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Commit | Line | Data |
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043405e1 CO |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * derived from drivers/kvm/kvm_main.c | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
4d5c5d0f BAY |
7 | * Copyright (C) 2008 Qumranet, Inc. |
8 | * Copyright IBM Corporation, 2008 | |
9611c187 | 9 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
043405e1 CO |
10 | * |
11 | * Authors: | |
12 | * Avi Kivity <avi@qumranet.com> | |
13 | * Yaniv Kamay <yaniv@qumranet.com> | |
4d5c5d0f BAY |
14 | * Amit Shah <amit.shah@qumranet.com> |
15 | * Ben-Ami Yassour <benami@il.ibm.com> | |
043405e1 CO |
16 | * |
17 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
18 | * the COPYING file in the top-level directory. | |
19 | * | |
20 | */ | |
21 | ||
edf88417 | 22 | #include <linux/kvm_host.h> |
313a3dc7 | 23 | #include "irq.h" |
1d737c8a | 24 | #include "mmu.h" |
7837699f | 25 | #include "i8254.h" |
37817f29 | 26 | #include "tss.h" |
5fdbf976 | 27 | #include "kvm_cache_regs.h" |
26eef70c | 28 | #include "x86.h" |
00b27a3e | 29 | #include "cpuid.h" |
c9eab58f | 30 | #include "assigned-dev.h" |
474a5bb9 | 31 | #include "pmu.h" |
e83d5887 | 32 | #include "hyperv.h" |
313a3dc7 | 33 | |
18068523 | 34 | #include <linux/clocksource.h> |
4d5c5d0f | 35 | #include <linux/interrupt.h> |
313a3dc7 CO |
36 | #include <linux/kvm.h> |
37 | #include <linux/fs.h> | |
38 | #include <linux/vmalloc.h> | |
5fb76f9b | 39 | #include <linux/module.h> |
0de10343 | 40 | #include <linux/mman.h> |
2bacc55c | 41 | #include <linux/highmem.h> |
19de40a8 | 42 | #include <linux/iommu.h> |
62c476c7 | 43 | #include <linux/intel-iommu.h> |
c8076604 | 44 | #include <linux/cpufreq.h> |
18863bdd | 45 | #include <linux/user-return-notifier.h> |
a983fb23 | 46 | #include <linux/srcu.h> |
5a0e3ad6 | 47 | #include <linux/slab.h> |
ff9d07a0 | 48 | #include <linux/perf_event.h> |
7bee342a | 49 | #include <linux/uaccess.h> |
af585b92 | 50 | #include <linux/hash.h> |
a1b60c1c | 51 | #include <linux/pci.h> |
16e8d74d MT |
52 | #include <linux/timekeeper_internal.h> |
53 | #include <linux/pvclock_gtod.h> | |
87276880 FW |
54 | #include <linux/kvm_irqfd.h> |
55 | #include <linux/irqbypass.h> | |
aec51dc4 | 56 | #include <trace/events/kvm.h> |
2ed152af | 57 | |
229456fc MT |
58 | #define CREATE_TRACE_POINTS |
59 | #include "trace.h" | |
043405e1 | 60 | |
24f1e32c | 61 | #include <asm/debugreg.h> |
d825ed0a | 62 | #include <asm/msr.h> |
a5f61300 | 63 | #include <asm/desc.h> |
890ca9ae | 64 | #include <asm/mce.h> |
f89e32e0 | 65 | #include <linux/kernel_stat.h> |
78f7f1e5 | 66 | #include <asm/fpu/internal.h> /* Ugh! */ |
1d5f066e | 67 | #include <asm/pvclock.h> |
217fc9cf | 68 | #include <asm/div64.h> |
efc64404 | 69 | #include <asm/irq_remapping.h> |
043405e1 | 70 | |
313a3dc7 | 71 | #define MAX_IO_MSRS 256 |
890ca9ae | 72 | #define KVM_MAX_MCE_BANKS 32 |
5854dbca | 73 | #define KVM_MCE_CAP_SUPPORTED (MCG_CTL_P | MCG_SER_P) |
890ca9ae | 74 | |
0f65dd70 AK |
75 | #define emul_to_vcpu(ctxt) \ |
76 | container_of(ctxt, struct kvm_vcpu, arch.emulate_ctxt) | |
77 | ||
50a37eb4 JR |
78 | /* EFER defaults: |
79 | * - enable syscall per default because its emulated by KVM | |
80 | * - enable LME and LMA per default on 64 bit KVM | |
81 | */ | |
82 | #ifdef CONFIG_X86_64 | |
1260edbe LJ |
83 | static |
84 | u64 __read_mostly efer_reserved_bits = ~((u64)(EFER_SCE | EFER_LME | EFER_LMA)); | |
50a37eb4 | 85 | #else |
1260edbe | 86 | static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE); |
50a37eb4 | 87 | #endif |
313a3dc7 | 88 | |
ba1389b7 AK |
89 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
90 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 91 | |
cb142eb7 | 92 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
7460fb4a | 93 | static void process_nmi(struct kvm_vcpu *vcpu); |
ee2cd4b7 | 94 | static void enter_smm(struct kvm_vcpu *vcpu); |
6addfc42 | 95 | static void __kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); |
674eea0f | 96 | |
893590c7 | 97 | struct kvm_x86_ops *kvm_x86_ops __read_mostly; |
5fdbf976 | 98 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 99 | |
893590c7 | 100 | static bool __read_mostly ignore_msrs = 0; |
476bc001 | 101 | module_param(ignore_msrs, bool, S_IRUGO | S_IWUSR); |
ed85c068 | 102 | |
9ed96e87 MT |
103 | unsigned int min_timer_period_us = 500; |
104 | module_param(min_timer_period_us, uint, S_IRUGO | S_IWUSR); | |
105 | ||
630994b3 MT |
106 | static bool __read_mostly kvmclock_periodic_sync = true; |
107 | module_param(kvmclock_periodic_sync, bool, S_IRUGO); | |
108 | ||
893590c7 | 109 | bool __read_mostly kvm_has_tsc_control; |
92a1f12d | 110 | EXPORT_SYMBOL_GPL(kvm_has_tsc_control); |
893590c7 | 111 | u32 __read_mostly kvm_max_guest_tsc_khz; |
92a1f12d | 112 | EXPORT_SYMBOL_GPL(kvm_max_guest_tsc_khz); |
bc9b961b HZ |
113 | u8 __read_mostly kvm_tsc_scaling_ratio_frac_bits; |
114 | EXPORT_SYMBOL_GPL(kvm_tsc_scaling_ratio_frac_bits); | |
115 | u64 __read_mostly kvm_max_tsc_scaling_ratio; | |
116 | EXPORT_SYMBOL_GPL(kvm_max_tsc_scaling_ratio); | |
ad721883 | 117 | static u64 __read_mostly kvm_default_tsc_scaling_ratio; |
92a1f12d | 118 | |
cc578287 | 119 | /* tsc tolerance in parts per million - default to 1/2 of the NTP threshold */ |
893590c7 | 120 | static u32 __read_mostly tsc_tolerance_ppm = 250; |
cc578287 ZA |
121 | module_param(tsc_tolerance_ppm, uint, S_IRUGO | S_IWUSR); |
122 | ||
d0659d94 | 123 | /* lapic timer advance (tscdeadline mode only) in nanoseconds */ |
893590c7 | 124 | unsigned int __read_mostly lapic_timer_advance_ns = 0; |
d0659d94 MT |
125 | module_param(lapic_timer_advance_ns, uint, S_IRUGO | S_IWUSR); |
126 | ||
52004014 FW |
127 | static bool __read_mostly vector_hashing = true; |
128 | module_param(vector_hashing, bool, S_IRUGO); | |
129 | ||
893590c7 | 130 | static bool __read_mostly backwards_tsc_observed = false; |
16a96021 | 131 | |
18863bdd AK |
132 | #define KVM_NR_SHARED_MSRS 16 |
133 | ||
134 | struct kvm_shared_msrs_global { | |
135 | int nr; | |
2bf78fa7 | 136 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
137 | }; |
138 | ||
139 | struct kvm_shared_msrs { | |
140 | struct user_return_notifier urn; | |
141 | bool registered; | |
2bf78fa7 SY |
142 | struct kvm_shared_msr_values { |
143 | u64 host; | |
144 | u64 curr; | |
145 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
146 | }; |
147 | ||
148 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
013f6a5d | 149 | static struct kvm_shared_msrs __percpu *shared_msrs; |
18863bdd | 150 | |
417bc304 | 151 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
152 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
153 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
154 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
155 | { "invlpg", VCPU_STAT(invlpg) }, | |
156 | { "exits", VCPU_STAT(exits) }, | |
157 | { "io_exits", VCPU_STAT(io_exits) }, | |
158 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
159 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
160 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 161 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 | 162 | { "halt_exits", VCPU_STAT(halt_exits) }, |
f7819512 | 163 | { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, |
62bea5bf | 164 | { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) }, |
3491caf2 | 165 | { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) }, |
ba1389b7 | 166 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f11c3a8d | 167 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
168 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
169 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
170 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
171 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
172 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
173 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
174 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 175 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 176 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
177 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
178 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
179 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
180 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
181 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
182 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 183 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 184 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 185 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 186 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
187 | { NULL } |
188 | }; | |
189 | ||
2acf923e DC |
190 | u64 __read_mostly host_xcr0; |
191 | ||
b6785def | 192 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt); |
d6aa1000 | 193 | |
af585b92 GN |
194 | static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu) |
195 | { | |
196 | int i; | |
197 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU); i++) | |
198 | vcpu->arch.apf.gfns[i] = ~0; | |
199 | } | |
200 | ||
18863bdd AK |
201 | static void kvm_on_user_return(struct user_return_notifier *urn) |
202 | { | |
203 | unsigned slot; | |
18863bdd AK |
204 | struct kvm_shared_msrs *locals |
205 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 206 | struct kvm_shared_msr_values *values; |
18863bdd AK |
207 | |
208 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { | |
2bf78fa7 SY |
209 | values = &locals->values[slot]; |
210 | if (values->host != values->curr) { | |
211 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
212 | values->curr = values->host; | |
18863bdd AK |
213 | } |
214 | } | |
215 | locals->registered = false; | |
216 | user_return_notifier_unregister(urn); | |
217 | } | |
218 | ||
2bf78fa7 | 219 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 220 | { |
18863bdd | 221 | u64 value; |
013f6a5d MT |
222 | unsigned int cpu = smp_processor_id(); |
223 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
18863bdd | 224 | |
2bf78fa7 SY |
225 | /* only read, and nobody should modify it at this time, |
226 | * so don't need lock */ | |
227 | if (slot >= shared_msrs_global.nr) { | |
228 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
229 | return; | |
230 | } | |
231 | rdmsrl_safe(msr, &value); | |
232 | smsr->values[slot].host = value; | |
233 | smsr->values[slot].curr = value; | |
234 | } | |
235 | ||
236 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
237 | { | |
0123be42 | 238 | BUG_ON(slot >= KVM_NR_SHARED_MSRS); |
c847fe88 | 239 | shared_msrs_global.msrs[slot] = msr; |
18863bdd AK |
240 | if (slot >= shared_msrs_global.nr) |
241 | shared_msrs_global.nr = slot + 1; | |
18863bdd AK |
242 | } |
243 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
244 | ||
245 | static void kvm_shared_msr_cpu_online(void) | |
246 | { | |
247 | unsigned i; | |
18863bdd AK |
248 | |
249 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 250 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
251 | } |
252 | ||
8b3c3104 | 253 | int kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd | 254 | { |
013f6a5d MT |
255 | unsigned int cpu = smp_processor_id(); |
256 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
8b3c3104 | 257 | int err; |
18863bdd | 258 | |
2bf78fa7 | 259 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
8b3c3104 | 260 | return 0; |
2bf78fa7 | 261 | smsr->values[slot].curr = value; |
8b3c3104 AH |
262 | err = wrmsrl_safe(shared_msrs_global.msrs[slot], value); |
263 | if (err) | |
264 | return 1; | |
265 | ||
18863bdd AK |
266 | if (!smsr->registered) { |
267 | smsr->urn.on_user_return = kvm_on_user_return; | |
268 | user_return_notifier_register(&smsr->urn); | |
269 | smsr->registered = true; | |
270 | } | |
8b3c3104 | 271 | return 0; |
18863bdd AK |
272 | } |
273 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
274 | ||
13a34e06 | 275 | static void drop_user_return_notifiers(void) |
3548bab5 | 276 | { |
013f6a5d MT |
277 | unsigned int cpu = smp_processor_id(); |
278 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
3548bab5 AK |
279 | |
280 | if (smsr->registered) | |
281 | kvm_on_user_return(&smsr->urn); | |
282 | } | |
283 | ||
6866b83e CO |
284 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
285 | { | |
8a5a87d9 | 286 | return vcpu->arch.apic_base; |
6866b83e CO |
287 | } |
288 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
289 | ||
58cb628d JK |
290 | int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
291 | { | |
292 | u64 old_state = vcpu->arch.apic_base & | |
293 | (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); | |
294 | u64 new_state = msr_info->data & | |
295 | (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); | |
296 | u64 reserved_bits = ((~0ULL) << cpuid_maxphyaddr(vcpu)) | | |
297 | 0x2ff | (guest_cpuid_has_x2apic(vcpu) ? 0 : X2APIC_ENABLE); | |
298 | ||
299 | if (!msr_info->host_initiated && | |
300 | ((msr_info->data & reserved_bits) != 0 || | |
301 | new_state == X2APIC_ENABLE || | |
302 | (new_state == MSR_IA32_APICBASE_ENABLE && | |
303 | old_state == (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE)) || | |
304 | (new_state == (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE) && | |
305 | old_state == 0))) | |
306 | return 1; | |
307 | ||
308 | kvm_lapic_set_base(vcpu, msr_info->data); | |
309 | return 0; | |
6866b83e CO |
310 | } |
311 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
312 | ||
2605fc21 | 313 | asmlinkage __visible void kvm_spurious_fault(void) |
e3ba45b8 GL |
314 | { |
315 | /* Fault while not rebooting. We want the trace. */ | |
316 | BUG(); | |
317 | } | |
318 | EXPORT_SYMBOL_GPL(kvm_spurious_fault); | |
319 | ||
3fd28fce ED |
320 | #define EXCPT_BENIGN 0 |
321 | #define EXCPT_CONTRIBUTORY 1 | |
322 | #define EXCPT_PF 2 | |
323 | ||
324 | static int exception_class(int vector) | |
325 | { | |
326 | switch (vector) { | |
327 | case PF_VECTOR: | |
328 | return EXCPT_PF; | |
329 | case DE_VECTOR: | |
330 | case TS_VECTOR: | |
331 | case NP_VECTOR: | |
332 | case SS_VECTOR: | |
333 | case GP_VECTOR: | |
334 | return EXCPT_CONTRIBUTORY; | |
335 | default: | |
336 | break; | |
337 | } | |
338 | return EXCPT_BENIGN; | |
339 | } | |
340 | ||
d6e8c854 NA |
341 | #define EXCPT_FAULT 0 |
342 | #define EXCPT_TRAP 1 | |
343 | #define EXCPT_ABORT 2 | |
344 | #define EXCPT_INTERRUPT 3 | |
345 | ||
346 | static int exception_type(int vector) | |
347 | { | |
348 | unsigned int mask; | |
349 | ||
350 | if (WARN_ON(vector > 31 || vector == NMI_VECTOR)) | |
351 | return EXCPT_INTERRUPT; | |
352 | ||
353 | mask = 1 << vector; | |
354 | ||
355 | /* #DB is trap, as instruction watchpoints are handled elsewhere */ | |
356 | if (mask & ((1 << DB_VECTOR) | (1 << BP_VECTOR) | (1 << OF_VECTOR))) | |
357 | return EXCPT_TRAP; | |
358 | ||
359 | if (mask & ((1 << DF_VECTOR) | (1 << MC_VECTOR))) | |
360 | return EXCPT_ABORT; | |
361 | ||
362 | /* Reserved exceptions will result in fault */ | |
363 | return EXCPT_FAULT; | |
364 | } | |
365 | ||
3fd28fce | 366 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, |
ce7ddec4 JR |
367 | unsigned nr, bool has_error, u32 error_code, |
368 | bool reinject) | |
3fd28fce ED |
369 | { |
370 | u32 prev_nr; | |
371 | int class1, class2; | |
372 | ||
3842d135 AK |
373 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
374 | ||
3fd28fce ED |
375 | if (!vcpu->arch.exception.pending) { |
376 | queue: | |
3ffb2468 NA |
377 | if (has_error && !is_protmode(vcpu)) |
378 | has_error = false; | |
3fd28fce ED |
379 | vcpu->arch.exception.pending = true; |
380 | vcpu->arch.exception.has_error_code = has_error; | |
381 | vcpu->arch.exception.nr = nr; | |
382 | vcpu->arch.exception.error_code = error_code; | |
3f0fd292 | 383 | vcpu->arch.exception.reinject = reinject; |
3fd28fce ED |
384 | return; |
385 | } | |
386 | ||
387 | /* to check exception */ | |
388 | prev_nr = vcpu->arch.exception.nr; | |
389 | if (prev_nr == DF_VECTOR) { | |
390 | /* triple fault -> shutdown */ | |
a8eeb04a | 391 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
3fd28fce ED |
392 | return; |
393 | } | |
394 | class1 = exception_class(prev_nr); | |
395 | class2 = exception_class(nr); | |
396 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
397 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
398 | /* generate double fault per SDM Table 5-5 */ | |
399 | vcpu->arch.exception.pending = true; | |
400 | vcpu->arch.exception.has_error_code = true; | |
401 | vcpu->arch.exception.nr = DF_VECTOR; | |
402 | vcpu->arch.exception.error_code = 0; | |
403 | } else | |
404 | /* replace previous exception with a new one in a hope | |
405 | that instruction re-execution will regenerate lost | |
406 | exception */ | |
407 | goto queue; | |
408 | } | |
409 | ||
298101da AK |
410 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
411 | { | |
ce7ddec4 | 412 | kvm_multiple_exception(vcpu, nr, false, 0, false); |
298101da AK |
413 | } |
414 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
415 | ||
ce7ddec4 JR |
416 | void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
417 | { | |
418 | kvm_multiple_exception(vcpu, nr, false, 0, true); | |
419 | } | |
420 | EXPORT_SYMBOL_GPL(kvm_requeue_exception); | |
421 | ||
db8fcefa | 422 | void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err) |
c3c91fee | 423 | { |
db8fcefa AP |
424 | if (err) |
425 | kvm_inject_gp(vcpu, 0); | |
426 | else | |
427 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
428 | } | |
429 | EXPORT_SYMBOL_GPL(kvm_complete_insn_gp); | |
8df25a32 | 430 | |
6389ee94 | 431 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
c3c91fee AK |
432 | { |
433 | ++vcpu->stat.pf_guest; | |
6389ee94 AK |
434 | vcpu->arch.cr2 = fault->address; |
435 | kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code); | |
c3c91fee | 436 | } |
27d6c865 | 437 | EXPORT_SYMBOL_GPL(kvm_inject_page_fault); |
c3c91fee | 438 | |
ef54bcfe | 439 | static bool kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
d4f8cf66 | 440 | { |
6389ee94 AK |
441 | if (mmu_is_nested(vcpu) && !fault->nested_page_fault) |
442 | vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault); | |
d4f8cf66 | 443 | else |
6389ee94 | 444 | vcpu->arch.mmu.inject_page_fault(vcpu, fault); |
ef54bcfe PB |
445 | |
446 | return fault->nested_page_fault; | |
d4f8cf66 JR |
447 | } |
448 | ||
3419ffc8 SY |
449 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
450 | { | |
7460fb4a AK |
451 | atomic_inc(&vcpu->arch.nmi_queued); |
452 | kvm_make_request(KVM_REQ_NMI, vcpu); | |
3419ffc8 SY |
453 | } |
454 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
455 | ||
298101da AK |
456 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
457 | { | |
ce7ddec4 | 458 | kvm_multiple_exception(vcpu, nr, true, error_code, false); |
298101da AK |
459 | } |
460 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
461 | ||
ce7ddec4 JR |
462 | void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
463 | { | |
464 | kvm_multiple_exception(vcpu, nr, true, error_code, true); | |
465 | } | |
466 | EXPORT_SYMBOL_GPL(kvm_requeue_exception_e); | |
467 | ||
0a79b009 AK |
468 | /* |
469 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
470 | * a #GP and return false. | |
471 | */ | |
472 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 473 | { |
0a79b009 AK |
474 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
475 | return true; | |
476 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
477 | return false; | |
298101da | 478 | } |
0a79b009 | 479 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 480 | |
16f8a6f9 NA |
481 | bool kvm_require_dr(struct kvm_vcpu *vcpu, int dr) |
482 | { | |
483 | if ((dr != 4 && dr != 5) || !kvm_read_cr4_bits(vcpu, X86_CR4_DE)) | |
484 | return true; | |
485 | ||
486 | kvm_queue_exception(vcpu, UD_VECTOR); | |
487 | return false; | |
488 | } | |
489 | EXPORT_SYMBOL_GPL(kvm_require_dr); | |
490 | ||
ec92fe44 JR |
491 | /* |
492 | * This function will be used to read from the physical memory of the currently | |
54bf36aa | 493 | * running guest. The difference to kvm_vcpu_read_guest_page is that this function |
ec92fe44 JR |
494 | * can read from guest physical or from the guest's guest physical memory. |
495 | */ | |
496 | int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, | |
497 | gfn_t ngfn, void *data, int offset, int len, | |
498 | u32 access) | |
499 | { | |
54987b7a | 500 | struct x86_exception exception; |
ec92fe44 JR |
501 | gfn_t real_gfn; |
502 | gpa_t ngpa; | |
503 | ||
504 | ngpa = gfn_to_gpa(ngfn); | |
54987b7a | 505 | real_gfn = mmu->translate_gpa(vcpu, ngpa, access, &exception); |
ec92fe44 JR |
506 | if (real_gfn == UNMAPPED_GVA) |
507 | return -EFAULT; | |
508 | ||
509 | real_gfn = gpa_to_gfn(real_gfn); | |
510 | ||
54bf36aa | 511 | return kvm_vcpu_read_guest_page(vcpu, real_gfn, data, offset, len); |
ec92fe44 JR |
512 | } |
513 | EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu); | |
514 | ||
69b0049a | 515 | static int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, |
3d06b8bf JR |
516 | void *data, int offset, int len, u32 access) |
517 | { | |
518 | return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn, | |
519 | data, offset, len, access); | |
520 | } | |
521 | ||
a03490ed CO |
522 | /* |
523 | * Load the pae pdptrs. Return true is they are all valid. | |
524 | */ | |
ff03a073 | 525 | int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3) |
a03490ed CO |
526 | { |
527 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
528 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
529 | int i; | |
530 | int ret; | |
ff03a073 | 531 | u64 pdpte[ARRAY_SIZE(mmu->pdptrs)]; |
a03490ed | 532 | |
ff03a073 JR |
533 | ret = kvm_read_guest_page_mmu(vcpu, mmu, pdpt_gfn, pdpte, |
534 | offset * sizeof(u64), sizeof(pdpte), | |
535 | PFERR_USER_MASK|PFERR_WRITE_MASK); | |
a03490ed CO |
536 | if (ret < 0) { |
537 | ret = 0; | |
538 | goto out; | |
539 | } | |
540 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
43a3795a | 541 | if (is_present_gpte(pdpte[i]) && |
a0a64f50 XG |
542 | (pdpte[i] & |
543 | vcpu->arch.mmu.guest_rsvd_check.rsvd_bits_mask[0][2])) { | |
a03490ed CO |
544 | ret = 0; |
545 | goto out; | |
546 | } | |
547 | } | |
548 | ret = 1; | |
549 | ||
ff03a073 | 550 | memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs)); |
6de4f3ad AK |
551 | __set_bit(VCPU_EXREG_PDPTR, |
552 | (unsigned long *)&vcpu->arch.regs_avail); | |
553 | __set_bit(VCPU_EXREG_PDPTR, | |
554 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 555 | out: |
a03490ed CO |
556 | |
557 | return ret; | |
558 | } | |
cc4b6871 | 559 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 560 | |
d835dfec AK |
561 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
562 | { | |
ff03a073 | 563 | u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)]; |
d835dfec | 564 | bool changed = true; |
3d06b8bf JR |
565 | int offset; |
566 | gfn_t gfn; | |
d835dfec AK |
567 | int r; |
568 | ||
569 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
570 | return false; | |
571 | ||
6de4f3ad AK |
572 | if (!test_bit(VCPU_EXREG_PDPTR, |
573 | (unsigned long *)&vcpu->arch.regs_avail)) | |
574 | return true; | |
575 | ||
9f8fe504 AK |
576 | gfn = (kvm_read_cr3(vcpu) & ~31u) >> PAGE_SHIFT; |
577 | offset = (kvm_read_cr3(vcpu) & ~31u) & (PAGE_SIZE - 1); | |
3d06b8bf JR |
578 | r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte), |
579 | PFERR_USER_MASK | PFERR_WRITE_MASK); | |
d835dfec AK |
580 | if (r < 0) |
581 | goto out; | |
ff03a073 | 582 | changed = memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 583 | out: |
d835dfec AK |
584 | |
585 | return changed; | |
586 | } | |
587 | ||
49a9b07e | 588 | int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed | 589 | { |
aad82703 | 590 | unsigned long old_cr0 = kvm_read_cr0(vcpu); |
d81135a5 | 591 | unsigned long update_bits = X86_CR0_PG | X86_CR0_WP; |
aad82703 | 592 | |
f9a48e6a AK |
593 | cr0 |= X86_CR0_ET; |
594 | ||
ab344828 | 595 | #ifdef CONFIG_X86_64 |
0f12244f GN |
596 | if (cr0 & 0xffffffff00000000UL) |
597 | return 1; | |
ab344828 GN |
598 | #endif |
599 | ||
600 | cr0 &= ~CR0_RESERVED_BITS; | |
a03490ed | 601 | |
0f12244f GN |
602 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) |
603 | return 1; | |
a03490ed | 604 | |
0f12244f GN |
605 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) |
606 | return 1; | |
a03490ed CO |
607 | |
608 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
609 | #ifdef CONFIG_X86_64 | |
f6801dff | 610 | if ((vcpu->arch.efer & EFER_LME)) { |
a03490ed CO |
611 | int cs_db, cs_l; |
612 | ||
0f12244f GN |
613 | if (!is_pae(vcpu)) |
614 | return 1; | |
a03490ed | 615 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
0f12244f GN |
616 | if (cs_l) |
617 | return 1; | |
a03490ed CO |
618 | } else |
619 | #endif | |
ff03a073 | 620 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
9f8fe504 | 621 | kvm_read_cr3(vcpu))) |
0f12244f | 622 | return 1; |
a03490ed CO |
623 | } |
624 | ||
ad756a16 MJ |
625 | if (!(cr0 & X86_CR0_PG) && kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE)) |
626 | return 1; | |
627 | ||
a03490ed | 628 | kvm_x86_ops->set_cr0(vcpu, cr0); |
a03490ed | 629 | |
d170c419 | 630 | if ((cr0 ^ old_cr0) & X86_CR0_PG) { |
e5f3f027 | 631 | kvm_clear_async_pf_completion_queue(vcpu); |
d170c419 LJ |
632 | kvm_async_pf_hash_reset(vcpu); |
633 | } | |
e5f3f027 | 634 | |
aad82703 SY |
635 | if ((cr0 ^ old_cr0) & update_bits) |
636 | kvm_mmu_reset_context(vcpu); | |
b18d5431 | 637 | |
879ae188 LE |
638 | if (((cr0 ^ old_cr0) & X86_CR0_CD) && |
639 | kvm_arch_has_noncoherent_dma(vcpu->kvm) && | |
640 | !kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED)) | |
b18d5431 XG |
641 | kvm_zap_gfn_range(vcpu->kvm, 0, ~0ULL); |
642 | ||
0f12244f GN |
643 | return 0; |
644 | } | |
2d3ad1f4 | 645 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 646 | |
2d3ad1f4 | 647 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 648 | { |
49a9b07e | 649 | (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f)); |
a03490ed | 650 | } |
2d3ad1f4 | 651 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 652 | |
42bdf991 MT |
653 | static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu) |
654 | { | |
655 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) && | |
656 | !vcpu->guest_xcr0_loaded) { | |
657 | /* kvm_set_xcr() also depends on this */ | |
658 | xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0); | |
659 | vcpu->guest_xcr0_loaded = 1; | |
660 | } | |
661 | } | |
662 | ||
663 | static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu) | |
664 | { | |
665 | if (vcpu->guest_xcr0_loaded) { | |
666 | if (vcpu->arch.xcr0 != host_xcr0) | |
667 | xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0); | |
668 | vcpu->guest_xcr0_loaded = 0; | |
669 | } | |
670 | } | |
671 | ||
69b0049a | 672 | static int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) |
2acf923e | 673 | { |
56c103ec LJ |
674 | u64 xcr0 = xcr; |
675 | u64 old_xcr0 = vcpu->arch.xcr0; | |
46c34cb0 | 676 | u64 valid_bits; |
2acf923e DC |
677 | |
678 | /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */ | |
679 | if (index != XCR_XFEATURE_ENABLED_MASK) | |
680 | return 1; | |
d91cab78 | 681 | if (!(xcr0 & XFEATURE_MASK_FP)) |
2acf923e | 682 | return 1; |
d91cab78 | 683 | if ((xcr0 & XFEATURE_MASK_YMM) && !(xcr0 & XFEATURE_MASK_SSE)) |
2acf923e | 684 | return 1; |
46c34cb0 PB |
685 | |
686 | /* | |
687 | * Do not allow the guest to set bits that we do not support | |
688 | * saving. However, xcr0 bit 0 is always set, even if the | |
689 | * emulated CPU does not support XSAVE (see fx_init). | |
690 | */ | |
d91cab78 | 691 | valid_bits = vcpu->arch.guest_supported_xcr0 | XFEATURE_MASK_FP; |
46c34cb0 | 692 | if (xcr0 & ~valid_bits) |
2acf923e | 693 | return 1; |
46c34cb0 | 694 | |
d91cab78 DH |
695 | if ((!(xcr0 & XFEATURE_MASK_BNDREGS)) != |
696 | (!(xcr0 & XFEATURE_MASK_BNDCSR))) | |
390bd528 LJ |
697 | return 1; |
698 | ||
d91cab78 DH |
699 | if (xcr0 & XFEATURE_MASK_AVX512) { |
700 | if (!(xcr0 & XFEATURE_MASK_YMM)) | |
612263b3 | 701 | return 1; |
d91cab78 | 702 | if ((xcr0 & XFEATURE_MASK_AVX512) != XFEATURE_MASK_AVX512) |
612263b3 CP |
703 | return 1; |
704 | } | |
2acf923e | 705 | vcpu->arch.xcr0 = xcr0; |
56c103ec | 706 | |
d91cab78 | 707 | if ((xcr0 ^ old_xcr0) & XFEATURE_MASK_EXTEND) |
56c103ec | 708 | kvm_update_cpuid(vcpu); |
2acf923e DC |
709 | return 0; |
710 | } | |
711 | ||
712 | int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) | |
713 | { | |
764bcbc5 Z |
714 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || |
715 | __kvm_set_xcr(vcpu, index, xcr)) { | |
2acf923e DC |
716 | kvm_inject_gp(vcpu, 0); |
717 | return 1; | |
718 | } | |
719 | return 0; | |
720 | } | |
721 | EXPORT_SYMBOL_GPL(kvm_set_xcr); | |
722 | ||
a83b29c6 | 723 | int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 724 | { |
fc78f519 | 725 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
0be0226f | 726 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE | |
b9baba86 | 727 | X86_CR4_SMEP | X86_CR4_SMAP | X86_CR4_PKE; |
0be0226f | 728 | |
0f12244f GN |
729 | if (cr4 & CR4_RESERVED_BITS) |
730 | return 1; | |
a03490ed | 731 | |
2acf923e DC |
732 | if (!guest_cpuid_has_xsave(vcpu) && (cr4 & X86_CR4_OSXSAVE)) |
733 | return 1; | |
734 | ||
c68b734f YW |
735 | if (!guest_cpuid_has_smep(vcpu) && (cr4 & X86_CR4_SMEP)) |
736 | return 1; | |
737 | ||
97ec8c06 FW |
738 | if (!guest_cpuid_has_smap(vcpu) && (cr4 & X86_CR4_SMAP)) |
739 | return 1; | |
740 | ||
afcbf13f | 741 | if (!guest_cpuid_has_fsgsbase(vcpu) && (cr4 & X86_CR4_FSGSBASE)) |
74dc2b4f YW |
742 | return 1; |
743 | ||
b9baba86 HH |
744 | if (!guest_cpuid_has_pku(vcpu) && (cr4 & X86_CR4_PKE)) |
745 | return 1; | |
746 | ||
a03490ed | 747 | if (is_long_mode(vcpu)) { |
0f12244f GN |
748 | if (!(cr4 & X86_CR4_PAE)) |
749 | return 1; | |
a2edf57f AK |
750 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
751 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
9f8fe504 AK |
752 | && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
753 | kvm_read_cr3(vcpu))) | |
0f12244f GN |
754 | return 1; |
755 | ||
ad756a16 MJ |
756 | if ((cr4 & X86_CR4_PCIDE) && !(old_cr4 & X86_CR4_PCIDE)) { |
757 | if (!guest_cpuid_has_pcid(vcpu)) | |
758 | return 1; | |
759 | ||
760 | /* PCID can not be enabled when cr3[11:0]!=000H or EFER.LMA=0 */ | |
761 | if ((kvm_read_cr3(vcpu) & X86_CR3_PCID_MASK) || !is_long_mode(vcpu)) | |
762 | return 1; | |
763 | } | |
764 | ||
5e1746d6 | 765 | if (kvm_x86_ops->set_cr4(vcpu, cr4)) |
0f12244f | 766 | return 1; |
a03490ed | 767 | |
ad756a16 MJ |
768 | if (((cr4 ^ old_cr4) & pdptr_bits) || |
769 | (!(cr4 & X86_CR4_PCIDE) && (old_cr4 & X86_CR4_PCIDE))) | |
aad82703 | 770 | kvm_mmu_reset_context(vcpu); |
0f12244f | 771 | |
b9baba86 | 772 | if ((cr4 ^ old_cr4) & (X86_CR4_OSXSAVE | X86_CR4_PKE)) |
00b27a3e | 773 | kvm_update_cpuid(vcpu); |
2acf923e | 774 | |
0f12244f GN |
775 | return 0; |
776 | } | |
2d3ad1f4 | 777 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 778 | |
2390218b | 779 | int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 780 | { |
ac146235 | 781 | #ifdef CONFIG_X86_64 |
9d88fca7 | 782 | cr3 &= ~CR3_PCID_INVD; |
ac146235 | 783 | #endif |
9d88fca7 | 784 | |
9f8fe504 | 785 | if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) { |
0ba73cda | 786 | kvm_mmu_sync_roots(vcpu); |
77c3913b | 787 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
0f12244f | 788 | return 0; |
d835dfec AK |
789 | } |
790 | ||
a03490ed | 791 | if (is_long_mode(vcpu)) { |
d9f89b88 JK |
792 | if (cr3 & CR3_L_MODE_RESERVED_BITS) |
793 | return 1; | |
794 | } else if (is_pae(vcpu) && is_paging(vcpu) && | |
795 | !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) | |
346874c9 | 796 | return 1; |
a03490ed | 797 | |
0f12244f | 798 | vcpu->arch.cr3 = cr3; |
aff48baa | 799 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
d8d173da | 800 | kvm_mmu_new_cr3(vcpu); |
0f12244f GN |
801 | return 0; |
802 | } | |
2d3ad1f4 | 803 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 804 | |
eea1cff9 | 805 | int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed | 806 | { |
0f12244f GN |
807 | if (cr8 & CR8_RESERVED_BITS) |
808 | return 1; | |
35754c98 | 809 | if (lapic_in_kernel(vcpu)) |
a03490ed CO |
810 | kvm_lapic_set_tpr(vcpu, cr8); |
811 | else | |
ad312c7c | 812 | vcpu->arch.cr8 = cr8; |
0f12244f GN |
813 | return 0; |
814 | } | |
2d3ad1f4 | 815 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 816 | |
2d3ad1f4 | 817 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed | 818 | { |
35754c98 | 819 | if (lapic_in_kernel(vcpu)) |
a03490ed CO |
820 | return kvm_lapic_get_cr8(vcpu); |
821 | else | |
ad312c7c | 822 | return vcpu->arch.cr8; |
a03490ed | 823 | } |
2d3ad1f4 | 824 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 825 | |
ae561ede NA |
826 | static void kvm_update_dr0123(struct kvm_vcpu *vcpu) |
827 | { | |
828 | int i; | |
829 | ||
830 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) { | |
831 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
832 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
833 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_RELOAD; | |
834 | } | |
835 | } | |
836 | ||
73aaf249 JK |
837 | static void kvm_update_dr6(struct kvm_vcpu *vcpu) |
838 | { | |
839 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
840 | kvm_x86_ops->set_dr6(vcpu, vcpu->arch.dr6); | |
841 | } | |
842 | ||
c8639010 JK |
843 | static void kvm_update_dr7(struct kvm_vcpu *vcpu) |
844 | { | |
845 | unsigned long dr7; | |
846 | ||
847 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) | |
848 | dr7 = vcpu->arch.guest_debug_dr7; | |
849 | else | |
850 | dr7 = vcpu->arch.dr7; | |
851 | kvm_x86_ops->set_dr7(vcpu, dr7); | |
360b948d PB |
852 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_BP_ENABLED; |
853 | if (dr7 & DR7_BP_EN_MASK) | |
854 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_BP_ENABLED; | |
c8639010 JK |
855 | } |
856 | ||
6f43ed01 NA |
857 | static u64 kvm_dr6_fixed(struct kvm_vcpu *vcpu) |
858 | { | |
859 | u64 fixed = DR6_FIXED_1; | |
860 | ||
861 | if (!guest_cpuid_has_rtm(vcpu)) | |
862 | fixed |= DR6_RTM; | |
863 | return fixed; | |
864 | } | |
865 | ||
338dbc97 | 866 | static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
020df079 GN |
867 | { |
868 | switch (dr) { | |
869 | case 0 ... 3: | |
870 | vcpu->arch.db[dr] = val; | |
871 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
872 | vcpu->arch.eff_db[dr] = val; | |
873 | break; | |
874 | case 4: | |
020df079 GN |
875 | /* fall through */ |
876 | case 6: | |
338dbc97 GN |
877 | if (val & 0xffffffff00000000ULL) |
878 | return -1; /* #GP */ | |
6f43ed01 | 879 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | kvm_dr6_fixed(vcpu); |
73aaf249 | 880 | kvm_update_dr6(vcpu); |
020df079 GN |
881 | break; |
882 | case 5: | |
020df079 GN |
883 | /* fall through */ |
884 | default: /* 7 */ | |
338dbc97 GN |
885 | if (val & 0xffffffff00000000ULL) |
886 | return -1; /* #GP */ | |
020df079 | 887 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; |
c8639010 | 888 | kvm_update_dr7(vcpu); |
020df079 GN |
889 | break; |
890 | } | |
891 | ||
892 | return 0; | |
893 | } | |
338dbc97 GN |
894 | |
895 | int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) | |
896 | { | |
16f8a6f9 | 897 | if (__kvm_set_dr(vcpu, dr, val)) { |
338dbc97 | 898 | kvm_inject_gp(vcpu, 0); |
16f8a6f9 NA |
899 | return 1; |
900 | } | |
901 | return 0; | |
338dbc97 | 902 | } |
020df079 GN |
903 | EXPORT_SYMBOL_GPL(kvm_set_dr); |
904 | ||
16f8a6f9 | 905 | int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) |
020df079 GN |
906 | { |
907 | switch (dr) { | |
908 | case 0 ... 3: | |
909 | *val = vcpu->arch.db[dr]; | |
910 | break; | |
911 | case 4: | |
020df079 GN |
912 | /* fall through */ |
913 | case 6: | |
73aaf249 JK |
914 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
915 | *val = vcpu->arch.dr6; | |
916 | else | |
917 | *val = kvm_x86_ops->get_dr6(vcpu); | |
020df079 GN |
918 | break; |
919 | case 5: | |
020df079 GN |
920 | /* fall through */ |
921 | default: /* 7 */ | |
922 | *val = vcpu->arch.dr7; | |
923 | break; | |
924 | } | |
338dbc97 GN |
925 | return 0; |
926 | } | |
020df079 GN |
927 | EXPORT_SYMBOL_GPL(kvm_get_dr); |
928 | ||
022cd0e8 AK |
929 | bool kvm_rdpmc(struct kvm_vcpu *vcpu) |
930 | { | |
931 | u32 ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
932 | u64 data; | |
933 | int err; | |
934 | ||
c6702c9d | 935 | err = kvm_pmu_rdpmc(vcpu, ecx, &data); |
022cd0e8 AK |
936 | if (err) |
937 | return err; | |
938 | kvm_register_write(vcpu, VCPU_REGS_RAX, (u32)data); | |
939 | kvm_register_write(vcpu, VCPU_REGS_RDX, data >> 32); | |
940 | return err; | |
941 | } | |
942 | EXPORT_SYMBOL_GPL(kvm_rdpmc); | |
943 | ||
043405e1 CO |
944 | /* |
945 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
946 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
947 | * | |
948 | * This list is modified at module load time to reflect the | |
e3267cbb | 949 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
62ef68bb PB |
950 | * kvm-specific. Those are put in emulated_msrs; filtering of emulated_msrs |
951 | * may depend on host virtualization features rather than host cpu features. | |
043405e1 | 952 | */ |
e3267cbb | 953 | |
043405e1 CO |
954 | static u32 msrs_to_save[] = { |
955 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
8c06585d | 956 | MSR_STAR, |
043405e1 CO |
957 | #ifdef CONFIG_X86_64 |
958 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
959 | #endif | |
b3897a49 | 960 | MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA, |
9dbe6cf9 | 961 | MSR_IA32_FEATURE_CONTROL, MSR_IA32_BNDCFGS, MSR_TSC_AUX, |
043405e1 CO |
962 | }; |
963 | ||
964 | static unsigned num_msrs_to_save; | |
965 | ||
62ef68bb PB |
966 | static u32 emulated_msrs[] = { |
967 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, | |
968 | MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW, | |
969 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, | |
970 | HV_X64_MSR_TIME_REF_COUNT, HV_X64_MSR_REFERENCE_TSC, | |
e7d9513b AS |
971 | HV_X64_MSR_CRASH_P0, HV_X64_MSR_CRASH_P1, HV_X64_MSR_CRASH_P2, |
972 | HV_X64_MSR_CRASH_P3, HV_X64_MSR_CRASH_P4, HV_X64_MSR_CRASH_CTL, | |
e516cebb | 973 | HV_X64_MSR_RESET, |
11c4b1ca | 974 | HV_X64_MSR_VP_INDEX, |
9eec50b8 | 975 | HV_X64_MSR_VP_RUNTIME, |
5c919412 | 976 | HV_X64_MSR_SCONTROL, |
1f4b34f8 | 977 | HV_X64_MSR_STIMER0_CONFIG, |
62ef68bb PB |
978 | HV_X64_MSR_APIC_ASSIST_PAGE, MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME, |
979 | MSR_KVM_PV_EOI_EN, | |
980 | ||
ba904635 | 981 | MSR_IA32_TSC_ADJUST, |
a3e06bbe | 982 | MSR_IA32_TSCDEADLINE, |
043405e1 | 983 | MSR_IA32_MISC_ENABLE, |
908e75f3 AK |
984 | MSR_IA32_MCG_STATUS, |
985 | MSR_IA32_MCG_CTL, | |
64d60670 | 986 | MSR_IA32_SMBASE, |
043405e1 CO |
987 | }; |
988 | ||
62ef68bb PB |
989 | static unsigned num_emulated_msrs; |
990 | ||
384bb783 | 991 | bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer) |
15c4a640 | 992 | { |
b69e8cae | 993 | if (efer & efer_reserved_bits) |
384bb783 | 994 | return false; |
15c4a640 | 995 | |
1b2fd70c AG |
996 | if (efer & EFER_FFXSR) { |
997 | struct kvm_cpuid_entry2 *feat; | |
998 | ||
999 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae | 1000 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) |
384bb783 | 1001 | return false; |
1b2fd70c AG |
1002 | } |
1003 | ||
d8017474 AG |
1004 | if (efer & EFER_SVME) { |
1005 | struct kvm_cpuid_entry2 *feat; | |
1006 | ||
1007 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae | 1008 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) |
384bb783 | 1009 | return false; |
d8017474 AG |
1010 | } |
1011 | ||
384bb783 JK |
1012 | return true; |
1013 | } | |
1014 | EXPORT_SYMBOL_GPL(kvm_valid_efer); | |
1015 | ||
1016 | static int set_efer(struct kvm_vcpu *vcpu, u64 efer) | |
1017 | { | |
1018 | u64 old_efer = vcpu->arch.efer; | |
1019 | ||
1020 | if (!kvm_valid_efer(vcpu, efer)) | |
1021 | return 1; | |
1022 | ||
1023 | if (is_paging(vcpu) | |
1024 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) | |
1025 | return 1; | |
1026 | ||
15c4a640 | 1027 | efer &= ~EFER_LMA; |
f6801dff | 1028 | efer |= vcpu->arch.efer & EFER_LMA; |
15c4a640 | 1029 | |
a3d204e2 SY |
1030 | kvm_x86_ops->set_efer(vcpu, efer); |
1031 | ||
aad82703 SY |
1032 | /* Update reserved bits */ |
1033 | if ((efer ^ old_efer) & EFER_NX) | |
1034 | kvm_mmu_reset_context(vcpu); | |
1035 | ||
b69e8cae | 1036 | return 0; |
15c4a640 CO |
1037 | } |
1038 | ||
f2b4b7dd JR |
1039 | void kvm_enable_efer_bits(u64 mask) |
1040 | { | |
1041 | efer_reserved_bits &= ~mask; | |
1042 | } | |
1043 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
1044 | ||
15c4a640 CO |
1045 | /* |
1046 | * Writes msr value into into the appropriate "register". | |
1047 | * Returns 0 on success, non-0 otherwise. | |
1048 | * Assumes vcpu_load() was already called. | |
1049 | */ | |
8fe8ab46 | 1050 | int kvm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
15c4a640 | 1051 | { |
854e8bb1 NA |
1052 | switch (msr->index) { |
1053 | case MSR_FS_BASE: | |
1054 | case MSR_GS_BASE: | |
1055 | case MSR_KERNEL_GS_BASE: | |
1056 | case MSR_CSTAR: | |
1057 | case MSR_LSTAR: | |
