]>
Commit | Line | Data |
---|---|---|
043405e1 CO |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * derived from drivers/kvm/kvm_main.c | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
4d5c5d0f BAY |
7 | * Copyright (C) 2008 Qumranet, Inc. |
8 | * Copyright IBM Corporation, 2008 | |
9611c187 | 9 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
043405e1 CO |
10 | * |
11 | * Authors: | |
12 | * Avi Kivity <avi@qumranet.com> | |
13 | * Yaniv Kamay <yaniv@qumranet.com> | |
4d5c5d0f BAY |
14 | * Amit Shah <amit.shah@qumranet.com> |
15 | * Ben-Ami Yassour <benami@il.ibm.com> | |
043405e1 CO |
16 | * |
17 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
18 | * the COPYING file in the top-level directory. | |
19 | * | |
20 | */ | |
21 | ||
edf88417 | 22 | #include <linux/kvm_host.h> |
313a3dc7 | 23 | #include "irq.h" |
1d737c8a | 24 | #include "mmu.h" |
7837699f | 25 | #include "i8254.h" |
37817f29 | 26 | #include "tss.h" |
5fdbf976 | 27 | #include "kvm_cache_regs.h" |
26eef70c | 28 | #include "x86.h" |
00b27a3e | 29 | #include "cpuid.h" |
474a5bb9 | 30 | #include "pmu.h" |
e83d5887 | 31 | #include "hyperv.h" |
313a3dc7 | 32 | |
18068523 | 33 | #include <linux/clocksource.h> |
4d5c5d0f | 34 | #include <linux/interrupt.h> |
313a3dc7 CO |
35 | #include <linux/kvm.h> |
36 | #include <linux/fs.h> | |
37 | #include <linux/vmalloc.h> | |
1767e931 PG |
38 | #include <linux/export.h> |
39 | #include <linux/moduleparam.h> | |
0de10343 | 40 | #include <linux/mman.h> |
2bacc55c | 41 | #include <linux/highmem.h> |
19de40a8 | 42 | #include <linux/iommu.h> |
62c476c7 | 43 | #include <linux/intel-iommu.h> |
c8076604 | 44 | #include <linux/cpufreq.h> |
18863bdd | 45 | #include <linux/user-return-notifier.h> |
a983fb23 | 46 | #include <linux/srcu.h> |
5a0e3ad6 | 47 | #include <linux/slab.h> |
ff9d07a0 | 48 | #include <linux/perf_event.h> |
7bee342a | 49 | #include <linux/uaccess.h> |
af585b92 | 50 | #include <linux/hash.h> |
a1b60c1c | 51 | #include <linux/pci.h> |
16e8d74d MT |
52 | #include <linux/timekeeper_internal.h> |
53 | #include <linux/pvclock_gtod.h> | |
87276880 FW |
54 | #include <linux/kvm_irqfd.h> |
55 | #include <linux/irqbypass.h> | |
3905f9ad | 56 | #include <linux/sched/stat.h> |
d0ec49d4 | 57 | #include <linux/mem_encrypt.h> |
3905f9ad | 58 | |
aec51dc4 | 59 | #include <trace/events/kvm.h> |
2ed152af | 60 | |
24f1e32c | 61 | #include <asm/debugreg.h> |
d825ed0a | 62 | #include <asm/msr.h> |
a5f61300 | 63 | #include <asm/desc.h> |
890ca9ae | 64 | #include <asm/mce.h> |
f89e32e0 | 65 | #include <linux/kernel_stat.h> |
78f7f1e5 | 66 | #include <asm/fpu/internal.h> /* Ugh! */ |
1d5f066e | 67 | #include <asm/pvclock.h> |
217fc9cf | 68 | #include <asm/div64.h> |
efc64404 | 69 | #include <asm/irq_remapping.h> |
b0c39dc6 | 70 | #include <asm/mshyperv.h> |
0092e434 | 71 | #include <asm/hypervisor.h> |
043405e1 | 72 | |
d1898b73 DH |
73 | #define CREATE_TRACE_POINTS |
74 | #include "trace.h" | |
75 | ||
313a3dc7 | 76 | #define MAX_IO_MSRS 256 |
890ca9ae | 77 | #define KVM_MAX_MCE_BANKS 32 |
c45dcc71 AR |
78 | u64 __read_mostly kvm_mce_cap_supported = MCG_CTL_P | MCG_SER_P; |
79 | EXPORT_SYMBOL_GPL(kvm_mce_cap_supported); | |
890ca9ae | 80 | |
0f65dd70 AK |
81 | #define emul_to_vcpu(ctxt) \ |
82 | container_of(ctxt, struct kvm_vcpu, arch.emulate_ctxt) | |
83 | ||
50a37eb4 JR |
84 | /* EFER defaults: |
85 | * - enable syscall per default because its emulated by KVM | |
86 | * - enable LME and LMA per default on 64 bit KVM | |
87 | */ | |
88 | #ifdef CONFIG_X86_64 | |
1260edbe LJ |
89 | static |
90 | u64 __read_mostly efer_reserved_bits = ~((u64)(EFER_SCE | EFER_LME | EFER_LMA)); | |
50a37eb4 | 91 | #else |
1260edbe | 92 | static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE); |
50a37eb4 | 93 | #endif |
313a3dc7 | 94 | |
ba1389b7 AK |
95 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
96 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 97 | |
c519265f RK |
98 | #define KVM_X2APIC_API_VALID_FLAGS (KVM_X2APIC_API_USE_32BIT_IDS | \ |
99 | KVM_X2APIC_API_DISABLE_BROADCAST_QUIRK) | |
37131313 | 100 | |
cb142eb7 | 101 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
7460fb4a | 102 | static void process_nmi(struct kvm_vcpu *vcpu); |
ee2cd4b7 | 103 | static void enter_smm(struct kvm_vcpu *vcpu); |
6addfc42 | 104 | static void __kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags); |
01643c51 KH |
105 | static void store_regs(struct kvm_vcpu *vcpu); |
106 | static int sync_regs(struct kvm_vcpu *vcpu); | |
674eea0f | 107 | |
893590c7 | 108 | struct kvm_x86_ops *kvm_x86_ops __read_mostly; |
5fdbf976 | 109 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 110 | |
893590c7 | 111 | static bool __read_mostly ignore_msrs = 0; |
476bc001 | 112 | module_param(ignore_msrs, bool, S_IRUGO | S_IWUSR); |
ed85c068 | 113 | |
fab0aa3b EM |
114 | static bool __read_mostly report_ignored_msrs = true; |
115 | module_param(report_ignored_msrs, bool, S_IRUGO | S_IWUSR); | |
116 | ||
9ed96e87 MT |
117 | unsigned int min_timer_period_us = 500; |
118 | module_param(min_timer_period_us, uint, S_IRUGO | S_IWUSR); | |
119 | ||
630994b3 MT |
120 | static bool __read_mostly kvmclock_periodic_sync = true; |
121 | module_param(kvmclock_periodic_sync, bool, S_IRUGO); | |
122 | ||
893590c7 | 123 | bool __read_mostly kvm_has_tsc_control; |
92a1f12d | 124 | EXPORT_SYMBOL_GPL(kvm_has_tsc_control); |
893590c7 | 125 | u32 __read_mostly kvm_max_guest_tsc_khz; |
92a1f12d | 126 | EXPORT_SYMBOL_GPL(kvm_max_guest_tsc_khz); |
bc9b961b HZ |
127 | u8 __read_mostly kvm_tsc_scaling_ratio_frac_bits; |
128 | EXPORT_SYMBOL_GPL(kvm_tsc_scaling_ratio_frac_bits); | |
129 | u64 __read_mostly kvm_max_tsc_scaling_ratio; | |
130 | EXPORT_SYMBOL_GPL(kvm_max_tsc_scaling_ratio); | |
64672c95 YJ |
131 | u64 __read_mostly kvm_default_tsc_scaling_ratio; |
132 | EXPORT_SYMBOL_GPL(kvm_default_tsc_scaling_ratio); | |
92a1f12d | 133 | |
cc578287 | 134 | /* tsc tolerance in parts per million - default to 1/2 of the NTP threshold */ |
893590c7 | 135 | static u32 __read_mostly tsc_tolerance_ppm = 250; |
cc578287 ZA |
136 | module_param(tsc_tolerance_ppm, uint, S_IRUGO | S_IWUSR); |
137 | ||
d0659d94 | 138 | /* lapic timer advance (tscdeadline mode only) in nanoseconds */ |
893590c7 | 139 | unsigned int __read_mostly lapic_timer_advance_ns = 0; |
d0659d94 MT |
140 | module_param(lapic_timer_advance_ns, uint, S_IRUGO | S_IWUSR); |
141 | ||
52004014 FW |
142 | static bool __read_mostly vector_hashing = true; |
143 | module_param(vector_hashing, bool, S_IRUGO); | |
144 | ||
c4ae60e4 LA |
145 | bool __read_mostly enable_vmware_backdoor = false; |
146 | module_param(enable_vmware_backdoor, bool, S_IRUGO); | |
147 | EXPORT_SYMBOL_GPL(enable_vmware_backdoor); | |
148 | ||
6c86eedc WL |
149 | static bool __read_mostly force_emulation_prefix = false; |
150 | module_param(force_emulation_prefix, bool, S_IRUGO); | |
151 | ||
18863bdd AK |
152 | #define KVM_NR_SHARED_MSRS 16 |
153 | ||
154 | struct kvm_shared_msrs_global { | |
155 | int nr; | |
2bf78fa7 | 156 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
157 | }; |
158 | ||
159 | struct kvm_shared_msrs { | |
160 | struct user_return_notifier urn; | |
161 | bool registered; | |
2bf78fa7 SY |
162 | struct kvm_shared_msr_values { |
163 | u64 host; | |
164 | u64 curr; | |
165 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
166 | }; |
167 | ||
168 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
013f6a5d | 169 | static struct kvm_shared_msrs __percpu *shared_msrs; |
18863bdd | 170 | |
417bc304 | 171 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
172 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
173 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
174 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
175 | { "invlpg", VCPU_STAT(invlpg) }, | |
176 | { "exits", VCPU_STAT(exits) }, | |
177 | { "io_exits", VCPU_STAT(io_exits) }, | |
178 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
179 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
180 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 181 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 | 182 | { "halt_exits", VCPU_STAT(halt_exits) }, |
f7819512 | 183 | { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, |
62bea5bf | 184 | { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) }, |
3491caf2 | 185 | { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) }, |
ba1389b7 | 186 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f11c3a8d | 187 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
188 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
189 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
190 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
ba1389b7 AK |
191 | { "fpu_reload", VCPU_STAT(fpu_reload) }, |
192 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
193 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 194 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 195 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
0f1e261e | 196 | { "req_event", VCPU_STAT(req_event) }, |
4cee5764 AK |
197 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
198 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
199 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
200 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
201 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
202 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 203 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 204 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 205 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 206 | { "largepages", VM_STAT(lpages) }, |
f3414bc7 DM |
207 | { "max_mmu_page_hash_collisions", |
208 | VM_STAT(max_mmu_page_hash_collisions) }, | |
417bc304 HB |
209 | { NULL } |
210 | }; | |
211 | ||
2acf923e DC |
212 | u64 __read_mostly host_xcr0; |
213 | ||
b6785def | 214 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt); |
d6aa1000 | 215 | |
af585b92 GN |
216 | static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu) |
217 | { | |
218 | int i; | |
219 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU); i++) | |
220 | vcpu->arch.apf.gfns[i] = ~0; | |
221 | } | |
222 | ||
18863bdd AK |
223 | static void kvm_on_user_return(struct user_return_notifier *urn) |
224 | { | |
225 | unsigned slot; | |
18863bdd AK |
226 | struct kvm_shared_msrs *locals |
227 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 228 | struct kvm_shared_msr_values *values; |
1650b4eb IA |
229 | unsigned long flags; |
230 | ||
231 | /* | |
232 | * Disabling irqs at this point since the following code could be | |
233 | * interrupted and executed through kvm_arch_hardware_disable() | |
234 | */ | |
235 | local_irq_save(flags); | |
236 | if (locals->registered) { | |
237 | locals->registered = false; | |
238 | user_return_notifier_unregister(urn); | |
239 | } | |
240 | local_irq_restore(flags); | |
18863bdd | 241 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { |
2bf78fa7 SY |
242 | values = &locals->values[slot]; |
243 | if (values->host != values->curr) { | |
244 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
245 | values->curr = values->host; | |
18863bdd AK |
246 | } |
247 | } | |
18863bdd AK |
248 | } |
249 | ||
2bf78fa7 | 250 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 251 | { |
18863bdd | 252 | u64 value; |
013f6a5d MT |
253 | unsigned int cpu = smp_processor_id(); |
254 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
18863bdd | 255 | |
2bf78fa7 SY |
256 | /* only read, and nobody should modify it at this time, |
257 | * so don't need lock */ | |
258 | if (slot >= shared_msrs_global.nr) { | |
259 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
260 | return; | |
261 | } | |
262 | rdmsrl_safe(msr, &value); | |
263 | smsr->values[slot].host = value; | |
264 | smsr->values[slot].curr = value; | |
265 | } | |
266 | ||
267 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
268 | { | |
0123be42 | 269 | BUG_ON(slot >= KVM_NR_SHARED_MSRS); |
c847fe88 | 270 | shared_msrs_global.msrs[slot] = msr; |
18863bdd AK |
271 | if (slot >= shared_msrs_global.nr) |
272 | shared_msrs_global.nr = slot + 1; | |
18863bdd AK |
273 | } |
274 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
275 | ||
276 | static void kvm_shared_msr_cpu_online(void) | |
277 | { | |
278 | unsigned i; | |
18863bdd AK |
279 | |
280 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 281 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
282 | } |
283 | ||
8b3c3104 | 284 | int kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd | 285 | { |
013f6a5d MT |
286 | unsigned int cpu = smp_processor_id(); |
287 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
8b3c3104 | 288 | int err; |
18863bdd | 289 | |
2bf78fa7 | 290 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
8b3c3104 | 291 | return 0; |
2bf78fa7 | 292 | smsr->values[slot].curr = value; |
8b3c3104 AH |
293 | err = wrmsrl_safe(shared_msrs_global.msrs[slot], value); |
294 | if (err) | |
295 | return 1; | |
296 | ||
18863bdd AK |
297 | if (!smsr->registered) { |
298 | smsr->urn.on_user_return = kvm_on_user_return; | |
299 | user_return_notifier_register(&smsr->urn); | |
300 | smsr->registered = true; | |
301 | } | |
8b3c3104 | 302 | return 0; |
18863bdd AK |
303 | } |
304 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
305 | ||
13a34e06 | 306 | static void drop_user_return_notifiers(void) |
3548bab5 | 307 | { |
013f6a5d MT |
308 | unsigned int cpu = smp_processor_id(); |
309 | struct kvm_shared_msrs *smsr = per_cpu_ptr(shared_msrs, cpu); | |
3548bab5 AK |
310 | |
311 | if (smsr->registered) | |
312 | kvm_on_user_return(&smsr->urn); | |
313 | } | |
314 | ||
6866b83e CO |
315 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
316 | { | |
8a5a87d9 | 317 | return vcpu->arch.apic_base; |
6866b83e CO |
318 | } |
319 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
320 | ||
58cb628d JK |
321 | int kvm_set_apic_base(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
322 | { | |
323 | u64 old_state = vcpu->arch.apic_base & | |
324 | (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); | |
325 | u64 new_state = msr_info->data & | |
326 | (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE); | |
d6321d49 RK |
327 | u64 reserved_bits = ((~0ULL) << cpuid_maxphyaddr(vcpu)) | 0x2ff | |
328 | (guest_cpuid_has(vcpu, X86_FEATURE_X2APIC) ? 0 : X2APIC_ENABLE); | |
58cb628d | 329 | |
d3802286 JM |
330 | if ((msr_info->data & reserved_bits) || new_state == X2APIC_ENABLE) |
331 | return 1; | |
58cb628d | 332 | if (!msr_info->host_initiated && |
d3802286 | 333 | ((new_state == MSR_IA32_APICBASE_ENABLE && |
58cb628d JK |
334 | old_state == (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE)) || |
335 | (new_state == (MSR_IA32_APICBASE_ENABLE | X2APIC_ENABLE) && | |
336 | old_state == 0))) | |
337 | return 1; | |
338 | ||
339 | kvm_lapic_set_base(vcpu, msr_info->data); | |
340 | return 0; | |
6866b83e CO |
341 | } |
342 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
343 | ||
2605fc21 | 344 | asmlinkage __visible void kvm_spurious_fault(void) |
e3ba45b8 GL |
345 | { |
346 | /* Fault while not rebooting. We want the trace. */ | |
347 | BUG(); | |
348 | } | |
349 | EXPORT_SYMBOL_GPL(kvm_spurious_fault); | |
350 | ||
3fd28fce ED |
351 | #define EXCPT_BENIGN 0 |
352 | #define EXCPT_CONTRIBUTORY 1 | |
353 | #define EXCPT_PF 2 | |
354 | ||
355 | static int exception_class(int vector) | |
356 | { | |
357 | switch (vector) { | |
358 | case PF_VECTOR: | |
359 | return EXCPT_PF; | |
360 | case DE_VECTOR: | |
361 | case TS_VECTOR: | |
362 | case NP_VECTOR: | |
363 | case SS_VECTOR: | |
364 | case GP_VECTOR: | |
365 | return EXCPT_CONTRIBUTORY; | |
366 | default: | |
367 | break; | |
368 | } | |
369 | return EXCPT_BENIGN; | |
370 | } | |
371 | ||
d6e8c854 NA |
372 | #define EXCPT_FAULT 0 |
373 | #define EXCPT_TRAP 1 | |
374 | #define EXCPT_ABORT 2 | |
375 | #define EXCPT_INTERRUPT 3 | |
376 | ||
377 | static int exception_type(int vector) | |
378 | { | |
379 | unsigned int mask; | |
380 | ||
381 | if (WARN_ON(vector > 31 || vector == NMI_VECTOR)) | |
382 | return EXCPT_INTERRUPT; | |
383 | ||
384 | mask = 1 << vector; | |
385 | ||
386 | /* #DB is trap, as instruction watchpoints are handled elsewhere */ | |
387 | if (mask & ((1 << DB_VECTOR) | (1 << BP_VECTOR) | (1 << OF_VECTOR))) | |
388 | return EXCPT_TRAP; | |
389 | ||
390 | if (mask & ((1 << DF_VECTOR) | (1 << MC_VECTOR))) | |
391 | return EXCPT_ABORT; | |
392 | ||
393 | /* Reserved exceptions will result in fault */ | |
394 | return EXCPT_FAULT; | |
395 | } | |
396 | ||
3fd28fce | 397 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, |
ce7ddec4 JR |
398 | unsigned nr, bool has_error, u32 error_code, |
399 | bool reinject) | |
3fd28fce ED |
400 | { |
401 | u32 prev_nr; | |
402 | int class1, class2; | |
403 | ||
3842d135 AK |
404 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
405 | ||
664f8e26 | 406 | if (!vcpu->arch.exception.pending && !vcpu->arch.exception.injected) { |
3fd28fce | 407 | queue: |
3ffb2468 NA |
408 | if (has_error && !is_protmode(vcpu)) |
409 | has_error = false; | |
664f8e26 WL |
410 | if (reinject) { |
411 | /* | |
412 | * On vmentry, vcpu->arch.exception.pending is only | |
413 | * true if an event injection was blocked by | |
414 | * nested_run_pending. In that case, however, | |
415 | * vcpu_enter_guest requests an immediate exit, | |
416 | * and the guest shouldn't proceed far enough to | |
417 | * need reinjection. | |
418 | */ | |
419 | WARN_ON_ONCE(vcpu->arch.exception.pending); | |
420 | vcpu->arch.exception.injected = true; | |
421 | } else { | |
422 | vcpu->arch.exception.pending = true; | |
423 | vcpu->arch.exception.injected = false; | |
424 | } | |
3fd28fce ED |
425 | vcpu->arch.exception.has_error_code = has_error; |
426 | vcpu->arch.exception.nr = nr; | |
427 | vcpu->arch.exception.error_code = error_code; | |
428 | return; | |
429 | } | |
430 | ||
431 | /* to check exception */ | |
432 | prev_nr = vcpu->arch.exception.nr; | |
433 | if (prev_nr == DF_VECTOR) { | |
434 | /* triple fault -> shutdown */ | |
a8eeb04a | 435 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
3fd28fce ED |
436 | return; |
437 | } | |
438 | class1 = exception_class(prev_nr); | |
439 | class2 = exception_class(nr); | |
440 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
441 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
664f8e26 WL |
442 | /* |
443 | * Generate double fault per SDM Table 5-5. Set | |
444 | * exception.pending = true so that the double fault | |
445 | * can trigger a nested vmexit. | |
446 | */ | |
3fd28fce | 447 | vcpu->arch.exception.pending = true; |
664f8e26 | 448 | vcpu->arch.exception.injected = false; |
3fd28fce ED |
449 | vcpu->arch.exception.has_error_code = true; |
450 | vcpu->arch.exception.nr = DF_VECTOR; | |
451 | vcpu->arch.exception.error_code = 0; | |
452 | } else | |
453 | /* replace previous exception with a new one in a hope | |
454 | that instruction re-execution will regenerate lost | |
455 | exception */ | |
456 | goto queue; | |
457 | } | |
458 | ||
298101da AK |
459 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
460 | { | |
ce7ddec4 | 461 | kvm_multiple_exception(vcpu, nr, false, 0, false); |
298101da AK |
462 | } |
463 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
464 | ||
ce7ddec4 JR |
465 | void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
466 | { | |
467 | kvm_multiple_exception(vcpu, nr, false, 0, true); | |
468 | } | |
469 | EXPORT_SYMBOL_GPL(kvm_requeue_exception); | |
470 | ||
6affcbed | 471 | int kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err) |
c3c91fee | 472 | { |
db8fcefa AP |
473 | if (err) |
474 | kvm_inject_gp(vcpu, 0); | |
475 | else | |
6affcbed KH |
476 | return kvm_skip_emulated_instruction(vcpu); |
477 | ||
478 | return 1; | |
db8fcefa AP |
479 | } |
480 | EXPORT_SYMBOL_GPL(kvm_complete_insn_gp); | |
8df25a32 | 481 | |
6389ee94 | 482 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
c3c91fee AK |
483 | { |
484 | ++vcpu->stat.pf_guest; | |
adfe20fb WL |
485 | vcpu->arch.exception.nested_apf = |
486 | is_guest_mode(vcpu) && fault->async_page_fault; | |
487 | if (vcpu->arch.exception.nested_apf) | |
488 | vcpu->arch.apf.nested_apf_token = fault->address; | |
489 | else | |
490 | vcpu->arch.cr2 = fault->address; | |
6389ee94 | 491 | kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code); |
c3c91fee | 492 | } |
27d6c865 | 493 | EXPORT_SYMBOL_GPL(kvm_inject_page_fault); |
c3c91fee | 494 | |
ef54bcfe | 495 | static bool kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
d4f8cf66 | 496 | { |
6389ee94 AK |
497 | if (mmu_is_nested(vcpu) && !fault->nested_page_fault) |
498 | vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault); | |
d4f8cf66 | 499 | else |
6389ee94 | 500 | vcpu->arch.mmu.inject_page_fault(vcpu, fault); |
ef54bcfe PB |
501 | |
502 | return fault->nested_page_fault; | |
d4f8cf66 JR |
503 | } |
504 | ||
3419ffc8 SY |
505 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
506 | { | |
7460fb4a AK |
507 | atomic_inc(&vcpu->arch.nmi_queued); |
508 | kvm_make_request(KVM_REQ_NMI, vcpu); | |
3419ffc8 SY |
509 | } |
510 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
511 | ||
298101da AK |
512 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
513 | { | |
ce7ddec4 | 514 | kvm_multiple_exception(vcpu, nr, true, error_code, false); |
298101da AK |
515 | } |
516 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
517 | ||
ce7ddec4 JR |
518 | void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
519 | { | |
520 | kvm_multiple_exception(vcpu, nr, true, error_code, true); | |
521 | } | |
522 | EXPORT_SYMBOL_GPL(kvm_requeue_exception_e); | |
523 | ||
0a79b009 AK |
524 | /* |
525 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
526 | * a #GP and return false. | |
527 | */ | |
528 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 529 | { |
0a79b009 AK |
530 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
531 | return true; | |
532 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
533 | return false; | |
298101da | 534 | } |
0a79b009 | 535 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 536 | |
16f8a6f9 NA |
537 | bool kvm_require_dr(struct kvm_vcpu *vcpu, int dr) |
538 | { | |
539 | if ((dr != 4 && dr != 5) || !kvm_read_cr4_bits(vcpu, X86_CR4_DE)) | |
540 | return true; | |
541 | ||
542 | kvm_queue_exception(vcpu, UD_VECTOR); | |
543 | return false; | |
544 | } | |
545 | EXPORT_SYMBOL_GPL(kvm_require_dr); | |
546 | ||
ec92fe44 JR |
547 | /* |
548 | * This function will be used to read from the physical memory of the currently | |
54bf36aa | 549 | * running guest. The difference to kvm_vcpu_read_guest_page is that this function |
ec92fe44 JR |
550 | * can read from guest physical or from the guest's guest physical memory. |
551 | */ | |
552 | int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, | |
553 | gfn_t ngfn, void *data, int offset, int len, | |
554 | u32 access) | |
555 | { | |
54987b7a | 556 | struct x86_exception exception; |
ec92fe44 JR |
557 | gfn_t real_gfn; |
558 | gpa_t ngpa; | |
559 | ||
560 | ngpa = gfn_to_gpa(ngfn); | |
54987b7a | 561 | real_gfn = mmu->translate_gpa(vcpu, ngpa, access, &exception); |
ec92fe44 JR |
562 | if (real_gfn == UNMAPPED_GVA) |
563 | return -EFAULT; | |
564 | ||
565 | real_gfn = gpa_to_gfn(real_gfn); | |
566 | ||
54bf36aa | 567 | return kvm_vcpu_read_guest_page(vcpu, real_gfn, data, offset, len); |
ec92fe44 JR |
568 | } |
569 | EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu); | |
570 | ||
69b0049a | 571 | static int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, |
3d06b8bf JR |
572 | void *data, int offset, int len, u32 access) |
573 | { | |
574 | return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn, | |
575 | data, offset, len, access); | |
576 | } | |
577 | ||
a03490ed CO |
578 | /* |
579 | * Load the pae pdptrs. Return true is they are all valid. | |
580 | */ | |
ff03a073 | 581 | int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3) |
a03490ed CO |
582 | { |
583 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
584 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
585 | int i; | |
586 | int ret; | |
ff03a073 | 587 | u64 pdpte[ARRAY_SIZE(mmu->pdptrs)]; |
a03490ed | 588 | |
ff03a073 JR |
589 | ret = kvm_read_guest_page_mmu(vcpu, mmu, pdpt_gfn, pdpte, |
590 | offset * sizeof(u64), sizeof(pdpte), | |
591 | PFERR_USER_MASK|PFERR_WRITE_MASK); | |
a03490ed CO |
592 | if (ret < 0) { |
593 | ret = 0; | |
594 | goto out; | |
595 | } | |
596 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
812f30b2 | 597 | if ((pdpte[i] & PT_PRESENT_MASK) && |
a0a64f50 XG |
598 | (pdpte[i] & |
599 | vcpu->arch.mmu.guest_rsvd_check.rsvd_bits_mask[0][2])) { | |
a03490ed CO |
600 | ret = 0; |
601 | goto out; | |
602 | } | |
603 | } | |
604 | ret = 1; | |
605 | ||
ff03a073 | 606 | memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs)); |
6de4f3ad AK |
607 | __set_bit(VCPU_EXREG_PDPTR, |
608 | (unsigned long *)&vcpu->arch.regs_avail); | |
609 | __set_bit(VCPU_EXREG_PDPTR, | |
610 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 611 | out: |
a03490ed CO |
612 | |
613 | return ret; | |
614 | } | |
cc4b6871 | 615 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 616 | |
9ed38ffa | 617 | bool pdptrs_changed(struct kvm_vcpu *vcpu) |
d835dfec | 618 | { |
ff03a073 | 619 | u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)]; |
d835dfec | 620 | bool changed = true; |
3d06b8bf JR |
621 | int offset; |
622 | gfn_t gfn; | |
d835dfec AK |
623 | int r; |
624 | ||
625 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
626 | return false; | |
627 | ||
6de4f3ad AK |
628 | if (!test_bit(VCPU_EXREG_PDPTR, |
629 | (unsigned long *)&vcpu->arch.regs_avail)) | |
630 | return true; | |
631 | ||
a512177e PB |
632 | gfn = (kvm_read_cr3(vcpu) & 0xffffffe0ul) >> PAGE_SHIFT; |
633 | offset = (kvm_read_cr3(vcpu) & 0xffffffe0ul) & (PAGE_SIZE - 1); | |
3d06b8bf JR |
634 | r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte), |
635 | PFERR_USER_MASK | PFERR_WRITE_MASK); | |
d835dfec AK |
636 | if (r < 0) |
637 | goto out; | |
ff03a073 | 638 | changed = memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 639 | out: |
d835dfec AK |
640 | |
641 | return changed; | |
642 | } | |
9ed38ffa | 643 | EXPORT_SYMBOL_GPL(pdptrs_changed); |
d835dfec | 644 | |
49a9b07e | 645 | int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed | 646 | { |
aad82703 | 647 | unsigned long old_cr0 = kvm_read_cr0(vcpu); |
d81135a5 | 648 | unsigned long update_bits = X86_CR0_PG | X86_CR0_WP; |
aad82703 | 649 | |
f9a48e6a AK |
650 | cr0 |= X86_CR0_ET; |
651 | ||
ab344828 | 652 | #ifdef CONFIG_X86_64 |
0f12244f GN |
653 | if (cr0 & 0xffffffff00000000UL) |
654 | return 1; | |
ab344828 GN |
655 | #endif |
656 | ||
657 | cr0 &= ~CR0_RESERVED_BITS; | |
a03490ed | 658 | |
0f12244f GN |
659 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) |
660 | return 1; | |
a03490ed | 661 | |
0f12244f GN |
662 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) |
663 | return 1; | |
a03490ed CO |
664 | |
665 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
666 | #ifdef CONFIG_X86_64 | |
f6801dff | 667 | if ((vcpu->arch.efer & EFER_LME)) { |
a03490ed CO |
668 | int cs_db, cs_l; |
669 | ||
0f12244f GN |
670 | if (!is_pae(vcpu)) |
671 | return 1; | |
a03490ed | 672 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
0f12244f GN |
673 | if (cs_l) |
674 | return 1; | |
a03490ed CO |
675 | } else |
676 | #endif | |
ff03a073 | 677 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
9f8fe504 | 678 | kvm_read_cr3(vcpu))) |
0f12244f | 679 | return 1; |
a03490ed CO |
680 | } |
681 | ||
ad756a16 MJ |
682 | if (!(cr0 & X86_CR0_PG) && kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE)) |
683 | return 1; | |
684 | ||
a03490ed | 685 | kvm_x86_ops->set_cr0(vcpu, cr0); |
a03490ed | 686 | |
d170c419 | 687 | if ((cr0 ^ old_cr0) & X86_CR0_PG) { |
e5f3f027 | 688 | kvm_clear_async_pf_completion_queue(vcpu); |
d170c419 LJ |
689 | kvm_async_pf_hash_reset(vcpu); |
690 | } | |
e5f3f027 | 691 | |
aad82703 SY |
692 | if ((cr0 ^ old_cr0) & update_bits) |
693 | kvm_mmu_reset_context(vcpu); | |
b18d5431 | 694 | |
879ae188 LE |
695 | if (((cr0 ^ old_cr0) & X86_CR0_CD) && |
696 | kvm_arch_has_noncoherent_dma(vcpu->kvm) && | |
697 | !kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED)) | |
b18d5431 XG |
698 | kvm_zap_gfn_range(vcpu->kvm, 0, ~0ULL); |
699 | ||
0f12244f GN |
700 | return 0; |
701 | } | |
2d3ad1f4 | 702 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 703 | |
2d3ad1f4 | 704 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 705 | { |
49a9b07e | 706 | (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f)); |
a03490ed | 707 | } |
2d3ad1f4 | 708 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 709 | |
42bdf991 MT |
710 | static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu) |
711 | { | |
712 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) && | |
713 | !vcpu->guest_xcr0_loaded) { | |
714 | /* kvm_set_xcr() also depends on this */ | |
476b7ada PB |
715 | if (vcpu->arch.xcr0 != host_xcr0) |
716 | xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0); | |
42bdf991 MT |
717 | vcpu->guest_xcr0_loaded = 1; |
718 | } | |
719 | } | |
720 | ||
721 | static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu) | |
722 | { | |
723 | if (vcpu->guest_xcr0_loaded) { | |
724 | if (vcpu->arch.xcr0 != host_xcr0) | |
725 | xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0); | |
726 | vcpu->guest_xcr0_loaded = 0; | |
727 | } | |
728 | } | |
729 | ||
69b0049a | 730 | static int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) |
2acf923e | 731 | { |
56c103ec LJ |
732 | u64 xcr0 = xcr; |
733 | u64 old_xcr0 = vcpu->arch.xcr0; | |
46c34cb0 | 734 | u64 valid_bits; |
2acf923e DC |
735 | |
736 | /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */ | |
737 | if (index != XCR_XFEATURE_ENABLED_MASK) | |
738 | return 1; | |
d91cab78 | 739 | if (!(xcr0 & XFEATURE_MASK_FP)) |
2acf923e | 740 | return 1; |
d91cab78 | 741 | if ((xcr0 & XFEATURE_MASK_YMM) && !(xcr0 & XFEATURE_MASK_SSE)) |
2acf923e | 742 | return 1; |
46c34cb0 PB |
743 | |
744 | /* | |
745 | * Do not allow the guest to set bits that we do not support | |
746 | * saving. However, xcr0 bit 0 is always set, even if the | |
747 | * emulated CPU does not support XSAVE (see fx_init). | |
748 | */ | |
d91cab78 | 749 | valid_bits = vcpu->arch.guest_supported_xcr0 | XFEATURE_MASK_FP; |
46c34cb0 | 750 | if (xcr0 & ~valid_bits) |
2acf923e | 751 | return 1; |
46c34cb0 | 752 | |
d91cab78 DH |
753 | if ((!(xcr0 & XFEATURE_MASK_BNDREGS)) != |
754 | (!(xcr0 & XFEATURE_MASK_BNDCSR))) | |
390bd528 LJ |
755 | return 1; |
756 | ||
d91cab78 DH |
757 | if (xcr0 & XFEATURE_MASK_AVX512) { |
758 | if (!(xcr0 & XFEATURE_MASK_YMM)) | |
612263b3 | 759 | return 1; |
d91cab78 | 760 | if ((xcr0 & XFEATURE_MASK_AVX512) != XFEATURE_MASK_AVX512) |
612263b3 CP |
761 | return 1; |
762 | } | |
2acf923e | 763 | vcpu->arch.xcr0 = xcr0; |
56c103ec | 764 | |
d91cab78 | 765 | if ((xcr0 ^ old_xcr0) & XFEATURE_MASK_EXTEND) |
56c103ec | 766 | kvm_update_cpuid(vcpu); |
2acf923e DC |
767 | return 0; |
768 | } | |
769 | ||
770 | int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) | |
771 | { | |
764bcbc5 Z |
772 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || |
773 | __kvm_set_xcr(vcpu, index, xcr)) { | |
2acf923e DC |
774 | kvm_inject_gp(vcpu, 0); |
775 | return 1; | |
776 | } | |
777 | return 0; | |
778 | } | |
779 | EXPORT_SYMBOL_GPL(kvm_set_xcr); | |
780 | ||
a83b29c6 | 781 | int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 782 | { |
fc78f519 | 783 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
0be0226f | 784 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE | |
b9baba86 | 785 | X86_CR4_SMEP | X86_CR4_SMAP | X86_CR4_PKE; |
0be0226f | 786 | |
0f12244f GN |
787 | if (cr4 & CR4_RESERVED_BITS) |
788 | return 1; | |
a03490ed | 789 | |
d6321d49 | 790 | if (!guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) && (cr4 & X86_CR4_OSXSAVE)) |
2acf923e DC |
791 | return 1; |
792 | ||
d6321d49 | 793 | if (!guest_cpuid_has(vcpu, X86_FEATURE_SMEP) && (cr4 & X86_CR4_SMEP)) |
2acf923e DC |
794 | return 1; |
795 | ||
d6321d49 | 796 | if (!guest_cpuid_has(vcpu, X86_FEATURE_SMAP) && (cr4 & X86_CR4_SMAP)) |
c68b734f YW |
797 | return 1; |
798 | ||
d6321d49 | 799 | if (!guest_cpuid_has(vcpu, X86_FEATURE_FSGSBASE) && (cr4 & X86_CR4_FSGSBASE)) |
97ec8c06 FW |
800 | return 1; |
801 | ||
d6321d49 | 802 | if (!guest_cpuid_has(vcpu, X86_FEATURE_PKU) && (cr4 & X86_CR4_PKE)) |
74dc2b4f YW |
803 | return 1; |
804 | ||
fd8cb433 | 805 | if (!guest_cpuid_has(vcpu, X86_FEATURE_LA57) && (cr4 & X86_CR4_LA57)) |
b9baba86 HH |
806 | return 1; |
807 | ||
ae3e61e1 PB |
808 | if (!guest_cpuid_has(vcpu, X86_FEATURE_UMIP) && (cr4 & X86_CR4_UMIP)) |
809 | return 1; | |
810 | ||
a03490ed | 811 | if (is_long_mode(vcpu)) { |
0f12244f GN |
812 | if (!(cr4 & X86_CR4_PAE)) |
813 | return 1; | |
a2edf57f AK |
814 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
815 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
9f8fe504 AK |
816 | && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
817 | kvm_read_cr3(vcpu))) | |
0f12244f GN |
818 | return 1; |
819 | ||
ad756a16 | 820 | if ((cr4 & X86_CR4_PCIDE) && !(old_cr4 & X86_CR4_PCIDE)) { |
d6321d49 | 821 | if (!guest_cpuid_has(vcpu, X86_FEATURE_PCID)) |
ad756a16 MJ |
822 | return 1; |
823 | ||
824 | /* PCID can not be enabled when cr3[11:0]!=000H or EFER.LMA=0 */ | |
825 | if ((kvm_read_cr3(vcpu) & X86_CR3_PCID_MASK) || !is_long_mode(vcpu)) | |
826 | return 1; | |
827 | } | |
828 | ||
5e1746d6 | 829 | if (kvm_x86_ops->set_cr4(vcpu, cr4)) |
0f12244f | 830 | return 1; |
a03490ed | 831 | |
ad756a16 MJ |
832 | if (((cr4 ^ old_cr4) & pdptr_bits) || |
833 | (!(cr4 & X86_CR4_PCIDE) && (old_cr4 & X86_CR4_PCIDE))) | |
aad82703 | 834 | kvm_mmu_reset_context(vcpu); |
0f12244f | 835 | |
b9baba86 | 836 | if ((cr4 ^ old_cr4) & (X86_CR4_OSXSAVE | X86_CR4_PKE)) |
00b27a3e | 837 | kvm_update_cpuid(vcpu); |
2acf923e | 838 | |
0f12244f GN |
839 | return 0; |
840 | } | |
2d3ad1f4 | 841 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 842 | |
2390218b | 843 | int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 844 | { |
ac146235 | 845 | #ifdef CONFIG_X86_64 |
c19986fe JS |
846 | bool pcid_enabled = kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE); |
847 | ||
848 | if (pcid_enabled) | |
849 | cr3 &= ~CR3_PCID_INVD; | |
ac146235 | 850 | #endif |
9d88fca7 | 851 | |
9f8fe504 | 852 | if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) { |
0ba73cda | 853 | kvm_mmu_sync_roots(vcpu); |
77c3913b | 854 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
0f12244f | 855 | return 0; |
d835dfec AK |
856 | } |
857 | ||
d1cd3ce9 | 858 | if (is_long_mode(vcpu) && |
a780a3ea | 859 | (cr3 & rsvd_bits(cpuid_maxphyaddr(vcpu), 63))) |
d1cd3ce9 YZ |
860 | return 1; |
861 | else if (is_pae(vcpu) && is_paging(vcpu) && | |
d9f89b88 | 862 | !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) |
346874c9 | 863 | return 1; |
a03490ed | 864 | |
0f12244f | 865 | vcpu->arch.cr3 = cr3; |
aff48baa | 866 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
d8d173da | 867 | kvm_mmu_new_cr3(vcpu); |
0f12244f GN |
868 | return 0; |
869 | } | |
2d3ad1f4 | 870 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 871 | |
eea1cff9 | 872 | int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed | 873 | { |
0f12244f GN |
874 | if (cr8 & CR8_RESERVED_BITS) |
875 | return 1; | |
35754c98 | 876 | if (lapic_in_kernel(vcpu)) |
a03490ed CO |
877 | kvm_lapic_set_tpr(vcpu, cr8); |
878 | else | |
ad312c7c | 879 | vcpu->arch.cr8 = cr8; |
0f12244f GN |
880 | return 0; |
881 | } | |
2d3ad1f4 | 882 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 883 | |
2d3ad1f4 | 884 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed | 885 | { |
35754c98 | 886 | if (lapic_in_kernel(vcpu)) |
a03490ed CO |
887 | return kvm_lapic_get_cr8(vcpu); |
888 | else | |
ad312c7c | 889 | return vcpu->arch.cr8; |
a03490ed | 890 | } |
2d3ad1f4 | 891 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 892 | |
ae561ede NA |
893 | static void kvm_update_dr0123(struct kvm_vcpu *vcpu) |
894 | { | |
895 | int i; | |
896 | ||
897 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) { | |
898 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
899 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
900 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_RELOAD; | |
901 | } | |
902 | } | |
903 | ||
73aaf249 JK |
904 | static void kvm_update_dr6(struct kvm_vcpu *vcpu) |
905 | { | |
906 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
907 | kvm_x86_ops->set_dr6(vcpu, vcpu->arch.dr6); | |
908 | } | |
909 | ||
c8639010 JK |
910 | static void kvm_update_dr7(struct kvm_vcpu *vcpu) |
911 | { | |
912 | unsigned long dr7; | |
913 | ||
914 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) | |
915 | dr7 = vcpu->arch.guest_debug_dr7; | |
916 | else | |
917 | dr7 = vcpu->arch.dr7; | |
918 | kvm_x86_ops->set_dr7(vcpu, dr7); | |
360b948d PB |
919 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_BP_ENABLED; |
920 | if (dr7 & DR7_BP_EN_MASK) | |
921 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_BP_ENABLED; | |
c8639010 JK |
922 | } |
923 | ||
6f43ed01 NA |
924 | static u64 kvm_dr6_fixed(struct kvm_vcpu *vcpu) |
925 | { | |
926 | u64 fixed = DR6_FIXED_1; | |
927 | ||
d6321d49 | 928 | if (!guest_cpuid_has(vcpu, X86_FEATURE_RTM)) |
6f43ed01 NA |
929 | fixed |= DR6_RTM; |
930 | return fixed; | |
931 | } | |
932 | ||
338dbc97 | 933 | static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
020df079 GN |
934 | { |
935 | switch (dr) { | |
936 | case 0 ... 3: | |
937 | vcpu->arch.db[dr] = val; | |
938 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
939 | vcpu->arch.eff_db[dr] = val; | |
940 | break; | |
941 | case 4: | |
020df079 GN |
942 | /* fall through */ |
943 | case 6: | |
338dbc97 GN |
944 | if (val & 0xffffffff00000000ULL) |
945 | return -1; /* #GP */ | |
6f43ed01 | 946 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | kvm_dr6_fixed(vcpu); |
73aaf249 | 947 | kvm_update_dr6(vcpu); |
020df079 GN |
948 | break; |
949 | case 5: | |
020df079 GN |
950 | /* fall through */ |
951 | default: /* 7 */ | |
338dbc97 GN |
952 | if (val & 0xffffffff00000000ULL) |
953 | return -1; /* #GP */ | |
020df079 | 954 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; |
c8639010 | 955 | kvm_update_dr7(vcpu); |
020df079 GN |
956 | break; |
957 | } | |
958 | ||
959 | return 0; | |
960 | } | |
338dbc97 GN |
961 | |
962 | int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) | |
963 | { | |
16f8a6f9 | 964 | if (__kvm_set_dr(vcpu, dr, val)) { |
338dbc97 | 965 | kvm_inject_gp(vcpu, 0); |
16f8a6f9 NA |
966 | return 1; |
967 | } | |
968 | return 0; | |
338dbc97 | 969 | } |
020df079 GN |
970 | EXPORT_SYMBOL_GPL(kvm_set_dr); |
971 | ||
16f8a6f9 | 972 | int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) |
020df079 GN |
973 | { |
974 | switch (dr) { | |
975 | case 0 ... 3: | |
976 | *val = vcpu->arch.db[dr]; | |
977 | break; | |
978 | case 4: | |
020df079 GN |
979 | /* fall through */ |
980 | case 6: | |
73aaf249 JK |
981 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
982 | *val = vcpu->arch.dr6; | |
983 | else | |
984 | *val = kvm_x86_ops->get_dr6(vcpu); | |
020df079 GN |
985 | break; |
986 | case 5: | |
020df079 GN |
987 | /* fall through */ |
988 | default: /* 7 */ | |
989 | *val = vcpu->arch.dr7; | |
990 | break; | |
991 | } | |
338dbc97 GN |
992 | return 0; |
993 | } | |
020df079 GN |
994 | EXPORT_SYMBOL_GPL(kvm_get_dr); |
995 | ||
022cd0e8 AK |
996 | bool kvm_rdpmc(struct kvm_vcpu *vcpu) |
997 | { | |
998 | u32 ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
999 | u64 data; | |
1000 | int err; | |
1001 | ||
c6702c9d | 1002 | err = kvm_pmu_rdpmc(vcpu, ecx, &data); |
022cd0e8 AK |
1003 | if (err) |
1004 | return err; | |
1005 | kvm_register_write(vcpu, VCPU_REGS_RAX, (u32)data); | |
1006 | kvm_register_write(vcpu, VCPU_REGS_RDX, data >> 32); | |
1007 | return err; | |
1008 | } | |
1009 | EXPORT_SYMBOL_GPL(kvm_rdpmc); | |
1010 | ||
043405e1 CO |
1011 | /* |
1012 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
1013 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
1014 | * | |
1015 | * This list is modified at module load time to reflect the | |
e3267cbb | 1016 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
62ef68bb PB |
1017 | * kvm-specific. Those are put in emulated_msrs; filtering of emulated_msrs |
1018 | * may depend on host virtualization features rather than host cpu features. | |
043405e1 | 1019 | */ |
e3267cbb | 1020 | |
043405e1 CO |
1021 | static u32 msrs_to_save[] = { |
1022 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
8c06585d | 1023 | MSR_STAR, |
043405e1 CO |
1024 | #ifdef CONFIG_X86_64 |
1025 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
1026 | #endif | |
b3897a49 | 1027 | MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA, |
9dbe6cf9 | 1028 | MSR_IA32_FEATURE_CONTROL, MSR_IA32_BNDCFGS, MSR_TSC_AUX, |
d28b387f | 1029 | MSR_IA32_SPEC_CTRL, MSR_IA32_ARCH_CAPABILITIES |
043405e1 CO |
1030 | }; |
1031 | ||
1032 | static unsigned num_msrs_to_save; | |
1033 | ||
62ef68bb PB |
1034 | static u32 emulated_msrs[] = { |
1035 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, | |
1036 | MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW, | |
1037 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, | |
1038 | HV_X64_MSR_TIME_REF_COUNT, HV_X64_MSR_REFERENCE_TSC, | |
72c139ba | 1039 | HV_X64_MSR_TSC_FREQUENCY, HV_X64_MSR_APIC_FREQUENCY, |
e7d9513b AS |
1040 | HV_X64_MSR_CRASH_P0, HV_X64_MSR_CRASH_P1, HV_X64_MSR_CRASH_P2, |
1041 | HV_X64_MSR_CRASH_P3, HV_X64_MSR_CRASH_P4, HV_X64_MSR_CRASH_CTL, | |
e516cebb | 1042 | HV_X64_MSR_RESET, |
11c4b1ca | 1043 | HV_X64_MSR_VP_INDEX, |
9eec50b8 | 1044 | HV_X64_MSR_VP_RUNTIME, |
5c919412 | 1045 | HV_X64_MSR_SCONTROL, |
1f4b34f8 | 1046 | HV_X64_MSR_STIMER0_CONFIG, |
d4abc577 | 1047 | HV_X64_MSR_VP_ASSIST_PAGE, |
a2e164e7 VK |
1048 | HV_X64_MSR_REENLIGHTENMENT_CONTROL, HV_X64_MSR_TSC_EMULATION_CONTROL, |
1049 | HV_X64_MSR_TSC_EMULATION_STATUS, | |
1050 | ||
1051 | MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME, | |
62ef68bb PB |
1052 | MSR_KVM_PV_EOI_EN, |
1053 | ||
ba904635 | 1054 | MSR_IA32_TSC_ADJUST, |
a3e06bbe | 1055 | MSR_IA32_TSCDEADLINE, |
043405e1 | 1056 | MSR_IA32_MISC_ENABLE, |
908e75f3 AK |
1057 | MSR_IA32_MCG_STATUS, |
1058 | MSR_IA32_MCG_CTL, | |
c45dcc71 | 1059 | MSR_IA32_MCG_EXT_CTL, |
64d60670 | 1060 | MSR_IA32_SMBASE, |
52797bf9 | 1061 | MSR_SMI_COUNT, |
db2336a8 KH |
1062 | MSR_PLATFORM_INFO, |
1063 | MSR_MISC_FEATURES_ENABLES, | |
043405e1 CO |
1064 | }; |
1065 | ||
62ef68bb PB |
1066 | static unsigned num_emulated_msrs; |
1067 | ||
801e459a TL |
1068 | /* |
1069 | * List of msr numbers which are used to expose MSR-based features that | |
1070 | * can be used by a hypervisor to validate requested CPU features. | |
1071 | */ | |
1072 | static u32 msr_based_features[] = { | |
1389309c PB |
1073 | MSR_IA32_VMX_BASIC, |
1074 | MSR_IA32_VMX_TRUE_PINBASED_CTLS, | |
1075 | MSR_IA32_VMX_PINBASED_CTLS, | |
1076 | MSR_IA32_VMX_TRUE_PROCBASED_CTLS, | |
1077 | MSR_IA32_VMX_PROCBASED_CTLS, | |
1078 | MSR_IA32_VMX_TRUE_EXIT_CTLS, | |
1079 | MSR_IA32_VMX_EXIT_CTLS, | |
1080 | MSR_IA32_VMX_TRUE_ENTRY_CTLS, | |
1081 | MSR_IA32_VMX_ENTRY_CTLS, | |
1082 | MSR_IA32_VMX_MISC, | |
1083 | MSR_IA32_VMX_CR0_FIXED0, | |
1084 | MSR_IA32_VMX_CR0_FIXED1, | |
1085 | MSR_IA32_VMX_CR4_FIXED0, | |
1086 | MSR_IA32_VMX_CR4_FIXED1, | |
1087 | MSR_IA32_VMX_VMCS_ENUM, | |
1088 | MSR_IA32_VMX_PROCBASED_CTLS2, | |
1089 | MSR_IA32_VMX_EPT_VPID_CAP, | |
1090 | MSR_IA32_VMX_VMFUNC, | |
1091 | ||
d1d93fa9 | 1092 | MSR_F10H_DECFG, |
518e7b94 | 1093 | MSR_IA32_UCODE_REV, |
801e459a TL |
1094 | }; |
1095 | ||
1096 | static unsigned int num_msr_based_features; | |
1097 | ||
66421c1e WL |
1098 | static int kvm_get_msr_feature(struct kvm_msr_entry *msr) |
1099 | { | |
1100 | switch (msr->index) { | |
518e7b94 WL |
1101 | case MSR_IA32_UCODE_REV: |
1102 | rdmsrl(msr->index, msr->data); | |
1103 | break; | |
66421c1e WL |
1104 | default: |
1105 | if (kvm_x86_ops->get_msr_feature(msr)) | |
1106 | return 1; | |
1107 | } | |
1108 | return 0; | |
1109 | } | |
1110 | ||
801e459a TL |
1111 | static int do_get_msr_feature(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1112 | { | |
1113 | struct kvm_msr_entry msr; | |
66421c1e | 1114 | int r; |
801e459a TL |
1115 | |
1116 | msr.index = index; | |
66421c1e WL |
1117 | r = kvm_get_msr_feature(&msr); |
1118 | if (r) | |
1119 | return r; | |
801e459a TL |
1120 | |
1121 | *data = msr.data; | |
1122 | ||
1123 | return 0; | |
1124 | } | |
1125 | ||
384bb783 | 1126 | bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer) |
15c4a640 | 1127 | { |
b69e8cae | 1128 | if (efer & efer_reserved_bits) |
384bb783 | 1129 | return false; |
15c4a640 | 1130 | |
1b4d56b8 | 1131 | if (efer & EFER_FFXSR && !guest_cpuid_has(vcpu, X86_FEATURE_FXSR_OPT)) |
384bb783 | 1132 | return false; |
1b2fd70c | 1133 | |
1b4d56b8 | 1134 | if (efer & EFER_SVME && !guest_cpuid_has(vcpu, X86_FEATURE_SVM)) |
384bb783 | 1135 | return false; |
d8017474 | 1136 | |
384bb783 JK |
1137 | return true; |
1138 | } | |
1139 | EXPORT_SYMBOL_GPL(kvm_valid_efer); | |
1140 | ||
1141 | static int set_efer(struct kvm_vcpu *vcpu, u64 efer) | |
1142 | { | |
1143 | u64 old_efer = vcpu->arch.efer; | |
1144 | ||
1145 | if (!kvm_valid_efer(vcpu, efer)) | |
1146 | return 1; | |
1147 | ||
1148 | if (is_paging(vcpu) | |
1149 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) | |
1150 | return 1; | |
1151 | ||
15c4a640 | 1152 | efer &= ~EFER_LMA; |
f6801dff | 1153 | efer |= vcpu->arch.efer & EFER_LMA; |
15c4a640 | 1154 | |
a3d204e2 SY |
1155 | kvm_x86_ops->set_efer(vcpu, efer); |
1156 | ||
aad82703 SY |
1157 | /* Update reserved bits */ |
1158 | if ((efer ^ old_efer) & EFER_NX) | |
1159 | kvm_mmu_reset_context(vcpu); | |
1160 | ||
b69e8cae | 1161 | return 0; |
15c4a640 CO |
1162 | } |
1163 | ||
f2b4b7dd JR |
1164 | void kvm_enable_efer_bits(u64 mask) |
1165 | { | |
1166 | efer_reserved_bits &= ~mask; | |
1167 | } | |
1168 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
1169 | ||
15c4a640 CO |
1170 | /* |
1171 | * Writes msr value into into the appropriate "register". | |
