2 * Kernel-based Virtual Machine driver for Linux
4 * derived from drivers/kvm/kvm_main.c
6 * Copyright (C) 2006 Qumranet, Inc.
7 * Copyright (C) 2008 Qumranet, Inc.
8 * Copyright IBM Corporation, 2008
9 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
12 * Avi Kivity <avi@qumranet.com>
13 * Yaniv Kamay <yaniv@qumranet.com>
14 * Amit Shah <amit.shah@qumranet.com>
15 * Ben-Ami Yassour <benami@il.ibm.com>
17 * This work is licensed under the terms of the GNU GPL, version 2. See
18 * the COPYING file in the top-level directory.
22 #include <linux/kvm_host.h>
27 #include "kvm_cache_regs.h"
30 #include <linux/clocksource.h>
31 #include <linux/interrupt.h>
32 #include <linux/kvm.h>
34 #include <linux/vmalloc.h>
35 #include <linux/module.h>
36 #include <linux/mman.h>
37 #include <linux/highmem.h>
38 #include <linux/iommu.h>
39 #include <linux/intel-iommu.h>
40 #include <linux/cpufreq.h>
41 #include <linux/user-return-notifier.h>
42 #include <linux/srcu.h>
43 #include <linux/slab.h>
44 #include <linux/perf_event.h>
45 #include <linux/uaccess.h>
46 #include <linux/hash.h>
47 #include <trace/events/kvm.h>
49 #define CREATE_TRACE_POINTS
52 #include <asm/debugreg.h>
59 #include <asm/pvclock.h>
60 #include <asm/div64.h>
62 #define MAX_IO_MSRS 256
63 #define CR0_RESERVED_BITS \
64 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
65 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
66 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
67 #define CR4_RESERVED_BITS \
68 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
69 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
70 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
72 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
74 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
76 #define KVM_MAX_MCE_BANKS 32
77 #define KVM_MCE_CAP_SUPPORTED (MCG_CTL_P | MCG_SER_P)
80 * - enable syscall per default because its emulated by KVM
81 * - enable LME and LMA per default on 64 bit KVM
84 static u64 __read_mostly efer_reserved_bits
= 0xfffffffffffffafeULL
;
86 static u64 __read_mostly efer_reserved_bits
= 0xfffffffffffffffeULL
;
89 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
90 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
92 static void update_cr8_intercept(struct kvm_vcpu
*vcpu
);
93 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2
*cpuid
,
94 struct kvm_cpuid_entry2 __user
*entries
);
96 struct kvm_x86_ops
*kvm_x86_ops
;
97 EXPORT_SYMBOL_GPL(kvm_x86_ops
);
100 module_param_named(ignore_msrs
, ignore_msrs
, bool, S_IRUGO
| S_IWUSR
);
102 #define KVM_NR_SHARED_MSRS 16
104 struct kvm_shared_msrs_global
{
106 u32 msrs
[KVM_NR_SHARED_MSRS
];
109 struct kvm_shared_msrs
{
110 struct user_return_notifier urn
;
112 struct kvm_shared_msr_values
{
115 } values
[KVM_NR_SHARED_MSRS
];
118 static struct kvm_shared_msrs_global __read_mostly shared_msrs_global
;
119 static DEFINE_PER_CPU(struct kvm_shared_msrs
, shared_msrs
);
121 struct kvm_stats_debugfs_item debugfs_entries
[] = {
122 { "pf_fixed", VCPU_STAT(pf_fixed
) },
123 { "pf_guest", VCPU_STAT(pf_guest
) },
124 { "tlb_flush", VCPU_STAT(tlb_flush
) },
125 { "invlpg", VCPU_STAT(invlpg
) },
126 { "exits", VCPU_STAT(exits
) },
127 { "io_exits", VCPU_STAT(io_exits
) },
128 { "mmio_exits", VCPU_STAT(mmio_exits
) },
129 { "signal_exits", VCPU_STAT(signal_exits
) },
130 { "irq_window", VCPU_STAT(irq_window_exits
) },
131 { "nmi_window", VCPU_STAT(nmi_window_exits
) },
132 { "halt_exits", VCPU_STAT(halt_exits
) },
133 { "halt_wakeup", VCPU_STAT(halt_wakeup
) },
134 { "hypercalls", VCPU_STAT(hypercalls
) },
135 { "request_irq", VCPU_STAT(request_irq_exits
) },
136 { "irq_exits", VCPU_STAT(irq_exits
) },
137 { "host_state_reload", VCPU_STAT(host_state_reload
) },
138 { "efer_reload", VCPU_STAT(efer_reload
) },
139 { "fpu_reload", VCPU_STAT(fpu_reload
) },
140 { "insn_emulation", VCPU_STAT(insn_emulation
) },
141 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail
) },
142 { "irq_injections", VCPU_STAT(irq_injections
) },
143 { "nmi_injections", VCPU_STAT(nmi_injections
) },
144 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped
) },
145 { "mmu_pte_write", VM_STAT(mmu_pte_write
) },
146 { "mmu_pte_updated", VM_STAT(mmu_pte_updated
) },
147 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped
) },
148 { "mmu_flooded", VM_STAT(mmu_flooded
) },
149 { "mmu_recycled", VM_STAT(mmu_recycled
) },
150 { "mmu_cache_miss", VM_STAT(mmu_cache_miss
) },
151 { "mmu_unsync", VM_STAT(mmu_unsync
) },
152 { "remote_tlb_flush", VM_STAT(remote_tlb_flush
) },
153 { "largepages", VM_STAT(lpages
) },
157 u64 __read_mostly host_xcr0
;
159 static inline void kvm_async_pf_hash_reset(struct kvm_vcpu
*vcpu
)
162 for (i
= 0; i
< roundup_pow_of_two(ASYNC_PF_PER_VCPU
); i
++)
163 vcpu
->arch
.apf
.gfns
[i
] = ~0;
166 static void kvm_on_user_return(struct user_return_notifier
*urn
)
169 struct kvm_shared_msrs
*locals
170 = container_of(urn
, struct kvm_shared_msrs
, urn
);
171 struct kvm_shared_msr_values
*values
;
173 for (slot
= 0; slot
< shared_msrs_global
.nr
; ++slot
) {
174 values
= &locals
->values
[slot
];
175 if (values
->host
!= values
->curr
) {
176 wrmsrl(shared_msrs_global
.msrs
[slot
], values
->host
);
177 values
->curr
= values
->host
;
180 locals
->registered
= false;
181 user_return_notifier_unregister(urn
);
184 static void shared_msr_update(unsigned slot
, u32 msr
)
186 struct kvm_shared_msrs
*smsr
;
189 smsr
= &__get_cpu_var(shared_msrs
);
190 /* only read, and nobody should modify it at this time,
191 * so don't need lock */
192 if (slot
>= shared_msrs_global
.nr
) {
193 printk(KERN_ERR
"kvm: invalid MSR slot!");
196 rdmsrl_safe(msr
, &value
);
197 smsr
->values
[slot
].host
= value
;
198 smsr
->values
[slot
].curr
= value
;
201 void kvm_define_shared_msr(unsigned slot
, u32 msr
)
203 if (slot
>= shared_msrs_global
.nr
)
204 shared_msrs_global
.nr
= slot
+ 1;
205 shared_msrs_global
.msrs
[slot
] = msr
;
206 /* we need ensured the shared_msr_global have been updated */
209 EXPORT_SYMBOL_GPL(kvm_define_shared_msr
);
211 static void kvm_shared_msr_cpu_online(void)
215 for (i
= 0; i
< shared_msrs_global
.nr
; ++i
)
216 shared_msr_update(i
, shared_msrs_global
.msrs
[i
]);
219 void kvm_set_shared_msr(unsigned slot
, u64 value
, u64 mask
)
221 struct kvm_shared_msrs
*smsr
= &__get_cpu_var(shared_msrs
);
223 if (((value
^ smsr
->values
[slot
].curr
) & mask
) == 0)
225 smsr
->values
[slot
].curr
= value
;
226 wrmsrl(shared_msrs_global
.msrs
[slot
], value
);
227 if (!smsr
->registered
) {
228 smsr
->urn
.on_user_return
= kvm_on_user_return
;
229 user_return_notifier_register(&smsr
->urn
);
230 smsr
->registered
= true;
233 EXPORT_SYMBOL_GPL(kvm_set_shared_msr
);
235 static void drop_user_return_notifiers(void *ignore
)
237 struct kvm_shared_msrs
*smsr
= &__get_cpu_var(shared_msrs
);
239 if (smsr
->registered
)
240 kvm_on_user_return(&smsr
->urn
);
243 u64
kvm_get_apic_base(struct kvm_vcpu
*vcpu
)
245 if (irqchip_in_kernel(vcpu
->kvm
))
246 return vcpu
->arch
.apic_base
;
248 return vcpu
->arch
.apic_base
;
250 EXPORT_SYMBOL_GPL(kvm_get_apic_base
);
252 void kvm_set_apic_base(struct kvm_vcpu
*vcpu
, u64 data
)
254 /* TODO: reserve bits check */
255 if (irqchip_in_kernel(vcpu
->kvm
))
256 kvm_lapic_set_base(vcpu
, data
);
258 vcpu
->arch
.apic_base
= data
;
260 EXPORT_SYMBOL_GPL(kvm_set_apic_base
);
262 #define EXCPT_BENIGN 0
263 #define EXCPT_CONTRIBUTORY 1
266 static int exception_class(int vector
)
276 return EXCPT_CONTRIBUTORY
;
283 static void kvm_multiple_exception(struct kvm_vcpu
*vcpu
,
284 unsigned nr
, bool has_error
, u32 error_code
,
290 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
292 if (!vcpu
->arch
.exception
.pending
) {
294 vcpu
->arch
.exception
.pending
= true;
295 vcpu
->arch
.exception
.has_error_code
= has_error
;
296 vcpu
->arch
.exception
.nr
= nr
;
297 vcpu
->arch
.exception
.error_code
= error_code
;
298 vcpu
->arch
.exception
.reinject
= reinject
;
302 /* to check exception */
303 prev_nr
= vcpu
->arch
.exception
.nr
;
304 if (prev_nr
== DF_VECTOR
) {
305 /* triple fault -> shutdown */
306 kvm_make_request(KVM_REQ_TRIPLE_FAULT
, vcpu
);
309 class1
= exception_class(prev_nr
);
310 class2
= exception_class(nr
);
311 if ((class1
== EXCPT_CONTRIBUTORY
&& class2
== EXCPT_CONTRIBUTORY
)
312 || (class1
== EXCPT_PF
&& class2
!= EXCPT_BENIGN
)) {
313 /* generate double fault per SDM Table 5-5 */
314 vcpu
->arch
.exception
.pending
= true;
315 vcpu
->arch
.exception
.has_error_code
= true;
316 vcpu
->arch
.exception
.nr
= DF_VECTOR
;
317 vcpu
->arch
.exception
.error_code
= 0;
319 /* replace previous exception with a new one in a hope
320 that instruction re-execution will regenerate lost
325 void kvm_queue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
)
327 kvm_multiple_exception(vcpu
, nr
, false, 0, false);
329 EXPORT_SYMBOL_GPL(kvm_queue_exception
);
331 void kvm_requeue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
)
333 kvm_multiple_exception(vcpu
, nr
, false, 0, true);
335 EXPORT_SYMBOL_GPL(kvm_requeue_exception
);
337 void kvm_inject_page_fault(struct kvm_vcpu
*vcpu
)
339 unsigned error_code
= vcpu
->arch
.fault
.error_code
;
341 ++vcpu
->stat
.pf_guest
;
342 vcpu
->arch
.cr2
= vcpu
->arch
.fault
.address
;
343 kvm_queue_exception_e(vcpu
, PF_VECTOR
, error_code
);
346 void kvm_propagate_fault(struct kvm_vcpu
*vcpu
)
348 if (mmu_is_nested(vcpu
) && !vcpu
->arch
.fault
.nested
)
349 vcpu
->arch
.nested_mmu
.inject_page_fault(vcpu
);
351 vcpu
->arch
.mmu
.inject_page_fault(vcpu
);
353 vcpu
->arch
.fault
.nested
= false;
356 void kvm_inject_nmi(struct kvm_vcpu
*vcpu
)
358 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
359 vcpu
->arch
.nmi_pending
= 1;
361 EXPORT_SYMBOL_GPL(kvm_inject_nmi
);
363 void kvm_queue_exception_e(struct kvm_vcpu
*vcpu
, unsigned nr
, u32 error_code
)
365 kvm_multiple_exception(vcpu
, nr
, true, error_code
, false);
367 EXPORT_SYMBOL_GPL(kvm_queue_exception_e
);
369 void kvm_requeue_exception_e(struct kvm_vcpu
*vcpu
, unsigned nr
, u32 error_code
)
371 kvm_multiple_exception(vcpu
, nr
, true, error_code
, true);
373 EXPORT_SYMBOL_GPL(kvm_requeue_exception_e
);
376 * Checks if cpl <= required_cpl; if true, return true. Otherwise queue
377 * a #GP and return false.
379 bool kvm_require_cpl(struct kvm_vcpu
*vcpu
, int required_cpl
)
381 if (kvm_x86_ops
->get_cpl(vcpu
) <= required_cpl
)
383 kvm_queue_exception_e(vcpu
, GP_VECTOR
, 0);
386 EXPORT_SYMBOL_GPL(kvm_require_cpl
);
389 * This function will be used to read from the physical memory of the currently
390 * running guest. The difference to kvm_read_guest_page is that this function
391 * can read from guest physical or from the guest's guest physical memory.
393 int kvm_read_guest_page_mmu(struct kvm_vcpu
*vcpu
, struct kvm_mmu
*mmu
,
394 gfn_t ngfn
, void *data
, int offset
, int len
,
400 ngpa
= gfn_to_gpa(ngfn
);
401 real_gfn
= mmu
->translate_gpa(vcpu
, ngpa
, access
);
402 if (real_gfn
== UNMAPPED_GVA
)
405 real_gfn
= gpa_to_gfn(real_gfn
);
407 return kvm_read_guest_page(vcpu
->kvm
, real_gfn
, data
, offset
, len
);
409 EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu
);
411 int kvm_read_nested_guest_page(struct kvm_vcpu
*vcpu
, gfn_t gfn
,
412 void *data
, int offset
, int len
, u32 access
)
414 return kvm_read_guest_page_mmu(vcpu
, vcpu
->arch
.walk_mmu
, gfn
,
415 data
, offset
, len
, access
);
419 * Load the pae pdptrs. Return true is they are all valid.
421 int load_pdptrs(struct kvm_vcpu
*vcpu
, struct kvm_mmu
*mmu
, unsigned long cr3
)
423 gfn_t pdpt_gfn
= cr3
>> PAGE_SHIFT
;
424 unsigned offset
= ((cr3
& (PAGE_SIZE
-1)) >> 5) << 2;
427 u64 pdpte
[ARRAY_SIZE(mmu
->pdptrs
)];
429 ret
= kvm_read_guest_page_mmu(vcpu
, mmu
, pdpt_gfn
, pdpte
,
430 offset
* sizeof(u64
), sizeof(pdpte
),
431 PFERR_USER_MASK
|PFERR_WRITE_MASK
);
436 for (i
= 0; i
< ARRAY_SIZE(pdpte
); ++i
) {
437 if (is_present_gpte(pdpte
[i
]) &&
438 (pdpte
[i
] & vcpu
->arch
.mmu
.rsvd_bits_mask
[0][2])) {
445 memcpy(mmu
->pdptrs
, pdpte
, sizeof(mmu
->pdptrs
));
446 __set_bit(VCPU_EXREG_PDPTR
,
447 (unsigned long *)&vcpu
->arch
.regs_avail
);
448 __set_bit(VCPU_EXREG_PDPTR
,
449 (unsigned long *)&vcpu
->arch
.regs_dirty
);
454 EXPORT_SYMBOL_GPL(load_pdptrs
);
456 static bool pdptrs_changed(struct kvm_vcpu
*vcpu
)
458 u64 pdpte
[ARRAY_SIZE(vcpu
->arch
.walk_mmu
->pdptrs
)];
464 if (is_long_mode(vcpu
) || !is_pae(vcpu
))
467 if (!test_bit(VCPU_EXREG_PDPTR
,
468 (unsigned long *)&vcpu
->arch
.regs_avail
))
471 gfn
= (vcpu
->arch
.cr3
& ~31u) >> PAGE_SHIFT
;
472 offset
= (vcpu
->arch
.cr3
& ~31u) & (PAGE_SIZE
- 1);
473 r
= kvm_read_nested_guest_page(vcpu
, gfn
, pdpte
, offset
, sizeof(pdpte
),
474 PFERR_USER_MASK
| PFERR_WRITE_MASK
);
477 changed
= memcmp(pdpte
, vcpu
->arch
.walk_mmu
->pdptrs
, sizeof(pdpte
)) != 0;
483 int kvm_set_cr0(struct kvm_vcpu
*vcpu
, unsigned long cr0
)
485 unsigned long old_cr0
= kvm_read_cr0(vcpu
);
486 unsigned long update_bits
= X86_CR0_PG
| X86_CR0_WP
|
487 X86_CR0_CD
| X86_CR0_NW
;
492 if (cr0
& 0xffffffff00000000UL
)
496 cr0
&= ~CR0_RESERVED_BITS
;
498 if ((cr0
& X86_CR0_NW
) && !(cr0
& X86_CR0_CD
))
501 if ((cr0
& X86_CR0_PG
) && !(cr0
& X86_CR0_PE
))
504 if (!is_paging(vcpu
) && (cr0
& X86_CR0_PG
)) {
506 if ((vcpu
->arch
.efer
& EFER_LME
)) {
511 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
516 if (is_pae(vcpu
) && !load_pdptrs(vcpu
, vcpu
->arch
.walk_mmu
,
521 kvm_x86_ops
->set_cr0(vcpu
, cr0
);
523 if ((cr0
^ old_cr0
) & update_bits
)
524 kvm_mmu_reset_context(vcpu
);
527 EXPORT_SYMBOL_GPL(kvm_set_cr0
);
529 void kvm_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
)
531 (void)kvm_set_cr0(vcpu
, kvm_read_cr0_bits(vcpu
, ~0x0eul
) | (msw
& 0x0f));
533 EXPORT_SYMBOL_GPL(kvm_lmsw
);
535 int __kvm_set_xcr(struct kvm_vcpu
*vcpu
, u32 index
, u64 xcr
)
539 /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */
540 if (index
!= XCR_XFEATURE_ENABLED_MASK
)
543 if (kvm_x86_ops
->get_cpl(vcpu
) != 0)
545 if (!(xcr0
& XSTATE_FP
))
547 if ((xcr0
& XSTATE_YMM
) && !(xcr0
& XSTATE_SSE
))
549 if (xcr0
& ~host_xcr0
)
551 vcpu
->arch
.xcr0
= xcr0
;
552 vcpu
->guest_xcr0_loaded
= 0;
556 int kvm_set_xcr(struct kvm_vcpu
*vcpu
, u32 index
, u64 xcr
)
558 if (__kvm_set_xcr(vcpu
, index
, xcr
)) {
559 kvm_inject_gp(vcpu
, 0);
564 EXPORT_SYMBOL_GPL(kvm_set_xcr
);
566 static bool guest_cpuid_has_xsave(struct kvm_vcpu
*vcpu
)
568 struct kvm_cpuid_entry2
*best
;
570 best
= kvm_find_cpuid_entry(vcpu
, 1, 0);
571 return best
&& (best
->ecx
& bit(X86_FEATURE_XSAVE
));
574 static void update_cpuid(struct kvm_vcpu
*vcpu
)
576 struct kvm_cpuid_entry2
*best
;
578 best
= kvm_find_cpuid_entry(vcpu
, 1, 0);
582 /* Update OSXSAVE bit */
583 if (cpu_has_xsave
&& best
->function
== 0x1) {
584 best
->ecx
&= ~(bit(X86_FEATURE_OSXSAVE
));
585 if (kvm_read_cr4_bits(vcpu
, X86_CR4_OSXSAVE
))
586 best
->ecx
|= bit(X86_FEATURE_OSXSAVE
);
590 int kvm_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
)
592 unsigned long old_cr4
= kvm_read_cr4(vcpu
);
593 unsigned long pdptr_bits
= X86_CR4_PGE
| X86_CR4_PSE
| X86_CR4_PAE
;
595 if (cr4
& CR4_RESERVED_BITS
)
598 if (!guest_cpuid_has_xsave(vcpu
) && (cr4
& X86_CR4_OSXSAVE
))
601 if (is_long_mode(vcpu
)) {
602 if (!(cr4
& X86_CR4_PAE
))
604 } else if (is_paging(vcpu
) && (cr4
& X86_CR4_PAE
)
605 && ((cr4
^ old_cr4
) & pdptr_bits
)
606 && !load_pdptrs(vcpu
, vcpu
->arch
.walk_mmu
, vcpu
->arch
.cr3
))
609 if (cr4
& X86_CR4_VMXE
)
612 kvm_x86_ops
->set_cr4(vcpu
, cr4
);
614 if ((cr4
^ old_cr4
) & pdptr_bits
)
615 kvm_mmu_reset_context(vcpu
);
617 if ((cr4
^ old_cr4
) & X86_CR4_OSXSAVE
)
622 EXPORT_SYMBOL_GPL(kvm_set_cr4
);
624 int kvm_set_cr3(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
626 if (cr3
== vcpu
->arch
.cr3
&& !pdptrs_changed(vcpu
)) {
627 kvm_mmu_sync_roots(vcpu
);
628 kvm_mmu_flush_tlb(vcpu
);
632 if (is_long_mode(vcpu
)) {
633 if (cr3
& CR3_L_MODE_RESERVED_BITS
)
637 if (cr3
& CR3_PAE_RESERVED_BITS
)
639 if (is_paging(vcpu
) &&
640 !load_pdptrs(vcpu
, vcpu
->arch
.walk_mmu
, cr3
))
644 * We don't check reserved bits in nonpae mode, because
645 * this isn't enforced, and VMware depends on this.
650 * Does the new cr3 value map to physical memory? (Note, we
651 * catch an invalid cr3 even in real-mode, because it would
652 * cause trouble later on when we turn on paging anyway.)
654 * A real CPU would silently accept an invalid cr3 and would
655 * attempt to use it - with largely undefined (and often hard
656 * to debug) behavior on the guest side.
658 if (unlikely(!gfn_to_memslot(vcpu
->kvm
, cr3
>> PAGE_SHIFT
)))
660 vcpu
->arch
.cr3
= cr3
;
661 vcpu
->arch
.mmu
.new_cr3(vcpu
);
664 EXPORT_SYMBOL_GPL(kvm_set_cr3
);
666 int __kvm_set_cr8(struct kvm_vcpu
*vcpu
, unsigned long cr8
)
668 if (cr8
& CR8_RESERVED_BITS
)
670 if (irqchip_in_kernel(vcpu
->kvm
))
671 kvm_lapic_set_tpr(vcpu
, cr8
);
673 vcpu
->arch
.cr8
= cr8
;
677 void kvm_set_cr8(struct kvm_vcpu
*vcpu
, unsigned long cr8
)
679 if (__kvm_set_cr8(vcpu
, cr8
))
680 kvm_inject_gp(vcpu
, 0);
682 EXPORT_SYMBOL_GPL(kvm_set_cr8
);
684 unsigned long kvm_get_cr8(struct kvm_vcpu
*vcpu
)
686 if (irqchip_in_kernel(vcpu
->kvm
))
687 return kvm_lapic_get_cr8(vcpu
);
689 return vcpu
->arch
.cr8
;
691 EXPORT_SYMBOL_GPL(kvm_get_cr8
);
693 static int __kvm_set_dr(struct kvm_vcpu
*vcpu
, int dr
, unsigned long val
)
697 vcpu
->arch
.db
[dr
] = val
;
698 if (!(vcpu
->guest_debug
& KVM_GUESTDBG_USE_HW_BP
))
699 vcpu
->arch
.eff_db
[dr
] = val
;
702 if (kvm_read_cr4_bits(vcpu
, X86_CR4_DE
))
706 if (val
& 0xffffffff00000000ULL
)
708 vcpu
->arch
.dr6
= (val
& DR6_VOLATILE
) | DR6_FIXED_1
;
711 if (kvm_read_cr4_bits(vcpu
, X86_CR4_DE
))
715 if (val
& 0xffffffff00000000ULL
)
717 vcpu
->arch
.dr7
= (val
& DR7_VOLATILE
) | DR7_FIXED_1
;
718 if (!(vcpu
->guest_debug
& KVM_GUESTDBG_USE_HW_BP
)) {
719 kvm_x86_ops
->set_dr7(vcpu
, vcpu
->arch
.dr7
);
720 vcpu
->arch
.switch_db_regs
= (val
& DR7_BP_EN_MASK
);
728 int kvm_set_dr(struct kvm_vcpu
*vcpu
, int dr
, unsigned long val
)
732 res
= __kvm_set_dr(vcpu
, dr
, val
);
734 kvm_queue_exception(vcpu
, UD_VECTOR
);
736 kvm_inject_gp(vcpu
, 0);
740 EXPORT_SYMBOL_GPL(kvm_set_dr
);
742 static int _kvm_get_dr(struct kvm_vcpu
*vcpu
, int dr
, unsigned long *val
)
746 *val
= vcpu
->arch
.db
[dr
];
749 if (kvm_read_cr4_bits(vcpu
, X86_CR4_DE
))
753 *val
= vcpu
->arch
.dr6
;
756 if (kvm_read_cr4_bits(vcpu
, X86_CR4_DE
))
760 *val
= vcpu
->arch
.dr7
;
767 int kvm_get_dr(struct kvm_vcpu
*vcpu
, int dr
, unsigned long *val
)
769 if (_kvm_get_dr(vcpu
, dr
, val
)) {
770 kvm_queue_exception(vcpu
, UD_VECTOR
);
775 EXPORT_SYMBOL_GPL(kvm_get_dr
);
778 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
779 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
781 * This list is modified at module load time to reflect the
782 * capabilities of the host cpu. This capabilities test skips MSRs that are
783 * kvm-specific. Those are put in the beginning of the list.