1058 | if (is_noncanonical_address(msr->data)) | |
1059 | return 1; | |
1060 | break; | |
1061 | case MSR_IA32_SYSENTER_EIP: | |
1062 | case MSR_IA32_SYSENTER_ESP: | |
1063 | /* | |
1064 | * IA32_SYSENTER_ESP and IA32_SYSENTER_EIP cause #GP if | |
1065 | * non-canonical address is written on Intel but not on | |
1066 | * AMD (which ignores the top 32-bits, because it does | |
1067 | * not implement 64-bit SYSENTER). | |
1068 | * | |
1069 | * 64-bit code should hence be able to write a non-canonical | |
1070 | * value on AMD. Making the address canonical ensures that | |
1071 | * vmentry does not fail on Intel after writing a non-canonical | |
1072 | * value, and that something deterministic happens if the guest | |
1073 | * invokes 64-bit SYSENTER. | |
1074 | */ | |
1075 | msr->data = get_canonical(msr->data); | |
1076 | } | |
8fe8ab46 | 1077 | return kvm_x86_ops->set_msr(vcpu, msr); |
15c4a640 | 1078 | } |
854e8bb1 | 1079 | EXPORT_SYMBOL_GPL(kvm_set_msr); |
15c4a640 | 1080 | |
313a3dc7 CO |
1081 | /* |
1082 | * Adapt set_msr() to msr_io()'s calling convention | |
1083 | */ | |
609e36d3 PB |
1084 | static int do_get_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1085 | { | |
1086 | struct msr_data msr; | |
1087 | int r; | |
1088 | ||
1089 | msr.index = index; | |
1090 | msr.host_initiated = true; | |
1091 | r = kvm_get_msr(vcpu, &msr); | |
1092 | if (r) | |
1093 | return r; | |
1094 | ||
1095 | *data = msr.data; | |
1096 | return 0; | |
1097 | } | |
1098 | ||
313a3dc7 CO |
1099 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1100 | { | |
8fe8ab46 WA |
1101 | struct msr_data msr; |
1102 | ||
1103 | msr.data = *data; | |
1104 | msr.index = index; | |
1105 | msr.host_initiated = true; | |
1106 | return kvm_set_msr(vcpu, &msr); | |
313a3dc7 CO |
1107 | } |
1108 | ||
16e8d74d MT |
1109 | #ifdef CONFIG_X86_64 |
1110 | struct pvclock_gtod_data { | |
1111 | seqcount_t seq; | |
1112 | ||
1113 | struct { /* extract of a clocksource struct */ | |
1114 | int vclock_mode; | |
1115 | cycle_t cycle_last; | |
1116 | cycle_t mask; | |
1117 | u32 mult; | |
1118 | u32 shift; | |
1119 | } clock; | |
1120 | ||
cbcf2dd3 TG |
1121 | u64 boot_ns; |
1122 | u64 nsec_base; | |
16e8d74d MT |
1123 | }; |
1124 | ||
1125 | static struct pvclock_gtod_data pvclock_gtod_data; | |
1126 | ||
1127 | static void update_pvclock_gtod(struct timekeeper *tk) | |
1128 | { | |
1129 | struct pvclock_gtod_data *vdata = &pvclock_gtod_data; | |
cbcf2dd3 TG |
1130 | u64 boot_ns; |
1131 | ||
876e7881 | 1132 | boot_ns = ktime_to_ns(ktime_add(tk->tkr_mono.base, tk->offs_boot)); |
16e8d74d MT |
1133 | |
1134 | write_seqcount_begin(&vdata->seq); | |
1135 | ||
1136 | /* copy pvclock gtod data */ | |
876e7881 PZ |
1137 | vdata->clock.vclock_mode = tk->tkr_mono.clock->archdata.vclock_mode; |
1138 | vdata->clock.cycle_last = tk->tkr_mono.cycle_last; | |
1139 | vdata->clock.mask = tk->tkr_mono.mask; | |
1140 | vdata->clock.mult = tk->tkr_mono.mult; | |
1141 | vdata->clock.shift = tk->tkr_mono.shift; | |
16e8d74d | 1142 | |
cbcf2dd3 | 1143 | vdata->boot_ns = boot_ns; |
876e7881 | 1144 | vdata->nsec_base = tk->tkr_mono.xtime_nsec; |
16e8d74d MT |
1145 | |
1146 | write_seqcount_end(&vdata->seq); | |
1147 | } | |
1148 | #endif | |
1149 | ||
bab5bb39 NK |
1150 | void kvm_set_pending_timer(struct kvm_vcpu *vcpu) |
1151 | { | |
1152 | /* | |
1153 | * Note: KVM_REQ_PENDING_TIMER is implicitly checked in | |
1154 | * vcpu_enter_guest. This function is only called from | |
1155 | * the physical CPU that is running vcpu. | |
1156 | */ | |
1157 | kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); | |
1158 | } | |
16e8d74d | 1159 | |
18068523 GOC |
1160 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
1161 | { | |
9ed3c444 AK |
1162 | int version; |
1163 | int r; | |
50d0a0f9 | 1164 | struct pvclock_wall_clock wc; |
923de3cf | 1165 | struct timespec boot; |
18068523 GOC |
1166 | |
1167 | if (!wall_clock) | |
1168 | return; | |
1169 | ||
9ed3c444 AK |
1170 | r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version)); |
1171 | if (r) | |
1172 | return; | |
1173 | ||
1174 | if (version & 1) | |
1175 | ++version; /* first time write, random junk */ | |
1176 | ||
1177 | ++version; | |
18068523 | 1178 | |
1dab1345 NK |
1179 | if (kvm_write_guest(kvm, wall_clock, &version, sizeof(version))) |
1180 | return; | |
18068523 | 1181 | |
50d0a0f9 GH |
1182 | /* |
1183 | * The guest calculates current wall clock time by adding | |
34c238a1 | 1184 | * system time (updated by kvm_guest_time_update below) to the |
50d0a0f9 GH |
1185 | * wall clock specified here. guest system time equals host |
1186 | * system time for us, thus we must fill in host boot time here. | |
1187 | */ | |
923de3cf | 1188 | getboottime(&boot); |
50d0a0f9 | 1189 | |
4b648665 BR |
1190 | if (kvm->arch.kvmclock_offset) { |
1191 | struct timespec ts = ns_to_timespec(kvm->arch.kvmclock_offset); | |
1192 | boot = timespec_sub(boot, ts); | |
1193 | } | |
50d0a0f9 GH |
1194 | wc.sec = boot.tv_sec; |
1195 | wc.nsec = boot.tv_nsec; | |
1196 | wc.version = version; | |
18068523 GOC |
1197 | |
1198 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
1199 | ||
1200 | version++; | |
1201 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
1202 | } |
1203 | ||
50d0a0f9 GH |
1204 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
1205 | { | |
b51012de PB |
1206 | do_shl32_div32(dividend, divisor); |
1207 | return dividend; | |
50d0a0f9 GH |
1208 | } |
1209 | ||
3ae13faa | 1210 | static void kvm_get_time_scale(uint64_t scaled_hz, uint64_t base_hz, |
5f4e3f88 | 1211 | s8 *pshift, u32 *pmultiplier) |
50d0a0f9 | 1212 | { |
5f4e3f88 | 1213 | uint64_t scaled64; |
50d0a0f9 GH |
1214 | int32_t shift = 0; |
1215 | uint64_t tps64; | |
1216 | uint32_t tps32; | |
1217 | ||
3ae13faa PB |
1218 | tps64 = base_hz; |
1219 | scaled64 = scaled_hz; | |
50933623 | 1220 | while (tps64 > scaled64*2 || tps64 & 0xffffffff00000000ULL) { |
50d0a0f9 GH |
1221 | tps64 >>= 1; |
1222 | shift--; | |
1223 | } | |
1224 | ||
1225 | tps32 = (uint32_t)tps64; | |
50933623 JK |
1226 | while (tps32 <= scaled64 || scaled64 & 0xffffffff00000000ULL) { |
1227 | if (scaled64 & 0xffffffff00000000ULL || tps32 & 0x80000000) | |
5f4e3f88 ZA |
1228 | scaled64 >>= 1; |
1229 | else | |
1230 | tps32 <<= 1; | |
50d0a0f9 GH |
1231 | shift++; |
1232 | } | |
1233 | ||
5f4e3f88 ZA |
1234 | *pshift = shift; |
1235 | *pmultiplier = div_frac(scaled64, tps32); | |
50d0a0f9 | 1236 | |
3ae13faa PB |
1237 | pr_debug("%s: base_hz %llu => %llu, shift %d, mul %u\n", |
1238 | __func__, base_hz, scaled_hz, shift, *pmultiplier); | |
50d0a0f9 GH |
1239 | } |
1240 | ||
d828199e | 1241 | #ifdef CONFIG_X86_64 |
16e8d74d | 1242 | static atomic_t kvm_guest_has_master_clock = ATOMIC_INIT(0); |
d828199e | 1243 | #endif |
16e8d74d | 1244 | |
c8076604 | 1245 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
69b0049a | 1246 | static unsigned long max_tsc_khz; |
c8076604 | 1247 | |
cc578287 | 1248 | static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec) |
8cfdc000 | 1249 | { |
cc578287 ZA |
1250 | return pvclock_scale_delta(nsec, vcpu->arch.virtual_tsc_mult, |
1251 | vcpu->arch.virtual_tsc_shift); | |
8cfdc000 ZA |
1252 | } |
1253 | ||
cc578287 | 1254 | static u32 adjust_tsc_khz(u32 khz, s32 ppm) |
1e993611 | 1255 | { |
cc578287 ZA |
1256 | u64 v = (u64)khz * (1000000 + ppm); |
1257 | do_div(v, 1000000); | |
1258 | return v; | |
1e993611 JR |
1259 | } |
1260 | ||
381d585c HZ |
1261 | static int set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale) |
1262 | { | |
1263 | u64 ratio; | |
1264 | ||
1265 | /* Guest TSC same frequency as host TSC? */ | |
1266 | if (!scale) { | |
1267 | vcpu->arch.tsc_scaling_ratio = kvm_default_tsc_scaling_ratio; | |
1268 | return 0; | |
1269 | } | |
1270 | ||
1271 | /* TSC scaling supported? */ | |
1272 | if (!kvm_has_tsc_control) { | |
1273 | if (user_tsc_khz > tsc_khz) { | |
1274 | vcpu->arch.tsc_catchup = 1; | |
1275 | vcpu->arch.tsc_always_catchup = 1; | |
1276 | return 0; | |
1277 | } else { | |
1278 | WARN(1, "user requested TSC rate below hardware speed\n"); | |
1279 | return -1; | |
1280 | } | |
1281 | } | |
1282 | ||
1283 | /* TSC scaling required - calculate ratio */ | |
1284 | ratio = mul_u64_u32_div(1ULL << kvm_tsc_scaling_ratio_frac_bits, | |
1285 | user_tsc_khz, tsc_khz); | |
1286 | ||
1287 | if (ratio == 0 || ratio >= kvm_max_tsc_scaling_ratio) { | |
1288 | WARN_ONCE(1, "Invalid TSC scaling ratio - virtual-tsc-khz=%u\n", | |
1289 | user_tsc_khz); | |
1290 | return -1; | |
1291 | } | |
1292 | ||
1293 | vcpu->arch.tsc_scaling_ratio = ratio; | |
1294 | return 0; | |
1295 | } | |
1296 | ||
4941b8cb | 1297 | static int kvm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz) |
759379dd | 1298 | { |
cc578287 ZA |
1299 | u32 thresh_lo, thresh_hi; |
1300 | int use_scaling = 0; | |
217fc9cf | 1301 | |
03ba32ca | 1302 | /* tsc_khz can be zero if TSC calibration fails */ |
4941b8cb | 1303 | if (user_tsc_khz == 0) { |
ad721883 HZ |
1304 | /* set tsc_scaling_ratio to a safe value */ |
1305 | vcpu->arch.tsc_scaling_ratio = kvm_default_tsc_scaling_ratio; | |
381d585c | 1306 | return -1; |
ad721883 | 1307 | } |
03ba32ca | 1308 | |
c285545f | 1309 | /* Compute a scale to convert nanoseconds in TSC cycles */ |
3ae13faa | 1310 | kvm_get_time_scale(user_tsc_khz * 1000LL, NSEC_PER_SEC, |
cc578287 ZA |
1311 | &vcpu->arch.virtual_tsc_shift, |
1312 | &vcpu->arch.virtual_tsc_mult); | |
4941b8cb | 1313 | vcpu->arch.virtual_tsc_khz = user_tsc_khz; |
cc578287 ZA |
1314 | |
1315 | /* | |
1316 | * Compute the variation in TSC rate which is acceptable | |
1317 | * within the range of tolerance and decide if the | |
1318 | * rate being applied is within that bounds of the hardware | |
1319 | * rate. If so, no scaling or compensation need be done. | |
1320 | */ | |
1321 | thresh_lo = adjust_tsc_khz(tsc_khz, -tsc_tolerance_ppm); | |
1322 | thresh_hi = adjust_tsc_khz(tsc_khz, tsc_tolerance_ppm); | |
4941b8cb PB |
1323 | if (user_tsc_khz < thresh_lo || user_tsc_khz > thresh_hi) { |
1324 | pr_debug("kvm: requested TSC rate %u falls outside tolerance [%u,%u]\n", user_tsc_khz, thresh_lo, thresh_hi); | |
cc578287 ZA |
1325 | use_scaling = 1; |
1326 | } | |
4941b8cb | 1327 | return set_tsc_khz(vcpu, user_tsc_khz, use_scaling); |
c285545f ZA |
1328 | } |
1329 | ||
1330 | static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns) | |
1331 | { | |
e26101b1 | 1332 | u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.this_tsc_nsec, |
cc578287 ZA |
1333 | vcpu->arch.virtual_tsc_mult, |
1334 | vcpu->arch.virtual_tsc_shift); | |
e26101b1 | 1335 | tsc += vcpu->arch.this_tsc_write; |
c285545f ZA |
1336 | return tsc; |
1337 | } | |
1338 | ||
69b0049a | 1339 | static void kvm_track_tsc_matching(struct kvm_vcpu *vcpu) |
b48aa97e MT |
1340 | { |
1341 | #ifdef CONFIG_X86_64 | |
1342 | bool vcpus_matched; | |
b48aa97e MT |
1343 | struct kvm_arch *ka = &vcpu->kvm->arch; |
1344 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1345 | ||
1346 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1347 | atomic_read(&vcpu->kvm->online_vcpus)); | |
1348 | ||
7f187922 MT |
1349 | /* |
1350 | * Once the masterclock is enabled, always perform request in | |
1351 | * order to update it. | |
1352 | * | |
1353 | * In order to enable masterclock, the host clocksource must be TSC | |
1354 | * and the vcpus need to have matched TSCs. When that happens, | |
1355 | * perform request to enable masterclock. | |
1356 | */ | |
1357 | if (ka->use_master_clock || | |
1358 | (gtod->clock.vclock_mode == VCLOCK_TSC && vcpus_matched)) | |
b48aa97e MT |
1359 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
1360 | ||
1361 | trace_kvm_track_tsc(vcpu->vcpu_id, ka->nr_vcpus_matched_tsc, | |
1362 | atomic_read(&vcpu->kvm->online_vcpus), | |
1363 | ka->use_master_clock, gtod->clock.vclock_mode); | |
1364 | #endif | |
1365 | } | |
1366 | ||
ba904635 WA |
1367 | static void update_ia32_tsc_adjust_msr(struct kvm_vcpu *vcpu, s64 offset) |
1368 | { | |
1369 | u64 curr_offset = kvm_x86_ops->read_tsc_offset(vcpu); | |
1370 | vcpu->arch.ia32_tsc_adjust_msr += offset - curr_offset; | |
1371 | } | |
1372 | ||
35181e86 HZ |
1373 | /* |
1374 | * Multiply tsc by a fixed point number represented by ratio. | |
1375 | * | |
1376 | * The most significant 64-N bits (mult) of ratio represent the | |
1377 | * integral part of the fixed point number; the remaining N bits | |
1378 | * (frac) represent the fractional part, ie. ratio represents a fixed | |
1379 | * point number (mult + frac * 2^(-N)). | |
1380 | * | |
1381 | * N equals to kvm_tsc_scaling_ratio_frac_bits. | |
1382 | */ | |
1383 | static inline u64 __scale_tsc(u64 ratio, u64 tsc) | |
1384 | { | |
1385 | return mul_u64_u64_shr(tsc, ratio, kvm_tsc_scaling_ratio_frac_bits); | |
1386 | } | |
1387 | ||
1388 | u64 kvm_scale_tsc(struct kvm_vcpu *vcpu, u64 tsc) | |
1389 | { | |
1390 | u64 _tsc = tsc; | |
1391 | u64 ratio = vcpu->arch.tsc_scaling_ratio; | |
1392 | ||
1393 | if (ratio != kvm_default_tsc_scaling_ratio) | |
1394 | _tsc = __scale_tsc(ratio, tsc); | |
1395 | ||
1396 | return _tsc; | |
1397 | } | |
1398 | EXPORT_SYMBOL_GPL(kvm_scale_tsc); | |
1399 | ||
07c1419a HZ |
1400 | static u64 kvm_compute_tsc_offset(struct kvm_vcpu *vcpu, u64 target_tsc) |
1401 | { | |
1402 | u64 tsc; | |
1403 | ||
1404 | tsc = kvm_scale_tsc(vcpu, rdtsc()); | |
1405 | ||
1406 | return target_tsc - tsc; | |
1407 | } | |
1408 | ||
4ba76538 HZ |
1409 | u64 kvm_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc) |
1410 | { | |
1411 | return kvm_x86_ops->read_l1_tsc(vcpu, kvm_scale_tsc(vcpu, host_tsc)); | |
1412 | } | |
1413 | EXPORT_SYMBOL_GPL(kvm_read_l1_tsc); | |
1414 | ||
8fe8ab46 | 1415 | void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr) |
99e3e30a ZA |
1416 | { |
1417 | struct kvm *kvm = vcpu->kvm; | |
f38e098f | 1418 | u64 offset, ns, elapsed; |
99e3e30a | 1419 | unsigned long flags; |
02626b6a | 1420 | s64 usdiff; |
b48aa97e | 1421 | bool matched; |
0d3da0d2 | 1422 | bool already_matched; |
8fe8ab46 | 1423 | u64 data = msr->data; |
99e3e30a | 1424 | |
038f8c11 | 1425 | raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags); |
07c1419a | 1426 | offset = kvm_compute_tsc_offset(vcpu, data); |
759379dd | 1427 | ns = get_kernel_ns(); |
f38e098f | 1428 | elapsed = ns - kvm->arch.last_tsc_nsec; |
5d3cb0f6 | 1429 | |
03ba32ca | 1430 | if (vcpu->arch.virtual_tsc_khz) { |
8915aa27 MT |
1431 | int faulted = 0; |
1432 | ||
03ba32ca MT |
1433 | /* n.b - signed multiplication and division required */ |
1434 | usdiff = data - kvm->arch.last_tsc_write; | |
5d3cb0f6 | 1435 | #ifdef CONFIG_X86_64 |
03ba32ca | 1436 | usdiff = (usdiff * 1000) / vcpu->arch.virtual_tsc_khz; |
5d3cb0f6 | 1437 | #else |
03ba32ca | 1438 | /* do_div() only does unsigned */ |
8915aa27 MT |
1439 | asm("1: idivl %[divisor]\n" |
1440 | "2: xor %%edx, %%edx\n" | |
1441 | " movl $0, %[faulted]\n" | |
1442 | "3:\n" | |
1443 | ".section .fixup,\"ax\"\n" | |
1444 | "4: movl $1, %[faulted]\n" | |
1445 | " jmp 3b\n" | |
1446 | ".previous\n" | |
1447 | ||
1448 | _ASM_EXTABLE(1b, 4b) | |
1449 | ||
1450 | : "=A"(usdiff), [faulted] "=r" (faulted) | |
1451 | : "A"(usdiff * 1000), [divisor] "rm"(vcpu->arch.virtual_tsc_khz)); | |
1452 | ||
5d3cb0f6 | 1453 | #endif |
03ba32ca MT |
1454 | do_div(elapsed, 1000); |
1455 | usdiff -= elapsed; | |
1456 | if (usdiff < 0) | |
1457 | usdiff = -usdiff; | |
8915aa27 MT |
1458 | |
1459 | /* idivl overflow => difference is larger than USEC_PER_SEC */ | |
1460 | if (faulted) | |
1461 | usdiff = USEC_PER_SEC; | |
03ba32ca MT |
1462 | } else |
1463 | usdiff = USEC_PER_SEC; /* disable TSC match window below */ | |
f38e098f ZA |
1464 | |
1465 | /* | |
5d3cb0f6 ZA |
1466 | * Special case: TSC write with a small delta (1 second) of virtual |
1467 | * cycle time against real time is interpreted as an attempt to | |
1468 | * synchronize the CPU. | |
1469 | * | |
1470 | * For a reliable TSC, we can match TSC offsets, and for an unstable | |
1471 | * TSC, we add elapsed time in this computation. We could let the | |
1472 | * compensation code attempt to catch up if we fall behind, but | |
1473 | * it's better to try to match offsets from the beginning. | |
1474 | */ | |
02626b6a | 1475 | if (usdiff < USEC_PER_SEC && |
5d3cb0f6 | 1476 | vcpu->arch.virtual_tsc_khz == kvm->arch.last_tsc_khz) { |
f38e098f | 1477 | if (!check_tsc_unstable()) { |
e26101b1 | 1478 | offset = kvm->arch.cur_tsc_offset; |
f38e098f ZA |
1479 | pr_debug("kvm: matched tsc offset for %llu\n", data); |
1480 | } else { | |
857e4099 | 1481 | u64 delta = nsec_to_cycles(vcpu, elapsed); |
5d3cb0f6 | 1482 | data += delta; |
07c1419a | 1483 | offset = kvm_compute_tsc_offset(vcpu, data); |
759379dd | 1484 | pr_debug("kvm: adjusted tsc offset by %llu\n", delta); |
f38e098f | 1485 | } |
b48aa97e | 1486 | matched = true; |
0d3da0d2 | 1487 | already_matched = (vcpu->arch.this_tsc_generation == kvm->arch.cur_tsc_generation); |
e26101b1 ZA |
1488 | } else { |
1489 | /* | |
1490 | * We split periods of matched TSC writes into generations. | |
1491 | * For each generation, we track the original measured | |
1492 | * nanosecond time, offset, and write, so if TSCs are in | |
1493 | * sync, we can match exact offset, and if not, we can match | |
4a969980 | 1494 | * exact software computation in compute_guest_tsc() |
e26101b1 ZA |
1495 | * |
1496 | * These values are tracked in kvm->arch.cur_xxx variables. | |
1497 | */ | |
1498 | kvm->arch.cur_tsc_generation++; | |
1499 | kvm->arch.cur_tsc_nsec = ns; | |
1500 | kvm->arch.cur_tsc_write = data; | |
1501 | kvm->arch.cur_tsc_offset = offset; | |
b48aa97e | 1502 | matched = false; |
0d3da0d2 | 1503 | pr_debug("kvm: new tsc generation %llu, clock %llu\n", |
e26101b1 | 1504 | kvm->arch.cur_tsc_generation, data); |
f38e098f | 1505 | } |
e26101b1 ZA |
1506 | |
1507 | /* | |
1508 | * We also track th most recent recorded KHZ, write and time to | |
1509 | * allow the matching interval to be extended at each write. | |
1510 | */ | |
f38e098f ZA |
1511 | kvm->arch.last_tsc_nsec = ns; |
1512 | kvm->arch.last_tsc_write = data; | |
5d3cb0f6 | 1513 | kvm->arch.last_tsc_khz = vcpu->arch.virtual_tsc_khz; |
99e3e30a | 1514 | |
b183aa58 | 1515 | vcpu->arch.last_guest_tsc = data; |
e26101b1 ZA |
1516 | |
1517 | /* Keep track of which generation this VCPU has synchronized to */ | |
1518 | vcpu->arch.this_tsc_generation = kvm->arch.cur_tsc_generation; | |
1519 | vcpu->arch.this_tsc_nsec = kvm->arch.cur_tsc_nsec; | |
1520 | vcpu->arch.this_tsc_write = kvm->arch.cur_tsc_write; | |
1521 | ||
ba904635 WA |
1522 | if (guest_cpuid_has_tsc_adjust(vcpu) && !msr->host_initiated) |
1523 | update_ia32_tsc_adjust_msr(vcpu, offset); | |
e26101b1 ZA |
1524 | kvm_x86_ops->write_tsc_offset(vcpu, offset); |
1525 | raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags); | |
b48aa97e MT |
1526 | |
1527 | spin_lock(&kvm->arch.pvclock_gtod_sync_lock); | |
0d3da0d2 | 1528 | if (!matched) { |
b48aa97e | 1529 | kvm->arch.nr_vcpus_matched_tsc = 0; |
0d3da0d2 TG |
1530 | } else if (!already_matched) { |
1531 | kvm->arch.nr_vcpus_matched_tsc++; | |
1532 | } | |
b48aa97e MT |
1533 | |
1534 | kvm_track_tsc_matching(vcpu); | |
1535 | spin_unlock(&kvm->arch.pvclock_gtod_sync_lock); | |
99e3e30a | 1536 | } |
e26101b1 | 1537 | |
99e3e30a ZA |
1538 | EXPORT_SYMBOL_GPL(kvm_write_tsc); |
1539 | ||
58ea6767 HZ |
1540 | static inline void adjust_tsc_offset_guest(struct kvm_vcpu *vcpu, |
1541 | s64 adjustment) | |
1542 | { | |
1543 | kvm_x86_ops->adjust_tsc_offset_guest(vcpu, adjustment); | |
1544 | } | |
1545 | ||
1546 | static inline void adjust_tsc_offset_host(struct kvm_vcpu *vcpu, s64 adjustment) | |
1547 | { | |
1548 | if (vcpu->arch.tsc_scaling_ratio != kvm_default_tsc_scaling_ratio) | |
1549 | WARN_ON(adjustment < 0); | |
1550 | adjustment = kvm_scale_tsc(vcpu, (u64) adjustment); | |
1551 | kvm_x86_ops->adjust_tsc_offset_guest(vcpu, adjustment); | |
1552 | } | |
1553 | ||
d828199e MT |
1554 | #ifdef CONFIG_X86_64 |
1555 | ||
1556 | static cycle_t read_tsc(void) | |
1557 | { | |
03b9730b AL |
1558 | cycle_t ret = (cycle_t)rdtsc_ordered(); |
1559 | u64 last = pvclock_gtod_data.clock.cycle_last; | |
d828199e MT |
1560 | |
1561 | if (likely(ret >= last)) | |
1562 | return ret; | |
1563 | ||
1564 | /* | |
1565 | * GCC likes to generate cmov here, but this branch is extremely | |
6a6256f9 | 1566 | * predictable (it's just a function of time and the likely is |
d828199e MT |
1567 | * very likely) and there's a data dependence, so force GCC |
1568 | * to generate a branch instead. I don't barrier() because | |
1569 | * we don't actually need a barrier, and if this function | |
1570 | * ever gets inlined it will generate worse code. | |
1571 | */ | |
1572 | asm volatile (""); | |
1573 | return last; | |
1574 | } | |
1575 | ||
1576 | static inline u64 vgettsc(cycle_t *cycle_now) | |
1577 | { | |
1578 | long v; | |
1579 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1580 | ||
1581 | *cycle_now = read_tsc(); | |
1582 | ||
1583 | v = (*cycle_now - gtod->clock.cycle_last) & gtod->clock.mask; | |
1584 | return v * gtod->clock.mult; | |
1585 | } | |
1586 | ||
cbcf2dd3 | 1587 | static int do_monotonic_boot(s64 *t, cycle_t *cycle_now) |
d828199e | 1588 | { |
cbcf2dd3 | 1589 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; |
d828199e | 1590 | unsigned long seq; |
d828199e | 1591 | int mode; |
cbcf2dd3 | 1592 | u64 ns; |
d828199e | 1593 | |
d828199e MT |
1594 | do { |
1595 | seq = read_seqcount_begin(>od->seq); | |
1596 | mode = gtod->clock.vclock_mode; | |
cbcf2dd3 | 1597 | ns = gtod->nsec_base; |
d828199e MT |
1598 | ns += vgettsc(cycle_now); |
1599 | ns >>= gtod->clock.shift; | |
cbcf2dd3 | 1600 | ns += gtod->boot_ns; |
d828199e | 1601 | } while (unlikely(read_seqcount_retry(>od->seq, seq))); |
cbcf2dd3 | 1602 | *t = ns; |
d828199e MT |
1603 | |
1604 | return mode; | |
1605 | } | |
1606 | ||
1607 | /* returns true if host is using tsc clocksource */ | |
1608 | static bool kvm_get_time_and_clockread(s64 *kernel_ns, cycle_t *cycle_now) | |
1609 | { | |
d828199e MT |
1610 | /* checked again under seqlock below */ |
1611 | if (pvclock_gtod_data.clock.vclock_mode != VCLOCK_TSC) | |
1612 | return false; | |
1613 | ||
cbcf2dd3 | 1614 | return do_monotonic_boot(kernel_ns, cycle_now) == VCLOCK_TSC; |
d828199e MT |
1615 | } |
1616 | #endif | |
1617 | ||
1618 | /* | |
1619 | * | |
b48aa97e MT |
1620 | * Assuming a stable TSC across physical CPUS, and a stable TSC |
1621 | * across virtual CPUs, the following condition is possible. | |
1622 | * Each numbered line represents an event visible to both | |
d828199e MT |
1623 | * CPUs at the next numbered event. |
1624 | * | |
1625 | * "timespecX" represents host monotonic time. "tscX" represents | |
1626 | * RDTSC value. | |
1627 | * | |
1628 | * VCPU0 on CPU0 | VCPU1 on CPU1 | |
1629 | * | |
1630 | * 1. read timespec0,tsc0 | |
1631 | * 2. | timespec1 = timespec0 + N | |
1632 | * | tsc1 = tsc0 + M | |
1633 | * 3. transition to guest | transition to guest | |
1634 | * 4. ret0 = timespec0 + (rdtsc - tsc0) | | |
1635 | * 5. | ret1 = timespec1 + (rdtsc - tsc1) | |
1636 | * | ret1 = timespec0 + N + (rdtsc - (tsc0 + M)) | |
1637 | * | |
1638 | * Since ret0 update is visible to VCPU1 at time 5, to obey monotonicity: | |
1639 | * | |
1640 | * - ret0 < ret1 | |
1641 | * - timespec0 + (rdtsc - tsc0) < timespec0 + N + (rdtsc - (tsc0 + M)) | |
1642 | * ... | |
1643 | * - 0 < N - M => M < N | |
1644 | * | |
1645 | * That is, when timespec0 != timespec1, M < N. Unfortunately that is not | |
1646 | * always the case (the difference between two distinct xtime instances | |
1647 | * might be smaller then the difference between corresponding TSC reads, | |
1648 | * when updating guest vcpus pvclock areas). | |
1649 | * | |
1650 | * To avoid that problem, do not allow visibility of distinct | |
1651 | * system_timestamp/tsc_timestamp values simultaneously: use a master | |
1652 | * copy of host monotonic time values. Update that master copy | |
1653 | * in lockstep. | |
1654 | * | |
b48aa97e | 1655 | * Rely on synchronization of host TSCs and guest TSCs for monotonicity. |
d828199e MT |
1656 | * |
1657 | */ | |
1658 | ||
1659 | static void pvclock_update_vm_gtod_copy(struct kvm *kvm) | |
1660 | { | |
1661 | #ifdef CONFIG_X86_64 | |
1662 | struct kvm_arch *ka = &kvm->arch; | |
1663 | int vclock_mode; | |
b48aa97e MT |
1664 | bool host_tsc_clocksource, vcpus_matched; |
1665 | ||
1666 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1667 | atomic_read(&kvm->online_vcpus)); | |
d828199e MT |
1668 | |
1669 | /* | |
1670 | * If the host uses TSC clock, then passthrough TSC as stable | |
1671 | * to the guest. | |
1672 | */ | |
b48aa97e | 1673 | host_tsc_clocksource = kvm_get_time_and_clockread( |
d828199e MT |
1674 | &ka->master_kernel_ns, |
1675 | &ka->master_cycle_now); | |
1676 | ||
16a96021 | 1677 | ka->use_master_clock = host_tsc_clocksource && vcpus_matched |
54750f2c MT |
1678 | && !backwards_tsc_observed |
1679 | && !ka->boot_vcpu_runs_old_kvmclock; | |
b48aa97e | 1680 | |
d828199e MT |
1681 | if (ka->use_master_clock) |
1682 | atomic_set(&kvm_guest_has_master_clock, 1); | |
1683 | ||
1684 | vclock_mode = pvclock_gtod_data.clock.vclock_mode; | |
b48aa97e MT |
1685 | trace_kvm_update_master_clock(ka->use_master_clock, vclock_mode, |
1686 | vcpus_matched); | |
d828199e MT |
1687 | #endif |
1688 | } | |
1689 | ||
2860c4b1 PB |
1690 | void kvm_make_mclock_inprogress_request(struct kvm *kvm) |
1691 | { | |
1692 | kvm_make_all_cpus_request(kvm, KVM_REQ_MCLOCK_INPROGRESS); | |
1693 | } | |
1694 | ||
2e762ff7 MT |
1695 | static void kvm_gen_update_masterclock(struct kvm *kvm) |
1696 | { | |
1697 | #ifdef CONFIG_X86_64 | |
1698 | int i; | |
1699 | struct kvm_vcpu *vcpu; | |
1700 | struct kvm_arch *ka = &kvm->arch; | |
1701 | ||
1702 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
1703 | kvm_make_mclock_inprogress_request(kvm); | |
1704 | /* no guest entries from this point */ | |
1705 | pvclock_update_vm_gtod_copy(kvm); | |
1706 | ||
1707 | kvm_for_each_vcpu(i, vcpu, kvm) | |
105b21bb | 1708 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
2e762ff7 MT |
1709 | |
1710 | /* guest entries allowed */ | |
1711 | kvm_for_each_vcpu(i, vcpu, kvm) | |
1712 | clear_bit(KVM_REQ_MCLOCK_INPROGRESS, &vcpu->requests); | |
1713 | ||
1714 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
1715 | #endif | |
1716 | } | |
1717 | ||
34c238a1 | 1718 | static int kvm_guest_time_update(struct kvm_vcpu *v) |
18068523 | 1719 | { |
78db6a50 | 1720 | unsigned long flags, tgt_tsc_khz; |
18068523 | 1721 | struct kvm_vcpu_arch *vcpu = &v->arch; |
d828199e | 1722 | struct kvm_arch *ka = &v->kvm->arch; |
f25e656d | 1723 | s64 kernel_ns; |
d828199e | 1724 | u64 tsc_timestamp, host_tsc; |
0b79459b | 1725 | struct pvclock_vcpu_time_info guest_hv_clock; |
51d59c6b | 1726 | u8 pvclock_flags; |
d828199e MT |
1727 | bool use_master_clock; |
1728 | ||
1729 | kernel_ns = 0; | |
1730 | host_tsc = 0; | |
18068523 | 1731 | |
d828199e MT |
1732 | /* |
1733 | * If the host uses TSC clock, then passthrough TSC as stable | |
1734 | * to the guest. | |
1735 | */ | |
1736 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
1737 | use_master_clock = ka->use_master_clock; | |
1738 | if (use_master_clock) { | |
1739 | host_tsc = ka->master_cycle_now; | |
1740 | kernel_ns = ka->master_kernel_ns; | |
1741 | } | |
1742 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
c09664bb MT |
1743 | |
1744 | /* Keep irq disabled to prevent changes to the clock */ | |
1745 | local_irq_save(flags); | |
78db6a50 PB |
1746 | tgt_tsc_khz = __this_cpu_read(cpu_tsc_khz); |
1747 | if (unlikely(tgt_tsc_khz == 0)) { | |
c09664bb MT |
1748 | local_irq_restore(flags); |
1749 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); | |
1750 | return 1; | |
1751 | } | |
d828199e | 1752 | if (!use_master_clock) { |
4ea1636b | 1753 | host_tsc = rdtsc(); |
d828199e MT |
1754 | kernel_ns = get_kernel_ns(); |
1755 | } | |
1756 | ||
4ba76538 | 1757 | tsc_timestamp = kvm_read_l1_tsc(v, host_tsc); |
d828199e | 1758 | |
c285545f ZA |
1759 | /* |
1760 | * We may have to catch up the TSC to match elapsed wall clock | |
1761 | * time for two reasons, even if kvmclock is used. | |
1762 | * 1) CPU could have been running below the maximum TSC rate | |
1763 | * 2) Broken TSC compensation resets the base at each VCPU | |
1764 | * entry to avoid unknown leaps of TSC even when running | |
1765 | * again on the same CPU. This may cause apparent elapsed | |
1766 | * time to disappear, and the guest to stand still or run | |
1767 | * very slowly. | |
1768 | */ | |
1769 | if (vcpu->tsc_catchup) { | |
1770 | u64 tsc = compute_guest_tsc(v, kernel_ns); | |
1771 | if (tsc > tsc_timestamp) { | |
f1e2b260 | 1772 | adjust_tsc_offset_guest(v, tsc - tsc_timestamp); |
c285545f ZA |
1773 | tsc_timestamp = tsc; |
1774 | } | |
50d0a0f9 GH |
1775 | } |
1776 | ||
18068523 GOC |
1777 | local_irq_restore(flags); |
1778 | ||
0b79459b | 1779 | if (!vcpu->pv_time_enabled) |
c285545f | 1780 | return 0; |
18068523 | 1781 | |
78db6a50 PB |
1782 | if (kvm_has_tsc_control) |
1783 | tgt_tsc_khz = kvm_scale_tsc(v, tgt_tsc_khz); | |
1784 | ||
1785 | if (unlikely(vcpu->hw_tsc_khz != tgt_tsc_khz)) { | |
3ae13faa | 1786 | kvm_get_time_scale(NSEC_PER_SEC, tgt_tsc_khz * 1000LL, |
5f4e3f88 ZA |
1787 | &vcpu->hv_clock.tsc_shift, |
1788 | &vcpu->hv_clock.tsc_to_system_mul); | |
78db6a50 | 1789 | vcpu->hw_tsc_khz = tgt_tsc_khz; |
8cfdc000 ZA |
1790 | } |
1791 | ||
1792 | /* With all the info we got, fill in the values */ | |
1d5f066e | 1793 | vcpu->hv_clock.tsc_timestamp = tsc_timestamp; |
759379dd | 1794 | vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset; |
28e4639a | 1795 | vcpu->last_guest_tsc = tsc_timestamp; |
51d59c6b | 1796 | |
09a0c3f1 OH |
1797 | if (unlikely(kvm_read_guest_cached(v->kvm, &vcpu->pv_time, |
1798 | &guest_hv_clock, sizeof(guest_hv_clock)))) | |
1799 | return 0; | |
1800 | ||
5dca0d91 RK |
1801 | /* This VCPU is paused, but it's legal for a guest to read another |
1802 | * VCPU's kvmclock, so we really have to follow the specification where | |
1803 | * it says that version is odd if data is being modified, and even after | |
1804 | * it is consistent. | |
1805 | * | |
1806 | * Version field updates must be kept separate. This is because | |
1807 | * kvm_write_guest_cached might use a "rep movs" instruction, and | |
1808 | * writes within a string instruction are weakly ordered. So there | |
1809 | * are three writes overall. | |
1810 | * | |
1811 | * As a small optimization, only write the version field in the first | |
1812 | * and third write. The vcpu->pv_time cache is still valid, because the | |
1813 | * version field is the first in the struct. | |
18068523 | 1814 | */ |
5dca0d91 RK |
1815 | BUILD_BUG_ON(offsetof(struct pvclock_vcpu_time_info, version) != 0); |
1816 | ||
1817 | vcpu->hv_clock.version = guest_hv_clock.version + 1; | |
1818 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, | |
1819 | &vcpu->hv_clock, | |
1820 | sizeof(vcpu->hv_clock.version)); | |
1821 | ||
1822 | smp_wmb(); | |
78c0337a MT |
1823 | |
1824 | /* retain PVCLOCK_GUEST_STOPPED if set in guest copy */ | |
0b79459b | 1825 | pvclock_flags = (guest_hv_clock.flags & PVCLOCK_GUEST_STOPPED); |
78c0337a MT |
1826 | |
1827 | if (vcpu->pvclock_set_guest_stopped_request) { | |
1828 | pvclock_flags |= PVCLOCK_GUEST_STOPPED; | |
1829 | vcpu->pvclock_set_guest_stopped_request = false; | |
1830 | } | |
1831 | ||
d828199e MT |
1832 | /* If the host uses TSC clocksource, then it is stable */ |
1833 | if (use_master_clock) | |
1834 | pvclock_flags |= PVCLOCK_TSC_STABLE_BIT; | |
1835 | ||
78c0337a MT |
1836 | vcpu->hv_clock.flags = pvclock_flags; |
1837 | ||
ce1a5e60 DM |
1838 | trace_kvm_pvclock_update(v->vcpu_id, &vcpu->hv_clock); |
1839 | ||
0b79459b AH |
1840 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
1841 | &vcpu->hv_clock, | |
1842 | sizeof(vcpu->hv_clock)); | |
5dca0d91 RK |
1843 | |
1844 | smp_wmb(); | |
1845 | ||
1846 | vcpu->hv_clock.version++; | |
1847 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, | |
1848 | &vcpu->hv_clock, | |
1849 | sizeof(vcpu->hv_clock.version)); | |
8cfdc000 | 1850 | return 0; |
c8076604 GH |
1851 | } |
1852 | ||
0061d53d MT |
1853 | /* |
1854 | * kvmclock updates which are isolated to a given vcpu, such as | |
1855 | * vcpu->cpu migration, should not allow system_timestamp from | |
1856 | * the rest of the vcpus to remain static. Otherwise ntp frequency | |
1857 | * correction applies to one vcpu's system_timestamp but not | |
1858 | * the others. | |
1859 | * | |
1860 | * So in those cases, request a kvmclock update for all vcpus. | |
7e44e449 AJ |
1861 | * We need to rate-limit these requests though, as they can |
1862 | * considerably slow guests that have a large number of vcpus. | |
1863 | * The time for a remote vcpu to update its kvmclock is bound | |
1864 | * by the delay we use to rate-limit the updates. | |
0061d53d MT |
1865 | */ |
1866 | ||
7e44e449 AJ |
1867 | #define KVMCLOCK_UPDATE_DELAY msecs_to_jiffies(100) |
1868 | ||
1869 | static void kvmclock_update_fn(struct work_struct *work) | |
0061d53d MT |
1870 | { |
1871 | int i; | |
7e44e449 AJ |
1872 | struct delayed_work *dwork = to_delayed_work(work); |
1873 | struct kvm_arch *ka = container_of(dwork, struct kvm_arch, | |
1874 | kvmclock_update_work); | |
1875 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
0061d53d MT |
1876 | struct kvm_vcpu *vcpu; |
1877 | ||
1878 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
105b21bb | 1879 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0061d53d MT |
1880 | kvm_vcpu_kick(vcpu); |
1881 | } | |
1882 | } | |
1883 | ||
7e44e449 AJ |
1884 | static void kvm_gen_kvmclock_update(struct kvm_vcpu *v) |
1885 | { | |
1886 | struct kvm *kvm = v->kvm; | |
1887 | ||
105b21bb | 1888 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); |
7e44e449 AJ |
1889 | schedule_delayed_work(&kvm->arch.kvmclock_update_work, |
1890 | KVMCLOCK_UPDATE_DELAY); | |
1891 | } | |
1892 | ||
332967a3 AJ |
1893 | #define KVMCLOCK_SYNC_PERIOD (300 * HZ) |
1894 | ||
1895 | static void kvmclock_sync_fn(struct work_struct *work) | |
1896 | { | |
1897 | struct delayed_work *dwork = to_delayed_work(work); | |
1898 | struct kvm_arch *ka = container_of(dwork, struct kvm_arch, | |
1899 | kvmclock_sync_work); | |
1900 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
1901 | ||
630994b3 MT |
1902 | if (!kvmclock_periodic_sync) |
1903 | return; | |
1904 | ||
332967a3 AJ |
1905 | schedule_delayed_work(&kvm->arch.kvmclock_update_work, 0); |
1906 | schedule_delayed_work(&kvm->arch.kvmclock_sync_work, | |
1907 | KVMCLOCK_SYNC_PERIOD); | |
1908 | } | |
1909 | ||
890ca9ae | 1910 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
15c4a640 | 1911 | { |
890ca9ae HY |
1912 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1913 | unsigned bank_num = mcg_cap & 0xff; | |
1914 | ||
15c4a640 | 1915 | switch (msr) { |
15c4a640 | 1916 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 1917 | vcpu->arch.mcg_status = data; |
15c4a640 | 1918 | break; |
c7ac679c | 1919 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1920 | if (!(mcg_cap & MCG_CTL_P)) |
1921 | return 1; | |
1922 | if (data != 0 && data != ~(u64)0) | |
1923 | return -1; | |
1924 | vcpu->arch.mcg_ctl = data; | |
1925 | break; | |
1926 | default: | |
1927 | if (msr >= MSR_IA32_MC0_CTL && | |
81760dcc | 1928 | msr < MSR_IA32_MCx_CTL(bank_num)) { |
890ca9ae | 1929 | u32 offset = msr - MSR_IA32_MC0_CTL; |
114be429 AP |
1930 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
1931 | * some Linux kernels though clear bit 10 in bank 4 to | |
1932 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore | |
1933 | * this to avoid an uncatched #GP in the guest | |
1934 | */ | |
890ca9ae | 1935 | if ((offset & 0x3) == 0 && |
114be429 | 1936 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
890ca9ae HY |
1937 | return -1; |
1938 | vcpu->arch.mce_banks[offset] = data; | |
1939 | break; | |
1940 | } | |
1941 | return 1; | |
1942 | } | |
1943 | return 0; | |
1944 | } | |
1945 | ||
ffde22ac ES |
1946 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
1947 | { | |
1948 | struct kvm *kvm = vcpu->kvm; | |
1949 | int lm = is_long_mode(vcpu); | |
1950 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
1951 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
1952 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
1953 | : kvm->arch.xen_hvm_config.blob_size_32; | |
1954 | u32 page_num = data & ~PAGE_MASK; | |
1955 | u64 page_addr = data & PAGE_MASK; | |
1956 | u8 *page; | |
1957 | int r; | |
1958 | ||
1959 | r = -E2BIG; | |
1960 | if (page_num >= blob_size) | |
1961 | goto out; | |
1962 | r = -ENOMEM; | |
ff5c2c03 SL |
1963 | page = memdup_user(blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE); |
1964 | if (IS_ERR(page)) { | |
1965 | r = PTR_ERR(page); | |
ffde22ac | 1966 | goto out; |
ff5c2c03 | 1967 | } |
54bf36aa | 1968 | if (kvm_vcpu_write_guest(vcpu, page_addr, page, PAGE_SIZE)) |
ffde22ac ES |
1969 | goto out_free; |
1970 | r = 0; | |
1971 | out_free: | |
1972 | kfree(page); | |
1973 | out: | |
1974 | return r; | |
1975 | } | |
1976 | ||
344d9588 GN |
1977 | static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data) |
1978 | { | |
1979 | gpa_t gpa = data & ~0x3f; | |
1980 | ||
4a969980 | 1981 | /* Bits 2:5 are reserved, Should be zero */ |
6adba527 | 1982 | if (data & 0x3c) |
344d9588 GN |
1983 | return 1; |
1984 | ||
1985 | vcpu->arch.apf.msr_val = data; | |
1986 | ||
1987 | if (!(data & KVM_ASYNC_PF_ENABLED)) { | |
1988 | kvm_clear_async_pf_completion_queue(vcpu); | |
1989 | kvm_async_pf_hash_reset(vcpu); | |
1990 | return 0; | |
1991 | } | |
1992 | ||
8f964525 AH |
1993 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.apf.data, gpa, |
1994 | sizeof(u32))) | |
344d9588 GN |
1995 | return 1; |
1996 | ||
6adba527 | 1997 | vcpu->arch.apf.send_user_only = !(data & KVM_ASYNC_PF_SEND_ALWAYS); |
344d9588 GN |
1998 | kvm_async_pf_wakeup_all(vcpu); |
1999 | return 0; | |
2000 | } | |
2001 | ||
12f9a48f GC |
2002 | static void kvmclock_reset(struct kvm_vcpu *vcpu) |
2003 | { | |
0b79459b | 2004 | vcpu->arch.pv_time_enabled = false; |
12f9a48f GC |
2005 | } |
2006 | ||
c9aaa895 GC |
2007 | static void record_steal_time(struct kvm_vcpu *vcpu) |
2008 | { | |
2009 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
2010 | return; | |
2011 | ||
2012 | if (unlikely(kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, | |
2013 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)))) | |
2014 | return; | |
2015 | ||
35f3fae1 WL |
2016 | if (vcpu->arch.st.steal.version & 1) |
2017 | vcpu->arch.st.steal.version += 1; /* first time write, random junk */ | |
2018 | ||
2019 | vcpu->arch.st.steal.version += 1; | |
2020 | ||
2021 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, | |
2022 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); | |
2023 | ||
2024 | smp_wmb(); | |
2025 | ||
c54cdf14 LC |
2026 | vcpu->arch.st.steal.steal += current->sched_info.run_delay - |
2027 | vcpu->arch.st.last_steal; | |
2028 | vcpu->arch.st.last_steal = current->sched_info.run_delay; | |
35f3fae1 WL |
2029 | |
2030 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, | |
2031 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); | |
2032 | ||
2033 | smp_wmb(); | |
2034 | ||
2035 | vcpu->arch.st.steal.version += 1; | |
c9aaa895 GC |
2036 | |
2037 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, | |
2038 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); | |
2039 | } | |
2040 | ||
8fe8ab46 | 2041 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
15c4a640 | 2042 | { |
5753785f | 2043 | bool pr = false; |
8fe8ab46 WA |
2044 | u32 msr = msr_info->index; |
2045 | u64 data = msr_info->data; | |
5753785f | 2046 | |
15c4a640 | 2047 | switch (msr) { |
2e32b719 BP |
2048 | case MSR_AMD64_NB_CFG: |
2049 | case MSR_IA32_UCODE_REV: | |
2050 | case MSR_IA32_UCODE_WRITE: | |
2051 | case MSR_VM_HSAVE_PA: | |
2052 | case MSR_AMD64_PATCH_LOADER: | |
2053 | case MSR_AMD64_BU_CFG2: | |
2054 | break; | |
2055 | ||
15c4a640 | 2056 | case MSR_EFER: |
b69e8cae | 2057 | return set_efer(vcpu, data); |
8f1589d9 AP |
2058 | case MSR_K7_HWCR: |
2059 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
82494028 | 2060 | data &= ~(u64)0x100; /* ignore ignne emulation enable */ |
a223c313 | 2061 | data &= ~(u64)0x8; /* ignore TLB cache disable */ |
22d48b2d | 2062 | data &= ~(u64)0x40000; /* ignore Mc status write enable */ |
8f1589d9 | 2063 | if (data != 0) { |
a737f256 CD |
2064 | vcpu_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", |
2065 | data); | |
8f1589d9 AP |
2066 | return 1; |
2067 | } | |
15c4a640 | 2068 | break; |
f7c6d140 AP |
2069 | case MSR_FAM10H_MMIO_CONF_BASE: |
2070 | if (data != 0) { | |
a737f256 CD |
2071 | vcpu_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " |
2072 | "0x%llx\n", data); | |
f7c6d140 AP |
2073 | return 1; |
2074 | } | |
15c4a640 | 2075 | break; |
b5e2fec0 AG |
2076 | case MSR_IA32_DEBUGCTLMSR: |
2077 | if (!data) { | |
2078 | /* We support the non-activated case already */ | |
2079 | break; | |
2080 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
2081 | /* Values other than LBR and BTF are vendor-specific, | |
2082 | thus reserved and should throw a #GP */ | |
2083 | return 1; | |
2084 | } | |
a737f256 CD |
2085 | vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", |
2086 | __func__, data); | |
b5e2fec0 | 2087 | break; |
