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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> |
b0c39dc6 | 70 | #include <asm/mshyperv.h> |
0092e434 | 71 | #include <asm/hypervisor.h> |
043405e1 | 72 | |
d1898b73 DH |
73 | #define CREATE_TRACE_POINTS |
74 | #include "trace.h" | |
75 | ||
313a3dc7 | 76 | #define MAX_IO_MSRS 256 |
890ca9ae | 77 | #define KVM_MAX_MCE_BANKS 32 |
c45dcc71 AR |
78 | u64 __read_mostly kvm_mce_cap_supported = MCG_CTL_P | MCG_SER_P; |
79 | EXPORT_SYMBOL_GPL(kvm_mce_cap_supported); | |
890ca9ae | 80 | |
0f65dd70 AK |
81 | #define emul_to_vcpu(ctxt) \ |
82 | container_of(ctxt, struct kvm_vcpu, arch.emulate_ctxt) | |
83 | ||
50a37eb4 JR |
84 | /* EFER defaults: |
85 | * - enable syscall per default because its emulated by KVM | |
86 | * - enable LME and LMA per default on 64 bit KVM | |
87 | */ | |
88 | #ifdef CONFIG_X86_64 | |
1260edbe LJ |
89 | static |
90 | u64 __read_mostly efer_reserved_bits = ~((u64)(EFER_SCE | EFER_LME | EFER_LMA)); | |
50a37eb4 | 91 | #else |
1260edbe | 92 | static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE); |
50a37eb4 | 93 | #endif |
313a3dc7 | 94 | |
ba1389b7 AK |
95 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
96 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 97 | |
c519265f RK |
98 | #define KVM_X2APIC_API_VALID_FLAGS (KVM_X2APIC_API_USE_32BIT_IDS | \ |
99 | KVM_X2APIC_API_DISABLE_BROADCAST_QUIRK) | |
37131313 | 100 | |
cb142eb7 | 101 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
7460fb4a | 102 | static void process_nmi(struct kvm_vcpu *vcpu); |
ee2cd4b7 | 103 | static void enter_smm(struct kvm_vcpu *vcpu); |
6addfc42 | 104 | static void __kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); |
01643c51 KH |
105 | static void store_regs(struct kvm_vcpu *vcpu); |
106 | static int sync_regs(struct kvm_vcpu *vcpu); | |
674eea0f | 107 | |
893590c7 | 108 | struct kvm_x86_ops *kvm_x86_ops __read_mostly; |
5fdbf976 | 109 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 110 | |
893590c7 | 111 | static bool __read_mostly ignore_msrs = 0; |
476bc001 | 112 | module_param(ignore_msrs, bool, S_IRUGO | S_IWUSR); |
ed85c068 | 113 | |
fab0aa3b EM |
114 | static bool __read_mostly report_ignored_msrs = true; |
115 | module_param(report_ignored_msrs, bool, S_IRUGO | S_IWUSR); | |
116 | ||
9ed96e87 MT |
117 | unsigned int min_timer_period_us = 500; |
118 | module_param(min_timer_period_us, uint, S_IRUGO | S_IWUSR); | |
119 | ||
630994b3 MT |
120 | static bool __read_mostly kvmclock_periodic_sync = true; |
121 | module_param(kvmclock_periodic_sync, bool, S_IRUGO); | |
122 | ||
893590c7 | 123 | bool __read_mostly kvm_has_tsc_control; |
92a1f12d | 124 | EXPORT_SYMBOL_GPL(kvm_has_tsc_control); |
893590c7 | 125 | u32 __read_mostly kvm_max_guest_tsc_khz; |
92a1f12d | 126 | EXPORT_SYMBOL_GPL(kvm_max_guest_tsc_khz); |
bc9b961b HZ |
127 | u8 __read_mostly kvm_tsc_scaling_ratio_frac_bits; |
128 | EXPORT_SYMBOL_GPL(kvm_tsc_scaling_ratio_frac_bits); | |
129 | u64 __read_mostly kvm_max_tsc_scaling_ratio; | |
130 | EXPORT_SYMBOL_GPL(kvm_max_tsc_scaling_ratio); | |
64672c95 YJ |
131 | u64 __read_mostly kvm_default_tsc_scaling_ratio; |
132 | EXPORT_SYMBOL_GPL(kvm_default_tsc_scaling_ratio); | |
92a1f12d | 133 | |
cc578287 | 134 | /* tsc tolerance in parts per million - default to 1/2 of the NTP threshold */ |
893590c7 | 135 | static u32 __read_mostly tsc_tolerance_ppm = 250; |
cc578287 ZA |
136 | module_param(tsc_tolerance_ppm, uint, S_IRUGO | S_IWUSR); |
137 | ||
d0659d94 | 138 | /* lapic timer advance (tscdeadline mode only) in nanoseconds */ |
893590c7 | 139 | unsigned int __read_mostly lapic_timer_advance_ns = 0; |
d0659d94 MT |
140 | module_param(lapic_timer_advance_ns, uint, S_IRUGO | S_IWUSR); |
141 | ||
52004014 FW |
142 | static bool __read_mostly vector_hashing = true; |
143 | module_param(vector_hashing, bool, S_IRUGO); | |
144 | ||
c4ae60e4 LA |
145 | bool __read_mostly enable_vmware_backdoor = false; |
146 | module_param(enable_vmware_backdoor, bool, S_IRUGO); | |
147 | EXPORT_SYMBOL_GPL(enable_vmware_backdoor); | |
148 | ||
18863bdd AK |
149 | #define KVM_NR_SHARED_MSRS 16 |
150 | ||
151 | struct kvm_shared_msrs_global { | |
152 | int nr; | |
2bf78fa7 | 153 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
154 | }; |
155 | ||
156 | struct kvm_shared_msrs { | |
157 | struct user_return_notifier urn; | |
158 | bool registered; | |
2bf78fa7 SY |
159 | struct kvm_shared_msr_values { |
160 | u64 host; | |
161 | u64 curr; | |
162 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
163 | }; |
164 | ||
165 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
013f6a5d | 166 | static struct kvm_shared_msrs __percpu *shared_msrs; |
18863bdd | 167 | |
417bc304 | 168 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
169 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
170 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
171 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
172 | { "invlpg", VCPU_STAT(invlpg) }, | |
173 | { "exits", VCPU_STAT(exits) }, | |
174 | { "io_exits", VCPU_STAT(io_exits) }, | |
175 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
176 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
177 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 178 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 | 179 | { "halt_exits", VCPU_STAT(halt_exits) }, |
f7819512 | 180 | { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, |
62bea5bf | 181 | { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) }, |
3491caf2 | 182 | { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) }, |
ba1389b7 | 183 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f11c3a8d | 184 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
185 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
186 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
187 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
ba1389b7 AK |
188 | { "fpu_reload", VCPU_STAT(fpu_reload) }, |
189 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
190 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 191 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 192 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
0f1e261e | 193 | { "req_event", VCPU_STAT(req_event) }, |
4cee5764 AK |
194 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
195 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
196 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
197 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
198 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
199 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 200 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 201 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 202 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 203 | { "largepages", VM_STAT(lpages) }, |
f3414bc7 DM |
204 | { "max_mmu_page_hash_collisions", |
205 | VM_STAT(max_mmu_page_hash_collisions) }, | |
417bc304 HB |
206 | { NULL } |
207 | }; | |
208 | ||
2acf923e DC |
209 | u64 __read_mostly host_xcr0; |
210 | ||
b6785def | 211 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt); |
d6aa1000 | 212 | |
af585b92 GN |
213 | static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu) |
214 | { | |
215 | int i; | |
216 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU); i++) | |
217 | vcpu->arch.apf.gfns[i] = ~0; | |
218 | } | |
219 | ||
18863bdd AK |
220 | static void kvm_on_user_return(struct user_return_notifier *urn) |
221 | { | |
222 | unsigned slot; | |
18863bdd AK |
223 | struct kvm_shared_msrs *locals |
224 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 225 | struct kvm_shared_msr_values *values; |
1650b4eb IA |
226 | unsigned long flags; |
227 | ||
228 | /* | |
229 | * Disabling irqs at this point since the following code could be | |
230 | * interrupted and executed through kvm_arch_hardware_disable() | |
231 | */ | |
232 | local_irq_save(flags); | |
233 | if (locals->registered) { | |
234 | locals->registered = false; | |
235 | user_return_notifier_unregister(urn); | |
236 | } | |
237 | local_irq_restore(flags); | |
18863bdd | 238 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { |
2bf78fa7 SY |
239 | values = &locals->values[slot]; |
240 | if (values->host != values->curr) { | |
241 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
242 | values->curr = values->host; | |
18863bdd AK |
243 | } |
244 | } | |
18863bdd AK |
245 | } |
246 | ||
2bf78fa7 | 247 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 248 | { |
18863bdd | 249 | u64 value; |
013f6a5d MT |
250 | unsigned int cpu = smp_processor_id(); |
251 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
18863bdd | 252 | |
2bf78fa7 SY |
253 | /* only read, and nobody should modify it at this time, |
254 | * so don't need lock */ | |
255 | if (slot >= shared_msrs_global.nr) { | |
256 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
257 | return; | |
258 | } | |
259 | rdmsrl_safe(msr, &value); | |
260 | smsr->values[slot].host = value; | |
261 | smsr->values[slot].curr = value; | |
262 | } | |
263 | ||
264 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
265 | { | |
0123be42 | 266 | BUG_ON(slot >= KVM_NR_SHARED_MSRS); |
c847fe88 | 267 | shared_msrs_global.msrs[slot] = msr; |
18863bdd AK |
268 | if (slot >= shared_msrs_global.nr) |
269 | shared_msrs_global.nr = slot + 1; | |
18863bdd AK |
270 | } |
271 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
272 | ||
273 | static void kvm_shared_msr_cpu_online(void) | |
274 | { | |
275 | unsigned i; | |
18863bdd AK |
276 | |
277 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 278 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
279 | } |
280 | ||
8b3c3104 | 281 | int kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd | 282 | { |
013f6a5d MT |
283 | unsigned int cpu = smp_processor_id(); |
284 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
8b3c3104 | 285 | int err; |
18863bdd | 286 | |
2bf78fa7 | 287 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
8b3c3104 | 288 | return 0; |
2bf78fa7 | 289 | smsr->values[slot].curr = value; |
8b3c3104 AH |
290 | err = wrmsrl_safe(shared_msrs_global.msrs[slot], value); |
291 | if (err) | |
292 | return 1; | |
293 | ||
18863bdd AK |
294 | if (!smsr->registered) { |
295 | smsr->urn.on_user_return = kvm_on_user_return; | |
296 | user_return_notifier_register(&smsr->urn); | |
297 | smsr->registered = true; | |
298 | } | |
8b3c3104 | 299 | return 0; |
18863bdd AK |
300 | } |
301 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
302 | ||
13a34e06 | 303 | static void drop_user_return_notifiers(void) |
3548bab5 | 304 | { |
013f6a5d MT |
305 | unsigned int cpu = smp_processor_id(); |
306 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
3548bab5 AK |
307 | |
308 | if (smsr->registered) | |
309 | kvm_on_user_return(&smsr->urn); | |
310 | } | |
311 | ||
6866b83e CO |
312 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
313 | { | |
8a5a87d9 | 314 | return vcpu->arch.apic_base; |
6866b83e CO |
315 | } |
316 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
317 | ||
58cb628d JK |
318 | int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
319 | { | |
320 | u64 old_state = vcpu->arch.apic_base & | |
321 | (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); | |
322 | u64 new_state = msr_info->data & | |
323 | (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); | |
d6321d49 RK |
324 | u64 reserved_bits = ((~0ULL) << cpuid_maxphyaddr(vcpu)) | 0x2ff | |
325 | (guest_cpuid_has(vcpu, X86_FEATURE_X2APIC) ? 0 : X2APIC_ENABLE); | |
58cb628d | 326 | |
d3802286 JM |
327 | if ((msr_info->data & reserved_bits) || new_state == X2APIC_ENABLE) |
328 | return 1; | |
58cb628d | 329 | if (!msr_info->host_initiated && |
d3802286 | 330 | ((new_state == MSR_IA32_APICBASE_ENABLE && |
58cb628d JK |
331 | old_state == (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE)) || |
332 | (new_state == (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE) && | |
333 | old_state == 0))) | |
334 | return 1; | |
335 | ||
336 | kvm_lapic_set_base(vcpu, msr_info->data); | |
337 | return 0; | |
6866b83e CO |
338 | } |
339 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
340 | ||
2605fc21 | 341 | asmlinkage __visible void kvm_spurious_fault(void) |
e3ba45b8 GL |
342 | { |
343 | /* Fault while not rebooting. We want the trace. */ | |
344 | BUG(); | |
345 | } | |
346 | EXPORT_SYMBOL_GPL(kvm_spurious_fault); | |
347 | ||
3fd28fce ED |
348 | #define EXCPT_BENIGN 0 |
349 | #define EXCPT_CONTRIBUTORY 1 | |
350 | #define EXCPT_PF 2 | |
351 | ||
352 | static int exception_class(int vector) | |
353 | { | |
354 | switch (vector) { | |
355 | case PF_VECTOR: | |
356 | return EXCPT_PF; | |
357 | case DE_VECTOR: | |
358 | case TS_VECTOR: | |
359 | case NP_VECTOR: | |
360 | case SS_VECTOR: | |
361 | case GP_VECTOR: | |
362 | return EXCPT_CONTRIBUTORY; | |
363 | default: | |
364 | break; | |
365 | } | |
366 | return EXCPT_BENIGN; | |
367 | } | |
368 | ||
d6e8c854 NA |
369 | #define EXCPT_FAULT 0 |
370 | #define EXCPT_TRAP 1 | |
371 | #define EXCPT_ABORT 2 | |
372 | #define EXCPT_INTERRUPT 3 | |
373 | ||
374 | static int exception_type(int vector) | |
375 | { | |
376 | unsigned int mask; | |
377 | ||
378 | if (WARN_ON(vector > 31 || vector == NMI_VECTOR)) | |
379 | return EXCPT_INTERRUPT; | |
380 | ||
381 | mask = 1 << vector; | |
382 | ||
383 | /* #DB is trap, as instruction watchpoints are handled elsewhere */ | |
384 | if (mask & ((1 << DB_VECTOR) | (1 << BP_VECTOR) | (1 << OF_VECTOR))) | |
385 | return EXCPT_TRAP; | |
386 | ||
387 | if (mask & ((1 << DF_VECTOR) | (1 << MC_VECTOR))) | |
388 | return EXCPT_ABORT; | |
389 | ||
390 | /* Reserved exceptions will result in fault */ | |
391 | return EXCPT_FAULT; | |
392 | } | |
393 | ||
3fd28fce | 394 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, |
ce7ddec4 JR |
395 | unsigned nr, bool has_error, u32 error_code, |
396 | bool reinject) | |
3fd28fce ED |
397 | { |
398 | u32 prev_nr; | |
399 | int class1, class2; | |
400 | ||
3842d135 AK |
401 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
402 | ||
664f8e26 | 403 | if (!vcpu->arch.exception.pending && !vcpu->arch.exception.injected) { |
3fd28fce | 404 | queue: |
3ffb2468 NA |
405 | if (has_error && !is_protmode(vcpu)) |
406 | has_error = false; | |
664f8e26 WL |
407 | if (reinject) { |
408 | /* | |
409 | * On vmentry, vcpu->arch.exception.pending is only | |
410 | * true if an event injection was blocked by | |
411 | * nested_run_pending. In that case, however, | |
412 | * vcpu_enter_guest requests an immediate exit, | |
413 | * and the guest shouldn't proceed far enough to | |
414 | * need reinjection. | |
415 | */ | |
416 | WARN_ON_ONCE(vcpu->arch.exception.pending); | |
417 | vcpu->arch.exception.injected = true; | |
418 | } else { | |
419 | vcpu->arch.exception.pending = true; | |
420 | vcpu->arch.exception.injected = false; | |
421 | } | |
3fd28fce ED |
422 | vcpu->arch.exception.has_error_code = has_error; |
423 | vcpu->arch.exception.nr = nr; | |
424 | vcpu->arch.exception.error_code = error_code; | |
425 | return; | |
426 | } | |
427 | ||
428 | /* to check exception */ | |
429 | prev_nr = vcpu->arch.exception.nr; | |
430 | if (prev_nr == DF_VECTOR) { | |
431 | /* triple fault -> shutdown */ | |
a8eeb04a | 432 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
3fd28fce ED |
433 | return; |
434 | } | |
435 | class1 = exception_class(prev_nr); | |
436 | class2 = exception_class(nr); | |
437 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
438 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
664f8e26 WL |
439 | /* |
440 | * Generate double fault per SDM Table 5-5. Set | |
441 | * exception.pending = true so that the double fault | |
442 | * can trigger a nested vmexit. | |
443 | */ | |
3fd28fce | 444 | vcpu->arch.exception.pending = true; |
664f8e26 | 445 | vcpu->arch.exception.injected = false; |
3fd28fce ED |
446 | vcpu->arch.exception.has_error_code = true; |
447 | vcpu->arch.exception.nr = DF_VECTOR; | |
448 | vcpu->arch.exception.error_code = 0; | |
449 | } else | |
450 | /* replace previous exception with a new one in a hope | |
451 | that instruction re-execution will regenerate lost | |
452 | exception */ | |
453 | goto queue; | |
454 | } | |
455 | ||
298101da AK |
456 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
457 | { | |
ce7ddec4 | 458 | kvm_multiple_exception(vcpu, nr, false, 0, false); |
298101da AK |
459 | } |
460 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
461 | ||
ce7ddec4 JR |
462 | void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
463 | { | |
464 | kvm_multiple_exception(vcpu, nr, false, 0, true); | |
465 | } | |
466 | EXPORT_SYMBOL_GPL(kvm_requeue_exception); | |
467 | ||
6affcbed | 468 | int kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err) |
c3c91fee | 469 | { |
db8fcefa AP |
470 | if (err) |
471 | kvm_inject_gp(vcpu, 0); | |
472 | else | |
6affcbed KH |
473 | return kvm_skip_emulated_instruction(vcpu); |
474 | ||
475 | return 1; | |
db8fcefa AP |
476 | } |
477 | EXPORT_SYMBOL_GPL(kvm_complete_insn_gp); | |
8df25a32 | 478 | |
6389ee94 | 479 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
c3c91fee AK |
480 | { |
481 | ++vcpu->stat.pf_guest; | |
adfe20fb WL |
482 | vcpu->arch.exception.nested_apf = |
483 | is_guest_mode(vcpu) && fault->async_page_fault; | |
484 | if (vcpu->arch.exception.nested_apf) | |
485 | vcpu->arch.apf.nested_apf_token = fault->address; | |
486 | else | |
487 | vcpu->arch.cr2 = fault->address; | |
6389ee94 | 488 | kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code); |
c3c91fee | 489 | } |
27d6c865 | 490 | EXPORT_SYMBOL_GPL(kvm_inject_page_fault); |
c3c91fee | 491 | |
ef54bcfe | 492 | static bool kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
d4f8cf66 | 493 | { |
6389ee94 AK |
494 | if (mmu_is_nested(vcpu) && !fault->nested_page_fault) |
495 | vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault); | |
d4f8cf66 | 496 | else |
6389ee94 | 497 | vcpu->arch.mmu.inject_page_fault(vcpu, fault); |
ef54bcfe PB |
498 | |
499 | return fault->nested_page_fault; | |
d4f8cf66 JR |
500 | } |
501 | ||
3419ffc8 SY |
502 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
503 | { | |
7460fb4a AK |
504 | atomic_inc(&vcpu->arch.nmi_queued); |
505 | kvm_make_request(KVM_REQ_NMI, vcpu); | |
3419ffc8 SY |
506 | } |
507 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
508 | ||
298101da AK |
509 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
510 | { | |
ce7ddec4 | 511 | kvm_multiple_exception(vcpu, nr, true, error_code, false); |
298101da AK |
512 | } |
513 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
514 | ||
ce7ddec4 JR |
515 | void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
516 | { | |
517 | kvm_multiple_exception(vcpu, nr, true, error_code, true); | |
518 | } | |
519 | EXPORT_SYMBOL_GPL(kvm_requeue_exception_e); | |
520 | ||
0a79b009 AK |
521 | /* |
522 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
523 | * a #GP and return false. | |
524 | */ | |
525 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 526 | { |
0a79b009 AK |
527 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
528 | return true; | |
529 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
530 | return false; | |
298101da | 531 | } |
0a79b009 | 532 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 533 | |
16f8a6f9 NA |
534 | bool kvm_require_dr(struct kvm_vcpu *vcpu, int dr) |
535 | { | |
536 | if ((dr != 4 && dr != 5) || !kvm_read_cr4_bits(vcpu, X86_CR4_DE)) | |
537 | return true; | |
538 | ||
539 | kvm_queue_exception(vcpu, UD_VECTOR); | |
540 | return false; | |
541 | } | |
542 | EXPORT_SYMBOL_GPL(kvm_require_dr); | |
543 | ||
ec92fe44 JR |
544 | /* |
545 | * This function will be used to read from the physical memory of the currently | |
54bf36aa | 546 | * running guest. The difference to kvm_vcpu_read_guest_page is that this function |
ec92fe44 JR |
547 | * can read from guest physical or from the guest's guest physical memory. |
548 | */ | |
549 | int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, | |
550 | gfn_t ngfn, void *data, int offset, int len, | |
551 | u32 access) | |
552 | { | |
54987b7a | 553 | struct x86_exception exception; |
ec92fe44 JR |
554 | gfn_t real_gfn; |
555 | gpa_t ngpa; | |
556 | ||
557 | ngpa = gfn_to_gpa(ngfn); | |
54987b7a | 558 | real_gfn = mmu->translate_gpa(vcpu, ngpa, access, &exception); |
ec92fe44 JR |
559 | if (real_gfn == UNMAPPED_GVA) |
560 | return -EFAULT; | |
561 | ||
562 | real_gfn = gpa_to_gfn(real_gfn); | |
563 | ||
54bf36aa | 564 | return kvm_vcpu_read_guest_page(vcpu, real_gfn, data, offset, len); |
ec92fe44 JR |
565 | } |
566 | EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu); | |
567 | ||
69b0049a | 568 | static int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, |
3d06b8bf JR |
569 | void *data, int offset, int len, u32 access) |
570 | { | |
571 | return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn, | |
572 | data, offset, len, access); | |
573 | } | |
574 | ||
a03490ed CO |
575 | /* |
576 | * Load the pae pdptrs. Return true is they are all valid. | |
577 | */ | |
ff03a073 | 578 | int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3) |
a03490ed CO |
579 | { |
580 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
581 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
582 | int i; | |
583 | int ret; | |
ff03a073 | 584 | u64 pdpte[ARRAY_SIZE(mmu->pdptrs)]; |
a03490ed | 585 | |
ff03a073 JR |
586 | ret = kvm_read_guest_page_mmu(vcpu, mmu, pdpt_gfn, pdpte, |
587 | offset * sizeof(u64), sizeof(pdpte), | |
588 | PFERR_USER_MASK|PFERR_WRITE_MASK); | |
a03490ed CO |
589 | if (ret < 0) { |
590 | ret = 0; | |
591 | goto out; | |
592 | } | |
593 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
812f30b2 | 594 | if ((pdpte[i] & PT_PRESENT_MASK) && |
a0a64f50 XG |
595 | (pdpte[i] & |
596 | vcpu->arch.mmu.guest_rsvd_check.rsvd_bits_mask[0][2])) { | |
a03490ed CO |
597 | ret = 0; |
598 | goto out; | |
599 | } | |
600 | } | |
601 | ret = 1; | |
602 | ||
ff03a073 | 603 | memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs)); |
6de4f3ad AK |
604 | __set_bit(VCPU_EXREG_PDPTR, |
605 | (unsigned long *)&vcpu->arch.regs_avail); | |
606 | __set_bit(VCPU_EXREG_PDPTR, | |
607 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 608 | out: |
a03490ed CO |
609 | |
610 | return ret; | |
611 | } | |
cc4b6871 | 612 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 613 | |
9ed38ffa | 614 | bool pdptrs_changed(struct kvm_vcpu *vcpu) |
d835dfec | 615 | { |
ff03a073 | 616 | u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)]; |
d835dfec | 617 | bool changed = true; |
3d06b8bf JR |
618 | int offset; |
619 | gfn_t gfn; | |
d835dfec AK |
620 | int r; |
621 | ||
622 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
623 | return false; | |
624 | ||
6de4f3ad AK |
625 | if (!test_bit(VCPU_EXREG_PDPTR, |
626 | (unsigned long *)&vcpu->arch.regs_avail)) | |
627 | return true; | |
628 | ||
a512177e PB |
629 | gfn = (kvm_read_cr3(vcpu) & 0xffffffe0ul) >> PAGE_SHIFT; |
630 | offset = (kvm_read_cr3(vcpu) & 0xffffffe0ul) & (PAGE_SIZE - 1); | |
3d06b8bf JR |
631 | r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte), |
632 | PFERR_USER_MASK | PFERR_WRITE_MASK); | |
d835dfec AK |
633 | if (r < 0) |
634 | goto out; | |
ff03a073 | 635 | changed = memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 636 | out: |
d835dfec AK |
637 | |
638 | return changed; | |
639 | } | |
9ed38ffa | 640 | EXPORT_SYMBOL_GPL(pdptrs_changed); |
d835dfec | 641 | |
49a9b07e | 642 | int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed | 643 | { |
aad82703 | 644 | unsigned long old_cr0 = kvm_read_cr0(vcpu); |
d81135a5 | 645 | unsigned long update_bits = X86_CR0_PG | X86_CR0_WP; |
aad82703 | 646 | |
f9a48e6a AK |
647 | cr0 |= X86_CR0_ET; |
648 | ||
ab344828 | 649 | #ifdef CONFIG_X86_64 |
0f12244f GN |
650 | if (cr0 & 0xffffffff00000000UL) |
651 | return 1; | |
ab344828 GN |
652 | #endif |
653 | ||
654 | cr0 &= ~CR0_RESERVED_BITS; | |
a03490ed | 655 | |
0f12244f GN |
656 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) |
657 | return 1; | |
a03490ed | 658 | |
0f12244f GN |
659 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) |
660 | return 1; | |
a03490ed CO |
661 | |
662 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
663 | #ifdef CONFIG_X86_64 | |
f6801dff | 664 | if ((vcpu->arch.efer & EFER_LME)) { |
a03490ed CO |
665 | int cs_db, cs_l; |
666 | ||
0f12244f GN |
667 | if (!is_pae(vcpu)) |
668 | return 1; | |
a03490ed | 669 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
0f12244f GN |
670 | if (cs_l) |
671 | return 1; | |
a03490ed CO |
672 | } else |
673 | #endif | |
ff03a073 | 674 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
9f8fe504 | 675 | kvm_read_cr3(vcpu))) |
0f12244f | 676 | return 1; |
a03490ed CO |
677 | } |
678 | ||
ad756a16 MJ |
679 | if (!(cr0 & X86_CR0_PG) && kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE)) |
680 | return 1; | |
681 | ||
a03490ed | 682 | kvm_x86_ops->set_cr0(vcpu, cr0); |
a03490ed | 683 | |
d170c419 | 684 | if ((cr0 ^ old_cr0) & X86_CR0_PG) { |
e5f3f027 | 685 | kvm_clear_async_pf_completion_queue(vcpu); |
d170c419 LJ |
686 | kvm_async_pf_hash_reset(vcpu); |
687 | } | |
e5f3f027 | 688 | |
aad82703 SY |
689 | if ((cr0 ^ old_cr0) & update_bits) |
690 | kvm_mmu_reset_context(vcpu); | |
b18d5431 | 691 | |
879ae188 LE |
692 | if (((cr0 ^ old_cr0) & X86_CR0_CD) && |
693 | kvm_arch_has_noncoherent_dma(vcpu->kvm) && | |
694 | !kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED)) | |
b18d5431 XG |
695 | kvm_zap_gfn_range(vcpu->kvm, 0, ~0ULL); |
696 | ||
0f12244f GN |
697 | return 0; |
698 | } | |
2d3ad1f4 | 699 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 700 | |
2d3ad1f4 | 701 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 702 | { |
49a9b07e | 703 | (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f)); |
a03490ed | 704 | } |
2d3ad1f4 | 705 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 706 | |
42bdf991 MT |
707 | static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu) |
708 | { | |
709 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) && | |
710 | !vcpu->guest_xcr0_loaded) { | |
711 | /* kvm_set_xcr() also depends on this */ | |
476b7ada PB |
712 | if (vcpu->arch.xcr0 != host_xcr0) |
713 | xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0); | |
42bdf991 MT |
714 | vcpu->guest_xcr0_loaded = 1; |
715 | } | |
716 | } | |
717 | ||
718 | static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu) | |
719 | { | |
720 | if (vcpu->guest_xcr0_loaded) { | |
721 | if (vcpu->arch.xcr0 != host_xcr0) | |
722 | xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0); | |
723 | vcpu->guest_xcr0_loaded = 0; | |
724 | } | |
725 | } | |
726 | ||
69b0049a | 727 | static int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) |
2acf923e | 728 | { |
56c103ec LJ |
729 | u64 xcr0 = xcr; |
730 | u64 old_xcr0 = vcpu->arch.xcr0; | |
46c34cb0 | 731 | u64 valid_bits; |
2acf923e DC |
732 | |
733 | /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */ | |
734 | if (index != XCR_XFEATURE_ENABLED_MASK) | |
735 | return 1; | |
d91cab78 | 736 | if (!(xcr0 & XFEATURE_MASK_FP)) |
2acf923e | 737 | return 1; |
d91cab78 | 738 | if ((xcr0 & XFEATURE_MASK_YMM) && !(xcr0 & XFEATURE_MASK_SSE)) |
2acf923e | 739 | return 1; |
46c34cb0 PB |
740 | |
741 | /* | |
742 | * Do not allow the guest to set bits that we do not support | |
743 | * saving. However, xcr0 bit 0 is always set, even if the | |
744 | * emulated CPU does not support XSAVE (see fx_init). | |
745 | */ | |
d91cab78 | 746 | valid_bits = vcpu->arch.guest_supported_xcr0 | XFEATURE_MASK_FP; |
46c34cb0 | 747 | if (xcr0 & ~valid_bits) |
2acf923e | 748 | return 1; |
46c34cb0 | 749 | |
d91cab78 DH |
750 | if ((!(xcr0 & XFEATURE_MASK_BNDREGS)) != |
751 | (!(xcr0 & XFEATURE_MASK_BNDCSR))) | |
390bd528 LJ |
752 | return 1; |
753 | ||
d91cab78 DH |
754 | if (xcr0 & XFEATURE_MASK_AVX512) { |
755 | if (!(xcr0 & XFEATURE_MASK_YMM)) | |
612263b3 | 756 | return 1; |
d91cab78 | 757 | if ((xcr0 & XFEATURE_MASK_AVX512) != XFEATURE_MASK_AVX512) |
612263b3 CP |
758 | return 1; |
759 | } | |
2acf923e | 760 | vcpu->arch.xcr0 = xcr0; |
56c103ec | 761 | |
d91cab78 | 762 | if ((xcr0 ^ old_xcr0) & XFEATURE_MASK_EXTEND) |
56c103ec | 763 | kvm_update_cpuid(vcpu); |
2acf923e DC |
764 | return 0; |
765 | } | |
766 | ||
767 | int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) | |
768 | { | |
764bcbc5 Z |
769 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || |
770 | __kvm_set_xcr(vcpu, index, xcr)) { | |
2acf923e DC |
771 | kvm_inject_gp(vcpu, 0); |
772 | return 1; | |
773 | } | |
774 | return 0; | |
775 | } | |
776 | EXPORT_SYMBOL_GPL(kvm_set_xcr); | |
777 | ||
a83b29c6 | 778 | int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 779 | { |
fc78f519 | 780 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
0be0226f | 781 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE | |
b9baba86 | 782 | X86_CR4_SMEP | X86_CR4_SMAP | X86_CR4_PKE; |
0be0226f | 783 | |
0f12244f GN |
784 | if (cr4 & CR4_RESERVED_BITS) |
785 | return 1; | |
a03490ed | 786 | |
d6321d49 | 787 | if (!guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) && (cr4 & X86_CR4_OSXSAVE)) |
2acf923e DC |
788 | return 1; |
789 | ||
d6321d49 | 790 | if (!guest_cpuid_has(vcpu, X86_FEATURE_SMEP) && (cr4 & X86_CR4_SMEP)) |
2acf923e DC |
791 | return 1; |
792 | ||
d6321d49 | 793 | if (!guest_cpuid_has(vcpu, X86_FEATURE_SMAP) && (cr4 & X86_CR4_SMAP)) |
c68b734f YW |
794 | return 1; |
795 | ||
d6321d49 | 796 | if (!guest_cpuid_has(vcpu, X86_FEATURE_FSGSBASE) && (cr4 & X86_CR4_FSGSBASE)) |
97ec8c06 FW |
797 | return 1; |
798 | ||
d6321d49 | 799 | if (!guest_cpuid_has(vcpu, X86_FEATURE_PKU) && (cr4 & X86_CR4_PKE)) |
74dc2b4f YW |
800 | return 1; |
801 | ||
fd8cb433 | 802 | if (!guest_cpuid_has(vcpu, X86_FEATURE_LA57) && (cr4 & X86_CR4_LA57)) |
b9baba86 HH |
803 | return 1; |
804 | ||
ae3e61e1 PB |
805 | if (!guest_cpuid_has(vcpu, X86_FEATURE_UMIP) && (cr4 & X86_CR4_UMIP)) |
806 | return 1; | |
807 | ||
a03490ed | 808 | if (is_long_mode(vcpu)) { |
0f12244f GN |
809 | if (!(cr4 & X86_CR4_PAE)) |
810 | return 1; | |
a2edf57f AK |
811 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
812 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
9f8fe504 AK |
813 | && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
814 | kvm_read_cr3(vcpu))) | |
0f12244f GN |
815 | return 1; |
816 | ||
ad756a16 | 817 | if ((cr4 & X86_CR4_PCIDE) && !(old_cr4 & X86_CR4_PCIDE)) { |
d6321d49 | 818 | if (!guest_cpuid_has(vcpu, X86_FEATURE_PCID)) |
ad756a16 MJ |
819 | return 1; |
820 | ||
821 | /* PCID can not be enabled when cr3[11:0]!=000H or EFER.LMA=0 */ | |
822 | if ((kvm_read_cr3(vcpu) & X86_CR3_PCID_MASK) || !is_long_mode(vcpu)) | |
823 | return 1; | |
824 | } | |
825 | ||
5e1746d6 | 826 | if (kvm_x86_ops->set_cr4(vcpu, cr4)) |
0f12244f | 827 | return 1; |
a03490ed | 828 | |
ad756a16 MJ |
829 | if (((cr4 ^ old_cr4) & pdptr_bits) || |
830 | (!(cr4 & X86_CR4_PCIDE) && (old_cr4 & X86_CR4_PCIDE))) | |
aad82703 | 831 | kvm_mmu_reset_context(vcpu); |
0f12244f | 832 | |
b9baba86 | 833 | if ((cr4 ^ old_cr4) & (X86_CR4_OSXSAVE | X86_CR4_PKE)) |
00b27a3e | 834 | kvm_update_cpuid(vcpu); |
2acf923e | 835 | |
0f12244f GN |
836 | return 0; |
837 | } | |
2d3ad1f4 | 838 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 839 | |
2390218b | 840 | int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 841 | { |
ac146235 | 842 | #ifdef CONFIG_X86_64 |
9d88fca7 | 843 | cr3 &= ~CR3_PCID_INVD; |
ac146235 | 844 | #endif |
9d88fca7 | 845 | |
9f8fe504 | 846 | if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) { |
0ba73cda | 847 | kvm_mmu_sync_roots(vcpu); |
77c3913b | 848 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
0f12244f | 849 | return 0; |
d835dfec AK |
850 | } |
851 | ||
d1cd3ce9 YZ |
852 | if (is_long_mode(vcpu) && |
853 | (cr3 & rsvd_bits(cpuid_maxphyaddr(vcpu), 62))) | |
854 | return 1; | |
855 | else if (is_pae(vcpu) && is_paging(vcpu) && | |
d9f89b88 | 856 | !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) |
346874c9 | 857 | return 1; |
a03490ed | 858 | |
0f12244f | 859 | vcpu->arch.cr3 = cr3; |
aff48baa | 860 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
d8d173da | 861 | kvm_mmu_new_cr3(vcpu); |
0f12244f GN |
862 | return 0; |
863 | } | |
2d3ad1f4 | 864 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 865 | |
eea1cff9 | 866 | int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed | 867 | { |
0f12244f GN |
868 | if (cr8 & CR8_RESERVED_BITS) |
869 | return 1; | |
35754c98 | 870 | if (lapic_in_kernel(vcpu)) |
a03490ed CO |
871 | kvm_lapic_set_tpr(vcpu, cr8); |
872 | else | |
ad312c7c | 873 | vcpu->arch.cr8 = cr8; |
0f12244f GN |
874 | return 0; |
875 | } | |
2d3ad1f4 | 876 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 877 | |
2d3ad1f4 | 878 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed | 879 | { |
35754c98 | 880 | if (lapic_in_kernel(vcpu)) |
a03490ed CO |
881 | return kvm_lapic_get_cr8(vcpu); |
882 | else | |
ad312c7c | 883 | return vcpu->arch.cr8; |
a03490ed | 884 | } |
2d3ad1f4 | 885 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 886 | |
ae561ede NA |
887 | static void kvm_update_dr0123(struct kvm_vcpu *vcpu) |
888 | { | |
889 | int i; | |
890 | ||
891 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) { | |
892 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
893 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
894 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_RELOAD; | |
895 | } | |
896 | } | |
897 | ||
73aaf249 JK |
898 | static void kvm_update_dr6(struct kvm_vcpu *vcpu) |
899 | { | |
900 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
901 | kvm_x86_ops->set_dr6(vcpu, vcpu->arch.dr6); | |
902 | } | |
903 | ||
c8639010 JK |
904 | static void kvm_update_dr7(struct kvm_vcpu *vcpu) |
905 | { | |
906 | unsigned long dr7; | |
907 | ||
908 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) | |
909 | dr7 = vcpu->arch.guest_debug_dr7; | |
910 | else | |
911 | dr7 = vcpu->arch.dr7; | |
912 | kvm_x86_ops->set_dr7(vcpu, dr7); | |
360b948d PB |
913 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_BP_ENABLED; |
914 | if (dr7 & DR7_BP_EN_MASK) | |
915 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_BP_ENABLED; | |
c8639010 JK |
916 | } |
917 | ||
6f43ed01 NA |
918 | static u64 kvm_dr6_fixed(struct kvm_vcpu *vcpu) |
919 | { | |
920 | u64 fixed = DR6_FIXED_1; | |
921 | ||
d6321d49 | 922 | if (!guest_cpuid_has(vcpu, X86_FEATURE_RTM)) |
6f43ed01 NA |
923 | fixed |= DR6_RTM; |
924 | return fixed; | |
925 | } | |
926 | ||
338dbc97 | 927 | static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
020df079 GN |
928 | { |
929 | switch (dr) { | |
930 | case 0 ... 3: | |
931 | vcpu->arch.db[dr] = val; | |
932 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
933 | vcpu->arch.eff_db[dr] = val; | |
934 | break; | |
935 | case 4: | |
020df079 GN |
936 | /* fall through */ |
937 | case 6: | |
338dbc97 GN |
938 | if (val & 0xffffffff00000000ULL) |
939 | return -1; /* #GP */ | |
6f43ed01 | 940 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | kvm_dr6_fixed(vcpu); |
73aaf249 | 941 | kvm_update_dr6(vcpu); |
020df079 GN |
942 | break; |
943 | case 5: | |
020df079 GN |
944 | /* fall through */ |
945 | default: /* 7 */ | |
338dbc97 GN |
946 | if (val & 0xffffffff00000000ULL) |
947 | return -1; /* #GP */ | |
020df079 | 948 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; |
c8639010 | 949 | kvm_update_dr7(vcpu); |
020df079 GN |
950 | break; |
951 | } | |
952 | ||
953 | return 0; | |
954 | } | |
338dbc97 GN |
955 | |
956 | int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) | |
957 | { | |
16f8a6f9 | 958 | if (__kvm_set_dr(vcpu, dr, val)) { |
338dbc97 | 959 | kvm_inject_gp(vcpu, 0); |
16f8a6f9 NA |
960 | return 1; |
961 | } | |
962 | return 0; | |
338dbc97 | 963 | } |
020df079 GN |
964 | EXPORT_SYMBOL_GPL(kvm_set_dr); |
965 | ||
16f8a6f9 | 966 | int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) |
020df079 GN |
967 | { |
968 | switch (dr) { | |
969 | case 0 ... 3: | |
970 | *val = vcpu->arch.db[dr]; | |
971 | break; | |
972 | case 4: | |
020df079 GN |
973 | /* fall through */ |
974 | case 6: | |
73aaf249 JK |
975 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
976 | *val = vcpu->arch.dr6; | |
977 | else | |
978 | *val = kvm_x86_ops->get_dr6(vcpu); | |
020df079 GN |
979 | break; |
980 | case 5: | |
020df079 GN |
981 | /* fall through */ |
982 | default: /* 7 */ | |
983 | *val = vcpu->arch.dr7; | |
984 | break; | |
985 | } | |
338dbc97 GN |
986 | return 0; |
987 | } | |
020df079 GN |
988 | EXPORT_SYMBOL_GPL(kvm_get_dr); |
989 | ||
022cd0e8 AK |
990 | bool kvm_rdpmc(struct kvm_vcpu *vcpu) |
991 | { | |
992 | u32 ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
993 | u64 data; | |
994 | int err; | |
995 | ||
c6702c9d | 996 | err = kvm_pmu_rdpmc(vcpu, ecx, &data); |
022cd0e8 AK |
997 | if (err) |
998 | return err; | |
999 | kvm_register_write(vcpu, VCPU_REGS_RAX, (u32)data); | |
1000 | kvm_register_write(vcpu, VCPU_REGS_RDX, data >> 32); | |
1001 | return err; | |
1002 | } | |
1003 | EXPORT_SYMBOL_GPL(kvm_rdpmc); | |
1004 | ||
043405e1 CO |
1005 | /* |
1006 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
1007 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
1008 | * | |
1009 | * This list is modified at module load time to reflect the | |
e3267cbb | 1010 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
62ef68bb PB |
1011 | * kvm-specific. Those are put in emulated_msrs; filtering of emulated_msrs |
1012 | * may depend on host virtualization features rather than host cpu features. | |
043405e1 | 1013 | */ |
e3267cbb | 1014 | |
043405e1 CO |
1015 | static u32 msrs_to_save[] = { |
1016 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
8c06585d | 1017 | MSR_STAR, |
043405e1 CO |
1018 | #ifdef CONFIG_X86_64 |
1019 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
1020 | #endif | |
b3897a49 | 1021 | MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA, |
9dbe6cf9 | 1022 | MSR_IA32_FEATURE_CONTROL, MSR_IA32_BNDCFGS, MSR_TSC_AUX, |
d28b387f | 1023 | MSR_IA32_SPEC_CTRL, MSR_IA32_ARCH_CAPABILITIES |
043405e1 CO |
1024 | }; |
1025 | ||
1026 | static unsigned num_msrs_to_save; | |
1027 | ||
62ef68bb PB |
1028 | static u32 emulated_msrs[] = { |
1029 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, | |
1030 | MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW, | |
1031 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, | |
1032 | HV_X64_MSR_TIME_REF_COUNT, HV_X64_MSR_REFERENCE_TSC, | |
72c139ba | 1033 | HV_X64_MSR_TSC_FREQUENCY, HV_X64_MSR_APIC_FREQUENCY, |
e7d9513b AS |
1034 | HV_X64_MSR_CRASH_P0, HV_X64_MSR_CRASH_P1, HV_X64_MSR_CRASH_P2, |
1035 | HV_X64_MSR_CRASH_P3, HV_X64_MSR_CRASH_P4, HV_X64_MSR_CRASH_CTL, | |
e516cebb | 1036 | HV_X64_MSR_RESET, |
11c4b1ca | 1037 | HV_X64_MSR_VP_INDEX, |
9eec50b8 | 1038 | HV_X64_MSR_VP_RUNTIME, |
5c919412 | 1039 | HV_X64_MSR_SCONTROL, |
1f4b34f8 | 1040 | HV_X64_MSR_STIMER0_CONFIG, |
a2e164e7 VK |
1041 | HV_X64_MSR_APIC_ASSIST_PAGE, |
1042 | HV_X64_MSR_REENLIGHTENMENT_CONTROL, HV_X64_MSR_TSC_EMULATION_CONTROL, | |
1043 | HV_X64_MSR_TSC_EMULATION_STATUS, | |
1044 | ||
1045 | MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME, | |
62ef68bb PB |
1046 | MSR_KVM_PV_EOI_EN, |
1047 | ||
ba904635 | 1048 | MSR_IA32_TSC_ADJUST, |
a3e06bbe | 1049 | MSR_IA32_TSCDEADLINE, |
043405e1 | 1050 | MSR_IA32_MISC_ENABLE, |
908e75f3 AK |
1051 | MSR_IA32_MCG_STATUS, |
1052 | MSR_IA32_MCG_CTL, | |
c45dcc71 | 1053 | MSR_IA32_MCG_EXT_CTL, |
64d60670 | 1054 | MSR_IA32_SMBASE, |
52797bf9 | 1055 | MSR_SMI_COUNT, |
db2336a8 KH |
1056 | MSR_PLATFORM_INFO, |
1057 | MSR_MISC_FEATURES_ENABLES, | |
043405e1 CO |
1058 | }; |
1059 | ||
62ef68bb PB |
1060 | static unsigned num_emulated_msrs; |
1061 | ||
801e459a TL |
1062 | /* |
1063 | * List of msr numbers which are used to expose MSR-based features that | |
1064 | * can be used by a hypervisor to validate requested CPU features. | |
1065 | */ | |
1066 | static u32 msr_based_features[] = { | |
1389309c PB |
1067 | MSR_IA32_VMX_BASIC, |
1068 | MSR_IA32_VMX_TRUE_PINBASED_CTLS, | |
1069 | MSR_IA32_VMX_PINBASED_CTLS, | |
1070 | MSR_IA32_VMX_TRUE_PROCBASED_CTLS, | |
1071 | MSR_IA32_VMX_PROCBASED_CTLS, | |
1072 | MSR_IA32_VMX_TRUE_EXIT_CTLS, | |
1073 | MSR_IA32_VMX_EXIT_CTLS, | |
1074 | MSR_IA32_VMX_TRUE_ENTRY_CTLS, | |
1075 | MSR_IA32_VMX_ENTRY_CTLS, | |
1076 | MSR_IA32_VMX_MISC, | |
1077 | MSR_IA32_VMX_CR0_FIXED0, | |
1078 | MSR_IA32_VMX_CR0_FIXED1, | |
1079 | MSR_IA32_VMX_CR4_FIXED0, | |
1080 | MSR_IA32_VMX_CR4_FIXED1, | |
1081 | MSR_IA32_VMX_VMCS_ENUM, | |
1082 | MSR_IA32_VMX_PROCBASED_CTLS2, | |
1083 | MSR_IA32_VMX_EPT_VPID_CAP, | |
1084 | MSR_IA32_VMX_VMFUNC, | |
1085 | ||
d1d93fa9 | 1086 | MSR_F10H_DECFG, |
518e7b94 | 1087 | MSR_IA32_UCODE_REV, |
801e459a TL |
1088 | }; |
1089 | ||
1090 | static unsigned int num_msr_based_features; | |
1091 | ||
66421c1e WL |
1092 | static int kvm_get_msr_feature(struct kvm_msr_entry *msr) |
1093 | { | |
1094 | switch (msr->index) { | |
518e7b94 WL |
1095 | case MSR_IA32_UCODE_REV: |
1096 | rdmsrl(msr->index, msr->data); | |
1097 | break; | |
66421c1e WL |
1098 | default: |
1099 | if (kvm_x86_ops->get_msr_feature(msr)) | |
1100 | return 1; | |
1101 | } | |
1102 | return 0; | |
1103 | } | |
1104 | ||
801e459a TL |
1105 | static int do_get_msr_feature(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1106 | { | |
1107 | struct kvm_msr_entry msr; | |
66421c1e | 1108 | int r; |
801e459a TL |
1109 | |
1110 | msr.index = index; | |
66421c1e WL |
1111 | r = kvm_get_msr_feature(&msr); |
1112 | if (r) | |
1113 | return r; | |
801e459a TL |
1114 | |
1115 | *data = msr.data; | |
1116 | ||
1117 | return 0; | |
1118 | } | |
1119 | ||
384bb783 | 1120 | bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer) |
15c4a640 | 1121 | { |
b69e8cae | 1122 | if (efer & efer_reserved_bits) |
384bb783 | 1123 | return false; |
15c4a640 | 1124 | |
1b4d56b8 | 1125 | if (efer & EFER_FFXSR && !guest_cpuid_has(vcpu, X86_FEATURE_FXSR_OPT)) |
384bb783 | 1126 | return false; |
1b2fd70c | 1127 | |
1b4d56b8 | 1128 | if (efer & EFER_SVME && !guest_cpuid_has(vcpu, X86_FEATURE_SVM)) |
384bb783 | 1129 | return false; |
d8017474 | 1130 | |
384bb783 JK |
1131 | return true; |
1132 | } | |
1133 | EXPORT_SYMBOL_GPL(kvm_valid_efer); | |
1134 | ||
1135 | static int set_efer(struct kvm_vcpu *vcpu, u64 efer) | |
1136 | { | |
1137 | u64 old_efer = vcpu->arch.efer; | |
1138 | ||
1139 | if (!kvm_valid_efer(vcpu, efer)) | |
1140 | return 1; | |
1141 | ||
1142 | if (is_paging(vcpu) | |
1143 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) | |
1144 | return 1; | |
1145 | ||
15c4a640 | 1146 | efer &= ~EFER_LMA; |
f6801dff | 1147 | efer |= vcpu->arch.efer & EFER_LMA; |
15c4a640 | 1148 | |
a3d204e2 SY |
1149 | kvm_x86_ops->set_efer(vcpu, efer); |
1150 | ||
aad82703 SY |
1151 | /* Update reserved bits */ |
1152 | if ((efer ^ old_efer) & EFER_NX) | |
1153 | kvm_mmu_reset_context(vcpu); | |
1154 | ||
b69e8cae | 1155 | return 0; |
15c4a640 CO |
1156 | } |
1157 | ||
f2b4b7dd JR |
1158 | void kvm_enable_efer_bits(u64 mask) |
1159 | { | |
1160 | efer_reserved_bits &= ~mask; | |
1161 | } | |
1162 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
1163 | ||
15c4a640 CO |
1164 | /* |
1165 | * Writes msr value into into the appropriate "register". | |
1166 | * Returns 0 on success, non-0 otherwise. | |
1167 | * Assumes vcpu_load() was already called. | |
1168 | */ | |
8fe8ab46 | 1169 | int kvm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
15c4a640 | 1170 | { |
854e8bb1 NA |
1171 | switch (msr->index) { |
1172 | case MSR_FS_BASE: | |
1173 | case MSR_GS_BASE: | |
1174 | case MSR_KERNEL_GS_BASE: | |
1175 | case MSR_CSTAR: | |
1176 | case MSR_LSTAR: | |
fd8cb433 | 1177 | if (is_noncanonical_address(msr->data, vcpu)) |
854e8bb1 NA |
1178 | return 1; |
1179 | break; | |
1180 | case MSR_IA32_SYSENTER_EIP: | |
1181 | case MSR_IA32_SYSENTER_ESP: | |
1182 | /* | |
1183 | * IA32_SYSENTER_ESP and IA32_SYSENTER_EIP cause #GP if | |
1184 | * non-canonical address is written on Intel but not on | |
1185 | * AMD (which ignores the top 32-bits, because it does | |
1186 | * not implement 64-bit SYSENTER). | |
1187 | * | |
1188 | * 64-bit code should hence be able to write a non-canonical | |
1189 | * value on AMD. Making the address canonical ensures that | |
1190 | * vmentry does not fail on Intel after writing a non-canonical | |
1191 | * value, and that something deterministic happens if the guest | |
1192 | * invokes 64-bit SYSENTER. | |
1193 | */ | |
fd8cb433 | 1194 | msr->data = get_canonical(msr->data, vcpu_virt_addr_bits(vcpu)); |
854e8bb1 | 1195 | } |
8fe8ab46 | 1196 | return kvm_x86_ops->set_msr(vcpu, msr); |
15c4a640 | 1197 | } |
854e8bb1 | 1198 | EXPORT_SYMBOL_GPL(kvm_set_msr); |
15c4a640 | 1199 | |
313a3dc7 CO |
1200 | /* |
1201 | * Adapt set_msr() to msr_io()'s calling convention | |
1202 | */ | |
609e36d3 PB |
1203 | static int do_get_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1204 | { | |
1205 | struct msr_data msr; | |
1206 | int r; | |
1207 | ||
1208 | msr.index = index; | |
1209 | msr.host_initiated = true; | |
1210 | r = kvm_get_msr(vcpu, &msr); | |
1211 | if (r) | |
1212 | return r; | |
1213 | ||
1214 | *data = msr.data; | |
1215 | return 0; | |
1216 | } | |
1217 | ||
313a3dc7 CO |
