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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" |
474a5bb9 | 30 | #include "pmu.h" |
e83d5887 | 31 | #include "hyperv.h" |
313a3dc7 | 32 | |
18068523 | 33 | #include <linux/clocksource.h> |
4d5c5d0f | 34 | #include <linux/interrupt.h> |
313a3dc7 CO |
35 | #include <linux/kvm.h> |
36 | #include <linux/fs.h> | |
37 | #include <linux/vmalloc.h> | |
1767e931 PG |
38 | #include <linux/export.h> |
39 | #include <linux/moduleparam.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> | |
3905f9ad | 56 | #include <linux/sched/stat.h> |
d0ec49d4 | 57 | #include <linux/mem_encrypt.h> |
3905f9ad | 58 | |
aec51dc4 | 59 | #include <trace/events/kvm.h> |
2ed152af | 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 | |
d1898b73 DH |
71 | #define CREATE_TRACE_POINTS |
72 | #include "trace.h" | |
73 | ||
313a3dc7 | 74 | #define MAX_IO_MSRS 256 |
890ca9ae | 75 | #define KVM_MAX_MCE_BANKS 32 |
c45dcc71 AR |
76 | u64 __read_mostly kvm_mce_cap_supported = MCG_CTL_P | MCG_SER_P; |
77 | EXPORT_SYMBOL_GPL(kvm_mce_cap_supported); | |
890ca9ae | 78 | |
0f65dd70 AK |
79 | #define emul_to_vcpu(ctxt) \ |
80 | container_of(ctxt, struct kvm_vcpu, arch.emulate_ctxt) | |
81 | ||
50a37eb4 JR |
82 | /* EFER defaults: |
83 | * - enable syscall per default because its emulated by KVM | |
84 | * - enable LME and LMA per default on 64 bit KVM | |
85 | */ | |
86 | #ifdef CONFIG_X86_64 | |
1260edbe LJ |
87 | static |
88 | u64 __read_mostly efer_reserved_bits = ~((u64)(EFER_SCE | EFER_LME | EFER_LMA)); | |
50a37eb4 | 89 | #else |
1260edbe | 90 | static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE); |
50a37eb4 | 91 | #endif |
313a3dc7 | 92 | |
ba1389b7 AK |
93 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
94 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 95 | |
c519265f RK |
96 | #define KVM_X2APIC_API_VALID_FLAGS (KVM_X2APIC_API_USE_32BIT_IDS | \ |
97 | KVM_X2APIC_API_DISABLE_BROADCAST_QUIRK) | |
37131313 | 98 | |
cb142eb7 | 99 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
7460fb4a | 100 | static void process_nmi(struct kvm_vcpu *vcpu); |
ee2cd4b7 | 101 | static void enter_smm(struct kvm_vcpu *vcpu); |
6addfc42 | 102 | static void __kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); |
674eea0f | 103 | |
893590c7 | 104 | struct kvm_x86_ops *kvm_x86_ops __read_mostly; |
5fdbf976 | 105 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 106 | |
893590c7 | 107 | static bool __read_mostly ignore_msrs = 0; |
476bc001 | 108 | module_param(ignore_msrs, bool, S_IRUGO | S_IWUSR); |
ed85c068 | 109 | |
9ed96e87 MT |
110 | unsigned int min_timer_period_us = 500; |
111 | module_param(min_timer_period_us, uint, S_IRUGO | S_IWUSR); | |
112 | ||
630994b3 MT |
113 | static bool __read_mostly kvmclock_periodic_sync = true; |
114 | module_param(kvmclock_periodic_sync, bool, S_IRUGO); | |
115 | ||
893590c7 | 116 | bool __read_mostly kvm_has_tsc_control; |
92a1f12d | 117 | EXPORT_SYMBOL_GPL(kvm_has_tsc_control); |
893590c7 | 118 | u32 __read_mostly kvm_max_guest_tsc_khz; |
92a1f12d | 119 | EXPORT_SYMBOL_GPL(kvm_max_guest_tsc_khz); |
bc9b961b HZ |
120 | u8 __read_mostly kvm_tsc_scaling_ratio_frac_bits; |
121 | EXPORT_SYMBOL_GPL(kvm_tsc_scaling_ratio_frac_bits); | |
122 | u64 __read_mostly kvm_max_tsc_scaling_ratio; | |
123 | EXPORT_SYMBOL_GPL(kvm_max_tsc_scaling_ratio); | |
64672c95 YJ |
124 | u64 __read_mostly kvm_default_tsc_scaling_ratio; |
125 | EXPORT_SYMBOL_GPL(kvm_default_tsc_scaling_ratio); | |
92a1f12d | 126 | |
cc578287 | 127 | /* tsc tolerance in parts per million - default to 1/2 of the NTP threshold */ |
893590c7 | 128 | static u32 __read_mostly tsc_tolerance_ppm = 250; |
cc578287 ZA |
129 | module_param(tsc_tolerance_ppm, uint, S_IRUGO | S_IWUSR); |
130 | ||
d0659d94 | 131 | /* lapic timer advance (tscdeadline mode only) in nanoseconds */ |
893590c7 | 132 | unsigned int __read_mostly lapic_timer_advance_ns = 0; |
d0659d94 MT |
133 | module_param(lapic_timer_advance_ns, uint, S_IRUGO | S_IWUSR); |
134 | ||
52004014 FW |
135 | static bool __read_mostly vector_hashing = true; |
136 | module_param(vector_hashing, bool, S_IRUGO); | |
137 | ||
18863bdd AK |
138 | #define KVM_NR_SHARED_MSRS 16 |
139 | ||
140 | struct kvm_shared_msrs_global { | |
141 | int nr; | |
2bf78fa7 | 142 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
143 | }; |
144 | ||
145 | struct kvm_shared_msrs { | |
146 | struct user_return_notifier urn; | |
147 | bool registered; | |
2bf78fa7 SY |
148 | struct kvm_shared_msr_values { |
149 | u64 host; | |
150 | u64 curr; | |
151 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
152 | }; |
153 | ||
154 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
013f6a5d | 155 | static struct kvm_shared_msrs __percpu *shared_msrs; |
18863bdd | 156 | |
417bc304 | 157 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
158 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
159 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
160 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
161 | { "invlpg", VCPU_STAT(invlpg) }, | |
162 | { "exits", VCPU_STAT(exits) }, | |
163 | { "io_exits", VCPU_STAT(io_exits) }, | |
164 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
165 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
166 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 167 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 | 168 | { "halt_exits", VCPU_STAT(halt_exits) }, |
f7819512 | 169 | { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, |
62bea5bf | 170 | { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) }, |
3491caf2 | 171 | { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) }, |
ba1389b7 | 172 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f11c3a8d | 173 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
174 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
175 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
176 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
177 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
178 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
179 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
180 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 181 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 182 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
0f1e261e | 183 | { "req_event", VCPU_STAT(req_event) }, |
4cee5764 AK |
184 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
185 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
186 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
187 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
188 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
189 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 190 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 191 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 192 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 193 | { "largepages", VM_STAT(lpages) }, |
f3414bc7 DM |
194 | { "max_mmu_page_hash_collisions", |
195 | VM_STAT(max_mmu_page_hash_collisions) }, | |
417bc304 HB |
196 | { NULL } |
197 | }; | |
198 | ||
2acf923e DC |
199 | u64 __read_mostly host_xcr0; |
200 | ||
b6785def | 201 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt); |
d6aa1000 | 202 | |
af585b92 GN |
203 | static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu) |
204 | { | |
205 | int i; | |
206 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU); i++) | |
207 | vcpu->arch.apf.gfns[i] = ~0; | |
208 | } | |
209 | ||
18863bdd AK |
210 | static void kvm_on_user_return(struct user_return_notifier *urn) |
211 | { | |
212 | unsigned slot; | |
18863bdd AK |
213 | struct kvm_shared_msrs *locals |
214 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 215 | struct kvm_shared_msr_values *values; |
1650b4eb IA |
216 | unsigned long flags; |
217 | ||
218 | /* | |
219 | * Disabling irqs at this point since the following code could be | |
220 | * interrupted and executed through kvm_arch_hardware_disable() | |
221 | */ | |
222 | local_irq_save(flags); | |
223 | if (locals->registered) { | |
224 | locals->registered = false; | |
225 | user_return_notifier_unregister(urn); | |
226 | } | |
227 | local_irq_restore(flags); | |
18863bdd | 228 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { |
2bf78fa7 SY |
229 | values = &locals->values[slot]; |
230 | if (values->host != values->curr) { | |
231 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
232 | values->curr = values->host; | |
18863bdd AK |
233 | } |
234 | } | |
18863bdd AK |
235 | } |
236 | ||
2bf78fa7 | 237 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 238 | { |
18863bdd | 239 | u64 value; |
013f6a5d MT |
240 | unsigned int cpu = smp_processor_id(); |
241 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
18863bdd | 242 | |
2bf78fa7 SY |
243 | /* only read, and nobody should modify it at this time, |
244 | * so don't need lock */ | |
245 | if (slot >= shared_msrs_global.nr) { | |
246 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
247 | return; | |
248 | } | |
249 | rdmsrl_safe(msr, &value); | |
250 | smsr->values[slot].host = value; | |
251 | smsr->values[slot].curr = value; | |
252 | } | |
253 | ||
254 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
255 | { | |
0123be42 | 256 | BUG_ON(slot >= KVM_NR_SHARED_MSRS); |
c847fe88 | 257 | shared_msrs_global.msrs[slot] = msr; |
18863bdd AK |
258 | if (slot >= shared_msrs_global.nr) |
259 | shared_msrs_global.nr = slot + 1; | |
18863bdd AK |
260 | } |
261 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
262 | ||
263 | static void kvm_shared_msr_cpu_online(void) | |
264 | { | |
265 | unsigned i; | |
18863bdd AK |
266 | |
267 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 268 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
269 | } |
270 | ||
8b3c3104 | 271 | int kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd | 272 | { |
013f6a5d MT |
273 | unsigned int cpu = smp_processor_id(); |
274 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
8b3c3104 | 275 | int err; |
18863bdd | 276 | |
2bf78fa7 | 277 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
8b3c3104 | 278 | return 0; |
2bf78fa7 | 279 | smsr->values[slot].curr = value; |
8b3c3104 AH |
280 | err = wrmsrl_safe(shared_msrs_global.msrs[slot], value); |
281 | if (err) | |
282 | return 1; | |
283 | ||
18863bdd AK |
284 | if (!smsr->registered) { |
285 | smsr->urn.on_user_return = kvm_on_user_return; | |
286 | user_return_notifier_register(&smsr->urn); | |
287 | smsr->registered = true; | |
288 | } | |
8b3c3104 | 289 | return 0; |
18863bdd AK |
290 | } |
291 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
292 | ||
13a34e06 | 293 | static void drop_user_return_notifiers(void) |
3548bab5 | 294 | { |
013f6a5d MT |
295 | unsigned int cpu = smp_processor_id(); |
296 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
3548bab5 AK |
297 | |
298 | if (smsr->registered) | |
299 | kvm_on_user_return(&smsr->urn); | |
300 | } | |
301 | ||
6866b83e CO |
302 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
303 | { | |
8a5a87d9 | 304 | return vcpu->arch.apic_base; |
6866b83e CO |
305 | } |
306 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
307 | ||
58cb628d JK |
308 | int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
309 | { | |
310 | u64 old_state = vcpu->arch.apic_base & | |
311 | (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); | |
312 | u64 new_state = msr_info->data & | |
313 | (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); | |
d6321d49 RK |
314 | u64 reserved_bits = ((~0ULL) << cpuid_maxphyaddr(vcpu)) | 0x2ff | |
315 | (guest_cpuid_has(vcpu, X86_FEATURE_X2APIC) ? 0 : X2APIC_ENABLE); | |
58cb628d | 316 | |
d3802286 JM |
317 | if ((msr_info->data & reserved_bits) || new_state == X2APIC_ENABLE) |
318 | return 1; | |
58cb628d | 319 | if (!msr_info->host_initiated && |
d3802286 | 320 | ((new_state == MSR_IA32_APICBASE_ENABLE && |
58cb628d JK |
321 | old_state == (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE)) || |
322 | (new_state == (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE) && | |
323 | old_state == 0))) | |
324 | return 1; | |
325 | ||
326 | kvm_lapic_set_base(vcpu, msr_info->data); | |
327 | return 0; | |
6866b83e CO |
328 | } |
329 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
330 | ||
2605fc21 | 331 | asmlinkage __visible void kvm_spurious_fault(void) |
e3ba45b8 GL |
332 | { |
333 | /* Fault while not rebooting. We want the trace. */ | |
334 | BUG(); | |
335 | } | |
336 | EXPORT_SYMBOL_GPL(kvm_spurious_fault); | |
337 | ||
3fd28fce ED |
338 | #define EXCPT_BENIGN 0 |
339 | #define EXCPT_CONTRIBUTORY 1 | |
340 | #define EXCPT_PF 2 | |
341 | ||
342 | static int exception_class(int vector) | |
343 | { | |
344 | switch (vector) { | |
345 | case PF_VECTOR: | |
346 | return EXCPT_PF; | |
347 | case DE_VECTOR: | |
348 | case TS_VECTOR: | |
349 | case NP_VECTOR: | |
350 | case SS_VECTOR: | |
351 | case GP_VECTOR: | |
352 | return EXCPT_CONTRIBUTORY; | |
353 | default: | |
354 | break; | |
355 | } | |
356 | return EXCPT_BENIGN; | |
357 | } | |
358 | ||
d6e8c854 NA |
359 | #define EXCPT_FAULT 0 |
360 | #define EXCPT_TRAP 1 | |
361 | #define EXCPT_ABORT 2 | |
362 | #define EXCPT_INTERRUPT 3 | |
363 | ||
364 | static int exception_type(int vector) | |
365 | { | |
366 | unsigned int mask; | |
367 | ||
368 | if (WARN_ON(vector > 31 || vector == NMI_VECTOR)) | |
369 | return EXCPT_INTERRUPT; | |
370 | ||
371 | mask = 1 << vector; | |
372 | ||
373 | /* #DB is trap, as instruction watchpoints are handled elsewhere */ | |
374 | if (mask & ((1 << DB_VECTOR) | (1 << BP_VECTOR) | (1 << OF_VECTOR))) | |
375 | return EXCPT_TRAP; | |
376 | ||
377 | if (mask & ((1 << DF_VECTOR) | (1 << MC_VECTOR))) | |
378 | return EXCPT_ABORT; | |
379 | ||
380 | /* Reserved exceptions will result in fault */ | |
381 | return EXCPT_FAULT; | |
382 | } | |
383 | ||
3fd28fce | 384 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, |
ce7ddec4 JR |
385 | unsigned nr, bool has_error, u32 error_code, |
386 | bool reinject) | |
3fd28fce ED |
387 | { |
388 | u32 prev_nr; | |
389 | int class1, class2; | |
390 | ||
3842d135 AK |
391 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
392 | ||
664f8e26 | 393 | if (!vcpu->arch.exception.pending && !vcpu->arch.exception.injected) { |
3fd28fce | 394 | queue: |
3ffb2468 NA |
395 | if (has_error && !is_protmode(vcpu)) |
396 | has_error = false; | |
664f8e26 WL |
397 | if (reinject) { |
398 | /* | |
399 | * On vmentry, vcpu->arch.exception.pending is only | |
400 | * true if an event injection was blocked by | |
401 | * nested_run_pending. In that case, however, | |
402 | * vcpu_enter_guest requests an immediate exit, | |
403 | * and the guest shouldn't proceed far enough to | |
404 | * need reinjection. | |
405 | */ | |
406 | WARN_ON_ONCE(vcpu->arch.exception.pending); | |
407 | vcpu->arch.exception.injected = true; | |
408 | } else { | |
409 | vcpu->arch.exception.pending = true; | |
410 | vcpu->arch.exception.injected = false; | |
411 | } | |
3fd28fce ED |
412 | vcpu->arch.exception.has_error_code = has_error; |
413 | vcpu->arch.exception.nr = nr; | |
414 | vcpu->arch.exception.error_code = error_code; | |
415 | return; | |
416 | } | |
417 | ||
418 | /* to check exception */ | |
419 | prev_nr = vcpu->arch.exception.nr; | |
420 | if (prev_nr == DF_VECTOR) { | |
421 | /* triple fault -> shutdown */ | |
a8eeb04a | 422 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
3fd28fce ED |
423 | return; |
424 | } | |
425 | class1 = exception_class(prev_nr); | |
426 | class2 = exception_class(nr); | |
427 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
428 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
664f8e26 WL |
429 | /* |
430 | * Generate double fault per SDM Table 5-5. Set | |
431 | * exception.pending = true so that the double fault | |
432 | * can trigger a nested vmexit. | |
433 | */ | |
3fd28fce | 434 | vcpu->arch.exception.pending = true; |
664f8e26 | 435 | vcpu->arch.exception.injected = false; |
3fd28fce ED |
436 | vcpu->arch.exception.has_error_code = true; |
437 | vcpu->arch.exception.nr = DF_VECTOR; | |
438 | vcpu->arch.exception.error_code = 0; | |
439 | } else | |
440 | /* replace previous exception with a new one in a hope | |
441 | that instruction re-execution will regenerate lost | |
442 | exception */ | |
443 | goto queue; | |
444 | } | |
445 | ||
298101da AK |
446 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
447 | { | |
ce7ddec4 | 448 | kvm_multiple_exception(vcpu, nr, false, 0, false); |
298101da AK |
449 | } |
450 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
451 | ||
ce7ddec4 JR |
452 | void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
453 | { | |
454 | kvm_multiple_exception(vcpu, nr, false, 0, true); | |
455 | } | |
456 | EXPORT_SYMBOL_GPL(kvm_requeue_exception); | |
457 | ||
6affcbed | 458 | int kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err) |
c3c91fee | 459 | { |
db8fcefa AP |
460 | if (err) |
461 | kvm_inject_gp(vcpu, 0); | |
462 | else | |
6affcbed KH |
463 | return kvm_skip_emulated_instruction(vcpu); |
464 | ||
465 | return 1; | |
db8fcefa AP |
466 | } |
467 | EXPORT_SYMBOL_GPL(kvm_complete_insn_gp); | |
8df25a32 | 468 | |
6389ee94 | 469 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
c3c91fee AK |
470 | { |
471 | ++vcpu->stat.pf_guest; | |
adfe20fb WL |
472 | vcpu->arch.exception.nested_apf = |
473 | is_guest_mode(vcpu) && fault->async_page_fault; | |
474 | if (vcpu->arch.exception.nested_apf) | |
475 | vcpu->arch.apf.nested_apf_token = fault->address; | |
476 | else | |
477 | vcpu->arch.cr2 = fault->address; | |
6389ee94 | 478 | kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code); |
c3c91fee | 479 | } |
27d6c865 | 480 | EXPORT_SYMBOL_GPL(kvm_inject_page_fault); |
c3c91fee | 481 | |
ef54bcfe | 482 | static bool kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
d4f8cf66 | 483 | { |
6389ee94 AK |
484 | if (mmu_is_nested(vcpu) && !fault->nested_page_fault) |
485 | vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault); | |
d4f8cf66 | 486 | else |
6389ee94 | 487 | vcpu->arch.mmu.inject_page_fault(vcpu, fault); |
ef54bcfe PB |
488 | |
489 | return fault->nested_page_fault; | |
d4f8cf66 JR |
490 | } |
491 | ||
3419ffc8 SY |
492 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
493 | { | |
7460fb4a AK |
494 | atomic_inc(&vcpu->arch.nmi_queued); |
495 | kvm_make_request(KVM_REQ_NMI, vcpu); | |
3419ffc8 SY |
496 | } |
497 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
498 | ||
298101da AK |
499 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
500 | { | |
ce7ddec4 | 501 | kvm_multiple_exception(vcpu, nr, true, error_code, false); |
298101da AK |
502 | } |
503 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
504 | ||
ce7ddec4 JR |
505 | void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
506 | { | |
507 | kvm_multiple_exception(vcpu, nr, true, error_code, true); | |
508 | } | |
509 | EXPORT_SYMBOL_GPL(kvm_requeue_exception_e); | |
510 | ||
0a79b009 AK |
511 | /* |
512 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
513 | * a #GP and return false. | |
514 | */ | |
515 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 516 | { |
0a79b009 AK |
517 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
518 | return true; | |
519 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
520 | return false; | |
298101da | 521 | } |
0a79b009 | 522 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 523 | |
16f8a6f9 NA |
524 | bool kvm_require_dr(struct kvm_vcpu *vcpu, int dr) |
525 | { | |
526 | if ((dr != 4 && dr != 5) || !kvm_read_cr4_bits(vcpu, X86_CR4_DE)) | |
527 | return true; | |
528 | ||
529 | kvm_queue_exception(vcpu, UD_VECTOR); | |
530 | return false; | |
531 | } | |
532 | EXPORT_SYMBOL_GPL(kvm_require_dr); | |
533 | ||
ec92fe44 JR |
534 | /* |
535 | * This function will be used to read from the physical memory of the currently | |
54bf36aa | 536 | * running guest. The difference to kvm_vcpu_read_guest_page is that this function |
ec92fe44 JR |
537 | * can read from guest physical or from the guest's guest physical memory. |
538 | */ | |
539 | int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, | |
540 | gfn_t ngfn, void *data, int offset, int len, | |
541 | u32 access) | |
542 | { | |
54987b7a | 543 | struct x86_exception exception; |
ec92fe44 JR |
544 | gfn_t real_gfn; |
545 | gpa_t ngpa; | |
546 | ||
547 | ngpa = gfn_to_gpa(ngfn); | |
54987b7a | 548 | real_gfn = mmu->translate_gpa(vcpu, ngpa, access, &exception); |
ec92fe44 JR |
549 | if (real_gfn == UNMAPPED_GVA) |
550 | return -EFAULT; | |
551 | ||
552 | real_gfn = gpa_to_gfn(real_gfn); | |
553 | ||
54bf36aa | 554 | return kvm_vcpu_read_guest_page(vcpu, real_gfn, data, offset, len); |
ec92fe44 JR |
555 | } |
556 | EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu); | |
557 | ||
69b0049a | 558 | static int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, |
3d06b8bf JR |
559 | void *data, int offset, int len, u32 access) |
560 | { | |
561 | return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn, | |
562 | data, offset, len, access); | |
563 | } | |
564 | ||
a03490ed CO |
565 | /* |
566 | * Load the pae pdptrs. Return true is they are all valid. | |
567 | */ | |
ff03a073 | 568 | int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3) |
a03490ed CO |
569 | { |
570 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
571 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
572 | int i; | |
573 | int ret; | |
ff03a073 | 574 | u64 pdpte[ARRAY_SIZE(mmu->pdptrs)]; |
a03490ed | 575 | |
ff03a073 JR |
576 | ret = kvm_read_guest_page_mmu(vcpu, mmu, pdpt_gfn, pdpte, |
577 | offset * sizeof(u64), sizeof(pdpte), | |
578 | PFERR_USER_MASK|PFERR_WRITE_MASK); | |
a03490ed CO |
579 | if (ret < 0) { |
580 | ret = 0; | |
581 | goto out; | |
582 | } | |
583 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
812f30b2 | 584 | if ((pdpte[i] & PT_PRESENT_MASK) && |
a0a64f50 XG |
585 | (pdpte[i] & |
586 | vcpu->arch.mmu.guest_rsvd_check.rsvd_bits_mask[0][2])) { | |
a03490ed CO |
587 | ret = 0; |
588 | goto out; | |
589 | } | |
590 | } | |
591 | ret = 1; | |
592 | ||
ff03a073 | 593 | memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs)); |
6de4f3ad AK |
594 | __set_bit(VCPU_EXREG_PDPTR, |
595 | (unsigned long *)&vcpu->arch.regs_avail); | |
596 | __set_bit(VCPU_EXREG_PDPTR, | |
597 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 598 | out: |
a03490ed CO |
599 | |
600 | return ret; | |
601 | } | |
cc4b6871 | 602 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 603 | |
9ed38ffa | 604 | bool pdptrs_changed(struct kvm_vcpu *vcpu) |
d835dfec | 605 | { |
ff03a073 | 606 | u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)]; |
d835dfec | 607 | bool changed = true; |
3d06b8bf JR |
608 | int offset; |
609 | gfn_t gfn; | |
d835dfec AK |
610 | int r; |
611 | ||
612 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
613 | return false; | |
614 | ||
6de4f3ad AK |
615 | if (!test_bit(VCPU_EXREG_PDPTR, |
616 | (unsigned long *)&vcpu->arch.regs_avail)) | |
617 | return true; | |
618 | ||
a512177e PB |
619 | gfn = (kvm_read_cr3(vcpu) & 0xffffffe0ul) >> PAGE_SHIFT; |
620 | offset = (kvm_read_cr3(vcpu) & 0xffffffe0ul) & (PAGE_SIZE - 1); | |
3d06b8bf JR |
621 | r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte), |
622 | PFERR_USER_MASK | PFERR_WRITE_MASK); | |
d835dfec AK |
623 | if (r < 0) |
624 | goto out; | |
ff03a073 | 625 | changed = memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 626 | out: |
d835dfec AK |
627 | |
628 | return changed; | |
629 | } | |
9ed38ffa | 630 | EXPORT_SYMBOL_GPL(pdptrs_changed); |
d835dfec | 631 | |
49a9b07e | 632 | int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed | 633 | { |
aad82703 | 634 | unsigned long old_cr0 = kvm_read_cr0(vcpu); |
d81135a5 | 635 | unsigned long update_bits = X86_CR0_PG | X86_CR0_WP; |
aad82703 | 636 | |
f9a48e6a AK |
637 | cr0 |= X86_CR0_ET; |
638 | ||
ab344828 | 639 | #ifdef CONFIG_X86_64 |
0f12244f GN |
640 | if (cr0 & 0xffffffff00000000UL) |
641 | return 1; | |
ab344828 GN |
642 | #endif |
643 | ||
644 | cr0 &= ~CR0_RESERVED_BITS; | |
a03490ed | 645 | |
0f12244f GN |
646 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) |
647 | return 1; | |
a03490ed | 648 | |
0f12244f GN |
649 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) |
650 | return 1; | |
a03490ed CO |
651 | |
652 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
653 | #ifdef CONFIG_X86_64 | |
f6801dff | 654 | if ((vcpu->arch.efer & EFER_LME)) { |
a03490ed CO |
655 | int cs_db, cs_l; |
656 | ||
0f12244f GN |
657 | if (!is_pae(vcpu)) |
658 | return 1; | |
a03490ed | 659 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
0f12244f GN |
660 | if (cs_l) |
661 | return 1; | |
a03490ed CO |
662 | } else |
663 | #endif | |
ff03a073 | 664 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
9f8fe504 | 665 | kvm_read_cr3(vcpu))) |
0f12244f | 666 | return 1; |
a03490ed CO |
667 | } |
668 | ||
ad756a16 MJ |
669 | if (!(cr0 & X86_CR0_PG) && kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE)) |
670 | return 1; | |
671 | ||
a03490ed | 672 | kvm_x86_ops->set_cr0(vcpu, cr0); |
a03490ed | 673 | |
d170c419 | 674 | if ((cr0 ^ old_cr0) & X86_CR0_PG) { |
e5f3f027 | 675 | kvm_clear_async_pf_completion_queue(vcpu); |
d170c419 LJ |
676 | kvm_async_pf_hash_reset(vcpu); |
677 | } | |
e5f3f027 | 678 | |
aad82703 SY |
679 | if ((cr0 ^ old_cr0) & update_bits) |
680 | kvm_mmu_reset_context(vcpu); | |
b18d5431 | 681 | |
879ae188 LE |
682 | if (((cr0 ^ old_cr0) & X86_CR0_CD) && |
683 | kvm_arch_has_noncoherent_dma(vcpu->kvm) && | |
684 | !kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED)) | |
b18d5431 XG |
685 | kvm_zap_gfn_range(vcpu->kvm, 0, ~0ULL); |
686 | ||
0f12244f GN |
687 | return 0; |
688 | } | |
2d3ad1f4 | 689 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 690 | |
2d3ad1f4 | 691 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 692 | { |
49a9b07e | 693 | (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f)); |
a03490ed | 694 | } |
2d3ad1f4 | 695 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 696 | |
42bdf991 MT |
697 | static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu) |
698 | { | |
699 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) && | |
700 | !vcpu->guest_xcr0_loaded) { | |
701 | /* kvm_set_xcr() also depends on this */ | |
702 | xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0); | |
703 | vcpu->guest_xcr0_loaded = 1; | |
704 | } | |
705 | } | |
706 | ||
707 | static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu) | |
708 | { | |
709 | if (vcpu->guest_xcr0_loaded) { | |
710 | if (vcpu->arch.xcr0 != host_xcr0) | |
711 | xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0); | |
712 | vcpu->guest_xcr0_loaded = 0; | |
713 | } | |
714 | } | |
715 | ||
69b0049a | 716 | static int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) |
2acf923e | 717 | { |
56c103ec LJ |
718 | u64 xcr0 = xcr; |
719 | u64 old_xcr0 = vcpu->arch.xcr0; | |
46c34cb0 | 720 | u64 valid_bits; |
2acf923e DC |
721 | |
722 | /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */ | |
723 | if (index != XCR_XFEATURE_ENABLED_MASK) | |
724 | return 1; | |
d91cab78 | 725 | if (!(xcr0 & XFEATURE_MASK_FP)) |
2acf923e | 726 | return 1; |
d91cab78 | 727 | if ((xcr0 & XFEATURE_MASK_YMM) && !(xcr0 & XFEATURE_MASK_SSE)) |
2acf923e | 728 | return 1; |
46c34cb0 PB |
729 | |
730 | /* | |
731 | * Do not allow the guest to set bits that we do not support | |
732 | * saving. However, xcr0 bit 0 is always set, even if the | |
733 | * emulated CPU does not support XSAVE (see fx_init). | |
734 | */ | |
d91cab78 | 735 | valid_bits = vcpu->arch.guest_supported_xcr0 | XFEATURE_MASK_FP; |
46c34cb0 | 736 | if (xcr0 & ~valid_bits) |
2acf923e | 737 | return 1; |
46c34cb0 | 738 | |
d91cab78 DH |
739 | if ((!(xcr0 & XFEATURE_MASK_BNDREGS)) != |
740 | (!(xcr0 & XFEATURE_MASK_BNDCSR))) | |
390bd528 LJ |
741 | return 1; |
742 | ||
d91cab78 DH |
743 | if (xcr0 & XFEATURE_MASK_AVX512) { |
744 | if (!(xcr0 & XFEATURE_MASK_YMM)) | |
612263b3 | 745 | return 1; |
d91cab78 | 746 | if ((xcr0 & XFEATURE_MASK_AVX512) != XFEATURE_MASK_AVX512) |
612263b3 CP |
747 | return 1; |
748 | } | |
2acf923e | 749 | vcpu->arch.xcr0 = xcr0; |
56c103ec | 750 | |
d91cab78 | 751 | if ((xcr0 ^ old_xcr0) & XFEATURE_MASK_EXTEND) |
56c103ec | 752 | kvm_update_cpuid(vcpu); |
2acf923e DC |
753 | return 0; |
754 | } | |
755 | ||
756 | int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) | |
757 | { | |
764bcbc5 Z |
758 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || |
759 | __kvm_set_xcr(vcpu, index, xcr)) { | |
2acf923e DC |
760 | kvm_inject_gp(vcpu, 0); |
761 | return 1; | |
762 | } | |
763 | return 0; | |
764 | } | |
765 | EXPORT_SYMBOL_GPL(kvm_set_xcr); | |
766 | ||
a83b29c6 | 767 | int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 768 | { |
fc78f519 | 769 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
0be0226f | 770 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE | |
b9baba86 | 771 | X86_CR4_SMEP | X86_CR4_SMAP | X86_CR4_PKE; |
0be0226f | 772 | |
0f12244f GN |
773 | if (cr4 & CR4_RESERVED_BITS) |
774 | return 1; | |
a03490ed | 775 | |
d6321d49 | 776 | if (!guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) && (cr4 & X86_CR4_OSXSAVE)) |
2acf923e DC |
777 | return 1; |
778 | ||
d6321d49 | 779 | if (!guest_cpuid_has(vcpu, X86_FEATURE_SMEP) && (cr4 & X86_CR4_SMEP)) |
2acf923e DC |
780 | return 1; |
781 | ||
d6321d49 | 782 | if (!guest_cpuid_has(vcpu, X86_FEATURE_SMAP) && (cr4 & X86_CR4_SMAP)) |
c68b734f YW |
783 | return 1; |
784 | ||
d6321d49 | 785 | if (!guest_cpuid_has(vcpu, X86_FEATURE_FSGSBASE) && (cr4 & X86_CR4_FSGSBASE)) |
97ec8c06 FW |
786 | return 1; |
787 | ||
d6321d49 | 788 | if (!guest_cpuid_has(vcpu, X86_FEATURE_PKU) && (cr4 & X86_CR4_PKE)) |
74dc2b4f YW |
789 | return 1; |
790 | ||
fd8cb433 | 791 | if (!guest_cpuid_has(vcpu, X86_FEATURE_LA57) && (cr4 & X86_CR4_LA57)) |
b9baba86 HH |
792 | return 1; |
793 | ||
a03490ed | 794 | if (is_long_mode(vcpu)) { |
0f12244f GN |
795 | if (!(cr4 & X86_CR4_PAE)) |
796 | return 1; | |
a2edf57f AK |
797 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
798 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
9f8fe504 AK |
799 | && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
800 | kvm_read_cr3(vcpu))) | |
0f12244f GN |
801 | return 1; |
802 | ||
ad756a16 | 803 | if ((cr4 & X86_CR4_PCIDE) && !(old_cr4 & X86_CR4_PCIDE)) { |
d6321d49 | 804 | if (!guest_cpuid_has(vcpu, X86_FEATURE_PCID)) |
ad756a16 MJ |
805 | return 1; |
806 | ||
807 | /* PCID can not be enabled when cr3[11:0]!=000H or EFER.LMA=0 */ | |
808 | if ((kvm_read_cr3(vcpu) & X86_CR3_PCID_MASK) || !is_long_mode(vcpu)) | |
809 | return 1; | |
810 | } | |
811 | ||
5e1746d6 | 812 | if (kvm_x86_ops->set_cr4(vcpu, cr4)) |
0f12244f | 813 | return 1; |
a03490ed | 814 | |
ad756a16 MJ |
815 | if (((cr4 ^ old_cr4) & pdptr_bits) || |
816 | (!(cr4 & X86_CR4_PCIDE) && (old_cr4 & X86_CR4_PCIDE))) | |
aad82703 | 817 | kvm_mmu_reset_context(vcpu); |
0f12244f | 818 | |
b9baba86 | 819 | if ((cr4 ^ old_cr4) & (X86_CR4_OSXSAVE | X86_CR4_PKE)) |
00b27a3e | 820 | kvm_update_cpuid(vcpu); |
2acf923e | 821 | |
0f12244f GN |
822 | return 0; |
823 | } | |
2d3ad1f4 | 824 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 825 | |
2390218b | 826 | int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 827 | { |
ac146235 | 828 | #ifdef CONFIG_X86_64 |
9d88fca7 | 829 | cr3 &= ~CR3_PCID_INVD; |
ac146235 | 830 | #endif |
9d88fca7 | 831 | |
9f8fe504 | 832 | if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) { |
0ba73cda | 833 | kvm_mmu_sync_roots(vcpu); |
77c3913b | 834 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
0f12244f | 835 | return 0; |
d835dfec AK |
836 | } |
837 | ||
d1cd3ce9 YZ |
838 | if (is_long_mode(vcpu) && |
839 | (cr3 & rsvd_bits(cpuid_maxphyaddr(vcpu), 62))) | |
840 | return 1; | |
841 | else if (is_pae(vcpu) && is_paging(vcpu) && | |
d9f89b88 | 842 | !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) |
346874c9 | 843 | return 1; |
a03490ed | 844 | |
0f12244f | 845 | vcpu->arch.cr3 = cr3; |
aff48baa | 846 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
d8d173da | 847 | kvm_mmu_new_cr3(vcpu); |
0f12244f GN |
848 | return 0; |
849 | } | |
2d3ad1f4 | 850 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 851 | |
eea1cff9 | 852 | int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed | 853 | { |
0f12244f GN |
854 | if (cr8 & CR8_RESERVED_BITS) |
855 | return 1; | |
35754c98 | 856 | if (lapic_in_kernel(vcpu)) |
a03490ed CO |
857 | kvm_lapic_set_tpr(vcpu, cr8); |
858 | else | |
ad312c7c | 859 | vcpu->arch.cr8 = cr8; |
0f12244f GN |
860 | return 0; |
861 | } | |
2d3ad1f4 | 862 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 863 | |
2d3ad1f4 | 864 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed | 865 | { |
35754c98 | 866 | if (lapic_in_kernel(vcpu)) |
a03490ed CO |
867 | return kvm_lapic_get_cr8(vcpu); |
868 | else | |
ad312c7c | 869 | return vcpu->arch.cr8; |
a03490ed | 870 | } |
2d3ad1f4 | 871 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 872 | |
ae561ede NA |
873 | static void kvm_update_dr0123(struct kvm_vcpu *vcpu) |
874 | { | |
875 | int i; | |
876 | ||
877 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) { | |
878 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
879 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
880 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_RELOAD; | |
881 | } | |
882 | } | |
883 | ||
73aaf249 JK |
884 | static void kvm_update_dr6(struct kvm_vcpu *vcpu) |
885 | { | |
886 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
887 | kvm_x86_ops->set_dr6(vcpu, vcpu->arch.dr6); | |
888 | } | |
889 | ||
c8639010 JK |
890 | static void kvm_update_dr7(struct kvm_vcpu *vcpu) |
891 | { | |
892 | unsigned long dr7; | |
893 | ||
894 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) | |
895 | dr7 = vcpu->arch.guest_debug_dr7; | |
896 | else | |
897 | dr7 = vcpu->arch.dr7; | |
898 | kvm_x86_ops->set_dr7(vcpu, dr7); | |
360b948d PB |
899 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_BP_ENABLED; |
900 | if (dr7 & DR7_BP_EN_MASK) | |
901 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_BP_ENABLED; | |
c8639010 JK |
902 | } |
903 | ||
6f43ed01 NA |
904 | static u64 kvm_dr6_fixed(struct kvm_vcpu *vcpu) |
905 | { | |
906 | u64 fixed = DR6_FIXED_1; | |
907 | ||
d6321d49 | 908 | if (!guest_cpuid_has(vcpu, X86_FEATURE_RTM)) |
6f43ed01 NA |
909 | fixed |= DR6_RTM; |
910 | return fixed; | |
911 | } | |
912 | ||
338dbc97 | 913 | static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
020df079 GN |
914 | { |
915 | switch (dr) { | |
916 | case 0 ... 3: | |
917 | vcpu->arch.db[dr] = val; | |
918 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
919 | vcpu->arch.eff_db[dr] = val; | |
920 | break; | |
921 | case 4: | |
020df079 GN |
922 | /* fall through */ |
923 | case 6: | |
338dbc97 GN |
924 | if (val & 0xffffffff00000000ULL) |
925 | return -1; /* #GP */ | |
6f43ed01 | 926 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | kvm_dr6_fixed(vcpu); |
73aaf249 | 927 | kvm_update_dr6(vcpu); |
020df079 GN |
928 | break; |
929 | case 5: | |
020df079 GN |
930 | /* fall through */ |
931 | default: /* 7 */ | |
338dbc97 GN |
932 | if (val & 0xffffffff00000000ULL) |
933 | return -1; /* #GP */ | |
020df079 | 934 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; |
c8639010 | 935 | kvm_update_dr7(vcpu); |
020df079 GN |
936 | break; |
937 | } | |
938 | ||
939 | return 0; | |
940 | } | |
338dbc97 GN |
941 | |
942 | int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) | |
943 | { | |
16f8a6f9 | 944 | if (__kvm_set_dr(vcpu, dr, val)) { |
338dbc97 | 945 | kvm_inject_gp(vcpu, 0); |
16f8a6f9 NA |
946 | return 1; |
947 | } | |
948 | return 0; | |
338dbc97 | 949 | } |
020df079 GN |
950 | EXPORT_SYMBOL_GPL(kvm_set_dr); |
951 | ||
16f8a6f9 | 952 | int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) |
020df079 GN |
953 | { |
954 | switch (dr) { | |
955 | case 0 ... 3: | |
956 | *val = vcpu->arch.db[dr]; | |
957 | break; | |
958 | case 4: | |
020df079 GN |
959 | /* fall through */ |
960 | case 6: | |
73aaf249 JK |
961 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
962 | *val = vcpu->arch.dr6; | |
963 | else | |
964 | *val = kvm_x86_ops->get_dr6(vcpu); | |
020df079 GN |
965 | break; |
966 | case 5: | |
020df079 GN |
967 | /* fall through */ |
968 | default: /* 7 */ | |
969 | *val = vcpu->arch.dr7; | |
970 | break; | |
971 | } | |
338dbc97 GN |
972 | return 0; |
973 | } | |
020df079 GN |
974 | EXPORT_SYMBOL_GPL(kvm_get_dr); |
975 | ||
022cd0e8 AK |
976 | bool kvm_rdpmc(struct kvm_vcpu *vcpu) |
977 | { | |
978 | u32 ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
979 | u64 data; | |
980 | int err; | |
981 | ||
c6702c9d | 982 | err = kvm_pmu_rdpmc(vcpu, ecx, &data); |
022cd0e8 AK |
983 | if (err) |
984 | return err; | |
985 | kvm_register_write(vcpu, VCPU_REGS_RAX, (u32)data); | |
986 | kvm_register_write(vcpu, VCPU_REGS_RDX, data >> 32); | |
987 | return err; | |
988 | } | |
989 | EXPORT_SYMBOL_GPL(kvm_rdpmc); | |
990 | ||
043405e1 CO |
991 | /* |
992 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
993 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
994 | * | |
995 | * This list is modified at module load time to reflect the | |
e3267cbb | 996 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
62ef68bb PB |
997 | * kvm-specific. Those are put in emulated_msrs; filtering of emulated_msrs |
998 | * may depend on host virtualization features rather than host cpu features. | |
043405e1 | 999 | */ |
e3267cbb | 1000 | |
043405e1 CO |
1001 | static u32 msrs_to_save[] = { |
1002 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
8c06585d | 1003 | MSR_STAR, |
043405e1 CO |
1004 | #ifdef CONFIG_X86_64 |
1005 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
1006 | #endif | |
b3897a49 | 1007 | MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA, |
9dbe6cf9 | 1008 | MSR_IA32_FEATURE_CONTROL, MSR_IA32_BNDCFGS, MSR_TSC_AUX, |
043405e1 CO |
1009 | }; |
1010 | ||
1011 | static unsigned num_msrs_to_save; | |
1012 | ||
62ef68bb PB |
1013 | static u32 emulated_msrs[] = { |
1014 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, | |
1015 | MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW, | |
1016 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, | |
1017 | HV_X64_MSR_TIME_REF_COUNT, HV_X64_MSR_REFERENCE_TSC, | |
72c139ba | 1018 | HV_X64_MSR_TSC_FREQUENCY, HV_X64_MSR_APIC_FREQUENCY, |
e7d9513b AS |
1019 | HV_X64_MSR_CRASH_P0, HV_X64_MSR_CRASH_P1, HV_X64_MSR_CRASH_P2, |
1020 | HV_X64_MSR_CRASH_P3, HV_X64_MSR_CRASH_P4, HV_X64_MSR_CRASH_CTL, | |
e516cebb | 1021 | HV_X64_MSR_RESET, |
11c4b1ca | 1022 | HV_X64_MSR_VP_INDEX, |
9eec50b8 | 1023 | HV_X64_MSR_VP_RUNTIME, |
5c919412 | 1024 | HV_X64_MSR_SCONTROL, |
1f4b34f8 | 1025 | HV_X64_MSR_STIMER0_CONFIG, |
62ef68bb PB |
1026 | HV_X64_MSR_APIC_ASSIST_PAGE, MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME, |
1027 | MSR_KVM_PV_EOI_EN, | |
1028 | ||
ba904635 | 1029 | MSR_IA32_TSC_ADJUST, |
a3e06bbe | 1030 | MSR_IA32_TSCDEADLINE, |
043405e1 | 1031 | MSR_IA32_MISC_ENABLE, |
908e75f3 AK |
1032 | MSR_IA32_MCG_STATUS, |
1033 | MSR_IA32_MCG_CTL, | |
c45dcc71 | 1034 | MSR_IA32_MCG_EXT_CTL, |
64d60670 | 1035 | MSR_IA32_SMBASE, |
db2336a8 KH |
1036 | MSR_PLATFORM_INFO, |
1037 | MSR_MISC_FEATURES_ENABLES, | |
043405e1 CO |
1038 | }; |
1039 | ||
62ef68bb PB |
1040 | static unsigned num_emulated_msrs; |
1041 | ||
384bb783 | 1042 | bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer) |
15c4a640 | 1043 | { |
b69e8cae | 1044 | if (efer & efer_reserved_bits) |
384bb783 | 1045 | return false; |
15c4a640 | 1046 | |
1b4d56b8 | 1047 | if (efer & EFER_FFXSR && !guest_cpuid_has(vcpu, X86_FEATURE_FXSR_OPT)) |
384bb783 | 1048 | return false; |
1b2fd70c | 1049 | |
1b4d56b8 | 1050 | if (efer & EFER_SVME && !guest_cpuid_has(vcpu, X86_FEATURE_SVM)) |
384bb783 | 1051 | return false; |
d8017474 | 1052 | |
384bb783 JK |
1053 | return true; |
1054 | } | |
1055 | EXPORT_SYMBOL_GPL(kvm_valid_efer); | |
1056 | ||
1057 | static int set_efer(struct kvm_vcpu *vcpu, u64 efer) | |
1058 | { | |
1059 | u64 old_efer = vcpu->arch.efer; | |
1060 | ||
1061 | if (!kvm_valid_efer(vcpu, efer)) | |
1062 | return 1; | |
1063 | ||
1064 | if (is_paging(vcpu) | |
1065 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) | |
1066 | return 1; | |
1067 | ||
15c4a640 | 1068 | efer &= ~EFER_LMA; |
f6801dff | 1069 | efer |= vcpu->arch.efer & EFER_LMA; |
15c4a640 | 1070 | |
a3d204e2 SY |
1071 | kvm_x86_ops->set_efer(vcpu, efer); |
1072 | ||
aad82703 SY |
1073 | /* Update reserved bits */ |
1074 | if ((efer ^ old_efer) & EFER_NX) | |
1075 | kvm_mmu_reset_context(vcpu); | |
1076 | ||
b69e8cae | 1077 | return 0; |
15c4a640 CO |
1078 | } |
1079 | ||
f2b4b7dd JR |
1080 | void kvm_enable_efer_bits(u64 mask) |
1081 | { | |
1082 | efer_reserved_bits &= ~mask; | |
1083 | } | |
1084 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
1085 | ||
15c4a640 CO |
1086 | /* |
1087 | * Writes msr value into into the appropriate "register". | |
1088 | * Returns 0 on success, non-0 otherwise. | |
1089 | * Assumes vcpu_load() was already called. | |
1090 | */ | |
8fe8ab46 | 1091 | int kvm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
15c4a640 | 1092 | { |
854e8bb1 NA |
1093 | switch (msr->index) { |
1094 | case MSR_FS_BASE: | |
1095 | case MSR_GS_BASE: | |
1096 | case MSR_KERNEL_GS_BASE: | |
1097 | case MSR_CSTAR: | |
1098 | case MSR_LSTAR: | |
fd8cb433 | 1099 | if (is_noncanonical_address(msr->data, vcpu)) |
854e8bb1 NA |
1100 | return 1; |
1101 | break; | |
1102 | case MSR_IA32_SYSENTER_EIP: | |
1103 | case MSR_IA32_SYSENTER_ESP: | |
1104 | /* | |
1105 | * IA32_SYSENTER_ESP and IA32_SYSENTER_EIP cause #GP if | |
1106 | * non-canonical address is written on Intel but not on | |
1107 | * AMD (which ignores the top 32-bits, because it does | |
1108 | * not implement 64-bit SYSENTER). | |
1109 | * | |
1110 | * 64-bit code should hence be able to write a non-canonical | |
1111 | * value on AMD. Making the address canonical ensures that | |
1112 | * vmentry does not fail on Intel after writing a non-canonical | |
1113 | * value, and that something deterministic happens if the guest | |
1114 | * invokes 64-bit SYSENTER. | |
1115 | */ | |
fd8cb433 | 1116 | msr->data = get_canonical(msr->data, vcpu_virt_addr_bits(vcpu)); |
854e8bb1 | 1117 | } |
8fe8ab46 | 1118 | return kvm_x86_ops->set_msr(vcpu, msr); |
15c4a640 | 1119 | } |
854e8bb1 | 1120 | EXPORT_SYMBOL_GPL(kvm_set_msr); |
15c4a640 | 1121 | |
313a3dc7 CO |
1122 | /* |
1123 | * Adapt set_msr() to msr_io()'s calling convention | |
1124 | */ | |
609e36d3 PB |
1125 | static int do_get_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1126 | { | |
1127 | struct msr_data msr; | |
1128 | int r; | |
1129 | ||
1130 | msr.index = index; | |
1131 | msr.host_initiated = true; | |
1132 | r = kvm_get_msr(vcpu, &msr); | |
1133 | if (r) | |
1134 | return r; | |
1135 | ||
1136 | *data = msr.data; | |
