755bae8 ZA |
6688 | if (check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0) |
6689 | printk_once(KERN_WARNING | |
6690 | "kvm: SMP vm created on host with unstable TSC; " | |
6691 | "guest TSC will not be reliable\n"); | |
26e5215f AK |
6692 | return kvm_x86_ops->vcpu_create(kvm, id); |
6693 | } | |
e9b11c17 | 6694 | |
26e5215f AK |
6695 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
6696 | { | |
6697 | int r; | |
e9b11c17 | 6698 | |
0bed3b56 | 6699 | vcpu->arch.mtrr_state.have_fixed = 1; |
9fc77441 MT |
6700 | r = vcpu_load(vcpu); |
6701 | if (r) | |
6702 | return r; | |
57f252f2 | 6703 | kvm_vcpu_reset(vcpu); |
8a3c1a33 | 6704 | kvm_mmu_setup(vcpu); |
e9b11c17 | 6705 | vcpu_put(vcpu); |
e9b11c17 | 6706 | |
26e5215f | 6707 | return r; |
e9b11c17 ZX |
6708 | } |
6709 | ||
42897d86 MT |
6710 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
6711 | { | |
6712 | int r; | |
8fe8ab46 | 6713 | struct msr_data msr; |
42897d86 MT |
6714 | |
6715 | r = vcpu_load(vcpu); | |
6716 | if (r) | |
6717 | return r; | |
8fe8ab46 WA |
6718 | msr.data = 0x0; |
6719 | msr.index = MSR_IA32_TSC; | |
6720 | msr.host_initiated = true; | |
6721 | kvm_write_tsc(vcpu, &msr); | |
42897d86 MT |
6722 | vcpu_put(vcpu); |
6723 | ||
6724 | return r; | |
6725 | } | |
6726 | ||
d40ccc62 | 6727 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 | 6728 | { |
9fc77441 | 6729 | int r; |
344d9588 GN |
6730 | vcpu->arch.apf.msr_val = 0; |
6731 | ||
9fc77441 MT |
6732 | r = vcpu_load(vcpu); |
6733 | BUG_ON(r); | |
e9b11c17 ZX |
6734 | kvm_mmu_unload(vcpu); |
6735 | vcpu_put(vcpu); | |
6736 | ||
98918833 | 6737 | fx_free(vcpu); |
e9b11c17 ZX |
6738 | kvm_x86_ops->vcpu_free(vcpu); |
6739 | } | |
6740 | ||
66450a21 | 6741 | void kvm_vcpu_reset(struct kvm_vcpu *vcpu) |
e9b11c17 | 6742 | { |
7460fb4a AK |
6743 | atomic_set(&vcpu->arch.nmi_queued, 0); |
6744 | vcpu->arch.nmi_pending = 0; | |
448fa4a9 JK |
6745 | vcpu->arch.nmi_injected = false; |
6746 | ||
42dbaa5a JK |
6747 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); |
6748 | vcpu->arch.dr6 = DR6_FIXED_1; | |
73aaf249 | 6749 | kvm_update_dr6(vcpu); |
42dbaa5a | 6750 | vcpu->arch.dr7 = DR7_FIXED_1; |
c8639010 | 6751 | kvm_update_dr7(vcpu); |
42dbaa5a | 6752 | |
3842d135 | 6753 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
344d9588 | 6754 | vcpu->arch.apf.msr_val = 0; |
c9aaa895 | 6755 | vcpu->arch.st.msr_val = 0; |
3842d135 | 6756 | |
12f9a48f GC |
6757 | kvmclock_reset(vcpu); |
6758 | ||
af585b92 GN |
6759 | kvm_clear_async_pf_completion_queue(vcpu); |
6760 | kvm_async_pf_hash_reset(vcpu); | |
6761 | vcpu->arch.apf.halted = false; | |
3842d135 | 6762 | |
f5132b01 GN |
6763 | kvm_pmu_reset(vcpu); |
6764 | ||
66f7b72e JS |
6765 | memset(vcpu->arch.regs, 0, sizeof(vcpu->arch.regs)); |
6766 | vcpu->arch.regs_avail = ~0; | |
6767 | vcpu->arch.regs_dirty = ~0; | |
6768 | ||
57f252f2 | 6769 | kvm_x86_ops->vcpu_reset(vcpu); |
e9b11c17 ZX |
6770 | } |
6771 | ||
66450a21 JK |
6772 | void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, unsigned int vector) |
6773 | { | |
6774 | struct kvm_segment cs; | |
6775 | ||
6776 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
6777 | cs.selector = vector << 8; | |
6778 | cs.base = vector << 12; | |
6779 | kvm_set_segment(vcpu, &cs, VCPU_SREG_CS); | |
6780 | kvm_rip_write(vcpu, 0); | |
e9b11c17 ZX |
6781 | } |
6782 | ||
10474ae8 | 6783 | int kvm_arch_hardware_enable(void *garbage) |
e9b11c17 | 6784 | { |
ca84d1a2 ZA |
6785 | struct kvm *kvm; |
6786 | struct kvm_vcpu *vcpu; | |
6787 | int i; | |
0dd6a6ed ZA |
6788 | int ret; |
6789 | u64 local_tsc; | |
6790 | u64 max_tsc = 0; | |
6791 | bool stable, backwards_tsc = false; | |
18863bdd AK |
6792 | |
6793 | kvm_shared_msr_cpu_online(); | |
0dd6a6ed ZA |
6794 | ret = kvm_x86_ops->hardware_enable(garbage); |
6795 | if (ret != 0) | |
6796 | return ret; | |
6797 | ||
6798 | local_tsc = native_read_tsc(); | |