9ba075a6 | 2088 | case 0x200 ... 0x2ff: |
ff53604b | 2089 | return kvm_mtrr_set_msr(vcpu, msr, data); |
15c4a640 | 2090 | case MSR_IA32_APICBASE: |
58cb628d | 2091 | return kvm_set_apic_base(vcpu, msr_info); |
0105d1a5 GN |
2092 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
2093 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
a3e06bbe LJ |
2094 | case MSR_IA32_TSCDEADLINE: |
2095 | kvm_set_lapic_tscdeadline_msr(vcpu, data); | |
2096 | break; | |
ba904635 WA |
2097 | case MSR_IA32_TSC_ADJUST: |
2098 | if (guest_cpuid_has_tsc_adjust(vcpu)) { | |
2099 | if (!msr_info->host_initiated) { | |
d913b904 | 2100 | s64 adj = data - vcpu->arch.ia32_tsc_adjust_msr; |
d7add054 | 2101 | adjust_tsc_offset_guest(vcpu, adj); |
ba904635 WA |
2102 | } |
2103 | vcpu->arch.ia32_tsc_adjust_msr = data; | |
2104 | } | |
2105 | break; | |
15c4a640 | 2106 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 2107 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 2108 | break; |
64d60670 PB |
2109 | case MSR_IA32_SMBASE: |
2110 | if (!msr_info->host_initiated) | |
2111 | return 1; | |
2112 | vcpu->arch.smbase = data; | |
2113 | break; | |
11c6bffa | 2114 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
2115 | case MSR_KVM_WALL_CLOCK: |
2116 | vcpu->kvm->arch.wall_clock = data; | |
2117 | kvm_write_wall_clock(vcpu->kvm, data); | |
2118 | break; | |
11c6bffa | 2119 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 | 2120 | case MSR_KVM_SYSTEM_TIME: { |
0b79459b | 2121 | u64 gpa_offset; |
54750f2c MT |
2122 | struct kvm_arch *ka = &vcpu->kvm->arch; |
2123 | ||
12f9a48f | 2124 | kvmclock_reset(vcpu); |
18068523 | 2125 | |
54750f2c MT |
2126 | if (vcpu->vcpu_id == 0 && !msr_info->host_initiated) { |
2127 | bool tmp = (msr == MSR_KVM_SYSTEM_TIME); | |
2128 | ||
2129 | if (ka->boot_vcpu_runs_old_kvmclock != tmp) | |
2130 | set_bit(KVM_REQ_MASTERCLOCK_UPDATE, | |
2131 | &vcpu->requests); | |
2132 | ||
2133 | ka->boot_vcpu_runs_old_kvmclock = tmp; | |
2134 | } | |
2135 | ||
18068523 | 2136 | vcpu->arch.time = data; |
0061d53d | 2137 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
18068523 GOC |
2138 | |
2139 | /* we verify if the enable bit is set... */ | |
2140 | if (!(data & 1)) | |
2141 | break; | |
2142 | ||
0b79459b | 2143 | gpa_offset = data & ~(PAGE_MASK | 1); |
18068523 | 2144 | |
0b79459b | 2145 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, |
8f964525 AH |
2146 | &vcpu->arch.pv_time, data & ~1ULL, |
2147 | sizeof(struct pvclock_vcpu_time_info))) | |
0b79459b AH |
2148 | vcpu->arch.pv_time_enabled = false; |
2149 | else | |
2150 | vcpu->arch.pv_time_enabled = true; | |
32cad84f | 2151 | |
18068523 GOC |
2152 | break; |
2153 | } | |
344d9588 GN |
2154 | case MSR_KVM_ASYNC_PF_EN: |
2155 | if (kvm_pv_enable_async_pf(vcpu, data)) | |
2156 | return 1; | |
2157 | break; | |
c9aaa895 GC |
2158 | case MSR_KVM_STEAL_TIME: |
2159 | ||
2160 | if (unlikely(!sched_info_on())) | |
2161 | return 1; | |
2162 | ||
2163 | if (data & KVM_STEAL_RESERVED_MASK) | |
2164 | return 1; | |
2165 | ||
2166 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.st.stime, | |
8f964525 AH |
2167 | data & KVM_STEAL_VALID_BITS, |
2168 | sizeof(struct kvm_steal_time))) | |
c9aaa895 GC |
2169 | return 1; |
2170 | ||
2171 | vcpu->arch.st.msr_val = data; | |
2172 | ||
2173 | if (!(data & KVM_MSR_ENABLED)) | |
2174 | break; | |
2175 | ||
c9aaa895 GC |
2176 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); |
2177 | ||
2178 | break; | |
ae7a2a3f MT |
2179 | case MSR_KVM_PV_EOI_EN: |
2180 | if (kvm_lapic_enable_pv_eoi(vcpu, data)) | |
2181 | return 1; | |
2182 | break; | |
c9aaa895 | 2183 | |
890ca9ae HY |
2184 | case MSR_IA32_MCG_CTL: |
2185 | case MSR_IA32_MCG_STATUS: | |
81760dcc | 2186 | case MSR_IA32_MC0_CTL ... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS) - 1: |
890ca9ae | 2187 | return set_msr_mce(vcpu, msr, data); |
71db6023 | 2188 | |
6912ac32 WH |
2189 | case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3: |
2190 | case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1: | |
2191 | pr = true; /* fall through */ | |
2192 | case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3: | |
2193 | case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1: | |
c6702c9d | 2194 | if (kvm_pmu_is_valid_msr(vcpu, msr)) |
afd80d85 | 2195 | return kvm_pmu_set_msr(vcpu, msr_info); |
5753785f GN |
2196 | |
2197 | if (pr || data != 0) | |
a737f256 CD |
2198 | vcpu_unimpl(vcpu, "disabled perfctr wrmsr: " |
2199 | "0x%x data 0x%llx\n", msr, data); | |
5753785f | 2200 | break; |
84e0cefa JS |
2201 | case MSR_K7_CLK_CTL: |
2202 | /* | |
2203 | * Ignore all writes to this no longer documented MSR. | |
2204 | * Writes are only relevant for old K7 processors, | |
2205 | * all pre-dating SVM, but a recommended workaround from | |
4a969980 | 2206 | * AMD for these chips. It is possible to specify the |
84e0cefa JS |
2207 | * affected processor models on the command line, hence |
2208 | * the need to ignore the workaround. | |
2209 | */ | |
2210 | break; | |
55cd8e5a | 2211 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
e7d9513b AS |
2212 | case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: |
2213 | case HV_X64_MSR_CRASH_CTL: | |
1f4b34f8 | 2214 | case HV_X64_MSR_STIMER0_CONFIG ... HV_X64_MSR_STIMER3_COUNT: |
e7d9513b AS |
2215 | return kvm_hv_set_msr_common(vcpu, msr, data, |
2216 | msr_info->host_initiated); | |
91c9c3ed | 2217 | case MSR_IA32_BBL_CR_CTL3: |
2218 | /* Drop writes to this legacy MSR -- see rdmsr | |
2219 | * counterpart for further detail. | |
2220 | */ | |
a737f256 | 2221 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", msr, data); |
91c9c3ed | 2222 | break; |
2b036c6b BO |
2223 | case MSR_AMD64_OSVW_ID_LENGTH: |
2224 | if (!guest_cpuid_has_osvw(vcpu)) | |
2225 | return 1; | |
2226 | vcpu->arch.osvw.length = data; | |
2227 | break; | |
2228 | case MSR_AMD64_OSVW_STATUS: | |
2229 | if (!guest_cpuid_has_osvw(vcpu)) | |
2230 | return 1; | |
2231 | vcpu->arch.osvw.status = data; | |
2232 | break; | |
15c4a640 | 2233 | default: |
ffde22ac ES |
2234 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
2235 | return xen_hvm_config(vcpu, data); | |
c6702c9d | 2236 | if (kvm_pmu_is_valid_msr(vcpu, msr)) |
afd80d85 | 2237 | return kvm_pmu_set_msr(vcpu, msr_info); |
ed85c068 | 2238 | if (!ignore_msrs) { |
a737f256 CD |
2239 | vcpu_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", |
2240 | msr, data); | |
ed85c068 AP |
2241 | return 1; |
2242 | } else { | |
a737f256 CD |
2243 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", |
2244 | msr, data); | |
ed85c068 AP |
2245 | break; |
2246 | } | |
15c4a640 CO |
2247 | } |
2248 | return 0; | |
2249 | } | |
2250 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
2251 | ||
2252 | ||
2253 | /* | |
2254 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
2255 | * Returns 0 on success, non-0 otherwise. | |
2256 | * Assumes vcpu_load() was already called. | |
2257 | */ | |
609e36d3 | 2258 | int kvm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
15c4a640 | 2259 | { |
609e36d3 | 2260 | return kvm_x86_ops->get_msr(vcpu, msr); |
15c4a640 | 2261 | } |
ff651cb6 | 2262 | EXPORT_SYMBOL_GPL(kvm_get_msr); |
15c4a640 | 2263 | |
890ca9ae | 2264 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
2265 | { |
2266 | u64 data; | |
890ca9ae HY |
2267 | u64 mcg_cap = vcpu->arch.mcg_cap; |
2268 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
2269 | |
2270 | switch (msr) { | |
15c4a640 CO |
2271 | case MSR_IA32_P5_MC_ADDR: |
2272 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
2273 | data = 0; |
2274 | break; | |
15c4a640 | 2275 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
2276 | data = vcpu->arch.mcg_cap; |
2277 | break; | |
c7ac679c | 2278 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
2279 | if (!(mcg_cap & MCG_CTL_P)) |
2280 | return 1; | |
2281 | data = vcpu->arch.mcg_ctl; | |
2282 | break; | |
2283 | case MSR_IA32_MCG_STATUS: | |
2284 | data = vcpu->arch.mcg_status; | |
2285 | break; | |
2286 | default: | |
2287 | if (msr >= MSR_IA32_MC0_CTL && | |
81760dcc | 2288 | msr < MSR_IA32_MCx_CTL(bank_num)) { |
890ca9ae HY |
2289 | u32 offset = msr - MSR_IA32_MC0_CTL; |
2290 | data = vcpu->arch.mce_banks[offset]; | |
2291 | break; | |
2292 | } | |
2293 | return 1; | |
2294 | } | |
2295 | *pdata = data; | |
2296 | return 0; | |
2297 | } | |
2298 | ||
609e36d3 | 2299 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
890ca9ae | 2300 | { |
609e36d3 | 2301 | switch (msr_info->index) { |
890ca9ae | 2302 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 2303 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
2304 | case MSR_IA32_DEBUGCTLMSR: |
2305 | case MSR_IA32_LASTBRANCHFROMIP: | |
2306 | case MSR_IA32_LASTBRANCHTOIP: | |
2307 | case MSR_IA32_LASTINTFROMIP: | |
2308 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd | 2309 | case MSR_K8_SYSCFG: |
3afb1121 PB |
2310 | case MSR_K8_TSEG_ADDR: |
2311 | case MSR_K8_TSEG_MASK: | |
60af2ecd | 2312 | case MSR_K7_HWCR: |
61a6bd67 | 2313 | case MSR_VM_HSAVE_PA: |
1fdbd48c | 2314 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 2315 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 2316 | case MSR_FAM10H_MMIO_CONF_BASE: |
2e32b719 | 2317 | case MSR_AMD64_BU_CFG2: |
0c2df2a1 | 2318 | case MSR_IA32_PERF_CTL: |
609e36d3 | 2319 | msr_info->data = 0; |
15c4a640 | 2320 | break; |
6912ac32 WH |
2321 | case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3: |
2322 | case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3: | |
2323 | case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1: | |
2324 | case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1: | |
c6702c9d | 2325 | if (kvm_pmu_is_valid_msr(vcpu, msr_info->index)) |
609e36d3 PB |
2326 | return kvm_pmu_get_msr(vcpu, msr_info->index, &msr_info->data); |
2327 | msr_info->data = 0; | |
5753785f | 2328 | break; |
742bc670 | 2329 | case MSR_IA32_UCODE_REV: |
609e36d3 | 2330 | msr_info->data = 0x100000000ULL; |
742bc670 | 2331 | break; |
9ba075a6 | 2332 | case MSR_MTRRcap: |
9ba075a6 | 2333 | case 0x200 ... 0x2ff: |
ff53604b | 2334 | return kvm_mtrr_get_msr(vcpu, msr_info->index, &msr_info->data); |
15c4a640 | 2335 | case 0xcd: /* fsb frequency */ |
609e36d3 | 2336 | msr_info->data = 3; |
15c4a640 | 2337 | break; |
7b914098 JS |
2338 | /* |
2339 | * MSR_EBC_FREQUENCY_ID | |
2340 | * Conservative value valid for even the basic CPU models. | |
2341 | * Models 0,1: 000 in bits 23:21 indicating a bus speed of | |
2342 | * 100MHz, model 2 000 in bits 18:16 indicating 100MHz, | |
2343 | * and 266MHz for model 3, or 4. Set Core Clock | |
2344 | * Frequency to System Bus Frequency Ratio to 1 (bits | |
2345 | * 31:24) even though these are only valid for CPU | |
2346 | * models > 2, however guests may end up dividing or | |
2347 | * multiplying by zero otherwise. | |
2348 | */ | |
2349 | case MSR_EBC_FREQUENCY_ID: | |
609e36d3 | 2350 | msr_info->data = 1 << 24; |
7b914098 | 2351 | break; |
15c4a640 | 2352 | case MSR_IA32_APICBASE: |
609e36d3 | 2353 | msr_info->data = kvm_get_apic_base(vcpu); |
15c4a640 | 2354 | break; |
0105d1a5 | 2355 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
609e36d3 | 2356 | return kvm_x2apic_msr_read(vcpu, msr_info->index, &msr_info->data); |
0105d1a5 | 2357 | break; |
a3e06bbe | 2358 | case MSR_IA32_TSCDEADLINE: |
609e36d3 | 2359 | msr_info->data = kvm_get_lapic_tscdeadline_msr(vcpu); |
a3e06bbe | 2360 | break; |
ba904635 | 2361 | case MSR_IA32_TSC_ADJUST: |
609e36d3 | 2362 | msr_info->data = (u64)vcpu->arch.ia32_tsc_adjust_msr; |
ba904635 | 2363 | break; |
15c4a640 | 2364 | case MSR_IA32_MISC_ENABLE: |
609e36d3 | 2365 | msr_info->data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 2366 | break; |
64d60670 PB |
2367 | case MSR_IA32_SMBASE: |
2368 | if (!msr_info->host_initiated) | |
2369 | return 1; | |
2370 | msr_info->data = vcpu->arch.smbase; | |
15c4a640 | 2371 | break; |
847f0ad8 AG |
2372 | case MSR_IA32_PERF_STATUS: |
2373 | /* TSC increment by tick */ | |
609e36d3 | 2374 | msr_info->data = 1000ULL; |
847f0ad8 | 2375 | /* CPU multiplier */ |
b0996ae4 | 2376 | msr_info->data |= (((uint64_t)4ULL) << 40); |
847f0ad8 | 2377 | break; |
15c4a640 | 2378 | case MSR_EFER: |
609e36d3 | 2379 | msr_info->data = vcpu->arch.efer; |
15c4a640 | 2380 | break; |
18068523 | 2381 | case MSR_KVM_WALL_CLOCK: |
11c6bffa | 2382 | case MSR_KVM_WALL_CLOCK_NEW: |
609e36d3 | 2383 | msr_info->data = vcpu->kvm->arch.wall_clock; |
18068523 GOC |
2384 | break; |
2385 | case MSR_KVM_SYSTEM_TIME: | |
11c6bffa | 2386 | case MSR_KVM_SYSTEM_TIME_NEW: |
609e36d3 | 2387 | msr_info->data = vcpu->arch.time; |
18068523 | 2388 | break; |
344d9588 | 2389 | case MSR_KVM_ASYNC_PF_EN: |
609e36d3 | 2390 | msr_info->data = vcpu->arch.apf.msr_val; |
344d9588 | 2391 | break; |
c9aaa895 | 2392 | case MSR_KVM_STEAL_TIME: |
609e36d3 | 2393 | msr_info->data = vcpu->arch.st.msr_val; |
c9aaa895 | 2394 | break; |
1d92128f | 2395 | case MSR_KVM_PV_EOI_EN: |
609e36d3 | 2396 | msr_info->data = vcpu->arch.pv_eoi.msr_val; |
1d92128f | 2397 | break; |
890ca9ae HY |
2398 | case MSR_IA32_P5_MC_ADDR: |
2399 | case MSR_IA32_P5_MC_TYPE: | |
2400 | case MSR_IA32_MCG_CAP: | |
2401 | case MSR_IA32_MCG_CTL: | |
2402 | case MSR_IA32_MCG_STATUS: | |
81760dcc | 2403 | case MSR_IA32_MC0_CTL ... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS) - 1: |
609e36d3 | 2404 | return get_msr_mce(vcpu, msr_info->index, &msr_info->data); |
84e0cefa JS |
2405 | case MSR_K7_CLK_CTL: |
2406 | /* | |
2407 | * Provide expected ramp-up count for K7. All other | |
2408 | * are set to zero, indicating minimum divisors for | |
2409 | * every field. | |
2410 | * | |
2411 | * This prevents guest kernels on AMD host with CPU | |
2412 | * type 6, model 8 and higher from exploding due to | |
2413 | * the rdmsr failing. | |
2414 | */ | |
609e36d3 | 2415 | msr_info->data = 0x20000000; |
84e0cefa | 2416 | break; |
55cd8e5a | 2417 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
e7d9513b AS |
2418 | case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: |
2419 | case HV_X64_MSR_CRASH_CTL: | |
1f4b34f8 | 2420 | case HV_X64_MSR_STIMER0_CONFIG ... HV_X64_MSR_STIMER3_COUNT: |
e83d5887 AS |
2421 | return kvm_hv_get_msr_common(vcpu, |
2422 | msr_info->index, &msr_info->data); | |
55cd8e5a | 2423 | break; |
91c9c3ed | 2424 | case MSR_IA32_BBL_CR_CTL3: |
2425 | /* This legacy MSR exists but isn't fully documented in current | |
2426 | * silicon. It is however accessed by winxp in very narrow | |
2427 | * scenarios where it sets bit #19, itself documented as | |
2428 | * a "reserved" bit. Best effort attempt to source coherent | |
2429 | * read data here should the balance of the register be | |
2430 | * interpreted by the guest: | |
2431 | * | |
2432 | * L2 cache control register 3: 64GB range, 256KB size, | |
2433 | * enabled, latency 0x1, configured | |
2434 | */ | |
609e36d3 | 2435 | msr_info->data = 0xbe702111; |
91c9c3ed | 2436 | break; |
2b036c6b BO |
2437 | case MSR_AMD64_OSVW_ID_LENGTH: |
2438 | if (!guest_cpuid_has_osvw(vcpu)) | |
2439 | return 1; | |
609e36d3 | 2440 | msr_info->data = vcpu->arch.osvw.length; |
2b036c6b BO |
2441 | break; |
2442 | case MSR_AMD64_OSVW_STATUS: | |
2443 | if (!guest_cpuid_has_osvw(vcpu)) | |
2444 | return 1; | |
609e36d3 | 2445 | msr_info->data = vcpu->arch.osvw.status; |
2b036c6b | 2446 | break; |
15c4a640 | 2447 | default: |
c6702c9d | 2448 | if (kvm_pmu_is_valid_msr(vcpu, msr_info->index)) |
609e36d3 | 2449 | return kvm_pmu_get_msr(vcpu, msr_info->index, &msr_info->data); |
ed85c068 | 2450 | if (!ignore_msrs) { |
609e36d3 | 2451 | vcpu_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr_info->index); |
ed85c068 AP |
2452 | return 1; |
2453 | } else { | |
609e36d3 PB |
2454 | vcpu_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr_info->index); |
2455 | msr_info->data = 0; | |
ed85c068 AP |
2456 | } |
2457 | break; | |
15c4a640 | 2458 | } |
15c4a640 CO |
2459 | return 0; |
2460 | } | |
2461 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
2462 | ||
313a3dc7 CO |
2463 | /* |
2464 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
2465 | * | |
2466 | * @return number of msrs set successfully. | |
2467 | */ | |
2468 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
2469 | struct kvm_msr_entry *entries, | |
2470 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2471 | unsigned index, u64 *data)) | |
2472 | { | |
f656ce01 | 2473 | int i, idx; |
313a3dc7 | 2474 | |
f656ce01 | 2475 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
313a3dc7 CO |
2476 | for (i = 0; i < msrs->nmsrs; ++i) |
2477 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2478 | break; | |
f656ce01 | 2479 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 2480 | |
313a3dc7 CO |
2481 | return i; |
2482 | } | |
2483 | ||
2484 | /* | |
2485 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2486 | * | |
2487 | * @return number of msrs set successfully. | |
2488 | */ | |
2489 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
2490 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2491 | unsigned index, u64 *data), | |
2492 | int writeback) | |
2493 | { | |
2494 | struct kvm_msrs msrs; | |
2495 | struct kvm_msr_entry *entries; | |
2496 | int r, n; | |
2497 | unsigned size; | |
2498 | ||
2499 | r = -EFAULT; | |
2500 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
2501 | goto out; | |
2502 | ||
2503 | r = -E2BIG; | |
2504 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2505 | goto out; | |
2506 | ||
313a3dc7 | 2507 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; |
ff5c2c03 SL |
2508 | entries = memdup_user(user_msrs->entries, size); |
2509 | if (IS_ERR(entries)) { | |
2510 | r = PTR_ERR(entries); | |
313a3dc7 | 2511 | goto out; |
ff5c2c03 | 2512 | } |
313a3dc7 CO |
2513 | |
2514 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
2515 | if (r < 0) | |
2516 | goto out_free; | |
2517 | ||
2518 | r = -EFAULT; | |
2519 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2520 | goto out_free; | |
2521 | ||
2522 | r = n; | |
2523 | ||
2524 | out_free: | |
7a73c028 | 2525 | kfree(entries); |
313a3dc7 CO |
2526 | out: |
2527 | return r; | |
2528 | } | |
2529 | ||
784aa3d7 | 2530 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
018d00d2 ZX |
2531 | { |
2532 | int r; | |
2533 | ||
2534 | switch (ext) { | |
2535 | case KVM_CAP_IRQCHIP: | |
2536 | case KVM_CAP_HLT: | |
2537 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 2538 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 2539 | case KVM_CAP_EXT_CPUID: |
9c15bb1d | 2540 | case KVM_CAP_EXT_EMUL_CPUID: |
c8076604 | 2541 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 2542 | case KVM_CAP_PIT: |
a28e4f5a | 2543 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 2544 | case KVM_CAP_MP_STATE: |
ed848624 | 2545 | case KVM_CAP_SYNC_MMU: |
a355c85c | 2546 | case KVM_CAP_USER_NMI: |
52d939a0 | 2547 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 2548 | case KVM_CAP_IRQ_INJECT_STATUS: |
d34e6b17 | 2549 | case KVM_CAP_IOEVENTFD: |
f848a5a8 | 2550 | case KVM_CAP_IOEVENTFD_NO_LENGTH: |
c5ff41ce | 2551 | case KVM_CAP_PIT2: |
e9f42757 | 2552 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 2553 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 2554 | case KVM_CAP_XEN_HVM: |
afbcf7ab | 2555 | case KVM_CAP_ADJUST_CLOCK: |
3cfc3092 | 2556 | case KVM_CAP_VCPU_EVENTS: |
55cd8e5a | 2557 | case KVM_CAP_HYPERV: |
10388a07 | 2558 | case KVM_CAP_HYPERV_VAPIC: |
c25bc163 | 2559 | case KVM_CAP_HYPERV_SPIN: |
5c919412 | 2560 | case KVM_CAP_HYPERV_SYNIC: |
ab9f4ecb | 2561 | case KVM_CAP_PCI_SEGMENT: |
a1efbe77 | 2562 | case KVM_CAP_DEBUGREGS: |
d2be1651 | 2563 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
2d5b5a66 | 2564 | case KVM_CAP_XSAVE: |
344d9588 | 2565 | case KVM_CAP_ASYNC_PF: |
92a1f12d | 2566 | case KVM_CAP_GET_TSC_KHZ: |
1c0b28c2 | 2567 | case KVM_CAP_KVMCLOCK_CTRL: |
4d8b81ab | 2568 | case KVM_CAP_READONLY_MEM: |
5f66b620 | 2569 | case KVM_CAP_HYPERV_TIME: |
100943c5 | 2570 | case KVM_CAP_IOAPIC_POLARITY_IGNORED: |
defcf51f | 2571 | case KVM_CAP_TSC_DEADLINE_TIMER: |
90de4a18 NA |
2572 | case KVM_CAP_ENABLE_CAP_VM: |
2573 | case KVM_CAP_DISABLE_QUIRKS: | |
d71ba788 | 2574 | case KVM_CAP_SET_BOOT_CPU_ID: |
49df6397 | 2575 | case KVM_CAP_SPLIT_IRQCHIP: |
2a5bab10 AW |
2576 | #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT |
2577 | case KVM_CAP_ASSIGN_DEV_IRQ: | |
2578 | case KVM_CAP_PCI_2_3: | |
2579 | #endif | |
018d00d2 ZX |
2580 | r = 1; |
2581 | break; | |
6d396b55 PB |
2582 | case KVM_CAP_X86_SMM: |
2583 | /* SMBASE is usually relocated above 1M on modern chipsets, | |
2584 | * and SMM handlers might indeed rely on 4G segment limits, | |
2585 | * so do not report SMM to be available if real mode is | |
2586 | * emulated via vm86 mode. Still, do not go to great lengths | |
2587 | * to avoid userspace's usage of the feature, because it is a | |
2588 | * fringe case that is not enabled except via specific settings | |
2589 | * of the module parameters. | |
2590 | */ | |
2591 | r = kvm_x86_ops->cpu_has_high_real_mode_segbase(); | |
2592 | break; | |
542472b5 LV |
2593 | case KVM_CAP_COALESCED_MMIO: |
2594 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
2595 | break; | |
774ead3a AK |
2596 | case KVM_CAP_VAPIC: |
2597 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
2598 | break; | |
f725230a | 2599 | case KVM_CAP_NR_VCPUS: |
8c3ba334 SL |
2600 | r = KVM_SOFT_MAX_VCPUS; |
2601 | break; | |
2602 | case KVM_CAP_MAX_VCPUS: | |
f725230a AK |
2603 | r = KVM_MAX_VCPUS; |
2604 | break; | |
a988b910 | 2605 | case KVM_CAP_NR_MEMSLOTS: |
bbacc0c1 | 2606 | r = KVM_USER_MEM_SLOTS; |
a988b910 | 2607 | break; |
a68a6a72 MT |
2608 | case KVM_CAP_PV_MMU: /* obsolete */ |
2609 | r = 0; | |
2f333bcb | 2610 | break; |
4cee4b72 | 2611 | #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT |
62c476c7 | 2612 | case KVM_CAP_IOMMU: |
a1b60c1c | 2613 | r = iommu_present(&pci_bus_type); |
62c476c7 | 2614 | break; |
4cee4b72 | 2615 | #endif |
890ca9ae HY |
2616 | case KVM_CAP_MCE: |
2617 | r = KVM_MAX_MCE_BANKS; | |
2618 | break; | |
2d5b5a66 | 2619 | case KVM_CAP_XCRS: |
d366bf7e | 2620 | r = boot_cpu_has(X86_FEATURE_XSAVE); |
2d5b5a66 | 2621 | break; |
92a1f12d JR |
2622 | case KVM_CAP_TSC_CONTROL: |
2623 | r = kvm_has_tsc_control; | |
2624 | break; | |
018d00d2 ZX |
2625 | default: |
2626 | r = 0; | |
2627 | break; | |
2628 | } | |
2629 | return r; | |
2630 | ||
2631 | } | |
2632 | ||
043405e1 CO |
2633 | long kvm_arch_dev_ioctl(struct file *filp, |
2634 | unsigned int ioctl, unsigned long arg) | |
2635 | { | |
2636 | void __user *argp = (void __user *)arg; | |
2637 | long r; | |
2638 | ||
2639 | switch (ioctl) { | |
2640 | case KVM_GET_MSR_INDEX_LIST: { | |
2641 | struct kvm_msr_list __user *user_msr_list = argp; | |
2642 | struct kvm_msr_list msr_list; | |
2643 | unsigned n; | |
2644 | ||
2645 | r = -EFAULT; | |
2646 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
2647 | goto out; | |
2648 | n = msr_list.nmsrs; | |
62ef68bb | 2649 | msr_list.nmsrs = num_msrs_to_save + num_emulated_msrs; |
043405e1 CO |
2650 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
2651 | goto out; | |
2652 | r = -E2BIG; | |
e125e7b6 | 2653 | if (n < msr_list.nmsrs) |
043405e1 CO |
2654 | goto out; |
2655 | r = -EFAULT; | |
2656 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
2657 | num_msrs_to_save * sizeof(u32))) | |
2658 | goto out; | |
e125e7b6 | 2659 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 | 2660 | &emulated_msrs, |
62ef68bb | 2661 | num_emulated_msrs * sizeof(u32))) |
043405e1 CO |
2662 | goto out; |
2663 | r = 0; | |
2664 | break; | |
2665 | } | |
9c15bb1d BP |
2666 | case KVM_GET_SUPPORTED_CPUID: |
2667 | case KVM_GET_EMULATED_CPUID: { | |
674eea0f AK |
2668 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
2669 | struct kvm_cpuid2 cpuid; | |
2670 | ||
2671 | r = -EFAULT; | |
2672 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2673 | goto out; | |
9c15bb1d BP |
2674 | |
2675 | r = kvm_dev_ioctl_get_cpuid(&cpuid, cpuid_arg->entries, | |
2676 | ioctl); | |
674eea0f AK |
2677 | if (r) |
2678 | goto out; | |
2679 | ||
2680 | r = -EFAULT; | |
2681 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2682 | goto out; | |
2683 | r = 0; | |
2684 | break; | |
2685 | } | |
890ca9ae HY |
2686 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
2687 | u64 mce_cap; | |
2688 | ||
2689 | mce_cap = KVM_MCE_CAP_SUPPORTED; | |
2690 | r = -EFAULT; | |
2691 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) | |
2692 | goto out; | |
2693 | r = 0; | |
2694 | break; | |
2695 | } | |
043405e1 CO |
2696 | default: |
2697 | r = -EINVAL; | |
2698 | } | |
2699 | out: | |
2700 | return r; | |
2701 | } | |
2702 | ||
f5f48ee1 SY |
2703 | static void wbinvd_ipi(void *garbage) |
2704 | { | |
2705 | wbinvd(); | |
2706 | } | |
2707 | ||
2708 | static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
2709 | { | |
e0f0bbc5 | 2710 | return kvm_arch_has_noncoherent_dma(vcpu->kvm); |
f5f48ee1 SY |
2711 | } |
2712 | ||
2860c4b1 PB |
2713 | static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) |
2714 | { | |
2715 | set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); | |
2716 | } | |
2717 | ||
313a3dc7 CO |
2718 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
2719 | { | |
f5f48ee1 SY |
2720 | /* Address WBINVD may be executed by guest */ |
2721 | if (need_emulate_wbinvd(vcpu)) { | |
2722 | if (kvm_x86_ops->has_wbinvd_exit()) | |
2723 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
2724 | else if (vcpu->cpu != -1 && vcpu->cpu != cpu) | |
2725 | smp_call_function_single(vcpu->cpu, | |
2726 | wbinvd_ipi, NULL, 1); | |
2727 | } | |
2728 | ||
313a3dc7 | 2729 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
8f6055cb | 2730 | |
0dd6a6ed ZA |
2731 | /* Apply any externally detected TSC adjustments (due to suspend) */ |
2732 | if (unlikely(vcpu->arch.tsc_offset_adjustment)) { | |
2733 | adjust_tsc_offset_host(vcpu, vcpu->arch.tsc_offset_adjustment); | |
2734 | vcpu->arch.tsc_offset_adjustment = 0; | |
105b21bb | 2735 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0dd6a6ed | 2736 | } |
8f6055cb | 2737 | |
48434c20 | 2738 | if (unlikely(vcpu->cpu != cpu) || check_tsc_unstable()) { |
6f526ec5 | 2739 | s64 tsc_delta = !vcpu->arch.last_host_tsc ? 0 : |
4ea1636b | 2740 | rdtsc() - vcpu->arch.last_host_tsc; |
e48672fa ZA |
2741 | if (tsc_delta < 0) |
2742 | mark_tsc_unstable("KVM discovered backwards TSC"); | |
c285545f | 2743 | if (check_tsc_unstable()) { |
07c1419a | 2744 | u64 offset = kvm_compute_tsc_offset(vcpu, |
b183aa58 ZA |
2745 | vcpu->arch.last_guest_tsc); |
2746 | kvm_x86_ops->write_tsc_offset(vcpu, offset); | |
c285545f | 2747 | vcpu->arch.tsc_catchup = 1; |
c285545f | 2748 | } |
d98d07ca MT |
2749 | /* |
2750 | * On a host with synchronized TSC, there is no need to update | |
2751 | * kvmclock on vcpu->cpu migration | |
2752 | */ | |
2753 | if (!vcpu->kvm->arch.use_master_clock || vcpu->cpu == -1) | |
0061d53d | 2754 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
c285545f ZA |
2755 | if (vcpu->cpu != cpu) |
2756 | kvm_migrate_timers(vcpu); | |
e48672fa | 2757 | vcpu->cpu = cpu; |
6b7d7e76 | 2758 | } |
c9aaa895 | 2759 | |
c9aaa895 | 2760 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); |
313a3dc7 CO |
2761 | } |
2762 | ||
2763 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
2764 | { | |
02daab21 | 2765 | kvm_x86_ops->vcpu_put(vcpu); |
1c11e713 | 2766 | kvm_put_guest_fpu(vcpu); |
4ea1636b | 2767 | vcpu->arch.last_host_tsc = rdtsc(); |
313a3dc7 CO |
2768 | } |
2769 | ||
313a3dc7 CO |
2770 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
2771 | struct kvm_lapic_state *s) | |
2772 | { | |
d62caabb AS |
2773 | if (vcpu->arch.apicv_active) |
2774 | kvm_x86_ops->sync_pir_to_irr(vcpu); | |
2775 | ||
ad312c7c | 2776 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
2777 | |
2778 | return 0; | |
2779 | } | |
2780 | ||
2781 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
2782 | struct kvm_lapic_state *s) | |
2783 | { | |
64eb0620 | 2784 | kvm_apic_post_state_restore(vcpu, s); |
cb142eb7 | 2785 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
2786 | |
2787 | return 0; | |
2788 | } | |
2789 | ||
127a457a MG |
2790 | static int kvm_cpu_accept_dm_intr(struct kvm_vcpu *vcpu) |
2791 | { | |
2792 | return (!lapic_in_kernel(vcpu) || | |
2793 | kvm_apic_accept_pic_intr(vcpu)); | |
2794 | } | |
2795 | ||
782d422b MG |
2796 | /* |
2797 | * if userspace requested an interrupt window, check that the | |
2798 | * interrupt window is open. | |
2799 | * | |
2800 | * No need to exit to userspace if we already have an interrupt queued. | |
2801 | */ | |
2802 | static int kvm_vcpu_ready_for_interrupt_injection(struct kvm_vcpu *vcpu) | |
2803 | { | |
2804 | return kvm_arch_interrupt_allowed(vcpu) && | |
2805 | !kvm_cpu_has_interrupt(vcpu) && | |
2806 | !kvm_event_needs_reinjection(vcpu) && | |
2807 | kvm_cpu_accept_dm_intr(vcpu); | |
2808 | } | |
2809 | ||
f77bc6a4 ZX |
2810 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2811 | struct kvm_interrupt *irq) | |
2812 | { | |
02cdb50f | 2813 | if (irq->irq >= KVM_NR_INTERRUPTS) |
f77bc6a4 | 2814 | return -EINVAL; |
1c1a9ce9 SR |
2815 | |
2816 | if (!irqchip_in_kernel(vcpu->kvm)) { | |
2817 | kvm_queue_interrupt(vcpu, irq->irq, false); | |
2818 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
2819 | return 0; | |
2820 | } | |
2821 | ||
2822 | /* | |
2823 | * With in-kernel LAPIC, we only use this to inject EXTINT, so | |
2824 | * fail for in-kernel 8259. | |
2825 | */ | |
2826 | if (pic_in_kernel(vcpu->kvm)) | |
f77bc6a4 | 2827 | return -ENXIO; |
f77bc6a4 | 2828 | |
1c1a9ce9 SR |
2829 | if (vcpu->arch.pending_external_vector != -1) |
2830 | return -EEXIST; | |
f77bc6a4 | 2831 | |
1c1a9ce9 | 2832 | vcpu->arch.pending_external_vector = irq->irq; |
934bf653 | 2833 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f77bc6a4 ZX |
2834 | return 0; |
2835 | } | |
2836 | ||
c4abb7c9 JK |
2837 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
2838 | { | |
c4abb7c9 | 2839 | kvm_inject_nmi(vcpu); |
c4abb7c9 JK |
2840 | |
2841 | return 0; | |
2842 | } | |
2843 | ||
f077825a PB |
2844 | static int kvm_vcpu_ioctl_smi(struct kvm_vcpu *vcpu) |
2845 | { | |
64d60670 PB |
2846 | kvm_make_request(KVM_REQ_SMI, vcpu); |
2847 | ||
f077825a PB |
2848 | return 0; |
2849 | } | |
2850 | ||
b209749f AK |
2851 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
2852 | struct kvm_tpr_access_ctl *tac) | |
2853 | { | |
2854 | if (tac->flags) | |
2855 | return -EINVAL; | |
2856 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
2857 | return 0; | |
2858 | } | |
2859 | ||
890ca9ae HY |
2860 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
2861 | u64 mcg_cap) | |
2862 | { | |
2863 | int r; | |
2864 | unsigned bank_num = mcg_cap & 0xff, bank; | |
2865 | ||
2866 | r = -EINVAL; | |
a9e38c3e | 2867 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae HY |
2868 | goto out; |
2869 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) | |
2870 | goto out; | |
2871 | r = 0; | |
2872 | vcpu->arch.mcg_cap = mcg_cap; | |
2873 | /* Init IA32_MCG_CTL to all 1s */ | |
2874 | if (mcg_cap & MCG_CTL_P) | |
2875 | vcpu->arch.mcg_ctl = ~(u64)0; | |
2876 | /* Init IA32_MCi_CTL to all 1s */ | |
2877 | for (bank = 0; bank < bank_num; bank++) | |
2878 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
2879 | out: | |
2880 | return r; | |
2881 | } | |
2882 | ||
2883 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
2884 | struct kvm_x86_mce *mce) | |
2885 | { | |
2886 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
2887 | unsigned bank_num = mcg_cap & 0xff; | |
2888 | u64 *banks = vcpu->arch.mce_banks; | |
2889 | ||
2890 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
2891 | return -EINVAL; | |
2892 | /* | |
2893 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
2894 | * reporting is disabled | |
2895 | */ | |
2896 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
2897 | vcpu->arch.mcg_ctl != ~(u64)0) | |
2898 | return 0; | |
2899 | banks += 4 * mce->bank; | |
2900 | /* | |
2901 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
2902 | * reporting is disabled for the bank | |
2903 | */ | |
2904 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
2905 | return 0; | |
2906 | if (mce->status & MCI_STATUS_UC) { | |
2907 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 2908 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
a8eeb04a | 2909 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
890ca9ae HY |
2910 | return 0; |
2911 | } | |
2912 | if (banks[1] & MCI_STATUS_VAL) | |
2913 | mce->status |= MCI_STATUS_OVER; | |
2914 | banks[2] = mce->addr; | |
2915 | banks[3] = mce->misc; | |
2916 | vcpu->arch.mcg_status = mce->mcg_status; | |
2917 | banks[1] = mce->status; | |
2918 | kvm_queue_exception(vcpu, MC_VECTOR); | |
2919 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
2920 | || !(banks[1] & MCI_STATUS_UC)) { | |
2921 | if (banks[1] & MCI_STATUS_VAL) | |
2922 | mce->status |= MCI_STATUS_OVER; | |
2923 | banks[2] = mce->addr; | |
2924 | banks[3] = mce->misc; | |
2925 | banks[1] = mce->status; | |
2926 | } else | |
2927 | banks[1] |= MCI_STATUS_OVER; | |
2928 | return 0; | |
2929 | } | |
2930 | ||
3cfc3092 JK |
2931 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
2932 | struct kvm_vcpu_events *events) | |
2933 | { | |
7460fb4a | 2934 | process_nmi(vcpu); |
03b82a30 JK |
2935 | events->exception.injected = |
2936 | vcpu->arch.exception.pending && | |
2937 | !kvm_exception_is_soft(vcpu->arch.exception.nr); | |
3cfc3092 JK |
2938 | events->exception.nr = vcpu->arch.exception.nr; |
2939 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
97e69aa6 | 2940 | events->exception.pad = 0; |
3cfc3092 JK |
2941 | events->exception.error_code = vcpu->arch.exception.error_code; |
2942 | ||
03b82a30 JK |
2943 | events->interrupt.injected = |
2944 | vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft; | |
3cfc3092 | 2945 | events->interrupt.nr = vcpu->arch.interrupt.nr; |
03b82a30 | 2946 | events->interrupt.soft = 0; |
37ccdcbe | 2947 | events->interrupt.shadow = kvm_x86_ops->get_interrupt_shadow(vcpu); |
3cfc3092 JK |
2948 | |
2949 | events->nmi.injected = vcpu->arch.nmi_injected; | |
7460fb4a | 2950 | events->nmi.pending = vcpu->arch.nmi_pending != 0; |
3cfc3092 | 2951 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); |
97e69aa6 | 2952 | events->nmi.pad = 0; |
3cfc3092 | 2953 | |
66450a21 | 2954 | events->sipi_vector = 0; /* never valid when reporting to user space */ |
3cfc3092 | 2955 | |
f077825a PB |
2956 | events->smi.smm = is_smm(vcpu); |
2957 | events->smi.pending = vcpu->arch.smi_pending; | |
2958 | events->smi.smm_inside_nmi = | |
2959 | !!(vcpu->arch.hflags & HF_SMM_INSIDE_NMI_MASK); | |
2960 | events->smi.latched_init = kvm_lapic_latched_init(vcpu); | |
2961 | ||
dab4b911 | 2962 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
f077825a PB |
2963 | | KVM_VCPUEVENT_VALID_SHADOW |
2964 | | KVM_VCPUEVENT_VALID_SMM); | |
97e69aa6 | 2965 | memset(&events->reserved, 0, sizeof(events->reserved)); |
3cfc3092 JK |
2966 | } |
2967 | ||
2968 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, | |
2969 | struct kvm_vcpu_events *events) | |
2970 | { | |
dab4b911 | 2971 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 | 2972 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
f077825a PB |
2973 | | KVM_VCPUEVENT_VALID_SHADOW |
2974 | | KVM_VCPUEVENT_VALID_SMM)) | |
3cfc3092 JK |
2975 | return -EINVAL; |
2976 | ||
78e546c8 PB |
2977 | if (events->exception.injected && |
2978 | (events->exception.nr > 31 || events->exception.nr == NMI_VECTOR)) | |
2979 | return -EINVAL; | |
2980 | ||
7460fb4a | 2981 | process_nmi(vcpu); |
3cfc3092 JK |
2982 | vcpu->arch.exception.pending = events->exception.injected; |
2983 | vcpu->arch.exception.nr = events->exception.nr; | |
2984 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
2985 | vcpu->arch.exception.error_code = events->exception.error_code; | |
2986 | ||
2987 | vcpu->arch.interrupt.pending = events->interrupt.injected; | |
2988 | vcpu->arch.interrupt.nr = events->interrupt.nr; | |
2989 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
48005f64 JK |
2990 | if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) |
2991 | kvm_x86_ops->set_interrupt_shadow(vcpu, | |
2992 | events->interrupt.shadow); | |
3cfc3092 JK |
2993 | |
2994 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
2995 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
2996 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
2997 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
2998 | ||
66450a21 | 2999 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR && |
bce87cce | 3000 | lapic_in_kernel(vcpu)) |
66450a21 | 3001 | vcpu->arch.apic->sipi_vector = events->sipi_vector; |
3cfc3092 | 3002 | |
f077825a PB |
3003 | if (events->flags & KVM_VCPUEVENT_VALID_SMM) { |
3004 | if (events->smi.smm) | |
3005 | vcpu->arch.hflags |= HF_SMM_MASK; | |
3006 | else | |
3007 | vcpu->arch.hflags &= ~HF_SMM_MASK; | |
3008 | vcpu->arch.smi_pending = events->smi.pending; | |
3009 | if (events->smi.smm_inside_nmi) | |
3010 | vcpu->arch.hflags |= HF_SMM_INSIDE_NMI_MASK; | |
3011 | else | |
3012 | vcpu->arch.hflags &= ~HF_SMM_INSIDE_NMI_MASK; | |
bce87cce | 3013 | if (lapic_in_kernel(vcpu)) { |
f077825a PB |
3014 | if (events->smi.latched_init) |
3015 | set_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); | |
3016 | else | |
3017 | clear_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); | |
3018 | } | |
3019 | } | |
3020 | ||
3842d135 AK |
3021 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
3022 | ||
3cfc3092 JK |
3023 | return 0; |
3024 | } | |
3025 | ||
a1efbe77 JK |
3026 | static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, |
3027 | struct kvm_debugregs *dbgregs) | |
3028 | { | |
73aaf249 JK |
3029 | unsigned long val; |
3030 | ||
a1efbe77 | 3031 | memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db)); |
16f8a6f9 | 3032 | kvm_get_dr(vcpu, 6, &val); |
73aaf249 | 3033 | dbgregs->dr6 = val; |
a1efbe77 JK |
3034 | dbgregs->dr7 = vcpu->arch.dr7; |
3035 | dbgregs->flags = 0; | |
97e69aa6 | 3036 | memset(&dbgregs->reserved, 0, sizeof(dbgregs->reserved)); |
a1efbe77 JK |
3037 | } |
3038 | ||
3039 | static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, | |
3040 | struct kvm_debugregs *dbgregs) | |
3041 | { | |
3042 | if (dbgregs->flags) | |
3043 | return -EINVAL; | |
3044 | ||
d14bdb55 PB |
3045 | if (dbgregs->dr6 & ~0xffffffffull) |
3046 | return -EINVAL; | |
3047 | if (dbgregs->dr7 & ~0xffffffffull) | |
3048 | return -EINVAL; | |
3049 | ||
a1efbe77 | 3050 | memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db)); |
ae561ede | 3051 | kvm_update_dr0123(vcpu); |
a1efbe77 | 3052 | vcpu->arch.dr6 = dbgregs->dr6; |
73aaf249 | 3053 | kvm_update_dr6(vcpu); |
a1efbe77 | 3054 | vcpu->arch.dr7 = dbgregs->dr7; |
9926c9fd | 3055 | kvm_update_dr7(vcpu); |
a1efbe77 | 3056 | |
a1efbe77 JK |
3057 | return 0; |
3058 | } | |
3059 | ||
df1daba7 PB |
3060 | #define XSTATE_COMPACTION_ENABLED (1ULL << 63) |
3061 | ||
3062 | static void fill_xsave(u8 *dest, struct kvm_vcpu *vcpu) | |
3063 | { | |
c47ada30 | 3064 | struct xregs_state *xsave = &vcpu->arch.guest_fpu.state.xsave; |
400e4b20 | 3065 | u64 xstate_bv = xsave->header.xfeatures; |
df1daba7 PB |
3066 | u64 valid; |
3067 | ||
3068 | /* | |
3069 | * Copy legacy XSAVE area, to avoid complications with CPUID | |
3070 | * leaves 0 and 1 in the loop below. | |
3071 | */ | |
3072 | memcpy(dest, xsave, XSAVE_HDR_OFFSET); | |
3073 | ||
3074 | /* Set XSTATE_BV */ | |
3075 | *(u64 *)(dest + XSAVE_HDR_OFFSET) = xstate_bv; | |
3076 | ||
3077 | /* | |
3078 | * Copy each region from the possibly compacted offset to the | |
3079 | * non-compacted offset. | |
3080 | */ | |
d91cab78 | 3081 | valid = xstate_bv & ~XFEATURE_MASK_FPSSE; |
df1daba7 PB |
3082 | while (valid) { |
3083 | u64 feature = valid & -valid; | |
3084 | int index = fls64(feature) - 1; | |
3085 | void *src = get_xsave_addr(xsave, feature); | |
3086 | ||
3087 | if (src) { | |
3088 | u32 size, offset, ecx, edx; | |
3089 | cpuid_count(XSTATE_CPUID, index, | |
3090 | &size, &offset, &ecx, &edx); | |
3091 | memcpy(dest + offset, src, size); | |
3092 | } | |
3093 | ||
3094 | valid -= feature; | |
3095 | } | |
3096 | } | |
3097 | ||
3098 | static void load_xsave(struct kvm_vcpu *vcpu, u8 *src) | |
3099 | { | |
c47ada30 | 3100 | struct xregs_state *xsave = &vcpu->arch.guest_fpu.state.xsave; |
df1daba7 PB |
3101 | u64 xstate_bv = *(u64 *)(src + XSAVE_HDR_OFFSET); |
3102 | u64 valid; | |
3103 | ||
3104 | /* | |
3105 | * Copy legacy XSAVE area, to avoid complications with CPUID | |
3106 | * leaves 0 and 1 in the loop below. | |
3107 | */ | |
3108 | memcpy(xsave, src, XSAVE_HDR_OFFSET); | |
3109 | ||
3110 | /* Set XSTATE_BV and possibly XCOMP_BV. */ | |
400e4b20 | 3111 | xsave->header.xfeatures = xstate_bv; |
782511b0 | 3112 | if (boot_cpu_has(X86_FEATURE_XSAVES)) |
3a54450b | 3113 | xsave->header.xcomp_bv = host_xcr0 | XSTATE_COMPACTION_ENABLED; |
df1daba7 PB |
3114 | |
3115 | /* | |
3116 | * Copy each region from the non-compacted offset to the | |
3117 | * possibly compacted offset. | |
3118 | */ | |
d91cab78 | 3119 | valid = xstate_bv & ~XFEATURE_MASK_FPSSE; |
df1daba7 PB |
3120 | while (valid) { |
3121 | u64 feature = valid & -valid; | |
3122 | int index = fls64(feature) - 1; | |
