1 // SPDX-License-Identifier: GPL-2.0-only
3 * Kernel-based Virtual Machine driver for Linux
5 * derived from drivers/kvm/kvm_main.c
7 * Copyright (C) 2006 Qumranet, Inc.
8 * Copyright (C) 2008 Qumranet, Inc.
9 * Copyright IBM Corporation, 2008
10 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
13 * Avi Kivity <avi@qumranet.com>
14 * Yaniv Kamay <yaniv@qumranet.com>
15 * Amit Shah <amit.shah@qumranet.com>
16 * Ben-Ami Yassour <benami@il.ibm.com>
19 #include <linux/kvm_host.h>
25 #include "kvm_cache_regs.h"
26 #include "kvm_emulate.h"
33 #include <linux/clocksource.h>
34 #include <linux/interrupt.h>
35 #include <linux/kvm.h>
37 #include <linux/vmalloc.h>
38 #include <linux/export.h>
39 #include <linux/moduleparam.h>
40 #include <linux/mman.h>
41 #include <linux/highmem.h>
42 #include <linux/iommu.h>
43 #include <linux/intel-iommu.h>
44 #include <linux/cpufreq.h>
45 #include <linux/user-return-notifier.h>
46 #include <linux/srcu.h>
47 #include <linux/slab.h>
48 #include <linux/perf_event.h>
49 #include <linux/uaccess.h>
50 #include <linux/hash.h>
51 #include <linux/pci.h>
52 #include <linux/timekeeper_internal.h>
53 #include <linux/pvclock_gtod.h>
54 #include <linux/kvm_irqfd.h>
55 #include <linux/irqbypass.h>
56 #include <linux/sched/stat.h>
57 #include <linux/sched/isolation.h>
58 #include <linux/mem_encrypt.h>
59 #include <linux/entry-kvm.h>
61 #include <trace/events/kvm.h>
63 #include <asm/debugreg.h>
67 #include <linux/kernel_stat.h>
68 #include <asm/fpu/internal.h> /* Ugh! */
69 #include <asm/pvclock.h>
70 #include <asm/div64.h>
71 #include <asm/irq_remapping.h>
72 #include <asm/mshyperv.h>
73 #include <asm/hypervisor.h>
74 #include <asm/tlbflush.h>
75 #include <asm/intel_pt.h>
76 #include <asm/emulate_prefix.h>
77 #include <clocksource/hyperv_timer.h>
79 #define CREATE_TRACE_POINTS
82 #define MAX_IO_MSRS 256
83 #define KVM_MAX_MCE_BANKS 32
84 u64 __read_mostly kvm_mce_cap_supported
= MCG_CTL_P
| MCG_SER_P
;
85 EXPORT_SYMBOL_GPL(kvm_mce_cap_supported
);
87 #define emul_to_vcpu(ctxt) \
88 ((struct kvm_vcpu *)(ctxt)->vcpu)
91 * - enable syscall per default because its emulated by KVM
92 * - enable LME and LMA per default on 64 bit KVM
96 u64 __read_mostly efer_reserved_bits
= ~((u64
)(EFER_SCE
| EFER_LME
| EFER_LMA
));
98 static u64 __read_mostly efer_reserved_bits
= ~((u64
)EFER_SCE
);
101 static u64 __read_mostly cr4_reserved_bits
= CR4_RESERVED_BITS
;
103 #define KVM_X2APIC_API_VALID_FLAGS (KVM_X2APIC_API_USE_32BIT_IDS | \
104 KVM_X2APIC_API_DISABLE_BROADCAST_QUIRK)
106 static void update_cr8_intercept(struct kvm_vcpu
*vcpu
);
107 static void process_nmi(struct kvm_vcpu
*vcpu
);
108 static void process_smi(struct kvm_vcpu
*vcpu
);
109 static void enter_smm(struct kvm_vcpu
*vcpu
);
110 static void __kvm_set_rflags(struct kvm_vcpu
*vcpu
, unsigned long rflags
);
111 static void store_regs(struct kvm_vcpu
*vcpu
);
112 static int sync_regs(struct kvm_vcpu
*vcpu
);
114 struct kvm_x86_ops kvm_x86_ops __read_mostly
;
115 EXPORT_SYMBOL_GPL(kvm_x86_ops
);
117 static bool __read_mostly ignore_msrs
= 0;
118 module_param(ignore_msrs
, bool, S_IRUGO
| S_IWUSR
);
120 static bool __read_mostly report_ignored_msrs
= true;
121 module_param(report_ignored_msrs
, bool, S_IRUGO
| S_IWUSR
);
123 unsigned int min_timer_period_us
= 200;
124 module_param(min_timer_period_us
, uint
, S_IRUGO
| S_IWUSR
);
126 static bool __read_mostly kvmclock_periodic_sync
= true;
127 module_param(kvmclock_periodic_sync
, bool, S_IRUGO
);
129 bool __read_mostly kvm_has_tsc_control
;
130 EXPORT_SYMBOL_GPL(kvm_has_tsc_control
);
131 u32 __read_mostly kvm_max_guest_tsc_khz
;
132 EXPORT_SYMBOL_GPL(kvm_max_guest_tsc_khz
);
133 u8 __read_mostly kvm_tsc_scaling_ratio_frac_bits
;
134 EXPORT_SYMBOL_GPL(kvm_tsc_scaling_ratio_frac_bits
);
135 u64 __read_mostly kvm_max_tsc_scaling_ratio
;
136 EXPORT_SYMBOL_GPL(kvm_max_tsc_scaling_ratio
);
137 u64 __read_mostly kvm_default_tsc_scaling_ratio
;
138 EXPORT_SYMBOL_GPL(kvm_default_tsc_scaling_ratio
);
140 /* tsc tolerance in parts per million - default to 1/2 of the NTP threshold */
141 static u32 __read_mostly tsc_tolerance_ppm
= 250;
142 module_param(tsc_tolerance_ppm
, uint
, S_IRUGO
| S_IWUSR
);
145 * lapic timer advance (tscdeadline mode only) in nanoseconds. '-1' enables
146 * adaptive tuning starting from default advancment of 1000ns. '0' disables
147 * advancement entirely. Any other value is used as-is and disables adaptive
148 * tuning, i.e. allows priveleged userspace to set an exact advancement time.
150 static int __read_mostly lapic_timer_advance_ns
= -1;
151 module_param(lapic_timer_advance_ns
, int, S_IRUGO
| S_IWUSR
);
153 static bool __read_mostly vector_hashing
= true;
154 module_param(vector_hashing
, bool, S_IRUGO
);
156 bool __read_mostly enable_vmware_backdoor
= false;
157 module_param(enable_vmware_backdoor
, bool, S_IRUGO
);
158 EXPORT_SYMBOL_GPL(enable_vmware_backdoor
);
160 static bool __read_mostly force_emulation_prefix
= false;
161 module_param(force_emulation_prefix
, bool, S_IRUGO
);
163 int __read_mostly pi_inject_timer
= -1;
164 module_param(pi_inject_timer
, bint
, S_IRUGO
| S_IWUSR
);
167 * Restoring the host value for MSRs that are only consumed when running in
168 * usermode, e.g. SYSCALL MSRs and TSC_AUX, can be deferred until the CPU
169 * returns to userspace, i.e. the kernel can run with the guest's value.
171 #define KVM_MAX_NR_USER_RETURN_MSRS 16
173 struct kvm_user_return_msrs_global
{
175 u32 msrs
[KVM_MAX_NR_USER_RETURN_MSRS
];
178 struct kvm_user_return_msrs
{
179 struct user_return_notifier urn
;
181 struct kvm_user_return_msr_values
{
184 } values
[KVM_MAX_NR_USER_RETURN_MSRS
];
187 static struct kvm_user_return_msrs_global __read_mostly user_return_msrs_global
;
188 static struct kvm_user_return_msrs __percpu
*user_return_msrs
;
190 #define KVM_SUPPORTED_XCR0 (XFEATURE_MASK_FP | XFEATURE_MASK_SSE \
191 | XFEATURE_MASK_YMM | XFEATURE_MASK_BNDREGS \
192 | XFEATURE_MASK_BNDCSR | XFEATURE_MASK_AVX512 \
193 | XFEATURE_MASK_PKRU)
195 u64 __read_mostly host_efer
;
196 EXPORT_SYMBOL_GPL(host_efer
);
198 bool __read_mostly allow_smaller_maxphyaddr
= 0;
199 EXPORT_SYMBOL_GPL(allow_smaller_maxphyaddr
);
201 u64 __read_mostly host_xss
;
202 EXPORT_SYMBOL_GPL(host_xss
);
203 u64 __read_mostly supported_xss
;
204 EXPORT_SYMBOL_GPL(supported_xss
);
206 struct kvm_stats_debugfs_item debugfs_entries
[] = {
207 VCPU_STAT("pf_fixed", pf_fixed
),
208 VCPU_STAT("pf_guest", pf_guest
),
209 VCPU_STAT("tlb_flush", tlb_flush
),
210 VCPU_STAT("invlpg", invlpg
),
211 VCPU_STAT("exits", exits
),
212 VCPU_STAT("io_exits", io_exits
),
213 VCPU_STAT("mmio_exits", mmio_exits
),
214 VCPU_STAT("signal_exits", signal_exits
),
215 VCPU_STAT("irq_window", irq_window_exits
),
216 VCPU_STAT("nmi_window", nmi_window_exits
),
217 VCPU_STAT("halt_exits", halt_exits
),
218 VCPU_STAT("halt_successful_poll", halt_successful_poll
),
219 VCPU_STAT("halt_attempted_poll", halt_attempted_poll
),
220 VCPU_STAT("halt_poll_invalid", halt_poll_invalid
),
221 VCPU_STAT("halt_wakeup", halt_wakeup
),
222 VCPU_STAT("hypercalls", hypercalls
),
223 VCPU_STAT("request_irq", request_irq_exits
),
224 VCPU_STAT("irq_exits", irq_exits
),
225 VCPU_STAT("host_state_reload", host_state_reload
),
226 VCPU_STAT("fpu_reload", fpu_reload
),
227 VCPU_STAT("insn_emulation", insn_emulation
),
228 VCPU_STAT("insn_emulation_fail", insn_emulation_fail
),
229 VCPU_STAT("irq_injections", irq_injections
),
230 VCPU_STAT("nmi_injections", nmi_injections
),
231 VCPU_STAT("req_event", req_event
),
232 VCPU_STAT("l1d_flush", l1d_flush
),
233 VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns
),
234 VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns
),
235 VM_STAT("mmu_shadow_zapped", mmu_shadow_zapped
),
236 VM_STAT("mmu_pte_write", mmu_pte_write
),
237 VM_STAT("mmu_pte_updated", mmu_pte_updated
),
238 VM_STAT("mmu_pde_zapped", mmu_pde_zapped
),
239 VM_STAT("mmu_flooded", mmu_flooded
),
240 VM_STAT("mmu_recycled", mmu_recycled
),
241 VM_STAT("mmu_cache_miss", mmu_cache_miss
),
242 VM_STAT("mmu_unsync", mmu_unsync
),
243 VM_STAT("remote_tlb_flush", remote_tlb_flush
),
244 VM_STAT("largepages", lpages
, .mode
= 0444),
245 VM_STAT("nx_largepages_splitted", nx_lpage_splits
, .mode
= 0444),
246 VM_STAT("max_mmu_page_hash_collisions", max_mmu_page_hash_collisions
),
250 u64 __read_mostly host_xcr0
;
251 u64 __read_mostly supported_xcr0
;
252 EXPORT_SYMBOL_GPL(supported_xcr0
);
254 static struct kmem_cache
*x86_fpu_cache
;
256 static struct kmem_cache
*x86_emulator_cache
;
259 * When called, it means the previous get/set msr reached an invalid msr.
260 * Return true if we want to ignore/silent this failed msr access.
262 static bool kvm_msr_ignored_check(struct kvm_vcpu
*vcpu
, u32 msr
,
263 u64 data
, bool write
)
265 const char *op
= write
? "wrmsr" : "rdmsr";
268 if (report_ignored_msrs
)
269 kvm_pr_unimpl("ignored %s: 0x%x data 0x%llx\n",
274 kvm_debug_ratelimited("unhandled %s: 0x%x data 0x%llx\n",
280 static struct kmem_cache
*kvm_alloc_emulator_cache(void)
282 unsigned int useroffset
= offsetof(struct x86_emulate_ctxt
, src
);
283 unsigned int size
= sizeof(struct x86_emulate_ctxt
);
285 return kmem_cache_create_usercopy("x86_emulator", size
,
286 __alignof__(struct x86_emulate_ctxt
),
287 SLAB_ACCOUNT
, useroffset
,
288 size
- useroffset
, NULL
);
291 static int emulator_fix_hypercall(struct x86_emulate_ctxt
*ctxt
);
293 static inline void kvm_async_pf_hash_reset(struct kvm_vcpu
*vcpu
)
296 for (i
= 0; i
< ASYNC_PF_PER_VCPU
; i
++)
297 vcpu
->arch
.apf
.gfns
[i
] = ~0;
300 static void kvm_on_user_return(struct user_return_notifier
*urn
)
303 struct kvm_user_return_msrs
*msrs
304 = container_of(urn
, struct kvm_user_return_msrs
, urn
);
305 struct kvm_user_return_msr_values
*values
;
309 * Disabling irqs at this point since the following code could be
310 * interrupted and executed through kvm_arch_hardware_disable()
312 local_irq_save(flags
);
313 if (msrs
->registered
) {
314 msrs
->registered
= false;
315 user_return_notifier_unregister(urn
);
317 local_irq_restore(flags
);
318 for (slot
= 0; slot
< user_return_msrs_global
.nr
; ++slot
) {
319 values
= &msrs
->values
[slot
];
320 if (values
->host
!= values
->curr
) {
321 wrmsrl(user_return_msrs_global
.msrs
[slot
], values
->host
);
322 values
->curr
= values
->host
;
327 void kvm_define_user_return_msr(unsigned slot
, u32 msr
)
329 BUG_ON(slot
>= KVM_MAX_NR_USER_RETURN_MSRS
);
330 user_return_msrs_global
.msrs
[slot
] = msr
;
331 if (slot
>= user_return_msrs_global
.nr
)
332 user_return_msrs_global
.nr
= slot
+ 1;
334 EXPORT_SYMBOL_GPL(kvm_define_user_return_msr
);
336 static void kvm_user_return_msr_cpu_online(void)
338 unsigned int cpu
= smp_processor_id();
339 struct kvm_user_return_msrs
*msrs
= per_cpu_ptr(user_return_msrs
, cpu
);
343 for (i
= 0; i
< user_return_msrs_global
.nr
; ++i
) {
344 rdmsrl_safe(user_return_msrs_global
.msrs
[i
], &value
);
345 msrs
->values
[i
].host
= value
;
346 msrs
->values
[i
].curr
= value
;
350 int kvm_set_user_return_msr(unsigned slot
, u64 value
, u64 mask
)
352 unsigned int cpu
= smp_processor_id();
353 struct kvm_user_return_msrs
*msrs
= per_cpu_ptr(user_return_msrs
, cpu
);
356 value
= (value
& mask
) | (msrs
->values
[slot
].host
& ~mask
);
357 if (value
== msrs
->values
[slot
].curr
)
359 err
= wrmsrl_safe(user_return_msrs_global
.msrs
[slot
], value
);
363 msrs
->values
[slot
].curr
= value
;
364 if (!msrs
->registered
) {
365 msrs
->urn
.on_user_return
= kvm_on_user_return
;
366 user_return_notifier_register(&msrs
->urn
);
367 msrs
->registered
= true;
371 EXPORT_SYMBOL_GPL(kvm_set_user_return_msr
);
373 static void drop_user_return_notifiers(void)
375 unsigned int cpu
= smp_processor_id();
376 struct kvm_user_return_msrs
*msrs
= per_cpu_ptr(user_return_msrs
, cpu
);
378 if (msrs
->registered
)
379 kvm_on_user_return(&msrs
->urn
);
382 u64
kvm_get_apic_base(struct kvm_vcpu
*vcpu
)
384 return vcpu
->arch
.apic_base
;
386 EXPORT_SYMBOL_GPL(kvm_get_apic_base
);
388 enum lapic_mode
kvm_get_apic_mode(struct kvm_vcpu
*vcpu
)
390 return kvm_apic_mode(kvm_get_apic_base(vcpu
));
392 EXPORT_SYMBOL_GPL(kvm_get_apic_mode
);
394 int kvm_set_apic_base(struct kvm_vcpu
*vcpu
, struct msr_data
*msr_info
)
396 enum lapic_mode old_mode
= kvm_get_apic_mode(vcpu
);
397 enum lapic_mode new_mode
= kvm_apic_mode(msr_info
->data
);
398 u64 reserved_bits
= ((~0ULL) << cpuid_maxphyaddr(vcpu
)) | 0x2ff |
399 (guest_cpuid_has(vcpu
, X86_FEATURE_X2APIC
) ? 0 : X2APIC_ENABLE
);
401 if ((msr_info
->data
& reserved_bits
) != 0 || new_mode
== LAPIC_MODE_INVALID
)
403 if (!msr_info
->host_initiated
) {
404 if (old_mode
== LAPIC_MODE_X2APIC
&& new_mode
== LAPIC_MODE_XAPIC
)
406 if (old_mode
== LAPIC_MODE_DISABLED
&& new_mode
== LAPIC_MODE_X2APIC
)
410 kvm_lapic_set_base(vcpu
, msr_info
->data
);
411 kvm_recalculate_apic_map(vcpu
->kvm
);
414 EXPORT_SYMBOL_GPL(kvm_set_apic_base
);
416 asmlinkage __visible noinstr
void kvm_spurious_fault(void)
418 /* Fault while not rebooting. We want the trace. */
419 BUG_ON(!kvm_rebooting
);
421 EXPORT_SYMBOL_GPL(kvm_spurious_fault
);
423 #define EXCPT_BENIGN 0
424 #define EXCPT_CONTRIBUTORY 1
427 static int exception_class(int vector
)
437 return EXCPT_CONTRIBUTORY
;
444 #define EXCPT_FAULT 0
446 #define EXCPT_ABORT 2
447 #define EXCPT_INTERRUPT 3
449 static int exception_type(int vector
)
453 if (WARN_ON(vector
> 31 || vector
== NMI_VECTOR
))
454 return EXCPT_INTERRUPT
;
458 /* #DB is trap, as instruction watchpoints are handled elsewhere */
459 if (mask
& ((1 << DB_VECTOR
) | (1 << BP_VECTOR
) | (1 << OF_VECTOR
)))
462 if (mask
& ((1 << DF_VECTOR
) | (1 << MC_VECTOR
)))
465 /* Reserved exceptions will result in fault */
469 void kvm_deliver_exception_payload(struct kvm_vcpu
*vcpu
)
471 unsigned nr
= vcpu
->arch
.exception
.nr
;
472 bool has_payload
= vcpu
->arch
.exception
.has_payload
;
473 unsigned long payload
= vcpu
->arch
.exception
.payload
;
481 * "Certain debug exceptions may clear bit 0-3. The
482 * remaining contents of the DR6 register are never
483 * cleared by the processor".
485 vcpu
->arch
.dr6
&= ~DR_TRAP_BITS
;
487 * DR6.RTM is set by all #DB exceptions that don't clear it.
489 vcpu
->arch
.dr6
|= DR6_RTM
;
490 vcpu
->arch
.dr6
|= payload
;
492 * Bit 16 should be set in the payload whenever the #DB
493 * exception should clear DR6.RTM. This makes the payload
494 * compatible with the pending debug exceptions under VMX.
495 * Though not currently documented in the SDM, this also
496 * makes the payload compatible with the exit qualification
497 * for #DB exceptions under VMX.
499 vcpu
->arch
.dr6
^= payload
& DR6_RTM
;
502 * The #DB payload is defined as compatible with the 'pending
503 * debug exceptions' field under VMX, not DR6. While bit 12 is
504 * defined in the 'pending debug exceptions' field (enabled
505 * breakpoint), it is reserved and must be zero in DR6.
507 vcpu
->arch
.dr6
&= ~BIT(12);
510 vcpu
->arch
.cr2
= payload
;
514 vcpu
->arch
.exception
.has_payload
= false;
515 vcpu
->arch
.exception
.payload
= 0;
517 EXPORT_SYMBOL_GPL(kvm_deliver_exception_payload
);
519 static void kvm_multiple_exception(struct kvm_vcpu
*vcpu
,
520 unsigned nr
, bool has_error
, u32 error_code
,
521 bool has_payload
, unsigned long payload
, bool reinject
)
526 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
528 if (!vcpu
->arch
.exception
.pending
&& !vcpu
->arch
.exception
.injected
) {
530 if (has_error
&& !is_protmode(vcpu
))
534 * On vmentry, vcpu->arch.exception.pending is only
535 * true if an event injection was blocked by
536 * nested_run_pending. In that case, however,
537 * vcpu_enter_guest requests an immediate exit,
538 * and the guest shouldn't proceed far enough to
541 WARN_ON_ONCE(vcpu
->arch
.exception
.pending
);
542 vcpu
->arch
.exception
.injected
= true;
543 if (WARN_ON_ONCE(has_payload
)) {
545 * A reinjected event has already
546 * delivered its payload.
552 vcpu
->arch
.exception
.pending
= true;
553 vcpu
->arch
.exception
.injected
= false;
555 vcpu
->arch
.exception
.has_error_code
= has_error
;
556 vcpu
->arch
.exception
.nr
= nr
;
557 vcpu
->arch
.exception
.error_code
= error_code
;
558 vcpu
->arch
.exception
.has_payload
= has_payload
;
559 vcpu
->arch
.exception
.payload
= payload
;
560 if (!is_guest_mode(vcpu
))
561 kvm_deliver_exception_payload(vcpu
);
565 /* to check exception */
566 prev_nr
= vcpu
->arch
.exception
.nr
;
567 if (prev_nr
== DF_VECTOR
) {
568 /* triple fault -> shutdown */
569 kvm_make_request(KVM_REQ_TRIPLE_FAULT
, vcpu
);
572 class1
= exception_class(prev_nr
);
573 class2
= exception_class(nr
);
574 if ((class1
== EXCPT_CONTRIBUTORY
&& class2
== EXCPT_CONTRIBUTORY
)
575 || (class1
== EXCPT_PF
&& class2
!= EXCPT_BENIGN
)) {
577 * Generate double fault per SDM Table 5-5. Set
578 * exception.pending = true so that the double fault
579 * can trigger a nested vmexit.
581 vcpu
->arch
.exception
.pending
= true;
582 vcpu
->arch
.exception
.injected
= false;
583 vcpu
->arch
.exception
.has_error_code
= true;
584 vcpu
->arch
.exception
.nr
= DF_VECTOR
;
585 vcpu
->arch
.exception
.error_code
= 0;
586 vcpu
->arch
.exception
.has_payload
= false;
587 vcpu
->arch
.exception
.payload
= 0;
589 /* replace previous exception with a new one in a hope
590 that instruction re-execution will regenerate lost
595 void kvm_queue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
)
597 kvm_multiple_exception(vcpu
, nr
, false, 0, false, 0, false);
599 EXPORT_SYMBOL_GPL(kvm_queue_exception
);
601 void kvm_requeue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
)
603 kvm_multiple_exception(vcpu
, nr
, false, 0, false, 0, true);
605 EXPORT_SYMBOL_GPL(kvm_requeue_exception
);
607 void kvm_queue_exception_p(struct kvm_vcpu
*vcpu
, unsigned nr
,
608 unsigned long payload
)
610 kvm_multiple_exception(vcpu
, nr
, false, 0, true, payload
, false);
612 EXPORT_SYMBOL_GPL(kvm_queue_exception_p
);
614 static void kvm_queue_exception_e_p(struct kvm_vcpu
*vcpu
, unsigned nr
,
615 u32 error_code
, unsigned long payload
)
617 kvm_multiple_exception(vcpu
, nr
, true, error_code
,
618 true, payload
, false);
621 int kvm_complete_insn_gp(struct kvm_vcpu
*vcpu
, int err
)
624 kvm_inject_gp(vcpu
, 0);
626 return kvm_skip_emulated_instruction(vcpu
);
630 EXPORT_SYMBOL_GPL(kvm_complete_insn_gp
);
632 void kvm_inject_page_fault(struct kvm_vcpu
*vcpu
, struct x86_exception
*fault
)
634 ++vcpu
->stat
.pf_guest
;
635 vcpu
->arch
.exception
.nested_apf
=
636 is_guest_mode(vcpu
) && fault
->async_page_fault
;
637 if (vcpu
->arch
.exception
.nested_apf
) {
638 vcpu
->arch
.apf
.nested_apf_token
= fault
->address
;
639 kvm_queue_exception_e(vcpu
, PF_VECTOR
, fault
->error_code
);
641 kvm_queue_exception_e_p(vcpu
, PF_VECTOR
, fault
->error_code
,
645 EXPORT_SYMBOL_GPL(kvm_inject_page_fault
);
647 bool kvm_inject_emulated_page_fault(struct kvm_vcpu
*vcpu
,
648 struct x86_exception
*fault
)
650 struct kvm_mmu
*fault_mmu
;
651 WARN_ON_ONCE(fault
->vector
!= PF_VECTOR
);
653 fault_mmu
= fault
->nested_page_fault
? vcpu
->arch
.mmu
:
657 * Invalidate the TLB entry for the faulting address, if it exists,
658 * else the access will fault indefinitely (and to emulate hardware).
660 if ((fault
->error_code
& PFERR_PRESENT_MASK
) &&
661 !(fault
->error_code
& PFERR_RSVD_MASK
))
662 kvm_mmu_invalidate_gva(vcpu
, fault_mmu
, fault
->address
,
663 fault_mmu
->root_hpa
);
665 fault_mmu
->inject_page_fault(vcpu
, fault
);
666 return fault
->nested_page_fault
;
668 EXPORT_SYMBOL_GPL(kvm_inject_emulated_page_fault
);
670 void kvm_inject_nmi(struct kvm_vcpu
*vcpu
)
672 atomic_inc(&vcpu
->arch
.nmi_queued
);
673 kvm_make_request(KVM_REQ_NMI
, vcpu
);
675 EXPORT_SYMBOL_GPL(kvm_inject_nmi
);
677 void kvm_queue_exception_e(struct kvm_vcpu
*vcpu
, unsigned nr
, u32 error_code
)
679 kvm_multiple_exception(vcpu
, nr
, true, error_code
, false, 0, false);
681 EXPORT_SYMBOL_GPL(kvm_queue_exception_e
);
683 void kvm_requeue_exception_e(struct kvm_vcpu
*vcpu
, unsigned nr
, u32 error_code
)
685 kvm_multiple_exception(vcpu
, nr
, true, error_code
, false, 0, true);
687 EXPORT_SYMBOL_GPL(kvm_requeue_exception_e
);
690 * Checks if cpl <= required_cpl; if true, return true. Otherwise queue
691 * a #GP and return false.
693 bool kvm_require_cpl(struct kvm_vcpu
*vcpu
, int required_cpl
)
695 if (kvm_x86_ops
.get_cpl(vcpu
) <= required_cpl
)
697 kvm_queue_exception_e(vcpu
, GP_VECTOR
, 0);
700 EXPORT_SYMBOL_GPL(kvm_require_cpl
);
702 bool kvm_require_dr(struct kvm_vcpu
*vcpu
, int dr
)
704 if ((dr
!= 4 && dr
!= 5) || !kvm_read_cr4_bits(vcpu
, X86_CR4_DE
))
707 kvm_queue_exception(vcpu
, UD_VECTOR
);
710 EXPORT_SYMBOL_GPL(kvm_require_dr
);
713 * This function will be used to read from the physical memory of the currently
714 * running guest. The difference to kvm_vcpu_read_guest_page is that this function
715 * can read from guest physical or from the guest's guest physical memory.
717 int kvm_read_guest_page_mmu(struct kvm_vcpu
*vcpu
, struct kvm_mmu
*mmu
,
718 gfn_t ngfn
, void *data
, int offset
, int len
,
721 struct x86_exception exception
;
725 ngpa
= gfn_to_gpa(ngfn
);
726 real_gfn
= mmu
->translate_gpa(vcpu
, ngpa
, access
, &exception
);
727 if (real_gfn
== UNMAPPED_GVA
)
730 real_gfn
= gpa_to_gfn(real_gfn
);
732 return kvm_vcpu_read_guest_page(vcpu
, real_gfn
, data
, offset
, len
);
734 EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu
);
736 static int kvm_read_nested_guest_page(struct kvm_vcpu
*vcpu
, gfn_t gfn
,
737 void *data
, int offset
, int len
, u32 access
)
739 return kvm_read_guest_page_mmu(vcpu
, vcpu
->arch
.walk_mmu
, gfn
,
740 data
, offset
, len
, access
);
743 static inline u64
pdptr_rsvd_bits(struct kvm_vcpu
*vcpu
)
745 return rsvd_bits(cpuid_maxphyaddr(vcpu
), 63) | rsvd_bits(5, 8) |
750 * Load the pae pdptrs. Return 1 if they are all valid, 0 otherwise.
752 int load_pdptrs(struct kvm_vcpu
*vcpu
, struct kvm_mmu
*mmu
, unsigned long cr3
)
754 gfn_t pdpt_gfn
= cr3
>> PAGE_SHIFT
;
755 unsigned offset
= ((cr3
& (PAGE_SIZE
-1)) >> 5) << 2;
758 u64 pdpte
[ARRAY_SIZE(mmu
->pdptrs
)];
760 ret
= kvm_read_guest_page_mmu(vcpu
, mmu
, pdpt_gfn
, pdpte
,
761 offset
* sizeof(u64
), sizeof(pdpte
),
762 PFERR_USER_MASK
|PFERR_WRITE_MASK
);
767 for (i
= 0; i
< ARRAY_SIZE(pdpte
); ++i
) {
768 if ((pdpte
[i
] & PT_PRESENT_MASK
) &&
769 (pdpte
[i
] & pdptr_rsvd_bits(vcpu
))) {
776 memcpy(mmu
->pdptrs
, pdpte
, sizeof(mmu
->pdptrs
));
777 kvm_register_mark_dirty(vcpu
, VCPU_EXREG_PDPTR
);
783 EXPORT_SYMBOL_GPL(load_pdptrs
);
785 bool pdptrs_changed(struct kvm_vcpu
*vcpu
)
787 u64 pdpte
[ARRAY_SIZE(vcpu
->arch
.walk_mmu
->pdptrs
)];
792 if (!is_pae_paging(vcpu
))
795 if (!kvm_register_is_available(vcpu
, VCPU_EXREG_PDPTR
))
798 gfn
= (kvm_read_cr3(vcpu
) & 0xffffffe0ul
) >> PAGE_SHIFT
;
799 offset
= (kvm_read_cr3(vcpu
) & 0xffffffe0ul
) & (PAGE_SIZE
- 1);
800 r
= kvm_read_nested_guest_page(vcpu
, gfn
, pdpte
, offset
, sizeof(pdpte
),
801 PFERR_USER_MASK
| PFERR_WRITE_MASK
);
805 return memcmp(pdpte
, vcpu
->arch
.walk_mmu
->pdptrs
, sizeof(pdpte
)) != 0;
807 EXPORT_SYMBOL_GPL(pdptrs_changed
);
809 void kvm_post_set_cr0(struct kvm_vcpu
*vcpu
, unsigned long old_cr0
, unsigned long cr0
)
811 unsigned long update_bits
= X86_CR0_PG
| X86_CR0_WP
;
813 if ((cr0
^ old_cr0
) & X86_CR0_PG
) {
814 kvm_clear_async_pf_completion_queue(vcpu
);
815 kvm_async_pf_hash_reset(vcpu
);
818 if ((cr0
^ old_cr0
) & update_bits
)
819 kvm_mmu_reset_context(vcpu
);
821 if (((cr0
^ old_cr0
) & X86_CR0_CD
) &&
822 kvm_arch_has_noncoherent_dma(vcpu
->kvm
) &&
823 !kvm_check_has_quirk(vcpu
->kvm
, KVM_X86_QUIRK_CD_NW_CLEARED
))
824 kvm_zap_gfn_range(vcpu
->kvm
, 0, ~0ULL);
826 EXPORT_SYMBOL_GPL(kvm_post_set_cr0
);
828 int kvm_set_cr0(struct kvm_vcpu
*vcpu
, unsigned long cr0
)
830 unsigned long old_cr0
= kvm_read_cr0(vcpu
);
831 unsigned long pdptr_bits
= X86_CR0_CD
| X86_CR0_NW
| X86_CR0_PG
;
836 if (cr0
& 0xffffffff00000000UL
)
840 cr0
&= ~CR0_RESERVED_BITS
;
842 if ((cr0
& X86_CR0_NW
) && !(cr0
& X86_CR0_CD
))
845 if ((cr0
& X86_CR0_PG
) && !(cr0
& X86_CR0_PE
))
849 if ((vcpu
->arch
.efer
& EFER_LME
) && !is_paging(vcpu
) &&
850 (cr0
& X86_CR0_PG
)) {
855 kvm_x86_ops
.get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
860 if (!(vcpu
->arch
.efer
& EFER_LME
) && (cr0
& X86_CR0_PG
) &&
861 is_pae(vcpu
) && ((cr0
^ old_cr0
) & pdptr_bits
) &&
862 !load_pdptrs(vcpu
, vcpu
->arch
.walk_mmu
, kvm_read_cr3(vcpu
)))
865 if (!(cr0
& X86_CR0_PG
) && kvm_read_cr4_bits(vcpu
, X86_CR4_PCIDE
))
868 kvm_x86_ops
.set_cr0(vcpu
, cr0
);
870 kvm_post_set_cr0(vcpu
, old_cr0
, cr0
);
874 EXPORT_SYMBOL_GPL(kvm_set_cr0
);
876 void kvm_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
)
878 (void)kvm_set_cr0(vcpu
, kvm_read_cr0_bits(vcpu
, ~0x0eul
) | (msw
& 0x0f));
880 EXPORT_SYMBOL_GPL(kvm_lmsw
);
882 void kvm_load_guest_xsave_state(struct kvm_vcpu
*vcpu
)
884 if (vcpu
->arch
.guest_state_protected
)
887 if (kvm_read_cr4_bits(vcpu
, X86_CR4_OSXSAVE
)) {
889 if (vcpu
->arch
.xcr0
!= host_xcr0
)
890 xsetbv(XCR_XFEATURE_ENABLED_MASK
, vcpu
->arch
.xcr0
);
892 if (vcpu
->arch
.xsaves_enabled
&&
893 vcpu
->arch
.ia32_xss
!= host_xss
)
894 wrmsrl(MSR_IA32_XSS
, vcpu
->arch
.ia32_xss
);
897 if (static_cpu_has(X86_FEATURE_PKU
) &&
898 (kvm_read_cr4_bits(vcpu
, X86_CR4_PKE
) ||
899 (vcpu
->arch
.xcr0
& XFEATURE_MASK_PKRU
)) &&
900 vcpu
->arch
.pkru
!= vcpu
->arch
.host_pkru
)
901 __write_pkru(vcpu
->arch
.pkru
);
903 EXPORT_SYMBOL_GPL(kvm_load_guest_xsave_state
);
905 void kvm_load_host_xsave_state(struct kvm_vcpu
*vcpu
)
907 if (vcpu
->arch
.guest_state_protected
)
910 if (static_cpu_has(X86_FEATURE_PKU
) &&
911 (kvm_read_cr4_bits(vcpu
, X86_CR4_PKE
) ||
912 (vcpu
->arch
.xcr0
& XFEATURE_MASK_PKRU
))) {
913 vcpu
->arch
.pkru
= rdpkru();
914 if (vcpu
->arch
.pkru
!= vcpu
->arch
.host_pkru
)
915 __write_pkru(vcpu
->arch
.host_pkru
);
918 if (kvm_read_cr4_bits(vcpu
, X86_CR4_OSXSAVE
)) {
920 if (vcpu
->arch
.xcr0
!= host_xcr0
)
921 xsetbv(XCR_XFEATURE_ENABLED_MASK
, host_xcr0
);
923 if (vcpu
->arch
.xsaves_enabled
&&
924 vcpu
->arch
.ia32_xss
!= host_xss
)
925 wrmsrl(MSR_IA32_XSS
, host_xss
);
929 EXPORT_SYMBOL_GPL(kvm_load_host_xsave_state
);
931 static int __kvm_set_xcr(struct kvm_vcpu
*vcpu
, u32 index
, u64 xcr
)
934 u64 old_xcr0
= vcpu
->arch
.xcr0
;
937 /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */
938 if (index
!= XCR_XFEATURE_ENABLED_MASK
)
940 if (!(xcr0
& XFEATURE_MASK_FP
))
942 if ((xcr0
& XFEATURE_MASK_YMM
) && !(xcr0
& XFEATURE_MASK_SSE
))
946 * Do not allow the guest to set bits that we do not support
947 * saving. However, xcr0 bit 0 is always set, even if the
948 * emulated CPU does not support XSAVE (see fx_init).
950 valid_bits
= vcpu
->arch
.guest_supported_xcr0
| XFEATURE_MASK_FP
;
951 if (xcr0
& ~valid_bits
)
954 if ((!(xcr0
& XFEATURE_MASK_BNDREGS
)) !=
955 (!(xcr0
& XFEATURE_MASK_BNDCSR
)))
958 if (xcr0
& XFEATURE_MASK_AVX512
) {
959 if (!(xcr0
& XFEATURE_MASK_YMM
))
961 if ((xcr0
& XFEATURE_MASK_AVX512
) != XFEATURE_MASK_AVX512
)
964 vcpu
->arch
.xcr0
= xcr0
;
966 if ((xcr0
^ old_xcr0
) & XFEATURE_MASK_EXTEND
)
967 kvm_update_cpuid_runtime(vcpu
);
971 int kvm_set_xcr(struct kvm_vcpu
*vcpu
, u32 index
, u64 xcr
)
973 if (kvm_x86_ops
.get_cpl(vcpu
) != 0 ||
974 __kvm_set_xcr(vcpu
, index
, xcr
)) {
975 kvm_inject_gp(vcpu
, 0);
980 EXPORT_SYMBOL_GPL(kvm_set_xcr
);
982 bool kvm_is_valid_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
)
984 if (cr4
& cr4_reserved_bits
)
987 if (cr4
& vcpu
->arch
.cr4_guest_rsvd_bits
)
990 return kvm_x86_ops
.is_valid_cr4(vcpu
, cr4
);
992 EXPORT_SYMBOL_GPL(kvm_is_valid_cr4
);
994 void kvm_post_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long old_cr4
, unsigned long cr4
)
996 unsigned long mmu_role_bits
= X86_CR4_PGE
| X86_CR4_PSE
| X86_CR4_PAE
|
997 X86_CR4_SMEP
| X86_CR4_SMAP
| X86_CR4_PKE
;
999 if (((cr4
^ old_cr4
) & mmu_role_bits
) ||
1000 (!(cr4
& X86_CR4_PCIDE
) && (old_cr4
& X86_CR4_PCIDE
)))
1001 kvm_mmu_reset_context(vcpu
);
1003 EXPORT_SYMBOL_GPL(kvm_post_set_cr4
);
1005 int kvm_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
)
1007 unsigned long old_cr4
= kvm_read_cr4(vcpu
);
1008 unsigned long pdptr_bits
= X86_CR4_PGE
| X86_CR4_PSE
| X86_CR4_PAE
|
1011 if (!kvm_is_valid_cr4(vcpu
, cr4
))
1014 if (is_long_mode(vcpu
)) {
1015 if (!(cr4
& X86_CR4_PAE
))
1017 if ((cr4
^ old_cr4
) & X86_CR4_LA57
)
1019 } else if (is_paging(vcpu
) && (cr4
& X86_CR4_PAE
)
1020 && ((cr4
^ old_cr4
) & pdptr_bits
)
1021 && !load_pdptrs(vcpu
, vcpu
->arch
.walk_mmu
,
1022 kvm_read_cr3(vcpu
)))
1025 if ((cr4
& X86_CR4_PCIDE
) && !(old_cr4
& X86_CR4_PCIDE
)) {
1026 if (!guest_cpuid_has(vcpu
, X86_FEATURE_PCID
))
1029 /* PCID can not be enabled when cr3[11:0]!=000H or EFER.LMA=0 */
1030 if ((kvm_read_cr3(vcpu
) & X86_CR3_PCID_MASK
) || !is_long_mode(vcpu
))
1034 kvm_x86_ops
.set_cr4(vcpu
, cr4
);
1036 kvm_post_set_cr4(vcpu
, old_cr4
, cr4
);
1040 EXPORT_SYMBOL_GPL(kvm_set_cr4
);
1042 int kvm_set_cr3(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
1044 bool skip_tlb_flush
= false;
1045 #ifdef CONFIG_X86_64
1046 bool pcid_enabled
= kvm_read_cr4_bits(vcpu
, X86_CR4_PCIDE
);
1049 skip_tlb_flush
= cr3
& X86_CR3_PCID_NOFLUSH
;
1050 cr3
&= ~X86_CR3_PCID_NOFLUSH
;
1054 if (cr3
== kvm_read_cr3(vcpu
) && !pdptrs_changed(vcpu
)) {
1055 if (!skip_tlb_flush
) {
1056 kvm_mmu_sync_roots(vcpu
);
1057 kvm_make_request(KVM_REQ_TLB_FLUSH_CURRENT
, vcpu
);
1062 if (is_long_mode(vcpu
) &&
1063 (cr3
& vcpu
->arch
.cr3_lm_rsvd_bits
))
1065 else if (is_pae_paging(vcpu
) &&
1066 !load_pdptrs(vcpu
, vcpu
->arch
.walk_mmu
, cr3
))
1069 kvm_mmu_new_pgd(vcpu
, cr3
, skip_tlb_flush
, skip_tlb_flush
);
1070 vcpu
->arch
.cr3
= cr3
;
1071 kvm_register_mark_available(vcpu
, VCPU_EXREG_CR3
);
1075 EXPORT_SYMBOL_GPL(kvm_set_cr3
);
1077 int kvm_set_cr8(struct kvm_vcpu
*vcpu
, unsigned long cr8
)
1079 if (cr8
& CR8_RESERVED_BITS
)
1081 if (lapic_in_kernel(vcpu
))
1082 kvm_lapic_set_tpr(vcpu
, cr8
);
1084 vcpu
->arch
.cr8
= cr8
;
1087 EXPORT_SYMBOL_GPL(kvm_set_cr8
);
1089 unsigned long kvm_get_cr8(struct kvm_vcpu
*vcpu
)
1091 if (lapic_in_kernel(vcpu
))
1092 return kvm_lapic_get_cr8(vcpu
);
1094 return vcpu
->arch
.cr8
;
1096 EXPORT_SYMBOL_GPL(kvm_get_cr8
);
1098 static void kvm_update_dr0123(struct kvm_vcpu
*vcpu
)
1102 if (!(vcpu
->guest_debug
& KVM_GUESTDBG_USE_HW_BP
)) {
1103 for (i
= 0; i
< KVM_NR_DB_REGS
; i
++)
1104 vcpu
->arch
.eff_db
[i
] = vcpu
->arch
.db
[i
];
1105 vcpu
->arch
.switch_db_regs
|= KVM_DEBUGREG_RELOAD
;
1109 void kvm_update_dr7(struct kvm_vcpu
*vcpu
)
1113 if (vcpu
->guest_debug
& KVM_GUESTDBG_USE_HW_BP
)
1114 dr7
= vcpu
->arch
.guest_debug_dr7
;
1116 dr7
= vcpu
->arch
.dr7
;
1117 kvm_x86_ops
.set_dr7(vcpu
, dr7
);
1118 vcpu
->arch
.switch_db_regs
&= ~KVM_DEBUGREG_BP_ENABLED
;
1119 if (dr7
& DR7_BP_EN_MASK
)
1120 vcpu
->arch
.switch_db_regs
|= KVM_DEBUGREG_BP_ENABLED
;
1122 EXPORT_SYMBOL_GPL(kvm_update_dr7
);
1124 static u64
kvm_dr6_fixed(struct kvm_vcpu
*vcpu
)
1126 u64 fixed
= DR6_FIXED_1
;
1128 if (!guest_cpuid_has(vcpu
, X86_FEATURE_RTM
))
1133 static int __kvm_set_dr(struct kvm_vcpu
*vcpu
, int dr
, unsigned long val
)
1135 size_t size
= ARRAY_SIZE(vcpu
->arch
.db
);
1139 vcpu
->arch
.db
[array_index_nospec(dr
, size
)] = val
;
1140 if (!(vcpu
->guest_debug
& KVM_GUESTDBG_USE_HW_BP
))
1141 vcpu
->arch
.eff_db
[dr
] = val
;
1145 if (!kvm_dr6_valid(val
))
1146 return -1; /* #GP */
1147 vcpu
->arch
.dr6
= (val
& DR6_VOLATILE
) | kvm_dr6_fixed(vcpu
);
1151 if (!kvm_dr7_valid(val
))
1152 return -1; /* #GP */
1153 vcpu
->arch
.dr7
= (val
& DR7_VOLATILE
) | DR7_FIXED_1
;
1154 kvm_update_dr7(vcpu
);
1161 int kvm_set_dr(struct kvm_vcpu
*vcpu
, int dr
, unsigned long val
)
1163 if (__kvm_set_dr(vcpu
, dr
, val
)) {
1164 kvm_inject_gp(vcpu
, 0);
1169 EXPORT_SYMBOL_GPL(kvm_set_dr
);
1171 int kvm_get_dr(struct kvm_vcpu
*vcpu
, int dr
, unsigned long *val
)
1173 size_t size
= ARRAY_SIZE(vcpu
->arch
.db
);
1177 *val
= vcpu
->arch
.db
[array_index_nospec(dr
, size
)];
1181 *val
= vcpu
->arch
.dr6
;
1185 *val
= vcpu
->arch
.dr7
;
1190 EXPORT_SYMBOL_GPL(kvm_get_dr
);
1192 bool kvm_rdpmc(struct kvm_vcpu
*vcpu
)
1194 u32 ecx
= kvm_rcx_read(vcpu
);
1198 err
= kvm_pmu_rdpmc(vcpu
, ecx
, &data
);
1201 kvm_rax_write(vcpu
, (u32
)data
);
1202 kvm_rdx_write(vcpu
, data
>> 32);
1205 EXPORT_SYMBOL_GPL(kvm_rdpmc
);
1208 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
1209 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
1211 * The three MSR lists(msrs_to_save, emulated_msrs, msr_based_features)
1212 * extract the supported MSRs from the related const lists.
1213 * msrs_to_save is selected from the msrs_to_save_all to reflect the
1214 * capabilities of the host cpu. This capabilities test skips MSRs that are
1215 * kvm-specific. Those are put in emulated_msrs_all; filtering of emulated_msrs
1216 * may depend on host virtualization features rather than host cpu features.
1219 static const u32 msrs_to_save_all
[] = {
1220 MSR_IA32_SYSENTER_CS
, MSR_IA32_SYSENTER_ESP
, MSR_IA32_SYSENTER_EIP
,
1222 #ifdef CONFIG_X86_64
1223 MSR_CSTAR
, MSR_KERNEL_GS_BASE
, MSR_SYSCALL_MASK
, MSR_LSTAR
,
1225 MSR_IA32_TSC
, MSR_IA32_CR_PAT
, MSR_VM_HSAVE_PA
,
1226 MSR_IA32_FEAT_CTL
, MSR_IA32_BNDCFGS
, MSR_TSC_AUX
,
1228 MSR_IA32_RTIT_CTL
, MSR_IA32_RTIT_STATUS
, MSR_IA32_RTIT_CR3_MATCH
,
1229 MSR_IA32_RTIT_OUTPUT_BASE
, MSR_IA32_RTIT_OUTPUT_MASK
,
1230 MSR_IA32_RTIT_ADDR0_A
, MSR_IA32_RTIT_ADDR0_B
,
1231 MSR_IA32_RTIT_ADDR1_A
, MSR_IA32_RTIT_ADDR1_B
,
1232 MSR_IA32_RTIT_ADDR2_A
, MSR_IA32_RTIT_ADDR2_B
,
1233 MSR_IA32_RTIT_ADDR3_A
, MSR_IA32_RTIT_ADDR3_B
,
1234 MSR_IA32_UMWAIT_CONTROL
,
1236 MSR_ARCH_PERFMON_FIXED_CTR0
, MSR_ARCH_PERFMON_FIXED_CTR1
,
1237 MSR_ARCH_PERFMON_FIXED_CTR0
+ 2, MSR_ARCH_PERFMON_FIXED_CTR0
+ 3,
1238 MSR_CORE_PERF_FIXED_CTR_CTRL
, MSR_CORE_PERF_GLOBAL_STATUS
,
1239 MSR_CORE_PERF_GLOBAL_CTRL
, MSR_CORE_PERF_GLOBAL_OVF_CTRL
,
1240 MSR_ARCH_PERFMON_PERFCTR0
, MSR_ARCH_PERFMON_PERFCTR1
,
1241 MSR_ARCH_PERFMON_PERFCTR0
+ 2, MSR_ARCH_PERFMON_PERFCTR0
+ 3,
1242 MSR_ARCH_PERFMON_PERFCTR0
+ 4, MSR_ARCH_PERFMON_PERFCTR0
+ 5,
1243 MSR_ARCH_PERFMON_PERFCTR0
+ 6, MSR_ARCH_PERFMON_PERFCTR0
+ 7,
1244 MSR_ARCH_PERFMON_PERFCTR0
+ 8, MSR_ARCH_PERFMON_PERFCTR0
+ 9,
1245 MSR_ARCH_PERFMON_PERFCTR0
+ 10, MSR_ARCH_PERFMON_PERFCTR0
+ 11,
1246 MSR_ARCH_PERFMON_PERFCTR0
+ 12, MSR_ARCH_PERFMON_PERFCTR0
+ 13,
1247 MSR_ARCH_PERFMON_PERFCTR0
+ 14, MSR_ARCH_PERFMON_PERFCTR0
+ 15,
1248 MSR_ARCH_PERFMON_PERFCTR0
+ 16, MSR_ARCH_PERFMON_PERFCTR0
+ 17,
1249 MSR_ARCH_PERFMON_EVENTSEL0
, MSR_ARCH_PERFMON_EVENTSEL1
,
1250 MSR_ARCH_PERFMON_EVENTSEL0
+ 2, MSR_ARCH_PERFMON_EVENTSEL0
+ 3,
1251 MSR_ARCH_PERFMON_EVENTSEL0
+ 4, MSR_ARCH_PERFMON_EVENTSEL0
+ 5,
1252 MSR_ARCH_PERFMON_EVENTSEL0
+ 6, MSR_ARCH_PERFMON_EVENTSEL0
+ 7,
1253 MSR_ARCH_PERFMON_EVENTSEL0
+ 8, MSR_ARCH_PERFMON_EVENTSEL0
+ 9,
1254 MSR_ARCH_PERFMON_EVENTSEL0
+ 10, MSR_ARCH_PERFMON_EVENTSEL0
+ 11,
1255 MSR_ARCH_PERFMON_EVENTSEL0
+ 12, MSR_ARCH_PERFMON_EVENTSEL0
+ 13,
1256 MSR_ARCH_PERFMON_EVENTSEL0
+ 14, MSR_ARCH_PERFMON_EVENTSEL0
+ 15,
1257 MSR_ARCH_PERFMON_EVENTSEL0
+ 16, MSR_ARCH_PERFMON_EVENTSEL0
+ 17,
1260 static u32 msrs_to_save
[ARRAY_SIZE(msrs_to_save_all
)];
1261 static unsigned num_msrs_to_save
;
1263 static const u32 emulated_msrs_all
[] = {
1264 MSR_KVM_SYSTEM_TIME
, MSR_KVM_WALL_CLOCK
,
1265 MSR_KVM_SYSTEM_TIME_NEW
, MSR_KVM_WALL_CLOCK_NEW
,
1266 HV_X64_MSR_GUEST_OS_ID
, HV_X64_MSR_HYPERCALL
,
1267 HV_X64_MSR_TIME_REF_COUNT
, HV_X64_MSR_REFERENCE_TSC
,
1268 HV_X64_MSR_TSC_FREQUENCY
, HV_X64_MSR_APIC_FREQUENCY
,
1269 HV_X64_MSR_CRASH_P0
, HV_X64_MSR_CRASH_P1
, HV_X64_MSR_CRASH_P2
,
1270 HV_X64_MSR_CRASH_P3
, HV_X64_MSR_CRASH_P4
, HV_X64_MSR_CRASH_CTL
,
1272 HV_X64_MSR_VP_INDEX
,
1273 HV_X64_MSR_VP_RUNTIME
,
1274 HV_X64_MSR_SCONTROL
,
1275 HV_X64_MSR_STIMER0_CONFIG
,
1276 HV_X64_MSR_VP_ASSIST_PAGE
,
1277 HV_X64_MSR_REENLIGHTENMENT_CONTROL
, HV_X64_MSR_TSC_EMULATION_CONTROL
,
1278 HV_X64_MSR_TSC_EMULATION_STATUS
,
1279 HV_X64_MSR_SYNDBG_OPTIONS
,
1280 HV_X64_MSR_SYNDBG_CONTROL
, HV_X64_MSR_SYNDBG_STATUS
,
1281 HV_X64_MSR_SYNDBG_SEND_BUFFER
, HV_X64_MSR_SYNDBG_RECV_BUFFER
,
1282 HV_X64_MSR_SYNDBG_PENDING_BUFFER
,
1284 MSR_KVM_ASYNC_PF_EN
, MSR_KVM_STEAL_TIME
,
1285 MSR_KVM_PV_EOI_EN
, MSR_KVM_ASYNC_PF_INT
, MSR_KVM_ASYNC_PF_ACK
,
1287 MSR_IA32_TSC_ADJUST
,
1288 MSR_IA32_TSCDEADLINE
,
1289 MSR_IA32_ARCH_CAPABILITIES
,
1290 MSR_IA32_PERF_CAPABILITIES
,
1291 MSR_IA32_MISC_ENABLE
,
1292 MSR_IA32_MCG_STATUS
,
1294 MSR_IA32_MCG_EXT_CTL
,
1298 MSR_MISC_FEATURES_ENABLES
,
1299 MSR_AMD64_VIRT_SPEC_CTRL
,
1304 * The following list leaves out MSRs whose values are determined
1305 * by arch/x86/kvm/vmx/nested.c based on CPUID or other MSRs.