6799 | stable = !check_tsc_unstable(); | |
6800 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
6801 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
6802 | if (!stable && vcpu->cpu == smp_processor_id()) | |
6803 | set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); | |
6804 | if (stable && vcpu->arch.last_host_tsc > local_tsc) { | |
6805 | backwards_tsc = true; | |
6806 | if (vcpu->arch.last_host_tsc > max_tsc) | |
6807 | max_tsc = vcpu->arch.last_host_tsc; | |
6808 | } | |
6809 | } | |
6810 | } | |
6811 | ||
6812 | /* | |
6813 | * Sometimes, even reliable TSCs go backwards. This happens on | |
6814 | * platforms that reset TSC during suspend or hibernate actions, but | |
6815 | * maintain synchronization. We must compensate. Fortunately, we can | |
6816 | * detect that condition here, which happens early in CPU bringup, | |
6817 | * before any KVM threads can be running. Unfortunately, we can't | |
6818 | * bring the TSCs fully up to date with real time, as we aren't yet far | |
6819 | * enough into CPU bringup that we know how much real time has actually | |
6820 | * elapsed; our helper function, get_kernel_ns() will be using boot | |
6821 | * variables that haven't been updated yet. | |
6822 | * | |
6823 | * So we simply find the maximum observed TSC above, then record the | |
6824 | * adjustment to TSC in each VCPU. When the VCPU later gets loaded, | |
6825 | * the adjustment will be applied. Note that we accumulate | |
6826 | * adjustments, in case multiple suspend cycles happen before some VCPU | |
6827 | * gets a chance to run again. In the event that no KVM threads get a | |
6828 | * chance to run, we will miss the entire elapsed period, as we'll have | |
6829 | * reset last_host_tsc, so VCPUs will not have the TSC adjusted and may | |
6830 | * loose cycle time. This isn't too big a deal, since the loss will be | |
6831 | * uniform across all VCPUs (not to mention the scenario is extremely | |
6832 | * unlikely). It is possible that a second hibernate recovery happens | |
6833 | * much faster than a first, causing the observed TSC here to be | |
6834 | * smaller; this would require additional padding adjustment, which is | |
6835 | * why we set last_host_tsc to the local tsc observed here. | |
6836 | * | |
6837 | * N.B. - this code below runs only on platforms with reliable TSC, | |
6838 | * as that is the only way backwards_tsc is set above. Also note | |
6839 | * that this runs for ALL vcpus, which is not a bug; all VCPUs should | |
6840 | * have the same delta_cyc adjustment applied if backwards_tsc | |
6841 | * is detected. Note further, this adjustment is only done once, | |
6842 | * as we reset last_host_tsc on all VCPUs to stop this from being | |
6843 | * called multiple times (one for each physical CPU bringup). | |
6844 | * | |
4a969980 | 6845 | * Platforms with unreliable TSCs don't have to deal with this, they |
0dd6a6ed ZA |
6846 | * will be compensated by the logic in vcpu_load, which sets the TSC to |
6847 | * catchup mode. This will catchup all VCPUs to real time, but cannot | |
6848 | * guarantee that they stay in perfect synchronization. | |
6849 | */ | |
6850 | if (backwards_tsc) { | |
6851 | u64 delta_cyc = max_tsc - local_tsc; | |
6852 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
6853 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
6854 | vcpu->arch.tsc_offset_adjustment += delta_cyc; | |
6855 | vcpu->arch.last_host_tsc = local_tsc; | |
d828199e MT |
6856 | set_bit(KVM_REQ_MASTERCLOCK_UPDATE, |
6857 | &vcpu->requests); | |
0dd6a6ed ZA |
6858 | } |
6859 | ||
6860 | /* | |
6861 | * We have to disable TSC offset matching.. if you were | |
6862 | * booting a VM while issuing an S4 host suspend.... | |
6863 | * you may have some problem. Solving this issue is | |
6864 | * left as an exercise to the reader. | |
6865 | */ | |
6866 | kvm->arch.last_tsc_nsec = 0; | |
6867 | kvm->arch.last_tsc_write = 0; | |