1218 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1219 | { | |
8fe8ab46 WA |
1220 | struct msr_data msr; |
1221 | ||
1222 | msr.data = *data; | |
1223 | msr.index = index; | |
1224 | msr.host_initiated = true; | |
1225 | return kvm_set_msr(vcpu, &msr); | |
313a3dc7 CO |
1226 | } |
1227 | ||
16e8d74d MT |
1228 | #ifdef CONFIG_X86_64 |
1229 | struct pvclock_gtod_data { | |
1230 | seqcount_t seq; | |
1231 | ||
1232 | struct { /* extract of a clocksource struct */ | |
1233 | int vclock_mode; | |
a5a1d1c2 TG |
1234 | u64 cycle_last; |
1235 | u64 mask; | |
16e8d74d MT |
1236 | u32 mult; |
1237 | u32 shift; | |
1238 | } clock; | |
1239 | ||
cbcf2dd3 TG |
1240 | u64 boot_ns; |
1241 | u64 nsec_base; | |
55dd00a7 | 1242 | u64 wall_time_sec; |
16e8d74d MT |
1243 | }; |
1244 | ||
1245 | static struct pvclock_gtod_data pvclock_gtod_data; | |
1246 | ||
1247 | static void update_pvclock_gtod(struct timekeeper *tk) | |
1248 | { | |
1249 | struct pvclock_gtod_data *vdata = &pvclock_gtod_data; | |
cbcf2dd3 TG |
1250 | u64 boot_ns; |
1251 | ||
876e7881 | 1252 | boot_ns = ktime_to_ns(ktime_add(tk->tkr_mono.base, tk->offs_boot)); |
16e8d74d MT |
1253 | |
1254 | write_seqcount_begin(&vdata->seq); | |
1255 | ||
1256 | /* copy pvclock gtod data */ | |
876e7881 PZ |
1257 | vdata->clock.vclock_mode = tk->tkr_mono.clock->archdata.vclock_mode; |
1258 | vdata->clock.cycle_last = tk->tkr_mono.cycle_last; | |
1259 | vdata->clock.mask = tk->tkr_mono.mask; | |
1260 | vdata->clock.mult = tk->tkr_mono.mult; | |
1261 | vdata->clock.shift = tk->tkr_mono.shift; | |
16e8d74d | 1262 | |
cbcf2dd3 | 1263 | vdata->boot_ns = boot_ns; |
876e7881 | 1264 | vdata->nsec_base = tk->tkr_mono.xtime_nsec; |
16e8d74d | 1265 | |
55dd00a7 MT |
1266 | vdata->wall_time_sec = tk->xtime_sec; |
1267 | ||
16e8d74d MT |
1268 | write_seqcount_end(&vdata->seq); |
1269 | } | |
1270 | #endif | |
1271 | ||
bab5bb39 NK |
1272 | void kvm_set_pending_timer(struct kvm_vcpu *vcpu) |
1273 | { | |
1274 | /* | |
1275 | * Note: KVM_REQ_PENDING_TIMER is implicitly checked in | |
1276 | * vcpu_enter_guest. This function is only called from | |
1277 | * the physical CPU that is running vcpu. | |
1278 | */ | |
1279 | kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); | |
1280 | } | |
16e8d74d | 1281 | |
18068523 GOC |
1282 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
1283 | { | |
9ed3c444 AK |
1284 | int version; |
1285 | int r; | |
50d0a0f9 | 1286 | struct pvclock_wall_clock wc; |
87aeb54f | 1287 | struct timespec64 boot; |
18068523 GOC |
1288 | |
1289 | if (!wall_clock) | |
1290 | return; | |
1291 | ||
9ed3c444 AK |
1292 | r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version)); |
1293 | if (r) | |
1294 | return; | |
1295 | ||
1296 | if (version & 1) | |
1297 | ++version; /* first time write, random junk */ | |
1298 | ||
1299 | ++version; | |
18068523 | 1300 | |
1dab1345 NK |
1301 | if (kvm_write_guest(kvm, wall_clock, &version, sizeof(version))) |
1302 | return; | |
18068523 | 1303 | |
50d0a0f9 GH |
1304 | /* |
1305 | * The guest calculates current wall clock time by adding | |
34c238a1 | 1306 | * system time (updated by kvm_guest_time_update below) to the |
50d0a0f9 GH |
1307 | * wall clock specified here. guest system time equals host |
1308 | * system time for us, thus we must fill in host boot time here. | |
1309 | */ | |
87aeb54f | 1310 | getboottime64(&boot); |
50d0a0f9 | 1311 | |
4b648665 | 1312 | if (kvm->arch.kvmclock_offset) { |
87aeb54f AB |
1313 | struct timespec64 ts = ns_to_timespec64(kvm->arch.kvmclock_offset); |
1314 | boot = timespec64_sub(boot, ts); | |
4b648665 | 1315 | } |
87aeb54f | 1316 | wc.sec = (u32)boot.tv_sec; /* overflow in 2106 guest time */ |
50d0a0f9 GH |
1317 | wc.nsec = boot.tv_nsec; |
1318 | wc.version = version; | |
18068523 GOC |
1319 | |
1320 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
1321 | ||
1322 | version++; | |
1323 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
1324 | } |
1325 | ||
50d0a0f9 GH |
1326 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
1327 | { | |
b51012de PB |
1328 | do_shl32_div32(dividend, divisor); |
1329 | return dividend; | |
50d0a0f9 GH |
1330 | } |
1331 | ||
3ae13faa | 1332 | static void kvm_get_time_scale(uint64_t scaled_hz, uint64_t base_hz, |
5f4e3f88 | 1333 | s8 *pshift, u32 *pmultiplier) |
50d0a0f9 | 1334 | { |
5f4e3f88 | 1335 | uint64_t scaled64; |
50d0a0f9 GH |
1336 | int32_t shift = 0; |
1337 | uint64_t tps64; | |
1338 | uint32_t tps32; | |
1339 | ||
3ae13faa PB |
1340 | tps64 = base_hz; |
1341 | scaled64 = scaled_hz; | |
50933623 | 1342 | while (tps64 > scaled64*2 || tps64 & 0xffffffff00000000ULL) { |
50d0a0f9 GH |
1343 | tps64 >>= 1; |
1344 | shift--; | |
1345 | } | |
1346 | ||
1347 | tps32 = (uint32_t)tps64; | |
50933623 JK |
1348 | while (tps32 <= scaled64 || scaled64 & 0xffffffff00000000ULL) { |
1349 | if (scaled64 & 0xffffffff00000000ULL || tps32 & 0x80000000) | |
5f4e3f88 ZA |
1350 | scaled64 >>= 1; |
1351 | else | |
1352 | tps32 <<= 1; | |
50d0a0f9 GH |
1353 | shift++; |
1354 | } | |
1355 | ||
5f4e3f88 ZA |
1356 | *pshift = shift; |
1357 | *pmultiplier = div_frac(scaled64, tps32); | |
50d0a0f9 | 1358 | |
3ae13faa PB |
1359 | pr_debug("%s: base_hz %llu => %llu, shift %d, mul %u\n", |
1360 | __func__, base_hz, scaled_hz, shift, *pmultiplier); | |
50d0a0f9 GH |
1361 | } |
1362 | ||
d828199e | 1363 | #ifdef CONFIG_X86_64 |
16e8d74d | 1364 | static atomic_t kvm_guest_has_master_clock = ATOMIC_INIT(0); |
d828199e | 1365 | #endif |
16e8d74d | 1366 | |
c8076604 | 1367 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
69b0049a | 1368 | static unsigned long max_tsc_khz; |
c8076604 | 1369 | |
cc578287 | 1370 | static u32 adjust_tsc_khz(u32 khz, s32 ppm) |
1e993611 | 1371 | { |
cc578287 ZA |
1372 | u64 v = (u64)khz * (1000000 + ppm); |
1373 | do_div(v, 1000000); | |
1374 | return v; | |
1e993611 JR |
1375 | } |
1376 | ||
381d585c HZ |
1377 | static int set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale) |
1378 | { | |
1379 | u64 ratio; | |
1380 | ||
1381 | /* Guest TSC same frequency as host TSC? */ | |
1382 | if (!scale) { | |
1383 | vcpu->arch.tsc_scaling_ratio = kvm_default_tsc_scaling_ratio; | |
1384 | return 0; | |
1385 | } | |
1386 | ||
1387 | /* TSC scaling supported? */ | |
1388 | if (!kvm_has_tsc_control) { | |
1389 | if (user_tsc_khz > tsc_khz) { | |
1390 | vcpu->arch.tsc_catchup = 1; | |
1391 | vcpu->arch.tsc_always_catchup = 1; | |
1392 | return 0; | |
1393 | } else { | |
1394 | WARN(1, "user requested TSC rate below hardware speed\n"); | |
1395 | return -1; | |
1396 | } | |
1397 | } | |
1398 | ||
1399 | /* TSC scaling required - calculate ratio */ | |
1400 | ratio = mul_u64_u32_div(1ULL << kvm_tsc_scaling_ratio_frac_bits, | |
1401 | user_tsc_khz, tsc_khz); | |
1402 | ||
1403 | if (ratio == 0 || ratio >= kvm_max_tsc_scaling_ratio) { | |
1404 | WARN_ONCE(1, "Invalid TSC scaling ratio - virtual-tsc-khz=%u\n", | |
1405 | user_tsc_khz); | |
1406 | return -1; | |
1407 | } | |
1408 | ||
1409 | vcpu->arch.tsc_scaling_ratio = ratio; | |
1410 | return 0; | |
1411 | } | |
1412 | ||
4941b8cb | 1413 | static int kvm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz) |
759379dd | 1414 | { |
cc578287 ZA |
1415 | u32 thresh_lo, thresh_hi; |
1416 | int use_scaling = 0; | |
217fc9cf | 1417 | |
03ba32ca | 1418 | /* tsc_khz can be zero if TSC calibration fails */ |
4941b8cb | 1419 | if (user_tsc_khz == 0) { |
ad721883 HZ |
1420 | /* set tsc_scaling_ratio to a safe value */ |
1421 | vcpu->arch.tsc_scaling_ratio = kvm_default_tsc_scaling_ratio; | |
381d585c | 1422 | return -1; |
ad721883 | 1423 | } |
03ba32ca | 1424 | |
c285545f | 1425 | /* Compute a scale to convert nanoseconds in TSC cycles */ |
3ae13faa | 1426 | kvm_get_time_scale(user_tsc_khz * 1000LL, NSEC_PER_SEC, |
cc578287 ZA |
1427 | &vcpu->arch.virtual_tsc_shift, |
1428 | &vcpu->arch.virtual_tsc_mult); | |
4941b8cb | 1429 | vcpu->arch.virtual_tsc_khz = user_tsc_khz; |
cc578287 ZA |
1430 | |
1431 | /* | |
1432 | * Compute the variation in TSC rate which is acceptable | |
1433 | * within the range of tolerance and decide if the | |
1434 | * rate being applied is within that bounds of the hardware | |
1435 | * rate. If so, no scaling or compensation need be done. | |
1436 | */ | |
1437 | thresh_lo = adjust_tsc_khz(tsc_khz, -tsc_tolerance_ppm); | |
1438 | thresh_hi = adjust_tsc_khz(tsc_khz, tsc_tolerance_ppm); | |
4941b8cb PB |
1439 | if (user_tsc_khz < thresh_lo || user_tsc_khz > thresh_hi) { |
1440 | pr_debug("kvm: requested TSC rate %u falls outside tolerance [%u,%u]\n", user_tsc_khz, thresh_lo, thresh_hi); | |
cc578287 ZA |
1441 | use_scaling = 1; |
1442 | } | |
4941b8cb | 1443 | return set_tsc_khz(vcpu, user_tsc_khz, use_scaling); |
c285545f ZA |
1444 | } |
1445 | ||
1446 | static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns) | |
1447 | { | |
e26101b1 | 1448 | u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.this_tsc_nsec, |
cc578287 ZA |
1449 | vcpu->arch.virtual_tsc_mult, |
1450 | vcpu->arch.virtual_tsc_shift); | |
e26101b1 | 1451 | tsc += vcpu->arch.this_tsc_write; |
c285545f ZA |
1452 | return tsc; |
1453 | } | |
1454 | ||
b0c39dc6 VK |
1455 | static inline int gtod_is_based_on_tsc(int mode) |
1456 | { | |
1457 | return mode == VCLOCK_TSC || mode == VCLOCK_HVCLOCK; | |
1458 | } | |
1459 | ||
69b0049a | 1460 | static void kvm_track_tsc_matching(struct kvm_vcpu *vcpu) |
b48aa97e MT |
1461 | { |
1462 | #ifdef CONFIG_X86_64 | |
1463 | bool vcpus_matched; | |
b48aa97e MT |
1464 | struct kvm_arch *ka = &vcpu->kvm->arch; |
1465 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1466 | ||
1467 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1468 | atomic_read(&vcpu->kvm->online_vcpus)); | |
1469 | ||
7f187922 MT |
1470 | /* |
1471 | * Once the masterclock is enabled, always perform request in | |
1472 | * order to update it. | |
1473 | * | |
1474 | * In order to enable masterclock, the host clocksource must be TSC | |
1475 | * and the vcpus need to have matched TSCs. When that happens, | |
1476 | * perform request to enable masterclock. | |
1477 | */ | |
1478 | if (ka->use_master_clock || | |
b0c39dc6 | 1479 | (gtod_is_based_on_tsc(gtod->clock.vclock_mode) && vcpus_matched)) |
b48aa97e MT |
1480 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
1481 | ||
1482 | trace_kvm_track_tsc(vcpu->vcpu_id, ka->nr_vcpus_matched_tsc, | |
1483 | atomic_read(&vcpu->kvm->online_vcpus), | |
1484 | ka->use_master_clock, gtod->clock.vclock_mode); | |
1485 | #endif | |
1486 | } | |
1487 | ||
ba904635 WA |
1488 | static void update_ia32_tsc_adjust_msr(struct kvm_vcpu *vcpu, s64 offset) |
1489 | { | |
3e3f5026 | 1490 | u64 curr_offset = vcpu->arch.tsc_offset; |
ba904635 WA |
1491 | vcpu->arch.ia32_tsc_adjust_msr += offset - curr_offset; |
1492 | } | |
1493 | ||
35181e86 HZ |
1494 | /* |
1495 | * Multiply tsc by a fixed point number represented by ratio. | |
1496 | * | |
1497 | * The most significant 64-N bits (mult) of ratio represent the | |
1498 | * integral part of the fixed point number; the remaining N bits | |
1499 | * (frac) represent the fractional part, ie. ratio represents a fixed | |
1500 | * point number (mult + frac * 2^(-N)). | |
1501 | * | |
1502 | * N equals to kvm_tsc_scaling_ratio_frac_bits. | |
1503 | */ | |
1504 | static inline u64 __scale_tsc(u64 ratio, u64 tsc) | |
1505 | { | |
1506 | return mul_u64_u64_shr(tsc, ratio, kvm_tsc_scaling_ratio_frac_bits); | |
1507 | } | |
1508 | ||
1509 | u64 kvm_scale_tsc(struct kvm_vcpu *vcpu, u64 tsc) | |
1510 | { | |
1511 | u64 _tsc = tsc; | |
1512 | u64 ratio = vcpu->arch.tsc_scaling_ratio; | |
1513 | ||
1514 | if (ratio != kvm_default_tsc_scaling_ratio) | |
1515 | _tsc = __scale_tsc(ratio, tsc); | |
1516 | ||
1517 | return _tsc; | |
1518 | } | |
1519 | EXPORT_SYMBOL_GPL(kvm_scale_tsc); | |
1520 | ||
07c1419a HZ |
1521 | static u64 kvm_compute_tsc_offset(struct kvm_vcpu *vcpu, u64 target_tsc) |
1522 | { | |
1523 | u64 tsc; | |
1524 | ||
1525 | tsc = kvm_scale_tsc(vcpu, rdtsc()); | |
1526 | ||
1527 | return target_tsc - tsc; | |
1528 | } | |
1529 | ||
4ba76538 HZ |
1530 | u64 kvm_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc) |
1531 | { | |
ea26e4ec | 1532 | return vcpu->arch.tsc_offset + kvm_scale_tsc(vcpu, host_tsc); |
4ba76538 HZ |
1533 | } |
1534 | EXPORT_SYMBOL_GPL(kvm_read_l1_tsc); | |
1535 | ||
a545ab6a LC |
1536 | static void kvm_vcpu_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) |
1537 | { | |
1538 | kvm_x86_ops->write_tsc_offset(vcpu, offset); | |
1539 | vcpu->arch.tsc_offset = offset; | |
1540 | } | |
1541 | ||
b0c39dc6 VK |
1542 | static inline bool kvm_check_tsc_unstable(void) |
1543 | { | |
1544 | #ifdef CONFIG_X86_64 | |
1545 | /* | |
1546 | * TSC is marked unstable when we're running on Hyper-V, | |
1547 | * 'TSC page' clocksource is good. | |
1548 | */ | |
1549 | if (pvclock_gtod_data.clock.vclock_mode == VCLOCK_HVCLOCK) | |
1550 | return false; | |
1551 | #endif | |
1552 | return check_tsc_unstable(); | |
1553 | } | |
1554 | ||
8fe8ab46 | 1555 | void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr) |
99e3e30a ZA |
1556 | { |
1557 | struct kvm *kvm = vcpu->kvm; | |
f38e098f | 1558 | u64 offset, ns, elapsed; |
99e3e30a | 1559 | unsigned long flags; |
b48aa97e | 1560 | bool matched; |
0d3da0d2 | 1561 | bool already_matched; |
8fe8ab46 | 1562 | u64 data = msr->data; |
c5e8ec8e | 1563 | bool synchronizing = false; |
99e3e30a | 1564 | |
038f8c11 | 1565 | raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags); |
07c1419a | 1566 | offset = kvm_compute_tsc_offset(vcpu, data); |
108b249c | 1567 | ns = ktime_get_boot_ns(); |
f38e098f | 1568 | elapsed = ns - kvm->arch.last_tsc_nsec; |
5d3cb0f6 | 1569 | |
03ba32ca | 1570 | if (vcpu->arch.virtual_tsc_khz) { |
bd8fab39 DP |
1571 | if (data == 0 && msr->host_initiated) { |
1572 | /* | |
1573 | * detection of vcpu initialization -- need to sync | |
1574 | * with other vCPUs. This particularly helps to keep | |
1575 | * kvm_clock stable after CPU hotplug | |
1576 | */ | |
1577 | synchronizing = true; | |
1578 | } else { | |
1579 | u64 tsc_exp = kvm->arch.last_tsc_write + | |
1580 | nsec_to_cycles(vcpu, elapsed); | |
1581 | u64 tsc_hz = vcpu->arch.virtual_tsc_khz * 1000LL; | |
1582 | /* | |
1583 | * Special case: TSC write with a small delta (1 second) | |
1584 | * of virtual cycle time against real time is | |
1585 | * interpreted as an attempt to synchronize the CPU. | |
1586 | */ | |
1587 | synchronizing = data < tsc_exp + tsc_hz && | |
1588 | data + tsc_hz > tsc_exp; | |
1589 | } | |
c5e8ec8e | 1590 | } |
f38e098f ZA |
1591 | |
1592 | /* | |
5d3cb0f6 ZA |
1593 | * For a reliable TSC, we can match TSC offsets, and for an unstable |
1594 | * TSC, we add elapsed time in this computation. We could let the | |
1595 | * compensation code attempt to catch up if we fall behind, but | |
1596 | * it's better to try to match offsets from the beginning. | |
1597 | */ | |
c5e8ec8e | 1598 | if (synchronizing && |
5d3cb0f6 | 1599 | vcpu->arch.virtual_tsc_khz == kvm->arch.last_tsc_khz) { |
b0c39dc6 | 1600 | if (!kvm_check_tsc_unstable()) { |
e26101b1 | 1601 | offset = kvm->arch.cur_tsc_offset; |
f38e098f ZA |
1602 | pr_debug("kvm: matched tsc offset for %llu\n", data); |
1603 | } else { | |
857e4099 | 1604 | u64 delta = nsec_to_cycles(vcpu, elapsed); |
5d3cb0f6 | 1605 | data += delta; |
07c1419a | 1606 | offset = kvm_compute_tsc_offset(vcpu, data); |
759379dd | 1607 | pr_debug("kvm: adjusted tsc offset by %llu\n", delta); |
f38e098f | 1608 | } |
b48aa97e | 1609 | matched = true; |
0d3da0d2 | 1610 | already_matched = (vcpu->arch.this_tsc_generation == kvm->arch.cur_tsc_generation); |
e26101b1 ZA |
1611 | } else { |
1612 | /* | |
1613 | * We split periods of matched TSC writes into generations. | |
1614 | * For each generation, we track the original measured | |
1615 | * nanosecond time, offset, and write, so if TSCs are in | |
1616 | * sync, we can match exact offset, and if not, we can match | |
4a969980 | 1617 | * exact software computation in compute_guest_tsc() |
e26101b1 ZA |
1618 | * |
1619 | * These values are tracked in kvm->arch.cur_xxx variables. | |
1620 | */ | |
1621 | kvm->arch.cur_tsc_generation++; | |
1622 | kvm->arch.cur_tsc_nsec = ns; | |
1623 | kvm->arch.cur_tsc_write = data; | |
1624 | kvm->arch.cur_tsc_offset = offset; | |
b48aa97e | 1625 | matched = false; |
0d3da0d2 | 1626 | pr_debug("kvm: new tsc generation %llu, clock %llu\n", |
e26101b1 | 1627 | kvm->arch.cur_tsc_generation, data); |
f38e098f | 1628 | } |
e26101b1 ZA |
1629 | |
1630 | /* | |
1631 | * We also track th most recent recorded KHZ, write and time to | |
1632 | * allow the matching interval to be extended at each write. | |
1633 | */ | |
f38e098f ZA |
1634 | kvm->arch.last_tsc_nsec = ns; |
1635 | kvm->arch.last_tsc_write = data; | |
5d3cb0f6 | 1636 | kvm->arch.last_tsc_khz = vcpu->arch.virtual_tsc_khz; |
99e3e30a | 1637 | |
b183aa58 | 1638 | vcpu->arch.last_guest_tsc = data; |
e26101b1 ZA |
1639 | |
1640 | /* Keep track of which generation this VCPU has synchronized to */ | |
1641 | vcpu->arch.this_tsc_generation = kvm->arch.cur_tsc_generation; | |
1642 | vcpu->arch.this_tsc_nsec = kvm->arch.cur_tsc_nsec; | |
1643 | vcpu->arch.this_tsc_write = kvm->arch.cur_tsc_write; | |
1644 | ||
d6321d49 | 1645 | if (!msr->host_initiated && guest_cpuid_has(vcpu, X86_FEATURE_TSC_ADJUST)) |
ba904635 | 1646 | update_ia32_tsc_adjust_msr(vcpu, offset); |
d6321d49 | 1647 | |
a545ab6a | 1648 | kvm_vcpu_write_tsc_offset(vcpu, offset); |
e26101b1 | 1649 | raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags); |
b48aa97e MT |
1650 | |
1651 | spin_lock(&kvm->arch.pvclock_gtod_sync_lock); | |
0d3da0d2 | 1652 | if (!matched) { |
b48aa97e | 1653 | kvm->arch.nr_vcpus_matched_tsc = 0; |
0d3da0d2 TG |
1654 | } else if (!already_matched) { |
1655 | kvm->arch.nr_vcpus_matched_tsc++; | |
1656 | } | |
b48aa97e MT |
1657 | |
1658 | kvm_track_tsc_matching(vcpu); | |
1659 | spin_unlock(&kvm->arch.pvclock_gtod_sync_lock); | |
99e3e30a | 1660 | } |
e26101b1 | 1661 | |
99e3e30a ZA |
1662 | EXPORT_SYMBOL_GPL(kvm_write_tsc); |
1663 | ||
58ea6767 HZ |
1664 | static inline void adjust_tsc_offset_guest(struct kvm_vcpu *vcpu, |
1665 | s64 adjustment) | |
1666 | { | |
ea26e4ec | 1667 | kvm_vcpu_write_tsc_offset(vcpu, vcpu->arch.tsc_offset + adjustment); |
58ea6767 HZ |
1668 | } |
1669 | ||
1670 | static inline void adjust_tsc_offset_host(struct kvm_vcpu *vcpu, s64 adjustment) | |
1671 | { | |
1672 | if (vcpu->arch.tsc_scaling_ratio != kvm_default_tsc_scaling_ratio) | |
1673 | WARN_ON(adjustment < 0); | |
1674 | adjustment = kvm_scale_tsc(vcpu, (u64) adjustment); | |
ea26e4ec | 1675 | adjust_tsc_offset_guest(vcpu, adjustment); |
58ea6767 HZ |
1676 | } |
1677 | ||
d828199e MT |
1678 | #ifdef CONFIG_X86_64 |
1679 | ||
a5a1d1c2 | 1680 | static u64 read_tsc(void) |
d828199e | 1681 | { |
a5a1d1c2 | 1682 | u64 ret = (u64)rdtsc_ordered(); |
03b9730b | 1683 | u64 last = pvclock_gtod_data.clock.cycle_last; |
d828199e MT |
1684 | |
1685 | if (likely(ret >= last)) | |
1686 | return ret; | |
1687 | ||
1688 | /* | |
1689 | * GCC likes to generate cmov here, but this branch is extremely | |
6a6256f9 | 1690 | * predictable (it's just a function of time and the likely is |
d828199e MT |
1691 | * very likely) and there's a data dependence, so force GCC |
1692 | * to generate a branch instead. I don't barrier() because | |
1693 | * we don't actually need a barrier, and if this function | |
1694 | * ever gets inlined it will generate worse code. | |
1695 | */ | |
1696 | asm volatile (""); | |
1697 | return last; | |
1698 | } | |
1699 | ||
b0c39dc6 | 1700 | static inline u64 vgettsc(u64 *tsc_timestamp, int *mode) |
d828199e MT |
1701 | { |
1702 | long v; | |
1703 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
b0c39dc6 VK |
1704 | u64 tsc_pg_val; |
1705 | ||
1706 | switch (gtod->clock.vclock_mode) { | |
1707 | case VCLOCK_HVCLOCK: | |
1708 | tsc_pg_val = hv_read_tsc_page_tsc(hv_get_tsc_page(), | |
1709 | tsc_timestamp); | |
1710 | if (tsc_pg_val != U64_MAX) { | |
1711 | /* TSC page valid */ | |
1712 | *mode = VCLOCK_HVCLOCK; | |
1713 | v = (tsc_pg_val - gtod->clock.cycle_last) & | |
1714 | gtod->clock.mask; | |
1715 | } else { | |
1716 | /* TSC page invalid */ | |
1717 | *mode = VCLOCK_NONE; | |
1718 | } | |
1719 | break; | |
1720 | case VCLOCK_TSC: | |
1721 | *mode = VCLOCK_TSC; | |
1722 | *tsc_timestamp = read_tsc(); | |
1723 | v = (*tsc_timestamp - gtod->clock.cycle_last) & | |
1724 | gtod->clock.mask; | |
1725 | break; | |
1726 | default: | |
1727 | *mode = VCLOCK_NONE; | |
1728 | } | |
d828199e | 1729 | |
b0c39dc6 VK |
1730 | if (*mode == VCLOCK_NONE) |
1731 | *tsc_timestamp = v = 0; | |
d828199e | 1732 | |
d828199e MT |
1733 | return v * gtod->clock.mult; |
1734 | } | |
1735 | ||
b0c39dc6 | 1736 | static int do_monotonic_boot(s64 *t, u64 *tsc_timestamp) |
d828199e | 1737 | { |
cbcf2dd3 | 1738 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; |
d828199e | 1739 | unsigned long seq; |
d828199e | 1740 | int mode; |
cbcf2dd3 | 1741 | u64 ns; |
d828199e | 1742 | |
d828199e MT |
1743 | do { |
1744 | seq = read_seqcount_begin(>od->seq); | |
cbcf2dd3 | 1745 | ns = gtod->nsec_base; |
b0c39dc6 | 1746 | ns += vgettsc(tsc_timestamp, &mode); |
d828199e | 1747 | ns >>= gtod->clock.shift; |
cbcf2dd3 | 1748 | ns += gtod->boot_ns; |
d828199e | 1749 | } while (unlikely(read_seqcount_retry(>od->seq, seq))); |
cbcf2dd3 | 1750 | *t = ns; |
d828199e MT |
1751 | |
1752 | return mode; | |
1753 | } | |
1754 | ||
b0c39dc6 | 1755 | static int do_realtime(struct timespec *ts, u64 *tsc_timestamp) |
55dd00a7 MT |
1756 | { |
1757 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1758 | unsigned long seq; | |
1759 | int mode; | |
1760 | u64 ns; | |
1761 | ||
1762 | do { | |
1763 | seq = read_seqcount_begin(>od->seq); | |
55dd00a7 MT |
1764 | ts->tv_sec = gtod->wall_time_sec; |
1765 | ns = gtod->nsec_base; | |
b0c39dc6 | 1766 | ns += vgettsc(tsc_timestamp, &mode); |
55dd00a7 MT |
1767 | ns >>= gtod->clock.shift; |
1768 | } while (unlikely(read_seqcount_retry(>od->seq, seq))); | |
1769 | ||
1770 | ts->tv_sec += __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns); | |
1771 | ts->tv_nsec = ns; | |
1772 | ||
1773 | return mode; | |
1774 | } | |
1775 | ||
b0c39dc6 VK |
1776 | /* returns true if host is using TSC based clocksource */ |
1777 | static bool kvm_get_time_and_clockread(s64 *kernel_ns, u64 *tsc_timestamp) | |
d828199e | 1778 | { |
d828199e | 1779 | /* checked again under seqlock below */ |
b0c39dc6 | 1780 | if (!gtod_is_based_on_tsc(pvclock_gtod_data.clock.vclock_mode)) |
d828199e MT |
1781 | return false; |
1782 | ||
b0c39dc6 VK |
1783 | return gtod_is_based_on_tsc(do_monotonic_boot(kernel_ns, |
1784 | tsc_timestamp)); | |
d828199e | 1785 | } |
55dd00a7 | 1786 | |
b0c39dc6 | 1787 | /* returns true if host is using TSC based clocksource */ |
55dd00a7 | 1788 | static bool kvm_get_walltime_and_clockread(struct timespec *ts, |
b0c39dc6 | 1789 | u64 *tsc_timestamp) |
55dd00a7 MT |
1790 | { |
1791 | /* checked again under seqlock below */ | |
b0c39dc6 | 1792 | if (!gtod_is_based_on_tsc(pvclock_gtod_data.clock.vclock_mode)) |
55dd00a7 MT |
1793 | return false; |
1794 | ||
b0c39dc6 | 1795 | return gtod_is_based_on_tsc(do_realtime(ts, tsc_timestamp)); |
55dd00a7 | 1796 | } |
d828199e MT |
1797 | #endif |
1798 | ||
1799 | /* | |
1800 | * | |
b48aa97e MT |
1801 | * Assuming a stable TSC across physical CPUS, and a stable TSC |
1802 | * across virtual CPUs, the following condition is possible. | |
1803 | * Each numbered line represents an event visible to both | |
d828199e MT |
1804 | * CPUs at the next numbered event. |
1805 | * | |
1806 | * "timespecX" represents host monotonic time. "tscX" represents | |
1807 | * RDTSC value. | |
1808 | * | |
1809 | * VCPU0 on CPU0 | VCPU1 on CPU1 | |
1810 | * | |
1811 | * 1. read timespec0,tsc0 | |
1812 | * 2. | timespec1 = timespec0 + N | |
1813 | * | tsc1 = tsc0 + M | |
1814 | * 3. transition to guest | transition to guest | |
1815 | * 4. ret0 = timespec0 + (rdtsc - tsc0) | | |
1816 | * 5. | ret1 = timespec1 + (rdtsc - tsc1) | |
1817 | * | ret1 = timespec0 + N + (rdtsc - (tsc0 + M)) | |
1818 | * | |
1819 | * Since ret0 update is visible to VCPU1 at time 5, to obey monotonicity: | |
1820 | * | |
1821 | * - ret0 < ret1 | |
1822 | * - timespec0 + (rdtsc - tsc0) < timespec0 + N + (rdtsc - (tsc0 + M)) | |
1823 | * ... | |
1824 | * - 0 < N - M => M < N | |
1825 | * | |
1826 | * That is, when timespec0 != timespec1, M < N. Unfortunately that is not | |
1827 | * always the case (the difference between two distinct xtime instances | |
1828 | * might be smaller then the difference between corresponding TSC reads, | |
1829 | * when updating guest vcpus pvclock areas). | |
1830 | * | |
1831 | * To avoid that problem, do not allow visibility of distinct | |
1832 | * system_timestamp/tsc_timestamp values simultaneously: use a master | |
1833 | * copy of host monotonic time values. Update that master copy | |
1834 | * in lockstep. | |
1835 | * | |
b48aa97e | 1836 | * Rely on synchronization of host TSCs and guest TSCs for monotonicity. |
d828199e MT |
1837 | * |
1838 | */ | |
1839 | ||
1840 | static void pvclock_update_vm_gtod_copy(struct kvm *kvm) | |
1841 | { | |
1842 | #ifdef CONFIG_X86_64 | |
1843 | struct kvm_arch *ka = &kvm->arch; | |
1844 | int vclock_mode; | |
b48aa97e MT |
1845 | bool host_tsc_clocksource, vcpus_matched; |
1846 | ||
1847 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1848 | atomic_read(&kvm->online_vcpus)); | |
d828199e MT |
1849 | |
1850 | /* | |
1851 | * If the host uses TSC clock, then passthrough TSC as stable | |
1852 | * to the guest. | |
1853 | */ | |
b48aa97e | 1854 | host_tsc_clocksource = kvm_get_time_and_clockread( |
d828199e MT |
1855 | &ka->master_kernel_ns, |
1856 | &ka->master_cycle_now); | |
1857 | ||
16a96021 | 1858 | ka->use_master_clock = host_tsc_clocksource && vcpus_matched |
a826faf1 | 1859 | && !ka->backwards_tsc_observed |
54750f2c | 1860 | && !ka->boot_vcpu_runs_old_kvmclock; |
b48aa97e | 1861 | |
d828199e MT |
1862 | if (ka->use_master_clock) |
1863 | atomic_set(&kvm_guest_has_master_clock, 1); | |
1864 | ||
1865 | vclock_mode = pvclock_gtod_data.clock.vclock_mode; | |
b48aa97e MT |
1866 | trace_kvm_update_master_clock(ka->use_master_clock, vclock_mode, |
1867 | vcpus_matched); | |
d828199e MT |
1868 | #endif |
1869 | } | |
1870 | ||
2860c4b1 PB |
1871 | void kvm_make_mclock_inprogress_request(struct kvm *kvm) |
1872 | { | |
1873 | kvm_make_all_cpus_request(kvm, KVM_REQ_MCLOCK_INPROGRESS); | |
1874 | } | |
1875 | ||
2e762ff7 MT |
1876 | static void kvm_gen_update_masterclock(struct kvm *kvm) |
1877 | { | |
1878 | #ifdef CONFIG_X86_64 | |
1879 | int i; | |
1880 | struct kvm_vcpu *vcpu; | |
1881 | struct kvm_arch *ka = &kvm->arch; | |
1882 | ||
1883 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
1884 | kvm_make_mclock_inprogress_request(kvm); | |
1885 | /* no guest entries from this point */ | |
1886 | pvclock_update_vm_gtod_copy(kvm); | |
1887 | ||
1888 | kvm_for_each_vcpu(i, vcpu, kvm) | |
105b21bb | 1889 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
2e762ff7 MT |
1890 | |
1891 | /* guest entries allowed */ | |
1892 | kvm_for_each_vcpu(i, vcpu, kvm) | |
72875d8a | 1893 | kvm_clear_request(KVM_REQ_MCLOCK_INPROGRESS, vcpu); |
2e762ff7 MT |
1894 | |
1895 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
1896 | #endif | |
1897 | } | |
1898 | ||
e891a32e | 1899 | u64 get_kvmclock_ns(struct kvm *kvm) |
108b249c | 1900 | { |
108b249c | 1901 | struct kvm_arch *ka = &kvm->arch; |
8b953440 | 1902 | struct pvclock_vcpu_time_info hv_clock; |
e2c2206a | 1903 | u64 ret; |
108b249c | 1904 | |
8b953440 PB |
1905 | spin_lock(&ka->pvclock_gtod_sync_lock); |
1906 | if (!ka->use_master_clock) { | |
1907 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
1908 | return ktime_get_boot_ns() + ka->kvmclock_offset; | |
108b249c PB |
1909 | } |
1910 | ||
8b953440 PB |
1911 | hv_clock.tsc_timestamp = ka->master_cycle_now; |
1912 | hv_clock.system_time = ka->master_kernel_ns + ka->kvmclock_offset; | |
1913 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
1914 | ||
e2c2206a WL |
1915 | /* both __this_cpu_read() and rdtsc() should be on the same cpu */ |
1916 | get_cpu(); | |
1917 | ||
e70b57a6 WL |
1918 | if (__this_cpu_read(cpu_tsc_khz)) { |
1919 | kvm_get_time_scale(NSEC_PER_SEC, __this_cpu_read(cpu_tsc_khz) * 1000LL, | |
1920 | &hv_clock.tsc_shift, | |
1921 | &hv_clock.tsc_to_system_mul); | |
1922 | ret = __pvclock_read_cycles(&hv_clock, rdtsc()); | |
1923 | } else | |
1924 | ret = ktime_get_boot_ns() + ka->kvmclock_offset; | |
e2c2206a WL |
1925 | |
1926 | put_cpu(); | |
1927 | ||
1928 | return ret; | |
108b249c PB |
1929 | } |
1930 | ||
0d6dd2ff PB |
1931 | static void kvm_setup_pvclock_page(struct kvm_vcpu *v) |
1932 | { | |
1933 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
1934 | struct pvclock_vcpu_time_info guest_hv_clock; | |
1935 | ||
4e335d9e | 1936 | if (unlikely(kvm_read_guest_cached(v->kvm, &vcpu->pv_time, |
0d6dd2ff PB |
1937 | &guest_hv_clock, sizeof(guest_hv_clock)))) |
1938 | return; | |
1939 | ||
1940 | /* This VCPU is paused, but it's legal for a guest to read another | |
1941 | * VCPU's kvmclock, so we really have to follow the specification where | |
1942 | * it says that version is odd if data is being modified, and even after | |
1943 | * it is consistent. | |
1944 | * | |
1945 | * Version field updates must be kept separate. This is because | |
1946 | * kvm_write_guest_cached might use a "rep movs" instruction, and | |
1947 | * writes within a string instruction are weakly ordered. So there | |
1948 | * are three writes overall. | |
1949 | * | |
1950 | * As a small optimization, only write the version field in the first | |
1951 | * and third write. The vcpu->pv_time cache is still valid, because the | |
1952 | * version field is the first in the struct. | |
1953 | */ | |
1954 | BUILD_BUG_ON(offsetof(struct pvclock_vcpu_time_info, version) != 0); | |
1955 | ||
51c4b8bb LA |
1956 | if (guest_hv_clock.version & 1) |
1957 | ++guest_hv_clock.version; /* first time write, random junk */ | |
1958 | ||
0d6dd2ff | 1959 | vcpu->hv_clock.version = guest_hv_clock.version + 1; |
4e335d9e PB |
1960 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
1961 | &vcpu->hv_clock, | |
1962 | sizeof(vcpu->hv_clock.version)); | |
0d6dd2ff PB |
1963 | |
1964 | smp_wmb(); | |
1965 | ||
1966 | /* retain PVCLOCK_GUEST_STOPPED if set in guest copy */ | |
1967 | vcpu->hv_clock.flags |= (guest_hv_clock.flags & PVCLOCK_GUEST_STOPPED); | |
1968 | ||
1969 | if (vcpu->pvclock_set_guest_stopped_request) { | |
1970 | vcpu->hv_clock.flags |= PVCLOCK_GUEST_STOPPED; | |
1971 | vcpu->pvclock_set_guest_stopped_request = false; | |
1972 | } | |
1973 | ||
1974 | trace_kvm_pvclock_update(v->vcpu_id, &vcpu->hv_clock); | |
1975 | ||
4e335d9e PB |
1976 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
1977 | &vcpu->hv_clock, | |
1978 | sizeof(vcpu->hv_clock)); | |
0d6dd2ff PB |
1979 | |
1980 | smp_wmb(); | |
1981 | ||
1982 | vcpu->hv_clock.version++; | |
4e335d9e PB |
1983 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
1984 | &vcpu->hv_clock, | |
1985 | sizeof(vcpu->hv_clock.version)); | |
0d6dd2ff PB |
1986 | } |
1987 | ||
34c238a1 | 1988 | static int kvm_guest_time_update(struct kvm_vcpu *v) |
18068523 | 1989 | { |
78db6a50 | 1990 | unsigned long flags, tgt_tsc_khz; |
18068523 | 1991 | struct kvm_vcpu_arch *vcpu = &v->arch; |
d828199e | 1992 | struct kvm_arch *ka = &v->kvm->arch; |
f25e656d | 1993 | s64 kernel_ns; |
d828199e | 1994 | u64 tsc_timestamp, host_tsc; |
51d59c6b | 1995 | u8 pvclock_flags; |
d828199e MT |
1996 | bool use_master_clock; |
1997 | ||
1998 | kernel_ns = 0; | |
1999 | host_tsc = 0; | |
18068523 | 2000 | |
d828199e MT |
2001 | /* |
2002 | * If the host uses TSC clock, then passthrough TSC as stable | |
2003 | * to the guest. | |
2004 | */ | |
2005 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
2006 | use_master_clock = ka->use_master_clock; | |
2007 | if (use_master_clock) { | |
2008 | host_tsc = ka->master_cycle_now; | |
2009 | kernel_ns = ka->master_kernel_ns; | |
2010 | } | |
2011 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
c09664bb MT |
2012 | |
2013 | /* Keep irq disabled to prevent changes to the clock */ | |
2014 | local_irq_save(flags); | |
78db6a50 PB |
2015 | tgt_tsc_khz = __this_cpu_read(cpu_tsc_khz); |
2016 | if (unlikely(tgt_tsc_khz == 0)) { | |
c09664bb MT |
2017 | local_irq_restore(flags); |
2018 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); | |
2019 | return 1; | |
2020 | } | |
d828199e | 2021 | if (!use_master_clock) { |
4ea1636b | 2022 | host_tsc = rdtsc(); |
108b249c | 2023 | kernel_ns = ktime_get_boot_ns(); |
d828199e MT |
2024 | } |
2025 | ||
4ba76538 | 2026 | tsc_timestamp = kvm_read_l1_tsc(v, host_tsc); |
d828199e | 2027 | |
c285545f ZA |
2028 | /* |
2029 | * We may have to catch up the TSC to match elapsed wall clock | |
2030 | * time for two reasons, even if kvmclock is used. | |
2031 | * 1) CPU could have been running below the maximum TSC rate | |
2032 | * 2) Broken TSC compensation resets the base at each VCPU | |
2033 | * entry to avoid unknown leaps of TSC even when running | |
2034 | * again on the same CPU. This may cause apparent elapsed | |
2035 | * time to disappear, and the guest to stand still or run | |
2036 | * very slowly. | |
2037 | */ | |
2038 | if (vcpu->tsc_catchup) { | |
2039 | u64 tsc = compute_guest_tsc(v, kernel_ns); | |
2040 | if (tsc > tsc_timestamp) { | |
f1e2b260 | 2041 | adjust_tsc_offset_guest(v, tsc - tsc_timestamp); |
c285545f ZA |
2042 | tsc_timestamp = tsc; |
2043 | } | |
50d0a0f9 GH |
2044 | } |
2045 | ||
18068523 GOC |
2046 | local_irq_restore(flags); |
2047 | ||
0d6dd2ff | 2048 | /* With all the info we got, fill in the values */ |
18068523 | 2049 | |
78db6a50 PB |
2050 | if (kvm_has_tsc_control) |
2051 | tgt_tsc_khz = kvm_scale_tsc(v, tgt_tsc_khz); | |
2052 | ||
2053 | if (unlikely(vcpu->hw_tsc_khz != tgt_tsc_khz)) { | |
3ae13faa | 2054 | kvm_get_time_scale(NSEC_PER_SEC, tgt_tsc_khz * 1000LL, |
5f4e3f88 ZA |
2055 | &vcpu->hv_clock.tsc_shift, |
2056 | &vcpu->hv_clock.tsc_to_system_mul); | |
78db6a50 | 2057 | vcpu->hw_tsc_khz = tgt_tsc_khz; |
8cfdc000 ZA |
2058 | } |
2059 | ||
1d5f066e | 2060 | vcpu->hv_clock.tsc_timestamp = tsc_timestamp; |
759379dd | 2061 | vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset; |
28e4639a | 2062 | vcpu->last_guest_tsc = tsc_timestamp; |
51d59c6b | 2063 | |
d828199e | 2064 | /* If the host uses TSC clocksource, then it is stable */ |
0d6dd2ff | 2065 | pvclock_flags = 0; |
d828199e MT |
2066 | if (use_master_clock) |
2067 | pvclock_flags |= PVCLOCK_TSC_STABLE_BIT; | |
2068 | ||
78c0337a MT |
2069 | vcpu->hv_clock.flags = pvclock_flags; |
2070 | ||
095cf55d PB |
2071 | if (vcpu->pv_time_enabled) |
2072 | kvm_setup_pvclock_page(v); | |
2073 | if (v == kvm_get_vcpu(v->kvm, 0)) | |
2074 | kvm_hv_setup_tsc_page(v->kvm, &vcpu->hv_clock); | |
8cfdc000 | 2075 | return 0; |
c8076604 GH |
2076 | } |
2077 | ||
0061d53d MT |
2078 | /* |
2079 | * kvmclock updates which are isolated to a given vcpu, such as | |
2080 | * vcpu->cpu migration, should not allow system_timestamp from | |
2081 | * the rest of the vcpus to remain static. Otherwise ntp frequency | |
2082 | * correction applies to one vcpu's system_timestamp but not | |
2083 | * the others. | |
2084 | * | |
2085 | * So in those cases, request a kvmclock update for all vcpus. | |
7e44e449 AJ |
2086 | * We need to rate-limit these requests though, as they can |
2087 | * considerably slow guests that have a large number of vcpus. | |
2088 | * The time for a remote vcpu to update its kvmclock is bound | |
2089 | * by the delay we use to rate-limit the updates. | |
0061d53d MT |
2090 | */ |
2091 | ||
7e44e449 AJ |
2092 | #define KVMCLOCK_UPDATE_DELAY msecs_to_jiffies(100) |
2093 | ||
2094 | static void kvmclock_update_fn(struct work_struct *work) | |
0061d53d MT |
2095 | { |
2096 | int i; | |
7e44e449 AJ |
2097 | struct delayed_work *dwork = to_delayed_work(work); |
2098 | struct kvm_arch *ka = container_of(dwork, struct kvm_arch, | |
2099 | kvmclock_update_work); | |
2100 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
0061d53d MT |
2101 | struct kvm_vcpu *vcpu; |
2102 | ||
2103 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
105b21bb | 2104 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0061d53d MT |
2105 | kvm_vcpu_kick(vcpu); |
2106 | } | |
2107 | } | |
2108 | ||
7e44e449 AJ |
2109 | static void kvm_gen_kvmclock_update(struct kvm_vcpu *v) |
2110 | { | |
2111 | struct kvm *kvm = v->kvm; | |
2112 | ||
105b21bb | 2113 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); |
7e44e449 AJ |
2114 | schedule_delayed_work(&kvm->arch.kvmclock_update_work, |
2115 | KVMCLOCK_UPDATE_DELAY); | |
2116 | } | |
2117 | ||
332967a3 AJ |
2118 | #define KVMCLOCK_SYNC_PERIOD (300 * HZ) |
2119 | ||
2120 | static void kvmclock_sync_fn(struct work_struct *work) | |
2121 | { | |
2122 | struct delayed_work *dwork = to_delayed_work(work); | |
2123 | struct kvm_arch *ka = container_of(dwork, struct kvm_arch, | |
2124 | kvmclock_sync_work); | |
2125 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
2126 | ||
630994b3 MT |
2127 | if (!kvmclock_periodic_sync) |
2128 | return; | |
2129 | ||
332967a3 AJ |
2130 | schedule_delayed_work(&kvm->arch.kvmclock_update_work, 0); |
2131 | schedule_delayed_work(&kvm->arch.kvmclock_sync_work, | |
2132 | KVMCLOCK_SYNC_PERIOD); | |
2133 | } | |
2134 | ||
9ffd986c | 2135 | static int set_msr_mce(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
15c4a640 | 2136 | { |
890ca9ae HY |
2137 | u64 mcg_cap = vcpu->arch.mcg_cap; |
2138 | unsigned bank_num = mcg_cap & 0xff; | |
9ffd986c WL |
2139 | u32 msr = msr_info->index; |
2140 | u64 data = msr_info->data; | |
890ca9ae | 2141 | |
15c4a640 | 2142 | switch (msr) { |
15c4a640 | 2143 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 2144 | vcpu->arch.mcg_status = data; |
15c4a640 | 2145 | break; |
c7ac679c | 2146 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
2147 | if (!(mcg_cap & MCG_CTL_P)) |
2148 | return 1; | |
2149 | if (data != 0 && data != ~(u64)0) | |
2150 | return -1; | |
2151 | vcpu->arch.mcg_ctl = data; | |
2152 | break; | |
2153 | default: | |
2154 | if (msr >= MSR_IA32_MC0_CTL && | |
81760dcc | 2155 | msr < MSR_IA32_MCx_CTL(bank_num)) { |
890ca9ae | 2156 | u32 offset = msr - MSR_IA32_MC0_CTL; |
114be429 AP |
2157 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
2158 | * some Linux kernels though clear bit 10 in bank 4 to | |
2159 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore | |
2160 | * this to avoid an uncatched #GP in the guest | |
2161 | */ | |
890ca9ae | 2162 | if ((offset & 0x3) == 0 && |
114be429 | 2163 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
890ca9ae | 2164 | return -1; |
9ffd986c WL |
2165 | if (!msr_info->host_initiated && |
2166 | (offset & 0x3) == 1 && data != 0) | |
2167 | return -1; | |
890ca9ae HY |
2168 | vcpu->arch.mce_banks[offset] = data; |
2169 | break; | |
2170 | } | |
2171 | return 1; | |
2172 | } | |
2173 | return 0; | |
2174 | } | |
2175 | ||
ffde22ac ES |
2176 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
2177 | { | |
2178 | struct kvm *kvm = vcpu->kvm; | |
2179 | int lm = is_long_mode(vcpu); | |
2180 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
2181 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
2182 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
2183 | : kvm->arch.xen_hvm_config.blob_size_32; | |
2184 | u32 page_num = data & ~PAGE_MASK; | |
2185 | u64 page_addr = data & PAGE_MASK; | |
2186 | u8 *page; | |
2187 | int r; | |
2188 | ||
2189 | r = -E2BIG; | |
2190 | if (page_num >= blob_size) | |
2191 | goto out; | |
2192 | r = -ENOMEM; | |
ff5c2c03 SL |
2193 | page = memdup_user(blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE); |
2194 | if (IS_ERR(page)) { | |
2195 | r = PTR_ERR(page); | |
ffde22ac | 2196 | goto out; |
ff5c2c03 | 2197 | } |
54bf36aa | 2198 | if (kvm_vcpu_write_guest(vcpu, page_addr, page, PAGE_SIZE)) |
ffde22ac ES |
2199 | goto out_free; |
2200 | r = 0; | |
2201 | out_free: | |
2202 | kfree(page); | |
2203 | out: | |
2204 | return r; | |
2205 | } | |
2206 | ||
344d9588 GN |
2207 | static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data) |
2208 | { | |
2209 | gpa_t gpa = data & ~0x3f; | |
2210 | ||
52a5c155 WL |
2211 | /* Bits 3:5 are reserved, Should be zero */ |
2212 | if (data & 0x38) | |
344d9588 GN |
2213 | return 1; |
2214 | ||
2215 | vcpu->arch.apf.msr_val = data; | |
2216 | ||
2217 | if (!(data & KVM_ASYNC_PF_ENABLED)) { | |
2218 | kvm_clear_async_pf_completion_queue(vcpu); | |
2219 | kvm_async_pf_hash_reset(vcpu); | |
2220 | return 0; | |
2221 | } | |
2222 | ||
4e335d9e | 2223 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.apf.data, gpa, |
8f964525 | 2224 | sizeof(u32))) |
344d9588 GN |
2225 | return 1; |
2226 | ||
6adba527 | 2227 | vcpu->arch.apf.send_user_only = !(data & KVM_ASYNC_PF_SEND_ALWAYS); |
52a5c155 | 2228 | vcpu->arch.apf.delivery_as_pf_vmexit = data & KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT; |
344d9588 GN |
2229 | kvm_async_pf_wakeup_all(vcpu); |
2230 | return 0; | |
2231 | } | |
2232 | ||
12f9a48f GC |
2233 | static void kvmclock_reset(struct kvm_vcpu *vcpu) |
2234 | { | |
0b79459b | 2235 | vcpu->arch.pv_time_enabled = false; |
12f9a48f GC |
2236 | } |
2237 | ||
f38a7b75 WL |
2238 | static void kvm_vcpu_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa) |
2239 | { | |
2240 | ++vcpu->stat.tlb_flush; | |
2241 | kvm_x86_ops->tlb_flush(vcpu, invalidate_gpa); | |
2242 | } | |
2243 | ||
c9aaa895 GC |
2244 | static void record_steal_time(struct kvm_vcpu *vcpu) |
2245 | { | |
2246 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
2247 | return; | |
2248 | ||
4e335d9e | 2249 | if (unlikely(kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
c9aaa895 GC |
2250 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)))) |
2251 | return; | |
2252 | ||
f38a7b75 WL |
2253 | /* |
2254 | * Doing a TLB flush here, on the guest's behalf, can avoid | |
2255 | * expensive IPIs. | |
2256 | */ | |
2257 | if (xchg(&vcpu->arch.st.steal.preempted, 0) & KVM_VCPU_FLUSH_TLB) | |
2258 | kvm_vcpu_flush_tlb(vcpu, false); | |
0b9f6c46 | 2259 | |
35f3fae1 WL |
2260 | if (vcpu->arch.st.steal.version & 1) |
2261 | vcpu->arch.st.steal.version += 1; /* first time write, random junk */ | |
2262 | ||
2263 | vcpu->arch.st.steal.version += 1; | |
2264 | ||
4e335d9e | 2265 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
35f3fae1 WL |
2266 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); |
2267 | ||
2268 | smp_wmb(); | |
2269 | ||
c54cdf14 LC |
2270 | vcpu->arch.st.steal.steal += current->sched_info.run_delay - |
2271 | vcpu->arch.st.last_steal; | |
2272 | vcpu->arch.st.last_steal = current->sched_info.run_delay; | |
35f3fae1 | 2273 | |
4e335d9e | 2274 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
35f3fae1 WL |
2275 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); |
2276 | ||
2277 | smp_wmb(); | |
2278 | ||
2279 | vcpu->arch.st.steal.version += 1; | |
c9aaa895 | 2280 | |
4e335d9e | 2281 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
c9aaa895 GC |
2282 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); |
2283 | } | |
2284 | ||
8fe8ab46 | 2285 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
15c4a640 | 2286 | { |
5753785f | 2287 | bool pr = false; |
8fe8ab46 WA |
2288 | u32 msr = msr_info->index; |
2289 | u64 data = msr_info->data; | |
5753785f | 2290 | |
15c4a640 | 2291 | switch (msr) { |
2e32b719 | 2292 | case MSR_AMD64_NB_CFG: |
2e32b719 BP |
2293 | case MSR_IA32_UCODE_WRITE: |
2294 | case MSR_VM_HSAVE_PA: | |
2295 | case MSR_AMD64_PATCH_LOADER: | |
2296 | case MSR_AMD64_BU_CFG2: | |
405a353a | 2297 | case MSR_AMD64_DC_CFG: |
2e32b719 BP |
2298 | break; |
2299 | ||
518e7b94 WL |
2300 | case MSR_IA32_UCODE_REV: |
2301 | if (msr_info->host_initiated) | |
2302 | vcpu->arch.microcode_version = data; | |
2303 | break; | |
15c4a640 | 2304 | case MSR_EFER: |
b69e8cae | 2305 | return set_efer(vcpu, data); |
8f1589d9 AP |
2306 | case MSR_K7_HWCR: |
2307 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
82494028 | 2308 | data &= ~(u64)0x100; /* ignore ignne emulation enable */ |
a223c313 | 2309 | data &= ~(u64)0x8; /* ignore TLB cache disable */ |
22d48b2d | 2310 | data &= ~(u64)0x40000; /* ignore Mc status write enable */ |
8f1589d9 | 2311 | if (data != 0) { |
a737f256 CD |
2312 | vcpu_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", |
2313 | data); | |
8f1589d9 AP |
2314 | return 1; |
2315 | } | |
15c4a640 | 2316 | break; |
f7c6d140 AP |
2317 | case MSR_FAM10H_MMIO_CONF_BASE: |
2318 | if (data != 0) { | |
a737f256 CD |
2319 | vcpu_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " |
2320 | "0x%llx\n", data); | |
f7c6d140 AP |
2321 | return 1; |
2322 | } | |
15c4a640 | 2323 | break; |
b5e2fec0 AG |
2324 | case MSR_IA32_DEBUGCTLMSR: |
2325 | if (!data) { | |
2326 | /* We support the non-activated case already */ | |
2327 | break; | |
2328 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
2329 | /* Values other than LBR and BTF are vendor-specific, | |
2330 | thus reserved and should throw a #GP */ | |
2331 | return 1; | |
2332 | } | |
a737f256 CD |
2333 | vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", |
2334 | __func__, data); | |
b5e2fec0 | 2335 | break; |
9ba075a6 | 2336 | case 0x200 ... 0x2ff: |
ff53604b | 2337 | return kvm_mtrr_set_msr(vcpu, msr, data); |
