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 affilates.
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 <trace/events/kvm.h>
48 #define CREATE_TRACE_POINTS
51 #include <asm/debugreg.h>
59 #define MAX_IO_MSRS 256
60 #define CR0_RESERVED_BITS \
61 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
62 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
63 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
64 #define CR4_RESERVED_BITS \
65 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
66 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
67 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
69 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
71 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
73 #define KVM_MAX_MCE_BANKS 32
74 #define KVM_MCE_CAP_SUPPORTED MCG_CTL_P
77 * - enable syscall per default because its emulated by KVM
78 * - enable LME and LMA per default on 64 bit KVM
81 static u64 __read_mostly efer_reserved_bits
= 0xfffffffffffffafeULL
;
83 static u64 __read_mostly efer_reserved_bits
= 0xfffffffffffffffeULL
;
86 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
87 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
89 static void update_cr8_intercept(struct kvm_vcpu
*vcpu
);
90 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2
*cpuid
,
91 struct kvm_cpuid_entry2 __user
*entries
);
93 struct kvm_x86_ops
*kvm_x86_ops
;
94 EXPORT_SYMBOL_GPL(kvm_x86_ops
);
97 module_param_named(ignore_msrs
, ignore_msrs
, bool, S_IRUGO
| S_IWUSR
);
99 #define KVM_NR_SHARED_MSRS 16
101 struct kvm_shared_msrs_global
{
103 u32 msrs
[KVM_NR_SHARED_MSRS
];
106 struct kvm_shared_msrs
{
107 struct user_return_notifier urn
;
109 struct kvm_shared_msr_values
{
112 } values
[KVM_NR_SHARED_MSRS
];
115 static struct kvm_shared_msrs_global __read_mostly shared_msrs_global
;
116 static DEFINE_PER_CPU(struct kvm_shared_msrs
, shared_msrs
);
118 struct kvm_stats_debugfs_item debugfs_entries
[] = {
119 { "pf_fixed", VCPU_STAT(pf_fixed
) },
120 { "pf_guest", VCPU_STAT(pf_guest
) },
121 { "tlb_flush", VCPU_STAT(tlb_flush
) },
122 { "invlpg", VCPU_STAT(invlpg
) },
123 { "exits", VCPU_STAT(exits
) },
124 { "io_exits", VCPU_STAT(io_exits
) },
125 { "mmio_exits", VCPU_STAT(mmio_exits
) },
126 { "signal_exits", VCPU_STAT(signal_exits
) },
127 { "irq_window", VCPU_STAT(irq_window_exits
) },
128 { "nmi_window", VCPU_STAT(nmi_window_exits
) },
129 { "halt_exits", VCPU_STAT(halt_exits
) },
130 { "halt_wakeup", VCPU_STAT(halt_wakeup
) },
131 { "hypercalls", VCPU_STAT(hypercalls
) },
132 { "request_irq", VCPU_STAT(request_irq_exits
) },
133 { "irq_exits", VCPU_STAT(irq_exits
) },
134 { "host_state_reload", VCPU_STAT(host_state_reload
) },
135 { "efer_reload", VCPU_STAT(efer_reload
) },
136 { "fpu_reload", VCPU_STAT(fpu_reload
) },
137 { "insn_emulation", VCPU_STAT(insn_emulation
) },
138 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail
) },
139 { "irq_injections", VCPU_STAT(irq_injections
) },
140 { "nmi_injections", VCPU_STAT(nmi_injections
) },
141 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped
) },
142 { "mmu_pte_write", VM_STAT(mmu_pte_write
) },
143 { "mmu_pte_updated", VM_STAT(mmu_pte_updated
) },
144 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped
) },
145 { "mmu_flooded", VM_STAT(mmu_flooded
) },
146 { "mmu_recycled", VM_STAT(mmu_recycled
) },
147 { "mmu_cache_miss", VM_STAT(mmu_cache_miss
) },
148 { "mmu_unsync", VM_STAT(mmu_unsync
) },
149 { "remote_tlb_flush", VM_STAT(remote_tlb_flush
) },
150 { "largepages", VM_STAT(lpages
) },
154 u64 __read_mostly host_xcr0
;
156 static inline u32
bit(int bitno
)
158 return 1 << (bitno
& 31);
161 static void kvm_on_user_return(struct user_return_notifier
*urn
)
164 struct kvm_shared_msrs
*locals
165 = container_of(urn
, struct kvm_shared_msrs
, urn
);
166 struct kvm_shared_msr_values
*values
;
168 for (slot
= 0; slot
< shared_msrs_global
.nr
; ++slot
) {
169 values
= &locals
->values
[slot
];
170 if (values
->host
!= values
->curr
) {
171 wrmsrl(shared_msrs_global
.msrs
[slot
], values
->host
);
172 values
->curr
= values
->host
;
175 locals
->registered
= false;
176 user_return_notifier_unregister(urn
);
179 static void shared_msr_update(unsigned slot
, u32 msr
)
181 struct kvm_shared_msrs
*smsr
;
184 smsr
= &__get_cpu_var(shared_msrs
);
185 /* only read, and nobody should modify it at this time,
186 * so don't need lock */
187 if (slot
>= shared_msrs_global
.nr
) {
188 printk(KERN_ERR
"kvm: invalid MSR slot!");
191 rdmsrl_safe(msr
, &value
);
192 smsr
->values
[slot
].host
= value
;
193 smsr
->values
[slot
].curr
= value
;
196 void kvm_define_shared_msr(unsigned slot
, u32 msr
)
198 if (slot
>= shared_msrs_global
.nr
)
199 shared_msrs_global
.nr
= slot
+ 1;
200 shared_msrs_global
.msrs
[slot
] = msr
;
201 /* we need ensured the shared_msr_global have been updated */
204 EXPORT_SYMBOL_GPL(kvm_define_shared_msr
);
206 static void kvm_shared_msr_cpu_online(void)
210 for (i
= 0; i
< shared_msrs_global
.nr
; ++i
)
211 shared_msr_update(i
, shared_msrs_global
.msrs
[i
]);
214 void kvm_set_shared_msr(unsigned slot
, u64 value
, u64 mask
)
216 struct kvm_shared_msrs
*smsr
= &__get_cpu_var(shared_msrs
);
218 if (((value
^ smsr
->values
[slot
].curr
) & mask
) == 0)
220 smsr
->values
[slot
].curr
= value
;
221 wrmsrl(shared_msrs_global
.msrs
[slot
], value
);
222 if (!smsr
->registered
) {
223 smsr
->urn
.on_user_return
= kvm_on_user_return
;
224 user_return_notifier_register(&smsr
->urn
);
225 smsr
->registered
= true;
228 EXPORT_SYMBOL_GPL(kvm_set_shared_msr
);
230 static void drop_user_return_notifiers(void *ignore
)
232 struct kvm_shared_msrs
*smsr
= &__get_cpu_var(shared_msrs
);
234 if (smsr
->registered
)
235 kvm_on_user_return(&smsr
->urn
);
238 u64
kvm_get_apic_base(struct kvm_vcpu
*vcpu
)
240 if (irqchip_in_kernel(vcpu
->kvm
))
241 return vcpu
->arch
.apic_base
;
243 return vcpu
->arch
.apic_base
;
245 EXPORT_SYMBOL_GPL(kvm_get_apic_base
);
247 void kvm_set_apic_base(struct kvm_vcpu
*vcpu
, u64 data
)
249 /* TODO: reserve bits check */
250 if (irqchip_in_kernel(vcpu
->kvm
))
251 kvm_lapic_set_base(vcpu
, data
);
253 vcpu
->arch
.apic_base
= data
;
255 EXPORT_SYMBOL_GPL(kvm_set_apic_base
);
257 #define EXCPT_BENIGN 0
258 #define EXCPT_CONTRIBUTORY 1
261 static int exception_class(int vector
)
271 return EXCPT_CONTRIBUTORY
;
278 static void kvm_multiple_exception(struct kvm_vcpu
*vcpu
,
279 unsigned nr
, bool has_error
, u32 error_code
,
285 if (!vcpu
->arch
.exception
.pending
) {
287 vcpu
->arch
.exception
.pending
= true;
288 vcpu
->arch
.exception
.has_error_code
= has_error
;
289 vcpu
->arch
.exception
.nr
= nr
;
290 vcpu
->arch
.exception
.error_code
= error_code
;
291 vcpu
->arch
.exception
.reinject
= reinject
;
295 /* to check exception */
296 prev_nr
= vcpu
->arch
.exception
.nr
;
297 if (prev_nr
== DF_VECTOR
) {
298 /* triple fault -> shutdown */
299 set_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
);
302 class1
= exception_class(prev_nr
);
303 class2
= exception_class(nr
);
304 if ((class1
== EXCPT_CONTRIBUTORY
&& class2
== EXCPT_CONTRIBUTORY
)
305 || (class1
== EXCPT_PF
&& class2
!= EXCPT_BENIGN
)) {
306 /* generate double fault per SDM Table 5-5 */
307 vcpu
->arch
.exception
.pending
= true;
308 vcpu
->arch
.exception
.has_error_code
= true;
309 vcpu
->arch
.exception
.nr
= DF_VECTOR
;
310 vcpu
->arch
.exception
.error_code
= 0;
312 /* replace previous exception with a new one in a hope
313 that instruction re-execution will regenerate lost
318 void kvm_queue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
)
320 kvm_multiple_exception(vcpu
, nr
, false, 0, false);
322 EXPORT_SYMBOL_GPL(kvm_queue_exception
);
324 void kvm_requeue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
)
326 kvm_multiple_exception(vcpu
, nr
, false, 0, true);
328 EXPORT_SYMBOL_GPL(kvm_requeue_exception
);
330 void kvm_inject_page_fault(struct kvm_vcpu
*vcpu
, unsigned long addr
,
333 ++vcpu
->stat
.pf_guest
;
334 vcpu
->arch
.cr2
= addr
;
335 kvm_queue_exception_e(vcpu
, PF_VECTOR
, error_code
);
338 void kvm_inject_nmi(struct kvm_vcpu
*vcpu
)
340 vcpu
->arch
.nmi_pending
= 1;
342 EXPORT_SYMBOL_GPL(kvm_inject_nmi
);
344 void kvm_queue_exception_e(struct kvm_vcpu
*vcpu
, unsigned nr
, u32 error_code
)
346 kvm_multiple_exception(vcpu
, nr
, true, error_code
, false);
348 EXPORT_SYMBOL_GPL(kvm_queue_exception_e
);
350 void kvm_requeue_exception_e(struct kvm_vcpu
*vcpu
, unsigned nr
, u32 error_code
)
352 kvm_multiple_exception(vcpu
, nr
, true, error_code
, true);
354 EXPORT_SYMBOL_GPL(kvm_requeue_exception_e
);
357 * Checks if cpl <= required_cpl; if true, return true. Otherwise queue
358 * a #GP and return false.
360 bool kvm_require_cpl(struct kvm_vcpu
*vcpu
, int required_cpl
)
362 if (kvm_x86_ops
->get_cpl(vcpu
) <= required_cpl
)
364 kvm_queue_exception_e(vcpu
, GP_VECTOR
, 0);
367 EXPORT_SYMBOL_GPL(kvm_require_cpl
);
370 * Load the pae pdptrs. Return true is they are all valid.