6868 | } | |
6869 | ||
6870 | } | |
6871 | return 0; | |
e9b11c17 ZX |
6872 | } |
6873 | ||
6874 | void kvm_arch_hardware_disable(void *garbage) | |
6875 | { | |
6876 | kvm_x86_ops->hardware_disable(garbage); | |
3548bab5 | 6877 | drop_user_return_notifiers(garbage); |
e9b11c17 ZX |
6878 | } |
6879 | ||
6880 | int kvm_arch_hardware_setup(void) | |
6881 | { | |
6882 | return kvm_x86_ops->hardware_setup(); | |
6883 | } | |
6884 | ||
6885 | void kvm_arch_hardware_unsetup(void) | |
6886 | { | |
6887 | kvm_x86_ops->hardware_unsetup(); | |
6888 | } | |
6889 | ||
6890 | void kvm_arch_check_processor_compat(void *rtn) | |
6891 | { | |
6892 | kvm_x86_ops->check_processor_compatibility(rtn); | |
6893 | } | |
6894 | ||
3e515705 AK |
6895 | bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) |
6896 | { | |
6897 | return irqchip_in_kernel(vcpu->kvm) == (vcpu->arch.apic != NULL); | |
6898 | } | |
6899 | ||
54e9818f GN |
6900 | struct static_key kvm_no_apic_vcpu __read_mostly; |
6901 | ||
e9b11c17 ZX |
6902 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
6903 | { | |
6904 | struct page *page; | |
6905 | struct kvm *kvm; | |
6906 | int r; | |
6907 | ||
6908 | BUG_ON(vcpu->kvm == NULL); | |
6909 | kvm = vcpu->kvm; | |
6910 | ||
6aef266c | 6911 | vcpu->arch.pv.pv_unhalted = false; |
9aabc88f | 6912 | vcpu->arch.emulate_ctxt.ops = &emulate_ops; |
c5af89b6 | 6913 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) |
a4535290 | 6914 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 6915 | else |
a4535290 | 6916 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
6917 | |
6918 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
6919 | if (!page) { | |
6920 | r = -ENOMEM; | |
6921 | goto fail; | |
6922 | } | |
ad312c7c | 6923 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 | 6924 | |
cc578287 | 6925 | kvm_set_tsc_khz(vcpu, max_tsc_khz); |
c285545f | 6926 | |
e9b11c17 ZX |
6927 | r = kvm_mmu_create(vcpu); |
6928 | if (r < 0) | |
6929 | goto fail_free_pio_data; | |
6930 | ||
6931 | if (irqchip_in_kernel(kvm)) { | |
6932 | r = kvm_create_lapic(vcpu); | |
6933 | if (r < 0) | |
6934 | goto fail_mmu_destroy; | |
54e9818f GN |
6935 | } else |
6936 | static_key_slow_inc(&kvm_no_apic_vcpu); | |
e9b11c17 | 6937 | |
890ca9ae HY |
6938 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
6939 | GFP_KERNEL); | |
6940 | if (!vcpu->arch.mce_banks) { | |
6941 | r = -ENOMEM; | |
443c39bc | 6942 | goto fail_free_lapic; |
890ca9ae HY |
6943 | } |
6944 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
6945 | ||
f1797359 WY |
6946 | if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL)) { |
6947 | r = -ENOMEM; | |
f5f48ee1 | 6948 | goto fail_free_mce_banks; |
f1797359 | 6949 | } |
f5f48ee1 | 6950 | |
66f7b72e JS |
6951 | r = fx_init(vcpu); |
6952 | if (r) | |
6953 | goto fail_free_wbinvd_dirty_mask; | |
6954 | ||
ba904635 | 6955 | vcpu->arch.ia32_tsc_adjust_msr = 0x0; |
0b79459b | 6956 | vcpu->arch.pv_time_enabled = false; |
d7876f1b PB |
6957 | |
6958 | vcpu->arch.guest_supported_xcr0 = 0; | |
4344ee98 | 6959 | vcpu->arch.guest_xstate_size = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET; |
d7876f1b | 6960 | |
af585b92 | 6961 | kvm_async_pf_hash_reset(vcpu); |
f5132b01 | 6962 | kvm_pmu_init(vcpu); |
af585b92 | 6963 | |
e9b11c17 | 6964 | return 0; |
66f7b72e JS |
6965 | fail_free_wbinvd_dirty_mask: |
6966 | free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); | |
f5f48ee1 SY |
6967 | fail_free_mce_banks: |
6968 | kfree(vcpu->arch.mce_banks); | |
443c39bc WY |
6969 | fail_free_lapic: |
6970 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
6971 | fail_mmu_destroy: |
6972 | kvm_mmu_destroy(vcpu); | |
6973 | fail_free_pio_data: | |
ad312c7c | 6974 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
6975 | fail: |
6976 | return r; | |
6977 | } | |
6978 | ||
6979 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
