Commit | Line | Data |
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043405e1 CO |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * derived from drivers/kvm/kvm_main.c | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
4d5c5d0f BAY |
7 | * Copyright (C) 2008 Qumranet, Inc. |
8 | * Copyright IBM Corporation, 2008 | |
9611c187 | 9 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
043405e1 CO |
10 | * |
11 | * Authors: | |
12 | * Avi Kivity <avi@qumranet.com> | |
13 | * Yaniv Kamay <yaniv@qumranet.com> | |
4d5c5d0f BAY |
14 | * Amit Shah <amit.shah@qumranet.com> |
15 | * Ben-Ami Yassour <benami@il.ibm.com> | |
043405e1 CO |
16 | * |
17 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
18 | * the COPYING file in the top-level directory. | |
19 | * | |
20 | */ | |
21 | ||
edf88417 | 22 | #include <linux/kvm_host.h> |
313a3dc7 | 23 | #include "irq.h" |
1d737c8a | 24 | #include "mmu.h" |
7837699f | 25 | #include "i8254.h" |
37817f29 | 26 | #include "tss.h" |
5fdbf976 | 27 | #include "kvm_cache_regs.h" |
26eef70c | 28 | #include "x86.h" |
00b27a3e | 29 | #include "cpuid.h" |
c9eab58f | 30 | #include "assigned-dev.h" |
474a5bb9 | 31 | #include "pmu.h" |
e83d5887 | 32 | #include "hyperv.h" |
313a3dc7 | 33 | |
18068523 | 34 | #include <linux/clocksource.h> |
4d5c5d0f | 35 | #include <linux/interrupt.h> |
313a3dc7 CO |
36 | #include <linux/kvm.h> |
37 | #include <linux/fs.h> | |
38 | #include <linux/vmalloc.h> | |
5fb76f9b | 39 | #include <linux/module.h> |
0de10343 | 40 | #include <linux/mman.h> |
2bacc55c | 41 | #include <linux/highmem.h> |
19de40a8 | 42 | #include <linux/iommu.h> |
62c476c7 | 43 | #include <linux/intel-iommu.h> |
c8076604 | 44 | #include <linux/cpufreq.h> |
18863bdd | 45 | #include <linux/user-return-notifier.h> |
a983fb23 | 46 | #include <linux/srcu.h> |
5a0e3ad6 | 47 | #include <linux/slab.h> |
ff9d07a0 | 48 | #include <linux/perf_event.h> |
7bee342a | 49 | #include <linux/uaccess.h> |
af585b92 | 50 | #include <linux/hash.h> |
a1b60c1c | 51 | #include <linux/pci.h> |
16e8d74d MT |
52 | #include <linux/timekeeper_internal.h> |
53 | #include <linux/pvclock_gtod.h> | |
aec51dc4 | 54 | #include <trace/events/kvm.h> |
2ed152af | 55 | |
229456fc MT |
56 | #define CREATE_TRACE_POINTS |
57 | #include "trace.h" | |
043405e1 | 58 | |
24f1e32c | 59 | #include <asm/debugreg.h> |
d825ed0a | 60 | #include <asm/msr.h> |
a5f61300 | 61 | #include <asm/desc.h> |
890ca9ae | 62 | #include <asm/mce.h> |
f89e32e0 | 63 | #include <linux/kernel_stat.h> |
78f7f1e5 | 64 | #include <asm/fpu/internal.h> /* Ugh! */ |
1d5f066e | 65 | #include <asm/pvclock.h> |
217fc9cf | 66 | #include <asm/div64.h> |
043405e1 | 67 | |
313a3dc7 | 68 | #define MAX_IO_MSRS 256 |
890ca9ae | 69 | #define KVM_MAX_MCE_BANKS 32 |
5854dbca | 70 | #define KVM_MCE_CAP_SUPPORTED (MCG_CTL_P | MCG_SER_P) |
890ca9ae | 71 | |
0f65dd70 AK |
72 | #define emul_to_vcpu(ctxt) \ |
73 | container_of(ctxt, struct kvm_vcpu, arch.emulate_ctxt) | |
74 | ||
50a37eb4 JR |
75 | /* EFER defaults: |
76 | * - enable syscall per default because its emulated by KVM | |
77 | * - enable LME and LMA per default on 64 bit KVM | |
78 | */ | |
79 | #ifdef CONFIG_X86_64 | |
1260edbe LJ |
80 | static |
81 | u64 __read_mostly efer_reserved_bits = ~((u64)(EFER_SCE | EFER_LME | EFER_LMA)); | |
50a37eb4 | 82 | #else |
1260edbe | 83 | static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE); |
50a37eb4 | 84 | #endif |
313a3dc7 | 85 | |
ba1389b7 AK |
86 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
87 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 88 | |
cb142eb7 | 89 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
7460fb4a | 90 | static void process_nmi(struct kvm_vcpu *vcpu); |
6addfc42 | 91 | static void __kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); |
674eea0f | 92 | |
97896d04 | 93 | struct kvm_x86_ops *kvm_x86_ops; |
5fdbf976 | 94 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 95 | |
476bc001 RR |
96 | static bool ignore_msrs = 0; |
97 | module_param(ignore_msrs, bool, S_IRUGO | S_IWUSR); | |
ed85c068 | 98 | |
9ed96e87 MT |
99 | unsigned int min_timer_period_us = 500; |
100 | module_param(min_timer_period_us, uint, S_IRUGO | S_IWUSR); | |
101 | ||
630994b3 MT |
102 | static bool __read_mostly kvmclock_periodic_sync = true; |
103 | module_param(kvmclock_periodic_sync, bool, S_IRUGO); | |
104 | ||
92a1f12d JR |
105 | bool kvm_has_tsc_control; |
106 | EXPORT_SYMBOL_GPL(kvm_has_tsc_control); | |
107 | u32 kvm_max_guest_tsc_khz; | |
108 | EXPORT_SYMBOL_GPL(kvm_max_guest_tsc_khz); | |
109 | ||
cc578287 ZA |
110 | /* tsc tolerance in parts per million - default to 1/2 of the NTP threshold */ |
111 | static u32 tsc_tolerance_ppm = 250; | |
112 | module_param(tsc_tolerance_ppm, uint, S_IRUGO | S_IWUSR); | |
113 | ||
d0659d94 MT |
114 | /* lapic timer advance (tscdeadline mode only) in nanoseconds */ |
115 | unsigned int lapic_timer_advance_ns = 0; | |
116 | module_param(lapic_timer_advance_ns, uint, S_IRUGO | S_IWUSR); | |
117 | ||
16a96021 MT |
118 | static bool backwards_tsc_observed = false; |
119 | ||
18863bdd AK |
120 | #define KVM_NR_SHARED_MSRS 16 |
121 | ||
122 | struct kvm_shared_msrs_global { | |
123 | int nr; | |
2bf78fa7 | 124 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
125 | }; |
126 | ||
127 | struct kvm_shared_msrs { | |
128 | struct user_return_notifier urn; | |
129 | bool registered; | |
2bf78fa7 SY |
130 | struct kvm_shared_msr_values { |
131 | u64 host; | |
132 | u64 curr; | |
133 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
134 | }; |
135 | ||
136 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
013f6a5d | 137 | static struct kvm_shared_msrs __percpu *shared_msrs; |
18863bdd | 138 | |
417bc304 | 139 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
140 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
141 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
142 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
143 | { "invlpg", VCPU_STAT(invlpg) }, | |
144 | { "exits", VCPU_STAT(exits) }, | |
145 | { "io_exits", VCPU_STAT(io_exits) }, | |
146 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
147 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
148 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 149 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 | 150 | { "halt_exits", VCPU_STAT(halt_exits) }, |
f7819512 | 151 | { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, |
ba1389b7 | 152 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f11c3a8d | 153 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
154 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
155 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
156 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
157 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
158 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
159 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
160 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 161 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 162 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
163 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
164 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
165 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
166 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
167 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
168 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 169 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 170 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 171 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 172 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
173 | { NULL } |
174 | }; | |
175 | ||
2acf923e DC |
176 | u64 __read_mostly host_xcr0; |
177 | ||
b6785def | 178 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt); |
d6aa1000 | 179 | |
af585b92 GN |
180 | static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu) |
181 | { | |
182 | int i; | |
183 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU); i++) | |
184 | vcpu->arch.apf.gfns[i] = ~0; | |
185 | } | |
186 | ||
18863bdd AK |
187 | static void kvm_on_user_return(struct user_return_notifier *urn) |
188 | { | |
189 | unsigned slot; | |
18863bdd AK |
190 | struct kvm_shared_msrs *locals |
191 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 192 | struct kvm_shared_msr_values *values; |
18863bdd AK |
193 | |
194 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { | |
2bf78fa7 SY |
195 | values = &locals->values[slot]; |
196 | if (values->host != values->curr) { | |
197 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
198 | values->curr = values->host; | |
18863bdd AK |
199 | } |
200 | } | |
201 | locals->registered = false; | |
202 | user_return_notifier_unregister(urn); | |
203 | } | |
204 | ||
2bf78fa7 | 205 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 206 | { |
18863bdd | 207 | u64 value; |
013f6a5d MT |
208 | unsigned int cpu = smp_processor_id(); |
209 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
18863bdd | 210 | |
2bf78fa7 SY |
211 | /* only read, and nobody should modify it at this time, |
212 | * so don't need lock */ | |
213 | if (slot >= shared_msrs_global.nr) { | |
214 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
215 | return; | |
216 | } | |
217 | rdmsrl_safe(msr, &value); | |
218 | smsr->values[slot].host = value; | |
219 | smsr->values[slot].curr = value; | |
220 | } | |
221 | ||
222 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
223 | { | |
0123be42 | 224 | BUG_ON(slot >= KVM_NR_SHARED_MSRS); |
c847fe88 | 225 | shared_msrs_global.msrs[slot] = msr; |
18863bdd AK |
226 | if (slot >= shared_msrs_global.nr) |
227 | shared_msrs_global.nr = slot + 1; | |
18863bdd AK |
228 | } |
229 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
230 | ||
231 | static void kvm_shared_msr_cpu_online(void) | |
232 | { | |
233 | unsigned i; | |
18863bdd AK |
234 | |
235 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 236 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
237 | } |
238 | ||
8b3c3104 | 239 | int kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd | 240 | { |
013f6a5d MT |
241 | unsigned int cpu = smp_processor_id(); |
242 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
8b3c3104 | 243 | int err; |
18863bdd | 244 | |
2bf78fa7 | 245 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
8b3c3104 | 246 | return 0; |
2bf78fa7 | 247 | smsr->values[slot].curr = value; |
8b3c3104 AH |
248 | err = wrmsrl_safe(shared_msrs_global.msrs[slot], value); |
249 | if (err) | |
250 | return 1; | |
251 | ||
18863bdd AK |
252 | if (!smsr->registered) { |
253 | smsr->urn.on_user_return = kvm_on_user_return; | |
254 | user_return_notifier_register(&smsr->urn); | |
255 | smsr->registered = true; | |
256 | } | |
8b3c3104 | 257 | return 0; |
18863bdd AK |
258 | } |
259 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
260 | ||
13a34e06 | 261 | static void drop_user_return_notifiers(void) |
3548bab5 | 262 | { |
013f6a5d MT |
263 | unsigned int cpu = smp_processor_id(); |
264 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
3548bab5 AK |
265 | |
266 | if (smsr->registered) | |
267 | kvm_on_user_return(&smsr->urn); | |
268 | } | |
269 | ||
6866b83e CO |
270 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
271 | { | |
8a5a87d9 | 272 | return vcpu->arch.apic_base; |
6866b83e CO |
273 | } |
274 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
275 | ||
58cb628d JK |
276 | int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
277 | { | |
278 | u64 old_state = vcpu->arch.apic_base & | |
279 | (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); | |
280 | u64 new_state = msr_info->data & | |
281 | (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); | |
282 | u64 reserved_bits = ((~0ULL) << cpuid_maxphyaddr(vcpu)) | | |
283 | 0x2ff | (guest_cpuid_has_x2apic(vcpu) ? 0 : X2APIC_ENABLE); | |
284 | ||
285 | if (!msr_info->host_initiated && | |
286 | ((msr_info->data & reserved_bits) != 0 || | |
287 | new_state == X2APIC_ENABLE || | |
288 | (new_state == MSR_IA32_APICBASE_ENABLE && | |
289 | old_state == (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE)) || | |
290 | (new_state == (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE) && | |
291 | old_state == 0))) | |
292 | return 1; | |
293 | ||
294 | kvm_lapic_set_base(vcpu, msr_info->data); | |
295 | return 0; | |
6866b83e CO |
296 | } |
297 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
298 | ||
2605fc21 | 299 | asmlinkage __visible void kvm_spurious_fault(void) |
e3ba45b8 GL |
300 | { |
301 | /* Fault while not rebooting. We want the trace. */ | |
302 | BUG(); | |
303 | } | |
304 | EXPORT_SYMBOL_GPL(kvm_spurious_fault); | |
305 | ||
3fd28fce ED |
306 | #define EXCPT_BENIGN 0 |
307 | #define EXCPT_CONTRIBUTORY 1 | |
308 | #define EXCPT_PF 2 | |
309 | ||
310 | static int exception_class(int vector) | |
311 | { | |
312 | switch (vector) { | |
313 | case PF_VECTOR: | |
314 | return EXCPT_PF; | |
315 | case DE_VECTOR: | |
316 | case TS_VECTOR: | |
317 | case NP_VECTOR: | |
318 | case SS_VECTOR: | |
319 | case GP_VECTOR: | |
320 | return EXCPT_CONTRIBUTORY; | |
321 | default: | |
322 | break; | |
323 | } | |
324 | return EXCPT_BENIGN; | |
325 | } | |
326 | ||
d6e8c854 NA |
327 | #define EXCPT_FAULT 0 |
328 | #define EXCPT_TRAP 1 | |
329 | #define EXCPT_ABORT 2 | |
330 | #define EXCPT_INTERRUPT 3 | |
331 | ||
332 | static int exception_type(int vector) | |
333 | { | |
334 | unsigned int mask; | |
335 | ||
336 | if (WARN_ON(vector > 31 || vector == NMI_VECTOR)) | |
337 | return EXCPT_INTERRUPT; | |
338 | ||
339 | mask = 1 << vector; | |
340 | ||
341 | /* #DB is trap, as instruction watchpoints are handled elsewhere */ | |
342 | if (mask & ((1 << DB_VECTOR) | (1 << BP_VECTOR) | (1 << OF_VECTOR))) | |
343 | return EXCPT_TRAP; | |
344 | ||
345 | if (mask & ((1 << DF_VECTOR) | (1 << MC_VECTOR))) | |
346 | return EXCPT_ABORT; | |
347 | ||
348 | /* Reserved exceptions will result in fault */ | |
349 | return EXCPT_FAULT; | |
350 | } | |
351 | ||
3fd28fce | 352 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, |
ce7ddec4 JR |
353 | unsigned nr, bool has_error, u32 error_code, |
354 | bool reinject) | |
3fd28fce ED |
355 | { |
356 | u32 prev_nr; | |
357 | int class1, class2; | |
358 | ||
3842d135 AK |
359 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
360 | ||
3fd28fce ED |
361 | if (!vcpu->arch.exception.pending) { |
362 | queue: | |
3ffb2468 NA |
363 | if (has_error && !is_protmode(vcpu)) |
364 | has_error = false; | |
3fd28fce ED |
365 | vcpu->arch.exception.pending = true; |
366 | vcpu->arch.exception.has_error_code = has_error; | |
367 | vcpu->arch.exception.nr = nr; | |
368 | vcpu->arch.exception.error_code = error_code; | |
3f0fd292 | 369 | vcpu->arch.exception.reinject = reinject; |
3fd28fce ED |
370 | return; |
371 | } | |
372 | ||
373 | /* to check exception */ | |
374 | prev_nr = vcpu->arch.exception.nr; | |
375 | if (prev_nr == DF_VECTOR) { | |
376 | /* triple fault -> shutdown */ | |
a8eeb04a | 377 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
3fd28fce ED |
378 | return; |
379 | } | |
380 | class1 = exception_class(prev_nr); | |
381 | class2 = exception_class(nr); | |
382 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
383 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
384 | /* generate double fault per SDM Table 5-5 */ | |
385 | vcpu->arch.exception.pending = true; | |
386 | vcpu->arch.exception.has_error_code = true; | |
387 | vcpu->arch.exception.nr = DF_VECTOR; | |
388 | vcpu->arch.exception.error_code = 0; | |
389 | } else | |
390 | /* replace previous exception with a new one in a hope | |
391 | that instruction re-execution will regenerate lost | |
392 | exception */ | |
393 | goto queue; | |
394 | } | |
395 | ||
298101da AK |
396 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
397 | { | |
ce7ddec4 | 398 | kvm_multiple_exception(vcpu, nr, false, 0, false); |
298101da AK |
399 | } |
400 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
401 | ||
ce7ddec4 JR |
402 | void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
403 | { | |
404 | kvm_multiple_exception(vcpu, nr, false, 0, true); | |
405 | } | |
406 | EXPORT_SYMBOL_GPL(kvm_requeue_exception); | |
407 | ||
db8fcefa | 408 | void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err) |
c3c91fee | 409 | { |
db8fcefa AP |
410 | if (err) |
411 | kvm_inject_gp(vcpu, 0); | |
412 | else | |
413 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
414 | } | |
415 | EXPORT_SYMBOL_GPL(kvm_complete_insn_gp); | |
8df25a32 | 416 | |
6389ee94 | 417 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
c3c91fee AK |
418 | { |
419 | ++vcpu->stat.pf_guest; | |
6389ee94 AK |
420 | vcpu->arch.cr2 = fault->address; |
421 | kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code); | |
c3c91fee | 422 | } |
27d6c865 | 423 | EXPORT_SYMBOL_GPL(kvm_inject_page_fault); |
c3c91fee | 424 | |
ef54bcfe | 425 | static bool kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
d4f8cf66 | 426 | { |
6389ee94 AK |
427 | if (mmu_is_nested(vcpu) && !fault->nested_page_fault) |
428 | vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault); | |
d4f8cf66 | 429 | else |
6389ee94 | 430 | vcpu->arch.mmu.inject_page_fault(vcpu, fault); |
ef54bcfe PB |
431 | |
432 | return fault->nested_page_fault; | |
d4f8cf66 JR |
433 | } |
434 | ||
3419ffc8 SY |
435 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
436 | { | |
7460fb4a AK |
437 | atomic_inc(&vcpu->arch.nmi_queued); |
438 | kvm_make_request(KVM_REQ_NMI, vcpu); | |
3419ffc8 SY |
439 | } |
440 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
441 | ||
298101da AK |
442 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
443 | { | |
ce7ddec4 | 444 | kvm_multiple_exception(vcpu, nr, true, error_code, false); |
298101da AK |
445 | } |
446 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
447 | ||
ce7ddec4 JR |
448 | void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
449 | { | |
450 | kvm_multiple_exception(vcpu, nr, true, error_code, true); | |
451 | } | |
452 | EXPORT_SYMBOL_GPL(kvm_requeue_exception_e); | |
453 | ||
0a79b009 AK |
454 | /* |
455 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
456 | * a #GP and return false. | |
457 | */ | |
458 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 459 | { |
0a79b009 AK |
460 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
461 | return true; | |
462 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
463 | return false; | |
298101da | 464 | } |
0a79b009 | 465 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 466 | |
16f8a6f9 NA |
467 | bool kvm_require_dr(struct kvm_vcpu *vcpu, int dr) |
468 | { | |
469 | if ((dr != 4 && dr != 5) || !kvm_read_cr4_bits(vcpu, X86_CR4_DE)) | |
470 | return true; | |
471 | ||
472 | kvm_queue_exception(vcpu, UD_VECTOR); | |
473 | return false; | |
474 | } | |
475 | EXPORT_SYMBOL_GPL(kvm_require_dr); | |
476 | ||
ec92fe44 JR |
477 | /* |
478 | * This function will be used to read from the physical memory of the currently | |
54bf36aa | 479 | * running guest. The difference to kvm_vcpu_read_guest_page is that this function |
ec92fe44 JR |
480 | * can read from guest physical or from the guest's guest physical memory. |
481 | */ | |
482 | int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, | |
483 | gfn_t ngfn, void *data, int offset, int len, | |
484 | u32 access) | |
485 | { | |
54987b7a | 486 | struct x86_exception exception; |
ec92fe44 JR |
487 | gfn_t real_gfn; |
488 | gpa_t ngpa; | |
489 | ||
490 | ngpa = gfn_to_gpa(ngfn); | |
54987b7a | 491 | real_gfn = mmu->translate_gpa(vcpu, ngpa, access, &exception); |
ec92fe44 JR |
492 | if (real_gfn == UNMAPPED_GVA) |
493 | return -EFAULT; | |
494 | ||
495 | real_gfn = gpa_to_gfn(real_gfn); | |
496 | ||
54bf36aa | 497 | return kvm_vcpu_read_guest_page(vcpu, real_gfn, data, offset, len); |
ec92fe44 JR |
498 | } |
499 | EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu); | |
500 | ||
69b0049a | 501 | static int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, |
3d06b8bf JR |
502 | void *data, int offset, int len, u32 access) |
503 | { | |
504 | return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn, | |
505 | data, offset, len, access); | |
506 | } | |
507 | ||
a03490ed CO |
508 | /* |
509 | * Load the pae pdptrs. Return true is they are all valid. | |
510 | */ | |
ff03a073 | 511 | int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3) |
a03490ed CO |
512 | { |
513 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
514 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
515 | int i; | |
516 | int ret; | |
ff03a073 | 517 | u64 pdpte[ARRAY_SIZE(mmu->pdptrs)]; |
a03490ed | 518 | |
ff03a073 JR |
519 | ret = kvm_read_guest_page_mmu(vcpu, mmu, pdpt_gfn, pdpte, |
520 | offset * sizeof(u64), sizeof(pdpte), | |
521 | PFERR_USER_MASK|PFERR_WRITE_MASK); | |
a03490ed CO |
522 | if (ret < 0) { |
523 | ret = 0; | |
524 | goto out; | |
525 | } | |
526 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
43a3795a | 527 | if (is_present_gpte(pdpte[i]) && |
a0a64f50 XG |
528 | (pdpte[i] & |
529 | vcpu->arch.mmu.guest_rsvd_check.rsvd_bits_mask[0][2])) { | |
a03490ed CO |
530 | ret = 0; |
531 | goto out; | |
532 | } | |
533 | } | |
534 | ret = 1; | |
535 | ||
ff03a073 | 536 | memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs)); |
6de4f3ad AK |
537 | __set_bit(VCPU_EXREG_PDPTR, |
538 | (unsigned long *)&vcpu->arch.regs_avail); | |
539 | __set_bit(VCPU_EXREG_PDPTR, | |
540 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 541 | out: |
a03490ed CO |
542 | |
543 | return ret; | |
544 | } | |
cc4b6871 | 545 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 546 | |
d835dfec AK |
547 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
548 | { | |
ff03a073 | 549 | u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)]; |
d835dfec | 550 | bool changed = true; |
3d06b8bf JR |
551 | int offset; |
552 | gfn_t gfn; | |
d835dfec AK |
553 | int r; |
554 | ||
555 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
556 | return false; | |
557 | ||
6de4f3ad AK |
558 | if (!test_bit(VCPU_EXREG_PDPTR, |
559 | (unsigned long *)&vcpu->arch.regs_avail)) | |
560 | return true; | |
561 | ||
9f8fe504 AK |
562 | gfn = (kvm_read_cr3(vcpu) & ~31u) >> PAGE_SHIFT; |
563 | offset = (kvm_read_cr3(vcpu) & ~31u) & (PAGE_SIZE - 1); | |
3d06b8bf JR |
564 | r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte), |
565 | PFERR_USER_MASK | PFERR_WRITE_MASK); | |
d835dfec AK |
566 | if (r < 0) |
567 | goto out; | |
ff03a073 | 568 | changed = memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 569 | out: |
d835dfec AK |
570 | |
571 | return changed; | |
572 | } | |
573 | ||
49a9b07e | 574 | int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed | 575 | { |
aad82703 | 576 | unsigned long old_cr0 = kvm_read_cr0(vcpu); |
d81135a5 | 577 | unsigned long update_bits = X86_CR0_PG | X86_CR0_WP; |
aad82703 | 578 | |
f9a48e6a AK |
579 | cr0 |= X86_CR0_ET; |
580 | ||
ab344828 | 581 | #ifdef CONFIG_X86_64 |
0f12244f GN |
582 | if (cr0 & 0xffffffff00000000UL) |
583 | return 1; | |
ab344828 GN |
584 | #endif |
585 | ||
586 | cr0 &= ~CR0_RESERVED_BITS; | |
a03490ed | 587 | |
0f12244f GN |
588 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) |
589 | return 1; | |
a03490ed | 590 | |
0f12244f GN |
591 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) |
592 | return 1; | |
a03490ed CO |
593 | |
594 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
595 | #ifdef CONFIG_X86_64 | |
f6801dff | 596 | if ((vcpu->arch.efer & EFER_LME)) { |
a03490ed CO |
597 | int cs_db, cs_l; |
598 | ||
0f12244f GN |
599 | if (!is_pae(vcpu)) |
600 | return 1; | |
a03490ed | 601 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
0f12244f GN |
602 | if (cs_l) |
603 | return 1; | |
a03490ed CO |
604 | } else |
605 | #endif | |
ff03a073 | 606 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
9f8fe504 | 607 | kvm_read_cr3(vcpu))) |
0f12244f | 608 | return 1; |
a03490ed CO |
609 | } |
610 | ||
ad756a16 MJ |
611 | if (!(cr0 & X86_CR0_PG) && kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE)) |
612 | return 1; | |
613 | ||
a03490ed | 614 | kvm_x86_ops->set_cr0(vcpu, cr0); |
a03490ed | 615 | |
d170c419 | 616 | if ((cr0 ^ old_cr0) & X86_CR0_PG) { |
e5f3f027 | 617 | kvm_clear_async_pf_completion_queue(vcpu); |
d170c419 LJ |
618 | kvm_async_pf_hash_reset(vcpu); |
619 | } | |
e5f3f027 | 620 | |
aad82703 SY |
621 | if ((cr0 ^ old_cr0) & update_bits) |
622 | kvm_mmu_reset_context(vcpu); | |
b18d5431 XG |
623 | |
624 | if ((cr0 ^ old_cr0) & X86_CR0_CD) | |
625 | kvm_zap_gfn_range(vcpu->kvm, 0, ~0ULL); | |
626 | ||
0f12244f GN |
627 | return 0; |
628 | } | |
2d3ad1f4 | 629 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 630 | |
2d3ad1f4 | 631 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 632 | { |
49a9b07e | 633 | (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f)); |
a03490ed | 634 | } |
2d3ad1f4 | 635 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 636 | |
42bdf991 MT |
637 | static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu) |
638 | { | |
639 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) && | |
640 | !vcpu->guest_xcr0_loaded) { | |
641 | /* kvm_set_xcr() also depends on this */ | |
642 | xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0); | |
643 | vcpu->guest_xcr0_loaded = 1; | |
644 | } | |
645 | } | |
646 | ||
647 | static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu) | |
648 | { | |
649 | if (vcpu->guest_xcr0_loaded) { | |
650 | if (vcpu->arch.xcr0 != host_xcr0) | |
651 | xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0); | |
652 | vcpu->guest_xcr0_loaded = 0; | |
653 | } | |
654 | } | |
655 | ||
69b0049a | 656 | static int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) |
2acf923e | 657 | { |
56c103ec LJ |
658 | u64 xcr0 = xcr; |
659 | u64 old_xcr0 = vcpu->arch.xcr0; | |
46c34cb0 | 660 | u64 valid_bits; |
2acf923e DC |
661 | |
662 | /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */ | |
663 | if (index != XCR_XFEATURE_ENABLED_MASK) | |
664 | return 1; | |
2acf923e DC |
665 | if (!(xcr0 & XSTATE_FP)) |
666 | return 1; | |
667 | if ((xcr0 & XSTATE_YMM) && !(xcr0 & XSTATE_SSE)) | |
668 | return 1; | |
46c34cb0 PB |
669 | |
670 | /* | |
671 | * Do not allow the guest to set bits that we do not support | |
672 | * saving. However, xcr0 bit 0 is always set, even if the | |
673 | * emulated CPU does not support XSAVE (see fx_init). | |
674 | */ | |
675 | valid_bits = vcpu->arch.guest_supported_xcr0 | XSTATE_FP; | |
676 | if (xcr0 & ~valid_bits) | |
2acf923e | 677 | return 1; |
46c34cb0 | 678 | |
390bd528 LJ |
679 | if ((!(xcr0 & XSTATE_BNDREGS)) != (!(xcr0 & XSTATE_BNDCSR))) |
680 | return 1; | |
681 | ||
612263b3 CP |
682 | if (xcr0 & XSTATE_AVX512) { |
683 | if (!(xcr0 & XSTATE_YMM)) | |
684 | return 1; | |
685 | if ((xcr0 & XSTATE_AVX512) != XSTATE_AVX512) | |
686 | return 1; | |
687 | } | |
42bdf991 | 688 | kvm_put_guest_xcr0(vcpu); |
2acf923e | 689 | vcpu->arch.xcr0 = xcr0; |
56c103ec LJ |
690 | |
691 | if ((xcr0 ^ old_xcr0) & XSTATE_EXTEND_MASK) | |
692 | kvm_update_cpuid(vcpu); | |
2acf923e DC |
693 | return 0; |
694 | } | |
695 | ||
696 | int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) | |
697 | { | |
764bcbc5 Z |
698 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || |
699 | __kvm_set_xcr(vcpu, index, xcr)) { | |
2acf923e DC |
700 | kvm_inject_gp(vcpu, 0); |
701 | return 1; | |
702 | } | |
703 | return 0; | |
704 | } | |
705 | EXPORT_SYMBOL_GPL(kvm_set_xcr); | |
706 | ||
a83b29c6 | 707 | int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 708 | { |
fc78f519 | 709 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
0be0226f XG |
710 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE | |
711 | X86_CR4_SMEP | X86_CR4_SMAP; | |
712 | ||
0f12244f GN |
713 | if (cr4 & CR4_RESERVED_BITS) |
714 | return 1; | |
a03490ed | 715 | |
2acf923e DC |
716 | if (!guest_cpuid_has_xsave(vcpu) && (cr4 & X86_CR4_OSXSAVE)) |
717 | return 1; | |
718 | ||
c68b734f YW |
719 | if (!guest_cpuid_has_smep(vcpu) && (cr4 & X86_CR4_SMEP)) |
720 | return 1; | |
721 | ||
97ec8c06 FW |
722 | if (!guest_cpuid_has_smap(vcpu) && (cr4 & X86_CR4_SMAP)) |
723 | return 1; | |
724 | ||
afcbf13f | 725 | if (!guest_cpuid_has_fsgsbase(vcpu) && (cr4 & X86_CR4_FSGSBASE)) |
74dc2b4f YW |
726 | return 1; |
727 | ||
a03490ed | 728 | if (is_long_mode(vcpu)) { |
0f12244f GN |
729 | if (!(cr4 & X86_CR4_PAE)) |
730 | return 1; | |
a2edf57f AK |
731 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
732 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
9f8fe504 AK |
733 | && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
734 | kvm_read_cr3(vcpu))) | |
0f12244f GN |
735 | return 1; |
736 | ||
ad756a16 MJ |
737 | if ((cr4 & X86_CR4_PCIDE) && !(old_cr4 & X86_CR4_PCIDE)) { |
738 | if (!guest_cpuid_has_pcid(vcpu)) | |
739 | return 1; | |
740 | ||
741 | /* PCID can not be enabled when cr3[11:0]!=000H or EFER.LMA=0 */ | |
742 | if ((kvm_read_cr3(vcpu) & X86_CR3_PCID_MASK) || !is_long_mode(vcpu)) | |
743 | return 1; | |
744 | } | |
745 | ||
5e1746d6 | 746 | if (kvm_x86_ops->set_cr4(vcpu, cr4)) |
0f12244f | 747 | return 1; |
a03490ed | 748 | |
ad756a16 MJ |
749 | if (((cr4 ^ old_cr4) & pdptr_bits) || |
750 | (!(cr4 & X86_CR4_PCIDE) && (old_cr4 & X86_CR4_PCIDE))) | |
aad82703 | 751 | kvm_mmu_reset_context(vcpu); |
0f12244f | 752 | |
2acf923e | 753 | if ((cr4 ^ old_cr4) & X86_CR4_OSXSAVE) |
00b27a3e | 754 | kvm_update_cpuid(vcpu); |
2acf923e | 755 | |
0f12244f GN |
756 | return 0; |
757 | } | |
2d3ad1f4 | 758 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 759 | |
2390218b | 760 | int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 761 | { |
ac146235 | 762 | #ifdef CONFIG_X86_64 |
9d88fca7 | 763 | cr3 &= ~CR3_PCID_INVD; |
ac146235 | 764 | #endif |
9d88fca7 | 765 | |
9f8fe504 | 766 | if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) { |
0ba73cda | 767 | kvm_mmu_sync_roots(vcpu); |
77c3913b | 768 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
0f12244f | 769 | return 0; |
d835dfec AK |
770 | } |
771 | ||
a03490ed | 772 | if (is_long_mode(vcpu)) { |
d9f89b88 JK |
773 | if (cr3 & CR3_L_MODE_RESERVED_BITS) |
774 | return 1; | |
775 | } else if (is_pae(vcpu) && is_paging(vcpu) && | |
776 | !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) | |
346874c9 | 777 | return 1; |
a03490ed | 778 | |
0f12244f | 779 | vcpu->arch.cr3 = cr3; |
aff48baa | 780 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
d8d173da | 781 | kvm_mmu_new_cr3(vcpu); |
0f12244f GN |
782 | return 0; |
783 | } | |
2d3ad1f4 | 784 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 785 | |
eea1cff9 | 786 | int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed | 787 | { |
0f12244f GN |
788 | if (cr8 & CR8_RESERVED_BITS) |
789 | return 1; | |
a03490ed CO |
790 | if (irqchip_in_kernel(vcpu->kvm)) |
791 | kvm_lapic_set_tpr(vcpu, cr8); | |
792 | else | |
ad312c7c | 793 | vcpu->arch.cr8 = cr8; |
0f12244f GN |
794 | return 0; |
795 | } | |
2d3ad1f4 | 796 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 797 | |
2d3ad1f4 | 798 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed CO |
799 | { |
800 | if (irqchip_in_kernel(vcpu->kvm)) | |
801 | return kvm_lapic_get_cr8(vcpu); | |
802 | else | |
ad312c7c | 803 | return vcpu->arch.cr8; |
a03490ed | 804 | } |
2d3ad1f4 | 805 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 806 | |
ae561ede NA |
807 | static void kvm_update_dr0123(struct kvm_vcpu *vcpu) |
808 | { | |
809 | int i; | |
810 | ||
811 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) { | |
812 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
813 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
814 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_RELOAD; | |
815 | } | |
816 | } | |
817 | ||
73aaf249 JK |
818 | static void kvm_update_dr6(struct kvm_vcpu *vcpu) |
819 | { | |
820 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
821 | kvm_x86_ops->set_dr6(vcpu, vcpu->arch.dr6); | |
822 | } | |
823 | ||
c8639010 JK |
824 | static void kvm_update_dr7(struct kvm_vcpu *vcpu) |
825 | { | |
826 | unsigned long dr7; | |
827 | ||
828 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) | |
829 | dr7 = vcpu->arch.guest_debug_dr7; | |
830 | else | |
831 | dr7 = vcpu->arch.dr7; | |
832 | kvm_x86_ops->set_dr7(vcpu, dr7); | |
360b948d PB |
833 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_BP_ENABLED; |
834 | if (dr7 & DR7_BP_EN_MASK) | |
835 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_BP_ENABLED; | |
c8639010 JK |
836 | } |
837 | ||
6f43ed01 NA |
838 | static u64 kvm_dr6_fixed(struct kvm_vcpu *vcpu) |
839 | { | |
840 | u64 fixed = DR6_FIXED_1; | |
841 | ||
842 | if (!guest_cpuid_has_rtm(vcpu)) | |
843 | fixed |= DR6_RTM; | |
844 | return fixed; | |
845 | } | |
846 | ||
338dbc97 | 847 | static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
020df079 GN |
848 | { |
849 | switch (dr) { | |
850 | case 0 ... 3: | |
851 | vcpu->arch.db[dr] = val; | |
852 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
853 | vcpu->arch.eff_db[dr] = val; | |
854 | break; | |
855 | case 4: | |
020df079 GN |
856 | /* fall through */ |
857 | case 6: | |
338dbc97 GN |
858 | if (val & 0xffffffff00000000ULL) |
859 | return -1; /* #GP */ | |
6f43ed01 | 860 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | kvm_dr6_fixed(vcpu); |
73aaf249 | 861 | kvm_update_dr6(vcpu); |
020df079 GN |
862 | break; |
863 | case 5: | |
020df079 GN |
864 | /* fall through */ |
865 | default: /* 7 */ | |
338dbc97 GN |
866 | if (val & 0xffffffff00000000ULL) |
867 | return -1; /* #GP */ | |
020df079 | 868 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; |
c8639010 | 869 | kvm_update_dr7(vcpu); |
020df079 GN |
870 | break; |
871 | } | |
872 | ||
873 | return 0; | |
874 | } | |
338dbc97 GN |
875 | |
876 | int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) | |
877 | { | |
16f8a6f9 | 878 | if (__kvm_set_dr(vcpu, dr, val)) { |
338dbc97 | 879 | kvm_inject_gp(vcpu, 0); |
16f8a6f9 NA |
880 | return 1; |
881 | } | |
882 | return 0; | |
338dbc97 | 883 | } |
020df079 GN |
884 | EXPORT_SYMBOL_GPL(kvm_set_dr); |
885 | ||
16f8a6f9 | 886 | int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) |
020df079 GN |
887 | { |
888 | switch (dr) { | |
889 | case 0 ... 3: | |
890 | *val = vcpu->arch.db[dr]; | |
891 | break; | |
892 | case 4: | |
020df079 GN |
893 | /* fall through */ |
894 | case 6: | |
73aaf249 JK |
895 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
896 | *val = vcpu->arch.dr6; | |
897 | else | |
898 | *val = kvm_x86_ops->get_dr6(vcpu); | |
020df079 GN |
899 | break; |
900 | case 5: | |
020df079 GN |
901 | /* fall through */ |
902 | default: /* 7 */ | |
903 | *val = vcpu->arch.dr7; | |
904 | break; | |
905 | } | |
338dbc97 GN |
906 | return 0; |
907 | } | |
020df079 GN |
908 | EXPORT_SYMBOL_GPL(kvm_get_dr); |
909 | ||
022cd0e8 AK |
910 | bool kvm_rdpmc(struct kvm_vcpu *vcpu) |
911 | { | |
912 | u32 ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
913 | u64 data; | |
914 | int err; | |
915 | ||
c6702c9d | 916 | err = kvm_pmu_rdpmc(vcpu, ecx, &data); |
022cd0e8 AK |
917 | if (err) |
918 | return err; | |
919 | kvm_register_write(vcpu, VCPU_REGS_RAX, (u32)data); | |
920 | kvm_register_write(vcpu, VCPU_REGS_RDX, data >> 32); | |
921 | return err; | |
922 | } | |
923 | EXPORT_SYMBOL_GPL(kvm_rdpmc); | |
924 | ||
043405e1 CO |
925 | /* |
926 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
927 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
928 | * | |
929 | * This list is modified at module load time to reflect the | |
e3267cbb | 930 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
62ef68bb PB |
931 | * kvm-specific. Those are put in emulated_msrs; filtering of emulated_msrs |
932 | * may depend on host virtualization features rather than host cpu features. | |
043405e1 | 933 | */ |
e3267cbb | 934 | |
043405e1 CO |
935 | static u32 msrs_to_save[] = { |
936 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
8c06585d | 937 | MSR_STAR, |
043405e1 CO |
938 | #ifdef CONFIG_X86_64 |
939 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
940 | #endif | |
b3897a49 | 941 | MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA, |
0dd376e7 | 942 | MSR_IA32_FEATURE_CONTROL, MSR_IA32_BNDCFGS |
043405e1 CO |
943 | }; |
944 | ||
945 | static unsigned num_msrs_to_save; | |
946 | ||
62ef68bb PB |
947 | static u32 emulated_msrs[] = { |
948 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, | |
949 | MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW, | |
950 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, | |
951 | HV_X64_MSR_TIME_REF_COUNT, HV_X64_MSR_REFERENCE_TSC, | |
e7d9513b AS |
952 | HV_X64_MSR_CRASH_P0, HV_X64_MSR_CRASH_P1, HV_X64_MSR_CRASH_P2, |
953 | HV_X64_MSR_CRASH_P3, HV_X64_MSR_CRASH_P4, HV_X64_MSR_CRASH_CTL, | |
62ef68bb PB |
954 | HV_X64_MSR_APIC_ASSIST_PAGE, MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME, |
955 | MSR_KVM_PV_EOI_EN, | |
956 | ||
ba904635 | 957 | MSR_IA32_TSC_ADJUST, |
a3e06bbe | 958 | MSR_IA32_TSCDEADLINE, |
043405e1 | 959 | MSR_IA32_MISC_ENABLE, |
908e75f3 AK |
960 | MSR_IA32_MCG_STATUS, |
961 | MSR_IA32_MCG_CTL, | |
64d60670 | 962 | MSR_IA32_SMBASE, |
043405e1 CO |
963 | }; |
964 | ||
62ef68bb PB |
965 | static unsigned num_emulated_msrs; |
966 | ||
384bb783 | 967 | bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer) |
15c4a640 | 968 | { |
b69e8cae | 969 | if (efer & efer_reserved_bits) |
384bb783 | 970 | return false; |
15c4a640 | 971 | |
1b2fd70c AG |
972 | if (efer & EFER_FFXSR) { |
973 | struct kvm_cpuid_entry2 *feat; | |
974 | ||
975 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae | 976 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) |
384bb783 | 977 | return false; |
1b2fd70c AG |
978 | } |
979 | ||
d8017474 AG |
980 | if (efer & EFER_SVME) { |
981 | struct kvm_cpuid_entry2 *feat; | |
982 | ||
983 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae | 984 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) |
384bb783 | 985 | return false; |
d8017474 AG |
986 | } |
987 | ||
384bb783 JK |
988 | return true; |
989 | } | |
990 | EXPORT_SYMBOL_GPL(kvm_valid_efer); | |
991 | ||
992 | static int set_efer(struct kvm_vcpu *vcpu, u64 efer) | |
993 | { | |
994 | u64 old_efer = vcpu->arch.efer; | |
995 | ||
996 | if (!kvm_valid_efer(vcpu, efer)) | |
997 | return 1; | |
998 | ||
999 | if (is_paging(vcpu) | |
1000 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) | |
1001 | return 1; | |
1002 | ||
15c4a640 | 1003 | efer &= ~EFER_LMA; |
f6801dff | 1004 | efer |= vcpu->arch.efer & EFER_LMA; |
15c4a640 | 1005 | |
a3d204e2 SY |
1006 | kvm_x86_ops->set_efer(vcpu, efer); |
1007 | ||
aad82703 SY |
1008 | /* Update reserved bits */ |
1009 | if ((efer ^ old_efer) & EFER_NX) | |
1010 | kvm_mmu_reset_context(vcpu); | |
1011 | ||
b69e8cae | 1012 | return 0; |
15c4a640 CO |
1013 | } |
1014 | ||
f2b4b7dd JR |
1015 | void kvm_enable_efer_bits(u64 mask) |
1016 | { | |
1017 | efer_reserved_bits &= ~mask; | |
1018 | } | |
