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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 | ||
4c27625b | 117 | unsigned int min_timer_period_us = 200; |
9ed96e87 MT |
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 */ |
3b8a5df6 | 139 | unsigned int __read_mostly lapic_timer_advance_ns = 1000; |
d0659d94 | 140 | module_param(lapic_timer_advance_ns, uint, S_IRUGO | S_IWUSR); |
c5ce8235 | 141 | EXPORT_SYMBOL_GPL(lapic_timer_advance_ns); |
d0659d94 | 142 | |
52004014 FW |
143 | static bool __read_mostly vector_hashing = true; |
144 | module_param(vector_hashing, bool, S_IRUGO); | |
145 | ||
c4ae60e4 LA |
146 | bool __read_mostly enable_vmware_backdoor = false; |
147 | module_param(enable_vmware_backdoor, bool, S_IRUGO); | |
148 | EXPORT_SYMBOL_GPL(enable_vmware_backdoor); | |
149 | ||
6c86eedc WL |
150 | static bool __read_mostly force_emulation_prefix = false; |
151 | module_param(force_emulation_prefix, bool, S_IRUGO); | |
152 | ||
18863bdd AK |
153 | #define KVM_NR_SHARED_MSRS 16 |
154 | ||
155 | struct kvm_shared_msrs_global { | |
156 | int nr; | |
2bf78fa7 | 157 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
158 | }; |
159 | ||
160 | struct kvm_shared_msrs { | |
161 | struct user_return_notifier urn; | |
162 | bool registered; | |
2bf78fa7 SY |
163 | struct kvm_shared_msr_values { |
164 | u64 host; | |
165 | u64 curr; | |
166 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
167 | }; |
168 | ||
169 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
013f6a5d | 170 | static struct kvm_shared_msrs __percpu *shared_msrs; |
18863bdd | 171 | |
417bc304 | 172 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
173 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
174 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
175 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
176 | { "invlpg", VCPU_STAT(invlpg) }, | |
177 | { "exits", VCPU_STAT(exits) }, | |
178 | { "io_exits", VCPU_STAT(io_exits) }, | |
179 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
180 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
181 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 182 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 | 183 | { "halt_exits", VCPU_STAT(halt_exits) }, |
f7819512 | 184 | { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, |
62bea5bf | 185 | { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) }, |
3491caf2 | 186 | { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) }, |
ba1389b7 | 187 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f11c3a8d | 188 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
189 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
190 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
191 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
ba1389b7 AK |
192 | { "fpu_reload", VCPU_STAT(fpu_reload) }, |
193 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
194 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 195 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 196 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
0f1e261e | 197 | { "req_event", VCPU_STAT(req_event) }, |
c595ceee | 198 | { "l1d_flush", VCPU_STAT(l1d_flush) }, |
4cee5764 AK |
199 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
200 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
201 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
202 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
203 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
204 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 205 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 206 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 207 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 208 | { "largepages", VM_STAT(lpages) }, |
f3414bc7 DM |
209 | { "max_mmu_page_hash_collisions", |
210 | VM_STAT(max_mmu_page_hash_collisions) }, | |
417bc304 HB |
211 | { NULL } |
212 | }; | |
213 | ||
2acf923e DC |
214 | u64 __read_mostly host_xcr0; |
215 | ||
b6785def | 216 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt); |
d6aa1000 | 217 | |
af585b92 GN |
218 | static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu) |
219 | { | |
220 | int i; | |
221 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU); i++) | |
222 | vcpu->arch.apf.gfns[i] = ~0; | |
223 | } | |
224 | ||
18863bdd AK |
225 | static void kvm_on_user_return(struct user_return_notifier *urn) |
226 | { | |
227 | unsigned slot; | |
18863bdd AK |
228 | struct kvm_shared_msrs *locals |
229 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 230 | struct kvm_shared_msr_values *values; |
1650b4eb IA |
231 | unsigned long flags; |
232 | ||
233 | /* | |
234 | * Disabling irqs at this point since the following code could be | |
235 | * interrupted and executed through kvm_arch_hardware_disable() | |
236 | */ | |
237 | local_irq_save(flags); | |
238 | if (locals->registered) { | |
239 | locals->registered = false; | |
240 | user_return_notifier_unregister(urn); | |
241 | } | |
242 | local_irq_restore(flags); | |
18863bdd | 243 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { |
2bf78fa7 SY |
244 | values = &locals->values[slot]; |
245 | if (values->host != values->curr) { | |
246 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
247 | values->curr = values->host; | |
18863bdd AK |
248 | } |
249 | } | |
18863bdd AK |
250 | } |
251 | ||
2bf78fa7 | 252 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 253 | { |
18863bdd | 254 | u64 value; |
013f6a5d MT |
255 | unsigned int cpu = smp_processor_id(); |
256 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
18863bdd | 257 | |
2bf78fa7 SY |
258 | /* only read, and nobody should modify it at this time, |
259 | * so don't need lock */ | |
260 | if (slot >= shared_msrs_global.nr) { | |
261 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
262 | return; | |
263 | } | |
264 | rdmsrl_safe(msr, &value); | |
265 | smsr->values[slot].host = value; | |
266 | smsr->values[slot].curr = value; | |
267 | } | |
268 | ||
269 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
270 | { | |
0123be42 | 271 | BUG_ON(slot >= KVM_NR_SHARED_MSRS); |
c847fe88 | 272 | shared_msrs_global.msrs[slot] = msr; |
18863bdd AK |
273 | if (slot >= shared_msrs_global.nr) |
274 | shared_msrs_global.nr = slot + 1; | |
18863bdd AK |
275 | } |
276 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
277 | ||
278 | static void kvm_shared_msr_cpu_online(void) | |
279 | { | |
280 | unsigned i; | |
18863bdd AK |
281 | |
282 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 283 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
284 | } |
285 | ||
8b3c3104 | 286 | int kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd | 287 | { |
013f6a5d MT |
288 | unsigned int cpu = smp_processor_id(); |
289 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
8b3c3104 | 290 | int err; |
18863bdd | 291 | |
2bf78fa7 | 292 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
8b3c3104 | 293 | return 0; |
2bf78fa7 | 294 | smsr->values[slot].curr = value; |
8b3c3104 AH |
295 | err = wrmsrl_safe(shared_msrs_global.msrs[slot], value); |
296 | if (err) | |
297 | return 1; | |
298 | ||
18863bdd AK |
299 | if (!smsr->registered) { |
300 | smsr->urn.on_user_return = kvm_on_user_return; | |
301 | user_return_notifier_register(&smsr->urn); | |
302 | smsr->registered = true; | |
303 | } | |
8b3c3104 | 304 | return 0; |
18863bdd AK |
305 | } |
306 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
307 | ||
13a34e06 | 308 | static void drop_user_return_notifiers(void) |
3548bab5 | 309 | { |
013f6a5d MT |
310 | unsigned int cpu = smp_processor_id(); |
311 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
3548bab5 AK |
312 | |
313 | if (smsr->registered) | |
314 | kvm_on_user_return(&smsr->urn); | |
315 | } | |
316 | ||
6866b83e CO |
317 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
318 | { | |
8a5a87d9 | 319 | return vcpu->arch.apic_base; |
6866b83e CO |
320 | } |
321 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
322 | ||
58871649 JM |
323 | enum lapic_mode kvm_get_apic_mode(struct kvm_vcpu *vcpu) |
324 | { | |
325 | return kvm_apic_mode(kvm_get_apic_base(vcpu)); | |
326 | } | |
327 | EXPORT_SYMBOL_GPL(kvm_get_apic_mode); | |
328 | ||
58cb628d JK |
329 | int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
330 | { | |
58871649 JM |
331 | enum lapic_mode old_mode = kvm_get_apic_mode(vcpu); |
332 | enum lapic_mode new_mode = kvm_apic_mode(msr_info->data); | |
d6321d49 RK |
333 | u64 reserved_bits = ((~0ULL) << cpuid_maxphyaddr(vcpu)) | 0x2ff | |
334 | (guest_cpuid_has(vcpu, X86_FEATURE_X2APIC) ? 0 : X2APIC_ENABLE); | |
58cb628d | 335 | |
58871649 | 336 | if ((msr_info->data & reserved_bits) != 0 || new_mode == LAPIC_MODE_INVALID) |
58cb628d | 337 | return 1; |
58871649 JM |
338 | if (!msr_info->host_initiated) { |
339 | if (old_mode == LAPIC_MODE_X2APIC && new_mode == LAPIC_MODE_XAPIC) | |
340 | return 1; | |
341 | if (old_mode == LAPIC_MODE_DISABLED && new_mode == LAPIC_MODE_X2APIC) | |
342 | return 1; | |
343 | } | |
58cb628d JK |
344 | |
345 | kvm_lapic_set_base(vcpu, msr_info->data); | |
346 | return 0; | |
6866b83e CO |
347 | } |
348 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
349 | ||
2605fc21 | 350 | asmlinkage __visible void kvm_spurious_fault(void) |
e3ba45b8 GL |
351 | { |
352 | /* Fault while not rebooting. We want the trace. */ | |
353 | BUG(); | |
354 | } | |
355 | EXPORT_SYMBOL_GPL(kvm_spurious_fault); | |
356 | ||
3fd28fce ED |
357 | #define EXCPT_BENIGN 0 |
358 | #define EXCPT_CONTRIBUTORY 1 | |
359 | #define EXCPT_PF 2 | |
360 | ||
361 | static int exception_class(int vector) | |
362 | { | |
363 | switch (vector) { | |
364 | case PF_VECTOR: | |
365 | return EXCPT_PF; | |
366 | case DE_VECTOR: | |
367 | case TS_VECTOR: | |
368 | case NP_VECTOR: | |
369 | case SS_VECTOR: | |
370 | case GP_VECTOR: | |
371 | return EXCPT_CONTRIBUTORY; | |
372 | default: | |
373 | break; | |
374 | } | |
375 | return EXCPT_BENIGN; | |
376 | } | |
377 | ||
d6e8c854 NA |
378 | #define EXCPT_FAULT 0 |
379 | #define EXCPT_TRAP 1 | |
380 | #define EXCPT_ABORT 2 | |
381 | #define EXCPT_INTERRUPT 3 | |
382 | ||
383 | static int exception_type(int vector) | |
384 | { | |
385 | unsigned int mask; | |
386 | ||
387 | if (WARN_ON(vector > 31 || vector == NMI_VECTOR)) | |
388 | return EXCPT_INTERRUPT; | |
389 | ||
390 | mask = 1 << vector; | |
391 | ||
392 | /* #DB is trap, as instruction watchpoints are handled elsewhere */ | |
393 | if (mask & ((1 << DB_VECTOR) | (1 << BP_VECTOR) | (1 << OF_VECTOR))) | |
394 | return EXCPT_TRAP; | |
395 | ||
396 | if (mask & ((1 << DF_VECTOR) | (1 << MC_VECTOR))) | |
397 | return EXCPT_ABORT; | |
398 | ||
399 | /* Reserved exceptions will result in fault */ | |
400 | return EXCPT_FAULT; | |
401 | } | |
402 | ||
da998b46 JM |
403 | void kvm_deliver_exception_payload(struct kvm_vcpu *vcpu) |
404 | { | |
405 | unsigned nr = vcpu->arch.exception.nr; | |
406 | bool has_payload = vcpu->arch.exception.has_payload; | |
407 | unsigned long payload = vcpu->arch.exception.payload; | |
408 | ||
409 | if (!has_payload) | |
410 | return; | |
411 | ||
412 | switch (nr) { | |
f10c729f JM |
413 | case DB_VECTOR: |
414 | /* | |
415 | * "Certain debug exceptions may clear bit 0-3. The | |
416 | * remaining contents of the DR6 register are never | |
417 | * cleared by the processor". | |
418 | */ | |
419 | vcpu->arch.dr6 &= ~DR_TRAP_BITS; | |
420 | /* | |
421 | * DR6.RTM is set by all #DB exceptions that don't clear it. | |
422 | */ | |
423 | vcpu->arch.dr6 |= DR6_RTM; | |
424 | vcpu->arch.dr6 |= payload; | |
425 | /* | |
426 | * Bit 16 should be set in the payload whenever the #DB | |
427 | * exception should clear DR6.RTM. This makes the payload | |
428 | * compatible with the pending debug exceptions under VMX. | |
429 | * Though not currently documented in the SDM, this also | |
430 | * makes the payload compatible with the exit qualification | |
431 | * for #DB exceptions under VMX. | |
432 | */ | |
433 | vcpu->arch.dr6 ^= payload & DR6_RTM; | |
434 | break; | |
da998b46 JM |
435 | case PF_VECTOR: |
436 | vcpu->arch.cr2 = payload; | |
437 | break; | |
438 | } | |
439 | ||
440 | vcpu->arch.exception.has_payload = false; | |
441 | vcpu->arch.exception.payload = 0; | |
442 | } | |
443 | EXPORT_SYMBOL_GPL(kvm_deliver_exception_payload); | |
444 | ||
3fd28fce | 445 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, |
ce7ddec4 | 446 | unsigned nr, bool has_error, u32 error_code, |
91e86d22 | 447 | bool has_payload, unsigned long payload, bool reinject) |
3fd28fce ED |
448 | { |
449 | u32 prev_nr; | |
450 | int class1, class2; | |
451 | ||
3842d135 AK |
452 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
453 | ||
664f8e26 | 454 | if (!vcpu->arch.exception.pending && !vcpu->arch.exception.injected) { |
3fd28fce | 455 | queue: |
3ffb2468 NA |
456 | if (has_error && !is_protmode(vcpu)) |
457 | has_error = false; | |
664f8e26 WL |
458 | if (reinject) { |
459 | /* | |
460 | * On vmentry, vcpu->arch.exception.pending is only | |
461 | * true if an event injection was blocked by | |
462 | * nested_run_pending. In that case, however, | |
463 | * vcpu_enter_guest requests an immediate exit, | |
464 | * and the guest shouldn't proceed far enough to | |
465 | * need reinjection. | |
466 | */ | |
467 | WARN_ON_ONCE(vcpu->arch.exception.pending); | |
468 | vcpu->arch.exception.injected = true; | |
91e86d22 JM |
469 | if (WARN_ON_ONCE(has_payload)) { |
470 | /* | |
471 | * A reinjected event has already | |
472 | * delivered its payload. | |
473 | */ | |
474 | has_payload = false; | |
475 | payload = 0; | |
476 | } | |
664f8e26 WL |
477 | } else { |
478 | vcpu->arch.exception.pending = true; | |
479 | vcpu->arch.exception.injected = false; | |
480 | } | |
3fd28fce ED |
481 | vcpu->arch.exception.has_error_code = has_error; |
482 | vcpu->arch.exception.nr = nr; | |
483 | vcpu->arch.exception.error_code = error_code; | |
91e86d22 JM |
484 | vcpu->arch.exception.has_payload = has_payload; |
485 | vcpu->arch.exception.payload = payload; | |
da998b46 JM |
486 | /* |
487 | * In guest mode, payload delivery should be deferred, | |
488 | * so that the L1 hypervisor can intercept #PF before | |
f10c729f JM |
489 | * CR2 is modified (or intercept #DB before DR6 is |
490 | * modified under nVMX). However, for ABI | |
491 | * compatibility with KVM_GET_VCPU_EVENTS and | |
492 | * KVM_SET_VCPU_EVENTS, we can't delay payload | |
493 | * delivery unless userspace has enabled this | |
494 | * functionality via the per-VM capability, | |
495 | * KVM_CAP_EXCEPTION_PAYLOAD. | |
da998b46 JM |
496 | */ |
497 | if (!vcpu->kvm->arch.exception_payload_enabled || | |
498 | !is_guest_mode(vcpu)) | |
499 | kvm_deliver_exception_payload(vcpu); | |
3fd28fce ED |
500 | return; |
501 | } | |
502 | ||
503 | /* to check exception */ | |
504 | prev_nr = vcpu->arch.exception.nr; | |
505 | if (prev_nr == DF_VECTOR) { | |
506 | /* triple fault -> shutdown */ | |
a8eeb04a | 507 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
3fd28fce ED |
508 | return; |
509 | } | |
510 | class1 = exception_class(prev_nr); | |
511 | class2 = exception_class(nr); | |
512 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
513 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
664f8e26 WL |
514 | /* |
515 | * Generate double fault per SDM Table 5-5. Set | |
516 | * exception.pending = true so that the double fault | |
517 | * can trigger a nested vmexit. | |
518 | */ | |
3fd28fce | 519 | vcpu->arch.exception.pending = true; |
664f8e26 | 520 | vcpu->arch.exception.injected = false; |
3fd28fce ED |
521 | vcpu->arch.exception.has_error_code = true; |
522 | vcpu->arch.exception.nr = DF_VECTOR; | |
523 | vcpu->arch.exception.error_code = 0; | |
c851436a JM |
524 | vcpu->arch.exception.has_payload = false; |
525 | vcpu->arch.exception.payload = 0; | |
3fd28fce ED |
526 | } else |
527 | /* replace previous exception with a new one in a hope | |
528 | that instruction re-execution will regenerate lost | |
529 | exception */ | |
530 | goto queue; | |
531 | } | |
532 | ||
298101da AK |
533 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
534 | { | |
91e86d22 | 535 | kvm_multiple_exception(vcpu, nr, false, 0, false, 0, false); |
298101da AK |
536 | } |
537 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
538 | ||
ce7ddec4 JR |
539 | void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
540 | { | |
91e86d22 | 541 | kvm_multiple_exception(vcpu, nr, false, 0, false, 0, true); |
ce7ddec4 JR |
542 | } |
543 | EXPORT_SYMBOL_GPL(kvm_requeue_exception); | |
544 | ||
f10c729f JM |
545 | static void kvm_queue_exception_p(struct kvm_vcpu *vcpu, unsigned nr, |
546 | unsigned long payload) | |
547 | { | |
548 | kvm_multiple_exception(vcpu, nr, false, 0, true, payload, false); | |
549 | } | |
550 | ||
da998b46 JM |
551 | static void kvm_queue_exception_e_p(struct kvm_vcpu *vcpu, unsigned nr, |
552 | u32 error_code, unsigned long payload) | |
553 | { | |
554 | kvm_multiple_exception(vcpu, nr, true, error_code, | |
555 | true, payload, false); | |
556 | } | |
557 | ||
6affcbed | 558 | int kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err) |
c3c91fee | 559 | { |
db8fcefa AP |
560 | if (err) |
561 | kvm_inject_gp(vcpu, 0); | |
562 | else | |
6affcbed KH |
563 | return kvm_skip_emulated_instruction(vcpu); |
564 | ||
565 | return 1; | |
db8fcefa AP |
566 | } |
567 | EXPORT_SYMBOL_GPL(kvm_complete_insn_gp); | |
8df25a32 | 568 | |
6389ee94 | 569 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
c3c91fee AK |
570 | { |
571 | ++vcpu->stat.pf_guest; | |
adfe20fb WL |
572 | vcpu->arch.exception.nested_apf = |
573 | is_guest_mode(vcpu) && fault->async_page_fault; | |
da998b46 | 574 | if (vcpu->arch.exception.nested_apf) { |
adfe20fb | 575 | vcpu->arch.apf.nested_apf_token = fault->address; |
da998b46 JM |
576 | kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code); |
577 | } else { | |
578 | kvm_queue_exception_e_p(vcpu, PF_VECTOR, fault->error_code, | |
579 | fault->address); | |
580 | } | |
c3c91fee | 581 | } |
27d6c865 | 582 | EXPORT_SYMBOL_GPL(kvm_inject_page_fault); |
c3c91fee | 583 | |
ef54bcfe | 584 | static bool kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
d4f8cf66 | 585 | { |
6389ee94 AK |
586 | if (mmu_is_nested(vcpu) && !fault->nested_page_fault) |
587 | vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault); | |
d4f8cf66 | 588 | else |
44dd3ffa | 589 | vcpu->arch.mmu->inject_page_fault(vcpu, fault); |
ef54bcfe PB |
590 | |
591 | return fault->nested_page_fault; | |
d4f8cf66 JR |
592 | } |
593 | ||
3419ffc8 SY |
594 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
595 | { | |
7460fb4a AK |
596 | atomic_inc(&vcpu->arch.nmi_queued); |
597 | kvm_make_request(KVM_REQ_NMI, vcpu); | |
3419ffc8 SY |
598 | } |
599 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
600 | ||
298101da AK |
601 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
602 | { | |
91e86d22 | 603 | kvm_multiple_exception(vcpu, nr, true, error_code, false, 0, false); |
298101da AK |
604 | } |
605 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
606 | ||
ce7ddec4 JR |
607 | void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
608 | { | |
91e86d22 | 609 | kvm_multiple_exception(vcpu, nr, true, error_code, false, 0, true); |
ce7ddec4 JR |
610 | } |
611 | EXPORT_SYMBOL_GPL(kvm_requeue_exception_e); | |
612 | ||
0a79b009 AK |
613 | /* |
614 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
615 | * a #GP and return false. | |
616 | */ | |
617 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 618 | { |
0a79b009 AK |
619 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
620 | return true; | |
621 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
622 | return false; | |
298101da | 623 | } |
0a79b009 | 624 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 625 | |
16f8a6f9 NA |
626 | bool kvm_require_dr(struct kvm_vcpu *vcpu, int dr) |
627 | { | |
628 | if ((dr != 4 && dr != 5) || !kvm_read_cr4_bits(vcpu, X86_CR4_DE)) | |
629 | return true; | |
630 | ||
631 | kvm_queue_exception(vcpu, UD_VECTOR); | |
632 | return false; | |
633 | } | |
634 | EXPORT_SYMBOL_GPL(kvm_require_dr); | |
635 | ||
ec92fe44 JR |
636 | /* |
637 | * This function will be used to read from the physical memory of the currently | |
54bf36aa | 638 | * running guest. The difference to kvm_vcpu_read_guest_page is that this function |
ec92fe44 JR |
639 | * can read from guest physical or from the guest's guest physical memory. |
640 | */ | |
641 | int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, | |
642 | gfn_t ngfn, void *data, int offset, int len, | |
643 | u32 access) | |
644 | { | |
54987b7a | 645 | struct x86_exception exception; |
ec92fe44 JR |
646 | gfn_t real_gfn; |
647 | gpa_t ngpa; | |
648 | ||
649 | ngpa = gfn_to_gpa(ngfn); | |
54987b7a | 650 | real_gfn = mmu->translate_gpa(vcpu, ngpa, access, &exception); |
ec92fe44 JR |
651 | if (real_gfn == UNMAPPED_GVA) |
652 | return -EFAULT; | |
653 | ||
654 | real_gfn = gpa_to_gfn(real_gfn); | |
655 | ||
54bf36aa | 656 | return kvm_vcpu_read_guest_page(vcpu, real_gfn, data, offset, len); |
ec92fe44 JR |
657 | } |
658 | EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu); | |
659 | ||
69b0049a | 660 | static int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, |
3d06b8bf JR |
661 | void *data, int offset, int len, u32 access) |
662 | { | |
663 | return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn, | |
664 | data, offset, len, access); | |
665 | } | |
666 | ||
a03490ed CO |
667 | /* |
668 | * Load the pae pdptrs. Return true is they are all valid. | |
669 | */ | |
ff03a073 | 670 | int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3) |
a03490ed CO |
671 | { |
672 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
673 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
674 | int i; | |
675 | int ret; | |
ff03a073 | 676 | u64 pdpte[ARRAY_SIZE(mmu->pdptrs)]; |
a03490ed | 677 | |
ff03a073 JR |
678 | ret = kvm_read_guest_page_mmu(vcpu, mmu, pdpt_gfn, pdpte, |
679 | offset * sizeof(u64), sizeof(pdpte), | |
680 | PFERR_USER_MASK|PFERR_WRITE_MASK); | |
a03490ed CO |
681 | if (ret < 0) { |
682 | ret = 0; | |
683 | goto out; | |
684 | } | |
685 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
812f30b2 | 686 | if ((pdpte[i] & PT_PRESENT_MASK) && |
a0a64f50 | 687 | (pdpte[i] & |
44dd3ffa | 688 | vcpu->arch.mmu->guest_rsvd_check.rsvd_bits_mask[0][2])) { |
a03490ed CO |
689 | ret = 0; |
690 | goto out; | |
691 | } | |
692 | } | |
693 | ret = 1; | |
694 | ||
ff03a073 | 695 | memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs)); |
6de4f3ad AK |
696 | __set_bit(VCPU_EXREG_PDPTR, |
697 | (unsigned long *)&vcpu->arch.regs_avail); | |
698 | __set_bit(VCPU_EXREG_PDPTR, | |
699 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 700 | out: |
a03490ed CO |
701 | |
702 | return ret; | |
703 | } | |
cc4b6871 | 704 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 705 | |
9ed38ffa | 706 | bool pdptrs_changed(struct kvm_vcpu *vcpu) |
d835dfec | 707 | { |
ff03a073 | 708 | u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)]; |
d835dfec | 709 | bool changed = true; |
3d06b8bf JR |
710 | int offset; |
711 | gfn_t gfn; | |
d835dfec AK |
712 | int r; |
713 | ||
d35b34a9 | 714 | if (is_long_mode(vcpu) || !is_pae(vcpu) || !is_paging(vcpu)) |
d835dfec AK |
715 | return false; |
716 | ||
6de4f3ad AK |
717 | if (!test_bit(VCPU_EXREG_PDPTR, |
718 | (unsigned long *)&vcpu->arch.regs_avail)) | |
719 | return true; | |
720 | ||
a512177e PB |
721 | gfn = (kvm_read_cr3(vcpu) & 0xffffffe0ul) >> PAGE_SHIFT; |
722 | offset = (kvm_read_cr3(vcpu) & 0xffffffe0ul) & (PAGE_SIZE - 1); | |
3d06b8bf JR |
723 | r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte), |
724 | PFERR_USER_MASK | PFERR_WRITE_MASK); | |
d835dfec AK |
725 | if (r < 0) |
726 | goto out; | |
ff03a073 | 727 | changed = memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 728 | out: |
d835dfec AK |
729 | |
730 | return changed; | |
731 | } | |
9ed38ffa | 732 | EXPORT_SYMBOL_GPL(pdptrs_changed); |
d835dfec | 733 | |
49a9b07e | 734 | int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed | 735 | { |
aad82703 | 736 | unsigned long old_cr0 = kvm_read_cr0(vcpu); |
d81135a5 | 737 | unsigned long update_bits = X86_CR0_PG | X86_CR0_WP; |
aad82703 | 738 | |
f9a48e6a AK |
739 | cr0 |= X86_CR0_ET; |
740 | ||
ab344828 | 741 | #ifdef CONFIG_X86_64 |
0f12244f GN |
742 | if (cr0 & 0xffffffff00000000UL) |
743 | return 1; | |
ab344828 GN |
744 | #endif |
745 | ||
746 | cr0 &= ~CR0_RESERVED_BITS; | |
a03490ed | 747 | |
0f12244f GN |
748 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) |
749 | return 1; | |
a03490ed | 750 | |
0f12244f GN |
751 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) |
752 | return 1; | |
a03490ed CO |
753 | |
754 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
755 | #ifdef CONFIG_X86_64 | |
f6801dff | 756 | if ((vcpu->arch.efer & EFER_LME)) { |
a03490ed CO |
757 | int cs_db, cs_l; |
758 | ||
0f12244f GN |
759 | if (!is_pae(vcpu)) |
760 | return 1; | |
a03490ed | 761 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
0f12244f GN |
762 | if (cs_l) |
763 | return 1; | |
a03490ed CO |
764 | } else |
765 | #endif | |
ff03a073 | 766 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
9f8fe504 | 767 | kvm_read_cr3(vcpu))) |
0f12244f | 768 | return 1; |
a03490ed CO |
769 | } |
770 | ||
ad756a16 MJ |
771 | if (!(cr0 & X86_CR0_PG) && kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE)) |
772 | return 1; | |
773 | ||
a03490ed | 774 | kvm_x86_ops->set_cr0(vcpu, cr0); |
a03490ed | 775 | |
d170c419 | 776 | if ((cr0 ^ old_cr0) & X86_CR0_PG) { |
e5f3f027 | 777 | kvm_clear_async_pf_completion_queue(vcpu); |
d170c419 LJ |
778 | kvm_async_pf_hash_reset(vcpu); |
779 | } | |
e5f3f027 | 780 | |
aad82703 SY |
781 | if ((cr0 ^ old_cr0) & update_bits) |
782 | kvm_mmu_reset_context(vcpu); | |
b18d5431 | 783 | |
879ae188 LE |
784 | if (((cr0 ^ old_cr0) & X86_CR0_CD) && |
785 | kvm_arch_has_noncoherent_dma(vcpu->kvm) && | |
786 | !kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED)) | |
b18d5431 XG |
787 | kvm_zap_gfn_range(vcpu->kvm, 0, ~0ULL); |
788 | ||
0f12244f GN |
789 | return 0; |
790 | } | |
2d3ad1f4 | 791 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 792 | |
2d3ad1f4 | 793 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 794 | { |
49a9b07e | 795 | (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f)); |
a03490ed | 796 | } |
2d3ad1f4 | 797 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 798 | |
42bdf991 MT |
799 | static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu) |
800 | { | |
801 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) && | |
802 | !vcpu->guest_xcr0_loaded) { | |
803 | /* kvm_set_xcr() also depends on this */ | |
476b7ada PB |
804 | if (vcpu->arch.xcr0 != host_xcr0) |
805 | xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0); | |
42bdf991 MT |
806 | vcpu->guest_xcr0_loaded = 1; |
807 | } | |
808 | } | |
809 | ||
810 | static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu) | |
811 | { | |
812 | if (vcpu->guest_xcr0_loaded) { | |
813 | if (vcpu->arch.xcr0 != host_xcr0) | |
814 | xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0); | |
815 | vcpu->guest_xcr0_loaded = 0; | |
816 | } | |
817 | } | |
818 | ||
69b0049a | 819 | static int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) |
2acf923e | 820 | { |
56c103ec LJ |
821 | u64 xcr0 = xcr; |
822 | u64 old_xcr0 = vcpu->arch.xcr0; | |
46c34cb0 | 823 | u64 valid_bits; |
2acf923e DC |
824 | |
825 | /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */ | |
826 | if (index != XCR_XFEATURE_ENABLED_MASK) | |
827 | return 1; | |
d91cab78 | 828 | if (!(xcr0 & XFEATURE_MASK_FP)) |
2acf923e | 829 | return 1; |
d91cab78 | 830 | if ((xcr0 & XFEATURE_MASK_YMM) && !(xcr0 & XFEATURE_MASK_SSE)) |
2acf923e | 831 | return 1; |
46c34cb0 PB |
832 | |
833 | /* | |
834 | * Do not allow the guest to set bits that we do not support | |
835 | * saving. However, xcr0 bit 0 is always set, even if the | |
836 | * emulated CPU does not support XSAVE (see fx_init). | |
837 | */ | |
d91cab78 | 838 | valid_bits = vcpu->arch.guest_supported_xcr0 | XFEATURE_MASK_FP; |
46c34cb0 | 839 | if (xcr0 & ~valid_bits) |
2acf923e | 840 | return 1; |
46c34cb0 | 841 | |
d91cab78 DH |
842 | if ((!(xcr0 & XFEATURE_MASK_BNDREGS)) != |
843 | (!(xcr0 & XFEATURE_MASK_BNDCSR))) | |
390bd528 LJ |
844 | return 1; |
845 | ||
d91cab78 DH |
846 | if (xcr0 & XFEATURE_MASK_AVX512) { |
847 | if (!(xcr0 & XFEATURE_MASK_YMM)) | |
612263b3 | 848 | return 1; |
d91cab78 | 849 | if ((xcr0 & XFEATURE_MASK_AVX512) != XFEATURE_MASK_AVX512) |
612263b3 CP |
850 | return 1; |
851 | } | |
2acf923e | 852 | vcpu->arch.xcr0 = xcr0; |
56c103ec | 853 | |
d91cab78 | 854 | if ((xcr0 ^ old_xcr0) & XFEATURE_MASK_EXTEND) |
56c103ec | 855 | kvm_update_cpuid(vcpu); |
2acf923e DC |
856 | return 0; |
857 | } | |
858 | ||
859 | int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) | |
860 | { | |
764bcbc5 Z |
861 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || |
862 | __kvm_set_xcr(vcpu, index, xcr)) { | |
2acf923e DC |
863 | kvm_inject_gp(vcpu, 0); |
864 | return 1; | |
865 | } | |
866 | return 0; | |
867 | } | |
868 | EXPORT_SYMBOL_GPL(kvm_set_xcr); | |
869 | ||
a83b29c6 | 870 | int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 871 | { |
fc78f519 | 872 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
0be0226f | 873 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE | |
b9baba86 | 874 | X86_CR4_SMEP | X86_CR4_SMAP | X86_CR4_PKE; |
0be0226f | 875 | |
0f12244f GN |
876 | if (cr4 & CR4_RESERVED_BITS) |
877 | return 1; | |
a03490ed | 878 | |
d6321d49 | 879 | if (!guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) && (cr4 & X86_CR4_OSXSAVE)) |
2acf923e DC |
880 | return 1; |
881 | ||
d6321d49 | 882 | if (!guest_cpuid_has(vcpu, X86_FEATURE_SMEP) && (cr4 & X86_CR4_SMEP)) |
2acf923e DC |
883 | return 1; |
884 | ||
d6321d49 | 885 | if (!guest_cpuid_has(vcpu, X86_FEATURE_SMAP) && (cr4 & X86_CR4_SMAP)) |
c68b734f YW |
886 | return 1; |
887 | ||
d6321d49 | 888 | if (!guest_cpuid_has(vcpu, X86_FEATURE_FSGSBASE) && (cr4 & X86_CR4_FSGSBASE)) |
97ec8c06 FW |
889 | return 1; |
890 | ||
d6321d49 | 891 | if (!guest_cpuid_has(vcpu, X86_FEATURE_PKU) && (cr4 & X86_CR4_PKE)) |
74dc2b4f YW |
892 | return 1; |
893 | ||
fd8cb433 | 894 | if (!guest_cpuid_has(vcpu, X86_FEATURE_LA57) && (cr4 & X86_CR4_LA57)) |
b9baba86 HH |
895 | return 1; |
896 | ||
ae3e61e1 PB |
897 | if (!guest_cpuid_has(vcpu, X86_FEATURE_UMIP) && (cr4 & X86_CR4_UMIP)) |
898 | return 1; | |
899 | ||
a03490ed | 900 | if (is_long_mode(vcpu)) { |
0f12244f GN |
901 | if (!(cr4 & X86_CR4_PAE)) |
902 | return 1; | |
a2edf57f AK |
903 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
904 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
9f8fe504 AK |
905 | && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
906 | kvm_read_cr3(vcpu))) | |
0f12244f GN |
907 | return 1; |
908 | ||
ad756a16 | 909 | if ((cr4 & X86_CR4_PCIDE) && !(old_cr4 & X86_CR4_PCIDE)) { |
d6321d49 | 910 | if (!guest_cpuid_has(vcpu, X86_FEATURE_PCID)) |
ad756a16 MJ |
911 | return 1; |
912 | ||
913 | /* PCID can not be enabled when cr3[11:0]!=000H or EFER.LMA=0 */ | |
914 | if ((kvm_read_cr3(vcpu) & X86_CR3_PCID_MASK) || !is_long_mode(vcpu)) | |
915 | return 1; | |
916 | } | |
917 | ||
5e1746d6 | 918 | if (kvm_x86_ops->set_cr4(vcpu, cr4)) |
0f12244f | 919 | return 1; |
a03490ed | 920 | |
ad756a16 MJ |
921 | if (((cr4 ^ old_cr4) & pdptr_bits) || |
922 | (!(cr4 & X86_CR4_PCIDE) && (old_cr4 & X86_CR4_PCIDE))) | |
aad82703 | 923 | kvm_mmu_reset_context(vcpu); |
0f12244f | 924 | |
b9baba86 | 925 | if ((cr4 ^ old_cr4) & (X86_CR4_OSXSAVE | X86_CR4_PKE)) |
00b27a3e | 926 | kvm_update_cpuid(vcpu); |
2acf923e | 927 | |
0f12244f GN |
928 | return 0; |
929 | } | |
2d3ad1f4 | 930 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 931 | |
2390218b | 932 | int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 933 | { |
ade61e28 | 934 | bool skip_tlb_flush = false; |
ac146235 | 935 | #ifdef CONFIG_X86_64 |
c19986fe JS |
936 | bool pcid_enabled = kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE); |
937 | ||
ade61e28 | 938 | if (pcid_enabled) { |
208320ba JS |
939 | skip_tlb_flush = cr3 & X86_CR3_PCID_NOFLUSH; |
940 | cr3 &= ~X86_CR3_PCID_NOFLUSH; | |
ade61e28 | 941 | } |
ac146235 | 942 | #endif |
9d88fca7 | 943 | |
9f8fe504 | 944 | if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) { |
956bf353 JS |
945 | if (!skip_tlb_flush) { |
946 | kvm_mmu_sync_roots(vcpu); | |
ade61e28 | 947 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
956bf353 | 948 | } |
0f12244f | 949 | return 0; |
d835dfec AK |
950 | } |
951 | ||
d1cd3ce9 | 952 | if (is_long_mode(vcpu) && |
a780a3ea | 953 | (cr3 & rsvd_bits(cpuid_maxphyaddr(vcpu), 63))) |
d1cd3ce9 YZ |
954 | return 1; |
955 | else if (is_pae(vcpu) && is_paging(vcpu) && | |
d9f89b88 | 956 | !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) |
346874c9 | 957 | return 1; |
a03490ed | 958 | |
ade61e28 | 959 | kvm_mmu_new_cr3(vcpu, cr3, skip_tlb_flush); |
0f12244f | 960 | vcpu->arch.cr3 = cr3; |
aff48baa | 961 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
7c390d35 | 962 | |
0f12244f GN |
963 | return 0; |
964 | } | |
2d3ad1f4 | 965 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 966 | |
eea1cff9 | 967 | int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed | 968 | { |
0f12244f GN |
969 | if (cr8 & CR8_RESERVED_BITS) |
970 | return 1; | |
35754c98 | 971 | if (lapic_in_kernel(vcpu)) |
a03490ed CO |
972 | kvm_lapic_set_tpr(vcpu, cr8); |
973 | else | |
ad312c7c | 974 | vcpu->arch.cr8 = cr8; |
0f12244f GN |
975 | return 0; |
976 | } | |
2d3ad1f4 | 977 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 978 | |
2d3ad1f4 | 979 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed | 980 | { |
35754c98 | 981 | if (lapic_in_kernel(vcpu)) |
a03490ed CO |
982 | return kvm_lapic_get_cr8(vcpu); |
983 | else | |
ad312c7c | 984 | return vcpu->arch.cr8; |
a03490ed | 985 | } |
2d3ad1f4 | 986 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 987 | |
ae561ede NA |
988 | static void kvm_update_dr0123(struct kvm_vcpu *vcpu) |
989 | { | |
990 | int i; | |
991 | ||
992 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) { | |
993 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
994 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
995 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_RELOAD; | |
996 | } | |
997 | } | |
998 | ||
73aaf249 JK |
999 | static void kvm_update_dr6(struct kvm_vcpu *vcpu) |
1000 | { | |
1001 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
1002 | kvm_x86_ops->set_dr6(vcpu, vcpu->arch.dr6); | |
1003 | } | |
1004 | ||
c8639010 JK |
1005 | static void kvm_update_dr7(struct kvm_vcpu *vcpu) |
1006 | { | |
1007 | unsigned long dr7; | |
1008 | ||
1009 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) | |
1010 | dr7 = vcpu->arch.guest_debug_dr7; | |
1011 | else | |
1012 | dr7 = vcpu->arch.dr7; | |
1013 | kvm_x86_ops->set_dr7(vcpu, dr7); | |
360b948d PB |
1014 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_BP_ENABLED; |
1015 | if (dr7 & DR7_BP_EN_MASK) | |
1016 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_BP_ENABLED; | |
c8639010 JK |
1017 | } |
1018 | ||
6f43ed01 NA |
1019 | static u64 kvm_dr6_fixed(struct kvm_vcpu *vcpu) |
1020 | { | |
1021 | u64 fixed = DR6_FIXED_1; | |
1022 | ||
d6321d49 | 1023 | if (!guest_cpuid_has(vcpu, X86_FEATURE_RTM)) |
6f43ed01 NA |
1024 | fixed |= DR6_RTM; |
1025 | return fixed; | |
1026 | } | |
1027 | ||
338dbc97 | 1028 | static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
020df079 GN |
1029 | { |
1030 | switch (dr) { | |
1031 | case 0 ... 3: | |
1032 | vcpu->arch.db[dr] = val; | |
1033 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
1034 | vcpu->arch.eff_db[dr] = val; | |
1035 | break; | |
1036 | case 4: | |
020df079 GN |
1037 | /* fall through */ |
1038 | case 6: | |
338dbc97 GN |
1039 | if (val & 0xffffffff00000000ULL) |
1040 | return -1; /* #GP */ | |
6f43ed01 | 1041 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | kvm_dr6_fixed(vcpu); |
73aaf249 | 1042 | kvm_update_dr6(vcpu); |
020df079 GN |
1043 | break; |
1044 | case 5: | |
020df079 GN |
1045 | /* fall through */ |
1046 | default: /* 7 */ | |
338dbc97 GN |
1047 | if (val & 0xffffffff00000000ULL) |
1048 | return -1; /* #GP */ | |
020df079 | 1049 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; |
c8639010 | 1050 | kvm_update_dr7(vcpu); |
020df079 GN |
1051 | break; |
1052 | } | |
1053 | ||
1054 | return 0; | |
1055 | } | |
338dbc97 GN |
1056 | |
1057 | int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) | |
1058 | { | |
16f8a6f9 | 1059 | if (__kvm_set_dr(vcpu, dr, val)) { |
338dbc97 | 1060 | kvm_inject_gp(vcpu, 0); |
16f8a6f9 NA |
1061 | return 1; |
1062 | } | |
1063 | return 0; | |
338dbc97 | 1064 | } |
020df079 GN |
1065 | EXPORT_SYMBOL_GPL(kvm_set_dr); |
1066 | ||
16f8a6f9 | 1067 | int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) |
020df079 GN |
1068 | { |
1069 | switch (dr) { | |
1070 | case 0 ... 3: | |
1071 | *val = vcpu->arch.db[dr]; | |
1072 | break; | |
1073 | case 4: | |
020df079 GN |
1074 | /* fall through */ |
1075 | case 6: | |
73aaf249 JK |
1076 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
1077 | *val = vcpu->arch.dr6; | |
1078 | else | |
1079 | *val = kvm_x86_ops->get_dr6(vcpu); | |
020df079 GN |
1080 | break; |
1081 | case 5: | |
020df079 GN |
1082 | /* fall through */ |
1083 | default: /* 7 */ | |
1084 | *val = vcpu->arch.dr7; | |
1085 | break; | |
1086 | } | |
338dbc97 GN |
1087 | return 0; |
1088 | } | |
020df079 GN |
1089 | EXPORT_SYMBOL_GPL(kvm_get_dr); |
1090 | ||
022cd0e8 AK |
1091 | bool kvm_rdpmc(struct kvm_vcpu *vcpu) |
1092 | { | |
1093 | u32 ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
1094 | u64 data; | |
1095 | int err; | |
1096 | ||
c6702c9d | 1097 | err = kvm_pmu_rdpmc(vcpu, ecx, &data); |
022cd0e8 AK |
1098 | if (err) |
1099 | return err; | |
1100 | kvm_register_write(vcpu, VCPU_REGS_RAX, (u32)data); | |
1101 | kvm_register_write(vcpu, VCPU_REGS_RDX, data >> 32); | |
1102 | return err; | |
1103 | } | |
1104 | EXPORT_SYMBOL_GPL(kvm_rdpmc); | |
1105 | ||
043405e1 CO |
1106 | /* |
1107 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
1108 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
1109 | * | |
1110 | * This list is modified at module load time to reflect the | |
e3267cbb | 1111 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
62ef68bb PB |
1112 | * kvm-specific. Those are put in emulated_msrs; filtering of emulated_msrs |
1113 | * may depend on host virtualization features rather than host cpu features. | |
043405e1 | 1114 | */ |
e3267cbb | 1115 | |
043405e1 CO |
1116 | static u32 msrs_to_save[] = { |
1117 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
8c06585d | 1118 | MSR_STAR, |
043405e1 CO |
1119 | #ifdef CONFIG_X86_64 |
1120 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
1121 | #endif | |
b3897a49 | 1122 | MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA, |
9dbe6cf9 | 1123 | MSR_IA32_FEATURE_CONTROL, MSR_IA32_BNDCFGS, MSR_TSC_AUX, |
d28b387f | 1124 | MSR_IA32_SPEC_CTRL, MSR_IA32_ARCH_CAPABILITIES |
043405e1 CO |
1125 | }; |
1126 | ||
1127 | static unsigned num_msrs_to_save; | |
1128 | ||
62ef68bb PB |
1129 | static u32 emulated_msrs[] = { |
1130 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, | |
1131 | MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW, | |
1132 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, | |
1133 | HV_X64_MSR_TIME_REF_COUNT, HV_X64_MSR_REFERENCE_TSC, | |
72c139ba | 1134 | HV_X64_MSR_TSC_FREQUENCY, HV_X64_MSR_APIC_FREQUENCY, |
e7d9513b AS |
1135 | HV_X64_MSR_CRASH_P0, HV_X64_MSR_CRASH_P1, HV_X64_MSR_CRASH_P2, |
1136 | HV_X64_MSR_CRASH_P3, HV_X64_MSR_CRASH_P4, HV_X64_MSR_CRASH_CTL, | |
e516cebb | 1137 | HV_X64_MSR_RESET, |
11c4b1ca | 1138 | HV_X64_MSR_VP_INDEX, |
9eec50b8 | 1139 | HV_X64_MSR_VP_RUNTIME, |
5c919412 | 1140 | HV_X64_MSR_SCONTROL, |
1f4b34f8 | 1141 | HV_X64_MSR_STIMER0_CONFIG, |
d4abc577 | 1142 | HV_X64_MSR_VP_ASSIST_PAGE, |
a2e164e7 VK |
1143 | HV_X64_MSR_REENLIGHTENMENT_CONTROL, HV_X64_MSR_TSC_EMULATION_CONTROL, |
1144 | HV_X64_MSR_TSC_EMULATION_STATUS, | |
1145 | ||
1146 | MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME, | |
62ef68bb PB |
1147 | MSR_KVM_PV_EOI_EN, |
1148 | ||
ba904635 | 1149 | MSR_IA32_TSC_ADJUST, |
a3e06bbe | 1150 | MSR_IA32_TSCDEADLINE, |
043405e1 | 1151 | MSR_IA32_MISC_ENABLE, |
908e75f3 AK |
1152 | MSR_IA32_MCG_STATUS, |
1153 | MSR_IA32_MCG_CTL, | |
c45dcc71 | 1154 | MSR_IA32_MCG_EXT_CTL, |
64d60670 | 1155 | MSR_IA32_SMBASE, |
52797bf9 | 1156 | MSR_SMI_COUNT, |
db2336a8 KH |
1157 | MSR_PLATFORM_INFO, |
1158 | MSR_MISC_FEATURES_ENABLES, | |
bc226f07 | 1159 | MSR_AMD64_VIRT_SPEC_CTRL, |
043405e1 CO |
1160 | }; |
1161 | ||
62ef68bb PB |
1162 | static unsigned num_emulated_msrs; |
1163 | ||
801e459a TL |
1164 | /* |
1165 | * List of msr numbers which are used to expose MSR-based features that | |
1166 | * can be used by a hypervisor to validate requested CPU features. | |
1167 | */ | |
1168 | static u32 msr_based_features[] = { | |
1389309c PB |
1169 | MSR_IA32_VMX_BASIC, |
1170 | MSR_IA32_VMX_TRUE_PINBASED_CTLS, | |
1171 | MSR_IA32_VMX_PINBASED_CTLS, | |
1172 | MSR_IA32_VMX_TRUE_PROCBASED_CTLS, | |
1173 | MSR_IA32_VMX_PROCBASED_CTLS, | |
1174 | MSR_IA32_VMX_TRUE_EXIT_CTLS, | |
1175 | MSR_IA32_VMX_EXIT_CTLS, | |
1176 | MSR_IA32_VMX_TRUE_ENTRY_CTLS, | |
1177 | MSR_IA32_VMX_ENTRY_CTLS, | |
1178 | MSR_IA32_VMX_MISC, | |
1179 | MSR_IA32_VMX_CR0_FIXED0, | |
1180 | MSR_IA32_VMX_CR0_FIXED1, | |
1181 | MSR_IA32_VMX_CR4_FIXED0, | |
1182 | MSR_IA32_VMX_CR4_FIXED1, | |
1183 | MSR_IA32_VMX_VMCS_ENUM, | |
1184 | MSR_IA32_VMX_PROCBASED_CTLS2, | |
1185 | MSR_IA32_VMX_EPT_VPID_CAP, | |
1186 | MSR_IA32_VMX_VMFUNC, | |
1187 | ||
d1d93fa9 | 1188 | MSR_F10H_DECFG, |
518e7b94 | 1189 | MSR_IA32_UCODE_REV, |
cd283252 | 1190 | MSR_IA32_ARCH_CAPABILITIES, |
801e459a TL |
1191 | }; |
1192 | ||
1193 | static unsigned int num_msr_based_features; | |
1194 | ||
5b76a3cf PB |
1195 | u64 kvm_get_arch_capabilities(void) |
1196 | { | |
1197 | u64 data; | |
1198 | ||
1199 | rdmsrl_safe(MSR_IA32_ARCH_CAPABILITIES, &data); | |
1200 | ||
1201 | /* | |
1202 | * If we're doing cache flushes (either "always" or "cond") | |
1203 | * we will do one whenever the guest does a vmlaunch/vmresume. | |
1204 | * If an outer hypervisor is doing the cache flush for us | |
1205 | * (VMENTER_L1D_FLUSH_NESTED_VM), we can safely pass that | |
1206 | * capability to the guest too, and if EPT is disabled we're not | |
1207 | * vulnerable. Overall, only VMENTER_L1D_FLUSH_NEVER will | |
1208 | * require a nested hypervisor to do a flush of its own. | |
1209 | */ | |
1210 | if (l1tf_vmx_mitigation != VMENTER_L1D_FLUSH_NEVER) | |
1211 | data |= ARCH_CAP_SKIP_VMENTRY_L1DFLUSH; | |
1212 | ||
1213 | return data; | |
1214 | } | |
1215 | EXPORT_SYMBOL_GPL(kvm_get_arch_capabilities); | |
1216 | ||
66421c1e WL |
1217 | static int kvm_get_msr_feature(struct kvm_msr_entry *msr) |
1218 | { | |
1219 | switch (msr->index) { | |
cd283252 | 1220 | case MSR_IA32_ARCH_CAPABILITIES: |
5b76a3cf PB |
1221 | msr->data = kvm_get_arch_capabilities(); |
1222 | break; | |
1223 | case MSR_IA32_UCODE_REV: | |
cd283252 | 1224 | rdmsrl_safe(msr->index, &msr->data); |
518e7b94 | 1225 | break; |
66421c1e WL |
1226 | default: |
1227 | if (kvm_x86_ops->get_msr_feature(msr)) | |
1228 | return 1; | |
1229 | } | |
1230 | return 0; | |
1231 | } | |
1232 | ||
801e459a TL |
1233 | static int do_get_msr_feature(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1234 | { | |
1235 | struct kvm_msr_entry msr; | |
66421c1e | 1236 | int r; |
801e459a TL |
1237 | |
1238 | msr.index = index; | |
66421c1e WL |
1239 | r = kvm_get_msr_feature(&msr); |
1240 | if (r) | |
1241 | return r; | |
801e459a TL |
1242 | |
1243 | *data = msr.data; | |
1244 | ||
1245 | return 0; | |
1246 | } | |
1247 | ||
384bb783 | 1248 | bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer) |
15c4a640 | 1249 | { |
b69e8cae | 1250 | if (efer & efer_reserved_bits) |
384bb783 | 1251 | return false; |
15c4a640 | 1252 | |
1b4d56b8 | 1253 | if (efer & EFER_FFXSR && !guest_cpuid_has(vcpu, X86_FEATURE_FXSR_OPT)) |
384bb783 | 1254 | return false; |
1b2fd70c | 1255 | |
1b4d56b8 | 1256 | if (efer & EFER_SVME && !guest_cpuid_has(vcpu, X86_FEATURE_SVM)) |
384bb783 | 1257 | return false; |
d8017474 | 1258 | |
384bb783 JK |
1259 | return true; |
1260 | } | |
1261 | EXPORT_SYMBOL_GPL(kvm_valid_efer); | |
1262 | ||
1263 | static int set_efer(struct kvm_vcpu *vcpu, u64 efer) | |
1264 | { | |
1265 | u64 old_efer = vcpu->arch.efer; | |
1266 | ||
1267 | if (!kvm_valid_efer(vcpu, efer)) | |
1268 | return 1; | |
1269 | ||
1270 | if (is_paging(vcpu) | |
1271 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) | |
1272 | return 1; | |
1273 | ||
15c4a640 | 1274 | efer &= ~EFER_LMA; |
f6801dff | 1275 | efer |= vcpu->arch.efer & EFER_LMA; |
15c4a640 | 1276 | |
a3d204e2 SY |
1277 | kvm_x86_ops->set_efer(vcpu, efer); |
1278 | ||
aad82703 SY |
1279 | /* Update reserved bits */ |
1280 | if ((efer ^ old_efer) & EFER_NX) | |
1281 | kvm_mmu_reset_context(vcpu); | |
1282 | ||
b69e8cae | 1283 | return 0; |
15c4a640 CO |
1284 | } |
1285 | ||
f2b4b7dd JR |
1286 | void kvm_enable_efer_bits(u64 mask) |
1287 | { | |
1288 | efer_reserved_bits &= ~mask; | |
1289 | } | |
1290 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
1291 | ||
15c4a640 CO |
1292 | /* |
1293 | * Writes msr value into into the appropriate "register". | |
1294 | * Returns 0 on success, non-0 otherwise. | |
1295 | * Assumes vcpu_load() was already called. | |
1296 | */ | |
8fe8ab46 | 1297 | int kvm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
15c4a640 | 1298 | { |
854e8bb1 NA |
1299 | switch (msr->index) { |
1300 | case MSR_FS_BASE: | |
1301 | case MSR_GS_BASE: | |
1302 | case MSR_KERNEL_GS_BASE: | |
1303 | case MSR_CSTAR: | |
1304 | case MSR_LSTAR: | |
fd8cb433 | 1305 | if (is_noncanonical_address(msr->data, vcpu)) |
854e8bb1 NA |
1306 | return 1; |
1307 | break; | |
1308 | case MSR_IA32_SYSENTER_EIP: | |
1309 | case MSR_IA32_SYSENTER_ESP: | |
1310 | /* | |
1311 | * IA32_SYSENTER_ESP and IA32_SYSENTER_EIP cause #GP if | |
1312 | * non-canonical address is written on Intel but not on | |
1313 | * AMD (which ignores the top 32-bits, because it does | |
1314 | * not implement 64-bit SYSENTER). | |
1315 | * | |
1316 | * 64-bit code should hence be able to write a non-canonical | |
1317 | * value on AMD. Making the address canonical ensures that | |
1318 | * vmentry does not fail on Intel after writing a non-canonical | |
1319 | * value, and that something deterministic happens if the guest | |
1320 | * invokes 64-bit SYSENTER. | |
1321 | */ | |
fd8cb433 | 1322 | msr->data = get_canonical(msr->data, vcpu_virt_addr_bits(vcpu)); |
854e8bb1 | 1323 | } |
8fe8ab46 | 1324 | return kvm_x86_ops->set_msr(vcpu, msr); |
15c4a640 | 1325 | } |
854e8bb1 | 1326 | EXPORT_SYMBOL_GPL(kvm_set_msr); |
15c4a640 | 1327 | |
313a3dc7 CO |
1328 | /* |
1329 | * Adapt set_msr() to msr_io()'s calling convention | |
1330 | */ | |
609e36d3 PB |
1331 | static int do_get_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1332 | { | |
1333 | struct msr_data msr; | |
1334 | int r; | |
1335 | ||
1336 | msr.index = index; | |
1337 | msr.host_initiated = true; | |
1338 | r = kvm_get_msr(vcpu, &msr); | |
1339 | if (r) | |
1340 | return r; | |
1341 | ||
1342 | *data = msr.data; | |
1343 | return 0; | |
1344 | } | |
1345 | ||
313a3dc7 CO |
1346 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1347 | { | |