6980 | { | |
f656ce01 MT |
6981 | int idx; |
6982 | ||
f5132b01 | 6983 | kvm_pmu_destroy(vcpu); |
36cb93fd | 6984 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 6985 | kvm_free_lapic(vcpu); |
f656ce01 | 6986 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 6987 | kvm_mmu_destroy(vcpu); |
f656ce01 | 6988 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 6989 | free_page((unsigned long)vcpu->arch.pio_data); |
54e9818f GN |
6990 | if (!irqchip_in_kernel(vcpu->kvm)) |
6991 | static_key_slow_dec(&kvm_no_apic_vcpu); | |
e9b11c17 | 6992 | } |
d19a9cd2 | 6993 | |
e08b9637 | 6994 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
d19a9cd2 | 6995 | { |
e08b9637 CO |
6996 | if (type) |
6997 | return -EINVAL; | |
6998 | ||
f05e70ac | 6999 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
365c8868 | 7000 | INIT_LIST_HEAD(&kvm->arch.zapped_obsolete_pages); |
4d5c5d0f | 7001 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
e0f0bbc5 | 7002 | atomic_set(&kvm->arch.noncoherent_dma_count, 0); |
d19a9cd2 | 7003 | |
5550af4d SY |
7004 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
7005 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
7a84428a AW |
7006 | /* Reserve bit 1 of irq_sources_bitmap for irqfd-resampler */ |
7007 | set_bit(KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID, | |
7008 | &kvm->arch.irq_sources_bitmap); | |
5550af4d | 7009 | |
038f8c11 | 7010 | raw_spin_lock_init(&kvm->arch.tsc_write_lock); |
1e08ec4a | 7011 | mutex_init(&kvm->arch.apic_map_lock); |
d828199e MT |
7012 | spin_lock_init(&kvm->arch.pvclock_gtod_sync_lock); |
7013 | ||
7014 | pvclock_update_vm_gtod_copy(kvm); | |
53f658b3 | 7015 | |
d89f5eff | 7016 | return 0; |
d19a9cd2 ZX |
7017 | } |
7018 | ||
7019 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
7020 | { | |
9fc77441 MT |
7021 | int r; |
7022 | r = vcpu_load(vcpu); | |
7023 | BUG_ON(r); | |
d19a9cd2 ZX |
7024 | kvm_mmu_unload(vcpu); |
7025 | vcpu_put(vcpu); | |
7026 | } | |
7027 | ||
7028 | static void kvm_free_vcpus(struct kvm *kvm) | |
7029 | { | |
7030 | unsigned int i; | |
988a2cae | 7031 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
7032 | |
7033 | /* | |
7034 | * Unpin any mmu pages first. | |
7035 | */ | |
af585b92 GN |
7036 | kvm_for_each_vcpu(i, vcpu, kvm) { |
7037 | kvm_clear_async_pf_completion_queue(vcpu); | |
988a2cae | 7038 | kvm_unload_vcpu_mmu(vcpu); |
af585b92 | 7039 | } |
988a2cae GN |
7040 | kvm_for_each_vcpu(i, vcpu, kvm) |
7041 | kvm_arch_vcpu_free(vcpu); | |
7042 | ||
7043 | mutex_lock(&kvm->lock); | |
7044 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
7045 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 7046 | |
988a2cae GN |
7047 | atomic_set(&kvm->online_vcpus, 0); |
7048 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
7049 | } |
7050 | ||
ad8ba2cd SY |
7051 | void kvm_arch_sync_events(struct kvm *kvm) |
7052 | { | |
ba4cef31 | 7053 | kvm_free_all_assigned_devices(kvm); |
aea924f6 | 7054 | kvm_free_pit(kvm); |
ad8ba2cd SY |
7055 | } |
7056 | ||
d19a9cd2 ZX |
7057 | void kvm_arch_destroy_vm(struct kvm *kvm) |
7058 | { | |
27469d29 AH |
7059 | if (current->mm == kvm->mm) { |
7060 | /* | |
7061 | * Free memory regions allocated on behalf of userspace, | |
7062 | * unless the the memory map has changed due to process exit | |
7063 | * or fd copying. | |
7064 | */ | |
7065 | struct kvm_userspace_memory_region mem; | |
7066 | memset(&mem, 0, sizeof(mem)); | |
7067 | mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT; | |
7068 | kvm_set_memory_region(kvm, &mem); | |
7069 | ||
7070 | mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT; | |
7071 | kvm_set_memory_region(kvm, &mem); | |
7072 | ||
7073 | mem.slot = TSS_PRIVATE_MEMSLOT; | |
7074 | kvm_set_memory_region(kvm, &mem); | |
7075 | } | |
6eb55818 | 7076 | kvm_iommu_unmap_guest(kvm); |
d7deeeb0 ZX |
7077 | kfree(kvm->arch.vpic); |
7078 | kfree(kvm->arch.vioapic); | |