15c4a640 | 2338 | case MSR_IA32_APICBASE: |
58cb628d | 2339 | return kvm_set_apic_base(vcpu, msr_info); |
0105d1a5 GN |
2340 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
2341 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
a3e06bbe LJ |
2342 | case MSR_IA32_TSCDEADLINE: |
2343 | kvm_set_lapic_tscdeadline_msr(vcpu, data); | |
2344 | break; | |
ba904635 | 2345 | case MSR_IA32_TSC_ADJUST: |
d6321d49 | 2346 | if (guest_cpuid_has(vcpu, X86_FEATURE_TSC_ADJUST)) { |
ba904635 | 2347 | if (!msr_info->host_initiated) { |
d913b904 | 2348 | s64 adj = data - vcpu->arch.ia32_tsc_adjust_msr; |
d7add054 | 2349 | adjust_tsc_offset_guest(vcpu, adj); |
ba904635 WA |
2350 | } |
2351 | vcpu->arch.ia32_tsc_adjust_msr = data; | |
2352 | } | |
2353 | break; | |
15c4a640 | 2354 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 2355 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 2356 | break; |
64d60670 PB |
2357 | case MSR_IA32_SMBASE: |
2358 | if (!msr_info->host_initiated) | |
2359 | return 1; | |
2360 | vcpu->arch.smbase = data; | |
2361 | break; | |
52797bf9 LA |
2362 | case MSR_SMI_COUNT: |
2363 | if (!msr_info->host_initiated) | |
2364 | return 1; | |
2365 | vcpu->arch.smi_count = data; | |
2366 | break; | |
11c6bffa | 2367 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
2368 | case MSR_KVM_WALL_CLOCK: |
2369 | vcpu->kvm->arch.wall_clock = data; | |
2370 | kvm_write_wall_clock(vcpu->kvm, data); | |
2371 | break; | |
11c6bffa | 2372 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 | 2373 | case MSR_KVM_SYSTEM_TIME: { |
54750f2c MT |
2374 | struct kvm_arch *ka = &vcpu->kvm->arch; |
2375 | ||
12f9a48f | 2376 | kvmclock_reset(vcpu); |
18068523 | 2377 | |
54750f2c MT |
2378 | if (vcpu->vcpu_id == 0 && !msr_info->host_initiated) { |
2379 | bool tmp = (msr == MSR_KVM_SYSTEM_TIME); | |
2380 | ||
2381 | if (ka->boot_vcpu_runs_old_kvmclock != tmp) | |
1bd2009e | 2382 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
54750f2c MT |
2383 | |
2384 | ka->boot_vcpu_runs_old_kvmclock = tmp; | |
2385 | } | |
2386 | ||
18068523 | 2387 | vcpu->arch.time = data; |
0061d53d | 2388 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
18068523 GOC |
2389 | |
2390 | /* we verify if the enable bit is set... */ | |
2391 | if (!(data & 1)) | |
2392 | break; | |
2393 | ||
4e335d9e | 2394 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, |
8f964525 AH |
2395 | &vcpu->arch.pv_time, data & ~1ULL, |
2396 | sizeof(struct pvclock_vcpu_time_info))) | |
0b79459b AH |
2397 | vcpu->arch.pv_time_enabled = false; |
2398 | else | |
2399 | vcpu->arch.pv_time_enabled = true; | |
32cad84f | 2400 | |
18068523 GOC |
2401 | break; |
2402 | } | |
344d9588 GN |
2403 | case MSR_KVM_ASYNC_PF_EN: |
2404 | if (kvm_pv_enable_async_pf(vcpu, data)) | |
2405 | return 1; | |
2406 | break; | |
c9aaa895 GC |
2407 | case MSR_KVM_STEAL_TIME: |
2408 | ||
2409 | if (unlikely(!sched_info_on())) | |
2410 | return 1; | |
2411 | ||
2412 | if (data & KVM_STEAL_RESERVED_MASK) | |
2413 | return 1; | |
2414 | ||
4e335d9e | 2415 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.st.stime, |
8f964525 AH |
2416 | data & KVM_STEAL_VALID_BITS, |
2417 | sizeof(struct kvm_steal_time))) | |
c9aaa895 GC |
2418 | return 1; |
2419 | ||
2420 | vcpu->arch.st.msr_val = data; | |
2421 | ||
2422 | if (!(data & KVM_MSR_ENABLED)) | |
2423 | break; | |
2424 | ||
c9aaa895 GC |
2425 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); |
2426 | ||
2427 | break; | |
ae7a2a3f MT |
2428 | case MSR_KVM_PV_EOI_EN: |
2429 | if (kvm_lapic_enable_pv_eoi(vcpu, data)) | |
2430 | return 1; | |
2431 | break; | |
c9aaa895 | 2432 | |
890ca9ae HY |
2433 | case MSR_IA32_MCG_CTL: |
2434 | case MSR_IA32_MCG_STATUS: | |
81760dcc | 2435 | case MSR_IA32_MC0_CTL ... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS) - 1: |
9ffd986c | 2436 | return set_msr_mce(vcpu, msr_info); |
71db6023 | 2437 | |
6912ac32 WH |
2438 | case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3: |
2439 | case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1: | |
2440 | pr = true; /* fall through */ | |
2441 | case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3: | |
2442 | case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1: | |
c6702c9d | 2443 | if (kvm_pmu_is_valid_msr(vcpu, msr)) |
afd80d85 | 2444 | return kvm_pmu_set_msr(vcpu, msr_info); |
5753785f GN |
2445 | |
2446 | if (pr || data != 0) | |
a737f256 CD |
2447 | vcpu_unimpl(vcpu, "disabled perfctr wrmsr: " |
2448 | "0x%x data 0x%llx\n", msr, data); | |
5753785f | 2449 | break; |
84e0cefa JS |
2450 | case MSR_K7_CLK_CTL: |
2451 | /* | |
2452 | * Ignore all writes to this no longer documented MSR. | |
2453 | * Writes are only relevant for old K7 processors, | |
2454 | * all pre-dating SVM, but a recommended workaround from | |
4a969980 | 2455 | * AMD for these chips. It is possible to specify the |
84e0cefa JS |
2456 | * affected processor models on the command line, hence |
2457 | * the need to ignore the workaround. | |
2458 | */ | |
2459 | break; | |
55cd8e5a | 2460 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
e7d9513b AS |
2461 | case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: |
2462 | case HV_X64_MSR_CRASH_CTL: | |
1f4b34f8 | 2463 | case HV_X64_MSR_STIMER0_CONFIG ... HV_X64_MSR_STIMER3_COUNT: |
a2e164e7 VK |
2464 | case HV_X64_MSR_REENLIGHTENMENT_CONTROL: |
2465 | case HV_X64_MSR_TSC_EMULATION_CONTROL: | |
2466 | case HV_X64_MSR_TSC_EMULATION_STATUS: | |
e7d9513b AS |
2467 | return kvm_hv_set_msr_common(vcpu, msr, data, |
2468 | msr_info->host_initiated); | |
91c9c3ed | 2469 | case MSR_IA32_BBL_CR_CTL3: |
2470 | /* Drop writes to this legacy MSR -- see rdmsr | |
2471 | * counterpart for further detail. | |
2472 | */ | |
fab0aa3b EM |
2473 | if (report_ignored_msrs) |
2474 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data 0x%llx\n", | |
2475 | msr, data); | |
91c9c3ed | 2476 | break; |
2b036c6b | 2477 | case MSR_AMD64_OSVW_ID_LENGTH: |
d6321d49 | 2478 | if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW)) |
2b036c6b BO |
2479 | return 1; |
2480 | vcpu->arch.osvw.length = data; | |
2481 | break; | |
2482 | case MSR_AMD64_OSVW_STATUS: | |
d6321d49 | 2483 | if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW)) |
2b036c6b BO |
2484 | return 1; |
2485 | vcpu->arch.osvw.status = data; | |
2486 | break; | |
db2336a8 KH |
2487 | case MSR_PLATFORM_INFO: |
2488 | if (!msr_info->host_initiated || | |
2489 | data & ~MSR_PLATFORM_INFO_CPUID_FAULT || | |
2490 | (!(data & MSR_PLATFORM_INFO_CPUID_FAULT) && | |
2491 | cpuid_fault_enabled(vcpu))) | |
2492 | return 1; | |
2493 | vcpu->arch.msr_platform_info = data; | |
2494 | break; | |
2495 | case MSR_MISC_FEATURES_ENABLES: | |
2496 | if (data & ~MSR_MISC_FEATURES_ENABLES_CPUID_FAULT || | |
2497 | (data & MSR_MISC_FEATURES_ENABLES_CPUID_FAULT && | |
2498 | !supports_cpuid_fault(vcpu))) | |
2499 | return 1; | |
2500 | vcpu->arch.msr_misc_features_enables = data; | |
2501 | break; | |
15c4a640 | 2502 | default: |
ffde22ac ES |
2503 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
2504 | return xen_hvm_config(vcpu, data); | |
c6702c9d | 2505 | if (kvm_pmu_is_valid_msr(vcpu, msr)) |
afd80d85 | 2506 | return kvm_pmu_set_msr(vcpu, msr_info); |
ed85c068 | 2507 | if (!ignore_msrs) { |
ae0f5499 | 2508 | vcpu_debug_ratelimited(vcpu, "unhandled wrmsr: 0x%x data 0x%llx\n", |
a737f256 | 2509 | msr, data); |
ed85c068 AP |
2510 | return 1; |
2511 | } else { | |
fab0aa3b EM |
2512 | if (report_ignored_msrs) |
2513 | vcpu_unimpl(vcpu, | |
2514 | "ignored wrmsr: 0x%x data 0x%llx\n", | |
2515 | msr, data); | |
ed85c068 AP |
2516 | break; |
2517 | } | |
15c4a640 CO |
2518 | } |
2519 | return 0; | |
2520 | } | |
2521 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
2522 | ||
2523 | ||
2524 | /* | |
2525 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
2526 | * Returns 0 on success, non-0 otherwise. | |
2527 | * Assumes vcpu_load() was already called. | |
2528 | */ | |
609e36d3 | 2529 | int kvm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
15c4a640 | 2530 | { |
609e36d3 | 2531 | return kvm_x86_ops->get_msr(vcpu, msr); |
15c4a640 | 2532 | } |
ff651cb6 | 2533 | EXPORT_SYMBOL_GPL(kvm_get_msr); |
15c4a640 | 2534 | |
890ca9ae | 2535 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
2536 | { |
2537 | u64 data; | |
890ca9ae HY |
2538 | u64 mcg_cap = vcpu->arch.mcg_cap; |
2539 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
2540 | |
2541 | switch (msr) { | |
15c4a640 CO |
2542 | case MSR_IA32_P5_MC_ADDR: |
2543 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
2544 | data = 0; |
2545 | break; | |
15c4a640 | 2546 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
2547 | data = vcpu->arch.mcg_cap; |
2548 | break; | |
c7ac679c | 2549 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
2550 | if (!(mcg_cap & MCG_CTL_P)) |
2551 | return 1; | |
2552 | data = vcpu->arch.mcg_ctl; | |
2553 | break; | |
2554 | case MSR_IA32_MCG_STATUS: | |
2555 | data = vcpu->arch.mcg_status; | |
2556 | break; | |
2557 | default: | |
2558 | if (msr >= MSR_IA32_MC0_CTL && | |
81760dcc | 2559 | msr < MSR_IA32_MCx_CTL(bank_num)) { |
890ca9ae HY |
2560 | u32 offset = msr - MSR_IA32_MC0_CTL; |
2561 | data = vcpu->arch.mce_banks[offset]; | |
2562 | break; | |
2563 | } | |
2564 | return 1; | |
2565 | } | |
2566 | *pdata = data; | |
2567 | return 0; | |
2568 | } | |
2569 | ||
609e36d3 | 2570 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
890ca9ae | 2571 | { |
609e36d3 | 2572 | switch (msr_info->index) { |
890ca9ae | 2573 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 2574 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
2575 | case MSR_IA32_DEBUGCTLMSR: |
2576 | case MSR_IA32_LASTBRANCHFROMIP: | |
2577 | case MSR_IA32_LASTBRANCHTOIP: | |
2578 | case MSR_IA32_LASTINTFROMIP: | |
2579 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd | 2580 | case MSR_K8_SYSCFG: |
3afb1121 PB |
2581 | case MSR_K8_TSEG_ADDR: |
2582 | case MSR_K8_TSEG_MASK: | |
60af2ecd | 2583 | case MSR_K7_HWCR: |
61a6bd67 | 2584 | case MSR_VM_HSAVE_PA: |
1fdbd48c | 2585 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 2586 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 2587 | case MSR_FAM10H_MMIO_CONF_BASE: |
2e32b719 | 2588 | case MSR_AMD64_BU_CFG2: |
0c2df2a1 | 2589 | case MSR_IA32_PERF_CTL: |
405a353a | 2590 | case MSR_AMD64_DC_CFG: |
609e36d3 | 2591 | msr_info->data = 0; |
15c4a640 | 2592 | break; |
c51eb52b | 2593 | case MSR_F15H_PERF_CTL0 ... MSR_F15H_PERF_CTR5: |
6912ac32 WH |
2594 | case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3: |
2595 | case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3: | |
2596 | case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1: | |
2597 | case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1: | |
c6702c9d | 2598 | if (kvm_pmu_is_valid_msr(vcpu, msr_info->index)) |
609e36d3 PB |
2599 | return kvm_pmu_get_msr(vcpu, msr_info->index, &msr_info->data); |
2600 | msr_info->data = 0; | |
5753785f | 2601 | break; |
742bc670 | 2602 | case MSR_IA32_UCODE_REV: |
518e7b94 | 2603 | msr_info->data = vcpu->arch.microcode_version; |
742bc670 | 2604 | break; |
9ba075a6 | 2605 | case MSR_MTRRcap: |
9ba075a6 | 2606 | case 0x200 ... 0x2ff: |
ff53604b | 2607 | return kvm_mtrr_get_msr(vcpu, msr_info->index, &msr_info->data); |
15c4a640 | 2608 | case 0xcd: /* fsb frequency */ |
609e36d3 | 2609 | msr_info->data = 3; |
15c4a640 | 2610 | break; |
7b914098 JS |
2611 | /* |
2612 | * MSR_EBC_FREQUENCY_ID | |
2613 | * Conservative value valid for even the basic CPU models. | |
2614 | * Models 0,1: 000 in bits 23:21 indicating a bus speed of | |
2615 | * 100MHz, model 2 000 in bits 18:16 indicating 100MHz, | |
2616 | * and 266MHz for model 3, or 4. Set Core Clock | |
2617 | * Frequency to System Bus Frequency Ratio to 1 (bits | |
2618 | * 31:24) even though these are only valid for CPU | |
2619 | * models > 2, however guests may end up dividing or | |
2620 | * multiplying by zero otherwise. | |
2621 | */ | |
2622 | case MSR_EBC_FREQUENCY_ID: | |
609e36d3 | 2623 | msr_info->data = 1 << 24; |
7b914098 | 2624 | break; |
15c4a640 | 2625 | case MSR_IA32_APICBASE: |
609e36d3 | 2626 | msr_info->data = kvm_get_apic_base(vcpu); |
15c4a640 | 2627 | break; |
0105d1a5 | 2628 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
609e36d3 | 2629 | return kvm_x2apic_msr_read(vcpu, msr_info->index, &msr_info->data); |
0105d1a5 | 2630 | break; |
a3e06bbe | 2631 | case MSR_IA32_TSCDEADLINE: |
609e36d3 | 2632 | msr_info->data = kvm_get_lapic_tscdeadline_msr(vcpu); |
a3e06bbe | 2633 | break; |
ba904635 | 2634 | case MSR_IA32_TSC_ADJUST: |
609e36d3 | 2635 | msr_info->data = (u64)vcpu->arch.ia32_tsc_adjust_msr; |
ba904635 | 2636 | break; |
15c4a640 | 2637 | case MSR_IA32_MISC_ENABLE: |
609e36d3 | 2638 | msr_info->data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 2639 | break; |
64d60670 PB |
2640 | case MSR_IA32_SMBASE: |
2641 | if (!msr_info->host_initiated) | |
2642 | return 1; | |
2643 | msr_info->data = vcpu->arch.smbase; | |
15c4a640 | 2644 | break; |
52797bf9 LA |
2645 | case MSR_SMI_COUNT: |
2646 | msr_info->data = vcpu->arch.smi_count; | |
2647 | break; | |
847f0ad8 AG |
2648 | case MSR_IA32_PERF_STATUS: |
2649 | /* TSC increment by tick */ | |
609e36d3 | 2650 | msr_info->data = 1000ULL; |
847f0ad8 | 2651 | /* CPU multiplier */ |
b0996ae4 | 2652 | msr_info->data |= (((uint64_t)4ULL) << 40); |
847f0ad8 | 2653 | break; |
15c4a640 | 2654 | case MSR_EFER: |
609e36d3 | 2655 | msr_info->data = vcpu->arch.efer; |
15c4a640 | 2656 | break; |
18068523 | 2657 | case MSR_KVM_WALL_CLOCK: |
11c6bffa | 2658 | case MSR_KVM_WALL_CLOCK_NEW: |
609e36d3 | 2659 | msr_info->data = vcpu->kvm->arch.wall_clock; |
18068523 GOC |
2660 | break; |
2661 | case MSR_KVM_SYSTEM_TIME: | |
11c6bffa | 2662 | case MSR_KVM_SYSTEM_TIME_NEW: |
609e36d3 | 2663 | msr_info->data = vcpu->arch.time; |
18068523 | 2664 | break; |
344d9588 | 2665 | case MSR_KVM_ASYNC_PF_EN: |
609e36d3 | 2666 | msr_info->data = vcpu->arch.apf.msr_val; |
344d9588 | 2667 | break; |
c9aaa895 | 2668 | case MSR_KVM_STEAL_TIME: |
609e36d3 | 2669 | msr_info->data = vcpu->arch.st.msr_val; |
c9aaa895 | 2670 | break; |
1d92128f | 2671 | case MSR_KVM_PV_EOI_EN: |
609e36d3 | 2672 | msr_info->data = vcpu->arch.pv_eoi.msr_val; |
1d92128f | 2673 | break; |
890ca9ae HY |
2674 | case MSR_IA32_P5_MC_ADDR: |
2675 | case MSR_IA32_P5_MC_TYPE: | |
2676 | case MSR_IA32_MCG_CAP: | |
2677 | case MSR_IA32_MCG_CTL: | |
2678 | case MSR_IA32_MCG_STATUS: | |
81760dcc | 2679 | case MSR_IA32_MC0_CTL ... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS) - 1: |
609e36d3 | 2680 | return get_msr_mce(vcpu, msr_info->index, &msr_info->data); |
84e0cefa JS |
2681 | case MSR_K7_CLK_CTL: |
2682 | /* | |
2683 | * Provide expected ramp-up count for K7. All other | |
2684 | * are set to zero, indicating minimum divisors for | |
2685 | * every field. | |
2686 | * | |
2687 | * This prevents guest kernels on AMD host with CPU | |
2688 | * type 6, model 8 and higher from exploding due to | |
2689 | * the rdmsr failing. | |
2690 | */ | |
609e36d3 | 2691 | msr_info->data = 0x20000000; |
84e0cefa | 2692 | break; |
55cd8e5a | 2693 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
e7d9513b AS |
2694 | case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: |
2695 | case HV_X64_MSR_CRASH_CTL: | |
1f4b34f8 | 2696 | case HV_X64_MSR_STIMER0_CONFIG ... HV_X64_MSR_STIMER3_COUNT: |
a2e164e7 VK |
2697 | case HV_X64_MSR_REENLIGHTENMENT_CONTROL: |
2698 | case HV_X64_MSR_TSC_EMULATION_CONTROL: | |
2699 | case HV_X64_MSR_TSC_EMULATION_STATUS: | |
e83d5887 AS |
2700 | return kvm_hv_get_msr_common(vcpu, |
2701 | msr_info->index, &msr_info->data); | |
55cd8e5a | 2702 | break; |
91c9c3ed | 2703 | case MSR_IA32_BBL_CR_CTL3: |
2704 | /* This legacy MSR exists but isn't fully documented in current | |
2705 | * silicon. It is however accessed by winxp in very narrow | |
2706 | * scenarios where it sets bit #19, itself documented as | |
2707 | * a "reserved" bit. Best effort attempt to source coherent | |
2708 | * read data here should the balance of the register be | |
2709 | * interpreted by the guest: | |
2710 | * | |
2711 | * L2 cache control register 3: 64GB range, 256KB size, | |
2712 | * enabled, latency 0x1, configured | |
2713 | */ | |
609e36d3 | 2714 | msr_info->data = 0xbe702111; |
91c9c3ed | 2715 | break; |
2b036c6b | 2716 | case MSR_AMD64_OSVW_ID_LENGTH: |
d6321d49 | 2717 | if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW)) |
2b036c6b | 2718 | return 1; |
609e36d3 | 2719 | msr_info->data = vcpu->arch.osvw.length; |
2b036c6b BO |
2720 | break; |
2721 | case MSR_AMD64_OSVW_STATUS: | |
d6321d49 | 2722 | if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW)) |
2b036c6b | 2723 | return 1; |
609e36d3 | 2724 | msr_info->data = vcpu->arch.osvw.status; |
2b036c6b | 2725 | break; |
db2336a8 KH |
2726 | case MSR_PLATFORM_INFO: |
2727 | msr_info->data = vcpu->arch.msr_platform_info; | |
2728 | break; | |
2729 | case MSR_MISC_FEATURES_ENABLES: | |
2730 | msr_info->data = vcpu->arch.msr_misc_features_enables; | |
2731 | break; | |
15c4a640 | 2732 | default: |
c6702c9d | 2733 | if (kvm_pmu_is_valid_msr(vcpu, msr_info->index)) |
609e36d3 | 2734 | return kvm_pmu_get_msr(vcpu, msr_info->index, &msr_info->data); |
ed85c068 | 2735 | if (!ignore_msrs) { |
ae0f5499 BD |
2736 | vcpu_debug_ratelimited(vcpu, "unhandled rdmsr: 0x%x\n", |
2737 | msr_info->index); | |
ed85c068 AP |
2738 | return 1; |
2739 | } else { | |
fab0aa3b EM |
2740 | if (report_ignored_msrs) |
2741 | vcpu_unimpl(vcpu, "ignored rdmsr: 0x%x\n", | |
2742 | msr_info->index); | |
609e36d3 | 2743 | msr_info->data = 0; |
ed85c068 AP |
2744 | } |
2745 | break; | |
15c4a640 | 2746 | } |
15c4a640 CO |
2747 | return 0; |
2748 | } | |
2749 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
2750 | ||
313a3dc7 CO |
2751 | /* |
2752 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
2753 | * | |
2754 | * @return number of msrs set successfully. | |
2755 | */ | |
2756 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
2757 | struct kvm_msr_entry *entries, | |
2758 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2759 | unsigned index, u64 *data)) | |
2760 | { | |
801e459a | 2761 | int i; |
313a3dc7 | 2762 | |
313a3dc7 CO |
2763 | for (i = 0; i < msrs->nmsrs; ++i) |
2764 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2765 | break; | |
2766 | ||
313a3dc7 CO |
2767 | return i; |
2768 | } | |
2769 | ||
2770 | /* | |
2771 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2772 | * | |
2773 | * @return number of msrs set successfully. | |
2774 | */ | |
2775 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
2776 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2777 | unsigned index, u64 *data), | |
2778 | int writeback) | |
2779 | { | |
2780 | struct kvm_msrs msrs; | |
2781 | struct kvm_msr_entry *entries; | |
2782 | int r, n; | |
2783 | unsigned size; | |
2784 | ||
2785 | r = -EFAULT; | |
2786 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
2787 | goto out; | |
2788 | ||
2789 | r = -E2BIG; | |
2790 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2791 | goto out; | |
2792 | ||
313a3dc7 | 2793 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; |
ff5c2c03 SL |
2794 | entries = memdup_user(user_msrs->entries, size); |
2795 | if (IS_ERR(entries)) { | |
2796 | r = PTR_ERR(entries); | |
313a3dc7 | 2797 | goto out; |
ff5c2c03 | 2798 | } |
313a3dc7 CO |
2799 | |
2800 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
2801 | if (r < 0) | |
2802 | goto out_free; | |
2803 | ||
2804 | r = -EFAULT; | |
2805 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2806 | goto out_free; | |
2807 | ||
2808 | r = n; | |
2809 | ||
2810 | out_free: | |
7a73c028 | 2811 | kfree(entries); |
313a3dc7 CO |
2812 | out: |
2813 | return r; | |
2814 | } | |
2815 | ||
784aa3d7 | 2816 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
018d00d2 ZX |
2817 | { |
2818 | int r; | |
2819 | ||
2820 | switch (ext) { | |
2821 | case KVM_CAP_IRQCHIP: | |
2822 | case KVM_CAP_HLT: | |
2823 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 2824 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 2825 | case KVM_CAP_EXT_CPUID: |
9c15bb1d | 2826 | case KVM_CAP_EXT_EMUL_CPUID: |
c8076604 | 2827 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 2828 | case KVM_CAP_PIT: |
a28e4f5a | 2829 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 2830 | case KVM_CAP_MP_STATE: |
ed848624 | 2831 | case KVM_CAP_SYNC_MMU: |
a355c85c | 2832 | case KVM_CAP_USER_NMI: |
52d939a0 | 2833 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 2834 | case KVM_CAP_IRQ_INJECT_STATUS: |
d34e6b17 | 2835 | case KVM_CAP_IOEVENTFD: |
f848a5a8 | 2836 | case KVM_CAP_IOEVENTFD_NO_LENGTH: |
c5ff41ce | 2837 | case KVM_CAP_PIT2: |
e9f42757 | 2838 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 2839 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 2840 | case KVM_CAP_XEN_HVM: |
3cfc3092 | 2841 | case KVM_CAP_VCPU_EVENTS: |
55cd8e5a | 2842 | case KVM_CAP_HYPERV: |
10388a07 | 2843 | case KVM_CAP_HYPERV_VAPIC: |
c25bc163 | 2844 | case KVM_CAP_HYPERV_SPIN: |
5c919412 | 2845 | case KVM_CAP_HYPERV_SYNIC: |
efc479e6 | 2846 | case KVM_CAP_HYPERV_SYNIC2: |
d3457c87 | 2847 | case KVM_CAP_HYPERV_VP_INDEX: |
faeb7833 | 2848 | case KVM_CAP_HYPERV_EVENTFD: |
ab9f4ecb | 2849 | case KVM_CAP_PCI_SEGMENT: |
a1efbe77 | 2850 | case KVM_CAP_DEBUGREGS: |
d2be1651 | 2851 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
2d5b5a66 | 2852 | case KVM_CAP_XSAVE: |
344d9588 | 2853 | case KVM_CAP_ASYNC_PF: |
92a1f12d | 2854 | case KVM_CAP_GET_TSC_KHZ: |
1c0b28c2 | 2855 | case KVM_CAP_KVMCLOCK_CTRL: |
4d8b81ab | 2856 | case KVM_CAP_READONLY_MEM: |
5f66b620 | 2857 | case KVM_CAP_HYPERV_TIME: |
100943c5 | 2858 | case KVM_CAP_IOAPIC_POLARITY_IGNORED: |
defcf51f | 2859 | case KVM_CAP_TSC_DEADLINE_TIMER: |
90de4a18 NA |
2860 | case KVM_CAP_ENABLE_CAP_VM: |
2861 | case KVM_CAP_DISABLE_QUIRKS: | |
d71ba788 | 2862 | case KVM_CAP_SET_BOOT_CPU_ID: |
49df6397 | 2863 | case KVM_CAP_SPLIT_IRQCHIP: |
460df4c1 | 2864 | case KVM_CAP_IMMEDIATE_EXIT: |
801e459a | 2865 | case KVM_CAP_GET_MSR_FEATURES: |
018d00d2 ZX |
2866 | r = 1; |
2867 | break; | |
01643c51 KH |
2868 | case KVM_CAP_SYNC_REGS: |
2869 | r = KVM_SYNC_X86_VALID_FIELDS; | |
2870 | break; | |
e3fd9a93 PB |
2871 | case KVM_CAP_ADJUST_CLOCK: |
2872 | r = KVM_CLOCK_TSC_STABLE; | |
2873 | break; | |
668fffa3 MT |
2874 | case KVM_CAP_X86_GUEST_MWAIT: |
2875 | r = kvm_mwait_in_guest(); | |
2876 | break; | |
6d396b55 PB |
2877 | case KVM_CAP_X86_SMM: |
2878 | /* SMBASE is usually relocated above 1M on modern chipsets, | |
2879 | * and SMM handlers might indeed rely on 4G segment limits, | |
2880 | * so do not report SMM to be available if real mode is | |
2881 | * emulated via vm86 mode. Still, do not go to great lengths | |
2882 | * to avoid userspace's usage of the feature, because it is a | |
2883 | * fringe case that is not enabled except via specific settings | |
2884 | * of the module parameters. | |
2885 | */ | |
2886 | r = kvm_x86_ops->cpu_has_high_real_mode_segbase(); | |
2887 | break; | |
774ead3a AK |
2888 | case KVM_CAP_VAPIC: |
2889 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
2890 | break; | |
f725230a | 2891 | case KVM_CAP_NR_VCPUS: |
8c3ba334 SL |
2892 | r = KVM_SOFT_MAX_VCPUS; |
2893 | break; | |
2894 | case KVM_CAP_MAX_VCPUS: | |
f725230a AK |
2895 | r = KVM_MAX_VCPUS; |
2896 | break; | |
a988b910 | 2897 | case KVM_CAP_NR_MEMSLOTS: |
bbacc0c1 | 2898 | r = KVM_USER_MEM_SLOTS; |
a988b910 | 2899 | break; |
a68a6a72 MT |
2900 | case KVM_CAP_PV_MMU: /* obsolete */ |
2901 | r = 0; | |
2f333bcb | 2902 | break; |
890ca9ae HY |
2903 | case KVM_CAP_MCE: |
2904 | r = KVM_MAX_MCE_BANKS; | |
2905 | break; | |
2d5b5a66 | 2906 | case KVM_CAP_XCRS: |
d366bf7e | 2907 | r = boot_cpu_has(X86_FEATURE_XSAVE); |
2d5b5a66 | 2908 | break; |
92a1f12d JR |
2909 | case KVM_CAP_TSC_CONTROL: |
2910 | r = kvm_has_tsc_control; | |
2911 | break; | |
37131313 RK |
2912 | case KVM_CAP_X2APIC_API: |
2913 | r = KVM_X2APIC_API_VALID_FLAGS; | |
2914 | break; | |
018d00d2 ZX |
2915 | default: |
2916 | r = 0; | |
2917 | break; | |
2918 | } | |
2919 | return r; | |
2920 | ||
2921 | } | |
2922 | ||
043405e1 CO |
2923 | long kvm_arch_dev_ioctl(struct file *filp, |
2924 | unsigned int ioctl, unsigned long arg) | |
2925 | { | |
2926 | void __user *argp = (void __user *)arg; | |
2927 | long r; | |
2928 | ||
2929 | switch (ioctl) { | |
2930 | case KVM_GET_MSR_INDEX_LIST: { | |
2931 | struct kvm_msr_list __user *user_msr_list = argp; | |
2932 | struct kvm_msr_list msr_list; | |
2933 | unsigned n; | |
2934 | ||
2935 | r = -EFAULT; | |
2936 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
2937 | goto out; | |
2938 | n = msr_list.nmsrs; | |
62ef68bb | 2939 | msr_list.nmsrs = num_msrs_to_save + num_emulated_msrs; |
043405e1 CO |
2940 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
2941 | goto out; | |
2942 | r = -E2BIG; | |
e125e7b6 | 2943 | if (n < msr_list.nmsrs) |
043405e1 CO |
2944 | goto out; |
2945 | r = -EFAULT; | |
2946 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
2947 | num_msrs_to_save * sizeof(u32))) | |
2948 | goto out; | |
e125e7b6 | 2949 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 | 2950 | &emulated_msrs, |
62ef68bb | 2951 | num_emulated_msrs * sizeof(u32))) |
043405e1 CO |
2952 | goto out; |
2953 | r = 0; | |
2954 | break; | |
2955 | } | |
9c15bb1d BP |
2956 | case KVM_GET_SUPPORTED_CPUID: |
2957 | case KVM_GET_EMULATED_CPUID: { | |
674eea0f AK |
2958 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
2959 | struct kvm_cpuid2 cpuid; | |
2960 | ||
2961 | r = -EFAULT; | |
2962 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2963 | goto out; | |
9c15bb1d BP |
2964 | |
2965 | r = kvm_dev_ioctl_get_cpuid(&cpuid, cpuid_arg->entries, | |
2966 | ioctl); | |
674eea0f AK |
2967 | if (r) |
2968 | goto out; | |
2969 | ||
2970 | r = -EFAULT; | |
2971 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2972 | goto out; | |
2973 | r = 0; | |
2974 | break; | |
2975 | } | |
890ca9ae | 2976 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
890ca9ae | 2977 | r = -EFAULT; |
c45dcc71 AR |
2978 | if (copy_to_user(argp, &kvm_mce_cap_supported, |
2979 | sizeof(kvm_mce_cap_supported))) | |
890ca9ae HY |
2980 | goto out; |
2981 | r = 0; | |
2982 | break; | |
801e459a TL |
2983 | case KVM_GET_MSR_FEATURE_INDEX_LIST: { |
2984 | struct kvm_msr_list __user *user_msr_list = argp; | |
2985 | struct kvm_msr_list msr_list; | |
2986 | unsigned int n; | |
2987 | ||
2988 | r = -EFAULT; | |
2989 | if (copy_from_user(&msr_list, user_msr_list, sizeof(msr_list))) | |
2990 | goto out; | |
2991 | n = msr_list.nmsrs; | |
2992 | msr_list.nmsrs = num_msr_based_features; | |
2993 | if (copy_to_user(user_msr_list, &msr_list, sizeof(msr_list))) | |
2994 | goto out; | |
2995 | r = -E2BIG; | |
2996 | if (n < msr_list.nmsrs) | |
2997 | goto out; | |
2998 | r = -EFAULT; | |
2999 | if (copy_to_user(user_msr_list->indices, &msr_based_features, | |
3000 | num_msr_based_features * sizeof(u32))) | |
3001 | goto out; | |
3002 | r = 0; | |
3003 | break; | |
3004 | } | |
3005 | case KVM_GET_MSRS: | |
3006 | r = msr_io(NULL, argp, do_get_msr_feature, 1); | |
3007 | break; | |
890ca9ae | 3008 | } |
043405e1 CO |
3009 | default: |
3010 | r = -EINVAL; | |
3011 | } | |
3012 | out: | |
3013 | return r; | |
3014 | } | |
3015 | ||
f5f48ee1 SY |
3016 | static void wbinvd_ipi(void *garbage) |
3017 | { | |
3018 | wbinvd(); | |
3019 | } | |
3020 | ||
3021 | static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
3022 | { | |
e0f0bbc5 | 3023 | return kvm_arch_has_noncoherent_dma(vcpu->kvm); |
f5f48ee1 SY |
3024 | } |
3025 | ||
313a3dc7 CO |
3026 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
3027 | { | |
f5f48ee1 SY |
3028 | /* Address WBINVD may be executed by guest */ |
3029 | if (need_emulate_wbinvd(vcpu)) { | |
3030 | if (kvm_x86_ops->has_wbinvd_exit()) | |
3031 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
3032 | else if (vcpu->cpu != -1 && vcpu->cpu != cpu) | |
3033 | smp_call_function_single(vcpu->cpu, | |
3034 | wbinvd_ipi, NULL, 1); | |
3035 | } | |
3036 | ||
313a3dc7 | 3037 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
8f6055cb | 3038 | |
0dd6a6ed ZA |
3039 | /* Apply any externally detected TSC adjustments (due to suspend) */ |
3040 | if (unlikely(vcpu->arch.tsc_offset_adjustment)) { | |
3041 | adjust_tsc_offset_host(vcpu, vcpu->arch.tsc_offset_adjustment); | |
3042 | vcpu->arch.tsc_offset_adjustment = 0; | |
105b21bb | 3043 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0dd6a6ed | 3044 | } |
8f6055cb | 3045 | |
b0c39dc6 | 3046 | if (unlikely(vcpu->cpu != cpu) || kvm_check_tsc_unstable()) { |
6f526ec5 | 3047 | s64 tsc_delta = !vcpu->arch.last_host_tsc ? 0 : |
4ea1636b | 3048 | rdtsc() - vcpu->arch.last_host_tsc; |
e48672fa ZA |
3049 | if (tsc_delta < 0) |
3050 | mark_tsc_unstable("KVM discovered backwards TSC"); | |
ce7a058a | 3051 | |
b0c39dc6 | 3052 | if (kvm_check_tsc_unstable()) { |
07c1419a | 3053 | u64 offset = kvm_compute_tsc_offset(vcpu, |
b183aa58 | 3054 | vcpu->arch.last_guest_tsc); |
a545ab6a | 3055 | kvm_vcpu_write_tsc_offset(vcpu, offset); |
c285545f | 3056 | vcpu->arch.tsc_catchup = 1; |
c285545f | 3057 | } |
a749e247 PB |
3058 | |
3059 | if (kvm_lapic_hv_timer_in_use(vcpu)) | |
3060 | kvm_lapic_restart_hv_timer(vcpu); | |
3061 | ||
d98d07ca MT |
3062 | /* |
3063 | * On a host with synchronized TSC, there is no need to update | |
3064 | * kvmclock on vcpu->cpu migration | |
3065 | */ | |
3066 | if (!vcpu->kvm->arch.use_master_clock || vcpu->cpu == -1) | |
0061d53d | 3067 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
c285545f | 3068 | if (vcpu->cpu != cpu) |
1bd2009e | 3069 | kvm_make_request(KVM_REQ_MIGRATE_TIMER, vcpu); |
e48672fa | 3070 | vcpu->cpu = cpu; |
6b7d7e76 | 3071 | } |
c9aaa895 | 3072 | |
c9aaa895 | 3073 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); |
313a3dc7 CO |
3074 | } |
3075 | ||
0b9f6c46 PX |
3076 | static void kvm_steal_time_set_preempted(struct kvm_vcpu *vcpu) |
3077 | { | |
3078 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
3079 | return; | |
3080 | ||
fa55eedd | 3081 | vcpu->arch.st.steal.preempted = KVM_VCPU_PREEMPTED; |
0b9f6c46 | 3082 | |
4e335d9e | 3083 | kvm_write_guest_offset_cached(vcpu->kvm, &vcpu->arch.st.stime, |
0b9f6c46 PX |
3084 | &vcpu->arch.st.steal.preempted, |
3085 | offsetof(struct kvm_steal_time, preempted), | |
3086 | sizeof(vcpu->arch.st.steal.preempted)); | |
3087 | } | |
3088 | ||
313a3dc7 CO |
3089 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
3090 | { | |
cc0d907c | 3091 | int idx; |
de63ad4c LM |
3092 | |
3093 | if (vcpu->preempted) | |
3094 | vcpu->arch.preempted_in_kernel = !kvm_x86_ops->get_cpl(vcpu); | |
3095 | ||
931f261b AA |
3096 | /* |
3097 | * Disable page faults because we're in atomic context here. | |
3098 | * kvm_write_guest_offset_cached() would call might_fault() | |
3099 | * that relies on pagefault_disable() to tell if there's a | |
3100 | * bug. NOTE: the write to guest memory may not go through if | |
3101 | * during postcopy live migration or if there's heavy guest | |
3102 | * paging. | |
3103 | */ | |
3104 | pagefault_disable(); | |
cc0d907c AA |
3105 | /* |
3106 | * kvm_memslots() will be called by | |
3107 | * kvm_write_guest_offset_cached() so take the srcu lock. | |
3108 | */ | |
3109 | idx = srcu_read_lock(&vcpu->kvm->srcu); | |
0b9f6c46 | 3110 | kvm_steal_time_set_preempted(vcpu); |
cc0d907c | 3111 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
931f261b | 3112 | pagefault_enable(); |
02daab21 | 3113 | kvm_x86_ops->vcpu_put(vcpu); |
4ea1636b | 3114 | vcpu->arch.last_host_tsc = rdtsc(); |
efdab992 WL |
3115 | /* |
3116 | * If userspace has set any breakpoints or watchpoints, dr6 is restored | |
3117 | * on every vmexit, but if not, we might have a stale dr6 from the | |
3118 | * guest. do_debug expects dr6 to be cleared after it runs, do the same. | |
3119 | */ | |
3120 | set_debugreg(0, 6); | |
313a3dc7 CO |
3121 | } |
3122 | ||
313a3dc7 CO |
3123 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
3124 | struct kvm_lapic_state *s) | |
3125 | { | |
fa59cc00 | 3126 | if (vcpu->arch.apicv_active) |
d62caabb AS |
3127 | kvm_x86_ops->sync_pir_to_irr(vcpu); |
3128 | ||
a92e2543 | 3129 | return kvm_apic_get_state(vcpu, s); |
313a3dc7 CO |
3130 | } |
3131 | ||
3132 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
3133 | struct kvm_lapic_state *s) | |
3134 | { | |
a92e2543 RK |
3135 | int r; |
3136 | ||
3137 | r = kvm_apic_set_state(vcpu, s); | |
3138 | if (r) | |
3139 | return r; | |
cb142eb7 | 3140 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
3141 | |
3142 | return 0; | |
3143 | } | |
3144 | ||
127a457a MG |
3145 | static int kvm_cpu_accept_dm_intr(struct kvm_vcpu *vcpu) |
3146 | { | |
3147 | return (!lapic_in_kernel(vcpu) || | |
3148 | kvm_apic_accept_pic_intr(vcpu)); | |
3149 | } | |
3150 | ||
782d422b MG |
3151 | /* |
3152 | * if userspace requested an interrupt window, check that the | |
3153 | * interrupt window is open. | |
3154 | * | |
3155 | * No need to exit to userspace if we already have an interrupt queued. | |
3156 | */ | |
3157 | static int kvm_vcpu_ready_for_interrupt_injection(struct kvm_vcpu *vcpu) | |
3158 | { | |
3159 | return kvm_arch_interrupt_allowed(vcpu) && | |
3160 | !kvm_cpu_has_interrupt(vcpu) && | |
3161 | !kvm_event_needs_reinjection(vcpu) && | |
3162 | kvm_cpu_accept_dm_intr(vcpu); | |
3163 | } | |
3164 | ||
f77bc6a4 ZX |
3165 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
3166 | struct kvm_interrupt *irq) | |
3167 | { | |
02cdb50f | 3168 | if (irq->irq >= KVM_NR_INTERRUPTS) |
f77bc6a4 | 3169 | return -EINVAL; |
1c1a9ce9 SR |
3170 | |
3171 | if (!irqchip_in_kernel(vcpu->kvm)) { | |
3172 | kvm_queue_interrupt(vcpu, irq->irq, false); | |
3173 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
3174 | return 0; | |
3175 | } | |
3176 | ||
3177 | /* | |
3178 | * With in-kernel LAPIC, we only use this to inject EXTINT, so | |
3179 | * fail for in-kernel 8259. | |
3180 | */ | |
3181 | if (pic_in_kernel(vcpu->kvm)) | |
f77bc6a4 | 3182 | return -ENXIO; |
f77bc6a4 | 3183 | |
1c1a9ce9 SR |
3184 | if (vcpu->arch.pending_external_vector != -1) |
3185 | return -EEXIST; | |
f77bc6a4 | 3186 | |
1c1a9ce9 | 3187 | vcpu->arch.pending_external_vector = irq->irq; |
934bf653 | 3188 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f77bc6a4 ZX |
3189 | return 0; |
3190 | } | |
3191 | ||
c4abb7c9 JK |
3192 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
3193 | { | |
c4abb7c9 | 3194 | kvm_inject_nmi(vcpu); |
c4abb7c9 JK |
3195 | |
3196 | return 0; | |
3197 | } | |
3198 | ||
f077825a PB |
3199 | static int kvm_vcpu_ioctl_smi(struct kvm_vcpu *vcpu) |
3200 | { | |
64d60670 PB |
3201 | kvm_make_request(KVM_REQ_SMI, vcpu); |
3202 | ||
f077825a PB |
3203 | return 0; |
3204 | } | |
3205 | ||
b209749f AK |
3206 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
3207 | struct kvm_tpr_access_ctl *tac) | |
3208 | { | |
3209 | if (tac->flags) | |
3210 | return -EINVAL; | |
3211 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
3212 | return 0; | |
3213 | } | |
3214 | ||
890ca9ae HY |
3215 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
3216 | u64 mcg_cap) | |
3217 | { | |
3218 | int r; | |
3219 | unsigned bank_num = mcg_cap & 0xff, bank; | |
3220 | ||
3221 | r = -EINVAL; | |
a9e38c3e | 3222 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae | 3223 | goto out; |
c45dcc71 | 3224 | if (mcg_cap & ~(kvm_mce_cap_supported | 0xff | 0xff0000)) |
890ca9ae HY |
3225 | goto out; |
3226 | r = 0; | |
3227 | vcpu->arch.mcg_cap = mcg_cap; | |
3228 | /* Init IA32_MCG_CTL to all 1s */ | |
3229 | if (mcg_cap & MCG_CTL_P) | |
3230 | vcpu->arch.mcg_ctl = ~(u64)0; | |
3231 | /* Init IA32_MCi_CTL to all 1s */ | |
3232 | for (bank = 0; bank < bank_num; bank++) | |
3233 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
c45dcc71 AR |
3234 | |
3235 | if (kvm_x86_ops->setup_mce) | |
3236 | kvm_x86_ops->setup_mce(vcpu); | |
890ca9ae HY |
3237 | out: |
3238 | return r; | |
3239 | } | |
3240 | ||
3241 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
3242 | struct kvm_x86_mce *mce) | |
3243 | { | |
3244 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
3245 | unsigned bank_num = mcg_cap & 0xff; | |
3246 | u64 *banks = vcpu->arch.mce_banks; | |
3247 | ||
3248 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
3249 | return -EINVAL; | |
3250 | /* | |
3251 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
3252 | * reporting is disabled | |
3253 | */ | |
3254 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
3255 | vcpu->arch.mcg_ctl != ~(u64)0) | |
3256 | return 0; | |
3257 | banks += 4 * mce->bank; | |
3258 | /* | |
3259 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
3260 | * reporting is disabled for the bank | |
3261 | */ | |
3262 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
3263 | return 0; | |
3264 | if (mce->status & MCI_STATUS_UC) { | |
3265 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 3266 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
a8eeb04a | 3267 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
890ca9ae HY |
3268 | return 0; |
3269 | } | |
3270 | if (banks[1] & MCI_STATUS_VAL) | |
3271 | mce->status |= MCI_STATUS_OVER; | |
3272 | banks[2] = mce->addr; | |
3273 | banks[3] = mce->misc; | |
3274 | vcpu->arch.mcg_status = mce->mcg_status; | |
3275 | banks[1] = mce->status; | |
3276 | kvm_queue_exception(vcpu, MC_VECTOR); | |
3277 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
3278 | || !(banks[1] & MCI_STATUS_UC)) { | |
3279 | if (banks[1] & MCI_STATUS_VAL) | |
3280 | mce->status |= MCI_STATUS_OVER; | |
3281 | banks[2] = mce->addr; | |
3282 | banks[3] = mce->misc; | |
3283 | banks[1] = mce->status; | |
3284 | } else | |
3285 | banks[1] |= MCI_STATUS_OVER; | |
3286 | return 0; | |
3287 | } | |
3288 | ||
3cfc3092 JK |
3289 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
3290 | struct kvm_vcpu_events *events) | |
3291 | { | |
7460fb4a | 3292 | process_nmi(vcpu); |
664f8e26 WL |
3293 | /* |
3294 | * FIXME: pass injected and pending separately. This is only | |
3295 | * needed for nested virtualization, whose state cannot be | |
3296 | * migrated yet. For now we can combine them. | |
3297 | */ | |
03b82a30 | 3298 | events->exception.injected = |
664f8e26 WL |
3299 | (vcpu->arch.exception.pending || |
3300 | vcpu->arch.exception.injected) && | |
03b82a30 | 3301 | !kvm_exception_is_soft(vcpu->arch.exception.nr); |
3cfc3092 JK |
3302 | events->exception.nr = vcpu->arch.exception.nr; |
3303 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
97e69aa6 | 3304 | events->exception.pad = 0; |
3cfc3092 JK |
3305 | events->exception.error_code = vcpu->arch.exception.error_code; |
3306 | ||
03b82a30 JK |
3307 | events->interrupt.injected = |
3308 | vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft; | |
3cfc3092 | 3309 | events->interrupt.nr = vcpu->arch.interrupt.nr; |
03b82a30 | 3310 | events->interrupt.soft = 0; |
37ccdcbe | 3311 | events->interrupt.shadow = kvm_x86_ops->get_interrupt_shadow(vcpu); |
3cfc3092 JK |
3312 | |
3313 | events->nmi.injected = vcpu->arch.nmi_injected; | |
7460fb4a | 3314 | events->nmi.pending = vcpu->arch.nmi_pending != 0; |
3cfc3092 | 3315 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); |
97e69aa6 | 3316 | events->nmi.pad = 0; |
3cfc3092 | 3317 | |
66450a21 | 3318 | events->sipi_vector = 0; /* never valid when reporting to user space */ |
3cfc3092 | 3319 | |
f077825a PB |
3320 | events->smi.smm = is_smm(vcpu); |
3321 | events->smi.pending = vcpu->arch.smi_pending; | |
3322 | events->smi.smm_inside_nmi = | |
3323 | !!(vcpu->arch.hflags & HF_SMM_INSIDE_NMI_MASK); | |
3324 | events->smi.latched_init = kvm_lapic_latched_init(vcpu); | |
3325 | ||
dab4b911 | 3326 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
f077825a PB |
3327 | | KVM_VCPUEVENT_VALID_SHADOW |
3328 | | KVM_VCPUEVENT_VALID_SMM); | |
97e69aa6 | 3329 | memset(&events->reserved, 0, sizeof(events->reserved)); |
3cfc3092 JK |
3330 | } |
3331 | ||
6ef4e07e XG |
3332 | static void kvm_set_hflags(struct kvm_vcpu *vcpu, unsigned emul_flags); |
3333 | ||
3cfc3092 JK |
3334 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, |
3335 | struct kvm_vcpu_events *events) | |
3336 | { | |
dab4b911 | 3337 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 | 3338 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
f077825a PB |
3339 | | KVM_VCPUEVENT_VALID_SHADOW |
3340 | | KVM_VCPUEVENT_VALID_SMM)) | |
3cfc3092 JK |
3341 | return -EINVAL; |
3342 | ||
78e546c8 | 3343 | if (events->exception.injected && |
28d06353 JM |
3344 | (events->exception.nr > 31 || events->exception.nr == NMI_VECTOR || |
3345 | is_guest_mode(vcpu))) | |
78e546c8 PB |
3346 | return -EINVAL; |
3347 | ||
28bf2888 DH |
3348 | /* INITs are latched while in SMM */ |
3349 | if (events->flags & KVM_VCPUEVENT_VALID_SMM && | |
3350 | (events->smi.smm || events->smi.pending) && | |
3351 | vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) | |
3352 | return -EINVAL; | |
3353 | ||
7460fb4a | 3354 | process_nmi(vcpu); |
664f8e26 | 3355 | vcpu->arch.exception.injected = false; |
3cfc3092 JK |
3356 | vcpu->arch.exception.pending = events->exception.injected; |
3357 | vcpu->arch.exception.nr = events->exception.nr; | |
3358 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
3359 | vcpu->arch.exception.error_code = events->exception.error_code; | |
3360 | ||
3361 | vcpu->arch.interrupt.pending = events->interrupt.injected; | |
3362 | vcpu->arch.interrupt.nr = events->interrupt.nr; | |
3363 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
48005f64 JK |
3364 | if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) |
3365 | kvm_x86_ops->set_interrupt_shadow(vcpu, | |
3366 | events->interrupt.shadow); | |
3cfc3092 JK |
3367 | |
3368 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
3369 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
3370 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
3371 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
3372 | ||
66450a21 | 3373 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR && |
bce87cce | 3374 | lapic_in_kernel(vcpu)) |
66450a21 | 3375 | vcpu->arch.apic->sipi_vector = events->sipi_vector; |
3cfc3092 | 3376 | |
f077825a | 3377 | if (events->flags & KVM_VCPUEVENT_VALID_SMM) { |
6ef4e07e | 3378 | u32 hflags = vcpu->arch.hflags; |
f077825a | 3379 | if (events->smi.smm) |
6ef4e07e | 3380 | hflags |= HF_SMM_MASK; |
f077825a | 3381 | else |
6ef4e07e XG |
3382 | hflags &= ~HF_SMM_MASK; |
3383 | kvm_set_hflags(vcpu, hflags); | |
3384 | ||
f077825a | 3385 | vcpu->arch.smi_pending = events->smi.pending; |
f4ef1910 WL |
3386 | |
3387 | if (events->smi.smm) { | |
3388 | if (events->smi.smm_inside_nmi) | |
3389 | vcpu->arch.hflags |= HF_SMM_INSIDE_NMI_MASK; | |
f077825a | 3390 | else |
f4ef1910 WL |
3391 | vcpu->arch.hflags &= ~HF_SMM_INSIDE_NMI_MASK; |
3392 | if (lapic_in_kernel(vcpu)) { | |
3393 | if (events->smi.latched_init) | |
3394 | set_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); | |
3395 | else | |
3396 | clear_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); | |
3397 | } | |
f077825a PB |
3398 | } |
3399 | } | |
3400 | ||
3842d135 AK |
3401 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
3402 | ||
3cfc3092 JK |
3403 | return 0; |
3404 | } | |
3405 | ||
a1efbe77 JK |
3406 | static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, |
3407 | struct kvm_debugregs *dbgregs) | |
3408 | { | |
73aaf249 JK |
3409 | unsigned long val; |
3410 | ||
a1efbe77 | 3411 | memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db)); |
16f8a6f9 | 3412 | kvm_get_dr(vcpu, 6, &val); |
73aaf249 | 3413 | dbgregs->dr6 = val; |
a1efbe77 JK |
3414 | dbgregs->dr7 = vcpu->arch.dr7; |
3415 | dbgregs->flags = 0; | |
97e69aa6 | 3416 | memset(&dbgregs->reserved, 0, sizeof(dbgregs->reserved)); |
a1efbe77 JK |
3417 | } |
3418 | ||
3419 | static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, | |
3420 | struct kvm_debugregs *dbgregs) | |
3421 | { | |
3422 | if (dbgregs->flags) | |
3423 | return -EINVAL; | |
3424 | ||
d14bdb55 PB |
3425 | if (dbgregs->dr6 & ~0xffffffffull) |
3426 | return -EINVAL; | |
3427 | if (dbgregs->dr7 & ~0xffffffffull) | |
3428 | return -EINVAL; | |
3429 | ||
a1efbe77 | 3430 | memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db)); |
ae561ede | 3431 | kvm_update_dr0123(vcpu); |
a1efbe77 | 3432 | vcpu->arch.dr6 = dbgregs->dr6; |
73aaf249 | 3433 | kvm_update_dr6(vcpu); |
a1efbe77 | 3434 | vcpu->arch.dr7 = dbgregs->dr7; |
9926c9fd | 3435 | kvm_update_dr7(vcpu); |
a1efbe77 | 3436 | |
a1efbe77 JK |
3437 | return 0; |
3438 | } | |
3439 | ||
df1daba7 PB |
3440 | #define XSTATE_COMPACTION_ENABLED (1ULL << 63) |
3441 | ||
3442 | static void fill_xsave(u8 *dest, struct kvm_vcpu *vcpu) | |
3443 | { | |
c47ada30 | 3444 | struct xregs_state *xsave = &vcpu->arch.guest_fpu.state.xsave; |
400e4b20 | 3445 | u64 xstate_bv = xsave->header.xfeatures; |
df1daba7 PB |
3446 | u64 valid; |
3447 | ||
3448 | /* | |
3449 | * Copy legacy XSAVE area, to avoid complications with CPUID | |
3450 | * leaves 0 and 1 in the loop below. | |
3451 | */ | |
3452 | memcpy(dest, xsave, XSAVE_HDR_OFFSET); | |
3453 | ||
3454 | /* Set XSTATE_BV */ | |
00c87e9a | 3455 | xstate_bv &= vcpu->arch.guest_supported_xcr0 | XFEATURE_MASK_FPSSE; |
df1daba7 PB |
3456 | *(u64 *)(dest + XSAVE_HDR_OFFSET) = xstate_bv; |
3457 | ||