8fe8ab46 WA |
1348 | struct msr_data msr; |
1349 | ||
1350 | msr.data = *data; | |
1351 | msr.index = index; | |
1352 | msr.host_initiated = true; | |
1353 | return kvm_set_msr(vcpu, &msr); | |
313a3dc7 CO |
1354 | } |
1355 | ||
16e8d74d MT |
1356 | #ifdef CONFIG_X86_64 |
1357 | struct pvclock_gtod_data { | |
1358 | seqcount_t seq; | |
1359 | ||
1360 | struct { /* extract of a clocksource struct */ | |
1361 | int vclock_mode; | |
a5a1d1c2 TG |
1362 | u64 cycle_last; |
1363 | u64 mask; | |
16e8d74d MT |
1364 | u32 mult; |
1365 | u32 shift; | |
1366 | } clock; | |
1367 | ||
cbcf2dd3 TG |
1368 | u64 boot_ns; |
1369 | u64 nsec_base; | |
55dd00a7 | 1370 | u64 wall_time_sec; |
16e8d74d MT |
1371 | }; |
1372 | ||
1373 | static struct pvclock_gtod_data pvclock_gtod_data; | |
1374 | ||
1375 | static void update_pvclock_gtod(struct timekeeper *tk) | |
1376 | { | |
1377 | struct pvclock_gtod_data *vdata = &pvclock_gtod_data; | |
cbcf2dd3 TG |
1378 | u64 boot_ns; |
1379 | ||
876e7881 | 1380 | boot_ns = ktime_to_ns(ktime_add(tk->tkr_mono.base, tk->offs_boot)); |
16e8d74d MT |
1381 | |
1382 | write_seqcount_begin(&vdata->seq); | |
1383 | ||
1384 | /* copy pvclock gtod data */ | |
876e7881 PZ |
1385 | vdata->clock.vclock_mode = tk->tkr_mono.clock->archdata.vclock_mode; |
1386 | vdata->clock.cycle_last = tk->tkr_mono.cycle_last; | |
1387 | vdata->clock.mask = tk->tkr_mono.mask; | |
1388 | vdata->clock.mult = tk->tkr_mono.mult; | |
1389 | vdata->clock.shift = tk->tkr_mono.shift; | |
16e8d74d | 1390 | |
cbcf2dd3 | 1391 | vdata->boot_ns = boot_ns; |
876e7881 | 1392 | vdata->nsec_base = tk->tkr_mono.xtime_nsec; |
16e8d74d | 1393 | |
55dd00a7 MT |
1394 | vdata->wall_time_sec = tk->xtime_sec; |
1395 | ||
16e8d74d MT |
1396 | write_seqcount_end(&vdata->seq); |
1397 | } | |
1398 | #endif | |
1399 | ||
bab5bb39 NK |
1400 | void kvm_set_pending_timer(struct kvm_vcpu *vcpu) |
1401 | { | |
1402 | /* | |
1403 | * Note: KVM_REQ_PENDING_TIMER is implicitly checked in | |
1404 | * vcpu_enter_guest. This function is only called from | |
1405 | * the physical CPU that is running vcpu. | |
1406 | */ | |
1407 | kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); | |
1408 | } | |
16e8d74d | 1409 | |
18068523 GOC |
1410 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
1411 | { | |
9ed3c444 AK |
1412 | int version; |
1413 | int r; | |
50d0a0f9 | 1414 | struct pvclock_wall_clock wc; |
87aeb54f | 1415 | struct timespec64 boot; |
18068523 GOC |
1416 | |
1417 | if (!wall_clock) | |
1418 | return; | |
1419 | ||
9ed3c444 AK |
1420 | r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version)); |
1421 | if (r) | |
1422 | return; | |
1423 | ||
1424 | if (version & 1) | |
1425 | ++version; /* first time write, random junk */ | |
1426 | ||
1427 | ++version; | |
18068523 | 1428 | |
1dab1345 NK |
1429 | if (kvm_write_guest(kvm, wall_clock, &version, sizeof(version))) |
1430 | return; | |
18068523 | 1431 | |
50d0a0f9 GH |
1432 | /* |
1433 | * The guest calculates current wall clock time by adding | |
34c238a1 | 1434 | * system time (updated by kvm_guest_time_update below) to the |
50d0a0f9 GH |
1435 | * wall clock specified here. guest system time equals host |
1436 | * system time for us, thus we must fill in host boot time here. | |
1437 | */ | |
87aeb54f | 1438 | getboottime64(&boot); |
50d0a0f9 | 1439 | |
4b648665 | 1440 | if (kvm->arch.kvmclock_offset) { |
87aeb54f AB |
1441 | struct timespec64 ts = ns_to_timespec64(kvm->arch.kvmclock_offset); |
1442 | boot = timespec64_sub(boot, ts); | |
4b648665 | 1443 | } |
87aeb54f | 1444 | wc.sec = (u32)boot.tv_sec; /* overflow in 2106 guest time */ |
50d0a0f9 GH |
1445 | wc.nsec = boot.tv_nsec; |
1446 | wc.version = version; | |
18068523 GOC |
1447 | |
1448 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
1449 | ||
1450 | version++; | |
1451 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
1452 | } |
1453 | ||
50d0a0f9 GH |
1454 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
1455 | { | |
b51012de PB |
1456 | do_shl32_div32(dividend, divisor); |
1457 | return dividend; | |
50d0a0f9 GH |
1458 | } |
1459 | ||
3ae13faa | 1460 | static void kvm_get_time_scale(uint64_t scaled_hz, uint64_t base_hz, |
5f4e3f88 | 1461 | s8 *pshift, u32 *pmultiplier) |
50d0a0f9 | 1462 | { |
5f4e3f88 | 1463 | uint64_t scaled64; |
50d0a0f9 GH |
1464 | int32_t shift = 0; |
1465 | uint64_t tps64; | |
1466 | uint32_t tps32; | |
1467 | ||
3ae13faa PB |
1468 | tps64 = base_hz; |
1469 | scaled64 = scaled_hz; | |
50933623 | 1470 | while (tps64 > scaled64*2 || tps64 & 0xffffffff00000000ULL) { |
50d0a0f9 GH |
1471 | tps64 >>= 1; |
1472 | shift--; | |
1473 | } | |
1474 | ||
1475 | tps32 = (uint32_t)tps64; | |
50933623 JK |
1476 | while (tps32 <= scaled64 || scaled64 & 0xffffffff00000000ULL) { |
1477 | if (scaled64 & 0xffffffff00000000ULL || tps32 & 0x80000000) | |
5f4e3f88 ZA |
1478 | scaled64 >>= 1; |
1479 | else | |
1480 | tps32 <<= 1; | |
50d0a0f9 GH |
1481 | shift++; |
1482 | } | |
1483 | ||
5f4e3f88 ZA |
1484 | *pshift = shift; |
1485 | *pmultiplier = div_frac(scaled64, tps32); | |
50d0a0f9 | 1486 | |
3ae13faa PB |
1487 | pr_debug("%s: base_hz %llu => %llu, shift %d, mul %u\n", |
1488 | __func__, base_hz, scaled_hz, shift, *pmultiplier); | |
50d0a0f9 GH |
1489 | } |
1490 | ||
d828199e | 1491 | #ifdef CONFIG_X86_64 |
16e8d74d | 1492 | static atomic_t kvm_guest_has_master_clock = ATOMIC_INIT(0); |
d828199e | 1493 | #endif |
16e8d74d | 1494 | |
c8076604 | 1495 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
69b0049a | 1496 | static unsigned long max_tsc_khz; |
c8076604 | 1497 | |
cc578287 | 1498 | static u32 adjust_tsc_khz(u32 khz, s32 ppm) |
1e993611 | 1499 | { |
cc578287 ZA |
1500 | u64 v = (u64)khz * (1000000 + ppm); |
1501 | do_div(v, 1000000); | |
1502 | return v; | |
1e993611 JR |
1503 | } |
1504 | ||
381d585c HZ |
1505 | static int set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale) |
1506 | { | |
1507 | u64 ratio; | |
1508 | ||
1509 | /* Guest TSC same frequency as host TSC? */ | |
1510 | if (!scale) { | |
1511 | vcpu->arch.tsc_scaling_ratio = kvm_default_tsc_scaling_ratio; | |
1512 | return 0; | |
1513 | } | |
1514 | ||
1515 | /* TSC scaling supported? */ | |
1516 | if (!kvm_has_tsc_control) { | |
1517 | if (user_tsc_khz > tsc_khz) { | |
1518 | vcpu->arch.tsc_catchup = 1; | |
1519 | vcpu->arch.tsc_always_catchup = 1; | |
1520 | return 0; | |
1521 | } else { | |
1522 | WARN(1, "user requested TSC rate below hardware speed\n"); | |
1523 | return -1; | |
1524 | } | |
1525 | } | |
1526 | ||
1527 | /* TSC scaling required - calculate ratio */ | |
1528 | ratio = mul_u64_u32_div(1ULL << kvm_tsc_scaling_ratio_frac_bits, | |
1529 | user_tsc_khz, tsc_khz); | |
1530 | ||
1531 | if (ratio == 0 || ratio >= kvm_max_tsc_scaling_ratio) { | |
1532 | WARN_ONCE(1, "Invalid TSC scaling ratio - virtual-tsc-khz=%u\n", | |
1533 | user_tsc_khz); | |
1534 | return -1; | |
1535 | } | |
1536 | ||
1537 | vcpu->arch.tsc_scaling_ratio = ratio; | |
1538 | return 0; | |
1539 | } | |
1540 | ||
4941b8cb | 1541 | static int kvm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz) |
759379dd | 1542 | { |
cc578287 ZA |
1543 | u32 thresh_lo, thresh_hi; |
1544 | int use_scaling = 0; | |
217fc9cf | 1545 | |
03ba32ca | 1546 | /* tsc_khz can be zero if TSC calibration fails */ |
4941b8cb | 1547 | if (user_tsc_khz == 0) { |
ad721883 HZ |
1548 | /* set tsc_scaling_ratio to a safe value */ |
1549 | vcpu->arch.tsc_scaling_ratio = kvm_default_tsc_scaling_ratio; | |
381d585c | 1550 | return -1; |
ad721883 | 1551 | } |
03ba32ca | 1552 | |
c285545f | 1553 | /* Compute a scale to convert nanoseconds in TSC cycles */ |
3ae13faa | 1554 | kvm_get_time_scale(user_tsc_khz * 1000LL, NSEC_PER_SEC, |
cc578287 ZA |
1555 | &vcpu->arch.virtual_tsc_shift, |
1556 | &vcpu->arch.virtual_tsc_mult); | |
4941b8cb | 1557 | vcpu->arch.virtual_tsc_khz = user_tsc_khz; |
cc578287 ZA |
1558 | |
1559 | /* | |
1560 | * Compute the variation in TSC rate which is acceptable | |
1561 | * within the range of tolerance and decide if the | |
1562 | * rate being applied is within that bounds of the hardware | |
1563 | * rate. If so, no scaling or compensation need be done. | |
1564 | */ | |
1565 | thresh_lo = adjust_tsc_khz(tsc_khz, -tsc_tolerance_ppm); | |
1566 | thresh_hi = adjust_tsc_khz(tsc_khz, tsc_tolerance_ppm); | |
4941b8cb PB |
1567 | if (user_tsc_khz < thresh_lo || user_tsc_khz > thresh_hi) { |
1568 | pr_debug("kvm: requested TSC rate %u falls outside tolerance [%u,%u]\n", user_tsc_khz, thresh_lo, thresh_hi); | |
cc578287 ZA |
1569 | use_scaling = 1; |
1570 | } | |
4941b8cb | 1571 | return set_tsc_khz(vcpu, user_tsc_khz, use_scaling); |
c285545f ZA |
1572 | } |
1573 | ||
1574 | static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns) | |
1575 | { | |
e26101b1 | 1576 | u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.this_tsc_nsec, |
cc578287 ZA |
1577 | vcpu->arch.virtual_tsc_mult, |
1578 | vcpu->arch.virtual_tsc_shift); | |
e26101b1 | 1579 | tsc += vcpu->arch.this_tsc_write; |
c285545f ZA |
1580 | return tsc; |
1581 | } | |
1582 | ||
b0c39dc6 VK |
1583 | static inline int gtod_is_based_on_tsc(int mode) |
1584 | { | |
1585 | return mode == VCLOCK_TSC || mode == VCLOCK_HVCLOCK; | |
1586 | } | |
1587 | ||
69b0049a | 1588 | static void kvm_track_tsc_matching(struct kvm_vcpu *vcpu) |
b48aa97e MT |
1589 | { |
1590 | #ifdef CONFIG_X86_64 | |
1591 | bool vcpus_matched; | |
b48aa97e MT |
1592 | struct kvm_arch *ka = &vcpu->kvm->arch; |
1593 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1594 | ||
1595 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1596 | atomic_read(&vcpu->kvm->online_vcpus)); | |
1597 | ||
7f187922 MT |
1598 | /* |
1599 | * Once the masterclock is enabled, always perform request in | |
1600 | * order to update it. | |
1601 | * | |
1602 | * In order to enable masterclock, the host clocksource must be TSC | |
1603 | * and the vcpus need to have matched TSCs. When that happens, | |
1604 | * perform request to enable masterclock. | |
1605 | */ | |
1606 | if (ka->use_master_clock || | |
b0c39dc6 | 1607 | (gtod_is_based_on_tsc(gtod->clock.vclock_mode) && vcpus_matched)) |
b48aa97e MT |
1608 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
1609 | ||
1610 | trace_kvm_track_tsc(vcpu->vcpu_id, ka->nr_vcpus_matched_tsc, | |
1611 | atomic_read(&vcpu->kvm->online_vcpus), | |
1612 | ka->use_master_clock, gtod->clock.vclock_mode); | |
1613 | #endif | |
1614 | } | |
1615 | ||
ba904635 WA |
1616 | static void update_ia32_tsc_adjust_msr(struct kvm_vcpu *vcpu, s64 offset) |
1617 | { | |
e79f245d | 1618 | u64 curr_offset = kvm_x86_ops->read_l1_tsc_offset(vcpu); |
ba904635 WA |
1619 | vcpu->arch.ia32_tsc_adjust_msr += offset - curr_offset; |
1620 | } | |
1621 | ||
35181e86 HZ |
1622 | /* |
1623 | * Multiply tsc by a fixed point number represented by ratio. | |
1624 | * | |
1625 | * The most significant 64-N bits (mult) of ratio represent the | |
1626 | * integral part of the fixed point number; the remaining N bits | |
1627 | * (frac) represent the fractional part, ie. ratio represents a fixed | |
1628 | * point number (mult + frac * 2^(-N)). | |
1629 | * | |
1630 | * N equals to kvm_tsc_scaling_ratio_frac_bits. | |
1631 | */ | |
1632 | static inline u64 __scale_tsc(u64 ratio, u64 tsc) | |
1633 | { | |
1634 | return mul_u64_u64_shr(tsc, ratio, kvm_tsc_scaling_ratio_frac_bits); | |
1635 | } | |
1636 | ||
1637 | u64 kvm_scale_tsc(struct kvm_vcpu *vcpu, u64 tsc) | |
1638 | { | |
1639 | u64 _tsc = tsc; | |
1640 | u64 ratio = vcpu->arch.tsc_scaling_ratio; | |
1641 | ||
1642 | if (ratio != kvm_default_tsc_scaling_ratio) | |
1643 | _tsc = __scale_tsc(ratio, tsc); | |
1644 | ||
1645 | return _tsc; | |
1646 | } | |
1647 | EXPORT_SYMBOL_GPL(kvm_scale_tsc); | |
1648 | ||
07c1419a HZ |
1649 | static u64 kvm_compute_tsc_offset(struct kvm_vcpu *vcpu, u64 target_tsc) |
1650 | { | |
1651 | u64 tsc; | |
1652 | ||
1653 | tsc = kvm_scale_tsc(vcpu, rdtsc()); | |
1654 | ||
1655 | return target_tsc - tsc; | |
1656 | } | |
1657 | ||
4ba76538 HZ |
1658 | u64 kvm_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc) |
1659 | { | |
e79f245d KA |
1660 | u64 tsc_offset = kvm_x86_ops->read_l1_tsc_offset(vcpu); |
1661 | ||
1662 | return tsc_offset + kvm_scale_tsc(vcpu, host_tsc); | |
4ba76538 HZ |
1663 | } |
1664 | EXPORT_SYMBOL_GPL(kvm_read_l1_tsc); | |
1665 | ||
a545ab6a LC |
1666 | static void kvm_vcpu_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) |
1667 | { | |
326e7425 | 1668 | vcpu->arch.tsc_offset = kvm_x86_ops->write_l1_tsc_offset(vcpu, offset); |
a545ab6a LC |
1669 | } |
1670 | ||
b0c39dc6 VK |
1671 | static inline bool kvm_check_tsc_unstable(void) |
1672 | { | |
1673 | #ifdef CONFIG_X86_64 | |
1674 | /* | |
1675 | * TSC is marked unstable when we're running on Hyper-V, | |
1676 | * 'TSC page' clocksource is good. | |
1677 | */ | |
1678 | if (pvclock_gtod_data.clock.vclock_mode == VCLOCK_HVCLOCK) | |
1679 | return false; | |
1680 | #endif | |
1681 | return check_tsc_unstable(); | |
1682 | } | |
1683 | ||
8fe8ab46 | 1684 | void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr) |
99e3e30a ZA |
1685 | { |
1686 | struct kvm *kvm = vcpu->kvm; | |
f38e098f | 1687 | u64 offset, ns, elapsed; |
99e3e30a | 1688 | unsigned long flags; |
b48aa97e | 1689 | bool matched; |
0d3da0d2 | 1690 | bool already_matched; |
8fe8ab46 | 1691 | u64 data = msr->data; |
c5e8ec8e | 1692 | bool synchronizing = false; |
99e3e30a | 1693 | |
038f8c11 | 1694 | raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags); |
07c1419a | 1695 | offset = kvm_compute_tsc_offset(vcpu, data); |
108b249c | 1696 | ns = ktime_get_boot_ns(); |
f38e098f | 1697 | elapsed = ns - kvm->arch.last_tsc_nsec; |
5d3cb0f6 | 1698 | |
03ba32ca | 1699 | if (vcpu->arch.virtual_tsc_khz) { |
bd8fab39 DP |
1700 | if (data == 0 && msr->host_initiated) { |
1701 | /* | |
1702 | * detection of vcpu initialization -- need to sync | |
1703 | * with other vCPUs. This particularly helps to keep | |
1704 | * kvm_clock stable after CPU hotplug | |
1705 | */ | |
1706 | synchronizing = true; | |
1707 | } else { | |
1708 | u64 tsc_exp = kvm->arch.last_tsc_write + | |
1709 | nsec_to_cycles(vcpu, elapsed); | |
1710 | u64 tsc_hz = vcpu->arch.virtual_tsc_khz * 1000LL; | |
1711 | /* | |
1712 | * Special case: TSC write with a small delta (1 second) | |
1713 | * of virtual cycle time against real time is | |
1714 | * interpreted as an attempt to synchronize the CPU. | |
1715 | */ | |
1716 | synchronizing = data < tsc_exp + tsc_hz && | |
1717 | data + tsc_hz > tsc_exp; | |
1718 | } | |
c5e8ec8e | 1719 | } |
f38e098f ZA |
1720 | |
1721 | /* | |
5d3cb0f6 ZA |
1722 | * For a reliable TSC, we can match TSC offsets, and for an unstable |
1723 | * TSC, we add elapsed time in this computation. We could let the | |
1724 | * compensation code attempt to catch up if we fall behind, but | |
1725 | * it's better to try to match offsets from the beginning. | |
1726 | */ | |
c5e8ec8e | 1727 | if (synchronizing && |
5d3cb0f6 | 1728 | vcpu->arch.virtual_tsc_khz == kvm->arch.last_tsc_khz) { |
b0c39dc6 | 1729 | if (!kvm_check_tsc_unstable()) { |
e26101b1 | 1730 | offset = kvm->arch.cur_tsc_offset; |
f38e098f ZA |
1731 | pr_debug("kvm: matched tsc offset for %llu\n", data); |
1732 | } else { | |
857e4099 | 1733 | u64 delta = nsec_to_cycles(vcpu, elapsed); |
5d3cb0f6 | 1734 | data += delta; |
07c1419a | 1735 | offset = kvm_compute_tsc_offset(vcpu, data); |
759379dd | 1736 | pr_debug("kvm: adjusted tsc offset by %llu\n", delta); |
f38e098f | 1737 | } |
b48aa97e | 1738 | matched = true; |
0d3da0d2 | 1739 | already_matched = (vcpu->arch.this_tsc_generation == kvm->arch.cur_tsc_generation); |
e26101b1 ZA |
1740 | } else { |
1741 | /* | |
1742 | * We split periods of matched TSC writes into generations. | |
1743 | * For each generation, we track the original measured | |
1744 | * nanosecond time, offset, and write, so if TSCs are in | |
1745 | * sync, we can match exact offset, and if not, we can match | |
4a969980 | 1746 | * exact software computation in compute_guest_tsc() |
e26101b1 ZA |
1747 | * |
1748 | * These values are tracked in kvm->arch.cur_xxx variables. | |
1749 | */ | |
1750 | kvm->arch.cur_tsc_generation++; | |
1751 | kvm->arch.cur_tsc_nsec = ns; | |
1752 | kvm->arch.cur_tsc_write = data; | |
1753 | kvm->arch.cur_tsc_offset = offset; | |
b48aa97e | 1754 | matched = false; |
0d3da0d2 | 1755 | pr_debug("kvm: new tsc generation %llu, clock %llu\n", |
e26101b1 | 1756 | kvm->arch.cur_tsc_generation, data); |
f38e098f | 1757 | } |
e26101b1 ZA |
1758 | |
1759 | /* | |
1760 | * We also track th most recent recorded KHZ, write and time to | |
1761 | * allow the matching interval to be extended at each write. | |
1762 | */ | |
f38e098f ZA |
1763 | kvm->arch.last_tsc_nsec = ns; |
1764 | kvm->arch.last_tsc_write = data; | |
5d3cb0f6 | 1765 | kvm->arch.last_tsc_khz = vcpu->arch.virtual_tsc_khz; |
99e3e30a | 1766 | |
b183aa58 | 1767 | vcpu->arch.last_guest_tsc = data; |
e26101b1 ZA |
1768 | |
1769 | /* Keep track of which generation this VCPU has synchronized to */ | |
1770 | vcpu->arch.this_tsc_generation = kvm->arch.cur_tsc_generation; | |
1771 | vcpu->arch.this_tsc_nsec = kvm->arch.cur_tsc_nsec; | |
1772 | vcpu->arch.this_tsc_write = kvm->arch.cur_tsc_write; | |
1773 | ||
d6321d49 | 1774 | if (!msr->host_initiated && guest_cpuid_has(vcpu, X86_FEATURE_TSC_ADJUST)) |
ba904635 | 1775 | update_ia32_tsc_adjust_msr(vcpu, offset); |
d6321d49 | 1776 | |
a545ab6a | 1777 | kvm_vcpu_write_tsc_offset(vcpu, offset); |
e26101b1 | 1778 | raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags); |
b48aa97e MT |
1779 | |
1780 | spin_lock(&kvm->arch.pvclock_gtod_sync_lock); | |
0d3da0d2 | 1781 | if (!matched) { |
b48aa97e | 1782 | kvm->arch.nr_vcpus_matched_tsc = 0; |
0d3da0d2 TG |
1783 | } else if (!already_matched) { |
1784 | kvm->arch.nr_vcpus_matched_tsc++; | |
1785 | } | |
b48aa97e MT |
1786 | |
1787 | kvm_track_tsc_matching(vcpu); | |
1788 | spin_unlock(&kvm->arch.pvclock_gtod_sync_lock); | |
99e3e30a | 1789 | } |
e26101b1 | 1790 | |
99e3e30a ZA |
1791 | EXPORT_SYMBOL_GPL(kvm_write_tsc); |
1792 | ||
58ea6767 HZ |
1793 | static inline void adjust_tsc_offset_guest(struct kvm_vcpu *vcpu, |
1794 | s64 adjustment) | |
1795 | { | |
326e7425 LS |
1796 | u64 tsc_offset = kvm_x86_ops->read_l1_tsc_offset(vcpu); |
1797 | kvm_vcpu_write_tsc_offset(vcpu, tsc_offset + adjustment); | |
58ea6767 HZ |
1798 | } |
1799 | ||
1800 | static inline void adjust_tsc_offset_host(struct kvm_vcpu *vcpu, s64 adjustment) | |
1801 | { | |
1802 | if (vcpu->arch.tsc_scaling_ratio != kvm_default_tsc_scaling_ratio) | |
1803 | WARN_ON(adjustment < 0); | |
1804 | adjustment = kvm_scale_tsc(vcpu, (u64) adjustment); | |
ea26e4ec | 1805 | adjust_tsc_offset_guest(vcpu, adjustment); |
58ea6767 HZ |
1806 | } |
1807 | ||
d828199e MT |
1808 | #ifdef CONFIG_X86_64 |
1809 | ||
a5a1d1c2 | 1810 | static u64 read_tsc(void) |
d828199e | 1811 | { |
a5a1d1c2 | 1812 | u64 ret = (u64)rdtsc_ordered(); |
03b9730b | 1813 | u64 last = pvclock_gtod_data.clock.cycle_last; |
d828199e MT |
1814 | |
1815 | if (likely(ret >= last)) | |
1816 | return ret; | |
1817 | ||
1818 | /* | |
1819 | * GCC likes to generate cmov here, but this branch is extremely | |
6a6256f9 | 1820 | * predictable (it's just a function of time and the likely is |
d828199e MT |
1821 | * very likely) and there's a data dependence, so force GCC |
1822 | * to generate a branch instead. I don't barrier() because | |
1823 | * we don't actually need a barrier, and if this function | |
1824 | * ever gets inlined it will generate worse code. | |
1825 | */ | |
1826 | asm volatile (""); | |
1827 | return last; | |
1828 | } | |
1829 | ||
b0c39dc6 | 1830 | static inline u64 vgettsc(u64 *tsc_timestamp, int *mode) |
d828199e MT |
1831 | { |
1832 | long v; | |
1833 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
b0c39dc6 VK |
1834 | u64 tsc_pg_val; |
1835 | ||
1836 | switch (gtod->clock.vclock_mode) { | |
1837 | case VCLOCK_HVCLOCK: | |
1838 | tsc_pg_val = hv_read_tsc_page_tsc(hv_get_tsc_page(), | |
1839 | tsc_timestamp); | |
1840 | if (tsc_pg_val != U64_MAX) { | |
1841 | /* TSC page valid */ | |
1842 | *mode = VCLOCK_HVCLOCK; | |
1843 | v = (tsc_pg_val - gtod->clock.cycle_last) & | |
1844 | gtod->clock.mask; | |
1845 | } else { | |
1846 | /* TSC page invalid */ | |
1847 | *mode = VCLOCK_NONE; | |
1848 | } | |
1849 | break; | |
1850 | case VCLOCK_TSC: | |
1851 | *mode = VCLOCK_TSC; | |
1852 | *tsc_timestamp = read_tsc(); | |
1853 | v = (*tsc_timestamp - gtod->clock.cycle_last) & | |
1854 | gtod->clock.mask; | |
1855 | break; | |
1856 | default: | |
1857 | *mode = VCLOCK_NONE; | |
1858 | } | |
d828199e | 1859 | |
b0c39dc6 VK |
1860 | if (*mode == VCLOCK_NONE) |
1861 | *tsc_timestamp = v = 0; | |
d828199e | 1862 | |
d828199e MT |
1863 | return v * gtod->clock.mult; |
1864 | } | |
1865 | ||
b0c39dc6 | 1866 | static int do_monotonic_boot(s64 *t, u64 *tsc_timestamp) |
d828199e | 1867 | { |
cbcf2dd3 | 1868 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; |
d828199e | 1869 | unsigned long seq; |
d828199e | 1870 | int mode; |
cbcf2dd3 | 1871 | u64 ns; |
d828199e | 1872 | |
d828199e MT |
1873 | do { |
1874 | seq = read_seqcount_begin(>od->seq); | |
cbcf2dd3 | 1875 | ns = gtod->nsec_base; |
b0c39dc6 | 1876 | ns += vgettsc(tsc_timestamp, &mode); |
d828199e | 1877 | ns >>= gtod->clock.shift; |
cbcf2dd3 | 1878 | ns += gtod->boot_ns; |
d828199e | 1879 | } while (unlikely(read_seqcount_retry(>od->seq, seq))); |
cbcf2dd3 | 1880 | *t = ns; |
d828199e MT |
1881 | |
1882 | return mode; | |
1883 | } | |
1884 | ||
899a31f5 | 1885 | static int do_realtime(struct timespec64 *ts, u64 *tsc_timestamp) |
55dd00a7 MT |
1886 | { |
1887 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1888 | unsigned long seq; | |
1889 | int mode; | |
1890 | u64 ns; | |
1891 | ||
1892 | do { | |
1893 | seq = read_seqcount_begin(>od->seq); | |
55dd00a7 MT |
1894 | ts->tv_sec = gtod->wall_time_sec; |
1895 | ns = gtod->nsec_base; | |
b0c39dc6 | 1896 | ns += vgettsc(tsc_timestamp, &mode); |
55dd00a7 MT |
1897 | ns >>= gtod->clock.shift; |
1898 | } while (unlikely(read_seqcount_retry(>od->seq, seq))); | |
1899 | ||
1900 | ts->tv_sec += __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns); | |
1901 | ts->tv_nsec = ns; | |
1902 | ||
1903 | return mode; | |
1904 | } | |
1905 | ||
b0c39dc6 VK |
1906 | /* returns true if host is using TSC based clocksource */ |
1907 | static bool kvm_get_time_and_clockread(s64 *kernel_ns, u64 *tsc_timestamp) | |
d828199e | 1908 | { |
d828199e | 1909 | /* checked again under seqlock below */ |
b0c39dc6 | 1910 | if (!gtod_is_based_on_tsc(pvclock_gtod_data.clock.vclock_mode)) |
d828199e MT |
1911 | return false; |
1912 | ||
b0c39dc6 VK |
1913 | return gtod_is_based_on_tsc(do_monotonic_boot(kernel_ns, |
1914 | tsc_timestamp)); | |
d828199e | 1915 | } |
55dd00a7 | 1916 | |
b0c39dc6 | 1917 | /* returns true if host is using TSC based clocksource */ |
899a31f5 | 1918 | static bool kvm_get_walltime_and_clockread(struct timespec64 *ts, |
b0c39dc6 | 1919 | u64 *tsc_timestamp) |
55dd00a7 MT |
1920 | { |
1921 | /* checked again under seqlock below */ | |
b0c39dc6 | 1922 | if (!gtod_is_based_on_tsc(pvclock_gtod_data.clock.vclock_mode)) |
55dd00a7 MT |
1923 | return false; |
1924 | ||
b0c39dc6 | 1925 | return gtod_is_based_on_tsc(do_realtime(ts, tsc_timestamp)); |
55dd00a7 | 1926 | } |
d828199e MT |
1927 | #endif |
1928 | ||
1929 | /* | |
1930 | * | |
b48aa97e MT |
1931 | * Assuming a stable TSC across physical CPUS, and a stable TSC |
1932 | * across virtual CPUs, the following condition is possible. | |
1933 | * Each numbered line represents an event visible to both | |
d828199e MT |
1934 | * CPUs at the next numbered event. |
1935 | * | |
1936 | * "timespecX" represents host monotonic time. "tscX" represents | |
1937 | * RDTSC value. | |
1938 | * | |
1939 | * VCPU0 on CPU0 | VCPU1 on CPU1 | |
1940 | * | |
1941 | * 1. read timespec0,tsc0 | |
1942 | * 2. | timespec1 = timespec0 + N | |
1943 | * | tsc1 = tsc0 + M | |
1944 | * 3. transition to guest | transition to guest | |
1945 | * 4. ret0 = timespec0 + (rdtsc - tsc0) | | |
1946 | * 5. | ret1 = timespec1 + (rdtsc - tsc1) | |
1947 | * | ret1 = timespec0 + N + (rdtsc - (tsc0 + M)) | |
1948 | * | |
1949 | * Since ret0 update is visible to VCPU1 at time 5, to obey monotonicity: | |
1950 | * | |
1951 | * - ret0 < ret1 | |
1952 | * - timespec0 + (rdtsc - tsc0) < timespec0 + N + (rdtsc - (tsc0 + M)) | |
1953 | * ... | |
1954 | * - 0 < N - M => M < N | |
1955 | * | |
1956 | * That is, when timespec0 != timespec1, M < N. Unfortunately that is not | |
1957 | * always the case (the difference between two distinct xtime instances | |
1958 | * might be smaller then the difference between corresponding TSC reads, | |
1959 | * when updating guest vcpus pvclock areas). | |
1960 | * | |
1961 | * To avoid that problem, do not allow visibility of distinct | |
1962 | * system_timestamp/tsc_timestamp values simultaneously: use a master | |
1963 | * copy of host monotonic time values. Update that master copy | |
1964 | * in lockstep. | |
1965 | * | |
b48aa97e | 1966 | * Rely on synchronization of host TSCs and guest TSCs for monotonicity. |
d828199e MT |
1967 | * |
1968 | */ | |
1969 | ||
1970 | static void pvclock_update_vm_gtod_copy(struct kvm *kvm) | |
1971 | { | |
1972 | #ifdef CONFIG_X86_64 | |
1973 | struct kvm_arch *ka = &kvm->arch; | |
1974 | int vclock_mode; | |
b48aa97e MT |
1975 | bool host_tsc_clocksource, vcpus_matched; |
1976 | ||
1977 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1978 | atomic_read(&kvm->online_vcpus)); | |
d828199e MT |
1979 | |
1980 | /* | |
1981 | * If the host uses TSC clock, then passthrough TSC as stable | |
1982 | * to the guest. | |
1983 | */ | |
b48aa97e | 1984 | host_tsc_clocksource = kvm_get_time_and_clockread( |
d828199e MT |
1985 | &ka->master_kernel_ns, |
1986 | &ka->master_cycle_now); | |
1987 | ||
16a96021 | 1988 | ka->use_master_clock = host_tsc_clocksource && vcpus_matched |
a826faf1 | 1989 | && !ka->backwards_tsc_observed |
54750f2c | 1990 | && !ka->boot_vcpu_runs_old_kvmclock; |
b48aa97e | 1991 | |
d828199e MT |
1992 | if (ka->use_master_clock) |
1993 | atomic_set(&kvm_guest_has_master_clock, 1); | |
1994 | ||
1995 | vclock_mode = pvclock_gtod_data.clock.vclock_mode; | |
b48aa97e MT |
1996 | trace_kvm_update_master_clock(ka->use_master_clock, vclock_mode, |
1997 | vcpus_matched); | |
d828199e MT |
1998 | #endif |
1999 | } | |
2000 | ||
2860c4b1 PB |
2001 | void kvm_make_mclock_inprogress_request(struct kvm *kvm) |
2002 | { | |
2003 | kvm_make_all_cpus_request(kvm, KVM_REQ_MCLOCK_INPROGRESS); | |
2004 | } | |
2005 | ||
2e762ff7 MT |
2006 | static void kvm_gen_update_masterclock(struct kvm *kvm) |
2007 | { | |
2008 | #ifdef CONFIG_X86_64 | |
2009 | int i; | |
2010 | struct kvm_vcpu *vcpu; | |
2011 | struct kvm_arch *ka = &kvm->arch; | |
2012 | ||
2013 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
2014 | kvm_make_mclock_inprogress_request(kvm); | |
2015 | /* no guest entries from this point */ | |
2016 | pvclock_update_vm_gtod_copy(kvm); | |
2017 | ||
2018 | kvm_for_each_vcpu(i, vcpu, kvm) | |
105b21bb | 2019 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
2e762ff7 MT |
2020 | |
2021 | /* guest entries allowed */ | |
2022 | kvm_for_each_vcpu(i, vcpu, kvm) | |
72875d8a | 2023 | kvm_clear_request(KVM_REQ_MCLOCK_INPROGRESS, vcpu); |
2e762ff7 MT |
2024 | |
2025 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
2026 | #endif | |
2027 | } | |
2028 | ||
e891a32e | 2029 | u64 get_kvmclock_ns(struct kvm *kvm) |
108b249c | 2030 | { |
108b249c | 2031 | struct kvm_arch *ka = &kvm->arch; |
8b953440 | 2032 | struct pvclock_vcpu_time_info hv_clock; |
e2c2206a | 2033 | u64 ret; |
108b249c | 2034 | |
8b953440 PB |
2035 | spin_lock(&ka->pvclock_gtod_sync_lock); |
2036 | if (!ka->use_master_clock) { | |
2037 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
2038 | return ktime_get_boot_ns() + ka->kvmclock_offset; | |
108b249c PB |
2039 | } |
2040 | ||
8b953440 PB |
2041 | hv_clock.tsc_timestamp = ka->master_cycle_now; |
2042 | hv_clock.system_time = ka->master_kernel_ns + ka->kvmclock_offset; | |
2043 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
2044 | ||
e2c2206a WL |
2045 | /* both __this_cpu_read() and rdtsc() should be on the same cpu */ |
2046 | get_cpu(); | |
2047 | ||
e70b57a6 WL |
2048 | if (__this_cpu_read(cpu_tsc_khz)) { |
2049 | kvm_get_time_scale(NSEC_PER_SEC, __this_cpu_read(cpu_tsc_khz) * 1000LL, | |
2050 | &hv_clock.tsc_shift, | |
2051 | &hv_clock.tsc_to_system_mul); | |
2052 | ret = __pvclock_read_cycles(&hv_clock, rdtsc()); | |
2053 | } else | |
2054 | ret = ktime_get_boot_ns() + ka->kvmclock_offset; | |
e2c2206a WL |
2055 | |
2056 | put_cpu(); | |
2057 | ||
2058 | return ret; | |
108b249c PB |
2059 | } |
2060 | ||
0d6dd2ff PB |
2061 | static void kvm_setup_pvclock_page(struct kvm_vcpu *v) |
2062 | { | |
2063 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
2064 | struct pvclock_vcpu_time_info guest_hv_clock; | |
2065 | ||
4e335d9e | 2066 | if (unlikely(kvm_read_guest_cached(v->kvm, &vcpu->pv_time, |
0d6dd2ff PB |
2067 | &guest_hv_clock, sizeof(guest_hv_clock)))) |
2068 | return; | |
2069 | ||
2070 | /* This VCPU is paused, but it's legal for a guest to read another | |
2071 | * VCPU's kvmclock, so we really have to follow the specification where | |
2072 | * it says that version is odd if data is being modified, and even after | |
2073 | * it is consistent. | |
2074 | * | |
2075 | * Version field updates must be kept separate. This is because | |
2076 | * kvm_write_guest_cached might use a "rep movs" instruction, and | |
2077 | * writes within a string instruction are weakly ordered. So there | |
2078 | * are three writes overall. | |
2079 | * | |
2080 | * As a small optimization, only write the version field in the first | |
2081 | * and third write. The vcpu->pv_time cache is still valid, because the | |
2082 | * version field is the first in the struct. | |
2083 | */ | |
2084 | BUILD_BUG_ON(offsetof(struct pvclock_vcpu_time_info, version) != 0); | |
2085 | ||
51c4b8bb LA |
2086 | if (guest_hv_clock.version & 1) |
2087 | ++guest_hv_clock.version; /* first time write, random junk */ | |
2088 | ||
0d6dd2ff | 2089 | vcpu->hv_clock.version = guest_hv_clock.version + 1; |
4e335d9e PB |
2090 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
2091 | &vcpu->hv_clock, | |
2092 | sizeof(vcpu->hv_clock.version)); | |
0d6dd2ff PB |
2093 | |
2094 | smp_wmb(); | |
2095 | ||
2096 | /* retain PVCLOCK_GUEST_STOPPED if set in guest copy */ | |
2097 | vcpu->hv_clock.flags |= (guest_hv_clock.flags & PVCLOCK_GUEST_STOPPED); | |
2098 | ||
2099 | if (vcpu->pvclock_set_guest_stopped_request) { | |
2100 | vcpu->hv_clock.flags |= PVCLOCK_GUEST_STOPPED; | |
2101 | vcpu->pvclock_set_guest_stopped_request = false; | |
2102 | } | |
2103 | ||
2104 | trace_kvm_pvclock_update(v->vcpu_id, &vcpu->hv_clock); | |
2105 | ||
4e335d9e PB |
2106 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
2107 | &vcpu->hv_clock, | |
2108 | sizeof(vcpu->hv_clock)); | |
0d6dd2ff PB |
2109 | |
2110 | smp_wmb(); | |
2111 | ||
2112 | vcpu->hv_clock.version++; | |
4e335d9e PB |
2113 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
2114 | &vcpu->hv_clock, | |
2115 | sizeof(vcpu->hv_clock.version)); | |
0d6dd2ff PB |
2116 | } |
2117 | ||
34c238a1 | 2118 | static int kvm_guest_time_update(struct kvm_vcpu *v) |
18068523 | 2119 | { |
78db6a50 | 2120 | unsigned long flags, tgt_tsc_khz; |
18068523 | 2121 | struct kvm_vcpu_arch *vcpu = &v->arch; |
d828199e | 2122 | struct kvm_arch *ka = &v->kvm->arch; |
f25e656d | 2123 | s64 kernel_ns; |
d828199e | 2124 | u64 tsc_timestamp, host_tsc; |
51d59c6b | 2125 | u8 pvclock_flags; |
d828199e MT |
2126 | bool use_master_clock; |
2127 | ||
2128 | kernel_ns = 0; | |
2129 | host_tsc = 0; | |
18068523 | 2130 | |
d828199e MT |
2131 | /* |
2132 | * If the host uses TSC clock, then passthrough TSC as stable | |
2133 | * to the guest. | |
2134 | */ | |
2135 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
2136 | use_master_clock = ka->use_master_clock; | |
2137 | if (use_master_clock) { | |
2138 | host_tsc = ka->master_cycle_now; | |
2139 | kernel_ns = ka->master_kernel_ns; | |
2140 | } | |
2141 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
c09664bb MT |
2142 | |
2143 | /* Keep irq disabled to prevent changes to the clock */ | |
2144 | local_irq_save(flags); | |
78db6a50 PB |
2145 | tgt_tsc_khz = __this_cpu_read(cpu_tsc_khz); |
2146 | if (unlikely(tgt_tsc_khz == 0)) { | |
c09664bb MT |
2147 | local_irq_restore(flags); |
2148 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); | |
2149 | return 1; | |
2150 | } | |
d828199e | 2151 | if (!use_master_clock) { |
4ea1636b | 2152 | host_tsc = rdtsc(); |
108b249c | 2153 | kernel_ns = ktime_get_boot_ns(); |
d828199e MT |
2154 | } |
2155 | ||
4ba76538 | 2156 | tsc_timestamp = kvm_read_l1_tsc(v, host_tsc); |
d828199e | 2157 | |
c285545f ZA |
2158 | /* |
2159 | * We may have to catch up the TSC to match elapsed wall clock | |
2160 | * time for two reasons, even if kvmclock is used. | |
2161 | * 1) CPU could have been running below the maximum TSC rate | |
2162 | * 2) Broken TSC compensation resets the base at each VCPU | |
2163 | * entry to avoid unknown leaps of TSC even when running | |
2164 | * again on the same CPU. This may cause apparent elapsed | |
2165 | * time to disappear, and the guest to stand still or run | |
2166 | * very slowly. | |
2167 | */ | |
2168 | if (vcpu->tsc_catchup) { | |
2169 | u64 tsc = compute_guest_tsc(v, kernel_ns); | |
2170 | if (tsc > tsc_timestamp) { | |
f1e2b260 | 2171 | adjust_tsc_offset_guest(v, tsc - tsc_timestamp); |
c285545f ZA |
2172 | tsc_timestamp = tsc; |
2173 | } | |
50d0a0f9 GH |
2174 | } |
2175 | ||
18068523 GOC |
2176 | local_irq_restore(flags); |
2177 | ||
0d6dd2ff | 2178 | /* With all the info we got, fill in the values */ |
18068523 | 2179 | |
78db6a50 PB |
2180 | if (kvm_has_tsc_control) |
2181 | tgt_tsc_khz = kvm_scale_tsc(v, tgt_tsc_khz); | |
2182 | ||
2183 | if (unlikely(vcpu->hw_tsc_khz != tgt_tsc_khz)) { | |
3ae13faa | 2184 | kvm_get_time_scale(NSEC_PER_SEC, tgt_tsc_khz * 1000LL, |
5f4e3f88 ZA |
2185 | &vcpu->hv_clock.tsc_shift, |
2186 | &vcpu->hv_clock.tsc_to_system_mul); | |
78db6a50 | 2187 | vcpu->hw_tsc_khz = tgt_tsc_khz; |
8cfdc000 ZA |
2188 | } |
2189 | ||
1d5f066e | 2190 | vcpu->hv_clock.tsc_timestamp = tsc_timestamp; |
759379dd | 2191 | vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset; |
28e4639a | 2192 | vcpu->last_guest_tsc = tsc_timestamp; |
51d59c6b | 2193 | |
d828199e | 2194 | /* If the host uses TSC clocksource, then it is stable */ |
0d6dd2ff | 2195 | pvclock_flags = 0; |
d828199e MT |
2196 | if (use_master_clock) |
2197 | pvclock_flags |= PVCLOCK_TSC_STABLE_BIT; | |
2198 | ||
78c0337a MT |
2199 | vcpu->hv_clock.flags = pvclock_flags; |
2200 | ||
095cf55d PB |
2201 | if (vcpu->pv_time_enabled) |
2202 | kvm_setup_pvclock_page(v); | |
2203 | if (v == kvm_get_vcpu(v->kvm, 0)) | |
2204 | kvm_hv_setup_tsc_page(v->kvm, &vcpu->hv_clock); | |
8cfdc000 | 2205 | return 0; |
c8076604 GH |
2206 | } |
2207 | ||
0061d53d MT |
2208 | /* |
2209 | * kvmclock updates which are isolated to a given vcpu, such as | |
2210 | * vcpu->cpu migration, should not allow system_timestamp from | |
2211 | * the rest of the vcpus to remain static. Otherwise ntp frequency | |
2212 | * correction applies to one vcpu's system_timestamp but not | |
2213 | * the others. | |
2214 | * | |
2215 | * So in those cases, request a kvmclock update for all vcpus. | |
7e44e449 AJ |
2216 | * We need to rate-limit these requests though, as they can |
2217 | * considerably slow guests that have a large number of vcpus. | |
2218 | * The time for a remote vcpu to update its kvmclock is bound | |
2219 | * by the delay we use to rate-limit the updates. | |
0061d53d MT |
2220 | */ |
2221 | ||
7e44e449 AJ |
2222 | #define KVMCLOCK_UPDATE_DELAY msecs_to_jiffies(100) |
2223 | ||
2224 | static void kvmclock_update_fn(struct work_struct *work) | |
0061d53d MT |
2225 | { |
2226 | int i; | |
7e44e449 AJ |
2227 | struct delayed_work *dwork = to_delayed_work(work); |
2228 | struct kvm_arch *ka = container_of(dwork, struct kvm_arch, | |
2229 | kvmclock_update_work); | |
2230 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
0061d53d MT |
2231 | struct kvm_vcpu *vcpu; |
2232 | ||
2233 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
105b21bb | 2234 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0061d53d MT |
2235 | kvm_vcpu_kick(vcpu); |
2236 | } | |
2237 | } | |
2238 | ||
7e44e449 AJ |
2239 | static void kvm_gen_kvmclock_update(struct kvm_vcpu *v) |
2240 | { | |
2241 | struct kvm *kvm = v->kvm; | |
2242 | ||
105b21bb | 2243 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); |
7e44e449 AJ |
2244 | schedule_delayed_work(&kvm->arch.kvmclock_update_work, |
2245 | KVMCLOCK_UPDATE_DELAY); | |
2246 | } | |
2247 | ||
332967a3 AJ |
2248 | #define KVMCLOCK_SYNC_PERIOD (300 * HZ) |
2249 | ||
2250 | static void kvmclock_sync_fn(struct work_struct *work) | |
2251 | { | |
2252 | struct delayed_work *dwork = to_delayed_work(work); | |
2253 | struct kvm_arch *ka = container_of(dwork, struct kvm_arch, | |
2254 | kvmclock_sync_work); | |
2255 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
2256 | ||
630994b3 MT |
2257 | if (!kvmclock_periodic_sync) |
2258 | return; | |
2259 | ||
332967a3 AJ |
2260 | schedule_delayed_work(&kvm->arch.kvmclock_update_work, 0); |
2261 | schedule_delayed_work(&kvm->arch.kvmclock_sync_work, | |
2262 | KVMCLOCK_SYNC_PERIOD); | |
2263 | } | |
2264 | ||
9ffd986c | 2265 | static int set_msr_mce(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
15c4a640 | 2266 | { |
890ca9ae HY |
2267 | u64 mcg_cap = vcpu->arch.mcg_cap; |
2268 | unsigned bank_num = mcg_cap & 0xff; | |
9ffd986c WL |
2269 | u32 msr = msr_info->index; |
2270 | u64 data = msr_info->data; | |
890ca9ae | 2271 | |
15c4a640 | 2272 | switch (msr) { |
15c4a640 | 2273 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 2274 | vcpu->arch.mcg_status = data; |
15c4a640 | 2275 | break; |
c7ac679c | 2276 | case MSR_IA32_MCG_CTL: |
44883f01 PB |
2277 | if (!(mcg_cap & MCG_CTL_P) && |
2278 | (data || !msr_info->host_initiated)) | |
890ca9ae HY |
2279 | return 1; |
2280 | if (data != 0 && data != ~(u64)0) | |
44883f01 | 2281 | return 1; |
890ca9ae HY |
2282 | vcpu->arch.mcg_ctl = data; |
2283 | break; | |
2284 | default: | |
2285 | if (msr >= MSR_IA32_MC0_CTL && | |
81760dcc | 2286 | msr < MSR_IA32_MCx_CTL(bank_num)) { |
890ca9ae | 2287 | u32 offset = msr - MSR_IA32_MC0_CTL; |
114be429 AP |
2288 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
2289 | * some Linux kernels though clear bit 10 in bank 4 to | |
2290 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore | |
2291 | * this to avoid an uncatched #GP in the guest | |
2292 | */ | |
890ca9ae | 2293 | if ((offset & 0x3) == 0 && |
114be429 | 2294 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
890ca9ae | 2295 | return -1; |
9ffd986c WL |
2296 | if (!msr_info->host_initiated && |
2297 | (offset & 0x3) == 1 && data != 0) | |
2298 | return -1; | |
890ca9ae HY |
2299 | vcpu->arch.mce_banks[offset] = data; |
2300 | break; | |
2301 | } | |
2302 | return 1; | |
2303 | } | |
2304 | return 0; | |
2305 | } | |
2306 | ||
ffde22ac ES |
2307 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
2308 | { | |
2309 | struct kvm *kvm = vcpu->kvm; | |
2310 | int lm = is_long_mode(vcpu); | |
2311 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
2312 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
2313 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
2314 | : kvm->arch.xen_hvm_config.blob_size_32; | |
2315 | u32 page_num = data & ~PAGE_MASK; | |
2316 | u64 page_addr = data & PAGE_MASK; | |
2317 | u8 *page; | |
2318 | int r; | |
2319 | ||
2320 | r = -E2BIG; | |
2321 | if (page_num >= blob_size) | |
2322 | goto out; | |
2323 | r = -ENOMEM; | |
ff5c2c03 SL |
2324 | page = memdup_user(blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE); |
2325 | if (IS_ERR(page)) { | |
2326 | r = PTR_ERR(page); | |
ffde22ac | 2327 | goto out; |
ff5c2c03 | 2328 | } |
54bf36aa | 2329 | if (kvm_vcpu_write_guest(vcpu, page_addr, page, PAGE_SIZE)) |
ffde22ac ES |
2330 | goto out_free; |
2331 | r = 0; | |
2332 | out_free: | |
2333 | kfree(page); | |
2334 | out: | |
2335 | return r; | |
2336 | } | |
2337 | ||
344d9588 GN |
2338 | static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data) |
2339 | { | |
2340 | gpa_t gpa = data & ~0x3f; | |
2341 | ||
52a5c155 WL |
2342 | /* Bits 3:5 are reserved, Should be zero */ |
2343 | if (data & 0x38) | |
344d9588 GN |
2344 | return 1; |
2345 | ||
2346 | vcpu->arch.apf.msr_val = data; | |
2347 | ||
2348 | if (!(data & KVM_ASYNC_PF_ENABLED)) { | |
2349 | kvm_clear_async_pf_completion_queue(vcpu); | |
2350 | kvm_async_pf_hash_reset(vcpu); | |
2351 | return 0; | |
2352 | } | |
2353 | ||
4e335d9e | 2354 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.apf.data, gpa, |
8f964525 | 2355 | sizeof(u32))) |
344d9588 GN |
2356 | return 1; |
2357 | ||
6adba527 | 2358 | vcpu->arch.apf.send_user_only = !(data & KVM_ASYNC_PF_SEND_ALWAYS); |
52a5c155 | 2359 | vcpu->arch.apf.delivery_as_pf_vmexit = data & KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT; |
344d9588 GN |
2360 | kvm_async_pf_wakeup_all(vcpu); |
2361 | return 0; | |
2362 | } | |
2363 | ||
12f9a48f GC |
2364 | static void kvmclock_reset(struct kvm_vcpu *vcpu) |
2365 | { | |
0b79459b | 2366 | vcpu->arch.pv_time_enabled = false; |
12f9a48f GC |
2367 | } |
2368 | ||
f38a7b75 WL |
2369 | static void kvm_vcpu_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa) |
2370 | { | |
2371 | ++vcpu->stat.tlb_flush; | |
2372 | kvm_x86_ops->tlb_flush(vcpu, invalidate_gpa); | |
2373 | } | |
2374 | ||
c9aaa895 GC |
2375 | static void record_steal_time(struct kvm_vcpu *vcpu) |
2376 | { | |
2377 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
2378 | return; | |
2379 | ||
4e335d9e | 2380 | if (unlikely(kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
c9aaa895 GC |
2381 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)))) |
2382 | return; | |
2383 | ||
f38a7b75 WL |
2384 | /* |
2385 | * Doing a TLB flush here, on the guest's behalf, can avoid | |
2386 | * expensive IPIs. | |
2387 | */ | |
2388 | if (xchg(&vcpu->arch.st.steal.preempted, 0) & KVM_VCPU_FLUSH_TLB) | |
2389 | kvm_vcpu_flush_tlb(vcpu, false); | |
0b9f6c46 | 2390 | |
35f3fae1 WL |
2391 | if (vcpu->arch.st.steal.version & 1) |
2392 | vcpu->arch.st.steal.version += 1; /* first time write, random junk */ | |
2393 | ||
2394 | vcpu->arch.st.steal.version += 1; | |
2395 | ||
4e335d9e | 2396 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
35f3fae1 WL |
2397 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); |
2398 | ||
2399 | smp_wmb(); | |
2400 | ||
c54cdf14 LC |
2401 | vcpu->arch.st.steal.steal += current->sched_info.run_delay - |
2402 | vcpu->arch.st.last_steal; | |
2403 | vcpu->arch.st.last_steal = current->sched_info.run_delay; | |
35f3fae1 | 2404 | |
4e335d9e | 2405 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
35f3fae1 WL |
2406 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); |
2407 | ||
2408 | smp_wmb(); | |
2409 | ||
2410 | vcpu->arch.st.steal.version += 1; | |
c9aaa895 | 2411 | |
4e335d9e | 2412 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
c9aaa895 GC |
2413 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); |
2414 | } | |
2415 | ||
8fe8ab46 | 2416 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
15c4a640 | 2417 | { |
5753785f | 2418 | bool pr = false; |
8fe8ab46 WA |
2419 | u32 msr = msr_info->index; |
2420 | u64 data = msr_info->data; | |
5753785f | 2421 | |
15c4a640 | 2422 | switch (msr) { |
2e32b719 | 2423 | case MSR_AMD64_NB_CFG: |
2e32b719 BP |
2424 | case MSR_IA32_UCODE_WRITE: |
2425 | case MSR_VM_HSAVE_PA: | |
2426 | case MSR_AMD64_PATCH_LOADER: | |
2427 | case MSR_AMD64_BU_CFG2: | |
405a353a | 2428 | case MSR_AMD64_DC_CFG: |
2e32b719 BP |
2429 | break; |
2430 | ||
518e7b94 WL |
2431 | case MSR_IA32_UCODE_REV: |
2432 | if (msr_info->host_initiated) | |
2433 | vcpu->arch.microcode_version = data; | |
2434 | break; | |
15c4a640 | 2435 | case MSR_EFER: |
b69e8cae | 2436 | return set_efer(vcpu, data); |
8f1589d9 AP |
2437 | case MSR_K7_HWCR: |
2438 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
82494028 | 2439 | data &= ~(u64)0x100; /* ignore ignne emulation enable */ |
a223c313 | 2440 | data &= ~(u64)0x8; /* ignore TLB cache disable */ |
22d48b2d | 2441 | data &= ~(u64)0x40000; /* ignore Mc status write enable */ |
8f1589d9 | 2442 | if (data != 0) { |
a737f256 CD |
2443 | vcpu_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", |
2444 | data); | |
8f1589d9 AP |
2445 | return 1; |
2446 | } | |
15c4a640 | 2447 | break; |
f7c6d140 AP |
2448 | case MSR_FAM10H_MMIO_CONF_BASE: |
2449 | if (data != 0) { | |
a737f256 CD |
2450 | vcpu_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " |
2451 | "0x%llx\n", data); | |
f7c6d140 AP |
2452 | return 1; |
2453 | } | |
15c4a640 | 2454 | break; |
b5e2fec0 AG |
2455 | case MSR_IA32_DEBUGCTLMSR: |
2456 | if (!data) { | |
2457 | /* We support the non-activated case already */ | |
2458 | break; | |
2459 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
2460 | /* Values other than LBR and BTF are vendor-specific, | |
2461 | thus reserved and should throw a #GP */ | |
2462 | return 1; | |
2463 | } | |
a737f256 CD |
2464 | vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", |
2465 | __func__, data); | |
b5e2fec0 | 2466 | break; |
9ba075a6 | 2467 | case 0x200 ... 0x2ff: |
ff53604b | 2468 | return kvm_mtrr_set_msr(vcpu, msr, data); |
15c4a640 | 2469 | case MSR_IA32_APICBASE: |
58cb628d | 2470 | return kvm_set_apic_base(vcpu, msr_info); |
0105d1a5 GN |
2471 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
2472 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
a3e06bbe LJ |
2473 | case MSR_IA32_TSCDEADLINE: |
2474 | kvm_set_lapic_tscdeadline_msr(vcpu, data); | |
2475 | break; | |
ba904635 | 2476 | case MSR_IA32_TSC_ADJUST: |
d6321d49 | 2477 | if (guest_cpuid_has(vcpu, X86_FEATURE_TSC_ADJUST)) { |
ba904635 | 2478 | if (!msr_info->host_initiated) { |
d913b904 | 2479 | s64 adj = data - vcpu->arch.ia32_tsc_adjust_msr; |
d7add054 | 2480 | adjust_tsc_offset_guest(vcpu, adj); |
ba904635 WA |
2481 | } |
2482 | vcpu->arch.ia32_tsc_adjust_msr = data; | |
2483 | } | |
2484 | break; | |
15c4a640 | 2485 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 2486 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 2487 | break; |
64d60670 PB |
2488 | case MSR_IA32_SMBASE: |
2489 | if (!msr_info->host_initiated) | |
2490 | return 1; | |
2491 | vcpu->arch.smbase = data; | |
2492 | break; | |
dd259935 PB |
2493 | case MSR_IA32_TSC: |
2494 | kvm_write_tsc(vcpu, msr_info); | |
2495 | break; | |
52797bf9 LA |
2496 | case MSR_SMI_COUNT: |
2497 | if (!msr_info->host_initiated) | |
2498 | return 1; | |
2499 | vcpu->arch.smi_count = data; | |
2500 | break; | |
11c6bffa | 2501 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
2502 | case MSR_KVM_WALL_CLOCK: |
2503 | vcpu->kvm->arch.wall_clock = data; | |
2504 | kvm_write_wall_clock(vcpu->kvm, data); | |
2505 | break; | |
11c6bffa | 2506 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 | 2507 | case MSR_KVM_SYSTEM_TIME: { |
54750f2c MT |
2508 | struct kvm_arch *ka = &vcpu->kvm->arch; |
2509 | ||
12f9a48f | 2510 | kvmclock_reset(vcpu); |
18068523 | 2511 | |
54750f2c MT |
2512 | if (vcpu->vcpu_id == 0 && !msr_info->host_initiated) { |
2513 | bool tmp = (msr == MSR_KVM_SYSTEM_TIME); | |
2514 | ||
2515 | if (ka->boot_vcpu_runs_old_kvmclock != tmp) | |