786 #define KVM_SAVE_MSRS_BEGIN 8
787 static u32 msrs_to_save
[] = {
788 MSR_KVM_SYSTEM_TIME
, MSR_KVM_WALL_CLOCK
,
789 MSR_KVM_SYSTEM_TIME_NEW
, MSR_KVM_WALL_CLOCK_NEW
,
790 HV_X64_MSR_GUEST_OS_ID
, HV_X64_MSR_HYPERCALL
,
791 HV_X64_MSR_APIC_ASSIST_PAGE
, MSR_KVM_ASYNC_PF_EN
,
792 MSR_IA32_SYSENTER_CS
, MSR_IA32_SYSENTER_ESP
, MSR_IA32_SYSENTER_EIP
,
795 MSR_CSTAR
, MSR_KERNEL_GS_BASE
, MSR_SYSCALL_MASK
, MSR_LSTAR
,
797 MSR_IA32_TSC
, MSR_IA32_CR_PAT
, MSR_VM_HSAVE_PA
800 static unsigned num_msrs_to_save
;
802 static u32 emulated_msrs
[] = {
803 MSR_IA32_MISC_ENABLE
,
808 static int set_efer(struct kvm_vcpu
*vcpu
, u64 efer
)
810 u64 old_efer
= vcpu
->arch
.efer
;
812 if (efer
& efer_reserved_bits
)
816 && (vcpu
->arch
.efer
& EFER_LME
) != (efer
& EFER_LME
))
819 if (efer
& EFER_FFXSR
) {
820 struct kvm_cpuid_entry2
*feat
;
822 feat
= kvm_find_cpuid_entry(vcpu
, 0x80000001, 0);
823 if (!feat
|| !(feat
->edx
& bit(X86_FEATURE_FXSR_OPT
)))
827 if (efer
& EFER_SVME
) {
828 struct kvm_cpuid_entry2
*feat
;
830 feat
= kvm_find_cpuid_entry(vcpu
, 0x80000001, 0);
831 if (!feat
|| !(feat
->ecx
& bit(X86_FEATURE_SVM
)))
836 efer
|= vcpu
->arch
.efer
& EFER_LMA
;
838 kvm_x86_ops
->set_efer(vcpu
, efer
);
840 vcpu
->arch
.mmu
.base_role
.nxe
= (efer
& EFER_NX
) && !tdp_enabled
;
842 /* Update reserved bits */
843 if ((efer
^ old_efer
) & EFER_NX
)
844 kvm_mmu_reset_context(vcpu
);
849 void kvm_enable_efer_bits(u64 mask
)
851 efer_reserved_bits
&= ~mask
;
853 EXPORT_SYMBOL_GPL(kvm_enable_efer_bits
);
857 * Writes msr value into into the appropriate "register".
858 * Returns 0 on success, non-0 otherwise.
859 * Assumes vcpu_load() was already called.
861 int kvm_set_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64 data
)
863 return kvm_x86_ops
->set_msr(vcpu
, msr_index
, data
);
867 * Adapt set_msr() to msr_io()'s calling convention
869 static int do_set_msr(struct kvm_vcpu
*vcpu
, unsigned index
, u64
*data
)
871 return kvm_set_msr(vcpu
, index
, *data
);
874 static void kvm_write_wall_clock(struct kvm
*kvm
, gpa_t wall_clock
)
878 struct pvclock_wall_clock wc
;
879 struct timespec boot
;
884 r
= kvm_read_guest(kvm
, wall_clock
, &version
, sizeof(version
));
889 ++version
; /* first time write, random junk */
893 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
896 * The guest calculates current wall clock time by adding
897 * system time (updated by kvm_guest_time_update below) to the
898 * wall clock specified here. guest system time equals host
899 * system time for us, thus we must fill in host boot time here.
903 wc
.sec
= boot
.tv_sec
;
904 wc
.nsec
= boot
.tv_nsec
;
905 wc
.version
= version
;
907 kvm_write_guest(kvm
, wall_clock
, &wc
, sizeof(wc
));
910 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
913 static uint32_t div_frac(uint32_t dividend
, uint32_t divisor
)
915 uint32_t quotient
, remainder
;
917 /* Don't try to replace with do_div(), this one calculates
918 * "(dividend << 32) / divisor" */
920 : "=a" (quotient
), "=d" (remainder
)
921 : "0" (0), "1" (dividend
), "r" (divisor
) );
925 static void kvm_get_time_scale(uint32_t scaled_khz
, uint32_t base_khz
,
926 s8
*pshift
, u32
*pmultiplier
)
933 tps64
= base_khz
* 1000LL;
934 scaled64
= scaled_khz
* 1000LL;
935 while (tps64
> scaled64
*2 || tps64
& 0xffffffff00000000ULL
) {
940 tps32
= (uint32_t)tps64
;
941 while (tps32
<= scaled64
|| scaled64
& 0xffffffff00000000ULL
) {
942 if (scaled64
& 0xffffffff00000000ULL
|| tps32
& 0x80000000)
950 *pmultiplier
= div_frac(scaled64
, tps32
);
952 pr_debug("%s: base_khz %u => %u, shift %d, mul %u\n",
953 __func__
, base_khz
, scaled_khz
, shift
, *pmultiplier
);
956 static inline u64
get_kernel_ns(void)
960 WARN_ON(preemptible());
962 monotonic_to_bootbased(&ts
);
963 return timespec_to_ns(&ts
);
966 static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz
);
967 unsigned long max_tsc_khz
;
969 static inline int kvm_tsc_changes_freq(void)
972 int ret
= !boot_cpu_has(X86_FEATURE_CONSTANT_TSC
) &&
973 cpufreq_quick_get(cpu
) != 0;
978 static inline u64
nsec_to_cycles(u64 nsec
)
982 WARN_ON(preemptible());
983 if (kvm_tsc_changes_freq())
984 printk_once(KERN_WARNING
985 "kvm: unreliable cycle conversion on adjustable rate TSC\n");
986 ret
= nsec
* __get_cpu_var(cpu_tsc_khz
);
987 do_div(ret
, USEC_PER_SEC
);
991 static void kvm_arch_set_tsc_khz(struct kvm
*kvm
, u32 this_tsc_khz
)
993 /* Compute a scale to convert nanoseconds in TSC cycles */
994 kvm_get_time_scale(this_tsc_khz
, NSEC_PER_SEC
/ 1000,
995 &kvm
->arch
.virtual_tsc_shift
,
996 &kvm
->arch
.virtual_tsc_mult
);
997 kvm
->arch
.virtual_tsc_khz
= this_tsc_khz
;
1000 static u64
compute_guest_tsc(struct kvm_vcpu
*vcpu
, s64 kernel_ns
)
1002 u64 tsc
= pvclock_scale_delta(kernel_ns
-vcpu
->arch
.last_tsc_nsec
,
1003 vcpu
->kvm
->arch
.virtual_tsc_mult
,
1004 vcpu
->kvm
->arch
.virtual_tsc_shift
);
1005 tsc
+= vcpu
->arch
.last_tsc_write
;
1009 void kvm_write_tsc(struct kvm_vcpu
*vcpu
, u64 data
)
1011 struct kvm
*kvm
= vcpu
->kvm
;
1012 u64 offset
, ns
, elapsed
;
1013 unsigned long flags
;
1016 spin_lock_irqsave(&kvm
->arch
.tsc_write_lock
, flags
);
1017 offset
= data
- native_read_tsc();
1018 ns
= get_kernel_ns();
1019 elapsed
= ns
- kvm
->arch
.last_tsc_nsec
;
1020 sdiff
= data
- kvm
->arch
.last_tsc_write
;
1025 * Special case: close write to TSC within 5 seconds of
1026 * another CPU is interpreted as an attempt to synchronize
1027 * The 5 seconds is to accomodate host load / swapping as
1028 * well as any reset of TSC during the boot process.
1030 * In that case, for a reliable TSC, we can match TSC offsets,
1031 * or make a best guest using elapsed value.
1033 if (sdiff
< nsec_to_cycles(5ULL * NSEC_PER_SEC
) &&
1034 elapsed
< 5ULL * NSEC_PER_SEC
) {
1035 if (!check_tsc_unstable()) {
1036 offset
= kvm
->arch
.last_tsc_offset
;
1037 pr_debug("kvm: matched tsc offset for %llu\n", data
);
1039 u64 delta
= nsec_to_cycles(elapsed
);
1041 pr_debug("kvm: adjusted tsc offset by %llu\n", delta
);
1043 ns
= kvm
->arch
.last_tsc_nsec
;
1045 kvm
->arch
.last_tsc_nsec
= ns
;
1046 kvm
->arch
.last_tsc_write
= data
;
1047 kvm
->arch
.last_tsc_offset
= offset
;
1048 kvm_x86_ops
->write_tsc_offset(vcpu
, offset
);
1049 spin_unlock_irqrestore(&kvm
->arch
.tsc_write_lock
, flags
);
1051 /* Reset of TSC must disable overshoot protection below */
1052 vcpu
->arch
.hv_clock
.tsc_timestamp
= 0;
1053 vcpu
->arch
.last_tsc_write
= data
;
1054 vcpu
->arch
.last_tsc_nsec
= ns
;
1056 EXPORT_SYMBOL_GPL(kvm_write_tsc
);
1058 static int kvm_guest_time_update(struct kvm_vcpu
*v
)
1060 unsigned long flags
;
1061 struct kvm_vcpu_arch
*vcpu
= &v
->arch
;
1063 unsigned long this_tsc_khz
;
1064 s64 kernel_ns
, max_kernel_ns
;
1067 /* Keep irq disabled to prevent changes to the clock */
1068 local_irq_save(flags
);
1069 kvm_get_msr(v
, MSR_IA32_TSC
, &tsc_timestamp
);
1070 kernel_ns
= get_kernel_ns();
1071 this_tsc_khz
= __get_cpu_var(cpu_tsc_khz
);
1073 if (unlikely(this_tsc_khz
== 0)) {
1074 local_irq_restore(flags
);
1075 kvm_make_request(KVM_REQ_CLOCK_UPDATE
, v
);
1080 * We may have to catch up the TSC to match elapsed wall clock
1081 * time for two reasons, even if kvmclock is used.
1082 * 1) CPU could have been running below the maximum TSC rate
1083 * 2) Broken TSC compensation resets the base at each VCPU
1084 * entry to avoid unknown leaps of TSC even when running
1085 * again on the same CPU. This may cause apparent elapsed
1086 * time to disappear, and the guest to stand still or run
1089 if (vcpu
->tsc_catchup
) {
1090 u64 tsc
= compute_guest_tsc(v
, kernel_ns
);
1091 if (tsc
> tsc_timestamp
) {
1092 kvm_x86_ops
->adjust_tsc_offset(v
, tsc
- tsc_timestamp
);
1093 tsc_timestamp
= tsc
;
1097 local_irq_restore(flags
);
1099 if (!vcpu
->time_page
)
1103 * Time as measured by the TSC may go backwards when resetting the base
1104 * tsc_timestamp. The reason for this is that the TSC resolution is
1105 * higher than the resolution of the other clock scales. Thus, many
1106 * possible measurments of the TSC correspond to one measurement of any
1107 * other clock, and so a spread of values is possible. This is not a
1108 * problem for the computation of the nanosecond clock; with TSC rates
1109 * around 1GHZ, there can only be a few cycles which correspond to one
1110 * nanosecond value, and any path through this code will inevitably
1111 * take longer than that. However, with the kernel_ns value itself,
1112 * the precision may be much lower, down to HZ granularity. If the
1113 * first sampling of TSC against kernel_ns ends in the low part of the
1114 * range, and the second in the high end of the range, we can get:
1116 * (TSC - offset_low) * S + kns_old > (TSC - offset_high) * S + kns_new
1118 * As the sampling errors potentially range in the thousands of cycles,
1119 * it is possible such a time value has already been observed by the
1120 * guest. To protect against this, we must compute the system time as
1121 * observed by the guest and ensure the new system time is greater.
1124 if (vcpu
->hv_clock
.tsc_timestamp
&& vcpu
->last_guest_tsc
) {
1125 max_kernel_ns
= vcpu
->last_guest_tsc
-
1126 vcpu
->hv_clock
.tsc_timestamp
;
1127 max_kernel_ns
= pvclock_scale_delta(max_kernel_ns
,
1128 vcpu
->hv_clock
.tsc_to_system_mul
,
1129 vcpu
->hv_clock
.tsc_shift
);
1130 max_kernel_ns
+= vcpu
->last_kernel_ns
;
1133 if (unlikely(vcpu
->hw_tsc_khz
!= this_tsc_khz
)) {
1134 kvm_get_time_scale(NSEC_PER_SEC
/ 1000, this_tsc_khz
,
1135 &vcpu
->hv_clock
.tsc_shift
,
1136 &vcpu
->hv_clock
.tsc_to_system_mul
);
1137 vcpu
->hw_tsc_khz
= this_tsc_khz
;
1140 if (max_kernel_ns
> kernel_ns
)
1141 kernel_ns
= max_kernel_ns
;
1143 /* With all the info we got, fill in the values */
1144 vcpu
->hv_clock
.tsc_timestamp
= tsc_timestamp
;
1145 vcpu
->hv_clock
.system_time
= kernel_ns
+ v
->kvm
->arch
.kvmclock_offset
;
1146 vcpu
->last_kernel_ns
= kernel_ns
;
1147 vcpu
->last_guest_tsc
= tsc_timestamp
;
1148 vcpu
->hv_clock
.flags
= 0;
1151 * The interface expects us to write an even number signaling that the
1152 * update is finished. Since the guest won't see the intermediate
1153 * state, we just increase by 2 at the end.
1155 vcpu
->hv_clock
.version
+= 2;
1157 shared_kaddr
= kmap_atomic(vcpu
->time_page
, KM_USER0
);
1159 memcpy(shared_kaddr
+ vcpu
->time_offset
, &vcpu
->hv_clock
,
1160 sizeof(vcpu
->hv_clock
));
1162 kunmap_atomic(shared_kaddr
, KM_USER0
);
1164 mark_page_dirty(v
->kvm
, vcpu
->time
>> PAGE_SHIFT
);
1168 static bool msr_mtrr_valid(unsigned msr
)
1171 case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR
- 1:
1172 case MSR_MTRRfix64K_00000
:
1173 case MSR_MTRRfix16K_80000
:
1174 case MSR_MTRRfix16K_A0000
:
1175 case MSR_MTRRfix4K_C0000
:
1176 case MSR_MTRRfix4K_C8000
:
1177 case MSR_MTRRfix4K_D0000
:
1178 case MSR_MTRRfix4K_D8000
:
1179 case MSR_MTRRfix4K_E0000
:
1180 case MSR_MTRRfix4K_E8000
:
1181 case MSR_MTRRfix4K_F0000
:
1182 case MSR_MTRRfix4K_F8000
:
1183 case MSR_MTRRdefType
:
1184 case MSR_IA32_CR_PAT
:
1192 static bool valid_pat_type(unsigned t
)
1194 return t
< 8 && (1 << t
) & 0xf3; /* 0, 1, 4, 5, 6, 7 */
1197 static bool valid_mtrr_type(unsigned t
)
1199 return t
< 8 && (1 << t
) & 0x73; /* 0, 1, 4, 5, 6 */
1202 static bool mtrr_valid(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
1206 if (!msr_mtrr_valid(msr
))
1209 if (msr
== MSR_IA32_CR_PAT
) {
1210 for (i
= 0; i
< 8; i
++)
1211 if (!valid_pat_type((data
>> (i
* 8)) & 0xff))
1214 } else if (msr
== MSR_MTRRdefType
) {
1217 return valid_mtrr_type(data
& 0xff);
1218 } else if (msr
>= MSR_MTRRfix64K_00000
&& msr
<= MSR_MTRRfix4K_F8000
) {
1219 for (i
= 0; i
< 8 ; i
++)
1220 if (!valid_mtrr_type((data
>> (i
* 8)) & 0xff))
1225 /* variable MTRRs */
1226 return valid_mtrr_type(data
& 0xff);
1229 static int set_msr_mtrr(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
1231 u64
*p
= (u64
*)&vcpu
->arch
.mtrr_state
.fixed_ranges
;
1233 if (!mtrr_valid(vcpu
, msr
, data
))
1236 if (msr
== MSR_MTRRdefType
) {
1237 vcpu
->arch
.mtrr_state
.def_type
= data
;
1238 vcpu
->arch
.mtrr_state
.enabled
= (data
& 0xc00) >> 10;
1239 } else if (msr
== MSR_MTRRfix64K_00000
)
1241 else if (msr
== MSR_MTRRfix16K_80000
|| msr
== MSR_MTRRfix16K_A0000
)
1242 p
[1 + msr
- MSR_MTRRfix16K_80000
] = data
;
1243 else if (msr
>= MSR_MTRRfix4K_C0000
&& msr
<= MSR_MTRRfix4K_F8000
)
1244 p
[3 + msr
- MSR_MTRRfix4K_C0000
] = data
;
1245 else if (msr
== MSR_IA32_CR_PAT
)
1246 vcpu
->arch
.pat
= data
;
1247 else { /* Variable MTRRs */
1248 int idx
, is_mtrr_mask
;
1251 idx
= (msr
- 0x200) / 2;
1252 is_mtrr_mask
= msr
- 0x200 - 2 * idx
;
1255 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].base_lo
;
1258 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].mask_lo
;
1262 kvm_mmu_reset_context(vcpu
);
1266 static int set_msr_mce(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
1268 u64 mcg_cap
= vcpu
->arch
.mcg_cap
;
1269 unsigned bank_num
= mcg_cap
& 0xff;
1272 case MSR_IA32_MCG_STATUS
:
1273 vcpu
->arch
.mcg_status
= data
;
1275 case MSR_IA32_MCG_CTL
:
1276 if (!(mcg_cap
& MCG_CTL_P
))
1278 if (data
!= 0 && data
!= ~(u64
)0)
1280 vcpu
->arch
.mcg_ctl
= data
;
1283 if (msr
>= MSR_IA32_MC0_CTL
&&
1284 msr
< MSR_IA32_MC0_CTL
+ 4 * bank_num
) {
1285 u32 offset
= msr
- MSR_IA32_MC0_CTL
;
1286 /* only 0 or all 1s can be written to IA32_MCi_CTL
1287 * some Linux kernels though clear bit 10 in bank 4 to
1288 * workaround a BIOS/GART TBL issue on AMD K8s, ignore
1289 * this to avoid an uncatched #GP in the guest
1291 if ((offset
& 0x3) == 0 &&
1292 data
!= 0 && (data
| (1 << 10)) != ~(u64
)0)
1294 vcpu
->arch
.mce_banks
[offset
] = data
;
1302 static int xen_hvm_config(struct kvm_vcpu
*vcpu
, u64 data
)
1304 struct kvm
*kvm
= vcpu
->kvm
;
1305 int lm
= is_long_mode(vcpu
);
1306 u8
*blob_addr
= lm
? (u8
*)(long)kvm
->arch
.xen_hvm_config
.blob_addr_64
1307 : (u8
*)(long)kvm
->arch
.xen_hvm_config
.blob_addr_32
;
1308 u8 blob_size
= lm
? kvm
->arch
.xen_hvm_config
.blob_size_64
1309 : kvm
->arch
.xen_hvm_config
.blob_size_32
;
1310 u32 page_num
= data
& ~PAGE_MASK
;
1311 u64 page_addr
= data
& PAGE_MASK
;
1316 if (page_num
>= blob_size
)
1319 page
= kzalloc(PAGE_SIZE
, GFP_KERNEL
);
1323 if (copy_from_user(page
, blob_addr
+ (page_num
* PAGE_SIZE
), PAGE_SIZE
))
1325 if (kvm_write_guest(kvm
, page_addr
, page
, PAGE_SIZE
))
1334 static bool kvm_hv_hypercall_enabled(struct kvm
*kvm
)
1336 return kvm
->arch
.hv_hypercall
& HV_X64_MSR_HYPERCALL_ENABLE
;
1339 static bool kvm_hv_msr_partition_wide(u32 msr
)
1343 case HV_X64_MSR_GUEST_OS_ID
:
1344 case HV_X64_MSR_HYPERCALL
:
1352 static int set_msr_hyperv_pw(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
1354 struct kvm
*kvm
= vcpu
->kvm
;
1357 case HV_X64_MSR_GUEST_OS_ID
:
1358 kvm
->arch
.hv_guest_os_id
= data
;
1359 /* setting guest os id to zero disables hypercall page */
1360 if (!kvm
->arch
.hv_guest_os_id
)
1361 kvm
->arch
.hv_hypercall
&= ~HV_X64_MSR_HYPERCALL_ENABLE
;
1363 case HV_X64_MSR_HYPERCALL
: {
1368 /* if guest os id is not set hypercall should remain disabled */
1369 if (!kvm
->arch
.hv_guest_os_id
)
1371 if (!(data
& HV_X64_MSR_HYPERCALL_ENABLE
)) {
1372 kvm
->arch
.hv_hypercall
= data
;
1375 gfn
= data
>> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT
;
1376 addr
= gfn_to_hva(kvm
, gfn
);
1377 if (kvm_is_error_hva(addr
))
1379 kvm_x86_ops
->patch_hypercall(vcpu
, instructions
);
1380 ((unsigned char *)instructions
)[3] = 0xc3; /* ret */
1381 if (copy_to_user((void __user
*)addr
, instructions
, 4))
1383 kvm
->arch
.hv_hypercall
= data
;
1387 pr_unimpl(vcpu
, "HYPER-V unimplemented wrmsr: 0x%x "
1388 "data 0x%llx\n", msr
, data
);
1394 static int set_msr_hyperv(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
1397 case HV_X64_MSR_APIC_ASSIST_PAGE
: {
1400 if (!(data
& HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE
)) {
1401 vcpu
->arch
.hv_vapic
= data
;
1404 addr
= gfn_to_hva(vcpu
->kvm
, data
>>
1405 HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT
);
1406 if (kvm_is_error_hva(addr
))
1408 if (clear_user((void __user
*)addr
, PAGE_SIZE
))
1410 vcpu
->arch
.hv_vapic
= data
;
1413 case HV_X64_MSR_EOI
:
1414 return kvm_hv_vapic_msr_write(vcpu
, APIC_EOI
, data
);
1415 case HV_X64_MSR_ICR
:
1416 return kvm_hv_vapic_msr_write(vcpu
, APIC_ICR
, data
);
1417 case HV_X64_MSR_TPR
:
1418 return kvm_hv_vapic_msr_write(vcpu
, APIC_TASKPRI
, data
);
1420 pr_unimpl(vcpu
, "HYPER-V unimplemented wrmsr: 0x%x "
1421 "data 0x%llx\n", msr
, data
);
1428 static int kvm_pv_enable_async_pf(struct kvm_vcpu
*vcpu
, u64 data
)
1430 gpa_t gpa
= data
& ~0x3f;
1432 /* Bits 2:5 are resrved, Should be zero */
1436 vcpu
->arch
.apf
.msr_val
= data
;
1438 if (!(data
& KVM_ASYNC_PF_ENABLED
)) {
1439 kvm_clear_async_pf_completion_queue(vcpu
);
1440 kvm_async_pf_hash_reset(vcpu
);
1444 if (kvm_gfn_to_hva_cache_init(vcpu
->kvm
, &vcpu
->arch
.apf
.data
, gpa
))
1447 vcpu
->arch
.apf
.send_user_only
= !(data
& KVM_ASYNC_PF_SEND_ALWAYS
);
1448 kvm_async_pf_wakeup_all(vcpu
);
1452 int kvm_set_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
1456 return set_efer(vcpu
, data
);
1458 data
&= ~(u64
)0x40; /* ignore flush filter disable */
1459 data
&= ~(u64
)0x100; /* ignore ignne emulation enable */
1461 pr_unimpl(vcpu
, "unimplemented HWCR wrmsr: 0x%llx\n",
1466 case MSR_FAM10H_MMIO_CONF_BASE
:
1468 pr_unimpl(vcpu
, "unimplemented MMIO_CONF_BASE wrmsr: "
1473 case MSR_AMD64_NB_CFG
:
1475 case MSR_IA32_DEBUGCTLMSR
:
1477 /* We support the non-activated case already */
1479 } else if (data
& ~(DEBUGCTLMSR_LBR
| DEBUGCTLMSR_BTF
)) {
1480 /* Values other than LBR and BTF are vendor-specific,
1481 thus reserved and should throw a #GP */
1484 pr_unimpl(vcpu
, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
1487 case MSR_IA32_UCODE_REV
:
1488 case MSR_IA32_UCODE_WRITE
:
1489 case MSR_VM_HSAVE_PA
:
1490 case MSR_AMD64_PATCH_LOADER
:
1492 case 0x200 ... 0x2ff:
1493 return set_msr_mtrr(vcpu
, msr
, data
);
1494 case MSR_IA32_APICBASE
:
1495 kvm_set_apic_base(vcpu
, data
);
1497 case APIC_BASE_MSR
... APIC_BASE_MSR
+ 0x3ff:
1498 return kvm_x2apic_msr_write(vcpu
, msr
, data
);
1499 case MSR_IA32_MISC_ENABLE
:
1500 vcpu
->arch
.ia32_misc_enable_msr
= data
;
1502 case MSR_KVM_WALL_CLOCK_NEW
:
1503 case MSR_KVM_WALL_CLOCK
:
1504 vcpu
->kvm
->arch
.wall_clock
= data
;
1505 kvm_write_wall_clock(vcpu
->kvm
, data
);
1507 case MSR_KVM_SYSTEM_TIME_NEW
:
1508 case MSR_KVM_SYSTEM_TIME
: {
1509 if (vcpu
->arch
.time_page
) {
1510 kvm_release_page_dirty(vcpu
->arch
.time_page
);
1511 vcpu
->arch
.time_page
= NULL
;
1514 vcpu
->arch
.time
= data
;
1515 kvm_make_request(KVM_REQ_CLOCK_UPDATE
, vcpu
);
1517 /* we verify if the enable bit is set... */
1521 /* ...but clean it before doing the actual write */
1522 vcpu
->arch
.time_offset
= data
& ~(PAGE_MASK
| 1);
1524 vcpu
->arch
.time_page
=
1525 gfn_to_page(vcpu
->kvm
, data
>> PAGE_SHIFT
);
1527 if (is_error_page(vcpu
->arch
.time_page
)) {
1528 kvm_release_page_clean(vcpu
->arch
.time_page
);
1529 vcpu
->arch
.time_page
= NULL
;
1533 case MSR_KVM_ASYNC_PF_EN
:
1534 if (kvm_pv_enable_async_pf(vcpu
, data
))
1537 case MSR_IA32_MCG_CTL
:
1538 case MSR_IA32_MCG_STATUS
:
1539 case MSR_IA32_MC0_CTL
... MSR_IA32_MC0_CTL
+ 4 * KVM_MAX_MCE_BANKS
- 1:
1540 return set_msr_mce(vcpu
, msr
, data
);
1542 /* Performance counters are not protected by a CPUID bit,
1543 * so we should check all of them in the generic path for the sake of
1544 * cross vendor migration.