1137 | return 0; | |
1138 | } | |
1139 | ||
313a3dc7 CO |
1140 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1141 | { | |
8fe8ab46 WA |
1142 | struct msr_data msr; |
1143 | ||
1144 | msr.data = *data; | |
1145 | msr.index = index; | |
1146 | msr.host_initiated = true; | |
1147 | return kvm_set_msr(vcpu, &msr); | |
313a3dc7 CO |
1148 | } |
1149 | ||
16e8d74d MT |
1150 | #ifdef CONFIG_X86_64 |
1151 | struct pvclock_gtod_data { | |
1152 | seqcount_t seq; | |
1153 | ||
1154 | struct { /* extract of a clocksource struct */ | |
1155 | int vclock_mode; | |
a5a1d1c2 TG |
1156 | u64 cycle_last; |
1157 | u64 mask; | |
16e8d74d MT |
1158 | u32 mult; |
1159 | u32 shift; | |
1160 | } clock; | |
1161 | ||
cbcf2dd3 TG |
1162 | u64 boot_ns; |
1163 | u64 nsec_base; | |
55dd00a7 | 1164 | u64 wall_time_sec; |
16e8d74d MT |
1165 | }; |
1166 | ||
1167 | static struct pvclock_gtod_data pvclock_gtod_data; | |
1168 | ||
1169 | static void update_pvclock_gtod(struct timekeeper *tk) | |
1170 | { | |
1171 | struct pvclock_gtod_data *vdata = &pvclock_gtod_data; | |
cbcf2dd3 TG |
1172 | u64 boot_ns; |
1173 | ||
876e7881 | 1174 | boot_ns = ktime_to_ns(ktime_add(tk->tkr_mono.base, tk->offs_boot)); |
16e8d74d MT |
1175 | |
1176 | write_seqcount_begin(&vdata->seq); | |
1177 | ||
1178 | /* copy pvclock gtod data */ | |
876e7881 PZ |
1179 | vdata->clock.vclock_mode = tk->tkr_mono.clock->archdata.vclock_mode; |
1180 | vdata->clock.cycle_last = tk->tkr_mono.cycle_last; | |
1181 | vdata->clock.mask = tk->tkr_mono.mask; | |
1182 | vdata->clock.mult = tk->tkr_mono.mult; | |
1183 | vdata->clock.shift = tk->tkr_mono.shift; | |
16e8d74d | 1184 | |
cbcf2dd3 | 1185 | vdata->boot_ns = boot_ns; |
876e7881 | 1186 | vdata->nsec_base = tk->tkr_mono.xtime_nsec; |
16e8d74d | 1187 | |
55dd00a7 MT |
1188 | vdata->wall_time_sec = tk->xtime_sec; |
1189 | ||
16e8d74d MT |
1190 | write_seqcount_end(&vdata->seq); |
1191 | } | |
1192 | #endif | |
1193 | ||
bab5bb39 NK |
1194 | void kvm_set_pending_timer(struct kvm_vcpu *vcpu) |
1195 | { | |
1196 | /* | |
1197 | * Note: KVM_REQ_PENDING_TIMER is implicitly checked in | |
1198 | * vcpu_enter_guest. This function is only called from | |
1199 | * the physical CPU that is running vcpu. | |
1200 | */ | |
1201 | kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); | |
1202 | } | |
16e8d74d | 1203 | |
18068523 GOC |
1204 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
1205 | { | |
9ed3c444 AK |
1206 | int version; |
1207 | int r; | |
50d0a0f9 | 1208 | struct pvclock_wall_clock wc; |
87aeb54f | 1209 | struct timespec64 boot; |
18068523 GOC |
1210 | |
1211 | if (!wall_clock) | |
1212 | return; | |
1213 | ||
9ed3c444 AK |
1214 | r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version)); |
1215 | if (r) | |
1216 | return; | |
1217 | ||
1218 | if (version & 1) | |
1219 | ++version; /* first time write, random junk */ | |
1220 | ||
1221 | ++version; | |
18068523 | 1222 | |
1dab1345 NK |
1223 | if (kvm_write_guest(kvm, wall_clock, &version, sizeof(version))) |
1224 | return; | |
18068523 | 1225 | |
50d0a0f9 GH |
1226 | /* |
1227 | * The guest calculates current wall clock time by adding | |
34c238a1 | 1228 | * system time (updated by kvm_guest_time_update below) to the |
50d0a0f9 GH |
1229 | * wall clock specified here. guest system time equals host |
1230 | * system time for us, thus we must fill in host boot time here. | |
1231 | */ | |
87aeb54f | 1232 | getboottime64(&boot); |
50d0a0f9 | 1233 | |
4b648665 | 1234 | if (kvm->arch.kvmclock_offset) { |
87aeb54f AB |
1235 | struct timespec64 ts = ns_to_timespec64(kvm->arch.kvmclock_offset); |
1236 | boot = timespec64_sub(boot, ts); | |
4b648665 | 1237 | } |
87aeb54f | 1238 | wc.sec = (u32)boot.tv_sec; /* overflow in 2106 guest time */ |
50d0a0f9 GH |
1239 | wc.nsec = boot.tv_nsec; |
1240 | wc.version = version; | |
18068523 GOC |
1241 | |
1242 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
1243 | ||
1244 | version++; | |
1245 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
1246 | } |
1247 | ||
50d0a0f9 GH |
1248 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
1249 | { | |
b51012de PB |
1250 | do_shl32_div32(dividend, divisor); |
1251 | return dividend; | |
50d0a0f9 GH |
1252 | } |
1253 | ||
3ae13faa | 1254 | static void kvm_get_time_scale(uint64_t scaled_hz, uint64_t base_hz, |
5f4e3f88 | 1255 | s8 *pshift, u32 *pmultiplier) |
50d0a0f9 | 1256 | { |
5f4e3f88 | 1257 | uint64_t scaled64; |
50d0a0f9 GH |
1258 | int32_t shift = 0; |
1259 | uint64_t tps64; | |
1260 | uint32_t tps32; | |
1261 | ||
3ae13faa PB |
1262 | tps64 = base_hz; |
1263 | scaled64 = scaled_hz; | |
50933623 | 1264 | while (tps64 > scaled64*2 || tps64 & 0xffffffff00000000ULL) { |
50d0a0f9 GH |
1265 | tps64 >>= 1; |
1266 | shift--; | |
1267 | } | |
1268 | ||
1269 | tps32 = (uint32_t)tps64; | |
50933623 JK |
1270 | while (tps32 <= scaled64 || scaled64 & 0xffffffff00000000ULL) { |
1271 | if (scaled64 & 0xffffffff00000000ULL || tps32 & 0x80000000) | |
5f4e3f88 ZA |
1272 | scaled64 >>= 1; |
1273 | else | |
1274 | tps32 <<= 1; | |
50d0a0f9 GH |
1275 | shift++; |
1276 | } | |
1277 | ||
5f4e3f88 ZA |
1278 | *pshift = shift; |
1279 | *pmultiplier = div_frac(scaled64, tps32); | |
50d0a0f9 | 1280 | |
3ae13faa PB |
1281 | pr_debug("%s: base_hz %llu => %llu, shift %d, mul %u\n", |
1282 | __func__, base_hz, scaled_hz, shift, *pmultiplier); | |
50d0a0f9 GH |
1283 | } |
1284 | ||
d828199e | 1285 | #ifdef CONFIG_X86_64 |
16e8d74d | 1286 | static atomic_t kvm_guest_has_master_clock = ATOMIC_INIT(0); |
d828199e | 1287 | #endif |
16e8d74d | 1288 | |
c8076604 | 1289 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
69b0049a | 1290 | static unsigned long max_tsc_khz; |
c8076604 | 1291 | |
cc578287 | 1292 | static u32 adjust_tsc_khz(u32 khz, s32 ppm) |
1e993611 | 1293 | { |
cc578287 ZA |
1294 | u64 v = (u64)khz * (1000000 + ppm); |
1295 | do_div(v, 1000000); | |
1296 | return v; | |
1e993611 JR |
1297 | } |
1298 | ||
381d585c HZ |
1299 | static int set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale) |
1300 | { | |
1301 | u64 ratio; | |
1302 | ||
1303 | /* Guest TSC same frequency as host TSC? */ | |
1304 | if (!scale) { | |
1305 | vcpu->arch.tsc_scaling_ratio = kvm_default_tsc_scaling_ratio; | |
1306 | return 0; | |
1307 | } | |
1308 | ||
1309 | /* TSC scaling supported? */ | |
1310 | if (!kvm_has_tsc_control) { | |
1311 | if (user_tsc_khz > tsc_khz) { | |
1312 | vcpu->arch.tsc_catchup = 1; | |
1313 | vcpu->arch.tsc_always_catchup = 1; | |
1314 | return 0; | |
1315 | } else { | |
1316 | WARN(1, "user requested TSC rate below hardware speed\n"); | |
1317 | return -1; | |
1318 | } | |
1319 | } | |
1320 | ||
1321 | /* TSC scaling required - calculate ratio */ | |
1322 | ratio = mul_u64_u32_div(1ULL << kvm_tsc_scaling_ratio_frac_bits, | |
1323 | user_tsc_khz, tsc_khz); | |
1324 | ||
1325 | if (ratio == 0 || ratio >= kvm_max_tsc_scaling_ratio) { | |
1326 | WARN_ONCE(1, "Invalid TSC scaling ratio - virtual-tsc-khz=%u\n", | |
1327 | user_tsc_khz); | |
1328 | return -1; | |
1329 | } | |
1330 | ||
1331 | vcpu->arch.tsc_scaling_ratio = ratio; | |
1332 | return 0; | |
1333 | } | |
1334 | ||
4941b8cb | 1335 | static int kvm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz) |
759379dd | 1336 | { |
cc578287 ZA |
1337 | u32 thresh_lo, thresh_hi; |
1338 | int use_scaling = 0; | |
217fc9cf | 1339 | |
03ba32ca | 1340 | /* tsc_khz can be zero if TSC calibration fails */ |
4941b8cb | 1341 | if (user_tsc_khz == 0) { |
ad721883 HZ |
1342 | /* set tsc_scaling_ratio to a safe value */ |
1343 | vcpu->arch.tsc_scaling_ratio = kvm_default_tsc_scaling_ratio; | |
381d585c | 1344 | return -1; |
ad721883 | 1345 | } |
03ba32ca | 1346 | |
c285545f | 1347 | /* Compute a scale to convert nanoseconds in TSC cycles */ |
3ae13faa | 1348 | kvm_get_time_scale(user_tsc_khz * 1000LL, NSEC_PER_SEC, |
cc578287 ZA |
1349 | &vcpu->arch.virtual_tsc_shift, |
1350 | &vcpu->arch.virtual_tsc_mult); | |
4941b8cb | 1351 | vcpu->arch.virtual_tsc_khz = user_tsc_khz; |
cc578287 ZA |
1352 | |
1353 | /* | |
1354 | * Compute the variation in TSC rate which is acceptable | |
1355 | * within the range of tolerance and decide if the | |
1356 | * rate being applied is within that bounds of the hardware | |
1357 | * rate. If so, no scaling or compensation need be done. | |
1358 | */ | |
1359 | thresh_lo = adjust_tsc_khz(tsc_khz, -tsc_tolerance_ppm); | |
1360 | thresh_hi = adjust_tsc_khz(tsc_khz, tsc_tolerance_ppm); | |
4941b8cb PB |
1361 | if (user_tsc_khz < thresh_lo || user_tsc_khz > thresh_hi) { |
1362 | pr_debug("kvm: requested TSC rate %u falls outside tolerance [%u,%u]\n", user_tsc_khz, thresh_lo, thresh_hi); | |
cc578287 ZA |
1363 | use_scaling = 1; |
1364 | } | |
4941b8cb | 1365 | return set_tsc_khz(vcpu, user_tsc_khz, use_scaling); |
c285545f ZA |
1366 | } |
1367 | ||
1368 | static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns) | |
1369 | { | |
e26101b1 | 1370 | u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.this_tsc_nsec, |
cc578287 ZA |
1371 | vcpu->arch.virtual_tsc_mult, |
1372 | vcpu->arch.virtual_tsc_shift); | |
e26101b1 | 1373 | tsc += vcpu->arch.this_tsc_write; |
c285545f ZA |
1374 | return tsc; |
1375 | } | |
1376 | ||
69b0049a | 1377 | static void kvm_track_tsc_matching(struct kvm_vcpu *vcpu) |
b48aa97e MT |
1378 | { |
1379 | #ifdef CONFIG_X86_64 | |
1380 | bool vcpus_matched; | |
b48aa97e MT |
1381 | struct kvm_arch *ka = &vcpu->kvm->arch; |
1382 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1383 | ||
1384 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1385 | atomic_read(&vcpu->kvm->online_vcpus)); | |
1386 | ||
7f187922 MT |
1387 | /* |
1388 | * Once the masterclock is enabled, always perform request in | |
1389 | * order to update it. | |
1390 | * | |
1391 | * In order to enable masterclock, the host clocksource must be TSC | |
1392 | * and the vcpus need to have matched TSCs. When that happens, | |
1393 | * perform request to enable masterclock. | |
1394 | */ | |
1395 | if (ka->use_master_clock || | |
1396 | (gtod->clock.vclock_mode == VCLOCK_TSC && vcpus_matched)) | |
b48aa97e MT |
1397 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
1398 | ||
1399 | trace_kvm_track_tsc(vcpu->vcpu_id, ka->nr_vcpus_matched_tsc, | |
1400 | atomic_read(&vcpu->kvm->online_vcpus), | |
1401 | ka->use_master_clock, gtod->clock.vclock_mode); | |
1402 | #endif | |
1403 | } | |
1404 | ||
ba904635 WA |
1405 | static void update_ia32_tsc_adjust_msr(struct kvm_vcpu *vcpu, s64 offset) |
1406 | { | |
3e3f5026 | 1407 | u64 curr_offset = vcpu->arch.tsc_offset; |
ba904635 WA |
1408 | vcpu->arch.ia32_tsc_adjust_msr += offset - curr_offset; |
1409 | } | |
1410 | ||
35181e86 HZ |
1411 | /* |
1412 | * Multiply tsc by a fixed point number represented by ratio. | |
1413 | * | |
1414 | * The most significant 64-N bits (mult) of ratio represent the | |
1415 | * integral part of the fixed point number; the remaining N bits | |
1416 | * (frac) represent the fractional part, ie. ratio represents a fixed | |
1417 | * point number (mult + frac * 2^(-N)). | |
1418 | * | |
1419 | * N equals to kvm_tsc_scaling_ratio_frac_bits. | |
1420 | */ | |
1421 | static inline u64 __scale_tsc(u64 ratio, u64 tsc) | |
1422 | { | |
1423 | return mul_u64_u64_shr(tsc, ratio, kvm_tsc_scaling_ratio_frac_bits); | |
1424 | } | |
1425 | ||
1426 | u64 kvm_scale_tsc(struct kvm_vcpu *vcpu, u64 tsc) | |
1427 | { | |
1428 | u64 _tsc = tsc; | |
1429 | u64 ratio = vcpu->arch.tsc_scaling_ratio; | |
1430 | ||
1431 | if (ratio != kvm_default_tsc_scaling_ratio) | |
1432 | _tsc = __scale_tsc(ratio, tsc); | |
1433 | ||
1434 | return _tsc; | |
1435 | } | |
1436 | EXPORT_SYMBOL_GPL(kvm_scale_tsc); | |
1437 | ||
07c1419a HZ |
1438 | static u64 kvm_compute_tsc_offset(struct kvm_vcpu *vcpu, u64 target_tsc) |
1439 | { | |
1440 | u64 tsc; | |
1441 | ||
1442 | tsc = kvm_scale_tsc(vcpu, rdtsc()); | |
1443 | ||
1444 | return target_tsc - tsc; | |
1445 | } | |
1446 | ||
4ba76538 HZ |
1447 | u64 kvm_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc) |
1448 | { | |
ea26e4ec | 1449 | return vcpu->arch.tsc_offset + kvm_scale_tsc(vcpu, host_tsc); |
4ba76538 HZ |
1450 | } |
1451 | EXPORT_SYMBOL_GPL(kvm_read_l1_tsc); | |
1452 | ||
a545ab6a LC |
1453 | static void kvm_vcpu_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) |
1454 | { | |
1455 | kvm_x86_ops->write_tsc_offset(vcpu, offset); | |
1456 | vcpu->arch.tsc_offset = offset; | |
1457 | } | |
1458 | ||
8fe8ab46 | 1459 | void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr) |
99e3e30a ZA |
1460 | { |
1461 | struct kvm *kvm = vcpu->kvm; | |
f38e098f | 1462 | u64 offset, ns, elapsed; |
99e3e30a | 1463 | unsigned long flags; |
b48aa97e | 1464 | bool matched; |
0d3da0d2 | 1465 | bool already_matched; |
8fe8ab46 | 1466 | u64 data = msr->data; |
c5e8ec8e | 1467 | bool synchronizing = false; |
99e3e30a | 1468 | |
038f8c11 | 1469 | raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags); |
07c1419a | 1470 | offset = kvm_compute_tsc_offset(vcpu, data); |
108b249c | 1471 | ns = ktime_get_boot_ns(); |
f38e098f | 1472 | elapsed = ns - kvm->arch.last_tsc_nsec; |
5d3cb0f6 | 1473 | |
03ba32ca | 1474 | if (vcpu->arch.virtual_tsc_khz) { |
bd8fab39 DP |
1475 | if (data == 0 && msr->host_initiated) { |
1476 | /* | |
1477 | * detection of vcpu initialization -- need to sync | |
1478 | * with other vCPUs. This particularly helps to keep | |
1479 | * kvm_clock stable after CPU hotplug | |
1480 | */ | |
1481 | synchronizing = true; | |
1482 | } else { | |
1483 | u64 tsc_exp = kvm->arch.last_tsc_write + | |
1484 | nsec_to_cycles(vcpu, elapsed); | |
1485 | u64 tsc_hz = vcpu->arch.virtual_tsc_khz * 1000LL; | |
1486 | /* | |
1487 | * Special case: TSC write with a small delta (1 second) | |
1488 | * of virtual cycle time against real time is | |
1489 | * interpreted as an attempt to synchronize the CPU. | |
1490 | */ | |
1491 | synchronizing = data < tsc_exp + tsc_hz && | |
1492 | data + tsc_hz > tsc_exp; | |
1493 | } | |
c5e8ec8e | 1494 | } |
f38e098f ZA |
1495 | |
1496 | /* | |
5d3cb0f6 ZA |
1497 | * For a reliable TSC, we can match TSC offsets, and for an unstable |
1498 | * TSC, we add elapsed time in this computation. We could let the | |
1499 | * compensation code attempt to catch up if we fall behind, but | |
1500 | * it's better to try to match offsets from the beginning. | |
1501 | */ | |
c5e8ec8e | 1502 | if (synchronizing && |
5d3cb0f6 | 1503 | vcpu->arch.virtual_tsc_khz == kvm->arch.last_tsc_khz) { |
f38e098f | 1504 | if (!check_tsc_unstable()) { |
e26101b1 | 1505 | offset = kvm->arch.cur_tsc_offset; |
f38e098f ZA |
1506 | pr_debug("kvm: matched tsc offset for %llu\n", data); |
1507 | } else { | |
857e4099 | 1508 | u64 delta = nsec_to_cycles(vcpu, elapsed); |
5d3cb0f6 | 1509 | data += delta; |
07c1419a | 1510 | offset = kvm_compute_tsc_offset(vcpu, data); |
759379dd | 1511 | pr_debug("kvm: adjusted tsc offset by %llu\n", delta); |
f38e098f | 1512 | } |
b48aa97e | 1513 | matched = true; |
0d3da0d2 | 1514 | already_matched = (vcpu->arch.this_tsc_generation == kvm->arch.cur_tsc_generation); |
e26101b1 ZA |
1515 | } else { |
1516 | /* | |
1517 | * We split periods of matched TSC writes into generations. | |
1518 | * For each generation, we track the original measured | |
1519 | * nanosecond time, offset, and write, so if TSCs are in | |
1520 | * sync, we can match exact offset, and if not, we can match | |
4a969980 | 1521 | * exact software computation in compute_guest_tsc() |
e26101b1 ZA |
1522 | * |
1523 | * These values are tracked in kvm->arch.cur_xxx variables. | |
1524 | */ | |
1525 | kvm->arch.cur_tsc_generation++; | |
1526 | kvm->arch.cur_tsc_nsec = ns; | |
1527 | kvm->arch.cur_tsc_write = data; | |
1528 | kvm->arch.cur_tsc_offset = offset; | |
b48aa97e | 1529 | matched = false; |
0d3da0d2 | 1530 | pr_debug("kvm: new tsc generation %llu, clock %llu\n", |
e26101b1 | 1531 | kvm->arch.cur_tsc_generation, data); |
f38e098f | 1532 | } |
e26101b1 ZA |
1533 | |
1534 | /* | |
1535 | * We also track th most recent recorded KHZ, write and time to | |
1536 | * allow the matching interval to be extended at each write. | |
1537 | */ | |
f38e098f ZA |
1538 | kvm->arch.last_tsc_nsec = ns; |
1539 | kvm->arch.last_tsc_write = data; | |
5d3cb0f6 | 1540 | kvm->arch.last_tsc_khz = vcpu->arch.virtual_tsc_khz; |
99e3e30a | 1541 | |
b183aa58 | 1542 | vcpu->arch.last_guest_tsc = data; |
e26101b1 ZA |
1543 | |
1544 | /* Keep track of which generation this VCPU has synchronized to */ | |
1545 | vcpu->arch.this_tsc_generation = kvm->arch.cur_tsc_generation; | |
1546 | vcpu->arch.this_tsc_nsec = kvm->arch.cur_tsc_nsec; | |
1547 | vcpu->arch.this_tsc_write = kvm->arch.cur_tsc_write; | |
1548 | ||
d6321d49 | 1549 | if (!msr->host_initiated && guest_cpuid_has(vcpu, X86_FEATURE_TSC_ADJUST)) |
ba904635 | 1550 | update_ia32_tsc_adjust_msr(vcpu, offset); |
d6321d49 | 1551 | |
a545ab6a | 1552 | kvm_vcpu_write_tsc_offset(vcpu, offset); |
e26101b1 | 1553 | raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags); |
b48aa97e MT |
1554 | |
1555 | spin_lock(&kvm->arch.pvclock_gtod_sync_lock); | |
0d3da0d2 | 1556 | if (!matched) { |
b48aa97e | 1557 | kvm->arch.nr_vcpus_matched_tsc = 0; |
0d3da0d2 TG |
1558 | } else if (!already_matched) { |
1559 | kvm->arch.nr_vcpus_matched_tsc++; | |
1560 | } | |
b48aa97e MT |
1561 | |
1562 | kvm_track_tsc_matching(vcpu); | |
1563 | spin_unlock(&kvm->arch.pvclock_gtod_sync_lock); | |
99e3e30a | 1564 | } |
e26101b1 | 1565 | |
99e3e30a ZA |
1566 | EXPORT_SYMBOL_GPL(kvm_write_tsc); |
1567 | ||
58ea6767 HZ |
1568 | static inline void adjust_tsc_offset_guest(struct kvm_vcpu *vcpu, |
1569 | s64 adjustment) | |
1570 | { | |
ea26e4ec | 1571 | kvm_vcpu_write_tsc_offset(vcpu, vcpu->arch.tsc_offset + adjustment); |
58ea6767 HZ |
1572 | } |
1573 | ||
1574 | static inline void adjust_tsc_offset_host(struct kvm_vcpu *vcpu, s64 adjustment) | |
1575 | { | |
1576 | if (vcpu->arch.tsc_scaling_ratio != kvm_default_tsc_scaling_ratio) | |
1577 | WARN_ON(adjustment < 0); | |
1578 | adjustment = kvm_scale_tsc(vcpu, (u64) adjustment); | |
ea26e4ec | 1579 | adjust_tsc_offset_guest(vcpu, adjustment); |
58ea6767 HZ |
1580 | } |
1581 | ||
d828199e MT |
1582 | #ifdef CONFIG_X86_64 |
1583 | ||
a5a1d1c2 | 1584 | static u64 read_tsc(void) |
d828199e | 1585 | { |
a5a1d1c2 | 1586 | u64 ret = (u64)rdtsc_ordered(); |
03b9730b | 1587 | u64 last = pvclock_gtod_data.clock.cycle_last; |
d828199e MT |
1588 | |
1589 | if (likely(ret >= last)) | |
1590 | return ret; | |
1591 | ||
1592 | /* | |
1593 | * GCC likes to generate cmov here, but this branch is extremely | |
6a6256f9 | 1594 | * predictable (it's just a function of time and the likely is |
d828199e MT |
1595 | * very likely) and there's a data dependence, so force GCC |
1596 | * to generate a branch instead. I don't barrier() because | |
1597 | * we don't actually need a barrier, and if this function | |
1598 | * ever gets inlined it will generate worse code. | |
1599 | */ | |
1600 | asm volatile (""); | |
1601 | return last; | |
1602 | } | |
1603 | ||
a5a1d1c2 | 1604 | static inline u64 vgettsc(u64 *cycle_now) |
d828199e MT |
1605 | { |
1606 | long v; | |
1607 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1608 | ||
1609 | *cycle_now = read_tsc(); | |
1610 | ||
1611 | v = (*cycle_now - gtod->clock.cycle_last) & gtod->clock.mask; | |
1612 | return v * gtod->clock.mult; | |
1613 | } | |
1614 | ||
a5a1d1c2 | 1615 | static int do_monotonic_boot(s64 *t, u64 *cycle_now) |
d828199e | 1616 | { |
cbcf2dd3 | 1617 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; |
d828199e | 1618 | unsigned long seq; |
d828199e | 1619 | int mode; |
cbcf2dd3 | 1620 | u64 ns; |
d828199e | 1621 | |
d828199e MT |
1622 | do { |
1623 | seq = read_seqcount_begin(>od->seq); | |
1624 | mode = gtod->clock.vclock_mode; | |
cbcf2dd3 | 1625 | ns = gtod->nsec_base; |
d828199e MT |
1626 | ns += vgettsc(cycle_now); |
1627 | ns >>= gtod->clock.shift; | |
cbcf2dd3 | 1628 | ns += gtod->boot_ns; |
d828199e | 1629 | } while (unlikely(read_seqcount_retry(>od->seq, seq))); |
cbcf2dd3 | 1630 | *t = ns; |
d828199e MT |
1631 | |
1632 | return mode; | |
1633 | } | |
1634 | ||
55dd00a7 MT |
1635 | static int do_realtime(struct timespec *ts, u64 *cycle_now) |
1636 | { | |
1637 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1638 | unsigned long seq; | |
1639 | int mode; | |
1640 | u64 ns; | |
1641 | ||
1642 | do { | |
1643 | seq = read_seqcount_begin(>od->seq); | |
1644 | mode = gtod->clock.vclock_mode; | |
1645 | ts->tv_sec = gtod->wall_time_sec; | |
1646 | ns = gtod->nsec_base; | |
1647 | ns += vgettsc(cycle_now); | |
1648 | ns >>= gtod->clock.shift; | |
1649 | } while (unlikely(read_seqcount_retry(>od->seq, seq))); | |
1650 | ||
1651 | ts->tv_sec += __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns); | |
1652 | ts->tv_nsec = ns; | |
1653 | ||
1654 | return mode; | |
1655 | } | |
1656 | ||
d828199e | 1657 | /* returns true if host is using tsc clocksource */ |
a5a1d1c2 | 1658 | static bool kvm_get_time_and_clockread(s64 *kernel_ns, u64 *cycle_now) |
d828199e | 1659 | { |
d828199e MT |
1660 | /* checked again under seqlock below */ |
1661 | if (pvclock_gtod_data.clock.vclock_mode != VCLOCK_TSC) | |
1662 | return false; | |
1663 | ||
cbcf2dd3 | 1664 | return do_monotonic_boot(kernel_ns, cycle_now) == VCLOCK_TSC; |
d828199e | 1665 | } |
55dd00a7 MT |
1666 | |
1667 | /* returns true if host is using tsc clocksource */ | |
1668 | static bool kvm_get_walltime_and_clockread(struct timespec *ts, | |
1669 | u64 *cycle_now) | |
1670 | { | |
1671 | /* checked again under seqlock below */ | |
1672 | if (pvclock_gtod_data.clock.vclock_mode != VCLOCK_TSC) | |
1673 | return false; | |
1674 | ||
1675 | return do_realtime(ts, cycle_now) == VCLOCK_TSC; | |
1676 | } | |
d828199e MT |
1677 | #endif |
1678 | ||
1679 | /* | |
1680 | * | |
b48aa97e MT |
1681 | * Assuming a stable TSC across physical CPUS, and a stable TSC |
1682 | * across virtual CPUs, the following condition is possible. | |
1683 | * Each numbered line represents an event visible to both | |
d828199e MT |
1684 | * CPUs at the next numbered event. |
1685 | * | |
1686 | * "timespecX" represents host monotonic time. "tscX" represents | |
1687 | * RDTSC value. | |
1688 | * | |
1689 | * VCPU0 on CPU0 | VCPU1 on CPU1 | |
1690 | * | |
1691 | * 1. read timespec0,tsc0 | |
1692 | * 2. | timespec1 = timespec0 + N | |
1693 | * | tsc1 = tsc0 + M | |
1694 | * 3. transition to guest | transition to guest | |
1695 | * 4. ret0 = timespec0 + (rdtsc - tsc0) | | |
1696 | * 5. | ret1 = timespec1 + (rdtsc - tsc1) | |
1697 | * | ret1 = timespec0 + N + (rdtsc - (tsc0 + M)) | |
1698 | * | |
1699 | * Since ret0 update is visible to VCPU1 at time 5, to obey monotonicity: | |
1700 | * | |
1701 | * - ret0 < ret1 | |
1702 | * - timespec0 + (rdtsc - tsc0) < timespec0 + N + (rdtsc - (tsc0 + M)) | |
1703 | * ... | |
1704 | * - 0 < N - M => M < N | |
1705 | * | |
1706 | * That is, when timespec0 != timespec1, M < N. Unfortunately that is not | |
1707 | * always the case (the difference between two distinct xtime instances | |
1708 | * might be smaller then the difference between corresponding TSC reads, | |
1709 | * when updating guest vcpus pvclock areas). | |
1710 | * | |
1711 | * To avoid that problem, do not allow visibility of distinct | |
1712 | * system_timestamp/tsc_timestamp values simultaneously: use a master | |
1713 | * copy of host monotonic time values. Update that master copy | |
1714 | * in lockstep. | |
1715 | * | |
b48aa97e | 1716 | * Rely on synchronization of host TSCs and guest TSCs for monotonicity. |
d828199e MT |
1717 | * |
1718 | */ | |
1719 | ||
1720 | static void pvclock_update_vm_gtod_copy(struct kvm *kvm) | |
1721 | { | |
1722 | #ifdef CONFIG_X86_64 | |
1723 | struct kvm_arch *ka = &kvm->arch; | |
1724 | int vclock_mode; | |
b48aa97e MT |
1725 | bool host_tsc_clocksource, vcpus_matched; |
1726 | ||
1727 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1728 | atomic_read(&kvm->online_vcpus)); | |
d828199e MT |
1729 | |
1730 | /* | |
1731 | * If the host uses TSC clock, then passthrough TSC as stable | |
1732 | * to the guest. | |
1733 | */ | |
b48aa97e | 1734 | host_tsc_clocksource = kvm_get_time_and_clockread( |
d828199e MT |
1735 | &ka->master_kernel_ns, |
1736 | &ka->master_cycle_now); | |
1737 | ||
16a96021 | 1738 | ka->use_master_clock = host_tsc_clocksource && vcpus_matched |
a826faf1 | 1739 | && !ka->backwards_tsc_observed |
54750f2c | 1740 | && !ka->boot_vcpu_runs_old_kvmclock; |
b48aa97e | 1741 | |
d828199e MT |
1742 | if (ka->use_master_clock) |
1743 | atomic_set(&kvm_guest_has_master_clock, 1); | |
1744 | ||
1745 | vclock_mode = pvclock_gtod_data.clock.vclock_mode; | |
b48aa97e MT |
1746 | trace_kvm_update_master_clock(ka->use_master_clock, vclock_mode, |
1747 | vcpus_matched); | |
d828199e MT |
1748 | #endif |
1749 | } | |
1750 | ||
2860c4b1 PB |
1751 | void kvm_make_mclock_inprogress_request(struct kvm *kvm) |
1752 | { | |
1753 | kvm_make_all_cpus_request(kvm, KVM_REQ_MCLOCK_INPROGRESS); | |
1754 | } | |
1755 | ||
2e762ff7 MT |
1756 | static void kvm_gen_update_masterclock(struct kvm *kvm) |
1757 | { | |
1758 | #ifdef CONFIG_X86_64 | |
1759 | int i; | |
1760 | struct kvm_vcpu *vcpu; | |
1761 | struct kvm_arch *ka = &kvm->arch; | |
1762 | ||
1763 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
1764 | kvm_make_mclock_inprogress_request(kvm); | |
1765 | /* no guest entries from this point */ | |
1766 | pvclock_update_vm_gtod_copy(kvm); | |
1767 | ||
1768 | kvm_for_each_vcpu(i, vcpu, kvm) | |
105b21bb | 1769 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
2e762ff7 MT |
1770 | |
1771 | /* guest entries allowed */ | |
1772 | kvm_for_each_vcpu(i, vcpu, kvm) | |
72875d8a | 1773 | kvm_clear_request(KVM_REQ_MCLOCK_INPROGRESS, vcpu); |
2e762ff7 MT |
1774 | |
1775 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
1776 | #endif | |
1777 | } | |
1778 | ||
e891a32e | 1779 | u64 get_kvmclock_ns(struct kvm *kvm) |
108b249c | 1780 | { |
108b249c | 1781 | struct kvm_arch *ka = &kvm->arch; |
8b953440 | 1782 | struct pvclock_vcpu_time_info hv_clock; |
e2c2206a | 1783 | u64 ret; |
108b249c | 1784 | |
8b953440 PB |
1785 | spin_lock(&ka->pvclock_gtod_sync_lock); |
1786 | if (!ka->use_master_clock) { | |
1787 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
1788 | return ktime_get_boot_ns() + ka->kvmclock_offset; | |
108b249c PB |
1789 | } |
1790 | ||
8b953440 PB |
1791 | hv_clock.tsc_timestamp = ka->master_cycle_now; |
1792 | hv_clock.system_time = ka->master_kernel_ns + ka->kvmclock_offset; | |
1793 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
1794 | ||
e2c2206a WL |
1795 | /* both __this_cpu_read() and rdtsc() should be on the same cpu */ |
1796 | get_cpu(); | |
1797 | ||
8b953440 PB |
1798 | kvm_get_time_scale(NSEC_PER_SEC, __this_cpu_read(cpu_tsc_khz) * 1000LL, |
1799 | &hv_clock.tsc_shift, | |
1800 | &hv_clock.tsc_to_system_mul); | |
e2c2206a WL |
1801 | ret = __pvclock_read_cycles(&hv_clock, rdtsc()); |
1802 | ||
1803 | put_cpu(); | |
1804 | ||
1805 | return ret; | |
108b249c PB |
1806 | } |
1807 | ||
0d6dd2ff PB |
1808 | static void kvm_setup_pvclock_page(struct kvm_vcpu *v) |
1809 | { | |
1810 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
1811 | struct pvclock_vcpu_time_info guest_hv_clock; | |
1812 | ||
4e335d9e | 1813 | if (unlikely(kvm_read_guest_cached(v->kvm, &vcpu->pv_time, |
0d6dd2ff PB |
1814 | &guest_hv_clock, sizeof(guest_hv_clock)))) |
1815 | return; | |
1816 | ||
1817 | /* This VCPU is paused, but it's legal for a guest to read another | |
1818 | * VCPU's kvmclock, so we really have to follow the specification where | |
1819 | * it says that version is odd if data is being modified, and even after | |
1820 | * it is consistent. | |
1821 | * | |
1822 | * Version field updates must be kept separate. This is because | |
1823 | * kvm_write_guest_cached might use a "rep movs" instruction, and | |
1824 | * writes within a string instruction are weakly ordered. So there | |
1825 | * are three writes overall. | |
1826 | * | |
1827 | * As a small optimization, only write the version field in the first | |
1828 | * and third write. The vcpu->pv_time cache is still valid, because the | |
1829 | * version field is the first in the struct. | |
1830 | */ | |
1831 | BUILD_BUG_ON(offsetof(struct pvclock_vcpu_time_info, version) != 0); | |
1832 | ||
1833 | vcpu->hv_clock.version = guest_hv_clock.version + 1; | |
4e335d9e PB |
1834 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
1835 | &vcpu->hv_clock, | |
1836 | sizeof(vcpu->hv_clock.version)); | |
0d6dd2ff PB |
1837 | |
1838 | smp_wmb(); | |
1839 | ||
1840 | /* retain PVCLOCK_GUEST_STOPPED if set in guest copy */ | |
1841 | vcpu->hv_clock.flags |= (guest_hv_clock.flags & PVCLOCK_GUEST_STOPPED); | |
1842 | ||
1843 | if (vcpu->pvclock_set_guest_stopped_request) { | |
1844 | vcpu->hv_clock.flags |= PVCLOCK_GUEST_STOPPED; | |
1845 | vcpu->pvclock_set_guest_stopped_request = false; | |
1846 | } | |
1847 | ||
1848 | trace_kvm_pvclock_update(v->vcpu_id, &vcpu->hv_clock); | |
1849 | ||
4e335d9e PB |
1850 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
1851 | &vcpu->hv_clock, | |
1852 | sizeof(vcpu->hv_clock)); | |
0d6dd2ff PB |
1853 | |
1854 | smp_wmb(); | |
1855 | ||
1856 | vcpu->hv_clock.version++; | |
4e335d9e PB |
1857 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
1858 | &vcpu->hv_clock, | |
1859 | sizeof(vcpu->hv_clock.version)); | |
0d6dd2ff PB |
1860 | } |
1861 | ||
34c238a1 | 1862 | static int kvm_guest_time_update(struct kvm_vcpu *v) |
18068523 | 1863 | { |
78db6a50 | 1864 | unsigned long flags, tgt_tsc_khz; |
18068523 | 1865 | struct kvm_vcpu_arch *vcpu = &v->arch; |
d828199e | 1866 | struct kvm_arch *ka = &v->kvm->arch; |
f25e656d | 1867 | s64 kernel_ns; |
d828199e | 1868 | u64 tsc_timestamp, host_tsc; |
51d59c6b | 1869 | u8 pvclock_flags; |
d828199e MT |
1870 | bool use_master_clock; |
1871 | ||
1872 | kernel_ns = 0; | |
1873 | host_tsc = 0; | |
18068523 | 1874 | |
d828199e MT |
1875 | /* |
1876 | * If the host uses TSC clock, then passthrough TSC as stable | |
1877 | * to the guest. | |
1878 | */ | |
1879 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
1880 | use_master_clock = ka->use_master_clock; | |
1881 | if (use_master_clock) { | |
1882 | host_tsc = ka->master_cycle_now; | |
1883 | kernel_ns = ka->master_kernel_ns; | |
1884 | } | |
1885 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
c09664bb MT |
1886 | |
1887 | /* Keep irq disabled to prevent changes to the clock */ | |
1888 | local_irq_save(flags); | |
78db6a50 PB |
1889 | tgt_tsc_khz = __this_cpu_read(cpu_tsc_khz); |
1890 | if (unlikely(tgt_tsc_khz == 0)) { | |
c09664bb MT |
1891 | local_irq_restore(flags); |
1892 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); | |
1893 | return 1; | |
1894 | } | |
d828199e | 1895 | if (!use_master_clock) { |
4ea1636b | 1896 | host_tsc = rdtsc(); |
108b249c | 1897 | kernel_ns = ktime_get_boot_ns(); |
d828199e MT |
1898 | } |
1899 | ||
4ba76538 | 1900 | tsc_timestamp = kvm_read_l1_tsc(v, host_tsc); |
d828199e | 1901 | |
c285545f ZA |
1902 | /* |
1903 | * We may have to catch up the TSC to match elapsed wall clock | |
1904 | * time for two reasons, even if kvmclock is used. | |
1905 | * 1) CPU could have been running below the maximum TSC rate | |
1906 | * 2) Broken TSC compensation resets the base at each VCPU | |
1907 | * entry to avoid unknown leaps of TSC even when running | |
1908 | * again on the same CPU. This may cause apparent elapsed | |
1909 | * time to disappear, and the guest to stand still or run | |
1910 | * very slowly. | |
1911 | */ | |
1912 | if (vcpu->tsc_catchup) { | |
1913 | u64 tsc = compute_guest_tsc(v, kernel_ns); | |
1914 | if (tsc > tsc_timestamp) { | |
f1e2b260 | 1915 | adjust_tsc_offset_guest(v, tsc - tsc_timestamp); |
c285545f ZA |
1916 | tsc_timestamp = tsc; |
1917 | } | |
50d0a0f9 GH |
1918 | } |
1919 | ||
18068523 GOC |
1920 | local_irq_restore(flags); |
1921 | ||
0d6dd2ff | 1922 | /* With all the info we got, fill in the values */ |
18068523 | 1923 | |
78db6a50 PB |
1924 | if (kvm_has_tsc_control) |
1925 | tgt_tsc_khz = kvm_scale_tsc(v, tgt_tsc_khz); | |
1926 | ||
1927 | if (unlikely(vcpu->hw_tsc_khz != tgt_tsc_khz)) { | |
3ae13faa | 1928 | kvm_get_time_scale(NSEC_PER_SEC, tgt_tsc_khz * 1000LL, |
5f4e3f88 ZA |
1929 | &vcpu->hv_clock.tsc_shift, |
1930 | &vcpu->hv_clock.tsc_to_system_mul); | |
78db6a50 | 1931 | vcpu->hw_tsc_khz = tgt_tsc_khz; |
8cfdc000 ZA |
1932 | } |
1933 | ||
1d5f066e | 1934 | vcpu->hv_clock.tsc_timestamp = tsc_timestamp; |
759379dd | 1935 | vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset; |
28e4639a | 1936 | vcpu->last_guest_tsc = tsc_timestamp; |
51d59c6b | 1937 | |
d828199e | 1938 | /* If the host uses TSC clocksource, then it is stable */ |
0d6dd2ff | 1939 | pvclock_flags = 0; |
d828199e MT |
1940 | if (use_master_clock) |
1941 | pvclock_flags |= PVCLOCK_TSC_STABLE_BIT; | |
1942 | ||
78c0337a MT |
1943 | vcpu->hv_clock.flags = pvclock_flags; |
1944 | ||
095cf55d PB |
1945 | if (vcpu->pv_time_enabled) |
1946 | kvm_setup_pvclock_page(v); | |
1947 | if (v == kvm_get_vcpu(v->kvm, 0)) | |
1948 | kvm_hv_setup_tsc_page(v->kvm, &vcpu->hv_clock); | |
8cfdc000 | 1949 | return 0; |
c8076604 GH |
1950 | } |
1951 | ||
0061d53d MT |
1952 | /* |
1953 | * kvmclock updates which are isolated to a given vcpu, such as | |
1954 | * vcpu->cpu migration, should not allow system_timestamp from | |
1955 | * the rest of the vcpus to remain static. Otherwise ntp frequency | |
1956 | * correction applies to one vcpu's system_timestamp but not | |
1957 | * the others. | |
1958 | * | |
1959 | * So in those cases, request a kvmclock update for all vcpus. | |
7e44e449 AJ |
1960 | * We need to rate-limit these requests though, as they can |
1961 | * considerably slow guests that have a large number of vcpus. | |
1962 | * The time for a remote vcpu to update its kvmclock is bound | |
1963 | * by the delay we use to rate-limit the updates. | |
0061d53d MT |
1964 | */ |
1965 | ||
7e44e449 AJ |
1966 | #define KVMCLOCK_UPDATE_DELAY msecs_to_jiffies(100) |
1967 | ||
1968 | static void kvmclock_update_fn(struct work_struct *work) | |
0061d53d MT |
1969 | { |
1970 | int i; | |
7e44e449 AJ |
1971 | struct delayed_work *dwork = to_delayed_work(work); |
1972 | struct kvm_arch *ka = container_of(dwork, struct kvm_arch, | |
1973 | kvmclock_update_work); | |
1974 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
0061d53d MT |
1975 | struct kvm_vcpu *vcpu; |
1976 | ||
1977 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
105b21bb | 1978 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0061d53d MT |
1979 | kvm_vcpu_kick(vcpu); |
1980 | } | |
1981 | } | |
1982 | ||
7e44e449 AJ |
1983 | static void kvm_gen_kvmclock_update(struct kvm_vcpu *v) |
1984 | { | |
1985 | struct kvm *kvm = v->kvm; | |
1986 | ||
105b21bb | 1987 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); |
7e44e449 AJ |
1988 | schedule_delayed_work(&kvm->arch.kvmclock_update_work, |
1989 | KVMCLOCK_UPDATE_DELAY); | |
1990 | } | |
1991 | ||
332967a3 AJ |
1992 | #define KVMCLOCK_SYNC_PERIOD (300 * HZ) |
1993 | ||
1994 | static void kvmclock_sync_fn(struct work_struct *work) | |
1995 | { | |
1996 | struct delayed_work *dwork = to_delayed_work(work); | |
1997 | struct kvm_arch *ka = container_of(dwork, struct kvm_arch, | |
1998 | kvmclock_sync_work); | |
1999 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
2000 | ||
630994b3 MT |
2001 | if (!kvmclock_periodic_sync) |
2002 | return; | |
2003 | ||
332967a3 AJ |
2004 | schedule_delayed_work(&kvm->arch.kvmclock_update_work, 0); |
2005 | schedule_delayed_work(&kvm->arch.kvmclock_sync_work, | |
2006 | KVMCLOCK_SYNC_PERIOD); | |
2007 | } | |
2008 | ||
890ca9ae | 2009 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
15c4a640 | 2010 | { |
890ca9ae HY |
2011 | u64 mcg_cap = vcpu->arch.mcg_cap; |
2012 | unsigned bank_num = mcg_cap & 0xff; | |
2013 | ||
15c4a640 | 2014 | switch (msr) { |
15c4a640 | 2015 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 2016 | vcpu->arch.mcg_status = data; |
15c4a640 | 2017 | break; |
c7ac679c | 2018 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
2019 | if (!(mcg_cap & MCG_CTL_P)) |
2020 | return 1; | |
2021 | if (data != 0 && data != ~(u64)0) | |
2022 | return -1; | |
2023 | vcpu->arch.mcg_ctl = data; | |
2024 | break; | |
2025 | default: | |
2026 | if (msr >= MSR_IA32_MC0_CTL && | |
81760dcc | 2027 | msr < MSR_IA32_MCx_CTL(bank_num)) { |
890ca9ae | 2028 | u32 offset = msr - MSR_IA32_MC0_CTL; |
114be429 AP |
2029 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
2030 | * some Linux kernels though clear bit 10 in bank 4 to | |
2031 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore | |
2032 | * this to avoid an uncatched #GP in the guest | |
2033 | */ | |
890ca9ae | 2034 | if ((offset & 0x3) == 0 && |
114be429 | 2035 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
890ca9ae HY |
2036 | return -1; |
2037 | vcpu->arch.mce_banks[offset] = data; | |
2038 | break; | |
2039 | } | |
2040 | return 1; | |
2041 | } | |
2042 | return 0; | |
2043 | } | |
2044 | ||
ffde22ac ES |
2045 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
2046 | { | |
2047 | struct kvm *kvm = vcpu->kvm; | |
2048 | int lm = is_long_mode(vcpu); | |
2049 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
2050 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
2051 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
2052 | : kvm->arch.xen_hvm_config.blob_size_32; | |
2053 | u32 page_num = data & ~PAGE_MASK; | |
2054 | u64 page_addr = data & PAGE_MASK; | |
2055 | u8 *page; | |
2056 | int r; | |
2057 | ||
2058 | r = -E2BIG; | |
2059 | if (page_num >= blob_size) | |
2060 | goto out; | |
2061 | r = -ENOMEM; | |
ff5c2c03 SL |
2062 | page = memdup_user(blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE); |
2063 | if (IS_ERR(page)) { | |
2064 | r = PTR_ERR(page); | |
ffde22ac | 2065 | goto out; |
ff5c2c03 | 2066 | } |
54bf36aa | 2067 | if (kvm_vcpu_write_guest(vcpu, page_addr, page, PAGE_SIZE)) |
ffde22ac ES |
2068 | goto out_free; |
2069 | r = 0; | |
2070 | out_free: | |
2071 | kfree(page); | |
2072 | out: | |
2073 | return r; | |
2074 | } | |
2075 | ||
344d9588 GN |
2076 | static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data) |
2077 | { | |
2078 | gpa_t gpa = data & ~0x3f; | |
2079 | ||
52a5c155 WL |
2080 | /* Bits 3:5 are reserved, Should be zero */ |
2081 | if (data & 0x38) | |
344d9588 GN |
2082 | return 1; |
2083 | ||
2084 | vcpu->arch.apf.msr_val = data; | |
2085 | ||
2086 | if (!(data & KVM_ASYNC_PF_ENABLED)) { | |
2087 | kvm_clear_async_pf_completion_queue(vcpu); | |
2088 | kvm_async_pf_hash_reset(vcpu); | |
2089 | return 0; | |
2090 | } | |
2091 | ||
4e335d9e | 2092 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.apf.data, gpa, |
8f964525 | 2093 | sizeof(u32))) |
344d9588 GN |
2094 | return 1; |
2095 | ||
6adba527 | 2096 | vcpu->arch.apf.send_user_only = !(data & KVM_ASYNC_PF_SEND_ALWAYS); |
52a5c155 | 2097 | vcpu->arch.apf.delivery_as_pf_vmexit = data & KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT; |
344d9588 GN |
2098 | kvm_async_pf_wakeup_all(vcpu); |
2099 | return 0; | |
2100 | } | |
2101 | ||
12f9a48f GC |
2102 | static void kvmclock_reset(struct kvm_vcpu *vcpu) |
2103 | { | |
0b79459b | 2104 | vcpu->arch.pv_time_enabled = false; |
12f9a48f GC |
2105 | } |
2106 | ||
c9aaa895 GC |
2107 | static void record_steal_time(struct kvm_vcpu *vcpu) |
2108 | { | |
2109 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
2110 | return; | |
2111 | ||
4e335d9e | 2112 | if (unlikely(kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
c9aaa895 GC |
2113 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)))) |
2114 | return; | |
2115 | ||
0b9f6c46 PX |
2116 | vcpu->arch.st.steal.preempted = 0; |
2117 | ||
35f3fae1 WL |
2118 | if (vcpu->arch.st.steal.version & 1) |
2119 | vcpu->arch.st.steal.version += 1; /* first time write, random junk */ | |
2120 | ||
2121 | vcpu->arch.st.steal.version += 1; | |
2122 | ||
4e335d9e | 2123 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
35f3fae1 WL |
2124 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); |
2125 | ||
2126 | smp_wmb(); | |
2127 | ||
c54cdf14 LC |
2128 | vcpu->arch.st.steal.steal += current->sched_info.run_delay - |
2129 | vcpu->arch.st.last_steal; | |
2130 | vcpu->arch.st.last_steal = current->sched_info.run_delay; | |
35f3fae1 | 2131 | |
4e335d9e | 2132 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
35f3fae1 WL |
2133 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); |
2134 | ||
2135 | smp_wmb(); | |
2136 | ||
2137 | vcpu->arch.st.steal.version += 1; | |
c9aaa895 | 2138 | |
4e335d9e | 2139 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
c9aaa895 GC |
2140 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); |
2141 | } | |
2142 | ||
8fe8ab46 | 2143 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
15c4a640 | 2144 | { |
5753785f | 2145 | bool pr = false; |
8fe8ab46 WA |
2146 | u32 msr = msr_info->index; |
2147 | u64 data = msr_info->data; | |
5753785f | 2148 | |
15c4a640 | 2149 | switch (msr) { |
2e32b719 BP |
2150 | case MSR_AMD64_NB_CFG: |
2151 | case MSR_IA32_UCODE_REV: | |
2152 | case MSR_IA32_UCODE_WRITE: | |
2153 | case MSR_VM_HSAVE_PA: | |
2154 | case MSR_AMD64_PATCH_LOADER: | |
2155 | case MSR_AMD64_BU_CFG2: | |
405a353a | 2156 | case MSR_AMD64_DC_CFG: |
2e32b719 BP |
2157 | break; |
2158 | ||
15c4a640 | 2159 | case MSR_EFER: |
b69e8cae | 2160 | return set_efer(vcpu, data); |
8f1589d9 AP |
2161 | case MSR_K7_HWCR: |
2162 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
82494028 | 2163 | data &= ~(u64)0x100; /* ignore ignne emulation enable */ |
a223c313 | 2164 | data &= ~(u64)0x8; /* ignore TLB cache disable */ |
22d48b2d | 2165 | data &= ~(u64)0x40000; /* ignore Mc status write enable */ |
8f1589d9 | 2166 | if (data != 0) { |
a737f256 CD |
2167 | vcpu_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", |
2168 | data); | |
8f1589d9 AP |
2169 | return 1; |
2170 | } | |
15c4a640 | 2171 | break; |
f7c6d140 AP |
2172 | case MSR_FAM10H_MMIO_CONF_BASE: |
2173 | if (data != 0) { | |
a737f256 CD |
2174 | vcpu_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " |
2175 | "0x%llx\n", data); | |
f7c6d140 AP |
2176 | return 1; |
2177 | } | |
15c4a640 | 2178 | break; |
b5e2fec0 AG |
2179 | case MSR_IA32_DEBUGCTLMSR: |
2180 | if (!data) { | |
2181 | /* We support the non-activated case already */ | |
2182 | break; | |
2183 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
2184 | /* Values other than LBR and BTF are vendor-specific, | |
2185 | thus reserved and should throw a #GP */ | |
2186 | return 1; | |
2187 | } | |
a737f256 CD |
2188 | vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", |
2189 | __func__, data); | |
b5e2fec0 | 2190 | break; |
9ba075a6 | 2191 | case 0x200 ... 0x2ff: |
ff53604b | 2192 | return kvm_mtrr_set_msr(vcpu, msr, data); |
15c4a640 | 2193 | case MSR_IA32_APICBASE: |
58cb628d | 2194 | return kvm_set_apic_base(vcpu, msr_info); |
0105d1a5 GN |
2195 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
2196 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