1019 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
1020 | ||
15c4a640 CO |
1021 | /* |
1022 | * Writes msr value into into the appropriate "register". | |
1023 | * Returns 0 on success, non-0 otherwise. | |
1024 | * Assumes vcpu_load() was already called. | |
1025 | */ | |
8fe8ab46 | 1026 | int kvm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
15c4a640 | 1027 | { |
854e8bb1 NA |
1028 | switch (msr->index) { |
1029 | case MSR_FS_BASE: | |
1030 | case MSR_GS_BASE: | |
1031 | case MSR_KERNEL_GS_BASE: | |
1032 | case MSR_CSTAR: | |
1033 | case MSR_LSTAR: | |
1034 | if (is_noncanonical_address(msr->data)) | |
1035 | return 1; | |
1036 | break; | |
1037 | case MSR_IA32_SYSENTER_EIP: | |
1038 | case MSR_IA32_SYSENTER_ESP: | |
1039 | /* | |
1040 | * IA32_SYSENTER_ESP and IA32_SYSENTER_EIP cause #GP if | |
1041 | * non-canonical address is written on Intel but not on | |
1042 | * AMD (which ignores the top 32-bits, because it does | |
1043 | * not implement 64-bit SYSENTER). | |
1044 | * | |
1045 | * 64-bit code should hence be able to write a non-canonical | |
1046 | * value on AMD. Making the address canonical ensures that | |
1047 | * vmentry does not fail on Intel after writing a non-canonical | |
1048 | * value, and that something deterministic happens if the guest | |
1049 | * invokes 64-bit SYSENTER. | |
1050 | */ | |
1051 | msr->data = get_canonical(msr->data); | |
1052 | } | |
8fe8ab46 | 1053 | return kvm_x86_ops->set_msr(vcpu, msr); |
15c4a640 | 1054 | } |
854e8bb1 | 1055 | EXPORT_SYMBOL_GPL(kvm_set_msr); |
15c4a640 | 1056 | |
313a3dc7 CO |
1057 | /* |
1058 | * Adapt set_msr() to msr_io()'s calling convention | |
1059 | */ | |
609e36d3 PB |
1060 | static int do_get_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1061 | { | |
1062 | struct msr_data msr; | |
1063 | int r; | |
1064 | ||
1065 | msr.index = index; | |
1066 | msr.host_initiated = true; | |
1067 | r = kvm_get_msr(vcpu, &msr); | |
1068 | if (r) | |
1069 | return r; | |
1070 | ||
1071 | *data = msr.data; | |
1072 | return 0; | |
1073 | } | |
1074 | ||
313a3dc7 CO |
1075 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1076 | { | |
8fe8ab46 WA |
1077 | struct msr_data msr; |
1078 | ||
1079 | msr.data = *data; | |
1080 | msr.index = index; | |
1081 | msr.host_initiated = true; | |
1082 | return kvm_set_msr(vcpu, &msr); | |
313a3dc7 CO |
1083 | } |
1084 | ||
16e8d74d MT |
1085 | #ifdef CONFIG_X86_64 |
1086 | struct pvclock_gtod_data { | |
1087 | seqcount_t seq; | |
1088 | ||
1089 | struct { /* extract of a clocksource struct */ | |
1090 | int vclock_mode; | |
1091 | cycle_t cycle_last; | |
1092 | cycle_t mask; | |
1093 | u32 mult; | |
1094 | u32 shift; | |
1095 | } clock; | |
1096 | ||
cbcf2dd3 TG |
1097 | u64 boot_ns; |
1098 | u64 nsec_base; | |
16e8d74d MT |
1099 | }; |
1100 | ||
1101 | static struct pvclock_gtod_data pvclock_gtod_data; | |
1102 | ||
1103 | static void update_pvclock_gtod(struct timekeeper *tk) | |
1104 | { | |
1105 | struct pvclock_gtod_data *vdata = &pvclock_gtod_data; | |
cbcf2dd3 TG |
1106 | u64 boot_ns; |
1107 | ||
876e7881 | 1108 | boot_ns = ktime_to_ns(ktime_add(tk->tkr_mono.base, tk->offs_boot)); |
16e8d74d MT |
1109 | |
1110 | write_seqcount_begin(&vdata->seq); | |
1111 | ||
1112 | /* copy pvclock gtod data */ | |
876e7881 PZ |
1113 | vdata->clock.vclock_mode = tk->tkr_mono.clock->archdata.vclock_mode; |
1114 | vdata->clock.cycle_last = tk->tkr_mono.cycle_last; | |
1115 | vdata->clock.mask = tk->tkr_mono.mask; | |
1116 | vdata->clock.mult = tk->tkr_mono.mult; | |
1117 | vdata->clock.shift = tk->tkr_mono.shift; | |
16e8d74d | 1118 | |
cbcf2dd3 | 1119 | vdata->boot_ns = boot_ns; |
876e7881 | 1120 | vdata->nsec_base = tk->tkr_mono.xtime_nsec; |
16e8d74d MT |
1121 | |
1122 | write_seqcount_end(&vdata->seq); | |
1123 | } | |
1124 | #endif | |
1125 | ||
bab5bb39 NK |
1126 | void kvm_set_pending_timer(struct kvm_vcpu *vcpu) |
1127 | { | |
1128 | /* | |
1129 | * Note: KVM_REQ_PENDING_TIMER is implicitly checked in | |
1130 | * vcpu_enter_guest. This function is only called from | |
1131 | * the physical CPU that is running vcpu. | |
1132 | */ | |
1133 | kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); | |
1134 | } | |
16e8d74d | 1135 | |
18068523 GOC |
1136 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
1137 | { | |
9ed3c444 AK |
1138 | int version; |
1139 | int r; | |
50d0a0f9 | 1140 | struct pvclock_wall_clock wc; |
923de3cf | 1141 | struct timespec boot; |
18068523 GOC |
1142 | |
1143 | if (!wall_clock) | |
1144 | return; | |
1145 | ||
9ed3c444 AK |
1146 | r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version)); |
1147 | if (r) | |
1148 | return; | |
1149 | ||
1150 | if (version & 1) | |
1151 | ++version; /* first time write, random junk */ | |
1152 | ||
1153 | ++version; | |
18068523 | 1154 | |
18068523 GOC |
1155 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
1156 | ||
50d0a0f9 GH |
1157 | /* |
1158 | * The guest calculates current wall clock time by adding | |
34c238a1 | 1159 | * system time (updated by kvm_guest_time_update below) to the |
50d0a0f9 GH |
1160 | * wall clock specified here. guest system time equals host |
1161 | * system time for us, thus we must fill in host boot time here. | |
1162 | */ | |
923de3cf | 1163 | getboottime(&boot); |
50d0a0f9 | 1164 | |
4b648665 BR |
1165 | if (kvm->arch.kvmclock_offset) { |
1166 | struct timespec ts = ns_to_timespec(kvm->arch.kvmclock_offset); | |
1167 | boot = timespec_sub(boot, ts); | |
1168 | } | |
50d0a0f9 GH |
1169 | wc.sec = boot.tv_sec; |
1170 | wc.nsec = boot.tv_nsec; | |
1171 | wc.version = version; | |
18068523 GOC |
1172 | |
1173 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
1174 | ||
1175 | version++; | |
1176 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
1177 | } |
1178 | ||
50d0a0f9 GH |
1179 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
1180 | { | |
1181 | uint32_t quotient, remainder; | |
1182 | ||
1183 | /* Don't try to replace with do_div(), this one calculates | |
1184 | * "(dividend << 32) / divisor" */ | |
1185 | __asm__ ( "divl %4" | |
1186 | : "=a" (quotient), "=d" (remainder) | |
1187 | : "0" (0), "1" (dividend), "r" (divisor) ); | |
1188 | return quotient; | |
1189 | } | |
1190 | ||
5f4e3f88 ZA |
1191 | static void kvm_get_time_scale(uint32_t scaled_khz, uint32_t base_khz, |
1192 | s8 *pshift, u32 *pmultiplier) | |
50d0a0f9 | 1193 | { |
5f4e3f88 | 1194 | uint64_t scaled64; |
50d0a0f9 GH |
1195 | int32_t shift = 0; |
1196 | uint64_t tps64; | |
1197 | uint32_t tps32; | |
1198 | ||
5f4e3f88 ZA |
1199 | tps64 = base_khz * 1000LL; |
1200 | scaled64 = scaled_khz * 1000LL; | |
50933623 | 1201 | while (tps64 > scaled64*2 || tps64 & 0xffffffff00000000ULL) { |
50d0a0f9 GH |
1202 | tps64 >>= 1; |
1203 | shift--; | |
1204 | } | |
1205 | ||
1206 | tps32 = (uint32_t)tps64; | |
50933623 JK |
1207 | while (tps32 <= scaled64 || scaled64 & 0xffffffff00000000ULL) { |
1208 | if (scaled64 & 0xffffffff00000000ULL || tps32 & 0x80000000) | |
5f4e3f88 ZA |
1209 | scaled64 >>= 1; |
1210 | else | |
1211 | tps32 <<= 1; | |
50d0a0f9 GH |
1212 | shift++; |
1213 | } | |
1214 | ||
5f4e3f88 ZA |
1215 | *pshift = shift; |
1216 | *pmultiplier = div_frac(scaled64, tps32); | |
50d0a0f9 | 1217 | |
5f4e3f88 ZA |
1218 | pr_debug("%s: base_khz %u => %u, shift %d, mul %u\n", |
1219 | __func__, base_khz, scaled_khz, shift, *pmultiplier); | |
50d0a0f9 GH |
1220 | } |
1221 | ||
d828199e | 1222 | #ifdef CONFIG_X86_64 |
16e8d74d | 1223 | static atomic_t kvm_guest_has_master_clock = ATOMIC_INIT(0); |
d828199e | 1224 | #endif |
16e8d74d | 1225 | |
c8076604 | 1226 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
69b0049a | 1227 | static unsigned long max_tsc_khz; |
c8076604 | 1228 | |
cc578287 | 1229 | static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec) |
8cfdc000 | 1230 | { |
cc578287 ZA |
1231 | return pvclock_scale_delta(nsec, vcpu->arch.virtual_tsc_mult, |
1232 | vcpu->arch.virtual_tsc_shift); | |
8cfdc000 ZA |
1233 | } |
1234 | ||
cc578287 | 1235 | static u32 adjust_tsc_khz(u32 khz, s32 ppm) |
1e993611 | 1236 | { |
cc578287 ZA |
1237 | u64 v = (u64)khz * (1000000 + ppm); |
1238 | do_div(v, 1000000); | |
1239 | return v; | |
1e993611 JR |
1240 | } |
1241 | ||
cc578287 | 1242 | static void kvm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 this_tsc_khz) |
759379dd | 1243 | { |
cc578287 ZA |
1244 | u32 thresh_lo, thresh_hi; |
1245 | int use_scaling = 0; | |
217fc9cf | 1246 | |
03ba32ca MT |
1247 | /* tsc_khz can be zero if TSC calibration fails */ |
1248 | if (this_tsc_khz == 0) | |
1249 | return; | |
1250 | ||
c285545f ZA |
1251 | /* Compute a scale to convert nanoseconds in TSC cycles */ |
1252 | kvm_get_time_scale(this_tsc_khz, NSEC_PER_SEC / 1000, | |
cc578287 ZA |
1253 | &vcpu->arch.virtual_tsc_shift, |
1254 | &vcpu->arch.virtual_tsc_mult); | |
1255 | vcpu->arch.virtual_tsc_khz = this_tsc_khz; | |
1256 | ||
1257 | /* | |
1258 | * Compute the variation in TSC rate which is acceptable | |
1259 | * within the range of tolerance and decide if the | |
1260 | * rate being applied is within that bounds of the hardware | |
1261 | * rate. If so, no scaling or compensation need be done. | |
1262 | */ | |
1263 | thresh_lo = adjust_tsc_khz(tsc_khz, -tsc_tolerance_ppm); | |
1264 | thresh_hi = adjust_tsc_khz(tsc_khz, tsc_tolerance_ppm); | |
1265 | if (this_tsc_khz < thresh_lo || this_tsc_khz > thresh_hi) { | |
1266 | pr_debug("kvm: requested TSC rate %u falls outside tolerance [%u,%u]\n", this_tsc_khz, thresh_lo, thresh_hi); | |
1267 | use_scaling = 1; | |
1268 | } | |
1269 | kvm_x86_ops->set_tsc_khz(vcpu, this_tsc_khz, use_scaling); | |
c285545f ZA |
1270 | } |
1271 | ||
1272 | static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns) | |
1273 | { | |
e26101b1 | 1274 | u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.this_tsc_nsec, |
cc578287 ZA |
1275 | vcpu->arch.virtual_tsc_mult, |
1276 | vcpu->arch.virtual_tsc_shift); | |
e26101b1 | 1277 | tsc += vcpu->arch.this_tsc_write; |
c285545f ZA |
1278 | return tsc; |
1279 | } | |
1280 | ||
69b0049a | 1281 | static void kvm_track_tsc_matching(struct kvm_vcpu *vcpu) |
b48aa97e MT |
1282 | { |
1283 | #ifdef CONFIG_X86_64 | |
1284 | bool vcpus_matched; | |
b48aa97e MT |
1285 | struct kvm_arch *ka = &vcpu->kvm->arch; |
1286 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1287 | ||
1288 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1289 | atomic_read(&vcpu->kvm->online_vcpus)); | |
1290 | ||
7f187922 MT |
1291 | /* |
1292 | * Once the masterclock is enabled, always perform request in | |
1293 | * order to update it. | |
1294 | * | |
1295 | * In order to enable masterclock, the host clocksource must be TSC | |
1296 | * and the vcpus need to have matched TSCs. When that happens, | |
1297 | * perform request to enable masterclock. | |
1298 | */ | |
1299 | if (ka->use_master_clock || | |
1300 | (gtod->clock.vclock_mode == VCLOCK_TSC && vcpus_matched)) | |
b48aa97e MT |
1301 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
1302 | ||
1303 | trace_kvm_track_tsc(vcpu->vcpu_id, ka->nr_vcpus_matched_tsc, | |
1304 | atomic_read(&vcpu->kvm->online_vcpus), | |
1305 | ka->use_master_clock, gtod->clock.vclock_mode); | |
1306 | #endif | |
1307 | } | |
1308 | ||
ba904635 WA |
1309 | static void update_ia32_tsc_adjust_msr(struct kvm_vcpu *vcpu, s64 offset) |
1310 | { | |
1311 | u64 curr_offset = kvm_x86_ops->read_tsc_offset(vcpu); | |
1312 | vcpu->arch.ia32_tsc_adjust_msr += offset - curr_offset; | |
1313 | } | |
1314 | ||
8fe8ab46 | 1315 | void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr) |
99e3e30a ZA |
1316 | { |
1317 | struct kvm *kvm = vcpu->kvm; | |
f38e098f | 1318 | u64 offset, ns, elapsed; |
99e3e30a | 1319 | unsigned long flags; |
02626b6a | 1320 | s64 usdiff; |
b48aa97e | 1321 | bool matched; |
0d3da0d2 | 1322 | bool already_matched; |
8fe8ab46 | 1323 | u64 data = msr->data; |
99e3e30a | 1324 | |
038f8c11 | 1325 | raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags); |
857e4099 | 1326 | offset = kvm_x86_ops->compute_tsc_offset(vcpu, data); |
759379dd | 1327 | ns = get_kernel_ns(); |
f38e098f | 1328 | elapsed = ns - kvm->arch.last_tsc_nsec; |
5d3cb0f6 | 1329 | |
03ba32ca | 1330 | if (vcpu->arch.virtual_tsc_khz) { |
8915aa27 MT |
1331 | int faulted = 0; |
1332 | ||
03ba32ca MT |
1333 | /* n.b - signed multiplication and division required */ |
1334 | usdiff = data - kvm->arch.last_tsc_write; | |
5d3cb0f6 | 1335 | #ifdef CONFIG_X86_64 |
03ba32ca | 1336 | usdiff = (usdiff * 1000) / vcpu->arch.virtual_tsc_khz; |
5d3cb0f6 | 1337 | #else |
03ba32ca | 1338 | /* do_div() only does unsigned */ |
8915aa27 MT |
1339 | asm("1: idivl %[divisor]\n" |
1340 | "2: xor %%edx, %%edx\n" | |
1341 | " movl $0, %[faulted]\n" | |
1342 | "3:\n" | |
1343 | ".section .fixup,\"ax\"\n" | |
1344 | "4: movl $1, %[faulted]\n" | |
1345 | " jmp 3b\n" | |
1346 | ".previous\n" | |
1347 | ||
1348 | _ASM_EXTABLE(1b, 4b) | |
1349 | ||
1350 | : "=A"(usdiff), [faulted] "=r" (faulted) | |
1351 | : "A"(usdiff * 1000), [divisor] "rm"(vcpu->arch.virtual_tsc_khz)); | |
1352 | ||
5d3cb0f6 | 1353 | #endif |
03ba32ca MT |
1354 | do_div(elapsed, 1000); |
1355 | usdiff -= elapsed; | |
1356 | if (usdiff < 0) | |
1357 | usdiff = -usdiff; | |
8915aa27 MT |
1358 | |
1359 | /* idivl overflow => difference is larger than USEC_PER_SEC */ | |
1360 | if (faulted) | |
1361 | usdiff = USEC_PER_SEC; | |
03ba32ca MT |
1362 | } else |
1363 | usdiff = USEC_PER_SEC; /* disable TSC match window below */ | |
f38e098f ZA |
1364 | |
1365 | /* | |
5d3cb0f6 ZA |
1366 | * Special case: TSC write with a small delta (1 second) of virtual |
1367 | * cycle time against real time is interpreted as an attempt to | |
1368 | * synchronize the CPU. | |
1369 | * | |
1370 | * For a reliable TSC, we can match TSC offsets, and for an unstable | |
1371 | * TSC, we add elapsed time in this computation. We could let the | |
1372 | * compensation code attempt to catch up if we fall behind, but | |
1373 | * it's better to try to match offsets from the beginning. | |
1374 | */ | |
02626b6a | 1375 | if (usdiff < USEC_PER_SEC && |
5d3cb0f6 | 1376 | vcpu->arch.virtual_tsc_khz == kvm->arch.last_tsc_khz) { |
f38e098f | 1377 | if (!check_tsc_unstable()) { |
e26101b1 | 1378 | offset = kvm->arch.cur_tsc_offset; |
f38e098f ZA |
1379 | pr_debug("kvm: matched tsc offset for %llu\n", data); |
1380 | } else { | |
857e4099 | 1381 | u64 delta = nsec_to_cycles(vcpu, elapsed); |
5d3cb0f6 ZA |
1382 | data += delta; |
1383 | offset = kvm_x86_ops->compute_tsc_offset(vcpu, data); | |
759379dd | 1384 | pr_debug("kvm: adjusted tsc offset by %llu\n", delta); |
f38e098f | 1385 | } |
b48aa97e | 1386 | matched = true; |
0d3da0d2 | 1387 | already_matched = (vcpu->arch.this_tsc_generation == kvm->arch.cur_tsc_generation); |
e26101b1 ZA |
1388 | } else { |
1389 | /* | |
1390 | * We split periods of matched TSC writes into generations. | |
1391 | * For each generation, we track the original measured | |
1392 | * nanosecond time, offset, and write, so if TSCs are in | |
1393 | * sync, we can match exact offset, and if not, we can match | |
4a969980 | 1394 | * exact software computation in compute_guest_tsc() |
e26101b1 ZA |
1395 | * |
1396 | * These values are tracked in kvm->arch.cur_xxx variables. | |
1397 | */ | |
1398 | kvm->arch.cur_tsc_generation++; | |
1399 | kvm->arch.cur_tsc_nsec = ns; | |
1400 | kvm->arch.cur_tsc_write = data; | |
1401 | kvm->arch.cur_tsc_offset = offset; | |
b48aa97e | 1402 | matched = false; |
0d3da0d2 | 1403 | pr_debug("kvm: new tsc generation %llu, clock %llu\n", |
e26101b1 | 1404 | kvm->arch.cur_tsc_generation, data); |
f38e098f | 1405 | } |
e26101b1 ZA |
1406 | |
1407 | /* | |
1408 | * We also track th most recent recorded KHZ, write and time to | |
1409 | * allow the matching interval to be extended at each write. | |
1410 | */ | |
f38e098f ZA |
1411 | kvm->arch.last_tsc_nsec = ns; |
1412 | kvm->arch.last_tsc_write = data; | |
5d3cb0f6 | 1413 | kvm->arch.last_tsc_khz = vcpu->arch.virtual_tsc_khz; |
99e3e30a | 1414 | |
b183aa58 | 1415 | vcpu->arch.last_guest_tsc = data; |
e26101b1 ZA |
1416 | |
1417 | /* Keep track of which generation this VCPU has synchronized to */ | |
1418 | vcpu->arch.this_tsc_generation = kvm->arch.cur_tsc_generation; | |
1419 | vcpu->arch.this_tsc_nsec = kvm->arch.cur_tsc_nsec; | |
1420 | vcpu->arch.this_tsc_write = kvm->arch.cur_tsc_write; | |
1421 | ||
ba904635 WA |
1422 | if (guest_cpuid_has_tsc_adjust(vcpu) && !msr->host_initiated) |
1423 | update_ia32_tsc_adjust_msr(vcpu, offset); | |
e26101b1 ZA |
1424 | kvm_x86_ops->write_tsc_offset(vcpu, offset); |
1425 | raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags); | |
b48aa97e MT |
1426 | |
1427 | spin_lock(&kvm->arch.pvclock_gtod_sync_lock); | |
0d3da0d2 | 1428 | if (!matched) { |
b48aa97e | 1429 | kvm->arch.nr_vcpus_matched_tsc = 0; |
0d3da0d2 TG |
1430 | } else if (!already_matched) { |
1431 | kvm->arch.nr_vcpus_matched_tsc++; | |
1432 | } | |
b48aa97e MT |
1433 | |
1434 | kvm_track_tsc_matching(vcpu); | |
1435 | spin_unlock(&kvm->arch.pvclock_gtod_sync_lock); | |
99e3e30a | 1436 | } |
e26101b1 | 1437 | |
99e3e30a ZA |
1438 | EXPORT_SYMBOL_GPL(kvm_write_tsc); |
1439 | ||
d828199e MT |
1440 | #ifdef CONFIG_X86_64 |
1441 | ||
1442 | static cycle_t read_tsc(void) | |
1443 | { | |
03b9730b AL |
1444 | cycle_t ret = (cycle_t)rdtsc_ordered(); |
1445 | u64 last = pvclock_gtod_data.clock.cycle_last; | |
d828199e MT |
1446 | |
1447 | if (likely(ret >= last)) | |
1448 | return ret; | |
1449 | ||
1450 | /* | |
1451 | * GCC likes to generate cmov here, but this branch is extremely | |
1452 | * predictable (it's just a funciton of time and the likely is | |
1453 | * very likely) and there's a data dependence, so force GCC | |
1454 | * to generate a branch instead. I don't barrier() because | |
1455 | * we don't actually need a barrier, and if this function | |
1456 | * ever gets inlined it will generate worse code. | |
1457 | */ | |
1458 | asm volatile (""); | |
1459 | return last; | |
1460 | } | |
1461 | ||
1462 | static inline u64 vgettsc(cycle_t *cycle_now) | |
1463 | { | |
1464 | long v; | |
1465 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1466 | ||
1467 | *cycle_now = read_tsc(); | |
1468 | ||
1469 | v = (*cycle_now - gtod->clock.cycle_last) & gtod->clock.mask; | |
1470 | return v * gtod->clock.mult; | |
1471 | } | |
1472 | ||
cbcf2dd3 | 1473 | static int do_monotonic_boot(s64 *t, cycle_t *cycle_now) |
d828199e | 1474 | { |
cbcf2dd3 | 1475 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; |
d828199e | 1476 | unsigned long seq; |
d828199e | 1477 | int mode; |
cbcf2dd3 | 1478 | u64 ns; |
d828199e | 1479 | |
d828199e MT |
1480 | do { |
1481 | seq = read_seqcount_begin(>od->seq); | |
1482 | mode = gtod->clock.vclock_mode; | |
cbcf2dd3 | 1483 | ns = gtod->nsec_base; |
d828199e MT |
1484 | ns += vgettsc(cycle_now); |
1485 | ns >>= gtod->clock.shift; | |
cbcf2dd3 | 1486 | ns += gtod->boot_ns; |
d828199e | 1487 | } while (unlikely(read_seqcount_retry(>od->seq, seq))); |
cbcf2dd3 | 1488 | *t = ns; |
d828199e MT |
1489 | |
1490 | return mode; | |
1491 | } | |
1492 | ||
1493 | /* returns true if host is using tsc clocksource */ | |
1494 | static bool kvm_get_time_and_clockread(s64 *kernel_ns, cycle_t *cycle_now) | |
1495 | { | |
d828199e MT |
1496 | /* checked again under seqlock below */ |
1497 | if (pvclock_gtod_data.clock.vclock_mode != VCLOCK_TSC) | |
1498 | return false; | |
1499 | ||
cbcf2dd3 | 1500 | return do_monotonic_boot(kernel_ns, cycle_now) == VCLOCK_TSC; |
d828199e MT |
1501 | } |
1502 | #endif | |
1503 | ||
1504 | /* | |
1505 | * | |
b48aa97e MT |
1506 | * Assuming a stable TSC across physical CPUS, and a stable TSC |
1507 | * across virtual CPUs, the following condition is possible. | |
1508 | * Each numbered line represents an event visible to both | |
d828199e MT |
1509 | * CPUs at the next numbered event. |
1510 | * | |
1511 | * "timespecX" represents host monotonic time. "tscX" represents | |
1512 | * RDTSC value. | |
1513 | * | |
1514 | * VCPU0 on CPU0 | VCPU1 on CPU1 | |
1515 | * | |
1516 | * 1. read timespec0,tsc0 | |
1517 | * 2. | timespec1 = timespec0 + N | |
1518 | * | tsc1 = tsc0 + M | |
1519 | * 3. transition to guest | transition to guest | |
1520 | * 4. ret0 = timespec0 + (rdtsc - tsc0) | | |
1521 | * 5. | ret1 = timespec1 + (rdtsc - tsc1) | |
1522 | * | ret1 = timespec0 + N + (rdtsc - (tsc0 + M)) | |
1523 | * | |
1524 | * Since ret0 update is visible to VCPU1 at time 5, to obey monotonicity: | |
1525 | * | |
1526 | * - ret0 < ret1 | |
1527 | * - timespec0 + (rdtsc - tsc0) < timespec0 + N + (rdtsc - (tsc0 + M)) | |
1528 | * ... | |
1529 | * - 0 < N - M => M < N | |
1530 | * | |
1531 | * That is, when timespec0 != timespec1, M < N. Unfortunately that is not | |
1532 | * always the case (the difference between two distinct xtime instances | |
1533 | * might be smaller then the difference between corresponding TSC reads, | |
1534 | * when updating guest vcpus pvclock areas). | |
1535 | * | |
1536 | * To avoid that problem, do not allow visibility of distinct | |
1537 | * system_timestamp/tsc_timestamp values simultaneously: use a master | |
1538 | * copy of host monotonic time values. Update that master copy | |
1539 | * in lockstep. | |
1540 | * | |
b48aa97e | 1541 | * Rely on synchronization of host TSCs and guest TSCs for monotonicity. |
d828199e MT |
1542 | * |
1543 | */ | |
1544 | ||
1545 | static void pvclock_update_vm_gtod_copy(struct kvm *kvm) | |
1546 | { | |
1547 | #ifdef CONFIG_X86_64 | |
1548 | struct kvm_arch *ka = &kvm->arch; | |
1549 | int vclock_mode; | |
b48aa97e MT |
1550 | bool host_tsc_clocksource, vcpus_matched; |
1551 | ||
1552 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1553 | atomic_read(&kvm->online_vcpus)); | |
d828199e MT |
1554 | |
1555 | /* | |
1556 | * If the host uses TSC clock, then passthrough TSC as stable | |
1557 | * to the guest. | |
1558 | */ | |
b48aa97e | 1559 | host_tsc_clocksource = kvm_get_time_and_clockread( |
d828199e MT |
1560 | &ka->master_kernel_ns, |
1561 | &ka->master_cycle_now); | |
1562 | ||
16a96021 | 1563 | ka->use_master_clock = host_tsc_clocksource && vcpus_matched |
54750f2c MT |
1564 | && !backwards_tsc_observed |
1565 | && !ka->boot_vcpu_runs_old_kvmclock; | |
b48aa97e | 1566 | |
d828199e MT |
1567 | if (ka->use_master_clock) |
1568 | atomic_set(&kvm_guest_has_master_clock, 1); | |
1569 | ||
1570 | vclock_mode = pvclock_gtod_data.clock.vclock_mode; | |
b48aa97e MT |
1571 | trace_kvm_update_master_clock(ka->use_master_clock, vclock_mode, |
1572 | vcpus_matched); | |
d828199e MT |
1573 | #endif |
1574 | } | |
1575 | ||
2e762ff7 MT |
1576 | static void kvm_gen_update_masterclock(struct kvm *kvm) |
1577 | { | |
1578 | #ifdef CONFIG_X86_64 | |
1579 | int i; | |
1580 | struct kvm_vcpu *vcpu; | |
1581 | struct kvm_arch *ka = &kvm->arch; | |
1582 | ||
1583 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
1584 | kvm_make_mclock_inprogress_request(kvm); | |
1585 | /* no guest entries from this point */ | |
1586 | pvclock_update_vm_gtod_copy(kvm); | |
1587 | ||
1588 | kvm_for_each_vcpu(i, vcpu, kvm) | |
105b21bb | 1589 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
2e762ff7 MT |
1590 | |
1591 | /* guest entries allowed */ | |
1592 | kvm_for_each_vcpu(i, vcpu, kvm) | |
1593 | clear_bit(KVM_REQ_MCLOCK_INPROGRESS, &vcpu->requests); | |
1594 | ||
1595 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
1596 | #endif | |
1597 | } | |
1598 | ||
34c238a1 | 1599 | static int kvm_guest_time_update(struct kvm_vcpu *v) |
18068523 | 1600 | { |
d828199e | 1601 | unsigned long flags, this_tsc_khz; |
18068523 | 1602 | struct kvm_vcpu_arch *vcpu = &v->arch; |
d828199e | 1603 | struct kvm_arch *ka = &v->kvm->arch; |
f25e656d | 1604 | s64 kernel_ns; |
d828199e | 1605 | u64 tsc_timestamp, host_tsc; |
0b79459b | 1606 | struct pvclock_vcpu_time_info guest_hv_clock; |
51d59c6b | 1607 | u8 pvclock_flags; |
d828199e MT |
1608 | bool use_master_clock; |
1609 | ||
1610 | kernel_ns = 0; | |
1611 | host_tsc = 0; | |
18068523 | 1612 | |
d828199e MT |
1613 | /* |
1614 | * If the host uses TSC clock, then passthrough TSC as stable | |
1615 | * to the guest. | |
1616 | */ | |
1617 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
1618 | use_master_clock = ka->use_master_clock; | |
1619 | if (use_master_clock) { | |
1620 | host_tsc = ka->master_cycle_now; | |
1621 | kernel_ns = ka->master_kernel_ns; | |
1622 | } | |
1623 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
c09664bb MT |
1624 | |
1625 | /* Keep irq disabled to prevent changes to the clock */ | |
1626 | local_irq_save(flags); | |
89cbc767 | 1627 | this_tsc_khz = __this_cpu_read(cpu_tsc_khz); |
c09664bb MT |
1628 | if (unlikely(this_tsc_khz == 0)) { |
1629 | local_irq_restore(flags); | |
1630 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); | |
1631 | return 1; | |
1632 | } | |
d828199e | 1633 | if (!use_master_clock) { |
4ea1636b | 1634 | host_tsc = rdtsc(); |
d828199e MT |
1635 | kernel_ns = get_kernel_ns(); |
1636 | } | |
1637 | ||
1638 | tsc_timestamp = kvm_x86_ops->read_l1_tsc(v, host_tsc); | |
1639 | ||
c285545f ZA |
1640 | /* |
1641 | * We may have to catch up the TSC to match elapsed wall clock | |
1642 | * time for two reasons, even if kvmclock is used. | |
1643 | * 1) CPU could have been running below the maximum TSC rate | |
1644 | * 2) Broken TSC compensation resets the base at each VCPU | |
1645 | * entry to avoid unknown leaps of TSC even when running | |
1646 | * again on the same CPU. This may cause apparent elapsed | |
1647 | * time to disappear, and the guest to stand still or run | |
1648 | * very slowly. | |
1649 | */ | |
1650 | if (vcpu->tsc_catchup) { | |
1651 | u64 tsc = compute_guest_tsc(v, kernel_ns); | |
1652 | if (tsc > tsc_timestamp) { | |
f1e2b260 | 1653 | adjust_tsc_offset_guest(v, tsc - tsc_timestamp); |
c285545f ZA |
1654 | tsc_timestamp = tsc; |
1655 | } | |
50d0a0f9 GH |
1656 | } |
1657 | ||
18068523 GOC |
1658 | local_irq_restore(flags); |
1659 | ||
0b79459b | 1660 | if (!vcpu->pv_time_enabled) |
c285545f | 1661 | return 0; |
18068523 | 1662 | |
e48672fa | 1663 | if (unlikely(vcpu->hw_tsc_khz != this_tsc_khz)) { |
5f4e3f88 ZA |
1664 | kvm_get_time_scale(NSEC_PER_SEC / 1000, this_tsc_khz, |
1665 | &vcpu->hv_clock.tsc_shift, | |
1666 | &vcpu->hv_clock.tsc_to_system_mul); | |
e48672fa | 1667 | vcpu->hw_tsc_khz = this_tsc_khz; |
8cfdc000 ZA |
1668 | } |
1669 | ||
1670 | /* With all the info we got, fill in the values */ | |
1d5f066e | 1671 | vcpu->hv_clock.tsc_timestamp = tsc_timestamp; |
759379dd | 1672 | vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset; |
28e4639a | 1673 | vcpu->last_guest_tsc = tsc_timestamp; |
51d59c6b | 1674 | |
09a0c3f1 OH |
1675 | if (unlikely(kvm_read_guest_cached(v->kvm, &vcpu->pv_time, |
1676 | &guest_hv_clock, sizeof(guest_hv_clock)))) | |
1677 | return 0; | |
1678 | ||
5dca0d91 RK |
1679 | /* This VCPU is paused, but it's legal for a guest to read another |
1680 | * VCPU's kvmclock, so we really have to follow the specification where | |
1681 | * it says that version is odd if data is being modified, and even after | |
1682 | * it is consistent. | |
1683 | * | |
1684 | * Version field updates must be kept separate. This is because | |
1685 | * kvm_write_guest_cached might use a "rep movs" instruction, and | |
1686 | * writes within a string instruction are weakly ordered. So there | |
1687 | * are three writes overall. | |
1688 | * | |
1689 | * As a small optimization, only write the version field in the first | |
1690 | * and third write. The vcpu->pv_time cache is still valid, because the | |
1691 | * version field is the first in the struct. | |
18068523 | 1692 | */ |
5dca0d91 RK |
1693 | BUILD_BUG_ON(offsetof(struct pvclock_vcpu_time_info, version) != 0); |
1694 | ||
1695 | vcpu->hv_clock.version = guest_hv_clock.version + 1; | |
1696 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, | |
1697 | &vcpu->hv_clock, | |
1698 | sizeof(vcpu->hv_clock.version)); | |
1699 | ||
1700 | smp_wmb(); | |
78c0337a MT |
1701 | |
1702 | /* retain PVCLOCK_GUEST_STOPPED if set in guest copy */ | |
0b79459b | 1703 | pvclock_flags = (guest_hv_clock.flags & PVCLOCK_GUEST_STOPPED); |
78c0337a MT |
1704 | |
1705 | if (vcpu->pvclock_set_guest_stopped_request) { | |
1706 | pvclock_flags |= PVCLOCK_GUEST_STOPPED; | |
1707 | vcpu->pvclock_set_guest_stopped_request = false; | |
1708 | } | |
1709 | ||
b7e60c5a MT |
1710 | pvclock_flags |= PVCLOCK_COUNTS_FROM_ZERO; |
1711 | ||
d828199e MT |
1712 | /* If the host uses TSC clocksource, then it is stable */ |
1713 | if (use_master_clock) | |
1714 | pvclock_flags |= PVCLOCK_TSC_STABLE_BIT; | |
1715 | ||
78c0337a MT |
1716 | vcpu->hv_clock.flags = pvclock_flags; |
1717 | ||
ce1a5e60 DM |
1718 | trace_kvm_pvclock_update(v->vcpu_id, &vcpu->hv_clock); |
1719 | ||
0b79459b AH |
1720 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
1721 | &vcpu->hv_clock, | |
1722 | sizeof(vcpu->hv_clock)); | |
5dca0d91 RK |
1723 | |
1724 | smp_wmb(); | |
1725 | ||
1726 | vcpu->hv_clock.version++; | |
1727 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, | |
1728 | &vcpu->hv_clock, | |
1729 | sizeof(vcpu->hv_clock.version)); | |
8cfdc000 | 1730 | return 0; |
c8076604 GH |
1731 | } |
1732 | ||
0061d53d MT |
1733 | /* |
1734 | * kvmclock updates which are isolated to a given vcpu, such as | |
1735 | * vcpu->cpu migration, should not allow system_timestamp from | |
1736 | * the rest of the vcpus to remain static. Otherwise ntp frequency | |
1737 | * correction applies to one vcpu's system_timestamp but not | |
1738 | * the others. | |
1739 | * | |
1740 | * So in those cases, request a kvmclock update for all vcpus. | |
7e44e449 AJ |
1741 | * We need to rate-limit these requests though, as they can |
1742 | * considerably slow guests that have a large number of vcpus. | |
1743 | * The time for a remote vcpu to update its kvmclock is bound | |
1744 | * by the delay we use to rate-limit the updates. | |
0061d53d MT |
1745 | */ |
1746 | ||
7e44e449 AJ |
1747 | #define KVMCLOCK_UPDATE_DELAY msecs_to_jiffies(100) |
1748 | ||
1749 | static void kvmclock_update_fn(struct work_struct *work) | |
0061d53d MT |
1750 | { |
1751 | int i; | |
7e44e449 AJ |
1752 | struct delayed_work *dwork = to_delayed_work(work); |
1753 | struct kvm_arch *ka = container_of(dwork, struct kvm_arch, | |
1754 | kvmclock_update_work); | |
1755 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
0061d53d MT |
1756 | struct kvm_vcpu *vcpu; |
1757 | ||
1758 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
105b21bb | 1759 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0061d53d MT |
1760 | kvm_vcpu_kick(vcpu); |
1761 | } | |
1762 | } | |
1763 | ||
7e44e449 AJ |
1764 | static void kvm_gen_kvmclock_update(struct kvm_vcpu *v) |
1765 | { | |
1766 | struct kvm *kvm = v->kvm; | |
1767 | ||
105b21bb | 1768 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); |
7e44e449 AJ |
1769 | schedule_delayed_work(&kvm->arch.kvmclock_update_work, |
1770 | KVMCLOCK_UPDATE_DELAY); | |
1771 | } | |
1772 | ||
332967a3 AJ |
1773 | #define KVMCLOCK_SYNC_PERIOD (300 * HZ) |
1774 | ||
1775 | static void kvmclock_sync_fn(struct work_struct *work) | |
1776 | { | |
1777 | struct delayed_work *dwork = to_delayed_work(work); | |
1778 | struct kvm_arch *ka = container_of(dwork, struct kvm_arch, | |
1779 | kvmclock_sync_work); | |
1780 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
1781 | ||
630994b3 MT |
1782 | if (!kvmclock_periodic_sync) |
1783 | return; | |
1784 | ||
332967a3 AJ |
1785 | schedule_delayed_work(&kvm->arch.kvmclock_update_work, 0); |
1786 | schedule_delayed_work(&kvm->arch.kvmclock_sync_work, | |
1787 | KVMCLOCK_SYNC_PERIOD); | |
1788 | } | |
1789 | ||
890ca9ae | 1790 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
15c4a640 | 1791 | { |
890ca9ae HY |
1792 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1793 | unsigned bank_num = mcg_cap & 0xff; | |
1794 | ||
15c4a640 | 1795 | switch (msr) { |
15c4a640 | 1796 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 1797 | vcpu->arch.mcg_status = data; |
15c4a640 | 1798 | break; |
c7ac679c | 1799 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1800 | if (!(mcg_cap & MCG_CTL_P)) |
1801 | return 1; | |
1802 | if (data != 0 && data != ~(u64)0) | |
1803 | return -1; | |
1804 | vcpu->arch.mcg_ctl = data; | |
1805 | break; | |
1806 | default: | |
1807 | if (msr >= MSR_IA32_MC0_CTL && | |
81760dcc | 1808 | msr < MSR_IA32_MCx_CTL(bank_num)) { |
890ca9ae | 1809 | u32 offset = msr - MSR_IA32_MC0_CTL; |
114be429 AP |
1810 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
1811 | * some Linux kernels though clear bit 10 in bank 4 to | |
1812 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore | |
1813 | * this to avoid an uncatched #GP in the guest | |
1814 | */ | |
890ca9ae | 1815 | if ((offset & 0x3) == 0 && |
114be429 | 1816 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
890ca9ae HY |
1817 | return -1; |
1818 | vcpu->arch.mce_banks[offset] = data; | |
1819 | break; | |
1820 | } | |
1821 | return 1; | |
1822 | } | |
1823 | return 0; | |
1824 | } | |
1825 | ||
ffde22ac ES |
1826 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
1827 | { | |
1828 | struct kvm *kvm = vcpu->kvm; | |
1829 | int lm = is_long_mode(vcpu); | |
1830 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
1831 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
1832 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
1833 | : kvm->arch.xen_hvm_config.blob_size_32; | |
1834 | u32 page_num = data & ~PAGE_MASK; | |
1835 | u64 page_addr = data & PAGE_MASK; | |
1836 | u8 *page; | |
1837 | int r; | |
1838 | ||
1839 | r = -E2BIG; | |
1840 | if (page_num >= blob_size) | |
1841 | goto out; | |
1842 | r = -ENOMEM; | |
ff5c2c03 SL |
1843 | page = memdup_user(blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE); |
1844 | if (IS_ERR(page)) { | |
1845 | r = PTR_ERR(page); | |
ffde22ac | 1846 | goto out; |
ff5c2c03 | 1847 | } |
54bf36aa | 1848 | if (kvm_vcpu_write_guest(vcpu, page_addr, page, PAGE_SIZE)) |
ffde22ac ES |
1849 | goto out_free; |
1850 | r = 0; | |
1851 | out_free: | |
1852 | kfree(page); | |
1853 | out: | |
1854 | return r; | |
1855 | } | |
1856 | ||
344d9588 GN |
1857 | static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data) |
1858 | { | |
1859 | gpa_t gpa = data & ~0x3f; | |
1860 | ||
4a969980 | 1861 | /* Bits 2:5 are reserved, Should be zero */ |
6adba527 | 1862 | if (data & 0x3c) |
344d9588 GN |
1863 | return 1; |
1864 | ||
1865 | vcpu->arch.apf.msr_val = data; | |
1866 | ||
1867 | if (!(data & KVM_ASYNC_PF_ENABLED)) { | |
1868 | kvm_clear_async_pf_completion_queue(vcpu); | |
1869 | kvm_async_pf_hash_reset(vcpu); | |
1870 | return 0; | |
1871 | } | |
1872 | ||
8f964525 AH |
1873 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.apf.data, gpa, |
1874 | sizeof(u32))) | |
344d9588 GN |
1875 | return 1; |
1876 | ||
6adba527 | 1877 | vcpu->arch.apf.send_user_only = !(data & KVM_ASYNC_PF_SEND_ALWAYS); |
344d9588 GN |
1878 | kvm_async_pf_wakeup_all(vcpu); |
1879 | return 0; | |
1880 | } | |
1881 | ||
12f9a48f GC |
1882 | static void kvmclock_reset(struct kvm_vcpu *vcpu) |
1883 | { | |
0b79459b | 1884 | vcpu->arch.pv_time_enabled = false; |
12f9a48f GC |
1885 | } |
1886 | ||
c9aaa895 GC |
1887 | static void accumulate_steal_time(struct kvm_vcpu *vcpu) |
1888 | { | |
1889 | u64 delta; | |
1890 | ||
1891 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
1892 | return; | |
1893 | ||
1894 | delta = current->sched_info.run_delay - vcpu->arch.st.last_steal; | |
1895 | vcpu->arch.st.last_steal = current->sched_info.run_delay; | |
1896 | vcpu->arch.st.accum_steal = delta; | |
1897 | } | |
1898 | ||
1899 | static void record_steal_time(struct kvm_vcpu *vcpu) | |
1900 | { | |
1901 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
1902 | return; | |
1903 | ||
1904 | if (unlikely(kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, | |
1905 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)))) | |
1906 | return; | |
1907 | ||
1908 | vcpu->arch.st.steal.steal += vcpu->arch.st.accum_steal; | |
1909 | vcpu->arch.st.steal.version += 2; | |
1910 | vcpu->arch.st.accum_steal = 0; | |
1911 | ||
1912 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, | |
1913 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); | |
1914 | } | |
1915 | ||
8fe8ab46 | 1916 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
15c4a640 | 1917 | { |
5753785f | 1918 | bool pr = false; |
8fe8ab46 WA |
1919 | u32 msr = msr_info->index; |
1920 | u64 data = msr_info->data; | |
5753785f | 1921 | |
15c4a640 | 1922 | switch (msr) { |
2e32b719 BP |
1923 | case MSR_AMD64_NB_CFG: |
1924 | case MSR_IA32_UCODE_REV: | |
1925 | case MSR_IA32_UCODE_WRITE: | |
1926 | case MSR_VM_HSAVE_PA: | |
1927 | case MSR_AMD64_PATCH_LOADER: | |
1928 | case MSR_AMD64_BU_CFG2: | |
1929 | break; | |
1930 | ||
15c4a640 | 1931 | case MSR_EFER: |
b69e8cae | 1932 | return set_efer(vcpu, data); |
8f1589d9 AP |
1933 | case MSR_K7_HWCR: |
1934 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
82494028 | 1935 | data &= ~(u64)0x100; /* ignore ignne emulation enable */ |
a223c313 | 1936 | data &= ~(u64)0x8; /* ignore TLB cache disable */ |
22d48b2d | 1937 | data &= ~(u64)0x40000; /* ignore Mc status write enable */ |
8f1589d9 | 1938 | if (data != 0) { |
a737f256 CD |
1939 | vcpu_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", |
1940 | data); | |
8f1589d9 AP |
1941 | return 1; |
1942 | } | |
15c4a640 | 1943 | break; |
f7c6d140 AP |
1944 | case MSR_FAM10H_MMIO_CONF_BASE: |
1945 | if (data != 0) { | |
a737f256 CD |
1946 | vcpu_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " |
1947 | "0x%llx\n", data); | |
f7c6d140 AP |
1948 | return 1; |
1949 | } | |
15c4a640 | 1950 | break; |
b5e2fec0 AG |
1951 | case MSR_IA32_DEBUGCTLMSR: |
1952 | if (!data) { | |
1953 | /* We support the non-activated case already */ | |
1954 | break; | |
1955 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
1956 | /* Values other than LBR and BTF are vendor-specific, | |
1957 | thus reserved and should throw a #GP */ | |
1958 | return 1; | |
1959 | } | |
a737f256 CD |
1960 | vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", |
1961 | __func__, data); | |
b5e2fec0 | 1962 | break; |
9ba075a6 | 1963 | case 0x200 ... 0x2ff: |
ff53604b | 1964 | return kvm_mtrr_set_msr(vcpu, msr, data); |
15c4a640 | 1965 | case MSR_IA32_APICBASE: |
58cb628d | 1966 | return kvm_set_apic_base(vcpu, msr_info); |
0105d1a5 GN |
1967 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1968 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
a3e06bbe LJ |
1969 | case MSR_IA32_TSCDEADLINE: |
1970 | kvm_set_lapic_tscdeadline_msr(vcpu, data); | |
1971 | break; | |
ba904635 WA |
1972 | case MSR_IA32_TSC_ADJUST: |
1973 | if (guest_cpuid_has_tsc_adjust(vcpu)) { | |
1974 | if (!msr_info->host_initiated) { | |
d913b904 | 1975 | s64 adj = data - vcpu->arch.ia32_tsc_adjust_msr; |
d7add054 | 1976 | adjust_tsc_offset_guest(vcpu, adj); |
ba904635 WA |
1977 | } |
1978 | vcpu->arch.ia32_tsc_adjust_msr = data; | |
1979 | } | |
1980 | break; | |
15c4a640 | 1981 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1982 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 1983 | break; |