1545 * Writing a zero into the event select MSRs disables them,
1546 * which we perfectly emulate ;-). Any other value should be at least
1547 * reported, some guests depend on them.
1549 case MSR_P6_EVNTSEL0
:
1550 case MSR_P6_EVNTSEL1
:
1551 case MSR_K7_EVNTSEL0
:
1552 case MSR_K7_EVNTSEL1
:
1553 case MSR_K7_EVNTSEL2
:
1554 case MSR_K7_EVNTSEL3
:
1556 pr_unimpl(vcpu
, "unimplemented perfctr wrmsr: "
1557 "0x%x data 0x%llx\n", msr
, data
);
1559 /* at least RHEL 4 unconditionally writes to the perfctr registers,
1560 * so we ignore writes to make it happy.
1562 case MSR_P6_PERFCTR0
:
1563 case MSR_P6_PERFCTR1
:
1564 case MSR_K7_PERFCTR0
:
1565 case MSR_K7_PERFCTR1
:
1566 case MSR_K7_PERFCTR2
:
1567 case MSR_K7_PERFCTR3
:
1568 pr_unimpl(vcpu
, "unimplemented perfctr wrmsr: "
1569 "0x%x data 0x%llx\n", msr
, data
);
1571 case MSR_K7_CLK_CTL
:
1573 * Ignore all writes to this no longer documented MSR.
1574 * Writes are only relevant for old K7 processors,
1575 * all pre-dating SVM, but a recommended workaround from
1576 * AMD for these chips. It is possible to speicify the
1577 * affected processor models on the command line, hence
1578 * the need to ignore the workaround.
1581 case HV_X64_MSR_GUEST_OS_ID
... HV_X64_MSR_SINT15
:
1582 if (kvm_hv_msr_partition_wide(msr
)) {
1584 mutex_lock(&vcpu
->kvm
->lock
);
1585 r
= set_msr_hyperv_pw(vcpu
, msr
, data
);
1586 mutex_unlock(&vcpu
->kvm
->lock
);
1589 return set_msr_hyperv(vcpu
, msr
, data
);
1592 if (msr
&& (msr
== vcpu
->kvm
->arch
.xen_hvm_config
.msr
))
1593 return xen_hvm_config(vcpu
, data
);
1595 pr_unimpl(vcpu
, "unhandled wrmsr: 0x%x data %llx\n",
1599 pr_unimpl(vcpu
, "ignored wrmsr: 0x%x data %llx\n",
1606 EXPORT_SYMBOL_GPL(kvm_set_msr_common
);
1610 * Reads an msr value (of 'msr_index') into 'pdata'.
1611 * Returns 0 on success, non-0 otherwise.
1612 * Assumes vcpu_load() was already called.
1614 int kvm_get_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64
*pdata
)
1616 return kvm_x86_ops
->get_msr(vcpu
, msr_index
, pdata
);
1619 static int get_msr_mtrr(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
1621 u64
*p
= (u64
*)&vcpu
->arch
.mtrr_state
.fixed_ranges
;
1623 if (!msr_mtrr_valid(msr
))
1626 if (msr
== MSR_MTRRdefType
)
1627 *pdata
= vcpu
->arch
.mtrr_state
.def_type
+
1628 (vcpu
->arch
.mtrr_state
.enabled
<< 10);
1629 else if (msr
== MSR_MTRRfix64K_00000
)
1631 else if (msr
== MSR_MTRRfix16K_80000
|| msr
== MSR_MTRRfix16K_A0000
)
1632 *pdata
= p
[1 + msr
- MSR_MTRRfix16K_80000
];
1633 else if (msr
>= MSR_MTRRfix4K_C0000
&& msr
<= MSR_MTRRfix4K_F8000
)
1634 *pdata
= p
[3 + msr
- MSR_MTRRfix4K_C0000
];
1635 else if (msr
== MSR_IA32_CR_PAT
)
1636 *pdata
= vcpu
->arch
.pat
;
1637 else { /* Variable MTRRs */
1638 int idx
, is_mtrr_mask
;
1641 idx
= (msr
- 0x200) / 2;
1642 is_mtrr_mask
= msr
- 0x200 - 2 * idx
;
1645 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].base_lo
;
1648 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].mask_lo
;
1655 static int get_msr_mce(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
1658 u64 mcg_cap
= vcpu
->arch
.mcg_cap
;
1659 unsigned bank_num
= mcg_cap
& 0xff;
1662 case MSR_IA32_P5_MC_ADDR
:
1663 case MSR_IA32_P5_MC_TYPE
:
1666 case MSR_IA32_MCG_CAP
:
1667 data
= vcpu
->arch
.mcg_cap
;
1669 case MSR_IA32_MCG_CTL
:
1670 if (!(mcg_cap
& MCG_CTL_P
))
1672 data
= vcpu
->arch
.mcg_ctl
;
1674 case MSR_IA32_MCG_STATUS
:
1675 data
= vcpu
->arch
.mcg_status
;
1678 if (msr
>= MSR_IA32_MC0_CTL
&&
1679 msr
< MSR_IA32_MC0_CTL
+ 4 * bank_num
) {
1680 u32 offset
= msr
- MSR_IA32_MC0_CTL
;
1681 data
= vcpu
->arch
.mce_banks
[offset
];
1690 static int get_msr_hyperv_pw(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
1693 struct kvm
*kvm
= vcpu
->kvm
;
1696 case HV_X64_MSR_GUEST_OS_ID
:
1697 data
= kvm
->arch
.hv_guest_os_id
;
1699 case HV_X64_MSR_HYPERCALL
:
1700 data
= kvm
->arch
.hv_hypercall
;
1703 pr_unimpl(vcpu
, "Hyper-V unhandled rdmsr: 0x%x\n", msr
);
1711 static int get_msr_hyperv(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
1716 case HV_X64_MSR_VP_INDEX
: {
1719 kvm_for_each_vcpu(r
, v
, vcpu
->kvm
)
1724 case HV_X64_MSR_EOI
:
1725 return kvm_hv_vapic_msr_read(vcpu
, APIC_EOI
, pdata
);
1726 case HV_X64_MSR_ICR
:
1727 return kvm_hv_vapic_msr_read(vcpu
, APIC_ICR
, pdata
);
1728 case HV_X64_MSR_TPR
:
1729 return kvm_hv_vapic_msr_read(vcpu
, APIC_TASKPRI
, pdata
);
1731 pr_unimpl(vcpu
, "Hyper-V unhandled rdmsr: 0x%x\n", msr
);
1738 int kvm_get_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
1743 case MSR_IA32_PLATFORM_ID
:
1744 case MSR_IA32_UCODE_REV
:
1745 case MSR_IA32_EBL_CR_POWERON
:
1746 case MSR_IA32_DEBUGCTLMSR
:
1747 case MSR_IA32_LASTBRANCHFROMIP
:
1748 case MSR_IA32_LASTBRANCHTOIP
:
1749 case MSR_IA32_LASTINTFROMIP
:
1750 case MSR_IA32_LASTINTTOIP
:
1753 case MSR_VM_HSAVE_PA
:
1754 case MSR_P6_PERFCTR0
:
1755 case MSR_P6_PERFCTR1
:
1756 case MSR_P6_EVNTSEL0
:
1757 case MSR_P6_EVNTSEL1
:
1758 case MSR_K7_EVNTSEL0
:
1759 case MSR_K7_PERFCTR0
:
1760 case MSR_K8_INT_PENDING_MSG
:
1761 case MSR_AMD64_NB_CFG
:
1762 case MSR_FAM10H_MMIO_CONF_BASE
:
1766 data
= 0x500 | KVM_NR_VAR_MTRR
;
1768 case 0x200 ... 0x2ff:
1769 return get_msr_mtrr(vcpu
, msr
, pdata
);
1770 case 0xcd: /* fsb frequency */
1774 * MSR_EBC_FREQUENCY_ID
1775 * Conservative value valid for even the basic CPU models.
1776 * Models 0,1: 000 in bits 23:21 indicating a bus speed of
1777 * 100MHz, model 2 000 in bits 18:16 indicating 100MHz,
1778 * and 266MHz for model 3, or 4. Set Core Clock
1779 * Frequency to System Bus Frequency Ratio to 1 (bits
1780 * 31:24) even though these are only valid for CPU
1781 * models > 2, however guests may end up dividing or
1782 * multiplying by zero otherwise.
1784 case MSR_EBC_FREQUENCY_ID
:
1787 case MSR_IA32_APICBASE
:
1788 data
= kvm_get_apic_base(vcpu
);
1790 case APIC_BASE_MSR
... APIC_BASE_MSR
+ 0x3ff:
1791 return kvm_x2apic_msr_read(vcpu
, msr
, pdata
);
1793 case MSR_IA32_MISC_ENABLE
:
1794 data
= vcpu
->arch
.ia32_misc_enable_msr
;
1796 case MSR_IA32_PERF_STATUS
:
1797 /* TSC increment by tick */
1799 /* CPU multiplier */
1800 data
|= (((uint64_t)4ULL) << 40);
1803 data
= vcpu
->arch
.efer
;
1805 case MSR_KVM_WALL_CLOCK
:
1806 case MSR_KVM_WALL_CLOCK_NEW
:
1807 data
= vcpu
->kvm
->arch
.wall_clock
;
1809 case MSR_KVM_SYSTEM_TIME
:
1810 case MSR_KVM_SYSTEM_TIME_NEW
:
1811 data
= vcpu
->arch
.time
;
1813 case MSR_KVM_ASYNC_PF_EN
:
1814 data
= vcpu
->arch
.apf
.msr_val
;
1816 case MSR_IA32_P5_MC_ADDR
:
1817 case MSR_IA32_P5_MC_TYPE
:
1818 case MSR_IA32_MCG_CAP
:
1819 case MSR_IA32_MCG_CTL
:
1820 case MSR_IA32_MCG_STATUS
:
1821 case MSR_IA32_MC0_CTL
... MSR_IA32_MC0_CTL
+ 4 * KVM_MAX_MCE_BANKS
- 1:
1822 return get_msr_mce(vcpu
, msr
, pdata
);
1823 case MSR_K7_CLK_CTL
:
1825 * Provide expected ramp-up count for K7. All other
1826 * are set to zero, indicating minimum divisors for
1829 * This prevents guest kernels on AMD host with CPU
1830 * type 6, model 8 and higher from exploding due to
1831 * the rdmsr failing.
1835 case HV_X64_MSR_GUEST_OS_ID
... HV_X64_MSR_SINT15
:
1836 if (kvm_hv_msr_partition_wide(msr
)) {
1838 mutex_lock(&vcpu
->kvm
->lock
);
1839 r
= get_msr_hyperv_pw(vcpu
, msr
, pdata
);
1840 mutex_unlock(&vcpu
->kvm
->lock
);
1843 return get_msr_hyperv(vcpu
, msr
, pdata
);
1847 pr_unimpl(vcpu
, "unhandled rdmsr: 0x%x\n", msr
);
1850 pr_unimpl(vcpu
, "ignored rdmsr: 0x%x\n", msr
);
1858 EXPORT_SYMBOL_GPL(kvm_get_msr_common
);
1861 * Read or write a bunch of msrs. All parameters are kernel addresses.
1863 * @return number of msrs set successfully.
1865 static int __msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs
*msrs
,
1866 struct kvm_msr_entry
*entries
,
1867 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
1868 unsigned index
, u64
*data
))
1872 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
1873 for (i
= 0; i
< msrs
->nmsrs
; ++i
)
1874 if (do_msr(vcpu
, entries
[i
].index
, &entries
[i
].data
))
1876 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
1882 * Read or write a bunch of msrs. Parameters are user addresses.
1884 * @return number of msrs set successfully.
1886 static int msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs __user
*user_msrs
,
1887 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
1888 unsigned index
, u64
*data
),
1891 struct kvm_msrs msrs
;
1892 struct kvm_msr_entry
*entries
;
1897 if (copy_from_user(&msrs
, user_msrs
, sizeof msrs
))
1901 if (msrs
.nmsrs
>= MAX_IO_MSRS
)
1905 size
= sizeof(struct kvm_msr_entry
) * msrs
.nmsrs
;
1906 entries
= kmalloc(size
, GFP_KERNEL
);
1911 if (copy_from_user(entries
, user_msrs
->entries
, size
))
1914 r
= n
= __msr_io(vcpu
, &msrs
, entries
, do_msr
);
1919 if (writeback
&& copy_to_user(user_msrs
->entries
, entries
, size
))
1930 int kvm_dev_ioctl_check_extension(long ext
)
1935 case KVM_CAP_IRQCHIP
:
1937 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL
:
1938 case KVM_CAP_SET_TSS_ADDR
:
1939 case KVM_CAP_EXT_CPUID
:
1940 case KVM_CAP_CLOCKSOURCE
:
1942 case KVM_CAP_NOP_IO_DELAY
:
1943 case KVM_CAP_MP_STATE
:
1944 case KVM_CAP_SYNC_MMU
:
1945 case KVM_CAP_REINJECT_CONTROL
:
1946 case KVM_CAP_IRQ_INJECT_STATUS
:
1947 case KVM_CAP_ASSIGN_DEV_IRQ
:
1949 case KVM_CAP_IOEVENTFD
:
1951 case KVM_CAP_PIT_STATE2
:
1952 case KVM_CAP_SET_IDENTITY_MAP_ADDR
:
1953 case KVM_CAP_XEN_HVM
:
1954 case KVM_CAP_ADJUST_CLOCK
:
1955 case KVM_CAP_VCPU_EVENTS
:
1956 case KVM_CAP_HYPERV
:
1957 case KVM_CAP_HYPERV_VAPIC
:
1958 case KVM_CAP_HYPERV_SPIN
:
1959 case KVM_CAP_PCI_SEGMENT
:
1960 case KVM_CAP_DEBUGREGS
:
1961 case KVM_CAP_X86_ROBUST_SINGLESTEP
:
1963 case KVM_CAP_ASYNC_PF
:
1966 case KVM_CAP_COALESCED_MMIO
:
1967 r
= KVM_COALESCED_MMIO_PAGE_OFFSET
;
1970 r
= !kvm_x86_ops
->cpu_has_accelerated_tpr();
1972 case KVM_CAP_NR_VCPUS
:
1975 case KVM_CAP_NR_MEMSLOTS
:
1976 r
= KVM_MEMORY_SLOTS
;
1978 case KVM_CAP_PV_MMU
: /* obsolete */
1985 r
= KVM_MAX_MCE_BANKS
;
1998 long kvm_arch_dev_ioctl(struct file
*filp
,
1999 unsigned int ioctl
, unsigned long arg
)
2001 void __user
*argp
= (void __user
*)arg
;
2005 case KVM_GET_MSR_INDEX_LIST
: {
2006 struct kvm_msr_list __user
*user_msr_list
= argp
;
2007 struct kvm_msr_list msr_list
;
2011 if (copy_from_user(&msr_list
, user_msr_list
, sizeof msr_list
))
2014 msr_list
.nmsrs
= num_msrs_to_save
+ ARRAY_SIZE(emulated_msrs
);
2015 if (copy_to_user(user_msr_list
, &msr_list
, sizeof msr_list
))
2018 if (n
< msr_list
.nmsrs
)
2021 if (copy_to_user(user_msr_list
->indices
, &msrs_to_save
,
2022 num_msrs_to_save
* sizeof(u32
)))
2024 if (copy_to_user(user_msr_list
->indices
+ num_msrs_to_save
,
2026 ARRAY_SIZE(emulated_msrs
) * sizeof(u32
)))
2031 case KVM_GET_SUPPORTED_CPUID
: {
2032 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
2033 struct kvm_cpuid2 cpuid
;
2036 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
2038 r
= kvm_dev_ioctl_get_supported_cpuid(&cpuid
,
2039 cpuid_arg
->entries
);
2044 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
2049 case KVM_X86_GET_MCE_CAP_SUPPORTED
: {
2052 mce_cap
= KVM_MCE_CAP_SUPPORTED
;
2054 if (copy_to_user(argp
, &mce_cap
, sizeof mce_cap
))
2066 static void wbinvd_ipi(void *garbage
)
2071 static bool need_emulate_wbinvd(struct kvm_vcpu
*vcpu
)
2073 return vcpu
->kvm
->arch
.iommu_domain
&&
2074 !(vcpu
->kvm
->arch
.iommu_flags
& KVM_IOMMU_CACHE_COHERENCY
);
2077 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
2079 /* Address WBINVD may be executed by guest */
2080 if (need_emulate_wbinvd(vcpu
)) {
2081 if (kvm_x86_ops
->has_wbinvd_exit())
2082 cpumask_set_cpu(cpu
, vcpu
->arch
.wbinvd_dirty_mask
);
2083 else if (vcpu
->cpu
!= -1 && vcpu
->cpu
!= cpu
)
2084 smp_call_function_single(vcpu
->cpu
,
2085 wbinvd_ipi
, NULL
, 1);
2088 kvm_x86_ops
->vcpu_load(vcpu
, cpu
);
2089 if (unlikely(vcpu
->cpu
!= cpu
) || check_tsc_unstable()) {
2090 /* Make sure TSC doesn't go backwards */
2091 s64 tsc_delta
= !vcpu
->arch
.last_host_tsc
? 0 :
2092 native_read_tsc() - vcpu
->arch
.last_host_tsc
;
2094 mark_tsc_unstable("KVM discovered backwards TSC");
2095 if (check_tsc_unstable()) {
2096 kvm_x86_ops
->adjust_tsc_offset(vcpu
, -tsc_delta
);
2097 vcpu
->arch
.tsc_catchup
= 1;
2098 kvm_make_request(KVM_REQ_CLOCK_UPDATE
, vcpu
);
2100 if (vcpu
->cpu
!= cpu
)
2101 kvm_migrate_timers(vcpu
);
2106 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
)
2108 kvm_x86_ops
->vcpu_put(vcpu
);
2109 kvm_put_guest_fpu(vcpu
);
2110 vcpu
->arch
.last_host_tsc
= native_read_tsc();
2113 static int is_efer_nx(void)
2115 unsigned long long efer
= 0;
2117 rdmsrl_safe(MSR_EFER
, &efer
);
2118 return efer
& EFER_NX
;
2121 static void cpuid_fix_nx_cap(struct kvm_vcpu
*vcpu
)
2124 struct kvm_cpuid_entry2
*e
, *entry
;
2127 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
2128 e
= &vcpu
->arch
.cpuid_entries
[i
];
2129 if (e
->function
== 0x80000001) {
2134 if (entry
&& (entry
->edx
& (1 << 20)) && !is_efer_nx()) {
2135 entry
->edx
&= ~(1 << 20);
2136 printk(KERN_INFO
"kvm: guest NX capability removed\n");
2140 /* when an old userspace process fills a new kernel module */
2141 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu
*vcpu
,
2142 struct kvm_cpuid
*cpuid
,
2143 struct kvm_cpuid_entry __user
*entries
)
2146 struct kvm_cpuid_entry
*cpuid_entries
;
2149 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
2152 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry
) * cpuid
->nent
);
2156 if (copy_from_user(cpuid_entries
, entries
,
2157 cpuid
->nent
* sizeof(struct kvm_cpuid_entry
)))
2159 for (i
= 0; i
< cpuid
->nent
; i
++) {
2160 vcpu
->arch
.cpuid_entries
[i
].function
= cpuid_entries
[i
].function
;
2161 vcpu
->arch
.cpuid_entries
[i
].eax
= cpuid_entries
[i
].eax
;
2162 vcpu
->arch
.cpuid_entries
[i
].ebx
= cpuid_entries
[i
].ebx
;
2163 vcpu
->arch
.cpuid_entries
[i
].ecx
= cpuid_entries
[i
].ecx
;
2164 vcpu
->arch
.cpuid_entries
[i
].edx
= cpuid_entries
[i
].edx
;
2165 vcpu
->arch
.cpuid_entries
[i
].index
= 0;
2166 vcpu
->arch
.cpuid_entries
[i
].flags
= 0;
2167 vcpu
->arch
.cpuid_entries
[i
].padding
[0] = 0;
2168 vcpu
->arch
.cpuid_entries
[i
].padding
[1] = 0;
2169 vcpu
->arch
.cpuid_entries
[i
].padding
[2] = 0;
2171 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
2172 cpuid_fix_nx_cap(vcpu
);
2174 kvm_apic_set_version(vcpu
);
2175 kvm_x86_ops
->cpuid_update(vcpu
);
2179 vfree(cpuid_entries
);
2184 static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu
*vcpu
,
2185 struct kvm_cpuid2
*cpuid
,
2186 struct kvm_cpuid_entry2 __user
*entries
)
2191 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
2194 if (copy_from_user(&vcpu
->arch
.cpuid_entries
, entries
,
2195 cpuid
->nent
* sizeof(struct kvm_cpuid_entry2
)))
2197 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
2198 kvm_apic_set_version(vcpu
);
2199 kvm_x86_ops
->cpuid_update(vcpu
);
2207 static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu
*vcpu
,
2208 struct kvm_cpuid2
*cpuid
,
2209 struct kvm_cpuid_entry2 __user
*entries
)
2214 if (cpuid
->nent
< vcpu
->arch
.cpuid_nent
)
2217 if (copy_to_user(entries
, &vcpu
->arch
.cpuid_entries
,
2218 vcpu
->arch
.cpuid_nent
* sizeof(struct kvm_cpuid_entry2
)))
2223 cpuid
->nent
= vcpu
->arch
.cpuid_nent
;
2227 static void do_cpuid_1_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
2230 entry
->function
= function
;
2231 entry
->index
= index
;
2232 cpuid_count(entry
->function
, entry
->index
,
2233 &entry
->eax
, &entry
->ebx
, &entry
->ecx
, &entry
->edx
);
2237 #define F(x) bit(X86_FEATURE_##x)
2239 static void do_cpuid_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
2240 u32 index
, int *nent
, int maxnent
)
2242 unsigned f_nx
= is_efer_nx() ? F(NX
) : 0;
2243 #ifdef CONFIG_X86_64
2244 unsigned f_gbpages
= (kvm_x86_ops
->get_lpage_level() == PT_PDPE_LEVEL
)
2246 unsigned f_lm
= F(LM
);
2248 unsigned f_gbpages
= 0;
2251 unsigned f_rdtscp
= kvm_x86_ops
->rdtscp_supported() ? F(RDTSCP
) : 0;
2254 const u32 kvm_supported_word0_x86_features
=
2255 F(FPU
) | F(VME
) | F(DE
) | F(PSE
) |
2256 F(TSC
) | F(MSR
) | F(PAE
) | F(MCE
) |
2257 F(CX8
) | F(APIC
) | 0 /* Reserved */ | F(SEP
) |
2258 F(MTRR
) | F(PGE
) | F(MCA
) | F(CMOV
) |
2259 F(PAT
) | F(PSE36
) | 0 /* PSN */ | F(CLFLSH
) |
2260 0 /* Reserved, DS, ACPI */ | F(MMX
) |
2261 F(FXSR
) | F(XMM
) | F(XMM2
) | F(SELFSNOOP
) |
2262 0 /* HTT, TM, Reserved, PBE */;
2263 /* cpuid 0x80000001.edx */
2264 const u32 kvm_supported_word1_x86_features
=
2265 F(FPU
) | F(VME
) | F(DE
) | F(PSE
) |
2266 F(TSC
) | F(MSR
) | F(PAE
) | F(MCE
) |
2267 F(CX8
) | F(APIC
) | 0 /* Reserved */ | F(SYSCALL
) |
2268 F(MTRR
) | F(PGE
) | F(MCA
) | F(CMOV
) |
2269 F(PAT
) | F(PSE36
) | 0 /* Reserved */ |
2270 f_nx
| 0 /* Reserved */ | F(MMXEXT
) | F(MMX
) |
2271 F(FXSR
) | F(FXSR_OPT
) | f_gbpages
| f_rdtscp
|
2272 0 /* Reserved */ | f_lm
| F(3DNOWEXT
) | F(3DNOW
);
2274 const u32 kvm_supported_word4_x86_features
=
2275 F(XMM3
) | F(PCLMULQDQ
) | 0 /* DTES64, MONITOR */ |
2276 0 /* DS-CPL, VMX, SMX, EST */ |
2277 0 /* TM2 */ | F(SSSE3
) | 0 /* CNXT-ID */ | 0 /* Reserved */ |
2278 0 /* Reserved */ | F(CX16
) | 0 /* xTPR Update, PDCM */ |
2279 0 /* Reserved, DCA */ | F(XMM4_1
) |
2280 F(XMM4_2
) | F(X2APIC
) | F(MOVBE
) | F(POPCNT
) |
2281 0 /* Reserved*/ | F(AES
) | F(XSAVE
) | 0 /* OSXSAVE */ | F(AVX
) |
2283 /* cpuid 0x80000001.ecx */
2284 const u32 kvm_supported_word6_x86_features
=
2285 F(LAHF_LM
) | F(CMP_LEGACY
) | 0 /*SVM*/ | 0 /* ExtApicSpace */ |
2286 F(CR8_LEGACY
) | F(ABM
) | F(SSE4A
) | F(MISALIGNSSE
) |
2287 F(3DNOWPREFETCH
) | 0 /* OSVW */ | 0 /* IBS */ | F(XOP
) |
2288 0 /* SKINIT, WDT, LWP */ | F(FMA4
) | F(TBM
);
2290 /* all calls to cpuid_count() should be made on the same cpu */
2292 do_cpuid_1_ent(entry
, function
, index
);
2297 entry
->eax
= min(entry
->eax
, (u32
)0xd);
2300 entry
->edx
&= kvm_supported_word0_x86_features
;
2301 entry
->ecx
&= kvm_supported_word4_x86_features
;
2302 /* we support x2apic emulation even if host does not support
2303 * it since we emulate x2apic in software */
2304 entry
->ecx
|= F(X2APIC
);
2306 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
2307 * may return different values. This forces us to get_cpu() before
2308 * issuing the first command, and also to emulate this annoying behavior
2309 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
2311 int t
, times
= entry
->eax
& 0xff;
2313 entry
->flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
2314 entry
->flags
|= KVM_CPUID_FLAG_STATE_READ_NEXT
;
2315 for (t
= 1; t
< times
&& *nent
< maxnent
; ++t
) {
2316 do_cpuid_1_ent(&entry
[t
], function
, 0);
2317 entry
[t
].flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
2322 /* function 4 and 0xb have additional index. */
2326 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
2327 /* read more entries until cache_type is zero */
2328 for (i
= 1; *nent
< maxnent
; ++i
) {
2329 cache_type
= entry
[i
- 1].eax
& 0x1f;
2332 do_cpuid_1_ent(&entry
[i
], function
, i
);
2334 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
2342 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