372 int load_pdptrs(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
374 gfn_t pdpt_gfn
= cr3
>> PAGE_SHIFT
;
375 unsigned offset
= ((cr3
& (PAGE_SIZE
-1)) >> 5) << 2;
378 u64 pdpte
[ARRAY_SIZE(vcpu
->arch
.pdptrs
)];
380 ret
= kvm_read_guest_page(vcpu
->kvm
, pdpt_gfn
, pdpte
,
381 offset
* sizeof(u64
), sizeof(pdpte
));
386 for (i
= 0; i
< ARRAY_SIZE(pdpte
); ++i
) {
387 if (is_present_gpte(pdpte
[i
]) &&
388 (pdpte
[i
] & vcpu
->arch
.mmu
.rsvd_bits_mask
[0][2])) {
395 memcpy(vcpu
->arch
.pdptrs
, pdpte
, sizeof(vcpu
->arch
.pdptrs
));
396 __set_bit(VCPU_EXREG_PDPTR
,
397 (unsigned long *)&vcpu
->arch
.regs_avail
);
398 __set_bit(VCPU_EXREG_PDPTR
,
399 (unsigned long *)&vcpu
->arch
.regs_dirty
);
404 EXPORT_SYMBOL_GPL(load_pdptrs
);
406 static bool pdptrs_changed(struct kvm_vcpu
*vcpu
)
408 u64 pdpte
[ARRAY_SIZE(vcpu
->arch
.pdptrs
)];
412 if (is_long_mode(vcpu
) || !is_pae(vcpu
))
415 if (!test_bit(VCPU_EXREG_PDPTR
,
416 (unsigned long *)&vcpu
->arch
.regs_avail
))
419 r
= kvm_read_guest(vcpu
->kvm
, vcpu
->arch
.cr3
& ~31u, pdpte
, sizeof(pdpte
));
422 changed
= memcmp(pdpte
, vcpu
->arch
.pdptrs
, sizeof(pdpte
)) != 0;
428 int kvm_set_cr0(struct kvm_vcpu
*vcpu
, unsigned long cr0
)
430 unsigned long old_cr0
= kvm_read_cr0(vcpu
);
431 unsigned long update_bits
= X86_CR0_PG
| X86_CR0_WP
|
432 X86_CR0_CD
| X86_CR0_NW
;
437 if (cr0
& 0xffffffff00000000UL
)
441 cr0
&= ~CR0_RESERVED_BITS
;
443 if ((cr0
& X86_CR0_NW
) && !(cr0
& X86_CR0_CD
))
446 if ((cr0
& X86_CR0_PG
) && !(cr0
& X86_CR0_PE
))
449 if (!is_paging(vcpu
) && (cr0
& X86_CR0_PG
)) {
451 if ((vcpu
->arch
.efer
& EFER_LME
)) {
456 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
461 if (is_pae(vcpu
) && !load_pdptrs(vcpu
, vcpu
->arch
.cr3
))
465 kvm_x86_ops
->set_cr0(vcpu
, cr0
);
467 if ((cr0
^ old_cr0
) & update_bits
)
468 kvm_mmu_reset_context(vcpu
);
471 EXPORT_SYMBOL_GPL(kvm_set_cr0
);
473 void kvm_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
)
475 (void)kvm_set_cr0(vcpu
, kvm_read_cr0_bits(vcpu
, ~0x0eul
) | (msw
& 0x0f));
477 EXPORT_SYMBOL_GPL(kvm_lmsw
);
479 int __kvm_set_xcr(struct kvm_vcpu
*vcpu
, u32 index
, u64 xcr
)
483 /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */
484 if (index
!= XCR_XFEATURE_ENABLED_MASK
)
487 if (kvm_x86_ops
->get_cpl(vcpu
) != 0)
489 if (!(xcr0
& XSTATE_FP
))
491 if ((xcr0
& XSTATE_YMM
) && !(xcr0
& XSTATE_SSE
))
493 if (xcr0
& ~host_xcr0
)
495 vcpu
->arch
.xcr0
= xcr0
;
496 vcpu
->guest_xcr0_loaded
= 0;
500 int kvm_set_xcr(struct kvm_vcpu
*vcpu
, u32 index
, u64 xcr
)
502 if (__kvm_set_xcr(vcpu
, index
, xcr
)) {
503 kvm_inject_gp(vcpu
, 0);
508 EXPORT_SYMBOL_GPL(kvm_set_xcr
);
510 static bool guest_cpuid_has_xsave(struct kvm_vcpu
*vcpu
)
512 struct kvm_cpuid_entry2
*best
;
514 best
= kvm_find_cpuid_entry(vcpu
, 1, 0);
515 return best
&& (best
->ecx
& bit(X86_FEATURE_XSAVE
));
518 static void update_cpuid(struct kvm_vcpu
*vcpu
)
520 struct kvm_cpuid_entry2
*best
;
522 best
= kvm_find_cpuid_entry(vcpu
, 1, 0);
526 /* Update OSXSAVE bit */
527 if (cpu_has_xsave
&& best
->function
== 0x1) {
528 best
->ecx
&= ~(bit(X86_FEATURE_OSXSAVE
));
529 if (kvm_read_cr4_bits(vcpu
, X86_CR4_OSXSAVE
))
530 best
->ecx
|= bit(X86_FEATURE_OSXSAVE
);
534 int __kvm_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
)
536 unsigned long old_cr4
= kvm_read_cr4(vcpu
);
537 unsigned long pdptr_bits
= X86_CR4_PGE
| X86_CR4_PSE
| X86_CR4_PAE
;
539 if (cr4
& CR4_RESERVED_BITS
)
542 if (!guest_cpuid_has_xsave(vcpu
) && (cr4
& X86_CR4_OSXSAVE
))
545 if (is_long_mode(vcpu
)) {
546 if (!(cr4
& X86_CR4_PAE
))
548 } else if (is_paging(vcpu
) && (cr4
& X86_CR4_PAE
)
549 && ((cr4
^ old_cr4
) & pdptr_bits
)
550 && !load_pdptrs(vcpu
, vcpu
->arch
.cr3
))
553 if (cr4
& X86_CR4_VMXE
)
556 kvm_x86_ops
->set_cr4(vcpu
, cr4
);
558 if ((cr4
^ old_cr4
) & pdptr_bits
)
559 kvm_mmu_reset_context(vcpu
);
561 if ((cr4
^ old_cr4
) & X86_CR4_OSXSAVE
)
567 void kvm_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
)
569 if (__kvm_set_cr4(vcpu
, cr4
))
570 kvm_inject_gp(vcpu
, 0);
572 EXPORT_SYMBOL_GPL(kvm_set_cr4
);
574 static int __kvm_set_cr3(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
576 if (cr3
== vcpu
->arch
.cr3
&& !pdptrs_changed(vcpu
)) {
577 kvm_mmu_sync_roots(vcpu
);
578 kvm_mmu_flush_tlb(vcpu
);
582 if (is_long_mode(vcpu
)) {
583 if (cr3
& CR3_L_MODE_RESERVED_BITS
)
587 if (cr3
& CR3_PAE_RESERVED_BITS
)
589 if (is_paging(vcpu
) && !load_pdptrs(vcpu
, cr3
))
593 * We don't check reserved bits in nonpae mode, because
594 * this isn't enforced, and VMware depends on this.
599 * Does the new cr3 value map to physical memory? (Note, we
600 * catch an invalid cr3 even in real-mode, because it would
601 * cause trouble later on when we turn on paging anyway.)
603 * A real CPU would silently accept an invalid cr3 and would
604 * attempt to use it - with largely undefined (and often hard
605 * to debug) behavior on the guest side.
607 if (unlikely(!gfn_to_memslot(vcpu
->kvm
, cr3
>> PAGE_SHIFT
)))
609 vcpu
->arch
.cr3
= cr3
;
610 vcpu
->arch
.mmu
.new_cr3(vcpu
);
614 void kvm_set_cr3(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
616 if (__kvm_set_cr3(vcpu
, cr3
))
617 kvm_inject_gp(vcpu
, 0);
619 EXPORT_SYMBOL_GPL(kvm_set_cr3
);
621 int __kvm_set_cr8(struct kvm_vcpu
*vcpu
, unsigned long cr8
)
623 if (cr8
& CR8_RESERVED_BITS
)
625 if (irqchip_in_kernel(vcpu
->kvm
))
626 kvm_lapic_set_tpr(vcpu
, cr8
);
628 vcpu
->arch
.cr8
= cr8
;
632 void kvm_set_cr8(struct kvm_vcpu
*vcpu
, unsigned long cr8
)
634 if (__kvm_set_cr8(vcpu
, cr8
))
635 kvm_inject_gp(vcpu
, 0);
637 EXPORT_SYMBOL_GPL(kvm_set_cr8
);
639 unsigned long kvm_get_cr8(struct kvm_vcpu
*vcpu
)
641 if (irqchip_in_kernel(vcpu
->kvm
))
642 return kvm_lapic_get_cr8(vcpu
);
644 return vcpu
->arch
.cr8
;
646 EXPORT_SYMBOL_GPL(kvm_get_cr8
);
648 static int __kvm_set_dr(struct kvm_vcpu
*vcpu
, int dr
, unsigned long val
)
652 vcpu
->arch
.db
[dr
] = val
;
653 if (!(vcpu
->guest_debug
& KVM_GUESTDBG_USE_HW_BP
))
654 vcpu
->arch
.eff_db
[dr
] = val
;
657 if (kvm_read_cr4_bits(vcpu
, X86_CR4_DE
))
661 if (val
& 0xffffffff00000000ULL
)
663 vcpu
->arch
.dr6
= (val
& DR6_VOLATILE
) | DR6_FIXED_1
;
666 if (kvm_read_cr4_bits(vcpu
, X86_CR4_DE
))
670 if (val
& 0xffffffff00000000ULL
)
672 vcpu
->arch
.dr7
= (val
& DR7_VOLATILE
) | DR7_FIXED_1
;
673 if (!(vcpu
->guest_debug
& KVM_GUESTDBG_USE_HW_BP
)) {
674 kvm_x86_ops
->set_dr7(vcpu
, vcpu
->arch
.dr7
);
675 vcpu
->arch
.switch_db_regs
= (val
& DR7_BP_EN_MASK
);
683 int kvm_set_dr(struct kvm_vcpu
*vcpu
, int dr
, unsigned long val
)
687 res
= __kvm_set_dr(vcpu
, dr
, val
);
689 kvm_queue_exception(vcpu
, UD_VECTOR
);
691 kvm_inject_gp(vcpu
, 0);
695 EXPORT_SYMBOL_GPL(kvm_set_dr
);
697 static int _kvm_get_dr(struct kvm_vcpu
*vcpu
, int dr
, unsigned long *val
)
701 *val
= vcpu
->arch
.db
[dr
];
704 if (kvm_read_cr4_bits(vcpu
, X86_CR4_DE
))
708 *val
= vcpu
->arch
.dr6
;
711 if (kvm_read_cr4_bits(vcpu
, X86_CR4_DE
))
715 *val
= vcpu
->arch
.dr7
;
722 int kvm_get_dr(struct kvm_vcpu
*vcpu
, int dr
, unsigned long *val
)
724 if (_kvm_get_dr(vcpu
, dr
, val
)) {
725 kvm_queue_exception(vcpu
, UD_VECTOR
);
730 EXPORT_SYMBOL_GPL(kvm_get_dr
);
733 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
734 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
736 * This list is modified at module load time to reflect the
737 * capabilities of the host cpu. This capabilities test skips MSRs that are
738 * kvm-specific. Those are put in the beginning of the list.
741 #define KVM_SAVE_MSRS_BEGIN 7
742 static u32 msrs_to_save
[] = {
743 MSR_KVM_SYSTEM_TIME
, MSR_KVM_WALL_CLOCK
,
744 MSR_KVM_SYSTEM_TIME_NEW
, MSR_KVM_WALL_CLOCK_NEW
,
745 HV_X64_MSR_GUEST_OS_ID
, HV_X64_MSR_HYPERCALL
,
746 HV_X64_MSR_APIC_ASSIST_PAGE
,
747 MSR_IA32_SYSENTER_CS
, MSR_IA32_SYSENTER_ESP
, MSR_IA32_SYSENTER_EIP
,
750 MSR_CSTAR
, MSR_KERNEL_GS_BASE
, MSR_SYSCALL_MASK
, MSR_LSTAR
,
752 MSR_IA32_TSC
, MSR_IA32_PERF_STATUS
, MSR_IA32_CR_PAT
, MSR_VM_HSAVE_PA
755 static unsigned num_msrs_to_save
;
757 static u32 emulated_msrs
[] = {
758 MSR_IA32_MISC_ENABLE
,
761 static int set_efer(struct kvm_vcpu
*vcpu
, u64 efer
)
763 u64 old_efer
= vcpu
->arch
.efer
;
765 if (efer
& efer_reserved_bits
)
769 && (vcpu
->arch
.efer
& EFER_LME
) != (efer
& EFER_LME
))
772 if (efer
& EFER_FFXSR
) {
773 struct kvm_cpuid_entry2
*feat
;
775 feat
= kvm_find_cpuid_entry(vcpu
, 0x80000001, 0);
776 if (!feat
|| !(feat
->edx
& bit(X86_FEATURE_FXSR_OPT
)))
780 if (efer
& EFER_SVME
) {
781 struct kvm_cpuid_entry2
*feat
;
783 feat
= kvm_find_cpuid_entry(vcpu
, 0x80000001, 0);
784 if (!feat
|| !(feat
->ecx
& bit(X86_FEATURE_SVM
)))
789 efer
|= vcpu
->arch
.efer
& EFER_LMA
;
791 kvm_x86_ops
->set_efer(vcpu
, efer
);
793 vcpu
->arch
.mmu
.base_role
.nxe
= (efer
& EFER_NX
) && !tdp_enabled
;
794 kvm_mmu_reset_context(vcpu
);
796 /* Update reserved bits */
797 if ((efer
^ old_efer
) & EFER_NX
)
798 kvm_mmu_reset_context(vcpu
);
803 void kvm_enable_efer_bits(u64 mask
)
805 efer_reserved_bits
&= ~mask
;
807 EXPORT_SYMBOL_GPL(kvm_enable_efer_bits
);
811 * Writes msr value into into the appropriate "register".
812 * Returns 0 on success, non-0 otherwise.
813 * Assumes vcpu_load() was already called.
815 int kvm_set_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64 data
)
817 return kvm_x86_ops
->set_msr(vcpu
, msr_index
, data
);
821 * Adapt set_msr() to msr_io()'s calling convention
823 static int do_set_msr(struct kvm_vcpu
*vcpu
, unsigned index
, u64
*data
)
825 return kvm_set_msr(vcpu
, index
, *data
);
828 static void kvm_write_wall_clock(struct kvm
*kvm
, gpa_t wall_clock
)
832 struct pvclock_wall_clock wc
;
833 struct timespec boot
;
838 r
= kvm_read_guest(kvm
, wall_clock
, &version
, sizeof(version
));
843 ++version
; /* first time write, random junk */
847 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
850 * The guest calculates current wall clock time by adding
851 * system time (updated by kvm_write_guest_time below) to the
852 * wall clock specified here. guest system time equals host
853 * system time for us, thus we must fill in host boot time here.
857 wc
.sec
= boot
.tv_sec
;
858 wc
.nsec
= boot
.tv_nsec
;
859 wc
.version
= version
;
861 kvm_write_guest(kvm
, wall_clock
, &wc
, sizeof(wc
));
864 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
867 static uint32_t div_frac(uint32_t dividend
, uint32_t divisor
)
869 uint32_t quotient
, remainder
;
871 /* Don't try to replace with do_div(), this one calculates
872 * "(dividend << 32) / divisor" */
874 : "=a" (quotient
), "=d" (remainder
)
875 : "0" (0), "1" (dividend
), "r" (divisor
) );
879 static void kvm_set_time_scale(uint32_t tsc_khz
, struct pvclock_vcpu_time_info
*hv_clock
)
881 uint64_t nsecs
= 1000000000LL;
886 tps64
= tsc_khz
* 1000LL;
887 while (tps64
> nsecs
*2) {
892 tps32
= (uint32_t)tps64
;
893 while (tps32
<= (uint32_t)nsecs
) {
898 hv_clock
->tsc_shift
= shift
;
899 hv_clock
->tsc_to_system_mul
= div_frac(nsecs
, tps32
);
901 pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n",
902 __func__
, tsc_khz
, hv_clock
->tsc_shift
,
903 hv_clock
->tsc_to_system_mul
);
906 static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz
);
908 static void kvm_write_guest_time(struct kvm_vcpu
*v
)
912 struct kvm_vcpu_arch
*vcpu
= &v
->arch
;
914 unsigned long this_tsc_khz
;
916 if ((!vcpu
->time_page
))
919 this_tsc_khz
= get_cpu_var(cpu_tsc_khz
);
920 if (unlikely(vcpu
->hv_clock_tsc_khz
!= this_tsc_khz
)) {
921 kvm_set_time_scale(this_tsc_khz
, &vcpu
->hv_clock
);
922 vcpu
->hv_clock_tsc_khz
= this_tsc_khz
;
924 put_cpu_var(cpu_tsc_khz
);
926 /* Keep irq disabled to prevent changes to the clock */
927 local_irq_save(flags
);
928 kvm_get_msr(v
, MSR_IA32_TSC
, &vcpu
->hv_clock
.tsc_timestamp
);
930 monotonic_to_bootbased(&ts
);
931 local_irq_restore(flags
);
933 /* With all the info we got, fill in the values */
935 vcpu
->hv_clock
.system_time
= ts
.tv_nsec
+
936 (NSEC_PER_SEC
* (u64
)ts
.tv_sec
) + v
->kvm
->arch
.kvmclock_offset
;
938 vcpu
->hv_clock
.flags
= 0;
941 * The interface expects us to write an even number signaling that the
942 * update is finished. Since the guest won't see the intermediate
943 * state, we just increase by 2 at the end.