d19a9cd2 | 7079 | kvm_free_vcpus(kvm); |
3d45830c AK |
7080 | if (kvm->arch.apic_access_page) |
7081 | put_page(kvm->arch.apic_access_page); | |
b7ebfb05 SY |
7082 | if (kvm->arch.ept_identity_pagetable) |
7083 | put_page(kvm->arch.ept_identity_pagetable); | |
1e08ec4a | 7084 | kfree(rcu_dereference_check(kvm->arch.apic_map, 1)); |
d19a9cd2 | 7085 | } |
0de10343 | 7086 | |
5587027c | 7087 | void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, |
db3fe4eb TY |
7088 | struct kvm_memory_slot *dont) |
7089 | { | |
7090 | int i; | |
7091 | ||
d89cc617 TY |
7092 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
7093 | if (!dont || free->arch.rmap[i] != dont->arch.rmap[i]) { | |
7094 | kvm_kvfree(free->arch.rmap[i]); | |
7095 | free->arch.rmap[i] = NULL; | |
77d11309 | 7096 | } |
d89cc617 TY |
7097 | if (i == 0) |
7098 | continue; | |
7099 | ||
7100 | if (!dont || free->arch.lpage_info[i - 1] != | |
7101 | dont->arch.lpage_info[i - 1]) { | |
7102 | kvm_kvfree(free->arch.lpage_info[i - 1]); | |
7103 | free->arch.lpage_info[i - 1] = NULL; | |
db3fe4eb TY |
7104 | } |
7105 | } | |
7106 | } | |
7107 | ||
5587027c AK |
7108 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
7109 | unsigned long npages) | |
db3fe4eb TY |
7110 | { |
7111 | int i; | |
7112 | ||
d89cc617 | 7113 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
db3fe4eb TY |
7114 | unsigned long ugfn; |
7115 | int lpages; | |
d89cc617 | 7116 | int level = i + 1; |
db3fe4eb TY |
7117 | |
7118 | lpages = gfn_to_index(slot->base_gfn + npages - 1, | |
7119 | slot->base_gfn, level) + 1; | |
7120 | ||
d89cc617 TY |
7121 | slot->arch.rmap[i] = |
7122 | kvm_kvzalloc(lpages * sizeof(*slot->arch.rmap[i])); | |
7123 | if (!slot->arch.rmap[i]) | |
77d11309 | 7124 | goto out_free; |
d89cc617 TY |
7125 | if (i == 0) |
7126 | continue; | |
77d11309 | 7127 | |
d89cc617 TY |
7128 | slot->arch.lpage_info[i - 1] = kvm_kvzalloc(lpages * |
7129 | sizeof(*slot->arch.lpage_info[i - 1])); | |
7130 | if (!slot->arch.lpage_info[i - 1]) | |
db3fe4eb TY |
7131 | goto out_free; |
7132 | ||
7133 | if (slot->base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1)) | |
d89cc617 | 7134 | slot->arch.lpage_info[i - 1][0].write_count = 1; |
db3fe4eb | 7135 | if ((slot->base_gfn + npages) & (KVM_PAGES_PER_HPAGE(level) - 1)) |
d89cc617 | 7136 | slot->arch.lpage_info[i - 1][lpages - 1].write_count = 1; |
db3fe4eb TY |
7137 | ugfn = slot->userspace_addr >> PAGE_SHIFT; |
7138 | /* | |
7139 | * If the gfn and userspace address are not aligned wrt each | |
7140 | * other, or if explicitly asked to, disable large page | |
7141 | * support for this slot | |
7142 | */ | |
7143 | if ((slot->base_gfn ^ ugfn) & (KVM_PAGES_PER_HPAGE(level) - 1) || | |
7144 | !kvm_largepages_enabled()) { | |
7145 | unsigned long j; | |
7146 | ||
7147 | for (j = 0; j < lpages; ++j) | |
d89cc617 | 7148 | slot->arch.lpage_info[i - 1][j].write_count = 1; |
db3fe4eb TY |
7149 | } |
7150 | } | |
7151 | ||
7152 | return 0; | |
7153 | ||
7154 | out_free: | |
d89cc617 TY |
7155 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
7156 | kvm_kvfree(slot->arch.rmap[i]); | |
7157 | slot->arch.rmap[i] = NULL; | |
7158 | if (i == 0) | |
7159 | continue; | |
7160 | ||
7161 | kvm_kvfree(slot->arch.lpage_info[i - 1]); | |
7162 | slot->arch.lpage_info[i - 1] = NULL; | |
db3fe4eb TY |
7163 | } |
7164 | return -ENOMEM; | |
7165 | } | |
7166 | ||
e59dbe09 TY |
7167 | void kvm_arch_memslots_updated(struct kvm *kvm) |
7168 | { | |
e6dff7d1 TY |
7169 | /* |
7170 | * memslots->generation has been incremented. | |
7171 | * mmio generation may have reached its maximum value. | |
7172 | */ | |
7173 | kvm_mmu_invalidate_mmio_sptes(kvm); | |
e59dbe09 TY |
7174 | } |
7175 | ||
f7784b8e MT |
7176 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
7177 | struct kvm_memory_slot *memslot, | |
f7784b8e | 7178 | struct kvm_userspace_memory_region *mem, |