2343 /* read more entries until level_type is zero */
2344 for (i
= 1; *nent
< maxnent
; ++i
) {
2345 level_type
= entry
[i
- 1].ecx
& 0xff00;
2348 do_cpuid_1_ent(&entry
[i
], function
, i
);
2350 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
2358 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
2359 for (i
= 1; *nent
< maxnent
; ++i
) {
2360 if (entry
[i
- 1].eax
== 0 && i
!= 2)
2362 do_cpuid_1_ent(&entry
[i
], function
, i
);
2364 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
2369 case KVM_CPUID_SIGNATURE
: {
2370 char signature
[12] = "KVMKVMKVM\0\0";
2371 u32
*sigptr
= (u32
*)signature
;
2373 entry
->ebx
= sigptr
[0];
2374 entry
->ecx
= sigptr
[1];
2375 entry
->edx
= sigptr
[2];
2378 case KVM_CPUID_FEATURES
:
2379 entry
->eax
= (1 << KVM_FEATURE_CLOCKSOURCE
) |
2380 (1 << KVM_FEATURE_NOP_IO_DELAY
) |
2381 (1 << KVM_FEATURE_CLOCKSOURCE2
) |
2382 (1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT
);
2388 entry
->eax
= min(entry
->eax
, 0x8000001a);
2391 entry
->edx
&= kvm_supported_word1_x86_features
;
2392 entry
->ecx
&= kvm_supported_word6_x86_features
;
2396 kvm_x86_ops
->set_supported_cpuid(function
, entry
);
2403 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2
*cpuid
,
2404 struct kvm_cpuid_entry2 __user
*entries
)
2406 struct kvm_cpuid_entry2
*cpuid_entries
;
2407 int limit
, nent
= 0, r
= -E2BIG
;
2410 if (cpuid
->nent
< 1)
2412 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
2413 cpuid
->nent
= KVM_MAX_CPUID_ENTRIES
;
2415 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry2
) * cpuid
->nent
);
2419 do_cpuid_ent(&cpuid_entries
[0], 0, 0, &nent
, cpuid
->nent
);
2420 limit
= cpuid_entries
[0].eax
;
2421 for (func
= 1; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
2422 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
2423 &nent
, cpuid
->nent
);
2425 if (nent
>= cpuid
->nent
)
2428 do_cpuid_ent(&cpuid_entries
[nent
], 0x80000000, 0, &nent
, cpuid
->nent
);
2429 limit
= cpuid_entries
[nent
- 1].eax
;
2430 for (func
= 0x80000001; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
2431 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
2432 &nent
, cpuid
->nent
);
2437 if (nent
>= cpuid
->nent
)
2440 do_cpuid_ent(&cpuid_entries
[nent
], KVM_CPUID_SIGNATURE
, 0, &nent
,
2444 if (nent
>= cpuid
->nent
)
2447 do_cpuid_ent(&cpuid_entries
[nent
], KVM_CPUID_FEATURES
, 0, &nent
,
2451 if (nent
>= cpuid
->nent
)
2455 if (copy_to_user(entries
, cpuid_entries
,
2456 nent
* sizeof(struct kvm_cpuid_entry2
)))
2462 vfree(cpuid_entries
);
2467 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu
*vcpu
,
2468 struct kvm_lapic_state
*s
)
2470 memcpy(s
->regs
, vcpu
->arch
.apic
->regs
, sizeof *s
);
2475 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu
*vcpu
,
2476 struct kvm_lapic_state
*s
)
2478 memcpy(vcpu
->arch
.apic
->regs
, s
->regs
, sizeof *s
);
2479 kvm_apic_post_state_restore(vcpu
);
2480 update_cr8_intercept(vcpu
);
2485 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu
*vcpu
,
2486 struct kvm_interrupt
*irq
)
2488 if (irq
->irq
< 0 || irq
->irq
>= 256)
2490 if (irqchip_in_kernel(vcpu
->kvm
))
2493 kvm_queue_interrupt(vcpu
, irq
->irq
, false);
2494 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
2499 static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu
*vcpu
)
2501 kvm_inject_nmi(vcpu
);
2506 static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu
*vcpu
,
2507 struct kvm_tpr_access_ctl
*tac
)
2511 vcpu
->arch
.tpr_access_reporting
= !!tac
->enabled
;
2515 static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu
*vcpu
,
2519 unsigned bank_num
= mcg_cap
& 0xff, bank
;
2522 if (!bank_num
|| bank_num
>= KVM_MAX_MCE_BANKS
)
2524 if (mcg_cap
& ~(KVM_MCE_CAP_SUPPORTED
| 0xff | 0xff0000))
2527 vcpu
->arch
.mcg_cap
= mcg_cap
;
2528 /* Init IA32_MCG_CTL to all 1s */
2529 if (mcg_cap
& MCG_CTL_P
)
2530 vcpu
->arch
.mcg_ctl
= ~(u64
)0;
2531 /* Init IA32_MCi_CTL to all 1s */
2532 for (bank
= 0; bank
< bank_num
; bank
++)
2533 vcpu
->arch
.mce_banks
[bank
*4] = ~(u64
)0;
2538 static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu
*vcpu
,
2539 struct kvm_x86_mce
*mce
)
2541 u64 mcg_cap
= vcpu
->arch
.mcg_cap
;
2542 unsigned bank_num
= mcg_cap
& 0xff;
2543 u64
*banks
= vcpu
->arch
.mce_banks
;
2545 if (mce
->bank
>= bank_num
|| !(mce
->status
& MCI_STATUS_VAL
))
2548 * if IA32_MCG_CTL is not all 1s, the uncorrected error
2549 * reporting is disabled
2551 if ((mce
->status
& MCI_STATUS_UC
) && (mcg_cap
& MCG_CTL_P
) &&
2552 vcpu
->arch
.mcg_ctl
!= ~(u64
)0)
2554 banks
+= 4 * mce
->bank
;
2556 * if IA32_MCi_CTL is not all 1s, the uncorrected error
2557 * reporting is disabled for the bank
2559 if ((mce
->status
& MCI_STATUS_UC
) && banks
[0] != ~(u64
)0)
2561 if (mce
->status
& MCI_STATUS_UC
) {
2562 if ((vcpu
->arch
.mcg_status
& MCG_STATUS_MCIP
) ||
2563 !kvm_read_cr4_bits(vcpu
, X86_CR4_MCE
)) {
2564 printk(KERN_DEBUG
"kvm: set_mce: "
2565 "injects mce exception while "
2566 "previous one is in progress!\n");
2567 kvm_make_request(KVM_REQ_TRIPLE_FAULT
, vcpu
);
2570 if (banks
[1] & MCI_STATUS_VAL
)
2571 mce
->status
|= MCI_STATUS_OVER
;
2572 banks
[2] = mce
->addr
;
2573 banks
[3] = mce
->misc
;
2574 vcpu
->arch
.mcg_status
= mce
->mcg_status
;
2575 banks
[1] = mce
->status
;
2576 kvm_queue_exception(vcpu
, MC_VECTOR
);
2577 } else if (!(banks
[1] & MCI_STATUS_VAL
)
2578 || !(banks
[1] & MCI_STATUS_UC
)) {
2579 if (banks
[1] & MCI_STATUS_VAL
)
2580 mce
->status
|= MCI_STATUS_OVER
;
2581 banks
[2] = mce
->addr
;
2582 banks
[3] = mce
->misc
;
2583 banks
[1] = mce
->status
;
2585 banks
[1] |= MCI_STATUS_OVER
;
2589 static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu
*vcpu
,
2590 struct kvm_vcpu_events
*events
)
2592 events
->exception
.injected
=
2593 vcpu
->arch
.exception
.pending
&&
2594 !kvm_exception_is_soft(vcpu
->arch
.exception
.nr
);
2595 events
->exception
.nr
= vcpu
->arch
.exception
.nr
;
2596 events
->exception
.has_error_code
= vcpu
->arch
.exception
.has_error_code
;
2597 events
->exception
.pad
= 0;
2598 events
->exception
.error_code
= vcpu
->arch
.exception
.error_code
;
2600 events
->interrupt
.injected
=
2601 vcpu
->arch
.interrupt
.pending
&& !vcpu
->arch
.interrupt
.soft
;
2602 events
->interrupt
.nr
= vcpu
->arch
.interrupt
.nr
;
2603 events
->interrupt
.soft
= 0;
2604 events
->interrupt
.shadow
=
2605 kvm_x86_ops
->get_interrupt_shadow(vcpu
,
2606 KVM_X86_SHADOW_INT_MOV_SS
| KVM_X86_SHADOW_INT_STI
);
2608 events
->nmi
.injected
= vcpu
->arch
.nmi_injected
;
2609 events
->nmi
.pending
= vcpu
->arch
.nmi_pending
;
2610 events
->nmi
.masked
= kvm_x86_ops
->get_nmi_mask(vcpu
);
2611 events
->nmi
.pad
= 0;
2613 events
->sipi_vector
= vcpu
->arch
.sipi_vector
;
2615 events
->flags
= (KVM_VCPUEVENT_VALID_NMI_PENDING
2616 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
2617 | KVM_VCPUEVENT_VALID_SHADOW
);
2618 memset(&events
->reserved
, 0, sizeof(events
->reserved
));
2621 static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu
*vcpu
,
2622 struct kvm_vcpu_events
*events
)
2624 if (events
->flags
& ~(KVM_VCPUEVENT_VALID_NMI_PENDING
2625 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
2626 | KVM_VCPUEVENT_VALID_SHADOW
))
2629 vcpu
->arch
.exception
.pending
= events
->exception
.injected
;
2630 vcpu
->arch
.exception
.nr
= events
->exception
.nr
;
2631 vcpu
->arch
.exception
.has_error_code
= events
->exception
.has_error_code
;
2632 vcpu
->arch
.exception
.error_code
= events
->exception
.error_code
;
2634 vcpu
->arch
.interrupt
.pending
= events
->interrupt
.injected
;
2635 vcpu
->arch
.interrupt
.nr
= events
->interrupt
.nr
;
2636 vcpu
->arch
.interrupt
.soft
= events
->interrupt
.soft
;
2637 if (vcpu
->arch
.interrupt
.pending
&& irqchip_in_kernel(vcpu
->kvm
))
2638 kvm_pic_clear_isr_ack(vcpu
->kvm
);
2639 if (events
->flags
& KVM_VCPUEVENT_VALID_SHADOW
)
2640 kvm_x86_ops
->set_interrupt_shadow(vcpu
,
2641 events
->interrupt
.shadow
);
2643 vcpu
->arch
.nmi_injected
= events
->nmi
.injected
;
2644 if (events
->flags
& KVM_VCPUEVENT_VALID_NMI_PENDING
)
2645 vcpu
->arch
.nmi_pending
= events
->nmi
.pending
;
2646 kvm_x86_ops
->set_nmi_mask(vcpu
, events
->nmi
.masked
);
2648 if (events
->flags
& KVM_VCPUEVENT_VALID_SIPI_VECTOR
)
2649 vcpu
->arch
.sipi_vector
= events
->sipi_vector
;
2651 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
2656 static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu
*vcpu
,
2657 struct kvm_debugregs
*dbgregs
)
2659 memcpy(dbgregs
->db
, vcpu
->arch
.db
, sizeof(vcpu
->arch
.db
));
2660 dbgregs
->dr6
= vcpu
->arch
.dr6
;
2661 dbgregs
->dr7
= vcpu
->arch
.dr7
;
2663 memset(&dbgregs
->reserved
, 0, sizeof(dbgregs
->reserved
));
2666 static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu
*vcpu
,
2667 struct kvm_debugregs
*dbgregs
)
2672 memcpy(vcpu
->arch
.db
, dbgregs
->db
, sizeof(vcpu
->arch
.db
));
2673 vcpu
->arch
.dr6
= dbgregs
->dr6
;
2674 vcpu
->arch
.dr7
= dbgregs
->dr7
;
2679 static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu
*vcpu
,
2680 struct kvm_xsave
*guest_xsave
)
2683 memcpy(guest_xsave
->region
,
2684 &vcpu
->arch
.guest_fpu
.state
->xsave
,
2687 memcpy(guest_xsave
->region
,
2688 &vcpu
->arch
.guest_fpu
.state
->fxsave
,
2689 sizeof(struct i387_fxsave_struct
));
2690 *(u64
*)&guest_xsave
->region
[XSAVE_HDR_OFFSET
/ sizeof(u32
)] =
2695 static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu
*vcpu
,
2696 struct kvm_xsave
*guest_xsave
)
2699 *(u64
*)&guest_xsave
->region
[XSAVE_HDR_OFFSET
/ sizeof(u32
)];
2702 memcpy(&vcpu
->arch
.guest_fpu
.state
->xsave
,
2703 guest_xsave
->region
, xstate_size
);
2705 if (xstate_bv
& ~XSTATE_FPSSE
)
2707 memcpy(&vcpu
->arch
.guest_fpu
.state
->fxsave
,
2708 guest_xsave
->region
, sizeof(struct i387_fxsave_struct
));
2713 static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu
*vcpu
,
2714 struct kvm_xcrs
*guest_xcrs
)
2716 if (!cpu_has_xsave
) {
2717 guest_xcrs
->nr_xcrs
= 0;
2721 guest_xcrs
->nr_xcrs
= 1;
2722 guest_xcrs
->flags
= 0;
2723 guest_xcrs
->xcrs
[0].xcr
= XCR_XFEATURE_ENABLED_MASK
;
2724 guest_xcrs
->xcrs
[0].value
= vcpu
->arch
.xcr0
;
2727 static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu
*vcpu
,
2728 struct kvm_xcrs
*guest_xcrs
)
2735 if (guest_xcrs
->nr_xcrs
> KVM_MAX_XCRS
|| guest_xcrs
->flags
)
2738 for (i
= 0; i
< guest_xcrs
->nr_xcrs
; i
++)
2739 /* Only support XCR0 currently */
2740 if (guest_xcrs
->xcrs
[0].xcr
== XCR_XFEATURE_ENABLED_MASK
) {
2741 r
= __kvm_set_xcr(vcpu
, XCR_XFEATURE_ENABLED_MASK
,
2742 guest_xcrs
->xcrs
[0].value
);
2750 long kvm_arch_vcpu_ioctl(struct file
*filp
,
2751 unsigned int ioctl
, unsigned long arg
)
2753 struct kvm_vcpu
*vcpu
= filp
->private_data
;
2754 void __user
*argp
= (void __user
*)arg
;
2757 struct kvm_lapic_state
*lapic
;
2758 struct kvm_xsave
*xsave
;
2759 struct kvm_xcrs
*xcrs
;
2765 case KVM_GET_LAPIC
: {
2767 if (!vcpu
->arch
.apic
)
2769 u
.lapic
= kzalloc(sizeof(struct kvm_lapic_state
), GFP_KERNEL
);
2774 r
= kvm_vcpu_ioctl_get_lapic(vcpu
, u
.lapic
);
2778 if (copy_to_user(argp
, u
.lapic
, sizeof(struct kvm_lapic_state
)))
2783 case KVM_SET_LAPIC
: {
2785 if (!vcpu
->arch
.apic
)
2787 u
.lapic
= kmalloc(sizeof(struct kvm_lapic_state
), GFP_KERNEL
);
2792 if (copy_from_user(u
.lapic
, argp
, sizeof(struct kvm_lapic_state
)))
2794 r
= kvm_vcpu_ioctl_set_lapic(vcpu
, u
.lapic
);
2800 case KVM_INTERRUPT
: {
2801 struct kvm_interrupt irq
;
2804 if (copy_from_user(&irq
, argp
, sizeof irq
))
2806 r
= kvm_vcpu_ioctl_interrupt(vcpu
, &irq
);
2813 r
= kvm_vcpu_ioctl_nmi(vcpu
);
2819 case KVM_SET_CPUID
: {
2820 struct kvm_cpuid __user
*cpuid_arg
= argp
;
2821 struct kvm_cpuid cpuid
;
2824 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
2826 r
= kvm_vcpu_ioctl_set_cpuid(vcpu
, &cpuid
, cpuid_arg
->entries
);
2831 case KVM_SET_CPUID2
: {
2832 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
2833 struct kvm_cpuid2 cpuid
;
2836 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
2838 r
= kvm_vcpu_ioctl_set_cpuid2(vcpu
, &cpuid
,
2839 cpuid_arg
->entries
);
2844 case KVM_GET_CPUID2
: {
2845 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
2846 struct kvm_cpuid2 cpuid
;
2849 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
2851 r
= kvm_vcpu_ioctl_get_cpuid2(vcpu
, &cpuid
,
2852 cpuid_arg
->entries
);
2856 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
2862 r
= msr_io(vcpu
, argp
, kvm_get_msr
, 1);
2865 r
= msr_io(vcpu
, argp
, do_set_msr
, 0);
2867 case KVM_TPR_ACCESS_REPORTING
: {
2868 struct kvm_tpr_access_ctl tac
;
2871 if (copy_from_user(&tac
, argp
, sizeof tac
))
2873 r
= vcpu_ioctl_tpr_access_reporting(vcpu
, &tac
);
2877 if (copy_to_user(argp
, &tac
, sizeof tac
))
2882 case KVM_SET_VAPIC_ADDR
: {
2883 struct kvm_vapic_addr va
;
2886 if (!irqchip_in_kernel(vcpu
->kvm
))
2889 if (copy_from_user(&va
, argp
, sizeof va
))
2892 kvm_lapic_set_vapic_addr(vcpu
, va
.vapic_addr
);
2895 case KVM_X86_SETUP_MCE
: {
2899 if (copy_from_user(&mcg_cap
, argp
, sizeof mcg_cap
))
2901 r
= kvm_vcpu_ioctl_x86_setup_mce(vcpu
, mcg_cap
);
2904 case KVM_X86_SET_MCE
: {
2905 struct kvm_x86_mce mce
;
2908 if (copy_from_user(&mce
, argp
, sizeof mce
))
2910 r
= kvm_vcpu_ioctl_x86_set_mce(vcpu
, &mce
);
2913 case KVM_GET_VCPU_EVENTS
: {
2914 struct kvm_vcpu_events events
;
2916 kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu
, &events
);
2919 if (copy_to_user(argp
, &events
, sizeof(struct kvm_vcpu_events
)))
2924 case KVM_SET_VCPU_EVENTS
: {
2925 struct kvm_vcpu_events events
;
2928 if (copy_from_user(&events
, argp
, sizeof(struct kvm_vcpu_events
)))
2931 r
= kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu
, &events
);
2934 case KVM_GET_DEBUGREGS
: {
2935 struct kvm_debugregs dbgregs
;
2937 kvm_vcpu_ioctl_x86_get_debugregs(vcpu
, &dbgregs
);
2940 if (copy_to_user(argp
, &dbgregs
,
2941 sizeof(struct kvm_debugregs
)))
2946 case KVM_SET_DEBUGREGS
: {
2947 struct kvm_debugregs dbgregs
;
2950 if (copy_from_user(&dbgregs
, argp
,
2951 sizeof(struct kvm_debugregs
)))
2954 r
= kvm_vcpu_ioctl_x86_set_debugregs(vcpu
, &dbgregs
);
2957 case KVM_GET_XSAVE
: {
2958 u
.xsave
= kzalloc(sizeof(struct kvm_xsave
), GFP_KERNEL
);
2963 kvm_vcpu_ioctl_x86_get_xsave(vcpu
, u
.xsave
);
2966 if (copy_to_user(argp
, u
.xsave
, sizeof(struct kvm_xsave
)))
2971 case KVM_SET_XSAVE
: {
2972 u
.xsave
= kzalloc(sizeof(struct kvm_xsave
), GFP_KERNEL
);
2978 if (copy_from_user(u
.xsave
, argp
, sizeof(struct kvm_xsave
)))
2981 r
= kvm_vcpu_ioctl_x86_set_xsave(vcpu
, u
.xsave
);
2984 case KVM_GET_XCRS
: {
2985 u
.xcrs
= kzalloc(sizeof(struct kvm_xcrs
), GFP_KERNEL
);
2990 kvm_vcpu_ioctl_x86_get_xcrs(vcpu
, u
.xcrs
);
2993 if (copy_to_user(argp
, u
.xcrs
,
2994 sizeof(struct kvm_xcrs
)))
2999 case KVM_SET_XCRS
: {
3000 u
.xcrs
= kzalloc(sizeof(struct kvm_xcrs
), GFP_KERNEL
);
3006 if (copy_from_user(u
.xcrs
, argp
,
3007 sizeof(struct kvm_xcrs
)))
3010 r
= kvm_vcpu_ioctl_x86_set_xcrs(vcpu
, u
.xcrs
);
3021 static int kvm_vm_ioctl_set_tss_addr(struct kvm
*kvm
, unsigned long addr
)
3025 if (addr
> (unsigned int)(-3 * PAGE_SIZE
))
3027 ret
= kvm_x86_ops
->set_tss_addr(kvm
, addr
);
3031 static int kvm_vm_ioctl_set_identity_map_addr(struct kvm
*kvm
,
3034 kvm
->arch
.ept_identity_map_addr
= ident_addr
;
3038 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm
*kvm
,
3039 u32 kvm_nr_mmu_pages
)
3041 if (kvm_nr_mmu_pages
< KVM_MIN_ALLOC_MMU_PAGES
)
3044 mutex_lock(&kvm
->slots_lock
);
3045 spin_lock(&kvm
->mmu_lock
);
3047 kvm_mmu_change_mmu_pages(kvm
, kvm_nr_mmu_pages
);
3048 kvm
->arch
.n_requested_mmu_pages
= kvm_nr_mmu_pages
;
3050 spin_unlock(&kvm
->mmu_lock
);
3051 mutex_unlock(&kvm
->slots_lock
);
3055 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm
*kvm
)
3057 return kvm
->arch
.n_max_mmu_pages
;
3060 static int kvm_vm_ioctl_get_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
3065 switch (chip
->chip_id
) {
3066 case KVM_IRQCHIP_PIC_MASTER
:
3067 memcpy(&chip
->chip
.pic
,
3068 &pic_irqchip(kvm
)->pics
[0],
3069 sizeof(struct kvm_pic_state
));
3071 case KVM_IRQCHIP_PIC_SLAVE
:
3072 memcpy(&chip
->chip
.pic
,
3073 &pic_irqchip(kvm
)->pics
[1],
3074 sizeof(struct kvm_pic_state
));
3076 case KVM_IRQCHIP_IOAPIC
:
3077 r
= kvm_get_ioapic(kvm
, &chip
->chip
.ioapic
);
3086 static int kvm_vm_ioctl_set_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
3091 switch (chip
->chip_id
) {
3092 case KVM_IRQCHIP_PIC_MASTER
:
3093 spin_lock(&pic_irqchip(kvm
)->lock
);
3094 memcpy(&pic_irqchip(kvm
)->pics
[0],
3096 sizeof(struct kvm_pic_state
));
3097 spin_unlock(&pic_irqchip(kvm
)->lock
);
3099 case KVM_IRQCHIP_PIC_SLAVE
:
3100 spin_lock(&pic_irqchip(kvm
)->lock
);
3101 memcpy(&pic_irqchip(kvm
)->pics
[1],
3103 sizeof(struct kvm_pic_state
));
3104 spin_unlock(&pic_irqchip(kvm
)->lock
);
3106 case KVM_IRQCHIP_IOAPIC
:
3107 r
= kvm_set_ioapic(kvm
, &chip
->chip
.ioapic
);
3113 kvm_pic_update_irq(pic_irqchip(kvm
));
3117 static int kvm_vm_ioctl_get_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
3121 mutex_lock(&kvm
->arch
.vpit
->pit_state
.lock
);
3122 memcpy(ps
, &kvm
->arch
.vpit
->pit_state
, sizeof(struct kvm_pit_state
));
3123 mutex_unlock(&kvm
->arch
.vpit
->pit_state
.lock
);
3127 static int kvm_vm_ioctl_set_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
3131 mutex_lock(&kvm
->arch
.vpit
->pit_state
.lock
);
3132 memcpy(&kvm
->arch
.vpit
->pit_state
, ps
, sizeof(struct kvm_pit_state
));
3133 kvm_pit_load_count(kvm
, 0, ps
->channels
[0].count
, 0);
3134 mutex_unlock(&kvm
->arch
.vpit
->pit_state
.lock
);
3138 static int kvm_vm_ioctl_get_pit2(struct kvm
*kvm
, struct kvm_pit_state2
*ps
)
3142 mutex_lock(&kvm
->arch
.vpit
->pit_state
.lock
);
3143 memcpy(ps
->channels
, &kvm
->arch
.vpit
->pit_state
.channels
,
3144 sizeof(ps
->channels
));
3145 ps
->flags
= kvm
->arch
.vpit
->pit_state
.flags
;
3146 mutex_unlock(&kvm
->arch
.vpit
->pit_state
.lock
);
3147 memset(&ps
->reserved
, 0, sizeof(ps
->reserved
));
3151 static int kvm_vm_ioctl_set_pit2(struct kvm
*kvm
, struct kvm_pit_state2
*ps
)
3153 int r
= 0, start
= 0;
3154 u32 prev_legacy
, cur_legacy
;
3155 mutex_lock(&kvm
->arch
.vpit
->pit_state
.lock
);
3156 prev_legacy
= kvm
->arch
.vpit
->pit_state
.flags
& KVM_PIT_FLAGS_HPET_LEGACY
;
3157 cur_legacy
= ps
->flags
& KVM_PIT_FLAGS_HPET_LEGACY
;
3158 if (!prev_legacy
&& cur_legacy
)
3160 memcpy(&kvm
->arch
.vpit
->pit_state
.channels
, &ps
->channels
,
3161 sizeof(kvm
->arch
.vpit
->pit_state
.channels
));
3162 kvm
->arch
.vpit
->pit_state
.flags
= ps
->flags
;
3163 kvm_pit_load_count(kvm
, 0, kvm
->arch
.vpit
->pit_state
.channels
[0].count
, start
);
3164 mutex_unlock(&kvm
->arch
.vpit
->pit_state
.lock
);
3168 static int kvm_vm_ioctl_reinject(struct kvm
*kvm
,
3169 struct kvm_reinject_control
*control
)
3171 if (!kvm
->arch
.vpit
)
3173 mutex_lock(&kvm
->arch
.vpit
->pit_state
.lock
);
3174 kvm
->arch
.vpit
->pit_state
.pit_timer
.reinject
= control
->pit_reinject
;
3175 mutex_unlock(&kvm
->arch
.vpit
->pit_state
.lock
);
3180 * Get (and clear) the dirty memory log for a memory slot.