1306 * We always support the "true" VMX control MSRs, even if the host
1307 * processor does not, so I am putting these registers here rather
1308 * than in msrs_to_save_all.
1311 MSR_IA32_VMX_TRUE_PINBASED_CTLS
,
1312 MSR_IA32_VMX_TRUE_PROCBASED_CTLS
,
1313 MSR_IA32_VMX_TRUE_EXIT_CTLS
,
1314 MSR_IA32_VMX_TRUE_ENTRY_CTLS
,
1316 MSR_IA32_VMX_CR0_FIXED0
,
1317 MSR_IA32_VMX_CR4_FIXED0
,
1318 MSR_IA32_VMX_VMCS_ENUM
,
1319 MSR_IA32_VMX_PROCBASED_CTLS2
,
1320 MSR_IA32_VMX_EPT_VPID_CAP
,
1321 MSR_IA32_VMX_VMFUNC
,
1324 MSR_KVM_POLL_CONTROL
,
1327 static u32 emulated_msrs
[ARRAY_SIZE(emulated_msrs_all
)];
1328 static unsigned num_emulated_msrs
;
1331 * List of msr numbers which are used to expose MSR-based features that
1332 * can be used by a hypervisor to validate requested CPU features.
1334 static const u32 msr_based_features_all
[] = {
1336 MSR_IA32_VMX_TRUE_PINBASED_CTLS
,
1337 MSR_IA32_VMX_PINBASED_CTLS
,
1338 MSR_IA32_VMX_TRUE_PROCBASED_CTLS
,
1339 MSR_IA32_VMX_PROCBASED_CTLS
,
1340 MSR_IA32_VMX_TRUE_EXIT_CTLS
,
1341 MSR_IA32_VMX_EXIT_CTLS
,
1342 MSR_IA32_VMX_TRUE_ENTRY_CTLS
,
1343 MSR_IA32_VMX_ENTRY_CTLS
,
1345 MSR_IA32_VMX_CR0_FIXED0
,
1346 MSR_IA32_VMX_CR0_FIXED1
,
1347 MSR_IA32_VMX_CR4_FIXED0
,
1348 MSR_IA32_VMX_CR4_FIXED1
,
1349 MSR_IA32_VMX_VMCS_ENUM
,
1350 MSR_IA32_VMX_PROCBASED_CTLS2
,
1351 MSR_IA32_VMX_EPT_VPID_CAP
,
1352 MSR_IA32_VMX_VMFUNC
,
1356 MSR_IA32_ARCH_CAPABILITIES
,
1357 MSR_IA32_PERF_CAPABILITIES
,
1360 static u32 msr_based_features
[ARRAY_SIZE(msr_based_features_all
)];
1361 static unsigned int num_msr_based_features
;
1363 static u64
kvm_get_arch_capabilities(void)
1367 if (boot_cpu_has(X86_FEATURE_ARCH_CAPABILITIES
))
1368 rdmsrl(MSR_IA32_ARCH_CAPABILITIES
, data
);
1371 * If nx_huge_pages is enabled, KVM's shadow paging will ensure that
1372 * the nested hypervisor runs with NX huge pages. If it is not,
1373 * L1 is anyway vulnerable to ITLB_MULTIHIT explots from other
1374 * L1 guests, so it need not worry about its own (L2) guests.
1376 data
|= ARCH_CAP_PSCHANGE_MC_NO
;
1379 * If we're doing cache flushes (either "always" or "cond")
1380 * we will do one whenever the guest does a vmlaunch/vmresume.
1381 * If an outer hypervisor is doing the cache flush for us
1382 * (VMENTER_L1D_FLUSH_NESTED_VM), we can safely pass that
1383 * capability to the guest too, and if EPT is disabled we're not
1384 * vulnerable. Overall, only VMENTER_L1D_FLUSH_NEVER will
1385 * require a nested hypervisor to do a flush of its own.
1387 if (l1tf_vmx_mitigation
!= VMENTER_L1D_FLUSH_NEVER
)
1388 data
|= ARCH_CAP_SKIP_VMENTRY_L1DFLUSH
;
1390 if (!boot_cpu_has_bug(X86_BUG_CPU_MELTDOWN
))
1391 data
|= ARCH_CAP_RDCL_NO
;
1392 if (!boot_cpu_has_bug(X86_BUG_SPEC_STORE_BYPASS
))
1393 data
|= ARCH_CAP_SSB_NO
;
1394 if (!boot_cpu_has_bug(X86_BUG_MDS
))
1395 data
|= ARCH_CAP_MDS_NO
;
1397 if (!boot_cpu_has(X86_FEATURE_RTM
)) {
1399 * If RTM=0 because the kernel has disabled TSX, the host might
1400 * have TAA_NO or TSX_CTRL. Clear TAA_NO (the guest sees RTM=0
1401 * and therefore knows that there cannot be TAA) but keep
1402 * TSX_CTRL: some buggy userspaces leave it set on tsx=on hosts,
1403 * and we want to allow migrating those guests to tsx=off hosts.
1405 data
&= ~ARCH_CAP_TAA_NO
;
1406 } else if (!boot_cpu_has_bug(X86_BUG_TAA
)) {
1407 data
|= ARCH_CAP_TAA_NO
;
1410 * Nothing to do here; we emulate TSX_CTRL if present on the
1411 * host so the guest can choose between disabling TSX or
1412 * using VERW to clear CPU buffers.
1419 static int kvm_get_msr_feature(struct kvm_msr_entry
*msr
)
1421 switch (msr
->index
) {
1422 case MSR_IA32_ARCH_CAPABILITIES
:
1423 msr
->data
= kvm_get_arch_capabilities();
1425 case MSR_IA32_UCODE_REV
:
1426 rdmsrl_safe(msr
->index
, &msr
->data
);
1429 return kvm_x86_ops
.get_msr_feature(msr
);
1434 static int do_get_msr_feature(struct kvm_vcpu
*vcpu
, unsigned index
, u64
*data
)
1436 struct kvm_msr_entry msr
;
1440 r
= kvm_get_msr_feature(&msr
);
1442 if (r
== KVM_MSR_RET_INVALID
) {
1443 /* Unconditionally clear the output for simplicity */
1445 if (kvm_msr_ignored_check(vcpu
, index
, 0, false))
1457 static bool __kvm_valid_efer(struct kvm_vcpu
*vcpu
, u64 efer
)
1459 if (efer
& EFER_FFXSR
&& !guest_cpuid_has(vcpu
, X86_FEATURE_FXSR_OPT
))
1462 if (efer
& EFER_SVME
&& !guest_cpuid_has(vcpu
, X86_FEATURE_SVM
))
1465 if (efer
& (EFER_LME
| EFER_LMA
) &&
1466 !guest_cpuid_has(vcpu
, X86_FEATURE_LM
))
1469 if (efer
& EFER_NX
&& !guest_cpuid_has(vcpu
, X86_FEATURE_NX
))
1475 bool kvm_valid_efer(struct kvm_vcpu
*vcpu
, u64 efer
)
1477 if (efer
& efer_reserved_bits
)
1480 return __kvm_valid_efer(vcpu
, efer
);
1482 EXPORT_SYMBOL_GPL(kvm_valid_efer
);
1484 static int set_efer(struct kvm_vcpu
*vcpu
, struct msr_data
*msr_info
)
1486 u64 old_efer
= vcpu
->arch
.efer
;
1487 u64 efer
= msr_info
->data
;
1490 if (efer
& efer_reserved_bits
)
1493 if (!msr_info
->host_initiated
) {
1494 if (!__kvm_valid_efer(vcpu
, efer
))
1497 if (is_paging(vcpu
) &&
1498 (vcpu
->arch
.efer
& EFER_LME
) != (efer
& EFER_LME
))
1503 efer
|= vcpu
->arch
.efer
& EFER_LMA
;
1505 r
= kvm_x86_ops
.set_efer(vcpu
, efer
);
1511 /* Update reserved bits */
1512 if ((efer
^ old_efer
) & EFER_NX
)
1513 kvm_mmu_reset_context(vcpu
);
1518 void kvm_enable_efer_bits(u64 mask
)
1520 efer_reserved_bits
&= ~mask
;
1522 EXPORT_SYMBOL_GPL(kvm_enable_efer_bits
);
1524 bool kvm_msr_allowed(struct kvm_vcpu
*vcpu
, u32 index
, u32 type
)
1526 struct kvm
*kvm
= vcpu
->kvm
;
1527 struct msr_bitmap_range
*ranges
= kvm
->arch
.msr_filter
.ranges
;
1528 u32 count
= kvm
->arch
.msr_filter
.count
;
1530 bool r
= kvm
->arch
.msr_filter
.default_allow
;
1533 /* MSR filtering not set up or x2APIC enabled, allow everything */
1534 if (!count
|| (index
>= 0x800 && index
<= 0x8ff))
1537 /* Prevent collision with set_msr_filter */
1538 idx
= srcu_read_lock(&kvm
->srcu
);
1540 for (i
= 0; i
< count
; i
++) {
1541 u32 start
= ranges
[i
].base
;
1542 u32 end
= start
+ ranges
[i
].nmsrs
;
1543 u32 flags
= ranges
[i
].flags
;
1544 unsigned long *bitmap
= ranges
[i
].bitmap
;
1546 if ((index
>= start
) && (index
< end
) && (flags
& type
)) {
1547 r
= !!test_bit(index
- start
, bitmap
);
1552 srcu_read_unlock(&kvm
->srcu
, idx
);
1556 EXPORT_SYMBOL_GPL(kvm_msr_allowed
);
1559 * Write @data into the MSR specified by @index. Select MSR specific fault
1560 * checks are bypassed if @host_initiated is %true.
1561 * Returns 0 on success, non-0 otherwise.
1562 * Assumes vcpu_load() was already called.
1564 static int __kvm_set_msr(struct kvm_vcpu
*vcpu
, u32 index
, u64 data
,
1565 bool host_initiated
)
1567 struct msr_data msr
;
1569 if (!host_initiated
&& !kvm_msr_allowed(vcpu
, index
, KVM_MSR_FILTER_WRITE
))
1570 return KVM_MSR_RET_FILTERED
;
1575 case MSR_KERNEL_GS_BASE
:
1578 if (is_noncanonical_address(data
, vcpu
))
1581 case MSR_IA32_SYSENTER_EIP
:
1582 case MSR_IA32_SYSENTER_ESP
:
1584 * IA32_SYSENTER_ESP and IA32_SYSENTER_EIP cause #GP if
1585 * non-canonical address is written on Intel but not on
1586 * AMD (which ignores the top 32-bits, because it does
1587 * not implement 64-bit SYSENTER).
1589 * 64-bit code should hence be able to write a non-canonical
1590 * value on AMD. Making the address canonical ensures that
1591 * vmentry does not fail on Intel after writing a non-canonical
1592 * value, and that something deterministic happens if the guest
1593 * invokes 64-bit SYSENTER.
1595 data
= get_canonical(data
, vcpu_virt_addr_bits(vcpu
));
1600 msr
.host_initiated
= host_initiated
;
1602 return kvm_x86_ops
.set_msr(vcpu
, &msr
);
1605 static int kvm_set_msr_ignored_check(struct kvm_vcpu
*vcpu
,
1606 u32 index
, u64 data
, bool host_initiated
)
1608 int ret
= __kvm_set_msr(vcpu
, index
, data
, host_initiated
);
1610 if (ret
== KVM_MSR_RET_INVALID
)
1611 if (kvm_msr_ignored_check(vcpu
, index
, data
, true))
1618 * Read the MSR specified by @index into @data. Select MSR specific fault
1619 * checks are bypassed if @host_initiated is %true.
1620 * Returns 0 on success, non-0 otherwise.
1621 * Assumes vcpu_load() was already called.
1623 int __kvm_get_msr(struct kvm_vcpu
*vcpu
, u32 index
, u64
*data
,
1624 bool host_initiated
)
1626 struct msr_data msr
;
1629 if (!host_initiated
&& !kvm_msr_allowed(vcpu
, index
, KVM_MSR_FILTER_READ
))
1630 return KVM_MSR_RET_FILTERED
;
1633 msr
.host_initiated
= host_initiated
;
1635 ret
= kvm_x86_ops
.get_msr(vcpu
, &msr
);
1641 static int kvm_get_msr_ignored_check(struct kvm_vcpu
*vcpu
,
1642 u32 index
, u64
*data
, bool host_initiated
)
1644 int ret
= __kvm_get_msr(vcpu
, index
, data
, host_initiated
);
1646 if (ret
== KVM_MSR_RET_INVALID
) {
1647 /* Unconditionally clear *data for simplicity */
1649 if (kvm_msr_ignored_check(vcpu
, index
, 0, false))
1656 int kvm_get_msr(struct kvm_vcpu
*vcpu
, u32 index
, u64
*data
)
1658 return kvm_get_msr_ignored_check(vcpu
, index
, data
, false);
1660 EXPORT_SYMBOL_GPL(kvm_get_msr
);
1662 int kvm_set_msr(struct kvm_vcpu
*vcpu
, u32 index
, u64 data
)
1664 return kvm_set_msr_ignored_check(vcpu
, index
, data
, false);
1666 EXPORT_SYMBOL_GPL(kvm_set_msr
);
1668 static int complete_emulated_rdmsr(struct kvm_vcpu
*vcpu
)
1670 int err
= vcpu
->run
->msr
.error
;
1672 kvm_rax_write(vcpu
, (u32
)vcpu
->run
->msr
.data
);
1673 kvm_rdx_write(vcpu
, vcpu
->run
->msr
.data
>> 32);
1676 return kvm_x86_ops
.complete_emulated_msr(vcpu
, err
);
1679 static int complete_emulated_wrmsr(struct kvm_vcpu
*vcpu
)
1681 return kvm_x86_ops
.complete_emulated_msr(vcpu
, vcpu
->run
->msr
.error
);
1684 static u64
kvm_msr_reason(int r
)
1687 case KVM_MSR_RET_INVALID
:
1688 return KVM_MSR_EXIT_REASON_UNKNOWN
;
1689 case KVM_MSR_RET_FILTERED
:
1690 return KVM_MSR_EXIT_REASON_FILTER
;
1692 return KVM_MSR_EXIT_REASON_INVAL
;
1696 static int kvm_msr_user_space(struct kvm_vcpu
*vcpu
, u32 index
,
1697 u32 exit_reason
, u64 data
,
1698 int (*completion
)(struct kvm_vcpu
*vcpu
),
1701 u64 msr_reason
= kvm_msr_reason(r
);
1703 /* Check if the user wanted to know about this MSR fault */
1704 if (!(vcpu
->kvm
->arch
.user_space_msr_mask
& msr_reason
))
1707 vcpu
->run
->exit_reason
= exit_reason
;
1708 vcpu
->run
->msr
.error
= 0;
1709 memset(vcpu
->run
->msr
.pad
, 0, sizeof(vcpu
->run
->msr
.pad
));
1710 vcpu
->run
->msr
.reason
= msr_reason
;
1711 vcpu
->run
->msr
.index
= index
;
1712 vcpu
->run
->msr
.data
= data
;
1713 vcpu
->arch
.complete_userspace_io
= completion
;
1718 static int kvm_get_msr_user_space(struct kvm_vcpu
*vcpu
, u32 index
, int r
)
1720 return kvm_msr_user_space(vcpu
, index
, KVM_EXIT_X86_RDMSR
, 0,
1721 complete_emulated_rdmsr
, r
);
1724 static int kvm_set_msr_user_space(struct kvm_vcpu
*vcpu
, u32 index
, u64 data
, int r
)
1726 return kvm_msr_user_space(vcpu
, index
, KVM_EXIT_X86_WRMSR
, data
,
1727 complete_emulated_wrmsr
, r
);
1730 int kvm_emulate_rdmsr(struct kvm_vcpu
*vcpu
)
1732 u32 ecx
= kvm_rcx_read(vcpu
);
1736 r
= kvm_get_msr(vcpu
, ecx
, &data
);
1738 /* MSR read failed? See if we should ask user space */
1739 if (r
&& kvm_get_msr_user_space(vcpu
, ecx
, r
)) {
1740 /* Bounce to user space */
1745 trace_kvm_msr_read(ecx
, data
);
1747 kvm_rax_write(vcpu
, data
& -1u);
1748 kvm_rdx_write(vcpu
, (data
>> 32) & -1u);
1750 trace_kvm_msr_read_ex(ecx
);
1753 return kvm_x86_ops
.complete_emulated_msr(vcpu
, r
);
1755 EXPORT_SYMBOL_GPL(kvm_emulate_rdmsr
);
1757 int kvm_emulate_wrmsr(struct kvm_vcpu
*vcpu
)
1759 u32 ecx
= kvm_rcx_read(vcpu
);
1760 u64 data
= kvm_read_edx_eax(vcpu
);
1763 r
= kvm_set_msr(vcpu
, ecx
, data
);
1765 /* MSR write failed? See if we should ask user space */
1766 if (r
&& kvm_set_msr_user_space(vcpu
, ecx
, data
, r
))
1767 /* Bounce to user space */
1770 /* Signal all other negative errors to userspace */
1775 trace_kvm_msr_write(ecx
, data
);
1777 trace_kvm_msr_write_ex(ecx
, data
);
1779 return kvm_x86_ops
.complete_emulated_msr(vcpu
, r
);
1781 EXPORT_SYMBOL_GPL(kvm_emulate_wrmsr
);
1783 bool kvm_vcpu_exit_request(struct kvm_vcpu
*vcpu
)
1785 return vcpu
->mode
== EXITING_GUEST_MODE
|| kvm_request_pending(vcpu
) ||
1786 xfer_to_guest_mode_work_pending();
1788 EXPORT_SYMBOL_GPL(kvm_vcpu_exit_request
);
1791 * The fast path for frequent and performance sensitive wrmsr emulation,
1792 * i.e. the sending of IPI, sending IPI early in the VM-Exit flow reduces
1793 * the latency of virtual IPI by avoiding the expensive bits of transitioning
1794 * from guest to host, e.g. reacquiring KVM's SRCU lock. In contrast to the
1795 * other cases which must be called after interrupts are enabled on the host.
1797 static int handle_fastpath_set_x2apic_icr_irqoff(struct kvm_vcpu
*vcpu
, u64 data
)
1799 if (!lapic_in_kernel(vcpu
) || !apic_x2apic_mode(vcpu
->arch
.apic
))
1802 if (((data
& APIC_SHORT_MASK
) == APIC_DEST_NOSHORT
) &&
1803 ((data
& APIC_DEST_MASK
) == APIC_DEST_PHYSICAL
) &&
1804 ((data
& APIC_MODE_MASK
) == APIC_DM_FIXED
) &&
1805 ((u32
)(data
>> 32) != X2APIC_BROADCAST
)) {
1808 kvm_apic_send_ipi(vcpu
->arch
.apic
, (u32
)data
, (u32
)(data
>> 32));
1809 kvm_lapic_set_reg(vcpu
->arch
.apic
, APIC_ICR2
, (u32
)(data
>> 32));
1810 kvm_lapic_set_reg(vcpu
->arch
.apic
, APIC_ICR
, (u32
)data
);
1811 trace_kvm_apic_write(APIC_ICR
, (u32
)data
);
1818 static int handle_fastpath_set_tscdeadline(struct kvm_vcpu
*vcpu
, u64 data
)
1820 if (!kvm_can_use_hv_timer(vcpu
))
1823 kvm_set_lapic_tscdeadline_msr(vcpu
, data
);
1827 fastpath_t
handle_fastpath_set_msr_irqoff(struct kvm_vcpu
*vcpu
)
1829 u32 msr
= kvm_rcx_read(vcpu
);
1831 fastpath_t ret
= EXIT_FASTPATH_NONE
;
1834 case APIC_BASE_MSR
+ (APIC_ICR
>> 4):
1835 data
= kvm_read_edx_eax(vcpu
);
1836 if (!handle_fastpath_set_x2apic_icr_irqoff(vcpu
, data
)) {
1837 kvm_skip_emulated_instruction(vcpu
);
1838 ret
= EXIT_FASTPATH_EXIT_HANDLED
;
1841 case MSR_IA32_TSCDEADLINE
:
1842 data
= kvm_read_edx_eax(vcpu
);
1843 if (!handle_fastpath_set_tscdeadline(vcpu
, data
)) {
1844 kvm_skip_emulated_instruction(vcpu
);
1845 ret
= EXIT_FASTPATH_REENTER_GUEST
;
1852 if (ret
!= EXIT_FASTPATH_NONE
)
1853 trace_kvm_msr_write(msr
, data
);
1857 EXPORT_SYMBOL_GPL(handle_fastpath_set_msr_irqoff
);
1860 * Adapt set_msr() to msr_io()'s calling convention
1862 static int do_get_msr(struct kvm_vcpu
*vcpu
, unsigned index
, u64
*data
)
1864 return kvm_get_msr_ignored_check(vcpu
, index
, data
, true);
1867 static int do_set_msr(struct kvm_vcpu
*vcpu
, unsigned index
, u64
*data
)
1869 return kvm_set_msr_ignored_check(vcpu
, index
, *data
, true);
1872 #ifdef CONFIG_X86_64
1873 struct pvclock_clock
{
1883 struct pvclock_gtod_data
{
1886 struct pvclock_clock clock
; /* extract of a clocksource struct */
1887 struct pvclock_clock raw_clock
; /* extract of a clocksource struct */
1893 static struct pvclock_gtod_data pvclock_gtod_data
;
1895 static void update_pvclock_gtod(struct timekeeper
*tk
)
1897 struct pvclock_gtod_data
*vdata
= &pvclock_gtod_data
;
1899 write_seqcount_begin(&vdata
->seq
);
1901 /* copy pvclock gtod data */
1902 vdata
->clock
.vclock_mode
= tk
->tkr_mono
.clock
->vdso_clock_mode
;
1903 vdata
->clock
.cycle_last
= tk
->tkr_mono
.cycle_last
;
1904 vdata
->clock
.mask
= tk
->tkr_mono
.mask
;
1905 vdata
->clock
.mult
= tk
->tkr_mono
.mult
;
1906 vdata
->clock
.shift
= tk
->tkr_mono
.shift
;
1907 vdata
->clock
.base_cycles
= tk
->tkr_mono
.xtime_nsec
;
1908 vdata
->clock
.offset
= tk
->tkr_mono
.base
;
1910 vdata
->raw_clock
.vclock_mode
= tk
->tkr_raw
.clock
->vdso_clock_mode
;
1911 vdata
->raw_clock
.cycle_last
= tk
->tkr_raw
.cycle_last
;
1912 vdata
->raw_clock
.mask
= tk
->tkr_raw
.mask
;
1913 vdata
->raw_clock
.mult
= tk
->tkr_raw
.mult
;
1914 vdata
->raw_clock
.shift
= tk
->tkr_raw
.shift
;
1915 vdata
->raw_clock
.base_cycles
= tk
->tkr_raw
.xtime_nsec
;
1916 vdata
->raw_clock
.offset
= tk
->tkr_raw
.base
;
1918 vdata
->wall_time_sec
= tk
->xtime_sec
;
1920 vdata
->offs_boot
= tk
->offs_boot
;
1922 write_seqcount_end(&vdata
->seq
);
1925 static s64
get_kvmclock_base_ns(void)
1927 /* Count up from boot time, but with the frequency of the raw clock. */
1928 return ktime_to_ns(ktime_add(ktime_get_raw(), pvclock_gtod_data
.offs_boot
));
1931 static s64
get_kvmclock_base_ns(void)
1933 /* Master clock not used, so we can just use CLOCK_BOOTTIME. */
1934 return ktime_get_boottime_ns();
1938 static void kvm_write_wall_clock(struct kvm
*kvm
, gpa_t wall_clock
)
1942 struct pvclock_wall_clock wc
;
1945 kvm
->arch
.wall_clock
= wall_clock
;
1950 r
= kvm_read_guest(kvm
, wall_clock
, &version
, sizeof(version
));
1955 ++version
; /* first time write, random junk */
1959 if (kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
)))
1963 * The guest calculates current wall clock time by adding
1964 * system time (updated by kvm_guest_time_update below) to the
1965 * wall clock specified here. We do the reverse here.
1967 wall_nsec
= ktime_get_real_ns() - get_kvmclock_ns(kvm
);
1969 wc
.nsec
= do_div(wall_nsec
, 1000000000);
1970 wc
.sec
= (u32
)wall_nsec
; /* overflow in 2106 guest time */
1971 wc
.version
= version
;
1973 kvm_write_guest(kvm
, wall_clock
, &wc
, sizeof(wc
));
1976 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
1979 static void kvm_write_system_time(struct kvm_vcpu
*vcpu
, gpa_t system_time
,
1980 bool old_msr
, bool host_initiated
)
1982 struct kvm_arch
*ka
= &vcpu
->kvm
->arch
;
1984 if (vcpu
->vcpu_id
== 0 && !host_initiated
) {
1985 if (ka
->boot_vcpu_runs_old_kvmclock
!= old_msr
)
1986 kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE
, vcpu
);
1988 ka
->boot_vcpu_runs_old_kvmclock
= old_msr
;
1991 vcpu
->arch
.time
= system_time
;
1992 kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE
, vcpu
);
1994 /* we verify if the enable bit is set... */
1995 vcpu
->arch
.pv_time_enabled
= false;
1996 if (!(system_time
& 1))
1999 if (!kvm_gfn_to_hva_cache_init(vcpu
->kvm
,
2000 &vcpu
->arch
.pv_time
, system_time
& ~1ULL,
2001 sizeof(struct pvclock_vcpu_time_info
)))
2002 vcpu
->arch
.pv_time_enabled
= true;
2007 static uint32_t div_frac(uint32_t dividend
, uint32_t divisor
)
2009 do_shl32_div32(dividend
, divisor
);
2013 static void kvm_get_time_scale(uint64_t scaled_hz
, uint64_t base_hz
,
2014 s8
*pshift
, u32
*pmultiplier
)
2022 scaled64
= scaled_hz
;
2023 while (tps64
> scaled64
*2 || tps64
& 0xffffffff00000000ULL
) {
2028 tps32
= (uint32_t)tps64
;
2029 while (tps32
<= scaled64
|| scaled64
& 0xffffffff00000000ULL
) {
2030 if (scaled64
& 0xffffffff00000000ULL
|| tps32
& 0x80000000)
2038 *pmultiplier
= div_frac(scaled64
, tps32
);
2041 #ifdef CONFIG_X86_64
2042 static atomic_t kvm_guest_has_master_clock
= ATOMIC_INIT(0);
2045 static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz
);
2046 static unsigned long max_tsc_khz
;
2048 static u32
adjust_tsc_khz(u32 khz
, s32 ppm
)
2050 u64 v
= (u64
)khz
* (1000000 + ppm
);
2055 static int set_tsc_khz(struct kvm_vcpu
*vcpu
, u32 user_tsc_khz
, bool scale
)
2059 /* Guest TSC same frequency as host TSC? */
2061 vcpu
->arch
.tsc_scaling_ratio
= kvm_default_tsc_scaling_ratio
;
2065 /* TSC scaling supported? */
2066 if (!kvm_has_tsc_control
) {
2067 if (user_tsc_khz
> tsc_khz
) {
2068 vcpu
->arch
.tsc_catchup
= 1;
2069 vcpu
->arch
.tsc_always_catchup
= 1;
2072 pr_warn_ratelimited("user requested TSC rate below hardware speed\n");
2077 /* TSC scaling required - calculate ratio */
2078 ratio
= mul_u64_u32_div(1ULL << kvm_tsc_scaling_ratio_frac_bits
,
2079 user_tsc_khz
, tsc_khz
);
2081 if (ratio
== 0 || ratio
>= kvm_max_tsc_scaling_ratio
) {
2082 pr_warn_ratelimited("Invalid TSC scaling ratio - virtual-tsc-khz=%u\n",
2087 vcpu
->arch
.tsc_scaling_ratio
= ratio
;
2091 static int kvm_set_tsc_khz(struct kvm_vcpu
*vcpu
, u32 user_tsc_khz
)
2093 u32 thresh_lo
, thresh_hi
;
2094 int use_scaling
= 0;
2096 /* tsc_khz can be zero if TSC calibration fails */
2097 if (user_tsc_khz
== 0) {
2098 /* set tsc_scaling_ratio to a safe value */
2099 vcpu
->arch
.tsc_scaling_ratio
= kvm_default_tsc_scaling_ratio
;
2103 /* Compute a scale to convert nanoseconds in TSC cycles */
2104 kvm_get_time_scale(user_tsc_khz
* 1000LL, NSEC_PER_SEC
,
2105 &vcpu
->arch
.virtual_tsc_shift
,
2106 &vcpu
->arch
.virtual_tsc_mult
);
2107 vcpu
->arch
.virtual_tsc_khz
= user_tsc_khz
;
2110 * Compute the variation in TSC rate which is acceptable
2111 * within the range of tolerance and decide if the
2112 * rate being applied is within that bounds of the hardware
2113 * rate. If so, no scaling or compensation need be done.
2115 thresh_lo
= adjust_tsc_khz(tsc_khz
, -tsc_tolerance_ppm
);
2116 thresh_hi
= adjust_tsc_khz(tsc_khz
, tsc_tolerance_ppm
);
2117 if (user_tsc_khz
< thresh_lo
|| user_tsc_khz
> thresh_hi
) {
2118 pr_debug("kvm: requested TSC rate %u falls outside tolerance [%u,%u]\n", user_tsc_khz
, thresh_lo
, thresh_hi
);
2121 return set_tsc_khz(vcpu
, user_tsc_khz
, use_scaling
);
2124 static u64
compute_guest_tsc(struct kvm_vcpu
*vcpu
, s64 kernel_ns
)
2126 u64 tsc
= pvclock_scale_delta(kernel_ns
-vcpu
->arch
.this_tsc_nsec
,
2127 vcpu
->arch
.virtual_tsc_mult
,
2128 vcpu
->arch
.virtual_tsc_shift
);
2129 tsc
+= vcpu
->arch
.this_tsc_write
;
2133 static inline int gtod_is_based_on_tsc(int mode
)
2135 return mode
== VDSO_CLOCKMODE_TSC
|| mode
== VDSO_CLOCKMODE_HVCLOCK
;
2138 static void kvm_track_tsc_matching(struct kvm_vcpu
*vcpu
)
2140 #ifdef CONFIG_X86_64
2142 struct kvm_arch
*ka
= &vcpu
->kvm
->arch
;
2143 struct pvclock_gtod_data
*gtod
= &pvclock_gtod_data
;
2145 vcpus_matched
= (ka
->nr_vcpus_matched_tsc
+ 1 ==
2146 atomic_read(&vcpu
->kvm
->online_vcpus
));
2149 * Once the masterclock is enabled, always perform request in
2150 * order to update it.
2152 * In order to enable masterclock, the host clocksource must be TSC
2153 * and the vcpus need to have matched TSCs. When that happens,
2154 * perform request to enable masterclock.
2156 if (ka
->use_master_clock
||
2157 (gtod_is_based_on_tsc(gtod
->clock
.vclock_mode
) && vcpus_matched
))
2158 kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE
, vcpu
);
2160 trace_kvm_track_tsc(vcpu
->vcpu_id
, ka
->nr_vcpus_matched_tsc
,
2161 atomic_read(&vcpu
->kvm
->online_vcpus
),
2162 ka
->use_master_clock
, gtod
->clock
.vclock_mode
);
2167 * Multiply tsc by a fixed point number represented by ratio.
2169 * The most significant 64-N bits (mult) of ratio represent the
2170 * integral part of the fixed point number; the remaining N bits
2171 * (frac) represent the fractional part, ie. ratio represents a fixed
2172 * point number (mult + frac * 2^(-N)).
2174 * N equals to kvm_tsc_scaling_ratio_frac_bits.
2176 static inline u64
__scale_tsc(u64 ratio
, u64 tsc
)
2178 return mul_u64_u64_shr(tsc
, ratio
, kvm_tsc_scaling_ratio_frac_bits
);
2181 u64
kvm_scale_tsc(struct kvm_vcpu
*vcpu
, u64 tsc
)
2184 u64 ratio
= vcpu
->arch
.tsc_scaling_ratio
;
2186 if (ratio
!= kvm_default_tsc_scaling_ratio
)
2187 _tsc
= __scale_tsc(ratio
, tsc
);
2191 EXPORT_SYMBOL_GPL(kvm_scale_tsc
);
2193 static u64
kvm_compute_tsc_offset(struct kvm_vcpu
*vcpu
, u64 target_tsc
)
2197 tsc
= kvm_scale_tsc(vcpu
, rdtsc());
2199 return target_tsc
- tsc
;
2202 u64
kvm_read_l1_tsc(struct kvm_vcpu
*vcpu
, u64 host_tsc
)
2204 return vcpu
->arch
.l1_tsc_offset
+ kvm_scale_tsc(vcpu
, host_tsc
);
2206 EXPORT_SYMBOL_GPL(kvm_read_l1_tsc
);
2208 static void kvm_vcpu_write_tsc_offset(struct kvm_vcpu
*vcpu
, u64 offset
)
2210 vcpu
->arch
.l1_tsc_offset
= offset
;
2211 vcpu
->arch
.tsc_offset
= kvm_x86_ops
.write_l1_tsc_offset(vcpu
, offset
);
2214 static inline bool kvm_check_tsc_unstable(void)
2216 #ifdef CONFIG_X86_64
2218 * TSC is marked unstable when we're running on Hyper-V,
2219 * 'TSC page' clocksource is good.
2221 if (pvclock_gtod_data
.clock
.vclock_mode
== VDSO_CLOCKMODE_HVCLOCK
)
2224 return check_tsc_unstable();
2227 static void kvm_synchronize_tsc(struct kvm_vcpu
*vcpu
, u64 data
)
2229 struct kvm
*kvm
= vcpu
->kvm
;
2230 u64 offset
, ns
, elapsed
;
2231 unsigned long flags
;
2233 bool already_matched
;
2234 bool synchronizing
= false;
2236 raw_spin_lock_irqsave(&kvm
->arch
.tsc_write_lock
, flags
);
2237 offset
= kvm_compute_tsc_offset(vcpu
, data
);
2238 ns
= get_kvmclock_base_ns();
2239 elapsed
= ns
- kvm
->arch
.last_tsc_nsec
;
2241 if (vcpu
->arch
.virtual_tsc_khz
) {
2244 * detection of vcpu initialization -- need to sync
2245 * with other vCPUs. This particularly helps to keep
2246 * kvm_clock stable after CPU hotplug
2248 synchronizing
= true;
2250 u64 tsc_exp
= kvm
->arch
.last_tsc_write
+
2251 nsec_to_cycles(vcpu
, elapsed
);
2252 u64 tsc_hz
= vcpu
->arch
.virtual_tsc_khz
* 1000LL;
2254 * Special case: TSC write with a small delta (1 second)
2255 * of virtual cycle time against real time is
2256 * interpreted as an attempt to synchronize the CPU.
2258 synchronizing
= data
< tsc_exp
+ tsc_hz
&&
2259 data
+ tsc_hz
> tsc_exp
;
2264 * For a reliable TSC, we can match TSC offsets, and for an unstable
2265 * TSC, we add elapsed time in this computation. We could let the
2266 * compensation code attempt to catch up if we fall behind, but
2267 * it's better to try to match offsets from the beginning.
2269 if (synchronizing
&&
2270 vcpu
->arch
.virtual_tsc_khz
== kvm
->arch
.last_tsc_khz
) {
2271 if (!kvm_check_tsc_unstable()) {
2272 offset
= kvm
->arch
.cur_tsc_offset
;
2274 u64 delta
= nsec_to_cycles(vcpu
, elapsed
);
2276 offset
= kvm_compute_tsc_offset(vcpu
, data
);
2279 already_matched
= (vcpu
->arch
.this_tsc_generation
== kvm
->arch
.cur_tsc_generation
);
2282 * We split periods of matched TSC writes into generations.
2283 * For each generation, we track the original measured
2284 * nanosecond time, offset, and write, so if TSCs are in
2285 * sync, we can match exact offset, and if not, we can match
2286 * exact software computation in compute_guest_tsc()
2288 * These values are tracked in kvm->arch.cur_xxx variables.
2290 kvm
->arch
.cur_tsc_generation
++;
2291 kvm
->arch
.cur_tsc_nsec
= ns
;
2292 kvm
->arch
.cur_tsc_write
= data
;
2293 kvm
->arch
.cur_tsc_offset
= offset
;
2298 * We also track th most recent recorded KHZ, write and time to
2299 * allow the matching interval to be extended at each write.
2301 kvm
->arch
.last_tsc_nsec
= ns
;
2302 kvm
->arch
.last_tsc_write
= data
;
2303 kvm
->arch
.last_tsc_khz
= vcpu
->arch
.virtual_tsc_khz
;
2305 vcpu
->arch
.last_guest_tsc
= data
;
2307 /* Keep track of which generation this VCPU has synchronized to */
2308 vcpu
->arch
.this_tsc_generation
= kvm
->arch
.cur_tsc_generation
;
2309 vcpu
->arch
.this_tsc_nsec
= kvm
->arch
.cur_tsc_nsec
;
2310 vcpu
->arch
.this_tsc_write
= kvm
->arch
.cur_tsc_write
;
2312 kvm_vcpu_write_tsc_offset(vcpu
, offset
);
2313 raw_spin_unlock_irqrestore(&kvm
->arch
.tsc_write_lock
, flags
);
2315 spin_lock(&kvm
->arch
.pvclock_gtod_sync_lock
);
2317 kvm
->arch
.nr_vcpus_matched_tsc
= 0;
2318 } else if (!already_matched
) {
2319 kvm
->arch
.nr_vcpus_matched_tsc
++;
2322 kvm_track_tsc_matching(vcpu
);
2323 spin_unlock(&kvm
->arch
.pvclock_gtod_sync_lock
);
2326 static inline void adjust_tsc_offset_guest(struct kvm_vcpu
*vcpu
,
2329 u64 tsc_offset
= vcpu
->arch
.l1_tsc_offset
;
2330 kvm_vcpu_write_tsc_offset(vcpu
, tsc_offset
+ adjustment
);
2333 static inline void adjust_tsc_offset_host(struct kvm_vcpu
*vcpu
, s64 adjustment
)
2335 if (vcpu
->arch
.tsc_scaling_ratio
!= kvm_default_tsc_scaling_ratio
)
2336 WARN_ON(adjustment
< 0);
2337 adjustment
= kvm_scale_tsc(vcpu
, (u64
) adjustment
);
2338 adjust_tsc_offset_guest(vcpu
, adjustment
);
2341 #ifdef CONFIG_X86_64
2343 static u64
read_tsc(void)
2345 u64 ret
= (u64
)rdtsc_ordered();
2346 u64 last
= pvclock_gtod_data
.clock
.cycle_last
;
2348 if (likely(ret
>= last
))
2352 * GCC likes to generate cmov here, but this branch is extremely
2353 * predictable (it's just a function of time and the likely is
2354 * very likely) and there's a data dependence, so force GCC
2355 * to generate a branch instead. I don't barrier() because
2356 * we don't actually need a barrier, and if this function
2357 * ever gets inlined it will generate worse code.
2363 static inline u64
vgettsc(struct pvclock_clock
*clock
, u64
*tsc_timestamp
,
2369 switch (clock
->vclock_mode
) {
2370 case VDSO_CLOCKMODE_HVCLOCK
:
2371 tsc_pg_val
= hv_read_tsc_page_tsc(hv_get_tsc_page(),
2373 if (tsc_pg_val
!= U64_MAX
) {
2374 /* TSC page valid */
2375 *mode
= VDSO_CLOCKMODE_HVCLOCK
;
2376 v
= (tsc_pg_val
- clock
->cycle_last
) &
2379 /* TSC page invalid */
2380 *mode
= VDSO_CLOCKMODE_NONE
;
2383 case VDSO_CLOCKMODE_TSC
:
2384 *mode
= VDSO_CLOCKMODE_TSC
;
2385 *tsc_timestamp
= read_tsc();
2386 v
= (*tsc_timestamp
- clock
->cycle_last
) &
2390 *mode
= VDSO_CLOCKMODE_NONE
;
2393 if (*mode
== VDSO_CLOCKMODE_NONE
)
2394 *tsc_timestamp
= v
= 0;
2396 return v
* clock
->mult
;
2399 static int do_monotonic_raw(s64
*t
, u64
*tsc_timestamp
)
2401 struct pvclock_gtod_data
*gtod
= &pvclock_gtod_data
;
2407 seq
= read_seqcount_begin(>od
->seq
);
2408 ns
= gtod
->raw_clock
.base_cycles
;
2409 ns
+= vgettsc(>od
->raw_clock
, tsc_timestamp
, &mode
);
2410 ns
>>= gtod
->raw_clock
.shift
;
2411 ns
+= ktime_to_ns(ktime_add(gtod
->raw_clock
.offset
, gtod
->offs_boot
));
2412 } while (unlikely(read_seqcount_retry(>od
->seq
, seq
)));
2418 static int do_realtime(struct timespec64
*ts
, u64
*tsc_timestamp
)
2420 struct pvclock_gtod_data
*gtod
= &pvclock_gtod_data
;
2426 seq
= read_seqcount_begin(>od
->seq
);
2427 ts
->tv_sec
= gtod
->wall_time_sec
;
2428 ns
= gtod
->clock
.base_cycles
;
2429 ns
+= vgettsc(>od
->clock
, tsc_timestamp
, &mode
);
2430 ns
>>= gtod
->clock
.shift
;
2431 } while (unlikely(read_seqcount_retry(>od
->seq
, seq
)));
2433 ts
->tv_sec
+= __iter_div_u64_rem(ns
, NSEC_PER_SEC
, &ns
);
2439 /* returns true if host is using TSC based clocksource */
2440 static bool kvm_get_time_and_clockread(s64
*kernel_ns
, u64
*tsc_timestamp
)
2442 /* checked again under seqlock below */
2443 if (!gtod_is_based_on_tsc(pvclock_gtod_data
.clock
.vclock_mode
))
2446 return gtod_is_based_on_tsc(do_monotonic_raw(kernel_ns
,
2450 /* returns true if host is using TSC based clocksource */
2451 static bool kvm_get_walltime_and_clockread(struct timespec64
*ts
,
2454 /* checked again under seqlock below */
2455 if (!gtod_is_based_on_tsc(pvclock_gtod_data
.clock
.vclock_mode
))
2458 return gtod_is_based_on_tsc(do_realtime(ts
, tsc_timestamp
));
2464 * Assuming a stable TSC across physical CPUS, and a stable TSC
2465 * across virtual CPUs, the following condition is possible.
2466 * Each numbered line represents an event visible to both
2467 * CPUs at the next numbered event.
2469 * "timespecX" represents host monotonic time. "tscX" represents
2472 * VCPU0 on CPU0 | VCPU1 on CPU1
2474 * 1. read timespec0,tsc0
2475 * 2. | timespec1 = timespec0 + N
2477 * 3. transition to guest | transition to guest
2478 * 4. ret0 = timespec0 + (rdtsc - tsc0) |
2479 * 5. | ret1 = timespec1 + (rdtsc - tsc1)
2480 * | ret1 = timespec0 + N + (rdtsc - (tsc0 + M))
2482 * Since ret0 update is visible to VCPU1 at time 5, to obey monotonicity:
2485 * - timespec0 + (rdtsc - tsc0) < timespec0 + N + (rdtsc - (tsc0 + M))
2487 * - 0 < N - M => M < N
2489 * That is, when timespec0 != timespec1, M < N. Unfortunately that is not
2490 * always the case (the difference between two distinct xtime instances
2491 * might be smaller then the difference between corresponding TSC reads,
2492 * when updating guest vcpus pvclock areas).
2494 * To avoid that problem, do not allow visibility of distinct
2495 * system_timestamp/tsc_timestamp values simultaneously: use a master
2496 * copy of host monotonic time values. Update that master copy
2499 * Rely on synchronization of host TSCs and guest TSCs for monotonicity.
2503 static void pvclock_update_vm_gtod_copy(struct kvm
*kvm
)
2505 #ifdef CONFIG_X86_64
2506 struct kvm_arch
*ka
= &kvm
->arch
;
2508 bool host_tsc_clocksource
, vcpus_matched
;
2510 vcpus_matched
= (ka
->nr_vcpus_matched_tsc
+ 1 ==
2511 atomic_read(&kvm
->online_vcpus
));
2514 * If the host uses TSC clock, then passthrough TSC as stable
2517 host_tsc_clocksource
= kvm_get_time_and_clockread(
2518 &ka
->master_kernel_ns
,
2519 &ka
->master_cycle_now
);
2521 ka
->use_master_clock
= host_tsc_clocksource
&& vcpus_matched
2522 && !ka
->backwards_tsc_observed
2523 && !ka
->boot_vcpu_runs_old_kvmclock
;
2525 if (ka
->use_master_clock
)
2526 atomic_set(&kvm_guest_has_master_clock
, 1);
2528 vclock_mode
= pvclock_gtod_data
.clock
.vclock_mode
;
2529 trace_kvm_update_master_clock(ka
->use_master_clock
, vclock_mode
,
2534 void kvm_make_mclock_inprogress_request(struct kvm
*kvm
)
2536 kvm_make_all_cpus_request(kvm
, KVM_REQ_MCLOCK_INPROGRESS
);
2539 static void kvm_gen_update_masterclock(struct kvm
*kvm
)
2541 #ifdef CONFIG_X86_64
2543 struct kvm_vcpu
*vcpu
;
2544 struct kvm_arch
*ka
= &kvm
->arch
;
2546 spin_lock(&ka
->pvclock_gtod_sync_lock
);
2547 kvm_make_mclock_inprogress_request(kvm
);
2548 /* no guest entries from this point */
2549 pvclock_update_vm_gtod_copy(kvm
);
2551 kvm_for_each_vcpu(i
, vcpu
, kvm
)
2552 kvm_make_request(KVM_REQ_CLOCK_UPDATE
, vcpu
);
2554 /* guest entries allowed */
2555 kvm_for_each_vcpu(i
, vcpu
, kvm
)
2556 kvm_clear_request(KVM_REQ_MCLOCK_INPROGRESS
, vcpu
);
2558 spin_unlock(&ka
->pvclock_gtod_sync_lock
);
2562 u64
get_kvmclock_ns(struct kvm
*kvm
)
2564 struct kvm_arch
*ka
= &kvm
->arch
;
2565 struct pvclock_vcpu_time_info hv_clock
;
2568 spin_lock(&ka
->pvclock_gtod_sync_lock
);
2569 if (!ka
->use_master_clock
) {
2570 spin_unlock(&ka
->pvclock_gtod_sync_lock
);
2571 return get_kvmclock_base_ns() + ka
->kvmclock_offset
;
2574 hv_clock
.tsc_timestamp
= ka
->master_cycle_now
;
2575 hv_clock
.system_time
= ka
->master_kernel_ns
+ ka
->kvmclock_offset
;
2576 spin_unlock(&ka
->pvclock_gtod_sync_lock
);
2578 /* both __this_cpu_read() and rdtsc() should be on the same cpu */
2581 if (__this_cpu_read(cpu_tsc_khz
)) {
2582 kvm_get_time_scale(NSEC_PER_SEC
, __this_cpu_read(cpu_tsc_khz
) * 1000LL,
2583 &hv_clock
.tsc_shift
,
2584 &hv_clock
.tsc_to_system_mul
);
2585 ret
= __pvclock_read_cycles(&hv_clock
, rdtsc());
2587 ret
= get_kvmclock_base_ns() + ka
->kvmclock_offset
;
2594 static void kvm_setup_pvclock_page(struct kvm_vcpu
*v
)
2596 struct kvm_vcpu_arch
*vcpu
= &v
->arch
;
2597 struct pvclock_vcpu_time_info guest_hv_clock
;
2599 if (unlikely(kvm_read_guest_cached(v
->kvm
, &vcpu
->pv_time
,
2600 &guest_hv_clock
, sizeof(guest_hv_clock
))))
2603 /* This VCPU is paused, but it's legal for a guest to read another
2604 * VCPU's kvmclock, so we really have to follow the specification where
2605 * it says that version is odd if data is being modified, and even after
2608 * Version field updates must be kept separate. This is because
2609 * kvm_write_guest_cached might use a "rep movs" instruction, and
2610 * writes within a string instruction are weakly ordered. So there
2611 * are three writes overall.
2613 * As a small optimization, only write the version field in the first
2614 * and third write. The vcpu->pv_time cache is still valid, because the
2615 * version field is the first in the struct.
2617 BUILD_BUG_ON(offsetof(struct pvclock_vcpu_time_info
, version
) != 0);
2619 if (guest_hv_clock
.version
& 1)
2620 ++guest_hv_clock
.version
; /* first time write, random junk */
2622 vcpu
->hv_clock
.version
= guest_hv_clock
.version
+ 1;
2623 kvm_write_guest_cached(v
->kvm
, &vcpu
->pv_time
,
2625 sizeof(vcpu
->hv_clock
.version
));
2629 /* retain PVCLOCK_GUEST_STOPPED if set in guest copy */
2630 vcpu
->hv_clock
.flags
|= (guest_hv_clock
.flags
& PVCLOCK_GUEST_STOPPED
);
2632 if (vcpu
->pvclock_set_guest_stopped_request
) {
2633 vcpu
->hv_clock
.flags
|= PVCLOCK_GUEST_STOPPED
;
2634 vcpu
->pvclock_set_guest_stopped_request
= false;
2637 trace_kvm_pvclock_update(v
->vcpu_id
, &vcpu
->hv_clock
);
2639 kvm_write_guest_cached(v
->kvm
, &vcpu
->pv_time
,
2641 sizeof(vcpu
->hv_clock
));
2645 vcpu
->hv_clock
.version
++;
2646 kvm_write_guest_cached(v
->kvm
, &vcpu
->pv_time
,
2648 sizeof(vcpu
->hv_clock
.version
));
2651 static int kvm_guest_time_update(struct kvm_vcpu
*v
)
2653 unsigned long flags
, tgt_tsc_khz
;
2654 struct kvm_vcpu_arch
*vcpu
= &v
->arch
;
2655 struct kvm_arch
*ka
= &v
->kvm
->arch
;
2657 u64 tsc_timestamp
, host_tsc
;
2659 bool use_master_clock
;
2665 * If the host uses TSC clock, then passthrough TSC as stable
2668 spin_lock(&ka
->pvclock_gtod_sync_lock
);
2669 use_master_clock
= ka
->use_master_clock
;
2670 if (use_master_clock
) {
2671 host_tsc
= ka
->master_cycle_now
;
2672 kernel_ns
= ka
->master_kernel_ns
;
2674 spin_unlock(&ka
->pvclock_gtod_sync_lock
);
2676 /* Keep irq disabled to prevent changes to the clock */
2677 local_irq_save(flags
);
2678 tgt_tsc_khz
= __this_cpu_read(cpu_tsc_khz
);
2679 if (unlikely(tgt_tsc_khz
== 0)) {
2680 local_irq_restore(flags
);
2681 kvm_make_request(KVM_REQ_CLOCK_UPDATE
, v
);
2684 if (!use_master_clock
) {
2686 kernel_ns
= get_kvmclock_base_ns();
2689 tsc_timestamp
= kvm_read_l1_tsc(v
, host_tsc
);
2692 * We may have to catch up the TSC to match elapsed wall clock
2693 * time for two reasons, even if kvmclock is used.
2694 * 1) CPU could have been running below the maximum TSC rate
2695 * 2) Broken TSC compensation resets the base at each VCPU
2696 * entry to avoid unknown leaps of TSC even when running
2697 * again on the same CPU. This may cause apparent elapsed
2698 * time to disappear, and the guest to stand still or run
2701 if (vcpu
->tsc_catchup
) {
2702 u64 tsc
= compute_guest_tsc(v
, kernel_ns
);
2703 if (tsc
> tsc_timestamp
) {
2704 adjust_tsc_offset_guest(v
, tsc
- tsc_timestamp
);
2705 tsc_timestamp
= tsc
;
2709 local_irq_restore(flags
);
2711 /* With all the info we got, fill in the values */
2713 if (kvm_has_tsc_control
)
2714 tgt_tsc_khz
= kvm_scale_tsc(v
, tgt_tsc_khz
);
2716 if (unlikely(vcpu
->hw_tsc_khz
!= tgt_tsc_khz
)) {
2717 kvm_get_time_scale(NSEC_PER_SEC
, tgt_tsc_khz
* 1000LL,
2718 &vcpu
->hv_clock
.tsc_shift
,
2719 &vcpu
->hv_clock
.tsc_to_system_mul
);
2720 vcpu
->hw_tsc_khz
= tgt_tsc_khz
;
2723 vcpu
->hv_clock
.tsc_timestamp
= tsc_timestamp
;
2724 vcpu
->hv_clock
.system_time
= kernel_ns
+ v
->kvm
->arch
.kvmclock_offset
;
2725 vcpu
->last_guest_tsc
= tsc_timestamp
;
2727 /* If the host uses TSC clocksource, then it is stable */
2729 if (use_master_clock
)
2730 pvclock_flags
|= PVCLOCK_TSC_STABLE_BIT
;
2732 vcpu
->hv_clock
.flags
= pvclock_flags
;
2734 if (vcpu
->pv_time_enabled
)
2735 kvm_setup_pvclock_page(v
);
2736 if (v
== kvm_get_vcpu(v
->kvm
, 0))
2737 kvm_hv_setup_tsc_page(v
->kvm
, &vcpu
->hv_clock
);
2742 * kvmclock updates which are isolated to a given vcpu, such as
2743 * vcpu->cpu migration, should not allow system_timestamp from
2744 * the rest of the vcpus to remain static. Otherwise ntp frequency
2745 * correction applies to one vcpu's system_timestamp but not
2748 * So in those cases, request a kvmclock update for all vcpus.