3123 | void *dest = get_xsave_addr(xsave, feature); | |
3124 | ||
3125 | if (dest) { | |
3126 | u32 size, offset, ecx, edx; | |
3127 | cpuid_count(XSTATE_CPUID, index, | |
3128 | &size, &offset, &ecx, &edx); | |
3129 | memcpy(dest, src + offset, size); | |
ee4100da | 3130 | } |
df1daba7 PB |
3131 | |
3132 | valid -= feature; | |
3133 | } | |
3134 | } | |
3135 | ||
2d5b5a66 SY |
3136 | static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu, |
3137 | struct kvm_xsave *guest_xsave) | |
3138 | { | |
d366bf7e | 3139 | if (boot_cpu_has(X86_FEATURE_XSAVE)) { |
df1daba7 PB |
3140 | memset(guest_xsave, 0, sizeof(struct kvm_xsave)); |
3141 | fill_xsave((u8 *) guest_xsave->region, vcpu); | |
4344ee98 | 3142 | } else { |
2d5b5a66 | 3143 | memcpy(guest_xsave->region, |
7366ed77 | 3144 | &vcpu->arch.guest_fpu.state.fxsave, |
c47ada30 | 3145 | sizeof(struct fxregs_state)); |
2d5b5a66 | 3146 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] = |
d91cab78 | 3147 | XFEATURE_MASK_FPSSE; |
2d5b5a66 SY |
3148 | } |
3149 | } | |
3150 | ||
3151 | static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu, | |
3152 | struct kvm_xsave *guest_xsave) | |
3153 | { | |
3154 | u64 xstate_bv = | |
3155 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)]; | |
3156 | ||
d366bf7e | 3157 | if (boot_cpu_has(X86_FEATURE_XSAVE)) { |
d7876f1b PB |
3158 | /* |
3159 | * Here we allow setting states that are not present in | |
3160 | * CPUID leaf 0xD, index 0, EDX:EAX. This is for compatibility | |
3161 | * with old userspace. | |
3162 | */ | |
4ff41732 | 3163 | if (xstate_bv & ~kvm_supported_xcr0()) |
d7876f1b | 3164 | return -EINVAL; |
df1daba7 | 3165 | load_xsave(vcpu, (u8 *)guest_xsave->region); |
d7876f1b | 3166 | } else { |
d91cab78 | 3167 | if (xstate_bv & ~XFEATURE_MASK_FPSSE) |
2d5b5a66 | 3168 | return -EINVAL; |
7366ed77 | 3169 | memcpy(&vcpu->arch.guest_fpu.state.fxsave, |
c47ada30 | 3170 | guest_xsave->region, sizeof(struct fxregs_state)); |
2d5b5a66 SY |
3171 | } |
3172 | return 0; | |
3173 | } | |
3174 | ||
3175 | static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu, | |
3176 | struct kvm_xcrs *guest_xcrs) | |
3177 | { | |
d366bf7e | 3178 | if (!boot_cpu_has(X86_FEATURE_XSAVE)) { |
2d5b5a66 SY |
3179 | guest_xcrs->nr_xcrs = 0; |
3180 | return; | |
3181 | } | |
3182 | ||
3183 | guest_xcrs->nr_xcrs = 1; | |
3184 | guest_xcrs->flags = 0; | |
3185 | guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK; | |
3186 | guest_xcrs->xcrs[0].value = vcpu->arch.xcr0; | |
3187 | } | |
3188 | ||
3189 | static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu, | |
3190 | struct kvm_xcrs *guest_xcrs) | |
3191 | { | |
3192 | int i, r = 0; | |
3193 | ||
d366bf7e | 3194 | if (!boot_cpu_has(X86_FEATURE_XSAVE)) |
2d5b5a66 SY |
3195 | return -EINVAL; |
3196 | ||
3197 | if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags) | |
3198 | return -EINVAL; | |
3199 | ||
3200 | for (i = 0; i < guest_xcrs->nr_xcrs; i++) | |
3201 | /* Only support XCR0 currently */ | |
c67a04cb | 3202 | if (guest_xcrs->xcrs[i].xcr == XCR_XFEATURE_ENABLED_MASK) { |
2d5b5a66 | 3203 | r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK, |
c67a04cb | 3204 | guest_xcrs->xcrs[i].value); |
2d5b5a66 SY |
3205 | break; |
3206 | } | |
3207 | if (r) | |
3208 | r = -EINVAL; | |
3209 | return r; | |
3210 | } | |
3211 | ||
1c0b28c2 EM |
3212 | /* |
3213 | * kvm_set_guest_paused() indicates to the guest kernel that it has been | |
3214 | * stopped by the hypervisor. This function will be called from the host only. | |
3215 | * EINVAL is returned when the host attempts to set the flag for a guest that | |
3216 | * does not support pv clocks. | |
3217 | */ | |
3218 | static int kvm_set_guest_paused(struct kvm_vcpu *vcpu) | |
3219 | { | |
0b79459b | 3220 | if (!vcpu->arch.pv_time_enabled) |
1c0b28c2 | 3221 | return -EINVAL; |
51d59c6b | 3222 | vcpu->arch.pvclock_set_guest_stopped_request = true; |
1c0b28c2 EM |
3223 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
3224 | return 0; | |
3225 | } | |
3226 | ||
5c919412 AS |
3227 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
3228 | struct kvm_enable_cap *cap) | |
3229 | { | |
3230 | if (cap->flags) | |
3231 | return -EINVAL; | |
3232 | ||
3233 | switch (cap->cap) { | |
3234 | case KVM_CAP_HYPERV_SYNIC: | |
3235 | return kvm_hv_activate_synic(vcpu); | |
3236 | default: | |
3237 | return -EINVAL; | |
3238 | } | |
3239 | } | |
3240 | ||
313a3dc7 CO |
3241 | long kvm_arch_vcpu_ioctl(struct file *filp, |
3242 | unsigned int ioctl, unsigned long arg) | |
3243 | { | |
3244 | struct kvm_vcpu *vcpu = filp->private_data; | |
3245 | void __user *argp = (void __user *)arg; | |
3246 | int r; | |
d1ac91d8 AK |
3247 | union { |
3248 | struct kvm_lapic_state *lapic; | |
3249 | struct kvm_xsave *xsave; | |
3250 | struct kvm_xcrs *xcrs; | |
3251 | void *buffer; | |
3252 | } u; | |
3253 | ||
3254 | u.buffer = NULL; | |
313a3dc7 CO |
3255 | switch (ioctl) { |
3256 | case KVM_GET_LAPIC: { | |
2204ae3c | 3257 | r = -EINVAL; |
bce87cce | 3258 | if (!lapic_in_kernel(vcpu)) |
2204ae3c | 3259 | goto out; |
d1ac91d8 | 3260 | u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 3261 | |
b772ff36 | 3262 | r = -ENOMEM; |
d1ac91d8 | 3263 | if (!u.lapic) |
b772ff36 | 3264 | goto out; |
d1ac91d8 | 3265 | r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3266 | if (r) |
3267 | goto out; | |
3268 | r = -EFAULT; | |
d1ac91d8 | 3269 | if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
3270 | goto out; |
3271 | r = 0; | |
3272 | break; | |
3273 | } | |
3274 | case KVM_SET_LAPIC: { | |
2204ae3c | 3275 | r = -EINVAL; |
bce87cce | 3276 | if (!lapic_in_kernel(vcpu)) |
2204ae3c | 3277 | goto out; |
ff5c2c03 | 3278 | u.lapic = memdup_user(argp, sizeof(*u.lapic)); |
18595411 GC |
3279 | if (IS_ERR(u.lapic)) |
3280 | return PTR_ERR(u.lapic); | |
ff5c2c03 | 3281 | |
d1ac91d8 | 3282 | r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3283 | break; |
3284 | } | |
f77bc6a4 ZX |
3285 | case KVM_INTERRUPT: { |
3286 | struct kvm_interrupt irq; | |
3287 | ||
3288 | r = -EFAULT; | |
3289 | if (copy_from_user(&irq, argp, sizeof irq)) | |
3290 | goto out; | |
3291 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
f77bc6a4 ZX |
3292 | break; |
3293 | } | |
c4abb7c9 JK |
3294 | case KVM_NMI: { |
3295 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
c4abb7c9 JK |
3296 | break; |
3297 | } | |
f077825a PB |
3298 | case KVM_SMI: { |
3299 | r = kvm_vcpu_ioctl_smi(vcpu); | |
3300 | break; | |
3301 | } | |
313a3dc7 CO |
3302 | case KVM_SET_CPUID: { |
3303 | struct kvm_cpuid __user *cpuid_arg = argp; | |
3304 | struct kvm_cpuid cpuid; | |
3305 | ||
3306 | r = -EFAULT; | |
3307 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3308 | goto out; | |
3309 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
313a3dc7 CO |
3310 | break; |
3311 | } | |
07716717 DK |
3312 | case KVM_SET_CPUID2: { |
3313 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3314 | struct kvm_cpuid2 cpuid; | |
3315 | ||
3316 | r = -EFAULT; | |
3317 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3318 | goto out; | |
3319 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 3320 | cpuid_arg->entries); |
07716717 DK |
3321 | break; |
3322 | } | |
3323 | case KVM_GET_CPUID2: { | |
3324 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3325 | struct kvm_cpuid2 cpuid; | |
3326 | ||
3327 | r = -EFAULT; | |
3328 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3329 | goto out; | |
3330 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 3331 | cpuid_arg->entries); |
07716717 DK |
3332 | if (r) |
3333 | goto out; | |
3334 | r = -EFAULT; | |
3335 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
3336 | goto out; | |
3337 | r = 0; | |
3338 | break; | |
3339 | } | |
313a3dc7 | 3340 | case KVM_GET_MSRS: |
609e36d3 | 3341 | r = msr_io(vcpu, argp, do_get_msr, 1); |
313a3dc7 CO |
3342 | break; |
3343 | case KVM_SET_MSRS: | |
3344 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
3345 | break; | |
b209749f AK |
3346 | case KVM_TPR_ACCESS_REPORTING: { |
3347 | struct kvm_tpr_access_ctl tac; | |
3348 | ||
3349 | r = -EFAULT; | |
3350 | if (copy_from_user(&tac, argp, sizeof tac)) | |
3351 | goto out; | |
3352 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
3353 | if (r) | |
3354 | goto out; | |
3355 | r = -EFAULT; | |
3356 | if (copy_to_user(argp, &tac, sizeof tac)) | |
3357 | goto out; | |
3358 | r = 0; | |
3359 | break; | |
3360 | }; | |
b93463aa AK |
3361 | case KVM_SET_VAPIC_ADDR: { |
3362 | struct kvm_vapic_addr va; | |
3363 | ||
3364 | r = -EINVAL; | |
35754c98 | 3365 | if (!lapic_in_kernel(vcpu)) |
b93463aa AK |
3366 | goto out; |
3367 | r = -EFAULT; | |
3368 | if (copy_from_user(&va, argp, sizeof va)) | |
3369 | goto out; | |
fda4e2e8 | 3370 | r = kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); |
b93463aa AK |
3371 | break; |
3372 | } | |
890ca9ae HY |
3373 | case KVM_X86_SETUP_MCE: { |
3374 | u64 mcg_cap; | |
3375 | ||
3376 | r = -EFAULT; | |
3377 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
3378 | goto out; | |
3379 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
3380 | break; | |
3381 | } | |
3382 | case KVM_X86_SET_MCE: { | |
3383 | struct kvm_x86_mce mce; | |
3384 | ||
3385 | r = -EFAULT; | |
3386 | if (copy_from_user(&mce, argp, sizeof mce)) | |
3387 | goto out; | |
3388 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
3389 | break; | |
3390 | } | |
3cfc3092 JK |
3391 | case KVM_GET_VCPU_EVENTS: { |
3392 | struct kvm_vcpu_events events; | |
3393 | ||
3394 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
3395 | ||
3396 | r = -EFAULT; | |
3397 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
3398 | break; | |
3399 | r = 0; | |
3400 | break; | |
3401 | } | |
3402 | case KVM_SET_VCPU_EVENTS: { | |
3403 | struct kvm_vcpu_events events; | |
3404 | ||
3405 | r = -EFAULT; | |
3406 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
3407 | break; | |
3408 | ||
3409 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
3410 | break; | |
3411 | } | |
a1efbe77 JK |
3412 | case KVM_GET_DEBUGREGS: { |
3413 | struct kvm_debugregs dbgregs; | |
3414 | ||
3415 | kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs); | |
3416 | ||
3417 | r = -EFAULT; | |
3418 | if (copy_to_user(argp, &dbgregs, | |
3419 | sizeof(struct kvm_debugregs))) | |
3420 | break; | |
3421 | r = 0; | |
3422 | break; | |
3423 | } | |
3424 | case KVM_SET_DEBUGREGS: { | |
3425 | struct kvm_debugregs dbgregs; | |
3426 | ||
3427 | r = -EFAULT; | |
3428 | if (copy_from_user(&dbgregs, argp, | |
3429 | sizeof(struct kvm_debugregs))) | |
3430 | break; | |
3431 | ||
3432 | r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs); | |
3433 | break; | |
3434 | } | |
2d5b5a66 | 3435 | case KVM_GET_XSAVE: { |
d1ac91d8 | 3436 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 3437 | r = -ENOMEM; |
d1ac91d8 | 3438 | if (!u.xsave) |
2d5b5a66 SY |
3439 | break; |
3440 | ||
d1ac91d8 | 3441 | kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3442 | |
3443 | r = -EFAULT; | |
d1ac91d8 | 3444 | if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
3445 | break; |
3446 | r = 0; | |
3447 | break; | |
3448 | } | |
3449 | case KVM_SET_XSAVE: { | |
ff5c2c03 | 3450 | u.xsave = memdup_user(argp, sizeof(*u.xsave)); |
18595411 GC |
3451 | if (IS_ERR(u.xsave)) |
3452 | return PTR_ERR(u.xsave); | |
2d5b5a66 | 3453 | |
d1ac91d8 | 3454 | r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3455 | break; |
3456 | } | |
3457 | case KVM_GET_XCRS: { | |
d1ac91d8 | 3458 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 3459 | r = -ENOMEM; |
d1ac91d8 | 3460 | if (!u.xcrs) |
2d5b5a66 SY |
3461 | break; |
3462 | ||
d1ac91d8 | 3463 | kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3464 | |
3465 | r = -EFAULT; | |
d1ac91d8 | 3466 | if (copy_to_user(argp, u.xcrs, |
2d5b5a66 SY |
3467 | sizeof(struct kvm_xcrs))) |
3468 | break; | |
3469 | r = 0; | |
3470 | break; | |
3471 | } | |
3472 | case KVM_SET_XCRS: { | |
ff5c2c03 | 3473 | u.xcrs = memdup_user(argp, sizeof(*u.xcrs)); |
18595411 GC |
3474 | if (IS_ERR(u.xcrs)) |
3475 | return PTR_ERR(u.xcrs); | |
2d5b5a66 | 3476 | |
d1ac91d8 | 3477 | r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3478 | break; |
3479 | } | |
92a1f12d JR |
3480 | case KVM_SET_TSC_KHZ: { |
3481 | u32 user_tsc_khz; | |
3482 | ||
3483 | r = -EINVAL; | |
92a1f12d JR |
3484 | user_tsc_khz = (u32)arg; |
3485 | ||
3486 | if (user_tsc_khz >= kvm_max_guest_tsc_khz) | |
3487 | goto out; | |
3488 | ||
cc578287 ZA |
3489 | if (user_tsc_khz == 0) |
3490 | user_tsc_khz = tsc_khz; | |
3491 | ||
381d585c HZ |
3492 | if (!kvm_set_tsc_khz(vcpu, user_tsc_khz)) |
3493 | r = 0; | |
92a1f12d | 3494 | |
92a1f12d JR |
3495 | goto out; |
3496 | } | |
3497 | case KVM_GET_TSC_KHZ: { | |
cc578287 | 3498 | r = vcpu->arch.virtual_tsc_khz; |
92a1f12d JR |
3499 | goto out; |
3500 | } | |
1c0b28c2 EM |
3501 | case KVM_KVMCLOCK_CTRL: { |
3502 | r = kvm_set_guest_paused(vcpu); | |
3503 | goto out; | |
3504 | } | |
5c919412 AS |
3505 | case KVM_ENABLE_CAP: { |
3506 | struct kvm_enable_cap cap; | |
3507 | ||
3508 | r = -EFAULT; | |
3509 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
3510 | goto out; | |
3511 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
3512 | break; | |
3513 | } | |
313a3dc7 CO |
3514 | default: |
3515 | r = -EINVAL; | |
3516 | } | |
3517 | out: | |
d1ac91d8 | 3518 | kfree(u.buffer); |
313a3dc7 CO |
3519 | return r; |
3520 | } | |
3521 | ||
5b1c1493 CO |
3522 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
3523 | { | |
3524 | return VM_FAULT_SIGBUS; | |
3525 | } | |
3526 | ||
1fe779f8 CO |
3527 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
3528 | { | |
3529 | int ret; | |
3530 | ||
3531 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
951179ce | 3532 | return -EINVAL; |
1fe779f8 CO |
3533 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); |
3534 | return ret; | |
3535 | } | |
3536 | ||
b927a3ce SY |
3537 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
3538 | u64 ident_addr) | |
3539 | { | |
3540 | kvm->arch.ept_identity_map_addr = ident_addr; | |
3541 | return 0; | |
3542 | } | |
3543 | ||
1fe779f8 CO |
3544 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
3545 | u32 kvm_nr_mmu_pages) | |
3546 | { | |
3547 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
3548 | return -EINVAL; | |
3549 | ||
79fac95e | 3550 | mutex_lock(&kvm->slots_lock); |
1fe779f8 CO |
3551 | |
3552 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 3553 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 3554 | |
79fac95e | 3555 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
3556 | return 0; |
3557 | } | |
3558 | ||
3559 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
3560 | { | |
39de71ec | 3561 | return kvm->arch.n_max_mmu_pages; |
1fe779f8 CO |
3562 | } |
3563 | ||
1fe779f8 CO |
3564 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
3565 | { | |
3566 | int r; | |
3567 | ||
3568 | r = 0; | |
3569 | switch (chip->chip_id) { | |
3570 | case KVM_IRQCHIP_PIC_MASTER: | |
3571 | memcpy(&chip->chip.pic, | |
3572 | &pic_irqchip(kvm)->pics[0], | |
3573 | sizeof(struct kvm_pic_state)); | |
3574 | break; | |
3575 | case KVM_IRQCHIP_PIC_SLAVE: | |
3576 | memcpy(&chip->chip.pic, | |
3577 | &pic_irqchip(kvm)->pics[1], | |
3578 | sizeof(struct kvm_pic_state)); | |
3579 | break; | |
3580 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 3581 | r = kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3582 | break; |
3583 | default: | |
3584 | r = -EINVAL; | |
3585 | break; | |
3586 | } | |
3587 | return r; | |
3588 | } | |
3589 | ||
3590 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
3591 | { | |
3592 | int r; | |
3593 | ||
3594 | r = 0; | |
3595 | switch (chip->chip_id) { | |
3596 | case KVM_IRQCHIP_PIC_MASTER: | |
f4f51050 | 3597 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3598 | memcpy(&pic_irqchip(kvm)->pics[0], |
3599 | &chip->chip.pic, | |
3600 | sizeof(struct kvm_pic_state)); | |
f4f51050 | 3601 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3602 | break; |
3603 | case KVM_IRQCHIP_PIC_SLAVE: | |
f4f51050 | 3604 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3605 | memcpy(&pic_irqchip(kvm)->pics[1], |
3606 | &chip->chip.pic, | |
3607 | sizeof(struct kvm_pic_state)); | |
f4f51050 | 3608 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3609 | break; |
3610 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 3611 | r = kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3612 | break; |
3613 | default: | |
3614 | r = -EINVAL; | |
3615 | break; | |
3616 | } | |
3617 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
3618 | return r; | |
3619 | } | |
3620 | ||
e0f63cb9 SY |
3621 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
3622 | { | |
34f3941c RK |
3623 | struct kvm_kpit_state *kps = &kvm->arch.vpit->pit_state; |
3624 | ||
3625 | BUILD_BUG_ON(sizeof(*ps) != sizeof(kps->channels)); | |
3626 | ||
3627 | mutex_lock(&kps->lock); | |
3628 | memcpy(ps, &kps->channels, sizeof(*ps)); | |
3629 | mutex_unlock(&kps->lock); | |
2da29bcc | 3630 | return 0; |
e0f63cb9 SY |
3631 | } |
3632 | ||
3633 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
3634 | { | |
0185604c | 3635 | int i; |
09edea72 RK |
3636 | struct kvm_pit *pit = kvm->arch.vpit; |
3637 | ||
3638 | mutex_lock(&pit->pit_state.lock); | |
34f3941c | 3639 | memcpy(&pit->pit_state.channels, ps, sizeof(*ps)); |
0185604c | 3640 | for (i = 0; i < 3; i++) |
09edea72 RK |
3641 | kvm_pit_load_count(pit, i, ps->channels[i].count, 0); |
3642 | mutex_unlock(&pit->pit_state.lock); | |
2da29bcc | 3643 | return 0; |
e9f42757 BK |
3644 | } |
3645 | ||
3646 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3647 | { | |
e9f42757 BK |
3648 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
3649 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
3650 | sizeof(ps->channels)); | |
3651 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
3652 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
97e69aa6 | 3653 | memset(&ps->reserved, 0, sizeof(ps->reserved)); |
2da29bcc | 3654 | return 0; |
e9f42757 BK |
3655 | } |
3656 | ||
3657 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3658 | { | |
2da29bcc | 3659 | int start = 0; |
0185604c | 3660 | int i; |
e9f42757 | 3661 | u32 prev_legacy, cur_legacy; |
09edea72 RK |
3662 | struct kvm_pit *pit = kvm->arch.vpit; |
3663 | ||
3664 | mutex_lock(&pit->pit_state.lock); | |
3665 | prev_legacy = pit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
e9f42757 BK |
3666 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; |
3667 | if (!prev_legacy && cur_legacy) | |
3668 | start = 1; | |
09edea72 RK |
3669 | memcpy(&pit->pit_state.channels, &ps->channels, |
3670 | sizeof(pit->pit_state.channels)); | |
3671 | pit->pit_state.flags = ps->flags; | |
0185604c | 3672 | for (i = 0; i < 3; i++) |
09edea72 | 3673 | kvm_pit_load_count(pit, i, pit->pit_state.channels[i].count, |
e5e57e7a | 3674 | start && i == 0); |
09edea72 | 3675 | mutex_unlock(&pit->pit_state.lock); |
2da29bcc | 3676 | return 0; |
e0f63cb9 SY |
3677 | } |
3678 | ||
52d939a0 MT |
3679 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
3680 | struct kvm_reinject_control *control) | |
3681 | { | |
71474e2f RK |
3682 | struct kvm_pit *pit = kvm->arch.vpit; |
3683 | ||
3684 | if (!pit) | |
52d939a0 | 3685 | return -ENXIO; |
b39c90b6 | 3686 | |
71474e2f RK |
3687 | /* pit->pit_state.lock was overloaded to prevent userspace from getting |
3688 | * an inconsistent state after running multiple KVM_REINJECT_CONTROL | |
3689 | * ioctls in parallel. Use a separate lock if that ioctl isn't rare. | |
3690 | */ | |
3691 | mutex_lock(&pit->pit_state.lock); | |
3692 | kvm_pit_set_reinject(pit, control->pit_reinject); | |
3693 | mutex_unlock(&pit->pit_state.lock); | |
b39c90b6 | 3694 | |
52d939a0 MT |
3695 | return 0; |
3696 | } | |
3697 | ||
95d4c16c | 3698 | /** |
60c34612 TY |
3699 | * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot |
3700 | * @kvm: kvm instance | |
3701 | * @log: slot id and address to which we copy the log | |
95d4c16c | 3702 | * |
e108ff2f PB |
3703 | * Steps 1-4 below provide general overview of dirty page logging. See |
3704 | * kvm_get_dirty_log_protect() function description for additional details. | |
3705 | * | |
3706 | * We call kvm_get_dirty_log_protect() to handle steps 1-3, upon return we | |
3707 | * always flush the TLB (step 4) even if previous step failed and the dirty | |
3708 | * bitmap may be corrupt. Regardless of previous outcome the KVM logging API | |
3709 | * does not preclude user space subsequent dirty log read. Flushing TLB ensures | |
3710 | * writes will be marked dirty for next log read. | |
95d4c16c | 3711 | * |
60c34612 TY |
3712 | * 1. Take a snapshot of the bit and clear it if needed. |
3713 | * 2. Write protect the corresponding page. | |
e108ff2f PB |
3714 | * 3. Copy the snapshot to the userspace. |
3715 | * 4. Flush TLB's if needed. | |
5bb064dc | 3716 | */ |
60c34612 | 3717 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
5bb064dc | 3718 | { |
60c34612 | 3719 | bool is_dirty = false; |
e108ff2f | 3720 | int r; |
5bb064dc | 3721 | |
79fac95e | 3722 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 3723 | |
88178fd4 KH |
3724 | /* |
3725 | * Flush potentially hardware-cached dirty pages to dirty_bitmap. | |
3726 | */ | |
3727 | if (kvm_x86_ops->flush_log_dirty) | |
3728 | kvm_x86_ops->flush_log_dirty(kvm); | |
3729 | ||
e108ff2f | 3730 | r = kvm_get_dirty_log_protect(kvm, log, &is_dirty); |
198c74f4 XG |
3731 | |
3732 | /* | |
3733 | * All the TLBs can be flushed out of mmu lock, see the comments in | |
3734 | * kvm_mmu_slot_remove_write_access(). | |
3735 | */ | |
e108ff2f | 3736 | lockdep_assert_held(&kvm->slots_lock); |
198c74f4 XG |
3737 | if (is_dirty) |
3738 | kvm_flush_remote_tlbs(kvm); | |
3739 | ||
79fac95e | 3740 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
3741 | return r; |
3742 | } | |
3743 | ||
aa2fbe6d YZ |
3744 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, |
3745 | bool line_status) | |
23d43cf9 CD |
3746 | { |
3747 | if (!irqchip_in_kernel(kvm)) | |
3748 | return -ENXIO; | |
3749 | ||
3750 | irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, | |
aa2fbe6d YZ |
3751 | irq_event->irq, irq_event->level, |
3752 | line_status); | |
23d43cf9 CD |
3753 | return 0; |
3754 | } | |
3755 | ||
90de4a18 NA |
3756 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, |
3757 | struct kvm_enable_cap *cap) | |
3758 | { | |
3759 | int r; | |
3760 | ||
3761 | if (cap->flags) | |
3762 | return -EINVAL; | |
3763 | ||
3764 | switch (cap->cap) { | |
3765 | case KVM_CAP_DISABLE_QUIRKS: | |
3766 | kvm->arch.disabled_quirks = cap->args[0]; | |
3767 | r = 0; | |
3768 | break; | |
49df6397 SR |
3769 | case KVM_CAP_SPLIT_IRQCHIP: { |
3770 | mutex_lock(&kvm->lock); | |
b053b2ae SR |
3771 | r = -EINVAL; |
3772 | if (cap->args[0] > MAX_NR_RESERVED_IOAPIC_PINS) | |
3773 | goto split_irqchip_unlock; | |
49df6397 SR |
3774 | r = -EEXIST; |
3775 | if (irqchip_in_kernel(kvm)) | |
3776 | goto split_irqchip_unlock; | |
3777 | if (atomic_read(&kvm->online_vcpus)) | |
3778 | goto split_irqchip_unlock; | |
3779 | r = kvm_setup_empty_irq_routing(kvm); | |
3780 | if (r) | |
3781 | goto split_irqchip_unlock; | |
3782 | /* Pairs with irqchip_in_kernel. */ | |
3783 | smp_wmb(); | |
3784 | kvm->arch.irqchip_split = true; | |
b053b2ae | 3785 | kvm->arch.nr_reserved_ioapic_pins = cap->args[0]; |
49df6397 SR |
3786 | r = 0; |
3787 | split_irqchip_unlock: | |
3788 | mutex_unlock(&kvm->lock); | |
3789 | break; | |
3790 | } | |
90de4a18 NA |
3791 | default: |
3792 | r = -EINVAL; | |
3793 | break; | |
3794 | } | |
3795 | return r; | |
3796 | } | |
3797 | ||
1fe779f8 CO |
3798 | long kvm_arch_vm_ioctl(struct file *filp, |
3799 | unsigned int ioctl, unsigned long arg) | |
3800 | { | |
3801 | struct kvm *kvm = filp->private_data; | |
3802 | void __user *argp = (void __user *)arg; | |
367e1319 | 3803 | int r = -ENOTTY; |
f0d66275 DH |
3804 | /* |
3805 | * This union makes it completely explicit to gcc-3.x | |
3806 | * that these two variables' stack usage should be | |
3807 | * combined, not added together. | |
3808 | */ | |
3809 | union { | |
3810 | struct kvm_pit_state ps; | |
e9f42757 | 3811 | struct kvm_pit_state2 ps2; |
c5ff41ce | 3812 | struct kvm_pit_config pit_config; |
f0d66275 | 3813 | } u; |
1fe779f8 CO |
3814 | |
3815 | switch (ioctl) { | |
3816 | case KVM_SET_TSS_ADDR: | |
3817 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
1fe779f8 | 3818 | break; |
b927a3ce SY |
3819 | case KVM_SET_IDENTITY_MAP_ADDR: { |
3820 | u64 ident_addr; | |
3821 | ||
3822 | r = -EFAULT; | |
3823 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
3824 | goto out; | |
3825 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); | |
b927a3ce SY |
3826 | break; |
3827 | } | |
1fe779f8 CO |
3828 | case KVM_SET_NR_MMU_PAGES: |
3829 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
1fe779f8 CO |
3830 | break; |
3831 | case KVM_GET_NR_MMU_PAGES: | |
3832 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
3833 | break; | |
3ddea128 MT |
3834 | case KVM_CREATE_IRQCHIP: { |
3835 | struct kvm_pic *vpic; | |
3836 | ||
3837 | mutex_lock(&kvm->lock); | |
3838 | r = -EEXIST; | |
3839 | if (kvm->arch.vpic) | |
3840 | goto create_irqchip_unlock; | |
3e515705 AK |
3841 | r = -EINVAL; |
3842 | if (atomic_read(&kvm->online_vcpus)) | |
3843 | goto create_irqchip_unlock; | |
1fe779f8 | 3844 | r = -ENOMEM; |
3ddea128 MT |
3845 | vpic = kvm_create_pic(kvm); |
3846 | if (vpic) { | |
1fe779f8 CO |
3847 | r = kvm_ioapic_init(kvm); |
3848 | if (r) { | |
175504cd | 3849 | mutex_lock(&kvm->slots_lock); |
71ba994c | 3850 | kvm_destroy_pic(vpic); |
175504cd | 3851 | mutex_unlock(&kvm->slots_lock); |
3ddea128 | 3852 | goto create_irqchip_unlock; |
1fe779f8 CO |
3853 | } |
3854 | } else | |
3ddea128 | 3855 | goto create_irqchip_unlock; |
399ec807 AK |
3856 | r = kvm_setup_default_irq_routing(kvm); |
3857 | if (r) { | |
175504cd | 3858 | mutex_lock(&kvm->slots_lock); |
3ddea128 | 3859 | mutex_lock(&kvm->irq_lock); |
72bb2fcd | 3860 | kvm_ioapic_destroy(kvm); |
71ba994c | 3861 | kvm_destroy_pic(vpic); |
3ddea128 | 3862 | mutex_unlock(&kvm->irq_lock); |
175504cd | 3863 | mutex_unlock(&kvm->slots_lock); |
71ba994c | 3864 | goto create_irqchip_unlock; |
399ec807 | 3865 | } |
71ba994c PB |
3866 | /* Write kvm->irq_routing before kvm->arch.vpic. */ |
3867 | smp_wmb(); | |
3868 | kvm->arch.vpic = vpic; | |
3ddea128 MT |
3869 | create_irqchip_unlock: |
3870 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 3871 | break; |
3ddea128 | 3872 | } |
7837699f | 3873 | case KVM_CREATE_PIT: |
c5ff41ce JK |
3874 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
3875 | goto create_pit; | |
3876 | case KVM_CREATE_PIT2: | |
3877 | r = -EFAULT; | |
3878 | if (copy_from_user(&u.pit_config, argp, | |
3879 | sizeof(struct kvm_pit_config))) | |
3880 | goto out; | |
3881 | create_pit: | |
79fac95e | 3882 | mutex_lock(&kvm->slots_lock); |
269e05e4 AK |
3883 | r = -EEXIST; |
3884 | if (kvm->arch.vpit) | |
3885 | goto create_pit_unlock; | |
7837699f | 3886 | r = -ENOMEM; |
c5ff41ce | 3887 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
3888 | if (kvm->arch.vpit) |
3889 | r = 0; | |
269e05e4 | 3890 | create_pit_unlock: |
79fac95e | 3891 | mutex_unlock(&kvm->slots_lock); |
7837699f | 3892 | break; |
1fe779f8 CO |
3893 | case KVM_GET_IRQCHIP: { |
3894 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 3895 | struct kvm_irqchip *chip; |
1fe779f8 | 3896 | |
ff5c2c03 SL |
3897 | chip = memdup_user(argp, sizeof(*chip)); |
3898 | if (IS_ERR(chip)) { | |
3899 | r = PTR_ERR(chip); | |
1fe779f8 | 3900 | goto out; |
ff5c2c03 SL |
3901 | } |
3902 | ||
1fe779f8 | 3903 | r = -ENXIO; |
49df6397 | 3904 | if (!irqchip_in_kernel(kvm) || irqchip_split(kvm)) |
f0d66275 DH |
3905 | goto get_irqchip_out; |
3906 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 3907 | if (r) |
f0d66275 | 3908 | goto get_irqchip_out; |
1fe779f8 | 3909 | r = -EFAULT; |
f0d66275 DH |
3910 | if (copy_to_user(argp, chip, sizeof *chip)) |
3911 | goto get_irqchip_out; | |
1fe779f8 | 3912 | r = 0; |
f0d66275 DH |
3913 | get_irqchip_out: |
3914 | kfree(chip); | |
1fe779f8 CO |
3915 | break; |
3916 | } | |
3917 | case KVM_SET_IRQCHIP: { | |
3918 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 3919 | struct kvm_irqchip *chip; |
1fe779f8 | 3920 | |
ff5c2c03 SL |
3921 | chip = memdup_user(argp, sizeof(*chip)); |
3922 | if (IS_ERR(chip)) { | |
3923 | r = PTR_ERR(chip); | |
1fe779f8 | 3924 | goto out; |
ff5c2c03 SL |
3925 | } |
3926 | ||
1fe779f8 | 3927 | r = -ENXIO; |
49df6397 | 3928 | if (!irqchip_in_kernel(kvm) || irqchip_split(kvm)) |
f0d66275 DH |
3929 | goto set_irqchip_out; |
3930 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 3931 | if (r) |
f0d66275 | 3932 | goto set_irqchip_out; |
1fe779f8 | 3933 | r = 0; |
f0d66275 DH |
3934 | set_irqchip_out: |
3935 | kfree(chip); | |
1fe779f8 CO |
3936 | break; |
3937 | } | |
e0f63cb9 | 3938 | case KVM_GET_PIT: { |
e0f63cb9 | 3939 | r = -EFAULT; |
f0d66275 | 3940 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3941 | goto out; |
3942 | r = -ENXIO; | |
3943 | if (!kvm->arch.vpit) | |
3944 | goto out; | |
f0d66275 | 3945 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
3946 | if (r) |
3947 | goto out; | |
3948 | r = -EFAULT; | |
f0d66275 | 3949 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3950 | goto out; |
3951 | r = 0; | |
3952 | break; | |
3953 | } | |
3954 | case KVM_SET_PIT: { | |
e0f63cb9 | 3955 | r = -EFAULT; |
f0d66275 | 3956 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
3957 | goto out; |
3958 | r = -ENXIO; | |
3959 | if (!kvm->arch.vpit) | |
3960 | goto out; | |
f0d66275 | 3961 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
3962 | break; |
3963 | } | |
e9f42757 BK |
3964 | case KVM_GET_PIT2: { |
3965 | r = -ENXIO; | |
3966 | if (!kvm->arch.vpit) | |
3967 | goto out; | |
3968 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
3969 | if (r) | |
3970 | goto out; | |
3971 | r = -EFAULT; | |
3972 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
3973 | goto out; | |
3974 | r = 0; | |
3975 | break; | |
3976 | } | |
3977 | case KVM_SET_PIT2: { | |
3978 | r = -EFAULT; | |
3979 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
3980 | goto out; | |
3981 | r = -ENXIO; | |
3982 | if (!kvm->arch.vpit) | |
3983 | goto out; | |
3984 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
e9f42757 BK |
3985 | break; |
3986 | } | |
52d939a0 MT |
3987 | case KVM_REINJECT_CONTROL: { |
3988 | struct kvm_reinject_control control; | |
3989 | r = -EFAULT; | |
3990 | if (copy_from_user(&control, argp, sizeof(control))) | |
3991 | goto out; | |
3992 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
52d939a0 MT |
3993 | break; |
3994 | } | |
d71ba788 PB |
3995 | case KVM_SET_BOOT_CPU_ID: |
3996 | r = 0; | |
3997 | mutex_lock(&kvm->lock); | |
3998 | if (atomic_read(&kvm->online_vcpus) != 0) | |
3999 | r = -EBUSY; | |
4000 | else | |
4001 | kvm->arch.bsp_vcpu_id = arg; | |
4002 | mutex_unlock(&kvm->lock); | |
4003 | break; | |
ffde22ac ES |
4004 | case KVM_XEN_HVM_CONFIG: { |
4005 | r = -EFAULT; | |
4006 | if (copy_from_user(&kvm->arch.xen_hvm_config, argp, | |
4007 | sizeof(struct kvm_xen_hvm_config))) | |
4008 | goto out; | |
4009 | r = -EINVAL; | |
4010 | if (kvm->arch.xen_hvm_config.flags) | |
4011 | goto out; | |
4012 | r = 0; | |
4013 | break; | |
4014 | } | |
afbcf7ab | 4015 | case KVM_SET_CLOCK: { |
afbcf7ab GC |
4016 | struct kvm_clock_data user_ns; |
4017 | u64 now_ns; | |
4018 | s64 delta; | |
4019 | ||
4020 | r = -EFAULT; | |
4021 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
4022 | goto out; | |
4023 | ||
4024 | r = -EINVAL; | |
4025 | if (user_ns.flags) | |
4026 | goto out; | |
4027 | ||
4028 | r = 0; | |
395c6b0a | 4029 | local_irq_disable(); |
759379dd | 4030 | now_ns = get_kernel_ns(); |
afbcf7ab | 4031 | delta = user_ns.clock - now_ns; |
395c6b0a | 4032 | local_irq_enable(); |
afbcf7ab | 4033 | kvm->arch.kvmclock_offset = delta; |
2e762ff7 | 4034 | kvm_gen_update_masterclock(kvm); |
afbcf7ab GC |
4035 | break; |
4036 | } | |
4037 | case KVM_GET_CLOCK: { | |
afbcf7ab GC |
4038 | struct kvm_clock_data user_ns; |
4039 | u64 now_ns; | |
4040 | ||
395c6b0a | 4041 | local_irq_disable(); |
759379dd | 4042 | now_ns = get_kernel_ns(); |
afbcf7ab | 4043 | user_ns.clock = kvm->arch.kvmclock_offset + now_ns; |
395c6b0a | 4044 | local_irq_enable(); |
afbcf7ab | 4045 | user_ns.flags = 0; |
97e69aa6 | 4046 | memset(&user_ns.pad, 0, sizeof(user_ns.pad)); |
afbcf7ab GC |
4047 | |
4048 | r = -EFAULT; | |
4049 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
4050 | goto out; | |
4051 | r = 0; | |
4052 | break; | |
4053 | } | |
90de4a18 NA |
4054 | case KVM_ENABLE_CAP: { |
4055 | struct kvm_enable_cap cap; | |
afbcf7ab | 4056 | |
90de4a18 NA |
4057 | r = -EFAULT; |
4058 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
4059 | goto out; | |
4060 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
4061 | break; | |
4062 | } | |
1fe779f8 | 4063 | default: |
c274e03a | 4064 | r = kvm_vm_ioctl_assigned_device(kvm, ioctl, arg); |
1fe779f8 CO |
4065 | } |
4066 | out: | |
4067 | return r; | |
4068 | } | |
4069 | ||
a16b043c | 4070 | static void kvm_init_msr_list(void) |
043405e1 CO |
4071 | { |
4072 | u32 dummy[2]; | |
4073 | unsigned i, j; | |
4074 | ||
62ef68bb | 4075 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { |
043405e1 CO |
4076 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
4077 | continue; | |
93c4adc7 PB |
4078 | |
4079 | /* | |
4080 | * Even MSRs that are valid in the host may not be exposed | |
9dbe6cf9 | 4081 | * to the guests in some cases. |
93c4adc7 PB |
4082 | */ |
4083 | switch (msrs_to_save[i]) { | |
4084 | case MSR_IA32_BNDCFGS: | |
4085 | if (!kvm_x86_ops->mpx_supported()) | |
4086 | continue; | |
4087 | break; | |
9dbe6cf9 PB |
4088 | case MSR_TSC_AUX: |
4089 | if (!kvm_x86_ops->rdtscp_supported()) | |
4090 | continue; | |
4091 | break; | |
93c4adc7 PB |
4092 | default: |
4093 | break; | |
4094 | } | |
4095 | ||
043405e1 CO |
4096 | if (j < i) |
4097 | msrs_to_save[j] = msrs_to_save[i]; | |
4098 | j++; | |
4099 | } | |
4100 | num_msrs_to_save = j; | |
62ef68bb PB |
4101 | |
4102 | for (i = j = 0; i < ARRAY_SIZE(emulated_msrs); i++) { | |
4103 | switch (emulated_msrs[i]) { | |
6d396b55 PB |
4104 | case MSR_IA32_SMBASE: |
4105 | if (!kvm_x86_ops->cpu_has_high_real_mode_segbase()) | |
4106 | continue; | |
4107 | break; | |
62ef68bb PB |
4108 | default: |
4109 | break; | |
4110 | } | |
4111 | ||
4112 | if (j < i) | |
4113 | emulated_msrs[j] = emulated_msrs[i]; | |
4114 | j++; | |
4115 | } | |
4116 | num_emulated_msrs = j; | |
043405e1 CO |
4117 | } |
4118 | ||
bda9020e MT |
4119 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
4120 | const void *v) | |
bbd9b64e | 4121 | { |
70252a10 AK |
4122 | int handled = 0; |
4123 | int n; | |
4124 | ||
4125 | do { | |
4126 | n = min(len, 8); | |
bce87cce | 4127 | if (!(lapic_in_kernel(vcpu) && |
e32edf4f NN |
4128 | !kvm_iodevice_write(vcpu, &vcpu->arch.apic->dev, addr, n, v)) |
4129 | && kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, n, v)) | |
70252a10 AK |
4130 | break; |
4131 | handled += n; | |
4132 | addr += n; | |
4133 | len -= n; | |
4134 | v += n; | |
4135 | } while (len); | |
bbd9b64e | 4136 | |
70252a10 | 4137 | return handled; |
bbd9b64e CO |
4138 | } |
4139 | ||
bda9020e | 4140 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 4141 | { |
70252a10 AK |
4142 | int handled = 0; |
4143 | int n; | |
4144 | ||
4145 | do { | |
4146 | n = min(len, 8); | |
bce87cce | 4147 | if (!(lapic_in_kernel(vcpu) && |
e32edf4f NN |
4148 | !kvm_iodevice_read(vcpu, &vcpu->arch.apic->dev, |
4149 | addr, n, v)) | |
4150 | && kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, n, v)) | |
70252a10 AK |
4151 | break; |
4152 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, *(u64 *)v); | |
4153 | handled += n; | |
4154 | addr += n; | |
4155 | len -= n; | |
4156 | v += n; | |
4157 | } while (len); | |
bbd9b64e | 4158 | |
70252a10 | 4159 | return handled; |
bbd9b64e CO |
4160 | } |
4161 | ||
2dafc6c2 GN |
4162 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
4163 | struct kvm_segment *var, int seg) | |
4164 | { | |
4165 | kvm_x86_ops->set_segment(vcpu, var, seg); | |
4166 | } | |
4167 | ||
4168 | void kvm_get_segment(struct kvm_vcpu *vcpu, | |
4169 | struct kvm_segment *var, int seg) | |
4170 | { | |
4171 | kvm_x86_ops->get_segment(vcpu, var, seg); | |
4172 | } | |
4173 | ||
54987b7a PB |
4174 | gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, |
4175 | struct x86_exception *exception) | |
02f59dc9 JR |
4176 | { |
4177 | gpa_t t_gpa; | |
02f59dc9 JR |
4178 | |
4179 | BUG_ON(!mmu_is_nested(vcpu)); | |
4180 | ||
4181 | /* NPT walks are always user-walks */ | |
4182 | access |= PFERR_USER_MASK; | |
54987b7a | 4183 | t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, exception); |
02f59dc9 JR |
4184 | |
4185 | return t_gpa; | |
4186 | } | |
4187 | ||
ab9ae313 AK |
4188 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, |
4189 | struct x86_exception *exception) | |
1871c602 GN |
4190 | { |
4191 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
ab9ae313 | 4192 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4193 | } |
4194 | ||
ab9ae313 AK |
4195 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, |
4196 | struct x86_exception *exception) | |
1871c602 GN |
4197 | { |
4198 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
4199 | access |= PFERR_FETCH_MASK; | |
ab9ae313 | 4200 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4201 | } |
4202 | ||
ab9ae313 AK |
4203 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, |
4204 | struct x86_exception *exception) | |
1871c602 GN |
4205 | { |
4206 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
4207 | access |= PFERR_WRITE_MASK; | |
ab9ae313 | 4208 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4209 | } |
4210 | ||
4211 | /* uses this to access any guest's mapped memory without checking CPL */ | |
ab9ae313 AK |
4212 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, |
4213 | struct x86_exception *exception) | |
1871c602 | 4214 | { |
ab9ae313 | 4215 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception); |
1871c602 GN |
4216 | } |
4217 | ||
4218 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
4219 | struct kvm_vcpu *vcpu, u32 access, | |
bcc55cba | 4220 | struct x86_exception *exception) |
bbd9b64e CO |
4221 | { |
4222 | void *data = val; | |
10589a46 | 4223 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
4224 | |
4225 | while (bytes) { | |
14dfe855 | 4226 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access, |
ab9ae313 | 4227 | exception); |
bbd9b64e | 4228 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 4229 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
4230 | int ret; |
4231 | ||
bcc55cba | 4232 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4233 | return X86EMUL_PROPAGATE_FAULT; |
54bf36aa PB |
4234 | ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, data, |
4235 | offset, toread); | |
10589a46 | 4236 | if (ret < 0) { |
c3cd7ffa | 4237 | r = X86EMUL_IO_NEEDED; |
10589a46 MT |
4238 | goto out; |
4239 | } | |
bbd9b64e | 4240 | |
77c2002e IE |
4241 | bytes -= toread; |
4242 | data += toread; | |
4243 | addr += toread; | |
bbd9b64e | 4244 | } |
10589a46 | 4245 | out: |
10589a46 | 4246 | return r; |
bbd9b64e | 4247 | } |
77c2002e | 4248 | |
1871c602 | 4249 | /* used for instruction fetching */ |
0f65dd70 AK |
4250 | static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt, |
4251 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4252 | struct x86_exception *exception) |
1871c602 | 4253 | { |
0f65dd70 | 4254 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4255 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
44583cba PB |
4256 | unsigned offset; |
4257 | int ret; | |
0f65dd70 | 4258 | |
44583cba PB |
4259 | /* Inline kvm_read_guest_virt_helper for speed. */ |
4260 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access|PFERR_FETCH_MASK, | |
4261 | exception); | |
4262 | if (unlikely(gpa == UNMAPPED_GVA)) | |
4263 | return X86EMUL_PROPAGATE_FAULT; | |
4264 | ||
4265 | offset = addr & (PAGE_SIZE-1); | |
4266 | if (WARN_ON(offset + bytes > PAGE_SIZE)) | |
4267 | bytes = (unsigned)PAGE_SIZE - offset; | |
54bf36aa PB |
4268 | ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, val, |
4269 | offset, bytes); | |
44583cba PB |
4270 | if (unlikely(ret < 0)) |
4271 | return X86EMUL_IO_NEEDED; | |
4272 | ||
4273 | return X86EMUL_CONTINUE; | |
1871c602 GN |
4274 | } |
4275 | ||
064aea77 | 4276 | int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4277 | gva_t addr, void *val, unsigned int bytes, |
bcc55cba | 4278 | struct x86_exception *exception) |
1871c602 | 4279 | { |
0f65dd70 | 4280 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4281 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
0f65dd70 | 4282 | |
1871c602 | 4283 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, |
bcc55cba | 4284 | exception); |
1871c602 | 4285 | } |
064aea77 | 4286 | EXPORT_SYMBOL_GPL(kvm_read_guest_virt); |
1871c602 | 4287 | |
0f65dd70 AK |
4288 | static int kvm_read_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
4289 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4290 | struct x86_exception *exception) |
1871c602 | 4291 | { |