7b6195a9 | 7179 | enum kvm_mr_change change) |
0de10343 | 7180 | { |
7a905b14 TY |
7181 | /* |
7182 | * Only private memory slots need to be mapped here since | |
7183 | * KVM_SET_MEMORY_REGION ioctl is no longer supported. | |
0de10343 | 7184 | */ |
7b6195a9 | 7185 | if ((memslot->id >= KVM_USER_MEM_SLOTS) && (change == KVM_MR_CREATE)) { |
7a905b14 | 7186 | unsigned long userspace_addr; |
604b38ac | 7187 | |
7a905b14 TY |
7188 | /* |
7189 | * MAP_SHARED to prevent internal slot pages from being moved | |
7190 | * by fork()/COW. | |
7191 | */ | |
7b6195a9 | 7192 | userspace_addr = vm_mmap(NULL, 0, memslot->npages * PAGE_SIZE, |
7a905b14 TY |
7193 | PROT_READ | PROT_WRITE, |
7194 | MAP_SHARED | MAP_ANONYMOUS, 0); | |
0de10343 | 7195 | |
7a905b14 TY |
7196 | if (IS_ERR((void *)userspace_addr)) |
7197 | return PTR_ERR((void *)userspace_addr); | |
604b38ac | 7198 | |
7a905b14 | 7199 | memslot->userspace_addr = userspace_addr; |
0de10343 ZX |
7200 | } |
7201 | ||
f7784b8e MT |
7202 | return 0; |
7203 | } | |
7204 | ||
7205 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
7206 | struct kvm_userspace_memory_region *mem, | |
8482644a TY |
7207 | const struct kvm_memory_slot *old, |
7208 | enum kvm_mr_change change) | |
f7784b8e MT |
7209 | { |
7210 | ||
8482644a | 7211 | int nr_mmu_pages = 0; |
f7784b8e | 7212 | |
8482644a | 7213 | if ((mem->slot >= KVM_USER_MEM_SLOTS) && (change == KVM_MR_DELETE)) { |
f7784b8e MT |
7214 | int ret; |
7215 | ||
8482644a TY |
7216 | ret = vm_munmap(old->userspace_addr, |
7217 | old->npages * PAGE_SIZE); | |
f7784b8e MT |
7218 | if (ret < 0) |
7219 | printk(KERN_WARNING | |
7220 | "kvm_vm_ioctl_set_memory_region: " | |
7221 | "failed to munmap memory\n"); | |
7222 | } | |
7223 | ||
48c0e4e9 XG |
7224 | if (!kvm->arch.n_requested_mmu_pages) |
7225 | nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); | |
7226 | ||
48c0e4e9 | 7227 | if (nr_mmu_pages) |
0de10343 | 7228 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); |
c972f3b1 TY |
7229 | /* |
7230 | * Write protect all pages for dirty logging. | |
7231 | * Existing largepage mappings are destroyed here and new ones will | |
7232 | * not be created until the end of the logging. | |
7233 | */ | |
8482644a | 7234 | if ((change != KVM_MR_DELETE) && (mem->flags & KVM_MEM_LOG_DIRTY_PAGES)) |
c972f3b1 | 7235 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); |
0de10343 | 7236 | } |
1d737c8a | 7237 | |
2df72e9b | 7238 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
34d4cb8f | 7239 | { |
6ca18b69 | 7240 | kvm_mmu_invalidate_zap_all_pages(kvm); |
34d4cb8f MT |
7241 | } |
7242 | ||
2df72e9b MT |
7243 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
7244 | struct kvm_memory_slot *slot) | |
7245 | { | |
6ca18b69 | 7246 | kvm_mmu_invalidate_zap_all_pages(kvm); |
2df72e9b MT |
7247 | } |
7248 | ||
1d737c8a ZX |
7249 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
7250 | { | |
af585b92 GN |
7251 | return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
7252 | !vcpu->arch.apf.halted) | |
7253 | || !list_empty_careful(&vcpu->async_pf.done) | |
66450a21 | 7254 | || kvm_apic_has_events(vcpu) |
6aef266c | 7255 | || vcpu->arch.pv.pv_unhalted |
7460fb4a | 7256 | || atomic_read(&vcpu->arch.nmi_queued) || |
a1b37100 GN |
7257 | (kvm_arch_interrupt_allowed(vcpu) && |
7258 | kvm_cpu_has_interrupt(vcpu)); | |
1d737c8a | 7259 | } |
5736199a | 7260 | |
b6d33834 | 7261 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
5736199a | 7262 | { |
b6d33834 | 7263 | return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; |
5736199a | 7264 | } |
78646121 GN |
7265 | |
7266 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
7267 | { | |
7268 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
7269 | } | |
229456fc | 7270 | |
f92653ee JK |
7271 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
7272 | { | |
7273 | unsigned long current_rip = kvm_rip_read(vcpu) + | |