2749 * We need to rate-limit these requests though, as they can
2750 * considerably slow guests that have a large number of vcpus.
2751 * The time for a remote vcpu to update its kvmclock is bound
2752 * by the delay we use to rate-limit the updates.
2755 #define KVMCLOCK_UPDATE_DELAY msecs_to_jiffies(100)
2757 static void kvmclock_update_fn(struct work_struct
*work
)
2760 struct delayed_work
*dwork
= to_delayed_work(work
);
2761 struct kvm_arch
*ka
= container_of(dwork
, struct kvm_arch
,
2762 kvmclock_update_work
);
2763 struct kvm
*kvm
= container_of(ka
, struct kvm
, arch
);
2764 struct kvm_vcpu
*vcpu
;
2766 kvm_for_each_vcpu(i
, vcpu
, kvm
) {
2767 kvm_make_request(KVM_REQ_CLOCK_UPDATE
, vcpu
);
2768 kvm_vcpu_kick(vcpu
);
2772 static void kvm_gen_kvmclock_update(struct kvm_vcpu
*v
)
2774 struct kvm
*kvm
= v
->kvm
;
2776 kvm_make_request(KVM_REQ_CLOCK_UPDATE
, v
);
2777 schedule_delayed_work(&kvm
->arch
.kvmclock_update_work
,
2778 KVMCLOCK_UPDATE_DELAY
);
2781 #define KVMCLOCK_SYNC_PERIOD (300 * HZ)
2783 static void kvmclock_sync_fn(struct work_struct
*work
)
2785 struct delayed_work
*dwork
= to_delayed_work(work
);
2786 struct kvm_arch
*ka
= container_of(dwork
, struct kvm_arch
,
2787 kvmclock_sync_work
);
2788 struct kvm
*kvm
= container_of(ka
, struct kvm
, arch
);
2790 if (!kvmclock_periodic_sync
)
2793 schedule_delayed_work(&kvm
->arch
.kvmclock_update_work
, 0);
2794 schedule_delayed_work(&kvm
->arch
.kvmclock_sync_work
,
2795 KVMCLOCK_SYNC_PERIOD
);
2799 * On AMD, HWCR[McStatusWrEn] controls whether setting MCi_STATUS results in #GP.
2801 static bool can_set_mci_status(struct kvm_vcpu
*vcpu
)
2803 /* McStatusWrEn enabled? */
2804 if (guest_cpuid_is_amd_or_hygon(vcpu
))
2805 return !!(vcpu
->arch
.msr_hwcr
& BIT_ULL(18));
2810 static int set_msr_mce(struct kvm_vcpu
*vcpu
, struct msr_data
*msr_info
)
2812 u64 mcg_cap
= vcpu
->arch
.mcg_cap
;
2813 unsigned bank_num
= mcg_cap
& 0xff;
2814 u32 msr
= msr_info
->index
;
2815 u64 data
= msr_info
->data
;
2818 case MSR_IA32_MCG_STATUS
:
2819 vcpu
->arch
.mcg_status
= data
;
2821 case MSR_IA32_MCG_CTL
:
2822 if (!(mcg_cap
& MCG_CTL_P
) &&
2823 (data
|| !msr_info
->host_initiated
))
2825 if (data
!= 0 && data
!= ~(u64
)0)
2827 vcpu
->arch
.mcg_ctl
= data
;
2830 if (msr
>= MSR_IA32_MC0_CTL
&&
2831 msr
< MSR_IA32_MCx_CTL(bank_num
)) {
2832 u32 offset
= array_index_nospec(
2833 msr
- MSR_IA32_MC0_CTL
,
2834 MSR_IA32_MCx_CTL(bank_num
) - MSR_IA32_MC0_CTL
);
2836 /* only 0 or all 1s can be written to IA32_MCi_CTL
2837 * some Linux kernels though clear bit 10 in bank 4 to
2838 * workaround a BIOS/GART TBL issue on AMD K8s, ignore
2839 * this to avoid an uncatched #GP in the guest
2841 if ((offset
& 0x3) == 0 &&
2842 data
!= 0 && (data
| (1 << 10)) != ~(u64
)0)
2846 if (!msr_info
->host_initiated
&&
2847 (offset
& 0x3) == 1 && data
!= 0) {
2848 if (!can_set_mci_status(vcpu
))
2852 vcpu
->arch
.mce_banks
[offset
] = data
;
2860 static int xen_hvm_config(struct kvm_vcpu
*vcpu
, u64 data
)
2862 struct kvm
*kvm
= vcpu
->kvm
;
2863 int lm
= is_long_mode(vcpu
);
2864 u8
*blob_addr
= lm
? (u8
*)(long)kvm
->arch
.xen_hvm_config
.blob_addr_64
2865 : (u8
*)(long)kvm
->arch
.xen_hvm_config
.blob_addr_32
;
2866 u8 blob_size
= lm
? kvm
->arch
.xen_hvm_config
.blob_size_64
2867 : kvm
->arch
.xen_hvm_config
.blob_size_32
;
2868 u32 page_num
= data
& ~PAGE_MASK
;
2869 u64 page_addr
= data
& PAGE_MASK
;
2872 if (page_num
>= blob_size
)
2875 page
= memdup_user(blob_addr
+ (page_num
* PAGE_SIZE
), PAGE_SIZE
);
2877 return PTR_ERR(page
);
2879 if (kvm_vcpu_write_guest(vcpu
, page_addr
, page
, PAGE_SIZE
)) {
2886 static inline bool kvm_pv_async_pf_enabled(struct kvm_vcpu
*vcpu
)
2888 u64 mask
= KVM_ASYNC_PF_ENABLED
| KVM_ASYNC_PF_DELIVERY_AS_INT
;
2890 return (vcpu
->arch
.apf
.msr_en_val
& mask
) == mask
;
2893 static int kvm_pv_enable_async_pf(struct kvm_vcpu
*vcpu
, u64 data
)
2895 gpa_t gpa
= data
& ~0x3f;
2897 /* Bits 4:5 are reserved, Should be zero */
2901 if (!guest_pv_has(vcpu
, KVM_FEATURE_ASYNC_PF_VMEXIT
) &&
2902 (data
& KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT
))
2905 if (!guest_pv_has(vcpu
, KVM_FEATURE_ASYNC_PF_INT
) &&
2906 (data
& KVM_ASYNC_PF_DELIVERY_AS_INT
))
2909 if (!lapic_in_kernel(vcpu
))
2910 return data
? 1 : 0;
2912 vcpu
->arch
.apf
.msr_en_val
= data
;
2914 if (!kvm_pv_async_pf_enabled(vcpu
)) {
2915 kvm_clear_async_pf_completion_queue(vcpu
);
2916 kvm_async_pf_hash_reset(vcpu
);
2920 if (kvm_gfn_to_hva_cache_init(vcpu
->kvm
, &vcpu
->arch
.apf
.data
, gpa
,
2924 vcpu
->arch
.apf
.send_user_only
= !(data
& KVM_ASYNC_PF_SEND_ALWAYS
);
2925 vcpu
->arch
.apf
.delivery_as_pf_vmexit
= data
& KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT
;
2927 kvm_async_pf_wakeup_all(vcpu
);
2932 static int kvm_pv_enable_async_pf_int(struct kvm_vcpu
*vcpu
, u64 data
)
2934 /* Bits 8-63 are reserved */
2938 if (!lapic_in_kernel(vcpu
))
2941 vcpu
->arch
.apf
.msr_int_val
= data
;
2943 vcpu
->arch
.apf
.vec
= data
& KVM_ASYNC_PF_VEC_MASK
;
2948 static void kvmclock_reset(struct kvm_vcpu
*vcpu
)
2950 vcpu
->arch
.pv_time_enabled
= false;
2951 vcpu
->arch
.time
= 0;
2954 static void kvm_vcpu_flush_tlb_all(struct kvm_vcpu
*vcpu
)
2956 ++vcpu
->stat
.tlb_flush
;
2957 kvm_x86_ops
.tlb_flush_all(vcpu
);
2960 static void kvm_vcpu_flush_tlb_guest(struct kvm_vcpu
*vcpu
)
2962 ++vcpu
->stat
.tlb_flush
;
2963 kvm_x86_ops
.tlb_flush_guest(vcpu
);
2966 static void record_steal_time(struct kvm_vcpu
*vcpu
)
2968 struct kvm_host_map map
;
2969 struct kvm_steal_time
*st
;
2971 if (!(vcpu
->arch
.st
.msr_val
& KVM_MSR_ENABLED
))
2974 /* -EAGAIN is returned in atomic context so we can just return. */
2975 if (kvm_map_gfn(vcpu
, vcpu
->arch
.st
.msr_val
>> PAGE_SHIFT
,
2976 &map
, &vcpu
->arch
.st
.cache
, false))
2980 offset_in_page(vcpu
->arch
.st
.msr_val
& KVM_STEAL_VALID_BITS
);
2983 * Doing a TLB flush here, on the guest's behalf, can avoid
2986 if (guest_pv_has(vcpu
, KVM_FEATURE_PV_TLB_FLUSH
)) {
2987 trace_kvm_pv_tlb_flush(vcpu
->vcpu_id
,
2988 st
->preempted
& KVM_VCPU_FLUSH_TLB
);
2989 if (xchg(&st
->preempted
, 0) & KVM_VCPU_FLUSH_TLB
)
2990 kvm_vcpu_flush_tlb_guest(vcpu
);
2993 vcpu
->arch
.st
.preempted
= 0;
2995 if (st
->version
& 1)
2996 st
->version
+= 1; /* first time write, random junk */
3002 st
->steal
+= current
->sched_info
.run_delay
-
3003 vcpu
->arch
.st
.last_steal
;
3004 vcpu
->arch
.st
.last_steal
= current
->sched_info
.run_delay
;
3010 kvm_unmap_gfn(vcpu
, &map
, &vcpu
->arch
.st
.cache
, true, false);
3013 int kvm_set_msr_common(struct kvm_vcpu
*vcpu
, struct msr_data
*msr_info
)
3016 u32 msr
= msr_info
->index
;
3017 u64 data
= msr_info
->data
;
3020 case MSR_AMD64_NB_CFG
:
3021 case MSR_IA32_UCODE_WRITE
:
3022 case MSR_VM_HSAVE_PA
:
3023 case MSR_AMD64_PATCH_LOADER
:
3024 case MSR_AMD64_BU_CFG2
:
3025 case MSR_AMD64_DC_CFG
:
3026 case MSR_F15H_EX_CFG
:
3029 case MSR_IA32_UCODE_REV
:
3030 if (msr_info
->host_initiated
)
3031 vcpu
->arch
.microcode_version
= data
;
3033 case MSR_IA32_ARCH_CAPABILITIES
:
3034 if (!msr_info
->host_initiated
)
3036 vcpu
->arch
.arch_capabilities
= data
;
3038 case MSR_IA32_PERF_CAPABILITIES
: {
3039 struct kvm_msr_entry msr_ent
= {.index
= msr
, .data
= 0};
3041 if (!msr_info
->host_initiated
)
3043 if (guest_cpuid_has(vcpu
, X86_FEATURE_PDCM
) && kvm_get_msr_feature(&msr_ent
))
3045 if (data
& ~msr_ent
.data
)
3048 vcpu
->arch
.perf_capabilities
= data
;
3053 return set_efer(vcpu
, msr_info
);
3055 data
&= ~(u64
)0x40; /* ignore flush filter disable */
3056 data
&= ~(u64
)0x100; /* ignore ignne emulation enable */
3057 data
&= ~(u64
)0x8; /* ignore TLB cache disable */
3059 /* Handle McStatusWrEn */
3060 if (data
== BIT_ULL(18)) {
3061 vcpu
->arch
.msr_hwcr
= data
;
3062 } else if (data
!= 0) {
3063 vcpu_unimpl(vcpu
, "unimplemented HWCR wrmsr: 0x%llx\n",
3068 case MSR_FAM10H_MMIO_CONF_BASE
:
3070 vcpu_unimpl(vcpu
, "unimplemented MMIO_CONF_BASE wrmsr: "
3075 case MSR_IA32_DEBUGCTLMSR
:
3077 /* We support the non-activated case already */
3079 } else if (data
& ~(DEBUGCTLMSR_LBR
| DEBUGCTLMSR_BTF
)) {
3080 /* Values other than LBR and BTF are vendor-specific,
3081 thus reserved and should throw a #GP */
3083 } else if (report_ignored_msrs
)
3084 vcpu_unimpl(vcpu
, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
3087 case 0x200 ... 0x2ff:
3088 return kvm_mtrr_set_msr(vcpu
, msr
, data
);
3089 case MSR_IA32_APICBASE
:
3090 return kvm_set_apic_base(vcpu
, msr_info
);
3091 case APIC_BASE_MSR
... APIC_BASE_MSR
+ 0xff:
3092 return kvm_x2apic_msr_write(vcpu
, msr
, data
);
3093 case MSR_IA32_TSCDEADLINE
:
3094 kvm_set_lapic_tscdeadline_msr(vcpu
, data
);
3096 case MSR_IA32_TSC_ADJUST
:
3097 if (guest_cpuid_has(vcpu
, X86_FEATURE_TSC_ADJUST
)) {
3098 if (!msr_info
->host_initiated
) {
3099 s64 adj
= data
- vcpu
->arch
.ia32_tsc_adjust_msr
;
3100 adjust_tsc_offset_guest(vcpu
, adj
);
3102 vcpu
->arch
.ia32_tsc_adjust_msr
= data
;
3105 case MSR_IA32_MISC_ENABLE
:
3106 if (!kvm_check_has_quirk(vcpu
->kvm
, KVM_X86_QUIRK_MISC_ENABLE_NO_MWAIT
) &&
3107 ((vcpu
->arch
.ia32_misc_enable_msr
^ data
) & MSR_IA32_MISC_ENABLE_MWAIT
)) {
3108 if (!guest_cpuid_has(vcpu
, X86_FEATURE_XMM3
))
3110 vcpu
->arch
.ia32_misc_enable_msr
= data
;
3111 kvm_update_cpuid_runtime(vcpu
);
3113 vcpu
->arch
.ia32_misc_enable_msr
= data
;
3116 case MSR_IA32_SMBASE
:
3117 if (!msr_info
->host_initiated
)
3119 vcpu
->arch
.smbase
= data
;
3121 case MSR_IA32_POWER_CTL
:
3122 vcpu
->arch
.msr_ia32_power_ctl
= data
;
3125 if (msr_info
->host_initiated
) {
3126 kvm_synchronize_tsc(vcpu
, data
);
3128 u64 adj
= kvm_compute_tsc_offset(vcpu
, data
) - vcpu
->arch
.l1_tsc_offset
;
3129 adjust_tsc_offset_guest(vcpu
, adj
);
3130 vcpu
->arch
.ia32_tsc_adjust_msr
+= adj
;
3134 if (!msr_info
->host_initiated
&&
3135 !guest_cpuid_has(vcpu
, X86_FEATURE_XSAVES
))
3138 * KVM supports exposing PT to the guest, but does not support
3139 * IA32_XSS[bit 8]. Guests have to use RDMSR/WRMSR rather than
3140 * XSAVES/XRSTORS to save/restore PT MSRs.
3142 if (data
& ~supported_xss
)
3144 vcpu
->arch
.ia32_xss
= data
;
3147 if (!msr_info
->host_initiated
)
3149 vcpu
->arch
.smi_count
= data
;
3151 case MSR_KVM_WALL_CLOCK_NEW
:
3152 if (!guest_pv_has(vcpu
, KVM_FEATURE_CLOCKSOURCE2
))
3155 kvm_write_wall_clock(vcpu
->kvm
, data
);
3157 case MSR_KVM_WALL_CLOCK
:
3158 if (!guest_pv_has(vcpu
, KVM_FEATURE_CLOCKSOURCE
))
3161 kvm_write_wall_clock(vcpu
->kvm
, data
);
3163 case MSR_KVM_SYSTEM_TIME_NEW
:
3164 if (!guest_pv_has(vcpu
, KVM_FEATURE_CLOCKSOURCE2
))
3167 kvm_write_system_time(vcpu
, data
, false, msr_info
->host_initiated
);
3169 case MSR_KVM_SYSTEM_TIME
:
3170 if (!guest_pv_has(vcpu
, KVM_FEATURE_CLOCKSOURCE
))
3173 kvm_write_system_time(vcpu
, data
, true, msr_info
->host_initiated
);
3175 case MSR_KVM_ASYNC_PF_EN
:
3176 if (!guest_pv_has(vcpu
, KVM_FEATURE_ASYNC_PF
))
3179 if (kvm_pv_enable_async_pf(vcpu
, data
))
3182 case MSR_KVM_ASYNC_PF_INT
:
3183 if (!guest_pv_has(vcpu
, KVM_FEATURE_ASYNC_PF_INT
))
3186 if (kvm_pv_enable_async_pf_int(vcpu
, data
))
3189 case MSR_KVM_ASYNC_PF_ACK
:
3190 if (!guest_pv_has(vcpu
, KVM_FEATURE_ASYNC_PF
))
3193 vcpu
->arch
.apf
.pageready_pending
= false;
3194 kvm_check_async_pf_completion(vcpu
);
3197 case MSR_KVM_STEAL_TIME
:
3198 if (!guest_pv_has(vcpu
, KVM_FEATURE_STEAL_TIME
))
3201 if (unlikely(!sched_info_on()))
3204 if (data
& KVM_STEAL_RESERVED_MASK
)
3207 vcpu
->arch
.st
.msr_val
= data
;
3209 if (!(data
& KVM_MSR_ENABLED
))
3212 kvm_make_request(KVM_REQ_STEAL_UPDATE
, vcpu
);
3215 case MSR_KVM_PV_EOI_EN
:
3216 if (!guest_pv_has(vcpu
, KVM_FEATURE_PV_EOI
))
3219 if (kvm_lapic_enable_pv_eoi(vcpu
, data
, sizeof(u8
)))
3223 case MSR_KVM_POLL_CONTROL
:
3224 if (!guest_pv_has(vcpu
, KVM_FEATURE_POLL_CONTROL
))
3227 /* only enable bit supported */
3228 if (data
& (-1ULL << 1))
3231 vcpu
->arch
.msr_kvm_poll_control
= data
;
3234 case MSR_IA32_MCG_CTL
:
3235 case MSR_IA32_MCG_STATUS
:
3236 case MSR_IA32_MC0_CTL
... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS
) - 1:
3237 return set_msr_mce(vcpu
, msr_info
);
3239 case MSR_K7_PERFCTR0
... MSR_K7_PERFCTR3
:
3240 case MSR_P6_PERFCTR0
... MSR_P6_PERFCTR1
:
3243 case MSR_K7_EVNTSEL0
... MSR_K7_EVNTSEL3
:
3244 case MSR_P6_EVNTSEL0
... MSR_P6_EVNTSEL1
:
3245 if (kvm_pmu_is_valid_msr(vcpu
, msr
))
3246 return kvm_pmu_set_msr(vcpu
, msr_info
);
3248 if (pr
|| data
!= 0)
3249 vcpu_unimpl(vcpu
, "disabled perfctr wrmsr: "
3250 "0x%x data 0x%llx\n", msr
, data
);
3252 case MSR_K7_CLK_CTL
:
3254 * Ignore all writes to this no longer documented MSR.
3255 * Writes are only relevant for old K7 processors,
3256 * all pre-dating SVM, but a recommended workaround from
3257 * AMD for these chips. It is possible to specify the
3258 * affected processor models on the command line, hence
3259 * the need to ignore the workaround.
3262 case HV_X64_MSR_GUEST_OS_ID
... HV_X64_MSR_SINT15
:
3263 case HV_X64_MSR_SYNDBG_CONTROL
... HV_X64_MSR_SYNDBG_PENDING_BUFFER
:
3264 case HV_X64_MSR_SYNDBG_OPTIONS
:
3265 case HV_X64_MSR_CRASH_P0
... HV_X64_MSR_CRASH_P4
:
3266 case HV_X64_MSR_CRASH_CTL
:
3267 case HV_X64_MSR_STIMER0_CONFIG
... HV_X64_MSR_STIMER3_COUNT
:
3268 case HV_X64_MSR_REENLIGHTENMENT_CONTROL
:
3269 case HV_X64_MSR_TSC_EMULATION_CONTROL
:
3270 case HV_X64_MSR_TSC_EMULATION_STATUS
:
3271 return kvm_hv_set_msr_common(vcpu
, msr
, data
,
3272 msr_info
->host_initiated
);
3273 case MSR_IA32_BBL_CR_CTL3
:
3274 /* Drop writes to this legacy MSR -- see rdmsr
3275 * counterpart for further detail.
3277 if (report_ignored_msrs
)
3278 vcpu_unimpl(vcpu
, "ignored wrmsr: 0x%x data 0x%llx\n",
3281 case MSR_AMD64_OSVW_ID_LENGTH
:
3282 if (!guest_cpuid_has(vcpu
, X86_FEATURE_OSVW
))
3284 vcpu
->arch
.osvw
.length
= data
;
3286 case MSR_AMD64_OSVW_STATUS
:
3287 if (!guest_cpuid_has(vcpu
, X86_FEATURE_OSVW
))
3289 vcpu
->arch
.osvw
.status
= data
;
3291 case MSR_PLATFORM_INFO
:
3292 if (!msr_info
->host_initiated
||
3293 (!(data
& MSR_PLATFORM_INFO_CPUID_FAULT
) &&
3294 cpuid_fault_enabled(vcpu
)))
3296 vcpu
->arch
.msr_platform_info
= data
;
3298 case MSR_MISC_FEATURES_ENABLES
:
3299 if (data
& ~MSR_MISC_FEATURES_ENABLES_CPUID_FAULT
||
3300 (data
& MSR_MISC_FEATURES_ENABLES_CPUID_FAULT
&&
3301 !supports_cpuid_fault(vcpu
)))
3303 vcpu
->arch
.msr_misc_features_enables
= data
;
3306 if (msr
&& (msr
== vcpu
->kvm
->arch
.xen_hvm_config
.msr
))
3307 return xen_hvm_config(vcpu
, data
);
3308 if (kvm_pmu_is_valid_msr(vcpu
, msr
))
3309 return kvm_pmu_set_msr(vcpu
, msr_info
);
3310 return KVM_MSR_RET_INVALID
;
3314 EXPORT_SYMBOL_GPL(kvm_set_msr_common
);
3316 static int get_msr_mce(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
, bool host
)
3319 u64 mcg_cap
= vcpu
->arch
.mcg_cap
;
3320 unsigned bank_num
= mcg_cap
& 0xff;
3323 case MSR_IA32_P5_MC_ADDR
:
3324 case MSR_IA32_P5_MC_TYPE
:
3327 case MSR_IA32_MCG_CAP
:
3328 data
= vcpu
->arch
.mcg_cap
;
3330 case MSR_IA32_MCG_CTL
:
3331 if (!(mcg_cap
& MCG_CTL_P
) && !host
)
3333 data
= vcpu
->arch
.mcg_ctl
;
3335 case MSR_IA32_MCG_STATUS
:
3336 data
= vcpu
->arch
.mcg_status
;
3339 if (msr
>= MSR_IA32_MC0_CTL
&&
3340 msr
< MSR_IA32_MCx_CTL(bank_num
)) {
3341 u32 offset
= array_index_nospec(
3342 msr
- MSR_IA32_MC0_CTL
,
3343 MSR_IA32_MCx_CTL(bank_num
) - MSR_IA32_MC0_CTL
);
3345 data
= vcpu
->arch
.mce_banks
[offset
];
3354 int kvm_get_msr_common(struct kvm_vcpu
*vcpu
, struct msr_data
*msr_info
)
3356 switch (msr_info
->index
) {
3357 case MSR_IA32_PLATFORM_ID
:
3358 case MSR_IA32_EBL_CR_POWERON
:
3359 case MSR_IA32_DEBUGCTLMSR
:
3360 case MSR_IA32_LASTBRANCHFROMIP
:
3361 case MSR_IA32_LASTBRANCHTOIP
:
3362 case MSR_IA32_LASTINTFROMIP
:
3363 case MSR_IA32_LASTINTTOIP
:
3365 case MSR_K8_TSEG_ADDR
:
3366 case MSR_K8_TSEG_MASK
:
3367 case MSR_VM_HSAVE_PA
:
3368 case MSR_K8_INT_PENDING_MSG
:
3369 case MSR_AMD64_NB_CFG
:
3370 case MSR_FAM10H_MMIO_CONF_BASE
:
3371 case MSR_AMD64_BU_CFG2
:
3372 case MSR_IA32_PERF_CTL
:
3373 case MSR_AMD64_DC_CFG
:
3374 case MSR_F15H_EX_CFG
:
3376 * Intel Sandy Bridge CPUs must support the RAPL (running average power
3377 * limit) MSRs. Just return 0, as we do not want to expose the host
3378 * data here. Do not conditionalize this on CPUID, as KVM does not do
3379 * so for existing CPU-specific MSRs.
3381 case MSR_RAPL_POWER_UNIT
:
3382 case MSR_PP0_ENERGY_STATUS
: /* Power plane 0 (core) */
3383 case MSR_PP1_ENERGY_STATUS
: /* Power plane 1 (graphics uncore) */
3384 case MSR_PKG_ENERGY_STATUS
: /* Total package */
3385 case MSR_DRAM_ENERGY_STATUS
: /* DRAM controller */
3388 case MSR_F15H_PERF_CTL0
... MSR_F15H_PERF_CTR5
:
3389 case MSR_K7_EVNTSEL0
... MSR_K7_EVNTSEL3
:
3390 case MSR_K7_PERFCTR0
... MSR_K7_PERFCTR3
:
3391 case MSR_P6_PERFCTR0
... MSR_P6_PERFCTR1
:
3392 case MSR_P6_EVNTSEL0
... MSR_P6_EVNTSEL1
:
3393 if (kvm_pmu_is_valid_msr(vcpu
, msr_info
->index
))
3394 return kvm_pmu_get_msr(vcpu
, msr_info
);
3397 case MSR_IA32_UCODE_REV
:
3398 msr_info
->data
= vcpu
->arch
.microcode_version
;
3400 case MSR_IA32_ARCH_CAPABILITIES
:
3401 if (!msr_info
->host_initiated
&&
3402 !guest_cpuid_has(vcpu
, X86_FEATURE_ARCH_CAPABILITIES
))
3404 msr_info
->data
= vcpu
->arch
.arch_capabilities
;
3406 case MSR_IA32_PERF_CAPABILITIES
:
3407 if (!msr_info
->host_initiated
&&
3408 !guest_cpuid_has(vcpu
, X86_FEATURE_PDCM
))
3410 msr_info
->data
= vcpu
->arch
.perf_capabilities
;
3412 case MSR_IA32_POWER_CTL
:
3413 msr_info
->data
= vcpu
->arch
.msr_ia32_power_ctl
;
3415 case MSR_IA32_TSC
: {
3417 * Intel SDM states that MSR_IA32_TSC read adds the TSC offset
3418 * even when not intercepted. AMD manual doesn't explicitly
3419 * state this but appears to behave the same.
3421 * On userspace reads and writes, however, we unconditionally
3422 * return L1's TSC value to ensure backwards-compatible
3423 * behavior for migration.
3425 u64 tsc_offset
= msr_info
->host_initiated
? vcpu
->arch
.l1_tsc_offset
:
3426 vcpu
->arch
.tsc_offset
;
3428 msr_info
->data
= kvm_scale_tsc(vcpu
, rdtsc()) + tsc_offset
;
3432 case 0x200 ... 0x2ff:
3433 return kvm_mtrr_get_msr(vcpu
, msr_info
->index
, &msr_info
->data
);
3434 case 0xcd: /* fsb frequency */
3438 * MSR_EBC_FREQUENCY_ID
3439 * Conservative value valid for even the basic CPU models.
3440 * Models 0,1: 000 in bits 23:21 indicating a bus speed of
3441 * 100MHz, model 2 000 in bits 18:16 indicating 100MHz,
3442 * and 266MHz for model 3, or 4. Set Core Clock
3443 * Frequency to System Bus Frequency Ratio to 1 (bits
3444 * 31:24) even though these are only valid for CPU
3445 * models > 2, however guests may end up dividing or
3446 * multiplying by zero otherwise.
3448 case MSR_EBC_FREQUENCY_ID
:
3449 msr_info
->data
= 1 << 24;
3451 case MSR_IA32_APICBASE
:
3452 msr_info
->data
= kvm_get_apic_base(vcpu
);
3454 case APIC_BASE_MSR
... APIC_BASE_MSR
+ 0xff:
3455 return kvm_x2apic_msr_read(vcpu
, msr_info
->index
, &msr_info
->data
);
3456 case MSR_IA32_TSCDEADLINE
:
3457 msr_info
->data
= kvm_get_lapic_tscdeadline_msr(vcpu
);
3459 case MSR_IA32_TSC_ADJUST
:
3460 msr_info
->data
= (u64
)vcpu
->arch
.ia32_tsc_adjust_msr
;
3462 case MSR_IA32_MISC_ENABLE
:
3463 msr_info
->data
= vcpu
->arch
.ia32_misc_enable_msr
;
3465 case MSR_IA32_SMBASE
:
3466 if (!msr_info
->host_initiated
)
3468 msr_info
->data
= vcpu
->arch
.smbase
;
3471 msr_info
->data
= vcpu
->arch
.smi_count
;
3473 case MSR_IA32_PERF_STATUS
:
3474 /* TSC increment by tick */
3475 msr_info
->data
= 1000ULL;
3476 /* CPU multiplier */
3477 msr_info
->data
|= (((uint64_t)4ULL) << 40);
3480 msr_info
->data
= vcpu
->arch
.efer
;
3482 case MSR_KVM_WALL_CLOCK
:
3483 if (!guest_pv_has(vcpu
, KVM_FEATURE_CLOCKSOURCE
))
3486 msr_info
->data
= vcpu
->kvm
->arch
.wall_clock
;
3488 case MSR_KVM_WALL_CLOCK_NEW
:
3489 if (!guest_pv_has(vcpu
, KVM_FEATURE_CLOCKSOURCE2
))
3492 msr_info
->data
= vcpu
->kvm
->arch
.wall_clock
;
3494 case MSR_KVM_SYSTEM_TIME
:
3495 if (!guest_pv_has(vcpu
, KVM_FEATURE_CLOCKSOURCE
))
3498 msr_info
->data
= vcpu
->arch
.time
;
3500 case MSR_KVM_SYSTEM_TIME_NEW
:
3501 if (!guest_pv_has(vcpu
, KVM_FEATURE_CLOCKSOURCE2
))
3504 msr_info
->data
= vcpu
->arch
.time
;
3506 case MSR_KVM_ASYNC_PF_EN
:
3507 if (!guest_pv_has(vcpu
, KVM_FEATURE_ASYNC_PF
))
3510 msr_info
->data
= vcpu
->arch
.apf
.msr_en_val
;
3512 case MSR_KVM_ASYNC_PF_INT
:
3513 if (!guest_pv_has(vcpu
, KVM_FEATURE_ASYNC_PF_INT
))
3516 msr_info
->data
= vcpu
->arch
.apf
.msr_int_val
;
3518 case MSR_KVM_ASYNC_PF_ACK
:
3519 if (!guest_pv_has(vcpu
, KVM_FEATURE_ASYNC_PF
))
3524 case MSR_KVM_STEAL_TIME
:
3525 if (!guest_pv_has(vcpu
, KVM_FEATURE_STEAL_TIME
))
3528 msr_info
->data
= vcpu
->arch
.st
.msr_val
;
3530 case MSR_KVM_PV_EOI_EN
:
3531 if (!guest_pv_has(vcpu
, KVM_FEATURE_PV_EOI
))
3534 msr_info
->data
= vcpu
->arch
.pv_eoi
.msr_val
;
3536 case MSR_KVM_POLL_CONTROL
:
3537 if (!guest_pv_has(vcpu
, KVM_FEATURE_POLL_CONTROL
))
3540 msr_info
->data
= vcpu
->arch
.msr_kvm_poll_control
;
3542 case MSR_IA32_P5_MC_ADDR
:
3543 case MSR_IA32_P5_MC_TYPE
:
3544 case MSR_IA32_MCG_CAP
:
3545 case MSR_IA32_MCG_CTL
:
3546 case MSR_IA32_MCG_STATUS
:
3547 case MSR_IA32_MC0_CTL
... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS
) - 1:
3548 return get_msr_mce(vcpu
, msr_info
->index
, &msr_info
->data
,
3549 msr_info
->host_initiated
);
3551 if (!msr_info
->host_initiated
&&
3552 !guest_cpuid_has(vcpu
, X86_FEATURE_XSAVES
))
3554 msr_info
->data
= vcpu
->arch
.ia32_xss
;
3556 case MSR_K7_CLK_CTL
:
3558 * Provide expected ramp-up count for K7. All other
3559 * are set to zero, indicating minimum divisors for
3562 * This prevents guest kernels on AMD host with CPU
3563 * type 6, model 8 and higher from exploding due to
3564 * the rdmsr failing.
3566 msr_info
->data
= 0x20000000;
3568 case HV_X64_MSR_GUEST_OS_ID
... HV_X64_MSR_SINT15
:
3569 case HV_X64_MSR_SYNDBG_CONTROL
... HV_X64_MSR_SYNDBG_PENDING_BUFFER
:
3570 case HV_X64_MSR_SYNDBG_OPTIONS
:
3571 case HV_X64_MSR_CRASH_P0
... HV_X64_MSR_CRASH_P4
:
3572 case HV_X64_MSR_CRASH_CTL
:
3573 case HV_X64_MSR_STIMER0_CONFIG
... HV_X64_MSR_STIMER3_COUNT
:
3574 case HV_X64_MSR_REENLIGHTENMENT_CONTROL
:
3575 case HV_X64_MSR_TSC_EMULATION_CONTROL
:
3576 case HV_X64_MSR_TSC_EMULATION_STATUS
:
3577 return kvm_hv_get_msr_common(vcpu
,
3578 msr_info
->index
, &msr_info
->data
,
3579 msr_info
->host_initiated
);
3580 case MSR_IA32_BBL_CR_CTL3
:
3581 /* This legacy MSR exists but isn't fully documented in current
3582 * silicon. It is however accessed by winxp in very narrow
3583 * scenarios where it sets bit #19, itself documented as
3584 * a "reserved" bit. Best effort attempt to source coherent
3585 * read data here should the balance of the register be
3586 * interpreted by the guest:
3588 * L2 cache control register 3: 64GB range, 256KB size,
3589 * enabled, latency 0x1, configured
3591 msr_info
->data
= 0xbe702111;
3593 case MSR_AMD64_OSVW_ID_LENGTH
:
3594 if (!guest_cpuid_has(vcpu
, X86_FEATURE_OSVW
))
3596 msr_info
->data
= vcpu
->arch
.osvw
.length
;
3598 case MSR_AMD64_OSVW_STATUS
:
3599 if (!guest_cpuid_has(vcpu
, X86_FEATURE_OSVW
))
3601 msr_info
->data
= vcpu
->arch
.osvw
.status
;
3603 case MSR_PLATFORM_INFO
:
3604 if (!msr_info
->host_initiated
&&
3605 !vcpu
->kvm
->arch
.guest_can_read_msr_platform_info
)
3607 msr_info
->data
= vcpu
->arch
.msr_platform_info
;
3609 case MSR_MISC_FEATURES_ENABLES
:
3610 msr_info
->data
= vcpu
->arch
.msr_misc_features_enables
;
3613 msr_info
->data
= vcpu
->arch
.msr_hwcr
;
3616 if (kvm_pmu_is_valid_msr(vcpu
, msr_info
->index
))
3617 return kvm_pmu_get_msr(vcpu
, msr_info
);
3618 return KVM_MSR_RET_INVALID
;
3622 EXPORT_SYMBOL_GPL(kvm_get_msr_common
);
3625 * Read or write a bunch of msrs. All parameters are kernel addresses.
3627 * @return number of msrs set successfully.
3629 static int __msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs
*msrs
,
3630 struct kvm_msr_entry
*entries
,
3631 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
3632 unsigned index
, u64
*data
))
3636 for (i
= 0; i
< msrs
->nmsrs
; ++i
)
3637 if (do_msr(vcpu
, entries
[i
].index
, &entries
[i
].data
))
3644 * Read or write a bunch of msrs. Parameters are user addresses.
3646 * @return number of msrs set successfully.
3648 static int msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs __user
*user_msrs
,
3649 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
3650 unsigned index
, u64
*data
),
3653 struct kvm_msrs msrs
;
3654 struct kvm_msr_entry
*entries
;
3659 if (copy_from_user(&msrs
, user_msrs
, sizeof(msrs
)))
3663 if (msrs
.nmsrs
>= MAX_IO_MSRS
)
3666 size
= sizeof(struct kvm_msr_entry
) * msrs
.nmsrs
;
3667 entries
= memdup_user(user_msrs
->entries
, size
);
3668 if (IS_ERR(entries
)) {
3669 r
= PTR_ERR(entries
);
3673 r
= n
= __msr_io(vcpu
, &msrs
, entries
, do_msr
);
3678 if (writeback
&& copy_to_user(user_msrs
->entries
, entries
, size
))
3689 static inline bool kvm_can_mwait_in_guest(void)
3691 return boot_cpu_has(X86_FEATURE_MWAIT
) &&
3692 !boot_cpu_has_bug(X86_BUG_MONITOR
) &&
3693 boot_cpu_has(X86_FEATURE_ARAT
);
3696 static int kvm_ioctl_get_supported_hv_cpuid(struct kvm_vcpu
*vcpu
,
3697 struct kvm_cpuid2 __user
*cpuid_arg
)
3699 struct kvm_cpuid2 cpuid
;
3703 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof(cpuid
)))
3706 r
= kvm_get_hv_cpuid(vcpu
, &cpuid
, cpuid_arg
->entries
);
3711 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof(cpuid
)))
3717 int kvm_vm_ioctl_check_extension(struct kvm
*kvm
, long ext
)
3722 case KVM_CAP_IRQCHIP
:
3724 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL
:
3725 case KVM_CAP_SET_TSS_ADDR
:
3726 case KVM_CAP_EXT_CPUID
:
3727 case KVM_CAP_EXT_EMUL_CPUID
:
3728 case KVM_CAP_CLOCKSOURCE
:
3730 case KVM_CAP_NOP_IO_DELAY
:
3731 case KVM_CAP_MP_STATE
:
3732 case KVM_CAP_SYNC_MMU
:
3733 case KVM_CAP_USER_NMI
:
3734 case KVM_CAP_REINJECT_CONTROL
:
3735 case KVM_CAP_IRQ_INJECT_STATUS
:
3736 case KVM_CAP_IOEVENTFD
:
3737 case KVM_CAP_IOEVENTFD_NO_LENGTH
:
3739 case KVM_CAP_PIT_STATE2
:
3740 case KVM_CAP_SET_IDENTITY_MAP_ADDR
:
3741 case KVM_CAP_XEN_HVM
:
3742 case KVM_CAP_VCPU_EVENTS
:
3743 case KVM_CAP_HYPERV
:
3744 case KVM_CAP_HYPERV_VAPIC
:
3745 case KVM_CAP_HYPERV_SPIN
:
3746 case KVM_CAP_HYPERV_SYNIC
:
3747 case KVM_CAP_HYPERV_SYNIC2
:
3748 case KVM_CAP_HYPERV_VP_INDEX
:
3749 case KVM_CAP_HYPERV_EVENTFD
:
3750 case KVM_CAP_HYPERV_TLBFLUSH
:
3751 case KVM_CAP_HYPERV_SEND_IPI
:
3752 case KVM_CAP_HYPERV_CPUID
:
3753 case KVM_CAP_SYS_HYPERV_CPUID
:
3754 case KVM_CAP_PCI_SEGMENT
:
3755 case KVM_CAP_DEBUGREGS
:
3756 case KVM_CAP_X86_ROBUST_SINGLESTEP
:
3758 case KVM_CAP_ASYNC_PF
:
3759 case KVM_CAP_ASYNC_PF_INT
:
3760 case KVM_CAP_GET_TSC_KHZ
:
3761 case KVM_CAP_KVMCLOCK_CTRL
:
3762 case KVM_CAP_READONLY_MEM
:
3763 case KVM_CAP_HYPERV_TIME
:
3764 case KVM_CAP_IOAPIC_POLARITY_IGNORED
:
3765 case KVM_CAP_TSC_DEADLINE_TIMER
:
3766 case KVM_CAP_DISABLE_QUIRKS
:
3767 case KVM_CAP_SET_BOOT_CPU_ID
:
3768 case KVM_CAP_SPLIT_IRQCHIP
:
3769 case KVM_CAP_IMMEDIATE_EXIT
:
3770 case KVM_CAP_PMU_EVENT_FILTER
:
3771 case KVM_CAP_GET_MSR_FEATURES
:
3772 case KVM_CAP_MSR_PLATFORM_INFO
:
3773 case KVM_CAP_EXCEPTION_PAYLOAD
:
3774 case KVM_CAP_SET_GUEST_DEBUG
:
3775 case KVM_CAP_LAST_CPU
:
3776 case KVM_CAP_X86_USER_SPACE_MSR
:
3777 case KVM_CAP_X86_MSR_FILTER
:
3778 case KVM_CAP_ENFORCE_PV_FEATURE_CPUID
:
3781 case KVM_CAP_SYNC_REGS
:
3782 r
= KVM_SYNC_X86_VALID_FIELDS
;
3784 case KVM_CAP_ADJUST_CLOCK
:
3785 r
= KVM_CLOCK_TSC_STABLE
;
3787 case KVM_CAP_X86_DISABLE_EXITS
:
3788 r
|= KVM_X86_DISABLE_EXITS_HLT
| KVM_X86_DISABLE_EXITS_PAUSE
|
3789 KVM_X86_DISABLE_EXITS_CSTATE
;
3790 if(kvm_can_mwait_in_guest())
3791 r
|= KVM_X86_DISABLE_EXITS_MWAIT
;
3793 case KVM_CAP_X86_SMM
:
3794 /* SMBASE is usually relocated above 1M on modern chipsets,
3795 * and SMM handlers might indeed rely on 4G segment limits,
3796 * so do not report SMM to be available if real mode is
3797 * emulated via vm86 mode. Still, do not go to great lengths
3798 * to avoid userspace's usage of the feature, because it is a
3799 * fringe case that is not enabled except via specific settings
3800 * of the module parameters.
3802 r
= kvm_x86_ops
.has_emulated_msr(kvm
, MSR_IA32_SMBASE
);
3805 r
= !kvm_x86_ops
.cpu_has_accelerated_tpr();
3807 case KVM_CAP_NR_VCPUS
:
3808 r
= KVM_SOFT_MAX_VCPUS
;
3810 case KVM_CAP_MAX_VCPUS
:
3813 case KVM_CAP_MAX_VCPU_ID
:
3814 r
= KVM_MAX_VCPU_ID
;
3816 case KVM_CAP_PV_MMU
: /* obsolete */
3820 r
= KVM_MAX_MCE_BANKS
;
3823 r
= boot_cpu_has(X86_FEATURE_XSAVE
);
3825 case KVM_CAP_TSC_CONTROL
:
3826 r
= kvm_has_tsc_control
;
3828 case KVM_CAP_X2APIC_API
:
3829 r
= KVM_X2APIC_API_VALID_FLAGS
;
3831 case KVM_CAP_NESTED_STATE
:
3832 r
= kvm_x86_ops
.nested_ops
->get_state
?
3833 kvm_x86_ops
.nested_ops
->get_state(NULL
, NULL
, 0) : 0;
3835 case KVM_CAP_HYPERV_DIRECT_TLBFLUSH
:
3836 r
= kvm_x86_ops
.enable_direct_tlbflush
!= NULL
;
3838 case KVM_CAP_HYPERV_ENLIGHTENED_VMCS
:
3839 r
= kvm_x86_ops
.nested_ops
->enable_evmcs
!= NULL
;
3841 case KVM_CAP_SMALLER_MAXPHYADDR
:
3842 r
= (int) allow_smaller_maxphyaddr
;
3844 case KVM_CAP_STEAL_TIME
:
3845 r
= sched_info_on();
3854 long kvm_arch_dev_ioctl(struct file
*filp
,
3855 unsigned int ioctl
, unsigned long arg
)
3857 void __user
*argp
= (void __user
*)arg
;
3861 case KVM_GET_MSR_INDEX_LIST
: {
3862 struct kvm_msr_list __user
*user_msr_list
= argp
;
3863 struct kvm_msr_list msr_list
;
3867 if (copy_from_user(&msr_list
, user_msr_list
, sizeof(msr_list
)))
3870 msr_list
.nmsrs
= num_msrs_to_save
+ num_emulated_msrs
;
3871 if (copy_to_user(user_msr_list
, &msr_list
, sizeof(msr_list
)))
3874 if (n
< msr_list
.nmsrs
)
3877 if (copy_to_user(user_msr_list
->indices
, &msrs_to_save
,
3878 num_msrs_to_save
* sizeof(u32
)))
3880 if (copy_to_user(user_msr_list
->indices
+ num_msrs_to_save
,
3882 num_emulated_msrs
* sizeof(u32
)))
3887 case KVM_GET_SUPPORTED_CPUID
:
3888 case KVM_GET_EMULATED_CPUID
: {
3889 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
3890 struct kvm_cpuid2 cpuid
;
3893 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof(cpuid
)))
3896 r
= kvm_dev_ioctl_get_cpuid(&cpuid
, cpuid_arg
->entries
,
3902 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof(cpuid
)))
3907 case KVM_X86_GET_MCE_CAP_SUPPORTED
:
3909 if (copy_to_user(argp
, &kvm_mce_cap_supported
,
3910 sizeof(kvm_mce_cap_supported
)))
3914 case KVM_GET_MSR_FEATURE_INDEX_LIST
: {
3915 struct kvm_msr_list __user
*user_msr_list
= argp
;
3916 struct kvm_msr_list msr_list
;
3920 if (copy_from_user(&msr_list
, user_msr_list
, sizeof(msr_list
)))
3923 msr_list
.nmsrs
= num_msr_based_features
;
3924 if (copy_to_user(user_msr_list
, &msr_list
, sizeof(msr_list
)))
3927 if (n
< msr_list
.nmsrs
)
3930 if (copy_to_user(user_msr_list
->indices
, &msr_based_features
,
3931 num_msr_based_features
* sizeof(u32
)))
3937 r
= msr_io(NULL
, argp
, do_get_msr_feature
, 1);
3939 case KVM_GET_SUPPORTED_HV_CPUID
:
3940 r
= kvm_ioctl_get_supported_hv_cpuid(NULL
, argp
);
3950 static void wbinvd_ipi(void *garbage
)
3955 static bool need_emulate_wbinvd(struct kvm_vcpu
*vcpu
)
3957 return kvm_arch_has_noncoherent_dma(vcpu
->kvm
);
3960 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
3962 /* Address WBINVD may be executed by guest */
3963 if (need_emulate_wbinvd(vcpu
)) {
3964 if (kvm_x86_ops
.has_wbinvd_exit())
3965 cpumask_set_cpu(cpu
, vcpu
->arch
.wbinvd_dirty_mask
);
3966 else if (vcpu
->cpu
!= -1 && vcpu
->cpu
!= cpu
)
3967 smp_call_function_single(vcpu
->cpu
,
3968 wbinvd_ipi
, NULL
, 1);
3971 kvm_x86_ops
.vcpu_load(vcpu
, cpu
);
3973 /* Save host pkru register if supported */
3974 vcpu
->arch
.host_pkru
= read_pkru();
3976 /* Apply any externally detected TSC adjustments (due to suspend) */
3977 if (unlikely(vcpu
->arch
.tsc_offset_adjustment
)) {
3978 adjust_tsc_offset_host(vcpu
, vcpu
->arch
.tsc_offset_adjustment
);
3979 vcpu
->arch
.tsc_offset_adjustment
= 0;
3980 kvm_make_request(KVM_REQ_CLOCK_UPDATE
, vcpu
);
3983 if (unlikely(vcpu
->cpu
!= cpu
) || kvm_check_tsc_unstable()) {
3984 s64 tsc_delta
= !vcpu
->arch
.last_host_tsc
? 0 :
3985 rdtsc() - vcpu
->arch
.last_host_tsc
;
3987 mark_tsc_unstable("KVM discovered backwards TSC");
3989 if (kvm_check_tsc_unstable()) {
3990 u64 offset
= kvm_compute_tsc_offset(vcpu
,
3991 vcpu
->arch
.last_guest_tsc
);
3992 kvm_vcpu_write_tsc_offset(vcpu
, offset
);
3993 vcpu
->arch
.tsc_catchup
= 1;
3996 if (kvm_lapic_hv_timer_in_use(vcpu
))
3997 kvm_lapic_restart_hv_timer(vcpu
);
4000 * On a host with synchronized TSC, there is no need to update
4001 * kvmclock on vcpu->cpu migration
4003 if (!vcpu
->kvm
->arch
.use_master_clock
|| vcpu
->cpu
== -1)
4004 kvm_make_request(KVM_REQ_GLOBAL_CLOCK_UPDATE
, vcpu
);
4005 if (vcpu
->cpu
!= cpu
)
4006 kvm_make_request(KVM_REQ_MIGRATE_TIMER
, vcpu
);
4010 kvm_make_request(KVM_REQ_STEAL_UPDATE
, vcpu
);
4013 static void kvm_steal_time_set_preempted(struct kvm_vcpu
*vcpu
)
4015 struct kvm_host_map map
;
4016 struct kvm_steal_time
*st
;
4018 if (!(vcpu
->arch
.st
.msr_val
& KVM_MSR_ENABLED
))
4021 if (vcpu
->arch
.st
.preempted
)
4024 if (kvm_map_gfn(vcpu
, vcpu
->arch
.st
.msr_val
>> PAGE_SHIFT
, &map
,
4025 &vcpu
->arch
.st
.cache
, true))
4029 offset_in_page(vcpu
->arch
.st
.msr_val
& KVM_STEAL_VALID_BITS
);
4031 st
->preempted
= vcpu
->arch
.st
.preempted
= KVM_VCPU_PREEMPTED
;
4033 kvm_unmap_gfn(vcpu
, &map
, &vcpu
->arch
.st
.cache
, true, true);
4036 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
)
4040 if (vcpu
->preempted
&& !vcpu
->arch
.guest_state_protected
)
4041 vcpu
->arch
.preempted_in_kernel
= !kvm_x86_ops
.get_cpl(vcpu
);
4044 * kvm_memslots() will be called by
4045 * kvm_write_guest_offset_cached() so take the srcu lock.
4047 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
4048 kvm_steal_time_set_preempted(vcpu
);
4049 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
4050 kvm_x86_ops
.vcpu_put(vcpu
);
4051 vcpu
->arch
.last_host_tsc
= rdtsc();
4053 * If userspace has set any breakpoints or watchpoints, dr6 is restored
4054 * on every vmexit, but if not, we might have a stale dr6 from the
4055 * guest. do_debug expects dr6 to be cleared after it runs, do the same.
4060 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu
*vcpu
,
4061 struct kvm_lapic_state
*s
)
4063 if (vcpu
->arch
.apicv_active
)
4064 kvm_x86_ops
.sync_pir_to_irr(vcpu
);
4066 return kvm_apic_get_state(vcpu
, s
);
4069 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu
*vcpu
,
4070 struct kvm_lapic_state
*s
)
4074 r
= kvm_apic_set_state(vcpu
, s
);
4077 update_cr8_intercept(vcpu
);
4082 static int kvm_cpu_accept_dm_intr(struct kvm_vcpu
*vcpu
)
4085 * We can accept userspace's request for interrupt injection
4086 * as long as we have a place to store the interrupt number.
4087 * The actual injection will happen when the CPU is able to
4088 * deliver the interrupt.
4090 if (kvm_cpu_has_extint(vcpu
))
4093 /* Acknowledging ExtINT does not happen if LINT0 is masked. */
4094 return (!lapic_in_kernel(vcpu
) ||
4095 kvm_apic_accept_pic_intr(vcpu
));
4098 static int kvm_vcpu_ready_for_interrupt_injection(struct kvm_vcpu
*vcpu
)
4100 return kvm_arch_interrupt_allowed(vcpu
) &&
4101 kvm_cpu_accept_dm_intr(vcpu
);
4104 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu
*vcpu
,
4105 struct kvm_interrupt
*irq
)
4107 if (irq
->irq
>= KVM_NR_INTERRUPTS
)
4110 if (!irqchip_in_kernel(vcpu
->kvm
)) {
4111 kvm_queue_interrupt(vcpu
, irq
->irq
, false);
4112 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
4117 * With in-kernel LAPIC, we only use this to inject EXTINT, so
4118 * fail for in-kernel 8259.