a3e06bbe LJ |
2197 | case MSR_IA32_TSCDEADLINE: |
2198 | kvm_set_lapic_tscdeadline_msr(vcpu, data); | |
2199 | break; | |
ba904635 | 2200 | case MSR_IA32_TSC_ADJUST: |
d6321d49 | 2201 | if (guest_cpuid_has(vcpu, X86_FEATURE_TSC_ADJUST)) { |
ba904635 | 2202 | if (!msr_info->host_initiated) { |
d913b904 | 2203 | s64 adj = data - vcpu->arch.ia32_tsc_adjust_msr; |
d7add054 | 2204 | adjust_tsc_offset_guest(vcpu, adj); |
ba904635 WA |
2205 | } |
2206 | vcpu->arch.ia32_tsc_adjust_msr = data; | |
2207 | } | |
2208 | break; | |
15c4a640 | 2209 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 2210 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 2211 | break; |
64d60670 PB |
2212 | case MSR_IA32_SMBASE: |
2213 | if (!msr_info->host_initiated) | |
2214 | return 1; | |
2215 | vcpu->arch.smbase = data; | |
2216 | break; | |
11c6bffa | 2217 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
2218 | case MSR_KVM_WALL_CLOCK: |
2219 | vcpu->kvm->arch.wall_clock = data; | |
2220 | kvm_write_wall_clock(vcpu->kvm, data); | |
2221 | break; | |
11c6bffa | 2222 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 | 2223 | case MSR_KVM_SYSTEM_TIME: { |
54750f2c MT |
2224 | struct kvm_arch *ka = &vcpu->kvm->arch; |
2225 | ||
12f9a48f | 2226 | kvmclock_reset(vcpu); |
18068523 | 2227 | |
54750f2c MT |
2228 | if (vcpu->vcpu_id == 0 && !msr_info->host_initiated) { |
2229 | bool tmp = (msr == MSR_KVM_SYSTEM_TIME); | |
2230 | ||
2231 | if (ka->boot_vcpu_runs_old_kvmclock != tmp) | |
1bd2009e | 2232 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
54750f2c MT |
2233 | |
2234 | ka->boot_vcpu_runs_old_kvmclock = tmp; | |
2235 | } | |
2236 | ||
18068523 | 2237 | vcpu->arch.time = data; |
0061d53d | 2238 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
18068523 GOC |
2239 | |
2240 | /* we verify if the enable bit is set... */ | |
2241 | if (!(data & 1)) | |
2242 | break; | |
2243 | ||
4e335d9e | 2244 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, |
8f964525 AH |
2245 | &vcpu->arch.pv_time, data & ~1ULL, |
2246 | sizeof(struct pvclock_vcpu_time_info))) | |
0b79459b AH |
2247 | vcpu->arch.pv_time_enabled = false; |
2248 | else | |
2249 | vcpu->arch.pv_time_enabled = true; | |
32cad84f | 2250 | |
18068523 GOC |
2251 | break; |
2252 | } | |
344d9588 GN |
2253 | case MSR_KVM_ASYNC_PF_EN: |
2254 | if (kvm_pv_enable_async_pf(vcpu, data)) | |
2255 | return 1; | |
2256 | break; | |
c9aaa895 GC |
2257 | case MSR_KVM_STEAL_TIME: |
2258 | ||
2259 | if (unlikely(!sched_info_on())) | |
2260 | return 1; | |
2261 | ||
2262 | if (data & KVM_STEAL_RESERVED_MASK) | |
2263 | return 1; | |
2264 | ||
4e335d9e | 2265 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.st.stime, |
8f964525 AH |
2266 | data & KVM_STEAL_VALID_BITS, |
2267 | sizeof(struct kvm_steal_time))) | |
c9aaa895 GC |
2268 | return 1; |
2269 | ||
2270 | vcpu->arch.st.msr_val = data; | |
2271 | ||
2272 | if (!(data & KVM_MSR_ENABLED)) | |
2273 | break; | |
2274 | ||
c9aaa895 GC |
2275 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); |
2276 | ||
2277 | break; | |
ae7a2a3f MT |
2278 | case MSR_KVM_PV_EOI_EN: |
2279 | if (kvm_lapic_enable_pv_eoi(vcpu, data)) | |
2280 | return 1; | |
2281 | break; | |
c9aaa895 | 2282 | |
890ca9ae HY |
2283 | case MSR_IA32_MCG_CTL: |
2284 | case MSR_IA32_MCG_STATUS: | |
81760dcc | 2285 | case MSR_IA32_MC0_CTL ... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS) - 1: |
890ca9ae | 2286 | return set_msr_mce(vcpu, msr, data); |
71db6023 | 2287 | |
6912ac32 WH |
2288 | case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3: |
2289 | case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1: | |
2290 | pr = true; /* fall through */ | |
2291 | case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3: | |
2292 | case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1: | |
c6702c9d | 2293 | if (kvm_pmu_is_valid_msr(vcpu, msr)) |
afd80d85 | 2294 | return kvm_pmu_set_msr(vcpu, msr_info); |
5753785f GN |
2295 | |
2296 | if (pr || data != 0) | |
a737f256 CD |
2297 | vcpu_unimpl(vcpu, "disabled perfctr wrmsr: " |
2298 | "0x%x data 0x%llx\n", msr, data); | |
5753785f | 2299 | break; |
84e0cefa JS |
2300 | case MSR_K7_CLK_CTL: |
2301 | /* | |
2302 | * Ignore all writes to this no longer documented MSR. | |
2303 | * Writes are only relevant for old K7 processors, | |
2304 | * all pre-dating SVM, but a recommended workaround from | |
4a969980 | 2305 | * AMD for these chips. It is possible to specify the |
84e0cefa JS |
2306 | * affected processor models on the command line, hence |
2307 | * the need to ignore the workaround. | |
2308 | */ | |
2309 | break; | |
55cd8e5a | 2310 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
e7d9513b AS |
2311 | case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: |
2312 | case HV_X64_MSR_CRASH_CTL: | |
1f4b34f8 | 2313 | case HV_X64_MSR_STIMER0_CONFIG ... HV_X64_MSR_STIMER3_COUNT: |
e7d9513b AS |
2314 | return kvm_hv_set_msr_common(vcpu, msr, data, |
2315 | msr_info->host_initiated); | |
91c9c3ed | 2316 | case MSR_IA32_BBL_CR_CTL3: |
2317 | /* Drop writes to this legacy MSR -- see rdmsr | |
2318 | * counterpart for further detail. | |
2319 | */ | |
796f4687 | 2320 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data 0x%llx\n", msr, data); |
91c9c3ed | 2321 | break; |
2b036c6b | 2322 | case MSR_AMD64_OSVW_ID_LENGTH: |
d6321d49 | 2323 | if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW)) |
2b036c6b BO |
2324 | return 1; |
2325 | vcpu->arch.osvw.length = data; | |
2326 | break; | |
2327 | case MSR_AMD64_OSVW_STATUS: | |
d6321d49 | 2328 | if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW)) |
2b036c6b BO |
2329 | return 1; |
2330 | vcpu->arch.osvw.status = data; | |
2331 | break; | |
db2336a8 KH |
2332 | case MSR_PLATFORM_INFO: |
2333 | if (!msr_info->host_initiated || | |
2334 | data & ~MSR_PLATFORM_INFO_CPUID_FAULT || | |
2335 | (!(data & MSR_PLATFORM_INFO_CPUID_FAULT) && | |
2336 | cpuid_fault_enabled(vcpu))) | |
2337 | return 1; | |
2338 | vcpu->arch.msr_platform_info = data; | |
2339 | break; | |
2340 | case MSR_MISC_FEATURES_ENABLES: | |
2341 | if (data & ~MSR_MISC_FEATURES_ENABLES_CPUID_FAULT || | |
2342 | (data & MSR_MISC_FEATURES_ENABLES_CPUID_FAULT && | |
2343 | !supports_cpuid_fault(vcpu))) | |
2344 | return 1; | |
2345 | vcpu->arch.msr_misc_features_enables = data; | |
2346 | break; | |
15c4a640 | 2347 | default: |
ffde22ac ES |
2348 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
2349 | return xen_hvm_config(vcpu, data); | |
c6702c9d | 2350 | if (kvm_pmu_is_valid_msr(vcpu, msr)) |
afd80d85 | 2351 | return kvm_pmu_set_msr(vcpu, msr_info); |
ed85c068 | 2352 | if (!ignore_msrs) { |
ae0f5499 | 2353 | vcpu_debug_ratelimited(vcpu, "unhandled wrmsr: 0x%x data 0x%llx\n", |
a737f256 | 2354 | msr, data); |
ed85c068 AP |
2355 | return 1; |
2356 | } else { | |
796f4687 | 2357 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data 0x%llx\n", |
a737f256 | 2358 | msr, data); |
ed85c068 AP |
2359 | break; |
2360 | } | |
15c4a640 CO |
2361 | } |
2362 | return 0; | |
2363 | } | |
2364 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
2365 | ||
2366 | ||
2367 | /* | |
2368 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
2369 | * Returns 0 on success, non-0 otherwise. | |
2370 | * Assumes vcpu_load() was already called. | |
2371 | */ | |
609e36d3 | 2372 | int kvm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
15c4a640 | 2373 | { |
609e36d3 | 2374 | return kvm_x86_ops->get_msr(vcpu, msr); |
15c4a640 | 2375 | } |
ff651cb6 | 2376 | EXPORT_SYMBOL_GPL(kvm_get_msr); |
15c4a640 | 2377 | |
890ca9ae | 2378 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
2379 | { |
2380 | u64 data; | |
890ca9ae HY |
2381 | u64 mcg_cap = vcpu->arch.mcg_cap; |
2382 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
2383 | |
2384 | switch (msr) { | |
15c4a640 CO |
2385 | case MSR_IA32_P5_MC_ADDR: |
2386 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
2387 | data = 0; |
2388 | break; | |
15c4a640 | 2389 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
2390 | data = vcpu->arch.mcg_cap; |
2391 | break; | |
c7ac679c | 2392 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
2393 | if (!(mcg_cap & MCG_CTL_P)) |
2394 | return 1; | |
2395 | data = vcpu->arch.mcg_ctl; | |
2396 | break; | |
2397 | case MSR_IA32_MCG_STATUS: | |
2398 | data = vcpu->arch.mcg_status; | |
2399 | break; | |
2400 | default: | |
2401 | if (msr >= MSR_IA32_MC0_CTL && | |
81760dcc | 2402 | msr < MSR_IA32_MCx_CTL(bank_num)) { |
890ca9ae HY |
2403 | u32 offset = msr - MSR_IA32_MC0_CTL; |
2404 | data = vcpu->arch.mce_banks[offset]; | |
2405 | break; | |
2406 | } | |
2407 | return 1; | |
2408 | } | |
2409 | *pdata = data; | |
2410 | return 0; | |
2411 | } | |
2412 | ||
609e36d3 | 2413 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
890ca9ae | 2414 | { |
609e36d3 | 2415 | switch (msr_info->index) { |
890ca9ae | 2416 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 2417 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
2418 | case MSR_IA32_DEBUGCTLMSR: |
2419 | case MSR_IA32_LASTBRANCHFROMIP: | |
2420 | case MSR_IA32_LASTBRANCHTOIP: | |
2421 | case MSR_IA32_LASTINTFROMIP: | |
2422 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd | 2423 | case MSR_K8_SYSCFG: |
3afb1121 PB |
2424 | case MSR_K8_TSEG_ADDR: |
2425 | case MSR_K8_TSEG_MASK: | |
60af2ecd | 2426 | case MSR_K7_HWCR: |
61a6bd67 | 2427 | case MSR_VM_HSAVE_PA: |
1fdbd48c | 2428 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 2429 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 2430 | case MSR_FAM10H_MMIO_CONF_BASE: |
2e32b719 | 2431 | case MSR_AMD64_BU_CFG2: |
0c2df2a1 | 2432 | case MSR_IA32_PERF_CTL: |
405a353a | 2433 | case MSR_AMD64_DC_CFG: |
609e36d3 | 2434 | msr_info->data = 0; |
15c4a640 | 2435 | break; |
6912ac32 WH |
2436 | case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3: |
2437 | case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3: | |
2438 | case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1: | |
2439 | case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1: | |
c6702c9d | 2440 | if (kvm_pmu_is_valid_msr(vcpu, msr_info->index)) |
609e36d3 PB |
2441 | return kvm_pmu_get_msr(vcpu, msr_info->index, &msr_info->data); |
2442 | msr_info->data = 0; | |
5753785f | 2443 | break; |
742bc670 | 2444 | case MSR_IA32_UCODE_REV: |
609e36d3 | 2445 | msr_info->data = 0x100000000ULL; |
742bc670 | 2446 | break; |
9ba075a6 | 2447 | case MSR_MTRRcap: |
9ba075a6 | 2448 | case 0x200 ... 0x2ff: |
ff53604b | 2449 | return kvm_mtrr_get_msr(vcpu, msr_info->index, &msr_info->data); |
15c4a640 | 2450 | case 0xcd: /* fsb frequency */ |
609e36d3 | 2451 | msr_info->data = 3; |
15c4a640 | 2452 | break; |
7b914098 JS |
2453 | /* |
2454 | * MSR_EBC_FREQUENCY_ID | |
2455 | * Conservative value valid for even the basic CPU models. | |
2456 | * Models 0,1: 000 in bits 23:21 indicating a bus speed of | |
2457 | * 100MHz, model 2 000 in bits 18:16 indicating 100MHz, | |
2458 | * and 266MHz for model 3, or 4. Set Core Clock | |
2459 | * Frequency to System Bus Frequency Ratio to 1 (bits | |
2460 | * 31:24) even though these are only valid for CPU | |
2461 | * models > 2, however guests may end up dividing or | |
2462 | * multiplying by zero otherwise. | |
2463 | */ | |
2464 | case MSR_EBC_FREQUENCY_ID: | |
609e36d3 | 2465 | msr_info->data = 1 << 24; |
7b914098 | 2466 | break; |
15c4a640 | 2467 | case MSR_IA32_APICBASE: |
609e36d3 | 2468 | msr_info->data = kvm_get_apic_base(vcpu); |
15c4a640 | 2469 | break; |
0105d1a5 | 2470 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
609e36d3 | 2471 | return kvm_x2apic_msr_read(vcpu, msr_info->index, &msr_info->data); |
0105d1a5 | 2472 | break; |
a3e06bbe | 2473 | case MSR_IA32_TSCDEADLINE: |
609e36d3 | 2474 | msr_info->data = kvm_get_lapic_tscdeadline_msr(vcpu); |
a3e06bbe | 2475 | break; |
ba904635 | 2476 | case MSR_IA32_TSC_ADJUST: |
609e36d3 | 2477 | msr_info->data = (u64)vcpu->arch.ia32_tsc_adjust_msr; |
ba904635 | 2478 | break; |
15c4a640 | 2479 | case MSR_IA32_MISC_ENABLE: |
609e36d3 | 2480 | msr_info->data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 2481 | break; |
64d60670 PB |
2482 | case MSR_IA32_SMBASE: |
2483 | if (!msr_info->host_initiated) | |
2484 | return 1; | |
2485 | msr_info->data = vcpu->arch.smbase; | |
15c4a640 | 2486 | break; |
847f0ad8 AG |
2487 | case MSR_IA32_PERF_STATUS: |
2488 | /* TSC increment by tick */ | |
609e36d3 | 2489 | msr_info->data = 1000ULL; |
847f0ad8 | 2490 | /* CPU multiplier */ |
b0996ae4 | 2491 | msr_info->data |= (((uint64_t)4ULL) << 40); |
847f0ad8 | 2492 | break; |
15c4a640 | 2493 | case MSR_EFER: |
609e36d3 | 2494 | msr_info->data = vcpu->arch.efer; |
15c4a640 | 2495 | break; |
18068523 | 2496 | case MSR_KVM_WALL_CLOCK: |
11c6bffa | 2497 | case MSR_KVM_WALL_CLOCK_NEW: |
609e36d3 | 2498 | msr_info->data = vcpu->kvm->arch.wall_clock; |
18068523 GOC |
2499 | break; |
2500 | case MSR_KVM_SYSTEM_TIME: | |
11c6bffa | 2501 | case MSR_KVM_SYSTEM_TIME_NEW: |
609e36d3 | 2502 | msr_info->data = vcpu->arch.time; |
18068523 | 2503 | break; |
344d9588 | 2504 | case MSR_KVM_ASYNC_PF_EN: |
609e36d3 | 2505 | msr_info->data = vcpu->arch.apf.msr_val; |
344d9588 | 2506 | break; |
c9aaa895 | 2507 | case MSR_KVM_STEAL_TIME: |
609e36d3 | 2508 | msr_info->data = vcpu->arch.st.msr_val; |
c9aaa895 | 2509 | break; |
1d92128f | 2510 | case MSR_KVM_PV_EOI_EN: |
609e36d3 | 2511 | msr_info->data = vcpu->arch.pv_eoi.msr_val; |
1d92128f | 2512 | break; |
890ca9ae HY |
2513 | case MSR_IA32_P5_MC_ADDR: |
2514 | case MSR_IA32_P5_MC_TYPE: | |
2515 | case MSR_IA32_MCG_CAP: | |
2516 | case MSR_IA32_MCG_CTL: | |
2517 | case MSR_IA32_MCG_STATUS: | |
81760dcc | 2518 | case MSR_IA32_MC0_CTL ... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS) - 1: |
609e36d3 | 2519 | return get_msr_mce(vcpu, msr_info->index, &msr_info->data); |
84e0cefa JS |
2520 | case MSR_K7_CLK_CTL: |
2521 | /* | |
2522 | * Provide expected ramp-up count for K7. All other | |
2523 | * are set to zero, indicating minimum divisors for | |
2524 | * every field. | |
2525 | * | |
2526 | * This prevents guest kernels on AMD host with CPU | |
2527 | * type 6, model 8 and higher from exploding due to | |
2528 | * the rdmsr failing. | |
2529 | */ | |
609e36d3 | 2530 | msr_info->data = 0x20000000; |
84e0cefa | 2531 | break; |
55cd8e5a | 2532 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
e7d9513b AS |
2533 | case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: |
2534 | case HV_X64_MSR_CRASH_CTL: | |
1f4b34f8 | 2535 | case HV_X64_MSR_STIMER0_CONFIG ... HV_X64_MSR_STIMER3_COUNT: |
e83d5887 AS |
2536 | return kvm_hv_get_msr_common(vcpu, |
2537 | msr_info->index, &msr_info->data); | |
55cd8e5a | 2538 | break; |
91c9c3ed | 2539 | case MSR_IA32_BBL_CR_CTL3: |
2540 | /* This legacy MSR exists but isn't fully documented in current | |
2541 | * silicon. It is however accessed by winxp in very narrow | |
2542 | * scenarios where it sets bit #19, itself documented as | |
2543 | * a "reserved" bit. Best effort attempt to source coherent | |
2544 | * read data here should the balance of the register be | |
2545 | * interpreted by the guest: | |
2546 | * | |
2547 | * L2 cache control register 3: 64GB range, 256KB size, | |
2548 | * enabled, latency 0x1, configured | |
2549 | */ | |
609e36d3 | 2550 | msr_info->data = 0xbe702111; |
91c9c3ed | 2551 | break; |
2b036c6b | 2552 | case MSR_AMD64_OSVW_ID_LENGTH: |
d6321d49 | 2553 | if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW)) |
2b036c6b | 2554 | return 1; |
609e36d3 | 2555 | msr_info->data = vcpu->arch.osvw.length; |
2b036c6b BO |
2556 | break; |
2557 | case MSR_AMD64_OSVW_STATUS: | |
d6321d49 | 2558 | if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW)) |
2b036c6b | 2559 | return 1; |
609e36d3 | 2560 | msr_info->data = vcpu->arch.osvw.status; |
2b036c6b | 2561 | break; |
db2336a8 KH |
2562 | case MSR_PLATFORM_INFO: |
2563 | msr_info->data = vcpu->arch.msr_platform_info; | |
2564 | break; | |
2565 | case MSR_MISC_FEATURES_ENABLES: | |
2566 | msr_info->data = vcpu->arch.msr_misc_features_enables; | |
2567 | break; | |
15c4a640 | 2568 | default: |
c6702c9d | 2569 | if (kvm_pmu_is_valid_msr(vcpu, msr_info->index)) |
609e36d3 | 2570 | return kvm_pmu_get_msr(vcpu, msr_info->index, &msr_info->data); |
ed85c068 | 2571 | if (!ignore_msrs) { |
ae0f5499 BD |
2572 | vcpu_debug_ratelimited(vcpu, "unhandled rdmsr: 0x%x\n", |
2573 | msr_info->index); | |
ed85c068 AP |
2574 | return 1; |
2575 | } else { | |
609e36d3 PB |
2576 | vcpu_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr_info->index); |
2577 | msr_info->data = 0; | |
ed85c068 AP |
2578 | } |
2579 | break; | |
15c4a640 | 2580 | } |
15c4a640 CO |
2581 | return 0; |
2582 | } | |
2583 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
2584 | ||
313a3dc7 CO |
2585 | /* |
2586 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
2587 | * | |
2588 | * @return number of msrs set successfully. | |
2589 | */ | |
2590 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
2591 | struct kvm_msr_entry *entries, | |
2592 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2593 | unsigned index, u64 *data)) | |
2594 | { | |
f656ce01 | 2595 | int i, idx; |
313a3dc7 | 2596 | |
f656ce01 | 2597 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
313a3dc7 CO |
2598 | for (i = 0; i < msrs->nmsrs; ++i) |
2599 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2600 | break; | |
f656ce01 | 2601 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 2602 | |
313a3dc7 CO |
2603 | return i; |
2604 | } | |
2605 | ||
2606 | /* | |
2607 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2608 | * | |
2609 | * @return number of msrs set successfully. | |
2610 | */ | |
2611 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
2612 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2613 | unsigned index, u64 *data), | |
2614 | int writeback) | |
2615 | { | |
2616 | struct kvm_msrs msrs; | |
2617 | struct kvm_msr_entry *entries; | |
2618 | int r, n; | |
2619 | unsigned size; | |
2620 | ||
2621 | r = -EFAULT; | |
2622 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
2623 | goto out; | |
2624 | ||
2625 | r = -E2BIG; | |
2626 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2627 | goto out; | |
2628 | ||
313a3dc7 | 2629 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; |
ff5c2c03 SL |
2630 | entries = memdup_user(user_msrs->entries, size); |
2631 | if (IS_ERR(entries)) { | |
2632 | r = PTR_ERR(entries); | |
313a3dc7 | 2633 | goto out; |
ff5c2c03 | 2634 | } |
313a3dc7 CO |
2635 | |
2636 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
2637 | if (r < 0) | |
2638 | goto out_free; | |
2639 | ||
2640 | r = -EFAULT; | |
2641 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2642 | goto out_free; | |
2643 | ||
2644 | r = n; | |
2645 | ||
2646 | out_free: | |
7a73c028 | 2647 | kfree(entries); |
313a3dc7 CO |
2648 | out: |
2649 | return r; | |
2650 | } | |
2651 | ||
784aa3d7 | 2652 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
018d00d2 ZX |
2653 | { |
2654 | int r; | |
2655 | ||
2656 | switch (ext) { | |
2657 | case KVM_CAP_IRQCHIP: | |
2658 | case KVM_CAP_HLT: | |
2659 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 2660 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 2661 | case KVM_CAP_EXT_CPUID: |
9c15bb1d | 2662 | case KVM_CAP_EXT_EMUL_CPUID: |
c8076604 | 2663 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 2664 | case KVM_CAP_PIT: |
a28e4f5a | 2665 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 2666 | case KVM_CAP_MP_STATE: |
ed848624 | 2667 | case KVM_CAP_SYNC_MMU: |
a355c85c | 2668 | case KVM_CAP_USER_NMI: |
52d939a0 | 2669 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 2670 | case KVM_CAP_IRQ_INJECT_STATUS: |
d34e6b17 | 2671 | case KVM_CAP_IOEVENTFD: |
f848a5a8 | 2672 | case KVM_CAP_IOEVENTFD_NO_LENGTH: |
c5ff41ce | 2673 | case KVM_CAP_PIT2: |
e9f42757 | 2674 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 2675 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 2676 | case KVM_CAP_XEN_HVM: |
3cfc3092 | 2677 | case KVM_CAP_VCPU_EVENTS: |
55cd8e5a | 2678 | case KVM_CAP_HYPERV: |
10388a07 | 2679 | case KVM_CAP_HYPERV_VAPIC: |
c25bc163 | 2680 | case KVM_CAP_HYPERV_SPIN: |
5c919412 | 2681 | case KVM_CAP_HYPERV_SYNIC: |
efc479e6 | 2682 | case KVM_CAP_HYPERV_SYNIC2: |
d3457c87 | 2683 | case KVM_CAP_HYPERV_VP_INDEX: |
ab9f4ecb | 2684 | case KVM_CAP_PCI_SEGMENT: |
a1efbe77 | 2685 | case KVM_CAP_DEBUGREGS: |
d2be1651 | 2686 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
2d5b5a66 | 2687 | case KVM_CAP_XSAVE: |
344d9588 | 2688 | case KVM_CAP_ASYNC_PF: |
92a1f12d | 2689 | case KVM_CAP_GET_TSC_KHZ: |
1c0b28c2 | 2690 | case KVM_CAP_KVMCLOCK_CTRL: |
4d8b81ab | 2691 | case KVM_CAP_READONLY_MEM: |
5f66b620 | 2692 | case KVM_CAP_HYPERV_TIME: |
100943c5 | 2693 | case KVM_CAP_IOAPIC_POLARITY_IGNORED: |
defcf51f | 2694 | case KVM_CAP_TSC_DEADLINE_TIMER: |
90de4a18 NA |
2695 | case KVM_CAP_ENABLE_CAP_VM: |
2696 | case KVM_CAP_DISABLE_QUIRKS: | |
d71ba788 | 2697 | case KVM_CAP_SET_BOOT_CPU_ID: |
49df6397 | 2698 | case KVM_CAP_SPLIT_IRQCHIP: |
460df4c1 | 2699 | case KVM_CAP_IMMEDIATE_EXIT: |
018d00d2 ZX |
2700 | r = 1; |
2701 | break; | |
e3fd9a93 PB |
2702 | case KVM_CAP_ADJUST_CLOCK: |
2703 | r = KVM_CLOCK_TSC_STABLE; | |
2704 | break; | |
668fffa3 MT |
2705 | case KVM_CAP_X86_GUEST_MWAIT: |
2706 | r = kvm_mwait_in_guest(); | |
2707 | break; | |
6d396b55 PB |
2708 | case KVM_CAP_X86_SMM: |
2709 | /* SMBASE is usually relocated above 1M on modern chipsets, | |
2710 | * and SMM handlers might indeed rely on 4G segment limits, | |
2711 | * so do not report SMM to be available if real mode is | |
2712 | * emulated via vm86 mode. Still, do not go to great lengths | |
2713 | * to avoid userspace's usage of the feature, because it is a | |
2714 | * fringe case that is not enabled except via specific settings | |
2715 | * of the module parameters. | |
2716 | */ | |
2717 | r = kvm_x86_ops->cpu_has_high_real_mode_segbase(); | |
2718 | break; | |
774ead3a AK |
2719 | case KVM_CAP_VAPIC: |
2720 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
2721 | break; | |
f725230a | 2722 | case KVM_CAP_NR_VCPUS: |
8c3ba334 SL |
2723 | r = KVM_SOFT_MAX_VCPUS; |
2724 | break; | |
2725 | case KVM_CAP_MAX_VCPUS: | |
f725230a AK |
2726 | r = KVM_MAX_VCPUS; |
2727 | break; | |
a988b910 | 2728 | case KVM_CAP_NR_MEMSLOTS: |
bbacc0c1 | 2729 | r = KVM_USER_MEM_SLOTS; |
a988b910 | 2730 | break; |
a68a6a72 MT |
2731 | case KVM_CAP_PV_MMU: /* obsolete */ |
2732 | r = 0; | |
2f333bcb | 2733 | break; |
890ca9ae HY |
2734 | case KVM_CAP_MCE: |
2735 | r = KVM_MAX_MCE_BANKS; | |
2736 | break; | |
2d5b5a66 | 2737 | case KVM_CAP_XCRS: |
d366bf7e | 2738 | r = boot_cpu_has(X86_FEATURE_XSAVE); |
2d5b5a66 | 2739 | break; |
92a1f12d JR |
2740 | case KVM_CAP_TSC_CONTROL: |
2741 | r = kvm_has_tsc_control; | |
2742 | break; | |
37131313 RK |
2743 | case KVM_CAP_X2APIC_API: |
2744 | r = KVM_X2APIC_API_VALID_FLAGS; | |
2745 | break; | |
018d00d2 ZX |
2746 | default: |
2747 | r = 0; | |
2748 | break; | |
2749 | } | |
2750 | return r; | |
2751 | ||
2752 | } | |
2753 | ||
043405e1 CO |
2754 | long kvm_arch_dev_ioctl(struct file *filp, |
2755 | unsigned int ioctl, unsigned long arg) | |
2756 | { | |
2757 | void __user *argp = (void __user *)arg; | |
2758 | long r; | |
2759 | ||
2760 | switch (ioctl) { | |
2761 | case KVM_GET_MSR_INDEX_LIST: { | |
2762 | struct kvm_msr_list __user *user_msr_list = argp; | |
2763 | struct kvm_msr_list msr_list; | |
2764 | unsigned n; | |
2765 | ||
2766 | r = -EFAULT; | |
2767 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
2768 | goto out; | |
2769 | n = msr_list.nmsrs; | |
62ef68bb | 2770 | msr_list.nmsrs = num_msrs_to_save + num_emulated_msrs; |
043405e1 CO |
2771 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
2772 | goto out; | |
2773 | r = -E2BIG; | |
e125e7b6 | 2774 | if (n < msr_list.nmsrs) |
043405e1 CO |
2775 | goto out; |
2776 | r = -EFAULT; | |
2777 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
2778 | num_msrs_to_save * sizeof(u32))) | |
2779 | goto out; | |
e125e7b6 | 2780 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 | 2781 | &emulated_msrs, |
62ef68bb | 2782 | num_emulated_msrs * sizeof(u32))) |
043405e1 CO |
2783 | goto out; |
2784 | r = 0; | |
2785 | break; | |
2786 | } | |
9c15bb1d BP |
2787 | case KVM_GET_SUPPORTED_CPUID: |
2788 | case KVM_GET_EMULATED_CPUID: { | |
674eea0f AK |
2789 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
2790 | struct kvm_cpuid2 cpuid; | |
2791 | ||
2792 | r = -EFAULT; | |
2793 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2794 | goto out; | |
9c15bb1d BP |
2795 | |
2796 | r = kvm_dev_ioctl_get_cpuid(&cpuid, cpuid_arg->entries, | |
2797 | ioctl); | |
674eea0f AK |
2798 | if (r) |
2799 | goto out; | |
2800 | ||
2801 | r = -EFAULT; | |
2802 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2803 | goto out; | |
2804 | r = 0; | |
2805 | break; | |
2806 | } | |
890ca9ae | 2807 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
890ca9ae | 2808 | r = -EFAULT; |
c45dcc71 AR |
2809 | if (copy_to_user(argp, &kvm_mce_cap_supported, |
2810 | sizeof(kvm_mce_cap_supported))) | |
890ca9ae HY |
2811 | goto out; |
2812 | r = 0; | |
2813 | break; | |
2814 | } | |
043405e1 CO |
2815 | default: |
2816 | r = -EINVAL; | |
2817 | } | |
2818 | out: | |
2819 | return r; | |
2820 | } | |
2821 | ||
f5f48ee1 SY |
2822 | static void wbinvd_ipi(void *garbage) |
2823 | { | |
2824 | wbinvd(); | |
2825 | } | |
2826 | ||
2827 | static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
2828 | { | |
e0f0bbc5 | 2829 | return kvm_arch_has_noncoherent_dma(vcpu->kvm); |
f5f48ee1 SY |
2830 | } |
2831 | ||
313a3dc7 CO |
2832 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
2833 | { | |
f5f48ee1 SY |
2834 | /* Address WBINVD may be executed by guest */ |
2835 | if (need_emulate_wbinvd(vcpu)) { | |
2836 | if (kvm_x86_ops->has_wbinvd_exit()) | |
2837 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
2838 | else if (vcpu->cpu != -1 && vcpu->cpu != cpu) | |
2839 | smp_call_function_single(vcpu->cpu, | |
2840 | wbinvd_ipi, NULL, 1); | |
2841 | } | |
2842 | ||
313a3dc7 | 2843 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
8f6055cb | 2844 | |
0dd6a6ed ZA |
2845 | /* Apply any externally detected TSC adjustments (due to suspend) */ |
2846 | if (unlikely(vcpu->arch.tsc_offset_adjustment)) { | |
2847 | adjust_tsc_offset_host(vcpu, vcpu->arch.tsc_offset_adjustment); | |
2848 | vcpu->arch.tsc_offset_adjustment = 0; | |
105b21bb | 2849 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0dd6a6ed | 2850 | } |
8f6055cb | 2851 | |
48434c20 | 2852 | if (unlikely(vcpu->cpu != cpu) || check_tsc_unstable()) { |
6f526ec5 | 2853 | s64 tsc_delta = !vcpu->arch.last_host_tsc ? 0 : |
4ea1636b | 2854 | rdtsc() - vcpu->arch.last_host_tsc; |
e48672fa ZA |
2855 | if (tsc_delta < 0) |
2856 | mark_tsc_unstable("KVM discovered backwards TSC"); | |
ce7a058a | 2857 | |
c285545f | 2858 | if (check_tsc_unstable()) { |
07c1419a | 2859 | u64 offset = kvm_compute_tsc_offset(vcpu, |
b183aa58 | 2860 | vcpu->arch.last_guest_tsc); |
a545ab6a | 2861 | kvm_vcpu_write_tsc_offset(vcpu, offset); |
c285545f | 2862 | vcpu->arch.tsc_catchup = 1; |
c285545f | 2863 | } |
a749e247 PB |
2864 | |
2865 | if (kvm_lapic_hv_timer_in_use(vcpu)) | |
2866 | kvm_lapic_restart_hv_timer(vcpu); | |
2867 | ||
d98d07ca MT |
2868 | /* |
2869 | * On a host with synchronized TSC, there is no need to update | |
2870 | * kvmclock on vcpu->cpu migration | |
2871 | */ | |
2872 | if (!vcpu->kvm->arch.use_master_clock || vcpu->cpu == -1) | |
0061d53d | 2873 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
c285545f | 2874 | if (vcpu->cpu != cpu) |
1bd2009e | 2875 | kvm_make_request(KVM_REQ_MIGRATE_TIMER, vcpu); |
e48672fa | 2876 | vcpu->cpu = cpu; |
6b7d7e76 | 2877 | } |
c9aaa895 | 2878 | |
c9aaa895 | 2879 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); |
313a3dc7 CO |
2880 | } |
2881 | ||
0b9f6c46 PX |
2882 | static void kvm_steal_time_set_preempted(struct kvm_vcpu *vcpu) |
2883 | { | |
2884 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
2885 | return; | |
2886 | ||
2887 | vcpu->arch.st.steal.preempted = 1; | |
2888 | ||
4e335d9e | 2889 | kvm_write_guest_offset_cached(vcpu->kvm, &vcpu->arch.st.stime, |
0b9f6c46 PX |
2890 | &vcpu->arch.st.steal.preempted, |
2891 | offsetof(struct kvm_steal_time, preempted), | |
2892 | sizeof(vcpu->arch.st.steal.preempted)); | |
2893 | } | |
2894 | ||
313a3dc7 CO |
2895 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
2896 | { | |
cc0d907c | 2897 | int idx; |
de63ad4c LM |
2898 | |
2899 | if (vcpu->preempted) | |
2900 | vcpu->arch.preempted_in_kernel = !kvm_x86_ops->get_cpl(vcpu); | |
2901 | ||
931f261b AA |
2902 | /* |
2903 | * Disable page faults because we're in atomic context here. | |
2904 | * kvm_write_guest_offset_cached() would call might_fault() | |
2905 | * that relies on pagefault_disable() to tell if there's a | |
2906 | * bug. NOTE: the write to guest memory may not go through if | |
2907 | * during postcopy live migration or if there's heavy guest | |
2908 | * paging. | |
2909 | */ | |
2910 | pagefault_disable(); | |
cc0d907c AA |
2911 | /* |
2912 | * kvm_memslots() will be called by | |
2913 | * kvm_write_guest_offset_cached() so take the srcu lock. | |
2914 | */ | |
2915 | idx = srcu_read_lock(&vcpu->kvm->srcu); | |
0b9f6c46 | 2916 | kvm_steal_time_set_preempted(vcpu); |
cc0d907c | 2917 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
931f261b | 2918 | pagefault_enable(); |
02daab21 | 2919 | kvm_x86_ops->vcpu_put(vcpu); |
1c11e713 | 2920 | kvm_put_guest_fpu(vcpu); |
4ea1636b | 2921 | vcpu->arch.last_host_tsc = rdtsc(); |
313a3dc7 CO |
2922 | } |
2923 | ||
313a3dc7 CO |
2924 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
2925 | struct kvm_lapic_state *s) | |
2926 | { | |
76dfafd5 | 2927 | if (kvm_x86_ops->sync_pir_to_irr && vcpu->arch.apicv_active) |
d62caabb AS |
2928 | kvm_x86_ops->sync_pir_to_irr(vcpu); |
2929 | ||
a92e2543 | 2930 | return kvm_apic_get_state(vcpu, s); |
313a3dc7 CO |
2931 | } |
2932 | ||
2933 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
2934 | struct kvm_lapic_state *s) | |
2935 | { | |
a92e2543 RK |
2936 | int r; |
2937 | ||
2938 | r = kvm_apic_set_state(vcpu, s); | |
2939 | if (r) | |
2940 | return r; | |
cb142eb7 | 2941 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
2942 | |
2943 | return 0; | |
2944 | } | |
2945 | ||
127a457a MG |
2946 | static int kvm_cpu_accept_dm_intr(struct kvm_vcpu *vcpu) |
2947 | { | |
2948 | return (!lapic_in_kernel(vcpu) || | |
2949 | kvm_apic_accept_pic_intr(vcpu)); | |
2950 | } | |
2951 | ||
782d422b MG |
2952 | /* |
2953 | * if userspace requested an interrupt window, check that the | |
2954 | * interrupt window is open. | |
2955 | * | |
2956 | * No need to exit to userspace if we already have an interrupt queued. | |
2957 | */ | |
2958 | static int kvm_vcpu_ready_for_interrupt_injection(struct kvm_vcpu *vcpu) | |
2959 | { | |
2960 | return kvm_arch_interrupt_allowed(vcpu) && | |
2961 | !kvm_cpu_has_interrupt(vcpu) && | |
2962 | !kvm_event_needs_reinjection(vcpu) && | |
2963 | kvm_cpu_accept_dm_intr(vcpu); | |
2964 | } | |
2965 | ||
f77bc6a4 ZX |
2966 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2967 | struct kvm_interrupt *irq) | |
2968 | { | |
02cdb50f | 2969 | if (irq->irq >= KVM_NR_INTERRUPTS) |
f77bc6a4 | 2970 | return -EINVAL; |
1c1a9ce9 SR |
2971 | |
2972 | if (!irqchip_in_kernel(vcpu->kvm)) { | |
2973 | kvm_queue_interrupt(vcpu, irq->irq, false); | |
2974 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
2975 | return 0; | |
2976 | } | |
2977 | ||
2978 | /* | |
2979 | * With in-kernel LAPIC, we only use this to inject EXTINT, so | |
2980 | * fail for in-kernel 8259. | |
2981 | */ | |
2982 | if (pic_in_kernel(vcpu->kvm)) | |
f77bc6a4 | 2983 | return -ENXIO; |
f77bc6a4 | 2984 | |
1c1a9ce9 SR |
2985 | if (vcpu->arch.pending_external_vector != -1) |
2986 | return -EEXIST; | |
f77bc6a4 | 2987 | |
1c1a9ce9 | 2988 | vcpu->arch.pending_external_vector = irq->irq; |
934bf653 | 2989 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f77bc6a4 ZX |
2990 | return 0; |
2991 | } | |
2992 | ||
c4abb7c9 JK |
2993 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
2994 | { | |
c4abb7c9 | 2995 | kvm_inject_nmi(vcpu); |
c4abb7c9 JK |
2996 | |
2997 | return 0; | |
2998 | } | |
2999 | ||
f077825a PB |
3000 | static int kvm_vcpu_ioctl_smi(struct kvm_vcpu *vcpu) |
3001 | { | |
64d60670 PB |
3002 | kvm_make_request(KVM_REQ_SMI, vcpu); |
3003 | ||
f077825a PB |
3004 | return 0; |
3005 | } | |
3006 | ||
b209749f AK |
3007 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
3008 | struct kvm_tpr_access_ctl *tac) | |
3009 | { | |
3010 | if (tac->flags) | |
3011 | return -EINVAL; | |
3012 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
3013 | return 0; | |
3014 | } | |
3015 | ||
890ca9ae HY |
3016 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
3017 | u64 mcg_cap) | |
3018 | { | |
3019 | int r; | |
3020 | unsigned bank_num = mcg_cap & 0xff, bank; | |
3021 | ||
3022 | r = -EINVAL; | |
a9e38c3e | 3023 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae | 3024 | goto out; |
c45dcc71 | 3025 | if (mcg_cap & ~(kvm_mce_cap_supported | 0xff | 0xff0000)) |
890ca9ae HY |
3026 | goto out; |
3027 | r = 0; | |
3028 | vcpu->arch.mcg_cap = mcg_cap; | |
3029 | /* Init IA32_MCG_CTL to all 1s */ | |
3030 | if (mcg_cap & MCG_CTL_P) | |
3031 | vcpu->arch.mcg_ctl = ~(u64)0; | |
3032 | /* Init IA32_MCi_CTL to all 1s */ | |
3033 | for (bank = 0; bank < bank_num; bank++) | |
3034 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
c45dcc71 AR |
3035 | |
3036 | if (kvm_x86_ops->setup_mce) | |
3037 | kvm_x86_ops->setup_mce(vcpu); | |
890ca9ae HY |
3038 | out: |
3039 | return r; | |
3040 | } | |
3041 | ||
3042 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
3043 | struct kvm_x86_mce *mce) | |
3044 | { | |
3045 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
3046 | unsigned bank_num = mcg_cap & 0xff; | |
3047 | u64 *banks = vcpu->arch.mce_banks; | |
3048 | ||
3049 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
3050 | return -EINVAL; | |
3051 | /* | |
3052 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
3053 | * reporting is disabled | |
3054 | */ | |
3055 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
3056 | vcpu->arch.mcg_ctl != ~(u64)0) | |
3057 | return 0; | |
3058 | banks += 4 * mce->bank; | |
3059 | /* | |
3060 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
3061 | * reporting is disabled for the bank | |
3062 | */ | |
3063 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
3064 | return 0; | |
3065 | if (mce->status & MCI_STATUS_UC) { | |
3066 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 3067 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
a8eeb04a | 3068 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
890ca9ae HY |
3069 | return 0; |
3070 | } | |
3071 | if (banks[1] & MCI_STATUS_VAL) | |
3072 | mce->status |= MCI_STATUS_OVER; | |
3073 | banks[2] = mce->addr; | |
3074 | banks[3] = mce->misc; | |
3075 | vcpu->arch.mcg_status = mce->mcg_status; | |
3076 | banks[1] = mce->status; | |
3077 | kvm_queue_exception(vcpu, MC_VECTOR); | |
3078 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
3079 | || !(banks[1] & MCI_STATUS_UC)) { | |
3080 | if (banks[1] & MCI_STATUS_VAL) | |
3081 | mce->status |= MCI_STATUS_OVER; | |
3082 | banks[2] = mce->addr; | |
3083 | banks[3] = mce->misc; | |
3084 | banks[1] = mce->status; | |
3085 | } else | |
3086 | banks[1] |= MCI_STATUS_OVER; | |
3087 | return 0; | |
3088 | } | |
3089 | ||
3cfc3092 JK |
3090 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
3091 | struct kvm_vcpu_events *events) | |
3092 | { | |
7460fb4a | 3093 | process_nmi(vcpu); |
664f8e26 WL |
3094 | /* |
3095 | * FIXME: pass injected and pending separately. This is only | |
3096 | * needed for nested virtualization, whose state cannot be | |
3097 | * migrated yet. For now we can combine them. | |
3098 | */ | |
03b82a30 | 3099 | events->exception.injected = |
664f8e26 WL |
3100 | (vcpu->arch.exception.pending || |
3101 | vcpu->arch.exception.injected) && | |
03b82a30 | 3102 | !kvm_exception_is_soft(vcpu->arch.exception.nr); |
3cfc3092 JK |
3103 | events->exception.nr = vcpu->arch.exception.nr; |
3104 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
97e69aa6 | 3105 | events->exception.pad = 0; |
3cfc3092 JK |
3106 | events->exception.error_code = vcpu->arch.exception.error_code; |
3107 | ||
03b82a30 JK |
3108 | events->interrupt.injected = |
3109 | vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft; | |
3cfc3092 | 3110 | events->interrupt.nr = vcpu->arch.interrupt.nr; |
03b82a30 | 3111 | events->interrupt.soft = 0; |
37ccdcbe | 3112 | events->interrupt.shadow = kvm_x86_ops->get_interrupt_shadow(vcpu); |
3cfc3092 JK |
3113 | |
3114 | events->nmi.injected = vcpu->arch.nmi_injected; | |
7460fb4a | 3115 | events->nmi.pending = vcpu->arch.nmi_pending != 0; |
3cfc3092 | 3116 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); |
97e69aa6 | 3117 | events->nmi.pad = 0; |
3cfc3092 | 3118 | |
66450a21 | 3119 | events->sipi_vector = 0; /* never valid when reporting to user space */ |
3cfc3092 | 3120 | |
f077825a PB |
3121 | events->smi.smm = is_smm(vcpu); |
3122 | events->smi.pending = vcpu->arch.smi_pending; | |
3123 | events->smi.smm_inside_nmi = | |
3124 | !!(vcpu->arch.hflags & HF_SMM_INSIDE_NMI_MASK); | |
3125 | events->smi.latched_init = kvm_lapic_latched_init(vcpu); | |
3126 | ||
dab4b911 | 3127 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
f077825a PB |
3128 | | KVM_VCPUEVENT_VALID_SHADOW |
3129 | | KVM_VCPUEVENT_VALID_SMM); | |
97e69aa6 | 3130 | memset(&events->reserved, 0, sizeof(events->reserved)); |
3cfc3092 JK |
3131 | } |
3132 | ||
6ef4e07e XG |
3133 | static void kvm_set_hflags(struct kvm_vcpu *vcpu, unsigned emul_flags); |
3134 | ||
3cfc3092 JK |
3135 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, |
3136 | struct kvm_vcpu_events *events) | |
3137 | { | |
dab4b911 | 3138 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 | 3139 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
f077825a PB |
3140 | | KVM_VCPUEVENT_VALID_SHADOW |
3141 | | KVM_VCPUEVENT_VALID_SMM)) | |
3cfc3092 JK |
3142 | return -EINVAL; |
3143 | ||
78e546c8 | 3144 | if (events->exception.injected && |
28d06353 JM |
3145 | (events->exception.nr > 31 || events->exception.nr == NMI_VECTOR || |
3146 | is_guest_mode(vcpu))) | |
78e546c8 PB |
3147 | return -EINVAL; |
3148 | ||
28bf2888 DH |
3149 | /* INITs are latched while in SMM */ |
3150 | if (events->flags & KVM_VCPUEVENT_VALID_SMM && | |
3151 | (events->smi.smm || events->smi.pending) && | |
3152 | vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) | |
3153 | return -EINVAL; | |
3154 | ||
7460fb4a | 3155 | process_nmi(vcpu); |
664f8e26 | 3156 | vcpu->arch.exception.injected = false; |
3cfc3092 JK |
3157 | vcpu->arch.exception.pending = events->exception.injected; |
3158 | vcpu->arch.exception.nr = events->exception.nr; | |
3159 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
3160 | vcpu->arch.exception.error_code = events->exception.error_code; | |
3161 | ||
3162 | vcpu->arch.interrupt.pending = events->interrupt.injected; | |
3163 | vcpu->arch.interrupt.nr = events->interrupt.nr; | |
3164 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
48005f64 JK |
3165 | if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) |
3166 | kvm_x86_ops->set_interrupt_shadow(vcpu, | |
3167 | events->interrupt.shadow); | |
3cfc3092 JK |
3168 | |
3169 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
3170 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
3171 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
3172 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
3173 | ||
66450a21 | 3174 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR && |
bce87cce | 3175 | lapic_in_kernel(vcpu)) |
66450a21 | 3176 | vcpu->arch.apic->sipi_vector = events->sipi_vector; |
3cfc3092 | 3177 | |
f077825a | 3178 | if (events->flags & KVM_VCPUEVENT_VALID_SMM) { |
6ef4e07e | 3179 | u32 hflags = vcpu->arch.hflags; |
f077825a | 3180 | if (events->smi.smm) |
6ef4e07e | 3181 | hflags |= HF_SMM_MASK; |
f077825a | 3182 | else |
6ef4e07e XG |
3183 | hflags &= ~HF_SMM_MASK; |
3184 | kvm_set_hflags(vcpu, hflags); | |
3185 | ||
f077825a | 3186 | vcpu->arch.smi_pending = events->smi.pending; |
f4ef1910 WL |
3187 | |
3188 | if (events->smi.smm) { | |
3189 | if (events->smi.smm_inside_nmi) | |
3190 | vcpu->arch.hflags |= HF_SMM_INSIDE_NMI_MASK; | |
f077825a | 3191 | else |
f4ef1910 WL |
3192 | vcpu->arch.hflags &= ~HF_SMM_INSIDE_NMI_MASK; |
3193 | if (lapic_in_kernel(vcpu)) { | |
3194 | if (events->smi.latched_init) | |
3195 | set_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); | |
3196 | else | |
3197 | clear_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); | |
3198 | } | |
f077825a PB |
3199 | } |
3200 | } | |
3201 | ||
3842d135 AK |
3202 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
3203 | ||
3cfc3092 JK |
3204 | return 0; |
3205 | } | |
3206 | ||
a1efbe77 JK |
3207 | static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, |
3208 | struct kvm_debugregs *dbgregs) | |
3209 | { | |
73aaf249 JK |
3210 | unsigned long val; |
3211 | ||
a1efbe77 | 3212 | memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db)); |
16f8a6f9 | 3213 | kvm_get_dr(vcpu, 6, &val); |
73aaf249 | 3214 | dbgregs->dr6 = val; |
a1efbe77 JK |
3215 | dbgregs->dr7 = vcpu->arch.dr7; |
3216 | dbgregs->flags = 0; | |
97e69aa6 | 3217 | memset(&dbgregs->reserved, 0, sizeof(dbgregs->reserved)); |
a1efbe77 JK |
3218 | } |
3219 | ||
3220 | static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, | |
3221 | struct kvm_debugregs *dbgregs) | |
3222 | { | |
3223 | if (dbgregs->flags) | |
3224 | return -EINVAL; | |
3225 | ||
d14bdb55 PB |
3226 | if (dbgregs->dr6 & ~0xffffffffull) |
3227 | return -EINVAL; | |
3228 | if (dbgregs->dr7 & ~0xffffffffull) | |
3229 | return -EINVAL; | |
3230 | ||
a1efbe77 | 3231 | memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db)); |
ae561ede | 3232 | kvm_update_dr0123(vcpu); |
a1efbe77 | 3233 | vcpu->arch.dr6 = dbgregs->dr6; |
73aaf249 | 3234 | kvm_update_dr6(vcpu); |
a1efbe77 | 3235 | vcpu->arch.dr7 = dbgregs->dr7; |
9926c9fd | 3236 | kvm_update_dr7(vcpu); |
a1efbe77 | 3237 | |
a1efbe77 JK |
3238 | return 0; |
3239 | } | |
3240 | ||
df1daba7 PB |
3241 | #define XSTATE_COMPACTION_ENABLED (1ULL << 63) |
3242 | ||
3243 | static void fill_xsave(u8 *dest, struct kvm_vcpu *vcpu) | |
3244 | { | |
c47ada30 | 3245 | struct xregs_state *xsave = &vcpu->arch.guest_fpu.state.xsave; |
400e4b20 | 3246 | u64 xstate_bv = xsave->header.xfeatures; |
df1daba7 PB |
3247 | u64 valid; |
3248 | ||
3249 | /* | |
3250 | * Copy legacy XSAVE area, to avoid complications with CPUID | |
3251 | * leaves 0 and 1 in the loop below. | |
3252 | */ | |
3253 | memcpy(dest, xsave, XSAVE_HDR_OFFSET); | |
3254 | ||
3255 | /* Set XSTATE_BV */ | |
00c87e9a | 3256 | xstate_bv &= vcpu->arch.guest_supported_xcr0 | XFEATURE_MASK_FPSSE; |
df1daba7 PB |