7274 | get_segment_base(vcpu, VCPU_SREG_CS); | |
7275 | ||
7276 | return current_rip == linear_rip; | |
7277 | } | |
7278 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); | |
7279 | ||
94fe45da JK |
7280 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
7281 | { | |
7282 | unsigned long rflags; | |
7283 | ||
7284 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
7285 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
c310bac5 | 7286 | rflags &= ~X86_EFLAGS_TF; |
94fe45da JK |
7287 | return rflags; |
7288 | } | |
7289 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
7290 | ||
7291 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
7292 | { | |
7293 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
f92653ee | 7294 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
c310bac5 | 7295 | rflags |= X86_EFLAGS_TF; |
94fe45da | 7296 | kvm_x86_ops->set_rflags(vcpu, rflags); |
3842d135 | 7297 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
94fe45da JK |
7298 | } |
7299 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
7300 | ||
56028d08 GN |
7301 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work) |
7302 | { | |
7303 | int r; | |
7304 | ||
fb67e14f | 7305 | if ((vcpu->arch.mmu.direct_map != work->arch.direct_map) || |
f2e10669 | 7306 | work->wakeup_all) |
56028d08 GN |
7307 | return; |
7308 | ||
7309 | r = kvm_mmu_reload(vcpu); | |
7310 | if (unlikely(r)) | |
7311 | return; | |
7312 | ||
fb67e14f XG |
7313 | if (!vcpu->arch.mmu.direct_map && |
7314 | work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu)) | |
7315 | return; | |
7316 | ||
56028d08 GN |
7317 | vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true); |
7318 | } | |
7319 | ||
af585b92 GN |
7320 | static inline u32 kvm_async_pf_hash_fn(gfn_t gfn) |
7321 | { | |
7322 | return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU)); | |
7323 | } | |
7324 | ||
7325 | static inline u32 kvm_async_pf_next_probe(u32 key) | |
7326 | { | |
7327 | return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1); | |
7328 | } | |
7329 | ||
7330 | static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
7331 | { | |
7332 | u32 key = kvm_async_pf_hash_fn(gfn); | |
7333 | ||
7334 | while (vcpu->arch.apf.gfns[key] != ~0) | |
7335 | key = kvm_async_pf_next_probe(key); | |
7336 | ||
7337 | vcpu->arch.apf.gfns[key] = gfn; | |
7338 | } | |
7339 | ||
7340 | static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn) | |
7341 | { | |
7342 | int i; | |
7343 | u32 key = kvm_async_pf_hash_fn(gfn); | |
7344 | ||
7345 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) && | |
c7d28c24 XG |
7346 | (vcpu->arch.apf.gfns[key] != gfn && |
7347 | vcpu->arch.apf.gfns[key] != ~0); i++) | |
af585b92 GN |
7348 | key = kvm_async_pf_next_probe(key); |
7349 | ||
7350 | return key; | |
7351 | } | |
7352 | ||
7353 | bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
7354 | { | |
7355 | return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn; | |
7356 | } | |
7357 | ||
7358 | static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
7359 | { | |
7360 | u32 i, j, k; | |
7361 | ||
7362 | i = j = kvm_async_pf_gfn_slot(vcpu, gfn); | |
7363 | while (true) { | |
7364 | vcpu->arch.apf.gfns[i] = ~0; | |
7365 | do { | |
7366 | j = kvm_async_pf_next_probe(j); | |
7367 | if (vcpu->arch.apf.gfns[j] == ~0) | |
7368 | return; | |
7369 | k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]); | |
7370 | /* | |
7371 | * k lies cyclically in ]i,j] | |
7372 | * | i.k.j | | |
7373 | * |....j i.k.| or |.k..j i...| | |
7374 | */ | |
7375 | } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j)); | |
7376 | vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j]; | |
7377 | i = j; | |
7378 | } | |
7379 | } | |
7380 | ||
7c90705b GN |
7381 | static int apf_put_user(struct kvm_vcpu *vcpu, u32 val) |
7382 | { | |
7383 | ||
7384 | return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val, | |