1172 | * Returns 0 on success, non-0 otherwise. | |
1173 | * Assumes vcpu_load() was already called. | |
1174 | */ | |
8fe8ab46 | 1175 | int kvm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
15c4a640 | 1176 | { |
854e8bb1 NA |
1177 | switch (msr->index) { |
1178 | case MSR_FS_BASE: | |
1179 | case MSR_GS_BASE: | |
1180 | case MSR_KERNEL_GS_BASE: | |
1181 | case MSR_CSTAR: | |
1182 | case MSR_LSTAR: | |
fd8cb433 | 1183 | if (is_noncanonical_address(msr->data, vcpu)) |
854e8bb1 NA |
1184 | return 1; |
1185 | break; | |
1186 | case MSR_IA32_SYSENTER_EIP: | |
1187 | case MSR_IA32_SYSENTER_ESP: | |
1188 | /* | |
1189 | * IA32_SYSENTER_ESP and IA32_SYSENTER_EIP cause #GP if | |
1190 | * non-canonical address is written on Intel but not on | |
1191 | * AMD (which ignores the top 32-bits, because it does | |
1192 | * not implement 64-bit SYSENTER). | |
1193 | * | |
1194 | * 64-bit code should hence be able to write a non-canonical | |
1195 | * value on AMD. Making the address canonical ensures that | |
1196 | * vmentry does not fail on Intel after writing a non-canonical | |
1197 | * value, and that something deterministic happens if the guest | |
1198 | * invokes 64-bit SYSENTER. | |
1199 | */ | |
fd8cb433 | 1200 | msr->data = get_canonical(msr->data, vcpu_virt_addr_bits(vcpu)); |
854e8bb1 | 1201 | } |
8fe8ab46 | 1202 | return kvm_x86_ops->set_msr(vcpu, msr); |
15c4a640 | 1203 | } |
854e8bb1 | 1204 | EXPORT_SYMBOL_GPL(kvm_set_msr); |
15c4a640 | 1205 | |
313a3dc7 CO |
1206 | /* |
1207 | * Adapt set_msr() to msr_io()'s calling convention | |
1208 | */ | |
609e36d3 PB |
1209 | static int do_get_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1210 | { | |
1211 | struct msr_data msr; | |
1212 | int r; | |
1213 | ||
1214 | msr.index = index; | |
1215 | msr.host_initiated = true; | |
1216 | r = kvm_get_msr(vcpu, &msr); | |
1217 | if (r) | |
1218 | return r; | |
1219 | ||
1220 | *data = msr.data; | |
1221 | return 0; | |
1222 | } | |
1223 | ||
313a3dc7 CO |
1224 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) |
1225 | { | |
8fe8ab46 WA |
1226 | struct msr_data msr; |
1227 | ||
1228 | msr.data = *data; | |
1229 | msr.index = index; | |
1230 | msr.host_initiated = true; | |
1231 | return kvm_set_msr(vcpu, &msr); | |
313a3dc7 CO |
1232 | } |
1233 | ||
16e8d74d MT |
1234 | #ifdef CONFIG_X86_64 |
1235 | struct pvclock_gtod_data { | |
1236 | seqcount_t seq; | |
1237 | ||
1238 | struct { /* extract of a clocksource struct */ | |
1239 | int vclock_mode; | |
a5a1d1c2 TG |
1240 | u64 cycle_last; |
1241 | u64 mask; | |
16e8d74d MT |
1242 | u32 mult; |
1243 | u32 shift; | |
1244 | } clock; | |
1245 | ||
cbcf2dd3 TG |
1246 | u64 boot_ns; |
1247 | u64 nsec_base; | |
55dd00a7 | 1248 | u64 wall_time_sec; |
16e8d74d MT |
1249 | }; |
1250 | ||
1251 | static struct pvclock_gtod_data pvclock_gtod_data; | |
1252 | ||
1253 | static void update_pvclock_gtod(struct timekeeper *tk) | |
1254 | { | |
1255 | struct pvclock_gtod_data *vdata = &pvclock_gtod_data; | |
cbcf2dd3 TG |
1256 | u64 boot_ns; |
1257 | ||
876e7881 | 1258 | boot_ns = ktime_to_ns(ktime_add(tk->tkr_mono.base, tk->offs_boot)); |
16e8d74d MT |
1259 | |
1260 | write_seqcount_begin(&vdata->seq); | |
1261 | ||
1262 | /* copy pvclock gtod data */ | |
876e7881 PZ |
1263 | vdata->clock.vclock_mode = tk->tkr_mono.clock->archdata.vclock_mode; |
1264 | vdata->clock.cycle_last = tk->tkr_mono.cycle_last; | |
1265 | vdata->clock.mask = tk->tkr_mono.mask; | |
1266 | vdata->clock.mult = tk->tkr_mono.mult; | |
1267 | vdata->clock.shift = tk->tkr_mono.shift; | |
16e8d74d | 1268 | |
cbcf2dd3 | 1269 | vdata->boot_ns = boot_ns; |
876e7881 | 1270 | vdata->nsec_base = tk->tkr_mono.xtime_nsec; |
16e8d74d | 1271 | |
55dd00a7 MT |
1272 | vdata->wall_time_sec = tk->xtime_sec; |
1273 | ||
16e8d74d MT |
1274 | write_seqcount_end(&vdata->seq); |
1275 | } | |
1276 | #endif | |
1277 | ||
bab5bb39 NK |
1278 | void kvm_set_pending_timer(struct kvm_vcpu *vcpu) |
1279 | { | |
1280 | /* | |
1281 | * Note: KVM_REQ_PENDING_TIMER is implicitly checked in | |
1282 | * vcpu_enter_guest. This function is only called from | |
1283 | * the physical CPU that is running vcpu. | |
1284 | */ | |
1285 | kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); | |
1286 | } | |
16e8d74d | 1287 | |
18068523 GOC |
1288 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
1289 | { | |
9ed3c444 AK |
1290 | int version; |
1291 | int r; | |
50d0a0f9 | 1292 | struct pvclock_wall_clock wc; |
87aeb54f | 1293 | struct timespec64 boot; |
18068523 GOC |
1294 | |
1295 | if (!wall_clock) | |
1296 | return; | |
1297 | ||
9ed3c444 AK |
1298 | r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version)); |
1299 | if (r) | |
1300 | return; | |
1301 | ||
1302 | if (version & 1) | |
1303 | ++version; /* first time write, random junk */ | |
1304 | ||
1305 | ++version; | |
18068523 | 1306 | |
1dab1345 NK |
1307 | if (kvm_write_guest(kvm, wall_clock, &version, sizeof(version))) |
1308 | return; | |
18068523 | 1309 | |
50d0a0f9 GH |
1310 | /* |
1311 | * The guest calculates current wall clock time by adding | |
34c238a1 | 1312 | * system time (updated by kvm_guest_time_update below) to the |
50d0a0f9 GH |
1313 | * wall clock specified here. guest system time equals host |
1314 | * system time for us, thus we must fill in host boot time here. | |
1315 | */ | |
87aeb54f | 1316 | getboottime64(&boot); |
50d0a0f9 | 1317 | |
4b648665 | 1318 | if (kvm->arch.kvmclock_offset) { |
87aeb54f AB |
1319 | struct timespec64 ts = ns_to_timespec64(kvm->arch.kvmclock_offset); |
1320 | boot = timespec64_sub(boot, ts); | |
4b648665 | 1321 | } |
87aeb54f | 1322 | wc.sec = (u32)boot.tv_sec; /* overflow in 2106 guest time */ |
50d0a0f9 GH |
1323 | wc.nsec = boot.tv_nsec; |
1324 | wc.version = version; | |
18068523 GOC |
1325 | |
1326 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
1327 | ||
1328 | version++; | |
1329 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
1330 | } |
1331 | ||
50d0a0f9 GH |
1332 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
1333 | { | |
b51012de PB |
1334 | do_shl32_div32(dividend, divisor); |
1335 | return dividend; | |
50d0a0f9 GH |
1336 | } |
1337 | ||
3ae13faa | 1338 | static void kvm_get_time_scale(uint64_t scaled_hz, uint64_t base_hz, |
5f4e3f88 | 1339 | s8 *pshift, u32 *pmultiplier) |
50d0a0f9 | 1340 | { |
5f4e3f88 | 1341 | uint64_t scaled64; |
50d0a0f9 GH |
1342 | int32_t shift = 0; |
1343 | uint64_t tps64; | |
1344 | uint32_t tps32; | |
1345 | ||
3ae13faa PB |
1346 | tps64 = base_hz; |
1347 | scaled64 = scaled_hz; | |
50933623 | 1348 | while (tps64 > scaled64*2 || tps64 & 0xffffffff00000000ULL) { |
50d0a0f9 GH |
1349 | tps64 >>= 1; |
1350 | shift--; | |
1351 | } | |
1352 | ||
1353 | tps32 = (uint32_t)tps64; | |
50933623 JK |
1354 | while (tps32 <= scaled64 || scaled64 & 0xffffffff00000000ULL) { |
1355 | if (scaled64 & 0xffffffff00000000ULL || tps32 & 0x80000000) | |
5f4e3f88 ZA |
1356 | scaled64 >>= 1; |
1357 | else | |
1358 | tps32 <<= 1; | |
50d0a0f9 GH |
1359 | shift++; |
1360 | } | |
1361 | ||
5f4e3f88 ZA |
1362 | *pshift = shift; |
1363 | *pmultiplier = div_frac(scaled64, tps32); | |
50d0a0f9 | 1364 | |
3ae13faa PB |
1365 | pr_debug("%s: base_hz %llu => %llu, shift %d, mul %u\n", |
1366 | __func__, base_hz, scaled_hz, shift, *pmultiplier); | |
50d0a0f9 GH |
1367 | } |
1368 | ||
d828199e | 1369 | #ifdef CONFIG_X86_64 |
16e8d74d | 1370 | static atomic_t kvm_guest_has_master_clock = ATOMIC_INIT(0); |
d828199e | 1371 | #endif |
16e8d74d | 1372 | |
c8076604 | 1373 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
69b0049a | 1374 | static unsigned long max_tsc_khz; |
c8076604 | 1375 | |
cc578287 | 1376 | static u32 adjust_tsc_khz(u32 khz, s32 ppm) |
1e993611 | 1377 | { |
cc578287 ZA |
1378 | u64 v = (u64)khz * (1000000 + ppm); |
1379 | do_div(v, 1000000); | |
1380 | return v; | |
1e993611 JR |
1381 | } |
1382 | ||
381d585c HZ |
1383 | static int set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale) |
1384 | { | |
1385 | u64 ratio; | |
1386 | ||
1387 | /* Guest TSC same frequency as host TSC? */ | |
1388 | if (!scale) { | |
1389 | vcpu->arch.tsc_scaling_ratio = kvm_default_tsc_scaling_ratio; | |
1390 | return 0; | |
1391 | } | |
1392 | ||
1393 | /* TSC scaling supported? */ | |
1394 | if (!kvm_has_tsc_control) { | |
1395 | if (user_tsc_khz > tsc_khz) { | |
1396 | vcpu->arch.tsc_catchup = 1; | |
1397 | vcpu->arch.tsc_always_catchup = 1; | |
1398 | return 0; | |
1399 | } else { | |
1400 | WARN(1, "user requested TSC rate below hardware speed\n"); | |
1401 | return -1; | |
1402 | } | |
1403 | } | |
1404 | ||
1405 | /* TSC scaling required - calculate ratio */ | |
1406 | ratio = mul_u64_u32_div(1ULL << kvm_tsc_scaling_ratio_frac_bits, | |
1407 | user_tsc_khz, tsc_khz); | |
1408 | ||
1409 | if (ratio == 0 || ratio >= kvm_max_tsc_scaling_ratio) { | |
1410 | WARN_ONCE(1, "Invalid TSC scaling ratio - virtual-tsc-khz=%u\n", | |
1411 | user_tsc_khz); | |
1412 | return -1; | |
1413 | } | |
1414 | ||
1415 | vcpu->arch.tsc_scaling_ratio = ratio; | |
1416 | return 0; | |
1417 | } | |
1418 | ||
4941b8cb | 1419 | static int kvm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz) |
759379dd | 1420 | { |
cc578287 ZA |
1421 | u32 thresh_lo, thresh_hi; |
1422 | int use_scaling = 0; | |
217fc9cf | 1423 | |
03ba32ca | 1424 | /* tsc_khz can be zero if TSC calibration fails */ |
4941b8cb | 1425 | if (user_tsc_khz == 0) { |
ad721883 HZ |
1426 | /* set tsc_scaling_ratio to a safe value */ |
1427 | vcpu->arch.tsc_scaling_ratio = kvm_default_tsc_scaling_ratio; | |
381d585c | 1428 | return -1; |
ad721883 | 1429 | } |
03ba32ca | 1430 | |
c285545f | 1431 | /* Compute a scale to convert nanoseconds in TSC cycles */ |
3ae13faa | 1432 | kvm_get_time_scale(user_tsc_khz * 1000LL, NSEC_PER_SEC, |
cc578287 ZA |
1433 | &vcpu->arch.virtual_tsc_shift, |
1434 | &vcpu->arch.virtual_tsc_mult); | |
4941b8cb | 1435 | vcpu->arch.virtual_tsc_khz = user_tsc_khz; |
cc578287 ZA |
1436 | |
1437 | /* | |
1438 | * Compute the variation in TSC rate which is acceptable | |
1439 | * within the range of tolerance and decide if the | |
1440 | * rate being applied is within that bounds of the hardware | |
1441 | * rate. If so, no scaling or compensation need be done. | |
1442 | */ | |
1443 | thresh_lo = adjust_tsc_khz(tsc_khz, -tsc_tolerance_ppm); | |
1444 | thresh_hi = adjust_tsc_khz(tsc_khz, tsc_tolerance_ppm); | |
4941b8cb PB |
1445 | if (user_tsc_khz < thresh_lo || user_tsc_khz > thresh_hi) { |
1446 | pr_debug("kvm: requested TSC rate %u falls outside tolerance [%u,%u]\n", user_tsc_khz, thresh_lo, thresh_hi); | |
cc578287 ZA |
1447 | use_scaling = 1; |
1448 | } | |
4941b8cb | 1449 | return set_tsc_khz(vcpu, user_tsc_khz, use_scaling); |
c285545f ZA |
1450 | } |
1451 | ||
1452 | static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns) | |
1453 | { | |
e26101b1 | 1454 | u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.this_tsc_nsec, |
cc578287 ZA |
1455 | vcpu->arch.virtual_tsc_mult, |
1456 | vcpu->arch.virtual_tsc_shift); | |
e26101b1 | 1457 | tsc += vcpu->arch.this_tsc_write; |
c285545f ZA |
1458 | return tsc; |
1459 | } | |
1460 | ||
b0c39dc6 VK |
1461 | static inline int gtod_is_based_on_tsc(int mode) |
1462 | { | |
1463 | return mode == VCLOCK_TSC || mode == VCLOCK_HVCLOCK; | |
1464 | } | |
1465 | ||
69b0049a | 1466 | static void kvm_track_tsc_matching(struct kvm_vcpu *vcpu) |
b48aa97e MT |
1467 | { |
1468 | #ifdef CONFIG_X86_64 | |
1469 | bool vcpus_matched; | |
b48aa97e MT |
1470 | struct kvm_arch *ka = &vcpu->kvm->arch; |
1471 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1472 | ||
1473 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1474 | atomic_read(&vcpu->kvm->online_vcpus)); | |
1475 | ||
7f187922 MT |
1476 | /* |
1477 | * Once the masterclock is enabled, always perform request in | |
1478 | * order to update it. | |
1479 | * | |
1480 | * In order to enable masterclock, the host clocksource must be TSC | |
1481 | * and the vcpus need to have matched TSCs. When that happens, | |
1482 | * perform request to enable masterclock. | |
1483 | */ | |
1484 | if (ka->use_master_clock || | |
b0c39dc6 | 1485 | (gtod_is_based_on_tsc(gtod->clock.vclock_mode) && vcpus_matched)) |
b48aa97e MT |
1486 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
1487 | ||
1488 | trace_kvm_track_tsc(vcpu->vcpu_id, ka->nr_vcpus_matched_tsc, | |
1489 | atomic_read(&vcpu->kvm->online_vcpus), | |
1490 | ka->use_master_clock, gtod->clock.vclock_mode); | |
1491 | #endif | |
1492 | } | |
1493 | ||
ba904635 WA |
1494 | static void update_ia32_tsc_adjust_msr(struct kvm_vcpu *vcpu, s64 offset) |
1495 | { | |
e79f245d | 1496 | u64 curr_offset = kvm_x86_ops->read_l1_tsc_offset(vcpu); |
ba904635 WA |
1497 | vcpu->arch.ia32_tsc_adjust_msr += offset - curr_offset; |
1498 | } | |
1499 | ||
35181e86 HZ |
1500 | /* |
1501 | * Multiply tsc by a fixed point number represented by ratio. | |
1502 | * | |
1503 | * The most significant 64-N bits (mult) of ratio represent the | |
1504 | * integral part of the fixed point number; the remaining N bits | |
1505 | * (frac) represent the fractional part, ie. ratio represents a fixed | |
1506 | * point number (mult + frac * 2^(-N)). | |
1507 | * | |
1508 | * N equals to kvm_tsc_scaling_ratio_frac_bits. | |
1509 | */ | |
1510 | static inline u64 __scale_tsc(u64 ratio, u64 tsc) | |
1511 | { | |
1512 | return mul_u64_u64_shr(tsc, ratio, kvm_tsc_scaling_ratio_frac_bits); | |
1513 | } | |
1514 | ||
1515 | u64 kvm_scale_tsc(struct kvm_vcpu *vcpu, u64 tsc) | |
1516 | { | |
1517 | u64 _tsc = tsc; | |
1518 | u64 ratio = vcpu->arch.tsc_scaling_ratio; | |
1519 | ||
1520 | if (ratio != kvm_default_tsc_scaling_ratio) | |
1521 | _tsc = __scale_tsc(ratio, tsc); | |
1522 | ||
1523 | return _tsc; | |
1524 | } | |
1525 | EXPORT_SYMBOL_GPL(kvm_scale_tsc); | |
1526 | ||
07c1419a HZ |
1527 | static u64 kvm_compute_tsc_offset(struct kvm_vcpu *vcpu, u64 target_tsc) |
1528 | { | |
1529 | u64 tsc; | |
1530 | ||
1531 | tsc = kvm_scale_tsc(vcpu, rdtsc()); | |
1532 | ||
1533 | return target_tsc - tsc; | |
1534 | } | |
1535 | ||
4ba76538 HZ |
1536 | u64 kvm_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc) |
1537 | { | |
e79f245d KA |
1538 | u64 tsc_offset = kvm_x86_ops->read_l1_tsc_offset(vcpu); |
1539 | ||
1540 | return tsc_offset + kvm_scale_tsc(vcpu, host_tsc); | |
4ba76538 HZ |
1541 | } |
1542 | EXPORT_SYMBOL_GPL(kvm_read_l1_tsc); | |
1543 | ||
a545ab6a LC |
1544 | static void kvm_vcpu_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) |
1545 | { | |
1546 | kvm_x86_ops->write_tsc_offset(vcpu, offset); | |
1547 | vcpu->arch.tsc_offset = offset; | |
1548 | } | |
1549 | ||
b0c39dc6 VK |
1550 | static inline bool kvm_check_tsc_unstable(void) |
1551 | { | |
1552 | #ifdef CONFIG_X86_64 | |
1553 | /* | |
1554 | * TSC is marked unstable when we're running on Hyper-V, | |
1555 | * 'TSC page' clocksource is good. | |
1556 | */ | |
1557 | if (pvclock_gtod_data.clock.vclock_mode == VCLOCK_HVCLOCK) | |
1558 | return false; | |
1559 | #endif | |
1560 | return check_tsc_unstable(); | |
1561 | } | |
1562 | ||
8fe8ab46 | 1563 | void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr) |
99e3e30a ZA |
1564 | { |
1565 | struct kvm *kvm = vcpu->kvm; | |
f38e098f | 1566 | u64 offset, ns, elapsed; |
99e3e30a | 1567 | unsigned long flags; |
b48aa97e | 1568 | bool matched; |
0d3da0d2 | 1569 | bool already_matched; |
8fe8ab46 | 1570 | u64 data = msr->data; |
c5e8ec8e | 1571 | bool synchronizing = false; |
99e3e30a | 1572 | |
038f8c11 | 1573 | raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags); |
07c1419a | 1574 | offset = kvm_compute_tsc_offset(vcpu, data); |
108b249c | 1575 | ns = ktime_get_boot_ns(); |
f38e098f | 1576 | elapsed = ns - kvm->arch.last_tsc_nsec; |
5d3cb0f6 | 1577 | |
03ba32ca | 1578 | if (vcpu->arch.virtual_tsc_khz) { |
bd8fab39 DP |
1579 | if (data == 0 && msr->host_initiated) { |
1580 | /* | |
1581 | * detection of vcpu initialization -- need to sync | |
1582 | * with other vCPUs. This particularly helps to keep | |
1583 | * kvm_clock stable after CPU hotplug | |
1584 | */ | |
1585 | synchronizing = true; | |
1586 | } else { | |
1587 | u64 tsc_exp = kvm->arch.last_tsc_write + | |
1588 | nsec_to_cycles(vcpu, elapsed); | |
1589 | u64 tsc_hz = vcpu->arch.virtual_tsc_khz * 1000LL; | |
1590 | /* | |
1591 | * Special case: TSC write with a small delta (1 second) | |
1592 | * of virtual cycle time against real time is | |
1593 | * interpreted as an attempt to synchronize the CPU. | |
1594 | */ | |
1595 | synchronizing = data < tsc_exp + tsc_hz && | |
1596 | data + tsc_hz > tsc_exp; | |
1597 | } | |
c5e8ec8e | 1598 | } |
f38e098f ZA |
1599 | |
1600 | /* | |
5d3cb0f6 ZA |
1601 | * For a reliable TSC, we can match TSC offsets, and for an unstable |
1602 | * TSC, we add elapsed time in this computation. We could let the | |
1603 | * compensation code attempt to catch up if we fall behind, but | |
1604 | * it's better to try to match offsets from the beginning. | |
1605 | */ | |
c5e8ec8e | 1606 | if (synchronizing && |
5d3cb0f6 | 1607 | vcpu->arch.virtual_tsc_khz == kvm->arch.last_tsc_khz) { |
b0c39dc6 | 1608 | if (!kvm_check_tsc_unstable()) { |
e26101b1 | 1609 | offset = kvm->arch.cur_tsc_offset; |
f38e098f ZA |
1610 | pr_debug("kvm: matched tsc offset for %llu\n", data); |
1611 | } else { | |
857e4099 | 1612 | u64 delta = nsec_to_cycles(vcpu, elapsed); |
5d3cb0f6 | 1613 | data += delta; |
07c1419a | 1614 | offset = kvm_compute_tsc_offset(vcpu, data); |
759379dd | 1615 | pr_debug("kvm: adjusted tsc offset by %llu\n", delta); |
f38e098f | 1616 | } |
b48aa97e | 1617 | matched = true; |
0d3da0d2 | 1618 | already_matched = (vcpu->arch.this_tsc_generation == kvm->arch.cur_tsc_generation); |
e26101b1 ZA |
1619 | } else { |
1620 | /* | |
1621 | * We split periods of matched TSC writes into generations. | |
1622 | * For each generation, we track the original measured | |
1623 | * nanosecond time, offset, and write, so if TSCs are in | |
1624 | * sync, we can match exact offset, and if not, we can match | |
4a969980 | 1625 | * exact software computation in compute_guest_tsc() |
e26101b1 ZA |
1626 | * |
1627 | * These values are tracked in kvm->arch.cur_xxx variables. | |
1628 | */ | |
1629 | kvm->arch.cur_tsc_generation++; | |
1630 | kvm->arch.cur_tsc_nsec = ns; | |
1631 | kvm->arch.cur_tsc_write = data; | |
1632 | kvm->arch.cur_tsc_offset = offset; | |
b48aa97e | 1633 | matched = false; |
0d3da0d2 | 1634 | pr_debug("kvm: new tsc generation %llu, clock %llu\n", |
e26101b1 | 1635 | kvm->arch.cur_tsc_generation, data); |
f38e098f | 1636 | } |
e26101b1 ZA |
1637 | |
1638 | /* | |
1639 | * We also track th most recent recorded KHZ, write and time to | |
1640 | * allow the matching interval to be extended at each write. | |
1641 | */ | |
f38e098f ZA |
1642 | kvm->arch.last_tsc_nsec = ns; |
1643 | kvm->arch.last_tsc_write = data; | |
5d3cb0f6 | 1644 | kvm->arch.last_tsc_khz = vcpu->arch.virtual_tsc_khz; |
99e3e30a | 1645 | |
b183aa58 | 1646 | vcpu->arch.last_guest_tsc = data; |
e26101b1 ZA |
1647 | |
1648 | /* Keep track of which generation this VCPU has synchronized to */ | |
1649 | vcpu->arch.this_tsc_generation = kvm->arch.cur_tsc_generation; | |
1650 | vcpu->arch.this_tsc_nsec = kvm->arch.cur_tsc_nsec; | |
1651 | vcpu->arch.this_tsc_write = kvm->arch.cur_tsc_write; | |
1652 | ||
d6321d49 | 1653 | if (!msr->host_initiated && guest_cpuid_has(vcpu, X86_FEATURE_TSC_ADJUST)) |
ba904635 | 1654 | update_ia32_tsc_adjust_msr(vcpu, offset); |
d6321d49 | 1655 | |
a545ab6a | 1656 | kvm_vcpu_write_tsc_offset(vcpu, offset); |
e26101b1 | 1657 | raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags); |
b48aa97e MT |
1658 | |
1659 | spin_lock(&kvm->arch.pvclock_gtod_sync_lock); | |
0d3da0d2 | 1660 | if (!matched) { |
b48aa97e | 1661 | kvm->arch.nr_vcpus_matched_tsc = 0; |
0d3da0d2 TG |
1662 | } else if (!already_matched) { |
1663 | kvm->arch.nr_vcpus_matched_tsc++; | |
1664 | } | |
b48aa97e MT |
1665 | |
1666 | kvm_track_tsc_matching(vcpu); | |
1667 | spin_unlock(&kvm->arch.pvclock_gtod_sync_lock); | |
99e3e30a | 1668 | } |
e26101b1 | 1669 | |
99e3e30a ZA |
1670 | EXPORT_SYMBOL_GPL(kvm_write_tsc); |
1671 | ||
58ea6767 HZ |
1672 | static inline void adjust_tsc_offset_guest(struct kvm_vcpu *vcpu, |
1673 | s64 adjustment) | |
1674 | { | |
ea26e4ec | 1675 | kvm_vcpu_write_tsc_offset(vcpu, vcpu->arch.tsc_offset + adjustment); |
58ea6767 HZ |
1676 | } |
1677 | ||
1678 | static inline void adjust_tsc_offset_host(struct kvm_vcpu *vcpu, s64 adjustment) | |
1679 | { | |
1680 | if (vcpu->arch.tsc_scaling_ratio != kvm_default_tsc_scaling_ratio) | |
1681 | WARN_ON(adjustment < 0); | |
1682 | adjustment = kvm_scale_tsc(vcpu, (u64) adjustment); | |
ea26e4ec | 1683 | adjust_tsc_offset_guest(vcpu, adjustment); |
58ea6767 HZ |
1684 | } |
1685 | ||
d828199e MT |
1686 | #ifdef CONFIG_X86_64 |
1687 | ||
a5a1d1c2 | 1688 | static u64 read_tsc(void) |
d828199e | 1689 | { |
a5a1d1c2 | 1690 | u64 ret = (u64)rdtsc_ordered(); |
03b9730b | 1691 | u64 last = pvclock_gtod_data.clock.cycle_last; |
d828199e MT |
1692 | |
1693 | if (likely(ret >= last)) | |
1694 | return ret; | |
1695 | ||
1696 | /* | |
1697 | * GCC likes to generate cmov here, but this branch is extremely | |
6a6256f9 | 1698 | * predictable (it's just a function of time and the likely is |
d828199e MT |
1699 | * very likely) and there's a data dependence, so force GCC |
1700 | * to generate a branch instead. I don't barrier() because | |
1701 | * we don't actually need a barrier, and if this function | |
1702 | * ever gets inlined it will generate worse code. | |
1703 | */ | |
1704 | asm volatile (""); | |
1705 | return last; | |
1706 | } | |
1707 | ||
b0c39dc6 | 1708 | static inline u64 vgettsc(u64 *tsc_timestamp, int *mode) |
d828199e MT |
1709 | { |
1710 | long v; | |
1711 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
b0c39dc6 VK |
1712 | u64 tsc_pg_val; |
1713 | ||
1714 | switch (gtod->clock.vclock_mode) { | |
1715 | case VCLOCK_HVCLOCK: | |
1716 | tsc_pg_val = hv_read_tsc_page_tsc(hv_get_tsc_page(), | |
1717 | tsc_timestamp); | |
1718 | if (tsc_pg_val != U64_MAX) { | |
1719 | /* TSC page valid */ | |
1720 | *mode = VCLOCK_HVCLOCK; | |
1721 | v = (tsc_pg_val - gtod->clock.cycle_last) & | |
1722 | gtod->clock.mask; | |
1723 | } else { | |
1724 | /* TSC page invalid */ | |
1725 | *mode = VCLOCK_NONE; | |
1726 | } | |
1727 | break; | |
1728 | case VCLOCK_TSC: | |
1729 | *mode = VCLOCK_TSC; | |
1730 | *tsc_timestamp = read_tsc(); | |
1731 | v = (*tsc_timestamp - gtod->clock.cycle_last) & | |
1732 | gtod->clock.mask; | |
1733 | break; | |
1734 | default: | |
1735 | *mode = VCLOCK_NONE; | |
1736 | } | |
d828199e | 1737 | |
b0c39dc6 VK |
1738 | if (*mode == VCLOCK_NONE) |
1739 | *tsc_timestamp = v = 0; | |
d828199e | 1740 | |
d828199e MT |
1741 | return v * gtod->clock.mult; |
1742 | } | |
1743 | ||
b0c39dc6 | 1744 | static int do_monotonic_boot(s64 *t, u64 *tsc_timestamp) |
d828199e | 1745 | { |
cbcf2dd3 | 1746 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; |
d828199e | 1747 | unsigned long seq; |
d828199e | 1748 | int mode; |
cbcf2dd3 | 1749 | u64 ns; |
d828199e | 1750 | |
d828199e MT |
1751 | do { |
1752 | seq = read_seqcount_begin(>od->seq); | |
cbcf2dd3 | 1753 | ns = gtod->nsec_base; |
b0c39dc6 | 1754 | ns += vgettsc(tsc_timestamp, &mode); |
d828199e | 1755 | ns >>= gtod->clock.shift; |
cbcf2dd3 | 1756 | ns += gtod->boot_ns; |
d828199e | 1757 | } while (unlikely(read_seqcount_retry(>od->seq, seq))); |
cbcf2dd3 | 1758 | *t = ns; |
d828199e MT |
1759 | |
1760 | return mode; | |
1761 | } | |
1762 | ||
b0c39dc6 | 1763 | static int do_realtime(struct timespec *ts, u64 *tsc_timestamp) |
55dd00a7 MT |
1764 | { |
1765 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
1766 | unsigned long seq; | |
1767 | int mode; | |
1768 | u64 ns; | |
1769 | ||
1770 | do { | |
1771 | seq = read_seqcount_begin(>od->seq); | |
55dd00a7 MT |
1772 | ts->tv_sec = gtod->wall_time_sec; |
1773 | ns = gtod->nsec_base; | |
b0c39dc6 | 1774 | ns += vgettsc(tsc_timestamp, &mode); |
55dd00a7 MT |
1775 | ns >>= gtod->clock.shift; |
1776 | } while (unlikely(read_seqcount_retry(>od->seq, seq))); | |
1777 | ||
1778 | ts->tv_sec += __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns); | |
1779 | ts->tv_nsec = ns; | |
1780 | ||
1781 | return mode; | |
1782 | } | |
1783 | ||
b0c39dc6 VK |
1784 | /* returns true if host is using TSC based clocksource */ |
1785 | static bool kvm_get_time_and_clockread(s64 *kernel_ns, u64 *tsc_timestamp) | |
d828199e | 1786 | { |
d828199e | 1787 | /* checked again under seqlock below */ |
b0c39dc6 | 1788 | if (!gtod_is_based_on_tsc(pvclock_gtod_data.clock.vclock_mode)) |
d828199e MT |
1789 | return false; |
1790 | ||
b0c39dc6 VK |
1791 | return gtod_is_based_on_tsc(do_monotonic_boot(kernel_ns, |
1792 | tsc_timestamp)); | |
d828199e | 1793 | } |
55dd00a7 | 1794 | |
b0c39dc6 | 1795 | /* returns true if host is using TSC based clocksource */ |
55dd00a7 | 1796 | static bool kvm_get_walltime_and_clockread(struct timespec *ts, |
b0c39dc6 | 1797 | u64 *tsc_timestamp) |
55dd00a7 MT |
1798 | { |
1799 | /* checked again under seqlock below */ | |
b0c39dc6 | 1800 | if (!gtod_is_based_on_tsc(pvclock_gtod_data.clock.vclock_mode)) |
55dd00a7 MT |
1801 | return false; |
1802 | ||
b0c39dc6 | 1803 | return gtod_is_based_on_tsc(do_realtime(ts, tsc_timestamp)); |
55dd00a7 | 1804 | } |
d828199e MT |
1805 | #endif |
1806 | ||
1807 | /* | |
1808 | * | |
b48aa97e MT |
1809 | * Assuming a stable TSC across physical CPUS, and a stable TSC |
1810 | * across virtual CPUs, the following condition is possible. | |
1811 | * Each numbered line represents an event visible to both | |
d828199e MT |
1812 | * CPUs at the next numbered event. |
1813 | * | |
1814 | * "timespecX" represents host monotonic time. "tscX" represents | |
1815 | * RDTSC value. | |
1816 | * | |
1817 | * VCPU0 on CPU0 | VCPU1 on CPU1 | |
1818 | * | |
1819 | * 1. read timespec0,tsc0 | |
1820 | * 2. | timespec1 = timespec0 + N | |
1821 | * | tsc1 = tsc0 + M | |
1822 | * 3. transition to guest | transition to guest | |
1823 | * 4. ret0 = timespec0 + (rdtsc - tsc0) | | |
1824 | * 5. | ret1 = timespec1 + (rdtsc - tsc1) | |
1825 | * | ret1 = timespec0 + N + (rdtsc - (tsc0 + M)) | |
1826 | * | |
1827 | * Since ret0 update is visible to VCPU1 at time 5, to obey monotonicity: | |
1828 | * | |
1829 | * - ret0 < ret1 | |
1830 | * - timespec0 + (rdtsc - tsc0) < timespec0 + N + (rdtsc - (tsc0 + M)) | |
1831 | * ... | |
1832 | * - 0 < N - M => M < N | |
1833 | * | |
1834 | * That is, when timespec0 != timespec1, M < N. Unfortunately that is not | |
1835 | * always the case (the difference between two distinct xtime instances | |
1836 | * might be smaller then the difference between corresponding TSC reads, | |
1837 | * when updating guest vcpus pvclock areas). | |
1838 | * | |
1839 | * To avoid that problem, do not allow visibility of distinct | |
1840 | * system_timestamp/tsc_timestamp values simultaneously: use a master | |
1841 | * copy of host monotonic time values. Update that master copy | |
1842 | * in lockstep. | |
1843 | * | |
b48aa97e | 1844 | * Rely on synchronization of host TSCs and guest TSCs for monotonicity. |
d828199e MT |
1845 | * |
1846 | */ | |
1847 | ||
1848 | static void pvclock_update_vm_gtod_copy(struct kvm *kvm) | |
1849 | { | |
1850 | #ifdef CONFIG_X86_64 | |
1851 | struct kvm_arch *ka = &kvm->arch; | |
1852 | int vclock_mode; | |
b48aa97e MT |
1853 | bool host_tsc_clocksource, vcpus_matched; |
1854 | ||
1855 | vcpus_matched = (ka->nr_vcpus_matched_tsc + 1 == | |
1856 | atomic_read(&kvm->online_vcpus)); | |
d828199e MT |
1857 | |
1858 | /* | |
1859 | * If the host uses TSC clock, then passthrough TSC as stable | |
1860 | * to the guest. | |
1861 | */ | |
b48aa97e | 1862 | host_tsc_clocksource = kvm_get_time_and_clockread( |
d828199e MT |
1863 | &ka->master_kernel_ns, |
1864 | &ka->master_cycle_now); | |
1865 | ||
16a96021 | 1866 | ka->use_master_clock = host_tsc_clocksource && vcpus_matched |
a826faf1 | 1867 | && !ka->backwards_tsc_observed |
54750f2c | 1868 | && !ka->boot_vcpu_runs_old_kvmclock; |
b48aa97e | 1869 | |
d828199e MT |
1870 | if (ka->use_master_clock) |
1871 | atomic_set(&kvm_guest_has_master_clock, 1); | |
1872 | ||
1873 | vclock_mode = pvclock_gtod_data.clock.vclock_mode; | |
b48aa97e MT |
1874 | trace_kvm_update_master_clock(ka->use_master_clock, vclock_mode, |
1875 | vcpus_matched); | |
d828199e MT |
1876 | #endif |
1877 | } | |
1878 | ||
2860c4b1 PB |
1879 | void kvm_make_mclock_inprogress_request(struct kvm *kvm) |
1880 | { | |
1881 | kvm_make_all_cpus_request(kvm, KVM_REQ_MCLOCK_INPROGRESS); | |
1882 | } | |
1883 | ||
2e762ff7 MT |
1884 | static void kvm_gen_update_masterclock(struct kvm *kvm) |
1885 | { | |
1886 | #ifdef CONFIG_X86_64 | |
1887 | int i; | |
1888 | struct kvm_vcpu *vcpu; | |
1889 | struct kvm_arch *ka = &kvm->arch; | |
1890 | ||
1891 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
1892 | kvm_make_mclock_inprogress_request(kvm); | |
1893 | /* no guest entries from this point */ | |
1894 | pvclock_update_vm_gtod_copy(kvm); | |
1895 | ||
1896 | kvm_for_each_vcpu(i, vcpu, kvm) | |
105b21bb | 1897 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
2e762ff7 MT |
1898 | |
1899 | /* guest entries allowed */ | |
1900 | kvm_for_each_vcpu(i, vcpu, kvm) | |
72875d8a | 1901 | kvm_clear_request(KVM_REQ_MCLOCK_INPROGRESS, vcpu); |
2e762ff7 MT |
1902 | |
1903 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
1904 | #endif | |
1905 | } | |
1906 | ||
e891a32e | 1907 | u64 get_kvmclock_ns(struct kvm *kvm) |
108b249c | 1908 | { |
108b249c | 1909 | struct kvm_arch *ka = &kvm->arch; |
8b953440 | 1910 | struct pvclock_vcpu_time_info hv_clock; |
e2c2206a | 1911 | u64 ret; |
108b249c | 1912 | |
8b953440 PB |
1913 | spin_lock(&ka->pvclock_gtod_sync_lock); |
1914 | if (!ka->use_master_clock) { | |
1915 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
1916 | return ktime_get_boot_ns() + ka->kvmclock_offset; | |
108b249c PB |
1917 | } |
1918 | ||
8b953440 PB |
1919 | hv_clock.tsc_timestamp = ka->master_cycle_now; |
1920 | hv_clock.system_time = ka->master_kernel_ns + ka->kvmclock_offset; | |
1921 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
1922 | ||
e2c2206a WL |
1923 | /* both __this_cpu_read() and rdtsc() should be on the same cpu */ |
1924 | get_cpu(); | |
1925 | ||
e70b57a6 WL |
1926 | if (__this_cpu_read(cpu_tsc_khz)) { |
1927 | kvm_get_time_scale(NSEC_PER_SEC, __this_cpu_read(cpu_tsc_khz) * 1000LL, | |
1928 | &hv_clock.tsc_shift, | |
1929 | &hv_clock.tsc_to_system_mul); | |
1930 | ret = __pvclock_read_cycles(&hv_clock, rdtsc()); | |
1931 | } else | |
1932 | ret = ktime_get_boot_ns() + ka->kvmclock_offset; | |
e2c2206a WL |
1933 | |
1934 | put_cpu(); | |
1935 | ||
1936 | return ret; | |
108b249c PB |
1937 | } |
1938 | ||
0d6dd2ff PB |
1939 | static void kvm_setup_pvclock_page(struct kvm_vcpu *v) |
1940 | { | |
1941 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
1942 | struct pvclock_vcpu_time_info guest_hv_clock; | |
1943 | ||
4e335d9e | 1944 | if (unlikely(kvm_read_guest_cached(v->kvm, &vcpu->pv_time, |
0d6dd2ff PB |
1945 | &guest_hv_clock, sizeof(guest_hv_clock)))) |
1946 | return; | |
1947 | ||
1948 | /* This VCPU is paused, but it's legal for a guest to read another | |
1949 | * VCPU's kvmclock, so we really have to follow the specification where | |
1950 | * it says that version is odd if data is being modified, and even after | |
1951 | * it is consistent. | |
1952 | * | |
1953 | * Version field updates must be kept separate. This is because | |
1954 | * kvm_write_guest_cached might use a "rep movs" instruction, and | |
1955 | * writes within a string instruction are weakly ordered. So there | |
1956 | * are three writes overall. | |
1957 | * | |
1958 | * As a small optimization, only write the version field in the first | |
1959 | * and third write. The vcpu->pv_time cache is still valid, because the | |
1960 | * version field is the first in the struct. | |
1961 | */ | |
1962 | BUILD_BUG_ON(offsetof(struct pvclock_vcpu_time_info, version) != 0); | |
1963 | ||
51c4b8bb LA |
1964 | if (guest_hv_clock.version & 1) |
1965 | ++guest_hv_clock.version; /* first time write, random junk */ | |
1966 | ||
0d6dd2ff | 1967 | vcpu->hv_clock.version = guest_hv_clock.version + 1; |
4e335d9e PB |
1968 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
1969 | &vcpu->hv_clock, | |
1970 | sizeof(vcpu->hv_clock.version)); | |
0d6dd2ff PB |
1971 | |
1972 | smp_wmb(); | |
1973 | ||
1974 | /* retain PVCLOCK_GUEST_STOPPED if set in guest copy */ | |
1975 | vcpu->hv_clock.flags |= (guest_hv_clock.flags & PVCLOCK_GUEST_STOPPED); | |
1976 | ||
1977 | if (vcpu->pvclock_set_guest_stopped_request) { | |
1978 | vcpu->hv_clock.flags |= PVCLOCK_GUEST_STOPPED; | |
1979 | vcpu->pvclock_set_guest_stopped_request = false; | |
1980 | } | |
1981 | ||
1982 | trace_kvm_pvclock_update(v->vcpu_id, &vcpu->hv_clock); | |
1983 | ||
4e335d9e PB |
1984 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
1985 | &vcpu->hv_clock, | |
1986 | sizeof(vcpu->hv_clock)); | |
0d6dd2ff PB |
1987 | |
1988 | smp_wmb(); | |
1989 | ||
1990 | vcpu->hv_clock.version++; | |
4e335d9e PB |
1991 | kvm_write_guest_cached(v->kvm, &vcpu->pv_time, |
1992 | &vcpu->hv_clock, | |
1993 | sizeof(vcpu->hv_clock.version)); | |
0d6dd2ff PB |
1994 | } |
1995 | ||
34c238a1 | 1996 | static int kvm_guest_time_update(struct kvm_vcpu *v) |
18068523 | 1997 | { |
78db6a50 | 1998 | unsigned long flags, tgt_tsc_khz; |
18068523 | 1999 | struct kvm_vcpu_arch *vcpu = &v->arch; |
d828199e | 2000 | struct kvm_arch *ka = &v->kvm->arch; |
f25e656d | 2001 | s64 kernel_ns; |
d828199e | 2002 | u64 tsc_timestamp, host_tsc; |
51d59c6b | 2003 | u8 pvclock_flags; |
d828199e MT |
2004 | bool use_master_clock; |
2005 | ||
2006 | kernel_ns = 0; | |
2007 | host_tsc = 0; | |
18068523 | 2008 | |
d828199e MT |
2009 | /* |
2010 | * If the host uses TSC clock, then passthrough TSC as stable | |
2011 | * to the guest. | |
2012 | */ | |
2013 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
2014 | use_master_clock = ka->use_master_clock; | |
2015 | if (use_master_clock) { | |
2016 | host_tsc = ka->master_cycle_now; | |
2017 | kernel_ns = ka->master_kernel_ns; | |
2018 | } | |
2019 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
c09664bb MT |
2020 | |
2021 | /* Keep irq disabled to prevent changes to the clock */ | |
2022 | local_irq_save(flags); | |
78db6a50 PB |
2023 | tgt_tsc_khz = __this_cpu_read(cpu_tsc_khz); |
2024 | if (unlikely(tgt_tsc_khz == 0)) { | |
c09664bb MT |
2025 | local_irq_restore(flags); |
2026 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); | |
2027 | return 1; | |
2028 | } | |
d828199e | 2029 | if (!use_master_clock) { |
4ea1636b | 2030 | host_tsc = rdtsc(); |
108b249c | 2031 | kernel_ns = ktime_get_boot_ns(); |
d828199e MT |
2032 | } |
2033 | ||
4ba76538 | 2034 | tsc_timestamp = kvm_read_l1_tsc(v, host_tsc); |
d828199e | 2035 | |
c285545f ZA |
2036 | /* |
2037 | * We may have to catch up the TSC to match elapsed wall clock | |
2038 | * time for two reasons, even if kvmclock is used. | |
2039 | * 1) CPU could have been running below the maximum TSC rate | |
2040 | * 2) Broken TSC compensation resets the base at each VCPU | |
2041 | * entry to avoid unknown leaps of TSC even when running | |
2042 | * again on the same CPU. This may cause apparent elapsed | |
2043 | * time to disappear, and the guest to stand still or run | |
2044 | * very slowly. | |
2045 | */ | |
2046 | if (vcpu->tsc_catchup) { | |
2047 | u64 tsc = compute_guest_tsc(v, kernel_ns); | |
2048 | if (tsc > tsc_timestamp) { | |
f1e2b260 | 2049 | adjust_tsc_offset_guest(v, tsc - tsc_timestamp); |
c285545f ZA |
2050 | tsc_timestamp = tsc; |
2051 | } | |
50d0a0f9 GH |
2052 | } |
2053 | ||
18068523 GOC |
2054 | local_irq_restore(flags); |
2055 | ||
0d6dd2ff | 2056 | /* With all the info we got, fill in the values */ |
18068523 | 2057 | |
78db6a50 PB |
2058 | if (kvm_has_tsc_control) |
2059 | tgt_tsc_khz = kvm_scale_tsc(v, tgt_tsc_khz); | |
2060 | ||
2061 | if (unlikely(vcpu->hw_tsc_khz != tgt_tsc_khz)) { | |
3ae13faa | 2062 | kvm_get_time_scale(NSEC_PER_SEC, tgt_tsc_khz * 1000LL, |
5f4e3f88 ZA |
2063 | &vcpu->hv_clock.tsc_shift, |
2064 | &vcpu->hv_clock.tsc_to_system_mul); | |
78db6a50 | 2065 | vcpu->hw_tsc_khz = tgt_tsc_khz; |
8cfdc000 ZA |
2066 | } |
2067 | ||
1d5f066e | 2068 | vcpu->hv_clock.tsc_timestamp = tsc_timestamp; |
759379dd | 2069 | vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset; |
28e4639a | 2070 | vcpu->last_guest_tsc = tsc_timestamp; |
51d59c6b | 2071 | |
d828199e | 2072 | /* If the host uses TSC clocksource, then it is stable */ |
0d6dd2ff | 2073 | pvclock_flags = 0; |
d828199e MT |
2074 | if (use_master_clock) |
2075 | pvclock_flags |= PVCLOCK_TSC_STABLE_BIT; | |
2076 | ||
78c0337a MT |
2077 | vcpu->hv_clock.flags = pvclock_flags; |
2078 | ||
095cf55d PB |
2079 | if (vcpu->pv_time_enabled) |
2080 | kvm_setup_pvclock_page(v); | |
2081 | if (v == kvm_get_vcpu(v->kvm, 0)) | |
2082 | kvm_hv_setup_tsc_page(v->kvm, &vcpu->hv_clock); | |
8cfdc000 | 2083 | return 0; |
c8076604 GH |
2084 | } |
2085 | ||
0061d53d MT |
2086 | /* |
2087 | * kvmclock updates which are isolated to a given vcpu, such as | |
2088 | * vcpu->cpu migration, should not allow system_timestamp from | |
2089 | * the rest of the vcpus to remain static. Otherwise ntp frequency | |
2090 | * correction applies to one vcpu's system_timestamp but not | |
2091 | * the others. | |
2092 | * | |
2093 | * So in those cases, request a kvmclock update for all vcpus. | |
7e44e449 AJ |
2094 | * We need to rate-limit these requests though, as they can |
2095 | * considerably slow guests that have a large number of vcpus. | |
2096 | * The time for a remote vcpu to update its kvmclock is bound | |
2097 | * by the delay we use to rate-limit the updates. | |
0061d53d MT |
2098 | */ |
2099 | ||
7e44e449 AJ |
2100 | #define KVMCLOCK_UPDATE_DELAY msecs_to_jiffies(100) |
2101 | ||
2102 | static void kvmclock_update_fn(struct work_struct *work) | |
0061d53d MT |
2103 | { |
2104 | int i; | |
7e44e449 AJ |
2105 | struct delayed_work *dwork = to_delayed_work(work); |
2106 | struct kvm_arch *ka = container_of(dwork, struct kvm_arch, | |
2107 | kvmclock_update_work); | |
2108 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
0061d53d MT |
2109 | struct kvm_vcpu *vcpu; |
2110 | ||
2111 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
105b21bb | 2112 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0061d53d MT |
2113 | kvm_vcpu_kick(vcpu); |
2114 | } | |
2115 | } | |
2116 | ||
7e44e449 AJ |
2117 | static void kvm_gen_kvmclock_update(struct kvm_vcpu *v) |
2118 | { | |
2119 | struct kvm *kvm = v->kvm; | |
2120 | ||
105b21bb | 2121 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); |
7e44e449 AJ |
2122 | schedule_delayed_work(&kvm->arch.kvmclock_update_work, |
2123 | KVMCLOCK_UPDATE_DELAY); | |
2124 | } | |
2125 | ||
332967a3 AJ |
2126 | #define KVMCLOCK_SYNC_PERIOD (300 * HZ) |
2127 | ||
2128 | static void kvmclock_sync_fn(struct work_struct *work) | |
2129 | { | |
2130 | struct delayed_work *dwork = to_delayed_work(work); | |
2131 | struct kvm_arch *ka = container_of(dwork, struct kvm_arch, | |
2132 | kvmclock_sync_work); | |
2133 | struct kvm *kvm = container_of(ka, struct kvm, arch); | |
2134 | ||
630994b3 MT |
2135 | if (!kvmclock_periodic_sync) |
2136 | return; | |
2137 | ||
332967a3 AJ |
2138 | schedule_delayed_work(&kvm->arch.kvmclock_update_work, 0); |
2139 | schedule_delayed_work(&kvm->arch.kvmclock_sync_work, | |
2140 | KVMCLOCK_SYNC_PERIOD); | |
2141 | } | |
2142 | ||
9ffd986c | 2143 | static int set_msr_mce(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
15c4a640 | 2144 | { |
890ca9ae HY |
2145 | u64 mcg_cap = vcpu->arch.mcg_cap; |
2146 | unsigned bank_num = mcg_cap & 0xff; | |
9ffd986c WL |
2147 | u32 msr = msr_info->index; |
2148 | u64 data = msr_info->data; | |
890ca9ae | 2149 | |
15c4a640 | 2150 | switch (msr) { |
15c4a640 | 2151 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 2152 | vcpu->arch.mcg_status = data; |
15c4a640 | 2153 | break; |
c7ac679c | 2154 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
2155 | if (!(mcg_cap & MCG_CTL_P)) |
2156 | return 1; | |
2157 | if (data != 0 && data != ~(u64)0) | |
2158 | return -1; | |
2159 | vcpu->arch.mcg_ctl = data; | |
2160 | break; | |
2161 | default: | |
2162 | if (msr >= MSR_IA32_MC0_CTL && | |
81760dcc | 2163 | msr < MSR_IA32_MCx_CTL(bank_num)) { |
890ca9ae | 2164 | u32 offset = msr - MSR_IA32_MC0_CTL; |
114be429 AP |
2165 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
2166 | * some Linux kernels though clear bit 10 in bank 4 to | |
2167 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore | |
2168 | * this to avoid an uncatched #GP in the guest | |
2169 | */ | |
890ca9ae | 2170 | if ((offset & 0x3) == 0 && |
114be429 | 2171 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
890ca9ae | 2172 | return -1; |
9ffd986c WL |
2173 | if (!msr_info->host_initiated && |
2174 | (offset & 0x3) == 1 && data != 0) | |
2175 | return -1; | |
890ca9ae HY |
2176 | vcpu->arch.mce_banks[offset] = data; |
2177 | break; | |
2178 | } | |
2179 | return 1; | |
2180 | } | |
2181 | return 0; | |
2182 | } | |
2183 | ||
ffde22ac ES |
2184 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
2185 | { | |
2186 | struct kvm *kvm = vcpu->kvm; | |
2187 | int lm = is_long_mode(vcpu); | |
2188 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
2189 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
2190 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
2191 | : kvm->arch.xen_hvm_config.blob_size_32; | |
2192 | u32 page_num = data & ~PAGE_MASK; | |
2193 | u64 page_addr = data & PAGE_MASK; | |
2194 | u8 *page; | |
2195 | int r; | |
2196 | ||
2197 | r = -E2BIG; | |
2198 | if (page_num >= blob_size) | |
2199 | goto out; | |
2200 | r = -ENOMEM; | |
ff5c2c03 SL |
2201 | page = memdup_user(blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE); |
2202 | if (IS_ERR(page)) { | |
2203 | r = PTR_ERR(page); | |
ffde22ac | 2204 | goto out; |
ff5c2c03 | 2205 | } |
54bf36aa | 2206 | if (kvm_vcpu_write_guest(vcpu, page_addr, page, PAGE_SIZE)) |
ffde22ac ES |
2207 | goto out_free; |
2208 | r = 0; | |
2209 | out_free: | |
2210 | kfree(page); | |
2211 | out: | |
2212 | return r; | |
2213 | } | |
2214 | ||
344d9588 GN |
2215 | static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data) |
2216 | { | |
2217 | gpa_t gpa = data & ~0x3f; | |
2218 | ||
52a5c155 WL |
2219 | /* Bits 3:5 are reserved, Should be zero */ |
2220 | if (data & 0x38) | |
344d9588 GN |
2221 | return 1; |
2222 | ||
2223 | vcpu->arch.apf.msr_val = data; | |
2224 | ||
2225 | if (!(data & KVM_ASYNC_PF_ENABLED)) { | |
2226 | kvm_clear_async_pf_completion_queue(vcpu); | |
2227 | kvm_async_pf_hash_reset(vcpu); | |
2228 | return 0; | |
2229 | } | |
2230 | ||
4e335d9e | 2231 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.apf.data, gpa, |
8f964525 | 2232 | sizeof(u32))) |
344d9588 GN |
2233 | return 1; |
2234 | ||
6adba527 | 2235 | vcpu->arch.apf.send_user_only = !(data & KVM_ASYNC_PF_SEND_ALWAYS); |
52a5c155 | 2236 | vcpu->arch.apf.delivery_as_pf_vmexit = data & KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT; |
344d9588 GN |
2237 | kvm_async_pf_wakeup_all(vcpu); |
2238 | return 0; | |
2239 | } | |
2240 | ||
12f9a48f GC |
2241 | static void kvmclock_reset(struct kvm_vcpu *vcpu) |
2242 | { | |
0b79459b | 2243 | vcpu->arch.pv_time_enabled = false; |
12f9a48f GC |
2244 | } |
2245 | ||
f38a7b75 WL |
2246 | static void kvm_vcpu_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa) |
2247 | { | |
2248 | ++vcpu->stat.tlb_flush; | |
2249 | kvm_x86_ops->tlb_flush(vcpu, invalidate_gpa); | |
2250 | } | |
2251 | ||
c9aaa895 GC |
2252 | static void record_steal_time(struct kvm_vcpu *vcpu) |
2253 | { | |
2254 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
2255 | return; | |
2256 | ||
4e335d9e | 2257 | if (unlikely(kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
c9aaa895 GC |
2258 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)))) |
2259 | return; | |
2260 | ||
f38a7b75 WL |
2261 | /* |
2262 | * Doing a TLB flush here, on the guest's behalf, can avoid | |
2263 | * expensive IPIs. | |
2264 | */ | |
2265 | if (xchg(&vcpu->arch.st.steal.preempted, 0) & KVM_VCPU_FLUSH_TLB) | |
2266 | kvm_vcpu_flush_tlb(vcpu, false); | |
0b9f6c46 | 2267 | |
35f3fae1 WL |
2268 | if (vcpu->arch.st.steal.version & 1) |
2269 | vcpu->arch.st.steal.version += 1; /* first time write, random junk */ | |
2270 | ||
2271 | vcpu->arch.st.steal.version += 1; | |
2272 | ||
4e335d9e | 2273 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
35f3fae1 WL |
2274 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); |
2275 | ||
2276 | smp_wmb(); | |
2277 | ||
c54cdf14 LC |
2278 | vcpu->arch.st.steal.steal += current->sched_info.run_delay - |
2279 | vcpu->arch.st.last_steal; | |
2280 | vcpu->arch.st.last_steal = current->sched_info.run_delay; | |
35f3fae1 | 2281 | |
4e335d9e | 2282 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
35f3fae1 WL |
2283 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); |
2284 | ||
2285 | smp_wmb(); | |
2286 | ||
2287 | vcpu->arch.st.steal.version += 1; | |
c9aaa895 | 2288 | |
4e335d9e | 2289 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, |
c9aaa895 GC |
2290 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); |
2291 | } | |
2292 | ||
8fe8ab46 | 2293 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
15c4a640 | 2294 | { |
5753785f | 2295 | bool pr = false; |
8fe8ab46 WA |
2296 | u32 msr = msr_info->index; |
2297 | u64 data = msr_info->data; | |
5753785f | 2298 | |
15c4a640 | 2299 | switch (msr) { |
2e32b719 | 2300 | case MSR_AMD64_NB_CFG: |
2e32b719 BP |
2301 | case MSR_IA32_UCODE_WRITE: |
2302 | case MSR_VM_HSAVE_PA: | |
2303 | case MSR_AMD64_PATCH_LOADER: | |
2304 | case MSR_AMD64_BU_CFG2: | |
405a353a | 2305 | case MSR_AMD64_DC_CFG: |
2e32b719 BP |
2306 | break; |
2307 | ||
518e7b94 WL |
2308 | case MSR_IA32_UCODE_REV: |
2309 | if (msr_info->host_initiated) | |
2310 | vcpu->arch.microcode_version = data; | |
2311 | break; | |
15c4a640 | 2312 | case MSR_EFER: |
b69e8cae | 2313 | return set_efer(vcpu, data); |
8f1589d9 AP |
2314 | case MSR_K7_HWCR: |
2315 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
82494028 | 2316 | data &= ~(u64)0x100; /* ignore ignne emulation enable */ |
a223c313 | 2317 | data &= ~(u64)0x8; /* ignore TLB cache disable */ |