1bd2009e | 2516 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
54750f2c MT |
2517 | |
2518 | ka->boot_vcpu_runs_old_kvmclock = tmp; | |
2519 | } | |
2520 | ||
18068523 | 2521 | vcpu->arch.time = data; |
0061d53d | 2522 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
18068523 GOC |
2523 | |
2524 | /* we verify if the enable bit is set... */ | |
2525 | if (!(data & 1)) | |
2526 | break; | |
2527 | ||
4e335d9e | 2528 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, |
8f964525 AH |
2529 | &vcpu->arch.pv_time, data & ~1ULL, |
2530 | sizeof(struct pvclock_vcpu_time_info))) | |
0b79459b AH |
2531 | vcpu->arch.pv_time_enabled = false; |
2532 | else | |
2533 | vcpu->arch.pv_time_enabled = true; | |
32cad84f | 2534 | |
18068523 GOC |
2535 | break; |
2536 | } | |
344d9588 GN |
2537 | case MSR_KVM_ASYNC_PF_EN: |
2538 | if (kvm_pv_enable_async_pf(vcpu, data)) | |
2539 | return 1; | |
2540 | break; | |
c9aaa895 GC |
2541 | case MSR_KVM_STEAL_TIME: |
2542 | ||
2543 | if (unlikely(!sched_info_on())) | |
2544 | return 1; | |
2545 | ||
2546 | if (data & KVM_STEAL_RESERVED_MASK) | |
2547 | return 1; | |
2548 | ||
4e335d9e | 2549 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.st.stime, |
8f964525 AH |
2550 | data & KVM_STEAL_VALID_BITS, |
2551 | sizeof(struct kvm_steal_time))) | |
c9aaa895 GC |
2552 | return 1; |
2553 | ||
2554 | vcpu->arch.st.msr_val = data; | |
2555 | ||
2556 | if (!(data & KVM_MSR_ENABLED)) | |
2557 | break; | |
2558 | ||
c9aaa895 GC |
2559 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); |
2560 | ||
2561 | break; | |
ae7a2a3f | 2562 | case MSR_KVM_PV_EOI_EN: |
72bbf935 | 2563 | if (kvm_lapic_enable_pv_eoi(vcpu, data, sizeof(u8))) |
ae7a2a3f MT |
2564 | return 1; |
2565 | break; | |
c9aaa895 | 2566 | |
890ca9ae HY |
2567 | case MSR_IA32_MCG_CTL: |
2568 | case MSR_IA32_MCG_STATUS: | |
81760dcc | 2569 | case MSR_IA32_MC0_CTL ... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS) - 1: |
9ffd986c | 2570 | return set_msr_mce(vcpu, msr_info); |
71db6023 | 2571 | |
6912ac32 WH |
2572 | case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3: |
2573 | case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1: | |
2574 | pr = true; /* fall through */ | |
2575 | case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3: | |
2576 | case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1: | |
c6702c9d | 2577 | if (kvm_pmu_is_valid_msr(vcpu, msr)) |
afd80d85 | 2578 | return kvm_pmu_set_msr(vcpu, msr_info); |
5753785f GN |
2579 | |
2580 | if (pr || data != 0) | |
a737f256 CD |
2581 | vcpu_unimpl(vcpu, "disabled perfctr wrmsr: " |
2582 | "0x%x data 0x%llx\n", msr, data); | |
5753785f | 2583 | break; |
84e0cefa JS |
2584 | case MSR_K7_CLK_CTL: |
2585 | /* | |
2586 | * Ignore all writes to this no longer documented MSR. | |
2587 | * Writes are only relevant for old K7 processors, | |
2588 | * all pre-dating SVM, but a recommended workaround from | |
4a969980 | 2589 | * AMD for these chips. It is possible to specify the |
84e0cefa JS |
2590 | * affected processor models on the command line, hence |
2591 | * the need to ignore the workaround. | |
2592 | */ | |
2593 | break; | |
55cd8e5a | 2594 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
e7d9513b AS |
2595 | case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: |
2596 | case HV_X64_MSR_CRASH_CTL: | |
1f4b34f8 | 2597 | case HV_X64_MSR_STIMER0_CONFIG ... HV_X64_MSR_STIMER3_COUNT: |
a2e164e7 VK |
2598 | case HV_X64_MSR_REENLIGHTENMENT_CONTROL: |
2599 | case HV_X64_MSR_TSC_EMULATION_CONTROL: | |
2600 | case HV_X64_MSR_TSC_EMULATION_STATUS: | |
e7d9513b AS |
2601 | return kvm_hv_set_msr_common(vcpu, msr, data, |
2602 | msr_info->host_initiated); | |
91c9c3ed | 2603 | case MSR_IA32_BBL_CR_CTL3: |
2604 | /* Drop writes to this legacy MSR -- see rdmsr | |
2605 | * counterpart for further detail. | |
2606 | */ | |
fab0aa3b EM |
2607 | if (report_ignored_msrs) |
2608 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data 0x%llx\n", | |
2609 | msr, data); | |
91c9c3ed | 2610 | break; |
2b036c6b | 2611 | case MSR_AMD64_OSVW_ID_LENGTH: |
d6321d49 | 2612 | if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW)) |
2b036c6b BO |
2613 | return 1; |
2614 | vcpu->arch.osvw.length = data; | |
2615 | break; | |
2616 | case MSR_AMD64_OSVW_STATUS: | |
d6321d49 | 2617 | if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW)) |
2b036c6b BO |
2618 | return 1; |
2619 | vcpu->arch.osvw.status = data; | |
2620 | break; | |
db2336a8 KH |
2621 | case MSR_PLATFORM_INFO: |
2622 | if (!msr_info->host_initiated || | |
db2336a8 KH |
2623 | (!(data & MSR_PLATFORM_INFO_CPUID_FAULT) && |
2624 | cpuid_fault_enabled(vcpu))) | |
2625 | return 1; | |
2626 | vcpu->arch.msr_platform_info = data; | |
2627 | break; | |
2628 | case MSR_MISC_FEATURES_ENABLES: | |
2629 | if (data & ~MSR_MISC_FEATURES_ENABLES_CPUID_FAULT || | |
2630 | (data & MSR_MISC_FEATURES_ENABLES_CPUID_FAULT && | |
2631 | !supports_cpuid_fault(vcpu))) | |
2632 | return 1; | |
2633 | vcpu->arch.msr_misc_features_enables = data; | |
2634 | break; | |
15c4a640 | 2635 | default: |
ffde22ac ES |
2636 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
2637 | return xen_hvm_config(vcpu, data); | |
c6702c9d | 2638 | if (kvm_pmu_is_valid_msr(vcpu, msr)) |
afd80d85 | 2639 | return kvm_pmu_set_msr(vcpu, msr_info); |
ed85c068 | 2640 | if (!ignore_msrs) { |
ae0f5499 | 2641 | vcpu_debug_ratelimited(vcpu, "unhandled wrmsr: 0x%x data 0x%llx\n", |
a737f256 | 2642 | msr, data); |
ed85c068 AP |
2643 | return 1; |
2644 | } else { | |
fab0aa3b EM |
2645 | if (report_ignored_msrs) |
2646 | vcpu_unimpl(vcpu, | |
2647 | "ignored wrmsr: 0x%x data 0x%llx\n", | |
2648 | msr, data); | |
ed85c068 AP |
2649 | break; |
2650 | } | |
15c4a640 CO |
2651 | } |
2652 | return 0; | |
2653 | } | |
2654 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
2655 | ||
2656 | ||
2657 | /* | |
2658 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
2659 | * Returns 0 on success, non-0 otherwise. | |
2660 | * Assumes vcpu_load() was already called. | |
2661 | */ | |
609e36d3 | 2662 | int kvm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
15c4a640 | 2663 | { |
609e36d3 | 2664 | return kvm_x86_ops->get_msr(vcpu, msr); |
15c4a640 | 2665 | } |
ff651cb6 | 2666 | EXPORT_SYMBOL_GPL(kvm_get_msr); |
15c4a640 | 2667 | |
44883f01 | 2668 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host) |
15c4a640 CO |
2669 | { |
2670 | u64 data; | |
890ca9ae HY |
2671 | u64 mcg_cap = vcpu->arch.mcg_cap; |
2672 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
2673 | |
2674 | switch (msr) { | |
15c4a640 CO |
2675 | case MSR_IA32_P5_MC_ADDR: |
2676 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
2677 | data = 0; |
2678 | break; | |
15c4a640 | 2679 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
2680 | data = vcpu->arch.mcg_cap; |
2681 | break; | |
c7ac679c | 2682 | case MSR_IA32_MCG_CTL: |
44883f01 | 2683 | if (!(mcg_cap & MCG_CTL_P) && !host) |
890ca9ae HY |
2684 | return 1; |
2685 | data = vcpu->arch.mcg_ctl; | |
2686 | break; | |
2687 | case MSR_IA32_MCG_STATUS: | |
2688 | data = vcpu->arch.mcg_status; | |
2689 | break; | |
2690 | default: | |
2691 | if (msr >= MSR_IA32_MC0_CTL && | |
81760dcc | 2692 | msr < MSR_IA32_MCx_CTL(bank_num)) { |
890ca9ae HY |
2693 | u32 offset = msr - MSR_IA32_MC0_CTL; |
2694 | data = vcpu->arch.mce_banks[offset]; | |
2695 | break; | |
2696 | } | |
2697 | return 1; | |
2698 | } | |
2699 | *pdata = data; | |
2700 | return 0; | |
2701 | } | |
2702 | ||
609e36d3 | 2703 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
890ca9ae | 2704 | { |
609e36d3 | 2705 | switch (msr_info->index) { |
890ca9ae | 2706 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 2707 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
2708 | case MSR_IA32_DEBUGCTLMSR: |
2709 | case MSR_IA32_LASTBRANCHFROMIP: | |
2710 | case MSR_IA32_LASTBRANCHTOIP: | |
2711 | case MSR_IA32_LASTINTFROMIP: | |
2712 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd | 2713 | case MSR_K8_SYSCFG: |
3afb1121 PB |
2714 | case MSR_K8_TSEG_ADDR: |
2715 | case MSR_K8_TSEG_MASK: | |
60af2ecd | 2716 | case MSR_K7_HWCR: |
61a6bd67 | 2717 | case MSR_VM_HSAVE_PA: |
1fdbd48c | 2718 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 2719 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 2720 | case MSR_FAM10H_MMIO_CONF_BASE: |
2e32b719 | 2721 | case MSR_AMD64_BU_CFG2: |
0c2df2a1 | 2722 | case MSR_IA32_PERF_CTL: |
405a353a | 2723 | case MSR_AMD64_DC_CFG: |
609e36d3 | 2724 | msr_info->data = 0; |
15c4a640 | 2725 | break; |
c51eb52b | 2726 | case MSR_F15H_PERF_CTL0 ... MSR_F15H_PERF_CTR5: |
6912ac32 WH |
2727 | case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3: |
2728 | case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3: | |
2729 | case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1: | |
2730 | case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1: | |
c6702c9d | 2731 | if (kvm_pmu_is_valid_msr(vcpu, msr_info->index)) |
609e36d3 PB |
2732 | return kvm_pmu_get_msr(vcpu, msr_info->index, &msr_info->data); |
2733 | msr_info->data = 0; | |
5753785f | 2734 | break; |
742bc670 | 2735 | case MSR_IA32_UCODE_REV: |
518e7b94 | 2736 | msr_info->data = vcpu->arch.microcode_version; |
742bc670 | 2737 | break; |
dd259935 PB |
2738 | case MSR_IA32_TSC: |
2739 | msr_info->data = kvm_scale_tsc(vcpu, rdtsc()) + vcpu->arch.tsc_offset; | |
2740 | break; | |
9ba075a6 | 2741 | case MSR_MTRRcap: |
9ba075a6 | 2742 | case 0x200 ... 0x2ff: |
ff53604b | 2743 | return kvm_mtrr_get_msr(vcpu, msr_info->index, &msr_info->data); |
15c4a640 | 2744 | case 0xcd: /* fsb frequency */ |
609e36d3 | 2745 | msr_info->data = 3; |
15c4a640 | 2746 | break; |
7b914098 JS |
2747 | /* |
2748 | * MSR_EBC_FREQUENCY_ID | |
2749 | * Conservative value valid for even the basic CPU models. | |
2750 | * Models 0,1: 000 in bits 23:21 indicating a bus speed of | |
2751 | * 100MHz, model 2 000 in bits 18:16 indicating 100MHz, | |
2752 | * and 266MHz for model 3, or 4. Set Core Clock | |
2753 | * Frequency to System Bus Frequency Ratio to 1 (bits | |
2754 | * 31:24) even though these are only valid for CPU | |
2755 | * models > 2, however guests may end up dividing or | |
2756 | * multiplying by zero otherwise. | |
2757 | */ | |
2758 | case MSR_EBC_FREQUENCY_ID: | |
609e36d3 | 2759 | msr_info->data = 1 << 24; |
7b914098 | 2760 | break; |
15c4a640 | 2761 | case MSR_IA32_APICBASE: |
609e36d3 | 2762 | msr_info->data = kvm_get_apic_base(vcpu); |
15c4a640 | 2763 | break; |
0105d1a5 | 2764 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
609e36d3 | 2765 | return kvm_x2apic_msr_read(vcpu, msr_info->index, &msr_info->data); |
0105d1a5 | 2766 | break; |
a3e06bbe | 2767 | case MSR_IA32_TSCDEADLINE: |
609e36d3 | 2768 | msr_info->data = kvm_get_lapic_tscdeadline_msr(vcpu); |
a3e06bbe | 2769 | break; |
ba904635 | 2770 | case MSR_IA32_TSC_ADJUST: |
609e36d3 | 2771 | msr_info->data = (u64)vcpu->arch.ia32_tsc_adjust_msr; |
ba904635 | 2772 | break; |
15c4a640 | 2773 | case MSR_IA32_MISC_ENABLE: |
609e36d3 | 2774 | msr_info->data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 2775 | break; |
64d60670 PB |
2776 | case MSR_IA32_SMBASE: |
2777 | if (!msr_info->host_initiated) | |
2778 | return 1; | |
2779 | msr_info->data = vcpu->arch.smbase; | |
15c4a640 | 2780 | break; |
52797bf9 LA |
2781 | case MSR_SMI_COUNT: |
2782 | msr_info->data = vcpu->arch.smi_count; | |
2783 | break; | |
847f0ad8 AG |
2784 | case MSR_IA32_PERF_STATUS: |
2785 | /* TSC increment by tick */ | |
609e36d3 | 2786 | msr_info->data = 1000ULL; |
847f0ad8 | 2787 | /* CPU multiplier */ |
b0996ae4 | 2788 | msr_info->data |= (((uint64_t)4ULL) << 40); |
847f0ad8 | 2789 | break; |
15c4a640 | 2790 | case MSR_EFER: |
609e36d3 | 2791 | msr_info->data = vcpu->arch.efer; |
15c4a640 | 2792 | break; |
18068523 | 2793 | case MSR_KVM_WALL_CLOCK: |
11c6bffa | 2794 | case MSR_KVM_WALL_CLOCK_NEW: |
609e36d3 | 2795 | msr_info->data = vcpu->kvm->arch.wall_clock; |
18068523 GOC |
2796 | break; |
2797 | case MSR_KVM_SYSTEM_TIME: | |
11c6bffa | 2798 | case MSR_KVM_SYSTEM_TIME_NEW: |
609e36d3 | 2799 | msr_info->data = vcpu->arch.time; |
18068523 | 2800 | break; |
344d9588 | 2801 | case MSR_KVM_ASYNC_PF_EN: |
609e36d3 | 2802 | msr_info->data = vcpu->arch.apf.msr_val; |
344d9588 | 2803 | break; |
c9aaa895 | 2804 | case MSR_KVM_STEAL_TIME: |
609e36d3 | 2805 | msr_info->data = vcpu->arch.st.msr_val; |
c9aaa895 | 2806 | break; |
1d92128f | 2807 | case MSR_KVM_PV_EOI_EN: |
609e36d3 | 2808 | msr_info->data = vcpu->arch.pv_eoi.msr_val; |
1d92128f | 2809 | break; |
890ca9ae HY |
2810 | case MSR_IA32_P5_MC_ADDR: |
2811 | case MSR_IA32_P5_MC_TYPE: | |
2812 | case MSR_IA32_MCG_CAP: | |
2813 | case MSR_IA32_MCG_CTL: | |
2814 | case MSR_IA32_MCG_STATUS: | |
81760dcc | 2815 | case MSR_IA32_MC0_CTL ... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS) - 1: |
44883f01 PB |
2816 | return get_msr_mce(vcpu, msr_info->index, &msr_info->data, |
2817 | msr_info->host_initiated); | |
84e0cefa JS |
2818 | case MSR_K7_CLK_CTL: |
2819 | /* | |
2820 | * Provide expected ramp-up count for K7. All other | |
2821 | * are set to zero, indicating minimum divisors for | |
2822 | * every field. | |
2823 | * | |
2824 | * This prevents guest kernels on AMD host with CPU | |
2825 | * type 6, model 8 and higher from exploding due to | |
2826 | * the rdmsr failing. | |
2827 | */ | |
609e36d3 | 2828 | msr_info->data = 0x20000000; |
84e0cefa | 2829 | break; |
55cd8e5a | 2830 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
e7d9513b AS |
2831 | case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: |
2832 | case HV_X64_MSR_CRASH_CTL: | |
1f4b34f8 | 2833 | case HV_X64_MSR_STIMER0_CONFIG ... HV_X64_MSR_STIMER3_COUNT: |
a2e164e7 VK |
2834 | case HV_X64_MSR_REENLIGHTENMENT_CONTROL: |
2835 | case HV_X64_MSR_TSC_EMULATION_CONTROL: | |
2836 | case HV_X64_MSR_TSC_EMULATION_STATUS: | |
e83d5887 | 2837 | return kvm_hv_get_msr_common(vcpu, |
44883f01 PB |
2838 | msr_info->index, &msr_info->data, |
2839 | msr_info->host_initiated); | |
55cd8e5a | 2840 | break; |
91c9c3ed | 2841 | case MSR_IA32_BBL_CR_CTL3: |
2842 | /* This legacy MSR exists but isn't fully documented in current | |
2843 | * silicon. It is however accessed by winxp in very narrow | |
2844 | * scenarios where it sets bit #19, itself documented as | |
2845 | * a "reserved" bit. Best effort attempt to source coherent | |
2846 | * read data here should the balance of the register be | |
2847 | * interpreted by the guest: | |
2848 | * | |
2849 | * L2 cache control register 3: 64GB range, 256KB size, | |
2850 | * enabled, latency 0x1, configured | |
2851 | */ | |
609e36d3 | 2852 | msr_info->data = 0xbe702111; |
91c9c3ed | 2853 | break; |
2b036c6b | 2854 | case MSR_AMD64_OSVW_ID_LENGTH: |
d6321d49 | 2855 | if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW)) |
2b036c6b | 2856 | return 1; |
609e36d3 | 2857 | msr_info->data = vcpu->arch.osvw.length; |
2b036c6b BO |
2858 | break; |
2859 | case MSR_AMD64_OSVW_STATUS: | |
d6321d49 | 2860 | if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW)) |
2b036c6b | 2861 | return 1; |
609e36d3 | 2862 | msr_info->data = vcpu->arch.osvw.status; |
2b036c6b | 2863 | break; |
db2336a8 | 2864 | case MSR_PLATFORM_INFO: |
6fbbde9a DS |
2865 | if (!msr_info->host_initiated && |
2866 | !vcpu->kvm->arch.guest_can_read_msr_platform_info) | |
2867 | return 1; | |
db2336a8 KH |
2868 | msr_info->data = vcpu->arch.msr_platform_info; |
2869 | break; | |
2870 | case MSR_MISC_FEATURES_ENABLES: | |
2871 | msr_info->data = vcpu->arch.msr_misc_features_enables; | |
2872 | break; | |
15c4a640 | 2873 | default: |
c6702c9d | 2874 | if (kvm_pmu_is_valid_msr(vcpu, msr_info->index)) |
609e36d3 | 2875 | return kvm_pmu_get_msr(vcpu, msr_info->index, &msr_info->data); |
ed85c068 | 2876 | if (!ignore_msrs) { |
ae0f5499 BD |
2877 | vcpu_debug_ratelimited(vcpu, "unhandled rdmsr: 0x%x\n", |
2878 | msr_info->index); | |
ed85c068 AP |
2879 | return 1; |
2880 | } else { | |
fab0aa3b EM |
2881 | if (report_ignored_msrs) |
2882 | vcpu_unimpl(vcpu, "ignored rdmsr: 0x%x\n", | |
2883 | msr_info->index); | |
609e36d3 | 2884 | msr_info->data = 0; |
ed85c068 AP |
2885 | } |
2886 | break; | |
15c4a640 | 2887 | } |
15c4a640 CO |
2888 | return 0; |
2889 | } | |
2890 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
2891 | ||
313a3dc7 CO |
2892 | /* |
2893 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
2894 | * | |
2895 | * @return number of msrs set successfully. | |
2896 | */ | |
2897 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
2898 | struct kvm_msr_entry *entries, | |
2899 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2900 | unsigned index, u64 *data)) | |
2901 | { | |
801e459a | 2902 | int i; |
313a3dc7 | 2903 | |
313a3dc7 CO |
2904 | for (i = 0; i < msrs->nmsrs; ++i) |
2905 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2906 | break; | |
2907 | ||
313a3dc7 CO |
2908 | return i; |
2909 | } | |
2910 | ||
2911 | /* | |
2912 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2913 | * | |
2914 | * @return number of msrs set successfully. | |
2915 | */ | |
2916 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
2917 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2918 | unsigned index, u64 *data), | |
2919 | int writeback) | |
2920 | { | |
2921 | struct kvm_msrs msrs; | |
2922 | struct kvm_msr_entry *entries; | |
2923 | int r, n; | |
2924 | unsigned size; | |
2925 | ||
2926 | r = -EFAULT; | |
0e96f31e | 2927 | if (copy_from_user(&msrs, user_msrs, sizeof(msrs))) |
313a3dc7 CO |
2928 | goto out; |
2929 | ||
2930 | r = -E2BIG; | |
2931 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2932 | goto out; | |
2933 | ||
313a3dc7 | 2934 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; |
ff5c2c03 SL |
2935 | entries = memdup_user(user_msrs->entries, size); |
2936 | if (IS_ERR(entries)) { | |
2937 | r = PTR_ERR(entries); | |
313a3dc7 | 2938 | goto out; |
ff5c2c03 | 2939 | } |
313a3dc7 CO |
2940 | |
2941 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
2942 | if (r < 0) | |
2943 | goto out_free; | |
2944 | ||
2945 | r = -EFAULT; | |
2946 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2947 | goto out_free; | |
2948 | ||
2949 | r = n; | |
2950 | ||
2951 | out_free: | |
7a73c028 | 2952 | kfree(entries); |
313a3dc7 CO |
2953 | out: |
2954 | return r; | |
2955 | } | |
2956 | ||
4d5422ce WL |
2957 | static inline bool kvm_can_mwait_in_guest(void) |
2958 | { | |
2959 | return boot_cpu_has(X86_FEATURE_MWAIT) && | |
8e9b29b6 KA |
2960 | !boot_cpu_has_bug(X86_BUG_MONITOR) && |
2961 | boot_cpu_has(X86_FEATURE_ARAT); | |
4d5422ce WL |
2962 | } |
2963 | ||
784aa3d7 | 2964 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
018d00d2 | 2965 | { |
4d5422ce | 2966 | int r = 0; |
018d00d2 ZX |
2967 | |
2968 | switch (ext) { | |
2969 | case KVM_CAP_IRQCHIP: | |
2970 | case KVM_CAP_HLT: | |
2971 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 2972 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 2973 | case KVM_CAP_EXT_CPUID: |
9c15bb1d | 2974 | case KVM_CAP_EXT_EMUL_CPUID: |
c8076604 | 2975 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 2976 | case KVM_CAP_PIT: |
a28e4f5a | 2977 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 2978 | case KVM_CAP_MP_STATE: |
ed848624 | 2979 | case KVM_CAP_SYNC_MMU: |
a355c85c | 2980 | case KVM_CAP_USER_NMI: |
52d939a0 | 2981 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 2982 | case KVM_CAP_IRQ_INJECT_STATUS: |
d34e6b17 | 2983 | case KVM_CAP_IOEVENTFD: |
f848a5a8 | 2984 | case KVM_CAP_IOEVENTFD_NO_LENGTH: |
c5ff41ce | 2985 | case KVM_CAP_PIT2: |
e9f42757 | 2986 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 2987 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 2988 | case KVM_CAP_XEN_HVM: |
3cfc3092 | 2989 | case KVM_CAP_VCPU_EVENTS: |
55cd8e5a | 2990 | case KVM_CAP_HYPERV: |
10388a07 | 2991 | case KVM_CAP_HYPERV_VAPIC: |
c25bc163 | 2992 | case KVM_CAP_HYPERV_SPIN: |
5c919412 | 2993 | case KVM_CAP_HYPERV_SYNIC: |
efc479e6 | 2994 | case KVM_CAP_HYPERV_SYNIC2: |
d3457c87 | 2995 | case KVM_CAP_HYPERV_VP_INDEX: |
faeb7833 | 2996 | case KVM_CAP_HYPERV_EVENTFD: |
c1aea919 | 2997 | case KVM_CAP_HYPERV_TLBFLUSH: |
214ff83d | 2998 | case KVM_CAP_HYPERV_SEND_IPI: |
57b119da | 2999 | case KVM_CAP_HYPERV_ENLIGHTENED_VMCS: |
2bc39970 | 3000 | case KVM_CAP_HYPERV_CPUID: |
ab9f4ecb | 3001 | case KVM_CAP_PCI_SEGMENT: |
a1efbe77 | 3002 | case KVM_CAP_DEBUGREGS: |
d2be1651 | 3003 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
2d5b5a66 | 3004 | case KVM_CAP_XSAVE: |
344d9588 | 3005 | case KVM_CAP_ASYNC_PF: |
92a1f12d | 3006 | case KVM_CAP_GET_TSC_KHZ: |
1c0b28c2 | 3007 | case KVM_CAP_KVMCLOCK_CTRL: |
4d8b81ab | 3008 | case KVM_CAP_READONLY_MEM: |
5f66b620 | 3009 | case KVM_CAP_HYPERV_TIME: |
100943c5 | 3010 | case KVM_CAP_IOAPIC_POLARITY_IGNORED: |
defcf51f | 3011 | case KVM_CAP_TSC_DEADLINE_TIMER: |
90de4a18 | 3012 | case KVM_CAP_DISABLE_QUIRKS: |
d71ba788 | 3013 | case KVM_CAP_SET_BOOT_CPU_ID: |
49df6397 | 3014 | case KVM_CAP_SPLIT_IRQCHIP: |
460df4c1 | 3015 | case KVM_CAP_IMMEDIATE_EXIT: |
801e459a | 3016 | case KVM_CAP_GET_MSR_FEATURES: |
6fbbde9a | 3017 | case KVM_CAP_MSR_PLATFORM_INFO: |
c4f55198 | 3018 | case KVM_CAP_EXCEPTION_PAYLOAD: |
018d00d2 ZX |
3019 | r = 1; |
3020 | break; | |
01643c51 KH |
3021 | case KVM_CAP_SYNC_REGS: |
3022 | r = KVM_SYNC_X86_VALID_FIELDS; | |
3023 | break; | |
e3fd9a93 PB |
3024 | case KVM_CAP_ADJUST_CLOCK: |
3025 | r = KVM_CLOCK_TSC_STABLE; | |
3026 | break; | |
4d5422ce | 3027 | case KVM_CAP_X86_DISABLE_EXITS: |
766d3571 | 3028 | r |= KVM_X86_DISABLE_EXITS_HLT | KVM_X86_DISABLE_EXITS_PAUSE; |
4d5422ce WL |
3029 | if(kvm_can_mwait_in_guest()) |
3030 | r |= KVM_X86_DISABLE_EXITS_MWAIT; | |
668fffa3 | 3031 | break; |
6d396b55 PB |
3032 | case KVM_CAP_X86_SMM: |
3033 | /* SMBASE is usually relocated above 1M on modern chipsets, | |
3034 | * and SMM handlers might indeed rely on 4G segment limits, | |
3035 | * so do not report SMM to be available if real mode is | |
3036 | * emulated via vm86 mode. Still, do not go to great lengths | |
3037 | * to avoid userspace's usage of the feature, because it is a | |
3038 | * fringe case that is not enabled except via specific settings | |
3039 | * of the module parameters. | |
3040 | */ | |
bc226f07 | 3041 | r = kvm_x86_ops->has_emulated_msr(MSR_IA32_SMBASE); |
6d396b55 | 3042 | break; |
774ead3a AK |
3043 | case KVM_CAP_VAPIC: |
3044 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
3045 | break; | |
f725230a | 3046 | case KVM_CAP_NR_VCPUS: |
8c3ba334 SL |
3047 | r = KVM_SOFT_MAX_VCPUS; |
3048 | break; | |
3049 | case KVM_CAP_MAX_VCPUS: | |
f725230a AK |
3050 | r = KVM_MAX_VCPUS; |
3051 | break; | |
a988b910 | 3052 | case KVM_CAP_NR_MEMSLOTS: |
bbacc0c1 | 3053 | r = KVM_USER_MEM_SLOTS; |
a988b910 | 3054 | break; |
a68a6a72 MT |
3055 | case KVM_CAP_PV_MMU: /* obsolete */ |
3056 | r = 0; | |
2f333bcb | 3057 | break; |
890ca9ae HY |
3058 | case KVM_CAP_MCE: |
3059 | r = KVM_MAX_MCE_BANKS; | |
3060 | break; | |
2d5b5a66 | 3061 | case KVM_CAP_XCRS: |
d366bf7e | 3062 | r = boot_cpu_has(X86_FEATURE_XSAVE); |
2d5b5a66 | 3063 | break; |
92a1f12d JR |
3064 | case KVM_CAP_TSC_CONTROL: |
3065 | r = kvm_has_tsc_control; | |
3066 | break; | |
37131313 RK |
3067 | case KVM_CAP_X2APIC_API: |
3068 | r = KVM_X2APIC_API_VALID_FLAGS; | |
3069 | break; | |
8fcc4b59 JM |
3070 | case KVM_CAP_NESTED_STATE: |
3071 | r = kvm_x86_ops->get_nested_state ? | |
3072 | kvm_x86_ops->get_nested_state(NULL, 0, 0) : 0; | |
3073 | break; | |
018d00d2 | 3074 | default: |
018d00d2 ZX |
3075 | break; |
3076 | } | |
3077 | return r; | |
3078 | ||
3079 | } | |
3080 | ||
043405e1 CO |
3081 | long kvm_arch_dev_ioctl(struct file *filp, |
3082 | unsigned int ioctl, unsigned long arg) | |
3083 | { | |
3084 | void __user *argp = (void __user *)arg; | |
3085 | long r; | |
3086 | ||
3087 | switch (ioctl) { | |
3088 | case KVM_GET_MSR_INDEX_LIST: { | |
3089 | struct kvm_msr_list __user *user_msr_list = argp; | |
3090 | struct kvm_msr_list msr_list; | |
3091 | unsigned n; | |
3092 | ||
3093 | r = -EFAULT; | |
0e96f31e | 3094 | if (copy_from_user(&msr_list, user_msr_list, sizeof(msr_list))) |
043405e1 CO |
3095 | goto out; |
3096 | n = msr_list.nmsrs; | |
62ef68bb | 3097 | msr_list.nmsrs = num_msrs_to_save + num_emulated_msrs; |
0e96f31e | 3098 | if (copy_to_user(user_msr_list, &msr_list, sizeof(msr_list))) |
043405e1 CO |
3099 | goto out; |
3100 | r = -E2BIG; | |
e125e7b6 | 3101 | if (n < msr_list.nmsrs) |
043405e1 CO |
3102 | goto out; |
3103 | r = -EFAULT; | |
3104 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
3105 | num_msrs_to_save * sizeof(u32))) | |
3106 | goto out; | |
e125e7b6 | 3107 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 | 3108 | &emulated_msrs, |
62ef68bb | 3109 | num_emulated_msrs * sizeof(u32))) |
043405e1 CO |
3110 | goto out; |
3111 | r = 0; | |
3112 | break; | |
3113 | } | |
9c15bb1d BP |
3114 | case KVM_GET_SUPPORTED_CPUID: |
3115 | case KVM_GET_EMULATED_CPUID: { | |
674eea0f AK |
3116 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
3117 | struct kvm_cpuid2 cpuid; | |
3118 | ||
3119 | r = -EFAULT; | |
0e96f31e | 3120 | if (copy_from_user(&cpuid, cpuid_arg, sizeof(cpuid))) |
674eea0f | 3121 | goto out; |
9c15bb1d BP |
3122 | |
3123 | r = kvm_dev_ioctl_get_cpuid(&cpuid, cpuid_arg->entries, | |
3124 | ioctl); | |
674eea0f AK |
3125 | if (r) |
3126 | goto out; | |
3127 | ||
3128 | r = -EFAULT; | |
0e96f31e | 3129 | if (copy_to_user(cpuid_arg, &cpuid, sizeof(cpuid))) |
674eea0f AK |
3130 | goto out; |
3131 | r = 0; | |
3132 | break; | |
3133 | } | |
890ca9ae | 3134 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
890ca9ae | 3135 | r = -EFAULT; |
c45dcc71 AR |
3136 | if (copy_to_user(argp, &kvm_mce_cap_supported, |
3137 | sizeof(kvm_mce_cap_supported))) | |
890ca9ae HY |
3138 | goto out; |
3139 | r = 0; | |
3140 | break; | |
801e459a TL |
3141 | case KVM_GET_MSR_FEATURE_INDEX_LIST: { |
3142 | struct kvm_msr_list __user *user_msr_list = argp; | |
3143 | struct kvm_msr_list msr_list; | |
3144 | unsigned int n; | |
3145 | ||
3146 | r = -EFAULT; | |
3147 | if (copy_from_user(&msr_list, user_msr_list, sizeof(msr_list))) | |
3148 | goto out; | |
3149 | n = msr_list.nmsrs; | |
3150 | msr_list.nmsrs = num_msr_based_features; | |
3151 | if (copy_to_user(user_msr_list, &msr_list, sizeof(msr_list))) | |
3152 | goto out; | |
3153 | r = -E2BIG; | |
3154 | if (n < msr_list.nmsrs) | |
3155 | goto out; | |
3156 | r = -EFAULT; | |
3157 | if (copy_to_user(user_msr_list->indices, &msr_based_features, | |
3158 | num_msr_based_features * sizeof(u32))) | |
3159 | goto out; | |
3160 | r = 0; | |
3161 | break; | |
3162 | } | |
3163 | case KVM_GET_MSRS: | |
3164 | r = msr_io(NULL, argp, do_get_msr_feature, 1); | |
3165 | break; | |
890ca9ae | 3166 | } |
043405e1 CO |
3167 | default: |
3168 | r = -EINVAL; | |
3169 | } | |
3170 | out: | |
3171 | return r; | |
3172 | } | |
3173 | ||
f5f48ee1 SY |
3174 | static void wbinvd_ipi(void *garbage) |
3175 | { | |
3176 | wbinvd(); | |
3177 | } | |
3178 | ||
3179 | static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
3180 | { | |
e0f0bbc5 | 3181 | return kvm_arch_has_noncoherent_dma(vcpu->kvm); |
f5f48ee1 SY |
3182 | } |
3183 | ||
313a3dc7 CO |
3184 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
3185 | { | |
f5f48ee1 SY |
3186 | /* Address WBINVD may be executed by guest */ |
3187 | if (need_emulate_wbinvd(vcpu)) { | |
3188 | if (kvm_x86_ops->has_wbinvd_exit()) | |
3189 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
3190 | else if (vcpu->cpu != -1 && vcpu->cpu != cpu) | |
3191 | smp_call_function_single(vcpu->cpu, | |
3192 | wbinvd_ipi, NULL, 1); | |
3193 | } | |
3194 | ||
313a3dc7 | 3195 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
8f6055cb | 3196 | |
0dd6a6ed ZA |
3197 | /* Apply any externally detected TSC adjustments (due to suspend) */ |
3198 | if (unlikely(vcpu->arch.tsc_offset_adjustment)) { | |
3199 | adjust_tsc_offset_host(vcpu, vcpu->arch.tsc_offset_adjustment); | |
3200 | vcpu->arch.tsc_offset_adjustment = 0; | |
105b21bb | 3201 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0dd6a6ed | 3202 | } |
8f6055cb | 3203 | |
b0c39dc6 | 3204 | if (unlikely(vcpu->cpu != cpu) || kvm_check_tsc_unstable()) { |
6f526ec5 | 3205 | s64 tsc_delta = !vcpu->arch.last_host_tsc ? 0 : |
4ea1636b | 3206 | rdtsc() - vcpu->arch.last_host_tsc; |
e48672fa ZA |
3207 | if (tsc_delta < 0) |
3208 | mark_tsc_unstable("KVM discovered backwards TSC"); | |
ce7a058a | 3209 | |
b0c39dc6 | 3210 | if (kvm_check_tsc_unstable()) { |
07c1419a | 3211 | u64 offset = kvm_compute_tsc_offset(vcpu, |
b183aa58 | 3212 | vcpu->arch.last_guest_tsc); |
a545ab6a | 3213 | kvm_vcpu_write_tsc_offset(vcpu, offset); |
c285545f | 3214 | vcpu->arch.tsc_catchup = 1; |
c285545f | 3215 | } |
a749e247 PB |
3216 | |
3217 | if (kvm_lapic_hv_timer_in_use(vcpu)) | |
3218 | kvm_lapic_restart_hv_timer(vcpu); | |
3219 | ||
d98d07ca MT |
3220 | /* |
3221 | * On a host with synchronized TSC, there is no need to update | |
3222 | * kvmclock on vcpu->cpu migration | |
3223 | */ | |
3224 | if (!vcpu->kvm->arch.use_master_clock || vcpu->cpu == -1) | |
0061d53d | 3225 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
c285545f | 3226 | if (vcpu->cpu != cpu) |
1bd2009e | 3227 | kvm_make_request(KVM_REQ_MIGRATE_TIMER, vcpu); |
e48672fa | 3228 | vcpu->cpu = cpu; |
6b7d7e76 | 3229 | } |
c9aaa895 | 3230 | |
c9aaa895 | 3231 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); |
313a3dc7 CO |
3232 | } |
3233 | ||
0b9f6c46 PX |
3234 | static void kvm_steal_time_set_preempted(struct kvm_vcpu *vcpu) |
3235 | { | |
3236 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
3237 | return; | |
3238 | ||
fa55eedd | 3239 | vcpu->arch.st.steal.preempted = KVM_VCPU_PREEMPTED; |
0b9f6c46 | 3240 | |
4e335d9e | 3241 | kvm_write_guest_offset_cached(vcpu->kvm, &vcpu->arch.st.stime, |
0b9f6c46 PX |
3242 | &vcpu->arch.st.steal.preempted, |
3243 | offsetof(struct kvm_steal_time, preempted), | |
3244 | sizeof(vcpu->arch.st.steal.preempted)); | |
3245 | } | |
3246 | ||
313a3dc7 CO |
3247 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
3248 | { | |
cc0d907c | 3249 | int idx; |
de63ad4c LM |
3250 | |
3251 | if (vcpu->preempted) | |
3252 | vcpu->arch.preempted_in_kernel = !kvm_x86_ops->get_cpl(vcpu); | |
3253 | ||
931f261b AA |
3254 | /* |
3255 | * Disable page faults because we're in atomic context here. | |
3256 | * kvm_write_guest_offset_cached() would call might_fault() | |
3257 | * that relies on pagefault_disable() to tell if there's a | |
3258 | * bug. NOTE: the write to guest memory may not go through if | |
3259 | * during postcopy live migration or if there's heavy guest | |
3260 | * paging. | |
3261 | */ | |
3262 | pagefault_disable(); | |
cc0d907c AA |
3263 | /* |
3264 | * kvm_memslots() will be called by | |
3265 | * kvm_write_guest_offset_cached() so take the srcu lock. | |
3266 | */ | |
3267 | idx = srcu_read_lock(&vcpu->kvm->srcu); | |
0b9f6c46 | 3268 | kvm_steal_time_set_preempted(vcpu); |
cc0d907c | 3269 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
931f261b | 3270 | pagefault_enable(); |
02daab21 | 3271 | kvm_x86_ops->vcpu_put(vcpu); |
4ea1636b | 3272 | vcpu->arch.last_host_tsc = rdtsc(); |
efdab992 | 3273 | /* |
f9dcf08e RK |
3274 | * If userspace has set any breakpoints or watchpoints, dr6 is restored |
3275 | * on every vmexit, but if not, we might have a stale dr6 from the | |
3276 | * guest. do_debug expects dr6 to be cleared after it runs, do the same. | |
efdab992 | 3277 | */ |
f9dcf08e | 3278 | set_debugreg(0, 6); |
313a3dc7 CO |
3279 | } |
3280 | ||
313a3dc7 CO |
3281 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
3282 | struct kvm_lapic_state *s) | |
3283 | { | |
fa59cc00 | 3284 | if (vcpu->arch.apicv_active) |
d62caabb AS |
3285 | kvm_x86_ops->sync_pir_to_irr(vcpu); |
3286 | ||
a92e2543 | 3287 | return kvm_apic_get_state(vcpu, s); |
313a3dc7 CO |
3288 | } |
3289 | ||
3290 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
3291 | struct kvm_lapic_state *s) | |
3292 | { | |
a92e2543 RK |
3293 | int r; |
3294 | ||
3295 | r = kvm_apic_set_state(vcpu, s); | |
3296 | if (r) | |
3297 | return r; | |
cb142eb7 | 3298 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
3299 | |
3300 | return 0; | |
3301 | } | |
3302 | ||
127a457a MG |
3303 | static int kvm_cpu_accept_dm_intr(struct kvm_vcpu *vcpu) |
3304 | { | |
3305 | return (!lapic_in_kernel(vcpu) || | |
3306 | kvm_apic_accept_pic_intr(vcpu)); | |
3307 | } | |
3308 | ||
782d422b MG |
3309 | /* |
3310 | * if userspace requested an interrupt window, check that the | |
3311 | * interrupt window is open. | |
3312 | * | |
3313 | * No need to exit to userspace if we already have an interrupt queued. | |
3314 | */ | |
3315 | static int kvm_vcpu_ready_for_interrupt_injection(struct kvm_vcpu *vcpu) | |
3316 | { | |
3317 | return kvm_arch_interrupt_allowed(vcpu) && | |
3318 | !kvm_cpu_has_interrupt(vcpu) && | |
3319 | !kvm_event_needs_reinjection(vcpu) && | |
3320 | kvm_cpu_accept_dm_intr(vcpu); | |
3321 | } | |
3322 | ||
f77bc6a4 ZX |
3323 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
3324 | struct kvm_interrupt *irq) | |
3325 | { | |
02cdb50f | 3326 | if (irq->irq >= KVM_NR_INTERRUPTS) |
f77bc6a4 | 3327 | return -EINVAL; |
1c1a9ce9 SR |
3328 | |
3329 | if (!irqchip_in_kernel(vcpu->kvm)) { | |
3330 | kvm_queue_interrupt(vcpu, irq->irq, false); | |
3331 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
3332 | return 0; | |
3333 | } | |
3334 | ||
3335 | /* | |
3336 | * With in-kernel LAPIC, we only use this to inject EXTINT, so | |
3337 | * fail for in-kernel 8259. | |
3338 | */ | |
3339 | if (pic_in_kernel(vcpu->kvm)) | |
f77bc6a4 | 3340 | return -ENXIO; |
f77bc6a4 | 3341 | |
1c1a9ce9 SR |
3342 | if (vcpu->arch.pending_external_vector != -1) |
3343 | return -EEXIST; | |
f77bc6a4 | 3344 | |
1c1a9ce9 | 3345 | vcpu->arch.pending_external_vector = irq->irq; |
934bf653 | 3346 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f77bc6a4 ZX |
3347 | return 0; |
3348 | } | |
3349 | ||
c4abb7c9 JK |
3350 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
3351 | { | |
c4abb7c9 | 3352 | kvm_inject_nmi(vcpu); |
c4abb7c9 JK |
3353 | |
3354 | return 0; | |
3355 | } | |
3356 | ||
f077825a PB |
3357 | static int kvm_vcpu_ioctl_smi(struct kvm_vcpu *vcpu) |
3358 | { | |
64d60670 PB |
3359 | kvm_make_request(KVM_REQ_SMI, vcpu); |
3360 | ||
f077825a PB |
3361 | return 0; |
3362 | } | |
3363 | ||
b209749f AK |
3364 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
3365 | struct kvm_tpr_access_ctl *tac) | |
3366 | { | |
3367 | if (tac->flags) | |
3368 | return -EINVAL; | |
3369 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
3370 | return 0; | |
3371 | } | |
3372 | ||
890ca9ae HY |
3373 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
3374 | u64 mcg_cap) | |
3375 | { | |
3376 | int r; | |
3377 | unsigned bank_num = mcg_cap & 0xff, bank; | |
3378 | ||
3379 | r = -EINVAL; | |
a9e38c3e | 3380 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae | 3381 | goto out; |
c45dcc71 | 3382 | if (mcg_cap & ~(kvm_mce_cap_supported | 0xff | 0xff0000)) |
890ca9ae HY |
3383 | goto out; |
3384 | r = 0; | |
3385 | vcpu->arch.mcg_cap = mcg_cap; | |
3386 | /* Init IA32_MCG_CTL to all 1s */ | |
3387 | if (mcg_cap & MCG_CTL_P) | |
3388 | vcpu->arch.mcg_ctl = ~(u64)0; | |
3389 | /* Init IA32_MCi_CTL to all 1s */ | |
3390 | for (bank = 0; bank < bank_num; bank++) | |
3391 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
c45dcc71 AR |
3392 | |
3393 | if (kvm_x86_ops->setup_mce) | |
3394 | kvm_x86_ops->setup_mce(vcpu); | |
890ca9ae HY |
3395 | out: |
3396 | return r; | |
3397 | } | |
3398 | ||
3399 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
3400 | struct kvm_x86_mce *mce) | |
3401 | { | |
3402 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
3403 | unsigned bank_num = mcg_cap & 0xff; | |
3404 | u64 *banks = vcpu->arch.mce_banks; | |
3405 | ||
3406 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
3407 | return -EINVAL; | |
3408 | /* | |
3409 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
3410 | * reporting is disabled | |
3411 | */ | |
3412 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
3413 | vcpu->arch.mcg_ctl != ~(u64)0) | |
3414 | return 0; | |
3415 | banks += 4 * mce->bank; | |
3416 | /* | |
3417 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
3418 | * reporting is disabled for the bank | |
3419 | */ | |
3420 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
3421 | return 0; | |
3422 | if (mce->status & MCI_STATUS_UC) { | |
3423 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 3424 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
a8eeb04a | 3425 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
890ca9ae HY |
3426 | return 0; |
3427 | } | |
3428 | if (banks[1] & MCI_STATUS_VAL) | |
3429 | mce->status |= MCI_STATUS_OVER; | |
3430 | banks[2] = mce->addr; | |
3431 | banks[3] = mce->misc; | |
3432 | vcpu->arch.mcg_status = mce->mcg_status; | |
3433 | banks[1] = mce->status; | |
3434 | kvm_queue_exception(vcpu, MC_VECTOR); | |
3435 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
3436 | || !(banks[1] & MCI_STATUS_UC)) { | |
3437 | if (banks[1] & MCI_STATUS_VAL) | |
3438 | mce->status |= MCI_STATUS_OVER; | |
3439 | banks[2] = mce->addr; | |
3440 | banks[3] = mce->misc; | |
3441 | banks[1] = mce->status; | |
3442 | } else | |
3443 | banks[1] |= MCI_STATUS_OVER; | |
3444 | return 0; | |
3445 | } | |
3446 | ||
3cfc3092 JK |
3447 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
3448 | struct kvm_vcpu_events *events) | |
3449 | { | |
7460fb4a | 3450 | process_nmi(vcpu); |
59073aaf | 3451 | |
664f8e26 | 3452 | /* |
59073aaf JM |
3453 | * The API doesn't provide the instruction length for software |
3454 | * exceptions, so don't report them. As long as the guest RIP | |
3455 | * isn't advanced, we should expect to encounter the exception | |
3456 | * again. | |
664f8e26 | 3457 | */ |
59073aaf JM |
3458 | if (kvm_exception_is_soft(vcpu->arch.exception.nr)) { |
3459 | events->exception.injected = 0; | |
3460 | events->exception.pending = 0; | |
3461 | } else { | |
3462 | events->exception.injected = vcpu->arch.exception.injected; | |
3463 | events->exception.pending = vcpu->arch.exception.pending; | |
3464 | /* | |
3465 | * For ABI compatibility, deliberately conflate | |
3466 | * pending and injected exceptions when | |
3467 | * KVM_CAP_EXCEPTION_PAYLOAD isn't enabled. | |
3468 | */ | |
3469 | if (!vcpu->kvm->arch.exception_payload_enabled) | |
3470 | events->exception.injected |= | |
3471 | vcpu->arch.exception.pending; | |
3472 | } | |
3cfc3092 JK |
3473 | events->exception.nr = vcpu->arch.exception.nr; |
3474 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
3475 | events->exception.error_code = vcpu->arch.exception.error_code; | |
59073aaf JM |
3476 | events->exception_has_payload = vcpu->arch.exception.has_payload; |
3477 | events->exception_payload = vcpu->arch.exception.payload; | |
3cfc3092 | 3478 | |
03b82a30 | 3479 | events->interrupt.injected = |
04140b41 | 3480 | vcpu->arch.interrupt.injected && !vcpu->arch.interrupt.soft; |
3cfc3092 | 3481 | events->interrupt.nr = vcpu->arch.interrupt.nr; |
03b82a30 | 3482 | events->interrupt.soft = 0; |
37ccdcbe | 3483 | events->interrupt.shadow = kvm_x86_ops->get_interrupt_shadow(vcpu); |
3cfc3092 JK |
3484 | |
3485 | events->nmi.injected = vcpu->arch.nmi_injected; | |
7460fb4a | 3486 | events->nmi.pending = vcpu->arch.nmi_pending != 0; |
3cfc3092 | 3487 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); |
97e69aa6 | 3488 | events->nmi.pad = 0; |
3cfc3092 | 3489 | |
66450a21 | 3490 | events->sipi_vector = 0; /* never valid when reporting to user space */ |
3cfc3092 | 3491 | |
f077825a PB |
3492 | events->smi.smm = is_smm(vcpu); |
3493 | events->smi.pending = vcpu->arch.smi_pending; | |
3494 | events->smi.smm_inside_nmi = | |
3495 | !!(vcpu->arch.hflags & HF_SMM_INSIDE_NMI_MASK); | |
3496 | events->smi.latched_init = kvm_lapic_latched_init(vcpu); | |
3497 | ||
dab4b911 | 3498 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
f077825a PB |
3499 | | KVM_VCPUEVENT_VALID_SHADOW |
3500 | | KVM_VCPUEVENT_VALID_SMM); | |
59073aaf JM |
3501 | if (vcpu->kvm->arch.exception_payload_enabled) |
3502 | events->flags |= KVM_VCPUEVENT_VALID_PAYLOAD; | |
3503 | ||
97e69aa6 | 3504 | memset(&events->reserved, 0, sizeof(events->reserved)); |
3cfc3092 JK |
3505 | } |
3506 | ||
6ef4e07e XG |
3507 | static void kvm_set_hflags(struct kvm_vcpu *vcpu, unsigned emul_flags); |
3508 | ||
3cfc3092 JK |
3509 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, |
3510 | struct kvm_vcpu_events *events) | |
3511 | { | |
dab4b911 | 3512 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 | 3513 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
f077825a | 3514 | | KVM_VCPUEVENT_VALID_SHADOW |
59073aaf JM |
3515 | | KVM_VCPUEVENT_VALID_SMM |
3516 | | KVM_VCPUEVENT_VALID_PAYLOAD)) | |
3cfc3092 JK |
3517 | return -EINVAL; |
3518 | ||
59073aaf JM |
3519 | if (events->flags & KVM_VCPUEVENT_VALID_PAYLOAD) { |
3520 | if (!vcpu->kvm->arch.exception_payload_enabled) | |
3521 | return -EINVAL; | |
3522 | if (events->exception.pending) | |
3523 | events->exception.injected = 0; | |
3524 | else | |
3525 | events->exception_has_payload = 0; | |
3526 | } else { | |
3527 | events->exception.pending = 0; | |
3528 | events->exception_has_payload = 0; | |
3529 | } | |
3530 | ||
3531 | if ((events->exception.injected || events->exception.pending) && | |
3532 | (events->exception.nr > 31 || events->exception.nr == NMI_VECTOR)) | |
78e546c8 PB |
3533 | return -EINVAL; |
3534 | ||
28bf2888 DH |
3535 | /* INITs are latched while in SMM */ |
3536 | if (events->flags & KVM_VCPUEVENT_VALID_SMM && | |
3537 | (events->smi.smm || events->smi.pending) && | |
3538 | vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) | |
3539 | return -EINVAL; | |
3540 | ||
7460fb4a | 3541 | process_nmi(vcpu); |
59073aaf JM |
3542 | vcpu->arch.exception.injected = events->exception.injected; |
3543 | vcpu->arch.exception.pending = events->exception.pending; | |
3cfc3092 JK |
3544 | vcpu->arch.exception.nr = events->exception.nr; |
3545 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
3546 | vcpu->arch.exception.error_code = events->exception.error_code; | |
59073aaf JM |
3547 | vcpu->arch.exception.has_payload = events->exception_has_payload; |
3548 | vcpu->arch.exception.payload = events->exception_payload; | |
3cfc3092 | 3549 | |
04140b41 | 3550 | vcpu->arch.interrupt.injected = events->interrupt.injected; |
3cfc3092 JK |
3551 | vcpu->arch.interrupt.nr = events->interrupt.nr; |
3552 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
48005f64 JK |
3553 | if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) |
3554 | kvm_x86_ops->set_interrupt_shadow(vcpu, | |
3555 | events->interrupt.shadow); | |
3cfc3092 JK |
3556 | |
3557 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
3558 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
3559 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
3560 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
3561 | ||
66450a21 | 3562 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR && |
bce87cce | 3563 | lapic_in_kernel(vcpu)) |
66450a21 | 3564 | vcpu->arch.apic->sipi_vector = events->sipi_vector; |
3cfc3092 | 3565 | |
f077825a | 3566 | if (events->flags & KVM_VCPUEVENT_VALID_SMM) { |
6ef4e07e | 3567 | u32 hflags = vcpu->arch.hflags; |
f077825a | 3568 | if (events->smi.smm) |
6ef4e07e | 3569 | hflags |= HF_SMM_MASK; |
f077825a | 3570 | else |
6ef4e07e XG |
3571 | hflags &= ~HF_SMM_MASK; |
3572 | kvm_set_hflags(vcpu, hflags); | |
3573 | ||
f077825a | 3574 | vcpu->arch.smi_pending = events->smi.pending; |
f4ef1910 WL |
3575 | |
3576 | if (events->smi.smm) { | |
3577 | if (events->smi.smm_inside_nmi) | |
3578 | vcpu->arch.hflags |= HF_SMM_INSIDE_NMI_MASK; | |
f077825a | 3579 | else |
f4ef1910 WL |
3580 | vcpu->arch.hflags &= ~HF_SMM_INSIDE_NMI_MASK; |
3581 | if (lapic_in_kernel(vcpu)) { | |
3582 | if (events->smi.latched_init) | |
3583 | set_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); | |
3584 | else | |
3585 | clear_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); | |
3586 | } | |
f077825a PB |
3587 | } |
3588 | } | |
3589 | ||
3842d135 AK |
3590 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
3591 | ||
3cfc3092 JK |
3592 | return 0; |
3593 | } | |
3594 | ||
a1efbe77 JK |
3595 | static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, |
3596 | struct kvm_debugregs *dbgregs) | |
3597 | { | |
73aaf249 JK |
3598 | unsigned long val; |
3599 | ||
a1efbe77 | 3600 | memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db)); |
16f8a6f9 | 3601 | kvm_get_dr(vcpu, 6, &val); |
73aaf249 | 3602 | dbgregs->dr6 = val; |
a1efbe77 JK |
3603 | dbgregs->dr7 = vcpu->arch.dr7; |
3604 | dbgregs->flags = 0; | |
97e69aa6 | 3605 | memset(&dbgregs->reserved, 0, sizeof(dbgregs->reserved)); |
a1efbe77 JK |
3606 | } |
3607 | ||
3608 | static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, | |
3609 | struct kvm_debugregs *dbgregs) | |
3610 | { | |
3611 | if (dbgregs->flags) | |
3612 | return -EINVAL; | |
3613 | ||
d14bdb55 PB |
3614 | if (dbgregs->dr6 & ~0xffffffffull) |
3615 | return -EINVAL; | |
3616 | if (dbgregs->dr7 & ~0xffffffffull) | |
3617 | return -EINVAL; | |
3618 | ||
a1efbe77 | 3619 | memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db)); |
ae561ede | 3620 | kvm_update_dr0123(vcpu); |
a1efbe77 | 3621 | vcpu->arch.dr6 = dbgregs->dr6; |
73aaf249 | 3622 | kvm_update_dr6(vcpu); |
a1efbe77 | 3623 | vcpu->arch.dr7 = dbgregs->dr7; |
9926c9fd | 3624 | kvm_update_dr7(vcpu); |
a1efbe77 | 3625 | |
a1efbe77 JK |
3626 | return 0; |
3627 | } | |
3628 | ||
df1daba7 PB |
3629 | #define XSTATE_COMPACTION_ENABLED (1ULL << 63) |
3630 | ||
3631 | static void fill_xsave(u8 *dest, struct kvm_vcpu *vcpu) | |
3632 | { | |
c47ada30 | 3633 | struct xregs_state *xsave = &vcpu->arch.guest_fpu.state.xsave; |
400e4b20 | 3634 | u64 xstate_bv = xsave->header.xfeatures; |
df1daba7 PB |
3635 | u64 valid; |
3636 | ||
3637 | /* | |
3638 | * Copy legacy XSAVE area, to avoid complications with CPUID | |
3639 | * leaves 0 and 1 in the loop below. | |
3640 | */ | |
3641 | memcpy(dest, xsave, XSAVE_HDR_OFFSET); | |
3642 | ||
3643 | /* Set XSTATE_BV */ | |
00c87e9a | 3644 | xstate_bv &= vcpu->arch.guest_supported_xcr0 | XFEATURE_MASK_FPSSE; |
df1daba7 PB |
3645 | *(u64 *)(dest + XSAVE_HDR_OFFSET) = xstate_bv; |
3646 | ||
3647 | /* | |
3648 | * Copy each region from the possibly compacted offset to the | |
3649 | * non-compacted offset. | |
3650 | */ | |
d91cab78 | 3651 | valid = xstate_bv & ~XFEATURE_MASK_FPSSE; |
df1daba7 PB |
3652 | while (valid) { |
3653 | u64 feature = valid & -valid; | |
3654 | int index = fls64(feature) - 1; | |
3655 | void *src = get_xsave_addr(xsave, feature); | |
3656 | ||
3657 | if (src) { | |
3658 | u32 size, offset, ecx, edx; | |
3659 | cpuid_count(XSTATE_CPUID, index, | |
3660 | &size, &offset, &ecx, &edx); | |
38cfd5e3 PB |
3661 | if (feature == XFEATURE_MASK_PKRU) |
3662 | memcpy(dest + offset, &vcpu->arch.pkru, | |
3663 | sizeof(vcpu->arch.pkru)); | |
3664 | else | |
3665 | memcpy(dest + offset, src, size); | |
3666 | ||
df1daba7 PB |
3667 | } |
3668 | ||
3669 | valid -= feature; | |
3670 | } | |
3671 | } | |
3672 | ||
3673 | static void load_xsave(struct kvm_vcpu *vcpu, u8 *src) | |
3674 | { | |
c47ada30 | 3675 | struct xregs_state *xsave = &vcpu->arch.guest_fpu.state.xsave; |
df1daba7 PB |
3676 | u64 xstate_bv = *(u64 *)(src + XSAVE_HDR_OFFSET); |
3677 | u64 valid; | |
3678 | ||
3679 | /* | |
3680 | * Copy legacy XSAVE area, to avoid complications with CPUID | |
3681 | * leaves 0 and 1 in the loop below. | |