0f65dd70 | 4292 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
bcc55cba | 4293 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception); |
1871c602 GN |
4294 | } |
4295 | ||
7a036a6f RK |
4296 | static int kvm_read_guest_phys_system(struct x86_emulate_ctxt *ctxt, |
4297 | unsigned long addr, void *val, unsigned int bytes) | |
4298 | { | |
4299 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4300 | int r = kvm_vcpu_read_guest(vcpu, addr, val, bytes); | |
4301 | ||
4302 | return r < 0 ? X86EMUL_IO_NEEDED : X86EMUL_CONTINUE; | |
4303 | } | |
4304 | ||
6a4d7550 | 4305 | int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4306 | gva_t addr, void *val, |
2dafc6c2 | 4307 | unsigned int bytes, |
bcc55cba | 4308 | struct x86_exception *exception) |
77c2002e | 4309 | { |
0f65dd70 | 4310 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
77c2002e IE |
4311 | void *data = val; |
4312 | int r = X86EMUL_CONTINUE; | |
4313 | ||
4314 | while (bytes) { | |
14dfe855 JR |
4315 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, |
4316 | PFERR_WRITE_MASK, | |
ab9ae313 | 4317 | exception); |
77c2002e IE |
4318 | unsigned offset = addr & (PAGE_SIZE-1); |
4319 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
4320 | int ret; | |
4321 | ||
bcc55cba | 4322 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4323 | return X86EMUL_PROPAGATE_FAULT; |
54bf36aa | 4324 | ret = kvm_vcpu_write_guest(vcpu, gpa, data, towrite); |
77c2002e | 4325 | if (ret < 0) { |
c3cd7ffa | 4326 | r = X86EMUL_IO_NEEDED; |
77c2002e IE |
4327 | goto out; |
4328 | } | |
4329 | ||
4330 | bytes -= towrite; | |
4331 | data += towrite; | |
4332 | addr += towrite; | |
4333 | } | |
4334 | out: | |
4335 | return r; | |
4336 | } | |
6a4d7550 | 4337 | EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system); |
77c2002e | 4338 | |
af7cc7d1 XG |
4339 | static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva, |
4340 | gpa_t *gpa, struct x86_exception *exception, | |
4341 | bool write) | |
4342 | { | |
97d64b78 AK |
4343 | u32 access = ((kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0) |
4344 | | (write ? PFERR_WRITE_MASK : 0); | |
af7cc7d1 | 4345 | |
be94f6b7 HH |
4346 | /* |
4347 | * currently PKRU is only applied to ept enabled guest so | |
4348 | * there is no pkey in EPT page table for L1 guest or EPT | |
4349 | * shadow page table for L2 guest. | |
4350 | */ | |
97d64b78 | 4351 | if (vcpu_match_mmio_gva(vcpu, gva) |
97ec8c06 | 4352 | && !permission_fault(vcpu, vcpu->arch.walk_mmu, |
be94f6b7 | 4353 | vcpu->arch.access, 0, access)) { |
bebb106a XG |
4354 | *gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT | |
4355 | (gva & (PAGE_SIZE - 1)); | |
4f022648 | 4356 | trace_vcpu_match_mmio(gva, *gpa, write, false); |
bebb106a XG |
4357 | return 1; |
4358 | } | |
4359 | ||
af7cc7d1 XG |
4360 | *gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
4361 | ||
4362 | if (*gpa == UNMAPPED_GVA) | |
4363 | return -1; | |
4364 | ||
4365 | /* For APIC access vmexit */ | |
4366 | if ((*gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4367 | return 1; | |
4368 | ||
4f022648 XG |
4369 | if (vcpu_match_mmio_gpa(vcpu, *gpa)) { |
4370 | trace_vcpu_match_mmio(gva, *gpa, write, true); | |
bebb106a | 4371 | return 1; |
4f022648 | 4372 | } |
bebb106a | 4373 | |
af7cc7d1 XG |
4374 | return 0; |
4375 | } | |
4376 | ||
3200f405 | 4377 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
bcc55cba | 4378 | const void *val, int bytes) |
bbd9b64e CO |
4379 | { |
4380 | int ret; | |
4381 | ||
54bf36aa | 4382 | ret = kvm_vcpu_write_guest(vcpu, gpa, val, bytes); |
9f811285 | 4383 | if (ret < 0) |
bbd9b64e | 4384 | return 0; |
0eb05bf2 | 4385 | kvm_page_track_write(vcpu, gpa, val, bytes); |
bbd9b64e CO |
4386 | return 1; |
4387 | } | |
4388 | ||
77d197b2 XG |
4389 | struct read_write_emulator_ops { |
4390 | int (*read_write_prepare)(struct kvm_vcpu *vcpu, void *val, | |
4391 | int bytes); | |
4392 | int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4393 | void *val, int bytes); | |
4394 | int (*read_write_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4395 | int bytes, void *val); | |
4396 | int (*read_write_exit_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4397 | void *val, int bytes); | |
4398 | bool write; | |
4399 | }; | |
4400 | ||
4401 | static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes) | |
4402 | { | |
4403 | if (vcpu->mmio_read_completed) { | |
77d197b2 | 4404 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
f78146b0 | 4405 | vcpu->mmio_fragments[0].gpa, *(u64 *)val); |
77d197b2 XG |
4406 | vcpu->mmio_read_completed = 0; |
4407 | return 1; | |
4408 | } | |
4409 | ||
4410 | return 0; | |
4411 | } | |
4412 | ||
4413 | static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4414 | void *val, int bytes) | |
4415 | { | |
54bf36aa | 4416 | return !kvm_vcpu_read_guest(vcpu, gpa, val, bytes); |
77d197b2 XG |
4417 | } |
4418 | ||
4419 | static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4420 | void *val, int bytes) | |
4421 | { | |
4422 | return emulator_write_phys(vcpu, gpa, val, bytes); | |
4423 | } | |
4424 | ||
4425 | static int write_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val) | |
4426 | { | |
4427 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); | |
4428 | return vcpu_mmio_write(vcpu, gpa, bytes, val); | |
4429 | } | |
4430 | ||
4431 | static int read_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4432 | void *val, int bytes) | |
4433 | { | |
4434 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
4435 | return X86EMUL_IO_NEEDED; | |
4436 | } | |
4437 | ||
4438 | static int write_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4439 | void *val, int bytes) | |
4440 | { | |
f78146b0 AK |
4441 | struct kvm_mmio_fragment *frag = &vcpu->mmio_fragments[0]; |
4442 | ||
87da7e66 | 4443 | memcpy(vcpu->run->mmio.data, frag->data, min(8u, frag->len)); |
77d197b2 XG |
4444 | return X86EMUL_CONTINUE; |
4445 | } | |
4446 | ||
0fbe9b0b | 4447 | static const struct read_write_emulator_ops read_emultor = { |
77d197b2 XG |
4448 | .read_write_prepare = read_prepare, |
4449 | .read_write_emulate = read_emulate, | |
4450 | .read_write_mmio = vcpu_mmio_read, | |
4451 | .read_write_exit_mmio = read_exit_mmio, | |
4452 | }; | |
4453 | ||
0fbe9b0b | 4454 | static const struct read_write_emulator_ops write_emultor = { |
77d197b2 XG |
4455 | .read_write_emulate = write_emulate, |
4456 | .read_write_mmio = write_mmio, | |
4457 | .read_write_exit_mmio = write_exit_mmio, | |
4458 | .write = true, | |
4459 | }; | |
4460 | ||
22388a3c XG |
4461 | static int emulator_read_write_onepage(unsigned long addr, void *val, |
4462 | unsigned int bytes, | |
4463 | struct x86_exception *exception, | |
4464 | struct kvm_vcpu *vcpu, | |
0fbe9b0b | 4465 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 4466 | { |
af7cc7d1 XG |
4467 | gpa_t gpa; |
4468 | int handled, ret; | |
22388a3c | 4469 | bool write = ops->write; |
f78146b0 | 4470 | struct kvm_mmio_fragment *frag; |
10589a46 | 4471 | |
22388a3c | 4472 | ret = vcpu_mmio_gva_to_gpa(vcpu, addr, &gpa, exception, write); |
bbd9b64e | 4473 | |
af7cc7d1 | 4474 | if (ret < 0) |
bbd9b64e | 4475 | return X86EMUL_PROPAGATE_FAULT; |
bbd9b64e CO |
4476 | |
4477 | /* For APIC access vmexit */ | |
af7cc7d1 | 4478 | if (ret) |
bbd9b64e CO |
4479 | goto mmio; |
4480 | ||
22388a3c | 4481 | if (ops->read_write_emulate(vcpu, gpa, val, bytes)) |
bbd9b64e CO |
4482 | return X86EMUL_CONTINUE; |
4483 | ||
4484 | mmio: | |
4485 | /* | |
4486 | * Is this MMIO handled locally? | |
4487 | */ | |
22388a3c | 4488 | handled = ops->read_write_mmio(vcpu, gpa, bytes, val); |
70252a10 | 4489 | if (handled == bytes) |
bbd9b64e | 4490 | return X86EMUL_CONTINUE; |
bbd9b64e | 4491 | |
70252a10 AK |
4492 | gpa += handled; |
4493 | bytes -= handled; | |
4494 | val += handled; | |
4495 | ||
87da7e66 XG |
4496 | WARN_ON(vcpu->mmio_nr_fragments >= KVM_MAX_MMIO_FRAGMENTS); |
4497 | frag = &vcpu->mmio_fragments[vcpu->mmio_nr_fragments++]; | |
4498 | frag->gpa = gpa; | |
4499 | frag->data = val; | |
4500 | frag->len = bytes; | |
f78146b0 | 4501 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
4502 | } |
4503 | ||
52eb5a6d XL |
4504 | static int emulator_read_write(struct x86_emulate_ctxt *ctxt, |
4505 | unsigned long addr, | |
22388a3c XG |
4506 | void *val, unsigned int bytes, |
4507 | struct x86_exception *exception, | |
0fbe9b0b | 4508 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 4509 | { |
0f65dd70 | 4510 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
f78146b0 AK |
4511 | gpa_t gpa; |
4512 | int rc; | |
4513 | ||
4514 | if (ops->read_write_prepare && | |
4515 | ops->read_write_prepare(vcpu, val, bytes)) | |
4516 | return X86EMUL_CONTINUE; | |
4517 | ||
4518 | vcpu->mmio_nr_fragments = 0; | |
0f65dd70 | 4519 | |
bbd9b64e CO |
4520 | /* Crossing a page boundary? */ |
4521 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
f78146b0 | 4522 | int now; |
bbd9b64e CO |
4523 | |
4524 | now = -addr & ~PAGE_MASK; | |
22388a3c XG |
4525 | rc = emulator_read_write_onepage(addr, val, now, exception, |
4526 | vcpu, ops); | |
4527 | ||
bbd9b64e CO |
4528 | if (rc != X86EMUL_CONTINUE) |
4529 | return rc; | |
4530 | addr += now; | |
bac15531 NA |
4531 | if (ctxt->mode != X86EMUL_MODE_PROT64) |
4532 | addr = (u32)addr; | |
bbd9b64e CO |
4533 | val += now; |
4534 | bytes -= now; | |
4535 | } | |
22388a3c | 4536 | |
f78146b0 AK |
4537 | rc = emulator_read_write_onepage(addr, val, bytes, exception, |
4538 | vcpu, ops); | |
4539 | if (rc != X86EMUL_CONTINUE) | |
4540 | return rc; | |
4541 | ||
4542 | if (!vcpu->mmio_nr_fragments) | |
4543 | return rc; | |
4544 | ||
4545 | gpa = vcpu->mmio_fragments[0].gpa; | |
4546 | ||
4547 | vcpu->mmio_needed = 1; | |
4548 | vcpu->mmio_cur_fragment = 0; | |
4549 | ||
87da7e66 | 4550 | vcpu->run->mmio.len = min(8u, vcpu->mmio_fragments[0].len); |
f78146b0 AK |
4551 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = ops->write; |
4552 | vcpu->run->exit_reason = KVM_EXIT_MMIO; | |
4553 | vcpu->run->mmio.phys_addr = gpa; | |
4554 | ||
4555 | return ops->read_write_exit_mmio(vcpu, gpa, val, bytes); | |
22388a3c XG |
4556 | } |
4557 | ||
4558 | static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt, | |
4559 | unsigned long addr, | |
4560 | void *val, | |
4561 | unsigned int bytes, | |
4562 | struct x86_exception *exception) | |
4563 | { | |
4564 | return emulator_read_write(ctxt, addr, val, bytes, | |
4565 | exception, &read_emultor); | |
4566 | } | |
4567 | ||
52eb5a6d | 4568 | static int emulator_write_emulated(struct x86_emulate_ctxt *ctxt, |
22388a3c XG |
4569 | unsigned long addr, |
4570 | const void *val, | |
4571 | unsigned int bytes, | |
4572 | struct x86_exception *exception) | |
4573 | { | |
4574 | return emulator_read_write(ctxt, addr, (void *)val, bytes, | |
4575 | exception, &write_emultor); | |
bbd9b64e | 4576 | } |
bbd9b64e | 4577 | |
daea3e73 AK |
4578 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
4579 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) | |
4580 | ||
4581 | #ifdef CONFIG_X86_64 | |
4582 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) | |
4583 | #else | |
4584 | # define CMPXCHG64(ptr, old, new) \ | |
9749a6c0 | 4585 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
daea3e73 AK |
4586 | #endif |
4587 | ||
0f65dd70 AK |
4588 | static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, |
4589 | unsigned long addr, | |
bbd9b64e CO |
4590 | const void *old, |
4591 | const void *new, | |
4592 | unsigned int bytes, | |
0f65dd70 | 4593 | struct x86_exception *exception) |
bbd9b64e | 4594 | { |
0f65dd70 | 4595 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
daea3e73 AK |
4596 | gpa_t gpa; |
4597 | struct page *page; | |
4598 | char *kaddr; | |
4599 | bool exchanged; | |
2bacc55c | 4600 | |
daea3e73 AK |
4601 | /* guests cmpxchg8b have to be emulated atomically */ |
4602 | if (bytes > 8 || (bytes & (bytes - 1))) | |
4603 | goto emul_write; | |
10589a46 | 4604 | |
daea3e73 | 4605 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
2bacc55c | 4606 | |
daea3e73 AK |
4607 | if (gpa == UNMAPPED_GVA || |
4608 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4609 | goto emul_write; | |
2bacc55c | 4610 | |
daea3e73 AK |
4611 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
4612 | goto emul_write; | |
72dc67a6 | 4613 | |
54bf36aa | 4614 | page = kvm_vcpu_gfn_to_page(vcpu, gpa >> PAGE_SHIFT); |
32cad84f | 4615 | if (is_error_page(page)) |
c19b8bd6 | 4616 | goto emul_write; |
72dc67a6 | 4617 | |
8fd75e12 | 4618 | kaddr = kmap_atomic(page); |
daea3e73 AK |
4619 | kaddr += offset_in_page(gpa); |
4620 | switch (bytes) { | |
4621 | case 1: | |
4622 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); | |
4623 | break; | |
4624 | case 2: | |
4625 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); | |
4626 | break; | |
4627 | case 4: | |
4628 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); | |
4629 | break; | |
4630 | case 8: | |
4631 | exchanged = CMPXCHG64(kaddr, old, new); | |
4632 | break; | |
4633 | default: | |
4634 | BUG(); | |
2bacc55c | 4635 | } |
8fd75e12 | 4636 | kunmap_atomic(kaddr); |
daea3e73 AK |
4637 | kvm_release_page_dirty(page); |
4638 | ||
4639 | if (!exchanged) | |
4640 | return X86EMUL_CMPXCHG_FAILED; | |
4641 | ||
54bf36aa | 4642 | kvm_vcpu_mark_page_dirty(vcpu, gpa >> PAGE_SHIFT); |
0eb05bf2 | 4643 | kvm_page_track_write(vcpu, gpa, new, bytes); |
8f6abd06 GN |
4644 | |
4645 | return X86EMUL_CONTINUE; | |
4a5f48f6 | 4646 | |
3200f405 | 4647 | emul_write: |
daea3e73 | 4648 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c | 4649 | |
0f65dd70 | 4650 | return emulator_write_emulated(ctxt, addr, new, bytes, exception); |
bbd9b64e CO |
4651 | } |
4652 | ||
cf8f70bf GN |
4653 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
4654 | { | |
4655 | /* TODO: String I/O for in kernel device */ | |
4656 | int r; | |
4657 | ||
4658 | if (vcpu->arch.pio.in) | |
e32edf4f | 4659 | r = kvm_io_bus_read(vcpu, KVM_PIO_BUS, vcpu->arch.pio.port, |
cf8f70bf GN |
4660 | vcpu->arch.pio.size, pd); |
4661 | else | |
e32edf4f | 4662 | r = kvm_io_bus_write(vcpu, KVM_PIO_BUS, |
cf8f70bf GN |
4663 | vcpu->arch.pio.port, vcpu->arch.pio.size, |
4664 | pd); | |
4665 | return r; | |
4666 | } | |
4667 | ||
6f6fbe98 XG |
4668 | static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size, |
4669 | unsigned short port, void *val, | |
4670 | unsigned int count, bool in) | |
cf8f70bf | 4671 | { |
cf8f70bf | 4672 | vcpu->arch.pio.port = port; |
6f6fbe98 | 4673 | vcpu->arch.pio.in = in; |
7972995b | 4674 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
4675 | vcpu->arch.pio.size = size; |
4676 | ||
4677 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
7972995b | 4678 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4679 | return 1; |
4680 | } | |
4681 | ||
4682 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
6f6fbe98 | 4683 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; |
cf8f70bf GN |
4684 | vcpu->run->io.size = size; |
4685 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
4686 | vcpu->run->io.count = count; | |
4687 | vcpu->run->io.port = port; | |
4688 | ||
4689 | return 0; | |
4690 | } | |
4691 | ||
6f6fbe98 XG |
4692 | static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt, |
4693 | int size, unsigned short port, void *val, | |
4694 | unsigned int count) | |
cf8f70bf | 4695 | { |
ca1d4a9e | 4696 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
6f6fbe98 | 4697 | int ret; |
ca1d4a9e | 4698 | |
6f6fbe98 XG |
4699 | if (vcpu->arch.pio.count) |
4700 | goto data_avail; | |
cf8f70bf | 4701 | |
6f6fbe98 XG |
4702 | ret = emulator_pio_in_out(vcpu, size, port, val, count, true); |
4703 | if (ret) { | |
4704 | data_avail: | |
4705 | memcpy(val, vcpu->arch.pio_data, size * count); | |
1171903d | 4706 | trace_kvm_pio(KVM_PIO_IN, port, size, count, vcpu->arch.pio_data); |
7972995b | 4707 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4708 | return 1; |
4709 | } | |
4710 | ||
cf8f70bf GN |
4711 | return 0; |
4712 | } | |
4713 | ||
6f6fbe98 XG |
4714 | static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt, |
4715 | int size, unsigned short port, | |
4716 | const void *val, unsigned int count) | |
4717 | { | |
4718 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4719 | ||
4720 | memcpy(vcpu->arch.pio_data, val, size * count); | |
1171903d | 4721 | trace_kvm_pio(KVM_PIO_OUT, port, size, count, vcpu->arch.pio_data); |
6f6fbe98 XG |
4722 | return emulator_pio_in_out(vcpu, size, port, (void *)val, count, false); |
4723 | } | |
4724 | ||
bbd9b64e CO |
4725 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
4726 | { | |
4727 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
4728 | } | |
4729 | ||
3cb16fe7 | 4730 | static void emulator_invlpg(struct x86_emulate_ctxt *ctxt, ulong address) |
bbd9b64e | 4731 | { |
3cb16fe7 | 4732 | kvm_mmu_invlpg(emul_to_vcpu(ctxt), address); |
bbd9b64e CO |
4733 | } |
4734 | ||
5cb56059 | 4735 | int kvm_emulate_wbinvd_noskip(struct kvm_vcpu *vcpu) |
f5f48ee1 SY |
4736 | { |
4737 | if (!need_emulate_wbinvd(vcpu)) | |
4738 | return X86EMUL_CONTINUE; | |
4739 | ||
4740 | if (kvm_x86_ops->has_wbinvd_exit()) { | |
2eec7343 JK |
4741 | int cpu = get_cpu(); |
4742 | ||
4743 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
f5f48ee1 SY |
4744 | smp_call_function_many(vcpu->arch.wbinvd_dirty_mask, |
4745 | wbinvd_ipi, NULL, 1); | |
2eec7343 | 4746 | put_cpu(); |
f5f48ee1 | 4747 | cpumask_clear(vcpu->arch.wbinvd_dirty_mask); |
2eec7343 JK |
4748 | } else |
4749 | wbinvd(); | |
f5f48ee1 SY |
4750 | return X86EMUL_CONTINUE; |
4751 | } | |
5cb56059 JS |
4752 | |
4753 | int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
4754 | { | |
4755 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
4756 | return kvm_emulate_wbinvd_noskip(vcpu); | |
4757 | } | |
f5f48ee1 SY |
4758 | EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd); |
4759 | ||
5cb56059 JS |
4760 | |
4761 | ||
bcaf5cc5 AK |
4762 | static void emulator_wbinvd(struct x86_emulate_ctxt *ctxt) |
4763 | { | |
5cb56059 | 4764 | kvm_emulate_wbinvd_noskip(emul_to_vcpu(ctxt)); |
bcaf5cc5 AK |
4765 | } |
4766 | ||
52eb5a6d XL |
4767 | static int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, |
4768 | unsigned long *dest) | |
bbd9b64e | 4769 | { |
16f8a6f9 | 4770 | return kvm_get_dr(emul_to_vcpu(ctxt), dr, dest); |
bbd9b64e CO |
4771 | } |
4772 | ||
52eb5a6d XL |
4773 | static int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, |
4774 | unsigned long value) | |
bbd9b64e | 4775 | { |
338dbc97 | 4776 | |
717746e3 | 4777 | return __kvm_set_dr(emul_to_vcpu(ctxt), dr, value); |
bbd9b64e CO |
4778 | } |
4779 | ||
52a46617 | 4780 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
5fdbf976 | 4781 | { |
52a46617 | 4782 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
5fdbf976 MT |
4783 | } |
4784 | ||
717746e3 | 4785 | static unsigned long emulator_get_cr(struct x86_emulate_ctxt *ctxt, int cr) |
bbd9b64e | 4786 | { |
717746e3 | 4787 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
52a46617 GN |
4788 | unsigned long value; |
4789 | ||
4790 | switch (cr) { | |
4791 | case 0: | |
4792 | value = kvm_read_cr0(vcpu); | |
4793 | break; | |
4794 | case 2: | |
4795 | value = vcpu->arch.cr2; | |
4796 | break; | |
4797 | case 3: | |
9f8fe504 | 4798 | value = kvm_read_cr3(vcpu); |
52a46617 GN |
4799 | break; |
4800 | case 4: | |
4801 | value = kvm_read_cr4(vcpu); | |
4802 | break; | |
4803 | case 8: | |
4804 | value = kvm_get_cr8(vcpu); | |
4805 | break; | |
4806 | default: | |
a737f256 | 4807 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
52a46617 GN |
4808 | return 0; |
4809 | } | |
4810 | ||
4811 | return value; | |
4812 | } | |
4813 | ||
717746e3 | 4814 | static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val) |
52a46617 | 4815 | { |
717746e3 | 4816 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
0f12244f GN |
4817 | int res = 0; |
4818 | ||
52a46617 GN |
4819 | switch (cr) { |
4820 | case 0: | |
49a9b07e | 4821 | res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
52a46617 GN |
4822 | break; |
4823 | case 2: | |
4824 | vcpu->arch.cr2 = val; | |
4825 | break; | |
4826 | case 3: | |
2390218b | 4827 | res = kvm_set_cr3(vcpu, val); |
52a46617 GN |
4828 | break; |
4829 | case 4: | |
a83b29c6 | 4830 | res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
52a46617 GN |
4831 | break; |
4832 | case 8: | |
eea1cff9 | 4833 | res = kvm_set_cr8(vcpu, val); |
52a46617 GN |
4834 | break; |
4835 | default: | |
a737f256 | 4836 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
0f12244f | 4837 | res = -1; |
52a46617 | 4838 | } |
0f12244f GN |
4839 | |
4840 | return res; | |
52a46617 GN |
4841 | } |
4842 | ||
717746e3 | 4843 | static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt) |
9c537244 | 4844 | { |
717746e3 | 4845 | return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt)); |
9c537244 GN |
4846 | } |
4847 | ||
4bff1e86 | 4848 | static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
2dafc6c2 | 4849 | { |
4bff1e86 | 4850 | kvm_x86_ops->get_gdt(emul_to_vcpu(ctxt), dt); |
2dafc6c2 GN |
4851 | } |
4852 | ||
4bff1e86 | 4853 | static void emulator_get_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
160ce1f1 | 4854 | { |
4bff1e86 | 4855 | kvm_x86_ops->get_idt(emul_to_vcpu(ctxt), dt); |
160ce1f1 MG |
4856 | } |
4857 | ||
1ac9d0cf AK |
4858 | static void emulator_set_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
4859 | { | |
4860 | kvm_x86_ops->set_gdt(emul_to_vcpu(ctxt), dt); | |
4861 | } | |
4862 | ||
4863 | static void emulator_set_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) | |
4864 | { | |
4865 | kvm_x86_ops->set_idt(emul_to_vcpu(ctxt), dt); | |
4866 | } | |
4867 | ||
4bff1e86 AK |
4868 | static unsigned long emulator_get_cached_segment_base( |
4869 | struct x86_emulate_ctxt *ctxt, int seg) | |
5951c442 | 4870 | { |
4bff1e86 | 4871 | return get_segment_base(emul_to_vcpu(ctxt), seg); |
5951c442 GN |
4872 | } |
4873 | ||
1aa36616 AK |
4874 | static bool emulator_get_segment(struct x86_emulate_ctxt *ctxt, u16 *selector, |
4875 | struct desc_struct *desc, u32 *base3, | |
4876 | int seg) | |
2dafc6c2 GN |
4877 | { |
4878 | struct kvm_segment var; | |
4879 | ||
4bff1e86 | 4880 | kvm_get_segment(emul_to_vcpu(ctxt), &var, seg); |
1aa36616 | 4881 | *selector = var.selector; |
2dafc6c2 | 4882 | |
378a8b09 GN |
4883 | if (var.unusable) { |
4884 | memset(desc, 0, sizeof(*desc)); | |
2dafc6c2 | 4885 | return false; |
378a8b09 | 4886 | } |
2dafc6c2 GN |
4887 | |
4888 | if (var.g) | |
4889 | var.limit >>= 12; | |
4890 | set_desc_limit(desc, var.limit); | |
4891 | set_desc_base(desc, (unsigned long)var.base); | |
5601d05b GN |
4892 | #ifdef CONFIG_X86_64 |
4893 | if (base3) | |
4894 | *base3 = var.base >> 32; | |
4895 | #endif | |
2dafc6c2 GN |
4896 | desc->type = var.type; |
4897 | desc->s = var.s; | |
4898 | desc->dpl = var.dpl; | |
4899 | desc->p = var.present; | |
4900 | desc->avl = var.avl; | |
4901 | desc->l = var.l; | |
4902 | desc->d = var.db; | |
4903 | desc->g = var.g; | |
4904 | ||
4905 | return true; | |
4906 | } | |
4907 | ||
1aa36616 AK |
4908 | static void emulator_set_segment(struct x86_emulate_ctxt *ctxt, u16 selector, |
4909 | struct desc_struct *desc, u32 base3, | |
4910 | int seg) | |
2dafc6c2 | 4911 | { |
4bff1e86 | 4912 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
2dafc6c2 GN |
4913 | struct kvm_segment var; |
4914 | ||
1aa36616 | 4915 | var.selector = selector; |
2dafc6c2 | 4916 | var.base = get_desc_base(desc); |
5601d05b GN |
4917 | #ifdef CONFIG_X86_64 |
4918 | var.base |= ((u64)base3) << 32; | |
4919 | #endif | |
2dafc6c2 GN |
4920 | var.limit = get_desc_limit(desc); |
4921 | if (desc->g) | |
4922 | var.limit = (var.limit << 12) | 0xfff; | |
4923 | var.type = desc->type; | |
2dafc6c2 GN |
4924 | var.dpl = desc->dpl; |
4925 | var.db = desc->d; | |
4926 | var.s = desc->s; | |
4927 | var.l = desc->l; | |
4928 | var.g = desc->g; | |
4929 | var.avl = desc->avl; | |
4930 | var.present = desc->p; | |
4931 | var.unusable = !var.present; | |
4932 | var.padding = 0; | |
4933 | ||
4934 | kvm_set_segment(vcpu, &var, seg); | |
4935 | return; | |
4936 | } | |
4937 | ||
717746e3 AK |
4938 | static int emulator_get_msr(struct x86_emulate_ctxt *ctxt, |
4939 | u32 msr_index, u64 *pdata) | |
4940 | { | |
609e36d3 PB |
4941 | struct msr_data msr; |
4942 | int r; | |
4943 | ||
4944 | msr.index = msr_index; | |
4945 | msr.host_initiated = false; | |
4946 | r = kvm_get_msr(emul_to_vcpu(ctxt), &msr); | |
4947 | if (r) | |
4948 | return r; | |
4949 | ||
4950 | *pdata = msr.data; | |
4951 | return 0; | |
717746e3 AK |
4952 | } |
4953 | ||
4954 | static int emulator_set_msr(struct x86_emulate_ctxt *ctxt, | |
4955 | u32 msr_index, u64 data) | |
4956 | { | |
8fe8ab46 WA |
4957 | struct msr_data msr; |
4958 | ||
4959 | msr.data = data; | |
4960 | msr.index = msr_index; | |
4961 | msr.host_initiated = false; | |
4962 | return kvm_set_msr(emul_to_vcpu(ctxt), &msr); | |
717746e3 AK |
4963 | } |
4964 | ||
64d60670 PB |
4965 | static u64 emulator_get_smbase(struct x86_emulate_ctxt *ctxt) |
4966 | { | |
4967 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4968 | ||
4969 | return vcpu->arch.smbase; | |
4970 | } | |
4971 | ||
4972 | static void emulator_set_smbase(struct x86_emulate_ctxt *ctxt, u64 smbase) | |
4973 | { | |
4974 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4975 | ||
4976 | vcpu->arch.smbase = smbase; | |
4977 | } | |
4978 | ||
67f4d428 NA |
4979 | static int emulator_check_pmc(struct x86_emulate_ctxt *ctxt, |
4980 | u32 pmc) | |
4981 | { | |
c6702c9d | 4982 | return kvm_pmu_is_valid_msr_idx(emul_to_vcpu(ctxt), pmc); |
67f4d428 NA |
4983 | } |
4984 | ||
222d21aa AK |
4985 | static int emulator_read_pmc(struct x86_emulate_ctxt *ctxt, |
4986 | u32 pmc, u64 *pdata) | |
4987 | { | |
c6702c9d | 4988 | return kvm_pmu_rdpmc(emul_to_vcpu(ctxt), pmc, pdata); |
222d21aa AK |
4989 | } |
4990 | ||
6c3287f7 AK |
4991 | static void emulator_halt(struct x86_emulate_ctxt *ctxt) |
4992 | { | |
4993 | emul_to_vcpu(ctxt)->arch.halt_request = 1; | |
4994 | } | |
4995 | ||
5037f6f3 AK |
4996 | static void emulator_get_fpu(struct x86_emulate_ctxt *ctxt) |
4997 | { | |
4998 | preempt_disable(); | |
5197b808 | 4999 | kvm_load_guest_fpu(emul_to_vcpu(ctxt)); |
5037f6f3 AK |
5000 | /* |
5001 | * CR0.TS may reference the host fpu state, not the guest fpu state, | |
5002 | * so it may be clear at this point. | |
5003 | */ | |
5004 | clts(); | |
5005 | } | |
5006 | ||
5007 | static void emulator_put_fpu(struct x86_emulate_ctxt *ctxt) | |
5008 | { | |
5009 | preempt_enable(); | |
5010 | } | |
5011 | ||
2953538e | 5012 | static int emulator_intercept(struct x86_emulate_ctxt *ctxt, |
8a76d7f2 | 5013 | struct x86_instruction_info *info, |
c4f035c6 AK |
5014 | enum x86_intercept_stage stage) |
5015 | { | |
2953538e | 5016 | return kvm_x86_ops->check_intercept(emul_to_vcpu(ctxt), info, stage); |
c4f035c6 AK |
5017 | } |
5018 | ||
0017f93a | 5019 | static void emulator_get_cpuid(struct x86_emulate_ctxt *ctxt, |
bdb42f5a SB |
5020 | u32 *eax, u32 *ebx, u32 *ecx, u32 *edx) |
5021 | { | |
0017f93a | 5022 | kvm_cpuid(emul_to_vcpu(ctxt), eax, ebx, ecx, edx); |
bdb42f5a SB |
5023 | } |
5024 | ||
dd856efa AK |
5025 | static ulong emulator_read_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg) |
5026 | { | |
5027 | return kvm_register_read(emul_to_vcpu(ctxt), reg); | |
5028 | } | |
5029 | ||
5030 | static void emulator_write_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg, ulong val) | |
5031 | { | |
5032 | kvm_register_write(emul_to_vcpu(ctxt), reg, val); | |
5033 | } | |
5034 | ||
801806d9 NA |
5035 | static void emulator_set_nmi_mask(struct x86_emulate_ctxt *ctxt, bool masked) |
5036 | { | |
5037 | kvm_x86_ops->set_nmi_mask(emul_to_vcpu(ctxt), masked); | |
5038 | } | |
5039 | ||
0225fb50 | 5040 | static const struct x86_emulate_ops emulate_ops = { |
dd856efa AK |
5041 | .read_gpr = emulator_read_gpr, |
5042 | .write_gpr = emulator_write_gpr, | |
1871c602 | 5043 | .read_std = kvm_read_guest_virt_system, |
2dafc6c2 | 5044 | .write_std = kvm_write_guest_virt_system, |
7a036a6f | 5045 | .read_phys = kvm_read_guest_phys_system, |
1871c602 | 5046 | .fetch = kvm_fetch_guest_virt, |
bbd9b64e CO |
5047 | .read_emulated = emulator_read_emulated, |
5048 | .write_emulated = emulator_write_emulated, | |
5049 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
3cb16fe7 | 5050 | .invlpg = emulator_invlpg, |
cf8f70bf GN |
5051 | .pio_in_emulated = emulator_pio_in_emulated, |
5052 | .pio_out_emulated = emulator_pio_out_emulated, | |
1aa36616 AK |
5053 | .get_segment = emulator_get_segment, |
5054 | .set_segment = emulator_set_segment, | |
5951c442 | 5055 | .get_cached_segment_base = emulator_get_cached_segment_base, |
2dafc6c2 | 5056 | .get_gdt = emulator_get_gdt, |
160ce1f1 | 5057 | .get_idt = emulator_get_idt, |
1ac9d0cf AK |
5058 | .set_gdt = emulator_set_gdt, |
5059 | .set_idt = emulator_set_idt, | |
52a46617 GN |
5060 | .get_cr = emulator_get_cr, |
5061 | .set_cr = emulator_set_cr, | |
9c537244 | 5062 | .cpl = emulator_get_cpl, |
35aa5375 GN |
5063 | .get_dr = emulator_get_dr, |
5064 | .set_dr = emulator_set_dr, | |
64d60670 PB |
5065 | .get_smbase = emulator_get_smbase, |
5066 | .set_smbase = emulator_set_smbase, | |
717746e3 AK |
5067 | .set_msr = emulator_set_msr, |
5068 | .get_msr = emulator_get_msr, | |
67f4d428 | 5069 | .check_pmc = emulator_check_pmc, |
222d21aa | 5070 | .read_pmc = emulator_read_pmc, |
6c3287f7 | 5071 | .halt = emulator_halt, |
bcaf5cc5 | 5072 | .wbinvd = emulator_wbinvd, |
d6aa1000 | 5073 | .fix_hypercall = emulator_fix_hypercall, |
5037f6f3 AK |
5074 | .get_fpu = emulator_get_fpu, |
5075 | .put_fpu = emulator_put_fpu, | |
c4f035c6 | 5076 | .intercept = emulator_intercept, |
bdb42f5a | 5077 | .get_cpuid = emulator_get_cpuid, |
801806d9 | 5078 | .set_nmi_mask = emulator_set_nmi_mask, |
bbd9b64e CO |
5079 | }; |
5080 | ||
95cb2295 GN |
5081 | static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |
5082 | { | |
37ccdcbe | 5083 | u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu); |
95cb2295 GN |
5084 | /* |
5085 | * an sti; sti; sequence only disable interrupts for the first | |
5086 | * instruction. So, if the last instruction, be it emulated or | |
5087 | * not, left the system with the INT_STI flag enabled, it | |
5088 | * means that the last instruction is an sti. We should not | |
5089 | * leave the flag on in this case. The same goes for mov ss | |
5090 | */ | |
37ccdcbe PB |
5091 | if (int_shadow & mask) |
5092 | mask = 0; | |
6addfc42 | 5093 | if (unlikely(int_shadow || mask)) { |
95cb2295 | 5094 | kvm_x86_ops->set_interrupt_shadow(vcpu, mask); |
6addfc42 PB |
5095 | if (!mask) |
5096 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
5097 | } | |
95cb2295 GN |
5098 | } |
5099 | ||
ef54bcfe | 5100 | static bool inject_emulated_exception(struct kvm_vcpu *vcpu) |
54b8486f GN |
5101 | { |
5102 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; | |
da9cb575 | 5103 | if (ctxt->exception.vector == PF_VECTOR) |
ef54bcfe PB |
5104 | return kvm_propagate_fault(vcpu, &ctxt->exception); |
5105 | ||
5106 | if (ctxt->exception.error_code_valid) | |
da9cb575 AK |
5107 | kvm_queue_exception_e(vcpu, ctxt->exception.vector, |
5108 | ctxt->exception.error_code); | |
54b8486f | 5109 | else |
da9cb575 | 5110 | kvm_queue_exception(vcpu, ctxt->exception.vector); |
ef54bcfe | 5111 | return false; |
54b8486f GN |
5112 | } |
5113 | ||
8ec4722d MG |
5114 | static void init_emulate_ctxt(struct kvm_vcpu *vcpu) |
5115 | { | |
adf52235 | 5116 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d MG |
5117 | int cs_db, cs_l; |
5118 | ||
8ec4722d MG |
5119 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
5120 | ||
adf52235 TY |
5121 | ctxt->eflags = kvm_get_rflags(vcpu); |
5122 | ctxt->eip = kvm_rip_read(vcpu); | |
5123 | ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : | |
5124 | (ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 : | |
42bf549f | 5125 | (cs_l && is_long_mode(vcpu)) ? X86EMUL_MODE_PROT64 : |
adf52235 TY |
5126 | cs_db ? X86EMUL_MODE_PROT32 : |
5127 | X86EMUL_MODE_PROT16; | |
a584539b | 5128 | BUILD_BUG_ON(HF_GUEST_MASK != X86EMUL_GUEST_MASK); |
64d60670 PB |
5129 | BUILD_BUG_ON(HF_SMM_MASK != X86EMUL_SMM_MASK); |
5130 | BUILD_BUG_ON(HF_SMM_INSIDE_NMI_MASK != X86EMUL_SMM_INSIDE_NMI_MASK); | |
a584539b | 5131 | ctxt->emul_flags = vcpu->arch.hflags; |
adf52235 | 5132 | |
dd856efa | 5133 | init_decode_cache(ctxt); |
7ae441ea | 5134 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; |
8ec4722d MG |
5135 | } |
5136 | ||
71f9833b | 5137 | int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip) |
63995653 | 5138 | { |
9d74191a | 5139 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
63995653 MG |
5140 | int ret; |
5141 | ||
5142 | init_emulate_ctxt(vcpu); | |
5143 | ||
9dac77fa AK |
5144 | ctxt->op_bytes = 2; |
5145 | ctxt->ad_bytes = 2; | |
5146 | ctxt->_eip = ctxt->eip + inc_eip; | |
9d74191a | 5147 | ret = emulate_int_real(ctxt, irq); |
63995653 MG |
5148 | |
5149 | if (ret != X86EMUL_CONTINUE) | |
5150 | return EMULATE_FAIL; | |
5151 | ||
9dac77fa | 5152 | ctxt->eip = ctxt->_eip; |
9d74191a TY |
5153 | kvm_rip_write(vcpu, ctxt->eip); |
5154 | kvm_set_rflags(vcpu, ctxt->eflags); | |
63995653 MG |
5155 | |
5156 | if (irq == NMI_VECTOR) | |
7460fb4a | 5157 | vcpu->arch.nmi_pending = 0; |
63995653 MG |
5158 | else |
5159 | vcpu->arch.interrupt.pending = false; | |
5160 | ||
5161 | return EMULATE_DONE; | |
5162 | } | |
5163 | EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt); | |
5164 | ||
6d77dbfc GN |
5165 | static int handle_emulation_failure(struct kvm_vcpu *vcpu) |
5166 | { | |
fc3a9157 JR |
5167 | int r = EMULATE_DONE; |
5168 | ||
6d77dbfc GN |
5169 | ++vcpu->stat.insn_emulation_fail; |
5170 | trace_kvm_emulate_insn_failed(vcpu); | |
a2b9e6c1 | 5171 | if (!is_guest_mode(vcpu) && kvm_x86_ops->get_cpl(vcpu) == 0) { |
fc3a9157 JR |
5172 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
5173 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
5174 | vcpu->run->internal.ndata = 0; | |
5175 | r = EMULATE_FAIL; | |
5176 | } | |
6d77dbfc | 5177 | kvm_queue_exception(vcpu, UD_VECTOR); |
fc3a9157 JR |
5178 | |
5179 | return r; | |
6d77dbfc GN |
5180 | } |
5181 | ||
93c05d3e | 5182 | static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2, |
991eebf9 GN |
5183 | bool write_fault_to_shadow_pgtable, |
5184 | int emulation_type) | |
a6f177ef | 5185 | { |
95b3cf69 | 5186 | gpa_t gpa = cr2; |
ba049e93 | 5187 | kvm_pfn_t pfn; |
a6f177ef | 5188 | |
991eebf9 GN |
5189 | if (emulation_type & EMULTYPE_NO_REEXECUTE) |
5190 | return false; | |
5191 | ||
95b3cf69 XG |
5192 | if (!vcpu->arch.mmu.direct_map) { |
5193 | /* | |
5194 | * Write permission should be allowed since only | |
5195 | * write access need to be emulated. | |
5196 | */ | |
5197 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
a6f177ef | 5198 | |
95b3cf69 XG |
5199 | /* |
5200 | * If the mapping is invalid in guest, let cpu retry | |
5201 | * it to generate fault. | |
5202 | */ | |
5203 | if (gpa == UNMAPPED_GVA) | |
5204 | return true; | |
5205 | } | |
a6f177ef | 5206 | |
8e3d9d06 XG |
5207 | /* |
5208 | * Do not retry the unhandleable instruction if it faults on the | |
5209 | * readonly host memory, otherwise it will goto a infinite loop: | |
5210 | * retry instruction -> write #PF -> emulation fail -> retry | |
5211 | * instruction -> ... | |
5212 | */ | |
5213 | pfn = gfn_to_pfn(vcpu->kvm, gpa_to_gfn(gpa)); | |
95b3cf69 XG |
5214 | |
5215 | /* | |
5216 | * If the instruction failed on the error pfn, it can not be fixed, | |
5217 | * report the error to userspace. | |
5218 | */ | |
5219 | if (is_error_noslot_pfn(pfn)) | |
5220 | return false; | |
5221 | ||
5222 | kvm_release_pfn_clean(pfn); | |
5223 | ||
5224 | /* The instructions are well-emulated on direct mmu. */ | |
5225 | if (vcpu->arch.mmu.direct_map) { | |
5226 | unsigned int indirect_shadow_pages; | |
5227 | ||
5228 | spin_lock(&vcpu->kvm->mmu_lock); | |
5229 | indirect_shadow_pages = vcpu->kvm->arch.indirect_shadow_pages; | |
5230 | spin_unlock(&vcpu->kvm->mmu_lock); | |
5231 | ||
5232 | if (indirect_shadow_pages) | |
5233 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
5234 | ||
a6f177ef | 5235 | return true; |
8e3d9d06 | 5236 | } |
a6f177ef | 5237 | |
95b3cf69 XG |
5238 | /* |
5239 | * if emulation was due to access to shadowed page table | |
5240 | * and it failed try to unshadow page and re-enter the | |
5241 | * guest to let CPU execute the instruction. | |
5242 | */ | |
5243 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
93c05d3e XG |
5244 | |
5245 | /* | |
5246 | * If the access faults on its page table, it can not | |
5247 | * be fixed by unprotecting shadow page and it should | |
5248 | * be reported to userspace. | |
5249 | */ | |
5250 | return !write_fault_to_shadow_pgtable; | |
a6f177ef GN |
5251 | } |
5252 | ||
1cb3f3ae XG |
5253 | static bool retry_instruction(struct x86_emulate_ctxt *ctxt, |
5254 | unsigned long cr2, int emulation_type) | |
5255 | { | |
5256 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5257 | unsigned long last_retry_eip, last_retry_addr, gpa = cr2; | |
5258 | ||
5259 | last_retry_eip = vcpu->arch.last_retry_eip; | |
5260 | last_retry_addr = vcpu->arch.last_retry_addr; | |
5261 | ||
5262 | /* | |
5263 | * If the emulation is caused by #PF and it is non-page_table | |
5264 | * writing instruction, it means the VM-EXIT is caused by shadow | |
5265 | * page protected, we can zap the shadow page and retry this | |
5266 | * instruction directly. | |
5267 | * | |
5268 | * Note: if the guest uses a non-page-table modifying instruction | |
5269 | * on the PDE that points to the instruction, then we will unmap | |
5270 | * the instruction and go to an infinite loop. So, we cache the | |
5271 | * last retried eip and the last fault address, if we meet the eip | |
5272 | * and the address again, we can break out of the potential infinite | |
5273 | * loop. | |
5274 | */ | |
5275 | vcpu->arch.last_retry_eip = vcpu->arch.last_retry_addr = 0; | |
5276 | ||
5277 | if (!(emulation_type & EMULTYPE_RETRY)) | |
5278 | return false; | |
5279 | ||
5280 | if (x86_page_table_writing_insn(ctxt)) | |
5281 | return false; | |
5282 | ||
5283 | if (ctxt->eip == last_retry_eip && last_retry_addr == cr2) | |
5284 | return false; | |
5285 | ||
5286 | vcpu->arch.last_retry_eip = ctxt->eip; | |
5287 | vcpu->arch.last_retry_addr = cr2; | |
5288 | ||
5289 | if (!vcpu->arch.mmu.direct_map) | |
5290 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
5291 | ||
22368028 | 5292 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); |
1cb3f3ae XG |
5293 | |
5294 | return true; | |
5295 | } | |
5296 | ||
716d51ab GN |
5297 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu); |
5298 | static int complete_emulated_pio(struct kvm_vcpu *vcpu); | |
5299 | ||
64d60670 | 5300 | static void kvm_smm_changed(struct kvm_vcpu *vcpu) |
a584539b | 5301 | { |
64d60670 | 5302 | if (!(vcpu->arch.hflags & HF_SMM_MASK)) { |
660a5d51 PB |
5303 | /* This is a good place to trace that we are exiting SMM. */ |
5304 | trace_kvm_enter_smm(vcpu->vcpu_id, vcpu->arch.smbase, false); | |
5305 | ||
c43203ca PB |
5306 | /* Process a latched INIT or SMI, if any. */ |
5307 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
64d60670 | 5308 | } |
699023e2 PB |
5309 | |
5310 | kvm_mmu_reset_context(vcpu); | |
64d60670 PB |
5311 | } |
5312 | ||
5313 | static void kvm_set_hflags(struct kvm_vcpu *vcpu, unsigned emul_flags) | |
5314 | { | |
5315 | unsigned changed = vcpu->arch.hflags ^ emul_flags; | |
5316 | ||
a584539b | 5317 | vcpu->arch.hflags = emul_flags; |
64d60670 PB |
5318 | |
5319 | if (changed & HF_SMM_MASK) | |
5320 | kvm_smm_changed(vcpu); | |
a584539b PB |
5321 | } |
5322 | ||
4a1e10d5 PB |
5323 | static int kvm_vcpu_check_hw_bp(unsigned long addr, u32 type, u32 dr7, |
5324 | unsigned long *db) | |
5325 | { | |
5326 | u32 dr6 = 0; | |
5327 | int i; | |
5328 | u32 enable, rwlen; | |
5329 | ||
5330 | enable = dr7; | |
5331 | rwlen = dr7 >> 16; | |
5332 | for (i = 0; i < 4; i++, enable >>= 2, rwlen >>= 4) | |
5333 | if ((enable & 3) && (rwlen & 15) == type && db[i] == addr) | |
5334 | dr6 |= (1 << i); | |
5335 | return dr6; | |
5336 | } | |
5337 | ||
6addfc42 | 5338 | static void kvm_vcpu_check_singlestep(struct kvm_vcpu *vcpu, unsigned long rflags, int *r) |
663f4c61 PB |
5339 | { |
5340 | struct kvm_run *kvm_run = vcpu->run; | |
5341 | ||
5342 | /* | |
6addfc42 PB |
5343 | * rflags is the old, "raw" value of the flags. The new value has |
5344 | * not been saved yet. | |
663f4c61 PB |
5345 | * |
5346 | * This is correct even for TF set by the guest, because "the | |
5347 | * processor will not generate this exception after the instruction | |
5348 | * that sets the TF flag". | |
5349 | */ | |
663f4c61 PB |
5350 | if (unlikely(rflags & X86_EFLAGS_TF)) { |
5351 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) { | |
6f43ed01 NA |
5352 | kvm_run->debug.arch.dr6 = DR6_BS | DR6_FIXED_1 | |
5353 | DR6_RTM; | |
663f4c61 PB |
5354 | kvm_run->debug.arch.pc = vcpu->arch.singlestep_rip; |
5355 | kvm_run->debug.arch.exception = DB_VECTOR; | |
5356 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
5357 | *r = EMULATE_USER_EXIT; | |
5358 | } else { | |
5359 | vcpu->arch.emulate_ctxt.eflags &= ~X86_EFLAGS_TF; | |
5360 | /* | |