7385 | sizeof(val)); | |
7386 | } | |
7387 | ||
af585b92 GN |
7388 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
7389 | struct kvm_async_pf *work) | |
7390 | { | |
6389ee94 AK |
7391 | struct x86_exception fault; |
7392 | ||
7c90705b | 7393 | trace_kvm_async_pf_not_present(work->arch.token, work->gva); |
af585b92 | 7394 | kvm_add_async_pf_gfn(vcpu, work->arch.gfn); |
7c90705b GN |
7395 | |
7396 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) || | |
fc5f06fa GN |
7397 | (vcpu->arch.apf.send_user_only && |
7398 | kvm_x86_ops->get_cpl(vcpu) == 0)) | |
7c90705b GN |
7399 | kvm_make_request(KVM_REQ_APF_HALT, vcpu); |
7400 | else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) { | |
6389ee94 AK |
7401 | fault.vector = PF_VECTOR; |
7402 | fault.error_code_valid = true; | |
7403 | fault.error_code = 0; | |
7404 | fault.nested_page_fault = false; | |
7405 | fault.address = work->arch.token; | |
7406 | kvm_inject_page_fault(vcpu, &fault); | |
7c90705b | 7407 | } |
af585b92 GN |
7408 | } |
7409 | ||
7410 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
7411 | struct kvm_async_pf *work) | |
7412 | { | |
6389ee94 AK |
7413 | struct x86_exception fault; |
7414 | ||
7c90705b | 7415 | trace_kvm_async_pf_ready(work->arch.token, work->gva); |
f2e10669 | 7416 | if (work->wakeup_all) |
7c90705b GN |
7417 | work->arch.token = ~0; /* broadcast wakeup */ |
7418 | else | |
7419 | kvm_del_async_pf_gfn(vcpu, work->arch.gfn); | |
7420 | ||
7421 | if ((vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) && | |
7422 | !apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) { | |
6389ee94 AK |
7423 | fault.vector = PF_VECTOR; |
7424 | fault.error_code_valid = true; | |
7425 | fault.error_code = 0; | |
7426 | fault.nested_page_fault = false; | |
7427 | fault.address = work->arch.token; | |
7428 | kvm_inject_page_fault(vcpu, &fault); | |
7c90705b | 7429 | } |
e6d53e3b | 7430 | vcpu->arch.apf.halted = false; |
a4fa1635 | 7431 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
7c90705b GN |
7432 | } |
7433 | ||
7434 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
7435 | { | |
7436 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED)) | |
7437 | return true; | |
7438 | else | |
7439 | return !kvm_event_needs_reinjection(vcpu) && | |
7440 | kvm_x86_ops->interrupt_allowed(vcpu); | |
af585b92 GN |
7441 | } |
7442 | ||
e0f0bbc5 AW |
7443 | void kvm_arch_register_noncoherent_dma(struct kvm *kvm) |
7444 | { | |
7445 | atomic_inc(&kvm->arch.noncoherent_dma_count); | |
7446 | } | |
7447 | EXPORT_SYMBOL_GPL(kvm_arch_register_noncoherent_dma); | |
7448 | ||
7449 | void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm) | |
7450 | { | |
7451 | atomic_dec(&kvm->arch.noncoherent_dma_count); | |
7452 | } | |
7453 | EXPORT_SYMBOL_GPL(kvm_arch_unregister_noncoherent_dma); | |
7454 | ||
7455 | bool kvm_arch_has_noncoherent_dma(struct kvm *kvm) | |
7456 | { | |
7457 | return atomic_read(&kvm->arch.noncoherent_dma_count); | |
7458 | } | |
7459 | EXPORT_SYMBOL_GPL(kvm_arch_has_noncoherent_dma); | |
7460 | ||
229456fc MT |
7461 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
7462 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); | |
7463 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
7464 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
7465 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 7466 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 7467 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 7468 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 7469 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 7470 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 7471 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
2e554e8d | 7472 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |
489223ed | 7473 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_write_tsc_offset); |