945 vcpu
->hv_clock
.version
+= 2;
947 shared_kaddr
= kmap_atomic(vcpu
->time_page
, KM_USER0
);
949 memcpy(shared_kaddr
+ vcpu
->time_offset
, &vcpu
->hv_clock
,
950 sizeof(vcpu
->hv_clock
));
952 kunmap_atomic(shared_kaddr
, KM_USER0
);
954 mark_page_dirty(v
->kvm
, vcpu
->time
>> PAGE_SHIFT
);
957 static int kvm_request_guest_time_update(struct kvm_vcpu
*v
)
959 struct kvm_vcpu_arch
*vcpu
= &v
->arch
;
961 if (!vcpu
->time_page
)
963 set_bit(KVM_REQ_KVMCLOCK_UPDATE
, &v
->requests
);
967 static bool msr_mtrr_valid(unsigned msr
)
970 case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR
- 1:
971 case MSR_MTRRfix64K_00000
:
972 case MSR_MTRRfix16K_80000
:
973 case MSR_MTRRfix16K_A0000
:
974 case MSR_MTRRfix4K_C0000
:
975 case MSR_MTRRfix4K_C8000
:
976 case MSR_MTRRfix4K_D0000
:
977 case MSR_MTRRfix4K_D8000
:
978 case MSR_MTRRfix4K_E0000
:
979 case MSR_MTRRfix4K_E8000
:
980 case MSR_MTRRfix4K_F0000
:
981 case MSR_MTRRfix4K_F8000
:
982 case MSR_MTRRdefType
:
983 case MSR_IA32_CR_PAT
:
991 static bool valid_pat_type(unsigned t
)
993 return t
< 8 && (1 << t
) & 0xf3; /* 0, 1, 4, 5, 6, 7 */
996 static bool valid_mtrr_type(unsigned t
)
998 return t
< 8 && (1 << t
) & 0x73; /* 0, 1, 4, 5, 6 */
1001 static bool mtrr_valid(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
1005 if (!msr_mtrr_valid(msr
))
1008 if (msr
== MSR_IA32_CR_PAT
) {
1009 for (i
= 0; i
< 8; i
++)
1010 if (!valid_pat_type((data
>> (i
* 8)) & 0xff))
1013 } else if (msr
== MSR_MTRRdefType
) {
1016 return valid_mtrr_type(data
& 0xff);
1017 } else if (msr
>= MSR_MTRRfix64K_00000
&& msr
<= MSR_MTRRfix4K_F8000
) {
1018 for (i
= 0; i
< 8 ; i
++)
1019 if (!valid_mtrr_type((data
>> (i
* 8)) & 0xff))
1024 /* variable MTRRs */
1025 return valid_mtrr_type(data
& 0xff);
1028 static int set_msr_mtrr(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
1030 u64
*p
= (u64
*)&vcpu
->arch
.mtrr_state
.fixed_ranges
;
1032 if (!mtrr_valid(vcpu
, msr
, data
))
1035 if (msr
== MSR_MTRRdefType
) {
1036 vcpu
->arch
.mtrr_state
.def_type
= data
;
1037 vcpu
->arch
.mtrr_state
.enabled
= (data
& 0xc00) >> 10;
1038 } else if (msr
== MSR_MTRRfix64K_00000
)
1040 else if (msr
== MSR_MTRRfix16K_80000
|| msr
== MSR_MTRRfix16K_A0000
)
1041 p
[1 + msr
- MSR_MTRRfix16K_80000
] = data
;
1042 else if (msr
>= MSR_MTRRfix4K_C0000
&& msr
<= MSR_MTRRfix4K_F8000
)
1043 p
[3 + msr
- MSR_MTRRfix4K_C0000
] = data
;
1044 else if (msr
== MSR_IA32_CR_PAT
)
1045 vcpu
->arch
.pat
= data
;
1046 else { /* Variable MTRRs */
1047 int idx
, is_mtrr_mask
;
1050 idx
= (msr
- 0x200) / 2;
1051 is_mtrr_mask
= msr
- 0x200 - 2 * idx
;
1054 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].base_lo
;
1057 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].mask_lo
;
1061 kvm_mmu_reset_context(vcpu
);
1065 static int set_msr_mce(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
1067 u64 mcg_cap
= vcpu
->arch
.mcg_cap
;
1068 unsigned bank_num
= mcg_cap
& 0xff;
1071 case MSR_IA32_MCG_STATUS
:
1072 vcpu
->arch
.mcg_status
= data
;
1074 case MSR_IA32_MCG_CTL
:
1075 if (!(mcg_cap
& MCG_CTL_P
))
1077 if (data
!= 0 && data
!= ~(u64
)0)
1079 vcpu
->arch
.mcg_ctl
= data
;
1082 if (msr
>= MSR_IA32_MC0_CTL
&&
1083 msr
< MSR_IA32_MC0_CTL
+ 4 * bank_num
) {
1084 u32 offset
= msr
- MSR_IA32_MC0_CTL
;
1085 /* only 0 or all 1s can be written to IA32_MCi_CTL
1086 * some Linux kernels though clear bit 10 in bank 4 to
1087 * workaround a BIOS/GART TBL issue on AMD K8s, ignore
1088 * this to avoid an uncatched #GP in the guest
1090 if ((offset
& 0x3) == 0 &&
1091 data
!= 0 && (data
| (1 << 10)) != ~(u64
)0)
1093 vcpu
->arch
.mce_banks
[offset
] = data
;
1101 static int xen_hvm_config(struct kvm_vcpu
*vcpu
, u64 data
)
1103 struct kvm
*kvm
= vcpu
->kvm
;
1104 int lm
= is_long_mode(vcpu
);
1105 u8
*blob_addr
= lm
? (u8
*)(long)kvm
->arch
.xen_hvm_config
.blob_addr_64
1106 : (u8
*)(long)kvm
->arch
.xen_hvm_config
.blob_addr_32
;
1107 u8 blob_size
= lm
? kvm
->arch
.xen_hvm_config
.blob_size_64
1108 : kvm
->arch
.xen_hvm_config
.blob_size_32
;
1109 u32 page_num
= data
& ~PAGE_MASK
;
1110 u64 page_addr
= data
& PAGE_MASK
;
1115 if (page_num
>= blob_size
)
1118 page
= kzalloc(PAGE_SIZE
, GFP_KERNEL
);
1122 if (copy_from_user(page
, blob_addr
+ (page_num
* PAGE_SIZE
), PAGE_SIZE
))
1124 if (kvm_write_guest(kvm
, page_addr
, page
, PAGE_SIZE
))
1133 static bool kvm_hv_hypercall_enabled(struct kvm
*kvm
)
1135 return kvm
->arch
.hv_hypercall
& HV_X64_MSR_HYPERCALL_ENABLE
;
1138 static bool kvm_hv_msr_partition_wide(u32 msr
)
1142 case HV_X64_MSR_GUEST_OS_ID
:
1143 case HV_X64_MSR_HYPERCALL
:
1151 static int set_msr_hyperv_pw(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
1153 struct kvm
*kvm
= vcpu
->kvm
;
1156 case HV_X64_MSR_GUEST_OS_ID
:
1157 kvm
->arch
.hv_guest_os_id
= data
;
1158 /* setting guest os id to zero disables hypercall page */
1159 if (!kvm
->arch
.hv_guest_os_id
)
1160 kvm
->arch
.hv_hypercall
&= ~HV_X64_MSR_HYPERCALL_ENABLE
;
1162 case HV_X64_MSR_HYPERCALL
: {
1167 /* if guest os id is not set hypercall should remain disabled */
1168 if (!kvm
->arch
.hv_guest_os_id
)
1170 if (!(data
& HV_X64_MSR_HYPERCALL_ENABLE
)) {
1171 kvm
->arch
.hv_hypercall
= data
;
1174 gfn
= data
>> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT
;
1175 addr
= gfn_to_hva(kvm
, gfn
);
1176 if (kvm_is_error_hva(addr
))
1178 kvm_x86_ops
->patch_hypercall(vcpu
, instructions
);
1179 ((unsigned char *)instructions
)[3] = 0xc3; /* ret */
1180 if (copy_to_user((void __user
*)addr
, instructions
, 4))
1182 kvm
->arch
.hv_hypercall
= data
;
1186 pr_unimpl(vcpu
, "HYPER-V unimplemented wrmsr: 0x%x "
1187 "data 0x%llx\n", msr
, data
);
1193 static int set_msr_hyperv(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
1196 case HV_X64_MSR_APIC_ASSIST_PAGE
: {
1199 if (!(data
& HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE
)) {
1200 vcpu
->arch
.hv_vapic
= data
;
1203 addr
= gfn_to_hva(vcpu
->kvm
, data
>>
1204 HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT
);
1205 if (kvm_is_error_hva(addr
))
1207 if (clear_user((void __user
*)addr
, PAGE_SIZE
))
1209 vcpu
->arch
.hv_vapic
= data
;
1212 case HV_X64_MSR_EOI
:
1213 return kvm_hv_vapic_msr_write(vcpu
, APIC_EOI
, data
);
1214 case HV_X64_MSR_ICR
:
1215 return kvm_hv_vapic_msr_write(vcpu
, APIC_ICR
, data
);
1216 case HV_X64_MSR_TPR
:
1217 return kvm_hv_vapic_msr_write(vcpu
, APIC_TASKPRI
, data
);
1219 pr_unimpl(vcpu
, "HYPER-V unimplemented wrmsr: 0x%x "
1220 "data 0x%llx\n", msr
, data
);
1227 int kvm_set_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
1231 return set_efer(vcpu
, data
);
1233 data
&= ~(u64
)0x40; /* ignore flush filter disable */
1234 data
&= ~(u64
)0x100; /* ignore ignne emulation enable */
1236 pr_unimpl(vcpu
, "unimplemented HWCR wrmsr: 0x%llx\n",
1241 case MSR_FAM10H_MMIO_CONF_BASE
:
1243 pr_unimpl(vcpu
, "unimplemented MMIO_CONF_BASE wrmsr: "
1248 case MSR_AMD64_NB_CFG
:
1250 case MSR_IA32_DEBUGCTLMSR
:
1252 /* We support the non-activated case already */
1254 } else if (data
& ~(DEBUGCTLMSR_LBR
| DEBUGCTLMSR_BTF
)) {
1255 /* Values other than LBR and BTF are vendor-specific,
1256 thus reserved and should throw a #GP */
1259 pr_unimpl(vcpu
, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
1262 case MSR_IA32_UCODE_REV
:
1263 case MSR_IA32_UCODE_WRITE
:
1264 case MSR_VM_HSAVE_PA
:
1265 case MSR_AMD64_PATCH_LOADER
:
1267 case 0x200 ... 0x2ff:
1268 return set_msr_mtrr(vcpu
, msr
, data
);
1269 case MSR_IA32_APICBASE
:
1270 kvm_set_apic_base(vcpu
, data
);
1272 case APIC_BASE_MSR
... APIC_BASE_MSR
+ 0x3ff:
1273 return kvm_x2apic_msr_write(vcpu
, msr
, data
);
1274 case MSR_IA32_MISC_ENABLE
:
1275 vcpu
->arch
.ia32_misc_enable_msr
= data
;
1277 case MSR_KVM_WALL_CLOCK_NEW
:
1278 case MSR_KVM_WALL_CLOCK
:
1279 vcpu
->kvm
->arch
.wall_clock
= data
;
1280 kvm_write_wall_clock(vcpu
->kvm
, data
);
1282 case MSR_KVM_SYSTEM_TIME_NEW
:
1283 case MSR_KVM_SYSTEM_TIME
: {
1284 if (vcpu
->arch
.time_page
) {
1285 kvm_release_page_dirty(vcpu
->arch
.time_page
);
1286 vcpu
->arch
.time_page
= NULL
;
1289 vcpu
->arch
.time
= data
;
1291 /* we verify if the enable bit is set... */
1295 /* ...but clean it before doing the actual write */
1296 vcpu
->arch
.time_offset
= data
& ~(PAGE_MASK
| 1);
1298 vcpu
->arch
.time_page
=
1299 gfn_to_page(vcpu
->kvm
, data
>> PAGE_SHIFT
);
1301 if (is_error_page(vcpu
->arch
.time_page
)) {
1302 kvm_release_page_clean(vcpu
->arch
.time_page
);
1303 vcpu
->arch
.time_page
= NULL
;
1306 kvm_request_guest_time_update(vcpu
);
1309 case MSR_IA32_MCG_CTL
:
1310 case MSR_IA32_MCG_STATUS
:
1311 case MSR_IA32_MC0_CTL
... MSR_IA32_MC0_CTL
+ 4 * KVM_MAX_MCE_BANKS
- 1:
1312 return set_msr_mce(vcpu
, msr
, data
);
1314 /* Performance counters are not protected by a CPUID bit,
1315 * so we should check all of them in the generic path for the sake of
1316 * cross vendor migration.
1317 * Writing a zero into the event select MSRs disables them,
1318 * which we perfectly emulate ;-). Any other value should be at least
1319 * reported, some guests depend on them.
1321 case MSR_P6_EVNTSEL0
:
1322 case MSR_P6_EVNTSEL1
:
1323 case MSR_K7_EVNTSEL0
:
1324 case MSR_K7_EVNTSEL1
:
1325 case MSR_K7_EVNTSEL2
:
1326 case MSR_K7_EVNTSEL3
:
1328 pr_unimpl(vcpu
, "unimplemented perfctr wrmsr: "
1329 "0x%x data 0x%llx\n", msr
, data
);
1331 /* at least RHEL 4 unconditionally writes to the perfctr registers,
1332 * so we ignore writes to make it happy.