3682 | */ | |
3683 | memcpy(xsave, src, XSAVE_HDR_OFFSET); | |
3684 | ||
3685 | /* Set XSTATE_BV and possibly XCOMP_BV. */ | |
400e4b20 | 3686 | xsave->header.xfeatures = xstate_bv; |
782511b0 | 3687 | if (boot_cpu_has(X86_FEATURE_XSAVES)) |
3a54450b | 3688 | xsave->header.xcomp_bv = host_xcr0 | XSTATE_COMPACTION_ENABLED; |
df1daba7 PB |
3689 | |
3690 | /* | |
3691 | * Copy each region from the non-compacted offset to the | |
3692 | * possibly compacted offset. | |
3693 | */ | |
d91cab78 | 3694 | valid = xstate_bv & ~XFEATURE_MASK_FPSSE; |
df1daba7 PB |
3695 | while (valid) { |
3696 | u64 feature = valid & -valid; | |
3697 | int index = fls64(feature) - 1; | |
3698 | void *dest = get_xsave_addr(xsave, feature); | |
3699 | ||
3700 | if (dest) { | |
3701 | u32 size, offset, ecx, edx; | |
3702 | cpuid_count(XSTATE_CPUID, index, | |
3703 | &size, &offset, &ecx, &edx); | |
38cfd5e3 PB |
3704 | if (feature == XFEATURE_MASK_PKRU) |
3705 | memcpy(&vcpu->arch.pkru, src + offset, | |
3706 | sizeof(vcpu->arch.pkru)); | |
3707 | else | |
3708 | memcpy(dest, src + offset, size); | |
ee4100da | 3709 | } |
df1daba7 PB |
3710 | |
3711 | valid -= feature; | |
3712 | } | |
3713 | } | |
3714 | ||
2d5b5a66 SY |
3715 | static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu, |
3716 | struct kvm_xsave *guest_xsave) | |
3717 | { | |
d366bf7e | 3718 | if (boot_cpu_has(X86_FEATURE_XSAVE)) { |
df1daba7 PB |
3719 | memset(guest_xsave, 0, sizeof(struct kvm_xsave)); |
3720 | fill_xsave((u8 *) guest_xsave->region, vcpu); | |
4344ee98 | 3721 | } else { |
2d5b5a66 | 3722 | memcpy(guest_xsave->region, |
7366ed77 | 3723 | &vcpu->arch.guest_fpu.state.fxsave, |
c47ada30 | 3724 | sizeof(struct fxregs_state)); |
2d5b5a66 | 3725 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] = |
d91cab78 | 3726 | XFEATURE_MASK_FPSSE; |
2d5b5a66 SY |
3727 | } |
3728 | } | |
3729 | ||
a575813b WL |
3730 | #define XSAVE_MXCSR_OFFSET 24 |
3731 | ||
2d5b5a66 SY |
3732 | static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu, |
3733 | struct kvm_xsave *guest_xsave) | |
3734 | { | |
3735 | u64 xstate_bv = | |
3736 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)]; | |
a575813b | 3737 | u32 mxcsr = *(u32 *)&guest_xsave->region[XSAVE_MXCSR_OFFSET / sizeof(u32)]; |
2d5b5a66 | 3738 | |
d366bf7e | 3739 | if (boot_cpu_has(X86_FEATURE_XSAVE)) { |
d7876f1b PB |
3740 | /* |
3741 | * Here we allow setting states that are not present in | |
3742 | * CPUID leaf 0xD, index 0, EDX:EAX. This is for compatibility | |
3743 | * with old userspace. | |
3744 | */ | |
a575813b WL |
3745 | if (xstate_bv & ~kvm_supported_xcr0() || |
3746 | mxcsr & ~mxcsr_feature_mask) | |
d7876f1b | 3747 | return -EINVAL; |
df1daba7 | 3748 | load_xsave(vcpu, (u8 *)guest_xsave->region); |
d7876f1b | 3749 | } else { |
a575813b WL |
3750 | if (xstate_bv & ~XFEATURE_MASK_FPSSE || |
3751 | mxcsr & ~mxcsr_feature_mask) | |
2d5b5a66 | 3752 | return -EINVAL; |
7366ed77 | 3753 | memcpy(&vcpu->arch.guest_fpu.state.fxsave, |
c47ada30 | 3754 | guest_xsave->region, sizeof(struct fxregs_state)); |
2d5b5a66 SY |
3755 | } |
3756 | return 0; | |
3757 | } | |
3758 | ||
3759 | static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu, | |
3760 | struct kvm_xcrs *guest_xcrs) | |
3761 | { | |
d366bf7e | 3762 | if (!boot_cpu_has(X86_FEATURE_XSAVE)) { |
2d5b5a66 SY |
3763 | guest_xcrs->nr_xcrs = 0; |
3764 | return; | |
3765 | } | |
3766 | ||
3767 | guest_xcrs->nr_xcrs = 1; | |
3768 | guest_xcrs->flags = 0; | |
3769 | guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK; | |
3770 | guest_xcrs->xcrs[0].value = vcpu->arch.xcr0; | |
3771 | } | |
3772 | ||
3773 | static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu, | |
3774 | struct kvm_xcrs *guest_xcrs) | |
3775 | { | |
3776 | int i, r = 0; | |
3777 | ||
d366bf7e | 3778 | if (!boot_cpu_has(X86_FEATURE_XSAVE)) |
2d5b5a66 SY |
3779 | return -EINVAL; |
3780 | ||
3781 | if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags) | |
3782 | return -EINVAL; | |
3783 | ||
3784 | for (i = 0; i < guest_xcrs->nr_xcrs; i++) | |
3785 | /* Only support XCR0 currently */ | |
c67a04cb | 3786 | if (guest_xcrs->xcrs[i].xcr == XCR_XFEATURE_ENABLED_MASK) { |
2d5b5a66 | 3787 | r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK, |
c67a04cb | 3788 | guest_xcrs->xcrs[i].value); |
2d5b5a66 SY |
3789 | break; |
3790 | } | |
3791 | if (r) | |
3792 | r = -EINVAL; | |
3793 | return r; | |
3794 | } | |
3795 | ||
1c0b28c2 EM |
3796 | /* |
3797 | * kvm_set_guest_paused() indicates to the guest kernel that it has been | |
3798 | * stopped by the hypervisor. This function will be called from the host only. | |
3799 | * EINVAL is returned when the host attempts to set the flag for a guest that | |
3800 | * does not support pv clocks. | |
3801 | */ | |
3802 | static int kvm_set_guest_paused(struct kvm_vcpu *vcpu) | |
3803 | { | |
0b79459b | 3804 | if (!vcpu->arch.pv_time_enabled) |
1c0b28c2 | 3805 | return -EINVAL; |
51d59c6b | 3806 | vcpu->arch.pvclock_set_guest_stopped_request = true; |
1c0b28c2 EM |
3807 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
3808 | return 0; | |
3809 | } | |
3810 | ||
5c919412 AS |
3811 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
3812 | struct kvm_enable_cap *cap) | |
3813 | { | |
57b119da VK |
3814 | int r; |
3815 | uint16_t vmcs_version; | |
3816 | void __user *user_ptr; | |
3817 | ||
5c919412 AS |
3818 | if (cap->flags) |
3819 | return -EINVAL; | |
3820 | ||
3821 | switch (cap->cap) { | |
efc479e6 RK |
3822 | case KVM_CAP_HYPERV_SYNIC2: |
3823 | if (cap->args[0]) | |
3824 | return -EINVAL; | |
5c919412 | 3825 | case KVM_CAP_HYPERV_SYNIC: |
546d87e5 WL |
3826 | if (!irqchip_in_kernel(vcpu->kvm)) |
3827 | return -EINVAL; | |
efc479e6 RK |
3828 | return kvm_hv_activate_synic(vcpu, cap->cap == |
3829 | KVM_CAP_HYPERV_SYNIC2); | |
57b119da | 3830 | case KVM_CAP_HYPERV_ENLIGHTENED_VMCS: |
5158917c SC |
3831 | if (!kvm_x86_ops->nested_enable_evmcs) |
3832 | return -ENOTTY; | |
57b119da VK |
3833 | r = kvm_x86_ops->nested_enable_evmcs(vcpu, &vmcs_version); |
3834 | if (!r) { | |
3835 | user_ptr = (void __user *)(uintptr_t)cap->args[0]; | |
3836 | if (copy_to_user(user_ptr, &vmcs_version, | |
3837 | sizeof(vmcs_version))) | |
3838 | r = -EFAULT; | |
3839 | } | |
3840 | return r; | |
3841 | ||
5c919412 AS |
3842 | default: |
3843 | return -EINVAL; | |
3844 | } | |
3845 | } | |
3846 | ||
313a3dc7 CO |
3847 | long kvm_arch_vcpu_ioctl(struct file *filp, |
3848 | unsigned int ioctl, unsigned long arg) | |
3849 | { | |
3850 | struct kvm_vcpu *vcpu = filp->private_data; | |
3851 | void __user *argp = (void __user *)arg; | |
3852 | int r; | |
d1ac91d8 AK |
3853 | union { |
3854 | struct kvm_lapic_state *lapic; | |
3855 | struct kvm_xsave *xsave; | |
3856 | struct kvm_xcrs *xcrs; | |
3857 | void *buffer; | |
3858 | } u; | |
3859 | ||
9b062471 CD |
3860 | vcpu_load(vcpu); |
3861 | ||
d1ac91d8 | 3862 | u.buffer = NULL; |
313a3dc7 CO |
3863 | switch (ioctl) { |
3864 | case KVM_GET_LAPIC: { | |
2204ae3c | 3865 | r = -EINVAL; |
bce87cce | 3866 | if (!lapic_in_kernel(vcpu)) |
2204ae3c | 3867 | goto out; |
d1ac91d8 | 3868 | u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 3869 | |
b772ff36 | 3870 | r = -ENOMEM; |
d1ac91d8 | 3871 | if (!u.lapic) |
b772ff36 | 3872 | goto out; |
d1ac91d8 | 3873 | r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3874 | if (r) |
3875 | goto out; | |
3876 | r = -EFAULT; | |
d1ac91d8 | 3877 | if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
3878 | goto out; |
3879 | r = 0; | |
3880 | break; | |
3881 | } | |
3882 | case KVM_SET_LAPIC: { | |
2204ae3c | 3883 | r = -EINVAL; |
bce87cce | 3884 | if (!lapic_in_kernel(vcpu)) |
2204ae3c | 3885 | goto out; |
ff5c2c03 | 3886 | u.lapic = memdup_user(argp, sizeof(*u.lapic)); |
9b062471 CD |
3887 | if (IS_ERR(u.lapic)) { |
3888 | r = PTR_ERR(u.lapic); | |
3889 | goto out_nofree; | |
3890 | } | |
ff5c2c03 | 3891 | |
d1ac91d8 | 3892 | r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3893 | break; |
3894 | } | |
f77bc6a4 ZX |
3895 | case KVM_INTERRUPT: { |
3896 | struct kvm_interrupt irq; | |
3897 | ||
3898 | r = -EFAULT; | |
0e96f31e | 3899 | if (copy_from_user(&irq, argp, sizeof(irq))) |
f77bc6a4 ZX |
3900 | goto out; |
3901 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
f77bc6a4 ZX |
3902 | break; |
3903 | } | |
c4abb7c9 JK |
3904 | case KVM_NMI: { |
3905 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
c4abb7c9 JK |
3906 | break; |
3907 | } | |
f077825a PB |
3908 | case KVM_SMI: { |
3909 | r = kvm_vcpu_ioctl_smi(vcpu); | |
3910 | break; | |
3911 | } | |
313a3dc7 CO |
3912 | case KVM_SET_CPUID: { |
3913 | struct kvm_cpuid __user *cpuid_arg = argp; | |
3914 | struct kvm_cpuid cpuid; | |
3915 | ||
3916 | r = -EFAULT; | |
0e96f31e | 3917 | if (copy_from_user(&cpuid, cpuid_arg, sizeof(cpuid))) |
313a3dc7 CO |
3918 | goto out; |
3919 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
313a3dc7 CO |
3920 | break; |
3921 | } | |
07716717 DK |
3922 | case KVM_SET_CPUID2: { |
3923 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3924 | struct kvm_cpuid2 cpuid; | |
3925 | ||
3926 | r = -EFAULT; | |
0e96f31e | 3927 | if (copy_from_user(&cpuid, cpuid_arg, sizeof(cpuid))) |
07716717 DK |
3928 | goto out; |
3929 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 3930 | cpuid_arg->entries); |
07716717 DK |
3931 | break; |
3932 | } | |
3933 | case KVM_GET_CPUID2: { | |
3934 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3935 | struct kvm_cpuid2 cpuid; | |
3936 | ||
3937 | r = -EFAULT; | |
0e96f31e | 3938 | if (copy_from_user(&cpuid, cpuid_arg, sizeof(cpuid))) |
07716717 DK |
3939 | goto out; |
3940 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 3941 | cpuid_arg->entries); |
07716717 DK |
3942 | if (r) |
3943 | goto out; | |
3944 | r = -EFAULT; | |
0e96f31e | 3945 | if (copy_to_user(cpuid_arg, &cpuid, sizeof(cpuid))) |
07716717 DK |
3946 | goto out; |
3947 | r = 0; | |
3948 | break; | |
3949 | } | |
801e459a TL |
3950 | case KVM_GET_MSRS: { |
3951 | int idx = srcu_read_lock(&vcpu->kvm->srcu); | |
609e36d3 | 3952 | r = msr_io(vcpu, argp, do_get_msr, 1); |
801e459a | 3953 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 3954 | break; |
801e459a TL |
3955 | } |
3956 | case KVM_SET_MSRS: { | |
3957 | int idx = srcu_read_lock(&vcpu->kvm->srcu); | |
313a3dc7 | 3958 | r = msr_io(vcpu, argp, do_set_msr, 0); |
801e459a | 3959 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 3960 | break; |
801e459a | 3961 | } |
b209749f AK |
3962 | case KVM_TPR_ACCESS_REPORTING: { |
3963 | struct kvm_tpr_access_ctl tac; | |
3964 | ||
3965 | r = -EFAULT; | |
0e96f31e | 3966 | if (copy_from_user(&tac, argp, sizeof(tac))) |
b209749f AK |
3967 | goto out; |
3968 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
3969 | if (r) | |
3970 | goto out; | |
3971 | r = -EFAULT; | |
0e96f31e | 3972 | if (copy_to_user(argp, &tac, sizeof(tac))) |
b209749f AK |
3973 | goto out; |
3974 | r = 0; | |
3975 | break; | |
3976 | }; | |
b93463aa AK |
3977 | case KVM_SET_VAPIC_ADDR: { |
3978 | struct kvm_vapic_addr va; | |
7301d6ab | 3979 | int idx; |
b93463aa AK |
3980 | |
3981 | r = -EINVAL; | |
35754c98 | 3982 | if (!lapic_in_kernel(vcpu)) |
b93463aa AK |
3983 | goto out; |
3984 | r = -EFAULT; | |
0e96f31e | 3985 | if (copy_from_user(&va, argp, sizeof(va))) |
b93463aa | 3986 | goto out; |
7301d6ab | 3987 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
fda4e2e8 | 3988 | r = kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); |
7301d6ab | 3989 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b93463aa AK |
3990 | break; |
3991 | } | |
890ca9ae HY |
3992 | case KVM_X86_SETUP_MCE: { |
3993 | u64 mcg_cap; | |
3994 | ||
3995 | r = -EFAULT; | |
0e96f31e | 3996 | if (copy_from_user(&mcg_cap, argp, sizeof(mcg_cap))) |
890ca9ae HY |
3997 | goto out; |
3998 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
3999 | break; | |
4000 | } | |
4001 | case KVM_X86_SET_MCE: { | |
4002 | struct kvm_x86_mce mce; | |
4003 | ||
4004 | r = -EFAULT; | |
0e96f31e | 4005 | if (copy_from_user(&mce, argp, sizeof(mce))) |
890ca9ae HY |
4006 | goto out; |
4007 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
4008 | break; | |
4009 | } | |
3cfc3092 JK |
4010 | case KVM_GET_VCPU_EVENTS: { |
4011 | struct kvm_vcpu_events events; | |
4012 | ||
4013 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
4014 | ||
4015 | r = -EFAULT; | |
4016 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
4017 | break; | |
4018 | r = 0; | |
4019 | break; | |
4020 | } | |
4021 | case KVM_SET_VCPU_EVENTS: { | |
4022 | struct kvm_vcpu_events events; | |
4023 | ||
4024 | r = -EFAULT; | |
4025 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
4026 | break; | |
4027 | ||
4028 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
4029 | break; | |
4030 | } | |
a1efbe77 JK |
4031 | case KVM_GET_DEBUGREGS: { |
4032 | struct kvm_debugregs dbgregs; | |
4033 | ||
4034 | kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs); | |
4035 | ||
4036 | r = -EFAULT; | |
4037 | if (copy_to_user(argp, &dbgregs, | |
4038 | sizeof(struct kvm_debugregs))) | |
4039 | break; | |
4040 | r = 0; | |
4041 | break; | |
4042 | } | |
4043 | case KVM_SET_DEBUGREGS: { | |
4044 | struct kvm_debugregs dbgregs; | |
4045 | ||
4046 | r = -EFAULT; | |
4047 | if (copy_from_user(&dbgregs, argp, | |
4048 | sizeof(struct kvm_debugregs))) | |
4049 | break; | |
4050 | ||
4051 | r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs); | |
4052 | break; | |
4053 | } | |
2d5b5a66 | 4054 | case KVM_GET_XSAVE: { |
d1ac91d8 | 4055 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 4056 | r = -ENOMEM; |
d1ac91d8 | 4057 | if (!u.xsave) |
2d5b5a66 SY |
4058 | break; |
4059 | ||
d1ac91d8 | 4060 | kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
4061 | |
4062 | r = -EFAULT; | |
d1ac91d8 | 4063 | if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
4064 | break; |
4065 | r = 0; | |
4066 | break; | |
4067 | } | |
4068 | case KVM_SET_XSAVE: { | |
ff5c2c03 | 4069 | u.xsave = memdup_user(argp, sizeof(*u.xsave)); |
9b062471 CD |
4070 | if (IS_ERR(u.xsave)) { |
4071 | r = PTR_ERR(u.xsave); | |
4072 | goto out_nofree; | |
4073 | } | |
2d5b5a66 | 4074 | |
d1ac91d8 | 4075 | r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
4076 | break; |
4077 | } | |
4078 | case KVM_GET_XCRS: { | |
d1ac91d8 | 4079 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 4080 | r = -ENOMEM; |
d1ac91d8 | 4081 | if (!u.xcrs) |
2d5b5a66 SY |
4082 | break; |
4083 | ||
d1ac91d8 | 4084 | kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
4085 | |
4086 | r = -EFAULT; | |
d1ac91d8 | 4087 | if (copy_to_user(argp, u.xcrs, |
2d5b5a66 SY |
4088 | sizeof(struct kvm_xcrs))) |
4089 | break; | |
4090 | r = 0; | |
4091 | break; | |
4092 | } | |
4093 | case KVM_SET_XCRS: { | |
ff5c2c03 | 4094 | u.xcrs = memdup_user(argp, sizeof(*u.xcrs)); |
9b062471 CD |
4095 | if (IS_ERR(u.xcrs)) { |
4096 | r = PTR_ERR(u.xcrs); | |
4097 | goto out_nofree; | |
4098 | } | |
2d5b5a66 | 4099 | |
d1ac91d8 | 4100 | r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
4101 | break; |
4102 | } | |
92a1f12d JR |
4103 | case KVM_SET_TSC_KHZ: { |
4104 | u32 user_tsc_khz; | |
4105 | ||
4106 | r = -EINVAL; | |
92a1f12d JR |
4107 | user_tsc_khz = (u32)arg; |
4108 | ||
4109 | if (user_tsc_khz >= kvm_max_guest_tsc_khz) | |
4110 | goto out; | |
4111 | ||
cc578287 ZA |
4112 | if (user_tsc_khz == 0) |
4113 | user_tsc_khz = tsc_khz; | |
4114 | ||
381d585c HZ |
4115 | if (!kvm_set_tsc_khz(vcpu, user_tsc_khz)) |
4116 | r = 0; | |
92a1f12d | 4117 | |
92a1f12d JR |
4118 | goto out; |
4119 | } | |
4120 | case KVM_GET_TSC_KHZ: { | |
cc578287 | 4121 | r = vcpu->arch.virtual_tsc_khz; |
92a1f12d JR |
4122 | goto out; |
4123 | } | |
1c0b28c2 EM |
4124 | case KVM_KVMCLOCK_CTRL: { |
4125 | r = kvm_set_guest_paused(vcpu); | |
4126 | goto out; | |
4127 | } | |
5c919412 AS |
4128 | case KVM_ENABLE_CAP: { |
4129 | struct kvm_enable_cap cap; | |
4130 | ||
4131 | r = -EFAULT; | |
4132 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
4133 | goto out; | |
4134 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
4135 | break; | |
4136 | } | |
8fcc4b59 JM |
4137 | case KVM_GET_NESTED_STATE: { |
4138 | struct kvm_nested_state __user *user_kvm_nested_state = argp; | |
4139 | u32 user_data_size; | |
4140 | ||
4141 | r = -EINVAL; | |
4142 | if (!kvm_x86_ops->get_nested_state) | |
4143 | break; | |
4144 | ||
4145 | BUILD_BUG_ON(sizeof(user_data_size) != sizeof(user_kvm_nested_state->size)); | |
26b471c7 | 4146 | r = -EFAULT; |
8fcc4b59 | 4147 | if (get_user(user_data_size, &user_kvm_nested_state->size)) |
26b471c7 | 4148 | break; |
8fcc4b59 JM |
4149 | |
4150 | r = kvm_x86_ops->get_nested_state(vcpu, user_kvm_nested_state, | |
4151 | user_data_size); | |
4152 | if (r < 0) | |
26b471c7 | 4153 | break; |
8fcc4b59 JM |
4154 | |
4155 | if (r > user_data_size) { | |
4156 | if (put_user(r, &user_kvm_nested_state->size)) | |
26b471c7 LA |
4157 | r = -EFAULT; |
4158 | else | |
4159 | r = -E2BIG; | |
4160 | break; | |
8fcc4b59 | 4161 | } |
26b471c7 | 4162 | |
8fcc4b59 JM |
4163 | r = 0; |
4164 | break; | |
4165 | } | |
4166 | case KVM_SET_NESTED_STATE: { | |
4167 | struct kvm_nested_state __user *user_kvm_nested_state = argp; | |
4168 | struct kvm_nested_state kvm_state; | |
4169 | ||
4170 | r = -EINVAL; | |
4171 | if (!kvm_x86_ops->set_nested_state) | |
4172 | break; | |
4173 | ||
26b471c7 | 4174 | r = -EFAULT; |
8fcc4b59 | 4175 | if (copy_from_user(&kvm_state, user_kvm_nested_state, sizeof(kvm_state))) |
26b471c7 | 4176 | break; |
8fcc4b59 | 4177 | |
26b471c7 | 4178 | r = -EINVAL; |
8fcc4b59 | 4179 | if (kvm_state.size < sizeof(kvm_state)) |
26b471c7 | 4180 | break; |
8fcc4b59 JM |
4181 | |
4182 | if (kvm_state.flags & | |
8cab6507 VK |
4183 | ~(KVM_STATE_NESTED_RUN_PENDING | KVM_STATE_NESTED_GUEST_MODE |
4184 | | KVM_STATE_NESTED_EVMCS)) | |
26b471c7 | 4185 | break; |
8fcc4b59 JM |
4186 | |
4187 | /* nested_run_pending implies guest_mode. */ | |
8cab6507 VK |
4188 | if ((kvm_state.flags & KVM_STATE_NESTED_RUN_PENDING) |
4189 | && !(kvm_state.flags & KVM_STATE_NESTED_GUEST_MODE)) | |
26b471c7 | 4190 | break; |
8fcc4b59 JM |
4191 | |
4192 | r = kvm_x86_ops->set_nested_state(vcpu, user_kvm_nested_state, &kvm_state); | |
4193 | break; | |
4194 | } | |
2bc39970 VK |
4195 | case KVM_GET_SUPPORTED_HV_CPUID: { |
4196 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
4197 | struct kvm_cpuid2 cpuid; | |
4198 | ||
4199 | r = -EFAULT; | |
4200 | if (copy_from_user(&cpuid, cpuid_arg, sizeof(cpuid))) | |
4201 | goto out; | |
4202 | ||
4203 | r = kvm_vcpu_ioctl_get_hv_cpuid(vcpu, &cpuid, | |
4204 | cpuid_arg->entries); | |
4205 | if (r) | |
4206 | goto out; | |
4207 | ||
4208 | r = -EFAULT; | |
4209 | if (copy_to_user(cpuid_arg, &cpuid, sizeof(cpuid))) | |
4210 | goto out; | |
4211 | r = 0; | |
4212 | break; | |
4213 | } | |
313a3dc7 CO |
4214 | default: |
4215 | r = -EINVAL; | |
4216 | } | |
4217 | out: | |
d1ac91d8 | 4218 | kfree(u.buffer); |
9b062471 CD |
4219 | out_nofree: |
4220 | vcpu_put(vcpu); | |
313a3dc7 CO |
4221 | return r; |
4222 | } | |
4223 | ||
1499fa80 | 4224 | vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
5b1c1493 CO |
4225 | { |
4226 | return VM_FAULT_SIGBUS; | |
4227 | } | |
4228 | ||
1fe779f8 CO |
4229 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
4230 | { | |
4231 | int ret; | |
4232 | ||
4233 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
951179ce | 4234 | return -EINVAL; |
1fe779f8 CO |
4235 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); |
4236 | return ret; | |
4237 | } | |
4238 | ||
b927a3ce SY |
4239 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
4240 | u64 ident_addr) | |
4241 | { | |
2ac52ab8 | 4242 | return kvm_x86_ops->set_identity_map_addr(kvm, ident_addr); |
b927a3ce SY |
4243 | } |
4244 | ||
1fe779f8 CO |
4245 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
4246 | u32 kvm_nr_mmu_pages) | |
4247 | { | |
4248 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
4249 | return -EINVAL; | |
4250 | ||
79fac95e | 4251 | mutex_lock(&kvm->slots_lock); |
1fe779f8 CO |
4252 | |
4253 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 4254 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 4255 | |
79fac95e | 4256 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
4257 | return 0; |
4258 | } | |
4259 | ||
4260 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
4261 | { | |
39de71ec | 4262 | return kvm->arch.n_max_mmu_pages; |
1fe779f8 CO |
4263 | } |
4264 | ||
1fe779f8 CO |
4265 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
4266 | { | |
90bca052 | 4267 | struct kvm_pic *pic = kvm->arch.vpic; |
1fe779f8 CO |
4268 | int r; |
4269 | ||
4270 | r = 0; | |
4271 | switch (chip->chip_id) { | |
4272 | case KVM_IRQCHIP_PIC_MASTER: | |
90bca052 | 4273 | memcpy(&chip->chip.pic, &pic->pics[0], |
1fe779f8 CO |
4274 | sizeof(struct kvm_pic_state)); |
4275 | break; | |
4276 | case KVM_IRQCHIP_PIC_SLAVE: | |
90bca052 | 4277 | memcpy(&chip->chip.pic, &pic->pics[1], |
1fe779f8 CO |
4278 | sizeof(struct kvm_pic_state)); |
4279 | break; | |
4280 | case KVM_IRQCHIP_IOAPIC: | |
33392b49 | 4281 | kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
4282 | break; |
4283 | default: | |
4284 | r = -EINVAL; | |
4285 | break; | |
4286 | } | |
4287 | return r; | |
4288 | } | |
4289 | ||
4290 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
4291 | { | |
90bca052 | 4292 | struct kvm_pic *pic = kvm->arch.vpic; |
1fe779f8 CO |
4293 | int r; |
4294 | ||
4295 | r = 0; | |
4296 | switch (chip->chip_id) { | |
4297 | case KVM_IRQCHIP_PIC_MASTER: | |
90bca052 DH |
4298 | spin_lock(&pic->lock); |
4299 | memcpy(&pic->pics[0], &chip->chip.pic, | |
1fe779f8 | 4300 | sizeof(struct kvm_pic_state)); |
90bca052 | 4301 | spin_unlock(&pic->lock); |
1fe779f8 CO |
4302 | break; |
4303 | case KVM_IRQCHIP_PIC_SLAVE: | |
90bca052 DH |
4304 | spin_lock(&pic->lock); |
4305 | memcpy(&pic->pics[1], &chip->chip.pic, | |
1fe779f8 | 4306 | sizeof(struct kvm_pic_state)); |
90bca052 | 4307 | spin_unlock(&pic->lock); |
1fe779f8 CO |
4308 | break; |
4309 | case KVM_IRQCHIP_IOAPIC: | |
33392b49 | 4310 | kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
4311 | break; |
4312 | default: | |
4313 | r = -EINVAL; | |
4314 | break; | |
4315 | } | |
90bca052 | 4316 | kvm_pic_update_irq(pic); |
1fe779f8 CO |
4317 | return r; |
4318 | } | |
4319 | ||
e0f63cb9 SY |
4320 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
4321 | { | |
34f3941c RK |
4322 | struct kvm_kpit_state *kps = &kvm->arch.vpit->pit_state; |
4323 | ||
4324 | BUILD_BUG_ON(sizeof(*ps) != sizeof(kps->channels)); | |
4325 | ||
4326 | mutex_lock(&kps->lock); | |
4327 | memcpy(ps, &kps->channels, sizeof(*ps)); | |
4328 | mutex_unlock(&kps->lock); | |
2da29bcc | 4329 | return 0; |
e0f63cb9 SY |
4330 | } |
4331 | ||
4332 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
4333 | { | |
0185604c | 4334 | int i; |
09edea72 RK |
4335 | struct kvm_pit *pit = kvm->arch.vpit; |
4336 | ||
4337 | mutex_lock(&pit->pit_state.lock); | |
34f3941c | 4338 | memcpy(&pit->pit_state.channels, ps, sizeof(*ps)); |
0185604c | 4339 | for (i = 0; i < 3; i++) |
09edea72 RK |
4340 | kvm_pit_load_count(pit, i, ps->channels[i].count, 0); |
4341 | mutex_unlock(&pit->pit_state.lock); | |
2da29bcc | 4342 | return 0; |
e9f42757 BK |
4343 | } |
4344 | ||
4345 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
4346 | { | |
e9f42757 BK |
4347 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
4348 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
4349 | sizeof(ps->channels)); | |
4350 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
4351 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
97e69aa6 | 4352 | memset(&ps->reserved, 0, sizeof(ps->reserved)); |
2da29bcc | 4353 | return 0; |
e9f42757 BK |
4354 | } |
4355 | ||
4356 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
4357 | { | |
2da29bcc | 4358 | int start = 0; |
0185604c | 4359 | int i; |
e9f42757 | 4360 | u32 prev_legacy, cur_legacy; |
09edea72 RK |
4361 | struct kvm_pit *pit = kvm->arch.vpit; |
4362 | ||
4363 | mutex_lock(&pit->pit_state.lock); | |
4364 | prev_legacy = pit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
e9f42757 BK |
4365 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; |
4366 | if (!prev_legacy && cur_legacy) | |
4367 | start = 1; | |
09edea72 RK |
4368 | memcpy(&pit->pit_state.channels, &ps->channels, |
4369 | sizeof(pit->pit_state.channels)); | |
4370 | pit->pit_state.flags = ps->flags; | |
0185604c | 4371 | for (i = 0; i < 3; i++) |
09edea72 | 4372 | kvm_pit_load_count(pit, i, pit->pit_state.channels[i].count, |
e5e57e7a | 4373 | start && i == 0); |
09edea72 | 4374 | mutex_unlock(&pit->pit_state.lock); |
2da29bcc | 4375 | return 0; |
e0f63cb9 SY |
4376 | } |
4377 | ||
52d939a0 MT |
4378 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
4379 | struct kvm_reinject_control *control) | |
4380 | { | |
71474e2f RK |
4381 | struct kvm_pit *pit = kvm->arch.vpit; |
4382 | ||
4383 | if (!pit) | |
52d939a0 | 4384 | return -ENXIO; |
b39c90b6 | 4385 | |
71474e2f RK |
4386 | /* pit->pit_state.lock was overloaded to prevent userspace from getting |
4387 | * an inconsistent state after running multiple KVM_REINJECT_CONTROL | |
4388 | * ioctls in parallel. Use a separate lock if that ioctl isn't rare. | |
4389 | */ | |
4390 | mutex_lock(&pit->pit_state.lock); | |
4391 | kvm_pit_set_reinject(pit, control->pit_reinject); | |
4392 | mutex_unlock(&pit->pit_state.lock); | |
b39c90b6 | 4393 | |
52d939a0 MT |
4394 | return 0; |
4395 | } | |
4396 | ||
95d4c16c | 4397 | /** |
60c34612 TY |
4398 | * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot |
4399 | * @kvm: kvm instance | |
4400 | * @log: slot id and address to which we copy the log | |
95d4c16c | 4401 | * |
e108ff2f PB |
4402 | * Steps 1-4 below provide general overview of dirty page logging. See |
4403 | * kvm_get_dirty_log_protect() function description for additional details. | |
4404 | * | |
4405 | * We call kvm_get_dirty_log_protect() to handle steps 1-3, upon return we | |
4406 | * always flush the TLB (step 4) even if previous step failed and the dirty | |
4407 | * bitmap may be corrupt. Regardless of previous outcome the KVM logging API | |
4408 | * does not preclude user space subsequent dirty log read. Flushing TLB ensures | |
4409 | * writes will be marked dirty for next log read. | |
95d4c16c | 4410 | * |
60c34612 TY |
4411 | * 1. Take a snapshot of the bit and clear it if needed. |
4412 | * 2. Write protect the corresponding page. | |
e108ff2f PB |
4413 | * 3. Copy the snapshot to the userspace. |
4414 | * 4. Flush TLB's if needed. | |
5bb064dc | 4415 | */ |
60c34612 | 4416 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
5bb064dc | 4417 | { |
8fe65a82 | 4418 | bool flush = false; |
e108ff2f | 4419 | int r; |
5bb064dc | 4420 | |
79fac95e | 4421 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 4422 | |
88178fd4 KH |
4423 | /* |
4424 | * Flush potentially hardware-cached dirty pages to dirty_bitmap. | |
4425 | */ | |
4426 | if (kvm_x86_ops->flush_log_dirty) | |
4427 | kvm_x86_ops->flush_log_dirty(kvm); | |
4428 | ||
8fe65a82 | 4429 | r = kvm_get_dirty_log_protect(kvm, log, &flush); |
198c74f4 XG |
4430 | |
4431 | /* | |
4432 | * All the TLBs can be flushed out of mmu lock, see the comments in | |
4433 | * kvm_mmu_slot_remove_write_access(). | |
4434 | */ | |
e108ff2f | 4435 | lockdep_assert_held(&kvm->slots_lock); |
8fe65a82 | 4436 | if (flush) |
2a31b9db PB |
4437 | kvm_flush_remote_tlbs(kvm); |
4438 | ||
4439 | mutex_unlock(&kvm->slots_lock); | |
4440 | return r; | |
4441 | } | |
4442 | ||
4443 | int kvm_vm_ioctl_clear_dirty_log(struct kvm *kvm, struct kvm_clear_dirty_log *log) | |
4444 | { | |
4445 | bool flush = false; | |
4446 | int r; | |
4447 | ||
4448 | mutex_lock(&kvm->slots_lock); | |
4449 | ||
4450 | /* | |
4451 | * Flush potentially hardware-cached dirty pages to dirty_bitmap. | |
4452 | */ | |
4453 | if (kvm_x86_ops->flush_log_dirty) | |
4454 | kvm_x86_ops->flush_log_dirty(kvm); | |
4455 | ||
4456 | r = kvm_clear_dirty_log_protect(kvm, log, &flush); | |
4457 | ||
4458 | /* | |
4459 | * All the TLBs can be flushed out of mmu lock, see the comments in | |
4460 | * kvm_mmu_slot_remove_write_access(). | |
4461 | */ | |
4462 | lockdep_assert_held(&kvm->slots_lock); | |
4463 | if (flush) | |
198c74f4 XG |
4464 | kvm_flush_remote_tlbs(kvm); |
4465 | ||
79fac95e | 4466 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
4467 | return r; |
4468 | } | |
4469 | ||
aa2fbe6d YZ |
4470 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, |
4471 | bool line_status) | |
23d43cf9 CD |
4472 | { |
4473 | if (!irqchip_in_kernel(kvm)) | |
4474 | return -ENXIO; | |
4475 | ||
4476 | irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, | |
aa2fbe6d YZ |
4477 | irq_event->irq, irq_event->level, |
4478 | line_status); | |
23d43cf9 CD |
4479 | return 0; |
4480 | } | |
4481 | ||
e5d83c74 PB |
4482 | int kvm_vm_ioctl_enable_cap(struct kvm *kvm, |
4483 | struct kvm_enable_cap *cap) | |
90de4a18 NA |
4484 | { |
4485 | int r; | |
4486 | ||
4487 | if (cap->flags) | |
4488 | return -EINVAL; | |
4489 | ||
4490 | switch (cap->cap) { | |
4491 | case KVM_CAP_DISABLE_QUIRKS: | |
4492 | kvm->arch.disabled_quirks = cap->args[0]; | |
4493 | r = 0; | |
4494 | break; | |
49df6397 SR |
4495 | case KVM_CAP_SPLIT_IRQCHIP: { |
4496 | mutex_lock(&kvm->lock); | |
b053b2ae SR |
4497 | r = -EINVAL; |
4498 | if (cap->args[0] > MAX_NR_RESERVED_IOAPIC_PINS) | |
4499 | goto split_irqchip_unlock; | |
49df6397 SR |
4500 | r = -EEXIST; |
4501 | if (irqchip_in_kernel(kvm)) | |
4502 | goto split_irqchip_unlock; | |
557abc40 | 4503 | if (kvm->created_vcpus) |
49df6397 SR |
4504 | goto split_irqchip_unlock; |
4505 | r = kvm_setup_empty_irq_routing(kvm); | |
5c0aea0e | 4506 | if (r) |
49df6397 SR |
4507 | goto split_irqchip_unlock; |
4508 | /* Pairs with irqchip_in_kernel. */ | |
4509 | smp_wmb(); | |
49776faf | 4510 | kvm->arch.irqchip_mode = KVM_IRQCHIP_SPLIT; |
b053b2ae | 4511 | kvm->arch.nr_reserved_ioapic_pins = cap->args[0]; |
49df6397 SR |
4512 | r = 0; |
4513 | split_irqchip_unlock: | |
4514 | mutex_unlock(&kvm->lock); | |
4515 | break; | |
4516 | } | |
37131313 RK |
4517 | case KVM_CAP_X2APIC_API: |
4518 | r = -EINVAL; | |
4519 | if (cap->args[0] & ~KVM_X2APIC_API_VALID_FLAGS) | |
4520 | break; | |
4521 | ||
4522 | if (cap->args[0] & KVM_X2APIC_API_USE_32BIT_IDS) | |
4523 | kvm->arch.x2apic_format = true; | |
c519265f RK |
4524 | if (cap->args[0] & KVM_X2APIC_API_DISABLE_BROADCAST_QUIRK) |
4525 | kvm->arch.x2apic_broadcast_quirk_disabled = true; | |
37131313 RK |
4526 | |
4527 | r = 0; | |
4528 | break; | |
4d5422ce WL |
4529 | case KVM_CAP_X86_DISABLE_EXITS: |
4530 | r = -EINVAL; | |
4531 | if (cap->args[0] & ~KVM_X86_DISABLE_VALID_EXITS) | |
4532 | break; | |
4533 | ||
4534 | if ((cap->args[0] & KVM_X86_DISABLE_EXITS_MWAIT) && | |
4535 | kvm_can_mwait_in_guest()) | |
4536 | kvm->arch.mwait_in_guest = true; | |
766d3571 | 4537 | if (cap->args[0] & KVM_X86_DISABLE_EXITS_HLT) |
caa057a2 | 4538 | kvm->arch.hlt_in_guest = true; |
b31c114b WL |
4539 | if (cap->args[0] & KVM_X86_DISABLE_EXITS_PAUSE) |
4540 | kvm->arch.pause_in_guest = true; | |
4d5422ce WL |
4541 | r = 0; |
4542 | break; | |
6fbbde9a DS |
4543 | case KVM_CAP_MSR_PLATFORM_INFO: |
4544 | kvm->arch.guest_can_read_msr_platform_info = cap->args[0]; | |
4545 | r = 0; | |
c4f55198 JM |
4546 | break; |
4547 | case KVM_CAP_EXCEPTION_PAYLOAD: | |
4548 | kvm->arch.exception_payload_enabled = cap->args[0]; | |
4549 | r = 0; | |
6fbbde9a | 4550 | break; |
90de4a18 NA |
4551 | default: |
4552 | r = -EINVAL; | |
4553 | break; | |
4554 | } | |
4555 | return r; | |
4556 | } | |
4557 | ||
1fe779f8 CO |
4558 | long kvm_arch_vm_ioctl(struct file *filp, |
4559 | unsigned int ioctl, unsigned long arg) | |
4560 | { | |
4561 | struct kvm *kvm = filp->private_data; | |
4562 | void __user *argp = (void __user *)arg; | |
367e1319 | 4563 | int r = -ENOTTY; |
f0d66275 DH |
4564 | /* |
4565 | * This union makes it completely explicit to gcc-3.x | |
4566 | * that these two variables' stack usage should be | |
4567 | * combined, not added together. | |
4568 | */ | |
4569 | union { | |
4570 | struct kvm_pit_state ps; | |
e9f42757 | 4571 | struct kvm_pit_state2 ps2; |
c5ff41ce | 4572 | struct kvm_pit_config pit_config; |
f0d66275 | 4573 | } u; |
1fe779f8 CO |
4574 | |
4575 | switch (ioctl) { | |
4576 | case KVM_SET_TSS_ADDR: | |
4577 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
1fe779f8 | 4578 | break; |
b927a3ce SY |
4579 | case KVM_SET_IDENTITY_MAP_ADDR: { |
4580 | u64 ident_addr; | |
4581 | ||
1af1ac91 DH |
4582 | mutex_lock(&kvm->lock); |
4583 | r = -EINVAL; | |
4584 | if (kvm->created_vcpus) | |
4585 | goto set_identity_unlock; | |
b927a3ce | 4586 | r = -EFAULT; |
0e96f31e | 4587 | if (copy_from_user(&ident_addr, argp, sizeof(ident_addr))) |
1af1ac91 | 4588 | goto set_identity_unlock; |
b927a3ce | 4589 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); |
1af1ac91 DH |
4590 | set_identity_unlock: |
4591 | mutex_unlock(&kvm->lock); | |
b927a3ce SY |
4592 | break; |
4593 | } | |
1fe779f8 CO |
4594 | case KVM_SET_NR_MMU_PAGES: |
4595 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
1fe779f8 CO |
4596 | break; |
4597 | case KVM_GET_NR_MMU_PAGES: | |
4598 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
4599 | break; | |
3ddea128 | 4600 | case KVM_CREATE_IRQCHIP: { |
3ddea128 | 4601 | mutex_lock(&kvm->lock); |
09941366 | 4602 | |
3ddea128 | 4603 | r = -EEXIST; |
35e6eaa3 | 4604 | if (irqchip_in_kernel(kvm)) |
3ddea128 | 4605 | goto create_irqchip_unlock; |
09941366 | 4606 | |
3e515705 | 4607 | r = -EINVAL; |
557abc40 | 4608 | if (kvm->created_vcpus) |
3e515705 | 4609 | goto create_irqchip_unlock; |
09941366 RK |
4610 | |
4611 | r = kvm_pic_init(kvm); | |
4612 | if (r) | |
3ddea128 | 4613 | goto create_irqchip_unlock; |
09941366 RK |
4614 | |
4615 | r = kvm_ioapic_init(kvm); | |
4616 | if (r) { | |
09941366 | 4617 | kvm_pic_destroy(kvm); |
3ddea128 | 4618 | goto create_irqchip_unlock; |
09941366 RK |
4619 | } |
4620 | ||
399ec807 AK |
4621 | r = kvm_setup_default_irq_routing(kvm); |
4622 | if (r) { | |
72bb2fcd | 4623 | kvm_ioapic_destroy(kvm); |
09941366 | 4624 | kvm_pic_destroy(kvm); |
71ba994c | 4625 | goto create_irqchip_unlock; |
399ec807 | 4626 | } |
49776faf | 4627 | /* Write kvm->irq_routing before enabling irqchip_in_kernel. */ |
71ba994c | 4628 | smp_wmb(); |
49776faf | 4629 | kvm->arch.irqchip_mode = KVM_IRQCHIP_KERNEL; |
3ddea128 MT |
4630 | create_irqchip_unlock: |
4631 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 4632 | break; |
3ddea128 | 4633 | } |
7837699f | 4634 | case KVM_CREATE_PIT: |
c5ff41ce JK |
4635 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
4636 | goto create_pit; | |
4637 | case KVM_CREATE_PIT2: | |
4638 | r = -EFAULT; | |
4639 | if (copy_from_user(&u.pit_config, argp, | |
4640 | sizeof(struct kvm_pit_config))) | |
4641 | goto out; | |
4642 | create_pit: | |
250715a6 | 4643 | mutex_lock(&kvm->lock); |
269e05e4 AK |
4644 | r = -EEXIST; |
4645 | if (kvm->arch.vpit) | |
4646 | goto create_pit_unlock; | |
7837699f | 4647 | r = -ENOMEM; |
c5ff41ce | 4648 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
4649 | if (kvm->arch.vpit) |
4650 | r = 0; | |
269e05e4 | 4651 | create_pit_unlock: |
250715a6 | 4652 | mutex_unlock(&kvm->lock); |
7837699f | 4653 | break; |
1fe779f8 CO |
4654 | case KVM_GET_IRQCHIP: { |
4655 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 4656 | struct kvm_irqchip *chip; |
1fe779f8 | 4657 | |
ff5c2c03 SL |
4658 | chip = memdup_user(argp, sizeof(*chip)); |
4659 | if (IS_ERR(chip)) { | |
4660 | r = PTR_ERR(chip); | |
1fe779f8 | 4661 | goto out; |
ff5c2c03 SL |
4662 | } |
4663 | ||
1fe779f8 | 4664 | r = -ENXIO; |
826da321 | 4665 | if (!irqchip_kernel(kvm)) |
f0d66275 DH |
4666 | goto get_irqchip_out; |
4667 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 4668 | if (r) |
f0d66275 | 4669 | goto get_irqchip_out; |
1fe779f8 | 4670 | r = -EFAULT; |
0e96f31e | 4671 | if (copy_to_user(argp, chip, sizeof(*chip))) |
f0d66275 | 4672 | goto get_irqchip_out; |
1fe779f8 | 4673 | r = 0; |
f0d66275 DH |
4674 | get_irqchip_out: |
4675 | kfree(chip); | |
1fe779f8 CO |
4676 | break; |
4677 | } | |
4678 | case KVM_SET_IRQCHIP: { | |
4679 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 4680 | struct kvm_irqchip *chip; |
1fe779f8 | 4681 | |
ff5c2c03 SL |
4682 | chip = memdup_user(argp, sizeof(*chip)); |
4683 | if (IS_ERR(chip)) { | |
4684 | r = PTR_ERR(chip); | |
1fe779f8 | 4685 | goto out; |
ff5c2c03 SL |
4686 | } |
4687 | ||
1fe779f8 | 4688 | r = -ENXIO; |
826da321 | 4689 | if (!irqchip_kernel(kvm)) |
f0d66275 DH |
4690 | goto set_irqchip_out; |
4691 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 4692 | if (r) |
f0d66275 | 4693 | goto set_irqchip_out; |
1fe779f8 | 4694 | r = 0; |
f0d66275 DH |
4695 | set_irqchip_out: |
4696 | kfree(chip); | |
1fe779f8 CO |
4697 | break; |
4698 | } | |
e0f63cb9 | 4699 | case KVM_GET_PIT: { |
e0f63cb9 | 4700 | r = -EFAULT; |
f0d66275 | 4701 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
4702 | goto out; |
4703 | r = -ENXIO; | |
4704 | if (!kvm->arch.vpit) | |
4705 | goto out; | |
f0d66275 | 4706 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
4707 | if (r) |
4708 | goto out; | |
4709 | r = -EFAULT; | |
f0d66275 | 4710 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
4711 | goto out; |
4712 | r = 0; | |
4713 | break; | |
4714 | } | |
4715 | case KVM_SET_PIT: { | |
e0f63cb9 | 4716 | r = -EFAULT; |
0e96f31e | 4717 | if (copy_from_user(&u.ps, argp, sizeof(u.ps))) |
e0f63cb9 SY |
4718 | goto out; |
4719 | r = -ENXIO; | |
4720 | if (!kvm->arch.vpit) | |
4721 | goto out; | |
f0d66275 | 4722 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
4723 | break; |
4724 | } | |
e9f42757 BK |
4725 | case KVM_GET_PIT2: { |
4726 | r = -ENXIO; | |
4727 | if (!kvm->arch.vpit) | |
4728 | goto out; | |
4729 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
4730 | if (r) | |
4731 | goto out; | |
4732 | r = -EFAULT; | |
4733 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
4734 | goto out; | |
4735 | r = 0; | |
4736 | break; | |
4737 | } | |
4738 | case KVM_SET_PIT2: { | |
4739 | r = -EFAULT; | |
4740 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
4741 | goto out; | |
4742 | r = -ENXIO; | |
4743 | if (!kvm->arch.vpit) | |
4744 | goto out; | |
4745 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
e9f42757 BK |
4746 | break; |
4747 | } | |
52d939a0 MT |
4748 | case KVM_REINJECT_CONTROL: { |
4749 | struct kvm_reinject_control control; | |
4750 | r = -EFAULT; | |
4751 | if (copy_from_user(&control, argp, sizeof(control))) | |
4752 | goto out; | |
4753 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
52d939a0 MT |
4754 | break; |
4755 | } | |
d71ba788 PB |
4756 | case KVM_SET_BOOT_CPU_ID: |
4757 | r = 0; | |
4758 | mutex_lock(&kvm->lock); | |
557abc40 | 4759 | if (kvm->created_vcpus) |
d71ba788 PB |
4760 | r = -EBUSY; |
4761 | else | |
4762 | kvm->arch.bsp_vcpu_id = arg; | |
4763 | mutex_unlock(&kvm->lock); | |
4764 | break; | |
ffde22ac | 4765 | case KVM_XEN_HVM_CONFIG: { |
51776043 | 4766 | struct kvm_xen_hvm_config xhc; |
ffde22ac | 4767 | r = -EFAULT; |
51776043 | 4768 | if (copy_from_user(&xhc, argp, sizeof(xhc))) |
ffde22ac ES |
4769 | goto out; |
4770 | r = -EINVAL; | |
51776043 | 4771 | if (xhc.flags) |
ffde22ac | 4772 | goto out; |
51776043 | 4773 | memcpy(&kvm->arch.xen_hvm_config, &xhc, sizeof(xhc)); |
ffde22ac ES |
4774 | r = 0; |
4775 | break; | |
4776 | } | |
afbcf7ab | 4777 | case KVM_SET_CLOCK: { |
afbcf7ab GC |
4778 | struct kvm_clock_data user_ns; |
4779 | u64 now_ns; | |
afbcf7ab GC |
4780 | |
4781 | r = -EFAULT; | |
4782 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
4783 | goto out; | |
4784 | ||
4785 | r = -EINVAL; | |
4786 | if (user_ns.flags) | |
4787 | goto out; | |
4788 | ||
4789 | r = 0; | |
0bc48bea RK |
4790 | /* |
4791 | * TODO: userspace has to take care of races with VCPU_RUN, so | |
4792 | * kvm_gen_update_masterclock() can be cut down to locked | |
4793 | * pvclock_update_vm_gtod_copy(). | |
4794 | */ | |
4795 | kvm_gen_update_masterclock(kvm); | |
e891a32e | 4796 | now_ns = get_kvmclock_ns(kvm); |
108b249c | 4797 | kvm->arch.kvmclock_offset += user_ns.clock - now_ns; |
0bc48bea | 4798 | kvm_make_all_cpus_request(kvm, KVM_REQ_CLOCK_UPDATE); |
afbcf7ab GC |
4799 | break; |
4800 | } | |
4801 | case KVM_GET_CLOCK: { | |
afbcf7ab GC |
4802 | struct kvm_clock_data user_ns; |
4803 | u64 now_ns; | |
4804 | ||
e891a32e | 4805 | now_ns = get_kvmclock_ns(kvm); |
108b249c | 4806 | user_ns.clock = now_ns; |
e3fd9a93 | 4807 | user_ns.flags = kvm->arch.use_master_clock ? KVM_CLOCK_TSC_STABLE : 0; |
97e69aa6 | 4808 | memset(&user_ns.pad, 0, sizeof(user_ns.pad)); |
afbcf7ab GC |
4809 | |
4810 | r = -EFAULT; | |
4811 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
4812 | goto out; | |
4813 | r = 0; | |
4814 | break; | |
4815 | } | |
5acc5c06 BS |
4816 | case KVM_MEMORY_ENCRYPT_OP: { |
4817 | r = -ENOTTY; | |
4818 | if (kvm_x86_ops->mem_enc_op) | |
4819 | r = kvm_x86_ops->mem_enc_op(kvm, argp); | |
4820 | break; | |
4821 | } | |
69eaedee BS |
4822 | case KVM_MEMORY_ENCRYPT_REG_REGION: { |
4823 | struct kvm_enc_region region; | |
4824 | ||
4825 | r = -EFAULT; | |
4826 | if (copy_from_user(®ion, argp, sizeof(region))) | |
4827 | goto out; | |
4828 | ||
4829 | r = -ENOTTY; | |
4830 | if (kvm_x86_ops->mem_enc_reg_region) | |
4831 | r = kvm_x86_ops->mem_enc_reg_region(kvm, ®ion); | |
4832 | break; | |
4833 | } | |
4834 | case KVM_MEMORY_ENCRYPT_UNREG_REGION: { | |
4835 | struct kvm_enc_region region; | |
4836 | ||
4837 | r = -EFAULT; | |
4838 | if (copy_from_user(®ion, argp, sizeof(region))) | |
4839 | goto out; | |
4840 | ||
4841 | r = -ENOTTY; | |
4842 | if (kvm_x86_ops->mem_enc_unreg_region) | |
4843 | r = kvm_x86_ops->mem_enc_unreg_region(kvm, ®ion); | |
4844 | break; | |
4845 | } | |
faeb7833 RK |
4846 | case KVM_HYPERV_EVENTFD: { |
4847 | struct kvm_hyperv_eventfd hvevfd; | |
4848 | ||
4849 | r = -EFAULT; | |
4850 | if (copy_from_user(&hvevfd, argp, sizeof(hvevfd))) | |
4851 | goto out; | |
4852 | r = kvm_vm_ioctl_hv_eventfd(kvm, &hvevfd); | |
4853 | break; | |
4854 | } | |
1fe779f8 | 4855 | default: |
ad6260da | 4856 | r = -ENOTTY; |
1fe779f8 CO |
4857 | } |
4858 | out: | |
4859 | return r; | |
4860 | } | |
4861 | ||
a16b043c | 4862 | static void kvm_init_msr_list(void) |
043405e1 CO |
4863 | { |
4864 | u32 dummy[2]; | |
4865 | unsigned i, j; | |
4866 | ||
62ef68bb | 4867 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { |
043405e1 CO |
4868 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
4869 | continue; | |
93c4adc7 PB |
4870 | |
4871 | /* | |
4872 | * Even MSRs that are valid in the host may not be exposed | |
9dbe6cf9 | 4873 | * to the guests in some cases. |
93c4adc7 PB |
4874 | */ |
4875 | switch (msrs_to_save[i]) { | |
4876 | case MSR_IA32_BNDCFGS: | |
503234b3 | 4877 | if (!kvm_mpx_supported()) |
93c4adc7 PB |
4878 | continue; |
4879 | break; | |
9dbe6cf9 PB |
4880 | case MSR_TSC_AUX: |
4881 | if (!kvm_x86_ops->rdtscp_supported()) | |
4882 | continue; | |
4883 | break; | |
93c4adc7 PB |
4884 | default: |
4885 | break; | |
4886 | } | |
4887 | ||
043405e1 CO |
4888 | if (j < i) |
4889 | msrs_to_save[j] = msrs_to_save[i]; | |
4890 | j++; | |
4891 | } | |
4892 | num_msrs_to_save = j; | |
62ef68bb PB |
4893 | |
4894 | for (i = j = 0; i < ARRAY_SIZE(emulated_msrs); i++) { | |
bc226f07 TL |
4895 | if (!kvm_x86_ops->has_emulated_msr(emulated_msrs[i])) |
4896 | continue; | |
62ef68bb PB |
4897 | |
4898 | if (j < i) | |
4899 | emulated_msrs[j] = emulated_msrs[i]; | |
4900 | j++; | |
4901 | } | |
4902 | num_emulated_msrs = j; | |
801e459a TL |
4903 | |
4904 | for (i = j = 0; i < ARRAY_SIZE(msr_based_features); i++) { | |
4905 | struct kvm_msr_entry msr; | |
4906 | ||
4907 | msr.index = msr_based_features[i]; | |
66421c1e | 4908 | if (kvm_get_msr_feature(&msr)) |
801e459a TL |
4909 | continue; |
4910 | ||
4911 | if (j < i) | |
4912 | msr_based_features[j] = msr_based_features[i]; | |
4913 | j++; | |
4914 | } | |
4915 | num_msr_based_features = j; | |
043405e1 CO |
4916 | } |
4917 | ||
bda9020e MT |
4918 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
4919 | const void *v) | |
bbd9b64e | 4920 | { |
70252a10 AK |
4921 | int handled = 0; |
4922 | int n; | |
4923 | ||
4924 | do { | |
4925 | n = min(len, 8); | |
bce87cce | 4926 | if (!(lapic_in_kernel(vcpu) && |
e32edf4f NN |
4927 | !kvm_iodevice_write(vcpu, &vcpu->arch.apic->dev, addr, n, v)) |
4928 | && kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, n, v)) | |
70252a10 AK |
4929 | break; |
4930 | handled += n; | |
4931 | addr += n; | |
4932 | len -= n; | |
4933 | v += n; | |
4934 | } while (len); | |
bbd9b64e | 4935 | |
70252a10 | 4936 | return handled; |
bbd9b64e CO |
4937 | } |
4938 | ||
bda9020e | 4939 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 4940 | { |
70252a10 AK |
4941 | int handled = 0; |
4942 | int n; | |
4943 | ||
4944 | do { | |
4945 | n = min(len, 8); | |
bce87cce | 4946 | if (!(lapic_in_kernel(vcpu) && |
e32edf4f NN |
4947 | !kvm_iodevice_read(vcpu, &vcpu->arch.apic->dev, |
4948 | addr, n, v)) | |
4949 | && kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, n, v)) | |
70252a10 | 4950 | break; |
e39d200f | 4951 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, v); |
70252a10 AK |
4952 | handled += n; |
4953 | addr += n; | |
4954 | len -= n; | |
4955 | v += n; | |
4956 | } while (len); | |
bbd9b64e | 4957 | |
70252a10 | 4958 | return handled; |
bbd9b64e CO |
4959 | } |
4960 | ||
2dafc6c2 GN |
4961 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
4962 | struct kvm_segment *var, int seg) | |
4963 | { | |
4964 | kvm_x86_ops->set_segment(vcpu, var, seg); | |
4965 | } | |
4966 | ||
4967 | void kvm_get_segment(struct kvm_vcpu *vcpu, | |
4968 | struct kvm_segment *var, int seg) | |
4969 | { | |
4970 | kvm_x86_ops->get_segment(vcpu, var, seg); | |
4971 | } | |
4972 | ||
54987b7a PB |
4973 | gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, |
4974 | struct x86_exception *exception) | |
02f59dc9 JR |
4975 | { |
4976 | gpa_t t_gpa; | |
02f59dc9 JR |
4977 | |
4978 | BUG_ON(!mmu_is_nested(vcpu)); | |
4979 | ||
4980 | /* NPT walks are always user-walks */ | |
4981 | access |= PFERR_USER_MASK; | |
44dd3ffa | 4982 | t_gpa = vcpu->arch.mmu->gva_to_gpa(vcpu, gpa, access, exception); |
02f59dc9 JR |
4983 | |
4984 | return t_gpa; | |
4985 | } | |
4986 | ||
ab9ae313 AK |
4987 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, |
4988 | struct x86_exception *exception) | |
1871c602 GN |
4989 | { |
4990 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
ab9ae313 | 4991 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4992 | } |
4993 | ||
ab9ae313 AK |
4994 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, |
4995 | struct x86_exception *exception) | |
1871c602 GN |
4996 | { |
4997 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
4998 | access |= PFERR_FETCH_MASK; | |
ab9ae313 | 4999 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
5000 | } |
5001 | ||
ab9ae313 AK |
5002 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, |
5003 | struct x86_exception *exception) | |
1871c602 GN |
5004 | { |
5005 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
5006 | access |= PFERR_WRITE_MASK; | |
ab9ae313 | 5007 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
5008 | } |
5009 | ||
5010 | /* uses this to access any guest's mapped memory without checking CPL */ | |
ab9ae313 AK |
5011 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, |
5012 | struct x86_exception *exception) | |
1871c602 | 5013 | { |
ab9ae313 | 5014 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception); |