4120 if (pic_in_kernel(vcpu
->kvm
))
4123 if (vcpu
->arch
.pending_external_vector
!= -1)
4126 vcpu
->arch
.pending_external_vector
= irq
->irq
;
4127 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
4131 static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu
*vcpu
)
4133 kvm_inject_nmi(vcpu
);
4138 static int kvm_vcpu_ioctl_smi(struct kvm_vcpu
*vcpu
)
4140 kvm_make_request(KVM_REQ_SMI
, vcpu
);
4145 static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu
*vcpu
,
4146 struct kvm_tpr_access_ctl
*tac
)
4150 vcpu
->arch
.tpr_access_reporting
= !!tac
->enabled
;
4154 static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu
*vcpu
,
4158 unsigned bank_num
= mcg_cap
& 0xff, bank
;
4161 if (!bank_num
|| bank_num
> KVM_MAX_MCE_BANKS
)
4163 if (mcg_cap
& ~(kvm_mce_cap_supported
| 0xff | 0xff0000))
4166 vcpu
->arch
.mcg_cap
= mcg_cap
;
4167 /* Init IA32_MCG_CTL to all 1s */
4168 if (mcg_cap
& MCG_CTL_P
)
4169 vcpu
->arch
.mcg_ctl
= ~(u64
)0;
4170 /* Init IA32_MCi_CTL to all 1s */
4171 for (bank
= 0; bank
< bank_num
; bank
++)
4172 vcpu
->arch
.mce_banks
[bank
*4] = ~(u64
)0;
4174 kvm_x86_ops
.setup_mce(vcpu
);
4179 static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu
*vcpu
,
4180 struct kvm_x86_mce
*mce
)
4182 u64 mcg_cap
= vcpu
->arch
.mcg_cap
;
4183 unsigned bank_num
= mcg_cap
& 0xff;
4184 u64
*banks
= vcpu
->arch
.mce_banks
;
4186 if (mce
->bank
>= bank_num
|| !(mce
->status
& MCI_STATUS_VAL
))
4189 * if IA32_MCG_CTL is not all 1s, the uncorrected error
4190 * reporting is disabled
4192 if ((mce
->status
& MCI_STATUS_UC
) && (mcg_cap
& MCG_CTL_P
) &&
4193 vcpu
->arch
.mcg_ctl
!= ~(u64
)0)
4195 banks
+= 4 * mce
->bank
;
4197 * if IA32_MCi_CTL is not all 1s, the uncorrected error
4198 * reporting is disabled for the bank
4200 if ((mce
->status
& MCI_STATUS_UC
) && banks
[0] != ~(u64
)0)
4202 if (mce
->status
& MCI_STATUS_UC
) {
4203 if ((vcpu
->arch
.mcg_status
& MCG_STATUS_MCIP
) ||
4204 !kvm_read_cr4_bits(vcpu
, X86_CR4_MCE
)) {
4205 kvm_make_request(KVM_REQ_TRIPLE_FAULT
, vcpu
);
4208 if (banks
[1] & MCI_STATUS_VAL
)
4209 mce
->status
|= MCI_STATUS_OVER
;
4210 banks
[2] = mce
->addr
;
4211 banks
[3] = mce
->misc
;
4212 vcpu
->arch
.mcg_status
= mce
->mcg_status
;
4213 banks
[1] = mce
->status
;
4214 kvm_queue_exception(vcpu
, MC_VECTOR
);
4215 } else if (!(banks
[1] & MCI_STATUS_VAL
)
4216 || !(banks
[1] & MCI_STATUS_UC
)) {
4217 if (banks
[1] & MCI_STATUS_VAL
)
4218 mce
->status
|= MCI_STATUS_OVER
;
4219 banks
[2] = mce
->addr
;
4220 banks
[3] = mce
->misc
;
4221 banks
[1] = mce
->status
;
4223 banks
[1] |= MCI_STATUS_OVER
;
4227 static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu
*vcpu
,
4228 struct kvm_vcpu_events
*events
)
4232 if (kvm_check_request(KVM_REQ_SMI
, vcpu
))
4236 * In guest mode, payload delivery should be deferred,
4237 * so that the L1 hypervisor can intercept #PF before
4238 * CR2 is modified (or intercept #DB before DR6 is
4239 * modified under nVMX). Unless the per-VM capability,
4240 * KVM_CAP_EXCEPTION_PAYLOAD, is set, we may not defer the delivery of
4241 * an exception payload and handle after a KVM_GET_VCPU_EVENTS. Since we
4242 * opportunistically defer the exception payload, deliver it if the
4243 * capability hasn't been requested before processing a
4244 * KVM_GET_VCPU_EVENTS.
4246 if (!vcpu
->kvm
->arch
.exception_payload_enabled
&&
4247 vcpu
->arch
.exception
.pending
&& vcpu
->arch
.exception
.has_payload
)
4248 kvm_deliver_exception_payload(vcpu
);
4251 * The API doesn't provide the instruction length for software
4252 * exceptions, so don't report them. As long as the guest RIP
4253 * isn't advanced, we should expect to encounter the exception
4256 if (kvm_exception_is_soft(vcpu
->arch
.exception
.nr
)) {
4257 events
->exception
.injected
= 0;
4258 events
->exception
.pending
= 0;
4260 events
->exception
.injected
= vcpu
->arch
.exception
.injected
;
4261 events
->exception
.pending
= vcpu
->arch
.exception
.pending
;
4263 * For ABI compatibility, deliberately conflate
4264 * pending and injected exceptions when
4265 * KVM_CAP_EXCEPTION_PAYLOAD isn't enabled.
4267 if (!vcpu
->kvm
->arch
.exception_payload_enabled
)
4268 events
->exception
.injected
|=
4269 vcpu
->arch
.exception
.pending
;
4271 events
->exception
.nr
= vcpu
->arch
.exception
.nr
;
4272 events
->exception
.has_error_code
= vcpu
->arch
.exception
.has_error_code
;
4273 events
->exception
.error_code
= vcpu
->arch
.exception
.error_code
;
4274 events
->exception_has_payload
= vcpu
->arch
.exception
.has_payload
;
4275 events
->exception_payload
= vcpu
->arch
.exception
.payload
;
4277 events
->interrupt
.injected
=
4278 vcpu
->arch
.interrupt
.injected
&& !vcpu
->arch
.interrupt
.soft
;
4279 events
->interrupt
.nr
= vcpu
->arch
.interrupt
.nr
;
4280 events
->interrupt
.soft
= 0;
4281 events
->interrupt
.shadow
= kvm_x86_ops
.get_interrupt_shadow(vcpu
);
4283 events
->nmi
.injected
= vcpu
->arch
.nmi_injected
;
4284 events
->nmi
.pending
= vcpu
->arch
.nmi_pending
!= 0;
4285 events
->nmi
.masked
= kvm_x86_ops
.get_nmi_mask(vcpu
);
4286 events
->nmi
.pad
= 0;
4288 events
->sipi_vector
= 0; /* never valid when reporting to user space */
4290 events
->smi
.smm
= is_smm(vcpu
);
4291 events
->smi
.pending
= vcpu
->arch
.smi_pending
;
4292 events
->smi
.smm_inside_nmi
=
4293 !!(vcpu
->arch
.hflags
& HF_SMM_INSIDE_NMI_MASK
);
4294 events
->smi
.latched_init
= kvm_lapic_latched_init(vcpu
);
4296 events
->flags
= (KVM_VCPUEVENT_VALID_NMI_PENDING
4297 | KVM_VCPUEVENT_VALID_SHADOW
4298 | KVM_VCPUEVENT_VALID_SMM
);
4299 if (vcpu
->kvm
->arch
.exception_payload_enabled
)
4300 events
->flags
|= KVM_VCPUEVENT_VALID_PAYLOAD
;
4302 memset(&events
->reserved
, 0, sizeof(events
->reserved
));
4305 static void kvm_smm_changed(struct kvm_vcpu
*vcpu
);
4307 static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu
*vcpu
,
4308 struct kvm_vcpu_events
*events
)
4310 if (events
->flags
& ~(KVM_VCPUEVENT_VALID_NMI_PENDING
4311 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
4312 | KVM_VCPUEVENT_VALID_SHADOW
4313 | KVM_VCPUEVENT_VALID_SMM
4314 | KVM_VCPUEVENT_VALID_PAYLOAD
))
4317 if (events
->flags
& KVM_VCPUEVENT_VALID_PAYLOAD
) {
4318 if (!vcpu
->kvm
->arch
.exception_payload_enabled
)
4320 if (events
->exception
.pending
)
4321 events
->exception
.injected
= 0;
4323 events
->exception_has_payload
= 0;
4325 events
->exception
.pending
= 0;
4326 events
->exception_has_payload
= 0;
4329 if ((events
->exception
.injected
|| events
->exception
.pending
) &&
4330 (events
->exception
.nr
> 31 || events
->exception
.nr
== NMI_VECTOR
))
4333 /* INITs are latched while in SMM */
4334 if (events
->flags
& KVM_VCPUEVENT_VALID_SMM
&&
4335 (events
->smi
.smm
|| events
->smi
.pending
) &&
4336 vcpu
->arch
.mp_state
== KVM_MP_STATE_INIT_RECEIVED
)
4340 vcpu
->arch
.exception
.injected
= events
->exception
.injected
;
4341 vcpu
->arch
.exception
.pending
= events
->exception
.pending
;
4342 vcpu
->arch
.exception
.nr
= events
->exception
.nr
;
4343 vcpu
->arch
.exception
.has_error_code
= events
->exception
.has_error_code
;
4344 vcpu
->arch
.exception
.error_code
= events
->exception
.error_code
;
4345 vcpu
->arch
.exception
.has_payload
= events
->exception_has_payload
;
4346 vcpu
->arch
.exception
.payload
= events
->exception_payload
;
4348 vcpu
->arch
.interrupt
.injected
= events
->interrupt
.injected
;
4349 vcpu
->arch
.interrupt
.nr
= events
->interrupt
.nr
;
4350 vcpu
->arch
.interrupt
.soft
= events
->interrupt
.soft
;
4351 if (events
->flags
& KVM_VCPUEVENT_VALID_SHADOW
)
4352 kvm_x86_ops
.set_interrupt_shadow(vcpu
,
4353 events
->interrupt
.shadow
);
4355 vcpu
->arch
.nmi_injected
= events
->nmi
.injected
;
4356 if (events
->flags
& KVM_VCPUEVENT_VALID_NMI_PENDING
)
4357 vcpu
->arch
.nmi_pending
= events
->nmi
.pending
;
4358 kvm_x86_ops
.set_nmi_mask(vcpu
, events
->nmi
.masked
);
4360 if (events
->flags
& KVM_VCPUEVENT_VALID_SIPI_VECTOR
&&
4361 lapic_in_kernel(vcpu
))
4362 vcpu
->arch
.apic
->sipi_vector
= events
->sipi_vector
;
4364 if (events
->flags
& KVM_VCPUEVENT_VALID_SMM
) {
4365 if (!!(vcpu
->arch
.hflags
& HF_SMM_MASK
) != events
->smi
.smm
) {
4366 if (events
->smi
.smm
)
4367 vcpu
->arch
.hflags
|= HF_SMM_MASK
;
4369 vcpu
->arch
.hflags
&= ~HF_SMM_MASK
;
4370 kvm_smm_changed(vcpu
);
4373 vcpu
->arch
.smi_pending
= events
->smi
.pending
;
4375 if (events
->smi
.smm
) {
4376 if (events
->smi
.smm_inside_nmi
)
4377 vcpu
->arch
.hflags
|= HF_SMM_INSIDE_NMI_MASK
;
4379 vcpu
->arch
.hflags
&= ~HF_SMM_INSIDE_NMI_MASK
;
4382 if (lapic_in_kernel(vcpu
)) {
4383 if (events
->smi
.latched_init
)
4384 set_bit(KVM_APIC_INIT
, &vcpu
->arch
.apic
->pending_events
);
4386 clear_bit(KVM_APIC_INIT
, &vcpu
->arch
.apic
->pending_events
);
4390 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
4395 static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu
*vcpu
,
4396 struct kvm_debugregs
*dbgregs
)
4400 memcpy(dbgregs
->db
, vcpu
->arch
.db
, sizeof(vcpu
->arch
.db
));
4401 kvm_get_dr(vcpu
, 6, &val
);
4403 dbgregs
->dr7
= vcpu
->arch
.dr7
;
4405 memset(&dbgregs
->reserved
, 0, sizeof(dbgregs
->reserved
));
4408 static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu
*vcpu
,
4409 struct kvm_debugregs
*dbgregs
)
4414 if (dbgregs
->dr6
& ~0xffffffffull
)
4416 if (dbgregs
->dr7
& ~0xffffffffull
)
4419 memcpy(vcpu
->arch
.db
, dbgregs
->db
, sizeof(vcpu
->arch
.db
));
4420 kvm_update_dr0123(vcpu
);
4421 vcpu
->arch
.dr6
= dbgregs
->dr6
;
4422 vcpu
->arch
.dr7
= dbgregs
->dr7
;
4423 kvm_update_dr7(vcpu
);
4428 #define XSTATE_COMPACTION_ENABLED (1ULL << 63)
4430 static void fill_xsave(u8
*dest
, struct kvm_vcpu
*vcpu
)
4432 struct xregs_state
*xsave
= &vcpu
->arch
.guest_fpu
->state
.xsave
;
4433 u64 xstate_bv
= xsave
->header
.xfeatures
;
4437 * Copy legacy XSAVE area, to avoid complications with CPUID
4438 * leaves 0 and 1 in the loop below.
4440 memcpy(dest
, xsave
, XSAVE_HDR_OFFSET
);
4443 xstate_bv
&= vcpu
->arch
.guest_supported_xcr0
| XFEATURE_MASK_FPSSE
;
4444 *(u64
*)(dest
+ XSAVE_HDR_OFFSET
) = xstate_bv
;
4447 * Copy each region from the possibly compacted offset to the
4448 * non-compacted offset.
4450 valid
= xstate_bv
& ~XFEATURE_MASK_FPSSE
;
4452 u64 xfeature_mask
= valid
& -valid
;
4453 int xfeature_nr
= fls64(xfeature_mask
) - 1;
4454 void *src
= get_xsave_addr(xsave
, xfeature_nr
);
4457 u32 size
, offset
, ecx
, edx
;
4458 cpuid_count(XSTATE_CPUID
, xfeature_nr
,
4459 &size
, &offset
, &ecx
, &edx
);
4460 if (xfeature_nr
== XFEATURE_PKRU
)
4461 memcpy(dest
+ offset
, &vcpu
->arch
.pkru
,
4462 sizeof(vcpu
->arch
.pkru
));
4464 memcpy(dest
+ offset
, src
, size
);
4468 valid
-= xfeature_mask
;
4472 static void load_xsave(struct kvm_vcpu
*vcpu
, u8
*src
)
4474 struct xregs_state
*xsave
= &vcpu
->arch
.guest_fpu
->state
.xsave
;
4475 u64 xstate_bv
= *(u64
*)(src
+ XSAVE_HDR_OFFSET
);
4479 * Copy legacy XSAVE area, to avoid complications with CPUID
4480 * leaves 0 and 1 in the loop below.
4482 memcpy(xsave
, src
, XSAVE_HDR_OFFSET
);
4484 /* Set XSTATE_BV and possibly XCOMP_BV. */
4485 xsave
->header
.xfeatures
= xstate_bv
;
4486 if (boot_cpu_has(X86_FEATURE_XSAVES
))
4487 xsave
->header
.xcomp_bv
= host_xcr0
| XSTATE_COMPACTION_ENABLED
;
4490 * Copy each region from the non-compacted offset to the
4491 * possibly compacted offset.
4493 valid
= xstate_bv
& ~XFEATURE_MASK_FPSSE
;
4495 u64 xfeature_mask
= valid
& -valid
;
4496 int xfeature_nr
= fls64(xfeature_mask
) - 1;
4497 void *dest
= get_xsave_addr(xsave
, xfeature_nr
);
4500 u32 size
, offset
, ecx
, edx
;
4501 cpuid_count(XSTATE_CPUID
, xfeature_nr
,
4502 &size
, &offset
, &ecx
, &edx
);
4503 if (xfeature_nr
== XFEATURE_PKRU
)
4504 memcpy(&vcpu
->arch
.pkru
, src
+ offset
,
4505 sizeof(vcpu
->arch
.pkru
));
4507 memcpy(dest
, src
+ offset
, size
);
4510 valid
-= xfeature_mask
;
4514 static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu
*vcpu
,
4515 struct kvm_xsave
*guest_xsave
)
4517 if (!vcpu
->arch
.guest_fpu
)
4520 if (boot_cpu_has(X86_FEATURE_XSAVE
)) {
4521 memset(guest_xsave
, 0, sizeof(struct kvm_xsave
));
4522 fill_xsave((u8
*) guest_xsave
->region
, vcpu
);
4524 memcpy(guest_xsave
->region
,
4525 &vcpu
->arch
.guest_fpu
->state
.fxsave
,
4526 sizeof(struct fxregs_state
));
4527 *(u64
*)&guest_xsave
->region
[XSAVE_HDR_OFFSET
/ sizeof(u32
)] =
4528 XFEATURE_MASK_FPSSE
;
4532 #define XSAVE_MXCSR_OFFSET 24
4534 static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu
*vcpu
,
4535 struct kvm_xsave
*guest_xsave
)
4540 if (!vcpu
->arch
.guest_fpu
)
4543 xstate_bv
= *(u64
*)&guest_xsave
->region
[XSAVE_HDR_OFFSET
/ sizeof(u32
)];
4544 mxcsr
= *(u32
*)&guest_xsave
->region
[XSAVE_MXCSR_OFFSET
/ sizeof(u32
)];
4546 if (boot_cpu_has(X86_FEATURE_XSAVE
)) {
4548 * Here we allow setting states that are not present in
4549 * CPUID leaf 0xD, index 0, EDX:EAX. This is for compatibility
4550 * with old userspace.
4552 if (xstate_bv
& ~supported_xcr0
|| mxcsr
& ~mxcsr_feature_mask
)
4554 load_xsave(vcpu
, (u8
*)guest_xsave
->region
);
4556 if (xstate_bv
& ~XFEATURE_MASK_FPSSE
||
4557 mxcsr
& ~mxcsr_feature_mask
)
4559 memcpy(&vcpu
->arch
.guest_fpu
->state
.fxsave
,
4560 guest_xsave
->region
, sizeof(struct fxregs_state
));
4565 static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu
*vcpu
,
4566 struct kvm_xcrs
*guest_xcrs
)
4568 if (!boot_cpu_has(X86_FEATURE_XSAVE
)) {
4569 guest_xcrs
->nr_xcrs
= 0;
4573 guest_xcrs
->nr_xcrs
= 1;
4574 guest_xcrs
->flags
= 0;
4575 guest_xcrs
->xcrs
[0].xcr
= XCR_XFEATURE_ENABLED_MASK
;
4576 guest_xcrs
->xcrs
[0].value
= vcpu
->arch
.xcr0
;
4579 static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu
*vcpu
,
4580 struct kvm_xcrs
*guest_xcrs
)
4584 if (!boot_cpu_has(X86_FEATURE_XSAVE
))
4587 if (guest_xcrs
->nr_xcrs
> KVM_MAX_XCRS
|| guest_xcrs
->flags
)
4590 for (i
= 0; i
< guest_xcrs
->nr_xcrs
; i
++)
4591 /* Only support XCR0 currently */
4592 if (guest_xcrs
->xcrs
[i
].xcr
== XCR_XFEATURE_ENABLED_MASK
) {
4593 r
= __kvm_set_xcr(vcpu
, XCR_XFEATURE_ENABLED_MASK
,
4594 guest_xcrs
->xcrs
[i
].value
);
4603 * kvm_set_guest_paused() indicates to the guest kernel that it has been
4604 * stopped by the hypervisor. This function will be called from the host only.
4605 * EINVAL is returned when the host attempts to set the flag for a guest that
4606 * does not support pv clocks.
4608 static int kvm_set_guest_paused(struct kvm_vcpu
*vcpu
)
4610 if (!vcpu
->arch
.pv_time_enabled
)
4612 vcpu
->arch
.pvclock_set_guest_stopped_request
= true;
4613 kvm_make_request(KVM_REQ_CLOCK_UPDATE
, vcpu
);
4617 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu
*vcpu
,
4618 struct kvm_enable_cap
*cap
)
4621 uint16_t vmcs_version
;
4622 void __user
*user_ptr
;
4628 case KVM_CAP_HYPERV_SYNIC2
:
4633 case KVM_CAP_HYPERV_SYNIC
:
4634 if (!irqchip_in_kernel(vcpu
->kvm
))
4636 return kvm_hv_activate_synic(vcpu
, cap
->cap
==
4637 KVM_CAP_HYPERV_SYNIC2
);
4638 case KVM_CAP_HYPERV_ENLIGHTENED_VMCS
:
4639 if (!kvm_x86_ops
.nested_ops
->enable_evmcs
)
4641 r
= kvm_x86_ops
.nested_ops
->enable_evmcs(vcpu
, &vmcs_version
);
4643 user_ptr
= (void __user
*)(uintptr_t)cap
->args
[0];
4644 if (copy_to_user(user_ptr
, &vmcs_version
,
4645 sizeof(vmcs_version
)))
4649 case KVM_CAP_HYPERV_DIRECT_TLBFLUSH
:
4650 if (!kvm_x86_ops
.enable_direct_tlbflush
)
4653 return kvm_x86_ops
.enable_direct_tlbflush(vcpu
);
4655 case KVM_CAP_ENFORCE_PV_FEATURE_CPUID
:
4656 vcpu
->arch
.pv_cpuid
.enforce
= cap
->args
[0];
4657 if (vcpu
->arch
.pv_cpuid
.enforce
)
4658 kvm_update_pv_runtime(vcpu
);
4667 long kvm_arch_vcpu_ioctl(struct file
*filp
,
4668 unsigned int ioctl
, unsigned long arg
)
4670 struct kvm_vcpu
*vcpu
= filp
->private_data
;
4671 void __user
*argp
= (void __user
*)arg
;
4674 struct kvm_lapic_state
*lapic
;
4675 struct kvm_xsave
*xsave
;
4676 struct kvm_xcrs
*xcrs
;
4684 case KVM_GET_LAPIC
: {
4686 if (!lapic_in_kernel(vcpu
))
4688 u
.lapic
= kzalloc(sizeof(struct kvm_lapic_state
),
4689 GFP_KERNEL_ACCOUNT
);
4694 r
= kvm_vcpu_ioctl_get_lapic(vcpu
, u
.lapic
);
4698 if (copy_to_user(argp
, u
.lapic
, sizeof(struct kvm_lapic_state
)))
4703 case KVM_SET_LAPIC
: {
4705 if (!lapic_in_kernel(vcpu
))
4707 u
.lapic
= memdup_user(argp
, sizeof(*u
.lapic
));
4708 if (IS_ERR(u
.lapic
)) {
4709 r
= PTR_ERR(u
.lapic
);
4713 r
= kvm_vcpu_ioctl_set_lapic(vcpu
, u
.lapic
);
4716 case KVM_INTERRUPT
: {
4717 struct kvm_interrupt irq
;
4720 if (copy_from_user(&irq
, argp
, sizeof(irq
)))
4722 r
= kvm_vcpu_ioctl_interrupt(vcpu
, &irq
);
4726 r
= kvm_vcpu_ioctl_nmi(vcpu
);
4730 r
= kvm_vcpu_ioctl_smi(vcpu
);
4733 case KVM_SET_CPUID
: {
4734 struct kvm_cpuid __user
*cpuid_arg
= argp
;
4735 struct kvm_cpuid cpuid
;
4738 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof(cpuid
)))
4740 r
= kvm_vcpu_ioctl_set_cpuid(vcpu
, &cpuid
, cpuid_arg
->entries
);
4743 case KVM_SET_CPUID2
: {
4744 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
4745 struct kvm_cpuid2 cpuid
;
4748 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof(cpuid
)))
4750 r
= kvm_vcpu_ioctl_set_cpuid2(vcpu
, &cpuid
,
4751 cpuid_arg
->entries
);
4754 case KVM_GET_CPUID2
: {
4755 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
4756 struct kvm_cpuid2 cpuid
;
4759 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof(cpuid
)))
4761 r
= kvm_vcpu_ioctl_get_cpuid2(vcpu
, &cpuid
,
4762 cpuid_arg
->entries
);
4766 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof(cpuid
)))
4771 case KVM_GET_MSRS
: {
4772 int idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
4773 r
= msr_io(vcpu
, argp
, do_get_msr
, 1);
4774 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
4777 case KVM_SET_MSRS
: {
4778 int idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
4779 r
= msr_io(vcpu
, argp
, do_set_msr
, 0);
4780 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
4783 case KVM_TPR_ACCESS_REPORTING
: {
4784 struct kvm_tpr_access_ctl tac
;
4787 if (copy_from_user(&tac
, argp
, sizeof(tac
)))
4789 r
= vcpu_ioctl_tpr_access_reporting(vcpu
, &tac
);
4793 if (copy_to_user(argp
, &tac
, sizeof(tac
)))
4798 case KVM_SET_VAPIC_ADDR
: {
4799 struct kvm_vapic_addr va
;
4803 if (!lapic_in_kernel(vcpu
))
4806 if (copy_from_user(&va
, argp
, sizeof(va
)))
4808 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
4809 r
= kvm_lapic_set_vapic_addr(vcpu
, va
.vapic_addr
);
4810 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
4813 case KVM_X86_SETUP_MCE
: {
4817 if (copy_from_user(&mcg_cap
, argp
, sizeof(mcg_cap
)))
4819 r
= kvm_vcpu_ioctl_x86_setup_mce(vcpu
, mcg_cap
);
4822 case KVM_X86_SET_MCE
: {
4823 struct kvm_x86_mce mce
;
4826 if (copy_from_user(&mce
, argp
, sizeof(mce
)))
4828 r
= kvm_vcpu_ioctl_x86_set_mce(vcpu
, &mce
);
4831 case KVM_GET_VCPU_EVENTS
: {
4832 struct kvm_vcpu_events events
;
4834 kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu
, &events
);
4837 if (copy_to_user(argp
, &events
, sizeof(struct kvm_vcpu_events
)))
4842 case KVM_SET_VCPU_EVENTS
: {
4843 struct kvm_vcpu_events events
;
4846 if (copy_from_user(&events
, argp
, sizeof(struct kvm_vcpu_events
)))
4849 r
= kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu
, &events
);
4852 case KVM_GET_DEBUGREGS
: {
4853 struct kvm_debugregs dbgregs
;
4855 kvm_vcpu_ioctl_x86_get_debugregs(vcpu
, &dbgregs
);
4858 if (copy_to_user(argp
, &dbgregs
,
4859 sizeof(struct kvm_debugregs
)))
4864 case KVM_SET_DEBUGREGS
: {
4865 struct kvm_debugregs dbgregs
;
4868 if (copy_from_user(&dbgregs
, argp
,
4869 sizeof(struct kvm_debugregs
)))
4872 r
= kvm_vcpu_ioctl_x86_set_debugregs(vcpu
, &dbgregs
);
4875 case KVM_GET_XSAVE
: {
4876 u
.xsave
= kzalloc(sizeof(struct kvm_xsave
), GFP_KERNEL_ACCOUNT
);
4881 kvm_vcpu_ioctl_x86_get_xsave(vcpu
, u
.xsave
);
4884 if (copy_to_user(argp
, u
.xsave
, sizeof(struct kvm_xsave
)))
4889 case KVM_SET_XSAVE
: {
4890 u
.xsave
= memdup_user(argp
, sizeof(*u
.xsave
));
4891 if (IS_ERR(u
.xsave
)) {
4892 r
= PTR_ERR(u
.xsave
);
4896 r
= kvm_vcpu_ioctl_x86_set_xsave(vcpu
, u
.xsave
);
4899 case KVM_GET_XCRS
: {
4900 u
.xcrs
= kzalloc(sizeof(struct kvm_xcrs
), GFP_KERNEL_ACCOUNT
);
4905 kvm_vcpu_ioctl_x86_get_xcrs(vcpu
, u
.xcrs
);
4908 if (copy_to_user(argp
, u
.xcrs
,
4909 sizeof(struct kvm_xcrs
)))
4914 case KVM_SET_XCRS
: {
4915 u
.xcrs
= memdup_user(argp
, sizeof(*u
.xcrs
));
4916 if (IS_ERR(u
.xcrs
)) {
4917 r
= PTR_ERR(u
.xcrs
);
4921 r
= kvm_vcpu_ioctl_x86_set_xcrs(vcpu
, u
.xcrs
);
4924 case KVM_SET_TSC_KHZ
: {
4928 user_tsc_khz
= (u32
)arg
;
4930 if (kvm_has_tsc_control
&&
4931 user_tsc_khz
>= kvm_max_guest_tsc_khz
)
4934 if (user_tsc_khz
== 0)
4935 user_tsc_khz
= tsc_khz
;
4937 if (!kvm_set_tsc_khz(vcpu
, user_tsc_khz
))
4942 case KVM_GET_TSC_KHZ
: {
4943 r
= vcpu
->arch
.virtual_tsc_khz
;
4946 case KVM_KVMCLOCK_CTRL
: {
4947 r
= kvm_set_guest_paused(vcpu
);
4950 case KVM_ENABLE_CAP
: {
4951 struct kvm_enable_cap cap
;
4954 if (copy_from_user(&cap
, argp
, sizeof(cap
)))
4956 r
= kvm_vcpu_ioctl_enable_cap(vcpu
, &cap
);
4959 case KVM_GET_NESTED_STATE
: {
4960 struct kvm_nested_state __user
*user_kvm_nested_state
= argp
;
4964 if (!kvm_x86_ops
.nested_ops
->get_state
)
4967 BUILD_BUG_ON(sizeof(user_data_size
) != sizeof(user_kvm_nested_state
->size
));
4969 if (get_user(user_data_size
, &user_kvm_nested_state
->size
))
4972 r
= kvm_x86_ops
.nested_ops
->get_state(vcpu
, user_kvm_nested_state
,
4977 if (r
> user_data_size
) {
4978 if (put_user(r
, &user_kvm_nested_state
->size
))
4988 case KVM_SET_NESTED_STATE
: {
4989 struct kvm_nested_state __user
*user_kvm_nested_state
= argp
;
4990 struct kvm_nested_state kvm_state
;
4994 if (!kvm_x86_ops
.nested_ops
->set_state
)
4998 if (copy_from_user(&kvm_state
, user_kvm_nested_state
, sizeof(kvm_state
)))
5002 if (kvm_state
.size
< sizeof(kvm_state
))
5005 if (kvm_state
.flags
&
5006 ~(KVM_STATE_NESTED_RUN_PENDING
| KVM_STATE_NESTED_GUEST_MODE
5007 | KVM_STATE_NESTED_EVMCS
| KVM_STATE_NESTED_MTF_PENDING
5008 | KVM_STATE_NESTED_GIF_SET
))
5011 /* nested_run_pending implies guest_mode. */
5012 if ((kvm_state
.flags
& KVM_STATE_NESTED_RUN_PENDING
)
5013 && !(kvm_state
.flags
& KVM_STATE_NESTED_GUEST_MODE
))
5016 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
5017 r
= kvm_x86_ops
.nested_ops
->set_state(vcpu
, user_kvm_nested_state
, &kvm_state
);
5018 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
5021 case KVM_GET_SUPPORTED_HV_CPUID
:
5022 r
= kvm_ioctl_get_supported_hv_cpuid(vcpu
, argp
);
5034 vm_fault_t
kvm_arch_vcpu_fault(struct kvm_vcpu
*vcpu
, struct vm_fault
*vmf
)
5036 return VM_FAULT_SIGBUS
;
5039 static int kvm_vm_ioctl_set_tss_addr(struct kvm
*kvm
, unsigned long addr
)
5043 if (addr
> (unsigned int)(-3 * PAGE_SIZE
))
5045 ret
= kvm_x86_ops
.set_tss_addr(kvm
, addr
);
5049 static int kvm_vm_ioctl_set_identity_map_addr(struct kvm
*kvm
,
5052 return kvm_x86_ops
.set_identity_map_addr(kvm
, ident_addr
);
5055 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm
*kvm
,
5056 unsigned long kvm_nr_mmu_pages
)
5058 if (kvm_nr_mmu_pages
< KVM_MIN_ALLOC_MMU_PAGES
)
5061 mutex_lock(&kvm
->slots_lock
);
5063 kvm_mmu_change_mmu_pages(kvm
, kvm_nr_mmu_pages
);
5064 kvm
->arch
.n_requested_mmu_pages
= kvm_nr_mmu_pages
;
5066 mutex_unlock(&kvm
->slots_lock
);
5070 static unsigned long kvm_vm_ioctl_get_nr_mmu_pages(struct kvm
*kvm
)
5072 return kvm
->arch
.n_max_mmu_pages
;
5075 static int kvm_vm_ioctl_get_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
5077 struct kvm_pic
*pic
= kvm
->arch
.vpic
;
5081 switch (chip
->chip_id
) {
5082 case KVM_IRQCHIP_PIC_MASTER
:
5083 memcpy(&chip
->chip
.pic
, &pic
->pics
[0],
5084 sizeof(struct kvm_pic_state
));
5086 case KVM_IRQCHIP_PIC_SLAVE
:
5087 memcpy(&chip
->chip
.pic
, &pic
->pics
[1],
5088 sizeof(struct kvm_pic_state
));
5090 case KVM_IRQCHIP_IOAPIC
:
5091 kvm_get_ioapic(kvm
, &chip
->chip
.ioapic
);
5100 static int kvm_vm_ioctl_set_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
5102 struct kvm_pic
*pic
= kvm
->arch
.vpic
;
5106 switch (chip
->chip_id
) {
5107 case KVM_IRQCHIP_PIC_MASTER
:
5108 spin_lock(&pic
->lock
);
5109 memcpy(&pic
->pics
[0], &chip
->chip
.pic
,
5110 sizeof(struct kvm_pic_state
));
5111 spin_unlock(&pic
->lock
);
5113 case KVM_IRQCHIP_PIC_SLAVE
:
5114 spin_lock(&pic
->lock
);
5115 memcpy(&pic
->pics
[1], &chip
->chip
.pic
,
5116 sizeof(struct kvm_pic_state
));
5117 spin_unlock(&pic
->lock
);
5119 case KVM_IRQCHIP_IOAPIC
:
5120 kvm_set_ioapic(kvm
, &chip
->chip
.ioapic
);
5126 kvm_pic_update_irq(pic
);
5130 static int kvm_vm_ioctl_get_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
5132 struct kvm_kpit_state
*kps
= &kvm
->arch
.vpit
->pit_state
;
5134 BUILD_BUG_ON(sizeof(*ps
) != sizeof(kps
->channels
));
5136 mutex_lock(&kps
->lock
);
5137 memcpy(ps
, &kps
->channels
, sizeof(*ps
));
5138 mutex_unlock(&kps
->lock
);
5142 static int kvm_vm_ioctl_set_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
5145 struct kvm_pit
*pit
= kvm
->arch
.vpit
;
5147 mutex_lock(&pit
->pit_state
.lock
);
5148 memcpy(&pit
->pit_state
.channels
, ps
, sizeof(*ps
));
5149 for (i
= 0; i
< 3; i
++)
5150 kvm_pit_load_count(pit
, i
, ps
->channels
[i
].count
, 0);
5151 mutex_unlock(&pit
->pit_state
.lock
);
5155 static int kvm_vm_ioctl_get_pit2(struct kvm
*kvm
, struct kvm_pit_state2
*ps
)
5157 mutex_lock(&kvm
->arch
.vpit
->pit_state
.lock
);
5158 memcpy(ps
->channels
, &kvm
->arch
.vpit
->pit_state
.channels
,
5159 sizeof(ps
->channels
));
5160 ps
->flags
= kvm
->arch
.vpit
->pit_state
.flags
;
5161 mutex_unlock(&kvm
->arch
.vpit
->pit_state
.lock
);
5162 memset(&ps
->reserved
, 0, sizeof(ps
->reserved
));
5166 static int kvm_vm_ioctl_set_pit2(struct kvm
*kvm
, struct kvm_pit_state2
*ps
)
5170 u32 prev_legacy
, cur_legacy
;
5171 struct kvm_pit
*pit
= kvm
->arch
.vpit
;
5173 mutex_lock(&pit
->pit_state
.lock
);
5174 prev_legacy
= pit
->pit_state
.flags
& KVM_PIT_FLAGS_HPET_LEGACY
;
5175 cur_legacy
= ps
->flags
& KVM_PIT_FLAGS_HPET_LEGACY
;
5176 if (!prev_legacy
&& cur_legacy
)
5178 memcpy(&pit
->pit_state
.channels
, &ps
->channels
,
5179 sizeof(pit
->pit_state
.channels
));
5180 pit
->pit_state
.flags
= ps
->flags
;
5181 for (i
= 0; i
< 3; i
++)
5182 kvm_pit_load_count(pit
, i
, pit
->pit_state
.channels
[i
].count
,
5184 mutex_unlock(&pit
->pit_state
.lock
);
5188 static int kvm_vm_ioctl_reinject(struct kvm
*kvm
,
5189 struct kvm_reinject_control
*control
)
5191 struct kvm_pit
*pit
= kvm
->arch
.vpit
;
5193 /* pit->pit_state.lock was overloaded to prevent userspace from getting
5194 * an inconsistent state after running multiple KVM_REINJECT_CONTROL
5195 * ioctls in parallel. Use a separate lock if that ioctl isn't rare.
5197 mutex_lock(&pit
->pit_state
.lock
);
5198 kvm_pit_set_reinject(pit
, control
->pit_reinject
);
5199 mutex_unlock(&pit
->pit_state
.lock
);
5204 void kvm_arch_sync_dirty_log(struct kvm
*kvm
, struct kvm_memory_slot
*memslot
)
5207 * Flush potentially hardware-cached dirty pages to dirty_bitmap.
5209 if (kvm_x86_ops
.flush_log_dirty
)
5210 kvm_x86_ops
.flush_log_dirty(kvm
);
5213 int kvm_vm_ioctl_irq_line(struct kvm
*kvm
, struct kvm_irq_level
*irq_event
,
5216 if (!irqchip_in_kernel(kvm
))
5219 irq_event
->status
= kvm_set_irq(kvm
, KVM_USERSPACE_IRQ_SOURCE_ID
,
5220 irq_event
->irq
, irq_event
->level
,
5225 int kvm_vm_ioctl_enable_cap(struct kvm
*kvm
,
5226 struct kvm_enable_cap
*cap
)
5234 case KVM_CAP_DISABLE_QUIRKS
:
5235 kvm
->arch
.disabled_quirks
= cap
->args
[0];
5238 case KVM_CAP_SPLIT_IRQCHIP
: {
5239 mutex_lock(&kvm
->lock
);
5241 if (cap
->args
[0] > MAX_NR_RESERVED_IOAPIC_PINS
)
5242 goto split_irqchip_unlock
;
5244 if (irqchip_in_kernel(kvm
))
5245 goto split_irqchip_unlock
;
5246 if (kvm
->created_vcpus
)
5247 goto split_irqchip_unlock
;
5248 r
= kvm_setup_empty_irq_routing(kvm
);
5250 goto split_irqchip_unlock
;
5251 /* Pairs with irqchip_in_kernel. */
5253 kvm
->arch
.irqchip_mode
= KVM_IRQCHIP_SPLIT
;
5254 kvm
->arch
.nr_reserved_ioapic_pins
= cap
->args
[0];
5256 split_irqchip_unlock
:
5257 mutex_unlock(&kvm
->lock
);
5260 case KVM_CAP_X2APIC_API
:
5262 if (cap
->args
[0] & ~KVM_X2APIC_API_VALID_FLAGS
)
5265 if (cap
->args
[0] & KVM_X2APIC_API_USE_32BIT_IDS
)
5266 kvm
->arch
.x2apic_format
= true;
5267 if (cap
->args
[0] & KVM_X2APIC_API_DISABLE_BROADCAST_QUIRK
)
5268 kvm
->arch
.x2apic_broadcast_quirk_disabled
= true;
5272 case KVM_CAP_X86_DISABLE_EXITS
:
5274 if (cap
->args
[0] & ~KVM_X86_DISABLE_VALID_EXITS
)
5277 if ((cap
->args
[0] & KVM_X86_DISABLE_EXITS_MWAIT
) &&
5278 kvm_can_mwait_in_guest())
5279 kvm
->arch
.mwait_in_guest
= true;
5280 if (cap
->args
[0] & KVM_X86_DISABLE_EXITS_HLT
)
5281 kvm
->arch
.hlt_in_guest
= true;
5282 if (cap
->args
[0] & KVM_X86_DISABLE_EXITS_PAUSE
)
5283 kvm
->arch
.pause_in_guest
= true;
5284 if (cap
->args
[0] & KVM_X86_DISABLE_EXITS_CSTATE
)
5285 kvm
->arch
.cstate_in_guest
= true;
5288 case KVM_CAP_MSR_PLATFORM_INFO
:
5289 kvm
->arch
.guest_can_read_msr_platform_info
= cap
->args
[0];
5292 case KVM_CAP_EXCEPTION_PAYLOAD
:
5293 kvm
->arch
.exception_payload_enabled
= cap
->args
[0];
5296 case KVM_CAP_X86_USER_SPACE_MSR
:
5297 kvm
->arch
.user_space_msr_mask
= cap
->args
[0];
5307 static void kvm_clear_msr_filter(struct kvm
*kvm
)
5310 u32 count
= kvm
->arch
.msr_filter
.count
;
5311 struct msr_bitmap_range ranges
[16];
5313 mutex_lock(&kvm
->lock
);
5314 kvm
->arch
.msr_filter
.count
= 0;
5315 memcpy(ranges
, kvm
->arch
.msr_filter
.ranges
, count
* sizeof(ranges
[0]));
5316 mutex_unlock(&kvm
->lock
);
5317 synchronize_srcu(&kvm
->srcu
);
5319 for (i
= 0; i
< count
; i
++)
5320 kfree(ranges
[i
].bitmap
);
5323 static int kvm_add_msr_filter(struct kvm
*kvm
, struct kvm_msr_filter_range
*user_range
)
5325 struct msr_bitmap_range
*ranges
= kvm
->arch
.msr_filter
.ranges
;
5326 struct msr_bitmap_range range
;
5327 unsigned long *bitmap
= NULL
;
5331 if (!user_range
->nmsrs
)
5334 bitmap_size
= BITS_TO_LONGS(user_range
->nmsrs
) * sizeof(long);
5335 if (!bitmap_size
|| bitmap_size
> KVM_MSR_FILTER_MAX_BITMAP_SIZE
)
5338 bitmap
= memdup_user((__user u8
*)user_range
->bitmap
, bitmap_size
);
5340 return PTR_ERR(bitmap
);
5342 range
= (struct msr_bitmap_range
) {
5343 .flags
= user_range
->flags
,
5344 .base
= user_range
->base
,
5345 .nmsrs
= user_range
->nmsrs
,
5349 if (range
.flags
& ~(KVM_MSR_FILTER_READ
| KVM_MSR_FILTER_WRITE
)) {
5359 /* Everything ok, add this range identifier to our global pool */
5360 ranges
[kvm
->arch
.msr_filter
.count
] = range
;
5361 /* Make sure we filled the array before we tell anyone to walk it */
5363 kvm
->arch
.msr_filter
.count
++;
5371 static int kvm_vm_ioctl_set_msr_filter(struct kvm
*kvm
, void __user
*argp
)
5373 struct kvm_msr_filter __user
*user_msr_filter
= argp
;
5374 struct kvm_msr_filter filter
;
5380 if (copy_from_user(&filter
, user_msr_filter
, sizeof(filter
)))
5383 for (i
= 0; i
< ARRAY_SIZE(filter
.ranges
); i
++)
5384 empty
&= !filter
.ranges
[i
].nmsrs
;
5386 default_allow
= !(filter
.flags
& KVM_MSR_FILTER_DEFAULT_DENY
);
5387 if (empty
&& !default_allow
)
5390 kvm_clear_msr_filter(kvm
);
5392 kvm
->arch
.msr_filter
.default_allow
= default_allow
;
5395 * Protect from concurrent calls to this function that could trigger
5396 * a TOCTOU violation on kvm->arch.msr_filter.count.
5398 mutex_lock(&kvm
->lock
);
5399 for (i
= 0; i
< ARRAY_SIZE(filter
.ranges
); i
++) {
5400 r
= kvm_add_msr_filter(kvm
, &filter
.ranges
[i
]);
5405 kvm_make_all_cpus_request(kvm
, KVM_REQ_MSR_FILTER_CHANGED
);
5406 mutex_unlock(&kvm
->lock
);
5411 long kvm_arch_vm_ioctl(struct file
*filp
,
5412 unsigned int ioctl
, unsigned long arg
)
5414 struct kvm
*kvm
= filp
->private_data
;
5415 void __user
*argp
= (void __user
*)arg
;
5418 * This union makes it completely explicit to gcc-3.x
5419 * that these two variables' stack usage should be
5420 * combined, not added together.
5423 struct kvm_pit_state ps
;
5424 struct kvm_pit_state2 ps2
;
5425 struct kvm_pit_config pit_config
;
5429 case KVM_SET_TSS_ADDR
:
5430 r
= kvm_vm_ioctl_set_tss_addr(kvm
, arg
);
5432 case KVM_SET_IDENTITY_MAP_ADDR
: {
5435 mutex_lock(&kvm
->lock
);
5437 if (kvm
->created_vcpus
)
5438 goto set_identity_unlock
;
5440 if (copy_from_user(&ident_addr
, argp
, sizeof(ident_addr
)))
5441 goto set_identity_unlock
;
5442 r
= kvm_vm_ioctl_set_identity_map_addr(kvm
, ident_addr
);
5443 set_identity_unlock
:
5444 mutex_unlock(&kvm
->lock
);
5447 case KVM_SET_NR_MMU_PAGES
:
5448 r
= kvm_vm_ioctl_set_nr_mmu_pages(kvm
, arg
);
5450 case KVM_GET_NR_MMU_PAGES
:
5451 r
= kvm_vm_ioctl_get_nr_mmu_pages(kvm
);
5453 case KVM_CREATE_IRQCHIP
: {
5454 mutex_lock(&kvm
->lock
);
5457 if (irqchip_in_kernel(kvm
))
5458 goto create_irqchip_unlock
;
5461 if (kvm
->created_vcpus
)
5462 goto create_irqchip_unlock
;
5464 r
= kvm_pic_init(kvm
);
5466 goto create_irqchip_unlock
;
5468 r
= kvm_ioapic_init(kvm
);
5470 kvm_pic_destroy(kvm
);
5471 goto create_irqchip_unlock
;
5474 r
= kvm_setup_default_irq_routing(kvm
);
5476 kvm_ioapic_destroy(kvm
);
5477 kvm_pic_destroy(kvm
);
5478 goto create_irqchip_unlock
;
5480 /* Write kvm->irq_routing before enabling irqchip_in_kernel. */
5482 kvm
->arch
.irqchip_mode
= KVM_IRQCHIP_KERNEL
;
5483 create_irqchip_unlock
:
5484 mutex_unlock(&kvm
->lock
);
5487 case KVM_CREATE_PIT
:
5488 u
.pit_config
.flags
= KVM_PIT_SPEAKER_DUMMY
;
5490 case KVM_CREATE_PIT2
:
5492 if (copy_from_user(&u
.pit_config
, argp
,
5493 sizeof(struct kvm_pit_config
)))
5496 mutex_lock(&kvm
->lock
);
5499 goto create_pit_unlock
;
5501 kvm
->arch
.vpit
= kvm_create_pit(kvm
, u
.pit_config
.flags
);
5505 mutex_unlock(&kvm
->lock
);
5507 case KVM_GET_IRQCHIP
: {
5508 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
5509 struct kvm_irqchip
*chip
;
5511 chip
= memdup_user(argp
, sizeof(*chip
));
5518 if (!irqchip_kernel(kvm
))
5519 goto get_irqchip_out
;
5520 r
= kvm_vm_ioctl_get_irqchip(kvm
, chip
);
5522 goto get_irqchip_out
;
5524 if (copy_to_user(argp
, chip
, sizeof(*chip
)))
5525 goto get_irqchip_out
;
5531 case KVM_SET_IRQCHIP
: {
5532 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
5533 struct kvm_irqchip
*chip
;
5535 chip
= memdup_user(argp
, sizeof(*chip
));
5542 if (!irqchip_kernel(kvm
))
5543 goto set_irqchip_out
;
5544 r
= kvm_vm_ioctl_set_irqchip(kvm
, chip
);
5551 if (copy_from_user(&u
.ps
, argp
, sizeof(struct kvm_pit_state
)))
5554 if (!kvm
->arch
.vpit
)
5556 r
= kvm_vm_ioctl_get_pit(kvm
, &u
.ps
);
5560 if (copy_to_user(argp
, &u
.ps
, sizeof(struct kvm_pit_state
)))
5567 if (copy_from_user(&u
.ps
, argp
, sizeof(u
.ps
)))
5569 mutex_lock(&kvm
->lock
);
5571 if (!kvm
->arch
.vpit
)
5573 r
= kvm_vm_ioctl_set_pit(kvm
, &u
.ps
);
5575 mutex_unlock(&kvm
->lock
);
5578 case KVM_GET_PIT2
: {
5580 if (!kvm
->arch
.vpit
)
5582 r
= kvm_vm_ioctl_get_pit2(kvm
, &u
.ps2
);
5586 if (copy_to_user(argp
, &u
.ps2
, sizeof(u
.ps2
)))
5591 case KVM_SET_PIT2
: {
5593 if (copy_from_user(&u
.ps2
, argp
, sizeof(u
.ps2
)))
5595 mutex_lock(&kvm
->lock
);
5597 if (!kvm
->arch
.vpit
)
5599 r
= kvm_vm_ioctl_set_pit2(kvm
, &u
.ps2
);
5601 mutex_unlock(&kvm
->lock
);
5604 case KVM_REINJECT_CONTROL
: {
5605 struct kvm_reinject_control control
;
5607 if (copy_from_user(&control
, argp
, sizeof(control
)))
5610 if (!kvm
->arch
.vpit
)
5612 r
= kvm_vm_ioctl_reinject(kvm
, &control
);
5615 case KVM_SET_BOOT_CPU_ID
:
5617 mutex_lock(&kvm
->lock
);
5618 if (kvm
->created_vcpus
)
5621 kvm
->arch
.bsp_vcpu_id
= arg
;
5622 mutex_unlock(&kvm
->lock
);
5624 case KVM_XEN_HVM_CONFIG
: {
5625 struct kvm_xen_hvm_config xhc
;
5627 if (copy_from_user(&xhc
, argp
, sizeof(xhc
)))
5632 memcpy(&kvm
->arch
.xen_hvm_config
, &xhc
, sizeof(xhc
));
5636 case KVM_SET_CLOCK
: {
5637 struct kvm_clock_data user_ns
;
5641 if (copy_from_user(&user_ns
, argp
, sizeof(user_ns
)))
5650 * TODO: userspace has to take care of races with VCPU_RUN, so
5651 * kvm_gen_update_masterclock() can be cut down to locked
5652 * pvclock_update_vm_gtod_copy().
5654 kvm_gen_update_masterclock(kvm
);
5655 now_ns
= get_kvmclock_ns(kvm
);
5656 kvm
->arch
.kvmclock_offset
+= user_ns
.clock
- now_ns
;
5657 kvm_make_all_cpus_request(kvm
, KVM_REQ_CLOCK_UPDATE
);
5660 case KVM_GET_CLOCK
: {
5661 struct kvm_clock_data user_ns
;
5664 now_ns
= get_kvmclock_ns(kvm
);
5665 user_ns
.clock
= now_ns
;
5666 user_ns
.flags
= kvm
->arch
.use_master_clock
? KVM_CLOCK_TSC_STABLE
: 0;
5667 memset(&user_ns
.pad
, 0, sizeof(user_ns
.pad
));
5670 if (copy_to_user(argp
, &user_ns
, sizeof(user_ns
)))
5675 case KVM_MEMORY_ENCRYPT_OP
: {
5677 if (kvm_x86_ops
.mem_enc_op
)
5678 r
= kvm_x86_ops
.mem_enc_op(kvm
, argp
);
5681 case KVM_MEMORY_ENCRYPT_REG_REGION
: {
5682 struct kvm_enc_region region
;
5685 if (copy_from_user(®ion
, argp
, sizeof(region
)))
5689 if (kvm_x86_ops
.mem_enc_reg_region
)
5690 r
= kvm_x86_ops
.mem_enc_reg_region(kvm
, ®ion
);
5693 case KVM_MEMORY_ENCRYPT_UNREG_REGION
: {
5694 struct kvm_enc_region region
;
5697 if (copy_from_user(®ion
, argp
, sizeof(region
)))
5701 if (kvm_x86_ops
.mem_enc_unreg_region
)
5702 r
= kvm_x86_ops
.mem_enc_unreg_region(kvm
, ®ion
);
5705 case KVM_HYPERV_EVENTFD
: {
5706 struct kvm_hyperv_eventfd hvevfd
;
5709 if (copy_from_user(&hvevfd
, argp
, sizeof(hvevfd
)))
5711 r
= kvm_vm_ioctl_hv_eventfd(kvm
, &hvevfd
);
5714 case KVM_SET_PMU_EVENT_FILTER
:
5715 r
= kvm_vm_ioctl_set_pmu_event_filter(kvm
, argp
);
5717 case KVM_X86_SET_MSR_FILTER
:
5718 r
= kvm_vm_ioctl_set_msr_filter(kvm
, argp
);
5727 static void kvm_init_msr_list(void)
5729 struct x86_pmu_capability x86_pmu
;
5733 BUILD_BUG_ON_MSG(INTEL_PMC_MAX_FIXED
!= 4,
5734 "Please update the fixed PMCs in msrs_to_saved_all[]");
5736 perf_get_x86_pmu_capability(&x86_pmu
);
5738 num_msrs_to_save
= 0;
5739 num_emulated_msrs
= 0;
5740 num_msr_based_features
= 0;
5742 for (i
= 0; i
< ARRAY_SIZE(msrs_to_save_all
); i
++) {
5743 if (rdmsr_safe(msrs_to_save_all
[i
], &dummy
[0], &dummy
[1]) < 0)
5747 * Even MSRs that are valid in the host may not be exposed
5748 * to the guests in some cases.