3257 | *(u64 *)(dest + XSAVE_HDR_OFFSET) = xstate_bv; |
3258 | ||
3259 | /* | |
3260 | * Copy each region from the possibly compacted offset to the | |
3261 | * non-compacted offset. | |
3262 | */ | |
d91cab78 | 3263 | valid = xstate_bv & ~XFEATURE_MASK_FPSSE; |
df1daba7 PB |
3264 | while (valid) { |
3265 | u64 feature = valid & -valid; | |
3266 | int index = fls64(feature) - 1; | |
3267 | void *src = get_xsave_addr(xsave, feature); | |
3268 | ||
3269 | if (src) { | |
3270 | u32 size, offset, ecx, edx; | |
3271 | cpuid_count(XSTATE_CPUID, index, | |
3272 | &size, &offset, &ecx, &edx); | |
38cfd5e3 PB |
3273 | if (feature == XFEATURE_MASK_PKRU) |
3274 | memcpy(dest + offset, &vcpu->arch.pkru, | |
3275 | sizeof(vcpu->arch.pkru)); | |
3276 | else | |
3277 | memcpy(dest + offset, src, size); | |
3278 | ||
df1daba7 PB |
3279 | } |
3280 | ||
3281 | valid -= feature; | |
3282 | } | |
3283 | } | |
3284 | ||
3285 | static void load_xsave(struct kvm_vcpu *vcpu, u8 *src) | |
3286 | { | |
c47ada30 | 3287 | struct xregs_state *xsave = &vcpu->arch.guest_fpu.state.xsave; |
df1daba7 PB |
3288 | u64 xstate_bv = *(u64 *)(src + XSAVE_HDR_OFFSET); |
3289 | u64 valid; | |
3290 | ||
3291 | /* | |
3292 | * Copy legacy XSAVE area, to avoid complications with CPUID | |
3293 | * leaves 0 and 1 in the loop below. | |
3294 | */ | |
3295 | memcpy(xsave, src, XSAVE_HDR_OFFSET); | |
3296 | ||
3297 | /* Set XSTATE_BV and possibly XCOMP_BV. */ | |
400e4b20 | 3298 | xsave->header.xfeatures = xstate_bv; |
782511b0 | 3299 | if (boot_cpu_has(X86_FEATURE_XSAVES)) |
3a54450b | 3300 | xsave->header.xcomp_bv = host_xcr0 | XSTATE_COMPACTION_ENABLED; |
df1daba7 PB |
3301 | |
3302 | /* | |
3303 | * Copy each region from the non-compacted offset to the | |
3304 | * possibly compacted offset. | |
3305 | */ | |
d91cab78 | 3306 | valid = xstate_bv & ~XFEATURE_MASK_FPSSE; |
df1daba7 PB |
3307 | while (valid) { |
3308 | u64 feature = valid & -valid; | |
3309 | int index = fls64(feature) - 1; | |
3310 | void *dest = get_xsave_addr(xsave, feature); | |
3311 | ||
3312 | if (dest) { | |
3313 | u32 size, offset, ecx, edx; | |
3314 | cpuid_count(XSTATE_CPUID, index, | |
3315 | &size, &offset, &ecx, &edx); | |
38cfd5e3 PB |
3316 | if (feature == XFEATURE_MASK_PKRU) |
3317 | memcpy(&vcpu->arch.pkru, src + offset, | |
3318 | sizeof(vcpu->arch.pkru)); | |
3319 | else | |
3320 | memcpy(dest, src + offset, size); | |
ee4100da | 3321 | } |
df1daba7 PB |
3322 | |
3323 | valid -= feature; | |
3324 | } | |
3325 | } | |
3326 | ||
2d5b5a66 SY |
3327 | static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu, |
3328 | struct kvm_xsave *guest_xsave) | |
3329 | { | |
d366bf7e | 3330 | if (boot_cpu_has(X86_FEATURE_XSAVE)) { |
df1daba7 PB |
3331 | memset(guest_xsave, 0, sizeof(struct kvm_xsave)); |
3332 | fill_xsave((u8 *) guest_xsave->region, vcpu); | |
4344ee98 | 3333 | } else { |
2d5b5a66 | 3334 | memcpy(guest_xsave->region, |
7366ed77 | 3335 | &vcpu->arch.guest_fpu.state.fxsave, |
c47ada30 | 3336 | sizeof(struct fxregs_state)); |
2d5b5a66 | 3337 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] = |
d91cab78 | 3338 | XFEATURE_MASK_FPSSE; |
2d5b5a66 SY |
3339 | } |
3340 | } | |
3341 | ||
a575813b WL |
3342 | #define XSAVE_MXCSR_OFFSET 24 |
3343 | ||
2d5b5a66 SY |
3344 | static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu, |
3345 | struct kvm_xsave *guest_xsave) | |
3346 | { | |
3347 | u64 xstate_bv = | |
3348 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)]; | |
a575813b | 3349 | u32 mxcsr = *(u32 *)&guest_xsave->region[XSAVE_MXCSR_OFFSET / sizeof(u32)]; |
2d5b5a66 | 3350 | |
d366bf7e | 3351 | if (boot_cpu_has(X86_FEATURE_XSAVE)) { |
d7876f1b PB |
3352 | /* |
3353 | * Here we allow setting states that are not present in | |
3354 | * CPUID leaf 0xD, index 0, EDX:EAX. This is for compatibility | |
3355 | * with old userspace. | |
3356 | */ | |
a575813b WL |
3357 | if (xstate_bv & ~kvm_supported_xcr0() || |
3358 | mxcsr & ~mxcsr_feature_mask) | |
d7876f1b | 3359 | return -EINVAL; |
df1daba7 | 3360 | load_xsave(vcpu, (u8 *)guest_xsave->region); |
d7876f1b | 3361 | } else { |
a575813b WL |
3362 | if (xstate_bv & ~XFEATURE_MASK_FPSSE || |
3363 | mxcsr & ~mxcsr_feature_mask) | |
2d5b5a66 | 3364 | return -EINVAL; |
7366ed77 | 3365 | memcpy(&vcpu->arch.guest_fpu.state.fxsave, |
c47ada30 | 3366 | guest_xsave->region, sizeof(struct fxregs_state)); |
2d5b5a66 SY |
3367 | } |
3368 | return 0; | |
3369 | } | |
3370 | ||
3371 | static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu, | |
3372 | struct kvm_xcrs *guest_xcrs) | |
3373 | { | |
d366bf7e | 3374 | if (!boot_cpu_has(X86_FEATURE_XSAVE)) { |
2d5b5a66 SY |
3375 | guest_xcrs->nr_xcrs = 0; |
3376 | return; | |
3377 | } | |
3378 | ||
3379 | guest_xcrs->nr_xcrs = 1; | |
3380 | guest_xcrs->flags = 0; | |
3381 | guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK; | |
3382 | guest_xcrs->xcrs[0].value = vcpu->arch.xcr0; | |
3383 | } | |
3384 | ||
3385 | static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu, | |
3386 | struct kvm_xcrs *guest_xcrs) | |
3387 | { | |
3388 | int i, r = 0; | |
3389 | ||
d366bf7e | 3390 | if (!boot_cpu_has(X86_FEATURE_XSAVE)) |
2d5b5a66 SY |
3391 | return -EINVAL; |
3392 | ||
3393 | if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags) | |
3394 | return -EINVAL; | |
3395 | ||
3396 | for (i = 0; i < guest_xcrs->nr_xcrs; i++) | |
3397 | /* Only support XCR0 currently */ | |
c67a04cb | 3398 | if (guest_xcrs->xcrs[i].xcr == XCR_XFEATURE_ENABLED_MASK) { |
2d5b5a66 | 3399 | r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK, |
c67a04cb | 3400 | guest_xcrs->xcrs[i].value); |
2d5b5a66 SY |
3401 | break; |
3402 | } | |
3403 | if (r) | |
3404 | r = -EINVAL; | |
3405 | return r; | |
3406 | } | |
3407 | ||
1c0b28c2 EM |
3408 | /* |
3409 | * kvm_set_guest_paused() indicates to the guest kernel that it has been | |
3410 | * stopped by the hypervisor. This function will be called from the host only. | |
3411 | * EINVAL is returned when the host attempts to set the flag for a guest that | |
3412 | * does not support pv clocks. | |
3413 | */ | |
3414 | static int kvm_set_guest_paused(struct kvm_vcpu *vcpu) | |
3415 | { | |
0b79459b | 3416 | if (!vcpu->arch.pv_time_enabled) |
1c0b28c2 | 3417 | return -EINVAL; |
51d59c6b | 3418 | vcpu->arch.pvclock_set_guest_stopped_request = true; |
1c0b28c2 EM |
3419 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
3420 | return 0; | |
3421 | } | |
3422 | ||
5c919412 AS |
3423 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
3424 | struct kvm_enable_cap *cap) | |
3425 | { | |
3426 | if (cap->flags) | |
3427 | return -EINVAL; | |
3428 | ||
3429 | switch (cap->cap) { | |
efc479e6 RK |
3430 | case KVM_CAP_HYPERV_SYNIC2: |
3431 | if (cap->args[0]) | |
3432 | return -EINVAL; | |
5c919412 | 3433 | case KVM_CAP_HYPERV_SYNIC: |
546d87e5 WL |
3434 | if (!irqchip_in_kernel(vcpu->kvm)) |
3435 | return -EINVAL; | |
efc479e6 RK |
3436 | return kvm_hv_activate_synic(vcpu, cap->cap == |
3437 | KVM_CAP_HYPERV_SYNIC2); | |
5c919412 AS |
3438 | default: |
3439 | return -EINVAL; | |
3440 | } | |
3441 | } | |
3442 | ||
313a3dc7 CO |
3443 | long kvm_arch_vcpu_ioctl(struct file *filp, |
3444 | unsigned int ioctl, unsigned long arg) | |
3445 | { | |
3446 | struct kvm_vcpu *vcpu = filp->private_data; | |
3447 | void __user *argp = (void __user *)arg; | |
3448 | int r; | |
d1ac91d8 AK |
3449 | union { |
3450 | struct kvm_lapic_state *lapic; | |
3451 | struct kvm_xsave *xsave; | |
3452 | struct kvm_xcrs *xcrs; | |
3453 | void *buffer; | |
3454 | } u; | |
3455 | ||
3456 | u.buffer = NULL; | |
313a3dc7 CO |
3457 | switch (ioctl) { |
3458 | case KVM_GET_LAPIC: { | |
2204ae3c | 3459 | r = -EINVAL; |
bce87cce | 3460 | if (!lapic_in_kernel(vcpu)) |
2204ae3c | 3461 | goto out; |
d1ac91d8 | 3462 | u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 3463 | |
b772ff36 | 3464 | r = -ENOMEM; |
d1ac91d8 | 3465 | if (!u.lapic) |
b772ff36 | 3466 | goto out; |
d1ac91d8 | 3467 | r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3468 | if (r) |
3469 | goto out; | |
3470 | r = -EFAULT; | |
d1ac91d8 | 3471 | if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
3472 | goto out; |
3473 | r = 0; | |
3474 | break; | |
3475 | } | |
3476 | case KVM_SET_LAPIC: { | |
2204ae3c | 3477 | r = -EINVAL; |
bce87cce | 3478 | if (!lapic_in_kernel(vcpu)) |
2204ae3c | 3479 | goto out; |
ff5c2c03 | 3480 | u.lapic = memdup_user(argp, sizeof(*u.lapic)); |
18595411 GC |
3481 | if (IS_ERR(u.lapic)) |
3482 | return PTR_ERR(u.lapic); | |
ff5c2c03 | 3483 | |
d1ac91d8 | 3484 | r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3485 | break; |
3486 | } | |
f77bc6a4 ZX |
3487 | case KVM_INTERRUPT: { |
3488 | struct kvm_interrupt irq; | |
3489 | ||
3490 | r = -EFAULT; | |
3491 | if (copy_from_user(&irq, argp, sizeof irq)) | |
3492 | goto out; | |
3493 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
f77bc6a4 ZX |
3494 | break; |
3495 | } | |
c4abb7c9 JK |
3496 | case KVM_NMI: { |
3497 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
c4abb7c9 JK |
3498 | break; |
3499 | } | |
f077825a PB |
3500 | case KVM_SMI: { |
3501 | r = kvm_vcpu_ioctl_smi(vcpu); | |
3502 | break; | |
3503 | } | |
313a3dc7 CO |
3504 | case KVM_SET_CPUID: { |
3505 | struct kvm_cpuid __user *cpuid_arg = argp; | |
3506 | struct kvm_cpuid cpuid; | |
3507 | ||
3508 | r = -EFAULT; | |
3509 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3510 | goto out; | |
3511 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
313a3dc7 CO |
3512 | break; |
3513 | } | |
07716717 DK |
3514 | case KVM_SET_CPUID2: { |
3515 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3516 | struct kvm_cpuid2 cpuid; | |
3517 | ||
3518 | r = -EFAULT; | |
3519 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3520 | goto out; | |
3521 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 3522 | cpuid_arg->entries); |
07716717 DK |
3523 | break; |
3524 | } | |
3525 | case KVM_GET_CPUID2: { | |
3526 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3527 | struct kvm_cpuid2 cpuid; | |
3528 | ||
3529 | r = -EFAULT; | |
3530 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3531 | goto out; | |
3532 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 3533 | cpuid_arg->entries); |
07716717 DK |
3534 | if (r) |
3535 | goto out; | |
3536 | r = -EFAULT; | |
3537 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
3538 | goto out; | |
3539 | r = 0; | |
3540 | break; | |
3541 | } | |
313a3dc7 | 3542 | case KVM_GET_MSRS: |
609e36d3 | 3543 | r = msr_io(vcpu, argp, do_get_msr, 1); |
313a3dc7 CO |
3544 | break; |
3545 | case KVM_SET_MSRS: | |
3546 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
3547 | break; | |
b209749f AK |
3548 | case KVM_TPR_ACCESS_REPORTING: { |
3549 | struct kvm_tpr_access_ctl tac; | |
3550 | ||
3551 | r = -EFAULT; | |
3552 | if (copy_from_user(&tac, argp, sizeof tac)) | |
3553 | goto out; | |
3554 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
3555 | if (r) | |
3556 | goto out; | |
3557 | r = -EFAULT; | |
3558 | if (copy_to_user(argp, &tac, sizeof tac)) | |
3559 | goto out; | |
3560 | r = 0; | |
3561 | break; | |
3562 | }; | |
b93463aa AK |
3563 | case KVM_SET_VAPIC_ADDR: { |
3564 | struct kvm_vapic_addr va; | |
7301d6ab | 3565 | int idx; |
b93463aa AK |
3566 | |
3567 | r = -EINVAL; | |
35754c98 | 3568 | if (!lapic_in_kernel(vcpu)) |
b93463aa AK |
3569 | goto out; |
3570 | r = -EFAULT; | |
3571 | if (copy_from_user(&va, argp, sizeof va)) | |
3572 | goto out; | |
7301d6ab | 3573 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
fda4e2e8 | 3574 | r = kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); |
7301d6ab | 3575 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b93463aa AK |
3576 | break; |
3577 | } | |
890ca9ae HY |
3578 | case KVM_X86_SETUP_MCE: { |
3579 | u64 mcg_cap; | |
3580 | ||
3581 | r = -EFAULT; | |
3582 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
3583 | goto out; | |
3584 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
3585 | break; | |
3586 | } | |
3587 | case KVM_X86_SET_MCE: { | |
3588 | struct kvm_x86_mce mce; | |
3589 | ||
3590 | r = -EFAULT; | |
3591 | if (copy_from_user(&mce, argp, sizeof mce)) | |
3592 | goto out; | |
3593 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
3594 | break; | |
3595 | } | |
3cfc3092 JK |
3596 | case KVM_GET_VCPU_EVENTS: { |
3597 | struct kvm_vcpu_events events; | |
3598 | ||
3599 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
3600 | ||
3601 | r = -EFAULT; | |
3602 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
3603 | break; | |
3604 | r = 0; | |
3605 | break; | |
3606 | } | |
3607 | case KVM_SET_VCPU_EVENTS: { | |
3608 | struct kvm_vcpu_events events; | |
3609 | ||
3610 | r = -EFAULT; | |
3611 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
3612 | break; | |
3613 | ||
3614 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
3615 | break; | |
3616 | } | |
a1efbe77 JK |
3617 | case KVM_GET_DEBUGREGS: { |
3618 | struct kvm_debugregs dbgregs; | |
3619 | ||
3620 | kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs); | |
3621 | ||
3622 | r = -EFAULT; | |
3623 | if (copy_to_user(argp, &dbgregs, | |
3624 | sizeof(struct kvm_debugregs))) | |
3625 | break; | |
3626 | r = 0; | |
3627 | break; | |
3628 | } | |
3629 | case KVM_SET_DEBUGREGS: { | |
3630 | struct kvm_debugregs dbgregs; | |
3631 | ||
3632 | r = -EFAULT; | |
3633 | if (copy_from_user(&dbgregs, argp, | |
3634 | sizeof(struct kvm_debugregs))) | |
3635 | break; | |
3636 | ||
3637 | r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs); | |
3638 | break; | |
3639 | } | |
2d5b5a66 | 3640 | case KVM_GET_XSAVE: { |
d1ac91d8 | 3641 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 3642 | r = -ENOMEM; |
d1ac91d8 | 3643 | if (!u.xsave) |
2d5b5a66 SY |
3644 | break; |
3645 | ||
d1ac91d8 | 3646 | kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3647 | |
3648 | r = -EFAULT; | |
d1ac91d8 | 3649 | if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
3650 | break; |
3651 | r = 0; | |
3652 | break; | |
3653 | } | |
3654 | case KVM_SET_XSAVE: { | |
ff5c2c03 | 3655 | u.xsave = memdup_user(argp, sizeof(*u.xsave)); |
18595411 GC |
3656 | if (IS_ERR(u.xsave)) |
3657 | return PTR_ERR(u.xsave); | |
2d5b5a66 | 3658 | |
d1ac91d8 | 3659 | r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3660 | break; |
3661 | } | |
3662 | case KVM_GET_XCRS: { | |
d1ac91d8 | 3663 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 3664 | r = -ENOMEM; |
d1ac91d8 | 3665 | if (!u.xcrs) |
2d5b5a66 SY |
3666 | break; |
3667 | ||
d1ac91d8 | 3668 | kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3669 | |
3670 | r = -EFAULT; | |
d1ac91d8 | 3671 | if (copy_to_user(argp, u.xcrs, |
2d5b5a66 SY |
3672 | sizeof(struct kvm_xcrs))) |
3673 | break; | |
3674 | r = 0; | |
3675 | break; | |
3676 | } | |
3677 | case KVM_SET_XCRS: { | |
ff5c2c03 | 3678 | u.xcrs = memdup_user(argp, sizeof(*u.xcrs)); |
18595411 GC |
3679 | if (IS_ERR(u.xcrs)) |
3680 | return PTR_ERR(u.xcrs); | |
2d5b5a66 | 3681 | |
d1ac91d8 | 3682 | r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3683 | break; |
3684 | } | |
92a1f12d JR |
3685 | case KVM_SET_TSC_KHZ: { |
3686 | u32 user_tsc_khz; | |
3687 | ||
3688 | r = -EINVAL; | |
92a1f12d JR |
3689 | user_tsc_khz = (u32)arg; |
3690 | ||
3691 | if (user_tsc_khz >= kvm_max_guest_tsc_khz) | |
3692 | goto out; | |
3693 | ||
cc578287 ZA |
3694 | if (user_tsc_khz == 0) |
3695 | user_tsc_khz = tsc_khz; | |
3696 | ||
381d585c HZ |
3697 | if (!kvm_set_tsc_khz(vcpu, user_tsc_khz)) |
3698 | r = 0; | |
92a1f12d | 3699 | |
92a1f12d JR |
3700 | goto out; |
3701 | } | |
3702 | case KVM_GET_TSC_KHZ: { | |
cc578287 | 3703 | r = vcpu->arch.virtual_tsc_khz; |
92a1f12d JR |
3704 | goto out; |
3705 | } | |
1c0b28c2 EM |
3706 | case KVM_KVMCLOCK_CTRL: { |
3707 | r = kvm_set_guest_paused(vcpu); | |
3708 | goto out; | |
3709 | } | |
5c919412 AS |
3710 | case KVM_ENABLE_CAP: { |
3711 | struct kvm_enable_cap cap; | |
3712 | ||
3713 | r = -EFAULT; | |
3714 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
3715 | goto out; | |
3716 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
3717 | break; | |
3718 | } | |
313a3dc7 CO |
3719 | default: |
3720 | r = -EINVAL; | |
3721 | } | |
3722 | out: | |
d1ac91d8 | 3723 | kfree(u.buffer); |
313a3dc7 CO |
3724 | return r; |
3725 | } | |
3726 | ||
5b1c1493 CO |
3727 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
3728 | { | |
3729 | return VM_FAULT_SIGBUS; | |
3730 | } | |
3731 | ||
1fe779f8 CO |
3732 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
3733 | { | |
3734 | int ret; | |
3735 | ||
3736 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
951179ce | 3737 | return -EINVAL; |
1fe779f8 CO |
3738 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); |
3739 | return ret; | |
3740 | } | |
3741 | ||
b927a3ce SY |
3742 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
3743 | u64 ident_addr) | |
3744 | { | |
3745 | kvm->arch.ept_identity_map_addr = ident_addr; | |
3746 | return 0; | |
3747 | } | |
3748 | ||
1fe779f8 CO |
3749 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
3750 | u32 kvm_nr_mmu_pages) | |
3751 | { | |
3752 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
3753 | return -EINVAL; | |
3754 | ||
79fac95e | 3755 | mutex_lock(&kvm->slots_lock); |
1fe779f8 CO |
3756 | |
3757 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 3758 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 3759 | |
79fac95e | 3760 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
3761 | return 0; |
3762 | } | |
3763 | ||
3764 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
3765 | { | |
39de71ec | 3766 | return kvm->arch.n_max_mmu_pages; |
1fe779f8 CO |
3767 | } |
3768 | ||
1fe779f8 CO |
3769 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
3770 | { | |
90bca052 | 3771 | struct kvm_pic *pic = kvm->arch.vpic; |
1fe779f8 CO |
3772 | int r; |
3773 | ||
3774 | r = 0; | |
3775 | switch (chip->chip_id) { | |
3776 | case KVM_IRQCHIP_PIC_MASTER: | |
90bca052 | 3777 | memcpy(&chip->chip.pic, &pic->pics[0], |
1fe779f8 CO |
3778 | sizeof(struct kvm_pic_state)); |
3779 | break; | |
3780 | case KVM_IRQCHIP_PIC_SLAVE: | |
90bca052 | 3781 | memcpy(&chip->chip.pic, &pic->pics[1], |
1fe779f8 CO |
3782 | sizeof(struct kvm_pic_state)); |
3783 | break; | |
3784 | case KVM_IRQCHIP_IOAPIC: | |
33392b49 | 3785 | kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3786 | break; |
3787 | default: | |
3788 | r = -EINVAL; | |
3789 | break; | |
3790 | } | |
3791 | return r; | |
3792 | } | |
3793 | ||
3794 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
3795 | { | |
90bca052 | 3796 | struct kvm_pic *pic = kvm->arch.vpic; |
1fe779f8 CO |
3797 | int r; |
3798 | ||
3799 | r = 0; | |
3800 | switch (chip->chip_id) { | |
3801 | case KVM_IRQCHIP_PIC_MASTER: | |
90bca052 DH |
3802 | spin_lock(&pic->lock); |
3803 | memcpy(&pic->pics[0], &chip->chip.pic, | |
1fe779f8 | 3804 | sizeof(struct kvm_pic_state)); |
90bca052 | 3805 | spin_unlock(&pic->lock); |
1fe779f8 CO |
3806 | break; |
3807 | case KVM_IRQCHIP_PIC_SLAVE: | |
90bca052 DH |
3808 | spin_lock(&pic->lock); |
3809 | memcpy(&pic->pics[1], &chip->chip.pic, | |
1fe779f8 | 3810 | sizeof(struct kvm_pic_state)); |
90bca052 | 3811 | spin_unlock(&pic->lock); |
1fe779f8 CO |
3812 | break; |
3813 | case KVM_IRQCHIP_IOAPIC: | |
33392b49 | 3814 | kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3815 | break; |
3816 | default: | |
3817 | r = -EINVAL; | |
3818 | break; | |
3819 | } | |
90bca052 | 3820 | kvm_pic_update_irq(pic); |
1fe779f8 CO |
3821 | return r; |
3822 | } | |
3823 | ||
e0f63cb9 SY |
3824 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
3825 | { | |
34f3941c RK |
3826 | struct kvm_kpit_state *kps = &kvm->arch.vpit->pit_state; |
3827 | ||
3828 | BUILD_BUG_ON(sizeof(*ps) != sizeof(kps->channels)); | |
3829 | ||
3830 | mutex_lock(&kps->lock); | |
3831 | memcpy(ps, &kps->channels, sizeof(*ps)); | |
3832 | mutex_unlock(&kps->lock); | |
2da29bcc | 3833 | return 0; |
e0f63cb9 SY |
3834 | } |
3835 | ||
3836 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
3837 | { | |
0185604c | 3838 | int i; |
09edea72 RK |
3839 | struct kvm_pit *pit = kvm->arch.vpit; |
3840 | ||
3841 | mutex_lock(&pit->pit_state.lock); | |
34f3941c | 3842 | memcpy(&pit->pit_state.channels, ps, sizeof(*ps)); |
0185604c | 3843 | for (i = 0; i < 3; i++) |
09edea72 RK |
3844 | kvm_pit_load_count(pit, i, ps->channels[i].count, 0); |
3845 | mutex_unlock(&pit->pit_state.lock); | |
2da29bcc | 3846 | return 0; |
e9f42757 BK |
3847 | } |
3848 | ||
3849 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3850 | { | |
e9f42757 BK |
3851 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
3852 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
3853 | sizeof(ps->channels)); | |
3854 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
3855 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
97e69aa6 | 3856 | memset(&ps->reserved, 0, sizeof(ps->reserved)); |
2da29bcc | 3857 | return 0; |
e9f42757 BK |
3858 | } |
3859 | ||
3860 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3861 | { | |
2da29bcc | 3862 | int start = 0; |
0185604c | 3863 | int i; |
e9f42757 | 3864 | u32 prev_legacy, cur_legacy; |
09edea72 RK |
3865 | struct kvm_pit *pit = kvm->arch.vpit; |
3866 | ||
3867 | mutex_lock(&pit->pit_state.lock); | |
3868 | prev_legacy = pit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
e9f42757 BK |
3869 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; |
3870 | if (!prev_legacy && cur_legacy) | |
3871 | start = 1; | |
09edea72 RK |
3872 | memcpy(&pit->pit_state.channels, &ps->channels, |
3873 | sizeof(pit->pit_state.channels)); | |
3874 | pit->pit_state.flags = ps->flags; | |
0185604c | 3875 | for (i = 0; i < 3; i++) |
09edea72 | 3876 | kvm_pit_load_count(pit, i, pit->pit_state.channels[i].count, |
e5e57e7a | 3877 | start && i == 0); |
09edea72 | 3878 | mutex_unlock(&pit->pit_state.lock); |
2da29bcc | 3879 | return 0; |
e0f63cb9 SY |
3880 | } |
3881 | ||
52d939a0 MT |
3882 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
3883 | struct kvm_reinject_control *control) | |
3884 | { | |
71474e2f RK |
3885 | struct kvm_pit *pit = kvm->arch.vpit; |
3886 | ||
3887 | if (!pit) | |
52d939a0 | 3888 | return -ENXIO; |
b39c90b6 | 3889 | |
71474e2f RK |
3890 | /* pit->pit_state.lock was overloaded to prevent userspace from getting |
3891 | * an inconsistent state after running multiple KVM_REINJECT_CONTROL | |
3892 | * ioctls in parallel. Use a separate lock if that ioctl isn't rare. | |
3893 | */ | |
3894 | mutex_lock(&pit->pit_state.lock); | |
3895 | kvm_pit_set_reinject(pit, control->pit_reinject); | |
3896 | mutex_unlock(&pit->pit_state.lock); | |
b39c90b6 | 3897 | |
52d939a0 MT |
3898 | return 0; |
3899 | } | |
3900 | ||
95d4c16c | 3901 | /** |
60c34612 TY |
3902 | * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot |
3903 | * @kvm: kvm instance | |
3904 | * @log: slot id and address to which we copy the log | |
95d4c16c | 3905 | * |
e108ff2f PB |
3906 | * Steps 1-4 below provide general overview of dirty page logging. See |
3907 | * kvm_get_dirty_log_protect() function description for additional details. | |
3908 | * | |
3909 | * We call kvm_get_dirty_log_protect() to handle steps 1-3, upon return we | |
3910 | * always flush the TLB (step 4) even if previous step failed and the dirty | |
3911 | * bitmap may be corrupt. Regardless of previous outcome the KVM logging API | |
3912 | * does not preclude user space subsequent dirty log read. Flushing TLB ensures | |
3913 | * writes will be marked dirty for next log read. | |
95d4c16c | 3914 | * |
60c34612 TY |
3915 | * 1. Take a snapshot of the bit and clear it if needed. |
3916 | * 2. Write protect the corresponding page. | |
e108ff2f PB |
3917 | * 3. Copy the snapshot to the userspace. |
3918 | * 4. Flush TLB's if needed. | |
5bb064dc | 3919 | */ |
60c34612 | 3920 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
5bb064dc | 3921 | { |
60c34612 | 3922 | bool is_dirty = false; |
e108ff2f | 3923 | int r; |
5bb064dc | 3924 | |
79fac95e | 3925 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 3926 | |
88178fd4 KH |
3927 | /* |
3928 | * Flush potentially hardware-cached dirty pages to dirty_bitmap. | |
3929 | */ | |
3930 | if (kvm_x86_ops->flush_log_dirty) | |
3931 | kvm_x86_ops->flush_log_dirty(kvm); | |
3932 | ||
e108ff2f | 3933 | r = kvm_get_dirty_log_protect(kvm, log, &is_dirty); |
198c74f4 XG |
3934 | |
3935 | /* | |
3936 | * All the TLBs can be flushed out of mmu lock, see the comments in | |
3937 | * kvm_mmu_slot_remove_write_access(). | |
3938 | */ | |
e108ff2f | 3939 | lockdep_assert_held(&kvm->slots_lock); |
198c74f4 XG |
3940 | if (is_dirty) |
3941 | kvm_flush_remote_tlbs(kvm); | |
3942 | ||
79fac95e | 3943 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
3944 | return r; |
3945 | } | |
3946 | ||
aa2fbe6d YZ |
3947 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, |
3948 | bool line_status) | |
23d43cf9 CD |
3949 | { |
3950 | if (!irqchip_in_kernel(kvm)) | |
3951 | return -ENXIO; | |
3952 | ||
3953 | irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, | |
aa2fbe6d YZ |
3954 | irq_event->irq, irq_event->level, |
3955 | line_status); | |
23d43cf9 CD |
3956 | return 0; |
3957 | } | |
3958 | ||
90de4a18 NA |
3959 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, |
3960 | struct kvm_enable_cap *cap) | |
3961 | { | |
3962 | int r; | |
3963 | ||
3964 | if (cap->flags) | |
3965 | return -EINVAL; | |
3966 | ||
3967 | switch (cap->cap) { | |
3968 | case KVM_CAP_DISABLE_QUIRKS: | |
3969 | kvm->arch.disabled_quirks = cap->args[0]; | |
3970 | r = 0; | |
3971 | break; | |
49df6397 SR |
3972 | case KVM_CAP_SPLIT_IRQCHIP: { |
3973 | mutex_lock(&kvm->lock); | |
b053b2ae SR |
3974 | r = -EINVAL; |
3975 | if (cap->args[0] > MAX_NR_RESERVED_IOAPIC_PINS) | |
3976 | goto split_irqchip_unlock; | |
49df6397 SR |
3977 | r = -EEXIST; |
3978 | if (irqchip_in_kernel(kvm)) | |
3979 | goto split_irqchip_unlock; | |
557abc40 | 3980 | if (kvm->created_vcpus) |
49df6397 SR |
3981 | goto split_irqchip_unlock; |
3982 | r = kvm_setup_empty_irq_routing(kvm); | |
5c0aea0e | 3983 | if (r) |
49df6397 SR |
3984 | goto split_irqchip_unlock; |
3985 | /* Pairs with irqchip_in_kernel. */ | |
3986 | smp_wmb(); | |
49776faf | 3987 | kvm->arch.irqchip_mode = KVM_IRQCHIP_SPLIT; |
b053b2ae | 3988 | kvm->arch.nr_reserved_ioapic_pins = cap->args[0]; |
49df6397 SR |
3989 | r = 0; |
3990 | split_irqchip_unlock: | |
3991 | mutex_unlock(&kvm->lock); | |
3992 | break; | |
3993 | } | |
37131313 RK |
3994 | case KVM_CAP_X2APIC_API: |
3995 | r = -EINVAL; | |
3996 | if (cap->args[0] & ~KVM_X2APIC_API_VALID_FLAGS) | |
3997 | break; | |
3998 | ||
3999 | if (cap->args[0] & KVM_X2APIC_API_USE_32BIT_IDS) | |
4000 | kvm->arch.x2apic_format = true; | |
c519265f RK |
4001 | if (cap->args[0] & KVM_X2APIC_API_DISABLE_BROADCAST_QUIRK) |
4002 | kvm->arch.x2apic_broadcast_quirk_disabled = true; | |
37131313 RK |
4003 | |
4004 | r = 0; | |
4005 | break; | |
90de4a18 NA |
4006 | default: |
4007 | r = -EINVAL; | |
4008 | break; | |
4009 | } | |
4010 | return r; | |
4011 | } | |
4012 | ||
1fe779f8 CO |
4013 | long kvm_arch_vm_ioctl(struct file *filp, |
4014 | unsigned int ioctl, unsigned long arg) | |
4015 | { | |
4016 | struct kvm *kvm = filp->private_data; | |
4017 | void __user *argp = (void __user *)arg; | |
367e1319 | 4018 | int r = -ENOTTY; |
f0d66275 DH |
4019 | /* |
4020 | * This union makes it completely explicit to gcc-3.x | |
4021 | * that these two variables' stack usage should be | |
4022 | * combined, not added together. | |
4023 | */ | |
4024 | union { | |
4025 | struct kvm_pit_state ps; | |
e9f42757 | 4026 | struct kvm_pit_state2 ps2; |
c5ff41ce | 4027 | struct kvm_pit_config pit_config; |
f0d66275 | 4028 | } u; |
1fe779f8 CO |
4029 | |
4030 | switch (ioctl) { | |
4031 | case KVM_SET_TSS_ADDR: | |
4032 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
1fe779f8 | 4033 | break; |
b927a3ce SY |
4034 | case KVM_SET_IDENTITY_MAP_ADDR: { |
4035 | u64 ident_addr; | |
4036 | ||
4037 | r = -EFAULT; | |
4038 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
4039 | goto out; | |
4040 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); | |
b927a3ce SY |
4041 | break; |
4042 | } | |
1fe779f8 CO |
4043 | case KVM_SET_NR_MMU_PAGES: |
4044 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
1fe779f8 CO |
4045 | break; |
4046 | case KVM_GET_NR_MMU_PAGES: | |
4047 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
4048 | break; | |
3ddea128 | 4049 | case KVM_CREATE_IRQCHIP: { |
3ddea128 | 4050 | mutex_lock(&kvm->lock); |
09941366 | 4051 | |
3ddea128 | 4052 | r = -EEXIST; |
35e6eaa3 | 4053 | if (irqchip_in_kernel(kvm)) |
3ddea128 | 4054 | goto create_irqchip_unlock; |
09941366 | 4055 | |
3e515705 | 4056 | r = -EINVAL; |
557abc40 | 4057 | if (kvm->created_vcpus) |
3e515705 | 4058 | goto create_irqchip_unlock; |
09941366 RK |
4059 | |
4060 | r = kvm_pic_init(kvm); | |
4061 | if (r) | |
3ddea128 | 4062 | goto create_irqchip_unlock; |
09941366 RK |
4063 | |
4064 | r = kvm_ioapic_init(kvm); | |
4065 | if (r) { | |
09941366 | 4066 | kvm_pic_destroy(kvm); |
3ddea128 | 4067 | goto create_irqchip_unlock; |
09941366 RK |
4068 | } |
4069 | ||
399ec807 AK |
4070 | r = kvm_setup_default_irq_routing(kvm); |
4071 | if (r) { | |
72bb2fcd | 4072 | kvm_ioapic_destroy(kvm); |
09941366 | 4073 | kvm_pic_destroy(kvm); |
71ba994c | 4074 | goto create_irqchip_unlock; |
399ec807 | 4075 | } |
49776faf | 4076 | /* Write kvm->irq_routing before enabling irqchip_in_kernel. */ |
71ba994c | 4077 | smp_wmb(); |
49776faf | 4078 | kvm->arch.irqchip_mode = KVM_IRQCHIP_KERNEL; |
3ddea128 MT |
4079 | create_irqchip_unlock: |
4080 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 4081 | break; |
3ddea128 | 4082 | } |
7837699f | 4083 | case KVM_CREATE_PIT: |
c5ff41ce JK |
4084 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
4085 | goto create_pit; | |
4086 | case KVM_CREATE_PIT2: | |
4087 | r = -EFAULT; | |
4088 | if (copy_from_user(&u.pit_config, argp, | |
4089 | sizeof(struct kvm_pit_config))) | |
4090 | goto out; | |
4091 | create_pit: | |
250715a6 | 4092 | mutex_lock(&kvm->lock); |
269e05e4 AK |
4093 | r = -EEXIST; |
4094 | if (kvm->arch.vpit) | |
4095 | goto create_pit_unlock; | |
7837699f | 4096 | r = -ENOMEM; |
c5ff41ce | 4097 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
4098 | if (kvm->arch.vpit) |
4099 | r = 0; | |
269e05e4 | 4100 | create_pit_unlock: |
250715a6 | 4101 | mutex_unlock(&kvm->lock); |
7837699f | 4102 | break; |
1fe779f8 CO |
4103 | case KVM_GET_IRQCHIP: { |
4104 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 4105 | struct kvm_irqchip *chip; |
1fe779f8 | 4106 | |
ff5c2c03 SL |
4107 | chip = memdup_user(argp, sizeof(*chip)); |
4108 | if (IS_ERR(chip)) { | |
4109 | r = PTR_ERR(chip); | |
1fe779f8 | 4110 | goto out; |
ff5c2c03 SL |
4111 | } |
4112 | ||
1fe779f8 | 4113 | r = -ENXIO; |
826da321 | 4114 | if (!irqchip_kernel(kvm)) |
f0d66275 DH |
4115 | goto get_irqchip_out; |
4116 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 4117 | if (r) |
f0d66275 | 4118 | goto get_irqchip_out; |
1fe779f8 | 4119 | r = -EFAULT; |
f0d66275 DH |
4120 | if (copy_to_user(argp, chip, sizeof *chip)) |
4121 | goto get_irqchip_out; | |
1fe779f8 | 4122 | r = 0; |
f0d66275 DH |
4123 | get_irqchip_out: |
4124 | kfree(chip); | |
1fe779f8 CO |
4125 | break; |
4126 | } | |
4127 | case KVM_SET_IRQCHIP: { | |
4128 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 4129 | struct kvm_irqchip *chip; |
1fe779f8 | 4130 | |
ff5c2c03 SL |
4131 | chip = memdup_user(argp, sizeof(*chip)); |
4132 | if (IS_ERR(chip)) { | |
4133 | r = PTR_ERR(chip); | |
1fe779f8 | 4134 | goto out; |
ff5c2c03 SL |
4135 | } |
4136 | ||
1fe779f8 | 4137 | r = -ENXIO; |
826da321 | 4138 | if (!irqchip_kernel(kvm)) |
f0d66275 DH |
4139 | goto set_irqchip_out; |
4140 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 4141 | if (r) |
f0d66275 | 4142 | goto set_irqchip_out; |
1fe779f8 | 4143 | r = 0; |
f0d66275 DH |
4144 | set_irqchip_out: |
4145 | kfree(chip); | |
1fe779f8 CO |
4146 | break; |
4147 | } | |
e0f63cb9 | 4148 | case KVM_GET_PIT: { |
e0f63cb9 | 4149 | r = -EFAULT; |
f0d66275 | 4150 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
4151 | goto out; |
4152 | r = -ENXIO; | |
4153 | if (!kvm->arch.vpit) | |
4154 | goto out; | |
f0d66275 | 4155 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
4156 | if (r) |
4157 | goto out; | |
4158 | r = -EFAULT; | |
f0d66275 | 4159 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
4160 | goto out; |
4161 | r = 0; | |
4162 | break; | |
4163 | } | |
4164 | case KVM_SET_PIT: { | |
e0f63cb9 | 4165 | r = -EFAULT; |
f0d66275 | 4166 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
4167 | goto out; |
4168 | r = -ENXIO; | |
4169 | if (!kvm->arch.vpit) | |
4170 | goto out; | |
f0d66275 | 4171 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
4172 | break; |
4173 | } | |
e9f42757 BK |
4174 | case KVM_GET_PIT2: { |
4175 | r = -ENXIO; | |
4176 | if (!kvm->arch.vpit) | |
4177 | goto out; | |
4178 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
4179 | if (r) | |
4180 | goto out; | |
4181 | r = -EFAULT; | |
4182 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
4183 | goto out; | |
4184 | r = 0; | |
4185 | break; | |
4186 | } | |
4187 | case KVM_SET_PIT2: { | |
4188 | r = -EFAULT; | |
4189 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
4190 | goto out; | |
4191 | r = -ENXIO; | |
4192 | if (!kvm->arch.vpit) | |
4193 | goto out; | |
4194 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
e9f42757 BK |
4195 | break; |
4196 | } | |
52d939a0 MT |
4197 | case KVM_REINJECT_CONTROL: { |
4198 | struct kvm_reinject_control control; | |
4199 | r = -EFAULT; | |
4200 | if (copy_from_user(&control, argp, sizeof(control))) | |
4201 | goto out; | |
4202 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
52d939a0 MT |
4203 | break; |
4204 | } | |
d71ba788 PB |
4205 | case KVM_SET_BOOT_CPU_ID: |
4206 | r = 0; | |
4207 | mutex_lock(&kvm->lock); | |
557abc40 | 4208 | if (kvm->created_vcpus) |
d71ba788 PB |
4209 | r = -EBUSY; |
4210 | else | |
4211 | kvm->arch.bsp_vcpu_id = arg; | |
4212 | mutex_unlock(&kvm->lock); | |
4213 | break; | |
ffde22ac ES |
4214 | case KVM_XEN_HVM_CONFIG: { |
4215 | r = -EFAULT; | |
4216 | if (copy_from_user(&kvm->arch.xen_hvm_config, argp, | |
4217 | sizeof(struct kvm_xen_hvm_config))) | |
4218 | goto out; | |
4219 | r = -EINVAL; | |
4220 | if (kvm->arch.xen_hvm_config.flags) | |
4221 | goto out; | |
4222 | r = 0; | |
4223 | break; | |
4224 | } | |
afbcf7ab | 4225 | case KVM_SET_CLOCK: { |
afbcf7ab GC |
4226 | struct kvm_clock_data user_ns; |
4227 | u64 now_ns; | |
afbcf7ab GC |
4228 | |
4229 | r = -EFAULT; | |
4230 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
4231 | goto out; | |
4232 | ||
4233 | r = -EINVAL; | |
4234 | if (user_ns.flags) | |
4235 | goto out; | |
4236 | ||
4237 | r = 0; | |
0bc48bea RK |
4238 | /* |
4239 | * TODO: userspace has to take care of races with VCPU_RUN, so | |
4240 | * kvm_gen_update_masterclock() can be cut down to locked | |
4241 | * pvclock_update_vm_gtod_copy(). | |
4242 | */ | |
4243 | kvm_gen_update_masterclock(kvm); | |
e891a32e | 4244 | now_ns = get_kvmclock_ns(kvm); |
108b249c | 4245 | kvm->arch.kvmclock_offset += user_ns.clock - now_ns; |
0bc48bea | 4246 | kvm_make_all_cpus_request(kvm, KVM_REQ_CLOCK_UPDATE); |
afbcf7ab GC |
4247 | break; |
4248 | } | |
4249 | case KVM_GET_CLOCK: { | |
afbcf7ab GC |
4250 | struct kvm_clock_data user_ns; |
4251 | u64 now_ns; | |
4252 | ||
e891a32e | 4253 | now_ns = get_kvmclock_ns(kvm); |
108b249c | 4254 | user_ns.clock = now_ns; |
e3fd9a93 | 4255 | user_ns.flags = kvm->arch.use_master_clock ? KVM_CLOCK_TSC_STABLE : 0; |
97e69aa6 | 4256 | memset(&user_ns.pad, 0, sizeof(user_ns.pad)); |
afbcf7ab GC |
4257 | |
4258 | r = -EFAULT; | |
4259 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
4260 | goto out; | |
4261 | r = 0; | |
4262 | break; | |
4263 | } | |
90de4a18 NA |
4264 | case KVM_ENABLE_CAP: { |
4265 | struct kvm_enable_cap cap; | |
afbcf7ab | 4266 | |
90de4a18 NA |
4267 | r = -EFAULT; |
4268 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
4269 | goto out; | |
4270 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
4271 | break; | |
4272 | } | |
1fe779f8 | 4273 | default: |
ad6260da | 4274 | r = -ENOTTY; |
1fe779f8 CO |
4275 | } |
4276 | out: | |
4277 | return r; | |
4278 | } | |
4279 | ||
a16b043c | 4280 | static void kvm_init_msr_list(void) |
043405e1 CO |
4281 | { |
4282 | u32 dummy[2]; | |
4283 | unsigned i, j; | |
4284 | ||
62ef68bb | 4285 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { |
043405e1 CO |
4286 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
4287 | continue; | |
93c4adc7 PB |
4288 | |
4289 | /* | |
4290 | * Even MSRs that are valid in the host may not be exposed | |
9dbe6cf9 | 4291 | * to the guests in some cases. |
93c4adc7 PB |
4292 | */ |
4293 | switch (msrs_to_save[i]) { | |
4294 | case MSR_IA32_BNDCFGS: | |
4295 | if (!kvm_x86_ops->mpx_supported()) | |
4296 | continue; | |
4297 | break; | |
9dbe6cf9 PB |
4298 | case MSR_TSC_AUX: |
4299 | if (!kvm_x86_ops->rdtscp_supported()) | |
4300 | continue; | |
4301 | break; | |
93c4adc7 PB |
4302 | default: |
4303 | break; | |
4304 | } | |
4305 | ||
043405e1 CO |
4306 | if (j < i) |
4307 | msrs_to_save[j] = msrs_to_save[i]; | |
4308 | j++; | |
4309 | } | |
4310 | num_msrs_to_save = j; | |
62ef68bb PB |
4311 | |
4312 | for (i = j = 0; i < ARRAY_SIZE(emulated_msrs); i++) { | |
4313 | switch (emulated_msrs[i]) { | |
6d396b55 PB |
4314 | case MSR_IA32_SMBASE: |
4315 | if (!kvm_x86_ops->cpu_has_high_real_mode_segbase()) | |
4316 | continue; | |
4317 | break; | |
62ef68bb PB |
4318 | default: |
4319 | break; | |
4320 | } | |
4321 | ||
4322 | if (j < i) | |
4323 | emulated_msrs[j] = emulated_msrs[i]; | |
4324 | j++; | |
4325 | } | |
4326 | num_emulated_msrs = j; | |
043405e1 CO |
4327 | } |
4328 | ||
bda9020e MT |
4329 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
4330 | const void *v) | |
bbd9b64e | 4331 | { |
70252a10 AK |
4332 | int handled = 0; |
4333 | int n; | |
4334 | ||
4335 | do { | |
4336 | n = min(len, 8); | |
bce87cce | 4337 | if (!(lapic_in_kernel(vcpu) && |
e32edf4f NN |
4338 | !kvm_iodevice_write(vcpu, &vcpu->arch.apic->dev, addr, n, v)) |
4339 | && kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, n, v)) | |
70252a10 AK |
4340 | break; |
4341 | handled += n; | |
4342 | addr += n; | |
4343 | len -= n; | |
4344 | v += n; | |
4345 | } while (len); | |
bbd9b64e | 4346 | |
70252a10 | 4347 | return handled; |
bbd9b64e CO |
4348 | } |
4349 | ||
bda9020e | 4350 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 4351 | { |
70252a10 AK |
4352 | int handled = 0; |
4353 | int n; | |
4354 | ||
4355 | do { | |
4356 | n = min(len, 8); | |
bce87cce | 4357 | if (!(lapic_in_kernel(vcpu) && |
e32edf4f NN |
4358 | !kvm_iodevice_read(vcpu, &vcpu->arch.apic->dev, |
4359 | addr, n, v)) | |
4360 | && kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, n, v)) | |
70252a10 AK |
4361 | break; |
4362 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, *(u64 *)v); | |
4363 | handled += n; | |
4364 | addr += n; | |
4365 | len -= n; | |
4366 | v += n; | |
4367 | } while (len); | |
bbd9b64e | 4368 | |
70252a10 | 4369 | return handled; |
bbd9b64e CO |
4370 | } |
4371 | ||
2dafc6c2 GN |
4372 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
4373 | struct kvm_segment *var, int seg) | |
4374 | { | |
4375 | kvm_x86_ops->set_segment(vcpu, var, seg); | |
4376 | } | |
4377 | ||
4378 | void kvm_get_segment(struct kvm_vcpu *vcpu, | |
4379 | struct kvm_segment *var, int seg) | |
4380 | { | |
4381 | kvm_x86_ops->get_segment(vcpu, var, seg); | |
4382 | } | |
4383 | ||
54987b7a PB |
4384 | gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, |
4385 | struct x86_exception *exception) | |
02f59dc9 JR |
4386 | { |
4387 | gpa_t t_gpa; | |
02f59dc9 JR |
4388 | |
4389 | BUG_ON(!mmu_is_nested(vcpu)); | |
4390 | ||
4391 | /* NPT walks are always user-walks */ | |
4392 | access |= PFERR_USER_MASK; | |
54987b7a | 4393 | t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, exception); |
02f59dc9 JR |
4394 | |
4395 | return t_gpa; | |
4396 | } | |
4397 | ||
ab9ae313 AK |
4398 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, |
4399 | struct x86_exception *exception) | |
1871c602 GN |
4400 | { |
4401 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
ab9ae313 | 4402 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4403 | } |
4404 | ||
ab9ae313 AK |
4405 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, |
4406 | struct x86_exception *exception) | |
1871c602 GN |
4407 | { |
4408 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
4409 | access |= PFERR_FETCH_MASK; | |
ab9ae313 | 4410 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4411 | } |
4412 | ||
ab9ae313 AK |
4413 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, |
4414 | struct x86_exception *exception) | |
1871c602 GN |
4415 | { |
4416 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
4417 | access |= PFERR_WRITE_MASK; | |
ab9ae313 | 4418 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4419 | } |
4420 | ||
4421 | /* uses this to access any guest's mapped memory without checking CPL */ | |
ab9ae313 AK |
4422 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, |
4423 | struct x86_exception *exception) | |
1871c602 | 4424 | { |
ab9ae313 | 4425 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception); |
1871c602 GN |
4426 | } |
4427 | ||
4428 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
4429 | struct kvm_vcpu *vcpu, u32 access, | |
bcc55cba | 4430 | struct x86_exception *exception) |
bbd9b64e CO |
4431 | { |
4432 | void *data = val; | |
10589a46 | 4433 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
4434 | |
4435 | while (bytes) { | |
14dfe855 | 4436 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access, |
ab9ae313 | 4437 | exception); |
bbd9b64e | 4438 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 4439 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
4440 | int ret; |
4441 | ||
bcc55cba | 4442 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4443 | return X86EMUL_PROPAGATE_FAULT; |
54bf36aa PB |
4444 | ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, data, |
4445 | offset, toread); | |
10589a46 | 4446 | if (ret < 0) { |
c3cd7ffa | 4447 | r = X86EMUL_IO_NEEDED; |
10589a46 MT |
4448 | goto out; |
4449 | } | |
bbd9b64e | 4450 | |
77c2002e IE |
4451 | bytes -= toread; |
4452 | data += toread; | |
4453 | addr += toread; | |
bbd9b64e | 4454 | } |
10589a46 | 4455 | out: |
10589a46 | 4456 | return r; |
bbd9b64e | 4457 | } |
77c2002e | 4458 | |
1871c602 | 4459 | /* used for instruction fetching */ |
0f65dd70 AK |
4460 | static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt, |
4461 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4462 | struct x86_exception *exception) |
1871c602 | 4463 | { |
0f65dd70 | 4464 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4465 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
44583cba PB |
4466 | unsigned offset; |