1871c602 GN |
5015 | } |
5016 | ||
5017 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
5018 | struct kvm_vcpu *vcpu, u32 access, | |
bcc55cba | 5019 | struct x86_exception *exception) |
bbd9b64e CO |
5020 | { |
5021 | void *data = val; | |
10589a46 | 5022 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
5023 | |
5024 | while (bytes) { | |
14dfe855 | 5025 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access, |
ab9ae313 | 5026 | exception); |
bbd9b64e | 5027 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 5028 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
5029 | int ret; |
5030 | ||
bcc55cba | 5031 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 5032 | return X86EMUL_PROPAGATE_FAULT; |
54bf36aa PB |
5033 | ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, data, |
5034 | offset, toread); | |
10589a46 | 5035 | if (ret < 0) { |
c3cd7ffa | 5036 | r = X86EMUL_IO_NEEDED; |
10589a46 MT |
5037 | goto out; |
5038 | } | |
bbd9b64e | 5039 | |
77c2002e IE |
5040 | bytes -= toread; |
5041 | data += toread; | |
5042 | addr += toread; | |
bbd9b64e | 5043 | } |
10589a46 | 5044 | out: |
10589a46 | 5045 | return r; |
bbd9b64e | 5046 | } |
77c2002e | 5047 | |
1871c602 | 5048 | /* used for instruction fetching */ |
0f65dd70 AK |
5049 | static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt, |
5050 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 5051 | struct x86_exception *exception) |
1871c602 | 5052 | { |
0f65dd70 | 5053 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 5054 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
44583cba PB |
5055 | unsigned offset; |
5056 | int ret; | |
0f65dd70 | 5057 | |
44583cba PB |
5058 | /* Inline kvm_read_guest_virt_helper for speed. */ |
5059 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access|PFERR_FETCH_MASK, | |
5060 | exception); | |
5061 | if (unlikely(gpa == UNMAPPED_GVA)) | |
5062 | return X86EMUL_PROPAGATE_FAULT; | |
5063 | ||
5064 | offset = addr & (PAGE_SIZE-1); | |
5065 | if (WARN_ON(offset + bytes > PAGE_SIZE)) | |
5066 | bytes = (unsigned)PAGE_SIZE - offset; | |
54bf36aa PB |
5067 | ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, val, |
5068 | offset, bytes); | |
44583cba PB |
5069 | if (unlikely(ret < 0)) |
5070 | return X86EMUL_IO_NEEDED; | |
5071 | ||
5072 | return X86EMUL_CONTINUE; | |
1871c602 GN |
5073 | } |
5074 | ||
ce14e868 | 5075 | int kvm_read_guest_virt(struct kvm_vcpu *vcpu, |
0f65dd70 | 5076 | gva_t addr, void *val, unsigned int bytes, |
bcc55cba | 5077 | struct x86_exception *exception) |
1871c602 GN |
5078 | { |
5079 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
0f65dd70 | 5080 | |
1871c602 | 5081 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, |
bcc55cba | 5082 | exception); |
1871c602 | 5083 | } |
064aea77 | 5084 | EXPORT_SYMBOL_GPL(kvm_read_guest_virt); |
1871c602 | 5085 | |
ce14e868 PB |
5086 | static int emulator_read_std(struct x86_emulate_ctxt *ctxt, |
5087 | gva_t addr, void *val, unsigned int bytes, | |
3c9fa24c | 5088 | struct x86_exception *exception, bool system) |
1871c602 | 5089 | { |
0f65dd70 | 5090 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
3c9fa24c PB |
5091 | u32 access = 0; |
5092 | ||
5093 | if (!system && kvm_x86_ops->get_cpl(vcpu) == 3) | |
5094 | access |= PFERR_USER_MASK; | |
5095 | ||
5096 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, exception); | |
1871c602 GN |
5097 | } |
5098 | ||
7a036a6f RK |
5099 | static int kvm_read_guest_phys_system(struct x86_emulate_ctxt *ctxt, |
5100 | unsigned long addr, void *val, unsigned int bytes) | |
5101 | { | |
5102 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5103 | int r = kvm_vcpu_read_guest(vcpu, addr, val, bytes); | |
5104 | ||
5105 | return r < 0 ? X86EMUL_IO_NEEDED : X86EMUL_CONTINUE; | |
5106 | } | |
5107 | ||
ce14e868 PB |
5108 | static int kvm_write_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, |
5109 | struct kvm_vcpu *vcpu, u32 access, | |
5110 | struct x86_exception *exception) | |
77c2002e IE |
5111 | { |
5112 | void *data = val; | |
5113 | int r = X86EMUL_CONTINUE; | |
5114 | ||
5115 | while (bytes) { | |
14dfe855 | 5116 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, |
ce14e868 | 5117 | access, |
ab9ae313 | 5118 | exception); |
77c2002e IE |
5119 | unsigned offset = addr & (PAGE_SIZE-1); |
5120 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
5121 | int ret; | |
5122 | ||
bcc55cba | 5123 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 5124 | return X86EMUL_PROPAGATE_FAULT; |
54bf36aa | 5125 | ret = kvm_vcpu_write_guest(vcpu, gpa, data, towrite); |
77c2002e | 5126 | if (ret < 0) { |
c3cd7ffa | 5127 | r = X86EMUL_IO_NEEDED; |
77c2002e IE |
5128 | goto out; |
5129 | } | |
5130 | ||
5131 | bytes -= towrite; | |
5132 | data += towrite; | |
5133 | addr += towrite; | |
5134 | } | |
5135 | out: | |
5136 | return r; | |
5137 | } | |
ce14e868 PB |
5138 | |
5139 | static int emulator_write_std(struct x86_emulate_ctxt *ctxt, gva_t addr, void *val, | |
3c9fa24c PB |
5140 | unsigned int bytes, struct x86_exception *exception, |
5141 | bool system) | |
ce14e868 PB |
5142 | { |
5143 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
3c9fa24c PB |
5144 | u32 access = PFERR_WRITE_MASK; |
5145 | ||
5146 | if (!system && kvm_x86_ops->get_cpl(vcpu) == 3) | |
5147 | access |= PFERR_USER_MASK; | |
ce14e868 PB |
5148 | |
5149 | return kvm_write_guest_virt_helper(addr, val, bytes, vcpu, | |
3c9fa24c | 5150 | access, exception); |
ce14e868 PB |
5151 | } |
5152 | ||
5153 | int kvm_write_guest_virt_system(struct kvm_vcpu *vcpu, gva_t addr, void *val, | |
5154 | unsigned int bytes, struct x86_exception *exception) | |
5155 | { | |
c595ceee PB |
5156 | /* kvm_write_guest_virt_system can pull in tons of pages. */ |
5157 | vcpu->arch.l1tf_flush_l1d = true; | |
5158 | ||
ce14e868 PB |
5159 | return kvm_write_guest_virt_helper(addr, val, bytes, vcpu, |
5160 | PFERR_WRITE_MASK, exception); | |
5161 | } | |
6a4d7550 | 5162 | EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system); |
77c2002e | 5163 | |
082d06ed WL |
5164 | int handle_ud(struct kvm_vcpu *vcpu) |
5165 | { | |
6c86eedc | 5166 | int emul_type = EMULTYPE_TRAP_UD; |
082d06ed | 5167 | enum emulation_result er; |
6c86eedc WL |
5168 | char sig[5]; /* ud2; .ascii "kvm" */ |
5169 | struct x86_exception e; | |
5170 | ||
5171 | if (force_emulation_prefix && | |
3c9fa24c PB |
5172 | kvm_read_guest_virt(vcpu, kvm_get_linear_rip(vcpu), |
5173 | sig, sizeof(sig), &e) == 0 && | |
6c86eedc WL |
5174 | memcmp(sig, "\xf\xbkvm", sizeof(sig)) == 0) { |
5175 | kvm_rip_write(vcpu, kvm_rip_read(vcpu) + sizeof(sig)); | |
5176 | emul_type = 0; | |
5177 | } | |
082d06ed | 5178 | |
0ce97a2b | 5179 | er = kvm_emulate_instruction(vcpu, emul_type); |
082d06ed WL |
5180 | if (er == EMULATE_USER_EXIT) |
5181 | return 0; | |
5182 | if (er != EMULATE_DONE) | |
5183 | kvm_queue_exception(vcpu, UD_VECTOR); | |
5184 | return 1; | |
5185 | } | |
5186 | EXPORT_SYMBOL_GPL(handle_ud); | |
5187 | ||
0f89b207 TL |
5188 | static int vcpu_is_mmio_gpa(struct kvm_vcpu *vcpu, unsigned long gva, |
5189 | gpa_t gpa, bool write) | |
5190 | { | |
5191 | /* For APIC access vmexit */ | |
5192 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
5193 | return 1; | |
5194 | ||
5195 | if (vcpu_match_mmio_gpa(vcpu, gpa)) { | |
5196 | trace_vcpu_match_mmio(gva, gpa, write, true); | |
5197 | return 1; | |
5198 | } | |
5199 | ||
5200 | return 0; | |
5201 | } | |
5202 | ||
af7cc7d1 XG |
5203 | static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva, |
5204 | gpa_t *gpa, struct x86_exception *exception, | |
5205 | bool write) | |
5206 | { | |
97d64b78 AK |
5207 | u32 access = ((kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0) |
5208 | | (write ? PFERR_WRITE_MASK : 0); | |
af7cc7d1 | 5209 | |
be94f6b7 HH |
5210 | /* |
5211 | * currently PKRU is only applied to ept enabled guest so | |
5212 | * there is no pkey in EPT page table for L1 guest or EPT | |
5213 | * shadow page table for L2 guest. | |
5214 | */ | |
97d64b78 | 5215 | if (vcpu_match_mmio_gva(vcpu, gva) |
97ec8c06 | 5216 | && !permission_fault(vcpu, vcpu->arch.walk_mmu, |
be94f6b7 | 5217 | vcpu->arch.access, 0, access)) { |
bebb106a XG |
5218 | *gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT | |
5219 | (gva & (PAGE_SIZE - 1)); | |
4f022648 | 5220 | trace_vcpu_match_mmio(gva, *gpa, write, false); |
bebb106a XG |
5221 | return 1; |
5222 | } | |
5223 | ||
af7cc7d1 XG |
5224 | *gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
5225 | ||
5226 | if (*gpa == UNMAPPED_GVA) | |
5227 | return -1; | |
5228 | ||
0f89b207 | 5229 | return vcpu_is_mmio_gpa(vcpu, gva, *gpa, write); |
af7cc7d1 XG |
5230 | } |
5231 | ||
3200f405 | 5232 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
bcc55cba | 5233 | const void *val, int bytes) |
bbd9b64e CO |
5234 | { |
5235 | int ret; | |
5236 | ||
54bf36aa | 5237 | ret = kvm_vcpu_write_guest(vcpu, gpa, val, bytes); |
9f811285 | 5238 | if (ret < 0) |
bbd9b64e | 5239 | return 0; |
0eb05bf2 | 5240 | kvm_page_track_write(vcpu, gpa, val, bytes); |
bbd9b64e CO |
5241 | return 1; |
5242 | } | |
5243 | ||
77d197b2 XG |
5244 | struct read_write_emulator_ops { |
5245 | int (*read_write_prepare)(struct kvm_vcpu *vcpu, void *val, | |
5246 | int bytes); | |
5247 | int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
5248 | void *val, int bytes); | |
5249 | int (*read_write_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
5250 | int bytes, void *val); | |
5251 | int (*read_write_exit_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
5252 | void *val, int bytes); | |
5253 | bool write; | |
5254 | }; | |
5255 | ||
5256 | static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes) | |
5257 | { | |
5258 | if (vcpu->mmio_read_completed) { | |
77d197b2 | 5259 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
e39d200f | 5260 | vcpu->mmio_fragments[0].gpa, val); |
77d197b2 XG |
5261 | vcpu->mmio_read_completed = 0; |
5262 | return 1; | |
5263 | } | |
5264 | ||
5265 | return 0; | |
5266 | } | |
5267 | ||
5268 | static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
5269 | void *val, int bytes) | |
5270 | { | |
54bf36aa | 5271 | return !kvm_vcpu_read_guest(vcpu, gpa, val, bytes); |
77d197b2 XG |
5272 | } |
5273 | ||
5274 | static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
5275 | void *val, int bytes) | |
5276 | { | |
5277 | return emulator_write_phys(vcpu, gpa, val, bytes); | |
5278 | } | |
5279 | ||
5280 | static int write_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val) | |
5281 | { | |
e39d200f | 5282 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, val); |
77d197b2 XG |
5283 | return vcpu_mmio_write(vcpu, gpa, bytes, val); |
5284 | } | |
5285 | ||
5286 | static int read_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
5287 | void *val, int bytes) | |
5288 | { | |
e39d200f | 5289 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, NULL); |
77d197b2 XG |
5290 | return X86EMUL_IO_NEEDED; |
5291 | } | |
5292 | ||
5293 | static int write_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
5294 | void *val, int bytes) | |
5295 | { | |
f78146b0 AK |
5296 | struct kvm_mmio_fragment *frag = &vcpu->mmio_fragments[0]; |
5297 | ||
87da7e66 | 5298 | memcpy(vcpu->run->mmio.data, frag->data, min(8u, frag->len)); |
77d197b2 XG |
5299 | return X86EMUL_CONTINUE; |
5300 | } | |
5301 | ||
0fbe9b0b | 5302 | static const struct read_write_emulator_ops read_emultor = { |
77d197b2 XG |
5303 | .read_write_prepare = read_prepare, |
5304 | .read_write_emulate = read_emulate, | |
5305 | .read_write_mmio = vcpu_mmio_read, | |
5306 | .read_write_exit_mmio = read_exit_mmio, | |
5307 | }; | |
5308 | ||
0fbe9b0b | 5309 | static const struct read_write_emulator_ops write_emultor = { |
77d197b2 XG |
5310 | .read_write_emulate = write_emulate, |
5311 | .read_write_mmio = write_mmio, | |
5312 | .read_write_exit_mmio = write_exit_mmio, | |
5313 | .write = true, | |
5314 | }; | |
5315 | ||
22388a3c XG |
5316 | static int emulator_read_write_onepage(unsigned long addr, void *val, |
5317 | unsigned int bytes, | |
5318 | struct x86_exception *exception, | |
5319 | struct kvm_vcpu *vcpu, | |
0fbe9b0b | 5320 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 5321 | { |
af7cc7d1 XG |
5322 | gpa_t gpa; |
5323 | int handled, ret; | |
22388a3c | 5324 | bool write = ops->write; |
f78146b0 | 5325 | struct kvm_mmio_fragment *frag; |
0f89b207 TL |
5326 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
5327 | ||
5328 | /* | |
5329 | * If the exit was due to a NPF we may already have a GPA. | |
5330 | * If the GPA is present, use it to avoid the GVA to GPA table walk. | |
5331 | * Note, this cannot be used on string operations since string | |
5332 | * operation using rep will only have the initial GPA from the NPF | |
5333 | * occurred. | |
5334 | */ | |
5335 | if (vcpu->arch.gpa_available && | |
5336 | emulator_can_use_gpa(ctxt) && | |
618232e2 BS |
5337 | (addr & ~PAGE_MASK) == (vcpu->arch.gpa_val & ~PAGE_MASK)) { |
5338 | gpa = vcpu->arch.gpa_val; | |
5339 | ret = vcpu_is_mmio_gpa(vcpu, addr, gpa, write); | |
5340 | } else { | |
5341 | ret = vcpu_mmio_gva_to_gpa(vcpu, addr, &gpa, exception, write); | |
5342 | if (ret < 0) | |
5343 | return X86EMUL_PROPAGATE_FAULT; | |
0f89b207 | 5344 | } |
10589a46 | 5345 | |
618232e2 | 5346 | if (!ret && ops->read_write_emulate(vcpu, gpa, val, bytes)) |
bbd9b64e CO |
5347 | return X86EMUL_CONTINUE; |
5348 | ||
bbd9b64e CO |
5349 | /* |
5350 | * Is this MMIO handled locally? | |
5351 | */ | |
22388a3c | 5352 | handled = ops->read_write_mmio(vcpu, gpa, bytes, val); |
70252a10 | 5353 | if (handled == bytes) |
bbd9b64e | 5354 | return X86EMUL_CONTINUE; |
bbd9b64e | 5355 | |
70252a10 AK |
5356 | gpa += handled; |
5357 | bytes -= handled; | |
5358 | val += handled; | |
5359 | ||
87da7e66 XG |
5360 | WARN_ON(vcpu->mmio_nr_fragments >= KVM_MAX_MMIO_FRAGMENTS); |
5361 | frag = &vcpu->mmio_fragments[vcpu->mmio_nr_fragments++]; | |
5362 | frag->gpa = gpa; | |
5363 | frag->data = val; | |
5364 | frag->len = bytes; | |
f78146b0 | 5365 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
5366 | } |
5367 | ||
52eb5a6d XL |
5368 | static int emulator_read_write(struct x86_emulate_ctxt *ctxt, |
5369 | unsigned long addr, | |
22388a3c XG |
5370 | void *val, unsigned int bytes, |
5371 | struct x86_exception *exception, | |
0fbe9b0b | 5372 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 5373 | { |
0f65dd70 | 5374 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
f78146b0 AK |
5375 | gpa_t gpa; |
5376 | int rc; | |
5377 | ||
5378 | if (ops->read_write_prepare && | |
5379 | ops->read_write_prepare(vcpu, val, bytes)) | |
5380 | return X86EMUL_CONTINUE; | |
5381 | ||
5382 | vcpu->mmio_nr_fragments = 0; | |
0f65dd70 | 5383 | |
bbd9b64e CO |
5384 | /* Crossing a page boundary? */ |
5385 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
f78146b0 | 5386 | int now; |
bbd9b64e CO |
5387 | |
5388 | now = -addr & ~PAGE_MASK; | |
22388a3c XG |
5389 | rc = emulator_read_write_onepage(addr, val, now, exception, |
5390 | vcpu, ops); | |
5391 | ||
bbd9b64e CO |
5392 | if (rc != X86EMUL_CONTINUE) |
5393 | return rc; | |
5394 | addr += now; | |
bac15531 NA |
5395 | if (ctxt->mode != X86EMUL_MODE_PROT64) |
5396 | addr = (u32)addr; | |
bbd9b64e CO |
5397 | val += now; |
5398 | bytes -= now; | |
5399 | } | |
22388a3c | 5400 | |
f78146b0 AK |
5401 | rc = emulator_read_write_onepage(addr, val, bytes, exception, |
5402 | vcpu, ops); | |
5403 | if (rc != X86EMUL_CONTINUE) | |
5404 | return rc; | |
5405 | ||
5406 | if (!vcpu->mmio_nr_fragments) | |
5407 | return rc; | |
5408 | ||
5409 | gpa = vcpu->mmio_fragments[0].gpa; | |
5410 | ||
5411 | vcpu->mmio_needed = 1; | |
5412 | vcpu->mmio_cur_fragment = 0; | |
5413 | ||
87da7e66 | 5414 | vcpu->run->mmio.len = min(8u, vcpu->mmio_fragments[0].len); |
f78146b0 AK |
5415 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = ops->write; |
5416 | vcpu->run->exit_reason = KVM_EXIT_MMIO; | |
5417 | vcpu->run->mmio.phys_addr = gpa; | |
5418 | ||
5419 | return ops->read_write_exit_mmio(vcpu, gpa, val, bytes); | |
22388a3c XG |
5420 | } |
5421 | ||
5422 | static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt, | |
5423 | unsigned long addr, | |
5424 | void *val, | |
5425 | unsigned int bytes, | |
5426 | struct x86_exception *exception) | |
5427 | { | |
5428 | return emulator_read_write(ctxt, addr, val, bytes, | |
5429 | exception, &read_emultor); | |
5430 | } | |
5431 | ||
52eb5a6d | 5432 | static int emulator_write_emulated(struct x86_emulate_ctxt *ctxt, |
22388a3c XG |
5433 | unsigned long addr, |
5434 | const void *val, | |
5435 | unsigned int bytes, | |
5436 | struct x86_exception *exception) | |
5437 | { | |
5438 | return emulator_read_write(ctxt, addr, (void *)val, bytes, | |
5439 | exception, &write_emultor); | |
bbd9b64e | 5440 | } |
bbd9b64e | 5441 | |
daea3e73 AK |
5442 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
5443 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) | |
5444 | ||
5445 | #ifdef CONFIG_X86_64 | |
5446 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) | |
5447 | #else | |
5448 | # define CMPXCHG64(ptr, old, new) \ | |
9749a6c0 | 5449 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
daea3e73 AK |
5450 | #endif |
5451 | ||
0f65dd70 AK |
5452 | static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, |
5453 | unsigned long addr, | |
bbd9b64e CO |
5454 | const void *old, |
5455 | const void *new, | |
5456 | unsigned int bytes, | |
0f65dd70 | 5457 | struct x86_exception *exception) |
bbd9b64e | 5458 | { |
0f65dd70 | 5459 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
daea3e73 AK |
5460 | gpa_t gpa; |
5461 | struct page *page; | |
5462 | char *kaddr; | |
5463 | bool exchanged; | |
2bacc55c | 5464 | |
daea3e73 AK |
5465 | /* guests cmpxchg8b have to be emulated atomically */ |
5466 | if (bytes > 8 || (bytes & (bytes - 1))) | |
5467 | goto emul_write; | |
10589a46 | 5468 | |
daea3e73 | 5469 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
2bacc55c | 5470 | |
daea3e73 AK |
5471 | if (gpa == UNMAPPED_GVA || |
5472 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
5473 | goto emul_write; | |
2bacc55c | 5474 | |
daea3e73 AK |
5475 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
5476 | goto emul_write; | |
72dc67a6 | 5477 | |
54bf36aa | 5478 | page = kvm_vcpu_gfn_to_page(vcpu, gpa >> PAGE_SHIFT); |
32cad84f | 5479 | if (is_error_page(page)) |
c19b8bd6 | 5480 | goto emul_write; |
72dc67a6 | 5481 | |
8fd75e12 | 5482 | kaddr = kmap_atomic(page); |
daea3e73 AK |
5483 | kaddr += offset_in_page(gpa); |
5484 | switch (bytes) { | |
5485 | case 1: | |
5486 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); | |
5487 | break; | |
5488 | case 2: | |
5489 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); | |
5490 | break; | |
5491 | case 4: | |
5492 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); | |
5493 | break; | |
5494 | case 8: | |
5495 | exchanged = CMPXCHG64(kaddr, old, new); | |
5496 | break; | |
5497 | default: | |
5498 | BUG(); | |
2bacc55c | 5499 | } |
8fd75e12 | 5500 | kunmap_atomic(kaddr); |
daea3e73 AK |
5501 | kvm_release_page_dirty(page); |
5502 | ||
5503 | if (!exchanged) | |
5504 | return X86EMUL_CMPXCHG_FAILED; | |
5505 | ||
54bf36aa | 5506 | kvm_vcpu_mark_page_dirty(vcpu, gpa >> PAGE_SHIFT); |
0eb05bf2 | 5507 | kvm_page_track_write(vcpu, gpa, new, bytes); |
8f6abd06 GN |
5508 | |
5509 | return X86EMUL_CONTINUE; | |
4a5f48f6 | 5510 | |
3200f405 | 5511 | emul_write: |
daea3e73 | 5512 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c | 5513 | |
0f65dd70 | 5514 | return emulator_write_emulated(ctxt, addr, new, bytes, exception); |
bbd9b64e CO |
5515 | } |
5516 | ||
cf8f70bf GN |
5517 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
5518 | { | |
cbfc6c91 | 5519 | int r = 0, i; |
cf8f70bf | 5520 | |
cbfc6c91 WL |
5521 | for (i = 0; i < vcpu->arch.pio.count; i++) { |
5522 | if (vcpu->arch.pio.in) | |
5523 | r = kvm_io_bus_read(vcpu, KVM_PIO_BUS, vcpu->arch.pio.port, | |
5524 | vcpu->arch.pio.size, pd); | |
5525 | else | |
5526 | r = kvm_io_bus_write(vcpu, KVM_PIO_BUS, | |
5527 | vcpu->arch.pio.port, vcpu->arch.pio.size, | |
5528 | pd); | |
5529 | if (r) | |
5530 | break; | |
5531 | pd += vcpu->arch.pio.size; | |
5532 | } | |
cf8f70bf GN |
5533 | return r; |
5534 | } | |
5535 | ||
6f6fbe98 XG |
5536 | static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size, |
5537 | unsigned short port, void *val, | |
5538 | unsigned int count, bool in) | |
cf8f70bf | 5539 | { |
cf8f70bf | 5540 | vcpu->arch.pio.port = port; |
6f6fbe98 | 5541 | vcpu->arch.pio.in = in; |
7972995b | 5542 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
5543 | vcpu->arch.pio.size = size; |
5544 | ||
5545 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
7972995b | 5546 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
5547 | return 1; |
5548 | } | |
5549 | ||
5550 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
6f6fbe98 | 5551 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; |
cf8f70bf GN |
5552 | vcpu->run->io.size = size; |
5553 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
5554 | vcpu->run->io.count = count; | |
5555 | vcpu->run->io.port = port; | |
5556 | ||
5557 | return 0; | |
5558 | } | |
5559 | ||
6f6fbe98 XG |
5560 | static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt, |
5561 | int size, unsigned short port, void *val, | |
5562 | unsigned int count) | |
cf8f70bf | 5563 | { |
ca1d4a9e | 5564 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
6f6fbe98 | 5565 | int ret; |
ca1d4a9e | 5566 | |
6f6fbe98 XG |
5567 | if (vcpu->arch.pio.count) |
5568 | goto data_avail; | |
cf8f70bf | 5569 | |
cbfc6c91 WL |
5570 | memset(vcpu->arch.pio_data, 0, size * count); |
5571 | ||
6f6fbe98 XG |
5572 | ret = emulator_pio_in_out(vcpu, size, port, val, count, true); |
5573 | if (ret) { | |
5574 | data_avail: | |
5575 | memcpy(val, vcpu->arch.pio_data, size * count); | |
1171903d | 5576 | trace_kvm_pio(KVM_PIO_IN, port, size, count, vcpu->arch.pio_data); |
7972995b | 5577 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
5578 | return 1; |
5579 | } | |
5580 | ||
cf8f70bf GN |
5581 | return 0; |
5582 | } | |
5583 | ||
6f6fbe98 XG |
5584 | static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt, |
5585 | int size, unsigned short port, | |
5586 | const void *val, unsigned int count) | |
5587 | { | |
5588 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5589 | ||
5590 | memcpy(vcpu->arch.pio_data, val, size * count); | |
1171903d | 5591 | trace_kvm_pio(KVM_PIO_OUT, port, size, count, vcpu->arch.pio_data); |
6f6fbe98 XG |
5592 | return emulator_pio_in_out(vcpu, size, port, (void *)val, count, false); |
5593 | } | |
5594 | ||
bbd9b64e CO |
5595 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
5596 | { | |
5597 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
5598 | } | |
5599 | ||
3cb16fe7 | 5600 | static void emulator_invlpg(struct x86_emulate_ctxt *ctxt, ulong address) |
bbd9b64e | 5601 | { |
3cb16fe7 | 5602 | kvm_mmu_invlpg(emul_to_vcpu(ctxt), address); |
bbd9b64e CO |
5603 | } |
5604 | ||
ae6a2375 | 5605 | static int kvm_emulate_wbinvd_noskip(struct kvm_vcpu *vcpu) |
f5f48ee1 SY |
5606 | { |
5607 | if (!need_emulate_wbinvd(vcpu)) | |
5608 | return X86EMUL_CONTINUE; | |
5609 | ||
5610 | if (kvm_x86_ops->has_wbinvd_exit()) { | |
2eec7343 JK |
5611 | int cpu = get_cpu(); |
5612 | ||
5613 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
f5f48ee1 SY |
5614 | smp_call_function_many(vcpu->arch.wbinvd_dirty_mask, |
5615 | wbinvd_ipi, NULL, 1); | |
2eec7343 | 5616 | put_cpu(); |
f5f48ee1 | 5617 | cpumask_clear(vcpu->arch.wbinvd_dirty_mask); |
2eec7343 JK |
5618 | } else |
5619 | wbinvd(); | |
f5f48ee1 SY |
5620 | return X86EMUL_CONTINUE; |
5621 | } | |
5cb56059 JS |
5622 | |
5623 | int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
5624 | { | |
6affcbed KH |
5625 | kvm_emulate_wbinvd_noskip(vcpu); |
5626 | return kvm_skip_emulated_instruction(vcpu); | |
5cb56059 | 5627 | } |
f5f48ee1 SY |
5628 | EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd); |
5629 | ||
5cb56059 JS |
5630 | |
5631 | ||
bcaf5cc5 AK |
5632 | static void emulator_wbinvd(struct x86_emulate_ctxt *ctxt) |
5633 | { | |
5cb56059 | 5634 | kvm_emulate_wbinvd_noskip(emul_to_vcpu(ctxt)); |
bcaf5cc5 AK |
5635 | } |
5636 | ||
52eb5a6d XL |
5637 | static int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, |
5638 | unsigned long *dest) | |
bbd9b64e | 5639 | { |
16f8a6f9 | 5640 | return kvm_get_dr(emul_to_vcpu(ctxt), dr, dest); |
bbd9b64e CO |
5641 | } |
5642 | ||
52eb5a6d XL |
5643 | static int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, |
5644 | unsigned long value) | |
bbd9b64e | 5645 | { |
338dbc97 | 5646 | |
717746e3 | 5647 | return __kvm_set_dr(emul_to_vcpu(ctxt), dr, value); |
bbd9b64e CO |
5648 | } |
5649 | ||
52a46617 | 5650 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
5fdbf976 | 5651 | { |
52a46617 | 5652 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
5fdbf976 MT |
5653 | } |
5654 | ||
717746e3 | 5655 | static unsigned long emulator_get_cr(struct x86_emulate_ctxt *ctxt, int cr) |
bbd9b64e | 5656 | { |
717746e3 | 5657 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
52a46617 GN |
5658 | unsigned long value; |
5659 | ||
5660 | switch (cr) { | |
5661 | case 0: | |
5662 | value = kvm_read_cr0(vcpu); | |
5663 | break; | |
5664 | case 2: | |
5665 | value = vcpu->arch.cr2; | |
5666 | break; | |
5667 | case 3: | |
9f8fe504 | 5668 | value = kvm_read_cr3(vcpu); |
52a46617 GN |
5669 | break; |
5670 | case 4: | |
5671 | value = kvm_read_cr4(vcpu); | |
5672 | break; | |
5673 | case 8: | |
5674 | value = kvm_get_cr8(vcpu); | |
5675 | break; | |
5676 | default: | |
a737f256 | 5677 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
52a46617 GN |
5678 | return 0; |
5679 | } | |
5680 | ||
5681 | return value; | |
5682 | } | |
5683 | ||
717746e3 | 5684 | static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val) |
52a46617 | 5685 | { |
717746e3 | 5686 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
0f12244f GN |
5687 | int res = 0; |
5688 | ||
52a46617 GN |
5689 | switch (cr) { |
5690 | case 0: | |
49a9b07e | 5691 | res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
52a46617 GN |
5692 | break; |
5693 | case 2: | |
5694 | vcpu->arch.cr2 = val; | |
5695 | break; | |
5696 | case 3: | |
2390218b | 5697 | res = kvm_set_cr3(vcpu, val); |
52a46617 GN |
5698 | break; |
5699 | case 4: | |
a83b29c6 | 5700 | res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
52a46617 GN |
5701 | break; |
5702 | case 8: | |
eea1cff9 | 5703 | res = kvm_set_cr8(vcpu, val); |
52a46617 GN |
5704 | break; |
5705 | default: | |
a737f256 | 5706 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
0f12244f | 5707 | res = -1; |
52a46617 | 5708 | } |
0f12244f GN |
5709 | |
5710 | return res; | |
52a46617 GN |
5711 | } |
5712 | ||
717746e3 | 5713 | static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt) |
9c537244 | 5714 | { |
717746e3 | 5715 | return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt)); |
9c537244 GN |
5716 | } |
5717 | ||
4bff1e86 | 5718 | static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
2dafc6c2 | 5719 | { |
4bff1e86 | 5720 | kvm_x86_ops->get_gdt(emul_to_vcpu(ctxt), dt); |
2dafc6c2 GN |
5721 | } |
5722 | ||
4bff1e86 | 5723 | static void emulator_get_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
160ce1f1 | 5724 | { |
4bff1e86 | 5725 | kvm_x86_ops->get_idt(emul_to_vcpu(ctxt), dt); |
160ce1f1 MG |
5726 | } |
5727 | ||
1ac9d0cf AK |
5728 | static void emulator_set_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
5729 | { | |
5730 | kvm_x86_ops->set_gdt(emul_to_vcpu(ctxt), dt); | |
5731 | } | |
5732 | ||
5733 | static void emulator_set_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) | |
5734 | { | |
5735 | kvm_x86_ops->set_idt(emul_to_vcpu(ctxt), dt); | |
5736 | } | |
5737 | ||
4bff1e86 AK |
5738 | static unsigned long emulator_get_cached_segment_base( |
5739 | struct x86_emulate_ctxt *ctxt, int seg) | |
5951c442 | 5740 | { |
4bff1e86 | 5741 | return get_segment_base(emul_to_vcpu(ctxt), seg); |
5951c442 GN |
5742 | } |
5743 | ||
1aa36616 AK |
5744 | static bool emulator_get_segment(struct x86_emulate_ctxt *ctxt, u16 *selector, |
5745 | struct desc_struct *desc, u32 *base3, | |
5746 | int seg) | |
2dafc6c2 GN |
5747 | { |
5748 | struct kvm_segment var; | |
5749 | ||
4bff1e86 | 5750 | kvm_get_segment(emul_to_vcpu(ctxt), &var, seg); |
1aa36616 | 5751 | *selector = var.selector; |
2dafc6c2 | 5752 | |
378a8b09 GN |
5753 | if (var.unusable) { |
5754 | memset(desc, 0, sizeof(*desc)); | |
f0367ee1 RK |
5755 | if (base3) |
5756 | *base3 = 0; | |
2dafc6c2 | 5757 | return false; |
378a8b09 | 5758 | } |
2dafc6c2 GN |
5759 | |
5760 | if (var.g) | |
5761 | var.limit >>= 12; | |
5762 | set_desc_limit(desc, var.limit); | |
5763 | set_desc_base(desc, (unsigned long)var.base); | |
5601d05b GN |
5764 | #ifdef CONFIG_X86_64 |
5765 | if (base3) | |
5766 | *base3 = var.base >> 32; | |
5767 | #endif | |
2dafc6c2 GN |
5768 | desc->type = var.type; |
5769 | desc->s = var.s; | |
5770 | desc->dpl = var.dpl; | |
5771 | desc->p = var.present; | |
5772 | desc->avl = var.avl; | |
5773 | desc->l = var.l; | |
5774 | desc->d = var.db; | |
5775 | desc->g = var.g; | |
5776 | ||
5777 | return true; | |
5778 | } | |
5779 | ||
1aa36616 AK |
5780 | static void emulator_set_segment(struct x86_emulate_ctxt *ctxt, u16 selector, |
5781 | struct desc_struct *desc, u32 base3, | |
5782 | int seg) | |
2dafc6c2 | 5783 | { |
4bff1e86 | 5784 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
2dafc6c2 GN |
5785 | struct kvm_segment var; |
5786 | ||
1aa36616 | 5787 | var.selector = selector; |
2dafc6c2 | 5788 | var.base = get_desc_base(desc); |
5601d05b GN |
5789 | #ifdef CONFIG_X86_64 |
5790 | var.base |= ((u64)base3) << 32; | |
5791 | #endif | |
2dafc6c2 GN |
5792 | var.limit = get_desc_limit(desc); |
5793 | if (desc->g) | |
5794 | var.limit = (var.limit << 12) | 0xfff; | |
5795 | var.type = desc->type; | |
2dafc6c2 GN |
5796 | var.dpl = desc->dpl; |
5797 | var.db = desc->d; | |
5798 | var.s = desc->s; | |
5799 | var.l = desc->l; | |
5800 | var.g = desc->g; | |
5801 | var.avl = desc->avl; | |
5802 | var.present = desc->p; | |
5803 | var.unusable = !var.present; | |
5804 | var.padding = 0; | |
5805 | ||
5806 | kvm_set_segment(vcpu, &var, seg); | |
5807 | return; | |
5808 | } | |
5809 | ||
717746e3 AK |
5810 | static int emulator_get_msr(struct x86_emulate_ctxt *ctxt, |
5811 | u32 msr_index, u64 *pdata) | |
5812 | { | |
609e36d3 PB |
5813 | struct msr_data msr; |
5814 | int r; | |
5815 | ||
5816 | msr.index = msr_index; | |
5817 | msr.host_initiated = false; | |
5818 | r = kvm_get_msr(emul_to_vcpu(ctxt), &msr); | |
5819 | if (r) | |
5820 | return r; | |
5821 | ||
5822 | *pdata = msr.data; | |
5823 | return 0; | |
717746e3 AK |
5824 | } |
5825 | ||
5826 | static int emulator_set_msr(struct x86_emulate_ctxt *ctxt, | |
5827 | u32 msr_index, u64 data) | |
5828 | { | |
8fe8ab46 WA |
5829 | struct msr_data msr; |
5830 | ||
5831 | msr.data = data; | |
5832 | msr.index = msr_index; | |
5833 | msr.host_initiated = false; | |
5834 | return kvm_set_msr(emul_to_vcpu(ctxt), &msr); | |
717746e3 AK |
5835 | } |
5836 | ||
64d60670 PB |
5837 | static u64 emulator_get_smbase(struct x86_emulate_ctxt *ctxt) |
5838 | { | |
5839 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5840 | ||
5841 | return vcpu->arch.smbase; | |
5842 | } | |
5843 | ||
5844 | static void emulator_set_smbase(struct x86_emulate_ctxt *ctxt, u64 smbase) | |
5845 | { | |
5846 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5847 | ||
5848 | vcpu->arch.smbase = smbase; | |
5849 | } | |
5850 | ||
67f4d428 NA |
5851 | static int emulator_check_pmc(struct x86_emulate_ctxt *ctxt, |
5852 | u32 pmc) | |
5853 | { | |
c6702c9d | 5854 | return kvm_pmu_is_valid_msr_idx(emul_to_vcpu(ctxt), pmc); |
67f4d428 NA |
5855 | } |
5856 | ||
222d21aa AK |
5857 | static int emulator_read_pmc(struct x86_emulate_ctxt *ctxt, |
5858 | u32 pmc, u64 *pdata) | |
5859 | { | |
c6702c9d | 5860 | return kvm_pmu_rdpmc(emul_to_vcpu(ctxt), pmc, pdata); |
222d21aa AK |
5861 | } |
5862 | ||
6c3287f7 AK |
5863 | static void emulator_halt(struct x86_emulate_ctxt *ctxt) |
5864 | { | |
5865 | emul_to_vcpu(ctxt)->arch.halt_request = 1; | |
5866 | } | |
5867 | ||
2953538e | 5868 | static int emulator_intercept(struct x86_emulate_ctxt *ctxt, |
8a76d7f2 | 5869 | struct x86_instruction_info *info, |
c4f035c6 AK |
5870 | enum x86_intercept_stage stage) |
5871 | { | |
2953538e | 5872 | return kvm_x86_ops->check_intercept(emul_to_vcpu(ctxt), info, stage); |
c4f035c6 AK |
5873 | } |
5874 | ||
e911eb3b YZ |
5875 | static bool emulator_get_cpuid(struct x86_emulate_ctxt *ctxt, |
5876 | u32 *eax, u32 *ebx, u32 *ecx, u32 *edx, bool check_limit) | |
bdb42f5a | 5877 | { |
e911eb3b | 5878 | return kvm_cpuid(emul_to_vcpu(ctxt), eax, ebx, ecx, edx, check_limit); |
bdb42f5a SB |
5879 | } |
5880 | ||
dd856efa AK |
5881 | static ulong emulator_read_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg) |
5882 | { | |
5883 | return kvm_register_read(emul_to_vcpu(ctxt), reg); | |
5884 | } | |
5885 | ||
5886 | static void emulator_write_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg, ulong val) | |
5887 | { | |
5888 | kvm_register_write(emul_to_vcpu(ctxt), reg, val); | |
5889 | } | |
5890 | ||
801806d9 NA |
5891 | static void emulator_set_nmi_mask(struct x86_emulate_ctxt *ctxt, bool masked) |
5892 | { | |
5893 | kvm_x86_ops->set_nmi_mask(emul_to_vcpu(ctxt), masked); | |
5894 | } | |
5895 | ||
6ed071f0 LP |
5896 | static unsigned emulator_get_hflags(struct x86_emulate_ctxt *ctxt) |
5897 | { | |
5898 | return emul_to_vcpu(ctxt)->arch.hflags; | |
5899 | } | |
5900 | ||
5901 | static void emulator_set_hflags(struct x86_emulate_ctxt *ctxt, unsigned emul_flags) | |
5902 | { | |
5903 | kvm_set_hflags(emul_to_vcpu(ctxt), emul_flags); | |
5904 | } | |
5905 | ||
0234bf88 LP |
5906 | static int emulator_pre_leave_smm(struct x86_emulate_ctxt *ctxt, u64 smbase) |
5907 | { | |
5908 | return kvm_x86_ops->pre_leave_smm(emul_to_vcpu(ctxt), smbase); | |
5909 | } | |
5910 | ||
0225fb50 | 5911 | static const struct x86_emulate_ops emulate_ops = { |
dd856efa AK |
5912 | .read_gpr = emulator_read_gpr, |
5913 | .write_gpr = emulator_write_gpr, | |
ce14e868 PB |
5914 | .read_std = emulator_read_std, |
5915 | .write_std = emulator_write_std, | |
7a036a6f | 5916 | .read_phys = kvm_read_guest_phys_system, |
1871c602 | 5917 | .fetch = kvm_fetch_guest_virt, |
bbd9b64e CO |
5918 | .read_emulated = emulator_read_emulated, |
5919 | .write_emulated = emulator_write_emulated, | |
5920 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
3cb16fe7 | 5921 | .invlpg = emulator_invlpg, |
cf8f70bf GN |
5922 | .pio_in_emulated = emulator_pio_in_emulated, |
5923 | .pio_out_emulated = emulator_pio_out_emulated, | |
1aa36616 AK |
5924 | .get_segment = emulator_get_segment, |
5925 | .set_segment = emulator_set_segment, | |
5951c442 | 5926 | .get_cached_segment_base = emulator_get_cached_segment_base, |
2dafc6c2 | 5927 | .get_gdt = emulator_get_gdt, |
160ce1f1 | 5928 | .get_idt = emulator_get_idt, |
1ac9d0cf AK |
5929 | .set_gdt = emulator_set_gdt, |
5930 | .set_idt = emulator_set_idt, | |
52a46617 GN |
5931 | .get_cr = emulator_get_cr, |
5932 | .set_cr = emulator_set_cr, | |
9c537244 | 5933 | .cpl = emulator_get_cpl, |
35aa5375 GN |
5934 | .get_dr = emulator_get_dr, |
5935 | .set_dr = emulator_set_dr, | |
64d60670 PB |
5936 | .get_smbase = emulator_get_smbase, |
5937 | .set_smbase = emulator_set_smbase, | |
717746e3 AK |
5938 | .set_msr = emulator_set_msr, |
5939 | .get_msr = emulator_get_msr, | |
67f4d428 | 5940 | .check_pmc = emulator_check_pmc, |
222d21aa | 5941 | .read_pmc = emulator_read_pmc, |
6c3287f7 | 5942 | .halt = emulator_halt, |
bcaf5cc5 | 5943 | .wbinvd = emulator_wbinvd, |
d6aa1000 | 5944 | .fix_hypercall = emulator_fix_hypercall, |
c4f035c6 | 5945 | .intercept = emulator_intercept, |
bdb42f5a | 5946 | .get_cpuid = emulator_get_cpuid, |
801806d9 | 5947 | .set_nmi_mask = emulator_set_nmi_mask, |
6ed071f0 LP |
5948 | .get_hflags = emulator_get_hflags, |
5949 | .set_hflags = emulator_set_hflags, | |
0234bf88 | 5950 | .pre_leave_smm = emulator_pre_leave_smm, |
bbd9b64e CO |
5951 | }; |
5952 | ||
95cb2295 GN |
5953 | static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |
5954 | { | |
37ccdcbe | 5955 | u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu); |
95cb2295 GN |
5956 | /* |
5957 | * an sti; sti; sequence only disable interrupts for the first | |
5958 | * instruction. So, if the last instruction, be it emulated or | |
5959 | * not, left the system with the INT_STI flag enabled, it | |
5960 | * means that the last instruction is an sti. We should not | |
5961 | * leave the flag on in this case. The same goes for mov ss | |
5962 | */ | |
37ccdcbe PB |
5963 | if (int_shadow & mask) |
5964 | mask = 0; | |
6addfc42 | 5965 | if (unlikely(int_shadow || mask)) { |
95cb2295 | 5966 | kvm_x86_ops->set_interrupt_shadow(vcpu, mask); |
6addfc42 PB |
5967 | if (!mask) |
5968 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
5969 | } | |
95cb2295 GN |
5970 | } |
5971 | ||
ef54bcfe | 5972 | static bool inject_emulated_exception(struct kvm_vcpu *vcpu) |
54b8486f GN |
5973 | { |
5974 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; | |
da9cb575 | 5975 | if (ctxt->exception.vector == PF_VECTOR) |
ef54bcfe PB |
5976 | return kvm_propagate_fault(vcpu, &ctxt->exception); |
5977 | ||
5978 | if (ctxt->exception.error_code_valid) | |
da9cb575 AK |
5979 | kvm_queue_exception_e(vcpu, ctxt->exception.vector, |
5980 | ctxt->exception.error_code); | |
54b8486f | 5981 | else |
da9cb575 | 5982 | kvm_queue_exception(vcpu, ctxt->exception.vector); |
ef54bcfe | 5983 | return false; |
54b8486f GN |
5984 | } |
5985 | ||
8ec4722d MG |
5986 | static void init_emulate_ctxt(struct kvm_vcpu *vcpu) |
5987 | { | |
adf52235 | 5988 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d MG |
5989 | int cs_db, cs_l; |
5990 | ||
8ec4722d MG |
5991 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
5992 | ||
adf52235 | 5993 | ctxt->eflags = kvm_get_rflags(vcpu); |
c8401dda PB |
5994 | ctxt->tf = (ctxt->eflags & X86_EFLAGS_TF) != 0; |
5995 | ||
adf52235 TY |
5996 | ctxt->eip = kvm_rip_read(vcpu); |
5997 | ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : | |
5998 | (ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 : | |
42bf549f | 5999 | (cs_l && is_long_mode(vcpu)) ? X86EMUL_MODE_PROT64 : |
adf52235 TY |
6000 | cs_db ? X86EMUL_MODE_PROT32 : |
6001 | X86EMUL_MODE_PROT16; | |
a584539b | 6002 | BUILD_BUG_ON(HF_GUEST_MASK != X86EMUL_GUEST_MASK); |
64d60670 PB |
6003 | BUILD_BUG_ON(HF_SMM_MASK != X86EMUL_SMM_MASK); |
6004 | BUILD_BUG_ON(HF_SMM_INSIDE_NMI_MASK != X86EMUL_SMM_INSIDE_NMI_MASK); | |
adf52235 | 6005 | |
dd856efa | 6006 | init_decode_cache(ctxt); |
7ae441ea | 6007 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; |
8ec4722d MG |
6008 | } |
6009 | ||
71f9833b | 6010 | int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip) |
63995653 | 6011 | { |
9d74191a | 6012 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
63995653 MG |
6013 | int ret; |
6014 | ||
6015 | init_emulate_ctxt(vcpu); | |
6016 | ||
9dac77fa AK |
6017 | ctxt->op_bytes = 2; |
6018 | ctxt->ad_bytes = 2; | |
6019 | ctxt->_eip = ctxt->eip + inc_eip; | |
9d74191a | 6020 | ret = emulate_int_real(ctxt, irq); |
63995653 MG |
6021 | |
6022 | if (ret != X86EMUL_CONTINUE) | |
6023 | return EMULATE_FAIL; | |
6024 | ||
9dac77fa | 6025 | ctxt->eip = ctxt->_eip; |
9d74191a TY |
6026 | kvm_rip_write(vcpu, ctxt->eip); |
6027 | kvm_set_rflags(vcpu, ctxt->eflags); | |
63995653 | 6028 | |
63995653 MG |
6029 | return EMULATE_DONE; |
6030 | } | |
6031 | EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt); | |
6032 | ||
e2366171 | 6033 | static int handle_emulation_failure(struct kvm_vcpu *vcpu, int emulation_type) |
6d77dbfc | 6034 | { |
fc3a9157 JR |
6035 | int r = EMULATE_DONE; |
6036 | ||
6d77dbfc GN |
6037 | ++vcpu->stat.insn_emulation_fail; |
6038 | trace_kvm_emulate_insn_failed(vcpu); | |
e2366171 LA |
6039 | |
6040 | if (emulation_type & EMULTYPE_NO_UD_ON_FAIL) | |
6041 | return EMULATE_FAIL; | |
6042 | ||
a2b9e6c1 | 6043 | if (!is_guest_mode(vcpu) && kvm_x86_ops->get_cpl(vcpu) == 0) { |
fc3a9157 JR |
6044 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
6045 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
6046 | vcpu->run->internal.ndata = 0; | |
1f4dcb3b | 6047 | r = EMULATE_USER_EXIT; |
fc3a9157 | 6048 | } |
e2366171 | 6049 | |
6d77dbfc | 6050 | kvm_queue_exception(vcpu, UD_VECTOR); |
fc3a9157 JR |
6051 | |
6052 | return r; | |
6d77dbfc GN |
6053 | } |
6054 | ||
93c05d3e | 6055 | static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2, |
991eebf9 GN |
6056 | bool write_fault_to_shadow_pgtable, |
6057 | int emulation_type) | |
a6f177ef | 6058 | { |
95b3cf69 | 6059 | gpa_t gpa = cr2; |
ba049e93 | 6060 | kvm_pfn_t pfn; |
a6f177ef | 6061 | |
384bf221 | 6062 | if (!(emulation_type & EMULTYPE_ALLOW_RETRY)) |
991eebf9 GN |
6063 | return false; |
6064 | ||
6c3dfeb6 SC |
6065 | if (WARN_ON_ONCE(is_guest_mode(vcpu))) |
6066 | return false; | |
6067 | ||
44dd3ffa | 6068 | if (!vcpu->arch.mmu->direct_map) { |
95b3cf69 XG |
6069 | /* |
6070 | * Write permission should be allowed since only | |
6071 | * write access need to be emulated. | |
6072 | */ | |
6073 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
a6f177ef | 6074 | |
95b3cf69 XG |
6075 | /* |
6076 | * If the mapping is invalid in guest, let cpu retry | |
6077 | * it to generate fault. | |
6078 | */ | |
6079 | if (gpa == UNMAPPED_GVA) | |
6080 | return true; | |
6081 | } | |
a6f177ef | 6082 | |
8e3d9d06 XG |
6083 | /* |
6084 | * Do not retry the unhandleable instruction if it faults on the | |
6085 | * readonly host memory, otherwise it will goto a infinite loop: | |
6086 | * retry instruction -> write #PF -> emulation fail -> retry | |
6087 | * instruction -> ... | |
6088 | */ | |
6089 | pfn = gfn_to_pfn(vcpu->kvm, gpa_to_gfn(gpa)); | |
95b3cf69 XG |
6090 | |
6091 | /* | |
6092 | * If the instruction failed on the error pfn, it can not be fixed, | |
6093 | * report the error to userspace. | |
6094 | */ | |
6095 | if (is_error_noslot_pfn(pfn)) | |
6096 | return false; | |
6097 | ||
6098 | kvm_release_pfn_clean(pfn); | |
6099 | ||
6100 | /* The instructions are well-emulated on direct mmu. */ | |
44dd3ffa | 6101 | if (vcpu->arch.mmu->direct_map) { |
95b3cf69 XG |
6102 | unsigned int indirect_shadow_pages; |
6103 | ||
6104 | spin_lock(&vcpu->kvm->mmu_lock); | |
6105 | indirect_shadow_pages = vcpu->kvm->arch.indirect_shadow_pages; | |
6106 | spin_unlock(&vcpu->kvm->mmu_lock); | |
6107 | ||
6108 | if (indirect_shadow_pages) | |
6109 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
6110 | ||
a6f177ef | 6111 | return true; |
8e3d9d06 | 6112 | } |
a6f177ef | 6113 | |
95b3cf69 XG |
6114 | /* |
6115 | * if emulation was due to access to shadowed page table | |
6116 | * and it failed try to unshadow page and re-enter the | |
6117 | * guest to let CPU execute the instruction. | |
6118 | */ | |
6119 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
93c05d3e XG |
6120 | |
6121 | /* | |
6122 | * If the access faults on its page table, it can not | |
6123 | * be fixed by unprotecting shadow page and it should | |
6124 | * be reported to userspace. | |
6125 | */ | |
6126 | return !write_fault_to_shadow_pgtable; | |
a6f177ef GN |
6127 | } |
6128 | ||
1cb3f3ae XG |
6129 | static bool retry_instruction(struct x86_emulate_ctxt *ctxt, |
6130 | unsigned long cr2, int emulation_type) | |
6131 | { | |
6132 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
6133 | unsigned long last_retry_eip, last_retry_addr, gpa = cr2; | |
6134 | ||
6135 | last_retry_eip = vcpu->arch.last_retry_eip; | |
6136 | last_retry_addr = vcpu->arch.last_retry_addr; | |
6137 | ||
6138 | /* | |
6139 | * If the emulation is caused by #PF and it is non-page_table | |
6140 | * writing instruction, it means the VM-EXIT is caused by shadow | |
6141 | * page protected, we can zap the shadow page and retry this | |
6142 | * instruction directly. | |
6143 | * | |
6144 | * Note: if the guest uses a non-page-table modifying instruction | |
6145 | * on the PDE that points to the instruction, then we will unmap | |
6146 | * the instruction and go to an infinite loop. So, we cache the | |
6147 | * last retried eip and the last fault address, if we meet the eip | |
6148 | * and the address again, we can break out of the potential infinite | |
6149 | * loop. | |
6150 | */ | |
6151 | vcpu->arch.last_retry_eip = vcpu->arch.last_retry_addr = 0; | |
6152 | ||
384bf221 | 6153 | if (!(emulation_type & EMULTYPE_ALLOW_RETRY)) |
1cb3f3ae XG |
6154 | return false; |
6155 | ||
6c3dfeb6 SC |
6156 | if (WARN_ON_ONCE(is_guest_mode(vcpu))) |
6157 | return false; | |
6158 | ||
1cb3f3ae XG |
6159 | if (x86_page_table_writing_insn(ctxt)) |
6160 | return false; | |
6161 | ||
6162 | if (ctxt->eip == last_retry_eip && last_retry_addr == cr2) | |
6163 | return false; | |
6164 | ||
6165 | vcpu->arch.last_retry_eip = ctxt->eip; | |
6166 | vcpu->arch.last_retry_addr = cr2; | |
6167 | ||
44dd3ffa | 6168 | if (!vcpu->arch.mmu->direct_map) |
1cb3f3ae XG |
6169 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); |
6170 | ||
22368028 | 6171 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); |
1cb3f3ae XG |
6172 | |
6173 | return true; | |
6174 | } | |
6175 | ||
716d51ab GN |
6176 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu); |
6177 | static int complete_emulated_pio(struct kvm_vcpu *vcpu); | |
6178 | ||
64d60670 | 6179 | static void kvm_smm_changed(struct kvm_vcpu *vcpu) |
a584539b | 6180 | { |
64d60670 | 6181 | if (!(vcpu->arch.hflags & HF_SMM_MASK)) { |
660a5d51 PB |
6182 | /* This is a good place to trace that we are exiting SMM. */ |
6183 | trace_kvm_enter_smm(vcpu->vcpu_id, vcpu->arch.smbase, false); | |
6184 | ||
c43203ca PB |
6185 | /* Process a latched INIT or SMI, if any. */ |
6186 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
64d60670 | 6187 | } |
699023e2 PB |
6188 | |
6189 | kvm_mmu_reset_context(vcpu); | |
64d60670 PB |
6190 | } |
6191 | ||
6192 | static void kvm_set_hflags(struct kvm_vcpu *vcpu, unsigned emul_flags) | |
6193 | { | |
6194 | unsigned changed = vcpu->arch.hflags ^ emul_flags; | |
6195 | ||
a584539b | 6196 | vcpu->arch.hflags = emul_flags; |
64d60670 PB |
6197 | |
6198 | if (changed & HF_SMM_MASK) | |
6199 | kvm_smm_changed(vcpu); | |
a584539b PB |
6200 | } |
6201 | ||
4a1e10d5 PB |
6202 | static int kvm_vcpu_check_hw_bp(unsigned long addr, u32 type, u32 dr7, |
6203 | unsigned long *db) | |
6204 | { | |
6205 | u32 dr6 = 0; | |
6206 | int i; | |
6207 | u32 enable, rwlen; | |
6208 | ||
6209 | enable = dr7; | |
6210 | rwlen = dr7 >> 16; | |
6211 | for (i = 0; i < 4; i++, enable >>= 2, rwlen >>= 4) | |
6212 | if ((enable & 3) && (rwlen & 15) == type && db[i] == addr) | |
6213 | dr6 |= (1 << i); | |
6214 | return dr6; | |
6215 | } | |
6216 | ||
c8401dda | 6217 | static void kvm_vcpu_do_singlestep(struct kvm_vcpu *vcpu, int *r) |
663f4c61 PB |
6218 | { |
6219 | struct kvm_run *kvm_run = vcpu->run; | |
6220 | ||
c8401dda PB |
6221 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) { |
6222 | kvm_run->debug.arch.dr6 = DR6_BS | DR6_FIXED_1 | DR6_RTM; | |
6223 | kvm_run->debug.arch.pc = vcpu->arch.singlestep_rip; | |
6224 | kvm_run->debug.arch.exception = DB_VECTOR; | |
6225 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
6226 | *r = EMULATE_USER_EXIT; | |
6227 | } else { | |