64d60670 PB |
1984 | case MSR_IA32_SMBASE: |
1985 | if (!msr_info->host_initiated) | |
1986 | return 1; | |
1987 | vcpu->arch.smbase = data; | |
1988 | break; | |
11c6bffa | 1989 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
1990 | case MSR_KVM_WALL_CLOCK: |
1991 | vcpu->kvm->arch.wall_clock = data; | |
1992 | kvm_write_wall_clock(vcpu->kvm, data); | |
1993 | break; | |
11c6bffa | 1994 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 | 1995 | case MSR_KVM_SYSTEM_TIME: { |
0b79459b | 1996 | u64 gpa_offset; |
54750f2c MT |
1997 | struct kvm_arch *ka = &vcpu->kvm->arch; |
1998 | ||
12f9a48f | 1999 | kvmclock_reset(vcpu); |
18068523 | 2000 | |
54750f2c MT |
2001 | if (vcpu->vcpu_id == 0 && !msr_info->host_initiated) { |
2002 | bool tmp = (msr == MSR_KVM_SYSTEM_TIME); | |
2003 | ||
2004 | if (ka->boot_vcpu_runs_old_kvmclock != tmp) | |
2005 | set_bit(KVM_REQ_MASTERCLOCK_UPDATE, | |
2006 | &vcpu->requests); | |
2007 | ||
2008 | ka->boot_vcpu_runs_old_kvmclock = tmp; | |
b7e60c5a MT |
2009 | |
2010 | ka->kvmclock_offset = -get_kernel_ns(); | |
54750f2c MT |
2011 | } |
2012 | ||
18068523 | 2013 | vcpu->arch.time = data; |
0061d53d | 2014 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
18068523 GOC |
2015 | |
2016 | /* we verify if the enable bit is set... */ | |
2017 | if (!(data & 1)) | |
2018 | break; | |
2019 | ||
0b79459b | 2020 | gpa_offset = data & ~(PAGE_MASK | 1); |
18068523 | 2021 | |
0b79459b | 2022 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, |
8f964525 AH |
2023 | &vcpu->arch.pv_time, data & ~1ULL, |
2024 | sizeof(struct pvclock_vcpu_time_info))) | |
0b79459b AH |
2025 | vcpu->arch.pv_time_enabled = false; |
2026 | else | |
2027 | vcpu->arch.pv_time_enabled = true; | |
32cad84f | 2028 | |
18068523 GOC |
2029 | break; |
2030 | } | |
344d9588 GN |
2031 | case MSR_KVM_ASYNC_PF_EN: |
2032 | if (kvm_pv_enable_async_pf(vcpu, data)) | |
2033 | return 1; | |
2034 | break; | |
c9aaa895 GC |
2035 | case MSR_KVM_STEAL_TIME: |
2036 | ||
2037 | if (unlikely(!sched_info_on())) | |
2038 | return 1; | |
2039 | ||
2040 | if (data & KVM_STEAL_RESERVED_MASK) | |
2041 | return 1; | |
2042 | ||
2043 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.st.stime, | |
8f964525 AH |
2044 | data & KVM_STEAL_VALID_BITS, |
2045 | sizeof(struct kvm_steal_time))) | |
c9aaa895 GC |
2046 | return 1; |
2047 | ||
2048 | vcpu->arch.st.msr_val = data; | |
2049 | ||
2050 | if (!(data & KVM_MSR_ENABLED)) | |
2051 | break; | |
2052 | ||
2053 | vcpu->arch.st.last_steal = current->sched_info.run_delay; | |
2054 | ||
2055 | preempt_disable(); | |
2056 | accumulate_steal_time(vcpu); | |
2057 | preempt_enable(); | |
2058 | ||
2059 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); | |
2060 | ||
2061 | break; | |
ae7a2a3f MT |
2062 | case MSR_KVM_PV_EOI_EN: |
2063 | if (kvm_lapic_enable_pv_eoi(vcpu, data)) | |
2064 | return 1; | |
2065 | break; | |
c9aaa895 | 2066 | |
890ca9ae HY |
2067 | case MSR_IA32_MCG_CTL: |
2068 | case MSR_IA32_MCG_STATUS: | |
81760dcc | 2069 | case MSR_IA32_MC0_CTL ... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS) - 1: |
890ca9ae | 2070 | return set_msr_mce(vcpu, msr, data); |
71db6023 | 2071 | |
6912ac32 WH |
2072 | case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3: |
2073 | case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1: | |
2074 | pr = true; /* fall through */ | |
2075 | case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3: | |
2076 | case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1: | |
c6702c9d | 2077 | if (kvm_pmu_is_valid_msr(vcpu, msr)) |
afd80d85 | 2078 | return kvm_pmu_set_msr(vcpu, msr_info); |
5753785f GN |
2079 | |
2080 | if (pr || data != 0) | |
a737f256 CD |
2081 | vcpu_unimpl(vcpu, "disabled perfctr wrmsr: " |
2082 | "0x%x data 0x%llx\n", msr, data); | |
5753785f | 2083 | break; |
84e0cefa JS |
2084 | case MSR_K7_CLK_CTL: |
2085 | /* | |
2086 | * Ignore all writes to this no longer documented MSR. | |
2087 | * Writes are only relevant for old K7 processors, | |
2088 | * all pre-dating SVM, but a recommended workaround from | |
4a969980 | 2089 | * AMD for these chips. It is possible to specify the |
84e0cefa JS |
2090 | * affected processor models on the command line, hence |
2091 | * the need to ignore the workaround. | |
2092 | */ | |
2093 | break; | |
55cd8e5a | 2094 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
e7d9513b AS |
2095 | case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: |
2096 | case HV_X64_MSR_CRASH_CTL: | |
2097 | return kvm_hv_set_msr_common(vcpu, msr, data, | |
2098 | msr_info->host_initiated); | |
91c9c3ed | 2099 | case MSR_IA32_BBL_CR_CTL3: |
2100 | /* Drop writes to this legacy MSR -- see rdmsr | |
2101 | * counterpart for further detail. | |
2102 | */ | |
a737f256 | 2103 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", msr, data); |
91c9c3ed | 2104 | break; |
2b036c6b BO |
2105 | case MSR_AMD64_OSVW_ID_LENGTH: |
2106 | if (!guest_cpuid_has_osvw(vcpu)) | |
2107 | return 1; | |
2108 | vcpu->arch.osvw.length = data; | |
2109 | break; | |
2110 | case MSR_AMD64_OSVW_STATUS: | |
2111 | if (!guest_cpuid_has_osvw(vcpu)) | |
2112 | return 1; | |
2113 | vcpu->arch.osvw.status = data; | |
2114 | break; | |
15c4a640 | 2115 | default: |
ffde22ac ES |
2116 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
2117 | return xen_hvm_config(vcpu, data); | |
c6702c9d | 2118 | if (kvm_pmu_is_valid_msr(vcpu, msr)) |
afd80d85 | 2119 | return kvm_pmu_set_msr(vcpu, msr_info); |
ed85c068 | 2120 | if (!ignore_msrs) { |
a737f256 CD |
2121 | vcpu_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", |
2122 | msr, data); | |
ed85c068 AP |
2123 | return 1; |
2124 | } else { | |
a737f256 CD |
2125 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", |
2126 | msr, data); | |
ed85c068 AP |
2127 | break; |
2128 | } | |
15c4a640 CO |
2129 | } |
2130 | return 0; | |
2131 | } | |
2132 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
2133 | ||
2134 | ||
2135 | /* | |
2136 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
2137 | * Returns 0 on success, non-0 otherwise. | |
2138 | * Assumes vcpu_load() was already called. | |
2139 | */ | |
609e36d3 | 2140 | int kvm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
15c4a640 | 2141 | { |
609e36d3 | 2142 | return kvm_x86_ops->get_msr(vcpu, msr); |
15c4a640 | 2143 | } |
ff651cb6 | 2144 | EXPORT_SYMBOL_GPL(kvm_get_msr); |
15c4a640 | 2145 | |
890ca9ae | 2146 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
2147 | { |
2148 | u64 data; | |
890ca9ae HY |
2149 | u64 mcg_cap = vcpu->arch.mcg_cap; |
2150 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
2151 | |
2152 | switch (msr) { | |
15c4a640 CO |
2153 | case MSR_IA32_P5_MC_ADDR: |
2154 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
2155 | data = 0; |
2156 | break; | |
15c4a640 | 2157 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
2158 | data = vcpu->arch.mcg_cap; |
2159 | break; | |
c7ac679c | 2160 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
2161 | if (!(mcg_cap & MCG_CTL_P)) |
2162 | return 1; | |
2163 | data = vcpu->arch.mcg_ctl; | |
2164 | break; | |
2165 | case MSR_IA32_MCG_STATUS: | |
2166 | data = vcpu->arch.mcg_status; | |
2167 | break; | |
2168 | default: | |
2169 | if (msr >= MSR_IA32_MC0_CTL && | |
81760dcc | 2170 | msr < MSR_IA32_MCx_CTL(bank_num)) { |
890ca9ae HY |
2171 | u32 offset = msr - MSR_IA32_MC0_CTL; |
2172 | data = vcpu->arch.mce_banks[offset]; | |
2173 | break; | |
2174 | } | |
2175 | return 1; | |
2176 | } | |
2177 | *pdata = data; | |
2178 | return 0; | |
2179 | } | |
2180 | ||
609e36d3 | 2181 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
890ca9ae | 2182 | { |
609e36d3 | 2183 | switch (msr_info->index) { |
890ca9ae | 2184 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 2185 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
2186 | case MSR_IA32_DEBUGCTLMSR: |
2187 | case MSR_IA32_LASTBRANCHFROMIP: | |
2188 | case MSR_IA32_LASTBRANCHTOIP: | |
2189 | case MSR_IA32_LASTINTFROMIP: | |
2190 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd JSR |
2191 | case MSR_K8_SYSCFG: |
2192 | case MSR_K7_HWCR: | |
61a6bd67 | 2193 | case MSR_VM_HSAVE_PA: |
1fdbd48c | 2194 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 2195 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 2196 | case MSR_FAM10H_MMIO_CONF_BASE: |
2e32b719 | 2197 | case MSR_AMD64_BU_CFG2: |
609e36d3 | 2198 | msr_info->data = 0; |
15c4a640 | 2199 | break; |
6912ac32 WH |
2200 | case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3: |
2201 | case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3: | |
2202 | case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1: | |
2203 | case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1: | |
c6702c9d | 2204 | if (kvm_pmu_is_valid_msr(vcpu, msr_info->index)) |
609e36d3 PB |
2205 | return kvm_pmu_get_msr(vcpu, msr_info->index, &msr_info->data); |
2206 | msr_info->data = 0; | |
5753785f | 2207 | break; |
742bc670 | 2208 | case MSR_IA32_UCODE_REV: |
609e36d3 | 2209 | msr_info->data = 0x100000000ULL; |
742bc670 | 2210 | break; |
9ba075a6 | 2211 | case MSR_MTRRcap: |
9ba075a6 | 2212 | case 0x200 ... 0x2ff: |
ff53604b | 2213 | return kvm_mtrr_get_msr(vcpu, msr_info->index, &msr_info->data); |
15c4a640 | 2214 | case 0xcd: /* fsb frequency */ |
609e36d3 | 2215 | msr_info->data = 3; |
15c4a640 | 2216 | break; |
7b914098 JS |
2217 | /* |
2218 | * MSR_EBC_FREQUENCY_ID | |
2219 | * Conservative value valid for even the basic CPU models. | |
2220 | * Models 0,1: 000 in bits 23:21 indicating a bus speed of | |
2221 | * 100MHz, model 2 000 in bits 18:16 indicating 100MHz, | |
2222 | * and 266MHz for model 3, or 4. Set Core Clock | |
2223 | * Frequency to System Bus Frequency Ratio to 1 (bits | |
2224 | * 31:24) even though these are only valid for CPU | |
2225 | * models > 2, however guests may end up dividing or | |
2226 | * multiplying by zero otherwise. | |
2227 | */ | |
2228 | case MSR_EBC_FREQUENCY_ID: | |
609e36d3 | 2229 | msr_info->data = 1 << 24; |
7b914098 | 2230 | break; |
15c4a640 | 2231 | case MSR_IA32_APICBASE: |
609e36d3 | 2232 | msr_info->data = kvm_get_apic_base(vcpu); |
15c4a640 | 2233 | break; |
0105d1a5 | 2234 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
609e36d3 | 2235 | return kvm_x2apic_msr_read(vcpu, msr_info->index, &msr_info->data); |
0105d1a5 | 2236 | break; |
a3e06bbe | 2237 | case MSR_IA32_TSCDEADLINE: |
609e36d3 | 2238 | msr_info->data = kvm_get_lapic_tscdeadline_msr(vcpu); |
a3e06bbe | 2239 | break; |
ba904635 | 2240 | case MSR_IA32_TSC_ADJUST: |
609e36d3 | 2241 | msr_info->data = (u64)vcpu->arch.ia32_tsc_adjust_msr; |
ba904635 | 2242 | break; |
15c4a640 | 2243 | case MSR_IA32_MISC_ENABLE: |
609e36d3 | 2244 | msr_info->data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 2245 | break; |
64d60670 PB |
2246 | case MSR_IA32_SMBASE: |
2247 | if (!msr_info->host_initiated) | |
2248 | return 1; | |
2249 | msr_info->data = vcpu->arch.smbase; | |
15c4a640 | 2250 | break; |
847f0ad8 AG |
2251 | case MSR_IA32_PERF_STATUS: |
2252 | /* TSC increment by tick */ | |
609e36d3 | 2253 | msr_info->data = 1000ULL; |
847f0ad8 | 2254 | /* CPU multiplier */ |
b0996ae4 | 2255 | msr_info->data |= (((uint64_t)4ULL) << 40); |
847f0ad8 | 2256 | break; |
15c4a640 | 2257 | case MSR_EFER: |
609e36d3 | 2258 | msr_info->data = vcpu->arch.efer; |
15c4a640 | 2259 | break; |
18068523 | 2260 | case MSR_KVM_WALL_CLOCK: |
11c6bffa | 2261 | case MSR_KVM_WALL_CLOCK_NEW: |
609e36d3 | 2262 | msr_info->data = vcpu->kvm->arch.wall_clock; |
18068523 GOC |
2263 | break; |
2264 | case MSR_KVM_SYSTEM_TIME: | |
11c6bffa | 2265 | case MSR_KVM_SYSTEM_TIME_NEW: |
609e36d3 | 2266 | msr_info->data = vcpu->arch.time; |
18068523 | 2267 | break; |
344d9588 | 2268 | case MSR_KVM_ASYNC_PF_EN: |
609e36d3 | 2269 | msr_info->data = vcpu->arch.apf.msr_val; |
344d9588 | 2270 | break; |
c9aaa895 | 2271 | case MSR_KVM_STEAL_TIME: |
609e36d3 | 2272 | msr_info->data = vcpu->arch.st.msr_val; |
c9aaa895 | 2273 | break; |
1d92128f | 2274 | case MSR_KVM_PV_EOI_EN: |
609e36d3 | 2275 | msr_info->data = vcpu->arch.pv_eoi.msr_val; |
1d92128f | 2276 | break; |
890ca9ae HY |
2277 | case MSR_IA32_P5_MC_ADDR: |
2278 | case MSR_IA32_P5_MC_TYPE: | |
2279 | case MSR_IA32_MCG_CAP: | |
2280 | case MSR_IA32_MCG_CTL: | |
2281 | case MSR_IA32_MCG_STATUS: | |
81760dcc | 2282 | case MSR_IA32_MC0_CTL ... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS) - 1: |
609e36d3 | 2283 | return get_msr_mce(vcpu, msr_info->index, &msr_info->data); |
84e0cefa JS |
2284 | case MSR_K7_CLK_CTL: |
2285 | /* | |
2286 | * Provide expected ramp-up count for K7. All other | |
2287 | * are set to zero, indicating minimum divisors for | |
2288 | * every field. | |
2289 | * | |
2290 | * This prevents guest kernels on AMD host with CPU | |
2291 | * type 6, model 8 and higher from exploding due to | |
2292 | * the rdmsr failing. | |
2293 | */ | |
609e36d3 | 2294 | msr_info->data = 0x20000000; |
84e0cefa | 2295 | break; |
55cd8e5a | 2296 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
e7d9513b AS |
2297 | case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: |
2298 | case HV_X64_MSR_CRASH_CTL: | |
e83d5887 AS |
2299 | return kvm_hv_get_msr_common(vcpu, |
2300 | msr_info->index, &msr_info->data); | |
55cd8e5a | 2301 | break; |
91c9c3ed | 2302 | case MSR_IA32_BBL_CR_CTL3: |
2303 | /* This legacy MSR exists but isn't fully documented in current | |
2304 | * silicon. It is however accessed by winxp in very narrow | |
2305 | * scenarios where it sets bit #19, itself documented as | |
2306 | * a "reserved" bit. Best effort attempt to source coherent | |
2307 | * read data here should the balance of the register be | |
2308 | * interpreted by the guest: | |
2309 | * | |
2310 | * L2 cache control register 3: 64GB range, 256KB size, | |
2311 | * enabled, latency 0x1, configured | |
2312 | */ | |
609e36d3 | 2313 | msr_info->data = 0xbe702111; |
91c9c3ed | 2314 | break; |
2b036c6b BO |
2315 | case MSR_AMD64_OSVW_ID_LENGTH: |
2316 | if (!guest_cpuid_has_osvw(vcpu)) | |
2317 | return 1; | |
609e36d3 | 2318 | msr_info->data = vcpu->arch.osvw.length; |
2b036c6b BO |
2319 | break; |
2320 | case MSR_AMD64_OSVW_STATUS: | |
2321 | if (!guest_cpuid_has_osvw(vcpu)) | |
2322 | return 1; | |
609e36d3 | 2323 | msr_info->data = vcpu->arch.osvw.status; |
2b036c6b | 2324 | break; |
15c4a640 | 2325 | default: |
c6702c9d | 2326 | if (kvm_pmu_is_valid_msr(vcpu, msr_info->index)) |
609e36d3 | 2327 | return kvm_pmu_get_msr(vcpu, msr_info->index, &msr_info->data); |
ed85c068 | 2328 | if (!ignore_msrs) { |
609e36d3 | 2329 | vcpu_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr_info->index); |
ed85c068 AP |
2330 | return 1; |
2331 | } else { | |
609e36d3 PB |
2332 | vcpu_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr_info->index); |
2333 | msr_info->data = 0; | |
ed85c068 AP |
2334 | } |
2335 | break; | |
15c4a640 | 2336 | } |
15c4a640 CO |
2337 | return 0; |
2338 | } | |
2339 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
2340 | ||
313a3dc7 CO |
2341 | /* |
2342 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
2343 | * | |
2344 | * @return number of msrs set successfully. | |
2345 | */ | |
2346 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
2347 | struct kvm_msr_entry *entries, | |
2348 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2349 | unsigned index, u64 *data)) | |
2350 | { | |
f656ce01 | 2351 | int i, idx; |
313a3dc7 | 2352 | |
f656ce01 | 2353 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
313a3dc7 CO |
2354 | for (i = 0; i < msrs->nmsrs; ++i) |
2355 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2356 | break; | |
f656ce01 | 2357 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 2358 | |
313a3dc7 CO |
2359 | return i; |
2360 | } | |
2361 | ||
2362 | /* | |
2363 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2364 | * | |
2365 | * @return number of msrs set successfully. | |
2366 | */ | |
2367 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
2368 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2369 | unsigned index, u64 *data), | |
2370 | int writeback) | |
2371 | { | |
2372 | struct kvm_msrs msrs; | |
2373 | struct kvm_msr_entry *entries; | |
2374 | int r, n; | |
2375 | unsigned size; | |
2376 | ||
2377 | r = -EFAULT; | |
2378 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
2379 | goto out; | |
2380 | ||
2381 | r = -E2BIG; | |
2382 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2383 | goto out; | |
2384 | ||
313a3dc7 | 2385 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; |
ff5c2c03 SL |
2386 | entries = memdup_user(user_msrs->entries, size); |
2387 | if (IS_ERR(entries)) { | |
2388 | r = PTR_ERR(entries); | |
313a3dc7 | 2389 | goto out; |
ff5c2c03 | 2390 | } |
313a3dc7 CO |
2391 | |
2392 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
2393 | if (r < 0) | |
2394 | goto out_free; | |
2395 | ||
2396 | r = -EFAULT; | |
2397 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2398 | goto out_free; | |
2399 | ||
2400 | r = n; | |
2401 | ||
2402 | out_free: | |
7a73c028 | 2403 | kfree(entries); |
313a3dc7 CO |
2404 | out: |
2405 | return r; | |
2406 | } | |
2407 | ||
784aa3d7 | 2408 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
018d00d2 ZX |
2409 | { |
2410 | int r; | |
2411 | ||
2412 | switch (ext) { | |
2413 | case KVM_CAP_IRQCHIP: | |
2414 | case KVM_CAP_HLT: | |
2415 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 2416 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 2417 | case KVM_CAP_EXT_CPUID: |
9c15bb1d | 2418 | case KVM_CAP_EXT_EMUL_CPUID: |
c8076604 | 2419 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 2420 | case KVM_CAP_PIT: |
a28e4f5a | 2421 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 2422 | case KVM_CAP_MP_STATE: |
ed848624 | 2423 | case KVM_CAP_SYNC_MMU: |
a355c85c | 2424 | case KVM_CAP_USER_NMI: |
52d939a0 | 2425 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 2426 | case KVM_CAP_IRQ_INJECT_STATUS: |
d34e6b17 | 2427 | case KVM_CAP_IOEVENTFD: |
f848a5a8 | 2428 | case KVM_CAP_IOEVENTFD_NO_LENGTH: |
c5ff41ce | 2429 | case KVM_CAP_PIT2: |
e9f42757 | 2430 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 2431 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 2432 | case KVM_CAP_XEN_HVM: |
afbcf7ab | 2433 | case KVM_CAP_ADJUST_CLOCK: |
3cfc3092 | 2434 | case KVM_CAP_VCPU_EVENTS: |
55cd8e5a | 2435 | case KVM_CAP_HYPERV: |
10388a07 | 2436 | case KVM_CAP_HYPERV_VAPIC: |
c25bc163 | 2437 | case KVM_CAP_HYPERV_SPIN: |
ab9f4ecb | 2438 | case KVM_CAP_PCI_SEGMENT: |
a1efbe77 | 2439 | case KVM_CAP_DEBUGREGS: |
d2be1651 | 2440 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
2d5b5a66 | 2441 | case KVM_CAP_XSAVE: |
344d9588 | 2442 | case KVM_CAP_ASYNC_PF: |
92a1f12d | 2443 | case KVM_CAP_GET_TSC_KHZ: |
1c0b28c2 | 2444 | case KVM_CAP_KVMCLOCK_CTRL: |
4d8b81ab | 2445 | case KVM_CAP_READONLY_MEM: |
5f66b620 | 2446 | case KVM_CAP_HYPERV_TIME: |
100943c5 | 2447 | case KVM_CAP_IOAPIC_POLARITY_IGNORED: |
defcf51f | 2448 | case KVM_CAP_TSC_DEADLINE_TIMER: |
90de4a18 NA |
2449 | case KVM_CAP_ENABLE_CAP_VM: |
2450 | case KVM_CAP_DISABLE_QUIRKS: | |
d71ba788 | 2451 | case KVM_CAP_SET_BOOT_CPU_ID: |
2a5bab10 AW |
2452 | #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT |
2453 | case KVM_CAP_ASSIGN_DEV_IRQ: | |
2454 | case KVM_CAP_PCI_2_3: | |
2455 | #endif | |
018d00d2 ZX |
2456 | r = 1; |
2457 | break; | |
6d396b55 PB |
2458 | case KVM_CAP_X86_SMM: |
2459 | /* SMBASE is usually relocated above 1M on modern chipsets, | |
2460 | * and SMM handlers might indeed rely on 4G segment limits, | |
2461 | * so do not report SMM to be available if real mode is | |
2462 | * emulated via vm86 mode. Still, do not go to great lengths | |
2463 | * to avoid userspace's usage of the feature, because it is a | |
2464 | * fringe case that is not enabled except via specific settings | |
2465 | * of the module parameters. | |
2466 | */ | |
2467 | r = kvm_x86_ops->cpu_has_high_real_mode_segbase(); | |
2468 | break; | |
542472b5 LV |
2469 | case KVM_CAP_COALESCED_MMIO: |
2470 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
2471 | break; | |
774ead3a AK |
2472 | case KVM_CAP_VAPIC: |
2473 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
2474 | break; | |
f725230a | 2475 | case KVM_CAP_NR_VCPUS: |
8c3ba334 SL |
2476 | r = KVM_SOFT_MAX_VCPUS; |
2477 | break; | |
2478 | case KVM_CAP_MAX_VCPUS: | |
f725230a AK |
2479 | r = KVM_MAX_VCPUS; |
2480 | break; | |
a988b910 | 2481 | case KVM_CAP_NR_MEMSLOTS: |
bbacc0c1 | 2482 | r = KVM_USER_MEM_SLOTS; |
a988b910 | 2483 | break; |
a68a6a72 MT |
2484 | case KVM_CAP_PV_MMU: /* obsolete */ |
2485 | r = 0; | |
2f333bcb | 2486 | break; |
4cee4b72 | 2487 | #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT |
62c476c7 | 2488 | case KVM_CAP_IOMMU: |
a1b60c1c | 2489 | r = iommu_present(&pci_bus_type); |
62c476c7 | 2490 | break; |
4cee4b72 | 2491 | #endif |
890ca9ae HY |
2492 | case KVM_CAP_MCE: |
2493 | r = KVM_MAX_MCE_BANKS; | |
2494 | break; | |
2d5b5a66 SY |
2495 | case KVM_CAP_XCRS: |
2496 | r = cpu_has_xsave; | |
2497 | break; | |
92a1f12d JR |
2498 | case KVM_CAP_TSC_CONTROL: |
2499 | r = kvm_has_tsc_control; | |
2500 | break; | |
018d00d2 ZX |
2501 | default: |
2502 | r = 0; | |
2503 | break; | |
2504 | } | |
2505 | return r; | |
2506 | ||
2507 | } | |
2508 | ||
043405e1 CO |
2509 | long kvm_arch_dev_ioctl(struct file *filp, |
2510 | unsigned int ioctl, unsigned long arg) | |
2511 | { | |
2512 | void __user *argp = (void __user *)arg; | |
2513 | long r; | |
2514 | ||
2515 | switch (ioctl) { | |
2516 | case KVM_GET_MSR_INDEX_LIST: { | |
2517 | struct kvm_msr_list __user *user_msr_list = argp; | |
2518 | struct kvm_msr_list msr_list; | |
2519 | unsigned n; | |
2520 | ||
2521 | r = -EFAULT; | |
2522 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
2523 | goto out; | |
2524 | n = msr_list.nmsrs; | |
62ef68bb | 2525 | msr_list.nmsrs = num_msrs_to_save + num_emulated_msrs; |
043405e1 CO |
2526 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
2527 | goto out; | |
2528 | r = -E2BIG; | |
e125e7b6 | 2529 | if (n < msr_list.nmsrs) |
043405e1 CO |
2530 | goto out; |
2531 | r = -EFAULT; | |
2532 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
2533 | num_msrs_to_save * sizeof(u32))) | |
2534 | goto out; | |
e125e7b6 | 2535 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 | 2536 | &emulated_msrs, |
62ef68bb | 2537 | num_emulated_msrs * sizeof(u32))) |
043405e1 CO |
2538 | goto out; |
2539 | r = 0; | |
2540 | break; | |
2541 | } | |
9c15bb1d BP |
2542 | case KVM_GET_SUPPORTED_CPUID: |
2543 | case KVM_GET_EMULATED_CPUID: { | |
674eea0f AK |
2544 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
2545 | struct kvm_cpuid2 cpuid; | |
2546 | ||
2547 | r = -EFAULT; | |
2548 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2549 | goto out; | |
9c15bb1d BP |
2550 | |
2551 | r = kvm_dev_ioctl_get_cpuid(&cpuid, cpuid_arg->entries, | |
2552 | ioctl); | |
674eea0f AK |
2553 | if (r) |
2554 | goto out; | |
2555 | ||
2556 | r = -EFAULT; | |
2557 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2558 | goto out; | |
2559 | r = 0; | |
2560 | break; | |
2561 | } | |
890ca9ae HY |
2562 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
2563 | u64 mce_cap; | |
2564 | ||
2565 | mce_cap = KVM_MCE_CAP_SUPPORTED; | |
2566 | r = -EFAULT; | |
2567 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) | |
2568 | goto out; | |
2569 | r = 0; | |
2570 | break; | |
2571 | } | |
043405e1 CO |
2572 | default: |
2573 | r = -EINVAL; | |
2574 | } | |
2575 | out: | |
2576 | return r; | |
2577 | } | |
2578 | ||
f5f48ee1 SY |
2579 | static void wbinvd_ipi(void *garbage) |
2580 | { | |
2581 | wbinvd(); | |
2582 | } | |
2583 | ||
2584 | static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
2585 | { | |
e0f0bbc5 | 2586 | return kvm_arch_has_noncoherent_dma(vcpu->kvm); |
f5f48ee1 SY |
2587 | } |
2588 | ||
313a3dc7 CO |
2589 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
2590 | { | |
f5f48ee1 SY |
2591 | /* Address WBINVD may be executed by guest */ |
2592 | if (need_emulate_wbinvd(vcpu)) { | |
2593 | if (kvm_x86_ops->has_wbinvd_exit()) | |
2594 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
2595 | else if (vcpu->cpu != -1 && vcpu->cpu != cpu) | |
2596 | smp_call_function_single(vcpu->cpu, | |
2597 | wbinvd_ipi, NULL, 1); | |
2598 | } | |
2599 | ||
313a3dc7 | 2600 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
8f6055cb | 2601 | |
0dd6a6ed ZA |
2602 | /* Apply any externally detected TSC adjustments (due to suspend) */ |
2603 | if (unlikely(vcpu->arch.tsc_offset_adjustment)) { | |
2604 | adjust_tsc_offset_host(vcpu, vcpu->arch.tsc_offset_adjustment); | |
2605 | vcpu->arch.tsc_offset_adjustment = 0; | |
105b21bb | 2606 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0dd6a6ed | 2607 | } |
8f6055cb | 2608 | |
48434c20 | 2609 | if (unlikely(vcpu->cpu != cpu) || check_tsc_unstable()) { |
6f526ec5 | 2610 | s64 tsc_delta = !vcpu->arch.last_host_tsc ? 0 : |
4ea1636b | 2611 | rdtsc() - vcpu->arch.last_host_tsc; |
e48672fa ZA |
2612 | if (tsc_delta < 0) |
2613 | mark_tsc_unstable("KVM discovered backwards TSC"); | |
c285545f | 2614 | if (check_tsc_unstable()) { |
b183aa58 ZA |
2615 | u64 offset = kvm_x86_ops->compute_tsc_offset(vcpu, |
2616 | vcpu->arch.last_guest_tsc); | |
2617 | kvm_x86_ops->write_tsc_offset(vcpu, offset); | |
c285545f | 2618 | vcpu->arch.tsc_catchup = 1; |
c285545f | 2619 | } |
d98d07ca MT |
2620 | /* |
2621 | * On a host with synchronized TSC, there is no need to update | |
2622 | * kvmclock on vcpu->cpu migration | |
2623 | */ | |
2624 | if (!vcpu->kvm->arch.use_master_clock || vcpu->cpu == -1) | |
0061d53d | 2625 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
c285545f ZA |
2626 | if (vcpu->cpu != cpu) |
2627 | kvm_migrate_timers(vcpu); | |
e48672fa | 2628 | vcpu->cpu = cpu; |
6b7d7e76 | 2629 | } |
c9aaa895 GC |
2630 | |
2631 | accumulate_steal_time(vcpu); | |
2632 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); | |
313a3dc7 CO |
2633 | } |
2634 | ||
2635 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
2636 | { | |
02daab21 | 2637 | kvm_x86_ops->vcpu_put(vcpu); |
1c11e713 | 2638 | kvm_put_guest_fpu(vcpu); |
4ea1636b | 2639 | vcpu->arch.last_host_tsc = rdtsc(); |
313a3dc7 CO |
2640 | } |
2641 | ||
313a3dc7 CO |
2642 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
2643 | struct kvm_lapic_state *s) | |
2644 | { | |
5a71785d | 2645 | kvm_x86_ops->sync_pir_to_irr(vcpu); |
ad312c7c | 2646 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
2647 | |
2648 | return 0; | |
2649 | } | |
2650 | ||
2651 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
2652 | struct kvm_lapic_state *s) | |
2653 | { | |
64eb0620 | 2654 | kvm_apic_post_state_restore(vcpu, s); |
cb142eb7 | 2655 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
2656 | |
2657 | return 0; | |
2658 | } | |
2659 | ||
f77bc6a4 ZX |
2660 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2661 | struct kvm_interrupt *irq) | |
2662 | { | |
02cdb50f | 2663 | if (irq->irq >= KVM_NR_INTERRUPTS) |
f77bc6a4 ZX |
2664 | return -EINVAL; |
2665 | if (irqchip_in_kernel(vcpu->kvm)) | |
2666 | return -ENXIO; | |
f77bc6a4 | 2667 | |
66fd3f7f | 2668 | kvm_queue_interrupt(vcpu, irq->irq, false); |
3842d135 | 2669 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f77bc6a4 | 2670 | |
f77bc6a4 ZX |
2671 | return 0; |
2672 | } | |
2673 | ||
c4abb7c9 JK |
2674 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
2675 | { | |
c4abb7c9 | 2676 | kvm_inject_nmi(vcpu); |
c4abb7c9 JK |
2677 | |
2678 | return 0; | |
2679 | } | |
2680 | ||
f077825a PB |
2681 | static int kvm_vcpu_ioctl_smi(struct kvm_vcpu *vcpu) |
2682 | { | |
64d60670 PB |
2683 | kvm_make_request(KVM_REQ_SMI, vcpu); |
2684 | ||
f077825a PB |
2685 | return 0; |
2686 | } | |
2687 | ||
b209749f AK |
2688 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
2689 | struct kvm_tpr_access_ctl *tac) | |
2690 | { | |
2691 | if (tac->flags) | |
2692 | return -EINVAL; | |
2693 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
2694 | return 0; | |
2695 | } | |
2696 | ||
890ca9ae HY |
2697 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
2698 | u64 mcg_cap) | |
2699 | { | |
2700 | int r; | |
2701 | unsigned bank_num = mcg_cap & 0xff, bank; | |
2702 | ||
2703 | r = -EINVAL; | |
a9e38c3e | 2704 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae HY |
2705 | goto out; |
2706 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) | |
2707 | goto out; | |
2708 | r = 0; | |
2709 | vcpu->arch.mcg_cap = mcg_cap; | |
2710 | /* Init IA32_MCG_CTL to all 1s */ | |
2711 | if (mcg_cap & MCG_CTL_P) | |
2712 | vcpu->arch.mcg_ctl = ~(u64)0; | |
2713 | /* Init IA32_MCi_CTL to all 1s */ | |
2714 | for (bank = 0; bank < bank_num; bank++) | |
2715 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
2716 | out: | |
2717 | return r; | |
2718 | } | |
2719 | ||
2720 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
2721 | struct kvm_x86_mce *mce) | |
2722 | { | |
2723 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
2724 | unsigned bank_num = mcg_cap & 0xff; | |
2725 | u64 *banks = vcpu->arch.mce_banks; | |
2726 | ||
2727 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
2728 | return -EINVAL; | |
2729 | /* | |
2730 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
2731 | * reporting is disabled | |
2732 | */ | |
2733 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
2734 | vcpu->arch.mcg_ctl != ~(u64)0) | |
2735 | return 0; | |
2736 | banks += 4 * mce->bank; | |
2737 | /* | |
2738 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
2739 | * reporting is disabled for the bank | |
2740 | */ | |
2741 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
2742 | return 0; | |
2743 | if (mce->status & MCI_STATUS_UC) { | |
2744 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 2745 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
a8eeb04a | 2746 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
890ca9ae HY |
2747 | return 0; |
2748 | } | |
2749 | if (banks[1] & MCI_STATUS_VAL) | |
2750 | mce->status |= MCI_STATUS_OVER; | |
2751 | banks[2] = mce->addr; | |
2752 | banks[3] = mce->misc; | |
2753 | vcpu->arch.mcg_status = mce->mcg_status; | |
2754 | banks[1] = mce->status; | |
2755 | kvm_queue_exception(vcpu, MC_VECTOR); | |
2756 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
2757 | || !(banks[1] & MCI_STATUS_UC)) { | |
2758 | if (banks[1] & MCI_STATUS_VAL) | |
2759 | mce->status |= MCI_STATUS_OVER; | |
2760 | banks[2] = mce->addr; | |
2761 | banks[3] = mce->misc; | |
2762 | banks[1] = mce->status; | |
2763 | } else | |
2764 | banks[1] |= MCI_STATUS_OVER; | |
2765 | return 0; | |
2766 | } | |
2767 | ||
3cfc3092 JK |
2768 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
2769 | struct kvm_vcpu_events *events) | |
2770 | { | |
7460fb4a | 2771 | process_nmi(vcpu); |
03b82a30 JK |
2772 | events->exception.injected = |
2773 | vcpu->arch.exception.pending && | |
2774 | !kvm_exception_is_soft(vcpu->arch.exception.nr); | |
3cfc3092 JK |
2775 | events->exception.nr = vcpu->arch.exception.nr; |
2776 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
97e69aa6 | 2777 | events->exception.pad = 0; |
3cfc3092 JK |
2778 | events->exception.error_code = vcpu->arch.exception.error_code; |
2779 | ||
03b82a30 JK |
2780 | events->interrupt.injected = |
2781 | vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft; | |
3cfc3092 | 2782 | events->interrupt.nr = vcpu->arch.interrupt.nr; |
03b82a30 | 2783 | events->interrupt.soft = 0; |
37ccdcbe | 2784 | events->interrupt.shadow = kvm_x86_ops->get_interrupt_shadow(vcpu); |
3cfc3092 JK |
2785 | |
2786 | events->nmi.injected = vcpu->arch.nmi_injected; | |
7460fb4a | 2787 | events->nmi.pending = vcpu->arch.nmi_pending != 0; |
3cfc3092 | 2788 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); |
97e69aa6 | 2789 | events->nmi.pad = 0; |
3cfc3092 | 2790 | |
66450a21 | 2791 | events->sipi_vector = 0; /* never valid when reporting to user space */ |
3cfc3092 | 2792 | |
f077825a PB |
2793 | events->smi.smm = is_smm(vcpu); |
2794 | events->smi.pending = vcpu->arch.smi_pending; | |
2795 | events->smi.smm_inside_nmi = | |
2796 | !!(vcpu->arch.hflags & HF_SMM_INSIDE_NMI_MASK); | |
2797 | events->smi.latched_init = kvm_lapic_latched_init(vcpu); | |
2798 | ||
dab4b911 | 2799 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
f077825a PB |
2800 | | KVM_VCPUEVENT_VALID_SHADOW |
2801 | | KVM_VCPUEVENT_VALID_SMM); | |
97e69aa6 | 2802 | memset(&events->reserved, 0, sizeof(events->reserved)); |
3cfc3092 JK |
2803 | } |
2804 | ||
2805 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, | |
2806 | struct kvm_vcpu_events *events) | |
2807 | { | |
dab4b911 | 2808 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 | 2809 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
f077825a PB |
2810 | | KVM_VCPUEVENT_VALID_SHADOW |
2811 | | KVM_VCPUEVENT_VALID_SMM)) | |
3cfc3092 JK |
2812 | return -EINVAL; |
2813 | ||
7460fb4a | 2814 | process_nmi(vcpu); |
3cfc3092 JK |
2815 | vcpu->arch.exception.pending = events->exception.injected; |
2816 | vcpu->arch.exception.nr = events->exception.nr; | |
2817 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
2818 | vcpu->arch.exception.error_code = events->exception.error_code; | |
2819 | ||
2820 | vcpu->arch.interrupt.pending = events->interrupt.injected; | |
2821 | vcpu->arch.interrupt.nr = events->interrupt.nr; | |
2822 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
48005f64 JK |
2823 | if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) |
2824 | kvm_x86_ops->set_interrupt_shadow(vcpu, | |
2825 | events->interrupt.shadow); | |
3cfc3092 JK |
2826 | |
2827 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
2828 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
2829 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
2830 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
2831 | ||
66450a21 JK |
2832 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR && |
2833 | kvm_vcpu_has_lapic(vcpu)) | |
2834 | vcpu->arch.apic->sipi_vector = events->sipi_vector; | |
3cfc3092 | 2835 | |
f077825a PB |
2836 | if (events->flags & KVM_VCPUEVENT_VALID_SMM) { |
2837 | if (events->smi.smm) | |
2838 | vcpu->arch.hflags |= HF_SMM_MASK; | |
2839 | else | |
2840 | vcpu->arch.hflags &= ~HF_SMM_MASK; | |
2841 | vcpu->arch.smi_pending = events->smi.pending; | |
2842 | if (events->smi.smm_inside_nmi) | |
2843 | vcpu->arch.hflags |= HF_SMM_INSIDE_NMI_MASK; | |
2844 | else | |
2845 | vcpu->arch.hflags &= ~HF_SMM_INSIDE_NMI_MASK; | |
2846 | if (kvm_vcpu_has_lapic(vcpu)) { | |
2847 | if (events->smi.latched_init) | |
2848 | set_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); | |
2849 | else | |
2850 | clear_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); | |
2851 | } | |
2852 | } | |
2853 | ||
3842d135 AK |
2854 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
2855 | ||
3cfc3092 JK |
2856 | return 0; |
2857 | } | |
2858 | ||
a1efbe77 JK |
2859 | static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, |
2860 | struct kvm_debugregs *dbgregs) | |
2861 | { | |
73aaf249 JK |
2862 | unsigned long val; |
2863 | ||
a1efbe77 | 2864 | memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db)); |
16f8a6f9 | 2865 | kvm_get_dr(vcpu, 6, &val); |
73aaf249 | 2866 | dbgregs->dr6 = val; |
a1efbe77 JK |
2867 | dbgregs->dr7 = vcpu->arch.dr7; |
2868 | dbgregs->flags = 0; | |
97e69aa6 | 2869 | memset(&dbgregs->reserved, 0, sizeof(dbgregs->reserved)); |
a1efbe77 JK |
2870 | } |
2871 | ||
2872 | static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, | |
2873 | struct kvm_debugregs *dbgregs) | |
2874 | { | |
2875 | if (dbgregs->flags) | |
2876 | return -EINVAL; | |
2877 | ||
a1efbe77 | 2878 | memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db)); |
ae561ede | 2879 | kvm_update_dr0123(vcpu); |
a1efbe77 | 2880 | vcpu->arch.dr6 = dbgregs->dr6; |
73aaf249 | 2881 | kvm_update_dr6(vcpu); |
a1efbe77 | 2882 | vcpu->arch.dr7 = dbgregs->dr7; |
9926c9fd | 2883 | kvm_update_dr7(vcpu); |
a1efbe77 | 2884 | |
a1efbe77 JK |
2885 | return 0; |
2886 | } | |
2887 | ||
df1daba7 PB |
2888 | #define XSTATE_COMPACTION_ENABLED (1ULL << 63) |
2889 | ||
2890 | static void fill_xsave(u8 *dest, struct kvm_vcpu *vcpu) | |
2891 | { | |
c47ada30 | 2892 | struct xregs_state *xsave = &vcpu->arch.guest_fpu.state.xsave; |
400e4b20 | 2893 | u64 xstate_bv = xsave->header.xfeatures; |
df1daba7 PB |
2894 | u64 valid; |
2895 | ||
2896 | /* | |
2897 | * Copy legacy XSAVE area, to avoid complications with CPUID | |
2898 | * leaves 0 and 1 in the loop below. | |
2899 | */ | |
2900 | memcpy(dest, xsave, XSAVE_HDR_OFFSET); | |
2901 | ||
2902 | /* Set XSTATE_BV */ | |
2903 | *(u64 *)(dest + XSAVE_HDR_OFFSET) = xstate_bv; | |
2904 | ||
2905 | /* | |
2906 | * Copy each region from the possibly compacted offset to the | |
2907 | * non-compacted offset. | |
2908 | */ | |
2909 | valid = xstate_bv & ~XSTATE_FPSSE; | |
2910 | while (valid) { | |
2911 | u64 feature = valid & -valid; | |
2912 | int index = fls64(feature) - 1; | |
2913 | void *src = get_xsave_addr(xsave, feature); | |
2914 | ||
2915 | if (src) { | |
2916 | u32 size, offset, ecx, edx; | |
2917 | cpuid_count(XSTATE_CPUID, index, | |
2918 | &size, &offset, &ecx, &edx); | |
2919 | memcpy(dest + offset, src, size); | |
2920 | } | |
2921 | ||
2922 | valid -= feature; | |
2923 | } | |
2924 | } | |
2925 | ||
2926 | static void load_xsave(struct kvm_vcpu *vcpu, u8 *src) | |
2927 | { | |
c47ada30 | 2928 | struct xregs_state *xsave = &vcpu->arch.guest_fpu.state.xsave; |
df1daba7 PB |
2929 | u64 xstate_bv = *(u64 *)(src + XSAVE_HDR_OFFSET); |
2930 | u64 valid; | |
2931 | ||
2932 | /* | |
2933 | * Copy legacy XSAVE area, to avoid complications with CPUID | |
2934 | * leaves 0 and 1 in the loop below. | |
2935 | */ | |
2936 | memcpy(xsave, src, XSAVE_HDR_OFFSET); | |
2937 | ||
2938 | /* Set XSTATE_BV and possibly XCOMP_BV. */ | |
400e4b20 | 2939 | xsave->header.xfeatures = xstate_bv; |
df1daba7 | 2940 | if (cpu_has_xsaves) |
3a54450b | 2941 | xsave->header.xcomp_bv = host_xcr0 | XSTATE_COMPACTION_ENABLED; |
df1daba7 PB |
2942 | |
2943 | /* | |
2944 | * Copy each region from the non-compacted offset to the | |
2945 | * possibly compacted offset. | |
2946 | */ | |
2947 | valid = xstate_bv & ~XSTATE_FPSSE; | |
2948 | while (valid) { | |
2949 | u64 feature = valid & -valid; | |
2950 | int index = fls64(feature) - 1; | |
2951 | void *dest = get_xsave_addr(xsave, feature); | |
2952 | ||
2953 | if (dest) { | |
2954 | u32 size, offset, ecx, edx; | |
2955 | cpuid_count(XSTATE_CPUID, index, | |
2956 | &size, &offset, &ecx, &edx); | |
2957 | memcpy(dest, src + offset, size); | |
ee4100da | 2958 | } |
df1daba7 PB |
2959 | |
2960 | valid -= feature; | |
2961 | } | |
2962 | } | |
2963 | ||
2d5b5a66 SY |
2964 | static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu, |
2965 | struct kvm_xsave *guest_xsave) | |
2966 | { | |
4344ee98 | 2967 | if (cpu_has_xsave) { |
df1daba7 PB |
2968 | memset(guest_xsave, 0, sizeof(struct kvm_xsave)); |
2969 | fill_xsave((u8 *) guest_xsave->region, vcpu); | |