5750 switch (msrs_to_save_all
[i
]) {
5751 case MSR_IA32_BNDCFGS
:
5752 if (!kvm_mpx_supported())
5756 if (!kvm_cpu_cap_has(X86_FEATURE_RDTSCP
))
5759 case MSR_IA32_UMWAIT_CONTROL
:
5760 if (!kvm_cpu_cap_has(X86_FEATURE_WAITPKG
))
5763 case MSR_IA32_RTIT_CTL
:
5764 case MSR_IA32_RTIT_STATUS
:
5765 if (!kvm_cpu_cap_has(X86_FEATURE_INTEL_PT
))
5768 case MSR_IA32_RTIT_CR3_MATCH
:
5769 if (!kvm_cpu_cap_has(X86_FEATURE_INTEL_PT
) ||
5770 !intel_pt_validate_hw_cap(PT_CAP_cr3_filtering
))
5773 case MSR_IA32_RTIT_OUTPUT_BASE
:
5774 case MSR_IA32_RTIT_OUTPUT_MASK
:
5775 if (!kvm_cpu_cap_has(X86_FEATURE_INTEL_PT
) ||
5776 (!intel_pt_validate_hw_cap(PT_CAP_topa_output
) &&
5777 !intel_pt_validate_hw_cap(PT_CAP_single_range_output
)))
5780 case MSR_IA32_RTIT_ADDR0_A
... MSR_IA32_RTIT_ADDR3_B
:
5781 if (!kvm_cpu_cap_has(X86_FEATURE_INTEL_PT
) ||
5782 msrs_to_save_all
[i
] - MSR_IA32_RTIT_ADDR0_A
>=
5783 intel_pt_validate_hw_cap(PT_CAP_num_address_ranges
) * 2)
5786 case MSR_ARCH_PERFMON_PERFCTR0
... MSR_ARCH_PERFMON_PERFCTR0
+ 17:
5787 if (msrs_to_save_all
[i
] - MSR_ARCH_PERFMON_PERFCTR0
>=
5788 min(INTEL_PMC_MAX_GENERIC
, x86_pmu
.num_counters_gp
))
5791 case MSR_ARCH_PERFMON_EVENTSEL0
... MSR_ARCH_PERFMON_EVENTSEL0
+ 17:
5792 if (msrs_to_save_all
[i
] - MSR_ARCH_PERFMON_EVENTSEL0
>=
5793 min(INTEL_PMC_MAX_GENERIC
, x86_pmu
.num_counters_gp
))
5800 msrs_to_save
[num_msrs_to_save
++] = msrs_to_save_all
[i
];
5803 for (i
= 0; i
< ARRAY_SIZE(emulated_msrs_all
); i
++) {
5804 if (!kvm_x86_ops
.has_emulated_msr(NULL
, emulated_msrs_all
[i
]))
5807 emulated_msrs
[num_emulated_msrs
++] = emulated_msrs_all
[i
];
5810 for (i
= 0; i
< ARRAY_SIZE(msr_based_features_all
); i
++) {
5811 struct kvm_msr_entry msr
;
5813 msr
.index
= msr_based_features_all
[i
];
5814 if (kvm_get_msr_feature(&msr
))
5817 msr_based_features
[num_msr_based_features
++] = msr_based_features_all
[i
];
5821 static int vcpu_mmio_write(struct kvm_vcpu
*vcpu
, gpa_t addr
, int len
,
5829 if (!(lapic_in_kernel(vcpu
) &&
5830 !kvm_iodevice_write(vcpu
, &vcpu
->arch
.apic
->dev
, addr
, n
, v
))
5831 && kvm_io_bus_write(vcpu
, KVM_MMIO_BUS
, addr
, n
, v
))
5842 static int vcpu_mmio_read(struct kvm_vcpu
*vcpu
, gpa_t addr
, int len
, void *v
)
5849 if (!(lapic_in_kernel(vcpu
) &&
5850 !kvm_iodevice_read(vcpu
, &vcpu
->arch
.apic
->dev
,
5852 && kvm_io_bus_read(vcpu
, KVM_MMIO_BUS
, addr
, n
, v
))
5854 trace_kvm_mmio(KVM_TRACE_MMIO_READ
, n
, addr
, v
);
5864 static void kvm_set_segment(struct kvm_vcpu
*vcpu
,
5865 struct kvm_segment
*var
, int seg
)
5867 kvm_x86_ops
.set_segment(vcpu
, var
, seg
);
5870 void kvm_get_segment(struct kvm_vcpu
*vcpu
,
5871 struct kvm_segment
*var
, int seg
)
5873 kvm_x86_ops
.get_segment(vcpu
, var
, seg
);
5876 gpa_t
translate_nested_gpa(struct kvm_vcpu
*vcpu
, gpa_t gpa
, u32 access
,
5877 struct x86_exception
*exception
)
5881 BUG_ON(!mmu_is_nested(vcpu
));
5883 /* NPT walks are always user-walks */
5884 access
|= PFERR_USER_MASK
;
5885 t_gpa
= vcpu
->arch
.mmu
->gva_to_gpa(vcpu
, gpa
, access
, exception
);
5890 gpa_t
kvm_mmu_gva_to_gpa_read(struct kvm_vcpu
*vcpu
, gva_t gva
,
5891 struct x86_exception
*exception
)
5893 u32 access
= (kvm_x86_ops
.get_cpl(vcpu
) == 3) ? PFERR_USER_MASK
: 0;
5894 return vcpu
->arch
.walk_mmu
->gva_to_gpa(vcpu
, gva
, access
, exception
);
5897 gpa_t
kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu
*vcpu
, gva_t gva
,
5898 struct x86_exception
*exception
)
5900 u32 access
= (kvm_x86_ops
.get_cpl(vcpu
) == 3) ? PFERR_USER_MASK
: 0;
5901 access
|= PFERR_FETCH_MASK
;
5902 return vcpu
->arch
.walk_mmu
->gva_to_gpa(vcpu
, gva
, access
, exception
);
5905 gpa_t
kvm_mmu_gva_to_gpa_write(struct kvm_vcpu
*vcpu
, gva_t gva
,
5906 struct x86_exception
*exception
)
5908 u32 access
= (kvm_x86_ops
.get_cpl(vcpu
) == 3) ? PFERR_USER_MASK
: 0;
5909 access
|= PFERR_WRITE_MASK
;
5910 return vcpu
->arch
.walk_mmu
->gva_to_gpa(vcpu
, gva
, access
, exception
);
5913 /* uses this to access any guest's mapped memory without checking CPL */
5914 gpa_t
kvm_mmu_gva_to_gpa_system(struct kvm_vcpu
*vcpu
, gva_t gva
,
5915 struct x86_exception
*exception
)
5917 return vcpu
->arch
.walk_mmu
->gva_to_gpa(vcpu
, gva
, 0, exception
);
5920 static int kvm_read_guest_virt_helper(gva_t addr
, void *val
, unsigned int bytes
,
5921 struct kvm_vcpu
*vcpu
, u32 access
,
5922 struct x86_exception
*exception
)
5925 int r
= X86EMUL_CONTINUE
;
5928 gpa_t gpa
= vcpu
->arch
.walk_mmu
->gva_to_gpa(vcpu
, addr
, access
,
5930 unsigned offset
= addr
& (PAGE_SIZE
-1);
5931 unsigned toread
= min(bytes
, (unsigned)PAGE_SIZE
- offset
);
5934 if (gpa
== UNMAPPED_GVA
)
5935 return X86EMUL_PROPAGATE_FAULT
;
5936 ret
= kvm_vcpu_read_guest_page(vcpu
, gpa
>> PAGE_SHIFT
, data
,
5939 r
= X86EMUL_IO_NEEDED
;
5951 /* used for instruction fetching */
5952 static int kvm_fetch_guest_virt(struct x86_emulate_ctxt
*ctxt
,
5953 gva_t addr
, void *val
, unsigned int bytes
,
5954 struct x86_exception
*exception
)
5956 struct kvm_vcpu
*vcpu
= emul_to_vcpu(ctxt
);
5957 u32 access
= (kvm_x86_ops
.get_cpl(vcpu
) == 3) ? PFERR_USER_MASK
: 0;
5961 /* Inline kvm_read_guest_virt_helper for speed. */
5962 gpa_t gpa
= vcpu
->arch
.walk_mmu
->gva_to_gpa(vcpu
, addr
, access
|PFERR_FETCH_MASK
,
5964 if (unlikely(gpa
== UNMAPPED_GVA
))
5965 return X86EMUL_PROPAGATE_FAULT
;
5967 offset
= addr
& (PAGE_SIZE
-1);
5968 if (WARN_ON(offset
+ bytes
> PAGE_SIZE
))
5969 bytes
= (unsigned)PAGE_SIZE
- offset
;
5970 ret
= kvm_vcpu_read_guest_page(vcpu
, gpa
>> PAGE_SHIFT
, val
,
5972 if (unlikely(ret
< 0))
5973 return X86EMUL_IO_NEEDED
;
5975 return X86EMUL_CONTINUE
;
5978 int kvm_read_guest_virt(struct kvm_vcpu
*vcpu
,
5979 gva_t addr
, void *val
, unsigned int bytes
,
5980 struct x86_exception
*exception
)
5982 u32 access
= (kvm_x86_ops
.get_cpl(vcpu
) == 3) ? PFERR_USER_MASK
: 0;
5985 * FIXME: this should call handle_emulation_failure if X86EMUL_IO_NEEDED
5986 * is returned, but our callers are not ready for that and they blindly
5987 * call kvm_inject_page_fault. Ensure that they at least do not leak
5988 * uninitialized kernel stack memory into cr2 and error code.
5990 memset(exception
, 0, sizeof(*exception
));
5991 return kvm_read_guest_virt_helper(addr
, val
, bytes
, vcpu
, access
,
5994 EXPORT_SYMBOL_GPL(kvm_read_guest_virt
);
5996 static int emulator_read_std(struct x86_emulate_ctxt
*ctxt
,
5997 gva_t addr
, void *val
, unsigned int bytes
,
5998 struct x86_exception
*exception
, bool system
)
6000 struct kvm_vcpu
*vcpu
= emul_to_vcpu(ctxt
);
6003 if (!system
&& kvm_x86_ops
.get_cpl(vcpu
) == 3)
6004 access
|= PFERR_USER_MASK
;
6006 return kvm_read_guest_virt_helper(addr
, val
, bytes
, vcpu
, access
, exception
);
6009 static int kvm_read_guest_phys_system(struct x86_emulate_ctxt
*ctxt
,
6010 unsigned long addr
, void *val
, unsigned int bytes
)
6012 struct kvm_vcpu
*vcpu
= emul_to_vcpu(ctxt
);
6013 int r
= kvm_vcpu_read_guest(vcpu
, addr
, val
, bytes
);
6015 return r
< 0 ? X86EMUL_IO_NEEDED
: X86EMUL_CONTINUE
;
6018 static int kvm_write_guest_virt_helper(gva_t addr
, void *val
, unsigned int bytes
,
6019 struct kvm_vcpu
*vcpu
, u32 access
,
6020 struct x86_exception
*exception
)
6023 int r
= X86EMUL_CONTINUE
;
6026 gpa_t gpa
= vcpu
->arch
.walk_mmu
->gva_to_gpa(vcpu
, addr
,
6029 unsigned offset
= addr
& (PAGE_SIZE
-1);
6030 unsigned towrite
= min(bytes
, (unsigned)PAGE_SIZE
- offset
);
6033 if (gpa
== UNMAPPED_GVA
)
6034 return X86EMUL_PROPAGATE_FAULT
;
6035 ret
= kvm_vcpu_write_guest(vcpu
, gpa
, data
, towrite
);
6037 r
= X86EMUL_IO_NEEDED
;
6049 static int emulator_write_std(struct x86_emulate_ctxt
*ctxt
, gva_t addr
, void *val
,
6050 unsigned int bytes
, struct x86_exception
*exception
,
6053 struct kvm_vcpu
*vcpu
= emul_to_vcpu(ctxt
);
6054 u32 access
= PFERR_WRITE_MASK
;
6056 if (!system
&& kvm_x86_ops
.get_cpl(vcpu
) == 3)
6057 access
|= PFERR_USER_MASK
;
6059 return kvm_write_guest_virt_helper(addr
, val
, bytes
, vcpu
,
6063 int kvm_write_guest_virt_system(struct kvm_vcpu
*vcpu
, gva_t addr
, void *val
,
6064 unsigned int bytes
, struct x86_exception
*exception
)
6066 /* kvm_write_guest_virt_system can pull in tons of pages. */
6067 vcpu
->arch
.l1tf_flush_l1d
= true;
6069 return kvm_write_guest_virt_helper(addr
, val
, bytes
, vcpu
,
6070 PFERR_WRITE_MASK
, exception
);
6072 EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system
);
6074 int handle_ud(struct kvm_vcpu
*vcpu
)
6076 static const char kvm_emulate_prefix
[] = { __KVM_EMULATE_PREFIX
};
6077 int emul_type
= EMULTYPE_TRAP_UD
;
6078 char sig
[5]; /* ud2; .ascii "kvm" */
6079 struct x86_exception e
;
6081 if (unlikely(!kvm_x86_ops
.can_emulate_instruction(vcpu
, NULL
, 0)))
6084 if (force_emulation_prefix
&&
6085 kvm_read_guest_virt(vcpu
, kvm_get_linear_rip(vcpu
),
6086 sig
, sizeof(sig
), &e
) == 0 &&
6087 memcmp(sig
, kvm_emulate_prefix
, sizeof(sig
)) == 0) {
6088 kvm_rip_write(vcpu
, kvm_rip_read(vcpu
) + sizeof(sig
));
6089 emul_type
= EMULTYPE_TRAP_UD_FORCED
;
6092 return kvm_emulate_instruction(vcpu
, emul_type
);
6094 EXPORT_SYMBOL_GPL(handle_ud
);
6096 static int vcpu_is_mmio_gpa(struct kvm_vcpu
*vcpu
, unsigned long gva
,
6097 gpa_t gpa
, bool write
)
6099 /* For APIC access vmexit */
6100 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
6103 if (vcpu_match_mmio_gpa(vcpu
, gpa
)) {
6104 trace_vcpu_match_mmio(gva
, gpa
, write
, true);
6111 static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu
*vcpu
, unsigned long gva
,
6112 gpa_t
*gpa
, struct x86_exception
*exception
,
6115 u32 access
= ((kvm_x86_ops
.get_cpl(vcpu
) == 3) ? PFERR_USER_MASK
: 0)
6116 | (write
? PFERR_WRITE_MASK
: 0);
6119 * currently PKRU is only applied to ept enabled guest so
6120 * there is no pkey in EPT page table for L1 guest or EPT
6121 * shadow page table for L2 guest.
6123 if (vcpu_match_mmio_gva(vcpu
, gva
)
6124 && !permission_fault(vcpu
, vcpu
->arch
.walk_mmu
,
6125 vcpu
->arch
.mmio_access
, 0, access
)) {
6126 *gpa
= vcpu
->arch
.mmio_gfn
<< PAGE_SHIFT
|
6127 (gva
& (PAGE_SIZE
- 1));
6128 trace_vcpu_match_mmio(gva
, *gpa
, write
, false);
6132 *gpa
= vcpu
->arch
.walk_mmu
->gva_to_gpa(vcpu
, gva
, access
, exception
);
6134 if (*gpa
== UNMAPPED_GVA
)
6137 return vcpu_is_mmio_gpa(vcpu
, gva
, *gpa
, write
);
6140 int emulator_write_phys(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
6141 const void *val
, int bytes
)
6145 ret
= kvm_vcpu_write_guest(vcpu
, gpa
, val
, bytes
);
6148 kvm_page_track_write(vcpu
, gpa
, val
, bytes
);
6152 struct read_write_emulator_ops
{
6153 int (*read_write_prepare
)(struct kvm_vcpu
*vcpu
, void *val
,
6155 int (*read_write_emulate
)(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
6156 void *val
, int bytes
);
6157 int (*read_write_mmio
)(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
6158 int bytes
, void *val
);
6159 int (*read_write_exit_mmio
)(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
6160 void *val
, int bytes
);
6164 static int read_prepare(struct kvm_vcpu
*vcpu
, void *val
, int bytes
)
6166 if (vcpu
->mmio_read_completed
) {
6167 trace_kvm_mmio(KVM_TRACE_MMIO_READ
, bytes
,
6168 vcpu
->mmio_fragments
[0].gpa
, val
);
6169 vcpu
->mmio_read_completed
= 0;
6176 static int read_emulate(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
6177 void *val
, int bytes
)
6179 return !kvm_vcpu_read_guest(vcpu
, gpa
, val
, bytes
);
6182 static int write_emulate(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
6183 void *val
, int bytes
)
6185 return emulator_write_phys(vcpu
, gpa
, val
, bytes
);
6188 static int write_mmio(struct kvm_vcpu
*vcpu
, gpa_t gpa
, int bytes
, void *val
)
6190 trace_kvm_mmio(KVM_TRACE_MMIO_WRITE
, bytes
, gpa
, val
);
6191 return vcpu_mmio_write(vcpu
, gpa
, bytes
, val
);
6194 static int read_exit_mmio(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
6195 void *val
, int bytes
)
6197 trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED
, bytes
, gpa
, NULL
);
6198 return X86EMUL_IO_NEEDED
;
6201 static int write_exit_mmio(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
6202 void *val
, int bytes
)
6204 struct kvm_mmio_fragment
*frag
= &vcpu
->mmio_fragments
[0];
6206 memcpy(vcpu
->run
->mmio
.data
, frag
->data
, min(8u, frag
->len
));
6207 return X86EMUL_CONTINUE
;
6210 static const struct read_write_emulator_ops read_emultor
= {
6211 .read_write_prepare
= read_prepare
,
6212 .read_write_emulate
= read_emulate
,
6213 .read_write_mmio
= vcpu_mmio_read
,
6214 .read_write_exit_mmio
= read_exit_mmio
,
6217 static const struct read_write_emulator_ops write_emultor
= {
6218 .read_write_emulate
= write_emulate
,
6219 .read_write_mmio
= write_mmio
,
6220 .read_write_exit_mmio
= write_exit_mmio
,
6224 static int emulator_read_write_onepage(unsigned long addr
, void *val
,
6226 struct x86_exception
*exception
,
6227 struct kvm_vcpu
*vcpu
,
6228 const struct read_write_emulator_ops
*ops
)
6232 bool write
= ops
->write
;
6233 struct kvm_mmio_fragment
*frag
;
6234 struct x86_emulate_ctxt
*ctxt
= vcpu
->arch
.emulate_ctxt
;
6237 * If the exit was due to a NPF we may already have a GPA.
6238 * If the GPA is present, use it to avoid the GVA to GPA table walk.
6239 * Note, this cannot be used on string operations since string
6240 * operation using rep will only have the initial GPA from the NPF
6243 if (ctxt
->gpa_available
&& emulator_can_use_gpa(ctxt
) &&
6244 (addr
& ~PAGE_MASK
) == (ctxt
->gpa_val
& ~PAGE_MASK
)) {
6245 gpa
= ctxt
->gpa_val
;
6246 ret
= vcpu_is_mmio_gpa(vcpu
, addr
, gpa
, write
);
6248 ret
= vcpu_mmio_gva_to_gpa(vcpu
, addr
, &gpa
, exception
, write
);
6250 return X86EMUL_PROPAGATE_FAULT
;
6253 if (!ret
&& ops
->read_write_emulate(vcpu
, gpa
, val
, bytes
))
6254 return X86EMUL_CONTINUE
;
6257 * Is this MMIO handled locally?
6259 handled
= ops
->read_write_mmio(vcpu
, gpa
, bytes
, val
);
6260 if (handled
== bytes
)
6261 return X86EMUL_CONTINUE
;
6267 WARN_ON(vcpu
->mmio_nr_fragments
>= KVM_MAX_MMIO_FRAGMENTS
);
6268 frag
= &vcpu
->mmio_fragments
[vcpu
->mmio_nr_fragments
++];
6272 return X86EMUL_CONTINUE
;
6275 static int emulator_read_write(struct x86_emulate_ctxt
*ctxt
,
6277 void *val
, unsigned int bytes
,
6278 struct x86_exception
*exception
,
6279 const struct read_write_emulator_ops
*ops
)
6281 struct kvm_vcpu
*vcpu
= emul_to_vcpu(ctxt
);
6285 if (ops
->read_write_prepare
&&
6286 ops
->read_write_prepare(vcpu
, val
, bytes
))
6287 return X86EMUL_CONTINUE
;
6289 vcpu
->mmio_nr_fragments
= 0;
6291 /* Crossing a page boundary? */
6292 if (((addr
+ bytes
- 1) ^ addr
) & PAGE_MASK
) {
6295 now
= -addr
& ~PAGE_MASK
;
6296 rc
= emulator_read_write_onepage(addr
, val
, now
, exception
,
6299 if (rc
!= X86EMUL_CONTINUE
)
6302 if (ctxt
->mode
!= X86EMUL_MODE_PROT64
)
6308 rc
= emulator_read_write_onepage(addr
, val
, bytes
, exception
,
6310 if (rc
!= X86EMUL_CONTINUE
)
6313 if (!vcpu
->mmio_nr_fragments
)
6316 gpa
= vcpu
->mmio_fragments
[0].gpa
;
6318 vcpu
->mmio_needed
= 1;
6319 vcpu
->mmio_cur_fragment
= 0;
6321 vcpu
->run
->mmio
.len
= min(8u, vcpu
->mmio_fragments
[0].len
);
6322 vcpu
->run
->mmio
.is_write
= vcpu
->mmio_is_write
= ops
->write
;
6323 vcpu
->run
->exit_reason
= KVM_EXIT_MMIO
;
6324 vcpu
->run
->mmio
.phys_addr
= gpa
;
6326 return ops
->read_write_exit_mmio(vcpu
, gpa
, val
, bytes
);
6329 static int emulator_read_emulated(struct x86_emulate_ctxt
*ctxt
,
6333 struct x86_exception
*exception
)
6335 return emulator_read_write(ctxt
, addr
, val
, bytes
,
6336 exception
, &read_emultor
);
6339 static int emulator_write_emulated(struct x86_emulate_ctxt
*ctxt
,
6343 struct x86_exception
*exception
)
6345 return emulator_read_write(ctxt
, addr
, (void *)val
, bytes
,
6346 exception
, &write_emultor
);
6349 #define CMPXCHG_TYPE(t, ptr, old, new) \
6350 (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old))
6352 #ifdef CONFIG_X86_64
6353 # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new)
6355 # define CMPXCHG64(ptr, old, new) \
6356 (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old))
6359 static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt
*ctxt
,
6364 struct x86_exception
*exception
)
6366 struct kvm_host_map map
;
6367 struct kvm_vcpu
*vcpu
= emul_to_vcpu(ctxt
);
6373 /* guests cmpxchg8b have to be emulated atomically */
6374 if (bytes
> 8 || (bytes
& (bytes
- 1)))
6377 gpa
= kvm_mmu_gva_to_gpa_write(vcpu
, addr
, NULL
);
6379 if (gpa
== UNMAPPED_GVA
||
6380 (gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
6384 * Emulate the atomic as a straight write to avoid #AC if SLD is
6385 * enabled in the host and the access splits a cache line.
6387 if (boot_cpu_has(X86_FEATURE_SPLIT_LOCK_DETECT
))
6388 page_line_mask
= ~(cache_line_size() - 1);
6390 page_line_mask
= PAGE_MASK
;
6392 if (((gpa
+ bytes
- 1) & page_line_mask
) != (gpa
& page_line_mask
))
6395 if (kvm_vcpu_map(vcpu
, gpa_to_gfn(gpa
), &map
))
6398 kaddr
= map
.hva
+ offset_in_page(gpa
);
6402 exchanged
= CMPXCHG_TYPE(u8
, kaddr
, old
, new);
6405 exchanged
= CMPXCHG_TYPE(u16
, kaddr
, old
, new);
6408 exchanged
= CMPXCHG_TYPE(u32
, kaddr
, old
, new);
6411 exchanged
= CMPXCHG64(kaddr
, old
, new);
6417 kvm_vcpu_unmap(vcpu
, &map
, true);
6420 return X86EMUL_CMPXCHG_FAILED
;
6422 kvm_page_track_write(vcpu
, gpa
, new, bytes
);
6424 return X86EMUL_CONTINUE
;
6427 printk_once(KERN_WARNING
"kvm: emulating exchange as write\n");
6429 return emulator_write_emulated(ctxt
, addr
, new, bytes
, exception
);
6432 static int kernel_pio(struct kvm_vcpu
*vcpu
, void *pd
)
6436 for (i
= 0; i
< vcpu
->arch
.pio
.count
; i
++) {
6437 if (vcpu
->arch
.pio
.in
)
6438 r
= kvm_io_bus_read(vcpu
, KVM_PIO_BUS
, vcpu
->arch
.pio
.port
,
6439 vcpu
->arch
.pio
.size
, pd
);
6441 r
= kvm_io_bus_write(vcpu
, KVM_PIO_BUS
,
6442 vcpu
->arch
.pio
.port
, vcpu
->arch
.pio
.size
,
6446 pd
+= vcpu
->arch
.pio
.size
;
6451 static int emulator_pio_in_out(struct kvm_vcpu
*vcpu
, int size
,
6452 unsigned short port
, void *val
,
6453 unsigned int count
, bool in
)
6455 vcpu
->arch
.pio
.port
= port
;
6456 vcpu
->arch
.pio
.in
= in
;
6457 vcpu
->arch
.pio
.count
= count
;
6458 vcpu
->arch
.pio
.size
= size
;
6460 if (!kernel_pio(vcpu
, vcpu
->arch
.pio_data
)) {
6461 vcpu
->arch
.pio
.count
= 0;
6465 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
6466 vcpu
->run
->io
.direction
= in
? KVM_EXIT_IO_IN
: KVM_EXIT_IO_OUT
;
6467 vcpu
->run
->io
.size
= size
;
6468 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
6469 vcpu
->run
->io
.count
= count
;
6470 vcpu
->run
->io
.port
= port
;
6475 static int emulator_pio_in(struct kvm_vcpu
*vcpu
, int size
,
6476 unsigned short port
, void *val
, unsigned int count
)
6480 if (vcpu
->arch
.pio
.count
)
6483 memset(vcpu
->arch
.pio_data
, 0, size
* count
);
6485 ret
= emulator_pio_in_out(vcpu
, size
, port
, val
, count
, true);
6488 memcpy(val
, vcpu
->arch
.pio_data
, size
* count
);
6489 trace_kvm_pio(KVM_PIO_IN
, port
, size
, count
, vcpu
->arch
.pio_data
);
6490 vcpu
->arch
.pio
.count
= 0;
6497 static int emulator_pio_in_emulated(struct x86_emulate_ctxt
*ctxt
,
6498 int size
, unsigned short port
, void *val
,
6501 return emulator_pio_in(emul_to_vcpu(ctxt
), size
, port
, val
, count
);
6505 static int emulator_pio_out(struct kvm_vcpu
*vcpu
, int size
,
6506 unsigned short port
, const void *val
,
6509 memcpy(vcpu
->arch
.pio_data
, val
, size
* count
);
6510 trace_kvm_pio(KVM_PIO_OUT
, port
, size
, count
, vcpu
->arch
.pio_data
);
6511 return emulator_pio_in_out(vcpu
, size
, port
, (void *)val
, count
, false);
6514 static int emulator_pio_out_emulated(struct x86_emulate_ctxt
*ctxt
,
6515 int size
, unsigned short port
,
6516 const void *val
, unsigned int count
)
6518 return emulator_pio_out(emul_to_vcpu(ctxt
), size
, port
, val
, count
);
6521 static unsigned long get_segment_base(struct kvm_vcpu
*vcpu
, int seg
)
6523 return kvm_x86_ops
.get_segment_base(vcpu
, seg
);
6526 static void emulator_invlpg(struct x86_emulate_ctxt
*ctxt
, ulong address
)
6528 kvm_mmu_invlpg(emul_to_vcpu(ctxt
), address
);
6531 static int kvm_emulate_wbinvd_noskip(struct kvm_vcpu
*vcpu
)
6533 if (!need_emulate_wbinvd(vcpu
))
6534 return X86EMUL_CONTINUE
;
6536 if (kvm_x86_ops
.has_wbinvd_exit()) {
6537 int cpu
= get_cpu();
6539 cpumask_set_cpu(cpu
, vcpu
->arch
.wbinvd_dirty_mask
);
6540 smp_call_function_many(vcpu
->arch
.wbinvd_dirty_mask
,
6541 wbinvd_ipi
, NULL
, 1);
6543 cpumask_clear(vcpu
->arch
.wbinvd_dirty_mask
);
6546 return X86EMUL_CONTINUE
;
6549 int kvm_emulate_wbinvd(struct kvm_vcpu
*vcpu
)
6551 kvm_emulate_wbinvd_noskip(vcpu
);
6552 return kvm_skip_emulated_instruction(vcpu
);
6554 EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd
);
6558 static void emulator_wbinvd(struct x86_emulate_ctxt
*ctxt
)
6560 kvm_emulate_wbinvd_noskip(emul_to_vcpu(ctxt
));
6563 static int emulator_get_dr(struct x86_emulate_ctxt
*ctxt
, int dr
,
6564 unsigned long *dest
)
6566 return kvm_get_dr(emul_to_vcpu(ctxt
), dr
, dest
);
6569 static int emulator_set_dr(struct x86_emulate_ctxt
*ctxt
, int dr
,
6570 unsigned long value
)
6573 return __kvm_set_dr(emul_to_vcpu(ctxt
), dr
, value
);
6576 static u64
mk_cr_64(u64 curr_cr
, u32 new_val
)
6578 return (curr_cr
& ~((1ULL << 32) - 1)) | new_val
;
6581 static unsigned long emulator_get_cr(struct x86_emulate_ctxt
*ctxt
, int cr
)
6583 struct kvm_vcpu
*vcpu
= emul_to_vcpu(ctxt
);
6584 unsigned long value
;
6588 value
= kvm_read_cr0(vcpu
);
6591 value
= vcpu
->arch
.cr2
;
6594 value
= kvm_read_cr3(vcpu
);
6597 value
= kvm_read_cr4(vcpu
);
6600 value
= kvm_get_cr8(vcpu
);
6603 kvm_err("%s: unexpected cr %u\n", __func__
, cr
);
6610 static int emulator_set_cr(struct x86_emulate_ctxt
*ctxt
, int cr
, ulong val
)
6612 struct kvm_vcpu
*vcpu
= emul_to_vcpu(ctxt
);
6617 res
= kvm_set_cr0(vcpu
, mk_cr_64(kvm_read_cr0(vcpu
), val
));
6620 vcpu
->arch
.cr2
= val
;
6623 res
= kvm_set_cr3(vcpu
, val
);
6626 res
= kvm_set_cr4(vcpu
, mk_cr_64(kvm_read_cr4(vcpu
), val
));
6629 res
= kvm_set_cr8(vcpu
, val
);
6632 kvm_err("%s: unexpected cr %u\n", __func__
, cr
);
6639 static int emulator_get_cpl(struct x86_emulate_ctxt
*ctxt
)
6641 return kvm_x86_ops
.get_cpl(emul_to_vcpu(ctxt
));
6644 static void emulator_get_gdt(struct x86_emulate_ctxt
*ctxt
, struct desc_ptr
*dt
)
6646 kvm_x86_ops
.get_gdt(emul_to_vcpu(ctxt
), dt
);
6649 static void emulator_get_idt(struct x86_emulate_ctxt
*ctxt
, struct desc_ptr
*dt
)
6651 kvm_x86_ops
.get_idt(emul_to_vcpu(ctxt
), dt
);
6654 static void emulator_set_gdt(struct x86_emulate_ctxt
*ctxt
, struct desc_ptr
*dt
)
6656 kvm_x86_ops
.set_gdt(emul_to_vcpu(ctxt
), dt
);
6659 static void emulator_set_idt(struct x86_emulate_ctxt
*ctxt
, struct desc_ptr
*dt
)
6661 kvm_x86_ops
.set_idt(emul_to_vcpu(ctxt
), dt
);
6664 static unsigned long emulator_get_cached_segment_base(
6665 struct x86_emulate_ctxt
*ctxt
, int seg
)
6667 return get_segment_base(emul_to_vcpu(ctxt
), seg
);
6670 static bool emulator_get_segment(struct x86_emulate_ctxt
*ctxt
, u16
*selector
,
6671 struct desc_struct
*desc
, u32
*base3
,
6674 struct kvm_segment var
;
6676 kvm_get_segment(emul_to_vcpu(ctxt
), &var
, seg
);
6677 *selector
= var
.selector
;
6680 memset(desc
, 0, sizeof(*desc
));
6688 set_desc_limit(desc
, var
.limit
);
6689 set_desc_base(desc
, (unsigned long)var
.base
);
6690 #ifdef CONFIG_X86_64
6692 *base3
= var
.base
>> 32;
6694 desc
->type
= var
.type
;
6696 desc
->dpl
= var
.dpl
;
6697 desc
->p
= var
.present
;
6698 desc
->avl
= var
.avl
;
6706 static void emulator_set_segment(struct x86_emulate_ctxt
*ctxt
, u16 selector
,
6707 struct desc_struct
*desc
, u32 base3
,
6710 struct kvm_vcpu
*vcpu
= emul_to_vcpu(ctxt
);
6711 struct kvm_segment var
;
6713 var
.selector
= selector
;
6714 var
.base
= get_desc_base(desc
);
6715 #ifdef CONFIG_X86_64
6716 var
.base
|= ((u64
)base3
) << 32;
6718 var
.limit
= get_desc_limit(desc
);
6720 var
.limit
= (var
.limit
<< 12) | 0xfff;
6721 var
.type
= desc
->type
;
6722 var
.dpl
= desc
->dpl
;
6727 var
.avl
= desc
->avl
;
6728 var
.present
= desc
->p
;
6729 var
.unusable
= !var
.present
;
6732 kvm_set_segment(vcpu
, &var
, seg
);
6736 static int emulator_get_msr(struct x86_emulate_ctxt
*ctxt
,
6737 u32 msr_index
, u64
*pdata
)
6739 struct kvm_vcpu
*vcpu
= emul_to_vcpu(ctxt
);
6742 r
= kvm_get_msr(vcpu
, msr_index
, pdata
);
6744 if (r
&& kvm_get_msr_user_space(vcpu
, msr_index
, r
)) {
6745 /* Bounce to user space */
6746 return X86EMUL_IO_NEEDED
;
6752 static int emulator_set_msr(struct x86_emulate_ctxt
*ctxt
,
6753 u32 msr_index
, u64 data
)
6755 struct kvm_vcpu
*vcpu
= emul_to_vcpu(ctxt
);
6758 r
= kvm_set_msr(vcpu
, msr_index
, data
);
6760 if (r
&& kvm_set_msr_user_space(vcpu
, msr_index
, data
, r
)) {
6761 /* Bounce to user space */
6762 return X86EMUL_IO_NEEDED
;
6768 static u64
emulator_get_smbase(struct x86_emulate_ctxt
*ctxt
)
6770 struct kvm_vcpu
*vcpu
= emul_to_vcpu(ctxt
);
6772 return vcpu
->arch
.smbase
;
6775 static void emulator_set_smbase(struct x86_emulate_ctxt
*ctxt
, u64 smbase
)
6777 struct kvm_vcpu
*vcpu
= emul_to_vcpu(ctxt
);
6779 vcpu
->arch
.smbase
= smbase
;
6782 static int emulator_check_pmc(struct x86_emulate_ctxt
*ctxt
,
6785 return kvm_pmu_is_valid_rdpmc_ecx(emul_to_vcpu(ctxt
), pmc
);
6788 static int emulator_read_pmc(struct x86_emulate_ctxt
*ctxt
,
6789 u32 pmc
, u64
*pdata
)
6791 return kvm_pmu_rdpmc(emul_to_vcpu(ctxt
), pmc
, pdata
);
6794 static void emulator_halt(struct x86_emulate_ctxt
*ctxt
)
6796 emul_to_vcpu(ctxt
)->arch
.halt_request
= 1;
6799 static int emulator_intercept(struct x86_emulate_ctxt
*ctxt
,
6800 struct x86_instruction_info
*info
,
6801 enum x86_intercept_stage stage
)
6803 return kvm_x86_ops
.check_intercept(emul_to_vcpu(ctxt
), info
, stage
,
6807 static bool emulator_get_cpuid(struct x86_emulate_ctxt
*ctxt
,
6808 u32
*eax
, u32
*ebx
, u32
*ecx
, u32
*edx
,
6811 return kvm_cpuid(emul_to_vcpu(ctxt
), eax
, ebx
, ecx
, edx
, exact_only
);
6814 static bool emulator_guest_has_long_mode(struct x86_emulate_ctxt
*ctxt
)
6816 return guest_cpuid_has(emul_to_vcpu(ctxt
), X86_FEATURE_LM
);
6819 static bool emulator_guest_has_movbe(struct x86_emulate_ctxt
*ctxt
)
6821 return guest_cpuid_has(emul_to_vcpu(ctxt
), X86_FEATURE_MOVBE
);
6824 static bool emulator_guest_has_fxsr(struct x86_emulate_ctxt
*ctxt
)
6826 return guest_cpuid_has(emul_to_vcpu(ctxt
), X86_FEATURE_FXSR
);
6829 static ulong
emulator_read_gpr(struct x86_emulate_ctxt
*ctxt
, unsigned reg
)
6831 return kvm_register_read(emul_to_vcpu(ctxt
), reg
);
6834 static void emulator_write_gpr(struct x86_emulate_ctxt
*ctxt
, unsigned reg
, ulong val
)
6836 kvm_register_write(emul_to_vcpu(ctxt
), reg
, val
);
6839 static void emulator_set_nmi_mask(struct x86_emulate_ctxt
*ctxt
, bool masked
)
6841 kvm_x86_ops
.set_nmi_mask(emul_to_vcpu(ctxt
), masked
);
6844 static unsigned emulator_get_hflags(struct x86_emulate_ctxt
*ctxt
)
6846 return emul_to_vcpu(ctxt
)->arch
.hflags
;
6849 static void emulator_set_hflags(struct x86_emulate_ctxt
*ctxt
, unsigned emul_flags
)
6851 emul_to_vcpu(ctxt
)->arch
.hflags
= emul_flags
;
6854 static int emulator_pre_leave_smm(struct x86_emulate_ctxt
*ctxt
,
6855 const char *smstate
)
6857 return kvm_x86_ops
.pre_leave_smm(emul_to_vcpu(ctxt
), smstate
);
6860 static void emulator_post_leave_smm(struct x86_emulate_ctxt
*ctxt
)
6862 kvm_smm_changed(emul_to_vcpu(ctxt
));
6865 static int emulator_set_xcr(struct x86_emulate_ctxt
*ctxt
, u32 index
, u64 xcr
)
6867 return __kvm_set_xcr(emul_to_vcpu(ctxt
), index
, xcr
);
6870 static const struct x86_emulate_ops emulate_ops
= {
6871 .read_gpr
= emulator_read_gpr
,
6872 .write_gpr
= emulator_write_gpr
,
6873 .read_std
= emulator_read_std
,
6874 .write_std
= emulator_write_std
,
6875 .read_phys
= kvm_read_guest_phys_system
,
6876 .fetch
= kvm_fetch_guest_virt
,
6877 .read_emulated
= emulator_read_emulated
,
6878 .write_emulated
= emulator_write_emulated
,
6879 .cmpxchg_emulated
= emulator_cmpxchg_emulated
,
6880 .invlpg
= emulator_invlpg
,
6881 .pio_in_emulated
= emulator_pio_in_emulated
,
6882 .pio_out_emulated
= emulator_pio_out_emulated
,
6883 .get_segment
= emulator_get_segment
,
6884 .set_segment
= emulator_set_segment
,
6885 .get_cached_segment_base
= emulator_get_cached_segment_base
,
6886 .get_gdt
= emulator_get_gdt
,
6887 .get_idt
= emulator_get_idt
,
6888 .set_gdt
= emulator_set_gdt
,
6889 .set_idt
= emulator_set_idt
,
6890 .get_cr
= emulator_get_cr
,
6891 .set_cr
= emulator_set_cr
,
6892 .cpl
= emulator_get_cpl
,
6893 .get_dr
= emulator_get_dr
,
6894 .set_dr
= emulator_set_dr
,
6895 .get_smbase
= emulator_get_smbase
,
6896 .set_smbase
= emulator_set_smbase
,
6897 .set_msr
= emulator_set_msr
,
6898 .get_msr
= emulator_get_msr
,
6899 .check_pmc
= emulator_check_pmc
,
6900 .read_pmc
= emulator_read_pmc
,
6901 .halt
= emulator_halt
,
6902 .wbinvd
= emulator_wbinvd
,
6903 .fix_hypercall
= emulator_fix_hypercall
,
6904 .intercept
= emulator_intercept
,
6905 .get_cpuid
= emulator_get_cpuid
,
6906 .guest_has_long_mode
= emulator_guest_has_long_mode
,
6907 .guest_has_movbe
= emulator_guest_has_movbe
,
6908 .guest_has_fxsr
= emulator_guest_has_fxsr
,
6909 .set_nmi_mask
= emulator_set_nmi_mask
,
6910 .get_hflags
= emulator_get_hflags
,
6911 .set_hflags
= emulator_set_hflags
,
6912 .pre_leave_smm
= emulator_pre_leave_smm
,
6913 .post_leave_smm
= emulator_post_leave_smm
,
6914 .set_xcr
= emulator_set_xcr
,
6917 static void toggle_interruptibility(struct kvm_vcpu
*vcpu
, u32 mask
)
6919 u32 int_shadow
= kvm_x86_ops
.get_interrupt_shadow(vcpu
);
6921 * an sti; sti; sequence only disable interrupts for the first
6922 * instruction. So, if the last instruction, be it emulated or
6923 * not, left the system with the INT_STI flag enabled, it
6924 * means that the last instruction is an sti. We should not
6925 * leave the flag on in this case. The same goes for mov ss
6927 if (int_shadow
& mask
)
6929 if (unlikely(int_shadow
|| mask
)) {
6930 kvm_x86_ops
.set_interrupt_shadow(vcpu
, mask
);
6932 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
6936 static bool inject_emulated_exception(struct kvm_vcpu
*vcpu
)
6938 struct x86_emulate_ctxt
*ctxt
= vcpu
->arch
.emulate_ctxt
;
6939 if (ctxt
->exception
.vector
== PF_VECTOR
)
6940 return kvm_inject_emulated_page_fault(vcpu
, &ctxt
->exception
);
6942 if (ctxt
->exception
.error_code_valid
)
6943 kvm_queue_exception_e(vcpu
, ctxt
->exception
.vector
,
6944 ctxt
->exception
.error_code
);
6946 kvm_queue_exception(vcpu
, ctxt
->exception
.vector
);
6950 static struct x86_emulate_ctxt
*alloc_emulate_ctxt(struct kvm_vcpu
*vcpu
)
6952 struct x86_emulate_ctxt
*ctxt
;
6954 ctxt
= kmem_cache_zalloc(x86_emulator_cache
, GFP_KERNEL_ACCOUNT
);
6956 pr_err("kvm: failed to allocate vcpu's emulator\n");
6961 ctxt
->ops
= &emulate_ops
;
6962 vcpu
->arch
.emulate_ctxt
= ctxt
;
6967 static void init_emulate_ctxt(struct kvm_vcpu
*vcpu
)
6969 struct x86_emulate_ctxt
*ctxt
= vcpu
->arch
.emulate_ctxt
;
6972 kvm_x86_ops
.get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
6974 ctxt
->gpa_available
= false;
6975 ctxt
->eflags
= kvm_get_rflags(vcpu
);
6976 ctxt
->tf
= (ctxt
->eflags
& X86_EFLAGS_TF
) != 0;
6978 ctxt
->eip
= kvm_rip_read(vcpu
);
6979 ctxt
->mode
= (!is_protmode(vcpu
)) ? X86EMUL_MODE_REAL
:
6980 (ctxt
->eflags
& X86_EFLAGS_VM
) ? X86EMUL_MODE_VM86
:
6981 (cs_l
&& is_long_mode(vcpu
)) ? X86EMUL_MODE_PROT64
:
6982 cs_db
? X86EMUL_MODE_PROT32
:
6983 X86EMUL_MODE_PROT16
;
6984 BUILD_BUG_ON(HF_GUEST_MASK
!= X86EMUL_GUEST_MASK
);
6985 BUILD_BUG_ON(HF_SMM_MASK
!= X86EMUL_SMM_MASK
);
6986 BUILD_BUG_ON(HF_SMM_INSIDE_NMI_MASK
!= X86EMUL_SMM_INSIDE_NMI_MASK
);
6988 init_decode_cache(ctxt
);
6989 vcpu
->arch
.emulate_regs_need_sync_from_vcpu
= false;
6992 void kvm_inject_realmode_interrupt(struct kvm_vcpu
*vcpu
, int irq
, int inc_eip
)
6994 struct x86_emulate_ctxt
*ctxt
= vcpu
->arch
.emulate_ctxt
;
6997 init_emulate_ctxt(vcpu
);
7001 ctxt
->_eip
= ctxt
->eip
+ inc_eip
;
7002 ret
= emulate_int_real(ctxt
, irq
);
7004 if (ret
!= X86EMUL_CONTINUE
) {
7005 kvm_make_request(KVM_REQ_TRIPLE_FAULT
, vcpu
);
7007 ctxt
->eip
= ctxt
->_eip
;
7008 kvm_rip_write(vcpu
, ctxt
->eip
);
7009 kvm_set_rflags(vcpu
, ctxt
->eflags
);
7012 EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt
);
7014 static int handle_emulation_failure(struct kvm_vcpu
*vcpu
, int emulation_type
)
7016 ++vcpu
->stat
.insn_emulation_fail
;
7017 trace_kvm_emulate_insn_failed(vcpu
);
7019 if (emulation_type
& EMULTYPE_VMWARE_GP
) {
7020 kvm_queue_exception_e(vcpu
, GP_VECTOR
, 0);
7024 if (emulation_type
& EMULTYPE_SKIP
) {
7025 vcpu
->run
->exit_reason
= KVM_EXIT_INTERNAL_ERROR
;
7026 vcpu
->run
->internal
.suberror
= KVM_INTERNAL_ERROR_EMULATION
;
7027 vcpu
->run
->internal
.ndata
= 0;
7031 kvm_queue_exception(vcpu
, UD_VECTOR
);
7033 if (!is_guest_mode(vcpu
) && kvm_x86_ops
.get_cpl(vcpu
) == 0) {
7034 vcpu
->run
->exit_reason
= KVM_EXIT_INTERNAL_ERROR
;
7035 vcpu
->run
->internal
.suberror
= KVM_INTERNAL_ERROR_EMULATION
;
7036 vcpu
->run
->internal
.ndata
= 0;
7043 static bool reexecute_instruction(struct kvm_vcpu
*vcpu
, gpa_t cr2_or_gpa
,
7044 bool write_fault_to_shadow_pgtable
,
7047 gpa_t gpa
= cr2_or_gpa
;
7050 if (!(emulation_type
& EMULTYPE_ALLOW_RETRY_PF
))
7053 if (WARN_ON_ONCE(is_guest_mode(vcpu
)) ||
7054 WARN_ON_ONCE(!(emulation_type
& EMULTYPE_PF
)))
7057 if (!vcpu
->arch
.mmu
->direct_map
) {
7059 * Write permission should be allowed since only
7060 * write access need to be emulated.
7062 gpa
= kvm_mmu_gva_to_gpa_write(vcpu
, cr2_or_gpa
, NULL
);
7065 * If the mapping is invalid in guest, let cpu retry
7066 * it to generate fault.
7068 if (gpa
== UNMAPPED_GVA
)
7073 * Do not retry the unhandleable instruction if it faults on the
7074 * readonly host memory, otherwise it will goto a infinite loop:
7075 * retry instruction -> write #PF -> emulation fail -> retry
7076 * instruction -> ...
7078 pfn
= gfn_to_pfn(vcpu
->kvm
, gpa_to_gfn(gpa
));
7081 * If the instruction failed on the error pfn, it can not be fixed,
7082 * report the error to userspace.
7084 if (is_error_noslot_pfn(pfn
))
7087 kvm_release_pfn_clean(pfn
);
7089 /* The instructions are well-emulated on direct mmu. */
7090 if (vcpu
->arch
.mmu
->direct_map
) {
7091 unsigned int indirect_shadow_pages
;
7093 spin_lock(&vcpu
->kvm
->mmu_lock
);
7094 indirect_shadow_pages
= vcpu
->kvm
->arch
.indirect_shadow_pages
;
7095 spin_unlock(&vcpu
->kvm
->mmu_lock
);
7097 if (indirect_shadow_pages
)
7098 kvm_mmu_unprotect_page(vcpu
->kvm
, gpa_to_gfn(gpa
));
7104 * if emulation was due to access to shadowed page table
7105 * and it failed try to unshadow page and re-enter the
7106 * guest to let CPU execute the instruction.
7108 kvm_mmu_unprotect_page(vcpu
->kvm
, gpa_to_gfn(gpa
));
7111 * If the access faults on its page table, it can not
7112 * be fixed by unprotecting shadow page and it should
7113 * be reported to userspace.
7115 return !write_fault_to_shadow_pgtable
;
7118 static bool retry_instruction(struct x86_emulate_ctxt
*ctxt
,
7119 gpa_t cr2_or_gpa
, int emulation_type
)
7121 struct kvm_vcpu
*vcpu
= emul_to_vcpu(ctxt
);
7122 unsigned long last_retry_eip
, last_retry_addr
, gpa
= cr2_or_gpa
;
7124 last_retry_eip
= vcpu
->arch
.last_retry_eip
;
7125 last_retry_addr
= vcpu
->arch
.last_retry_addr
;
7128 * If the emulation is caused by #PF and it is non-page_table
7129 * writing instruction, it means the VM-EXIT is caused by shadow
7130 * page protected, we can zap the shadow page and retry this
7131 * instruction directly.
7133 * Note: if the guest uses a non-page-table modifying instruction
7134 * on the PDE that points to the instruction, then we will unmap
7135 * the instruction and go to an infinite loop. So, we cache the
7136 * last retried eip and the last fault address, if we meet the eip
7137 * and the address again, we can break out of the potential infinite
7140 vcpu
->arch
.last_retry_eip
= vcpu
->arch
.last_retry_addr
= 0;
7142 if (!(emulation_type
& EMULTYPE_ALLOW_RETRY_PF
))
7145 if (WARN_ON_ONCE(is_guest_mode(vcpu
)) ||
7146 WARN_ON_ONCE(!(emulation_type
& EMULTYPE_PF
)))
7149 if (x86_page_table_writing_insn(ctxt
))
7152 if (ctxt
->eip
== last_retry_eip
&& last_retry_addr
== cr2_or_gpa
)
7155 vcpu
->arch
.last_retry_eip
= ctxt
->eip
;
7156 vcpu
->arch
.last_retry_addr
= cr2_or_gpa
;
7158 if (!vcpu
->arch
.mmu
->direct_map
)
7159 gpa
= kvm_mmu_gva_to_gpa_write(vcpu
, cr2_or_gpa
, NULL
);
7161 kvm_mmu_unprotect_page(vcpu
->kvm
, gpa_to_gfn(gpa
));
7166 static int complete_emulated_mmio(struct kvm_vcpu
*vcpu
);
7167 static int complete_emulated_pio(struct kvm_vcpu
*vcpu
);
7169 static void kvm_smm_changed(struct kvm_vcpu
*vcpu
)
7171 if (!(vcpu
->arch
.hflags
& HF_SMM_MASK
)) {
7172 /* This is a good place to trace that we are exiting SMM. */
7173 trace_kvm_enter_smm(vcpu
->vcpu_id
, vcpu
->arch
.smbase
, false);
7175 /* Process a latched INIT or SMI, if any. */
7176 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
7179 kvm_mmu_reset_context(vcpu
);
7182 static int kvm_vcpu_check_hw_bp(unsigned long addr
, u32 type
, u32 dr7
,
7191 for (i
= 0; i
< 4; i
++, enable
>>= 2, rwlen
>>= 4)
7192 if ((enable
& 3) && (rwlen
& 15) == type
&& db
[i
] == addr
)
7197 static int kvm_vcpu_do_singlestep(struct kvm_vcpu
*vcpu
)
7199 struct kvm_run
*kvm_run
= vcpu
->run
;
7201 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
) {
7202 kvm_run
->debug
.arch
.dr6
= DR6_BS
| DR6_FIXED_1
| DR6_RTM
;
7203 kvm_run
->debug
.arch
.pc
= kvm_get_linear_rip(vcpu
);
7204 kvm_run
->debug
.arch
.exception
= DB_VECTOR
;
7205 kvm_run
->exit_reason
= KVM_EXIT_DEBUG
;
7208 kvm_queue_exception_p(vcpu
, DB_VECTOR
, DR6_BS
);
7212 int kvm_skip_emulated_instruction(struct kvm_vcpu
*vcpu
)
7214 unsigned long rflags
= kvm_x86_ops
.get_rflags(vcpu
);
7217 r
= kvm_x86_ops
.skip_emulated_instruction(vcpu
);
7222 * rflags is the old, "raw" value of the flags. The new value has
7223 * not been saved yet.
7225 * This is correct even for TF set by the guest, because "the
7226 * processor will not generate this exception after the instruction
7227 * that sets the TF flag".