22d48b2d | 2318 | data &= ~(u64)0x40000; /* ignore Mc status write enable */ |
8f1589d9 | 2319 | if (data != 0) { |
a737f256 CD |
2320 | vcpu_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", |
2321 | data); | |
8f1589d9 AP |
2322 | return 1; |
2323 | } | |
15c4a640 | 2324 | break; |
f7c6d140 AP |
2325 | case MSR_FAM10H_MMIO_CONF_BASE: |
2326 | if (data != 0) { | |
a737f256 CD |
2327 | vcpu_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " |
2328 | "0x%llx\n", data); | |
f7c6d140 AP |
2329 | return 1; |
2330 | } | |
15c4a640 | 2331 | break; |
b5e2fec0 AG |
2332 | case MSR_IA32_DEBUGCTLMSR: |
2333 | if (!data) { | |
2334 | /* We support the non-activated case already */ | |
2335 | break; | |
2336 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
2337 | /* Values other than LBR and BTF are vendor-specific, | |
2338 | thus reserved and should throw a #GP */ | |
2339 | return 1; | |
2340 | } | |
a737f256 CD |
2341 | vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", |
2342 | __func__, data); | |
b5e2fec0 | 2343 | break; |
9ba075a6 | 2344 | case 0x200 ... 0x2ff: |
ff53604b | 2345 | return kvm_mtrr_set_msr(vcpu, msr, data); |
15c4a640 | 2346 | case MSR_IA32_APICBASE: |
58cb628d | 2347 | return kvm_set_apic_base(vcpu, msr_info); |
0105d1a5 GN |
2348 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
2349 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
a3e06bbe LJ |
2350 | case MSR_IA32_TSCDEADLINE: |
2351 | kvm_set_lapic_tscdeadline_msr(vcpu, data); | |
2352 | break; | |
ba904635 | 2353 | case MSR_IA32_TSC_ADJUST: |
d6321d49 | 2354 | if (guest_cpuid_has(vcpu, X86_FEATURE_TSC_ADJUST)) { |
ba904635 | 2355 | if (!msr_info->host_initiated) { |
d913b904 | 2356 | s64 adj = data - vcpu->arch.ia32_tsc_adjust_msr; |
d7add054 | 2357 | adjust_tsc_offset_guest(vcpu, adj); |
ba904635 WA |
2358 | } |
2359 | vcpu->arch.ia32_tsc_adjust_msr = data; | |
2360 | } | |
2361 | break; | |
15c4a640 | 2362 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 2363 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 2364 | break; |
64d60670 PB |
2365 | case MSR_IA32_SMBASE: |
2366 | if (!msr_info->host_initiated) | |
2367 | return 1; | |
2368 | vcpu->arch.smbase = data; | |
2369 | break; | |
dd259935 PB |
2370 | case MSR_IA32_TSC: |
2371 | kvm_write_tsc(vcpu, msr_info); | |
2372 | break; | |
52797bf9 LA |
2373 | case MSR_SMI_COUNT: |
2374 | if (!msr_info->host_initiated) | |
2375 | return 1; | |
2376 | vcpu->arch.smi_count = data; | |
2377 | break; | |
11c6bffa | 2378 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
2379 | case MSR_KVM_WALL_CLOCK: |
2380 | vcpu->kvm->arch.wall_clock = data; | |
2381 | kvm_write_wall_clock(vcpu->kvm, data); | |
2382 | break; | |
11c6bffa | 2383 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 | 2384 | case MSR_KVM_SYSTEM_TIME: { |
54750f2c MT |
2385 | struct kvm_arch *ka = &vcpu->kvm->arch; |
2386 | ||
12f9a48f | 2387 | kvmclock_reset(vcpu); |
18068523 | 2388 | |
54750f2c MT |
2389 | if (vcpu->vcpu_id == 0 && !msr_info->host_initiated) { |
2390 | bool tmp = (msr == MSR_KVM_SYSTEM_TIME); | |
2391 | ||
2392 | if (ka->boot_vcpu_runs_old_kvmclock != tmp) | |
1bd2009e | 2393 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
54750f2c MT |
2394 | |
2395 | ka->boot_vcpu_runs_old_kvmclock = tmp; | |
2396 | } | |
2397 | ||
18068523 | 2398 | vcpu->arch.time = data; |
0061d53d | 2399 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
18068523 GOC |
2400 | |
2401 | /* we verify if the enable bit is set... */ | |
2402 | if (!(data & 1)) | |
2403 | break; | |
2404 | ||
4e335d9e | 2405 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, |
8f964525 AH |
2406 | &vcpu->arch.pv_time, data & ~1ULL, |
2407 | sizeof(struct pvclock_vcpu_time_info))) | |
0b79459b AH |
2408 | vcpu->arch.pv_time_enabled = false; |
2409 | else | |
2410 | vcpu->arch.pv_time_enabled = true; | |
32cad84f | 2411 | |
18068523 GOC |
2412 | break; |
2413 | } | |
344d9588 GN |
2414 | case MSR_KVM_ASYNC_PF_EN: |
2415 | if (kvm_pv_enable_async_pf(vcpu, data)) | |
2416 | return 1; | |
2417 | break; | |
c9aaa895 GC |
2418 | case MSR_KVM_STEAL_TIME: |
2419 | ||
2420 | if (unlikely(!sched_info_on())) | |
2421 | return 1; | |
2422 | ||
2423 | if (data & KVM_STEAL_RESERVED_MASK) | |
2424 | return 1; | |
2425 | ||
4e335d9e | 2426 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.st.stime, |
8f964525 AH |
2427 | data & KVM_STEAL_VALID_BITS, |
2428 | sizeof(struct kvm_steal_time))) | |
c9aaa895 GC |
2429 | return 1; |
2430 | ||
2431 | vcpu->arch.st.msr_val = data; | |
2432 | ||
2433 | if (!(data & KVM_MSR_ENABLED)) | |
2434 | break; | |
2435 | ||
c9aaa895 GC |
2436 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); |
2437 | ||
2438 | break; | |
ae7a2a3f MT |
2439 | case MSR_KVM_PV_EOI_EN: |
2440 | if (kvm_lapic_enable_pv_eoi(vcpu, data)) | |
2441 | return 1; | |
2442 | break; | |
c9aaa895 | 2443 | |
890ca9ae HY |
2444 | case MSR_IA32_MCG_CTL: |
2445 | case MSR_IA32_MCG_STATUS: | |
81760dcc | 2446 | case MSR_IA32_MC0_CTL ... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS) - 1: |
9ffd986c | 2447 | return set_msr_mce(vcpu, msr_info); |
71db6023 | 2448 | |
6912ac32 WH |
2449 | case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3: |
2450 | case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1: | |
2451 | pr = true; /* fall through */ | |
2452 | case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3: | |
2453 | case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1: | |
c6702c9d | 2454 | if (kvm_pmu_is_valid_msr(vcpu, msr)) |
afd80d85 | 2455 | return kvm_pmu_set_msr(vcpu, msr_info); |
5753785f GN |
2456 | |
2457 | if (pr || data != 0) | |
a737f256 CD |
2458 | vcpu_unimpl(vcpu, "disabled perfctr wrmsr: " |
2459 | "0x%x data 0x%llx\n", msr, data); | |
5753785f | 2460 | break; |
84e0cefa JS |
2461 | case MSR_K7_CLK_CTL: |
2462 | /* | |
2463 | * Ignore all writes to this no longer documented MSR. | |
2464 | * Writes are only relevant for old K7 processors, | |
2465 | * all pre-dating SVM, but a recommended workaround from | |
4a969980 | 2466 | * AMD for these chips. It is possible to specify the |
84e0cefa JS |
2467 | * affected processor models on the command line, hence |
2468 | * the need to ignore the workaround. | |
2469 | */ | |
2470 | break; | |
55cd8e5a | 2471 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
e7d9513b AS |
2472 | case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: |
2473 | case HV_X64_MSR_CRASH_CTL: | |
1f4b34f8 | 2474 | case HV_X64_MSR_STIMER0_CONFIG ... HV_X64_MSR_STIMER3_COUNT: |
a2e164e7 VK |
2475 | case HV_X64_MSR_REENLIGHTENMENT_CONTROL: |
2476 | case HV_X64_MSR_TSC_EMULATION_CONTROL: | |
2477 | case HV_X64_MSR_TSC_EMULATION_STATUS: | |
e7d9513b AS |
2478 | return kvm_hv_set_msr_common(vcpu, msr, data, |
2479 | msr_info->host_initiated); | |
91c9c3ed | 2480 | case MSR_IA32_BBL_CR_CTL3: |
2481 | /* Drop writes to this legacy MSR -- see rdmsr | |
2482 | * counterpart for further detail. | |
2483 | */ | |
fab0aa3b EM |
2484 | if (report_ignored_msrs) |
2485 | vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data 0x%llx\n", | |
2486 | msr, data); | |
91c9c3ed | 2487 | break; |
2b036c6b | 2488 | case MSR_AMD64_OSVW_ID_LENGTH: |
d6321d49 | 2489 | if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW)) |
2b036c6b BO |
2490 | return 1; |
2491 | vcpu->arch.osvw.length = data; | |
2492 | break; | |
2493 | case MSR_AMD64_OSVW_STATUS: | |
d6321d49 | 2494 | if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW)) |
2b036c6b BO |
2495 | return 1; |
2496 | vcpu->arch.osvw.status = data; | |
2497 | break; | |
db2336a8 KH |
2498 | case MSR_PLATFORM_INFO: |
2499 | if (!msr_info->host_initiated || | |
2500 | data & ~MSR_PLATFORM_INFO_CPUID_FAULT || | |
2501 | (!(data & MSR_PLATFORM_INFO_CPUID_FAULT) && | |
2502 | cpuid_fault_enabled(vcpu))) | |
2503 | return 1; | |
2504 | vcpu->arch.msr_platform_info = data; | |
2505 | break; | |
2506 | case MSR_MISC_FEATURES_ENABLES: | |
2507 | if (data & ~MSR_MISC_FEATURES_ENABLES_CPUID_FAULT || | |
2508 | (data & MSR_MISC_FEATURES_ENABLES_CPUID_FAULT && | |
2509 | !supports_cpuid_fault(vcpu))) | |
2510 | return 1; | |
2511 | vcpu->arch.msr_misc_features_enables = data; | |
2512 | break; | |
15c4a640 | 2513 | default: |
ffde22ac ES |
2514 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
2515 | return xen_hvm_config(vcpu, data); | |
c6702c9d | 2516 | if (kvm_pmu_is_valid_msr(vcpu, msr)) |
afd80d85 | 2517 | return kvm_pmu_set_msr(vcpu, msr_info); |
ed85c068 | 2518 | if (!ignore_msrs) { |
ae0f5499 | 2519 | vcpu_debug_ratelimited(vcpu, "unhandled wrmsr: 0x%x data 0x%llx\n", |
a737f256 | 2520 | msr, data); |
ed85c068 AP |
2521 | return 1; |
2522 | } else { | |
fab0aa3b EM |
2523 | if (report_ignored_msrs) |
2524 | vcpu_unimpl(vcpu, | |
2525 | "ignored wrmsr: 0x%x data 0x%llx\n", | |
2526 | msr, data); | |
ed85c068 AP |
2527 | break; |
2528 | } | |
15c4a640 CO |
2529 | } |
2530 | return 0; | |
2531 | } | |
2532 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
2533 | ||
2534 | ||
2535 | /* | |
2536 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
2537 | * Returns 0 on success, non-0 otherwise. | |
2538 | * Assumes vcpu_load() was already called. | |
2539 | */ | |
609e36d3 | 2540 | int kvm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr) |
15c4a640 | 2541 | { |
609e36d3 | 2542 | return kvm_x86_ops->get_msr(vcpu, msr); |
15c4a640 | 2543 | } |
ff651cb6 | 2544 | EXPORT_SYMBOL_GPL(kvm_get_msr); |
15c4a640 | 2545 | |
890ca9ae | 2546 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
2547 | { |
2548 | u64 data; | |
890ca9ae HY |
2549 | u64 mcg_cap = vcpu->arch.mcg_cap; |
2550 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
2551 | |
2552 | switch (msr) { | |
15c4a640 CO |
2553 | case MSR_IA32_P5_MC_ADDR: |
2554 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
2555 | data = 0; |
2556 | break; | |
15c4a640 | 2557 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
2558 | data = vcpu->arch.mcg_cap; |
2559 | break; | |
c7ac679c | 2560 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
2561 | if (!(mcg_cap & MCG_CTL_P)) |
2562 | return 1; | |
2563 | data = vcpu->arch.mcg_ctl; | |
2564 | break; | |
2565 | case MSR_IA32_MCG_STATUS: | |
2566 | data = vcpu->arch.mcg_status; | |
2567 | break; | |
2568 | default: | |
2569 | if (msr >= MSR_IA32_MC0_CTL && | |
81760dcc | 2570 | msr < MSR_IA32_MCx_CTL(bank_num)) { |
890ca9ae HY |
2571 | u32 offset = msr - MSR_IA32_MC0_CTL; |
2572 | data = vcpu->arch.mce_banks[offset]; | |
2573 | break; | |
2574 | } | |
2575 | return 1; | |
2576 | } | |
2577 | *pdata = data; | |
2578 | return 0; | |
2579 | } | |
2580 | ||
609e36d3 | 2581 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
890ca9ae | 2582 | { |
609e36d3 | 2583 | switch (msr_info->index) { |
890ca9ae | 2584 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 2585 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
2586 | case MSR_IA32_DEBUGCTLMSR: |
2587 | case MSR_IA32_LASTBRANCHFROMIP: | |
2588 | case MSR_IA32_LASTBRANCHTOIP: | |
2589 | case MSR_IA32_LASTINTFROMIP: | |
2590 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd | 2591 | case MSR_K8_SYSCFG: |
3afb1121 PB |
2592 | case MSR_K8_TSEG_ADDR: |
2593 | case MSR_K8_TSEG_MASK: | |
60af2ecd | 2594 | case MSR_K7_HWCR: |
61a6bd67 | 2595 | case MSR_VM_HSAVE_PA: |
1fdbd48c | 2596 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 2597 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 2598 | case MSR_FAM10H_MMIO_CONF_BASE: |
2e32b719 | 2599 | case MSR_AMD64_BU_CFG2: |
0c2df2a1 | 2600 | case MSR_IA32_PERF_CTL: |
405a353a | 2601 | case MSR_AMD64_DC_CFG: |
609e36d3 | 2602 | msr_info->data = 0; |
15c4a640 | 2603 | break; |
c51eb52b | 2604 | case MSR_F15H_PERF_CTL0 ... MSR_F15H_PERF_CTR5: |
6912ac32 WH |
2605 | case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3: |
2606 | case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3: | |
2607 | case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1: | |
2608 | case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1: | |
c6702c9d | 2609 | if (kvm_pmu_is_valid_msr(vcpu, msr_info->index)) |
609e36d3 PB |
2610 | return kvm_pmu_get_msr(vcpu, msr_info->index, &msr_info->data); |
2611 | msr_info->data = 0; | |
5753785f | 2612 | break; |
742bc670 | 2613 | case MSR_IA32_UCODE_REV: |
518e7b94 | 2614 | msr_info->data = vcpu->arch.microcode_version; |
742bc670 | 2615 | break; |
dd259935 PB |
2616 | case MSR_IA32_TSC: |
2617 | msr_info->data = kvm_scale_tsc(vcpu, rdtsc()) + vcpu->arch.tsc_offset; | |
2618 | break; | |
9ba075a6 | 2619 | case MSR_MTRRcap: |
9ba075a6 | 2620 | case 0x200 ... 0x2ff: |
ff53604b | 2621 | return kvm_mtrr_get_msr(vcpu, msr_info->index, &msr_info->data); |
15c4a640 | 2622 | case 0xcd: /* fsb frequency */ |
609e36d3 | 2623 | msr_info->data = 3; |
15c4a640 | 2624 | break; |
7b914098 JS |
2625 | /* |
2626 | * MSR_EBC_FREQUENCY_ID | |
2627 | * Conservative value valid for even the basic CPU models. | |
2628 | * Models 0,1: 000 in bits 23:21 indicating a bus speed of | |
2629 | * 100MHz, model 2 000 in bits 18:16 indicating 100MHz, | |
2630 | * and 266MHz for model 3, or 4. Set Core Clock | |
2631 | * Frequency to System Bus Frequency Ratio to 1 (bits | |
2632 | * 31:24) even though these are only valid for CPU | |
2633 | * models > 2, however guests may end up dividing or | |
2634 | * multiplying by zero otherwise. | |
2635 | */ | |
2636 | case MSR_EBC_FREQUENCY_ID: | |
609e36d3 | 2637 | msr_info->data = 1 << 24; |
7b914098 | 2638 | break; |
15c4a640 | 2639 | case MSR_IA32_APICBASE: |
609e36d3 | 2640 | msr_info->data = kvm_get_apic_base(vcpu); |
15c4a640 | 2641 | break; |
0105d1a5 | 2642 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
609e36d3 | 2643 | return kvm_x2apic_msr_read(vcpu, msr_info->index, &msr_info->data); |
0105d1a5 | 2644 | break; |
a3e06bbe | 2645 | case MSR_IA32_TSCDEADLINE: |
609e36d3 | 2646 | msr_info->data = kvm_get_lapic_tscdeadline_msr(vcpu); |
a3e06bbe | 2647 | break; |
ba904635 | 2648 | case MSR_IA32_TSC_ADJUST: |
609e36d3 | 2649 | msr_info->data = (u64)vcpu->arch.ia32_tsc_adjust_msr; |
ba904635 | 2650 | break; |
15c4a640 | 2651 | case MSR_IA32_MISC_ENABLE: |
609e36d3 | 2652 | msr_info->data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 2653 | break; |
64d60670 PB |
2654 | case MSR_IA32_SMBASE: |
2655 | if (!msr_info->host_initiated) | |
2656 | return 1; | |
2657 | msr_info->data = vcpu->arch.smbase; | |
15c4a640 | 2658 | break; |
52797bf9 LA |
2659 | case MSR_SMI_COUNT: |
2660 | msr_info->data = vcpu->arch.smi_count; | |
2661 | break; | |
847f0ad8 AG |
2662 | case MSR_IA32_PERF_STATUS: |
2663 | /* TSC increment by tick */ | |
609e36d3 | 2664 | msr_info->data = 1000ULL; |
847f0ad8 | 2665 | /* CPU multiplier */ |
b0996ae4 | 2666 | msr_info->data |= (((uint64_t)4ULL) << 40); |
847f0ad8 | 2667 | break; |
15c4a640 | 2668 | case MSR_EFER: |
609e36d3 | 2669 | msr_info->data = vcpu->arch.efer; |
15c4a640 | 2670 | break; |
18068523 | 2671 | case MSR_KVM_WALL_CLOCK: |
11c6bffa | 2672 | case MSR_KVM_WALL_CLOCK_NEW: |
609e36d3 | 2673 | msr_info->data = vcpu->kvm->arch.wall_clock; |
18068523 GOC |
2674 | break; |
2675 | case MSR_KVM_SYSTEM_TIME: | |
11c6bffa | 2676 | case MSR_KVM_SYSTEM_TIME_NEW: |
609e36d3 | 2677 | msr_info->data = vcpu->arch.time; |
18068523 | 2678 | break; |
344d9588 | 2679 | case MSR_KVM_ASYNC_PF_EN: |
609e36d3 | 2680 | msr_info->data = vcpu->arch.apf.msr_val; |
344d9588 | 2681 | break; |
c9aaa895 | 2682 | case MSR_KVM_STEAL_TIME: |
609e36d3 | 2683 | msr_info->data = vcpu->arch.st.msr_val; |
c9aaa895 | 2684 | break; |
1d92128f | 2685 | case MSR_KVM_PV_EOI_EN: |
609e36d3 | 2686 | msr_info->data = vcpu->arch.pv_eoi.msr_val; |
1d92128f | 2687 | break; |
890ca9ae HY |
2688 | case MSR_IA32_P5_MC_ADDR: |
2689 | case MSR_IA32_P5_MC_TYPE: | |
2690 | case MSR_IA32_MCG_CAP: | |
2691 | case MSR_IA32_MCG_CTL: | |
2692 | case MSR_IA32_MCG_STATUS: | |
81760dcc | 2693 | case MSR_IA32_MC0_CTL ... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS) - 1: |
609e36d3 | 2694 | return get_msr_mce(vcpu, msr_info->index, &msr_info->data); |
84e0cefa JS |
2695 | case MSR_K7_CLK_CTL: |
2696 | /* | |
2697 | * Provide expected ramp-up count for K7. All other | |
2698 | * are set to zero, indicating minimum divisors for | |
2699 | * every field. | |
2700 | * | |
2701 | * This prevents guest kernels on AMD host with CPU | |
2702 | * type 6, model 8 and higher from exploding due to | |
2703 | * the rdmsr failing. | |
2704 | */ | |
609e36d3 | 2705 | msr_info->data = 0x20000000; |
84e0cefa | 2706 | break; |
55cd8e5a | 2707 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
e7d9513b AS |
2708 | case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: |
2709 | case HV_X64_MSR_CRASH_CTL: | |
1f4b34f8 | 2710 | case HV_X64_MSR_STIMER0_CONFIG ... HV_X64_MSR_STIMER3_COUNT: |
a2e164e7 VK |
2711 | case HV_X64_MSR_REENLIGHTENMENT_CONTROL: |
2712 | case HV_X64_MSR_TSC_EMULATION_CONTROL: | |
2713 | case HV_X64_MSR_TSC_EMULATION_STATUS: | |
e83d5887 AS |
2714 | return kvm_hv_get_msr_common(vcpu, |
2715 | msr_info->index, &msr_info->data); | |
55cd8e5a | 2716 | break; |
91c9c3ed | 2717 | case MSR_IA32_BBL_CR_CTL3: |
2718 | /* This legacy MSR exists but isn't fully documented in current | |
2719 | * silicon. It is however accessed by winxp in very narrow | |
2720 | * scenarios where it sets bit #19, itself documented as | |
2721 | * a "reserved" bit. Best effort attempt to source coherent | |
2722 | * read data here should the balance of the register be | |
2723 | * interpreted by the guest: | |
2724 | * | |
2725 | * L2 cache control register 3: 64GB range, 256KB size, | |
2726 | * enabled, latency 0x1, configured | |
2727 | */ | |
609e36d3 | 2728 | msr_info->data = 0xbe702111; |
91c9c3ed | 2729 | break; |
2b036c6b | 2730 | case MSR_AMD64_OSVW_ID_LENGTH: |
d6321d49 | 2731 | if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW)) |
2b036c6b | 2732 | return 1; |
609e36d3 | 2733 | msr_info->data = vcpu->arch.osvw.length; |
2b036c6b BO |
2734 | break; |
2735 | case MSR_AMD64_OSVW_STATUS: | |
d6321d49 | 2736 | if (!guest_cpuid_has(vcpu, X86_FEATURE_OSVW)) |
2b036c6b | 2737 | return 1; |
609e36d3 | 2738 | msr_info->data = vcpu->arch.osvw.status; |
2b036c6b | 2739 | break; |
db2336a8 KH |
2740 | case MSR_PLATFORM_INFO: |
2741 | msr_info->data = vcpu->arch.msr_platform_info; | |
2742 | break; | |
2743 | case MSR_MISC_FEATURES_ENABLES: | |
2744 | msr_info->data = vcpu->arch.msr_misc_features_enables; | |
2745 | break; | |
15c4a640 | 2746 | default: |
c6702c9d | 2747 | if (kvm_pmu_is_valid_msr(vcpu, msr_info->index)) |
609e36d3 | 2748 | return kvm_pmu_get_msr(vcpu, msr_info->index, &msr_info->data); |
ed85c068 | 2749 | if (!ignore_msrs) { |
ae0f5499 BD |
2750 | vcpu_debug_ratelimited(vcpu, "unhandled rdmsr: 0x%x\n", |
2751 | msr_info->index); | |
ed85c068 AP |
2752 | return 1; |
2753 | } else { | |
fab0aa3b EM |
2754 | if (report_ignored_msrs) |
2755 | vcpu_unimpl(vcpu, "ignored rdmsr: 0x%x\n", | |
2756 | msr_info->index); | |
609e36d3 | 2757 | msr_info->data = 0; |
ed85c068 AP |
2758 | } |
2759 | break; | |
15c4a640 | 2760 | } |
15c4a640 CO |
2761 | return 0; |
2762 | } | |
2763 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
2764 | ||
313a3dc7 CO |
2765 | /* |
2766 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
2767 | * | |
2768 | * @return number of msrs set successfully. | |
2769 | */ | |
2770 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
2771 | struct kvm_msr_entry *entries, | |
2772 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2773 | unsigned index, u64 *data)) | |
2774 | { | |
801e459a | 2775 | int i; |
313a3dc7 | 2776 | |
313a3dc7 CO |
2777 | for (i = 0; i < msrs->nmsrs; ++i) |
2778 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2779 | break; | |
2780 | ||
313a3dc7 CO |
2781 | return i; |
2782 | } | |
2783 | ||
2784 | /* | |
2785 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2786 | * | |
2787 | * @return number of msrs set successfully. | |
2788 | */ | |
2789 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
2790 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2791 | unsigned index, u64 *data), | |
2792 | int writeback) | |
2793 | { | |
2794 | struct kvm_msrs msrs; | |
2795 | struct kvm_msr_entry *entries; | |
2796 | int r, n; | |
2797 | unsigned size; | |
2798 | ||
2799 | r = -EFAULT; | |
2800 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
2801 | goto out; | |
2802 | ||
2803 | r = -E2BIG; | |
2804 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2805 | goto out; | |
2806 | ||
313a3dc7 | 2807 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; |
ff5c2c03 SL |
2808 | entries = memdup_user(user_msrs->entries, size); |
2809 | if (IS_ERR(entries)) { | |
2810 | r = PTR_ERR(entries); | |
313a3dc7 | 2811 | goto out; |
ff5c2c03 | 2812 | } |
313a3dc7 CO |
2813 | |
2814 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
2815 | if (r < 0) | |
2816 | goto out_free; | |
2817 | ||
2818 | r = -EFAULT; | |
2819 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2820 | goto out_free; | |
2821 | ||
2822 | r = n; | |
2823 | ||
2824 | out_free: | |
7a73c028 | 2825 | kfree(entries); |
313a3dc7 CO |
2826 | out: |
2827 | return r; | |
2828 | } | |
2829 | ||
4d5422ce WL |
2830 | static inline bool kvm_can_mwait_in_guest(void) |
2831 | { | |
2832 | return boot_cpu_has(X86_FEATURE_MWAIT) && | |
8e9b29b6 KA |
2833 | !boot_cpu_has_bug(X86_BUG_MONITOR) && |
2834 | boot_cpu_has(X86_FEATURE_ARAT); | |
4d5422ce WL |
2835 | } |
2836 | ||
784aa3d7 | 2837 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
018d00d2 | 2838 | { |
4d5422ce | 2839 | int r = 0; |
018d00d2 ZX |
2840 | |
2841 | switch (ext) { | |
2842 | case KVM_CAP_IRQCHIP: | |
2843 | case KVM_CAP_HLT: | |
2844 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 2845 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 2846 | case KVM_CAP_EXT_CPUID: |
9c15bb1d | 2847 | case KVM_CAP_EXT_EMUL_CPUID: |
c8076604 | 2848 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 2849 | case KVM_CAP_PIT: |
a28e4f5a | 2850 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 2851 | case KVM_CAP_MP_STATE: |
ed848624 | 2852 | case KVM_CAP_SYNC_MMU: |
a355c85c | 2853 | case KVM_CAP_USER_NMI: |
52d939a0 | 2854 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 2855 | case KVM_CAP_IRQ_INJECT_STATUS: |
d34e6b17 | 2856 | case KVM_CAP_IOEVENTFD: |
f848a5a8 | 2857 | case KVM_CAP_IOEVENTFD_NO_LENGTH: |
c5ff41ce | 2858 | case KVM_CAP_PIT2: |
e9f42757 | 2859 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 2860 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 2861 | case KVM_CAP_XEN_HVM: |
3cfc3092 | 2862 | case KVM_CAP_VCPU_EVENTS: |
55cd8e5a | 2863 | case KVM_CAP_HYPERV: |
10388a07 | 2864 | case KVM_CAP_HYPERV_VAPIC: |
c25bc163 | 2865 | case KVM_CAP_HYPERV_SPIN: |
5c919412 | 2866 | case KVM_CAP_HYPERV_SYNIC: |
efc479e6 | 2867 | case KVM_CAP_HYPERV_SYNIC2: |
d3457c87 | 2868 | case KVM_CAP_HYPERV_VP_INDEX: |
faeb7833 | 2869 | case KVM_CAP_HYPERV_EVENTFD: |
ab9f4ecb | 2870 | case KVM_CAP_PCI_SEGMENT: |
a1efbe77 | 2871 | case KVM_CAP_DEBUGREGS: |
d2be1651 | 2872 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
2d5b5a66 | 2873 | case KVM_CAP_XSAVE: |
344d9588 | 2874 | case KVM_CAP_ASYNC_PF: |
92a1f12d | 2875 | case KVM_CAP_GET_TSC_KHZ: |
1c0b28c2 | 2876 | case KVM_CAP_KVMCLOCK_CTRL: |
4d8b81ab | 2877 | case KVM_CAP_READONLY_MEM: |
5f66b620 | 2878 | case KVM_CAP_HYPERV_TIME: |
100943c5 | 2879 | case KVM_CAP_IOAPIC_POLARITY_IGNORED: |
defcf51f | 2880 | case KVM_CAP_TSC_DEADLINE_TIMER: |
90de4a18 NA |
2881 | case KVM_CAP_ENABLE_CAP_VM: |
2882 | case KVM_CAP_DISABLE_QUIRKS: | |
d71ba788 | 2883 | case KVM_CAP_SET_BOOT_CPU_ID: |
49df6397 | 2884 | case KVM_CAP_SPLIT_IRQCHIP: |
460df4c1 | 2885 | case KVM_CAP_IMMEDIATE_EXIT: |
801e459a | 2886 | case KVM_CAP_GET_MSR_FEATURES: |
018d00d2 ZX |
2887 | r = 1; |
2888 | break; | |
01643c51 KH |
2889 | case KVM_CAP_SYNC_REGS: |
2890 | r = KVM_SYNC_X86_VALID_FIELDS; | |
2891 | break; | |
e3fd9a93 PB |
2892 | case KVM_CAP_ADJUST_CLOCK: |
2893 | r = KVM_CLOCK_TSC_STABLE; | |
2894 | break; | |
4d5422ce | 2895 | case KVM_CAP_X86_DISABLE_EXITS: |
b31c114b | 2896 | r |= KVM_X86_DISABLE_EXITS_HTL | KVM_X86_DISABLE_EXITS_PAUSE; |
4d5422ce WL |
2897 | if(kvm_can_mwait_in_guest()) |
2898 | r |= KVM_X86_DISABLE_EXITS_MWAIT; | |
668fffa3 | 2899 | break; |
6d396b55 PB |
2900 | case KVM_CAP_X86_SMM: |
2901 | /* SMBASE is usually relocated above 1M on modern chipsets, | |
2902 | * and SMM handlers might indeed rely on 4G segment limits, | |
2903 | * so do not report SMM to be available if real mode is | |
2904 | * emulated via vm86 mode. Still, do not go to great lengths | |
2905 | * to avoid userspace's usage of the feature, because it is a | |
2906 | * fringe case that is not enabled except via specific settings | |
2907 | * of the module parameters. | |
2908 | */ | |
2909 | r = kvm_x86_ops->cpu_has_high_real_mode_segbase(); | |
2910 | break; | |
774ead3a AK |
2911 | case KVM_CAP_VAPIC: |
2912 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
2913 | break; | |
f725230a | 2914 | case KVM_CAP_NR_VCPUS: |
8c3ba334 SL |
2915 | r = KVM_SOFT_MAX_VCPUS; |
2916 | break; | |
2917 | case KVM_CAP_MAX_VCPUS: | |
f725230a AK |
2918 | r = KVM_MAX_VCPUS; |
2919 | break; | |
a988b910 | 2920 | case KVM_CAP_NR_MEMSLOTS: |
bbacc0c1 | 2921 | r = KVM_USER_MEM_SLOTS; |
a988b910 | 2922 | break; |
a68a6a72 MT |
2923 | case KVM_CAP_PV_MMU: /* obsolete */ |
2924 | r = 0; | |
2f333bcb | 2925 | break; |
890ca9ae HY |
2926 | case KVM_CAP_MCE: |
2927 | r = KVM_MAX_MCE_BANKS; | |
2928 | break; | |
2d5b5a66 | 2929 | case KVM_CAP_XCRS: |
d366bf7e | 2930 | r = boot_cpu_has(X86_FEATURE_XSAVE); |
2d5b5a66 | 2931 | break; |
92a1f12d JR |
2932 | case KVM_CAP_TSC_CONTROL: |
2933 | r = kvm_has_tsc_control; | |
2934 | break; | |
37131313 RK |
2935 | case KVM_CAP_X2APIC_API: |
2936 | r = KVM_X2APIC_API_VALID_FLAGS; | |
2937 | break; | |
018d00d2 | 2938 | default: |
018d00d2 ZX |
2939 | break; |
2940 | } | |
2941 | return r; | |
2942 | ||
2943 | } | |
2944 | ||
043405e1 CO |
2945 | long kvm_arch_dev_ioctl(struct file *filp, |
2946 | unsigned int ioctl, unsigned long arg) | |
2947 | { | |
2948 | void __user *argp = (void __user *)arg; | |
2949 | long r; | |
2950 | ||
2951 | switch (ioctl) { | |
2952 | case KVM_GET_MSR_INDEX_LIST: { | |
2953 | struct kvm_msr_list __user *user_msr_list = argp; | |
2954 | struct kvm_msr_list msr_list; | |
2955 | unsigned n; | |
2956 | ||
2957 | r = -EFAULT; | |
2958 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
2959 | goto out; | |
2960 | n = msr_list.nmsrs; | |
62ef68bb | 2961 | msr_list.nmsrs = num_msrs_to_save + num_emulated_msrs; |
043405e1 CO |
2962 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
2963 | goto out; | |
2964 | r = -E2BIG; | |
e125e7b6 | 2965 | if (n < msr_list.nmsrs) |
043405e1 CO |
2966 | goto out; |
2967 | r = -EFAULT; | |
2968 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
2969 | num_msrs_to_save * sizeof(u32))) | |
2970 | goto out; | |
e125e7b6 | 2971 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 | 2972 | &emulated_msrs, |
62ef68bb | 2973 | num_emulated_msrs * sizeof(u32))) |
043405e1 CO |
2974 | goto out; |
2975 | r = 0; | |
2976 | break; | |
2977 | } | |
9c15bb1d BP |
2978 | case KVM_GET_SUPPORTED_CPUID: |
2979 | case KVM_GET_EMULATED_CPUID: { | |
674eea0f AK |
2980 | struct kvm_cpuid2 __user *cpuid_arg = argp; |
2981 | struct kvm_cpuid2 cpuid; | |
2982 | ||
2983 | r = -EFAULT; | |
2984 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2985 | goto out; | |
9c15bb1d BP |
2986 | |
2987 | r = kvm_dev_ioctl_get_cpuid(&cpuid, cpuid_arg->entries, | |
2988 | ioctl); | |
674eea0f AK |
2989 | if (r) |
2990 | goto out; | |
2991 | ||
2992 | r = -EFAULT; | |
2993 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2994 | goto out; | |
2995 | r = 0; | |
2996 | break; | |
2997 | } | |
890ca9ae | 2998 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
890ca9ae | 2999 | r = -EFAULT; |
c45dcc71 AR |
3000 | if (copy_to_user(argp, &kvm_mce_cap_supported, |
3001 | sizeof(kvm_mce_cap_supported))) | |
890ca9ae HY |
3002 | goto out; |
3003 | r = 0; | |
3004 | break; | |
801e459a TL |
3005 | case KVM_GET_MSR_FEATURE_INDEX_LIST: { |
3006 | struct kvm_msr_list __user *user_msr_list = argp; | |
3007 | struct kvm_msr_list msr_list; | |
3008 | unsigned int n; | |
3009 | ||
3010 | r = -EFAULT; | |
3011 | if (copy_from_user(&msr_list, user_msr_list, sizeof(msr_list))) | |
3012 | goto out; | |
3013 | n = msr_list.nmsrs; | |
3014 | msr_list.nmsrs = num_msr_based_features; | |
3015 | if (copy_to_user(user_msr_list, &msr_list, sizeof(msr_list))) | |
3016 | goto out; | |
3017 | r = -E2BIG; | |
3018 | if (n < msr_list.nmsrs) | |
3019 | goto out; | |
3020 | r = -EFAULT; | |
3021 | if (copy_to_user(user_msr_list->indices, &msr_based_features, | |
3022 | num_msr_based_features * sizeof(u32))) | |
3023 | goto out; | |
3024 | r = 0; | |
3025 | break; | |
3026 | } | |
3027 | case KVM_GET_MSRS: | |
3028 | r = msr_io(NULL, argp, do_get_msr_feature, 1); | |
3029 | break; | |
890ca9ae | 3030 | } |
043405e1 CO |
3031 | default: |
3032 | r = -EINVAL; | |
3033 | } | |
3034 | out: | |
3035 | return r; | |
3036 | } | |
3037 | ||
f5f48ee1 SY |
3038 | static void wbinvd_ipi(void *garbage) |
3039 | { | |
3040 | wbinvd(); | |
3041 | } | |
3042 | ||
3043 | static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
3044 | { | |
e0f0bbc5 | 3045 | return kvm_arch_has_noncoherent_dma(vcpu->kvm); |
f5f48ee1 SY |
3046 | } |
3047 | ||
313a3dc7 CO |
3048 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
3049 | { | |
f5f48ee1 SY |
3050 | /* Address WBINVD may be executed by guest */ |
3051 | if (need_emulate_wbinvd(vcpu)) { | |
3052 | if (kvm_x86_ops->has_wbinvd_exit()) | |
3053 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
3054 | else if (vcpu->cpu != -1 && vcpu->cpu != cpu) | |
3055 | smp_call_function_single(vcpu->cpu, | |
3056 | wbinvd_ipi, NULL, 1); | |
3057 | } | |
3058 | ||
313a3dc7 | 3059 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
8f6055cb | 3060 | |
0dd6a6ed ZA |
3061 | /* Apply any externally detected TSC adjustments (due to suspend) */ |
3062 | if (unlikely(vcpu->arch.tsc_offset_adjustment)) { | |
3063 | adjust_tsc_offset_host(vcpu, vcpu->arch.tsc_offset_adjustment); | |
3064 | vcpu->arch.tsc_offset_adjustment = 0; | |
105b21bb | 3065 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0dd6a6ed | 3066 | } |
8f6055cb | 3067 | |
b0c39dc6 | 3068 | if (unlikely(vcpu->cpu != cpu) || kvm_check_tsc_unstable()) { |
6f526ec5 | 3069 | s64 tsc_delta = !vcpu->arch.last_host_tsc ? 0 : |
4ea1636b | 3070 | rdtsc() - vcpu->arch.last_host_tsc; |
e48672fa ZA |
3071 | if (tsc_delta < 0) |
3072 | mark_tsc_unstable("KVM discovered backwards TSC"); | |
ce7a058a | 3073 | |
b0c39dc6 | 3074 | if (kvm_check_tsc_unstable()) { |
07c1419a | 3075 | u64 offset = kvm_compute_tsc_offset(vcpu, |
b183aa58 | 3076 | vcpu->arch.last_guest_tsc); |
a545ab6a | 3077 | kvm_vcpu_write_tsc_offset(vcpu, offset); |
c285545f | 3078 | vcpu->arch.tsc_catchup = 1; |
c285545f | 3079 | } |
a749e247 PB |
3080 | |
3081 | if (kvm_lapic_hv_timer_in_use(vcpu)) | |
3082 | kvm_lapic_restart_hv_timer(vcpu); | |
3083 | ||
d98d07ca MT |
3084 | /* |
3085 | * On a host with synchronized TSC, there is no need to update | |
3086 | * kvmclock on vcpu->cpu migration | |
3087 | */ | |
3088 | if (!vcpu->kvm->arch.use_master_clock || vcpu->cpu == -1) | |
0061d53d | 3089 | kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu); |
c285545f | 3090 | if (vcpu->cpu != cpu) |
1bd2009e | 3091 | kvm_make_request(KVM_REQ_MIGRATE_TIMER, vcpu); |
e48672fa | 3092 | vcpu->cpu = cpu; |
6b7d7e76 | 3093 | } |
c9aaa895 | 3094 | |
c9aaa895 | 3095 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); |
313a3dc7 CO |
3096 | } |
3097 | ||
0b9f6c46 PX |
3098 | static void kvm_steal_time_set_preempted(struct kvm_vcpu *vcpu) |
3099 | { | |
3100 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
3101 | return; | |
3102 | ||
fa55eedd | 3103 | vcpu->arch.st.steal.preempted = KVM_VCPU_PREEMPTED; |
0b9f6c46 | 3104 | |
4e335d9e | 3105 | kvm_write_guest_offset_cached(vcpu->kvm, &vcpu->arch.st.stime, |
0b9f6c46 PX |
3106 | &vcpu->arch.st.steal.preempted, |
3107 | offsetof(struct kvm_steal_time, preempted), | |
3108 | sizeof(vcpu->arch.st.steal.preempted)); | |
3109 | } | |
3110 | ||
313a3dc7 CO |
3111 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
3112 | { | |
cc0d907c | 3113 | int idx; |
de63ad4c LM |
3114 | |
3115 | if (vcpu->preempted) | |
3116 | vcpu->arch.preempted_in_kernel = !kvm_x86_ops->get_cpl(vcpu); | |
3117 | ||
931f261b AA |
3118 | /* |
3119 | * Disable page faults because we're in atomic context here. | |
3120 | * kvm_write_guest_offset_cached() would call might_fault() | |
3121 | * that relies on pagefault_disable() to tell if there's a | |
3122 | * bug. NOTE: the write to guest memory may not go through if | |
3123 | * during postcopy live migration or if there's heavy guest | |
3124 | * paging. | |
3125 | */ | |
3126 | pagefault_disable(); | |
cc0d907c AA |
3127 | /* |
3128 | * kvm_memslots() will be called by | |
3129 | * kvm_write_guest_offset_cached() so take the srcu lock. | |
3130 | */ | |
3131 | idx = srcu_read_lock(&vcpu->kvm->srcu); | |
0b9f6c46 | 3132 | kvm_steal_time_set_preempted(vcpu); |
cc0d907c | 3133 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
931f261b | 3134 | pagefault_enable(); |
02daab21 | 3135 | kvm_x86_ops->vcpu_put(vcpu); |
4ea1636b | 3136 | vcpu->arch.last_host_tsc = rdtsc(); |
efdab992 WL |
3137 | /* |
3138 | * If userspace has set any breakpoints or watchpoints, dr6 is restored | |
3139 | * on every vmexit, but if not, we might have a stale dr6 from the | |
3140 | * guest. do_debug expects dr6 to be cleared after it runs, do the same. | |
3141 | */ | |
3142 | set_debugreg(0, 6); | |
313a3dc7 CO |
3143 | } |
3144 | ||
313a3dc7 CO |
3145 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
3146 | struct kvm_lapic_state *s) | |
3147 | { | |
fa59cc00 | 3148 | if (vcpu->arch.apicv_active) |
d62caabb AS |
3149 | kvm_x86_ops->sync_pir_to_irr(vcpu); |
3150 | ||
a92e2543 | 3151 | return kvm_apic_get_state(vcpu, s); |
313a3dc7 CO |
3152 | } |
3153 | ||
3154 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
3155 | struct kvm_lapic_state *s) | |
3156 | { | |
a92e2543 RK |
3157 | int r; |
3158 | ||
3159 | r = kvm_apic_set_state(vcpu, s); | |
3160 | if (r) | |
3161 | return r; | |
cb142eb7 | 3162 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
3163 | |
3164 | return 0; | |
3165 | } | |
3166 | ||
127a457a MG |
3167 | static int kvm_cpu_accept_dm_intr(struct kvm_vcpu *vcpu) |
3168 | { | |
3169 | return (!lapic_in_kernel(vcpu) || | |
3170 | kvm_apic_accept_pic_intr(vcpu)); | |
3171 | } | |
3172 | ||
782d422b MG |
3173 | /* |
3174 | * if userspace requested an interrupt window, check that the | |
3175 | * interrupt window is open. | |
3176 | * | |
3177 | * No need to exit to userspace if we already have an interrupt queued. | |
3178 | */ | |
3179 | static int kvm_vcpu_ready_for_interrupt_injection(struct kvm_vcpu *vcpu) | |
3180 | { | |
3181 | return kvm_arch_interrupt_allowed(vcpu) && | |
3182 | !kvm_cpu_has_interrupt(vcpu) && | |
3183 | !kvm_event_needs_reinjection(vcpu) && | |
3184 | kvm_cpu_accept_dm_intr(vcpu); | |
3185 | } | |
3186 | ||
f77bc6a4 ZX |
3187 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
3188 | struct kvm_interrupt *irq) | |
3189 | { | |
02cdb50f | 3190 | if (irq->irq >= KVM_NR_INTERRUPTS) |
f77bc6a4 | 3191 | return -EINVAL; |
1c1a9ce9 SR |
3192 | |
3193 | if (!irqchip_in_kernel(vcpu->kvm)) { | |
3194 | kvm_queue_interrupt(vcpu, irq->irq, false); | |
3195 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
3196 | return 0; | |
3197 | } | |
3198 | ||
3199 | /* | |
3200 | * With in-kernel LAPIC, we only use this to inject EXTINT, so | |
3201 | * fail for in-kernel 8259. | |
3202 | */ | |
3203 | if (pic_in_kernel(vcpu->kvm)) | |
f77bc6a4 | 3204 | return -ENXIO; |
f77bc6a4 | 3205 | |
1c1a9ce9 SR |
3206 | if (vcpu->arch.pending_external_vector != -1) |
3207 | return -EEXIST; | |
f77bc6a4 | 3208 | |
1c1a9ce9 | 3209 | vcpu->arch.pending_external_vector = irq->irq; |
934bf653 | 3210 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f77bc6a4 ZX |
3211 | return 0; |
3212 | } | |
3213 | ||
c4abb7c9 JK |
3214 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
3215 | { | |
c4abb7c9 | 3216 | kvm_inject_nmi(vcpu); |
c4abb7c9 JK |
3217 | |
3218 | return 0; | |
3219 | } | |
3220 | ||
f077825a PB |
3221 | static int kvm_vcpu_ioctl_smi(struct kvm_vcpu *vcpu) |
3222 | { | |
64d60670 PB |
3223 | kvm_make_request(KVM_REQ_SMI, vcpu); |
3224 | ||
f077825a PB |
3225 | return 0; |
3226 | } | |
3227 | ||
b209749f AK |
3228 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
3229 | struct kvm_tpr_access_ctl *tac) | |
3230 | { | |
3231 | if (tac->flags) | |
3232 | return -EINVAL; | |
3233 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
3234 | return 0; | |
3235 | } | |
3236 | ||
890ca9ae HY |
3237 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
3238 | u64 mcg_cap) | |
3239 | { | |
3240 | int r; | |
3241 | unsigned bank_num = mcg_cap & 0xff, bank; | |
3242 | ||
3243 | r = -EINVAL; | |
a9e38c3e | 3244 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae | 3245 | goto out; |
c45dcc71 | 3246 | if (mcg_cap & ~(kvm_mce_cap_supported | 0xff | 0xff0000)) |
890ca9ae HY |
3247 | goto out; |
3248 | r = 0; | |
3249 | vcpu->arch.mcg_cap = mcg_cap; | |
3250 | /* Init IA32_MCG_CTL to all 1s */ | |
3251 | if (mcg_cap & MCG_CTL_P) | |
3252 | vcpu->arch.mcg_ctl = ~(u64)0; | |
3253 | /* Init IA32_MCi_CTL to all 1s */ | |
3254 | for (bank = 0; bank < bank_num; bank++) | |
3255 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
c45dcc71 AR |
3256 | |
3257 | if (kvm_x86_ops->setup_mce) | |
3258 | kvm_x86_ops->setup_mce(vcpu); | |
890ca9ae HY |
3259 | out: |
3260 | return r; | |
3261 | } | |
3262 | ||
3263 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
3264 | struct kvm_x86_mce *mce) | |
3265 | { | |
3266 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
3267 | unsigned bank_num = mcg_cap & 0xff; | |
3268 | u64 *banks = vcpu->arch.mce_banks; | |
3269 | ||
3270 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
3271 | return -EINVAL; | |
3272 | /* | |
3273 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
3274 | * reporting is disabled | |
3275 | */ | |
3276 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
3277 | vcpu->arch.mcg_ctl != ~(u64)0) | |
3278 | return 0; | |
3279 | banks += 4 * mce->bank; | |
3280 | /* | |
3281 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
3282 | * reporting is disabled for the bank | |
3283 | */ | |
3284 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
3285 | return 0; | |
3286 | if (mce->status & MCI_STATUS_UC) { | |
3287 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 3288 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
a8eeb04a | 3289 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
890ca9ae HY |
3290 | return 0; |
3291 | } | |
3292 | if (banks[1] & MCI_STATUS_VAL) | |
3293 | mce->status |= MCI_STATUS_OVER; | |
3294 | banks[2] = mce->addr; | |
3295 | banks[3] = mce->misc; | |
3296 | vcpu->arch.mcg_status = mce->mcg_status; | |
3297 | banks[1] = mce->status; | |
3298 | kvm_queue_exception(vcpu, MC_VECTOR); | |
3299 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
3300 | || !(banks[1] & MCI_STATUS_UC)) { | |
3301 | if (banks[1] & MCI_STATUS_VAL) | |
3302 | mce->status |= MCI_STATUS_OVER; | |
3303 | banks[2] = mce->addr; | |
3304 | banks[3] = mce->misc; | |
3305 | banks[1] = mce->status; | |
3306 | } else | |
3307 | banks[1] |= MCI_STATUS_OVER; | |
3308 | return 0; | |
3309 | } | |
3310 | ||
3cfc3092 JK |
3311 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
3312 | struct kvm_vcpu_events *events) | |
3313 | { | |
7460fb4a | 3314 | process_nmi(vcpu); |
664f8e26 WL |
3315 | /* |
3316 | * FIXME: pass injected and pending separately. This is only | |
3317 | * needed for nested virtualization, whose state cannot be | |
3318 | * migrated yet. For now we can combine them. | |
3319 | */ | |
03b82a30 | 3320 | events->exception.injected = |
664f8e26 WL |
3321 | (vcpu->arch.exception.pending || |
3322 | vcpu->arch.exception.injected) && | |
03b82a30 | 3323 | !kvm_exception_is_soft(vcpu->arch.exception.nr); |
3cfc3092 JK |
3324 | events->exception.nr = vcpu->arch.exception.nr; |
3325 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
97e69aa6 | 3326 | events->exception.pad = 0; |
3cfc3092 JK |
3327 | events->exception.error_code = vcpu->arch.exception.error_code; |
3328 | ||
03b82a30 | 3329 | events->interrupt.injected = |
04140b41 | 3330 | vcpu->arch.interrupt.injected && !vcpu->arch.interrupt.soft; |
3cfc3092 | 3331 | events->interrupt.nr = vcpu->arch.interrupt.nr; |
03b82a30 | 3332 | events->interrupt.soft = 0; |
37ccdcbe | 3333 | events->interrupt.shadow = kvm_x86_ops->get_interrupt_shadow(vcpu); |
3cfc3092 JK |
3334 | |
3335 | events->nmi.injected = vcpu->arch.nmi_injected; | |
7460fb4a | 3336 | events->nmi.pending = vcpu->arch.nmi_pending != 0; |
3cfc3092 | 3337 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); |
97e69aa6 | 3338 | events->nmi.pad = 0; |
3cfc3092 | 3339 | |
66450a21 | 3340 | events->sipi_vector = 0; /* never valid when reporting to user space */ |
3cfc3092 | 3341 | |
f077825a PB |
3342 | events->smi.smm = is_smm(vcpu); |
3343 | events->smi.pending = vcpu->arch.smi_pending; | |
3344 | events->smi.smm_inside_nmi = | |
3345 | !!(vcpu->arch.hflags & HF_SMM_INSIDE_NMI_MASK); | |
3346 | events->smi.latched_init = kvm_lapic_latched_init(vcpu); | |
3347 | ||
dab4b911 | 3348 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
f077825a PB |
3349 | | KVM_VCPUEVENT_VALID_SHADOW |
3350 | | KVM_VCPUEVENT_VALID_SMM); | |
97e69aa6 | 3351 | memset(&events->reserved, 0, sizeof(events->reserved)); |
3cfc3092 JK |
3352 | } |
3353 | ||
6ef4e07e XG |
3354 | static void kvm_set_hflags(struct kvm_vcpu *vcpu, unsigned emul_flags); |
3355 | ||
3cfc3092 JK |
3356 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, |
3357 | struct kvm_vcpu_events *events) | |
3358 | { | |
dab4b911 | 3359 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 | 3360 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
f077825a PB |
3361 | | KVM_VCPUEVENT_VALID_SHADOW |
3362 | | KVM_VCPUEVENT_VALID_SMM)) | |
3cfc3092 JK |
3363 | return -EINVAL; |
3364 | ||
78e546c8 | 3365 | if (events->exception.injected && |
28d06353 JM |
3366 | (events->exception.nr > 31 || events->exception.nr == NMI_VECTOR || |
3367 | is_guest_mode(vcpu))) | |
78e546c8 PB |
3368 | return -EINVAL; |
3369 | ||
28bf2888 DH |
3370 | /* INITs are latched while in SMM */ |
3371 | if (events->flags & KVM_VCPUEVENT_VALID_SMM && | |
3372 | (events->smi.smm || events->smi.pending) && | |
3373 | vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) | |
3374 | return -EINVAL; | |
3375 | ||
7460fb4a | 3376 | process_nmi(vcpu); |
664f8e26 | 3377 | vcpu->arch.exception.injected = false; |
3cfc3092 JK |
3378 | vcpu->arch.exception.pending = events->exception.injected; |
3379 | vcpu->arch.exception.nr = events->exception.nr; | |
3380 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
3381 | vcpu->arch.exception.error_code = events->exception.error_code; | |
3382 | ||
04140b41 | 3383 | vcpu->arch.interrupt.injected = events->interrupt.injected; |
3cfc3092 JK |
3384 | vcpu->arch.interrupt.nr = events->interrupt.nr; |
3385 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
48005f64 JK |
3386 | if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) |
3387 | kvm_x86_ops->set_interrupt_shadow(vcpu, | |
3388 | events->interrupt.shadow); | |
3cfc3092 JK |
3389 | |
3390 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
3391 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
3392 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
3393 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
3394 | ||
66450a21 | 3395 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR && |
bce87cce | 3396 | lapic_in_kernel(vcpu)) |
66450a21 | 3397 | vcpu->arch.apic->sipi_vector = events->sipi_vector; |
3cfc3092 | 3398 | |
f077825a | 3399 | if (events->flags & KVM_VCPUEVENT_VALID_SMM) { |
6ef4e07e | 3400 | u32 hflags = vcpu->arch.hflags; |
f077825a | 3401 | if (events->smi.smm) |
6ef4e07e | 3402 | hflags |= HF_SMM_MASK; |
f077825a | 3403 | else |
6ef4e07e XG |
3404 | hflags &= ~HF_SMM_MASK; |
3405 | kvm_set_hflags(vcpu, hflags); | |
3406 | ||
f077825a | 3407 | vcpu->arch.smi_pending = events->smi.pending; |
f4ef1910 WL |
3408 | |
3409 | if (events->smi.smm) { | |
3410 | if (events->smi.smm_inside_nmi) | |
3411 | vcpu->arch.hflags |= HF_SMM_INSIDE_NMI_MASK; | |
f077825a | 3412 | else |
f4ef1910 WL |
3413 | vcpu->arch.hflags &= ~HF_SMM_INSIDE_NMI_MASK; |
3414 | if (lapic_in_kernel(vcpu)) { | |
3415 | if (events->smi.latched_init) | |
3416 | set_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); | |
3417 | else | |
3418 | clear_bit(KVM_APIC_INIT, &vcpu->arch.apic->pending_events); | |
3419 | } | |
f077825a PB |
3420 | } |
3421 | } | |
3422 | ||
3842d135 AK |
3423 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
3424 | ||
3cfc3092 JK |
3425 | return 0; |
3426 | } | |
3427 | ||
a1efbe77 JK |
3428 | static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, |
3429 | struct kvm_debugregs *dbgregs) | |
3430 | { | |
73aaf249 JK |
3431 | unsigned long val; |
3432 | ||
a1efbe77 | 3433 | memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db)); |
16f8a6f9 | 3434 | kvm_get_dr(vcpu, 6, &val); |
73aaf249 | 3435 | dbgregs->dr6 = val; |
a1efbe77 JK |
3436 | dbgregs->dr7 = vcpu->arch.dr7; |
3437 | dbgregs->flags = 0; | |
97e69aa6 | 3438 | memset(&dbgregs->reserved, 0, sizeof(dbgregs->reserved)); |
a1efbe77 JK |
3439 | } |
3440 | ||
3441 | static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, | |
3442 | struct kvm_debugregs *dbgregs) | |
3443 | { | |
3444 | if (dbgregs->flags) | |
3445 | return -EINVAL; | |
3446 | ||
d14bdb55 PB |
3447 | if (dbgregs->dr6 & ~0xffffffffull) |
3448 | return -EINVAL; | |
3449 | if (dbgregs->dr7 & ~0xffffffffull) | |
3450 | return -EINVAL; | |
3451 | ||
a1efbe77 | 3452 | memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db)); |
ae561ede | 3453 | kvm_update_dr0123(vcpu); |
a1efbe77 | 3454 | vcpu->arch.dr6 = dbgregs->dr6; |
73aaf249 | 3455 | kvm_update_dr6(vcpu); |
a1efbe77 | 3456 | vcpu->arch.dr7 = dbgregs->dr7; |