4344ee98 | 2970 | } else { |
2d5b5a66 | 2971 | memcpy(guest_xsave->region, |
7366ed77 | 2972 | &vcpu->arch.guest_fpu.state.fxsave, |
c47ada30 | 2973 | sizeof(struct fxregs_state)); |
2d5b5a66 SY |
2974 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] = |
2975 | XSTATE_FPSSE; | |
2976 | } | |
2977 | } | |
2978 | ||
2979 | static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu, | |
2980 | struct kvm_xsave *guest_xsave) | |
2981 | { | |
2982 | u64 xstate_bv = | |
2983 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)]; | |
2984 | ||
d7876f1b PB |
2985 | if (cpu_has_xsave) { |
2986 | /* | |
2987 | * Here we allow setting states that are not present in | |
2988 | * CPUID leaf 0xD, index 0, EDX:EAX. This is for compatibility | |
2989 | * with old userspace. | |
2990 | */ | |
4ff41732 | 2991 | if (xstate_bv & ~kvm_supported_xcr0()) |
d7876f1b | 2992 | return -EINVAL; |
df1daba7 | 2993 | load_xsave(vcpu, (u8 *)guest_xsave->region); |
d7876f1b | 2994 | } else { |
2d5b5a66 SY |
2995 | if (xstate_bv & ~XSTATE_FPSSE) |
2996 | return -EINVAL; | |
7366ed77 | 2997 | memcpy(&vcpu->arch.guest_fpu.state.fxsave, |
c47ada30 | 2998 | guest_xsave->region, sizeof(struct fxregs_state)); |
2d5b5a66 SY |
2999 | } |
3000 | return 0; | |
3001 | } | |
3002 | ||
3003 | static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu, | |
3004 | struct kvm_xcrs *guest_xcrs) | |
3005 | { | |
3006 | if (!cpu_has_xsave) { | |
3007 | guest_xcrs->nr_xcrs = 0; | |
3008 | return; | |
3009 | } | |
3010 | ||
3011 | guest_xcrs->nr_xcrs = 1; | |
3012 | guest_xcrs->flags = 0; | |
3013 | guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK; | |
3014 | guest_xcrs->xcrs[0].value = vcpu->arch.xcr0; | |
3015 | } | |
3016 | ||
3017 | static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu, | |
3018 | struct kvm_xcrs *guest_xcrs) | |
3019 | { | |
3020 | int i, r = 0; | |
3021 | ||
3022 | if (!cpu_has_xsave) | |
3023 | return -EINVAL; | |
3024 | ||
3025 | if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags) | |
3026 | return -EINVAL; | |
3027 | ||
3028 | for (i = 0; i < guest_xcrs->nr_xcrs; i++) | |
3029 | /* Only support XCR0 currently */ | |
c67a04cb | 3030 | if (guest_xcrs->xcrs[i].xcr == XCR_XFEATURE_ENABLED_MASK) { |
2d5b5a66 | 3031 | r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK, |
c67a04cb | 3032 | guest_xcrs->xcrs[i].value); |
2d5b5a66 SY |
3033 | break; |
3034 | } | |
3035 | if (r) | |
3036 | r = -EINVAL; | |
3037 | return r; | |
3038 | } | |
3039 | ||
1c0b28c2 EM |
3040 | /* |
3041 | * kvm_set_guest_paused() indicates to the guest kernel that it has been | |
3042 | * stopped by the hypervisor. This function will be called from the host only. | |
3043 | * EINVAL is returned when the host attempts to set the flag for a guest that | |
3044 | * does not support pv clocks. | |
3045 | */ | |
3046 | static int kvm_set_guest_paused(struct kvm_vcpu *vcpu) | |
3047 | { | |
0b79459b | 3048 | if (!vcpu->arch.pv_time_enabled) |
1c0b28c2 | 3049 | return -EINVAL; |
51d59c6b | 3050 | vcpu->arch.pvclock_set_guest_stopped_request = true; |
1c0b28c2 EM |
3051 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
3052 | return 0; | |
3053 | } | |
3054 | ||
313a3dc7 CO |
3055 | long kvm_arch_vcpu_ioctl(struct file *filp, |
3056 | unsigned int ioctl, unsigned long arg) | |
3057 | { | |
3058 | struct kvm_vcpu *vcpu = filp->private_data; | |
3059 | void __user *argp = (void __user *)arg; | |
3060 | int r; | |
d1ac91d8 AK |
3061 | union { |
3062 | struct kvm_lapic_state *lapic; | |
3063 | struct kvm_xsave *xsave; | |
3064 | struct kvm_xcrs *xcrs; | |
3065 | void *buffer; | |
3066 | } u; | |
3067 | ||
3068 | u.buffer = NULL; | |
313a3dc7 CO |
3069 | switch (ioctl) { |
3070 | case KVM_GET_LAPIC: { | |
2204ae3c MT |
3071 | r = -EINVAL; |
3072 | if (!vcpu->arch.apic) | |
3073 | goto out; | |
d1ac91d8 | 3074 | u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 3075 | |
b772ff36 | 3076 | r = -ENOMEM; |
d1ac91d8 | 3077 | if (!u.lapic) |
b772ff36 | 3078 | goto out; |
d1ac91d8 | 3079 | r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3080 | if (r) |
3081 | goto out; | |
3082 | r = -EFAULT; | |
d1ac91d8 | 3083 | if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
3084 | goto out; |
3085 | r = 0; | |
3086 | break; | |
3087 | } | |
3088 | case KVM_SET_LAPIC: { | |
2204ae3c MT |
3089 | r = -EINVAL; |
3090 | if (!vcpu->arch.apic) | |
3091 | goto out; | |
ff5c2c03 | 3092 | u.lapic = memdup_user(argp, sizeof(*u.lapic)); |
18595411 GC |
3093 | if (IS_ERR(u.lapic)) |
3094 | return PTR_ERR(u.lapic); | |
ff5c2c03 | 3095 | |
d1ac91d8 | 3096 | r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3097 | break; |
3098 | } | |
f77bc6a4 ZX |
3099 | case KVM_INTERRUPT: { |
3100 | struct kvm_interrupt irq; | |
3101 | ||
3102 | r = -EFAULT; | |
3103 | if (copy_from_user(&irq, argp, sizeof irq)) | |
3104 | goto out; | |
3105 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
f77bc6a4 ZX |
3106 | break; |
3107 | } | |
c4abb7c9 JK |
3108 | case KVM_NMI: { |
3109 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
c4abb7c9 JK |
3110 | break; |
3111 | } | |
f077825a PB |
3112 | case KVM_SMI: { |
3113 | r = kvm_vcpu_ioctl_smi(vcpu); | |
3114 | break; | |
3115 | } | |
313a3dc7 CO |
3116 | case KVM_SET_CPUID: { |
3117 | struct kvm_cpuid __user *cpuid_arg = argp; | |
3118 | struct kvm_cpuid cpuid; | |
3119 | ||
3120 | r = -EFAULT; | |
3121 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3122 | goto out; | |
3123 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
313a3dc7 CO |
3124 | break; |
3125 | } | |
07716717 DK |
3126 | case KVM_SET_CPUID2: { |
3127 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3128 | struct kvm_cpuid2 cpuid; | |
3129 | ||
3130 | r = -EFAULT; | |
3131 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3132 | goto out; | |
3133 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 3134 | cpuid_arg->entries); |
07716717 DK |
3135 | break; |
3136 | } | |
3137 | case KVM_GET_CPUID2: { | |
3138 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3139 | struct kvm_cpuid2 cpuid; | |
3140 | ||
3141 | r = -EFAULT; | |
3142 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3143 | goto out; | |
3144 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 3145 | cpuid_arg->entries); |
07716717 DK |
3146 | if (r) |
3147 | goto out; | |
3148 | r = -EFAULT; | |
3149 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
3150 | goto out; | |
3151 | r = 0; | |
3152 | break; | |
3153 | } | |
313a3dc7 | 3154 | case KVM_GET_MSRS: |
609e36d3 | 3155 | r = msr_io(vcpu, argp, do_get_msr, 1); |
313a3dc7 CO |
3156 | break; |
3157 | case KVM_SET_MSRS: | |
3158 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
3159 | break; | |
b209749f AK |
3160 | case KVM_TPR_ACCESS_REPORTING: { |
3161 | struct kvm_tpr_access_ctl tac; | |
3162 | ||
3163 | r = -EFAULT; | |
3164 | if (copy_from_user(&tac, argp, sizeof tac)) | |
3165 | goto out; | |
3166 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
3167 | if (r) | |
3168 | goto out; | |
3169 | r = -EFAULT; | |
3170 | if (copy_to_user(argp, &tac, sizeof tac)) | |
3171 | goto out; | |
3172 | r = 0; | |
3173 | break; | |
3174 | }; | |
b93463aa AK |
3175 | case KVM_SET_VAPIC_ADDR: { |
3176 | struct kvm_vapic_addr va; | |
3177 | ||
3178 | r = -EINVAL; | |
3179 | if (!irqchip_in_kernel(vcpu->kvm)) | |
3180 | goto out; | |
3181 | r = -EFAULT; | |
3182 | if (copy_from_user(&va, argp, sizeof va)) | |
3183 | goto out; | |
fda4e2e8 | 3184 | r = kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); |
b93463aa AK |
3185 | break; |
3186 | } | |
890ca9ae HY |
3187 | case KVM_X86_SETUP_MCE: { |
3188 | u64 mcg_cap; | |
3189 | ||
3190 | r = -EFAULT; | |
3191 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
3192 | goto out; | |
3193 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
3194 | break; | |
3195 | } | |
3196 | case KVM_X86_SET_MCE: { | |
3197 | struct kvm_x86_mce mce; | |
3198 | ||
3199 | r = -EFAULT; | |
3200 | if (copy_from_user(&mce, argp, sizeof mce)) | |
3201 | goto out; | |
3202 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
3203 | break; | |
3204 | } | |
3cfc3092 JK |
3205 | case KVM_GET_VCPU_EVENTS: { |
3206 | struct kvm_vcpu_events events; | |
3207 | ||
3208 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
3209 | ||
3210 | r = -EFAULT; | |
3211 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
3212 | break; | |
3213 | r = 0; | |
3214 | break; | |
3215 | } | |
3216 | case KVM_SET_VCPU_EVENTS: { | |
3217 | struct kvm_vcpu_events events; | |
3218 | ||
3219 | r = -EFAULT; | |
3220 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
3221 | break; | |
3222 | ||
3223 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
3224 | break; | |
3225 | } | |
a1efbe77 JK |
3226 | case KVM_GET_DEBUGREGS: { |
3227 | struct kvm_debugregs dbgregs; | |
3228 | ||
3229 | kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs); | |
3230 | ||
3231 | r = -EFAULT; | |
3232 | if (copy_to_user(argp, &dbgregs, | |
3233 | sizeof(struct kvm_debugregs))) | |
3234 | break; | |
3235 | r = 0; | |
3236 | break; | |
3237 | } | |
3238 | case KVM_SET_DEBUGREGS: { | |
3239 | struct kvm_debugregs dbgregs; | |
3240 | ||
3241 | r = -EFAULT; | |
3242 | if (copy_from_user(&dbgregs, argp, | |
3243 | sizeof(struct kvm_debugregs))) | |
3244 | break; | |
3245 | ||
3246 | r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs); | |
3247 | break; | |
3248 | } | |
2d5b5a66 | 3249 | case KVM_GET_XSAVE: { |
d1ac91d8 | 3250 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 3251 | r = -ENOMEM; |
d1ac91d8 | 3252 | if (!u.xsave) |
2d5b5a66 SY |
3253 | break; |
3254 | ||
d1ac91d8 | 3255 | kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3256 | |
3257 | r = -EFAULT; | |
d1ac91d8 | 3258 | if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
3259 | break; |
3260 | r = 0; | |
3261 | break; | |
3262 | } | |
3263 | case KVM_SET_XSAVE: { | |
ff5c2c03 | 3264 | u.xsave = memdup_user(argp, sizeof(*u.xsave)); |
18595411 GC |
3265 | if (IS_ERR(u.xsave)) |
3266 | return PTR_ERR(u.xsave); | |
2d5b5a66 | 3267 | |
d1ac91d8 | 3268 | r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3269 | break; |
3270 | } | |
3271 | case KVM_GET_XCRS: { | |
d1ac91d8 | 3272 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 3273 | r = -ENOMEM; |
d1ac91d8 | 3274 | if (!u.xcrs) |
2d5b5a66 SY |
3275 | break; |
3276 | ||
d1ac91d8 | 3277 | kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3278 | |
3279 | r = -EFAULT; | |
d1ac91d8 | 3280 | if (copy_to_user(argp, u.xcrs, |
2d5b5a66 SY |
3281 | sizeof(struct kvm_xcrs))) |
3282 | break; | |
3283 | r = 0; | |
3284 | break; | |
3285 | } | |
3286 | case KVM_SET_XCRS: { | |
ff5c2c03 | 3287 | u.xcrs = memdup_user(argp, sizeof(*u.xcrs)); |
18595411 GC |
3288 | if (IS_ERR(u.xcrs)) |
3289 | return PTR_ERR(u.xcrs); | |
2d5b5a66 | 3290 | |
d1ac91d8 | 3291 | r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3292 | break; |
3293 | } | |
92a1f12d JR |
3294 | case KVM_SET_TSC_KHZ: { |
3295 | u32 user_tsc_khz; | |
3296 | ||
3297 | r = -EINVAL; | |
92a1f12d JR |
3298 | user_tsc_khz = (u32)arg; |
3299 | ||
3300 | if (user_tsc_khz >= kvm_max_guest_tsc_khz) | |
3301 | goto out; | |
3302 | ||
cc578287 ZA |
3303 | if (user_tsc_khz == 0) |
3304 | user_tsc_khz = tsc_khz; | |
3305 | ||
3306 | kvm_set_tsc_khz(vcpu, user_tsc_khz); | |
92a1f12d JR |
3307 | |
3308 | r = 0; | |
3309 | goto out; | |
3310 | } | |
3311 | case KVM_GET_TSC_KHZ: { | |
cc578287 | 3312 | r = vcpu->arch.virtual_tsc_khz; |
92a1f12d JR |
3313 | goto out; |
3314 | } | |
1c0b28c2 EM |
3315 | case KVM_KVMCLOCK_CTRL: { |
3316 | r = kvm_set_guest_paused(vcpu); | |
3317 | goto out; | |
3318 | } | |
313a3dc7 CO |
3319 | default: |
3320 | r = -EINVAL; | |
3321 | } | |
3322 | out: | |
d1ac91d8 | 3323 | kfree(u.buffer); |
313a3dc7 CO |
3324 | return r; |
3325 | } | |
3326 | ||
5b1c1493 CO |
3327 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
3328 | { | |
3329 | return VM_FAULT_SIGBUS; | |
3330 | } | |
3331 | ||
1fe779f8 CO |
3332 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
3333 | { | |
3334 | int ret; | |
3335 | ||
3336 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
951179ce | 3337 | return -EINVAL; |
1fe779f8 CO |
3338 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); |
3339 | return ret; | |
3340 | } | |
3341 | ||
b927a3ce SY |
3342 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
3343 | u64 ident_addr) | |
3344 | { | |
3345 | kvm->arch.ept_identity_map_addr = ident_addr; | |
3346 | return 0; | |
3347 | } | |
3348 | ||
1fe779f8 CO |
3349 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
3350 | u32 kvm_nr_mmu_pages) | |
3351 | { | |
3352 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
3353 | return -EINVAL; | |
3354 | ||
79fac95e | 3355 | mutex_lock(&kvm->slots_lock); |
1fe779f8 CO |
3356 | |
3357 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 3358 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 3359 | |
79fac95e | 3360 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
3361 | return 0; |
3362 | } | |
3363 | ||
3364 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
3365 | { | |
39de71ec | 3366 | return kvm->arch.n_max_mmu_pages; |
1fe779f8 CO |
3367 | } |
3368 | ||
1fe779f8 CO |
3369 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
3370 | { | |
3371 | int r; | |
3372 | ||
3373 | r = 0; | |
3374 | switch (chip->chip_id) { | |
3375 | case KVM_IRQCHIP_PIC_MASTER: | |
3376 | memcpy(&chip->chip.pic, | |
3377 | &pic_irqchip(kvm)->pics[0], | |
3378 | sizeof(struct kvm_pic_state)); | |
3379 | break; | |
3380 | case KVM_IRQCHIP_PIC_SLAVE: | |
3381 | memcpy(&chip->chip.pic, | |
3382 | &pic_irqchip(kvm)->pics[1], | |
3383 | sizeof(struct kvm_pic_state)); | |
3384 | break; | |
3385 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 3386 | r = kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3387 | break; |
3388 | default: | |
3389 | r = -EINVAL; | |
3390 | break; | |
3391 | } | |
3392 | return r; | |
3393 | } | |
3394 | ||
3395 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
3396 | { | |
3397 | int r; | |
3398 | ||
3399 | r = 0; | |
3400 | switch (chip->chip_id) { | |
3401 | case KVM_IRQCHIP_PIC_MASTER: | |
f4f51050 | 3402 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3403 | memcpy(&pic_irqchip(kvm)->pics[0], |
3404 | &chip->chip.pic, | |
3405 | sizeof(struct kvm_pic_state)); | |
f4f51050 | 3406 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3407 | break; |
3408 | case KVM_IRQCHIP_PIC_SLAVE: | |
f4f51050 | 3409 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3410 | memcpy(&pic_irqchip(kvm)->pics[1], |
3411 | &chip->chip.pic, | |
3412 | sizeof(struct kvm_pic_state)); | |
f4f51050 | 3413 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3414 | break; |
3415 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 3416 | r = kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3417 | break; |
3418 | default: | |
3419 | r = -EINVAL; | |
3420 | break; | |
3421 | } | |
3422 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
3423 | return r; | |
3424 | } | |
3425 | ||
e0f63cb9 SY |
3426 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
3427 | { | |
3428 | int r = 0; | |
3429 | ||
894a9c55 | 3430 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 3431 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); |
894a9c55 | 3432 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
3433 | return r; |
3434 | } | |
3435 | ||
3436 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
3437 | { | |
3438 | int r = 0; | |
3439 | ||
894a9c55 | 3440 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 3441 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); |
e9f42757 BK |
3442 | kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0); |
3443 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
3444 | return r; | |
3445 | } | |
3446 | ||
3447 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3448 | { | |
3449 | int r = 0; | |
3450 | ||
3451 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
3452 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
3453 | sizeof(ps->channels)); | |
3454 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
3455 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
97e69aa6 | 3456 | memset(&ps->reserved, 0, sizeof(ps->reserved)); |
e9f42757 BK |
3457 | return r; |
3458 | } | |
3459 | ||
3460 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3461 | { | |
3462 | int r = 0, start = 0; | |
3463 | u32 prev_legacy, cur_legacy; | |
3464 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
3465 | prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
3466 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
3467 | if (!prev_legacy && cur_legacy) | |
3468 | start = 1; | |
3469 | memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels, | |
3470 | sizeof(kvm->arch.vpit->pit_state.channels)); | |
3471 | kvm->arch.vpit->pit_state.flags = ps->flags; | |
3472 | kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start); | |
894a9c55 | 3473 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
3474 | return r; |
3475 | } | |
3476 | ||
52d939a0 MT |
3477 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
3478 | struct kvm_reinject_control *control) | |
3479 | { | |
3480 | if (!kvm->arch.vpit) | |
3481 | return -ENXIO; | |
894a9c55 | 3482 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
26ef1924 | 3483 | kvm->arch.vpit->pit_state.reinject = control->pit_reinject; |
894a9c55 | 3484 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 MT |
3485 | return 0; |
3486 | } | |
3487 | ||
95d4c16c | 3488 | /** |
60c34612 TY |
3489 | * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot |
3490 | * @kvm: kvm instance | |
3491 | * @log: slot id and address to which we copy the log | |
95d4c16c | 3492 | * |
e108ff2f PB |
3493 | * Steps 1-4 below provide general overview of dirty page logging. See |
3494 | * kvm_get_dirty_log_protect() function description for additional details. | |
3495 | * | |
3496 | * We call kvm_get_dirty_log_protect() to handle steps 1-3, upon return we | |
3497 | * always flush the TLB (step 4) even if previous step failed and the dirty | |
3498 | * bitmap may be corrupt. Regardless of previous outcome the KVM logging API | |
3499 | * does not preclude user space subsequent dirty log read. Flushing TLB ensures | |
3500 | * writes will be marked dirty for next log read. | |
95d4c16c | 3501 | * |
60c34612 TY |
3502 | * 1. Take a snapshot of the bit and clear it if needed. |
3503 | * 2. Write protect the corresponding page. | |
e108ff2f PB |
3504 | * 3. Copy the snapshot to the userspace. |
3505 | * 4. Flush TLB's if needed. | |
5bb064dc | 3506 | */ |
60c34612 | 3507 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
5bb064dc | 3508 | { |
60c34612 | 3509 | bool is_dirty = false; |
e108ff2f | 3510 | int r; |
5bb064dc | 3511 | |
79fac95e | 3512 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 3513 | |
88178fd4 KH |
3514 | /* |
3515 | * Flush potentially hardware-cached dirty pages to dirty_bitmap. | |
3516 | */ | |
3517 | if (kvm_x86_ops->flush_log_dirty) | |
3518 | kvm_x86_ops->flush_log_dirty(kvm); | |
3519 | ||
e108ff2f | 3520 | r = kvm_get_dirty_log_protect(kvm, log, &is_dirty); |
198c74f4 XG |
3521 | |
3522 | /* | |
3523 | * All the TLBs can be flushed out of mmu lock, see the comments in | |
3524 | * kvm_mmu_slot_remove_write_access(). | |
3525 | */ | |
e108ff2f | 3526 | lockdep_assert_held(&kvm->slots_lock); |
198c74f4 XG |
3527 | if (is_dirty) |
3528 | kvm_flush_remote_tlbs(kvm); | |
3529 | ||
79fac95e | 3530 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
3531 | return r; |
3532 | } | |
3533 | ||
aa2fbe6d YZ |
3534 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, |
3535 | bool line_status) | |
23d43cf9 CD |
3536 | { |
3537 | if (!irqchip_in_kernel(kvm)) | |
3538 | return -ENXIO; | |
3539 | ||
3540 | irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, | |
aa2fbe6d YZ |
3541 | irq_event->irq, irq_event->level, |
3542 | line_status); | |
23d43cf9 CD |
3543 | return 0; |
3544 | } | |
3545 | ||
90de4a18 NA |
3546 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, |
3547 | struct kvm_enable_cap *cap) | |
3548 | { | |
3549 | int r; | |
3550 | ||
3551 | if (cap->flags) | |
3552 | return -EINVAL; | |
3553 | ||
3554 | switch (cap->cap) { | |
3555 | case KVM_CAP_DISABLE_QUIRKS: | |
3556 | kvm->arch.disabled_quirks = cap->args[0]; | |
3557 | r = 0; | |
3558 | break; | |
3559 | default: | |
3560 | r = -EINVAL; | |
3561 | break; | |
3562 | } | |
3563 | return r; | |
3564 | } | |
3565 | ||
1fe779f8 CO |
3566 | long kvm_arch_vm_ioctl(struct file *filp, |
3567 | unsigned int ioctl, unsigned long arg) | |
3568 | { | |
3569 | struct kvm *kvm = filp->private_data; | |
3570 | void __user *argp = (void __user *)arg; | |
367e1319 | 3571 | int r = -ENOTTY; |
f0d66275 DH |
3572 | /* |
3573 | * This union makes it completely explicit to gcc-3.x | |
3574 | * that these two variables' stack usage should be | |
3575 | * combined, not added together. | |
3576 | */ | |
3577 | union { | |
3578 | struct kvm_pit_state ps; | |
e9f42757 | 3579 | struct kvm_pit_state2 ps2; |
c5ff41ce | 3580 | struct kvm_pit_config pit_config; |
f0d66275 | 3581 | } u; |
1fe779f8 CO |
3582 | |
3583 | switch (ioctl) { | |
3584 | case KVM_SET_TSS_ADDR: | |
3585 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
1fe779f8 | 3586 | break; |
b927a3ce SY |
3587 | case KVM_SET_IDENTITY_MAP_ADDR: { |
3588 | u64 ident_addr; | |
3589 | ||
3590 | r = -EFAULT; | |
3591 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
3592 | goto out; | |
3593 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); | |
b927a3ce SY |
3594 | break; |
3595 | } | |
1fe779f8 CO |
3596 | case KVM_SET_NR_MMU_PAGES: |
3597 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
1fe779f8 CO |
3598 | break; |
3599 | case KVM_GET_NR_MMU_PAGES: | |
3600 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
3601 | break; | |
3ddea128 MT |
3602 | case KVM_CREATE_IRQCHIP: { |
3603 | struct kvm_pic *vpic; | |
3604 | ||
3605 | mutex_lock(&kvm->lock); | |
3606 | r = -EEXIST; | |
3607 | if (kvm->arch.vpic) | |
3608 | goto create_irqchip_unlock; | |
3e515705 AK |
3609 | r = -EINVAL; |
3610 | if (atomic_read(&kvm->online_vcpus)) | |
3611 | goto create_irqchip_unlock; | |
1fe779f8 | 3612 | r = -ENOMEM; |
3ddea128 MT |
3613 | vpic = kvm_create_pic(kvm); |
3614 | if (vpic) { | |
1fe779f8 CO |
3615 | r = kvm_ioapic_init(kvm); |
3616 | if (r) { | |
175504cd | 3617 | mutex_lock(&kvm->slots_lock); |
71ba994c | 3618 | kvm_destroy_pic(vpic); |
175504cd | 3619 | mutex_unlock(&kvm->slots_lock); |
3ddea128 | 3620 | goto create_irqchip_unlock; |
1fe779f8 CO |
3621 | } |
3622 | } else | |
3ddea128 | 3623 | goto create_irqchip_unlock; |
399ec807 AK |
3624 | r = kvm_setup_default_irq_routing(kvm); |
3625 | if (r) { | |
175504cd | 3626 | mutex_lock(&kvm->slots_lock); |
3ddea128 | 3627 | mutex_lock(&kvm->irq_lock); |
72bb2fcd | 3628 | kvm_ioapic_destroy(kvm); |
71ba994c | 3629 | kvm_destroy_pic(vpic); |
3ddea128 | 3630 | mutex_unlock(&kvm->irq_lock); |
175504cd | 3631 | mutex_unlock(&kvm->slots_lock); |
71ba994c | 3632 | goto create_irqchip_unlock; |
399ec807 | 3633 | } |
71ba994c PB |
3634 | /* Write kvm->irq_routing before kvm->arch.vpic. */ |
3635 | smp_wmb(); | |
3636 | kvm->arch.vpic = vpic; | |
3ddea128 MT |
3637 | create_irqchip_unlock: |
3638 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 3639 | break; |
3ddea128 | 3640 | } |
7837699f | 3641 | case KVM_CREATE_PIT: |
c5ff41ce JK |
3642 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
3643 | goto create_pit; | |
3644 | case KVM_CREATE_PIT2: | |
3645 | r = -EFAULT; | |
3646 | if (copy_from_user(&u.pit_config, argp, | |
3647 | sizeof(struct kvm_pit_config))) | |
3648 | goto out; | |
3649 | create_pit: | |
79fac95e | 3650 | mutex_lock(&kvm->slots_lock); |
269e05e4 AK |
3651 | r = -EEXIST; |
3652 | if (kvm->arch.vpit) | |
3653 | goto create_pit_unlock; | |
7837699f | 3654 | r = -ENOMEM; |
c5ff41ce | 3655 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
3656 | if (kvm->arch.vpit) |
3657 | r = 0; | |
269e05e4 | 3658 | create_pit_unlock: |
79fac95e | 3659 | mutex_unlock(&kvm->slots_lock); |
7837699f | 3660 | break; |
1fe779f8 CO |
3661 | case KVM_GET_IRQCHIP: { |
3662 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 3663 | struct kvm_irqchip *chip; |
1fe779f8 | 3664 | |
ff5c2c03 SL |
3665 | chip = memdup_user(argp, sizeof(*chip)); |
3666 | if (IS_ERR(chip)) { | |
3667 | r = PTR_ERR(chip); | |
1fe779f8 | 3668 | goto out; |
ff5c2c03 SL |
3669 | } |
3670 | ||
1fe779f8 CO |
3671 | r = -ENXIO; |
3672 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3673 | goto get_irqchip_out; |
3674 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 3675 | if (r) |
f0d66275 | 3676 | goto get_irqchip_out; |
1fe779f8 | 3677 | r = -EFAULT; |
f0d66275 DH |
3678 | if (copy_to_user(argp, chip, sizeof *chip)) |
3679 | goto get_irqchip_out; | |
1fe779f8 | 3680 | r = 0; |
f0d66275 DH |
3681 | get_irqchip_out: |
3682 | kfree(chip); | |
1fe779f8 CO |
3683 | break; |
3684 | } | |
3685 | case KVM_SET_IRQCHIP: { | |
3686 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 3687 | struct kvm_irqchip *chip; |
1fe779f8 | 3688 | |
ff5c2c03 SL |
3689 | chip = memdup_user(argp, sizeof(*chip)); |
3690 | if (IS_ERR(chip)) { | |
3691 | r = PTR_ERR(chip); | |
1fe779f8 | 3692 | goto out; |
ff5c2c03 SL |
3693 | } |
3694 | ||
1fe779f8 CO |
3695 | r = -ENXIO; |
3696 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3697 | goto set_irqchip_out; |
3698 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 3699 | if (r) |
f0d66275 | 3700 | goto set_irqchip_out; |
1fe779f8 | 3701 | r = 0; |
f0d66275 DH |
3702 | set_irqchip_out: |
3703 | kfree(chip); | |
1fe779f8 CO |
3704 | break; |
3705 | } | |
e0f63cb9 | 3706 | case KVM_GET_PIT: { |
e0f63cb9 | 3707 | r = -EFAULT; |
f0d66275 | 3708 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3709 | goto out; |
3710 | r = -ENXIO; | |
3711 | if (!kvm->arch.vpit) | |
3712 | goto out; | |
f0d66275 | 3713 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
3714 | if (r) |
3715 | goto out; | |
3716 | r = -EFAULT; | |
f0d66275 | 3717 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3718 | goto out; |
3719 | r = 0; | |
3720 | break; | |
3721 | } | |
3722 | case KVM_SET_PIT: { | |
e0f63cb9 | 3723 | r = -EFAULT; |
f0d66275 | 3724 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
3725 | goto out; |
3726 | r = -ENXIO; | |
3727 | if (!kvm->arch.vpit) | |
3728 | goto out; | |
f0d66275 | 3729 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
3730 | break; |
3731 | } | |
e9f42757 BK |
3732 | case KVM_GET_PIT2: { |
3733 | r = -ENXIO; | |
3734 | if (!kvm->arch.vpit) | |
3735 | goto out; | |
3736 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
3737 | if (r) | |
3738 | goto out; | |
3739 | r = -EFAULT; | |
3740 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
3741 | goto out; | |
3742 | r = 0; | |
3743 | break; | |
3744 | } | |
3745 | case KVM_SET_PIT2: { | |
3746 | r = -EFAULT; | |
3747 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
3748 | goto out; | |
3749 | r = -ENXIO; | |
3750 | if (!kvm->arch.vpit) | |
3751 | goto out; | |
3752 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
e9f42757 BK |
3753 | break; |
3754 | } | |
52d939a0 MT |
3755 | case KVM_REINJECT_CONTROL: { |
3756 | struct kvm_reinject_control control; | |
3757 | r = -EFAULT; | |
3758 | if (copy_from_user(&control, argp, sizeof(control))) | |
3759 | goto out; | |
3760 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
52d939a0 MT |
3761 | break; |
3762 | } | |
d71ba788 PB |
3763 | case KVM_SET_BOOT_CPU_ID: |
3764 | r = 0; | |
3765 | mutex_lock(&kvm->lock); | |
3766 | if (atomic_read(&kvm->online_vcpus) != 0) | |
3767 | r = -EBUSY; | |
3768 | else | |
3769 | kvm->arch.bsp_vcpu_id = arg; | |
3770 | mutex_unlock(&kvm->lock); | |
3771 | break; | |
ffde22ac ES |
3772 | case KVM_XEN_HVM_CONFIG: { |
3773 | r = -EFAULT; | |
3774 | if (copy_from_user(&kvm->arch.xen_hvm_config, argp, | |
3775 | sizeof(struct kvm_xen_hvm_config))) | |
3776 | goto out; | |
3777 | r = -EINVAL; | |
3778 | if (kvm->arch.xen_hvm_config.flags) | |
3779 | goto out; | |
3780 | r = 0; | |
3781 | break; | |
3782 | } | |
afbcf7ab | 3783 | case KVM_SET_CLOCK: { |
afbcf7ab GC |
3784 | struct kvm_clock_data user_ns; |
3785 | u64 now_ns; | |
3786 | s64 delta; | |
3787 | ||
3788 | r = -EFAULT; | |
3789 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
3790 | goto out; | |
3791 | ||
3792 | r = -EINVAL; | |
3793 | if (user_ns.flags) | |
3794 | goto out; | |
3795 | ||
3796 | r = 0; | |
395c6b0a | 3797 | local_irq_disable(); |
759379dd | 3798 | now_ns = get_kernel_ns(); |
afbcf7ab | 3799 | delta = user_ns.clock - now_ns; |
395c6b0a | 3800 | local_irq_enable(); |
afbcf7ab | 3801 | kvm->arch.kvmclock_offset = delta; |
2e762ff7 | 3802 | kvm_gen_update_masterclock(kvm); |
afbcf7ab GC |
3803 | break; |
3804 | } | |
3805 | case KVM_GET_CLOCK: { | |
afbcf7ab GC |
3806 | struct kvm_clock_data user_ns; |
3807 | u64 now_ns; | |
3808 | ||
395c6b0a | 3809 | local_irq_disable(); |
759379dd | 3810 | now_ns = get_kernel_ns(); |
afbcf7ab | 3811 | user_ns.clock = kvm->arch.kvmclock_offset + now_ns; |
395c6b0a | 3812 | local_irq_enable(); |
afbcf7ab | 3813 | user_ns.flags = 0; |
97e69aa6 | 3814 | memset(&user_ns.pad, 0, sizeof(user_ns.pad)); |
afbcf7ab GC |
3815 | |
3816 | r = -EFAULT; | |
3817 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
3818 | goto out; | |
3819 | r = 0; | |
3820 | break; | |
3821 | } | |
90de4a18 NA |
3822 | case KVM_ENABLE_CAP: { |
3823 | struct kvm_enable_cap cap; | |
afbcf7ab | 3824 | |
90de4a18 NA |
3825 | r = -EFAULT; |
3826 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
3827 | goto out; | |
3828 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
3829 | break; | |
3830 | } | |
1fe779f8 | 3831 | default: |
c274e03a | 3832 | r = kvm_vm_ioctl_assigned_device(kvm, ioctl, arg); |
1fe779f8 CO |
3833 | } |
3834 | out: | |
3835 | return r; | |
3836 | } | |
3837 | ||
a16b043c | 3838 | static void kvm_init_msr_list(void) |
043405e1 CO |
3839 | { |
3840 | u32 dummy[2]; | |
3841 | unsigned i, j; | |
3842 | ||
62ef68bb | 3843 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { |
043405e1 CO |
3844 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
3845 | continue; | |
93c4adc7 PB |
3846 | |
3847 | /* | |
3848 | * Even MSRs that are valid in the host may not be exposed | |
3849 | * to the guests in some cases. We could work around this | |
3850 | * in VMX with the generic MSR save/load machinery, but it | |
3851 | * is not really worthwhile since it will really only | |
3852 | * happen with nested virtualization. | |
3853 | */ | |
3854 | switch (msrs_to_save[i]) { | |
3855 | case MSR_IA32_BNDCFGS: | |
3856 | if (!kvm_x86_ops->mpx_supported()) | |
3857 | continue; | |
3858 | break; | |
3859 | default: | |
3860 | break; | |
3861 | } | |
3862 | ||
043405e1 CO |
3863 | if (j < i) |
3864 | msrs_to_save[j] = msrs_to_save[i]; | |
3865 | j++; | |
3866 | } | |
3867 | num_msrs_to_save = j; | |
62ef68bb PB |
3868 | |
3869 | for (i = j = 0; i < ARRAY_SIZE(emulated_msrs); i++) { | |
3870 | switch (emulated_msrs[i]) { | |
6d396b55 PB |
3871 | case MSR_IA32_SMBASE: |
3872 | if (!kvm_x86_ops->cpu_has_high_real_mode_segbase()) | |
3873 | continue; | |
3874 | break; | |
62ef68bb PB |
3875 | default: |
3876 | break; | |
3877 | } | |
3878 | ||
3879 | if (j < i) | |
3880 | emulated_msrs[j] = emulated_msrs[i]; | |
3881 | j++; | |
3882 | } | |
3883 | num_emulated_msrs = j; | |
043405e1 CO |
3884 | } |
3885 | ||
bda9020e MT |
3886 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
3887 | const void *v) | |
bbd9b64e | 3888 | { |
70252a10 AK |
3889 | int handled = 0; |
3890 | int n; | |
3891 | ||
3892 | do { | |
3893 | n = min(len, 8); | |
3894 | if (!(vcpu->arch.apic && | |
e32edf4f NN |
3895 | !kvm_iodevice_write(vcpu, &vcpu->arch.apic->dev, addr, n, v)) |
3896 | && kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, n, v)) | |
70252a10 AK |
3897 | break; |
3898 | handled += n; | |
3899 | addr += n; | |
3900 | len -= n; | |
3901 | v += n; | |
3902 | } while (len); | |
bbd9b64e | 3903 | |
70252a10 | 3904 | return handled; |
bbd9b64e CO |
3905 | } |
3906 | ||
bda9020e | 3907 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 3908 | { |
70252a10 AK |
3909 | int handled = 0; |
3910 | int n; | |
3911 | ||
3912 | do { | |
3913 | n = min(len, 8); | |
3914 | if (!(vcpu->arch.apic && | |
e32edf4f NN |
3915 | !kvm_iodevice_read(vcpu, &vcpu->arch.apic->dev, |
3916 | addr, n, v)) | |
3917 | && kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, n, v)) | |
70252a10 AK |
3918 | break; |
3919 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, *(u64 *)v); | |
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 | ||
2dafc6c2 GN |
3929 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
3930 | struct kvm_segment *var, int seg) | |
3931 | { | |
3932 | kvm_x86_ops->set_segment(vcpu, var, seg); | |
3933 | } | |
3934 | ||
3935 | void kvm_get_segment(struct kvm_vcpu *vcpu, | |
3936 | struct kvm_segment *var, int seg) | |
3937 | { | |
3938 | kvm_x86_ops->get_segment(vcpu, var, seg); | |
3939 | } | |
3940 | ||
54987b7a PB |
3941 | gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, |
3942 | struct x86_exception *exception) | |
02f59dc9 JR |
3943 | { |
3944 | gpa_t t_gpa; | |
02f59dc9 JR |
3945 | |
3946 | BUG_ON(!mmu_is_nested(vcpu)); | |
3947 | ||
3948 | /* NPT walks are always user-walks */ | |
3949 | access |= PFERR_USER_MASK; | |
54987b7a | 3950 | t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, exception); |
02f59dc9 JR |
3951 | |
3952 | return t_gpa; | |
3953 | } | |
3954 | ||
ab9ae313 AK |
3955 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, |
3956 | struct x86_exception *exception) | |
1871c602 GN |
3957 | { |
3958 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
ab9ae313 | 3959 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
3960 | } |
3961 | ||
ab9ae313 AK |
3962 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, |
3963 | struct x86_exception *exception) | |
1871c602 GN |
3964 | { |
3965 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3966 | access |= PFERR_FETCH_MASK; | |
ab9ae313 | 3967 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
3968 | } |
3969 | ||
ab9ae313 AK |
3970 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, |
3971 | struct x86_exception *exception) | |
1871c602 GN |
3972 | { |
3973 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3974 | access |= PFERR_WRITE_MASK; | |
ab9ae313 | 3975 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
3976 | } |
3977 | ||
3978 | /* uses this to access any guest's mapped memory without checking CPL */ | |
ab9ae313 AK |
3979 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, |
3980 | struct x86_exception *exception) | |
1871c602 | 3981 | { |
ab9ae313 | 3982 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception); |
1871c602 GN |
3983 | } |
3984 | ||
3985 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
3986 | struct kvm_vcpu *vcpu, u32 access, | |
bcc55cba | 3987 | struct x86_exception *exception) |
bbd9b64e CO |
3988 | { |
3989 | void *data = val; | |
10589a46 | 3990 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
3991 | |
3992 | while (bytes) { | |
14dfe855 | 3993 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access, |
ab9ae313 | 3994 | exception); |
bbd9b64e | 3995 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 3996 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
3997 | int ret; |
3998 | ||
bcc55cba | 3999 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4000 | return X86EMUL_PROPAGATE_FAULT; |
54bf36aa PB |
4001 | ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, data, |
4002 | offset, toread); | |
10589a46 | 4003 | if (ret < 0) { |
c3cd7ffa | 4004 | r = X86EMUL_IO_NEEDED; |
10589a46 MT |
4005 | goto out; |
4006 | } | |
bbd9b64e | 4007 | |
77c2002e IE |
4008 | bytes -= toread; |
4009 | data += toread; | |
4010 | addr += toread; | |
bbd9b64e | 4011 | } |
10589a46 | 4012 | out: |
10589a46 | 4013 | return r; |
bbd9b64e | 4014 | } |
77c2002e | 4015 | |
1871c602 | 4016 | /* used for instruction fetching */ |
0f65dd70 AK |
4017 | static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt, |
4018 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4019 | struct x86_exception *exception) |
1871c602 | 4020 | { |
0f65dd70 | 4021 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4022 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
44583cba PB |
4023 | unsigned offset; |
4024 | int ret; | |
0f65dd70 | 4025 | |
44583cba PB |
4026 | /* Inline kvm_read_guest_virt_helper for speed. */ |
4027 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access|PFERR_FETCH_MASK, | |
4028 | exception); | |
4029 | if (unlikely(gpa == UNMAPPED_GVA)) | |
4030 | return X86EMUL_PROPAGATE_FAULT; | |
4031 | ||
4032 | offset = addr & (PAGE_SIZE-1); | |
4033 | if (WARN_ON(offset + bytes > PAGE_SIZE)) | |
4034 | bytes = (unsigned)PAGE_SIZE - offset; | |
54bf36aa PB |
4035 | ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, val, |
4036 | offset, bytes); | |
44583cba PB |
4037 | if (unlikely(ret < 0)) |
4038 | return X86EMUL_IO_NEEDED; | |
4039 | ||
4040 | return X86EMUL_CONTINUE; | |
1871c602 GN |
4041 | } |
4042 | ||
064aea77 | 4043 | int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4044 | gva_t addr, void *val, unsigned int bytes, |
bcc55cba | 4045 | struct x86_exception *exception) |
1871c602 | 4046 | { |
0f65dd70 | 4047 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4048 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
0f65dd70 | 4049 | |
1871c602 | 4050 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, |
bcc55cba | 4051 | exception); |
1871c602 | 4052 | } |
064aea77 | 4053 | EXPORT_SYMBOL_GPL(kvm_read_guest_virt); |
1871c602 | 4054 | |
0f65dd70 AK |
4055 | static int kvm_read_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
4056 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4057 | struct x86_exception *exception) |
1871c602 | 4058 | { |
0f65dd70 | 4059 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
bcc55cba | 4060 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception); |
1871c602 GN |
4061 | } |
4062 | ||
6a4d7550 | 4063 | int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4064 | gva_t addr, void *val, |
2dafc6c2 | 4065 | unsigned int bytes, |
bcc55cba | 4066 | struct x86_exception *exception) |
77c2002e | 4067 | { |
0f65dd70 | 4068 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
77c2002e IE |
4069 | void *data = val; |
4070 | int r = X86EMUL_CONTINUE; | |
4071 | ||
4072 | while (bytes) { | |
14dfe855 JR |
4073 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, |
4074 | PFERR_WRITE_MASK, | |
ab9ae313 | 4075 | exception); |
77c2002e IE |
4076 | unsigned offset = addr & (PAGE_SIZE-1); |
4077 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
4078 | int ret; | |
4079 | ||
bcc55cba | 4080 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4081 | return X86EMUL_PROPAGATE_FAULT; |