7229 if (unlikely(rflags
& X86_EFLAGS_TF
))
7230 r
= kvm_vcpu_do_singlestep(vcpu
);
7233 EXPORT_SYMBOL_GPL(kvm_skip_emulated_instruction
);
7235 static bool kvm_vcpu_check_breakpoint(struct kvm_vcpu
*vcpu
, int *r
)
7237 if (unlikely(vcpu
->guest_debug
& KVM_GUESTDBG_USE_HW_BP
) &&
7238 (vcpu
->arch
.guest_debug_dr7
& DR7_BP_EN_MASK
)) {
7239 struct kvm_run
*kvm_run
= vcpu
->run
;
7240 unsigned long eip
= kvm_get_linear_rip(vcpu
);
7241 u32 dr6
= kvm_vcpu_check_hw_bp(eip
, 0,
7242 vcpu
->arch
.guest_debug_dr7
,
7246 kvm_run
->debug
.arch
.dr6
= dr6
| DR6_FIXED_1
| DR6_RTM
;
7247 kvm_run
->debug
.arch
.pc
= eip
;
7248 kvm_run
->debug
.arch
.exception
= DB_VECTOR
;
7249 kvm_run
->exit_reason
= KVM_EXIT_DEBUG
;
7255 if (unlikely(vcpu
->arch
.dr7
& DR7_BP_EN_MASK
) &&
7256 !(kvm_get_rflags(vcpu
) & X86_EFLAGS_RF
)) {
7257 unsigned long eip
= kvm_get_linear_rip(vcpu
);
7258 u32 dr6
= kvm_vcpu_check_hw_bp(eip
, 0,
7263 kvm_queue_exception_p(vcpu
, DB_VECTOR
, dr6
);
7272 static bool is_vmware_backdoor_opcode(struct x86_emulate_ctxt
*ctxt
)
7274 switch (ctxt
->opcode_len
) {
7281 case 0xe6: /* OUT */
7285 case 0x6c: /* INS */
7287 case 0x6e: /* OUTS */
7294 case 0x33: /* RDPMC */
7303 int x86_emulate_instruction(struct kvm_vcpu
*vcpu
, gpa_t cr2_or_gpa
,
7304 int emulation_type
, void *insn
, int insn_len
)
7307 struct x86_emulate_ctxt
*ctxt
= vcpu
->arch
.emulate_ctxt
;
7308 bool writeback
= true;
7309 bool write_fault_to_spt
;
7311 if (unlikely(!kvm_x86_ops
.can_emulate_instruction(vcpu
, insn
, insn_len
)))
7314 vcpu
->arch
.l1tf_flush_l1d
= true;
7317 * Clear write_fault_to_shadow_pgtable here to ensure it is
7320 write_fault_to_spt
= vcpu
->arch
.write_fault_to_shadow_pgtable
;
7321 vcpu
->arch
.write_fault_to_shadow_pgtable
= false;
7322 kvm_clear_exception_queue(vcpu
);
7324 if (!(emulation_type
& EMULTYPE_NO_DECODE
)) {
7325 init_emulate_ctxt(vcpu
);
7328 * We will reenter on the same instruction since
7329 * we do not set complete_userspace_io. This does not
7330 * handle watchpoints yet, those would be handled in
7333 if (!(emulation_type
& EMULTYPE_SKIP
) &&
7334 kvm_vcpu_check_breakpoint(vcpu
, &r
))
7337 ctxt
->interruptibility
= 0;
7338 ctxt
->have_exception
= false;
7339 ctxt
->exception
.vector
= -1;
7340 ctxt
->perm_ok
= false;
7342 ctxt
->ud
= emulation_type
& EMULTYPE_TRAP_UD
;
7344 r
= x86_decode_insn(ctxt
, insn
, insn_len
);
7346 trace_kvm_emulate_insn_start(vcpu
);
7347 ++vcpu
->stat
.insn_emulation
;
7348 if (r
!= EMULATION_OK
) {
7349 if ((emulation_type
& EMULTYPE_TRAP_UD
) ||
7350 (emulation_type
& EMULTYPE_TRAP_UD_FORCED
)) {
7351 kvm_queue_exception(vcpu
, UD_VECTOR
);
7354 if (reexecute_instruction(vcpu
, cr2_or_gpa
,
7358 if (ctxt
->have_exception
) {
7360 * #UD should result in just EMULATION_FAILED, and trap-like
7361 * exception should not be encountered during decode.
7363 WARN_ON_ONCE(ctxt
->exception
.vector
== UD_VECTOR
||
7364 exception_type(ctxt
->exception
.vector
) == EXCPT_TRAP
);
7365 inject_emulated_exception(vcpu
);
7368 return handle_emulation_failure(vcpu
, emulation_type
);
7372 if ((emulation_type
& EMULTYPE_VMWARE_GP
) &&
7373 !is_vmware_backdoor_opcode(ctxt
)) {
7374 kvm_queue_exception_e(vcpu
, GP_VECTOR
, 0);
7379 * Note, EMULTYPE_SKIP is intended for use *only* by vendor callbacks
7380 * for kvm_skip_emulated_instruction(). The caller is responsible for
7381 * updating interruptibility state and injecting single-step #DBs.
7383 if (emulation_type
& EMULTYPE_SKIP
) {
7384 kvm_rip_write(vcpu
, ctxt
->_eip
);
7385 if (ctxt
->eflags
& X86_EFLAGS_RF
)
7386 kvm_set_rflags(vcpu
, ctxt
->eflags
& ~X86_EFLAGS_RF
);
7390 if (retry_instruction(ctxt
, cr2_or_gpa
, emulation_type
))
7393 /* this is needed for vmware backdoor interface to work since it
7394 changes registers values during IO operation */
7395 if (vcpu
->arch
.emulate_regs_need_sync_from_vcpu
) {
7396 vcpu
->arch
.emulate_regs_need_sync_from_vcpu
= false;
7397 emulator_invalidate_register_cache(ctxt
);
7401 if (emulation_type
& EMULTYPE_PF
) {
7402 /* Save the faulting GPA (cr2) in the address field */
7403 ctxt
->exception
.address
= cr2_or_gpa
;
7405 /* With shadow page tables, cr2 contains a GVA or nGPA. */
7406 if (vcpu
->arch
.mmu
->direct_map
) {
7407 ctxt
->gpa_available
= true;
7408 ctxt
->gpa_val
= cr2_or_gpa
;
7411 /* Sanitize the address out of an abundance of paranoia. */
7412 ctxt
->exception
.address
= 0;
7415 r
= x86_emulate_insn(ctxt
);
7417 if (r
== EMULATION_INTERCEPTED
)
7420 if (r
== EMULATION_FAILED
) {
7421 if (reexecute_instruction(vcpu
, cr2_or_gpa
, write_fault_to_spt
,
7425 return handle_emulation_failure(vcpu
, emulation_type
);
7428 if (ctxt
->have_exception
) {
7430 if (inject_emulated_exception(vcpu
))
7432 } else if (vcpu
->arch
.pio
.count
) {
7433 if (!vcpu
->arch
.pio
.in
) {
7434 /* FIXME: return into emulator if single-stepping. */
7435 vcpu
->arch
.pio
.count
= 0;
7438 vcpu
->arch
.complete_userspace_io
= complete_emulated_pio
;
7441 } else if (vcpu
->mmio_needed
) {
7442 ++vcpu
->stat
.mmio_exits
;
7444 if (!vcpu
->mmio_is_write
)
7447 vcpu
->arch
.complete_userspace_io
= complete_emulated_mmio
;
7448 } else if (r
== EMULATION_RESTART
)
7454 unsigned long rflags
= kvm_x86_ops
.get_rflags(vcpu
);
7455 toggle_interruptibility(vcpu
, ctxt
->interruptibility
);
7456 vcpu
->arch
.emulate_regs_need_sync_to_vcpu
= false;
7457 if (!ctxt
->have_exception
||
7458 exception_type(ctxt
->exception
.vector
) == EXCPT_TRAP
) {
7459 kvm_rip_write(vcpu
, ctxt
->eip
);
7460 if (r
&& (ctxt
->tf
|| (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
)))
7461 r
= kvm_vcpu_do_singlestep(vcpu
);
7462 if (kvm_x86_ops
.update_emulated_instruction
)
7463 kvm_x86_ops
.update_emulated_instruction(vcpu
);
7464 __kvm_set_rflags(vcpu
, ctxt
->eflags
);
7468 * For STI, interrupts are shadowed; so KVM_REQ_EVENT will
7469 * do nothing, and it will be requested again as soon as
7470 * the shadow expires. But we still need to check here,
7471 * because POPF has no interrupt shadow.
7473 if (unlikely((ctxt
->eflags
& ~rflags
) & X86_EFLAGS_IF
))
7474 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
7476 vcpu
->arch
.emulate_regs_need_sync_to_vcpu
= true;
7481 int kvm_emulate_instruction(struct kvm_vcpu
*vcpu
, int emulation_type
)
7483 return x86_emulate_instruction(vcpu
, 0, emulation_type
, NULL
, 0);
7485 EXPORT_SYMBOL_GPL(kvm_emulate_instruction
);
7487 int kvm_emulate_instruction_from_buffer(struct kvm_vcpu
*vcpu
,
7488 void *insn
, int insn_len
)
7490 return x86_emulate_instruction(vcpu
, 0, 0, insn
, insn_len
);
7492 EXPORT_SYMBOL_GPL(kvm_emulate_instruction_from_buffer
);
7494 static int complete_fast_pio_out_port_0x7e(struct kvm_vcpu
*vcpu
)
7496 vcpu
->arch
.pio
.count
= 0;
7500 static int complete_fast_pio_out(struct kvm_vcpu
*vcpu
)
7502 vcpu
->arch
.pio
.count
= 0;
7504 if (unlikely(!kvm_is_linear_rip(vcpu
, vcpu
->arch
.pio
.linear_rip
)))
7507 return kvm_skip_emulated_instruction(vcpu
);
7510 static int kvm_fast_pio_out(struct kvm_vcpu
*vcpu
, int size
,
7511 unsigned short port
)
7513 unsigned long val
= kvm_rax_read(vcpu
);
7514 int ret
= emulator_pio_out(vcpu
, size
, port
, &val
, 1);
7520 * Workaround userspace that relies on old KVM behavior of %rip being
7521 * incremented prior to exiting to userspace to handle "OUT 0x7e".
7524 kvm_check_has_quirk(vcpu
->kvm
, KVM_X86_QUIRK_OUT_7E_INC_RIP
)) {
7525 vcpu
->arch
.complete_userspace_io
=
7526 complete_fast_pio_out_port_0x7e
;
7527 kvm_skip_emulated_instruction(vcpu
);
7529 vcpu
->arch
.pio
.linear_rip
= kvm_get_linear_rip(vcpu
);
7530 vcpu
->arch
.complete_userspace_io
= complete_fast_pio_out
;
7535 static int complete_fast_pio_in(struct kvm_vcpu
*vcpu
)
7539 /* We should only ever be called with arch.pio.count equal to 1 */
7540 BUG_ON(vcpu
->arch
.pio
.count
!= 1);
7542 if (unlikely(!kvm_is_linear_rip(vcpu
, vcpu
->arch
.pio
.linear_rip
))) {
7543 vcpu
->arch
.pio
.count
= 0;
7547 /* For size less than 4 we merge, else we zero extend */
7548 val
= (vcpu
->arch
.pio
.size
< 4) ? kvm_rax_read(vcpu
) : 0;
7551 * Since vcpu->arch.pio.count == 1 let emulator_pio_in perform
7552 * the copy and tracing
7554 emulator_pio_in(vcpu
, vcpu
->arch
.pio
.size
, vcpu
->arch
.pio
.port
, &val
, 1);
7555 kvm_rax_write(vcpu
, val
);
7557 return kvm_skip_emulated_instruction(vcpu
);
7560 static int kvm_fast_pio_in(struct kvm_vcpu
*vcpu
, int size
,
7561 unsigned short port
)
7566 /* For size less than 4 we merge, else we zero extend */
7567 val
= (size
< 4) ? kvm_rax_read(vcpu
) : 0;
7569 ret
= emulator_pio_in(vcpu
, size
, port
, &val
, 1);
7571 kvm_rax_write(vcpu
, val
);
7575 vcpu
->arch
.pio
.linear_rip
= kvm_get_linear_rip(vcpu
);
7576 vcpu
->arch
.complete_userspace_io
= complete_fast_pio_in
;
7581 int kvm_fast_pio(struct kvm_vcpu
*vcpu
, int size
, unsigned short port
, int in
)
7586 ret
= kvm_fast_pio_in(vcpu
, size
, port
);
7588 ret
= kvm_fast_pio_out(vcpu
, size
, port
);
7589 return ret
&& kvm_skip_emulated_instruction(vcpu
);
7591 EXPORT_SYMBOL_GPL(kvm_fast_pio
);
7593 static int kvmclock_cpu_down_prep(unsigned int cpu
)
7595 __this_cpu_write(cpu_tsc_khz
, 0);
7599 static void tsc_khz_changed(void *data
)
7601 struct cpufreq_freqs
*freq
= data
;
7602 unsigned long khz
= 0;
7606 else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC
))
7607 khz
= cpufreq_quick_get(raw_smp_processor_id());
7610 __this_cpu_write(cpu_tsc_khz
, khz
);
7613 #ifdef CONFIG_X86_64
7614 static void kvm_hyperv_tsc_notifier(void)
7617 struct kvm_vcpu
*vcpu
;
7620 mutex_lock(&kvm_lock
);
7621 list_for_each_entry(kvm
, &vm_list
, vm_list
)
7622 kvm_make_mclock_inprogress_request(kvm
);
7624 hyperv_stop_tsc_emulation();
7626 /* TSC frequency always matches when on Hyper-V */
7627 for_each_present_cpu(cpu
)
7628 per_cpu(cpu_tsc_khz
, cpu
) = tsc_khz
;
7629 kvm_max_guest_tsc_khz
= tsc_khz
;
7631 list_for_each_entry(kvm
, &vm_list
, vm_list
) {
7632 struct kvm_arch
*ka
= &kvm
->arch
;
7634 spin_lock(&ka
->pvclock_gtod_sync_lock
);
7636 pvclock_update_vm_gtod_copy(kvm
);
7638 kvm_for_each_vcpu(cpu
, vcpu
, kvm
)
7639 kvm_make_request(KVM_REQ_CLOCK_UPDATE
, vcpu
);
7641 kvm_for_each_vcpu(cpu
, vcpu
, kvm
)
7642 kvm_clear_request(KVM_REQ_MCLOCK_INPROGRESS
, vcpu
);
7644 spin_unlock(&ka
->pvclock_gtod_sync_lock
);
7646 mutex_unlock(&kvm_lock
);
7650 static void __kvmclock_cpufreq_notifier(struct cpufreq_freqs
*freq
, int cpu
)
7653 struct kvm_vcpu
*vcpu
;
7654 int i
, send_ipi
= 0;
7657 * We allow guests to temporarily run on slowing clocks,
7658 * provided we notify them after, or to run on accelerating
7659 * clocks, provided we notify them before. Thus time never
7662 * However, we have a problem. We can't atomically update
7663 * the frequency of a given CPU from this function; it is
7664 * merely a notifier, which can be called from any CPU.
7665 * Changing the TSC frequency at arbitrary points in time
7666 * requires a recomputation of local variables related to
7667 * the TSC for each VCPU. We must flag these local variables
7668 * to be updated and be sure the update takes place with the
7669 * new frequency before any guests proceed.
7671 * Unfortunately, the combination of hotplug CPU and frequency
7672 * change creates an intractable locking scenario; the order
7673 * of when these callouts happen is undefined with respect to
7674 * CPU hotplug, and they can race with each other. As such,
7675 * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is
7676 * undefined; you can actually have a CPU frequency change take
7677 * place in between the computation of X and the setting of the
7678 * variable. To protect against this problem, all updates of
7679 * the per_cpu tsc_khz variable are done in an interrupt
7680 * protected IPI, and all callers wishing to update the value
7681 * must wait for a synchronous IPI to complete (which is trivial
7682 * if the caller is on the CPU already). This establishes the
7683 * necessary total order on variable updates.
7685 * Note that because a guest time update may take place
7686 * anytime after the setting of the VCPU's request bit, the
7687 * correct TSC value must be set before the request. However,
7688 * to ensure the update actually makes it to any guest which
7689 * starts running in hardware virtualization between the set
7690 * and the acquisition of the spinlock, we must also ping the
7691 * CPU after setting the request bit.
7695 smp_call_function_single(cpu
, tsc_khz_changed
, freq
, 1);
7697 mutex_lock(&kvm_lock
);
7698 list_for_each_entry(kvm
, &vm_list
, vm_list
) {
7699 kvm_for_each_vcpu(i
, vcpu
, kvm
) {
7700 if (vcpu
->cpu
!= cpu
)
7702 kvm_make_request(KVM_REQ_CLOCK_UPDATE
, vcpu
);
7703 if (vcpu
->cpu
!= raw_smp_processor_id())
7707 mutex_unlock(&kvm_lock
);
7709 if (freq
->old
< freq
->new && send_ipi
) {
7711 * We upscale the frequency. Must make the guest
7712 * doesn't see old kvmclock values while running with
7713 * the new frequency, otherwise we risk the guest sees
7714 * time go backwards.
7716 * In case we update the frequency for another cpu
7717 * (which might be in guest context) send an interrupt
7718 * to kick the cpu out of guest context. Next time
7719 * guest context is entered kvmclock will be updated,
7720 * so the guest will not see stale values.
7722 smp_call_function_single(cpu
, tsc_khz_changed
, freq
, 1);
7726 static int kvmclock_cpufreq_notifier(struct notifier_block
*nb
, unsigned long val
,
7729 struct cpufreq_freqs
*freq
= data
;
7732 if (val
== CPUFREQ_PRECHANGE
&& freq
->old
> freq
->new)
7734 if (val
== CPUFREQ_POSTCHANGE
&& freq
->old
< freq
->new)
7737 for_each_cpu(cpu
, freq
->policy
->cpus
)
7738 __kvmclock_cpufreq_notifier(freq
, cpu
);
7743 static struct notifier_block kvmclock_cpufreq_notifier_block
= {
7744 .notifier_call
= kvmclock_cpufreq_notifier
7747 static int kvmclock_cpu_online(unsigned int cpu
)
7749 tsc_khz_changed(NULL
);
7753 static void kvm_timer_init(void)
7755 max_tsc_khz
= tsc_khz
;
7757 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC
)) {
7758 #ifdef CONFIG_CPU_FREQ
7759 struct cpufreq_policy
*policy
;
7763 policy
= cpufreq_cpu_get(cpu
);
7765 if (policy
->cpuinfo
.max_freq
)
7766 max_tsc_khz
= policy
->cpuinfo
.max_freq
;
7767 cpufreq_cpu_put(policy
);
7771 cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block
,
7772 CPUFREQ_TRANSITION_NOTIFIER
);
7775 cpuhp_setup_state(CPUHP_AP_X86_KVM_CLK_ONLINE
, "x86/kvm/clk:online",
7776 kvmclock_cpu_online
, kvmclock_cpu_down_prep
);
7779 DEFINE_PER_CPU(struct kvm_vcpu
*, current_vcpu
);
7780 EXPORT_PER_CPU_SYMBOL_GPL(current_vcpu
);
7782 int kvm_is_in_guest(void)
7784 return __this_cpu_read(current_vcpu
) != NULL
;
7787 static int kvm_is_user_mode(void)
7791 if (__this_cpu_read(current_vcpu
))
7792 user_mode
= kvm_x86_ops
.get_cpl(__this_cpu_read(current_vcpu
));
7794 return user_mode
!= 0;
7797 static unsigned long kvm_get_guest_ip(void)
7799 unsigned long ip
= 0;
7801 if (__this_cpu_read(current_vcpu
))
7802 ip
= kvm_rip_read(__this_cpu_read(current_vcpu
));
7807 static void kvm_handle_intel_pt_intr(void)
7809 struct kvm_vcpu
*vcpu
= __this_cpu_read(current_vcpu
);
7811 kvm_make_request(KVM_REQ_PMI
, vcpu
);
7812 __set_bit(MSR_CORE_PERF_GLOBAL_OVF_CTRL_TRACE_TOPA_PMI_BIT
,
7813 (unsigned long *)&vcpu
->arch
.pmu
.global_status
);
7816 static struct perf_guest_info_callbacks kvm_guest_cbs
= {
7817 .is_in_guest
= kvm_is_in_guest
,
7818 .is_user_mode
= kvm_is_user_mode
,
7819 .get_guest_ip
= kvm_get_guest_ip
,
7820 .handle_intel_pt_intr
= kvm_handle_intel_pt_intr
,
7823 #ifdef CONFIG_X86_64
7824 static void pvclock_gtod_update_fn(struct work_struct
*work
)
7828 struct kvm_vcpu
*vcpu
;
7831 mutex_lock(&kvm_lock
);
7832 list_for_each_entry(kvm
, &vm_list
, vm_list
)
7833 kvm_for_each_vcpu(i
, vcpu
, kvm
)
7834 kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE
, vcpu
);
7835 atomic_set(&kvm_guest_has_master_clock
, 0);
7836 mutex_unlock(&kvm_lock
);
7839 static DECLARE_WORK(pvclock_gtod_work
, pvclock_gtod_update_fn
);
7842 * Notification about pvclock gtod data update.
7844 static int pvclock_gtod_notify(struct notifier_block
*nb
, unsigned long unused
,
7847 struct pvclock_gtod_data
*gtod
= &pvclock_gtod_data
;
7848 struct timekeeper
*tk
= priv
;
7850 update_pvclock_gtod(tk
);
7852 /* disable master clock if host does not trust, or does not
7853 * use, TSC based clocksource.
7855 if (!gtod_is_based_on_tsc(gtod
->clock
.vclock_mode
) &&
7856 atomic_read(&kvm_guest_has_master_clock
) != 0)
7857 queue_work(system_long_wq
, &pvclock_gtod_work
);
7862 static struct notifier_block pvclock_gtod_notifier
= {
7863 .notifier_call
= pvclock_gtod_notify
,
7867 int kvm_arch_init(void *opaque
)
7869 struct kvm_x86_init_ops
*ops
= opaque
;
7872 if (kvm_x86_ops
.hardware_enable
) {
7873 printk(KERN_ERR
"kvm: already loaded the other module\n");
7878 if (!ops
->cpu_has_kvm_support()) {
7879 pr_err_ratelimited("kvm: no hardware support\n");
7883 if (ops
->disabled_by_bios()) {
7884 pr_err_ratelimited("kvm: disabled by bios\n");
7890 * KVM explicitly assumes that the guest has an FPU and
7891 * FXSAVE/FXRSTOR. For example, the KVM_GET_FPU explicitly casts the
7892 * vCPU's FPU state as a fxregs_state struct.
7894 if (!boot_cpu_has(X86_FEATURE_FPU
) || !boot_cpu_has(X86_FEATURE_FXSR
)) {
7895 printk(KERN_ERR
"kvm: inadequate fpu\n");
7901 x86_fpu_cache
= kmem_cache_create("x86_fpu", sizeof(struct fpu
),
7902 __alignof__(struct fpu
), SLAB_ACCOUNT
,
7904 if (!x86_fpu_cache
) {
7905 printk(KERN_ERR
"kvm: failed to allocate cache for x86 fpu\n");
7909 x86_emulator_cache
= kvm_alloc_emulator_cache();
7910 if (!x86_emulator_cache
) {
7911 pr_err("kvm: failed to allocate cache for x86 emulator\n");
7912 goto out_free_x86_fpu_cache
;
7915 user_return_msrs
= alloc_percpu(struct kvm_user_return_msrs
);
7916 if (!user_return_msrs
) {
7917 printk(KERN_ERR
"kvm: failed to allocate percpu kvm_user_return_msrs\n");
7918 goto out_free_x86_emulator_cache
;
7921 r
= kvm_mmu_module_init();
7923 goto out_free_percpu
;
7925 kvm_mmu_set_mask_ptes(PT_USER_MASK
, PT_ACCESSED_MASK
,
7926 PT_DIRTY_MASK
, PT64_NX_MASK
, 0,
7927 PT_PRESENT_MASK
, 0, sme_me_mask
);
7930 perf_register_guest_info_callbacks(&kvm_guest_cbs
);
7932 if (boot_cpu_has(X86_FEATURE_XSAVE
)) {
7933 host_xcr0
= xgetbv(XCR_XFEATURE_ENABLED_MASK
);
7934 supported_xcr0
= host_xcr0
& KVM_SUPPORTED_XCR0
;
7938 if (pi_inject_timer
== -1)
7939 pi_inject_timer
= housekeeping_enabled(HK_FLAG_TIMER
);
7940 #ifdef CONFIG_X86_64
7941 pvclock_gtod_register_notifier(&pvclock_gtod_notifier
);
7943 if (hypervisor_is_type(X86_HYPER_MS_HYPERV
))
7944 set_hv_tscchange_cb(kvm_hyperv_tsc_notifier
);
7950 free_percpu(user_return_msrs
);
7951 out_free_x86_emulator_cache
:
7952 kmem_cache_destroy(x86_emulator_cache
);
7953 out_free_x86_fpu_cache
:
7954 kmem_cache_destroy(x86_fpu_cache
);
7959 void kvm_arch_exit(void)
7961 #ifdef CONFIG_X86_64
7962 if (hypervisor_is_type(X86_HYPER_MS_HYPERV
))
7963 clear_hv_tscchange_cb();
7966 perf_unregister_guest_info_callbacks(&kvm_guest_cbs
);
7968 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC
))
7969 cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block
,
7970 CPUFREQ_TRANSITION_NOTIFIER
);
7971 cpuhp_remove_state_nocalls(CPUHP_AP_X86_KVM_CLK_ONLINE
);
7972 #ifdef CONFIG_X86_64
7973 pvclock_gtod_unregister_notifier(&pvclock_gtod_notifier
);
7975 kvm_x86_ops
.hardware_enable
= NULL
;
7976 kvm_mmu_module_exit();
7977 free_percpu(user_return_msrs
);
7978 kmem_cache_destroy(x86_fpu_cache
);
7981 static int __kvm_vcpu_halt(struct kvm_vcpu
*vcpu
, int state
, int reason
)
7983 ++vcpu
->stat
.halt_exits
;
7984 if (lapic_in_kernel(vcpu
)) {
7985 vcpu
->arch
.mp_state
= state
;
7988 vcpu
->run
->exit_reason
= reason
;
7993 int kvm_vcpu_halt(struct kvm_vcpu
*vcpu
)
7995 return __kvm_vcpu_halt(vcpu
, KVM_MP_STATE_HALTED
, KVM_EXIT_HLT
);
7997 EXPORT_SYMBOL_GPL(kvm_vcpu_halt
);
7999 int kvm_emulate_halt(struct kvm_vcpu
*vcpu
)
8001 int ret
= kvm_skip_emulated_instruction(vcpu
);
8003 * TODO: we might be squashing a GUESTDBG_SINGLESTEP-triggered
8004 * KVM_EXIT_DEBUG here.
8006 return kvm_vcpu_halt(vcpu
) && ret
;
8008 EXPORT_SYMBOL_GPL(kvm_emulate_halt
);
8010 int kvm_emulate_ap_reset_hold(struct kvm_vcpu
*vcpu
)
8012 int ret
= kvm_skip_emulated_instruction(vcpu
);
8014 return __kvm_vcpu_halt(vcpu
, KVM_MP_STATE_AP_RESET_HOLD
, KVM_EXIT_AP_RESET_HOLD
) && ret
;
8016 EXPORT_SYMBOL_GPL(kvm_emulate_ap_reset_hold
);
8018 #ifdef CONFIG_X86_64
8019 static int kvm_pv_clock_pairing(struct kvm_vcpu
*vcpu
, gpa_t paddr
,
8020 unsigned long clock_type
)
8022 struct kvm_clock_pairing clock_pairing
;
8023 struct timespec64 ts
;
8027 if (clock_type
!= KVM_CLOCK_PAIRING_WALLCLOCK
)
8028 return -KVM_EOPNOTSUPP
;
8030 if (kvm_get_walltime_and_clockread(&ts
, &cycle
) == false)
8031 return -KVM_EOPNOTSUPP
;
8033 clock_pairing
.sec
= ts
.tv_sec
;
8034 clock_pairing
.nsec
= ts
.tv_nsec
;
8035 clock_pairing
.tsc
= kvm_read_l1_tsc(vcpu
, cycle
);
8036 clock_pairing
.flags
= 0;
8037 memset(&clock_pairing
.pad
, 0, sizeof(clock_pairing
.pad
));
8040 if (kvm_write_guest(vcpu
->kvm
, paddr
, &clock_pairing
,
8041 sizeof(struct kvm_clock_pairing
)))
8049 * kvm_pv_kick_cpu_op: Kick a vcpu.
8051 * @apicid - apicid of vcpu to be kicked.
8053 static void kvm_pv_kick_cpu_op(struct kvm
*kvm
, unsigned long flags
, int apicid
)
8055 struct kvm_lapic_irq lapic_irq
;
8057 lapic_irq
.shorthand
= APIC_DEST_NOSHORT
;
8058 lapic_irq
.dest_mode
= APIC_DEST_PHYSICAL
;
8059 lapic_irq
.level
= 0;
8060 lapic_irq
.dest_id
= apicid
;
8061 lapic_irq
.msi_redir_hint
= false;
8063 lapic_irq
.delivery_mode
= APIC_DM_REMRD
;
8064 kvm_irq_delivery_to_apic(kvm
, NULL
, &lapic_irq
, NULL
);
8067 bool kvm_apicv_activated(struct kvm
*kvm
)
8069 return (READ_ONCE(kvm
->arch
.apicv_inhibit_reasons
) == 0);
8071 EXPORT_SYMBOL_GPL(kvm_apicv_activated
);
8073 void kvm_apicv_init(struct kvm
*kvm
, bool enable
)
8076 clear_bit(APICV_INHIBIT_REASON_DISABLE
,
8077 &kvm
->arch
.apicv_inhibit_reasons
);
8079 set_bit(APICV_INHIBIT_REASON_DISABLE
,
8080 &kvm
->arch
.apicv_inhibit_reasons
);
8082 EXPORT_SYMBOL_GPL(kvm_apicv_init
);
8084 static void kvm_sched_yield(struct kvm
*kvm
, unsigned long dest_id
)
8086 struct kvm_vcpu
*target
= NULL
;
8087 struct kvm_apic_map
*map
;
8090 map
= rcu_dereference(kvm
->arch
.apic_map
);
8092 if (likely(map
) && dest_id
<= map
->max_apic_id
&& map
->phys_map
[dest_id
])
8093 target
= map
->phys_map
[dest_id
]->vcpu
;
8097 if (target
&& READ_ONCE(target
->ready
))
8098 kvm_vcpu_yield_to(target
);
8101 int kvm_emulate_hypercall(struct kvm_vcpu
*vcpu
)
8103 unsigned long nr
, a0
, a1
, a2
, a3
, ret
;
8106 if (kvm_hv_hypercall_enabled(vcpu
->kvm
))
8107 return kvm_hv_hypercall(vcpu
);
8109 nr
= kvm_rax_read(vcpu
);
8110 a0
= kvm_rbx_read(vcpu
);
8111 a1
= kvm_rcx_read(vcpu
);
8112 a2
= kvm_rdx_read(vcpu
);
8113 a3
= kvm_rsi_read(vcpu
);
8115 trace_kvm_hypercall(nr
, a0
, a1
, a2
, a3
);
8117 op_64_bit
= is_64_bit_mode(vcpu
);
8126 if (kvm_x86_ops
.get_cpl(vcpu
) != 0) {
8134 case KVM_HC_VAPIC_POLL_IRQ
:
8137 case KVM_HC_KICK_CPU
:
8138 if (!guest_pv_has(vcpu
, KVM_FEATURE_PV_UNHALT
))
8141 kvm_pv_kick_cpu_op(vcpu
->kvm
, a0
, a1
);
8142 kvm_sched_yield(vcpu
->kvm
, a1
);
8145 #ifdef CONFIG_X86_64
8146 case KVM_HC_CLOCK_PAIRING
:
8147 ret
= kvm_pv_clock_pairing(vcpu
, a0
, a1
);
8150 case KVM_HC_SEND_IPI
:
8151 if (!guest_pv_has(vcpu
, KVM_FEATURE_PV_SEND_IPI
))
8154 ret
= kvm_pv_send_ipi(vcpu
->kvm
, a0
, a1
, a2
, a3
, op_64_bit
);
8156 case KVM_HC_SCHED_YIELD
:
8157 if (!guest_pv_has(vcpu
, KVM_FEATURE_PV_SCHED_YIELD
))
8160 kvm_sched_yield(vcpu
->kvm
, a0
);
8170 kvm_rax_write(vcpu
, ret
);
8172 ++vcpu
->stat
.hypercalls
;
8173 return kvm_skip_emulated_instruction(vcpu
);
8175 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall
);
8177 static int emulator_fix_hypercall(struct x86_emulate_ctxt
*ctxt
)
8179 struct kvm_vcpu
*vcpu
= emul_to_vcpu(ctxt
);
8180 char instruction
[3];
8181 unsigned long rip
= kvm_rip_read(vcpu
);
8183 kvm_x86_ops
.patch_hypercall(vcpu
, instruction
);
8185 return emulator_write_emulated(ctxt
, rip
, instruction
, 3,
8189 static int dm_request_for_irq_injection(struct kvm_vcpu
*vcpu
)
8191 return vcpu
->run
->request_interrupt_window
&&
8192 likely(!pic_in_kernel(vcpu
->kvm
));
8195 static void post_kvm_run_save(struct kvm_vcpu
*vcpu
)
8197 struct kvm_run
*kvm_run
= vcpu
->run
;
8200 * if_flag is obsolete and useless, so do not bother
8201 * setting it for SEV-ES guests. Userspace can just
8202 * use kvm_run->ready_for_interrupt_injection.
8204 kvm_run
->if_flag
= !vcpu
->arch
.guest_state_protected
8205 && (kvm_get_rflags(vcpu
) & X86_EFLAGS_IF
) != 0;
8207 kvm_run
->flags
= is_smm(vcpu
) ? KVM_RUN_X86_SMM
: 0;
8208 kvm_run
->cr8
= kvm_get_cr8(vcpu
);
8209 kvm_run
->apic_base
= kvm_get_apic_base(vcpu
);
8210 kvm_run
->ready_for_interrupt_injection
=
8211 pic_in_kernel(vcpu
->kvm
) ||
8212 kvm_vcpu_ready_for_interrupt_injection(vcpu
);
8215 static void update_cr8_intercept(struct kvm_vcpu
*vcpu
)
8219 if (!kvm_x86_ops
.update_cr8_intercept
)
8222 if (!lapic_in_kernel(vcpu
))
8225 if (vcpu
->arch
.apicv_active
)
8228 if (!vcpu
->arch
.apic
->vapic_addr
)
8229 max_irr
= kvm_lapic_find_highest_irr(vcpu
);
8236 tpr
= kvm_lapic_get_cr8(vcpu
);
8238 kvm_x86_ops
.update_cr8_intercept(vcpu
, tpr
, max_irr
);
8241 static void inject_pending_event(struct kvm_vcpu
*vcpu
, bool *req_immediate_exit
)
8244 bool can_inject
= true;
8246 /* try to reinject previous events if any */
8248 if (vcpu
->arch
.exception
.injected
) {
8249 kvm_x86_ops
.queue_exception(vcpu
);
8253 * Do not inject an NMI or interrupt if there is a pending
8254 * exception. Exceptions and interrupts are recognized at
8255 * instruction boundaries, i.e. the start of an instruction.
8256 * Trap-like exceptions, e.g. #DB, have higher priority than
8257 * NMIs and interrupts, i.e. traps are recognized before an
8258 * NMI/interrupt that's pending on the same instruction.
8259 * Fault-like exceptions, e.g. #GP and #PF, are the lowest
8260 * priority, but are only generated (pended) during instruction
8261 * execution, i.e. a pending fault-like exception means the
8262 * fault occurred on the *previous* instruction and must be
8263 * serviced prior to recognizing any new events in order to
8264 * fully complete the previous instruction.
8266 else if (!vcpu
->arch
.exception
.pending
) {
8267 if (vcpu
->arch
.nmi_injected
) {
8268 kvm_x86_ops
.set_nmi(vcpu
);
8270 } else if (vcpu
->arch
.interrupt
.injected
) {
8271 kvm_x86_ops
.set_irq(vcpu
);
8276 WARN_ON_ONCE(vcpu
->arch
.exception
.injected
&&
8277 vcpu
->arch
.exception
.pending
);
8280 * Call check_nested_events() even if we reinjected a previous event
8281 * in order for caller to determine if it should require immediate-exit
8282 * from L2 to L1 due to pending L1 events which require exit
8285 if (is_guest_mode(vcpu
)) {
8286 r
= kvm_x86_ops
.nested_ops
->check_events(vcpu
);
8291 /* try to inject new event if pending */
8292 if (vcpu
->arch
.exception
.pending
) {
8293 trace_kvm_inj_exception(vcpu
->arch
.exception
.nr
,
8294 vcpu
->arch
.exception
.has_error_code
,
8295 vcpu
->arch
.exception
.error_code
);
8297 vcpu
->arch
.exception
.pending
= false;
8298 vcpu
->arch
.exception
.injected
= true;
8300 if (exception_type(vcpu
->arch
.exception
.nr
) == EXCPT_FAULT
)
8301 __kvm_set_rflags(vcpu
, kvm_get_rflags(vcpu
) |
8304 if (vcpu
->arch
.exception
.nr
== DB_VECTOR
) {
8305 kvm_deliver_exception_payload(vcpu
);
8306 if (vcpu
->arch
.dr7
& DR7_GD
) {
8307 vcpu
->arch
.dr7
&= ~DR7_GD
;
8308 kvm_update_dr7(vcpu
);
8312 kvm_x86_ops
.queue_exception(vcpu
);
8317 * Finally, inject interrupt events. If an event cannot be injected
8318 * due to architectural conditions (e.g. IF=0) a window-open exit
8319 * will re-request KVM_REQ_EVENT. Sometimes however an event is pending
8320 * and can architecturally be injected, but we cannot do it right now:
8321 * an interrupt could have arrived just now and we have to inject it
8322 * as a vmexit, or there could already an event in the queue, which is
8323 * indicated by can_inject. In that case we request an immediate exit
8324 * in order to make progress and get back here for another iteration.
8325 * The kvm_x86_ops hooks communicate this by returning -EBUSY.
8327 if (vcpu
->arch
.smi_pending
) {
8328 r
= can_inject
? kvm_x86_ops
.smi_allowed(vcpu
, true) : -EBUSY
;
8332 vcpu
->arch
.smi_pending
= false;
8333 ++vcpu
->arch
.smi_count
;
8337 kvm_x86_ops
.enable_smi_window(vcpu
);
8340 if (vcpu
->arch
.nmi_pending
) {
8341 r
= can_inject
? kvm_x86_ops
.nmi_allowed(vcpu
, true) : -EBUSY
;
8345 --vcpu
->arch
.nmi_pending
;
8346 vcpu
->arch
.nmi_injected
= true;
8347 kvm_x86_ops
.set_nmi(vcpu
);
8349 WARN_ON(kvm_x86_ops
.nmi_allowed(vcpu
, true) < 0);
8351 if (vcpu
->arch
.nmi_pending
)
8352 kvm_x86_ops
.enable_nmi_window(vcpu
);
8355 if (kvm_cpu_has_injectable_intr(vcpu
)) {
8356 r
= can_inject
? kvm_x86_ops
.interrupt_allowed(vcpu
, true) : -EBUSY
;
8360 kvm_queue_interrupt(vcpu
, kvm_cpu_get_interrupt(vcpu
), false);
8361 kvm_x86_ops
.set_irq(vcpu
);
8362 WARN_ON(kvm_x86_ops
.interrupt_allowed(vcpu
, true) < 0);
8364 if (kvm_cpu_has_injectable_intr(vcpu
))
8365 kvm_x86_ops
.enable_irq_window(vcpu
);
8368 if (is_guest_mode(vcpu
) &&
8369 kvm_x86_ops
.nested_ops
->hv_timer_pending
&&
8370 kvm_x86_ops
.nested_ops
->hv_timer_pending(vcpu
))
8371 *req_immediate_exit
= true;
8373 WARN_ON(vcpu
->arch
.exception
.pending
);
8377 *req_immediate_exit
= true;
8381 static void process_nmi(struct kvm_vcpu
*vcpu
)
8386 * x86 is limited to one NMI running, and one NMI pending after it.
8387 * If an NMI is already in progress, limit further NMIs to just one.
8388 * Otherwise, allow two (and we'll inject the first one immediately).
8390 if (kvm_x86_ops
.get_nmi_mask(vcpu
) || vcpu
->arch
.nmi_injected
)
8393 vcpu
->arch
.nmi_pending
+= atomic_xchg(&vcpu
->arch
.nmi_queued
, 0);
8394 vcpu
->arch
.nmi_pending
= min(vcpu
->arch
.nmi_pending
, limit
);
8395 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
8398 static u32
enter_smm_get_segment_flags(struct kvm_segment
*seg
)
8401 flags
|= seg
->g
<< 23;
8402 flags
|= seg
->db
<< 22;
8403 flags
|= seg
->l
<< 21;
8404 flags
|= seg
->avl
<< 20;
8405 flags
|= seg
->present
<< 15;
8406 flags
|= seg
->dpl
<< 13;
8407 flags
|= seg
->s
<< 12;
8408 flags
|= seg
->type
<< 8;
8412 static void enter_smm_save_seg_32(struct kvm_vcpu
*vcpu
, char *buf
, int n
)
8414 struct kvm_segment seg
;
8417 kvm_get_segment(vcpu
, &seg
, n
);
8418 put_smstate(u32
, buf
, 0x7fa8 + n
* 4, seg
.selector
);
8421 offset
= 0x7f84 + n
* 12;
8423 offset
= 0x7f2c + (n
- 3) * 12;
8425 put_smstate(u32
, buf
, offset
+ 8, seg
.base
);
8426 put_smstate(u32
, buf
, offset
+ 4, seg
.limit
);
8427 put_smstate(u32
, buf
, offset
, enter_smm_get_segment_flags(&seg
));
8430 #ifdef CONFIG_X86_64
8431 static void enter_smm_save_seg_64(struct kvm_vcpu
*vcpu
, char *buf
, int n
)
8433 struct kvm_segment seg
;
8437 kvm_get_segment(vcpu
, &seg
, n
);
8438 offset
= 0x7e00 + n
* 16;
8440 flags
= enter_smm_get_segment_flags(&seg
) >> 8;
8441 put_smstate(u16
, buf
, offset
, seg
.selector
);
8442 put_smstate(u16
, buf
, offset
+ 2, flags
);
8443 put_smstate(u32
, buf
, offset
+ 4, seg
.limit
);
8444 put_smstate(u64
, buf
, offset
+ 8, seg
.base
);
8448 static void enter_smm_save_state_32(struct kvm_vcpu
*vcpu
, char *buf
)
8451 struct kvm_segment seg
;
8455 put_smstate(u32
, buf
, 0x7ffc, kvm_read_cr0(vcpu
));
8456 put_smstate(u32
, buf
, 0x7ff8, kvm_read_cr3(vcpu
));
8457 put_smstate(u32
, buf
, 0x7ff4, kvm_get_rflags(vcpu
));
8458 put_smstate(u32
, buf
, 0x7ff0, kvm_rip_read(vcpu
));
8460 for (i
= 0; i
< 8; i
++)
8461 put_smstate(u32
, buf
, 0x7fd0 + i
* 4, kvm_register_read(vcpu
, i
));
8463 kvm_get_dr(vcpu
, 6, &val
);
8464 put_smstate(u32
, buf
, 0x7fcc, (u32
)val
);
8465 kvm_get_dr(vcpu
, 7, &val
);
8466 put_smstate(u32
, buf
, 0x7fc8, (u32
)val
);
8468 kvm_get_segment(vcpu
, &seg
, VCPU_SREG_TR
);
8469 put_smstate(u32
, buf
, 0x7fc4, seg
.selector
);
8470 put_smstate(u32
, buf
, 0x7f64, seg
.base
);
8471 put_smstate(u32
, buf
, 0x7f60, seg
.limit
);
8472 put_smstate(u32
, buf
, 0x7f5c, enter_smm_get_segment_flags(&seg
));
8474 kvm_get_segment(vcpu
, &seg
, VCPU_SREG_LDTR
);
8475 put_smstate(u32
, buf
, 0x7fc0, seg
.selector
);
8476 put_smstate(u32
, buf
, 0x7f80, seg
.base
);
8477 put_smstate(u32
, buf
, 0x7f7c, seg
.limit
);
8478 put_smstate(u32
, buf
, 0x7f78, enter_smm_get_segment_flags(&seg
));
8480 kvm_x86_ops
.get_gdt(vcpu
, &dt
);
8481 put_smstate(u32
, buf
, 0x7f74, dt
.address
);
8482 put_smstate(u32
, buf
, 0x7f70, dt
.size
);
8484 kvm_x86_ops
.get_idt(vcpu
, &dt
);
8485 put_smstate(u32
, buf
, 0x7f58, dt
.address
);
8486 put_smstate(u32
, buf
, 0x7f54, dt
.size
);
8488 for (i
= 0; i
< 6; i
++)
8489 enter_smm_save_seg_32(vcpu
, buf
, i
);
8491 put_smstate(u32
, buf
, 0x7f14, kvm_read_cr4(vcpu
));
8494 put_smstate(u32
, buf
, 0x7efc, 0x00020000);
8495 put_smstate(u32
, buf
, 0x7ef8, vcpu
->arch
.smbase
);
8498 #ifdef CONFIG_X86_64
8499 static void enter_smm_save_state_64(struct kvm_vcpu
*vcpu
, char *buf
)
8502 struct kvm_segment seg
;
8506 for (i
= 0; i
< 16; i
++)
8507 put_smstate(u64
, buf
, 0x7ff8 - i
* 8, kvm_register_read(vcpu
, i
));
8509 put_smstate(u64
, buf
, 0x7f78, kvm_rip_read(vcpu
));
8510 put_smstate(u32
, buf
, 0x7f70, kvm_get_rflags(vcpu
));
8512 kvm_get_dr(vcpu
, 6, &val
);
8513 put_smstate(u64
, buf
, 0x7f68, val
);
8514 kvm_get_dr(vcpu
, 7, &val
);
8515 put_smstate(u64
, buf
, 0x7f60, val
);
8517 put_smstate(u64
, buf
, 0x7f58, kvm_read_cr0(vcpu
));
8518 put_smstate(u64
, buf
, 0x7f50, kvm_read_cr3(vcpu
));
8519 put_smstate(u64
, buf
, 0x7f48, kvm_read_cr4(vcpu
));
8521 put_smstate(u32
, buf
, 0x7f00, vcpu
->arch
.smbase
);
8524 put_smstate(u32
, buf
, 0x7efc, 0x00020064);
8526 put_smstate(u64
, buf
, 0x7ed0, vcpu
->arch
.efer
);
8528 kvm_get_segment(vcpu
, &seg
, VCPU_SREG_TR
);
8529 put_smstate(u16
, buf
, 0x7e90, seg
.selector
);
8530 put_smstate(u16
, buf
, 0x7e92, enter_smm_get_segment_flags(&seg
) >> 8);
8531 put_smstate(u32
, buf
, 0x7e94, seg
.limit
);
8532 put_smstate(u64
, buf
, 0x7e98, seg
.base
);
8534 kvm_x86_ops
.get_idt(vcpu
, &dt
);
8535 put_smstate(u32
, buf
, 0x7e84, dt
.size
);
8536 put_smstate(u64
, buf
, 0x7e88, dt
.address
);
8538 kvm_get_segment(vcpu
, &seg
, VCPU_SREG_LDTR
);
8539 put_smstate(u16
, buf
, 0x7e70, seg
.selector
);
8540 put_smstate(u16
, buf
, 0x7e72, enter_smm_get_segment_flags(&seg
) >> 8);
8541 put_smstate(u32
, buf
, 0x7e74, seg
.limit
);
8542 put_smstate(u64
, buf
, 0x7e78, seg
.base
);
8544 kvm_x86_ops
.get_gdt(vcpu
, &dt
);
8545 put_smstate(u32
, buf
, 0x7e64, dt
.size
);
8546 put_smstate(u64
, buf
, 0x7e68, dt
.address
);
8548 for (i
= 0; i
< 6; i
++)
8549 enter_smm_save_seg_64(vcpu
, buf
, i
);
8553 static void enter_smm(struct kvm_vcpu
*vcpu
)
8555 struct kvm_segment cs
, ds
;
8560 trace_kvm_enter_smm(vcpu
->vcpu_id
, vcpu
->arch
.smbase
, true);
8561 memset(buf
, 0, 512);
8562 #ifdef CONFIG_X86_64
8563 if (guest_cpuid_has(vcpu
, X86_FEATURE_LM
))
8564 enter_smm_save_state_64(vcpu
, buf
);
8567 enter_smm_save_state_32(vcpu
, buf
);
8570 * Give pre_enter_smm() a chance to make ISA-specific changes to the
8571 * vCPU state (e.g. leave guest mode) after we've saved the state into
8572 * the SMM state-save area.
8574 kvm_x86_ops
.pre_enter_smm(vcpu
, buf
);
8576 vcpu
->arch
.hflags
|= HF_SMM_MASK
;
8577 kvm_vcpu_write_guest(vcpu
, vcpu
->arch
.smbase
+ 0xfe00, buf
, sizeof(buf
));
8579 if (kvm_x86_ops
.get_nmi_mask(vcpu
))
8580 vcpu
->arch
.hflags
|= HF_SMM_INSIDE_NMI_MASK
;
8582 kvm_x86_ops
.set_nmi_mask(vcpu
, true);
8584 kvm_set_rflags(vcpu
, X86_EFLAGS_FIXED
);
8585 kvm_rip_write(vcpu
, 0x8000);
8587 cr0
= vcpu
->arch
.cr0
& ~(X86_CR0_PE
| X86_CR0_EM
| X86_CR0_TS
| X86_CR0_PG
);
8588 kvm_x86_ops
.set_cr0(vcpu
, cr0
);
8589 vcpu
->arch
.cr0
= cr0
;
8591 kvm_x86_ops
.set_cr4(vcpu
, 0);
8593 /* Undocumented: IDT limit is set to zero on entry to SMM. */
8594 dt
.address
= dt
.size
= 0;
8595 kvm_x86_ops
.set_idt(vcpu
, &dt
);
8597 __kvm_set_dr(vcpu
, 7, DR7_FIXED_1
);
8599 cs
.selector
= (vcpu
->arch
.smbase
>> 4) & 0xffff;
8600 cs
.base
= vcpu
->arch
.smbase
;
8605 cs
.limit
= ds
.limit
= 0xffffffff;
8606 cs
.type
= ds
.type
= 0x3;
8607 cs
.dpl
= ds
.dpl
= 0;
8612 cs
.avl
= ds
.avl
= 0;
8613 cs
.present
= ds
.present
= 1;
8614 cs
.unusable
= ds
.unusable
= 0;
8615 cs
.padding
= ds
.padding
= 0;
8617 kvm_set_segment(vcpu
, &cs
, VCPU_SREG_CS
);
8618 kvm_set_segment(vcpu
, &ds
, VCPU_SREG_DS
);
8619 kvm_set_segment(vcpu
, &ds
, VCPU_SREG_ES
);
8620 kvm_set_segment(vcpu
, &ds
, VCPU_SREG_FS
);
8621 kvm_set_segment(vcpu
, &ds
, VCPU_SREG_GS
);
8622 kvm_set_segment(vcpu
, &ds
, VCPU_SREG_SS
);
8624 #ifdef CONFIG_X86_64
8625 if (guest_cpuid_has(vcpu
, X86_FEATURE_LM
))
8626 kvm_x86_ops
.set_efer(vcpu
, 0);
8629 kvm_update_cpuid_runtime(vcpu
);
8630 kvm_mmu_reset_context(vcpu
);
8633 static void process_smi(struct kvm_vcpu
*vcpu
)
8635 vcpu
->arch
.smi_pending
= true;
8636 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
8639 void kvm_make_scan_ioapic_request_mask(struct kvm
*kvm
,
8640 unsigned long *vcpu_bitmap
)
8644 zalloc_cpumask_var(&cpus
, GFP_ATOMIC
);
8646 kvm_make_vcpus_request_mask(kvm
, KVM_REQ_SCAN_IOAPIC
,
8647 NULL
, vcpu_bitmap
, cpus
);
8649 free_cpumask_var(cpus
);
8652 void kvm_make_scan_ioapic_request(struct kvm
*kvm
)
8654 kvm_make_all_cpus_request(kvm
, KVM_REQ_SCAN_IOAPIC
);
8657 void kvm_vcpu_update_apicv(struct kvm_vcpu
*vcpu
)
8659 if (!lapic_in_kernel(vcpu
))
8662 vcpu
->arch
.apicv_active
= kvm_apicv_activated(vcpu
->kvm
);
8663 kvm_apic_update_apicv(vcpu
);
8664 kvm_x86_ops
.refresh_apicv_exec_ctrl(vcpu
);
8666 EXPORT_SYMBOL_GPL(kvm_vcpu_update_apicv
);
8669 * NOTE: Do not hold any lock prior to calling this.
8671 * In particular, kvm_request_apicv_update() expects kvm->srcu not to be
8672 * locked, because it calls __x86_set_memory_region() which does
8673 * synchronize_srcu(&kvm->srcu).