3458 | /* | |
3459 | * Copy each region from the possibly compacted offset to the | |
3460 | * non-compacted offset. | |
3461 | */ | |
d91cab78 | 3462 | valid = xstate_bv & ~XFEATURE_MASK_FPSSE; |
df1daba7 PB |
3463 | while (valid) { |
3464 | u64 feature = valid & -valid; | |
3465 | int index = fls64(feature) - 1; | |
3466 | void *src = get_xsave_addr(xsave, feature); | |
3467 | ||
3468 | if (src) { | |
3469 | u32 size, offset, ecx, edx; | |
3470 | cpuid_count(XSTATE_CPUID, index, | |
3471 | &size, &offset, &ecx, &edx); | |
38cfd5e3 PB |
3472 | if (feature == XFEATURE_MASK_PKRU) |
3473 | memcpy(dest + offset, &vcpu->arch.pkru, | |
3474 | sizeof(vcpu->arch.pkru)); | |
3475 | else | |
3476 | memcpy(dest + offset, src, size); | |
3477 | ||
df1daba7 PB |
3478 | } |
3479 | ||
3480 | valid -= feature; | |
3481 | } | |
3482 | } | |
3483 | ||
3484 | static void load_xsave(struct kvm_vcpu *vcpu, u8 *src) | |
3485 | { | |
c47ada30 | 3486 | struct xregs_state *xsave = &vcpu->arch.guest_fpu.state.xsave; |
df1daba7 PB |
3487 | u64 xstate_bv = *(u64 *)(src + XSAVE_HDR_OFFSET); |
3488 | u64 valid; | |
3489 | ||
3490 | /* | |
3491 | * Copy legacy XSAVE area, to avoid complications with CPUID | |
3492 | * leaves 0 and 1 in the loop below. | |
3493 | */ | |
3494 | memcpy(xsave, src, XSAVE_HDR_OFFSET); | |
3495 | ||
3496 | /* Set XSTATE_BV and possibly XCOMP_BV. */ | |
400e4b20 | 3497 | xsave->header.xfeatures = xstate_bv; |
782511b0 | 3498 | if (boot_cpu_has(X86_FEATURE_XSAVES)) |
3a54450b | 3499 | xsave->header.xcomp_bv = host_xcr0 | XSTATE_COMPACTION_ENABLED; |
df1daba7 PB |
3500 | |
3501 | /* | |
3502 | * Copy each region from the non-compacted offset to the | |
3503 | * possibly compacted offset. | |
3504 | */ | |
d91cab78 | 3505 | valid = xstate_bv & ~XFEATURE_MASK_FPSSE; |
df1daba7 PB |
3506 | while (valid) { |
3507 | u64 feature = valid & -valid; | |
3508 | int index = fls64(feature) - 1; | |
3509 | void *dest = get_xsave_addr(xsave, feature); | |
3510 | ||
3511 | if (dest) { | |
3512 | u32 size, offset, ecx, edx; | |
3513 | cpuid_count(XSTATE_CPUID, index, | |
3514 | &size, &offset, &ecx, &edx); | |
38cfd5e3 PB |
3515 | if (feature == XFEATURE_MASK_PKRU) |
3516 | memcpy(&vcpu->arch.pkru, src + offset, | |
3517 | sizeof(vcpu->arch.pkru)); | |
3518 | else | |
3519 | memcpy(dest, src + offset, size); | |
ee4100da | 3520 | } |
df1daba7 PB |
3521 | |
3522 | valid -= feature; | |
3523 | } | |
3524 | } | |
3525 | ||
2d5b5a66 SY |
3526 | static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu, |
3527 | struct kvm_xsave *guest_xsave) | |
3528 | { | |
d366bf7e | 3529 | if (boot_cpu_has(X86_FEATURE_XSAVE)) { |
df1daba7 PB |
3530 | memset(guest_xsave, 0, sizeof(struct kvm_xsave)); |
3531 | fill_xsave((u8 *) guest_xsave->region, vcpu); | |
4344ee98 | 3532 | } else { |
2d5b5a66 | 3533 | memcpy(guest_xsave->region, |
7366ed77 | 3534 | &vcpu->arch.guest_fpu.state.fxsave, |
c47ada30 | 3535 | sizeof(struct fxregs_state)); |
2d5b5a66 | 3536 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] = |
d91cab78 | 3537 | XFEATURE_MASK_FPSSE; |
2d5b5a66 SY |
3538 | } |
3539 | } | |
3540 | ||
a575813b WL |
3541 | #define XSAVE_MXCSR_OFFSET 24 |
3542 | ||
2d5b5a66 SY |
3543 | static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu, |
3544 | struct kvm_xsave *guest_xsave) | |
3545 | { | |
3546 | u64 xstate_bv = | |
3547 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)]; | |
a575813b | 3548 | u32 mxcsr = *(u32 *)&guest_xsave->region[XSAVE_MXCSR_OFFSET / sizeof(u32)]; |
2d5b5a66 | 3549 | |
d366bf7e | 3550 | if (boot_cpu_has(X86_FEATURE_XSAVE)) { |
d7876f1b PB |
3551 | /* |
3552 | * Here we allow setting states that are not present in | |
3553 | * CPUID leaf 0xD, index 0, EDX:EAX. This is for compatibility | |
3554 | * with old userspace. | |
3555 | */ | |
a575813b WL |
3556 | if (xstate_bv & ~kvm_supported_xcr0() || |
3557 | mxcsr & ~mxcsr_feature_mask) | |
d7876f1b | 3558 | return -EINVAL; |
df1daba7 | 3559 | load_xsave(vcpu, (u8 *)guest_xsave->region); |
d7876f1b | 3560 | } else { |
a575813b WL |
3561 | if (xstate_bv & ~XFEATURE_MASK_FPSSE || |
3562 | mxcsr & ~mxcsr_feature_mask) | |
2d5b5a66 | 3563 | return -EINVAL; |
7366ed77 | 3564 | memcpy(&vcpu->arch.guest_fpu.state.fxsave, |
c47ada30 | 3565 | guest_xsave->region, sizeof(struct fxregs_state)); |
2d5b5a66 SY |
3566 | } |
3567 | return 0; | |
3568 | } | |
3569 | ||
3570 | static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu, | |
3571 | struct kvm_xcrs *guest_xcrs) | |
3572 | { | |
d366bf7e | 3573 | if (!boot_cpu_has(X86_FEATURE_XSAVE)) { |
2d5b5a66 SY |
3574 | guest_xcrs->nr_xcrs = 0; |
3575 | return; | |
3576 | } | |
3577 | ||
3578 | guest_xcrs->nr_xcrs = 1; | |
3579 | guest_xcrs->flags = 0; | |
3580 | guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK; | |
3581 | guest_xcrs->xcrs[0].value = vcpu->arch.xcr0; | |
3582 | } | |
3583 | ||
3584 | static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu, | |
3585 | struct kvm_xcrs *guest_xcrs) | |
3586 | { | |
3587 | int i, r = 0; | |
3588 | ||
d366bf7e | 3589 | if (!boot_cpu_has(X86_FEATURE_XSAVE)) |
2d5b5a66 SY |
3590 | return -EINVAL; |
3591 | ||
3592 | if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags) | |
3593 | return -EINVAL; | |
3594 | ||
3595 | for (i = 0; i < guest_xcrs->nr_xcrs; i++) | |
3596 | /* Only support XCR0 currently */ | |
c67a04cb | 3597 | if (guest_xcrs->xcrs[i].xcr == XCR_XFEATURE_ENABLED_MASK) { |
2d5b5a66 | 3598 | r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK, |
c67a04cb | 3599 | guest_xcrs->xcrs[i].value); |
2d5b5a66 SY |
3600 | break; |
3601 | } | |
3602 | if (r) | |
3603 | r = -EINVAL; | |
3604 | return r; | |
3605 | } | |
3606 | ||
1c0b28c2 EM |
3607 | /* |
3608 | * kvm_set_guest_paused() indicates to the guest kernel that it has been | |
3609 | * stopped by the hypervisor. This function will be called from the host only. | |
3610 | * EINVAL is returned when the host attempts to set the flag for a guest that | |
3611 | * does not support pv clocks. | |
3612 | */ | |
3613 | static int kvm_set_guest_paused(struct kvm_vcpu *vcpu) | |
3614 | { | |
0b79459b | 3615 | if (!vcpu->arch.pv_time_enabled) |
1c0b28c2 | 3616 | return -EINVAL; |
51d59c6b | 3617 | vcpu->arch.pvclock_set_guest_stopped_request = true; |
1c0b28c2 EM |
3618 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
3619 | return 0; | |
3620 | } | |
3621 | ||
5c919412 AS |
3622 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
3623 | struct kvm_enable_cap *cap) | |
3624 | { | |
3625 | if (cap->flags) | |
3626 | return -EINVAL; | |
3627 | ||
3628 | switch (cap->cap) { | |
efc479e6 RK |
3629 | case KVM_CAP_HYPERV_SYNIC2: |
3630 | if (cap->args[0]) | |
3631 | return -EINVAL; | |
5c919412 | 3632 | case KVM_CAP_HYPERV_SYNIC: |
546d87e5 WL |
3633 | if (!irqchip_in_kernel(vcpu->kvm)) |
3634 | return -EINVAL; | |
efc479e6 RK |
3635 | return kvm_hv_activate_synic(vcpu, cap->cap == |
3636 | KVM_CAP_HYPERV_SYNIC2); | |
5c919412 AS |
3637 | default: |
3638 | return -EINVAL; | |
3639 | } | |
3640 | } | |
3641 | ||
313a3dc7 CO |
3642 | long kvm_arch_vcpu_ioctl(struct file *filp, |
3643 | unsigned int ioctl, unsigned long arg) | |
3644 | { | |
3645 | struct kvm_vcpu *vcpu = filp->private_data; | |
3646 | void __user *argp = (void __user *)arg; | |
3647 | int r; | |
d1ac91d8 AK |
3648 | union { |
3649 | struct kvm_lapic_state *lapic; | |
3650 | struct kvm_xsave *xsave; | |
3651 | struct kvm_xcrs *xcrs; | |
3652 | void *buffer; | |
3653 | } u; | |
3654 | ||
9b062471 CD |
3655 | vcpu_load(vcpu); |
3656 | ||
d1ac91d8 | 3657 | u.buffer = NULL; |
313a3dc7 CO |
3658 | switch (ioctl) { |
3659 | case KVM_GET_LAPIC: { | |
2204ae3c | 3660 | r = -EINVAL; |
bce87cce | 3661 | if (!lapic_in_kernel(vcpu)) |
2204ae3c | 3662 | goto out; |
d1ac91d8 | 3663 | u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 3664 | |
b772ff36 | 3665 | r = -ENOMEM; |
d1ac91d8 | 3666 | if (!u.lapic) |
b772ff36 | 3667 | goto out; |
d1ac91d8 | 3668 | r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3669 | if (r) |
3670 | goto out; | |
3671 | r = -EFAULT; | |
d1ac91d8 | 3672 | if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
3673 | goto out; |
3674 | r = 0; | |
3675 | break; | |
3676 | } | |
3677 | case KVM_SET_LAPIC: { | |
2204ae3c | 3678 | r = -EINVAL; |
bce87cce | 3679 | if (!lapic_in_kernel(vcpu)) |
2204ae3c | 3680 | goto out; |
ff5c2c03 | 3681 | u.lapic = memdup_user(argp, sizeof(*u.lapic)); |
9b062471 CD |
3682 | if (IS_ERR(u.lapic)) { |
3683 | r = PTR_ERR(u.lapic); | |
3684 | goto out_nofree; | |
3685 | } | |
ff5c2c03 | 3686 | |
d1ac91d8 | 3687 | r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3688 | break; |
3689 | } | |
f77bc6a4 ZX |
3690 | case KVM_INTERRUPT: { |
3691 | struct kvm_interrupt irq; | |
3692 | ||
3693 | r = -EFAULT; | |
3694 | if (copy_from_user(&irq, argp, sizeof irq)) | |
3695 | goto out; | |
3696 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
f77bc6a4 ZX |
3697 | break; |
3698 | } | |
c4abb7c9 JK |
3699 | case KVM_NMI: { |
3700 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
c4abb7c9 JK |
3701 | break; |
3702 | } | |
f077825a PB |
3703 | case KVM_SMI: { |
3704 | r = kvm_vcpu_ioctl_smi(vcpu); | |
3705 | break; | |
3706 | } | |
313a3dc7 CO |
3707 | case KVM_SET_CPUID: { |
3708 | struct kvm_cpuid __user *cpuid_arg = argp; | |
3709 | struct kvm_cpuid cpuid; | |
3710 | ||
3711 | r = -EFAULT; | |
3712 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3713 | goto out; | |
3714 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
313a3dc7 CO |
3715 | break; |
3716 | } | |
07716717 DK |
3717 | case KVM_SET_CPUID2: { |
3718 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3719 | struct kvm_cpuid2 cpuid; | |
3720 | ||
3721 | r = -EFAULT; | |
3722 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3723 | goto out; | |
3724 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 3725 | cpuid_arg->entries); |
07716717 DK |
3726 | break; |
3727 | } | |
3728 | case KVM_GET_CPUID2: { | |
3729 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3730 | struct kvm_cpuid2 cpuid; | |
3731 | ||
3732 | r = -EFAULT; | |
3733 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3734 | goto out; | |
3735 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 3736 | cpuid_arg->entries); |
07716717 DK |
3737 | if (r) |
3738 | goto out; | |
3739 | r = -EFAULT; | |
3740 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
3741 | goto out; | |
3742 | r = 0; | |
3743 | break; | |
3744 | } | |
801e459a TL |
3745 | case KVM_GET_MSRS: { |
3746 | int idx = srcu_read_lock(&vcpu->kvm->srcu); | |
609e36d3 | 3747 | r = msr_io(vcpu, argp, do_get_msr, 1); |
801e459a | 3748 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 3749 | break; |
801e459a TL |
3750 | } |
3751 | case KVM_SET_MSRS: { | |
3752 | int idx = srcu_read_lock(&vcpu->kvm->srcu); | |
313a3dc7 | 3753 | r = msr_io(vcpu, argp, do_set_msr, 0); |
801e459a | 3754 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 3755 | break; |
801e459a | 3756 | } |
b209749f AK |
3757 | case KVM_TPR_ACCESS_REPORTING: { |
3758 | struct kvm_tpr_access_ctl tac; | |
3759 | ||
3760 | r = -EFAULT; | |
3761 | if (copy_from_user(&tac, argp, sizeof tac)) | |
3762 | goto out; | |
3763 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
3764 | if (r) | |
3765 | goto out; | |
3766 | r = -EFAULT; | |
3767 | if (copy_to_user(argp, &tac, sizeof tac)) | |
3768 | goto out; | |
3769 | r = 0; | |
3770 | break; | |
3771 | }; | |
b93463aa AK |
3772 | case KVM_SET_VAPIC_ADDR: { |
3773 | struct kvm_vapic_addr va; | |
7301d6ab | 3774 | int idx; |
b93463aa AK |
3775 | |
3776 | r = -EINVAL; | |
35754c98 | 3777 | if (!lapic_in_kernel(vcpu)) |
b93463aa AK |
3778 | goto out; |
3779 | r = -EFAULT; | |
3780 | if (copy_from_user(&va, argp, sizeof va)) | |
3781 | goto out; | |
7301d6ab | 3782 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
fda4e2e8 | 3783 | r = kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); |
7301d6ab | 3784 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b93463aa AK |
3785 | break; |
3786 | } | |
890ca9ae HY |
3787 | case KVM_X86_SETUP_MCE: { |
3788 | u64 mcg_cap; | |
3789 | ||
3790 | r = -EFAULT; | |
3791 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
3792 | goto out; | |
3793 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
3794 | break; | |
3795 | } | |
3796 | case KVM_X86_SET_MCE: { | |
3797 | struct kvm_x86_mce mce; | |
3798 | ||
3799 | r = -EFAULT; | |
3800 | if (copy_from_user(&mce, argp, sizeof mce)) | |
3801 | goto out; | |
3802 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
3803 | break; | |
3804 | } | |
3cfc3092 JK |
3805 | case KVM_GET_VCPU_EVENTS: { |
3806 | struct kvm_vcpu_events events; | |
3807 | ||
3808 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
3809 | ||
3810 | r = -EFAULT; | |
3811 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
3812 | break; | |
3813 | r = 0; | |
3814 | break; | |
3815 | } | |
3816 | case KVM_SET_VCPU_EVENTS: { | |
3817 | struct kvm_vcpu_events events; | |
3818 | ||
3819 | r = -EFAULT; | |
3820 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
3821 | break; | |
3822 | ||
3823 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
3824 | break; | |
3825 | } | |
a1efbe77 JK |
3826 | case KVM_GET_DEBUGREGS: { |
3827 | struct kvm_debugregs dbgregs; | |
3828 | ||
3829 | kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs); | |
3830 | ||
3831 | r = -EFAULT; | |
3832 | if (copy_to_user(argp, &dbgregs, | |
3833 | sizeof(struct kvm_debugregs))) | |
3834 | break; | |
3835 | r = 0; | |
3836 | break; | |
3837 | } | |
3838 | case KVM_SET_DEBUGREGS: { | |
3839 | struct kvm_debugregs dbgregs; | |
3840 | ||
3841 | r = -EFAULT; | |
3842 | if (copy_from_user(&dbgregs, argp, | |
3843 | sizeof(struct kvm_debugregs))) | |
3844 | break; | |
3845 | ||
3846 | r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs); | |
3847 | break; | |
3848 | } | |
2d5b5a66 | 3849 | case KVM_GET_XSAVE: { |
d1ac91d8 | 3850 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 3851 | r = -ENOMEM; |
d1ac91d8 | 3852 | if (!u.xsave) |
2d5b5a66 SY |
3853 | break; |
3854 | ||
d1ac91d8 | 3855 | kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3856 | |
3857 | r = -EFAULT; | |
d1ac91d8 | 3858 | if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
3859 | break; |
3860 | r = 0; | |
3861 | break; | |
3862 | } | |
3863 | case KVM_SET_XSAVE: { | |
ff5c2c03 | 3864 | u.xsave = memdup_user(argp, sizeof(*u.xsave)); |
9b062471 CD |
3865 | if (IS_ERR(u.xsave)) { |
3866 | r = PTR_ERR(u.xsave); | |
3867 | goto out_nofree; | |
3868 | } | |
2d5b5a66 | 3869 | |
d1ac91d8 | 3870 | r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3871 | break; |
3872 | } | |
3873 | case KVM_GET_XCRS: { | |
d1ac91d8 | 3874 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 3875 | r = -ENOMEM; |
d1ac91d8 | 3876 | if (!u.xcrs) |
2d5b5a66 SY |
3877 | break; |
3878 | ||
d1ac91d8 | 3879 | kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3880 | |
3881 | r = -EFAULT; | |
d1ac91d8 | 3882 | if (copy_to_user(argp, u.xcrs, |
2d5b5a66 SY |
3883 | sizeof(struct kvm_xcrs))) |
3884 | break; | |
3885 | r = 0; | |
3886 | break; | |
3887 | } | |
3888 | case KVM_SET_XCRS: { | |
ff5c2c03 | 3889 | u.xcrs = memdup_user(argp, sizeof(*u.xcrs)); |
9b062471 CD |
3890 | if (IS_ERR(u.xcrs)) { |
3891 | r = PTR_ERR(u.xcrs); | |
3892 | goto out_nofree; | |
3893 | } | |
2d5b5a66 | 3894 | |
d1ac91d8 | 3895 | r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3896 | break; |
3897 | } | |
92a1f12d JR |
3898 | case KVM_SET_TSC_KHZ: { |
3899 | u32 user_tsc_khz; | |
3900 | ||
3901 | r = -EINVAL; | |
92a1f12d JR |
3902 | user_tsc_khz = (u32)arg; |
3903 | ||
3904 | if (user_tsc_khz >= kvm_max_guest_tsc_khz) | |
3905 | goto out; | |
3906 | ||
cc578287 ZA |
3907 | if (user_tsc_khz == 0) |
3908 | user_tsc_khz = tsc_khz; | |
3909 | ||
381d585c HZ |
3910 | if (!kvm_set_tsc_khz(vcpu, user_tsc_khz)) |
3911 | r = 0; | |
92a1f12d | 3912 | |
92a1f12d JR |
3913 | goto out; |
3914 | } | |
3915 | case KVM_GET_TSC_KHZ: { | |
cc578287 | 3916 | r = vcpu->arch.virtual_tsc_khz; |
92a1f12d JR |
3917 | goto out; |
3918 | } | |
1c0b28c2 EM |
3919 | case KVM_KVMCLOCK_CTRL: { |
3920 | r = kvm_set_guest_paused(vcpu); | |
3921 | goto out; | |
3922 | } | |
5c919412 AS |
3923 | case KVM_ENABLE_CAP: { |
3924 | struct kvm_enable_cap cap; | |
3925 | ||
3926 | r = -EFAULT; | |
3927 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
3928 | goto out; | |
3929 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
3930 | break; | |
3931 | } | |
313a3dc7 CO |
3932 | default: |
3933 | r = -EINVAL; | |
3934 | } | |
3935 | out: | |
d1ac91d8 | 3936 | kfree(u.buffer); |
9b062471 CD |
3937 | out_nofree: |
3938 | vcpu_put(vcpu); | |
313a3dc7 CO |
3939 | return r; |
3940 | } | |
3941 | ||
5b1c1493 CO |
3942 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
3943 | { | |
3944 | return VM_FAULT_SIGBUS; | |
3945 | } | |
3946 | ||
1fe779f8 CO |
3947 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
3948 | { | |
3949 | int ret; | |
3950 | ||
3951 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
951179ce | 3952 | return -EINVAL; |
1fe779f8 CO |
3953 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); |
3954 | return ret; | |
3955 | } | |
3956 | ||
b927a3ce SY |
3957 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
3958 | u64 ident_addr) | |
3959 | { | |
3960 | kvm->arch.ept_identity_map_addr = ident_addr; | |
3961 | return 0; | |
3962 | } | |
3963 | ||
1fe779f8 CO |
3964 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
3965 | u32 kvm_nr_mmu_pages) | |
3966 | { | |
3967 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
3968 | return -EINVAL; | |
3969 | ||
79fac95e | 3970 | mutex_lock(&kvm->slots_lock); |
1fe779f8 CO |
3971 | |
3972 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 3973 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 3974 | |
79fac95e | 3975 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
3976 | return 0; |
3977 | } | |
3978 | ||
3979 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
3980 | { | |
39de71ec | 3981 | return kvm->arch.n_max_mmu_pages; |
1fe779f8 CO |
3982 | } |
3983 | ||
1fe779f8 CO |
3984 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
3985 | { | |
90bca052 | 3986 | struct kvm_pic *pic = kvm->arch.vpic; |
1fe779f8 CO |
3987 | int r; |
3988 | ||
3989 | r = 0; | |
3990 | switch (chip->chip_id) { | |
3991 | case KVM_IRQCHIP_PIC_MASTER: | |
90bca052 | 3992 | memcpy(&chip->chip.pic, &pic->pics[0], |
1fe779f8 CO |
3993 | sizeof(struct kvm_pic_state)); |
3994 | break; | |
3995 | case KVM_IRQCHIP_PIC_SLAVE: | |
90bca052 | 3996 | memcpy(&chip->chip.pic, &pic->pics[1], |
1fe779f8 CO |
3997 | sizeof(struct kvm_pic_state)); |
3998 | break; | |
3999 | case KVM_IRQCHIP_IOAPIC: | |
33392b49 | 4000 | kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
4001 | break; |
4002 | default: | |
4003 | r = -EINVAL; | |
4004 | break; | |
4005 | } | |
4006 | return r; | |
4007 | } | |
4008 | ||
4009 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
4010 | { | |
90bca052 | 4011 | struct kvm_pic *pic = kvm->arch.vpic; |
1fe779f8 CO |
4012 | int r; |
4013 | ||
4014 | r = 0; | |
4015 | switch (chip->chip_id) { | |
4016 | case KVM_IRQCHIP_PIC_MASTER: | |
90bca052 DH |
4017 | spin_lock(&pic->lock); |
4018 | memcpy(&pic->pics[0], &chip->chip.pic, | |
1fe779f8 | 4019 | sizeof(struct kvm_pic_state)); |
90bca052 | 4020 | spin_unlock(&pic->lock); |
1fe779f8 CO |
4021 | break; |
4022 | case KVM_IRQCHIP_PIC_SLAVE: | |
90bca052 DH |
4023 | spin_lock(&pic->lock); |
4024 | memcpy(&pic->pics[1], &chip->chip.pic, | |
1fe779f8 | 4025 | sizeof(struct kvm_pic_state)); |
90bca052 | 4026 | spin_unlock(&pic->lock); |
1fe779f8 CO |
4027 | break; |
4028 | case KVM_IRQCHIP_IOAPIC: | |
33392b49 | 4029 | kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
4030 | break; |
4031 | default: | |
4032 | r = -EINVAL; | |
4033 | break; | |
4034 | } | |
90bca052 | 4035 | kvm_pic_update_irq(pic); |
1fe779f8 CO |
4036 | return r; |
4037 | } | |
4038 | ||
e0f63cb9 SY |
4039 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
4040 | { | |
34f3941c RK |
4041 | struct kvm_kpit_state *kps = &kvm->arch.vpit->pit_state; |
4042 | ||
4043 | BUILD_BUG_ON(sizeof(*ps) != sizeof(kps->channels)); | |
4044 | ||
4045 | mutex_lock(&kps->lock); | |
4046 | memcpy(ps, &kps->channels, sizeof(*ps)); | |
4047 | mutex_unlock(&kps->lock); | |
2da29bcc | 4048 | return 0; |
e0f63cb9 SY |
4049 | } |
4050 | ||
4051 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
4052 | { | |
0185604c | 4053 | int i; |
09edea72 RK |
4054 | struct kvm_pit *pit = kvm->arch.vpit; |
4055 | ||
4056 | mutex_lock(&pit->pit_state.lock); | |
34f3941c | 4057 | memcpy(&pit->pit_state.channels, ps, sizeof(*ps)); |
0185604c | 4058 | for (i = 0; i < 3; i++) |
09edea72 RK |
4059 | kvm_pit_load_count(pit, i, ps->channels[i].count, 0); |
4060 | mutex_unlock(&pit->pit_state.lock); | |
2da29bcc | 4061 | return 0; |
e9f42757 BK |
4062 | } |
4063 | ||
4064 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
4065 | { | |
e9f42757 BK |
4066 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
4067 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
4068 | sizeof(ps->channels)); | |
4069 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
4070 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
97e69aa6 | 4071 | memset(&ps->reserved, 0, sizeof(ps->reserved)); |
2da29bcc | 4072 | return 0; |
e9f42757 BK |
4073 | } |
4074 | ||
4075 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
4076 | { | |
2da29bcc | 4077 | int start = 0; |
0185604c | 4078 | int i; |
e9f42757 | 4079 | u32 prev_legacy, cur_legacy; |
09edea72 RK |
4080 | struct kvm_pit *pit = kvm->arch.vpit; |
4081 | ||
4082 | mutex_lock(&pit->pit_state.lock); | |
4083 | prev_legacy = pit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
e9f42757 BK |
4084 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; |
4085 | if (!prev_legacy && cur_legacy) | |
4086 | start = 1; | |
09edea72 RK |
4087 | memcpy(&pit->pit_state.channels, &ps->channels, |
4088 | sizeof(pit->pit_state.channels)); | |
4089 | pit->pit_state.flags = ps->flags; | |
0185604c | 4090 | for (i = 0; i < 3; i++) |
09edea72 | 4091 | kvm_pit_load_count(pit, i, pit->pit_state.channels[i].count, |
e5e57e7a | 4092 | start && i == 0); |
09edea72 | 4093 | mutex_unlock(&pit->pit_state.lock); |
2da29bcc | 4094 | return 0; |
e0f63cb9 SY |
4095 | } |
4096 | ||
52d939a0 MT |
4097 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
4098 | struct kvm_reinject_control *control) | |
4099 | { | |
71474e2f RK |
4100 | struct kvm_pit *pit = kvm->arch.vpit; |
4101 | ||
4102 | if (!pit) | |
52d939a0 | 4103 | return -ENXIO; |
b39c90b6 | 4104 | |
71474e2f RK |
4105 | /* pit->pit_state.lock was overloaded to prevent userspace from getting |
4106 | * an inconsistent state after running multiple KVM_REINJECT_CONTROL | |
4107 | * ioctls in parallel. Use a separate lock if that ioctl isn't rare. | |
4108 | */ | |
4109 | mutex_lock(&pit->pit_state.lock); | |
4110 | kvm_pit_set_reinject(pit, control->pit_reinject); | |
4111 | mutex_unlock(&pit->pit_state.lock); | |
b39c90b6 | 4112 | |
52d939a0 MT |
4113 | return 0; |
4114 | } | |
4115 | ||
95d4c16c | 4116 | /** |
60c34612 TY |
4117 | * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot |
4118 | * @kvm: kvm instance | |
4119 | * @log: slot id and address to which we copy the log | |
95d4c16c | 4120 | * |
e108ff2f PB |
4121 | * Steps 1-4 below provide general overview of dirty page logging. See |
4122 | * kvm_get_dirty_log_protect() function description for additional details. | |
4123 | * | |
4124 | * We call kvm_get_dirty_log_protect() to handle steps 1-3, upon return we | |
4125 | * always flush the TLB (step 4) even if previous step failed and the dirty | |
4126 | * bitmap may be corrupt. Regardless of previous outcome the KVM logging API | |
4127 | * does not preclude user space subsequent dirty log read. Flushing TLB ensures | |
4128 | * writes will be marked dirty for next log read. | |
95d4c16c | 4129 | * |
60c34612 TY |
4130 | * 1. Take a snapshot of the bit and clear it if needed. |
4131 | * 2. Write protect the corresponding page. | |
e108ff2f PB |
4132 | * 3. Copy the snapshot to the userspace. |
4133 | * 4. Flush TLB's if needed. | |
5bb064dc | 4134 | */ |
60c34612 | 4135 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
5bb064dc | 4136 | { |
60c34612 | 4137 | bool is_dirty = false; |
e108ff2f | 4138 | int r; |
5bb064dc | 4139 | |
79fac95e | 4140 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 4141 | |
88178fd4 KH |
4142 | /* |
4143 | * Flush potentially hardware-cached dirty pages to dirty_bitmap. | |
4144 | */ | |
4145 | if (kvm_x86_ops->flush_log_dirty) | |
4146 | kvm_x86_ops->flush_log_dirty(kvm); | |
4147 | ||
e108ff2f | 4148 | r = kvm_get_dirty_log_protect(kvm, log, &is_dirty); |
198c74f4 XG |
4149 | |
4150 | /* | |
4151 | * All the TLBs can be flushed out of mmu lock, see the comments in | |
4152 | * kvm_mmu_slot_remove_write_access(). | |
4153 | */ | |
e108ff2f | 4154 | lockdep_assert_held(&kvm->slots_lock); |
198c74f4 XG |
4155 | if (is_dirty) |
4156 | kvm_flush_remote_tlbs(kvm); | |
4157 | ||
79fac95e | 4158 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
4159 | return r; |
4160 | } | |
4161 | ||
aa2fbe6d YZ |
4162 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, |
4163 | bool line_status) | |
23d43cf9 CD |
4164 | { |
4165 | if (!irqchip_in_kernel(kvm)) | |
4166 | return -ENXIO; | |
4167 | ||
4168 | irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, | |
aa2fbe6d YZ |
4169 | irq_event->irq, irq_event->level, |
4170 | line_status); | |
23d43cf9 CD |
4171 | return 0; |
4172 | } | |
4173 | ||
90de4a18 NA |
4174 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, |
4175 | struct kvm_enable_cap *cap) | |
4176 | { | |
4177 | int r; | |
4178 | ||
4179 | if (cap->flags) | |
4180 | return -EINVAL; | |
4181 | ||
4182 | switch (cap->cap) { | |
4183 | case KVM_CAP_DISABLE_QUIRKS: | |
4184 | kvm->arch.disabled_quirks = cap->args[0]; | |
4185 | r = 0; | |
4186 | break; | |
49df6397 SR |
4187 | case KVM_CAP_SPLIT_IRQCHIP: { |
4188 | mutex_lock(&kvm->lock); | |
b053b2ae SR |
4189 | r = -EINVAL; |
4190 | if (cap->args[0] > MAX_NR_RESERVED_IOAPIC_PINS) | |
4191 | goto split_irqchip_unlock; | |
49df6397 SR |
4192 | r = -EEXIST; |
4193 | if (irqchip_in_kernel(kvm)) | |
4194 | goto split_irqchip_unlock; | |
557abc40 | 4195 | if (kvm->created_vcpus) |
49df6397 SR |
4196 | goto split_irqchip_unlock; |
4197 | r = kvm_setup_empty_irq_routing(kvm); | |
5c0aea0e | 4198 | if (r) |
49df6397 SR |
4199 | goto split_irqchip_unlock; |
4200 | /* Pairs with irqchip_in_kernel. */ | |
4201 | smp_wmb(); | |
49776faf | 4202 | kvm->arch.irqchip_mode = KVM_IRQCHIP_SPLIT; |
b053b2ae | 4203 | kvm->arch.nr_reserved_ioapic_pins = cap->args[0]; |
49df6397 SR |
4204 | r = 0; |
4205 | split_irqchip_unlock: | |
4206 | mutex_unlock(&kvm->lock); | |
4207 | break; | |
4208 | } | |
37131313 RK |
4209 | case KVM_CAP_X2APIC_API: |
4210 | r = -EINVAL; | |
4211 | if (cap->args[0] & ~KVM_X2APIC_API_VALID_FLAGS) | |
4212 | break; | |
4213 | ||
4214 | if (cap->args[0] & KVM_X2APIC_API_USE_32BIT_IDS) | |
4215 | kvm->arch.x2apic_format = true; | |
c519265f RK |
4216 | if (cap->args[0] & KVM_X2APIC_API_DISABLE_BROADCAST_QUIRK) |
4217 | kvm->arch.x2apic_broadcast_quirk_disabled = true; | |
37131313 RK |
4218 | |
4219 | r = 0; | |
4220 | break; | |
90de4a18 NA |
4221 | default: |
4222 | r = -EINVAL; | |
4223 | break; | |
4224 | } | |
4225 | return r; | |
4226 | } | |
4227 | ||
1fe779f8 CO |
4228 | long kvm_arch_vm_ioctl(struct file *filp, |
4229 | unsigned int ioctl, unsigned long arg) | |
4230 | { | |
4231 | struct kvm *kvm = filp->private_data; | |
4232 | void __user *argp = (void __user *)arg; | |
367e1319 | 4233 | int r = -ENOTTY; |
f0d66275 DH |
4234 | /* |
4235 | * This union makes it completely explicit to gcc-3.x | |
4236 | * that these two variables' stack usage should be | |
4237 | * combined, not added together. | |
4238 | */ | |
4239 | union { | |
4240 | struct kvm_pit_state ps; | |
e9f42757 | 4241 | struct kvm_pit_state2 ps2; |
c5ff41ce | 4242 | struct kvm_pit_config pit_config; |
f0d66275 | 4243 | } u; |
1fe779f8 CO |
4244 | |
4245 | switch (ioctl) { | |
4246 | case KVM_SET_TSS_ADDR: | |
4247 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
1fe779f8 | 4248 | break; |
b927a3ce SY |
4249 | case KVM_SET_IDENTITY_MAP_ADDR: { |
4250 | u64 ident_addr; | |
4251 | ||
1af1ac91 DH |
4252 | mutex_lock(&kvm->lock); |
4253 | r = -EINVAL; | |
4254 | if (kvm->created_vcpus) | |
4255 | goto set_identity_unlock; | |
b927a3ce SY |
4256 | r = -EFAULT; |
4257 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
1af1ac91 | 4258 | goto set_identity_unlock; |
b927a3ce | 4259 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); |
1af1ac91 DH |
4260 | set_identity_unlock: |
4261 | mutex_unlock(&kvm->lock); | |
b927a3ce SY |
4262 | break; |
4263 | } | |
1fe779f8 CO |
4264 | case KVM_SET_NR_MMU_PAGES: |
4265 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
1fe779f8 CO |
4266 | break; |
4267 | case KVM_GET_NR_MMU_PAGES: | |
4268 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
4269 | break; | |
3ddea128 | 4270 | case KVM_CREATE_IRQCHIP: { |
3ddea128 | 4271 | mutex_lock(&kvm->lock); |
09941366 | 4272 | |
3ddea128 | 4273 | r = -EEXIST; |
35e6eaa3 | 4274 | if (irqchip_in_kernel(kvm)) |
3ddea128 | 4275 | goto create_irqchip_unlock; |
09941366 | 4276 | |
3e515705 | 4277 | r = -EINVAL; |
557abc40 | 4278 | if (kvm->created_vcpus) |
3e515705 | 4279 | goto create_irqchip_unlock; |
09941366 RK |
4280 | |
4281 | r = kvm_pic_init(kvm); | |
4282 | if (r) | |
3ddea128 | 4283 | goto create_irqchip_unlock; |
09941366 RK |
4284 | |
4285 | r = kvm_ioapic_init(kvm); | |
4286 | if (r) { | |
09941366 | 4287 | kvm_pic_destroy(kvm); |
3ddea128 | 4288 | goto create_irqchip_unlock; |
09941366 RK |
4289 | } |
4290 | ||
399ec807 AK |
4291 | r = kvm_setup_default_irq_routing(kvm); |
4292 | if (r) { | |
72bb2fcd | 4293 | kvm_ioapic_destroy(kvm); |
09941366 | 4294 | kvm_pic_destroy(kvm); |
71ba994c | 4295 | goto create_irqchip_unlock; |
399ec807 | 4296 | } |
49776faf | 4297 | /* Write kvm->irq_routing before enabling irqchip_in_kernel. */ |
71ba994c | 4298 | smp_wmb(); |
49776faf | 4299 | kvm->arch.irqchip_mode = KVM_IRQCHIP_KERNEL; |
3ddea128 MT |
4300 | create_irqchip_unlock: |
4301 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 4302 | break; |
3ddea128 | 4303 | } |
7837699f | 4304 | case KVM_CREATE_PIT: |
c5ff41ce JK |
4305 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
4306 | goto create_pit; | |
4307 | case KVM_CREATE_PIT2: | |
4308 | r = -EFAULT; | |
4309 | if (copy_from_user(&u.pit_config, argp, | |
4310 | sizeof(struct kvm_pit_config))) | |
4311 | goto out; | |
4312 | create_pit: | |
250715a6 | 4313 | mutex_lock(&kvm->lock); |
269e05e4 AK |
4314 | r = -EEXIST; |
4315 | if (kvm->arch.vpit) | |
4316 | goto create_pit_unlock; | |
7837699f | 4317 | r = -ENOMEM; |
c5ff41ce | 4318 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
4319 | if (kvm->arch.vpit) |
4320 | r = 0; | |
269e05e4 | 4321 | create_pit_unlock: |
250715a6 | 4322 | mutex_unlock(&kvm->lock); |
7837699f | 4323 | break; |
1fe779f8 CO |
4324 | case KVM_GET_IRQCHIP: { |
4325 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 4326 | struct kvm_irqchip *chip; |
1fe779f8 | 4327 | |
ff5c2c03 SL |
4328 | chip = memdup_user(argp, sizeof(*chip)); |
4329 | if (IS_ERR(chip)) { | |
4330 | r = PTR_ERR(chip); | |
1fe779f8 | 4331 | goto out; |
ff5c2c03 SL |
4332 | } |
4333 | ||
1fe779f8 | 4334 | r = -ENXIO; |
826da321 | 4335 | if (!irqchip_kernel(kvm)) |
f0d66275 DH |
4336 | goto get_irqchip_out; |
4337 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 4338 | if (r) |
f0d66275 | 4339 | goto get_irqchip_out; |
1fe779f8 | 4340 | r = -EFAULT; |
f0d66275 DH |
4341 | if (copy_to_user(argp, chip, sizeof *chip)) |
4342 | goto get_irqchip_out; | |
1fe779f8 | 4343 | r = 0; |
f0d66275 DH |
4344 | get_irqchip_out: |
4345 | kfree(chip); | |
1fe779f8 CO |
4346 | break; |
4347 | } | |
4348 | case KVM_SET_IRQCHIP: { | |
4349 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 4350 | struct kvm_irqchip *chip; |
1fe779f8 | 4351 | |
ff5c2c03 SL |
4352 | chip = memdup_user(argp, sizeof(*chip)); |
4353 | if (IS_ERR(chip)) { | |
4354 | r = PTR_ERR(chip); | |
1fe779f8 | 4355 | goto out; |
ff5c2c03 SL |
4356 | } |
4357 | ||
1fe779f8 | 4358 | r = -ENXIO; |
826da321 | 4359 | if (!irqchip_kernel(kvm)) |
f0d66275 DH |
4360 | goto set_irqchip_out; |
4361 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 4362 | if (r) |
f0d66275 | 4363 | goto set_irqchip_out; |
1fe779f8 | 4364 | r = 0; |
f0d66275 DH |
4365 | set_irqchip_out: |
4366 | kfree(chip); | |
1fe779f8 CO |
4367 | break; |
4368 | } | |
e0f63cb9 | 4369 | case KVM_GET_PIT: { |
e0f63cb9 | 4370 | r = -EFAULT; |
f0d66275 | 4371 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
4372 | goto out; |
4373 | r = -ENXIO; | |
4374 | if (!kvm->arch.vpit) | |
4375 | goto out; | |
f0d66275 | 4376 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
4377 | if (r) |
4378 | goto out; | |
4379 | r = -EFAULT; | |
f0d66275 | 4380 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
4381 | goto out; |
4382 | r = 0; | |
4383 | break; | |
4384 | } | |
4385 | case KVM_SET_PIT: { | |
e0f63cb9 | 4386 | r = -EFAULT; |
f0d66275 | 4387 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
4388 | goto out; |
4389 | r = -ENXIO; | |
4390 | if (!kvm->arch.vpit) | |
4391 | goto out; | |
f0d66275 | 4392 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
4393 | break; |
4394 | } | |
e9f42757 BK |
4395 | case KVM_GET_PIT2: { |
4396 | r = -ENXIO; | |
4397 | if (!kvm->arch.vpit) | |
4398 | goto out; | |
4399 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
4400 | if (r) | |
4401 | goto out; | |
4402 | r = -EFAULT; | |
4403 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
4404 | goto out; | |
4405 | r = 0; | |
4406 | break; | |
4407 | } | |
4408 | case KVM_SET_PIT2: { | |
4409 | r = -EFAULT; | |
4410 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
4411 | goto out; | |
4412 | r = -ENXIO; | |
4413 | if (!kvm->arch.vpit) | |
4414 | goto out; | |
4415 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
e9f42757 BK |
4416 | break; |
4417 | } | |
52d939a0 MT |
4418 | case KVM_REINJECT_CONTROL: { |
4419 | struct kvm_reinject_control control; | |
4420 | r = -EFAULT; | |
4421 | if (copy_from_user(&control, argp, sizeof(control))) | |
4422 | goto out; | |
4423 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
52d939a0 MT |
4424 | break; |
4425 | } | |
d71ba788 PB |
4426 | case KVM_SET_BOOT_CPU_ID: |
4427 | r = 0; | |
4428 | mutex_lock(&kvm->lock); | |
557abc40 | 4429 | if (kvm->created_vcpus) |
d71ba788 PB |
4430 | r = -EBUSY; |
4431 | else | |
4432 | kvm->arch.bsp_vcpu_id = arg; | |
4433 | mutex_unlock(&kvm->lock); | |
4434 | break; | |
ffde22ac | 4435 | case KVM_XEN_HVM_CONFIG: { |
51776043 | 4436 | struct kvm_xen_hvm_config xhc; |
ffde22ac | 4437 | r = -EFAULT; |
51776043 | 4438 | if (copy_from_user(&xhc, argp, sizeof(xhc))) |
ffde22ac ES |
4439 | goto out; |
4440 | r = -EINVAL; | |
51776043 | 4441 | if (xhc.flags) |
ffde22ac | 4442 | goto out; |
51776043 | 4443 | memcpy(&kvm->arch.xen_hvm_config, &xhc, sizeof(xhc)); |
ffde22ac ES |
4444 | r = 0; |
4445 | break; | |
4446 | } | |
afbcf7ab | 4447 | case KVM_SET_CLOCK: { |
afbcf7ab GC |
4448 | struct kvm_clock_data user_ns; |
4449 | u64 now_ns; | |
afbcf7ab GC |
4450 | |
4451 | r = -EFAULT; | |
4452 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
4453 | goto out; | |
4454 | ||
4455 | r = -EINVAL; | |
4456 | if (user_ns.flags) | |
4457 | goto out; | |
4458 | ||
4459 | r = 0; | |
0bc48bea RK |
4460 | /* |
4461 | * TODO: userspace has to take care of races with VCPU_RUN, so | |
4462 | * kvm_gen_update_masterclock() can be cut down to locked | |
4463 | * pvclock_update_vm_gtod_copy(). | |
4464 | */ | |
4465 | kvm_gen_update_masterclock(kvm); | |
e891a32e | 4466 | now_ns = get_kvmclock_ns(kvm); |
108b249c | 4467 | kvm->arch.kvmclock_offset += user_ns.clock - now_ns; |
0bc48bea | 4468 | kvm_make_all_cpus_request(kvm, KVM_REQ_CLOCK_UPDATE); |
afbcf7ab GC |
4469 | break; |
4470 | } | |
4471 | case KVM_GET_CLOCK: { | |
afbcf7ab GC |
4472 | struct kvm_clock_data user_ns; |
4473 | u64 now_ns; | |
4474 | ||
e891a32e | 4475 | now_ns = get_kvmclock_ns(kvm); |
108b249c | 4476 | user_ns.clock = now_ns; |
e3fd9a93 | 4477 | user_ns.flags = kvm->arch.use_master_clock ? KVM_CLOCK_TSC_STABLE : 0; |
97e69aa6 | 4478 | memset(&user_ns.pad, 0, sizeof(user_ns.pad)); |
afbcf7ab GC |
4479 | |
4480 | r = -EFAULT; | |
4481 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
4482 | goto out; | |
4483 | r = 0; | |
4484 | break; | |
4485 | } | |
90de4a18 NA |
4486 | case KVM_ENABLE_CAP: { |
4487 | struct kvm_enable_cap cap; | |
afbcf7ab | 4488 | |
90de4a18 NA |
4489 | r = -EFAULT; |
4490 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
4491 | goto out; | |
4492 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
4493 | break; | |
4494 | } | |
5acc5c06 BS |
4495 | case KVM_MEMORY_ENCRYPT_OP: { |
4496 | r = -ENOTTY; | |
4497 | if (kvm_x86_ops->mem_enc_op) | |
4498 | r = kvm_x86_ops->mem_enc_op(kvm, argp); | |
4499 | break; | |
4500 | } | |
69eaedee BS |
4501 | case KVM_MEMORY_ENCRYPT_REG_REGION: { |
4502 | struct kvm_enc_region region; | |
4503 | ||
4504 | r = -EFAULT; | |
4505 | if (copy_from_user(®ion, argp, sizeof(region))) | |
4506 | goto out; | |
4507 | ||
4508 | r = -ENOTTY; | |
4509 | if (kvm_x86_ops->mem_enc_reg_region) | |
4510 | r = kvm_x86_ops->mem_enc_reg_region(kvm, ®ion); | |
4511 | break; | |
4512 | } | |
4513 | case KVM_MEMORY_ENCRYPT_UNREG_REGION: { | |
4514 | struct kvm_enc_region region; | |
4515 | ||
4516 | r = -EFAULT; | |
4517 | if (copy_from_user(®ion, argp, sizeof(region))) | |
4518 | goto out; | |
4519 | ||
4520 | r = -ENOTTY; | |
4521 | if (kvm_x86_ops->mem_enc_unreg_region) | |
4522 | r = kvm_x86_ops->mem_enc_unreg_region(kvm, ®ion); | |
4523 | break; | |
4524 | } | |
faeb7833 RK |
4525 | case KVM_HYPERV_EVENTFD: { |
4526 | struct kvm_hyperv_eventfd hvevfd; | |
4527 | ||
4528 | r = -EFAULT; | |
4529 | if (copy_from_user(&hvevfd, argp, sizeof(hvevfd))) | |
4530 | goto out; | |
4531 | r = kvm_vm_ioctl_hv_eventfd(kvm, &hvevfd); | |
4532 | break; | |
4533 | } | |
1fe779f8 | 4534 | default: |
ad6260da | 4535 | r = -ENOTTY; |
1fe779f8 CO |
4536 | } |
4537 | out: | |
4538 | return r; | |
4539 | } | |
4540 | ||
a16b043c | 4541 | static void kvm_init_msr_list(void) |
043405e1 CO |
4542 | { |
4543 | u32 dummy[2]; | |
4544 | unsigned i, j; | |
4545 | ||
62ef68bb | 4546 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { |
043405e1 CO |
4547 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
4548 | continue; | |
93c4adc7 PB |
4549 | |
4550 | /* | |
4551 | * Even MSRs that are valid in the host may not be exposed | |
9dbe6cf9 | 4552 | * to the guests in some cases. |
93c4adc7 PB |
4553 | */ |
4554 | switch (msrs_to_save[i]) { | |
4555 | case MSR_IA32_BNDCFGS: | |
4556 | if (!kvm_x86_ops->mpx_supported()) | |
4557 | continue; | |
4558 | break; | |
9dbe6cf9 PB |
4559 | case MSR_TSC_AUX: |
4560 | if (!kvm_x86_ops->rdtscp_supported()) | |
4561 | continue; | |
4562 | break; | |
93c4adc7 PB |
4563 | default: |
4564 | break; | |
4565 | } | |
4566 | ||
043405e1 CO |
4567 | if (j < i) |
4568 | msrs_to_save[j] = msrs_to_save[i]; | |
4569 | j++; | |
4570 | } | |
4571 | num_msrs_to_save = j; | |
62ef68bb PB |
4572 | |
4573 | for (i = j = 0; i < ARRAY_SIZE(emulated_msrs); i++) { | |
4574 | switch (emulated_msrs[i]) { | |
6d396b55 PB |
4575 | case MSR_IA32_SMBASE: |
4576 | if (!kvm_x86_ops->cpu_has_high_real_mode_segbase()) | |
4577 | continue; | |
4578 | break; | |
62ef68bb PB |
4579 | default: |
4580 | break; | |
4581 | } | |
4582 | ||
4583 | if (j < i) | |
4584 | emulated_msrs[j] = emulated_msrs[i]; | |
4585 | j++; | |
4586 | } | |
4587 | num_emulated_msrs = j; | |
801e459a TL |
4588 | |
4589 | for (i = j = 0; i < ARRAY_SIZE(msr_based_features); i++) { | |
4590 | struct kvm_msr_entry msr; | |
4591 | ||
4592 | msr.index = msr_based_features[i]; | |
66421c1e | 4593 | if (kvm_get_msr_feature(&msr)) |
801e459a TL |
4594 | continue; |
4595 | ||
4596 | if (j < i) | |
4597 | msr_based_features[j] = msr_based_features[i]; | |
4598 | j++; | |
4599 | } | |
4600 | num_msr_based_features = j; | |
043405e1 CO |
4601 | } |
4602 | ||
bda9020e MT |
4603 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
4604 | const void *v) | |
bbd9b64e | 4605 | { |
70252a10 AK |
4606 | int handled = 0; |
4607 | int n; | |
4608 | ||
4609 | do { | |
4610 | n = min(len, 8); | |
bce87cce | 4611 | if (!(lapic_in_kernel(vcpu) && |
e32edf4f NN |
4612 | !kvm_iodevice_write(vcpu, &vcpu->arch.apic->dev, addr, n, v)) |
4613 | && kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, n, v)) | |
70252a10 AK |
4614 | break; |
4615 | handled += n; | |
4616 | addr += n; | |
4617 | len -= n; | |
4618 | v += n; | |
4619 | } while (len); | |
bbd9b64e | 4620 | |
70252a10 | 4621 | return handled; |
bbd9b64e CO |
4622 | } |
4623 | ||
bda9020e | 4624 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 4625 | { |
70252a10 AK |
4626 | int handled = 0; |
4627 | int n; | |
4628 | ||
4629 | do { | |
4630 | n = min(len, 8); | |
bce87cce | 4631 | if (!(lapic_in_kernel(vcpu) && |
e32edf4f NN |
4632 | !kvm_iodevice_read(vcpu, &vcpu->arch.apic->dev, |
4633 | addr, n, v)) | |
4634 | && kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, n, v)) | |
70252a10 | 4635 | break; |
e39d200f | 4636 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, v); |
70252a10 AK |
4637 | handled += n; |
4638 | addr += n; | |
4639 | len -= n; | |
4640 | v += n; | |
4641 | } while (len); | |
bbd9b64e | 4642 | |
70252a10 | 4643 | return handled; |
bbd9b64e CO |
4644 | } |
4645 | ||
2dafc6c2 GN |
4646 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
4647 | struct kvm_segment *var, int seg) | |
4648 | { | |
4649 | kvm_x86_ops->set_segment(vcpu, var, seg); | |
4650 | } | |
4651 | ||
4652 | void kvm_get_segment(struct kvm_vcpu *vcpu, | |
4653 | struct kvm_segment *var, int seg) | |
4654 | { | |
4655 | kvm_x86_ops->get_segment(vcpu, var, seg); | |
4656 | } | |
4657 | ||
54987b7a PB |
4658 | gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, |
4659 | struct x86_exception *exception) | |
02f59dc9 JR |
4660 | { |
4661 | gpa_t t_gpa; | |
02f59dc9 JR |
4662 | |
4663 | BUG_ON(!mmu_is_nested(vcpu)); | |
4664 | ||
4665 | /* NPT walks are always user-walks */ | |
4666 | access |= PFERR_USER_MASK; | |
54987b7a | 4667 | t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, exception); |
02f59dc9 JR |
4668 | |
4669 | return t_gpa; | |
4670 | } | |
4671 | ||
ab9ae313 AK |
4672 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, |
4673 | struct x86_exception *exception) | |
1871c602 GN |
4674 | { |
4675 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
ab9ae313 | 4676 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4677 | } |
4678 | ||
ab9ae313 AK |
4679 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, |
4680 | struct x86_exception *exception) | |
1871c602 GN |
4681 | { |
4682 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
4683 | access |= PFERR_FETCH_MASK; | |
ab9ae313 | 4684 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4685 | } |
4686 | ||
ab9ae313 AK |
4687 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, |
4688 | struct x86_exception *exception) | |
1871c602 GN |
4689 | { |
4690 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
4691 | access |= PFERR_WRITE_MASK; | |
ab9ae313 | 4692 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4693 | } |
4694 | ||
4695 | /* uses this to access any guest's mapped memory without checking CPL */ | |
ab9ae313 AK |
4696 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, |
4697 | struct x86_exception *exception) | |
1871c602 | 4698 | { |
ab9ae313 | 4699 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception); |
1871c602 GN |
4700 | } |
4701 | ||
4702 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
4703 | struct kvm_vcpu *vcpu, u32 access, | |
bcc55cba | 4704 | struct x86_exception *exception) |
bbd9b64e CO |
4705 | { |
4706 | void *data = val; | |
10589a46 | 4707 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
4708 | |
4709 | while (bytes) { | |
14dfe855 | 4710 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access, |
ab9ae313 | 4711 | exception); |
bbd9b64e | 4712 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 4713 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
4714 | int ret; |
4715 | ||
bcc55cba | 4716 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4717 | return X86EMUL_PROPAGATE_FAULT; |
54bf36aa PB |
4718 | ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, data, |
4719 | offset, toread); | |
10589a46 | 4720 | if (ret < 0) { |
c3cd7ffa | 4721 | r = X86EMUL_IO_NEEDED; |
10589a46 MT |
4722 | goto out; |
4723 | } | |
bbd9b64e | 4724 | |
77c2002e IE |
4725 | bytes -= toread; |
4726 | data += toread; | |
4727 | addr += toread; | |
bbd9b64e | 4728 | } |
10589a46 | 4729 | out: |
10589a46 | 4730 | return r; |
bbd9b64e | 4731 | } |
77c2002e | 4732 | |
1871c602 | 4733 | /* used for instruction fetching */ |
0f65dd70 AK |
4734 | static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt, |
4735 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4736 | struct x86_exception *exception) |