54bf36aa | 4082 | ret = kvm_vcpu_write_guest(vcpu, gpa, data, towrite); |
77c2002e | 4083 | if (ret < 0) { |
c3cd7ffa | 4084 | r = X86EMUL_IO_NEEDED; |
77c2002e IE |
4085 | goto out; |
4086 | } | |
4087 | ||
4088 | bytes -= towrite; | |
4089 | data += towrite; | |
4090 | addr += towrite; | |
4091 | } | |
4092 | out: | |
4093 | return r; | |
4094 | } | |
6a4d7550 | 4095 | EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system); |
77c2002e | 4096 | |
af7cc7d1 XG |
4097 | static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva, |
4098 | gpa_t *gpa, struct x86_exception *exception, | |
4099 | bool write) | |
4100 | { | |
97d64b78 AK |
4101 | u32 access = ((kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0) |
4102 | | (write ? PFERR_WRITE_MASK : 0); | |
af7cc7d1 | 4103 | |
97d64b78 | 4104 | if (vcpu_match_mmio_gva(vcpu, gva) |
97ec8c06 FW |
4105 | && !permission_fault(vcpu, vcpu->arch.walk_mmu, |
4106 | vcpu->arch.access, access)) { | |
bebb106a XG |
4107 | *gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT | |
4108 | (gva & (PAGE_SIZE - 1)); | |
4f022648 | 4109 | trace_vcpu_match_mmio(gva, *gpa, write, false); |
bebb106a XG |
4110 | return 1; |
4111 | } | |
4112 | ||
af7cc7d1 XG |
4113 | *gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
4114 | ||
4115 | if (*gpa == UNMAPPED_GVA) | |
4116 | return -1; | |
4117 | ||
4118 | /* For APIC access vmexit */ | |
4119 | if ((*gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4120 | return 1; | |
4121 | ||
4f022648 XG |
4122 | if (vcpu_match_mmio_gpa(vcpu, *gpa)) { |
4123 | trace_vcpu_match_mmio(gva, *gpa, write, true); | |
bebb106a | 4124 | return 1; |
4f022648 | 4125 | } |
bebb106a | 4126 | |
af7cc7d1 XG |
4127 | return 0; |
4128 | } | |
4129 | ||
3200f405 | 4130 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
bcc55cba | 4131 | const void *val, int bytes) |
bbd9b64e CO |
4132 | { |
4133 | int ret; | |
4134 | ||
54bf36aa | 4135 | ret = kvm_vcpu_write_guest(vcpu, gpa, val, bytes); |
9f811285 | 4136 | if (ret < 0) |
bbd9b64e | 4137 | return 0; |
f57f2ef5 | 4138 | kvm_mmu_pte_write(vcpu, gpa, val, bytes); |
bbd9b64e CO |
4139 | return 1; |
4140 | } | |
4141 | ||
77d197b2 XG |
4142 | struct read_write_emulator_ops { |
4143 | int (*read_write_prepare)(struct kvm_vcpu *vcpu, void *val, | |
4144 | int bytes); | |
4145 | int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4146 | void *val, int bytes); | |
4147 | int (*read_write_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4148 | int bytes, void *val); | |
4149 | int (*read_write_exit_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4150 | void *val, int bytes); | |
4151 | bool write; | |
4152 | }; | |
4153 | ||
4154 | static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes) | |
4155 | { | |
4156 | if (vcpu->mmio_read_completed) { | |
77d197b2 | 4157 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
f78146b0 | 4158 | vcpu->mmio_fragments[0].gpa, *(u64 *)val); |
77d197b2 XG |
4159 | vcpu->mmio_read_completed = 0; |
4160 | return 1; | |
4161 | } | |
4162 | ||
4163 | return 0; | |
4164 | } | |
4165 | ||
4166 | static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4167 | void *val, int bytes) | |
4168 | { | |
54bf36aa | 4169 | return !kvm_vcpu_read_guest(vcpu, gpa, val, bytes); |
77d197b2 XG |
4170 | } |
4171 | ||
4172 | static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4173 | void *val, int bytes) | |
4174 | { | |
4175 | return emulator_write_phys(vcpu, gpa, val, bytes); | |
4176 | } | |
4177 | ||
4178 | static int write_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val) | |
4179 | { | |
4180 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); | |
4181 | return vcpu_mmio_write(vcpu, gpa, bytes, val); | |
4182 | } | |
4183 | ||
4184 | static int read_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4185 | void *val, int bytes) | |
4186 | { | |
4187 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
4188 | return X86EMUL_IO_NEEDED; | |
4189 | } | |
4190 | ||
4191 | static int write_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4192 | void *val, int bytes) | |
4193 | { | |
f78146b0 AK |
4194 | struct kvm_mmio_fragment *frag = &vcpu->mmio_fragments[0]; |
4195 | ||
87da7e66 | 4196 | memcpy(vcpu->run->mmio.data, frag->data, min(8u, frag->len)); |
77d197b2 XG |
4197 | return X86EMUL_CONTINUE; |
4198 | } | |
4199 | ||
0fbe9b0b | 4200 | static const struct read_write_emulator_ops read_emultor = { |
77d197b2 XG |
4201 | .read_write_prepare = read_prepare, |
4202 | .read_write_emulate = read_emulate, | |
4203 | .read_write_mmio = vcpu_mmio_read, | |
4204 | .read_write_exit_mmio = read_exit_mmio, | |
4205 | }; | |
4206 | ||
0fbe9b0b | 4207 | static const struct read_write_emulator_ops write_emultor = { |
77d197b2 XG |
4208 | .read_write_emulate = write_emulate, |
4209 | .read_write_mmio = write_mmio, | |
4210 | .read_write_exit_mmio = write_exit_mmio, | |
4211 | .write = true, | |
4212 | }; | |
4213 | ||
22388a3c XG |
4214 | static int emulator_read_write_onepage(unsigned long addr, void *val, |
4215 | unsigned int bytes, | |
4216 | struct x86_exception *exception, | |
4217 | struct kvm_vcpu *vcpu, | |
0fbe9b0b | 4218 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 4219 | { |
af7cc7d1 XG |
4220 | gpa_t gpa; |
4221 | int handled, ret; | |
22388a3c | 4222 | bool write = ops->write; |
f78146b0 | 4223 | struct kvm_mmio_fragment *frag; |
10589a46 | 4224 | |
22388a3c | 4225 | ret = vcpu_mmio_gva_to_gpa(vcpu, addr, &gpa, exception, write); |
bbd9b64e | 4226 | |
af7cc7d1 | 4227 | if (ret < 0) |
bbd9b64e | 4228 | return X86EMUL_PROPAGATE_FAULT; |
bbd9b64e CO |
4229 | |
4230 | /* For APIC access vmexit */ | |
af7cc7d1 | 4231 | if (ret) |
bbd9b64e CO |
4232 | goto mmio; |
4233 | ||
22388a3c | 4234 | if (ops->read_write_emulate(vcpu, gpa, val, bytes)) |
bbd9b64e CO |
4235 | return X86EMUL_CONTINUE; |
4236 | ||
4237 | mmio: | |
4238 | /* | |
4239 | * Is this MMIO handled locally? | |
4240 | */ | |
22388a3c | 4241 | handled = ops->read_write_mmio(vcpu, gpa, bytes, val); |
70252a10 | 4242 | if (handled == bytes) |
bbd9b64e | 4243 | return X86EMUL_CONTINUE; |
bbd9b64e | 4244 | |
70252a10 AK |
4245 | gpa += handled; |
4246 | bytes -= handled; | |
4247 | val += handled; | |
4248 | ||
87da7e66 XG |
4249 | WARN_ON(vcpu->mmio_nr_fragments >= KVM_MAX_MMIO_FRAGMENTS); |
4250 | frag = &vcpu->mmio_fragments[vcpu->mmio_nr_fragments++]; | |
4251 | frag->gpa = gpa; | |
4252 | frag->data = val; | |
4253 | frag->len = bytes; | |
f78146b0 | 4254 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
4255 | } |
4256 | ||
52eb5a6d XL |
4257 | static int emulator_read_write(struct x86_emulate_ctxt *ctxt, |
4258 | unsigned long addr, | |
22388a3c XG |
4259 | void *val, unsigned int bytes, |
4260 | struct x86_exception *exception, | |
0fbe9b0b | 4261 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 4262 | { |
0f65dd70 | 4263 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
f78146b0 AK |
4264 | gpa_t gpa; |
4265 | int rc; | |
4266 | ||
4267 | if (ops->read_write_prepare && | |
4268 | ops->read_write_prepare(vcpu, val, bytes)) | |
4269 | return X86EMUL_CONTINUE; | |
4270 | ||
4271 | vcpu->mmio_nr_fragments = 0; | |
0f65dd70 | 4272 | |
bbd9b64e CO |
4273 | /* Crossing a page boundary? */ |
4274 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
f78146b0 | 4275 | int now; |
bbd9b64e CO |
4276 | |
4277 | now = -addr & ~PAGE_MASK; | |
22388a3c XG |
4278 | rc = emulator_read_write_onepage(addr, val, now, exception, |
4279 | vcpu, ops); | |
4280 | ||
bbd9b64e CO |
4281 | if (rc != X86EMUL_CONTINUE) |
4282 | return rc; | |
4283 | addr += now; | |
bac15531 NA |
4284 | if (ctxt->mode != X86EMUL_MODE_PROT64) |
4285 | addr = (u32)addr; | |
bbd9b64e CO |
4286 | val += now; |
4287 | bytes -= now; | |
4288 | } | |
22388a3c | 4289 | |
f78146b0 AK |
4290 | rc = emulator_read_write_onepage(addr, val, bytes, exception, |
4291 | vcpu, ops); | |
4292 | if (rc != X86EMUL_CONTINUE) | |
4293 | return rc; | |
4294 | ||
4295 | if (!vcpu->mmio_nr_fragments) | |
4296 | return rc; | |
4297 | ||
4298 | gpa = vcpu->mmio_fragments[0].gpa; | |
4299 | ||
4300 | vcpu->mmio_needed = 1; | |
4301 | vcpu->mmio_cur_fragment = 0; | |
4302 | ||
87da7e66 | 4303 | vcpu->run->mmio.len = min(8u, vcpu->mmio_fragments[0].len); |
f78146b0 AK |
4304 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = ops->write; |
4305 | vcpu->run->exit_reason = KVM_EXIT_MMIO; | |
4306 | vcpu->run->mmio.phys_addr = gpa; | |
4307 | ||
4308 | return ops->read_write_exit_mmio(vcpu, gpa, val, bytes); | |
22388a3c XG |
4309 | } |
4310 | ||
4311 | static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt, | |
4312 | unsigned long addr, | |
4313 | void *val, | |
4314 | unsigned int bytes, | |
4315 | struct x86_exception *exception) | |
4316 | { | |
4317 | return emulator_read_write(ctxt, addr, val, bytes, | |
4318 | exception, &read_emultor); | |
4319 | } | |
4320 | ||
52eb5a6d | 4321 | static int emulator_write_emulated(struct x86_emulate_ctxt *ctxt, |
22388a3c XG |
4322 | unsigned long addr, |
4323 | const void *val, | |
4324 | unsigned int bytes, | |
4325 | struct x86_exception *exception) | |
4326 | { | |
4327 | return emulator_read_write(ctxt, addr, (void *)val, bytes, | |
4328 | exception, &write_emultor); | |
bbd9b64e | 4329 | } |
bbd9b64e | 4330 | |
daea3e73 AK |
4331 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
4332 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) | |
4333 | ||
4334 | #ifdef CONFIG_X86_64 | |
4335 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) | |
4336 | #else | |
4337 | # define CMPXCHG64(ptr, old, new) \ | |
9749a6c0 | 4338 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
daea3e73 AK |
4339 | #endif |
4340 | ||
0f65dd70 AK |
4341 | static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, |
4342 | unsigned long addr, | |
bbd9b64e CO |
4343 | const void *old, |
4344 | const void *new, | |
4345 | unsigned int bytes, | |
0f65dd70 | 4346 | struct x86_exception *exception) |
bbd9b64e | 4347 | { |
0f65dd70 | 4348 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
daea3e73 AK |
4349 | gpa_t gpa; |
4350 | struct page *page; | |
4351 | char *kaddr; | |
4352 | bool exchanged; | |
2bacc55c | 4353 | |
daea3e73 AK |
4354 | /* guests cmpxchg8b have to be emulated atomically */ |
4355 | if (bytes > 8 || (bytes & (bytes - 1))) | |
4356 | goto emul_write; | |
10589a46 | 4357 | |
daea3e73 | 4358 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
2bacc55c | 4359 | |
daea3e73 AK |
4360 | if (gpa == UNMAPPED_GVA || |
4361 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4362 | goto emul_write; | |
2bacc55c | 4363 | |
daea3e73 AK |
4364 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
4365 | goto emul_write; | |
72dc67a6 | 4366 | |
54bf36aa | 4367 | page = kvm_vcpu_gfn_to_page(vcpu, gpa >> PAGE_SHIFT); |
32cad84f | 4368 | if (is_error_page(page)) |
c19b8bd6 | 4369 | goto emul_write; |
72dc67a6 | 4370 | |
8fd75e12 | 4371 | kaddr = kmap_atomic(page); |
daea3e73 AK |
4372 | kaddr += offset_in_page(gpa); |
4373 | switch (bytes) { | |
4374 | case 1: | |
4375 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); | |
4376 | break; | |
4377 | case 2: | |
4378 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); | |
4379 | break; | |
4380 | case 4: | |
4381 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); | |
4382 | break; | |
4383 | case 8: | |
4384 | exchanged = CMPXCHG64(kaddr, old, new); | |
4385 | break; | |
4386 | default: | |
4387 | BUG(); | |
2bacc55c | 4388 | } |
8fd75e12 | 4389 | kunmap_atomic(kaddr); |
daea3e73 AK |
4390 | kvm_release_page_dirty(page); |
4391 | ||
4392 | if (!exchanged) | |
4393 | return X86EMUL_CMPXCHG_FAILED; | |
4394 | ||
54bf36aa | 4395 | kvm_vcpu_mark_page_dirty(vcpu, gpa >> PAGE_SHIFT); |
f57f2ef5 | 4396 | kvm_mmu_pte_write(vcpu, gpa, new, bytes); |
8f6abd06 GN |
4397 | |
4398 | return X86EMUL_CONTINUE; | |
4a5f48f6 | 4399 | |
3200f405 | 4400 | emul_write: |
daea3e73 | 4401 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c | 4402 | |
0f65dd70 | 4403 | return emulator_write_emulated(ctxt, addr, new, bytes, exception); |
bbd9b64e CO |
4404 | } |
4405 | ||
cf8f70bf GN |
4406 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
4407 | { | |
4408 | /* TODO: String I/O for in kernel device */ | |
4409 | int r; | |
4410 | ||
4411 | if (vcpu->arch.pio.in) | |
e32edf4f | 4412 | r = kvm_io_bus_read(vcpu, KVM_PIO_BUS, vcpu->arch.pio.port, |
cf8f70bf GN |
4413 | vcpu->arch.pio.size, pd); |
4414 | else | |
e32edf4f | 4415 | r = kvm_io_bus_write(vcpu, KVM_PIO_BUS, |
cf8f70bf GN |
4416 | vcpu->arch.pio.port, vcpu->arch.pio.size, |
4417 | pd); | |
4418 | return r; | |
4419 | } | |
4420 | ||
6f6fbe98 XG |
4421 | static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size, |
4422 | unsigned short port, void *val, | |
4423 | unsigned int count, bool in) | |
cf8f70bf | 4424 | { |
cf8f70bf | 4425 | vcpu->arch.pio.port = port; |
6f6fbe98 | 4426 | vcpu->arch.pio.in = in; |
7972995b | 4427 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
4428 | vcpu->arch.pio.size = size; |
4429 | ||
4430 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
7972995b | 4431 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4432 | return 1; |
4433 | } | |
4434 | ||
4435 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
6f6fbe98 | 4436 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; |
cf8f70bf GN |
4437 | vcpu->run->io.size = size; |
4438 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
4439 | vcpu->run->io.count = count; | |
4440 | vcpu->run->io.port = port; | |
4441 | ||
4442 | return 0; | |
4443 | } | |
4444 | ||
6f6fbe98 XG |
4445 | static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt, |
4446 | int size, unsigned short port, void *val, | |
4447 | unsigned int count) | |
cf8f70bf | 4448 | { |
ca1d4a9e | 4449 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
6f6fbe98 | 4450 | int ret; |
ca1d4a9e | 4451 | |
6f6fbe98 XG |
4452 | if (vcpu->arch.pio.count) |
4453 | goto data_avail; | |
cf8f70bf | 4454 | |
6f6fbe98 XG |
4455 | ret = emulator_pio_in_out(vcpu, size, port, val, count, true); |
4456 | if (ret) { | |
4457 | data_avail: | |
4458 | memcpy(val, vcpu->arch.pio_data, size * count); | |
1171903d | 4459 | trace_kvm_pio(KVM_PIO_IN, port, size, count, vcpu->arch.pio_data); |
7972995b | 4460 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4461 | return 1; |
4462 | } | |
4463 | ||
cf8f70bf GN |
4464 | return 0; |
4465 | } | |
4466 | ||
6f6fbe98 XG |
4467 | static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt, |
4468 | int size, unsigned short port, | |
4469 | const void *val, unsigned int count) | |
4470 | { | |
4471 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4472 | ||
4473 | memcpy(vcpu->arch.pio_data, val, size * count); | |
1171903d | 4474 | trace_kvm_pio(KVM_PIO_OUT, port, size, count, vcpu->arch.pio_data); |
6f6fbe98 XG |
4475 | return emulator_pio_in_out(vcpu, size, port, (void *)val, count, false); |
4476 | } | |
4477 | ||
bbd9b64e CO |
4478 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
4479 | { | |
4480 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
4481 | } | |
4482 | ||
3cb16fe7 | 4483 | static void emulator_invlpg(struct x86_emulate_ctxt *ctxt, ulong address) |
bbd9b64e | 4484 | { |
3cb16fe7 | 4485 | kvm_mmu_invlpg(emul_to_vcpu(ctxt), address); |
bbd9b64e CO |
4486 | } |
4487 | ||
5cb56059 | 4488 | int kvm_emulate_wbinvd_noskip(struct kvm_vcpu *vcpu) |
f5f48ee1 SY |
4489 | { |
4490 | if (!need_emulate_wbinvd(vcpu)) | |
4491 | return X86EMUL_CONTINUE; | |
4492 | ||
4493 | if (kvm_x86_ops->has_wbinvd_exit()) { | |
2eec7343 JK |
4494 | int cpu = get_cpu(); |
4495 | ||
4496 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
f5f48ee1 SY |
4497 | smp_call_function_many(vcpu->arch.wbinvd_dirty_mask, |
4498 | wbinvd_ipi, NULL, 1); | |
2eec7343 | 4499 | put_cpu(); |
f5f48ee1 | 4500 | cpumask_clear(vcpu->arch.wbinvd_dirty_mask); |
2eec7343 JK |
4501 | } else |
4502 | wbinvd(); | |
f5f48ee1 SY |
4503 | return X86EMUL_CONTINUE; |
4504 | } | |
5cb56059 JS |
4505 | |
4506 | int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
4507 | { | |
4508 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
4509 | return kvm_emulate_wbinvd_noskip(vcpu); | |
4510 | } | |
f5f48ee1 SY |
4511 | EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd); |
4512 | ||
5cb56059 JS |
4513 | |
4514 | ||
bcaf5cc5 AK |
4515 | static void emulator_wbinvd(struct x86_emulate_ctxt *ctxt) |
4516 | { | |
5cb56059 | 4517 | kvm_emulate_wbinvd_noskip(emul_to_vcpu(ctxt)); |
bcaf5cc5 AK |
4518 | } |
4519 | ||
52eb5a6d XL |
4520 | static int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, |
4521 | unsigned long *dest) | |
bbd9b64e | 4522 | { |
16f8a6f9 | 4523 | return kvm_get_dr(emul_to_vcpu(ctxt), dr, dest); |
bbd9b64e CO |
4524 | } |
4525 | ||
52eb5a6d XL |
4526 | static int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, |
4527 | unsigned long value) | |
bbd9b64e | 4528 | { |
338dbc97 | 4529 | |
717746e3 | 4530 | return __kvm_set_dr(emul_to_vcpu(ctxt), dr, value); |
bbd9b64e CO |
4531 | } |
4532 | ||
52a46617 | 4533 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
5fdbf976 | 4534 | { |
52a46617 | 4535 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
5fdbf976 MT |
4536 | } |
4537 | ||
717746e3 | 4538 | static unsigned long emulator_get_cr(struct x86_emulate_ctxt *ctxt, int cr) |
bbd9b64e | 4539 | { |
717746e3 | 4540 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
52a46617 GN |
4541 | unsigned long value; |
4542 | ||
4543 | switch (cr) { | |
4544 | case 0: | |
4545 | value = kvm_read_cr0(vcpu); | |
4546 | break; | |
4547 | case 2: | |
4548 | value = vcpu->arch.cr2; | |
4549 | break; | |
4550 | case 3: | |
9f8fe504 | 4551 | value = kvm_read_cr3(vcpu); |
52a46617 GN |
4552 | break; |
4553 | case 4: | |
4554 | value = kvm_read_cr4(vcpu); | |
4555 | break; | |
4556 | case 8: | |
4557 | value = kvm_get_cr8(vcpu); | |
4558 | break; | |
4559 | default: | |
a737f256 | 4560 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
52a46617 GN |
4561 | return 0; |
4562 | } | |
4563 | ||
4564 | return value; | |
4565 | } | |
4566 | ||
717746e3 | 4567 | static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val) |
52a46617 | 4568 | { |
717746e3 | 4569 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
0f12244f GN |
4570 | int res = 0; |
4571 | ||
52a46617 GN |
4572 | switch (cr) { |
4573 | case 0: | |
49a9b07e | 4574 | res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
52a46617 GN |
4575 | break; |
4576 | case 2: | |
4577 | vcpu->arch.cr2 = val; | |
4578 | break; | |
4579 | case 3: | |
2390218b | 4580 | res = kvm_set_cr3(vcpu, val); |
52a46617 GN |
4581 | break; |
4582 | case 4: | |
a83b29c6 | 4583 | res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
52a46617 GN |
4584 | break; |
4585 | case 8: | |
eea1cff9 | 4586 | res = kvm_set_cr8(vcpu, val); |
52a46617 GN |
4587 | break; |
4588 | default: | |
a737f256 | 4589 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
0f12244f | 4590 | res = -1; |
52a46617 | 4591 | } |
0f12244f GN |
4592 | |
4593 | return res; | |
52a46617 GN |
4594 | } |
4595 | ||
717746e3 | 4596 | static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt) |
9c537244 | 4597 | { |
717746e3 | 4598 | return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt)); |
9c537244 GN |
4599 | } |
4600 | ||
4bff1e86 | 4601 | static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
2dafc6c2 | 4602 | { |
4bff1e86 | 4603 | kvm_x86_ops->get_gdt(emul_to_vcpu(ctxt), dt); |
2dafc6c2 GN |
4604 | } |
4605 | ||
4bff1e86 | 4606 | static void emulator_get_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
160ce1f1 | 4607 | { |
4bff1e86 | 4608 | kvm_x86_ops->get_idt(emul_to_vcpu(ctxt), dt); |
160ce1f1 MG |
4609 | } |
4610 | ||
1ac9d0cf AK |
4611 | static void emulator_set_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
4612 | { | |
4613 | kvm_x86_ops->set_gdt(emul_to_vcpu(ctxt), dt); | |
4614 | } | |
4615 | ||
4616 | static void emulator_set_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) | |
4617 | { | |
4618 | kvm_x86_ops->set_idt(emul_to_vcpu(ctxt), dt); | |
4619 | } | |
4620 | ||
4bff1e86 AK |
4621 | static unsigned long emulator_get_cached_segment_base( |
4622 | struct x86_emulate_ctxt *ctxt, int seg) | |
5951c442 | 4623 | { |
4bff1e86 | 4624 | return get_segment_base(emul_to_vcpu(ctxt), seg); |
5951c442 GN |
4625 | } |
4626 | ||
1aa36616 AK |
4627 | static bool emulator_get_segment(struct x86_emulate_ctxt *ctxt, u16 *selector, |
4628 | struct desc_struct *desc, u32 *base3, | |
4629 | int seg) | |
2dafc6c2 GN |
4630 | { |
4631 | struct kvm_segment var; | |
4632 | ||
4bff1e86 | 4633 | kvm_get_segment(emul_to_vcpu(ctxt), &var, seg); |
1aa36616 | 4634 | *selector = var.selector; |
2dafc6c2 | 4635 | |
378a8b09 GN |
4636 | if (var.unusable) { |
4637 | memset(desc, 0, sizeof(*desc)); | |
2dafc6c2 | 4638 | return false; |
378a8b09 | 4639 | } |
2dafc6c2 GN |
4640 | |
4641 | if (var.g) | |
4642 | var.limit >>= 12; | |
4643 | set_desc_limit(desc, var.limit); | |
4644 | set_desc_base(desc, (unsigned long)var.base); | |
5601d05b GN |
4645 | #ifdef CONFIG_X86_64 |
4646 | if (base3) | |
4647 | *base3 = var.base >> 32; | |
4648 | #endif | |
2dafc6c2 GN |
4649 | desc->type = var.type; |
4650 | desc->s = var.s; | |
4651 | desc->dpl = var.dpl; | |
4652 | desc->p = var.present; | |
4653 | desc->avl = var.avl; | |
4654 | desc->l = var.l; | |
4655 | desc->d = var.db; | |
4656 | desc->g = var.g; | |
4657 | ||
4658 | return true; | |
4659 | } | |
4660 | ||
1aa36616 AK |
4661 | static void emulator_set_segment(struct x86_emulate_ctxt *ctxt, u16 selector, |
4662 | struct desc_struct *desc, u32 base3, | |
4663 | int seg) | |
2dafc6c2 | 4664 | { |
4bff1e86 | 4665 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
2dafc6c2 GN |
4666 | struct kvm_segment var; |
4667 | ||
1aa36616 | 4668 | var.selector = selector; |
2dafc6c2 | 4669 | var.base = get_desc_base(desc); |
5601d05b GN |
4670 | #ifdef CONFIG_X86_64 |
4671 | var.base |= ((u64)base3) << 32; | |
4672 | #endif | |
2dafc6c2 GN |
4673 | var.limit = get_desc_limit(desc); |
4674 | if (desc->g) | |
4675 | var.limit = (var.limit << 12) | 0xfff; | |
4676 | var.type = desc->type; | |
2dafc6c2 GN |
4677 | var.dpl = desc->dpl; |
4678 | var.db = desc->d; | |
4679 | var.s = desc->s; | |
4680 | var.l = desc->l; | |
4681 | var.g = desc->g; | |
4682 | var.avl = desc->avl; | |
4683 | var.present = desc->p; | |
4684 | var.unusable = !var.present; | |
4685 | var.padding = 0; | |
4686 | ||
4687 | kvm_set_segment(vcpu, &var, seg); | |
4688 | return; | |
4689 | } | |
4690 | ||
717746e3 AK |
4691 | static int emulator_get_msr(struct x86_emulate_ctxt *ctxt, |
4692 | u32 msr_index, u64 *pdata) | |
4693 | { | |
609e36d3 PB |
4694 | struct msr_data msr; |
4695 | int r; | |
4696 | ||
4697 | msr.index = msr_index; | |
4698 | msr.host_initiated = false; | |
4699 | r = kvm_get_msr(emul_to_vcpu(ctxt), &msr); | |
4700 | if (r) | |
4701 | return r; | |
4702 | ||
4703 | *pdata = msr.data; | |
4704 | return 0; | |
717746e3 AK |
4705 | } |
4706 | ||
4707 | static int emulator_set_msr(struct x86_emulate_ctxt *ctxt, | |
4708 | u32 msr_index, u64 data) | |
4709 | { | |
8fe8ab46 WA |
4710 | struct msr_data msr; |
4711 | ||
4712 | msr.data = data; | |
4713 | msr.index = msr_index; | |
4714 | msr.host_initiated = false; | |
4715 | return kvm_set_msr(emul_to_vcpu(ctxt), &msr); | |
717746e3 AK |
4716 | } |
4717 | ||
64d60670 PB |
4718 | static u64 emulator_get_smbase(struct x86_emulate_ctxt *ctxt) |
4719 | { | |
4720 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4721 | ||
4722 | return vcpu->arch.smbase; | |
4723 | } | |
4724 | ||
4725 | static void emulator_set_smbase(struct x86_emulate_ctxt *ctxt, u64 smbase) | |
4726 | { | |
4727 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4728 | ||
4729 | vcpu->arch.smbase = smbase; | |
4730 | } | |
4731 | ||
67f4d428 NA |
4732 | static int emulator_check_pmc(struct x86_emulate_ctxt *ctxt, |
4733 | u32 pmc) | |
4734 | { | |
c6702c9d | 4735 | return kvm_pmu_is_valid_msr_idx(emul_to_vcpu(ctxt), pmc); |
67f4d428 NA |
4736 | } |
4737 | ||
222d21aa AK |
4738 | static int emulator_read_pmc(struct x86_emulate_ctxt *ctxt, |
4739 | u32 pmc, u64 *pdata) | |
4740 | { | |
c6702c9d | 4741 | return kvm_pmu_rdpmc(emul_to_vcpu(ctxt), pmc, pdata); |
222d21aa AK |
4742 | } |
4743 | ||
6c3287f7 AK |
4744 | static void emulator_halt(struct x86_emulate_ctxt *ctxt) |
4745 | { | |
4746 | emul_to_vcpu(ctxt)->arch.halt_request = 1; | |
4747 | } | |
4748 | ||
5037f6f3 AK |
4749 | static void emulator_get_fpu(struct x86_emulate_ctxt *ctxt) |
4750 | { | |
4751 | preempt_disable(); | |
5197b808 | 4752 | kvm_load_guest_fpu(emul_to_vcpu(ctxt)); |
5037f6f3 AK |
4753 | /* |
4754 | * CR0.TS may reference the host fpu state, not the guest fpu state, | |
4755 | * so it may be clear at this point. | |
4756 | */ | |
4757 | clts(); | |
4758 | } | |
4759 | ||
4760 | static void emulator_put_fpu(struct x86_emulate_ctxt *ctxt) | |
4761 | { | |
4762 | preempt_enable(); | |
4763 | } | |
4764 | ||
2953538e | 4765 | static int emulator_intercept(struct x86_emulate_ctxt *ctxt, |
8a76d7f2 | 4766 | struct x86_instruction_info *info, |
c4f035c6 AK |
4767 | enum x86_intercept_stage stage) |
4768 | { | |
2953538e | 4769 | return kvm_x86_ops->check_intercept(emul_to_vcpu(ctxt), info, stage); |
c4f035c6 AK |
4770 | } |
4771 | ||
0017f93a | 4772 | static void emulator_get_cpuid(struct x86_emulate_ctxt *ctxt, |
bdb42f5a SB |
4773 | u32 *eax, u32 *ebx, u32 *ecx, u32 *edx) |
4774 | { | |
0017f93a | 4775 | kvm_cpuid(emul_to_vcpu(ctxt), eax, ebx, ecx, edx); |
bdb42f5a SB |
4776 | } |
4777 | ||
dd856efa AK |
4778 | static ulong emulator_read_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg) |
4779 | { | |
4780 | return kvm_register_read(emul_to_vcpu(ctxt), reg); | |
4781 | } | |
4782 | ||
4783 | static void emulator_write_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg, ulong val) | |
4784 | { | |
4785 | kvm_register_write(emul_to_vcpu(ctxt), reg, val); | |
4786 | } | |
4787 | ||
801806d9 NA |
4788 | static void emulator_set_nmi_mask(struct x86_emulate_ctxt *ctxt, bool masked) |
4789 | { | |
4790 | kvm_x86_ops->set_nmi_mask(emul_to_vcpu(ctxt), masked); | |
4791 | } | |
4792 | ||
0225fb50 | 4793 | static const struct x86_emulate_ops emulate_ops = { |
dd856efa AK |
4794 | .read_gpr = emulator_read_gpr, |
4795 | .write_gpr = emulator_write_gpr, | |
1871c602 | 4796 | .read_std = kvm_read_guest_virt_system, |
2dafc6c2 | 4797 | .write_std = kvm_write_guest_virt_system, |
1871c602 | 4798 | .fetch = kvm_fetch_guest_virt, |
bbd9b64e CO |
4799 | .read_emulated = emulator_read_emulated, |
4800 | .write_emulated = emulator_write_emulated, | |
4801 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
3cb16fe7 | 4802 | .invlpg = emulator_invlpg, |
cf8f70bf GN |
4803 | .pio_in_emulated = emulator_pio_in_emulated, |
4804 | .pio_out_emulated = emulator_pio_out_emulated, | |
1aa36616 AK |
4805 | .get_segment = emulator_get_segment, |
4806 | .set_segment = emulator_set_segment, | |
5951c442 | 4807 | .get_cached_segment_base = emulator_get_cached_segment_base, |
2dafc6c2 | 4808 | .get_gdt = emulator_get_gdt, |
160ce1f1 | 4809 | .get_idt = emulator_get_idt, |
1ac9d0cf AK |
4810 | .set_gdt = emulator_set_gdt, |
4811 | .set_idt = emulator_set_idt, | |
52a46617 GN |
4812 | .get_cr = emulator_get_cr, |
4813 | .set_cr = emulator_set_cr, | |
9c537244 | 4814 | .cpl = emulator_get_cpl, |
35aa5375 GN |
4815 | .get_dr = emulator_get_dr, |
4816 | .set_dr = emulator_set_dr, | |
64d60670 PB |
4817 | .get_smbase = emulator_get_smbase, |
4818 | .set_smbase = emulator_set_smbase, | |
717746e3 AK |
4819 | .set_msr = emulator_set_msr, |
4820 | .get_msr = emulator_get_msr, | |
67f4d428 | 4821 | .check_pmc = emulator_check_pmc, |
222d21aa | 4822 | .read_pmc = emulator_read_pmc, |
6c3287f7 | 4823 | .halt = emulator_halt, |
bcaf5cc5 | 4824 | .wbinvd = emulator_wbinvd, |
d6aa1000 | 4825 | .fix_hypercall = emulator_fix_hypercall, |
5037f6f3 AK |
4826 | .get_fpu = emulator_get_fpu, |
4827 | .put_fpu = emulator_put_fpu, | |
c4f035c6 | 4828 | .intercept = emulator_intercept, |
bdb42f5a | 4829 | .get_cpuid = emulator_get_cpuid, |
801806d9 | 4830 | .set_nmi_mask = emulator_set_nmi_mask, |
bbd9b64e CO |
4831 | }; |
4832 | ||
95cb2295 GN |
4833 | static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |
4834 | { | |
37ccdcbe | 4835 | u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu); |
95cb2295 GN |
4836 | /* |
4837 | * an sti; sti; sequence only disable interrupts for the first | |
4838 | * instruction. So, if the last instruction, be it emulated or | |
4839 | * not, left the system with the INT_STI flag enabled, it | |
4840 | * means that the last instruction is an sti. We should not | |
4841 | * leave the flag on in this case. The same goes for mov ss | |
4842 | */ | |
37ccdcbe PB |
4843 | if (int_shadow & mask) |
4844 | mask = 0; | |
6addfc42 | 4845 | if (unlikely(int_shadow || mask)) { |
95cb2295 | 4846 | kvm_x86_ops->set_interrupt_shadow(vcpu, mask); |
6addfc42 PB |
4847 | if (!mask) |
4848 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
4849 | } | |
95cb2295 GN |
4850 | } |
4851 | ||
ef54bcfe | 4852 | static bool inject_emulated_exception(struct kvm_vcpu *vcpu) |
54b8486f GN |
4853 | { |
4854 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; | |
da9cb575 | 4855 | if (ctxt->exception.vector == PF_VECTOR) |
ef54bcfe PB |
4856 | return kvm_propagate_fault(vcpu, &ctxt->exception); |
4857 | ||
4858 | if (ctxt->exception.error_code_valid) | |
da9cb575 AK |
4859 | kvm_queue_exception_e(vcpu, ctxt->exception.vector, |
4860 | ctxt->exception.error_code); | |
54b8486f | 4861 | else |
da9cb575 | 4862 | kvm_queue_exception(vcpu, ctxt->exception.vector); |
ef54bcfe | 4863 | return false; |
54b8486f GN |
4864 | } |
4865 | ||
8ec4722d MG |
4866 | static void init_emulate_ctxt(struct kvm_vcpu *vcpu) |
4867 | { | |
adf52235 | 4868 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d MG |
4869 | int cs_db, cs_l; |
4870 | ||
8ec4722d MG |
4871 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
4872 | ||
adf52235 TY |
4873 | ctxt->eflags = kvm_get_rflags(vcpu); |
4874 | ctxt->eip = kvm_rip_read(vcpu); | |
4875 | ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : | |
4876 | (ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 : | |
42bf549f | 4877 | (cs_l && is_long_mode(vcpu)) ? X86EMUL_MODE_PROT64 : |
adf52235 TY |
4878 | cs_db ? X86EMUL_MODE_PROT32 : |
4879 | X86EMUL_MODE_PROT16; | |
a584539b | 4880 | BUILD_BUG_ON(HF_GUEST_MASK != X86EMUL_GUEST_MASK); |
64d60670 PB |
4881 | BUILD_BUG_ON(HF_SMM_MASK != X86EMUL_SMM_MASK); |
4882 | BUILD_BUG_ON(HF_SMM_INSIDE_NMI_MASK != X86EMUL_SMM_INSIDE_NMI_MASK); | |
a584539b | 4883 | ctxt->emul_flags = vcpu->arch.hflags; |
adf52235 | 4884 | |
dd856efa | 4885 | init_decode_cache(ctxt); |
7ae441ea | 4886 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; |
8ec4722d MG |
4887 | } |
4888 | ||
71f9833b | 4889 | int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip) |
63995653 | 4890 | { |
9d74191a | 4891 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
63995653 MG |
4892 | int ret; |
4893 | ||
4894 | init_emulate_ctxt(vcpu); | |
4895 | ||
9dac77fa AK |
4896 | ctxt->op_bytes = 2; |
4897 | ctxt->ad_bytes = 2; | |
4898 | ctxt->_eip = ctxt->eip + inc_eip; | |
9d74191a | 4899 | ret = emulate_int_real(ctxt, irq); |
63995653 MG |
4900 | |
4901 | if (ret != X86EMUL_CONTINUE) | |
4902 | return EMULATE_FAIL; | |
4903 | ||
9dac77fa | 4904 | ctxt->eip = ctxt->_eip; |
9d74191a TY |
4905 | kvm_rip_write(vcpu, ctxt->eip); |
4906 | kvm_set_rflags(vcpu, ctxt->eflags); | |
63995653 MG |
4907 | |
4908 | if (irq == NMI_VECTOR) | |
7460fb4a | 4909 | vcpu->arch.nmi_pending = 0; |
63995653 MG |
4910 | else |
4911 | vcpu->arch.interrupt.pending = false; | |
4912 | ||
4913 | return EMULATE_DONE; | |
4914 | } | |
4915 | EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt); | |
4916 | ||
6d77dbfc GN |
4917 | static int handle_emulation_failure(struct kvm_vcpu *vcpu) |
4918 | { | |
fc3a9157 JR |
4919 | int r = EMULATE_DONE; |
4920 | ||
6d77dbfc GN |
4921 | ++vcpu->stat.insn_emulation_fail; |
4922 | trace_kvm_emulate_insn_failed(vcpu); | |
a2b9e6c1 | 4923 | if (!is_guest_mode(vcpu) && kvm_x86_ops->get_cpl(vcpu) == 0) { |
fc3a9157 JR |
4924 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
4925 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
4926 | vcpu->run->internal.ndata = 0; | |
4927 | r = EMULATE_FAIL; | |
4928 | } | |
6d77dbfc | 4929 | kvm_queue_exception(vcpu, UD_VECTOR); |
fc3a9157 JR |
4930 | |
4931 | return r; | |
6d77dbfc GN |
4932 | } |
4933 | ||
93c05d3e | 4934 | static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2, |
991eebf9 GN |
4935 | bool write_fault_to_shadow_pgtable, |
4936 | int emulation_type) | |
a6f177ef | 4937 | { |
95b3cf69 | 4938 | gpa_t gpa = cr2; |
8e3d9d06 | 4939 | pfn_t pfn; |
a6f177ef | 4940 | |
991eebf9 GN |
4941 | if (emulation_type & EMULTYPE_NO_REEXECUTE) |
4942 | return false; | |
4943 | ||
95b3cf69 XG |
4944 | if (!vcpu->arch.mmu.direct_map) { |
4945 | /* | |
4946 | * Write permission should be allowed since only | |
4947 | * write access need to be emulated. | |
4948 | */ | |
4949 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
a6f177ef | 4950 | |
95b3cf69 XG |
4951 | /* |
4952 | * If the mapping is invalid in guest, let cpu retry | |
4953 | * it to generate fault. | |
4954 | */ | |
4955 | if (gpa == UNMAPPED_GVA) | |
4956 | return true; | |
4957 | } | |
a6f177ef | 4958 | |
8e3d9d06 XG |
4959 | /* |
4960 | * Do not retry the unhandleable instruction if it faults on the | |
4961 | * readonly host memory, otherwise it will goto a infinite loop: | |
4962 | * retry instruction -> write #PF -> emulation fail -> retry | |
4963 | * instruction -> ... | |
4964 | */ | |
4965 | pfn = gfn_to_pfn(vcpu->kvm, gpa_to_gfn(gpa)); | |
95b3cf69 XG |
4966 | |
4967 | /* | |
4968 | * If the instruction failed on the error pfn, it can not be fixed, | |
4969 | * report the error to userspace. | |
4970 | */ | |
4971 | if (is_error_noslot_pfn(pfn)) | |
4972 | return false; | |
4973 | ||
4974 | kvm_release_pfn_clean(pfn); | |
4975 | ||
4976 | /* The instructions are well-emulated on direct mmu. */ | |
4977 | if (vcpu->arch.mmu.direct_map) { | |
4978 | unsigned int indirect_shadow_pages; | |
4979 | ||
4980 | spin_lock(&vcpu->kvm->mmu_lock); | |
4981 | indirect_shadow_pages = vcpu->kvm->arch.indirect_shadow_pages; | |
4982 | spin_unlock(&vcpu->kvm->mmu_lock); | |
4983 | ||
4984 | if (indirect_shadow_pages) | |
4985 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
4986 | ||
a6f177ef | 4987 | return true; |
8e3d9d06 | 4988 | } |
a6f177ef | 4989 | |
95b3cf69 XG |
4990 | /* |
4991 | * if emulation was due to access to shadowed page table | |
4992 | * and it failed try to unshadow page and re-enter the | |
4993 | * guest to let CPU execute the instruction. | |
4994 | */ | |
4995 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
93c05d3e XG |
4996 | |
4997 | /* | |
4998 | * If the access faults on its page table, it can not | |
4999 | * be fixed by unprotecting shadow page and it should | |
5000 | * be reported to userspace. | |
5001 | */ | |
5002 | return !write_fault_to_shadow_pgtable; | |
a6f177ef GN |
5003 | } |
5004 | ||
1cb3f3ae XG |
5005 | static bool retry_instruction(struct x86_emulate_ctxt *ctxt, |
5006 | unsigned long cr2, int emulation_type) | |
5007 | { | |
5008 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5009 | unsigned long last_retry_eip, last_retry_addr, gpa = cr2; | |
5010 | ||
5011 | last_retry_eip = vcpu->arch.last_retry_eip; | |
5012 | last_retry_addr = vcpu->arch.last_retry_addr; | |
5013 | ||
5014 | /* | |
5015 | * If the emulation is caused by #PF and it is non-page_table | |
5016 | * writing instruction, it means the VM-EXIT is caused by shadow | |
5017 | * page protected, we can zap the shadow page and retry this | |
5018 | * instruction directly. | |
5019 | * | |
5020 | * Note: if the guest uses a non-page-table modifying instruction | |
5021 | * on the PDE that points to the instruction, then we will unmap | |
5022 | * the instruction and go to an infinite loop. So, we cache the | |
5023 | * last retried eip and the last fault address, if we meet the eip | |
5024 | * and the address again, we can break out of the potential infinite | |
5025 | * loop. | |
5026 | */ | |
5027 | vcpu->arch.last_retry_eip = vcpu->arch.last_retry_addr = 0; | |
5028 | ||
5029 | if (!(emulation_type & EMULTYPE_RETRY)) | |
5030 | return false; | |
5031 | ||
5032 | if (x86_page_table_writing_insn(ctxt)) | |
5033 | return false; | |
5034 | ||
5035 | if (ctxt->eip == last_retry_eip && last_retry_addr == cr2) | |
5036 | return false; | |
5037 | ||
5038 | vcpu->arch.last_retry_eip = ctxt->eip; | |
5039 | vcpu->arch.last_retry_addr = cr2; | |
5040 | ||
5041 | if (!vcpu->arch.mmu.direct_map) | |
5042 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
5043 | ||
22368028 | 5044 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); |
1cb3f3ae XG |
5045 | |
5046 | return true; | |
5047 | } | |
5048 | ||
716d51ab GN |
5049 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu); |
5050 | static int complete_emulated_pio(struct kvm_vcpu *vcpu); | |
5051 | ||
64d60670 | 5052 | static void kvm_smm_changed(struct kvm_vcpu *vcpu) |
a584539b | 5053 | { |
64d60670 | 5054 | if (!(vcpu->arch.hflags & HF_SMM_MASK)) { |
660a5d51 PB |
5055 | /* This is a good place to trace that we are exiting SMM. */ |
5056 | trace_kvm_enter_smm(vcpu->vcpu_id, vcpu->arch.smbase, false); | |
5057 | ||
64d60670 PB |
5058 | if (unlikely(vcpu->arch.smi_pending)) { |
5059 | kvm_make_request(KVM_REQ_SMI, vcpu); | |
5060 | vcpu->arch.smi_pending = 0; | |
cd7764fe PB |
5061 | } else { |
5062 | /* Process a latched INIT, if any. */ | |
5063 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
64d60670 PB |
5064 | } |
5065 | } | |
699023e2 PB |
5066 | |
5067 | kvm_mmu_reset_context(vcpu); | |
64d60670 PB |
5068 | } |
5069 | ||
5070 | static void kvm_set_hflags(struct kvm_vcpu *vcpu, unsigned emul_flags) | |
5071 | { | |
5072 | unsigned changed = vcpu->arch.hflags ^ emul_flags; | |
5073 | ||
a584539b | 5074 | vcpu->arch.hflags = emul_flags; |
64d60670 PB |
5075 | |
5076 | if (changed & HF_SMM_MASK) | |
5077 | kvm_smm_changed(vcpu); | |
a584539b PB |
5078 | } |
5079 | ||
4a1e10d5 PB |
5080 | static int kvm_vcpu_check_hw_bp(unsigned long addr, u32 type, u32 dr7, |
5081 | unsigned long *db) | |
5082 | { | |
5083 | u32 dr6 = 0; | |
5084 | int i; | |
5085 | u32 enable, rwlen; | |
5086 | ||
5087 | enable = dr7; | |
5088 | rwlen = dr7 >> 16; | |
5089 | for (i = 0; i < 4; i++, enable >>= 2, rwlen >>= 4) | |
5090 | if ((enable & 3) && (rwlen & 15) == type && db[i] == addr) | |
5091 | dr6 |= (1 << i); | |
5092 | return dr6; | |
5093 | } | |
5094 | ||
6addfc42 | 5095 | static void kvm_vcpu_check_singlestep(struct kvm_vcpu *vcpu, unsigned long rflags, int *r) |
663f4c61 PB |
5096 | { |
5097 | struct kvm_run *kvm_run = vcpu->run; | |
5098 | ||
5099 | /* | |
6addfc42 PB |