8675 void kvm_request_apicv_update(struct kvm
*kvm
, bool activate
, ulong bit
)
8677 struct kvm_vcpu
*except
;
8678 unsigned long old
, new, expected
;
8680 if (!kvm_x86_ops
.check_apicv_inhibit_reasons
||
8681 !kvm_x86_ops
.check_apicv_inhibit_reasons(bit
))
8684 old
= READ_ONCE(kvm
->arch
.apicv_inhibit_reasons
);
8686 expected
= new = old
;
8688 __clear_bit(bit
, &new);
8690 __set_bit(bit
, &new);
8693 old
= cmpxchg(&kvm
->arch
.apicv_inhibit_reasons
, expected
, new);
8694 } while (old
!= expected
);
8699 trace_kvm_apicv_update_request(activate
, bit
);
8700 if (kvm_x86_ops
.pre_update_apicv_exec_ctrl
)
8701 kvm_x86_ops
.pre_update_apicv_exec_ctrl(kvm
, activate
);
8704 * Sending request to update APICV for all other vcpus,
8705 * while update the calling vcpu immediately instead of
8706 * waiting for another #VMEXIT to handle the request.
8708 except
= kvm_get_running_vcpu();
8709 kvm_make_all_cpus_request_except(kvm
, KVM_REQ_APICV_UPDATE
,
8712 kvm_vcpu_update_apicv(except
);
8714 EXPORT_SYMBOL_GPL(kvm_request_apicv_update
);
8716 static void vcpu_scan_ioapic(struct kvm_vcpu
*vcpu
)
8718 if (!kvm_apic_present(vcpu
))
8721 bitmap_zero(vcpu
->arch
.ioapic_handled_vectors
, 256);
8723 if (irqchip_split(vcpu
->kvm
))
8724 kvm_scan_ioapic_routes(vcpu
, vcpu
->arch
.ioapic_handled_vectors
);
8726 if (vcpu
->arch
.apicv_active
)
8727 kvm_x86_ops
.sync_pir_to_irr(vcpu
);
8728 if (ioapic_in_kernel(vcpu
->kvm
))
8729 kvm_ioapic_scan_entry(vcpu
, vcpu
->arch
.ioapic_handled_vectors
);
8732 if (is_guest_mode(vcpu
))
8733 vcpu
->arch
.load_eoi_exitmap_pending
= true;
8735 kvm_make_request(KVM_REQ_LOAD_EOI_EXITMAP
, vcpu
);
8738 static void vcpu_load_eoi_exitmap(struct kvm_vcpu
*vcpu
)
8740 u64 eoi_exit_bitmap
[4];
8742 if (!kvm_apic_hw_enabled(vcpu
->arch
.apic
))
8745 bitmap_or((ulong
*)eoi_exit_bitmap
, vcpu
->arch
.ioapic_handled_vectors
,
8746 vcpu_to_synic(vcpu
)->vec_bitmap
, 256);
8747 kvm_x86_ops
.load_eoi_exitmap(vcpu
, eoi_exit_bitmap
);
8750 void kvm_arch_mmu_notifier_invalidate_range(struct kvm
*kvm
,
8751 unsigned long start
, unsigned long end
)
8753 unsigned long apic_address
;
8756 * The physical address of apic access page is stored in the VMCS.
8757 * Update it when it becomes invalid.
8759 apic_address
= gfn_to_hva(kvm
, APIC_DEFAULT_PHYS_BASE
>> PAGE_SHIFT
);
8760 if (start
<= apic_address
&& apic_address
< end
)
8761 kvm_make_all_cpus_request(kvm
, KVM_REQ_APIC_PAGE_RELOAD
);
8764 void kvm_vcpu_reload_apic_access_page(struct kvm_vcpu
*vcpu
)
8766 if (!lapic_in_kernel(vcpu
))
8769 if (!kvm_x86_ops
.set_apic_access_page_addr
)
8772 kvm_x86_ops
.set_apic_access_page_addr(vcpu
);
8775 void __kvm_request_immediate_exit(struct kvm_vcpu
*vcpu
)
8777 smp_send_reschedule(vcpu
->cpu
);
8779 EXPORT_SYMBOL_GPL(__kvm_request_immediate_exit
);
8782 * Returns 1 to let vcpu_run() continue the guest execution loop without
8783 * exiting to the userspace. Otherwise, the value will be returned to the
8786 static int vcpu_enter_guest(struct kvm_vcpu
*vcpu
)
8790 dm_request_for_irq_injection(vcpu
) &&
8791 kvm_cpu_accept_dm_intr(vcpu
);
8792 fastpath_t exit_fastpath
;
8794 bool req_immediate_exit
= false;
8796 /* Forbid vmenter if vcpu dirty ring is soft-full */
8797 if (unlikely(vcpu
->kvm
->dirty_ring_size
&&
8798 kvm_dirty_ring_soft_full(&vcpu
->dirty_ring
))) {
8799 vcpu
->run
->exit_reason
= KVM_EXIT_DIRTY_RING_FULL
;
8800 trace_kvm_dirty_ring_exit(vcpu
);
8805 if (kvm_request_pending(vcpu
)) {
8806 if (kvm_check_request(KVM_REQ_GET_NESTED_STATE_PAGES
, vcpu
)) {
8807 if (unlikely(!kvm_x86_ops
.nested_ops
->get_nested_state_pages(vcpu
))) {
8812 if (kvm_check_request(KVM_REQ_MMU_RELOAD
, vcpu
))
8813 kvm_mmu_unload(vcpu
);
8814 if (kvm_check_request(KVM_REQ_MIGRATE_TIMER
, vcpu
))
8815 __kvm_migrate_timers(vcpu
);
8816 if (kvm_check_request(KVM_REQ_MASTERCLOCK_UPDATE
, vcpu
))
8817 kvm_gen_update_masterclock(vcpu
->kvm
);
8818 if (kvm_check_request(KVM_REQ_GLOBAL_CLOCK_UPDATE
, vcpu
))
8819 kvm_gen_kvmclock_update(vcpu
);
8820 if (kvm_check_request(KVM_REQ_CLOCK_UPDATE
, vcpu
)) {
8821 r
= kvm_guest_time_update(vcpu
);
8825 if (kvm_check_request(KVM_REQ_MMU_SYNC
, vcpu
))
8826 kvm_mmu_sync_roots(vcpu
);
8827 if (kvm_check_request(KVM_REQ_LOAD_MMU_PGD
, vcpu
))
8828 kvm_mmu_load_pgd(vcpu
);
8829 if (kvm_check_request(KVM_REQ_TLB_FLUSH
, vcpu
)) {
8830 kvm_vcpu_flush_tlb_all(vcpu
);
8832 /* Flushing all ASIDs flushes the current ASID... */
8833 kvm_clear_request(KVM_REQ_TLB_FLUSH_CURRENT
, vcpu
);
8835 if (kvm_check_request(KVM_REQ_TLB_FLUSH_CURRENT
, vcpu
))
8836 kvm_vcpu_flush_tlb_current(vcpu
);
8837 if (kvm_check_request(KVM_REQ_HV_TLB_FLUSH
, vcpu
))
8838 kvm_vcpu_flush_tlb_guest(vcpu
);
8840 if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS
, vcpu
)) {
8841 vcpu
->run
->exit_reason
= KVM_EXIT_TPR_ACCESS
;
8845 if (kvm_check_request(KVM_REQ_TRIPLE_FAULT
, vcpu
)) {
8846 vcpu
->run
->exit_reason
= KVM_EXIT_SHUTDOWN
;
8847 vcpu
->mmio_needed
= 0;
8851 if (kvm_check_request(KVM_REQ_APF_HALT
, vcpu
)) {
8852 /* Page is swapped out. Do synthetic halt */
8853 vcpu
->arch
.apf
.halted
= true;
8857 if (kvm_check_request(KVM_REQ_STEAL_UPDATE
, vcpu
))
8858 record_steal_time(vcpu
);
8859 if (kvm_check_request(KVM_REQ_SMI
, vcpu
))
8861 if (kvm_check_request(KVM_REQ_NMI
, vcpu
))
8863 if (kvm_check_request(KVM_REQ_PMU
, vcpu
))
8864 kvm_pmu_handle_event(vcpu
);
8865 if (kvm_check_request(KVM_REQ_PMI
, vcpu
))
8866 kvm_pmu_deliver_pmi(vcpu
);
8867 if (kvm_check_request(KVM_REQ_IOAPIC_EOI_EXIT
, vcpu
)) {
8868 BUG_ON(vcpu
->arch
.pending_ioapic_eoi
> 255);
8869 if (test_bit(vcpu
->arch
.pending_ioapic_eoi
,
8870 vcpu
->arch
.ioapic_handled_vectors
)) {
8871 vcpu
->run
->exit_reason
= KVM_EXIT_IOAPIC_EOI
;
8872 vcpu
->run
->eoi
.vector
=
8873 vcpu
->arch
.pending_ioapic_eoi
;
8878 if (kvm_check_request(KVM_REQ_SCAN_IOAPIC
, vcpu
))
8879 vcpu_scan_ioapic(vcpu
);
8880 if (kvm_check_request(KVM_REQ_LOAD_EOI_EXITMAP
, vcpu
))
8881 vcpu_load_eoi_exitmap(vcpu
);
8882 if (kvm_check_request(KVM_REQ_APIC_PAGE_RELOAD
, vcpu
))
8883 kvm_vcpu_reload_apic_access_page(vcpu
);
8884 if (kvm_check_request(KVM_REQ_HV_CRASH
, vcpu
)) {
8885 vcpu
->run
->exit_reason
= KVM_EXIT_SYSTEM_EVENT
;
8886 vcpu
->run
->system_event
.type
= KVM_SYSTEM_EVENT_CRASH
;
8890 if (kvm_check_request(KVM_REQ_HV_RESET
, vcpu
)) {
8891 vcpu
->run
->exit_reason
= KVM_EXIT_SYSTEM_EVENT
;
8892 vcpu
->run
->system_event
.type
= KVM_SYSTEM_EVENT_RESET
;
8896 if (kvm_check_request(KVM_REQ_HV_EXIT
, vcpu
)) {
8897 vcpu
->run
->exit_reason
= KVM_EXIT_HYPERV
;
8898 vcpu
->run
->hyperv
= vcpu
->arch
.hyperv
.exit
;
8904 * KVM_REQ_HV_STIMER has to be processed after
8905 * KVM_REQ_CLOCK_UPDATE, because Hyper-V SynIC timers
8906 * depend on the guest clock being up-to-date
8908 if (kvm_check_request(KVM_REQ_HV_STIMER
, vcpu
))
8909 kvm_hv_process_stimers(vcpu
);
8910 if (kvm_check_request(KVM_REQ_APICV_UPDATE
, vcpu
))
8911 kvm_vcpu_update_apicv(vcpu
);
8912 if (kvm_check_request(KVM_REQ_APF_READY
, vcpu
))
8913 kvm_check_async_pf_completion(vcpu
);
8914 if (kvm_check_request(KVM_REQ_MSR_FILTER_CHANGED
, vcpu
))
8915 kvm_x86_ops
.msr_filter_changed(vcpu
);
8918 if (kvm_check_request(KVM_REQ_EVENT
, vcpu
) || req_int_win
) {
8919 ++vcpu
->stat
.req_event
;
8920 kvm_apic_accept_events(vcpu
);
8921 if (vcpu
->arch
.mp_state
== KVM_MP_STATE_INIT_RECEIVED
) {
8926 inject_pending_event(vcpu
, &req_immediate_exit
);
8928 kvm_x86_ops
.enable_irq_window(vcpu
);
8930 if (kvm_lapic_enabled(vcpu
)) {
8931 update_cr8_intercept(vcpu
);
8932 kvm_lapic_sync_to_vapic(vcpu
);
8936 r
= kvm_mmu_reload(vcpu
);
8938 goto cancel_injection
;
8943 kvm_x86_ops
.prepare_guest_switch(vcpu
);
8946 * Disable IRQs before setting IN_GUEST_MODE. Posted interrupt
8947 * IPI are then delayed after guest entry, which ensures that they
8948 * result in virtual interrupt delivery.
8950 local_irq_disable();
8951 vcpu
->mode
= IN_GUEST_MODE
;
8953 srcu_read_unlock(&vcpu
->kvm
->srcu
, vcpu
->srcu_idx
);
8956 * 1) We should set ->mode before checking ->requests. Please see
8957 * the comment in kvm_vcpu_exiting_guest_mode().
8959 * 2) For APICv, we should set ->mode before checking PID.ON. This
8960 * pairs with the memory barrier implicit in pi_test_and_set_on
8961 * (see vmx_deliver_posted_interrupt).
8963 * 3) This also orders the write to mode from any reads to the page
8964 * tables done while the VCPU is running. Please see the comment
8965 * in kvm_flush_remote_tlbs.
8967 smp_mb__after_srcu_read_unlock();
8970 * This handles the case where a posted interrupt was
8971 * notified with kvm_vcpu_kick.
8973 if (kvm_lapic_enabled(vcpu
) && vcpu
->arch
.apicv_active
)
8974 kvm_x86_ops
.sync_pir_to_irr(vcpu
);
8976 if (kvm_vcpu_exit_request(vcpu
)) {
8977 vcpu
->mode
= OUTSIDE_GUEST_MODE
;
8981 vcpu
->srcu_idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
8983 goto cancel_injection
;
8986 if (req_immediate_exit
) {
8987 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
8988 kvm_x86_ops
.request_immediate_exit(vcpu
);
8991 fpregs_assert_state_consistent();
8992 if (test_thread_flag(TIF_NEED_FPU_LOAD
))
8993 switch_fpu_return();
8995 if (unlikely(vcpu
->arch
.switch_db_regs
)) {
8997 set_debugreg(vcpu
->arch
.eff_db
[0], 0);
8998 set_debugreg(vcpu
->arch
.eff_db
[1], 1);
8999 set_debugreg(vcpu
->arch
.eff_db
[2], 2);
9000 set_debugreg(vcpu
->arch
.eff_db
[3], 3);
9001 set_debugreg(vcpu
->arch
.dr6
, 6);
9002 vcpu
->arch
.switch_db_regs
&= ~KVM_DEBUGREG_RELOAD
;
9005 exit_fastpath
= kvm_x86_ops
.run(vcpu
);
9008 * Do this here before restoring debug registers on the host. And
9009 * since we do this before handling the vmexit, a DR access vmexit
9010 * can (a) read the correct value of the debug registers, (b) set
9011 * KVM_DEBUGREG_WONT_EXIT again.
9013 if (unlikely(vcpu
->arch
.switch_db_regs
& KVM_DEBUGREG_WONT_EXIT
)) {
9014 WARN_ON(vcpu
->guest_debug
& KVM_GUESTDBG_USE_HW_BP
);
9015 kvm_x86_ops
.sync_dirty_debug_regs(vcpu
);
9016 kvm_update_dr0123(vcpu
);
9017 kvm_update_dr7(vcpu
);
9018 vcpu
->arch
.switch_db_regs
&= ~KVM_DEBUGREG_RELOAD
;
9022 * If the guest has used debug registers, at least dr7
9023 * will be disabled while returning to the host.
9024 * If we don't have active breakpoints in the host, we don't
9025 * care about the messed up debug address registers. But if
9026 * we have some of them active, restore the old state.
9028 if (hw_breakpoint_active())
9029 hw_breakpoint_restore();
9031 vcpu
->arch
.last_vmentry_cpu
= vcpu
->cpu
;
9032 vcpu
->arch
.last_guest_tsc
= kvm_read_l1_tsc(vcpu
, rdtsc());
9034 vcpu
->mode
= OUTSIDE_GUEST_MODE
;
9037 kvm_x86_ops
.handle_exit_irqoff(vcpu
);
9040 * Consume any pending interrupts, including the possible source of
9041 * VM-Exit on SVM and any ticks that occur between VM-Exit and now.
9042 * An instruction is required after local_irq_enable() to fully unblock
9043 * interrupts on processors that implement an interrupt shadow, the
9044 * stat.exits increment will do nicely.
9046 kvm_before_interrupt(vcpu
);
9049 local_irq_disable();
9050 kvm_after_interrupt(vcpu
);
9052 if (lapic_in_kernel(vcpu
)) {
9053 s64 delta
= vcpu
->arch
.apic
->lapic_timer
.advance_expire_delta
;
9054 if (delta
!= S64_MIN
) {
9055 trace_kvm_wait_lapic_expire(vcpu
->vcpu_id
, delta
);
9056 vcpu
->arch
.apic
->lapic_timer
.advance_expire_delta
= S64_MIN
;
9063 vcpu
->srcu_idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
9066 * Profile KVM exit RIPs:
9068 if (unlikely(prof_on
== KVM_PROFILING
)) {
9069 unsigned long rip
= kvm_rip_read(vcpu
);
9070 profile_hit(KVM_PROFILING
, (void *)rip
);
9073 if (unlikely(vcpu
->arch
.tsc_always_catchup
))
9074 kvm_make_request(KVM_REQ_CLOCK_UPDATE
, vcpu
);
9076 if (vcpu
->arch
.apic_attention
)
9077 kvm_lapic_sync_from_vapic(vcpu
);
9079 r
= kvm_x86_ops
.handle_exit(vcpu
, exit_fastpath
);
9083 if (req_immediate_exit
)
9084 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
9085 kvm_x86_ops
.cancel_injection(vcpu
);
9086 if (unlikely(vcpu
->arch
.apic_attention
))
9087 kvm_lapic_sync_from_vapic(vcpu
);
9092 static inline int vcpu_block(struct kvm
*kvm
, struct kvm_vcpu
*vcpu
)
9094 if (!kvm_arch_vcpu_runnable(vcpu
) &&
9095 (!kvm_x86_ops
.pre_block
|| kvm_x86_ops
.pre_block(vcpu
) == 0)) {
9096 srcu_read_unlock(&kvm
->srcu
, vcpu
->srcu_idx
);
9097 kvm_vcpu_block(vcpu
);
9098 vcpu
->srcu_idx
= srcu_read_lock(&kvm
->srcu
);
9100 if (kvm_x86_ops
.post_block
)
9101 kvm_x86_ops
.post_block(vcpu
);
9103 if (!kvm_check_request(KVM_REQ_UNHALT
, vcpu
))
9107 kvm_apic_accept_events(vcpu
);
9108 switch(vcpu
->arch
.mp_state
) {
9109 case KVM_MP_STATE_HALTED
:
9110 case KVM_MP_STATE_AP_RESET_HOLD
:
9111 vcpu
->arch
.pv
.pv_unhalted
= false;
9112 vcpu
->arch
.mp_state
=
9113 KVM_MP_STATE_RUNNABLE
;
9115 case KVM_MP_STATE_RUNNABLE
:
9116 vcpu
->arch
.apf
.halted
= false;
9118 case KVM_MP_STATE_INIT_RECEIVED
:
9126 static inline bool kvm_vcpu_running(struct kvm_vcpu
*vcpu
)
9128 if (is_guest_mode(vcpu
))
9129 kvm_x86_ops
.nested_ops
->check_events(vcpu
);
9131 return (vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
&&
9132 !vcpu
->arch
.apf
.halted
);
9135 static int vcpu_run(struct kvm_vcpu
*vcpu
)
9138 struct kvm
*kvm
= vcpu
->kvm
;
9140 vcpu
->srcu_idx
= srcu_read_lock(&kvm
->srcu
);
9141 vcpu
->arch
.l1tf_flush_l1d
= true;
9144 if (kvm_vcpu_running(vcpu
)) {
9145 r
= vcpu_enter_guest(vcpu
);
9147 r
= vcpu_block(kvm
, vcpu
);
9153 kvm_clear_request(KVM_REQ_PENDING_TIMER
, vcpu
);
9154 if (kvm_cpu_has_pending_timer(vcpu
))
9155 kvm_inject_pending_timer_irqs(vcpu
);
9157 if (dm_request_for_irq_injection(vcpu
) &&
9158 kvm_vcpu_ready_for_interrupt_injection(vcpu
)) {
9160 vcpu
->run
->exit_reason
= KVM_EXIT_IRQ_WINDOW_OPEN
;
9161 ++vcpu
->stat
.request_irq_exits
;
9165 if (__xfer_to_guest_mode_work_pending()) {
9166 srcu_read_unlock(&kvm
->srcu
, vcpu
->srcu_idx
);
9167 r
= xfer_to_guest_mode_handle_work(vcpu
);
9170 vcpu
->srcu_idx
= srcu_read_lock(&kvm
->srcu
);
9174 srcu_read_unlock(&kvm
->srcu
, vcpu
->srcu_idx
);
9179 static inline int complete_emulated_io(struct kvm_vcpu
*vcpu
)
9183 vcpu
->srcu_idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
9184 r
= kvm_emulate_instruction(vcpu
, EMULTYPE_NO_DECODE
);
9185 srcu_read_unlock(&vcpu
->kvm
->srcu
, vcpu
->srcu_idx
);
9189 static int complete_emulated_pio(struct kvm_vcpu
*vcpu
)
9191 BUG_ON(!vcpu
->arch
.pio
.count
);
9193 return complete_emulated_io(vcpu
);
9197 * Implements the following, as a state machine:
9201 * for each mmio piece in the fragment
9209 * for each mmio piece in the fragment
9214 static int complete_emulated_mmio(struct kvm_vcpu
*vcpu
)
9216 struct kvm_run
*run
= vcpu
->run
;
9217 struct kvm_mmio_fragment
*frag
;
9220 BUG_ON(!vcpu
->mmio_needed
);
9222 /* Complete previous fragment */
9223 frag
= &vcpu
->mmio_fragments
[vcpu
->mmio_cur_fragment
];
9224 len
= min(8u, frag
->len
);
9225 if (!vcpu
->mmio_is_write
)
9226 memcpy(frag
->data
, run
->mmio
.data
, len
);
9228 if (frag
->len
<= 8) {
9229 /* Switch to the next fragment. */
9231 vcpu
->mmio_cur_fragment
++;
9233 /* Go forward to the next mmio piece. */
9239 if (vcpu
->mmio_cur_fragment
>= vcpu
->mmio_nr_fragments
) {
9240 vcpu
->mmio_needed
= 0;
9242 /* FIXME: return into emulator if single-stepping. */
9243 if (vcpu
->mmio_is_write
)
9245 vcpu
->mmio_read_completed
= 1;
9246 return complete_emulated_io(vcpu
);
9249 run
->exit_reason
= KVM_EXIT_MMIO
;
9250 run
->mmio
.phys_addr
= frag
->gpa
;
9251 if (vcpu
->mmio_is_write
)
9252 memcpy(run
->mmio
.data
, frag
->data
, min(8u, frag
->len
));
9253 run
->mmio
.len
= min(8u, frag
->len
);
9254 run
->mmio
.is_write
= vcpu
->mmio_is_write
;
9255 vcpu
->arch
.complete_userspace_io
= complete_emulated_mmio
;
9259 static void kvm_save_current_fpu(struct fpu
*fpu
)
9262 * If the target FPU state is not resident in the CPU registers, just
9263 * memcpy() from current, else save CPU state directly to the target.
9265 if (test_thread_flag(TIF_NEED_FPU_LOAD
))
9266 memcpy(&fpu
->state
, ¤t
->thread
.fpu
.state
,
9267 fpu_kernel_xstate_size
);
9269 copy_fpregs_to_fpstate(fpu
);
9272 /* Swap (qemu) user FPU context for the guest FPU context. */
9273 static void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
)
9277 kvm_save_current_fpu(vcpu
->arch
.user_fpu
);
9280 * Guests with protected state can't have it set by the hypervisor,
9281 * so skip trying to set it.
9283 if (vcpu
->arch
.guest_fpu
)
9284 /* PKRU is separately restored in kvm_x86_ops.run. */
9285 __copy_kernel_to_fpregs(&vcpu
->arch
.guest_fpu
->state
,
9286 ~XFEATURE_MASK_PKRU
);
9288 fpregs_mark_activate();
9294 /* When vcpu_run ends, restore user space FPU context. */
9295 static void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
)
9300 * Guests with protected state can't have it read by the hypervisor,
9301 * so skip trying to save it.
9303 if (vcpu
->arch
.guest_fpu
)
9304 kvm_save_current_fpu(vcpu
->arch
.guest_fpu
);
9306 copy_kernel_to_fpregs(&vcpu
->arch
.user_fpu
->state
);
9308 fpregs_mark_activate();
9311 ++vcpu
->stat
.fpu_reload
;
9315 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
)
9317 struct kvm_run
*kvm_run
= vcpu
->run
;
9321 kvm_sigset_activate(vcpu
);
9322 kvm_load_guest_fpu(vcpu
);
9324 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_UNINITIALIZED
)) {
9325 if (kvm_run
->immediate_exit
) {
9329 kvm_vcpu_block(vcpu
);
9330 kvm_apic_accept_events(vcpu
);
9331 kvm_clear_request(KVM_REQ_UNHALT
, vcpu
);
9333 if (signal_pending(current
)) {
9335 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
9336 ++vcpu
->stat
.signal_exits
;
9341 if (kvm_run
->kvm_valid_regs
& ~KVM_SYNC_X86_VALID_FIELDS
) {
9346 if (kvm_run
->kvm_dirty_regs
) {
9347 r
= sync_regs(vcpu
);
9352 /* re-sync apic's tpr */
9353 if (!lapic_in_kernel(vcpu
)) {
9354 if (kvm_set_cr8(vcpu
, kvm_run
->cr8
) != 0) {
9360 if (unlikely(vcpu
->arch
.complete_userspace_io
)) {
9361 int (*cui
)(struct kvm_vcpu
*) = vcpu
->arch
.complete_userspace_io
;
9362 vcpu
->arch
.complete_userspace_io
= NULL
;
9367 WARN_ON(vcpu
->arch
.pio
.count
|| vcpu
->mmio_needed
);
9369 if (kvm_run
->immediate_exit
)
9375 kvm_put_guest_fpu(vcpu
);
9376 if (kvm_run
->kvm_valid_regs
)
9378 post_kvm_run_save(vcpu
);
9379 kvm_sigset_deactivate(vcpu
);
9385 static void __get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
9387 if (vcpu
->arch
.emulate_regs_need_sync_to_vcpu
) {
9389 * We are here if userspace calls get_regs() in the middle of
9390 * instruction emulation. Registers state needs to be copied
9391 * back from emulation context to vcpu. Userspace shouldn't do
9392 * that usually, but some bad designed PV devices (vmware
9393 * backdoor interface) need this to work
9395 emulator_writeback_register_cache(vcpu
->arch
.emulate_ctxt
);
9396 vcpu
->arch
.emulate_regs_need_sync_to_vcpu
= false;
9398 regs
->rax
= kvm_rax_read(vcpu
);
9399 regs
->rbx
= kvm_rbx_read(vcpu
);
9400 regs
->rcx
= kvm_rcx_read(vcpu
);
9401 regs
->rdx
= kvm_rdx_read(vcpu
);
9402 regs
->rsi
= kvm_rsi_read(vcpu
);
9403 regs
->rdi
= kvm_rdi_read(vcpu
);
9404 regs
->rsp
= kvm_rsp_read(vcpu
);
9405 regs
->rbp
= kvm_rbp_read(vcpu
);
9406 #ifdef CONFIG_X86_64
9407 regs
->r8
= kvm_r8_read(vcpu
);
9408 regs
->r9
= kvm_r9_read(vcpu
);
9409 regs
->r10
= kvm_r10_read(vcpu
);
9410 regs
->r11
= kvm_r11_read(vcpu
);
9411 regs
->r12
= kvm_r12_read(vcpu
);
9412 regs
->r13
= kvm_r13_read(vcpu
);
9413 regs
->r14
= kvm_r14_read(vcpu
);
9414 regs
->r15
= kvm_r15_read(vcpu
);
9417 regs
->rip
= kvm_rip_read(vcpu
);
9418 regs
->rflags
= kvm_get_rflags(vcpu
);
9421 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
9424 __get_regs(vcpu
, regs
);
9429 static void __set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
9431 vcpu
->arch
.emulate_regs_need_sync_from_vcpu
= true;
9432 vcpu
->arch
.emulate_regs_need_sync_to_vcpu
= false;
9434 kvm_rax_write(vcpu
, regs
->rax
);
9435 kvm_rbx_write(vcpu
, regs
->rbx
);
9436 kvm_rcx_write(vcpu
, regs
->rcx
);
9437 kvm_rdx_write(vcpu
, regs
->rdx
);
9438 kvm_rsi_write(vcpu
, regs
->rsi
);
9439 kvm_rdi_write(vcpu
, regs
->rdi
);
9440 kvm_rsp_write(vcpu
, regs
->rsp
);
9441 kvm_rbp_write(vcpu
, regs
->rbp
);
9442 #ifdef CONFIG_X86_64
9443 kvm_r8_write(vcpu
, regs
->r8
);
9444 kvm_r9_write(vcpu
, regs
->r9
);
9445 kvm_r10_write(vcpu
, regs
->r10
);
9446 kvm_r11_write(vcpu
, regs
->r11
);
9447 kvm_r12_write(vcpu
, regs
->r12
);
9448 kvm_r13_write(vcpu
, regs
->r13
);
9449 kvm_r14_write(vcpu
, regs
->r14
);
9450 kvm_r15_write(vcpu
, regs
->r15
);
9453 kvm_rip_write(vcpu
, regs
->rip
);
9454 kvm_set_rflags(vcpu
, regs
->rflags
| X86_EFLAGS_FIXED
);
9456 vcpu
->arch
.exception
.pending
= false;
9458 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
9461 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
9464 __set_regs(vcpu
, regs
);
9469 void kvm_get_cs_db_l_bits(struct kvm_vcpu
*vcpu
, int *db
, int *l
)
9471 struct kvm_segment cs
;
9473 kvm_get_segment(vcpu
, &cs
, VCPU_SREG_CS
);
9477 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits
);
9479 static void __get_sregs(struct kvm_vcpu
*vcpu
, struct kvm_sregs
*sregs
)
9483 if (vcpu
->arch
.guest_state_protected
)
9484 goto skip_protected_regs
;
9486 kvm_get_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
9487 kvm_get_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
9488 kvm_get_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
9489 kvm_get_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
9490 kvm_get_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
9491 kvm_get_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
9493 kvm_get_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
9494 kvm_get_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
9496 kvm_x86_ops
.get_idt(vcpu
, &dt
);
9497 sregs
->idt
.limit
= dt
.size
;
9498 sregs
->idt
.base
= dt
.address
;
9499 kvm_x86_ops
.get_gdt(vcpu
, &dt
);
9500 sregs
->gdt
.limit
= dt
.size
;
9501 sregs
->gdt
.base
= dt
.address
;
9503 sregs
->cr2
= vcpu
->arch
.cr2
;
9504 sregs
->cr3
= kvm_read_cr3(vcpu
);
9506 skip_protected_regs
:
9507 sregs
->cr0
= kvm_read_cr0(vcpu
);
9508 sregs
->cr4
= kvm_read_cr4(vcpu
);
9509 sregs
->cr8
= kvm_get_cr8(vcpu
);
9510 sregs
->efer
= vcpu
->arch
.efer
;
9511 sregs
->apic_base
= kvm_get_apic_base(vcpu
);
9513 memset(sregs
->interrupt_bitmap
, 0, sizeof(sregs
->interrupt_bitmap
));
9515 if (vcpu
->arch
.interrupt
.injected
&& !vcpu
->arch
.interrupt
.soft
)
9516 set_bit(vcpu
->arch
.interrupt
.nr
,
9517 (unsigned long *)sregs
->interrupt_bitmap
);
9520 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
9521 struct kvm_sregs
*sregs
)
9524 __get_sregs(vcpu
, sregs
);
9529 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
9530 struct kvm_mp_state
*mp_state
)
9533 if (kvm_mpx_supported())
9534 kvm_load_guest_fpu(vcpu
);
9536 kvm_apic_accept_events(vcpu
);
9537 if ((vcpu
->arch
.mp_state
== KVM_MP_STATE_HALTED
||
9538 vcpu
->arch
.mp_state
== KVM_MP_STATE_AP_RESET_HOLD
) &&
9539 vcpu
->arch
.pv
.pv_unhalted
)
9540 mp_state
->mp_state
= KVM_MP_STATE_RUNNABLE
;
9542 mp_state
->mp_state
= vcpu
->arch
.mp_state
;
9544 if (kvm_mpx_supported())
9545 kvm_put_guest_fpu(vcpu
);
9550 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
9551 struct kvm_mp_state
*mp_state
)
9557 if (!lapic_in_kernel(vcpu
) &&
9558 mp_state
->mp_state
!= KVM_MP_STATE_RUNNABLE
)
9562 * KVM_MP_STATE_INIT_RECEIVED means the processor is in
9563 * INIT state; latched init should be reported using
9564 * KVM_SET_VCPU_EVENTS, so reject it here.
9566 if ((kvm_vcpu_latch_init(vcpu
) || vcpu
->arch
.smi_pending
) &&
9567 (mp_state
->mp_state
== KVM_MP_STATE_SIPI_RECEIVED
||
9568 mp_state
->mp_state
== KVM_MP_STATE_INIT_RECEIVED
))
9571 if (mp_state
->mp_state
== KVM_MP_STATE_SIPI_RECEIVED
) {
9572 vcpu
->arch
.mp_state
= KVM_MP_STATE_INIT_RECEIVED
;
9573 set_bit(KVM_APIC_SIPI
, &vcpu
->arch
.apic
->pending_events
);
9575 vcpu
->arch
.mp_state
= mp_state
->mp_state
;
9576 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
9584 int kvm_task_switch(struct kvm_vcpu
*vcpu
, u16 tss_selector
, int idt_index
,
9585 int reason
, bool has_error_code
, u32 error_code
)
9587 struct x86_emulate_ctxt
*ctxt
= vcpu
->arch
.emulate_ctxt
;
9590 init_emulate_ctxt(vcpu
);
9592 ret
= emulator_task_switch(ctxt
, tss_selector
, idt_index
, reason
,
9593 has_error_code
, error_code
);
9595 vcpu
->run
->exit_reason
= KVM_EXIT_INTERNAL_ERROR
;
9596 vcpu
->run
->internal
.suberror
= KVM_INTERNAL_ERROR_EMULATION
;
9597 vcpu
->run
->internal
.ndata
= 0;
9601 kvm_rip_write(vcpu
, ctxt
->eip
);
9602 kvm_set_rflags(vcpu
, ctxt
->eflags
);
9605 EXPORT_SYMBOL_GPL(kvm_task_switch
);
9607 static bool kvm_is_valid_sregs(struct kvm_vcpu
*vcpu
, struct kvm_sregs
*sregs
)
9609 if ((sregs
->efer
& EFER_LME
) && (sregs
->cr0
& X86_CR0_PG
)) {
9611 * When EFER.LME and CR0.PG are set, the processor is in
9612 * 64-bit mode (though maybe in a 32-bit code segment).
9613 * CR4.PAE and EFER.LMA must be set.
9615 if (!(sregs
->cr4
& X86_CR4_PAE
) || !(sregs
->efer
& EFER_LMA
))
9617 if (sregs
->cr3
& vcpu
->arch
.cr3_lm_rsvd_bits
)
9621 * Not in 64-bit mode: EFER.LMA is clear and the code
9622 * segment cannot be 64-bit.
9624 if (sregs
->efer
& EFER_LMA
|| sregs
->cs
.l
)
9628 return kvm_is_valid_cr4(vcpu
, sregs
->cr4
);
9631 static int __set_sregs(struct kvm_vcpu
*vcpu
, struct kvm_sregs
*sregs
)
9633 struct msr_data apic_base_msr
;
9634 int mmu_reset_needed
= 0;
9635 int pending_vec
, max_bits
, idx
;
9639 if (!kvm_is_valid_sregs(vcpu
, sregs
))
9642 apic_base_msr
.data
= sregs
->apic_base
;
9643 apic_base_msr
.host_initiated
= true;
9644 if (kvm_set_apic_base(vcpu
, &apic_base_msr
))
9647 if (vcpu
->arch
.guest_state_protected
)
9648 goto skip_protected_regs
;
9650 dt
.size
= sregs
->idt
.limit
;
9651 dt
.address
= sregs
->idt
.base
;
9652 kvm_x86_ops
.set_idt(vcpu
, &dt
);
9653 dt
.size
= sregs
->gdt
.limit
;
9654 dt
.address
= sregs
->gdt
.base
;
9655 kvm_x86_ops
.set_gdt(vcpu
, &dt
);
9657 vcpu
->arch
.cr2
= sregs
->cr2
;
9658 mmu_reset_needed
|= kvm_read_cr3(vcpu
) != sregs
->cr3
;
9659 vcpu
->arch
.cr3
= sregs
->cr3
;
9660 kvm_register_mark_available(vcpu
, VCPU_EXREG_CR3
);
9662 kvm_set_cr8(vcpu
, sregs
->cr8
);
9664 mmu_reset_needed
|= vcpu
->arch
.efer
!= sregs
->efer
;
9665 kvm_x86_ops
.set_efer(vcpu
, sregs
->efer
);
9667 mmu_reset_needed
|= kvm_read_cr0(vcpu
) != sregs
->cr0
;
9668 kvm_x86_ops
.set_cr0(vcpu
, sregs
->cr0
);
9669 vcpu
->arch
.cr0
= sregs
->cr0
;
9671 mmu_reset_needed
|= kvm_read_cr4(vcpu
) != sregs
->cr4
;
9672 kvm_x86_ops
.set_cr4(vcpu
, sregs
->cr4
);
9674 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
9675 if (is_pae_paging(vcpu
)) {
9676 load_pdptrs(vcpu
, vcpu
->arch
.walk_mmu
, kvm_read_cr3(vcpu
));
9677 mmu_reset_needed
= 1;
9679 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
9681 if (mmu_reset_needed
)
9682 kvm_mmu_reset_context(vcpu
);
9684 kvm_set_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
9685 kvm_set_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
9686 kvm_set_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
9687 kvm_set_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
9688 kvm_set_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
9689 kvm_set_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
9691 kvm_set_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
9692 kvm_set_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
9694 update_cr8_intercept(vcpu
);
9696 /* Older userspace won't unhalt the vcpu on reset. */
9697 if (kvm_vcpu_is_bsp(vcpu
) && kvm_rip_read(vcpu
) == 0xfff0 &&
9698 sregs
->cs
.selector
== 0xf000 && sregs
->cs
.base
== 0xffff0000 &&
9700 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
9702 skip_protected_regs
:
9703 max_bits
= KVM_NR_INTERRUPTS
;
9704 pending_vec
= find_first_bit(
9705 (const unsigned long *)sregs
->interrupt_bitmap
, max_bits
);
9706 if (pending_vec
< max_bits
) {
9707 kvm_queue_interrupt(vcpu
, pending_vec
, false);
9708 pr_debug("Set back pending irq %d\n", pending_vec
);
9711 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
9718 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
9719 struct kvm_sregs
*sregs
)
9724 ret
= __set_sregs(vcpu
, sregs
);
9729 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
9730 struct kvm_guest_debug
*dbg
)
9732 unsigned long rflags
;
9735 if (vcpu
->arch
.guest_state_protected
)
9740 if (dbg
->control
& (KVM_GUESTDBG_INJECT_DB
| KVM_GUESTDBG_INJECT_BP
)) {
9742 if (vcpu
->arch
.exception
.pending
)
9744 if (dbg
->control
& KVM_GUESTDBG_INJECT_DB
)
9745 kvm_queue_exception(vcpu
, DB_VECTOR
);
9747 kvm_queue_exception(vcpu
, BP_VECTOR
);
9751 * Read rflags as long as potentially injected trace flags are still
9754 rflags
= kvm_get_rflags(vcpu
);
9756 vcpu
->guest_debug
= dbg
->control
;
9757 if (!(vcpu
->guest_debug
& KVM_GUESTDBG_ENABLE
))
9758 vcpu
->guest_debug
= 0;
9760 if (vcpu
->guest_debug
& KVM_GUESTDBG_USE_HW_BP
) {
9761 for (i
= 0; i
< KVM_NR_DB_REGS
; ++i
)
9762 vcpu
->arch
.eff_db
[i
] = dbg
->arch
.debugreg
[i
];
9763 vcpu
->arch
.guest_debug_dr7
= dbg
->arch
.debugreg
[7];
9765 for (i
= 0; i
< KVM_NR_DB_REGS
; i
++)
9766 vcpu
->arch
.eff_db
[i
] = vcpu
->arch
.db
[i
];
9768 kvm_update_dr7(vcpu
);
9770 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
)
9771 vcpu
->arch
.singlestep_rip
= kvm_rip_read(vcpu
) +
9772 get_segment_base(vcpu
, VCPU_SREG_CS
);
9775 * Trigger an rflags update that will inject or remove the trace
9778 kvm_set_rflags(vcpu
, rflags
);
9780 kvm_x86_ops
.update_exception_bitmap(vcpu
);
9790 * Translate a guest virtual address to a guest physical address.
9792 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
9793 struct kvm_translation
*tr
)
9795 unsigned long vaddr
= tr
->linear_address
;
9801 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
9802 gpa
= kvm_mmu_gva_to_gpa_system(vcpu
, vaddr
, NULL
);
9803 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
9804 tr
->physical_address
= gpa
;
9805 tr
->valid
= gpa
!= UNMAPPED_GVA
;
9813 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
9815 struct fxregs_state
*fxsave
;
9817 if (!vcpu
->arch
.guest_fpu
)
9822 fxsave
= &vcpu
->arch
.guest_fpu
->state
.fxsave
;
9823 memcpy(fpu
->fpr
, fxsave
->st_space
, 128);
9824 fpu
->fcw
= fxsave
->cwd
;
9825 fpu
->fsw
= fxsave
->swd
;
9826 fpu
->ftwx
= fxsave
->twd
;
9827 fpu
->last_opcode
= fxsave
->fop
;
9828 fpu
->last_ip
= fxsave
->rip
;
9829 fpu
->last_dp
= fxsave
->rdp
;
9830 memcpy(fpu
->xmm
, fxsave
->xmm_space
, sizeof(fxsave
->xmm_space
));
9836 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
9838 struct fxregs_state
*fxsave
;
9840 if (!vcpu
->arch
.guest_fpu
)
9845 fxsave
= &vcpu
->arch
.guest_fpu
->state
.fxsave
;
9847 memcpy(fxsave
->st_space
, fpu
->fpr
, 128);
9848 fxsave
->cwd
= fpu
->fcw
;
9849 fxsave
->swd
= fpu
->fsw
;
9850 fxsave
->twd
= fpu
->ftwx
;
9851 fxsave
->fop
= fpu
->last_opcode
;
9852 fxsave
->rip
= fpu
->last_ip
;
9853 fxsave
->rdp
= fpu
->last_dp
;
9854 memcpy(fxsave
->xmm_space
, fpu
->xmm
, sizeof(fxsave
->xmm_space
));
9860 static void store_regs(struct kvm_vcpu
*vcpu
)
9862 BUILD_BUG_ON(sizeof(struct kvm_sync_regs
) > SYNC_REGS_SIZE_BYTES
);
9864 if (vcpu
->run
->kvm_valid_regs
& KVM_SYNC_X86_REGS
)
9865 __get_regs(vcpu
, &vcpu
->run
->s
.regs
.regs
);
9867 if (vcpu
->run
->kvm_valid_regs
& KVM_SYNC_X86_SREGS
)
9868 __get_sregs(vcpu
, &vcpu
->run
->s
.regs
.sregs
);
9870 if (vcpu
->run
->kvm_valid_regs
& KVM_SYNC_X86_EVENTS
)
9871 kvm_vcpu_ioctl_x86_get_vcpu_events(
9872 vcpu
, &vcpu
->run
->s
.regs
.events
);
9875 static int sync_regs(struct kvm_vcpu
*vcpu
)
9877 if (vcpu
->run
->kvm_dirty_regs
& ~KVM_SYNC_X86_VALID_FIELDS
)
9880 if (vcpu
->run
->kvm_dirty_regs
& KVM_SYNC_X86_REGS
) {
9881 __set_regs(vcpu
, &vcpu
->run
->s
.regs
.regs
);
9882 vcpu
->run
->kvm_dirty_regs
&= ~KVM_SYNC_X86_REGS
;
9884 if (vcpu
->run
->kvm_dirty_regs
& KVM_SYNC_X86_SREGS
) {
9885 if (__set_sregs(vcpu
, &vcpu
->run
->s
.regs
.sregs
))
9887 vcpu
->run
->kvm_dirty_regs
&= ~KVM_SYNC_X86_SREGS
;
9889 if (vcpu
->run
->kvm_dirty_regs
& KVM_SYNC_X86_EVENTS
) {
9890 if (kvm_vcpu_ioctl_x86_set_vcpu_events(
9891 vcpu
, &vcpu
->run
->s
.regs
.events
))
9893 vcpu
->run
->kvm_dirty_regs
&= ~KVM_SYNC_X86_EVENTS
;
9899 static void fx_init(struct kvm_vcpu
*vcpu
)
9901 if (!vcpu
->arch
.guest_fpu
)
9904 fpstate_init(&vcpu
->arch
.guest_fpu
->state
);
9905 if (boot_cpu_has(X86_FEATURE_XSAVES
))
9906 vcpu
->arch
.guest_fpu
->state
.xsave
.header
.xcomp_bv
=
9907 host_xcr0
| XSTATE_COMPACTION_ENABLED
;
9910 * Ensure guest xcr0 is valid for loading
9912 vcpu
->arch
.xcr0
= XFEATURE_MASK_FP
;
9914 vcpu
->arch
.cr0
|= X86_CR0_ET
;
9917 void kvm_free_guest_fpu(struct kvm_vcpu
*vcpu
)
9919 if (vcpu
->arch
.guest_fpu
) {
9920 kmem_cache_free(x86_fpu_cache
, vcpu
->arch
.guest_fpu
);
9921 vcpu
->arch
.guest_fpu
= NULL
;
9924 EXPORT_SYMBOL_GPL(kvm_free_guest_fpu
);
9926 int kvm_arch_vcpu_precreate(struct kvm
*kvm
, unsigned int id
)
9928 if (kvm_check_tsc_unstable() && atomic_read(&kvm
->online_vcpus
) != 0)
9929 pr_warn_once("kvm: SMP vm created on host with unstable TSC; "
9930 "guest TSC will not be reliable\n");
9935 int kvm_arch_vcpu_create(struct kvm_vcpu
*vcpu
)
9940 if (!irqchip_in_kernel(vcpu
->kvm
) || kvm_vcpu_is_reset_bsp(vcpu
))
9941 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
9943 vcpu
->arch
.mp_state
= KVM_MP_STATE_UNINITIALIZED
;
9945 kvm_set_tsc_khz(vcpu
, max_tsc_khz
);
9947 r
= kvm_mmu_create(vcpu
);
9951 if (irqchip_in_kernel(vcpu
->kvm
)) {
9952 r
= kvm_create_lapic(vcpu
, lapic_timer_advance_ns
);
9954 goto fail_mmu_destroy
;
9955 if (kvm_apicv_activated(vcpu
->kvm
))
9956 vcpu
->arch
.apicv_active
= true;
9958 static_key_slow_inc(&kvm_no_apic_vcpu
);
9962 page
= alloc_page(GFP_KERNEL_ACCOUNT
| __GFP_ZERO
);
9964 goto fail_free_lapic
;
9965 vcpu
->arch
.pio_data
= page_address(page
);
9967 vcpu
->arch
.mce_banks
= kzalloc(KVM_MAX_MCE_BANKS
* sizeof(u64
) * 4,
9968 GFP_KERNEL_ACCOUNT
);
9969 if (!vcpu
->arch
.mce_banks
)
9970 goto fail_free_pio_data
;
9971 vcpu
->arch
.mcg_cap
= KVM_MAX_MCE_BANKS
;
9973 if (!zalloc_cpumask_var(&vcpu
->arch
.wbinvd_dirty_mask
,
9974 GFP_KERNEL_ACCOUNT
))
9975 goto fail_free_mce_banks
;
9977 if (!alloc_emulate_ctxt(vcpu
))
9978 goto free_wbinvd_dirty_mask
;
9980 vcpu
->arch
.user_fpu
= kmem_cache_zalloc(x86_fpu_cache
,
9981 GFP_KERNEL_ACCOUNT
);
9982 if (!vcpu
->arch
.user_fpu
) {
9983 pr_err("kvm: failed to allocate userspace's fpu\n");
9984 goto free_emulate_ctxt
;
9987 vcpu
->arch
.guest_fpu
= kmem_cache_zalloc(x86_fpu_cache
,
9988 GFP_KERNEL_ACCOUNT
);
9989 if (!vcpu
->arch
.guest_fpu
) {
9990 pr_err("kvm: failed to allocate vcpu's fpu\n");
9995 vcpu
->arch
.maxphyaddr
= cpuid_query_maxphyaddr(vcpu
);
9997 vcpu
->arch
.pat
= MSR_IA32_CR_PAT_DEFAULT
;
9999 kvm_async_pf_hash_reset(vcpu
);
10000 kvm_pmu_init(vcpu
);
10002 vcpu
->arch
.pending_external_vector
= -1;
10003 vcpu
->arch
.preempted_in_kernel
= false;
10005 kvm_hv_vcpu_init(vcpu
);
10007 r
= kvm_x86_ops
.vcpu_create(vcpu
);
10009 goto free_guest_fpu
;
10011 vcpu
->arch
.arch_capabilities
= kvm_get_arch_capabilities();
10012 vcpu
->arch
.msr_platform_info
= MSR_PLATFORM_INFO_CPUID_FAULT
;
10013 kvm_vcpu_mtrr_init(vcpu
);
10015 kvm_vcpu_reset(vcpu
, false);
10016 kvm_init_mmu(vcpu
, false);
10021 kvm_free_guest_fpu(vcpu
);
10023 kmem_cache_free(x86_fpu_cache
, vcpu
->arch
.user_fpu
);
10025 kmem_cache_free(x86_emulator_cache
, vcpu
->arch
.emulate_ctxt
);
10026 free_wbinvd_dirty_mask
:
10027 free_cpumask_var(vcpu
->arch
.wbinvd_dirty_mask
);
10028 fail_free_mce_banks
:
10029 kfree(vcpu
->arch
.mce_banks
);
10030 fail_free_pio_data
:
10031 free_page((unsigned long)vcpu
->arch
.pio_data
);
10033 kvm_free_lapic(vcpu
);
10035 kvm_mmu_destroy(vcpu
);
10039 void kvm_arch_vcpu_postcreate(struct kvm_vcpu
*vcpu
)
10041 struct kvm
*kvm
= vcpu
->kvm
;
10043 kvm_hv_vcpu_postcreate(vcpu
);
10045 if (mutex_lock_killable(&vcpu
->mutex
))
10048 kvm_synchronize_tsc(vcpu
, 0);
10051 /* poll control enabled by default */
10052 vcpu
->arch
.msr_kvm_poll_control
= 1;
10054 mutex_unlock(&vcpu
->mutex
);
10056 if (kvmclock_periodic_sync
&& vcpu
->vcpu_idx
== 0)
10057 schedule_delayed_work(&kvm
->arch
.kvmclock_sync_work
,
10058 KVMCLOCK_SYNC_PERIOD
);
10061 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
)
10063 struct gfn_to_pfn_cache
*cache
= &vcpu
->arch
.st
.cache
;
10066 kvm_release_pfn(cache
->pfn
, cache
->dirty
, cache
);
10068 kvmclock_reset(vcpu
);
10070 kvm_x86_ops
.vcpu_free(vcpu
);
10072 kmem_cache_free(x86_emulator_cache
, vcpu
->arch
.emulate_ctxt
);
10073 free_cpumask_var(vcpu
->arch
.wbinvd_dirty_mask
);
10074 kmem_cache_free(x86_fpu_cache
, vcpu
->arch
.user_fpu
);
10075 kvm_free_guest_fpu(vcpu
);
10077 kvm_hv_vcpu_uninit(vcpu
);
10078 kvm_pmu_destroy(vcpu
);
10079 kfree(vcpu
->arch
.mce_banks
);
10080 kvm_free_lapic(vcpu
);
10081 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
10082 kvm_mmu_destroy(vcpu
);
10083 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
10084 free_page((unsigned long)vcpu
->arch
.pio_data
);
10085 kvfree(vcpu
->arch
.cpuid_entries
);
10086 if (!lapic_in_kernel(vcpu
))
10087 static_key_slow_dec(&kvm_no_apic_vcpu
);
10090 void kvm_vcpu_reset(struct kvm_vcpu
*vcpu
, bool init_event
)
10092 kvm_lapic_reset(vcpu
, init_event
);
10094 vcpu
->arch
.hflags
= 0;
10096 vcpu
->arch
.smi_pending
= 0;
10097 vcpu
->arch
.smi_count
= 0;
10098 atomic_set(&vcpu
->arch
.nmi_queued
, 0);
10099 vcpu
->arch
.nmi_pending
= 0;
10100 vcpu
->arch
.nmi_injected
= false;
10101 kvm_clear_interrupt_queue(vcpu
);
10102 kvm_clear_exception_queue(vcpu
);
10104 memset(vcpu
->arch
.db
, 0, sizeof(vcpu
->arch
.db
));
10105 kvm_update_dr0123(vcpu
);
10106 vcpu
->arch
.dr6
= DR6_INIT
;
10107 vcpu
->arch
.dr7
= DR7_FIXED_1
;
10108 kvm_update_dr7(vcpu
);
10110 vcpu
->arch
.cr2
= 0;
10112 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
10113 vcpu
->arch
.apf
.msr_en_val
= 0;
10114 vcpu
->arch
.apf
.msr_int_val
= 0;
10115 vcpu
->arch
.st
.msr_val
= 0;
10117 kvmclock_reset(vcpu
);
10119 kvm_clear_async_pf_completion_queue(vcpu
);
10120 kvm_async_pf_hash_reset(vcpu
);
10121 vcpu
->arch
.apf
.halted
= false;
10123 if (vcpu
->arch
.guest_fpu
&& kvm_mpx_supported()) {
10124 void *mpx_state_buffer
;
10127 * To avoid have the INIT path from kvm_apic_has_events() that be
10128 * called with loaded FPU and does not let userspace fix the state.