5361 | * "Certain debug exceptions may clear bit 0-3. The | |
5362 | * remaining contents of the DR6 register are never | |
5363 | * cleared by the processor". | |
5364 | */ | |
5365 | vcpu->arch.dr6 &= ~15; | |
6f43ed01 | 5366 | vcpu->arch.dr6 |= DR6_BS | DR6_RTM; |
663f4c61 PB |
5367 | kvm_queue_exception(vcpu, DB_VECTOR); |
5368 | } | |
5369 | } | |
5370 | } | |
5371 | ||
4a1e10d5 PB |
5372 | static bool kvm_vcpu_check_breakpoint(struct kvm_vcpu *vcpu, int *r) |
5373 | { | |
4a1e10d5 PB |
5374 | if (unlikely(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) && |
5375 | (vcpu->arch.guest_debug_dr7 & DR7_BP_EN_MASK)) { | |
82b32774 NA |
5376 | struct kvm_run *kvm_run = vcpu->run; |
5377 | unsigned long eip = kvm_get_linear_rip(vcpu); | |
5378 | u32 dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
4a1e10d5 PB |
5379 | vcpu->arch.guest_debug_dr7, |
5380 | vcpu->arch.eff_db); | |
5381 | ||
5382 | if (dr6 != 0) { | |
6f43ed01 | 5383 | kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1 | DR6_RTM; |
82b32774 | 5384 | kvm_run->debug.arch.pc = eip; |
4a1e10d5 PB |
5385 | kvm_run->debug.arch.exception = DB_VECTOR; |
5386 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
5387 | *r = EMULATE_USER_EXIT; | |
5388 | return true; | |
5389 | } | |
5390 | } | |
5391 | ||
4161a569 NA |
5392 | if (unlikely(vcpu->arch.dr7 & DR7_BP_EN_MASK) && |
5393 | !(kvm_get_rflags(vcpu) & X86_EFLAGS_RF)) { | |
82b32774 NA |
5394 | unsigned long eip = kvm_get_linear_rip(vcpu); |
5395 | u32 dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
4a1e10d5 PB |
5396 | vcpu->arch.dr7, |
5397 | vcpu->arch.db); | |
5398 | ||
5399 | if (dr6 != 0) { | |
5400 | vcpu->arch.dr6 &= ~15; | |
6f43ed01 | 5401 | vcpu->arch.dr6 |= dr6 | DR6_RTM; |
4a1e10d5 PB |
5402 | kvm_queue_exception(vcpu, DB_VECTOR); |
5403 | *r = EMULATE_DONE; | |
5404 | return true; | |
5405 | } | |
5406 | } | |
5407 | ||
5408 | return false; | |
5409 | } | |
5410 | ||
51d8b661 AP |
5411 | int x86_emulate_instruction(struct kvm_vcpu *vcpu, |
5412 | unsigned long cr2, | |
dc25e89e AP |
5413 | int emulation_type, |
5414 | void *insn, | |
5415 | int insn_len) | |
bbd9b64e | 5416 | { |
95cb2295 | 5417 | int r; |
9d74191a | 5418 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
7ae441ea | 5419 | bool writeback = true; |
93c05d3e | 5420 | bool write_fault_to_spt = vcpu->arch.write_fault_to_shadow_pgtable; |
bbd9b64e | 5421 | |
93c05d3e XG |
5422 | /* |
5423 | * Clear write_fault_to_shadow_pgtable here to ensure it is | |
5424 | * never reused. | |
5425 | */ | |
5426 | vcpu->arch.write_fault_to_shadow_pgtable = false; | |
26eef70c | 5427 | kvm_clear_exception_queue(vcpu); |
8d7d8102 | 5428 | |
571008da | 5429 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
8ec4722d | 5430 | init_emulate_ctxt(vcpu); |
4a1e10d5 PB |
5431 | |
5432 | /* | |
5433 | * We will reenter on the same instruction since | |
5434 | * we do not set complete_userspace_io. This does not | |
5435 | * handle watchpoints yet, those would be handled in | |
5436 | * the emulate_ops. | |
5437 | */ | |
5438 | if (kvm_vcpu_check_breakpoint(vcpu, &r)) | |
5439 | return r; | |
5440 | ||
9d74191a TY |
5441 | ctxt->interruptibility = 0; |
5442 | ctxt->have_exception = false; | |
e0ad0b47 | 5443 | ctxt->exception.vector = -1; |
9d74191a | 5444 | ctxt->perm_ok = false; |
bbd9b64e | 5445 | |
b51e974f | 5446 | ctxt->ud = emulation_type & EMULTYPE_TRAP_UD; |
4005996e | 5447 | |
9d74191a | 5448 | r = x86_decode_insn(ctxt, insn, insn_len); |
bbd9b64e | 5449 | |
e46479f8 | 5450 | trace_kvm_emulate_insn_start(vcpu); |
f2b5756b | 5451 | ++vcpu->stat.insn_emulation; |
1d2887e2 | 5452 | if (r != EMULATION_OK) { |
4005996e AK |
5453 | if (emulation_type & EMULTYPE_TRAP_UD) |
5454 | return EMULATE_FAIL; | |
991eebf9 GN |
5455 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
5456 | emulation_type)) | |
bbd9b64e | 5457 | return EMULATE_DONE; |
6d77dbfc GN |
5458 | if (emulation_type & EMULTYPE_SKIP) |
5459 | return EMULATE_FAIL; | |
5460 | return handle_emulation_failure(vcpu); | |
bbd9b64e CO |
5461 | } |
5462 | } | |
5463 | ||
ba8afb6b | 5464 | if (emulation_type & EMULTYPE_SKIP) { |
9dac77fa | 5465 | kvm_rip_write(vcpu, ctxt->_eip); |
bb663c7a NA |
5466 | if (ctxt->eflags & X86_EFLAGS_RF) |
5467 | kvm_set_rflags(vcpu, ctxt->eflags & ~X86_EFLAGS_RF); | |
ba8afb6b GN |
5468 | return EMULATE_DONE; |
5469 | } | |
5470 | ||
1cb3f3ae XG |
5471 | if (retry_instruction(ctxt, cr2, emulation_type)) |
5472 | return EMULATE_DONE; | |
5473 | ||
7ae441ea | 5474 | /* this is needed for vmware backdoor interface to work since it |
4d2179e1 | 5475 | changes registers values during IO operation */ |
7ae441ea GN |
5476 | if (vcpu->arch.emulate_regs_need_sync_from_vcpu) { |
5477 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; | |
dd856efa | 5478 | emulator_invalidate_register_cache(ctxt); |
7ae441ea | 5479 | } |
4d2179e1 | 5480 | |
5cd21917 | 5481 | restart: |
9d74191a | 5482 | r = x86_emulate_insn(ctxt); |
bbd9b64e | 5483 | |
775fde86 JR |
5484 | if (r == EMULATION_INTERCEPTED) |
5485 | return EMULATE_DONE; | |
5486 | ||
d2ddd1c4 | 5487 | if (r == EMULATION_FAILED) { |
991eebf9 GN |
5488 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
5489 | emulation_type)) | |
c3cd7ffa GN |
5490 | return EMULATE_DONE; |
5491 | ||
6d77dbfc | 5492 | return handle_emulation_failure(vcpu); |
bbd9b64e CO |
5493 | } |
5494 | ||
9d74191a | 5495 | if (ctxt->have_exception) { |
d2ddd1c4 | 5496 | r = EMULATE_DONE; |
ef54bcfe PB |
5497 | if (inject_emulated_exception(vcpu)) |
5498 | return r; | |
d2ddd1c4 | 5499 | } else if (vcpu->arch.pio.count) { |
0912c977 PB |
5500 | if (!vcpu->arch.pio.in) { |
5501 | /* FIXME: return into emulator if single-stepping. */ | |
3457e419 | 5502 | vcpu->arch.pio.count = 0; |
0912c977 | 5503 | } else { |
7ae441ea | 5504 | writeback = false; |
716d51ab GN |
5505 | vcpu->arch.complete_userspace_io = complete_emulated_pio; |
5506 | } | |
ac0a48c3 | 5507 | r = EMULATE_USER_EXIT; |
7ae441ea GN |
5508 | } else if (vcpu->mmio_needed) { |
5509 | if (!vcpu->mmio_is_write) | |
5510 | writeback = false; | |
ac0a48c3 | 5511 | r = EMULATE_USER_EXIT; |
716d51ab | 5512 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; |
7ae441ea | 5513 | } else if (r == EMULATION_RESTART) |
5cd21917 | 5514 | goto restart; |
d2ddd1c4 GN |
5515 | else |
5516 | r = EMULATE_DONE; | |
f850e2e6 | 5517 | |
7ae441ea | 5518 | if (writeback) { |
6addfc42 | 5519 | unsigned long rflags = kvm_x86_ops->get_rflags(vcpu); |
9d74191a | 5520 | toggle_interruptibility(vcpu, ctxt->interruptibility); |
7ae441ea | 5521 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
a584539b PB |
5522 | if (vcpu->arch.hflags != ctxt->emul_flags) |
5523 | kvm_set_hflags(vcpu, ctxt->emul_flags); | |
9d74191a | 5524 | kvm_rip_write(vcpu, ctxt->eip); |
663f4c61 | 5525 | if (r == EMULATE_DONE) |
6addfc42 | 5526 | kvm_vcpu_check_singlestep(vcpu, rflags, &r); |
38827dbd NA |
5527 | if (!ctxt->have_exception || |
5528 | exception_type(ctxt->exception.vector) == EXCPT_TRAP) | |
5529 | __kvm_set_rflags(vcpu, ctxt->eflags); | |
6addfc42 PB |
5530 | |
5531 | /* | |
5532 | * For STI, interrupts are shadowed; so KVM_REQ_EVENT will | |
5533 | * do nothing, and it will be requested again as soon as | |
5534 | * the shadow expires. But we still need to check here, | |
5535 | * because POPF has no interrupt shadow. | |
5536 | */ | |
5537 | if (unlikely((ctxt->eflags & ~rflags) & X86_EFLAGS_IF)) | |
5538 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
7ae441ea GN |
5539 | } else |
5540 | vcpu->arch.emulate_regs_need_sync_to_vcpu = true; | |
e85d28f8 GN |
5541 | |
5542 | return r; | |
de7d789a | 5543 | } |
51d8b661 | 5544 | EXPORT_SYMBOL_GPL(x86_emulate_instruction); |
de7d789a | 5545 | |
cf8f70bf | 5546 | int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port) |
de7d789a | 5547 | { |
cf8f70bf | 5548 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
ca1d4a9e AK |
5549 | int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt, |
5550 | size, port, &val, 1); | |
cf8f70bf | 5551 | /* do not return to emulator after return from userspace */ |
7972995b | 5552 | vcpu->arch.pio.count = 0; |
de7d789a CO |
5553 | return ret; |
5554 | } | |
cf8f70bf | 5555 | EXPORT_SYMBOL_GPL(kvm_fast_pio_out); |
de7d789a | 5556 | |
8cfdc000 ZA |
5557 | static void tsc_bad(void *info) |
5558 | { | |
0a3aee0d | 5559 | __this_cpu_write(cpu_tsc_khz, 0); |
8cfdc000 ZA |
5560 | } |
5561 | ||
5562 | static void tsc_khz_changed(void *data) | |
c8076604 | 5563 | { |
8cfdc000 ZA |
5564 | struct cpufreq_freqs *freq = data; |
5565 | unsigned long khz = 0; | |
5566 | ||
5567 | if (data) | |
5568 | khz = freq->new; | |
5569 | else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) | |
5570 | khz = cpufreq_quick_get(raw_smp_processor_id()); | |
5571 | if (!khz) | |
5572 | khz = tsc_khz; | |
0a3aee0d | 5573 | __this_cpu_write(cpu_tsc_khz, khz); |
c8076604 GH |
5574 | } |
5575 | ||
c8076604 GH |
5576 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
5577 | void *data) | |
5578 | { | |
5579 | struct cpufreq_freqs *freq = data; | |
5580 | struct kvm *kvm; | |
5581 | struct kvm_vcpu *vcpu; | |
5582 | int i, send_ipi = 0; | |
5583 | ||
8cfdc000 ZA |
5584 | /* |
5585 | * We allow guests to temporarily run on slowing clocks, | |
5586 | * provided we notify them after, or to run on accelerating | |
5587 | * clocks, provided we notify them before. Thus time never | |
5588 | * goes backwards. | |
5589 | * | |
5590 | * However, we have a problem. We can't atomically update | |
5591 | * the frequency of a given CPU from this function; it is | |
5592 | * merely a notifier, which can be called from any CPU. | |
5593 | * Changing the TSC frequency at arbitrary points in time | |
5594 | * requires a recomputation of local variables related to | |
5595 | * the TSC for each VCPU. We must flag these local variables | |
5596 | * to be updated and be sure the update takes place with the | |
5597 | * new frequency before any guests proceed. | |
5598 | * | |
5599 | * Unfortunately, the combination of hotplug CPU and frequency | |
5600 | * change creates an intractable locking scenario; the order | |
5601 | * of when these callouts happen is undefined with respect to | |
5602 | * CPU hotplug, and they can race with each other. As such, | |
5603 | * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is | |
5604 | * undefined; you can actually have a CPU frequency change take | |
5605 | * place in between the computation of X and the setting of the | |
5606 | * variable. To protect against this problem, all updates of | |
5607 | * the per_cpu tsc_khz variable are done in an interrupt | |
5608 | * protected IPI, and all callers wishing to update the value | |
5609 | * must wait for a synchronous IPI to complete (which is trivial | |
5610 | * if the caller is on the CPU already). This establishes the | |
5611 | * necessary total order on variable updates. | |
5612 | * | |
5613 | * Note that because a guest time update may take place | |
5614 | * anytime after the setting of the VCPU's request bit, the | |
5615 | * correct TSC value must be set before the request. However, | |
5616 | * to ensure the update actually makes it to any guest which | |
5617 | * starts running in hardware virtualization between the set | |
5618 | * and the acquisition of the spinlock, we must also ping the | |
5619 | * CPU after setting the request bit. | |
5620 | * | |
5621 | */ | |
5622 | ||
c8076604 GH |
5623 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
5624 | return 0; | |
5625 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
5626 | return 0; | |
8cfdc000 ZA |
5627 | |
5628 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); | |
c8076604 | 5629 | |
2f303b74 | 5630 | spin_lock(&kvm_lock); |
c8076604 | 5631 | list_for_each_entry(kvm, &vm_list, vm_list) { |
988a2cae | 5632 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
5633 | if (vcpu->cpu != freq->cpu) |
5634 | continue; | |
c285545f | 5635 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
c8076604 | 5636 | if (vcpu->cpu != smp_processor_id()) |
8cfdc000 | 5637 | send_ipi = 1; |
c8076604 GH |
5638 | } |
5639 | } | |
2f303b74 | 5640 | spin_unlock(&kvm_lock); |
c8076604 GH |
5641 | |
5642 | if (freq->old < freq->new && send_ipi) { | |
5643 | /* | |
5644 | * We upscale the frequency. Must make the guest | |
5645 | * doesn't see old kvmclock values while running with | |
5646 | * the new frequency, otherwise we risk the guest sees | |
5647 | * time go backwards. | |
5648 | * | |
5649 | * In case we update the frequency for another cpu | |
5650 | * (which might be in guest context) send an interrupt | |
5651 | * to kick the cpu out of guest context. Next time | |
5652 | * guest context is entered kvmclock will be updated, | |
5653 | * so the guest will not see stale values. | |
5654 | */ | |
8cfdc000 | 5655 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); |
c8076604 GH |
5656 | } |
5657 | return 0; | |
5658 | } | |
5659 | ||
5660 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
8cfdc000 ZA |
5661 | .notifier_call = kvmclock_cpufreq_notifier |
5662 | }; | |
5663 | ||
5664 | static int kvmclock_cpu_notifier(struct notifier_block *nfb, | |
5665 | unsigned long action, void *hcpu) | |
5666 | { | |
5667 | unsigned int cpu = (unsigned long)hcpu; | |
5668 | ||
5669 | switch (action) { | |
5670 | case CPU_ONLINE: | |
5671 | case CPU_DOWN_FAILED: | |
5672 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
5673 | break; | |
5674 | case CPU_DOWN_PREPARE: | |
5675 | smp_call_function_single(cpu, tsc_bad, NULL, 1); | |
5676 | break; | |
5677 | } | |
5678 | return NOTIFY_OK; | |
5679 | } | |
5680 | ||
5681 | static struct notifier_block kvmclock_cpu_notifier_block = { | |
5682 | .notifier_call = kvmclock_cpu_notifier, | |
5683 | .priority = -INT_MAX | |
c8076604 GH |
5684 | }; |
5685 | ||
b820cc0c ZA |
5686 | static void kvm_timer_init(void) |
5687 | { | |
5688 | int cpu; | |
5689 | ||
c285545f | 5690 | max_tsc_khz = tsc_khz; |
460dd42e SB |
5691 | |
5692 | cpu_notifier_register_begin(); | |
b820cc0c | 5693 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
c285545f ZA |
5694 | #ifdef CONFIG_CPU_FREQ |
5695 | struct cpufreq_policy policy; | |
5696 | memset(&policy, 0, sizeof(policy)); | |
3e26f230 AK |
5697 | cpu = get_cpu(); |
5698 | cpufreq_get_policy(&policy, cpu); | |
c285545f ZA |
5699 | if (policy.cpuinfo.max_freq) |
5700 | max_tsc_khz = policy.cpuinfo.max_freq; | |
3e26f230 | 5701 | put_cpu(); |
c285545f | 5702 | #endif |
b820cc0c ZA |
5703 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
5704 | CPUFREQ_TRANSITION_NOTIFIER); | |
5705 | } | |
c285545f | 5706 | pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz); |
8cfdc000 ZA |
5707 | for_each_online_cpu(cpu) |
5708 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
460dd42e SB |
5709 | |
5710 | __register_hotcpu_notifier(&kvmclock_cpu_notifier_block); | |
5711 | cpu_notifier_register_done(); | |
5712 | ||
b820cc0c ZA |
5713 | } |
5714 | ||
ff9d07a0 ZY |
5715 | static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
5716 | ||
f5132b01 | 5717 | int kvm_is_in_guest(void) |
ff9d07a0 | 5718 | { |
086c9855 | 5719 | return __this_cpu_read(current_vcpu) != NULL; |
ff9d07a0 ZY |
5720 | } |
5721 | ||
5722 | static int kvm_is_user_mode(void) | |
5723 | { | |
5724 | int user_mode = 3; | |
dcf46b94 | 5725 | |
086c9855 AS |
5726 | if (__this_cpu_read(current_vcpu)) |
5727 | user_mode = kvm_x86_ops->get_cpl(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 5728 | |
ff9d07a0 ZY |
5729 | return user_mode != 0; |
5730 | } | |
5731 | ||
5732 | static unsigned long kvm_get_guest_ip(void) | |
5733 | { | |
5734 | unsigned long ip = 0; | |
dcf46b94 | 5735 | |
086c9855 AS |
5736 | if (__this_cpu_read(current_vcpu)) |
5737 | ip = kvm_rip_read(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 5738 | |
ff9d07a0 ZY |
5739 | return ip; |
5740 | } | |
5741 | ||
5742 | static struct perf_guest_info_callbacks kvm_guest_cbs = { | |
5743 | .is_in_guest = kvm_is_in_guest, | |
5744 | .is_user_mode = kvm_is_user_mode, | |
5745 | .get_guest_ip = kvm_get_guest_ip, | |
5746 | }; | |
5747 | ||
5748 | void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) | |
5749 | { | |
086c9855 | 5750 | __this_cpu_write(current_vcpu, vcpu); |
ff9d07a0 ZY |
5751 | } |
5752 | EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); | |
5753 | ||
5754 | void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) | |
5755 | { | |
086c9855 | 5756 | __this_cpu_write(current_vcpu, NULL); |
ff9d07a0 ZY |
5757 | } |
5758 | EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); | |
5759 | ||
ce88decf XG |
5760 | static void kvm_set_mmio_spte_mask(void) |
5761 | { | |
5762 | u64 mask; | |
5763 | int maxphyaddr = boot_cpu_data.x86_phys_bits; | |
5764 | ||
5765 | /* | |
5766 | * Set the reserved bits and the present bit of an paging-structure | |
5767 | * entry to generate page fault with PFER.RSV = 1. | |
5768 | */ | |
885032b9 | 5769 | /* Mask the reserved physical address bits. */ |
d1431483 | 5770 | mask = rsvd_bits(maxphyaddr, 51); |
885032b9 XG |
5771 | |
5772 | /* Bit 62 is always reserved for 32bit host. */ | |
5773 | mask |= 0x3ull << 62; | |
5774 | ||
5775 | /* Set the present bit. */ | |
ce88decf XG |
5776 | mask |= 1ull; |
5777 | ||
5778 | #ifdef CONFIG_X86_64 | |
5779 | /* | |
5780 | * If reserved bit is not supported, clear the present bit to disable | |
5781 | * mmio page fault. | |
5782 | */ | |
5783 | if (maxphyaddr == 52) | |
5784 | mask &= ~1ull; | |
5785 | #endif | |
5786 | ||
5787 | kvm_mmu_set_mmio_spte_mask(mask); | |
5788 | } | |
5789 | ||
16e8d74d MT |
5790 | #ifdef CONFIG_X86_64 |
5791 | static void pvclock_gtod_update_fn(struct work_struct *work) | |
5792 | { | |
d828199e MT |
5793 | struct kvm *kvm; |
5794 | ||
5795 | struct kvm_vcpu *vcpu; | |
5796 | int i; | |
5797 | ||
2f303b74 | 5798 | spin_lock(&kvm_lock); |
d828199e MT |
5799 | list_for_each_entry(kvm, &vm_list, vm_list) |
5800 | kvm_for_each_vcpu(i, vcpu, kvm) | |
105b21bb | 5801 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
d828199e | 5802 | atomic_set(&kvm_guest_has_master_clock, 0); |
2f303b74 | 5803 | spin_unlock(&kvm_lock); |
16e8d74d MT |
5804 | } |
5805 | ||
5806 | static DECLARE_WORK(pvclock_gtod_work, pvclock_gtod_update_fn); | |
5807 | ||
5808 | /* | |
5809 | * Notification about pvclock gtod data update. | |
5810 | */ | |
5811 | static int pvclock_gtod_notify(struct notifier_block *nb, unsigned long unused, | |
5812 | void *priv) | |
5813 | { | |
5814 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
5815 | struct timekeeper *tk = priv; | |
5816 | ||
5817 | update_pvclock_gtod(tk); | |
5818 | ||
5819 | /* disable master clock if host does not trust, or does not | |
5820 | * use, TSC clocksource | |
5821 | */ | |
5822 | if (gtod->clock.vclock_mode != VCLOCK_TSC && | |
5823 | atomic_read(&kvm_guest_has_master_clock) != 0) | |
5824 | queue_work(system_long_wq, &pvclock_gtod_work); | |
5825 | ||
5826 | return 0; | |
5827 | } | |
5828 | ||
5829 | static struct notifier_block pvclock_gtod_notifier = { | |
5830 | .notifier_call = pvclock_gtod_notify, | |
5831 | }; | |
5832 | #endif | |
5833 | ||
f8c16bba | 5834 | int kvm_arch_init(void *opaque) |
043405e1 | 5835 | { |
b820cc0c | 5836 | int r; |
6b61edf7 | 5837 | struct kvm_x86_ops *ops = opaque; |
f8c16bba | 5838 | |
f8c16bba ZX |
5839 | if (kvm_x86_ops) { |
5840 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
5841 | r = -EEXIST; |
5842 | goto out; | |
f8c16bba ZX |
5843 | } |
5844 | ||
5845 | if (!ops->cpu_has_kvm_support()) { | |
5846 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
5847 | r = -EOPNOTSUPP; |
5848 | goto out; | |
f8c16bba ZX |
5849 | } |
5850 | if (ops->disabled_by_bios()) { | |
5851 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
5852 | r = -EOPNOTSUPP; |
5853 | goto out; | |
f8c16bba ZX |
5854 | } |
5855 | ||
013f6a5d MT |
5856 | r = -ENOMEM; |
5857 | shared_msrs = alloc_percpu(struct kvm_shared_msrs); | |
5858 | if (!shared_msrs) { | |
5859 | printk(KERN_ERR "kvm: failed to allocate percpu kvm_shared_msrs\n"); | |
5860 | goto out; | |
5861 | } | |
5862 | ||
97db56ce AK |
5863 | r = kvm_mmu_module_init(); |
5864 | if (r) | |
013f6a5d | 5865 | goto out_free_percpu; |
97db56ce | 5866 | |
ce88decf | 5867 | kvm_set_mmio_spte_mask(); |
97db56ce | 5868 | |
f8c16bba | 5869 | kvm_x86_ops = ops; |
920c8377 | 5870 | |
7b52345e | 5871 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, |
4b12f0de | 5872 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
c8076604 | 5873 | |
b820cc0c | 5874 | kvm_timer_init(); |
c8076604 | 5875 | |
ff9d07a0 ZY |
5876 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
5877 | ||
d366bf7e | 5878 | if (boot_cpu_has(X86_FEATURE_XSAVE)) |
2acf923e DC |
5879 | host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); |
5880 | ||
c5cc421b | 5881 | kvm_lapic_init(); |
16e8d74d MT |
5882 | #ifdef CONFIG_X86_64 |
5883 | pvclock_gtod_register_notifier(&pvclock_gtod_notifier); | |
5884 | #endif | |
5885 | ||
f8c16bba | 5886 | return 0; |
56c6d28a | 5887 | |
013f6a5d MT |
5888 | out_free_percpu: |
5889 | free_percpu(shared_msrs); | |
56c6d28a | 5890 | out: |
56c6d28a | 5891 | return r; |
043405e1 | 5892 | } |
8776e519 | 5893 | |
f8c16bba ZX |
5894 | void kvm_arch_exit(void) |
5895 | { | |
ff9d07a0 ZY |
5896 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
5897 | ||
888d256e JK |
5898 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
5899 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
5900 | CPUFREQ_TRANSITION_NOTIFIER); | |
8cfdc000 | 5901 | unregister_hotcpu_notifier(&kvmclock_cpu_notifier_block); |
16e8d74d MT |
5902 | #ifdef CONFIG_X86_64 |
5903 | pvclock_gtod_unregister_notifier(&pvclock_gtod_notifier); | |
5904 | #endif | |
f8c16bba | 5905 | kvm_x86_ops = NULL; |
56c6d28a | 5906 | kvm_mmu_module_exit(); |
013f6a5d | 5907 | free_percpu(shared_msrs); |
56c6d28a | 5908 | } |
f8c16bba | 5909 | |
5cb56059 | 5910 | int kvm_vcpu_halt(struct kvm_vcpu *vcpu) |
8776e519 HB |
5911 | { |
5912 | ++vcpu->stat.halt_exits; | |
35754c98 | 5913 | if (lapic_in_kernel(vcpu)) { |
a4535290 | 5914 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
5915 | return 1; |
5916 | } else { | |
5917 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
5918 | return 0; | |
5919 | } | |
5920 | } | |
5cb56059 JS |
5921 | EXPORT_SYMBOL_GPL(kvm_vcpu_halt); |
5922 | ||
5923 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) | |
5924 | { | |
5925 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
5926 | return kvm_vcpu_halt(vcpu); | |
5927 | } | |
8776e519 HB |
5928 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); |
5929 | ||
6aef266c SV |
5930 | /* |
5931 | * kvm_pv_kick_cpu_op: Kick a vcpu. | |
5932 | * | |
5933 | * @apicid - apicid of vcpu to be kicked. | |
5934 | */ | |
5935 | static void kvm_pv_kick_cpu_op(struct kvm *kvm, unsigned long flags, int apicid) | |
5936 | { | |
24d2166b | 5937 | struct kvm_lapic_irq lapic_irq; |
6aef266c | 5938 | |
24d2166b R |
5939 | lapic_irq.shorthand = 0; |
5940 | lapic_irq.dest_mode = 0; | |
5941 | lapic_irq.dest_id = apicid; | |
93bbf0b8 | 5942 | lapic_irq.msi_redir_hint = false; |
6aef266c | 5943 | |
24d2166b | 5944 | lapic_irq.delivery_mode = APIC_DM_REMRD; |
795a149e | 5945 | kvm_irq_delivery_to_apic(kvm, NULL, &lapic_irq, NULL); |
6aef266c SV |
5946 | } |
5947 | ||
d62caabb AS |
5948 | void kvm_vcpu_deactivate_apicv(struct kvm_vcpu *vcpu) |
5949 | { | |
5950 | vcpu->arch.apicv_active = false; | |
5951 | kvm_x86_ops->refresh_apicv_exec_ctrl(vcpu); | |
5952 | } | |
5953 | ||
8776e519 HB |
5954 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
5955 | { | |
5956 | unsigned long nr, a0, a1, a2, a3, ret; | |
a449c7aa | 5957 | int op_64_bit, r = 1; |
8776e519 | 5958 | |
5cb56059 JS |
5959 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
5960 | ||
55cd8e5a GN |
5961 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
5962 | return kvm_hv_hypercall(vcpu); | |
5963 | ||
5fdbf976 MT |
5964 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
5965 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
5966 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5967 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
5968 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 5969 | |
229456fc | 5970 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 5971 | |
a449c7aa NA |
5972 | op_64_bit = is_64_bit_mode(vcpu); |
5973 | if (!op_64_bit) { | |
8776e519 HB |
5974 | nr &= 0xFFFFFFFF; |
5975 | a0 &= 0xFFFFFFFF; | |
5976 | a1 &= 0xFFFFFFFF; | |
5977 | a2 &= 0xFFFFFFFF; | |
5978 | a3 &= 0xFFFFFFFF; | |
5979 | } | |
5980 | ||
07708c4a JK |
5981 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
5982 | ret = -KVM_EPERM; | |
5983 | goto out; | |
5984 | } | |
5985 | ||
8776e519 | 5986 | switch (nr) { |
b93463aa AK |
5987 | case KVM_HC_VAPIC_POLL_IRQ: |
5988 | ret = 0; | |
5989 | break; | |
6aef266c SV |
5990 | case KVM_HC_KICK_CPU: |
5991 | kvm_pv_kick_cpu_op(vcpu->kvm, a0, a1); | |
5992 | ret = 0; | |
5993 | break; | |
8776e519 HB |
5994 | default: |
5995 | ret = -KVM_ENOSYS; | |
5996 | break; | |
5997 | } | |
07708c4a | 5998 | out: |
a449c7aa NA |
5999 | if (!op_64_bit) |
6000 | ret = (u32)ret; | |
5fdbf976 | 6001 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 6002 | ++vcpu->stat.hypercalls; |
2f333bcb | 6003 | return r; |
8776e519 HB |
6004 | } |
6005 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
6006 | ||
b6785def | 6007 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) |
8776e519 | 6008 | { |
d6aa1000 | 6009 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
8776e519 | 6010 | char instruction[3]; |
5fdbf976 | 6011 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 6012 | |
8776e519 | 6013 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 6014 | |
9d74191a | 6015 | return emulator_write_emulated(ctxt, rip, instruction, 3, NULL); |
8776e519 HB |
6016 | } |
6017 | ||
851ba692 | 6018 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 6019 | { |
782d422b MG |
6020 | return vcpu->run->request_interrupt_window && |
6021 | likely(!pic_in_kernel(vcpu->kvm)); | |
b6c7a5dc HB |
6022 | } |
6023 | ||
851ba692 | 6024 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 6025 | { |
851ba692 AK |
6026 | struct kvm_run *kvm_run = vcpu->run; |
6027 | ||
91586a3b | 6028 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
f077825a | 6029 | kvm_run->flags = is_smm(vcpu) ? KVM_RUN_X86_SMM : 0; |
2d3ad1f4 | 6030 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 6031 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
127a457a MG |
6032 | kvm_run->ready_for_interrupt_injection = |
6033 | pic_in_kernel(vcpu->kvm) || | |
782d422b | 6034 | kvm_vcpu_ready_for_interrupt_injection(vcpu); |
b6c7a5dc HB |
6035 | } |
6036 | ||
95ba8273 GN |
6037 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
6038 | { | |
6039 | int max_irr, tpr; | |
6040 | ||
6041 | if (!kvm_x86_ops->update_cr8_intercept) | |
6042 | return; | |
6043 | ||
bce87cce | 6044 | if (!lapic_in_kernel(vcpu)) |
88c808fd AK |
6045 | return; |
6046 | ||
d62caabb AS |
6047 | if (vcpu->arch.apicv_active) |
6048 | return; | |
6049 | ||
8db3baa2 GN |
6050 | if (!vcpu->arch.apic->vapic_addr) |
6051 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
6052 | else | |
6053 | max_irr = -1; | |
95ba8273 GN |
6054 | |
6055 | if (max_irr != -1) | |
6056 | max_irr >>= 4; | |
6057 | ||
6058 | tpr = kvm_lapic_get_cr8(vcpu); | |
6059 | ||
6060 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
6061 | } | |
6062 | ||
b6b8a145 | 6063 | static int inject_pending_event(struct kvm_vcpu *vcpu, bool req_int_win) |
95ba8273 | 6064 | { |
b6b8a145 JK |
6065 | int r; |
6066 | ||
95ba8273 | 6067 | /* try to reinject previous events if any */ |
b59bb7bd | 6068 | if (vcpu->arch.exception.pending) { |
5c1c85d0 AK |
6069 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
6070 | vcpu->arch.exception.has_error_code, | |
6071 | vcpu->arch.exception.error_code); | |
d6e8c854 NA |
6072 | |
6073 | if (exception_type(vcpu->arch.exception.nr) == EXCPT_FAULT) | |
6074 | __kvm_set_rflags(vcpu, kvm_get_rflags(vcpu) | | |
6075 | X86_EFLAGS_RF); | |
6076 | ||
6bdf0662 NA |
6077 | if (vcpu->arch.exception.nr == DB_VECTOR && |
6078 | (vcpu->arch.dr7 & DR7_GD)) { | |
6079 | vcpu->arch.dr7 &= ~DR7_GD; | |
6080 | kvm_update_dr7(vcpu); | |
6081 | } | |
6082 | ||
b59bb7bd GN |
6083 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
6084 | vcpu->arch.exception.has_error_code, | |
ce7ddec4 JR |
6085 | vcpu->arch.exception.error_code, |
6086 | vcpu->arch.exception.reinject); | |
b6b8a145 | 6087 | return 0; |
b59bb7bd GN |
6088 | } |
6089 | ||
95ba8273 GN |
6090 | if (vcpu->arch.nmi_injected) { |
6091 | kvm_x86_ops->set_nmi(vcpu); | |
b6b8a145 | 6092 | return 0; |
95ba8273 GN |
6093 | } |
6094 | ||
6095 | if (vcpu->arch.interrupt.pending) { | |
66fd3f7f | 6096 | kvm_x86_ops->set_irq(vcpu); |
b6b8a145 JK |
6097 | return 0; |
6098 | } | |
6099 | ||
6100 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { | |
6101 | r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); | |
6102 | if (r != 0) | |
6103 | return r; | |
95ba8273 GN |
6104 | } |
6105 | ||
6106 | /* try to inject new event if pending */ | |
c43203ca PB |
6107 | if (vcpu->arch.smi_pending && !is_smm(vcpu)) { |
6108 | vcpu->arch.smi_pending = false; | |
ee2cd4b7 | 6109 | enter_smm(vcpu); |
c43203ca | 6110 | } else if (vcpu->arch.nmi_pending && kvm_x86_ops->nmi_allowed(vcpu)) { |
321c5658 YS |
6111 | --vcpu->arch.nmi_pending; |
6112 | vcpu->arch.nmi_injected = true; | |
6113 | kvm_x86_ops->set_nmi(vcpu); | |
c7c9c56c | 6114 | } else if (kvm_cpu_has_injectable_intr(vcpu)) { |
9242b5b6 BD |
6115 | /* |
6116 | * Because interrupts can be injected asynchronously, we are | |
6117 | * calling check_nested_events again here to avoid a race condition. | |
6118 | * See https://lkml.org/lkml/2014/7/2/60 for discussion about this | |
6119 | * proposal and current concerns. Perhaps we should be setting | |
6120 | * KVM_REQ_EVENT only on certain events and not unconditionally? | |
6121 | */ | |
6122 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { | |
6123 | r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); | |
6124 | if (r != 0) | |
6125 | return r; | |
6126 | } | |
95ba8273 | 6127 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { |
66fd3f7f GN |
6128 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
6129 | false); | |
6130 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
6131 | } |
6132 | } | |
ee2cd4b7 | 6133 | |
b6b8a145 | 6134 | return 0; |
95ba8273 GN |
6135 | } |
6136 | ||
7460fb4a AK |
6137 | static void process_nmi(struct kvm_vcpu *vcpu) |
6138 | { | |
6139 | unsigned limit = 2; | |
6140 | ||
6141 | /* | |
6142 | * x86 is limited to one NMI running, and one NMI pending after it. | |
6143 | * If an NMI is already in progress, limit further NMIs to just one. | |
6144 | * Otherwise, allow two (and we'll inject the first one immediately). | |
6145 | */ | |
6146 | if (kvm_x86_ops->get_nmi_mask(vcpu) || vcpu->arch.nmi_injected) | |
6147 | limit = 1; | |
6148 | ||
6149 | vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0); | |
6150 | vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit); | |
6151 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
6152 | } | |
6153 | ||
660a5d51 PB |
6154 | #define put_smstate(type, buf, offset, val) \ |
6155 | *(type *)((buf) + (offset) - 0x7e00) = val | |
6156 | ||
ee2cd4b7 | 6157 | static u32 enter_smm_get_segment_flags(struct kvm_segment *seg) |
660a5d51 PB |
6158 | { |
6159 | u32 flags = 0; | |
6160 | flags |= seg->g << 23; | |
6161 | flags |= seg->db << 22; | |
6162 | flags |= seg->l << 21; | |
6163 | flags |= seg->avl << 20; | |
6164 | flags |= seg->present << 15; | |
6165 | flags |= seg->dpl << 13; | |
6166 | flags |= seg->s << 12; | |
6167 | flags |= seg->type << 8; | |
6168 | return flags; | |
6169 | } | |
6170 | ||
ee2cd4b7 | 6171 | static void enter_smm_save_seg_32(struct kvm_vcpu *vcpu, char *buf, int n) |
660a5d51 PB |
6172 | { |
6173 | struct kvm_segment seg; | |
6174 | int offset; | |
6175 | ||
6176 | kvm_get_segment(vcpu, &seg, n); | |
6177 | put_smstate(u32, buf, 0x7fa8 + n * 4, seg.selector); | |
6178 | ||
6179 | if (n < 3) | |
6180 | offset = 0x7f84 + n * 12; | |
6181 | else | |
6182 | offset = 0x7f2c + (n - 3) * 12; | |
6183 | ||
6184 | put_smstate(u32, buf, offset + 8, seg.base); | |
6185 | put_smstate(u32, buf, offset + 4, seg.limit); | |
ee2cd4b7 | 6186 | put_smstate(u32, buf, offset, enter_smm_get_segment_flags(&seg)); |
660a5d51 PB |
6187 | } |
6188 | ||
efbb288a | 6189 | #ifdef CONFIG_X86_64 |
ee2cd4b7 | 6190 | static void enter_smm_save_seg_64(struct kvm_vcpu *vcpu, char *buf, int n) |
660a5d51 PB |
6191 | { |
6192 | struct kvm_segment seg; | |
6193 | int offset; | |
6194 | u16 flags; | |
6195 | ||
6196 | kvm_get_segment(vcpu, &seg, n); | |
6197 | offset = 0x7e00 + n * 16; | |
6198 | ||
ee2cd4b7 | 6199 | flags = enter_smm_get_segment_flags(&seg) >> 8; |
660a5d51 PB |
6200 | put_smstate(u16, buf, offset, seg.selector); |
6201 | put_smstate(u16, buf, offset + 2, flags); | |
6202 | put_smstate(u32, buf, offset + 4, seg.limit); | |
6203 | put_smstate(u64, buf, offset + 8, seg.base); | |
6204 | } | |
efbb288a | 6205 | #endif |
660a5d51 | 6206 | |
ee2cd4b7 | 6207 | static void enter_smm_save_state_32(struct kvm_vcpu *vcpu, char *buf) |
660a5d51 PB |
6208 | { |
6209 | struct desc_ptr dt; | |
6210 | struct kvm_segment seg; | |
6211 | unsigned long val; | |
6212 | int i; | |
6213 | ||
6214 | put_smstate(u32, buf, 0x7ffc, kvm_read_cr0(vcpu)); | |
6215 | put_smstate(u32, buf, 0x7ff8, kvm_read_cr3(vcpu)); | |
6216 | put_smstate(u32, buf, 0x7ff4, kvm_get_rflags(vcpu)); | |
6217 | put_smstate(u32, buf, 0x7ff0, kvm_rip_read(vcpu)); | |
6218 | ||
6219 | for (i = 0; i < 8; i++) | |
6220 | put_smstate(u32, buf, 0x7fd0 + i * 4, kvm_register_read(vcpu, i)); | |
6221 | ||
6222 | kvm_get_dr(vcpu, 6, &val); | |
6223 | put_smstate(u32, buf, 0x7fcc, (u32)val); | |
6224 | kvm_get_dr(vcpu, 7, &val); | |
6225 | put_smstate(u32, buf, 0x7fc8, (u32)val); | |
6226 | ||
6227 | kvm_get_segment(vcpu, &seg, VCPU_SREG_TR); | |
6228 | put_smstate(u32, buf, 0x7fc4, seg.selector); | |
6229 | put_smstate(u32, buf, 0x7f64, seg.base); | |
6230 | put_smstate(u32, buf, 0x7f60, seg.limit); | |
ee2cd4b7 | 6231 | put_smstate(u32, buf, 0x7f5c, enter_smm_get_segment_flags(&seg)); |
660a5d51 PB |
6232 | |
6233 | kvm_get_segment(vcpu, &seg, VCPU_SREG_LDTR); | |
6234 | put_smstate(u32, buf, 0x7fc0, seg.selector); | |
6235 | put_smstate(u32, buf, 0x7f80, seg.base); | |
6236 | put_smstate(u32, buf, 0x7f7c, seg.limit); | |
ee2cd4b7 | 6237 | put_smstate(u32, buf, 0x7f78, enter_smm_get_segment_flags(&seg)); |
660a5d51 PB |
6238 | |
6239 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
6240 | put_smstate(u32, buf, 0x7f74, dt.address); | |
6241 | put_smstate(u32, buf, 0x7f70, dt.size); | |
6242 | ||
6243 | kvm_x86_ops->get_idt(vcpu, &dt); | |
6244 | put_smstate(u32, buf, 0x7f58, dt.address); | |
6245 | put_smstate(u32, buf, 0x7f54, dt.size); | |
6246 | ||
6247 | for (i = 0; i < 6; i++) | |
ee2cd4b7 | 6248 | enter_smm_save_seg_32(vcpu, buf, i); |
660a5d51 PB |
6249 | |
6250 | put_smstate(u32, buf, 0x7f14, kvm_read_cr4(vcpu)); | |
6251 | ||
6252 | /* revision id */ | |
6253 | put_smstate(u32, buf, 0x7efc, 0x00020000); | |
6254 | put_smstate(u32, buf, 0x7ef8, vcpu->arch.smbase); | |
6255 | } | |
6256 | ||
ee2cd4b7 | 6257 | static void enter_smm_save_state_64(struct kvm_vcpu *vcpu, char *buf) |
660a5d51 PB |
6258 | { |
6259 | #ifdef CONFIG_X86_64 | |
6260 | struct desc_ptr dt; | |
6261 | struct kvm_segment seg; | |
6262 | unsigned long val; | |
6263 | int i; | |
6264 | ||
6265 | for (i = 0; i < 16; i++) | |
6266 | put_smstate(u64, buf, 0x7ff8 - i * 8, kvm_register_read(vcpu, i)); | |
6267 | ||
6268 | put_smstate(u64, buf, 0x7f78, kvm_rip_read(vcpu)); | |
6269 | put_smstate(u32, buf, 0x7f70, kvm_get_rflags(vcpu)); | |
6270 | ||
6271 | kvm_get_dr(vcpu, 6, &val); | |
6272 | put_smstate(u64, buf, 0x7f68, val); | |
6273 | kvm_get_dr(vcpu, 7, &val); | |
6274 | put_smstate(u64, buf, 0x7f60, val); | |
6275 | ||
6276 | put_smstate(u64, buf, 0x7f58, kvm_read_cr0(vcpu)); | |
6277 | put_smstate(u64, buf, 0x7f50, kvm_read_cr3(vcpu)); | |
6278 | put_smstate(u64, buf, 0x7f48, kvm_read_cr4(vcpu)); | |
6279 | ||
6280 | put_smstate(u32, buf, 0x7f00, vcpu->arch.smbase); | |
6281 | ||
6282 | /* revision id */ | |
6283 | put_smstate(u32, buf, 0x7efc, 0x00020064); | |
6284 | ||
6285 | put_smstate(u64, buf, 0x7ed0, vcpu->arch.efer); | |
6286 | ||
6287 | kvm_get_segment(vcpu, &seg, VCPU_SREG_TR); | |
6288 | put_smstate(u16, buf, 0x7e90, seg.selector); | |
ee2cd4b7 | 6289 | put_smstate(u16, buf, 0x7e92, enter_smm_get_segment_flags(&seg) >> 8); |
660a5d51 PB |
6290 | put_smstate(u32, buf, 0x7e94, seg.limit); |
6291 | put_smstate(u64, buf, 0x7e98, seg.base); | |
6292 | ||
6293 | kvm_x86_ops->get_idt(vcpu, &dt); | |
6294 | put_smstate(u32, buf, 0x7e84, dt.size); | |
6295 | put_smstate(u64, buf, 0x7e88, dt.address); | |
6296 | ||
6297 | kvm_get_segment(vcpu, &seg, VCPU_SREG_LDTR); | |
6298 | put_smstate(u16, buf, 0x7e70, seg.selector); | |
ee2cd4b7 | 6299 | put_smstate(u16, buf, 0x7e72, enter_smm_get_segment_flags(&seg) >> 8); |
660a5d51 PB |
6300 | put_smstate(u32, buf, 0x7e74, seg.limit); |
6301 | put_smstate(u64, buf, 0x7e78, seg.base); | |
6302 | ||
6303 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
6304 | put_smstate(u32, buf, 0x7e64, dt.size); | |
6305 | put_smstate(u64, buf, 0x7e68, dt.address); | |
6306 | ||
6307 | for (i = 0; i < 6; i++) | |
ee2cd4b7 | 6308 | enter_smm_save_seg_64(vcpu, buf, i); |
660a5d51 PB |
6309 | #else |
6310 | WARN_ON_ONCE(1); | |
6311 | #endif | |
6312 | } | |
6313 | ||
ee2cd4b7 | 6314 | static void enter_smm(struct kvm_vcpu *vcpu) |
64d60670 | 6315 | { |
660a5d51 | 6316 | struct kvm_segment cs, ds; |
18c3626e | 6317 | struct desc_ptr dt; |
660a5d51 PB |
6318 | char buf[512]; |
6319 | u32 cr0; | |
6320 | ||
660a5d51 PB |
6321 | trace_kvm_enter_smm(vcpu->vcpu_id, vcpu->arch.smbase, true); |
6322 | vcpu->arch.hflags |= HF_SMM_MASK; | |
6323 | memset(buf, 0, 512); | |
6324 | if (guest_cpuid_has_longmode(vcpu)) | |
ee2cd4b7 | 6325 | enter_smm_save_state_64(vcpu, buf); |
660a5d51 | 6326 | else |
ee2cd4b7 | 6327 | enter_smm_save_state_32(vcpu, buf); |
660a5d51 | 6328 | |
54bf36aa | 6329 | kvm_vcpu_write_guest(vcpu, vcpu->arch.smbase + 0xfe00, buf, sizeof(buf)); |
660a5d51 PB |
6330 | |
6331 | if (kvm_x86_ops->get_nmi_mask(vcpu)) | |
6332 | vcpu->arch.hflags |= HF_SMM_INSIDE_NMI_MASK; | |
6333 | else | |
6334 | kvm_x86_ops->set_nmi_mask(vcpu, true); | |
6335 | ||
6336 | kvm_set_rflags(vcpu, X86_EFLAGS_FIXED); | |
6337 | kvm_rip_write(vcpu, 0x8000); | |
6338 | ||
6339 | cr0 = vcpu->arch.cr0 & ~(X86_CR0_PE | X86_CR0_EM | X86_CR0_TS | X86_CR0_PG); | |
6340 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
6341 | vcpu->arch.cr0 = cr0; | |
6342 | ||
6343 | kvm_x86_ops->set_cr4(vcpu, 0); | |
6344 | ||
18c3626e PB |
6345 | /* Undocumented: IDT limit is set to zero on entry to SMM. */ |
6346 | dt.address = dt.size = 0; | |
6347 | kvm_x86_ops->set_idt(vcpu, &dt); | |
6348 | ||
660a5d51 PB |
6349 | __kvm_set_dr(vcpu, 7, DR7_FIXED_1); |
6350 | ||
6351 | cs.selector = (vcpu->arch.smbase >> 4) & 0xffff; | |
6352 | cs.base = vcpu->arch.smbase; | |
6353 | ||
6354 | ds.selector = 0; | |
6355 | ds.base = 0; | |
6356 | ||
6357 | cs.limit = ds.limit = 0xffffffff; | |
6358 | cs.type = ds.type = 0x3; | |
6359 | cs.dpl = ds.dpl = 0; | |
6360 | cs.db = ds.db = 0; | |
6361 | cs.s = ds.s = 1; | |
6362 | cs.l = ds.l = 0; | |
6363 | cs.g = ds.g = 1; | |
6364 | cs.avl = ds.avl = 0; | |
6365 | cs.present = ds.present = 1; | |
6366 | cs.unusable = ds.unusable = 0; | |
6367 | cs.padding = ds.padding = 0; | |
6368 | ||
6369 | kvm_set_segment(vcpu, &cs, VCPU_SREG_CS); | |
6370 | kvm_set_segment(vcpu, &ds, VCPU_SREG_DS); | |
6371 | kvm_set_segment(vcpu, &ds, VCPU_SREG_ES); | |
6372 | kvm_set_segment(vcpu, &ds, VCPU_SREG_FS); | |
6373 | kvm_set_segment(vcpu, &ds, VCPU_SREG_GS); | |
6374 | kvm_set_segment(vcpu, &ds, VCPU_SREG_SS); | |
6375 | ||
6376 | if (guest_cpuid_has_longmode(vcpu)) | |
6377 | kvm_x86_ops->set_efer(vcpu, 0); | |
6378 | ||
6379 | kvm_update_cpuid(vcpu); | |
6380 | kvm_mmu_reset_context(vcpu); | |
64d60670 PB |
6381 | } |
6382 | ||
ee2cd4b7 | 6383 | static void process_smi(struct kvm_vcpu *vcpu) |
c43203ca PB |
6384 | { |
6385 | vcpu->arch.smi_pending = true; | |
6386 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
6387 | } | |
6388 | ||
2860c4b1 PB |
6389 | void kvm_make_scan_ioapic_request(struct kvm *kvm) |
6390 | { | |
6391 | kvm_make_all_cpus_request(kvm, KVM_REQ_SCAN_IOAPIC); | |
6392 | } | |
6393 | ||
3d81bc7e | 6394 | static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu) |
c7c9c56c | 6395 | { |
5c919412 AS |
6396 | u64 eoi_exit_bitmap[4]; |
6397 | ||
3d81bc7e YZ |
6398 | if (!kvm_apic_hw_enabled(vcpu->arch.apic)) |
6399 | return; | |
c7c9c56c | 6400 | |
6308630b | 6401 | bitmap_zero(vcpu->arch.ioapic_handled_vectors, 256); |
c7c9c56c | 6402 | |
b053b2ae | 6403 | if (irqchip_split(vcpu->kvm)) |
6308630b | 6404 | kvm_scan_ioapic_routes(vcpu, vcpu->arch.ioapic_handled_vectors); |
db2bdcbb | 6405 | else { |
d62caabb AS |
6406 | if (vcpu->arch.apicv_active) |
6407 | kvm_x86_ops->sync_pir_to_irr(vcpu); | |
6308630b | 6408 | kvm_ioapic_scan_entry(vcpu, vcpu->arch.ioapic_handled_vectors); |