4467 | int ret; | |
0f65dd70 | 4468 | |
44583cba PB |
4469 | /* Inline kvm_read_guest_virt_helper for speed. */ |
4470 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access|PFERR_FETCH_MASK, | |
4471 | exception); | |
4472 | if (unlikely(gpa == UNMAPPED_GVA)) | |
4473 | return X86EMUL_PROPAGATE_FAULT; | |
4474 | ||
4475 | offset = addr & (PAGE_SIZE-1); | |
4476 | if (WARN_ON(offset + bytes > PAGE_SIZE)) | |
4477 | bytes = (unsigned)PAGE_SIZE - offset; | |
54bf36aa PB |
4478 | ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, val, |
4479 | offset, bytes); | |
44583cba PB |
4480 | if (unlikely(ret < 0)) |
4481 | return X86EMUL_IO_NEEDED; | |
4482 | ||
4483 | return X86EMUL_CONTINUE; | |
1871c602 GN |
4484 | } |
4485 | ||
064aea77 | 4486 | int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4487 | gva_t addr, void *val, unsigned int bytes, |
bcc55cba | 4488 | struct x86_exception *exception) |
1871c602 | 4489 | { |
0f65dd70 | 4490 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4491 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
0f65dd70 | 4492 | |
1871c602 | 4493 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, |
bcc55cba | 4494 | exception); |
1871c602 | 4495 | } |
064aea77 | 4496 | EXPORT_SYMBOL_GPL(kvm_read_guest_virt); |
1871c602 | 4497 | |
0f65dd70 AK |
4498 | static int kvm_read_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
4499 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4500 | struct x86_exception *exception) |
1871c602 | 4501 | { |
0f65dd70 | 4502 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
bcc55cba | 4503 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception); |
1871c602 GN |
4504 | } |
4505 | ||
7a036a6f RK |
4506 | static int kvm_read_guest_phys_system(struct x86_emulate_ctxt *ctxt, |
4507 | unsigned long addr, void *val, unsigned int bytes) | |
4508 | { | |
4509 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4510 | int r = kvm_vcpu_read_guest(vcpu, addr, val, bytes); | |
4511 | ||
4512 | return r < 0 ? X86EMUL_IO_NEEDED : X86EMUL_CONTINUE; | |
4513 | } | |
4514 | ||
6a4d7550 | 4515 | int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4516 | gva_t addr, void *val, |
2dafc6c2 | 4517 | unsigned int bytes, |
bcc55cba | 4518 | struct x86_exception *exception) |
77c2002e | 4519 | { |
0f65dd70 | 4520 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
77c2002e IE |
4521 | void *data = val; |
4522 | int r = X86EMUL_CONTINUE; | |
4523 | ||
4524 | while (bytes) { | |
14dfe855 JR |
4525 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, |
4526 | PFERR_WRITE_MASK, | |
ab9ae313 | 4527 | exception); |
77c2002e IE |
4528 | unsigned offset = addr & (PAGE_SIZE-1); |
4529 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
4530 | int ret; | |
4531 | ||
bcc55cba | 4532 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4533 | return X86EMUL_PROPAGATE_FAULT; |
54bf36aa | 4534 | ret = kvm_vcpu_write_guest(vcpu, gpa, data, towrite); |
77c2002e | 4535 | if (ret < 0) { |
c3cd7ffa | 4536 | r = X86EMUL_IO_NEEDED; |
77c2002e IE |
4537 | goto out; |
4538 | } | |
4539 | ||
4540 | bytes -= towrite; | |
4541 | data += towrite; | |
4542 | addr += towrite; | |
4543 | } | |
4544 | out: | |
4545 | return r; | |
4546 | } | |
6a4d7550 | 4547 | EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system); |
77c2002e | 4548 | |
0f89b207 TL |
4549 | static int vcpu_is_mmio_gpa(struct kvm_vcpu *vcpu, unsigned long gva, |
4550 | gpa_t gpa, bool write) | |
4551 | { | |
4552 | /* For APIC access vmexit */ | |
4553 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4554 | return 1; | |
4555 | ||
4556 | if (vcpu_match_mmio_gpa(vcpu, gpa)) { | |
4557 | trace_vcpu_match_mmio(gva, gpa, write, true); | |
4558 | return 1; | |
4559 | } | |
4560 | ||
4561 | return 0; | |
4562 | } | |
4563 | ||
af7cc7d1 XG |
4564 | static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva, |
4565 | gpa_t *gpa, struct x86_exception *exception, | |
4566 | bool write) | |
4567 | { | |
97d64b78 AK |
4568 | u32 access = ((kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0) |
4569 | | (write ? PFERR_WRITE_MASK : 0); | |
af7cc7d1 | 4570 | |
be94f6b7 HH |
4571 | /* |
4572 | * currently PKRU is only applied to ept enabled guest so | |
4573 | * there is no pkey in EPT page table for L1 guest or EPT | |
4574 | * shadow page table for L2 guest. | |
4575 | */ | |
97d64b78 | 4576 | if (vcpu_match_mmio_gva(vcpu, gva) |
97ec8c06 | 4577 | && !permission_fault(vcpu, vcpu->arch.walk_mmu, |
be94f6b7 | 4578 | vcpu->arch.access, 0, access)) { |
bebb106a XG |
4579 | *gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT | |
4580 | (gva & (PAGE_SIZE - 1)); | |
4f022648 | 4581 | trace_vcpu_match_mmio(gva, *gpa, write, false); |
bebb106a XG |
4582 | return 1; |
4583 | } | |
4584 | ||
af7cc7d1 XG |
4585 | *gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
4586 | ||
4587 | if (*gpa == UNMAPPED_GVA) | |
4588 | return -1; | |
4589 | ||
0f89b207 | 4590 | return vcpu_is_mmio_gpa(vcpu, gva, *gpa, write); |
af7cc7d1 XG |
4591 | } |
4592 | ||
3200f405 | 4593 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
bcc55cba | 4594 | const void *val, int bytes) |
bbd9b64e CO |
4595 | { |
4596 | int ret; | |
4597 | ||
54bf36aa | 4598 | ret = kvm_vcpu_write_guest(vcpu, gpa, val, bytes); |
9f811285 | 4599 | if (ret < 0) |
bbd9b64e | 4600 | return 0; |
0eb05bf2 | 4601 | kvm_page_track_write(vcpu, gpa, val, bytes); |
bbd9b64e CO |
4602 | return 1; |
4603 | } | |
4604 | ||
77d197b2 XG |
4605 | struct read_write_emulator_ops { |
4606 | int (*read_write_prepare)(struct kvm_vcpu *vcpu, void *val, | |
4607 | int bytes); | |
4608 | int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4609 | void *val, int bytes); | |
4610 | int (*read_write_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4611 | int bytes, void *val); | |
4612 | int (*read_write_exit_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4613 | void *val, int bytes); | |
4614 | bool write; | |
4615 | }; | |
4616 | ||
4617 | static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes) | |
4618 | { | |
4619 | if (vcpu->mmio_read_completed) { | |
77d197b2 | 4620 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
f78146b0 | 4621 | vcpu->mmio_fragments[0].gpa, *(u64 *)val); |
77d197b2 XG |
4622 | vcpu->mmio_read_completed = 0; |
4623 | return 1; | |
4624 | } | |
4625 | ||
4626 | return 0; | |
4627 | } | |
4628 | ||
4629 | static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4630 | void *val, int bytes) | |
4631 | { | |
54bf36aa | 4632 | return !kvm_vcpu_read_guest(vcpu, gpa, val, bytes); |
77d197b2 XG |
4633 | } |
4634 | ||
4635 | static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4636 | void *val, int bytes) | |
4637 | { | |
4638 | return emulator_write_phys(vcpu, gpa, val, bytes); | |
4639 | } | |
4640 | ||
4641 | static int write_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val) | |
4642 | { | |
4643 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); | |
4644 | return vcpu_mmio_write(vcpu, gpa, bytes, val); | |
4645 | } | |
4646 | ||
4647 | static int read_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4648 | void *val, int bytes) | |
4649 | { | |
4650 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
4651 | return X86EMUL_IO_NEEDED; | |
4652 | } | |
4653 | ||
4654 | static int write_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4655 | void *val, int bytes) | |
4656 | { | |
f78146b0 AK |
4657 | struct kvm_mmio_fragment *frag = &vcpu->mmio_fragments[0]; |
4658 | ||
87da7e66 | 4659 | memcpy(vcpu->run->mmio.data, frag->data, min(8u, frag->len)); |
77d197b2 XG |
4660 | return X86EMUL_CONTINUE; |
4661 | } | |
4662 | ||
0fbe9b0b | 4663 | static const struct read_write_emulator_ops read_emultor = { |
77d197b2 XG |
4664 | .read_write_prepare = read_prepare, |
4665 | .read_write_emulate = read_emulate, | |
4666 | .read_write_mmio = vcpu_mmio_read, | |
4667 | .read_write_exit_mmio = read_exit_mmio, | |
4668 | }; | |
4669 | ||
0fbe9b0b | 4670 | static const struct read_write_emulator_ops write_emultor = { |
77d197b2 XG |
4671 | .read_write_emulate = write_emulate, |
4672 | .read_write_mmio = write_mmio, | |
4673 | .read_write_exit_mmio = write_exit_mmio, | |
4674 | .write = true, | |
4675 | }; | |
4676 | ||
22388a3c XG |
4677 | static int emulator_read_write_onepage(unsigned long addr, void *val, |
4678 | unsigned int bytes, | |
4679 | struct x86_exception *exception, | |
4680 | struct kvm_vcpu *vcpu, | |
0fbe9b0b | 4681 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 4682 | { |
af7cc7d1 XG |
4683 | gpa_t gpa; |
4684 | int handled, ret; | |
22388a3c | 4685 | bool write = ops->write; |
f78146b0 | 4686 | struct kvm_mmio_fragment *frag; |
0f89b207 TL |
4687 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
4688 | ||
4689 | /* | |
4690 | * If the exit was due to a NPF we may already have a GPA. | |
4691 | * If the GPA is present, use it to avoid the GVA to GPA table walk. | |
4692 | * Note, this cannot be used on string operations since string | |
4693 | * operation using rep will only have the initial GPA from the NPF | |
4694 | * occurred. | |
4695 | */ | |
4696 | if (vcpu->arch.gpa_available && | |
4697 | emulator_can_use_gpa(ctxt) && | |
618232e2 BS |
4698 | (addr & ~PAGE_MASK) == (vcpu->arch.gpa_val & ~PAGE_MASK)) { |
4699 | gpa = vcpu->arch.gpa_val; | |
4700 | ret = vcpu_is_mmio_gpa(vcpu, addr, gpa, write); | |
4701 | } else { | |
4702 | ret = vcpu_mmio_gva_to_gpa(vcpu, addr, &gpa, exception, write); | |
4703 | if (ret < 0) | |
4704 | return X86EMUL_PROPAGATE_FAULT; | |
0f89b207 | 4705 | } |
10589a46 | 4706 | |
618232e2 | 4707 | if (!ret && ops->read_write_emulate(vcpu, gpa, val, bytes)) |
bbd9b64e CO |
4708 | return X86EMUL_CONTINUE; |
4709 | ||
bbd9b64e CO |
4710 | /* |
4711 | * Is this MMIO handled locally? | |
4712 | */ | |
22388a3c | 4713 | handled = ops->read_write_mmio(vcpu, gpa, bytes, val); |
70252a10 | 4714 | if (handled == bytes) |
bbd9b64e | 4715 | return X86EMUL_CONTINUE; |
bbd9b64e | 4716 | |
70252a10 AK |
4717 | gpa += handled; |
4718 | bytes -= handled; | |
4719 | val += handled; | |
4720 | ||
87da7e66 XG |
4721 | WARN_ON(vcpu->mmio_nr_fragments >= KVM_MAX_MMIO_FRAGMENTS); |
4722 | frag = &vcpu->mmio_fragments[vcpu->mmio_nr_fragments++]; | |
4723 | frag->gpa = gpa; | |
4724 | frag->data = val; | |
4725 | frag->len = bytes; | |
f78146b0 | 4726 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
4727 | } |
4728 | ||
52eb5a6d XL |
4729 | static int emulator_read_write(struct x86_emulate_ctxt *ctxt, |
4730 | unsigned long addr, | |
22388a3c XG |
4731 | void *val, unsigned int bytes, |
4732 | struct x86_exception *exception, | |
0fbe9b0b | 4733 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 4734 | { |
0f65dd70 | 4735 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
f78146b0 AK |
4736 | gpa_t gpa; |
4737 | int rc; | |
4738 | ||
4739 | if (ops->read_write_prepare && | |
4740 | ops->read_write_prepare(vcpu, val, bytes)) | |
4741 | return X86EMUL_CONTINUE; | |
4742 | ||
4743 | vcpu->mmio_nr_fragments = 0; | |
0f65dd70 | 4744 | |
bbd9b64e CO |
4745 | /* Crossing a page boundary? */ |
4746 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
f78146b0 | 4747 | int now; |
bbd9b64e CO |
4748 | |
4749 | now = -addr & ~PAGE_MASK; | |
22388a3c XG |
4750 | rc = emulator_read_write_onepage(addr, val, now, exception, |
4751 | vcpu, ops); | |
4752 | ||
bbd9b64e CO |
4753 | if (rc != X86EMUL_CONTINUE) |
4754 | return rc; | |
4755 | addr += now; | |
bac15531 NA |
4756 | if (ctxt->mode != X86EMUL_MODE_PROT64) |
4757 | addr = (u32)addr; | |
bbd9b64e CO |
4758 | val += now; |
4759 | bytes -= now; | |
4760 | } | |
22388a3c | 4761 | |
f78146b0 AK |
4762 | rc = emulator_read_write_onepage(addr, val, bytes, exception, |
4763 | vcpu, ops); | |
4764 | if (rc != X86EMUL_CONTINUE) | |
4765 | return rc; | |
4766 | ||
4767 | if (!vcpu->mmio_nr_fragments) | |
4768 | return rc; | |
4769 | ||
4770 | gpa = vcpu->mmio_fragments[0].gpa; | |
4771 | ||
4772 | vcpu->mmio_needed = 1; | |
4773 | vcpu->mmio_cur_fragment = 0; | |
4774 | ||
87da7e66 | 4775 | vcpu->run->mmio.len = min(8u, vcpu->mmio_fragments[0].len); |
f78146b0 AK |
4776 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = ops->write; |
4777 | vcpu->run->exit_reason = KVM_EXIT_MMIO; | |
4778 | vcpu->run->mmio.phys_addr = gpa; | |
4779 | ||
4780 | return ops->read_write_exit_mmio(vcpu, gpa, val, bytes); | |
22388a3c XG |
4781 | } |
4782 | ||
4783 | static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt, | |
4784 | unsigned long addr, | |
4785 | void *val, | |
4786 | unsigned int bytes, | |
4787 | struct x86_exception *exception) | |
4788 | { | |
4789 | return emulator_read_write(ctxt, addr, val, bytes, | |
4790 | exception, &read_emultor); | |
4791 | } | |
4792 | ||
52eb5a6d | 4793 | static int emulator_write_emulated(struct x86_emulate_ctxt *ctxt, |
22388a3c XG |
4794 | unsigned long addr, |
4795 | const void *val, | |
4796 | unsigned int bytes, | |
4797 | struct x86_exception *exception) | |
4798 | { | |
4799 | return emulator_read_write(ctxt, addr, (void *)val, bytes, | |
4800 | exception, &write_emultor); | |
bbd9b64e | 4801 | } |
bbd9b64e | 4802 | |
daea3e73 AK |
4803 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
4804 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) | |
4805 | ||
4806 | #ifdef CONFIG_X86_64 | |
4807 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) | |
4808 | #else | |
4809 | # define CMPXCHG64(ptr, old, new) \ | |
9749a6c0 | 4810 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
daea3e73 AK |
4811 | #endif |
4812 | ||
0f65dd70 AK |
4813 | static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, |
4814 | unsigned long addr, | |
bbd9b64e CO |
4815 | const void *old, |
4816 | const void *new, | |
4817 | unsigned int bytes, | |
0f65dd70 | 4818 | struct x86_exception *exception) |
bbd9b64e | 4819 | { |
0f65dd70 | 4820 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
daea3e73 AK |
4821 | gpa_t gpa; |
4822 | struct page *page; | |
4823 | char *kaddr; | |
4824 | bool exchanged; | |
2bacc55c | 4825 | |
daea3e73 AK |
4826 | /* guests cmpxchg8b have to be emulated atomically */ |
4827 | if (bytes > 8 || (bytes & (bytes - 1))) | |
4828 | goto emul_write; | |
10589a46 | 4829 | |
daea3e73 | 4830 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
2bacc55c | 4831 | |
daea3e73 AK |
4832 | if (gpa == UNMAPPED_GVA || |
4833 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4834 | goto emul_write; | |
2bacc55c | 4835 | |
daea3e73 AK |
4836 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
4837 | goto emul_write; | |
72dc67a6 | 4838 | |
54bf36aa | 4839 | page = kvm_vcpu_gfn_to_page(vcpu, gpa >> PAGE_SHIFT); |
32cad84f | 4840 | if (is_error_page(page)) |
c19b8bd6 | 4841 | goto emul_write; |
72dc67a6 | 4842 | |
8fd75e12 | 4843 | kaddr = kmap_atomic(page); |
daea3e73 AK |
4844 | kaddr += offset_in_page(gpa); |
4845 | switch (bytes) { | |
4846 | case 1: | |
4847 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); | |
4848 | break; | |
4849 | case 2: | |
4850 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); | |
4851 | break; | |
4852 | case 4: | |
4853 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); | |
4854 | break; | |
4855 | case 8: | |
4856 | exchanged = CMPXCHG64(kaddr, old, new); | |
4857 | break; | |
4858 | default: | |
4859 | BUG(); | |
2bacc55c | 4860 | } |
8fd75e12 | 4861 | kunmap_atomic(kaddr); |
daea3e73 AK |
4862 | kvm_release_page_dirty(page); |
4863 | ||
4864 | if (!exchanged) | |
4865 | return X86EMUL_CMPXCHG_FAILED; | |
4866 | ||
54bf36aa | 4867 | kvm_vcpu_mark_page_dirty(vcpu, gpa >> PAGE_SHIFT); |
0eb05bf2 | 4868 | kvm_page_track_write(vcpu, gpa, new, bytes); |
8f6abd06 GN |
4869 | |
4870 | return X86EMUL_CONTINUE; | |
4a5f48f6 | 4871 | |
3200f405 | 4872 | emul_write: |
daea3e73 | 4873 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c | 4874 | |
0f65dd70 | 4875 | return emulator_write_emulated(ctxt, addr, new, bytes, exception); |
bbd9b64e CO |
4876 | } |
4877 | ||
cf8f70bf GN |
4878 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
4879 | { | |
cbfc6c91 | 4880 | int r = 0, i; |
cf8f70bf | 4881 | |
cbfc6c91 WL |
4882 | for (i = 0; i < vcpu->arch.pio.count; i++) { |
4883 | if (vcpu->arch.pio.in) | |
4884 | r = kvm_io_bus_read(vcpu, KVM_PIO_BUS, vcpu->arch.pio.port, | |
4885 | vcpu->arch.pio.size, pd); | |
4886 | else | |
4887 | r = kvm_io_bus_write(vcpu, KVM_PIO_BUS, | |
4888 | vcpu->arch.pio.port, vcpu->arch.pio.size, | |
4889 | pd); | |
4890 | if (r) | |
4891 | break; | |
4892 | pd += vcpu->arch.pio.size; | |
4893 | } | |
cf8f70bf GN |
4894 | return r; |
4895 | } | |
4896 | ||
6f6fbe98 XG |
4897 | static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size, |
4898 | unsigned short port, void *val, | |
4899 | unsigned int count, bool in) | |
cf8f70bf | 4900 | { |
cf8f70bf | 4901 | vcpu->arch.pio.port = port; |
6f6fbe98 | 4902 | vcpu->arch.pio.in = in; |
7972995b | 4903 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
4904 | vcpu->arch.pio.size = size; |
4905 | ||
4906 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
7972995b | 4907 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4908 | return 1; |
4909 | } | |
4910 | ||
4911 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
6f6fbe98 | 4912 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; |
cf8f70bf GN |
4913 | vcpu->run->io.size = size; |
4914 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
4915 | vcpu->run->io.count = count; | |
4916 | vcpu->run->io.port = port; | |
4917 | ||
4918 | return 0; | |
4919 | } | |
4920 | ||
6f6fbe98 XG |
4921 | static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt, |
4922 | int size, unsigned short port, void *val, | |
4923 | unsigned int count) | |
cf8f70bf | 4924 | { |
ca1d4a9e | 4925 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
6f6fbe98 | 4926 | int ret; |
ca1d4a9e | 4927 | |
6f6fbe98 XG |
4928 | if (vcpu->arch.pio.count) |
4929 | goto data_avail; | |
cf8f70bf | 4930 | |
cbfc6c91 WL |
4931 | memset(vcpu->arch.pio_data, 0, size * count); |
4932 | ||
6f6fbe98 XG |
4933 | ret = emulator_pio_in_out(vcpu, size, port, val, count, true); |
4934 | if (ret) { | |
4935 | data_avail: | |
4936 | memcpy(val, vcpu->arch.pio_data, size * count); | |
1171903d | 4937 | trace_kvm_pio(KVM_PIO_IN, port, size, count, vcpu->arch.pio_data); |
7972995b | 4938 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4939 | return 1; |
4940 | } | |
4941 | ||
cf8f70bf GN |
4942 | return 0; |
4943 | } | |
4944 | ||
6f6fbe98 XG |
4945 | static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt, |
4946 | int size, unsigned short port, | |
4947 | const void *val, unsigned int count) | |
4948 | { | |
4949 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4950 | ||
4951 | memcpy(vcpu->arch.pio_data, val, size * count); | |
1171903d | 4952 | trace_kvm_pio(KVM_PIO_OUT, port, size, count, vcpu->arch.pio_data); |
6f6fbe98 XG |
4953 | return emulator_pio_in_out(vcpu, size, port, (void *)val, count, false); |
4954 | } | |
4955 | ||
bbd9b64e CO |
4956 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
4957 | { | |
4958 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
4959 | } | |
4960 | ||
3cb16fe7 | 4961 | static void emulator_invlpg(struct x86_emulate_ctxt *ctxt, ulong address) |
bbd9b64e | 4962 | { |
3cb16fe7 | 4963 | kvm_mmu_invlpg(emul_to_vcpu(ctxt), address); |
bbd9b64e CO |
4964 | } |
4965 | ||
ae6a2375 | 4966 | static int kvm_emulate_wbinvd_noskip(struct kvm_vcpu *vcpu) |
f5f48ee1 SY |
4967 | { |
4968 | if (!need_emulate_wbinvd(vcpu)) | |
4969 | return X86EMUL_CONTINUE; | |
4970 | ||
4971 | if (kvm_x86_ops->has_wbinvd_exit()) { | |
2eec7343 JK |
4972 | int cpu = get_cpu(); |
4973 | ||
4974 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
f5f48ee1 SY |
4975 | smp_call_function_many(vcpu->arch.wbinvd_dirty_mask, |
4976 | wbinvd_ipi, NULL, 1); | |
2eec7343 | 4977 | put_cpu(); |
f5f48ee1 | 4978 | cpumask_clear(vcpu->arch.wbinvd_dirty_mask); |
2eec7343 JK |
4979 | } else |
4980 | wbinvd(); | |
f5f48ee1 SY |
4981 | return X86EMUL_CONTINUE; |
4982 | } | |
5cb56059 JS |
4983 | |
4984 | int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
4985 | { | |
6affcbed KH |
4986 | kvm_emulate_wbinvd_noskip(vcpu); |
4987 | return kvm_skip_emulated_instruction(vcpu); | |
5cb56059 | 4988 | } |
f5f48ee1 SY |
4989 | EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd); |
4990 | ||
5cb56059 JS |
4991 | |
4992 | ||
bcaf5cc5 AK |
4993 | static void emulator_wbinvd(struct x86_emulate_ctxt *ctxt) |
4994 | { | |
5cb56059 | 4995 | kvm_emulate_wbinvd_noskip(emul_to_vcpu(ctxt)); |
bcaf5cc5 AK |
4996 | } |
4997 | ||
52eb5a6d XL |
4998 | static int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, |
4999 | unsigned long *dest) | |
bbd9b64e | 5000 | { |
16f8a6f9 | 5001 | return kvm_get_dr(emul_to_vcpu(ctxt), dr, dest); |
bbd9b64e CO |
5002 | } |
5003 | ||
52eb5a6d XL |
5004 | static int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, |
5005 | unsigned long value) | |
bbd9b64e | 5006 | { |
338dbc97 | 5007 | |
717746e3 | 5008 | return __kvm_set_dr(emul_to_vcpu(ctxt), dr, value); |
bbd9b64e CO |
5009 | } |
5010 | ||
52a46617 | 5011 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
5fdbf976 | 5012 | { |
52a46617 | 5013 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
5fdbf976 MT |
5014 | } |
5015 | ||
717746e3 | 5016 | static unsigned long emulator_get_cr(struct x86_emulate_ctxt *ctxt, int cr) |
bbd9b64e | 5017 | { |
717746e3 | 5018 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
52a46617 GN |
5019 | unsigned long value; |
5020 | ||
5021 | switch (cr) { | |
5022 | case 0: | |
5023 | value = kvm_read_cr0(vcpu); | |
5024 | break; | |
5025 | case 2: | |
5026 | value = vcpu->arch.cr2; | |
5027 | break; | |
5028 | case 3: | |
9f8fe504 | 5029 | value = kvm_read_cr3(vcpu); |
52a46617 GN |
5030 | break; |
5031 | case 4: | |
5032 | value = kvm_read_cr4(vcpu); | |
5033 | break; | |
5034 | case 8: | |
5035 | value = kvm_get_cr8(vcpu); | |
5036 | break; | |
5037 | default: | |
a737f256 | 5038 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
52a46617 GN |
5039 | return 0; |
5040 | } | |
5041 | ||
5042 | return value; | |
5043 | } | |
5044 | ||
717746e3 | 5045 | static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val) |
52a46617 | 5046 | { |
717746e3 | 5047 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
0f12244f GN |
5048 | int res = 0; |
5049 | ||
52a46617 GN |
5050 | switch (cr) { |
5051 | case 0: | |
49a9b07e | 5052 | res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
52a46617 GN |
5053 | break; |
5054 | case 2: | |
5055 | vcpu->arch.cr2 = val; | |
5056 | break; | |
5057 | case 3: | |
2390218b | 5058 | res = kvm_set_cr3(vcpu, val); |
52a46617 GN |
5059 | break; |
5060 | case 4: | |
a83b29c6 | 5061 | res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
52a46617 GN |
5062 | break; |
5063 | case 8: | |
eea1cff9 | 5064 | res = kvm_set_cr8(vcpu, val); |
52a46617 GN |
5065 | break; |
5066 | default: | |
a737f256 | 5067 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
0f12244f | 5068 | res = -1; |
52a46617 | 5069 | } |
0f12244f GN |
5070 | |
5071 | return res; | |
52a46617 GN |
5072 | } |
5073 | ||
717746e3 | 5074 | static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt) |
9c537244 | 5075 | { |
717746e3 | 5076 | return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt)); |
9c537244 GN |
5077 | } |
5078 | ||
4bff1e86 | 5079 | static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
2dafc6c2 | 5080 | { |
4bff1e86 | 5081 | kvm_x86_ops->get_gdt(emul_to_vcpu(ctxt), dt); |
2dafc6c2 GN |
5082 | } |
5083 | ||
4bff1e86 | 5084 | static void emulator_get_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
160ce1f1 | 5085 | { |
4bff1e86 | 5086 | kvm_x86_ops->get_idt(emul_to_vcpu(ctxt), dt); |
160ce1f1 MG |
5087 | } |
5088 | ||
1ac9d0cf AK |
5089 | static void emulator_set_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
5090 | { | |
5091 | kvm_x86_ops->set_gdt(emul_to_vcpu(ctxt), dt); | |
5092 | } | |
5093 | ||
5094 | static void emulator_set_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) | |
5095 | { | |
5096 | kvm_x86_ops->set_idt(emul_to_vcpu(ctxt), dt); | |
5097 | } | |
5098 | ||
4bff1e86 AK |
5099 | static unsigned long emulator_get_cached_segment_base( |
5100 | struct x86_emulate_ctxt *ctxt, int seg) | |
5951c442 | 5101 | { |
4bff1e86 | 5102 | return get_segment_base(emul_to_vcpu(ctxt), seg); |
5951c442 GN |
5103 | } |
5104 | ||
1aa36616 AK |
5105 | static bool emulator_get_segment(struct x86_emulate_ctxt *ctxt, u16 *selector, |
5106 | struct desc_struct *desc, u32 *base3, | |
5107 | int seg) | |
2dafc6c2 GN |
5108 | { |
5109 | struct kvm_segment var; | |
5110 | ||
4bff1e86 | 5111 | kvm_get_segment(emul_to_vcpu(ctxt), &var, seg); |
1aa36616 | 5112 | *selector = var.selector; |
2dafc6c2 | 5113 | |
378a8b09 GN |
5114 | if (var.unusable) { |
5115 | memset(desc, 0, sizeof(*desc)); | |
f0367ee1 RK |
5116 | if (base3) |
5117 | *base3 = 0; | |
2dafc6c2 | 5118 | return false; |
378a8b09 | 5119 | } |
2dafc6c2 GN |
5120 | |
5121 | if (var.g) | |
5122 | var.limit >>= 12; | |
5123 | set_desc_limit(desc, var.limit); | |
5124 | set_desc_base(desc, (unsigned long)var.base); | |
5601d05b GN |
5125 | #ifdef CONFIG_X86_64 |
5126 | if (base3) | |
5127 | *base3 = var.base >> 32; | |
5128 | #endif | |
2dafc6c2 GN |
5129 | desc->type = var.type; |
5130 | desc->s = var.s; | |
5131 | desc->dpl = var.dpl; | |
5132 | desc->p = var.present; | |
5133 | desc->avl = var.avl; | |
5134 | desc->l = var.l; | |
5135 | desc->d = var.db; | |
5136 | desc->g = var.g; | |
5137 | ||
5138 | return true; | |
5139 | } | |
5140 | ||
1aa36616 AK |
5141 | static void emulator_set_segment(struct x86_emulate_ctxt *ctxt, u16 selector, |
5142 | struct desc_struct *desc, u32 base3, | |
5143 | int seg) | |
2dafc6c2 | 5144 | { |
4bff1e86 | 5145 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
2dafc6c2 GN |
5146 | struct kvm_segment var; |
5147 | ||
1aa36616 | 5148 | var.selector = selector; |
2dafc6c2 | 5149 | var.base = get_desc_base(desc); |
5601d05b GN |
5150 | #ifdef CONFIG_X86_64 |
5151 | var.base |= ((u64)base3) << 32; | |
5152 | #endif | |
2dafc6c2 GN |
5153 | var.limit = get_desc_limit(desc); |
5154 | if (desc->g) | |
5155 | var.limit = (var.limit << 12) | 0xfff; | |
5156 | var.type = desc->type; | |
2dafc6c2 GN |
5157 | var.dpl = desc->dpl; |
5158 | var.db = desc->d; | |
5159 | var.s = desc->s; | |
5160 | var.l = desc->l; | |
5161 | var.g = desc->g; | |
5162 | var.avl = desc->avl; | |
5163 | var.present = desc->p; | |
5164 | var.unusable = !var.present; | |
5165 | var.padding = 0; | |
5166 | ||
5167 | kvm_set_segment(vcpu, &var, seg); | |
5168 | return; | |
5169 | } | |
5170 | ||
717746e3 AK |
5171 | static int emulator_get_msr(struct x86_emulate_ctxt *ctxt, |
5172 | u32 msr_index, u64 *pdata) | |
5173 | { | |
609e36d3 PB |
5174 | struct msr_data msr; |
5175 | int r; | |
5176 | ||
5177 | msr.index = msr_index; | |
5178 | msr.host_initiated = false; | |
5179 | r = kvm_get_msr(emul_to_vcpu(ctxt), &msr); | |
5180 | if (r) | |
5181 | return r; | |
5182 | ||
5183 | *pdata = msr.data; | |
5184 | return 0; | |
717746e3 AK |
5185 | } |
5186 | ||
5187 | static int emulator_set_msr(struct x86_emulate_ctxt *ctxt, | |
5188 | u32 msr_index, u64 data) | |
5189 | { | |
8fe8ab46 WA |
5190 | struct msr_data msr; |
5191 | ||
5192 | msr.data = data; | |
5193 | msr.index = msr_index; | |
5194 | msr.host_initiated = false; | |
5195 | return kvm_set_msr(emul_to_vcpu(ctxt), &msr); | |
717746e3 AK |
5196 | } |
5197 | ||
64d60670 PB |
5198 | static u64 emulator_get_smbase(struct x86_emulate_ctxt *ctxt) |
5199 | { | |
5200 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5201 | ||
5202 | return vcpu->arch.smbase; | |
5203 | } | |
5204 | ||
5205 | static void emulator_set_smbase(struct x86_emulate_ctxt *ctxt, u64 smbase) | |
5206 | { | |
5207 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5208 | ||
5209 | vcpu->arch.smbase = smbase; | |
5210 | } | |
5211 | ||
67f4d428 NA |
5212 | static int emulator_check_pmc(struct x86_emulate_ctxt *ctxt, |
5213 | u32 pmc) | |
5214 | { | |
c6702c9d | 5215 | return kvm_pmu_is_valid_msr_idx(emul_to_vcpu(ctxt), pmc); |
67f4d428 NA |
5216 | } |
5217 | ||
222d21aa AK |
5218 | static int emulator_read_pmc(struct x86_emulate_ctxt *ctxt, |
5219 | u32 pmc, u64 *pdata) | |
5220 | { | |
c6702c9d | 5221 | return kvm_pmu_rdpmc(emul_to_vcpu(ctxt), pmc, pdata); |
222d21aa AK |
5222 | } |
5223 | ||
6c3287f7 AK |
5224 | static void emulator_halt(struct x86_emulate_ctxt *ctxt) |
5225 | { | |
5226 | emul_to_vcpu(ctxt)->arch.halt_request = 1; | |
5227 | } | |
5228 | ||
5037f6f3 AK |
5229 | static void emulator_get_fpu(struct x86_emulate_ctxt *ctxt) |
5230 | { | |
5231 | preempt_disable(); | |
5197b808 | 5232 | kvm_load_guest_fpu(emul_to_vcpu(ctxt)); |
5037f6f3 AK |
5233 | } |
5234 | ||
5235 | static void emulator_put_fpu(struct x86_emulate_ctxt *ctxt) | |
5236 | { | |
5237 | preempt_enable(); | |
5238 | } | |
5239 | ||
2953538e | 5240 | static int emulator_intercept(struct x86_emulate_ctxt *ctxt, |
8a76d7f2 | 5241 | struct x86_instruction_info *info, |
c4f035c6 AK |
5242 | enum x86_intercept_stage stage) |
5243 | { | |
2953538e | 5244 | return kvm_x86_ops->check_intercept(emul_to_vcpu(ctxt), info, stage); |
c4f035c6 AK |
5245 | } |
5246 | ||
e911eb3b YZ |
5247 | static bool emulator_get_cpuid(struct x86_emulate_ctxt *ctxt, |
5248 | u32 *eax, u32 *ebx, u32 *ecx, u32 *edx, bool check_limit) | |
bdb42f5a | 5249 | { |
e911eb3b | 5250 | return kvm_cpuid(emul_to_vcpu(ctxt), eax, ebx, ecx, edx, check_limit); |
bdb42f5a SB |
5251 | } |
5252 | ||
dd856efa AK |
5253 | static ulong emulator_read_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg) |
5254 | { | |
5255 | return kvm_register_read(emul_to_vcpu(ctxt), reg); | |
5256 | } | |
5257 | ||
5258 | static void emulator_write_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg, ulong val) | |
5259 | { | |
5260 | kvm_register_write(emul_to_vcpu(ctxt), reg, val); | |
5261 | } | |
5262 | ||
801806d9 NA |
5263 | static void emulator_set_nmi_mask(struct x86_emulate_ctxt *ctxt, bool masked) |
5264 | { | |
5265 | kvm_x86_ops->set_nmi_mask(emul_to_vcpu(ctxt), masked); | |
5266 | } | |
5267 | ||
6ed071f0 LP |
5268 | static unsigned emulator_get_hflags(struct x86_emulate_ctxt *ctxt) |
5269 | { | |
5270 | return emul_to_vcpu(ctxt)->arch.hflags; | |
5271 | } | |
5272 | ||
5273 | static void emulator_set_hflags(struct x86_emulate_ctxt *ctxt, unsigned emul_flags) | |
5274 | { | |
5275 | kvm_set_hflags(emul_to_vcpu(ctxt), emul_flags); | |
5276 | } | |
5277 | ||
0225fb50 | 5278 | static const struct x86_emulate_ops emulate_ops = { |
dd856efa AK |
5279 | .read_gpr = emulator_read_gpr, |
5280 | .write_gpr = emulator_write_gpr, | |
1871c602 | 5281 | .read_std = kvm_read_guest_virt_system, |
2dafc6c2 | 5282 | .write_std = kvm_write_guest_virt_system, |
7a036a6f | 5283 | .read_phys = kvm_read_guest_phys_system, |
1871c602 | 5284 | .fetch = kvm_fetch_guest_virt, |
bbd9b64e CO |
5285 | .read_emulated = emulator_read_emulated, |
5286 | .write_emulated = emulator_write_emulated, | |
5287 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
3cb16fe7 | 5288 | .invlpg = emulator_invlpg, |
cf8f70bf GN |
5289 | .pio_in_emulated = emulator_pio_in_emulated, |
5290 | .pio_out_emulated = emulator_pio_out_emulated, | |
1aa36616 AK |
5291 | .get_segment = emulator_get_segment, |
5292 | .set_segment = emulator_set_segment, | |
5951c442 | 5293 | .get_cached_segment_base = emulator_get_cached_segment_base, |
2dafc6c2 | 5294 | .get_gdt = emulator_get_gdt, |
160ce1f1 | 5295 | .get_idt = emulator_get_idt, |
1ac9d0cf AK |
5296 | .set_gdt = emulator_set_gdt, |
5297 | .set_idt = emulator_set_idt, | |
52a46617 GN |
5298 | .get_cr = emulator_get_cr, |
5299 | .set_cr = emulator_set_cr, | |
9c537244 | 5300 | .cpl = emulator_get_cpl, |
35aa5375 GN |
5301 | .get_dr = emulator_get_dr, |
5302 | .set_dr = emulator_set_dr, | |
64d60670 PB |
5303 | .get_smbase = emulator_get_smbase, |
5304 | .set_smbase = emulator_set_smbase, | |
717746e3 AK |
5305 | .set_msr = emulator_set_msr, |
5306 | .get_msr = emulator_get_msr, | |
67f4d428 | 5307 | .check_pmc = emulator_check_pmc, |
222d21aa | 5308 | .read_pmc = emulator_read_pmc, |
6c3287f7 | 5309 | .halt = emulator_halt, |
bcaf5cc5 | 5310 | .wbinvd = emulator_wbinvd, |
d6aa1000 | 5311 | .fix_hypercall = emulator_fix_hypercall, |
5037f6f3 AK |
5312 | .get_fpu = emulator_get_fpu, |
5313 | .put_fpu = emulator_put_fpu, | |
c4f035c6 | 5314 | .intercept = emulator_intercept, |
bdb42f5a | 5315 | .get_cpuid = emulator_get_cpuid, |
801806d9 | 5316 | .set_nmi_mask = emulator_set_nmi_mask, |
6ed071f0 LP |
5317 | .get_hflags = emulator_get_hflags, |
5318 | .set_hflags = emulator_set_hflags, | |
bbd9b64e CO |
5319 | }; |
5320 | ||
95cb2295 GN |
5321 | static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |
5322 | { | |
37ccdcbe | 5323 | u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu); |
95cb2295 GN |
5324 | /* |
5325 | * an sti; sti; sequence only disable interrupts for the first | |
5326 | * instruction. So, if the last instruction, be it emulated or | |
5327 | * not, left the system with the INT_STI flag enabled, it | |
5328 | * means that the last instruction is an sti. We should not | |
5329 | * leave the flag on in this case. The same goes for mov ss | |
5330 | */ | |
37ccdcbe PB |
5331 | if (int_shadow & mask) |
5332 | mask = 0; | |
6addfc42 | 5333 | if (unlikely(int_shadow || mask)) { |
95cb2295 | 5334 | kvm_x86_ops->set_interrupt_shadow(vcpu, mask); |
6addfc42 PB |
5335 | if (!mask) |
5336 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
5337 | } | |
95cb2295 GN |
5338 | } |
5339 | ||
ef54bcfe | 5340 | static bool inject_emulated_exception(struct kvm_vcpu *vcpu) |
54b8486f GN |
5341 | { |
5342 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; | |
da9cb575 | 5343 | if (ctxt->exception.vector == PF_VECTOR) |
ef54bcfe PB |
5344 | return kvm_propagate_fault(vcpu, &ctxt->exception); |
5345 | ||
5346 | if (ctxt->exception.error_code_valid) | |
da9cb575 AK |
5347 | kvm_queue_exception_e(vcpu, ctxt->exception.vector, |
5348 | ctxt->exception.error_code); | |
54b8486f | 5349 | else |
da9cb575 | 5350 | kvm_queue_exception(vcpu, ctxt->exception.vector); |
ef54bcfe | 5351 | return false; |
54b8486f GN |
5352 | } |
5353 | ||
8ec4722d MG |
5354 | static void init_emulate_ctxt(struct kvm_vcpu *vcpu) |
5355 | { | |
adf52235 | 5356 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d MG |
5357 | int cs_db, cs_l; |
5358 | ||
8ec4722d MG |
5359 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
5360 | ||
adf52235 | 5361 | ctxt->eflags = kvm_get_rflags(vcpu); |
c8401dda PB |
5362 | ctxt->tf = (ctxt->eflags & X86_EFLAGS_TF) != 0; |
5363 | ||
adf52235 TY |
5364 | ctxt->eip = kvm_rip_read(vcpu); |
5365 | ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : | |
5366 | (ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 : | |
42bf549f | 5367 | (cs_l && is_long_mode(vcpu)) ? X86EMUL_MODE_PROT64 : |
adf52235 TY |
5368 | cs_db ? X86EMUL_MODE_PROT32 : |
5369 | X86EMUL_MODE_PROT16; | |
a584539b | 5370 | BUILD_BUG_ON(HF_GUEST_MASK != X86EMUL_GUEST_MASK); |
64d60670 PB |
5371 | BUILD_BUG_ON(HF_SMM_MASK != X86EMUL_SMM_MASK); |
5372 | BUILD_BUG_ON(HF_SMM_INSIDE_NMI_MASK != X86EMUL_SMM_INSIDE_NMI_MASK); | |
adf52235 | 5373 | |
dd856efa | 5374 | init_decode_cache(ctxt); |
7ae441ea | 5375 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; |
8ec4722d MG |
5376 | } |
5377 | ||
71f9833b | 5378 | int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip) |
63995653 | 5379 | { |
9d74191a | 5380 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
63995653 MG |
5381 | int ret; |
5382 | ||
5383 | init_emulate_ctxt(vcpu); | |
5384 | ||
9dac77fa AK |
5385 | ctxt->op_bytes = 2; |
5386 | ctxt->ad_bytes = 2; | |
5387 | ctxt->_eip = ctxt->eip + inc_eip; | |
9d74191a | 5388 | ret = emulate_int_real(ctxt, irq); |
63995653 MG |
5389 | |
5390 | if (ret != X86EMUL_CONTINUE) | |
5391 | return EMULATE_FAIL; | |
5392 | ||
9dac77fa | 5393 | ctxt->eip = ctxt->_eip; |
9d74191a TY |
5394 | kvm_rip_write(vcpu, ctxt->eip); |
5395 | kvm_set_rflags(vcpu, ctxt->eflags); | |
63995653 MG |
5396 | |
5397 | if (irq == NMI_VECTOR) | |
7460fb4a | 5398 | vcpu->arch.nmi_pending = 0; |
63995653 MG |
5399 | else |
5400 | vcpu->arch.interrupt.pending = false; | |
5401 | ||
5402 | return EMULATE_DONE; | |
5403 | } | |
5404 | EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt); | |
5405 | ||
6d77dbfc GN |
5406 | static int handle_emulation_failure(struct kvm_vcpu *vcpu) |
5407 | { | |
fc3a9157 JR |
5408 | int r = EMULATE_DONE; |
5409 | ||
6d77dbfc GN |
5410 | ++vcpu->stat.insn_emulation_fail; |
5411 | trace_kvm_emulate_insn_failed(vcpu); | |
a2b9e6c1 | 5412 | if (!is_guest_mode(vcpu) && kvm_x86_ops->get_cpl(vcpu) == 0) { |
fc3a9157 JR |
5413 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
5414 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
5415 | vcpu->run->internal.ndata = 0; | |
5416 | r = EMULATE_FAIL; | |
5417 | } | |
6d77dbfc | 5418 | kvm_queue_exception(vcpu, UD_VECTOR); |
fc3a9157 JR |
5419 | |
5420 | return r; | |
6d77dbfc GN |
5421 | } |
5422 | ||
93c05d3e | 5423 | static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2, |
991eebf9 GN |
5424 | bool write_fault_to_shadow_pgtable, |
5425 | int emulation_type) | |
a6f177ef | 5426 | { |
95b3cf69 | 5427 | gpa_t gpa = cr2; |
ba049e93 | 5428 | kvm_pfn_t pfn; |
a6f177ef | 5429 | |
991eebf9 GN |
5430 | if (emulation_type & EMULTYPE_NO_REEXECUTE) |
5431 | return false; | |
5432 | ||
95b3cf69 XG |
5433 | if (!vcpu->arch.mmu.direct_map) { |
5434 | /* | |
5435 | * Write permission should be allowed since only | |
5436 | * write access need to be emulated. | |
5437 | */ | |
5438 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
a6f177ef | 5439 | |
95b3cf69 XG |
5440 | /* |
5441 | * If the mapping is invalid in guest, let cpu retry | |
5442 | * it to generate fault. | |
5443 | */ | |
5444 | if (gpa == UNMAPPED_GVA) | |
5445 | return true; | |
5446 | } | |
a6f177ef | 5447 | |
8e3d9d06 XG |
5448 | /* |
5449 | * Do not retry the unhandleable instruction if it faults on the | |
5450 | * readonly host memory, otherwise it will goto a infinite loop: | |
5451 | * retry instruction -> write #PF -> emulation fail -> retry | |
5452 | * instruction -> ... | |
5453 | */ | |
5454 | pfn = gfn_to_pfn(vcpu->kvm, gpa_to_gfn(gpa)); | |
95b3cf69 XG |
5455 | |
5456 | /* | |
5457 | * If the instruction failed on the error pfn, it can not be fixed, | |
5458 | * report the error to userspace. | |
5459 | */ | |
5460 | if (is_error_noslot_pfn(pfn)) | |
5461 | return false; | |
5462 | ||
5463 | kvm_release_pfn_clean(pfn); | |
5464 | ||
5465 | /* The instructions are well-emulated on direct mmu. */ | |
5466 | if (vcpu->arch.mmu.direct_map) { | |
5467 | unsigned int indirect_shadow_pages; | |
5468 | ||
5469 | spin_lock(&vcpu->kvm->mmu_lock); | |
5470 | indirect_shadow_pages = vcpu->kvm->arch.indirect_shadow_pages; | |
5471 | spin_unlock(&vcpu->kvm->mmu_lock); | |
5472 | ||
5473 | if (indirect_shadow_pages) | |
5474 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
5475 | ||
a6f177ef | 5476 | return true; |
8e3d9d06 | 5477 | } |
a6f177ef | 5478 | |
95b3cf69 XG |
5479 | /* |
5480 | * if emulation was due to access to shadowed page table | |
5481 | * and it failed try to unshadow page and re-enter the | |
5482 | * guest to let CPU execute the instruction. | |
5483 | */ | |
5484 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
93c05d3e XG |
5485 | |
5486 | /* | |
5487 | * If the access faults on its page table, it can not | |
5488 | * be fixed by unprotecting shadow page and it should | |
5489 | * be reported to userspace. | |
5490 | */ | |
5491 | return !write_fault_to_shadow_pgtable; | |
a6f177ef GN |
5492 | } |
5493 | ||
1cb3f3ae XG |
5494 | static bool retry_instruction(struct x86_emulate_ctxt *ctxt, |
5495 | unsigned long cr2, int emulation_type) | |
5496 | { | |
5497 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5498 | unsigned long last_retry_eip, last_retry_addr, gpa = cr2; | |
5499 | ||
5500 | last_retry_eip = vcpu->arch.last_retry_eip; | |
5501 | last_retry_addr = vcpu->arch.last_retry_addr; | |
5502 | ||
5503 | /* | |
5504 | * If the emulation is caused by #PF and it is non-page_table | |
5505 | * writing instruction, it means the VM-EXIT is caused by shadow | |
5506 | * page protected, we can zap the shadow page and retry this | |
5507 | * instruction directly. | |
5508 | * | |
5509 | * Note: if the guest uses a non-page-table modifying instruction | |
5510 | * on the PDE that points to the instruction, then we will unmap | |
5511 | * the instruction and go to an infinite loop. So, we cache the | |
5512 | * last retried eip and the last fault address, if we meet the eip | |
5513 | * and the address again, we can break out of the potential infinite | |
5514 | * loop. | |
5515 | */ | |
5516 | vcpu->arch.last_retry_eip = vcpu->arch.last_retry_addr = 0; | |
5517 | ||
5518 | if (!(emulation_type & EMULTYPE_RETRY)) | |
5519 | return false; | |
5520 | ||
5521 | if (x86_page_table_writing_insn(ctxt)) | |
5522 | return false; | |
5523 | ||
5524 | if (ctxt->eip == last_retry_eip && last_retry_addr == cr2) | |
5525 | return false; | |
5526 | ||
5527 | vcpu->arch.last_retry_eip = ctxt->eip; | |
5528 | vcpu->arch.last_retry_addr = cr2; | |
5529 | ||
5530 | if (!vcpu->arch.mmu.direct_map) | |
5531 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
5532 | ||
22368028 | 5533 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); |
1cb3f3ae XG |
5534 | |
5535 | return true; | |
5536 | } | |
5537 | ||
716d51ab GN |
5538 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu); |
5539 | static int complete_emulated_pio(struct kvm_vcpu *vcpu); | |
5540 | ||
64d60670 | 5541 | static void kvm_smm_changed(struct kvm_vcpu *vcpu) |
a584539b | 5542 | { |
64d60670 | 5543 | if (!(vcpu->arch.hflags & HF_SMM_MASK)) { |
660a5d51 PB |
5544 | /* This is a good place to trace that we are exiting SMM. */ |
5545 | trace_kvm_enter_smm(vcpu->vcpu_id, vcpu->arch.smbase, false); | |
5546 | ||
c43203ca PB |
5547 | /* Process a latched INIT or SMI, if any. */ |
5548 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
64d60670 | 5549 | } |
699023e2 PB |
5550 | |
5551 | kvm_mmu_reset_context(vcpu); | |
64d60670 PB |
5552 | } |
5553 | ||
5554 | static void kvm_set_hflags(struct kvm_vcpu *vcpu, unsigned emul_flags) | |
5555 | { | |
5556 | unsigned changed = vcpu->arch.hflags ^ emul_flags; | |
5557 | ||
a584539b | 5558 | vcpu->arch.hflags = emul_flags; |
64d60670 PB |
5559 | |
5560 | if (changed & HF_SMM_MASK) | |
5561 | kvm_smm_changed(vcpu); | |
a584539b PB |
5562 | } |
5563 | ||
4a1e10d5 PB |
5564 | static int kvm_vcpu_check_hw_bp(unsigned long addr, u32 type, u32 dr7, |
5565 | unsigned long *db) | |
5566 | { | |
5567 | u32 dr6 = 0; | |
5568 | int i; | |
5569 | u32 enable, rwlen; | |
5570 | ||
5571 | enable = dr7; | |
5572 | rwlen = dr7 >> 16; | |
5573 | for (i = 0; i < 4; i++, enable >>= 2, rwlen >>= 4) | |