9926c9fd | 3457 | kvm_update_dr7(vcpu); |
a1efbe77 | 3458 | |
a1efbe77 JK |
3459 | return 0; |
3460 | } | |
3461 | ||
df1daba7 PB |
3462 | #define XSTATE_COMPACTION_ENABLED (1ULL << 63) |
3463 | ||
3464 | static void fill_xsave(u8 *dest, struct kvm_vcpu *vcpu) | |
3465 | { | |
c47ada30 | 3466 | struct xregs_state *xsave = &vcpu->arch.guest_fpu.state.xsave; |
400e4b20 | 3467 | u64 xstate_bv = xsave->header.xfeatures; |
df1daba7 PB |
3468 | u64 valid; |
3469 | ||
3470 | /* | |
3471 | * Copy legacy XSAVE area, to avoid complications with CPUID | |
3472 | * leaves 0 and 1 in the loop below. | |
3473 | */ | |
3474 | memcpy(dest, xsave, XSAVE_HDR_OFFSET); | |
3475 | ||
3476 | /* Set XSTATE_BV */ | |
00c87e9a | 3477 | xstate_bv &= vcpu->arch.guest_supported_xcr0 | XFEATURE_MASK_FPSSE; |
df1daba7 PB |
3478 | *(u64 *)(dest + XSAVE_HDR_OFFSET) = xstate_bv; |
3479 | ||
3480 | /* | |
3481 | * Copy each region from the possibly compacted offset to the | |
3482 | * non-compacted offset. | |
3483 | */ | |
d91cab78 | 3484 | valid = xstate_bv & ~XFEATURE_MASK_FPSSE; |
df1daba7 PB |
3485 | while (valid) { |
3486 | u64 feature = valid & -valid; | |
3487 | int index = fls64(feature) - 1; | |
3488 | void *src = get_xsave_addr(xsave, feature); | |
3489 | ||
3490 | if (src) { | |
3491 | u32 size, offset, ecx, edx; | |
3492 | cpuid_count(XSTATE_CPUID, index, | |
3493 | &size, &offset, &ecx, &edx); | |
38cfd5e3 PB |
3494 | if (feature == XFEATURE_MASK_PKRU) |
3495 | memcpy(dest + offset, &vcpu->arch.pkru, | |
3496 | sizeof(vcpu->arch.pkru)); | |
3497 | else | |
3498 | memcpy(dest + offset, src, size); | |
3499 | ||
df1daba7 PB |
3500 | } |
3501 | ||
3502 | valid -= feature; | |
3503 | } | |
3504 | } | |
3505 | ||
3506 | static void load_xsave(struct kvm_vcpu *vcpu, u8 *src) | |
3507 | { | |
c47ada30 | 3508 | struct xregs_state *xsave = &vcpu->arch.guest_fpu.state.xsave; |
df1daba7 PB |
3509 | u64 xstate_bv = *(u64 *)(src + XSAVE_HDR_OFFSET); |
3510 | u64 valid; | |
3511 | ||
3512 | /* | |
3513 | * Copy legacy XSAVE area, to avoid complications with CPUID | |
3514 | * leaves 0 and 1 in the loop below. | |
3515 | */ | |
3516 | memcpy(xsave, src, XSAVE_HDR_OFFSET); | |
3517 | ||
3518 | /* Set XSTATE_BV and possibly XCOMP_BV. */ | |
400e4b20 | 3519 | xsave->header.xfeatures = xstate_bv; |
782511b0 | 3520 | if (boot_cpu_has(X86_FEATURE_XSAVES)) |
3a54450b | 3521 | xsave->header.xcomp_bv = host_xcr0 | XSTATE_COMPACTION_ENABLED; |
df1daba7 PB |
3522 | |
3523 | /* | |
3524 | * Copy each region from the non-compacted offset to the | |
3525 | * possibly compacted offset. | |
3526 | */ | |
d91cab78 | 3527 | valid = xstate_bv & ~XFEATURE_MASK_FPSSE; |
df1daba7 PB |
3528 | while (valid) { |
3529 | u64 feature = valid & -valid; | |
3530 | int index = fls64(feature) - 1; | |
3531 | void *dest = get_xsave_addr(xsave, feature); | |
3532 | ||
3533 | if (dest) { | |
3534 | u32 size, offset, ecx, edx; | |
3535 | cpuid_count(XSTATE_CPUID, index, | |
3536 | &size, &offset, &ecx, &edx); | |
38cfd5e3 PB |
3537 | if (feature == XFEATURE_MASK_PKRU) |
3538 | memcpy(&vcpu->arch.pkru, src + offset, | |
3539 | sizeof(vcpu->arch.pkru)); | |
3540 | else | |
3541 | memcpy(dest, src + offset, size); | |
ee4100da | 3542 | } |
df1daba7 PB |
3543 | |
3544 | valid -= feature; | |
3545 | } | |
3546 | } | |
3547 | ||
2d5b5a66 SY |
3548 | static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu, |
3549 | struct kvm_xsave *guest_xsave) | |
3550 | { | |
d366bf7e | 3551 | if (boot_cpu_has(X86_FEATURE_XSAVE)) { |
df1daba7 PB |
3552 | memset(guest_xsave, 0, sizeof(struct kvm_xsave)); |
3553 | fill_xsave((u8 *) guest_xsave->region, vcpu); | |
4344ee98 | 3554 | } else { |
2d5b5a66 | 3555 | memcpy(guest_xsave->region, |
7366ed77 | 3556 | &vcpu->arch.guest_fpu.state.fxsave, |
c47ada30 | 3557 | sizeof(struct fxregs_state)); |
2d5b5a66 | 3558 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] = |
d91cab78 | 3559 | XFEATURE_MASK_FPSSE; |
2d5b5a66 SY |
3560 | } |
3561 | } | |
3562 | ||
a575813b WL |
3563 | #define XSAVE_MXCSR_OFFSET 24 |
3564 | ||
2d5b5a66 SY |
3565 | static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu, |
3566 | struct kvm_xsave *guest_xsave) | |
3567 | { | |
3568 | u64 xstate_bv = | |
3569 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)]; | |
a575813b | 3570 | u32 mxcsr = *(u32 *)&guest_xsave->region[XSAVE_MXCSR_OFFSET / sizeof(u32)]; |
2d5b5a66 | 3571 | |
d366bf7e | 3572 | if (boot_cpu_has(X86_FEATURE_XSAVE)) { |
d7876f1b PB |
3573 | /* |
3574 | * Here we allow setting states that are not present in | |
3575 | * CPUID leaf 0xD, index 0, EDX:EAX. This is for compatibility | |
3576 | * with old userspace. | |
3577 | */ | |
a575813b WL |
3578 | if (xstate_bv & ~kvm_supported_xcr0() || |
3579 | mxcsr & ~mxcsr_feature_mask) | |
d7876f1b | 3580 | return -EINVAL; |
df1daba7 | 3581 | load_xsave(vcpu, (u8 *)guest_xsave->region); |
d7876f1b | 3582 | } else { |
a575813b WL |
3583 | if (xstate_bv & ~XFEATURE_MASK_FPSSE || |
3584 | mxcsr & ~mxcsr_feature_mask) | |
2d5b5a66 | 3585 | return -EINVAL; |
7366ed77 | 3586 | memcpy(&vcpu->arch.guest_fpu.state.fxsave, |
c47ada30 | 3587 | guest_xsave->region, sizeof(struct fxregs_state)); |
2d5b5a66 SY |
3588 | } |
3589 | return 0; | |
3590 | } | |
3591 | ||
3592 | static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu, | |
3593 | struct kvm_xcrs *guest_xcrs) | |
3594 | { | |
d366bf7e | 3595 | if (!boot_cpu_has(X86_FEATURE_XSAVE)) { |
2d5b5a66 SY |
3596 | guest_xcrs->nr_xcrs = 0; |
3597 | return; | |
3598 | } | |
3599 | ||
3600 | guest_xcrs->nr_xcrs = 1; | |
3601 | guest_xcrs->flags = 0; | |
3602 | guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK; | |
3603 | guest_xcrs->xcrs[0].value = vcpu->arch.xcr0; | |
3604 | } | |
3605 | ||
3606 | static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu, | |
3607 | struct kvm_xcrs *guest_xcrs) | |
3608 | { | |
3609 | int i, r = 0; | |
3610 | ||
d366bf7e | 3611 | if (!boot_cpu_has(X86_FEATURE_XSAVE)) |
2d5b5a66 SY |
3612 | return -EINVAL; |
3613 | ||
3614 | if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags) | |
3615 | return -EINVAL; | |
3616 | ||
3617 | for (i = 0; i < guest_xcrs->nr_xcrs; i++) | |
3618 | /* Only support XCR0 currently */ | |
c67a04cb | 3619 | if (guest_xcrs->xcrs[i].xcr == XCR_XFEATURE_ENABLED_MASK) { |
2d5b5a66 | 3620 | r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK, |
c67a04cb | 3621 | guest_xcrs->xcrs[i].value); |
2d5b5a66 SY |
3622 | break; |
3623 | } | |
3624 | if (r) | |
3625 | r = -EINVAL; | |
3626 | return r; | |
3627 | } | |
3628 | ||
1c0b28c2 EM |
3629 | /* |
3630 | * kvm_set_guest_paused() indicates to the guest kernel that it has been | |
3631 | * stopped by the hypervisor. This function will be called from the host only. | |
3632 | * EINVAL is returned when the host attempts to set the flag for a guest that | |
3633 | * does not support pv clocks. | |
3634 | */ | |
3635 | static int kvm_set_guest_paused(struct kvm_vcpu *vcpu) | |
3636 | { | |
0b79459b | 3637 | if (!vcpu->arch.pv_time_enabled) |
1c0b28c2 | 3638 | return -EINVAL; |
51d59c6b | 3639 | vcpu->arch.pvclock_set_guest_stopped_request = true; |
1c0b28c2 EM |
3640 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
3641 | return 0; | |
3642 | } | |
3643 | ||
5c919412 AS |
3644 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
3645 | struct kvm_enable_cap *cap) | |
3646 | { | |
3647 | if (cap->flags) | |
3648 | return -EINVAL; | |
3649 | ||
3650 | switch (cap->cap) { | |
efc479e6 RK |
3651 | case KVM_CAP_HYPERV_SYNIC2: |
3652 | if (cap->args[0]) | |
3653 | return -EINVAL; | |
5c919412 | 3654 | case KVM_CAP_HYPERV_SYNIC: |
546d87e5 WL |
3655 | if (!irqchip_in_kernel(vcpu->kvm)) |
3656 | return -EINVAL; | |
efc479e6 RK |
3657 | return kvm_hv_activate_synic(vcpu, cap->cap == |
3658 | KVM_CAP_HYPERV_SYNIC2); | |
5c919412 AS |
3659 | default: |
3660 | return -EINVAL; | |
3661 | } | |
3662 | } | |
3663 | ||
313a3dc7 CO |
3664 | long kvm_arch_vcpu_ioctl(struct file *filp, |
3665 | unsigned int ioctl, unsigned long arg) | |
3666 | { | |
3667 | struct kvm_vcpu *vcpu = filp->private_data; | |
3668 | void __user *argp = (void __user *)arg; | |
3669 | int r; | |
d1ac91d8 AK |
3670 | union { |
3671 | struct kvm_lapic_state *lapic; | |
3672 | struct kvm_xsave *xsave; | |
3673 | struct kvm_xcrs *xcrs; | |
3674 | void *buffer; | |
3675 | } u; | |
3676 | ||
9b062471 CD |
3677 | vcpu_load(vcpu); |
3678 | ||
d1ac91d8 | 3679 | u.buffer = NULL; |
313a3dc7 CO |
3680 | switch (ioctl) { |
3681 | case KVM_GET_LAPIC: { | |
2204ae3c | 3682 | r = -EINVAL; |
bce87cce | 3683 | if (!lapic_in_kernel(vcpu)) |
2204ae3c | 3684 | goto out; |
d1ac91d8 | 3685 | u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 3686 | |
b772ff36 | 3687 | r = -ENOMEM; |
d1ac91d8 | 3688 | if (!u.lapic) |
b772ff36 | 3689 | goto out; |
d1ac91d8 | 3690 | r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3691 | if (r) |
3692 | goto out; | |
3693 | r = -EFAULT; | |
d1ac91d8 | 3694 | if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
3695 | goto out; |
3696 | r = 0; | |
3697 | break; | |
3698 | } | |
3699 | case KVM_SET_LAPIC: { | |
2204ae3c | 3700 | r = -EINVAL; |
bce87cce | 3701 | if (!lapic_in_kernel(vcpu)) |
2204ae3c | 3702 | goto out; |
ff5c2c03 | 3703 | u.lapic = memdup_user(argp, sizeof(*u.lapic)); |
9b062471 CD |
3704 | if (IS_ERR(u.lapic)) { |
3705 | r = PTR_ERR(u.lapic); | |
3706 | goto out_nofree; | |
3707 | } | |
ff5c2c03 | 3708 | |
d1ac91d8 | 3709 | r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3710 | break; |
3711 | } | |
f77bc6a4 ZX |
3712 | case KVM_INTERRUPT: { |
3713 | struct kvm_interrupt irq; | |
3714 | ||
3715 | r = -EFAULT; | |
3716 | if (copy_from_user(&irq, argp, sizeof irq)) | |
3717 | goto out; | |
3718 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
f77bc6a4 ZX |
3719 | break; |
3720 | } | |
c4abb7c9 JK |
3721 | case KVM_NMI: { |
3722 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
c4abb7c9 JK |
3723 | break; |
3724 | } | |
f077825a PB |
3725 | case KVM_SMI: { |
3726 | r = kvm_vcpu_ioctl_smi(vcpu); | |
3727 | break; | |
3728 | } | |
313a3dc7 CO |
3729 | case KVM_SET_CPUID: { |
3730 | struct kvm_cpuid __user *cpuid_arg = argp; | |
3731 | struct kvm_cpuid cpuid; | |
3732 | ||
3733 | r = -EFAULT; | |
3734 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3735 | goto out; | |
3736 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
313a3dc7 CO |
3737 | break; |
3738 | } | |
07716717 DK |
3739 | case KVM_SET_CPUID2: { |
3740 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3741 | struct kvm_cpuid2 cpuid; | |
3742 | ||
3743 | r = -EFAULT; | |
3744 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3745 | goto out; | |
3746 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 3747 | cpuid_arg->entries); |
07716717 DK |
3748 | break; |
3749 | } | |
3750 | case KVM_GET_CPUID2: { | |
3751 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3752 | struct kvm_cpuid2 cpuid; | |
3753 | ||
3754 | r = -EFAULT; | |
3755 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3756 | goto out; | |
3757 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 3758 | cpuid_arg->entries); |
07716717 DK |
3759 | if (r) |
3760 | goto out; | |
3761 | r = -EFAULT; | |
3762 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
3763 | goto out; | |
3764 | r = 0; | |
3765 | break; | |
3766 | } | |
801e459a TL |
3767 | case KVM_GET_MSRS: { |
3768 | int idx = srcu_read_lock(&vcpu->kvm->srcu); | |
609e36d3 | 3769 | r = msr_io(vcpu, argp, do_get_msr, 1); |
801e459a | 3770 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 3771 | break; |
801e459a TL |
3772 | } |
3773 | case KVM_SET_MSRS: { | |
3774 | int idx = srcu_read_lock(&vcpu->kvm->srcu); | |
313a3dc7 | 3775 | r = msr_io(vcpu, argp, do_set_msr, 0); |
801e459a | 3776 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 3777 | break; |
801e459a | 3778 | } |
b209749f AK |
3779 | case KVM_TPR_ACCESS_REPORTING: { |
3780 | struct kvm_tpr_access_ctl tac; | |
3781 | ||
3782 | r = -EFAULT; | |
3783 | if (copy_from_user(&tac, argp, sizeof tac)) | |
3784 | goto out; | |
3785 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
3786 | if (r) | |
3787 | goto out; | |
3788 | r = -EFAULT; | |
3789 | if (copy_to_user(argp, &tac, sizeof tac)) | |
3790 | goto out; | |
3791 | r = 0; | |
3792 | break; | |
3793 | }; | |
b93463aa AK |
3794 | case KVM_SET_VAPIC_ADDR: { |
3795 | struct kvm_vapic_addr va; | |
7301d6ab | 3796 | int idx; |
b93463aa AK |
3797 | |
3798 | r = -EINVAL; | |
35754c98 | 3799 | if (!lapic_in_kernel(vcpu)) |
b93463aa AK |
3800 | goto out; |
3801 | r = -EFAULT; | |
3802 | if (copy_from_user(&va, argp, sizeof va)) | |
3803 | goto out; | |
7301d6ab | 3804 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
fda4e2e8 | 3805 | r = kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); |
7301d6ab | 3806 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b93463aa AK |
3807 | break; |
3808 | } | |
890ca9ae HY |
3809 | case KVM_X86_SETUP_MCE: { |
3810 | u64 mcg_cap; | |
3811 | ||
3812 | r = -EFAULT; | |
3813 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
3814 | goto out; | |
3815 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
3816 | break; | |
3817 | } | |
3818 | case KVM_X86_SET_MCE: { | |
3819 | struct kvm_x86_mce mce; | |
3820 | ||
3821 | r = -EFAULT; | |
3822 | if (copy_from_user(&mce, argp, sizeof mce)) | |
3823 | goto out; | |
3824 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
3825 | break; | |
3826 | } | |
3cfc3092 JK |
3827 | case KVM_GET_VCPU_EVENTS: { |
3828 | struct kvm_vcpu_events events; | |
3829 | ||
3830 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
3831 | ||
3832 | r = -EFAULT; | |
3833 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
3834 | break; | |
3835 | r = 0; | |
3836 | break; | |
3837 | } | |
3838 | case KVM_SET_VCPU_EVENTS: { | |
3839 | struct kvm_vcpu_events events; | |
3840 | ||
3841 | r = -EFAULT; | |
3842 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
3843 | break; | |
3844 | ||
3845 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
3846 | break; | |
3847 | } | |
a1efbe77 JK |
3848 | case KVM_GET_DEBUGREGS: { |
3849 | struct kvm_debugregs dbgregs; | |
3850 | ||
3851 | kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs); | |
3852 | ||
3853 | r = -EFAULT; | |
3854 | if (copy_to_user(argp, &dbgregs, | |
3855 | sizeof(struct kvm_debugregs))) | |
3856 | break; | |
3857 | r = 0; | |
3858 | break; | |
3859 | } | |
3860 | case KVM_SET_DEBUGREGS: { | |
3861 | struct kvm_debugregs dbgregs; | |
3862 | ||
3863 | r = -EFAULT; | |
3864 | if (copy_from_user(&dbgregs, argp, | |
3865 | sizeof(struct kvm_debugregs))) | |
3866 | break; | |
3867 | ||
3868 | r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs); | |
3869 | break; | |
3870 | } | |
2d5b5a66 | 3871 | case KVM_GET_XSAVE: { |
d1ac91d8 | 3872 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 3873 | r = -ENOMEM; |
d1ac91d8 | 3874 | if (!u.xsave) |
2d5b5a66 SY |
3875 | break; |
3876 | ||
d1ac91d8 | 3877 | kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3878 | |
3879 | r = -EFAULT; | |
d1ac91d8 | 3880 | if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
3881 | break; |
3882 | r = 0; | |
3883 | break; | |
3884 | } | |
3885 | case KVM_SET_XSAVE: { | |
ff5c2c03 | 3886 | u.xsave = memdup_user(argp, sizeof(*u.xsave)); |
9b062471 CD |
3887 | if (IS_ERR(u.xsave)) { |
3888 | r = PTR_ERR(u.xsave); | |
3889 | goto out_nofree; | |
3890 | } | |
2d5b5a66 | 3891 | |
d1ac91d8 | 3892 | r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3893 | break; |
3894 | } | |
3895 | case KVM_GET_XCRS: { | |
d1ac91d8 | 3896 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 3897 | r = -ENOMEM; |
d1ac91d8 | 3898 | if (!u.xcrs) |
2d5b5a66 SY |
3899 | break; |
3900 | ||
d1ac91d8 | 3901 | kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3902 | |
3903 | r = -EFAULT; | |
d1ac91d8 | 3904 | if (copy_to_user(argp, u.xcrs, |
2d5b5a66 SY |
3905 | sizeof(struct kvm_xcrs))) |
3906 | break; | |
3907 | r = 0; | |
3908 | break; | |
3909 | } | |
3910 | case KVM_SET_XCRS: { | |
ff5c2c03 | 3911 | u.xcrs = memdup_user(argp, sizeof(*u.xcrs)); |
9b062471 CD |
3912 | if (IS_ERR(u.xcrs)) { |
3913 | r = PTR_ERR(u.xcrs); | |
3914 | goto out_nofree; | |
3915 | } | |
2d5b5a66 | 3916 | |
d1ac91d8 | 3917 | r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3918 | break; |
3919 | } | |
92a1f12d JR |
3920 | case KVM_SET_TSC_KHZ: { |
3921 | u32 user_tsc_khz; | |
3922 | ||
3923 | r = -EINVAL; | |
92a1f12d JR |
3924 | user_tsc_khz = (u32)arg; |
3925 | ||
3926 | if (user_tsc_khz >= kvm_max_guest_tsc_khz) | |
3927 | goto out; | |
3928 | ||
cc578287 ZA |
3929 | if (user_tsc_khz == 0) |
3930 | user_tsc_khz = tsc_khz; | |
3931 | ||
381d585c HZ |
3932 | if (!kvm_set_tsc_khz(vcpu, user_tsc_khz)) |
3933 | r = 0; | |
92a1f12d | 3934 | |
92a1f12d JR |
3935 | goto out; |
3936 | } | |
3937 | case KVM_GET_TSC_KHZ: { | |
cc578287 | 3938 | r = vcpu->arch.virtual_tsc_khz; |
92a1f12d JR |
3939 | goto out; |
3940 | } | |
1c0b28c2 EM |
3941 | case KVM_KVMCLOCK_CTRL: { |
3942 | r = kvm_set_guest_paused(vcpu); | |
3943 | goto out; | |
3944 | } | |
5c919412 AS |
3945 | case KVM_ENABLE_CAP: { |
3946 | struct kvm_enable_cap cap; | |
3947 | ||
3948 | r = -EFAULT; | |
3949 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
3950 | goto out; | |
3951 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
3952 | break; | |
3953 | } | |
313a3dc7 CO |
3954 | default: |
3955 | r = -EINVAL; | |
3956 | } | |
3957 | out: | |
d1ac91d8 | 3958 | kfree(u.buffer); |
9b062471 CD |
3959 | out_nofree: |
3960 | vcpu_put(vcpu); | |
313a3dc7 CO |
3961 | return r; |
3962 | } | |
3963 | ||
5b1c1493 CO |
3964 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
3965 | { | |
3966 | return VM_FAULT_SIGBUS; | |
3967 | } | |
3968 | ||
1fe779f8 CO |
3969 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
3970 | { | |
3971 | int ret; | |
3972 | ||
3973 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
951179ce | 3974 | return -EINVAL; |
1fe779f8 CO |
3975 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); |
3976 | return ret; | |
3977 | } | |
3978 | ||
b927a3ce SY |
3979 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
3980 | u64 ident_addr) | |
3981 | { | |
2ac52ab8 | 3982 | return kvm_x86_ops->set_identity_map_addr(kvm, ident_addr); |
b927a3ce SY |
3983 | } |
3984 | ||
1fe779f8 CO |
3985 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
3986 | u32 kvm_nr_mmu_pages) | |
3987 | { | |
3988 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
3989 | return -EINVAL; | |
3990 | ||
79fac95e | 3991 | mutex_lock(&kvm->slots_lock); |
1fe779f8 CO |
3992 | |
3993 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 3994 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 3995 | |
79fac95e | 3996 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
3997 | return 0; |
3998 | } | |
3999 | ||
4000 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
4001 | { | |
39de71ec | 4002 | return kvm->arch.n_max_mmu_pages; |
1fe779f8 CO |
4003 | } |
4004 | ||
1fe779f8 CO |
4005 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
4006 | { | |
90bca052 | 4007 | struct kvm_pic *pic = kvm->arch.vpic; |
1fe779f8 CO |
4008 | int r; |
4009 | ||
4010 | r = 0; | |
4011 | switch (chip->chip_id) { | |
4012 | case KVM_IRQCHIP_PIC_MASTER: | |
90bca052 | 4013 | memcpy(&chip->chip.pic, &pic->pics[0], |
1fe779f8 CO |
4014 | sizeof(struct kvm_pic_state)); |
4015 | break; | |
4016 | case KVM_IRQCHIP_PIC_SLAVE: | |
90bca052 | 4017 | memcpy(&chip->chip.pic, &pic->pics[1], |
1fe779f8 CO |
4018 | sizeof(struct kvm_pic_state)); |
4019 | break; | |
4020 | case KVM_IRQCHIP_IOAPIC: | |
33392b49 | 4021 | kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
4022 | break; |
4023 | default: | |
4024 | r = -EINVAL; | |
4025 | break; | |
4026 | } | |
4027 | return r; | |
4028 | } | |
4029 | ||
4030 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
4031 | { | |
90bca052 | 4032 | struct kvm_pic *pic = kvm->arch.vpic; |
1fe779f8 CO |
4033 | int r; |
4034 | ||
4035 | r = 0; | |
4036 | switch (chip->chip_id) { | |
4037 | case KVM_IRQCHIP_PIC_MASTER: | |
90bca052 DH |
4038 | spin_lock(&pic->lock); |
4039 | memcpy(&pic->pics[0], &chip->chip.pic, | |
1fe779f8 | 4040 | sizeof(struct kvm_pic_state)); |
90bca052 | 4041 | spin_unlock(&pic->lock); |
1fe779f8 CO |
4042 | break; |
4043 | case KVM_IRQCHIP_PIC_SLAVE: | |
90bca052 DH |
4044 | spin_lock(&pic->lock); |
4045 | memcpy(&pic->pics[1], &chip->chip.pic, | |
1fe779f8 | 4046 | sizeof(struct kvm_pic_state)); |
90bca052 | 4047 | spin_unlock(&pic->lock); |
1fe779f8 CO |
4048 | break; |
4049 | case KVM_IRQCHIP_IOAPIC: | |
33392b49 | 4050 | kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
4051 | break; |
4052 | default: | |
4053 | r = -EINVAL; | |
4054 | break; | |
4055 | } | |
90bca052 | 4056 | kvm_pic_update_irq(pic); |
1fe779f8 CO |
4057 | return r; |
4058 | } | |
4059 | ||
e0f63cb9 SY |
4060 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
4061 | { | |
34f3941c RK |
4062 | struct kvm_kpit_state *kps = &kvm->arch.vpit->pit_state; |
4063 | ||
4064 | BUILD_BUG_ON(sizeof(*ps) != sizeof(kps->channels)); | |
4065 | ||
4066 | mutex_lock(&kps->lock); | |
4067 | memcpy(ps, &kps->channels, sizeof(*ps)); | |
4068 | mutex_unlock(&kps->lock); | |
2da29bcc | 4069 | return 0; |
e0f63cb9 SY |
4070 | } |
4071 | ||
4072 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
4073 | { | |
0185604c | 4074 | int i; |
09edea72 RK |
4075 | struct kvm_pit *pit = kvm->arch.vpit; |
4076 | ||
4077 | mutex_lock(&pit->pit_state.lock); | |
34f3941c | 4078 | memcpy(&pit->pit_state.channels, ps, sizeof(*ps)); |
0185604c | 4079 | for (i = 0; i < 3; i++) |
09edea72 RK |
4080 | kvm_pit_load_count(pit, i, ps->channels[i].count, 0); |
4081 | mutex_unlock(&pit->pit_state.lock); | |
2da29bcc | 4082 | return 0; |
e9f42757 BK |
4083 | } |
4084 | ||
4085 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
4086 | { | |
e9f42757 BK |
4087 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
4088 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
4089 | sizeof(ps->channels)); | |
4090 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
4091 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
97e69aa6 | 4092 | memset(&ps->reserved, 0, sizeof(ps->reserved)); |
2da29bcc | 4093 | return 0; |
e9f42757 BK |
4094 | } |
4095 | ||
4096 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
4097 | { | |
2da29bcc | 4098 | int start = 0; |
0185604c | 4099 | int i; |
e9f42757 | 4100 | u32 prev_legacy, cur_legacy; |
09edea72 RK |
4101 | struct kvm_pit *pit = kvm->arch.vpit; |
4102 | ||
4103 | mutex_lock(&pit->pit_state.lock); | |
4104 | prev_legacy = pit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
e9f42757 BK |
4105 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; |
4106 | if (!prev_legacy && cur_legacy) | |
4107 | start = 1; | |
09edea72 RK |
4108 | memcpy(&pit->pit_state.channels, &ps->channels, |
4109 | sizeof(pit->pit_state.channels)); | |
4110 | pit->pit_state.flags = ps->flags; | |
0185604c | 4111 | for (i = 0; i < 3; i++) |
09edea72 | 4112 | kvm_pit_load_count(pit, i, pit->pit_state.channels[i].count, |
e5e57e7a | 4113 | start && i == 0); |
09edea72 | 4114 | mutex_unlock(&pit->pit_state.lock); |
2da29bcc | 4115 | return 0; |
e0f63cb9 SY |
4116 | } |
4117 | ||
52d939a0 MT |
4118 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
4119 | struct kvm_reinject_control *control) | |
4120 | { | |
71474e2f RK |
4121 | struct kvm_pit *pit = kvm->arch.vpit; |
4122 | ||
4123 | if (!pit) | |
52d939a0 | 4124 | return -ENXIO; |
b39c90b6 | 4125 | |
71474e2f RK |
4126 | /* pit->pit_state.lock was overloaded to prevent userspace from getting |
4127 | * an inconsistent state after running multiple KVM_REINJECT_CONTROL | |
4128 | * ioctls in parallel. Use a separate lock if that ioctl isn't rare. | |
4129 | */ | |
4130 | mutex_lock(&pit->pit_state.lock); | |
4131 | kvm_pit_set_reinject(pit, control->pit_reinject); | |
4132 | mutex_unlock(&pit->pit_state.lock); | |
b39c90b6 | 4133 | |
52d939a0 MT |
4134 | return 0; |
4135 | } | |
4136 | ||
95d4c16c | 4137 | /** |
60c34612 TY |
4138 | * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot |
4139 | * @kvm: kvm instance | |
4140 | * @log: slot id and address to which we copy the log | |
95d4c16c | 4141 | * |
e108ff2f PB |
4142 | * Steps 1-4 below provide general overview of dirty page logging. See |
4143 | * kvm_get_dirty_log_protect() function description for additional details. | |
4144 | * | |
4145 | * We call kvm_get_dirty_log_protect() to handle steps 1-3, upon return we | |
4146 | * always flush the TLB (step 4) even if previous step failed and the dirty | |
4147 | * bitmap may be corrupt. Regardless of previous outcome the KVM logging API | |
4148 | * does not preclude user space subsequent dirty log read. Flushing TLB ensures | |
4149 | * writes will be marked dirty for next log read. | |
95d4c16c | 4150 | * |
60c34612 TY |
4151 | * 1. Take a snapshot of the bit and clear it if needed. |
4152 | * 2. Write protect the corresponding page. | |
e108ff2f PB |
4153 | * 3. Copy the snapshot to the userspace. |
4154 | * 4. Flush TLB's if needed. | |
5bb064dc | 4155 | */ |
60c34612 | 4156 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
5bb064dc | 4157 | { |
60c34612 | 4158 | bool is_dirty = false; |
e108ff2f | 4159 | int r; |
5bb064dc | 4160 | |
79fac95e | 4161 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 4162 | |
88178fd4 KH |
4163 | /* |
4164 | * Flush potentially hardware-cached dirty pages to dirty_bitmap. | |
4165 | */ | |
4166 | if (kvm_x86_ops->flush_log_dirty) | |
4167 | kvm_x86_ops->flush_log_dirty(kvm); | |
4168 | ||
e108ff2f | 4169 | r = kvm_get_dirty_log_protect(kvm, log, &is_dirty); |
198c74f4 XG |
4170 | |
4171 | /* | |
4172 | * All the TLBs can be flushed out of mmu lock, see the comments in | |
4173 | * kvm_mmu_slot_remove_write_access(). | |
4174 | */ | |
e108ff2f | 4175 | lockdep_assert_held(&kvm->slots_lock); |
198c74f4 XG |
4176 | if (is_dirty) |
4177 | kvm_flush_remote_tlbs(kvm); | |
4178 | ||
79fac95e | 4179 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
4180 | return r; |
4181 | } | |
4182 | ||
aa2fbe6d YZ |
4183 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, |
4184 | bool line_status) | |
23d43cf9 CD |
4185 | { |
4186 | if (!irqchip_in_kernel(kvm)) | |
4187 | return -ENXIO; | |
4188 | ||
4189 | irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, | |
aa2fbe6d YZ |
4190 | irq_event->irq, irq_event->level, |
4191 | line_status); | |
23d43cf9 CD |
4192 | return 0; |
4193 | } | |
4194 | ||
90de4a18 NA |
4195 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, |
4196 | struct kvm_enable_cap *cap) | |
4197 | { | |
4198 | int r; | |
4199 | ||
4200 | if (cap->flags) | |
4201 | return -EINVAL; | |
4202 | ||
4203 | switch (cap->cap) { | |
4204 | case KVM_CAP_DISABLE_QUIRKS: | |
4205 | kvm->arch.disabled_quirks = cap->args[0]; | |
4206 | r = 0; | |
4207 | break; | |
49df6397 SR |
4208 | case KVM_CAP_SPLIT_IRQCHIP: { |
4209 | mutex_lock(&kvm->lock); | |
b053b2ae SR |
4210 | r = -EINVAL; |
4211 | if (cap->args[0] > MAX_NR_RESERVED_IOAPIC_PINS) | |
4212 | goto split_irqchip_unlock; | |
49df6397 SR |
4213 | r = -EEXIST; |
4214 | if (irqchip_in_kernel(kvm)) | |
4215 | goto split_irqchip_unlock; | |
557abc40 | 4216 | if (kvm->created_vcpus) |
49df6397 SR |
4217 | goto split_irqchip_unlock; |
4218 | r = kvm_setup_empty_irq_routing(kvm); | |
5c0aea0e | 4219 | if (r) |
49df6397 SR |
4220 | goto split_irqchip_unlock; |
4221 | /* Pairs with irqchip_in_kernel. */ | |
4222 | smp_wmb(); | |
49776faf | 4223 | kvm->arch.irqchip_mode = KVM_IRQCHIP_SPLIT; |
b053b2ae | 4224 | kvm->arch.nr_reserved_ioapic_pins = cap->args[0]; |
49df6397 SR |
4225 | r = 0; |
4226 | split_irqchip_unlock: | |
4227 | mutex_unlock(&kvm->lock); | |
4228 | break; | |
4229 | } | |
37131313 RK |
4230 | case KVM_CAP_X2APIC_API: |
4231 | r = -EINVAL; | |
4232 | if (cap->args[0] & ~KVM_X2APIC_API_VALID_FLAGS) | |
4233 | break; | |
4234 | ||
4235 | if (cap->args[0] & KVM_X2APIC_API_USE_32BIT_IDS) | |
4236 | kvm->arch.x2apic_format = true; | |
c519265f RK |
4237 | if (cap->args[0] & KVM_X2APIC_API_DISABLE_BROADCAST_QUIRK) |
4238 | kvm->arch.x2apic_broadcast_quirk_disabled = true; | |
37131313 RK |
4239 | |
4240 | r = 0; | |
4241 | break; | |
4d5422ce WL |
4242 | case KVM_CAP_X86_DISABLE_EXITS: |
4243 | r = -EINVAL; | |
4244 | if (cap->args[0] & ~KVM_X86_DISABLE_VALID_EXITS) | |
4245 | break; | |
4246 | ||
4247 | if ((cap->args[0] & KVM_X86_DISABLE_EXITS_MWAIT) && | |
4248 | kvm_can_mwait_in_guest()) | |
4249 | kvm->arch.mwait_in_guest = true; | |
caa057a2 WL |
4250 | if (cap->args[0] & KVM_X86_DISABLE_EXITS_HTL) |
4251 | kvm->arch.hlt_in_guest = true; | |
b31c114b WL |
4252 | if (cap->args[0] & KVM_X86_DISABLE_EXITS_PAUSE) |
4253 | kvm->arch.pause_in_guest = true; | |
4d5422ce WL |
4254 | r = 0; |
4255 | break; | |
90de4a18 NA |
4256 | default: |
4257 | r = -EINVAL; | |
4258 | break; | |
4259 | } | |
4260 | return r; | |
4261 | } | |
4262 | ||
1fe779f8 CO |
4263 | long kvm_arch_vm_ioctl(struct file *filp, |
4264 | unsigned int ioctl, unsigned long arg) | |
4265 | { | |
4266 | struct kvm *kvm = filp->private_data; | |
4267 | void __user *argp = (void __user *)arg; | |
367e1319 | 4268 | int r = -ENOTTY; |
f0d66275 DH |
4269 | /* |
4270 | * This union makes it completely explicit to gcc-3.x | |
4271 | * that these two variables' stack usage should be | |
4272 | * combined, not added together. | |
4273 | */ | |
4274 | union { | |
4275 | struct kvm_pit_state ps; | |
e9f42757 | 4276 | struct kvm_pit_state2 ps2; |
c5ff41ce | 4277 | struct kvm_pit_config pit_config; |
f0d66275 | 4278 | } u; |
1fe779f8 CO |
4279 | |
4280 | switch (ioctl) { | |
4281 | case KVM_SET_TSS_ADDR: | |
4282 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
1fe779f8 | 4283 | break; |
b927a3ce SY |
4284 | case KVM_SET_IDENTITY_MAP_ADDR: { |
4285 | u64 ident_addr; | |
4286 | ||
1af1ac91 DH |
4287 | mutex_lock(&kvm->lock); |
4288 | r = -EINVAL; | |
4289 | if (kvm->created_vcpus) | |
4290 | goto set_identity_unlock; | |
b927a3ce SY |
4291 | r = -EFAULT; |
4292 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
1af1ac91 | 4293 | goto set_identity_unlock; |
b927a3ce | 4294 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); |
1af1ac91 DH |
4295 | set_identity_unlock: |
4296 | mutex_unlock(&kvm->lock); | |
b927a3ce SY |
4297 | break; |
4298 | } | |
1fe779f8 CO |
4299 | case KVM_SET_NR_MMU_PAGES: |
4300 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
1fe779f8 CO |
4301 | break; |
4302 | case KVM_GET_NR_MMU_PAGES: | |
4303 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
4304 | break; | |
3ddea128 | 4305 | case KVM_CREATE_IRQCHIP: { |
3ddea128 | 4306 | mutex_lock(&kvm->lock); |
09941366 | 4307 | |
3ddea128 | 4308 | r = -EEXIST; |
35e6eaa3 | 4309 | if (irqchip_in_kernel(kvm)) |
3ddea128 | 4310 | goto create_irqchip_unlock; |
09941366 | 4311 | |
3e515705 | 4312 | r = -EINVAL; |
557abc40 | 4313 | if (kvm->created_vcpus) |
3e515705 | 4314 | goto create_irqchip_unlock; |
09941366 RK |
4315 | |
4316 | r = kvm_pic_init(kvm); | |
4317 | if (r) | |
3ddea128 | 4318 | goto create_irqchip_unlock; |
09941366 RK |
4319 | |
4320 | r = kvm_ioapic_init(kvm); | |
4321 | if (r) { | |
09941366 | 4322 | kvm_pic_destroy(kvm); |
3ddea128 | 4323 | goto create_irqchip_unlock; |
09941366 RK |
4324 | } |
4325 | ||
399ec807 AK |
4326 | r = kvm_setup_default_irq_routing(kvm); |
4327 | if (r) { | |
72bb2fcd | 4328 | kvm_ioapic_destroy(kvm); |
09941366 | 4329 | kvm_pic_destroy(kvm); |
71ba994c | 4330 | goto create_irqchip_unlock; |
399ec807 | 4331 | } |
49776faf | 4332 | /* Write kvm->irq_routing before enabling irqchip_in_kernel. */ |
71ba994c | 4333 | smp_wmb(); |
49776faf | 4334 | kvm->arch.irqchip_mode = KVM_IRQCHIP_KERNEL; |
3ddea128 MT |
4335 | create_irqchip_unlock: |
4336 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 4337 | break; |
3ddea128 | 4338 | } |
7837699f | 4339 | case KVM_CREATE_PIT: |
c5ff41ce JK |
4340 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
4341 | goto create_pit; | |
4342 | case KVM_CREATE_PIT2: | |
4343 | r = -EFAULT; | |
4344 | if (copy_from_user(&u.pit_config, argp, | |
4345 | sizeof(struct kvm_pit_config))) | |
4346 | goto out; | |
4347 | create_pit: | |
250715a6 | 4348 | mutex_lock(&kvm->lock); |
269e05e4 AK |
4349 | r = -EEXIST; |
4350 | if (kvm->arch.vpit) | |
4351 | goto create_pit_unlock; | |
7837699f | 4352 | r = -ENOMEM; |
c5ff41ce | 4353 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
4354 | if (kvm->arch.vpit) |
4355 | r = 0; | |
269e05e4 | 4356 | create_pit_unlock: |
250715a6 | 4357 | mutex_unlock(&kvm->lock); |
7837699f | 4358 | break; |
1fe779f8 CO |
4359 | case KVM_GET_IRQCHIP: { |
4360 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 4361 | struct kvm_irqchip *chip; |
1fe779f8 | 4362 | |
ff5c2c03 SL |
4363 | chip = memdup_user(argp, sizeof(*chip)); |
4364 | if (IS_ERR(chip)) { | |
4365 | r = PTR_ERR(chip); | |
1fe779f8 | 4366 | goto out; |
ff5c2c03 SL |
4367 | } |
4368 | ||
1fe779f8 | 4369 | r = -ENXIO; |
826da321 | 4370 | if (!irqchip_kernel(kvm)) |
f0d66275 DH |
4371 | goto get_irqchip_out; |
4372 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 4373 | if (r) |
f0d66275 | 4374 | goto get_irqchip_out; |
1fe779f8 | 4375 | r = -EFAULT; |
f0d66275 DH |
4376 | if (copy_to_user(argp, chip, sizeof *chip)) |
4377 | goto get_irqchip_out; | |
1fe779f8 | 4378 | r = 0; |
f0d66275 DH |
4379 | get_irqchip_out: |
4380 | kfree(chip); | |
1fe779f8 CO |
4381 | break; |
4382 | } | |
4383 | case KVM_SET_IRQCHIP: { | |
4384 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
ff5c2c03 | 4385 | struct kvm_irqchip *chip; |
1fe779f8 | 4386 | |
ff5c2c03 SL |
4387 | chip = memdup_user(argp, sizeof(*chip)); |
4388 | if (IS_ERR(chip)) { | |
4389 | r = PTR_ERR(chip); | |
1fe779f8 | 4390 | goto out; |
ff5c2c03 SL |
4391 | } |
4392 | ||
1fe779f8 | 4393 | r = -ENXIO; |
826da321 | 4394 | if (!irqchip_kernel(kvm)) |
f0d66275 DH |
4395 | goto set_irqchip_out; |
4396 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 4397 | if (r) |
f0d66275 | 4398 | goto set_irqchip_out; |
1fe779f8 | 4399 | r = 0; |
f0d66275 DH |
4400 | set_irqchip_out: |
4401 | kfree(chip); | |
1fe779f8 CO |
4402 | break; |
4403 | } | |
e0f63cb9 | 4404 | case KVM_GET_PIT: { |
e0f63cb9 | 4405 | r = -EFAULT; |
f0d66275 | 4406 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
4407 | goto out; |
4408 | r = -ENXIO; | |
4409 | if (!kvm->arch.vpit) | |
4410 | goto out; | |
f0d66275 | 4411 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
4412 | if (r) |
4413 | goto out; | |
4414 | r = -EFAULT; | |
f0d66275 | 4415 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
4416 | goto out; |
4417 | r = 0; | |
4418 | break; | |
4419 | } | |
4420 | case KVM_SET_PIT: { | |
e0f63cb9 | 4421 | r = -EFAULT; |
f0d66275 | 4422 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
4423 | goto out; |
4424 | r = -ENXIO; | |
4425 | if (!kvm->arch.vpit) | |
4426 | goto out; | |
f0d66275 | 4427 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
4428 | break; |
4429 | } | |
e9f42757 BK |
4430 | case KVM_GET_PIT2: { |
4431 | r = -ENXIO; | |
4432 | if (!kvm->arch.vpit) | |
4433 | goto out; | |
4434 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
4435 | if (r) | |
4436 | goto out; | |
4437 | r = -EFAULT; | |
4438 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
4439 | goto out; | |
4440 | r = 0; | |
4441 | break; | |
4442 | } | |
4443 | case KVM_SET_PIT2: { | |
4444 | r = -EFAULT; | |
4445 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
4446 | goto out; | |
4447 | r = -ENXIO; | |
4448 | if (!kvm->arch.vpit) | |
4449 | goto out; | |
4450 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
e9f42757 BK |
4451 | break; |
4452 | } | |
52d939a0 MT |
4453 | case KVM_REINJECT_CONTROL: { |
4454 | struct kvm_reinject_control control; | |
4455 | r = -EFAULT; | |
4456 | if (copy_from_user(&control, argp, sizeof(control))) | |
4457 | goto out; | |
4458 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
52d939a0 MT |
4459 | break; |
4460 | } | |
d71ba788 PB |
4461 | case KVM_SET_BOOT_CPU_ID: |
4462 | r = 0; | |
4463 | mutex_lock(&kvm->lock); | |
557abc40 | 4464 | if (kvm->created_vcpus) |
d71ba788 PB |
4465 | r = -EBUSY; |
4466 | else | |
4467 | kvm->arch.bsp_vcpu_id = arg; | |
4468 | mutex_unlock(&kvm->lock); | |
4469 | break; | |
ffde22ac | 4470 | case KVM_XEN_HVM_CONFIG: { |
51776043 | 4471 | struct kvm_xen_hvm_config xhc; |
ffde22ac | 4472 | r = -EFAULT; |
51776043 | 4473 | if (copy_from_user(&xhc, argp, sizeof(xhc))) |
ffde22ac ES |
4474 | goto out; |
4475 | r = -EINVAL; | |
51776043 | 4476 | if (xhc.flags) |
ffde22ac | 4477 | goto out; |
51776043 | 4478 | memcpy(&kvm->arch.xen_hvm_config, &xhc, sizeof(xhc)); |
ffde22ac ES |
4479 | r = 0; |
4480 | break; | |
4481 | } | |
afbcf7ab | 4482 | case KVM_SET_CLOCK: { |
afbcf7ab GC |
4483 | struct kvm_clock_data user_ns; |
4484 | u64 now_ns; | |
afbcf7ab GC |
4485 | |
4486 | r = -EFAULT; | |
4487 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
4488 | goto out; | |
4489 | ||
4490 | r = -EINVAL; | |
4491 | if (user_ns.flags) | |
4492 | goto out; | |
4493 | ||
4494 | r = 0; | |
0bc48bea RK |
4495 | /* |
4496 | * TODO: userspace has to take care of races with VCPU_RUN, so | |
4497 | * kvm_gen_update_masterclock() can be cut down to locked | |
4498 | * pvclock_update_vm_gtod_copy(). | |
4499 | */ | |
4500 | kvm_gen_update_masterclock(kvm); | |
e891a32e | 4501 | now_ns = get_kvmclock_ns(kvm); |
108b249c | 4502 | kvm->arch.kvmclock_offset += user_ns.clock - now_ns; |
0bc48bea | 4503 | kvm_make_all_cpus_request(kvm, KVM_REQ_CLOCK_UPDATE); |
afbcf7ab GC |
4504 | break; |
4505 | } | |
4506 | case KVM_GET_CLOCK: { | |
afbcf7ab GC |
4507 | struct kvm_clock_data user_ns; |
4508 | u64 now_ns; | |
4509 | ||
e891a32e | 4510 | now_ns = get_kvmclock_ns(kvm); |
108b249c | 4511 | user_ns.clock = now_ns; |
e3fd9a93 | 4512 | user_ns.flags = kvm->arch.use_master_clock ? KVM_CLOCK_TSC_STABLE : 0; |
97e69aa6 | 4513 | memset(&user_ns.pad, 0, sizeof(user_ns.pad)); |
afbcf7ab GC |
4514 | |
4515 | r = -EFAULT; | |
4516 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
4517 | goto out; | |
4518 | r = 0; | |
4519 | break; | |
4520 | } | |
90de4a18 NA |
4521 | case KVM_ENABLE_CAP: { |
4522 | struct kvm_enable_cap cap; | |
afbcf7ab | 4523 | |
90de4a18 NA |
4524 | r = -EFAULT; |
4525 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
4526 | goto out; | |
4527 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
4528 | break; | |
4529 | } | |
5acc5c06 BS |
4530 | case KVM_MEMORY_ENCRYPT_OP: { |
4531 | r = -ENOTTY; | |
4532 | if (kvm_x86_ops->mem_enc_op) | |
4533 | r = kvm_x86_ops->mem_enc_op(kvm, argp); | |
4534 | break; | |
4535 | } | |
69eaedee BS |
4536 | case KVM_MEMORY_ENCRYPT_REG_REGION: { |
4537 | struct kvm_enc_region region; | |
4538 | ||
4539 | r = -EFAULT; | |
4540 | if (copy_from_user(®ion, argp, sizeof(region))) | |
4541 | goto out; | |
4542 | ||
4543 | r = -ENOTTY; | |
4544 | if (kvm_x86_ops->mem_enc_reg_region) | |
4545 | r = kvm_x86_ops->mem_enc_reg_region(kvm, ®ion); | |
4546 | break; | |
4547 | } | |
4548 | case KVM_MEMORY_ENCRYPT_UNREG_REGION: { | |
4549 | struct kvm_enc_region region; | |
4550 | ||
4551 | r = -EFAULT; | |
4552 | if (copy_from_user(®ion, argp, sizeof(region))) | |
4553 | goto out; | |
4554 | ||
4555 | r = -ENOTTY; | |
4556 | if (kvm_x86_ops->mem_enc_unreg_region) | |
4557 | r = kvm_x86_ops->mem_enc_unreg_region(kvm, ®ion); | |
4558 | break; | |
4559 | } | |
faeb7833 RK |
4560 | case KVM_HYPERV_EVENTFD: { |
4561 | struct kvm_hyperv_eventfd hvevfd; | |
4562 | ||
4563 | r = -EFAULT; | |
4564 | if (copy_from_user(&hvevfd, argp, sizeof(hvevfd))) | |
4565 | goto out; | |
4566 | r = kvm_vm_ioctl_hv_eventfd(kvm, &hvevfd); | |
4567 | break; | |
4568 | } | |
1fe779f8 | 4569 | default: |
ad6260da | 4570 | r = -ENOTTY; |
1fe779f8 CO |
4571 | } |
4572 | out: | |
4573 | return r; | |
4574 | } | |
4575 | ||
a16b043c | 4576 | static void kvm_init_msr_list(void) |
043405e1 CO |
4577 | { |
4578 | u32 dummy[2]; | |
4579 | unsigned i, j; | |
4580 | ||
62ef68bb | 4581 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { |
043405e1 CO |
4582 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
4583 | continue; | |
93c4adc7 PB |
4584 | |
4585 | /* | |
4586 | * Even MSRs that are valid in the host may not be exposed | |
9dbe6cf9 | 4587 | * to the guests in some cases. |
93c4adc7 PB |
4588 | */ |
4589 | switch (msrs_to_save[i]) { | |
4590 | case MSR_IA32_BNDCFGS: | |
4591 | if (!kvm_x86_ops->mpx_supported()) | |
4592 | continue; | |
4593 | break; | |
9dbe6cf9 PB |
4594 | case MSR_TSC_AUX: |
4595 | if (!kvm_x86_ops->rdtscp_supported()) | |
4596 | continue; | |
4597 | break; | |
93c4adc7 PB |
4598 | default: |
4599 | break; | |
4600 | } | |
4601 | ||
043405e1 CO |
4602 | if (j < i) |
4603 | msrs_to_save[j] = msrs_to_save[i]; | |
4604 | j++; | |
4605 | } | |
4606 | num_msrs_to_save = j; | |
62ef68bb PB |
4607 | |
4608 | for (i = j = 0; i < ARRAY_SIZE(emulated_msrs); i++) { | |
4609 | switch (emulated_msrs[i]) { | |
6d396b55 PB |
4610 | case MSR_IA32_SMBASE: |
4611 | if (!kvm_x86_ops->cpu_has_high_real_mode_segbase()) | |
4612 | continue; | |
4613 | break; | |
62ef68bb PB |
4614 | default: |
4615 | break; | |
4616 | } | |
4617 | ||
4618 | if (j < i) | |
4619 | emulated_msrs[j] = emulated_msrs[i]; | |
4620 | j++; | |
4621 | } | |
4622 | num_emulated_msrs = j; | |
801e459a TL |
4623 | |
4624 | for (i = j = 0; i < ARRAY_SIZE(msr_based_features); i++) { | |
4625 | struct kvm_msr_entry msr; | |
4626 | ||
4627 | msr.index = msr_based_features[i]; | |
66421c1e | 4628 | if (kvm_get_msr_feature(&msr)) |
801e459a TL |
4629 | continue; |
4630 | ||
4631 | if (j < i) | |
4632 | msr_based_features[j] = msr_based_features[i]; | |
4633 | j++; | |
4634 | } | |
4635 | num_msr_based_features = j; | |
043405e1 CO |
4636 | } |
4637 | ||
bda9020e MT |
4638 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
4639 | const void *v) | |
bbd9b64e | 4640 | { |
70252a10 AK |
4641 | int handled = 0; |
4642 | int n; | |
4643 | ||
4644 | do { | |
4645 | n = min(len, 8); | |
bce87cce | 4646 | if (!(lapic_in_kernel(vcpu) && |
e32edf4f NN |
4647 | !kvm_iodevice_write(vcpu, &vcpu->arch.apic->dev, addr, n, v)) |
4648 | && kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, n, v)) | |
70252a10 AK |
4649 | break; |
4650 | handled += n; | |
4651 | addr += n; | |
4652 | len -= n; | |
4653 | v += n; | |
4654 | } while (len); | |
bbd9b64e | 4655 | |
70252a10 | 4656 | return handled; |
bbd9b64e CO |
4657 | } |
4658 | ||
bda9020e | 4659 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 4660 | { |
70252a10 AK |
4661 | int handled = 0; |
4662 | int n; | |
4663 | ||
4664 | do { | |
4665 | n = min(len, 8); | |
bce87cce | 4666 | if (!(lapic_in_kernel(vcpu) && |
e32edf4f NN |
4667 | !kvm_iodevice_read(vcpu, &vcpu->arch.apic->dev, |
4668 | addr, n, v)) | |
4669 | && kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, n, v)) | |
70252a10 | 4670 | break; |
e39d200f | 4671 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, v); |
70252a10 AK |
4672 | handled += n; |
4673 | addr += n; | |
4674 | len -= n; | |
4675 | v += n; | |
4676 | } while (len); | |
bbd9b64e | 4677 | |
70252a10 | 4678 | return handled; |
bbd9b64e CO |
4679 | } |
4680 | ||
2dafc6c2 GN |
4681 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
4682 | struct kvm_segment *var, int seg) | |
4683 | { | |
4684 | kvm_x86_ops->set_segment(vcpu, var, seg); | |
4685 | } | |
4686 | ||
4687 | void kvm_get_segment(struct kvm_vcpu *vcpu, | |
4688 | struct kvm_segment *var, int seg) | |
4689 | { | |
4690 | kvm_x86_ops->get_segment(vcpu, var, seg); | |
4691 | } | |
4692 | ||
54987b7a PB |
4693 | gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access, |
4694 | struct x86_exception *exception) | |
02f59dc9 JR |
4695 | { |
4696 | gpa_t t_gpa; | |
02f59dc9 JR |
4697 | |
4698 | BUG_ON(!mmu_is_nested(vcpu)); | |
4699 | ||
4700 | /* NPT walks are always user-walks */ | |
4701 | access |= PFERR_USER_MASK; | |
54987b7a | 4702 | t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, exception); |
02f59dc9 JR |
4703 | |
4704 | return t_gpa; | |
4705 | } | |
4706 | ||
ab9ae313 AK |
4707 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, |
4708 | struct x86_exception *exception) | |
1871c602 GN |
4709 | { |
4710 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
ab9ae313 | 4711 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4712 | } |
4713 | ||
ab9ae313 AK |
4714 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, |
4715 | struct x86_exception *exception) | |
1871c602 GN |
4716 | { |
4717 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
4718 | access |= PFERR_FETCH_MASK; | |
ab9ae313 | 4719 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4720 | } |
4721 | ||
ab9ae313 AK |
4722 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, |
4723 | struct x86_exception *exception) | |
1871c602 GN |
4724 | { |
4725 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
4726 | access |= PFERR_WRITE_MASK; | |
ab9ae313 | 4727 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
4728 | } |
4729 | ||
4730 | /* uses this to access any guest's mapped memory without checking CPL */ | |
ab9ae313 AK |
4731 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, |
4732 | struct x86_exception *exception) | |
1871c602 | 4733 | { |
ab9ae313 | 4734 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception); |
1871c602 GN |
4735 | } |
4736 | ||
4737 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
4738 | struct kvm_vcpu *vcpu, u32 access, | |
bcc55cba | 4739 | struct x86_exception *exception) |
bbd9b64e CO |
4740 | { |
4741 | void *data = val; | |
10589a46 | 4742 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
4743 | |
4744 | while (bytes) { | |
14dfe855 | 4745 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access, |
ab9ae313 | 4746 | exception); |
bbd9b64e | 4747 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 4748 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
4749 | int ret; |
4750 | ||
bcc55cba | 4751 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4752 | return X86EMUL_PROPAGATE_FAULT; |
54bf36aa PB |
4753 | ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, data, |
4754 | offset, toread); | |
10589a46 | 4755 | if (ret < 0) { |
c3cd7ffa | 4756 | r = X86EMUL_IO_NEEDED; |
10589a46 MT |
4757 | goto out; |
4758 | } | |