1871c602 | 4737 | { |
0f65dd70 | 4738 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4739 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
44583cba PB |
4740 | unsigned offset; |
4741 | int ret; | |
0f65dd70 | 4742 | |
44583cba PB |
4743 | /* Inline kvm_read_guest_virt_helper for speed. */ |
4744 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access|PFERR_FETCH_MASK, | |
4745 | exception); | |
4746 | if (unlikely(gpa == UNMAPPED_GVA)) | |
4747 | return X86EMUL_PROPAGATE_FAULT; | |
4748 | ||
4749 | offset = addr & (PAGE_SIZE-1); | |
4750 | if (WARN_ON(offset + bytes > PAGE_SIZE)) | |
4751 | bytes = (unsigned)PAGE_SIZE - offset; | |
54bf36aa PB |
4752 | ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, val, |
4753 | offset, bytes); | |
44583cba PB |
4754 | if (unlikely(ret < 0)) |
4755 | return X86EMUL_IO_NEEDED; | |
4756 | ||
4757 | return X86EMUL_CONTINUE; | |
1871c602 GN |
4758 | } |
4759 | ||
064aea77 | 4760 | int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4761 | gva_t addr, void *val, unsigned int bytes, |
bcc55cba | 4762 | struct x86_exception *exception) |
1871c602 | 4763 | { |
0f65dd70 | 4764 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4765 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
0f65dd70 | 4766 | |
1871c602 | 4767 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, |
bcc55cba | 4768 | exception); |
1871c602 | 4769 | } |
064aea77 | 4770 | EXPORT_SYMBOL_GPL(kvm_read_guest_virt); |
1871c602 | 4771 | |
0f65dd70 AK |
4772 | static int kvm_read_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
4773 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4774 | struct x86_exception *exception) |
1871c602 | 4775 | { |
0f65dd70 | 4776 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
bcc55cba | 4777 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception); |
1871c602 GN |
4778 | } |
4779 | ||
7a036a6f RK |
4780 | static int kvm_read_guest_phys_system(struct x86_emulate_ctxt *ctxt, |
4781 | unsigned long addr, void *val, unsigned int bytes) | |
4782 | { | |
4783 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4784 | int r = kvm_vcpu_read_guest(vcpu, addr, val, bytes); | |
4785 | ||
4786 | return r < 0 ? X86EMUL_IO_NEEDED : X86EMUL_CONTINUE; | |
4787 | } | |
4788 | ||
6a4d7550 | 4789 | int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4790 | gva_t addr, void *val, |
2dafc6c2 | 4791 | unsigned int bytes, |
bcc55cba | 4792 | struct x86_exception *exception) |
77c2002e | 4793 | { |
0f65dd70 | 4794 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
77c2002e IE |
4795 | void *data = val; |
4796 | int r = X86EMUL_CONTINUE; | |
4797 | ||
4798 | while (bytes) { | |
14dfe855 JR |
4799 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, |
4800 | PFERR_WRITE_MASK, | |
ab9ae313 | 4801 | exception); |
77c2002e IE |
4802 | unsigned offset = addr & (PAGE_SIZE-1); |
4803 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
4804 | int ret; | |
4805 | ||
bcc55cba | 4806 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4807 | return X86EMUL_PROPAGATE_FAULT; |
54bf36aa | 4808 | ret = kvm_vcpu_write_guest(vcpu, gpa, data, towrite); |
77c2002e | 4809 | if (ret < 0) { |
c3cd7ffa | 4810 | r = X86EMUL_IO_NEEDED; |
77c2002e IE |
4811 | goto out; |
4812 | } | |
4813 | ||
4814 | bytes -= towrite; | |
4815 | data += towrite; | |
4816 | addr += towrite; | |
4817 | } | |
4818 | out: | |
4819 | return r; | |
4820 | } | |
6a4d7550 | 4821 | EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system); |
77c2002e | 4822 | |
0f89b207 TL |
4823 | static int vcpu_is_mmio_gpa(struct kvm_vcpu *vcpu, unsigned long gva, |
4824 | gpa_t gpa, bool write) | |
4825 | { | |
4826 | /* For APIC access vmexit */ | |
4827 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4828 | return 1; | |
4829 | ||
4830 | if (vcpu_match_mmio_gpa(vcpu, gpa)) { | |
4831 | trace_vcpu_match_mmio(gva, gpa, write, true); | |
4832 | return 1; | |
4833 | } | |
4834 | ||
4835 | return 0; | |
4836 | } | |
4837 | ||
af7cc7d1 XG |
4838 | static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva, |
4839 | gpa_t *gpa, struct x86_exception *exception, | |
4840 | bool write) | |
4841 | { | |
97d64b78 AK |
4842 | u32 access = ((kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0) |
4843 | | (write ? PFERR_WRITE_MASK : 0); | |
af7cc7d1 | 4844 | |
be94f6b7 HH |
4845 | /* |
4846 | * currently PKRU is only applied to ept enabled guest so | |
4847 | * there is no pkey in EPT page table for L1 guest or EPT | |
4848 | * shadow page table for L2 guest. | |
4849 | */ | |
97d64b78 | 4850 | if (vcpu_match_mmio_gva(vcpu, gva) |
97ec8c06 | 4851 | && !permission_fault(vcpu, vcpu->arch.walk_mmu, |
be94f6b7 | 4852 | vcpu->arch.access, 0, access)) { |
bebb106a XG |
4853 | *gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT | |
4854 | (gva & (PAGE_SIZE - 1)); | |
4f022648 | 4855 | trace_vcpu_match_mmio(gva, *gpa, write, false); |
bebb106a XG |
4856 | return 1; |
4857 | } | |
4858 | ||
af7cc7d1 XG |
4859 | *gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
4860 | ||
4861 | if (*gpa == UNMAPPED_GVA) | |
4862 | return -1; | |
4863 | ||
0f89b207 | 4864 | return vcpu_is_mmio_gpa(vcpu, gva, *gpa, write); |
af7cc7d1 XG |
4865 | } |
4866 | ||
3200f405 | 4867 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
bcc55cba | 4868 | const void *val, int bytes) |
bbd9b64e CO |
4869 | { |
4870 | int ret; | |
4871 | ||
54bf36aa | 4872 | ret = kvm_vcpu_write_guest(vcpu, gpa, val, bytes); |
9f811285 | 4873 | if (ret < 0) |
bbd9b64e | 4874 | return 0; |
0eb05bf2 | 4875 | kvm_page_track_write(vcpu, gpa, val, bytes); |
bbd9b64e CO |
4876 | return 1; |
4877 | } | |
4878 | ||
77d197b2 XG |
4879 | struct read_write_emulator_ops { |
4880 | int (*read_write_prepare)(struct kvm_vcpu *vcpu, void *val, | |
4881 | int bytes); | |
4882 | int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4883 | void *val, int bytes); | |
4884 | int (*read_write_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4885 | int bytes, void *val); | |
4886 | int (*read_write_exit_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4887 | void *val, int bytes); | |
4888 | bool write; | |
4889 | }; | |
4890 | ||
4891 | static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes) | |
4892 | { | |
4893 | if (vcpu->mmio_read_completed) { | |
77d197b2 | 4894 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
e39d200f | 4895 | vcpu->mmio_fragments[0].gpa, val); |
77d197b2 XG |
4896 | vcpu->mmio_read_completed = 0; |
4897 | return 1; | |
4898 | } | |
4899 | ||
4900 | return 0; | |
4901 | } | |
4902 | ||
4903 | static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4904 | void *val, int bytes) | |
4905 | { | |
54bf36aa | 4906 | return !kvm_vcpu_read_guest(vcpu, gpa, val, bytes); |
77d197b2 XG |
4907 | } |
4908 | ||
4909 | static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4910 | void *val, int bytes) | |
4911 | { | |
4912 | return emulator_write_phys(vcpu, gpa, val, bytes); | |
4913 | } | |
4914 | ||
4915 | static int write_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val) | |
4916 | { | |
e39d200f | 4917 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, val); |
77d197b2 XG |
4918 | return vcpu_mmio_write(vcpu, gpa, bytes, val); |
4919 | } | |
4920 | ||
4921 | static int read_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4922 | void *val, int bytes) | |
4923 | { | |
e39d200f | 4924 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, NULL); |
77d197b2 XG |
4925 | return X86EMUL_IO_NEEDED; |
4926 | } | |
4927 | ||
4928 | static int write_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4929 | void *val, int bytes) | |
4930 | { | |
f78146b0 AK |
4931 | struct kvm_mmio_fragment *frag = &vcpu->mmio_fragments[0]; |
4932 | ||
87da7e66 | 4933 | memcpy(vcpu->run->mmio.data, frag->data, min(8u, frag->len)); |
77d197b2 XG |
4934 | return X86EMUL_CONTINUE; |
4935 | } | |
4936 | ||
0fbe9b0b | 4937 | static const struct read_write_emulator_ops read_emultor = { |
77d197b2 XG |
4938 | .read_write_prepare = read_prepare, |
4939 | .read_write_emulate = read_emulate, | |
4940 | .read_write_mmio = vcpu_mmio_read, | |
4941 | .read_write_exit_mmio = read_exit_mmio, | |
4942 | }; | |
4943 | ||
0fbe9b0b | 4944 | static const struct read_write_emulator_ops write_emultor = { |
77d197b2 XG |
4945 | .read_write_emulate = write_emulate, |
4946 | .read_write_mmio = write_mmio, | |
4947 | .read_write_exit_mmio = write_exit_mmio, | |
4948 | .write = true, | |
4949 | }; | |
4950 | ||
22388a3c XG |
4951 | static int emulator_read_write_onepage(unsigned long addr, void *val, |
4952 | unsigned int bytes, | |
4953 | struct x86_exception *exception, | |
4954 | struct kvm_vcpu *vcpu, | |
0fbe9b0b | 4955 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 4956 | { |
af7cc7d1 XG |
4957 | gpa_t gpa; |
4958 | int handled, ret; | |
22388a3c | 4959 | bool write = ops->write; |
f78146b0 | 4960 | struct kvm_mmio_fragment *frag; |
0f89b207 TL |
4961 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
4962 | ||
4963 | /* | |
4964 | * If the exit was due to a NPF we may already have a GPA. | |
4965 | * If the GPA is present, use it to avoid the GVA to GPA table walk. | |
4966 | * Note, this cannot be used on string operations since string | |
4967 | * operation using rep will only have the initial GPA from the NPF | |
4968 | * occurred. | |
4969 | */ | |
4970 | if (vcpu->arch.gpa_available && | |
4971 | emulator_can_use_gpa(ctxt) && | |
618232e2 BS |
4972 | (addr & ~PAGE_MASK) == (vcpu->arch.gpa_val & ~PAGE_MASK)) { |
4973 | gpa = vcpu->arch.gpa_val; | |
4974 | ret = vcpu_is_mmio_gpa(vcpu, addr, gpa, write); | |
4975 | } else { | |
4976 | ret = vcpu_mmio_gva_to_gpa(vcpu, addr, &gpa, exception, write); | |
4977 | if (ret < 0) | |
4978 | return X86EMUL_PROPAGATE_FAULT; | |
0f89b207 | 4979 | } |
10589a46 | 4980 | |
618232e2 | 4981 | if (!ret && ops->read_write_emulate(vcpu, gpa, val, bytes)) |
bbd9b64e CO |
4982 | return X86EMUL_CONTINUE; |
4983 | ||
bbd9b64e CO |
4984 | /* |
4985 | * Is this MMIO handled locally? | |
4986 | */ | |
22388a3c | 4987 | handled = ops->read_write_mmio(vcpu, gpa, bytes, val); |
70252a10 | 4988 | if (handled == bytes) |
bbd9b64e | 4989 | return X86EMUL_CONTINUE; |
bbd9b64e | 4990 | |
70252a10 AK |
4991 | gpa += handled; |
4992 | bytes -= handled; | |
4993 | val += handled; | |
4994 | ||
87da7e66 XG |
4995 | WARN_ON(vcpu->mmio_nr_fragments >= KVM_MAX_MMIO_FRAGMENTS); |
4996 | frag = &vcpu->mmio_fragments[vcpu->mmio_nr_fragments++]; | |
4997 | frag->gpa = gpa; | |
4998 | frag->data = val; | |
4999 | frag->len = bytes; | |
f78146b0 | 5000 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
5001 | } |
5002 | ||
52eb5a6d XL |
5003 | static int emulator_read_write(struct x86_emulate_ctxt *ctxt, |
5004 | unsigned long addr, | |
22388a3c XG |
5005 | void *val, unsigned int bytes, |
5006 | struct x86_exception *exception, | |
0fbe9b0b | 5007 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 5008 | { |
0f65dd70 | 5009 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
f78146b0 AK |
5010 | gpa_t gpa; |
5011 | int rc; | |
5012 | ||
5013 | if (ops->read_write_prepare && | |
5014 | ops->read_write_prepare(vcpu, val, bytes)) | |
5015 | return X86EMUL_CONTINUE; | |
5016 | ||
5017 | vcpu->mmio_nr_fragments = 0; | |
0f65dd70 | 5018 | |
bbd9b64e CO |
5019 | /* Crossing a page boundary? */ |
5020 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
f78146b0 | 5021 | int now; |
bbd9b64e CO |
5022 | |
5023 | now = -addr & ~PAGE_MASK; | |
22388a3c XG |
5024 | rc = emulator_read_write_onepage(addr, val, now, exception, |
5025 | vcpu, ops); | |
5026 | ||
bbd9b64e CO |
5027 | if (rc != X86EMUL_CONTINUE) |
5028 | return rc; | |
5029 | addr += now; | |
bac15531 NA |
5030 | if (ctxt->mode != X86EMUL_MODE_PROT64) |
5031 | addr = (u32)addr; | |
bbd9b64e CO |
5032 | val += now; |
5033 | bytes -= now; | |
5034 | } | |
22388a3c | 5035 | |
f78146b0 AK |
5036 | rc = emulator_read_write_onepage(addr, val, bytes, exception, |
5037 | vcpu, ops); | |
5038 | if (rc != X86EMUL_CONTINUE) | |
5039 | return rc; | |
5040 | ||
5041 | if (!vcpu->mmio_nr_fragments) | |
5042 | return rc; | |
5043 | ||
5044 | gpa = vcpu->mmio_fragments[0].gpa; | |
5045 | ||
5046 | vcpu->mmio_needed = 1; | |
5047 | vcpu->mmio_cur_fragment = 0; | |
5048 | ||
87da7e66 | 5049 | vcpu->run->mmio.len = min(8u, vcpu->mmio_fragments[0].len); |
f78146b0 AK |
5050 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = ops->write; |
5051 | vcpu->run->exit_reason = KVM_EXIT_MMIO; | |
5052 | vcpu->run->mmio.phys_addr = gpa; | |
5053 | ||
5054 | return ops->read_write_exit_mmio(vcpu, gpa, val, bytes); | |
22388a3c XG |
5055 | } |
5056 | ||
5057 | static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt, | |
5058 | unsigned long addr, | |
5059 | void *val, | |
5060 | unsigned int bytes, | |
5061 | struct x86_exception *exception) | |
5062 | { | |
5063 | return emulator_read_write(ctxt, addr, val, bytes, | |
5064 | exception, &read_emultor); | |
5065 | } | |
5066 | ||
52eb5a6d | 5067 | static int emulator_write_emulated(struct x86_emulate_ctxt *ctxt, |
22388a3c XG |
5068 | unsigned long addr, |
5069 | const void *val, | |
5070 | unsigned int bytes, | |
5071 | struct x86_exception *exception) | |
5072 | { | |
5073 | return emulator_read_write(ctxt, addr, (void *)val, bytes, | |
5074 | exception, &write_emultor); | |
bbd9b64e | 5075 | } |
bbd9b64e | 5076 | |
daea3e73 AK |
5077 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
5078 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) | |
5079 | ||
5080 | #ifdef CONFIG_X86_64 | |
5081 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) | |
5082 | #else | |
5083 | # define CMPXCHG64(ptr, old, new) \ | |
9749a6c0 | 5084 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
daea3e73 AK |
5085 | #endif |
5086 | ||
0f65dd70 AK |
5087 | static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, |
5088 | unsigned long addr, | |
bbd9b64e CO |
5089 | const void *old, |
5090 | const void *new, | |
5091 | unsigned int bytes, | |
0f65dd70 | 5092 | struct x86_exception *exception) |
bbd9b64e | 5093 | { |
0f65dd70 | 5094 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
daea3e73 AK |
5095 | gpa_t gpa; |
5096 | struct page *page; | |
5097 | char *kaddr; | |
5098 | bool exchanged; | |
2bacc55c | 5099 | |
daea3e73 AK |
5100 | /* guests cmpxchg8b have to be emulated atomically */ |
5101 | if (bytes > 8 || (bytes & (bytes - 1))) | |
5102 | goto emul_write; | |
10589a46 | 5103 | |
daea3e73 | 5104 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
2bacc55c | 5105 | |
daea3e73 AK |
5106 | if (gpa == UNMAPPED_GVA || |
5107 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
5108 | goto emul_write; | |
2bacc55c | 5109 | |
daea3e73 AK |
5110 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
5111 | goto emul_write; | |
72dc67a6 | 5112 | |
54bf36aa | 5113 | page = kvm_vcpu_gfn_to_page(vcpu, gpa >> PAGE_SHIFT); |
32cad84f | 5114 | if (is_error_page(page)) |
c19b8bd6 | 5115 | goto emul_write; |
72dc67a6 | 5116 | |
8fd75e12 | 5117 | kaddr = kmap_atomic(page); |
daea3e73 AK |
5118 | kaddr += offset_in_page(gpa); |
5119 | switch (bytes) { | |
5120 | case 1: | |
5121 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); | |
5122 | break; | |
5123 | case 2: | |
5124 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); | |
5125 | break; | |
5126 | case 4: | |
5127 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); | |
5128 | break; | |
5129 | case 8: | |
5130 | exchanged = CMPXCHG64(kaddr, old, new); | |
5131 | break; | |
5132 | default: | |
5133 | BUG(); | |
2bacc55c | 5134 | } |
8fd75e12 | 5135 | kunmap_atomic(kaddr); |
daea3e73 AK |
5136 | kvm_release_page_dirty(page); |
5137 | ||
5138 | if (!exchanged) | |
5139 | return X86EMUL_CMPXCHG_FAILED; | |
5140 | ||
54bf36aa | 5141 | kvm_vcpu_mark_page_dirty(vcpu, gpa >> PAGE_SHIFT); |
0eb05bf2 | 5142 | kvm_page_track_write(vcpu, gpa, new, bytes); |
8f6abd06 GN |
5143 | |
5144 | return X86EMUL_CONTINUE; | |
4a5f48f6 | 5145 | |
3200f405 | 5146 | emul_write: |
daea3e73 | 5147 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c | 5148 | |
0f65dd70 | 5149 | return emulator_write_emulated(ctxt, addr, new, bytes, exception); |
bbd9b64e CO |
5150 | } |
5151 | ||
cf8f70bf GN |
5152 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
5153 | { | |
cbfc6c91 | 5154 | int r = 0, i; |
cf8f70bf | 5155 | |
cbfc6c91 WL |
5156 | for (i = 0; i < vcpu->arch.pio.count; i++) { |
5157 | if (vcpu->arch.pio.in) | |
5158 | r = kvm_io_bus_read(vcpu, KVM_PIO_BUS, vcpu->arch.pio.port, | |
5159 | vcpu->arch.pio.size, pd); | |
5160 | else | |
5161 | r = kvm_io_bus_write(vcpu, KVM_PIO_BUS, | |
5162 | vcpu->arch.pio.port, vcpu->arch.pio.size, | |
5163 | pd); | |
5164 | if (r) | |
5165 | break; | |
5166 | pd += vcpu->arch.pio.size; | |
5167 | } | |
cf8f70bf GN |
5168 | return r; |
5169 | } | |
5170 | ||
6f6fbe98 XG |
5171 | static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size, |
5172 | unsigned short port, void *val, | |
5173 | unsigned int count, bool in) | |
cf8f70bf | 5174 | { |
cf8f70bf | 5175 | vcpu->arch.pio.port = port; |
6f6fbe98 | 5176 | vcpu->arch.pio.in = in; |
7972995b | 5177 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
5178 | vcpu->arch.pio.size = size; |
5179 | ||
5180 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
7972995b | 5181 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
5182 | return 1; |
5183 | } | |
5184 | ||
5185 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
6f6fbe98 | 5186 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; |
cf8f70bf GN |
5187 | vcpu->run->io.size = size; |
5188 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
5189 | vcpu->run->io.count = count; | |
5190 | vcpu->run->io.port = port; | |
5191 | ||
5192 | return 0; | |
5193 | } | |
5194 | ||
6f6fbe98 XG |
5195 | static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt, |
5196 | int size, unsigned short port, void *val, | |
5197 | unsigned int count) | |
cf8f70bf | 5198 | { |
ca1d4a9e | 5199 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
6f6fbe98 | 5200 | int ret; |
ca1d4a9e | 5201 | |
6f6fbe98 XG |
5202 | if (vcpu->arch.pio.count) |
5203 | goto data_avail; | |
cf8f70bf | 5204 | |
cbfc6c91 WL |
5205 | memset(vcpu->arch.pio_data, 0, size * count); |
5206 | ||
6f6fbe98 XG |
5207 | ret = emulator_pio_in_out(vcpu, size, port, val, count, true); |
5208 | if (ret) { | |
5209 | data_avail: | |
5210 | memcpy(val, vcpu->arch.pio_data, size * count); | |
1171903d | 5211 | trace_kvm_pio(KVM_PIO_IN, port, size, count, vcpu->arch.pio_data); |
7972995b | 5212 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
5213 | return 1; |
5214 | } | |
5215 | ||
cf8f70bf GN |
5216 | return 0; |
5217 | } | |
5218 | ||
6f6fbe98 XG |
5219 | static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt, |
5220 | int size, unsigned short port, | |
5221 | const void *val, unsigned int count) | |
5222 | { | |
5223 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5224 | ||
5225 | memcpy(vcpu->arch.pio_data, val, size * count); | |
1171903d | 5226 | trace_kvm_pio(KVM_PIO_OUT, port, size, count, vcpu->arch.pio_data); |
6f6fbe98 XG |
5227 | return emulator_pio_in_out(vcpu, size, port, (void *)val, count, false); |
5228 | } | |
5229 | ||
bbd9b64e CO |
5230 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
5231 | { | |
5232 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
5233 | } | |
5234 | ||
3cb16fe7 | 5235 | static void emulator_invlpg(struct x86_emulate_ctxt *ctxt, ulong address) |
bbd9b64e | 5236 | { |
3cb16fe7 | 5237 | kvm_mmu_invlpg(emul_to_vcpu(ctxt), address); |
bbd9b64e CO |
5238 | } |
5239 | ||
ae6a2375 | 5240 | static int kvm_emulate_wbinvd_noskip(struct kvm_vcpu *vcpu) |
f5f48ee1 SY |
5241 | { |
5242 | if (!need_emulate_wbinvd(vcpu)) | |
5243 | return X86EMUL_CONTINUE; | |
5244 | ||
5245 | if (kvm_x86_ops->has_wbinvd_exit()) { | |
2eec7343 JK |
5246 | int cpu = get_cpu(); |
5247 | ||
5248 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
f5f48ee1 SY |
5249 | smp_call_function_many(vcpu->arch.wbinvd_dirty_mask, |
5250 | wbinvd_ipi, NULL, 1); | |
2eec7343 | 5251 | put_cpu(); |
f5f48ee1 | 5252 | cpumask_clear(vcpu->arch.wbinvd_dirty_mask); |
2eec7343 JK |
5253 | } else |
5254 | wbinvd(); | |
f5f48ee1 SY |
5255 | return X86EMUL_CONTINUE; |
5256 | } | |
5cb56059 JS |
5257 | |
5258 | int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
5259 | { | |
6affcbed KH |
5260 | kvm_emulate_wbinvd_noskip(vcpu); |
5261 | return kvm_skip_emulated_instruction(vcpu); | |
5cb56059 | 5262 | } |
f5f48ee1 SY |
5263 | EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd); |
5264 | ||
5cb56059 JS |
5265 | |
5266 | ||
bcaf5cc5 AK |
5267 | static void emulator_wbinvd(struct x86_emulate_ctxt *ctxt) |
5268 | { | |
5cb56059 | 5269 | kvm_emulate_wbinvd_noskip(emul_to_vcpu(ctxt)); |
bcaf5cc5 AK |
5270 | } |
5271 | ||
52eb5a6d XL |
5272 | static int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, |
5273 | unsigned long *dest) | |
bbd9b64e | 5274 | { |
16f8a6f9 | 5275 | return kvm_get_dr(emul_to_vcpu(ctxt), dr, dest); |
bbd9b64e CO |
5276 | } |
5277 | ||
52eb5a6d XL |
5278 | static int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, |
5279 | unsigned long value) | |
bbd9b64e | 5280 | { |
338dbc97 | 5281 | |
717746e3 | 5282 | return __kvm_set_dr(emul_to_vcpu(ctxt), dr, value); |
bbd9b64e CO |
5283 | } |
5284 | ||
52a46617 | 5285 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
5fdbf976 | 5286 | { |
52a46617 | 5287 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
5fdbf976 MT |
5288 | } |
5289 | ||
717746e3 | 5290 | static unsigned long emulator_get_cr(struct x86_emulate_ctxt *ctxt, int cr) |
bbd9b64e | 5291 | { |
717746e3 | 5292 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
52a46617 GN |
5293 | unsigned long value; |
5294 | ||
5295 | switch (cr) { | |
5296 | case 0: | |
5297 | value = kvm_read_cr0(vcpu); | |
5298 | break; | |
5299 | case 2: | |
5300 | value = vcpu->arch.cr2; | |
5301 | break; | |
5302 | case 3: | |
9f8fe504 | 5303 | value = kvm_read_cr3(vcpu); |
52a46617 GN |
5304 | break; |
5305 | case 4: | |
5306 | value = kvm_read_cr4(vcpu); | |
5307 | break; | |
5308 | case 8: | |
5309 | value = kvm_get_cr8(vcpu); | |
5310 | break; | |
5311 | default: | |
a737f256 | 5312 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
52a46617 GN |
5313 | return 0; |
5314 | } | |
5315 | ||
5316 | return value; | |
5317 | } | |
5318 | ||
717746e3 | 5319 | static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val) |
52a46617 | 5320 | { |
717746e3 | 5321 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
0f12244f GN |
5322 | int res = 0; |
5323 | ||
52a46617 GN |
5324 | switch (cr) { |
5325 | case 0: | |
49a9b07e | 5326 | res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
52a46617 GN |
5327 | break; |
5328 | case 2: | |
5329 | vcpu->arch.cr2 = val; | |
5330 | break; | |
5331 | case 3: | |
2390218b | 5332 | res = kvm_set_cr3(vcpu, val); |
52a46617 GN |
5333 | break; |
5334 | case 4: | |
a83b29c6 | 5335 | res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
52a46617 GN |
5336 | break; |
5337 | case 8: | |
eea1cff9 | 5338 | res = kvm_set_cr8(vcpu, val); |
52a46617 GN |
5339 | break; |
5340 | default: | |
a737f256 | 5341 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
0f12244f | 5342 | res = -1; |
52a46617 | 5343 | } |
0f12244f GN |
5344 | |
5345 | return res; | |
52a46617 GN |
5346 | } |
5347 | ||
717746e3 | 5348 | static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt) |
9c537244 | 5349 | { |
717746e3 | 5350 | return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt)); |
9c537244 GN |
5351 | } |
5352 | ||
4bff1e86 | 5353 | static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
2dafc6c2 | 5354 | { |
4bff1e86 | 5355 | kvm_x86_ops->get_gdt(emul_to_vcpu(ctxt), dt); |
2dafc6c2 GN |
5356 | } |
5357 | ||
4bff1e86 | 5358 | static void emulator_get_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
160ce1f1 | 5359 | { |
4bff1e86 | 5360 | kvm_x86_ops->get_idt(emul_to_vcpu(ctxt), dt); |
160ce1f1 MG |
5361 | } |
5362 | ||
1ac9d0cf AK |
5363 | static void emulator_set_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
5364 | { | |
5365 | kvm_x86_ops->set_gdt(emul_to_vcpu(ctxt), dt); | |
5366 | } | |
5367 | ||
5368 | static void emulator_set_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) | |
5369 | { | |
5370 | kvm_x86_ops->set_idt(emul_to_vcpu(ctxt), dt); | |
5371 | } | |
5372 | ||
4bff1e86 AK |
5373 | static unsigned long emulator_get_cached_segment_base( |
5374 | struct x86_emulate_ctxt *ctxt, int seg) | |
5951c442 | 5375 | { |
4bff1e86 | 5376 | return get_segment_base(emul_to_vcpu(ctxt), seg); |
5951c442 GN |
5377 | } |
5378 | ||
1aa36616 AK |
5379 | static bool emulator_get_segment(struct x86_emulate_ctxt *ctxt, u16 *selector, |
5380 | struct desc_struct *desc, u32 *base3, | |
5381 | int seg) | |
2dafc6c2 GN |
5382 | { |
5383 | struct kvm_segment var; | |
5384 | ||
4bff1e86 | 5385 | kvm_get_segment(emul_to_vcpu(ctxt), &var, seg); |
1aa36616 | 5386 | *selector = var.selector; |
2dafc6c2 | 5387 | |
378a8b09 GN |
5388 | if (var.unusable) { |
5389 | memset(desc, 0, sizeof(*desc)); | |
f0367ee1 RK |
5390 | if (base3) |
5391 | *base3 = 0; | |
2dafc6c2 | 5392 | return false; |
378a8b09 | 5393 | } |
2dafc6c2 GN |
5394 | |
5395 | if (var.g) | |
5396 | var.limit >>= 12; | |
5397 | set_desc_limit(desc, var.limit); | |
5398 | set_desc_base(desc, (unsigned long)var.base); | |
5601d05b GN |
5399 | #ifdef CONFIG_X86_64 |
5400 | if (base3) | |
5401 | *base3 = var.base >> 32; | |
5402 | #endif | |
2dafc6c2 GN |
5403 | desc->type = var.type; |
5404 | desc->s = var.s; | |
5405 | desc->dpl = var.dpl; | |
5406 | desc->p = var.present; | |
5407 | desc->avl = var.avl; | |
5408 | desc->l = var.l; | |
5409 | desc->d = var.db; | |
5410 | desc->g = var.g; | |
5411 | ||
5412 | return true; | |
5413 | } | |
5414 | ||
1aa36616 AK |
5415 | static void emulator_set_segment(struct x86_emulate_ctxt *ctxt, u16 selector, |
5416 | struct desc_struct *desc, u32 base3, | |
5417 | int seg) | |
2dafc6c2 | 5418 | { |
4bff1e86 | 5419 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
2dafc6c2 GN |
5420 | struct kvm_segment var; |
5421 | ||
1aa36616 | 5422 | var.selector = selector; |
2dafc6c2 | 5423 | var.base = get_desc_base(desc); |
5601d05b GN |
5424 | #ifdef CONFIG_X86_64 |
5425 | var.base |= ((u64)base3) << 32; | |
5426 | #endif | |
2dafc6c2 GN |
5427 | var.limit = get_desc_limit(desc); |
5428 | if (desc->g) | |
5429 | var.limit = (var.limit << 12) | 0xfff; | |
5430 | var.type = desc->type; | |
2dafc6c2 GN |
5431 | var.dpl = desc->dpl; |
5432 | var.db = desc->d; | |
5433 | var.s = desc->s; | |
5434 | var.l = desc->l; | |
5435 | var.g = desc->g; | |
5436 | var.avl = desc->avl; | |
5437 | var.present = desc->p; | |
5438 | var.unusable = !var.present; | |
5439 | var.padding = 0; | |
5440 | ||
5441 | kvm_set_segment(vcpu, &var, seg); | |
5442 | return; | |
5443 | } | |
5444 | ||
717746e3 AK |
5445 | static int emulator_get_msr(struct x86_emulate_ctxt *ctxt, |
5446 | u32 msr_index, u64 *pdata) | |
5447 | { | |
609e36d3 PB |
5448 | struct msr_data msr; |
5449 | int r; | |
5450 | ||
5451 | msr.index = msr_index; | |
5452 | msr.host_initiated = false; | |
5453 | r = kvm_get_msr(emul_to_vcpu(ctxt), &msr); | |
5454 | if (r) | |
5455 | return r; | |
5456 | ||
5457 | *pdata = msr.data; | |
5458 | return 0; | |
717746e3 AK |
5459 | } |
5460 | ||
5461 | static int emulator_set_msr(struct x86_emulate_ctxt *ctxt, | |
5462 | u32 msr_index, u64 data) | |
5463 | { | |
8fe8ab46 WA |
5464 | struct msr_data msr; |
5465 | ||
5466 | msr.data = data; | |
5467 | msr.index = msr_index; | |
5468 | msr.host_initiated = false; | |
5469 | return kvm_set_msr(emul_to_vcpu(ctxt), &msr); | |
717746e3 AK |
5470 | } |
5471 | ||
64d60670 PB |
5472 | static u64 emulator_get_smbase(struct x86_emulate_ctxt *ctxt) |
5473 | { | |
5474 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5475 | ||
5476 | return vcpu->arch.smbase; | |
5477 | } | |
5478 | ||
5479 | static void emulator_set_smbase(struct x86_emulate_ctxt *ctxt, u64 smbase) | |
5480 | { | |
5481 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5482 | ||
5483 | vcpu->arch.smbase = smbase; | |
5484 | } | |
5485 | ||
67f4d428 NA |
5486 | static int emulator_check_pmc(struct x86_emulate_ctxt *ctxt, |
5487 | u32 pmc) | |
5488 | { | |
c6702c9d | 5489 | return kvm_pmu_is_valid_msr_idx(emul_to_vcpu(ctxt), pmc); |
67f4d428 NA |
5490 | } |
5491 | ||
222d21aa AK |
5492 | static int emulator_read_pmc(struct x86_emulate_ctxt *ctxt, |
5493 | u32 pmc, u64 *pdata) | |
5494 | { | |
c6702c9d | 5495 | return kvm_pmu_rdpmc(emul_to_vcpu(ctxt), pmc, pdata); |
222d21aa AK |
5496 | } |
5497 | ||
6c3287f7 AK |
5498 | static void emulator_halt(struct x86_emulate_ctxt *ctxt) |
5499 | { | |
5500 | emul_to_vcpu(ctxt)->arch.halt_request = 1; | |
5501 | } | |
5502 | ||
2953538e | 5503 | static int emulator_intercept(struct x86_emulate_ctxt *ctxt, |
8a76d7f2 | 5504 | struct x86_instruction_info *info, |
c4f035c6 AK |
5505 | enum x86_intercept_stage stage) |
5506 | { | |
2953538e | 5507 | return kvm_x86_ops->check_intercept(emul_to_vcpu(ctxt), info, stage); |
c4f035c6 AK |
5508 | } |
5509 | ||
e911eb3b YZ |
5510 | static bool emulator_get_cpuid(struct x86_emulate_ctxt *ctxt, |
5511 | u32 *eax, u32 *ebx, u32 *ecx, u32 *edx, bool check_limit) | |
bdb42f5a | 5512 | { |
e911eb3b | 5513 | return kvm_cpuid(emul_to_vcpu(ctxt), eax, ebx, ecx, edx, check_limit); |
bdb42f5a SB |
5514 | } |
5515 | ||
dd856efa AK |
5516 | static ulong emulator_read_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg) |
5517 | { | |
5518 | return kvm_register_read(emul_to_vcpu(ctxt), reg); | |
5519 | } | |
5520 | ||
5521 | static void emulator_write_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg, ulong val) | |
5522 | { | |
5523 | kvm_register_write(emul_to_vcpu(ctxt), reg, val); | |
5524 | } | |
5525 | ||
801806d9 NA |
5526 | static void emulator_set_nmi_mask(struct x86_emulate_ctxt *ctxt, bool masked) |
5527 | { | |
5528 | kvm_x86_ops->set_nmi_mask(emul_to_vcpu(ctxt), masked); | |
5529 | } | |
5530 | ||
6ed071f0 LP |
5531 | static unsigned emulator_get_hflags(struct x86_emulate_ctxt *ctxt) |
5532 | { | |
5533 | return emul_to_vcpu(ctxt)->arch.hflags; | |
5534 | } | |
5535 | ||
5536 | static void emulator_set_hflags(struct x86_emulate_ctxt *ctxt, unsigned emul_flags) | |
5537 | { | |
5538 | kvm_set_hflags(emul_to_vcpu(ctxt), emul_flags); | |
5539 | } | |
5540 | ||
0234bf88 LP |
5541 | static int emulator_pre_leave_smm(struct x86_emulate_ctxt *ctxt, u64 smbase) |
5542 | { | |
5543 | return kvm_x86_ops->pre_leave_smm(emul_to_vcpu(ctxt), smbase); | |
5544 | } | |
5545 | ||
0225fb50 | 5546 | static const struct x86_emulate_ops emulate_ops = { |
dd856efa AK |
5547 | .read_gpr = emulator_read_gpr, |
5548 | .write_gpr = emulator_write_gpr, | |
1871c602 | 5549 | .read_std = kvm_read_guest_virt_system, |
2dafc6c2 | 5550 | .write_std = kvm_write_guest_virt_system, |
7a036a6f | 5551 | .read_phys = kvm_read_guest_phys_system, |
1871c602 | 5552 | .fetch = kvm_fetch_guest_virt, |
bbd9b64e CO |
5553 | .read_emulated = emulator_read_emulated, |
5554 | .write_emulated = emulator_write_emulated, | |
5555 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
3cb16fe7 | 5556 | .invlpg = emulator_invlpg, |
cf8f70bf GN |
5557 | .pio_in_emulated = emulator_pio_in_emulated, |
5558 | .pio_out_emulated = emulator_pio_out_emulated, | |
1aa36616 AK |
5559 | .get_segment = emulator_get_segment, |
5560 | .set_segment = emulator_set_segment, | |
5951c442 | 5561 | .get_cached_segment_base = emulator_get_cached_segment_base, |
2dafc6c2 | 5562 | .get_gdt = emulator_get_gdt, |
160ce1f1 | 5563 | .get_idt = emulator_get_idt, |
1ac9d0cf AK |
5564 | .set_gdt = emulator_set_gdt, |
5565 | .set_idt = emulator_set_idt, | |
52a46617 GN |
5566 | .get_cr = emulator_get_cr, |
5567 | .set_cr = emulator_set_cr, | |
9c537244 | 5568 | .cpl = emulator_get_cpl, |
35aa5375 GN |
5569 | .get_dr = emulator_get_dr, |
5570 | .set_dr = emulator_set_dr, | |
64d60670 PB |
5571 | .get_smbase = emulator_get_smbase, |
5572 | .set_smbase = emulator_set_smbase, | |
717746e3 AK |
5573 | .set_msr = emulator_set_msr, |
5574 | .get_msr = emulator_get_msr, | |
67f4d428 | 5575 | .check_pmc = emulator_check_pmc, |
222d21aa | 5576 | .read_pmc = emulator_read_pmc, |
6c3287f7 | 5577 | .halt = emulator_halt, |
bcaf5cc5 | 5578 | .wbinvd = emulator_wbinvd, |
d6aa1000 | 5579 | .fix_hypercall = emulator_fix_hypercall, |
c4f035c6 | 5580 | .intercept = emulator_intercept, |
bdb42f5a | 5581 | .get_cpuid = emulator_get_cpuid, |
801806d9 | 5582 | .set_nmi_mask = emulator_set_nmi_mask, |
6ed071f0 LP |
5583 | .get_hflags = emulator_get_hflags, |
5584 | .set_hflags = emulator_set_hflags, | |
0234bf88 | 5585 | .pre_leave_smm = emulator_pre_leave_smm, |
bbd9b64e CO |
5586 | }; |
5587 | ||
95cb2295 GN |
5588 | static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |
5589 | { | |
37ccdcbe | 5590 | u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu); |
95cb2295 GN |
5591 | /* |
5592 | * an sti; sti; sequence only disable interrupts for the first | |
5593 | * instruction. So, if the last instruction, be it emulated or | |
5594 | * not, left the system with the INT_STI flag enabled, it | |
5595 | * means that the last instruction is an sti. We should not | |
5596 | * leave the flag on in this case. The same goes for mov ss | |
5597 | */ | |
37ccdcbe PB |
5598 | if (int_shadow & mask) |
5599 | mask = 0; | |
6addfc42 | 5600 | if (unlikely(int_shadow || mask)) { |
95cb2295 | 5601 | kvm_x86_ops->set_interrupt_shadow(vcpu, mask); |
6addfc42 PB |
5602 | if (!mask) |
5603 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
5604 | } | |
95cb2295 GN |
5605 | } |
5606 | ||
ef54bcfe | 5607 | static bool inject_emulated_exception(struct kvm_vcpu *vcpu) |
54b8486f GN |
5608 | { |
5609 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; | |
da9cb575 | 5610 | if (ctxt->exception.vector == PF_VECTOR) |
ef54bcfe PB |
5611 | return kvm_propagate_fault(vcpu, &ctxt->exception); |
5612 | ||
5613 | if (ctxt->exception.error_code_valid) | |
da9cb575 AK |
5614 | kvm_queue_exception_e(vcpu, ctxt->exception.vector, |
5615 | ctxt->exception.error_code); | |
54b8486f | 5616 | else |
da9cb575 | 5617 | kvm_queue_exception(vcpu, ctxt->exception.vector); |
ef54bcfe | 5618 | return false; |
54b8486f GN |
5619 | } |
5620 | ||
8ec4722d MG |
5621 | static void init_emulate_ctxt(struct kvm_vcpu *vcpu) |
5622 | { | |
adf52235 | 5623 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d MG |
5624 | int cs_db, cs_l; |
5625 | ||
8ec4722d MG |
5626 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
5627 | ||
adf52235 | 5628 | ctxt->eflags = kvm_get_rflags(vcpu); |
c8401dda PB |
5629 | ctxt->tf = (ctxt->eflags & X86_EFLAGS_TF) != 0; |
5630 | ||
adf52235 TY |
5631 | ctxt->eip = kvm_rip_read(vcpu); |
5632 | ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : | |
5633 | (ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 : | |
42bf549f | 5634 | (cs_l && is_long_mode(vcpu)) ? X86EMUL_MODE_PROT64 : |
adf52235 TY |
5635 | cs_db ? X86EMUL_MODE_PROT32 : |
5636 | X86EMUL_MODE_PROT16; | |
a584539b | 5637 | BUILD_BUG_ON(HF_GUEST_MASK != X86EMUL_GUEST_MASK); |
64d60670 PB |
5638 | BUILD_BUG_ON(HF_SMM_MASK != X86EMUL_SMM_MASK); |
5639 | BUILD_BUG_ON(HF_SMM_INSIDE_NMI_MASK != X86EMUL_SMM_INSIDE_NMI_MASK); | |
adf52235 | 5640 | |
dd856efa | 5641 | init_decode_cache(ctxt); |
7ae441ea | 5642 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; |
8ec4722d MG |
5643 | } |
5644 | ||
71f9833b | 5645 | int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip) |
63995653 | 5646 | { |
9d74191a | 5647 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
63995653 MG |
5648 | int ret; |
5649 | ||
5650 | init_emulate_ctxt(vcpu); | |
5651 | ||
9dac77fa AK |
5652 | ctxt->op_bytes = 2; |
5653 | ctxt->ad_bytes = 2; | |
5654 | ctxt->_eip = ctxt->eip + inc_eip; | |
9d74191a | 5655 | ret = emulate_int_real(ctxt, irq); |
63995653 MG |
5656 | |
5657 | if (ret != X86EMUL_CONTINUE) | |
5658 | return EMULATE_FAIL; | |
5659 | ||
9dac77fa | 5660 | ctxt->eip = ctxt->_eip; |
9d74191a TY |
5661 | kvm_rip_write(vcpu, ctxt->eip); |
5662 | kvm_set_rflags(vcpu, ctxt->eflags); | |
63995653 MG |
5663 | |
5664 | if (irq == NMI_VECTOR) | |
7460fb4a | 5665 | vcpu->arch.nmi_pending = 0; |
63995653 MG |
5666 | else |
5667 | vcpu->arch.interrupt.pending = false; | |
5668 | ||
5669 | return EMULATE_DONE; | |
5670 | } | |
5671 | EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt); | |
5672 | ||
6d77dbfc GN |
5673 | static int handle_emulation_failure(struct kvm_vcpu *vcpu) |
5674 | { | |
fc3a9157 JR |
5675 | int r = EMULATE_DONE; |
5676 | ||
6d77dbfc GN |
5677 | ++vcpu->stat.insn_emulation_fail; |
5678 | trace_kvm_emulate_insn_failed(vcpu); | |
a2b9e6c1 | 5679 | if (!is_guest_mode(vcpu) && kvm_x86_ops->get_cpl(vcpu) == 0) { |
fc3a9157 JR |
5680 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
5681 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
5682 | vcpu->run->internal.ndata = 0; | |
1f4dcb3b | 5683 | r = EMULATE_USER_EXIT; |
fc3a9157 | 5684 | } |
6d77dbfc | 5685 | kvm_queue_exception(vcpu, UD_VECTOR); |
fc3a9157 JR |
5686 | |
5687 | return r; | |
6d77dbfc GN |
5688 | } |
5689 | ||
93c05d3e | 5690 | static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2, |
991eebf9 GN |
5691 | bool write_fault_to_shadow_pgtable, |
5692 | int emulation_type) | |
a6f177ef | 5693 | { |
95b3cf69 | 5694 | gpa_t gpa = cr2; |
ba049e93 | 5695 | kvm_pfn_t pfn; |
a6f177ef | 5696 | |
991eebf9 GN |
5697 | if (emulation_type & EMULTYPE_NO_REEXECUTE) |
5698 | return false; | |
5699 | ||
95b3cf69 XG |
5700 | if (!vcpu->arch.mmu.direct_map) { |
5701 | /* | |
5702 | * Write permission should be allowed since only | |
5703 | * write access need to be emulated. | |
5704 | */ | |
5705 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
a6f177ef | 5706 | |
95b3cf69 XG |
5707 | /* |
5708 | * If the mapping is invalid in guest, let cpu retry | |
5709 | * it to generate fault. | |
5710 | */ | |
5711 | if (gpa == UNMAPPED_GVA) | |
5712 | return true; | |
5713 | } | |
a6f177ef | 5714 | |
8e3d9d06 XG |
5715 | /* |
5716 | * Do not retry the unhandleable instruction if it faults on the | |
5717 | * readonly host memory, otherwise it will goto a infinite loop: | |
5718 | * retry instruction -> write #PF -> emulation fail -> retry | |
5719 | * instruction -> ... | |
5720 | */ | |
5721 | pfn = gfn_to_pfn(vcpu->kvm, gpa_to_gfn(gpa)); | |
95b3cf69 XG |
5722 | |
5723 | /* | |
5724 | * If the instruction failed on the error pfn, it can not be fixed, | |
5725 | * report the error to userspace. | |
5726 | */ | |
5727 | if (is_error_noslot_pfn(pfn)) | |
5728 | return false; | |
5729 | ||
5730 | kvm_release_pfn_clean(pfn); | |
5731 | ||
5732 | /* The instructions are well-emulated on direct mmu. */ | |
5733 | if (vcpu->arch.mmu.direct_map) { | |
5734 | unsigned int indirect_shadow_pages; | |
5735 | ||
5736 | spin_lock(&vcpu->kvm->mmu_lock); | |
5737 | indirect_shadow_pages = vcpu->kvm->arch.indirect_shadow_pages; | |
5738 | spin_unlock(&vcpu->kvm->mmu_lock); | |
5739 | ||
5740 | if (indirect_shadow_pages) | |
5741 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
5742 | ||
a6f177ef | 5743 | return true; |
8e3d9d06 | 5744 | } |
a6f177ef | 5745 | |
95b3cf69 XG |
5746 | /* |
5747 | * if emulation was due to access to shadowed page table | |
5748 | * and it failed try to unshadow page and re-enter the | |
5749 | * guest to let CPU execute the instruction. | |
5750 | */ | |
5751 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
93c05d3e XG |
5752 | |
5753 | /* | |
5754 | * If the access faults on its page table, it can not | |
5755 | * be fixed by unprotecting shadow page and it should | |
5756 | * be reported to userspace. | |
5757 | */ | |
5758 | return !write_fault_to_shadow_pgtable; | |
a6f177ef GN |
5759 | } |
5760 | ||
1cb3f3ae XG |
5761 | static bool retry_instruction(struct x86_emulate_ctxt *ctxt, |
5762 | unsigned long cr2, int emulation_type) | |
5763 | { | |
5764 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5765 | unsigned long last_retry_eip, last_retry_addr, gpa = cr2; | |
5766 | ||
5767 | last_retry_eip = vcpu->arch.last_retry_eip; | |
5768 | last_retry_addr = vcpu->arch.last_retry_addr; | |
5769 | ||
5770 | /* | |
5771 | * If the emulation is caused by #PF and it is non-page_table | |
5772 | * writing instruction, it means the VM-EXIT is caused by shadow | |
5773 | * page protected, we can zap the shadow page and retry this | |
5774 | * instruction directly. | |
5775 | * | |
5776 | * Note: if the guest uses a non-page-table modifying instruction | |
5777 | * on the PDE that points to the instruction, then we will unmap | |
5778 | * the instruction and go to an infinite loop. So, we cache the | |
5779 | * last retried eip and the last fault address, if we meet the eip | |
5780 | * and the address again, we can break out of the potential infinite | |
5781 | * loop. | |
5782 | */ | |
5783 | vcpu->arch.last_retry_eip = vcpu->arch.last_retry_addr = 0; | |
5784 | ||
5785 | if (!(emulation_type & EMULTYPE_RETRY)) | |
5786 | return false; | |
5787 | ||
5788 | if (x86_page_table_writing_insn(ctxt)) | |
5789 | return false; | |
5790 | ||
5791 | if (ctxt->eip == last_retry_eip && last_retry_addr == cr2) | |
5792 | return false; | |
5793 | ||
5794 | vcpu->arch.last_retry_eip = ctxt->eip; | |
5795 | vcpu->arch.last_retry_addr = cr2; | |
5796 | ||
5797 | if (!vcpu->arch.mmu.direct_map) | |
5798 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
5799 | ||
22368028 | 5800 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); |
1cb3f3ae XG |
5801 | |
5802 | return true; | |
5803 | } | |
5804 | ||
716d51ab GN |
5805 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu); |
5806 | static int complete_emulated_pio(struct kvm_vcpu *vcpu); | |
5807 | ||
64d60670 | 5808 | static void kvm_smm_changed(struct kvm_vcpu *vcpu) |
a584539b | 5809 | { |
64d60670 | 5810 | if (!(vcpu->arch.hflags & HF_SMM_MASK)) { |
660a5d51 PB |
5811 | /* This is a good place to trace that we are exiting SMM. */ |
5812 | trace_kvm_enter_smm(vcpu->vcpu_id, vcpu->arch.smbase, false); | |
5813 | ||
c43203ca PB |
5814 | /* Process a latched INIT or SMI, if any. */ |
5815 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
64d60670 | 5816 | } |
699023e2 PB |
5817 | |
5818 | kvm_mmu_reset_context(vcpu); | |
64d60670 PB |
5819 | } |
5820 | ||
5821 | static void kvm_set_hflags(struct kvm_vcpu *vcpu, unsigned emul_flags) | |
5822 | { | |
5823 | unsigned changed = vcpu->arch.hflags ^ emul_flags; | |
5824 | ||
a584539b | 5825 | vcpu->arch.hflags = emul_flags; |
64d60670 PB |
5826 | |
5827 | if (changed & HF_SMM_MASK) | |
5828 | kvm_smm_changed(vcpu); | |
a584539b PB |
5829 | } |
5830 | ||
4a1e10d5 PB |
5831 | static int kvm_vcpu_check_hw_bp(unsigned long addr, u32 type, u32 dr7, |
5832 | unsigned long *db) | |
5833 | { | |
5834 | u32 dr6 = 0; | |
5835 | int i; | |
5836 | u32 enable, rwlen; | |
5837 | ||
5838 | enable = dr7; | |
5839 | rwlen = dr7 >> 16; | |
5840 | for (i = 0; i < 4; i++, enable >>= 2, rwlen >>= 4) | |
5841 | if ((enable & 3) && (rwlen & 15) == type && db[i] == addr) | |
5842 | dr6 |= (1 << i); | |
5843 | return dr6; | |
5844 | } | |
5845 | ||
c8401dda | 5846 | static void kvm_vcpu_do_singlestep(struct kvm_vcpu *vcpu, int *r) |
663f4c61 PB |
5847 | { |
5848 | struct kvm_run *kvm_run = vcpu->run; | |
5849 | ||
c8401dda PB |
5850 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) { |
5851 | kvm_run->debug.arch.dr6 = DR6_BS | DR6_FIXED_1 | DR6_RTM; | |
5852 | kvm_run->debug.arch.pc = vcpu->arch.singlestep_rip; | |
5853 | kvm_run->debug.arch.exception = DB_VECTOR; | |
5854 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
5855 | *r = EMULATE_USER_EXIT; | |
5856 | } else { | |
5857 | /* | |
5858 | * "Certain debug exceptions may clear bit 0-3. The | |
5859 | * remaining contents of the DR6 register are never | |
5860 | * cleared by the processor". | |
5861 | */ | |
5862 | vcpu->arch.dr6 &= ~15; | |
5863 | vcpu->arch.dr6 |= DR6_BS | DR6_RTM; | |
5864 | kvm_queue_exception(vcpu, DB_VECTOR); | |
663f4c61 PB |
5865 | } |
5866 | } | |
5867 | ||
6affcbed KH |
5868 | int kvm_skip_emulated_instruction(struct kvm_vcpu *vcpu) |
5869 | { | |
5870 | unsigned long rflags = kvm_x86_ops->get_rflags(vcpu); | |
5871 | int r = EMULATE_DONE; | |
5872 | ||
5873 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
c8401dda PB |
5874 | |
5875 | /* | |
5876 | * rflags is the old, "raw" value of the flags. The new value has | |
5877 | * not been saved yet. | |
5878 | * | |
5879 | * This is correct even for TF set by the guest, because "the | |
5880 | * processor will not generate this exception after the instruction | |
5881 | * that sets the TF flag". | |
5882 | */ | |
5883 | if (unlikely(rflags & X86_EFLAGS_TF)) | |
5884 | kvm_vcpu_do_singlestep(vcpu, &r); | |
6affcbed KH |
5885 | return r == EMULATE_DONE; |
5886 | } | |
5887 | EXPORT_SYMBOL_GPL(kvm_skip_emulated_instruction); | |
5888 | ||
4a1e10d5 PB |
5889 | static bool kvm_vcpu_check_breakpoint(struct kvm_vcpu *vcpu, int *r) |
5890 | { | |
4a1e10d5 PB |
5891 | if (unlikely(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) && |
5892 | (vcpu->arch.guest_debug_dr7 & DR7_BP_EN_MASK)) { | |
82b32774 NA |
5893 | struct kvm_run *kvm_run = vcpu->run; |
5894 | unsigned long eip = kvm_get_linear_rip(vcpu); | |