5574 | if ((enable & 3) && (rwlen & 15) == type && db[i] == addr) | |
5575 | dr6 |= (1 << i); | |
5576 | return dr6; | |
5577 | } | |
5578 | ||
c8401dda | 5579 | static void kvm_vcpu_do_singlestep(struct kvm_vcpu *vcpu, int *r) |
663f4c61 PB |
5580 | { |
5581 | struct kvm_run *kvm_run = vcpu->run; | |
5582 | ||
c8401dda PB |
5583 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) { |
5584 | kvm_run->debug.arch.dr6 = DR6_BS | DR6_FIXED_1 | DR6_RTM; | |
5585 | kvm_run->debug.arch.pc = vcpu->arch.singlestep_rip; | |
5586 | kvm_run->debug.arch.exception = DB_VECTOR; | |
5587 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
5588 | *r = EMULATE_USER_EXIT; | |
5589 | } else { | |
5590 | /* | |
5591 | * "Certain debug exceptions may clear bit 0-3. The | |
5592 | * remaining contents of the DR6 register are never | |
5593 | * cleared by the processor". | |
5594 | */ | |
5595 | vcpu->arch.dr6 &= ~15; | |
5596 | vcpu->arch.dr6 |= DR6_BS | DR6_RTM; | |
5597 | kvm_queue_exception(vcpu, DB_VECTOR); | |
663f4c61 PB |
5598 | } |
5599 | } | |
5600 | ||
6affcbed KH |
5601 | int kvm_skip_emulated_instruction(struct kvm_vcpu *vcpu) |
5602 | { | |
5603 | unsigned long rflags = kvm_x86_ops->get_rflags(vcpu); | |
5604 | int r = EMULATE_DONE; | |
5605 | ||
5606 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
c8401dda PB |
5607 | |
5608 | /* | |
5609 | * rflags is the old, "raw" value of the flags. The new value has | |
5610 | * not been saved yet. | |
5611 | * | |
5612 | * This is correct even for TF set by the guest, because "the | |
5613 | * processor will not generate this exception after the instruction | |
5614 | * that sets the TF flag". | |
5615 | */ | |
5616 | if (unlikely(rflags & X86_EFLAGS_TF)) | |
5617 | kvm_vcpu_do_singlestep(vcpu, &r); | |
6affcbed KH |
5618 | return r == EMULATE_DONE; |
5619 | } | |
5620 | EXPORT_SYMBOL_GPL(kvm_skip_emulated_instruction); | |
5621 | ||
4a1e10d5 PB |
5622 | static bool kvm_vcpu_check_breakpoint(struct kvm_vcpu *vcpu, int *r) |
5623 | { | |
4a1e10d5 PB |
5624 | if (unlikely(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) && |
5625 | (vcpu->arch.guest_debug_dr7 & DR7_BP_EN_MASK)) { | |
82b32774 NA |
5626 | struct kvm_run *kvm_run = vcpu->run; |
5627 | unsigned long eip = kvm_get_linear_rip(vcpu); | |
5628 | u32 dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
4a1e10d5 PB |
5629 | vcpu->arch.guest_debug_dr7, |
5630 | vcpu->arch.eff_db); | |
5631 | ||
5632 | if (dr6 != 0) { | |
6f43ed01 | 5633 | kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1 | DR6_RTM; |
82b32774 | 5634 | kvm_run->debug.arch.pc = eip; |
4a1e10d5 PB |
5635 | kvm_run->debug.arch.exception = DB_VECTOR; |
5636 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
5637 | *r = EMULATE_USER_EXIT; | |
5638 | return true; | |
5639 | } | |
5640 | } | |
5641 | ||
4161a569 NA |
5642 | if (unlikely(vcpu->arch.dr7 & DR7_BP_EN_MASK) && |
5643 | !(kvm_get_rflags(vcpu) & X86_EFLAGS_RF)) { | |
82b32774 NA |
5644 | unsigned long eip = kvm_get_linear_rip(vcpu); |
5645 | u32 dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
4a1e10d5 PB |
5646 | vcpu->arch.dr7, |
5647 | vcpu->arch.db); | |
5648 | ||
5649 | if (dr6 != 0) { | |
5650 | vcpu->arch.dr6 &= ~15; | |
6f43ed01 | 5651 | vcpu->arch.dr6 |= dr6 | DR6_RTM; |
4a1e10d5 PB |
5652 | kvm_queue_exception(vcpu, DB_VECTOR); |
5653 | *r = EMULATE_DONE; | |
5654 | return true; | |
5655 | } | |
5656 | } | |
5657 | ||
5658 | return false; | |
5659 | } | |
5660 | ||
51d8b661 AP |
5661 | int x86_emulate_instruction(struct kvm_vcpu *vcpu, |
5662 | unsigned long cr2, | |
dc25e89e AP |
5663 | int emulation_type, |
5664 | void *insn, | |
5665 | int insn_len) | |
bbd9b64e | 5666 | { |
95cb2295 | 5667 | int r; |
9d74191a | 5668 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
7ae441ea | 5669 | bool writeback = true; |
93c05d3e | 5670 | bool write_fault_to_spt = vcpu->arch.write_fault_to_shadow_pgtable; |
bbd9b64e | 5671 | |
93c05d3e XG |
5672 | /* |
5673 | * Clear write_fault_to_shadow_pgtable here to ensure it is | |
5674 | * never reused. | |
5675 | */ | |
5676 | vcpu->arch.write_fault_to_shadow_pgtable = false; | |
26eef70c | 5677 | kvm_clear_exception_queue(vcpu); |
8d7d8102 | 5678 | |
571008da | 5679 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
8ec4722d | 5680 | init_emulate_ctxt(vcpu); |
4a1e10d5 PB |
5681 | |
5682 | /* | |
5683 | * We will reenter on the same instruction since | |
5684 | * we do not set complete_userspace_io. This does not | |
5685 | * handle watchpoints yet, those would be handled in | |
5686 | * the emulate_ops. | |
5687 | */ | |
5688 | if (kvm_vcpu_check_breakpoint(vcpu, &r)) | |
5689 | return r; | |
5690 | ||
9d74191a TY |
5691 | ctxt->interruptibility = 0; |
5692 | ctxt->have_exception = false; | |
e0ad0b47 | 5693 | ctxt->exception.vector = -1; |
9d74191a | 5694 | ctxt->perm_ok = false; |
bbd9b64e | 5695 | |
b51e974f | 5696 | ctxt->ud = emulation_type & EMULTYPE_TRAP_UD; |
4005996e | 5697 | |
9d74191a | 5698 | r = x86_decode_insn(ctxt, insn, insn_len); |
bbd9b64e | 5699 | |
e46479f8 | 5700 | trace_kvm_emulate_insn_start(vcpu); |
f2b5756b | 5701 | ++vcpu->stat.insn_emulation; |
1d2887e2 | 5702 | if (r != EMULATION_OK) { |
4005996e AK |
5703 | if (emulation_type & EMULTYPE_TRAP_UD) |
5704 | return EMULATE_FAIL; | |
991eebf9 GN |
5705 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
5706 | emulation_type)) | |
bbd9b64e | 5707 | return EMULATE_DONE; |
6d77dbfc GN |
5708 | if (emulation_type & EMULTYPE_SKIP) |
5709 | return EMULATE_FAIL; | |
5710 | return handle_emulation_failure(vcpu); | |
bbd9b64e CO |
5711 | } |
5712 | } | |
5713 | ||
ba8afb6b | 5714 | if (emulation_type & EMULTYPE_SKIP) { |
9dac77fa | 5715 | kvm_rip_write(vcpu, ctxt->_eip); |
bb663c7a NA |
5716 | if (ctxt->eflags & X86_EFLAGS_RF) |
5717 | kvm_set_rflags(vcpu, ctxt->eflags & ~X86_EFLAGS_RF); | |
ba8afb6b GN |
5718 | return EMULATE_DONE; |
5719 | } | |
5720 | ||
1cb3f3ae XG |
5721 | if (retry_instruction(ctxt, cr2, emulation_type)) |
5722 | return EMULATE_DONE; | |
5723 | ||
7ae441ea | 5724 | /* this is needed for vmware backdoor interface to work since it |
4d2179e1 | 5725 | changes registers values during IO operation */ |
7ae441ea GN |
5726 | if (vcpu->arch.emulate_regs_need_sync_from_vcpu) { |
5727 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; | |
dd856efa | 5728 | emulator_invalidate_register_cache(ctxt); |
7ae441ea | 5729 | } |
4d2179e1 | 5730 | |
5cd21917 | 5731 | restart: |
0f89b207 TL |
5732 | /* Save the faulting GPA (cr2) in the address field */ |
5733 | ctxt->exception.address = cr2; | |
5734 | ||
9d74191a | 5735 | r = x86_emulate_insn(ctxt); |
bbd9b64e | 5736 | |
775fde86 JR |
5737 | if (r == EMULATION_INTERCEPTED) |
5738 | return EMULATE_DONE; | |
5739 | ||
d2ddd1c4 | 5740 | if (r == EMULATION_FAILED) { |
991eebf9 GN |
5741 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
5742 | emulation_type)) | |
c3cd7ffa GN |
5743 | return EMULATE_DONE; |
5744 | ||
6d77dbfc | 5745 | return handle_emulation_failure(vcpu); |
bbd9b64e CO |
5746 | } |
5747 | ||
9d74191a | 5748 | if (ctxt->have_exception) { |
d2ddd1c4 | 5749 | r = EMULATE_DONE; |
ef54bcfe PB |
5750 | if (inject_emulated_exception(vcpu)) |
5751 | return r; | |
d2ddd1c4 | 5752 | } else if (vcpu->arch.pio.count) { |
0912c977 PB |
5753 | if (!vcpu->arch.pio.in) { |
5754 | /* FIXME: return into emulator if single-stepping. */ | |
3457e419 | 5755 | vcpu->arch.pio.count = 0; |
0912c977 | 5756 | } else { |
7ae441ea | 5757 | writeback = false; |
716d51ab GN |
5758 | vcpu->arch.complete_userspace_io = complete_emulated_pio; |
5759 | } | |
ac0a48c3 | 5760 | r = EMULATE_USER_EXIT; |
7ae441ea GN |
5761 | } else if (vcpu->mmio_needed) { |
5762 | if (!vcpu->mmio_is_write) | |
5763 | writeback = false; | |
ac0a48c3 | 5764 | r = EMULATE_USER_EXIT; |
716d51ab | 5765 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; |
7ae441ea | 5766 | } else if (r == EMULATION_RESTART) |
5cd21917 | 5767 | goto restart; |
d2ddd1c4 GN |
5768 | else |
5769 | r = EMULATE_DONE; | |
f850e2e6 | 5770 | |
7ae441ea | 5771 | if (writeback) { |
6addfc42 | 5772 | unsigned long rflags = kvm_x86_ops->get_rflags(vcpu); |
9d74191a | 5773 | toggle_interruptibility(vcpu, ctxt->interruptibility); |
7ae441ea | 5774 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
9d74191a | 5775 | kvm_rip_write(vcpu, ctxt->eip); |
c8401dda PB |
5776 | if (r == EMULATE_DONE && |
5777 | (ctxt->tf || (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP))) | |
5778 | kvm_vcpu_do_singlestep(vcpu, &r); | |
38827dbd NA |
5779 | if (!ctxt->have_exception || |
5780 | exception_type(ctxt->exception.vector) == EXCPT_TRAP) | |
5781 | __kvm_set_rflags(vcpu, ctxt->eflags); | |
6addfc42 PB |
5782 | |
5783 | /* | |
5784 | * For STI, interrupts are shadowed; so KVM_REQ_EVENT will | |
5785 | * do nothing, and it will be requested again as soon as | |
5786 | * the shadow expires. But we still need to check here, | |
5787 | * because POPF has no interrupt shadow. | |
5788 | */ | |
5789 | if (unlikely((ctxt->eflags & ~rflags) & X86_EFLAGS_IF)) | |
5790 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
7ae441ea GN |
5791 | } else |
5792 | vcpu->arch.emulate_regs_need_sync_to_vcpu = true; | |
e85d28f8 GN |
5793 | |
5794 | return r; | |
de7d789a | 5795 | } |
51d8b661 | 5796 | EXPORT_SYMBOL_GPL(x86_emulate_instruction); |
de7d789a | 5797 | |
cf8f70bf | 5798 | int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port) |
de7d789a | 5799 | { |
cf8f70bf | 5800 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
ca1d4a9e AK |
5801 | int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt, |
5802 | size, port, &val, 1); | |
cf8f70bf | 5803 | /* do not return to emulator after return from userspace */ |
7972995b | 5804 | vcpu->arch.pio.count = 0; |
de7d789a CO |
5805 | return ret; |
5806 | } | |
cf8f70bf | 5807 | EXPORT_SYMBOL_GPL(kvm_fast_pio_out); |
de7d789a | 5808 | |
8370c3d0 TL |
5809 | static int complete_fast_pio_in(struct kvm_vcpu *vcpu) |
5810 | { | |
5811 | unsigned long val; | |
5812 | ||
5813 | /* We should only ever be called with arch.pio.count equal to 1 */ | |
5814 | BUG_ON(vcpu->arch.pio.count != 1); | |
5815 | ||
5816 | /* For size less than 4 we merge, else we zero extend */ | |
5817 | val = (vcpu->arch.pio.size < 4) ? kvm_register_read(vcpu, VCPU_REGS_RAX) | |
5818 | : 0; | |
5819 | ||
5820 | /* | |
5821 | * Since vcpu->arch.pio.count == 1 let emulator_pio_in_emulated perform | |
5822 | * the copy and tracing | |
5823 | */ | |
5824 | emulator_pio_in_emulated(&vcpu->arch.emulate_ctxt, vcpu->arch.pio.size, | |
5825 | vcpu->arch.pio.port, &val, 1); | |
5826 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); | |
5827 | ||
5828 | return 1; | |
5829 | } | |
5830 | ||
5831 | int kvm_fast_pio_in(struct kvm_vcpu *vcpu, int size, unsigned short port) | |
5832 | { | |
5833 | unsigned long val; | |
5834 | int ret; | |
5835 | ||
5836 | /* For size less than 4 we merge, else we zero extend */ | |
5837 | val = (size < 4) ? kvm_register_read(vcpu, VCPU_REGS_RAX) : 0; | |
5838 | ||
5839 | ret = emulator_pio_in_emulated(&vcpu->arch.emulate_ctxt, size, port, | |
5840 | &val, 1); | |
5841 | if (ret) { | |
5842 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); | |
5843 | return ret; | |
5844 | } | |
5845 | ||
5846 | vcpu->arch.complete_userspace_io = complete_fast_pio_in; | |
5847 | ||
5848 | return 0; | |
5849 | } | |
5850 | EXPORT_SYMBOL_GPL(kvm_fast_pio_in); | |
5851 | ||
251a5fd6 | 5852 | static int kvmclock_cpu_down_prep(unsigned int cpu) |
8cfdc000 | 5853 | { |
0a3aee0d | 5854 | __this_cpu_write(cpu_tsc_khz, 0); |
251a5fd6 | 5855 | return 0; |
8cfdc000 ZA |
5856 | } |
5857 | ||
5858 | static void tsc_khz_changed(void *data) | |
c8076604 | 5859 | { |
8cfdc000 ZA |
5860 | struct cpufreq_freqs *freq = data; |
5861 | unsigned long khz = 0; | |
5862 | ||
5863 | if (data) | |
5864 | khz = freq->new; | |
5865 | else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) | |
5866 | khz = cpufreq_quick_get(raw_smp_processor_id()); | |
5867 | if (!khz) | |
5868 | khz = tsc_khz; | |
0a3aee0d | 5869 | __this_cpu_write(cpu_tsc_khz, khz); |
c8076604 GH |
5870 | } |
5871 | ||
c8076604 GH |
5872 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
5873 | void *data) | |
5874 | { | |
5875 | struct cpufreq_freqs *freq = data; | |
5876 | struct kvm *kvm; | |
5877 | struct kvm_vcpu *vcpu; | |
5878 | int i, send_ipi = 0; | |
5879 | ||
8cfdc000 ZA |
5880 | /* |
5881 | * We allow guests to temporarily run on slowing clocks, | |
5882 | * provided we notify them after, or to run on accelerating | |
5883 | * clocks, provided we notify them before. Thus time never | |
5884 | * goes backwards. | |
5885 | * | |
5886 | * However, we have a problem. We can't atomically update | |
5887 | * the frequency of a given CPU from this function; it is | |
5888 | * merely a notifier, which can be called from any CPU. | |
5889 | * Changing the TSC frequency at arbitrary points in time | |
5890 | * requires a recomputation of local variables related to | |
5891 | * the TSC for each VCPU. We must flag these local variables | |
5892 | * to be updated and be sure the update takes place with the | |
5893 | * new frequency before any guests proceed. | |
5894 | * | |
5895 | * Unfortunately, the combination of hotplug CPU and frequency | |
5896 | * change creates an intractable locking scenario; the order | |
5897 | * of when these callouts happen is undefined with respect to | |
5898 | * CPU hotplug, and they can race with each other. As such, | |
5899 | * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is | |
5900 | * undefined; you can actually have a CPU frequency change take | |
5901 | * place in between the computation of X and the setting of the | |
5902 | * variable. To protect against this problem, all updates of | |
5903 | * the per_cpu tsc_khz variable are done in an interrupt | |
5904 | * protected IPI, and all callers wishing to update the value | |
5905 | * must wait for a synchronous IPI to complete (which is trivial | |
5906 | * if the caller is on the CPU already). This establishes the | |
5907 | * necessary total order on variable updates. | |
5908 | * | |
5909 | * Note that because a guest time update may take place | |
5910 | * anytime after the setting of the VCPU's request bit, the | |
5911 | * correct TSC value must be set before the request. However, | |
5912 | * to ensure the update actually makes it to any guest which | |
5913 | * starts running in hardware virtualization between the set | |
5914 | * and the acquisition of the spinlock, we must also ping the | |
5915 | * CPU after setting the request bit. | |
5916 | * | |
5917 | */ | |
5918 | ||
c8076604 GH |
5919 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
5920 | return 0; | |
5921 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
5922 | return 0; | |
8cfdc000 ZA |
5923 | |
5924 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); | |
c8076604 | 5925 | |
2f303b74 | 5926 | spin_lock(&kvm_lock); |
c8076604 | 5927 | list_for_each_entry(kvm, &vm_list, vm_list) { |
988a2cae | 5928 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
5929 | if (vcpu->cpu != freq->cpu) |
5930 | continue; | |
c285545f | 5931 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
c8076604 | 5932 | if (vcpu->cpu != smp_processor_id()) |
8cfdc000 | 5933 | send_ipi = 1; |
c8076604 GH |
5934 | } |
5935 | } | |
2f303b74 | 5936 | spin_unlock(&kvm_lock); |
c8076604 GH |
5937 | |
5938 | if (freq->old < freq->new && send_ipi) { | |
5939 | /* | |
5940 | * We upscale the frequency. Must make the guest | |
5941 | * doesn't see old kvmclock values while running with | |
5942 | * the new frequency, otherwise we risk the guest sees | |
5943 | * time go backwards. | |
5944 | * | |
5945 | * In case we update the frequency for another cpu | |
5946 | * (which might be in guest context) send an interrupt | |
5947 | * to kick the cpu out of guest context. Next time | |
5948 | * guest context is entered kvmclock will be updated, | |
5949 | * so the guest will not see stale values. | |
5950 | */ | |
8cfdc000 | 5951 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); |
c8076604 GH |
5952 | } |
5953 | return 0; | |
5954 | } | |
5955 | ||
5956 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
8cfdc000 ZA |
5957 | .notifier_call = kvmclock_cpufreq_notifier |
5958 | }; | |
5959 | ||
251a5fd6 | 5960 | static int kvmclock_cpu_online(unsigned int cpu) |
8cfdc000 | 5961 | { |
251a5fd6 SAS |
5962 | tsc_khz_changed(NULL); |
5963 | return 0; | |
8cfdc000 ZA |
5964 | } |
5965 | ||
b820cc0c ZA |
5966 | static void kvm_timer_init(void) |
5967 | { | |
c285545f | 5968 | max_tsc_khz = tsc_khz; |
460dd42e | 5969 | |
b820cc0c | 5970 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
c285545f ZA |
5971 | #ifdef CONFIG_CPU_FREQ |
5972 | struct cpufreq_policy policy; | |
758f588d BP |
5973 | int cpu; |
5974 | ||
c285545f | 5975 | memset(&policy, 0, sizeof(policy)); |
3e26f230 AK |
5976 | cpu = get_cpu(); |
5977 | cpufreq_get_policy(&policy, cpu); | |
c285545f ZA |
5978 | if (policy.cpuinfo.max_freq) |
5979 | max_tsc_khz = policy.cpuinfo.max_freq; | |
3e26f230 | 5980 | put_cpu(); |
c285545f | 5981 | #endif |
b820cc0c ZA |
5982 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
5983 | CPUFREQ_TRANSITION_NOTIFIER); | |
5984 | } | |
c285545f | 5985 | pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz); |
460dd42e | 5986 | |
73c1b41e | 5987 | cpuhp_setup_state(CPUHP_AP_X86_KVM_CLK_ONLINE, "x86/kvm/clk:online", |
251a5fd6 | 5988 | kvmclock_cpu_online, kvmclock_cpu_down_prep); |
b820cc0c ZA |
5989 | } |
5990 | ||
ff9d07a0 ZY |
5991 | static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
5992 | ||
f5132b01 | 5993 | int kvm_is_in_guest(void) |
ff9d07a0 | 5994 | { |
086c9855 | 5995 | return __this_cpu_read(current_vcpu) != NULL; |
ff9d07a0 ZY |
5996 | } |
5997 | ||
5998 | static int kvm_is_user_mode(void) | |
5999 | { | |
6000 | int user_mode = 3; | |
dcf46b94 | 6001 | |
086c9855 AS |
6002 | if (__this_cpu_read(current_vcpu)) |
6003 | user_mode = kvm_x86_ops->get_cpl(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 6004 | |
ff9d07a0 ZY |
6005 | return user_mode != 0; |
6006 | } | |
6007 | ||
6008 | static unsigned long kvm_get_guest_ip(void) | |
6009 | { | |
6010 | unsigned long ip = 0; | |
dcf46b94 | 6011 | |
086c9855 AS |
6012 | if (__this_cpu_read(current_vcpu)) |
6013 | ip = kvm_rip_read(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 6014 | |
ff9d07a0 ZY |
6015 | return ip; |
6016 | } | |
6017 | ||
6018 | static struct perf_guest_info_callbacks kvm_guest_cbs = { | |
6019 | .is_in_guest = kvm_is_in_guest, | |
6020 | .is_user_mode = kvm_is_user_mode, | |
6021 | .get_guest_ip = kvm_get_guest_ip, | |
6022 | }; | |
6023 | ||
6024 | void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) | |
6025 | { | |
086c9855 | 6026 | __this_cpu_write(current_vcpu, vcpu); |
ff9d07a0 ZY |
6027 | } |
6028 | EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); | |
6029 | ||
6030 | void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) | |
6031 | { | |
086c9855 | 6032 | __this_cpu_write(current_vcpu, NULL); |
ff9d07a0 ZY |
6033 | } |
6034 | EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); | |
6035 | ||
ce88decf XG |
6036 | static void kvm_set_mmio_spte_mask(void) |
6037 | { | |
6038 | u64 mask; | |
6039 | int maxphyaddr = boot_cpu_data.x86_phys_bits; | |
6040 | ||
6041 | /* | |
6042 | * Set the reserved bits and the present bit of an paging-structure | |
6043 | * entry to generate page fault with PFER.RSV = 1. | |
6044 | */ | |
885032b9 | 6045 | /* Mask the reserved physical address bits. */ |
d1431483 | 6046 | mask = rsvd_bits(maxphyaddr, 51); |
885032b9 | 6047 | |
885032b9 | 6048 | /* Set the present bit. */ |
ce88decf XG |
6049 | mask |= 1ull; |
6050 | ||
6051 | #ifdef CONFIG_X86_64 | |
6052 | /* | |
6053 | * If reserved bit is not supported, clear the present bit to disable | |
6054 | * mmio page fault. | |
6055 | */ | |
6056 | if (maxphyaddr == 52) | |
6057 | mask &= ~1ull; | |
6058 | #endif | |
6059 | ||
dcdca5fe | 6060 | kvm_mmu_set_mmio_spte_mask(mask, mask); |
ce88decf XG |
6061 | } |
6062 | ||
16e8d74d MT |
6063 | #ifdef CONFIG_X86_64 |
6064 | static void pvclock_gtod_update_fn(struct work_struct *work) | |
6065 | { | |
d828199e MT |
6066 | struct kvm *kvm; |
6067 | ||
6068 | struct kvm_vcpu *vcpu; | |
6069 | int i; | |
6070 | ||
2f303b74 | 6071 | spin_lock(&kvm_lock); |
d828199e MT |
6072 | list_for_each_entry(kvm, &vm_list, vm_list) |
6073 | kvm_for_each_vcpu(i, vcpu, kvm) | |
105b21bb | 6074 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
d828199e | 6075 | atomic_set(&kvm_guest_has_master_clock, 0); |
2f303b74 | 6076 | spin_unlock(&kvm_lock); |
16e8d74d MT |
6077 | } |
6078 | ||
6079 | static DECLARE_WORK(pvclock_gtod_work, pvclock_gtod_update_fn); | |
6080 | ||
6081 | /* | |
6082 | * Notification about pvclock gtod data update. | |
6083 | */ | |
6084 | static int pvclock_gtod_notify(struct notifier_block *nb, unsigned long unused, | |
6085 | void *priv) | |
6086 | { | |
6087 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
6088 | struct timekeeper *tk = priv; | |
6089 | ||
6090 | update_pvclock_gtod(tk); | |
6091 | ||
6092 | /* disable master clock if host does not trust, or does not | |
6093 | * use, TSC clocksource | |
6094 | */ | |
6095 | if (gtod->clock.vclock_mode != VCLOCK_TSC && | |
6096 | atomic_read(&kvm_guest_has_master_clock) != 0) | |
6097 | queue_work(system_long_wq, &pvclock_gtod_work); | |
6098 | ||
6099 | return 0; | |
6100 | } | |
6101 | ||
6102 | static struct notifier_block pvclock_gtod_notifier = { | |
6103 | .notifier_call = pvclock_gtod_notify, | |
6104 | }; | |
6105 | #endif | |
6106 | ||
f8c16bba | 6107 | int kvm_arch_init(void *opaque) |
043405e1 | 6108 | { |
b820cc0c | 6109 | int r; |
6b61edf7 | 6110 | struct kvm_x86_ops *ops = opaque; |
f8c16bba | 6111 | |
f8c16bba ZX |
6112 | if (kvm_x86_ops) { |
6113 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
6114 | r = -EEXIST; |
6115 | goto out; | |
f8c16bba ZX |
6116 | } |
6117 | ||
6118 | if (!ops->cpu_has_kvm_support()) { | |
6119 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
6120 | r = -EOPNOTSUPP; |
6121 | goto out; | |
f8c16bba ZX |
6122 | } |
6123 | if (ops->disabled_by_bios()) { | |
6124 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
6125 | r = -EOPNOTSUPP; |
6126 | goto out; | |
f8c16bba ZX |
6127 | } |
6128 | ||
013f6a5d MT |
6129 | r = -ENOMEM; |
6130 | shared_msrs = alloc_percpu(struct kvm_shared_msrs); | |
6131 | if (!shared_msrs) { | |
6132 | printk(KERN_ERR "kvm: failed to allocate percpu kvm_shared_msrs\n"); | |
6133 | goto out; | |
6134 | } | |
6135 | ||
97db56ce AK |
6136 | r = kvm_mmu_module_init(); |
6137 | if (r) | |
013f6a5d | 6138 | goto out_free_percpu; |
97db56ce | 6139 | |
ce88decf | 6140 | kvm_set_mmio_spte_mask(); |
97db56ce | 6141 | |
f8c16bba | 6142 | kvm_x86_ops = ops; |
920c8377 | 6143 | |
7b52345e | 6144 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, |
ffb128c8 | 6145 | PT_DIRTY_MASK, PT64_NX_MASK, 0, |
d0ec49d4 | 6146 | PT_PRESENT_MASK, 0, sme_me_mask); |
b820cc0c | 6147 | kvm_timer_init(); |
c8076604 | 6148 | |
ff9d07a0 ZY |
6149 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
6150 | ||
d366bf7e | 6151 | if (boot_cpu_has(X86_FEATURE_XSAVE)) |
2acf923e DC |
6152 | host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); |
6153 | ||
c5cc421b | 6154 | kvm_lapic_init(); |
16e8d74d MT |
6155 | #ifdef CONFIG_X86_64 |
6156 | pvclock_gtod_register_notifier(&pvclock_gtod_notifier); | |
6157 | #endif | |
6158 | ||
f8c16bba | 6159 | return 0; |
56c6d28a | 6160 | |
013f6a5d MT |
6161 | out_free_percpu: |
6162 | free_percpu(shared_msrs); | |
56c6d28a | 6163 | out: |
56c6d28a | 6164 | return r; |
043405e1 | 6165 | } |
8776e519 | 6166 | |
f8c16bba ZX |
6167 | void kvm_arch_exit(void) |
6168 | { | |
cef84c30 | 6169 | kvm_lapic_exit(); |
ff9d07a0 ZY |
6170 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
6171 | ||
888d256e JK |
6172 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
6173 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
6174 | CPUFREQ_TRANSITION_NOTIFIER); | |
251a5fd6 | 6175 | cpuhp_remove_state_nocalls(CPUHP_AP_X86_KVM_CLK_ONLINE); |
16e8d74d MT |
6176 | #ifdef CONFIG_X86_64 |
6177 | pvclock_gtod_unregister_notifier(&pvclock_gtod_notifier); | |
6178 | #endif | |
f8c16bba | 6179 | kvm_x86_ops = NULL; |
56c6d28a | 6180 | kvm_mmu_module_exit(); |
013f6a5d | 6181 | free_percpu(shared_msrs); |
56c6d28a | 6182 | } |
f8c16bba | 6183 | |
5cb56059 | 6184 | int kvm_vcpu_halt(struct kvm_vcpu *vcpu) |
8776e519 HB |
6185 | { |
6186 | ++vcpu->stat.halt_exits; | |
35754c98 | 6187 | if (lapic_in_kernel(vcpu)) { |
a4535290 | 6188 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
6189 | return 1; |
6190 | } else { | |
6191 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
6192 | return 0; | |
6193 | } | |
6194 | } | |
5cb56059 JS |
6195 | EXPORT_SYMBOL_GPL(kvm_vcpu_halt); |
6196 | ||
6197 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) | |
6198 | { | |
6affcbed KH |
6199 | int ret = kvm_skip_emulated_instruction(vcpu); |
6200 | /* | |
6201 | * TODO: we might be squashing a GUESTDBG_SINGLESTEP-triggered | |
6202 | * KVM_EXIT_DEBUG here. | |
6203 | */ | |
6204 | return kvm_vcpu_halt(vcpu) && ret; | |
5cb56059 | 6205 | } |
8776e519 HB |
6206 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); |
6207 | ||
8ef81a9a | 6208 | #ifdef CONFIG_X86_64 |
55dd00a7 MT |
6209 | static int kvm_pv_clock_pairing(struct kvm_vcpu *vcpu, gpa_t paddr, |
6210 | unsigned long clock_type) | |
6211 | { | |
6212 | struct kvm_clock_pairing clock_pairing; | |
6213 | struct timespec ts; | |
80fbd89c | 6214 | u64 cycle; |
55dd00a7 MT |
6215 | int ret; |
6216 | ||
6217 | if (clock_type != KVM_CLOCK_PAIRING_WALLCLOCK) | |
6218 | return -KVM_EOPNOTSUPP; | |
6219 | ||
6220 | if (kvm_get_walltime_and_clockread(&ts, &cycle) == false) | |
6221 | return -KVM_EOPNOTSUPP; | |
6222 | ||
6223 | clock_pairing.sec = ts.tv_sec; | |
6224 | clock_pairing.nsec = ts.tv_nsec; | |
6225 | clock_pairing.tsc = kvm_read_l1_tsc(vcpu, cycle); | |
6226 | clock_pairing.flags = 0; | |
6227 | ||
6228 | ret = 0; | |
6229 | if (kvm_write_guest(vcpu->kvm, paddr, &clock_pairing, | |
6230 | sizeof(struct kvm_clock_pairing))) | |
6231 | ret = -KVM_EFAULT; | |
6232 | ||
6233 | return ret; | |
6234 | } | |
8ef81a9a | 6235 | #endif |
55dd00a7 | 6236 | |
6aef266c SV |
6237 | /* |
6238 | * kvm_pv_kick_cpu_op: Kick a vcpu. | |
6239 | * | |
6240 | * @apicid - apicid of vcpu to be kicked. | |
6241 | */ | |
6242 | static void kvm_pv_kick_cpu_op(struct kvm *kvm, unsigned long flags, int apicid) | |
6243 | { | |
24d2166b | 6244 | struct kvm_lapic_irq lapic_irq; |
6aef266c | 6245 | |
24d2166b R |
6246 | lapic_irq.shorthand = 0; |
6247 | lapic_irq.dest_mode = 0; | |
ebd28fcb | 6248 | lapic_irq.level = 0; |
24d2166b | 6249 | lapic_irq.dest_id = apicid; |
93bbf0b8 | 6250 | lapic_irq.msi_redir_hint = false; |
6aef266c | 6251 | |
24d2166b | 6252 | lapic_irq.delivery_mode = APIC_DM_REMRD; |
795a149e | 6253 | kvm_irq_delivery_to_apic(kvm, NULL, &lapic_irq, NULL); |
6aef266c SV |
6254 | } |
6255 | ||
d62caabb AS |
6256 | void kvm_vcpu_deactivate_apicv(struct kvm_vcpu *vcpu) |
6257 | { | |
6258 | vcpu->arch.apicv_active = false; | |
6259 | kvm_x86_ops->refresh_apicv_exec_ctrl(vcpu); | |
6260 | } | |
6261 | ||
8776e519 HB |
6262 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
6263 | { | |
6264 | unsigned long nr, a0, a1, a2, a3, ret; | |
6affcbed | 6265 | int op_64_bit, r; |
8776e519 | 6266 | |
6affcbed | 6267 | r = kvm_skip_emulated_instruction(vcpu); |
5cb56059 | 6268 | |
55cd8e5a GN |
6269 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
6270 | return kvm_hv_hypercall(vcpu); | |
6271 | ||
5fdbf976 MT |
6272 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
6273 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
6274 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
6275 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
6276 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 6277 | |
229456fc | 6278 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 6279 | |
a449c7aa NA |
6280 | op_64_bit = is_64_bit_mode(vcpu); |
6281 | if (!op_64_bit) { | |
8776e519 HB |
6282 | nr &= 0xFFFFFFFF; |
6283 | a0 &= 0xFFFFFFFF; | |
6284 | a1 &= 0xFFFFFFFF; | |
6285 | a2 &= 0xFFFFFFFF; | |
6286 | a3 &= 0xFFFFFFFF; | |
6287 | } | |
6288 | ||
07708c4a JK |
6289 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
6290 | ret = -KVM_EPERM; | |
6291 | goto out; | |
6292 | } | |
6293 | ||
8776e519 | 6294 | switch (nr) { |
b93463aa AK |
6295 | case KVM_HC_VAPIC_POLL_IRQ: |
6296 | ret = 0; | |
6297 | break; | |
6aef266c SV |
6298 | case KVM_HC_KICK_CPU: |
6299 | kvm_pv_kick_cpu_op(vcpu->kvm, a0, a1); | |
6300 | ret = 0; | |
6301 | break; | |
8ef81a9a | 6302 | #ifdef CONFIG_X86_64 |
55dd00a7 MT |
6303 | case KVM_HC_CLOCK_PAIRING: |
6304 | ret = kvm_pv_clock_pairing(vcpu, a0, a1); | |
6305 | break; | |
8ef81a9a | 6306 | #endif |
8776e519 HB |
6307 | default: |
6308 | ret = -KVM_ENOSYS; | |
6309 | break; | |
6310 | } | |
07708c4a | 6311 | out: |
a449c7aa NA |
6312 | if (!op_64_bit) |
6313 | ret = (u32)ret; | |
5fdbf976 | 6314 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 6315 | ++vcpu->stat.hypercalls; |
2f333bcb | 6316 | return r; |
8776e519 HB |
6317 | } |
6318 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
6319 | ||
b6785def | 6320 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) |
8776e519 | 6321 | { |
d6aa1000 | 6322 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
8776e519 | 6323 | char instruction[3]; |
5fdbf976 | 6324 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 6325 | |
8776e519 | 6326 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 6327 | |
ce2e852e DV |
6328 | return emulator_write_emulated(ctxt, rip, instruction, 3, |
6329 | &ctxt->exception); | |
8776e519 HB |
6330 | } |
6331 | ||
851ba692 | 6332 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 6333 | { |
782d422b MG |
6334 | return vcpu->run->request_interrupt_window && |
6335 | likely(!pic_in_kernel(vcpu->kvm)); | |
b6c7a5dc HB |
6336 | } |
6337 | ||
851ba692 | 6338 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 6339 | { |
851ba692 AK |
6340 | struct kvm_run *kvm_run = vcpu->run; |
6341 | ||
91586a3b | 6342 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
f077825a | 6343 | kvm_run->flags = is_smm(vcpu) ? KVM_RUN_X86_SMM : 0; |
2d3ad1f4 | 6344 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 6345 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
127a457a MG |
6346 | kvm_run->ready_for_interrupt_injection = |
6347 | pic_in_kernel(vcpu->kvm) || | |
782d422b | 6348 | kvm_vcpu_ready_for_interrupt_injection(vcpu); |
b6c7a5dc HB |
6349 | } |
6350 | ||
95ba8273 GN |
6351 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
6352 | { | |
6353 | int max_irr, tpr; | |
6354 | ||
6355 | if (!kvm_x86_ops->update_cr8_intercept) | |
6356 | return; | |
6357 | ||
bce87cce | 6358 | if (!lapic_in_kernel(vcpu)) |
88c808fd AK |
6359 | return; |
6360 | ||
d62caabb AS |
6361 | if (vcpu->arch.apicv_active) |
6362 | return; | |
6363 | ||
8db3baa2 GN |
6364 | if (!vcpu->arch.apic->vapic_addr) |
6365 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
6366 | else | |
6367 | max_irr = -1; | |
95ba8273 GN |
6368 | |
6369 | if (max_irr != -1) | |
6370 | max_irr >>= 4; | |
6371 | ||
6372 | tpr = kvm_lapic_get_cr8(vcpu); | |
6373 | ||
6374 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
6375 | } | |
6376 | ||
b6b8a145 | 6377 | static int inject_pending_event(struct kvm_vcpu *vcpu, bool req_int_win) |
95ba8273 | 6378 | { |
b6b8a145 JK |
6379 | int r; |
6380 | ||
95ba8273 | 6381 | /* try to reinject previous events if any */ |
664f8e26 WL |
6382 | if (vcpu->arch.exception.injected) { |
6383 | kvm_x86_ops->queue_exception(vcpu); | |
6384 | return 0; | |
6385 | } | |
6386 | ||
6387 | /* | |
6388 | * Exceptions must be injected immediately, or the exception | |
6389 | * frame will have the address of the NMI or interrupt handler. | |
6390 | */ | |
6391 | if (!vcpu->arch.exception.pending) { | |
6392 | if (vcpu->arch.nmi_injected) { | |
6393 | kvm_x86_ops->set_nmi(vcpu); | |
6394 | return 0; | |
6395 | } | |
6396 | ||
6397 | if (vcpu->arch.interrupt.pending) { | |
6398 | kvm_x86_ops->set_irq(vcpu); | |
6399 | return 0; | |
6400 | } | |
6401 | } | |
6402 | ||
6403 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { | |
6404 | r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); | |
6405 | if (r != 0) | |
6406 | return r; | |
6407 | } | |
6408 | ||
6409 | /* try to inject new event if pending */ | |
b59bb7bd | 6410 | if (vcpu->arch.exception.pending) { |
5c1c85d0 AK |
6411 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
6412 | vcpu->arch.exception.has_error_code, | |
6413 | vcpu->arch.exception.error_code); | |
d6e8c854 | 6414 | |
664f8e26 WL |
6415 | vcpu->arch.exception.pending = false; |
6416 | vcpu->arch.exception.injected = true; | |
6417 | ||
d6e8c854 NA |
6418 | if (exception_type(vcpu->arch.exception.nr) == EXCPT_FAULT) |
6419 | __kvm_set_rflags(vcpu, kvm_get_rflags(vcpu) | | |
6420 | X86_EFLAGS_RF); | |
6421 | ||
6bdf0662 NA |
6422 | if (vcpu->arch.exception.nr == DB_VECTOR && |
6423 | (vcpu->arch.dr7 & DR7_GD)) { | |
6424 | vcpu->arch.dr7 &= ~DR7_GD; | |
6425 | kvm_update_dr7(vcpu); | |
6426 | } | |
6427 | ||
cfcd20e5 | 6428 | kvm_x86_ops->queue_exception(vcpu); |
664f8e26 | 6429 | } else if (vcpu->arch.smi_pending && !is_smm(vcpu)) { |
c43203ca | 6430 | vcpu->arch.smi_pending = false; |
ee2cd4b7 | 6431 | enter_smm(vcpu); |
c43203ca | 6432 | } else if (vcpu->arch.nmi_pending && kvm_x86_ops->nmi_allowed(vcpu)) { |
321c5658 YS |
6433 | --vcpu->arch.nmi_pending; |
6434 | vcpu->arch.nmi_injected = true; | |
6435 | kvm_x86_ops->set_nmi(vcpu); | |
c7c9c56c | 6436 | } else if (kvm_cpu_has_injectable_intr(vcpu)) { |
9242b5b6 BD |
6437 | /* |
6438 | * Because interrupts can be injected asynchronously, we are | |
6439 | * calling check_nested_events again here to avoid a race condition. | |
6440 | * See https://lkml.org/lkml/2014/7/2/60 for discussion about this | |
6441 | * proposal and current concerns. Perhaps we should be setting | |
6442 | * KVM_REQ_EVENT only on certain events and not unconditionally? | |
6443 | */ | |
6444 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { | |
6445 | r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); | |
6446 | if (r != 0) | |
6447 | return r; | |
6448 | } | |
95ba8273 | 6449 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { |
66fd3f7f GN |
6450 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
6451 | false); | |
6452 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
6453 | } |
6454 | } | |
ee2cd4b7 | 6455 | |
b6b8a145 | 6456 | return 0; |
95ba8273 GN |
6457 | } |
6458 | ||
7460fb4a AK |
6459 | static void process_nmi(struct kvm_vcpu *vcpu) |
6460 | { | |
6461 | unsigned limit = 2; | |
6462 | ||
6463 | /* | |
6464 | * x86 is limited to one NMI running, and one NMI pending after it. | |
6465 | * If an NMI is already in progress, limit further NMIs to just one. | |
6466 | * Otherwise, allow two (and we'll inject the first one immediately). | |
6467 | */ | |
6468 | if (kvm_x86_ops->get_nmi_mask(vcpu) || vcpu->arch.nmi_injected) | |
6469 | limit = 1; | |
6470 | ||
6471 | vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0); | |
6472 | vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit); | |
6473 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
6474 | } | |
6475 | ||
660a5d51 PB |
6476 | #define put_smstate(type, buf, offset, val) \ |
6477 | *(type *)((buf) + (offset) - 0x7e00) = val | |
6478 | ||
ee2cd4b7 | 6479 | static u32 enter_smm_get_segment_flags(struct kvm_segment *seg) |
660a5d51 PB |
6480 | { |
6481 | u32 flags = 0; | |
6482 | flags |= seg->g << 23; | |
6483 | flags |= seg->db << 22; | |
6484 | flags |= seg->l << 21; | |
6485 | flags |= seg->avl << 20; | |
6486 | flags |= seg->present << 15; | |
6487 | flags |= seg->dpl << 13; | |
6488 | flags |= seg->s << 12; | |
6489 | flags |= seg->type << 8; | |
6490 | return flags; | |
6491 | } | |
6492 | ||
ee2cd4b7 | 6493 | static void enter_smm_save_seg_32(struct kvm_vcpu *vcpu, char *buf, int n) |
660a5d51 PB |
6494 | { |
6495 | struct kvm_segment seg; | |
6496 | int offset; | |
6497 | ||
6498 | kvm_get_segment(vcpu, &seg, n); | |
6499 | put_smstate(u32, buf, 0x7fa8 + n * 4, seg.selector); | |
6500 | ||
6501 | if (n < 3) | |
6502 | offset = 0x7f84 + n * 12; | |
6503 | else | |
6504 | offset = 0x7f2c + (n - 3) * 12; | |
6505 | ||
6506 | put_smstate(u32, buf, offset + 8, seg.base); | |
6507 | put_smstate(u32, buf, offset + 4, seg.limit); | |
ee2cd4b7 | 6508 | put_smstate(u32, buf, offset, enter_smm_get_segment_flags(&seg)); |
660a5d51 PB |
6509 | } |
6510 | ||
efbb288a | 6511 | #ifdef CONFIG_X86_64 |
ee2cd4b7 | 6512 | static void enter_smm_save_seg_64(struct kvm_vcpu *vcpu, char *buf, int n) |
660a5d51 PB |
6513 | { |
6514 | struct kvm_segment seg; | |
6515 | int offset; | |
6516 | u16 flags; | |
6517 | ||
6518 | kvm_get_segment(vcpu, &seg, n); | |
6519 | offset = 0x7e00 + n * 16; | |
6520 | ||
ee2cd4b7 | 6521 | flags = enter_smm_get_segment_flags(&seg) >> 8; |
660a5d51 PB |
6522 | put_smstate(u16, buf, offset, seg.selector); |
6523 | put_smstate(u16, buf, offset + 2, flags); | |
6524 | put_smstate(u32, buf, offset + 4, seg.limit); | |
6525 | put_smstate(u64, buf, offset + 8, seg.base); | |
6526 | } | |
efbb288a | 6527 | #endif |
660a5d51 | 6528 | |
ee2cd4b7 | 6529 | static void enter_smm_save_state_32(struct kvm_vcpu *vcpu, char *buf) |
660a5d51 PB |
6530 | { |
6531 | struct desc_ptr dt; | |
6532 | struct kvm_segment seg; | |
6533 | unsigned long val; | |
6534 | int i; | |
6535 | ||
6536 | put_smstate(u32, buf, 0x7ffc, kvm_read_cr0(vcpu)); | |
6537 | put_smstate(u32, buf, 0x7ff8, kvm_read_cr3(vcpu)); | |
6538 | put_smstate(u32, buf, 0x7ff4, kvm_get_rflags(vcpu)); | |
6539 | put_smstate(u32, buf, 0x7ff0, kvm_rip_read(vcpu)); | |
6540 | ||
6541 | for (i = 0; i < 8; i++) | |
6542 | put_smstate(u32, buf, 0x7fd0 + i * 4, kvm_register_read(vcpu, i)); | |
6543 | ||
6544 | kvm_get_dr(vcpu, 6, &val); | |
6545 | put_smstate(u32, buf, 0x7fcc, (u32)val); | |
6546 | kvm_get_dr(vcpu, 7, &val); | |
6547 | put_smstate(u32, buf, 0x7fc8, (u32)val); | |
6548 | ||
6549 | kvm_get_segment(vcpu, &seg, VCPU_SREG_TR); | |
6550 | put_smstate(u32, buf, 0x7fc4, seg.selector); | |
6551 | put_smstate(u32, buf, 0x7f64, seg.base); | |
6552 | put_smstate(u32, buf, 0x7f60, seg.limit); | |
ee2cd4b7 | 6553 | put_smstate(u32, buf, 0x7f5c, enter_smm_get_segment_flags(&seg)); |
660a5d51 PB |
6554 | |
6555 | kvm_get_segment(vcpu, &seg, VCPU_SREG_LDTR); | |
6556 | put_smstate(u32, buf, 0x7fc0, seg.selector); | |
6557 | put_smstate(u32, buf, 0x7f80, seg.base); | |
6558 | put_smstate(u32, buf, 0x7f7c, seg.limit); | |
ee2cd4b7 | 6559 | put_smstate(u32, buf, 0x7f78, enter_smm_get_segment_flags(&seg)); |
660a5d51 PB |
6560 | |
6561 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
6562 | put_smstate(u32, buf, 0x7f74, dt.address); | |
6563 | put_smstate(u32, buf, 0x7f70, dt.size); | |
6564 | ||
6565 | kvm_x86_ops->get_idt(vcpu, &dt); | |
6566 | put_smstate(u32, buf, 0x7f58, dt.address); | |
6567 | put_smstate(u32, buf, 0x7f54, dt.size); | |
6568 | ||
6569 | for (i = 0; i < 6; i++) | |
ee2cd4b7 | 6570 | enter_smm_save_seg_32(vcpu, buf, i); |
660a5d51 PB |
6571 | |
6572 | put_smstate(u32, buf, 0x7f14, kvm_read_cr4(vcpu)); | |
6573 | ||
6574 | /* revision id */ | |
6575 | put_smstate(u32, buf, 0x7efc, 0x00020000); | |
6576 | put_smstate(u32, buf, 0x7ef8, vcpu->arch.smbase); | |
6577 | } | |
6578 | ||
ee2cd4b7 | 6579 | static void enter_smm_save_state_64(struct kvm_vcpu *vcpu, char *buf) |
660a5d51 PB |
6580 | { |
6581 | #ifdef CONFIG_X86_64 | |
6582 | struct desc_ptr dt; | |
6583 | struct kvm_segment seg; | |
6584 | unsigned long val; | |
6585 | int i; | |
6586 | ||
6587 | for (i = 0; i < 16; i++) | |
6588 | put_smstate(u64, buf, 0x7ff8 - i * 8, kvm_register_read(vcpu, i)); | |
6589 | ||
6590 | put_smstate(u64, buf, 0x7f78, kvm_rip_read(vcpu)); | |
6591 | put_smstate(u32, buf, 0x7f70, kvm_get_rflags(vcpu)); | |
6592 | ||
6593 | kvm_get_dr(vcpu, 6, &val); | |
6594 | put_smstate(u64, buf, 0x7f68, val); | |
6595 | kvm_get_dr(vcpu, 7, &val); | |
6596 | put_smstate(u64, buf, 0x7f60, val); | |
6597 | ||
6598 | put_smstate(u64, buf, 0x7f58, kvm_read_cr0(vcpu)); | |
6599 | put_smstate(u64, buf, 0x7f50, kvm_read_cr3(vcpu)); | |
6600 | put_smstate(u64, buf, 0x7f48, kvm_read_cr4(vcpu)); | |
6601 | ||
6602 | put_smstate(u32, buf, 0x7f00, vcpu->arch.smbase); | |
6603 | ||
6604 | /* revision id */ | |
6605 | put_smstate(u32, buf, 0x7efc, 0x00020064); | |
6606 | ||
6607 | put_smstate(u64, buf, 0x7ed0, vcpu->arch.efer); | |
6608 | ||
6609 | kvm_get_segment(vcpu, &seg, VCPU_SREG_TR); | |
6610 | put_smstate(u16, buf, 0x7e90, seg.selector); | |
ee2cd4b7 | 6611 | put_smstate(u16, buf, 0x7e92, enter_smm_get_segment_flags(&seg) >> 8); |
660a5d51 PB |
6612 | put_smstate(u32, buf, 0x7e94, seg.limit); |
6613 | put_smstate(u64, buf, 0x7e98, seg.base); | |
6614 | ||
6615 | kvm_x86_ops->get_idt(vcpu, &dt); | |
6616 | put_smstate(u32, buf, 0x7e84, dt.size); | |
6617 | put_smstate(u64, buf, 0x7e88, dt.address); | |
6618 | ||
6619 | kvm_get_segment(vcpu, &seg, VCPU_SREG_LDTR); | |
6620 | put_smstate(u16, buf, 0x7e70, seg.selector); | |
ee2cd4b7 | 6621 | put_smstate(u16, buf, 0x7e72, enter_smm_get_segment_flags(&seg) >> 8); |
660a5d51 PB |
6622 | put_smstate(u32, buf, 0x7e74, seg.limit); |
6623 | put_smstate(u64, buf, 0x7e78, seg.base); | |
6624 | ||
6625 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
6626 | put_smstate(u32, buf, 0x7e64, dt.size); | |
6627 | put_smstate(u64, buf, 0x7e68, dt.address); | |
6628 | ||
6629 | for (i = 0; i < 6; i++) | |
ee2cd4b7 | 6630 | enter_smm_save_seg_64(vcpu, buf, i); |
660a5d51 PB |
6631 | #else |
6632 | WARN_ON_ONCE(1); | |
6633 | #endif | |
6634 | } | |
6635 | ||
ee2cd4b7 | 6636 | static void enter_smm(struct kvm_vcpu *vcpu) |
64d60670 | 6637 | { |
660a5d51 | 6638 | struct kvm_segment cs, ds; |
18c3626e | 6639 | struct desc_ptr dt; |
660a5d51 PB |
6640 | char buf[512]; |
6641 | u32 cr0; | |
6642 | ||
660a5d51 PB |
6643 | trace_kvm_enter_smm(vcpu->vcpu_id, vcpu->arch.smbase, true); |
6644 | vcpu->arch.hflags |= HF_SMM_MASK; | |
6645 | memset(buf, 0, 512); | |
d6321d49 | 6646 | if (guest_cpuid_has(vcpu, X86_FEATURE_LM)) |
ee2cd4b7 | 6647 | enter_smm_save_state_64(vcpu, buf); |
660a5d51 | 6648 | else |
ee2cd4b7 | 6649 | enter_smm_save_state_32(vcpu, buf); |
660a5d51 | 6650 | |
54bf36aa | 6651 | kvm_vcpu_write_guest(vcpu, vcpu->arch.smbase + 0xfe00, buf, sizeof(buf)); |
660a5d51 PB |
6652 | |
6653 | if (kvm_x86_ops->get_nmi_mask(vcpu)) | |
6654 | vcpu->arch.hflags |= HF_SMM_INSIDE_NMI_MASK; | |
6655 | else | |
6656 | kvm_x86_ops->set_nmi_mask(vcpu, true); | |
6657 | ||
6658 | kvm_set_rflags(vcpu, X86_EFLAGS_FIXED); | |
6659 | kvm_rip_write(vcpu, 0x8000); | |
6660 | ||
6661 | cr0 = vcpu->arch.cr0 & ~(X86_CR0_PE | X86_CR0_EM | X86_CR0_TS | X86_CR0_PG); | |