3182 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
3183 struct kvm_dirty_log
*log
)
3186 struct kvm_memory_slot
*memslot
;
3188 unsigned long is_dirty
= 0;
3190 mutex_lock(&kvm
->slots_lock
);
3193 if (log
->slot
>= KVM_MEMORY_SLOTS
)
3196 memslot
= &kvm
->memslots
->memslots
[log
->slot
];
3198 if (!memslot
->dirty_bitmap
)
3201 n
= kvm_dirty_bitmap_bytes(memslot
);
3203 for (i
= 0; !is_dirty
&& i
< n
/sizeof(long); i
++)
3204 is_dirty
= memslot
->dirty_bitmap
[i
];
3206 /* If nothing is dirty, don't bother messing with page tables. */
3208 struct kvm_memslots
*slots
, *old_slots
;
3209 unsigned long *dirty_bitmap
;
3211 dirty_bitmap
= memslot
->dirty_bitmap_head
;
3212 if (memslot
->dirty_bitmap
== dirty_bitmap
)
3213 dirty_bitmap
+= n
/ sizeof(long);
3214 memset(dirty_bitmap
, 0, n
);
3217 slots
= kzalloc(sizeof(struct kvm_memslots
), GFP_KERNEL
);
3220 memcpy(slots
, kvm
->memslots
, sizeof(struct kvm_memslots
));
3221 slots
->memslots
[log
->slot
].dirty_bitmap
= dirty_bitmap
;
3222 slots
->generation
++;
3224 old_slots
= kvm
->memslots
;
3225 rcu_assign_pointer(kvm
->memslots
, slots
);
3226 synchronize_srcu_expedited(&kvm
->srcu
);
3227 dirty_bitmap
= old_slots
->memslots
[log
->slot
].dirty_bitmap
;
3230 spin_lock(&kvm
->mmu_lock
);
3231 kvm_mmu_slot_remove_write_access(kvm
, log
->slot
);
3232 spin_unlock(&kvm
->mmu_lock
);
3235 if (copy_to_user(log
->dirty_bitmap
, dirty_bitmap
, n
))
3239 if (clear_user(log
->dirty_bitmap
, n
))
3245 mutex_unlock(&kvm
->slots_lock
);
3249 long kvm_arch_vm_ioctl(struct file
*filp
,
3250 unsigned int ioctl
, unsigned long arg
)
3252 struct kvm
*kvm
= filp
->private_data
;
3253 void __user
*argp
= (void __user
*)arg
;
3256 * This union makes it completely explicit to gcc-3.x
3257 * that these two variables' stack usage should be
3258 * combined, not added together.
3261 struct kvm_pit_state ps
;
3262 struct kvm_pit_state2 ps2
;
3263 struct kvm_pit_config pit_config
;
3267 case KVM_SET_TSS_ADDR
:
3268 r
= kvm_vm_ioctl_set_tss_addr(kvm
, arg
);
3272 case KVM_SET_IDENTITY_MAP_ADDR
: {
3276 if (copy_from_user(&ident_addr
, argp
, sizeof ident_addr
))
3278 r
= kvm_vm_ioctl_set_identity_map_addr(kvm
, ident_addr
);
3283 case KVM_SET_NR_MMU_PAGES
:
3284 r
= kvm_vm_ioctl_set_nr_mmu_pages(kvm
, arg
);
3288 case KVM_GET_NR_MMU_PAGES
:
3289 r
= kvm_vm_ioctl_get_nr_mmu_pages(kvm
);
3291 case KVM_CREATE_IRQCHIP
: {
3292 struct kvm_pic
*vpic
;
3294 mutex_lock(&kvm
->lock
);
3297 goto create_irqchip_unlock
;
3299 vpic
= kvm_create_pic(kvm
);
3301 r
= kvm_ioapic_init(kvm
);
3303 kvm_io_bus_unregister_dev(kvm
, KVM_PIO_BUS
,
3306 goto create_irqchip_unlock
;
3309 goto create_irqchip_unlock
;
3311 kvm
->arch
.vpic
= vpic
;
3313 r
= kvm_setup_default_irq_routing(kvm
);
3315 mutex_lock(&kvm
->irq_lock
);
3316 kvm_ioapic_destroy(kvm
);
3317 kvm_destroy_pic(kvm
);
3318 mutex_unlock(&kvm
->irq_lock
);
3320 create_irqchip_unlock
:
3321 mutex_unlock(&kvm
->lock
);
3324 case KVM_CREATE_PIT
:
3325 u
.pit_config
.flags
= KVM_PIT_SPEAKER_DUMMY
;
3327 case KVM_CREATE_PIT2
:
3329 if (copy_from_user(&u
.pit_config
, argp
,
3330 sizeof(struct kvm_pit_config
)))
3333 mutex_lock(&kvm
->slots_lock
);
3336 goto create_pit_unlock
;
3338 kvm
->arch
.vpit
= kvm_create_pit(kvm
, u
.pit_config
.flags
);
3342 mutex_unlock(&kvm
->slots_lock
);
3344 case KVM_IRQ_LINE_STATUS
:
3345 case KVM_IRQ_LINE
: {
3346 struct kvm_irq_level irq_event
;
3349 if (copy_from_user(&irq_event
, argp
, sizeof irq_event
))
3352 if (irqchip_in_kernel(kvm
)) {
3354 status
= kvm_set_irq(kvm
, KVM_USERSPACE_IRQ_SOURCE_ID
,
3355 irq_event
.irq
, irq_event
.level
);
3356 if (ioctl
== KVM_IRQ_LINE_STATUS
) {
3358 irq_event
.status
= status
;
3359 if (copy_to_user(argp
, &irq_event
,
3367 case KVM_GET_IRQCHIP
: {
3368 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3369 struct kvm_irqchip
*chip
= kmalloc(sizeof(*chip
), GFP_KERNEL
);
3375 if (copy_from_user(chip
, argp
, sizeof *chip
))
3376 goto get_irqchip_out
;
3378 if (!irqchip_in_kernel(kvm
))
3379 goto get_irqchip_out
;
3380 r
= kvm_vm_ioctl_get_irqchip(kvm
, chip
);
3382 goto get_irqchip_out
;
3384 if (copy_to_user(argp
, chip
, sizeof *chip
))
3385 goto get_irqchip_out
;
3393 case KVM_SET_IRQCHIP
: {
3394 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3395 struct kvm_irqchip
*chip
= kmalloc(sizeof(*chip
), GFP_KERNEL
);
3401 if (copy_from_user(chip
, argp
, sizeof *chip
))
3402 goto set_irqchip_out
;
3404 if (!irqchip_in_kernel(kvm
))
3405 goto set_irqchip_out
;
3406 r
= kvm_vm_ioctl_set_irqchip(kvm
, chip
);
3408 goto set_irqchip_out
;
3418 if (copy_from_user(&u
.ps
, argp
, sizeof(struct kvm_pit_state
)))
3421 if (!kvm
->arch
.vpit
)
3423 r
= kvm_vm_ioctl_get_pit(kvm
, &u
.ps
);
3427 if (copy_to_user(argp
, &u
.ps
, sizeof(struct kvm_pit_state
)))
3434 if (copy_from_user(&u
.ps
, argp
, sizeof u
.ps
))
3437 if (!kvm
->arch
.vpit
)
3439 r
= kvm_vm_ioctl_set_pit(kvm
, &u
.ps
);
3445 case KVM_GET_PIT2
: {
3447 if (!kvm
->arch
.vpit
)
3449 r
= kvm_vm_ioctl_get_pit2(kvm
, &u
.ps2
);
3453 if (copy_to_user(argp
, &u
.ps2
, sizeof(u
.ps2
)))
3458 case KVM_SET_PIT2
: {
3460 if (copy_from_user(&u
.ps2
, argp
, sizeof(u
.ps2
)))
3463 if (!kvm
->arch
.vpit
)
3465 r
= kvm_vm_ioctl_set_pit2(kvm
, &u
.ps2
);
3471 case KVM_REINJECT_CONTROL
: {
3472 struct kvm_reinject_control control
;
3474 if (copy_from_user(&control
, argp
, sizeof(control
)))
3476 r
= kvm_vm_ioctl_reinject(kvm
, &control
);
3482 case KVM_XEN_HVM_CONFIG
: {
3484 if (copy_from_user(&kvm
->arch
.xen_hvm_config
, argp
,
3485 sizeof(struct kvm_xen_hvm_config
)))
3488 if (kvm
->arch
.xen_hvm_config
.flags
)
3493 case KVM_SET_CLOCK
: {
3494 struct kvm_clock_data user_ns
;
3499 if (copy_from_user(&user_ns
, argp
, sizeof(user_ns
)))
3507 local_irq_disable();
3508 now_ns
= get_kernel_ns();
3509 delta
= user_ns
.clock
- now_ns
;
3511 kvm
->arch
.kvmclock_offset
= delta
;
3514 case KVM_GET_CLOCK
: {
3515 struct kvm_clock_data user_ns
;
3518 local_irq_disable();
3519 now_ns
= get_kernel_ns();
3520 user_ns
.clock
= kvm
->arch
.kvmclock_offset
+ now_ns
;
3523 memset(&user_ns
.pad
, 0, sizeof(user_ns
.pad
));
3526 if (copy_to_user(argp
, &user_ns
, sizeof(user_ns
)))
3539 static void kvm_init_msr_list(void)
3544 /* skip the first msrs in the list. KVM-specific */
3545 for (i
= j
= KVM_SAVE_MSRS_BEGIN
; i
< ARRAY_SIZE(msrs_to_save
); i
++) {
3546 if (rdmsr_safe(msrs_to_save
[i
], &dummy
[0], &dummy
[1]) < 0)
3549 msrs_to_save
[j
] = msrs_to_save
[i
];
3552 num_msrs_to_save
= j
;
3555 static int vcpu_mmio_write(struct kvm_vcpu
*vcpu
, gpa_t addr
, int len
,
3558 if (vcpu
->arch
.apic
&&
3559 !kvm_iodevice_write(&vcpu
->arch
.apic
->dev
, addr
, len
, v
))
3562 return kvm_io_bus_write(vcpu
->kvm
, KVM_MMIO_BUS
, addr
, len
, v
);
3565 static int vcpu_mmio_read(struct kvm_vcpu
*vcpu
, gpa_t addr
, int len
, void *v
)
3567 if (vcpu
->arch
.apic
&&
3568 !kvm_iodevice_read(&vcpu
->arch
.apic
->dev
, addr
, len
, v
))
3571 return kvm_io_bus_read(vcpu
->kvm
, KVM_MMIO_BUS
, addr
, len
, v
);
3574 static void kvm_set_segment(struct kvm_vcpu
*vcpu
,
3575 struct kvm_segment
*var
, int seg
)
3577 kvm_x86_ops
->set_segment(vcpu
, var
, seg
);
3580 void kvm_get_segment(struct kvm_vcpu
*vcpu
,
3581 struct kvm_segment
*var
, int seg
)
3583 kvm_x86_ops
->get_segment(vcpu
, var
, seg
);
3586 static gpa_t
translate_gpa(struct kvm_vcpu
*vcpu
, gpa_t gpa
, u32 access
)
3591 static gpa_t
translate_nested_gpa(struct kvm_vcpu
*vcpu
, gpa_t gpa
, u32 access
)
3596 BUG_ON(!mmu_is_nested(vcpu
));
3598 /* NPT walks are always user-walks */
3599 access
|= PFERR_USER_MASK
;
3600 t_gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, gpa
, access
, &error
);
3601 if (t_gpa
== UNMAPPED_GVA
)
3602 vcpu
->arch
.fault
.nested
= true;
3607 gpa_t
kvm_mmu_gva_to_gpa_read(struct kvm_vcpu
*vcpu
, gva_t gva
, u32
*error
)
3609 u32 access
= (kvm_x86_ops
->get_cpl(vcpu
) == 3) ? PFERR_USER_MASK
: 0;
3610 return vcpu
->arch
.walk_mmu
->gva_to_gpa(vcpu
, gva
, access
, error
);
3613 gpa_t
kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu
*vcpu
, gva_t gva
, u32
*error
)
3615 u32 access
= (kvm_x86_ops
->get_cpl(vcpu
) == 3) ? PFERR_USER_MASK
: 0;
3616 access
|= PFERR_FETCH_MASK
;
3617 return vcpu
->arch
.walk_mmu
->gva_to_gpa(vcpu
, gva
, access
, error
);
3620 gpa_t
kvm_mmu_gva_to_gpa_write(struct kvm_vcpu
*vcpu
, gva_t gva
, u32
*error
)
3622 u32 access
= (kvm_x86_ops
->get_cpl(vcpu
) == 3) ? PFERR_USER_MASK
: 0;
3623 access
|= PFERR_WRITE_MASK
;
3624 return vcpu
->arch
.walk_mmu
->gva_to_gpa(vcpu
, gva
, access
, error
);
3627 /* uses this to access any guest's mapped memory without checking CPL */
3628 gpa_t
kvm_mmu_gva_to_gpa_system(struct kvm_vcpu
*vcpu
, gva_t gva
, u32
*error
)
3630 return vcpu
->arch
.walk_mmu
->gva_to_gpa(vcpu
, gva
, 0, error
);
3633 static int kvm_read_guest_virt_helper(gva_t addr
, void *val
, unsigned int bytes
,
3634 struct kvm_vcpu
*vcpu
, u32 access
,
3638 int r
= X86EMUL_CONTINUE
;
3641 gpa_t gpa
= vcpu
->arch
.walk_mmu
->gva_to_gpa(vcpu
, addr
, access
,
3643 unsigned offset
= addr
& (PAGE_SIZE
-1);
3644 unsigned toread
= min(bytes
, (unsigned)PAGE_SIZE
- offset
);
3647 if (gpa
== UNMAPPED_GVA
) {
3648 r
= X86EMUL_PROPAGATE_FAULT
;
3651 ret
= kvm_read_guest(vcpu
->kvm
, gpa
, data
, toread
);
3653 r
= X86EMUL_IO_NEEDED
;
3665 /* used for instruction fetching */
3666 static int kvm_fetch_guest_virt(gva_t addr
, void *val
, unsigned int bytes
,
3667 struct kvm_vcpu
*vcpu
, u32
*error
)
3669 u32 access
= (kvm_x86_ops
->get_cpl(vcpu
) == 3) ? PFERR_USER_MASK
: 0;
3670 return kvm_read_guest_virt_helper(addr
, val
, bytes
, vcpu
,
3671 access
| PFERR_FETCH_MASK
, error
);
3674 static int kvm_read_guest_virt(gva_t addr
, void *val
, unsigned int bytes
,
3675 struct kvm_vcpu
*vcpu
, u32
*error
)
3677 u32 access
= (kvm_x86_ops
->get_cpl(vcpu
) == 3) ? PFERR_USER_MASK
: 0;
3678 return kvm_read_guest_virt_helper(addr
, val
, bytes
, vcpu
, access
,
3682 static int kvm_read_guest_virt_system(gva_t addr
, void *val
, unsigned int bytes
,
3683 struct kvm_vcpu
*vcpu
, u32
*error
)
3685 return kvm_read_guest_virt_helper(addr
, val
, bytes
, vcpu
, 0, error
);
3688 static int kvm_write_guest_virt_system(gva_t addr
, void *val
,
3690 struct kvm_vcpu
*vcpu
,
3694 int r
= X86EMUL_CONTINUE
;
3697 gpa_t gpa
= vcpu
->arch
.walk_mmu
->gva_to_gpa(vcpu
, addr
,
3700 unsigned offset
= addr
& (PAGE_SIZE
-1);
3701 unsigned towrite
= min(bytes
, (unsigned)PAGE_SIZE
- offset
);
3704 if (gpa
== UNMAPPED_GVA
) {
3705 r
= X86EMUL_PROPAGATE_FAULT
;
3708 ret
= kvm_write_guest(vcpu
->kvm
, gpa
, data
, towrite
);
3710 r
= X86EMUL_IO_NEEDED
;
3722 static int emulator_read_emulated(unsigned long addr
,
3725 unsigned int *error_code
,
3726 struct kvm_vcpu
*vcpu
)
3730 if (vcpu
->mmio_read_completed
) {
3731 memcpy(val
, vcpu
->mmio_data
, bytes
);
3732 trace_kvm_mmio(KVM_TRACE_MMIO_READ
, bytes
,
3733 vcpu
->mmio_phys_addr
, *(u64
*)val
);
3734 vcpu
->mmio_read_completed
= 0;
3735 return X86EMUL_CONTINUE
;
3738 gpa
= kvm_mmu_gva_to_gpa_read(vcpu
, addr
, error_code
);
3740 if (gpa
== UNMAPPED_GVA
)
3741 return X86EMUL_PROPAGATE_FAULT
;
3743 /* For APIC access vmexit */
3744 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
3747 if (kvm_read_guest_virt(addr
, val
, bytes
, vcpu
, NULL
)
3748 == X86EMUL_CONTINUE
)
3749 return X86EMUL_CONTINUE
;
3753 * Is this MMIO handled locally?
3755 if (!vcpu_mmio_read(vcpu
, gpa
, bytes
, val
)) {
3756 trace_kvm_mmio(KVM_TRACE_MMIO_READ
, bytes
, gpa
, *(u64
*)val
);
3757 return X86EMUL_CONTINUE
;
3760 trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED
, bytes
, gpa
, 0);
3762 vcpu
->mmio_needed
= 1;
3763 vcpu
->run
->exit_reason
= KVM_EXIT_MMIO
;
3764 vcpu
->run
->mmio
.phys_addr
= vcpu
->mmio_phys_addr
= gpa
;
3765 vcpu
->run
->mmio
.len
= vcpu
->mmio_size
= bytes
;
3766 vcpu
->run
->mmio
.is_write
= vcpu
->mmio_is_write
= 0;
3768 return X86EMUL_IO_NEEDED
;
3771 int emulator_write_phys(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
3772 const void *val
, int bytes
)
3776 ret
= kvm_write_guest(vcpu
->kvm
, gpa
, val
, bytes
);
3779 kvm_mmu_pte_write(vcpu
, gpa
, val
, bytes
, 1);
3783 static int emulator_write_emulated_onepage(unsigned long addr
,
3786 unsigned int *error_code
,
3787 struct kvm_vcpu
*vcpu
)
3791 gpa
= kvm_mmu_gva_to_gpa_write(vcpu
, addr
, error_code
);
3793 if (gpa
== UNMAPPED_GVA
)
3794 return X86EMUL_PROPAGATE_FAULT
;
3796 /* For APIC access vmexit */
3797 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
3800 if (emulator_write_phys(vcpu
, gpa
, val
, bytes
))
3801 return X86EMUL_CONTINUE
;
3804 trace_kvm_mmio(KVM_TRACE_MMIO_WRITE
, bytes
, gpa
, *(u64
*)val
);
3806 * Is this MMIO handled locally?