5895 | u32 dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
4a1e10d5 PB |
5896 | vcpu->arch.guest_debug_dr7, |
5897 | vcpu->arch.eff_db); | |
5898 | ||
5899 | if (dr6 != 0) { | |
6f43ed01 | 5900 | kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1 | DR6_RTM; |
82b32774 | 5901 | kvm_run->debug.arch.pc = eip; |
4a1e10d5 PB |
5902 | kvm_run->debug.arch.exception = DB_VECTOR; |
5903 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
5904 | *r = EMULATE_USER_EXIT; | |
5905 | return true; | |
5906 | } | |
5907 | } | |
5908 | ||
4161a569 NA |
5909 | if (unlikely(vcpu->arch.dr7 & DR7_BP_EN_MASK) && |
5910 | !(kvm_get_rflags(vcpu) & X86_EFLAGS_RF)) { | |
82b32774 NA |
5911 | unsigned long eip = kvm_get_linear_rip(vcpu); |
5912 | u32 dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
4a1e10d5 PB |
5913 | vcpu->arch.dr7, |
5914 | vcpu->arch.db); | |
5915 | ||
5916 | if (dr6 != 0) { | |
5917 | vcpu->arch.dr6 &= ~15; | |
6f43ed01 | 5918 | vcpu->arch.dr6 |= dr6 | DR6_RTM; |
4a1e10d5 PB |
5919 | kvm_queue_exception(vcpu, DB_VECTOR); |
5920 | *r = EMULATE_DONE; | |
5921 | return true; | |
5922 | } | |
5923 | } | |
5924 | ||
5925 | return false; | |
5926 | } | |
5927 | ||
51d8b661 AP |
5928 | int x86_emulate_instruction(struct kvm_vcpu *vcpu, |
5929 | unsigned long cr2, | |
dc25e89e AP |
5930 | int emulation_type, |
5931 | void *insn, | |
5932 | int insn_len) | |
bbd9b64e | 5933 | { |
95cb2295 | 5934 | int r; |
9d74191a | 5935 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
7ae441ea | 5936 | bool writeback = true; |
93c05d3e | 5937 | bool write_fault_to_spt = vcpu->arch.write_fault_to_shadow_pgtable; |
bbd9b64e | 5938 | |
93c05d3e XG |
5939 | /* |
5940 | * Clear write_fault_to_shadow_pgtable here to ensure it is | |
5941 | * never reused. | |
5942 | */ | |
5943 | vcpu->arch.write_fault_to_shadow_pgtable = false; | |
26eef70c | 5944 | kvm_clear_exception_queue(vcpu); |
8d7d8102 | 5945 | |
571008da | 5946 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
8ec4722d | 5947 | init_emulate_ctxt(vcpu); |
4a1e10d5 PB |
5948 | |
5949 | /* | |
5950 | * We will reenter on the same instruction since | |
5951 | * we do not set complete_userspace_io. This does not | |
5952 | * handle watchpoints yet, those would be handled in | |
5953 | * the emulate_ops. | |
5954 | */ | |
d391f120 VK |
5955 | if (!(emulation_type & EMULTYPE_SKIP) && |
5956 | kvm_vcpu_check_breakpoint(vcpu, &r)) | |
4a1e10d5 PB |
5957 | return r; |
5958 | ||
9d74191a TY |
5959 | ctxt->interruptibility = 0; |
5960 | ctxt->have_exception = false; | |
e0ad0b47 | 5961 | ctxt->exception.vector = -1; |
9d74191a | 5962 | ctxt->perm_ok = false; |
bbd9b64e | 5963 | |
b51e974f | 5964 | ctxt->ud = emulation_type & EMULTYPE_TRAP_UD; |
4005996e | 5965 | |
9d74191a | 5966 | r = x86_decode_insn(ctxt, insn, insn_len); |
bbd9b64e | 5967 | |
e46479f8 | 5968 | trace_kvm_emulate_insn_start(vcpu); |
f2b5756b | 5969 | ++vcpu->stat.insn_emulation; |
1d2887e2 | 5970 | if (r != EMULATION_OK) { |
4005996e AK |
5971 | if (emulation_type & EMULTYPE_TRAP_UD) |
5972 | return EMULATE_FAIL; | |
991eebf9 GN |
5973 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
5974 | emulation_type)) | |
bbd9b64e | 5975 | return EMULATE_DONE; |
6ea6e843 PB |
5976 | if (ctxt->have_exception && inject_emulated_exception(vcpu)) |
5977 | return EMULATE_DONE; | |
6d77dbfc GN |
5978 | if (emulation_type & EMULTYPE_SKIP) |
5979 | return EMULATE_FAIL; | |
5980 | return handle_emulation_failure(vcpu); | |
bbd9b64e CO |
5981 | } |
5982 | } | |
5983 | ||
ba8afb6b | 5984 | if (emulation_type & EMULTYPE_SKIP) { |
9dac77fa | 5985 | kvm_rip_write(vcpu, ctxt->_eip); |
bb663c7a NA |
5986 | if (ctxt->eflags & X86_EFLAGS_RF) |
5987 | kvm_set_rflags(vcpu, ctxt->eflags & ~X86_EFLAGS_RF); | |
ba8afb6b GN |
5988 | return EMULATE_DONE; |
5989 | } | |
5990 | ||
1cb3f3ae XG |
5991 | if (retry_instruction(ctxt, cr2, emulation_type)) |
5992 | return EMULATE_DONE; | |
5993 | ||
7ae441ea | 5994 | /* this is needed for vmware backdoor interface to work since it |
4d2179e1 | 5995 | changes registers values during IO operation */ |
7ae441ea GN |
5996 | if (vcpu->arch.emulate_regs_need_sync_from_vcpu) { |
5997 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; | |
dd856efa | 5998 | emulator_invalidate_register_cache(ctxt); |
7ae441ea | 5999 | } |
4d2179e1 | 6000 | |
5cd21917 | 6001 | restart: |
0f89b207 TL |
6002 | /* Save the faulting GPA (cr2) in the address field */ |
6003 | ctxt->exception.address = cr2; | |
6004 | ||
9d74191a | 6005 | r = x86_emulate_insn(ctxt); |
bbd9b64e | 6006 | |
775fde86 JR |
6007 | if (r == EMULATION_INTERCEPTED) |
6008 | return EMULATE_DONE; | |
6009 | ||
d2ddd1c4 | 6010 | if (r == EMULATION_FAILED) { |
991eebf9 GN |
6011 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
6012 | emulation_type)) | |
c3cd7ffa GN |
6013 | return EMULATE_DONE; |
6014 | ||
6d77dbfc | 6015 | return handle_emulation_failure(vcpu); |
bbd9b64e CO |
6016 | } |
6017 | ||
9d74191a | 6018 | if (ctxt->have_exception) { |
d2ddd1c4 | 6019 | r = EMULATE_DONE; |
ef54bcfe PB |
6020 | if (inject_emulated_exception(vcpu)) |
6021 | return r; | |
d2ddd1c4 | 6022 | } else if (vcpu->arch.pio.count) { |
0912c977 PB |
6023 | if (!vcpu->arch.pio.in) { |
6024 | /* FIXME: return into emulator if single-stepping. */ | |
3457e419 | 6025 | vcpu->arch.pio.count = 0; |
0912c977 | 6026 | } else { |
7ae441ea | 6027 | writeback = false; |
716d51ab GN |
6028 | vcpu->arch.complete_userspace_io = complete_emulated_pio; |
6029 | } | |
ac0a48c3 | 6030 | r = EMULATE_USER_EXIT; |
7ae441ea GN |
6031 | } else if (vcpu->mmio_needed) { |
6032 | if (!vcpu->mmio_is_write) | |
6033 | writeback = false; | |
ac0a48c3 | 6034 | r = EMULATE_USER_EXIT; |
716d51ab | 6035 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; |
7ae441ea | 6036 | } else if (r == EMULATION_RESTART) |
5cd21917 | 6037 | goto restart; |
d2ddd1c4 GN |
6038 | else |
6039 | r = EMULATE_DONE; | |
f850e2e6 | 6040 | |
7ae441ea | 6041 | if (writeback) { |
6addfc42 | 6042 | unsigned long rflags = kvm_x86_ops->get_rflags(vcpu); |
9d74191a | 6043 | toggle_interruptibility(vcpu, ctxt->interruptibility); |
7ae441ea | 6044 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
9d74191a | 6045 | kvm_rip_write(vcpu, ctxt->eip); |
c8401dda PB |
6046 | if (r == EMULATE_DONE && |
6047 | (ctxt->tf || (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP))) | |
6048 | kvm_vcpu_do_singlestep(vcpu, &r); | |
38827dbd NA |
6049 | if (!ctxt->have_exception || |
6050 | exception_type(ctxt->exception.vector) == EXCPT_TRAP) | |
6051 | __kvm_set_rflags(vcpu, ctxt->eflags); | |
6addfc42 PB |
6052 | |
6053 | /* | |
6054 | * For STI, interrupts are shadowed; so KVM_REQ_EVENT will | |
6055 | * do nothing, and it will be requested again as soon as | |
6056 | * the shadow expires. But we still need to check here, | |
6057 | * because POPF has no interrupt shadow. | |
6058 | */ | |
6059 | if (unlikely((ctxt->eflags & ~rflags) & X86_EFLAGS_IF)) | |
6060 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
7ae441ea GN |
6061 | } else |
6062 | vcpu->arch.emulate_regs_need_sync_to_vcpu = true; | |
e85d28f8 GN |
6063 | |
6064 | return r; | |
de7d789a | 6065 | } |
51d8b661 | 6066 | EXPORT_SYMBOL_GPL(x86_emulate_instruction); |
de7d789a | 6067 | |
dca7f128 SC |
6068 | static int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, |
6069 | unsigned short port) | |
de7d789a | 6070 | { |
cf8f70bf | 6071 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
ca1d4a9e AK |
6072 | int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt, |
6073 | size, port, &val, 1); | |
cf8f70bf | 6074 | /* do not return to emulator after return from userspace */ |
7972995b | 6075 | vcpu->arch.pio.count = 0; |
de7d789a CO |
6076 | return ret; |
6077 | } | |
de7d789a | 6078 | |
8370c3d0 TL |
6079 | static int complete_fast_pio_in(struct kvm_vcpu *vcpu) |
6080 | { | |
6081 | unsigned long val; | |
6082 | ||
6083 | /* We should only ever be called with arch.pio.count equal to 1 */ | |
6084 | BUG_ON(vcpu->arch.pio.count != 1); | |
6085 | ||
6086 | /* For size less than 4 we merge, else we zero extend */ | |
6087 | val = (vcpu->arch.pio.size < 4) ? kvm_register_read(vcpu, VCPU_REGS_RAX) | |
6088 | : 0; | |
6089 | ||
6090 | /* | |
6091 | * Since vcpu->arch.pio.count == 1 let emulator_pio_in_emulated perform | |
6092 | * the copy and tracing | |
6093 | */ | |
6094 | emulator_pio_in_emulated(&vcpu->arch.emulate_ctxt, vcpu->arch.pio.size, | |
6095 | vcpu->arch.pio.port, &val, 1); | |
6096 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); | |
6097 | ||
6098 | return 1; | |
6099 | } | |
6100 | ||
dca7f128 SC |
6101 | static int kvm_fast_pio_in(struct kvm_vcpu *vcpu, int size, |
6102 | unsigned short port) | |
8370c3d0 TL |
6103 | { |
6104 | unsigned long val; | |
6105 | int ret; | |
6106 | ||
6107 | /* For size less than 4 we merge, else we zero extend */ | |
6108 | val = (size < 4) ? kvm_register_read(vcpu, VCPU_REGS_RAX) : 0; | |
6109 | ||
6110 | ret = emulator_pio_in_emulated(&vcpu->arch.emulate_ctxt, size, port, | |
6111 | &val, 1); | |
6112 | if (ret) { | |
6113 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); | |
6114 | return ret; | |
6115 | } | |
6116 | ||
6117 | vcpu->arch.complete_userspace_io = complete_fast_pio_in; | |
6118 | ||
6119 | return 0; | |
6120 | } | |
dca7f128 SC |
6121 | |
6122 | int kvm_fast_pio(struct kvm_vcpu *vcpu, int size, unsigned short port, int in) | |
6123 | { | |
6124 | int ret = kvm_skip_emulated_instruction(vcpu); | |
6125 | ||
6126 | /* | |
6127 | * TODO: we might be squashing a KVM_GUESTDBG_SINGLESTEP-triggered | |
6128 | * KVM_EXIT_DEBUG here. | |
6129 | */ | |
6130 | if (in) | |
6131 | return kvm_fast_pio_in(vcpu, size, port) && ret; | |
6132 | else | |
6133 | return kvm_fast_pio_out(vcpu, size, port) && ret; | |
6134 | } | |
6135 | EXPORT_SYMBOL_GPL(kvm_fast_pio); | |
8370c3d0 | 6136 | |
251a5fd6 | 6137 | static int kvmclock_cpu_down_prep(unsigned int cpu) |
8cfdc000 | 6138 | { |
0a3aee0d | 6139 | __this_cpu_write(cpu_tsc_khz, 0); |
251a5fd6 | 6140 | return 0; |
8cfdc000 ZA |
6141 | } |
6142 | ||
6143 | static void tsc_khz_changed(void *data) | |
c8076604 | 6144 | { |
8cfdc000 ZA |
6145 | struct cpufreq_freqs *freq = data; |
6146 | unsigned long khz = 0; | |
6147 | ||
6148 | if (data) | |
6149 | khz = freq->new; | |
6150 | else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) | |
6151 | khz = cpufreq_quick_get(raw_smp_processor_id()); | |
6152 | if (!khz) | |
6153 | khz = tsc_khz; | |
0a3aee0d | 6154 | __this_cpu_write(cpu_tsc_khz, khz); |
c8076604 GH |
6155 | } |
6156 | ||
5fa4ec9c | 6157 | #ifdef CONFIG_X86_64 |
0092e434 VK |
6158 | static void kvm_hyperv_tsc_notifier(void) |
6159 | { | |
0092e434 VK |
6160 | struct kvm *kvm; |
6161 | struct kvm_vcpu *vcpu; | |
6162 | int cpu; | |
6163 | ||
6164 | spin_lock(&kvm_lock); | |
6165 | list_for_each_entry(kvm, &vm_list, vm_list) | |
6166 | kvm_make_mclock_inprogress_request(kvm); | |
6167 | ||
6168 | hyperv_stop_tsc_emulation(); | |
6169 | ||
6170 | /* TSC frequency always matches when on Hyper-V */ | |
6171 | for_each_present_cpu(cpu) | |
6172 | per_cpu(cpu_tsc_khz, cpu) = tsc_khz; | |
6173 | kvm_max_guest_tsc_khz = tsc_khz; | |
6174 | ||
6175 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
6176 | struct kvm_arch *ka = &kvm->arch; | |
6177 | ||
6178 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
6179 | ||
6180 | pvclock_update_vm_gtod_copy(kvm); | |
6181 | ||
6182 | kvm_for_each_vcpu(cpu, vcpu, kvm) | |
6183 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); | |
6184 | ||
6185 | kvm_for_each_vcpu(cpu, vcpu, kvm) | |
6186 | kvm_clear_request(KVM_REQ_MCLOCK_INPROGRESS, vcpu); | |
6187 | ||
6188 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
6189 | } | |
6190 | spin_unlock(&kvm_lock); | |
0092e434 | 6191 | } |
5fa4ec9c | 6192 | #endif |
0092e434 | 6193 | |
c8076604 GH |
6194 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
6195 | void *data) | |
6196 | { | |
6197 | struct cpufreq_freqs *freq = data; | |
6198 | struct kvm *kvm; | |
6199 | struct kvm_vcpu *vcpu; | |
6200 | int i, send_ipi = 0; | |
6201 | ||
8cfdc000 ZA |
6202 | /* |
6203 | * We allow guests to temporarily run on slowing clocks, | |
6204 | * provided we notify them after, or to run on accelerating | |
6205 | * clocks, provided we notify them before. Thus time never | |
6206 | * goes backwards. | |
6207 | * | |
6208 | * However, we have a problem. We can't atomically update | |
6209 | * the frequency of a given CPU from this function; it is | |
6210 | * merely a notifier, which can be called from any CPU. | |
6211 | * Changing the TSC frequency at arbitrary points in time | |
6212 | * requires a recomputation of local variables related to | |
6213 | * the TSC for each VCPU. We must flag these local variables | |
6214 | * to be updated and be sure the update takes place with the | |
6215 | * new frequency before any guests proceed. | |
6216 | * | |
6217 | * Unfortunately, the combination of hotplug CPU and frequency | |
6218 | * change creates an intractable locking scenario; the order | |
6219 | * of when these callouts happen is undefined with respect to | |
6220 | * CPU hotplug, and they can race with each other. As such, | |
6221 | * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is | |
6222 | * undefined; you can actually have a CPU frequency change take | |
6223 | * place in between the computation of X and the setting of the | |
6224 | * variable. To protect against this problem, all updates of | |
6225 | * the per_cpu tsc_khz variable are done in an interrupt | |
6226 | * protected IPI, and all callers wishing to update the value | |
6227 | * must wait for a synchronous IPI to complete (which is trivial | |
6228 | * if the caller is on the CPU already). This establishes the | |
6229 | * necessary total order on variable updates. | |
6230 | * | |
6231 | * Note that because a guest time update may take place | |
6232 | * anytime after the setting of the VCPU's request bit, the | |
6233 | * correct TSC value must be set before the request. However, | |
6234 | * to ensure the update actually makes it to any guest which | |
6235 | * starts running in hardware virtualization between the set | |
6236 | * and the acquisition of the spinlock, we must also ping the | |
6237 | * CPU after setting the request bit. | |
6238 | * | |
6239 | */ | |
6240 | ||
c8076604 GH |
6241 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
6242 | return 0; | |
6243 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
6244 | return 0; | |
8cfdc000 ZA |
6245 | |
6246 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); | |
c8076604 | 6247 | |
2f303b74 | 6248 | spin_lock(&kvm_lock); |
c8076604 | 6249 | list_for_each_entry(kvm, &vm_list, vm_list) { |
988a2cae | 6250 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
6251 | if (vcpu->cpu != freq->cpu) |
6252 | continue; | |
c285545f | 6253 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
c8076604 | 6254 | if (vcpu->cpu != smp_processor_id()) |
8cfdc000 | 6255 | send_ipi = 1; |
c8076604 GH |
6256 | } |
6257 | } | |
2f303b74 | 6258 | spin_unlock(&kvm_lock); |
c8076604 GH |
6259 | |
6260 | if (freq->old < freq->new && send_ipi) { | |
6261 | /* | |
6262 | * We upscale the frequency. Must make the guest | |
6263 | * doesn't see old kvmclock values while running with | |
6264 | * the new frequency, otherwise we risk the guest sees | |
6265 | * time go backwards. | |
6266 | * | |
6267 | * In case we update the frequency for another cpu | |
6268 | * (which might be in guest context) send an interrupt | |
6269 | * to kick the cpu out of guest context. Next time | |
6270 | * guest context is entered kvmclock will be updated, | |
6271 | * so the guest will not see stale values. | |
6272 | */ | |
8cfdc000 | 6273 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); |
c8076604 GH |
6274 | } |
6275 | return 0; | |
6276 | } | |
6277 | ||
6278 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
8cfdc000 ZA |
6279 | .notifier_call = kvmclock_cpufreq_notifier |
6280 | }; | |
6281 | ||
251a5fd6 | 6282 | static int kvmclock_cpu_online(unsigned int cpu) |
8cfdc000 | 6283 | { |
251a5fd6 SAS |
6284 | tsc_khz_changed(NULL); |
6285 | return 0; | |
8cfdc000 ZA |
6286 | } |
6287 | ||
b820cc0c ZA |
6288 | static void kvm_timer_init(void) |
6289 | { | |
c285545f | 6290 | max_tsc_khz = tsc_khz; |
460dd42e | 6291 | |
b820cc0c | 6292 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
c285545f ZA |
6293 | #ifdef CONFIG_CPU_FREQ |
6294 | struct cpufreq_policy policy; | |
758f588d BP |
6295 | int cpu; |
6296 | ||
c285545f | 6297 | memset(&policy, 0, sizeof(policy)); |
3e26f230 AK |
6298 | cpu = get_cpu(); |
6299 | cpufreq_get_policy(&policy, cpu); | |
c285545f ZA |
6300 | if (policy.cpuinfo.max_freq) |
6301 | max_tsc_khz = policy.cpuinfo.max_freq; | |
3e26f230 | 6302 | put_cpu(); |
c285545f | 6303 | #endif |
b820cc0c ZA |
6304 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
6305 | CPUFREQ_TRANSITION_NOTIFIER); | |
6306 | } | |
c285545f | 6307 | pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz); |
460dd42e | 6308 | |
73c1b41e | 6309 | cpuhp_setup_state(CPUHP_AP_X86_KVM_CLK_ONLINE, "x86/kvm/clk:online", |
251a5fd6 | 6310 | kvmclock_cpu_online, kvmclock_cpu_down_prep); |
b820cc0c ZA |
6311 | } |
6312 | ||
ff9d07a0 ZY |
6313 | static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
6314 | ||
f5132b01 | 6315 | int kvm_is_in_guest(void) |
ff9d07a0 | 6316 | { |
086c9855 | 6317 | return __this_cpu_read(current_vcpu) != NULL; |
ff9d07a0 ZY |
6318 | } |
6319 | ||
6320 | static int kvm_is_user_mode(void) | |
6321 | { | |
6322 | int user_mode = 3; | |
dcf46b94 | 6323 | |
086c9855 AS |
6324 | if (__this_cpu_read(current_vcpu)) |
6325 | user_mode = kvm_x86_ops->get_cpl(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 6326 | |
ff9d07a0 ZY |
6327 | return user_mode != 0; |
6328 | } | |
6329 | ||
6330 | static unsigned long kvm_get_guest_ip(void) | |
6331 | { | |
6332 | unsigned long ip = 0; | |
dcf46b94 | 6333 | |
086c9855 AS |
6334 | if (__this_cpu_read(current_vcpu)) |
6335 | ip = kvm_rip_read(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 6336 | |
ff9d07a0 ZY |
6337 | return ip; |
6338 | } | |
6339 | ||
6340 | static struct perf_guest_info_callbacks kvm_guest_cbs = { | |
6341 | .is_in_guest = kvm_is_in_guest, | |
6342 | .is_user_mode = kvm_is_user_mode, | |
6343 | .get_guest_ip = kvm_get_guest_ip, | |
6344 | }; | |
6345 | ||
6346 | void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) | |
6347 | { | |
086c9855 | 6348 | __this_cpu_write(current_vcpu, vcpu); |
ff9d07a0 ZY |
6349 | } |
6350 | EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); | |
6351 | ||
6352 | void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) | |
6353 | { | |
086c9855 | 6354 | __this_cpu_write(current_vcpu, NULL); |
ff9d07a0 ZY |
6355 | } |
6356 | EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); | |
6357 | ||
ce88decf XG |
6358 | static void kvm_set_mmio_spte_mask(void) |
6359 | { | |
6360 | u64 mask; | |
6361 | int maxphyaddr = boot_cpu_data.x86_phys_bits; | |
6362 | ||
6363 | /* | |
6364 | * Set the reserved bits and the present bit of an paging-structure | |
6365 | * entry to generate page fault with PFER.RSV = 1. | |
6366 | */ | |
885032b9 | 6367 | /* Mask the reserved physical address bits. */ |
d1431483 | 6368 | mask = rsvd_bits(maxphyaddr, 51); |
885032b9 | 6369 | |
885032b9 | 6370 | /* Set the present bit. */ |
ce88decf XG |
6371 | mask |= 1ull; |
6372 | ||
6373 | #ifdef CONFIG_X86_64 | |
6374 | /* | |
6375 | * If reserved bit is not supported, clear the present bit to disable | |
6376 | * mmio page fault. | |
6377 | */ | |
6378 | if (maxphyaddr == 52) | |
6379 | mask &= ~1ull; | |
6380 | #endif | |
6381 | ||
dcdca5fe | 6382 | kvm_mmu_set_mmio_spte_mask(mask, mask); |
ce88decf XG |
6383 | } |
6384 | ||
16e8d74d MT |
6385 | #ifdef CONFIG_X86_64 |
6386 | static void pvclock_gtod_update_fn(struct work_struct *work) | |
6387 | { | |
d828199e MT |
6388 | struct kvm *kvm; |
6389 | ||
6390 | struct kvm_vcpu *vcpu; | |
6391 | int i; | |
6392 | ||
2f303b74 | 6393 | spin_lock(&kvm_lock); |
d828199e MT |
6394 | list_for_each_entry(kvm, &vm_list, vm_list) |
6395 | kvm_for_each_vcpu(i, vcpu, kvm) | |
105b21bb | 6396 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
d828199e | 6397 | atomic_set(&kvm_guest_has_master_clock, 0); |
2f303b74 | 6398 | spin_unlock(&kvm_lock); |
16e8d74d MT |
6399 | } |
6400 | ||
6401 | static DECLARE_WORK(pvclock_gtod_work, pvclock_gtod_update_fn); | |
6402 | ||
6403 | /* | |
6404 | * Notification about pvclock gtod data update. | |
6405 | */ | |
6406 | static int pvclock_gtod_notify(struct notifier_block *nb, unsigned long unused, | |
6407 | void *priv) | |
6408 | { | |
6409 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
6410 | struct timekeeper *tk = priv; | |
6411 | ||
6412 | update_pvclock_gtod(tk); | |
6413 | ||
6414 | /* disable master clock if host does not trust, or does not | |
b0c39dc6 | 6415 | * use, TSC based clocksource. |
16e8d74d | 6416 | */ |
b0c39dc6 | 6417 | if (!gtod_is_based_on_tsc(gtod->clock.vclock_mode) && |
16e8d74d MT |
6418 | atomic_read(&kvm_guest_has_master_clock) != 0) |
6419 | queue_work(system_long_wq, &pvclock_gtod_work); | |
6420 | ||
6421 | return 0; | |
6422 | } | |
6423 | ||
6424 | static struct notifier_block pvclock_gtod_notifier = { | |
6425 | .notifier_call = pvclock_gtod_notify, | |
6426 | }; | |
6427 | #endif | |
6428 | ||
f8c16bba | 6429 | int kvm_arch_init(void *opaque) |
043405e1 | 6430 | { |
b820cc0c | 6431 | int r; |
6b61edf7 | 6432 | struct kvm_x86_ops *ops = opaque; |
f8c16bba | 6433 | |
f8c16bba ZX |
6434 | if (kvm_x86_ops) { |
6435 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
6436 | r = -EEXIST; |
6437 | goto out; | |
f8c16bba ZX |
6438 | } |
6439 | ||
6440 | if (!ops->cpu_has_kvm_support()) { | |
6441 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
6442 | r = -EOPNOTSUPP; |
6443 | goto out; | |
f8c16bba ZX |
6444 | } |
6445 | if (ops->disabled_by_bios()) { | |
6446 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
6447 | r = -EOPNOTSUPP; |
6448 | goto out; | |
f8c16bba ZX |
6449 | } |
6450 | ||
013f6a5d MT |
6451 | r = -ENOMEM; |
6452 | shared_msrs = alloc_percpu(struct kvm_shared_msrs); | |
6453 | if (!shared_msrs) { | |
6454 | printk(KERN_ERR "kvm: failed to allocate percpu kvm_shared_msrs\n"); | |
6455 | goto out; | |
6456 | } | |
6457 | ||
97db56ce AK |
6458 | r = kvm_mmu_module_init(); |
6459 | if (r) | |
013f6a5d | 6460 | goto out_free_percpu; |
97db56ce | 6461 | |
ce88decf | 6462 | kvm_set_mmio_spte_mask(); |
97db56ce | 6463 | |
f8c16bba | 6464 | kvm_x86_ops = ops; |
920c8377 | 6465 | |
7b52345e | 6466 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, |
ffb128c8 | 6467 | PT_DIRTY_MASK, PT64_NX_MASK, 0, |
d0ec49d4 | 6468 | PT_PRESENT_MASK, 0, sme_me_mask); |
b820cc0c | 6469 | kvm_timer_init(); |
c8076604 | 6470 | |
ff9d07a0 ZY |
6471 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
6472 | ||
d366bf7e | 6473 | if (boot_cpu_has(X86_FEATURE_XSAVE)) |
2acf923e DC |
6474 | host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); |
6475 | ||
c5cc421b | 6476 | kvm_lapic_init(); |
16e8d74d MT |
6477 | #ifdef CONFIG_X86_64 |
6478 | pvclock_gtod_register_notifier(&pvclock_gtod_notifier); | |
0092e434 | 6479 | |
5fa4ec9c | 6480 | if (hypervisor_is_type(X86_HYPER_MS_HYPERV)) |
0092e434 | 6481 | set_hv_tscchange_cb(kvm_hyperv_tsc_notifier); |
16e8d74d MT |
6482 | #endif |
6483 | ||
f8c16bba | 6484 | return 0; |
56c6d28a | 6485 | |
013f6a5d MT |
6486 | out_free_percpu: |
6487 | free_percpu(shared_msrs); | |
56c6d28a | 6488 | out: |
56c6d28a | 6489 | return r; |
043405e1 | 6490 | } |
8776e519 | 6491 | |
f8c16bba ZX |
6492 | void kvm_arch_exit(void) |
6493 | { | |
0092e434 | 6494 | #ifdef CONFIG_X86_64 |
5fa4ec9c | 6495 | if (hypervisor_is_type(X86_HYPER_MS_HYPERV)) |
0092e434 VK |
6496 | clear_hv_tscchange_cb(); |
6497 | #endif | |
cef84c30 | 6498 | kvm_lapic_exit(); |
ff9d07a0 ZY |
6499 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
6500 | ||
888d256e JK |
6501 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
6502 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
6503 | CPUFREQ_TRANSITION_NOTIFIER); | |
251a5fd6 | 6504 | cpuhp_remove_state_nocalls(CPUHP_AP_X86_KVM_CLK_ONLINE); |
16e8d74d MT |
6505 | #ifdef CONFIG_X86_64 |
6506 | pvclock_gtod_unregister_notifier(&pvclock_gtod_notifier); | |
6507 | #endif | |
f8c16bba | 6508 | kvm_x86_ops = NULL; |
56c6d28a | 6509 | kvm_mmu_module_exit(); |
013f6a5d | 6510 | free_percpu(shared_msrs); |
56c6d28a | 6511 | } |
f8c16bba | 6512 | |
5cb56059 | 6513 | int kvm_vcpu_halt(struct kvm_vcpu *vcpu) |
8776e519 HB |
6514 | { |
6515 | ++vcpu->stat.halt_exits; | |
35754c98 | 6516 | if (lapic_in_kernel(vcpu)) { |
a4535290 | 6517 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
6518 | return 1; |
6519 | } else { | |
6520 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
6521 | return 0; | |
6522 | } | |
6523 | } | |
5cb56059 JS |
6524 | EXPORT_SYMBOL_GPL(kvm_vcpu_halt); |
6525 | ||
6526 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) | |
6527 | { | |
6affcbed KH |
6528 | int ret = kvm_skip_emulated_instruction(vcpu); |
6529 | /* | |
6530 | * TODO: we might be squashing a GUESTDBG_SINGLESTEP-triggered | |
6531 | * KVM_EXIT_DEBUG here. | |
6532 | */ | |
6533 | return kvm_vcpu_halt(vcpu) && ret; | |
5cb56059 | 6534 | } |
8776e519 HB |
6535 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); |
6536 | ||
8ef81a9a | 6537 | #ifdef CONFIG_X86_64 |
55dd00a7 MT |
6538 | static int kvm_pv_clock_pairing(struct kvm_vcpu *vcpu, gpa_t paddr, |
6539 | unsigned long clock_type) | |
6540 | { | |
6541 | struct kvm_clock_pairing clock_pairing; | |
6542 | struct timespec ts; | |
80fbd89c | 6543 | u64 cycle; |
55dd00a7 MT |
6544 | int ret; |
6545 | ||
6546 | if (clock_type != KVM_CLOCK_PAIRING_WALLCLOCK) | |
6547 | return -KVM_EOPNOTSUPP; | |
6548 | ||
6549 | if (kvm_get_walltime_and_clockread(&ts, &cycle) == false) | |
6550 | return -KVM_EOPNOTSUPP; | |
6551 | ||
6552 | clock_pairing.sec = ts.tv_sec; | |
6553 | clock_pairing.nsec = ts.tv_nsec; | |
6554 | clock_pairing.tsc = kvm_read_l1_tsc(vcpu, cycle); | |
6555 | clock_pairing.flags = 0; | |
6556 | ||
6557 | ret = 0; | |
6558 | if (kvm_write_guest(vcpu->kvm, paddr, &clock_pairing, | |
6559 | sizeof(struct kvm_clock_pairing))) | |
6560 | ret = -KVM_EFAULT; | |
6561 | ||
6562 | return ret; | |
6563 | } | |
8ef81a9a | 6564 | #endif |
55dd00a7 | 6565 | |
6aef266c SV |
6566 | /* |
6567 | * kvm_pv_kick_cpu_op: Kick a vcpu. | |
6568 | * | |
6569 | * @apicid - apicid of vcpu to be kicked. | |
6570 | */ | |
6571 | static void kvm_pv_kick_cpu_op(struct kvm *kvm, unsigned long flags, int apicid) | |
6572 | { | |
24d2166b | 6573 | struct kvm_lapic_irq lapic_irq; |
6aef266c | 6574 | |
24d2166b R |
6575 | lapic_irq.shorthand = 0; |
6576 | lapic_irq.dest_mode = 0; | |
ebd28fcb | 6577 | lapic_irq.level = 0; |
24d2166b | 6578 | lapic_irq.dest_id = apicid; |
93bbf0b8 | 6579 | lapic_irq.msi_redir_hint = false; |
6aef266c | 6580 | |
24d2166b | 6581 | lapic_irq.delivery_mode = APIC_DM_REMRD; |
795a149e | 6582 | kvm_irq_delivery_to_apic(kvm, NULL, &lapic_irq, NULL); |
6aef266c SV |
6583 | } |
6584 | ||
d62caabb AS |
6585 | void kvm_vcpu_deactivate_apicv(struct kvm_vcpu *vcpu) |
6586 | { | |
6587 | vcpu->arch.apicv_active = false; | |
6588 | kvm_x86_ops->refresh_apicv_exec_ctrl(vcpu); | |
6589 | } | |
6590 | ||
8776e519 HB |
6591 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
6592 | { | |
6593 | unsigned long nr, a0, a1, a2, a3, ret; | |
6affcbed | 6594 | int op_64_bit, r; |
8776e519 | 6595 | |
6affcbed | 6596 | r = kvm_skip_emulated_instruction(vcpu); |
5cb56059 | 6597 | |
55cd8e5a GN |
6598 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
6599 | return kvm_hv_hypercall(vcpu); | |
6600 | ||
5fdbf976 MT |
6601 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
6602 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
6603 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
6604 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
6605 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 6606 | |
229456fc | 6607 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 6608 | |
a449c7aa NA |
6609 | op_64_bit = is_64_bit_mode(vcpu); |
6610 | if (!op_64_bit) { | |
8776e519 HB |
6611 | nr &= 0xFFFFFFFF; |
6612 | a0 &= 0xFFFFFFFF; | |
6613 | a1 &= 0xFFFFFFFF; | |
6614 | a2 &= 0xFFFFFFFF; | |
6615 | a3 &= 0xFFFFFFFF; | |
6616 | } | |
6617 | ||
07708c4a JK |
6618 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
6619 | ret = -KVM_EPERM; | |
6620 | goto out; | |
6621 | } | |
6622 | ||
8776e519 | 6623 | switch (nr) { |
b93463aa AK |
6624 | case KVM_HC_VAPIC_POLL_IRQ: |
6625 | ret = 0; | |
6626 | break; | |
6aef266c SV |
6627 | case KVM_HC_KICK_CPU: |
6628 | kvm_pv_kick_cpu_op(vcpu->kvm, a0, a1); | |
6629 | ret = 0; | |
6630 | break; | |
8ef81a9a | 6631 | #ifdef CONFIG_X86_64 |
55dd00a7 MT |
6632 | case KVM_HC_CLOCK_PAIRING: |
6633 | ret = kvm_pv_clock_pairing(vcpu, a0, a1); | |
6634 | break; | |
8ef81a9a | 6635 | #endif |
8776e519 HB |
6636 | default: |
6637 | ret = -KVM_ENOSYS; | |
6638 | break; | |
6639 | } | |
07708c4a | 6640 | out: |
a449c7aa NA |
6641 | if (!op_64_bit) |
6642 | ret = (u32)ret; | |
5fdbf976 | 6643 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 6644 | ++vcpu->stat.hypercalls; |
2f333bcb | 6645 | return r; |
8776e519 HB |
6646 | } |
6647 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
6648 | ||
b6785def | 6649 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) |
8776e519 | 6650 | { |
d6aa1000 | 6651 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
8776e519 | 6652 | char instruction[3]; |
5fdbf976 | 6653 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 6654 | |
8776e519 | 6655 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 6656 | |
ce2e852e DV |
6657 | return emulator_write_emulated(ctxt, rip, instruction, 3, |
6658 | &ctxt->exception); | |
8776e519 HB |
6659 | } |
6660 | ||
851ba692 | 6661 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 6662 | { |
782d422b MG |
6663 | return vcpu->run->request_interrupt_window && |
6664 | likely(!pic_in_kernel(vcpu->kvm)); | |
b6c7a5dc HB |
6665 | } |
6666 | ||
851ba692 | 6667 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 6668 | { |
851ba692 AK |
6669 | struct kvm_run *kvm_run = vcpu->run; |
6670 | ||
91586a3b | 6671 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
f077825a | 6672 | kvm_run->flags = is_smm(vcpu) ? KVM_RUN_X86_SMM : 0; |
2d3ad1f4 | 6673 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 6674 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
127a457a MG |
6675 | kvm_run->ready_for_interrupt_injection = |
6676 | pic_in_kernel(vcpu->kvm) || | |
782d422b | 6677 | kvm_vcpu_ready_for_interrupt_injection(vcpu); |
b6c7a5dc HB |
6678 | } |
6679 | ||
95ba8273 GN |
6680 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
6681 | { | |
6682 | int max_irr, tpr; | |
6683 | ||
6684 | if (!kvm_x86_ops->update_cr8_intercept) | |
6685 | return; | |
6686 | ||
bce87cce | 6687 | if (!lapic_in_kernel(vcpu)) |
88c808fd AK |
6688 | return; |
6689 | ||
d62caabb AS |
6690 | if (vcpu->arch.apicv_active) |
6691 | return; | |
6692 | ||
8db3baa2 GN |
6693 | if (!vcpu->arch.apic->vapic_addr) |
6694 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
6695 | else | |
6696 | max_irr = -1; | |
95ba8273 GN |
6697 | |
6698 | if (max_irr != -1) | |
6699 | max_irr >>= 4; | |
6700 | ||
6701 | tpr = kvm_lapic_get_cr8(vcpu); | |
6702 | ||
6703 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
6704 | } | |
6705 | ||
b6b8a145 | 6706 | static int inject_pending_event(struct kvm_vcpu *vcpu, bool req_int_win) |
95ba8273 | 6707 | { |
b6b8a145 JK |
6708 | int r; |
6709 | ||
95ba8273 | 6710 | /* try to reinject previous events if any */ |
664f8e26 WL |
6711 | if (vcpu->arch.exception.injected) { |
6712 | kvm_x86_ops->queue_exception(vcpu); | |
6713 | return 0; | |
6714 | } | |
6715 | ||
6716 | /* | |
6717 | * Exceptions must be injected immediately, or the exception | |
6718 | * frame will have the address of the NMI or interrupt handler. | |
6719 | */ | |
6720 | if (!vcpu->arch.exception.pending) { | |
6721 | if (vcpu->arch.nmi_injected) { | |
6722 | kvm_x86_ops->set_nmi(vcpu); | |
6723 | return 0; | |
6724 | } | |
6725 | ||
6726 | if (vcpu->arch.interrupt.pending) { | |
6727 | kvm_x86_ops->set_irq(vcpu); | |
6728 | return 0; | |
6729 | } | |
6730 | } | |
6731 | ||
6732 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { | |
6733 | r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); | |
6734 | if (r != 0) | |
6735 | return r; | |
6736 | } | |
6737 | ||
6738 | /* try to inject new event if pending */ | |
b59bb7bd | 6739 | if (vcpu->arch.exception.pending) { |
5c1c85d0 AK |
6740 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
6741 | vcpu->arch.exception.has_error_code, | |
6742 | vcpu->arch.exception.error_code); | |
d6e8c854 | 6743 | |
664f8e26 WL |
6744 | vcpu->arch.exception.pending = false; |
6745 | vcpu->arch.exception.injected = true; | |
6746 | ||
d6e8c854 NA |
6747 | if (exception_type(vcpu->arch.exception.nr) == EXCPT_FAULT) |
6748 | __kvm_set_rflags(vcpu, kvm_get_rflags(vcpu) | | |
6749 | X86_EFLAGS_RF); | |
6750 | ||
6bdf0662 NA |
6751 | if (vcpu->arch.exception.nr == DB_VECTOR && |
6752 | (vcpu->arch.dr7 & DR7_GD)) { | |
6753 | vcpu->arch.dr7 &= ~DR7_GD; | |
6754 | kvm_update_dr7(vcpu); | |
6755 | } | |
6756 | ||
cfcd20e5 | 6757 | kvm_x86_ops->queue_exception(vcpu); |
72d7b374 | 6758 | } else if (vcpu->arch.smi_pending && !is_smm(vcpu) && kvm_x86_ops->smi_allowed(vcpu)) { |
c43203ca | 6759 | vcpu->arch.smi_pending = false; |
52797bf9 | 6760 | ++vcpu->arch.smi_count; |
ee2cd4b7 | 6761 | enter_smm(vcpu); |
c43203ca | 6762 | } else if (vcpu->arch.nmi_pending && kvm_x86_ops->nmi_allowed(vcpu)) { |
321c5658 YS |
6763 | --vcpu->arch.nmi_pending; |
6764 | vcpu->arch.nmi_injected = true; | |
6765 | kvm_x86_ops->set_nmi(vcpu); | |
c7c9c56c | 6766 | } else if (kvm_cpu_has_injectable_intr(vcpu)) { |
9242b5b6 BD |
6767 | /* |
6768 | * Because interrupts can be injected asynchronously, we are | |
6769 | * calling check_nested_events again here to avoid a race condition. | |
6770 | * See https://lkml.org/lkml/2014/7/2/60 for discussion about this | |
6771 | * proposal and current concerns. Perhaps we should be setting | |
6772 | * KVM_REQ_EVENT only on certain events and not unconditionally? | |
6773 | */ | |
6774 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { | |
6775 | r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); | |
6776 | if (r != 0) | |
6777 | return r; | |
6778 | } | |
95ba8273 | 6779 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { |
66fd3f7f GN |
6780 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
6781 | false); | |
6782 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
6783 | } |
6784 | } | |
ee2cd4b7 | 6785 | |
b6b8a145 | 6786 | return 0; |
95ba8273 GN |
6787 | } |
6788 | ||
7460fb4a AK |
6789 | static void process_nmi(struct kvm_vcpu *vcpu) |
6790 | { | |
6791 | unsigned limit = 2; | |
6792 | ||
6793 | /* | |
6794 | * x86 is limited to one NMI running, and one NMI pending after it. | |
6795 | * If an NMI is already in progress, limit further NMIs to just one. | |
6796 | * Otherwise, allow two (and we'll inject the first one immediately). | |
6797 | */ | |
6798 | if (kvm_x86_ops->get_nmi_mask(vcpu) || vcpu->arch.nmi_injected) | |
6799 | limit = 1; | |
6800 | ||
6801 | vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0); | |
6802 | vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit); | |
6803 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
6804 | } | |
6805 | ||
ee2cd4b7 | 6806 | static u32 enter_smm_get_segment_flags(struct kvm_segment *seg) |
660a5d51 PB |
6807 | { |
6808 | u32 flags = 0; | |
6809 | flags |= seg->g << 23; | |
6810 | flags |= seg->db << 22; | |
6811 | flags |= seg->l << 21; | |
6812 | flags |= seg->avl << 20; | |
6813 | flags |= seg->present << 15; | |
6814 | flags |= seg->dpl << 13; | |
6815 | flags |= seg->s << 12; | |
6816 | flags |= seg->type << 8; | |
6817 | return flags; | |
6818 | } | |
6819 | ||
ee2cd4b7 | 6820 | static void enter_smm_save_seg_32(struct kvm_vcpu *vcpu, char *buf, int n) |
660a5d51 PB |
6821 | { |
6822 | struct kvm_segment seg; | |
6823 | int offset; | |
6824 | ||
6825 | kvm_get_segment(vcpu, &seg, n); | |
6826 | put_smstate(u32, buf, 0x7fa8 + n * 4, seg.selector); | |
6827 | ||
6828 | if (n < 3) | |
6829 | offset = 0x7f84 + n * 12; | |
6830 | else | |
6831 | offset = 0x7f2c + (n - 3) * 12; | |
6832 | ||
6833 | put_smstate(u32, buf, offset + 8, seg.base); | |
6834 | put_smstate(u32, buf, offset + 4, seg.limit); | |
ee2cd4b7 | 6835 | put_smstate(u32, buf, offset, enter_smm_get_segment_flags(&seg)); |
660a5d51 PB |
6836 | } |
6837 | ||
efbb288a | 6838 | #ifdef CONFIG_X86_64 |
ee2cd4b7 | 6839 | static void enter_smm_save_seg_64(struct kvm_vcpu *vcpu, char *buf, int n) |
660a5d51 PB |
6840 | { |
6841 | struct kvm_segment seg; | |
6842 | int offset; | |
6843 | u16 flags; | |
6844 | ||
6845 | kvm_get_segment(vcpu, &seg, n); | |
6846 | offset = 0x7e00 + n * 16; | |
6847 | ||
ee2cd4b7 | 6848 | flags = enter_smm_get_segment_flags(&seg) >> 8; |
660a5d51 PB |
6849 | put_smstate(u16, buf, offset, seg.selector); |
6850 | put_smstate(u16, buf, offset + 2, flags); | |
6851 | put_smstate(u32, buf, offset + 4, seg.limit); | |
6852 | put_smstate(u64, buf, offset + 8, seg.base); | |
6853 | } | |
efbb288a | 6854 | #endif |
660a5d51 | 6855 | |
ee2cd4b7 | 6856 | static void enter_smm_save_state_32(struct kvm_vcpu *vcpu, char *buf) |
660a5d51 PB |
6857 | { |
6858 | struct desc_ptr dt; | |
6859 | struct kvm_segment seg; | |
6860 | unsigned long val; | |
6861 | int i; | |
6862 | ||
6863 | put_smstate(u32, buf, 0x7ffc, kvm_read_cr0(vcpu)); | |
6864 | put_smstate(u32, buf, 0x7ff8, kvm_read_cr3(vcpu)); | |
6865 | put_smstate(u32, buf, 0x7ff4, kvm_get_rflags(vcpu)); | |
6866 | put_smstate(u32, buf, 0x7ff0, kvm_rip_read(vcpu)); | |
6867 | ||
6868 | for (i = 0; i < 8; i++) | |
6869 | put_smstate(u32, buf, 0x7fd0 + i * 4, kvm_register_read(vcpu, i)); | |
6870 | ||
6871 | kvm_get_dr(vcpu, 6, &val); | |
6872 | put_smstate(u32, buf, 0x7fcc, (u32)val); | |
6873 | kvm_get_dr(vcpu, 7, &val); | |
6874 | put_smstate(u32, buf, 0x7fc8, (u32)val); | |
6875 | ||
6876 | kvm_get_segment(vcpu, &seg, VCPU_SREG_TR); | |
6877 | put_smstate(u32, buf, 0x7fc4, seg.selector); | |
6878 | put_smstate(u32, buf, 0x7f64, seg.base); | |
6879 | put_smstate(u32, buf, 0x7f60, seg.limit); | |
ee2cd4b7 | 6880 | put_smstate(u32, buf, 0x7f5c, enter_smm_get_segment_flags(&seg)); |
660a5d51 PB |
6881 | |
6882 | kvm_get_segment(vcpu, &seg, VCPU_SREG_LDTR); | |
6883 | put_smstate(u32, buf, 0x7fc0, seg.selector); | |
6884 | put_smstate(u32, buf, 0x7f80, seg.base); | |
6885 | put_smstate(u32, buf, 0x7f7c, seg.limit); | |
ee2cd4b7 | 6886 | put_smstate(u32, buf, 0x7f78, enter_smm_get_segment_flags(&seg)); |
660a5d51 PB |
6887 | |
6888 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
6889 | put_smstate(u32, buf, 0x7f74, dt.address); | |
6890 | put_smstate(u32, buf, 0x7f70, dt.size); | |
6891 | ||
6892 | kvm_x86_ops->get_idt(vcpu, &dt); | |
6893 | put_smstate(u32, buf, 0x7f58, dt.address); | |
6894 | put_smstate(u32, buf, 0x7f54, dt.size); | |
6895 | ||
6896 | for (i = 0; i < 6; i++) | |
ee2cd4b7 | 6897 | enter_smm_save_seg_32(vcpu, buf, i); |
660a5d51 PB |
6898 | |
6899 | put_smstate(u32, buf, 0x7f14, kvm_read_cr4(vcpu)); | |
6900 | ||
6901 | /* revision id */ | |
6902 | put_smstate(u32, buf, 0x7efc, 0x00020000); | |
6903 | put_smstate(u32, buf, 0x7ef8, vcpu->arch.smbase); | |
6904 | } | |
6905 | ||
ee2cd4b7 | 6906 | static void enter_smm_save_state_64(struct kvm_vcpu *vcpu, char *buf) |
660a5d51 PB |
6907 | { |
6908 | #ifdef CONFIG_X86_64 | |
6909 | struct desc_ptr dt; | |
6910 | struct kvm_segment seg; | |
6911 | unsigned long val; | |
6912 | int i; | |
6913 | ||
6914 | for (i = 0; i < 16; i++) | |
6915 | put_smstate(u64, buf, 0x7ff8 - i * 8, kvm_register_read(vcpu, i)); | |
6916 | ||
6917 | put_smstate(u64, buf, 0x7f78, kvm_rip_read(vcpu)); | |
6918 | put_smstate(u32, buf, 0x7f70, kvm_get_rflags(vcpu)); | |
6919 | ||
6920 | kvm_get_dr(vcpu, 6, &val); | |
6921 | put_smstate(u64, buf, 0x7f68, val); | |
6922 | kvm_get_dr(vcpu, 7, &val); | |
6923 | put_smstate(u64, buf, 0x7f60, val); | |
6924 | ||
6925 | put_smstate(u64, buf, 0x7f58, kvm_read_cr0(vcpu)); | |
6926 | put_smstate(u64, buf, 0x7f50, kvm_read_cr3(vcpu)); | |
6927 | put_smstate(u64, buf, 0x7f48, kvm_read_cr4(vcpu)); | |
6928 | ||
6929 | put_smstate(u32, buf, 0x7f00, vcpu->arch.smbase); | |
6930 | ||
6931 | /* revision id */ | |
6932 | put_smstate(u32, buf, 0x7efc, 0x00020064); | |
6933 | ||
6934 | put_smstate(u64, buf, 0x7ed0, vcpu->arch.efer); | |
6935 | ||
6936 | kvm_get_segment(vcpu, &seg, VCPU_SREG_TR); | |
6937 | put_smstate(u16, buf, 0x7e90, seg.selector); | |
ee2cd4b7 | 6938 | put_smstate(u16, buf, 0x7e92, enter_smm_get_segment_flags(&seg) >> 8); |
660a5d51 PB |
6939 | put_smstate(u32, buf, 0x7e94, seg.limit); |
6940 | put_smstate(u64, buf, 0x7e98, seg.base); | |
6941 | ||
6942 | kvm_x86_ops->get_idt(vcpu, &dt); | |
6943 | put_smstate(u32, buf, 0x7e84, dt.size); | |
6944 | put_smstate(u64, buf, 0x7e88, dt.address); | |
6945 | ||
6946 | kvm_get_segment(vcpu, &seg, VCPU_SREG_LDTR); | |
6947 | put_smstate(u16, buf, 0x7e70, seg.selector); | |
ee2cd4b7 | 6948 | put_smstate(u16, buf, 0x7e72, enter_smm_get_segment_flags(&seg) >> 8); |
660a5d51 PB |
6949 | put_smstate(u32, buf, 0x7e74, seg.limit); |
6950 | put_smstate(u64, buf, 0x7e78, seg.base); | |
6951 | ||
6952 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
6953 | put_smstate(u32, buf, 0x7e64, dt.size); | |
6954 | put_smstate(u64, buf, 0x7e68, dt.address); | |
6955 | ||
6956 | for (i = 0; i < 6; i++) | |
ee2cd4b7 | 6957 | enter_smm_save_seg_64(vcpu, buf, i); |
660a5d51 PB |
6958 | #else |
6959 | WARN_ON_ONCE(1); | |
6960 | #endif | |
6961 | } | |
6962 | ||
ee2cd4b7 | 6963 | static void enter_smm(struct kvm_vcpu *vcpu) |
64d60670 | 6964 | { |
660a5d51 | 6965 | struct kvm_segment cs, ds; |
18c3626e | 6966 | struct desc_ptr dt; |
660a5d51 PB |
6967 | char buf[512]; |
6968 | u32 cr0; | |
6969 | ||
660a5d51 | 6970 | trace_kvm_enter_smm(vcpu->vcpu_id, vcpu->arch.smbase, true); |
660a5d51 | 6971 | memset(buf, 0, 512); |
d6321d49 | 6972 | if (guest_cpuid_has(vcpu, X86_FEATURE_LM)) |
ee2cd4b7 | 6973 | enter_smm_save_state_64(vcpu, buf); |
660a5d51 | 6974 | else |
ee2cd4b7 | 6975 | enter_smm_save_state_32(vcpu, buf); |
660a5d51 | 6976 | |
0234bf88 LP |
6977 | /* |
6978 | * Give pre_enter_smm() a chance to make ISA-specific changes to the | |
6979 | * vCPU state (e.g. leave guest mode) after we've saved the state into | |
6980 | * the SMM state-save area. | |
6981 | */ | |
6982 | kvm_x86_ops->pre_enter_smm(vcpu, buf); | |
6983 | ||
6984 | vcpu->arch.hflags |= HF_SMM_MASK; | |
54bf36aa | 6985 | kvm_vcpu_write_guest(vcpu, vcpu->arch.smbase + 0xfe00, buf, sizeof(buf)); |
660a5d51 PB |
6986 | |
6987 | if (kvm_x86_ops->get_nmi_mask(vcpu)) | |
6988 | vcpu->arch.hflags |= HF_SMM_INSIDE_NMI_MASK; | |
6989 | else | |
6990 | kvm_x86_ops->set_nmi_mask(vcpu, true); | |
6991 | ||
6992 | kvm_set_rflags(vcpu, X86_EFLAGS_FIXED); | |
6993 | kvm_rip_write(vcpu, 0x8000); | |
6994 | ||
6995 | cr0 = vcpu->arch.cr0 & ~(X86_CR0_PE | X86_CR0_EM | X86_CR0_TS | X86_CR0_PG); | |
6996 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
6997 | vcpu->arch.cr0 = cr0; | |
6998 | ||
6999 | kvm_x86_ops->set_cr4(vcpu, 0); | |
7000 | ||
18c3626e PB |
7001 | /* Undocumented: IDT limit is set to zero on entry to SMM. */ |
7002 | dt.address = dt.size = 0; | |
7003 | kvm_x86_ops->set_idt(vcpu, &dt); | |
7004 | ||
660a5d51 PB |
7005 | __kvm_set_dr(vcpu, 7, DR7_FIXED_1); |
7006 | ||
7007 | cs.selector = (vcpu->arch.smbase >> 4) & 0xffff; | |
7008 | cs.base = vcpu->arch.smbase; | |
7009 | ||
7010 | ds.selector = 0; | |
7011 | ds.base = 0; | |
7012 | ||
7013 | cs.limit = ds.limit = 0xffffffff; | |
7014 | cs.type = ds.type = 0x3; | |
7015 | cs.dpl = ds.dpl = 0; | |
7016 | cs.db = ds.db = 0; | |
7017 | cs.s = ds.s = 1; | |
7018 | cs.l = ds.l = 0; | |
7019 | cs.g = ds.g = 1; | |
7020 | cs.avl = ds.avl = 0; | |
7021 | cs.present = ds.present = 1; | |
7022 | cs.unusable = ds.unusable = 0; | |
7023 | cs.padding = ds.padding = 0; | |
7024 | ||
7025 | kvm_set_segment(vcpu, &cs, VCPU_SREG_CS); | |
7026 | kvm_set_segment(vcpu, &ds, VCPU_SREG_DS); | |
7027 | kvm_set_segment(vcpu, &ds, VCPU_SREG_ES); | |
7028 | kvm_set_segment(vcpu, &ds, VCPU_SREG_FS); | |
7029 | kvm_set_segment(vcpu, &ds, VCPU_SREG_GS); | |
7030 | kvm_set_segment(vcpu, &ds, VCPU_SREG_SS); | |
7031 | ||
d6321d49 | 7032 | if (guest_cpuid_has(vcpu, X86_FEATURE_LM)) |
660a5d51 PB |
7033 | kvm_x86_ops->set_efer(vcpu, 0); |
7034 | ||
7035 | kvm_update_cpuid(vcpu); | |
7036 | kvm_mmu_reset_context(vcpu); | |
64d60670 PB |
7037 | } |
7038 | ||
ee2cd4b7 | 7039 | static void process_smi(struct kvm_vcpu *vcpu) |
c43203ca PB |
7040 | { |
7041 | vcpu->arch.smi_pending = true; | |
7042 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
7043 | } | |
7044 | ||
2860c4b1 PB |
7045 | void kvm_make_scan_ioapic_request(struct kvm *kvm) |
7046 | { | |
7047 | kvm_make_all_cpus_request(kvm, KVM_REQ_SCAN_IOAPIC); | |
7048 | } | |
7049 | ||
3d81bc7e | 7050 | static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu) |