10131 kvm_put_guest_fpu(vcpu
);
10132 mpx_state_buffer
= get_xsave_addr(&vcpu
->arch
.guest_fpu
->state
.xsave
,
10134 if (mpx_state_buffer
)
10135 memset(mpx_state_buffer
, 0, sizeof(struct mpx_bndreg_state
));
10136 mpx_state_buffer
= get_xsave_addr(&vcpu
->arch
.guest_fpu
->state
.xsave
,
10138 if (mpx_state_buffer
)
10139 memset(mpx_state_buffer
, 0, sizeof(struct mpx_bndcsr
));
10141 kvm_load_guest_fpu(vcpu
);
10145 kvm_pmu_reset(vcpu
);
10146 vcpu
->arch
.smbase
= 0x30000;
10148 vcpu
->arch
.msr_misc_features_enables
= 0;
10150 vcpu
->arch
.xcr0
= XFEATURE_MASK_FP
;
10153 memset(vcpu
->arch
.regs
, 0, sizeof(vcpu
->arch
.regs
));
10154 vcpu
->arch
.regs_avail
= ~0;
10155 vcpu
->arch
.regs_dirty
= ~0;
10157 vcpu
->arch
.ia32_xss
= 0;
10159 kvm_x86_ops
.vcpu_reset(vcpu
, init_event
);
10162 void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu
*vcpu
, u8 vector
)
10164 struct kvm_segment cs
;
10166 kvm_get_segment(vcpu
, &cs
, VCPU_SREG_CS
);
10167 cs
.selector
= vector
<< 8;
10168 cs
.base
= vector
<< 12;
10169 kvm_set_segment(vcpu
, &cs
, VCPU_SREG_CS
);
10170 kvm_rip_write(vcpu
, 0);
10172 EXPORT_SYMBOL_GPL(kvm_vcpu_deliver_sipi_vector
);
10174 int kvm_arch_hardware_enable(void)
10177 struct kvm_vcpu
*vcpu
;
10182 bool stable
, backwards_tsc
= false;
10184 kvm_user_return_msr_cpu_online();
10185 ret
= kvm_x86_ops
.hardware_enable();
10189 local_tsc
= rdtsc();
10190 stable
= !kvm_check_tsc_unstable();
10191 list_for_each_entry(kvm
, &vm_list
, vm_list
) {
10192 kvm_for_each_vcpu(i
, vcpu
, kvm
) {
10193 if (!stable
&& vcpu
->cpu
== smp_processor_id())
10194 kvm_make_request(KVM_REQ_CLOCK_UPDATE
, vcpu
);
10195 if (stable
&& vcpu
->arch
.last_host_tsc
> local_tsc
) {
10196 backwards_tsc
= true;
10197 if (vcpu
->arch
.last_host_tsc
> max_tsc
)
10198 max_tsc
= vcpu
->arch
.last_host_tsc
;
10204 * Sometimes, even reliable TSCs go backwards. This happens on
10205 * platforms that reset TSC during suspend or hibernate actions, but
10206 * maintain synchronization. We must compensate. Fortunately, we can
10207 * detect that condition here, which happens early in CPU bringup,
10208 * before any KVM threads can be running. Unfortunately, we can't
10209 * bring the TSCs fully up to date with real time, as we aren't yet far
10210 * enough into CPU bringup that we know how much real time has actually
10211 * elapsed; our helper function, ktime_get_boottime_ns() will be using boot
10212 * variables that haven't been updated yet.
10214 * So we simply find the maximum observed TSC above, then record the
10215 * adjustment to TSC in each VCPU. When the VCPU later gets loaded,
10216 * the adjustment will be applied. Note that we accumulate
10217 * adjustments, in case multiple suspend cycles happen before some VCPU
10218 * gets a chance to run again. In the event that no KVM threads get a
10219 * chance to run, we will miss the entire elapsed period, as we'll have
10220 * reset last_host_tsc, so VCPUs will not have the TSC adjusted and may
10221 * loose cycle time. This isn't too big a deal, since the loss will be
10222 * uniform across all VCPUs (not to mention the scenario is extremely
10223 * unlikely). It is possible that a second hibernate recovery happens
10224 * much faster than a first, causing the observed TSC here to be
10225 * smaller; this would require additional padding adjustment, which is
10226 * why we set last_host_tsc to the local tsc observed here.
10228 * N.B. - this code below runs only on platforms with reliable TSC,
10229 * as that is the only way backwards_tsc is set above. Also note
10230 * that this runs for ALL vcpus, which is not a bug; all VCPUs should
10231 * have the same delta_cyc adjustment applied if backwards_tsc
10232 * is detected. Note further, this adjustment is only done once,
10233 * as we reset last_host_tsc on all VCPUs to stop this from being
10234 * called multiple times (one for each physical CPU bringup).
10236 * Platforms with unreliable TSCs don't have to deal with this, they
10237 * will be compensated by the logic in vcpu_load, which sets the TSC to
10238 * catchup mode. This will catchup all VCPUs to real time, but cannot
10239 * guarantee that they stay in perfect synchronization.
10241 if (backwards_tsc
) {
10242 u64 delta_cyc
= max_tsc
- local_tsc
;
10243 list_for_each_entry(kvm
, &vm_list
, vm_list
) {
10244 kvm
->arch
.backwards_tsc_observed
= true;
10245 kvm_for_each_vcpu(i
, vcpu
, kvm
) {
10246 vcpu
->arch
.tsc_offset_adjustment
+= delta_cyc
;
10247 vcpu
->arch
.last_host_tsc
= local_tsc
;
10248 kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE
, vcpu
);
10252 * We have to disable TSC offset matching.. if you were
10253 * booting a VM while issuing an S4 host suspend....
10254 * you may have some problem. Solving this issue is
10255 * left as an exercise to the reader.
10257 kvm
->arch
.last_tsc_nsec
= 0;
10258 kvm
->arch
.last_tsc_write
= 0;
10265 void kvm_arch_hardware_disable(void)
10267 kvm_x86_ops
.hardware_disable();
10268 drop_user_return_notifiers();
10271 int kvm_arch_hardware_setup(void *opaque
)
10273 struct kvm_x86_init_ops
*ops
= opaque
;
10276 rdmsrl_safe(MSR_EFER
, &host_efer
);
10278 if (boot_cpu_has(X86_FEATURE_XSAVES
))
10279 rdmsrl(MSR_IA32_XSS
, host_xss
);
10281 r
= ops
->hardware_setup();
10285 memcpy(&kvm_x86_ops
, ops
->runtime_ops
, sizeof(kvm_x86_ops
));
10287 if (!kvm_cpu_cap_has(X86_FEATURE_XSAVES
))
10290 #define __kvm_cpu_cap_has(UNUSED_, f) kvm_cpu_cap_has(f)
10291 cr4_reserved_bits
= __cr4_reserved_bits(__kvm_cpu_cap_has
, UNUSED_
);
10292 #undef __kvm_cpu_cap_has
10294 if (kvm_has_tsc_control
) {
10296 * Make sure the user can only configure tsc_khz values that
10297 * fit into a signed integer.
10298 * A min value is not calculated because it will always
10299 * be 1 on all machines.
10301 u64 max
= min(0x7fffffffULL
,
10302 __scale_tsc(kvm_max_tsc_scaling_ratio
, tsc_khz
));
10303 kvm_max_guest_tsc_khz
= max
;
10305 kvm_default_tsc_scaling_ratio
= 1ULL << kvm_tsc_scaling_ratio_frac_bits
;
10308 kvm_init_msr_list();
10312 void kvm_arch_hardware_unsetup(void)
10314 kvm_x86_ops
.hardware_unsetup();
10317 int kvm_arch_check_processor_compat(void *opaque
)
10319 struct cpuinfo_x86
*c
= &cpu_data(smp_processor_id());
10320 struct kvm_x86_init_ops
*ops
= opaque
;
10322 WARN_ON(!irqs_disabled());
10324 if (__cr4_reserved_bits(cpu_has
, c
) !=
10325 __cr4_reserved_bits(cpu_has
, &boot_cpu_data
))
10328 return ops
->check_processor_compatibility();
10331 bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu
*vcpu
)
10333 return vcpu
->kvm
->arch
.bsp_vcpu_id
== vcpu
->vcpu_id
;
10335 EXPORT_SYMBOL_GPL(kvm_vcpu_is_reset_bsp
);
10337 bool kvm_vcpu_is_bsp(struct kvm_vcpu
*vcpu
)
10339 return (vcpu
->arch
.apic_base
& MSR_IA32_APICBASE_BSP
) != 0;
10342 struct static_key kvm_no_apic_vcpu __read_mostly
;
10343 EXPORT_SYMBOL_GPL(kvm_no_apic_vcpu
);
10345 void kvm_arch_sched_in(struct kvm_vcpu
*vcpu
, int cpu
)
10347 struct kvm_pmu
*pmu
= vcpu_to_pmu(vcpu
);
10349 vcpu
->arch
.l1tf_flush_l1d
= true;
10350 if (pmu
->version
&& unlikely(pmu
->event_count
)) {
10351 pmu
->need_cleanup
= true;
10352 kvm_make_request(KVM_REQ_PMU
, vcpu
);
10354 kvm_x86_ops
.sched_in(vcpu
, cpu
);
10357 void kvm_arch_free_vm(struct kvm
*kvm
)
10359 kfree(kvm
->arch
.hyperv
.hv_pa_pg
);
10364 int kvm_arch_init_vm(struct kvm
*kvm
, unsigned long type
)
10369 INIT_HLIST_HEAD(&kvm
->arch
.mask_notifier_list
);
10370 INIT_LIST_HEAD(&kvm
->arch
.active_mmu_pages
);
10371 INIT_LIST_HEAD(&kvm
->arch
.zapped_obsolete_pages
);
10372 INIT_LIST_HEAD(&kvm
->arch
.lpage_disallowed_mmu_pages
);
10373 INIT_LIST_HEAD(&kvm
->arch
.assigned_dev_head
);
10374 atomic_set(&kvm
->arch
.noncoherent_dma_count
, 0);
10376 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
10377 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID
, &kvm
->arch
.irq_sources_bitmap
);
10378 /* Reserve bit 1 of irq_sources_bitmap for irqfd-resampler */
10379 set_bit(KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID
,
10380 &kvm
->arch
.irq_sources_bitmap
);
10382 raw_spin_lock_init(&kvm
->arch
.tsc_write_lock
);
10383 mutex_init(&kvm
->arch
.apic_map_lock
);
10384 spin_lock_init(&kvm
->arch
.pvclock_gtod_sync_lock
);
10386 kvm
->arch
.kvmclock_offset
= -get_kvmclock_base_ns();
10387 pvclock_update_vm_gtod_copy(kvm
);
10389 kvm
->arch
.guest_can_read_msr_platform_info
= true;
10391 INIT_DELAYED_WORK(&kvm
->arch
.kvmclock_update_work
, kvmclock_update_fn
);
10392 INIT_DELAYED_WORK(&kvm
->arch
.kvmclock_sync_work
, kvmclock_sync_fn
);
10394 kvm_hv_init_vm(kvm
);
10395 kvm_page_track_init(kvm
);
10396 kvm_mmu_init_vm(kvm
);
10398 return kvm_x86_ops
.vm_init(kvm
);
10401 int kvm_arch_post_init_vm(struct kvm
*kvm
)
10403 return kvm_mmu_post_init_vm(kvm
);
10406 static void kvm_unload_vcpu_mmu(struct kvm_vcpu
*vcpu
)
10409 kvm_mmu_unload(vcpu
);
10413 static void kvm_free_vcpus(struct kvm
*kvm
)
10416 struct kvm_vcpu
*vcpu
;
10419 * Unpin any mmu pages first.
10421 kvm_for_each_vcpu(i
, vcpu
, kvm
) {
10422 kvm_clear_async_pf_completion_queue(vcpu
);
10423 kvm_unload_vcpu_mmu(vcpu
);
10425 kvm_for_each_vcpu(i
, vcpu
, kvm
)
10426 kvm_vcpu_destroy(vcpu
);
10428 mutex_lock(&kvm
->lock
);
10429 for (i
= 0; i
< atomic_read(&kvm
->online_vcpus
); i
++)
10430 kvm
->vcpus
[i
] = NULL
;
10432 atomic_set(&kvm
->online_vcpus
, 0);
10433 mutex_unlock(&kvm
->lock
);
10436 void kvm_arch_sync_events(struct kvm
*kvm
)
10438 cancel_delayed_work_sync(&kvm
->arch
.kvmclock_sync_work
);
10439 cancel_delayed_work_sync(&kvm
->arch
.kvmclock_update_work
);
10443 #define ERR_PTR_USR(e) ((void __user *)ERR_PTR(e))
10446 * __x86_set_memory_region: Setup KVM internal memory slot
10448 * @kvm: the kvm pointer to the VM.
10449 * @id: the slot ID to setup.
10450 * @gpa: the GPA to install the slot (unused when @size == 0).
10451 * @size: the size of the slot. Set to zero to uninstall a slot.
10453 * This function helps to setup a KVM internal memory slot. Specify
10454 * @size > 0 to install a new slot, while @size == 0 to uninstall a
10455 * slot. The return code can be one of the following:
10457 * HVA: on success (uninstall will return a bogus HVA)
10460 * The caller should always use IS_ERR() to check the return value
10461 * before use. Note, the KVM internal memory slots are guaranteed to
10462 * remain valid and unchanged until the VM is destroyed, i.e., the
10463 * GPA->HVA translation will not change. However, the HVA is a user
10464 * address, i.e. its accessibility is not guaranteed, and must be
10465 * accessed via __copy_{to,from}_user().
10467 void __user
* __x86_set_memory_region(struct kvm
*kvm
, int id
, gpa_t gpa
,
10471 unsigned long hva
, old_npages
;
10472 struct kvm_memslots
*slots
= kvm_memslots(kvm
);
10473 struct kvm_memory_slot
*slot
;
10475 /* Called with kvm->slots_lock held. */
10476 if (WARN_ON(id
>= KVM_MEM_SLOTS_NUM
))
10477 return ERR_PTR_USR(-EINVAL
);
10479 slot
= id_to_memslot(slots
, id
);
10481 if (slot
&& slot
->npages
)
10482 return ERR_PTR_USR(-EEXIST
);
10485 * MAP_SHARED to prevent internal slot pages from being moved
10488 hva
= vm_mmap(NULL
, 0, size
, PROT_READ
| PROT_WRITE
,
10489 MAP_SHARED
| MAP_ANONYMOUS
, 0);
10490 if (IS_ERR((void *)hva
))
10491 return (void __user
*)hva
;
10493 if (!slot
|| !slot
->npages
)
10496 old_npages
= slot
->npages
;
10497 hva
= slot
->userspace_addr
;
10500 for (i
= 0; i
< KVM_ADDRESS_SPACE_NUM
; i
++) {
10501 struct kvm_userspace_memory_region m
;
10503 m
.slot
= id
| (i
<< 16);
10505 m
.guest_phys_addr
= gpa
;
10506 m
.userspace_addr
= hva
;
10507 m
.memory_size
= size
;
10508 r
= __kvm_set_memory_region(kvm
, &m
);
10510 return ERR_PTR_USR(r
);
10514 vm_munmap(hva
, old_npages
* PAGE_SIZE
);
10516 return (void __user
*)hva
;
10518 EXPORT_SYMBOL_GPL(__x86_set_memory_region
);
10520 void kvm_arch_pre_destroy_vm(struct kvm
*kvm
)
10522 kvm_mmu_pre_destroy_vm(kvm
);
10525 void kvm_arch_destroy_vm(struct kvm
*kvm
)
10529 if (current
->mm
== kvm
->mm
) {
10531 * Free memory regions allocated on behalf of userspace,
10532 * unless the the memory map has changed due to process exit
10535 mutex_lock(&kvm
->slots_lock
);
10536 __x86_set_memory_region(kvm
, APIC_ACCESS_PAGE_PRIVATE_MEMSLOT
,
10538 __x86_set_memory_region(kvm
, IDENTITY_PAGETABLE_PRIVATE_MEMSLOT
,
10540 __x86_set_memory_region(kvm
, TSS_PRIVATE_MEMSLOT
, 0, 0);
10541 mutex_unlock(&kvm
->slots_lock
);
10543 if (kvm_x86_ops
.vm_destroy
)
10544 kvm_x86_ops
.vm_destroy(kvm
);
10545 for (i
= 0; i
< kvm
->arch
.msr_filter
.count
; i
++)
10546 kfree(kvm
->arch
.msr_filter
.ranges
[i
].bitmap
);
10547 kvm_pic_destroy(kvm
);
10548 kvm_ioapic_destroy(kvm
);
10549 kvm_free_vcpus(kvm
);
10550 kvfree(rcu_dereference_check(kvm
->arch
.apic_map
, 1));
10551 kfree(srcu_dereference_check(kvm
->arch
.pmu_event_filter
, &kvm
->srcu
, 1));
10552 kvm_mmu_uninit_vm(kvm
);
10553 kvm_page_track_cleanup(kvm
);
10554 kvm_hv_destroy_vm(kvm
);
10557 void kvm_arch_free_memslot(struct kvm
*kvm
, struct kvm_memory_slot
*slot
)
10561 for (i
= 0; i
< KVM_NR_PAGE_SIZES
; ++i
) {
10562 kvfree(slot
->arch
.rmap
[i
]);
10563 slot
->arch
.rmap
[i
] = NULL
;
10568 kvfree(slot
->arch
.lpage_info
[i
- 1]);
10569 slot
->arch
.lpage_info
[i
- 1] = NULL
;
10572 kvm_page_track_free_memslot(slot
);
10575 static int kvm_alloc_memslot_metadata(struct kvm_memory_slot
*slot
,
10576 unsigned long npages
)
10581 * Clear out the previous array pointers for the KVM_MR_MOVE case. The
10582 * old arrays will be freed by __kvm_set_memory_region() if installing
10583 * the new memslot is successful.
10585 memset(&slot
->arch
, 0, sizeof(slot
->arch
));
10587 for (i
= 0; i
< KVM_NR_PAGE_SIZES
; ++i
) {
10588 struct kvm_lpage_info
*linfo
;
10589 unsigned long ugfn
;
10593 lpages
= gfn_to_index(slot
->base_gfn
+ npages
- 1,
10594 slot
->base_gfn
, level
) + 1;
10596 slot
->arch
.rmap
[i
] =
10597 kvcalloc(lpages
, sizeof(*slot
->arch
.rmap
[i
]),
10598 GFP_KERNEL_ACCOUNT
);
10599 if (!slot
->arch
.rmap
[i
])
10604 linfo
= kvcalloc(lpages
, sizeof(*linfo
), GFP_KERNEL_ACCOUNT
);
10608 slot
->arch
.lpage_info
[i
- 1] = linfo
;
10610 if (slot
->base_gfn
& (KVM_PAGES_PER_HPAGE(level
) - 1))
10611 linfo
[0].disallow_lpage
= 1;
10612 if ((slot
->base_gfn
+ npages
) & (KVM_PAGES_PER_HPAGE(level
) - 1))
10613 linfo
[lpages
- 1].disallow_lpage
= 1;
10614 ugfn
= slot
->userspace_addr
>> PAGE_SHIFT
;
10616 * If the gfn and userspace address are not aligned wrt each
10617 * other, disable large page support for this slot.
10619 if ((slot
->base_gfn
^ ugfn
) & (KVM_PAGES_PER_HPAGE(level
) - 1)) {
10622 for (j
= 0; j
< lpages
; ++j
)
10623 linfo
[j
].disallow_lpage
= 1;
10627 if (kvm_page_track_create_memslot(slot
, npages
))
10633 for (i
= 0; i
< KVM_NR_PAGE_SIZES
; ++i
) {
10634 kvfree(slot
->arch
.rmap
[i
]);
10635 slot
->arch
.rmap
[i
] = NULL
;
10639 kvfree(slot
->arch
.lpage_info
[i
- 1]);
10640 slot
->arch
.lpage_info
[i
- 1] = NULL
;
10645 void kvm_arch_memslots_updated(struct kvm
*kvm
, u64 gen
)
10647 struct kvm_vcpu
*vcpu
;
10651 * memslots->generation has been incremented.
10652 * mmio generation may have reached its maximum value.
10654 kvm_mmu_invalidate_mmio_sptes(kvm
, gen
);
10656 /* Force re-initialization of steal_time cache */
10657 kvm_for_each_vcpu(i
, vcpu
, kvm
)
10658 kvm_vcpu_kick(vcpu
);
10661 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
10662 struct kvm_memory_slot
*memslot
,
10663 const struct kvm_userspace_memory_region
*mem
,
10664 enum kvm_mr_change change
)
10666 if (change
== KVM_MR_CREATE
|| change
== KVM_MR_MOVE
)
10667 return kvm_alloc_memslot_metadata(memslot
,
10668 mem
->memory_size
>> PAGE_SHIFT
);
10672 static void kvm_mmu_slot_apply_flags(struct kvm
*kvm
,
10673 struct kvm_memory_slot
*old
,
10674 struct kvm_memory_slot
*new,
10675 enum kvm_mr_change change
)
10678 * Nothing to do for RO slots or CREATE/MOVE/DELETE of a slot.
10679 * See comments below.
10681 if ((change
!= KVM_MR_FLAGS_ONLY
) || (new->flags
& KVM_MEM_READONLY
))
10685 * Dirty logging tracks sptes in 4k granularity, meaning that large
10686 * sptes have to be split. If live migration is successful, the guest
10687 * in the source machine will be destroyed and large sptes will be
10688 * created in the destination. However, if the guest continues to run
10689 * in the source machine (for example if live migration fails), small
10690 * sptes will remain around and cause bad performance.
10692 * Scan sptes if dirty logging has been stopped, dropping those
10693 * which can be collapsed into a single large-page spte. Later
10694 * page faults will create the large-page sptes.
10696 * There is no need to do this in any of the following cases:
10697 * CREATE: No dirty mappings will already exist.
10698 * MOVE/DELETE: The old mappings will already have been cleaned up by
10699 * kvm_arch_flush_shadow_memslot()
10701 if ((old
->flags
& KVM_MEM_LOG_DIRTY_PAGES
) &&
10702 !(new->flags
& KVM_MEM_LOG_DIRTY_PAGES
))
10703 kvm_mmu_zap_collapsible_sptes(kvm
, new);
10706 * Enable or disable dirty logging for the slot.
10708 * For KVM_MR_DELETE and KVM_MR_MOVE, the shadow pages of the old
10709 * slot have been zapped so no dirty logging updates are needed for
10711 * For KVM_MR_CREATE and KVM_MR_MOVE, once the new slot is visible
10712 * any mappings that might be created in it will consume the
10713 * properties of the new slot and do not need to be updated here.
10715 * When PML is enabled, the kvm_x86_ops dirty logging hooks are
10716 * called to enable/disable dirty logging.
10718 * When disabling dirty logging with PML enabled, the D-bit is set
10719 * for sptes in the slot in order to prevent unnecessary GPA
10720 * logging in the PML buffer (and potential PML buffer full VMEXIT).
10721 * This guarantees leaving PML enabled for the guest's lifetime
10722 * won't have any additional overhead from PML when the guest is
10723 * running with dirty logging disabled.
10725 * When enabling dirty logging, large sptes are write-protected
10726 * so they can be split on first write. New large sptes cannot
10727 * be created for this slot until the end of the logging.
10728 * See the comments in fast_page_fault().
10729 * For small sptes, nothing is done if the dirty log is in the
10730 * initial-all-set state. Otherwise, depending on whether pml
10731 * is enabled the D-bit or the W-bit will be cleared.
10733 if (new->flags
& KVM_MEM_LOG_DIRTY_PAGES
) {
10734 if (kvm_x86_ops
.slot_enable_log_dirty
) {
10735 kvm_x86_ops
.slot_enable_log_dirty(kvm
, new);
10738 kvm_dirty_log_manual_protect_and_init_set(kvm
) ?
10739 PG_LEVEL_2M
: PG_LEVEL_4K
;
10742 * If we're with initial-all-set, we don't need
10743 * to write protect any small page because
10744 * they're reported as dirty already. However
10745 * we still need to write-protect huge pages
10746 * so that the page split can happen lazily on
10747 * the first write to the huge page.
10749 kvm_mmu_slot_remove_write_access(kvm
, new, level
);
10752 if (kvm_x86_ops
.slot_disable_log_dirty
)
10753 kvm_x86_ops
.slot_disable_log_dirty(kvm
, new);
10757 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
10758 const struct kvm_userspace_memory_region
*mem
,
10759 struct kvm_memory_slot
*old
,
10760 const struct kvm_memory_slot
*new,
10761 enum kvm_mr_change change
)
10763 if (!kvm
->arch
.n_requested_mmu_pages
)
10764 kvm_mmu_change_mmu_pages(kvm
,
10765 kvm_mmu_calculate_default_mmu_pages(kvm
));
10768 * FIXME: const-ify all uses of struct kvm_memory_slot.
10770 kvm_mmu_slot_apply_flags(kvm
, old
, (struct kvm_memory_slot
*) new, change
);
10772 /* Free the arrays associated with the old memslot. */
10773 if (change
== KVM_MR_MOVE
)
10774 kvm_arch_free_memslot(kvm
, old
);
10777 void kvm_arch_flush_shadow_all(struct kvm
*kvm
)
10779 kvm_mmu_zap_all(kvm
);
10782 void kvm_arch_flush_shadow_memslot(struct kvm
*kvm
,
10783 struct kvm_memory_slot
*slot
)
10785 kvm_page_track_flush_slot(kvm
, slot
);
10788 static inline bool kvm_guest_apic_has_interrupt(struct kvm_vcpu
*vcpu
)
10790 return (is_guest_mode(vcpu
) &&
10791 kvm_x86_ops
.guest_apic_has_interrupt
&&
10792 kvm_x86_ops
.guest_apic_has_interrupt(vcpu
));
10795 static inline bool kvm_vcpu_has_events(struct kvm_vcpu
*vcpu
)
10797 if (!list_empty_careful(&vcpu
->async_pf
.done
))
10800 if (kvm_apic_has_events(vcpu
))
10803 if (vcpu
->arch
.pv
.pv_unhalted
)
10806 if (vcpu
->arch
.exception
.pending
)
10809 if (kvm_test_request(KVM_REQ_NMI
, vcpu
) ||
10810 (vcpu
->arch
.nmi_pending
&&
10811 kvm_x86_ops
.nmi_allowed(vcpu
, false)))
10814 if (kvm_test_request(KVM_REQ_SMI
, vcpu
) ||
10815 (vcpu
->arch
.smi_pending
&&
10816 kvm_x86_ops
.smi_allowed(vcpu
, false)))
10819 if (kvm_arch_interrupt_allowed(vcpu
) &&
10820 (kvm_cpu_has_interrupt(vcpu
) ||
10821 kvm_guest_apic_has_interrupt(vcpu
)))
10824 if (kvm_hv_has_stimer_pending(vcpu
))
10827 if (is_guest_mode(vcpu
) &&
10828 kvm_x86_ops
.nested_ops
->hv_timer_pending
&&
10829 kvm_x86_ops
.nested_ops
->hv_timer_pending(vcpu
))
10835 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
)
10837 return kvm_vcpu_running(vcpu
) || kvm_vcpu_has_events(vcpu
);
10840 bool kvm_arch_dy_runnable(struct kvm_vcpu
*vcpu
)
10842 if (READ_ONCE(vcpu
->arch
.pv
.pv_unhalted
))
10845 if (kvm_test_request(KVM_REQ_NMI
, vcpu
) ||
10846 kvm_test_request(KVM_REQ_SMI
, vcpu
) ||
10847 kvm_test_request(KVM_REQ_EVENT
, vcpu
))
10850 if (vcpu
->arch
.apicv_active
&& kvm_x86_ops
.dy_apicv_has_pending_interrupt(vcpu
))
10856 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu
*vcpu
)
10858 return vcpu
->arch
.preempted_in_kernel
;
10861 int kvm_arch_vcpu_should_kick(struct kvm_vcpu
*vcpu
)
10863 return kvm_vcpu_exiting_guest_mode(vcpu
) == IN_GUEST_MODE
;
10866 int kvm_arch_interrupt_allowed(struct kvm_vcpu
*vcpu
)
10868 return kvm_x86_ops
.interrupt_allowed(vcpu
, false);
10871 unsigned long kvm_get_linear_rip(struct kvm_vcpu
*vcpu
)
10873 /* Can't read the RIP when guest state is protected, just return 0 */
10874 if (vcpu
->arch
.guest_state_protected
)
10877 if (is_64_bit_mode(vcpu
))
10878 return kvm_rip_read(vcpu
);
10879 return (u32
)(get_segment_base(vcpu
, VCPU_SREG_CS
) +
10880 kvm_rip_read(vcpu
));
10882 EXPORT_SYMBOL_GPL(kvm_get_linear_rip
);
10884 bool kvm_is_linear_rip(struct kvm_vcpu
*vcpu
, unsigned long linear_rip
)
10886 return kvm_get_linear_rip(vcpu
) == linear_rip
;
10888 EXPORT_SYMBOL_GPL(kvm_is_linear_rip
);
10890 unsigned long kvm_get_rflags(struct kvm_vcpu
*vcpu
)
10892 unsigned long rflags
;
10894 rflags
= kvm_x86_ops
.get_rflags(vcpu
);
10895 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
)
10896 rflags
&= ~X86_EFLAGS_TF
;
10899 EXPORT_SYMBOL_GPL(kvm_get_rflags
);
10901 static void __kvm_set_rflags(struct kvm_vcpu
*vcpu
, unsigned long rflags
)
10903 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
&&
10904 kvm_is_linear_rip(vcpu
, vcpu
->arch
.singlestep_rip
))
10905 rflags
|= X86_EFLAGS_TF
;
10906 kvm_x86_ops
.set_rflags(vcpu
, rflags
);
10909 void kvm_set_rflags(struct kvm_vcpu
*vcpu
, unsigned long rflags
)
10911 __kvm_set_rflags(vcpu
, rflags
);
10912 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
10914 EXPORT_SYMBOL_GPL(kvm_set_rflags
);
10916 void kvm_arch_async_page_ready(struct kvm_vcpu
*vcpu
, struct kvm_async_pf
*work
)
10920 if ((vcpu
->arch
.mmu
->direct_map
!= work
->arch
.direct_map
) ||
10924 r
= kvm_mmu_reload(vcpu
);
10928 if (!vcpu
->arch
.mmu
->direct_map
&&
10929 work
->arch
.cr3
!= vcpu
->arch
.mmu
->get_guest_pgd(vcpu
))
10932 kvm_mmu_do_page_fault(vcpu
, work
->cr2_or_gpa
, 0, true);
10935 static inline u32
kvm_async_pf_hash_fn(gfn_t gfn
)
10937 BUILD_BUG_ON(!is_power_of_2(ASYNC_PF_PER_VCPU
));
10939 return hash_32(gfn
& 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU
));
10942 static inline u32
kvm_async_pf_next_probe(u32 key
)
10944 return (key
+ 1) & (ASYNC_PF_PER_VCPU
- 1);
10947 static void kvm_add_async_pf_gfn(struct kvm_vcpu
*vcpu
, gfn_t gfn
)
10949 u32 key
= kvm_async_pf_hash_fn(gfn
);
10951 while (vcpu
->arch
.apf
.gfns
[key
] != ~0)
10952 key
= kvm_async_pf_next_probe(key
);
10954 vcpu
->arch
.apf
.gfns
[key
] = gfn
;
10957 static u32
kvm_async_pf_gfn_slot(struct kvm_vcpu
*vcpu
, gfn_t gfn
)
10960 u32 key
= kvm_async_pf_hash_fn(gfn
);
10962 for (i
= 0; i
< ASYNC_PF_PER_VCPU
&&
10963 (vcpu
->arch
.apf
.gfns
[key
] != gfn
&&
10964 vcpu
->arch
.apf
.gfns
[key
] != ~0); i
++)
10965 key
= kvm_async_pf_next_probe(key
);
10970 bool kvm_find_async_pf_gfn(struct kvm_vcpu
*vcpu
, gfn_t gfn
)
10972 return vcpu
->arch
.apf
.gfns
[kvm_async_pf_gfn_slot(vcpu
, gfn
)] == gfn
;
10975 static void kvm_del_async_pf_gfn(struct kvm_vcpu
*vcpu
, gfn_t gfn
)
10979 i
= j
= kvm_async_pf_gfn_slot(vcpu
, gfn
);
10981 if (WARN_ON_ONCE(vcpu
->arch
.apf
.gfns
[i
] != gfn
))
10985 vcpu
->arch
.apf
.gfns
[i
] = ~0;
10987 j
= kvm_async_pf_next_probe(j
);
10988 if (vcpu
->arch
.apf
.gfns
[j
] == ~0)
10990 k
= kvm_async_pf_hash_fn(vcpu
->arch
.apf
.gfns
[j
]);
10992 * k lies cyclically in ]i,j]
10994 * |....j i.k.| or |.k..j i...|
10996 } while ((i
<= j
) ? (i
< k
&& k
<= j
) : (i
< k
|| k
<= j
));
10997 vcpu
->arch
.apf
.gfns
[i
] = vcpu
->arch
.apf
.gfns
[j
];
11002 static inline int apf_put_user_notpresent(struct kvm_vcpu
*vcpu
)
11004 u32 reason
= KVM_PV_REASON_PAGE_NOT_PRESENT
;
11006 return kvm_write_guest_cached(vcpu
->kvm
, &vcpu
->arch
.apf
.data
, &reason
,
11010 static inline int apf_put_user_ready(struct kvm_vcpu
*vcpu
, u32 token
)
11012 unsigned int offset
= offsetof(struct kvm_vcpu_pv_apf_data
, token
);
11014 return kvm_write_guest_offset_cached(vcpu
->kvm
, &vcpu
->arch
.apf
.data
,
11015 &token
, offset
, sizeof(token
));
11018 static inline bool apf_pageready_slot_free(struct kvm_vcpu
*vcpu
)
11020 unsigned int offset
= offsetof(struct kvm_vcpu_pv_apf_data
, token
);
11023 if (kvm_read_guest_offset_cached(vcpu
->kvm
, &vcpu
->arch
.apf
.data
,
11024 &val
, offset
, sizeof(val
)))
11030 static bool kvm_can_deliver_async_pf(struct kvm_vcpu
*vcpu
)
11032 if (!vcpu
->arch
.apf
.delivery_as_pf_vmexit
&& is_guest_mode(vcpu
))
11035 if (!kvm_pv_async_pf_enabled(vcpu
) ||
11036 (vcpu
->arch
.apf
.send_user_only
&& kvm_x86_ops
.get_cpl(vcpu
) == 0))
11042 bool kvm_can_do_async_pf(struct kvm_vcpu
*vcpu
)
11044 if (unlikely(!lapic_in_kernel(vcpu
) ||
11045 kvm_event_needs_reinjection(vcpu
) ||
11046 vcpu
->arch
.exception
.pending
))
11049 if (kvm_hlt_in_guest(vcpu
->kvm
) && !kvm_can_deliver_async_pf(vcpu
))
11053 * If interrupts are off we cannot even use an artificial
11056 return kvm_arch_interrupt_allowed(vcpu
);
11059 bool kvm_arch_async_page_not_present(struct kvm_vcpu
*vcpu
,
11060 struct kvm_async_pf
*work
)
11062 struct x86_exception fault
;
11064 trace_kvm_async_pf_not_present(work
->arch
.token
, work
->cr2_or_gpa
);
11065 kvm_add_async_pf_gfn(vcpu
, work
->arch
.gfn
);
11067 if (kvm_can_deliver_async_pf(vcpu
) &&
11068 !apf_put_user_notpresent(vcpu
)) {
11069 fault
.vector
= PF_VECTOR
;
11070 fault
.error_code_valid
= true;
11071 fault
.error_code
= 0;
11072 fault
.nested_page_fault
= false;
11073 fault
.address
= work
->arch
.token
;
11074 fault
.async_page_fault
= true;
11075 kvm_inject_page_fault(vcpu
, &fault
);
11079 * It is not possible to deliver a paravirtualized asynchronous
11080 * page fault, but putting the guest in an artificial halt state
11081 * can be beneficial nevertheless: if an interrupt arrives, we
11082 * can deliver it timely and perhaps the guest will schedule
11083 * another process. When the instruction that triggered a page
11084 * fault is retried, hopefully the page will be ready in the host.
11086 kvm_make_request(KVM_REQ_APF_HALT
, vcpu
);
11091 void kvm_arch_async_page_present(struct kvm_vcpu
*vcpu
,
11092 struct kvm_async_pf
*work
)
11094 struct kvm_lapic_irq irq
= {
11095 .delivery_mode
= APIC_DM_FIXED
,
11096 .vector
= vcpu
->arch
.apf
.vec
11099 if (work
->wakeup_all
)
11100 work
->arch
.token
= ~0; /* broadcast wakeup */
11102 kvm_del_async_pf_gfn(vcpu
, work
->arch
.gfn
);
11103 trace_kvm_async_pf_ready(work
->arch
.token
, work
->cr2_or_gpa
);
11105 if ((work
->wakeup_all
|| work
->notpresent_injected
) &&
11106 kvm_pv_async_pf_enabled(vcpu
) &&
11107 !apf_put_user_ready(vcpu
, work
->arch
.token
)) {
11108 vcpu
->arch
.apf
.pageready_pending
= true;
11109 kvm_apic_set_irq(vcpu
, &irq
, NULL
);
11112 vcpu
->arch
.apf
.halted
= false;
11113 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
11116 void kvm_arch_async_page_present_queued(struct kvm_vcpu
*vcpu
)
11118 kvm_make_request(KVM_REQ_APF_READY
, vcpu
);
11119 if (!vcpu
->arch
.apf
.pageready_pending
)
11120 kvm_vcpu_kick(vcpu
);
11123 bool kvm_arch_can_dequeue_async_page_present(struct kvm_vcpu
*vcpu
)
11125 if (!kvm_pv_async_pf_enabled(vcpu
))
11128 return apf_pageready_slot_free(vcpu
);
11131 void kvm_arch_start_assignment(struct kvm
*kvm
)
11133 atomic_inc(&kvm
->arch
.assigned_device_count
);
11135 EXPORT_SYMBOL_GPL(kvm_arch_start_assignment
);
11137 void kvm_arch_end_assignment(struct kvm
*kvm
)
11139 atomic_dec(&kvm
->arch
.assigned_device_count
);
11141 EXPORT_SYMBOL_GPL(kvm_arch_end_assignment
);
11143 bool kvm_arch_has_assigned_device(struct kvm
*kvm
)
11145 return atomic_read(&kvm
->arch
.assigned_device_count
);
11147 EXPORT_SYMBOL_GPL(kvm_arch_has_assigned_device
);
11149 void kvm_arch_register_noncoherent_dma(struct kvm
*kvm
)
11151 atomic_inc(&kvm
->arch
.noncoherent_dma_count
);
11153 EXPORT_SYMBOL_GPL(kvm_arch_register_noncoherent_dma
);
11155 void kvm_arch_unregister_noncoherent_dma(struct kvm
*kvm
)
11157 atomic_dec(&kvm
->arch
.noncoherent_dma_count
);
11159 EXPORT_SYMBOL_GPL(kvm_arch_unregister_noncoherent_dma
);
11161 bool kvm_arch_has_noncoherent_dma(struct kvm
*kvm
)
11163 return atomic_read(&kvm
->arch
.noncoherent_dma_count
);
11165 EXPORT_SYMBOL_GPL(kvm_arch_has_noncoherent_dma
);
11167 bool kvm_arch_has_irq_bypass(void)
11172 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer
*cons
,
11173 struct irq_bypass_producer
*prod
)
11175 struct kvm_kernel_irqfd
*irqfd
=
11176 container_of(cons
, struct kvm_kernel_irqfd
, consumer
);
11179 irqfd
->producer
= prod
;
11180 kvm_arch_start_assignment(irqfd
->kvm
);
11181 ret
= kvm_x86_ops
.update_pi_irte(irqfd
->kvm
,
11182 prod
->irq
, irqfd
->gsi
, 1);
11185 kvm_arch_end_assignment(irqfd
->kvm
);
11190 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer
*cons
,
11191 struct irq_bypass_producer
*prod
)
11194 struct kvm_kernel_irqfd
*irqfd
=
11195 container_of(cons
, struct kvm_kernel_irqfd
, consumer
);
11197 WARN_ON(irqfd
->producer
!= prod
);
11198 irqfd
->producer
= NULL
;
11201 * When producer of consumer is unregistered, we change back to
11202 * remapped mode, so we can re-use the current implementation
11203 * when the irq is masked/disabled or the consumer side (KVM
11204 * int this case doesn't want to receive the interrupts.
11206 ret
= kvm_x86_ops
.update_pi_irte(irqfd
->kvm
, prod
->irq
, irqfd
->gsi
, 0);
11208 printk(KERN_INFO
"irq bypass consumer (token %p) unregistration"
11209 " fails: %d\n", irqfd
->consumer
.token
, ret
);
11211 kvm_arch_end_assignment(irqfd
->kvm
);
11214 int kvm_arch_update_irqfd_routing(struct kvm
*kvm
, unsigned int host_irq
,
11215 uint32_t guest_irq
, bool set
)
11217 return kvm_x86_ops
.update_pi_irte(kvm
, host_irq
, guest_irq
, set
);
11220 bool kvm_vector_hashing_enabled(void)
11222 return vector_hashing
;
11225 bool kvm_arch_no_poll(struct kvm_vcpu
*vcpu
)
11227 return (vcpu
->arch
.msr_kvm_poll_control
& 1) == 0;
11229 EXPORT_SYMBOL_GPL(kvm_arch_no_poll
);
11232 int kvm_spec_ctrl_test_value(u64 value
)
11235 * test that setting IA32_SPEC_CTRL to given value
11236 * is allowed by the host processor
11240 unsigned long flags
;
11243 local_irq_save(flags
);
11245 if (rdmsrl_safe(MSR_IA32_SPEC_CTRL
, &saved_value
))
11247 else if (wrmsrl_safe(MSR_IA32_SPEC_CTRL
, value
))
11250 wrmsrl(MSR_IA32_SPEC_CTRL
, saved_value
);
11252 local_irq_restore(flags
);
11256 EXPORT_SYMBOL_GPL(kvm_spec_ctrl_test_value
);
11258 void kvm_fixup_and_inject_pf_error(struct kvm_vcpu
*vcpu
, gva_t gva
, u16 error_code
)
11260 struct x86_exception fault
;
11261 u32 access
= error_code
&
11262 (PFERR_WRITE_MASK
| PFERR_FETCH_MASK
| PFERR_USER_MASK
);
11264 if (!(error_code
& PFERR_PRESENT_MASK
) ||
11265 vcpu
->arch
.walk_mmu
->gva_to_gpa(vcpu
, gva
, access
, &fault
) != UNMAPPED_GVA
) {
11267 * If vcpu->arch.walk_mmu->gva_to_gpa succeeded, the page
11268 * tables probably do not match the TLB. Just proceed
11269 * with the error code that the processor gave.
11271 fault
.vector
= PF_VECTOR
;
11272 fault
.error_code_valid
= true;
11273 fault
.error_code
= error_code
;
11274 fault
.nested_page_fault
= false;
11275 fault
.address
= gva
;
11277 vcpu
->arch
.walk_mmu
->inject_page_fault(vcpu
, &fault
);
11279 EXPORT_SYMBOL_GPL(kvm_fixup_and_inject_pf_error
);
11282 * Handles kvm_read/write_guest_virt*() result and either injects #PF or returns
11283 * KVM_EXIT_INTERNAL_ERROR for cases not currently handled by KVM. Return value
11284 * indicates whether exit to userspace is needed.
11286 int kvm_handle_memory_failure(struct kvm_vcpu
*vcpu
, int r
,
11287 struct x86_exception
*e
)
11289 if (r
== X86EMUL_PROPAGATE_FAULT
) {
11290 kvm_inject_emulated_page_fault(vcpu
, e
);
11295 * In case kvm_read/write_guest_virt*() failed with X86EMUL_IO_NEEDED
11296 * while handling a VMX instruction KVM could've handled the request
11297 * correctly by exiting to userspace and performing I/O but there
11298 * doesn't seem to be a real use-case behind such requests, just return
11299 * KVM_EXIT_INTERNAL_ERROR for now.
11301 vcpu
->run
->exit_reason
= KVM_EXIT_INTERNAL_ERROR
;
11302 vcpu
->run
->internal
.suberror
= KVM_INTERNAL_ERROR_EMULATION
;
11303 vcpu
->run
->internal
.ndata
= 0;
11307 EXPORT_SYMBOL_GPL(kvm_handle_memory_failure
);
11309 int kvm_handle_invpcid(struct kvm_vcpu
*vcpu
, unsigned long type
, gva_t gva
)
11312 struct x86_exception e
;
11314 unsigned long roots_to_free
= 0;
11321 r
= kvm_read_guest_virt(vcpu
, gva
, &operand
, sizeof(operand
), &e
);
11322 if (r
!= X86EMUL_CONTINUE
)
11323 return kvm_handle_memory_failure(vcpu
, r
, &e
);
11325 if (operand
.pcid
>> 12 != 0) {
11326 kvm_inject_gp(vcpu
, 0);
11330 pcid_enabled
= kvm_read_cr4_bits(vcpu
, X86_CR4_PCIDE
);
11333 case INVPCID_TYPE_INDIV_ADDR
:
11334 if ((!pcid_enabled
&& (operand
.pcid
!= 0)) ||
11335 is_noncanonical_address(operand
.gla
, vcpu
)) {
11336 kvm_inject_gp(vcpu
, 0);
11339 kvm_mmu_invpcid_gva(vcpu
, operand
.gla
, operand
.pcid
);
11340 return kvm_skip_emulated_instruction(vcpu
);
11342 case INVPCID_TYPE_SINGLE_CTXT
:
11343 if (!pcid_enabled
&& (operand
.pcid
!= 0)) {
11344 kvm_inject_gp(vcpu
, 0);
11348 if (kvm_get_active_pcid(vcpu
) == operand
.pcid
) {
11349 kvm_mmu_sync_roots(vcpu
);
11350 kvm_make_request(KVM_REQ_TLB_FLUSH_CURRENT
, vcpu
);
11353 for (i
= 0; i
< KVM_MMU_NUM_PREV_ROOTS
; i
++)
11354 if (kvm_get_pcid(vcpu
, vcpu
->arch
.mmu
->prev_roots
[i
].pgd
)
11356 roots_to_free
|= KVM_MMU_ROOT_PREVIOUS(i
);
11358 kvm_mmu_free_roots(vcpu
, vcpu
->arch
.mmu
, roots_to_free
);
11360 * If neither the current cr3 nor any of the prev_roots use the
11361 * given PCID, then nothing needs to be done here because a
11362 * resync will happen anyway before switching to any other CR3.
11365 return kvm_skip_emulated_instruction(vcpu
);
11367 case INVPCID_TYPE_ALL_NON_GLOBAL
:
11369 * Currently, KVM doesn't mark global entries in the shadow
11370 * page tables, so a non-global flush just degenerates to a
11371 * global flush. If needed, we could optimize this later by
11372 * keeping track of global entries in shadow page tables.
11376 case INVPCID_TYPE_ALL_INCL_GLOBAL
:
11377 kvm_mmu_unload(vcpu
);
11378 return kvm_skip_emulated_instruction(vcpu
);
11381 BUG(); /* We have already checked above that type <= 3 */
11384 EXPORT_SYMBOL_GPL(kvm_handle_invpcid
);
11386 static int complete_sev_es_emulated_mmio(struct kvm_vcpu
*vcpu
)
11388 struct kvm_run
*run
= vcpu
->run
;
11389 struct kvm_mmio_fragment
*frag
;
11392 BUG_ON(!vcpu
->mmio_needed
);
11394 /* Complete previous fragment */
11395 frag
= &vcpu
->mmio_fragments
[vcpu
->mmio_cur_fragment
];
11396 len
= min(8u, frag
->len
);
11397 if (!vcpu
->mmio_is_write
)
11398 memcpy(frag
->data
, run
->mmio
.data
, len
);
11400 if (frag
->len
<= 8) {
11401 /* Switch to the next fragment. */
11403 vcpu
->mmio_cur_fragment
++;
11405 /* Go forward to the next mmio piece. */
11411 if (vcpu
->mmio_cur_fragment
>= vcpu
->mmio_nr_fragments
) {
11412 vcpu
->mmio_needed
= 0;
11414 // VMG change, at this point, we're always done
11415 // RIP has already been advanced
11419 // More MMIO is needed
11420 run
->mmio
.phys_addr
= frag
->gpa
;
11421 run
->mmio
.len
= min(8u, frag
->len
);
11422 run
->mmio
.is_write
= vcpu
->mmio_is_write
;
11423 if (run
->mmio
.is_write
)
11424 memcpy(run
->mmio
.data
, frag
->data
, min(8u, frag
->len
));
11425 run
->exit_reason
= KVM_EXIT_MMIO
;
11427 vcpu
->arch
.complete_userspace_io
= complete_sev_es_emulated_mmio
;
11432 int kvm_sev_es_mmio_write(struct kvm_vcpu
*vcpu
, gpa_t gpa
, unsigned int bytes
,
11436 struct kvm_mmio_fragment
*frag
;
11441 handled
= write_emultor
.read_write_mmio(vcpu
, gpa
, bytes
, data
);
11442 if (handled
== bytes
)
11449 /*TODO: Check if need to increment number of frags */
11450 frag
= vcpu
->mmio_fragments
;
11451 vcpu
->mmio_nr_fragments
= 1;
11456 vcpu
->mmio_needed
= 1;
11457 vcpu
->mmio_cur_fragment
= 0;
11459 vcpu
->run
->mmio
.phys_addr
= gpa
;
11460 vcpu
->run
->mmio
.len
= min(8u, frag
->len
);
11461 vcpu
->run
->mmio
.is_write
= 1;
11462 memcpy(vcpu
->run
->mmio
.data
, frag
->data
, min(8u, frag
->len
));
11463 vcpu
->run
->exit_reason
= KVM_EXIT_MMIO
;
11465 vcpu
->arch
.complete_userspace_io
= complete_sev_es_emulated_mmio
;
11469 EXPORT_SYMBOL_GPL(kvm_sev_es_mmio_write
);
11471 int kvm_sev_es_mmio_read(struct kvm_vcpu
*vcpu
, gpa_t gpa
, unsigned int bytes
,
11475 struct kvm_mmio_fragment
*frag
;
11480 handled
= read_emultor
.read_write_mmio(vcpu
, gpa
, bytes
, data
);
11481 if (handled
== bytes
)
11488 /*TODO: Check if need to increment number of frags */
11489 frag
= vcpu
->mmio_fragments
;
11490 vcpu
->mmio_nr_fragments
= 1;
11495 vcpu
->mmio_needed
= 1;
11496 vcpu
->mmio_cur_fragment
= 0;
11498 vcpu
->run
->mmio
.phys_addr
= gpa
;
11499 vcpu
->run
->mmio
.len
= min(8u, frag
->len
);
11500 vcpu
->run
->mmio
.is_write
= 0;
11501 vcpu
->run
->exit_reason
= KVM_EXIT_MMIO
;
11503 vcpu
->arch
.complete_userspace_io
= complete_sev_es_emulated_mmio
;
11507 EXPORT_SYMBOL_GPL(kvm_sev_es_mmio_read
);
11509 static int complete_sev_es_emulated_ins(struct kvm_vcpu
*vcpu
)
11511 memcpy(vcpu
->arch
.guest_ins_data
, vcpu
->arch
.pio_data
,
11512 vcpu
->arch
.pio
.count
* vcpu
->arch
.pio
.size
);
11513 vcpu
->arch
.pio
.count
= 0;
11518 static int kvm_sev_es_outs(struct kvm_vcpu
*vcpu
, unsigned int size
,
11519 unsigned int port
, void *data
, unsigned int count
)
11523 ret
= emulator_pio_out_emulated(vcpu
->arch
.emulate_ctxt
, size
, port
,
11528 vcpu
->arch
.pio
.count
= 0;
11533 static int kvm_sev_es_ins(struct kvm_vcpu
*vcpu
, unsigned int size
,
11534 unsigned int port
, void *data
, unsigned int count
)
11538 ret
= emulator_pio_in_emulated(vcpu
->arch
.emulate_ctxt
, size
, port
,
11541 vcpu
->arch
.pio
.count
= 0;
11543 vcpu
->arch
.guest_ins_data
= data
;
11544 vcpu
->arch
.complete_userspace_io
= complete_sev_es_emulated_ins
;
11550 int kvm_sev_es_string_io(struct kvm_vcpu
*vcpu
, unsigned int size
,
11551 unsigned int port
, void *data
, unsigned int count
,
11554 return in
? kvm_sev_es_ins(vcpu
, size
, port
, data
, count
)
11555 : kvm_sev_es_outs(vcpu
, size
, port
, data
, count
);
11557 EXPORT_SYMBOL_GPL(kvm_sev_es_string_io
);
11559 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_entry
);
11560 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit
);
11561 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_fast_mmio
);
11562 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq
);
11563 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault
);
11564 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr
);
11565 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr
);
11566 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun
);
11567 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit
);
11568 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject
);
11569 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit
);
11570 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmenter_failed
);
11571 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga
);
11572 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit
);
11573 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts
);
11574 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_write_tsc_offset
);
11575 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ple_window_update
);
11576 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pml_full
);
11577 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pi_irte_update
);
11578 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_unaccelerated_access
);
11579 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_incomplete_ipi
);
11580 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_ga_log
);
11581 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_apicv_update_request
);
11582 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_enter
);
11583 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_exit
);
11584 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_msr_protocol_enter
);
11585 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_msr_protocol_exit
);