3808 if (!vcpu_mmio_write(vcpu
, gpa
, bytes
, val
))
3809 return X86EMUL_CONTINUE
;
3811 vcpu
->mmio_needed
= 1;
3812 vcpu
->run
->exit_reason
= KVM_EXIT_MMIO
;
3813 vcpu
->run
->mmio
.phys_addr
= vcpu
->mmio_phys_addr
= gpa
;
3814 vcpu
->run
->mmio
.len
= vcpu
->mmio_size
= bytes
;
3815 vcpu
->run
->mmio
.is_write
= vcpu
->mmio_is_write
= 1;
3816 memcpy(vcpu
->run
->mmio
.data
, val
, bytes
);
3818 return X86EMUL_CONTINUE
;
3821 int emulator_write_emulated(unsigned long addr
,
3824 unsigned int *error_code
,
3825 struct kvm_vcpu
*vcpu
)
3827 /* Crossing a page boundary? */
3828 if (((addr
+ bytes
- 1) ^ addr
) & PAGE_MASK
) {
3831 now
= -addr
& ~PAGE_MASK
;
3832 rc
= emulator_write_emulated_onepage(addr
, val
, now
, error_code
,
3834 if (rc
!= X86EMUL_CONTINUE
)
3840 return emulator_write_emulated_onepage(addr
, val
, bytes
, error_code
,
3844 #define CMPXCHG_TYPE(t, ptr, old, new) \
3845 (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old))
3847 #ifdef CONFIG_X86_64
3848 # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new)
3850 # define CMPXCHG64(ptr, old, new) \
3851 (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old))
3854 static int emulator_cmpxchg_emulated(unsigned long addr
,
3858 unsigned int *error_code
,
3859 struct kvm_vcpu
*vcpu
)
3866 /* guests cmpxchg8b have to be emulated atomically */
3867 if (bytes
> 8 || (bytes
& (bytes
- 1)))
3870 gpa
= kvm_mmu_gva_to_gpa_write(vcpu
, addr
, NULL
);
3872 if (gpa
== UNMAPPED_GVA
||
3873 (gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
3876 if (((gpa
+ bytes
- 1) & PAGE_MASK
) != (gpa
& PAGE_MASK
))
3879 page
= gfn_to_page(vcpu
->kvm
, gpa
>> PAGE_SHIFT
);
3880 if (is_error_page(page
)) {
3881 kvm_release_page_clean(page
);
3885 kaddr
= kmap_atomic(page
, KM_USER0
);
3886 kaddr
+= offset_in_page(gpa
);
3889 exchanged
= CMPXCHG_TYPE(u8
, kaddr
, old
, new);
3892 exchanged
= CMPXCHG_TYPE(u16
, kaddr
, old
, new);
3895 exchanged
= CMPXCHG_TYPE(u32
, kaddr
, old
, new);
3898 exchanged
= CMPXCHG64(kaddr
, old
, new);
3903 kunmap_atomic(kaddr
, KM_USER0
);
3904 kvm_release_page_dirty(page
);
3907 return X86EMUL_CMPXCHG_FAILED
;
3909 kvm_mmu_pte_write(vcpu
, gpa
, new, bytes
, 1);
3911 return X86EMUL_CONTINUE
;
3914 printk_once(KERN_WARNING
"kvm: emulating exchange as write\n");
3916 return emulator_write_emulated(addr
, new, bytes
, error_code
, vcpu
);
3919 static int kernel_pio(struct kvm_vcpu
*vcpu
, void *pd
)
3921 /* TODO: String I/O for in kernel device */
3924 if (vcpu
->arch
.pio
.in
)
3925 r
= kvm_io_bus_read(vcpu
->kvm
, KVM_PIO_BUS
, vcpu
->arch
.pio
.port
,
3926 vcpu
->arch
.pio
.size
, pd
);
3928 r
= kvm_io_bus_write(vcpu
->kvm
, KVM_PIO_BUS
,
3929 vcpu
->arch
.pio
.port
, vcpu
->arch
.pio
.size
,
3935 static int emulator_pio_in_emulated(int size
, unsigned short port
, void *val
,
3936 unsigned int count
, struct kvm_vcpu
*vcpu
)
3938 if (vcpu
->arch
.pio
.count
)
3941 trace_kvm_pio(0, port
, size
, 1);
3943 vcpu
->arch
.pio
.port
= port
;
3944 vcpu
->arch
.pio
.in
= 1;
3945 vcpu
->arch
.pio
.count
= count
;
3946 vcpu
->arch
.pio
.size
= size
;
3948 if (!kernel_pio(vcpu
, vcpu
->arch
.pio_data
)) {
3950 memcpy(val
, vcpu
->arch
.pio_data
, size
* count
);
3951 vcpu
->arch
.pio
.count
= 0;
3955 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
3956 vcpu
->run
->io
.direction
= KVM_EXIT_IO_IN
;
3957 vcpu
->run
->io
.size
= size
;
3958 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
3959 vcpu
->run
->io
.count
= count
;
3960 vcpu
->run
->io
.port
= port
;
3965 static int emulator_pio_out_emulated(int size
, unsigned short port
,
3966 const void *val
, unsigned int count
,
3967 struct kvm_vcpu
*vcpu
)
3969 trace_kvm_pio(1, port
, size
, 1);
3971 vcpu
->arch
.pio
.port
= port
;
3972 vcpu
->arch
.pio
.in
= 0;
3973 vcpu
->arch
.pio
.count
= count
;
3974 vcpu
->arch
.pio
.size
= size
;
3976 memcpy(vcpu
->arch
.pio_data
, val
, size
* count
);
3978 if (!kernel_pio(vcpu
, vcpu
->arch
.pio_data
)) {
3979 vcpu
->arch
.pio
.count
= 0;
3983 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
3984 vcpu
->run
->io
.direction
= KVM_EXIT_IO_OUT
;
3985 vcpu
->run
->io
.size
= size
;
3986 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
3987 vcpu
->run
->io
.count
= count
;
3988 vcpu
->run
->io
.port
= port
;
3993 static unsigned long get_segment_base(struct kvm_vcpu
*vcpu
, int seg
)
3995 return kvm_x86_ops
->get_segment_base(vcpu
, seg
);
3998 int emulate_invlpg(struct kvm_vcpu
*vcpu
, gva_t address
)
4000 kvm_mmu_invlpg(vcpu
, address
);
4001 return X86EMUL_CONTINUE
;
4004 int kvm_emulate_wbinvd(struct kvm_vcpu
*vcpu
)
4006 if (!need_emulate_wbinvd(vcpu
))
4007 return X86EMUL_CONTINUE
;
4009 if (kvm_x86_ops
->has_wbinvd_exit()) {
4011 smp_call_function_many(vcpu
->arch
.wbinvd_dirty_mask
,
4012 wbinvd_ipi
, NULL
, 1);
4014 cpumask_clear(vcpu
->arch
.wbinvd_dirty_mask
);
4017 return X86EMUL_CONTINUE
;
4019 EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd
);
4021 int emulate_clts(struct kvm_vcpu
*vcpu
)
4023 kvm_x86_ops
->set_cr0(vcpu
, kvm_read_cr0_bits(vcpu
, ~X86_CR0_TS
));
4024 kvm_x86_ops
->fpu_activate(vcpu
);
4025 return X86EMUL_CONTINUE
;
4028 int emulator_get_dr(int dr
, unsigned long *dest
, struct kvm_vcpu
*vcpu
)
4030 return _kvm_get_dr(vcpu
, dr
, dest
);
4033 int emulator_set_dr(int dr
, unsigned long value
, struct kvm_vcpu
*vcpu
)
4036 return __kvm_set_dr(vcpu
, dr
, value
);
4039 static u64
mk_cr_64(u64 curr_cr
, u32 new_val
)
4041 return (curr_cr
& ~((1ULL << 32) - 1)) | new_val
;
4044 static unsigned long emulator_get_cr(int cr
, struct kvm_vcpu
*vcpu
)
4046 unsigned long value
;
4050 value
= kvm_read_cr0(vcpu
);
4053 value
= vcpu
->arch
.cr2
;
4056 value
= vcpu
->arch
.cr3
;
4059 value
= kvm_read_cr4(vcpu
);
4062 value
= kvm_get_cr8(vcpu
);
4065 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
4072 static int emulator_set_cr(int cr
, unsigned long val
, struct kvm_vcpu
*vcpu
)
4078 res
= kvm_set_cr0(vcpu
, mk_cr_64(kvm_read_cr0(vcpu
), val
));
4081 vcpu
->arch
.cr2
= val
;
4084 res
= kvm_set_cr3(vcpu
, val
);
4087 res
= kvm_set_cr4(vcpu
, mk_cr_64(kvm_read_cr4(vcpu
), val
));
4090 res
= __kvm_set_cr8(vcpu
, val
& 0xfUL
);
4093 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
4100 static int emulator_get_cpl(struct kvm_vcpu
*vcpu
)
4102 return kvm_x86_ops
->get_cpl(vcpu
);
4105 static void emulator_get_gdt(struct desc_ptr
*dt
, struct kvm_vcpu
*vcpu
)
4107 kvm_x86_ops
->get_gdt(vcpu
, dt
);
4110 static void emulator_get_idt(struct desc_ptr
*dt
, struct kvm_vcpu
*vcpu
)
4112 kvm_x86_ops
->get_idt(vcpu
, dt
);
4115 static unsigned long emulator_get_cached_segment_base(int seg
,
4116 struct kvm_vcpu
*vcpu
)
4118 return get_segment_base(vcpu
, seg
);
4121 static bool emulator_get_cached_descriptor(struct desc_struct
*desc
, int seg
,
4122 struct kvm_vcpu
*vcpu
)
4124 struct kvm_segment var
;
4126 kvm_get_segment(vcpu
, &var
, seg
);
4133 set_desc_limit(desc
, var
.limit
);
4134 set_desc_base(desc
, (unsigned long)var
.base
);
4135 desc
->type
= var
.type
;
4137 desc
->dpl
= var
.dpl
;
4138 desc
->p
= var
.present
;
4139 desc
->avl
= var
.avl
;
4147 static void emulator_set_cached_descriptor(struct desc_struct
*desc
, int seg
,
4148 struct kvm_vcpu
*vcpu
)
4150 struct kvm_segment var
;
4152 /* needed to preserve selector */
4153 kvm_get_segment(vcpu
, &var
, seg
);
4155 var
.base
= get_desc_base(desc
);
4156 var
.limit
= get_desc_limit(desc
);
4158 var
.limit
= (var
.limit
<< 12) | 0xfff;
4159 var
.type
= desc
->type
;
4160 var
.present
= desc
->p
;
4161 var
.dpl
= desc
->dpl
;
4166 var
.avl
= desc
->avl
;
4167 var
.present
= desc
->p
;
4168 var
.unusable
= !var
.present
;
4171 kvm_set_segment(vcpu
, &var
, seg
);
4175 static u16
emulator_get_segment_selector(int seg
, struct kvm_vcpu
*vcpu
)
4177 struct kvm_segment kvm_seg
;
4179 kvm_get_segment(vcpu
, &kvm_seg
, seg
);
4180 return kvm_seg
.selector
;
4183 static void emulator_set_segment_selector(u16 sel
, int seg
,
4184 struct kvm_vcpu
*vcpu
)
4186 struct kvm_segment kvm_seg
;
4188 kvm_get_segment(vcpu
, &kvm_seg
, seg
);
4189 kvm_seg
.selector
= sel
;
4190 kvm_set_segment(vcpu
, &kvm_seg
, seg
);
4193 static struct x86_emulate_ops emulate_ops
= {
4194 .read_std
= kvm_read_guest_virt_system
,
4195 .write_std
= kvm_write_guest_virt_system
,
4196 .fetch
= kvm_fetch_guest_virt
,
4197 .read_emulated
= emulator_read_emulated
,
4198 .write_emulated
= emulator_write_emulated
,
4199 .cmpxchg_emulated
= emulator_cmpxchg_emulated
,
4200 .pio_in_emulated
= emulator_pio_in_emulated
,
4201 .pio_out_emulated
= emulator_pio_out_emulated
,
4202 .get_cached_descriptor
= emulator_get_cached_descriptor
,
4203 .set_cached_descriptor
= emulator_set_cached_descriptor
,
4204 .get_segment_selector
= emulator_get_segment_selector
,
4205 .set_segment_selector
= emulator_set_segment_selector
,
4206 .get_cached_segment_base
= emulator_get_cached_segment_base
,
4207 .get_gdt
= emulator_get_gdt
,
4208 .get_idt
= emulator_get_idt
,
4209 .get_cr
= emulator_get_cr
,
4210 .set_cr
= emulator_set_cr
,
4211 .cpl
= emulator_get_cpl
,
4212 .get_dr
= emulator_get_dr
,
4213 .set_dr
= emulator_set_dr
,
4214 .set_msr
= kvm_set_msr
,
4215 .get_msr
= kvm_get_msr
,
4218 static void cache_all_regs(struct kvm_vcpu
*vcpu
)
4220 kvm_register_read(vcpu
, VCPU_REGS_RAX
);
4221 kvm_register_read(vcpu
, VCPU_REGS_RSP
);
4222 kvm_register_read(vcpu
, VCPU_REGS_RIP
);
4223 vcpu
->arch
.regs_dirty
= ~0;
4226 static void toggle_interruptibility(struct kvm_vcpu
*vcpu
, u32 mask
)
4228 u32 int_shadow
= kvm_x86_ops
->get_interrupt_shadow(vcpu
, mask
);
4230 * an sti; sti; sequence only disable interrupts for the first
4231 * instruction. So, if the last instruction, be it emulated or
4232 * not, left the system with the INT_STI flag enabled, it
4233 * means that the last instruction is an sti. We should not
4234 * leave the flag on in this case. The same goes for mov ss
4236 if (!(int_shadow
& mask
))
4237 kvm_x86_ops
->set_interrupt_shadow(vcpu
, mask
);
4240 static void inject_emulated_exception(struct kvm_vcpu
*vcpu
)
4242 struct x86_emulate_ctxt
*ctxt
= &vcpu
->arch
.emulate_ctxt
;
4243 if (ctxt
->exception
== PF_VECTOR
)
4244 kvm_propagate_fault(vcpu
);
4245 else if (ctxt
->error_code_valid
)
4246 kvm_queue_exception_e(vcpu
, ctxt
->exception
, ctxt
->error_code
);
4248 kvm_queue_exception(vcpu
, ctxt
->exception
);
4251 static void init_emulate_ctxt(struct kvm_vcpu
*vcpu
)
4253 struct decode_cache
*c
= &vcpu
->arch
.emulate_ctxt
.decode
;
4256 cache_all_regs(vcpu
);
4258 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
4260 vcpu
->arch
.emulate_ctxt
.vcpu
= vcpu
;
4261 vcpu
->arch
.emulate_ctxt
.eflags
= kvm_x86_ops
->get_rflags(vcpu
);
4262 vcpu
->arch
.emulate_ctxt
.eip
= kvm_rip_read(vcpu
);
4263 vcpu
->arch
.emulate_ctxt
.mode
=
4264 (!is_protmode(vcpu
)) ? X86EMUL_MODE_REAL
:
4265 (vcpu
->arch
.emulate_ctxt
.eflags
& X86_EFLAGS_VM
)
4266 ? X86EMUL_MODE_VM86
: cs_l
4267 ? X86EMUL_MODE_PROT64
: cs_db
4268 ? X86EMUL_MODE_PROT32
: X86EMUL_MODE_PROT16
;
4269 memset(c
, 0, sizeof(struct decode_cache
));
4270 memcpy(c
->regs
, vcpu
->arch
.regs
, sizeof c
->regs
);
4273 int kvm_inject_realmode_interrupt(struct kvm_vcpu
*vcpu
, int irq
)
4275 struct decode_cache
*c
= &vcpu
->arch
.emulate_ctxt
.decode
;
4278 init_emulate_ctxt(vcpu
);
4280 vcpu
->arch
.emulate_ctxt
.decode
.op_bytes
= 2;
4281 vcpu
->arch
.emulate_ctxt
.decode
.ad_bytes
= 2;
4282 vcpu
->arch
.emulate_ctxt
.decode
.eip
= vcpu
->arch
.emulate_ctxt
.eip
;
4283 ret
= emulate_int_real(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
, irq
);
4285 if (ret
!= X86EMUL_CONTINUE
)
4286 return EMULATE_FAIL
;
4288 vcpu
->arch
.emulate_ctxt
.eip
= c
->eip
;
4289 memcpy(vcpu
->arch
.regs
, c
->regs
, sizeof c
->regs
);
4290 kvm_rip_write(vcpu
, vcpu
->arch
.emulate_ctxt
.eip
);
4291 kvm_x86_ops
->set_rflags(vcpu
, vcpu
->arch
.emulate_ctxt
.eflags
);
4293 if (irq
== NMI_VECTOR
)
4294 vcpu
->arch
.nmi_pending
= false;
4296 vcpu
->arch
.interrupt
.pending
= false;
4298 return EMULATE_DONE
;
4300 EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt
);
4302 static int handle_emulation_failure(struct kvm_vcpu
*vcpu
)
4304 ++vcpu
->stat
.insn_emulation_fail
;
4305 trace_kvm_emulate_insn_failed(vcpu
);
4306 vcpu
->run
->exit_reason
= KVM_EXIT_INTERNAL_ERROR
;
4307 vcpu
->run
->internal
.suberror
= KVM_INTERNAL_ERROR_EMULATION
;
4308 vcpu
->run
->internal
.ndata
= 0;
4309 kvm_queue_exception(vcpu
, UD_VECTOR
);
4310 return EMULATE_FAIL
;
4313 static bool reexecute_instruction(struct kvm_vcpu
*vcpu
, gva_t gva
)
4321 * if emulation was due to access to shadowed page table
4322 * and it failed try to unshadow page and re-entetr the
4323 * guest to let CPU execute the instruction.
4325 if (kvm_mmu_unprotect_page_virt(vcpu
, gva
))
4328 gpa
= kvm_mmu_gva_to_gpa_system(vcpu
, gva
, NULL
);
4330 if (gpa
== UNMAPPED_GVA
)
4331 return true; /* let cpu generate fault */
4333 if (!kvm_is_error_hva(gfn_to_hva(vcpu
->kvm
, gpa
>> PAGE_SHIFT
)))
4339 int emulate_instruction(struct kvm_vcpu
*vcpu
,
4345 struct decode_cache
*c
= &vcpu
->arch
.emulate_ctxt
.decode
;
4347 kvm_clear_exception_queue(vcpu
);
4348 vcpu
->arch
.mmio_fault_cr2
= cr2
;
4350 * TODO: fix emulate.c to use guest_read/write_register
4351 * instead of direct ->regs accesses, can save hundred cycles
4352 * on Intel for instructions that don't read/change RSP, for
4355 cache_all_regs(vcpu
);
4357 if (!(emulation_type
& EMULTYPE_NO_DECODE
)) {
4358 init_emulate_ctxt(vcpu
);
4359 vcpu
->arch
.emulate_ctxt
.interruptibility
= 0;
4360 vcpu
->arch
.emulate_ctxt
.exception
= -1;
4361 vcpu
->arch
.emulate_ctxt
.perm_ok
= false;
4363 r
= x86_decode_insn(&vcpu
->arch
.emulate_ctxt
);
4364 if (r
== X86EMUL_PROPAGATE_FAULT
)
4367 trace_kvm_emulate_insn_start(vcpu
);
4369 /* Only allow emulation of specific instructions on #UD
4370 * (namely VMMCALL, sysenter, sysexit, syscall)*/
4371 if (emulation_type
& EMULTYPE_TRAP_UD
) {
4373 return EMULATE_FAIL
;
4375 case 0x01: /* VMMCALL */
4376 if (c
->modrm_mod
!= 3 || c
->modrm_rm
!= 1)
4377 return EMULATE_FAIL
;
4379 case 0x34: /* sysenter */
4380 case 0x35: /* sysexit */
4381 if (c
->modrm_mod
!= 0 || c
->modrm_rm
!= 0)
4382 return EMULATE_FAIL
;
4384 case 0x05: /* syscall */
4385 if (c
->modrm_mod
!= 0 || c
->modrm_rm
!= 0)
4386 return EMULATE_FAIL
;
4389 return EMULATE_FAIL
;
4392 if (!(c
->modrm_reg
== 0 || c
->modrm_reg
== 3))
4393 return EMULATE_FAIL
;
4396 ++vcpu
->stat
.insn_emulation
;
4398 if (reexecute_instruction(vcpu
, cr2
))
4399 return EMULATE_DONE
;
4400 if (emulation_type
& EMULTYPE_SKIP
)
4401 return EMULATE_FAIL
;
4402 return handle_emulation_failure(vcpu
);
4406 if (emulation_type
& EMULTYPE_SKIP
) {
4407 kvm_rip_write(vcpu
, vcpu
->arch
.emulate_ctxt
.decode
.eip
);
4408 return EMULATE_DONE
;
4411 /* this is needed for vmware backdor interface to work since it
4412 changes registers values during IO operation */
4413 memcpy(c
->regs
, vcpu
->arch
.regs
, sizeof c
->regs
);
4416 r
= x86_emulate_insn(&vcpu
->arch
.emulate_ctxt
);
4418 if (r
== EMULATION_FAILED
) {
4419 if (reexecute_instruction(vcpu
, cr2
))
4420 return EMULATE_DONE
;
4422 return handle_emulation_failure(vcpu
);
4426 if (vcpu
->arch
.emulate_ctxt
.exception
>= 0) {
4427 inject_emulated_exception(vcpu
);
4429 } else if (vcpu
->arch
.pio
.count
) {
4430 if (!vcpu
->arch
.pio
.in
)
4431 vcpu
->arch
.pio
.count
= 0;
4432 r
= EMULATE_DO_MMIO
;
4433 } else if (vcpu
->mmio_needed
) {
4434 if (vcpu
->mmio_is_write
)
4435 vcpu
->mmio_needed
= 0;
4436 r
= EMULATE_DO_MMIO
;
4437 } else if (r
== EMULATION_RESTART
)
4442 toggle_interruptibility(vcpu
, vcpu
->arch
.emulate_ctxt
.interruptibility
);
4443 kvm_x86_ops
->set_rflags(vcpu
, vcpu
->arch
.emulate_ctxt
.eflags
);
4444 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
4445 memcpy(vcpu
->arch
.regs
, c
->regs
, sizeof c
->regs
);
4446 kvm_rip_write(vcpu
, vcpu
->arch
.emulate_ctxt
.eip
);
4450 EXPORT_SYMBOL_GPL(emulate_instruction
);
4452 int kvm_fast_pio_out(struct kvm_vcpu
*vcpu
, int size
, unsigned short port
)
4454 unsigned long val
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
4455 int ret
= emulator_pio_out_emulated(size
, port
, &val
, 1, vcpu
);
4456 /* do not return to emulator after return from userspace */
4457 vcpu
->arch
.pio
.count
= 0;
4460 EXPORT_SYMBOL_GPL(kvm_fast_pio_out
);
4462 static void tsc_bad(void *info
)
4464 __get_cpu_var(cpu_tsc_khz
) = 0;
4467 static void tsc_khz_changed(void *data
)
4469 struct cpufreq_freqs
*freq
= data
;
4470 unsigned long khz
= 0;
4474 else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC
))
4475 khz
= cpufreq_quick_get(raw_smp_processor_id());
4478 __get_cpu_var(cpu_tsc_khz
) = khz
;
4481 static int kvmclock_cpufreq_notifier(struct notifier_block
*nb
, unsigned long val
,
4484 struct cpufreq_freqs
*freq
= data
;
4486 struct kvm_vcpu
*vcpu
;
4487 int i
, send_ipi
= 0;
4490 * We allow guests to temporarily run on slowing clocks,
4491 * provided we notify them after, or to run on accelerating
4492 * clocks, provided we notify them before. Thus time never
4495 * However, we have a problem. We can't atomically update
4496 * the frequency of a given CPU from this function; it is
4497 * merely a notifier, which can be called from any CPU.
4498 * Changing the TSC frequency at arbitrary points in time
4499 * requires a recomputation of local variables related to
4500 * the TSC for each VCPU. We must flag these local variables
4501 * to be updated and be sure the update takes place with the
4502 * new frequency before any guests proceed.
4504 * Unfortunately, the combination of hotplug CPU and frequency
4505 * change creates an intractable locking scenario; the order
4506 * of when these callouts happen is undefined with respect to
4507 * CPU hotplug, and they can race with each other. As such,
4508 * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is
4509 * undefined; you can actually have a CPU frequency change take
4510 * place in between the computation of X and the setting of the
4511 * variable. To protect against this problem, all updates of
4512 * the per_cpu tsc_khz variable are done in an interrupt
4513 * protected IPI, and all callers wishing to update the value
4514 * must wait for a synchronous IPI to complete (which is trivial
4515 * if the caller is on the CPU already). This establishes the
4516 * necessary total order on variable updates.
4518 * Note that because a guest time update may take place
4519 * anytime after the setting of the VCPU's request bit, the
4520 * correct TSC value must be set before the request. However,
4521 * to ensure the update actually makes it to any guest which
4522 * starts running in hardware virtualization between the set
4523 * and the acquisition of the spinlock, we must also ping the
4524 * CPU after setting the request bit.
4528 if (val
== CPUFREQ_PRECHANGE
&& freq
->old
> freq
->new)
4530 if (val
== CPUFREQ_POSTCHANGE
&& freq
->old
< freq
->new)
4533 smp_call_function_single(freq
->cpu
, tsc_khz_changed
, freq
, 1);
4535 spin_lock(&kvm_lock
);
4536 list_for_each_entry(kvm
, &vm_list
, vm_list
) {
4537 kvm_for_each_vcpu(i
, vcpu
, kvm
) {
4538 if (vcpu
->cpu
!= freq
->cpu
)
4540 kvm_make_request(KVM_REQ_CLOCK_UPDATE
, vcpu
);
4541 if (vcpu
->cpu
!= smp_processor_id())
4545 spin_unlock(&kvm_lock
);
4547 if (freq
->old
< freq
->new && send_ipi
) {
4549 * We upscale the frequency. Must make the guest
4550 * doesn't see old kvmclock values while running with
4551 * the new frequency, otherwise we risk the guest sees
4552 * time go backwards.
4554 * In case we update the frequency for another cpu
4555 * (which might be in guest context) send an interrupt
4556 * to kick the cpu out of guest context. Next time
4557 * guest context is entered kvmclock will be updated,
4558 * so the guest will not see stale values.
4560 smp_call_function_single(freq
->cpu
, tsc_khz_changed
, freq
, 1);
4565 static struct notifier_block kvmclock_cpufreq_notifier_block
= {
4566 .notifier_call
= kvmclock_cpufreq_notifier
4569 static int kvmclock_cpu_notifier(struct notifier_block
*nfb
,
4570 unsigned long action
, void *hcpu
)
4572 unsigned int cpu
= (unsigned long)hcpu
;
4576 case CPU_DOWN_FAILED
:
4577 smp_call_function_single(cpu
, tsc_khz_changed
, NULL
, 1);
4579 case CPU_DOWN_PREPARE
:
4580 smp_call_function_single(cpu
, tsc_bad
, NULL
, 1);
4586 static struct notifier_block kvmclock_cpu_notifier_block
= {
4587 .notifier_call
= kvmclock_cpu_notifier
,
4588 .priority
= -INT_MAX
4591 static void kvm_timer_init(void)
4595 max_tsc_khz
= tsc_khz
;
4596 register_hotcpu_notifier(&kvmclock_cpu_notifier_block
);
4597 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC
)) {
4598 #ifdef CONFIG_CPU_FREQ
4599 struct cpufreq_policy policy
;
4600 memset(&policy
, 0, sizeof(policy
));
4602 cpufreq_get_policy(&policy
, cpu
);
4603 if (policy
.cpuinfo
.max_freq
)
4604 max_tsc_khz
= policy
.cpuinfo
.max_freq
;
4607 cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block
,
4608 CPUFREQ_TRANSITION_NOTIFIER
);
4610 pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz
);
4611 for_each_online_cpu(cpu
)
4612 smp_call_function_single(cpu
, tsc_khz_changed
, NULL
, 1);
4615 static DEFINE_PER_CPU(struct kvm_vcpu
*, current_vcpu
);
4617 static int kvm_is_in_guest(void)
4619 return percpu_read(current_vcpu
) != NULL
;
4622 static int kvm_is_user_mode(void)
4626 if (percpu_read(current_vcpu
))
4627 user_mode
= kvm_x86_ops
->get_cpl(percpu_read(current_vcpu
));
4629 return user_mode
!= 0;
4632 static unsigned long kvm_get_guest_ip(void)
4634 unsigned long ip
= 0;
4636 if (percpu_read(current_vcpu
))
4637 ip
= kvm_rip_read(percpu_read(current_vcpu
));
4642 static struct perf_guest_info_callbacks kvm_guest_cbs
= {
4643 .is_in_guest
= kvm_is_in_guest
,
4644 .is_user_mode
= kvm_is_user_mode
,
4645 .get_guest_ip
= kvm_get_guest_ip
,
4648 void kvm_before_handle_nmi(struct kvm_vcpu
*vcpu
)
4650 percpu_write(current_vcpu
, vcpu
);
4652 EXPORT_SYMBOL_GPL(kvm_before_handle_nmi
);
4654 void kvm_after_handle_nmi(struct kvm_vcpu
*vcpu
)
4656 percpu_write(current_vcpu
, NULL
);
4658 EXPORT_SYMBOL_GPL(kvm_after_handle_nmi
);
4660 int kvm_arch_init(void *opaque
)
4663 struct kvm_x86_ops
*ops
= (struct kvm_x86_ops
*)opaque
;
4666 printk(KERN_ERR
"kvm: already loaded the other module\n");
4671 if (!ops
->cpu_has_kvm_support()) {
4672 printk(KERN_ERR
"kvm: no hardware support\n");
4676 if (ops
->disabled_by_bios()) {
4677 printk(KERN_ERR
"kvm: disabled by bios\n");
4682 r
= kvm_mmu_module_init();
4686 kvm_init_msr_list();
4689 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
4690 kvm_mmu_set_mask_ptes(PT_USER_MASK
, PT_ACCESSED_MASK
,
4691 PT_DIRTY_MASK
, PT64_NX_MASK
, 0);
4695 perf_register_guest_info_callbacks(&kvm_guest_cbs
);
4698 host_xcr0
= xgetbv(XCR_XFEATURE_ENABLED_MASK
);
4706 void kvm_arch_exit(void)
4708 perf_unregister_guest_info_callbacks(&kvm_guest_cbs
);
4710 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC
))
4711 cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block
,
4712 CPUFREQ_TRANSITION_NOTIFIER
);
4713 unregister_hotcpu_notifier(&kvmclock_cpu_notifier_block
);
4715 kvm_mmu_module_exit();
4718 int kvm_emulate_halt(struct kvm_vcpu
*vcpu
)
4720 ++vcpu
->stat
.halt_exits
;
4721 if (irqchip_in_kernel(vcpu
->kvm
)) {
4722 vcpu
->arch
.mp_state
= KVM_MP_STATE_HALTED
;
4725 vcpu
->run
->exit_reason
= KVM_EXIT_HLT
;
4729 EXPORT_SYMBOL_GPL(kvm_emulate_halt
);
4731 static inline gpa_t
hc_gpa(struct kvm_vcpu
*vcpu
, unsigned long a0
,
4734 if (is_long_mode(vcpu
))
4737 return a0
| ((gpa_t
)a1
<< 32);
4740 int kvm_hv_hypercall(struct kvm_vcpu
*vcpu
)
4742 u64 param
, ingpa
, outgpa
, ret
;
4743 uint16_t code
, rep_idx
, rep_cnt
, res
= HV_STATUS_SUCCESS
, rep_done
= 0;
4744 bool fast
, longmode
;
4748 * hypercall generates UD from non zero cpl and real mode
4751 if (kvm_x86_ops
->get_cpl(vcpu
) != 0 || !is_protmode(vcpu
)) {
4752 kvm_queue_exception(vcpu
, UD_VECTOR
);
4756 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
4757 longmode
= is_long_mode(vcpu
) && cs_l
== 1;
4760 param
= ((u64
)kvm_register_read(vcpu
, VCPU_REGS_RDX
) << 32) |
4761 (kvm_register_read(vcpu
, VCPU_REGS_RAX
) & 0xffffffff);
4762 ingpa
= ((u64
)kvm_register_read(vcpu
, VCPU_REGS_RBX
) << 32) |
4763 (kvm_register_read(vcpu
, VCPU_REGS_RCX
) & 0xffffffff);
4764 outgpa
= ((u64
)kvm_register_read(vcpu
, VCPU_REGS_RDI
) << 32) |
4765 (kvm_register_read(vcpu
, VCPU_REGS_RSI
) & 0xffffffff);
4767 #ifdef CONFIG_X86_64
4769 param
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
4770 ingpa
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
4771 outgpa
= kvm_register_read(vcpu
, VCPU_REGS_R8
);
4775 code
= param
& 0xffff;
4776 fast
= (param
>> 16) & 0x1;
4777 rep_cnt
= (param
>> 32) & 0xfff;
4778 rep_idx
= (param
>> 48) & 0xfff;
4780 trace_kvm_hv_hypercall(code
, fast
, rep_cnt
, rep_idx
, ingpa
, outgpa
);
4783 case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT
:
4784 kvm_vcpu_on_spin(vcpu
);
4787 res
= HV_STATUS_INVALID_HYPERCALL_CODE
;
4791 ret
= res
| (((u64
)rep_done
& 0xfff) << 32);
4793 kvm_register_write(vcpu
, VCPU_REGS_RAX
, ret
);
4795 kvm_register_write(vcpu
, VCPU_REGS_RDX
, ret
>> 32);
4796 kvm_register_write(vcpu
, VCPU_REGS_RAX
, ret
& 0xffffffff);
4802 int kvm_emulate_hypercall(struct kvm_vcpu
*vcpu
)
4804 unsigned long nr
, a0
, a1
, a2
, a3
, ret
;
4807 if (kvm_hv_hypercall_enabled(vcpu
->kvm
))
4808 return kvm_hv_hypercall(vcpu
);
4810 nr
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
4811 a0
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
4812 a1
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
4813 a2
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
4814 a3
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
4816 trace_kvm_hypercall(nr
, a0
, a1
, a2
, a3
);
4818 if (!is_long_mode(vcpu
)) {
4826 if (kvm_x86_ops
->get_cpl(vcpu
) != 0) {
4832 case KVM_HC_VAPIC_POLL_IRQ
:
4836 r
= kvm_pv_mmu_op(vcpu
, a0
, hc_gpa(vcpu
, a1
, a2
), &ret
);
4843 kvm_register_write(vcpu
, VCPU_REGS_RAX
, ret
);
4844 ++vcpu
->stat
.hypercalls
;
4847 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall
);
4849 int kvm_fix_hypercall(struct kvm_vcpu
*vcpu
)
4851 char instruction
[3];
4852 unsigned long rip
= kvm_rip_read(vcpu
);
4855 * Blow out the MMU to ensure that no other VCPU has an active mapping
4856 * to ensure that the updated hypercall appears atomically across all
4859 kvm_mmu_zap_all(vcpu
->kvm
);
4861 kvm_x86_ops
->patch_hypercall(vcpu
, instruction
);
4863 return emulator_write_emulated(rip
, instruction
, 3, NULL
, vcpu
);
4866 void realmode_lgdt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
4868 struct desc_ptr dt
= { limit
, base
};
4870 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
4873 void realmode_lidt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
4875 struct desc_ptr dt
= { limit
, base
};
4877 kvm_x86_ops
->set_idt(vcpu
, &dt
);
4880 static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu
*vcpu
, int i
)
4882 struct kvm_cpuid_entry2
*e
= &vcpu
->arch
.cpuid_entries
[i
];
4883 int j
, nent
= vcpu
->arch
.cpuid_nent
;
4885 e
->flags
&= ~KVM_CPUID_FLAG_STATE_READ_NEXT
;
4886 /* when no next entry is found, the current entry[i] is reselected */
4887 for (j
= i
+ 1; ; j
= (j
+ 1) % nent
) {
4888 struct kvm_cpuid_entry2
*ej
= &vcpu
->arch
.cpuid_entries
[j
];
4889 if (ej
->function
== e
->function
) {
4890 ej
->flags
|= KVM_CPUID_FLAG_STATE_READ_NEXT
;
4894 return 0; /* silence gcc, even though control never reaches here */
4897 /* find an entry with matching function, matching index (if needed), and that
4898 * should be read next (if it's stateful) */
4899 static int is_matching_cpuid_entry(struct kvm_cpuid_entry2
*e
,
4900 u32 function
, u32 index
)
4902 if (e
->function
!= function
)
4904 if ((e
->flags
& KVM_CPUID_FLAG_SIGNIFCANT_INDEX
) && e
->index
!= index
)
4906 if ((e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
) &&
4907 !(e
->flags
& KVM_CPUID_FLAG_STATE_READ_NEXT
))
4912 struct kvm_cpuid_entry2
*kvm_find_cpuid_entry(struct kvm_vcpu
*vcpu
,
4913 u32 function
, u32 index
)
4916 struct kvm_cpuid_entry2
*best
= NULL
;
4918 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
4919 struct kvm_cpuid_entry2
*e
;
4921 e
= &vcpu
->arch
.cpuid_entries
[i
];
4922 if (is_matching_cpuid_entry(e
, function
, index
)) {
4923 if (e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
)
4924 move_to_next_stateful_cpuid_entry(vcpu
, i
);
4929 * Both basic or both extended?