1334 case MSR_P6_PERFCTR0
:
1335 case MSR_P6_PERFCTR1
:
1336 case MSR_K7_PERFCTR0
:
1337 case MSR_K7_PERFCTR1
:
1338 case MSR_K7_PERFCTR2
:
1339 case MSR_K7_PERFCTR3
:
1340 pr_unimpl(vcpu
, "unimplemented perfctr wrmsr: "
1341 "0x%x data 0x%llx\n", msr
, data
);
1343 case HV_X64_MSR_GUEST_OS_ID
... HV_X64_MSR_SINT15
:
1344 if (kvm_hv_msr_partition_wide(msr
)) {
1346 mutex_lock(&vcpu
->kvm
->lock
);
1347 r
= set_msr_hyperv_pw(vcpu
, msr
, data
);
1348 mutex_unlock(&vcpu
->kvm
->lock
);
1351 return set_msr_hyperv(vcpu
, msr
, data
);
1354 if (msr
&& (msr
== vcpu
->kvm
->arch
.xen_hvm_config
.msr
))
1355 return xen_hvm_config(vcpu
, data
);
1357 pr_unimpl(vcpu
, "unhandled wrmsr: 0x%x data %llx\n",
1361 pr_unimpl(vcpu
, "ignored wrmsr: 0x%x data %llx\n",
1368 EXPORT_SYMBOL_GPL(kvm_set_msr_common
);
1372 * Reads an msr value (of 'msr_index') into 'pdata'.
1373 * Returns 0 on success, non-0 otherwise.
1374 * Assumes vcpu_load() was already called.
1376 int kvm_get_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64
*pdata
)
1378 return kvm_x86_ops
->get_msr(vcpu
, msr_index
, pdata
);
1381 static int get_msr_mtrr(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
1383 u64
*p
= (u64
*)&vcpu
->arch
.mtrr_state
.fixed_ranges
;
1385 if (!msr_mtrr_valid(msr
))
1388 if (msr
== MSR_MTRRdefType
)
1389 *pdata
= vcpu
->arch
.mtrr_state
.def_type
+
1390 (vcpu
->arch
.mtrr_state
.enabled
<< 10);
1391 else if (msr
== MSR_MTRRfix64K_00000
)
1393 else if (msr
== MSR_MTRRfix16K_80000
|| msr
== MSR_MTRRfix16K_A0000
)
1394 *pdata
= p
[1 + msr
- MSR_MTRRfix16K_80000
];
1395 else if (msr
>= MSR_MTRRfix4K_C0000
&& msr
<= MSR_MTRRfix4K_F8000
)
1396 *pdata
= p
[3 + msr
- MSR_MTRRfix4K_C0000
];
1397 else if (msr
== MSR_IA32_CR_PAT
)
1398 *pdata
= vcpu
->arch
.pat
;
1399 else { /* Variable MTRRs */
1400 int idx
, is_mtrr_mask
;
1403 idx
= (msr
- 0x200) / 2;
1404 is_mtrr_mask
= msr
- 0x200 - 2 * idx
;
1407 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].base_lo
;
1410 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].mask_lo
;
1417 static int get_msr_mce(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
1420 u64 mcg_cap
= vcpu
->arch
.mcg_cap
;
1421 unsigned bank_num
= mcg_cap
& 0xff;
1424 case MSR_IA32_P5_MC_ADDR
:
1425 case MSR_IA32_P5_MC_TYPE
:
1428 case MSR_IA32_MCG_CAP
:
1429 data
= vcpu
->arch
.mcg_cap
;
1431 case MSR_IA32_MCG_CTL
:
1432 if (!(mcg_cap
& MCG_CTL_P
))
1434 data
= vcpu
->arch
.mcg_ctl
;
1436 case MSR_IA32_MCG_STATUS
:
1437 data
= vcpu
->arch
.mcg_status
;
1440 if (msr
>= MSR_IA32_MC0_CTL
&&
1441 msr
< MSR_IA32_MC0_CTL
+ 4 * bank_num
) {
1442 u32 offset
= msr
- MSR_IA32_MC0_CTL
;
1443 data
= vcpu
->arch
.mce_banks
[offset
];
1452 static int get_msr_hyperv_pw(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
1455 struct kvm
*kvm
= vcpu
->kvm
;
1458 case HV_X64_MSR_GUEST_OS_ID
:
1459 data
= kvm
->arch
.hv_guest_os_id
;
1461 case HV_X64_MSR_HYPERCALL
:
1462 data
= kvm
->arch
.hv_hypercall
;
1465 pr_unimpl(vcpu
, "Hyper-V unhandled rdmsr: 0x%x\n", msr
);
1473 static int get_msr_hyperv(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
1478 case HV_X64_MSR_VP_INDEX
: {
1481 kvm_for_each_vcpu(r
, v
, vcpu
->kvm
)
1486 case HV_X64_MSR_EOI
:
1487 return kvm_hv_vapic_msr_read(vcpu
, APIC_EOI
, pdata
);
1488 case HV_X64_MSR_ICR
:
1489 return kvm_hv_vapic_msr_read(vcpu
, APIC_ICR
, pdata
);
1490 case HV_X64_MSR_TPR
:
1491 return kvm_hv_vapic_msr_read(vcpu
, APIC_TASKPRI
, pdata
);
1493 pr_unimpl(vcpu
, "Hyper-V unhandled rdmsr: 0x%x\n", msr
);
1500 int kvm_get_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
1505 case MSR_IA32_PLATFORM_ID
:
1506 case MSR_IA32_UCODE_REV
:
1507 case MSR_IA32_EBL_CR_POWERON
:
1508 case MSR_IA32_DEBUGCTLMSR
:
1509 case MSR_IA32_LASTBRANCHFROMIP
:
1510 case MSR_IA32_LASTBRANCHTOIP
:
1511 case MSR_IA32_LASTINTFROMIP
:
1512 case MSR_IA32_LASTINTTOIP
:
1515 case MSR_VM_HSAVE_PA
:
1516 case MSR_P6_PERFCTR0
:
1517 case MSR_P6_PERFCTR1
:
1518 case MSR_P6_EVNTSEL0
:
1519 case MSR_P6_EVNTSEL1
:
1520 case MSR_K7_EVNTSEL0
:
1521 case MSR_K7_PERFCTR0
:
1522 case MSR_K8_INT_PENDING_MSG
:
1523 case MSR_AMD64_NB_CFG
:
1524 case MSR_FAM10H_MMIO_CONF_BASE
:
1528 data
= 0x500 | KVM_NR_VAR_MTRR
;
1530 case 0x200 ... 0x2ff:
1531 return get_msr_mtrr(vcpu
, msr
, pdata
);
1532 case 0xcd: /* fsb frequency */
1535 case MSR_IA32_APICBASE
:
1536 data
= kvm_get_apic_base(vcpu
);
1538 case APIC_BASE_MSR
... APIC_BASE_MSR
+ 0x3ff:
1539 return kvm_x2apic_msr_read(vcpu
, msr
, pdata
);
1541 case MSR_IA32_MISC_ENABLE
:
1542 data
= vcpu
->arch
.ia32_misc_enable_msr
;
1544 case MSR_IA32_PERF_STATUS
:
1545 /* TSC increment by tick */
1547 /* CPU multiplier */
1548 data
|= (((uint64_t)4ULL) << 40);
1551 data
= vcpu
->arch
.efer
;
1553 case MSR_KVM_WALL_CLOCK
:
1554 case MSR_KVM_WALL_CLOCK_NEW
:
1555 data
= vcpu
->kvm
->arch
.wall_clock
;
1557 case MSR_KVM_SYSTEM_TIME
:
1558 case MSR_KVM_SYSTEM_TIME_NEW
:
1559 data
= vcpu
->arch
.time
;
1561 case MSR_IA32_P5_MC_ADDR
:
1562 case MSR_IA32_P5_MC_TYPE
:
1563 case MSR_IA32_MCG_CAP
:
1564 case MSR_IA32_MCG_CTL
:
1565 case MSR_IA32_MCG_STATUS
:
1566 case MSR_IA32_MC0_CTL
... MSR_IA32_MC0_CTL
+ 4 * KVM_MAX_MCE_BANKS
- 1:
1567 return get_msr_mce(vcpu
, msr
, pdata
);
1568 case HV_X64_MSR_GUEST_OS_ID
... HV_X64_MSR_SINT15
:
1569 if (kvm_hv_msr_partition_wide(msr
)) {
1571 mutex_lock(&vcpu
->kvm
->lock
);
1572 r
= get_msr_hyperv_pw(vcpu
, msr
, pdata
);
1573 mutex_unlock(&vcpu
->kvm
->lock
);
1576 return get_msr_hyperv(vcpu
, msr
, pdata
);
1580 pr_unimpl(vcpu
, "unhandled rdmsr: 0x%x\n", msr
);
1583 pr_unimpl(vcpu
, "ignored rdmsr: 0x%x\n", msr
);
1591 EXPORT_SYMBOL_GPL(kvm_get_msr_common
);
1594 * Read or write a bunch of msrs. All parameters are kernel addresses.
1596 * @return number of msrs set successfully.
1598 static int __msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs
*msrs
,
1599 struct kvm_msr_entry
*entries
,
1600 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
1601 unsigned index
, u64
*data
))
1605 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
1606 for (i
= 0; i
< msrs
->nmsrs
; ++i
)
1607 if (do_msr(vcpu
, entries
[i
].index
, &entries
[i
].data
))
1609 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
1615 * Read or write a bunch of msrs. Parameters are user addresses.
1617 * @return number of msrs set successfully.
1619 static int msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs __user
*user_msrs
,
1620 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
1621 unsigned index
, u64
*data
),
1624 struct kvm_msrs msrs
;
1625 struct kvm_msr_entry
*entries
;
1630 if (copy_from_user(&msrs
, user_msrs
, sizeof msrs
))
1634 if (msrs
.nmsrs
>= MAX_IO_MSRS
)
1638 size
= sizeof(struct kvm_msr_entry
) * msrs
.nmsrs
;
1639 entries
= kmalloc(size
, GFP_KERNEL
);
1644 if (copy_from_user(entries
, user_msrs
->entries
, size
))
1647 r
= n
= __msr_io(vcpu
, &msrs
, entries
, do_msr
);
1652 if (writeback
&& copy_to_user(user_msrs
->entries
, entries
, size
))
1663 int kvm_dev_ioctl_check_extension(long ext
)
1668 case KVM_CAP_IRQCHIP
:
1670 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL
:
1671 case KVM_CAP_SET_TSS_ADDR
:
1672 case KVM_CAP_EXT_CPUID
:
1673 case KVM_CAP_CLOCKSOURCE
:
1675 case KVM_CAP_NOP_IO_DELAY
:
1676 case KVM_CAP_MP_STATE
:
1677 case KVM_CAP_SYNC_MMU
:
1678 case KVM_CAP_REINJECT_CONTROL
:
1679 case KVM_CAP_IRQ_INJECT_STATUS
:
1680 case KVM_CAP_ASSIGN_DEV_IRQ
:
1682 case KVM_CAP_IOEVENTFD
:
1684 case KVM_CAP_PIT_STATE2
:
1685 case KVM_CAP_SET_IDENTITY_MAP_ADDR
:
1686 case KVM_CAP_XEN_HVM
:
1687 case KVM_CAP_ADJUST_CLOCK
:
1688 case KVM_CAP_VCPU_EVENTS
:
1689 case KVM_CAP_HYPERV
:
1690 case KVM_CAP_HYPERV_VAPIC
:
1691 case KVM_CAP_HYPERV_SPIN
:
1692 case KVM_CAP_PCI_SEGMENT
:
1693 case KVM_CAP_DEBUGREGS
:
1694 case KVM_CAP_X86_ROBUST_SINGLESTEP
:
1697 case KVM_CAP_COALESCED_MMIO
:
1698 r
= KVM_COALESCED_MMIO_PAGE_OFFSET
;
1701 r
= !kvm_x86_ops
->cpu_has_accelerated_tpr();
1703 case KVM_CAP_NR_VCPUS
:
1706 case KVM_CAP_NR_MEMSLOTS
:
1707 r
= KVM_MEMORY_SLOTS
;
1709 case KVM_CAP_PV_MMU
: /* obsolete */
1716 r
= KVM_MAX_MCE_BANKS
;
1726 long kvm_arch_dev_ioctl(struct file
*filp
,
1727 unsigned int ioctl
, unsigned long arg
)
1729 void __user
*argp
= (void __user
*)arg
;
1733 case KVM_GET_MSR_INDEX_LIST
: {
1734 struct kvm_msr_list __user
*user_msr_list
= argp
;
1735 struct kvm_msr_list msr_list
;
1739 if (copy_from_user(&msr_list
, user_msr_list
, sizeof msr_list
))
1742 msr_list
.nmsrs
= num_msrs_to_save
+ ARRAY_SIZE(emulated_msrs
);
1743 if (copy_to_user(user_msr_list
, &msr_list
, sizeof msr_list
))
1746 if (n
< msr_list
.nmsrs
)
1749 if (copy_to_user(user_msr_list
->indices
, &msrs_to_save
,
1750 num_msrs_to_save
* sizeof(u32
)))
1752 if (copy_to_user(user_msr_list
->indices
+ num_msrs_to_save
,
1754 ARRAY_SIZE(emulated_msrs
) * sizeof(u32
)))
1759 case KVM_GET_SUPPORTED_CPUID
: {
1760 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1761 struct kvm_cpuid2 cpuid
;
1764 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1766 r
= kvm_dev_ioctl_get_supported_cpuid(&cpuid
,
1767 cpuid_arg
->entries
);
1772 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
1777 case KVM_X86_GET_MCE_CAP_SUPPORTED
: {
1780 mce_cap
= KVM_MCE_CAP_SUPPORTED
;
1782 if (copy_to_user(argp
, &mce_cap
, sizeof mce_cap
))
1794 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
1796 kvm_x86_ops
->vcpu_load(vcpu
, cpu
);
1797 if (unlikely(per_cpu(cpu_tsc_khz
, cpu
) == 0)) {
1798 unsigned long khz
= cpufreq_quick_get(cpu
);
1801 per_cpu(cpu_tsc_khz
, cpu
) = khz
;
1803 kvm_request_guest_time_update(vcpu
);
1806 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
)
1808 kvm_x86_ops
->vcpu_put(vcpu
);
1809 kvm_put_guest_fpu(vcpu
);
1812 static int is_efer_nx(void)
1814 unsigned long long efer
= 0;
1816 rdmsrl_safe(MSR_EFER
, &efer
);
1817 return efer
& EFER_NX
;
1820 static void cpuid_fix_nx_cap(struct kvm_vcpu
*vcpu
)
1823 struct kvm_cpuid_entry2
*e
, *entry
;
1826 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
1827 e
= &vcpu
->arch
.cpuid_entries
[i
];
1828 if (e
->function
== 0x80000001) {
1833 if (entry
&& (entry
->edx
& (1 << 20)) && !is_efer_nx()) {