5100 | * rflags is the old, "raw" value of the flags. The new value has |
5101 | * not been saved yet. | |
663f4c61 PB |
5102 | * |
5103 | * This is correct even for TF set by the guest, because "the | |
5104 | * processor will not generate this exception after the instruction | |
5105 | * that sets the TF flag". | |
5106 | */ | |
663f4c61 PB |
5107 | if (unlikely(rflags & X86_EFLAGS_TF)) { |
5108 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) { | |
6f43ed01 NA |
5109 | kvm_run->debug.arch.dr6 = DR6_BS | DR6_FIXED_1 | |
5110 | DR6_RTM; | |
663f4c61 PB |
5111 | kvm_run->debug.arch.pc = vcpu->arch.singlestep_rip; |
5112 | kvm_run->debug.arch.exception = DB_VECTOR; | |
5113 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
5114 | *r = EMULATE_USER_EXIT; | |
5115 | } else { | |
5116 | vcpu->arch.emulate_ctxt.eflags &= ~X86_EFLAGS_TF; | |
5117 | /* | |
5118 | * "Certain debug exceptions may clear bit 0-3. The | |
5119 | * remaining contents of the DR6 register are never | |
5120 | * cleared by the processor". | |
5121 | */ | |
5122 | vcpu->arch.dr6 &= ~15; | |
6f43ed01 | 5123 | vcpu->arch.dr6 |= DR6_BS | DR6_RTM; |
663f4c61 PB |
5124 | kvm_queue_exception(vcpu, DB_VECTOR); |
5125 | } | |
5126 | } | |
5127 | } | |
5128 | ||
4a1e10d5 PB |
5129 | static bool kvm_vcpu_check_breakpoint(struct kvm_vcpu *vcpu, int *r) |
5130 | { | |
4a1e10d5 PB |
5131 | if (unlikely(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) && |
5132 | (vcpu->arch.guest_debug_dr7 & DR7_BP_EN_MASK)) { | |
82b32774 NA |
5133 | struct kvm_run *kvm_run = vcpu->run; |
5134 | unsigned long eip = kvm_get_linear_rip(vcpu); | |
5135 | u32 dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
4a1e10d5 PB |
5136 | vcpu->arch.guest_debug_dr7, |
5137 | vcpu->arch.eff_db); | |
5138 | ||
5139 | if (dr6 != 0) { | |
6f43ed01 | 5140 | kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1 | DR6_RTM; |
82b32774 | 5141 | kvm_run->debug.arch.pc = eip; |
4a1e10d5 PB |
5142 | kvm_run->debug.arch.exception = DB_VECTOR; |
5143 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
5144 | *r = EMULATE_USER_EXIT; | |
5145 | return true; | |
5146 | } | |
5147 | } | |
5148 | ||
4161a569 NA |
5149 | if (unlikely(vcpu->arch.dr7 & DR7_BP_EN_MASK) && |
5150 | !(kvm_get_rflags(vcpu) & X86_EFLAGS_RF)) { | |
82b32774 NA |
5151 | unsigned long eip = kvm_get_linear_rip(vcpu); |
5152 | u32 dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
4a1e10d5 PB |
5153 | vcpu->arch.dr7, |
5154 | vcpu->arch.db); | |
5155 | ||
5156 | if (dr6 != 0) { | |
5157 | vcpu->arch.dr6 &= ~15; | |
6f43ed01 | 5158 | vcpu->arch.dr6 |= dr6 | DR6_RTM; |
4a1e10d5 PB |
5159 | kvm_queue_exception(vcpu, DB_VECTOR); |
5160 | *r = EMULATE_DONE; | |
5161 | return true; | |
5162 | } | |
5163 | } | |
5164 | ||
5165 | return false; | |
5166 | } | |
5167 | ||
51d8b661 AP |
5168 | int x86_emulate_instruction(struct kvm_vcpu *vcpu, |
5169 | unsigned long cr2, | |
dc25e89e AP |
5170 | int emulation_type, |
5171 | void *insn, | |
5172 | int insn_len) | |
bbd9b64e | 5173 | { |
95cb2295 | 5174 | int r; |
9d74191a | 5175 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
7ae441ea | 5176 | bool writeback = true; |
93c05d3e | 5177 | bool write_fault_to_spt = vcpu->arch.write_fault_to_shadow_pgtable; |
bbd9b64e | 5178 | |
93c05d3e XG |
5179 | /* |
5180 | * Clear write_fault_to_shadow_pgtable here to ensure it is | |
5181 | * never reused. | |
5182 | */ | |
5183 | vcpu->arch.write_fault_to_shadow_pgtable = false; | |
26eef70c | 5184 | kvm_clear_exception_queue(vcpu); |
8d7d8102 | 5185 | |
571008da | 5186 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
8ec4722d | 5187 | init_emulate_ctxt(vcpu); |
4a1e10d5 PB |
5188 | |
5189 | /* | |
5190 | * We will reenter on the same instruction since | |
5191 | * we do not set complete_userspace_io. This does not | |
5192 | * handle watchpoints yet, those would be handled in | |
5193 | * the emulate_ops. | |
5194 | */ | |
5195 | if (kvm_vcpu_check_breakpoint(vcpu, &r)) | |
5196 | return r; | |
5197 | ||
9d74191a TY |
5198 | ctxt->interruptibility = 0; |
5199 | ctxt->have_exception = false; | |
e0ad0b47 | 5200 | ctxt->exception.vector = -1; |
9d74191a | 5201 | ctxt->perm_ok = false; |
bbd9b64e | 5202 | |
b51e974f | 5203 | ctxt->ud = emulation_type & EMULTYPE_TRAP_UD; |
4005996e | 5204 | |
9d74191a | 5205 | r = x86_decode_insn(ctxt, insn, insn_len); |
bbd9b64e | 5206 | |
e46479f8 | 5207 | trace_kvm_emulate_insn_start(vcpu); |
f2b5756b | 5208 | ++vcpu->stat.insn_emulation; |
1d2887e2 | 5209 | if (r != EMULATION_OK) { |
4005996e AK |
5210 | if (emulation_type & EMULTYPE_TRAP_UD) |
5211 | return EMULATE_FAIL; | |
991eebf9 GN |
5212 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
5213 | emulation_type)) | |
bbd9b64e | 5214 | return EMULATE_DONE; |
6d77dbfc GN |
5215 | if (emulation_type & EMULTYPE_SKIP) |
5216 | return EMULATE_FAIL; | |
5217 | return handle_emulation_failure(vcpu); | |
bbd9b64e CO |
5218 | } |
5219 | } | |
5220 | ||
ba8afb6b | 5221 | if (emulation_type & EMULTYPE_SKIP) { |
9dac77fa | 5222 | kvm_rip_write(vcpu, ctxt->_eip); |
bb663c7a NA |
5223 | if (ctxt->eflags & X86_EFLAGS_RF) |
5224 | kvm_set_rflags(vcpu, ctxt->eflags & ~X86_EFLAGS_RF); | |
ba8afb6b GN |
5225 | return EMULATE_DONE; |
5226 | } | |
5227 | ||
1cb3f3ae XG |
5228 | if (retry_instruction(ctxt, cr2, emulation_type)) |
5229 | return EMULATE_DONE; | |
5230 | ||
7ae441ea | 5231 | /* this is needed for vmware backdoor interface to work since it |
4d2179e1 | 5232 | changes registers values during IO operation */ |
7ae441ea GN |
5233 | if (vcpu->arch.emulate_regs_need_sync_from_vcpu) { |
5234 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; | |
dd856efa | 5235 | emulator_invalidate_register_cache(ctxt); |
7ae441ea | 5236 | } |
4d2179e1 | 5237 | |
5cd21917 | 5238 | restart: |
9d74191a | 5239 | r = x86_emulate_insn(ctxt); |
bbd9b64e | 5240 | |
775fde86 JR |
5241 | if (r == EMULATION_INTERCEPTED) |
5242 | return EMULATE_DONE; | |
5243 | ||
d2ddd1c4 | 5244 | if (r == EMULATION_FAILED) { |
991eebf9 GN |
5245 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
5246 | emulation_type)) | |
c3cd7ffa GN |
5247 | return EMULATE_DONE; |
5248 | ||
6d77dbfc | 5249 | return handle_emulation_failure(vcpu); |
bbd9b64e CO |
5250 | } |
5251 | ||
9d74191a | 5252 | if (ctxt->have_exception) { |
d2ddd1c4 | 5253 | r = EMULATE_DONE; |
ef54bcfe PB |
5254 | if (inject_emulated_exception(vcpu)) |
5255 | return r; | |
d2ddd1c4 | 5256 | } else if (vcpu->arch.pio.count) { |
0912c977 PB |
5257 | if (!vcpu->arch.pio.in) { |
5258 | /* FIXME: return into emulator if single-stepping. */ | |
3457e419 | 5259 | vcpu->arch.pio.count = 0; |
0912c977 | 5260 | } else { |
7ae441ea | 5261 | writeback = false; |
716d51ab GN |
5262 | vcpu->arch.complete_userspace_io = complete_emulated_pio; |
5263 | } | |
ac0a48c3 | 5264 | r = EMULATE_USER_EXIT; |
7ae441ea GN |
5265 | } else if (vcpu->mmio_needed) { |
5266 | if (!vcpu->mmio_is_write) | |
5267 | writeback = false; | |
ac0a48c3 | 5268 | r = EMULATE_USER_EXIT; |
716d51ab | 5269 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; |
7ae441ea | 5270 | } else if (r == EMULATION_RESTART) |
5cd21917 | 5271 | goto restart; |
d2ddd1c4 GN |
5272 | else |
5273 | r = EMULATE_DONE; | |
f850e2e6 | 5274 | |
7ae441ea | 5275 | if (writeback) { |
6addfc42 | 5276 | unsigned long rflags = kvm_x86_ops->get_rflags(vcpu); |
9d74191a | 5277 | toggle_interruptibility(vcpu, ctxt->interruptibility); |
7ae441ea | 5278 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
a584539b PB |
5279 | if (vcpu->arch.hflags != ctxt->emul_flags) |
5280 | kvm_set_hflags(vcpu, ctxt->emul_flags); | |
9d74191a | 5281 | kvm_rip_write(vcpu, ctxt->eip); |
663f4c61 | 5282 | if (r == EMULATE_DONE) |
6addfc42 | 5283 | kvm_vcpu_check_singlestep(vcpu, rflags, &r); |
38827dbd NA |
5284 | if (!ctxt->have_exception || |
5285 | exception_type(ctxt->exception.vector) == EXCPT_TRAP) | |
5286 | __kvm_set_rflags(vcpu, ctxt->eflags); | |
6addfc42 PB |
5287 | |
5288 | /* | |
5289 | * For STI, interrupts are shadowed; so KVM_REQ_EVENT will | |
5290 | * do nothing, and it will be requested again as soon as | |
5291 | * the shadow expires. But we still need to check here, | |
5292 | * because POPF has no interrupt shadow. | |
5293 | */ | |
5294 | if (unlikely((ctxt->eflags & ~rflags) & X86_EFLAGS_IF)) | |
5295 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
7ae441ea GN |
5296 | } else |
5297 | vcpu->arch.emulate_regs_need_sync_to_vcpu = true; | |
e85d28f8 GN |
5298 | |
5299 | return r; | |
de7d789a | 5300 | } |
51d8b661 | 5301 | EXPORT_SYMBOL_GPL(x86_emulate_instruction); |
de7d789a | 5302 | |
cf8f70bf | 5303 | int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port) |
de7d789a | 5304 | { |
cf8f70bf | 5305 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
ca1d4a9e AK |
5306 | int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt, |
5307 | size, port, &val, 1); | |
cf8f70bf | 5308 | /* do not return to emulator after return from userspace */ |
7972995b | 5309 | vcpu->arch.pio.count = 0; |
de7d789a CO |
5310 | return ret; |
5311 | } | |
cf8f70bf | 5312 | EXPORT_SYMBOL_GPL(kvm_fast_pio_out); |
de7d789a | 5313 | |
8cfdc000 ZA |
5314 | static void tsc_bad(void *info) |
5315 | { | |
0a3aee0d | 5316 | __this_cpu_write(cpu_tsc_khz, 0); |
8cfdc000 ZA |
5317 | } |
5318 | ||
5319 | static void tsc_khz_changed(void *data) | |
c8076604 | 5320 | { |
8cfdc000 ZA |
5321 | struct cpufreq_freqs *freq = data; |
5322 | unsigned long khz = 0; | |
5323 | ||
5324 | if (data) | |
5325 | khz = freq->new; | |
5326 | else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) | |
5327 | khz = cpufreq_quick_get(raw_smp_processor_id()); | |
5328 | if (!khz) | |
5329 | khz = tsc_khz; | |
0a3aee0d | 5330 | __this_cpu_write(cpu_tsc_khz, khz); |
c8076604 GH |
5331 | } |
5332 | ||
c8076604 GH |
5333 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
5334 | void *data) | |
5335 | { | |
5336 | struct cpufreq_freqs *freq = data; | |
5337 | struct kvm *kvm; | |
5338 | struct kvm_vcpu *vcpu; | |
5339 | int i, send_ipi = 0; | |
5340 | ||
8cfdc000 ZA |
5341 | /* |
5342 | * We allow guests to temporarily run on slowing clocks, | |
5343 | * provided we notify them after, or to run on accelerating | |
5344 | * clocks, provided we notify them before. Thus time never | |
5345 | * goes backwards. | |
5346 | * | |
5347 | * However, we have a problem. We can't atomically update | |
5348 | * the frequency of a given CPU from this function; it is | |
5349 | * merely a notifier, which can be called from any CPU. | |
5350 | * Changing the TSC frequency at arbitrary points in time | |
5351 | * requires a recomputation of local variables related to | |
5352 | * the TSC for each VCPU. We must flag these local variables | |
5353 | * to be updated and be sure the update takes place with the | |
5354 | * new frequency before any guests proceed. | |
5355 | * | |
5356 | * Unfortunately, the combination of hotplug CPU and frequency | |
5357 | * change creates an intractable locking scenario; the order | |
5358 | * of when these callouts happen is undefined with respect to | |
5359 | * CPU hotplug, and they can race with each other. As such, | |
5360 | * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is | |
5361 | * undefined; you can actually have a CPU frequency change take | |
5362 | * place in between the computation of X and the setting of the | |
5363 | * variable. To protect against this problem, all updates of | |
5364 | * the per_cpu tsc_khz variable are done in an interrupt | |
5365 | * protected IPI, and all callers wishing to update the value | |
5366 | * must wait for a synchronous IPI to complete (which is trivial | |
5367 | * if the caller is on the CPU already). This establishes the | |
5368 | * necessary total order on variable updates. | |
5369 | * | |
5370 | * Note that because a guest time update may take place | |
5371 | * anytime after the setting of the VCPU's request bit, the | |
5372 | * correct TSC value must be set before the request. However, | |
5373 | * to ensure the update actually makes it to any guest which | |
5374 | * starts running in hardware virtualization between the set | |
5375 | * and the acquisition of the spinlock, we must also ping the | |
5376 | * CPU after setting the request bit. | |
5377 | * | |
5378 | */ | |
5379 | ||
c8076604 GH |
5380 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
5381 | return 0; | |
5382 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
5383 | return 0; | |
8cfdc000 ZA |
5384 | |
5385 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); | |
c8076604 | 5386 | |
2f303b74 | 5387 | spin_lock(&kvm_lock); |
c8076604 | 5388 | list_for_each_entry(kvm, &vm_list, vm_list) { |
988a2cae | 5389 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
5390 | if (vcpu->cpu != freq->cpu) |
5391 | continue; | |
c285545f | 5392 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
c8076604 | 5393 | if (vcpu->cpu != smp_processor_id()) |
8cfdc000 | 5394 | send_ipi = 1; |
c8076604 GH |
5395 | } |
5396 | } | |
2f303b74 | 5397 | spin_unlock(&kvm_lock); |
c8076604 GH |
5398 | |
5399 | if (freq->old < freq->new && send_ipi) { | |
5400 | /* | |
5401 | * We upscale the frequency. Must make the guest | |
5402 | * doesn't see old kvmclock values while running with | |
5403 | * the new frequency, otherwise we risk the guest sees | |
5404 | * time go backwards. | |
5405 | * | |
5406 | * In case we update the frequency for another cpu | |
5407 | * (which might be in guest context) send an interrupt | |
5408 | * to kick the cpu out of guest context. Next time | |
5409 | * guest context is entered kvmclock will be updated, | |
5410 | * so the guest will not see stale values. | |
5411 | */ | |
8cfdc000 | 5412 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); |
c8076604 GH |
5413 | } |
5414 | return 0; | |
5415 | } | |
5416 | ||
5417 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
8cfdc000 ZA |
5418 | .notifier_call = kvmclock_cpufreq_notifier |
5419 | }; | |
5420 | ||
5421 | static int kvmclock_cpu_notifier(struct notifier_block *nfb, | |
5422 | unsigned long action, void *hcpu) | |
5423 | { | |
5424 | unsigned int cpu = (unsigned long)hcpu; | |
5425 | ||
5426 | switch (action) { | |
5427 | case CPU_ONLINE: | |
5428 | case CPU_DOWN_FAILED: | |
5429 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
5430 | break; | |
5431 | case CPU_DOWN_PREPARE: | |
5432 | smp_call_function_single(cpu, tsc_bad, NULL, 1); | |
5433 | break; | |
5434 | } | |
5435 | return NOTIFY_OK; | |
5436 | } | |
5437 | ||
5438 | static struct notifier_block kvmclock_cpu_notifier_block = { | |
5439 | .notifier_call = kvmclock_cpu_notifier, | |
5440 | .priority = -INT_MAX | |
c8076604 GH |
5441 | }; |
5442 | ||
b820cc0c ZA |
5443 | static void kvm_timer_init(void) |
5444 | { | |
5445 | int cpu; | |
5446 | ||
c285545f | 5447 | max_tsc_khz = tsc_khz; |
460dd42e SB |
5448 | |
5449 | cpu_notifier_register_begin(); | |
b820cc0c | 5450 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
c285545f ZA |
5451 | #ifdef CONFIG_CPU_FREQ |
5452 | struct cpufreq_policy policy; | |
5453 | memset(&policy, 0, sizeof(policy)); | |
3e26f230 AK |
5454 | cpu = get_cpu(); |
5455 | cpufreq_get_policy(&policy, cpu); | |
c285545f ZA |
5456 | if (policy.cpuinfo.max_freq) |
5457 | max_tsc_khz = policy.cpuinfo.max_freq; | |
3e26f230 | 5458 | put_cpu(); |
c285545f | 5459 | #endif |
b820cc0c ZA |
5460 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
5461 | CPUFREQ_TRANSITION_NOTIFIER); | |
5462 | } | |
c285545f | 5463 | pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz); |
8cfdc000 ZA |
5464 | for_each_online_cpu(cpu) |
5465 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
460dd42e SB |
5466 | |
5467 | __register_hotcpu_notifier(&kvmclock_cpu_notifier_block); | |
5468 | cpu_notifier_register_done(); | |
5469 | ||
b820cc0c ZA |
5470 | } |
5471 | ||
ff9d07a0 ZY |
5472 | static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
5473 | ||
f5132b01 | 5474 | int kvm_is_in_guest(void) |
ff9d07a0 | 5475 | { |
086c9855 | 5476 | return __this_cpu_read(current_vcpu) != NULL; |
ff9d07a0 ZY |
5477 | } |
5478 | ||
5479 | static int kvm_is_user_mode(void) | |
5480 | { | |
5481 | int user_mode = 3; | |
dcf46b94 | 5482 | |
086c9855 AS |
5483 | if (__this_cpu_read(current_vcpu)) |
5484 | user_mode = kvm_x86_ops->get_cpl(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 5485 | |
ff9d07a0 ZY |
5486 | return user_mode != 0; |
5487 | } | |
5488 | ||
5489 | static unsigned long kvm_get_guest_ip(void) | |
5490 | { | |
5491 | unsigned long ip = 0; | |
dcf46b94 | 5492 | |
086c9855 AS |
5493 | if (__this_cpu_read(current_vcpu)) |
5494 | ip = kvm_rip_read(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 5495 | |
ff9d07a0 ZY |
5496 | return ip; |
5497 | } | |
5498 | ||
5499 | static struct perf_guest_info_callbacks kvm_guest_cbs = { | |
5500 | .is_in_guest = kvm_is_in_guest, | |
5501 | .is_user_mode = kvm_is_user_mode, | |
5502 | .get_guest_ip = kvm_get_guest_ip, | |
5503 | }; | |
5504 | ||
5505 | void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) | |
5506 | { | |
086c9855 | 5507 | __this_cpu_write(current_vcpu, vcpu); |
ff9d07a0 ZY |
5508 | } |
5509 | EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); | |
5510 | ||
5511 | void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) | |
5512 | { | |
086c9855 | 5513 | __this_cpu_write(current_vcpu, NULL); |
ff9d07a0 ZY |
5514 | } |
5515 | EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); | |
5516 | ||
ce88decf XG |
5517 | static void kvm_set_mmio_spte_mask(void) |
5518 | { | |
5519 | u64 mask; | |
5520 | int maxphyaddr = boot_cpu_data.x86_phys_bits; | |
5521 | ||
5522 | /* | |
5523 | * Set the reserved bits and the present bit of an paging-structure | |
5524 | * entry to generate page fault with PFER.RSV = 1. | |
5525 | */ | |
885032b9 | 5526 | /* Mask the reserved physical address bits. */ |
d1431483 | 5527 | mask = rsvd_bits(maxphyaddr, 51); |
885032b9 XG |
5528 | |
5529 | /* Bit 62 is always reserved for 32bit host. */ | |
5530 | mask |= 0x3ull << 62; | |
5531 | ||
5532 | /* Set the present bit. */ | |
ce88decf XG |
5533 | mask |= 1ull; |
5534 | ||
5535 | #ifdef CONFIG_X86_64 | |
5536 | /* | |
5537 | * If reserved bit is not supported, clear the present bit to disable | |
5538 | * mmio page fault. | |
5539 | */ | |
5540 | if (maxphyaddr == 52) | |
5541 | mask &= ~1ull; | |
5542 | #endif | |
5543 | ||
5544 | kvm_mmu_set_mmio_spte_mask(mask); | |
5545 | } | |
5546 | ||
16e8d74d MT |
5547 | #ifdef CONFIG_X86_64 |
5548 | static void pvclock_gtod_update_fn(struct work_struct *work) | |
5549 | { | |
d828199e MT |
5550 | struct kvm *kvm; |
5551 | ||
5552 | struct kvm_vcpu *vcpu; | |
5553 | int i; | |
5554 | ||
2f303b74 | 5555 | spin_lock(&kvm_lock); |
d828199e MT |
5556 | list_for_each_entry(kvm, &vm_list, vm_list) |
5557 | kvm_for_each_vcpu(i, vcpu, kvm) | |
105b21bb | 5558 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
d828199e | 5559 | atomic_set(&kvm_guest_has_master_clock, 0); |
2f303b74 | 5560 | spin_unlock(&kvm_lock); |
16e8d74d MT |
5561 | } |
5562 | ||
5563 | static DECLARE_WORK(pvclock_gtod_work, pvclock_gtod_update_fn); | |
5564 | ||
5565 | /* | |
5566 | * Notification about pvclock gtod data update. | |
5567 | */ | |
5568 | static int pvclock_gtod_notify(struct notifier_block *nb, unsigned long unused, | |
5569 | void *priv) | |
5570 | { | |
5571 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
5572 | struct timekeeper *tk = priv; | |
5573 | ||
5574 | update_pvclock_gtod(tk); | |
5575 | ||
5576 | /* disable master clock if host does not trust, or does not | |
5577 | * use, TSC clocksource | |
5578 | */ | |
5579 | if (gtod->clock.vclock_mode != VCLOCK_TSC && | |
5580 | atomic_read(&kvm_guest_has_master_clock) != 0) | |
5581 | queue_work(system_long_wq, &pvclock_gtod_work); | |
5582 | ||
5583 | return 0; | |
5584 | } | |
5585 | ||
5586 | static struct notifier_block pvclock_gtod_notifier = { | |
5587 | .notifier_call = pvclock_gtod_notify, | |
5588 | }; | |
5589 | #endif | |
5590 | ||
f8c16bba | 5591 | int kvm_arch_init(void *opaque) |
043405e1 | 5592 | { |
b820cc0c | 5593 | int r; |
6b61edf7 | 5594 | struct kvm_x86_ops *ops = opaque; |
f8c16bba | 5595 | |
f8c16bba ZX |
5596 | if (kvm_x86_ops) { |
5597 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
5598 | r = -EEXIST; |
5599 | goto out; | |
f8c16bba ZX |
5600 | } |
5601 | ||
5602 | if (!ops->cpu_has_kvm_support()) { | |
5603 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
5604 | r = -EOPNOTSUPP; |
5605 | goto out; | |
f8c16bba ZX |
5606 | } |
5607 | if (ops->disabled_by_bios()) { | |
5608 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
5609 | r = -EOPNOTSUPP; |
5610 | goto out; | |
f8c16bba ZX |
5611 | } |
5612 | ||
013f6a5d MT |
5613 | r = -ENOMEM; |
5614 | shared_msrs = alloc_percpu(struct kvm_shared_msrs); | |
5615 | if (!shared_msrs) { | |
5616 | printk(KERN_ERR "kvm: failed to allocate percpu kvm_shared_msrs\n"); | |
5617 | goto out; | |
5618 | } | |
5619 | ||
97db56ce AK |
5620 | r = kvm_mmu_module_init(); |
5621 | if (r) | |
013f6a5d | 5622 | goto out_free_percpu; |
97db56ce | 5623 | |
ce88decf | 5624 | kvm_set_mmio_spte_mask(); |
97db56ce | 5625 | |
f8c16bba | 5626 | kvm_x86_ops = ops; |
920c8377 | 5627 | |
7b52345e | 5628 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, |
4b12f0de | 5629 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
c8076604 | 5630 | |
b820cc0c | 5631 | kvm_timer_init(); |
c8076604 | 5632 | |
ff9d07a0 ZY |
5633 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
5634 | ||
2acf923e DC |
5635 | if (cpu_has_xsave) |
5636 | host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); | |
5637 | ||
c5cc421b | 5638 | kvm_lapic_init(); |
16e8d74d MT |
5639 | #ifdef CONFIG_X86_64 |
5640 | pvclock_gtod_register_notifier(&pvclock_gtod_notifier); | |
5641 | #endif | |
5642 | ||
f8c16bba | 5643 | return 0; |
56c6d28a | 5644 | |
013f6a5d MT |
5645 | out_free_percpu: |
5646 | free_percpu(shared_msrs); | |
56c6d28a | 5647 | out: |
56c6d28a | 5648 | return r; |
043405e1 | 5649 | } |
8776e519 | 5650 | |
f8c16bba ZX |
5651 | void kvm_arch_exit(void) |
5652 | { | |
ff9d07a0 ZY |
5653 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
5654 | ||
888d256e JK |
5655 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
5656 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
5657 | CPUFREQ_TRANSITION_NOTIFIER); | |
8cfdc000 | 5658 | unregister_hotcpu_notifier(&kvmclock_cpu_notifier_block); |
16e8d74d MT |
5659 | #ifdef CONFIG_X86_64 |
5660 | pvclock_gtod_unregister_notifier(&pvclock_gtod_notifier); | |
5661 | #endif | |
f8c16bba | 5662 | kvm_x86_ops = NULL; |
56c6d28a | 5663 | kvm_mmu_module_exit(); |
013f6a5d | 5664 | free_percpu(shared_msrs); |
56c6d28a | 5665 | } |
f8c16bba | 5666 | |
5cb56059 | 5667 | int kvm_vcpu_halt(struct kvm_vcpu *vcpu) |
8776e519 HB |
5668 | { |
5669 | ++vcpu->stat.halt_exits; | |
5670 | if (irqchip_in_kernel(vcpu->kvm)) { | |
a4535290 | 5671 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
5672 | return 1; |
5673 | } else { | |
5674 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
5675 | return 0; | |
5676 | } | |
5677 | } | |
5cb56059 JS |
5678 | EXPORT_SYMBOL_GPL(kvm_vcpu_halt); |
5679 | ||
5680 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) | |
5681 | { | |
5682 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
5683 | return kvm_vcpu_halt(vcpu); | |
5684 | } | |
8776e519 HB |
5685 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); |
5686 | ||
6aef266c SV |
5687 | /* |
5688 | * kvm_pv_kick_cpu_op: Kick a vcpu. | |
5689 | * | |
5690 | * @apicid - apicid of vcpu to be kicked. | |
5691 | */ | |
5692 | static void kvm_pv_kick_cpu_op(struct kvm *kvm, unsigned long flags, int apicid) | |
5693 | { | |
24d2166b | 5694 | struct kvm_lapic_irq lapic_irq; |
6aef266c | 5695 | |
24d2166b R |
5696 | lapic_irq.shorthand = 0; |
5697 | lapic_irq.dest_mode = 0; | |
5698 | lapic_irq.dest_id = apicid; | |
93bbf0b8 | 5699 | lapic_irq.msi_redir_hint = false; |
6aef266c | 5700 | |
24d2166b | 5701 | lapic_irq.delivery_mode = APIC_DM_REMRD; |
795a149e | 5702 | kvm_irq_delivery_to_apic(kvm, NULL, &lapic_irq, NULL); |
6aef266c SV |
5703 | } |
5704 | ||
8776e519 HB |
5705 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
5706 | { | |
5707 | unsigned long nr, a0, a1, a2, a3, ret; | |
a449c7aa | 5708 | int op_64_bit, r = 1; |
8776e519 | 5709 | |
5cb56059 JS |
5710 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
5711 | ||
55cd8e5a GN |
5712 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
5713 | return kvm_hv_hypercall(vcpu); | |
5714 | ||
5fdbf976 MT |
5715 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
5716 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
5717 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5718 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
5719 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 5720 | |
229456fc | 5721 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 5722 | |
a449c7aa NA |
5723 | op_64_bit = is_64_bit_mode(vcpu); |
5724 | if (!op_64_bit) { | |
8776e519 HB |
5725 | nr &= 0xFFFFFFFF; |
5726 | a0 &= 0xFFFFFFFF; | |
5727 | a1 &= 0xFFFFFFFF; | |
5728 | a2 &= 0xFFFFFFFF; | |
5729 | a3 &= 0xFFFFFFFF; | |
5730 | } | |
5731 | ||
07708c4a JK |
5732 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
5733 | ret = -KVM_EPERM; | |
5734 | goto out; | |
5735 | } | |
5736 | ||
8776e519 | 5737 | switch (nr) { |
b93463aa AK |
5738 | case KVM_HC_VAPIC_POLL_IRQ: |
5739 | ret = 0; | |
5740 | break; | |
6aef266c SV |
5741 | case KVM_HC_KICK_CPU: |
5742 | kvm_pv_kick_cpu_op(vcpu->kvm, a0, a1); | |
5743 | ret = 0; | |
5744 | break; | |
8776e519 HB |
5745 | default: |
5746 | ret = -KVM_ENOSYS; | |
5747 | break; | |
5748 | } | |
07708c4a | 5749 | out: |
a449c7aa NA |
5750 | if (!op_64_bit) |
5751 | ret = (u32)ret; | |
5fdbf976 | 5752 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 5753 | ++vcpu->stat.hypercalls; |
2f333bcb | 5754 | return r; |
8776e519 HB |
5755 | } |
5756 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
5757 | ||
b6785def | 5758 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) |
8776e519 | 5759 | { |
d6aa1000 | 5760 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
8776e519 | 5761 | char instruction[3]; |
5fdbf976 | 5762 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 5763 | |
8776e519 | 5764 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 5765 | |
9d74191a | 5766 | return emulator_write_emulated(ctxt, rip, instruction, 3, NULL); |
8776e519 HB |
5767 | } |
5768 | ||
b6c7a5dc HB |
5769 | /* |
5770 | * Check if userspace requested an interrupt window, and that the | |
5771 | * interrupt window is open. | |
5772 | * | |
5773 | * No need to exit to userspace if we already have an interrupt queued. | |
5774 | */ | |
851ba692 | 5775 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 5776 | { |
8061823a | 5777 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
851ba692 | 5778 | vcpu->run->request_interrupt_window && |
5df56646 | 5779 | kvm_arch_interrupt_allowed(vcpu)); |
b6c7a5dc HB |
5780 | } |
5781 | ||
851ba692 | 5782 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 5783 | { |
851ba692 AK |
5784 | struct kvm_run *kvm_run = vcpu->run; |
5785 | ||
91586a3b | 5786 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
f077825a | 5787 | kvm_run->flags = is_smm(vcpu) ? KVM_RUN_X86_SMM : 0; |
2d3ad1f4 | 5788 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 5789 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
4531220b | 5790 | if (irqchip_in_kernel(vcpu->kvm)) |
b6c7a5dc | 5791 | kvm_run->ready_for_interrupt_injection = 1; |
4531220b | 5792 | else |
b6c7a5dc | 5793 | kvm_run->ready_for_interrupt_injection = |
fa9726b0 GN |
5794 | kvm_arch_interrupt_allowed(vcpu) && |
5795 | !kvm_cpu_has_interrupt(vcpu) && | |
5796 | !kvm_event_needs_reinjection(vcpu); | |
b6c7a5dc HB |
5797 | } |
5798 | ||
95ba8273 GN |
5799 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
5800 | { | |
5801 | int max_irr, tpr; | |
5802 | ||
5803 | if (!kvm_x86_ops->update_cr8_intercept) | |
5804 | return; | |
5805 | ||
88c808fd AK |
5806 | if (!vcpu->arch.apic) |
5807 | return; | |
5808 | ||
8db3baa2 GN |
5809 | if (!vcpu->arch.apic->vapic_addr) |
5810 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
5811 | else | |
5812 | max_irr = -1; | |
95ba8273 GN |
5813 | |
5814 | if (max_irr != -1) | |
5815 | max_irr >>= 4; | |
5816 | ||
5817 | tpr = kvm_lapic_get_cr8(vcpu); | |
5818 | ||
5819 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
5820 | } | |
5821 | ||
b6b8a145 | 5822 | static int inject_pending_event(struct kvm_vcpu *vcpu, bool req_int_win) |
95ba8273 | 5823 | { |
b6b8a145 JK |
5824 | int r; |
5825 | ||
95ba8273 | 5826 | /* try to reinject previous events if any */ |
b59bb7bd | 5827 | if (vcpu->arch.exception.pending) { |
5c1c85d0 AK |
5828 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
5829 | vcpu->arch.exception.has_error_code, | |
5830 | vcpu->arch.exception.error_code); | |
d6e8c854 NA |
5831 | |
5832 | if (exception_type(vcpu->arch.exception.nr) == EXCPT_FAULT) | |
5833 | __kvm_set_rflags(vcpu, kvm_get_rflags(vcpu) | | |
5834 | X86_EFLAGS_RF); | |
5835 | ||
6bdf0662 NA |
5836 | if (vcpu->arch.exception.nr == DB_VECTOR && |
5837 | (vcpu->arch.dr7 & DR7_GD)) { | |
5838 | vcpu->arch.dr7 &= ~DR7_GD; | |
5839 | kvm_update_dr7(vcpu); | |
5840 | } | |
5841 | ||
b59bb7bd GN |
5842 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
5843 | vcpu->arch.exception.has_error_code, | |
ce7ddec4 JR |
5844 | vcpu->arch.exception.error_code, |
5845 | vcpu->arch.exception.reinject); | |
b6b8a145 | 5846 | return 0; |
b59bb7bd GN |
5847 | } |
5848 | ||
95ba8273 GN |
5849 | if (vcpu->arch.nmi_injected) { |
5850 | kvm_x86_ops->set_nmi(vcpu); | |
b6b8a145 | 5851 | return 0; |
95ba8273 GN |
5852 | } |
5853 | ||
5854 | if (vcpu->arch.interrupt.pending) { | |
66fd3f7f | 5855 | kvm_x86_ops->set_irq(vcpu); |
b6b8a145 JK |
5856 | return 0; |
5857 | } | |
5858 | ||
5859 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { | |
5860 | r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); | |
5861 | if (r != 0) | |
5862 | return r; | |
95ba8273 GN |
5863 | } |
5864 | ||
5865 | /* try to inject new event if pending */ | |
5866 | if (vcpu->arch.nmi_pending) { | |
5867 | if (kvm_x86_ops->nmi_allowed(vcpu)) { | |
7460fb4a | 5868 | --vcpu->arch.nmi_pending; |
95ba8273 GN |
5869 | vcpu->arch.nmi_injected = true; |
5870 | kvm_x86_ops->set_nmi(vcpu); | |
5871 | } | |
c7c9c56c | 5872 | } else if (kvm_cpu_has_injectable_intr(vcpu)) { |
9242b5b6 BD |
5873 | /* |
5874 | * Because interrupts can be injected asynchronously, we are | |
5875 | * calling check_nested_events again here to avoid a race condition. | |
5876 | * See https://lkml.org/lkml/2014/7/2/60 for discussion about this | |
5877 | * proposal and current concerns. Perhaps we should be setting | |
5878 | * KVM_REQ_EVENT only on certain events and not unconditionally? | |
5879 | */ | |
5880 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { | |
5881 | r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); | |
5882 | if (r != 0) | |
5883 | return r; | |
5884 | } | |
95ba8273 | 5885 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { |
66fd3f7f GN |
5886 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
5887 | false); | |
5888 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
5889 | } |
5890 | } | |
b6b8a145 | 5891 | return 0; |
95ba8273 GN |
5892 | } |
5893 | ||
7460fb4a AK |
5894 | static void process_nmi(struct kvm_vcpu *vcpu) |
5895 | { | |
5896 | unsigned limit = 2; | |
5897 | ||
5898 | /* | |
5899 | * x86 is limited to one NMI running, and one NMI pending after it. | |
5900 | * If an NMI is already in progress, limit further NMIs to just one. | |
5901 | * Otherwise, allow two (and we'll inject the first one immediately). | |
5902 | */ | |
5903 | if (kvm_x86_ops->get_nmi_mask(vcpu) || vcpu->arch.nmi_injected) | |
5904 | limit = 1; | |
5905 | ||
5906 | vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0); | |
5907 | vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit); | |
5908 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
5909 | } | |
5910 | ||
660a5d51 PB |
5911 | #define put_smstate(type, buf, offset, val) \ |
5912 | *(type *)((buf) + (offset) - 0x7e00) = val | |
5913 | ||
5914 | static u32 process_smi_get_segment_flags(struct kvm_segment *seg) | |
5915 | { | |
5916 | u32 flags = 0; | |
5917 | flags |= seg->g << 23; | |
5918 | flags |= seg->db << 22; | |
5919 | flags |= seg->l << 21; | |
5920 | flags |= seg->avl << 20; | |
5921 | flags |= seg->present << 15; | |
5922 | flags |= seg->dpl << 13; | |
5923 | flags |= seg->s << 12; | |
5924 | flags |= seg->type << 8; | |
5925 | return flags; | |
5926 | } | |
5927 | ||
5928 | static void process_smi_save_seg_32(struct kvm_vcpu *vcpu, char *buf, int n) | |
5929 | { | |
5930 | struct kvm_segment seg; | |
5931 | int offset; | |
5932 | ||
5933 | kvm_get_segment(vcpu, &seg, n); | |
5934 | put_smstate(u32, buf, 0x7fa8 + n * 4, seg.selector); | |
5935 | ||
5936 | if (n < 3) | |
5937 | offset = 0x7f84 + n * 12; | |
5938 | else | |
5939 | offset = 0x7f2c + (n - 3) * 12; | |
5940 | ||
5941 | put_smstate(u32, buf, offset + 8, seg.base); | |
5942 | put_smstate(u32, buf, offset + 4, seg.limit); | |
5943 | put_smstate(u32, buf, offset, process_smi_get_segment_flags(&seg)); | |
5944 | } | |
5945 | ||
efbb288a | 5946 | #ifdef CONFIG_X86_64 |
660a5d51 PB |
5947 | static void process_smi_save_seg_64(struct kvm_vcpu *vcpu, char *buf, int n) |
5948 | { | |
5949 | struct kvm_segment seg; | |
5950 | int offset; | |
5951 | u16 flags; | |
5952 | ||
5953 | kvm_get_segment(vcpu, &seg, n); | |
5954 | offset = 0x7e00 + n * 16; | |
5955 | ||
5956 | flags = process_smi_get_segment_flags(&seg) >> 8; | |
5957 | put_smstate(u16, buf, offset, seg.selector); | |
5958 | put_smstate(u16, buf, offset + 2, flags); | |
5959 | put_smstate(u32, buf, offset + 4, seg.limit); | |
5960 | put_smstate(u64, buf, offset + 8, seg.base); | |
5961 | } | |
efbb288a | 5962 | #endif |
660a5d51 PB |
5963 | |
5964 | static void process_smi_save_state_32(struct kvm_vcpu *vcpu, char *buf) | |
5965 | { | |
5966 | struct desc_ptr dt; | |
5967 | struct kvm_segment seg; | |
5968 | unsigned long val; | |
5969 | int i; | |
5970 | ||
5971 | put_smstate(u32, buf, 0x7ffc, kvm_read_cr0(vcpu)); | |
5972 | put_smstate(u32, buf, 0x7ff8, kvm_read_cr3(vcpu)); | |
5973 | put_smstate(u32, buf, 0x7ff4, kvm_get_rflags(vcpu)); | |
5974 | put_smstate(u32, buf, 0x7ff0, kvm_rip_read(vcpu)); | |
5975 | ||
5976 | for (i = 0; i < 8; i++) | |
5977 | put_smstate(u32, buf, 0x7fd0 + i * 4, kvm_register_read(vcpu, i)); | |
5978 | ||
5979 | kvm_get_dr(vcpu, 6, &val); | |
5980 | put_smstate(u32, buf, 0x7fcc, (u32)val); | |
5981 | kvm_get_dr(vcpu, 7, &val); | |
5982 | put_smstate(u32, buf, 0x7fc8, (u32)val); | |
5983 | ||
5984 | kvm_get_segment(vcpu, &seg, VCPU_SREG_TR); | |
5985 | put_smstate(u32, buf, 0x7fc4, seg.selector); | |
5986 | put_smstate(u32, buf, 0x7f64, seg.base); | |
5987 | put_smstate(u32, buf, 0x7f60, seg.limit); | |
5988 | put_smstate(u32, buf, 0x7f5c, process_smi_get_segment_flags(&seg)); | |
5989 | ||
5990 | kvm_get_segment(vcpu, &seg, VCPU_SREG_LDTR); | |
5991 | put_smstate(u32, buf, 0x7fc0, seg.selector); | |
5992 | put_smstate(u32, buf, 0x7f80, seg.base); | |
5993 | put_smstate(u32, buf, 0x7f7c, seg.limit); | |
5994 | put_smstate(u32, buf, 0x7f78, process_smi_get_segment_flags(&seg)); | |
5995 | ||
5996 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
5997 | put_smstate(u32, buf, 0x7f74, dt.address); | |
5998 | put_smstate(u32, buf, 0x7f70, dt.size); | |
5999 | ||
6000 | kvm_x86_ops->get_idt(vcpu, &dt); | |
6001 | put_smstate(u32, buf, 0x7f58, dt.address); | |
6002 | put_smstate(u32, buf, 0x7f54, dt.size); | |
6003 | ||
6004 | for (i = 0; i < 6; i++) | |
6005 | process_smi_save_seg_32(vcpu, buf, i); | |
6006 | ||
6007 | put_smstate(u32, buf, 0x7f14, kvm_read_cr4(vcpu)); | |
6008 | ||
6009 | /* revision id */ | |
6010 | put_smstate(u32, buf, 0x7efc, 0x00020000); | |
6011 | put_smstate(u32, buf, 0x7ef8, vcpu->arch.smbase); | |
6012 | } | |
6013 | ||
6014 | static void process_smi_save_state_64(struct kvm_vcpu *vcpu, char *buf) | |
6015 | { | |
6016 | #ifdef CONFIG_X86_64 | |
6017 | struct desc_ptr dt; | |
6018 | struct kvm_segment seg; | |
6019 | unsigned long val; | |
6020 | int i; | |
6021 | ||
6022 | for (i = 0; i < 16; i++) | |
6023 | put_smstate(u64, buf, 0x7ff8 - i * 8, kvm_register_read(vcpu, i)); | |
6024 | ||
6025 | put_smstate(u64, buf, 0x7f78, kvm_rip_read(vcpu)); | |
6026 | put_smstate(u32, buf, 0x7f70, kvm_get_rflags(vcpu)); | |
6027 | ||
6028 | kvm_get_dr(vcpu, 6, &val); | |
6029 | put_smstate(u64, buf, 0x7f68, val); | |
6030 | kvm_get_dr(vcpu, 7, &val); | |
6031 | put_smstate(u64, buf, 0x7f60, val); | |
6032 | ||
6033 | put_smstate(u64, buf, 0x7f58, kvm_read_cr0(vcpu)); | |
6034 | put_smstate(u64, buf, 0x7f50, kvm_read_cr3(vcpu)); | |
6035 | put_smstate(u64, buf, 0x7f48, kvm_read_cr4(vcpu)); | |
6036 | ||
6037 | put_smstate(u32, buf, 0x7f00, vcpu->arch.smbase); | |
6038 | ||
6039 | /* revision id */ | |
6040 | put_smstate(u32, buf, 0x7efc, 0x00020064); | |
6041 | ||
6042 | put_smstate(u64, buf, 0x7ed0, vcpu->arch.efer); | |
6043 | ||
6044 | kvm_get_segment(vcpu, &seg, VCPU_SREG_TR); | |
6045 | put_smstate(u16, buf, 0x7e90, seg.selector); | |
6046 | put_smstate(u16, buf, 0x7e92, process_smi_get_segment_flags(&seg) >> 8); | |
6047 | put_smstate(u32, buf, 0x7e94, seg.limit); | |
6048 | put_smstate(u64, buf, 0x7e98, seg.base); | |
6049 | ||
6050 | kvm_x86_ops->get_idt(vcpu, &dt); | |
6051 | put_smstate(u32, buf, 0x7e84, dt.size); | |
6052 | put_smstate(u64, buf, 0x7e88, dt.address); | |
6053 | ||
6054 | kvm_get_segment(vcpu, &seg, VCPU_SREG_LDTR); | |
6055 | put_smstate(u16, buf, 0x7e70, seg.selector); | |
6056 | put_smstate(u16, buf, 0x7e72, process_smi_get_segment_flags(&seg) >> 8); | |
6057 | put_smstate(u32, buf, 0x7e74, seg.limit); | |
6058 | put_smstate(u64, buf, 0x7e78, seg.base); | |
6059 | ||
6060 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
6061 | put_smstate(u32, buf, 0x7e64, dt.size); | |
6062 | put_smstate(u64, buf, 0x7e68, dt.address); | |
6063 | ||
6064 | for (i = 0; i < 6; i++) | |
6065 | process_smi_save_seg_64(vcpu, buf, i); | |
6066 | #else | |
6067 | WARN_ON_ONCE(1); | |
6068 | #endif | |
6069 | } | |
6070 | ||
64d60670 PB |
6071 | static void process_smi(struct kvm_vcpu *vcpu) |
6072 | { | |
660a5d51 | 6073 | struct kvm_segment cs, ds; |
18c3626e | 6074 | struct desc_ptr dt; |
660a5d51 PB |
6075 | char buf[512]; |
6076 | u32 cr0; | |
6077 | ||
64d60670 PB |
6078 | if (is_smm(vcpu)) { |
6079 | vcpu->arch.smi_pending = true; | |
6080 | return; | |
6081 | } | |
6082 | ||
660a5d51 PB |
6083 | trace_kvm_enter_smm(vcpu->vcpu_id, vcpu->arch.smbase, true); |
6084 | vcpu->arch.hflags |= HF_SMM_MASK; | |
6085 | memset(buf, 0, 512); | |
6086 | if (guest_cpuid_has_longmode(vcpu)) | |
6087 | process_smi_save_state_64(vcpu, buf); | |
6088 | else | |
6089 | process_smi_save_state_32(vcpu, buf); | |
6090 | ||