f10c729f | 6228 | kvm_queue_exception_p(vcpu, DB_VECTOR, DR6_BS); |
663f4c61 PB |
6229 | } |
6230 | } | |
6231 | ||
6affcbed KH |
6232 | int kvm_skip_emulated_instruction(struct kvm_vcpu *vcpu) |
6233 | { | |
6234 | unsigned long rflags = kvm_x86_ops->get_rflags(vcpu); | |
6235 | int r = EMULATE_DONE; | |
6236 | ||
6237 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
c8401dda PB |
6238 | |
6239 | /* | |
6240 | * rflags is the old, "raw" value of the flags. The new value has | |
6241 | * not been saved yet. | |
6242 | * | |
6243 | * This is correct even for TF set by the guest, because "the | |
6244 | * processor will not generate this exception after the instruction | |
6245 | * that sets the TF flag". | |
6246 | */ | |
6247 | if (unlikely(rflags & X86_EFLAGS_TF)) | |
6248 | kvm_vcpu_do_singlestep(vcpu, &r); | |
6affcbed KH |
6249 | return r == EMULATE_DONE; |
6250 | } | |
6251 | EXPORT_SYMBOL_GPL(kvm_skip_emulated_instruction); | |
6252 | ||
4a1e10d5 PB |
6253 | static bool kvm_vcpu_check_breakpoint(struct kvm_vcpu *vcpu, int *r) |
6254 | { | |
4a1e10d5 PB |
6255 | if (unlikely(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) && |
6256 | (vcpu->arch.guest_debug_dr7 & DR7_BP_EN_MASK)) { | |
82b32774 NA |
6257 | struct kvm_run *kvm_run = vcpu->run; |
6258 | unsigned long eip = kvm_get_linear_rip(vcpu); | |
6259 | u32 dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
4a1e10d5 PB |
6260 | vcpu->arch.guest_debug_dr7, |
6261 | vcpu->arch.eff_db); | |
6262 | ||
6263 | if (dr6 != 0) { | |
6f43ed01 | 6264 | kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1 | DR6_RTM; |
82b32774 | 6265 | kvm_run->debug.arch.pc = eip; |
4a1e10d5 PB |
6266 | kvm_run->debug.arch.exception = DB_VECTOR; |
6267 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
6268 | *r = EMULATE_USER_EXIT; | |
6269 | return true; | |
6270 | } | |
6271 | } | |
6272 | ||
4161a569 NA |
6273 | if (unlikely(vcpu->arch.dr7 & DR7_BP_EN_MASK) && |
6274 | !(kvm_get_rflags(vcpu) & X86_EFLAGS_RF)) { | |
82b32774 NA |
6275 | unsigned long eip = kvm_get_linear_rip(vcpu); |
6276 | u32 dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
4a1e10d5 PB |
6277 | vcpu->arch.dr7, |
6278 | vcpu->arch.db); | |
6279 | ||
6280 | if (dr6 != 0) { | |
6281 | vcpu->arch.dr6 &= ~15; | |
6f43ed01 | 6282 | vcpu->arch.dr6 |= dr6 | DR6_RTM; |
4a1e10d5 PB |
6283 | kvm_queue_exception(vcpu, DB_VECTOR); |
6284 | *r = EMULATE_DONE; | |
6285 | return true; | |
6286 | } | |
6287 | } | |
6288 | ||
6289 | return false; | |
6290 | } | |
6291 | ||
04789b66 LA |
6292 | static bool is_vmware_backdoor_opcode(struct x86_emulate_ctxt *ctxt) |
6293 | { | |
2d7921c4 AM |
6294 | switch (ctxt->opcode_len) { |
6295 | case 1: | |
6296 | switch (ctxt->b) { | |
6297 | case 0xe4: /* IN */ | |
6298 | case 0xe5: | |
6299 | case 0xec: | |
6300 | case 0xed: | |
6301 | case 0xe6: /* OUT */ | |
6302 | case 0xe7: | |
6303 | case 0xee: | |
6304 | case 0xef: | |
6305 | case 0x6c: /* INS */ | |
6306 | case 0x6d: | |
6307 | case 0x6e: /* OUTS */ | |
6308 | case 0x6f: | |
6309 | return true; | |
6310 | } | |
6311 | break; | |
6312 | case 2: | |
6313 | switch (ctxt->b) { | |
6314 | case 0x33: /* RDPMC */ | |
6315 | return true; | |
6316 | } | |
6317 | break; | |
04789b66 LA |
6318 | } |
6319 | ||
6320 | return false; | |
6321 | } | |
6322 | ||
51d8b661 AP |
6323 | int x86_emulate_instruction(struct kvm_vcpu *vcpu, |
6324 | unsigned long cr2, | |
dc25e89e AP |
6325 | int emulation_type, |
6326 | void *insn, | |
6327 | int insn_len) | |
bbd9b64e | 6328 | { |
95cb2295 | 6329 | int r; |
9d74191a | 6330 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
7ae441ea | 6331 | bool writeback = true; |
93c05d3e | 6332 | bool write_fault_to_spt = vcpu->arch.write_fault_to_shadow_pgtable; |
bbd9b64e | 6333 | |
c595ceee PB |
6334 | vcpu->arch.l1tf_flush_l1d = true; |
6335 | ||
93c05d3e XG |
6336 | /* |
6337 | * Clear write_fault_to_shadow_pgtable here to ensure it is | |
6338 | * never reused. | |
6339 | */ | |
6340 | vcpu->arch.write_fault_to_shadow_pgtable = false; | |
26eef70c | 6341 | kvm_clear_exception_queue(vcpu); |
8d7d8102 | 6342 | |
571008da | 6343 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
8ec4722d | 6344 | init_emulate_ctxt(vcpu); |
4a1e10d5 PB |
6345 | |
6346 | /* | |
6347 | * We will reenter on the same instruction since | |
6348 | * we do not set complete_userspace_io. This does not | |
6349 | * handle watchpoints yet, those would be handled in | |
6350 | * the emulate_ops. | |
6351 | */ | |
d391f120 VK |
6352 | if (!(emulation_type & EMULTYPE_SKIP) && |
6353 | kvm_vcpu_check_breakpoint(vcpu, &r)) | |
4a1e10d5 PB |
6354 | return r; |
6355 | ||
9d74191a TY |
6356 | ctxt->interruptibility = 0; |
6357 | ctxt->have_exception = false; | |
e0ad0b47 | 6358 | ctxt->exception.vector = -1; |
9d74191a | 6359 | ctxt->perm_ok = false; |
bbd9b64e | 6360 | |
b51e974f | 6361 | ctxt->ud = emulation_type & EMULTYPE_TRAP_UD; |
4005996e | 6362 | |
9d74191a | 6363 | r = x86_decode_insn(ctxt, insn, insn_len); |
bbd9b64e | 6364 | |
e46479f8 | 6365 | trace_kvm_emulate_insn_start(vcpu); |
f2b5756b | 6366 | ++vcpu->stat.insn_emulation; |
1d2887e2 | 6367 | if (r != EMULATION_OK) { |
4005996e AK |
6368 | if (emulation_type & EMULTYPE_TRAP_UD) |
6369 | return EMULATE_FAIL; | |
991eebf9 GN |
6370 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
6371 | emulation_type)) | |
bbd9b64e | 6372 | return EMULATE_DONE; |
6ea6e843 PB |
6373 | if (ctxt->have_exception && inject_emulated_exception(vcpu)) |
6374 | return EMULATE_DONE; | |
6d77dbfc GN |
6375 | if (emulation_type & EMULTYPE_SKIP) |
6376 | return EMULATE_FAIL; | |
e2366171 | 6377 | return handle_emulation_failure(vcpu, emulation_type); |
bbd9b64e CO |
6378 | } |
6379 | } | |
6380 | ||
04789b66 LA |
6381 | if ((emulation_type & EMULTYPE_VMWARE) && |
6382 | !is_vmware_backdoor_opcode(ctxt)) | |
6383 | return EMULATE_FAIL; | |
6384 | ||
ba8afb6b | 6385 | if (emulation_type & EMULTYPE_SKIP) { |
9dac77fa | 6386 | kvm_rip_write(vcpu, ctxt->_eip); |
bb663c7a NA |
6387 | if (ctxt->eflags & X86_EFLAGS_RF) |
6388 | kvm_set_rflags(vcpu, ctxt->eflags & ~X86_EFLAGS_RF); | |
ba8afb6b GN |
6389 | return EMULATE_DONE; |
6390 | } | |
6391 | ||
1cb3f3ae XG |
6392 | if (retry_instruction(ctxt, cr2, emulation_type)) |
6393 | return EMULATE_DONE; | |
6394 | ||
7ae441ea | 6395 | /* this is needed for vmware backdoor interface to work since it |
4d2179e1 | 6396 | changes registers values during IO operation */ |
7ae441ea GN |
6397 | if (vcpu->arch.emulate_regs_need_sync_from_vcpu) { |
6398 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; | |
dd856efa | 6399 | emulator_invalidate_register_cache(ctxt); |
7ae441ea | 6400 | } |
4d2179e1 | 6401 | |
5cd21917 | 6402 | restart: |
0f89b207 TL |
6403 | /* Save the faulting GPA (cr2) in the address field */ |
6404 | ctxt->exception.address = cr2; | |
6405 | ||
9d74191a | 6406 | r = x86_emulate_insn(ctxt); |
bbd9b64e | 6407 | |
775fde86 JR |
6408 | if (r == EMULATION_INTERCEPTED) |
6409 | return EMULATE_DONE; | |
6410 | ||
d2ddd1c4 | 6411 | if (r == EMULATION_FAILED) { |
991eebf9 GN |
6412 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
6413 | emulation_type)) | |
c3cd7ffa GN |
6414 | return EMULATE_DONE; |
6415 | ||
e2366171 | 6416 | return handle_emulation_failure(vcpu, emulation_type); |
bbd9b64e CO |
6417 | } |
6418 | ||
9d74191a | 6419 | if (ctxt->have_exception) { |
d2ddd1c4 | 6420 | r = EMULATE_DONE; |
ef54bcfe PB |
6421 | if (inject_emulated_exception(vcpu)) |
6422 | return r; | |
d2ddd1c4 | 6423 | } else if (vcpu->arch.pio.count) { |
0912c977 PB |
6424 | if (!vcpu->arch.pio.in) { |
6425 | /* FIXME: return into emulator if single-stepping. */ | |
3457e419 | 6426 | vcpu->arch.pio.count = 0; |
0912c977 | 6427 | } else { |
7ae441ea | 6428 | writeback = false; |
716d51ab GN |
6429 | vcpu->arch.complete_userspace_io = complete_emulated_pio; |
6430 | } | |
ac0a48c3 | 6431 | r = EMULATE_USER_EXIT; |
7ae441ea GN |
6432 | } else if (vcpu->mmio_needed) { |
6433 | if (!vcpu->mmio_is_write) | |
6434 | writeback = false; | |
ac0a48c3 | 6435 | r = EMULATE_USER_EXIT; |
716d51ab | 6436 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; |
7ae441ea | 6437 | } else if (r == EMULATION_RESTART) |
5cd21917 | 6438 | goto restart; |
d2ddd1c4 GN |
6439 | else |
6440 | r = EMULATE_DONE; | |
f850e2e6 | 6441 | |
7ae441ea | 6442 | if (writeback) { |
6addfc42 | 6443 | unsigned long rflags = kvm_x86_ops->get_rflags(vcpu); |
9d74191a | 6444 | toggle_interruptibility(vcpu, ctxt->interruptibility); |
7ae441ea | 6445 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
9d74191a | 6446 | kvm_rip_write(vcpu, ctxt->eip); |
c8401dda PB |
6447 | if (r == EMULATE_DONE && |
6448 | (ctxt->tf || (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP))) | |
6449 | kvm_vcpu_do_singlestep(vcpu, &r); | |
38827dbd NA |
6450 | if (!ctxt->have_exception || |
6451 | exception_type(ctxt->exception.vector) == EXCPT_TRAP) | |
6452 | __kvm_set_rflags(vcpu, ctxt->eflags); | |
6addfc42 PB |
6453 | |
6454 | /* | |
6455 | * For STI, interrupts are shadowed; so KVM_REQ_EVENT will | |
6456 | * do nothing, and it will be requested again as soon as | |
6457 | * the shadow expires. But we still need to check here, | |
6458 | * because POPF has no interrupt shadow. | |
6459 | */ | |
6460 | if (unlikely((ctxt->eflags & ~rflags) & X86_EFLAGS_IF)) | |
6461 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
7ae441ea GN |
6462 | } else |
6463 | vcpu->arch.emulate_regs_need_sync_to_vcpu = true; | |
e85d28f8 GN |
6464 | |
6465 | return r; | |
de7d789a | 6466 | } |
c60658d1 SC |
6467 | |
6468 | int kvm_emulate_instruction(struct kvm_vcpu *vcpu, int emulation_type) | |
6469 | { | |
6470 | return x86_emulate_instruction(vcpu, 0, emulation_type, NULL, 0); | |
6471 | } | |
6472 | EXPORT_SYMBOL_GPL(kvm_emulate_instruction); | |
6473 | ||
6474 | int kvm_emulate_instruction_from_buffer(struct kvm_vcpu *vcpu, | |
6475 | void *insn, int insn_len) | |
6476 | { | |
6477 | return x86_emulate_instruction(vcpu, 0, 0, insn, insn_len); | |
6478 | } | |
6479 | EXPORT_SYMBOL_GPL(kvm_emulate_instruction_from_buffer); | |
de7d789a | 6480 | |
dca7f128 SC |
6481 | static int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, |
6482 | unsigned short port) | |
de7d789a | 6483 | { |
cf8f70bf | 6484 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
ca1d4a9e AK |
6485 | int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt, |
6486 | size, port, &val, 1); | |
cf8f70bf | 6487 | /* do not return to emulator after return from userspace */ |
7972995b | 6488 | vcpu->arch.pio.count = 0; |
de7d789a CO |
6489 | return ret; |
6490 | } | |
de7d789a | 6491 | |
8370c3d0 TL |
6492 | static int complete_fast_pio_in(struct kvm_vcpu *vcpu) |
6493 | { | |
6494 | unsigned long val; | |
6495 | ||
6496 | /* We should only ever be called with arch.pio.count equal to 1 */ | |
6497 | BUG_ON(vcpu->arch.pio.count != 1); | |
6498 | ||
6499 | /* For size less than 4 we merge, else we zero extend */ | |
6500 | val = (vcpu->arch.pio.size < 4) ? kvm_register_read(vcpu, VCPU_REGS_RAX) | |
6501 | : 0; | |
6502 | ||
6503 | /* | |
6504 | * Since vcpu->arch.pio.count == 1 let emulator_pio_in_emulated perform | |
6505 | * the copy and tracing | |
6506 | */ | |
6507 | emulator_pio_in_emulated(&vcpu->arch.emulate_ctxt, vcpu->arch.pio.size, | |
6508 | vcpu->arch.pio.port, &val, 1); | |
6509 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); | |
6510 | ||
6511 | return 1; | |
6512 | } | |
6513 | ||
dca7f128 SC |
6514 | static int kvm_fast_pio_in(struct kvm_vcpu *vcpu, int size, |
6515 | unsigned short port) | |
8370c3d0 TL |
6516 | { |
6517 | unsigned long val; | |
6518 | int ret; | |
6519 | ||
6520 | /* For size less than 4 we merge, else we zero extend */ | |
6521 | val = (size < 4) ? kvm_register_read(vcpu, VCPU_REGS_RAX) : 0; | |
6522 | ||
6523 | ret = emulator_pio_in_emulated(&vcpu->arch.emulate_ctxt, size, port, | |
6524 | &val, 1); | |
6525 | if (ret) { | |
6526 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); | |
6527 | return ret; | |
6528 | } | |
6529 | ||
6530 | vcpu->arch.complete_userspace_io = complete_fast_pio_in; | |
6531 | ||
6532 | return 0; | |
6533 | } | |
dca7f128 SC |
6534 | |
6535 | int kvm_fast_pio(struct kvm_vcpu *vcpu, int size, unsigned short port, int in) | |
6536 | { | |
6537 | int ret = kvm_skip_emulated_instruction(vcpu); | |
6538 | ||
6539 | /* | |
6540 | * TODO: we might be squashing a KVM_GUESTDBG_SINGLESTEP-triggered | |
6541 | * KVM_EXIT_DEBUG here. | |
6542 | */ | |
6543 | if (in) | |
6544 | return kvm_fast_pio_in(vcpu, size, port) && ret; | |
6545 | else | |
6546 | return kvm_fast_pio_out(vcpu, size, port) && ret; | |
6547 | } | |
6548 | EXPORT_SYMBOL_GPL(kvm_fast_pio); | |
8370c3d0 | 6549 | |
251a5fd6 | 6550 | static int kvmclock_cpu_down_prep(unsigned int cpu) |
8cfdc000 | 6551 | { |
0a3aee0d | 6552 | __this_cpu_write(cpu_tsc_khz, 0); |
251a5fd6 | 6553 | return 0; |
8cfdc000 ZA |
6554 | } |
6555 | ||
6556 | static void tsc_khz_changed(void *data) | |
c8076604 | 6557 | { |
8cfdc000 ZA |
6558 | struct cpufreq_freqs *freq = data; |
6559 | unsigned long khz = 0; | |
6560 | ||
6561 | if (data) | |
6562 | khz = freq->new; | |
6563 | else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) | |
6564 | khz = cpufreq_quick_get(raw_smp_processor_id()); | |
6565 | if (!khz) | |
6566 | khz = tsc_khz; | |
0a3aee0d | 6567 | __this_cpu_write(cpu_tsc_khz, khz); |
c8076604 GH |
6568 | } |
6569 | ||
5fa4ec9c | 6570 | #ifdef CONFIG_X86_64 |
0092e434 VK |
6571 | static void kvm_hyperv_tsc_notifier(void) |
6572 | { | |
0092e434 VK |
6573 | struct kvm *kvm; |
6574 | struct kvm_vcpu *vcpu; | |
6575 | int cpu; | |
6576 | ||
6577 | spin_lock(&kvm_lock); | |
6578 | list_for_each_entry(kvm, &vm_list, vm_list) | |
6579 | kvm_make_mclock_inprogress_request(kvm); | |
6580 | ||
6581 | hyperv_stop_tsc_emulation(); | |
6582 | ||
6583 | /* TSC frequency always matches when on Hyper-V */ | |
6584 | for_each_present_cpu(cpu) | |
6585 | per_cpu(cpu_tsc_khz, cpu) = tsc_khz; | |
6586 | kvm_max_guest_tsc_khz = tsc_khz; | |
6587 | ||
6588 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
6589 | struct kvm_arch *ka = &kvm->arch; | |
6590 | ||
6591 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
6592 | ||
6593 | pvclock_update_vm_gtod_copy(kvm); | |
6594 | ||
6595 | kvm_for_each_vcpu(cpu, vcpu, kvm) | |
6596 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); | |
6597 | ||
6598 | kvm_for_each_vcpu(cpu, vcpu, kvm) | |
6599 | kvm_clear_request(KVM_REQ_MCLOCK_INPROGRESS, vcpu); | |
6600 | ||
6601 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
6602 | } | |
6603 | spin_unlock(&kvm_lock); | |
0092e434 | 6604 | } |
5fa4ec9c | 6605 | #endif |
0092e434 | 6606 | |
c8076604 GH |
6607 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
6608 | void *data) | |
6609 | { | |
6610 | struct cpufreq_freqs *freq = data; | |
6611 | struct kvm *kvm; | |
6612 | struct kvm_vcpu *vcpu; | |
6613 | int i, send_ipi = 0; | |
6614 | ||
8cfdc000 ZA |
6615 | /* |
6616 | * We allow guests to temporarily run on slowing clocks, | |
6617 | * provided we notify them after, or to run on accelerating | |
6618 | * clocks, provided we notify them before. Thus time never | |
6619 | * goes backwards. | |
6620 | * | |
6621 | * However, we have a problem. We can't atomically update | |
6622 | * the frequency of a given CPU from this function; it is | |
6623 | * merely a notifier, which can be called from any CPU. | |
6624 | * Changing the TSC frequency at arbitrary points in time | |
6625 | * requires a recomputation of local variables related to | |
6626 | * the TSC for each VCPU. We must flag these local variables | |
6627 | * to be updated and be sure the update takes place with the | |
6628 | * new frequency before any guests proceed. | |
6629 | * | |
6630 | * Unfortunately, the combination of hotplug CPU and frequency | |
6631 | * change creates an intractable locking scenario; the order | |
6632 | * of when these callouts happen is undefined with respect to | |
6633 | * CPU hotplug, and they can race with each other. As such, | |
6634 | * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is | |
6635 | * undefined; you can actually have a CPU frequency change take | |
6636 | * place in between the computation of X and the setting of the | |
6637 | * variable. To protect against this problem, all updates of | |
6638 | * the per_cpu tsc_khz variable are done in an interrupt | |
6639 | * protected IPI, and all callers wishing to update the value | |
6640 | * must wait for a synchronous IPI to complete (which is trivial | |
6641 | * if the caller is on the CPU already). This establishes the | |
6642 | * necessary total order on variable updates. | |
6643 | * | |
6644 | * Note that because a guest time update may take place | |
6645 | * anytime after the setting of the VCPU's request bit, the | |
6646 | * correct TSC value must be set before the request. However, | |
6647 | * to ensure the update actually makes it to any guest which | |
6648 | * starts running in hardware virtualization between the set | |
6649 | * and the acquisition of the spinlock, we must also ping the | |
6650 | * CPU after setting the request bit. | |
6651 | * | |
6652 | */ | |
6653 | ||
c8076604 GH |
6654 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
6655 | return 0; | |
6656 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
6657 | return 0; | |
8cfdc000 ZA |
6658 | |
6659 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); | |
c8076604 | 6660 | |
2f303b74 | 6661 | spin_lock(&kvm_lock); |
c8076604 | 6662 | list_for_each_entry(kvm, &vm_list, vm_list) { |
988a2cae | 6663 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
6664 | if (vcpu->cpu != freq->cpu) |
6665 | continue; | |
c285545f | 6666 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
c8076604 | 6667 | if (vcpu->cpu != smp_processor_id()) |
8cfdc000 | 6668 | send_ipi = 1; |
c8076604 GH |
6669 | } |
6670 | } | |
2f303b74 | 6671 | spin_unlock(&kvm_lock); |
c8076604 GH |
6672 | |
6673 | if (freq->old < freq->new && send_ipi) { | |
6674 | /* | |
6675 | * We upscale the frequency. Must make the guest | |
6676 | * doesn't see old kvmclock values while running with | |
6677 | * the new frequency, otherwise we risk the guest sees | |
6678 | * time go backwards. | |
6679 | * | |
6680 | * In case we update the frequency for another cpu | |
6681 | * (which might be in guest context) send an interrupt | |
6682 | * to kick the cpu out of guest context. Next time | |
6683 | * guest context is entered kvmclock will be updated, | |
6684 | * so the guest will not see stale values. | |
6685 | */ | |
8cfdc000 | 6686 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); |
c8076604 GH |
6687 | } |
6688 | return 0; | |
6689 | } | |
6690 | ||
6691 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
8cfdc000 ZA |
6692 | .notifier_call = kvmclock_cpufreq_notifier |
6693 | }; | |
6694 | ||
251a5fd6 | 6695 | static int kvmclock_cpu_online(unsigned int cpu) |
8cfdc000 | 6696 | { |
251a5fd6 SAS |
6697 | tsc_khz_changed(NULL); |
6698 | return 0; | |
8cfdc000 ZA |
6699 | } |
6700 | ||
b820cc0c ZA |
6701 | static void kvm_timer_init(void) |
6702 | { | |
c285545f | 6703 | max_tsc_khz = tsc_khz; |
460dd42e | 6704 | |
b820cc0c | 6705 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
c285545f ZA |
6706 | #ifdef CONFIG_CPU_FREQ |
6707 | struct cpufreq_policy policy; | |
758f588d BP |
6708 | int cpu; |
6709 | ||
c285545f | 6710 | memset(&policy, 0, sizeof(policy)); |
3e26f230 AK |
6711 | cpu = get_cpu(); |
6712 | cpufreq_get_policy(&policy, cpu); | |
c285545f ZA |
6713 | if (policy.cpuinfo.max_freq) |
6714 | max_tsc_khz = policy.cpuinfo.max_freq; | |
3e26f230 | 6715 | put_cpu(); |
c285545f | 6716 | #endif |
b820cc0c ZA |
6717 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
6718 | CPUFREQ_TRANSITION_NOTIFIER); | |
6719 | } | |
c285545f | 6720 | pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz); |
460dd42e | 6721 | |
73c1b41e | 6722 | cpuhp_setup_state(CPUHP_AP_X86_KVM_CLK_ONLINE, "x86/kvm/clk:online", |
251a5fd6 | 6723 | kvmclock_cpu_online, kvmclock_cpu_down_prep); |
b820cc0c ZA |
6724 | } |
6725 | ||
dd60d217 AK |
6726 | DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
6727 | EXPORT_PER_CPU_SYMBOL_GPL(current_vcpu); | |
ff9d07a0 | 6728 | |
f5132b01 | 6729 | int kvm_is_in_guest(void) |
ff9d07a0 | 6730 | { |
086c9855 | 6731 | return __this_cpu_read(current_vcpu) != NULL; |
ff9d07a0 ZY |
6732 | } |
6733 | ||
6734 | static int kvm_is_user_mode(void) | |
6735 | { | |
6736 | int user_mode = 3; | |
dcf46b94 | 6737 | |
086c9855 AS |
6738 | if (__this_cpu_read(current_vcpu)) |
6739 | user_mode = kvm_x86_ops->get_cpl(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 6740 | |
ff9d07a0 ZY |
6741 | return user_mode != 0; |
6742 | } | |
6743 | ||
6744 | static unsigned long kvm_get_guest_ip(void) | |
6745 | { | |
6746 | unsigned long ip = 0; | |
dcf46b94 | 6747 | |
086c9855 AS |
6748 | if (__this_cpu_read(current_vcpu)) |
6749 | ip = kvm_rip_read(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 6750 | |
ff9d07a0 ZY |
6751 | return ip; |
6752 | } | |
6753 | ||
6754 | static struct perf_guest_info_callbacks kvm_guest_cbs = { | |
6755 | .is_in_guest = kvm_is_in_guest, | |
6756 | .is_user_mode = kvm_is_user_mode, | |
6757 | .get_guest_ip = kvm_get_guest_ip, | |
6758 | }; | |
6759 | ||
ce88decf XG |
6760 | static void kvm_set_mmio_spte_mask(void) |
6761 | { | |
6762 | u64 mask; | |
6763 | int maxphyaddr = boot_cpu_data.x86_phys_bits; | |
6764 | ||
6765 | /* | |
6766 | * Set the reserved bits and the present bit of an paging-structure | |
6767 | * entry to generate page fault with PFER.RSV = 1. | |
6768 | */ | |
28a1f3ac JS |
6769 | |
6770 | /* | |
6771 | * Mask the uppermost physical address bit, which would be reserved as | |
6772 | * long as the supported physical address width is less than 52. | |
6773 | */ | |
6774 | mask = 1ull << 51; | |
885032b9 | 6775 | |
885032b9 | 6776 | /* Set the present bit. */ |
ce88decf XG |
6777 | mask |= 1ull; |
6778 | ||
ce88decf XG |
6779 | /* |
6780 | * If reserved bit is not supported, clear the present bit to disable | |
6781 | * mmio page fault. | |
6782 | */ | |
7288bde1 | 6783 | if (IS_ENABLED(CONFIG_X86_64) && maxphyaddr == 52) |
ce88decf | 6784 | mask &= ~1ull; |
ce88decf | 6785 | |
dcdca5fe | 6786 | kvm_mmu_set_mmio_spte_mask(mask, mask); |
ce88decf XG |
6787 | } |
6788 | ||
16e8d74d MT |
6789 | #ifdef CONFIG_X86_64 |
6790 | static void pvclock_gtod_update_fn(struct work_struct *work) | |
6791 | { | |
d828199e MT |
6792 | struct kvm *kvm; |
6793 | ||
6794 | struct kvm_vcpu *vcpu; | |
6795 | int i; | |
6796 | ||
2f303b74 | 6797 | spin_lock(&kvm_lock); |
d828199e MT |
6798 | list_for_each_entry(kvm, &vm_list, vm_list) |
6799 | kvm_for_each_vcpu(i, vcpu, kvm) | |
105b21bb | 6800 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
d828199e | 6801 | atomic_set(&kvm_guest_has_master_clock, 0); |
2f303b74 | 6802 | spin_unlock(&kvm_lock); |
16e8d74d MT |
6803 | } |
6804 | ||
6805 | static DECLARE_WORK(pvclock_gtod_work, pvclock_gtod_update_fn); | |
6806 | ||
6807 | /* | |
6808 | * Notification about pvclock gtod data update. | |
6809 | */ | |
6810 | static int pvclock_gtod_notify(struct notifier_block *nb, unsigned long unused, | |
6811 | void *priv) | |
6812 | { | |
6813 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
6814 | struct timekeeper *tk = priv; | |
6815 | ||
6816 | update_pvclock_gtod(tk); | |
6817 | ||
6818 | /* disable master clock if host does not trust, or does not | |
b0c39dc6 | 6819 | * use, TSC based clocksource. |
16e8d74d | 6820 | */ |
b0c39dc6 | 6821 | if (!gtod_is_based_on_tsc(gtod->clock.vclock_mode) && |
16e8d74d MT |
6822 | atomic_read(&kvm_guest_has_master_clock) != 0) |
6823 | queue_work(system_long_wq, &pvclock_gtod_work); | |
6824 | ||
6825 | return 0; | |
6826 | } | |
6827 | ||
6828 | static struct notifier_block pvclock_gtod_notifier = { | |
6829 | .notifier_call = pvclock_gtod_notify, | |
6830 | }; | |
6831 | #endif | |
6832 | ||
f8c16bba | 6833 | int kvm_arch_init(void *opaque) |
043405e1 | 6834 | { |
b820cc0c | 6835 | int r; |
6b61edf7 | 6836 | struct kvm_x86_ops *ops = opaque; |
f8c16bba | 6837 | |
f8c16bba ZX |
6838 | if (kvm_x86_ops) { |
6839 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
6840 | r = -EEXIST; |
6841 | goto out; | |
f8c16bba ZX |
6842 | } |
6843 | ||
6844 | if (!ops->cpu_has_kvm_support()) { | |
6845 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
6846 | r = -EOPNOTSUPP; |
6847 | goto out; | |
f8c16bba ZX |
6848 | } |
6849 | if (ops->disabled_by_bios()) { | |
6850 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
6851 | r = -EOPNOTSUPP; |
6852 | goto out; | |
f8c16bba ZX |
6853 | } |
6854 | ||
013f6a5d MT |
6855 | r = -ENOMEM; |
6856 | shared_msrs = alloc_percpu(struct kvm_shared_msrs); | |
6857 | if (!shared_msrs) { | |
6858 | printk(KERN_ERR "kvm: failed to allocate percpu kvm_shared_msrs\n"); | |
6859 | goto out; | |
6860 | } | |
6861 | ||
97db56ce AK |
6862 | r = kvm_mmu_module_init(); |
6863 | if (r) | |
013f6a5d | 6864 | goto out_free_percpu; |
97db56ce | 6865 | |
ce88decf | 6866 | kvm_set_mmio_spte_mask(); |
97db56ce | 6867 | |
f8c16bba | 6868 | kvm_x86_ops = ops; |
920c8377 | 6869 | |
7b52345e | 6870 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, |
ffb128c8 | 6871 | PT_DIRTY_MASK, PT64_NX_MASK, 0, |
d0ec49d4 | 6872 | PT_PRESENT_MASK, 0, sme_me_mask); |
b820cc0c | 6873 | kvm_timer_init(); |
c8076604 | 6874 | |
ff9d07a0 ZY |
6875 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
6876 | ||
d366bf7e | 6877 | if (boot_cpu_has(X86_FEATURE_XSAVE)) |
2acf923e DC |
6878 | host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); |
6879 | ||
c5cc421b | 6880 | kvm_lapic_init(); |
16e8d74d MT |
6881 | #ifdef CONFIG_X86_64 |
6882 | pvclock_gtod_register_notifier(&pvclock_gtod_notifier); | |
0092e434 | 6883 | |
5fa4ec9c | 6884 | if (hypervisor_is_type(X86_HYPER_MS_HYPERV)) |
0092e434 | 6885 | set_hv_tscchange_cb(kvm_hyperv_tsc_notifier); |
16e8d74d MT |
6886 | #endif |
6887 | ||
f8c16bba | 6888 | return 0; |
56c6d28a | 6889 | |
013f6a5d MT |
6890 | out_free_percpu: |
6891 | free_percpu(shared_msrs); | |
56c6d28a | 6892 | out: |
56c6d28a | 6893 | return r; |
043405e1 | 6894 | } |
8776e519 | 6895 | |
f8c16bba ZX |
6896 | void kvm_arch_exit(void) |
6897 | { | |
0092e434 | 6898 | #ifdef CONFIG_X86_64 |
5fa4ec9c | 6899 | if (hypervisor_is_type(X86_HYPER_MS_HYPERV)) |
0092e434 VK |
6900 | clear_hv_tscchange_cb(); |
6901 | #endif | |
cef84c30 | 6902 | kvm_lapic_exit(); |
ff9d07a0 ZY |
6903 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
6904 | ||
888d256e JK |
6905 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
6906 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
6907 | CPUFREQ_TRANSITION_NOTIFIER); | |
251a5fd6 | 6908 | cpuhp_remove_state_nocalls(CPUHP_AP_X86_KVM_CLK_ONLINE); |
16e8d74d MT |
6909 | #ifdef CONFIG_X86_64 |
6910 | pvclock_gtod_unregister_notifier(&pvclock_gtod_notifier); | |
6911 | #endif | |
f8c16bba | 6912 | kvm_x86_ops = NULL; |
56c6d28a | 6913 | kvm_mmu_module_exit(); |
013f6a5d | 6914 | free_percpu(shared_msrs); |
56c6d28a | 6915 | } |
f8c16bba | 6916 | |
5cb56059 | 6917 | int kvm_vcpu_halt(struct kvm_vcpu *vcpu) |
8776e519 HB |
6918 | { |
6919 | ++vcpu->stat.halt_exits; | |
35754c98 | 6920 | if (lapic_in_kernel(vcpu)) { |
a4535290 | 6921 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
6922 | return 1; |
6923 | } else { | |
6924 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
6925 | return 0; | |
6926 | } | |
6927 | } | |
5cb56059 JS |
6928 | EXPORT_SYMBOL_GPL(kvm_vcpu_halt); |
6929 | ||
6930 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) | |
6931 | { | |
6affcbed KH |
6932 | int ret = kvm_skip_emulated_instruction(vcpu); |
6933 | /* | |
6934 | * TODO: we might be squashing a GUESTDBG_SINGLESTEP-triggered | |
6935 | * KVM_EXIT_DEBUG here. | |
6936 | */ | |
6937 | return kvm_vcpu_halt(vcpu) && ret; | |
5cb56059 | 6938 | } |
8776e519 HB |
6939 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); |
6940 | ||
8ef81a9a | 6941 | #ifdef CONFIG_X86_64 |
55dd00a7 MT |
6942 | static int kvm_pv_clock_pairing(struct kvm_vcpu *vcpu, gpa_t paddr, |
6943 | unsigned long clock_type) | |
6944 | { | |
6945 | struct kvm_clock_pairing clock_pairing; | |
899a31f5 | 6946 | struct timespec64 ts; |
80fbd89c | 6947 | u64 cycle; |
55dd00a7 MT |
6948 | int ret; |
6949 | ||
6950 | if (clock_type != KVM_CLOCK_PAIRING_WALLCLOCK) | |
6951 | return -KVM_EOPNOTSUPP; | |
6952 | ||
6953 | if (kvm_get_walltime_and_clockread(&ts, &cycle) == false) | |
6954 | return -KVM_EOPNOTSUPP; | |
6955 | ||
6956 | clock_pairing.sec = ts.tv_sec; | |
6957 | clock_pairing.nsec = ts.tv_nsec; | |
6958 | clock_pairing.tsc = kvm_read_l1_tsc(vcpu, cycle); | |
6959 | clock_pairing.flags = 0; | |
bcbfbd8e | 6960 | memset(&clock_pairing.pad, 0, sizeof(clock_pairing.pad)); |
55dd00a7 MT |
6961 | |
6962 | ret = 0; | |
6963 | if (kvm_write_guest(vcpu->kvm, paddr, &clock_pairing, | |
6964 | sizeof(struct kvm_clock_pairing))) | |
6965 | ret = -KVM_EFAULT; | |
6966 | ||
6967 | return ret; | |
6968 | } | |
8ef81a9a | 6969 | #endif |
55dd00a7 | 6970 | |
6aef266c SV |
6971 | /* |
6972 | * kvm_pv_kick_cpu_op: Kick a vcpu. | |
6973 | * | |
6974 | * @apicid - apicid of vcpu to be kicked. | |
6975 | */ | |
6976 | static void kvm_pv_kick_cpu_op(struct kvm *kvm, unsigned long flags, int apicid) | |
6977 | { | |
24d2166b | 6978 | struct kvm_lapic_irq lapic_irq; |
6aef266c | 6979 | |
24d2166b R |
6980 | lapic_irq.shorthand = 0; |
6981 | lapic_irq.dest_mode = 0; | |
ebd28fcb | 6982 | lapic_irq.level = 0; |
24d2166b | 6983 | lapic_irq.dest_id = apicid; |
93bbf0b8 | 6984 | lapic_irq.msi_redir_hint = false; |
6aef266c | 6985 | |
24d2166b | 6986 | lapic_irq.delivery_mode = APIC_DM_REMRD; |
795a149e | 6987 | kvm_irq_delivery_to_apic(kvm, NULL, &lapic_irq, NULL); |
6aef266c SV |
6988 | } |
6989 | ||
d62caabb AS |
6990 | void kvm_vcpu_deactivate_apicv(struct kvm_vcpu *vcpu) |
6991 | { | |
6992 | vcpu->arch.apicv_active = false; | |
6993 | kvm_x86_ops->refresh_apicv_exec_ctrl(vcpu); | |
6994 | } | |
6995 | ||
8776e519 HB |
6996 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
6997 | { | |
6998 | unsigned long nr, a0, a1, a2, a3, ret; | |
6356ee0c | 6999 | int op_64_bit; |
8776e519 | 7000 | |
696ca779 RK |
7001 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
7002 | return kvm_hv_hypercall(vcpu); | |
55cd8e5a | 7003 | |
5fdbf976 MT |
7004 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
7005 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
7006 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
7007 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
7008 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 7009 | |
229456fc | 7010 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 7011 | |
a449c7aa NA |
7012 | op_64_bit = is_64_bit_mode(vcpu); |
7013 | if (!op_64_bit) { | |
8776e519 HB |
7014 | nr &= 0xFFFFFFFF; |
7015 | a0 &= 0xFFFFFFFF; | |
7016 | a1 &= 0xFFFFFFFF; | |
7017 | a2 &= 0xFFFFFFFF; | |
7018 | a3 &= 0xFFFFFFFF; | |
7019 | } | |
7020 | ||
07708c4a JK |
7021 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
7022 | ret = -KVM_EPERM; | |
696ca779 | 7023 | goto out; |
07708c4a JK |
7024 | } |
7025 | ||
8776e519 | 7026 | switch (nr) { |
b93463aa AK |
7027 | case KVM_HC_VAPIC_POLL_IRQ: |
7028 | ret = 0; | |
7029 | break; | |
6aef266c SV |
7030 | case KVM_HC_KICK_CPU: |
7031 | kvm_pv_kick_cpu_op(vcpu->kvm, a0, a1); | |
7032 | ret = 0; | |
7033 | break; | |
8ef81a9a | 7034 | #ifdef CONFIG_X86_64 |
55dd00a7 MT |
7035 | case KVM_HC_CLOCK_PAIRING: |
7036 | ret = kvm_pv_clock_pairing(vcpu, a0, a1); | |
7037 | break; | |
4180bf1b WL |
7038 | case KVM_HC_SEND_IPI: |
7039 | ret = kvm_pv_send_ipi(vcpu->kvm, a0, a1, a2, a3, op_64_bit); | |
7040 | break; | |
8ef81a9a | 7041 | #endif |
8776e519 HB |
7042 | default: |
7043 | ret = -KVM_ENOSYS; | |
7044 | break; | |
7045 | } | |
696ca779 | 7046 | out: |
a449c7aa NA |
7047 | if (!op_64_bit) |
7048 | ret = (u32)ret; | |
5fdbf976 | 7049 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
6356ee0c | 7050 | |
f11c3a8d | 7051 | ++vcpu->stat.hypercalls; |
6356ee0c | 7052 | return kvm_skip_emulated_instruction(vcpu); |
8776e519 HB |
7053 | } |
7054 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
7055 | ||
b6785def | 7056 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) |
8776e519 | 7057 | { |
d6aa1000 | 7058 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
8776e519 | 7059 | char instruction[3]; |
5fdbf976 | 7060 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 7061 | |
8776e519 | 7062 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 7063 | |
ce2e852e DV |
7064 | return emulator_write_emulated(ctxt, rip, instruction, 3, |
7065 | &ctxt->exception); | |
8776e519 HB |
7066 | } |
7067 | ||
851ba692 | 7068 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 7069 | { |
782d422b MG |
7070 | return vcpu->run->request_interrupt_window && |
7071 | likely(!pic_in_kernel(vcpu->kvm)); | |
b6c7a5dc HB |
7072 | } |
7073 | ||
851ba692 | 7074 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 7075 | { |
851ba692 AK |
7076 | struct kvm_run *kvm_run = vcpu->run; |
7077 | ||
91586a3b | 7078 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
f077825a | 7079 | kvm_run->flags = is_smm(vcpu) ? KVM_RUN_X86_SMM : 0; |
2d3ad1f4 | 7080 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 7081 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
127a457a MG |
7082 | kvm_run->ready_for_interrupt_injection = |
7083 | pic_in_kernel(vcpu->kvm) || | |
782d422b | 7084 | kvm_vcpu_ready_for_interrupt_injection(vcpu); |
b6c7a5dc HB |
7085 | } |
7086 | ||
95ba8273 GN |
7087 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
7088 | { | |
7089 | int max_irr, tpr; | |
7090 | ||
7091 | if (!kvm_x86_ops->update_cr8_intercept) | |
7092 | return; | |
7093 | ||
bce87cce | 7094 | if (!lapic_in_kernel(vcpu)) |
88c808fd AK |
7095 | return; |
7096 | ||
d62caabb AS |
7097 | if (vcpu->arch.apicv_active) |
7098 | return; | |
7099 | ||
8db3baa2 GN |
7100 | if (!vcpu->arch.apic->vapic_addr) |
7101 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
7102 | else | |
7103 | max_irr = -1; | |
95ba8273 GN |
7104 | |
7105 | if (max_irr != -1) | |
7106 | max_irr >>= 4; | |
7107 | ||
7108 | tpr = kvm_lapic_get_cr8(vcpu); | |
7109 | ||
7110 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
7111 | } | |
7112 | ||
b6b8a145 | 7113 | static int inject_pending_event(struct kvm_vcpu *vcpu, bool req_int_win) |
95ba8273 | 7114 | { |
b6b8a145 JK |
7115 | int r; |
7116 | ||
95ba8273 | 7117 | /* try to reinject previous events if any */ |
664f8e26 | 7118 | |
1a680e35 LA |
7119 | if (vcpu->arch.exception.injected) |
7120 | kvm_x86_ops->queue_exception(vcpu); | |
664f8e26 | 7121 | /* |
a042c26f LA |
7122 | * Do not inject an NMI or interrupt if there is a pending |
7123 | * exception. Exceptions and interrupts are recognized at | |
7124 | * instruction boundaries, i.e. the start of an instruction. | |
7125 | * Trap-like exceptions, e.g. #DB, have higher priority than | |
7126 | * NMIs and interrupts, i.e. traps are recognized before an | |
7127 | * NMI/interrupt that's pending on the same instruction. | |
7128 | * Fault-like exceptions, e.g. #GP and #PF, are the lowest | |
7129 | * priority, but are only generated (pended) during instruction | |
7130 | * execution, i.e. a pending fault-like exception means the | |
7131 | * fault occurred on the *previous* instruction and must be | |
7132 | * serviced prior to recognizing any new events in order to | |
7133 | * fully complete the previous instruction. | |
664f8e26 | 7134 | */ |
1a680e35 LA |
7135 | else if (!vcpu->arch.exception.pending) { |
7136 | if (vcpu->arch.nmi_injected) | |
664f8e26 | 7137 | kvm_x86_ops->set_nmi(vcpu); |
1a680e35 | 7138 | else if (vcpu->arch.interrupt.injected) |
664f8e26 | 7139 | kvm_x86_ops->set_irq(vcpu); |
664f8e26 WL |
7140 | } |
7141 | ||
1a680e35 LA |
7142 | /* |
7143 | * Call check_nested_events() even if we reinjected a previous event | |
7144 | * in order for caller to determine if it should require immediate-exit | |
7145 | * from L2 to L1 due to pending L1 events which require exit | |
7146 | * from L2 to L1. | |
7147 | */ | |
664f8e26 WL |
7148 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { |
7149 | r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); | |
7150 | if (r != 0) | |
7151 | return r; | |
7152 | } | |
7153 | ||
7154 | /* try to inject new event if pending */ | |
b59bb7bd | 7155 | if (vcpu->arch.exception.pending) { |
5c1c85d0 AK |
7156 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
7157 | vcpu->arch.exception.has_error_code, | |
7158 | vcpu->arch.exception.error_code); | |
d6e8c854 | 7159 | |
1a680e35 | 7160 | WARN_ON_ONCE(vcpu->arch.exception.injected); |
664f8e26 WL |
7161 | vcpu->arch.exception.pending = false; |
7162 | vcpu->arch.exception.injected = true; | |
7163 | ||
d6e8c854 NA |
7164 | if (exception_type(vcpu->arch.exception.nr) == EXCPT_FAULT) |
7165 | __kvm_set_rflags(vcpu, kvm_get_rflags(vcpu) | | |
7166 | X86_EFLAGS_RF); | |
7167 | ||
f10c729f JM |
7168 | if (vcpu->arch.exception.nr == DB_VECTOR) { |
7169 | /* | |
7170 | * This code assumes that nSVM doesn't use | |
7171 | * check_nested_events(). If it does, the | |
7172 | * DR6/DR7 changes should happen before L1 | |
7173 | * gets a #VMEXIT for an intercepted #DB in | |
7174 | * L2. (Under VMX, on the other hand, the | |
7175 | * DR6/DR7 changes should not happen in the | |
7176 | * event of a VM-exit to L1 for an intercepted | |
7177 | * #DB in L2.) | |
7178 | */ | |
7179 | kvm_deliver_exception_payload(vcpu); | |
7180 | if (vcpu->arch.dr7 & DR7_GD) { | |
7181 | vcpu->arch.dr7 &= ~DR7_GD; | |
7182 | kvm_update_dr7(vcpu); | |
7183 | } | |
6bdf0662 NA |
7184 | } |
7185 | ||
cfcd20e5 | 7186 | kvm_x86_ops->queue_exception(vcpu); |
1a680e35 LA |
7187 | } |
7188 | ||
7189 | /* Don't consider new event if we re-injected an event */ | |
7190 | if (kvm_event_needs_reinjection(vcpu)) | |
7191 | return 0; | |
7192 | ||
7193 | if (vcpu->arch.smi_pending && !is_smm(vcpu) && | |
7194 | kvm_x86_ops->smi_allowed(vcpu)) { | |
c43203ca | 7195 | vcpu->arch.smi_pending = false; |
52797bf9 | 7196 | ++vcpu->arch.smi_count; |
ee2cd4b7 | 7197 | enter_smm(vcpu); |
c43203ca | 7198 | } else if (vcpu->arch.nmi_pending && kvm_x86_ops->nmi_allowed(vcpu)) { |
321c5658 YS |
7199 | --vcpu->arch.nmi_pending; |
7200 | vcpu->arch.nmi_injected = true; | |
7201 | kvm_x86_ops->set_nmi(vcpu); | |
c7c9c56c | 7202 | } else if (kvm_cpu_has_injectable_intr(vcpu)) { |
9242b5b6 BD |
7203 | /* |
7204 | * Because interrupts can be injected asynchronously, we are | |
7205 | * calling check_nested_events again here to avoid a race condition. | |
7206 | * See https://lkml.org/lkml/2014/7/2/60 for discussion about this | |
7207 | * proposal and current concerns. Perhaps we should be setting | |
7208 | * KVM_REQ_EVENT only on certain events and not unconditionally? | |
7209 | */ | |
7210 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { | |
7211 | r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); | |
7212 | if (r != 0) | |
7213 | return r; | |
7214 | } | |
95ba8273 | 7215 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { |
66fd3f7f GN |
7216 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
7217 | false); | |
7218 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
7219 | } |
7220 | } | |
ee2cd4b7 | 7221 | |
b6b8a145 | 7222 | return 0; |
95ba8273 GN |
7223 | } |
7224 | ||
7460fb4a AK |
7225 | static void process_nmi(struct kvm_vcpu *vcpu) |
7226 | { | |
7227 | unsigned limit = 2; | |
7228 | ||
7229 | /* | |
7230 | * x86 is limited to one NMI running, and one NMI pending after it. | |
7231 | * If an NMI is already in progress, limit further NMIs to just one. | |
7232 | * Otherwise, allow two (and we'll inject the first one immediately). | |
7233 | */ | |
7234 | if (kvm_x86_ops->get_nmi_mask(vcpu) || vcpu->arch.nmi_injected) | |
7235 | limit = 1; | |
7236 | ||
7237 | vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0); | |
7238 | vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit); | |
7239 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
7240 | } | |
7241 | ||
ee2cd4b7 | 7242 | static u32 enter_smm_get_segment_flags(struct kvm_segment *seg) |
660a5d51 PB |
7243 | { |
7244 | u32 flags = 0; | |
7245 | flags |= seg->g << 23; | |
7246 | flags |= seg->db << 22; | |
7247 | flags |= seg->l << 21; | |
7248 | flags |= seg->avl << 20; | |
7249 | flags |= seg->present << 15; | |
7250 | flags |= seg->dpl << 13; | |
7251 | flags |= seg->s << 12; | |
7252 | flags |= seg->type << 8; | |
7253 | return flags; | |
7254 | } | |
7255 | ||
ee2cd4b7 | 7256 | static void enter_smm_save_seg_32(struct kvm_vcpu *vcpu, char *buf, int n) |
660a5d51 PB |
7257 | { |
7258 | struct kvm_segment seg; | |
7259 | int offset; | |
7260 | ||
7261 | kvm_get_segment(vcpu, &seg, n); | |
7262 | put_smstate(u32, buf, 0x7fa8 + n * 4, seg.selector); | |
7263 | ||
7264 | if (n < 3) | |
7265 | offset = 0x7f84 + n * 12; | |
7266 | else | |
7267 | offset = 0x7f2c + (n - 3) * 12; | |
7268 | ||
7269 | put_smstate(u32, buf, offset + 8, seg.base); | |
7270 | put_smstate(u32, buf, offset + 4, seg.limit); | |
ee2cd4b7 | 7271 | put_smstate(u32, buf, offset, enter_smm_get_segment_flags(&seg)); |
660a5d51 PB |
7272 | } |
7273 | ||
efbb288a | 7274 | #ifdef CONFIG_X86_64 |
ee2cd4b7 | 7275 | static void enter_smm_save_seg_64(struct kvm_vcpu *vcpu, char *buf, int n) |
660a5d51 PB |
7276 | { |
7277 | struct kvm_segment seg; | |
7278 | int offset; | |
7279 | u16 flags; | |
7280 | ||
7281 | kvm_get_segment(vcpu, &seg, n); | |
7282 | offset = 0x7e00 + n * 16; | |
7283 | ||
ee2cd4b7 | 7284 | flags = enter_smm_get_segment_flags(&seg) >> 8; |
660a5d51 PB |
7285 | put_smstate(u16, buf, offset, seg.selector); |
7286 | put_smstate(u16, buf, offset + 2, flags); | |
7287 | put_smstate(u32, buf, offset + 4, seg.limit); | |
7288 | put_smstate(u64, buf, offset + 8, seg.base); | |
7289 | } | |
efbb288a | 7290 | #endif |
660a5d51 | 7291 | |
ee2cd4b7 | 7292 | static void enter_smm_save_state_32(struct kvm_vcpu *vcpu, char *buf) |
660a5d51 PB |
7293 | { |
7294 | struct desc_ptr dt; | |
7295 | struct kvm_segment seg; | |
7296 | unsigned long val; | |
7297 | int i; | |
7298 | ||
7299 | put_smstate(u32, buf, 0x7ffc, kvm_read_cr0(vcpu)); | |
7300 | put_smstate(u32, buf, 0x7ff8, kvm_read_cr3(vcpu)); | |
7301 | put_smstate(u32, buf, 0x7ff4, kvm_get_rflags(vcpu)); | |
7302 | put_smstate(u32, buf, 0x7ff0, kvm_rip_read(vcpu)); | |
7303 | ||
7304 | for (i = 0; i < 8; i++) | |
7305 | put_smstate(u32, buf, 0x7fd0 + i * 4, kvm_register_read(vcpu, i)); | |
7306 | ||
7307 | kvm_get_dr(vcpu, 6, &val); | |
7308 | put_smstate(u32, buf, 0x7fcc, (u32)val); | |
7309 | kvm_get_dr(vcpu, 7, &val); | |
7310 | put_smstate(u32, buf, 0x7fc8, (u32)val); | |
7311 | ||
7312 | kvm_get_segment(vcpu, &seg, VCPU_SREG_TR); | |
7313 | put_smstate(u32, buf, 0x7fc4, seg.selector); | |
7314 | put_smstate(u32, buf, 0x7f64, seg.base); | |
7315 | put_smstate(u32, buf, 0x7f60, seg.limit); | |
ee2cd4b7 | 7316 | put_smstate(u32, buf, 0x7f5c, enter_smm_get_segment_flags(&seg)); |
660a5d51 PB |
7317 | |
7318 | kvm_get_segment(vcpu, &seg, VCPU_SREG_LDTR); | |
7319 | put_smstate(u32, buf, 0x7fc0, seg.selector); | |
7320 | put_smstate(u32, buf, 0x7f80, seg.base); | |
7321 | put_smstate(u32, buf, 0x7f7c, seg.limit); | |
ee2cd4b7 | 7322 | put_smstate(u32, buf, 0x7f78, enter_smm_get_segment_flags(&seg)); |
660a5d51 PB |
7323 | |
7324 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
7325 | put_smstate(u32, buf, 0x7f74, dt.address); | |
7326 | put_smstate(u32, buf, 0x7f70, dt.size); | |
7327 | ||
7328 | kvm_x86_ops->get_idt(vcpu, &dt); | |
7329 | put_smstate(u32, buf, 0x7f58, dt.address); | |
7330 | put_smstate(u32, buf, 0x7f54, dt.size); | |
7331 | ||
7332 | for (i = 0; i < 6; i++) | |
ee2cd4b7 | 7333 | enter_smm_save_seg_32(vcpu, buf, i); |
660a5d51 PB |
7334 | |
7335 | put_smstate(u32, buf, 0x7f14, kvm_read_cr4(vcpu)); | |
7336 | ||
7337 | /* revision id */ | |
7338 | put_smstate(u32, buf, 0x7efc, 0x00020000); | |
7339 | put_smstate(u32, buf, 0x7ef8, vcpu->arch.smbase); | |
7340 | } | |
7341 | ||
ee2cd4b7 | 7342 | static void enter_smm_save_state_64(struct kvm_vcpu *vcpu, char *buf) |
660a5d51 PB |
7343 | { |
7344 | #ifdef CONFIG_X86_64 | |
7345 | struct desc_ptr dt; | |
7346 | struct kvm_segment seg; | |
7347 | unsigned long val; | |
7348 | int i; | |
7349 | ||
7350 | for (i = 0; i < 16; i++) | |
7351 | put_smstate(u64, buf, 0x7ff8 - i * 8, kvm_register_read(vcpu, i)); | |
7352 | ||
7353 | put_smstate(u64, buf, 0x7f78, kvm_rip_read(vcpu)); | |
7354 | put_smstate(u32, buf, 0x7f70, kvm_get_rflags(vcpu)); | |
7355 | ||
7356 | kvm_get_dr(vcpu, 6, &val); | |
7357 | put_smstate(u64, buf, 0x7f68, val); | |
7358 | kvm_get_dr(vcpu, 7, &val); | |
7359 | put_smstate(u64, buf, 0x7f60, val); | |
7360 | ||
7361 | put_smstate(u64, buf, 0x7f58, kvm_read_cr0(vcpu)); | |
7362 | put_smstate(u64, buf, 0x7f50, kvm_read_cr3(vcpu)); | |
7363 | put_smstate(u64, buf, 0x7f48, kvm_read_cr4(vcpu)); | |
7364 | ||
7365 | put_smstate(u32, buf, 0x7f00, vcpu->arch.smbase); | |
7366 | ||
7367 | /* revision id */ | |
7368 | put_smstate(u32, buf, 0x7efc, 0x00020064); | |
7369 | ||
7370 | put_smstate(u64, buf, 0x7ed0, vcpu->arch.efer); | |
7371 | ||
7372 | kvm_get_segment(vcpu, &seg, VCPU_SREG_TR); | |
7373 | put_smstate(u16, buf, 0x7e90, seg.selector); | |
ee2cd4b7 | 7374 | put_smstate(u16, buf, 0x7e92, enter_smm_get_segment_flags(&seg) >> 8); |
660a5d51 PB |
7375 | put_smstate(u32, buf, 0x7e94, seg.limit); |
7376 | put_smstate(u64, buf, 0x7e98, seg.base); | |
7377 | ||
7378 | kvm_x86_ops->get_idt(vcpu, &dt); | |
7379 | put_smstate(u32, buf, 0x7e84, dt.size); | |
7380 | put_smstate(u64, buf, 0x7e88, dt.address); | |
7381 | ||
7382 | kvm_get_segment(vcpu, &seg, VCPU_SREG_LDTR); | |
7383 | put_smstate(u16, buf, 0x7e70, seg.selector); | |
ee2cd4b7 | 7384 | put_smstate(u16, buf, 0x7e72, enter_smm_get_segment_flags(&seg) >> 8); |
660a5d51 PB |
7385 | put_smstate(u32, buf, 0x7e74, seg.limit); |
7386 | put_smstate(u64, buf, 0x7e78, seg.base); | |
7387 | ||
7388 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
7389 | put_smstate(u32, buf, 0x7e64, dt.size); | |
7390 | put_smstate(u64, buf, 0x7e68, dt.address); | |
7391 | ||
7392 | for (i = 0; i < 6; i++) | |
ee2cd4b7 | 7393 | enter_smm_save_seg_64(vcpu, buf, i); |
660a5d51 PB |
7394 | #else |
7395 | WARN_ON_ONCE(1); | |
7396 | #endif | |
7397 | } | |
7398 | ||
ee2cd4b7 | 7399 | static void enter_smm(struct kvm_vcpu *vcpu) |
64d60670 | 7400 | { |
660a5d51 | 7401 | struct kvm_segment cs, ds; |
18c3626e | 7402 | struct desc_ptr dt; |
660a5d51 PB |
7403 | char buf[512]; |
7404 | u32 cr0; | |
7405 | ||
660a5d51 | 7406 | trace_kvm_enter_smm(vcpu->vcpu_id, vcpu->arch.smbase, true); |
660a5d51 | 7407 | memset(buf, 0, 512); |
d6321d49 | 7408 | if (guest_cpuid_has(vcpu, X86_FEATURE_LM)) |
ee2cd4b7 | 7409 | enter_smm_save_state_64(vcpu, buf); |
660a5d51 | 7410 | else |
ee2cd4b7 | 7411 | enter_smm_save_state_32(vcpu, buf); |
660a5d51 | 7412 | |
0234bf88 LP |
7413 | /* |
7414 | * Give pre_enter_smm() a chance to make ISA-specific changes to the | |
7415 | * vCPU state (e.g. leave guest mode) after we've saved the state into | |
7416 | * the SMM state-save area. | |
7417 | */ | |
7418 | kvm_x86_ops->pre_enter_smm(vcpu, buf); | |
7419 | ||
7420 | vcpu->arch.hflags |= HF_SMM_MASK; | |
54bf36aa | 7421 | kvm_vcpu_write_guest(vcpu, vcpu->arch.smbase + 0xfe00, buf, sizeof(buf)); |
660a5d51 PB |
7422 | |
7423 | if (kvm_x86_ops->get_nmi_mask(vcpu)) | |
7424 | vcpu->arch.hflags |= HF_SMM_INSIDE_NMI_MASK; | |