bbd9b64e | 4759 | |
77c2002e IE |
4760 | bytes -= toread; |
4761 | data += toread; | |
4762 | addr += toread; | |
bbd9b64e | 4763 | } |
10589a46 | 4764 | out: |
10589a46 | 4765 | return r; |
bbd9b64e | 4766 | } |
77c2002e | 4767 | |
1871c602 | 4768 | /* used for instruction fetching */ |
0f65dd70 AK |
4769 | static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt, |
4770 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4771 | struct x86_exception *exception) |
1871c602 | 4772 | { |
0f65dd70 | 4773 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4774 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
44583cba PB |
4775 | unsigned offset; |
4776 | int ret; | |
0f65dd70 | 4777 | |
44583cba PB |
4778 | /* Inline kvm_read_guest_virt_helper for speed. */ |
4779 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access|PFERR_FETCH_MASK, | |
4780 | exception); | |
4781 | if (unlikely(gpa == UNMAPPED_GVA)) | |
4782 | return X86EMUL_PROPAGATE_FAULT; | |
4783 | ||
4784 | offset = addr & (PAGE_SIZE-1); | |
4785 | if (WARN_ON(offset + bytes > PAGE_SIZE)) | |
4786 | bytes = (unsigned)PAGE_SIZE - offset; | |
54bf36aa PB |
4787 | ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, val, |
4788 | offset, bytes); | |
44583cba PB |
4789 | if (unlikely(ret < 0)) |
4790 | return X86EMUL_IO_NEEDED; | |
4791 | ||
4792 | return X86EMUL_CONTINUE; | |
1871c602 GN |
4793 | } |
4794 | ||
064aea77 | 4795 | int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4796 | gva_t addr, void *val, unsigned int bytes, |
bcc55cba | 4797 | struct x86_exception *exception) |
1871c602 | 4798 | { |
0f65dd70 | 4799 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4800 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
0f65dd70 | 4801 | |
1871c602 | 4802 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, |
bcc55cba | 4803 | exception); |
1871c602 | 4804 | } |
064aea77 | 4805 | EXPORT_SYMBOL_GPL(kvm_read_guest_virt); |
1871c602 | 4806 | |
0f65dd70 AK |
4807 | static int kvm_read_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
4808 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4809 | struct x86_exception *exception) |
1871c602 | 4810 | { |
0f65dd70 | 4811 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
bcc55cba | 4812 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception); |
1871c602 GN |
4813 | } |
4814 | ||
7a036a6f RK |
4815 | static int kvm_read_guest_phys_system(struct x86_emulate_ctxt *ctxt, |
4816 | unsigned long addr, void *val, unsigned int bytes) | |
4817 | { | |
4818 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4819 | int r = kvm_vcpu_read_guest(vcpu, addr, val, bytes); | |
4820 | ||
4821 | return r < 0 ? X86EMUL_IO_NEEDED : X86EMUL_CONTINUE; | |
4822 | } | |
4823 | ||
6a4d7550 | 4824 | int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4825 | gva_t addr, void *val, |
2dafc6c2 | 4826 | unsigned int bytes, |
bcc55cba | 4827 | struct x86_exception *exception) |
77c2002e | 4828 | { |
0f65dd70 | 4829 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
77c2002e IE |
4830 | void *data = val; |
4831 | int r = X86EMUL_CONTINUE; | |
4832 | ||
4833 | while (bytes) { | |
14dfe855 JR |
4834 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, |
4835 | PFERR_WRITE_MASK, | |
ab9ae313 | 4836 | exception); |
77c2002e IE |
4837 | unsigned offset = addr & (PAGE_SIZE-1); |
4838 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
4839 | int ret; | |
4840 | ||
bcc55cba | 4841 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4842 | return X86EMUL_PROPAGATE_FAULT; |
54bf36aa | 4843 | ret = kvm_vcpu_write_guest(vcpu, gpa, data, towrite); |
77c2002e | 4844 | if (ret < 0) { |
c3cd7ffa | 4845 | r = X86EMUL_IO_NEEDED; |
77c2002e IE |
4846 | goto out; |
4847 | } | |
4848 | ||
4849 | bytes -= towrite; | |
4850 | data += towrite; | |
4851 | addr += towrite; | |
4852 | } | |
4853 | out: | |
4854 | return r; | |
4855 | } | |
6a4d7550 | 4856 | EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system); |
77c2002e | 4857 | |
082d06ed WL |
4858 | int handle_ud(struct kvm_vcpu *vcpu) |
4859 | { | |
6c86eedc | 4860 | int emul_type = EMULTYPE_TRAP_UD; |
082d06ed | 4861 | enum emulation_result er; |
6c86eedc WL |
4862 | char sig[5]; /* ud2; .ascii "kvm" */ |
4863 | struct x86_exception e; | |
4864 | ||
4865 | if (force_emulation_prefix && | |
4866 | kvm_read_guest_virt(&vcpu->arch.emulate_ctxt, | |
4867 | kvm_get_linear_rip(vcpu), sig, sizeof(sig), &e) == 0 && | |
4868 | memcmp(sig, "\xf\xbkvm", sizeof(sig)) == 0) { | |
4869 | kvm_rip_write(vcpu, kvm_rip_read(vcpu) + sizeof(sig)); | |
4870 | emul_type = 0; | |
4871 | } | |
082d06ed | 4872 | |
6c86eedc | 4873 | er = emulate_instruction(vcpu, emul_type); |
082d06ed WL |
4874 | if (er == EMULATE_USER_EXIT) |
4875 | return 0; | |
4876 | if (er != EMULATE_DONE) | |
4877 | kvm_queue_exception(vcpu, UD_VECTOR); | |
4878 | return 1; | |
4879 | } | |
4880 | EXPORT_SYMBOL_GPL(handle_ud); | |
4881 | ||
0f89b207 TL |
4882 | static int vcpu_is_mmio_gpa(struct kvm_vcpu *vcpu, unsigned long gva, |
4883 | gpa_t gpa, bool write) | |
4884 | { | |
4885 | /* For APIC access vmexit */ | |
4886 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4887 | return 1; | |
4888 | ||
4889 | if (vcpu_match_mmio_gpa(vcpu, gpa)) { | |
4890 | trace_vcpu_match_mmio(gva, gpa, write, true); | |
4891 | return 1; | |
4892 | } | |
4893 | ||
4894 | return 0; | |
4895 | } | |
4896 | ||
af7cc7d1 XG |
4897 | static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva, |
4898 | gpa_t *gpa, struct x86_exception *exception, | |
4899 | bool write) | |
4900 | { | |
97d64b78 AK |
4901 | u32 access = ((kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0) |
4902 | | (write ? PFERR_WRITE_MASK : 0); | |
af7cc7d1 | 4903 | |
be94f6b7 HH |
4904 | /* |
4905 | * currently PKRU is only applied to ept enabled guest so | |
4906 | * there is no pkey in EPT page table for L1 guest or EPT | |
4907 | * shadow page table for L2 guest. | |
4908 | */ | |
97d64b78 | 4909 | if (vcpu_match_mmio_gva(vcpu, gva) |
97ec8c06 | 4910 | && !permission_fault(vcpu, vcpu->arch.walk_mmu, |
be94f6b7 | 4911 | vcpu->arch.access, 0, access)) { |
bebb106a XG |
4912 | *gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT | |
4913 | (gva & (PAGE_SIZE - 1)); | |
4f022648 | 4914 | trace_vcpu_match_mmio(gva, *gpa, write, false); |
bebb106a XG |
4915 | return 1; |
4916 | } | |
4917 | ||
af7cc7d1 XG |
4918 | *gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
4919 | ||
4920 | if (*gpa == UNMAPPED_GVA) | |
4921 | return -1; | |
4922 | ||
0f89b207 | 4923 | return vcpu_is_mmio_gpa(vcpu, gva, *gpa, write); |
af7cc7d1 XG |
4924 | } |
4925 | ||
3200f405 | 4926 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
bcc55cba | 4927 | const void *val, int bytes) |
bbd9b64e CO |
4928 | { |
4929 | int ret; | |
4930 | ||
54bf36aa | 4931 | ret = kvm_vcpu_write_guest(vcpu, gpa, val, bytes); |
9f811285 | 4932 | if (ret < 0) |
bbd9b64e | 4933 | return 0; |
0eb05bf2 | 4934 | kvm_page_track_write(vcpu, gpa, val, bytes); |
bbd9b64e CO |
4935 | return 1; |
4936 | } | |
4937 | ||
77d197b2 XG |
4938 | struct read_write_emulator_ops { |
4939 | int (*read_write_prepare)(struct kvm_vcpu *vcpu, void *val, | |
4940 | int bytes); | |
4941 | int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4942 | void *val, int bytes); | |
4943 | int (*read_write_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4944 | int bytes, void *val); | |
4945 | int (*read_write_exit_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4946 | void *val, int bytes); | |
4947 | bool write; | |
4948 | }; | |
4949 | ||
4950 | static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes) | |
4951 | { | |
4952 | if (vcpu->mmio_read_completed) { | |
77d197b2 | 4953 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
e39d200f | 4954 | vcpu->mmio_fragments[0].gpa, val); |
77d197b2 XG |
4955 | vcpu->mmio_read_completed = 0; |
4956 | return 1; | |
4957 | } | |
4958 | ||
4959 | return 0; | |
4960 | } | |
4961 | ||
4962 | static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4963 | void *val, int bytes) | |
4964 | { | |
54bf36aa | 4965 | return !kvm_vcpu_read_guest(vcpu, gpa, val, bytes); |
77d197b2 XG |
4966 | } |
4967 | ||
4968 | static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4969 | void *val, int bytes) | |
4970 | { | |
4971 | return emulator_write_phys(vcpu, gpa, val, bytes); | |
4972 | } | |
4973 | ||
4974 | static int write_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val) | |
4975 | { | |
e39d200f | 4976 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, val); |
77d197b2 XG |
4977 | return vcpu_mmio_write(vcpu, gpa, bytes, val); |
4978 | } | |
4979 | ||
4980 | static int read_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4981 | void *val, int bytes) | |
4982 | { | |
e39d200f | 4983 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, NULL); |
77d197b2 XG |
4984 | return X86EMUL_IO_NEEDED; |
4985 | } | |
4986 | ||
4987 | static int write_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4988 | void *val, int bytes) | |
4989 | { | |
f78146b0 AK |
4990 | struct kvm_mmio_fragment *frag = &vcpu->mmio_fragments[0]; |
4991 | ||
87da7e66 | 4992 | memcpy(vcpu->run->mmio.data, frag->data, min(8u, frag->len)); |
77d197b2 XG |
4993 | return X86EMUL_CONTINUE; |
4994 | } | |
4995 | ||
0fbe9b0b | 4996 | static const struct read_write_emulator_ops read_emultor = { |
77d197b2 XG |
4997 | .read_write_prepare = read_prepare, |
4998 | .read_write_emulate = read_emulate, | |
4999 | .read_write_mmio = vcpu_mmio_read, | |
5000 | .read_write_exit_mmio = read_exit_mmio, | |
5001 | }; | |
5002 | ||
0fbe9b0b | 5003 | static const struct read_write_emulator_ops write_emultor = { |
77d197b2 XG |
5004 | .read_write_emulate = write_emulate, |
5005 | .read_write_mmio = write_mmio, | |
5006 | .read_write_exit_mmio = write_exit_mmio, | |
5007 | .write = true, | |
5008 | }; | |
5009 | ||
22388a3c XG |
5010 | static int emulator_read_write_onepage(unsigned long addr, void *val, |
5011 | unsigned int bytes, | |
5012 | struct x86_exception *exception, | |
5013 | struct kvm_vcpu *vcpu, | |
0fbe9b0b | 5014 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 5015 | { |
af7cc7d1 XG |
5016 | gpa_t gpa; |
5017 | int handled, ret; | |
22388a3c | 5018 | bool write = ops->write; |
f78146b0 | 5019 | struct kvm_mmio_fragment *frag; |
0f89b207 TL |
5020 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
5021 | ||
5022 | /* | |
5023 | * If the exit was due to a NPF we may already have a GPA. | |
5024 | * If the GPA is present, use it to avoid the GVA to GPA table walk. | |
5025 | * Note, this cannot be used on string operations since string | |
5026 | * operation using rep will only have the initial GPA from the NPF | |
5027 | * occurred. | |
5028 | */ | |
5029 | if (vcpu->arch.gpa_available && | |
5030 | emulator_can_use_gpa(ctxt) && | |
618232e2 BS |
5031 | (addr & ~PAGE_MASK) == (vcpu->arch.gpa_val & ~PAGE_MASK)) { |
5032 | gpa = vcpu->arch.gpa_val; | |
5033 | ret = vcpu_is_mmio_gpa(vcpu, addr, gpa, write); | |
5034 | } else { | |
5035 | ret = vcpu_mmio_gva_to_gpa(vcpu, addr, &gpa, exception, write); | |
5036 | if (ret < 0) | |
5037 | return X86EMUL_PROPAGATE_FAULT; | |
0f89b207 | 5038 | } |
10589a46 | 5039 | |
618232e2 | 5040 | if (!ret && ops->read_write_emulate(vcpu, gpa, val, bytes)) |
bbd9b64e CO |
5041 | return X86EMUL_CONTINUE; |
5042 | ||
bbd9b64e CO |
5043 | /* |
5044 | * Is this MMIO handled locally? | |
5045 | */ | |
22388a3c | 5046 | handled = ops->read_write_mmio(vcpu, gpa, bytes, val); |
70252a10 | 5047 | if (handled == bytes) |
bbd9b64e | 5048 | return X86EMUL_CONTINUE; |
bbd9b64e | 5049 | |
70252a10 AK |
5050 | gpa += handled; |
5051 | bytes -= handled; | |
5052 | val += handled; | |
5053 | ||
87da7e66 XG |
5054 | WARN_ON(vcpu->mmio_nr_fragments >= KVM_MAX_MMIO_FRAGMENTS); |
5055 | frag = &vcpu->mmio_fragments[vcpu->mmio_nr_fragments++]; | |
5056 | frag->gpa = gpa; | |
5057 | frag->data = val; | |
5058 | frag->len = bytes; | |
f78146b0 | 5059 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
5060 | } |
5061 | ||
52eb5a6d XL |
5062 | static int emulator_read_write(struct x86_emulate_ctxt *ctxt, |
5063 | unsigned long addr, | |
22388a3c XG |
5064 | void *val, unsigned int bytes, |
5065 | struct x86_exception *exception, | |
0fbe9b0b | 5066 | const struct read_write_emulator_ops *ops) |
bbd9b64e | 5067 | { |
0f65dd70 | 5068 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
f78146b0 AK |
5069 | gpa_t gpa; |
5070 | int rc; | |
5071 | ||
5072 | if (ops->read_write_prepare && | |
5073 | ops->read_write_prepare(vcpu, val, bytes)) | |
5074 | return X86EMUL_CONTINUE; | |
5075 | ||
5076 | vcpu->mmio_nr_fragments = 0; | |
0f65dd70 | 5077 | |
bbd9b64e CO |
5078 | /* Crossing a page boundary? */ |
5079 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
f78146b0 | 5080 | int now; |
bbd9b64e CO |
5081 | |
5082 | now = -addr & ~PAGE_MASK; | |
22388a3c XG |
5083 | rc = emulator_read_write_onepage(addr, val, now, exception, |
5084 | vcpu, ops); | |
5085 | ||
bbd9b64e CO |
5086 | if (rc != X86EMUL_CONTINUE) |
5087 | return rc; | |
5088 | addr += now; | |
bac15531 NA |
5089 | if (ctxt->mode != X86EMUL_MODE_PROT64) |
5090 | addr = (u32)addr; | |
bbd9b64e CO |
5091 | val += now; |
5092 | bytes -= now; | |
5093 | } | |
22388a3c | 5094 | |
f78146b0 AK |
5095 | rc = emulator_read_write_onepage(addr, val, bytes, exception, |
5096 | vcpu, ops); | |
5097 | if (rc != X86EMUL_CONTINUE) | |
5098 | return rc; | |
5099 | ||
5100 | if (!vcpu->mmio_nr_fragments) | |
5101 | return rc; | |
5102 | ||
5103 | gpa = vcpu->mmio_fragments[0].gpa; | |
5104 | ||
5105 | vcpu->mmio_needed = 1; | |
5106 | vcpu->mmio_cur_fragment = 0; | |
5107 | ||
87da7e66 | 5108 | vcpu->run->mmio.len = min(8u, vcpu->mmio_fragments[0].len); |
f78146b0 AK |
5109 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = ops->write; |
5110 | vcpu->run->exit_reason = KVM_EXIT_MMIO; | |
5111 | vcpu->run->mmio.phys_addr = gpa; | |
5112 | ||
5113 | return ops->read_write_exit_mmio(vcpu, gpa, val, bytes); | |
22388a3c XG |
5114 | } |
5115 | ||
5116 | static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt, | |
5117 | unsigned long addr, | |
5118 | void *val, | |
5119 | unsigned int bytes, | |
5120 | struct x86_exception *exception) | |
5121 | { | |
5122 | return emulator_read_write(ctxt, addr, val, bytes, | |
5123 | exception, &read_emultor); | |
5124 | } | |
5125 | ||
52eb5a6d | 5126 | static int emulator_write_emulated(struct x86_emulate_ctxt *ctxt, |
22388a3c XG |
5127 | unsigned long addr, |
5128 | const void *val, | |
5129 | unsigned int bytes, | |
5130 | struct x86_exception *exception) | |
5131 | { | |
5132 | return emulator_read_write(ctxt, addr, (void *)val, bytes, | |
5133 | exception, &write_emultor); | |
bbd9b64e | 5134 | } |
bbd9b64e | 5135 | |
daea3e73 AK |
5136 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
5137 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) | |
5138 | ||
5139 | #ifdef CONFIG_X86_64 | |
5140 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) | |
5141 | #else | |
5142 | # define CMPXCHG64(ptr, old, new) \ | |
9749a6c0 | 5143 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
daea3e73 AK |
5144 | #endif |
5145 | ||
0f65dd70 AK |
5146 | static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, |
5147 | unsigned long addr, | |
bbd9b64e CO |
5148 | const void *old, |
5149 | const void *new, | |
5150 | unsigned int bytes, | |
0f65dd70 | 5151 | struct x86_exception *exception) |
bbd9b64e | 5152 | { |
0f65dd70 | 5153 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
daea3e73 AK |
5154 | gpa_t gpa; |
5155 | struct page *page; | |
5156 | char *kaddr; | |
5157 | bool exchanged; | |
2bacc55c | 5158 | |
daea3e73 AK |
5159 | /* guests cmpxchg8b have to be emulated atomically */ |
5160 | if (bytes > 8 || (bytes & (bytes - 1))) | |
5161 | goto emul_write; | |
10589a46 | 5162 | |
daea3e73 | 5163 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
2bacc55c | 5164 | |
daea3e73 AK |
5165 | if (gpa == UNMAPPED_GVA || |
5166 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
5167 | goto emul_write; | |
2bacc55c | 5168 | |
daea3e73 AK |
5169 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
5170 | goto emul_write; | |
72dc67a6 | 5171 | |
54bf36aa | 5172 | page = kvm_vcpu_gfn_to_page(vcpu, gpa >> PAGE_SHIFT); |
32cad84f | 5173 | if (is_error_page(page)) |
c19b8bd6 | 5174 | goto emul_write; |
72dc67a6 | 5175 | |
8fd75e12 | 5176 | kaddr = kmap_atomic(page); |
daea3e73 AK |
5177 | kaddr += offset_in_page(gpa); |
5178 | switch (bytes) { | |
5179 | case 1: | |
5180 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); | |
5181 | break; | |
5182 | case 2: | |
5183 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); | |
5184 | break; | |
5185 | case 4: | |
5186 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); | |
5187 | break; | |
5188 | case 8: | |
5189 | exchanged = CMPXCHG64(kaddr, old, new); | |
5190 | break; | |
5191 | default: | |
5192 | BUG(); | |
2bacc55c | 5193 | } |
8fd75e12 | 5194 | kunmap_atomic(kaddr); |
daea3e73 AK |
5195 | kvm_release_page_dirty(page); |
5196 | ||
5197 | if (!exchanged) | |
5198 | return X86EMUL_CMPXCHG_FAILED; | |
5199 | ||
54bf36aa | 5200 | kvm_vcpu_mark_page_dirty(vcpu, gpa >> PAGE_SHIFT); |
0eb05bf2 | 5201 | kvm_page_track_write(vcpu, gpa, new, bytes); |
8f6abd06 GN |
5202 | |
5203 | return X86EMUL_CONTINUE; | |
4a5f48f6 | 5204 | |
3200f405 | 5205 | emul_write: |
daea3e73 | 5206 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c | 5207 | |
0f65dd70 | 5208 | return emulator_write_emulated(ctxt, addr, new, bytes, exception); |
bbd9b64e CO |
5209 | } |
5210 | ||
cf8f70bf GN |
5211 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
5212 | { | |
cbfc6c91 | 5213 | int r = 0, i; |
cf8f70bf | 5214 | |
cbfc6c91 WL |
5215 | for (i = 0; i < vcpu->arch.pio.count; i++) { |
5216 | if (vcpu->arch.pio.in) | |
5217 | r = kvm_io_bus_read(vcpu, KVM_PIO_BUS, vcpu->arch.pio.port, | |
5218 | vcpu->arch.pio.size, pd); | |
5219 | else | |
5220 | r = kvm_io_bus_write(vcpu, KVM_PIO_BUS, | |
5221 | vcpu->arch.pio.port, vcpu->arch.pio.size, | |
5222 | pd); | |
5223 | if (r) | |
5224 | break; | |
5225 | pd += vcpu->arch.pio.size; | |
5226 | } | |
cf8f70bf GN |
5227 | return r; |
5228 | } | |
5229 | ||
6f6fbe98 XG |
5230 | static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size, |
5231 | unsigned short port, void *val, | |
5232 | unsigned int count, bool in) | |
cf8f70bf | 5233 | { |
cf8f70bf | 5234 | vcpu->arch.pio.port = port; |
6f6fbe98 | 5235 | vcpu->arch.pio.in = in; |
7972995b | 5236 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
5237 | vcpu->arch.pio.size = size; |
5238 | ||
5239 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
7972995b | 5240 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
5241 | return 1; |
5242 | } | |
5243 | ||
5244 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
6f6fbe98 | 5245 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; |
cf8f70bf GN |
5246 | vcpu->run->io.size = size; |
5247 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
5248 | vcpu->run->io.count = count; | |
5249 | vcpu->run->io.port = port; | |
5250 | ||
5251 | return 0; | |
5252 | } | |
5253 | ||
6f6fbe98 XG |
5254 | static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt, |
5255 | int size, unsigned short port, void *val, | |
5256 | unsigned int count) | |
cf8f70bf | 5257 | { |
ca1d4a9e | 5258 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
6f6fbe98 | 5259 | int ret; |
ca1d4a9e | 5260 | |
6f6fbe98 XG |
5261 | if (vcpu->arch.pio.count) |
5262 | goto data_avail; | |
cf8f70bf | 5263 | |
cbfc6c91 WL |
5264 | memset(vcpu->arch.pio_data, 0, size * count); |
5265 | ||
6f6fbe98 XG |
5266 | ret = emulator_pio_in_out(vcpu, size, port, val, count, true); |
5267 | if (ret) { | |
5268 | data_avail: | |
5269 | memcpy(val, vcpu->arch.pio_data, size * count); | |
1171903d | 5270 | trace_kvm_pio(KVM_PIO_IN, port, size, count, vcpu->arch.pio_data); |
7972995b | 5271 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
5272 | return 1; |
5273 | } | |
5274 | ||
cf8f70bf GN |
5275 | return 0; |
5276 | } | |
5277 | ||
6f6fbe98 XG |
5278 | static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt, |
5279 | int size, unsigned short port, | |
5280 | const void *val, unsigned int count) | |
5281 | { | |
5282 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5283 | ||
5284 | memcpy(vcpu->arch.pio_data, val, size * count); | |
1171903d | 5285 | trace_kvm_pio(KVM_PIO_OUT, port, size, count, vcpu->arch.pio_data); |
6f6fbe98 XG |
5286 | return emulator_pio_in_out(vcpu, size, port, (void *)val, count, false); |
5287 | } | |
5288 | ||
bbd9b64e CO |
5289 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
5290 | { | |
5291 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
5292 | } | |
5293 | ||
3cb16fe7 | 5294 | static void emulator_invlpg(struct x86_emulate_ctxt *ctxt, ulong address) |
bbd9b64e | 5295 | { |
3cb16fe7 | 5296 | kvm_mmu_invlpg(emul_to_vcpu(ctxt), address); |
bbd9b64e CO |
5297 | } |
5298 | ||
ae6a2375 | 5299 | static int kvm_emulate_wbinvd_noskip(struct kvm_vcpu *vcpu) |
f5f48ee1 SY |
5300 | { |
5301 | if (!need_emulate_wbinvd(vcpu)) | |
5302 | return X86EMUL_CONTINUE; | |
5303 | ||
5304 | if (kvm_x86_ops->has_wbinvd_exit()) { | |
2eec7343 JK |
5305 | int cpu = get_cpu(); |
5306 | ||
5307 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
f5f48ee1 SY |
5308 | smp_call_function_many(vcpu->arch.wbinvd_dirty_mask, |
5309 | wbinvd_ipi, NULL, 1); | |
2eec7343 | 5310 | put_cpu(); |
f5f48ee1 | 5311 | cpumask_clear(vcpu->arch.wbinvd_dirty_mask); |
2eec7343 JK |
5312 | } else |
5313 | wbinvd(); | |
f5f48ee1 SY |
5314 | return X86EMUL_CONTINUE; |
5315 | } | |
5cb56059 JS |
5316 | |
5317 | int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
5318 | { | |
6affcbed KH |
5319 | kvm_emulate_wbinvd_noskip(vcpu); |
5320 | return kvm_skip_emulated_instruction(vcpu); | |
5cb56059 | 5321 | } |
f5f48ee1 SY |
5322 | EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd); |
5323 | ||
5cb56059 JS |
5324 | |
5325 | ||
bcaf5cc5 AK |
5326 | static void emulator_wbinvd(struct x86_emulate_ctxt *ctxt) |
5327 | { | |
5cb56059 | 5328 | kvm_emulate_wbinvd_noskip(emul_to_vcpu(ctxt)); |
bcaf5cc5 AK |
5329 | } |
5330 | ||
52eb5a6d XL |
5331 | static int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, |
5332 | unsigned long *dest) | |
bbd9b64e | 5333 | { |
16f8a6f9 | 5334 | return kvm_get_dr(emul_to_vcpu(ctxt), dr, dest); |
bbd9b64e CO |
5335 | } |
5336 | ||
52eb5a6d XL |
5337 | static int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, |
5338 | unsigned long value) | |
bbd9b64e | 5339 | { |
338dbc97 | 5340 | |
717746e3 | 5341 | return __kvm_set_dr(emul_to_vcpu(ctxt), dr, value); |
bbd9b64e CO |
5342 | } |
5343 | ||
52a46617 | 5344 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
5fdbf976 | 5345 | { |
52a46617 | 5346 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
5fdbf976 MT |
5347 | } |
5348 | ||
717746e3 | 5349 | static unsigned long emulator_get_cr(struct x86_emulate_ctxt *ctxt, int cr) |
bbd9b64e | 5350 | { |
717746e3 | 5351 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
52a46617 GN |
5352 | unsigned long value; |
5353 | ||
5354 | switch (cr) { | |
5355 | case 0: | |
5356 | value = kvm_read_cr0(vcpu); | |
5357 | break; | |
5358 | case 2: | |
5359 | value = vcpu->arch.cr2; | |
5360 | break; | |
5361 | case 3: | |
9f8fe504 | 5362 | value = kvm_read_cr3(vcpu); |
52a46617 GN |
5363 | break; |
5364 | case 4: | |
5365 | value = kvm_read_cr4(vcpu); | |
5366 | break; | |
5367 | case 8: | |
5368 | value = kvm_get_cr8(vcpu); | |
5369 | break; | |
5370 | default: | |
a737f256 | 5371 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
52a46617 GN |
5372 | return 0; |
5373 | } | |
5374 | ||
5375 | return value; | |
5376 | } | |
5377 | ||
717746e3 | 5378 | static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val) |
52a46617 | 5379 | { |
717746e3 | 5380 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
0f12244f GN |
5381 | int res = 0; |
5382 | ||
52a46617 GN |
5383 | switch (cr) { |
5384 | case 0: | |
49a9b07e | 5385 | res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
52a46617 GN |
5386 | break; |
5387 | case 2: | |
5388 | vcpu->arch.cr2 = val; | |
5389 | break; | |
5390 | case 3: | |
2390218b | 5391 | res = kvm_set_cr3(vcpu, val); |
52a46617 GN |
5392 | break; |
5393 | case 4: | |
a83b29c6 | 5394 | res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
52a46617 GN |
5395 | break; |
5396 | case 8: | |
eea1cff9 | 5397 | res = kvm_set_cr8(vcpu, val); |
52a46617 GN |
5398 | break; |
5399 | default: | |
a737f256 | 5400 | kvm_err("%s: unexpected cr %u\n", __func__, cr); |
0f12244f | 5401 | res = -1; |
52a46617 | 5402 | } |
0f12244f GN |
5403 | |
5404 | return res; | |
52a46617 GN |
5405 | } |
5406 | ||
717746e3 | 5407 | static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt) |
9c537244 | 5408 | { |
717746e3 | 5409 | return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt)); |
9c537244 GN |
5410 | } |
5411 | ||
4bff1e86 | 5412 | static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
2dafc6c2 | 5413 | { |
4bff1e86 | 5414 | kvm_x86_ops->get_gdt(emul_to_vcpu(ctxt), dt); |
2dafc6c2 GN |
5415 | } |
5416 | ||
4bff1e86 | 5417 | static void emulator_get_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
160ce1f1 | 5418 | { |
4bff1e86 | 5419 | kvm_x86_ops->get_idt(emul_to_vcpu(ctxt), dt); |
160ce1f1 MG |
5420 | } |
5421 | ||
1ac9d0cf AK |
5422 | static void emulator_set_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
5423 | { | |
5424 | kvm_x86_ops->set_gdt(emul_to_vcpu(ctxt), dt); | |
5425 | } | |
5426 | ||
5427 | static void emulator_set_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) | |
5428 | { | |
5429 | kvm_x86_ops->set_idt(emul_to_vcpu(ctxt), dt); | |
5430 | } | |
5431 | ||
4bff1e86 AK |
5432 | static unsigned long emulator_get_cached_segment_base( |
5433 | struct x86_emulate_ctxt *ctxt, int seg) | |
5951c442 | 5434 | { |
4bff1e86 | 5435 | return get_segment_base(emul_to_vcpu(ctxt), seg); |
5951c442 GN |
5436 | } |
5437 | ||
1aa36616 AK |
5438 | static bool emulator_get_segment(struct x86_emulate_ctxt *ctxt, u16 *selector, |
5439 | struct desc_struct *desc, u32 *base3, | |
5440 | int seg) | |
2dafc6c2 GN |
5441 | { |
5442 | struct kvm_segment var; | |
5443 | ||
4bff1e86 | 5444 | kvm_get_segment(emul_to_vcpu(ctxt), &var, seg); |
1aa36616 | 5445 | *selector = var.selector; |
2dafc6c2 | 5446 | |
378a8b09 GN |
5447 | if (var.unusable) { |
5448 | memset(desc, 0, sizeof(*desc)); | |
f0367ee1 RK |
5449 | if (base3) |
5450 | *base3 = 0; | |
2dafc6c2 | 5451 | return false; |
378a8b09 | 5452 | } |
2dafc6c2 GN |
5453 | |
5454 | if (var.g) | |
5455 | var.limit >>= 12; | |
5456 | set_desc_limit(desc, var.limit); | |
5457 | set_desc_base(desc, (unsigned long)var.base); | |
5601d05b GN |
5458 | #ifdef CONFIG_X86_64 |
5459 | if (base3) | |
5460 | *base3 = var.base >> 32; | |
5461 | #endif | |
2dafc6c2 GN |
5462 | desc->type = var.type; |
5463 | desc->s = var.s; | |
5464 | desc->dpl = var.dpl; | |
5465 | desc->p = var.present; | |
5466 | desc->avl = var.avl; | |
5467 | desc->l = var.l; | |
5468 | desc->d = var.db; | |
5469 | desc->g = var.g; | |
5470 | ||
5471 | return true; | |
5472 | } | |
5473 | ||
1aa36616 AK |
5474 | static void emulator_set_segment(struct x86_emulate_ctxt *ctxt, u16 selector, |
5475 | struct desc_struct *desc, u32 base3, | |
5476 | int seg) | |
2dafc6c2 | 5477 | { |
4bff1e86 | 5478 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
2dafc6c2 GN |
5479 | struct kvm_segment var; |
5480 | ||
1aa36616 | 5481 | var.selector = selector; |
2dafc6c2 | 5482 | var.base = get_desc_base(desc); |
5601d05b GN |
5483 | #ifdef CONFIG_X86_64 |
5484 | var.base |= ((u64)base3) << 32; | |
5485 | #endif | |
2dafc6c2 GN |
5486 | var.limit = get_desc_limit(desc); |
5487 | if (desc->g) | |
5488 | var.limit = (var.limit << 12) | 0xfff; | |
5489 | var.type = desc->type; | |
2dafc6c2 GN |
5490 | var.dpl = desc->dpl; |
5491 | var.db = desc->d; | |
5492 | var.s = desc->s; | |
5493 | var.l = desc->l; | |
5494 | var.g = desc->g; | |
5495 | var.avl = desc->avl; | |
5496 | var.present = desc->p; | |
5497 | var.unusable = !var.present; | |
5498 | var.padding = 0; | |
5499 | ||
5500 | kvm_set_segment(vcpu, &var, seg); | |
5501 | return; | |
5502 | } | |
5503 | ||
717746e3 AK |
5504 | static int emulator_get_msr(struct x86_emulate_ctxt *ctxt, |
5505 | u32 msr_index, u64 *pdata) | |
5506 | { | |
609e36d3 PB |
5507 | struct msr_data msr; |
5508 | int r; | |
5509 | ||
5510 | msr.index = msr_index; | |
5511 | msr.host_initiated = false; | |
5512 | r = kvm_get_msr(emul_to_vcpu(ctxt), &msr); | |
5513 | if (r) | |
5514 | return r; | |
5515 | ||
5516 | *pdata = msr.data; | |
5517 | return 0; | |
717746e3 AK |
5518 | } |
5519 | ||
5520 | static int emulator_set_msr(struct x86_emulate_ctxt *ctxt, | |
5521 | u32 msr_index, u64 data) | |
5522 | { | |
8fe8ab46 WA |
5523 | struct msr_data msr; |
5524 | ||
5525 | msr.data = data; | |
5526 | msr.index = msr_index; | |
5527 | msr.host_initiated = false; | |
5528 | return kvm_set_msr(emul_to_vcpu(ctxt), &msr); | |
717746e3 AK |
5529 | } |
5530 | ||
64d60670 PB |
5531 | static u64 emulator_get_smbase(struct x86_emulate_ctxt *ctxt) |
5532 | { | |
5533 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5534 | ||
5535 | return vcpu->arch.smbase; | |
5536 | } | |
5537 | ||
5538 | static void emulator_set_smbase(struct x86_emulate_ctxt *ctxt, u64 smbase) | |
5539 | { | |
5540 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5541 | ||
5542 | vcpu->arch.smbase = smbase; | |
5543 | } | |
5544 | ||
67f4d428 NA |
5545 | static int emulator_check_pmc(struct x86_emulate_ctxt *ctxt, |
5546 | u32 pmc) | |
5547 | { | |
c6702c9d | 5548 | return kvm_pmu_is_valid_msr_idx(emul_to_vcpu(ctxt), pmc); |
67f4d428 NA |
5549 | } |
5550 | ||
222d21aa AK |
5551 | static int emulator_read_pmc(struct x86_emulate_ctxt *ctxt, |
5552 | u32 pmc, u64 *pdata) | |
5553 | { | |
c6702c9d | 5554 | return kvm_pmu_rdpmc(emul_to_vcpu(ctxt), pmc, pdata); |
222d21aa AK |
5555 | } |
5556 | ||
6c3287f7 AK |
5557 | static void emulator_halt(struct x86_emulate_ctxt *ctxt) |
5558 | { | |
5559 | emul_to_vcpu(ctxt)->arch.halt_request = 1; | |
5560 | } | |
5561 | ||
2953538e | 5562 | static int emulator_intercept(struct x86_emulate_ctxt *ctxt, |
8a76d7f2 | 5563 | struct x86_instruction_info *info, |
c4f035c6 AK |
5564 | enum x86_intercept_stage stage) |
5565 | { | |
2953538e | 5566 | return kvm_x86_ops->check_intercept(emul_to_vcpu(ctxt), info, stage); |
c4f035c6 AK |
5567 | } |
5568 | ||
e911eb3b YZ |
5569 | static bool emulator_get_cpuid(struct x86_emulate_ctxt *ctxt, |
5570 | u32 *eax, u32 *ebx, u32 *ecx, u32 *edx, bool check_limit) | |
bdb42f5a | 5571 | { |
e911eb3b | 5572 | return kvm_cpuid(emul_to_vcpu(ctxt), eax, ebx, ecx, edx, check_limit); |
bdb42f5a SB |
5573 | } |
5574 | ||
dd856efa AK |
5575 | static ulong emulator_read_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg) |
5576 | { | |
5577 | return kvm_register_read(emul_to_vcpu(ctxt), reg); | |
5578 | } | |
5579 | ||
5580 | static void emulator_write_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg, ulong val) | |
5581 | { | |
5582 | kvm_register_write(emul_to_vcpu(ctxt), reg, val); | |
5583 | } | |
5584 | ||
801806d9 NA |
5585 | static void emulator_set_nmi_mask(struct x86_emulate_ctxt *ctxt, bool masked) |
5586 | { | |
5587 | kvm_x86_ops->set_nmi_mask(emul_to_vcpu(ctxt), masked); | |
5588 | } | |
5589 | ||
6ed071f0 LP |
5590 | static unsigned emulator_get_hflags(struct x86_emulate_ctxt *ctxt) |
5591 | { | |
5592 | return emul_to_vcpu(ctxt)->arch.hflags; | |
5593 | } | |
5594 | ||
5595 | static void emulator_set_hflags(struct x86_emulate_ctxt *ctxt, unsigned emul_flags) | |
5596 | { | |
5597 | kvm_set_hflags(emul_to_vcpu(ctxt), emul_flags); | |
5598 | } | |
5599 | ||
0234bf88 LP |
5600 | static int emulator_pre_leave_smm(struct x86_emulate_ctxt *ctxt, u64 smbase) |
5601 | { | |
5602 | return kvm_x86_ops->pre_leave_smm(emul_to_vcpu(ctxt), smbase); | |
5603 | } | |
5604 | ||
0225fb50 | 5605 | static const struct x86_emulate_ops emulate_ops = { |
dd856efa AK |
5606 | .read_gpr = emulator_read_gpr, |
5607 | .write_gpr = emulator_write_gpr, | |
1871c602 | 5608 | .read_std = kvm_read_guest_virt_system, |
2dafc6c2 | 5609 | .write_std = kvm_write_guest_virt_system, |
7a036a6f | 5610 | .read_phys = kvm_read_guest_phys_system, |
1871c602 | 5611 | .fetch = kvm_fetch_guest_virt, |
bbd9b64e CO |
5612 | .read_emulated = emulator_read_emulated, |
5613 | .write_emulated = emulator_write_emulated, | |
5614 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
3cb16fe7 | 5615 | .invlpg = emulator_invlpg, |
cf8f70bf GN |
5616 | .pio_in_emulated = emulator_pio_in_emulated, |
5617 | .pio_out_emulated = emulator_pio_out_emulated, | |
1aa36616 AK |
5618 | .get_segment = emulator_get_segment, |
5619 | .set_segment = emulator_set_segment, | |
5951c442 | 5620 | .get_cached_segment_base = emulator_get_cached_segment_base, |
2dafc6c2 | 5621 | .get_gdt = emulator_get_gdt, |
160ce1f1 | 5622 | .get_idt = emulator_get_idt, |
1ac9d0cf AK |
5623 | .set_gdt = emulator_set_gdt, |
5624 | .set_idt = emulator_set_idt, | |
52a46617 GN |
5625 | .get_cr = emulator_get_cr, |
5626 | .set_cr = emulator_set_cr, | |
9c537244 | 5627 | .cpl = emulator_get_cpl, |
35aa5375 GN |
5628 | .get_dr = emulator_get_dr, |
5629 | .set_dr = emulator_set_dr, | |
64d60670 PB |
5630 | .get_smbase = emulator_get_smbase, |
5631 | .set_smbase = emulator_set_smbase, | |
717746e3 AK |
5632 | .set_msr = emulator_set_msr, |
5633 | .get_msr = emulator_get_msr, | |
67f4d428 | 5634 | .check_pmc = emulator_check_pmc, |
222d21aa | 5635 | .read_pmc = emulator_read_pmc, |
6c3287f7 | 5636 | .halt = emulator_halt, |
bcaf5cc5 | 5637 | .wbinvd = emulator_wbinvd, |
d6aa1000 | 5638 | .fix_hypercall = emulator_fix_hypercall, |
c4f035c6 | 5639 | .intercept = emulator_intercept, |
bdb42f5a | 5640 | .get_cpuid = emulator_get_cpuid, |
801806d9 | 5641 | .set_nmi_mask = emulator_set_nmi_mask, |
6ed071f0 LP |
5642 | .get_hflags = emulator_get_hflags, |
5643 | .set_hflags = emulator_set_hflags, | |
0234bf88 | 5644 | .pre_leave_smm = emulator_pre_leave_smm, |
bbd9b64e CO |
5645 | }; |
5646 | ||
95cb2295 GN |
5647 | static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |
5648 | { | |
37ccdcbe | 5649 | u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu); |
95cb2295 GN |
5650 | /* |
5651 | * an sti; sti; sequence only disable interrupts for the first | |
5652 | * instruction. So, if the last instruction, be it emulated or | |
5653 | * not, left the system with the INT_STI flag enabled, it | |
5654 | * means that the last instruction is an sti. We should not | |
5655 | * leave the flag on in this case. The same goes for mov ss | |
5656 | */ | |
37ccdcbe PB |
5657 | if (int_shadow & mask) |
5658 | mask = 0; | |
6addfc42 | 5659 | if (unlikely(int_shadow || mask)) { |
95cb2295 | 5660 | kvm_x86_ops->set_interrupt_shadow(vcpu, mask); |
6addfc42 PB |
5661 | if (!mask) |
5662 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
5663 | } | |
95cb2295 GN |
5664 | } |
5665 | ||
ef54bcfe | 5666 | static bool inject_emulated_exception(struct kvm_vcpu *vcpu) |
54b8486f GN |
5667 | { |
5668 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; | |
da9cb575 | 5669 | if (ctxt->exception.vector == PF_VECTOR) |
ef54bcfe PB |
5670 | return kvm_propagate_fault(vcpu, &ctxt->exception); |
5671 | ||
5672 | if (ctxt->exception.error_code_valid) | |
da9cb575 AK |
5673 | kvm_queue_exception_e(vcpu, ctxt->exception.vector, |
5674 | ctxt->exception.error_code); | |
54b8486f | 5675 | else |
da9cb575 | 5676 | kvm_queue_exception(vcpu, ctxt->exception.vector); |
ef54bcfe | 5677 | return false; |
54b8486f GN |
5678 | } |
5679 | ||
8ec4722d MG |
5680 | static void init_emulate_ctxt(struct kvm_vcpu *vcpu) |
5681 | { | |
adf52235 | 5682 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d MG |
5683 | int cs_db, cs_l; |
5684 | ||
8ec4722d MG |
5685 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
5686 | ||
adf52235 | 5687 | ctxt->eflags = kvm_get_rflags(vcpu); |
c8401dda PB |
5688 | ctxt->tf = (ctxt->eflags & X86_EFLAGS_TF) != 0; |
5689 | ||
adf52235 TY |
5690 | ctxt->eip = kvm_rip_read(vcpu); |
5691 | ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : | |
5692 | (ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 : | |
42bf549f | 5693 | (cs_l && is_long_mode(vcpu)) ? X86EMUL_MODE_PROT64 : |
adf52235 TY |
5694 | cs_db ? X86EMUL_MODE_PROT32 : |
5695 | X86EMUL_MODE_PROT16; | |
a584539b | 5696 | BUILD_BUG_ON(HF_GUEST_MASK != X86EMUL_GUEST_MASK); |
64d60670 PB |
5697 | BUILD_BUG_ON(HF_SMM_MASK != X86EMUL_SMM_MASK); |
5698 | BUILD_BUG_ON(HF_SMM_INSIDE_NMI_MASK != X86EMUL_SMM_INSIDE_NMI_MASK); | |
adf52235 | 5699 | |
dd856efa | 5700 | init_decode_cache(ctxt); |
7ae441ea | 5701 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; |
8ec4722d MG |
5702 | } |
5703 | ||
71f9833b | 5704 | int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip) |
63995653 | 5705 | { |
9d74191a | 5706 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
63995653 MG |
5707 | int ret; |
5708 | ||
5709 | init_emulate_ctxt(vcpu); | |
5710 | ||
9dac77fa AK |
5711 | ctxt->op_bytes = 2; |
5712 | ctxt->ad_bytes = 2; | |
5713 | ctxt->_eip = ctxt->eip + inc_eip; | |
9d74191a | 5714 | ret = emulate_int_real(ctxt, irq); |
63995653 MG |
5715 | |
5716 | if (ret != X86EMUL_CONTINUE) | |
5717 | return EMULATE_FAIL; | |
5718 | ||
9dac77fa | 5719 | ctxt->eip = ctxt->_eip; |
9d74191a TY |
5720 | kvm_rip_write(vcpu, ctxt->eip); |
5721 | kvm_set_rflags(vcpu, ctxt->eflags); | |
63995653 | 5722 | |
63995653 MG |
5723 | return EMULATE_DONE; |
5724 | } | |
5725 | EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt); | |
5726 | ||
e2366171 | 5727 | static int handle_emulation_failure(struct kvm_vcpu *vcpu, int emulation_type) |
6d77dbfc | 5728 | { |
fc3a9157 JR |
5729 | int r = EMULATE_DONE; |
5730 | ||
6d77dbfc GN |
5731 | ++vcpu->stat.insn_emulation_fail; |
5732 | trace_kvm_emulate_insn_failed(vcpu); | |
e2366171 LA |
5733 | |
5734 | if (emulation_type & EMULTYPE_NO_UD_ON_FAIL) | |
5735 | return EMULATE_FAIL; | |
5736 | ||
a2b9e6c1 | 5737 | if (!is_guest_mode(vcpu) && kvm_x86_ops->get_cpl(vcpu) == 0) { |
fc3a9157 JR |
5738 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
5739 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
5740 | vcpu->run->internal.ndata = 0; | |
1f4dcb3b | 5741 | r = EMULATE_USER_EXIT; |
fc3a9157 | 5742 | } |
e2366171 | 5743 | |
6d77dbfc | 5744 | kvm_queue_exception(vcpu, UD_VECTOR); |
fc3a9157 JR |
5745 | |
5746 | return r; | |
6d77dbfc GN |
5747 | } |
5748 | ||
93c05d3e | 5749 | static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2, |
991eebf9 GN |
5750 | bool write_fault_to_shadow_pgtable, |
5751 | int emulation_type) | |
a6f177ef | 5752 | { |
95b3cf69 | 5753 | gpa_t gpa = cr2; |
ba049e93 | 5754 | kvm_pfn_t pfn; |
a6f177ef | 5755 | |
991eebf9 GN |
5756 | if (emulation_type & EMULTYPE_NO_REEXECUTE) |
5757 | return false; | |
5758 | ||
95b3cf69 XG |
5759 | if (!vcpu->arch.mmu.direct_map) { |
5760 | /* | |
5761 | * Write permission should be allowed since only | |
5762 | * write access need to be emulated. | |
5763 | */ | |
5764 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
a6f177ef | 5765 | |
95b3cf69 XG |
5766 | /* |
5767 | * If the mapping is invalid in guest, let cpu retry | |
5768 | * it to generate fault. | |
5769 | */ | |
5770 | if (gpa == UNMAPPED_GVA) | |
5771 | return true; | |
5772 | } | |
a6f177ef | 5773 | |
8e3d9d06 XG |
5774 | /* |
5775 | * Do not retry the unhandleable instruction if it faults on the | |
5776 | * readonly host memory, otherwise it will goto a infinite loop: | |
5777 | * retry instruction -> write #PF -> emulation fail -> retry | |
5778 | * instruction -> ... | |
5779 | */ | |
5780 | pfn = gfn_to_pfn(vcpu->kvm, gpa_to_gfn(gpa)); | |
95b3cf69 XG |
5781 | |
5782 | /* | |
5783 | * If the instruction failed on the error pfn, it can not be fixed, | |
5784 | * report the error to userspace. | |
5785 | */ | |
5786 | if (is_error_noslot_pfn(pfn)) | |
5787 | return false; | |
5788 | ||
5789 | kvm_release_pfn_clean(pfn); | |
5790 | ||
5791 | /* The instructions are well-emulated on direct mmu. */ | |
5792 | if (vcpu->arch.mmu.direct_map) { | |
5793 | unsigned int indirect_shadow_pages; | |
5794 | ||
5795 | spin_lock(&vcpu->kvm->mmu_lock); | |
5796 | indirect_shadow_pages = vcpu->kvm->arch.indirect_shadow_pages; | |
5797 | spin_unlock(&vcpu->kvm->mmu_lock); | |
5798 | ||
5799 | if (indirect_shadow_pages) | |
5800 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
5801 | ||
a6f177ef | 5802 | return true; |
8e3d9d06 | 5803 | } |
a6f177ef | 5804 | |
95b3cf69 XG |
5805 | /* |
5806 | * if emulation was due to access to shadowed page table | |
5807 | * and it failed try to unshadow page and re-enter the | |
5808 | * guest to let CPU execute the instruction. | |
5809 | */ | |
5810 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); | |
93c05d3e XG |
5811 | |
5812 | /* | |
5813 | * If the access faults on its page table, it can not | |
5814 | * be fixed by unprotecting shadow page and it should | |
5815 | * be reported to userspace. | |
5816 | */ | |
5817 | return !write_fault_to_shadow_pgtable; | |
a6f177ef GN |
5818 | } |
5819 | ||
1cb3f3ae XG |
5820 | static bool retry_instruction(struct x86_emulate_ctxt *ctxt, |
5821 | unsigned long cr2, int emulation_type) | |
5822 | { | |
5823 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
5824 | unsigned long last_retry_eip, last_retry_addr, gpa = cr2; | |
5825 | ||
5826 | last_retry_eip = vcpu->arch.last_retry_eip; | |
5827 | last_retry_addr = vcpu->arch.last_retry_addr; | |
5828 | ||
5829 | /* | |
5830 | * If the emulation is caused by #PF and it is non-page_table | |
5831 | * writing instruction, it means the VM-EXIT is caused by shadow | |
5832 | * page protected, we can zap the shadow page and retry this | |
5833 | * instruction directly. | |
5834 | * | |
5835 | * Note: if the guest uses a non-page-table modifying instruction | |
5836 | * on the PDE that points to the instruction, then we will unmap | |
5837 | * the instruction and go to an infinite loop. So, we cache the | |
5838 | * last retried eip and the last fault address, if we meet the eip | |
5839 | * and the address again, we can break out of the potential infinite | |
5840 | * loop. | |
5841 | */ | |
5842 | vcpu->arch.last_retry_eip = vcpu->arch.last_retry_addr = 0; | |
5843 | ||
5844 | if (!(emulation_type & EMULTYPE_RETRY)) | |
5845 | return false; | |
5846 | ||
5847 | if (x86_page_table_writing_insn(ctxt)) | |
5848 | return false; | |
5849 | ||
5850 | if (ctxt->eip == last_retry_eip && last_retry_addr == cr2) | |
5851 | return false; | |
5852 | ||
5853 | vcpu->arch.last_retry_eip = ctxt->eip; | |
5854 | vcpu->arch.last_retry_addr = cr2; | |
5855 | ||
5856 | if (!vcpu->arch.mmu.direct_map) | |
5857 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
5858 | ||
22368028 | 5859 | kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); |
1cb3f3ae XG |
5860 | |
5861 | return true; | |
5862 | } | |
5863 | ||
716d51ab GN |
5864 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu); |
5865 | static int complete_emulated_pio(struct kvm_vcpu *vcpu); | |
5866 | ||
64d60670 | 5867 | static void kvm_smm_changed(struct kvm_vcpu *vcpu) |
a584539b | 5868 | { |
64d60670 | 5869 | if (!(vcpu->arch.hflags & HF_SMM_MASK)) { |
660a5d51 PB |
5870 | /* This is a good place to trace that we are exiting SMM. */ |
5871 | trace_kvm_enter_smm(vcpu->vcpu_id, vcpu->arch.smbase, false); | |
5872 | ||
c43203ca PB |
5873 | /* Process a latched INIT or SMI, if any. */ |
5874 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
64d60670 | 5875 | } |
699023e2 PB |
5876 | |
5877 | kvm_mmu_reset_context(vcpu); | |
64d60670 PB |
5878 | } |
5879 | ||
5880 | static void kvm_set_hflags(struct kvm_vcpu *vcpu, unsigned emul_flags) | |
5881 | { | |
5882 | unsigned changed = vcpu->arch.hflags ^ emul_flags; | |
5883 | ||
a584539b | 5884 | vcpu->arch.hflags = emul_flags; |
64d60670 PB |
5885 | |
5886 | if (changed & HF_SMM_MASK) | |
5887 | kvm_smm_changed(vcpu); | |
a584539b PB |
5888 | } |
5889 | ||
4a1e10d5 PB |
5890 | static int kvm_vcpu_check_hw_bp(unsigned long addr, u32 type, u32 dr7, |
5891 | unsigned long *db) | |
5892 | { | |
5893 | u32 dr6 = 0; | |
5894 | int i; | |
5895 | u32 enable, rwlen; | |
5896 | ||
5897 | enable = dr7; | |
5898 | rwlen = dr7 >> 16; | |
5899 | for (i = 0; i < 4; i++, enable >>= 2, rwlen >>= 4) | |
5900 | if ((enable & 3) && (rwlen & 15) == type && db[i] == addr) | |
5901 | dr6 |= (1 << i); | |
5902 | return dr6; | |
5903 | } | |
5904 | ||
c8401dda | 5905 | static void kvm_vcpu_do_singlestep(struct kvm_vcpu *vcpu, int *r) |
663f4c61 PB |
5906 | { |
5907 | struct kvm_run *kvm_run = vcpu->run; | |
5908 | ||
c8401dda PB |
5909 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) { |
5910 | kvm_run->debug.arch.dr6 = DR6_BS | DR6_FIXED_1 | DR6_RTM; | |
5911 | kvm_run->debug.arch.pc = vcpu->arch.singlestep_rip; | |
5912 | kvm_run->debug.arch.exception = DB_VECTOR; | |
5913 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
5914 | *r = EMULATE_USER_EXIT; | |
5915 | } else { | |
5916 | /* | |
5917 | * "Certain debug exceptions may clear bit 0-3. The | |
5918 | * remaining contents of the DR6 register are never | |
5919 | * cleared by the processor". | |
5920 | */ | |
5921 | vcpu->arch.dr6 &= ~15; | |
5922 | vcpu->arch.dr6 |= DR6_BS | DR6_RTM; | |
5923 | kvm_queue_exception(vcpu, DB_VECTOR); | |
663f4c61 PB |
5924 | } |
5925 | } | |
5926 | ||
6affcbed KH |
5927 | int kvm_skip_emulated_instruction(struct kvm_vcpu *vcpu) |
5928 | { | |
5929 | unsigned long rflags = kvm_x86_ops->get_rflags(vcpu); | |
5930 | int r = EMULATE_DONE; | |
5931 | ||
5932 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
c8401dda PB |
5933 | |
5934 | /* | |
5935 | * rflags is the old, "raw" value of the flags. The new value has | |
5936 | * not been saved yet. | |
5937 | * | |
5938 | * This is correct even for TF set by the guest, because "the | |
5939 | * processor will not generate this exception after the instruction | |
5940 | * that sets the TF flag". | |
5941 | */ | |
5942 | if (unlikely(rflags & X86_EFLAGS_TF)) | |
5943 | kvm_vcpu_do_singlestep(vcpu, &r); | |
6affcbed KH |
5944 | return r == EMULATE_DONE; |
5945 | } | |