4931 if (((e
->function
^ function
) & 0x80000000) == 0)
4932 if (!best
|| e
->function
> best
->function
)
4937 EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry
);
4939 int cpuid_maxphyaddr(struct kvm_vcpu
*vcpu
)
4941 struct kvm_cpuid_entry2
*best
;
4943 best
= kvm_find_cpuid_entry(vcpu
, 0x80000000, 0);
4944 if (!best
|| best
->eax
< 0x80000008)
4946 best
= kvm_find_cpuid_entry(vcpu
, 0x80000008, 0);
4948 return best
->eax
& 0xff;
4953 void kvm_emulate_cpuid(struct kvm_vcpu
*vcpu
)
4955 u32 function
, index
;
4956 struct kvm_cpuid_entry2
*best
;
4958 function
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
4959 index
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
4960 kvm_register_write(vcpu
, VCPU_REGS_RAX
, 0);
4961 kvm_register_write(vcpu
, VCPU_REGS_RBX
, 0);
4962 kvm_register_write(vcpu
, VCPU_REGS_RCX
, 0);
4963 kvm_register_write(vcpu
, VCPU_REGS_RDX
, 0);
4964 best
= kvm_find_cpuid_entry(vcpu
, function
, index
);
4966 kvm_register_write(vcpu
, VCPU_REGS_RAX
, best
->eax
);
4967 kvm_register_write(vcpu
, VCPU_REGS_RBX
, best
->ebx
);
4968 kvm_register_write(vcpu
, VCPU_REGS_RCX
, best
->ecx
);
4969 kvm_register_write(vcpu
, VCPU_REGS_RDX
, best
->edx
);
4971 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
4972 trace_kvm_cpuid(function
,
4973 kvm_register_read(vcpu
, VCPU_REGS_RAX
),
4974 kvm_register_read(vcpu
, VCPU_REGS_RBX
),
4975 kvm_register_read(vcpu
, VCPU_REGS_RCX
),
4976 kvm_register_read(vcpu
, VCPU_REGS_RDX
));
4978 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid
);
4981 * Check if userspace requested an interrupt window, and that the
4982 * interrupt window is open.
4984 * No need to exit to userspace if we already have an interrupt queued.
4986 static int dm_request_for_irq_injection(struct kvm_vcpu
*vcpu
)
4988 return (!irqchip_in_kernel(vcpu
->kvm
) && !kvm_cpu_has_interrupt(vcpu
) &&
4989 vcpu
->run
->request_interrupt_window
&&
4990 kvm_arch_interrupt_allowed(vcpu
));
4993 static void post_kvm_run_save(struct kvm_vcpu
*vcpu
)
4995 struct kvm_run
*kvm_run
= vcpu
->run
;
4997 kvm_run
->if_flag
= (kvm_get_rflags(vcpu
) & X86_EFLAGS_IF
) != 0;
4998 kvm_run
->cr8
= kvm_get_cr8(vcpu
);
4999 kvm_run
->apic_base
= kvm_get_apic_base(vcpu
);
5000 if (irqchip_in_kernel(vcpu
->kvm
))
5001 kvm_run
->ready_for_interrupt_injection
= 1;
5003 kvm_run
->ready_for_interrupt_injection
=
5004 kvm_arch_interrupt_allowed(vcpu
) &&
5005 !kvm_cpu_has_interrupt(vcpu
) &&
5006 !kvm_event_needs_reinjection(vcpu
);
5009 static void vapic_enter(struct kvm_vcpu
*vcpu
)
5011 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
5014 if (!apic
|| !apic
->vapic_addr
)
5017 page
= gfn_to_page(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
5019 vcpu
->arch
.apic
->vapic_page
= page
;
5022 static void vapic_exit(struct kvm_vcpu
*vcpu
)
5024 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
5027 if (!apic
|| !apic
->vapic_addr
)
5030 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
5031 kvm_release_page_dirty(apic
->vapic_page
);
5032 mark_page_dirty(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
5033 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
5036 static void update_cr8_intercept(struct kvm_vcpu
*vcpu
)
5040 if (!kvm_x86_ops
->update_cr8_intercept
)
5043 if (!vcpu
->arch
.apic
)
5046 if (!vcpu
->arch
.apic
->vapic_addr
)
5047 max_irr
= kvm_lapic_find_highest_irr(vcpu
);
5054 tpr
= kvm_lapic_get_cr8(vcpu
);
5056 kvm_x86_ops
->update_cr8_intercept(vcpu
, tpr
, max_irr
);
5059 static void inject_pending_event(struct kvm_vcpu
*vcpu
)
5061 /* try to reinject previous events if any */
5062 if (vcpu
->arch
.exception
.pending
) {
5063 trace_kvm_inj_exception(vcpu
->arch
.exception
.nr
,
5064 vcpu
->arch
.exception
.has_error_code
,
5065 vcpu
->arch
.exception
.error_code
);
5066 kvm_x86_ops
->queue_exception(vcpu
, vcpu
->arch
.exception
.nr
,
5067 vcpu
->arch
.exception
.has_error_code
,
5068 vcpu
->arch
.exception
.error_code
,
5069 vcpu
->arch
.exception
.reinject
);
5073 if (vcpu
->arch
.nmi_injected
) {
5074 kvm_x86_ops
->set_nmi(vcpu
);
5078 if (vcpu
->arch
.interrupt
.pending
) {
5079 kvm_x86_ops
->set_irq(vcpu
);
5083 /* try to inject new event if pending */
5084 if (vcpu
->arch
.nmi_pending
) {
5085 if (kvm_x86_ops
->nmi_allowed(vcpu
)) {
5086 vcpu
->arch
.nmi_pending
= false;
5087 vcpu
->arch
.nmi_injected
= true;
5088 kvm_x86_ops
->set_nmi(vcpu
);
5090 } else if (kvm_cpu_has_interrupt(vcpu
)) {
5091 if (kvm_x86_ops
->interrupt_allowed(vcpu
)) {
5092 kvm_queue_interrupt(vcpu
, kvm_cpu_get_interrupt(vcpu
),
5094 kvm_x86_ops
->set_irq(vcpu
);
5099 static void kvm_load_guest_xcr0(struct kvm_vcpu
*vcpu
)
5101 if (kvm_read_cr4_bits(vcpu
, X86_CR4_OSXSAVE
) &&
5102 !vcpu
->guest_xcr0_loaded
) {
5103 /* kvm_set_xcr() also depends on this */
5104 xsetbv(XCR_XFEATURE_ENABLED_MASK
, vcpu
->arch
.xcr0
);
5105 vcpu
->guest_xcr0_loaded
= 1;
5109 static void kvm_put_guest_xcr0(struct kvm_vcpu
*vcpu
)
5111 if (vcpu
->guest_xcr0_loaded
) {
5112 if (vcpu
->arch
.xcr0
!= host_xcr0
)
5113 xsetbv(XCR_XFEATURE_ENABLED_MASK
, host_xcr0
);
5114 vcpu
->guest_xcr0_loaded
= 0;
5118 static int vcpu_enter_guest(struct kvm_vcpu
*vcpu
)
5121 bool req_int_win
= !irqchip_in_kernel(vcpu
->kvm
) &&
5122 vcpu
->run
->request_interrupt_window
;
5124 if (vcpu
->requests
) {
5125 if (kvm_check_request(KVM_REQ_MMU_RELOAD
, vcpu
))
5126 kvm_mmu_unload(vcpu
);
5127 if (kvm_check_request(KVM_REQ_MIGRATE_TIMER
, vcpu
))
5128 __kvm_migrate_timers(vcpu
);
5129 if (kvm_check_request(KVM_REQ_CLOCK_UPDATE
, vcpu
)) {
5130 r
= kvm_guest_time_update(vcpu
);
5134 if (kvm_check_request(KVM_REQ_MMU_SYNC
, vcpu
))
5135 kvm_mmu_sync_roots(vcpu
);
5136 if (kvm_check_request(KVM_REQ_TLB_FLUSH
, vcpu
))
5137 kvm_x86_ops
->tlb_flush(vcpu
);
5138 if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS
, vcpu
)) {
5139 vcpu
->run
->exit_reason
= KVM_EXIT_TPR_ACCESS
;
5143 if (kvm_check_request(KVM_REQ_TRIPLE_FAULT
, vcpu
)) {
5144 vcpu
->run
->exit_reason
= KVM_EXIT_SHUTDOWN
;
5148 if (kvm_check_request(KVM_REQ_DEACTIVATE_FPU
, vcpu
)) {
5149 vcpu
->fpu_active
= 0;
5150 kvm_x86_ops
->fpu_deactivate(vcpu
);
5152 if (kvm_check_request(KVM_REQ_APF_HALT
, vcpu
)) {
5153 /* Page is swapped out. Do synthetic halt */
5154 vcpu
->arch
.apf
.halted
= true;
5160 r
= kvm_mmu_reload(vcpu
);
5164 if (kvm_check_request(KVM_REQ_EVENT
, vcpu
) || req_int_win
) {
5165 inject_pending_event(vcpu
);
5167 /* enable NMI/IRQ window open exits if needed */
5168 if (vcpu
->arch
.nmi_pending
)
5169 kvm_x86_ops
->enable_nmi_window(vcpu
);
5170 else if (kvm_cpu_has_interrupt(vcpu
) || req_int_win
)
5171 kvm_x86_ops
->enable_irq_window(vcpu
);
5173 if (kvm_lapic_enabled(vcpu
)) {
5174 update_cr8_intercept(vcpu
);
5175 kvm_lapic_sync_to_vapic(vcpu
);
5181 kvm_x86_ops
->prepare_guest_switch(vcpu
);
5182 if (vcpu
->fpu_active
)
5183 kvm_load_guest_fpu(vcpu
);
5184 kvm_load_guest_xcr0(vcpu
);
5186 atomic_set(&vcpu
->guest_mode
, 1);
5189 local_irq_disable();
5191 if (!atomic_read(&vcpu
->guest_mode
) || vcpu
->requests
5192 || need_resched() || signal_pending(current
)) {
5193 atomic_set(&vcpu
->guest_mode
, 0);
5197 kvm_x86_ops
->cancel_injection(vcpu
);
5202 srcu_read_unlock(&vcpu
->kvm
->srcu
, vcpu
->srcu_idx
);
5206 if (unlikely(vcpu
->arch
.switch_db_regs
)) {
5208 set_debugreg(vcpu
->arch
.eff_db
[0], 0);
5209 set_debugreg(vcpu
->arch
.eff_db
[1], 1);
5210 set_debugreg(vcpu
->arch
.eff_db
[2], 2);
5211 set_debugreg(vcpu
->arch
.eff_db
[3], 3);
5214 trace_kvm_entry(vcpu
->vcpu_id
);
5215 kvm_x86_ops
->run(vcpu
);
5218 * If the guest has used debug registers, at least dr7
5219 * will be disabled while returning to the host.
5220 * If we don't have active breakpoints in the host, we don't
5221 * care about the messed up debug address registers. But if
5222 * we have some of them active, restore the old state.
5224 if (hw_breakpoint_active())
5225 hw_breakpoint_restore();
5227 kvm_get_msr(vcpu
, MSR_IA32_TSC
, &vcpu
->arch
.last_guest_tsc
);
5229 atomic_set(&vcpu
->guest_mode
, 0);
5236 * We must have an instruction between local_irq_enable() and
5237 * kvm_guest_exit(), so the timer interrupt isn't delayed by
5238 * the interrupt shadow. The stat.exits increment will do nicely.
5239 * But we need to prevent reordering, hence this barrier():
5247 vcpu
->srcu_idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
5250 * Profile KVM exit RIPs:
5252 if (unlikely(prof_on
== KVM_PROFILING
)) {
5253 unsigned long rip
= kvm_rip_read(vcpu
);
5254 profile_hit(KVM_PROFILING
, (void *)rip
);
5258 kvm_lapic_sync_from_vapic(vcpu
);
5260 r
= kvm_x86_ops
->handle_exit(vcpu
);
5266 static int __vcpu_run(struct kvm_vcpu
*vcpu
)
5269 struct kvm
*kvm
= vcpu
->kvm
;
5271 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
)) {
5272 pr_debug("vcpu %d received sipi with vector # %x\n",
5273 vcpu
->vcpu_id
, vcpu
->arch
.sipi_vector
);
5274 kvm_lapic_reset(vcpu
);
5275 r
= kvm_arch_vcpu_reset(vcpu
);
5278 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
5281 vcpu
->srcu_idx
= srcu_read_lock(&kvm
->srcu
);
5286 if (vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
&&
5287 !vcpu
->arch
.apf
.halted
)
5288 r
= vcpu_enter_guest(vcpu
);
5290 srcu_read_unlock(&kvm
->srcu
, vcpu
->srcu_idx
);
5291 kvm_vcpu_block(vcpu
);
5292 vcpu
->srcu_idx
= srcu_read_lock(&kvm
->srcu
);
5293 if (kvm_check_request(KVM_REQ_UNHALT
, vcpu
))
5295 switch(vcpu
->arch
.mp_state
) {
5296 case KVM_MP_STATE_HALTED
:
5297 vcpu
->arch
.mp_state
=
5298 KVM_MP_STATE_RUNNABLE
;
5299 case KVM_MP_STATE_RUNNABLE
:
5300 vcpu
->arch
.apf
.halted
= false;
5302 case KVM_MP_STATE_SIPI_RECEIVED
:
5313 clear_bit(KVM_REQ_PENDING_TIMER
, &vcpu
->requests
);
5314 if (kvm_cpu_has_pending_timer(vcpu
))
5315 kvm_inject_pending_timer_irqs(vcpu
);
5317 if (dm_request_for_irq_injection(vcpu
)) {
5319 vcpu
->run
->exit_reason
= KVM_EXIT_INTR
;
5320 ++vcpu
->stat
.request_irq_exits
;
5323 kvm_check_async_pf_completion(vcpu
);
5325 if (signal_pending(current
)) {
5327 vcpu
->run
->exit_reason
= KVM_EXIT_INTR
;
5328 ++vcpu
->stat
.signal_exits
;
5330 if (need_resched()) {
5331 srcu_read_unlock(&kvm
->srcu
, vcpu
->srcu_idx
);
5333 vcpu
->srcu_idx
= srcu_read_lock(&kvm
->srcu
);
5337 srcu_read_unlock(&kvm
->srcu
, vcpu
->srcu_idx
);
5344 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
5349 if (vcpu
->sigset_active
)
5350 sigprocmask(SIG_SETMASK
, &vcpu
->sigset
, &sigsaved
);
5352 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_UNINITIALIZED
)) {
5353 kvm_vcpu_block(vcpu
);
5354 clear_bit(KVM_REQ_UNHALT
, &vcpu
->requests
);
5359 /* re-sync apic's tpr */
5360 if (!irqchip_in_kernel(vcpu
->kvm
))
5361 kvm_set_cr8(vcpu
, kvm_run
->cr8
);
5363 if (vcpu
->arch
.pio
.count
|| vcpu
->mmio_needed
) {
5364 if (vcpu
->mmio_needed
) {
5365 memcpy(vcpu
->mmio_data
, kvm_run
->mmio
.data
, 8);
5366 vcpu
->mmio_read_completed
= 1;
5367 vcpu
->mmio_needed
= 0;
5369 vcpu
->srcu_idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
5370 r
= emulate_instruction(vcpu
, 0, 0, EMULTYPE_NO_DECODE
);
5371 srcu_read_unlock(&vcpu
->kvm
->srcu
, vcpu
->srcu_idx
);
5372 if (r
!= EMULATE_DONE
) {
5377 if (kvm_run
->exit_reason
== KVM_EXIT_HYPERCALL
)
5378 kvm_register_write(vcpu
, VCPU_REGS_RAX
,
5379 kvm_run
->hypercall
.ret
);
5381 r
= __vcpu_run(vcpu
);
5384 post_kvm_run_save(vcpu
);
5385 if (vcpu
->sigset_active
)
5386 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
5391 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
5393 regs
->rax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
5394 regs
->rbx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
5395 regs
->rcx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
5396 regs
->rdx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
5397 regs
->rsi
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
5398 regs
->rdi
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
5399 regs
->rsp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
5400 regs
->rbp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
5401 #ifdef CONFIG_X86_64
5402 regs
->r8
= kvm_register_read(vcpu
, VCPU_REGS_R8
);
5403 regs
->r9
= kvm_register_read(vcpu
, VCPU_REGS_R9
);
5404 regs
->r10
= kvm_register_read(vcpu
, VCPU_REGS_R10
);
5405 regs
->r11
= kvm_register_read(vcpu
, VCPU_REGS_R11
);
5406 regs
->r12
= kvm_register_read(vcpu
, VCPU_REGS_R12
);
5407 regs
->r13
= kvm_register_read(vcpu
, VCPU_REGS_R13
);
5408 regs
->r14
= kvm_register_read(vcpu
, VCPU_REGS_R14
);
5409 regs
->r15
= kvm_register_read(vcpu
, VCPU_REGS_R15
);
5412 regs
->rip
= kvm_rip_read(vcpu
);
5413 regs
->rflags
= kvm_get_rflags(vcpu
);
5418 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
5420 kvm_register_write(vcpu
, VCPU_REGS_RAX
, regs
->rax
);
5421 kvm_register_write(vcpu
, VCPU_REGS_RBX
, regs
->rbx
);
5422 kvm_register_write(vcpu
, VCPU_REGS_RCX
, regs
->rcx
);
5423 kvm_register_write(vcpu
, VCPU_REGS_RDX
, regs
->rdx
);
5424 kvm_register_write(vcpu
, VCPU_REGS_RSI
, regs
->rsi
);
5425 kvm_register_write(vcpu
, VCPU_REGS_RDI
, regs
->rdi
);
5426 kvm_register_write(vcpu
, VCPU_REGS_RSP
, regs
->rsp
);
5427 kvm_register_write(vcpu
, VCPU_REGS_RBP
, regs
->rbp
);
5428 #ifdef CONFIG_X86_64
5429 kvm_register_write(vcpu
, VCPU_REGS_R8
, regs
->r8
);
5430 kvm_register_write(vcpu
, VCPU_REGS_R9
, regs
->r9
);
5431 kvm_register_write(vcpu
, VCPU_REGS_R10
, regs
->r10
);
5432 kvm_register_write(vcpu
, VCPU_REGS_R11
, regs
->r11
);
5433 kvm_register_write(vcpu
, VCPU_REGS_R12
, regs
->r12
);
5434 kvm_register_write(vcpu
, VCPU_REGS_R13
, regs
->r13
);
5435 kvm_register_write(vcpu
, VCPU_REGS_R14
, regs
->r14
);
5436 kvm_register_write(vcpu
, VCPU_REGS_R15
, regs
->r15
);
5439 kvm_rip_write(vcpu
, regs
->rip
);
5440 kvm_set_rflags(vcpu
, regs
->rflags
);
5442 vcpu
->arch
.exception
.pending
= false;
5444 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
5449 void kvm_get_cs_db_l_bits(struct kvm_vcpu
*vcpu
, int *db
, int *l
)
5451 struct kvm_segment cs
;
5453 kvm_get_segment(vcpu
, &cs
, VCPU_SREG_CS
);
5457 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits
);
5459 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
5460 struct kvm_sregs
*sregs
)
5464 kvm_get_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
5465 kvm_get_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
5466 kvm_get_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
5467 kvm_get_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
5468 kvm_get_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
5469 kvm_get_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
5471 kvm_get_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
5472 kvm_get_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
5474 kvm_x86_ops
->get_idt(vcpu
, &dt
);
5475 sregs
->idt
.limit
= dt
.size
;
5476 sregs
->idt
.base
= dt
.address
;
5477 kvm_x86_ops
->get_gdt(vcpu
, &dt
);
5478 sregs
->gdt
.limit
= dt
.size
;
5479 sregs
->gdt
.base
= dt
.address
;
5481 sregs
->cr0
= kvm_read_cr0(vcpu
);
5482 sregs
->cr2
= vcpu
->arch
.cr2
;
5483 sregs
->cr3
= vcpu
->arch
.cr3
;
5484 sregs
->cr4
= kvm_read_cr4(vcpu
);
5485 sregs
->cr8
= kvm_get_cr8(vcpu
);
5486 sregs
->efer
= vcpu
->arch
.efer
;
5487 sregs
->apic_base
= kvm_get_apic_base(vcpu
);
5489 memset(sregs
->interrupt_bitmap
, 0, sizeof sregs
->interrupt_bitmap
);
5491 if (vcpu
->arch
.interrupt
.pending
&& !vcpu
->arch
.interrupt
.soft
)
5492 set_bit(vcpu
->arch
.interrupt
.nr
,
5493 (unsigned long *)sregs
->interrupt_bitmap
);
5498 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
5499 struct kvm_mp_state
*mp_state
)
5501 mp_state
->mp_state
= vcpu
->arch
.mp_state
;
5505 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
5506 struct kvm_mp_state
*mp_state
)
5508 vcpu
->arch
.mp_state
= mp_state
->mp_state
;
5509 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
5513 int kvm_task_switch(struct kvm_vcpu
*vcpu
, u16 tss_selector
, int reason
,
5514 bool has_error_code
, u32 error_code
)
5516 struct decode_cache
*c
= &vcpu
->arch
.emulate_ctxt
.decode
;
5519 init_emulate_ctxt(vcpu
);
5521 ret
= emulator_task_switch(&vcpu
->arch
.emulate_ctxt
,
5522 tss_selector
, reason
, has_error_code
,
5526 return EMULATE_FAIL
;
5528 memcpy(vcpu
->arch
.regs
, c
->regs
, sizeof c
->regs
);
5529 kvm_rip_write(vcpu
, vcpu
->arch
.emulate_ctxt
.eip
);
5530 kvm_x86_ops
->set_rflags(vcpu
, vcpu
->arch
.emulate_ctxt
.eflags
);
5531 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
5532 return EMULATE_DONE
;
5534 EXPORT_SYMBOL_GPL(kvm_task_switch
);
5536 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
5537 struct kvm_sregs
*sregs
)
5539 int mmu_reset_needed
= 0;
5540 int pending_vec
, max_bits
;
5543 dt
.size
= sregs
->idt
.limit
;
5544 dt
.address
= sregs
->idt
.base
;
5545 kvm_x86_ops
->set_idt(vcpu
, &dt
);
5546 dt
.size
= sregs
->gdt
.limit
;
5547 dt
.address
= sregs
->gdt
.base
;
5548 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
5550 vcpu
->arch
.cr2
= sregs
->cr2
;
5551 mmu_reset_needed
|= vcpu
->arch
.cr3
!= sregs
->cr3
;
5552 vcpu
->arch
.cr3
= sregs
->cr3
;
5554 kvm_set_cr8(vcpu
, sregs
->cr8
);
5556 mmu_reset_needed
|= vcpu
->arch
.efer
!= sregs
->efer
;
5557 kvm_x86_ops
->set_efer(vcpu
, sregs
->efer
);
5558 kvm_set_apic_base(vcpu
, sregs
->apic_base
);
5560 mmu_reset_needed
|= kvm_read_cr0(vcpu
) != sregs
->cr0
;
5561 kvm_x86_ops
->set_cr0(vcpu
, sregs
->cr0
);
5562 vcpu
->arch
.cr0
= sregs
->cr0
;
5564 mmu_reset_needed
|= kvm_read_cr4(vcpu
) != sregs
->cr4
;
5565 kvm_x86_ops
->set_cr4(vcpu
, sregs
->cr4
);
5566 if (sregs
->cr4
& X86_CR4_OSXSAVE
)
5568 if (!is_long_mode(vcpu
) && is_pae(vcpu
)) {
5569 load_pdptrs(vcpu
, vcpu
->arch
.walk_mmu
, vcpu
->arch
.cr3
);
5570 mmu_reset_needed
= 1;
5573 if (mmu_reset_needed
)
5574 kvm_mmu_reset_context(vcpu
);
5576 max_bits
= (sizeof sregs
->interrupt_bitmap
) << 3;
5577 pending_vec
= find_first_bit(
5578 (const unsigned long *)sregs
->interrupt_bitmap
, max_bits
);
5579 if (pending_vec
< max_bits
) {
5580 kvm_queue_interrupt(vcpu
, pending_vec
, false);
5581 pr_debug("Set back pending irq %d\n", pending_vec
);
5582 if (irqchip_in_kernel(vcpu
->kvm
))
5583 kvm_pic_clear_isr_ack(vcpu
->kvm
);
5586 kvm_set_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
5587 kvm_set_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
5588 kvm_set_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
5589 kvm_set_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
5590 kvm_set_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
5591 kvm_set_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
5593 kvm_set_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
5594 kvm_set_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
5596 update_cr8_intercept(vcpu
);
5598 /* Older userspace won't unhalt the vcpu on reset. */
5599 if (kvm_vcpu_is_bsp(vcpu
) && kvm_rip_read(vcpu
) == 0xfff0 &&
5600 sregs
->cs
.selector
== 0xf000 && sregs
->cs
.base
== 0xffff0000 &&
5602 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
5604 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
5609 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
5610 struct kvm_guest_debug
*dbg
)
5612 unsigned long rflags
;
5615 if (dbg
->control
& (KVM_GUESTDBG_INJECT_DB
| KVM_GUESTDBG_INJECT_BP
)) {
5617 if (vcpu
->arch
.exception
.pending
)
5619 if (dbg
->control
& KVM_GUESTDBG_INJECT_DB
)
5620 kvm_queue_exception(vcpu
, DB_VECTOR
);
5622 kvm_queue_exception(vcpu
, BP_VECTOR
);
5626 * Read rflags as long as potentially injected trace flags are still
5629 rflags
= kvm_get_rflags(vcpu
);
5631 vcpu
->guest_debug
= dbg
->control
;
5632 if (!(vcpu
->guest_debug
& KVM_GUESTDBG_ENABLE
))
5633 vcpu
->guest_debug
= 0;
5635 if (vcpu
->guest_debug
& KVM_GUESTDBG_USE_HW_BP
) {
5636 for (i
= 0; i
< KVM_NR_DB_REGS
; ++i
)
5637 vcpu
->arch
.eff_db
[i
] = dbg
->arch
.debugreg
[i
];
5638 vcpu
->arch
.switch_db_regs
=
5639 (dbg
->arch
.debugreg
[7] & DR7_BP_EN_MASK
);
5641 for (i
= 0; i
< KVM_NR_DB_REGS
; i
++)
5642 vcpu
->arch
.eff_db
[i
] = vcpu
->arch
.db
[i
];
5643 vcpu
->arch
.switch_db_regs
= (vcpu
->arch
.dr7
& DR7_BP_EN_MASK
);
5646 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
)
5647 vcpu
->arch
.singlestep_rip
= kvm_rip_read(vcpu
) +
5648 get_segment_base(vcpu
, VCPU_SREG_CS
);
5651 * Trigger an rflags update that will inject or remove the trace
5654 kvm_set_rflags(vcpu
, rflags
);
5656 kvm_x86_ops
->set_guest_debug(vcpu
, dbg
);
5666 * Translate a guest virtual address to a guest physical address.