7425 | else | |
7426 | kvm_x86_ops->set_nmi_mask(vcpu, true); | |
7427 | ||
7428 | kvm_set_rflags(vcpu, X86_EFLAGS_FIXED); | |
7429 | kvm_rip_write(vcpu, 0x8000); | |
7430 | ||
7431 | cr0 = vcpu->arch.cr0 & ~(X86_CR0_PE | X86_CR0_EM | X86_CR0_TS | X86_CR0_PG); | |
7432 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
7433 | vcpu->arch.cr0 = cr0; | |
7434 | ||
7435 | kvm_x86_ops->set_cr4(vcpu, 0); | |
7436 | ||
18c3626e PB |
7437 | /* Undocumented: IDT limit is set to zero on entry to SMM. */ |
7438 | dt.address = dt.size = 0; | |
7439 | kvm_x86_ops->set_idt(vcpu, &dt); | |
7440 | ||
660a5d51 PB |
7441 | __kvm_set_dr(vcpu, 7, DR7_FIXED_1); |
7442 | ||
7443 | cs.selector = (vcpu->arch.smbase >> 4) & 0xffff; | |
7444 | cs.base = vcpu->arch.smbase; | |
7445 | ||
7446 | ds.selector = 0; | |
7447 | ds.base = 0; | |
7448 | ||
7449 | cs.limit = ds.limit = 0xffffffff; | |
7450 | cs.type = ds.type = 0x3; | |
7451 | cs.dpl = ds.dpl = 0; | |
7452 | cs.db = ds.db = 0; | |
7453 | cs.s = ds.s = 1; | |
7454 | cs.l = ds.l = 0; | |
7455 | cs.g = ds.g = 1; | |
7456 | cs.avl = ds.avl = 0; | |
7457 | cs.present = ds.present = 1; | |
7458 | cs.unusable = ds.unusable = 0; | |
7459 | cs.padding = ds.padding = 0; | |
7460 | ||
7461 | kvm_set_segment(vcpu, &cs, VCPU_SREG_CS); | |
7462 | kvm_set_segment(vcpu, &ds, VCPU_SREG_DS); | |
7463 | kvm_set_segment(vcpu, &ds, VCPU_SREG_ES); | |
7464 | kvm_set_segment(vcpu, &ds, VCPU_SREG_FS); | |
7465 | kvm_set_segment(vcpu, &ds, VCPU_SREG_GS); | |
7466 | kvm_set_segment(vcpu, &ds, VCPU_SREG_SS); | |
7467 | ||
d6321d49 | 7468 | if (guest_cpuid_has(vcpu, X86_FEATURE_LM)) |
660a5d51 PB |
7469 | kvm_x86_ops->set_efer(vcpu, 0); |
7470 | ||
7471 | kvm_update_cpuid(vcpu); | |
7472 | kvm_mmu_reset_context(vcpu); | |
64d60670 PB |
7473 | } |
7474 | ||
ee2cd4b7 | 7475 | static void process_smi(struct kvm_vcpu *vcpu) |
c43203ca PB |
7476 | { |
7477 | vcpu->arch.smi_pending = true; | |
7478 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
7479 | } | |
7480 | ||
2860c4b1 PB |
7481 | void kvm_make_scan_ioapic_request(struct kvm *kvm) |
7482 | { | |
7483 | kvm_make_all_cpus_request(kvm, KVM_REQ_SCAN_IOAPIC); | |
7484 | } | |
7485 | ||
3d81bc7e | 7486 | static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu) |
c7c9c56c | 7487 | { |
3d81bc7e YZ |
7488 | if (!kvm_apic_hw_enabled(vcpu->arch.apic)) |
7489 | return; | |
c7c9c56c | 7490 | |
6308630b | 7491 | bitmap_zero(vcpu->arch.ioapic_handled_vectors, 256); |
c7c9c56c | 7492 | |
b053b2ae | 7493 | if (irqchip_split(vcpu->kvm)) |
6308630b | 7494 | kvm_scan_ioapic_routes(vcpu, vcpu->arch.ioapic_handled_vectors); |
db2bdcbb | 7495 | else { |
fa59cc00 | 7496 | if (vcpu->arch.apicv_active) |
d62caabb | 7497 | kvm_x86_ops->sync_pir_to_irr(vcpu); |
e97f852f WL |
7498 | if (ioapic_in_kernel(vcpu->kvm)) |
7499 | kvm_ioapic_scan_entry(vcpu, vcpu->arch.ioapic_handled_vectors); | |
db2bdcbb | 7500 | } |
e40ff1d6 LA |
7501 | |
7502 | if (is_guest_mode(vcpu)) | |
7503 | vcpu->arch.load_eoi_exitmap_pending = true; | |
7504 | else | |
7505 | kvm_make_request(KVM_REQ_LOAD_EOI_EXITMAP, vcpu); | |
7506 | } | |
7507 | ||
7508 | static void vcpu_load_eoi_exitmap(struct kvm_vcpu *vcpu) | |
7509 | { | |
7510 | u64 eoi_exit_bitmap[4]; | |
7511 | ||
7512 | if (!kvm_apic_hw_enabled(vcpu->arch.apic)) | |
7513 | return; | |
7514 | ||
5c919412 AS |
7515 | bitmap_or((ulong *)eoi_exit_bitmap, vcpu->arch.ioapic_handled_vectors, |
7516 | vcpu_to_synic(vcpu)->vec_bitmap, 256); | |
7517 | kvm_x86_ops->load_eoi_exitmap(vcpu, eoi_exit_bitmap); | |
c7c9c56c YZ |
7518 | } |
7519 | ||
93065ac7 MH |
7520 | int kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm, |
7521 | unsigned long start, unsigned long end, | |
7522 | bool blockable) | |
b1394e74 RK |
7523 | { |
7524 | unsigned long apic_address; | |
7525 | ||
7526 | /* | |
7527 | * The physical address of apic access page is stored in the VMCS. | |
7528 | * Update it when it becomes invalid. | |
7529 | */ | |
7530 | apic_address = gfn_to_hva(kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT); | |
7531 | if (start <= apic_address && apic_address < end) | |
7532 | kvm_make_all_cpus_request(kvm, KVM_REQ_APIC_PAGE_RELOAD); | |
93065ac7 MH |
7533 | |
7534 | return 0; | |
b1394e74 RK |
7535 | } |
7536 | ||
4256f43f TC |
7537 | void kvm_vcpu_reload_apic_access_page(struct kvm_vcpu *vcpu) |
7538 | { | |
c24ae0dc TC |
7539 | struct page *page = NULL; |
7540 | ||
35754c98 | 7541 | if (!lapic_in_kernel(vcpu)) |
f439ed27 PB |
7542 | return; |
7543 | ||
4256f43f TC |
7544 | if (!kvm_x86_ops->set_apic_access_page_addr) |
7545 | return; | |
7546 | ||
c24ae0dc | 7547 | page = gfn_to_page(vcpu->kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT); |
e8fd5e9e AA |
7548 | if (is_error_page(page)) |
7549 | return; | |
c24ae0dc TC |
7550 | kvm_x86_ops->set_apic_access_page_addr(vcpu, page_to_phys(page)); |
7551 | ||
7552 | /* | |
7553 | * Do not pin apic access page in memory, the MMU notifier | |
7554 | * will call us again if it is migrated or swapped out. | |
7555 | */ | |
7556 | put_page(page); | |
4256f43f TC |
7557 | } |
7558 | EXPORT_SYMBOL_GPL(kvm_vcpu_reload_apic_access_page); | |
7559 | ||
d264ee0c SC |
7560 | void __kvm_request_immediate_exit(struct kvm_vcpu *vcpu) |
7561 | { | |
7562 | smp_send_reschedule(vcpu->cpu); | |
7563 | } | |
7564 | EXPORT_SYMBOL_GPL(__kvm_request_immediate_exit); | |
7565 | ||
9357d939 | 7566 | /* |
362c698f | 7567 | * Returns 1 to let vcpu_run() continue the guest execution loop without |
9357d939 TY |
7568 | * exiting to the userspace. Otherwise, the value will be returned to the |
7569 | * userspace. | |
7570 | */ | |
851ba692 | 7571 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
7572 | { |
7573 | int r; | |
62a193ed MG |
7574 | bool req_int_win = |
7575 | dm_request_for_irq_injection(vcpu) && | |
7576 | kvm_cpu_accept_dm_intr(vcpu); | |
7577 | ||
730dca42 | 7578 | bool req_immediate_exit = false; |
b6c7a5dc | 7579 | |
2fa6e1e1 | 7580 | if (kvm_request_pending(vcpu)) { |
7f7f1ba3 PB |
7581 | if (kvm_check_request(KVM_REQ_GET_VMCS12_PAGES, vcpu)) |
7582 | kvm_x86_ops->get_vmcs12_pages(vcpu); | |
a8eeb04a | 7583 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) |
2e53d63a | 7584 | kvm_mmu_unload(vcpu); |
a8eeb04a | 7585 | if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu)) |
2f599714 | 7586 | __kvm_migrate_timers(vcpu); |
d828199e MT |
7587 | if (kvm_check_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu)) |
7588 | kvm_gen_update_masterclock(vcpu->kvm); | |
0061d53d MT |
7589 | if (kvm_check_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu)) |
7590 | kvm_gen_kvmclock_update(vcpu); | |
34c238a1 ZA |
7591 | if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) { |
7592 | r = kvm_guest_time_update(vcpu); | |
8cfdc000 ZA |
7593 | if (unlikely(r)) |
7594 | goto out; | |
7595 | } | |
a8eeb04a | 7596 | if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu)) |
4731d4c7 | 7597 | kvm_mmu_sync_roots(vcpu); |
6e42782f JS |
7598 | if (kvm_check_request(KVM_REQ_LOAD_CR3, vcpu)) |
7599 | kvm_mmu_load_cr3(vcpu); | |
a8eeb04a | 7600 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) |
c2ba05cc | 7601 | kvm_vcpu_flush_tlb(vcpu, true); |
a8eeb04a | 7602 | if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) { |
851ba692 | 7603 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
7604 | r = 0; |
7605 | goto out; | |
7606 | } | |
a8eeb04a | 7607 | if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) { |
851ba692 | 7608 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
bbeac283 | 7609 | vcpu->mmio_needed = 0; |
71c4dfaf JR |
7610 | r = 0; |
7611 | goto out; | |
7612 | } | |
af585b92 GN |
7613 | if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) { |
7614 | /* Page is swapped out. Do synthetic halt */ | |
7615 | vcpu->arch.apf.halted = true; | |
7616 | r = 1; | |
7617 | goto out; | |
7618 | } | |
c9aaa895 GC |
7619 | if (kvm_check_request(KVM_REQ_STEAL_UPDATE, vcpu)) |
7620 | record_steal_time(vcpu); | |
64d60670 PB |
7621 | if (kvm_check_request(KVM_REQ_SMI, vcpu)) |
7622 | process_smi(vcpu); | |
7460fb4a AK |
7623 | if (kvm_check_request(KVM_REQ_NMI, vcpu)) |
7624 | process_nmi(vcpu); | |
f5132b01 | 7625 | if (kvm_check_request(KVM_REQ_PMU, vcpu)) |
c6702c9d | 7626 | kvm_pmu_handle_event(vcpu); |
f5132b01 | 7627 | if (kvm_check_request(KVM_REQ_PMI, vcpu)) |
c6702c9d | 7628 | kvm_pmu_deliver_pmi(vcpu); |
7543a635 SR |
7629 | if (kvm_check_request(KVM_REQ_IOAPIC_EOI_EXIT, vcpu)) { |
7630 | BUG_ON(vcpu->arch.pending_ioapic_eoi > 255); | |
7631 | if (test_bit(vcpu->arch.pending_ioapic_eoi, | |
6308630b | 7632 | vcpu->arch.ioapic_handled_vectors)) { |
7543a635 SR |
7633 | vcpu->run->exit_reason = KVM_EXIT_IOAPIC_EOI; |
7634 | vcpu->run->eoi.vector = | |
7635 | vcpu->arch.pending_ioapic_eoi; | |
7636 | r = 0; | |
7637 | goto out; | |
7638 | } | |
7639 | } | |
3d81bc7e YZ |
7640 | if (kvm_check_request(KVM_REQ_SCAN_IOAPIC, vcpu)) |
7641 | vcpu_scan_ioapic(vcpu); | |
e40ff1d6 LA |
7642 | if (kvm_check_request(KVM_REQ_LOAD_EOI_EXITMAP, vcpu)) |
7643 | vcpu_load_eoi_exitmap(vcpu); | |
4256f43f TC |
7644 | if (kvm_check_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu)) |
7645 | kvm_vcpu_reload_apic_access_page(vcpu); | |
2ce79189 AS |
7646 | if (kvm_check_request(KVM_REQ_HV_CRASH, vcpu)) { |
7647 | vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; | |
7648 | vcpu->run->system_event.type = KVM_SYSTEM_EVENT_CRASH; | |
7649 | r = 0; | |
7650 | goto out; | |
7651 | } | |
e516cebb AS |
7652 | if (kvm_check_request(KVM_REQ_HV_RESET, vcpu)) { |
7653 | vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; | |
7654 | vcpu->run->system_event.type = KVM_SYSTEM_EVENT_RESET; | |
7655 | r = 0; | |
7656 | goto out; | |
7657 | } | |
db397571 AS |
7658 | if (kvm_check_request(KVM_REQ_HV_EXIT, vcpu)) { |
7659 | vcpu->run->exit_reason = KVM_EXIT_HYPERV; | |
7660 | vcpu->run->hyperv = vcpu->arch.hyperv.exit; | |
7661 | r = 0; | |
7662 | goto out; | |
7663 | } | |
f3b138c5 AS |
7664 | |
7665 | /* | |
7666 | * KVM_REQ_HV_STIMER has to be processed after | |
7667 | * KVM_REQ_CLOCK_UPDATE, because Hyper-V SynIC timers | |
7668 | * depend on the guest clock being up-to-date | |
7669 | */ | |
1f4b34f8 AS |
7670 | if (kvm_check_request(KVM_REQ_HV_STIMER, vcpu)) |
7671 | kvm_hv_process_stimers(vcpu); | |
2f52d58c | 7672 | } |
b93463aa | 7673 | |
b463a6f7 | 7674 | if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { |
0f1e261e | 7675 | ++vcpu->stat.req_event; |
66450a21 JK |
7676 | kvm_apic_accept_events(vcpu); |
7677 | if (vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { | |
7678 | r = 1; | |
7679 | goto out; | |
7680 | } | |
7681 | ||
b6b8a145 JK |
7682 | if (inject_pending_event(vcpu, req_int_win) != 0) |
7683 | req_immediate_exit = true; | |
321c5658 | 7684 | else { |
cc3d967f | 7685 | /* Enable SMI/NMI/IRQ window open exits if needed. |
c43203ca | 7686 | * |
cc3d967f LP |
7687 | * SMIs have three cases: |
7688 | * 1) They can be nested, and then there is nothing to | |
7689 | * do here because RSM will cause a vmexit anyway. | |
7690 | * 2) There is an ISA-specific reason why SMI cannot be | |
7691 | * injected, and the moment when this changes can be | |
7692 | * intercepted. | |
7693 | * 3) Or the SMI can be pending because | |
7694 | * inject_pending_event has completed the injection | |
7695 | * of an IRQ or NMI from the previous vmexit, and | |
7696 | * then we request an immediate exit to inject the | |
7697 | * SMI. | |
c43203ca PB |
7698 | */ |
7699 | if (vcpu->arch.smi_pending && !is_smm(vcpu)) | |
cc3d967f LP |
7700 | if (!kvm_x86_ops->enable_smi_window(vcpu)) |
7701 | req_immediate_exit = true; | |
321c5658 YS |
7702 | if (vcpu->arch.nmi_pending) |
7703 | kvm_x86_ops->enable_nmi_window(vcpu); | |
7704 | if (kvm_cpu_has_injectable_intr(vcpu) || req_int_win) | |
7705 | kvm_x86_ops->enable_irq_window(vcpu); | |
664f8e26 | 7706 | WARN_ON(vcpu->arch.exception.pending); |
321c5658 | 7707 | } |
b463a6f7 AK |
7708 | |
7709 | if (kvm_lapic_enabled(vcpu)) { | |
7710 | update_cr8_intercept(vcpu); | |
7711 | kvm_lapic_sync_to_vapic(vcpu); | |
7712 | } | |
7713 | } | |
7714 | ||
d8368af8 AK |
7715 | r = kvm_mmu_reload(vcpu); |
7716 | if (unlikely(r)) { | |
d905c069 | 7717 | goto cancel_injection; |
d8368af8 AK |
7718 | } |
7719 | ||
b6c7a5dc HB |
7720 | preempt_disable(); |
7721 | ||
7722 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
b95234c8 PB |
7723 | |
7724 | /* | |
7725 | * Disable IRQs before setting IN_GUEST_MODE. Posted interrupt | |
7726 | * IPI are then delayed after guest entry, which ensures that they | |
7727 | * result in virtual interrupt delivery. | |
7728 | */ | |
7729 | local_irq_disable(); | |
6b7e2d09 XG |
7730 | vcpu->mode = IN_GUEST_MODE; |
7731 | ||
01b71917 MT |
7732 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
7733 | ||
0f127d12 | 7734 | /* |
b95234c8 | 7735 | * 1) We should set ->mode before checking ->requests. Please see |
cde9af6e | 7736 | * the comment in kvm_vcpu_exiting_guest_mode(). |
b95234c8 PB |
7737 | * |
7738 | * 2) For APICv, we should set ->mode before checking PIR.ON. This | |
7739 | * pairs with the memory barrier implicit in pi_test_and_set_on | |
7740 | * (see vmx_deliver_posted_interrupt). | |
7741 | * | |
7742 | * 3) This also orders the write to mode from any reads to the page | |
7743 | * tables done while the VCPU is running. Please see the comment | |
7744 | * in kvm_flush_remote_tlbs. | |
6b7e2d09 | 7745 | */ |
01b71917 | 7746 | smp_mb__after_srcu_read_unlock(); |
b6c7a5dc | 7747 | |
b95234c8 PB |
7748 | /* |
7749 | * This handles the case where a posted interrupt was | |
7750 | * notified with kvm_vcpu_kick. | |
7751 | */ | |
fa59cc00 LA |
7752 | if (kvm_lapic_enabled(vcpu) && vcpu->arch.apicv_active) |
7753 | kvm_x86_ops->sync_pir_to_irr(vcpu); | |
32f88400 | 7754 | |
2fa6e1e1 | 7755 | if (vcpu->mode == EXITING_GUEST_MODE || kvm_request_pending(vcpu) |
d94e1dc9 | 7756 | || need_resched() || signal_pending(current)) { |
6b7e2d09 | 7757 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 7758 | smp_wmb(); |
6c142801 AK |
7759 | local_irq_enable(); |
7760 | preempt_enable(); | |
01b71917 | 7761 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
6c142801 | 7762 | r = 1; |
d905c069 | 7763 | goto cancel_injection; |
6c142801 AK |
7764 | } |
7765 | ||
fc5b7f3b DM |
7766 | kvm_load_guest_xcr0(vcpu); |
7767 | ||
c43203ca PB |
7768 | if (req_immediate_exit) { |
7769 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
d264ee0c | 7770 | kvm_x86_ops->request_immediate_exit(vcpu); |
c43203ca | 7771 | } |
d6185f20 | 7772 | |
8b89fe1f | 7773 | trace_kvm_entry(vcpu->vcpu_id); |
9c48d517 WL |
7774 | if (lapic_timer_advance_ns) |
7775 | wait_lapic_expire(vcpu); | |
6edaa530 | 7776 | guest_enter_irqoff(); |
b6c7a5dc | 7777 | |
42dbaa5a | 7778 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
7779 | set_debugreg(0, 7); |
7780 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
7781 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
7782 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
7783 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
c77fb5fe | 7784 | set_debugreg(vcpu->arch.dr6, 6); |
ae561ede | 7785 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD; |
42dbaa5a | 7786 | } |
b6c7a5dc | 7787 | |
851ba692 | 7788 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 7789 | |
c77fb5fe PB |
7790 | /* |
7791 | * Do this here before restoring debug registers on the host. And | |
7792 | * since we do this before handling the vmexit, a DR access vmexit | |
7793 | * can (a) read the correct value of the debug registers, (b) set | |
7794 | * KVM_DEBUGREG_WONT_EXIT again. | |
7795 | */ | |
7796 | if (unlikely(vcpu->arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT)) { | |
c77fb5fe PB |
7797 | WARN_ON(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP); |
7798 | kvm_x86_ops->sync_dirty_debug_regs(vcpu); | |
70e4da7a PB |
7799 | kvm_update_dr0123(vcpu); |
7800 | kvm_update_dr6(vcpu); | |
7801 | kvm_update_dr7(vcpu); | |
7802 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD; | |
c77fb5fe PB |
7803 | } |
7804 | ||
24f1e32c FW |
7805 | /* |
7806 | * If the guest has used debug registers, at least dr7 | |
7807 | * will be disabled while returning to the host. | |
7808 | * If we don't have active breakpoints in the host, we don't | |
7809 | * care about the messed up debug address registers. But if | |
7810 | * we have some of them active, restore the old state. | |
7811 | */ | |
59d8eb53 | 7812 | if (hw_breakpoint_active()) |
24f1e32c | 7813 | hw_breakpoint_restore(); |
42dbaa5a | 7814 | |
4ba76538 | 7815 | vcpu->arch.last_guest_tsc = kvm_read_l1_tsc(vcpu, rdtsc()); |
1d5f066e | 7816 | |
6b7e2d09 | 7817 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 7818 | smp_wmb(); |
a547c6db | 7819 | |
fc5b7f3b DM |
7820 | kvm_put_guest_xcr0(vcpu); |
7821 | ||
dd60d217 | 7822 | kvm_before_interrupt(vcpu); |
a547c6db | 7823 | kvm_x86_ops->handle_external_intr(vcpu); |
dd60d217 | 7824 | kvm_after_interrupt(vcpu); |
b6c7a5dc HB |
7825 | |
7826 | ++vcpu->stat.exits; | |
7827 | ||
f2485b3e | 7828 | guest_exit_irqoff(); |
b6c7a5dc | 7829 | |
f2485b3e | 7830 | local_irq_enable(); |
b6c7a5dc HB |
7831 | preempt_enable(); |
7832 | ||
f656ce01 | 7833 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 7834 | |
b6c7a5dc HB |
7835 | /* |
7836 | * Profile KVM exit RIPs: | |
7837 | */ | |
7838 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
7839 | unsigned long rip = kvm_rip_read(vcpu); |
7840 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
7841 | } |
7842 | ||
cc578287 ZA |
7843 | if (unlikely(vcpu->arch.tsc_always_catchup)) |
7844 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); | |
298101da | 7845 | |
5cfb1d5a MT |
7846 | if (vcpu->arch.apic_attention) |
7847 | kvm_lapic_sync_from_vapic(vcpu); | |
b93463aa | 7848 | |
618232e2 | 7849 | vcpu->arch.gpa_available = false; |
851ba692 | 7850 | r = kvm_x86_ops->handle_exit(vcpu); |
d905c069 MT |
7851 | return r; |
7852 | ||
7853 | cancel_injection: | |
7854 | kvm_x86_ops->cancel_injection(vcpu); | |
ae7a2a3f MT |
7855 | if (unlikely(vcpu->arch.apic_attention)) |
7856 | kvm_lapic_sync_from_vapic(vcpu); | |
d7690175 MT |
7857 | out: |
7858 | return r; | |
7859 | } | |
b6c7a5dc | 7860 | |
362c698f PB |
7861 | static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu) |
7862 | { | |
bf9f6ac8 FW |
7863 | if (!kvm_arch_vcpu_runnable(vcpu) && |
7864 | (!kvm_x86_ops->pre_block || kvm_x86_ops->pre_block(vcpu) == 0)) { | |
9c8fd1ba PB |
7865 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
7866 | kvm_vcpu_block(vcpu); | |
7867 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); | |
bf9f6ac8 FW |
7868 | |
7869 | if (kvm_x86_ops->post_block) | |
7870 | kvm_x86_ops->post_block(vcpu); | |
7871 | ||
9c8fd1ba PB |
7872 | if (!kvm_check_request(KVM_REQ_UNHALT, vcpu)) |
7873 | return 1; | |
7874 | } | |
362c698f PB |
7875 | |
7876 | kvm_apic_accept_events(vcpu); | |
7877 | switch(vcpu->arch.mp_state) { | |
7878 | case KVM_MP_STATE_HALTED: | |
7879 | vcpu->arch.pv.pv_unhalted = false; | |
7880 | vcpu->arch.mp_state = | |
7881 | KVM_MP_STATE_RUNNABLE; | |
7882 | case KVM_MP_STATE_RUNNABLE: | |
7883 | vcpu->arch.apf.halted = false; | |
7884 | break; | |
7885 | case KVM_MP_STATE_INIT_RECEIVED: | |
7886 | break; | |
7887 | default: | |
7888 | return -EINTR; | |
7889 | break; | |
7890 | } | |
7891 | return 1; | |
7892 | } | |
09cec754 | 7893 | |
5d9bc648 PB |
7894 | static inline bool kvm_vcpu_running(struct kvm_vcpu *vcpu) |
7895 | { | |
0ad3bed6 PB |
7896 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) |
7897 | kvm_x86_ops->check_nested_events(vcpu, false); | |
7898 | ||
5d9bc648 PB |
7899 | return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
7900 | !vcpu->arch.apf.halted); | |
7901 | } | |
7902 | ||
362c698f | 7903 | static int vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
7904 | { |
7905 | int r; | |
f656ce01 | 7906 | struct kvm *kvm = vcpu->kvm; |
d7690175 | 7907 | |
f656ce01 | 7908 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
c595ceee | 7909 | vcpu->arch.l1tf_flush_l1d = true; |
d7690175 | 7910 | |
362c698f | 7911 | for (;;) { |
58f800d5 | 7912 | if (kvm_vcpu_running(vcpu)) { |
851ba692 | 7913 | r = vcpu_enter_guest(vcpu); |
bf9f6ac8 | 7914 | } else { |
362c698f | 7915 | r = vcpu_block(kvm, vcpu); |
bf9f6ac8 FW |
7916 | } |
7917 | ||
09cec754 GN |
7918 | if (r <= 0) |
7919 | break; | |
7920 | ||
72875d8a | 7921 | kvm_clear_request(KVM_REQ_PENDING_TIMER, vcpu); |
09cec754 GN |
7922 | if (kvm_cpu_has_pending_timer(vcpu)) |
7923 | kvm_inject_pending_timer_irqs(vcpu); | |
7924 | ||
782d422b MG |
7925 | if (dm_request_for_irq_injection(vcpu) && |
7926 | kvm_vcpu_ready_for_interrupt_injection(vcpu)) { | |
4ca7dd8c PB |
7927 | r = 0; |
7928 | vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; | |
09cec754 | 7929 | ++vcpu->stat.request_irq_exits; |
362c698f | 7930 | break; |
09cec754 | 7931 | } |
af585b92 GN |
7932 | |
7933 | kvm_check_async_pf_completion(vcpu); | |
7934 | ||
09cec754 GN |
7935 | if (signal_pending(current)) { |
7936 | r = -EINTR; | |
851ba692 | 7937 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 | 7938 | ++vcpu->stat.signal_exits; |
362c698f | 7939 | break; |
09cec754 GN |
7940 | } |
7941 | if (need_resched()) { | |
f656ce01 | 7942 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
c08ac06a | 7943 | cond_resched(); |
f656ce01 | 7944 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 7945 | } |
b6c7a5dc HB |
7946 | } |
7947 | ||
f656ce01 | 7948 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc HB |
7949 | |
7950 | return r; | |
7951 | } | |
7952 | ||
716d51ab GN |
7953 | static inline int complete_emulated_io(struct kvm_vcpu *vcpu) |
7954 | { | |
7955 | int r; | |
7956 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
0ce97a2b | 7957 | r = kvm_emulate_instruction(vcpu, EMULTYPE_NO_DECODE); |
716d51ab GN |
7958 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
7959 | if (r != EMULATE_DONE) | |
7960 | return 0; | |
7961 | return 1; | |
7962 | } | |
7963 | ||
7964 | static int complete_emulated_pio(struct kvm_vcpu *vcpu) | |
7965 | { | |
7966 | BUG_ON(!vcpu->arch.pio.count); | |
7967 | ||
7968 | return complete_emulated_io(vcpu); | |
7969 | } | |
7970 | ||
f78146b0 AK |
7971 | /* |
7972 | * Implements the following, as a state machine: | |
7973 | * | |
7974 | * read: | |
7975 | * for each fragment | |
87da7e66 XG |
7976 | * for each mmio piece in the fragment |
7977 | * write gpa, len | |
7978 | * exit | |
7979 | * copy data | |
f78146b0 AK |
7980 | * execute insn |
7981 | * | |
7982 | * write: | |
7983 | * for each fragment | |
87da7e66 XG |
7984 | * for each mmio piece in the fragment |
7985 | * write gpa, len | |
7986 | * copy data | |
7987 | * exit | |
f78146b0 | 7988 | */ |
716d51ab | 7989 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu) |
5287f194 AK |
7990 | { |
7991 | struct kvm_run *run = vcpu->run; | |
f78146b0 | 7992 | struct kvm_mmio_fragment *frag; |
87da7e66 | 7993 | unsigned len; |
5287f194 | 7994 | |
716d51ab | 7995 | BUG_ON(!vcpu->mmio_needed); |
5287f194 | 7996 | |
716d51ab | 7997 | /* Complete previous fragment */ |
87da7e66 XG |
7998 | frag = &vcpu->mmio_fragments[vcpu->mmio_cur_fragment]; |
7999 | len = min(8u, frag->len); | |
716d51ab | 8000 | if (!vcpu->mmio_is_write) |
87da7e66 XG |
8001 | memcpy(frag->data, run->mmio.data, len); |
8002 | ||
8003 | if (frag->len <= 8) { | |
8004 | /* Switch to the next fragment. */ | |
8005 | frag++; | |
8006 | vcpu->mmio_cur_fragment++; | |
8007 | } else { | |
8008 | /* Go forward to the next mmio piece. */ | |
8009 | frag->data += len; | |
8010 | frag->gpa += len; | |
8011 | frag->len -= len; | |
8012 | } | |
8013 | ||
a08d3b3b | 8014 | if (vcpu->mmio_cur_fragment >= vcpu->mmio_nr_fragments) { |
716d51ab | 8015 | vcpu->mmio_needed = 0; |
0912c977 PB |
8016 | |
8017 | /* FIXME: return into emulator if single-stepping. */ | |
cef4dea0 | 8018 | if (vcpu->mmio_is_write) |
716d51ab GN |
8019 | return 1; |
8020 | vcpu->mmio_read_completed = 1; | |
8021 | return complete_emulated_io(vcpu); | |
8022 | } | |
87da7e66 | 8023 | |
716d51ab GN |
8024 | run->exit_reason = KVM_EXIT_MMIO; |
8025 | run->mmio.phys_addr = frag->gpa; | |
8026 | if (vcpu->mmio_is_write) | |
87da7e66 XG |
8027 | memcpy(run->mmio.data, frag->data, min(8u, frag->len)); |
8028 | run->mmio.len = min(8u, frag->len); | |
716d51ab GN |
8029 | run->mmio.is_write = vcpu->mmio_is_write; |
8030 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; | |
8031 | return 0; | |
5287f194 AK |
8032 | } |
8033 | ||
822f312d SAS |
8034 | /* Swap (qemu) user FPU context for the guest FPU context. */ |
8035 | static void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) | |
8036 | { | |
8037 | preempt_disable(); | |
8038 | copy_fpregs_to_fpstate(&vcpu->arch.user_fpu); | |
8039 | /* PKRU is separately restored in kvm_x86_ops->run. */ | |
8040 | __copy_kernel_to_fpregs(&vcpu->arch.guest_fpu.state, | |
8041 | ~XFEATURE_MASK_PKRU); | |
8042 | preempt_enable(); | |
8043 | trace_kvm_fpu(1); | |
8044 | } | |
8045 | ||
8046 | /* When vcpu_run ends, restore user space FPU context. */ | |
8047 | static void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
8048 | { | |
8049 | preempt_disable(); | |
8050 | copy_fpregs_to_fpstate(&vcpu->arch.guest_fpu); | |
8051 | copy_kernel_to_fpregs(&vcpu->arch.user_fpu.state); | |
8052 | preempt_enable(); | |
8053 | ++vcpu->stat.fpu_reload; | |
8054 | trace_kvm_fpu(0); | |
8055 | } | |
8056 | ||
b6c7a5dc HB |
8057 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
8058 | { | |
8059 | int r; | |
b6c7a5dc | 8060 | |
accb757d | 8061 | vcpu_load(vcpu); |
20b7035c | 8062 | kvm_sigset_activate(vcpu); |
5663d8f9 PX |
8063 | kvm_load_guest_fpu(vcpu); |
8064 | ||
a4535290 | 8065 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
2f173d26 JS |
8066 | if (kvm_run->immediate_exit) { |
8067 | r = -EINTR; | |
8068 | goto out; | |
8069 | } | |
b6c7a5dc | 8070 | kvm_vcpu_block(vcpu); |
66450a21 | 8071 | kvm_apic_accept_events(vcpu); |
72875d8a | 8072 | kvm_clear_request(KVM_REQ_UNHALT, vcpu); |
ac9f6dc0 | 8073 | r = -EAGAIN; |
a0595000 JS |
8074 | if (signal_pending(current)) { |
8075 | r = -EINTR; | |
8076 | vcpu->run->exit_reason = KVM_EXIT_INTR; | |
8077 | ++vcpu->stat.signal_exits; | |
8078 | } | |
ac9f6dc0 | 8079 | goto out; |
b6c7a5dc HB |
8080 | } |
8081 | ||
01643c51 KH |
8082 | if (vcpu->run->kvm_valid_regs & ~KVM_SYNC_X86_VALID_FIELDS) { |
8083 | r = -EINVAL; | |
8084 | goto out; | |
8085 | } | |
8086 | ||
8087 | if (vcpu->run->kvm_dirty_regs) { | |
8088 | r = sync_regs(vcpu); | |
8089 | if (r != 0) | |
8090 | goto out; | |
8091 | } | |
8092 | ||
b6c7a5dc | 8093 | /* re-sync apic's tpr */ |
35754c98 | 8094 | if (!lapic_in_kernel(vcpu)) { |
eea1cff9 AP |
8095 | if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) { |
8096 | r = -EINVAL; | |
8097 | goto out; | |
8098 | } | |
8099 | } | |
b6c7a5dc | 8100 | |
716d51ab GN |
8101 | if (unlikely(vcpu->arch.complete_userspace_io)) { |
8102 | int (*cui)(struct kvm_vcpu *) = vcpu->arch.complete_userspace_io; | |
8103 | vcpu->arch.complete_userspace_io = NULL; | |
8104 | r = cui(vcpu); | |
8105 | if (r <= 0) | |
5663d8f9 | 8106 | goto out; |
716d51ab GN |
8107 | } else |
8108 | WARN_ON(vcpu->arch.pio.count || vcpu->mmio_needed); | |
5287f194 | 8109 | |
460df4c1 PB |
8110 | if (kvm_run->immediate_exit) |
8111 | r = -EINTR; | |
8112 | else | |
8113 | r = vcpu_run(vcpu); | |
b6c7a5dc HB |
8114 | |
8115 | out: | |
5663d8f9 | 8116 | kvm_put_guest_fpu(vcpu); |
01643c51 KH |
8117 | if (vcpu->run->kvm_valid_regs) |
8118 | store_regs(vcpu); | |
f1d86e46 | 8119 | post_kvm_run_save(vcpu); |
20b7035c | 8120 | kvm_sigset_deactivate(vcpu); |
b6c7a5dc | 8121 | |
accb757d | 8122 | vcpu_put(vcpu); |
b6c7a5dc HB |
8123 | return r; |
8124 | } | |
8125 | ||
01643c51 | 8126 | static void __get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
b6c7a5dc | 8127 | { |
7ae441ea GN |
8128 | if (vcpu->arch.emulate_regs_need_sync_to_vcpu) { |
8129 | /* | |
8130 | * We are here if userspace calls get_regs() in the middle of | |
8131 | * instruction emulation. Registers state needs to be copied | |
4a969980 | 8132 | * back from emulation context to vcpu. Userspace shouldn't do |
7ae441ea GN |
8133 | * that usually, but some bad designed PV devices (vmware |
8134 | * backdoor interface) need this to work | |
8135 | */ | |
dd856efa | 8136 | emulator_writeback_register_cache(&vcpu->arch.emulate_ctxt); |
7ae441ea GN |
8137 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
8138 | } | |
5fdbf976 MT |
8139 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
8140 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
8141 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
8142 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
8143 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8144 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
8145 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
8146 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 8147 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
8148 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
8149 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
8150 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
8151 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
8152 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
8153 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
8154 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
8155 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
8156 | #endif |
8157 | ||
5fdbf976 | 8158 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 8159 | regs->rflags = kvm_get_rflags(vcpu); |
01643c51 | 8160 | } |
b6c7a5dc | 8161 | |
01643c51 KH |
8162 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
8163 | { | |
8164 | vcpu_load(vcpu); | |
8165 | __get_regs(vcpu, regs); | |
1fc9b76b | 8166 | vcpu_put(vcpu); |
b6c7a5dc HB |
8167 | return 0; |
8168 | } | |
8169 | ||
01643c51 | 8170 | static void __set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
b6c7a5dc | 8171 | { |
7ae441ea GN |
8172 | vcpu->arch.emulate_regs_need_sync_from_vcpu = true; |
8173 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; | |
8174 | ||
5fdbf976 MT |
8175 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
8176 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
8177 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
8178 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
8179 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
8180 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
8181 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
8182 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 8183 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
8184 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
8185 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
8186 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
8187 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
8188 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
8189 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
8190 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
8191 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
8192 | #endif |
8193 | ||
5fdbf976 | 8194 | kvm_rip_write(vcpu, regs->rip); |
d73235d1 | 8195 | kvm_set_rflags(vcpu, regs->rflags | X86_EFLAGS_FIXED); |
b6c7a5dc | 8196 | |
b4f14abd JK |
8197 | vcpu->arch.exception.pending = false; |
8198 | ||
3842d135 | 8199 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
01643c51 | 8200 | } |
3842d135 | 8201 | |
01643c51 KH |
8202 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
8203 | { | |
8204 | vcpu_load(vcpu); | |
8205 | __set_regs(vcpu, regs); | |
875656fe | 8206 | vcpu_put(vcpu); |
b6c7a5dc HB |
8207 | return 0; |
8208 | } | |
8209 | ||
b6c7a5dc HB |
8210 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
8211 | { | |
8212 | struct kvm_segment cs; | |
8213 | ||
3e6e0aab | 8214 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
8215 | *db = cs.db; |
8216 | *l = cs.l; | |
8217 | } | |
8218 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
8219 | ||
01643c51 | 8220 | static void __get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) |
b6c7a5dc | 8221 | { |
89a27f4d | 8222 | struct desc_ptr dt; |
b6c7a5dc | 8223 | |
3e6e0aab GT |
8224 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
8225 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
8226 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
8227 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
8228 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
8229 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 8230 | |
3e6e0aab GT |
8231 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
8232 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
8233 | |
8234 | kvm_x86_ops->get_idt(vcpu, &dt); | |
89a27f4d GN |
8235 | sregs->idt.limit = dt.size; |
8236 | sregs->idt.base = dt.address; | |
b6c7a5dc | 8237 | kvm_x86_ops->get_gdt(vcpu, &dt); |
89a27f4d GN |
8238 | sregs->gdt.limit = dt.size; |
8239 | sregs->gdt.base = dt.address; | |
b6c7a5dc | 8240 | |
4d4ec087 | 8241 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c | 8242 | sregs->cr2 = vcpu->arch.cr2; |
9f8fe504 | 8243 | sregs->cr3 = kvm_read_cr3(vcpu); |
fc78f519 | 8244 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 8245 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 8246 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
8247 | sregs->apic_base = kvm_get_apic_base(vcpu); |
8248 | ||
0e96f31e | 8249 | memset(sregs->interrupt_bitmap, 0, sizeof(sregs->interrupt_bitmap)); |
b6c7a5dc | 8250 | |
04140b41 | 8251 | if (vcpu->arch.interrupt.injected && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
8252 | set_bit(vcpu->arch.interrupt.nr, |
8253 | (unsigned long *)sregs->interrupt_bitmap); | |
01643c51 | 8254 | } |
16d7a191 | 8255 | |
01643c51 KH |
8256 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
8257 | struct kvm_sregs *sregs) | |
8258 | { | |
8259 | vcpu_load(vcpu); | |
8260 | __get_sregs(vcpu, sregs); | |
bcdec41c | 8261 | vcpu_put(vcpu); |
b6c7a5dc HB |
8262 | return 0; |
8263 | } | |
8264 | ||
62d9f0db MT |
8265 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
8266 | struct kvm_mp_state *mp_state) | |
8267 | { | |
fd232561 CD |
8268 | vcpu_load(vcpu); |
8269 | ||
66450a21 | 8270 | kvm_apic_accept_events(vcpu); |
6aef266c SV |
8271 | if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED && |
8272 | vcpu->arch.pv.pv_unhalted) | |
8273 | mp_state->mp_state = KVM_MP_STATE_RUNNABLE; | |
8274 | else | |
8275 | mp_state->mp_state = vcpu->arch.mp_state; | |
8276 | ||
fd232561 | 8277 | vcpu_put(vcpu); |
62d9f0db MT |
8278 | return 0; |
8279 | } | |
8280 | ||
8281 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
8282 | struct kvm_mp_state *mp_state) | |
8283 | { | |
e83dff5e CD |
8284 | int ret = -EINVAL; |
8285 | ||
8286 | vcpu_load(vcpu); | |
8287 | ||
bce87cce | 8288 | if (!lapic_in_kernel(vcpu) && |
66450a21 | 8289 | mp_state->mp_state != KVM_MP_STATE_RUNNABLE) |
e83dff5e | 8290 | goto out; |
66450a21 | 8291 | |
28bf2888 DH |
8292 | /* INITs are latched while in SMM */ |
8293 | if ((is_smm(vcpu) || vcpu->arch.smi_pending) && | |
8294 | (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED || | |
8295 | mp_state->mp_state == KVM_MP_STATE_INIT_RECEIVED)) | |
e83dff5e | 8296 | goto out; |
28bf2888 | 8297 | |
66450a21 JK |
8298 | if (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED) { |
8299 | vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; | |
8300 | set_bit(KVM_APIC_SIPI, &vcpu->arch.apic->pending_events); | |
8301 | } else | |
8302 | vcpu->arch.mp_state = mp_state->mp_state; | |
3842d135 | 8303 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
e83dff5e CD |
8304 | |
8305 | ret = 0; | |
8306 | out: | |
8307 | vcpu_put(vcpu); | |
8308 | return ret; | |
62d9f0db MT |
8309 | } |
8310 | ||
7f3d35fd KW |
8311 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, |
8312 | int reason, bool has_error_code, u32 error_code) | |
b6c7a5dc | 8313 | { |
9d74191a | 8314 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d | 8315 | int ret; |
e01c2426 | 8316 | |
8ec4722d | 8317 | init_emulate_ctxt(vcpu); |
c697518a | 8318 | |
7f3d35fd | 8319 | ret = emulator_task_switch(ctxt, tss_selector, idt_index, reason, |
9d74191a | 8320 | has_error_code, error_code); |
c697518a | 8321 | |
c697518a | 8322 | if (ret) |
19d04437 | 8323 | return EMULATE_FAIL; |
37817f29 | 8324 | |
9d74191a TY |
8325 | kvm_rip_write(vcpu, ctxt->eip); |
8326 | kvm_set_rflags(vcpu, ctxt->eflags); | |
3842d135 | 8327 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
19d04437 | 8328 | return EMULATE_DONE; |
37817f29 IE |
8329 | } |
8330 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
8331 | ||
3140c156 | 8332 | static int kvm_valid_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) |
f2981033 | 8333 | { |
74fec5b9 TL |
8334 | if (!guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) && |
8335 | (sregs->cr4 & X86_CR4_OSXSAVE)) | |
8336 | return -EINVAL; | |
8337 | ||
37b95951 | 8338 | if ((sregs->efer & EFER_LME) && (sregs->cr0 & X86_CR0_PG)) { |
f2981033 LT |
8339 | /* |
8340 | * When EFER.LME and CR0.PG are set, the processor is in | |
8341 | * 64-bit mode (though maybe in a 32-bit code segment). | |
8342 | * CR4.PAE and EFER.LMA must be set. | |
8343 | */ | |
37b95951 | 8344 | if (!(sregs->cr4 & X86_CR4_PAE) |
f2981033 LT |
8345 | || !(sregs->efer & EFER_LMA)) |
8346 | return -EINVAL; | |
8347 | } else { | |
8348 | /* | |
8349 | * Not in 64-bit mode: EFER.LMA is clear and the code | |
8350 | * segment cannot be 64-bit. | |
8351 | */ | |
8352 | if (sregs->efer & EFER_LMA || sregs->cs.l) | |
8353 | return -EINVAL; | |
8354 | } | |
8355 | ||
8356 | return 0; | |
8357 | } | |
8358 | ||
01643c51 | 8359 | static int __set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) |
b6c7a5dc | 8360 | { |
58cb628d | 8361 | struct msr_data apic_base_msr; |
b6c7a5dc | 8362 | int mmu_reset_needed = 0; |
c4d21882 | 8363 | int cpuid_update_needed = 0; |
63f42e02 | 8364 | int pending_vec, max_bits, idx; |
89a27f4d | 8365 | struct desc_ptr dt; |
b4ef9d4e CD |
8366 | int ret = -EINVAL; |
8367 | ||
f2981033 | 8368 | if (kvm_valid_sregs(vcpu, sregs)) |
8dbfb2bf | 8369 | goto out; |
f2981033 | 8370 | |
d3802286 JM |
8371 | apic_base_msr.data = sregs->apic_base; |
8372 | apic_base_msr.host_initiated = true; | |
8373 | if (kvm_set_apic_base(vcpu, &apic_base_msr)) | |
b4ef9d4e | 8374 | goto out; |
6d1068b3 | 8375 | |
89a27f4d GN |
8376 | dt.size = sregs->idt.limit; |
8377 | dt.address = sregs->idt.base; | |
b6c7a5dc | 8378 | kvm_x86_ops->set_idt(vcpu, &dt); |
89a27f4d GN |
8379 | dt.size = sregs->gdt.limit; |
8380 | dt.address = sregs->gdt.base; | |
b6c7a5dc HB |
8381 | kvm_x86_ops->set_gdt(vcpu, &dt); |
8382 | ||
ad312c7c | 8383 | vcpu->arch.cr2 = sregs->cr2; |
9f8fe504 | 8384 | mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3; |
dc7e795e | 8385 | vcpu->arch.cr3 = sregs->cr3; |
aff48baa | 8386 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
b6c7a5dc | 8387 | |
2d3ad1f4 | 8388 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 8389 | |
f6801dff | 8390 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 8391 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc | 8392 | |
4d4ec087 | 8393 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 8394 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 8395 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 8396 | |
fc78f519 | 8397 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
c4d21882 WH |
8398 | cpuid_update_needed |= ((kvm_read_cr4(vcpu) ^ sregs->cr4) & |
8399 | (X86_CR4_OSXSAVE | X86_CR4_PKE)); | |
b6c7a5dc | 8400 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
c4d21882 | 8401 | if (cpuid_update_needed) |
00b27a3e | 8402 | kvm_update_cpuid(vcpu); |
63f42e02 XG |
8403 | |
8404 | idx = srcu_read_lock(&vcpu->kvm->srcu); | |
d35b34a9 | 8405 | if (!is_long_mode(vcpu) && is_pae(vcpu) && is_paging(vcpu)) { |
9f8fe504 | 8406 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); |
7c93be44 MT |
8407 | mmu_reset_needed = 1; |
8408 | } | |
63f42e02 | 8409 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b6c7a5dc HB |
8410 | |
8411 | if (mmu_reset_needed) | |
8412 | kvm_mmu_reset_context(vcpu); | |
8413 | ||
a50abc3b | 8414 | max_bits = KVM_NR_INTERRUPTS; |
923c61bb GN |
8415 | pending_vec = find_first_bit( |
8416 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
8417 | if (pending_vec < max_bits) { | |
66fd3f7f | 8418 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb | 8419 | pr_debug("Set back pending irq %d\n", pending_vec); |
b6c7a5dc HB |
8420 | } |
8421 | ||
3e6e0aab GT |
8422 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
8423 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
8424 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
8425 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
8426 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
8427 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 8428 | |
3e6e0aab GT |
8429 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
8430 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 8431 | |
5f0269f5 ME |
8432 | update_cr8_intercept(vcpu); |
8433 | ||
9c3e4aab | 8434 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 8435 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 8436 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 8437 | !is_protmode(vcpu)) |
9c3e4aab MT |
8438 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
8439 | ||
3842d135 AK |
8440 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
8441 | ||
b4ef9d4e CD |
8442 | ret = 0; |
8443 | out: | |
01643c51 KH |
8444 | return ret; |
8445 | } | |
8446 | ||
8447 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
8448 | struct kvm_sregs *sregs) | |
8449 | { | |
8450 | int ret; | |
8451 | ||
8452 | vcpu_load(vcpu); | |
8453 | ret = __set_sregs(vcpu, sregs); | |
b4ef9d4e CD |
8454 | vcpu_put(vcpu); |
8455 | return ret; | |
b6c7a5dc HB |
8456 | } |
8457 | ||
d0bfb940 JK |
8458 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
8459 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 8460 | { |
355be0b9 | 8461 | unsigned long rflags; |
ae675ef0 | 8462 | int i, r; |
b6c7a5dc | 8463 | |
66b56562 CD |
8464 | vcpu_load(vcpu); |
8465 | ||
4f926bf2 JK |
8466 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
8467 | r = -EBUSY; | |
8468 | if (vcpu->arch.exception.pending) | |
2122ff5e | 8469 | goto out; |
4f926bf2 JK |
8470 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
8471 | kvm_queue_exception(vcpu, DB_VECTOR); | |
8472 | else | |
8473 | kvm_queue_exception(vcpu, BP_VECTOR); | |
8474 | } | |
8475 | ||
91586a3b JK |
8476 | /* |
8477 | * Read rflags as long as potentially injected trace flags are still | |
8478 | * filtered out. | |
8479 | */ | |
8480 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
8481 | |
8482 | vcpu->guest_debug = dbg->control; | |
8483 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
8484 | vcpu->guest_debug = 0; | |
8485 | ||
8486 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
8487 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
8488 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
c8639010 | 8489 | vcpu->arch.guest_debug_dr7 = dbg->arch.debugreg[7]; |
ae675ef0 JK |
8490 | } else { |
8491 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
8492 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
ae675ef0 | 8493 | } |
c8639010 | 8494 | kvm_update_dr7(vcpu); |
ae675ef0 | 8495 | |
f92653ee JK |
8496 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
8497 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + | |
8498 | get_segment_base(vcpu, VCPU_SREG_CS); | |
94fe45da | 8499 | |
91586a3b JK |
8500 | /* |
8501 | * Trigger an rflags update that will inject or remove the trace | |
8502 | * flags. | |
8503 | */ | |
8504 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 8505 | |
a96036b8 | 8506 | kvm_x86_ops->update_bp_intercept(vcpu); |
b6c7a5dc | 8507 | |
4f926bf2 | 8508 | r = 0; |
d0bfb940 | 8509 | |
2122ff5e | 8510 | out: |
66b56562 | 8511 | vcpu_put(vcpu); |
b6c7a5dc HB |
8512 | return r; |
8513 | } | |
8514 | ||
8b006791 ZX |
8515 | /* |
8516 | * Translate a guest virtual address to a guest physical address. | |
8517 | */ | |
8518 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
8519 | struct kvm_translation *tr) | |
8520 | { | |
8521 | unsigned long vaddr = tr->linear_address; | |
8522 | gpa_t gpa; | |
f656ce01 | 8523 | int idx; |
8b006791 | 8524 | |
1da5b61d CD |
8525 | vcpu_load(vcpu); |
8526 | ||
f656ce01 | 8527 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 8528 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 8529 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
8530 | tr->physical_address = gpa; |
8531 | tr->valid = gpa != UNMAPPED_GVA; | |
8532 | tr->writeable = 1; | |
8533 | tr->usermode = 0; | |
8b006791 | 8534 | |
1da5b61d | 8535 | vcpu_put(vcpu); |
8b006791 ZX |
8536 | return 0; |
8537 | } | |
8538 | ||
d0752060 HB |
8539 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
8540 | { | |
1393123e | 8541 | struct fxregs_state *fxsave; |
d0752060 | 8542 | |
1393123e | 8543 | vcpu_load(vcpu); |
d0752060 | 8544 | |
1393123e | 8545 | fxsave = &vcpu->arch.guest_fpu.state.fxsave; |
d0752060 HB |
8546 | memcpy(fpu->fpr, fxsave->st_space, 128); |
8547 | fpu->fcw = fxsave->cwd; | |
8548 | fpu->fsw = fxsave->swd; | |
8549 | fpu->ftwx = fxsave->twd; | |
8550 | fpu->last_opcode = fxsave->fop; | |
8551 | fpu->last_ip = fxsave->rip; | |
8552 | fpu->last_dp = fxsave->rdp; | |
0e96f31e | 8553 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof(fxsave->xmm_space)); |
d0752060 | 8554 | |
1393123e | 8555 | vcpu_put(vcpu); |
d0752060 HB |
8556 | return 0; |
8557 | } | |
8558 | ||
8559 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
8560 | { | |
6a96bc7f CD |
8561 | struct fxregs_state *fxsave; |
8562 | ||
8563 | vcpu_load(vcpu); | |
8564 | ||
8565 | fxsave = &vcpu->arch.guest_fpu.state.fxsave; | |
d0752060 | 8566 | |
d0752060 HB |
8567 | memcpy(fxsave->st_space, fpu->fpr, 128); |
8568 | fxsave->cwd = fpu->fcw; | |
8569 | fxsave->swd = fpu->fsw; | |
8570 | fxsave->twd = fpu->ftwx; | |
8571 | fxsave->fop = fpu->last_opcode; | |
8572 | fxsave->rip = fpu->last_ip; | |
8573 | fxsave->rdp = fpu->last_dp; | |
0e96f31e | 8574 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof(fxsave->xmm_space)); |
d0752060 | 8575 | |
6a96bc7f | 8576 | vcpu_put(vcpu); |
d0752060 HB |
8577 | return 0; |
8578 | } | |
8579 | ||
01643c51 KH |
8580 | static void store_regs(struct kvm_vcpu *vcpu) |
8581 | { | |
8582 | BUILD_BUG_ON(sizeof(struct kvm_sync_regs) > SYNC_REGS_SIZE_BYTES); | |
8583 | ||
8584 | if (vcpu->run->kvm_valid_regs & KVM_SYNC_X86_REGS) | |
8585 | __get_regs(vcpu, &vcpu->run->s.regs.regs); | |
8586 | ||
8587 | if (vcpu->run->kvm_valid_regs & KVM_SYNC_X86_SREGS) | |
8588 | __get_sregs(vcpu, &vcpu->run->s.regs.sregs); | |
8589 | ||
8590 | if (vcpu->run->kvm_valid_regs & KVM_SYNC_X86_EVENTS) | |
8591 | kvm_vcpu_ioctl_x86_get_vcpu_events( | |
8592 | vcpu, &vcpu->run->s.regs.events); | |
8593 | } | |
8594 | ||
8595 | static int sync_regs(struct kvm_vcpu *vcpu) | |
8596 | { | |
8597 | if (vcpu->run->kvm_dirty_regs & ~KVM_SYNC_X86_VALID_FIELDS) | |
8598 | return -EINVAL; | |
8599 | ||
8600 | if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_REGS) { | |
8601 | __set_regs(vcpu, &vcpu->run->s.regs.regs); | |
8602 | vcpu->run->kvm_dirty_regs &= ~KVM_SYNC_X86_REGS; | |