5946 | EXPORT_SYMBOL_GPL(kvm_skip_emulated_instruction); | |
5947 | ||
4a1e10d5 PB |
5948 | static bool kvm_vcpu_check_breakpoint(struct kvm_vcpu *vcpu, int *r) |
5949 | { | |
4a1e10d5 PB |
5950 | if (unlikely(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) && |
5951 | (vcpu->arch.guest_debug_dr7 & DR7_BP_EN_MASK)) { | |
82b32774 NA |
5952 | struct kvm_run *kvm_run = vcpu->run; |
5953 | unsigned long eip = kvm_get_linear_rip(vcpu); | |
5954 | u32 dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
4a1e10d5 PB |
5955 | vcpu->arch.guest_debug_dr7, |
5956 | vcpu->arch.eff_db); | |
5957 | ||
5958 | if (dr6 != 0) { | |
6f43ed01 | 5959 | kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1 | DR6_RTM; |
82b32774 | 5960 | kvm_run->debug.arch.pc = eip; |
4a1e10d5 PB |
5961 | kvm_run->debug.arch.exception = DB_VECTOR; |
5962 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
5963 | *r = EMULATE_USER_EXIT; | |
5964 | return true; | |
5965 | } | |
5966 | } | |
5967 | ||
4161a569 NA |
5968 | if (unlikely(vcpu->arch.dr7 & DR7_BP_EN_MASK) && |
5969 | !(kvm_get_rflags(vcpu) & X86_EFLAGS_RF)) { | |
82b32774 NA |
5970 | unsigned long eip = kvm_get_linear_rip(vcpu); |
5971 | u32 dr6 = kvm_vcpu_check_hw_bp(eip, 0, | |
4a1e10d5 PB |
5972 | vcpu->arch.dr7, |
5973 | vcpu->arch.db); | |
5974 | ||
5975 | if (dr6 != 0) { | |
5976 | vcpu->arch.dr6 &= ~15; | |
6f43ed01 | 5977 | vcpu->arch.dr6 |= dr6 | DR6_RTM; |
4a1e10d5 PB |
5978 | kvm_queue_exception(vcpu, DB_VECTOR); |
5979 | *r = EMULATE_DONE; | |
5980 | return true; | |
5981 | } | |
5982 | } | |
5983 | ||
5984 | return false; | |
5985 | } | |
5986 | ||
04789b66 LA |
5987 | static bool is_vmware_backdoor_opcode(struct x86_emulate_ctxt *ctxt) |
5988 | { | |
2d7921c4 AM |
5989 | switch (ctxt->opcode_len) { |
5990 | case 1: | |
5991 | switch (ctxt->b) { | |
5992 | case 0xe4: /* IN */ | |
5993 | case 0xe5: | |
5994 | case 0xec: | |
5995 | case 0xed: | |
5996 | case 0xe6: /* OUT */ | |
5997 | case 0xe7: | |
5998 | case 0xee: | |
5999 | case 0xef: | |
6000 | case 0x6c: /* INS */ | |
6001 | case 0x6d: | |
6002 | case 0x6e: /* OUTS */ | |
6003 | case 0x6f: | |
6004 | return true; | |
6005 | } | |
6006 | break; | |
6007 | case 2: | |
6008 | switch (ctxt->b) { | |
6009 | case 0x33: /* RDPMC */ | |
6010 | return true; | |
6011 | } | |
6012 | break; | |
04789b66 LA |
6013 | } |
6014 | ||
6015 | return false; | |
6016 | } | |
6017 | ||
51d8b661 AP |
6018 | int x86_emulate_instruction(struct kvm_vcpu *vcpu, |
6019 | unsigned long cr2, | |
dc25e89e AP |
6020 | int emulation_type, |
6021 | void *insn, | |
6022 | int insn_len) | |
bbd9b64e | 6023 | { |
95cb2295 | 6024 | int r; |
9d74191a | 6025 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
7ae441ea | 6026 | bool writeback = true; |
93c05d3e | 6027 | bool write_fault_to_spt = vcpu->arch.write_fault_to_shadow_pgtable; |
bbd9b64e | 6028 | |
93c05d3e XG |
6029 | /* |
6030 | * Clear write_fault_to_shadow_pgtable here to ensure it is | |
6031 | * never reused. | |
6032 | */ | |
6033 | vcpu->arch.write_fault_to_shadow_pgtable = false; | |
26eef70c | 6034 | kvm_clear_exception_queue(vcpu); |
8d7d8102 | 6035 | |
571008da | 6036 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
8ec4722d | 6037 | init_emulate_ctxt(vcpu); |
4a1e10d5 PB |
6038 | |
6039 | /* | |
6040 | * We will reenter on the same instruction since | |
6041 | * we do not set complete_userspace_io. This does not | |
6042 | * handle watchpoints yet, those would be handled in | |
6043 | * the emulate_ops. | |
6044 | */ | |
d391f120 VK |
6045 | if (!(emulation_type & EMULTYPE_SKIP) && |
6046 | kvm_vcpu_check_breakpoint(vcpu, &r)) | |
4a1e10d5 PB |
6047 | return r; |
6048 | ||
9d74191a TY |
6049 | ctxt->interruptibility = 0; |
6050 | ctxt->have_exception = false; | |
e0ad0b47 | 6051 | ctxt->exception.vector = -1; |
9d74191a | 6052 | ctxt->perm_ok = false; |
bbd9b64e | 6053 | |
b51e974f | 6054 | ctxt->ud = emulation_type & EMULTYPE_TRAP_UD; |
4005996e | 6055 | |
9d74191a | 6056 | r = x86_decode_insn(ctxt, insn, insn_len); |
bbd9b64e | 6057 | |
e46479f8 | 6058 | trace_kvm_emulate_insn_start(vcpu); |
f2b5756b | 6059 | ++vcpu->stat.insn_emulation; |
1d2887e2 | 6060 | if (r != EMULATION_OK) { |
4005996e AK |
6061 | if (emulation_type & EMULTYPE_TRAP_UD) |
6062 | return EMULATE_FAIL; | |
991eebf9 GN |
6063 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
6064 | emulation_type)) | |
bbd9b64e | 6065 | return EMULATE_DONE; |
6ea6e843 PB |
6066 | if (ctxt->have_exception && inject_emulated_exception(vcpu)) |
6067 | return EMULATE_DONE; | |
6d77dbfc GN |
6068 | if (emulation_type & EMULTYPE_SKIP) |
6069 | return EMULATE_FAIL; | |
e2366171 | 6070 | return handle_emulation_failure(vcpu, emulation_type); |
bbd9b64e CO |
6071 | } |
6072 | } | |
6073 | ||
04789b66 LA |
6074 | if ((emulation_type & EMULTYPE_VMWARE) && |
6075 | !is_vmware_backdoor_opcode(ctxt)) | |
6076 | return EMULATE_FAIL; | |
6077 | ||
ba8afb6b | 6078 | if (emulation_type & EMULTYPE_SKIP) { |
9dac77fa | 6079 | kvm_rip_write(vcpu, ctxt->_eip); |
bb663c7a NA |
6080 | if (ctxt->eflags & X86_EFLAGS_RF) |
6081 | kvm_set_rflags(vcpu, ctxt->eflags & ~X86_EFLAGS_RF); | |
ba8afb6b GN |
6082 | return EMULATE_DONE; |
6083 | } | |
6084 | ||
1cb3f3ae XG |
6085 | if (retry_instruction(ctxt, cr2, emulation_type)) |
6086 | return EMULATE_DONE; | |
6087 | ||
7ae441ea | 6088 | /* this is needed for vmware backdoor interface to work since it |
4d2179e1 | 6089 | changes registers values during IO operation */ |
7ae441ea GN |
6090 | if (vcpu->arch.emulate_regs_need_sync_from_vcpu) { |
6091 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; | |
dd856efa | 6092 | emulator_invalidate_register_cache(ctxt); |
7ae441ea | 6093 | } |
4d2179e1 | 6094 | |
5cd21917 | 6095 | restart: |
0f89b207 TL |
6096 | /* Save the faulting GPA (cr2) in the address field */ |
6097 | ctxt->exception.address = cr2; | |
6098 | ||
9d74191a | 6099 | r = x86_emulate_insn(ctxt); |
bbd9b64e | 6100 | |
775fde86 JR |
6101 | if (r == EMULATION_INTERCEPTED) |
6102 | return EMULATE_DONE; | |
6103 | ||
d2ddd1c4 | 6104 | if (r == EMULATION_FAILED) { |
991eebf9 GN |
6105 | if (reexecute_instruction(vcpu, cr2, write_fault_to_spt, |
6106 | emulation_type)) | |
c3cd7ffa GN |
6107 | return EMULATE_DONE; |
6108 | ||
e2366171 | 6109 | return handle_emulation_failure(vcpu, emulation_type); |
bbd9b64e CO |
6110 | } |
6111 | ||
9d74191a | 6112 | if (ctxt->have_exception) { |
d2ddd1c4 | 6113 | r = EMULATE_DONE; |
ef54bcfe PB |
6114 | if (inject_emulated_exception(vcpu)) |
6115 | return r; | |
d2ddd1c4 | 6116 | } else if (vcpu->arch.pio.count) { |
0912c977 PB |
6117 | if (!vcpu->arch.pio.in) { |
6118 | /* FIXME: return into emulator if single-stepping. */ | |
3457e419 | 6119 | vcpu->arch.pio.count = 0; |
0912c977 | 6120 | } else { |
7ae441ea | 6121 | writeback = false; |
716d51ab GN |
6122 | vcpu->arch.complete_userspace_io = complete_emulated_pio; |
6123 | } | |
ac0a48c3 | 6124 | r = EMULATE_USER_EXIT; |
7ae441ea GN |
6125 | } else if (vcpu->mmio_needed) { |
6126 | if (!vcpu->mmio_is_write) | |
6127 | writeback = false; | |
ac0a48c3 | 6128 | r = EMULATE_USER_EXIT; |
716d51ab | 6129 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; |
7ae441ea | 6130 | } else if (r == EMULATION_RESTART) |
5cd21917 | 6131 | goto restart; |
d2ddd1c4 GN |
6132 | else |
6133 | r = EMULATE_DONE; | |
f850e2e6 | 6134 | |
7ae441ea | 6135 | if (writeback) { |
6addfc42 | 6136 | unsigned long rflags = kvm_x86_ops->get_rflags(vcpu); |
9d74191a | 6137 | toggle_interruptibility(vcpu, ctxt->interruptibility); |
7ae441ea | 6138 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
9d74191a | 6139 | kvm_rip_write(vcpu, ctxt->eip); |
c8401dda PB |
6140 | if (r == EMULATE_DONE && |
6141 | (ctxt->tf || (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP))) | |
6142 | kvm_vcpu_do_singlestep(vcpu, &r); | |
38827dbd NA |
6143 | if (!ctxt->have_exception || |
6144 | exception_type(ctxt->exception.vector) == EXCPT_TRAP) | |
6145 | __kvm_set_rflags(vcpu, ctxt->eflags); | |
6addfc42 PB |
6146 | |
6147 | /* | |
6148 | * For STI, interrupts are shadowed; so KVM_REQ_EVENT will | |
6149 | * do nothing, and it will be requested again as soon as | |
6150 | * the shadow expires. But we still need to check here, | |
6151 | * because POPF has no interrupt shadow. | |
6152 | */ | |
6153 | if (unlikely((ctxt->eflags & ~rflags) & X86_EFLAGS_IF)) | |
6154 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
7ae441ea GN |
6155 | } else |
6156 | vcpu->arch.emulate_regs_need_sync_to_vcpu = true; | |
e85d28f8 GN |
6157 | |
6158 | return r; | |
de7d789a | 6159 | } |
51d8b661 | 6160 | EXPORT_SYMBOL_GPL(x86_emulate_instruction); |
de7d789a | 6161 | |
dca7f128 SC |
6162 | static int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, |
6163 | unsigned short port) | |
de7d789a | 6164 | { |
cf8f70bf | 6165 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
ca1d4a9e AK |
6166 | int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt, |
6167 | size, port, &val, 1); | |
cf8f70bf | 6168 | /* do not return to emulator after return from userspace */ |
7972995b | 6169 | vcpu->arch.pio.count = 0; |
de7d789a CO |
6170 | return ret; |
6171 | } | |
de7d789a | 6172 | |
8370c3d0 TL |
6173 | static int complete_fast_pio_in(struct kvm_vcpu *vcpu) |
6174 | { | |
6175 | unsigned long val; | |
6176 | ||
6177 | /* We should only ever be called with arch.pio.count equal to 1 */ | |
6178 | BUG_ON(vcpu->arch.pio.count != 1); | |
6179 | ||
6180 | /* For size less than 4 we merge, else we zero extend */ | |
6181 | val = (vcpu->arch.pio.size < 4) ? kvm_register_read(vcpu, VCPU_REGS_RAX) | |
6182 | : 0; | |
6183 | ||
6184 | /* | |
6185 | * Since vcpu->arch.pio.count == 1 let emulator_pio_in_emulated perform | |
6186 | * the copy and tracing | |
6187 | */ | |
6188 | emulator_pio_in_emulated(&vcpu->arch.emulate_ctxt, vcpu->arch.pio.size, | |
6189 | vcpu->arch.pio.port, &val, 1); | |
6190 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); | |
6191 | ||
6192 | return 1; | |
6193 | } | |
6194 | ||
dca7f128 SC |
6195 | static int kvm_fast_pio_in(struct kvm_vcpu *vcpu, int size, |
6196 | unsigned short port) | |
8370c3d0 TL |
6197 | { |
6198 | unsigned long val; | |
6199 | int ret; | |
6200 | ||
6201 | /* For size less than 4 we merge, else we zero extend */ | |
6202 | val = (size < 4) ? kvm_register_read(vcpu, VCPU_REGS_RAX) : 0; | |
6203 | ||
6204 | ret = emulator_pio_in_emulated(&vcpu->arch.emulate_ctxt, size, port, | |
6205 | &val, 1); | |
6206 | if (ret) { | |
6207 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); | |
6208 | return ret; | |
6209 | } | |
6210 | ||
6211 | vcpu->arch.complete_userspace_io = complete_fast_pio_in; | |
6212 | ||
6213 | return 0; | |
6214 | } | |
dca7f128 SC |
6215 | |
6216 | int kvm_fast_pio(struct kvm_vcpu *vcpu, int size, unsigned short port, int in) | |
6217 | { | |
6218 | int ret = kvm_skip_emulated_instruction(vcpu); | |
6219 | ||
6220 | /* | |
6221 | * TODO: we might be squashing a KVM_GUESTDBG_SINGLESTEP-triggered | |
6222 | * KVM_EXIT_DEBUG here. | |
6223 | */ | |
6224 | if (in) | |
6225 | return kvm_fast_pio_in(vcpu, size, port) && ret; | |
6226 | else | |
6227 | return kvm_fast_pio_out(vcpu, size, port) && ret; | |
6228 | } | |
6229 | EXPORT_SYMBOL_GPL(kvm_fast_pio); | |
8370c3d0 | 6230 | |
251a5fd6 | 6231 | static int kvmclock_cpu_down_prep(unsigned int cpu) |
8cfdc000 | 6232 | { |
0a3aee0d | 6233 | __this_cpu_write(cpu_tsc_khz, 0); |
251a5fd6 | 6234 | return 0; |
8cfdc000 ZA |
6235 | } |
6236 | ||
6237 | static void tsc_khz_changed(void *data) | |
c8076604 | 6238 | { |
8cfdc000 ZA |
6239 | struct cpufreq_freqs *freq = data; |
6240 | unsigned long khz = 0; | |
6241 | ||
6242 | if (data) | |
6243 | khz = freq->new; | |
6244 | else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) | |
6245 | khz = cpufreq_quick_get(raw_smp_processor_id()); | |
6246 | if (!khz) | |
6247 | khz = tsc_khz; | |
0a3aee0d | 6248 | __this_cpu_write(cpu_tsc_khz, khz); |
c8076604 GH |
6249 | } |
6250 | ||
5fa4ec9c | 6251 | #ifdef CONFIG_X86_64 |
0092e434 VK |
6252 | static void kvm_hyperv_tsc_notifier(void) |
6253 | { | |
0092e434 VK |
6254 | struct kvm *kvm; |
6255 | struct kvm_vcpu *vcpu; | |
6256 | int cpu; | |
6257 | ||
6258 | spin_lock(&kvm_lock); | |
6259 | list_for_each_entry(kvm, &vm_list, vm_list) | |
6260 | kvm_make_mclock_inprogress_request(kvm); | |
6261 | ||
6262 | hyperv_stop_tsc_emulation(); | |
6263 | ||
6264 | /* TSC frequency always matches when on Hyper-V */ | |
6265 | for_each_present_cpu(cpu) | |
6266 | per_cpu(cpu_tsc_khz, cpu) = tsc_khz; | |
6267 | kvm_max_guest_tsc_khz = tsc_khz; | |
6268 | ||
6269 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
6270 | struct kvm_arch *ka = &kvm->arch; | |
6271 | ||
6272 | spin_lock(&ka->pvclock_gtod_sync_lock); | |
6273 | ||
6274 | pvclock_update_vm_gtod_copy(kvm); | |
6275 | ||
6276 | kvm_for_each_vcpu(cpu, vcpu, kvm) | |
6277 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); | |
6278 | ||
6279 | kvm_for_each_vcpu(cpu, vcpu, kvm) | |
6280 | kvm_clear_request(KVM_REQ_MCLOCK_INPROGRESS, vcpu); | |
6281 | ||
6282 | spin_unlock(&ka->pvclock_gtod_sync_lock); | |
6283 | } | |
6284 | spin_unlock(&kvm_lock); | |
0092e434 | 6285 | } |
5fa4ec9c | 6286 | #endif |
0092e434 | 6287 | |
c8076604 GH |
6288 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
6289 | void *data) | |
6290 | { | |
6291 | struct cpufreq_freqs *freq = data; | |
6292 | struct kvm *kvm; | |
6293 | struct kvm_vcpu *vcpu; | |
6294 | int i, send_ipi = 0; | |
6295 | ||
8cfdc000 ZA |
6296 | /* |
6297 | * We allow guests to temporarily run on slowing clocks, | |
6298 | * provided we notify them after, or to run on accelerating | |
6299 | * clocks, provided we notify them before. Thus time never | |
6300 | * goes backwards. | |
6301 | * | |
6302 | * However, we have a problem. We can't atomically update | |
6303 | * the frequency of a given CPU from this function; it is | |
6304 | * merely a notifier, which can be called from any CPU. | |
6305 | * Changing the TSC frequency at arbitrary points in time | |
6306 | * requires a recomputation of local variables related to | |
6307 | * the TSC for each VCPU. We must flag these local variables | |
6308 | * to be updated and be sure the update takes place with the | |
6309 | * new frequency before any guests proceed. | |
6310 | * | |
6311 | * Unfortunately, the combination of hotplug CPU and frequency | |
6312 | * change creates an intractable locking scenario; the order | |
6313 | * of when these callouts happen is undefined with respect to | |
6314 | * CPU hotplug, and they can race with each other. As such, | |
6315 | * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is | |
6316 | * undefined; you can actually have a CPU frequency change take | |
6317 | * place in between the computation of X and the setting of the | |
6318 | * variable. To protect against this problem, all updates of | |
6319 | * the per_cpu tsc_khz variable are done in an interrupt | |
6320 | * protected IPI, and all callers wishing to update the value | |
6321 | * must wait for a synchronous IPI to complete (which is trivial | |
6322 | * if the caller is on the CPU already). This establishes the | |
6323 | * necessary total order on variable updates. | |
6324 | * | |
6325 | * Note that because a guest time update may take place | |
6326 | * anytime after the setting of the VCPU's request bit, the | |
6327 | * correct TSC value must be set before the request. However, | |
6328 | * to ensure the update actually makes it to any guest which | |
6329 | * starts running in hardware virtualization between the set | |
6330 | * and the acquisition of the spinlock, we must also ping the | |
6331 | * CPU after setting the request bit. | |
6332 | * | |
6333 | */ | |
6334 | ||
c8076604 GH |
6335 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
6336 | return 0; | |
6337 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
6338 | return 0; | |
8cfdc000 ZA |
6339 | |
6340 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); | |
c8076604 | 6341 | |
2f303b74 | 6342 | spin_lock(&kvm_lock); |
c8076604 | 6343 | list_for_each_entry(kvm, &vm_list, vm_list) { |
988a2cae | 6344 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
6345 | if (vcpu->cpu != freq->cpu) |
6346 | continue; | |
c285545f | 6347 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
c8076604 | 6348 | if (vcpu->cpu != smp_processor_id()) |
8cfdc000 | 6349 | send_ipi = 1; |
c8076604 GH |
6350 | } |
6351 | } | |
2f303b74 | 6352 | spin_unlock(&kvm_lock); |
c8076604 GH |
6353 | |
6354 | if (freq->old < freq->new && send_ipi) { | |
6355 | /* | |
6356 | * We upscale the frequency. Must make the guest | |
6357 | * doesn't see old kvmclock values while running with | |
6358 | * the new frequency, otherwise we risk the guest sees | |
6359 | * time go backwards. | |
6360 | * | |
6361 | * In case we update the frequency for another cpu | |
6362 | * (which might be in guest context) send an interrupt | |
6363 | * to kick the cpu out of guest context. Next time | |
6364 | * guest context is entered kvmclock will be updated, | |
6365 | * so the guest will not see stale values. | |
6366 | */ | |
8cfdc000 | 6367 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); |
c8076604 GH |
6368 | } |
6369 | return 0; | |
6370 | } | |
6371 | ||
6372 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
8cfdc000 ZA |
6373 | .notifier_call = kvmclock_cpufreq_notifier |
6374 | }; | |
6375 | ||
251a5fd6 | 6376 | static int kvmclock_cpu_online(unsigned int cpu) |
8cfdc000 | 6377 | { |
251a5fd6 SAS |
6378 | tsc_khz_changed(NULL); |
6379 | return 0; | |
8cfdc000 ZA |
6380 | } |
6381 | ||
b820cc0c ZA |
6382 | static void kvm_timer_init(void) |
6383 | { | |
c285545f | 6384 | max_tsc_khz = tsc_khz; |
460dd42e | 6385 | |
b820cc0c | 6386 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
c285545f ZA |
6387 | #ifdef CONFIG_CPU_FREQ |
6388 | struct cpufreq_policy policy; | |
758f588d BP |
6389 | int cpu; |
6390 | ||
c285545f | 6391 | memset(&policy, 0, sizeof(policy)); |
3e26f230 AK |
6392 | cpu = get_cpu(); |
6393 | cpufreq_get_policy(&policy, cpu); | |
c285545f ZA |
6394 | if (policy.cpuinfo.max_freq) |
6395 | max_tsc_khz = policy.cpuinfo.max_freq; | |
3e26f230 | 6396 | put_cpu(); |
c285545f | 6397 | #endif |
b820cc0c ZA |
6398 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
6399 | CPUFREQ_TRANSITION_NOTIFIER); | |
6400 | } | |
c285545f | 6401 | pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz); |
460dd42e | 6402 | |
73c1b41e | 6403 | cpuhp_setup_state(CPUHP_AP_X86_KVM_CLK_ONLINE, "x86/kvm/clk:online", |
251a5fd6 | 6404 | kvmclock_cpu_online, kvmclock_cpu_down_prep); |
b820cc0c ZA |
6405 | } |
6406 | ||
dd60d217 AK |
6407 | DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
6408 | EXPORT_PER_CPU_SYMBOL_GPL(current_vcpu); | |
ff9d07a0 | 6409 | |
f5132b01 | 6410 | int kvm_is_in_guest(void) |
ff9d07a0 | 6411 | { |
086c9855 | 6412 | return __this_cpu_read(current_vcpu) != NULL; |
ff9d07a0 ZY |
6413 | } |
6414 | ||
6415 | static int kvm_is_user_mode(void) | |
6416 | { | |
6417 | int user_mode = 3; | |
dcf46b94 | 6418 | |
086c9855 AS |
6419 | if (__this_cpu_read(current_vcpu)) |
6420 | user_mode = kvm_x86_ops->get_cpl(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 6421 | |
ff9d07a0 ZY |
6422 | return user_mode != 0; |
6423 | } | |
6424 | ||
6425 | static unsigned long kvm_get_guest_ip(void) | |
6426 | { | |
6427 | unsigned long ip = 0; | |
dcf46b94 | 6428 | |
086c9855 AS |
6429 | if (__this_cpu_read(current_vcpu)) |
6430 | ip = kvm_rip_read(__this_cpu_read(current_vcpu)); | |
dcf46b94 | 6431 | |
ff9d07a0 ZY |
6432 | return ip; |
6433 | } | |
6434 | ||
6435 | static struct perf_guest_info_callbacks kvm_guest_cbs = { | |
6436 | .is_in_guest = kvm_is_in_guest, | |
6437 | .is_user_mode = kvm_is_user_mode, | |
6438 | .get_guest_ip = kvm_get_guest_ip, | |
6439 | }; | |
6440 | ||
ce88decf XG |
6441 | static void kvm_set_mmio_spte_mask(void) |
6442 | { | |
6443 | u64 mask; | |
6444 | int maxphyaddr = boot_cpu_data.x86_phys_bits; | |
6445 | ||
6446 | /* | |
6447 | * Set the reserved bits and the present bit of an paging-structure | |
6448 | * entry to generate page fault with PFER.RSV = 1. | |
6449 | */ | |
885032b9 | 6450 | /* Mask the reserved physical address bits. */ |
d1431483 | 6451 | mask = rsvd_bits(maxphyaddr, 51); |
885032b9 | 6452 | |
885032b9 | 6453 | /* Set the present bit. */ |
ce88decf XG |
6454 | mask |= 1ull; |
6455 | ||
6456 | #ifdef CONFIG_X86_64 | |
6457 | /* | |
6458 | * If reserved bit is not supported, clear the present bit to disable | |
6459 | * mmio page fault. | |
6460 | */ | |
6461 | if (maxphyaddr == 52) | |
6462 | mask &= ~1ull; | |
6463 | #endif | |
6464 | ||
dcdca5fe | 6465 | kvm_mmu_set_mmio_spte_mask(mask, mask); |
ce88decf XG |
6466 | } |
6467 | ||
16e8d74d MT |
6468 | #ifdef CONFIG_X86_64 |
6469 | static void pvclock_gtod_update_fn(struct work_struct *work) | |
6470 | { | |
d828199e MT |
6471 | struct kvm *kvm; |
6472 | ||
6473 | struct kvm_vcpu *vcpu; | |
6474 | int i; | |
6475 | ||
2f303b74 | 6476 | spin_lock(&kvm_lock); |
d828199e MT |
6477 | list_for_each_entry(kvm, &vm_list, vm_list) |
6478 | kvm_for_each_vcpu(i, vcpu, kvm) | |
105b21bb | 6479 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
d828199e | 6480 | atomic_set(&kvm_guest_has_master_clock, 0); |
2f303b74 | 6481 | spin_unlock(&kvm_lock); |
16e8d74d MT |
6482 | } |
6483 | ||
6484 | static DECLARE_WORK(pvclock_gtod_work, pvclock_gtod_update_fn); | |
6485 | ||
6486 | /* | |
6487 | * Notification about pvclock gtod data update. | |
6488 | */ | |
6489 | static int pvclock_gtod_notify(struct notifier_block *nb, unsigned long unused, | |
6490 | void *priv) | |
6491 | { | |
6492 | struct pvclock_gtod_data *gtod = &pvclock_gtod_data; | |
6493 | struct timekeeper *tk = priv; | |
6494 | ||
6495 | update_pvclock_gtod(tk); | |
6496 | ||
6497 | /* disable master clock if host does not trust, or does not | |
b0c39dc6 | 6498 | * use, TSC based clocksource. |
16e8d74d | 6499 | */ |
b0c39dc6 | 6500 | if (!gtod_is_based_on_tsc(gtod->clock.vclock_mode) && |
16e8d74d MT |
6501 | atomic_read(&kvm_guest_has_master_clock) != 0) |
6502 | queue_work(system_long_wq, &pvclock_gtod_work); | |
6503 | ||
6504 | return 0; | |
6505 | } | |
6506 | ||
6507 | static struct notifier_block pvclock_gtod_notifier = { | |
6508 | .notifier_call = pvclock_gtod_notify, | |
6509 | }; | |
6510 | #endif | |
6511 | ||
f8c16bba | 6512 | int kvm_arch_init(void *opaque) |
043405e1 | 6513 | { |
b820cc0c | 6514 | int r; |
6b61edf7 | 6515 | struct kvm_x86_ops *ops = opaque; |
f8c16bba | 6516 | |
f8c16bba ZX |
6517 | if (kvm_x86_ops) { |
6518 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
6519 | r = -EEXIST; |
6520 | goto out; | |
f8c16bba ZX |
6521 | } |
6522 | ||
6523 | if (!ops->cpu_has_kvm_support()) { | |
6524 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
6525 | r = -EOPNOTSUPP; |
6526 | goto out; | |
f8c16bba ZX |
6527 | } |
6528 | if (ops->disabled_by_bios()) { | |
6529 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
6530 | r = -EOPNOTSUPP; |
6531 | goto out; | |
f8c16bba ZX |
6532 | } |
6533 | ||
013f6a5d MT |
6534 | r = -ENOMEM; |
6535 | shared_msrs = alloc_percpu(struct kvm_shared_msrs); | |
6536 | if (!shared_msrs) { | |
6537 | printk(KERN_ERR "kvm: failed to allocate percpu kvm_shared_msrs\n"); | |
6538 | goto out; | |
6539 | } | |
6540 | ||
97db56ce AK |
6541 | r = kvm_mmu_module_init(); |
6542 | if (r) | |
013f6a5d | 6543 | goto out_free_percpu; |
97db56ce | 6544 | |
ce88decf | 6545 | kvm_set_mmio_spte_mask(); |
97db56ce | 6546 | |
f8c16bba | 6547 | kvm_x86_ops = ops; |
920c8377 | 6548 | |
7b52345e | 6549 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, |
ffb128c8 | 6550 | PT_DIRTY_MASK, PT64_NX_MASK, 0, |
d0ec49d4 | 6551 | PT_PRESENT_MASK, 0, sme_me_mask); |
b820cc0c | 6552 | kvm_timer_init(); |
c8076604 | 6553 | |
ff9d07a0 ZY |
6554 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
6555 | ||
d366bf7e | 6556 | if (boot_cpu_has(X86_FEATURE_XSAVE)) |
2acf923e DC |
6557 | host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); |
6558 | ||
c5cc421b | 6559 | kvm_lapic_init(); |
16e8d74d MT |
6560 | #ifdef CONFIG_X86_64 |
6561 | pvclock_gtod_register_notifier(&pvclock_gtod_notifier); | |
0092e434 | 6562 | |
5fa4ec9c | 6563 | if (hypervisor_is_type(X86_HYPER_MS_HYPERV)) |
0092e434 | 6564 | set_hv_tscchange_cb(kvm_hyperv_tsc_notifier); |
16e8d74d MT |
6565 | #endif |
6566 | ||
f8c16bba | 6567 | return 0; |
56c6d28a | 6568 | |
013f6a5d MT |
6569 | out_free_percpu: |
6570 | free_percpu(shared_msrs); | |
56c6d28a | 6571 | out: |
56c6d28a | 6572 | return r; |
043405e1 | 6573 | } |
8776e519 | 6574 | |
f8c16bba ZX |
6575 | void kvm_arch_exit(void) |
6576 | { | |
0092e434 | 6577 | #ifdef CONFIG_X86_64 |
5fa4ec9c | 6578 | if (hypervisor_is_type(X86_HYPER_MS_HYPERV)) |
0092e434 VK |
6579 | clear_hv_tscchange_cb(); |
6580 | #endif | |
cef84c30 | 6581 | kvm_lapic_exit(); |
ff9d07a0 ZY |
6582 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
6583 | ||
888d256e JK |
6584 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
6585 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
6586 | CPUFREQ_TRANSITION_NOTIFIER); | |
251a5fd6 | 6587 | cpuhp_remove_state_nocalls(CPUHP_AP_X86_KVM_CLK_ONLINE); |
16e8d74d MT |
6588 | #ifdef CONFIG_X86_64 |
6589 | pvclock_gtod_unregister_notifier(&pvclock_gtod_notifier); | |
6590 | #endif | |
f8c16bba | 6591 | kvm_x86_ops = NULL; |
56c6d28a | 6592 | kvm_mmu_module_exit(); |
013f6a5d | 6593 | free_percpu(shared_msrs); |
56c6d28a | 6594 | } |
f8c16bba | 6595 | |
5cb56059 | 6596 | int kvm_vcpu_halt(struct kvm_vcpu *vcpu) |
8776e519 HB |
6597 | { |
6598 | ++vcpu->stat.halt_exits; | |
35754c98 | 6599 | if (lapic_in_kernel(vcpu)) { |
a4535290 | 6600 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
6601 | return 1; |
6602 | } else { | |
6603 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
6604 | return 0; | |
6605 | } | |
6606 | } | |
5cb56059 JS |
6607 | EXPORT_SYMBOL_GPL(kvm_vcpu_halt); |
6608 | ||
6609 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) | |
6610 | { | |
6affcbed KH |
6611 | int ret = kvm_skip_emulated_instruction(vcpu); |
6612 | /* | |
6613 | * TODO: we might be squashing a GUESTDBG_SINGLESTEP-triggered | |
6614 | * KVM_EXIT_DEBUG here. | |
6615 | */ | |
6616 | return kvm_vcpu_halt(vcpu) && ret; | |
5cb56059 | 6617 | } |
8776e519 HB |
6618 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); |
6619 | ||
8ef81a9a | 6620 | #ifdef CONFIG_X86_64 |
55dd00a7 MT |
6621 | static int kvm_pv_clock_pairing(struct kvm_vcpu *vcpu, gpa_t paddr, |
6622 | unsigned long clock_type) | |
6623 | { | |
6624 | struct kvm_clock_pairing clock_pairing; | |
6625 | struct timespec ts; | |
80fbd89c | 6626 | u64 cycle; |
55dd00a7 MT |
6627 | int ret; |
6628 | ||
6629 | if (clock_type != KVM_CLOCK_PAIRING_WALLCLOCK) | |
6630 | return -KVM_EOPNOTSUPP; | |
6631 | ||
6632 | if (kvm_get_walltime_and_clockread(&ts, &cycle) == false) | |
6633 | return -KVM_EOPNOTSUPP; | |
6634 | ||
6635 | clock_pairing.sec = ts.tv_sec; | |
6636 | clock_pairing.nsec = ts.tv_nsec; | |
6637 | clock_pairing.tsc = kvm_read_l1_tsc(vcpu, cycle); | |
6638 | clock_pairing.flags = 0; | |
6639 | ||
6640 | ret = 0; | |
6641 | if (kvm_write_guest(vcpu->kvm, paddr, &clock_pairing, | |
6642 | sizeof(struct kvm_clock_pairing))) | |
6643 | ret = -KVM_EFAULT; | |
6644 | ||
6645 | return ret; | |
6646 | } | |
8ef81a9a | 6647 | #endif |
55dd00a7 | 6648 | |
6aef266c SV |
6649 | /* |
6650 | * kvm_pv_kick_cpu_op: Kick a vcpu. | |
6651 | * | |
6652 | * @apicid - apicid of vcpu to be kicked. | |
6653 | */ | |
6654 | static void kvm_pv_kick_cpu_op(struct kvm *kvm, unsigned long flags, int apicid) | |
6655 | { | |
24d2166b | 6656 | struct kvm_lapic_irq lapic_irq; |
6aef266c | 6657 | |
24d2166b R |
6658 | lapic_irq.shorthand = 0; |
6659 | lapic_irq.dest_mode = 0; | |
ebd28fcb | 6660 | lapic_irq.level = 0; |
24d2166b | 6661 | lapic_irq.dest_id = apicid; |
93bbf0b8 | 6662 | lapic_irq.msi_redir_hint = false; |
6aef266c | 6663 | |
24d2166b | 6664 | lapic_irq.delivery_mode = APIC_DM_REMRD; |
795a149e | 6665 | kvm_irq_delivery_to_apic(kvm, NULL, &lapic_irq, NULL); |
6aef266c SV |
6666 | } |
6667 | ||
d62caabb AS |
6668 | void kvm_vcpu_deactivate_apicv(struct kvm_vcpu *vcpu) |
6669 | { | |
6670 | vcpu->arch.apicv_active = false; | |
6671 | kvm_x86_ops->refresh_apicv_exec_ctrl(vcpu); | |
6672 | } | |
6673 | ||
8776e519 HB |
6674 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
6675 | { | |
6676 | unsigned long nr, a0, a1, a2, a3, ret; | |
6356ee0c | 6677 | int op_64_bit; |
8776e519 | 6678 | |
6356ee0c MR |
6679 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) { |
6680 | if (!kvm_hv_hypercall(vcpu)) | |
6681 | return 0; | |
6682 | goto out; | |
6683 | } | |
55cd8e5a | 6684 | |
5fdbf976 MT |
6685 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
6686 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
6687 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
6688 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
6689 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 6690 | |
229456fc | 6691 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 6692 | |
a449c7aa NA |
6693 | op_64_bit = is_64_bit_mode(vcpu); |
6694 | if (!op_64_bit) { | |
8776e519 HB |
6695 | nr &= 0xFFFFFFFF; |
6696 | a0 &= 0xFFFFFFFF; | |
6697 | a1 &= 0xFFFFFFFF; | |
6698 | a2 &= 0xFFFFFFFF; | |
6699 | a3 &= 0xFFFFFFFF; | |
6700 | } | |
6701 | ||
07708c4a JK |
6702 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
6703 | ret = -KVM_EPERM; | |
6356ee0c | 6704 | goto out_error; |
07708c4a JK |
6705 | } |
6706 | ||
8776e519 | 6707 | switch (nr) { |
b93463aa AK |
6708 | case KVM_HC_VAPIC_POLL_IRQ: |
6709 | ret = 0; | |
6710 | break; | |
6aef266c SV |
6711 | case KVM_HC_KICK_CPU: |
6712 | kvm_pv_kick_cpu_op(vcpu->kvm, a0, a1); | |
6713 | ret = 0; | |
6714 | break; | |
8ef81a9a | 6715 | #ifdef CONFIG_X86_64 |
55dd00a7 MT |
6716 | case KVM_HC_CLOCK_PAIRING: |
6717 | ret = kvm_pv_clock_pairing(vcpu, a0, a1); | |
6718 | break; | |
8ef81a9a | 6719 | #endif |
8776e519 HB |
6720 | default: |
6721 | ret = -KVM_ENOSYS; | |
6722 | break; | |
6723 | } | |
6356ee0c | 6724 | out_error: |
a449c7aa NA |
6725 | if (!op_64_bit) |
6726 | ret = (u32)ret; | |
5fdbf976 | 6727 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
6356ee0c MR |
6728 | |
6729 | out: | |
f11c3a8d | 6730 | ++vcpu->stat.hypercalls; |
6356ee0c | 6731 | return kvm_skip_emulated_instruction(vcpu); |
8776e519 HB |
6732 | } |
6733 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
6734 | ||
b6785def | 6735 | static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) |
8776e519 | 6736 | { |
d6aa1000 | 6737 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
8776e519 | 6738 | char instruction[3]; |
5fdbf976 | 6739 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 6740 | |
8776e519 | 6741 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 6742 | |
ce2e852e DV |
6743 | return emulator_write_emulated(ctxt, rip, instruction, 3, |
6744 | &ctxt->exception); | |
8776e519 HB |
6745 | } |
6746 | ||
851ba692 | 6747 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 6748 | { |
782d422b MG |
6749 | return vcpu->run->request_interrupt_window && |
6750 | likely(!pic_in_kernel(vcpu->kvm)); | |
b6c7a5dc HB |
6751 | } |
6752 | ||
851ba692 | 6753 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 6754 | { |
851ba692 AK |
6755 | struct kvm_run *kvm_run = vcpu->run; |
6756 | ||
91586a3b | 6757 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
f077825a | 6758 | kvm_run->flags = is_smm(vcpu) ? KVM_RUN_X86_SMM : 0; |
2d3ad1f4 | 6759 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 6760 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
127a457a MG |
6761 | kvm_run->ready_for_interrupt_injection = |
6762 | pic_in_kernel(vcpu->kvm) || | |
782d422b | 6763 | kvm_vcpu_ready_for_interrupt_injection(vcpu); |
b6c7a5dc HB |
6764 | } |
6765 | ||
95ba8273 GN |
6766 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
6767 | { | |
6768 | int max_irr, tpr; | |
6769 | ||
6770 | if (!kvm_x86_ops->update_cr8_intercept) | |
6771 | return; | |
6772 | ||
bce87cce | 6773 | if (!lapic_in_kernel(vcpu)) |
88c808fd AK |
6774 | return; |
6775 | ||
d62caabb AS |
6776 | if (vcpu->arch.apicv_active) |
6777 | return; | |
6778 | ||
8db3baa2 GN |
6779 | if (!vcpu->arch.apic->vapic_addr) |
6780 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
6781 | else | |
6782 | max_irr = -1; | |
95ba8273 GN |
6783 | |
6784 | if (max_irr != -1) | |
6785 | max_irr >>= 4; | |
6786 | ||
6787 | tpr = kvm_lapic_get_cr8(vcpu); | |
6788 | ||
6789 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
6790 | } | |
6791 | ||
b6b8a145 | 6792 | static int inject_pending_event(struct kvm_vcpu *vcpu, bool req_int_win) |
95ba8273 | 6793 | { |
b6b8a145 JK |
6794 | int r; |
6795 | ||
95ba8273 | 6796 | /* try to reinject previous events if any */ |
664f8e26 | 6797 | |
1a680e35 LA |
6798 | if (vcpu->arch.exception.injected) |
6799 | kvm_x86_ops->queue_exception(vcpu); | |
664f8e26 | 6800 | /* |
a042c26f LA |
6801 | * Do not inject an NMI or interrupt if there is a pending |
6802 | * exception. Exceptions and interrupts are recognized at | |
6803 | * instruction boundaries, i.e. the start of an instruction. | |
6804 | * Trap-like exceptions, e.g. #DB, have higher priority than | |
6805 | * NMIs and interrupts, i.e. traps are recognized before an | |
6806 | * NMI/interrupt that's pending on the same instruction. | |
6807 | * Fault-like exceptions, e.g. #GP and #PF, are the lowest | |
6808 | * priority, but are only generated (pended) during instruction | |
6809 | * execution, i.e. a pending fault-like exception means the | |
6810 | * fault occurred on the *previous* instruction and must be | |
6811 | * serviced prior to recognizing any new events in order to | |
6812 | * fully complete the previous instruction. | |
664f8e26 | 6813 | */ |
1a680e35 LA |
6814 | else if (!vcpu->arch.exception.pending) { |
6815 | if (vcpu->arch.nmi_injected) | |
664f8e26 | 6816 | kvm_x86_ops->set_nmi(vcpu); |
1a680e35 | 6817 | else if (vcpu->arch.interrupt.injected) |
664f8e26 | 6818 | kvm_x86_ops->set_irq(vcpu); |
664f8e26 WL |
6819 | } |
6820 | ||
1a680e35 LA |
6821 | /* |
6822 | * Call check_nested_events() even if we reinjected a previous event | |
6823 | * in order for caller to determine if it should require immediate-exit | |
6824 | * from L2 to L1 due to pending L1 events which require exit | |
6825 | * from L2 to L1. | |
6826 | */ | |
664f8e26 WL |
6827 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { |
6828 | r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); | |
6829 | if (r != 0) | |
6830 | return r; | |
6831 | } | |
6832 | ||
6833 | /* try to inject new event if pending */ | |
b59bb7bd | 6834 | if (vcpu->arch.exception.pending) { |
5c1c85d0 AK |
6835 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
6836 | vcpu->arch.exception.has_error_code, | |
6837 | vcpu->arch.exception.error_code); | |
d6e8c854 | 6838 | |
1a680e35 | 6839 | WARN_ON_ONCE(vcpu->arch.exception.injected); |
664f8e26 WL |
6840 | vcpu->arch.exception.pending = false; |
6841 | vcpu->arch.exception.injected = true; | |
6842 | ||
d6e8c854 NA |
6843 | if (exception_type(vcpu->arch.exception.nr) == EXCPT_FAULT) |
6844 | __kvm_set_rflags(vcpu, kvm_get_rflags(vcpu) | | |
6845 | X86_EFLAGS_RF); | |
6846 | ||
6bdf0662 NA |
6847 | if (vcpu->arch.exception.nr == DB_VECTOR && |
6848 | (vcpu->arch.dr7 & DR7_GD)) { | |
6849 | vcpu->arch.dr7 &= ~DR7_GD; | |
6850 | kvm_update_dr7(vcpu); | |
6851 | } | |
6852 | ||
cfcd20e5 | 6853 | kvm_x86_ops->queue_exception(vcpu); |
1a680e35 LA |
6854 | } |
6855 | ||
6856 | /* Don't consider new event if we re-injected an event */ | |
6857 | if (kvm_event_needs_reinjection(vcpu)) | |
6858 | return 0; | |
6859 | ||
6860 | if (vcpu->arch.smi_pending && !is_smm(vcpu) && | |
6861 | kvm_x86_ops->smi_allowed(vcpu)) { | |
c43203ca | 6862 | vcpu->arch.smi_pending = false; |
52797bf9 | 6863 | ++vcpu->arch.smi_count; |
ee2cd4b7 | 6864 | enter_smm(vcpu); |
c43203ca | 6865 | } else if (vcpu->arch.nmi_pending && kvm_x86_ops->nmi_allowed(vcpu)) { |
321c5658 YS |
6866 | --vcpu->arch.nmi_pending; |
6867 | vcpu->arch.nmi_injected = true; | |
6868 | kvm_x86_ops->set_nmi(vcpu); | |
c7c9c56c | 6869 | } else if (kvm_cpu_has_injectable_intr(vcpu)) { |
9242b5b6 BD |
6870 | /* |
6871 | * Because interrupts can be injected asynchronously, we are | |
6872 | * calling check_nested_events again here to avoid a race condition. | |
6873 | * See https://lkml.org/lkml/2014/7/2/60 for discussion about this | |
6874 | * proposal and current concerns. Perhaps we should be setting | |
6875 | * KVM_REQ_EVENT only on certain events and not unconditionally? | |
6876 | */ | |
6877 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) { | |
6878 | r = kvm_x86_ops->check_nested_events(vcpu, req_int_win); | |
6879 | if (r != 0) | |
6880 | return r; | |
6881 | } | |
95ba8273 | 6882 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { |
66fd3f7f GN |
6883 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
6884 | false); | |
6885 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
6886 | } |
6887 | } | |
ee2cd4b7 | 6888 | |
b6b8a145 | 6889 | return 0; |
95ba8273 GN |
6890 | } |
6891 | ||
7460fb4a AK |
6892 | static void process_nmi(struct kvm_vcpu *vcpu) |
6893 | { | |
6894 | unsigned limit = 2; | |
6895 | ||
6896 | /* | |
6897 | * x86 is limited to one NMI running, and one NMI pending after it. | |
6898 | * If an NMI is already in progress, limit further NMIs to just one. | |
6899 | * Otherwise, allow two (and we'll inject the first one immediately). | |
6900 | */ | |
6901 | if (kvm_x86_ops->get_nmi_mask(vcpu) || vcpu->arch.nmi_injected) | |
6902 | limit = 1; | |
6903 | ||
6904 | vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0); | |
6905 | vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit); | |
6906 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
6907 | } | |
6908 | ||
ee2cd4b7 | 6909 | static u32 enter_smm_get_segment_flags(struct kvm_segment *seg) |
660a5d51 PB |
6910 | { |
6911 | u32 flags = 0; | |
6912 | flags |= seg->g << 23; | |
6913 | flags |= seg->db << 22; | |
6914 | flags |= seg->l << 21; | |
6915 | flags |= seg->avl << 20; | |
6916 | flags |= seg->present << 15; | |
6917 | flags |= seg->dpl << 13; | |
6918 | flags |= seg->s << 12; | |
6919 | flags |= seg->type << 8; | |
6920 | return flags; | |
6921 | } | |
6922 | ||
ee2cd4b7 | 6923 | static void enter_smm_save_seg_32(struct kvm_vcpu *vcpu, char *buf, int n) |
660a5d51 PB |
6924 | { |
6925 | struct kvm_segment seg; | |
6926 | int offset; | |
6927 | ||
6928 | kvm_get_segment(vcpu, &seg, n); | |
6929 | put_smstate(u32, buf, 0x7fa8 + n * 4, seg.selector); | |
6930 | ||
6931 | if (n < 3) | |
6932 | offset = 0x7f84 + n * 12; | |
6933 | else | |
6934 | offset = 0x7f2c + (n - 3) * 12; | |
6935 | ||
6936 | put_smstate(u32, buf, offset + 8, seg.base); | |
6937 | put_smstate(u32, buf, offset + 4, seg.limit); | |
ee2cd4b7 | 6938 | put_smstate(u32, buf, offset, enter_smm_get_segment_flags(&seg)); |
660a5d51 PB |
6939 | } |
6940 | ||
efbb288a | 6941 | #ifdef CONFIG_X86_64 |
ee2cd4b7 | 6942 | static void enter_smm_save_seg_64(struct kvm_vcpu *vcpu, char *buf, int n) |
660a5d51 PB |
6943 | { |
6944 | struct kvm_segment seg; | |
6945 | int offset; | |
6946 | u16 flags; | |
6947 | ||
6948 | kvm_get_segment(vcpu, &seg, n); | |
6949 | offset = 0x7e00 + n * 16; | |
6950 | ||
ee2cd4b7 | 6951 | flags = enter_smm_get_segment_flags(&seg) >> 8; |
660a5d51 PB |
6952 | put_smstate(u16, buf, offset, seg.selector); |
6953 | put_smstate(u16, buf, offset + 2, flags); | |
6954 | put_smstate(u32, buf, offset + 4, seg.limit); | |
6955 | put_smstate(u64, buf, offset + 8, seg.base); | |
6956 | } | |
efbb288a | 6957 | #endif |
660a5d51 | 6958 | |
ee2cd4b7 | 6959 | static void enter_smm_save_state_32(struct kvm_vcpu *vcpu, char *buf) |
660a5d51 PB |
6960 | { |
6961 | struct desc_ptr dt; | |
6962 | struct kvm_segment seg; | |
6963 | unsigned long val; | |
6964 | int i; | |
6965 | ||
6966 | put_smstate(u32, buf, 0x7ffc, kvm_read_cr0(vcpu)); | |
6967 | put_smstate(u32, buf, 0x7ff8, kvm_read_cr3(vcpu)); | |
6968 | put_smstate(u32, buf, 0x7ff4, kvm_get_rflags(vcpu)); | |
6969 | put_smstate(u32, buf, 0x7ff0, kvm_rip_read(vcpu)); | |
6970 | ||
6971 | for (i = 0; i < 8; i++) | |
6972 | put_smstate(u32, buf, 0x7fd0 + i * 4, kvm_register_read(vcpu, i)); | |
6973 | ||
6974 | kvm_get_dr(vcpu, 6, &val); | |
6975 | put_smstate(u32, buf, 0x7fcc, (u32)val); | |
6976 | kvm_get_dr(vcpu, 7, &val); | |
6977 | put_smstate(u32, buf, 0x7fc8, (u32)val); | |
6978 | ||
6979 | kvm_get_segment(vcpu, &seg, VCPU_SREG_TR); | |
6980 | put_smstate(u32, buf, 0x7fc4, seg.selector); | |
6981 | put_smstate(u32, buf, 0x7f64, seg.base); | |
6982 | put_smstate(u32, buf, 0x7f60, seg.limit); | |
ee2cd4b7 | 6983 | put_smstate(u32, buf, 0x7f5c, enter_smm_get_segment_flags(&seg)); |
660a5d51 PB |
6984 | |
6985 | kvm_get_segment(vcpu, &seg, VCPU_SREG_LDTR); | |
6986 | put_smstate(u32, buf, 0x7fc0, seg.selector); | |
6987 | put_smstate(u32, buf, 0x7f80, seg.base); | |
6988 | put_smstate(u32, buf, 0x7f7c, seg.limit); | |
ee2cd4b7 | 6989 | put_smstate(u32, buf, 0x7f78, enter_smm_get_segment_flags(&seg)); |
660a5d51 PB |
6990 | |
6991 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
6992 | put_smstate(u32, buf, 0x7f74, dt.address); | |
6993 | put_smstate(u32, buf, 0x7f70, dt.size); | |
6994 | ||
6995 | kvm_x86_ops->get_idt(vcpu, &dt); | |
6996 | put_smstate(u32, buf, 0x7f58, dt.address); | |
6997 | put_smstate(u32, buf, 0x7f54, dt.size); | |
6998 | ||
6999 | for (i = 0; i < 6; i++) | |
ee2cd4b7 | 7000 | enter_smm_save_seg_32(vcpu, buf, i); |
660a5d51 PB |
7001 | |
7002 | put_smstate(u32, buf, 0x7f14, kvm_read_cr4(vcpu)); | |
7003 | ||
7004 | /* revision id */ | |
7005 | put_smstate(u32, buf, 0x7efc, 0x00020000); | |
7006 | put_smstate(u32, buf, 0x7ef8, vcpu->arch.smbase); | |
7007 | } | |
7008 | ||
ee2cd4b7 | 7009 | static void enter_smm_save_state_64(struct kvm_vcpu *vcpu, char *buf) |
660a5d51 PB |
7010 | { |
7011 | #ifdef CONFIG_X86_64 | |
7012 | struct desc_ptr dt; | |
7013 | struct kvm_segment seg; | |
7014 | unsigned long val; | |
7015 | int i; | |
7016 | ||
7017 | for (i = 0; i < 16; i++) | |
7018 | put_smstate(u64, buf, 0x7ff8 - i * 8, kvm_register_read(vcpu, i)); | |
7019 | ||
7020 | put_smstate(u64, buf, 0x7f78, kvm_rip_read(vcpu)); | |
7021 | put_smstate(u32, buf, 0x7f70, kvm_get_rflags(vcpu)); | |
7022 | ||
7023 | kvm_get_dr(vcpu, 6, &val); | |
7024 | put_smstate(u64, buf, 0x7f68, val); | |
7025 | kvm_get_dr(vcpu, 7, &val); | |
7026 | put_smstate(u64, buf, 0x7f60, val); | |
7027 | ||
7028 | put_smstate(u64, buf, 0x7f58, kvm_read_cr0(vcpu)); | |
7029 | put_smstate(u64, buf, 0x7f50, kvm_read_cr3(vcpu)); | |
7030 | put_smstate(u64, buf, 0x7f48, kvm_read_cr4(vcpu)); | |
7031 | ||
7032 | put_smstate(u32, buf, 0x7f00, vcpu->arch.smbase); | |
7033 | ||
7034 | /* revision id */ | |
7035 | put_smstate(u32, buf, 0x7efc, 0x00020064); | |
7036 | ||
7037 | put_smstate(u64, buf, 0x7ed0, vcpu->arch.efer); | |
7038 | ||
7039 | kvm_get_segment(vcpu, &seg, VCPU_SREG_TR); | |
7040 | put_smstate(u16, buf, 0x7e90, seg.selector); | |
ee2cd4b7 | 7041 | put_smstate(u16, buf, 0x7e92, enter_smm_get_segment_flags(&seg) >> 8); |
660a5d51 PB |
7042 | put_smstate(u32, buf, 0x7e94, seg.limit); |
7043 | put_smstate(u64, buf, 0x7e98, seg.base); | |
7044 | ||
7045 | kvm_x86_ops->get_idt(vcpu, &dt); | |
7046 | put_smstate(u32, buf, 0x7e84, dt.size); | |
7047 | put_smstate(u64, buf, 0x7e88, dt.address); | |
7048 | ||
7049 | kvm_get_segment(vcpu, &seg, VCPU_SREG_LDTR); | |
7050 | put_smstate(u16, buf, 0x7e70, seg.selector); | |
ee2cd4b7 | 7051 | put_smstate(u16, buf, 0x7e72, enter_smm_get_segment_flags(&seg) >> 8); |
660a5d51 PB |
7052 | put_smstate(u32, buf, 0x7e74, seg.limit); |
7053 | put_smstate(u64, buf, 0x7e78, seg.base); | |
7054 | ||
7055 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
7056 | put_smstate(u32, buf, 0x7e64, dt.size); | |
7057 | put_smstate(u64, buf, 0x7e68, dt.address); | |
7058 | ||
7059 | for (i = 0; i < 6; i++) | |
ee2cd4b7 | 7060 | enter_smm_save_seg_64(vcpu, buf, i); |
660a5d51 PB |
7061 | #else |
7062 | WARN_ON_ONCE(1); | |
7063 | #endif | |
7064 | } | |
7065 | ||
ee2cd4b7 | 7066 | static void enter_smm(struct kvm_vcpu *vcpu) |
64d60670 | 7067 | { |
660a5d51 | 7068 | struct kvm_segment cs, ds; |
18c3626e | 7069 | struct desc_ptr dt; |
660a5d51 PB |
7070 | char buf[512]; |
7071 | u32 cr0; | |
7072 | ||
660a5d51 | 7073 | trace_kvm_enter_smm(vcpu->vcpu_id, vcpu->arch.smbase, true); |
660a5d51 | 7074 | memset(buf, 0, 512); |
d6321d49 | 7075 | if (guest_cpuid_has(vcpu, X86_FEATURE_LM)) |
ee2cd4b7 | 7076 | enter_smm_save_state_64(vcpu, buf); |
660a5d51 | 7077 | else |
ee2cd4b7 | 7078 | enter_smm_save_state_32(vcpu, buf); |
660a5d51 | 7079 | |
0234bf88 LP |
7080 | /* |
7081 | * Give pre_enter_smm() a chance to make ISA-specific changes to the | |
7082 | * vCPU state (e.g. leave guest mode) after we've saved the state into | |
7083 | * the SMM state-save area. | |
7084 | */ | |
7085 | kvm_x86_ops->pre_enter_smm(vcpu, buf); | |
7086 | ||
7087 | vcpu->arch.hflags |= HF_SMM_MASK; | |
54bf36aa | 7088 | kvm_vcpu_write_guest(vcpu, vcpu->arch.smbase + 0xfe00, buf, sizeof(buf)); |
660a5d51 PB |
7089 | |
7090 | if (kvm_x86_ops->get_nmi_mask(vcpu)) | |
7091 | vcpu->arch.hflags |= HF_SMM_INSIDE_NMI_MASK; | |
7092 | else | |
7093 | kvm_x86_ops->set_nmi_mask(vcpu, true); | |
7094 | ||
7095 | kvm_set_rflags(vcpu, X86_EFLAGS_FIXED); | |
7096 | kvm_rip_write(vcpu, 0x8000); | |
7097 | ||
7098 | cr0 = vcpu->arch.cr0 & ~(X86_CR0_PE | X86_CR0_EM | X86_CR0_TS | X86_CR0_PG); | |
7099 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
7100 | vcpu->arch.cr0 = cr0; | |
7101 | ||
7102 | kvm_x86_ops->set_cr4(vcpu, 0); | |
7103 | ||
18c3626e PB |
7104 | /* Undocumented: IDT limit is set to zero on entry to SMM. */ |
7105 | dt.address = dt.size = 0; | |
7106 | kvm_x86_ops->set_idt(vcpu, &dt); | |
7107 | ||
660a5d51 PB |
7108 | __kvm_set_dr(vcpu, 7, DR7_FIXED_1); |
7109 | ||
7110 | cs.selector = (vcpu->arch.smbase >> 4) & 0xffff; | |
7111 | cs.base = vcpu->arch.smbase; | |
7112 | ||
7113 | ds.selector = 0; | |
7114 | ds.base = 0; | |
7115 | ||
7116 | cs.limit = ds.limit = 0xffffffff; | |
7117 | cs.type = ds.type = 0x3; | |
7118 | cs.dpl = ds.dpl = 0; | |