54bf36aa | 6091 | kvm_vcpu_write_guest(vcpu, vcpu->arch.smbase + 0xfe00, buf, sizeof(buf)); |
660a5d51 PB |
6092 | |
6093 | if (kvm_x86_ops->get_nmi_mask(vcpu)) | |
6094 | vcpu->arch.hflags |= HF_SMM_INSIDE_NMI_MASK; | |
6095 | else | |
6096 | kvm_x86_ops->set_nmi_mask(vcpu, true); | |
6097 | ||
6098 | kvm_set_rflags(vcpu, X86_EFLAGS_FIXED); | |
6099 | kvm_rip_write(vcpu, 0x8000); | |
6100 | ||
6101 | cr0 = vcpu->arch.cr0 & ~(X86_CR0_PE | X86_CR0_EM | X86_CR0_TS | X86_CR0_PG); | |
6102 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
6103 | vcpu->arch.cr0 = cr0; | |
6104 | ||
6105 | kvm_x86_ops->set_cr4(vcpu, 0); | |
6106 | ||
18c3626e PB |
6107 | /* Undocumented: IDT limit is set to zero on entry to SMM. */ |
6108 | dt.address = dt.size = 0; | |
6109 | kvm_x86_ops->set_idt(vcpu, &dt); | |
6110 | ||
660a5d51 PB |
6111 | __kvm_set_dr(vcpu, 7, DR7_FIXED_1); |
6112 | ||
6113 | cs.selector = (vcpu->arch.smbase >> 4) & 0xffff; | |
6114 | cs.base = vcpu->arch.smbase; | |
6115 | ||
6116 | ds.selector = 0; | |
6117 | ds.base = 0; | |
6118 | ||
6119 | cs.limit = ds.limit = 0xffffffff; | |
6120 | cs.type = ds.type = 0x3; | |
6121 | cs.dpl = ds.dpl = 0; | |
6122 | cs.db = ds.db = 0; | |
6123 | cs.s = ds.s = 1; | |
6124 | cs.l = ds.l = 0; | |
6125 | cs.g = ds.g = 1; | |
6126 | cs.avl = ds.avl = 0; | |
6127 | cs.present = ds.present = 1; | |
6128 | cs.unusable = ds.unusable = 0; | |
6129 | cs.padding = ds.padding = 0; | |
6130 | ||
6131 | kvm_set_segment(vcpu, &cs, VCPU_SREG_CS); | |
6132 | kvm_set_segment(vcpu, &ds, VCPU_SREG_DS); | |
6133 | kvm_set_segment(vcpu, &ds, VCPU_SREG_ES); | |
6134 | kvm_set_segment(vcpu, &ds, VCPU_SREG_FS); | |
6135 | kvm_set_segment(vcpu, &ds, VCPU_SREG_GS); | |
6136 | kvm_set_segment(vcpu, &ds, VCPU_SREG_SS); | |
6137 | ||
6138 | if (guest_cpuid_has_longmode(vcpu)) | |
6139 | kvm_x86_ops->set_efer(vcpu, 0); | |
6140 | ||
6141 | kvm_update_cpuid(vcpu); | |
6142 | kvm_mmu_reset_context(vcpu); | |
64d60670 PB |
6143 | } |
6144 | ||
3d81bc7e | 6145 | static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu) |
c7c9c56c YZ |
6146 | { |
6147 | u64 eoi_exit_bitmap[4]; | |
cf9e65b7 | 6148 | u32 tmr[8]; |
c7c9c56c | 6149 | |
3d81bc7e YZ |
6150 | if (!kvm_apic_hw_enabled(vcpu->arch.apic)) |
6151 | return; | |
c7c9c56c YZ |
6152 | |
6153 | memset(eoi_exit_bitmap, 0, 32); | |
cf9e65b7 | 6154 | memset(tmr, 0, 32); |
c7c9c56c | 6155 | |
cf9e65b7 | 6156 | kvm_ioapic_scan_entry(vcpu, eoi_exit_bitmap, tmr); |
c7c9c56c | 6157 | kvm_x86_ops->load_eoi_exitmap(vcpu, eoi_exit_bitmap); |
cf9e65b7 | 6158 | kvm_apic_update_tmr(vcpu, tmr); |
c7c9c56c YZ |
6159 | } |
6160 | ||
a70656b6 RK |
6161 | static void kvm_vcpu_flush_tlb(struct kvm_vcpu *vcpu) |
6162 | { | |
6163 | ++vcpu->stat.tlb_flush; | |
6164 | kvm_x86_ops->tlb_flush(vcpu); | |
6165 | } | |
6166 | ||
4256f43f TC |
6167 | void kvm_vcpu_reload_apic_access_page(struct kvm_vcpu *vcpu) |
6168 | { | |
c24ae0dc TC |
6169 | struct page *page = NULL; |
6170 | ||
f439ed27 PB |
6171 | if (!irqchip_in_kernel(vcpu->kvm)) |
6172 | return; | |
6173 | ||
4256f43f TC |
6174 | if (!kvm_x86_ops->set_apic_access_page_addr) |
6175 | return; | |
6176 | ||
c24ae0dc | 6177 | page = gfn_to_page(vcpu->kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT); |
e8fd5e9e AA |
6178 | if (is_error_page(page)) |
6179 | return; | |
c24ae0dc TC |
6180 | kvm_x86_ops->set_apic_access_page_addr(vcpu, page_to_phys(page)); |
6181 | ||
6182 | /* | |
6183 | * Do not pin apic access page in memory, the MMU notifier | |
6184 | * will call us again if it is migrated or swapped out. | |
6185 | */ | |
6186 | put_page(page); | |
4256f43f TC |
6187 | } |
6188 | EXPORT_SYMBOL_GPL(kvm_vcpu_reload_apic_access_page); | |
6189 | ||
fe71557a TC |
6190 | void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm, |
6191 | unsigned long address) | |
6192 | { | |
c24ae0dc TC |
6193 | /* |
6194 | * The physical address of apic access page is stored in the VMCS. | |
6195 | * Update it when it becomes invalid. | |
6196 | */ | |
6197 | if (address == gfn_to_hva(kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT)) | |
6198 | kvm_make_all_cpus_request(kvm, KVM_REQ_APIC_PAGE_RELOAD); | |
fe71557a TC |
6199 | } |
6200 | ||
9357d939 | 6201 | /* |
362c698f | 6202 | * Returns 1 to let vcpu_run() continue the guest execution loop without |
9357d939 TY |
6203 | * exiting to the userspace. Otherwise, the value will be returned to the |
6204 | * userspace. | |
6205 | */ | |
851ba692 | 6206 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
6207 | { |
6208 | int r; | |
6a8b1d13 | 6209 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 6210 | vcpu->run->request_interrupt_window; |
730dca42 | 6211 | bool req_immediate_exit = false; |
b6c7a5dc | 6212 | |
3e007509 | 6213 | if (vcpu->requests) { |
a8eeb04a | 6214 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) |
2e53d63a | 6215 | kvm_mmu_unload(vcpu); |
a8eeb04a | 6216 | if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu)) |
2f599714 | 6217 | __kvm_migrate_timers(vcpu); |
d828199e MT |
6218 | if (kvm_check_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu)) |
6219 | kvm_gen_update_masterclock(vcpu->kvm); | |
0061d53d MT |
6220 | if (kvm_check_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu)) |
6221 | kvm_gen_kvmclock_update(vcpu); | |
34c238a1 ZA |
6222 | if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) { |
6223 | r = kvm_guest_time_update(vcpu); | |
8cfdc000 ZA |
6224 | if (unlikely(r)) |
6225 | goto out; | |
6226 | } | |
a8eeb04a | 6227 | if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu)) |
4731d4c7 | 6228 | kvm_mmu_sync_roots(vcpu); |
a8eeb04a | 6229 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) |
a70656b6 | 6230 | kvm_vcpu_flush_tlb(vcpu); |
a8eeb04a | 6231 | if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) { |
851ba692 | 6232 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
6233 | r = 0; |
6234 | goto out; | |
6235 | } | |
a8eeb04a | 6236 | if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) { |
851ba692 | 6237 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
71c4dfaf JR |
6238 | r = 0; |
6239 | goto out; | |
6240 | } | |
a8eeb04a | 6241 | if (kvm_check_request(KVM_REQ_DEACTIVATE_FPU, vcpu)) { |
02daab21 AK |
6242 | vcpu->fpu_active = 0; |
6243 | kvm_x86_ops->fpu_deactivate(vcpu); | |
6244 | } | |
af585b92 GN |
6245 | if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) { |
6246 | /* Page is swapped out. Do synthetic halt */ | |
6247 | vcpu->arch.apf.halted = true; | |
6248 | r = 1; | |
6249 | goto out; | |
6250 | } | |
c9aaa895 GC |
6251 | if (kvm_check_request(KVM_REQ_STEAL_UPDATE, vcpu)) |
6252 | record_steal_time(vcpu); | |
64d60670 PB |
6253 | if (kvm_check_request(KVM_REQ_SMI, vcpu)) |
6254 | process_smi(vcpu); | |
7460fb4a AK |
6255 | if (kvm_check_request(KVM_REQ_NMI, vcpu)) |
6256 | process_nmi(vcpu); | |
f5132b01 | 6257 | if (kvm_check_request(KVM_REQ_PMU, vcpu)) |
c6702c9d | 6258 | kvm_pmu_handle_event(vcpu); |
f5132b01 | 6259 | if (kvm_check_request(KVM_REQ_PMI, vcpu)) |
c6702c9d | 6260 | kvm_pmu_deliver_pmi(vcpu); |
3d81bc7e YZ |
6261 | if (kvm_check_request(KVM_REQ_SCAN_IOAPIC, vcpu)) |
6262 | vcpu_scan_ioapic(vcpu); | |
4256f43f TC |
6263 | if (kvm_check_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu)) |
6264 | kvm_vcpu_reload_apic_access_page(vcpu); | |
2ce79189 AS |
6265 | if (kvm_check_request(KVM_REQ_HV_CRASH, vcpu)) { |
6266 | vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; | |
6267 | vcpu->run->system_event.type = KVM_SYSTEM_EVENT_CRASH; | |
6268 | r = 0; | |
6269 | goto out; | |
6270 | } | |
2f52d58c | 6271 | } |
b93463aa | 6272 | |
b463a6f7 | 6273 | if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { |
66450a21 JK |
6274 | kvm_apic_accept_events(vcpu); |
6275 | if (vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { | |
6276 | r = 1; | |
6277 | goto out; | |
6278 | } | |
6279 | ||
b6b8a145 JK |
6280 | if (inject_pending_event(vcpu, req_int_win) != 0) |
6281 | req_immediate_exit = true; | |
b463a6f7 | 6282 | /* enable NMI/IRQ window open exits if needed */ |
b6b8a145 | 6283 | else if (vcpu->arch.nmi_pending) |
c9a7953f | 6284 | kvm_x86_ops->enable_nmi_window(vcpu); |
c7c9c56c | 6285 | else if (kvm_cpu_has_injectable_intr(vcpu) || req_int_win) |
c9a7953f | 6286 | kvm_x86_ops->enable_irq_window(vcpu); |
b463a6f7 AK |
6287 | |
6288 | if (kvm_lapic_enabled(vcpu)) { | |
c7c9c56c YZ |
6289 | /* |
6290 | * Update architecture specific hints for APIC | |
6291 | * virtual interrupt delivery. | |
6292 | */ | |
6293 | if (kvm_x86_ops->hwapic_irr_update) | |
6294 | kvm_x86_ops->hwapic_irr_update(vcpu, | |
6295 | kvm_lapic_find_highest_irr(vcpu)); | |
b463a6f7 AK |
6296 | update_cr8_intercept(vcpu); |
6297 | kvm_lapic_sync_to_vapic(vcpu); | |
6298 | } | |
6299 | } | |
6300 | ||
d8368af8 AK |
6301 | r = kvm_mmu_reload(vcpu); |
6302 | if (unlikely(r)) { | |
d905c069 | 6303 | goto cancel_injection; |
d8368af8 AK |
6304 | } |
6305 | ||
b6c7a5dc HB |
6306 | preempt_disable(); |
6307 | ||
6308 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2608d7a1 AK |
6309 | if (vcpu->fpu_active) |
6310 | kvm_load_guest_fpu(vcpu); | |
2acf923e | 6311 | kvm_load_guest_xcr0(vcpu); |
b6c7a5dc | 6312 | |
6b7e2d09 XG |
6313 | vcpu->mode = IN_GUEST_MODE; |
6314 | ||
01b71917 MT |
6315 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
6316 | ||
6b7e2d09 XG |
6317 | /* We should set ->mode before check ->requests, |
6318 | * see the comment in make_all_cpus_request. | |
6319 | */ | |
01b71917 | 6320 | smp_mb__after_srcu_read_unlock(); |
b6c7a5dc | 6321 | |
d94e1dc9 | 6322 | local_irq_disable(); |
32f88400 | 6323 | |
6b7e2d09 | 6324 | if (vcpu->mode == EXITING_GUEST_MODE || vcpu->requests |
d94e1dc9 | 6325 | || need_resched() || signal_pending(current)) { |
6b7e2d09 | 6326 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 6327 | smp_wmb(); |
6c142801 AK |
6328 | local_irq_enable(); |
6329 | preempt_enable(); | |
01b71917 | 6330 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
6c142801 | 6331 | r = 1; |
d905c069 | 6332 | goto cancel_injection; |
6c142801 AK |
6333 | } |
6334 | ||
d6185f20 NHE |
6335 | if (req_immediate_exit) |
6336 | smp_send_reschedule(vcpu->cpu); | |
6337 | ||
ccf73aaf | 6338 | __kvm_guest_enter(); |
b6c7a5dc | 6339 | |
42dbaa5a | 6340 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
6341 | set_debugreg(0, 7); |
6342 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
6343 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
6344 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
6345 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
c77fb5fe | 6346 | set_debugreg(vcpu->arch.dr6, 6); |
ae561ede | 6347 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD; |
42dbaa5a | 6348 | } |
b6c7a5dc | 6349 | |
229456fc | 6350 | trace_kvm_entry(vcpu->vcpu_id); |
d0659d94 | 6351 | wait_lapic_expire(vcpu); |
851ba692 | 6352 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 6353 | |
c77fb5fe PB |
6354 | /* |
6355 | * Do this here before restoring debug registers on the host. And | |
6356 | * since we do this before handling the vmexit, a DR access vmexit | |
6357 | * can (a) read the correct value of the debug registers, (b) set | |
6358 | * KVM_DEBUGREG_WONT_EXIT again. | |
6359 | */ | |
6360 | if (unlikely(vcpu->arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT)) { | |
6361 | int i; | |
6362 | ||
6363 | WARN_ON(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP); | |
6364 | kvm_x86_ops->sync_dirty_debug_regs(vcpu); | |
6365 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
6366 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
6367 | } | |
6368 | ||
24f1e32c FW |
6369 | /* |
6370 | * If the guest has used debug registers, at least dr7 | |
6371 | * will be disabled while returning to the host. | |
6372 | * If we don't have active breakpoints in the host, we don't | |
6373 | * care about the messed up debug address registers. But if | |
6374 | * we have some of them active, restore the old state. | |
6375 | */ | |
59d8eb53 | 6376 | if (hw_breakpoint_active()) |
24f1e32c | 6377 | hw_breakpoint_restore(); |
42dbaa5a | 6378 | |
886b470c | 6379 | vcpu->arch.last_guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu, |
4ea1636b | 6380 | rdtsc()); |
1d5f066e | 6381 | |
6b7e2d09 | 6382 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 6383 | smp_wmb(); |
a547c6db YZ |
6384 | |
6385 | /* Interrupt is enabled by handle_external_intr() */ | |
6386 | kvm_x86_ops->handle_external_intr(vcpu); | |
b6c7a5dc HB |
6387 | |
6388 | ++vcpu->stat.exits; | |
6389 | ||
6390 | /* | |
6391 | * We must have an instruction between local_irq_enable() and | |
6392 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
6393 | * the interrupt shadow. The stat.exits increment will do nicely. | |
6394 | * But we need to prevent reordering, hence this barrier(): | |
6395 | */ | |
6396 | barrier(); | |
6397 | ||
6398 | kvm_guest_exit(); | |
6399 | ||
6400 | preempt_enable(); | |
6401 | ||
f656ce01 | 6402 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 6403 | |
b6c7a5dc HB |
6404 | /* |
6405 | * Profile KVM exit RIPs: | |
6406 | */ | |
6407 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
6408 | unsigned long rip = kvm_rip_read(vcpu); |
6409 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
6410 | } |
6411 | ||
cc578287 ZA |
6412 | if (unlikely(vcpu->arch.tsc_always_catchup)) |
6413 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); | |
298101da | 6414 | |
5cfb1d5a MT |
6415 | if (vcpu->arch.apic_attention) |
6416 | kvm_lapic_sync_from_vapic(vcpu); | |
b93463aa | 6417 | |
851ba692 | 6418 | r = kvm_x86_ops->handle_exit(vcpu); |
d905c069 MT |
6419 | return r; |
6420 | ||
6421 | cancel_injection: | |
6422 | kvm_x86_ops->cancel_injection(vcpu); | |
ae7a2a3f MT |
6423 | if (unlikely(vcpu->arch.apic_attention)) |
6424 | kvm_lapic_sync_from_vapic(vcpu); | |
d7690175 MT |
6425 | out: |
6426 | return r; | |
6427 | } | |
b6c7a5dc | 6428 | |
362c698f PB |
6429 | static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu) |
6430 | { | |
9c8fd1ba PB |
6431 | if (!kvm_arch_vcpu_runnable(vcpu)) { |
6432 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); | |
6433 | kvm_vcpu_block(vcpu); | |
6434 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); | |
6435 | if (!kvm_check_request(KVM_REQ_UNHALT, vcpu)) | |
6436 | return 1; | |
6437 | } | |
362c698f PB |
6438 | |
6439 | kvm_apic_accept_events(vcpu); | |
6440 | switch(vcpu->arch.mp_state) { | |
6441 | case KVM_MP_STATE_HALTED: | |
6442 | vcpu->arch.pv.pv_unhalted = false; | |
6443 | vcpu->arch.mp_state = | |
6444 | KVM_MP_STATE_RUNNABLE; | |
6445 | case KVM_MP_STATE_RUNNABLE: | |
6446 | vcpu->arch.apf.halted = false; | |
6447 | break; | |
6448 | case KVM_MP_STATE_INIT_RECEIVED: | |
6449 | break; | |
6450 | default: | |
6451 | return -EINTR; | |
6452 | break; | |
6453 | } | |
6454 | return 1; | |
6455 | } | |
09cec754 | 6456 | |
362c698f | 6457 | static int vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
6458 | { |
6459 | int r; | |
f656ce01 | 6460 | struct kvm *kvm = vcpu->kvm; |
d7690175 | 6461 | |
f656ce01 | 6462 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 6463 | |
362c698f | 6464 | for (;;) { |
af585b92 GN |
6465 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
6466 | !vcpu->arch.apf.halted) | |
851ba692 | 6467 | r = vcpu_enter_guest(vcpu); |
362c698f PB |
6468 | else |
6469 | r = vcpu_block(kvm, vcpu); | |
09cec754 GN |
6470 | if (r <= 0) |
6471 | break; | |
6472 | ||
6473 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
6474 | if (kvm_cpu_has_pending_timer(vcpu)) | |
6475 | kvm_inject_pending_timer_irqs(vcpu); | |
6476 | ||
851ba692 | 6477 | if (dm_request_for_irq_injection(vcpu)) { |
09cec754 | 6478 | r = -EINTR; |
851ba692 | 6479 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 | 6480 | ++vcpu->stat.request_irq_exits; |
362c698f | 6481 | break; |
09cec754 | 6482 | } |
af585b92 GN |
6483 | |
6484 | kvm_check_async_pf_completion(vcpu); | |
6485 | ||
09cec754 GN |
6486 | if (signal_pending(current)) { |
6487 | r = -EINTR; | |
851ba692 | 6488 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 | 6489 | ++vcpu->stat.signal_exits; |
362c698f | 6490 | break; |
09cec754 GN |
6491 | } |
6492 | if (need_resched()) { | |
f656ce01 | 6493 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
c08ac06a | 6494 | cond_resched(); |
f656ce01 | 6495 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 6496 | } |
b6c7a5dc HB |
6497 | } |
6498 | ||
f656ce01 | 6499 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc HB |
6500 | |
6501 | return r; | |
6502 | } | |
6503 | ||
716d51ab GN |
6504 | static inline int complete_emulated_io(struct kvm_vcpu *vcpu) |
6505 | { | |
6506 | int r; | |
6507 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
6508 | r = emulate_instruction(vcpu, EMULTYPE_NO_DECODE); | |
6509 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); | |
6510 | if (r != EMULATE_DONE) | |
6511 | return 0; | |
6512 | return 1; | |
6513 | } | |
6514 | ||
6515 | static int complete_emulated_pio(struct kvm_vcpu *vcpu) | |
6516 | { | |
6517 | BUG_ON(!vcpu->arch.pio.count); | |
6518 | ||
6519 | return complete_emulated_io(vcpu); | |
6520 | } | |
6521 | ||
f78146b0 AK |
6522 | /* |
6523 | * Implements the following, as a state machine: | |
6524 | * | |
6525 | * read: | |
6526 | * for each fragment | |
87da7e66 XG |
6527 | * for each mmio piece in the fragment |
6528 | * write gpa, len | |
6529 | * exit | |
6530 | * copy data | |
f78146b0 AK |
6531 | * execute insn |
6532 | * | |
6533 | * write: | |
6534 | * for each fragment | |
87da7e66 XG |
6535 | * for each mmio piece in the fragment |
6536 | * write gpa, len | |
6537 | * copy data | |
6538 | * exit | |
f78146b0 | 6539 | */ |
716d51ab | 6540 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu) |
5287f194 AK |
6541 | { |
6542 | struct kvm_run *run = vcpu->run; | |
f78146b0 | 6543 | struct kvm_mmio_fragment *frag; |
87da7e66 | 6544 | unsigned len; |
5287f194 | 6545 | |
716d51ab | 6546 | BUG_ON(!vcpu->mmio_needed); |
5287f194 | 6547 | |
716d51ab | 6548 | /* Complete previous fragment */ |
87da7e66 XG |
6549 | frag = &vcpu->mmio_fragments[vcpu->mmio_cur_fragment]; |
6550 | len = min(8u, frag->len); | |
716d51ab | 6551 | if (!vcpu->mmio_is_write) |
87da7e66 XG |
6552 | memcpy(frag->data, run->mmio.data, len); |
6553 | ||
6554 | if (frag->len <= 8) { | |
6555 | /* Switch to the next fragment. */ | |
6556 | frag++; | |
6557 | vcpu->mmio_cur_fragment++; | |
6558 | } else { | |
6559 | /* Go forward to the next mmio piece. */ | |
6560 | frag->data += len; | |
6561 | frag->gpa += len; | |
6562 | frag->len -= len; | |
6563 | } | |
6564 | ||
a08d3b3b | 6565 | if (vcpu->mmio_cur_fragment >= vcpu->mmio_nr_fragments) { |
716d51ab | 6566 | vcpu->mmio_needed = 0; |
0912c977 PB |
6567 | |
6568 | /* FIXME: return into emulator if single-stepping. */ | |
cef4dea0 | 6569 | if (vcpu->mmio_is_write) |
716d51ab GN |
6570 | return 1; |
6571 | vcpu->mmio_read_completed = 1; | |
6572 | return complete_emulated_io(vcpu); | |
6573 | } | |
87da7e66 | 6574 | |
716d51ab GN |
6575 | run->exit_reason = KVM_EXIT_MMIO; |
6576 | run->mmio.phys_addr = frag->gpa; | |
6577 | if (vcpu->mmio_is_write) | |
87da7e66 XG |
6578 | memcpy(run->mmio.data, frag->data, min(8u, frag->len)); |
6579 | run->mmio.len = min(8u, frag->len); | |
716d51ab GN |
6580 | run->mmio.is_write = vcpu->mmio_is_write; |
6581 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; | |
6582 | return 0; | |
5287f194 AK |
6583 | } |
6584 | ||
716d51ab | 6585 | |
b6c7a5dc HB |
6586 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
6587 | { | |
c5bedc68 | 6588 | struct fpu *fpu = ¤t->thread.fpu; |
b6c7a5dc HB |
6589 | int r; |
6590 | sigset_t sigsaved; | |
6591 | ||
c4d72e2d | 6592 | fpu__activate_curr(fpu); |
e5c30142 | 6593 | |
ac9f6dc0 AK |
6594 | if (vcpu->sigset_active) |
6595 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
6596 | ||
a4535290 | 6597 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 6598 | kvm_vcpu_block(vcpu); |
66450a21 | 6599 | kvm_apic_accept_events(vcpu); |
d7690175 | 6600 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
6601 | r = -EAGAIN; |
6602 | goto out; | |
b6c7a5dc HB |
6603 | } |
6604 | ||
b6c7a5dc | 6605 | /* re-sync apic's tpr */ |
eea1cff9 AP |
6606 | if (!irqchip_in_kernel(vcpu->kvm)) { |
6607 | if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) { | |
6608 | r = -EINVAL; | |
6609 | goto out; | |
6610 | } | |
6611 | } | |
b6c7a5dc | 6612 | |
716d51ab GN |
6613 | if (unlikely(vcpu->arch.complete_userspace_io)) { |
6614 | int (*cui)(struct kvm_vcpu *) = vcpu->arch.complete_userspace_io; | |
6615 | vcpu->arch.complete_userspace_io = NULL; | |
6616 | r = cui(vcpu); | |
6617 | if (r <= 0) | |
6618 | goto out; | |
6619 | } else | |
6620 | WARN_ON(vcpu->arch.pio.count || vcpu->mmio_needed); | |
5287f194 | 6621 | |
362c698f | 6622 | r = vcpu_run(vcpu); |
b6c7a5dc HB |
6623 | |
6624 | out: | |
f1d86e46 | 6625 | post_kvm_run_save(vcpu); |
b6c7a5dc HB |
6626 | if (vcpu->sigset_active) |
6627 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
6628 | ||
b6c7a5dc HB |
6629 | return r; |
6630 | } | |
6631 | ||
6632 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
6633 | { | |
7ae441ea GN |
6634 | if (vcpu->arch.emulate_regs_need_sync_to_vcpu) { |
6635 | /* | |
6636 | * We are here if userspace calls get_regs() in the middle of | |
6637 | * instruction emulation. Registers state needs to be copied | |
4a969980 | 6638 | * back from emulation context to vcpu. Userspace shouldn't do |
7ae441ea GN |
6639 | * that usually, but some bad designed PV devices (vmware |
6640 | * backdoor interface) need this to work | |
6641 | */ | |
dd856efa | 6642 | emulator_writeback_register_cache(&vcpu->arch.emulate_ctxt); |
7ae441ea GN |
6643 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
6644 | } | |
5fdbf976 MT |
6645 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
6646 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
6647 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
6648 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
6649 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
6650 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
6651 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
6652 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 6653 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
6654 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
6655 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
6656 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
6657 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
6658 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
6659 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
6660 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
6661 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
6662 | #endif |
6663 | ||
5fdbf976 | 6664 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 6665 | regs->rflags = kvm_get_rflags(vcpu); |
b6c7a5dc | 6666 | |
b6c7a5dc HB |
6667 | return 0; |
6668 | } | |
6669 | ||
6670 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
6671 | { | |
7ae441ea GN |
6672 | vcpu->arch.emulate_regs_need_sync_from_vcpu = true; |
6673 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; | |
6674 | ||
5fdbf976 MT |
6675 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
6676 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
6677 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
6678 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
6679 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
6680 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
6681 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
6682 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 6683 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
6684 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
6685 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
6686 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
6687 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
6688 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
6689 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
6690 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
6691 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
6692 | #endif |
6693 | ||
5fdbf976 | 6694 | kvm_rip_write(vcpu, regs->rip); |
91586a3b | 6695 | kvm_set_rflags(vcpu, regs->rflags); |
b6c7a5dc | 6696 | |
b4f14abd JK |
6697 | vcpu->arch.exception.pending = false; |
6698 | ||
3842d135 AK |
6699 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
6700 | ||
b6c7a5dc HB |
6701 | return 0; |
6702 | } | |
6703 | ||
b6c7a5dc HB |
6704 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
6705 | { | |
6706 | struct kvm_segment cs; | |
6707 | ||
3e6e0aab | 6708 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
6709 | *db = cs.db; |
6710 | *l = cs.l; | |
6711 | } | |
6712 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
6713 | ||
6714 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
6715 | struct kvm_sregs *sregs) | |
6716 | { | |
89a27f4d | 6717 | struct desc_ptr dt; |
b6c7a5dc | 6718 | |
3e6e0aab GT |
6719 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
6720 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
6721 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
6722 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
6723 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
6724 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 6725 | |
3e6e0aab GT |
6726 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
6727 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
6728 | |
6729 | kvm_x86_ops->get_idt(vcpu, &dt); | |
89a27f4d GN |
6730 | sregs->idt.limit = dt.size; |
6731 | sregs->idt.base = dt.address; | |
b6c7a5dc | 6732 | kvm_x86_ops->get_gdt(vcpu, &dt); |
89a27f4d GN |
6733 | sregs->gdt.limit = dt.size; |
6734 | sregs->gdt.base = dt.address; | |
b6c7a5dc | 6735 | |
4d4ec087 | 6736 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c | 6737 | sregs->cr2 = vcpu->arch.cr2; |
9f8fe504 | 6738 | sregs->cr3 = kvm_read_cr3(vcpu); |
fc78f519 | 6739 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 6740 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 6741 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
6742 | sregs->apic_base = kvm_get_apic_base(vcpu); |
6743 | ||
923c61bb | 6744 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 6745 | |
36752c9b | 6746 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
6747 | set_bit(vcpu->arch.interrupt.nr, |
6748 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 6749 | |
b6c7a5dc HB |
6750 | return 0; |
6751 | } | |
6752 | ||
62d9f0db MT |
6753 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
6754 | struct kvm_mp_state *mp_state) | |
6755 | { | |
66450a21 | 6756 | kvm_apic_accept_events(vcpu); |
6aef266c SV |
6757 | if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED && |
6758 | vcpu->arch.pv.pv_unhalted) | |
6759 | mp_state->mp_state = KVM_MP_STATE_RUNNABLE; | |
6760 | else | |
6761 | mp_state->mp_state = vcpu->arch.mp_state; | |
6762 | ||
62d9f0db MT |
6763 | return 0; |
6764 | } | |
6765 | ||
6766 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
6767 | struct kvm_mp_state *mp_state) | |
6768 | { | |
66450a21 JK |
6769 | if (!kvm_vcpu_has_lapic(vcpu) && |
6770 | mp_state->mp_state != KVM_MP_STATE_RUNNABLE) | |
6771 | return -EINVAL; | |
6772 | ||
6773 | if (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED) { | |
6774 | vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; | |
6775 | set_bit(KVM_APIC_SIPI, &vcpu->arch.apic->pending_events); | |
6776 | } else | |
6777 | vcpu->arch.mp_state = mp_state->mp_state; | |
3842d135 | 6778 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
62d9f0db MT |
6779 | return 0; |
6780 | } | |
6781 | ||
7f3d35fd KW |
6782 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, |
6783 | int reason, bool has_error_code, u32 error_code) | |
b6c7a5dc | 6784 | { |
9d74191a | 6785 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d | 6786 | int ret; |
e01c2426 | 6787 | |
8ec4722d | 6788 | init_emulate_ctxt(vcpu); |
c697518a | 6789 | |
7f3d35fd | 6790 | ret = emulator_task_switch(ctxt, tss_selector, idt_index, reason, |
9d74191a | 6791 | has_error_code, error_code); |
c697518a | 6792 | |
c697518a | 6793 | if (ret) |
19d04437 | 6794 | return EMULATE_FAIL; |
37817f29 | 6795 | |
9d74191a TY |
6796 | kvm_rip_write(vcpu, ctxt->eip); |
6797 | kvm_set_rflags(vcpu, ctxt->eflags); | |
3842d135 | 6798 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
19d04437 | 6799 | return EMULATE_DONE; |
37817f29 IE |
6800 | } |
6801 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
6802 | ||
b6c7a5dc HB |
6803 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
6804 | struct kvm_sregs *sregs) | |
6805 | { | |
58cb628d | 6806 | struct msr_data apic_base_msr; |
b6c7a5dc | 6807 | int mmu_reset_needed = 0; |
63f42e02 | 6808 | int pending_vec, max_bits, idx; |
89a27f4d | 6809 | struct desc_ptr dt; |
b6c7a5dc | 6810 | |
6d1068b3 PM |
6811 | if (!guest_cpuid_has_xsave(vcpu) && (sregs->cr4 & X86_CR4_OSXSAVE)) |
6812 | return -EINVAL; | |
6813 | ||
89a27f4d GN |
6814 | dt.size = sregs->idt.limit; |
6815 | dt.address = sregs->idt.base; | |
b6c7a5dc | 6816 | kvm_x86_ops->set_idt(vcpu, &dt); |
89a27f4d GN |
6817 | dt.size = sregs->gdt.limit; |
6818 | dt.address = sregs->gdt.base; | |
b6c7a5dc HB |
6819 | kvm_x86_ops->set_gdt(vcpu, &dt); |
6820 | ||
ad312c7c | 6821 | vcpu->arch.cr2 = sregs->cr2; |
9f8fe504 | 6822 | mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3; |
dc7e795e | 6823 | vcpu->arch.cr3 = sregs->cr3; |
aff48baa | 6824 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
b6c7a5dc | 6825 | |
2d3ad1f4 | 6826 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 6827 | |
f6801dff | 6828 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 6829 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
58cb628d JK |
6830 | apic_base_msr.data = sregs->apic_base; |
6831 | apic_base_msr.host_initiated = true; | |
6832 | kvm_set_apic_base(vcpu, &apic_base_msr); | |
b6c7a5dc | 6833 | |
4d4ec087 | 6834 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 6835 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 6836 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 6837 | |
fc78f519 | 6838 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 6839 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
3ea3aa8c | 6840 | if (sregs->cr4 & X86_CR4_OSXSAVE) |
00b27a3e | 6841 | kvm_update_cpuid(vcpu); |
63f42e02 XG |
6842 | |
6843 | idx = srcu_read_lock(&vcpu->kvm->srcu); | |
7c93be44 | 6844 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
9f8fe504 | 6845 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); |
7c93be44 MT |
6846 | mmu_reset_needed = 1; |
6847 | } | |
63f42e02 | 6848 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b6c7a5dc HB |
6849 | |
6850 | if (mmu_reset_needed) | |
6851 | kvm_mmu_reset_context(vcpu); | |
6852 | ||
a50abc3b | 6853 | max_bits = KVM_NR_INTERRUPTS; |
923c61bb GN |
6854 | pending_vec = find_first_bit( |
6855 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
6856 | if (pending_vec < max_bits) { | |
66fd3f7f | 6857 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb | 6858 | pr_debug("Set back pending irq %d\n", pending_vec); |
b6c7a5dc HB |
6859 | } |
6860 | ||
3e6e0aab GT |
6861 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
6862 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
6863 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
6864 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
6865 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
6866 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 6867 | |
3e6e0aab GT |
6868 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
6869 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 6870 | |
5f0269f5 ME |
6871 | update_cr8_intercept(vcpu); |
6872 | ||
9c3e4aab | 6873 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 6874 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 6875 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 6876 | !is_protmode(vcpu)) |
9c3e4aab MT |
6877 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
6878 | ||
3842d135 AK |
6879 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
6880 | ||
b6c7a5dc HB |
6881 | return 0; |
6882 | } | |
6883 | ||
d0bfb940 JK |
6884 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
6885 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 6886 | { |
355be0b9 | 6887 | unsigned long rflags; |
ae675ef0 | 6888 | int i, r; |
b6c7a5dc | 6889 | |
4f926bf2 JK |
6890 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
6891 | r = -EBUSY; | |
6892 | if (vcpu->arch.exception.pending) | |
2122ff5e | 6893 | goto out; |
4f926bf2 JK |
6894 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
6895 | kvm_queue_exception(vcpu, DB_VECTOR); | |
6896 | else | |
6897 | kvm_queue_exception(vcpu, BP_VECTOR); | |
6898 | } | |
6899 | ||
91586a3b JK |
6900 | /* |
6901 | * Read rflags as long as potentially injected trace flags are still | |
6902 | * filtered out. | |
6903 | */ | |
6904 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
6905 | |
6906 | vcpu->guest_debug = dbg->control; | |
6907 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
6908 | vcpu->guest_debug = 0; | |
6909 | ||
6910 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
6911 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
6912 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
c8639010 | 6913 | vcpu->arch.guest_debug_dr7 = dbg->arch.debugreg[7]; |
ae675ef0 JK |
6914 | } else { |
6915 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
6916 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
ae675ef0 | 6917 | } |
c8639010 | 6918 | kvm_update_dr7(vcpu); |
ae675ef0 | 6919 | |
f92653ee JK |
6920 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
6921 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + | |
6922 | get_segment_base(vcpu, VCPU_SREG_CS); | |
94fe45da | 6923 | |
91586a3b JK |
6924 | /* |
6925 | * Trigger an rflags update that will inject or remove the trace | |
6926 | * flags. | |
6927 | */ | |
6928 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 6929 | |
c8639010 | 6930 | kvm_x86_ops->update_db_bp_intercept(vcpu); |
b6c7a5dc | 6931 | |
4f926bf2 | 6932 | r = 0; |
d0bfb940 | 6933 | |
2122ff5e | 6934 | out: |
b6c7a5dc HB |
6935 | |
6936 | return r; | |
6937 | } | |
6938 | ||
8b006791 ZX |
6939 | /* |
6940 | * Translate a guest virtual address to a guest physical address. | |
6941 | */ | |
6942 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
6943 | struct kvm_translation *tr) | |
6944 | { | |
6945 | unsigned long vaddr = tr->linear_address; | |
6946 | gpa_t gpa; | |
f656ce01 | 6947 | int idx; |
8b006791 | 6948 | |
f656ce01 | 6949 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 6950 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 6951 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
6952 | tr->physical_address = gpa; |
6953 | tr->valid = gpa != UNMAPPED_GVA; | |
6954 | tr->writeable = 1; | |
6955 | tr->usermode = 0; | |
8b006791 ZX |
6956 | |
6957 | return 0; | |
6958 | } | |
6959 | ||
d0752060 HB |
6960 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
6961 | { | |
c47ada30 | 6962 | struct fxregs_state *fxsave = |
7366ed77 | 6963 | &vcpu->arch.guest_fpu.state.fxsave; |
d0752060 | 6964 | |
d0752060 HB |
6965 | memcpy(fpu->fpr, fxsave->st_space, 128); |
6966 | fpu->fcw = fxsave->cwd; | |
6967 | fpu->fsw = fxsave->swd; | |
6968 | fpu->ftwx = fxsave->twd; | |
6969 | fpu->last_opcode = fxsave->fop; | |
6970 | fpu->last_ip = fxsave->rip; | |
6971 | fpu->last_dp = fxsave->rdp; | |
6972 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
6973 | ||
d0752060 HB |
6974 | return 0; |
6975 | } | |
6976 | ||
6977 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
6978 | { | |
c47ada30 | 6979 | struct fxregs_state *fxsave = |
7366ed77 | 6980 | &vcpu->arch.guest_fpu.state.fxsave; |
d0752060 | 6981 | |
d0752060 HB |
6982 | memcpy(fxsave->st_space, fpu->fpr, 128); |
6983 | fxsave->cwd = fpu->fcw; | |
6984 | fxsave->swd = fpu->fsw; | |
6985 | fxsave->twd = fpu->ftwx; | |
6986 | fxsave->fop = fpu->last_opcode; | |
6987 | fxsave->rip = fpu->last_ip; | |
6988 | fxsave->rdp = fpu->last_dp; | |
6989 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
6990 | ||
d0752060 HB |
6991 | return 0; |
6992 | } | |
6993 | ||
0ee6a517 | 6994 | static void fx_init(struct kvm_vcpu *vcpu) |
d0752060 | 6995 | { |
bf935b0b | 6996 | fpstate_init(&vcpu->arch.guest_fpu.state); |
df1daba7 | 6997 | if (cpu_has_xsaves) |
7366ed77 | 6998 | vcpu->arch.guest_fpu.state.xsave.header.xcomp_bv = |
df1daba7 | 6999 | host_xcr0 | XSTATE_COMPACTION_ENABLED; |
d0752060 | 7000 | |
2acf923e DC |
7001 | /* |
7002 | * Ensure guest xcr0 is valid for loading | |
7003 | */ | |
7004 | vcpu->arch.xcr0 = XSTATE_FP; | |
7005 | ||
ad312c7c | 7006 | vcpu->arch.cr0 |= X86_CR0_ET; |
d0752060 | 7007 | } |
d0752060 HB |
7008 | |
7009 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) | |
7010 | { | |
2608d7a1 | 7011 | if (vcpu->guest_fpu_loaded) |
d0752060 HB |
7012 | return; |
7013 | ||
2acf923e DC |
7014 | /* |
7015 | * Restore all possible states in the guest, | |
7016 | * and assume host would use all available bits. | |
7017 | * Guest xcr0 would be loaded later. | |
7018 | */ | |
7019 | kvm_put_guest_xcr0(vcpu); | |
d0752060 | 7020 | vcpu->guest_fpu_loaded = 1; |
b1a74bf8 | 7021 | __kernel_fpu_begin(); |
003e2e8b | 7022 | __copy_kernel_to_fpregs(&vcpu->arch.guest_fpu.state); |
0c04851c | 7023 | trace_kvm_fpu(1); |
d0752060 | 7024 | } |
d0752060 HB |
7025 | |
7026 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
7027 | { | |
2acf923e DC |
7028 | kvm_put_guest_xcr0(vcpu); |
7029 | ||
653f52c3 RR |
7030 | if (!vcpu->guest_fpu_loaded) { |
7031 | vcpu->fpu_counter = 0; | |
d0752060 | 7032 | return; |
653f52c3 | 7033 | } |
d0752060 HB |
7034 | |
7035 | vcpu->guest_fpu_loaded = 0; | |
4f836347 | 7036 | copy_fpregs_to_fpstate(&vcpu->arch.guest_fpu); |
b1a74bf8 | 7037 | __kernel_fpu_end(); |
f096ed85 | 7038 | ++vcpu->stat.fpu_reload; |
653f52c3 RR |
7039 | /* |
7040 | * If using eager FPU mode, or if the guest is a frequent user | |
7041 | * of the FPU, just leave the FPU active for next time. | |
7042 | * Every 255 times fpu_counter rolls over to 0; a guest that uses | |
7043 | * the FPU in bursts will revert to loading it on demand. | |
7044 | */ | |
a9b4fb7e | 7045 | if (!vcpu->arch.eager_fpu) { |
653f52c3 RR |
7046 | if (++vcpu->fpu_counter < 5) |
7047 | kvm_make_request(KVM_REQ_DEACTIVATE_FPU, vcpu); | |
7048 | } | |
0c04851c | 7049 | trace_kvm_fpu(0); |
d0752060 | 7050 | } |
e9b11c17 ZX |
7051 | |
7052 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
7053 | { | |
12f9a48f | 7054 | kvmclock_reset(vcpu); |
7f1ea208 | 7055 | |
f5f48ee1 | 7056 | free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); |
e9b11c17 ZX |
7057 | kvm_x86_ops->vcpu_free(vcpu); |
7058 | } | |
7059 | ||