6662 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
6663 | vcpu->arch.cr0 = cr0; | |
6664 | ||
6665 | kvm_x86_ops->set_cr4(vcpu, 0); | |
6666 | ||
18c3626e PB |
6667 | /* Undocumented: IDT limit is set to zero on entry to SMM. */ |
6668 | dt.address = dt.size = 0; | |
6669 | kvm_x86_ops->set_idt(vcpu, &dt); | |
6670 | ||
660a5d51 PB |
6671 | __kvm_set_dr(vcpu, 7, DR7_FIXED_1); |
6672 | ||
6673 | cs.selector = (vcpu->arch.smbase >> 4) & 0xffff; | |
6674 | cs.base = vcpu->arch.smbase; | |
6675 | ||
6676 | ds.selector = 0; | |
6677 | ds.base = 0; | |
6678 | ||
6679 | cs.limit = ds.limit = 0xffffffff; | |
6680 | cs.type = ds.type = 0x3; | |
6681 | cs.dpl = ds.dpl = 0; | |
6682 | cs.db = ds.db = 0; | |
6683 | cs.s = ds.s = 1; | |
6684 | cs.l = ds.l = 0; | |
6685 | cs.g = ds.g = 1; | |
6686 | cs.avl = ds.avl = 0; | |
6687 | cs.present = ds.present = 1; | |
6688 | cs.unusable = ds.unusable = 0; | |
6689 | cs.padding = ds.padding = 0; | |
6690 | ||
6691 | kvm_set_segment(vcpu, &cs, VCPU_SREG_CS); | |
6692 | kvm_set_segment(vcpu, &ds, VCPU_SREG_DS); | |
6693 | kvm_set_segment(vcpu, &ds, VCPU_SREG_ES); | |
6694 | kvm_set_segment(vcpu, &ds, VCPU_SREG_FS); | |
6695 | kvm_set_segment(vcpu, &ds, VCPU_SREG_GS); | |
6696 | kvm_set_segment(vcpu, &ds, VCPU_SREG_SS); | |
6697 | ||
d6321d49 | 6698 | if (guest_cpuid_has(vcpu, X86_FEATURE_LM)) |
660a5d51 PB |
6699 | kvm_x86_ops->set_efer(vcpu, 0); |
6700 | ||
6701 | kvm_update_cpuid(vcpu); | |
6702 | kvm_mmu_reset_context(vcpu); | |
64d60670 PB |
6703 | } |
6704 | ||
ee2cd4b7 | 6705 | static void process_smi(struct kvm_vcpu *vcpu) |
c43203ca PB |
6706 | { |
6707 | vcpu->arch.smi_pending = true; | |
6708 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
6709 | } | |
6710 | ||
2860c4b1 PB |
6711 | void kvm_make_scan_ioapic_request(struct kvm *kvm) |
6712 | { | |
6713 | kvm_make_all_cpus_request(kvm, KVM_REQ_SCAN_IOAPIC); | |
6714 | } | |
6715 | ||
3d81bc7e | 6716 | static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu) |
c7c9c56c | 6717 | { |
5c919412 AS |
6718 | u64 eoi_exit_bitmap[4]; |
6719 | ||
3d81bc7e YZ |
6720 | if (!kvm_apic_hw_enabled(vcpu->arch.apic)) |
6721 | return; | |
c7c9c56c | 6722 | |
6308630b | 6723 | bitmap_zero(vcpu->arch.ioapic_handled_vectors, 256); |
c7c9c56c | 6724 | |
b053b2ae | 6725 | if (irqchip_split(vcpu->kvm)) |
6308630b | 6726 | kvm_scan_ioapic_routes(vcpu, vcpu->arch.ioapic_handled_vectors); |
db2bdcbb | 6727 | else { |
76dfafd5 | 6728 | if (kvm_x86_ops->sync_pir_to_irr && vcpu->arch.apicv_active) |
d62caabb | 6729 | kvm_x86_ops->sync_pir_to_irr(vcpu); |
6308630b | 6730 | kvm_ioapic_scan_entry(vcpu, vcpu->arch.ioapic_handled_vectors); |
db2bdcbb | 6731 | } |
5c919412 AS |
6732 | bitmap_or((ulong *)eoi_exit_bitmap, vcpu->arch.ioapic_handled_vectors, |
6733 | vcpu_to_synic(vcpu)->vec_bitmap, 256); | |
6734 | kvm_x86_ops->load_eoi_exitmap(vcpu, eoi_exit_bitmap); | |
c7c9c56c YZ |
6735 | } |
6736 | ||
a70656b6 RK |
6737 | static void kvm_vcpu_flush_tlb(struct kvm_vcpu *vcpu) |
6738 | { | |
6739 | ++vcpu->stat.tlb_flush; | |
6740 | kvm_x86_ops->tlb_flush(vcpu); | |
6741 | } | |
6742 | ||
4256f43f TC |
6743 | void kvm_vcpu_reload_apic_access_page(struct kvm_vcpu *vcpu) |
6744 | { | |
c24ae0dc TC |
6745 | struct page *page = NULL; |
6746 | ||
35754c98 | 6747 | if (!lapic_in_kernel(vcpu)) |
f439ed27 PB |
6748 | return; |
6749 | ||
4256f43f TC |
6750 | if (!kvm_x86_ops->set_apic_access_page_addr) |
6751 | return; | |
6752 | ||
c24ae0dc | 6753 | page = gfn_to_page(vcpu->kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT); |
e8fd5e9e AA |
6754 | if (is_error_page(page)) |
6755 | return; | |
c24ae0dc TC |
6756 | kvm_x86_ops->set_apic_access_page_addr(vcpu, page_to_phys(page)); |
6757 | ||
6758 | /* | |
6759 | * Do not pin apic access page in memory, the MMU notifier | |
6760 | * will call us again if it is migrated or swapped out. | |
6761 | */ | |
6762 | put_page(page); | |
4256f43f TC |
6763 | } |
6764 | EXPORT_SYMBOL_GPL(kvm_vcpu_reload_apic_access_page); | |
6765 | ||
9357d939 | 6766 | /* |
362c698f | 6767 | * Returns 1 to let vcpu_run() continue the guest execution loop without |
9357d939 TY |
6768 | * exiting to the userspace. Otherwise, the value will be returned to the |
6769 | * userspace. | |
6770 | */ | |
851ba692 | 6771 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
6772 | { |
6773 | int r; | |
62a193ed MG |
6774 | bool req_int_win = |
6775 | dm_request_for_irq_injection(vcpu) && | |
6776 | kvm_cpu_accept_dm_intr(vcpu); | |
6777 | ||
730dca42 | 6778 | bool req_immediate_exit = false; |
b6c7a5dc | 6779 | |
2fa6e1e1 | 6780 | if (kvm_request_pending(vcpu)) { |
a8eeb04a | 6781 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) |
2e53d63a | 6782 | kvm_mmu_unload(vcpu); |
a8eeb04a | 6783 | if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu)) |
2f599714 | 6784 | __kvm_migrate_timers(vcpu); |
d828199e MT |
6785 | if (kvm_check_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu)) |
6786 | kvm_gen_update_masterclock(vcpu->kvm); | |
0061d53d MT |
6787 | if (kvm_check_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu)) |
6788 | kvm_gen_kvmclock_update(vcpu); | |
34c238a1 ZA |
6789 | if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) { |
6790 | r = kvm_guest_time_update(vcpu); | |
8cfdc000 ZA |
6791 | if (unlikely(r)) |
6792 | goto out; | |
6793 | } | |
a8eeb04a | 6794 | if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu)) |
4731d4c7 | 6795 | kvm_mmu_sync_roots(vcpu); |
a8eeb04a | 6796 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) |
a70656b6 | 6797 | kvm_vcpu_flush_tlb(vcpu); |
a8eeb04a | 6798 | if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) { |
851ba692 | 6799 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
6800 | r = 0; |
6801 | goto out; | |
6802 | } | |
a8eeb04a | 6803 | if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) { |
851ba692 | 6804 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
bbeac283 | 6805 | vcpu->mmio_needed = 0; |
71c4dfaf JR |
6806 | r = 0; |
6807 | goto out; | |
6808 | } | |
af585b92 GN |
6809 | if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) { |
6810 | /* Page is swapped out. Do synthetic halt */ | |
6811 | vcpu->arch.apf.halted = true; | |
6812 | r = 1; | |
6813 | goto out; | |
6814 | } | |
c9aaa895 GC |
6815 | if (kvm_check_request(KVM_REQ_STEAL_UPDATE, vcpu)) |
6816 | record_steal_time(vcpu); | |
64d60670 PB |
6817 | if (kvm_check_request(KVM_REQ_SMI, vcpu)) |
6818 | process_smi(vcpu); | |
7460fb4a AK |
6819 | if (kvm_check_request(KVM_REQ_NMI, vcpu)) |
6820 | process_nmi(vcpu); | |
f5132b01 | 6821 | if (kvm_check_request(KVM_REQ_PMU, vcpu)) |
c6702c9d | 6822 | kvm_pmu_handle_event(vcpu); |
f5132b01 | 6823 | if (kvm_check_request(KVM_REQ_PMI, vcpu)) |
c6702c9d | 6824 | kvm_pmu_deliver_pmi(vcpu); |
7543a635 SR |
6825 | if (kvm_check_request(KVM_REQ_IOAPIC_EOI_EXIT, vcpu)) { |
6826 | BUG_ON(vcpu->arch.pending_ioapic_eoi > 255); | |
6827 | if (test_bit(vcpu->arch.pending_ioapic_eoi, | |
6308630b | 6828 | vcpu->arch.ioapic_handled_vectors)) { |
7543a635 SR |
6829 | vcpu->run->exit_reason = KVM_EXIT_IOAPIC_EOI; |
6830 | vcpu->run->eoi.vector = | |
6831 | vcpu->arch.pending_ioapic_eoi; | |
6832 | r = 0; | |
6833 | goto out; | |
6834 | } | |
6835 | } | |
3d81bc7e YZ |
6836 | if (kvm_check_request(KVM_REQ_SCAN_IOAPIC, vcpu)) |
6837 | vcpu_scan_ioapic(vcpu); | |
4256f43f TC |
6838 | if (kvm_check_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu)) |
6839 | kvm_vcpu_reload_apic_access_page(vcpu); | |
2ce79189 AS |
6840 | if (kvm_check_request(KVM_REQ_HV_CRASH, vcpu)) { |
6841 | vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; | |
6842 | vcpu->run->system_event.type = KVM_SYSTEM_EVENT_CRASH; | |
6843 | r = 0; | |
6844 | goto out; | |
6845 | } | |
e516cebb AS |
6846 | if (kvm_check_request(KVM_REQ_HV_RESET, vcpu)) { |
6847 | vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; | |
6848 | vcpu->run->system_event.type = KVM_SYSTEM_EVENT_RESET; | |
6849 | r = 0; | |
6850 | goto out; | |
6851 | } | |
db397571 AS |
6852 | if (kvm_check_request(KVM_REQ_HV_EXIT, vcpu)) { |
6853 | vcpu->run->exit_reason = KVM_EXIT_HYPERV; | |
6854 | vcpu->run->hyperv = vcpu->arch.hyperv.exit; | |
6855 | r = 0; | |
6856 | goto out; | |
6857 | } | |
f3b138c5 AS |
6858 | |
6859 | /* | |
6860 | * KVM_REQ_HV_STIMER has to be processed after | |
6861 | * KVM_REQ_CLOCK_UPDATE, because Hyper-V SynIC timers | |
6862 | * depend on the guest clock being up-to-date | |
6863 | */ | |
1f4b34f8 AS |
6864 | if (kvm_check_request(KVM_REQ_HV_STIMER, vcpu)) |
6865 | kvm_hv_process_stimers(vcpu); | |
2f52d58c | 6866 | } |
b93463aa | 6867 | |
b463a6f7 | 6868 | if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { |
0f1e261e | 6869 | ++vcpu->stat.req_event; |
66450a21 JK |
6870 | kvm_apic_accept_events(vcpu); |
6871 | if (vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { | |
6872 | r = 1; | |
6873 | goto out; | |
6874 | } | |
6875 | ||
b6b8a145 JK |
6876 | if (inject_pending_event(vcpu, req_int_win) != 0) |
6877 | req_immediate_exit = true; | |
321c5658 | 6878 | else { |
c43203ca PB |
6879 | /* Enable NMI/IRQ window open exits if needed. |
6880 | * | |
6881 | * SMIs have two cases: 1) they can be nested, and | |
6882 | * then there is nothing to do here because RSM will | |
6883 | * cause a vmexit anyway; 2) or the SMI can be pending | |
6884 | * because inject_pending_event has completed the | |
6885 | * injection of an IRQ or NMI from the previous vmexit, | |
6886 | * and then we request an immediate exit to inject the SMI. | |
6887 | */ | |
6888 | if (vcpu->arch.smi_pending && !is_smm(vcpu)) | |
6889 | req_immediate_exit = true; | |
321c5658 YS |
6890 | if (vcpu->arch.nmi_pending) |
6891 | kvm_x86_ops->enable_nmi_window(vcpu); | |
6892 | if (kvm_cpu_has_injectable_intr(vcpu) || req_int_win) | |
6893 | kvm_x86_ops->enable_irq_window(vcpu); | |
664f8e26 | 6894 | WARN_ON(vcpu->arch.exception.pending); |
321c5658 | 6895 | } |
b463a6f7 AK |
6896 | |
6897 | if (kvm_lapic_enabled(vcpu)) { | |
6898 | update_cr8_intercept(vcpu); | |
6899 | kvm_lapic_sync_to_vapic(vcpu); | |
6900 | } | |
6901 | } | |
6902 | ||
d8368af8 AK |
6903 | r = kvm_mmu_reload(vcpu); |
6904 | if (unlikely(r)) { | |
d905c069 | 6905 | goto cancel_injection; |
d8368af8 AK |
6906 | } |
6907 | ||
b6c7a5dc HB |
6908 | preempt_disable(); |
6909 | ||
6910 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
bd7e5b08 | 6911 | kvm_load_guest_fpu(vcpu); |
b95234c8 PB |
6912 | |
6913 | /* | |
6914 | * Disable IRQs before setting IN_GUEST_MODE. Posted interrupt | |
6915 | * IPI are then delayed after guest entry, which ensures that they | |
6916 | * result in virtual interrupt delivery. | |
6917 | */ | |
6918 | local_irq_disable(); | |
6b7e2d09 XG |
6919 | vcpu->mode = IN_GUEST_MODE; |
6920 | ||
01b71917 MT |
6921 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
6922 | ||
0f127d12 | 6923 | /* |
b95234c8 | 6924 | * 1) We should set ->mode before checking ->requests. Please see |
cde9af6e | 6925 | * the comment in kvm_vcpu_exiting_guest_mode(). |
b95234c8 PB |
6926 | * |
6927 | * 2) For APICv, we should set ->mode before checking PIR.ON. This | |
6928 | * pairs with the memory barrier implicit in pi_test_and_set_on | |
6929 | * (see vmx_deliver_posted_interrupt). | |
6930 | * | |
6931 | * 3) This also orders the write to mode from any reads to the page | |
6932 | * tables done while the VCPU is running. Please see the comment | |
6933 | * in kvm_flush_remote_tlbs. | |
6b7e2d09 | 6934 | */ |
01b71917 | 6935 | smp_mb__after_srcu_read_unlock(); |
b6c7a5dc | 6936 | |
b95234c8 PB |
6937 | /* |
6938 | * This handles the case where a posted interrupt was | |
6939 | * notified with kvm_vcpu_kick. | |
6940 | */ | |
6941 | if (kvm_lapic_enabled(vcpu)) { | |
6942 | if (kvm_x86_ops->sync_pir_to_irr && vcpu->arch.apicv_active) | |
6943 | kvm_x86_ops->sync_pir_to_irr(vcpu); | |
6944 | } | |
32f88400 | 6945 | |
2fa6e1e1 | 6946 | if (vcpu->mode == EXITING_GUEST_MODE || kvm_request_pending(vcpu) |
d94e1dc9 | 6947 | || need_resched() || signal_pending(current)) { |
6b7e2d09 | 6948 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 6949 | smp_wmb(); |
6c142801 AK |
6950 | local_irq_enable(); |
6951 | preempt_enable(); | |
01b71917 | 6952 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
6c142801 | 6953 | r = 1; |
d905c069 | 6954 | goto cancel_injection; |
6c142801 AK |
6955 | } |
6956 | ||
fc5b7f3b DM |
6957 | kvm_load_guest_xcr0(vcpu); |
6958 | ||
c43203ca PB |
6959 | if (req_immediate_exit) { |
6960 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
d6185f20 | 6961 | smp_send_reschedule(vcpu->cpu); |
c43203ca | 6962 | } |
d6185f20 | 6963 | |
8b89fe1f PB |
6964 | trace_kvm_entry(vcpu->vcpu_id); |
6965 | wait_lapic_expire(vcpu); | |
6edaa530 | 6966 | guest_enter_irqoff(); |
b6c7a5dc | 6967 | |
42dbaa5a | 6968 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
6969 | set_debugreg(0, 7); |
6970 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
6971 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
6972 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
6973 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
c77fb5fe | 6974 | set_debugreg(vcpu->arch.dr6, 6); |
ae561ede | 6975 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD; |
42dbaa5a | 6976 | } |
b6c7a5dc | 6977 | |
851ba692 | 6978 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 6979 | |
c77fb5fe PB |
6980 | /* |
6981 | * Do this here before restoring debug registers on the host. And | |
6982 | * since we do this before handling the vmexit, a DR access vmexit | |
6983 | * can (a) read the correct value of the debug registers, (b) set | |
6984 | * KVM_DEBUGREG_WONT_EXIT again. | |
6985 | */ | |
6986 | if (unlikely(vcpu->arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT)) { | |
c77fb5fe PB |
6987 | WARN_ON(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP); |
6988 | kvm_x86_ops->sync_dirty_debug_regs(vcpu); | |
70e4da7a PB |
6989 | kvm_update_dr0123(vcpu); |
6990 | kvm_update_dr6(vcpu); | |
6991 | kvm_update_dr7(vcpu); | |
6992 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD; | |
c77fb5fe PB |
6993 | } |
6994 | ||
24f1e32c FW |
6995 | /* |
6996 | * If the guest has used debug registers, at least dr7 | |
6997 | * will be disabled while returning to the host. | |
6998 | * If we don't have active breakpoints in the host, we don't | |
6999 | * care about the messed up debug address registers. But if | |
7000 | * we have some of them active, restore the old state. | |
7001 | */ | |
59d8eb53 | 7002 | if (hw_breakpoint_active()) |
24f1e32c | 7003 | hw_breakpoint_restore(); |
42dbaa5a | 7004 | |
4ba76538 | 7005 | vcpu->arch.last_guest_tsc = kvm_read_l1_tsc(vcpu, rdtsc()); |
1d5f066e | 7006 | |
6b7e2d09 | 7007 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 7008 | smp_wmb(); |
a547c6db | 7009 | |
fc5b7f3b DM |
7010 | kvm_put_guest_xcr0(vcpu); |
7011 | ||
a547c6db | 7012 | kvm_x86_ops->handle_external_intr(vcpu); |
b6c7a5dc HB |
7013 | |
7014 | ++vcpu->stat.exits; | |
7015 | ||
f2485b3e | 7016 | guest_exit_irqoff(); |
b6c7a5dc | 7017 | |
f2485b3e | 7018 | local_irq_enable(); |
b6c7a5dc HB |
7019 | preempt_enable(); |
7020 | ||
f656ce01 | 7021 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 7022 | |
b6c7a5dc HB |
7023 | /* |
7024 | * Profile KVM exit RIPs: | |
7025 | */ | |
7026 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
7027 | unsigned long rip = kvm_rip_read(vcpu); |
7028 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
7029 | } |
7030 | ||
cc578287 ZA |
7031 | if (unlikely(vcpu->arch.tsc_always_catchup)) |
7032 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); | |
298101da | 7033 | |
5cfb1d5a MT |
7034 | if (vcpu->arch.apic_attention) |
7035 | kvm_lapic_sync_from_vapic(vcpu); | |
b93463aa | 7036 | |
618232e2 | 7037 | vcpu->arch.gpa_available = false; |
851ba692 | 7038 | r = kvm_x86_ops->handle_exit(vcpu); |
d905c069 MT |
7039 | return r; |
7040 | ||
7041 | cancel_injection: | |
7042 | kvm_x86_ops->cancel_injection(vcpu); | |
ae7a2a3f MT |
7043 | if (unlikely(vcpu->arch.apic_attention)) |
7044 | kvm_lapic_sync_from_vapic(vcpu); | |
d7690175 MT |
7045 | out: |
7046 | return r; | |
7047 | } | |
b6c7a5dc | 7048 | |
362c698f PB |
7049 | static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu) |
7050 | { | |
bf9f6ac8 FW |
7051 | if (!kvm_arch_vcpu_runnable(vcpu) && |
7052 | (!kvm_x86_ops->pre_block || kvm_x86_ops->pre_block(vcpu) == 0)) { | |
9c8fd1ba PB |
7053 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
7054 | kvm_vcpu_block(vcpu); | |
7055 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); | |
bf9f6ac8 FW |
7056 | |
7057 | if (kvm_x86_ops->post_block) | |
7058 | kvm_x86_ops->post_block(vcpu); | |
7059 | ||
9c8fd1ba PB |
7060 | if (!kvm_check_request(KVM_REQ_UNHALT, vcpu)) |
7061 | return 1; | |
7062 | } | |
362c698f PB |
7063 | |
7064 | kvm_apic_accept_events(vcpu); | |
7065 | switch(vcpu->arch.mp_state) { | |
7066 | case KVM_MP_STATE_HALTED: | |
7067 | vcpu->arch.pv.pv_unhalted = false; | |
7068 | vcpu->arch.mp_state = | |
7069 | KVM_MP_STATE_RUNNABLE; | |
7070 | case KVM_MP_STATE_RUNNABLE: | |
7071 | vcpu->arch.apf.halted = false; | |
7072 | break; | |
7073 | case KVM_MP_STATE_INIT_RECEIVED: | |
7074 | break; | |
7075 | default: | |
7076 | return -EINTR; | |
7077 | break; | |
7078 | } | |
7079 | return 1; | |
7080 | } | |
09cec754 | 7081 | |
5d9bc648 PB |
7082 | static inline bool kvm_vcpu_running(struct kvm_vcpu *vcpu) |
7083 | { | |
0ad3bed6 PB |
7084 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) |
7085 | kvm_x86_ops->check_nested_events(vcpu, false); | |
7086 | ||
5d9bc648 PB |
7087 | return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
7088 | !vcpu->arch.apf.halted); | |
7089 | } | |
7090 | ||
362c698f | 7091 | static int vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
7092 | { |
7093 | int r; | |
f656ce01 | 7094 | struct kvm *kvm = vcpu->kvm; |
d7690175 | 7095 | |
f656ce01 | 7096 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 7097 | |
362c698f | 7098 | for (;;) { |
58f800d5 | 7099 | if (kvm_vcpu_running(vcpu)) { |
851ba692 | 7100 | r = vcpu_enter_guest(vcpu); |
bf9f6ac8 | 7101 | } else { |
362c698f | 7102 | r = vcpu_block(kvm, vcpu); |
bf9f6ac8 FW |
7103 | } |
7104 | ||
09cec754 GN |
7105 | if (r <= 0) |
7106 | break; | |
7107 | ||
72875d8a | 7108 | kvm_clear_request(KVM_REQ_PENDING_TIMER, vcpu); |
09cec754 GN |
7109 | if (kvm_cpu_has_pending_timer(vcpu)) |
7110 | kvm_inject_pending_timer_irqs(vcpu); | |
7111 | ||
782d422b MG |
7112 | if (dm_request_for_irq_injection(vcpu) && |
7113 | kvm_vcpu_ready_for_interrupt_injection(vcpu)) { | |
4ca7dd8c PB |
7114 | r = 0; |
7115 | vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; | |
09cec754 | 7116 | ++vcpu->stat.request_irq_exits; |
362c698f | 7117 | break; |
09cec754 | 7118 | } |
af585b92 GN |
7119 | |
7120 | kvm_check_async_pf_completion(vcpu); | |
7121 | ||
09cec754 GN |
7122 | if (signal_pending(current)) { |
7123 | r = -EINTR; | |
851ba692 | 7124 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 | 7125 | ++vcpu->stat.signal_exits; |
362c698f | 7126 | break; |
09cec754 GN |
7127 | } |
7128 | if (need_resched()) { | |
f656ce01 | 7129 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
c08ac06a | 7130 | cond_resched(); |
f656ce01 | 7131 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 7132 | } |
b6c7a5dc HB |
7133 | } |
7134 | ||
f656ce01 | 7135 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc HB |
7136 | |
7137 | return r; | |
7138 | } | |
7139 | ||
716d51ab GN |
7140 | static inline int complete_emulated_io(struct kvm_vcpu *vcpu) |
7141 | { | |
7142 | int r; | |
7143 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
7144 | r = emulate_instruction(vcpu, EMULTYPE_NO_DECODE); | |
7145 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); | |
7146 | if (r != EMULATE_DONE) | |
7147 | return 0; | |
7148 | return 1; | |
7149 | } | |
7150 | ||
7151 | static int complete_emulated_pio(struct kvm_vcpu *vcpu) | |
7152 | { | |
7153 | BUG_ON(!vcpu->arch.pio.count); | |
7154 | ||
7155 | return complete_emulated_io(vcpu); | |
7156 | } | |
7157 | ||
f78146b0 AK |
7158 | /* |
7159 | * Implements the following, as a state machine: | |
7160 | * | |
7161 | * read: | |
7162 | * for each fragment | |
87da7e66 XG |
7163 | * for each mmio piece in the fragment |
7164 | * write gpa, len | |
7165 | * exit | |
7166 | * copy data | |
f78146b0 AK |
7167 | * execute insn |
7168 | * | |
7169 | * write: | |
7170 | * for each fragment | |
87da7e66 XG |
7171 | * for each mmio piece in the fragment |
7172 | * write gpa, len | |
7173 | * copy data | |
7174 | * exit | |
f78146b0 | 7175 | */ |
716d51ab | 7176 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu) |
5287f194 AK |
7177 | { |
7178 | struct kvm_run *run = vcpu->run; | |
f78146b0 | 7179 | struct kvm_mmio_fragment *frag; |
87da7e66 | 7180 | unsigned len; |
5287f194 | 7181 | |
716d51ab | 7182 | BUG_ON(!vcpu->mmio_needed); |
5287f194 | 7183 | |
716d51ab | 7184 | /* Complete previous fragment */ |
87da7e66 XG |
7185 | frag = &vcpu->mmio_fragments[vcpu->mmio_cur_fragment]; |
7186 | len = min(8u, frag->len); | |
716d51ab | 7187 | if (!vcpu->mmio_is_write) |
87da7e66 XG |
7188 | memcpy(frag->data, run->mmio.data, len); |
7189 | ||
7190 | if (frag->len <= 8) { | |
7191 | /* Switch to the next fragment. */ | |
7192 | frag++; | |
7193 | vcpu->mmio_cur_fragment++; | |
7194 | } else { | |
7195 | /* Go forward to the next mmio piece. */ | |
7196 | frag->data += len; | |
7197 | frag->gpa += len; | |
7198 | frag->len -= len; | |
7199 | } | |
7200 | ||
a08d3b3b | 7201 | if (vcpu->mmio_cur_fragment >= vcpu->mmio_nr_fragments) { |
716d51ab | 7202 | vcpu->mmio_needed = 0; |
0912c977 PB |
7203 | |
7204 | /* FIXME: return into emulator if single-stepping. */ | |
cef4dea0 | 7205 | if (vcpu->mmio_is_write) |
716d51ab GN |
7206 | return 1; |
7207 | vcpu->mmio_read_completed = 1; | |
7208 | return complete_emulated_io(vcpu); | |
7209 | } | |
87da7e66 | 7210 | |
716d51ab GN |
7211 | run->exit_reason = KVM_EXIT_MMIO; |
7212 | run->mmio.phys_addr = frag->gpa; | |
7213 | if (vcpu->mmio_is_write) | |
87da7e66 XG |
7214 | memcpy(run->mmio.data, frag->data, min(8u, frag->len)); |
7215 | run->mmio.len = min(8u, frag->len); | |
716d51ab GN |
7216 | run->mmio.is_write = vcpu->mmio_is_write; |
7217 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; | |
7218 | return 0; | |
5287f194 AK |
7219 | } |
7220 | ||
716d51ab | 7221 | |
b6c7a5dc HB |
7222 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
7223 | { | |
c5bedc68 | 7224 | struct fpu *fpu = ¤t->thread.fpu; |
b6c7a5dc HB |
7225 | int r; |
7226 | sigset_t sigsaved; | |
7227 | ||
c4d72e2d | 7228 | fpu__activate_curr(fpu); |
e5c30142 | 7229 | |
ac9f6dc0 AK |
7230 | if (vcpu->sigset_active) |
7231 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
7232 | ||
a4535290 | 7233 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
2f173d26 JS |
7234 | if (kvm_run->immediate_exit) { |
7235 | r = -EINTR; | |
7236 | goto out; | |
7237 | } | |
b6c7a5dc | 7238 | kvm_vcpu_block(vcpu); |
66450a21 | 7239 | kvm_apic_accept_events(vcpu); |
72875d8a | 7240 | kvm_clear_request(KVM_REQ_UNHALT, vcpu); |
ac9f6dc0 | 7241 | r = -EAGAIN; |
a0595000 JS |
7242 | if (signal_pending(current)) { |
7243 | r = -EINTR; | |
7244 | vcpu->run->exit_reason = KVM_EXIT_INTR; | |
7245 | ++vcpu->stat.signal_exits; | |
7246 | } | |
ac9f6dc0 | 7247 | goto out; |
b6c7a5dc HB |
7248 | } |
7249 | ||
b6c7a5dc | 7250 | /* re-sync apic's tpr */ |
35754c98 | 7251 | if (!lapic_in_kernel(vcpu)) { |
eea1cff9 AP |
7252 | if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) { |
7253 | r = -EINVAL; | |
7254 | goto out; | |
7255 | } | |
7256 | } | |
b6c7a5dc | 7257 | |
716d51ab GN |
7258 | if (unlikely(vcpu->arch.complete_userspace_io)) { |
7259 | int (*cui)(struct kvm_vcpu *) = vcpu->arch.complete_userspace_io; | |
7260 | vcpu->arch.complete_userspace_io = NULL; | |
7261 | r = cui(vcpu); | |
7262 | if (r <= 0) | |
7263 | goto out; | |
7264 | } else | |
7265 | WARN_ON(vcpu->arch.pio.count || vcpu->mmio_needed); | |
5287f194 | 7266 | |
460df4c1 PB |
7267 | if (kvm_run->immediate_exit) |
7268 | r = -EINTR; | |
7269 | else | |
7270 | r = vcpu_run(vcpu); | |
b6c7a5dc HB |
7271 | |
7272 | out: | |
f1d86e46 | 7273 | post_kvm_run_save(vcpu); |
b6c7a5dc HB |
7274 | if (vcpu->sigset_active) |
7275 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
7276 | ||
b6c7a5dc HB |
7277 | return r; |
7278 | } | |
7279 | ||
7280 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
7281 | { | |
7ae441ea GN |
7282 | if (vcpu->arch.emulate_regs_need_sync_to_vcpu) { |
7283 | /* | |
7284 | * We are here if userspace calls get_regs() in the middle of | |
7285 | * instruction emulation. Registers state needs to be copied | |
4a969980 | 7286 | * back from emulation context to vcpu. Userspace shouldn't do |
7ae441ea GN |
7287 | * that usually, but some bad designed PV devices (vmware |
7288 | * backdoor interface) need this to work | |
7289 | */ | |
dd856efa | 7290 | emulator_writeback_register_cache(&vcpu->arch.emulate_ctxt); |
7ae441ea GN |
7291 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
7292 | } | |
5fdbf976 MT |
7293 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
7294 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
7295 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
7296 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
7297 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
7298 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
7299 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
7300 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 7301 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
7302 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
7303 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
7304 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
7305 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
7306 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
7307 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
7308 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
7309 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
7310 | #endif |
7311 | ||
5fdbf976 | 7312 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 7313 | regs->rflags = kvm_get_rflags(vcpu); |
b6c7a5dc | 7314 | |
b6c7a5dc HB |
7315 | return 0; |
7316 | } | |
7317 | ||
7318 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
7319 | { | |
7ae441ea GN |
7320 | vcpu->arch.emulate_regs_need_sync_from_vcpu = true; |
7321 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; | |
7322 | ||
5fdbf976 MT |
7323 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
7324 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
7325 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
7326 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
7327 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
7328 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
7329 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
7330 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 7331 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
7332 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
7333 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
7334 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
7335 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
7336 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
7337 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
7338 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
7339 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
7340 | #endif |
7341 | ||
5fdbf976 | 7342 | kvm_rip_write(vcpu, regs->rip); |
91586a3b | 7343 | kvm_set_rflags(vcpu, regs->rflags); |
b6c7a5dc | 7344 | |
b4f14abd JK |
7345 | vcpu->arch.exception.pending = false; |
7346 | ||
3842d135 AK |
7347 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
7348 | ||
b6c7a5dc HB |
7349 | return 0; |
7350 | } | |
7351 | ||
b6c7a5dc HB |
7352 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
7353 | { | |
7354 | struct kvm_segment cs; | |
7355 | ||
3e6e0aab | 7356 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
7357 | *db = cs.db; |
7358 | *l = cs.l; | |
7359 | } | |
7360 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
7361 | ||
7362 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
7363 | struct kvm_sregs *sregs) | |
7364 | { | |
89a27f4d | 7365 | struct desc_ptr dt; |
b6c7a5dc | 7366 | |
3e6e0aab GT |
7367 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
7368 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
7369 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
7370 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
7371 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
7372 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 7373 | |
3e6e0aab GT |
7374 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
7375 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
7376 | |
7377 | kvm_x86_ops->get_idt(vcpu, &dt); | |
89a27f4d GN |
7378 | sregs->idt.limit = dt.size; |
7379 | sregs->idt.base = dt.address; | |
b6c7a5dc | 7380 | kvm_x86_ops->get_gdt(vcpu, &dt); |
89a27f4d GN |
7381 | sregs->gdt.limit = dt.size; |
7382 | sregs->gdt.base = dt.address; | |
b6c7a5dc | 7383 | |
4d4ec087 | 7384 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c | 7385 | sregs->cr2 = vcpu->arch.cr2; |
9f8fe504 | 7386 | sregs->cr3 = kvm_read_cr3(vcpu); |
fc78f519 | 7387 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 7388 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 7389 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
7390 | sregs->apic_base = kvm_get_apic_base(vcpu); |
7391 | ||
923c61bb | 7392 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 7393 | |
36752c9b | 7394 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
7395 | set_bit(vcpu->arch.interrupt.nr, |
7396 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 7397 | |
b6c7a5dc HB |
7398 | return 0; |
7399 | } | |
7400 | ||
62d9f0db MT |
7401 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
7402 | struct kvm_mp_state *mp_state) | |
7403 | { | |
66450a21 | 7404 | kvm_apic_accept_events(vcpu); |
6aef266c SV |
7405 | if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED && |
7406 | vcpu->arch.pv.pv_unhalted) | |
7407 | mp_state->mp_state = KVM_MP_STATE_RUNNABLE; | |
7408 | else | |
7409 | mp_state->mp_state = vcpu->arch.mp_state; | |
7410 | ||
62d9f0db MT |
7411 | return 0; |
7412 | } | |
7413 | ||
7414 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
7415 | struct kvm_mp_state *mp_state) | |
7416 | { | |
bce87cce | 7417 | if (!lapic_in_kernel(vcpu) && |
66450a21 JK |
7418 | mp_state->mp_state != KVM_MP_STATE_RUNNABLE) |
7419 | return -EINVAL; | |
7420 | ||
28bf2888 DH |
7421 | /* INITs are latched while in SMM */ |
7422 | if ((is_smm(vcpu) || vcpu->arch.smi_pending) && | |
7423 | (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED || | |
7424 | mp_state->mp_state == KVM_MP_STATE_INIT_RECEIVED)) | |
7425 | return -EINVAL; | |
7426 | ||
66450a21 JK |
7427 | if (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED) { |
7428 | vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; | |
7429 | set_bit(KVM_APIC_SIPI, &vcpu->arch.apic->pending_events); | |
7430 | } else | |
7431 | vcpu->arch.mp_state = mp_state->mp_state; | |
3842d135 | 7432 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
62d9f0db MT |
7433 | return 0; |
7434 | } | |
7435 | ||
7f3d35fd KW |
7436 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, |
7437 | int reason, bool has_error_code, u32 error_code) | |
b6c7a5dc | 7438 | { |
9d74191a | 7439 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d | 7440 | int ret; |
e01c2426 | 7441 | |
8ec4722d | 7442 | init_emulate_ctxt(vcpu); |
c697518a | 7443 | |
7f3d35fd | 7444 | ret = emulator_task_switch(ctxt, tss_selector, idt_index, reason, |
9d74191a | 7445 | has_error_code, error_code); |
c697518a | 7446 | |
c697518a | 7447 | if (ret) |
19d04437 | 7448 | return EMULATE_FAIL; |
37817f29 | 7449 | |
9d74191a TY |
7450 | kvm_rip_write(vcpu, ctxt->eip); |
7451 | kvm_set_rflags(vcpu, ctxt->eflags); | |
3842d135 | 7452 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
19d04437 | 7453 | return EMULATE_DONE; |
37817f29 IE |
7454 | } |
7455 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
7456 | ||
b6c7a5dc HB |
7457 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
7458 | struct kvm_sregs *sregs) | |
7459 | { | |
58cb628d | 7460 | struct msr_data apic_base_msr; |
b6c7a5dc | 7461 | int mmu_reset_needed = 0; |
63f42e02 | 7462 | int pending_vec, max_bits, idx; |
89a27f4d | 7463 | struct desc_ptr dt; |
b6c7a5dc | 7464 | |
d6321d49 RK |
7465 | if (!guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) && |
7466 | (sregs->cr4 & X86_CR4_OSXSAVE)) | |
6d1068b3 PM |
7467 | return -EINVAL; |
7468 | ||
d3802286 JM |
7469 | apic_base_msr.data = sregs->apic_base; |
7470 | apic_base_msr.host_initiated = true; | |
7471 | if (kvm_set_apic_base(vcpu, &apic_base_msr)) | |
6d1068b3 PM |
7472 | return -EINVAL; |
7473 | ||
89a27f4d GN |
7474 | dt.size = sregs->idt.limit; |
7475 | dt.address = sregs->idt.base; | |
b6c7a5dc | 7476 | kvm_x86_ops->set_idt(vcpu, &dt); |
89a27f4d GN |
7477 | dt.size = sregs->gdt.limit; |
7478 | dt.address = sregs->gdt.base; | |
b6c7a5dc HB |
7479 | kvm_x86_ops->set_gdt(vcpu, &dt); |
7480 | ||
ad312c7c | 7481 | vcpu->arch.cr2 = sregs->cr2; |
9f8fe504 | 7482 | mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3; |
dc7e795e | 7483 | vcpu->arch.cr3 = sregs->cr3; |
aff48baa | 7484 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
b6c7a5dc | 7485 | |
2d3ad1f4 | 7486 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 7487 | |
f6801dff | 7488 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 7489 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc | 7490 | |
4d4ec087 | 7491 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 7492 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 7493 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 7494 | |
fc78f519 | 7495 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 7496 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
b9baba86 | 7497 | if (sregs->cr4 & (X86_CR4_OSXSAVE | X86_CR4_PKE)) |
00b27a3e | 7498 | kvm_update_cpuid(vcpu); |
63f42e02 XG |
7499 | |
7500 | idx = srcu_read_lock(&vcpu->kvm->srcu); | |
7c93be44 | 7501 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
9f8fe504 | 7502 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); |
7c93be44 MT |
7503 | mmu_reset_needed = 1; |
7504 | } | |
63f42e02 | 7505 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b6c7a5dc HB |
7506 | |
7507 | if (mmu_reset_needed) | |
7508 | kvm_mmu_reset_context(vcpu); | |
7509 | ||
a50abc3b | 7510 | max_bits = KVM_NR_INTERRUPTS; |
923c61bb GN |
7511 | pending_vec = find_first_bit( |
7512 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
7513 | if (pending_vec < max_bits) { | |
66fd3f7f | 7514 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb | 7515 | pr_debug("Set back pending irq %d\n", pending_vec); |
b6c7a5dc HB |
7516 | } |
7517 | ||
3e6e0aab GT |
7518 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
7519 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
7520 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
7521 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
7522 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
7523 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 7524 | |
3e6e0aab GT |
7525 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
7526 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 7527 | |
5f0269f5 ME |
7528 | update_cr8_intercept(vcpu); |
7529 | ||
9c3e4aab | 7530 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 7531 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 7532 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 7533 | !is_protmode(vcpu)) |
9c3e4aab MT |
7534 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
7535 | ||
3842d135 AK |
7536 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
7537 | ||
b6c7a5dc HB |
7538 | return 0; |
7539 | } | |
7540 | ||
d0bfb940 JK |
7541 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
7542 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 7543 | { |
355be0b9 | 7544 | unsigned long rflags; |
ae675ef0 | 7545 | int i, r; |
b6c7a5dc | 7546 | |
4f926bf2 JK |
7547 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
7548 | r = -EBUSY; | |
7549 | if (vcpu->arch.exception.pending) | |
2122ff5e | 7550 | goto out; |
4f926bf2 JK |
7551 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
7552 | kvm_queue_exception(vcpu, DB_VECTOR); | |
7553 | else | |
7554 | kvm_queue_exception(vcpu, BP_VECTOR); | |
7555 | } | |
7556 | ||
91586a3b JK |
7557 | /* |
7558 | * Read rflags as long as potentially injected trace flags are still | |
7559 | * filtered out. | |
7560 | */ | |
7561 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
7562 | |
7563 | vcpu->guest_debug = dbg->control; | |
7564 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
7565 | vcpu->guest_debug = 0; | |
7566 | ||
7567 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
7568 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
7569 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
c8639010 | 7570 | vcpu->arch.guest_debug_dr7 = dbg->arch.debugreg[7]; |
ae675ef0 JK |
7571 | } else { |
7572 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
7573 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
ae675ef0 | 7574 | } |
c8639010 | 7575 | kvm_update_dr7(vcpu); |
ae675ef0 | 7576 | |
f92653ee JK |
7577 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
7578 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + | |
7579 | get_segment_base(vcpu, VCPU_SREG_CS); | |
94fe45da | 7580 | |
91586a3b JK |
7581 | /* |
7582 | * Trigger an rflags update that will inject or remove the trace | |
7583 | * flags. | |
7584 | */ | |
7585 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 7586 | |
a96036b8 | 7587 | kvm_x86_ops->update_bp_intercept(vcpu); |
b6c7a5dc | 7588 | |
4f926bf2 | 7589 | r = 0; |
d0bfb940 | 7590 | |
2122ff5e | 7591 | out: |
b6c7a5dc HB |
7592 | |
7593 | return r; | |
7594 | } | |
7595 | ||
8b006791 ZX |
7596 | /* |
7597 | * Translate a guest virtual address to a guest physical address. | |
7598 | */ | |
7599 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
7600 | struct kvm_translation *tr) | |
7601 | { | |
7602 | unsigned long vaddr = tr->linear_address; | |
7603 | gpa_t gpa; | |
f656ce01 | 7604 | int idx; |
8b006791 | 7605 | |
f656ce01 | 7606 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 7607 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 7608 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
7609 | tr->physical_address = gpa; |
7610 | tr->valid = gpa != UNMAPPED_GVA; | |
7611 | tr->writeable = 1; | |
7612 | tr->usermode = 0; | |
8b006791 ZX |
7613 | |
7614 | return 0; | |
7615 | } | |
7616 | ||
d0752060 HB |
7617 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
7618 | { | |
c47ada30 | 7619 | struct fxregs_state *fxsave = |
7366ed77 | 7620 | &vcpu->arch.guest_fpu.state.fxsave; |
d0752060 | 7621 | |
d0752060 HB |
7622 | memcpy(fpu->fpr, fxsave->st_space, 128); |
7623 | fpu->fcw = fxsave->cwd; | |
7624 | fpu->fsw = fxsave->swd; | |
7625 | fpu->ftwx = fxsave->twd; | |
7626 | fpu->last_opcode = fxsave->fop; | |
7627 | fpu->last_ip = fxsave->rip; | |
7628 | fpu->last_dp = fxsave->rdp; | |
7629 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
7630 | ||
d0752060 HB |
7631 | return 0; |
7632 | } | |
7633 | ||
7634 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
7635 | { | |
c47ada30 | 7636 | struct fxregs_state *fxsave = |
7366ed77 | 7637 | &vcpu->arch.guest_fpu.state.fxsave; |
d0752060 | 7638 | |
d0752060 HB |
7639 | memcpy(fxsave->st_space, fpu->fpr, 128); |
7640 | fxsave->cwd = fpu->fcw; | |
7641 | fxsave->swd = fpu->fsw; | |
7642 | fxsave->twd = fpu->ftwx; | |
7643 | fxsave->fop = fpu->last_opcode; | |
7644 | fxsave->rip = fpu->last_ip; | |
7645 | fxsave->rdp = fpu->last_dp; | |
7646 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
7647 | ||
d0752060 HB |
7648 | return 0; |
7649 | } | |
7650 | ||
0ee6a517 | 7651 | static void fx_init(struct kvm_vcpu *vcpu) |
d0752060 | 7652 | { |
bf935b0b | 7653 | fpstate_init(&vcpu->arch.guest_fpu.state); |
782511b0 | 7654 | if (boot_cpu_has(X86_FEATURE_XSAVES)) |
7366ed77 | 7655 | vcpu->arch.guest_fpu.state.xsave.header.xcomp_bv = |
df1daba7 | 7656 | host_xcr0 | XSTATE_COMPACTION_ENABLED; |
d0752060 | 7657 | |
2acf923e DC |
7658 | /* |
7659 | * Ensure guest xcr0 is valid for loading | |
7660 | */ | |
d91cab78 | 7661 | vcpu->arch.xcr0 = XFEATURE_MASK_FP; |
2acf923e | 7662 | |
ad312c7c | 7663 | vcpu->arch.cr0 |= X86_CR0_ET; |
d0752060 | 7664 | } |
d0752060 HB |
7665 | |
7666 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) | |
7667 | { | |
2608d7a1 | 7668 | if (vcpu->guest_fpu_loaded) |
d0752060 HB |
7669 | return; |
7670 | ||
2acf923e DC |
7671 | /* |
7672 | * Restore all possible states in the guest, | |
7673 | * and assume host would use all available bits. | |
7674 | * Guest xcr0 would be loaded later. | |
7675 | */ | |
d0752060 | 7676 | vcpu->guest_fpu_loaded = 1; |
b1a74bf8 | 7677 | __kernel_fpu_begin(); |
38cfd5e3 PB |
7678 | /* PKRU is separately restored in kvm_x86_ops->run. */ |
7679 | __copy_kernel_to_fpregs(&vcpu->arch.guest_fpu.state, | |
7680 | ~XFEATURE_MASK_PKRU); | |
0c04851c | 7681 | trace_kvm_fpu(1); |
d0752060 | 7682 | } |
d0752060 HB |
7683 | |
7684 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
7685 | { | |
3d42de25 | 7686 | if (!vcpu->guest_fpu_loaded) |
d0752060 HB |
7687 | return; |
7688 | ||
7689 | vcpu->guest_fpu_loaded = 0; | |
4f836347 | 7690 | copy_fpregs_to_fpstate(&vcpu->arch.guest_fpu); |
b1a74bf8 | 7691 | __kernel_fpu_end(); |
f096ed85 | 7692 | ++vcpu->stat.fpu_reload; |
0c04851c | 7693 | trace_kvm_fpu(0); |
d0752060 | 7694 | } |
e9b11c17 ZX |
7695 | |
7696 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
7697 | { | |
bd768e14 IY |
7698 | void *wbinvd_dirty_mask = vcpu->arch.wbinvd_dirty_mask; |
7699 | ||
12f9a48f | 7700 | kvmclock_reset(vcpu); |
7f1ea208 | 7701 | |
e9b11c17 | 7702 | kvm_x86_ops->vcpu_free(vcpu); |
bd768e14 | 7703 | free_cpumask_var(wbinvd_dirty_mask); |
e9b11c17 ZX |
7704 | } |
7705 | ||
7706 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
7707 | unsigned int id) | |
7708 | { | |
c447e76b LL |
7709 | struct kvm_vcpu *vcpu; |
7710 | ||
6755bae8 ZA |
7711 | if (check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0) |
7712 | printk_once(KERN_WARNING | |
7713 | "kvm: SMP vm created on host with unstable TSC; " | |
7714 | "guest TSC will not be reliable\n"); | |
c447e76b LL |
7715 | |
7716 | vcpu = kvm_x86_ops->vcpu_create(kvm, id); | |
7717 | ||
c447e76b | 7718 | return vcpu; |
26e5215f | 7719 | } |
e9b11c17 | 7720 | |
26e5215f AK |
7721 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
7722 | { | |
7723 | int r; | |
e9b11c17 | 7724 | |
19efffa2 | 7725 | kvm_vcpu_mtrr_init(vcpu); |