1834 entry
->edx
&= ~(1 << 20);
1835 printk(KERN_INFO
"kvm: guest NX capability removed\n");
1839 /* when an old userspace process fills a new kernel module */
1840 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu
*vcpu
,
1841 struct kvm_cpuid
*cpuid
,
1842 struct kvm_cpuid_entry __user
*entries
)
1845 struct kvm_cpuid_entry
*cpuid_entries
;
1848 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
1851 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry
) * cpuid
->nent
);
1855 if (copy_from_user(cpuid_entries
, entries
,
1856 cpuid
->nent
* sizeof(struct kvm_cpuid_entry
)))
1858 for (i
= 0; i
< cpuid
->nent
; i
++) {
1859 vcpu
->arch
.cpuid_entries
[i
].function
= cpuid_entries
[i
].function
;
1860 vcpu
->arch
.cpuid_entries
[i
].eax
= cpuid_entries
[i
].eax
;
1861 vcpu
->arch
.cpuid_entries
[i
].ebx
= cpuid_entries
[i
].ebx
;
1862 vcpu
->arch
.cpuid_entries
[i
].ecx
= cpuid_entries
[i
].ecx
;
1863 vcpu
->arch
.cpuid_entries
[i
].edx
= cpuid_entries
[i
].edx
;
1864 vcpu
->arch
.cpuid_entries
[i
].index
= 0;
1865 vcpu
->arch
.cpuid_entries
[i
].flags
= 0;
1866 vcpu
->arch
.cpuid_entries
[i
].padding
[0] = 0;
1867 vcpu
->arch
.cpuid_entries
[i
].padding
[1] = 0;
1868 vcpu
->arch
.cpuid_entries
[i
].padding
[2] = 0;
1870 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
1871 cpuid_fix_nx_cap(vcpu
);
1873 kvm_apic_set_version(vcpu
);
1874 kvm_x86_ops
->cpuid_update(vcpu
);
1878 vfree(cpuid_entries
);
1883 static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu
*vcpu
,
1884 struct kvm_cpuid2
*cpuid
,
1885 struct kvm_cpuid_entry2 __user
*entries
)
1890 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
1893 if (copy_from_user(&vcpu
->arch
.cpuid_entries
, entries
,
1894 cpuid
->nent
* sizeof(struct kvm_cpuid_entry2
)))
1896 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
1897 kvm_apic_set_version(vcpu
);
1898 kvm_x86_ops
->cpuid_update(vcpu
);
1906 static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu
*vcpu
,
1907 struct kvm_cpuid2
*cpuid
,
1908 struct kvm_cpuid_entry2 __user
*entries
)
1913 if (cpuid
->nent
< vcpu
->arch
.cpuid_nent
)
1916 if (copy_to_user(entries
, &vcpu
->arch
.cpuid_entries
,
1917 vcpu
->arch
.cpuid_nent
* sizeof(struct kvm_cpuid_entry2
)))
1922 cpuid
->nent
= vcpu
->arch
.cpuid_nent
;
1926 static void do_cpuid_1_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
1929 entry
->function
= function
;
1930 entry
->index
= index
;
1931 cpuid_count(entry
->function
, entry
->index
,
1932 &entry
->eax
, &entry
->ebx
, &entry
->ecx
, &entry
->edx
);
1936 #define F(x) bit(X86_FEATURE_##x)
1938 static void do_cpuid_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
1939 u32 index
, int *nent
, int maxnent
)
1941 unsigned f_nx
= is_efer_nx() ? F(NX
) : 0;
1942 #ifdef CONFIG_X86_64
1943 unsigned f_gbpages
= (kvm_x86_ops
->get_lpage_level() == PT_PDPE_LEVEL
)
1945 unsigned f_lm
= F(LM
);
1947 unsigned f_gbpages
= 0;
1950 unsigned f_rdtscp
= kvm_x86_ops
->rdtscp_supported() ? F(RDTSCP
) : 0;
1953 const u32 kvm_supported_word0_x86_features
=
1954 F(FPU
) | F(VME
) | F(DE
) | F(PSE
) |
1955 F(TSC
) | F(MSR
) | F(PAE
) | F(MCE
) |
1956 F(CX8
) | F(APIC
) | 0 /* Reserved */ | F(SEP
) |
1957 F(MTRR
) | F(PGE
) | F(MCA
) | F(CMOV
) |
1958 F(PAT
) | F(PSE36
) | 0 /* PSN */ | F(CLFLSH
) |
1959 0 /* Reserved, DS, ACPI */ | F(MMX
) |
1960 F(FXSR
) | F(XMM
) | F(XMM2
) | F(SELFSNOOP
) |
1961 0 /* HTT, TM, Reserved, PBE */;
1962 /* cpuid 0x80000001.edx */
1963 const u32 kvm_supported_word1_x86_features
=
1964 F(FPU
) | F(VME
) | F(DE
) | F(PSE
) |
1965 F(TSC
) | F(MSR
) | F(PAE
) | F(MCE
) |
1966 F(CX8
) | F(APIC
) | 0 /* Reserved */ | F(SYSCALL
) |
1967 F(MTRR
) | F(PGE
) | F(MCA
) | F(CMOV
) |
1968 F(PAT
) | F(PSE36
) | 0 /* Reserved */ |
1969 f_nx
| 0 /* Reserved */ | F(MMXEXT
) | F(MMX
) |
1970 F(FXSR
) | F(FXSR_OPT
) | f_gbpages
| f_rdtscp
|
1971 0 /* Reserved */ | f_lm
| F(3DNOWEXT
) | F(3DNOW
);
1973 const u32 kvm_supported_word4_x86_features
=
1974 F(XMM3
) | 0 /* Reserved, DTES64, MONITOR */ |
1975 0 /* DS-CPL, VMX, SMX, EST */ |
1976 0 /* TM2 */ | F(SSSE3
) | 0 /* CNXT-ID */ | 0 /* Reserved */ |
1977 0 /* Reserved */ | F(CX16
) | 0 /* xTPR Update, PDCM */ |
1978 0 /* Reserved, DCA */ | F(XMM4_1
) |
1979 F(XMM4_2
) | F(X2APIC
) | F(MOVBE
) | F(POPCNT
) |
1980 0 /* Reserved, AES */ | F(XSAVE
) | 0 /* OSXSAVE */;
1981 /* cpuid 0x80000001.ecx */
1982 const u32 kvm_supported_word6_x86_features
=
1983 F(LAHF_LM
) | F(CMP_LEGACY
) | F(SVM
) | 0 /* ExtApicSpace */ |
1984 F(CR8_LEGACY
) | F(ABM
) | F(SSE4A
) | F(MISALIGNSSE
) |
1985 F(3DNOWPREFETCH
) | 0 /* OSVW */ | 0 /* IBS */ | F(SSE5
) |
1986 0 /* SKINIT */ | 0 /* WDT */;
1988 /* all calls to cpuid_count() should be made on the same cpu */
1990 do_cpuid_1_ent(entry
, function
, index
);
1995 entry
->eax
= min(entry
->eax
, (u32
)0xd);
1998 entry
->edx
&= kvm_supported_word0_x86_features
;
1999 entry
->ecx
&= kvm_supported_word4_x86_features
;
2000 /* we support x2apic emulation even if host does not support
2001 * it since we emulate x2apic in software */
2002 entry
->ecx
|= F(X2APIC
);
2004 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
2005 * may return different values. This forces us to get_cpu() before
2006 * issuing the first command, and also to emulate this annoying behavior
2007 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
2009 int t
, times
= entry
->eax
& 0xff;
2011 entry
->flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
2012 entry
->flags
|= KVM_CPUID_FLAG_STATE_READ_NEXT
;
2013 for (t
= 1; t
< times
&& *nent
< maxnent
; ++t
) {
2014 do_cpuid_1_ent(&entry
[t
], function
, 0);
2015 entry
[t
].flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
2020 /* function 4 and 0xb have additional index. */
2024 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
2025 /* read more entries until cache_type is zero */
2026 for (i
= 1; *nent
< maxnent
; ++i
) {
2027 cache_type
= entry
[i
- 1].eax
& 0x1f;
2030 do_cpuid_1_ent(&entry
[i
], function
, i
);
2032 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
2040 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
2041 /* read more entries until level_type is zero */
2042 for (i
= 1; *nent
< maxnent
; ++i
) {
2043 level_type
= entry
[i
- 1].ecx
& 0xff00;
2046 do_cpuid_1_ent(&entry
[i
], function
, i
);
2048 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
2056 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
2057 for (i
= 1; *nent
< maxnent
; ++i
) {
2058 if (entry
[i
- 1].eax
== 0 && i
!= 2)
2060 do_cpuid_1_ent(&entry
[i
], function
, i
);
2062 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
2067 case KVM_CPUID_SIGNATURE
: {
2068 char signature
[12] = "KVMKVMKVM\0\0";
2069 u32
*sigptr
= (u32
*)signature
;
2071 entry
->ebx
= sigptr
[0];
2072 entry
->ecx
= sigptr
[1];
2073 entry
->edx
= sigptr
[2];
2076 case KVM_CPUID_FEATURES
:
2077 entry
->eax
= (1 << KVM_FEATURE_CLOCKSOURCE
) |
2078 (1 << KVM_FEATURE_NOP_IO_DELAY
) |
2079 (1 << KVM_FEATURE_CLOCKSOURCE2
) |
2080 (1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT
);
2086 entry
->eax
= min(entry
->eax
, 0x8000001a);
2089 entry
->edx
&= kvm_supported_word1_x86_features
;
2090 entry
->ecx
&= kvm_supported_word6_x86_features
;
2094 kvm_x86_ops
->set_supported_cpuid(function
, entry
);
2101 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2
*cpuid
,
2102 struct kvm_cpuid_entry2 __user
*entries
)
2104 struct kvm_cpuid_entry2
*cpuid_entries
;
2105 int limit
, nent
= 0, r
= -E2BIG
;
2108 if (cpuid
->nent
< 1)
2110 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
2111 cpuid
->nent
= KVM_MAX_CPUID_ENTRIES
;
2113 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry2
) * cpuid
->nent
);
2117 do_cpuid_ent(&cpuid_entries
[0], 0, 0, &nent
, cpuid
->nent
);
2118 limit
= cpuid_entries
[0].eax
;
2119 for (func
= 1; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
2120 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
2121 &nent
, cpuid
->nent
);
2123 if (nent
>= cpuid
->nent
)
2126 do_cpuid_ent(&cpuid_entries
[nent
], 0x80000000, 0, &nent
, cpuid
->nent
);
2127 limit
= cpuid_entries
[nent
- 1].eax
;
2128 for (func
= 0x80000001; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
2129 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
2130 &nent
, cpuid
->nent
);
2135 if (nent
>= cpuid
->nent
)
2138 do_cpuid_ent(&cpuid_entries
[nent
], KVM_CPUID_SIGNATURE
, 0, &nent
,
2142 if (nent
>= cpuid
->nent
)
2145 do_cpuid_ent(&cpuid_entries
[nent
], KVM_CPUID_FEATURES
, 0, &nent
,
2149 if (nent
>= cpuid
->nent
)
2153 if (copy_to_user(entries
, cpuid_entries
,
2154 nent
* sizeof(struct kvm_cpuid_entry2
)))
2160 vfree(cpuid_entries
);
2165 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu
*vcpu
,
2166 struct kvm_lapic_state
*s
)
2168 memcpy(s
->regs
, vcpu
->arch
.apic
->regs
, sizeof *s
);
2173 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu
*vcpu
,
2174 struct kvm_lapic_state
*s
)
2176 memcpy(vcpu
->arch
.apic
->regs
, s
->regs
, sizeof *s
);
2177 kvm_apic_post_state_restore(vcpu
);
2178 update_cr8_intercept(vcpu
);
2183 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu
*vcpu
,
2184 struct kvm_interrupt
*irq
)
2186 if (irq
->irq
< 0 || irq
->irq
>= 256)
2188 if (irqchip_in_kernel(vcpu
->kvm
))
2191 kvm_queue_interrupt(vcpu
, irq
->irq
, false);
2196 static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu
*vcpu
)
2198 kvm_inject_nmi(vcpu
);
2203 static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu
*vcpu
,
2204 struct kvm_tpr_access_ctl
*tac
)
2208 vcpu
->arch
.tpr_access_reporting
= !!tac
->enabled
;
2212 static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu
*vcpu
,
2216 unsigned bank_num
= mcg_cap
& 0xff, bank
;
2219 if (!bank_num
|| bank_num
>= KVM_MAX_MCE_BANKS
)
2221 if (mcg_cap
& ~(KVM_MCE_CAP_SUPPORTED
| 0xff | 0xff0000))
2224 vcpu
->arch
.mcg_cap
= mcg_cap
;
2225 /* Init IA32_MCG_CTL to all 1s */
2226 if (mcg_cap
& MCG_CTL_P
)
2227 vcpu
->arch
.mcg_ctl
= ~(u64
)0;
2228 /* Init IA32_MCi_CTL to all 1s */
2229 for (bank
= 0; bank
< bank_num
; bank
++)
2230 vcpu
->arch
.mce_banks
[bank
*4] = ~(u64
)0;
2235 static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu
*vcpu