7119 | cs.db = ds.db = 0; | |
7120 | cs.s = ds.s = 1; | |
7121 | cs.l = ds.l = 0; | |
7122 | cs.g = ds.g = 1; | |
7123 | cs.avl = ds.avl = 0; | |
7124 | cs.present = ds.present = 1; | |
7125 | cs.unusable = ds.unusable = 0; | |
7126 | cs.padding = ds.padding = 0; | |
7127 | ||
7128 | kvm_set_segment(vcpu, &cs, VCPU_SREG_CS); | |
7129 | kvm_set_segment(vcpu, &ds, VCPU_SREG_DS); | |
7130 | kvm_set_segment(vcpu, &ds, VCPU_SREG_ES); | |
7131 | kvm_set_segment(vcpu, &ds, VCPU_SREG_FS); | |
7132 | kvm_set_segment(vcpu, &ds, VCPU_SREG_GS); | |
7133 | kvm_set_segment(vcpu, &ds, VCPU_SREG_SS); | |
7134 | ||
d6321d49 | 7135 | if (guest_cpuid_has(vcpu, X86_FEATURE_LM)) |
660a5d51 PB |
7136 | kvm_x86_ops->set_efer(vcpu, 0); |
7137 | ||
7138 | kvm_update_cpuid(vcpu); | |
7139 | kvm_mmu_reset_context(vcpu); | |
64d60670 PB |
7140 | } |
7141 | ||
ee2cd4b7 | 7142 | static void process_smi(struct kvm_vcpu *vcpu) |
c43203ca PB |
7143 | { |
7144 | vcpu->arch.smi_pending = true; | |
7145 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
7146 | } | |
7147 | ||
2860c4b1 PB |
7148 | void kvm_make_scan_ioapic_request(struct kvm *kvm) |
7149 | { | |
7150 | kvm_make_all_cpus_request(kvm, KVM_REQ_SCAN_IOAPIC); | |
7151 | } | |
7152 | ||
3d81bc7e | 7153 | static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu) |
c7c9c56c | 7154 | { |
3d81bc7e YZ |
7155 | if (!kvm_apic_hw_enabled(vcpu->arch.apic)) |
7156 | return; | |
c7c9c56c | 7157 | |
6308630b | 7158 | bitmap_zero(vcpu->arch.ioapic_handled_vectors, 256); |
c7c9c56c | 7159 | |
b053b2ae | 7160 | if (irqchip_split(vcpu->kvm)) |
6308630b | 7161 | kvm_scan_ioapic_routes(vcpu, vcpu->arch.ioapic_handled_vectors); |
db2bdcbb | 7162 | else { |
fa59cc00 | 7163 | if (vcpu->arch.apicv_active) |
d62caabb | 7164 | kvm_x86_ops->sync_pir_to_irr(vcpu); |
6308630b | 7165 | kvm_ioapic_scan_entry(vcpu, vcpu->arch.ioapic_handled_vectors); |
db2bdcbb | 7166 | } |
e40ff1d6 LA |
7167 | |
7168 | if (is_guest_mode(vcpu)) | |
7169 | vcpu->arch.load_eoi_exitmap_pending = true; | |
7170 | else | |
7171 | kvm_make_request(KVM_REQ_LOAD_EOI_EXITMAP, vcpu); | |
7172 | } | |
7173 | ||
7174 | static void vcpu_load_eoi_exitmap(struct kvm_vcpu *vcpu) | |
7175 | { | |
7176 | u64 eoi_exit_bitmap[4]; | |
7177 | ||
7178 | if (!kvm_apic_hw_enabled(vcpu->arch.apic)) | |
7179 | return; | |
7180 | ||
5c919412 AS |
7181 | bitmap_or((ulong *)eoi_exit_bitmap, vcpu->arch.ioapic_handled_vectors, |
7182 | vcpu_to_synic(vcpu)->vec_bitmap, 256); | |
7183 | kvm_x86_ops->load_eoi_exitmap(vcpu, eoi_exit_bitmap); | |
c7c9c56c YZ |
7184 | } |
7185 | ||
b1394e74 RK |
7186 | void kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm, |
7187 | unsigned long start, unsigned long end) | |
7188 | { | |
7189 | unsigned long apic_address; | |
7190 | ||
7191 | /* | |
7192 | * The physical address of apic access page is stored in the VMCS. | |
7193 | * Update it when it becomes invalid. | |
7194 | */ | |
7195 | apic_address = gfn_to_hva(kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT); | |
7196 | if (start <= apic_address && apic_address < end) | |
7197 | kvm_make_all_cpus_request(kvm, KVM_REQ_APIC_PAGE_RELOAD); | |
7198 | } | |
7199 | ||
4256f43f TC |
7200 | void kvm_vcpu_reload_apic_access_page(struct kvm_vcpu *vcpu) |
7201 | { | |
c24ae0dc TC |
7202 | struct page *page = NULL; |
7203 | ||
35754c98 | 7204 | if (!lapic_in_kernel(vcpu)) |
f439ed27 PB |
7205 | return; |
7206 | ||
4256f43f TC |
7207 | if (!kvm_x86_ops->set_apic_access_page_addr) |
7208 | return; | |
7209 | ||
c24ae0dc | 7210 | page = gfn_to_page(vcpu->kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT); |
e8fd5e9e AA |
7211 | if (is_error_page(page)) |
7212 | return; | |
c24ae0dc TC |
7213 | kvm_x86_ops->set_apic_access_page_addr(vcpu, page_to_phys(page)); |
7214 | ||
7215 | /* | |
7216 | * Do not pin apic access page in memory, the MMU notifier | |
7217 | * will call us again if it is migrated or swapped out. | |
7218 | */ | |
7219 | put_page(page); | |
4256f43f TC |
7220 | } |
7221 | EXPORT_SYMBOL_GPL(kvm_vcpu_reload_apic_access_page); | |
7222 | ||
9357d939 | 7223 | /* |
362c698f | 7224 | * Returns 1 to let vcpu_run() continue the guest execution loop without |
9357d939 TY |
7225 | * exiting to the userspace. Otherwise, the value will be returned to the |
7226 | * userspace. | |
7227 | */ | |
851ba692 | 7228 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
7229 | { |
7230 | int r; | |
62a193ed MG |
7231 | bool req_int_win = |
7232 | dm_request_for_irq_injection(vcpu) && | |
7233 | kvm_cpu_accept_dm_intr(vcpu); | |
7234 | ||
730dca42 | 7235 | bool req_immediate_exit = false; |
b6c7a5dc | 7236 | |
2fa6e1e1 | 7237 | if (kvm_request_pending(vcpu)) { |
a8eeb04a | 7238 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) |
2e53d63a | 7239 | kvm_mmu_unload(vcpu); |
a8eeb04a | 7240 | if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu)) |
2f599714 | 7241 | __kvm_migrate_timers(vcpu); |
d828199e MT |
7242 | if (kvm_check_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu)) |
7243 | kvm_gen_update_masterclock(vcpu->kvm); | |
0061d53d MT |
7244 | if (kvm_check_request(KVM_REQ_GLOBAL_CLOCK_UPDATE, vcpu)) |
7245 | kvm_gen_kvmclock_update(vcpu); | |
34c238a1 ZA |
7246 | if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) { |
7247 | r = kvm_guest_time_update(vcpu); | |
8cfdc000 ZA |
7248 | if (unlikely(r)) |
7249 | goto out; | |
7250 | } | |
a8eeb04a | 7251 | if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu)) |
4731d4c7 | 7252 | kvm_mmu_sync_roots(vcpu); |
a8eeb04a | 7253 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) |
c2ba05cc | 7254 | kvm_vcpu_flush_tlb(vcpu, true); |
a8eeb04a | 7255 | if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) { |
851ba692 | 7256 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
7257 | r = 0; |
7258 | goto out; | |
7259 | } | |
a8eeb04a | 7260 | if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) { |
851ba692 | 7261 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
bbeac283 | 7262 | vcpu->mmio_needed = 0; |
71c4dfaf JR |
7263 | r = 0; |
7264 | goto out; | |
7265 | } | |
af585b92 GN |
7266 | if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) { |
7267 | /* Page is swapped out. Do synthetic halt */ | |
7268 | vcpu->arch.apf.halted = true; | |
7269 | r = 1; | |
7270 | goto out; | |
7271 | } | |
c9aaa895 GC |
7272 | if (kvm_check_request(KVM_REQ_STEAL_UPDATE, vcpu)) |
7273 | record_steal_time(vcpu); | |
64d60670 PB |
7274 | if (kvm_check_request(KVM_REQ_SMI, vcpu)) |
7275 | process_smi(vcpu); | |
7460fb4a AK |
7276 | if (kvm_check_request(KVM_REQ_NMI, vcpu)) |
7277 | process_nmi(vcpu); | |
f5132b01 | 7278 | if (kvm_check_request(KVM_REQ_PMU, vcpu)) |
c6702c9d | 7279 | kvm_pmu_handle_event(vcpu); |
f5132b01 | 7280 | if (kvm_check_request(KVM_REQ_PMI, vcpu)) |
c6702c9d | 7281 | kvm_pmu_deliver_pmi(vcpu); |
7543a635 SR |
7282 | if (kvm_check_request(KVM_REQ_IOAPIC_EOI_EXIT, vcpu)) { |
7283 | BUG_ON(vcpu->arch.pending_ioapic_eoi > 255); | |
7284 | if (test_bit(vcpu->arch.pending_ioapic_eoi, | |
6308630b | 7285 | vcpu->arch.ioapic_handled_vectors)) { |
7543a635 SR |
7286 | vcpu->run->exit_reason = KVM_EXIT_IOAPIC_EOI; |
7287 | vcpu->run->eoi.vector = | |
7288 | vcpu->arch.pending_ioapic_eoi; | |
7289 | r = 0; | |
7290 | goto out; | |
7291 | } | |
7292 | } | |
3d81bc7e YZ |
7293 | if (kvm_check_request(KVM_REQ_SCAN_IOAPIC, vcpu)) |
7294 | vcpu_scan_ioapic(vcpu); | |
e40ff1d6 LA |
7295 | if (kvm_check_request(KVM_REQ_LOAD_EOI_EXITMAP, vcpu)) |
7296 | vcpu_load_eoi_exitmap(vcpu); | |
4256f43f TC |
7297 | if (kvm_check_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu)) |
7298 | kvm_vcpu_reload_apic_access_page(vcpu); | |
2ce79189 AS |
7299 | if (kvm_check_request(KVM_REQ_HV_CRASH, vcpu)) { |
7300 | vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; | |
7301 | vcpu->run->system_event.type = KVM_SYSTEM_EVENT_CRASH; | |
7302 | r = 0; | |
7303 | goto out; | |
7304 | } | |
e516cebb AS |
7305 | if (kvm_check_request(KVM_REQ_HV_RESET, vcpu)) { |
7306 | vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; | |
7307 | vcpu->run->system_event.type = KVM_SYSTEM_EVENT_RESET; | |
7308 | r = 0; | |
7309 | goto out; | |
7310 | } | |
db397571 AS |
7311 | if (kvm_check_request(KVM_REQ_HV_EXIT, vcpu)) { |
7312 | vcpu->run->exit_reason = KVM_EXIT_HYPERV; | |
7313 | vcpu->run->hyperv = vcpu->arch.hyperv.exit; | |
7314 | r = 0; | |
7315 | goto out; | |
7316 | } | |
f3b138c5 AS |
7317 | |
7318 | /* | |
7319 | * KVM_REQ_HV_STIMER has to be processed after | |
7320 | * KVM_REQ_CLOCK_UPDATE, because Hyper-V SynIC timers | |
7321 | * depend on the guest clock being up-to-date | |
7322 | */ | |
1f4b34f8 AS |
7323 | if (kvm_check_request(KVM_REQ_HV_STIMER, vcpu)) |
7324 | kvm_hv_process_stimers(vcpu); | |
2f52d58c | 7325 | } |
b93463aa | 7326 | |
b463a6f7 | 7327 | if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { |
0f1e261e | 7328 | ++vcpu->stat.req_event; |
66450a21 JK |
7329 | kvm_apic_accept_events(vcpu); |
7330 | if (vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { | |
7331 | r = 1; | |
7332 | goto out; | |
7333 | } | |
7334 | ||
b6b8a145 JK |
7335 | if (inject_pending_event(vcpu, req_int_win) != 0) |
7336 | req_immediate_exit = true; | |
321c5658 | 7337 | else { |
cc3d967f | 7338 | /* Enable SMI/NMI/IRQ window open exits if needed. |
c43203ca | 7339 | * |
cc3d967f LP |
7340 | * SMIs have three cases: |
7341 | * 1) They can be nested, and then there is nothing to | |
7342 | * do here because RSM will cause a vmexit anyway. | |
7343 | * 2) There is an ISA-specific reason why SMI cannot be | |
7344 | * injected, and the moment when this changes can be | |
7345 | * intercepted. | |
7346 | * 3) Or the SMI can be pending because | |
7347 | * inject_pending_event has completed the injection | |
7348 | * of an IRQ or NMI from the previous vmexit, and | |
7349 | * then we request an immediate exit to inject the | |
7350 | * SMI. | |
c43203ca PB |
7351 | */ |
7352 | if (vcpu->arch.smi_pending && !is_smm(vcpu)) | |
cc3d967f LP |
7353 | if (!kvm_x86_ops->enable_smi_window(vcpu)) |
7354 | req_immediate_exit = true; | |
321c5658 YS |
7355 | if (vcpu->arch.nmi_pending) |
7356 | kvm_x86_ops->enable_nmi_window(vcpu); | |
7357 | if (kvm_cpu_has_injectable_intr(vcpu) || req_int_win) | |
7358 | kvm_x86_ops->enable_irq_window(vcpu); | |
664f8e26 | 7359 | WARN_ON(vcpu->arch.exception.pending); |
321c5658 | 7360 | } |
b463a6f7 AK |
7361 | |
7362 | if (kvm_lapic_enabled(vcpu)) { | |
7363 | update_cr8_intercept(vcpu); | |
7364 | kvm_lapic_sync_to_vapic(vcpu); | |
7365 | } | |
7366 | } | |
7367 | ||
d8368af8 AK |
7368 | r = kvm_mmu_reload(vcpu); |
7369 | if (unlikely(r)) { | |
d905c069 | 7370 | goto cancel_injection; |
d8368af8 AK |
7371 | } |
7372 | ||
b6c7a5dc HB |
7373 | preempt_disable(); |
7374 | ||
7375 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
b95234c8 PB |
7376 | |
7377 | /* | |
7378 | * Disable IRQs before setting IN_GUEST_MODE. Posted interrupt | |
7379 | * IPI are then delayed after guest entry, which ensures that they | |
7380 | * result in virtual interrupt delivery. | |
7381 | */ | |
7382 | local_irq_disable(); | |
6b7e2d09 XG |
7383 | vcpu->mode = IN_GUEST_MODE; |
7384 | ||
01b71917 MT |
7385 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
7386 | ||
0f127d12 | 7387 | /* |
b95234c8 | 7388 | * 1) We should set ->mode before checking ->requests. Please see |
cde9af6e | 7389 | * the comment in kvm_vcpu_exiting_guest_mode(). |
b95234c8 PB |
7390 | * |
7391 | * 2) For APICv, we should set ->mode before checking PIR.ON. This | |
7392 | * pairs with the memory barrier implicit in pi_test_and_set_on | |
7393 | * (see vmx_deliver_posted_interrupt). | |
7394 | * | |
7395 | * 3) This also orders the write to mode from any reads to the page | |
7396 | * tables done while the VCPU is running. Please see the comment | |
7397 | * in kvm_flush_remote_tlbs. | |
6b7e2d09 | 7398 | */ |
01b71917 | 7399 | smp_mb__after_srcu_read_unlock(); |
b6c7a5dc | 7400 | |
b95234c8 PB |
7401 | /* |
7402 | * This handles the case where a posted interrupt was | |
7403 | * notified with kvm_vcpu_kick. | |
7404 | */ | |
fa59cc00 LA |
7405 | if (kvm_lapic_enabled(vcpu) && vcpu->arch.apicv_active) |
7406 | kvm_x86_ops->sync_pir_to_irr(vcpu); | |
32f88400 | 7407 | |
2fa6e1e1 | 7408 | if (vcpu->mode == EXITING_GUEST_MODE || kvm_request_pending(vcpu) |
d94e1dc9 | 7409 | || need_resched() || signal_pending(current)) { |
6b7e2d09 | 7410 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 7411 | smp_wmb(); |
6c142801 AK |
7412 | local_irq_enable(); |
7413 | preempt_enable(); | |
01b71917 | 7414 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
6c142801 | 7415 | r = 1; |
d905c069 | 7416 | goto cancel_injection; |
6c142801 AK |
7417 | } |
7418 | ||
fc5b7f3b DM |
7419 | kvm_load_guest_xcr0(vcpu); |
7420 | ||
c43203ca PB |
7421 | if (req_immediate_exit) { |
7422 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
d6185f20 | 7423 | smp_send_reschedule(vcpu->cpu); |
c43203ca | 7424 | } |
d6185f20 | 7425 | |
8b89fe1f | 7426 | trace_kvm_entry(vcpu->vcpu_id); |
9c48d517 WL |
7427 | if (lapic_timer_advance_ns) |
7428 | wait_lapic_expire(vcpu); | |
6edaa530 | 7429 | guest_enter_irqoff(); |
b6c7a5dc | 7430 | |
42dbaa5a | 7431 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
7432 | set_debugreg(0, 7); |
7433 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
7434 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
7435 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
7436 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
c77fb5fe | 7437 | set_debugreg(vcpu->arch.dr6, 6); |
ae561ede | 7438 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD; |
42dbaa5a | 7439 | } |
b6c7a5dc | 7440 | |
851ba692 | 7441 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 7442 | |
c77fb5fe PB |
7443 | /* |
7444 | * Do this here before restoring debug registers on the host. And | |
7445 | * since we do this before handling the vmexit, a DR access vmexit | |
7446 | * can (a) read the correct value of the debug registers, (b) set | |
7447 | * KVM_DEBUGREG_WONT_EXIT again. | |
7448 | */ | |
7449 | if (unlikely(vcpu->arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT)) { | |
c77fb5fe PB |
7450 | WARN_ON(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP); |
7451 | kvm_x86_ops->sync_dirty_debug_regs(vcpu); | |
70e4da7a PB |
7452 | kvm_update_dr0123(vcpu); |
7453 | kvm_update_dr6(vcpu); | |
7454 | kvm_update_dr7(vcpu); | |
7455 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_RELOAD; | |
c77fb5fe PB |
7456 | } |
7457 | ||
24f1e32c FW |
7458 | /* |
7459 | * If the guest has used debug registers, at least dr7 | |
7460 | * will be disabled while returning to the host. | |
7461 | * If we don't have active breakpoints in the host, we don't | |
7462 | * care about the messed up debug address registers. But if | |
7463 | * we have some of them active, restore the old state. | |
7464 | */ | |
59d8eb53 | 7465 | if (hw_breakpoint_active()) |
24f1e32c | 7466 | hw_breakpoint_restore(); |
42dbaa5a | 7467 | |
4ba76538 | 7468 | vcpu->arch.last_guest_tsc = kvm_read_l1_tsc(vcpu, rdtsc()); |
1d5f066e | 7469 | |
6b7e2d09 | 7470 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 7471 | smp_wmb(); |
a547c6db | 7472 | |
fc5b7f3b DM |
7473 | kvm_put_guest_xcr0(vcpu); |
7474 | ||
dd60d217 | 7475 | kvm_before_interrupt(vcpu); |
a547c6db | 7476 | kvm_x86_ops->handle_external_intr(vcpu); |
dd60d217 | 7477 | kvm_after_interrupt(vcpu); |
b6c7a5dc HB |
7478 | |
7479 | ++vcpu->stat.exits; | |
7480 | ||
f2485b3e | 7481 | guest_exit_irqoff(); |
b6c7a5dc | 7482 | |
f2485b3e | 7483 | local_irq_enable(); |
b6c7a5dc HB |
7484 | preempt_enable(); |
7485 | ||
f656ce01 | 7486 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 7487 | |
b6c7a5dc HB |
7488 | /* |
7489 | * Profile KVM exit RIPs: | |
7490 | */ | |
7491 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
7492 | unsigned long rip = kvm_rip_read(vcpu); |
7493 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
7494 | } |
7495 | ||
cc578287 ZA |
7496 | if (unlikely(vcpu->arch.tsc_always_catchup)) |
7497 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); | |
298101da | 7498 | |
5cfb1d5a MT |
7499 | if (vcpu->arch.apic_attention) |
7500 | kvm_lapic_sync_from_vapic(vcpu); | |
b93463aa | 7501 | |
618232e2 | 7502 | vcpu->arch.gpa_available = false; |
851ba692 | 7503 | r = kvm_x86_ops->handle_exit(vcpu); |
d905c069 MT |
7504 | return r; |
7505 | ||
7506 | cancel_injection: | |
7507 | kvm_x86_ops->cancel_injection(vcpu); | |
ae7a2a3f MT |
7508 | if (unlikely(vcpu->arch.apic_attention)) |
7509 | kvm_lapic_sync_from_vapic(vcpu); | |
d7690175 MT |
7510 | out: |
7511 | return r; | |
7512 | } | |
b6c7a5dc | 7513 | |
362c698f PB |
7514 | static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu) |
7515 | { | |
bf9f6ac8 FW |
7516 | if (!kvm_arch_vcpu_runnable(vcpu) && |
7517 | (!kvm_x86_ops->pre_block || kvm_x86_ops->pre_block(vcpu) == 0)) { | |
9c8fd1ba PB |
7518 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
7519 | kvm_vcpu_block(vcpu); | |
7520 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); | |
bf9f6ac8 FW |
7521 | |
7522 | if (kvm_x86_ops->post_block) | |
7523 | kvm_x86_ops->post_block(vcpu); | |
7524 | ||
9c8fd1ba PB |
7525 | if (!kvm_check_request(KVM_REQ_UNHALT, vcpu)) |
7526 | return 1; | |
7527 | } | |
362c698f PB |
7528 | |
7529 | kvm_apic_accept_events(vcpu); | |
7530 | switch(vcpu->arch.mp_state) { | |
7531 | case KVM_MP_STATE_HALTED: | |
7532 | vcpu->arch.pv.pv_unhalted = false; | |
7533 | vcpu->arch.mp_state = | |
7534 | KVM_MP_STATE_RUNNABLE; | |
7535 | case KVM_MP_STATE_RUNNABLE: | |
7536 | vcpu->arch.apf.halted = false; | |
7537 | break; | |
7538 | case KVM_MP_STATE_INIT_RECEIVED: | |
7539 | break; | |
7540 | default: | |
7541 | return -EINTR; | |
7542 | break; | |
7543 | } | |
7544 | return 1; | |
7545 | } | |
09cec754 | 7546 | |
5d9bc648 PB |
7547 | static inline bool kvm_vcpu_running(struct kvm_vcpu *vcpu) |
7548 | { | |
0ad3bed6 PB |
7549 | if (is_guest_mode(vcpu) && kvm_x86_ops->check_nested_events) |
7550 | kvm_x86_ops->check_nested_events(vcpu, false); | |
7551 | ||
5d9bc648 PB |
7552 | return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
7553 | !vcpu->arch.apf.halted); | |
7554 | } | |
7555 | ||
362c698f | 7556 | static int vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
7557 | { |
7558 | int r; | |
f656ce01 | 7559 | struct kvm *kvm = vcpu->kvm; |
d7690175 | 7560 | |
f656ce01 | 7561 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 7562 | |
362c698f | 7563 | for (;;) { |
58f800d5 | 7564 | if (kvm_vcpu_running(vcpu)) { |
851ba692 | 7565 | r = vcpu_enter_guest(vcpu); |
bf9f6ac8 | 7566 | } else { |
362c698f | 7567 | r = vcpu_block(kvm, vcpu); |
bf9f6ac8 FW |
7568 | } |
7569 | ||
09cec754 GN |
7570 | if (r <= 0) |
7571 | break; | |
7572 | ||
72875d8a | 7573 | kvm_clear_request(KVM_REQ_PENDING_TIMER, vcpu); |
09cec754 GN |
7574 | if (kvm_cpu_has_pending_timer(vcpu)) |
7575 | kvm_inject_pending_timer_irqs(vcpu); | |
7576 | ||
782d422b MG |
7577 | if (dm_request_for_irq_injection(vcpu) && |
7578 | kvm_vcpu_ready_for_interrupt_injection(vcpu)) { | |
4ca7dd8c PB |
7579 | r = 0; |
7580 | vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; | |
09cec754 | 7581 | ++vcpu->stat.request_irq_exits; |
362c698f | 7582 | break; |
09cec754 | 7583 | } |
af585b92 GN |
7584 | |
7585 | kvm_check_async_pf_completion(vcpu); | |
7586 | ||
09cec754 GN |
7587 | if (signal_pending(current)) { |
7588 | r = -EINTR; | |
851ba692 | 7589 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 | 7590 | ++vcpu->stat.signal_exits; |
362c698f | 7591 | break; |
09cec754 GN |
7592 | } |
7593 | if (need_resched()) { | |
f656ce01 | 7594 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
c08ac06a | 7595 | cond_resched(); |
f656ce01 | 7596 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 7597 | } |
b6c7a5dc HB |
7598 | } |
7599 | ||
f656ce01 | 7600 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc HB |
7601 | |
7602 | return r; | |
7603 | } | |
7604 | ||
716d51ab GN |
7605 | static inline int complete_emulated_io(struct kvm_vcpu *vcpu) |
7606 | { | |
7607 | int r; | |
7608 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
7609 | r = emulate_instruction(vcpu, EMULTYPE_NO_DECODE); | |
7610 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); | |
7611 | if (r != EMULATE_DONE) | |
7612 | return 0; | |
7613 | return 1; | |
7614 | } | |
7615 | ||
7616 | static int complete_emulated_pio(struct kvm_vcpu *vcpu) | |
7617 | { | |
7618 | BUG_ON(!vcpu->arch.pio.count); | |
7619 | ||
7620 | return complete_emulated_io(vcpu); | |
7621 | } | |
7622 | ||
f78146b0 AK |
7623 | /* |
7624 | * Implements the following, as a state machine: | |
7625 | * | |
7626 | * read: | |
7627 | * for each fragment | |
87da7e66 XG |
7628 | * for each mmio piece in the fragment |
7629 | * write gpa, len | |
7630 | * exit | |
7631 | * copy data | |
f78146b0 AK |
7632 | * execute insn |
7633 | * | |
7634 | * write: | |
7635 | * for each fragment | |
87da7e66 XG |
7636 | * for each mmio piece in the fragment |
7637 | * write gpa, len | |
7638 | * copy data | |
7639 | * exit | |
f78146b0 | 7640 | */ |
716d51ab | 7641 | static int complete_emulated_mmio(struct kvm_vcpu *vcpu) |
5287f194 AK |
7642 | { |
7643 | struct kvm_run *run = vcpu->run; | |
f78146b0 | 7644 | struct kvm_mmio_fragment *frag; |
87da7e66 | 7645 | unsigned len; |
5287f194 | 7646 | |
716d51ab | 7647 | BUG_ON(!vcpu->mmio_needed); |
5287f194 | 7648 | |
716d51ab | 7649 | /* Complete previous fragment */ |
87da7e66 XG |
7650 | frag = &vcpu->mmio_fragments[vcpu->mmio_cur_fragment]; |
7651 | len = min(8u, frag->len); | |
716d51ab | 7652 | if (!vcpu->mmio_is_write) |
87da7e66 XG |
7653 | memcpy(frag->data, run->mmio.data, len); |
7654 | ||
7655 | if (frag->len <= 8) { | |
7656 | /* Switch to the next fragment. */ | |
7657 | frag++; | |
7658 | vcpu->mmio_cur_fragment++; | |
7659 | } else { | |
7660 | /* Go forward to the next mmio piece. */ | |
7661 | frag->data += len; | |
7662 | frag->gpa += len; | |
7663 | frag->len -= len; | |
7664 | } | |
7665 | ||
a08d3b3b | 7666 | if (vcpu->mmio_cur_fragment >= vcpu->mmio_nr_fragments) { |
716d51ab | 7667 | vcpu->mmio_needed = 0; |
0912c977 PB |
7668 | |
7669 | /* FIXME: return into emulator if single-stepping. */ | |
cef4dea0 | 7670 | if (vcpu->mmio_is_write) |
716d51ab GN |
7671 | return 1; |
7672 | vcpu->mmio_read_completed = 1; | |
7673 | return complete_emulated_io(vcpu); | |
7674 | } | |
87da7e66 | 7675 | |
716d51ab GN |
7676 | run->exit_reason = KVM_EXIT_MMIO; |
7677 | run->mmio.phys_addr = frag->gpa; | |
7678 | if (vcpu->mmio_is_write) | |
87da7e66 XG |
7679 | memcpy(run->mmio.data, frag->data, min(8u, frag->len)); |
7680 | run->mmio.len = min(8u, frag->len); | |
716d51ab GN |
7681 | run->mmio.is_write = vcpu->mmio_is_write; |
7682 | vcpu->arch.complete_userspace_io = complete_emulated_mmio; | |
7683 | return 0; | |
5287f194 AK |
7684 | } |
7685 | ||
b6c7a5dc HB |
7686 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
7687 | { | |
7688 | int r; | |
b6c7a5dc | 7689 | |
accb757d | 7690 | vcpu_load(vcpu); |
20b7035c | 7691 | kvm_sigset_activate(vcpu); |
5663d8f9 PX |
7692 | kvm_load_guest_fpu(vcpu); |
7693 | ||
a4535290 | 7694 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
2f173d26 JS |
7695 | if (kvm_run->immediate_exit) { |
7696 | r = -EINTR; | |
7697 | goto out; | |
7698 | } | |
b6c7a5dc | 7699 | kvm_vcpu_block(vcpu); |
66450a21 | 7700 | kvm_apic_accept_events(vcpu); |
72875d8a | 7701 | kvm_clear_request(KVM_REQ_UNHALT, vcpu); |
ac9f6dc0 | 7702 | r = -EAGAIN; |
a0595000 JS |
7703 | if (signal_pending(current)) { |
7704 | r = -EINTR; | |
7705 | vcpu->run->exit_reason = KVM_EXIT_INTR; | |
7706 | ++vcpu->stat.signal_exits; | |
7707 | } | |
ac9f6dc0 | 7708 | goto out; |
b6c7a5dc HB |
7709 | } |
7710 | ||
01643c51 KH |
7711 | if (vcpu->run->kvm_valid_regs & ~KVM_SYNC_X86_VALID_FIELDS) { |
7712 | r = -EINVAL; | |
7713 | goto out; | |
7714 | } | |
7715 | ||
7716 | if (vcpu->run->kvm_dirty_regs) { | |
7717 | r = sync_regs(vcpu); | |
7718 | if (r != 0) | |
7719 | goto out; | |
7720 | } | |
7721 | ||
b6c7a5dc | 7722 | /* re-sync apic's tpr */ |
35754c98 | 7723 | if (!lapic_in_kernel(vcpu)) { |
eea1cff9 AP |
7724 | if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) { |
7725 | r = -EINVAL; | |
7726 | goto out; | |
7727 | } | |
7728 | } | |
b6c7a5dc | 7729 | |
716d51ab GN |
7730 | if (unlikely(vcpu->arch.complete_userspace_io)) { |
7731 | int (*cui)(struct kvm_vcpu *) = vcpu->arch.complete_userspace_io; | |
7732 | vcpu->arch.complete_userspace_io = NULL; | |
7733 | r = cui(vcpu); | |
7734 | if (r <= 0) | |
5663d8f9 | 7735 | goto out; |
716d51ab GN |
7736 | } else |
7737 | WARN_ON(vcpu->arch.pio.count || vcpu->mmio_needed); | |
5287f194 | 7738 | |
460df4c1 PB |
7739 | if (kvm_run->immediate_exit) |
7740 | r = -EINTR; | |
7741 | else | |
7742 | r = vcpu_run(vcpu); | |
b6c7a5dc HB |
7743 | |
7744 | out: | |
5663d8f9 | 7745 | kvm_put_guest_fpu(vcpu); |
01643c51 KH |
7746 | if (vcpu->run->kvm_valid_regs) |
7747 | store_regs(vcpu); | |
f1d86e46 | 7748 | post_kvm_run_save(vcpu); |
20b7035c | 7749 | kvm_sigset_deactivate(vcpu); |
b6c7a5dc | 7750 | |
accb757d | 7751 | vcpu_put(vcpu); |
b6c7a5dc HB |
7752 | return r; |
7753 | } | |
7754 | ||
01643c51 | 7755 | static void __get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
b6c7a5dc | 7756 | { |
7ae441ea GN |
7757 | if (vcpu->arch.emulate_regs_need_sync_to_vcpu) { |
7758 | /* | |
7759 | * We are here if userspace calls get_regs() in the middle of | |
7760 | * instruction emulation. Registers state needs to be copied | |
4a969980 | 7761 | * back from emulation context to vcpu. Userspace shouldn't do |
7ae441ea GN |
7762 | * that usually, but some bad designed PV devices (vmware |
7763 | * backdoor interface) need this to work | |
7764 | */ | |
dd856efa | 7765 | emulator_writeback_register_cache(&vcpu->arch.emulate_ctxt); |
7ae441ea GN |
7766 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
7767 | } | |
5fdbf976 MT |
7768 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
7769 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
7770 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
7771 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
7772 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
7773 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
7774 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
7775 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 7776 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
7777 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
7778 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
7779 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
7780 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
7781 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
7782 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
7783 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
7784 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
7785 | #endif |
7786 | ||
5fdbf976 | 7787 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 7788 | regs->rflags = kvm_get_rflags(vcpu); |
01643c51 | 7789 | } |
b6c7a5dc | 7790 | |
01643c51 KH |
7791 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
7792 | { | |
7793 | vcpu_load(vcpu); | |
7794 | __get_regs(vcpu, regs); | |
1fc9b76b | 7795 | vcpu_put(vcpu); |
b6c7a5dc HB |
7796 | return 0; |
7797 | } | |
7798 | ||
01643c51 | 7799 | static void __set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
b6c7a5dc | 7800 | { |
7ae441ea GN |
7801 | vcpu->arch.emulate_regs_need_sync_from_vcpu = true; |
7802 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; | |
7803 | ||
5fdbf976 MT |
7804 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
7805 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
7806 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
7807 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
7808 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
7809 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
7810 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
7811 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 7812 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
7813 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
7814 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
7815 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
7816 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
7817 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
7818 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
7819 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
7820 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
7821 | #endif |
7822 | ||
5fdbf976 | 7823 | kvm_rip_write(vcpu, regs->rip); |
d73235d1 | 7824 | kvm_set_rflags(vcpu, regs->rflags | X86_EFLAGS_FIXED); |
b6c7a5dc | 7825 | |
b4f14abd JK |
7826 | vcpu->arch.exception.pending = false; |
7827 | ||
3842d135 | 7828 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
01643c51 | 7829 | } |
3842d135 | 7830 | |
01643c51 KH |
7831 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
7832 | { | |
7833 | vcpu_load(vcpu); | |
7834 | __set_regs(vcpu, regs); | |
875656fe | 7835 | vcpu_put(vcpu); |
b6c7a5dc HB |
7836 | return 0; |
7837 | } | |
7838 | ||
b6c7a5dc HB |
7839 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
7840 | { | |
7841 | struct kvm_segment cs; | |
7842 | ||
3e6e0aab | 7843 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
7844 | *db = cs.db; |
7845 | *l = cs.l; | |
7846 | } | |
7847 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
7848 | ||
01643c51 | 7849 | static void __get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) |
b6c7a5dc | 7850 | { |
89a27f4d | 7851 | struct desc_ptr dt; |
b6c7a5dc | 7852 | |
3e6e0aab GT |
7853 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
7854 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
7855 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
7856 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
7857 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
7858 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 7859 | |
3e6e0aab GT |
7860 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
7861 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
7862 | |
7863 | kvm_x86_ops->get_idt(vcpu, &dt); | |
89a27f4d GN |
7864 | sregs->idt.limit = dt.size; |
7865 | sregs->idt.base = dt.address; | |
b6c7a5dc | 7866 | kvm_x86_ops->get_gdt(vcpu, &dt); |
89a27f4d GN |
7867 | sregs->gdt.limit = dt.size; |
7868 | sregs->gdt.base = dt.address; | |
b6c7a5dc | 7869 | |
4d4ec087 | 7870 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c | 7871 | sregs->cr2 = vcpu->arch.cr2; |
9f8fe504 | 7872 | sregs->cr3 = kvm_read_cr3(vcpu); |
fc78f519 | 7873 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 7874 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 7875 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
7876 | sregs->apic_base = kvm_get_apic_base(vcpu); |
7877 | ||
923c61bb | 7878 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 7879 | |
04140b41 | 7880 | if (vcpu->arch.interrupt.injected && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
7881 | set_bit(vcpu->arch.interrupt.nr, |
7882 | (unsigned long *)sregs->interrupt_bitmap); | |
01643c51 | 7883 | } |
16d7a191 | 7884 | |
01643c51 KH |
7885 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
7886 | struct kvm_sregs *sregs) | |
7887 | { | |
7888 | vcpu_load(vcpu); | |
7889 | __get_sregs(vcpu, sregs); | |
bcdec41c | 7890 | vcpu_put(vcpu); |
b6c7a5dc HB |
7891 | return 0; |
7892 | } | |
7893 | ||
62d9f0db MT |
7894 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
7895 | struct kvm_mp_state *mp_state) | |
7896 | { | |
fd232561 CD |
7897 | vcpu_load(vcpu); |
7898 | ||
66450a21 | 7899 | kvm_apic_accept_events(vcpu); |
6aef266c SV |
7900 | if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED && |
7901 | vcpu->arch.pv.pv_unhalted) | |
7902 | mp_state->mp_state = KVM_MP_STATE_RUNNABLE; | |
7903 | else | |
7904 | mp_state->mp_state = vcpu->arch.mp_state; | |
7905 | ||
fd232561 | 7906 | vcpu_put(vcpu); |
62d9f0db MT |
7907 | return 0; |
7908 | } | |
7909 | ||
7910 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
7911 | struct kvm_mp_state *mp_state) | |
7912 | { | |
e83dff5e CD |
7913 | int ret = -EINVAL; |
7914 | ||
7915 | vcpu_load(vcpu); | |
7916 | ||
bce87cce | 7917 | if (!lapic_in_kernel(vcpu) && |
66450a21 | 7918 | mp_state->mp_state != KVM_MP_STATE_RUNNABLE) |
e83dff5e | 7919 | goto out; |
66450a21 | 7920 | |
28bf2888 DH |
7921 | /* INITs are latched while in SMM */ |
7922 | if ((is_smm(vcpu) || vcpu->arch.smi_pending) && | |
7923 | (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED || | |
7924 | mp_state->mp_state == KVM_MP_STATE_INIT_RECEIVED)) | |
e83dff5e | 7925 | goto out; |
28bf2888 | 7926 | |
66450a21 JK |
7927 | if (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED) { |
7928 | vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; | |
7929 | set_bit(KVM_APIC_SIPI, &vcpu->arch.apic->pending_events); | |
7930 | } else | |
7931 | vcpu->arch.mp_state = mp_state->mp_state; | |
3842d135 | 7932 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
e83dff5e CD |
7933 | |
7934 | ret = 0; | |
7935 | out: | |
7936 | vcpu_put(vcpu); | |
7937 | return ret; | |
62d9f0db MT |
7938 | } |
7939 | ||
7f3d35fd KW |
7940 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, |
7941 | int reason, bool has_error_code, u32 error_code) | |
b6c7a5dc | 7942 | { |
9d74191a | 7943 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d | 7944 | int ret; |
e01c2426 | 7945 | |
8ec4722d | 7946 | init_emulate_ctxt(vcpu); |
c697518a | 7947 | |
7f3d35fd | 7948 | ret = emulator_task_switch(ctxt, tss_selector, idt_index, reason, |
9d74191a | 7949 | has_error_code, error_code); |
c697518a | 7950 | |
c697518a | 7951 | if (ret) |
19d04437 | 7952 | return EMULATE_FAIL; |
37817f29 | 7953 | |
9d74191a TY |
7954 | kvm_rip_write(vcpu, ctxt->eip); |
7955 | kvm_set_rflags(vcpu, ctxt->eflags); | |
3842d135 | 7956 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
19d04437 | 7957 | return EMULATE_DONE; |
37817f29 IE |
7958 | } |
7959 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
7960 | ||
3140c156 | 7961 | static int kvm_valid_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) |
f2981033 | 7962 | { |
37b95951 | 7963 | if ((sregs->efer & EFER_LME) && (sregs->cr0 & X86_CR0_PG)) { |
f2981033 LT |
7964 | /* |
7965 | * When EFER.LME and CR0.PG are set, the processor is in | |
7966 | * 64-bit mode (though maybe in a 32-bit code segment). | |
7967 | * CR4.PAE and EFER.LMA must be set. | |
7968 | */ | |
37b95951 | 7969 | if (!(sregs->cr4 & X86_CR4_PAE) |
f2981033 LT |
7970 | || !(sregs->efer & EFER_LMA)) |
7971 | return -EINVAL; | |
7972 | } else { | |
7973 | /* | |
7974 | * Not in 64-bit mode: EFER.LMA is clear and the code | |
7975 | * segment cannot be 64-bit. | |
7976 | */ | |
7977 | if (sregs->efer & EFER_LMA || sregs->cs.l) | |
7978 | return -EINVAL; | |
7979 | } | |
7980 | ||
7981 | return 0; | |
7982 | } | |
7983 | ||
01643c51 | 7984 | static int __set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) |
b6c7a5dc | 7985 | { |
58cb628d | 7986 | struct msr_data apic_base_msr; |
b6c7a5dc | 7987 | int mmu_reset_needed = 0; |
63f42e02 | 7988 | int pending_vec, max_bits, idx; |
89a27f4d | 7989 | struct desc_ptr dt; |
b4ef9d4e CD |
7990 | int ret = -EINVAL; |
7991 | ||
d6321d49 RK |
7992 | if (!guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) && |
7993 | (sregs->cr4 & X86_CR4_OSXSAVE)) | |
b4ef9d4e | 7994 | goto out; |
6d1068b3 | 7995 | |
f2981033 | 7996 | if (kvm_valid_sregs(vcpu, sregs)) |
8dbfb2bf | 7997 | goto out; |
f2981033 | 7998 | |
d3802286 JM |
7999 | apic_base_msr.data = sregs->apic_base; |
8000 | apic_base_msr.host_initiated = true; | |
8001 | if (kvm_set_apic_base(vcpu, &apic_base_msr)) | |
b4ef9d4e | 8002 | goto out; |
6d1068b3 | 8003 | |
89a27f4d GN |
8004 | dt.size = sregs->idt.limit; |
8005 | dt.address = sregs->idt.base; | |
b6c7a5dc | 8006 | kvm_x86_ops->set_idt(vcpu, &dt); |
89a27f4d GN |
8007 | dt.size = sregs->gdt.limit; |
8008 | dt.address = sregs->gdt.base; | |
b6c7a5dc HB |
8009 | kvm_x86_ops->set_gdt(vcpu, &dt); |
8010 | ||
ad312c7c | 8011 | vcpu->arch.cr2 = sregs->cr2; |
9f8fe504 | 8012 | mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3; |
dc7e795e | 8013 | vcpu->arch.cr3 = sregs->cr3; |
aff48baa | 8014 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
b6c7a5dc | 8015 | |
2d3ad1f4 | 8016 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 8017 | |
f6801dff | 8018 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 8019 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc | 8020 | |
4d4ec087 | 8021 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 8022 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 8023 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 8024 | |
fc78f519 | 8025 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 8026 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
b9baba86 | 8027 | if (sregs->cr4 & (X86_CR4_OSXSAVE | X86_CR4_PKE)) |
00b27a3e | 8028 | kvm_update_cpuid(vcpu); |
63f42e02 XG |
8029 | |
8030 | idx = srcu_read_lock(&vcpu->kvm->srcu); | |
7c93be44 | 8031 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
9f8fe504 | 8032 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); |
7c93be44 MT |
8033 | mmu_reset_needed = 1; |
8034 | } | |
63f42e02 | 8035 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b6c7a5dc HB |
8036 | |
8037 | if (mmu_reset_needed) | |
8038 | kvm_mmu_reset_context(vcpu); | |
8039 | ||
a50abc3b | 8040 | max_bits = KVM_NR_INTERRUPTS; |
923c61bb GN |
8041 | pending_vec = find_first_bit( |
8042 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
8043 | if (pending_vec < max_bits) { | |
66fd3f7f | 8044 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb | 8045 | pr_debug("Set back pending irq %d\n", pending_vec); |
b6c7a5dc HB |
8046 | } |
8047 | ||
3e6e0aab GT |
8048 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
8049 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
8050 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
8051 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
8052 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
8053 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 8054 | |
3e6e0aab GT |
8055 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
8056 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 8057 | |
5f0269f5 ME |
8058 | update_cr8_intercept(vcpu); |
8059 | ||
9c3e4aab | 8060 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 8061 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 8062 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 8063 | !is_protmode(vcpu)) |
9c3e4aab MT |
8064 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
8065 | ||
3842d135 AK |
8066 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
8067 | ||
b4ef9d4e CD |
8068 | ret = 0; |
8069 | out: | |
01643c51 KH |
8070 | return ret; |
8071 | } | |
8072 | ||
8073 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
8074 | struct kvm_sregs *sregs) | |
8075 | { | |
8076 | int ret; | |
8077 | ||
8078 | vcpu_load(vcpu); | |
8079 | ret = __set_sregs(vcpu, sregs); | |
b4ef9d4e CD |
8080 | vcpu_put(vcpu); |
8081 | return ret; | |
b6c7a5dc HB |
8082 | } |
8083 | ||
d0bfb940 JK |
8084 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
8085 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 8086 | { |
355be0b9 | 8087 | unsigned long rflags; |
ae675ef0 | 8088 | int i, r; |
b6c7a5dc | 8089 | |
66b56562 CD |
8090 | vcpu_load(vcpu); |
8091 | ||
4f926bf2 JK |
8092 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
8093 | r = -EBUSY; | |
8094 | if (vcpu->arch.exception.pending) | |
2122ff5e | 8095 | goto out; |
4f926bf2 JK |
8096 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
8097 | kvm_queue_exception(vcpu, DB_VECTOR); | |
8098 | else | |
8099 | kvm_queue_exception(vcpu, BP_VECTOR); | |
8100 | } | |
8101 | ||
91586a3b JK |
8102 | /* |
8103 | * Read rflags as long as potentially injected trace flags are still | |
8104 | * filtered out. | |
8105 | */ | |
8106 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
8107 | |
8108 | vcpu->guest_debug = dbg->control; | |
8109 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
8110 | vcpu->guest_debug = 0; | |
8111 | ||
8112 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
8113 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
8114 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
c8639010 | 8115 | vcpu->arch.guest_debug_dr7 = dbg->arch.debugreg[7]; |
ae675ef0 JK |
8116 | } else { |
8117 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
8118 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
ae675ef0 | 8119 | } |
c8639010 | 8120 | kvm_update_dr7(vcpu); |
ae675ef0 | 8121 | |
f92653ee JK |
8122 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
8123 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + | |
8124 | get_segment_base(vcpu, VCPU_SREG_CS); | |
94fe45da | 8125 | |
91586a3b JK |
8126 | /* |
8127 | * Trigger an rflags update that will inject or remove the trace | |
8128 | * flags. | |
8129 | */ | |
8130 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 8131 | |
a96036b8 | 8132 | kvm_x86_ops->update_bp_intercept(vcpu); |
b6c7a5dc | 8133 | |
4f926bf2 | 8134 | r = 0; |
d0bfb940 | 8135 | |
2122ff5e | 8136 | out: |
66b56562 | 8137 | vcpu_put(vcpu); |
b6c7a5dc HB |
8138 | return r; |
8139 | } | |
8140 | ||
8b006791 ZX |
8141 | /* |
8142 | * Translate a guest virtual address to a guest physical address. | |
8143 | */ | |
8144 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
8145 | struct kvm_translation *tr) | |
8146 | { | |
8147 | unsigned long vaddr = tr->linear_address; | |
8148 | gpa_t gpa; | |
f656ce01 | 8149 | int idx; |
8b006791 | 8150 | |
1da5b61d CD |
8151 | vcpu_load(vcpu); |
8152 | ||
f656ce01 | 8153 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 8154 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 8155 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
8156 | tr->physical_address = gpa; |
8157 | tr->valid = gpa != UNMAPPED_GVA; | |
8158 | tr->writeable = 1; | |
8159 | tr->usermode = 0; | |
8b006791 | 8160 | |
1da5b61d | 8161 | vcpu_put(vcpu); |
8b006791 ZX |
8162 | return 0; |
8163 | } | |
8164 | ||
d0752060 HB |
8165 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
8166 | { | |
1393123e | 8167 | struct fxregs_state *fxsave; |
d0752060 | 8168 | |
1393123e | 8169 | vcpu_load(vcpu); |
d0752060 | 8170 | |
1393123e | 8171 | fxsave = &vcpu->arch.guest_fpu.state.fxsave; |
d0752060 HB |
8172 | memcpy(fpu->fpr, fxsave->st_space, 128); |
8173 | fpu->fcw = fxsave->cwd; | |
8174 | fpu->fsw = fxsave->swd; | |
8175 | fpu->ftwx = fxsave->twd; | |
8176 | fpu->last_opcode = fxsave->fop; | |
8177 | fpu->last_ip = fxsave->rip; | |
8178 | fpu->last_dp = fxsave->rdp; | |
8179 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
8180 | ||
1393123e | 8181 | vcpu_put(vcpu); |
d0752060 HB |
8182 | return 0; |
8183 | } | |
8184 | ||
8185 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
8186 | { | |
6a96bc7f CD |
8187 | struct fxregs_state *fxsave; |
8188 | ||
8189 | vcpu_load(vcpu); | |
8190 | ||
8191 | fxsave = &vcpu->arch.guest_fpu.state.fxsave; | |
d0752060 | 8192 | |
d0752060 HB |
8193 | memcpy(fxsave->st_space, fpu->fpr, 128); |
8194 | fxsave->cwd = fpu->fcw; | |
8195 | fxsave->swd = fpu->fsw; | |
8196 | fxsave->twd = fpu->ftwx; | |
8197 | fxsave->fop = fpu->last_opcode; | |
8198 | fxsave->rip = fpu->last_ip; | |
8199 | fxsave->rdp = fpu->last_dp; | |
8200 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
8201 | ||
6a96bc7f | 8202 | vcpu_put(vcpu); |
d0752060 HB |
8203 | return 0; |
8204 | } | |
8205 | ||
01643c51 KH |
8206 | static void store_regs(struct kvm_vcpu *vcpu) |
8207 | { | |
8208 | BUILD_BUG_ON(sizeof(struct kvm_sync_regs) > SYNC_REGS_SIZE_BYTES); | |
8209 | ||
8210 | if (vcpu->run->kvm_valid_regs & KVM_SYNC_X86_REGS) | |
8211 | __get_regs(vcpu, &vcpu->run->s.regs.regs); | |
8212 | ||
8213 | if (vcpu->run->kvm_valid_regs & KVM_SYNC_X86_SREGS) | |
8214 | __get_sregs(vcpu, &vcpu->run->s.regs.sregs); | |
8215 | ||
8216 | if (vcpu->run->kvm_valid_regs & KVM_SYNC_X86_EVENTS) | |
8217 | kvm_vcpu_ioctl_x86_get_vcpu_events( | |
8218 | vcpu, &vcpu->run->s.regs.events); | |
8219 | } | |
8220 | ||
8221 | static int sync_regs(struct kvm_vcpu *vcpu) | |
8222 | { | |
8223 | if (vcpu->run->kvm_dirty_regs & ~KVM_SYNC_X86_VALID_FIELDS) | |
8224 | return -EINVAL; | |
8225 | ||
8226 | if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_REGS) { | |
8227 | __set_regs(vcpu, &vcpu->run->s.regs.regs); | |
8228 | vcpu->run->kvm_dirty_regs &= ~KVM_SYNC_X86_REGS; | |
8229 | } | |
8230 | if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_SREGS) { | |
8231 | if (__set_sregs(vcpu, &vcpu->run->s.regs.sregs)) | |
8232 | return -EINVAL; | |
8233 | vcpu->run->kvm_dirty_regs &= ~KVM_SYNC_X86_SREGS; | |
8234 | } | |
8235 | if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_EVENTS) { | |
8236 | if (kvm_vcpu_ioctl_x86_set_vcpu_events( | |
8237 | vcpu, &vcpu->run->s.regs.events)) | |
8238 | return -EINVAL; | |
8239 | vcpu->run->kvm_dirty_regs &= ~KVM_SYNC_X86_EVENTS; | |
8240 | } | |
8241 | ||
8242 | return 0; | |
8243 | } | |
8244 | ||
0ee6a517 | 8245 | static void fx_init(struct kvm_vcpu *vcpu) |
d0752060 | 8246 | { |
bf935b0b | 8247 | fpstate_init(&vcpu->arch.guest_fpu.state); |
782511b0 | 8248 | if (boot_cpu_has(X86_FEATURE_XSAVES)) |
7366ed77 | 8249 | vcpu->arch.guest_fpu.state.xsave.header.xcomp_bv = |
df1daba7 | 8250 | host_xcr0 | XSTATE_COMPACTION_ENABLED; |
d0752060 | 8251 | |
2acf923e DC |
8252 | /* |
8253 | * Ensure guest xcr0 is valid for loading | |
8254 | */ | |
d91cab78 | 8255 | vcpu->arch.xcr0 = XFEATURE_MASK_FP; |
2acf923e | 8256 | |
ad312c7c | 8257 | vcpu->arch.cr0 |= X86_CR0_ET; |
d0752060 | 8258 | } |
d0752060 | 8259 | |
f775b13e | 8260 | /* Swap (qemu) user FPU context for the guest FPU context. */ |
d0752060 HB |
8261 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
8262 | { | |
f775b13e RR |
8263 | preempt_disable(); |
8264 | copy_fpregs_to_fpstate(&vcpu->arch.user_fpu); | |
38cfd5e3 PB |
8265 | /* PKRU is separately restored in kvm_x86_ops->run. */ |
8266 | __copy_kernel_to_fpregs(&vcpu->arch.guest_fpu.state, | |