9fc77441 MT |
7726 | r = vcpu_load(vcpu); |
7727 | if (r) | |
7728 | return r; | |
d28bc9dd | 7729 | kvm_vcpu_reset(vcpu, false); |
8a3c1a33 | 7730 | kvm_mmu_setup(vcpu); |
e9b11c17 | 7731 | vcpu_put(vcpu); |
26e5215f | 7732 | return r; |
e9b11c17 ZX |
7733 | } |
7734 | ||
31928aa5 | 7735 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 7736 | { |
8fe8ab46 | 7737 | struct msr_data msr; |
332967a3 | 7738 | struct kvm *kvm = vcpu->kvm; |
42897d86 | 7739 | |
d3457c87 RK |
7740 | kvm_hv_vcpu_postcreate(vcpu); |
7741 | ||
31928aa5 DD |
7742 | if (vcpu_load(vcpu)) |
7743 | return; | |
8fe8ab46 WA |
7744 | msr.data = 0x0; |
7745 | msr.index = MSR_IA32_TSC; | |
7746 | msr.host_initiated = true; | |
7747 | kvm_write_tsc(vcpu, &msr); | |
42897d86 MT |
7748 | vcpu_put(vcpu); |
7749 | ||
630994b3 MT |
7750 | if (!kvmclock_periodic_sync) |
7751 | return; | |
7752 | ||
332967a3 AJ |
7753 | schedule_delayed_work(&kvm->arch.kvmclock_sync_work, |
7754 | KVMCLOCK_SYNC_PERIOD); | |
42897d86 MT |
7755 | } |
7756 | ||
d40ccc62 | 7757 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 | 7758 | { |
9fc77441 | 7759 | int r; |
344d9588 GN |
7760 | vcpu->arch.apf.msr_val = 0; |
7761 | ||
9fc77441 MT |
7762 | r = vcpu_load(vcpu); |
7763 | BUG_ON(r); | |
e9b11c17 ZX |
7764 | kvm_mmu_unload(vcpu); |
7765 | vcpu_put(vcpu); | |
7766 | ||
7767 | kvm_x86_ops->vcpu_free(vcpu); | |
7768 | } | |
7769 | ||
d28bc9dd | 7770 | void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) |
e9b11c17 | 7771 | { |
e69fab5d PB |
7772 | vcpu->arch.hflags = 0; |
7773 | ||
c43203ca | 7774 | vcpu->arch.smi_pending = 0; |
7460fb4a AK |
7775 | atomic_set(&vcpu->arch.nmi_queued, 0); |
7776 | vcpu->arch.nmi_pending = 0; | |
448fa4a9 | 7777 | vcpu->arch.nmi_injected = false; |
5f7552d4 NA |
7778 | kvm_clear_interrupt_queue(vcpu); |
7779 | kvm_clear_exception_queue(vcpu); | |
664f8e26 | 7780 | vcpu->arch.exception.pending = false; |
448fa4a9 | 7781 | |
42dbaa5a | 7782 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); |
ae561ede | 7783 | kvm_update_dr0123(vcpu); |
6f43ed01 | 7784 | vcpu->arch.dr6 = DR6_INIT; |
73aaf249 | 7785 | kvm_update_dr6(vcpu); |
42dbaa5a | 7786 | vcpu->arch.dr7 = DR7_FIXED_1; |
c8639010 | 7787 | kvm_update_dr7(vcpu); |
42dbaa5a | 7788 | |
1119022c NA |
7789 | vcpu->arch.cr2 = 0; |
7790 | ||
3842d135 | 7791 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
344d9588 | 7792 | vcpu->arch.apf.msr_val = 0; |
c9aaa895 | 7793 | vcpu->arch.st.msr_val = 0; |
3842d135 | 7794 | |
12f9a48f GC |
7795 | kvmclock_reset(vcpu); |
7796 | ||
af585b92 GN |
7797 | kvm_clear_async_pf_completion_queue(vcpu); |
7798 | kvm_async_pf_hash_reset(vcpu); | |
7799 | vcpu->arch.apf.halted = false; | |
3842d135 | 7800 | |
64d60670 | 7801 | if (!init_event) { |
d28bc9dd | 7802 | kvm_pmu_reset(vcpu); |
64d60670 | 7803 | vcpu->arch.smbase = 0x30000; |
db2336a8 KH |
7804 | |
7805 | vcpu->arch.msr_platform_info = MSR_PLATFORM_INFO_CPUID_FAULT; | |
7806 | vcpu->arch.msr_misc_features_enables = 0; | |
64d60670 | 7807 | } |
f5132b01 | 7808 | |
66f7b72e JS |
7809 | memset(vcpu->arch.regs, 0, sizeof(vcpu->arch.regs)); |
7810 | vcpu->arch.regs_avail = ~0; | |
7811 | vcpu->arch.regs_dirty = ~0; | |
7812 | ||
d28bc9dd | 7813 | kvm_x86_ops->vcpu_reset(vcpu, init_event); |
e9b11c17 ZX |
7814 | } |
7815 | ||
2b4a273b | 7816 | void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector) |
66450a21 JK |
7817 | { |
7818 | struct kvm_segment cs; | |
7819 | ||
7820 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
7821 | cs.selector = vector << 8; | |
7822 | cs.base = vector << 12; | |
7823 | kvm_set_segment(vcpu, &cs, VCPU_SREG_CS); | |
7824 | kvm_rip_write(vcpu, 0); | |
e9b11c17 ZX |
7825 | } |
7826 | ||
13a34e06 | 7827 | int kvm_arch_hardware_enable(void) |
e9b11c17 | 7828 | { |
ca84d1a2 ZA |
7829 | struct kvm *kvm; |
7830 | struct kvm_vcpu *vcpu; | |
7831 | int i; | |
0dd6a6ed ZA |
7832 | int ret; |
7833 | u64 local_tsc; | |
7834 | u64 max_tsc = 0; | |
7835 | bool stable, backwards_tsc = false; | |
18863bdd AK |
7836 | |
7837 | kvm_shared_msr_cpu_online(); | |
13a34e06 | 7838 | ret = kvm_x86_ops->hardware_enable(); |
0dd6a6ed ZA |
7839 | if (ret != 0) |
7840 | return ret; | |
7841 | ||
4ea1636b | 7842 | local_tsc = rdtsc(); |
0dd6a6ed ZA |
7843 | stable = !check_tsc_unstable(); |
7844 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
7845 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
7846 | if (!stable && vcpu->cpu == smp_processor_id()) | |
105b21bb | 7847 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0dd6a6ed ZA |
7848 | if (stable && vcpu->arch.last_host_tsc > local_tsc) { |
7849 | backwards_tsc = true; | |
7850 | if (vcpu->arch.last_host_tsc > max_tsc) | |
7851 | max_tsc = vcpu->arch.last_host_tsc; | |
7852 | } | |
7853 | } | |
7854 | } | |
7855 | ||
7856 | /* | |
7857 | * Sometimes, even reliable TSCs go backwards. This happens on | |
7858 | * platforms that reset TSC during suspend or hibernate actions, but | |
7859 | * maintain synchronization. We must compensate. Fortunately, we can | |
7860 | * detect that condition here, which happens early in CPU bringup, | |
7861 | * before any KVM threads can be running. Unfortunately, we can't | |
7862 | * bring the TSCs fully up to date with real time, as we aren't yet far | |
7863 | * enough into CPU bringup that we know how much real time has actually | |
108b249c | 7864 | * elapsed; our helper function, ktime_get_boot_ns() will be using boot |
0dd6a6ed ZA |
7865 | * variables that haven't been updated yet. |
7866 | * | |
7867 | * So we simply find the maximum observed TSC above, then record the | |
7868 | * adjustment to TSC in each VCPU. When the VCPU later gets loaded, | |
7869 | * the adjustment will be applied. Note that we accumulate | |
7870 | * adjustments, in case multiple suspend cycles happen before some VCPU | |
7871 | * gets a chance to run again. In the event that no KVM threads get a | |
7872 | * chance to run, we will miss the entire elapsed period, as we'll have | |
7873 | * reset last_host_tsc, so VCPUs will not have the TSC adjusted and may | |
7874 | * loose cycle time. This isn't too big a deal, since the loss will be | |
7875 | * uniform across all VCPUs (not to mention the scenario is extremely | |
7876 | * unlikely). It is possible that a second hibernate recovery happens | |
7877 | * much faster than a first, causing the observed TSC here to be | |
7878 | * smaller; this would require additional padding adjustment, which is | |
7879 | * why we set last_host_tsc to the local tsc observed here. | |
7880 | * | |
7881 | * N.B. - this code below runs only on platforms with reliable TSC, | |
7882 | * as that is the only way backwards_tsc is set above. Also note | |
7883 | * that this runs for ALL vcpus, which is not a bug; all VCPUs should | |
7884 | * have the same delta_cyc adjustment applied if backwards_tsc | |
7885 | * is detected. Note further, this adjustment is only done once, | |
7886 | * as we reset last_host_tsc on all VCPUs to stop this from being | |
7887 | * called multiple times (one for each physical CPU bringup). | |
7888 | * | |
4a969980 | 7889 | * Platforms with unreliable TSCs don't have to deal with this, they |
0dd6a6ed ZA |
7890 | * will be compensated by the logic in vcpu_load, which sets the TSC to |
7891 | * catchup mode. This will catchup all VCPUs to real time, but cannot | |
7892 | * guarantee that they stay in perfect synchronization. | |
7893 | */ | |
7894 | if (backwards_tsc) { | |
7895 | u64 delta_cyc = max_tsc - local_tsc; | |
7896 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
a826faf1 | 7897 | kvm->arch.backwards_tsc_observed = true; |
0dd6a6ed ZA |
7898 | kvm_for_each_vcpu(i, vcpu, kvm) { |
7899 | vcpu->arch.tsc_offset_adjustment += delta_cyc; | |
7900 | vcpu->arch.last_host_tsc = local_tsc; | |
105b21bb | 7901 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
0dd6a6ed ZA |
7902 | } |
7903 | ||
7904 | /* | |
7905 | * We have to disable TSC offset matching.. if you were | |
7906 | * booting a VM while issuing an S4 host suspend.... | |
7907 | * you may have some problem. Solving this issue is | |
7908 | * left as an exercise to the reader. | |
7909 | */ | |
7910 | kvm->arch.last_tsc_nsec = 0; | |
7911 | kvm->arch.last_tsc_write = 0; | |
7912 | } | |
7913 | ||
7914 | } | |
7915 | return 0; | |
e9b11c17 ZX |
7916 | } |
7917 | ||
13a34e06 | 7918 | void kvm_arch_hardware_disable(void) |
e9b11c17 | 7919 | { |
13a34e06 RK |
7920 | kvm_x86_ops->hardware_disable(); |
7921 | drop_user_return_notifiers(); | |
e9b11c17 ZX |
7922 | } |
7923 | ||
7924 | int kvm_arch_hardware_setup(void) | |
7925 | { | |
9e9c3fe4 NA |
7926 | int r; |
7927 | ||
7928 | r = kvm_x86_ops->hardware_setup(); | |
7929 | if (r != 0) | |
7930 | return r; | |
7931 | ||
35181e86 HZ |
7932 | if (kvm_has_tsc_control) { |
7933 | /* | |
7934 | * Make sure the user can only configure tsc_khz values that | |
7935 | * fit into a signed integer. | |
7936 | * A min value is not calculated needed because it will always | |
7937 | * be 1 on all machines. | |
7938 | */ | |
7939 | u64 max = min(0x7fffffffULL, | |
7940 | __scale_tsc(kvm_max_tsc_scaling_ratio, tsc_khz)); | |
7941 | kvm_max_guest_tsc_khz = max; | |
7942 | ||
ad721883 | 7943 | kvm_default_tsc_scaling_ratio = 1ULL << kvm_tsc_scaling_ratio_frac_bits; |
35181e86 | 7944 | } |
ad721883 | 7945 | |
9e9c3fe4 NA |
7946 | kvm_init_msr_list(); |
7947 | return 0; | |
e9b11c17 ZX |
7948 | } |
7949 | ||
7950 | void kvm_arch_hardware_unsetup(void) | |
7951 | { | |
7952 | kvm_x86_ops->hardware_unsetup(); | |
7953 | } | |
7954 | ||
7955 | void kvm_arch_check_processor_compat(void *rtn) | |
7956 | { | |
7957 | kvm_x86_ops->check_processor_compatibility(rtn); | |
d71ba788 PB |
7958 | } |
7959 | ||
7960 | bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu) | |
7961 | { | |
7962 | return vcpu->kvm->arch.bsp_vcpu_id == vcpu->vcpu_id; | |
7963 | } | |
7964 | EXPORT_SYMBOL_GPL(kvm_vcpu_is_reset_bsp); | |
7965 | ||
7966 | bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) | |
7967 | { | |
7968 | return (vcpu->arch.apic_base & MSR_IA32_APICBASE_BSP) != 0; | |
e9b11c17 ZX |
7969 | } |
7970 | ||
54e9818f | 7971 | struct static_key kvm_no_apic_vcpu __read_mostly; |
bce87cce | 7972 | EXPORT_SYMBOL_GPL(kvm_no_apic_vcpu); |
54e9818f | 7973 | |
e9b11c17 ZX |
7974 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
7975 | { | |
7976 | struct page *page; | |
7977 | struct kvm *kvm; | |
7978 | int r; | |
7979 | ||
7980 | BUG_ON(vcpu->kvm == NULL); | |
7981 | kvm = vcpu->kvm; | |
7982 | ||
d62caabb | 7983 | vcpu->arch.apicv_active = kvm_x86_ops->get_enable_apicv(); |
6aef266c | 7984 | vcpu->arch.pv.pv_unhalted = false; |
9aabc88f | 7985 | vcpu->arch.emulate_ctxt.ops = &emulate_ops; |
58d269d8 | 7986 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_reset_bsp(vcpu)) |
a4535290 | 7987 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 7988 | else |
a4535290 | 7989 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
7990 | |
7991 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
7992 | if (!page) { | |
7993 | r = -ENOMEM; | |
7994 | goto fail; | |
7995 | } | |
ad312c7c | 7996 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 | 7997 | |
cc578287 | 7998 | kvm_set_tsc_khz(vcpu, max_tsc_khz); |
c285545f | 7999 | |
e9b11c17 ZX |
8000 | r = kvm_mmu_create(vcpu); |
8001 | if (r < 0) | |
8002 | goto fail_free_pio_data; | |
8003 | ||
8004 | if (irqchip_in_kernel(kvm)) { | |
8005 | r = kvm_create_lapic(vcpu); | |
8006 | if (r < 0) | |
8007 | goto fail_mmu_destroy; | |
54e9818f GN |
8008 | } else |
8009 | static_key_slow_inc(&kvm_no_apic_vcpu); | |
e9b11c17 | 8010 | |
890ca9ae HY |
8011 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
8012 | GFP_KERNEL); | |
8013 | if (!vcpu->arch.mce_banks) { | |
8014 | r = -ENOMEM; | |
443c39bc | 8015 | goto fail_free_lapic; |
890ca9ae HY |
8016 | } |
8017 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
8018 | ||
f1797359 WY |
8019 | if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL)) { |
8020 | r = -ENOMEM; | |
f5f48ee1 | 8021 | goto fail_free_mce_banks; |
f1797359 | 8022 | } |
f5f48ee1 | 8023 | |
0ee6a517 | 8024 | fx_init(vcpu); |
66f7b72e | 8025 | |
ba904635 | 8026 | vcpu->arch.ia32_tsc_adjust_msr = 0x0; |
0b79459b | 8027 | vcpu->arch.pv_time_enabled = false; |
d7876f1b PB |
8028 | |
8029 | vcpu->arch.guest_supported_xcr0 = 0; | |
4344ee98 | 8030 | vcpu->arch.guest_xstate_size = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET; |
d7876f1b | 8031 | |
5a4f55cd EK |
8032 | vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu); |
8033 | ||
74545705 RK |
8034 | vcpu->arch.pat = MSR_IA32_CR_PAT_DEFAULT; |
8035 | ||
af585b92 | 8036 | kvm_async_pf_hash_reset(vcpu); |
f5132b01 | 8037 | kvm_pmu_init(vcpu); |
af585b92 | 8038 | |
1c1a9ce9 | 8039 | vcpu->arch.pending_external_vector = -1; |
de63ad4c | 8040 | vcpu->arch.preempted_in_kernel = false; |
1c1a9ce9 | 8041 | |
5c919412 AS |
8042 | kvm_hv_vcpu_init(vcpu); |
8043 | ||
e9b11c17 | 8044 | return 0; |
0ee6a517 | 8045 | |
f5f48ee1 SY |
8046 | fail_free_mce_banks: |
8047 | kfree(vcpu->arch.mce_banks); | |
443c39bc WY |
8048 | fail_free_lapic: |
8049 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
8050 | fail_mmu_destroy: |
8051 | kvm_mmu_destroy(vcpu); | |
8052 | fail_free_pio_data: | |
ad312c7c | 8053 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
8054 | fail: |
8055 | return r; | |
8056 | } | |
8057 | ||
8058 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
8059 | { | |
f656ce01 MT |
8060 | int idx; |
8061 | ||
1f4b34f8 | 8062 | kvm_hv_vcpu_uninit(vcpu); |
f5132b01 | 8063 | kvm_pmu_destroy(vcpu); |
36cb93fd | 8064 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 8065 | kvm_free_lapic(vcpu); |
f656ce01 | 8066 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 8067 | kvm_mmu_destroy(vcpu); |
f656ce01 | 8068 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 8069 | free_page((unsigned long)vcpu->arch.pio_data); |
35754c98 | 8070 | if (!lapic_in_kernel(vcpu)) |
54e9818f | 8071 | static_key_slow_dec(&kvm_no_apic_vcpu); |
e9b11c17 | 8072 | } |
d19a9cd2 | 8073 | |
e790d9ef RK |
8074 | void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) |
8075 | { | |
ae97a3b8 | 8076 | kvm_x86_ops->sched_in(vcpu, cpu); |
e790d9ef RK |
8077 | } |
8078 | ||
e08b9637 | 8079 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
d19a9cd2 | 8080 | { |
e08b9637 CO |
8081 | if (type) |
8082 | return -EINVAL; | |
8083 | ||
6ef768fa | 8084 | INIT_HLIST_HEAD(&kvm->arch.mask_notifier_list); |
f05e70ac | 8085 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
365c8868 | 8086 | INIT_LIST_HEAD(&kvm->arch.zapped_obsolete_pages); |
4d5c5d0f | 8087 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
e0f0bbc5 | 8088 | atomic_set(&kvm->arch.noncoherent_dma_count, 0); |
d19a9cd2 | 8089 | |
5550af4d SY |
8090 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
8091 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
7a84428a AW |
8092 | /* Reserve bit 1 of irq_sources_bitmap for irqfd-resampler */ |
8093 | set_bit(KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID, | |
8094 | &kvm->arch.irq_sources_bitmap); | |
5550af4d | 8095 | |
038f8c11 | 8096 | raw_spin_lock_init(&kvm->arch.tsc_write_lock); |
1e08ec4a | 8097 | mutex_init(&kvm->arch.apic_map_lock); |
3f5ad8be | 8098 | mutex_init(&kvm->arch.hyperv.hv_lock); |
d828199e MT |
8099 | spin_lock_init(&kvm->arch.pvclock_gtod_sync_lock); |
8100 | ||
108b249c | 8101 | kvm->arch.kvmclock_offset = -ktime_get_boot_ns(); |
d828199e | 8102 | pvclock_update_vm_gtod_copy(kvm); |
53f658b3 | 8103 | |
7e44e449 | 8104 | INIT_DELAYED_WORK(&kvm->arch.kvmclock_update_work, kvmclock_update_fn); |
332967a3 | 8105 | INIT_DELAYED_WORK(&kvm->arch.kvmclock_sync_work, kvmclock_sync_fn); |
7e44e449 | 8106 | |
0eb05bf2 | 8107 | kvm_page_track_init(kvm); |
13d268ca | 8108 | kvm_mmu_init_vm(kvm); |
0eb05bf2 | 8109 | |
03543133 SS |
8110 | if (kvm_x86_ops->vm_init) |
8111 | return kvm_x86_ops->vm_init(kvm); | |
8112 | ||
d89f5eff | 8113 | return 0; |
d19a9cd2 ZX |
8114 | } |
8115 | ||
8116 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
8117 | { | |
9fc77441 MT |
8118 | int r; |
8119 | r = vcpu_load(vcpu); | |
8120 | BUG_ON(r); | |
d19a9cd2 ZX |
8121 | kvm_mmu_unload(vcpu); |
8122 | vcpu_put(vcpu); | |
8123 | } | |
8124 | ||
8125 | static void kvm_free_vcpus(struct kvm *kvm) | |
8126 | { | |
8127 | unsigned int i; | |
988a2cae | 8128 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
8129 | |
8130 | /* | |
8131 | * Unpin any mmu pages first. | |
8132 | */ | |
af585b92 GN |
8133 | kvm_for_each_vcpu(i, vcpu, kvm) { |
8134 | kvm_clear_async_pf_completion_queue(vcpu); | |
988a2cae | 8135 | kvm_unload_vcpu_mmu(vcpu); |
af585b92 | 8136 | } |
988a2cae GN |
8137 | kvm_for_each_vcpu(i, vcpu, kvm) |
8138 | kvm_arch_vcpu_free(vcpu); | |
8139 | ||
8140 | mutex_lock(&kvm->lock); | |
8141 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
8142 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 8143 | |
988a2cae GN |
8144 | atomic_set(&kvm->online_vcpus, 0); |
8145 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
8146 | } |
8147 | ||
ad8ba2cd SY |
8148 | void kvm_arch_sync_events(struct kvm *kvm) |
8149 | { | |
332967a3 | 8150 | cancel_delayed_work_sync(&kvm->arch.kvmclock_sync_work); |
7e44e449 | 8151 | cancel_delayed_work_sync(&kvm->arch.kvmclock_update_work); |
aea924f6 | 8152 | kvm_free_pit(kvm); |
ad8ba2cd SY |
8153 | } |
8154 | ||
1d8007bd | 8155 | int __x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size) |
9da0e4d5 PB |
8156 | { |
8157 | int i, r; | |
25188b99 | 8158 | unsigned long hva; |
f0d648bd PB |
8159 | struct kvm_memslots *slots = kvm_memslots(kvm); |
8160 | struct kvm_memory_slot *slot, old; | |
9da0e4d5 PB |
8161 | |
8162 | /* Called with kvm->slots_lock held. */ | |
1d8007bd PB |
8163 | if (WARN_ON(id >= KVM_MEM_SLOTS_NUM)) |
8164 | return -EINVAL; | |
9da0e4d5 | 8165 | |
f0d648bd PB |
8166 | slot = id_to_memslot(slots, id); |
8167 | if (size) { | |
b21629da | 8168 | if (slot->npages) |
f0d648bd PB |
8169 | return -EEXIST; |
8170 | ||
8171 | /* | |
8172 | * MAP_SHARED to prevent internal slot pages from being moved | |
8173 | * by fork()/COW. | |
8174 | */ | |
8175 | hva = vm_mmap(NULL, 0, size, PROT_READ | PROT_WRITE, | |
8176 | MAP_SHARED | MAP_ANONYMOUS, 0); | |
8177 | if (IS_ERR((void *)hva)) | |
8178 | return PTR_ERR((void *)hva); | |
8179 | } else { | |
8180 | if (!slot->npages) | |
8181 | return 0; | |
8182 | ||
8183 | hva = 0; | |
8184 | } | |
8185 | ||
8186 | old = *slot; | |
9da0e4d5 | 8187 | for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) { |
1d8007bd | 8188 | struct kvm_userspace_memory_region m; |
9da0e4d5 | 8189 | |
1d8007bd PB |
8190 | m.slot = id | (i << 16); |
8191 | m.flags = 0; | |
8192 | m.guest_phys_addr = gpa; | |
f0d648bd | 8193 | m.userspace_addr = hva; |
1d8007bd | 8194 | m.memory_size = size; |
9da0e4d5 PB |
8195 | r = __kvm_set_memory_region(kvm, &m); |
8196 | if (r < 0) | |
8197 | return r; | |
8198 | } | |
8199 | ||
f0d648bd PB |
8200 | if (!size) { |
8201 | r = vm_munmap(old.userspace_addr, old.npages * PAGE_SIZE); | |
8202 | WARN_ON(r < 0); | |
8203 | } | |
8204 | ||
9da0e4d5 PB |
8205 | return 0; |
8206 | } | |
8207 | EXPORT_SYMBOL_GPL(__x86_set_memory_region); | |
8208 | ||
1d8007bd | 8209 | int x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size) |
9da0e4d5 PB |
8210 | { |
8211 | int r; | |
8212 | ||
8213 | mutex_lock(&kvm->slots_lock); | |
1d8007bd | 8214 | r = __x86_set_memory_region(kvm, id, gpa, size); |
9da0e4d5 PB |
8215 | mutex_unlock(&kvm->slots_lock); |
8216 | ||
8217 | return r; | |
8218 | } | |
8219 | EXPORT_SYMBOL_GPL(x86_set_memory_region); | |
8220 | ||
d19a9cd2 ZX |
8221 | void kvm_arch_destroy_vm(struct kvm *kvm) |
8222 | { | |
27469d29 AH |
8223 | if (current->mm == kvm->mm) { |
8224 | /* | |
8225 | * Free memory regions allocated on behalf of userspace, | |
8226 | * unless the the memory map has changed due to process exit | |
8227 | * or fd copying. | |
8228 | */ | |
1d8007bd PB |
8229 | x86_set_memory_region(kvm, APIC_ACCESS_PAGE_PRIVATE_MEMSLOT, 0, 0); |
8230 | x86_set_memory_region(kvm, IDENTITY_PAGETABLE_PRIVATE_MEMSLOT, 0, 0); | |
8231 | x86_set_memory_region(kvm, TSS_PRIVATE_MEMSLOT, 0, 0); | |
27469d29 | 8232 | } |
03543133 SS |
8233 | if (kvm_x86_ops->vm_destroy) |
8234 | kvm_x86_ops->vm_destroy(kvm); | |
c761159c PX |
8235 | kvm_pic_destroy(kvm); |
8236 | kvm_ioapic_destroy(kvm); | |
d19a9cd2 | 8237 | kvm_free_vcpus(kvm); |
af1bae54 | 8238 | kvfree(rcu_dereference_check(kvm->arch.apic_map, 1)); |
13d268ca | 8239 | kvm_mmu_uninit_vm(kvm); |
2beb6dad | 8240 | kvm_page_track_cleanup(kvm); |
d19a9cd2 | 8241 | } |
0de10343 | 8242 | |
5587027c | 8243 | void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, |
db3fe4eb TY |
8244 | struct kvm_memory_slot *dont) |
8245 | { | |
8246 | int i; | |
8247 | ||
d89cc617 TY |
8248 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
8249 | if (!dont || free->arch.rmap[i] != dont->arch.rmap[i]) { | |
548ef284 | 8250 | kvfree(free->arch.rmap[i]); |
d89cc617 | 8251 | free->arch.rmap[i] = NULL; |
77d11309 | 8252 | } |
d89cc617 TY |
8253 | if (i == 0) |
8254 | continue; | |
8255 | ||
8256 | if (!dont || free->arch.lpage_info[i - 1] != | |
8257 | dont->arch.lpage_info[i - 1]) { | |
548ef284 | 8258 | kvfree(free->arch.lpage_info[i - 1]); |
d89cc617 | 8259 | free->arch.lpage_info[i - 1] = NULL; |
db3fe4eb TY |
8260 | } |
8261 | } | |
21ebbeda XG |
8262 | |
8263 | kvm_page_track_free_memslot(free, dont); | |
db3fe4eb TY |
8264 | } |
8265 | ||
5587027c AK |
8266 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
8267 | unsigned long npages) | |
db3fe4eb TY |
8268 | { |
8269 | int i; | |
8270 | ||
d89cc617 | 8271 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
92f94f1e | 8272 | struct kvm_lpage_info *linfo; |
db3fe4eb TY |
8273 | unsigned long ugfn; |
8274 | int lpages; | |
d89cc617 | 8275 | int level = i + 1; |
db3fe4eb TY |
8276 | |
8277 | lpages = gfn_to_index(slot->base_gfn + npages - 1, | |
8278 | slot->base_gfn, level) + 1; | |
8279 | ||
d89cc617 | 8280 | slot->arch.rmap[i] = |
a7c3e901 | 8281 | kvzalloc(lpages * sizeof(*slot->arch.rmap[i]), GFP_KERNEL); |
d89cc617 | 8282 | if (!slot->arch.rmap[i]) |
77d11309 | 8283 | goto out_free; |
d89cc617 TY |
8284 | if (i == 0) |
8285 | continue; | |
77d11309 | 8286 | |
a7c3e901 | 8287 | linfo = kvzalloc(lpages * sizeof(*linfo), GFP_KERNEL); |
92f94f1e | 8288 | if (!linfo) |
db3fe4eb TY |
8289 | goto out_free; |
8290 | ||
92f94f1e XG |
8291 | slot->arch.lpage_info[i - 1] = linfo; |
8292 | ||
db3fe4eb | 8293 | if (slot->base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1)) |
92f94f1e | 8294 | linfo[0].disallow_lpage = 1; |
db3fe4eb | 8295 | if ((slot->base_gfn + npages) & (KVM_PAGES_PER_HPAGE(level) - 1)) |
92f94f1e | 8296 | linfo[lpages - 1].disallow_lpage = 1; |
db3fe4eb TY |
8297 | ugfn = slot->userspace_addr >> PAGE_SHIFT; |
8298 | /* | |
8299 | * If the gfn and userspace address are not aligned wrt each | |
8300 | * other, or if explicitly asked to, disable large page | |
8301 | * support for this slot | |
8302 | */ | |
8303 | if ((slot->base_gfn ^ ugfn) & (KVM_PAGES_PER_HPAGE(level) - 1) || | |
8304 | !kvm_largepages_enabled()) { | |
8305 | unsigned long j; | |
8306 | ||
8307 | for (j = 0; j < lpages; ++j) | |
92f94f1e | 8308 | linfo[j].disallow_lpage = 1; |
db3fe4eb TY |
8309 | } |
8310 | } | |
8311 | ||
21ebbeda XG |
8312 | if (kvm_page_track_create_memslot(slot, npages)) |
8313 | goto out_free; | |
8314 | ||
db3fe4eb TY |
8315 | return 0; |
8316 | ||
8317 | out_free: | |
d89cc617 | 8318 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
548ef284 | 8319 | kvfree(slot->arch.rmap[i]); |
d89cc617 TY |
8320 | slot->arch.rmap[i] = NULL; |
8321 | if (i == 0) | |
8322 | continue; | |
8323 | ||
548ef284 | 8324 | kvfree(slot->arch.lpage_info[i - 1]); |
d89cc617 | 8325 | slot->arch.lpage_info[i - 1] = NULL; |
db3fe4eb TY |
8326 | } |
8327 | return -ENOMEM; | |
8328 | } | |
8329 | ||
15f46015 | 8330 | void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) |
e59dbe09 | 8331 | { |
e6dff7d1 TY |
8332 | /* |
8333 | * memslots->generation has been incremented. | |
8334 | * mmio generation may have reached its maximum value. | |
8335 | */ | |
54bf36aa | 8336 | kvm_mmu_invalidate_mmio_sptes(kvm, slots); |
e59dbe09 TY |
8337 | } |
8338 | ||
f7784b8e MT |
8339 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
8340 | struct kvm_memory_slot *memslot, | |
09170a49 | 8341 | const struct kvm_userspace_memory_region *mem, |
7b6195a9 | 8342 | enum kvm_mr_change change) |
0de10343 | 8343 | { |
f7784b8e MT |
8344 | return 0; |
8345 | } | |
8346 | ||
88178fd4 KH |
8347 | static void kvm_mmu_slot_apply_flags(struct kvm *kvm, |
8348 | struct kvm_memory_slot *new) | |
8349 | { | |
8350 | /* Still write protect RO slot */ | |
8351 | if (new->flags & KVM_MEM_READONLY) { | |
8352 | kvm_mmu_slot_remove_write_access(kvm, new); | |
8353 | return; | |
8354 | } | |
8355 | ||
8356 | /* | |
8357 | * Call kvm_x86_ops dirty logging hooks when they are valid. | |
8358 | * | |
8359 | * kvm_x86_ops->slot_disable_log_dirty is called when: | |
8360 | * | |
8361 | * - KVM_MR_CREATE with dirty logging is disabled | |
8362 | * - KVM_MR_FLAGS_ONLY with dirty logging is disabled in new flag | |
8363 | * | |
8364 | * The reason is, in case of PML, we need to set D-bit for any slots | |
8365 | * with dirty logging disabled in order to eliminate unnecessary GPA | |
8366 | * logging in PML buffer (and potential PML buffer full VMEXT). This | |
8367 | * guarantees leaving PML enabled during guest's lifetime won't have | |
8368 | * any additonal overhead from PML when guest is running with dirty | |
8369 | * logging disabled for memory slots. | |
8370 | * | |
8371 | * kvm_x86_ops->slot_enable_log_dirty is called when switching new slot | |
8372 | * to dirty logging mode. | |
8373 | * | |
8374 | * If kvm_x86_ops dirty logging hooks are invalid, use write protect. | |
8375 | * | |
8376 | * In case of write protect: | |
8377 | * | |
8378 | * Write protect all pages for dirty logging. | |
8379 | * | |
8380 | * All the sptes including the large sptes which point to this | |
8381 | * slot are set to readonly. We can not create any new large | |
8382 | * spte on this slot until the end of the logging. | |
8383 | * | |
8384 | * See the comments in fast_page_fault(). | |
8385 | */ | |
8386 | if (new->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
8387 | if (kvm_x86_ops->slot_enable_log_dirty) | |
8388 | kvm_x86_ops->slot_enable_log_dirty(kvm, new); | |
8389 | else | |
8390 | kvm_mmu_slot_remove_write_access(kvm, new); | |
8391 | } else { | |
8392 | if (kvm_x86_ops->slot_disable_log_dirty) | |
8393 | kvm_x86_ops->slot_disable_log_dirty(kvm, new); | |
8394 | } | |
8395 | } | |
8396 | ||
f7784b8e | 8397 | void kvm_arch_commit_memory_region(struct kvm *kvm, |
09170a49 | 8398 | const struct kvm_userspace_memory_region *mem, |
8482644a | 8399 | const struct kvm_memory_slot *old, |
f36f3f28 | 8400 | const struct kvm_memory_slot *new, |
8482644a | 8401 | enum kvm_mr_change change) |
f7784b8e | 8402 | { |
8482644a | 8403 | int nr_mmu_pages = 0; |
f7784b8e | 8404 | |
48c0e4e9 XG |
8405 | if (!kvm->arch.n_requested_mmu_pages) |
8406 | nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); | |
8407 | ||
48c0e4e9 | 8408 | if (nr_mmu_pages) |
0de10343 | 8409 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); |
1c91cad4 | 8410 | |
3ea3b7fa WL |
8411 | /* |
8412 | * Dirty logging tracks sptes in 4k granularity, meaning that large | |
8413 | * sptes have to be split. If live migration is successful, the guest | |
8414 | * in the source machine will be destroyed and large sptes will be | |
8415 | * created in the destination. However, if the guest continues to run | |
8416 | * in the source machine (for example if live migration fails), small | |
8417 | * sptes will remain around and cause bad performance. | |
8418 | * | |
8419 | * Scan sptes if dirty logging has been stopped, dropping those | |
8420 | * which can be collapsed into a single large-page spte. Later | |
8421 | * page faults will create the large-page sptes. | |
8422 | */ | |
8423 | if ((change != KVM_MR_DELETE) && | |
8424 | (old->flags & KVM_MEM_LOG_DIRTY_PAGES) && | |
8425 | !(new->flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8426 | kvm_mmu_zap_collapsible_sptes(kvm, new); | |
8427 | ||
c972f3b1 | 8428 | /* |
88178fd4 | 8429 | * Set up write protection and/or dirty logging for the new slot. |
c126d94f | 8430 | * |
88178fd4 KH |
8431 | * For KVM_MR_DELETE and KVM_MR_MOVE, the shadow pages of old slot have |
8432 | * been zapped so no dirty logging staff is needed for old slot. For | |
8433 | * KVM_MR_FLAGS_ONLY, the old slot is essentially the same one as the | |
8434 | * new and it's also covered when dealing with the new slot. | |
f36f3f28 PB |
8435 | * |
8436 | * FIXME: const-ify all uses of struct kvm_memory_slot. | |
c972f3b1 | 8437 | */ |
88178fd4 | 8438 | if (change != KVM_MR_DELETE) |
f36f3f28 | 8439 | kvm_mmu_slot_apply_flags(kvm, (struct kvm_memory_slot *) new); |
0de10343 | 8440 | } |
1d737c8a | 8441 | |
2df72e9b | 8442 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
34d4cb8f | 8443 | { |
6ca18b69 | 8444 | kvm_mmu_invalidate_zap_all_pages(kvm); |
34d4cb8f MT |
8445 | } |
8446 | ||
2df72e9b MT |
8447 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
8448 | struct kvm_memory_slot *slot) | |
8449 | { | |
ae7cd873 | 8450 | kvm_page_track_flush_slot(kvm, slot); |
2df72e9b MT |
8451 | } |
8452 | ||
5d9bc648 PB |
8453 | static inline bool kvm_vcpu_has_events(struct kvm_vcpu *vcpu) |
8454 | { | |
8455 | if (!list_empty_careful(&vcpu->async_pf.done)) | |
8456 | return true; | |
8457 | ||
8458 | if (kvm_apic_has_events(vcpu)) | |
8459 | return true; | |
8460 | ||
8461 | if (vcpu->arch.pv.pv_unhalted) | |
8462 | return true; | |
8463 | ||
47a66eed Z |
8464 | if (kvm_test_request(KVM_REQ_NMI, vcpu) || |
8465 | (vcpu->arch.nmi_pending && | |
8466 | kvm_x86_ops->nmi_allowed(vcpu))) | |
5d9bc648 PB |
8467 | return true; |
8468 | ||
47a66eed Z |
8469 | if (kvm_test_request(KVM_REQ_SMI, vcpu) || |
8470 | (vcpu->arch.smi_pending && !is_smm(vcpu))) | |
73917739 PB |
8471 | return true; |
8472 | ||
5d9bc648 PB |
8473 | if (kvm_arch_interrupt_allowed(vcpu) && |
8474 | kvm_cpu_has_interrupt(vcpu)) | |
8475 | return true; | |
8476 | ||
1f4b34f8 AS |
8477 | if (kvm_hv_has_stimer_pending(vcpu)) |
8478 | return true; | |
8479 | ||
5d9bc648 PB |
8480 | return false; |
8481 | } | |
8482 | ||
1d737c8a ZX |
8483 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
8484 | { | |
5d9bc648 | 8485 | return kvm_vcpu_running(vcpu) || kvm_vcpu_has_events(vcpu); |
1d737c8a | 8486 | } |
5736199a | 8487 | |
199b5763 LM |
8488 | bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu) |
8489 | { | |
de63ad4c | 8490 | return vcpu->arch.preempted_in_kernel; |
199b5763 LM |
8491 | } |
8492 | ||
b6d33834 | 8493 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
5736199a | 8494 | { |
b6d33834 | 8495 | return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; |
5736199a | 8496 | } |
78646121 GN |
8497 | |
8498 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
8499 | { | |
8500 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
8501 | } | |
229456fc | 8502 | |
82b32774 | 8503 | unsigned long kvm_get_linear_rip(struct kvm_vcpu *vcpu) |
f92653ee | 8504 | { |
82b32774 NA |
8505 | if (is_64_bit_mode(vcpu)) |
8506 | return kvm_rip_read(vcpu); | |
8507 | return (u32)(get_segment_base(vcpu, VCPU_SREG_CS) + | |
8508 | kvm_rip_read(vcpu)); | |
8509 | } | |
8510 | EXPORT_SYMBOL_GPL(kvm_get_linear_rip); | |
f92653ee | 8511 | |
82b32774 NA |
8512 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
8513 | { | |
8514 | return kvm_get_linear_rip(vcpu) == linear_rip; | |
f92653ee JK |
8515 | } |
8516 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); | |
8517 | ||
94fe45da JK |
8518 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
8519 | { | |
8520 | unsigned long rflags; | |
8521 | ||
8522 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
8523 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
c310bac5 | 8524 | rflags &= ~X86_EFLAGS_TF; |
94fe45da JK |
8525 | return rflags; |
8526 | } | |
8527 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
8528 | ||
6addfc42 | 8529 | static void __kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) |
94fe45da JK |
8530 | { |
8531 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
f92653ee | 8532 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
c310bac5 | 8533 | rflags |= X86_EFLAGS_TF; |
94fe45da | 8534 | kvm_x86_ops->set_rflags(vcpu, rflags); |
6addfc42 PB |
8535 | } |
8536 | ||
8537 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
8538 | { | |
8539 | __kvm_set_rflags(vcpu, rflags); | |
3842d135 | 8540 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
94fe45da JK |
8541 | } |
8542 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
8543 | ||
56028d08 GN |
8544 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work) |
8545 | { | |
8546 | int r; | |
8547 | ||
fb67e14f | 8548 | if ((vcpu->arch.mmu.direct_map != work->arch.direct_map) || |
f2e10669 | 8549 | work->wakeup_all) |
56028d08 GN |
8550 | return; |
8551 | ||
8552 | r = kvm_mmu_reload(vcpu); | |
8553 | if (unlikely(r)) | |
8554 | return; | |
8555 | ||
fb67e14f XG |
8556 | if (!vcpu->arch.mmu.direct_map && |
8557 | work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu)) | |
8558 | return; | |
8559 | ||
56028d08 GN |
8560 | vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true); |
8561 | } | |
8562 | ||
af585b92 GN |
8563 | static inline u32 kvm_async_pf_hash_fn(gfn_t gfn) |
8564 | { | |
8565 | return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU)); | |
8566 | } | |
8567 | ||
8568 | static inline u32 kvm_async_pf_next_probe(u32 key) | |
8569 | { | |
8570 | return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1); | |
8571 | } | |
8572 | ||
8573 | static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
8574 | { | |
8575 | u32 key = kvm_async_pf_hash_fn(gfn); | |
8576 | ||
8577 | while (vcpu->arch.apf.gfns[key] != ~0) | |
8578 | key = kvm_async_pf_next_probe(key); | |
8579 | ||
8580 | vcpu->arch.apf.gfns[key] = gfn; | |
8581 | } | |
8582 | ||
8583 | static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn) | |
8584 | { | |
8585 | int i; | |
8586 | u32 key = kvm_async_pf_hash_fn(gfn); | |
8587 | ||
8588 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) && | |
c7d28c24 XG |
8589 | (vcpu->arch.apf.gfns[key] != gfn && |
8590 | vcpu->arch.apf.gfns[key] != ~0); i++) | |
af585b92 GN |
8591 | key = kvm_async_pf_next_probe(key); |
8592 | ||
8593 | return key; | |
8594 | } | |
8595 | ||
8596 | bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
8597 | { | |
8598 | return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn; | |
8599 | } | |
8600 | ||
8601 | static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
8602 | { | |
8603 | u32 i, j, k; | |
8604 | ||
8605 | i = j = kvm_async_pf_gfn_slot(vcpu, gfn); | |
8606 | while (true) { | |
8607 | vcpu->arch.apf.gfns[i] = ~0; | |
8608 | do { | |
8609 | j = kvm_async_pf_next_probe(j); | |
8610 | if (vcpu->arch.apf.gfns[j] == ~0) | |
8611 | return; | |
8612 | k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]); | |
8613 | /* | |
8614 | * k lies cyclically in ]i,j] | |
8615 | * | i.k.j | | |
8616 | * |....j i.k.| or |.k..j i...| | |
8617 | */ | |
8618 | } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j)); | |
8619 | vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j]; | |
8620 | i = j; | |
8621 | } | |
8622 | } | |
8623 | ||
7c90705b GN |
8624 | static int apf_put_user(struct kvm_vcpu *vcpu, u32 val) |
8625 | { | |
4e335d9e PB |
8626 | |
8627 | return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val, | |
8628 | sizeof(val)); | |
7c90705b GN |
8629 | } |
8630 | ||
af585b92 GN |
8631 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
8632 | struct kvm_async_pf *work) | |
8633 | { | |
6389ee94 AK |
8634 | struct x86_exception fault; |
8635 | ||
7c90705b | 8636 | trace_kvm_async_pf_not_present(work->arch.token, work->gva); |
af585b92 | 8637 | kvm_add_async_pf_gfn(vcpu, work->arch.gfn); |
7c90705b GN |
8638 | |
8639 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) || | |
fc5f06fa GN |
8640 | (vcpu->arch.apf.send_user_only && |
8641 | kvm_x86_ops->get_cpl(vcpu) == 0)) | |
7c90705b GN |
8642 | kvm_make_request(KVM_REQ_APF_HALT, vcpu); |
8643 | else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) { | |
6389ee94 AK |
8644 | fault.vector = PF_VECTOR; |
8645 | fault.error_code_valid = true; | |
8646 | fault.error_code = 0; | |
8647 | fault.nested_page_fault = false; | |
8648 | fault.address = work->arch.token; | |
adfe20fb | 8649 | fault.async_page_fault = true; |
6389ee94 | 8650 | kvm_inject_page_fault(vcpu, &fault); |
7c90705b | 8651 | } |
af585b92 GN |
8652 | } |
8653 | ||
8654 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
8655 | struct kvm_async_pf *work) | |
8656 | { | |
6389ee94 AK |
8657 | struct x86_exception fault; |
8658 | ||
f2e10669 | 8659 | if (work->wakeup_all) |
7c90705b GN |
8660 | work->arch.token = ~0; /* broadcast wakeup */ |
8661 | else | |
8662 | kvm_del_async_pf_gfn(vcpu, work->arch.gfn); | |
24dccf83 | 8663 | trace_kvm_async_pf_ready(work->arch.token, work->gva); |
7c90705b GN |
8664 | |
8665 | if ((vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) && | |
8666 | !apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) { | |
6389ee94 AK |
8667 | fault.vector = PF_VECTOR; |
8668 | fault.error_code_valid = true; | |
8669 | fault.error_code = 0; | |
8670 | fault.nested_page_fault = false; | |
8671 | fault.address = work->arch.token; | |
adfe20fb | 8672 | fault.async_page_fault = true; |
6389ee94 | 8673 | kvm_inject_page_fault(vcpu, &fault); |
7c90705b | 8674 | } |
e6d53e3b | 8675 | vcpu->arch.apf.halted = false; |
a4fa1635 | 8676 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
7c90705b GN |
8677 | } |
8678 | ||
8679 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
8680 | { | |
8681 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED)) | |
8682 | return true; | |
8683 | else | |
9bc1f09f | 8684 | return kvm_can_do_async_pf(vcpu); |
af585b92 GN |
8685 | } |
8686 | ||
5544eb9b PB |
8687 | void kvm_arch_start_assignment(struct kvm *kvm) |
8688 | { | |
8689 | atomic_inc(&kvm->arch.assigned_device_count); | |
8690 | } | |
8691 | EXPORT_SYMBOL_GPL(kvm_arch_start_assignment); | |
8692 | ||
8693 | void kvm_arch_end_assignment(struct kvm *kvm) | |
8694 | { | |
8695 | atomic_dec(&kvm->arch.assigned_device_count); | |
8696 | } | |
8697 | EXPORT_SYMBOL_GPL(kvm_arch_end_assignment); | |
8698 | ||
8699 | bool kvm_arch_has_assigned_device(struct kvm *kvm) | |
8700 | { | |
8701 | return atomic_read(&kvm->arch.assigned_device_count); | |
8702 | } | |
8703 | EXPORT_SYMBOL_GPL(kvm_arch_has_assigned_device); | |
8704 | ||
e0f0bbc5 AW |
8705 | void kvm_arch_register_noncoherent_dma(struct kvm *kvm) |
8706 | { | |
8707 | atomic_inc(&kvm->arch.noncoherent_dma_count); | |
8708 | } | |
8709 | EXPORT_SYMBOL_GPL(kvm_arch_register_noncoherent_dma); | |
8710 | ||
8711 | void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm) | |
8712 | { | |
8713 | atomic_dec(&kvm->arch.noncoherent_dma_count); | |
8714 | } | |
8715 | EXPORT_SYMBOL_GPL(kvm_arch_unregister_noncoherent_dma); | |
8716 | ||
8717 | bool kvm_arch_has_noncoherent_dma(struct kvm *kvm) | |
8718 | { | |
8719 | return atomic_read(&kvm->arch.noncoherent_dma_count); | |
8720 | } | |
8721 | EXPORT_SYMBOL_GPL(kvm_arch_has_noncoherent_dma); | |
8722 | ||
14717e20 AW |
8723 | bool kvm_arch_has_irq_bypass(void) |
8724 | { | |
8725 | return kvm_x86_ops->update_pi_irte != NULL; | |
8726 | } | |
8727 | ||
87276880 FW |
8728 | int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons, |
8729 | struct irq_bypass_producer *prod) | |
8730 | { | |
8731 | struct kvm_kernel_irqfd *irqfd = | |
8732 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
8733 | ||
14717e20 | 8734 | irqfd->producer = prod; |
87276880 | 8735 | |
14717e20 AW |
8736 | return kvm_x86_ops->update_pi_irte(irqfd->kvm, |
8737 | prod->irq, irqfd->gsi, 1); | |
87276880 FW |
8738 | } |
8739 | ||
8740 | void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons, | |
8741 | struct irq_bypass_producer *prod) | |
8742 | { | |
8743 | int ret; | |
8744 | struct kvm_kernel_irqfd *irqfd = | |
8745 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
8746 | ||
87276880 FW |
8747 | WARN_ON(irqfd->producer != prod); |
8748 | irqfd->producer = NULL; | |
8749 | ||
8750 | /* | |
8751 | * When producer of consumer is unregistered, we change back to | |
8752 | * remapped mode, so we can re-use the current implementation | |
bb3541f1 | 8753 | * when the irq is masked/disabled or the consumer side (KVM |
87276880 FW |
8754 | * int this case doesn't want to receive the interrupts. |
8755 | */ | |
8756 | ret = kvm_x86_ops->update_pi_irte(irqfd->kvm, prod->irq, irqfd->gsi, 0); | |
8757 | if (ret) | |
8758 | printk(KERN_INFO "irq bypass consumer (token %p) unregistration" | |
8759 | " fails: %d\n", irqfd->consumer.token, ret); | |
8760 | } | |
8761 | ||
8762 | int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq, | |
8763 | uint32_t guest_irq, bool set) | |
8764 | { | |
8765 | if (!kvm_x86_ops->update_pi_irte) | |
8766 | return -EINVAL; | |
8767 | ||
8768 | return kvm_x86_ops->update_pi_irte(kvm, host_irq, guest_irq, set); | |
8769 | } | |
8770 | ||
52004014 FW |
8771 | bool kvm_vector_hashing_enabled(void) |
8772 | { | |
8773 | return vector_hashing; | |
8774 | } | |
8775 | EXPORT_SYMBOL_GPL(kvm_vector_hashing_enabled); | |
8776 | ||
229456fc | 8777 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
931c33b1 | 8778 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_fast_mmio); |
229456fc MT |
8779 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); |
8780 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
8781 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
8782 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 8783 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 8784 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 8785 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 8786 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 8787 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 8788 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
2e554e8d | 8789 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |
489223ed | 8790 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_write_tsc_offset); |
7b46268d | 8791 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ple_window); |
843e4330 | 8792 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pml_full); |
efc64404 | 8793 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pi_irte_update); |
18f40c53 SS |
8794 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_unaccelerated_access); |
8795 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_incomplete_ipi); |