,
2236 struct kvm_x86_mce
*mce
)
2238 u64 mcg_cap
= vcpu
->arch
.mcg_cap
;
2239 unsigned bank_num
= mcg_cap
& 0xff;
2240 u64
*banks
= vcpu
->arch
.mce_banks
;
2242 if (mce
->bank
>= bank_num
|| !(mce
->status
& MCI_STATUS_VAL
))
2245 * if IA32_MCG_CTL is not all 1s, the uncorrected error
2246 * reporting is disabled
2248 if ((mce
->status
& MCI_STATUS_UC
) && (mcg_cap
& MCG_CTL_P
) &&
2249 vcpu
->arch
.mcg_ctl
!= ~(u64
)0)
2251 banks
+= 4 * mce
->bank
;
2253 * if IA32_MCi_CTL is not all 1s, the uncorrected error
2254 * reporting is disabled for the bank
2256 if ((mce
->status
& MCI_STATUS_UC
) && banks
[0] != ~(u64
)0)
2258 if (mce
->status
& MCI_STATUS_UC
) {
2259 if ((vcpu
->arch
.mcg_status
& MCG_STATUS_MCIP
) ||
2260 !kvm_read_cr4_bits(vcpu
, X86_CR4_MCE
)) {
2261 printk(KERN_DEBUG
"kvm: set_mce: "
2262 "injects mce exception while "
2263 "previous one is in progress!\n");
2264 set_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
);
2267 if (banks
[1] & MCI_STATUS_VAL
)
2268 mce
->status
|= MCI_STATUS_OVER
;
2269 banks
[2] = mce
->addr
;
2270 banks
[3] = mce
->misc
;
2271 vcpu
->arch
.mcg_status
= mce
->mcg_status
;
2272 banks
[1] = mce
->status
;
2273 kvm_queue_exception(vcpu
, MC_VECTOR
);
2274 } else if (!(banks
[1] & MCI_STATUS_VAL
)
2275 || !(banks
[1] & MCI_STATUS_UC
)) {
2276 if (banks
[1] & MCI_STATUS_VAL
)
2277 mce
->status
|= MCI_STATUS_OVER
;
2278 banks
[2] = mce
->addr
;
2279 banks
[3] = mce
->misc
;
2280 banks
[1] = mce
->status
;
2282 banks
[1] |= MCI_STATUS_OVER
;
2286 static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu
*vcpu
,
2287 struct kvm_vcpu_events
*events
)
2289 events
->exception
.injected
=
2290 vcpu
->arch
.exception
.pending
&&
2291 !kvm_exception_is_soft(vcpu
->arch
.exception
.nr
);
2292 events
->exception
.nr
= vcpu
->arch
.exception
.nr
;
2293 events
->exception
.has_error_code
= vcpu
->arch
.exception
.has_error_code
;
2294 events
->exception
.error_code
= vcpu
->arch
.exception
.error_code
;
2296 events
->interrupt
.injected
=
2297 vcpu
->arch
.interrupt
.pending
&& !vcpu
->arch
.interrupt
.soft
;
2298 events
->interrupt
.nr
= vcpu
->arch
.interrupt
.nr
;
2299 events
->interrupt
.soft
= 0;
2300 events
->interrupt
.shadow
=
2301 kvm_x86_ops
->get_interrupt_shadow(vcpu
,
2302 KVM_X86_SHADOW_INT_MOV_SS
| KVM_X86_SHADOW_INT_STI
);
2304 events
->nmi
.injected
= vcpu
->arch
.nmi_injected
;
2305 events
->nmi
.pending
= vcpu
->arch
.nmi_pending
;
2306 events
->nmi
.masked
= kvm_x86_ops
->get_nmi_mask(vcpu
);
2308 events
->sipi_vector
= vcpu
->arch
.sipi_vector
;
2310 events
->flags
= (KVM_VCPUEVENT_VALID_NMI_PENDING
2311 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
2312 | KVM_VCPUEVENT_VALID_SHADOW
);
2315 static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu
*vcpu
,
2316 struct kvm_vcpu_events
*events
)
2318 if (events
->flags
& ~(KVM_VCPUEVENT_VALID_NMI_PENDING
2319 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
2320 | KVM_VCPUEVENT_VALID_SHADOW
))
2323 vcpu
->arch
.exception
.pending
= events
->exception
.injected
;
2324 vcpu
->arch
.exception
.nr
= events
->exception
.nr
;
2325 vcpu
->arch
.exception
.has_error_code
= events
->exception
.has_error_code
;
2326 vcpu
->arch
.exception
.error_code
= events
->exception
.error_code
;
2328 vcpu
->arch
.interrupt
.pending
= events
->interrupt
.injected
;
2329 vcpu
->arch
.interrupt
.nr
= events
->interrupt
.nr
;
2330 vcpu
->arch
.interrupt
.soft
= events
->interrupt
.soft
;
2331 if (vcpu
->arch
.interrupt
.pending
&& irqchip_in_kernel(vcpu
->kvm
))
2332 kvm_pic_clear_isr_ack(vcpu
->kvm
);
2333 if (events
->flags
& KVM_VCPUEVENT_VALID_SHADOW
)
2334 kvm_x86_ops
->set_interrupt_shadow(vcpu
,
2335 events
->interrupt
.shadow
);
2337 vcpu
->arch
.nmi_injected
= events
->nmi
.injected
;
2338 if (events
->flags
& KVM_VCPUEVENT_VALID_NMI_PENDING
)
2339 vcpu
->arch
.nmi_pending
= events
->nmi
.pending
;
2340 kvm_x86_ops
->set_nmi_mask(vcpu
, events
->nmi
.masked
);
2342 if (events
->flags
& KVM_VCPUEVENT_VALID_SIPI_VECTOR
)
2343 vcpu
->arch
.sipi_vector
= events
->sipi_vector
;
2348 static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu
*vcpu
,
2349 struct kvm_debugregs
*dbgregs
)
2351 memcpy(dbgregs
->db
, vcpu
->arch
.db
, sizeof(vcpu
->arch
.db
));
2352 dbgregs
->dr6
= vcpu
->arch
.dr6
;
2353 dbgregs
->dr7
= vcpu
->arch
.dr7
;
2357 static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu
*vcpu
,
2358 struct kvm_debugregs
*dbgregs
)
2363 memcpy(vcpu
->arch
.db
, dbgregs
->db
, sizeof(vcpu
->arch
.db
));
2364 vcpu
->arch
.dr6
= dbgregs
->dr6
;
2365 vcpu
->arch
.dr7
= dbgregs
->dr7
;
2370 long kvm_arch_vcpu_ioctl(struct file
*filp
,
2371 unsigned int ioctl
, unsigned long arg
)
2373 struct kvm_vcpu
*vcpu
= filp
->private_data
;
2374 void __user
*argp
= (void __user
*)arg
;
2376 struct kvm_lapic_state
*lapic
= NULL
;
2379 case KVM_GET_LAPIC
: {
2381 if (!vcpu
->arch
.apic
)
2383 lapic
= kzalloc(sizeof(struct kvm_lapic_state
), GFP_KERNEL
);
2388 r
= kvm_vcpu_ioctl_get_lapic(vcpu
, lapic
);
2392 if (copy_to_user(argp
, lapic
, sizeof(struct kvm_lapic_state
)))
2397 case KVM_SET_LAPIC
: {
2399 if (!vcpu
->arch
.apic
)
2401 lapic
= kmalloc(sizeof(struct kvm_lapic_state
), GFP_KERNEL
);
2406 if (copy_from_user(lapic
, argp
, sizeof(struct kvm_lapic_state
)))
2408 r
= kvm_vcpu_ioctl_set_lapic(vcpu
, lapic
);
2414 case KVM_INTERRUPT
: {
2415 struct kvm_interrupt irq
;
2418 if (copy_from_user(&irq
, argp
, sizeof irq
))
2420 r
= kvm_vcpu_ioctl_interrupt(vcpu
, &irq
);
2427 r
= kvm_vcpu_ioctl_nmi(vcpu
);
2433 case KVM_SET_CPUID
: {
2434 struct kvm_cpuid __user
*cpuid_arg
= argp
;
2435 struct kvm_cpuid cpuid
;
2438 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
2440 r
= kvm_vcpu_ioctl_set_cpuid(vcpu
, &cpuid
, cpuid_arg
->entries
);
2445 case KVM_SET_CPUID2
: {
2446 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
2447 struct kvm_cpuid2 cpuid
;
2450 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
2452 r
= kvm_vcpu_ioctl_set_cpuid2(vcpu
, &cpuid
,
2453 cpuid_arg
->entries
);
2458 case KVM_GET_CPUID2
: {
2459 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
2460 struct kvm_cpuid2 cpuid
;
2463 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
2465 r
= kvm_vcpu_ioctl_get_cpuid2(vcpu
, &cpuid
,
2466 cpuid_arg
->entries
);
2470 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
2476 r
= msr_io(vcpu
, argp
, kvm_get_msr
, 1);
2479 r
= msr_io(vcpu
, argp
, do_set_msr
, 0);
2481 case KVM_TPR_ACCESS_REPORTING
: {
2482 struct kvm_tpr_access_ctl tac
;
2485 if (copy_from_user(&tac
, argp
, sizeof tac
))
2487 r
= vcpu_ioctl_tpr_access_reporting(vcpu
, &tac
);
2491 if (copy_to_user(argp
, &tac
, sizeof tac
))
2496 case KVM_SET_VAPIC_ADDR
: {
2497 struct kvm_vapic_addr va
;
2500 if (!irqchip_in_kernel(vcpu
->kvm
))
2503 if (copy_from_user(&va
, argp
, sizeof va
))
2506 kvm_lapic_set_vapic_addr(vcpu
, va
.vapic_addr
);
2509 case KVM_X86_SETUP_MCE
: {
2513 if (copy_from_user(&mcg_cap
, argp
, sizeof mcg_cap
))
2515 r
= kvm_vcpu_ioctl_x86_setup_mce(vcpu
, mcg_cap
);
2518 case KVM_X86_SET_MCE
: {
2519 struct kvm_x86_mce mce
;
2522 if (copy_from_user(&mce
, argp
, sizeof mce
))
2524 r
= kvm_vcpu_ioctl_x86_set_mce(vcpu
, &mce
);
2527 case KVM_GET_VCPU_EVENTS
: {
2528 struct kvm_vcpu_events events
;
2530 kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu
, &events
);
2533 if (copy_to_user(argp
, &events
, sizeof(struct kvm_vcpu_events
)))
2538 case KVM_SET_VCPU_EVENTS
: {
2539 struct kvm_vcpu_events events
;
2542 if (copy_from_user(&events
, argp
, sizeof(struct kvm_vcpu_events
)))
2545 r
= kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu
, &events
);
2548 case KVM_GET_DEBUGREGS
: {
2549 struct kvm_debugregs dbgregs
;
2551 kvm_vcpu_ioctl_x86_get_debugregs(vcpu
, &dbgregs
);
2554 if (copy_to_user(argp
, &dbgregs
,
2555 sizeof(struct kvm_debugregs
)))
2560 case KVM_SET_DEBUGREGS
: {
2561 struct kvm_debugregs dbgregs
;
2564 if (copy_from_user(&dbgregs
, argp
,
2565 sizeof(struct kvm_debugregs
)))
2568 r
= kvm_vcpu_ioctl_x86_set_debugregs(vcpu
, &dbgregs
);
2579 static int kvm_vm_ioctl_set_tss_addr(struct kvm
*kvm
, unsigned long addr
)
2583 if (addr
> (unsigned int)(-3 * PAGE_SIZE
))
2585 ret
= kvm_x86_ops
->set_tss_addr(kvm
, addr
);
2589 static int kvm_vm_ioctl_set_identity_map_addr(struct kvm
*kvm
,
2592 kvm
->arch
.ept_identity_map_addr
= ident_addr
;
2596 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm
*kvm
,
2597 u32 kvm_nr_mmu_pages
)
2599 if (kvm_nr_mmu_pages
< KVM_MIN_ALLOC_MMU_PAGES
)
2602 mutex_lock(&kvm
->slots_lock
);
2603 spin_lock(&kvm
->mmu_lock
);
2605 kvm_mmu_change_mmu_pages(kvm
, kvm_nr_mmu_pages
);
2606 kvm
->arch
.n_requested_mmu_pages
= kvm_nr_mmu_pages
;
2608 spin_unlock(&kvm
->mmu_lock
);
2609 mutex_unlock(&kvm
->slots_lock
);
2613 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm
*kvm
)
2615 return kvm
->arch
.n_alloc_mmu_pages
;
2618 gfn_t
unalias_gfn_instantiation(struct kvm
*kvm
, gfn_t gfn
)
2621 struct kvm_mem_alias
*alias
;
2622 struct kvm_mem_aliases
*aliases
;
2624 aliases
= kvm_aliases(kvm
);
2626 for (i
= 0; i
< aliases
->naliases
; ++i
) {
2627 alias
= &aliases
->aliases
[i
];
2628 if (alias
->flags
& KVM_ALIAS_INVALID
)
2630 if (gfn
>= alias
->base_gfn
2631 && gfn
< alias
->base_gfn
+ alias
->npages
)
2632 return alias
->target_gfn
+ gfn
- alias
->base_gfn
;
2637 gfn_t
unalias_gfn(struct kvm
*kvm
, gfn_t gfn
)
2640 struct kvm_mem_alias
*alias
;
2641 struct kvm_mem_aliases
*aliases
;
2643 aliases
= kvm_aliases(kvm
);
2645 for (i
= 0; i
< aliases
->naliases
; ++i
) {
2646 alias
= &aliases
->aliases
[i
];
2647 if (gfn
>= alias
->base_gfn
2648 && gfn
< alias
->base_gfn
+ alias
->npages
)
2649 return alias
->target_gfn
+ gfn
- alias
->base_gfn
;
2655 * Set a new alias region. Aliases map a portion of physical memory into
2656 * another portion. This is useful for memory windows, for example the PC
2659 static int kvm_vm_ioctl_set_memory_alias(struct kvm
*kvm
,
2660 struct kvm_memory_alias
*alias
)
2663 struct kvm_mem_alias
*p
;
2664 struct kvm_mem_aliases
*aliases
, *old_aliases
;
2667 /* General sanity checks */
2668 if (alias
->memory_size
& (PAGE_SIZE
- 1))
2670 if (alias