5668 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
5669 struct kvm_translation
*tr
)
5671 unsigned long vaddr
= tr
->linear_address
;
5675 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
5676 gpa
= kvm_mmu_gva_to_gpa_system(vcpu
, vaddr
, NULL
);
5677 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
5678 tr
->physical_address
= gpa
;
5679 tr
->valid
= gpa
!= UNMAPPED_GVA
;
5686 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
5688 struct i387_fxsave_struct
*fxsave
=
5689 &vcpu
->arch
.guest_fpu
.state
->fxsave
;
5691 memcpy(fpu
->fpr
, fxsave
->st_space
, 128);
5692 fpu
->fcw
= fxsave
->cwd
;
5693 fpu
->fsw
= fxsave
->swd
;
5694 fpu
->ftwx
= fxsave
->twd
;
5695 fpu
->last_opcode
= fxsave
->fop
;
5696 fpu
->last_ip
= fxsave
->rip
;
5697 fpu
->last_dp
= fxsave
->rdp
;
5698 memcpy(fpu
->xmm
, fxsave
->xmm_space
, sizeof fxsave
->xmm_space
);
5703 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
5705 struct i387_fxsave_struct
*fxsave
=
5706 &vcpu
->arch
.guest_fpu
.state
->fxsave
;
5708 memcpy(fxsave
->st_space
, fpu
->fpr
, 128);
5709 fxsave
->cwd
= fpu
->fcw
;
5710 fxsave
->swd
= fpu
->fsw
;
5711 fxsave
->twd
= fpu
->ftwx
;
5712 fxsave
->fop
= fpu
->last_opcode
;
5713 fxsave
->rip
= fpu
->last_ip
;
5714 fxsave
->rdp
= fpu
->last_dp
;
5715 memcpy(fxsave
->xmm_space
, fpu
->xmm
, sizeof fxsave
->xmm_space
);
5720 int fx_init(struct kvm_vcpu
*vcpu
)
5724 err
= fpu_alloc(&vcpu
->arch
.guest_fpu
);
5728 fpu_finit(&vcpu
->arch
.guest_fpu
);
5731 * Ensure guest xcr0 is valid for loading
5733 vcpu
->arch
.xcr0
= XSTATE_FP
;
5735 vcpu
->arch
.cr0
|= X86_CR0_ET
;
5739 EXPORT_SYMBOL_GPL(fx_init
);
5741 static void fx_free(struct kvm_vcpu
*vcpu
)
5743 fpu_free(&vcpu
->arch
.guest_fpu
);
5746 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
)
5748 if (vcpu
->guest_fpu_loaded
)
5752 * Restore all possible states in the guest,
5753 * and assume host would use all available bits.
5754 * Guest xcr0 would be loaded later.
5756 kvm_put_guest_xcr0(vcpu
);
5757 vcpu
->guest_fpu_loaded
= 1;
5758 unlazy_fpu(current
);
5759 fpu_restore_checking(&vcpu
->arch
.guest_fpu
);
5763 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
)
5765 kvm_put_guest_xcr0(vcpu
);
5767 if (!vcpu
->guest_fpu_loaded
)
5770 vcpu
->guest_fpu_loaded
= 0;
5771 fpu_save_init(&vcpu
->arch
.guest_fpu
);
5772 ++vcpu
->stat
.fpu_reload
;
5773 kvm_make_request(KVM_REQ_DEACTIVATE_FPU
, vcpu
);
5777 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
)
5779 if (vcpu
->arch
.time_page
) {
5780 kvm_release_page_dirty(vcpu
->arch
.time_page
);
5781 vcpu
->arch
.time_page
= NULL
;
5784 free_cpumask_var(vcpu
->arch
.wbinvd_dirty_mask
);
5786 kvm_x86_ops
->vcpu_free(vcpu
);
5789 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
,
5792 if (check_tsc_unstable() && atomic_read(&kvm
->online_vcpus
) != 0)
5793 printk_once(KERN_WARNING
5794 "kvm: SMP vm created on host with unstable TSC; "
5795 "guest TSC will not be reliable\n");
5796 return kvm_x86_ops
->vcpu_create(kvm
, id
);
5799 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
)
5803 vcpu
->arch
.mtrr_state
.have_fixed
= 1;
5805 r
= kvm_arch_vcpu_reset(vcpu
);
5807 r
= kvm_mmu_setup(vcpu
);
5814 kvm_x86_ops
->vcpu_free(vcpu
);
5818 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
)
5820 vcpu
->arch
.apf
.msr_val
= 0;
5823 kvm_mmu_unload(vcpu
);
5827 kvm_x86_ops
->vcpu_free(vcpu
);
5830 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
)
5832 vcpu
->arch
.nmi_pending
= false;
5833 vcpu
->arch
.nmi_injected
= false;
5835 vcpu
->arch
.switch_db_regs
= 0;
5836 memset(vcpu
->arch
.db
, 0, sizeof(vcpu
->arch
.db
));
5837 vcpu
->arch
.dr6
= DR6_FIXED_1
;
5838 vcpu
->arch
.dr7
= DR7_FIXED_1
;
5840 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
5841 vcpu
->arch
.apf
.msr_val
= 0;
5843 kvm_clear_async_pf_completion_queue(vcpu
);
5844 kvm_async_pf_hash_reset(vcpu
);
5845 vcpu
->arch
.apf
.halted
= false;
5847 return kvm_x86_ops
->vcpu_reset(vcpu
);
5850 int kvm_arch_hardware_enable(void *garbage
)
5853 struct kvm_vcpu
*vcpu
;
5856 kvm_shared_msr_cpu_online();
5857 list_for_each_entry(kvm
, &vm_list
, vm_list
)
5858 kvm_for_each_vcpu(i
, vcpu
, kvm
)
5859 if (vcpu
->cpu
== smp_processor_id())
5860 kvm_make_request(KVM_REQ_CLOCK_UPDATE
, vcpu
);
5861 return kvm_x86_ops
->hardware_enable(garbage
);
5864 void kvm_arch_hardware_disable(void *garbage
)
5866 kvm_x86_ops
->hardware_disable(garbage
);
5867 drop_user_return_notifiers(garbage
);
5870 int kvm_arch_hardware_setup(void)
5872 return kvm_x86_ops
->hardware_setup();
5875 void kvm_arch_hardware_unsetup(void)
5877 kvm_x86_ops
->hardware_unsetup();
5880 void kvm_arch_check_processor_compat(void *rtn
)
5882 kvm_x86_ops
->check_processor_compatibility(rtn
);
5885 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
)
5891 BUG_ON(vcpu
->kvm
== NULL
);
5894 vcpu
->arch
.emulate_ctxt
.ops
= &emulate_ops
;
5895 vcpu
->arch
.walk_mmu
= &vcpu
->arch
.mmu
;
5896 vcpu
->arch
.mmu
.root_hpa
= INVALID_PAGE
;
5897 vcpu
->arch
.mmu
.translate_gpa
= translate_gpa
;
5898 vcpu
->arch
.nested_mmu
.translate_gpa
= translate_nested_gpa
;
5899 if (!irqchip_in_kernel(kvm
) || kvm_vcpu_is_bsp(vcpu
))
5900 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
5902 vcpu
->arch
.mp_state
= KVM_MP_STATE_UNINITIALIZED
;
5904 page
= alloc_page(GFP_KERNEL
| __GFP_ZERO
);
5909 vcpu
->arch
.pio_data
= page_address(page
);
5911 if (!kvm
->arch
.virtual_tsc_khz
)
5912 kvm_arch_set_tsc_khz(kvm
, max_tsc_khz
);
5914 r
= kvm_mmu_create(vcpu
);
5916 goto fail_free_pio_data
;
5918 if (irqchip_in_kernel(kvm
)) {
5919 r
= kvm_create_lapic(vcpu
);
5921 goto fail_mmu_destroy
;
5924 vcpu
->arch
.mce_banks
= kzalloc(KVM_MAX_MCE_BANKS
* sizeof(u64
) * 4,
5926 if (!vcpu
->arch
.mce_banks
) {
5928 goto fail_free_lapic
;
5930 vcpu
->arch
.mcg_cap
= KVM_MAX_MCE_BANKS
;
5932 if (!zalloc_cpumask_var(&vcpu
->arch
.wbinvd_dirty_mask
, GFP_KERNEL
))
5933 goto fail_free_mce_banks
;
5935 kvm_async_pf_hash_reset(vcpu
);
5938 fail_free_mce_banks
:
5939 kfree(vcpu
->arch
.mce_banks
);
5941 kvm_free_lapic(vcpu
);
5943 kvm_mmu_destroy(vcpu
);
5945 free_page((unsigned long)vcpu
->arch
.pio_data
);
5950 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
)
5954 kfree(vcpu
->arch
.mce_banks
);
5955 kvm_free_lapic(vcpu
);
5956 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
5957 kvm_mmu_destroy(vcpu
);
5958 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
5959 free_page((unsigned long)vcpu
->arch
.pio_data
);
5962 struct kvm
*kvm_arch_create_vm(void)
5964 struct kvm
*kvm
= kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
5967 return ERR_PTR(-ENOMEM
);
5969 INIT_LIST_HEAD(&kvm
->arch
.active_mmu_pages
);
5970 INIT_LIST_HEAD(&kvm
->arch
.assigned_dev_head
);
5972 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
5973 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID
, &kvm
->arch
.irq_sources_bitmap
);
5975 spin_lock_init(&kvm
->arch
.tsc_write_lock
);
5980 static void kvm_unload_vcpu_mmu(struct kvm_vcpu
*vcpu
)
5983 kvm_mmu_unload(vcpu
);
5987 static void kvm_free_vcpus(struct kvm
*kvm
)
5990 struct kvm_vcpu
*vcpu
;
5993 * Unpin any mmu pages first.
5995 kvm_for_each_vcpu(i
, vcpu
, kvm
) {
5996 kvm_clear_async_pf_completion_queue(vcpu
);
5997 kvm_unload_vcpu_mmu(vcpu
);
5999 kvm_for_each_vcpu(i
, vcpu
, kvm
)
6000 kvm_arch_vcpu_free(vcpu
);
6002 mutex_lock(&kvm
->lock
);
6003 for (i
= 0; i
< atomic_read(&kvm
->online_vcpus
); i
++)
6004 kvm
->vcpus
[i
] = NULL
;
6006 atomic_set(&kvm
->online_vcpus
, 0);
6007 mutex_unlock(&kvm
->lock
);
6010 void kvm_arch_sync_events(struct kvm
*kvm
)
6012 kvm_free_all_assigned_devices(kvm
);
6016 void kvm_arch_destroy_vm(struct kvm
*kvm
)
6018 kvm_iommu_unmap_guest(kvm
);
6019 kfree(kvm
->arch
.vpic
);
6020 kfree(kvm
->arch
.vioapic
);
6021 kvm_free_vcpus(kvm
);
6022 kvm_free_physmem(kvm
);
6023 if (kvm
->arch
.apic_access_page
)
6024 put_page(kvm
->arch
.apic_access_page
);
6025 if (kvm
->arch
.ept_identity_pagetable
)
6026 put_page(kvm
->arch
.ept_identity_pagetable
);
6027 cleanup_srcu_struct(&kvm
->srcu
);
6031 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
6032 struct kvm_memory_slot
*memslot
,
6033 struct kvm_memory_slot old
,
6034 struct kvm_userspace_memory_region
*mem
,
6037 int npages
= memslot
->npages
;
6038 int map_flags
= MAP_PRIVATE
| MAP_ANONYMOUS
;
6040 /* Prevent internal slot pages from being moved by fork()/COW. */
6041 if (memslot
->id
>= KVM_MEMORY_SLOTS
)
6042 map_flags
= MAP_SHARED
| MAP_ANONYMOUS
;
6044 /*To keep backward compatibility with older userspace,
6045 *x86 needs to hanlde !user_alloc case.
6048 if (npages
&& !old
.rmap
) {
6049 unsigned long userspace_addr
;
6051 down_write(¤t
->mm
->mmap_sem
);
6052 userspace_addr
= do_mmap(NULL
, 0,
6054 PROT_READ
| PROT_WRITE
,
6057 up_write(¤t
->mm
->mmap_sem
);
6059 if (IS_ERR((void *)userspace_addr
))
6060 return PTR_ERR((void *)userspace_addr
);
6062 memslot
->userspace_addr
= userspace_addr
;
6070 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
6071 struct kvm_userspace_memory_region
*mem
,
6072 struct kvm_memory_slot old
,
6076 int npages
= mem
->memory_size
>> PAGE_SHIFT
;
6078 if (!user_alloc
&& !old
.user_alloc
&& old
.rmap
&& !npages
) {
6081 down_write(¤t
->mm
->mmap_sem
);
6082 ret
= do_munmap(current
->mm
, old
.userspace_addr
,
6083 old
.npages
* PAGE_SIZE
);
6084 up_write(¤t
->mm
->mmap_sem
);
6087 "kvm_vm_ioctl_set_memory_region: "
6088 "failed to munmap memory\n");
6091 spin_lock(&kvm
->mmu_lock
);
6092 if (!kvm
->arch
.n_requested_mmu_pages
) {
6093 unsigned int nr_mmu_pages
= kvm_mmu_calculate_mmu_pages(kvm
);
6094 kvm_mmu_change_mmu_pages(kvm
, nr_mmu_pages
);
6097 kvm_mmu_slot_remove_write_access(kvm
, mem
->slot
);
6098 spin_unlock(&kvm
->mmu_lock
);
6101 void kvm_arch_flush_shadow(struct kvm
*kvm
)
6103 kvm_mmu_zap_all(kvm
);
6104 kvm_reload_remote_mmus(kvm
);
6107 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
)
6109 return (vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
&&
6110 !vcpu
->arch
.apf
.halted
)
6111 || !list_empty_careful(&vcpu
->async_pf
.done
)
6112 || vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
6113 || vcpu
->arch
.nmi_pending
||
6114 (kvm_arch_interrupt_allowed(vcpu
) &&
6115 kvm_cpu_has_interrupt(vcpu
));
6118 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
)
6121 int cpu
= vcpu
->cpu
;
6123 if (waitqueue_active(&vcpu
->wq
)) {
6124 wake_up_interruptible(&vcpu
->wq
);
6125 ++vcpu
->stat
.halt_wakeup
;
6129 if (cpu
!= me
&& (unsigned)cpu
< nr_cpu_ids
&& cpu_online(cpu
))
6130 if (atomic_xchg(&vcpu
->guest_mode
, 0))
6131 smp_send_reschedule(cpu
);
6135 int kvm_arch_interrupt_allowed(struct kvm_vcpu
*vcpu
)
6137 return kvm_x86_ops
->interrupt_allowed(vcpu
);
6140 bool kvm_is_linear_rip(struct kvm_vcpu
*vcpu
, unsigned long linear_rip
)
6142 unsigned long current_rip
= kvm_rip_read(vcpu
) +
6143 get_segment_base(vcpu
, VCPU_SREG_CS
);
6145 return current_rip
== linear_rip
;
6147 EXPORT_SYMBOL_GPL(kvm_is_linear_rip
);
6149 unsigned long kvm_get_rflags(struct kvm_vcpu
*vcpu
)
6151 unsigned long rflags
;
6153 rflags
= kvm_x86_ops
->get_rflags(vcpu
);
6154 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
)
6155 rflags
&= ~X86_EFLAGS_TF
;
6158 EXPORT_SYMBOL_GPL(kvm_get_rflags
);
6160 void kvm_set_rflags(struct kvm_vcpu
*vcpu
, unsigned long rflags
)
6162 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
&&
6163 kvm_is_linear_rip(vcpu
, vcpu
->arch
.singlestep_rip
))
6164 rflags
|= X86_EFLAGS_TF
;
6165 kvm_x86_ops
->set_rflags(vcpu
, rflags
);
6166 kvm_make_request(KVM_REQ_EVENT
, vcpu
);
6168 EXPORT_SYMBOL_GPL(kvm_set_rflags
);
6170 void kvm_arch_async_page_ready(struct kvm_vcpu
*vcpu
, struct kvm_async_pf
*work
)
6174 if (!vcpu
->arch
.mmu
.direct_map
|| is_error_page(work
->page
))
6177 r
= kvm_mmu_reload(vcpu
);
6181 vcpu
->arch
.mmu
.page_fault(vcpu
, work
->gva
, 0, true);
6184 static inline u32
kvm_async_pf_hash_fn(gfn_t gfn
)
6186 return hash_32(gfn
& 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU
));
6189 static inline u32
kvm_async_pf_next_probe(u32 key
)
6191 return (key
+ 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU
) - 1);
6194 static void kvm_add_async_pf_gfn(struct kvm_vcpu
*vcpu
, gfn_t gfn
)
6196 u32 key
= kvm_async_pf_hash_fn(gfn
);
6198 while (vcpu
->arch
.apf
.gfns
[key
] != ~0)
6199 key
= kvm_async_pf_next_probe(key
);
6201 vcpu
->arch
.apf
.gfns
[key
] = gfn
;
6204 static u32
kvm_async_pf_gfn_slot(struct kvm_vcpu
*vcpu
, gfn_t gfn
)
6207 u32 key
= kvm_async_pf_hash_fn(gfn
);
6209 for (i
= 0; i
< roundup_pow_of_two(ASYNC_PF_PER_VCPU
) &&
6210 (vcpu
->arch
.apf
.gfns
[key
] != gfn
||
6211 vcpu
->arch
.apf
.gfns
[key
] == ~0); i
++)
6212 key
= kvm_async_pf_next_probe(key
);
6217 bool kvm_find_async_pf_gfn(struct kvm_vcpu
*vcpu
, gfn_t gfn
)
6219 return vcpu
->arch
.apf
.gfns
[kvm_async_pf_gfn_slot(vcpu
, gfn
)] == gfn
;
6222 static void kvm_del_async_pf_gfn(struct kvm_vcpu
*vcpu
, gfn_t gfn
)
6226 i
= j
= kvm_async_pf_gfn_slot(vcpu
, gfn
);
6228 vcpu
->arch
.apf
.gfns
[i
] = ~0;
6230 j
= kvm_async_pf_next_probe(j
);
6231 if (vcpu
->arch
.apf
.gfns
[j
] == ~0)
6233 k
= kvm_async_pf_hash_fn(vcpu
->arch
.apf
.gfns
[j
]);
6235 * k lies cyclically in ]i,j]
6237 * |....j i.k.| or |.k..j i...|
6239 } while ((i
<= j
) ? (i
< k
&& k
<= j
) : (i
< k
|| k
<= j
));
6240 vcpu
->arch
.apf
.gfns
[i
] = vcpu
->arch
.apf
.gfns
[j
];
6245 static int apf_put_user(struct kvm_vcpu
*vcpu
, u32 val
)
6248 return kvm_write_guest_cached(vcpu
->kvm
, &vcpu
->arch
.apf
.data
, &val
,
6252 void kvm_arch_async_page_not_present(struct kvm_vcpu
*vcpu
,
6253 struct kvm_async_pf
*work
)
6255 trace_kvm_async_pf_not_present(work
->arch
.token
, work
->gva
);
6256 kvm_add_async_pf_gfn(vcpu
, work
->arch
.gfn
);
6258 if (!(vcpu
->arch
.apf
.msr_val
& KVM_ASYNC_PF_ENABLED
) ||
6259 (vcpu
->arch
.apf
.send_user_only
&&
6260 kvm_x86_ops
->get_cpl(vcpu
) == 0))
6261 kvm_make_request(KVM_REQ_APF_HALT
, vcpu
);
6262 else if (!apf_put_user(vcpu
, KVM_PV_REASON_PAGE_NOT_PRESENT
)) {
6263 vcpu
->arch
.fault
.error_code
= 0;
6264 vcpu
->arch
.fault
.address
= work
->arch
.token
;
6265 kvm_inject_page_fault(vcpu
);
6269 void kvm_arch_async_page_present(struct kvm_vcpu
*vcpu
,
6270 struct kvm_async_pf
*work
)
6272 trace_kvm_async_pf_ready(work
->arch
.token
, work
->gva
);
6273 if (is_error_page(work
->page
))
6274 work
->arch
.token
= ~0; /* broadcast wakeup */
6276 kvm_del_async_pf_gfn(vcpu
, work
->arch
.gfn
);
6278 if ((vcpu
->arch
.apf
.msr_val
& KVM_ASYNC_PF_ENABLED
) &&
6279 !apf_put_user(vcpu
, KVM_PV_REASON_PAGE_READY
)) {
6280 vcpu
->arch
.fault
.error_code
= 0;
6281 vcpu
->arch
.fault
.address
= work
->arch
.token
;
6282 kvm_inject_page_fault(vcpu
);
6286 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu
*vcpu
)
6288 if (!(vcpu
->arch
.apf
.msr_val
& KVM_ASYNC_PF_ENABLED
))
6291 return !kvm_event_needs_reinjection(vcpu
) &&
6292 kvm_x86_ops
->interrupt_allowed(vcpu
);
6295 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit
);
6296 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq
);
6297 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault
);
6298 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr
);
6299 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr
);
6300 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun
);
6301 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit
);
6302 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject
);
6303 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit
);
6304 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga
);
6305 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit
);
6306 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts
);