c7c9c56c | 7051 | { |
5c919412 AS |
7052 | u64 eoi_exit_bitmap[4]; |
7053 | ||
3d81bc7e YZ |
7054 | if (!kvm_apic_hw_enabled(vcpu->arch.apic)) |
7055 | return; | |
c7c9c56c | 7056 | |
6308630b | 7057 | bitmap_zero(vcpu->arch.ioapic_handled_vectors, 256); |
c7c9c56c | 7058 | |
b053b2ae | 7059 | if (irqchip_split(vcpu->kvm)) |
6308630b | 7060 | kvm_scan_ioapic_routes(vcpu, vcpu->arch.ioapic_handled_vectors); |
db2bdcbb | 7061 | else { |
fa59cc00 | 7062 | if (vcpu->arch.apicv_active) |
d62caabb | 7063 | kvm_x86_ops->sync_pir_to_irr(vcpu); |
6308630b | 7064 | kvm_ioapic_scan_entry(vcpu, vcpu->arch.ioapic_handled_vectors); |
db2bdcbb | 7065 | } |
5c919412 AS |
7066 | bitmap_or((ulong *)eoi_exit_bitmap, vcpu->arch.ioapic_handled_vectors, |
7067 | vcpu_to_synic(vcpu)->vec_bitmap, 256); | |
7068 | kvm_x86_ops->load_eoi_exitmap(vcpu, eoi_exit_bitmap); | |
c7c9c56c YZ |
7069 | } |
7070 | ||
b1394e74 RK |
7071 | void kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm, |
7072 | unsigned long start, unsigned long end) | |
7073 | { | |
7074 | unsigned long apic_address; | |
7075 | ||
7076 | /* | |
7077 | * The physical address of apic access page is stored in the VMCS. | |
7078 | * Update it when it becomes invalid. | |
7079 | */ | |
7080 | apic_address = gfn_to_hva(kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT); | |
7081 | if (start <= apic_address && apic_address < end) | |
7082 | kvm_make_all_cpus_request(kvm, KVM_REQ_APIC_PAGE_RELOAD); | |
7083 | } | |
7084 | ||
4256f43f TC |
7085 | void kvm_vcpu_reload_apic_access_page(struct kvm_vcpu *vcpu) |
7086 | { | |
c24ae0dc TC |
7087 | struct page *page = NULL; |
7088 | ||
35754c98 | 7089 | if (!lapic_in_kernel(vcpu)) |
f439ed27 PB |
7090 | return; |
7091 | ||
4256f43f TC |
7092 | if (!kvm_x86_ops->set_apic_access_page_addr) |
7093 | return; | |
7094 | ||
c24ae0dc | 7095 | page = gfn_to_page(vcpu->kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT); |
e8fd5e9e AA |
7096 | if (is_error_page(page)) |
7097 | return; | |
c24ae0dc TC |
7098 | kvm_x86_ops->set_apic_access_page_addr(vcpu, page_to_phys(page)); |
7099 | ||
7100 | /* | |
7101 | * Do not pin apic access page in memory, the MMU notifier | |
7102 | * will call us again if it is migrated or swapped out. | |
7103 | */ | |
7104 | put_page(page); | |
4256f43f TC |
7105 | } |
7106 | EXPORT_SYMBOL_GPL(kvm_vcpu_reload_apic_access_page); | |
7107 | ||
9357d939 | 7108 | /* |
362c698f | 7109 | * Returns 1 to let vcpu_run() continue the guest execution loop without |
9357d939 TY |
7110 | * exiting to the userspace. Otherwise, the value will be returned to the |
7111 | * userspace. | |
7112 | */ | |
851ba692 | 7113 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
7114 | { |
7115 | int r; | |
62a193ed MG |
7116 | bool req_int_win = |
7117 | dm_request_for_irq_injection(vcpu) && | |
7118 | kvm_cpu_accept_dm_intr(vcpu); | |
7119 | ||
730dca42 | 7120 | bool req_immediate_exit = false; |
b6c7a5dc | 7121 | |
2fa6e1e1 | 7122 | if (kvm_request_pending(vcpu)) { |
a8eeb04a | 7123 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) |
2e53d63a | 7124 | kvm_mmu_unload(vcpu); |
a8eeb04a | 7125 | if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu)) |
2f599714 | 7126 | __kvm_migrate_timers(vcpu); |
d828199e MT |
7127 | if (kvm_check_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu)) |
7128 | kvm_gen_update_masterclock(vcpu->kvm); | |
0061d53d MT |
7129 | if (kvm_check_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu)) |
7130 | kvm_gen_kvmclock_update(vcpu); | |
34c238a1 ZA |
7131 | if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) { |
7132 | r = kvm_guest_time_update(vcpu); | |
8cfdc000 ZA |
7133 | if (unlikely(r)) |
7134 | goto out; | |
7135 | } | |
a8eeb04a | 7136 | if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu)) |
4731d4c7 | 7137 | kvm_mmu_sync_roots(vcpu); |
a8eeb04a | 7138 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) |
c2ba05cc | 7139 | kvm_vcpu_flush_tlb(vcpu, true); |
a8eeb04a | 7140 | if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) { |
851ba692 | 7141 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
7142 | r = 0; |
7143 | goto out; | |
7144 | } | |
a8eeb04a | 7145 | if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) { |
851ba692 | 7146 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
bbeac283 | 7147 | vcpu->mmio_needed = 0; |
71c4dfaf JR |
7148 | r = 0; |
7149 | goto out; | |
7150 | } | |
af585b92 GN |
7151 | if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) { |
7152 | /* Page is swapped out. Do synthetic halt */ | |
7153 | vcpu->arch.apf.halted = true; | |
7154 | r = 1; | |
7155 | goto out; | |
7156 | } | |
c9aaa895 GC |
7157 | if (kvm_check_request(KVM_REQ_STEAL_UPDATE, vcpu)) |
7158 | record_steal_time(vcpu); | |
64d60670 PB |
7159 | if (kvm_check_request(KVM_REQ_SMI, vcpu)) |
7160 | process_smi(vcpu); | |
7460fb4a AK |
7161 | if (kvm_check_request(KVM_REQ_NMI, vcpu)) |
7162 | process_nmi(vcpu); | |
f5132b01 | 7163 | if (kvm_check_request(KVM_REQ_PMU, vcpu)) |
c6702c9d | 7164 | kvm_pmu_handle_event(vcpu); |
f5132b01 | 7165 | if (kvm_check_request(KVM_REQ_PMI, vcpu)) |
c6702c9d | 7166 | kvm_pmu_deliver_pmi(vcpu); |
7543a635 SR |
7167 | if (kvm_check_request(KVM_REQ_IOAPIC_EOI_EXIT, vcpu)) { |
7168 | BUG_ON(vcpu->arch.pending_ioapic_eoi > 255); | |
7169 | if (test_bit(vcpu->arch.pending_ioapic_eoi, | |
6308630b | 7170 | vcpu->arch.ioapic_handled_vectors)) { |
7543a635 SR |
7171 | vcpu->run->exit_reason = KVM_EXIT_IOAPIC_EOI; |
7172 | vcpu->run->eoi.vector = | |
7173 | vcpu->arch.pending_ioapic_eoi; | |
7174 | r = 0; | |
7175 | goto out; | |
7176 | } | |
7177 | } | |
3d81bc7e YZ |
7178 | if (kvm_check_request(KVM_REQ_SCAN_IOAPIC, vcpu)) |
7179 | vcpu_scan_ioapic(vcpu); | |
4256f43f TC |
7180 | if (kvm_check_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu)) |
7181 | kvm_vcpu_reload_apic_access_page(vcpu); | |
2ce79189 AS |
7182 | if (kvm_check_request(KVM_REQ_HV_CRASH, vcpu)) { |
7183 | vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; | |
7184 | vcpu->run->system_event.type = KVM_SYSTEM_EVENT_CRASH; | |
7185 | r = 0; | |
7186 | goto out; | |
7187 | } | |
e516cebb AS |
7188 | if (kvm_check_request(KVM_REQ_HV_RESET, vcpu)) { |
7189 | vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; | |
7190 | vcpu->run->system_event.type = KVM_SYSTEM_EVENT_RESET; | |
7191 | r = 0; | |
7192 | goto out; | |
7193 | } | |
db397571 AS |
7194 | if (kvm_check_request(KVM_REQ_HV_EXIT, vcpu)) { |
7195 | vcpu->run->exit_reason = KVM_EXIT_HYPERV; | |
7196 | vcpu->run->hyperv = vcpu->arch.hyperv.exit; | |
7197 | r = 0; | |
7198 | goto out; | |
7199 | } | |
f3b138c5 AS |
7200 | |
7201 | /* | |
7202 | * KVM_REQ_HV_STIMER has to be processed after | |
7203 | * KVM_REQ_CLOCK_UPDATE, because Hyper-V SynIC timers | |
7204 | * depend on the guest clock being up-to-date | |
7205 | */ | |
1f4b34f8 AS |
7206 | if (kvm_check_request(KVM_REQ_HV_STIMER, vcpu)) |
7207 | kvm_hv_process_stimers(vcpu); | |
2f52d58c | 7208 | } |
b93463aa | 7209 | |
b463a6f7 | 7210 | if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { |
0f1e261e | 7211 | ++vcpu->stat.req_event; |
66450a21 JK |
7212 | kvm_apic_accept_events(vcpu); |
7213 | if (vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { | |
7214 | r = 1; | |
7215 | goto out; | |
7216 | } | |
7217 | ||
b6b8a145 JK |
7218 | if (inject_pending_event(vcpu, req_int_win) != 0) |
7219 | req_immediate_exit = true; | |
321c5658 | 7220 | else { |
cc3d967f | 7221 | /* Enable SMI/NMI/IRQ window open exits if needed. |
c43203ca | 7222 | * |
cc3d967f LP |
7223 | * SMIs have three cases: |
7224 | * 1) They can be nested, and then there is nothing to | |
7225 | * do here because RSM will cause a vmexit anyway. | |
7226 | * 2) There is an ISA-specific reason why SMI cannot be | |
7227 | * injected, and the moment when this changes can be | |
7228 | * intercepted. | |
7229 | * 3) Or the SMI can be pending because | |
7230 | * inject_pending_event has completed the injection | |
7231 | * of an IRQ or NMI from the previous vmexit, and | |
7232 | * then we request an immediate exit to inject the | |
7233 | * SMI. | |
c43203ca PB |
7234 | */ |
7235 | if (vcpu->arch.smi_pending && !is_smm(vcpu)) | |
cc3d967f LP |
7236 | if (!kvm_x86_ops->enable_smi_window(vcpu)) |
7237 | req_immediate_exit = true; | |
321c5658 YS |
7238 | if (vcpu->arch.nmi_pending) |
7239 | kvm_x86_ops->enable_nmi_window(vcpu); | |
7240 | if (kvm_cpu_has_injectable_intr(vcpu) || req_int_win) | |
7241 | kvm_x86_ops->enable_irq_window(vcpu); | |
664f8e26 | 7242 | WARN_ON(vcpu->arch.exception.pending); |
321c5658 | 7243 | } |
b463a6f7 AK |
7244 | |
7245 | if (kvm_lapic_enabled(vcpu)) { | |
7246 | update_cr8_intercept(vcpu); | |
7247 | kvm_lapic_sync_to_vapic(vcpu); | |
7248 | } | |
7249 | } | |
7250 | ||
d8368af8 AK |
7251 | r = kvm_mmu_reload(vcpu); |
7252 | if (unlikely(r)) { | |
d905c069 | 7253 | goto cancel_injection; |
d8368af8 AK |
7254 | } |
7255 | ||
b6c7a5dc HB |
7256 | preempt_disable(); |
7257 | ||
7258 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
b95234c8 PB |
7259 | |
7260 | /* | |
7261 | * Disable IRQs before setting IN_GUEST_MODE. Posted interrupt | |
7262 | * IPI are then delayed after guest entry, which ensures that they | |
7263 | * result in virtual interrupt delivery. | |
7264 | */ | |
7265 | local_irq_disable(); | |
6b7e2d09 XG |
7266 | vcpu->mode = IN_GUEST_MODE; |
7267 | ||
01b71917 MT |
7268 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
7269 | ||
0f127d12 | 7270 | /* |
b95234c8 | 7271 | * 1) We should set ->mode before checking ->requests. Please see |
cde9af6e | 7272 | * the comment in kvm_vcpu_exiting_guest_mode(). |
b95234c8 PB |
7273 | * |
7274 | * 2) For APICv, we should set ->mode before checking PIR.ON. This | |
7275 | * pairs with the memory barrier implicit in pi_test_and_set_on | |
7276 | * (see vmx_deliver_posted_interrupt). | |
7277 | * | |
7278 | * 3) This also orders the write to mode from any reads to the page | |
7279 | * tables done while the VCPU is running. Please see the comment | |
7280 | * in kvm_flush_remote_tlbs. | |
6b7e2d09 | 7281 | */ |
01b71917 | 7282 | smp_mb__after_srcu_read_unlock(); |
b6c7a5dc | 7283 | |
b95234c8 PB |
7284 | /* |
7285 | * This handles the case where a posted interrupt was | |
7286 | * notified with kvm_vcpu_kick. | |
7287 | */ | |
fa59cc00 LA |
7288 | if (kvm_lapic_enabled(vcpu) && vcpu->arch.apicv_active) |
7289 | kvm_x86_ops->sync_pir_to_irr(vcpu); | |
32f88400 | 7290 | |
2fa6e1e1 | 7291 | if (vcpu->mode == EXITING_GUEST_MODE || kvm_request_pending(vcpu) |
d94e1dc9 | 7292 | || need_resched() || signal_pending(current)) { |
6b7e2d09 | 7293 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 7294 | smp_wmb(); |
6c142801 AK |
7295 | local_irq_enable(); |
7296 | preempt_enable(); | |
01b71917 | 7297 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
6c142801 | 7298 | r = 1; |
d905c069 | 7299 | goto cancel_injection; |
6c142801 AK |
7300 | } |
7301 | ||
fc5b7f3b DM |
7302 | kvm_load_guest_xcr0(vcpu); |
7303 | ||
c43203ca PB |
7304 | if (req_immediate_exit) { |
7305 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
d6185f20 | 7306 | smp_send_reschedule(vcpu->cpu); |
c43203ca | 7307 | } |
d6185f20 | 7308 | |
8b89fe1f | 7309 | trace_kvm_entry(vcpu->vcpu_id); |
9c48d517 WL |
7310 | if (lapic_timer_advance_ns) |
7311 | wait_lapic_expire(vcpu); | |
6edaa530 | 7312 | guest_enter_irqoff(); |
b6c7a5dc | 7313 | |
42dbaa5a | 7314 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
7315 | set_debugreg(0, 7); |
7316 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
7317 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
7318 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
7319 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
c77fb5fe | 7320 | set_debugreg(vcpu->arch.dr6, 6); |
ae561ede | 7321 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD; |
42dbaa5a | 7322 | } |
b6c7a5dc | 7323 | |
851ba692 | 7324 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 7325 | |
c77fb5fe PB |
7326 | /* |
7327 | * Do this here before restoring debug registers on the host. And | |
7328 | * since we do this before handling the vmexit, a DR access vmexit | |
7329 | * can (a) read the correct value of the debug registers, (b) set | |
7330 | * KVM_DEBUGREG_WONT_EXIT again. | |
7331 | */ | |
7332 | if (unlikely(vcpu->arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT)) { | |
c77fb5fe PB |
7333 | WARN_ON(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP); |
7334 | kvm_x86_ops->sync_dirty_debug_regs(vcpu); | |
70e4da7a PB |
7335 | kvm_update_dr0123(vcpu); |
7336 | kvm_update_dr6(vcpu); | |
7337 | kvm_update_dr7(vcpu); | |
7338 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD; | |
c77fb5fe PB |
7339 | } |
7340 | ||
24f1e32c FW |
7341 | /* |
7342 | * If the guest has used debug registers, at least dr7 | |
7343 | * will be disabled while returning to the host. | |
7344 | * If we don't have active breakpoints in the host, we don't | |
7345 | * care about the messed up debug address registers. But if | |
7346 | * we have some of them active, restore the old state. | |
7347 | */ | |
59d8eb53 | 7348 | if (hw_breakpoint_active()) |
24f1e32c | 7349 | hw_breakpoint_restore(); |
42dbaa5a | 7350 | |
4ba76538 | 7351 | vcpu->arch.last_guest_tsc = kvm_read_l1_tsc(vcpu, rdtsc()); |
1d5f066e | 7352 | |
6b7e2d09 | 7353 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 7354 | smp_wmb(); |
a547c6db | 7355 | |
fc5b7f3b DM |
7356 | kvm_put_guest_xcr0(vcpu); |
7357 | ||
a547c6db | 7358 | kvm_x86_ops->handle_external_intr(vcpu); |
b6c7a5dc HB |
7359 | |
7360 | ++vcpu->stat.exits; | |
7361 | ||
f2485b3e | 7362 | guest_exit_irqoff(); |
b6c7a5dc | 7363 | |
f2485b3e | 7364 | local_irq_enable(); |
b6c7a5dc HB |
7365 | preempt_enable(); |
7366 | ||
f656ce01 | 7367 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 7368 | |
b6c7a5dc HB |
7369 | /* |
7370 | * Profile KVM exit RIPs: | |
7371 | */ | |
7372 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
7373 | unsigned long rip = kvm_rip_read(vcpu); |
7374 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
7375 | } |
7376 | ||
cc578287 ZA |
7377 | if (unlikely(vcpu->arch.tsc_always_catchup)) |
7378 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); | |
298101da | 7379 | |
5cfb1d5a MT |
7380 | if (vcpu->arch.apic_attention) |
7381 | kvm_lapic_sync_from_vapic(vcpu); | |
b93463aa | 7382 | |
618232e2 | 7383 | vcpu->arch.gpa_available = false; |
851ba692 | 7384 | r = kvm_x86_ops->handle_exit(vcpu); |
d905c069 MT |
7385 | return r; |
7386 | ||
7387 | cancel_injection: | |
7388 | kvm_x86_ops->cancel_injection(vcpu); | |
ae7a2a3f MT |
7389 | if (unlikely(vcpu->arch.apic_attention)) |
7390 | kvm_lapic_sync_from_vapic(vcpu); | |
d7690175 MT |
7391 | out: |
7392 | return r; | |
7393 | } | |
b6c7a5dc | 7394 | |
362c698f PB |
7395 | static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu) |
7396 | { | |
bf9f6ac8 FW |
7397 | if (!kvm_arch_vcpu_runnable(vcpu) && |
7398 | (!kvm_x86_ops->pre_block || kvm_x86_ops->pre_block(vcpu) == 0)) { | |
9c8fd1ba PB |
7399 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
7400 | kvm_vcpu_block(vcpu); | |
7401 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); | |
bf9f6ac8 FW |
7402 | |
7403 | if (kvm_x86_ops->post_block) | |
7404 | kvm_x86_ops->post_block(vcpu); | |
7405 | ||
9c8fd1ba PB |
7406 | if (!kvm_check_request(KVM_REQ_UNHALT, vcpu)) |
7407 | return 1; | |
7408 | } | |
362c698f PB |
7409 | |
7410 | kvm_apic_accept_events(vcpu); | |
7411 | switch(vcpu->arch.mp_state) { | |
7412 | case KVM_MP_STATE_HALTED: | |
7413 | vcpu->arch.pv.pv_unhalted = false; | |
7414 | vcpu->arch.mp_state = | |
7415 | KVM_MP_STATE_RUNNABLE; | |
7416 | case KVM_MP_STATE_RUNNABLE: | |
7417 | vcpu->arch.apf.halted = false; | |
7418 | break; | |
7419 | case KVM_MP_STATE_INIT_RECEIVED: | |
7420 | break; | |
7421 | default: | |
7422 | return -EINTR; | |
7423 | break; | |
7424 | } | |
7425 | return 1; | |
7426 | } | |
09cec754 | 7427 | |
5d9bc648 PB |
7428 | static inline bool kvm_vcpu_running(struct kvm_vcpu *vcpu) |
7429 | { | |
0ad3bed6 PB |
7430 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) |
7431 | kvm_x86_ops->check_nested_events(vcpu, false); | |
7432 | ||
5d9bc648 PB |
7433 | return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
7434 | !vcpu->arch.apf.halted); | |
7435 | } | |
7436 | ||
362c698f | 7437 | static int vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
7438 | { |
7439 | int r; | |
f656ce01 | 7440 | struct kvm *kvm = vcpu->kvm; |
d7690175 | 7441 | |
f656ce01 | 7442 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 7443 | |
362c698f | 7444 | for (;;) { |
58f800d5 | 7445 | if (kvm_vcpu_running(vcpu)) { |
851ba692 | 7446 | r = vcpu_enter_guest(vcpu); |
bf9f6ac8 | 7447 | } else { |
362c698f | 7448 | r = vcpu_block(kvm, vcpu); |
bf9f6ac8 FW |
7449 | } |
7450 | ||
09cec754 GN |
7451 | if (r <= 0) |
7452 | break; | |
7453 | ||
72875d8a | 7454 | kvm_clear_request(KVM_REQ_PENDING_TIMER, vcpu); |
09cec754 GN |
7455 | if (kvm_cpu_has_pending_timer(vcpu)) |
7456 | kvm_inject_pending_timer_irqs(vcpu); | |
7457 | ||
782d422b MG |
7458 | if (dm_request_for_irq_injection(vcpu) && |
7459 | kvm_vcpu_ready_for_interrupt_injection(vcpu)) { | |
4ca7dd8c PB |
7460 | r = 0; |
7461 | vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; | |
09cec754 | 7462 | ++vcpu->stat.request_irq_exits; |
362c698f | 7463 | break; |
09cec754 | 7464 | } |
af585b92 GN |
7465 | |
7466 | kvm_check_async_pf_completion(vcpu); | |
7467 | ||
09cec754 GN |
7468 | if (signal_pending(current)) { |
7469 | r = -EINTR; | |
851ba692 | 7470 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 | 7471 | ++vcpu->stat.signal_exits; |
362c698f | 7472 | break; |
09cec754 GN |
7473 | } |
7474 | if (need_resched()) { | |
f656ce01 | 7475 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
c08ac06a | 7476 | cond_resched(); |
f656ce01 | 7477 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 7478 | } |
b6c7a5dc HB |
7479 | } |
7480 | ||
f656ce01 | 7481 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc HB |
7482 | |
7483 | return r; | |
7484 | } | |
7485 | ||
716d51ab GN |
7486 | static inline int complete_emulated_io(struct kvm_vcpu *vcpu) |
7487 | { | |
7488 | int r; | |
7489 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
7490 | r = emulate_instruction(vcpu, EMULTYPE_NO_DECODE); | |
7491 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); | |
7492 | if (r != EMULATE_DONE) | |
7493 | return 0; | |
7494 | return 1; | |
7495 | } | |
7496 | ||
7497 | static int complete_emulated_pio(struct kvm_vcpu *vcpu) | |
7498 | { | |
7499 | BUG_ON(!vcpu->arch.pio.count); | |
7500 | ||
7501 | return complete_emulated_io(vcpu); | |
7502 | } | |
7503 | ||
f78146b0 AK |
7504 | /* |
7505 | * Implements the following, as a state machine: | |
7506 | * | |
7507 | * read: | |
7508 | * for each fragment | |
87da7e66 XG |
7509 | * for each mmio piece in the fragment |
7510 | * write gpa, len | |
7511 | * exit | |
7512 | * copy data | |
f78146b0 AK |
7513 | * execute insn |
7514 | * | |
7515 | * write: | |
7516 | * for each fragment | |
87da7e66 XG |
7517 | * for each mmio piece in the fragment |
7518 | * write gpa, len | |
7519 | * copy data | |
7520 | * exit | |
f78146b0 | 7521 | */ |
716d51ab | 7522 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu) |
5287f194 AK |
7523 | { |
7524 | struct kvm_run *run = vcpu->run; | |
f78146b0 | 7525 | struct kvm_mmio_fragment *frag; |
87da7e66 | 7526 | unsigned len; |
5287f194 | 7527 | |
716d51ab | 7528 | BUG_ON(!vcpu->mmio_needed); |
5287f194 | 7529 | |
716d51ab | 7530 | /* Complete previous fragment */ |
87da7e66 XG |
7531 | frag = &vcpu->mmio_fragments[vcpu->mmio_cur_fragment]; |
7532 | len = min(8u, frag->len); | |
716d51ab | 7533 | if (!vcpu->mmio_is_write) |
87da7e66 XG |
7534 | memcpy(frag->data, run->mmio.data, len); |
7535 | ||
7536 | if (frag->len <= 8) { | |
7537 | /* Switch to the next fragment. */ | |
7538 | frag++; | |
7539 | vcpu->mmio_cur_fragment++; | |
7540 | } else { | |
7541 | /* Go forward to the next mmio piece. */ | |
7542 | frag->data += len; | |
7543 | frag->gpa += len; | |
7544 | frag->len -= len; | |
7545 | } | |
7546 | ||
a08d3b3b | 7547 | if (vcpu->mmio_cur_fragment >= vcpu->mmio_nr_fragments) { |
716d51ab | 7548 | vcpu->mmio_needed = 0; |
0912c977 PB |
7549 | |
7550 | /* FIXME: return into emulator if single-stepping. */ | |
cef4dea0 | 7551 | if (vcpu->mmio_is_write) |
716d51ab GN |
7552 | return 1; |
7553 | vcpu->mmio_read_completed = 1; | |
7554 | return complete_emulated_io(vcpu); | |
7555 | } | |
87da7e66 | 7556 | |
716d51ab GN |
7557 | run->exit_reason = KVM_EXIT_MMIO; |
7558 | run->mmio.phys_addr = frag->gpa; | |
7559 | if (vcpu->mmio_is_write) | |
87da7e66 XG |
7560 | memcpy(run->mmio.data, frag->data, min(8u, frag->len)); |
7561 | run->mmio.len = min(8u, frag->len); | |
716d51ab GN |
7562 | run->mmio.is_write = vcpu->mmio_is_write; |
7563 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; | |
7564 | return 0; | |
5287f194 AK |
7565 | } |
7566 | ||
b6c7a5dc HB |
7567 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
7568 | { | |
7569 | int r; | |
b6c7a5dc | 7570 | |
accb757d | 7571 | vcpu_load(vcpu); |
20b7035c | 7572 | kvm_sigset_activate(vcpu); |
5663d8f9 PX |
7573 | kvm_load_guest_fpu(vcpu); |
7574 | ||
a4535290 | 7575 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
2f173d26 JS |
7576 | if (kvm_run->immediate_exit) { |
7577 | r = -EINTR; | |
7578 | goto out; | |
7579 | } | |
b6c7a5dc | 7580 | kvm_vcpu_block(vcpu); |
66450a21 | 7581 | kvm_apic_accept_events(vcpu); |
72875d8a | 7582 | kvm_clear_request(KVM_REQ_UNHALT, vcpu); |
ac9f6dc0 | 7583 | r = -EAGAIN; |
a0595000 JS |
7584 | if (signal_pending(current)) { |
7585 | r = -EINTR; | |
7586 | vcpu->run->exit_reason = KVM_EXIT_INTR; | |
7587 | ++vcpu->stat.signal_exits; | |
7588 | } | |
ac9f6dc0 | 7589 | goto out; |
b6c7a5dc HB |
7590 | } |
7591 | ||
01643c51 KH |
7592 | if (vcpu->run->kvm_valid_regs & ~KVM_SYNC_X86_VALID_FIELDS) { |
7593 | r = -EINVAL; | |
7594 | goto out; | |
7595 | } | |
7596 | ||
7597 | if (vcpu->run->kvm_dirty_regs) { | |
7598 | r = sync_regs(vcpu); | |
7599 | if (r != 0) | |
7600 | goto out; | |
7601 | } | |
7602 | ||
b6c7a5dc | 7603 | /* re-sync apic's tpr */ |
35754c98 | 7604 | if (!lapic_in_kernel(vcpu)) { |
eea1cff9 AP |
7605 | if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) { |
7606 | r = -EINVAL; | |
7607 | goto out; | |
7608 | } | |
7609 | } | |
b6c7a5dc | 7610 | |
716d51ab GN |
7611 | if (unlikely(vcpu->arch.complete_userspace_io)) { |
7612 | int (*cui)(struct kvm_vcpu *) = vcpu->arch.complete_userspace_io; | |
7613 | vcpu->arch.complete_userspace_io = NULL; | |
7614 | r = cui(vcpu); | |
7615 | if (r <= 0) | |
5663d8f9 | 7616 | goto out; |
716d51ab GN |
7617 | } else |
7618 | WARN_ON(vcpu->arch.pio.count || vcpu->mmio_needed); | |
5287f194 | 7619 | |
460df4c1 PB |
7620 | if (kvm_run->immediate_exit) |
7621 | r = -EINTR; | |
7622 | else | |
7623 | r = vcpu_run(vcpu); | |
b6c7a5dc HB |
7624 | |
7625 | out: | |
5663d8f9 | 7626 | kvm_put_guest_fpu(vcpu); |
01643c51 KH |
7627 | if (vcpu->run->kvm_valid_regs) |
7628 | store_regs(vcpu); | |
f1d86e46 | 7629 | post_kvm_run_save(vcpu); |
20b7035c | 7630 | kvm_sigset_deactivate(vcpu); |
b6c7a5dc | 7631 | |
accb757d | 7632 | vcpu_put(vcpu); |
b6c7a5dc HB |
7633 | return r; |
7634 | } | |
7635 | ||
01643c51 | 7636 | static void __get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
b6c7a5dc | 7637 | { |
7ae441ea GN |
7638 | if (vcpu->arch.emulate_regs_need_sync_to_vcpu) { |
7639 | /* | |
7640 | * We are here if userspace calls get_regs() in the middle of | |
7641 | * instruction emulation. Registers state needs to be copied | |
4a969980 | 7642 | * back from emulation context to vcpu. Userspace shouldn't do |
7ae441ea GN |
7643 | * that usually, but some bad designed PV devices (vmware |
7644 | * backdoor interface) need this to work | |
7645 | */ | |
dd856efa | 7646 | emulator_writeback_register_cache(&vcpu->arch.emulate_ctxt); |
7ae441ea GN |
7647 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
7648 | } | |
5fdbf976 MT |
7649 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
7650 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
7651 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
7652 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
7653 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
7654 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
7655 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
7656 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 7657 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
7658 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
7659 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
7660 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
7661 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
7662 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
7663 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
7664 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
7665 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
7666 | #endif |
7667 | ||
5fdbf976 | 7668 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 7669 | regs->rflags = kvm_get_rflags(vcpu); |
01643c51 | 7670 | } |
b6c7a5dc | 7671 | |
01643c51 KH |
7672 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
7673 | { | |
7674 | vcpu_load(vcpu); | |
7675 | __get_regs(vcpu, regs); | |
1fc9b76b | 7676 | vcpu_put(vcpu); |
b6c7a5dc HB |
7677 | return 0; |
7678 | } | |
7679 | ||
01643c51 | 7680 | static void __set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
b6c7a5dc | 7681 | { |
7ae441ea GN |
7682 | vcpu->arch.emulate_regs_need_sync_from_vcpu = true; |
7683 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; | |
7684 | ||
5fdbf976 MT |
7685 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
7686 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
7687 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
7688 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
7689 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
7690 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
7691 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
7692 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 7693 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
7694 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
7695 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
7696 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
7697 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
7698 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
7699 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
7700 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
7701 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
7702 | #endif |
7703 | ||
5fdbf976 | 7704 | kvm_rip_write(vcpu, regs->rip); |
d73235d1 | 7705 | kvm_set_rflags(vcpu, regs->rflags | X86_EFLAGS_FIXED); |
b6c7a5dc | 7706 | |
b4f14abd JK |
7707 | vcpu->arch.exception.pending = false; |
7708 | ||
3842d135 | 7709 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
01643c51 | 7710 | } |
3842d135 | 7711 | |
01643c51 KH |
7712 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
7713 | { | |
7714 | vcpu_load(vcpu); | |
7715 | __set_regs(vcpu, regs); | |
875656fe | 7716 | vcpu_put(vcpu); |
b6c7a5dc HB |
7717 | return 0; |
7718 | } | |
7719 | ||
b6c7a5dc HB |
7720 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
7721 | { | |
7722 | struct kvm_segment cs; | |
7723 | ||
3e6e0aab | 7724 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
7725 | *db = cs.db; |
7726 | *l = cs.l; | |
7727 | } | |
7728 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
7729 | ||
01643c51 | 7730 | static void __get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) |
b6c7a5dc | 7731 | { |
89a27f4d | 7732 | struct desc_ptr dt; |
b6c7a5dc | 7733 | |
3e6e0aab GT |
7734 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
7735 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
7736 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
7737 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
7738 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
7739 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 7740 | |
3e6e0aab GT |
7741 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
7742 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
7743 | |
7744 | kvm_x86_ops->get_idt(vcpu, &dt); | |
89a27f4d GN |
7745 | sregs->idt.limit = dt.size; |
7746 | sregs->idt.base = dt.address; | |
b6c7a5dc | 7747 | kvm_x86_ops->get_gdt(vcpu, &dt); |
89a27f4d GN |
7748 | sregs->gdt.limit = dt.size; |
7749 | sregs->gdt.base = dt.address; | |
b6c7a5dc | 7750 | |
4d4ec087 | 7751 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c | 7752 | sregs->cr2 = vcpu->arch.cr2; |
9f8fe504 | 7753 | sregs->cr3 = kvm_read_cr3(vcpu); |
fc78f519 | 7754 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 7755 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 7756 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
7757 | sregs->apic_base = kvm_get_apic_base(vcpu); |
7758 | ||
923c61bb | 7759 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 7760 | |
36752c9b | 7761 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
7762 | set_bit(vcpu->arch.interrupt.nr, |
7763 | (unsigned long *)sregs->interrupt_bitmap); | |
01643c51 | 7764 | } |
16d7a191 | 7765 | |
01643c51 KH |
7766 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
7767 | struct kvm_sregs *sregs) | |
7768 | { | |
7769 | vcpu_load(vcpu); | |
7770 | __get_sregs(vcpu, sregs); | |
bcdec41c | 7771 | vcpu_put(vcpu); |
b6c7a5dc HB |
7772 | return 0; |
7773 | } | |
7774 | ||
62d9f0db MT |
7775 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
7776 | struct kvm_mp_state *mp_state) | |
7777 | { | |
fd232561 CD |
7778 | vcpu_load(vcpu); |
7779 | ||
66450a21 | 7780 | kvm_apic_accept_events(vcpu); |
6aef266c SV |
7781 | if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED && |
7782 | vcpu->arch.pv.pv_unhalted) | |
7783 | mp_state->mp_state = KVM_MP_STATE_RUNNABLE; | |
7784 | else | |
7785 | mp_state->mp_state = vcpu->arch.mp_state; | |
7786 | ||
fd232561 | 7787 | vcpu_put(vcpu); |
62d9f0db MT |
7788 | return 0; |
7789 | } | |
7790 | ||
7791 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
7792 | struct kvm_mp_state *mp_state) | |
7793 | { | |
e83dff5e CD |
7794 | int ret = -EINVAL; |
7795 | ||
7796 | vcpu_load(vcpu); | |
7797 | ||
bce87cce | 7798 | if (!lapic_in_kernel(vcpu) && |
66450a21 | 7799 | mp_state->mp_state != KVM_MP_STATE_RUNNABLE) |
e83dff5e | 7800 | goto out; |
66450a21 | 7801 | |
28bf2888 DH |
7802 | /* INITs are latched while in SMM */ |
7803 | if ((is_smm(vcpu) || vcpu->arch.smi_pending) && | |
7804 | (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED || | |
7805 | mp_state->mp_state == KVM_MP_STATE_INIT_RECEIVED)) | |
e83dff5e | 7806 | goto out; |
28bf2888 | 7807 | |
66450a21 JK |
7808 | if (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED) { |
7809 | vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; | |
7810 | set_bit(KVM_APIC_SIPI, &vcpu->arch.apic->pending_events); | |
7811 | } else | |
7812 | vcpu->arch.mp_state = mp_state->mp_state; | |
3842d135 | 7813 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
e83dff5e CD |
7814 | |
7815 | ret = 0; | |
7816 | out: | |
7817 | vcpu_put(vcpu); | |
7818 | return ret; | |
62d9f0db MT |
7819 | } |
7820 | ||
7f3d35fd KW |
7821 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, |
7822 | int reason, bool has_error_code, u32 error_code) | |
b6c7a5dc | 7823 | { |
9d74191a | 7824 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d | 7825 | int ret; |
e01c2426 | 7826 | |
8ec4722d | 7827 | init_emulate_ctxt(vcpu); |
c697518a | 7828 | |
7f3d35fd | 7829 | ret = emulator_task_switch(ctxt, tss_selector, idt_index, reason, |
9d74191a | 7830 | has_error_code, error_code); |
c697518a | 7831 | |
c697518a | 7832 | if (ret) |
19d04437 | 7833 | return EMULATE_FAIL; |
37817f29 | 7834 | |
9d74191a TY |
7835 | kvm_rip_write(vcpu, ctxt->eip); |
7836 | kvm_set_rflags(vcpu, ctxt->eflags); | |
3842d135 | 7837 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
19d04437 | 7838 | return EMULATE_DONE; |
37817f29 IE |
7839 | } |
7840 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
7841 | ||
f2981033 LT |
7842 | int kvm_valid_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) |
7843 | { | |
37b95951 | 7844 | if ((sregs->efer & EFER_LME) && (sregs->cr0 & X86_CR0_PG)) { |
f2981033 LT |
7845 | /* |
7846 | * When EFER.LME and CR0.PG are set, the processor is in | |
7847 | * 64-bit mode (though maybe in a 32-bit code segment). | |
7848 | * CR4.PAE and EFER.LMA must be set. | |
7849 | */ | |
37b95951 | 7850 | if (!(sregs->cr4 & X86_CR4_PAE) |
f2981033 LT |
7851 | || !(sregs->efer & EFER_LMA)) |
7852 | return -EINVAL; | |
7853 | } else { | |
7854 | /* | |
7855 | * Not in 64-bit mode: EFER.LMA is clear and the code | |
7856 | * segment cannot be 64-bit. | |
7857 | */ | |
7858 | if (sregs->efer & EFER_LMA || sregs->cs.l) | |
7859 | return -EINVAL; | |
7860 | } | |
7861 | ||
7862 | return 0; | |
7863 | } | |
7864 | ||
01643c51 | 7865 | static int __set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) |
b6c7a5dc | 7866 | { |
58cb628d | 7867 | struct msr_data apic_base_msr; |
b6c7a5dc | 7868 | int mmu_reset_needed = 0; |
63f42e02 | 7869 | int pending_vec, max_bits, idx; |
89a27f4d | 7870 | struct desc_ptr dt; |
b4ef9d4e CD |
7871 | int ret = -EINVAL; |
7872 | ||
d6321d49 RK |
7873 | if (!guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) && |
7874 | (sregs->cr4 & X86_CR4_OSXSAVE)) | |
b4ef9d4e | 7875 | goto out; |
6d1068b3 | 7876 | |
f2981033 | 7877 | if (kvm_valid_sregs(vcpu, sregs)) |
8dbfb2bf | 7878 | goto out; |
f2981033 | 7879 | |
d3802286 JM |
7880 | apic_base_msr.data = sregs->apic_base; |
7881 | apic_base_msr.host_initiated = true; | |
7882 | if (kvm_set_apic_base(vcpu, &apic_base_msr)) | |
b4ef9d4e | 7883 | goto out; |
6d1068b3 | 7884 | |
89a27f4d GN |
7885 | dt.size = sregs->idt.limit; |
7886 | dt.address = sregs->idt.base; | |
b6c7a5dc | 7887 | kvm_x86_ops->set_idt(vcpu, &dt); |
89a27f4d GN |
7888 | dt.size = sregs->gdt.limit; |
7889 | dt.address = sregs->gdt.base; | |
b6c7a5dc HB |
7890 | kvm_x86_ops->set_gdt(vcpu, &dt); |
7891 | ||
ad312c7c | 7892 | vcpu->arch.cr2 = sregs->cr2; |
9f8fe504 | 7893 | mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3; |
dc7e795e | 7894 | vcpu->arch.cr3 = sregs->cr3; |
aff48baa | 7895 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
b6c7a5dc | 7896 | |
2d3ad1f4 | 7897 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 7898 | |
f6801dff | 7899 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 7900 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc | 7901 | |
4d4ec087 | 7902 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 7903 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 7904 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 7905 | |
fc78f519 | 7906 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 7907 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
b9baba86 | 7908 | if (sregs->cr4 & (X86_CR4_OSXSAVE | X86_CR4_PKE)) |
00b27a3e | 7909 | kvm_update_cpuid(vcpu); |
63f42e02 XG |
7910 | |
7911 | idx = srcu_read_lock(&vcpu->kvm->srcu); | |
7c93be44 | 7912 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
9f8fe504 | 7913 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); |
7c93be44 MT |
7914 | mmu_reset_needed = 1; |
7915 | } | |
63f42e02 | 7916 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b6c7a5dc HB |
7917 | |
7918 | if (mmu_reset_needed) | |
7919 | kvm_mmu_reset_context(vcpu); | |
7920 | ||
a50abc3b | 7921 | max_bits = KVM_NR_INTERRUPTS; |
923c61bb GN |
7922 | pending_vec = find_first_bit( |
7923 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
7924 | if (pending_vec < max_bits) { | |
66fd3f7f | 7925 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb | 7926 | pr_debug("Set back pending irq %d\n", pending_vec); |
b6c7a5dc HB |
7927 | } |
7928 | ||
3e6e0aab GT |
7929 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
7930 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
7931 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
7932 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
7933 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
7934 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 7935 | |
3e6e0aab GT |
7936 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
7937 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 7938 | |
5f0269f5 ME |
7939 | update_cr8_intercept(vcpu); |
7940 | ||
9c3e4aab | 7941 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 7942 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 7943 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 7944 | !is_protmode(vcpu)) |
9c3e4aab MT |
7945 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
7946 | ||
3842d135 AK |
7947 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
7948 | ||
b4ef9d4e CD |
7949 | ret = 0; |
7950 | out: | |
01643c51 KH |
7951 | return ret; |
7952 | } | |
7953 | ||
7954 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
7955 | struct kvm_sregs *sregs) | |
7956 | { | |
7957 | int ret; | |
7958 | ||
7959 | vcpu_load(vcpu); | |
7960 | ret = __set_sregs(vcpu, sregs); | |
b4ef9d4e CD |
7961 | vcpu_put(vcpu); |
7962 | return ret; | |
b6c7a5dc HB |
7963 | } |
7964 | ||
d0bfb940 JK |
7965 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
7966 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 7967 | { |
355be0b9 | 7968 | unsigned long rflags; |
ae675ef0 | 7969 | int i, r; |
b6c7a5dc | 7970 | |
66b56562 CD |
7971 | vcpu_load(vcpu); |
7972 | ||
4f926bf2 JK |
7973 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
7974 | r = -EBUSY; | |
7975 | if (vcpu->arch.exception.pending) | |
2122ff5e | 7976 | goto out; |
4f926bf2 JK |
7977 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
7978 | kvm_queue_exception(vcpu, DB_VECTOR); | |
7979 | else | |
7980 | kvm_queue_exception(vcpu, BP_VECTOR); | |
7981 | } | |
7982 | ||
91586a3b JK |
7983 | /* |
7984 | * Read rflags as long as potentially injected trace flags are still | |
7985 | * filtered out. | |
7986 | */ | |
7987 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
7988 | |
7989 | vcpu->guest_debug = dbg->control; | |
7990 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
7991 | vcpu->guest_debug = 0; | |
7992 | ||
7993 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
7994 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
7995 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
c8639010 | 7996 | vcpu->arch.guest_debug_dr7 = dbg->arch.debugreg[7]; |
ae675ef0 JK |
7997 | } else { |
7998 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
7999 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
ae675ef0 | 8000 | } |
c8639010 | 8001 | kvm_update_dr7(vcpu); |
ae675ef0 | 8002 | |
f92653ee JK |
8003 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
8004 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + | |
8005 | get_segment_base(vcpu, VCPU_SREG_CS); | |
94fe45da | 8006 | |
91586a3b JK |
8007 | /* |
8008 | * Trigger an rflags update that will inject or remove the trace | |
8009 | * flags. | |
8010 | */ | |
8011 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 8012 | |
a96036b8 | 8013 | kvm_x86_ops->update_bp_intercept(vcpu); |
b6c7a5dc | 8014 | |
4f926bf2 | 8015 | r = 0; |
d0bfb940 | 8016 | |
2122ff5e | 8017 | out: |
66b56562 | 8018 | vcpu_put(vcpu); |
b6c7a5dc HB |
8019 | return r; |
8020 | } | |
8021 | ||
8b006791 ZX |
8022 | /* |
8023 | * Translate a guest virtual address to a guest physical address. | |
8024 | */ | |
8025 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
8026 | struct kvm_translation *tr) | |
8027 | { | |
8028 | unsigned long vaddr = tr->linear_address; | |
8029 | gpa_t gpa; | |
f656ce01 | 8030 | int idx; |
8b006791 | 8031 | |
1da5b61d CD |
8032 | vcpu_load(vcpu); |
8033 | ||
f656ce01 | 8034 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 8035 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 8036 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
8037 | tr->physical_address = gpa; |
8038 | tr->valid = gpa != UNMAPPED_GVA; | |
8039 | tr->writeable = 1; | |
8040 | tr->usermode = 0; | |
8b006791 | 8041 | |
1da5b61d | 8042 | vcpu_put(vcpu); |
8b006791 ZX |
8043 | return 0; |
8044 | } | |
8045 | ||
d0752060 HB |
8046 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
8047 | { | |
1393123e | 8048 | struct fxregs_state *fxsave; |
d0752060 | 8049 | |
1393123e | 8050 | vcpu_load(vcpu); |
d0752060 | 8051 | |
1393123e | 8052 | fxsave = &vcpu->arch.guest_fpu.state.fxsave; |
d0752060 HB |
8053 | memcpy(fpu->fpr, fxsave->st_space, 128); |
8054 | fpu->fcw = fxsave->cwd; | |
8055 | fpu->fsw = fxsave->swd; | |
8056 | fpu->ftwx = fxsave->twd; | |
8057 | fpu->last_opcode = fxsave->fop; | |
8058 | fpu->last_ip = fxsave->rip; | |
8059 | fpu->last_dp = fxsave->rdp; | |
8060 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
8061 | ||
1393123e | 8062 | vcpu_put(vcpu); |
d0752060 HB |
8063 | return 0; |
8064 | } | |
8065 | ||
8066 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
8067 | { | |
6a96bc7f CD |
8068 | struct fxregs_state *fxsave; |
8069 | ||
8070 | vcpu_load(vcpu); | |
8071 | ||
8072 | fxsave = &vcpu->arch.guest_fpu.state.fxsave; | |
d0752060 | 8073 | |
d0752060 HB |
8074 | memcpy(fxsave->st_space, fpu->fpr, 128); |
8075 | fxsave->cwd = fpu->fcw; | |
8076 | fxsave->swd = fpu->fsw; | |
8077 | fxsave->twd = fpu->ftwx; | |
8078 | fxsave->fop = fpu->last_opcode; | |
8079 | fxsave->rip = fpu->last_ip; | |
8080 | fxsave->rdp = fpu->last_dp; | |
8081 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
8082 | ||
6a96bc7f | 8083 | vcpu_put(vcpu); |
d0752060 HB |
8084 | return 0; |
8085 | } | |
8086 | ||
01643c51 KH |
8087 | static void store_regs(struct kvm_vcpu *vcpu) |
8088 | { | |
8089 | BUILD_BUG_ON(sizeof(struct kvm_sync_regs) > SYNC_REGS_SIZE_BYTES); | |
8090 | ||
8091 | if (vcpu->run->kvm_valid_regs & KVM_SYNC_X86_REGS) | |
8092 | __get_regs(vcpu, &vcpu->run->s.regs.regs); | |
8093 | ||
8094 | if (vcpu->run->kvm_valid_regs & KVM_SYNC_X86_SREGS) | |
8095 | __get_sregs(vcpu, &vcpu->run->s.regs.sregs); | |
8096 | ||
8097 | if (vcpu->run->kvm_valid_regs & KVM_SYNC_X86_EVENTS) | |
8098 | kvm_vcpu_ioctl_x86_get_vcpu_events( | |
8099 | vcpu, &vcpu->run->s.regs.events); | |
8100 | } | |
8101 | ||
8102 | static int sync_regs(struct kvm_vcpu *vcpu) | |
8103 | { | |
8104 | if (vcpu->run->kvm_dirty_regs & ~KVM_SYNC_X86_VALID_FIELDS) | |
8105 | return -EINVAL; | |
8106 | ||
8107 | if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_REGS) { | |
8108 | __set_regs(vcpu, &vcpu->run->s.regs.regs); | |
8109 | vcpu->run->kvm_dirty_regs &= ~KVM_SYNC_X86_REGS; | |
8110 | } | |
8111 | if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_SREGS) { | |
8112 | if (__set_sregs(vcpu, &vcpu->run->s.regs.sregs)) | |
8113 | return -EINVAL; | |
8114 | vcpu->run->kvm_dirty_regs &= ~KVM_SYNC_X86_SREGS; | |
8115 | } | |
8116 | if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_EVENTS) { | |
8117 | if (kvm_vcpu_ioctl_x86_set_vcpu_events( | |
8118 | vcpu, &vcpu->run->s.regs.events)) | |
8119 | return -EINVAL; | |
8120 | vcpu->run->kvm_dirty_regs &= ~KVM_SYNC_X86_EVENTS; | |
8121 | } | |
8122 | ||
8123 | return 0; | |
8124 | } | |
8125 | ||
0ee6a517 | 8126 | static void fx_init(struct kvm_vcpu *vcpu) |
d0752060 | 8127 | { |
bf935b0b | 8128 | fpstate_init(&vcpu->arch.guest_fpu.state); |
782511b0 | 8129 | if (boot_cpu_has(X86_FEATURE_XSAVES)) |
7366ed77 | 8130 | vcpu->arch.guest_fpu.state.xsave.header.xcomp_bv = |
df1daba7 | 8131 | host_xcr0 | XSTATE_COMPACTION_ENABLED; |
d0752060 | 8132 | |
2acf923e DC |
8133 | /* |
8134 | * Ensure guest xcr0 is valid for loading | |
8135 | */ | |
d91cab78 | 8136 | vcpu->arch.xcr0 = XFEATURE_MASK_FP; |
2acf923e | 8137 | |
ad312c7c | 8138 | vcpu->arch.cr0 |= X86_CR0_ET; |
d0752060 | 8139 | } |
d0752060 | 8140 | |
f775b13e | 8141 | /* Swap (qemu) user FPU context for the guest FPU context. */ |
d0752060 HB |
8142 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
8143 | { | |
f775b13e RR |
8144 | preempt_disable(); |
8145 | copy_fpregs_to_fpstate(&vcpu->arch.user_fpu); | |
38cfd5e3 PB |
8146 | /* PKRU is separately restored in kvm_x86_ops->run. */ |
8147 | __copy_kernel_to_fpregs(&vcpu->arch.guest_fpu.state, | |
8148 | ~XFEATURE_MASK_PKRU); | |
f775b13e | 8149 | preempt_enable(); |
0c04851c | 8150 | trace_kvm_fpu(1); |
d0752060 | 8151 | } |
d0752060 | 8152 | |
f775b13e | 8153 | /* When vcpu_run ends, restore user space FPU context. */ |
d0752060 HB |
8154 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) |
8155 | { | |
f775b13e | 8156 | preempt_disable(); |
4f836347 | 8157 | copy_fpregs_to_fpstate(&vcpu->arch.guest_fpu); |
f775b13e RR |
8158 | copy_kernel_to_fpregs(&vcpu->arch.user_fpu.state); |
8159 | preempt_enable(); | |
f096ed85 | 8160 | ++vcpu->stat.fpu_reload; |
0c04851c | 8161 | trace_kvm_fpu(0); |
d0752060 | 8162 | } |
e9b11c17 ZX |
8163 | |
8164 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
8165 | { | |
bd768e14 IY |
8166 | void *wbinvd_dirty_mask = vcpu->arch.wbinvd_dirty_mask; |
8167 | ||
12f9a48f | 8168 | kvmclock_reset(vcpu); |
7f1ea208 | 8169 | |
e9b11c17 | 8170 | kvm_x86_ops->vcpu_free(vcpu); |
bd768e14 | 8171 | free_cpumask_var(wbinvd_dirty_mask); |