->guest_phys_addr
& (PAGE_SIZE
- 1))
2672 if (alias
->slot
>= KVM_ALIAS_SLOTS
)
2674 if (alias
->guest_phys_addr
+ alias
->memory_size
2675 < alias
->guest_phys_addr
)
2677 if (alias
->target_phys_addr
+ alias
->memory_size
2678 < alias
->target_phys_addr
)
2682 aliases
= kzalloc(sizeof(struct kvm_mem_aliases
), GFP_KERNEL
);
2686 mutex_lock(&kvm
->slots_lock
);
2688 /* invalidate any gfn reference in case of deletion/shrinking */
2689 memcpy(aliases
, kvm
->arch
.aliases
, sizeof(struct kvm_mem_aliases
));
2690 aliases
->aliases
[alias
->slot
].flags
|= KVM_ALIAS_INVALID
;
2691 old_aliases
= kvm
->arch
.aliases
;
2692 rcu_assign_pointer(kvm
->arch
.aliases
, aliases
);
2693 synchronize_srcu_expedited(&kvm
->srcu
);
2694 kvm_mmu_zap_all(kvm
);
2698 aliases
= kzalloc(sizeof(struct kvm_mem_aliases
), GFP_KERNEL
);
2702 memcpy(aliases
, kvm
->arch
.aliases
, sizeof(struct kvm_mem_aliases
));
2704 p
= &aliases
->aliases
[alias
->slot
];
2705 p
->base_gfn
= alias
->guest_phys_addr
>> PAGE_SHIFT
;
2706 p
->npages
= alias
->memory_size
>> PAGE_SHIFT
;
2707 p
->target_gfn
= alias
->target_phys_addr
>> PAGE_SHIFT
;
2708 p
->flags
&= ~(KVM_ALIAS_INVALID
);
2710 for (n
= KVM_ALIAS_SLOTS
; n
> 0; --n
)
2711 if (aliases
->aliases
[n
- 1].npages
)
2713 aliases
->naliases
= n
;
2715 old_aliases
= kvm
->arch
.aliases
;
2716 rcu_assign_pointer(kvm
->arch
.aliases
, aliases
);
2717 synchronize_srcu_expedited(&kvm
->srcu
);
2722 mutex_unlock(&kvm
->slots_lock
);
2727 static int kvm_vm_ioctl_get_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
2732 switch (chip
->chip_id
) {
2733 case KVM_IRQCHIP_PIC_MASTER
:
2734 memcpy(&chip
->chip
.pic
,
2735 &pic_irqchip(kvm
)->pics
[0],
2736 sizeof(struct kvm_pic_state
));
2738 case KVM_IRQCHIP_PIC_SLAVE
:
2739 memcpy(&chip
->chip
.pic
,
2740 &pic_irqchip(kvm
)->pics
[1],
2741 sizeof(struct kvm_pic_state
));
2743 case KVM_IRQCHIP_IOAPIC
:
2744 r
= kvm_get_ioapic(kvm
, &chip
->chip
.ioapic
);
2753 static int kvm_vm_ioctl_set_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
2758 switch (chip
->chip_id
) {
2759 case KVM_IRQCHIP_PIC_MASTER
:
2760 raw_spin_lock(&pic_irqchip(kvm
)->lock
);
2761 memcpy(&pic_irqchip(kvm
)->pics
[0],
2763 sizeof(struct kvm_pic_state
));
2764 raw_spin_unlock(&pic_irqchip(kvm
)->lock
);
2766 case KVM_IRQCHIP_PIC_SLAVE
:
2767 raw_spin_lock(&pic_irqchip(kvm
)->lock
);
2768 memcpy(&pic_irqchip(kvm
)->pics
[1],
2770 sizeof(struct kvm_pic_state
));
2771 raw_spin_unlock(&pic_irqchip(kvm
)->lock
);
2773 case KVM_IRQCHIP_IOAPIC
:
2774 r
= kvm_set_ioapic(kvm
, &chip
->chip
.ioapic
);
2780 kvm_pic_update_irq(pic_irqchip(kvm
));
2784 static int kvm_vm_ioctl_get_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
2788 mutex_lock(&kvm
->arch
.vpit
->pit_state
.lock
);
2789 memcpy(ps
, &kvm
->arch
.vpit
->pit_state
, sizeof(struct kvm_pit_state
));
2790 mutex_unlock(&kvm
->arch
.vpit
->pit_state
.lock
);
2794 static int kvm_vm_ioctl_set_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
2798 mutex_lock(&kvm
->arch
.vpit
->pit_state
.lock
);
2799 memcpy(&kvm
->arch
.vpit
->pit_state
, ps
, sizeof(struct kvm_pit_state
));
2800 kvm_pit_load_count(kvm
, 0, ps
->channels
[0].count
, 0);
2801 mutex_unlock(&kvm
->arch
.vpit
->pit_state
.lock
);
2805 static int kvm_vm_ioctl_get_pit2(struct kvm
*kvm
, struct kvm_pit_state2
*ps
)
2809 mutex_lock(&kvm
->arch
.vpit
->pit_state
.lock
);
2810 memcpy(ps
->channels
, &kvm
->arch
.vpit
->pit_state
.channels
,
2811 sizeof(ps
->channels
));
2812 ps
->flags
= kvm
->arch
.vpit
->pit_state
.flags
;
2813 mutex_unlock(&kvm
->arch
.vpit
->pit_state
.lock
);
2817 static int kvm_vm_ioctl_set_pit2(struct kvm
*kvm
, struct kvm_pit_state2
*ps
)
2819 int r
= 0, start
= 0;
2820 u32 prev_legacy
, cur_legacy
;
2821 mutex_lock(&kvm
->arch
.vpit
->pit_state
.lock
);
2822 prev_legacy
= kvm
->arch
.vpit
->pit_state
.flags
& KVM_PIT_FLAGS_HPET_LEGACY
;
2823 cur_legacy
= ps
->flags
& KVM_PIT_FLAGS_HPET_LEGACY
;
2824 if (!prev_legacy
&& cur_legacy
)
2826 memcpy(&kvm
->arch
.vpit
->pit_state
.channels
, &ps
->channels
,
2827 sizeof(kvm
->arch
.vpit
->pit_state
.channels
));
2828 kvm
->arch
.vpit
->pit_state
.flags
= ps
->flags
;
2829 kvm_pit_load_count(kvm
, 0, kvm
->arch
.vpit
->pit_state
.channels
[0].count
, start
);
2830 mutex_unlock(&kvm
->arch
.vpit
->pit_state
.lock
);
2834 static int kvm_vm_ioctl_reinject(struct kvm
*kvm
,
2835 struct kvm_reinject_control
*control
)
2837 if (!kvm
->arch
.vpit
)
2839 mutex_lock(&kvm
->arch
.vpit
->pit_state
.lock
);
2840 kvm
->arch
.vpit
->pit_state
.pit_timer
.reinject
= control
->pit_reinject
;
2841 mutex_unlock(&kvm
->arch
.vpit
->pit_state
.lock
);
2846 * Get (and clear) the dirty memory log for a memory slot.
2848 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
2849 struct kvm_dirty_log
*log
)
2852 struct kvm_memory_slot
*memslot
;
2854 unsigned long is_dirty
= 0;
2856 mutex_lock(&kvm
->slots_lock
);
2859 if (log
->slot
>= KVM_MEMORY_SLOTS
)
2862 memslot
= &kvm
->memslots
->memslots
[log
->slot
];
2864 if (!memslot
->dirty_bitmap
)
2867 n
= kvm_dirty_bitmap_bytes(memslot
);
2869 for (i
= 0; !is_dirty
&& i
< n
/sizeof(long); i
++)
2870 is_dirty
= memslot
->dirty_bitmap
[i
];
2872 /* If nothing is dirty, don't bother messing with page tables. */
2874 struct kvm_memslots
*slots
, *old_slots
;
2875 unsigned long *dirty_bitmap
;
2877 spin_lock(&kvm
->mmu_lock
);
2878 kvm_mmu_slot_remove_write_access(kvm
, log
->slot
);
2879 spin_unlock(&kvm
->mmu_lock
);
2882 dirty_bitmap
= vmalloc(n
);
2885 memset(dirty_bitmap
, 0, n
);
2888 slots
= kzalloc(sizeof(struct kvm_memslots
), GFP_KERNEL
);
2890 vfree(dirty_bitmap
);
2893 memcpy(slots
, kvm
->memslots
, sizeof(struct kvm_memslots
));
2894 slots
->memslots
[log
->slot
].dirty_bitmap
= dirty_bitmap
;
2896 old_slots
= kvm
->memslots
;
2897 rcu_assign_pointer(kvm
->memslots
, slots
);
2898 synchronize_srcu_expedited(&kvm
->srcu
);
2899 dirty_bitmap
= old_slots
->memslots
[log
->slot
].dirty_bitmap
;
2903 if (copy_to_user(log
->dirty_bitmap
, dirty_bitmap
, n
)) {
2904 vfree(dirty_bitmap
);
2907 vfree(dirty_bitmap
);
2910 if (clear_user(log
->dirty_bitmap
, n
))
2916 mutex_unlock(&kvm
->slots_lock
);
2920 long kvm_arch_vm_ioctl(struct file
*filp
,
2921 unsigned int ioctl
, unsigned long arg
)
2923 struct kvm
*kvm
= filp
->private_data
;
2924 void __user
*argp
= (void __user
*)arg
;
2927 * This union makes it completely explicit to gcc-3.x
2928 * that these two variables' stack usage should be
2929 * combined, not added together.
2932 struct kvm_pit_state ps
;
2933 struct kvm_pit_state2 ps2
;
2934 struct kvm_memory_alias alias
;
2935 struct kvm_pit_config pit_config
;
2939 case KVM_SET_TSS_ADDR
:
2940 r
= kvm_vm_ioctl_set_tss_addr(kvm
, arg
);
2944 case KVM_SET_IDENTITY_MAP_ADDR
: {
2948 if (copy_from_user(&ident_addr
, argp
, sizeof ident_addr
))
2950 r
= kvm_vm_ioctl_set_identity_map_addr(kvm
, ident_addr
);
2955 case KVM_SET_MEMORY_REGION
: {
2956 struct kvm_memory_region kvm_mem
;
2957 struct kvm_userspace_memory_region kvm_userspace_mem
;
2960 if (copy_from_user(&kvm_mem
, argp
, sizeof kvm_mem
))
2962 kvm_userspace_mem
.slot
= kvm_mem
.slot
;
2963 kvm_userspace_mem
.flags
= kvm_mem
.flags
;
2964 kvm_userspace_mem
.guest_phys_addr
= kvm_mem
.guest_phys_addr
;
2965 kvm_userspace_mem
.memory_size
= kvm_mem
.memory_size
;
2966 r
= kvm_vm_ioctl_set_memory_region(kvm
, &kvm_userspace_mem
, 0);
2971 case KVM_SET_NR_MMU_PAGES
:
2972 r
= kvm_vm_ioctl_set_nr_mmu_pages(kvm
, arg
);
2976 case KVM_GET_NR_MMU_PAGES
:
2977 r
= kvm_vm_ioctl_get_nr_mmu_pages(kvm
);
2979 case KVM_SET_MEMORY_ALIAS
:
2981 if (copy_from_user(&u
.alias
, argp
, sizeof(struct kvm_memory_alias
)))
2983 r
= kvm_vm_ioctl_set_memory_alias(kvm
, &u
.alias
);
2987 case KVM_CREATE_IRQCHIP
: {
2988 struct kvm_pic
*vpic
;
2990 mutex_lock(&kvm
->lock
);
2993 goto create_irqchip_unlock
;
2995 vpic
= kvm_create_pic(kvm
);
2997 r
= kvm_ioapic_init(kvm
);
2999 kvm_io_bus_unregister_dev(kvm
, KVM_PIO_BUS
,
3002 goto create_irqchip_unlock
;
3005 goto create_irqchip_unlock
;
3007 kvm
->arch
.vpic
= vpic
;
3009 r
= kvm_setup_default_irq_routing(kvm
);
3011 mutex_lock(&kvm
->irq_lock
);
3012 kvm_ioapic_destroy(kvm
);
3013 kvm_destroy_pic(kvm
);
3014 mutex_unlock(&kvm
->irq_lock
);
3016 create_irqchip_unlock
:
3017 mutex_unlock(&kvm
->lock
);
3020 case KVM_CREATE_PIT
:
3021 u
.pit_config
.flags
= KVM_PIT_SPEAKER_DUMMY
;
3023 case KVM_CREATE_PIT2
:
3025 if (copy_from_user(&u
.pit_config
, argp
,
3026 sizeof(struct kvm_pit_config
)))
3029 mutex_lock(&kvm
->slots_lock
);
3032 goto create_pit_unlock
;
3034 kvm
->arch
.vpit
= kvm_create_pit(kvm
, u
.pit_config
.flags
);
3038 mutex_unlock(&kvm
->slots_lock
);
3040 case KVM_IRQ_LINE_STATUS
:
3041 case KVM_IRQ_LINE
: {
3042 struct kvm_irq_level irq_event
;
3045 if (copy_from_user(&irq_event
, argp
, sizeof irq_event
))
3048 if (irqchip_in_kernel(kvm
)) {
3050 status
= kvm_set_irq(kvm
, KVM_USERSPACE_IRQ_SOURCE_ID
,
3051 irq_event
.irq
, irq_event
.level
);
3052 if (ioctl
== KVM_IRQ_LINE_STATUS
) {
3054 irq_event
.status
= status
;
3055 if (copy_to_user(argp
, &irq_event
,
3063 case KVM_GET_IRQCHIP
: {
3064 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3065 struct kvm_irqchip
*chip
= kmalloc(sizeof(*chip
), GFP_KERNEL
);
3071 if (copy_from_user(chip
, argp
, sizeof *chip
))
3072 goto get_irqchip_out
;
3074 if (!irqchip_in_kernel(kvm
))
3075 goto get_irqchip_out
;
3076 r
= kvm_vm_ioctl_get_irqchip(kvm
, chip
);
3078 goto get_irqchip_out
;
3080 if (copy_to_user(argp
, chip
, sizeof *chip
))
3081 goto get_irqchip_out
;
3089 case KVM_SET_IRQCHIP
: {
3090 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3091 struct kvm_irqchip
*chip
= kmalloc(sizeof(*chip
), GFP_KERNEL
);
3097 if (copy_from_user(chip
, argp
, sizeof *chip
))
3098 goto set_irqchip_out
;
3100 if (!irqchip_in_kernel(kvm
))
3101 goto set_irqchip_out
;
3102 r
= kvm_vm_ioctl_set_irqchip(kvm
, chip
);
3104 goto set_irqchip_out
;
3114 if (copy_from_user(&u
.ps
, argp
, sizeof(struct kvm_pit_state
)))
3117 if (!kvm
->arch
.vpit
)
3119 r
= kvm_vm_ioctl_get_pit(kvm
, &u
.ps
);
3123 if (copy_to_user(argp
, &u
.ps
, sizeof(struct kvm_pit_state
)))
3130 if (copy_from_user(&u