db2bdcbb | 6409 | } |
5c919412 AS |
6410 | bitmap_or((ulong *)eoi_exit_bitmap, vcpu->arch.ioapic_handled_vectors, |
6411 | vcpu_to_synic(vcpu)->vec_bitmap, 256); | |
6412 | kvm_x86_ops->load_eoi_exitmap(vcpu, eoi_exit_bitmap); | |
c7c9c56c YZ |
6413 | } |
6414 | ||
a70656b6 RK |
6415 | static void kvm_vcpu_flush_tlb(struct kvm_vcpu *vcpu) |
6416 | { | |
6417 | ++vcpu->stat.tlb_flush; | |
6418 | kvm_x86_ops->tlb_flush(vcpu); | |
6419 | } | |
6420 | ||
4256f43f TC |
6421 | void kvm_vcpu_reload_apic_access_page(struct kvm_vcpu *vcpu) |
6422 | { | |
c24ae0dc TC |
6423 | struct page *page = NULL; |
6424 | ||
35754c98 | 6425 | if (!lapic_in_kernel(vcpu)) |
f439ed27 PB |
6426 | return; |
6427 | ||
4256f43f TC |
6428 | if (!kvm_x86_ops->set_apic_access_page_addr) |
6429 | return; | |
6430 | ||
c24ae0dc | 6431 | page = gfn_to_page(vcpu->kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT); |
e8fd5e9e AA |
6432 | if (is_error_page(page)) |
6433 | return; | |
c24ae0dc TC |
6434 | kvm_x86_ops->set_apic_access_page_addr(vcpu, page_to_phys(page)); |
6435 | ||
6436 | /* | |
6437 | * Do not pin apic access page in memory, the MMU notifier | |
6438 | * will call us again if it is migrated or swapped out. | |
6439 | */ | |
6440 | put_page(page); | |
4256f43f TC |
6441 | } |
6442 | EXPORT_SYMBOL_GPL(kvm_vcpu_reload_apic_access_page); | |
6443 | ||
fe71557a TC |
6444 | void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm, |
6445 | unsigned long address) | |
6446 | { | |
c24ae0dc TC |
6447 | /* |
6448 | * The physical address of apic access page is stored in the VMCS. | |
6449 | * Update it when it becomes invalid. | |
6450 | */ | |
6451 | if (address == gfn_to_hva(kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT)) | |
6452 | kvm_make_all_cpus_request(kvm, KVM_REQ_APIC_PAGE_RELOAD); | |
fe71557a TC |
6453 | } |
6454 | ||
9357d939 | 6455 | /* |
362c698f | 6456 | * Returns 1 to let vcpu_run() continue the guest execution loop without |
9357d939 TY |
6457 | * exiting to the userspace. Otherwise, the value will be returned to the |
6458 | * userspace. | |
6459 | */ | |
851ba692 | 6460 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
6461 | { |
6462 | int r; | |
62a193ed MG |
6463 | bool req_int_win = |
6464 | dm_request_for_irq_injection(vcpu) && | |
6465 | kvm_cpu_accept_dm_intr(vcpu); | |
6466 | ||
730dca42 | 6467 | bool req_immediate_exit = false; |
b6c7a5dc | 6468 | |
3e007509 | 6469 | if (vcpu->requests) { |
a8eeb04a | 6470 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) |
2e53d63a | 6471 | kvm_mmu_unload(vcpu); |
a8eeb04a | 6472 | if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu)) |
2f599714 | 6473 | __kvm_migrate_timers(vcpu); |
d828199e MT |
6474 | if (kvm_check_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu)) |
6475 | kvm_gen_update_masterclock(vcpu->kvm); | |
0061d53d MT |
6476 | if (kvm_check_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu)) |
6477 | kvm_gen_kvmclock_update(vcpu); | |
34c238a1 ZA |
6478 | if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) { |
6479 | r = kvm_guest_time_update(vcpu); | |
8cfdc000 ZA |
6480 | if (unlikely(r)) |
6481 | goto out; | |
6482 | } | |
a8eeb04a | 6483 | if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu)) |
4731d4c7 | 6484 | kvm_mmu_sync_roots(vcpu); |
a8eeb04a | 6485 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) |
a70656b6 | 6486 | kvm_vcpu_flush_tlb(vcpu); |
a8eeb04a | 6487 | if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) { |
851ba692 | 6488 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
6489 | r = 0; |
6490 | goto out; | |
6491 | } | |
a8eeb04a | 6492 | if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) { |
851ba692 | 6493 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
71c4dfaf JR |
6494 | r = 0; |
6495 | goto out; | |
6496 | } | |
a8eeb04a | 6497 | if (kvm_check_request(KVM_REQ_DEACTIVATE_FPU, vcpu)) { |
02daab21 AK |
6498 | vcpu->fpu_active = 0; |
6499 | kvm_x86_ops->fpu_deactivate(vcpu); | |
6500 | } | |
af585b92 GN |
6501 | if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) { |
6502 | /* Page is swapped out. Do synthetic halt */ | |
6503 | vcpu->arch.apf.halted = true; | |
6504 | r = 1; | |
6505 | goto out; | |
6506 | } | |
c9aaa895 GC |
6507 | if (kvm_check_request(KVM_REQ_STEAL_UPDATE, vcpu)) |
6508 | record_steal_time(vcpu); | |
64d60670 | 6509 | if (kvm_check_request(KVM_REQ_SMI, vcpu)) |
ee2cd4b7 | 6510 | process_smi(vcpu); |
7460fb4a AK |
6511 | if (kvm_check_request(KVM_REQ_NMI, vcpu)) |
6512 | process_nmi(vcpu); | |
f5132b01 | 6513 | if (kvm_check_request(KVM_REQ_PMU, vcpu)) |
c6702c9d | 6514 | kvm_pmu_handle_event(vcpu); |
f5132b01 | 6515 | if (kvm_check_request(KVM_REQ_PMI, vcpu)) |
c6702c9d | 6516 | kvm_pmu_deliver_pmi(vcpu); |
7543a635 SR |
6517 | if (kvm_check_request(KVM_REQ_IOAPIC_EOI_EXIT, vcpu)) { |
6518 | BUG_ON(vcpu->arch.pending_ioapic_eoi > 255); | |
6519 | if (test_bit(vcpu->arch.pending_ioapic_eoi, | |
6308630b | 6520 | vcpu->arch.ioapic_handled_vectors)) { |
7543a635 SR |
6521 | vcpu->run->exit_reason = KVM_EXIT_IOAPIC_EOI; |
6522 | vcpu->run->eoi.vector = | |
6523 | vcpu->arch.pending_ioapic_eoi; | |
6524 | r = 0; | |
6525 | goto out; | |
6526 | } | |
6527 | } | |
3d81bc7e YZ |
6528 | if (kvm_check_request(KVM_REQ_SCAN_IOAPIC, vcpu)) |
6529 | vcpu_scan_ioapic(vcpu); | |
4256f43f TC |
6530 | if (kvm_check_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu)) |
6531 | kvm_vcpu_reload_apic_access_page(vcpu); | |
2ce79189 AS |
6532 | if (kvm_check_request(KVM_REQ_HV_CRASH, vcpu)) { |
6533 | vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; | |
6534 | vcpu->run->system_event.type = KVM_SYSTEM_EVENT_CRASH; | |
6535 | r = 0; | |
6536 | goto out; | |
6537 | } | |
e516cebb AS |
6538 | if (kvm_check_request(KVM_REQ_HV_RESET, vcpu)) { |
6539 | vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; | |
6540 | vcpu->run->system_event.type = KVM_SYSTEM_EVENT_RESET; | |
6541 | r = 0; | |
6542 | goto out; | |
6543 | } | |
db397571 AS |
6544 | if (kvm_check_request(KVM_REQ_HV_EXIT, vcpu)) { |
6545 | vcpu->run->exit_reason = KVM_EXIT_HYPERV; | |
6546 | vcpu->run->hyperv = vcpu->arch.hyperv.exit; | |
6547 | r = 0; | |
6548 | goto out; | |
6549 | } | |
f3b138c5 AS |
6550 | |
6551 | /* | |
6552 | * KVM_REQ_HV_STIMER has to be processed after | |
6553 | * KVM_REQ_CLOCK_UPDATE, because Hyper-V SynIC timers | |
6554 | * depend on the guest clock being up-to-date | |
6555 | */ | |
1f4b34f8 AS |
6556 | if (kvm_check_request(KVM_REQ_HV_STIMER, vcpu)) |
6557 | kvm_hv_process_stimers(vcpu); | |
2f52d58c | 6558 | } |
b93463aa | 6559 | |
bf9f6ac8 FW |
6560 | /* |
6561 | * KVM_REQ_EVENT is not set when posted interrupts are set by | |
6562 | * VT-d hardware, so we have to update RVI unconditionally. | |
6563 | */ | |
6564 | if (kvm_lapic_enabled(vcpu)) { | |
6565 | /* | |
6566 | * Update architecture specific hints for APIC | |
6567 | * virtual interrupt delivery. | |
6568 | */ | |
d62caabb | 6569 | if (vcpu->arch.apicv_active) |
bf9f6ac8 FW |
6570 | kvm_x86_ops->hwapic_irr_update(vcpu, |
6571 | kvm_lapic_find_highest_irr(vcpu)); | |
2f52d58c | 6572 | } |
b93463aa | 6573 | |
b463a6f7 | 6574 | if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { |
66450a21 JK |
6575 | kvm_apic_accept_events(vcpu); |
6576 | if (vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { | |
6577 | r = 1; | |
6578 | goto out; | |
6579 | } | |
6580 | ||
b6b8a145 JK |
6581 | if (inject_pending_event(vcpu, req_int_win) != 0) |
6582 | req_immediate_exit = true; | |
321c5658 | 6583 | else { |
c43203ca PB |
6584 | /* Enable NMI/IRQ window open exits if needed. |
6585 | * | |
6586 | * SMIs have two cases: 1) they can be nested, and | |
6587 | * then there is nothing to do here because RSM will | |
6588 | * cause a vmexit anyway; 2) or the SMI can be pending | |
6589 | * because inject_pending_event has completed the | |
6590 | * injection of an IRQ or NMI from the previous vmexit, | |
6591 | * and then we request an immediate exit to inject the SMI. | |
6592 | */ | |
6593 | if (vcpu->arch.smi_pending && !is_smm(vcpu)) | |
6594 | req_immediate_exit = true; | |
321c5658 YS |
6595 | if (vcpu->arch.nmi_pending) |
6596 | kvm_x86_ops->enable_nmi_window(vcpu); | |
6597 | if (kvm_cpu_has_injectable_intr(vcpu) || req_int_win) | |
6598 | kvm_x86_ops->enable_irq_window(vcpu); | |
6599 | } | |
b463a6f7 AK |
6600 | |
6601 | if (kvm_lapic_enabled(vcpu)) { | |
6602 | update_cr8_intercept(vcpu); | |
6603 | kvm_lapic_sync_to_vapic(vcpu); | |
6604 | } | |
6605 | } | |
6606 | ||
d8368af8 AK |
6607 | r = kvm_mmu_reload(vcpu); |
6608 | if (unlikely(r)) { | |
d905c069 | 6609 | goto cancel_injection; |
d8368af8 AK |
6610 | } |
6611 | ||
b6c7a5dc HB |
6612 | preempt_disable(); |
6613 | ||
6614 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2608d7a1 AK |
6615 | if (vcpu->fpu_active) |
6616 | kvm_load_guest_fpu(vcpu); | |
6b7e2d09 XG |
6617 | vcpu->mode = IN_GUEST_MODE; |
6618 | ||
01b71917 MT |
6619 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
6620 | ||
0f127d12 LT |
6621 | /* |
6622 | * We should set ->mode before check ->requests, | |
6623 | * Please see the comment in kvm_make_all_cpus_request. | |
6624 | * This also orders the write to mode from any reads | |
6625 | * to the page tables done while the VCPU is running. | |
6626 | * Please see the comment in kvm_flush_remote_tlbs. | |
6b7e2d09 | 6627 | */ |
01b71917 | 6628 | smp_mb__after_srcu_read_unlock(); |
b6c7a5dc | 6629 | |
d94e1dc9 | 6630 | local_irq_disable(); |
32f88400 | 6631 | |
6b7e2d09 | 6632 | if (vcpu->mode == EXITING_GUEST_MODE || vcpu->requests |
d94e1dc9 | 6633 | || need_resched() || signal_pending(current)) { |
6b7e2d09 | 6634 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 6635 | smp_wmb(); |
6c142801 AK |
6636 | local_irq_enable(); |
6637 | preempt_enable(); | |
01b71917 | 6638 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
6c142801 | 6639 | r = 1; |
d905c069 | 6640 | goto cancel_injection; |
6c142801 AK |
6641 | } |
6642 | ||
fc5b7f3b DM |
6643 | kvm_load_guest_xcr0(vcpu); |
6644 | ||
c43203ca PB |
6645 | if (req_immediate_exit) { |
6646 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
d6185f20 | 6647 | smp_send_reschedule(vcpu->cpu); |
c43203ca | 6648 | } |
d6185f20 | 6649 | |
8b89fe1f PB |
6650 | trace_kvm_entry(vcpu->vcpu_id); |
6651 | wait_lapic_expire(vcpu); | |
ccf73aaf | 6652 | __kvm_guest_enter(); |
b6c7a5dc | 6653 | |
42dbaa5a | 6654 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
6655 | set_debugreg(0, 7); |
6656 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
6657 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
6658 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
6659 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
c77fb5fe | 6660 | set_debugreg(vcpu->arch.dr6, 6); |
ae561ede | 6661 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD; |
42dbaa5a | 6662 | } |
b6c7a5dc | 6663 | |
851ba692 | 6664 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 6665 | |
c77fb5fe PB |
6666 | /* |
6667 | * Do this here before restoring debug registers on the host. And | |
6668 | * since we do this before handling the vmexit, a DR access vmexit | |
6669 | * can (a) read the correct value of the debug registers, (b) set | |
6670 | * KVM_DEBUGREG_WONT_EXIT again. | |
6671 | */ | |
6672 | if (unlikely(vcpu->arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT)) { | |
c77fb5fe PB |
6673 | WARN_ON(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP); |
6674 | kvm_x86_ops->sync_dirty_debug_regs(vcpu); | |
70e4da7a PB |
6675 | kvm_update_dr0123(vcpu); |
6676 | kvm_update_dr6(vcpu); | |
6677 | kvm_update_dr7(vcpu); | |
6678 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD; | |
c77fb5fe PB |
6679 | } |
6680 | ||
24f1e32c FW |
6681 | /* |
6682 | * If the guest has used debug registers, at least dr7 | |
6683 | * will be disabled while returning to the host. | |
6684 | * If we don't have active breakpoints in the host, we don't | |
6685 | * care about the messed up debug address registers. But if | |
6686 | * we have some of them active, restore the old state. | |
6687 | */ | |
59d8eb53 | 6688 | if (hw_breakpoint_active()) |
24f1e32c | 6689 | hw_breakpoint_restore(); |
42dbaa5a | 6690 | |
4ba76538 | 6691 | vcpu->arch.last_guest_tsc = kvm_read_l1_tsc(vcpu, rdtsc()); |
1d5f066e | 6692 | |
6b7e2d09 | 6693 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 6694 | smp_wmb(); |
a547c6db | 6695 | |
fc5b7f3b DM |
6696 | kvm_put_guest_xcr0(vcpu); |
6697 | ||
a547c6db YZ |
6698 | /* Interrupt is enabled by handle_external_intr() */ |
6699 | kvm_x86_ops->handle_external_intr(vcpu); | |
b6c7a5dc HB |
6700 | |
6701 | ++vcpu->stat.exits; | |
6702 | ||
6703 | /* | |
6704 | * We must have an instruction between local_irq_enable() and | |
6705 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
6706 | * the interrupt shadow. The stat.exits increment will do nicely. | |
6707 | * But we need to prevent reordering, hence this barrier(): | |
6708 | */ | |
6709 | barrier(); | |
6710 | ||
6711 | kvm_guest_exit(); | |
6712 | ||
6713 | preempt_enable(); | |
6714 | ||
f656ce01 | 6715 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 6716 | |
b6c7a5dc HB |
6717 | /* |
6718 | * Profile KVM exit RIPs: | |
6719 | */ | |
6720 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
6721 | unsigned long rip = kvm_rip_read(vcpu); |
6722 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
6723 | } |
6724 | ||
cc578287 ZA |
6725 | if (unlikely(vcpu->arch.tsc_always_catchup)) |
6726 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); | |
298101da | 6727 | |
5cfb1d5a MT |
6728 | if (vcpu->arch.apic_attention) |
6729 | kvm_lapic_sync_from_vapic(vcpu); | |
b93463aa | 6730 | |
851ba692 | 6731 | r = kvm_x86_ops->handle_exit(vcpu); |
d905c069 MT |
6732 | return r; |
6733 | ||
6734 | cancel_injection: | |
6735 | kvm_x86_ops->cancel_injection(vcpu); | |
ae7a2a3f MT |
6736 | if (unlikely(vcpu->arch.apic_attention)) |
6737 | kvm_lapic_sync_from_vapic(vcpu); | |
d7690175 MT |
6738 | out: |
6739 | return r; | |
6740 | } | |
b6c7a5dc | 6741 | |
362c698f PB |
6742 | static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu) |
6743 | { | |
bf9f6ac8 FW |
6744 | if (!kvm_arch_vcpu_runnable(vcpu) && |
6745 | (!kvm_x86_ops->pre_block || kvm_x86_ops->pre_block(vcpu) == 0)) { | |
9c8fd1ba PB |
6746 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
6747 | kvm_vcpu_block(vcpu); | |
6748 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); | |
bf9f6ac8 FW |
6749 | |
6750 | if (kvm_x86_ops->post_block) | |
6751 | kvm_x86_ops->post_block(vcpu); | |
6752 | ||
9c8fd1ba PB |
6753 | if (!kvm_check_request(KVM_REQ_UNHALT, vcpu)) |
6754 | return 1; | |
6755 | } | |
362c698f PB |
6756 | |
6757 | kvm_apic_accept_events(vcpu); | |
6758 | switch(vcpu->arch.mp_state) { | |
6759 | case KVM_MP_STATE_HALTED: | |
6760 | vcpu->arch.pv.pv_unhalted = false; | |
6761 | vcpu->arch.mp_state = | |
6762 | KVM_MP_STATE_RUNNABLE; | |
6763 | case KVM_MP_STATE_RUNNABLE: | |
6764 | vcpu->arch.apf.halted = false; | |
6765 | break; | |
6766 | case KVM_MP_STATE_INIT_RECEIVED: | |
6767 | break; | |
6768 | default: | |
6769 | return -EINTR; | |
6770 | break; | |
6771 | } | |
6772 | return 1; | |
6773 | } | |
09cec754 | 6774 | |
5d9bc648 PB |
6775 | static inline bool kvm_vcpu_running(struct kvm_vcpu *vcpu) |
6776 | { | |
6777 | return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && | |
6778 | !vcpu->arch.apf.halted); | |
6779 | } | |
6780 | ||
362c698f | 6781 | static int vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
6782 | { |
6783 | int r; | |
f656ce01 | 6784 | struct kvm *kvm = vcpu->kvm; |
d7690175 | 6785 | |
f656ce01 | 6786 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 6787 | |
362c698f | 6788 | for (;;) { |
58f800d5 | 6789 | if (kvm_vcpu_running(vcpu)) { |
851ba692 | 6790 | r = vcpu_enter_guest(vcpu); |
bf9f6ac8 | 6791 | } else { |
362c698f | 6792 | r = vcpu_block(kvm, vcpu); |
bf9f6ac8 FW |
6793 | } |
6794 | ||
09cec754 GN |
6795 | if (r <= 0) |
6796 | break; | |
6797 | ||
6798 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
6799 | if (kvm_cpu_has_pending_timer(vcpu)) | |
6800 | kvm_inject_pending_timer_irqs(vcpu); | |
6801 | ||
782d422b MG |
6802 | if (dm_request_for_irq_injection(vcpu) && |
6803 | kvm_vcpu_ready_for_interrupt_injection(vcpu)) { | |
4ca7dd8c PB |
6804 | r = 0; |
6805 | vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; | |
09cec754 | 6806 | ++vcpu->stat.request_irq_exits; |
362c698f | 6807 | break; |
09cec754 | 6808 | } |
af585b92 GN |
6809 | |
6810 | kvm_check_async_pf_completion(vcpu); | |
6811 | ||
09cec754 GN |
6812 | if (signal_pending(current)) { |
6813 | r = -EINTR; | |
851ba692 | 6814 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 | 6815 | ++vcpu->stat.signal_exits; |
362c698f | 6816 | break; |
09cec754 GN |
6817 | } |
6818 | if (need_resched()) { | |
f656ce01 | 6819 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
c08ac06a | 6820 | cond_resched(); |
f656ce01 | 6821 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 6822 | } |
b6c7a5dc HB |
6823 | } |
6824 | ||
f656ce01 | 6825 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc HB |
6826 | |
6827 | return r; | |
6828 | } | |
6829 | ||
716d51ab GN |
6830 | static inline int complete_emulated_io(struct kvm_vcpu *vcpu) |
6831 | { | |
6832 | int r; | |
6833 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
6834 | r = emulate_instruction(vcpu, EMULTYPE_NO_DECODE); | |
6835 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); | |
6836 | if (r != EMULATE_DONE) | |
6837 | return 0; | |
6838 | return 1; | |
6839 | } | |
6840 | ||
6841 | static int complete_emulated_pio(struct kvm_vcpu *vcpu) | |
6842 | { | |
6843 | BUG_ON(!vcpu->arch.pio.count); | |
6844 | ||
6845 | return complete_emulated_io(vcpu); | |
6846 | } | |
6847 | ||
f78146b0 AK |
6848 | /* |
6849 | * Implements the following, as a state machine: | |
6850 | * | |
6851 | * read: | |
6852 | * for each fragment | |
87da7e66 XG |
6853 | * for each mmio piece in the fragment |
6854 | * write gpa, len | |
6855 | * exit | |
6856 | * copy data | |
f78146b0 AK |
6857 | * execute insn |
6858 | * | |
6859 | * write: | |
6860 | * for each fragment | |
87da7e66 XG |
6861 | * for each mmio piece in the fragment |
6862 | * write gpa, len | |
6863 | * copy data | |
6864 | * exit | |
f78146b0 | 6865 | */ |
716d51ab | 6866 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu) |
5287f194 AK |
6867 | { |
6868 | struct kvm_run *run = vcpu->run; | |
f78146b0 | 6869 | struct kvm_mmio_fragment *frag; |
87da7e66 | 6870 | unsigned len; |
5287f194 | 6871 | |
716d51ab | 6872 | BUG_ON(!vcpu->mmio_needed); |
5287f194 | 6873 | |
716d51ab | 6874 | /* Complete previous fragment */ |
87da7e66 XG |
6875 | frag = &vcpu->mmio_fragments[vcpu->mmio_cur_fragment]; |
6876 | len = min(8u, frag->len); | |
716d51ab | 6877 | if (!vcpu->mmio_is_write) |
87da7e66 XG |
6878 | memcpy(frag->data, run->mmio.data, len); |
6879 | ||
6880 | if (frag->len <= 8) { | |
6881 | /* Switch to the next fragment. */ | |
6882 | frag++; | |
6883 | vcpu->mmio_cur_fragment++; | |
6884 | } else { | |
6885 | /* Go forward to the next mmio piece. */ | |
6886 | frag->data += len; | |
6887 | frag->gpa += len; | |
6888 | frag->len -= len; | |
6889 | } | |
6890 | ||
a08d3b3b | 6891 | if (vcpu->mmio_cur_fragment >= vcpu->mmio_nr_fragments) { |
716d51ab | 6892 | vcpu->mmio_needed = 0; |
0912c977 PB |
6893 | |
6894 | /* FIXME: return into emulator if single-stepping. */ | |
cef4dea0 | 6895 | if (vcpu->mmio_is_write) |
716d51ab GN |
6896 | return 1; |
6897 | vcpu->mmio_read_completed = 1; | |
6898 | return complete_emulated_io(vcpu); | |
6899 | } | |
87da7e66 | 6900 | |
716d51ab GN |
6901 | run->exit_reason = KVM_EXIT_MMIO; |
6902 | run->mmio.phys_addr = frag->gpa; | |
6903 | if (vcpu->mmio_is_write) | |
87da7e66 XG |
6904 | memcpy(run->mmio.data, frag->data, min(8u, frag->len)); |
6905 | run->mmio.len = min(8u, frag->len); | |
716d51ab GN |
6906 | run->mmio.is_write = vcpu->mmio_is_write; |
6907 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; | |
6908 | return 0; | |
5287f194 AK |
6909 | } |
6910 | ||
716d51ab | 6911 | |
b6c7a5dc HB |
6912 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
6913 | { | |
c5bedc68 | 6914 | struct fpu *fpu = ¤t->thread.fpu; |
b6c7a5dc HB |
6915 | int r; |
6916 | sigset_t sigsaved; | |
6917 | ||
c4d72e2d | 6918 | fpu__activate_curr(fpu); |
e5c30142 | 6919 | |
ac9f6dc0 AK |
6920 | if (vcpu->sigset_active) |
6921 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
6922 | ||
a4535290 | 6923 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 6924 | kvm_vcpu_block(vcpu); |
66450a21 | 6925 | kvm_apic_accept_events(vcpu); |
d7690175 | 6926 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
6927 | r = -EAGAIN; |
6928 | goto out; | |
b6c7a5dc HB |
6929 | } |
6930 | ||
b6c7a5dc | 6931 | /* re-sync apic's tpr */ |
35754c98 | 6932 | if (!lapic_in_kernel(vcpu)) { |
eea1cff9 AP |
6933 | if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) { |
6934 | r = -EINVAL; | |
6935 | goto out; | |
6936 | } | |
6937 | } | |
b6c7a5dc | 6938 | |
716d51ab GN |
6939 | if (unlikely(vcpu->arch.complete_userspace_io)) { |
6940 | int (*cui)(struct kvm_vcpu *) = vcpu->arch.complete_userspace_io; | |
6941 | vcpu->arch.complete_userspace_io = NULL; | |
6942 | r = cui(vcpu); | |
6943 | if (r <= 0) | |
6944 | goto out; | |
6945 | } else | |
6946 | WARN_ON(vcpu->arch.pio.count || vcpu->mmio_needed); | |
5287f194 | 6947 | |
362c698f | 6948 | r = vcpu_run(vcpu); |
b6c7a5dc HB |
6949 | |
6950 | out: | |
f1d86e46 | 6951 | post_kvm_run_save(vcpu); |
b6c7a5dc HB |
6952 | if (vcpu->sigset_active) |
6953 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
6954 | ||
b6c7a5dc HB |
6955 | return r; |
6956 | } | |
6957 | ||
6958 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
6959 | { | |
7ae441ea GN |
6960 | if (vcpu->arch.emulate_regs_need_sync_to_vcpu) { |
6961 | /* | |
6962 | * We are here if userspace calls get_regs() in the middle of | |
6963 | * instruction emulation. Registers state needs to be copied | |
4a969980 | 6964 | * back from emulation context to vcpu. Userspace shouldn't do |
7ae441ea GN |
6965 | * that usually, but some bad designed PV devices (vmware |
6966 | * backdoor interface) need this to work | |
6967 | */ | |
dd856efa | 6968 | emulator_writeback_register_cache(&vcpu->arch.emulate_ctxt); |
7ae441ea GN |
6969 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
6970 | } | |
5fdbf976 MT |
6971 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
6972 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
6973 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
6974 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
6975 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
6976 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
6977 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
6978 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 6979 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
6980 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
6981 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
6982 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
6983 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
6984 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
6985 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
6986 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
6987 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
6988 | #endif |
6989 | ||
5fdbf976 | 6990 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 6991 | regs->rflags = kvm_get_rflags(vcpu); |
b6c7a5dc | 6992 | |
b6c7a5dc HB |
6993 | return 0; |
6994 | } | |
6995 | ||
6996 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
6997 | { | |
7ae441ea GN |
6998 | vcpu->arch.emulate_regs_need_sync_from_vcpu = true; |
6999 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; | |
7000 | ||
5fdbf976 MT |
7001 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
7002 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
7003 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
7004 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
7005 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
7006 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
7007 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
7008 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 7009 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
7010 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
7011 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
7012 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
7013 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
7014 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
7015 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
7016 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
7017 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
7018 | #endif |
7019 | ||
5fdbf976 | 7020 | kvm_rip_write(vcpu, regs->rip); |
91586a3b | 7021 | kvm_set_rflags(vcpu, regs->rflags); |
b6c7a5dc | 7022 | |
b4f14abd JK |
7023 | vcpu->arch.exception.pending = false; |
7024 | ||
3842d135 AK |
7025 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
7026 | ||
b6c7a5dc HB |
7027 | return 0; |
7028 | } | |
7029 | ||
b6c7a5dc HB |
7030 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
7031 | { | |
7032 | struct kvm_segment cs; | |
7033 | ||
3e6e0aab | 7034 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
7035 | *db = cs.db; |
7036 | *l = cs.l; | |
7037 | } | |
7038 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
7039 | ||
7040 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
7041 | struct kvm_sregs *sregs) | |
7042 | { | |
89a27f4d | 7043 | struct desc_ptr dt; |
b6c7a5dc | 7044 | |
3e6e0aab GT |
7045 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
7046 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
7047 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
7048 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
7049 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
7050 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 7051 | |
3e6e0aab GT |
7052 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
7053 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
7054 | |
7055 | kvm_x86_ops->get_idt(vcpu, &dt); | |
89a27f4d GN |
7056 | sregs->idt.limit = dt.size; |
7057 | sregs->idt.base = dt.address; | |
b6c7a5dc | 7058 | kvm_x86_ops->get_gdt(vcpu, &dt); |
89a27f4d GN |
7059 | sregs->gdt.limit = dt.size; |
7060 | sregs->gdt.base = dt.address; | |
b6c7a5dc | 7061 | |
4d4ec087 | 7062 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c | 7063 | sregs->cr2 = vcpu->arch.cr2; |
9f8fe504 | 7064 | sregs->cr3 = kvm_read_cr3(vcpu); |
fc78f519 | 7065 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 7066 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 7067 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
7068 | sregs->apic_base = kvm_get_apic_base(vcpu); |
7069 | ||
923c61bb | 7070 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 7071 | |
36752c9b | 7072 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
7073 | set_bit(vcpu->arch.interrupt.nr, |
7074 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 7075 | |
b6c7a5dc HB |
7076 | return 0; |
7077 | } | |
7078 | ||
62d9f0db MT |
7079 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
7080 | struct kvm_mp_state *mp_state) | |
7081 | { | |
66450a21 | 7082 | kvm_apic_accept_events(vcpu); |
6aef266c SV |
7083 | if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED && |
7084 | vcpu->arch.pv.pv_unhalted) | |
7085 | mp_state->mp_state = KVM_MP_STATE_RUNNABLE; | |
7086 | else | |
7087 | mp_state->mp_state = vcpu->arch.mp_state; | |
7088 | ||
62d9f0db MT |
7089 | return 0; |
7090 | } | |
7091 | ||
7092 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
7093 | struct kvm_mp_state *mp_state) | |
7094 | { | |
bce87cce | 7095 | if (!lapic_in_kernel(vcpu) && |
66450a21 JK |
7096 | mp_state->mp_state != KVM_MP_STATE_RUNNABLE) |
7097 | return -EINVAL; | |
7098 | ||
7099 | if (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED) { | |
7100 | vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; | |
7101 | set_bit(KVM_APIC_SIPI, &vcpu->arch.apic->pending_events); | |
7102 | } else | |
7103 | vcpu->arch.mp_state = mp_state->mp_state; | |
3842d135 | 7104 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
62d9f0db MT |
7105 | return 0; |
7106 | } | |
7107 | ||
7f3d35fd KW |
7108 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, |
7109 | int reason, bool has_error_code, u32 error_code) | |
b6c7a5dc | 7110 | { |
9d74191a | 7111 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d | 7112 | int ret; |
e01c2426 | 7113 | |
8ec4722d | 7114 | init_emulate_ctxt(vcpu); |
c697518a | 7115 | |
7f3d35fd | 7116 | ret = emulator_task_switch(ctxt, tss_selector, idt_index, reason, |
9d74191a | 7117 | has_error_code, error_code); |
c697518a | 7118 | |
c697518a | 7119 | if (ret) |
19d04437 | 7120 | return EMULATE_FAIL; |
37817f29 | 7121 | |
9d74191a TY |
7122 | kvm_rip_write(vcpu, ctxt->eip); |
7123 | kvm_set_rflags(vcpu, ctxt->eflags); | |
3842d135 | 7124 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
19d04437 | 7125 | return EMULATE_DONE; |
37817f29 IE |
7126 | } |
7127 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
7128 | ||
b6c7a5dc HB |
7129 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
7130 | struct kvm_sregs *sregs) | |
7131 | { | |
58cb628d | 7132 | struct msr_data apic_base_msr; |
b6c7a5dc | 7133 | int mmu_reset_needed = 0; |
63f42e02 | 7134 | int pending_vec, max_bits, idx; |
89a27f4d | 7135 | struct desc_ptr dt; |
b6c7a5dc | 7136 | |
6d1068b3 PM |
7137 | if (!guest_cpuid_has_xsave(vcpu) && (sregs->cr4 & X86_CR4_OSXSAVE)) |
7138 | return -EINVAL; | |
7139 | ||
89a27f4d GN |
7140 | dt.size = sregs->idt.limit; |
7141 | dt.address = sregs->idt.base; | |
b6c7a5dc | 7142 | kvm_x86_ops->set_idt(vcpu, &dt); |
89a27f4d GN |
7143 | dt.size = sregs->gdt.limit; |
7144 | dt.address = sregs->gdt.base; | |
b6c7a5dc HB |
7145 | kvm_x86_ops->set_gdt(vcpu, &dt); |
7146 | ||
ad312c7c | 7147 | vcpu->arch.cr2 = sregs->cr2; |
9f8fe504 | 7148 | mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3; |
dc7e795e | 7149 | vcpu->arch.cr3 = sregs->cr3; |
aff48baa | 7150 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
b6c7a5dc | 7151 | |
2d3ad1f4 | 7152 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 7153 | |
f6801dff | 7154 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 7155 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
58cb628d JK |
7156 | apic_base_msr.data = sregs->apic_base; |
7157 | apic_base_msr.host_initiated = true; | |
7158 | kvm_set_apic_base(vcpu, &apic_base_msr); | |
b6c7a5dc | 7159 | |
4d4ec087 | 7160 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 7161 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 7162 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 7163 | |
fc78f519 | 7164 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 7165 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
b9baba86 | 7166 | if (sregs->cr4 & (X86_CR4_OSXSAVE | X86_CR4_PKE)) |
00b27a3e | 7167 | kvm_update_cpuid(vcpu); |
63f42e02 XG |
7168 | |
7169 | idx = srcu_read_lock(&vcpu->kvm->srcu); | |
7c93be44 | 7170 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
9f8fe504 | 7171 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); |
7c93be44 MT |
7172 | mmu_reset_needed = 1; |
7173 | } | |
63f42e02 | 7174 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b6c7a5dc HB |
7175 | |
7176 | if (mmu_reset_needed) | |
7177 | kvm_mmu_reset_context(vcpu); | |
7178 | ||
a50abc3b | 7179 | max_bits = KVM_NR_INTERRUPTS; |
923c61bb GN |
7180 | pending_vec = find_first_bit( |
7181 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
7182 | if (pending_vec < max_bits) { | |
66fd3f7f | 7183 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb | 7184 | pr_debug("Set back pending irq %d\n", pending_vec); |
b6c7a5dc HB |
7185 | } |
7186 | ||
3e6e0aab GT |
7187 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
7188 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
7189 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
7190 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
7191 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
7192 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 7193 | |
3e6e0aab GT |
7194 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
7195 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 7196 | |
5f0269f5 ME |
7197 | update_cr8_intercept(vcpu); |
7198 | ||
9c3e4aab | 7199 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 7200 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 7201 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 7202 | !is_protmode(vcpu)) |
9c3e4aab MT |
7203 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
7204 | ||
3842d135 AK |
7205 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
7206 | ||
b6c7a5dc HB |
7207 | return 0; |
7208 | } | |
7209 | ||
d0bfb940 JK |
7210 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
7211 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 7212 | { |
355be0b9 | 7213 | unsigned long rflags; |
ae675ef0 | 7214 | int i, r; |
b6c7a5dc | 7215 | |
4f926bf2 JK |
7216 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
7217 | r = -EBUSY; | |
7218 | if (vcpu->arch.exception.pending) | |
2122ff5e | 7219 | goto out; |
4f926bf2 JK |
7220 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
7221 | kvm_queue_exception(vcpu, DB_VECTOR); | |
7222 | else | |
7223 | kvm_queue_exception(vcpu, BP_VECTOR); | |
7224 | } | |
7225 | ||
91586a3b JK |
7226 | /* |
7227 | * Read rflags as long as potentially injected trace flags are still | |
7228 | * filtered out. | |
7229 | */ | |
7230 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
7231 | |
7232 | vcpu->guest_debug = dbg->control; | |
7233 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
7234 | vcpu->guest_debug = 0; | |
7235 | ||
7236 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
7237 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
7238 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
c8639010 | 7239 | vcpu->arch.guest_debug_dr7 = dbg->arch.debugreg[7]; |
ae675ef0 JK |
7240 | } else { |
7241 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
7242 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
ae675ef0 | 7243 | } |
c8639010 | 7244 | kvm_update_dr7(vcpu); |
ae675ef0 | 7245 | |
f92653ee JK |
7246 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
7247 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + | |
7248 | get_segment_base(vcpu, VCPU_SREG_CS); | |
94fe45da | 7249 | |
91586a3b JK |
7250 | /* |
7251 | * Trigger an rflags update that will inject or remove the trace | |
7252 | * flags. | |
7253 | */ | |
7254 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 7255 | |
a96036b8 | 7256 | kvm_x86_ops->update_bp_intercept(vcpu); |
b6c7a5dc | 7257 | |
4f926bf2 | 7258 | r = 0; |
d0bfb940 | 7259 | |
2122ff5e | 7260 | out: |
b6c7a5dc HB |
7261 | |
7262 | return r; | |
7263 | } | |
7264 | ||
8b006791 ZX |
7265 | /* |
7266 | * Translate a guest virtual address to a guest physical address. | |
7267 | */ | |
7268 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
7269 | struct kvm_translation *tr) | |
7270 | { | |
7271 | unsigned long vaddr = tr->linear_address; | |
7272 | gpa_t gpa; | |
f656ce01 | 7273 | int idx; |
8b006791 | 7274 | |
f656ce01 | 7275 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 7276 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 7277 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
7278 | tr->physical_address = gpa; |
7279 | tr->valid = gpa != UNMAPPED_GVA; | |
7280 | tr->writeable = 1; | |
7281 | tr->usermode = 0; | |
8b006791 ZX |
7282 | |
7283 | return 0; | |
7284 | } | |
7285 | ||
d0752060 HB |
7286 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
7287 | { | |
c47ada30 | 7288 | struct fxregs_state *fxsave = |
7366ed77 | 7289 | &vcpu->arch.guest_fpu.state.fxsave; |
d0752060 | 7290 | |
d0752060 HB |
7291 | memcpy(fpu->fpr, fxsave->st_space, 128); |
7292 | fpu->fcw = fxsave->cwd; | |
7293 | fpu->fsw = fxsave->swd; | |
7294 | fpu->ftwx = fxsave->twd; | |
7295 | fpu->last_opcode = fxsave->fop; | |
7296 | fpu->last_ip = fxsave->rip; | |
7297 | fpu->last_dp = fxsave->rdp; | |
7298 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
7299 | ||
d0752060 HB |
7300 | return 0; |
7301 | } | |
7302 | ||
7303 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
7304 | { | |
c47ada30 | 7305 | struct fxregs_state *fxsave = |
7366ed77 | 7306 | &vcpu->arch.guest_fpu.state.fxsave; |
d0752060 | 7307 | |
d0752060 HB |
7308 | memcpy(fxsave->st_space, fpu->fpr, 128); |
7309 | fxsave->cwd = fpu->fcw; | |
7310 | fxsave->swd = fpu->fsw; | |
7311 | fxsave->twd = fpu->ftwx; | |
7312 | fxsave->fop = fpu->last_opcode; | |
7313 | fxsave->rip = fpu->last_ip; | |
7314 | fxsave->rdp = fpu->last_dp; | |
7315 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
7316 | ||
d0752060 HB |
7317 | return 0; |
7318 | } | |
7319 | ||
0ee6a517 | 7320 | static void fx_init(struct kvm_vcpu *vcpu) |
d0752060 | 7321 | { |
bf935b0b | 7322 | fpstate_init(&vcpu->arch.guest_fpu.state); |
782511b0 | 7323 | if (boot_cpu_has(X86_FEATURE_XSAVES)) |
7366ed77 | 7324 | vcpu->arch.guest_fpu.state.xsave.header.xcomp_bv = |
df1daba7 | 7325 | host_xcr0 | XSTATE_COMPACTION_ENABLED; |
d0752060 | 7326 | |
2acf923e DC |
7327 | /* |
7328 | * Ensure guest xcr0 is valid for loading | |
7329 | */ | |
d91cab78 | 7330 | vcpu->arch.xcr0 = XFEATURE_MASK_FP; |
2acf923e | 7331 | |
ad312c7c | 7332 | vcpu->arch.cr0 |= X86_CR0_ET; |
d0752060 | 7333 | } |
d0752060 HB |
7334 | |
7335 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) | |
7336 | { | |
2608d7a1 | 7337 | if (vcpu->guest_fpu_loaded) |
d0752060 HB |
7338 | return; |
7339 | ||
2acf923e DC |
7340 | /* |
7341 | * Restore all possible states in the guest, | |
7342 | * and assume host would use all available bits. | |
7343 | * Guest xcr0 would be loaded later. | |
7344 | */ | |
d0752060 | 7345 | vcpu->guest_fpu_loaded = 1; |
b1a74bf8 | 7346 | __kernel_fpu_begin(); |
003e2e8b | 7347 | __copy_kernel_to_fpregs(&vcpu->arch.guest_fpu.state); |
0c04851c | 7348 | trace_kvm_fpu(1); |
d0752060 | 7349 | } |
d0752060 HB |
7350 | |
7351 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
7352 | { | |
653f52c3 RR |
7353 | if (!vcpu->guest_fpu_loaded) { |
7354 | vcpu->fpu_counter = 0; | |
d0752060 | 7355 | return; |
653f52c3 | 7356 | } |
d0752060 HB |
7357 | |
7358 | vcpu->guest_fpu_loaded = 0; | |
4f836347 | 7359 | copy_fpregs_to_fpstate(&vcpu->arch.guest_fpu); |
b1a74bf8 | 7360 | __kernel_fpu_end(); |
f096ed85 | 7361 | ++vcpu->stat.fpu_reload; |
653f52c3 RR |
7362 | /* |
7363 | * If using eager FPU mode, or if the guest is a frequent user | |
7364 | * of the FPU, just leave the FPU active for next time. | |
7365 | * Every 255 times fpu_counter rolls over to 0; a guest that uses | |
7366 | * the FPU in bursts will revert to loading it on demand. | |
7367 | */ | |
5a5fbdc0 | 7368 | if (!use_eager_fpu()) { |
653f52c3 RR |
7369 | if (++vcpu->fpu_counter < 5) |
7370 | kvm_make_request(KVM_REQ_DEACTIVATE_FPU, vcpu); | |
7371 | } | |
0c04851c | 7372 | trace_kvm_fpu(0); |
d0752060 | 7373 | } |
e9b11c17 ZX |
7374 | |
7375 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
7376 | { | |
12f9a48f | 7377 | kvmclock_reset(vcpu); |
7f1ea208 | 7378 | |
f5f48ee1 | 7379 | free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); |
e9b11c17 ZX |
7380 | kvm_x86_ops->vcpu_free(vcpu); |
7381 | } | |
7382 | ||
7383 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
7384 | unsigned int id) | |
7385 | { | |
c447e76b LL |
7386 | struct kvm_vcpu *vcpu; |
7387 | ||
6755bae8 ZA |
7388 | if (check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0) |
7389 | printk_once(KERN_WARNING | |
7390 | "kvm: SMP vm created on host with unstable TSC; " | |
7391 | "guest TSC will not be reliable\n"); | |
c447e76b LL |
7392 | |
7393 | vcpu = kvm_x86_ops->vcpu_create(kvm, id); | |
7394 | ||
c447e76b | 7395 | return vcpu; |
26e5215f | 7396 | } |
e9b11c17 | 7397 | |
26e5215f AK |
7398 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
7399 | { | |
7400 | int r; | |
e9b11c17 | 7401 | |
19efffa2 | 7402 | kvm_vcpu_mtrr_init(vcpu); |
9fc77441 MT |
7403 | r = vcpu_load(vcpu); |
7404 | if (r) | |
7405 | return r; | |
d28bc9dd | 7406 | kvm_vcpu_reset(vcpu, false); |
8a3c1a33 | 7407 | kvm_mmu_setup(vcpu); |
e9b11c17 | 7408 | vcpu_put(vcpu); |
26e5215f | 7409 | return r; |
e9b11c17 ZX |
7410 | } |
7411 | ||
31928aa5 | 7412 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 7413 | { |
8fe8ab46 | 7414 | struct msr_data msr; |
332967a3 | 7415 | struct kvm *kvm = vcpu->kvm; |
42897d86 | 7416 | |
31928aa5 DD |
7417 | if (vcpu_load(vcpu)) |
7418 | return; | |
8fe8ab46 WA |
7419 | msr.data = 0x0; |
7420 | msr.index = MSR_IA32_TSC; | |
7421 | msr.host_initiated = true; | |
7422 | kvm_write_tsc(vcpu, &msr); | |
42897d86 MT |
7423 | vcpu_put(vcpu); |
7424 | ||
630994b3 MT |
7425 | if (!kvmclock_periodic_sync) |
7426 | return; | |
7427 | ||
332967a3 AJ |
7428 | schedule_delayed_work(&kvm->arch.kvmclock_sync_work, |
7429 | KVMCLOCK_SYNC_PERIOD); | |
42897d86 MT |
7430 | } |
7431 | ||
d40ccc62 | 7432 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 | 7433 | { |