8267 | ~XFEATURE_MASK_PKRU); | |
f775b13e | 8268 | preempt_enable(); |
0c04851c | 8269 | trace_kvm_fpu(1); |
d0752060 | 8270 | } |
d0752060 | 8271 | |
f775b13e | 8272 | /* When vcpu_run ends, restore user space FPU context. */ |
d0752060 HB |
8273 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) |
8274 | { | |
f775b13e | 8275 | preempt_disable(); |
4f836347 | 8276 | copy_fpregs_to_fpstate(&vcpu->arch.guest_fpu); |
f775b13e RR |
8277 | copy_kernel_to_fpregs(&vcpu->arch.user_fpu.state); |
8278 | preempt_enable(); | |
f096ed85 | 8279 | ++vcpu->stat.fpu_reload; |
0c04851c | 8280 | trace_kvm_fpu(0); |
d0752060 | 8281 | } |
e9b11c17 ZX |
8282 | |
8283 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
8284 | { | |
bd768e14 IY |
8285 | void *wbinvd_dirty_mask = vcpu->arch.wbinvd_dirty_mask; |
8286 | ||
12f9a48f | 8287 | kvmclock_reset(vcpu); |
7f1ea208 | 8288 | |
e9b11c17 | 8289 | kvm_x86_ops->vcpu_free(vcpu); |
bd768e14 | 8290 | free_cpumask_var(wbinvd_dirty_mask); |
e9b11c17 ZX |
8291 | } |
8292 | ||
8293 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
8294 | unsigned int id) | |
8295 | { | |
c447e76b LL |
8296 | struct kvm_vcpu *vcpu; |
8297 | ||
b0c39dc6 | 8298 | if (kvm_check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0) |
6755bae8 ZA |
8299 | printk_once(KERN_WARNING |
8300 | "kvm: SMP vm created on host with unstable TSC; " | |
8301 | "guest TSC will not be reliable\n"); | |
c447e76b LL |
8302 | |
8303 | vcpu = kvm_x86_ops->vcpu_create(kvm, id); | |
8304 | ||
c447e76b | 8305 | return vcpu; |
26e5215f | 8306 | } |
e9b11c17 | 8307 | |
26e5215f AK |
8308 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
8309 | { | |
19efffa2 | 8310 | kvm_vcpu_mtrr_init(vcpu); |
ec7660cc | 8311 | vcpu_load(vcpu); |
d28bc9dd | 8312 | kvm_vcpu_reset(vcpu, false); |
8a3c1a33 | 8313 | kvm_mmu_setup(vcpu); |
e9b11c17 | 8314 | vcpu_put(vcpu); |
ec7660cc | 8315 | return 0; |
e9b11c17 ZX |
8316 | } |
8317 | ||
31928aa5 | 8318 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 8319 | { |
8fe8ab46 | 8320 | struct msr_data msr; |
332967a3 | 8321 | struct kvm *kvm = vcpu->kvm; |
42897d86 | 8322 | |
d3457c87 RK |
8323 | kvm_hv_vcpu_postcreate(vcpu); |
8324 | ||
ec7660cc | 8325 | if (mutex_lock_killable(&vcpu->mutex)) |
31928aa5 | 8326 | return; |
ec7660cc | 8327 | vcpu_load(vcpu); |
8fe8ab46 WA |
8328 | msr.data = 0x0; |
8329 | msr.index = MSR_IA32_TSC; | |
8330 | msr.host_initiated = true; | |
8331 | kvm_write_tsc(vcpu, &msr); | |
42897d86 | 8332 | vcpu_put(vcpu); |
ec7660cc | 8333 | mutex_unlock(&vcpu->mutex); |
42897d86 | 8334 | |
630994b3 MT |
8335 | if (!kvmclock_periodic_sync) |
8336 | return; | |
8337 | ||
332967a3 AJ |
8338 | schedule_delayed_work(&kvm->arch.kvmclock_sync_work, |
8339 | KVMCLOCK_SYNC_PERIOD); | |
42897d86 MT |
8340 | } |
8341 | ||
d40ccc62 | 8342 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 | 8343 | { |
344d9588 GN |
8344 | vcpu->arch.apf.msr_val = 0; |
8345 | ||
ec7660cc | 8346 | vcpu_load(vcpu); |
e9b11c17 ZX |
8347 | kvm_mmu_unload(vcpu); |
8348 | vcpu_put(vcpu); | |
8349 | ||
8350 | kvm_x86_ops->vcpu_free(vcpu); | |
8351 | } | |
8352 | ||
d28bc9dd | 8353 | void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) |
e9b11c17 | 8354 | { |
b7e31be3 RK |
8355 | kvm_lapic_reset(vcpu, init_event); |
8356 | ||
e69fab5d PB |
8357 | vcpu->arch.hflags = 0; |
8358 | ||
c43203ca | 8359 | vcpu->arch.smi_pending = 0; |
52797bf9 | 8360 | vcpu->arch.smi_count = 0; |
7460fb4a AK |
8361 | atomic_set(&vcpu->arch.nmi_queued, 0); |
8362 | vcpu->arch.nmi_pending = 0; | |
448fa4a9 | 8363 | vcpu->arch.nmi_injected = false; |
5f7552d4 NA |
8364 | kvm_clear_interrupt_queue(vcpu); |
8365 | kvm_clear_exception_queue(vcpu); | |
664f8e26 | 8366 | vcpu->arch.exception.pending = false; |
448fa4a9 | 8367 | |
42dbaa5a | 8368 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); |
ae561ede | 8369 | kvm_update_dr0123(vcpu); |
6f43ed01 | 8370 | vcpu->arch.dr6 = DR6_INIT; |
73aaf249 | 8371 | kvm_update_dr6(vcpu); |
42dbaa5a | 8372 | vcpu->arch.dr7 = DR7_FIXED_1; |
c8639010 | 8373 | kvm_update_dr7(vcpu); |
42dbaa5a | 8374 | |
1119022c NA |
8375 | vcpu->arch.cr2 = 0; |
8376 | ||
3842d135 | 8377 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
344d9588 | 8378 | vcpu->arch.apf.msr_val = 0; |
c9aaa895 | 8379 | vcpu->arch.st.msr_val = 0; |
3842d135 | 8380 | |
12f9a48f GC |
8381 | kvmclock_reset(vcpu); |
8382 | ||
af585b92 GN |
8383 | kvm_clear_async_pf_completion_queue(vcpu); |
8384 | kvm_async_pf_hash_reset(vcpu); | |
8385 | vcpu->arch.apf.halted = false; | |
3842d135 | 8386 | |
a554d207 WL |
8387 | if (kvm_mpx_supported()) { |
8388 | void *mpx_state_buffer; | |
8389 | ||
8390 | /* | |
8391 | * To avoid have the INIT path from kvm_apic_has_events() that be | |
8392 | * called with loaded FPU and does not let userspace fix the state. | |
8393 | */ | |
f775b13e RR |
8394 | if (init_event) |
8395 | kvm_put_guest_fpu(vcpu); | |
a554d207 WL |
8396 | mpx_state_buffer = get_xsave_addr(&vcpu->arch.guest_fpu.state.xsave, |
8397 | XFEATURE_MASK_BNDREGS); | |
8398 | if (mpx_state_buffer) | |
8399 | memset(mpx_state_buffer, 0, sizeof(struct mpx_bndreg_state)); | |
8400 | mpx_state_buffer = get_xsave_addr(&vcpu->arch.guest_fpu.state.xsave, | |
8401 | XFEATURE_MASK_BNDCSR); | |
8402 | if (mpx_state_buffer) | |
8403 | memset(mpx_state_buffer, 0, sizeof(struct mpx_bndcsr)); | |
f775b13e RR |
8404 | if (init_event) |
8405 | kvm_load_guest_fpu(vcpu); | |
a554d207 WL |
8406 | } |
8407 | ||
64d60670 | 8408 | if (!init_event) { |
d28bc9dd | 8409 | kvm_pmu_reset(vcpu); |
64d60670 | 8410 | vcpu->arch.smbase = 0x30000; |
db2336a8 KH |
8411 | |
8412 | vcpu->arch.msr_platform_info = MSR_PLATFORM_INFO_CPUID_FAULT; | |
8413 | vcpu->arch.msr_misc_features_enables = 0; | |
a554d207 WL |
8414 | |
8415 | vcpu->arch.xcr0 = XFEATURE_MASK_FP; | |
64d60670 | 8416 | } |
f5132b01 | 8417 | |
66f7b72e JS |
8418 | memset(vcpu->arch.regs, 0, sizeof(vcpu->arch.regs)); |
8419 | vcpu->arch.regs_avail = ~0; | |
8420 | vcpu->arch.regs_dirty = ~0; | |
8421 | ||
a554d207 WL |
8422 | vcpu->arch.ia32_xss = 0; |
8423 | ||
d28bc9dd | 8424 | kvm_x86_ops->vcpu_reset(vcpu, init_event); |
e9b11c17 ZX |
8425 | } |
8426 | ||
2b4a273b | 8427 | void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector) |
66450a21 JK |
8428 | { |
8429 | struct kvm_segment cs; | |
8430 | ||
8431 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
8432 | cs.selector = vector << 8; | |
8433 | cs.base = vector << 12; | |
8434 | kvm_set_segment(vcpu, &cs, VCPU_SREG_CS); | |
8435 | kvm_rip_write(vcpu, 0); | |
e9b11c17 ZX |
8436 | } |
8437 | ||
13a34e06 | 8438 | int kvm_arch_hardware_enable(void) |
e9b11c17 | 8439 | { |
ca84d1a2 ZA |
8440 | struct kvm *kvm; |
8441 | struct kvm_vcpu *vcpu; | |
8442 | int i; | |
0dd6a6ed ZA |
8443 | int ret; |
8444 | u64 local_tsc; | |
8445 | u64 max_tsc = 0; | |
8446 | bool stable, backwards_tsc = false; | |
18863bdd AK |
8447 | |
8448 | kvm_shared_msr_cpu_online(); | |
13a34e06 | 8449 | ret = kvm_x86_ops->hardware_enable(); |
0dd6a6ed ZA |
8450 | if (ret != 0) |
8451 | return ret; | |
8452 | ||
4ea1636b | 8453 | local_tsc = rdtsc(); |
b0c39dc6 | 8454 | stable = !kvm_check_tsc_unstable(); |
0dd6a6ed ZA |
8455 | list_for_each_entry(kvm, &vm_list, vm_list) { |
8456 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
8457 | if (!stable && vcpu->cpu == smp_processor_id()) | |
105b21bb | 8458 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
0dd6a6ed ZA |
8459 | if (stable && vcpu->arch.last_host_tsc > local_tsc) { |
8460 | backwards_tsc = true; | |
8461 | if (vcpu->arch.last_host_tsc > max_tsc) | |
8462 | max_tsc = vcpu->arch.last_host_tsc; | |
8463 | } | |
8464 | } | |
8465 | } | |
8466 | ||
8467 | /* | |
8468 | * Sometimes, even reliable TSCs go backwards. This happens on | |
8469 | * platforms that reset TSC during suspend or hibernate actions, but | |
8470 | * maintain synchronization. We must compensate. Fortunately, we can | |
8471 | * detect that condition here, which happens early in CPU bringup, | |
8472 | * before any KVM threads can be running. Unfortunately, we can't | |
8473 | * bring the TSCs fully up to date with real time, as we aren't yet far | |
8474 | * enough into CPU bringup that we know how much real time has actually | |
108b249c | 8475 | * elapsed; our helper function, ktime_get_boot_ns() will be using boot |
0dd6a6ed ZA |
8476 | * variables that haven't been updated yet. |
8477 | * | |
8478 | * So we simply find the maximum observed TSC above, then record the | |
8479 | * adjustment to TSC in each VCPU. When the VCPU later gets loaded, | |
8480 | * the adjustment will be applied. Note that we accumulate | |
8481 | * adjustments, in case multiple suspend cycles happen before some VCPU | |
8482 | * gets a chance to run again. In the event that no KVM threads get a | |
8483 | * chance to run, we will miss the entire elapsed period, as we'll have | |
8484 | * reset last_host_tsc, so VCPUs will not have the TSC adjusted and may | |
8485 | * loose cycle time. This isn't too big a deal, since the loss will be | |
8486 | * uniform across all VCPUs (not to mention the scenario is extremely | |
8487 | * unlikely). It is possible that a second hibernate recovery happens | |
8488 | * much faster than a first, causing the observed TSC here to be | |
8489 | * smaller; this would require additional padding adjustment, which is | |
8490 | * why we set last_host_tsc to the local tsc observed here. | |
8491 | * | |
8492 | * N.B. - this code below runs only on platforms with reliable TSC, | |
8493 | * as that is the only way backwards_tsc is set above. Also note | |
8494 | * that this runs for ALL vcpus, which is not a bug; all VCPUs should | |
8495 | * have the same delta_cyc adjustment applied if backwards_tsc | |
8496 | * is detected. Note further, this adjustment is only done once, | |
8497 | * as we reset last_host_tsc on all VCPUs to stop this from being | |
8498 | * called multiple times (one for each physical CPU bringup). | |
8499 | * | |
4a969980 | 8500 | * Platforms with unreliable TSCs don't have to deal with this, they |
0dd6a6ed ZA |
8501 | * will be compensated by the logic in vcpu_load, which sets the TSC to |
8502 | * catchup mode. This will catchup all VCPUs to real time, but cannot | |
8503 | * guarantee that they stay in perfect synchronization. | |
8504 | */ | |
8505 | if (backwards_tsc) { | |
8506 | u64 delta_cyc = max_tsc - local_tsc; | |
8507 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
a826faf1 | 8508 | kvm->arch.backwards_tsc_observed = true; |
0dd6a6ed ZA |
8509 | kvm_for_each_vcpu(i, vcpu, kvm) { |
8510 | vcpu->arch.tsc_offset_adjustment += delta_cyc; | |
8511 | vcpu->arch.last_host_tsc = local_tsc; | |
105b21bb | 8512 | kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu); |
0dd6a6ed ZA |
8513 | } |
8514 | ||
8515 | /* | |
8516 | * We have to disable TSC offset matching.. if you were | |
8517 | * booting a VM while issuing an S4 host suspend.... | |
8518 | * you may have some problem. Solving this issue is | |
8519 | * left as an exercise to the reader. | |
8520 | */ | |
8521 | kvm->arch.last_tsc_nsec = 0; | |
8522 | kvm->arch.last_tsc_write = 0; | |
8523 | } | |
8524 | ||
8525 | } | |
8526 | return 0; | |
e9b11c17 ZX |
8527 | } |
8528 | ||
13a34e06 | 8529 | void kvm_arch_hardware_disable(void) |
e9b11c17 | 8530 | { |
13a34e06 RK |
8531 | kvm_x86_ops->hardware_disable(); |
8532 | drop_user_return_notifiers(); | |
e9b11c17 ZX |
8533 | } |
8534 | ||
8535 | int kvm_arch_hardware_setup(void) | |
8536 | { | |
9e9c3fe4 NA |
8537 | int r; |
8538 | ||
8539 | r = kvm_x86_ops->hardware_setup(); | |
8540 | if (r != 0) | |
8541 | return r; | |
8542 | ||
35181e86 HZ |
8543 | if (kvm_has_tsc_control) { |
8544 | /* | |
8545 | * Make sure the user can only configure tsc_khz values that | |
8546 | * fit into a signed integer. | |
8547 | * A min value is not calculated needed because it will always | |
8548 | * be 1 on all machines. | |
8549 | */ | |
8550 | u64 max = min(0x7fffffffULL, | |
8551 | __scale_tsc(kvm_max_tsc_scaling_ratio, tsc_khz)); | |
8552 | kvm_max_guest_tsc_khz = max; | |
8553 | ||
ad721883 | 8554 | kvm_default_tsc_scaling_ratio = 1ULL << kvm_tsc_scaling_ratio_frac_bits; |
35181e86 | 8555 | } |
ad721883 | 8556 | |
9e9c3fe4 NA |
8557 | kvm_init_msr_list(); |
8558 | return 0; | |
e9b11c17 ZX |
8559 | } |
8560 | ||
8561 | void kvm_arch_hardware_unsetup(void) | |
8562 | { | |
8563 | kvm_x86_ops->hardware_unsetup(); | |
8564 | } | |
8565 | ||
8566 | void kvm_arch_check_processor_compat(void *rtn) | |
8567 | { | |
8568 | kvm_x86_ops->check_processor_compatibility(rtn); | |
d71ba788 PB |
8569 | } |
8570 | ||
8571 | bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu) | |
8572 | { | |
8573 | return vcpu->kvm->arch.bsp_vcpu_id == vcpu->vcpu_id; | |
8574 | } | |
8575 | EXPORT_SYMBOL_GPL(kvm_vcpu_is_reset_bsp); | |
8576 | ||
8577 | bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) | |
8578 | { | |
8579 | return (vcpu->arch.apic_base & MSR_IA32_APICBASE_BSP) != 0; | |
e9b11c17 ZX |
8580 | } |
8581 | ||
54e9818f | 8582 | struct static_key kvm_no_apic_vcpu __read_mostly; |
bce87cce | 8583 | EXPORT_SYMBOL_GPL(kvm_no_apic_vcpu); |
54e9818f | 8584 | |
e9b11c17 ZX |
8585 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
8586 | { | |
8587 | struct page *page; | |
e9b11c17 ZX |
8588 | int r; |
8589 | ||
b2a05fef | 8590 | vcpu->arch.apicv_active = kvm_x86_ops->get_enable_apicv(vcpu); |
9aabc88f | 8591 | vcpu->arch.emulate_ctxt.ops = &emulate_ops; |
26de7988 | 8592 | if (!irqchip_in_kernel(vcpu->kvm) || kvm_vcpu_is_reset_bsp(vcpu)) |
a4535290 | 8593 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 8594 | else |
a4535290 | 8595 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
8596 | |
8597 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
8598 | if (!page) { | |
8599 | r = -ENOMEM; | |
8600 | goto fail; | |
8601 | } | |
ad312c7c | 8602 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 | 8603 | |
cc578287 | 8604 | kvm_set_tsc_khz(vcpu, max_tsc_khz); |
c285545f | 8605 | |
e9b11c17 ZX |
8606 | r = kvm_mmu_create(vcpu); |
8607 | if (r < 0) | |
8608 | goto fail_free_pio_data; | |
8609 | ||
26de7988 | 8610 | if (irqchip_in_kernel(vcpu->kvm)) { |
e9b11c17 ZX |
8611 | r = kvm_create_lapic(vcpu); |
8612 | if (r < 0) | |
8613 | goto fail_mmu_destroy; | |
54e9818f GN |
8614 | } else |
8615 | static_key_slow_inc(&kvm_no_apic_vcpu); | |
e9b11c17 | 8616 | |
890ca9ae HY |
8617 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
8618 | GFP_KERNEL); | |
8619 | if (!vcpu->arch.mce_banks) { | |
8620 | r = -ENOMEM; | |
443c39bc | 8621 | goto fail_free_lapic; |
890ca9ae HY |
8622 | } |
8623 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
8624 | ||
f1797359 WY |
8625 | if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL)) { |
8626 | r = -ENOMEM; | |
f5f48ee1 | 8627 | goto fail_free_mce_banks; |
f1797359 | 8628 | } |
f5f48ee1 | 8629 | |
0ee6a517 | 8630 | fx_init(vcpu); |
66f7b72e | 8631 | |
4344ee98 | 8632 | vcpu->arch.guest_xstate_size = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET; |
d7876f1b | 8633 | |
5a4f55cd EK |
8634 | vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu); |
8635 | ||
74545705 RK |
8636 | vcpu->arch.pat = MSR_IA32_CR_PAT_DEFAULT; |
8637 | ||
af585b92 | 8638 | kvm_async_pf_hash_reset(vcpu); |
f5132b01 | 8639 | kvm_pmu_init(vcpu); |
af585b92 | 8640 | |
1c1a9ce9 | 8641 | vcpu->arch.pending_external_vector = -1; |
de63ad4c | 8642 | vcpu->arch.preempted_in_kernel = false; |
1c1a9ce9 | 8643 | |
5c919412 AS |
8644 | kvm_hv_vcpu_init(vcpu); |
8645 | ||
e9b11c17 | 8646 | return 0; |
0ee6a517 | 8647 | |
f5f48ee1 SY |
8648 | fail_free_mce_banks: |
8649 | kfree(vcpu->arch.mce_banks); | |
443c39bc WY |
8650 | fail_free_lapic: |
8651 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
8652 | fail_mmu_destroy: |
8653 | kvm_mmu_destroy(vcpu); | |
8654 | fail_free_pio_data: | |
ad312c7c | 8655 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
8656 | fail: |
8657 | return r; | |
8658 | } | |
8659 | ||
8660 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
8661 | { | |
f656ce01 MT |
8662 | int idx; |
8663 | ||
1f4b34f8 | 8664 | kvm_hv_vcpu_uninit(vcpu); |
f5132b01 | 8665 | kvm_pmu_destroy(vcpu); |
36cb93fd | 8666 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 8667 | kvm_free_lapic(vcpu); |
f656ce01 | 8668 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 8669 | kvm_mmu_destroy(vcpu); |
f656ce01 | 8670 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 8671 | free_page((unsigned long)vcpu->arch.pio_data); |
35754c98 | 8672 | if (!lapic_in_kernel(vcpu)) |
54e9818f | 8673 | static_key_slow_dec(&kvm_no_apic_vcpu); |
e9b11c17 | 8674 | } |
d19a9cd2 | 8675 | |
e790d9ef RK |
8676 | void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) |
8677 | { | |
ae97a3b8 | 8678 | kvm_x86_ops->sched_in(vcpu, cpu); |
e790d9ef RK |
8679 | } |
8680 | ||
e08b9637 | 8681 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
d19a9cd2 | 8682 | { |
e08b9637 CO |
8683 | if (type) |
8684 | return -EINVAL; | |
8685 | ||
6ef768fa | 8686 | INIT_HLIST_HEAD(&kvm->arch.mask_notifier_list); |
f05e70ac | 8687 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
365c8868 | 8688 | INIT_LIST_HEAD(&kvm->arch.zapped_obsolete_pages); |
4d5c5d0f | 8689 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
e0f0bbc5 | 8690 | atomic_set(&kvm->arch.noncoherent_dma_count, 0); |
d19a9cd2 | 8691 | |
5550af4d SY |
8692 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
8693 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
7a84428a AW |
8694 | /* Reserve bit 1 of irq_sources_bitmap for irqfd-resampler */ |
8695 | set_bit(KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID, | |
8696 | &kvm->arch.irq_sources_bitmap); | |
5550af4d | 8697 | |
038f8c11 | 8698 | raw_spin_lock_init(&kvm->arch.tsc_write_lock); |
1e08ec4a | 8699 | mutex_init(&kvm->arch.apic_map_lock); |
d828199e MT |
8700 | spin_lock_init(&kvm->arch.pvclock_gtod_sync_lock); |
8701 | ||
108b249c | 8702 | kvm->arch.kvmclock_offset = -ktime_get_boot_ns(); |
d828199e | 8703 | pvclock_update_vm_gtod_copy(kvm); |
53f658b3 | 8704 | |
7e44e449 | 8705 | INIT_DELAYED_WORK(&kvm->arch.kvmclock_update_work, kvmclock_update_fn); |
332967a3 | 8706 | INIT_DELAYED_WORK(&kvm->arch.kvmclock_sync_work, kvmclock_sync_fn); |
7e44e449 | 8707 | |
cbc0236a | 8708 | kvm_hv_init_vm(kvm); |
0eb05bf2 | 8709 | kvm_page_track_init(kvm); |
13d268ca | 8710 | kvm_mmu_init_vm(kvm); |
0eb05bf2 | 8711 | |
03543133 SS |
8712 | if (kvm_x86_ops->vm_init) |
8713 | return kvm_x86_ops->vm_init(kvm); | |
8714 | ||
d89f5eff | 8715 | return 0; |
d19a9cd2 ZX |
8716 | } |
8717 | ||
8718 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
8719 | { | |
ec7660cc | 8720 | vcpu_load(vcpu); |
d19a9cd2 ZX |
8721 | kvm_mmu_unload(vcpu); |
8722 | vcpu_put(vcpu); | |
8723 | } | |
8724 | ||
8725 | static void kvm_free_vcpus(struct kvm *kvm) | |
8726 | { | |
8727 | unsigned int i; | |
988a2cae | 8728 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
8729 | |
8730 | /* | |
8731 | * Unpin any mmu pages first. | |
8732 | */ | |
af585b92 GN |
8733 | kvm_for_each_vcpu(i, vcpu, kvm) { |
8734 | kvm_clear_async_pf_completion_queue(vcpu); | |
988a2cae | 8735 | kvm_unload_vcpu_mmu(vcpu); |
af585b92 | 8736 | } |
988a2cae GN |
8737 | kvm_for_each_vcpu(i, vcpu, kvm) |
8738 | kvm_arch_vcpu_free(vcpu); | |
8739 | ||
8740 | mutex_lock(&kvm->lock); | |
8741 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
8742 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 8743 | |
988a2cae GN |
8744 | atomic_set(&kvm->online_vcpus, 0); |
8745 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
8746 | } |
8747 | ||
ad8ba2cd SY |
8748 | void kvm_arch_sync_events(struct kvm *kvm) |
8749 | { | |
332967a3 | 8750 | cancel_delayed_work_sync(&kvm->arch.kvmclock_sync_work); |
7e44e449 | 8751 | cancel_delayed_work_sync(&kvm->arch.kvmclock_update_work); |
aea924f6 | 8752 | kvm_free_pit(kvm); |
ad8ba2cd SY |
8753 | } |
8754 | ||
1d8007bd | 8755 | int __x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size) |
9da0e4d5 PB |
8756 | { |
8757 | int i, r; | |
25188b99 | 8758 | unsigned long hva; |
f0d648bd PB |
8759 | struct kvm_memslots *slots = kvm_memslots(kvm); |
8760 | struct kvm_memory_slot *slot, old; | |
9da0e4d5 PB |
8761 | |
8762 | /* Called with kvm->slots_lock held. */ | |
1d8007bd PB |
8763 | if (WARN_ON(id >= KVM_MEM_SLOTS_NUM)) |
8764 | return -EINVAL; | |
9da0e4d5 | 8765 | |
f0d648bd PB |
8766 | slot = id_to_memslot(slots, id); |
8767 | if (size) { | |
b21629da | 8768 | if (slot->npages) |
f0d648bd PB |
8769 | return -EEXIST; |
8770 | ||
8771 | /* | |
8772 | * MAP_SHARED to prevent internal slot pages from being moved | |
8773 | * by fork()/COW. | |
8774 | */ | |
8775 | hva = vm_mmap(NULL, 0, size, PROT_READ | PROT_WRITE, | |
8776 | MAP_SHARED | MAP_ANONYMOUS, 0); | |
8777 | if (IS_ERR((void *)hva)) | |
8778 | return PTR_ERR((void *)hva); | |
8779 | } else { | |
8780 | if (!slot->npages) | |
8781 | return 0; | |
8782 | ||
8783 | hva = 0; | |
8784 | } | |
8785 | ||
8786 | old = *slot; | |
9da0e4d5 | 8787 | for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) { |
1d8007bd | 8788 | struct kvm_userspace_memory_region m; |
9da0e4d5 | 8789 | |
1d8007bd PB |
8790 | m.slot = id | (i << 16); |
8791 | m.flags = 0; | |
8792 | m.guest_phys_addr = gpa; | |
f0d648bd | 8793 | m.userspace_addr = hva; |
1d8007bd | 8794 | m.memory_size = size; |
9da0e4d5 PB |
8795 | r = __kvm_set_memory_region(kvm, &m); |
8796 | if (r < 0) | |
8797 | return r; | |
8798 | } | |
8799 | ||
103c763c EB |
8800 | if (!size) |
8801 | vm_munmap(old.userspace_addr, old.npages * PAGE_SIZE); | |
f0d648bd | 8802 | |
9da0e4d5 PB |
8803 | return 0; |
8804 | } | |
8805 | EXPORT_SYMBOL_GPL(__x86_set_memory_region); | |
8806 | ||
1d8007bd | 8807 | int x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size) |
9da0e4d5 PB |
8808 | { |
8809 | int r; | |
8810 | ||
8811 | mutex_lock(&kvm->slots_lock); | |
1d8007bd | 8812 | r = __x86_set_memory_region(kvm, id, gpa, size); |
9da0e4d5 PB |
8813 | mutex_unlock(&kvm->slots_lock); |
8814 | ||
8815 | return r; | |
8816 | } | |
8817 | EXPORT_SYMBOL_GPL(x86_set_memory_region); | |
8818 | ||
d19a9cd2 ZX |
8819 | void kvm_arch_destroy_vm(struct kvm *kvm) |
8820 | { | |
27469d29 AH |
8821 | if (current->mm == kvm->mm) { |
8822 | /* | |
8823 | * Free memory regions allocated on behalf of userspace, | |
8824 | * unless the the memory map has changed due to process exit | |
8825 | * or fd copying. | |
8826 | */ | |
1d8007bd PB |
8827 | x86_set_memory_region(kvm, APIC_ACCESS_PAGE_PRIVATE_MEMSLOT, 0, 0); |
8828 | x86_set_memory_region(kvm, IDENTITY_PAGETABLE_PRIVATE_MEMSLOT, 0, 0); | |
8829 | x86_set_memory_region(kvm, TSS_PRIVATE_MEMSLOT, 0, 0); | |
27469d29 | 8830 | } |
03543133 SS |
8831 | if (kvm_x86_ops->vm_destroy) |
8832 | kvm_x86_ops->vm_destroy(kvm); | |
c761159c PX |
8833 | kvm_pic_destroy(kvm); |
8834 | kvm_ioapic_destroy(kvm); | |
d19a9cd2 | 8835 | kvm_free_vcpus(kvm); |
af1bae54 | 8836 | kvfree(rcu_dereference_check(kvm->arch.apic_map, 1)); |
13d268ca | 8837 | kvm_mmu_uninit_vm(kvm); |
2beb6dad | 8838 | kvm_page_track_cleanup(kvm); |
cbc0236a | 8839 | kvm_hv_destroy_vm(kvm); |
d19a9cd2 | 8840 | } |
0de10343 | 8841 | |
5587027c | 8842 | void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, |
db3fe4eb TY |
8843 | struct kvm_memory_slot *dont) |
8844 | { | |
8845 | int i; | |
8846 | ||
d89cc617 TY |
8847 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
8848 | if (!dont || free->arch.rmap[i] != dont->arch.rmap[i]) { | |
548ef284 | 8849 | kvfree(free->arch.rmap[i]); |
d89cc617 | 8850 | free->arch.rmap[i] = NULL; |
77d11309 | 8851 | } |
d89cc617 TY |
8852 | if (i == 0) |
8853 | continue; | |
8854 | ||
8855 | if (!dont || free->arch.lpage_info[i - 1] != | |
8856 | dont->arch.lpage_info[i - 1]) { | |
548ef284 | 8857 | kvfree(free->arch.lpage_info[i - 1]); |
d89cc617 | 8858 | free->arch.lpage_info[i - 1] = NULL; |
db3fe4eb TY |
8859 | } |
8860 | } | |
21ebbeda XG |
8861 | |
8862 | kvm_page_track_free_memslot(free, dont); | |
db3fe4eb TY |
8863 | } |
8864 | ||
5587027c AK |
8865 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
8866 | unsigned long npages) | |
db3fe4eb TY |
8867 | { |
8868 | int i; | |
8869 | ||
d89cc617 | 8870 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
92f94f1e | 8871 | struct kvm_lpage_info *linfo; |
db3fe4eb TY |
8872 | unsigned long ugfn; |
8873 | int lpages; | |
d89cc617 | 8874 | int level = i + 1; |
db3fe4eb TY |
8875 | |
8876 | lpages = gfn_to_index(slot->base_gfn + npages - 1, | |
8877 | slot->base_gfn, level) + 1; | |
8878 | ||
d89cc617 | 8879 | slot->arch.rmap[i] = |
a7c3e901 | 8880 | kvzalloc(lpages * sizeof(*slot->arch.rmap[i]), GFP_KERNEL); |
d89cc617 | 8881 | if (!slot->arch.rmap[i]) |
77d11309 | 8882 | goto out_free; |
d89cc617 TY |
8883 | if (i == 0) |
8884 | continue; | |
77d11309 | 8885 | |
a7c3e901 | 8886 | linfo = kvzalloc(lpages * sizeof(*linfo), GFP_KERNEL); |
92f94f1e | 8887 | if (!linfo) |
db3fe4eb TY |
8888 | goto out_free; |
8889 | ||
92f94f1e XG |
8890 | slot->arch.lpage_info[i - 1] = linfo; |
8891 | ||
db3fe4eb | 8892 | if (slot->base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1)) |
92f94f1e | 8893 | linfo[0].disallow_lpage = 1; |
db3fe4eb | 8894 | if ((slot->base_gfn + npages) & (KVM_PAGES_PER_HPAGE(level) - 1)) |
92f94f1e | 8895 | linfo[lpages - 1].disallow_lpage = 1; |
db3fe4eb TY |
8896 | ugfn = slot->userspace_addr >> PAGE_SHIFT; |
8897 | /* | |
8898 | * If the gfn and userspace address are not aligned wrt each | |
8899 | * other, or if explicitly asked to, disable large page | |
8900 | * support for this slot | |
8901 | */ | |
8902 | if ((slot->base_gfn ^ ugfn) & (KVM_PAGES_PER_HPAGE(level) - 1) || | |
8903 | !kvm_largepages_enabled()) { | |
8904 | unsigned long j; | |
8905 | ||
8906 | for (j = 0; j < lpages; ++j) | |
92f94f1e | 8907 | linfo[j].disallow_lpage = 1; |
db3fe4eb TY |
8908 | } |
8909 | } | |
8910 | ||
21ebbeda XG |
8911 | if (kvm_page_track_create_memslot(slot, npages)) |
8912 | goto out_free; | |
8913 | ||
db3fe4eb TY |
8914 | return 0; |
8915 | ||
8916 | out_free: | |
d89cc617 | 8917 | for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) { |
548ef284 | 8918 | kvfree(slot->arch.rmap[i]); |
d89cc617 TY |
8919 | slot->arch.rmap[i] = NULL; |
8920 | if (i == 0) | |
8921 | continue; | |
8922 | ||
548ef284 | 8923 | kvfree(slot->arch.lpage_info[i - 1]); |
d89cc617 | 8924 | slot->arch.lpage_info[i - 1] = NULL; |
db3fe4eb TY |
8925 | } |
8926 | return -ENOMEM; | |
8927 | } | |
8928 | ||
15f46015 | 8929 | void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) |
e59dbe09 | 8930 | { |
e6dff7d1 TY |
8931 | /* |
8932 | * memslots->generation has been incremented. | |
8933 | * mmio generation may have reached its maximum value. | |
8934 | */ | |
54bf36aa | 8935 | kvm_mmu_invalidate_mmio_sptes(kvm, slots); |
e59dbe09 TY |
8936 | } |
8937 | ||
f7784b8e MT |
8938 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
8939 | struct kvm_memory_slot *memslot, | |
09170a49 | 8940 | const struct kvm_userspace_memory_region *mem, |
7b6195a9 | 8941 | enum kvm_mr_change change) |
0de10343 | 8942 | { |
f7784b8e MT |
8943 | return 0; |
8944 | } | |
8945 | ||
88178fd4 KH |
8946 | static void kvm_mmu_slot_apply_flags(struct kvm *kvm, |
8947 | struct kvm_memory_slot *new) | |
8948 | { | |
8949 | /* Still write protect RO slot */ | |
8950 | if (new->flags & KVM_MEM_READONLY) { | |
8951 | kvm_mmu_slot_remove_write_access(kvm, new); | |
8952 | return; | |
8953 | } | |
8954 | ||
8955 | /* | |
8956 | * Call kvm_x86_ops dirty logging hooks when they are valid. | |
8957 | * | |
8958 | * kvm_x86_ops->slot_disable_log_dirty is called when: | |
8959 | * | |
8960 | * - KVM_MR_CREATE with dirty logging is disabled | |
8961 | * - KVM_MR_FLAGS_ONLY with dirty logging is disabled in new flag | |
8962 | * | |
8963 | * The reason is, in case of PML, we need to set D-bit for any slots | |
8964 | * with dirty logging disabled in order to eliminate unnecessary GPA | |
8965 | * logging in PML buffer (and potential PML buffer full VMEXT). This | |
8966 | * guarantees leaving PML enabled during guest's lifetime won't have | |
8967 | * any additonal overhead from PML when guest is running with dirty | |
8968 | * logging disabled for memory slots. | |
8969 | * | |
8970 | * kvm_x86_ops->slot_enable_log_dirty is called when switching new slot | |
8971 | * to dirty logging mode. | |
8972 | * | |
8973 | * If kvm_x86_ops dirty logging hooks are invalid, use write protect. | |
8974 | * | |
8975 | * In case of write protect: | |
8976 | * | |
8977 | * Write protect all pages for dirty logging. | |
8978 | * | |
8979 | * All the sptes including the large sptes which point to this | |
8980 | * slot are set to readonly. We can not create any new large | |
8981 | * spte on this slot until the end of the logging. | |
8982 | * | |
8983 | * See the comments in fast_page_fault(). | |
8984 | */ | |
8985 | if (new->flags & KVM_MEM_LOG_DIRTY_PAGES) { | |
8986 | if (kvm_x86_ops->slot_enable_log_dirty) | |
8987 | kvm_x86_ops->slot_enable_log_dirty(kvm, new); | |
8988 | else | |
8989 | kvm_mmu_slot_remove_write_access(kvm, new); | |
8990 | } else { | |
8991 | if (kvm_x86_ops->slot_disable_log_dirty) | |
8992 | kvm_x86_ops->slot_disable_log_dirty(kvm, new); | |
8993 | } | |
8994 | } | |
8995 | ||
f7784b8e | 8996 | void kvm_arch_commit_memory_region(struct kvm *kvm, |
09170a49 | 8997 | const struct kvm_userspace_memory_region *mem, |
8482644a | 8998 | const struct kvm_memory_slot *old, |
f36f3f28 | 8999 | const struct kvm_memory_slot *new, |
8482644a | 9000 | enum kvm_mr_change change) |
f7784b8e | 9001 | { |
8482644a | 9002 | int nr_mmu_pages = 0; |
f7784b8e | 9003 | |
48c0e4e9 XG |
9004 | if (!kvm->arch.n_requested_mmu_pages) |
9005 | nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); | |
9006 | ||
48c0e4e9 | 9007 | if (nr_mmu_pages) |
0de10343 | 9008 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); |
1c91cad4 | 9009 | |
3ea3b7fa WL |
9010 | /* |
9011 | * Dirty logging tracks sptes in 4k granularity, meaning that large | |
9012 | * sptes have to be split. If live migration is successful, the guest | |
9013 | * in the source machine will be destroyed and large sptes will be | |
9014 | * created in the destination. However, if the guest continues to run | |
9015 | * in the source machine (for example if live migration fails), small | |
9016 | * sptes will remain around and cause bad performance. | |
9017 | * | |
9018 | * Scan sptes if dirty logging has been stopped, dropping those | |
9019 | * which can be collapsed into a single large-page spte. Later | |
9020 | * page faults will create the large-page sptes. | |
9021 | */ | |
9022 | if ((change != KVM_MR_DELETE) && | |
9023 | (old->flags & KVM_MEM_LOG_DIRTY_PAGES) && | |
9024 | !(new->flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
9025 | kvm_mmu_zap_collapsible_sptes(kvm, new); | |
9026 | ||
c972f3b1 | 9027 | /* |
88178fd4 | 9028 | * Set up write protection and/or dirty logging for the new slot. |
c126d94f | 9029 | * |
88178fd4 KH |
9030 | * For KVM_MR_DELETE and KVM_MR_MOVE, the shadow pages of old slot have |
9031 | * been zapped so no dirty logging staff is needed for old slot. For | |
9032 | * KVM_MR_FLAGS_ONLY, the old slot is essentially the same one as the | |
9033 | * new and it's also covered when dealing with the new slot. | |
f36f3f28 PB |
9034 | * |
9035 | * FIXME: const-ify all uses of struct kvm_memory_slot. | |
c972f3b1 | 9036 | */ |
88178fd4 | 9037 | if (change != KVM_MR_DELETE) |
f36f3f28 | 9038 | kvm_mmu_slot_apply_flags(kvm, (struct kvm_memory_slot *) new); |
0de10343 | 9039 | } |
1d737c8a | 9040 | |
2df72e9b | 9041 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
34d4cb8f | 9042 | { |
6ca18b69 | 9043 | kvm_mmu_invalidate_zap_all_pages(kvm); |
34d4cb8f MT |
9044 | } |
9045 | ||
2df72e9b MT |
9046 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
9047 | struct kvm_memory_slot *slot) | |
9048 | { | |
ae7cd873 | 9049 | kvm_page_track_flush_slot(kvm, slot); |
2df72e9b MT |
9050 | } |
9051 | ||
5d9bc648 PB |
9052 | static inline bool kvm_vcpu_has_events(struct kvm_vcpu *vcpu) |
9053 | { | |
9054 | if (!list_empty_careful(&vcpu->async_pf.done)) | |
9055 | return true; | |
9056 | ||
9057 | if (kvm_apic_has_events(vcpu)) | |
9058 | return true; | |
9059 | ||
9060 | if (vcpu->arch.pv.pv_unhalted) | |
9061 | return true; | |
9062 | ||
a5f01f8e WL |
9063 | if (vcpu->arch.exception.pending) |
9064 | return true; | |
9065 | ||
47a66eed Z |
9066 | if (kvm_test_request(KVM_REQ_NMI, vcpu) || |
9067 | (vcpu->arch.nmi_pending && | |
9068 | kvm_x86_ops->nmi_allowed(vcpu))) | |
5d9bc648 PB |
9069 | return true; |
9070 | ||
47a66eed Z |
9071 | if (kvm_test_request(KVM_REQ_SMI, vcpu) || |
9072 | (vcpu->arch.smi_pending && !is_smm(vcpu))) | |
73917739 PB |
9073 | return true; |
9074 | ||
5d9bc648 PB |
9075 | if (kvm_arch_interrupt_allowed(vcpu) && |
9076 | kvm_cpu_has_interrupt(vcpu)) | |
9077 | return true; | |
9078 | ||
1f4b34f8 AS |
9079 | if (kvm_hv_has_stimer_pending(vcpu)) |
9080 | return true; | |
9081 | ||
5d9bc648 PB |
9082 | return false; |
9083 | } | |
9084 | ||
1d737c8a ZX |
9085 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
9086 | { | |
5d9bc648 | 9087 | return kvm_vcpu_running(vcpu) || kvm_vcpu_has_events(vcpu); |
1d737c8a | 9088 | } |
5736199a | 9089 | |
199b5763 LM |
9090 | bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu) |
9091 | { | |
de63ad4c | 9092 | return vcpu->arch.preempted_in_kernel; |
199b5763 LM |
9093 | } |
9094 | ||
b6d33834 | 9095 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
5736199a | 9096 | { |
b6d33834 | 9097 | return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; |
5736199a | 9098 | } |
78646121 GN |
9099 | |
9100 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
9101 | { | |
9102 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
9103 | } | |
229456fc | 9104 | |
82b32774 | 9105 | unsigned long kvm_get_linear_rip(struct kvm_vcpu *vcpu) |
f92653ee | 9106 | { |
82b32774 NA |
9107 | if (is_64_bit_mode(vcpu)) |
9108 | return kvm_rip_read(vcpu); | |
9109 | return (u32)(get_segment_base(vcpu, VCPU_SREG_CS) + | |
9110 | kvm_rip_read(vcpu)); | |
9111 | } | |
9112 | EXPORT_SYMBOL_GPL(kvm_get_linear_rip); | |
f92653ee | 9113 | |
82b32774 NA |
9114 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
9115 | { | |
9116 | return kvm_get_linear_rip(vcpu) == linear_rip; | |
f92653ee JK |
9117 | } |
9118 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); | |
9119 | ||
94fe45da JK |
9120 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
9121 | { | |
9122 | unsigned long rflags; | |
9123 | ||
9124 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
9125 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
c310bac5 | 9126 | rflags &= ~X86_EFLAGS_TF; |
94fe45da JK |
9127 | return rflags; |
9128 | } | |
9129 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
9130 | ||
6addfc42 | 9131 | static void __kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) |
94fe45da JK |
9132 | { |
9133 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
f92653ee | 9134 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
c310bac5 | 9135 | rflags |= X86_EFLAGS_TF; |
94fe45da | 9136 | kvm_x86_ops->set_rflags(vcpu, rflags); |
6addfc42 PB |
9137 | } |
9138 | ||
9139 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
9140 | { | |
9141 | __kvm_set_rflags(vcpu, rflags); | |
3842d135 | 9142 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
94fe45da JK |
9143 | } |
9144 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
9145 | ||
56028d08 GN |
9146 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work) |
9147 | { | |
9148 | int r; | |
9149 | ||
fb67e14f | 9150 | if ((vcpu->arch.mmu.direct_map != work->arch.direct_map) || |
f2e10669 | 9151 | work->wakeup_all) |
56028d08 GN |
9152 | return; |
9153 | ||
9154 | r = kvm_mmu_reload(vcpu); | |
9155 | if (unlikely(r)) | |
9156 | return; | |
9157 | ||
fb67e14f XG |
9158 | if (!vcpu->arch.mmu.direct_map && |
9159 | work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu)) | |
9160 | return; | |
9161 | ||
56028d08 GN |
9162 | vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true); |
9163 | } | |
9164 | ||
af585b92 GN |
9165 | static inline u32 kvm_async_pf_hash_fn(gfn_t gfn) |
9166 | { | |
9167 | return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU)); | |
9168 | } | |
9169 | ||
9170 | static inline u32 kvm_async_pf_next_probe(u32 key) | |
9171 | { | |
9172 | return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1); | |
9173 | } | |
9174 | ||
9175 | static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
9176 | { | |
9177 | u32 key = kvm_async_pf_hash_fn(gfn); | |
9178 | ||
9179 | while (vcpu->arch.apf.gfns[key] != ~0) | |
9180 | key = kvm_async_pf_next_probe(key); | |
9181 | ||
9182 | vcpu->arch.apf.gfns[key] = gfn; | |
9183 | } | |
9184 | ||
9185 | static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn) | |
9186 | { | |
9187 | int i; | |
9188 | u32 key = kvm_async_pf_hash_fn(gfn); | |
9189 | ||
9190 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) && | |
c7d28c24 XG |
9191 | (vcpu->arch.apf.gfns[key] != gfn && |
9192 | vcpu->arch.apf.gfns[key] != ~0); i++) | |
af585b92 GN |
9193 | key = kvm_async_pf_next_probe(key); |
9194 | ||
9195 | return key; | |
9196 | } | |
9197 | ||
9198 | bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
9199 | { | |
9200 | return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn; | |
9201 | } | |
9202 | ||
9203 | static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
9204 | { | |
9205 | u32 i, j, k; | |
9206 | ||
9207 | i = j = kvm_async_pf_gfn_slot(vcpu, gfn); | |
9208 | while (true) { | |
9209 | vcpu->arch.apf.gfns[i] = ~0; | |
9210 | do { | |
9211 | j = kvm_async_pf_next_probe(j); | |
9212 | if (vcpu->arch.apf.gfns[j] == ~0) | |
9213 | return; | |
9214 | k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]); | |
9215 | /* | |
9216 | * k lies cyclically in ]i,j] | |
9217 | * | i.k.j | | |
9218 | * |....j i.k.| or |.k..j i...| | |
9219 | */ | |
9220 | } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j)); | |
9221 | vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j]; | |
9222 | i = j; | |
9223 | } | |
9224 | } | |
9225 | ||
7c90705b GN |
9226 | static int apf_put_user(struct kvm_vcpu *vcpu, u32 val) |
9227 | { | |
4e335d9e PB |
9228 | |
9229 | return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val, | |
9230 | sizeof(val)); | |
7c90705b GN |
9231 | } |
9232 | ||
9a6e7c39 WL |
9233 | static int apf_get_user(struct kvm_vcpu *vcpu, u32 *val) |
9234 | { | |
9235 | ||
9236 | return kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, val, | |
9237 | sizeof(u32)); | |
9238 | } | |
9239 | ||
af585b92 GN |
9240 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
9241 | struct kvm_async_pf *work) | |
9242 | { | |
6389ee94 AK |
9243 | struct x86_exception fault; |
9244 | ||
7c90705b | 9245 | trace_kvm_async_pf_not_present(work->arch.token, work->gva); |
af585b92 | 9246 | kvm_add_async_pf_gfn(vcpu, work->arch.gfn); |
7c90705b GN |
9247 | |
9248 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) || | |
fc5f06fa GN |
9249 | (vcpu->arch.apf.send_user_only && |
9250 | kvm_x86_ops->get_cpl(vcpu) == 0)) | |
7c90705b GN |
9251 | kvm_make_request(KVM_REQ_APF_HALT, vcpu); |
9252 | else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) { | |
6389ee94 AK |
9253 | fault.vector = PF_VECTOR; |
9254 | fault.error_code_valid = true; | |
9255 | fault.error_code = 0; | |
9256 | fault.nested_page_fault = false; | |
9257 | fault.address = work->arch.token; | |
adfe20fb | 9258 | fault.async_page_fault = true; |
6389ee94 | 9259 | kvm_inject_page_fault(vcpu, &fault); |
7c90705b | 9260 | } |
af585b92 GN |
9261 | } |
9262 | ||
9263 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
9264 | struct kvm_async_pf *work) | |
9265 | { | |
6389ee94 | 9266 | struct x86_exception fault; |
9a6e7c39 | 9267 | u32 val; |
6389ee94 | 9268 | |
f2e10669 | 9269 | if (work->wakeup_all) |
7c90705b GN |
9270 | work->arch.token = ~0; /* broadcast wakeup */ |
9271 | else | |
9272 | kvm_del_async_pf_gfn(vcpu, work->arch.gfn); | |
24dccf83 | 9273 | trace_kvm_async_pf_ready(work->arch.token, work->gva); |
7c90705b | 9274 | |
9a6e7c39 WL |
9275 | if (vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED && |
9276 | !apf_get_user(vcpu, &val)) { | |
9277 | if (val == KVM_PV_REASON_PAGE_NOT_PRESENT && | |
9278 | vcpu->arch.exception.pending && | |
9279 | vcpu->arch.exception.nr == PF_VECTOR && | |
9280 | !apf_put_user(vcpu, 0)) { | |
9281 | vcpu->arch.exception.injected = false; | |
9282 | vcpu->arch.exception.pending = false; | |
9283 | vcpu->arch.exception.nr = 0; | |
9284 | vcpu->arch.exception.has_error_code = false; | |
9285 | vcpu->arch.exception.error_code = 0; | |
9286 | } else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) { | |
9287 | fault.vector = PF_VECTOR; | |
9288 | fault.error_code_valid = true; | |
9289 | fault.error_code = 0; | |
9290 | fault.nested_page_fault = false; | |
9291 | fault.address = work->arch.token; | |
9292 | fault.async_page_fault = true; | |
9293 | kvm_inject_page_fault(vcpu, &fault); | |
9294 | } | |
7c90705b | 9295 | } |
e6d53e3b | 9296 | vcpu->arch.apf.halted = false; |
a4fa1635 | 9297 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
7c90705b GN |
9298 | } |
9299 | ||
9300 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
9301 | { | |
9302 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED)) | |
9303 | return true; | |
9304 | else | |
9bc1f09f | 9305 | return kvm_can_do_async_pf(vcpu); |
af585b92 GN |
9306 | } |
9307 | ||
5544eb9b PB |
9308 | void kvm_arch_start_assignment(struct kvm *kvm) |
9309 | { | |
9310 | atomic_inc(&kvm->arch.assigned_device_count); | |
9311 | } | |
9312 | EXPORT_SYMBOL_GPL(kvm_arch_start_assignment); | |
9313 | ||
9314 | void kvm_arch_end_assignment(struct kvm *kvm) | |
9315 | { | |
9316 | atomic_dec(&kvm->arch.assigned_device_count); | |
9317 | } | |
9318 | EXPORT_SYMBOL_GPL(kvm_arch_end_assignment); | |
9319 | ||
9320 | bool kvm_arch_has_assigned_device(struct kvm *kvm) | |
9321 | { | |
9322 | return atomic_read(&kvm->arch.assigned_device_count); | |
9323 | } | |
9324 | EXPORT_SYMBOL_GPL(kvm_arch_has_assigned_device); | |
9325 | ||
e0f0bbc5 AW |
9326 | void kvm_arch_register_noncoherent_dma(struct kvm *kvm) |
9327 | { | |
9328 | atomic_inc(&kvm->arch.noncoherent_dma_count); | |
9329 | } | |
9330 | EXPORT_SYMBOL_GPL(kvm_arch_register_noncoherent_dma); | |
9331 | ||
9332 | void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm) | |
9333 | { | |
9334 | atomic_dec(&kvm->arch.noncoherent_dma_count); | |
9335 | } | |
9336 | EXPORT_SYMBOL_GPL(kvm_arch_unregister_noncoherent_dma); | |
9337 | ||
9338 | bool kvm_arch_has_noncoherent_dma(struct kvm *kvm) | |
9339 | { | |
9340 | return atomic_read(&kvm->arch.noncoherent_dma_count); | |
9341 | } | |
9342 | EXPORT_SYMBOL_GPL(kvm_arch_has_noncoherent_dma); | |
9343 | ||
14717e20 AW |
9344 | bool kvm_arch_has_irq_bypass(void) |
9345 | { | |
9346 | return kvm_x86_ops->update_pi_irte != NULL; | |
9347 | } | |
9348 | ||
87276880 FW |
9349 | int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons, |
9350 | struct irq_bypass_producer *prod) | |
9351 | { | |
9352 | struct kvm_kernel_irqfd *irqfd = | |
9353 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
9354 | ||
14717e20 | 9355 | irqfd->producer = prod; |
87276880 | 9356 | |
14717e20 AW |
9357 | return kvm_x86_ops->update_pi_irte(irqfd->kvm, |
9358 | prod->irq, irqfd->gsi, 1); | |
87276880 FW |
9359 | } |
9360 | ||
9361 | void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons, | |
9362 | struct irq_bypass_producer *prod) | |
9363 | { | |
9364 | int ret; | |
9365 | struct kvm_kernel_irqfd *irqfd = | |
9366 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
9367 | ||
87276880 FW |
9368 | WARN_ON(irqfd->producer != prod); |
9369 | irqfd->producer = NULL; | |
9370 | ||
9371 | /* | |
9372 | * When producer of consumer is unregistered, we change back to | |
9373 | * remapped mode, so we can re-use the current implementation | |
bb3541f1 | 9374 | * when the irq is masked/disabled or the consumer side (KVM |
87276880 FW |
9375 | * int this case doesn't want to receive the interrupts. |
9376 | */ | |
9377 | ret = kvm_x86_ops->update_pi_irte(irqfd->kvm, prod->irq, irqfd->gsi, 0); | |
9378 | if (ret) | |
9379 | printk(KERN_INFO "irq bypass consumer (token %p) unregistration" | |
9380 | " fails: %d\n", irqfd->consumer.token, ret); | |
9381 | } | |
9382 | ||
9383 | int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq, | |
9384 | uint32_t guest_irq, bool set) | |
9385 | { | |
9386 | if (!kvm_x86_ops->update_pi_irte) | |
9387 | return -EINVAL; | |
9388 | ||
9389 | return kvm_x86_ops->update_pi_irte(kvm, host_irq, guest_irq, set); | |
9390 | } | |
9391 | ||
52004014 FW |
9392 | bool kvm_vector_hashing_enabled(void) |
9393 | { | |
9394 | return vector_hashing; | |
9395 | } | |
9396 | EXPORT_SYMBOL_GPL(kvm_vector_hashing_enabled); | |
9397 | ||
229456fc | 9398 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
931c33b1 | 9399 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_fast_mmio); |
229456fc MT |
9400 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); |
9401 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
9402 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
9403 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 9404 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 9405 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 9406 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 9407 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 9408 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 9409 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
2e554e8d | 9410 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |
489223ed | 9411 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_write_tsc_offset); |
7b46268d | 9412 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ple_window); |
843e4330 | 9413 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pml_full); |
efc64404 | 9414 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pi_irte_update); |
18f40c53 SS |
9415 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_unaccelerated_access); |
9416 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_incomplete_ipi); |