7060 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
7061 | unsigned int id) | |
7062 | { | |
c447e76b LL |
7063 | struct kvm_vcpu *vcpu; |
7064 | ||
6755bae8 ZA |
7065 | if (check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0) |
7066 | printk_once(KERN_WARNING | |
7067 | "kvm: SMP vm created on host with unstable TSC; " | |
7068 | "guest TSC will not be reliable\n"); | |
c447e76b LL |
7069 | |
7070 | vcpu = kvm_x86_ops->vcpu_create(kvm, id); | |
7071 | ||
c447e76b | 7072 | return vcpu; |
26e5215f | 7073 | } |
e9b11c17 | 7074 | |
26e5215f AK |
7075 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
7076 | { | |
7077 | int r; | |
e9b11c17 | 7078 | |
19efffa2 | 7079 | kvm_vcpu_mtrr_init(vcpu); |
9fc77441 MT |
7080 | r = vcpu_load(vcpu); |
7081 | if (r) | |
7082 | return r; | |
d28bc9dd | 7083 | kvm_vcpu_reset(vcpu, false); |
8a3c1a33 | 7084 | kvm_mmu_setup(vcpu); |
e9b11c17 | 7085 | vcpu_put(vcpu); |
26e5215f | 7086 | return r; |
e9b11c17 ZX |
7087 | } |
7088 | ||
31928aa5 | 7089 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 7090 | { |
8fe8ab46 | 7091 | struct msr_data msr; |
332967a3 | 7092 | struct kvm *kvm = vcpu->kvm; |
42897d86 | 7093 | |
31928aa5 DD |
7094 | if (vcpu_load(vcpu)) |
7095 | return; | |
8fe8ab46 WA |
7096 | msr.data = 0x0; |
7097 | msr.index = MSR_IA32_TSC; | |
7098 | msr.host_initiated = true; | |
7099 | kvm_write_tsc(vcpu, &msr); | |
42897d86 MT |
7100 | vcpu_put(vcpu); |
7101 | ||
630994b3 MT |
7102 | if (!kvmclock_periodic_sync) |
7103 | return; | |
7104 | ||
332967a3 AJ |
7105 | schedule_delayed_work(&kvm->arch.kvmclock_sync_work, |
7106 | KVMCLOCK_SYNC_PERIOD); | |
42897d86 MT |
7107 | } |
7108 | ||
d40ccc62 | 7109 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 | 7110 | { |
9fc77441 | 7111 | int r; |
344d9588 GN |
7112 | vcpu->arch.apf.msr_val = 0; |
7113 | ||
9fc77441 MT |
7114 | r = vcpu_load(vcpu); |
7115 | BUG_ON(r); | |
e9b11c17 ZX |
7116 | kvm_mmu_unload(vcpu); |
7117 | vcpu_put(vcpu); | |
7118 | ||
7119 | kvm_x86_ops->vcpu_free(vcpu); | |
7120 | } | |
7121 | ||
d28bc9dd | 7122 | void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) |
e9b11c17 | 7123 | { |
e69fab5d PB |
7124 | vcpu->arch.hflags = 0; |
7125 | ||
7460fb4a AK |
7126 | atomic_set(&vcpu->arch.nmi_queued, 0); |
7127 | vcpu->arch.nmi_pending = 0; | |
448fa4a9 | 7128 | vcpu->arch.nmi_injected = false; |
5f7552d4 NA |
7129 | kvm_clear_interrupt_queue(vcpu); |
7130 | kvm_clear_exception_queue(vcpu); | |
448fa4a9 | 7131 | |
42dbaa5a | 7132 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); |
ae561ede | 7133 | kvm_update_dr0123(vcpu); |
6f43ed01 | 7134 | vcpu->arch.dr6 = DR6_INIT; |
73aaf249 | 7135 | kvm_update_dr6(vcpu); |
42dbaa5a | 7136 | vcpu->arch.dr7 = DR7_FIXED_1; |
c8639010 | 7137 | kvm_update_dr7(vcpu); |
42dbaa5a | 7138 | |
1119022c NA |
7139 | vcpu->arch.cr2 = 0; |
7140 | ||
3842d135 | 7141 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
344d9588 | 7142 | vcpu->arch.apf.msr_val = 0; |
c9aaa895 | 7143 | vcpu->arch.st.msr_val = 0; |
3842d135 | 7144 | |
12f9a48f GC |
7145 | kvmclock_reset(vcpu); |
7146 | ||
af585b92 GN |
7147 | kvm_clear_async_pf_completion_queue(vcpu); |
7148 | kvm_async_pf_hash_reset(vcpu); | |
7149 | vcpu->arch.apf.halted = false; | |
3842d135 | 7150 | |
64d60670 | 7151 | if (!init_event) { |
d28bc9dd | 7152 | kvm_pmu_reset(vcpu); |
64d60670 PB |
7153 | vcpu->arch.smbase = 0x30000; |
7154 | } | |
f5132b01 | 7155 | |
66f7b72e JS |
7156 | memset(vcpu->arch.regs, 0, sizeof(vcpu->arch.regs)); |
7157 | vcpu->arch.regs_avail = ~0; | |
7158 | vcpu->arch.regs_dirty = ~0; | |
7159 | ||
d28bc9dd | 7160 | kvm_x86_ops->vcpu_reset(vcpu, init_event); |
e9b11c17 ZX |
7161 | } |
7162 | ||
2b4a273b | 7163 | void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector) |
66450a21 JK |
7164 | { |
7165 | struct kvm_segment cs; | |
7166 | ||
7167 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
7168 | cs.selector = vector << 8; | |
7169 | cs.base = vector << 12; | |
7170 | kvm_set_segment(vcpu, &cs, VCPU_SREG_CS); | |
7171 | kvm_rip_write(vcpu, 0); | |
e9b11c17 ZX |
7172 | } |
7173 | ||
13a34e06 | 7174 | int kvm_arch_hardware_enable(void) |
e9b11c17 | 7175 | { |
ca84d1a2 ZA |
7176 | struct kvm *kvm; |
7177 | struct kvm_vcpu *vcpu; | |
7178 | int i; | |
0dd6a6ed ZA |
7179 | int ret; |
7180 | u64 local_tsc; | |
7181 | u64 max_tsc = 0; | |
7182 | bool stable, backwards_tsc = false; | |
18863bdd AK |
7183 | |
7184 | kvm_shared_msr_cpu_online(); | |
13a34e06 | 7185 | ret = kvm_x86_ops->hardware_enable(); |
0dd6a6ed ZA |
7186 | if (ret != 0) |
7187 | return ret; | |
7188 | ||
4ea1636b | 7189 | local_tsc = rdtsc(); |
0dd6a6ed ZA |
7190 | stable = !check_tsc_unstable(); |
7191 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
7192 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
7193 | if (!stable && vcpu->cpu == smp_processor_id()) | |
105b21bb | 7194 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0dd6a6ed ZA |
7195 | if (stable && vcpu->arch.last_host_tsc > local_tsc) { |
7196 | backwards_tsc = true; | |
7197 | if (vcpu->arch.last_host_tsc > max_tsc) | |
7198 | max_tsc = vcpu->arch.last_host_tsc; | |
7199 | } | |
7200 | } | |
7201 | } | |
7202 | ||
7203 | /* | |
7204 | * Sometimes, even reliable TSCs go backwards. This happens on | |
7205 | * platforms that reset TSC during suspend or hibernate actions, but | |
7206 | * maintain synchronization. We must compensate. Fortunately, we can | |
7207 | * detect that condition here, which happens early in CPU bringup, | |
7208 | * before any KVM threads can be running. Unfortunately, we can't | |
7209 | * bring the TSCs fully up to date with real time, as we aren't yet far | |
7210 | * enough into CPU bringup that we know how much real time has actually | |
7211 | * elapsed; our helper function, get_kernel_ns() will be using boot | |
7212 | * variables that haven't been updated yet. | |
7213 | * | |
7214 | * So we simply find the maximum observed TSC above, then record the | |
7215 | * adjustment to TSC in each VCPU. When the VCPU later gets loaded, | |
7216 | * the adjustment will be applied. Note that we accumulate | |
7217 | * adjustments, in case multiple suspend cycles happen before some VCPU | |
7218 | * gets a chance to run again. In the event that no KVM threads get a | |
7219 | * chance to run, we will miss the entire elapsed period, as we'll have | |
7220 | * reset last_host_tsc, so VCPUs will not have the TSC adjusted and may | |
7221 | * loose cycle time. This isn't too big a deal, since the loss will be | |
7222 | * uniform across all VCPUs (not to mention the scenario is extremely | |
7223 | * unlikely). It is possible that a second hibernate recovery happens | |
7224 | * much faster than a first, causing the observed TSC here to be | |
7225 | * smaller; this would require additional padding adjustment, which is | |
7226 | * why we set last_host_tsc to the local tsc observed here. | |
7227 | * | |
7228 | * N.B. - this code below runs only on platforms with reliable TSC, | |
7229 | * as that is the only way backwards_tsc is set above. Also note | |
7230 | * that this runs for ALL vcpus, which is not a bug; all VCPUs should | |
7231 | * have the same delta_cyc adjustment applied if backwards_tsc | |
7232 | * is detected. Note further, this adjustment is only done once, | |
7233 | * as we reset last_host_tsc on all VCPUs to stop this from being | |
7234 | * called multiple times (one for each physical CPU bringup). | |
7235 | * | |
4a969980 | 7236 | * Platforms with unreliable TSCs don't have to deal with this, they |
0dd6a6ed ZA |
7237 | * will be compensated by the logic in vcpu_load, which sets the TSC to |
7238 | * catchup mode. This will catchup all VCPUs to real time, but cannot | |
7239 | * guarantee that they stay in perfect synchronization. | |
7240 | */ | |
7241 | if (backwards_tsc) { | |
7242 | u64 delta_cyc = max_tsc - local_tsc; | |
16a96021 | 7243 | backwards_tsc_observed = true; |
0dd6a6ed ZA |
7244 | list_for_each_entry(kvm, &vm_list, vm_list) { |
7245 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
7246 | vcpu->arch.tsc_offset_adjustment += delta_cyc; | |
7247 | vcpu->arch.last_host_tsc = local_tsc; | |
105b21bb | 7248 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
0dd6a6ed ZA |
7249 | } |
7250 | ||
7251 | /* | |
7252 | * We have to disable TSC offset matching.. if you were | |
7253 | * booting a VM while issuing an S4 host suspend.... | |
7254 | * you may have some problem. Solving this issue is | |
7255 | * left as an exercise to the reader. | |
7256 | */ | |
7257 | kvm->arch.last_tsc_nsec = 0; | |
7258 | kvm->arch.last_tsc_write = 0; | |
7259 | } | |
7260 | ||
7261 | } | |
7262 | return 0; | |
e9b11c17 ZX |
7263 | } |
7264 | ||
13a34e06 | 7265 | void kvm_arch_hardware_disable(void) |
e9b11c17 | 7266 | { |
13a34e06 RK |
7267 | kvm_x86_ops->hardware_disable(); |
7268 | drop_user_return_notifiers(); | |
e9b11c17 ZX |
7269 | } |
7270 | ||
7271 | int kvm_arch_hardware_setup(void) | |
7272 | { | |
9e9c3fe4 NA |
7273 | int r; |
7274 | ||
7275 | r = kvm_x86_ops->hardware_setup(); | |
7276 | if (r != 0) | |
7277 | return r; | |
7278 | ||
7279 | kvm_init_msr_list(); | |
7280 | return 0; | |
e9b11c17 ZX |
7281 | } |
7282 | ||
7283 | void kvm_arch_hardware_unsetup(void) | |
7284 | { | |
7285 | kvm_x86_ops->hardware_unsetup(); | |
7286 | } | |
7287 | ||
7288 | void kvm_arch_check_processor_compat(void *rtn) | |
7289 | { | |
7290 | kvm_x86_ops->check_processor_compatibility(rtn); | |
d71ba788 PB |
7291 | } |
7292 | ||
7293 | bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu) | |
7294 | { | |
7295 | return vcpu->kvm->arch.bsp_vcpu_id == vcpu->vcpu_id; | |
7296 | } | |
7297 | EXPORT_SYMBOL_GPL(kvm_vcpu_is_reset_bsp); | |
7298 | ||
7299 | bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) | |
7300 | { | |
7301 | return (vcpu->arch.apic_base & MSR_IA32_APICBASE_BSP) != 0; | |
e9b11c17 ZX |
7302 | } |
7303 | ||
3e515705 AK |
7304 | bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) |
7305 | { | |
7306 | return irqchip_in_kernel(vcpu->kvm) == (vcpu->arch.apic != NULL); | |
7307 | } | |
7308 | ||
54e9818f GN |
7309 | struct static_key kvm_no_apic_vcpu __read_mostly; |
7310 | ||
e9b11c17 ZX |
7311 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
7312 | { | |
7313 | struct page *page; | |
7314 | struct kvm *kvm; | |
7315 | int r; | |
7316 | ||
7317 | BUG_ON(vcpu->kvm == NULL); | |
7318 | kvm = vcpu->kvm; | |
7319 | ||
6aef266c | 7320 | vcpu->arch.pv.pv_unhalted = false; |
9aabc88f | 7321 | vcpu->arch.emulate_ctxt.ops = &emulate_ops; |
58d269d8 | 7322 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_reset_bsp(vcpu)) |
a4535290 | 7323 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 7324 | else |
a4535290 | 7325 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
7326 | |
7327 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
7328 | if (!page) { | |
7329 | r = -ENOMEM; | |
7330 | goto fail; | |
7331 | } | |
ad312c7c | 7332 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 | 7333 | |
cc578287 | 7334 | kvm_set_tsc_khz(vcpu, max_tsc_khz); |
c285545f | 7335 | |
e9b11c17 ZX |
7336 | r = kvm_mmu_create(vcpu); |
7337 | if (r < 0) | |
7338 | goto fail_free_pio_data; | |
7339 | ||
7340 | if (irqchip_in_kernel(kvm)) { | |
7341 | r = kvm_create_lapic(vcpu); | |
7342 | if (r < 0) | |
7343 | goto fail_mmu_destroy; | |
54e9818f GN |
7344 | } else |
7345 | static_key_slow_inc(&kvm_no_apic_vcpu); | |
e9b11c17 | 7346 | |
890ca9ae HY |
7347 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
7348 | GFP_KERNEL); | |
7349 | if (!vcpu->arch.mce_banks) { | |
7350 | r = -ENOMEM; | |
443c39bc | 7351 | goto fail_free_lapic; |
890ca9ae HY |
7352 | } |
7353 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
7354 | ||
f1797359 WY |
7355 | if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL)) { |
7356 | r = -ENOMEM; | |
f5f48ee1 | 7357 | goto fail_free_mce_banks; |
f1797359 | 7358 | } |
f5f48ee1 | 7359 | |
0ee6a517 | 7360 | fx_init(vcpu); |
66f7b72e | 7361 | |
ba904635 | 7362 | vcpu->arch.ia32_tsc_adjust_msr = 0x0; |
0b79459b | 7363 | vcpu->arch.pv_time_enabled = false; |
d7876f1b PB |
7364 | |
7365 | vcpu->arch.guest_supported_xcr0 = 0; | |
4344ee98 | 7366 | vcpu->arch.guest_xstate_size = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET; |
d7876f1b | 7367 | |
5a4f55cd EK |
7368 | vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu); |
7369 | ||
74545705 RK |
7370 | vcpu->arch.pat = MSR_IA32_CR_PAT_DEFAULT; |
7371 | ||
af585b92 | 7372 | kvm_async_pf_hash_reset(vcpu); |
f5132b01 | 7373 | kvm_pmu_init(vcpu); |
af585b92 | 7374 | |
e9b11c17 | 7375 | return 0; |
0ee6a517 | 7376 | |
f5f48ee1 SY |
7377 | fail_free_mce_banks: |
7378 | kfree(vcpu->arch.mce_banks); | |
443c39bc WY |
7379 | fail_free_lapic: |
7380 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
7381 | fail_mmu_destroy: |
7382 | kvm_mmu_destroy(vcpu); | |
7383 | fail_free_pio_data: | |
ad312c7c | 7384 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
7385 | fail: |
7386 | return r; | |
7387 | } | |
7388 | ||
7389 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
7390 | { | |
f656ce01 MT |
7391 | int idx; |
7392 | ||
f5132b01 | 7393 | kvm_pmu_destroy(vcpu); |
36cb93fd | 7394 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 7395 | kvm_free_lapic(vcpu); |
f656ce01 | 7396 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 7397 | kvm_mmu_destroy(vcpu); |
f656ce01 | 7398 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 7399 | free_page((unsigned long)vcpu->arch.pio_data); |
54e9818f GN |
7400 | if (!irqchip_in_kernel(vcpu->kvm)) |
7401 | static_key_slow_dec(&kvm_no_apic_vcpu); | |
e9b11c17 | 7402 | } |
d19a9cd2 | 7403 | |
e790d9ef RK |
7404 | void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) |
7405 | { | |
ae97a3b8 | 7406 | kvm_x86_ops->sched_in(vcpu, cpu); |
e790d9ef RK |
7407 | } |
7408 | ||
e08b9637 | 7409 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
d19a9cd2 | 7410 | { |
e08b9637 CO |
7411 | if (type) |
7412 | return -EINVAL; | |
7413 | ||
6ef768fa | 7414 | INIT_HLIST_HEAD(&kvm->arch.mask_notifier_list); |
f05e70ac | 7415 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
365c8868 | 7416 | INIT_LIST_HEAD(&kvm->arch.zapped_obsolete_pages); |
4d5c5d0f | 7417 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
e0f0bbc5 | 7418 | atomic_set(&kvm->arch.noncoherent_dma_count, 0); |
d19a9cd2 | 7419 | |
5550af4d SY |
7420 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
7421 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
7a84428a AW |
7422 | /* Reserve bit 1 of irq_sources_bitmap for irqfd-resampler */ |
7423 | set_bit(KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID, | |
7424 | &kvm->arch.irq_sources_bitmap); | |
5550af4d | 7425 | |
038f8c11 | 7426 | raw_spin_lock_init(&kvm->arch.tsc_write_lock); |
1e08ec4a | 7427 | mutex_init(&kvm->arch.apic_map_lock); |
d828199e MT |
7428 | spin_lock_init(&kvm->arch.pvclock_gtod_sync_lock); |
7429 | ||
7430 | pvclock_update_vm_gtod_copy(kvm); | |
53f658b3 | 7431 | |
7e44e449 | 7432 | INIT_DELAYED_WORK(&kvm->arch.kvmclock_update_work, kvmclock_update_fn); |
332967a3 | 7433 | INIT_DELAYED_WORK(&kvm->arch.kvmclock_sync_work, kvmclock_sync_fn); |
7e44e449 | 7434 | |
d89f5eff | 7435 | return 0; |
d19a9cd2 ZX |
7436 | } |
7437 | ||
7438 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
7439 | { | |
9fc77441 MT |
7440 | int r; |
7441 | r = vcpu_load(vcpu); | |
7442 | BUG_ON(r); | |
d19a9cd2 ZX |
7443 | kvm_mmu_unload(vcpu); |
7444 | vcpu_put(vcpu); | |
7445 | } | |
7446 | ||
7447 | static void kvm_free_vcpus(struct kvm *kvm) | |
7448 | { | |
7449 | unsigned int i; | |
988a2cae | 7450 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
7451 | |
7452 | /* | |
7453 | * Unpin any mmu pages first. | |
7454 | */ | |
af585b92 GN |
7455 | kvm_for_each_vcpu(i, vcpu, kvm) { |
7456 | kvm_clear_async_pf_completion_queue(vcpu); | |
988a2cae | 7457 | kvm_unload_vcpu_mmu(vcpu); |
af585b92 | 7458 | } |
988a2cae GN |
7459 | kvm_for_each_vcpu(i, vcpu, kvm) |
7460 | kvm_arch_vcpu_free(vcpu); | |
7461 | ||
7462 | mutex_lock(&kvm->lock); | |
7463 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
7464 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 7465 | |
988a2cae GN |
7466 | atomic_set(&kvm->online_vcpus, 0); |
7467 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
7468 | } |
7469 | ||
ad8ba2cd SY |
7470 | void kvm_arch_sync_events(struct kvm *kvm) |
7471 | { | |
332967a3 | 7472 | cancel_delayed_work_sync(&kvm->arch.kvmclock_sync_work); |
7e44e449 | 7473 | cancel_delayed_work_sync(&kvm->arch.kvmclock_update_work); |
ba4cef31 | 7474 | kvm_free_all_assigned_devices(kvm); |
aea924f6 | 7475 | kvm_free_pit(kvm); |
ad8ba2cd SY |
7476 | } |
7477 | ||
9da0e4d5 PB |
7478 | int __x86_set_memory_region(struct kvm *kvm, |
7479 | const struct kvm_userspace_memory_region *mem) | |
7480 | { | |
7481 | int i, r; | |
7482 | ||
7483 | /* Called with kvm->slots_lock held. */ | |
7484 | BUG_ON(mem->slot >= KVM_MEM_SLOTS_NUM); | |
7485 | ||
7486 | for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) { | |
7487 | struct kvm_userspace_memory_region m = *mem; | |
7488 | ||
7489 | m.slot |= i << 16; | |
7490 | r = __kvm_set_memory_region(kvm, &m); | |
7491 | if (r < 0) | |
7492 | return r; | |
7493 | } | |
7494 | ||
7495 | return 0; | |
7496 | } | |
7497 | EXPORT_SYMBOL_GPL(__x86_set_memory_region); | |
7498 | ||
7499 | int x86_set_memory_region(struct kvm *kvm, | |
7500 | const struct kvm_userspace_memory_region *mem) | |
7501 | { | |
7502 | int r; | |
7503 | ||
7504 | mutex_lock(&kvm->slots_lock); | |
7505 | r = __x86_set_memory_region(kvm, mem); | |
7506 | mutex_unlock(&kvm->slots_lock); | |
7507 | ||
7508 | return r; | |
7509 | } | |
7510 | EXPORT_SYMBOL_GPL(x86_set_memory_region); | |
7511 | ||
d19a9cd2 ZX |
7512 | void kvm_arch_destroy_vm(struct kvm *kvm) |
7513 | { | |
27469d29 AH |
7514 | if (current->mm == kvm->mm) { |
7515 | /* | |
7516 | * Free memory regions allocated on behalf of userspace, | |
7517 | * unless the the memory map has changed due to process exit | |
7518 | * or fd copying. | |
7519 | */ | |
7520 | struct kvm_userspace_memory_region mem; | |
7521 | memset(&mem, 0, sizeof(mem)); | |
7522 | mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT; | |
9da0e4d5 | 7523 | x86_set_memory_region(kvm, &mem); |
27469d29 AH |
7524 | |
7525 | mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT; | |
9da0e4d5 | 7526 | x86_set_memory_region(kvm, &mem); |
27469d29 AH |
7527 | |
7528 | mem.slot = TSS_PRIVATE_MEMSLOT; | |
9da0e4d5 | 7529 | x86_set_memory_region(kvm, &mem); |
27469d29 | 7530 | } |
6eb55818 | 7531 | kvm_iommu_unmap_guest(kvm); |
d7deeeb0 ZX |
7532 | kfree(kvm->arch.vpic); |
7533 | kfree(kvm->arch.vioapic); | |
d19a9cd2 | 7534 | kvm_free_vcpus(kvm); |
1e08ec4a | 7535 | kfree(rcu_dereference_check(kvm->arch.apic_map, 1)); |
d19a9cd2 | 7536 | } |
0de10343 | 7537 | |
5587027c | 7538 | void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, |
db3fe4eb TY |
7539 | struct kvm_memory_slot *dont) |
7540 | { | |
7541 | int i; | |
7542 | ||
d89cc617 TY |
7543 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
7544 | if (!dont || free->arch.rmap[i] != dont->arch.rmap[i]) { | |
548ef284 | 7545 | kvfree(free->arch.rmap[i]); |
d89cc617 | 7546 | free->arch.rmap[i] = NULL; |
77d11309 | 7547 | } |
d89cc617 TY |
7548 | if (i == 0) |
7549 | continue; | |
7550 | ||
7551 | if (!dont || free->arch.lpage_info[i - 1] != | |
7552 | dont->arch.lpage_info[i - 1]) { | |
548ef284 | 7553 | kvfree(free->arch.lpage_info[i - 1]); |
d89cc617 | 7554 | free->arch.lpage_info[i - 1] = NULL; |
db3fe4eb TY |
7555 | } |
7556 | } | |
7557 | } | |
7558 | ||
5587027c AK |
7559 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
7560 | unsigned long npages) | |
db3fe4eb TY |
7561 | { |
7562 | int i; | |
7563 | ||
d89cc617 | 7564 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
db3fe4eb TY |
7565 | unsigned long ugfn; |
7566 | int lpages; | |
d89cc617 | 7567 | int level = i + 1; |
db3fe4eb TY |
7568 | |
7569 | lpages = gfn_to_index(slot->base_gfn + npages - 1, | |
7570 | slot->base_gfn, level) + 1; | |
7571 | ||
d89cc617 TY |
7572 | slot->arch.rmap[i] = |
7573 | kvm_kvzalloc(lpages * sizeof(*slot->arch.rmap[i])); | |
7574 | if (!slot->arch.rmap[i]) | |
77d11309 | 7575 | goto out_free; |
d89cc617 TY |
7576 | if (i == 0) |
7577 | continue; | |
77d11309 | 7578 | |
d89cc617 TY |
7579 | slot->arch.lpage_info[i - 1] = kvm_kvzalloc(lpages * |
7580 | sizeof(*slot->arch.lpage_info[i - 1])); | |
7581 | if (!slot->arch.lpage_info[i - 1]) | |
db3fe4eb TY |
7582 | goto out_free; |
7583 | ||
7584 | if (slot->base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1)) | |
d89cc617 | 7585 | slot->arch.lpage_info[i - 1][0].write_count = 1; |
db3fe4eb | 7586 | if ((slot->base_gfn + npages) & (KVM_PAGES_PER_HPAGE(level) - 1)) |
d89cc617 | 7587 | slot->arch.lpage_info[i - 1][lpages - 1].write_count = 1; |
db3fe4eb TY |
7588 | ugfn = slot->userspace_addr >> PAGE_SHIFT; |
7589 | /* | |
7590 | * If the gfn and userspace address are not aligned wrt each | |
7591 | * other, or if explicitly asked to, disable large page | |
7592 | * support for this slot | |
7593 | */ | |
7594 | if ((slot->base_gfn ^ ugfn) & (KVM_PAGES_PER_HPAGE(level) - 1) || | |
7595 | !kvm_largepages_enabled()) { | |
7596 | unsigned long j; | |
7597 | ||
7598 | for (j = 0; j < lpages; ++j) | |
d89cc617 | 7599 | slot->arch.lpage_info[i - 1][j].write_count = 1; |
db3fe4eb TY |
7600 | } |
7601 | } | |
7602 | ||
7603 | return 0; | |
7604 | ||
7605 | out_free: | |
d89cc617 | 7606 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
548ef284 | 7607 | kvfree(slot->arch.rmap[i]); |
d89cc617 TY |
7608 | slot->arch.rmap[i] = NULL; |
7609 | if (i == 0) | |
7610 | continue; | |
7611 | ||
548ef284 | 7612 | kvfree(slot->arch.lpage_info[i - 1]); |
d89cc617 | 7613 | slot->arch.lpage_info[i - 1] = NULL; |
db3fe4eb TY |
7614 | } |
7615 | return -ENOMEM; | |
7616 | } | |
7617 | ||
15f46015 | 7618 | void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) |
e59dbe09 | 7619 | { |
e6dff7d1 TY |
7620 | /* |
7621 | * memslots->generation has been incremented. | |
7622 | * mmio generation may have reached its maximum value. | |
7623 | */ | |
54bf36aa | 7624 | kvm_mmu_invalidate_mmio_sptes(kvm, slots); |
e59dbe09 TY |
7625 | } |
7626 | ||
f7784b8e MT |
7627 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
7628 | struct kvm_memory_slot *memslot, | |
09170a49 | 7629 | const struct kvm_userspace_memory_region *mem, |
7b6195a9 | 7630 | enum kvm_mr_change change) |
0de10343 | 7631 | { |
7a905b14 TY |
7632 | /* |
7633 | * Only private memory slots need to be mapped here since | |
7634 | * KVM_SET_MEMORY_REGION ioctl is no longer supported. | |
0de10343 | 7635 | */ |
7b6195a9 | 7636 | if ((memslot->id >= KVM_USER_MEM_SLOTS) && (change == KVM_MR_CREATE)) { |
7a905b14 | 7637 | unsigned long userspace_addr; |
604b38ac | 7638 | |
7a905b14 TY |
7639 | /* |
7640 | * MAP_SHARED to prevent internal slot pages from being moved | |
7641 | * by fork()/COW. | |
7642 | */ | |
7b6195a9 | 7643 | userspace_addr = vm_mmap(NULL, 0, memslot->npages * PAGE_SIZE, |
7a905b14 TY |
7644 | PROT_READ | PROT_WRITE, |
7645 | MAP_SHARED | MAP_ANONYMOUS, 0); | |
0de10343 | 7646 | |
7a905b14 TY |
7647 | if (IS_ERR((void *)userspace_addr)) |
7648 | return PTR_ERR((void *)userspace_addr); | |
604b38ac | 7649 | |
7a905b14 | 7650 | memslot->userspace_addr = userspace_addr; |
0de10343 ZX |
7651 | } |
7652 | ||
f7784b8e MT |
7653 | return 0; |
7654 | } | |
7655 | ||
88178fd4 KH |
7656 | static void kvm_mmu_slot_apply_flags(struct kvm *kvm, |
7657 | struct kvm_memory_slot *new) | |
7658 | { | |
7659 | /* Still write protect RO slot */ | |
7660 | if (new->flags & KVM_MEM_READONLY) { | |
7661 | kvm_mmu_slot_remove_write_access(kvm, new); | |
7662 | return; | |
7663 | } | |
7664 | ||
7665 | /* | |
7666 | * Call kvm_x86_ops dirty logging hooks when they are valid. | |
7667 | * | |
7668 | * kvm_x86_ops->slot_disable_log_dirty is called when: | |
7669 | * | |
7670 | * - KVM_MR_CREATE with dirty logging is disabled | |
7671 | * - KVM_MR_FLAGS_ONLY with dirty logging is disabled in new flag | |
7672 | * | |
7673 | * The reason is, in case of PML, we need to set D-bit for any slots | |
7674 | * with dirty logging disabled in order to eliminate unnecessary GPA | |
7675 | * logging in PML buffer (and potential PML buffer full VMEXT). This | |
7676 | * guarantees leaving PML enabled during guest's lifetime won't have | |
7677 | * any additonal overhead from PML when guest is running with dirty | |
7678 | * logging disabled for memory slots. | |
7679 | * | |
7680 | * kvm_x86_ops->slot_enable_log_dirty is called when switching new slot | |
7681 | * to dirty logging mode. | |
7682 | * | |
7683 | * If kvm_x86_ops dirty logging hooks are invalid, use write protect. | |
7684 | * | |
7685 | * In case of write protect: | |
7686 | * | |
7687 | * Write protect all pages for dirty logging. | |
7688 | * | |
7689 | * All the sptes including the large sptes which point to this | |
7690 | * slot are set to readonly. We can not create any new large | |
7691 | * spte on this slot until the end of the logging. | |
7692 | * | |
7693 | * See the comments in fast_page_fault(). | |
7694 | */ | |
7695 | if (new->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
7696 | if (kvm_x86_ops->slot_enable_log_dirty) | |
7697 | kvm_x86_ops->slot_enable_log_dirty(kvm, new); | |
7698 | else | |
7699 | kvm_mmu_slot_remove_write_access(kvm, new); | |
7700 | } else { | |
7701 | if (kvm_x86_ops->slot_disable_log_dirty) | |
7702 | kvm_x86_ops->slot_disable_log_dirty(kvm, new); | |
7703 | } | |
7704 | } | |
7705 | ||
f7784b8e | 7706 | void kvm_arch_commit_memory_region(struct kvm *kvm, |
09170a49 | 7707 | const struct kvm_userspace_memory_region *mem, |
8482644a | 7708 | const struct kvm_memory_slot *old, |
f36f3f28 | 7709 | const struct kvm_memory_slot *new, |
8482644a | 7710 | enum kvm_mr_change change) |
f7784b8e | 7711 | { |
8482644a | 7712 | int nr_mmu_pages = 0; |
f7784b8e | 7713 | |
f36f3f28 | 7714 | if (change == KVM_MR_DELETE && old->id >= KVM_USER_MEM_SLOTS) { |
f7784b8e MT |
7715 | int ret; |
7716 | ||
8482644a TY |
7717 | ret = vm_munmap(old->userspace_addr, |
7718 | old->npages * PAGE_SIZE); | |
f7784b8e MT |
7719 | if (ret < 0) |
7720 | printk(KERN_WARNING | |
7721 | "kvm_vm_ioctl_set_memory_region: " | |
7722 | "failed to munmap memory\n"); | |
7723 | } | |
7724 | ||
48c0e4e9 XG |
7725 | if (!kvm->arch.n_requested_mmu_pages) |
7726 | nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); | |
7727 | ||
48c0e4e9 | 7728 | if (nr_mmu_pages) |
0de10343 | 7729 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); |
1c91cad4 | 7730 | |
3ea3b7fa WL |
7731 | /* |
7732 | * Dirty logging tracks sptes in 4k granularity, meaning that large | |
7733 | * sptes have to be split. If live migration is successful, the guest | |
7734 | * in the source machine will be destroyed and large sptes will be | |
7735 | * created in the destination. However, if the guest continues to run | |
7736 | * in the source machine (for example if live migration fails), small | |
7737 | * sptes will remain around and cause bad performance. | |
7738 | * | |
7739 | * Scan sptes if dirty logging has been stopped, dropping those | |
7740 | * which can be collapsed into a single large-page spte. Later | |
7741 | * page faults will create the large-page sptes. | |
7742 | */ | |
7743 | if ((change != KVM_MR_DELETE) && | |
7744 | (old->flags & KVM_MEM_LOG_DIRTY_PAGES) && | |
7745 | !(new->flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
7746 | kvm_mmu_zap_collapsible_sptes(kvm, new); | |
7747 | ||
c972f3b1 | 7748 | /* |
88178fd4 | 7749 | * Set up write protection and/or dirty logging for the new slot. |
c126d94f | 7750 | * |
88178fd4 KH |
7751 | * For KVM_MR_DELETE and KVM_MR_MOVE, the shadow pages of old slot have |
7752 | * been zapped so no dirty logging staff is needed for old slot. For | |
7753 | * KVM_MR_FLAGS_ONLY, the old slot is essentially the same one as the | |
7754 | * new and it's also covered when dealing with the new slot. | |
f36f3f28 PB |
7755 | * |
7756 | * FIXME: const-ify all uses of struct kvm_memory_slot. | |
c972f3b1 | 7757 | */ |
88178fd4 | 7758 | if (change != KVM_MR_DELETE) |
f36f3f28 | 7759 | kvm_mmu_slot_apply_flags(kvm, (struct kvm_memory_slot *) new); |
0de10343 | 7760 | } |
1d737c8a | 7761 | |
2df72e9b | 7762 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
34d4cb8f | 7763 | { |
6ca18b69 | 7764 | kvm_mmu_invalidate_zap_all_pages(kvm); |
34d4cb8f MT |
7765 | } |
7766 | ||
2df72e9b MT |
7767 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
7768 | struct kvm_memory_slot *slot) | |
7769 | { | |
6ca18b69 | 7770 | kvm_mmu_invalidate_zap_all_pages(kvm); |
2df72e9b MT |
7771 | } |
7772 | ||
1d737c8a ZX |
7773 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
7774 | { | |
b6b8a145 JK |
7775 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) |
7776 | kvm_x86_ops->check_nested_events(vcpu, false); | |
7777 | ||
af585b92 GN |
7778 | return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
7779 | !vcpu->arch.apf.halted) | |
7780 | || !list_empty_careful(&vcpu->async_pf.done) | |
66450a21 | 7781 | || kvm_apic_has_events(vcpu) |
6aef266c | 7782 | || vcpu->arch.pv.pv_unhalted |
7460fb4a | 7783 | || atomic_read(&vcpu->arch.nmi_queued) || |
a1b37100 GN |
7784 | (kvm_arch_interrupt_allowed(vcpu) && |
7785 | kvm_cpu_has_interrupt(vcpu)); | |
1d737c8a | 7786 | } |
5736199a | 7787 | |
b6d33834 | 7788 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
5736199a | 7789 | { |
b6d33834 | 7790 | return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; |
5736199a | 7791 | } |
78646121 GN |
7792 | |
7793 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
7794 | { | |
7795 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
7796 | } | |
229456fc | 7797 | |
82b32774 | 7798 | unsigned long kvm_get_linear_rip(struct kvm_vcpu *vcpu) |
f92653ee | 7799 | { |
82b32774 NA |
7800 | if (is_64_bit_mode(vcpu)) |
7801 | return kvm_rip_read(vcpu); | |
7802 | return (u32)(get_segment_base(vcpu, VCPU_SREG_CS) + | |
7803 | kvm_rip_read(vcpu)); | |
7804 | } | |
7805 | EXPORT_SYMBOL_GPL(kvm_get_linear_rip); | |
f92653ee | 7806 | |
82b32774 NA |
7807 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
7808 | { | |
7809 | return kvm_get_linear_rip(vcpu) == linear_rip; | |
f92653ee JK |
7810 | } |
7811 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); | |
7812 | ||
94fe45da JK |
7813 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
7814 | { | |
7815 | unsigned long rflags; | |
7816 | ||
7817 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
7818 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
c310bac5 | 7819 | rflags &= ~X86_EFLAGS_TF; |
94fe45da JK |
7820 | return rflags; |
7821 | } | |
7822 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
7823 | ||
6addfc42 | 7824 | static void __kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) |
94fe45da JK |
7825 | { |
7826 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
f92653ee | 7827 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
c310bac5 | 7828 | rflags |= X86_EFLAGS_TF; |
94fe45da | 7829 | kvm_x86_ops->set_rflags(vcpu, rflags); |
6addfc42 PB |
7830 | } |
7831 | ||
7832 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
7833 | { | |
7834 | __kvm_set_rflags(vcpu, rflags); | |
3842d135 | 7835 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
94fe45da JK |
7836 | } |
7837 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
7838 | ||
56028d08 GN |
7839 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work) |
7840 | { | |
7841 | int r; | |
7842 | ||
fb67e14f | 7843 | if ((vcpu->arch.mmu.direct_map != work->arch.direct_map) || |
f2e10669 | 7844 | work->wakeup_all) |
56028d08 GN |
7845 | return; |
7846 | ||
7847 | r = kvm_mmu_reload(vcpu); | |
7848 | if (unlikely(r)) | |
7849 | return; | |
7850 | ||
fb67e14f XG |
7851 | if (!vcpu->arch.mmu.direct_map && |
7852 | work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu)) | |
7853 | return; | |
7854 | ||
56028d08 GN |
7855 | vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true); |
7856 | } | |
7857 | ||
af585b92 GN |
7858 | static inline u32 kvm_async_pf_hash_fn(gfn_t gfn) |
7859 | { | |
7860 | return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU)); | |
7861 | } | |
7862 | ||
7863 | static inline u32 kvm_async_pf_next_probe(u32 key) | |
7864 | { | |
7865 | return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1); | |
7866 | } | |
7867 | ||
7868 | static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
7869 | { | |
7870 | u32 key = kvm_async_pf_hash_fn(gfn); | |
7871 | ||
7872 | while (vcpu->arch.apf.gfns[key] != ~0) | |
7873 | key = kvm_async_pf_next_probe(key); | |
7874 | ||
7875 | vcpu->arch.apf.gfns[key] = gfn; | |
7876 | } | |
7877 | ||
7878 | static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn) | |
7879 | { | |
7880 | int i; | |
7881 | u32 key = kvm_async_pf_hash_fn(gfn); | |
7882 | ||
7883 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) && | |
c7d28c24 XG |
7884 | (vcpu->arch.apf.gfns[key] != gfn && |
7885 | vcpu->arch.apf.gfns[key] != ~0); i++) | |
af585b92 GN |
7886 | key = kvm_async_pf_next_probe(key); |
7887 | ||
7888 | return key; | |
7889 | } | |
7890 | ||
7891 | bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
7892 | { | |
7893 | return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn; | |
7894 | } | |
7895 | ||
7896 | static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
7897 | { | |
7898 | u32 i, j, k; | |
7899 | ||
7900 | i = j = kvm_async_pf_gfn_slot(vcpu, gfn); | |
7901 | while (true) { | |
7902 | vcpu->arch.apf.gfns[i] = ~0; | |
7903 | do { | |
7904 | j = kvm_async_pf_next_probe(j); | |
7905 | if (vcpu->arch.apf.gfns[j] == ~0) | |
7906 | return; | |
7907 | k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]); | |
7908 | /* | |
7909 | * k lies cyclically in ]i,j] | |
7910 | * | i.k.j | | |
7911 | * |....j i.k.| or |.k..j i...| | |
7912 | */ | |
7913 | } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j)); | |
7914 | vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j]; | |
7915 | i = j; | |
7916 | } | |
7917 | } | |
7918 | ||
7c90705b GN |
7919 | static int apf_put_user(struct kvm_vcpu *vcpu, u32 val) |
7920 | { | |
7921 | ||
7922 | return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val, | |
7923 | sizeof(val)); | |
7924 | } | |
7925 | ||
af585b92 GN |
7926 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
7927 | struct kvm_async_pf *work) | |
7928 | { | |
6389ee94 AK |
7929 | struct x86_exception fault; |
7930 | ||
7c90705b | 7931 | trace_kvm_async_pf_not_present(work->arch.token, work->gva); |
af585b92 | 7932 | kvm_add_async_pf_gfn(vcpu, work->arch.gfn); |
7c90705b GN |
7933 | |
7934 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) || | |
fc5f06fa GN |
7935 | (vcpu->arch.apf.send_user_only && |
7936 | kvm_x86_ops->get_cpl(vcpu) == 0)) | |
7c90705b GN |
7937 | kvm_make_request(KVM_REQ_APF_HALT, vcpu); |
7938 | else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) { | |
6389ee94 AK |
7939 | fault.vector = PF_VECTOR; |
7940 | fault.error_code_valid = true; | |
7941 | fault.error_code = 0; | |
7942 | fault.nested_page_fault = false; | |
7943 | fault.address = work->arch.token; | |
7944 | kvm_inject_page_fault(vcpu, &fault); | |
7c90705b | 7945 | } |
af585b92 GN |
7946 | } |
7947 | ||
7948 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
7949 | struct kvm_async_pf *work) | |
7950 | { | |
6389ee94 AK |
7951 | struct x86_exception fault; |
7952 | ||
7c90705b | 7953 | trace_kvm_async_pf_ready(work->arch.token, work->gva); |
f2e10669 | 7954 | if (work->wakeup_all) |
7c90705b GN |
7955 | work->arch.token = ~0; /* broadcast wakeup */ |
7956 | else | |
7957 | kvm_del_async_pf_gfn(vcpu, work->arch.gfn); | |
7958 | ||
7959 | if ((vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) && | |
7960 | !apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) { | |
6389ee94 AK |
7961 | fault.vector = PF_VECTOR; |
7962 | fault.error_code_valid = true; | |
7963 | fault.error_code = 0; | |
7964 | fault.nested_page_fault = false; | |
7965 | fault.address = work->arch.token; | |
7966 | kvm_inject_page_fault(vcpu, &fault); | |
7c90705b | 7967 | } |
e6d53e3b | 7968 | vcpu->arch.apf.halted = false; |
a4fa1635 | 7969 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
7c90705b GN |
7970 | } |
7971 | ||
7972 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
7973 | { | |
7974 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED)) | |
7975 | return true; | |
7976 | else | |
7977 | return !kvm_event_needs_reinjection(vcpu) && | |
7978 | kvm_x86_ops->interrupt_allowed(vcpu); | |
af585b92 GN |
7979 | } |
7980 | ||
5544eb9b PB |
7981 | void kvm_arch_start_assignment(struct kvm *kvm) |
7982 | { | |
7983 | atomic_inc(&kvm->arch.assigned_device_count); | |
7984 | } | |
7985 | EXPORT_SYMBOL_GPL(kvm_arch_start_assignment); | |
7986 | ||
7987 | void kvm_arch_end_assignment(struct kvm *kvm) | |
7988 | { | |
7989 | atomic_dec(&kvm->arch.assigned_device_count); | |
7990 | } | |
7991 | EXPORT_SYMBOL_GPL(kvm_arch_end_assignment); | |
7992 | ||
7993 | bool kvm_arch_has_assigned_device(struct kvm *kvm) | |
7994 | { | |
7995 | return atomic_read(&kvm->arch.assigned_device_count); | |
7996 | } | |
7997 | EXPORT_SYMBOL_GPL(kvm_arch_has_assigned_device); | |
7998 | ||
e0f0bbc5 AW |
7999 | void kvm_arch_register_noncoherent_dma(struct kvm *kvm) |
8000 | { | |
8001 | atomic_inc(&kvm->arch.noncoherent_dma_count); | |
8002 | } | |
8003 | EXPORT_SYMBOL_GPL(kvm_arch_register_noncoherent_dma); | |
8004 | ||
8005 | void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm) | |
8006 | { | |
8007 | atomic_dec(&kvm->arch.noncoherent_dma_count); | |
8008 | } | |
8009 | EXPORT_SYMBOL_GPL(kvm_arch_unregister_noncoherent_dma); | |
8010 | ||
8011 | bool kvm_arch_has_noncoherent_dma(struct kvm *kvm) | |
8012 | { | |
8013 | return atomic_read(&kvm->arch.noncoherent_dma_count); | |
8014 | } | |
8015 | EXPORT_SYMBOL_GPL(kvm_arch_has_noncoherent_dma); | |
8016 | ||
229456fc MT |
8017 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
8018 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); | |
8019 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
8020 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
8021 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 8022 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 8023 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 8024 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 8025 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 8026 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 8027 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
2e554e8d | 8028 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |
489223ed | 8029 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_write_tsc_offset); |
7b46268d | 8030 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ple_window); |
843e4330 | 8031 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pml_full); |