9fc77441 | 7434 | int r; |
344d9588 GN |
7435 | vcpu->arch.apf.msr_val = 0; |
7436 | ||
9fc77441 MT |
7437 | r = vcpu_load(vcpu); |
7438 | BUG_ON(r); | |
e9b11c17 ZX |
7439 | kvm_mmu_unload(vcpu); |
7440 | vcpu_put(vcpu); | |
7441 | ||
7442 | kvm_x86_ops->vcpu_free(vcpu); | |
7443 | } | |
7444 | ||
d28bc9dd | 7445 | void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) |
e9b11c17 | 7446 | { |
e69fab5d PB |
7447 | vcpu->arch.hflags = 0; |
7448 | ||
c43203ca | 7449 | vcpu->arch.smi_pending = 0; |
7460fb4a AK |
7450 | atomic_set(&vcpu->arch.nmi_queued, 0); |
7451 | vcpu->arch.nmi_pending = 0; | |
448fa4a9 | 7452 | vcpu->arch.nmi_injected = false; |
5f7552d4 NA |
7453 | kvm_clear_interrupt_queue(vcpu); |
7454 | kvm_clear_exception_queue(vcpu); | |
448fa4a9 | 7455 | |
42dbaa5a | 7456 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); |
ae561ede | 7457 | kvm_update_dr0123(vcpu); |
6f43ed01 | 7458 | vcpu->arch.dr6 = DR6_INIT; |
73aaf249 | 7459 | kvm_update_dr6(vcpu); |
42dbaa5a | 7460 | vcpu->arch.dr7 = DR7_FIXED_1; |
c8639010 | 7461 | kvm_update_dr7(vcpu); |
42dbaa5a | 7462 | |
1119022c NA |
7463 | vcpu->arch.cr2 = 0; |
7464 | ||
3842d135 | 7465 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
344d9588 | 7466 | vcpu->arch.apf.msr_val = 0; |
c9aaa895 | 7467 | vcpu->arch.st.msr_val = 0; |
3842d135 | 7468 | |
12f9a48f GC |
7469 | kvmclock_reset(vcpu); |
7470 | ||
af585b92 GN |
7471 | kvm_clear_async_pf_completion_queue(vcpu); |
7472 | kvm_async_pf_hash_reset(vcpu); | |
7473 | vcpu->arch.apf.halted = false; | |
3842d135 | 7474 | |
64d60670 | 7475 | if (!init_event) { |
d28bc9dd | 7476 | kvm_pmu_reset(vcpu); |
64d60670 PB |
7477 | vcpu->arch.smbase = 0x30000; |
7478 | } | |
f5132b01 | 7479 | |
66f7b72e JS |
7480 | memset(vcpu->arch.regs, 0, sizeof(vcpu->arch.regs)); |
7481 | vcpu->arch.regs_avail = ~0; | |
7482 | vcpu->arch.regs_dirty = ~0; | |
7483 | ||
d28bc9dd | 7484 | kvm_x86_ops->vcpu_reset(vcpu, init_event); |
e9b11c17 ZX |
7485 | } |
7486 | ||
2b4a273b | 7487 | void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector) |
66450a21 JK |
7488 | { |
7489 | struct kvm_segment cs; | |
7490 | ||
7491 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
7492 | cs.selector = vector << 8; | |
7493 | cs.base = vector << 12; | |
7494 | kvm_set_segment(vcpu, &cs, VCPU_SREG_CS); | |
7495 | kvm_rip_write(vcpu, 0); | |
e9b11c17 ZX |
7496 | } |
7497 | ||
13a34e06 | 7498 | int kvm_arch_hardware_enable(void) |
e9b11c17 | 7499 | { |
ca84d1a2 ZA |
7500 | struct kvm *kvm; |
7501 | struct kvm_vcpu *vcpu; | |
7502 | int i; | |
0dd6a6ed ZA |
7503 | int ret; |
7504 | u64 local_tsc; | |
7505 | u64 max_tsc = 0; | |
7506 | bool stable, backwards_tsc = false; | |
18863bdd AK |
7507 | |
7508 | kvm_shared_msr_cpu_online(); | |
13a34e06 | 7509 | ret = kvm_x86_ops->hardware_enable(); |
0dd6a6ed ZA |
7510 | if (ret != 0) |
7511 | return ret; | |
7512 | ||
4ea1636b | 7513 | local_tsc = rdtsc(); |
0dd6a6ed ZA |
7514 | stable = !check_tsc_unstable(); |
7515 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
7516 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
7517 | if (!stable && vcpu->cpu == smp_processor_id()) | |
105b21bb | 7518 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0dd6a6ed ZA |
7519 | if (stable && vcpu->arch.last_host_tsc > local_tsc) { |
7520 | backwards_tsc = true; | |
7521 | if (vcpu->arch.last_host_tsc > max_tsc) | |
7522 | max_tsc = vcpu->arch.last_host_tsc; | |
7523 | } | |
7524 | } | |
7525 | } | |
7526 | ||
7527 | /* | |
7528 | * Sometimes, even reliable TSCs go backwards. This happens on | |
7529 | * platforms that reset TSC during suspend or hibernate actions, but | |
7530 | * maintain synchronization. We must compensate. Fortunately, we can | |
7531 | * detect that condition here, which happens early in CPU bringup, | |
7532 | * before any KVM threads can be running. Unfortunately, we can't | |
7533 | * bring the TSCs fully up to date with real time, as we aren't yet far | |
7534 | * enough into CPU bringup that we know how much real time has actually | |
7535 | * elapsed; our helper function, get_kernel_ns() will be using boot | |
7536 | * variables that haven't been updated yet. | |
7537 | * | |
7538 | * So we simply find the maximum observed TSC above, then record the | |
7539 | * adjustment to TSC in each VCPU. When the VCPU later gets loaded, | |
7540 | * the adjustment will be applied. Note that we accumulate | |
7541 | * adjustments, in case multiple suspend cycles happen before some VCPU | |
7542 | * gets a chance to run again. In the event that no KVM threads get a | |
7543 | * chance to run, we will miss the entire elapsed period, as we'll have | |
7544 | * reset last_host_tsc, so VCPUs will not have the TSC adjusted and may | |
7545 | * loose cycle time. This isn't too big a deal, since the loss will be | |
7546 | * uniform across all VCPUs (not to mention the scenario is extremely | |
7547 | * unlikely). It is possible that a second hibernate recovery happens | |
7548 | * much faster than a first, causing the observed TSC here to be | |
7549 | * smaller; this would require additional padding adjustment, which is | |
7550 | * why we set last_host_tsc to the local tsc observed here. | |
7551 | * | |
7552 | * N.B. - this code below runs only on platforms with reliable TSC, | |
7553 | * as that is the only way backwards_tsc is set above. Also note | |
7554 | * that this runs for ALL vcpus, which is not a bug; all VCPUs should | |
7555 | * have the same delta_cyc adjustment applied if backwards_tsc | |
7556 | * is detected. Note further, this adjustment is only done once, | |
7557 | * as we reset last_host_tsc on all VCPUs to stop this from being | |
7558 | * called multiple times (one for each physical CPU bringup). | |
7559 | * | |
4a969980 | 7560 | * Platforms with unreliable TSCs don't have to deal with this, they |
0dd6a6ed ZA |
7561 | * will be compensated by the logic in vcpu_load, which sets the TSC to |
7562 | * catchup mode. This will catchup all VCPUs to real time, but cannot | |
7563 | * guarantee that they stay in perfect synchronization. | |
7564 | */ | |
7565 | if (backwards_tsc) { | |
7566 | u64 delta_cyc = max_tsc - local_tsc; | |
16a96021 | 7567 | backwards_tsc_observed = true; |
0dd6a6ed ZA |
7568 | list_for_each_entry(kvm, &vm_list, vm_list) { |
7569 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
7570 | vcpu->arch.tsc_offset_adjustment += delta_cyc; | |
7571 | vcpu->arch.last_host_tsc = local_tsc; | |
105b21bb | 7572 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
0dd6a6ed ZA |
7573 | } |
7574 | ||
7575 | /* | |
7576 | * We have to disable TSC offset matching.. if you were | |
7577 | * booting a VM while issuing an S4 host suspend.... | |
7578 | * you may have some problem. Solving this issue is | |
7579 | * left as an exercise to the reader. | |
7580 | */ | |
7581 | kvm->arch.last_tsc_nsec = 0; | |
7582 | kvm->arch.last_tsc_write = 0; | |
7583 | } | |
7584 | ||
7585 | } | |
7586 | return 0; | |
e9b11c17 ZX |
7587 | } |
7588 | ||
13a34e06 | 7589 | void kvm_arch_hardware_disable(void) |
e9b11c17 | 7590 | { |
13a34e06 RK |
7591 | kvm_x86_ops->hardware_disable(); |
7592 | drop_user_return_notifiers(); | |
e9b11c17 ZX |
7593 | } |
7594 | ||
7595 | int kvm_arch_hardware_setup(void) | |
7596 | { | |
9e9c3fe4 NA |
7597 | int r; |
7598 | ||
7599 | r = kvm_x86_ops->hardware_setup(); | |
7600 | if (r != 0) | |
7601 | return r; | |
7602 | ||
35181e86 HZ |
7603 | if (kvm_has_tsc_control) { |
7604 | /* | |
7605 | * Make sure the user can only configure tsc_khz values that | |
7606 | * fit into a signed integer. | |
7607 | * A min value is not calculated needed because it will always | |
7608 | * be 1 on all machines. | |
7609 | */ | |
7610 | u64 max = min(0x7fffffffULL, | |
7611 | __scale_tsc(kvm_max_tsc_scaling_ratio, tsc_khz)); | |
7612 | kvm_max_guest_tsc_khz = max; | |
7613 | ||
ad721883 | 7614 | kvm_default_tsc_scaling_ratio = 1ULL << kvm_tsc_scaling_ratio_frac_bits; |
35181e86 | 7615 | } |
ad721883 | 7616 | |
9e9c3fe4 NA |
7617 | kvm_init_msr_list(); |
7618 | return 0; | |
e9b11c17 ZX |
7619 | } |
7620 | ||
7621 | void kvm_arch_hardware_unsetup(void) | |
7622 | { | |
7623 | kvm_x86_ops->hardware_unsetup(); | |
7624 | } | |
7625 | ||
7626 | void kvm_arch_check_processor_compat(void *rtn) | |
7627 | { | |
7628 | kvm_x86_ops->check_processor_compatibility(rtn); | |
d71ba788 PB |
7629 | } |
7630 | ||
7631 | bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu) | |
7632 | { | |
7633 | return vcpu->kvm->arch.bsp_vcpu_id == vcpu->vcpu_id; | |
7634 | } | |
7635 | EXPORT_SYMBOL_GPL(kvm_vcpu_is_reset_bsp); | |
7636 | ||
7637 | bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) | |
7638 | { | |
7639 | return (vcpu->arch.apic_base & MSR_IA32_APICBASE_BSP) != 0; | |
e9b11c17 ZX |
7640 | } |
7641 | ||
3e515705 AK |
7642 | bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) |
7643 | { | |
35754c98 | 7644 | return irqchip_in_kernel(vcpu->kvm) == lapic_in_kernel(vcpu); |
3e515705 AK |
7645 | } |
7646 | ||
54e9818f | 7647 | struct static_key kvm_no_apic_vcpu __read_mostly; |
bce87cce | 7648 | EXPORT_SYMBOL_GPL(kvm_no_apic_vcpu); |
54e9818f | 7649 | |
e9b11c17 ZX |
7650 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
7651 | { | |
7652 | struct page *page; | |
7653 | struct kvm *kvm; | |
7654 | int r; | |
7655 | ||
7656 | BUG_ON(vcpu->kvm == NULL); | |
7657 | kvm = vcpu->kvm; | |
7658 | ||
d62caabb | 7659 | vcpu->arch.apicv_active = kvm_x86_ops->get_enable_apicv(); |
6aef266c | 7660 | vcpu->arch.pv.pv_unhalted = false; |
9aabc88f | 7661 | vcpu->arch.emulate_ctxt.ops = &emulate_ops; |
58d269d8 | 7662 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_reset_bsp(vcpu)) |
a4535290 | 7663 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 7664 | else |
a4535290 | 7665 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
7666 | |
7667 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
7668 | if (!page) { | |
7669 | r = -ENOMEM; | |
7670 | goto fail; | |
7671 | } | |
ad312c7c | 7672 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 | 7673 | |
cc578287 | 7674 | kvm_set_tsc_khz(vcpu, max_tsc_khz); |
c285545f | 7675 | |
e9b11c17 ZX |
7676 | r = kvm_mmu_create(vcpu); |
7677 | if (r < 0) | |
7678 | goto fail_free_pio_data; | |
7679 | ||
7680 | if (irqchip_in_kernel(kvm)) { | |
7681 | r = kvm_create_lapic(vcpu); | |
7682 | if (r < 0) | |
7683 | goto fail_mmu_destroy; | |
54e9818f GN |
7684 | } else |
7685 | static_key_slow_inc(&kvm_no_apic_vcpu); | |
e9b11c17 | 7686 | |
890ca9ae HY |
7687 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
7688 | GFP_KERNEL); | |
7689 | if (!vcpu->arch.mce_banks) { | |
7690 | r = -ENOMEM; | |
443c39bc | 7691 | goto fail_free_lapic; |
890ca9ae HY |
7692 | } |
7693 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
7694 | ||
f1797359 WY |
7695 | if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL)) { |
7696 | r = -ENOMEM; | |
f5f48ee1 | 7697 | goto fail_free_mce_banks; |
f1797359 | 7698 | } |
f5f48ee1 | 7699 | |
0ee6a517 | 7700 | fx_init(vcpu); |
66f7b72e | 7701 | |
ba904635 | 7702 | vcpu->arch.ia32_tsc_adjust_msr = 0x0; |
0b79459b | 7703 | vcpu->arch.pv_time_enabled = false; |
d7876f1b PB |
7704 | |
7705 | vcpu->arch.guest_supported_xcr0 = 0; | |
4344ee98 | 7706 | vcpu->arch.guest_xstate_size = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET; |
d7876f1b | 7707 | |
5a4f55cd EK |
7708 | vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu); |
7709 | ||
74545705 RK |
7710 | vcpu->arch.pat = MSR_IA32_CR_PAT_DEFAULT; |
7711 | ||
af585b92 | 7712 | kvm_async_pf_hash_reset(vcpu); |
f5132b01 | 7713 | kvm_pmu_init(vcpu); |
af585b92 | 7714 | |
1c1a9ce9 SR |
7715 | vcpu->arch.pending_external_vector = -1; |
7716 | ||
5c919412 AS |
7717 | kvm_hv_vcpu_init(vcpu); |
7718 | ||
e9b11c17 | 7719 | return 0; |
0ee6a517 | 7720 | |
f5f48ee1 SY |
7721 | fail_free_mce_banks: |
7722 | kfree(vcpu->arch.mce_banks); | |
443c39bc WY |
7723 | fail_free_lapic: |
7724 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
7725 | fail_mmu_destroy: |
7726 | kvm_mmu_destroy(vcpu); | |
7727 | fail_free_pio_data: | |
ad312c7c | 7728 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
7729 | fail: |
7730 | return r; | |
7731 | } | |
7732 | ||
7733 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
7734 | { | |
f656ce01 MT |
7735 | int idx; |
7736 | ||
1f4b34f8 | 7737 | kvm_hv_vcpu_uninit(vcpu); |
f5132b01 | 7738 | kvm_pmu_destroy(vcpu); |
36cb93fd | 7739 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 7740 | kvm_free_lapic(vcpu); |
f656ce01 | 7741 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 7742 | kvm_mmu_destroy(vcpu); |
f656ce01 | 7743 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 7744 | free_page((unsigned long)vcpu->arch.pio_data); |
35754c98 | 7745 | if (!lapic_in_kernel(vcpu)) |
54e9818f | 7746 | static_key_slow_dec(&kvm_no_apic_vcpu); |
e9b11c17 | 7747 | } |
d19a9cd2 | 7748 | |
e790d9ef RK |
7749 | void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) |
7750 | { | |
ae97a3b8 | 7751 | kvm_x86_ops->sched_in(vcpu, cpu); |
e790d9ef RK |
7752 | } |
7753 | ||
e08b9637 | 7754 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
d19a9cd2 | 7755 | { |
e08b9637 CO |
7756 | if (type) |
7757 | return -EINVAL; | |
7758 | ||
6ef768fa | 7759 | INIT_HLIST_HEAD(&kvm->arch.mask_notifier_list); |
f05e70ac | 7760 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
365c8868 | 7761 | INIT_LIST_HEAD(&kvm->arch.zapped_obsolete_pages); |
4d5c5d0f | 7762 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
e0f0bbc5 | 7763 | atomic_set(&kvm->arch.noncoherent_dma_count, 0); |
d19a9cd2 | 7764 | |
5550af4d SY |
7765 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
7766 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
7a84428a AW |
7767 | /* Reserve bit 1 of irq_sources_bitmap for irqfd-resampler */ |
7768 | set_bit(KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID, | |
7769 | &kvm->arch.irq_sources_bitmap); | |
5550af4d | 7770 | |
038f8c11 | 7771 | raw_spin_lock_init(&kvm->arch.tsc_write_lock); |
1e08ec4a | 7772 | mutex_init(&kvm->arch.apic_map_lock); |
d828199e MT |
7773 | spin_lock_init(&kvm->arch.pvclock_gtod_sync_lock); |
7774 | ||
7775 | pvclock_update_vm_gtod_copy(kvm); | |
53f658b3 | 7776 | |
7e44e449 | 7777 | INIT_DELAYED_WORK(&kvm->arch.kvmclock_update_work, kvmclock_update_fn); |
332967a3 | 7778 | INIT_DELAYED_WORK(&kvm->arch.kvmclock_sync_work, kvmclock_sync_fn); |
7e44e449 | 7779 | |
0eb05bf2 | 7780 | kvm_page_track_init(kvm); |
13d268ca | 7781 | kvm_mmu_init_vm(kvm); |
0eb05bf2 | 7782 | |
03543133 SS |
7783 | if (kvm_x86_ops->vm_init) |
7784 | return kvm_x86_ops->vm_init(kvm); | |
7785 | ||
d89f5eff | 7786 | return 0; |
d19a9cd2 ZX |
7787 | } |
7788 | ||
7789 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
7790 | { | |
9fc77441 MT |
7791 | int r; |
7792 | r = vcpu_load(vcpu); | |
7793 | BUG_ON(r); | |
d19a9cd2 ZX |
7794 | kvm_mmu_unload(vcpu); |
7795 | vcpu_put(vcpu); | |
7796 | } | |
7797 | ||
7798 | static void kvm_free_vcpus(struct kvm *kvm) | |
7799 | { | |
7800 | unsigned int i; | |
988a2cae | 7801 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
7802 | |
7803 | /* | |
7804 | * Unpin any mmu pages first. | |
7805 | */ | |
af585b92 GN |
7806 | kvm_for_each_vcpu(i, vcpu, kvm) { |
7807 | kvm_clear_async_pf_completion_queue(vcpu); | |
988a2cae | 7808 | kvm_unload_vcpu_mmu(vcpu); |
af585b92 | 7809 | } |
988a2cae GN |
7810 | kvm_for_each_vcpu(i, vcpu, kvm) |
7811 | kvm_arch_vcpu_free(vcpu); | |
7812 | ||
7813 | mutex_lock(&kvm->lock); | |
7814 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
7815 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 7816 | |
988a2cae GN |
7817 | atomic_set(&kvm->online_vcpus, 0); |
7818 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
7819 | } |
7820 | ||
ad8ba2cd SY |
7821 | void kvm_arch_sync_events(struct kvm *kvm) |
7822 | { | |
332967a3 | 7823 | cancel_delayed_work_sync(&kvm->arch.kvmclock_sync_work); |
7e44e449 | 7824 | cancel_delayed_work_sync(&kvm->arch.kvmclock_update_work); |
ba4cef31 | 7825 | kvm_free_all_assigned_devices(kvm); |
aea924f6 | 7826 | kvm_free_pit(kvm); |
ad8ba2cd SY |
7827 | } |
7828 | ||
1d8007bd | 7829 | int __x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size) |
9da0e4d5 PB |
7830 | { |
7831 | int i, r; | |
25188b99 | 7832 | unsigned long hva; |
f0d648bd PB |
7833 | struct kvm_memslots *slots = kvm_memslots(kvm); |
7834 | struct kvm_memory_slot *slot, old; | |
9da0e4d5 PB |
7835 | |
7836 | /* Called with kvm->slots_lock held. */ | |
1d8007bd PB |
7837 | if (WARN_ON(id >= KVM_MEM_SLOTS_NUM)) |
7838 | return -EINVAL; | |
9da0e4d5 | 7839 | |
f0d648bd PB |
7840 | slot = id_to_memslot(slots, id); |
7841 | if (size) { | |
b21629da | 7842 | if (slot->npages) |
f0d648bd PB |
7843 | return -EEXIST; |
7844 | ||
7845 | /* | |
7846 | * MAP_SHARED to prevent internal slot pages from being moved | |
7847 | * by fork()/COW. | |
7848 | */ | |
7849 | hva = vm_mmap(NULL, 0, size, PROT_READ | PROT_WRITE, | |
7850 | MAP_SHARED | MAP_ANONYMOUS, 0); | |
7851 | if (IS_ERR((void *)hva)) | |
7852 | return PTR_ERR((void *)hva); | |
7853 | } else { | |
7854 | if (!slot->npages) | |
7855 | return 0; | |
7856 | ||
7857 | hva = 0; | |
7858 | } | |
7859 | ||
7860 | old = *slot; | |
9da0e4d5 | 7861 | for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) { |
1d8007bd | 7862 | struct kvm_userspace_memory_region m; |
9da0e4d5 | 7863 | |
1d8007bd PB |
7864 | m.slot = id | (i << 16); |
7865 | m.flags = 0; | |
7866 | m.guest_phys_addr = gpa; | |
f0d648bd | 7867 | m.userspace_addr = hva; |
1d8007bd | 7868 | m.memory_size = size; |
9da0e4d5 PB |
7869 | r = __kvm_set_memory_region(kvm, &m); |
7870 | if (r < 0) | |
7871 | return r; | |
7872 | } | |
7873 | ||
f0d648bd PB |
7874 | if (!size) { |
7875 | r = vm_munmap(old.userspace_addr, old.npages * PAGE_SIZE); | |
7876 | WARN_ON(r < 0); | |
7877 | } | |
7878 | ||
9da0e4d5 PB |
7879 | return 0; |
7880 | } | |
7881 | EXPORT_SYMBOL_GPL(__x86_set_memory_region); | |
7882 | ||
1d8007bd | 7883 | int x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size) |
9da0e4d5 PB |
7884 | { |
7885 | int r; | |
7886 | ||
7887 | mutex_lock(&kvm->slots_lock); | |
1d8007bd | 7888 | r = __x86_set_memory_region(kvm, id, gpa, size); |
9da0e4d5 PB |
7889 | mutex_unlock(&kvm->slots_lock); |
7890 | ||
7891 | return r; | |
7892 | } | |
7893 | EXPORT_SYMBOL_GPL(x86_set_memory_region); | |
7894 | ||
d19a9cd2 ZX |
7895 | void kvm_arch_destroy_vm(struct kvm *kvm) |
7896 | { | |
27469d29 AH |
7897 | if (current->mm == kvm->mm) { |
7898 | /* | |
7899 | * Free memory regions allocated on behalf of userspace, | |
7900 | * unless the the memory map has changed due to process exit | |
7901 | * or fd copying. | |
7902 | */ | |
1d8007bd PB |
7903 | x86_set_memory_region(kvm, APIC_ACCESS_PAGE_PRIVATE_MEMSLOT, 0, 0); |
7904 | x86_set_memory_region(kvm, IDENTITY_PAGETABLE_PRIVATE_MEMSLOT, 0, 0); | |
7905 | x86_set_memory_region(kvm, TSS_PRIVATE_MEMSLOT, 0, 0); | |
27469d29 | 7906 | } |
03543133 SS |
7907 | if (kvm_x86_ops->vm_destroy) |
7908 | kvm_x86_ops->vm_destroy(kvm); | |
6eb55818 | 7909 | kvm_iommu_unmap_guest(kvm); |
d7deeeb0 ZX |
7910 | kfree(kvm->arch.vpic); |
7911 | kfree(kvm->arch.vioapic); | |
d19a9cd2 | 7912 | kvm_free_vcpus(kvm); |
1e08ec4a | 7913 | kfree(rcu_dereference_check(kvm->arch.apic_map, 1)); |
13d268ca | 7914 | kvm_mmu_uninit_vm(kvm); |
d19a9cd2 | 7915 | } |
0de10343 | 7916 | |
5587027c | 7917 | void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, |
db3fe4eb TY |
7918 | struct kvm_memory_slot *dont) |
7919 | { | |
7920 | int i; | |
7921 | ||
d89cc617 TY |
7922 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
7923 | if (!dont || free->arch.rmap[i] != dont->arch.rmap[i]) { | |
548ef284 | 7924 | kvfree(free->arch.rmap[i]); |
d89cc617 | 7925 | free->arch.rmap[i] = NULL; |
77d11309 | 7926 | } |
d89cc617 TY |
7927 | if (i == 0) |
7928 | continue; | |
7929 | ||
7930 | if (!dont || free->arch.lpage_info[i - 1] != | |
7931 | dont->arch.lpage_info[i - 1]) { | |
548ef284 | 7932 | kvfree(free->arch.lpage_info[i - 1]); |
d89cc617 | 7933 | free->arch.lpage_info[i - 1] = NULL; |
db3fe4eb TY |
7934 | } |
7935 | } | |
21ebbeda XG |
7936 | |
7937 | kvm_page_track_free_memslot(free, dont); | |
db3fe4eb TY |
7938 | } |
7939 | ||
5587027c AK |
7940 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
7941 | unsigned long npages) | |
db3fe4eb TY |
7942 | { |
7943 | int i; | |
7944 | ||
d89cc617 | 7945 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
92f94f1e | 7946 | struct kvm_lpage_info *linfo; |
db3fe4eb TY |
7947 | unsigned long ugfn; |
7948 | int lpages; | |
d89cc617 | 7949 | int level = i + 1; |
db3fe4eb TY |
7950 | |
7951 | lpages = gfn_to_index(slot->base_gfn + npages - 1, | |
7952 | slot->base_gfn, level) + 1; | |
7953 | ||
d89cc617 TY |
7954 | slot->arch.rmap[i] = |
7955 | kvm_kvzalloc(lpages * sizeof(*slot->arch.rmap[i])); | |
7956 | if (!slot->arch.rmap[i]) | |
77d11309 | 7957 | goto out_free; |
d89cc617 TY |
7958 | if (i == 0) |
7959 | continue; | |
77d11309 | 7960 | |
92f94f1e XG |
7961 | linfo = kvm_kvzalloc(lpages * sizeof(*linfo)); |
7962 | if (!linfo) | |
db3fe4eb TY |
7963 | goto out_free; |
7964 | ||
92f94f1e XG |
7965 | slot->arch.lpage_info[i - 1] = linfo; |
7966 | ||
db3fe4eb | 7967 | if (slot->base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1)) |
92f94f1e | 7968 | linfo[0].disallow_lpage = 1; |
db3fe4eb | 7969 | if ((slot->base_gfn + npages) & (KVM_PAGES_PER_HPAGE(level) - 1)) |
92f94f1e | 7970 | linfo[lpages - 1].disallow_lpage = 1; |
db3fe4eb TY |
7971 | ugfn = slot->userspace_addr >> PAGE_SHIFT; |
7972 | /* | |
7973 | * If the gfn and userspace address are not aligned wrt each | |
7974 | * other, or if explicitly asked to, disable large page | |
7975 | * support for this slot | |
7976 | */ | |
7977 | if ((slot->base_gfn ^ ugfn) & (KVM_PAGES_PER_HPAGE(level) - 1) || | |
7978 | !kvm_largepages_enabled()) { | |
7979 | unsigned long j; | |
7980 | ||
7981 | for (j = 0; j < lpages; ++j) | |
92f94f1e | 7982 | linfo[j].disallow_lpage = 1; |
db3fe4eb TY |
7983 | } |
7984 | } | |
7985 | ||
21ebbeda XG |
7986 | if (kvm_page_track_create_memslot(slot, npages)) |
7987 | goto out_free; | |
7988 | ||
db3fe4eb TY |
7989 | return 0; |
7990 | ||
7991 | out_free: | |
d89cc617 | 7992 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
548ef284 | 7993 | kvfree(slot->arch.rmap[i]); |
d89cc617 TY |
7994 | slot->arch.rmap[i] = NULL; |
7995 | if (i == 0) | |
7996 | continue; | |
7997 | ||
548ef284 | 7998 | kvfree(slot->arch.lpage_info[i - 1]); |
d89cc617 | 7999 | slot->arch.lpage_info[i - 1] = NULL; |
db3fe4eb TY |
8000 | } |
8001 | return -ENOMEM; | |
8002 | } | |
8003 | ||
15f46015 | 8004 | void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) |
e59dbe09 | 8005 | { |
e6dff7d1 TY |
8006 | /* |
8007 | * memslots->generation has been incremented. | |
8008 | * mmio generation may have reached its maximum value. | |
8009 | */ | |
54bf36aa | 8010 | kvm_mmu_invalidate_mmio_sptes(kvm, slots); |
e59dbe09 TY |
8011 | } |
8012 | ||
f7784b8e MT |
8013 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
8014 | struct kvm_memory_slot *memslot, | |
09170a49 | 8015 | const struct kvm_userspace_memory_region *mem, |
7b6195a9 | 8016 | enum kvm_mr_change change) |
0de10343 | 8017 | { |
f7784b8e MT |
8018 | return 0; |
8019 | } | |
8020 | ||
88178fd4 KH |
8021 | static void kvm_mmu_slot_apply_flags(struct kvm *kvm, |
8022 | struct kvm_memory_slot *new) | |
8023 | { | |
8024 | /* Still write protect RO slot */ | |
8025 | if (new->flags & KVM_MEM_READONLY) { | |
8026 | kvm_mmu_slot_remove_write_access(kvm, new); | |
8027 | return; | |
8028 | } | |
8029 | ||
8030 | /* | |
8031 | * Call kvm_x86_ops dirty logging hooks when they are valid. | |
8032 | * | |
8033 | * kvm_x86_ops->slot_disable_log_dirty is called when: | |
8034 | * | |
8035 | * - KVM_MR_CREATE with dirty logging is disabled | |
8036 | * - KVM_MR_FLAGS_ONLY with dirty logging is disabled in new flag | |
8037 | * | |
8038 | * The reason is, in case of PML, we need to set D-bit for any slots | |
8039 | * with dirty logging disabled in order to eliminate unnecessary GPA | |
8040 | * logging in PML buffer (and potential PML buffer full VMEXT). This | |
8041 | * guarantees leaving PML enabled during guest's lifetime won't have | |
8042 | * any additonal overhead from PML when guest is running with dirty | |
8043 | * logging disabled for memory slots. | |
8044 | * | |
8045 | * kvm_x86_ops->slot_enable_log_dirty is called when switching new slot | |
8046 | * to dirty logging mode. | |
8047 | * | |
8048 | * If kvm_x86_ops dirty logging hooks are invalid, use write protect. | |
8049 | * | |
8050 | * In case of write protect: | |
8051 | * | |
8052 | * Write protect all pages for dirty logging. | |
8053 | * | |
8054 | * All the sptes including the large sptes which point to this | |
8055 | * slot are set to readonly. We can not create any new large | |
8056 | * spte on this slot until the end of the logging. | |
8057 | * | |
8058 | * See the comments in fast_page_fault(). | |
8059 | */ | |
8060 | if (new->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
8061 | if (kvm_x86_ops->slot_enable_log_dirty) | |
8062 | kvm_x86_ops->slot_enable_log_dirty(kvm, new); | |
8063 | else | |
8064 | kvm_mmu_slot_remove_write_access(kvm, new); | |
8065 | } else { | |
8066 | if (kvm_x86_ops->slot_disable_log_dirty) | |
8067 | kvm_x86_ops->slot_disable_log_dirty(kvm, new); | |
8068 | } | |
8069 | } | |
8070 | ||
f7784b8e | 8071 | void kvm_arch_commit_memory_region(struct kvm *kvm, |
09170a49 | 8072 | const struct kvm_userspace_memory_region *mem, |
8482644a | 8073 | const struct kvm_memory_slot *old, |
f36f3f28 | 8074 | const struct kvm_memory_slot *new, |
8482644a | 8075 | enum kvm_mr_change change) |
f7784b8e | 8076 | { |
8482644a | 8077 | int nr_mmu_pages = 0; |
f7784b8e | 8078 | |
48c0e4e9 XG |
8079 | if (!kvm->arch.n_requested_mmu_pages) |
8080 | nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); | |
8081 | ||
48c0e4e9 | 8082 | if (nr_mmu_pages) |
0de10343 | 8083 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); |
1c91cad4 | 8084 | |
3ea3b7fa WL |
8085 | /* |
8086 | * Dirty logging tracks sptes in 4k granularity, meaning that large | |
8087 | * sptes have to be split. If live migration is successful, the guest | |
8088 | * in the source machine will be destroyed and large sptes will be | |
8089 | * created in the destination. However, if the guest continues to run | |
8090 | * in the source machine (for example if live migration fails), small | |
8091 | * sptes will remain around and cause bad performance. | |
8092 | * | |
8093 | * Scan sptes if dirty logging has been stopped, dropping those | |
8094 | * which can be collapsed into a single large-page spte. Later | |
8095 | * page faults will create the large-page sptes. | |
8096 | */ | |
8097 | if ((change != KVM_MR_DELETE) && | |
8098 | (old->flags & KVM_MEM_LOG_DIRTY_PAGES) && | |
8099 | !(new->flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8100 | kvm_mmu_zap_collapsible_sptes(kvm, new); | |
8101 | ||
c972f3b1 | 8102 | /* |
88178fd4 | 8103 | * Set up write protection and/or dirty logging for the new slot. |
c126d94f | 8104 | * |
88178fd4 KH |
8105 | * For KVM_MR_DELETE and KVM_MR_MOVE, the shadow pages of old slot have |
8106 | * been zapped so no dirty logging staff is needed for old slot. For | |
8107 | * KVM_MR_FLAGS_ONLY, the old slot is essentially the same one as the | |
8108 | * new and it's also covered when dealing with the new slot. | |
f36f3f28 PB |
8109 | * |
8110 | * FIXME: const-ify all uses of struct kvm_memory_slot. | |
c972f3b1 | 8111 | */ |
88178fd4 | 8112 | if (change != KVM_MR_DELETE) |
f36f3f28 | 8113 | kvm_mmu_slot_apply_flags(kvm, (struct kvm_memory_slot *) new); |
0de10343 | 8114 | } |
1d737c8a | 8115 | |
2df72e9b | 8116 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
34d4cb8f | 8117 | { |
6ca18b69 | 8118 | kvm_mmu_invalidate_zap_all_pages(kvm); |
34d4cb8f MT |
8119 | } |
8120 | ||
2df72e9b MT |
8121 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
8122 | struct kvm_memory_slot *slot) | |
8123 | { | |
6ca18b69 | 8124 | kvm_mmu_invalidate_zap_all_pages(kvm); |
2df72e9b MT |
8125 | } |
8126 | ||
5d9bc648 PB |
8127 | static inline bool kvm_vcpu_has_events(struct kvm_vcpu *vcpu) |
8128 | { | |
8129 | if (!list_empty_careful(&vcpu->async_pf.done)) | |
8130 | return true; | |
8131 | ||
8132 | if (kvm_apic_has_events(vcpu)) | |
8133 | return true; | |
8134 | ||
8135 | if (vcpu->arch.pv.pv_unhalted) | |
8136 | return true; | |
8137 | ||
8138 | if (atomic_read(&vcpu->arch.nmi_queued)) | |
8139 | return true; | |
8140 | ||
73917739 PB |
8141 | if (test_bit(KVM_REQ_SMI, &vcpu->requests)) |
8142 | return true; | |
8143 | ||
5d9bc648 PB |
8144 | if (kvm_arch_interrupt_allowed(vcpu) && |
8145 | kvm_cpu_has_interrupt(vcpu)) | |
8146 | return true; | |
8147 | ||
1f4b34f8 AS |
8148 | if (kvm_hv_has_stimer_pending(vcpu)) |
8149 | return true; | |
8150 | ||
5d9bc648 PB |
8151 | return false; |
8152 | } | |
8153 | ||
1d737c8a ZX |
8154 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
8155 | { | |
b6b8a145 JK |
8156 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) |
8157 | kvm_x86_ops->check_nested_events(vcpu, false); | |
8158 | ||
5d9bc648 | 8159 | return kvm_vcpu_running(vcpu) || kvm_vcpu_has_events(vcpu); |
1d737c8a | 8160 | } |
5736199a | 8161 | |
b6d33834 | 8162 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
5736199a | 8163 | { |
b6d33834 | 8164 | return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; |
5736199a | 8165 | } |
78646121 GN |
8166 | |
8167 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
8168 | { | |
8169 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
8170 | } | |
229456fc | 8171 | |
82b32774 | 8172 | unsigned long kvm_get_linear_rip(struct kvm_vcpu *vcpu) |
f92653ee | 8173 | { |
82b32774 NA |
8174 | if (is_64_bit_mode(vcpu)) |
8175 | return kvm_rip_read(vcpu); | |
8176 | return (u32)(get_segment_base(vcpu, VCPU_SREG_CS) + | |
8177 | kvm_rip_read(vcpu)); | |
8178 | } | |
8179 | EXPORT_SYMBOL_GPL(kvm_get_linear_rip); | |
f92653ee | 8180 | |
82b32774 NA |
8181 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
8182 | { | |
8183 | return kvm_get_linear_rip(vcpu) == linear_rip; | |
f92653ee JK |
8184 | } |
8185 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); | |
8186 | ||
94fe45da JK |
8187 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
8188 | { | |
8189 | unsigned long rflags; | |
8190 | ||
8191 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
8192 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
c310bac5 | 8193 | rflags &= ~X86_EFLAGS_TF; |
94fe45da JK |
8194 | return rflags; |
8195 | } | |
8196 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
8197 | ||
6addfc42 | 8198 | static void __kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) |
94fe45da JK |
8199 | { |
8200 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
f92653ee | 8201 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
c310bac5 | 8202 | rflags |= X86_EFLAGS_TF; |
94fe45da | 8203 | kvm_x86_ops->set_rflags(vcpu, rflags); |
6addfc42 PB |
8204 | } |
8205 | ||
8206 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
8207 | { | |
8208 | __kvm_set_rflags(vcpu, rflags); | |
3842d135 | 8209 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
94fe45da JK |
8210 | } |
8211 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
8212 | ||
56028d08 GN |
8213 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work) |
8214 | { | |
8215 | int r; | |
8216 | ||
fb67e14f | 8217 | if ((vcpu->arch.mmu.direct_map != work->arch.direct_map) || |
f2e10669 | 8218 | work->wakeup_all) |
56028d08 GN |
8219 | return; |
8220 | ||
8221 | r = kvm_mmu_reload(vcpu); | |
8222 | if (unlikely(r)) | |
8223 | return; | |
8224 | ||
fb67e14f XG |
8225 | if (!vcpu->arch.mmu.direct_map && |
8226 | work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu)) | |
8227 | return; | |
8228 | ||
56028d08 GN |
8229 | vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true); |
8230 | } | |
8231 | ||
af585b92 GN |
8232 | static inline u32 kvm_async_pf_hash_fn(gfn_t gfn) |
8233 | { | |
8234 | return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU)); | |
8235 | } | |
8236 | ||
8237 | static inline u32 kvm_async_pf_next_probe(u32 key) | |
8238 | { | |
8239 | return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1); | |
8240 | } | |
8241 | ||
8242 | static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
8243 | { | |
8244 | u32 key = kvm_async_pf_hash_fn(gfn); | |
8245 | ||
8246 | while (vcpu->arch.apf.gfns[key] != ~0) | |
8247 | key = kvm_async_pf_next_probe(key); | |
8248 | ||
8249 | vcpu->arch.apf.gfns[key] = gfn; | |
8250 | } | |
8251 | ||
8252 | static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn) | |
8253 | { | |
8254 | int i; | |
8255 | u32 key = kvm_async_pf_hash_fn(gfn); | |
8256 | ||
8257 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) && | |
c7d28c24 XG |
8258 | (vcpu->arch.apf.gfns[key] != gfn && |
8259 | vcpu->arch.apf.gfns[key] != ~0); i++) | |
af585b92 GN |
8260 | key = kvm_async_pf_next_probe(key); |
8261 | ||
8262 | return key; | |
8263 | } | |
8264 | ||
8265 | bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
8266 | { | |
8267 | return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn; | |
8268 | } | |
8269 | ||
8270 | static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
8271 | { | |
8272 | u32 i, j, k; | |
8273 | ||
8274 | i = j = kvm_async_pf_gfn_slot(vcpu, gfn); | |
8275 | while (true) { | |
8276 | vcpu->arch.apf.gfns[i] = ~0; | |
8277 | do { | |
8278 | j = kvm_async_pf_next_probe(j); | |
8279 | if (vcpu->arch.apf.gfns[j] == ~0) | |
8280 | return; | |
8281 | k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]); | |
8282 | /* | |
8283 | * k lies cyclically in ]i,j] | |
8284 | * | i.k.j | | |
8285 | * |....j i.k.| or |.k..j i...| | |
8286 | */ | |
8287 | } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j)); | |
8288 | vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j]; | |
8289 | i = j; | |
8290 | } | |
8291 | } | |
8292 | ||
7c90705b GN |
8293 | static int apf_put_user(struct kvm_vcpu *vcpu, u32 val) |
8294 | { | |
8295 | ||
8296 | return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val, | |
8297 | sizeof(val)); | |
8298 | } | |
8299 | ||
af585b92 GN |
8300 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
8301 | struct kvm_async_pf *work) | |
8302 | { | |
6389ee94 AK |
8303 | struct x86_exception fault; |
8304 | ||
7c90705b | 8305 | trace_kvm_async_pf_not_present(work->arch.token, work->gva); |
af585b92 | 8306 | kvm_add_async_pf_gfn(vcpu, work->arch.gfn); |
7c90705b GN |
8307 | |
8308 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) || | |
fc5f06fa GN |
8309 | (vcpu->arch.apf.send_user_only && |
8310 | kvm_x86_ops->get_cpl(vcpu) == 0)) | |
7c90705b GN |
8311 | kvm_make_request(KVM_REQ_APF_HALT, vcpu); |
8312 | else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) { | |
6389ee94 AK |
8313 | fault.vector = PF_VECTOR; |
8314 | fault.error_code_valid = true; | |
8315 | fault.error_code = 0; | |
8316 | fault.nested_page_fault = false; | |
8317 | fault.address = work->arch.token; | |
8318 | kvm_inject_page_fault(vcpu, &fault); | |
7c90705b | 8319 | } |
af585b92 GN |
8320 | } |
8321 | ||
8322 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
8323 | struct kvm_async_pf *work) | |
8324 | { | |
6389ee94 AK |
8325 | struct x86_exception fault; |
8326 | ||
7c90705b | 8327 | trace_kvm_async_pf_ready(work->arch.token, work->gva); |
f2e10669 | 8328 | if (work->wakeup_all) |
7c90705b GN |
8329 | work->arch.token = ~0; /* broadcast wakeup */ |
8330 | else | |
8331 | kvm_del_async_pf_gfn(vcpu, work->arch.gfn); | |
8332 | ||
8333 | if ((vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) && | |
8334 | !apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) { | |
6389ee94 AK |
8335 | fault.vector = PF_VECTOR; |
8336 | fault.error_code_valid = true; | |
8337 | fault.error_code = 0; | |
8338 | fault.nested_page_fault = false; | |
8339 | fault.address = work->arch.token; | |
8340 | kvm_inject_page_fault(vcpu, &fault); | |
7c90705b | 8341 | } |
e6d53e3b | 8342 | vcpu->arch.apf.halted = false; |
a4fa1635 | 8343 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
7c90705b GN |
8344 | } |
8345 | ||
8346 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
8347 | { | |
8348 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED)) | |
8349 | return true; | |
8350 | else | |
8351 | return !kvm_event_needs_reinjection(vcpu) && | |
8352 | kvm_x86_ops->interrupt_allowed(vcpu); | |
af585b92 GN |
8353 | } |
8354 | ||
5544eb9b PB |
8355 | void kvm_arch_start_assignment(struct kvm *kvm) |
8356 | { | |
8357 | atomic_inc(&kvm->arch.assigned_device_count); | |
8358 | } | |
8359 | EXPORT_SYMBOL_GPL(kvm_arch_start_assignment); | |
8360 | ||
8361 | void kvm_arch_end_assignment(struct kvm *kvm) | |
8362 | { | |
8363 | atomic_dec(&kvm->arch.assigned_device_count); | |
8364 | } | |
8365 | EXPORT_SYMBOL_GPL(kvm_arch_end_assignment); | |
8366 | ||
8367 | bool kvm_arch_has_assigned_device(struct kvm *kvm) | |
8368 | { | |
8369 | return atomic_read(&kvm->arch.assigned_device_count); | |
8370 | } | |
8371 | EXPORT_SYMBOL_GPL(kvm_arch_has_assigned_device); | |
8372 | ||
e0f0bbc5 AW |
8373 | void kvm_arch_register_noncoherent_dma(struct kvm *kvm) |
8374 | { | |
8375 | atomic_inc(&kvm->arch.noncoherent_dma_count); | |
8376 | } | |
8377 | EXPORT_SYMBOL_GPL(kvm_arch_register_noncoherent_dma); | |
8378 | ||
8379 | void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm) | |
8380 | { | |
8381 | atomic_dec(&kvm->arch.noncoherent_dma_count); | |
8382 | } | |
8383 | EXPORT_SYMBOL_GPL(kvm_arch_unregister_noncoherent_dma); | |
8384 | ||
8385 | bool kvm_arch_has_noncoherent_dma(struct kvm *kvm) | |
8386 | { | |
8387 | return atomic_read(&kvm->arch.noncoherent_dma_count); | |
8388 | } | |
8389 | EXPORT_SYMBOL_GPL(kvm_arch_has_noncoherent_dma); | |
8390 | ||
14717e20 AW |
8391 | bool kvm_arch_has_irq_bypass(void) |
8392 | { | |
8393 | return kvm_x86_ops->update_pi_irte != NULL; | |
8394 | } | |
8395 | ||
87276880 FW |
8396 | int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons, |
8397 | struct irq_bypass_producer *prod) | |
8398 | { | |
8399 | struct kvm_kernel_irqfd *irqfd = | |
8400 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
8401 | ||
14717e20 | 8402 | irqfd->producer = prod; |
87276880 | 8403 | |
14717e20 AW |
8404 | return kvm_x86_ops->update_pi_irte(irqfd->kvm, |
8405 | prod->irq, irqfd->gsi, 1); | |
87276880 FW |
8406 | } |
8407 | ||
8408 | void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons, | |
8409 | struct irq_bypass_producer *prod) | |
8410 | { | |
8411 | int ret; | |
8412 | struct kvm_kernel_irqfd *irqfd = | |
8413 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
8414 | ||
87276880 FW |
8415 | WARN_ON(irqfd->producer != prod); |
8416 | irqfd->producer = NULL; | |
8417 | ||
8418 | /* | |
8419 | * When producer of consumer is unregistered, we change back to | |
8420 | * remapped mode, so we can re-use the current implementation | |
8421 | * when the irq is masked/disabed or the consumer side (KVM | |
8422 | * int this case doesn't want to receive the interrupts. | |
8423 | */ | |
8424 | ret = kvm_x86_ops->update_pi_irte(irqfd->kvm, prod->irq, irqfd->gsi, 0); | |
8425 | if (ret) | |
8426 | printk(KERN_INFO "irq bypass consumer (token %p) unregistration" | |
8427 | " fails: %d\n", irqfd->consumer.token, ret); | |
8428 | } | |
8429 | ||
8430 | int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq, | |
8431 | uint32_t guest_irq, bool set) | |
8432 | { | |
8433 | if (!kvm_x86_ops->update_pi_irte) | |
8434 | return -EINVAL; | |
8435 | ||
8436 | return kvm_x86_ops->update_pi_irte(kvm, host_irq, guest_irq, set); | |
8437 | } | |
8438 | ||
52004014 FW |
8439 | bool kvm_vector_hashing_enabled(void) |
8440 | { | |
8441 | return vector_hashing; | |
8442 | } | |
8443 | EXPORT_SYMBOL_GPL(kvm_vector_hashing_enabled); | |
8444 | ||
229456fc | 8445 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
931c33b1 | 8446 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_fast_mmio); |
229456fc MT |
8447 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); |
8448 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
8449 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
8450 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 8451 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 8452 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 8453 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 8454 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 8455 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 8456 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
2e554e8d | 8457 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |
489223ed | 8458 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_write_tsc_offset); |
7b46268d | 8459 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ple_window); |
843e4330 | 8460 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pml_full); |
efc64404 | 8461 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pi_irte_update); |
18f40c53 SS |
8462 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_unaccelerated_access); |
8463 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_incomplete_ipi); |