e9b11c17 ZX |
8172 | } |
8173 | ||
8174 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
8175 | unsigned int id) | |
8176 | { | |
c447e76b LL |
8177 | struct kvm_vcpu *vcpu; |
8178 | ||
b0c39dc6 | 8179 | if (kvm_check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0) |
6755bae8 ZA |
8180 | printk_once(KERN_WARNING |
8181 | "kvm: SMP vm created on host with unstable TSC; " | |
8182 | "guest TSC will not be reliable\n"); | |
c447e76b LL |
8183 | |
8184 | vcpu = kvm_x86_ops->vcpu_create(kvm, id); | |
8185 | ||
c447e76b | 8186 | return vcpu; |
26e5215f | 8187 | } |
e9b11c17 | 8188 | |
26e5215f AK |
8189 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
8190 | { | |
19efffa2 | 8191 | kvm_vcpu_mtrr_init(vcpu); |
ec7660cc | 8192 | vcpu_load(vcpu); |
d28bc9dd | 8193 | kvm_vcpu_reset(vcpu, false); |
8a3c1a33 | 8194 | kvm_mmu_setup(vcpu); |
e9b11c17 | 8195 | vcpu_put(vcpu); |
ec7660cc | 8196 | return 0; |
e9b11c17 ZX |
8197 | } |
8198 | ||
31928aa5 | 8199 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 8200 | { |
8fe8ab46 | 8201 | struct msr_data msr; |
332967a3 | 8202 | struct kvm *kvm = vcpu->kvm; |
42897d86 | 8203 | |
d3457c87 RK |
8204 | kvm_hv_vcpu_postcreate(vcpu); |
8205 | ||
ec7660cc | 8206 | if (mutex_lock_killable(&vcpu->mutex)) |
31928aa5 | 8207 | return; |
ec7660cc | 8208 | vcpu_load(vcpu); |
8fe8ab46 WA |
8209 | msr.data = 0x0; |
8210 | msr.index = MSR_IA32_TSC; | |
8211 | msr.host_initiated = true; | |
8212 | kvm_write_tsc(vcpu, &msr); | |
42897d86 | 8213 | vcpu_put(vcpu); |
ec7660cc | 8214 | mutex_unlock(&vcpu->mutex); |
42897d86 | 8215 | |
630994b3 MT |
8216 | if (!kvmclock_periodic_sync) |
8217 | return; | |
8218 | ||
332967a3 AJ |
8219 | schedule_delayed_work(&kvm->arch.kvmclock_sync_work, |
8220 | KVMCLOCK_SYNC_PERIOD); | |
42897d86 MT |
8221 | } |
8222 | ||
d40ccc62 | 8223 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 | 8224 | { |
344d9588 GN |
8225 | vcpu->arch.apf.msr_val = 0; |
8226 | ||
ec7660cc | 8227 | vcpu_load(vcpu); |
e9b11c17 ZX |
8228 | kvm_mmu_unload(vcpu); |
8229 | vcpu_put(vcpu); | |
8230 | ||
8231 | kvm_x86_ops->vcpu_free(vcpu); | |
8232 | } | |
8233 | ||
d28bc9dd | 8234 | void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) |
e9b11c17 | 8235 | { |
b7e31be3 RK |
8236 | kvm_lapic_reset(vcpu, init_event); |
8237 | ||
e69fab5d PB |
8238 | vcpu->arch.hflags = 0; |
8239 | ||
c43203ca | 8240 | vcpu->arch.smi_pending = 0; |
52797bf9 | 8241 | vcpu->arch.smi_count = 0; |
7460fb4a AK |
8242 | atomic_set(&vcpu->arch.nmi_queued, 0); |
8243 | vcpu->arch.nmi_pending = 0; | |
448fa4a9 | 8244 | vcpu->arch.nmi_injected = false; |
5f7552d4 NA |
8245 | kvm_clear_interrupt_queue(vcpu); |
8246 | kvm_clear_exception_queue(vcpu); | |
664f8e26 | 8247 | vcpu->arch.exception.pending = false; |
448fa4a9 | 8248 | |
42dbaa5a | 8249 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); |
ae561ede | 8250 | kvm_update_dr0123(vcpu); |
6f43ed01 | 8251 | vcpu->arch.dr6 = DR6_INIT; |
73aaf249 | 8252 | kvm_update_dr6(vcpu); |
42dbaa5a | 8253 | vcpu->arch.dr7 = DR7_FIXED_1; |
c8639010 | 8254 | kvm_update_dr7(vcpu); |
42dbaa5a | 8255 | |
1119022c NA |
8256 | vcpu->arch.cr2 = 0; |
8257 | ||
3842d135 | 8258 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
344d9588 | 8259 | vcpu->arch.apf.msr_val = 0; |
c9aaa895 | 8260 | vcpu->arch.st.msr_val = 0; |
3842d135 | 8261 | |
12f9a48f GC |
8262 | kvmclock_reset(vcpu); |
8263 | ||
af585b92 GN |
8264 | kvm_clear_async_pf_completion_queue(vcpu); |
8265 | kvm_async_pf_hash_reset(vcpu); | |
8266 | vcpu->arch.apf.halted = false; | |
3842d135 | 8267 | |
a554d207 WL |
8268 | if (kvm_mpx_supported()) { |
8269 | void *mpx_state_buffer; | |
8270 | ||
8271 | /* | |
8272 | * To avoid have the INIT path from kvm_apic_has_events() that be | |
8273 | * called with loaded FPU and does not let userspace fix the state. | |
8274 | */ | |
f775b13e RR |
8275 | if (init_event) |
8276 | kvm_put_guest_fpu(vcpu); | |
a554d207 WL |
8277 | mpx_state_buffer = get_xsave_addr(&vcpu->arch.guest_fpu.state.xsave, |
8278 | XFEATURE_MASK_BNDREGS); | |
8279 | if (mpx_state_buffer) | |
8280 | memset(mpx_state_buffer, 0, sizeof(struct mpx_bndreg_state)); | |
8281 | mpx_state_buffer = get_xsave_addr(&vcpu->arch.guest_fpu.state.xsave, | |
8282 | XFEATURE_MASK_BNDCSR); | |
8283 | if (mpx_state_buffer) | |
8284 | memset(mpx_state_buffer, 0, sizeof(struct mpx_bndcsr)); | |
f775b13e RR |
8285 | if (init_event) |
8286 | kvm_load_guest_fpu(vcpu); | |
a554d207 WL |
8287 | } |
8288 | ||
64d60670 | 8289 | if (!init_event) { |
d28bc9dd | 8290 | kvm_pmu_reset(vcpu); |
64d60670 | 8291 | vcpu->arch.smbase = 0x30000; |
db2336a8 KH |
8292 | |
8293 | vcpu->arch.msr_platform_info = MSR_PLATFORM_INFO_CPUID_FAULT; | |
8294 | vcpu->arch.msr_misc_features_enables = 0; | |
a554d207 WL |
8295 | |
8296 | vcpu->arch.xcr0 = XFEATURE_MASK_FP; | |
64d60670 | 8297 | } |
f5132b01 | 8298 | |
66f7b72e JS |
8299 | memset(vcpu->arch.regs, 0, sizeof(vcpu->arch.regs)); |
8300 | vcpu->arch.regs_avail = ~0; | |
8301 | vcpu->arch.regs_dirty = ~0; | |
8302 | ||
a554d207 WL |
8303 | vcpu->arch.ia32_xss = 0; |
8304 | ||
d28bc9dd | 8305 | kvm_x86_ops->vcpu_reset(vcpu, init_event); |
e9b11c17 ZX |
8306 | } |
8307 | ||
2b4a273b | 8308 | void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector) |
66450a21 JK |
8309 | { |
8310 | struct kvm_segment cs; | |
8311 | ||
8312 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
8313 | cs.selector = vector << 8; | |
8314 | cs.base = vector << 12; | |
8315 | kvm_set_segment(vcpu, &cs, VCPU_SREG_CS); | |
8316 | kvm_rip_write(vcpu, 0); | |
e9b11c17 ZX |
8317 | } |
8318 | ||
13a34e06 | 8319 | int kvm_arch_hardware_enable(void) |
e9b11c17 | 8320 | { |
ca84d1a2 ZA |
8321 | struct kvm *kvm; |
8322 | struct kvm_vcpu *vcpu; | |
8323 | int i; | |
0dd6a6ed ZA |
8324 | int ret; |
8325 | u64 local_tsc; | |
8326 | u64 max_tsc = 0; | |
8327 | bool stable, backwards_tsc = false; | |
18863bdd AK |
8328 | |
8329 | kvm_shared_msr_cpu_online(); | |
13a34e06 | 8330 | ret = kvm_x86_ops->hardware_enable(); |
0dd6a6ed ZA |
8331 | if (ret != 0) |
8332 | return ret; | |
8333 | ||
4ea1636b | 8334 | local_tsc = rdtsc(); |
b0c39dc6 | 8335 | stable = !kvm_check_tsc_unstable(); |
0dd6a6ed ZA |
8336 | list_for_each_entry(kvm, &vm_list, vm_list) { |
8337 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
8338 | if (!stable && vcpu->cpu == smp_processor_id()) | |
105b21bb | 8339 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0dd6a6ed ZA |
8340 | if (stable && vcpu->arch.last_host_tsc > local_tsc) { |
8341 | backwards_tsc = true; | |
8342 | if (vcpu->arch.last_host_tsc > max_tsc) | |
8343 | max_tsc = vcpu->arch.last_host_tsc; | |
8344 | } | |
8345 | } | |
8346 | } | |
8347 | ||
8348 | /* | |
8349 | * Sometimes, even reliable TSCs go backwards. This happens on | |
8350 | * platforms that reset TSC during suspend or hibernate actions, but | |
8351 | * maintain synchronization. We must compensate. Fortunately, we can | |
8352 | * detect that condition here, which happens early in CPU bringup, | |
8353 | * before any KVM threads can be running. Unfortunately, we can't | |
8354 | * bring the TSCs fully up to date with real time, as we aren't yet far | |
8355 | * enough into CPU bringup that we know how much real time has actually | |
108b249c | 8356 | * elapsed; our helper function, ktime_get_boot_ns() will be using boot |
0dd6a6ed ZA |
8357 | * variables that haven't been updated yet. |
8358 | * | |
8359 | * So we simply find the maximum observed TSC above, then record the | |
8360 | * adjustment to TSC in each VCPU. When the VCPU later gets loaded, | |
8361 | * the adjustment will be applied. Note that we accumulate | |
8362 | * adjustments, in case multiple suspend cycles happen before some VCPU | |
8363 | * gets a chance to run again. In the event that no KVM threads get a | |
8364 | * chance to run, we will miss the entire elapsed period, as we'll have | |
8365 | * reset last_host_tsc, so VCPUs will not have the TSC adjusted and may | |
8366 | * loose cycle time. This isn't too big a deal, since the loss will be | |
8367 | * uniform across all VCPUs (not to mention the scenario is extremely | |
8368 | * unlikely). It is possible that a second hibernate recovery happens | |
8369 | * much faster than a first, causing the observed TSC here to be | |
8370 | * smaller; this would require additional padding adjustment, which is | |
8371 | * why we set last_host_tsc to the local tsc observed here. | |
8372 | * | |
8373 | * N.B. - this code below runs only on platforms with reliable TSC, | |
8374 | * as that is the only way backwards_tsc is set above. Also note | |
8375 | * that this runs for ALL vcpus, which is not a bug; all VCPUs should | |
8376 | * have the same delta_cyc adjustment applied if backwards_tsc | |
8377 | * is detected. Note further, this adjustment is only done once, | |
8378 | * as we reset last_host_tsc on all VCPUs to stop this from being | |
8379 | * called multiple times (one for each physical CPU bringup). | |
8380 | * | |
4a969980 | 8381 | * Platforms with unreliable TSCs don't have to deal with this, they |
0dd6a6ed ZA |
8382 | * will be compensated by the logic in vcpu_load, which sets the TSC to |
8383 | * catchup mode. This will catchup all VCPUs to real time, but cannot | |
8384 | * guarantee that they stay in perfect synchronization. | |
8385 | */ | |
8386 | if (backwards_tsc) { | |
8387 | u64 delta_cyc = max_tsc - local_tsc; | |
8388 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
a826faf1 | 8389 | kvm->arch.backwards_tsc_observed = true; |
0dd6a6ed ZA |
8390 | kvm_for_each_vcpu(i, vcpu, kvm) { |
8391 | vcpu->arch.tsc_offset_adjustment += delta_cyc; | |
8392 | vcpu->arch.last_host_tsc = local_tsc; | |
105b21bb | 8393 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
0dd6a6ed ZA |
8394 | } |
8395 | ||
8396 | /* | |
8397 | * We have to disable TSC offset matching.. if you were | |
8398 | * booting a VM while issuing an S4 host suspend.... | |
8399 | * you may have some problem. Solving this issue is | |
8400 | * left as an exercise to the reader. | |
8401 | */ | |
8402 | kvm->arch.last_tsc_nsec = 0; | |
8403 | kvm->arch.last_tsc_write = 0; | |
8404 | } | |
8405 | ||
8406 | } | |
8407 | return 0; | |
e9b11c17 ZX |
8408 | } |
8409 | ||
13a34e06 | 8410 | void kvm_arch_hardware_disable(void) |
e9b11c17 | 8411 | { |
13a34e06 RK |
8412 | kvm_x86_ops->hardware_disable(); |
8413 | drop_user_return_notifiers(); | |
e9b11c17 ZX |
8414 | } |
8415 | ||
8416 | int kvm_arch_hardware_setup(void) | |
8417 | { | |
9e9c3fe4 NA |
8418 | int r; |
8419 | ||
8420 | r = kvm_x86_ops->hardware_setup(); | |
8421 | if (r != 0) | |
8422 | return r; | |
8423 | ||
35181e86 HZ |
8424 | if (kvm_has_tsc_control) { |
8425 | /* | |
8426 | * Make sure the user can only configure tsc_khz values that | |
8427 | * fit into a signed integer. | |
8428 | * A min value is not calculated needed because it will always | |
8429 | * be 1 on all machines. | |
8430 | */ | |
8431 | u64 max = min(0x7fffffffULL, | |
8432 | __scale_tsc(kvm_max_tsc_scaling_ratio, tsc_khz)); | |
8433 | kvm_max_guest_tsc_khz = max; | |
8434 | ||
ad721883 | 8435 | kvm_default_tsc_scaling_ratio = 1ULL << kvm_tsc_scaling_ratio_frac_bits; |
35181e86 | 8436 | } |
ad721883 | 8437 | |
9e9c3fe4 NA |
8438 | kvm_init_msr_list(); |
8439 | return 0; | |
e9b11c17 ZX |
8440 | } |
8441 | ||
8442 | void kvm_arch_hardware_unsetup(void) | |
8443 | { | |
8444 | kvm_x86_ops->hardware_unsetup(); | |
8445 | } | |
8446 | ||
8447 | void kvm_arch_check_processor_compat(void *rtn) | |
8448 | { | |
8449 | kvm_x86_ops->check_processor_compatibility(rtn); | |
d71ba788 PB |
8450 | } |
8451 | ||
8452 | bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu) | |
8453 | { | |
8454 | return vcpu->kvm->arch.bsp_vcpu_id == vcpu->vcpu_id; | |
8455 | } | |
8456 | EXPORT_SYMBOL_GPL(kvm_vcpu_is_reset_bsp); | |
8457 | ||
8458 | bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) | |
8459 | { | |
8460 | return (vcpu->arch.apic_base & MSR_IA32_APICBASE_BSP) != 0; | |
e9b11c17 ZX |
8461 | } |
8462 | ||
54e9818f | 8463 | struct static_key kvm_no_apic_vcpu __read_mostly; |
bce87cce | 8464 | EXPORT_SYMBOL_GPL(kvm_no_apic_vcpu); |
54e9818f | 8465 | |
e9b11c17 ZX |
8466 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
8467 | { | |
8468 | struct page *page; | |
e9b11c17 ZX |
8469 | int r; |
8470 | ||
b2a05fef | 8471 | vcpu->arch.apicv_active = kvm_x86_ops->get_enable_apicv(vcpu); |
9aabc88f | 8472 | vcpu->arch.emulate_ctxt.ops = &emulate_ops; |
26de7988 | 8473 | if (!irqchip_in_kernel(vcpu->kvm) || kvm_vcpu_is_reset_bsp(vcpu)) |
a4535290 | 8474 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 8475 | else |
a4535290 | 8476 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
8477 | |
8478 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
8479 | if (!page) { | |
8480 | r = -ENOMEM; | |
8481 | goto fail; | |
8482 | } | |
ad312c7c | 8483 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 | 8484 | |
cc578287 | 8485 | kvm_set_tsc_khz(vcpu, max_tsc_khz); |
c285545f | 8486 | |
e9b11c17 ZX |
8487 | r = kvm_mmu_create(vcpu); |
8488 | if (r < 0) | |
8489 | goto fail_free_pio_data; | |
8490 | ||
26de7988 | 8491 | if (irqchip_in_kernel(vcpu->kvm)) { |
e9b11c17 ZX |
8492 | r = kvm_create_lapic(vcpu); |
8493 | if (r < 0) | |
8494 | goto fail_mmu_destroy; | |
54e9818f GN |
8495 | } else |
8496 | static_key_slow_inc(&kvm_no_apic_vcpu); | |
e9b11c17 | 8497 | |
890ca9ae HY |
8498 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
8499 | GFP_KERNEL); | |
8500 | if (!vcpu->arch.mce_banks) { | |
8501 | r = -ENOMEM; | |
443c39bc | 8502 | goto fail_free_lapic; |
890ca9ae HY |
8503 | } |
8504 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
8505 | ||
f1797359 WY |
8506 | if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL)) { |
8507 | r = -ENOMEM; | |
f5f48ee1 | 8508 | goto fail_free_mce_banks; |
f1797359 | 8509 | } |
f5f48ee1 | 8510 | |
0ee6a517 | 8511 | fx_init(vcpu); |
66f7b72e | 8512 | |
4344ee98 | 8513 | vcpu->arch.guest_xstate_size = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET; |
d7876f1b | 8514 | |
5a4f55cd EK |
8515 | vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu); |
8516 | ||
74545705 RK |
8517 | vcpu->arch.pat = MSR_IA32_CR_PAT_DEFAULT; |
8518 | ||
af585b92 | 8519 | kvm_async_pf_hash_reset(vcpu); |
f5132b01 | 8520 | kvm_pmu_init(vcpu); |
af585b92 | 8521 | |
1c1a9ce9 | 8522 | vcpu->arch.pending_external_vector = -1; |
de63ad4c | 8523 | vcpu->arch.preempted_in_kernel = false; |
1c1a9ce9 | 8524 | |
5c919412 AS |
8525 | kvm_hv_vcpu_init(vcpu); |
8526 | ||
e9b11c17 | 8527 | return 0; |
0ee6a517 | 8528 | |
f5f48ee1 SY |
8529 | fail_free_mce_banks: |
8530 | kfree(vcpu->arch.mce_banks); | |
443c39bc WY |
8531 | fail_free_lapic: |
8532 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
8533 | fail_mmu_destroy: |
8534 | kvm_mmu_destroy(vcpu); | |
8535 | fail_free_pio_data: | |
ad312c7c | 8536 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
8537 | fail: |
8538 | return r; | |
8539 | } | |
8540 | ||
8541 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
8542 | { | |
f656ce01 MT |
8543 | int idx; |
8544 | ||
1f4b34f8 | 8545 | kvm_hv_vcpu_uninit(vcpu); |
f5132b01 | 8546 | kvm_pmu_destroy(vcpu); |
36cb93fd | 8547 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 8548 | kvm_free_lapic(vcpu); |
f656ce01 | 8549 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 8550 | kvm_mmu_destroy(vcpu); |
f656ce01 | 8551 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 8552 | free_page((unsigned long)vcpu->arch.pio_data); |
35754c98 | 8553 | if (!lapic_in_kernel(vcpu)) |
54e9818f | 8554 | static_key_slow_dec(&kvm_no_apic_vcpu); |
e9b11c17 | 8555 | } |
d19a9cd2 | 8556 | |
e790d9ef RK |
8557 | void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) |
8558 | { | |
ae97a3b8 | 8559 | kvm_x86_ops->sched_in(vcpu, cpu); |
e790d9ef RK |
8560 | } |
8561 | ||
e08b9637 | 8562 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
d19a9cd2 | 8563 | { |
e08b9637 CO |
8564 | if (type) |
8565 | return -EINVAL; | |
8566 | ||
6ef768fa | 8567 | INIT_HLIST_HEAD(&kvm->arch.mask_notifier_list); |
f05e70ac | 8568 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
365c8868 | 8569 | INIT_LIST_HEAD(&kvm->arch.zapped_obsolete_pages); |
4d5c5d0f | 8570 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
e0f0bbc5 | 8571 | atomic_set(&kvm->arch.noncoherent_dma_count, 0); |
d19a9cd2 | 8572 | |
5550af4d SY |
8573 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
8574 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
7a84428a AW |
8575 | /* Reserve bit 1 of irq_sources_bitmap for irqfd-resampler */ |
8576 | set_bit(KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID, | |
8577 | &kvm->arch.irq_sources_bitmap); | |
5550af4d | 8578 | |
038f8c11 | 8579 | raw_spin_lock_init(&kvm->arch.tsc_write_lock); |
1e08ec4a | 8580 | mutex_init(&kvm->arch.apic_map_lock); |
d828199e MT |
8581 | spin_lock_init(&kvm->arch.pvclock_gtod_sync_lock); |
8582 | ||
108b249c | 8583 | kvm->arch.kvmclock_offset = -ktime_get_boot_ns(); |
d828199e | 8584 | pvclock_update_vm_gtod_copy(kvm); |
53f658b3 | 8585 | |
7e44e449 | 8586 | INIT_DELAYED_WORK(&kvm->arch.kvmclock_update_work, kvmclock_update_fn); |
332967a3 | 8587 | INIT_DELAYED_WORK(&kvm->arch.kvmclock_sync_work, kvmclock_sync_fn); |
7e44e449 | 8588 | |
cbc0236a | 8589 | kvm_hv_init_vm(kvm); |
0eb05bf2 | 8590 | kvm_page_track_init(kvm); |
13d268ca | 8591 | kvm_mmu_init_vm(kvm); |
0eb05bf2 | 8592 | |
03543133 SS |
8593 | if (kvm_x86_ops->vm_init) |
8594 | return kvm_x86_ops->vm_init(kvm); | |
8595 | ||
d89f5eff | 8596 | return 0; |
d19a9cd2 ZX |
8597 | } |
8598 | ||
8599 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
8600 | { | |
ec7660cc | 8601 | vcpu_load(vcpu); |
d19a9cd2 ZX |
8602 | kvm_mmu_unload(vcpu); |
8603 | vcpu_put(vcpu); | |
8604 | } | |
8605 | ||
8606 | static void kvm_free_vcpus(struct kvm *kvm) | |
8607 | { | |
8608 | unsigned int i; | |
988a2cae | 8609 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
8610 | |
8611 | /* | |
8612 | * Unpin any mmu pages first. | |
8613 | */ | |
af585b92 GN |
8614 | kvm_for_each_vcpu(i, vcpu, kvm) { |
8615 | kvm_clear_async_pf_completion_queue(vcpu); | |
988a2cae | 8616 | kvm_unload_vcpu_mmu(vcpu); |
af585b92 | 8617 | } |
988a2cae GN |
8618 | kvm_for_each_vcpu(i, vcpu, kvm) |
8619 | kvm_arch_vcpu_free(vcpu); | |
8620 | ||
8621 | mutex_lock(&kvm->lock); | |
8622 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
8623 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 8624 | |
988a2cae GN |
8625 | atomic_set(&kvm->online_vcpus, 0); |
8626 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
8627 | } |
8628 | ||
ad8ba2cd SY |
8629 | void kvm_arch_sync_events(struct kvm *kvm) |
8630 | { | |
332967a3 | 8631 | cancel_delayed_work_sync(&kvm->arch.kvmclock_sync_work); |
7e44e449 | 8632 | cancel_delayed_work_sync(&kvm->arch.kvmclock_update_work); |
aea924f6 | 8633 | kvm_free_pit(kvm); |
ad8ba2cd SY |
8634 | } |
8635 | ||
1d8007bd | 8636 | int __x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size) |
9da0e4d5 PB |
8637 | { |
8638 | int i, r; | |
25188b99 | 8639 | unsigned long hva; |
f0d648bd PB |
8640 | struct kvm_memslots *slots = kvm_memslots(kvm); |
8641 | struct kvm_memory_slot *slot, old; | |
9da0e4d5 PB |
8642 | |
8643 | /* Called with kvm->slots_lock held. */ | |
1d8007bd PB |
8644 | if (WARN_ON(id >= KVM_MEM_SLOTS_NUM)) |
8645 | return -EINVAL; | |
9da0e4d5 | 8646 | |
f0d648bd PB |
8647 | slot = id_to_memslot(slots, id); |
8648 | if (size) { | |
b21629da | 8649 | if (slot->npages) |
f0d648bd PB |
8650 | return -EEXIST; |
8651 | ||
8652 | /* | |
8653 | * MAP_SHARED to prevent internal slot pages from being moved | |
8654 | * by fork()/COW. | |
8655 | */ | |
8656 | hva = vm_mmap(NULL, 0, size, PROT_READ | PROT_WRITE, | |
8657 | MAP_SHARED | MAP_ANONYMOUS, 0); | |
8658 | if (IS_ERR((void *)hva)) | |
8659 | return PTR_ERR((void *)hva); | |
8660 | } else { | |
8661 | if (!slot->npages) | |
8662 | return 0; | |
8663 | ||
8664 | hva = 0; | |
8665 | } | |
8666 | ||
8667 | old = *slot; | |
9da0e4d5 | 8668 | for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) { |
1d8007bd | 8669 | struct kvm_userspace_memory_region m; |
9da0e4d5 | 8670 | |
1d8007bd PB |
8671 | m.slot = id | (i << 16); |
8672 | m.flags = 0; | |
8673 | m.guest_phys_addr = gpa; | |
f0d648bd | 8674 | m.userspace_addr = hva; |
1d8007bd | 8675 | m.memory_size = size; |
9da0e4d5 PB |
8676 | r = __kvm_set_memory_region(kvm, &m); |
8677 | if (r < 0) | |
8678 | return r; | |
8679 | } | |
8680 | ||
103c763c EB |
8681 | if (!size) |
8682 | vm_munmap(old.userspace_addr, old.npages * PAGE_SIZE); | |
f0d648bd | 8683 | |
9da0e4d5 PB |
8684 | return 0; |
8685 | } | |
8686 | EXPORT_SYMBOL_GPL(__x86_set_memory_region); | |
8687 | ||
1d8007bd | 8688 | int x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size) |
9da0e4d5 PB |
8689 | { |
8690 | int r; | |
8691 | ||
8692 | mutex_lock(&kvm->slots_lock); | |
1d8007bd | 8693 | r = __x86_set_memory_region(kvm, id, gpa, size); |
9da0e4d5 PB |
8694 | mutex_unlock(&kvm->slots_lock); |
8695 | ||
8696 | return r; | |
8697 | } | |
8698 | EXPORT_SYMBOL_GPL(x86_set_memory_region); | |
8699 | ||
d19a9cd2 ZX |
8700 | void kvm_arch_destroy_vm(struct kvm *kvm) |
8701 | { | |
27469d29 AH |
8702 | if (current->mm == kvm->mm) { |
8703 | /* | |
8704 | * Free memory regions allocated on behalf of userspace, | |
8705 | * unless the the memory map has changed due to process exit | |
8706 | * or fd copying. | |
8707 | */ | |
1d8007bd PB |
8708 | x86_set_memory_region(kvm, APIC_ACCESS_PAGE_PRIVATE_MEMSLOT, 0, 0); |
8709 | x86_set_memory_region(kvm, IDENTITY_PAGETABLE_PRIVATE_MEMSLOT, 0, 0); | |
8710 | x86_set_memory_region(kvm, TSS_PRIVATE_MEMSLOT, 0, 0); | |
27469d29 | 8711 | } |
03543133 SS |
8712 | if (kvm_x86_ops->vm_destroy) |
8713 | kvm_x86_ops->vm_destroy(kvm); | |
c761159c PX |
8714 | kvm_pic_destroy(kvm); |
8715 | kvm_ioapic_destroy(kvm); | |
d19a9cd2 | 8716 | kvm_free_vcpus(kvm); |
af1bae54 | 8717 | kvfree(rcu_dereference_check(kvm->arch.apic_map, 1)); |
13d268ca | 8718 | kvm_mmu_uninit_vm(kvm); |
2beb6dad | 8719 | kvm_page_track_cleanup(kvm); |
cbc0236a | 8720 | kvm_hv_destroy_vm(kvm); |
d19a9cd2 | 8721 | } |
0de10343 | 8722 | |
5587027c | 8723 | void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, |
db3fe4eb TY |
8724 | struct kvm_memory_slot *dont) |
8725 | { | |
8726 | int i; | |
8727 | ||
d89cc617 TY |
8728 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
8729 | if (!dont || free->arch.rmap[i] != dont->arch.rmap[i]) { | |
548ef284 | 8730 | kvfree(free->arch.rmap[i]); |
d89cc617 | 8731 | free->arch.rmap[i] = NULL; |
77d11309 | 8732 | } |
d89cc617 TY |
8733 | if (i == 0) |
8734 | continue; | |
8735 | ||
8736 | if (!dont || free->arch.lpage_info[i - 1] != | |
8737 | dont->arch.lpage_info[i - 1]) { | |
548ef284 | 8738 | kvfree(free->arch.lpage_info[i - 1]); |
d89cc617 | 8739 | free->arch.lpage_info[i - 1] = NULL; |
db3fe4eb TY |
8740 | } |
8741 | } | |
21ebbeda XG |
8742 | |
8743 | kvm_page_track_free_memslot(free, dont); | |
db3fe4eb TY |
8744 | } |
8745 | ||
5587027c AK |
8746 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
8747 | unsigned long npages) | |
db3fe4eb TY |
8748 | { |
8749 | int i; | |
8750 | ||
d89cc617 | 8751 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
92f94f1e | 8752 | struct kvm_lpage_info *linfo; |
db3fe4eb TY |
8753 | unsigned long ugfn; |
8754 | int lpages; | |
d89cc617 | 8755 | int level = i + 1; |
db3fe4eb TY |
8756 | |
8757 | lpages = gfn_to_index(slot->base_gfn + npages - 1, | |
8758 | slot->base_gfn, level) + 1; | |
8759 | ||
d89cc617 | 8760 | slot->arch.rmap[i] = |
a7c3e901 | 8761 | kvzalloc(lpages * sizeof(*slot->arch.rmap[i]), GFP_KERNEL); |
d89cc617 | 8762 | if (!slot->arch.rmap[i]) |
77d11309 | 8763 | goto out_free; |
d89cc617 TY |
8764 | if (i == 0) |
8765 | continue; | |
77d11309 | 8766 | |
a7c3e901 | 8767 | linfo = kvzalloc(lpages * sizeof(*linfo), GFP_KERNEL); |
92f94f1e | 8768 | if (!linfo) |
db3fe4eb TY |
8769 | goto out_free; |
8770 | ||
92f94f1e XG |
8771 | slot->arch.lpage_info[i - 1] = linfo; |
8772 | ||
db3fe4eb | 8773 | if (slot->base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1)) |
92f94f1e | 8774 | linfo[0].disallow_lpage = 1; |
db3fe4eb | 8775 | if ((slot->base_gfn + npages) & (KVM_PAGES_PER_HPAGE(level) - 1)) |
92f94f1e | 8776 | linfo[lpages - 1].disallow_lpage = 1; |
db3fe4eb TY |
8777 | ugfn = slot->userspace_addr >> PAGE_SHIFT; |
8778 | /* | |
8779 | * If the gfn and userspace address are not aligned wrt each | |
8780 | * other, or if explicitly asked to, disable large page | |
8781 | * support for this slot | |
8782 | */ | |
8783 | if ((slot->base_gfn ^ ugfn) & (KVM_PAGES_PER_HPAGE(level) - 1) || | |
8784 | !kvm_largepages_enabled()) { | |
8785 | unsigned long j; | |
8786 | ||
8787 | for (j = 0; j < lpages; ++j) | |
92f94f1e | 8788 | linfo[j].disallow_lpage = 1; |
db3fe4eb TY |
8789 | } |
8790 | } | |
8791 | ||
21ebbeda XG |
8792 | if (kvm_page_track_create_memslot(slot, npages)) |
8793 | goto out_free; | |
8794 | ||
db3fe4eb TY |
8795 | return 0; |
8796 | ||
8797 | out_free: | |
d89cc617 | 8798 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
548ef284 | 8799 | kvfree(slot->arch.rmap[i]); |
d89cc617 TY |
8800 | slot->arch.rmap[i] = NULL; |
8801 | if (i == 0) | |
8802 | continue; | |
8803 | ||
548ef284 | 8804 | kvfree(slot->arch.lpage_info[i - 1]); |
d89cc617 | 8805 | slot->arch.lpage_info[i - 1] = NULL; |
db3fe4eb TY |
8806 | } |
8807 | return -ENOMEM; | |
8808 | } | |
8809 | ||
15f46015 | 8810 | void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) |
e59dbe09 | 8811 | { |
e6dff7d1 TY |
8812 | /* |
8813 | * memslots->generation has been incremented. | |
8814 | * mmio generation may have reached its maximum value. | |
8815 | */ | |
54bf36aa | 8816 | kvm_mmu_invalidate_mmio_sptes(kvm, slots); |
e59dbe09 TY |
8817 | } |
8818 | ||
f7784b8e MT |
8819 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
8820 | struct kvm_memory_slot *memslot, | |
09170a49 | 8821 | const struct kvm_userspace_memory_region *mem, |
7b6195a9 | 8822 | enum kvm_mr_change change) |
0de10343 | 8823 | { |
f7784b8e MT |
8824 | return 0; |
8825 | } | |
8826 | ||
88178fd4 KH |
8827 | static void kvm_mmu_slot_apply_flags(struct kvm *kvm, |
8828 | struct kvm_memory_slot *new) | |
8829 | { | |
8830 | /* Still write protect RO slot */ | |
8831 | if (new->flags & KVM_MEM_READONLY) { | |
8832 | kvm_mmu_slot_remove_write_access(kvm, new); | |
8833 | return; | |
8834 | } | |
8835 | ||
8836 | /* | |
8837 | * Call kvm_x86_ops dirty logging hooks when they are valid. | |
8838 | * | |
8839 | * kvm_x86_ops->slot_disable_log_dirty is called when: | |
8840 | * | |
8841 | * - KVM_MR_CREATE with dirty logging is disabled | |
8842 | * - KVM_MR_FLAGS_ONLY with dirty logging is disabled in new flag | |
8843 | * | |
8844 | * The reason is, in case of PML, we need to set D-bit for any slots | |
8845 | * with dirty logging disabled in order to eliminate unnecessary GPA | |
8846 | * logging in PML buffer (and potential PML buffer full VMEXT). This | |
8847 | * guarantees leaving PML enabled during guest's lifetime won't have | |
8848 | * any additonal overhead from PML when guest is running with dirty | |
8849 | * logging disabled for memory slots. | |
8850 | * | |
8851 | * kvm_x86_ops->slot_enable_log_dirty is called when switching new slot | |
8852 | * to dirty logging mode. | |
8853 | * | |
8854 | * If kvm_x86_ops dirty logging hooks are invalid, use write protect. | |
8855 | * | |
8856 | * In case of write protect: | |
8857 | * | |
8858 | * Write protect all pages for dirty logging. | |
8859 | * | |
8860 | * All the sptes including the large sptes which point to this | |
8861 | * slot are set to readonly. We can not create any new large | |
8862 | * spte on this slot until the end of the logging. | |
8863 | * | |
8864 | * See the comments in fast_page_fault(). | |
8865 | */ | |
8866 | if (new->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
8867 | if (kvm_x86_ops->slot_enable_log_dirty) | |
8868 | kvm_x86_ops->slot_enable_log_dirty(kvm, new); | |
8869 | else | |
8870 | kvm_mmu_slot_remove_write_access(kvm, new); | |
8871 | } else { | |
8872 | if (kvm_x86_ops->slot_disable_log_dirty) | |
8873 | kvm_x86_ops->slot_disable_log_dirty(kvm, new); | |
8874 | } | |
8875 | } | |
8876 | ||
f7784b8e | 8877 | void kvm_arch_commit_memory_region(struct kvm *kvm, |
09170a49 | 8878 | const struct kvm_userspace_memory_region *mem, |
8482644a | 8879 | const struct kvm_memory_slot *old, |
f36f3f28 | 8880 | const struct kvm_memory_slot *new, |
8482644a | 8881 | enum kvm_mr_change change) |
f7784b8e | 8882 | { |
8482644a | 8883 | int nr_mmu_pages = 0; |
f7784b8e | 8884 | |
48c0e4e9 XG |
8885 | if (!kvm->arch.n_requested_mmu_pages) |
8886 | nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); | |
8887 | ||
48c0e4e9 | 8888 | if (nr_mmu_pages) |
0de10343 | 8889 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); |
1c91cad4 | 8890 | |
3ea3b7fa WL |
8891 | /* |
8892 | * Dirty logging tracks sptes in 4k granularity, meaning that large | |
8893 | * sptes have to be split. If live migration is successful, the guest | |
8894 | * in the source machine will be destroyed and large sptes will be | |
8895 | * created in the destination. However, if the guest continues to run | |
8896 | * in the source machine (for example if live migration fails), small | |
8897 | * sptes will remain around and cause bad performance. | |
8898 | * | |
8899 | * Scan sptes if dirty logging has been stopped, dropping those | |
8900 | * which can be collapsed into a single large-page spte. Later | |
8901 | * page faults will create the large-page sptes. | |
8902 | */ | |
8903 | if ((change != KVM_MR_DELETE) && | |
8904 | (old->flags & KVM_MEM_LOG_DIRTY_PAGES) && | |
8905 | !(new->flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8906 | kvm_mmu_zap_collapsible_sptes(kvm, new); | |
8907 | ||
c972f3b1 | 8908 | /* |
88178fd4 | 8909 | * Set up write protection and/or dirty logging for the new slot. |
c126d94f | 8910 | * |
88178fd4 KH |
8911 | * For KVM_MR_DELETE and KVM_MR_MOVE, the shadow pages of old slot have |
8912 | * been zapped so no dirty logging staff is needed for old slot. For | |
8913 | * KVM_MR_FLAGS_ONLY, the old slot is essentially the same one as the | |
8914 | * new and it's also covered when dealing with the new slot. | |
f36f3f28 PB |
8915 | * |
8916 | * FIXME: const-ify all uses of struct kvm_memory_slot. | |
c972f3b1 | 8917 | */ |
88178fd4 | 8918 | if (change != KVM_MR_DELETE) |
f36f3f28 | 8919 | kvm_mmu_slot_apply_flags(kvm, (struct kvm_memory_slot *) new); |
0de10343 | 8920 | } |
1d737c8a | 8921 | |
2df72e9b | 8922 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
34d4cb8f | 8923 | { |
6ca18b69 | 8924 | kvm_mmu_invalidate_zap_all_pages(kvm); |
34d4cb8f MT |
8925 | } |
8926 | ||
2df72e9b MT |
8927 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
8928 | struct kvm_memory_slot *slot) | |
8929 | { | |
ae7cd873 | 8930 | kvm_page_track_flush_slot(kvm, slot); |
2df72e9b MT |
8931 | } |
8932 | ||
5d9bc648 PB |
8933 | static inline bool kvm_vcpu_has_events(struct kvm_vcpu *vcpu) |
8934 | { | |
8935 | if (!list_empty_careful(&vcpu->async_pf.done)) | |
8936 | return true; | |
8937 | ||
8938 | if (kvm_apic_has_events(vcpu)) | |
8939 | return true; | |
8940 | ||
8941 | if (vcpu->arch.pv.pv_unhalted) | |
8942 | return true; | |
8943 | ||
a5f01f8e WL |
8944 | if (vcpu->arch.exception.pending) |
8945 | return true; | |
8946 | ||
47a66eed Z |
8947 | if (kvm_test_request(KVM_REQ_NMI, vcpu) || |
8948 | (vcpu->arch.nmi_pending && | |
8949 | kvm_x86_ops->nmi_allowed(vcpu))) | |
5d9bc648 PB |
8950 | return true; |
8951 | ||
47a66eed Z |
8952 | if (kvm_test_request(KVM_REQ_SMI, vcpu) || |
8953 | (vcpu->arch.smi_pending && !is_smm(vcpu))) | |
73917739 PB |
8954 | return true; |
8955 | ||
5d9bc648 PB |
8956 | if (kvm_arch_interrupt_allowed(vcpu) && |
8957 | kvm_cpu_has_interrupt(vcpu)) | |
8958 | return true; | |
8959 | ||
1f4b34f8 AS |
8960 | if (kvm_hv_has_stimer_pending(vcpu)) |
8961 | return true; | |
8962 | ||
5d9bc648 PB |
8963 | return false; |
8964 | } | |
8965 | ||
1d737c8a ZX |
8966 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
8967 | { | |
5d9bc648 | 8968 | return kvm_vcpu_running(vcpu) || kvm_vcpu_has_events(vcpu); |
1d737c8a | 8969 | } |
5736199a | 8970 | |
199b5763 LM |
8971 | bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu) |
8972 | { | |
de63ad4c | 8973 | return vcpu->arch.preempted_in_kernel; |
199b5763 LM |
8974 | } |
8975 | ||
b6d33834 | 8976 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
5736199a | 8977 | { |
b6d33834 | 8978 | return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; |
5736199a | 8979 | } |
78646121 GN |
8980 | |
8981 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
8982 | { | |
8983 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
8984 | } | |
229456fc | 8985 | |
82b32774 | 8986 | unsigned long kvm_get_linear_rip(struct kvm_vcpu *vcpu) |
f92653ee | 8987 | { |
82b32774 NA |
8988 | if (is_64_bit_mode(vcpu)) |
8989 | return kvm_rip_read(vcpu); | |
8990 | return (u32)(get_segment_base(vcpu, VCPU_SREG_CS) + | |
8991 | kvm_rip_read(vcpu)); | |
8992 | } | |
8993 | EXPORT_SYMBOL_GPL(kvm_get_linear_rip); | |
f92653ee | 8994 | |
82b32774 NA |
8995 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
8996 | { | |
8997 | return kvm_get_linear_rip(vcpu) == linear_rip; | |
f92653ee JK |
8998 | } |
8999 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); | |
9000 | ||
94fe45da JK |
9001 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
9002 | { | |
9003 | unsigned long rflags; | |
9004 | ||
9005 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
9006 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
c310bac5 | 9007 | rflags &= ~X86_EFLAGS_TF; |
94fe45da JK |
9008 | return rflags; |
9009 | } | |
9010 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
9011 | ||
6addfc42 | 9012 | static void __kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) |
94fe45da JK |
9013 | { |
9014 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
f92653ee | 9015 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
c310bac5 | 9016 | rflags |= X86_EFLAGS_TF; |
94fe45da | 9017 | kvm_x86_ops->set_rflags(vcpu, rflags); |
6addfc42 PB |
9018 | } |
9019 | ||
9020 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
9021 | { | |
9022 | __kvm_set_rflags(vcpu, rflags); | |
3842d135 | 9023 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
94fe45da JK |
9024 | } |
9025 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
9026 | ||
56028d08 GN |
9027 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work) |
9028 | { | |
9029 | int r; | |
9030 | ||
fb67e14f | 9031 | if ((vcpu->arch.mmu.direct_map != work->arch.direct_map) || |
f2e10669 | 9032 | work->wakeup_all) |
56028d08 GN |
9033 | return; |
9034 | ||
9035 | r = kvm_mmu_reload(vcpu); | |
9036 | if (unlikely(r)) | |
9037 | return; | |
9038 | ||
fb67e14f XG |
9039 | if (!vcpu->arch.mmu.direct_map && |
9040 | work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu)) | |
9041 | return; | |
9042 | ||
56028d08 GN |
9043 | vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true); |
9044 | } | |
9045 | ||
af585b92 GN |
9046 | static inline u32 kvm_async_pf_hash_fn(gfn_t gfn) |
9047 | { | |
9048 | return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU)); | |
9049 | } | |
9050 | ||
9051 | static inline u32 kvm_async_pf_next_probe(u32 key) | |
9052 | { | |
9053 | return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1); | |
9054 | } | |
9055 | ||
9056 | static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
9057 | { | |
9058 | u32 key = kvm_async_pf_hash_fn(gfn); | |
9059 | ||
9060 | while (vcpu->arch.apf.gfns[key] != ~0) | |
9061 | key = kvm_async_pf_next_probe(key); | |
9062 | ||
9063 | vcpu->arch.apf.gfns[key] = gfn; | |
9064 | } | |
9065 | ||
9066 | static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn) | |
9067 | { | |
9068 | int i; | |
9069 | u32 key = kvm_async_pf_hash_fn(gfn); | |
9070 | ||
9071 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) && | |
c7d28c24 XG |
9072 | (vcpu->arch.apf.gfns[key] != gfn && |
9073 | vcpu->arch.apf.gfns[key] != ~0); i++) | |
af585b92 GN |
9074 | key = kvm_async_pf_next_probe(key); |
9075 | ||
9076 | return key; | |
9077 | } | |
9078 | ||
9079 | bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
9080 | { | |
9081 | return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn; | |
9082 | } | |
9083 | ||
9084 | static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
9085 | { | |
9086 | u32 i, j, k; | |
9087 | ||
9088 | i = j = kvm_async_pf_gfn_slot(vcpu, gfn); | |
9089 | while (true) { | |
9090 | vcpu->arch.apf.gfns[i] = ~0; | |
9091 | do { | |
9092 | j = kvm_async_pf_next_probe(j); | |
9093 | if (vcpu->arch.apf.gfns[j] == ~0) | |
9094 | return; | |
9095 | k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]); | |
9096 | /* | |
9097 | * k lies cyclically in ]i,j] | |
9098 | * | i.k.j | | |
9099 | * |....j i.k.| or |.k..j i...| | |
9100 | */ | |
9101 | } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j)); | |
9102 | vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j]; | |
9103 | i = j; | |
9104 | } | |
9105 | } | |
9106 | ||
7c90705b GN |
9107 | static int apf_put_user(struct kvm_vcpu *vcpu, u32 val) |
9108 | { | |
4e335d9e PB |
9109 | |
9110 | return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val, | |
9111 | sizeof(val)); | |
7c90705b GN |
9112 | } |
9113 | ||
9a6e7c39 WL |
9114 | static int apf_get_user(struct kvm_vcpu *vcpu, u32 *val) |
9115 | { | |
9116 | ||
9117 | return kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, val, | |
9118 | sizeof(u32)); | |
9119 | } | |
9120 | ||
af585b92 GN |
9121 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
9122 | struct kvm_async_pf *work) | |
9123 | { | |
6389ee94 AK |
9124 | struct x86_exception fault; |
9125 | ||
7c90705b | 9126 | trace_kvm_async_pf_not_present(work->arch.token, work->gva); |
af585b92 | 9127 | kvm_add_async_pf_gfn(vcpu, work->arch.gfn); |
7c90705b GN |
9128 | |
9129 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) || | |
fc5f06fa GN |
9130 | (vcpu->arch.apf.send_user_only && |
9131 | kvm_x86_ops->get_cpl(vcpu) == 0)) | |
7c90705b GN |
9132 | kvm_make_request(KVM_REQ_APF_HALT, vcpu); |
9133 | else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) { | |
6389ee94 AK |
9134 | fault.vector = PF_VECTOR; |
9135 | fault.error_code_valid = true; | |
9136 | fault.error_code = 0; | |
9137 | fault.nested_page_fault = false; | |
9138 | fault.address = work->arch.token; | |
adfe20fb | 9139 | fault.async_page_fault = true; |
6389ee94 | 9140 | kvm_inject_page_fault(vcpu, &fault); |
7c90705b | 9141 | } |
af585b92 GN |
9142 | } |
9143 | ||
9144 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
9145 | struct kvm_async_pf *work) | |
9146 | { | |
6389ee94 | 9147 | struct x86_exception fault; |
9a6e7c39 | 9148 | u32 val; |
6389ee94 | 9149 | |
f2e10669 | 9150 | if (work->wakeup_all) |
7c90705b GN |
9151 | work->arch.token = ~0; /* broadcast wakeup */ |
9152 | else | |
9153 | kvm_del_async_pf_gfn(vcpu, work->arch.gfn); | |
24dccf83 | 9154 | trace_kvm_async_pf_ready(work->arch.token, work->gva); |
7c90705b | 9155 | |
9a6e7c39 WL |
9156 | if (vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED && |
9157 | !apf_get_user(vcpu, &val)) { | |
9158 | if (val == KVM_PV_REASON_PAGE_NOT_PRESENT && | |
9159 | vcpu->arch.exception.pending && | |
9160 | vcpu->arch.exception.nr == PF_VECTOR && | |
9161 | !apf_put_user(vcpu, 0)) { | |
9162 | vcpu->arch.exception.injected = false; | |
9163 | vcpu->arch.exception.pending = false; | |
9164 | vcpu->arch.exception.nr = 0; | |
9165 | vcpu->arch.exception.has_error_code = false; | |
9166 | vcpu->arch.exception.error_code = 0; | |
9167 | } else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) { | |
9168 | fault.vector = PF_VECTOR; | |
9169 | fault.error_code_valid = true; | |
9170 | fault.error_code = 0; | |
9171 | fault.nested_page_fault = false; | |
9172 | fault.address = work->arch.token; | |
9173 | fault.async_page_fault = true; | |
9174 | kvm_inject_page_fault(vcpu, &fault); | |
9175 | } | |
7c90705b | 9176 | } |
e6d53e3b | 9177 | vcpu->arch.apf.halted = false; |
a4fa1635 | 9178 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
7c90705b GN |
9179 | } |
9180 | ||
9181 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
9182 | { | |
9183 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED)) | |
9184 | return true; | |
9185 | else | |
9bc1f09f | 9186 | return kvm_can_do_async_pf(vcpu); |
af585b92 GN |
9187 | } |
9188 | ||
5544eb9b PB |
9189 | void kvm_arch_start_assignment(struct kvm *kvm) |
9190 | { | |
9191 | atomic_inc(&kvm->arch.assigned_device_count); | |
9192 | } | |
9193 | EXPORT_SYMBOL_GPL(kvm_arch_start_assignment); | |
9194 | ||
9195 | void kvm_arch_end_assignment(struct kvm *kvm) | |
9196 | { | |
9197 | atomic_dec(&kvm->arch.assigned_device_count); | |
9198 | } | |
9199 | EXPORT_SYMBOL_GPL(kvm_arch_end_assignment); | |
9200 | ||
9201 | bool kvm_arch_has_assigned_device(struct kvm *kvm) | |
9202 | { | |
9203 | return atomic_read(&kvm->arch.assigned_device_count); | |
9204 | } | |
9205 | EXPORT_SYMBOL_GPL(kvm_arch_has_assigned_device); | |
9206 | ||
e0f0bbc5 AW |
9207 | void kvm_arch_register_noncoherent_dma(struct kvm *kvm) |
9208 | { | |
9209 | atomic_inc(&kvm->arch.noncoherent_dma_count); | |
9210 | } | |
9211 | EXPORT_SYMBOL_GPL(kvm_arch_register_noncoherent_dma); | |
9212 | ||
9213 | void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm) | |
9214 | { | |
9215 | atomic_dec(&kvm->arch.noncoherent_dma_count); | |
9216 | } | |
9217 | EXPORT_SYMBOL_GPL(kvm_arch_unregister_noncoherent_dma); | |
9218 | ||
9219 | bool kvm_arch_has_noncoherent_dma(struct kvm *kvm) | |
9220 | { | |
9221 | return atomic_read(&kvm->arch.noncoherent_dma_count); | |
9222 | } | |
9223 | EXPORT_SYMBOL_GPL(kvm_arch_has_noncoherent_dma); | |
9224 | ||
14717e20 AW |
9225 | bool kvm_arch_has_irq_bypass(void) |
9226 | { | |
9227 | return kvm_x86_ops->update_pi_irte != NULL; | |
9228 | } | |
9229 | ||
87276880 FW |
9230 | int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons, |
9231 | struct irq_bypass_producer *prod) | |
9232 | { | |
9233 | struct kvm_kernel_irqfd *irqfd = | |
9234 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
9235 | ||
14717e20 | 9236 | irqfd->producer = prod; |
87276880 | 9237 | |
14717e20 AW |
9238 | return kvm_x86_ops->update_pi_irte(irqfd->kvm, |
9239 | prod->irq, irqfd->gsi, 1); | |
87276880 FW |
9240 | } |
9241 | ||
9242 | void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons, | |
9243 | struct irq_bypass_producer *prod) | |
9244 | { | |
9245 | int ret; | |
9246 | struct kvm_kernel_irqfd *irqfd = | |
9247 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
9248 | ||
87276880 FW |
9249 | WARN_ON(irqfd->producer != prod); |
9250 | irqfd->producer = NULL; | |
9251 | ||
9252 | /* | |
9253 | * When producer of consumer is unregistered, we change back to | |
9254 | * remapped mode, so we can re-use the current implementation | |
bb3541f1 | 9255 | * when the irq is masked/disabled or the consumer side (KVM |
87276880 FW |
9256 | * int this case doesn't want to receive the interrupts. |
9257 | */ | |
9258 | ret = kvm_x86_ops->update_pi_irte(irqfd->kvm, prod->irq, irqfd->gsi, 0); | |
9259 | if (ret) | |
9260 | printk(KERN_INFO "irq bypass consumer (token %p) unregistration" | |
9261 | " fails: %d\n", irqfd->consumer.token, ret); | |
9262 | } | |
9263 | ||
9264 | int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq, | |
9265 | uint32_t guest_irq, bool set) | |
9266 | { | |
9267 | if (!kvm_x86_ops->update_pi_irte) | |
9268 | return -EINVAL; | |
9269 | ||
9270 | return kvm_x86_ops->update_pi_irte(kvm, host_irq, guest_irq, set); | |
9271 | } | |
9272 | ||
52004014 FW |
9273 | bool kvm_vector_hashing_enabled(void) |
9274 | { | |
9275 | return vector_hashing; | |
9276 | } | |
9277 | EXPORT_SYMBOL_GPL(kvm_vector_hashing_enabled); | |
9278 | ||
229456fc | 9279 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
931c33b1 | 9280 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_fast_mmio); |
229456fc MT |
9281 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); |
9282 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
9283 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
9284 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 9285 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 9286 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 9287 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 9288 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 9289 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 9290 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
2e554e8d | 9291 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |
489223ed | 9292 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_write_tsc_offset); |
7b46268d | 9293 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ple_window); |
843e4330 | 9294 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pml_full); |
efc64404 | 9295 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pi_irte_update); |
18f40c53 SS |
9296 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_unaccelerated_access); |
9297 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_incomplete_ipi); |