8603 | } | |
8604 | if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_SREGS) { | |
8605 | if (__set_sregs(vcpu, &vcpu->run->s.regs.sregs)) | |
8606 | return -EINVAL; | |
8607 | vcpu->run->kvm_dirty_regs &= ~KVM_SYNC_X86_SREGS; | |
8608 | } | |
8609 | if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_EVENTS) { | |
8610 | if (kvm_vcpu_ioctl_x86_set_vcpu_events( | |
8611 | vcpu, &vcpu->run->s.regs.events)) | |
8612 | return -EINVAL; | |
8613 | vcpu->run->kvm_dirty_regs &= ~KVM_SYNC_X86_EVENTS; | |
8614 | } | |
8615 | ||
8616 | return 0; | |
8617 | } | |
8618 | ||
0ee6a517 | 8619 | static void fx_init(struct kvm_vcpu *vcpu) |
d0752060 | 8620 | { |
bf935b0b | 8621 | fpstate_init(&vcpu->arch.guest_fpu.state); |
782511b0 | 8622 | if (boot_cpu_has(X86_FEATURE_XSAVES)) |
7366ed77 | 8623 | vcpu->arch.guest_fpu.state.xsave.header.xcomp_bv = |
df1daba7 | 8624 | host_xcr0 | XSTATE_COMPACTION_ENABLED; |
d0752060 | 8625 | |
2acf923e DC |
8626 | /* |
8627 | * Ensure guest xcr0 is valid for loading | |
8628 | */ | |
d91cab78 | 8629 | vcpu->arch.xcr0 = XFEATURE_MASK_FP; |
2acf923e | 8630 | |
ad312c7c | 8631 | vcpu->arch.cr0 |= X86_CR0_ET; |
d0752060 | 8632 | } |
d0752060 | 8633 | |
e9b11c17 ZX |
8634 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) |
8635 | { | |
bd768e14 IY |
8636 | void *wbinvd_dirty_mask = vcpu->arch.wbinvd_dirty_mask; |
8637 | ||
12f9a48f | 8638 | kvmclock_reset(vcpu); |
7f1ea208 | 8639 | |
e9b11c17 | 8640 | kvm_x86_ops->vcpu_free(vcpu); |
bd768e14 | 8641 | free_cpumask_var(wbinvd_dirty_mask); |
e9b11c17 ZX |
8642 | } |
8643 | ||
8644 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
8645 | unsigned int id) | |
8646 | { | |
c447e76b LL |
8647 | struct kvm_vcpu *vcpu; |
8648 | ||
b0c39dc6 | 8649 | if (kvm_check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0) |
6755bae8 ZA |
8650 | printk_once(KERN_WARNING |
8651 | "kvm: SMP vm created on host with unstable TSC; " | |
8652 | "guest TSC will not be reliable\n"); | |
c447e76b LL |
8653 | |
8654 | vcpu = kvm_x86_ops->vcpu_create(kvm, id); | |
8655 | ||
c447e76b | 8656 | return vcpu; |
26e5215f | 8657 | } |
e9b11c17 | 8658 | |
26e5215f AK |
8659 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
8660 | { | |
e53d88af | 8661 | vcpu->arch.msr_platform_info = MSR_PLATFORM_INFO_CPUID_FAULT; |
19efffa2 | 8662 | kvm_vcpu_mtrr_init(vcpu); |
ec7660cc | 8663 | vcpu_load(vcpu); |
d28bc9dd | 8664 | kvm_vcpu_reset(vcpu, false); |
e1732991 | 8665 | kvm_init_mmu(vcpu, false); |
e9b11c17 | 8666 | vcpu_put(vcpu); |
ec7660cc | 8667 | return 0; |
e9b11c17 ZX |
8668 | } |
8669 | ||
31928aa5 | 8670 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 8671 | { |
8fe8ab46 | 8672 | struct msr_data msr; |
332967a3 | 8673 | struct kvm *kvm = vcpu->kvm; |
42897d86 | 8674 | |
d3457c87 RK |
8675 | kvm_hv_vcpu_postcreate(vcpu); |
8676 | ||
ec7660cc | 8677 | if (mutex_lock_killable(&vcpu->mutex)) |
31928aa5 | 8678 | return; |
ec7660cc | 8679 | vcpu_load(vcpu); |
8fe8ab46 WA |
8680 | msr.data = 0x0; |
8681 | msr.index = MSR_IA32_TSC; | |
8682 | msr.host_initiated = true; | |
8683 | kvm_write_tsc(vcpu, &msr); | |
42897d86 | 8684 | vcpu_put(vcpu); |
ec7660cc | 8685 | mutex_unlock(&vcpu->mutex); |
42897d86 | 8686 | |
630994b3 MT |
8687 | if (!kvmclock_periodic_sync) |
8688 | return; | |
8689 | ||
332967a3 AJ |
8690 | schedule_delayed_work(&kvm->arch.kvmclock_sync_work, |
8691 | KVMCLOCK_SYNC_PERIOD); | |
42897d86 MT |
8692 | } |
8693 | ||
d40ccc62 | 8694 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 | 8695 | { |
344d9588 GN |
8696 | vcpu->arch.apf.msr_val = 0; |
8697 | ||
ec7660cc | 8698 | vcpu_load(vcpu); |
e9b11c17 ZX |
8699 | kvm_mmu_unload(vcpu); |
8700 | vcpu_put(vcpu); | |
8701 | ||
8702 | kvm_x86_ops->vcpu_free(vcpu); | |
8703 | } | |
8704 | ||
d28bc9dd | 8705 | void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) |
e9b11c17 | 8706 | { |
b7e31be3 RK |
8707 | kvm_lapic_reset(vcpu, init_event); |
8708 | ||
e69fab5d PB |
8709 | vcpu->arch.hflags = 0; |
8710 | ||
c43203ca | 8711 | vcpu->arch.smi_pending = 0; |
52797bf9 | 8712 | vcpu->arch.smi_count = 0; |
7460fb4a AK |
8713 | atomic_set(&vcpu->arch.nmi_queued, 0); |
8714 | vcpu->arch.nmi_pending = 0; | |
448fa4a9 | 8715 | vcpu->arch.nmi_injected = false; |
5f7552d4 NA |
8716 | kvm_clear_interrupt_queue(vcpu); |
8717 | kvm_clear_exception_queue(vcpu); | |
664f8e26 | 8718 | vcpu->arch.exception.pending = false; |
448fa4a9 | 8719 | |
42dbaa5a | 8720 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); |
ae561ede | 8721 | kvm_update_dr0123(vcpu); |
6f43ed01 | 8722 | vcpu->arch.dr6 = DR6_INIT; |
73aaf249 | 8723 | kvm_update_dr6(vcpu); |
42dbaa5a | 8724 | vcpu->arch.dr7 = DR7_FIXED_1; |
c8639010 | 8725 | kvm_update_dr7(vcpu); |
42dbaa5a | 8726 | |
1119022c NA |
8727 | vcpu->arch.cr2 = 0; |
8728 | ||
3842d135 | 8729 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
344d9588 | 8730 | vcpu->arch.apf.msr_val = 0; |
c9aaa895 | 8731 | vcpu->arch.st.msr_val = 0; |
3842d135 | 8732 | |
12f9a48f GC |
8733 | kvmclock_reset(vcpu); |
8734 | ||
af585b92 GN |
8735 | kvm_clear_async_pf_completion_queue(vcpu); |
8736 | kvm_async_pf_hash_reset(vcpu); | |
8737 | vcpu->arch.apf.halted = false; | |
3842d135 | 8738 | |
a554d207 WL |
8739 | if (kvm_mpx_supported()) { |
8740 | void *mpx_state_buffer; | |
8741 | ||
8742 | /* | |
8743 | * To avoid have the INIT path from kvm_apic_has_events() that be | |
8744 | * called with loaded FPU and does not let userspace fix the state. | |
8745 | */ | |
f775b13e RR |
8746 | if (init_event) |
8747 | kvm_put_guest_fpu(vcpu); | |
a554d207 WL |
8748 | mpx_state_buffer = get_xsave_addr(&vcpu->arch.guest_fpu.state.xsave, |
8749 | XFEATURE_MASK_BNDREGS); | |
8750 | if (mpx_state_buffer) | |
8751 | memset(mpx_state_buffer, 0, sizeof(struct mpx_bndreg_state)); | |
8752 | mpx_state_buffer = get_xsave_addr(&vcpu->arch.guest_fpu.state.xsave, | |
8753 | XFEATURE_MASK_BNDCSR); | |
8754 | if (mpx_state_buffer) | |
8755 | memset(mpx_state_buffer, 0, sizeof(struct mpx_bndcsr)); | |
f775b13e RR |
8756 | if (init_event) |
8757 | kvm_load_guest_fpu(vcpu); | |
a554d207 WL |
8758 | } |
8759 | ||
64d60670 | 8760 | if (!init_event) { |
d28bc9dd | 8761 | kvm_pmu_reset(vcpu); |
64d60670 | 8762 | vcpu->arch.smbase = 0x30000; |
db2336a8 | 8763 | |
db2336a8 | 8764 | vcpu->arch.msr_misc_features_enables = 0; |
a554d207 WL |
8765 | |
8766 | vcpu->arch.xcr0 = XFEATURE_MASK_FP; | |
64d60670 | 8767 | } |
f5132b01 | 8768 | |
66f7b72e JS |
8769 | memset(vcpu->arch.regs, 0, sizeof(vcpu->arch.regs)); |
8770 | vcpu->arch.regs_avail = ~0; | |
8771 | vcpu->arch.regs_dirty = ~0; | |
8772 | ||
a554d207 WL |
8773 | vcpu->arch.ia32_xss = 0; |
8774 | ||
d28bc9dd | 8775 | kvm_x86_ops->vcpu_reset(vcpu, init_event); |
e9b11c17 ZX |
8776 | } |
8777 | ||
2b4a273b | 8778 | void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector) |
66450a21 JK |
8779 | { |
8780 | struct kvm_segment cs; | |
8781 | ||
8782 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
8783 | cs.selector = vector << 8; | |
8784 | cs.base = vector << 12; | |
8785 | kvm_set_segment(vcpu, &cs, VCPU_SREG_CS); | |
8786 | kvm_rip_write(vcpu, 0); | |
e9b11c17 ZX |
8787 | } |
8788 | ||
13a34e06 | 8789 | int kvm_arch_hardware_enable(void) |
e9b11c17 | 8790 | { |
ca84d1a2 ZA |
8791 | struct kvm *kvm; |
8792 | struct kvm_vcpu *vcpu; | |
8793 | int i; | |
0dd6a6ed ZA |
8794 | int ret; |
8795 | u64 local_tsc; | |
8796 | u64 max_tsc = 0; | |
8797 | bool stable, backwards_tsc = false; | |
18863bdd AK |
8798 | |
8799 | kvm_shared_msr_cpu_online(); | |
13a34e06 | 8800 | ret = kvm_x86_ops->hardware_enable(); |
0dd6a6ed ZA |
8801 | if (ret != 0) |
8802 | return ret; | |
8803 | ||
4ea1636b | 8804 | local_tsc = rdtsc(); |
b0c39dc6 | 8805 | stable = !kvm_check_tsc_unstable(); |
0dd6a6ed ZA |
8806 | list_for_each_entry(kvm, &vm_list, vm_list) { |
8807 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
8808 | if (!stable && vcpu->cpu == smp_processor_id()) | |
105b21bb | 8809 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0dd6a6ed ZA |
8810 | if (stable && vcpu->arch.last_host_tsc > local_tsc) { |
8811 | backwards_tsc = true; | |
8812 | if (vcpu->arch.last_host_tsc > max_tsc) | |
8813 | max_tsc = vcpu->arch.last_host_tsc; | |
8814 | } | |
8815 | } | |
8816 | } | |
8817 | ||
8818 | /* | |
8819 | * Sometimes, even reliable TSCs go backwards. This happens on | |
8820 | * platforms that reset TSC during suspend or hibernate actions, but | |
8821 | * maintain synchronization. We must compensate. Fortunately, we can | |
8822 | * detect that condition here, which happens early in CPU bringup, | |
8823 | * before any KVM threads can be running. Unfortunately, we can't | |
8824 | * bring the TSCs fully up to date with real time, as we aren't yet far | |
8825 | * enough into CPU bringup that we know how much real time has actually | |
108b249c | 8826 | * elapsed; our helper function, ktime_get_boot_ns() will be using boot |
0dd6a6ed ZA |
8827 | * variables that haven't been updated yet. |
8828 | * | |
8829 | * So we simply find the maximum observed TSC above, then record the | |
8830 | * adjustment to TSC in each VCPU. When the VCPU later gets loaded, | |
8831 | * the adjustment will be applied. Note that we accumulate | |
8832 | * adjustments, in case multiple suspend cycles happen before some VCPU | |
8833 | * gets a chance to run again. In the event that no KVM threads get a | |
8834 | * chance to run, we will miss the entire elapsed period, as we'll have | |
8835 | * reset last_host_tsc, so VCPUs will not have the TSC adjusted and may | |
8836 | * loose cycle time. This isn't too big a deal, since the loss will be | |
8837 | * uniform across all VCPUs (not to mention the scenario is extremely | |
8838 | * unlikely). It is possible that a second hibernate recovery happens | |
8839 | * much faster than a first, causing the observed TSC here to be | |
8840 | * smaller; this would require additional padding adjustment, which is | |
8841 | * why we set last_host_tsc to the local tsc observed here. | |
8842 | * | |
8843 | * N.B. - this code below runs only on platforms with reliable TSC, | |
8844 | * as that is the only way backwards_tsc is set above. Also note | |
8845 | * that this runs for ALL vcpus, which is not a bug; all VCPUs should | |
8846 | * have the same delta_cyc adjustment applied if backwards_tsc | |
8847 | * is detected. Note further, this adjustment is only done once, | |
8848 | * as we reset last_host_tsc on all VCPUs to stop this from being | |
8849 | * called multiple times (one for each physical CPU bringup). | |
8850 | * | |
4a969980 | 8851 | * Platforms with unreliable TSCs don't have to deal with this, they |
0dd6a6ed ZA |
8852 | * will be compensated by the logic in vcpu_load, which sets the TSC to |
8853 | * catchup mode. This will catchup all VCPUs to real time, but cannot | |
8854 | * guarantee that they stay in perfect synchronization. | |
8855 | */ | |
8856 | if (backwards_tsc) { | |
8857 | u64 delta_cyc = max_tsc - local_tsc; | |
8858 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
a826faf1 | 8859 | kvm->arch.backwards_tsc_observed = true; |
0dd6a6ed ZA |
8860 | kvm_for_each_vcpu(i, vcpu, kvm) { |
8861 | vcpu->arch.tsc_offset_adjustment += delta_cyc; | |
8862 | vcpu->arch.last_host_tsc = local_tsc; | |
105b21bb | 8863 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
0dd6a6ed ZA |
8864 | } |
8865 | ||
8866 | /* | |
8867 | * We have to disable TSC offset matching.. if you were | |
8868 | * booting a VM while issuing an S4 host suspend.... | |
8869 | * you may have some problem. Solving this issue is | |
8870 | * left as an exercise to the reader. | |
8871 | */ | |
8872 | kvm->arch.last_tsc_nsec = 0; | |
8873 | kvm->arch.last_tsc_write = 0; | |
8874 | } | |
8875 | ||
8876 | } | |
8877 | return 0; | |
e9b11c17 ZX |
8878 | } |
8879 | ||
13a34e06 | 8880 | void kvm_arch_hardware_disable(void) |
e9b11c17 | 8881 | { |
13a34e06 RK |
8882 | kvm_x86_ops->hardware_disable(); |
8883 | drop_user_return_notifiers(); | |
e9b11c17 ZX |
8884 | } |
8885 | ||
8886 | int kvm_arch_hardware_setup(void) | |
8887 | { | |
9e9c3fe4 NA |
8888 | int r; |
8889 | ||
8890 | r = kvm_x86_ops->hardware_setup(); | |
8891 | if (r != 0) | |
8892 | return r; | |
8893 | ||
35181e86 HZ |
8894 | if (kvm_has_tsc_control) { |
8895 | /* | |
8896 | * Make sure the user can only configure tsc_khz values that | |
8897 | * fit into a signed integer. | |
273ba457 | 8898 | * A min value is not calculated because it will always |
35181e86 HZ |
8899 | * be 1 on all machines. |
8900 | */ | |
8901 | u64 max = min(0x7fffffffULL, | |
8902 | __scale_tsc(kvm_max_tsc_scaling_ratio, tsc_khz)); | |
8903 | kvm_max_guest_tsc_khz = max; | |
8904 | ||
ad721883 | 8905 | kvm_default_tsc_scaling_ratio = 1ULL << kvm_tsc_scaling_ratio_frac_bits; |
35181e86 | 8906 | } |
ad721883 | 8907 | |
9e9c3fe4 NA |
8908 | kvm_init_msr_list(); |
8909 | return 0; | |
e9b11c17 ZX |
8910 | } |
8911 | ||
8912 | void kvm_arch_hardware_unsetup(void) | |
8913 | { | |
8914 | kvm_x86_ops->hardware_unsetup(); | |
8915 | } | |
8916 | ||
8917 | void kvm_arch_check_processor_compat(void *rtn) | |
8918 | { | |
8919 | kvm_x86_ops->check_processor_compatibility(rtn); | |
d71ba788 PB |
8920 | } |
8921 | ||
8922 | bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu) | |
8923 | { | |
8924 | return vcpu->kvm->arch.bsp_vcpu_id == vcpu->vcpu_id; | |
8925 | } | |
8926 | EXPORT_SYMBOL_GPL(kvm_vcpu_is_reset_bsp); | |
8927 | ||
8928 | bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) | |
8929 | { | |
8930 | return (vcpu->arch.apic_base & MSR_IA32_APICBASE_BSP) != 0; | |
e9b11c17 ZX |
8931 | } |
8932 | ||
54e9818f | 8933 | struct static_key kvm_no_apic_vcpu __read_mostly; |
bce87cce | 8934 | EXPORT_SYMBOL_GPL(kvm_no_apic_vcpu); |
54e9818f | 8935 | |
e9b11c17 ZX |
8936 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
8937 | { | |
8938 | struct page *page; | |
e9b11c17 ZX |
8939 | int r; |
8940 | ||
b2a05fef | 8941 | vcpu->arch.apicv_active = kvm_x86_ops->get_enable_apicv(vcpu); |
9aabc88f | 8942 | vcpu->arch.emulate_ctxt.ops = &emulate_ops; |
26de7988 | 8943 | if (!irqchip_in_kernel(vcpu->kvm) || kvm_vcpu_is_reset_bsp(vcpu)) |
a4535290 | 8944 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 8945 | else |
a4535290 | 8946 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
8947 | |
8948 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
8949 | if (!page) { | |
8950 | r = -ENOMEM; | |
8951 | goto fail; | |
8952 | } | |
ad312c7c | 8953 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 | 8954 | |
cc578287 | 8955 | kvm_set_tsc_khz(vcpu, max_tsc_khz); |
c285545f | 8956 | |
e9b11c17 ZX |
8957 | r = kvm_mmu_create(vcpu); |
8958 | if (r < 0) | |
8959 | goto fail_free_pio_data; | |
8960 | ||
26de7988 | 8961 | if (irqchip_in_kernel(vcpu->kvm)) { |
e9b11c17 ZX |
8962 | r = kvm_create_lapic(vcpu); |
8963 | if (r < 0) | |
8964 | goto fail_mmu_destroy; | |
54e9818f GN |
8965 | } else |
8966 | static_key_slow_inc(&kvm_no_apic_vcpu); | |
e9b11c17 | 8967 | |
890ca9ae HY |
8968 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
8969 | GFP_KERNEL); | |
8970 | if (!vcpu->arch.mce_banks) { | |
8971 | r = -ENOMEM; | |
443c39bc | 8972 | goto fail_free_lapic; |
890ca9ae HY |
8973 | } |
8974 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
8975 | ||
f1797359 WY |
8976 | if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL)) { |
8977 | r = -ENOMEM; | |
f5f48ee1 | 8978 | goto fail_free_mce_banks; |
f1797359 | 8979 | } |
f5f48ee1 | 8980 | |
0ee6a517 | 8981 | fx_init(vcpu); |
66f7b72e | 8982 | |
4344ee98 | 8983 | vcpu->arch.guest_xstate_size = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET; |
d7876f1b | 8984 | |
5a4f55cd EK |
8985 | vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu); |
8986 | ||
74545705 RK |
8987 | vcpu->arch.pat = MSR_IA32_CR_PAT_DEFAULT; |
8988 | ||
af585b92 | 8989 | kvm_async_pf_hash_reset(vcpu); |
f5132b01 | 8990 | kvm_pmu_init(vcpu); |
af585b92 | 8991 | |
1c1a9ce9 | 8992 | vcpu->arch.pending_external_vector = -1; |
de63ad4c | 8993 | vcpu->arch.preempted_in_kernel = false; |
1c1a9ce9 | 8994 | |
5c919412 AS |
8995 | kvm_hv_vcpu_init(vcpu); |
8996 | ||
e9b11c17 | 8997 | return 0; |
0ee6a517 | 8998 | |
f5f48ee1 SY |
8999 | fail_free_mce_banks: |
9000 | kfree(vcpu->arch.mce_banks); | |
443c39bc WY |
9001 | fail_free_lapic: |
9002 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
9003 | fail_mmu_destroy: |
9004 | kvm_mmu_destroy(vcpu); | |
9005 | fail_free_pio_data: | |
ad312c7c | 9006 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
9007 | fail: |
9008 | return r; | |
9009 | } | |
9010 | ||
9011 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
9012 | { | |
f656ce01 MT |
9013 | int idx; |
9014 | ||
1f4b34f8 | 9015 | kvm_hv_vcpu_uninit(vcpu); |
f5132b01 | 9016 | kvm_pmu_destroy(vcpu); |
36cb93fd | 9017 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 9018 | kvm_free_lapic(vcpu); |
f656ce01 | 9019 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 9020 | kvm_mmu_destroy(vcpu); |
f656ce01 | 9021 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 9022 | free_page((unsigned long)vcpu->arch.pio_data); |
35754c98 | 9023 | if (!lapic_in_kernel(vcpu)) |
54e9818f | 9024 | static_key_slow_dec(&kvm_no_apic_vcpu); |
e9b11c17 | 9025 | } |
d19a9cd2 | 9026 | |
e790d9ef RK |
9027 | void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) |
9028 | { | |
c595ceee | 9029 | vcpu->arch.l1tf_flush_l1d = true; |
ae97a3b8 | 9030 | kvm_x86_ops->sched_in(vcpu, cpu); |
e790d9ef RK |
9031 | } |
9032 | ||
e08b9637 | 9033 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
d19a9cd2 | 9034 | { |
e08b9637 CO |
9035 | if (type) |
9036 | return -EINVAL; | |
9037 | ||
6ef768fa | 9038 | INIT_HLIST_HEAD(&kvm->arch.mask_notifier_list); |
f05e70ac | 9039 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
365c8868 | 9040 | INIT_LIST_HEAD(&kvm->arch.zapped_obsolete_pages); |
4d5c5d0f | 9041 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
e0f0bbc5 | 9042 | atomic_set(&kvm->arch.noncoherent_dma_count, 0); |
d19a9cd2 | 9043 | |
5550af4d SY |
9044 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
9045 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
7a84428a AW |
9046 | /* Reserve bit 1 of irq_sources_bitmap for irqfd-resampler */ |
9047 | set_bit(KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID, | |
9048 | &kvm->arch.irq_sources_bitmap); | |
5550af4d | 9049 | |
038f8c11 | 9050 | raw_spin_lock_init(&kvm->arch.tsc_write_lock); |
1e08ec4a | 9051 | mutex_init(&kvm->arch.apic_map_lock); |
d828199e MT |
9052 | spin_lock_init(&kvm->arch.pvclock_gtod_sync_lock); |
9053 | ||
108b249c | 9054 | kvm->arch.kvmclock_offset = -ktime_get_boot_ns(); |
d828199e | 9055 | pvclock_update_vm_gtod_copy(kvm); |
53f658b3 | 9056 | |
6fbbde9a DS |
9057 | kvm->arch.guest_can_read_msr_platform_info = true; |
9058 | ||
7e44e449 | 9059 | INIT_DELAYED_WORK(&kvm->arch.kvmclock_update_work, kvmclock_update_fn); |
332967a3 | 9060 | INIT_DELAYED_WORK(&kvm->arch.kvmclock_sync_work, kvmclock_sync_fn); |
7e44e449 | 9061 | |
cbc0236a | 9062 | kvm_hv_init_vm(kvm); |
0eb05bf2 | 9063 | kvm_page_track_init(kvm); |
13d268ca | 9064 | kvm_mmu_init_vm(kvm); |
0eb05bf2 | 9065 | |
03543133 SS |
9066 | if (kvm_x86_ops->vm_init) |
9067 | return kvm_x86_ops->vm_init(kvm); | |
9068 | ||
d89f5eff | 9069 | return 0; |
d19a9cd2 ZX |
9070 | } |
9071 | ||
9072 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
9073 | { | |
ec7660cc | 9074 | vcpu_load(vcpu); |
d19a9cd2 ZX |
9075 | kvm_mmu_unload(vcpu); |
9076 | vcpu_put(vcpu); | |
9077 | } | |
9078 | ||
9079 | static void kvm_free_vcpus(struct kvm *kvm) | |
9080 | { | |
9081 | unsigned int i; | |
988a2cae | 9082 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
9083 | |
9084 | /* | |
9085 | * Unpin any mmu pages first. | |
9086 | */ | |
af585b92 GN |
9087 | kvm_for_each_vcpu(i, vcpu, kvm) { |
9088 | kvm_clear_async_pf_completion_queue(vcpu); | |
988a2cae | 9089 | kvm_unload_vcpu_mmu(vcpu); |
af585b92 | 9090 | } |
988a2cae GN |
9091 | kvm_for_each_vcpu(i, vcpu, kvm) |
9092 | kvm_arch_vcpu_free(vcpu); | |
9093 | ||
9094 | mutex_lock(&kvm->lock); | |
9095 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
9096 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 9097 | |
988a2cae GN |
9098 | atomic_set(&kvm->online_vcpus, 0); |
9099 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
9100 | } |
9101 | ||
ad8ba2cd SY |
9102 | void kvm_arch_sync_events(struct kvm *kvm) |
9103 | { | |
332967a3 | 9104 | cancel_delayed_work_sync(&kvm->arch.kvmclock_sync_work); |
7e44e449 | 9105 | cancel_delayed_work_sync(&kvm->arch.kvmclock_update_work); |
aea924f6 | 9106 | kvm_free_pit(kvm); |
ad8ba2cd SY |
9107 | } |
9108 | ||
1d8007bd | 9109 | int __x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size) |
9da0e4d5 PB |
9110 | { |
9111 | int i, r; | |
25188b99 | 9112 | unsigned long hva; |
f0d648bd PB |
9113 | struct kvm_memslots *slots = kvm_memslots(kvm); |
9114 | struct kvm_memory_slot *slot, old; | |
9da0e4d5 PB |
9115 | |
9116 | /* Called with kvm->slots_lock held. */ | |
1d8007bd PB |
9117 | if (WARN_ON(id >= KVM_MEM_SLOTS_NUM)) |
9118 | return -EINVAL; | |
9da0e4d5 | 9119 | |
f0d648bd PB |
9120 | slot = id_to_memslot(slots, id); |
9121 | if (size) { | |
b21629da | 9122 | if (slot->npages) |
f0d648bd PB |
9123 | return -EEXIST; |
9124 | ||
9125 | /* | |
9126 | * MAP_SHARED to prevent internal slot pages from being moved | |
9127 | * by fork()/COW. | |
9128 | */ | |
9129 | hva = vm_mmap(NULL, 0, size, PROT_READ | PROT_WRITE, | |
9130 | MAP_SHARED | MAP_ANONYMOUS, 0); | |
9131 | if (IS_ERR((void *)hva)) | |
9132 | return PTR_ERR((void *)hva); | |
9133 | } else { | |
9134 | if (!slot->npages) | |
9135 | return 0; | |
9136 | ||
9137 | hva = 0; | |
9138 | } | |
9139 | ||
9140 | old = *slot; | |
9da0e4d5 | 9141 | for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) { |
1d8007bd | 9142 | struct kvm_userspace_memory_region m; |
9da0e4d5 | 9143 | |
1d8007bd PB |
9144 | m.slot = id | (i << 16); |
9145 | m.flags = 0; | |
9146 | m.guest_phys_addr = gpa; | |
f0d648bd | 9147 | m.userspace_addr = hva; |
1d8007bd | 9148 | m.memory_size = size; |
9da0e4d5 PB |
9149 | r = __kvm_set_memory_region(kvm, &m); |
9150 | if (r < 0) | |
9151 | return r; | |
9152 | } | |
9153 | ||
103c763c EB |
9154 | if (!size) |
9155 | vm_munmap(old.userspace_addr, old.npages * PAGE_SIZE); | |
f0d648bd | 9156 | |
9da0e4d5 PB |
9157 | return 0; |
9158 | } | |
9159 | EXPORT_SYMBOL_GPL(__x86_set_memory_region); | |
9160 | ||
1d8007bd | 9161 | int x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size) |
9da0e4d5 PB |
9162 | { |
9163 | int r; | |
9164 | ||
9165 | mutex_lock(&kvm->slots_lock); | |
1d8007bd | 9166 | r = __x86_set_memory_region(kvm, id, gpa, size); |
9da0e4d5 PB |
9167 | mutex_unlock(&kvm->slots_lock); |
9168 | ||
9169 | return r; | |
9170 | } | |
9171 | EXPORT_SYMBOL_GPL(x86_set_memory_region); | |
9172 | ||
d19a9cd2 ZX |
9173 | void kvm_arch_destroy_vm(struct kvm *kvm) |
9174 | { | |
27469d29 AH |
9175 | if (current->mm == kvm->mm) { |
9176 | /* | |
9177 | * Free memory regions allocated on behalf of userspace, | |
9178 | * unless the the memory map has changed due to process exit | |
9179 | * or fd copying. | |
9180 | */ | |
1d8007bd PB |
9181 | x86_set_memory_region(kvm, APIC_ACCESS_PAGE_PRIVATE_MEMSLOT, 0, 0); |
9182 | x86_set_memory_region(kvm, IDENTITY_PAGETABLE_PRIVATE_MEMSLOT, 0, 0); | |
9183 | x86_set_memory_region(kvm, TSS_PRIVATE_MEMSLOT, 0, 0); | |
27469d29 | 9184 | } |
03543133 SS |
9185 | if (kvm_x86_ops->vm_destroy) |
9186 | kvm_x86_ops->vm_destroy(kvm); | |
c761159c PX |
9187 | kvm_pic_destroy(kvm); |
9188 | kvm_ioapic_destroy(kvm); | |
d19a9cd2 | 9189 | kvm_free_vcpus(kvm); |
af1bae54 | 9190 | kvfree(rcu_dereference_check(kvm->arch.apic_map, 1)); |
13d268ca | 9191 | kvm_mmu_uninit_vm(kvm); |
2beb6dad | 9192 | kvm_page_track_cleanup(kvm); |
cbc0236a | 9193 | kvm_hv_destroy_vm(kvm); |
d19a9cd2 | 9194 | } |
0de10343 | 9195 | |
5587027c | 9196 | void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, |
db3fe4eb TY |
9197 | struct kvm_memory_slot *dont) |
9198 | { | |
9199 | int i; | |
9200 | ||
d89cc617 TY |
9201 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
9202 | if (!dont || free->arch.rmap[i] != dont->arch.rmap[i]) { | |
548ef284 | 9203 | kvfree(free->arch.rmap[i]); |
d89cc617 | 9204 | free->arch.rmap[i] = NULL; |
77d11309 | 9205 | } |
d89cc617 TY |
9206 | if (i == 0) |
9207 | continue; | |
9208 | ||
9209 | if (!dont || free->arch.lpage_info[i - 1] != | |
9210 | dont->arch.lpage_info[i - 1]) { | |
548ef284 | 9211 | kvfree(free->arch.lpage_info[i - 1]); |
d89cc617 | 9212 | free->arch.lpage_info[i - 1] = NULL; |
db3fe4eb TY |
9213 | } |
9214 | } | |
21ebbeda XG |
9215 | |
9216 | kvm_page_track_free_memslot(free, dont); | |
db3fe4eb TY |
9217 | } |
9218 | ||
5587027c AK |
9219 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
9220 | unsigned long npages) | |
db3fe4eb TY |
9221 | { |
9222 | int i; | |
9223 | ||
d89cc617 | 9224 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
92f94f1e | 9225 | struct kvm_lpage_info *linfo; |
db3fe4eb TY |
9226 | unsigned long ugfn; |
9227 | int lpages; | |
d89cc617 | 9228 | int level = i + 1; |
db3fe4eb TY |
9229 | |
9230 | lpages = gfn_to_index(slot->base_gfn + npages - 1, | |
9231 | slot->base_gfn, level) + 1; | |
9232 | ||
d89cc617 | 9233 | slot->arch.rmap[i] = |
778e1cdd KC |
9234 | kvcalloc(lpages, sizeof(*slot->arch.rmap[i]), |
9235 | GFP_KERNEL); | |
d89cc617 | 9236 | if (!slot->arch.rmap[i]) |
77d11309 | 9237 | goto out_free; |
d89cc617 TY |
9238 | if (i == 0) |
9239 | continue; | |
77d11309 | 9240 | |
778e1cdd | 9241 | linfo = kvcalloc(lpages, sizeof(*linfo), GFP_KERNEL); |
92f94f1e | 9242 | if (!linfo) |
db3fe4eb TY |
9243 | goto out_free; |
9244 | ||
92f94f1e XG |
9245 | slot->arch.lpage_info[i - 1] = linfo; |
9246 | ||
db3fe4eb | 9247 | if (slot->base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1)) |
92f94f1e | 9248 | linfo[0].disallow_lpage = 1; |
db3fe4eb | 9249 | if ((slot->base_gfn + npages) & (KVM_PAGES_PER_HPAGE(level) - 1)) |
92f94f1e | 9250 | linfo[lpages - 1].disallow_lpage = 1; |
db3fe4eb TY |
9251 | ugfn = slot->userspace_addr >> PAGE_SHIFT; |
9252 | /* | |
9253 | * If the gfn and userspace address are not aligned wrt each | |
9254 | * other, or if explicitly asked to, disable large page | |
9255 | * support for this slot | |
9256 | */ | |
9257 | if ((slot->base_gfn ^ ugfn) & (KVM_PAGES_PER_HPAGE(level) - 1) || | |
9258 | !kvm_largepages_enabled()) { | |
9259 | unsigned long j; | |
9260 | ||
9261 | for (j = 0; j < lpages; ++j) | |
92f94f1e | 9262 | linfo[j].disallow_lpage = 1; |
db3fe4eb TY |
9263 | } |
9264 | } | |
9265 | ||
21ebbeda XG |
9266 | if (kvm_page_track_create_memslot(slot, npages)) |
9267 | goto out_free; | |
9268 | ||
db3fe4eb TY |
9269 | return 0; |
9270 | ||
9271 | out_free: | |
d89cc617 | 9272 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
548ef284 | 9273 | kvfree(slot->arch.rmap[i]); |
d89cc617 TY |
9274 | slot->arch.rmap[i] = NULL; |
9275 | if (i == 0) | |
9276 | continue; | |
9277 | ||
548ef284 | 9278 | kvfree(slot->arch.lpage_info[i - 1]); |
d89cc617 | 9279 | slot->arch.lpage_info[i - 1] = NULL; |
db3fe4eb TY |
9280 | } |
9281 | return -ENOMEM; | |
9282 | } | |
9283 | ||
15f46015 | 9284 | void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) |
e59dbe09 | 9285 | { |
e6dff7d1 TY |
9286 | /* |
9287 | * memslots->generation has been incremented. | |
9288 | * mmio generation may have reached its maximum value. | |
9289 | */ | |
54bf36aa | 9290 | kvm_mmu_invalidate_mmio_sptes(kvm, slots); |
e59dbe09 TY |
9291 | } |
9292 | ||
f7784b8e MT |
9293 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
9294 | struct kvm_memory_slot *memslot, | |
09170a49 | 9295 | const struct kvm_userspace_memory_region *mem, |
7b6195a9 | 9296 | enum kvm_mr_change change) |
0de10343 | 9297 | { |
f7784b8e MT |
9298 | return 0; |
9299 | } | |
9300 | ||
88178fd4 KH |
9301 | static void kvm_mmu_slot_apply_flags(struct kvm *kvm, |
9302 | struct kvm_memory_slot *new) | |
9303 | { | |
9304 | /* Still write protect RO slot */ | |
9305 | if (new->flags & KVM_MEM_READONLY) { | |
9306 | kvm_mmu_slot_remove_write_access(kvm, new); | |
9307 | return; | |
9308 | } | |
9309 | ||
9310 | /* | |
9311 | * Call kvm_x86_ops dirty logging hooks when they are valid. | |
9312 | * | |
9313 | * kvm_x86_ops->slot_disable_log_dirty is called when: | |
9314 | * | |
9315 | * - KVM_MR_CREATE with dirty logging is disabled | |
9316 | * - KVM_MR_FLAGS_ONLY with dirty logging is disabled in new flag | |
9317 | * | |
9318 | * The reason is, in case of PML, we need to set D-bit for any slots | |
9319 | * with dirty logging disabled in order to eliminate unnecessary GPA | |
9320 | * logging in PML buffer (and potential PML buffer full VMEXT). This | |
9321 | * guarantees leaving PML enabled during guest's lifetime won't have | |
9322 | * any additonal overhead from PML when guest is running with dirty | |
9323 | * logging disabled for memory slots. | |
9324 | * | |
9325 | * kvm_x86_ops->slot_enable_log_dirty is called when switching new slot | |
9326 | * to dirty logging mode. | |
9327 | * | |
9328 | * If kvm_x86_ops dirty logging hooks are invalid, use write protect. | |
9329 | * | |
9330 | * In case of write protect: | |
9331 | * | |
9332 | * Write protect all pages for dirty logging. | |
9333 | * | |
9334 | * All the sptes including the large sptes which point to this | |
9335 | * slot are set to readonly. We can not create any new large | |
9336 | * spte on this slot until the end of the logging. | |
9337 | * | |
9338 | * See the comments in fast_page_fault(). | |
9339 | */ | |
9340 | if (new->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
9341 | if (kvm_x86_ops->slot_enable_log_dirty) | |
9342 | kvm_x86_ops->slot_enable_log_dirty(kvm, new); | |
9343 | else | |
9344 | kvm_mmu_slot_remove_write_access(kvm, new); | |
9345 | } else { | |
9346 | if (kvm_x86_ops->slot_disable_log_dirty) | |
9347 | kvm_x86_ops->slot_disable_log_dirty(kvm, new); | |
9348 | } | |
9349 | } | |
9350 | ||
f7784b8e | 9351 | void kvm_arch_commit_memory_region(struct kvm *kvm, |
09170a49 | 9352 | const struct kvm_userspace_memory_region *mem, |
8482644a | 9353 | const struct kvm_memory_slot *old, |
f36f3f28 | 9354 | const struct kvm_memory_slot *new, |
8482644a | 9355 | enum kvm_mr_change change) |
f7784b8e | 9356 | { |
8482644a | 9357 | int nr_mmu_pages = 0; |
f7784b8e | 9358 | |
48c0e4e9 XG |
9359 | if (!kvm->arch.n_requested_mmu_pages) |
9360 | nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); | |
9361 | ||
48c0e4e9 | 9362 | if (nr_mmu_pages) |
0de10343 | 9363 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); |
1c91cad4 | 9364 | |
3ea3b7fa WL |
9365 | /* |
9366 | * Dirty logging tracks sptes in 4k granularity, meaning that large | |
9367 | * sptes have to be split. If live migration is successful, the guest | |
9368 | * in the source machine will be destroyed and large sptes will be | |
9369 | * created in the destination. However, if the guest continues to run | |
9370 | * in the source machine (for example if live migration fails), small | |
9371 | * sptes will remain around and cause bad performance. | |
9372 | * | |
9373 | * Scan sptes if dirty logging has been stopped, dropping those | |
9374 | * which can be collapsed into a single large-page spte. Later | |
9375 | * page faults will create the large-page sptes. | |
9376 | */ | |
9377 | if ((change != KVM_MR_DELETE) && | |
9378 | (old->flags & KVM_MEM_LOG_DIRTY_PAGES) && | |
9379 | !(new->flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
9380 | kvm_mmu_zap_collapsible_sptes(kvm, new); | |
9381 | ||
c972f3b1 | 9382 | /* |
88178fd4 | 9383 | * Set up write protection and/or dirty logging for the new slot. |
c126d94f | 9384 | * |
88178fd4 KH |
9385 | * For KVM_MR_DELETE and KVM_MR_MOVE, the shadow pages of old slot have |
9386 | * been zapped so no dirty logging staff is needed for old slot. For | |
9387 | * KVM_MR_FLAGS_ONLY, the old slot is essentially the same one as the | |
9388 | * new and it's also covered when dealing with the new slot. | |
f36f3f28 PB |
9389 | * |
9390 | * FIXME: const-ify all uses of struct kvm_memory_slot. | |
c972f3b1 | 9391 | */ |
88178fd4 | 9392 | if (change != KVM_MR_DELETE) |
f36f3f28 | 9393 | kvm_mmu_slot_apply_flags(kvm, (struct kvm_memory_slot *) new); |
0de10343 | 9394 | } |
1d737c8a | 9395 | |
2df72e9b | 9396 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
34d4cb8f | 9397 | { |
6ca18b69 | 9398 | kvm_mmu_invalidate_zap_all_pages(kvm); |
34d4cb8f MT |
9399 | } |
9400 | ||
2df72e9b MT |
9401 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
9402 | struct kvm_memory_slot *slot) | |
9403 | { | |
ae7cd873 | 9404 | kvm_page_track_flush_slot(kvm, slot); |
2df72e9b MT |
9405 | } |
9406 | ||
e6c67d8c LA |
9407 | static inline bool kvm_guest_apic_has_interrupt(struct kvm_vcpu *vcpu) |
9408 | { | |
9409 | return (is_guest_mode(vcpu) && | |
9410 | kvm_x86_ops->guest_apic_has_interrupt && | |
9411 | kvm_x86_ops->guest_apic_has_interrupt(vcpu)); | |
9412 | } | |
9413 | ||
5d9bc648 PB |
9414 | static inline bool kvm_vcpu_has_events(struct kvm_vcpu *vcpu) |
9415 | { | |
9416 | if (!list_empty_careful(&vcpu->async_pf.done)) | |
9417 | return true; | |
9418 | ||
9419 | if (kvm_apic_has_events(vcpu)) | |
9420 | return true; | |
9421 | ||
9422 | if (vcpu->arch.pv.pv_unhalted) | |
9423 | return true; | |
9424 | ||
a5f01f8e WL |
9425 | if (vcpu->arch.exception.pending) |
9426 | return true; | |
9427 | ||
47a66eed Z |
9428 | if (kvm_test_request(KVM_REQ_NMI, vcpu) || |
9429 | (vcpu->arch.nmi_pending && | |
9430 | kvm_x86_ops->nmi_allowed(vcpu))) | |
5d9bc648 PB |
9431 | return true; |
9432 | ||
47a66eed Z |
9433 | if (kvm_test_request(KVM_REQ_SMI, vcpu) || |
9434 | (vcpu->arch.smi_pending && !is_smm(vcpu))) | |
73917739 PB |
9435 | return true; |
9436 | ||
5d9bc648 | 9437 | if (kvm_arch_interrupt_allowed(vcpu) && |
e6c67d8c LA |
9438 | (kvm_cpu_has_interrupt(vcpu) || |
9439 | kvm_guest_apic_has_interrupt(vcpu))) | |
5d9bc648 PB |
9440 | return true; |
9441 | ||
1f4b34f8 AS |
9442 | if (kvm_hv_has_stimer_pending(vcpu)) |
9443 | return true; | |
9444 | ||
5d9bc648 PB |
9445 | return false; |
9446 | } | |
9447 | ||
1d737c8a ZX |
9448 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
9449 | { | |
5d9bc648 | 9450 | return kvm_vcpu_running(vcpu) || kvm_vcpu_has_events(vcpu); |
1d737c8a | 9451 | } |
5736199a | 9452 | |
199b5763 LM |
9453 | bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu) |
9454 | { | |
de63ad4c | 9455 | return vcpu->arch.preempted_in_kernel; |
199b5763 LM |
9456 | } |
9457 | ||
b6d33834 | 9458 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
5736199a | 9459 | { |
b6d33834 | 9460 | return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; |
5736199a | 9461 | } |
78646121 GN |
9462 | |
9463 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
9464 | { | |
9465 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
9466 | } | |
229456fc | 9467 | |
82b32774 | 9468 | unsigned long kvm_get_linear_rip(struct kvm_vcpu *vcpu) |
f92653ee | 9469 | { |
82b32774 NA |
9470 | if (is_64_bit_mode(vcpu)) |
9471 | return kvm_rip_read(vcpu); | |
9472 | return (u32)(get_segment_base(vcpu, VCPU_SREG_CS) + | |
9473 | kvm_rip_read(vcpu)); | |
9474 | } | |
9475 | EXPORT_SYMBOL_GPL(kvm_get_linear_rip); | |
f92653ee | 9476 | |
82b32774 NA |
9477 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
9478 | { | |
9479 | return kvm_get_linear_rip(vcpu) == linear_rip; | |
f92653ee JK |
9480 | } |
9481 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); | |
9482 | ||
94fe45da JK |
9483 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
9484 | { | |
9485 | unsigned long rflags; | |
9486 | ||
9487 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
9488 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
c310bac5 | 9489 | rflags &= ~X86_EFLAGS_TF; |
94fe45da JK |
9490 | return rflags; |
9491 | } | |
9492 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
9493 | ||
6addfc42 | 9494 | static void __kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) |
94fe45da JK |
9495 | { |
9496 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
f92653ee | 9497 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
c310bac5 | 9498 | rflags |= X86_EFLAGS_TF; |
94fe45da | 9499 | kvm_x86_ops->set_rflags(vcpu, rflags); |
6addfc42 PB |
9500 | } |
9501 | ||
9502 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
9503 | { | |
9504 | __kvm_set_rflags(vcpu, rflags); | |
3842d135 | 9505 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
94fe45da JK |
9506 | } |
9507 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
9508 | ||
56028d08 GN |
9509 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work) |
9510 | { | |
9511 | int r; | |
9512 | ||
44dd3ffa | 9513 | if ((vcpu->arch.mmu->direct_map != work->arch.direct_map) || |
f2e10669 | 9514 | work->wakeup_all) |
56028d08 GN |
9515 | return; |
9516 | ||
9517 | r = kvm_mmu_reload(vcpu); | |
9518 | if (unlikely(r)) | |
9519 | return; | |
9520 | ||
44dd3ffa VK |
9521 | if (!vcpu->arch.mmu->direct_map && |
9522 | work->arch.cr3 != vcpu->arch.mmu->get_cr3(vcpu)) | |
fb67e14f XG |
9523 | return; |
9524 | ||
44dd3ffa | 9525 | vcpu->arch.mmu->page_fault(vcpu, work->gva, 0, true); |
56028d08 GN |
9526 | } |
9527 | ||
af585b92 GN |
9528 | static inline u32 kvm_async_pf_hash_fn(gfn_t gfn) |
9529 | { | |
9530 | return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU)); | |
9531 | } | |
9532 | ||
9533 | static inline u32 kvm_async_pf_next_probe(u32 key) | |
9534 | { | |
9535 | return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1); | |
9536 | } | |
9537 | ||
9538 | static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
9539 | { | |
9540 | u32 key = kvm_async_pf_hash_fn(gfn); | |
9541 | ||
9542 | while (vcpu->arch.apf.gfns[key] != ~0) | |
9543 | key = kvm_async_pf_next_probe(key); | |
9544 | ||
9545 | vcpu->arch.apf.gfns[key] = gfn; | |
9546 | } | |
9547 | ||
9548 | static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn) | |
9549 | { | |
9550 | int i; | |
9551 | u32 key = kvm_async_pf_hash_fn(gfn); | |
9552 | ||
9553 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) && | |
c7d28c24 XG |
9554 | (vcpu->arch.apf.gfns[key] != gfn && |
9555 | vcpu->arch.apf.gfns[key] != ~0); i++) | |
af585b92 GN |
9556 | key = kvm_async_pf_next_probe(key); |
9557 | ||
9558 | return key; | |
9559 | } | |
9560 | ||
9561 | bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
9562 | { | |
9563 | return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn; | |
9564 | } | |
9565 | ||
9566 | static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
9567 | { | |
9568 | u32 i, j, k; | |
9569 | ||
9570 | i = j = kvm_async_pf_gfn_slot(vcpu, gfn); | |
9571 | while (true) { | |
9572 | vcpu->arch.apf.gfns[i] = ~0; | |
9573 | do { | |
9574 | j = kvm_async_pf_next_probe(j); | |
9575 | if (vcpu->arch.apf.gfns[j] == ~0) | |
9576 | return; | |
9577 | k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]); | |
9578 | /* | |
9579 | * k lies cyclically in ]i,j] | |
9580 | * | i.k.j | | |
9581 | * |....j i.k.| or |.k..j i...| | |
9582 | */ | |
9583 | } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j)); | |
9584 | vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j]; | |
9585 | i = j; | |
9586 | } | |
9587 | } | |
9588 | ||
7c90705b GN |
9589 | static int apf_put_user(struct kvm_vcpu *vcpu, u32 val) |
9590 | { | |
4e335d9e PB |
9591 | |
9592 | return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val, | |
9593 | sizeof(val)); | |
7c90705b GN |
9594 | } |
9595 | ||
9a6e7c39 WL |
9596 | static int apf_get_user(struct kvm_vcpu *vcpu, u32 *val) |
9597 | { | |
9598 | ||
9599 | return kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, val, | |
9600 | sizeof(u32)); | |
9601 | } | |
9602 | ||
af585b92 GN |
9603 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
9604 | struct kvm_async_pf *work) | |
9605 | { | |
6389ee94 AK |
9606 | struct x86_exception fault; |
9607 | ||
7c90705b | 9608 | trace_kvm_async_pf_not_present(work->arch.token, work->gva); |
af585b92 | 9609 | kvm_add_async_pf_gfn(vcpu, work->arch.gfn); |
7c90705b GN |
9610 | |
9611 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) || | |
fc5f06fa GN |
9612 | (vcpu->arch.apf.send_user_only && |
9613 | kvm_x86_ops->get_cpl(vcpu) == 0)) | |
7c90705b GN |
9614 | kvm_make_request(KVM_REQ_APF_HALT, vcpu); |
9615 | else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) { | |
6389ee94 AK |
9616 | fault.vector = PF_VECTOR; |
9617 | fault.error_code_valid = true; | |
9618 | fault.error_code = 0; | |
9619 | fault.nested_page_fault = false; | |
9620 | fault.address = work->arch.token; | |
adfe20fb | 9621 | fault.async_page_fault = true; |
6389ee94 | 9622 | kvm_inject_page_fault(vcpu, &fault); |
7c90705b | 9623 | } |
af585b92 GN |
9624 | } |
9625 | ||
9626 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
9627 | struct kvm_async_pf *work) | |
9628 | { | |
6389ee94 | 9629 | struct x86_exception fault; |
9a6e7c39 | 9630 | u32 val; |
6389ee94 | 9631 | |
f2e10669 | 9632 | if (work->wakeup_all) |
7c90705b GN |
9633 | work->arch.token = ~0; /* broadcast wakeup */ |
9634 | else | |
9635 | kvm_del_async_pf_gfn(vcpu, work->arch.gfn); | |
24dccf83 | 9636 | trace_kvm_async_pf_ready(work->arch.token, work->gva); |
7c90705b | 9637 | |
9a6e7c39 WL |
9638 | if (vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED && |
9639 | !apf_get_user(vcpu, &val)) { | |
9640 | if (val == KVM_PV_REASON_PAGE_NOT_PRESENT && | |
9641 | vcpu->arch.exception.pending && | |
9642 | vcpu->arch.exception.nr == PF_VECTOR && | |
9643 | !apf_put_user(vcpu, 0)) { | |
9644 | vcpu->arch.exception.injected = false; | |
9645 | vcpu->arch.exception.pending = false; | |
9646 | vcpu->arch.exception.nr = 0; | |
9647 | vcpu->arch.exception.has_error_code = false; | |
9648 | vcpu->arch.exception.error_code = 0; | |
c851436a JM |
9649 | vcpu->arch.exception.has_payload = false; |
9650 | vcpu->arch.exception.payload = 0; | |
9a6e7c39 WL |
9651 | } else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) { |
9652 | fault.vector = PF_VECTOR; | |
9653 | fault.error_code_valid = true; | |
9654 | fault.error_code = 0; | |
9655 | fault.nested_page_fault = false; | |
9656 | fault.address = work->arch.token; | |
9657 | fault.async_page_fault = true; | |
9658 | kvm_inject_page_fault(vcpu, &fault); | |
9659 | } | |
7c90705b | 9660 | } |
e6d53e3b | 9661 | vcpu->arch.apf.halted = false; |
a4fa1635 | 9662 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
7c90705b GN |
9663 | } |
9664 | ||
9665 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
9666 | { | |
9667 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED)) | |
9668 | return true; | |
9669 | else | |
9bc1f09f | 9670 | return kvm_can_do_async_pf(vcpu); |
af585b92 GN |
9671 | } |
9672 | ||
5544eb9b PB |
9673 | void kvm_arch_start_assignment(struct kvm *kvm) |
9674 | { | |
9675 | atomic_inc(&kvm->arch.assigned_device_count); | |
9676 | } | |
9677 | EXPORT_SYMBOL_GPL(kvm_arch_start_assignment); | |
9678 | ||
9679 | void kvm_arch_end_assignment(struct kvm *kvm) | |
9680 | { | |
9681 | atomic_dec(&kvm->arch.assigned_device_count); | |
9682 | } | |
9683 | EXPORT_SYMBOL_GPL(kvm_arch_end_assignment); | |
9684 | ||
9685 | bool kvm_arch_has_assigned_device(struct kvm *kvm) | |
9686 | { | |
9687 | return atomic_read(&kvm->arch.assigned_device_count); | |
9688 | } | |
9689 | EXPORT_SYMBOL_GPL(kvm_arch_has_assigned_device); | |
9690 | ||
e0f0bbc5 AW |
9691 | void kvm_arch_register_noncoherent_dma(struct kvm *kvm) |
9692 | { | |
9693 | atomic_inc(&kvm->arch.noncoherent_dma_count); | |
9694 | } | |
9695 | EXPORT_SYMBOL_GPL(kvm_arch_register_noncoherent_dma); | |
9696 | ||
9697 | void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm) | |
9698 | { | |
9699 | atomic_dec(&kvm->arch.noncoherent_dma_count); | |
9700 | } | |
9701 | EXPORT_SYMBOL_GPL(kvm_arch_unregister_noncoherent_dma); | |
9702 | ||
9703 | bool kvm_arch_has_noncoherent_dma(struct kvm *kvm) | |
9704 | { | |
9705 | return atomic_read(&kvm->arch.noncoherent_dma_count); | |
9706 | } | |
9707 | EXPORT_SYMBOL_GPL(kvm_arch_has_noncoherent_dma); | |
9708 | ||
14717e20 AW |
9709 | bool kvm_arch_has_irq_bypass(void) |
9710 | { | |
9711 | return kvm_x86_ops->update_pi_irte != NULL; | |
9712 | } | |
9713 | ||
87276880 FW |
9714 | int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons, |
9715 | struct irq_bypass_producer *prod) | |
9716 | { | |
9717 | struct kvm_kernel_irqfd *irqfd = | |
9718 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
9719 | ||
14717e20 | 9720 | irqfd->producer = prod; |
87276880 | 9721 | |
14717e20 AW |
9722 | return kvm_x86_ops->update_pi_irte(irqfd->kvm, |
9723 | prod->irq, irqfd->gsi, 1); | |
87276880 FW |
9724 | } |
9725 | ||
9726 | void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons, | |
9727 | struct irq_bypass_producer *prod) | |
9728 | { | |
9729 | int ret; | |
9730 | struct kvm_kernel_irqfd *irqfd = | |
9731 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
9732 | ||
87276880 FW |
9733 | WARN_ON(irqfd->producer != prod); |
9734 | irqfd->producer = NULL; | |
9735 | ||
9736 | /* | |
9737 | * When producer of consumer is unregistered, we change back to | |
9738 | * remapped mode, so we can re-use the current implementation | |
bb3541f1 | 9739 | * when the irq is masked/disabled or the consumer side (KVM |
87276880 FW |
9740 | * int this case doesn't want to receive the interrupts. |
9741 | */ | |
9742 | ret = kvm_x86_ops->update_pi_irte(irqfd->kvm, prod->irq, irqfd->gsi, 0); | |
9743 | if (ret) | |
9744 | printk(KERN_INFO "irq bypass consumer (token %p) unregistration" | |
9745 | " fails: %d\n", irqfd->consumer.token, ret); | |
9746 | } | |
9747 | ||
9748 | int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq, | |
9749 | uint32_t guest_irq, bool set) | |
9750 | { | |
9751 | if (!kvm_x86_ops->update_pi_irte) | |
9752 | return -EINVAL; | |
9753 | ||
9754 | return kvm_x86_ops->update_pi_irte(kvm, host_irq, guest_irq, set); | |
9755 | } | |
9756 | ||
52004014 FW |
9757 | bool kvm_vector_hashing_enabled(void) |
9758 | { | |
9759 | return vector_hashing; | |
9760 | } | |
9761 | EXPORT_SYMBOL_GPL(kvm_vector_hashing_enabled); | |
9762 | ||
229456fc | 9763 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
931c33b1 | 9764 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_fast_mmio); |
229456fc MT |
9765 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); |
9766 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
9767 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
9768 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 9769 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 9770 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 9771 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 9772 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 9773 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 9774 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
2e554e8d | 9775 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |
489223ed | 9776 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_write_tsc_offset); |
7b46268d | 9777 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ple_window); |
843e4330 | 9778 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pml_full); |
efc64404 | 9779 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pi_irte_update); |
18f40c53 SS |
9780 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_unaccelerated_access); |
9781 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_incomplete_ipi); |