.ps
, argp
, sizeof u
.ps
))
3133 if (!kvm
->arch
.vpit
)
3135 r
= kvm_vm_ioctl_set_pit(kvm
, &u
.ps
);
3141 case KVM_GET_PIT2
: {
3143 if (!kvm
->arch
.vpit
)
3145 r
= kvm_vm_ioctl_get_pit2(kvm
, &u
.ps2
);
3149 if (copy_to_user(argp
, &u
.ps2
, sizeof(u
.ps2
)))
3154 case KVM_SET_PIT2
: {
3156 if (copy_from_user(&u
.ps2
, argp
, sizeof(u
.ps2
)))
3159 if (!kvm
->arch
.vpit
)
3161 r
= kvm_vm_ioctl_set_pit2(kvm
, &u
.ps2
);
3167 case KVM_REINJECT_CONTROL
: {
3168 struct kvm_reinject_control control
;
3170 if (copy_from_user(&control
, argp
, sizeof(control
)))
3172 r
= kvm_vm_ioctl_reinject(kvm
, &control
);
3178 case KVM_XEN_HVM_CONFIG
: {
3180 if (copy_from_user(&kvm
->arch
.xen_hvm_config
, argp
,
3181 sizeof(struct kvm_xen_hvm_config
)))
3184 if (kvm
->arch
.xen_hvm_config
.flags
)
3189 case KVM_SET_CLOCK
: {
3190 struct timespec now
;
3191 struct kvm_clock_data user_ns
;
3196 if (copy_from_user(&user_ns
, argp
, sizeof(user_ns
)))
3205 now_ns
= timespec_to_ns(&now
);
3206 delta
= user_ns
.clock
- now_ns
;
3207 kvm
->arch
.kvmclock_offset
= delta
;
3210 case KVM_GET_CLOCK
: {
3211 struct timespec now
;
3212 struct kvm_clock_data user_ns
;
3216 now_ns
= timespec_to_ns(&now
);
3217 user_ns
.clock
= kvm
->arch
.kvmclock_offset
+ now_ns
;
3221 if (copy_to_user(argp
, &user_ns
, sizeof(user_ns
)))
3234 static void kvm_init_msr_list(void)
3239 /* skip the first msrs in the list. KVM-specific */
3240 for (i
= j
= KVM_SAVE_MSRS_BEGIN
; i
< ARRAY_SIZE(msrs_to_save
); i
++) {
3241 if (rdmsr_safe(msrs_to_save
[i
], &dummy
[0], &dummy
[1]) < 0)
3244 msrs_to_save
[j
] = msrs_to_save
[i
];
3247 num_msrs_to_save
= j
;
3250 static int vcpu_mmio_write(struct kvm_vcpu
*vcpu
, gpa_t addr
, int len
,
3253 if (vcpu
->arch
.apic
&&
3254 !kvm_iodevice_write(&vcpu
->arch
.apic
->dev
, addr
, len
, v
))
3257 return kvm_io_bus_write(vcpu
->kvm
, KVM_MMIO_BUS
, addr
, len
, v
);
3260 static int vcpu_mmio_read(struct kvm_vcpu
*vcpu
, gpa_t addr
, int len
, void *v
)
3262 if (vcpu
->arch
.apic
&&
3263 !kvm_iodevice_read(&vcpu
->arch
.apic
->dev
, addr
, len
, v
))
3266 return kvm_io_bus_read(vcpu
->kvm
, KVM_MMIO_BUS
, addr
, len
, v
);
3269 static void kvm_set_segment(struct kvm_vcpu
*vcpu
,
3270 struct kvm_segment
*var
, int seg
)
3272 kvm_x86_ops
->set_segment(vcpu
, var
, seg
);
3275 void kvm_get_segment(struct kvm_vcpu
*vcpu
,
3276 struct kvm_segment
*var
, int seg
)
3278 kvm_x86_ops
->get_segment(vcpu
, var
, seg
);
3281 gpa_t
kvm_mmu_gva_to_gpa_read(struct kvm_vcpu
*vcpu
, gva_t gva
, u32
*error
)
3283 u32 access
= (kvm_x86_ops
->get_cpl(vcpu
) == 3) ? PFERR_USER_MASK
: 0;
3284 return vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, gva
, access
, error
);
3287 gpa_t
kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu
*vcpu
, gva_t gva
, u32
*error
)
3289 u32 access
= (kvm_x86_ops
->get_cpl(vcpu
) == 3) ? PFERR_USER_MASK
: 0;
3290 access
|= PFERR_FETCH_MASK
;
3291 return vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, gva
, access
, error
);
3294 gpa_t
kvm_mmu_gva_to_gpa_write(struct kvm_vcpu
*vcpu
, gva_t gva
, u32
*error
)
3296 u32 access
= (kvm_x86_ops
->get_cpl(vcpu
) == 3) ? PFERR_USER_MASK
: 0;
3297 access
|= PFERR_WRITE_MASK
;
3298 return vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, gva
, access
, error
);
3301 /* uses this to access any guest's mapped memory without checking CPL */
3302 gpa_t
kvm_mmu_gva_to_gpa_system(struct kvm_vcpu
*vcpu
, gva_t gva
, u32
*error
)
3304 return vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, gva
, 0, error
);
3307 static int kvm_read_guest_virt_helper(gva_t addr
, void *val
, unsigned int bytes
,
3308 struct kvm_vcpu
*vcpu
, u32 access
,
3312 int r
= X86EMUL_CONTINUE
;
3315 gpa_t gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
, access
, error
);
3316 unsigned offset
= addr
& (PAGE_SIZE
-1);
3317 unsigned toread
= min(bytes
, (unsigned)PAGE_SIZE
- offset
);
3320 if (gpa
== UNMAPPED_GVA
) {
3321 r
= X86EMUL_PROPAGATE_FAULT
;
3324 ret
= kvm_read_guest(vcpu
->kvm
, gpa
, data
, toread
);
3326 r
= X86EMUL_IO_NEEDED
;
3338 /* used for instruction fetching */
3339 static int kvm_fetch_guest_virt(gva_t addr
, void *val
, unsigned int bytes
,
3340 struct kvm_vcpu
*vcpu
, u32
*error
)
3342 u32 access
= (kvm_x86_ops
->get_cpl(vcpu
) == 3) ? PFERR_USER_MASK
: 0;
3343 return kvm_read_guest_virt_helper(addr
, val
, bytes
, vcpu
,
3344 access
| PFERR_FETCH_MASK
, error
);
3347 static int kvm_read_guest_virt(gva_t addr
, void *val
, unsigned int bytes
,
3348 struct kvm_vcpu
*vcpu
, u32
*error
)
3350 u32 access
= (kvm_x86_ops
->get_cpl(vcpu
) == 3) ? PFERR_USER_MASK
: 0;
3351 return kvm_read_guest_virt_helper(addr
, val
, bytes
, vcpu
, access
,
3355 static int kvm_read_guest_virt_system(gva_t addr
, void *val
, unsigned int bytes
,
3356 struct kvm_vcpu
*vcpu
, u32
*error
)
3358 return kvm_read_guest_virt_helper(addr
, val
, bytes
, vcpu
, 0, error
);
3361 static int kvm_write_guest_virt_system(gva_t addr
, void *val
,
3363 struct kvm_vcpu
*vcpu
,
3367 int r
= X86EMUL_CONTINUE
;
3370 gpa_t gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
,
3371 PFERR_WRITE_MASK
, error
);
3372 unsigned offset
= addr
& (PAGE_SIZE
-1);
3373 unsigned towrite
= min(bytes
, (unsigned)PAGE_SIZE
- offset
);
3376 if (gpa
== UNMAPPED_GVA
) {
3377 r
= X86EMUL_PROPAGATE_FAULT
;
3380 ret
= kvm_write_guest(vcpu
->kvm
, gpa
, data
, towrite
);
3382 r
= X86EMUL_IO_NEEDED
;
3394 static int emulator_read_emulated(unsigned long addr
,
3397 unsigned int *error_code
,
3398 struct kvm_vcpu
*vcpu
)
3402 if (vcpu
->mmio_read_completed
) {
3403 memcpy(val
, vcpu
->mmio_data
, bytes
);
3404 trace_kvm_mmio(KVM_TRACE_MMIO_READ
, bytes
,
3405 vcpu
->mmio_phys_addr
, *(u64
*)val
);
3406 vcpu
->mmio_read_completed
= 0;
3407 return X86EMUL_CONTINUE
;
3410 gpa
= kvm_mmu_gva_to_gpa_read(vcpu
, addr
, error_code
);
3412 if (gpa
== UNMAPPED_GVA
)
3413 return X86EMUL_PROPAGATE_FAULT
;
3415 /* For APIC access vmexit */
3416 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
3419 if (kvm_read_guest_virt(addr
, val
, bytes
, vcpu
, NULL
)
3420 == X86EMUL_CONTINUE
)
3421 return X86EMUL_CONTINUE
;
3425 * Is this MMIO handled locally?
3427 if (!vcpu_mmio_read(vcpu
, gpa
, bytes
, val
)) {
3428 trace_kvm_mmio(KVM_TRACE_MMIO_READ
, bytes
, gpa
, *(u64
*)val
);
3429 return X86EMUL_CONTINUE
;
3432 trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED
, bytes
, gpa
, 0);
3434 vcpu
->mmio_needed
= 1;
3435 vcpu
->run
->exit_reason
= KVM_EXIT_MMIO
;
3436 vcpu
->run
->mmio
.phys_addr
= vcpu
->mmio_phys_addr
= gpa
;
3437 vcpu
->run
->mmio
.len
= vcpu
->mmio_size
= bytes
;
3438 vcpu
->run
->mmio
.is_write
= vcpu
->mmio_is_write
= 0;
3440 return X86EMUL_IO_NEEDED
;
3443 int emulator_write_phys(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
3444 const void *val
, int bytes
)
3448 ret
= kvm_write_guest(vcpu
->kvm
, gpa
, val
, bytes
);
3451 kvm_mmu_pte_write(vcpu
, gpa
, val
, bytes
, 1);
3455 static int emulator_write_emulated_onepage(unsigned long addr
,
3458 unsigned int *error_code
,
3459 struct kvm_vcpu
*vcpu
)
3463 gpa
= kvm_mmu_gva_to_gpa_write(vcpu
, addr
, error_code
);
3465 if (gpa
== UNMAPPED_GVA
)
3466 return X86EMUL_PROPAGATE_FAULT
;
3468 /* For APIC access vmexit */
3469 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
3472 if (emulator_write_phys(vcpu
, gpa
, val
, bytes
))
3473 return X86EMUL_CONTINUE
;
3476 trace_kvm_mmio(KVM_TRACE_MMIO_WRITE
, bytes
, gpa
, *(u64
*)val
);
3478 * Is this MMIO handled locally?
3480 if (!vcpu_mmio_write(vcpu
, gpa
, bytes
, val
))
3481 return X86EMUL_CONTINUE
;
3483 vcpu
->mmio_needed
= 1;
3484 vcpu
->run
->exit_reason
= KVM_EXIT_MMIO
;
3485 vcpu
->run
->mmio
.phys_addr
= vcpu
->mmio_phys_addr
= gpa
;
3486 vcpu
->run
->mmio
.len
= vcpu
->mmio_size
= bytes
;
3487 vcpu
->run
->mmio
.is_write
= vcpu
->mmio_is_write
= 1;
3488 memcpy(vcpu
->run
->mmio
.data
, val
, bytes
);
3490 return X86EMUL_CONTINUE
;
3493 int emulator_write_emulated(unsigned long addr
,
3496 unsigned int *error_code
,
3497 struct kvm_vcpu
*vcpu
)
3499 /* Crossing a page boundary? */
3500 if (((addr
+ bytes
- 1) ^ addr
) & PAGE_MASK
) {
3503 now
= -addr
& ~PAGE_MASK
;
3504 rc
= emulator_write_emulated_onepage(addr
, val
, now
, error_code
,
3506 if (rc
!= X86EMUL_CONTINUE
)
3512 return emulator_write_emulated_onepage(addr
, val
, bytes
, error_code
,
3516 #define CMPXCHG_TYPE(t, ptr, old, new) \
3517 (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old))
3519 #ifdef CONFIG_X86_64
3520 # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new)
3522 # define CMPXCHG64(ptr, old, new) \
3523 (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old))
3526 static int emulator_cmpxchg_emulated(unsigned long addr
,
3530 unsigned int *error_code
,
3531 struct kvm_vcpu
*vcpu
)
3538 /* guests cmpxchg8b have to be emulated atomically */
3539 if (bytes
> 8 || (bytes
& (bytes
- 1)))
3542 gpa
= kvm_mmu_gva_to_gpa_write(vcpu
, addr
, NULL
);
3544 if (gpa
== UNMAPPED_GVA
||
3545 (gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
3548 if (((gpa
+ bytes
- 1) & PAGE_MASK
) != (gpa
& PAGE_MASK
))
3551 page
= gfn_to_page(vcpu
->kvm
, gpa
>> PAGE_SHIFT
);
3553 kaddr
= kmap_atomic(page
, KM_USER0
);
3554 kaddr
+= offset_in_page(gpa
);
3557 exchanged
= CMPXCHG_TYPE(u8
, kaddr
, old
, new);
3560 exchanged
= CMPXCHG_TYPE(u16
, kaddr
, old
, new);
3563 exchanged
= CMPXCHG_TYPE(u32
, kaddr
, old
, new);
3566 exchanged
= CMPXCHG64(kaddr
, old
, new);
3571 kunmap_atomic(kaddr
, KM_USER0
);
3572 kvm_release_page_dirty(page
);
3575 return X86EMUL_CMPXCHG_FAILED
;
3577 kvm_mmu_pte_write(vcpu
, gpa
, new, bytes
, 1);
3579 return X86EMUL_CONTINUE
;
3582 printk_once(KERN_WARNING
"kvm: emulating exchange as write\n");
3584 return emulator_write_emulated(addr
, new, bytes
, error_code
, vcpu
);
3587 static int kernel_pio(struct kvm_vcpu
*vcpu
, void *pd
)
3589 /* TODO: String I/O for in kernel device */
3592 if (vcpu
->arch
.pio
.in
)
3593 r
= kvm_io_bus_read(vcpu
->kvm
, KVM_PIO_BUS
, vcpu
->arch
.pio
.port
,
3594 vcpu
->arch
.pio
.size
, pd
);
3596 r
= kvm_io_bus_write(vcpu
->kvm
, KVM_PIO_BUS
,
3597 vcpu
->arch
.pio
.port
, vcpu
->arch
.pio
.size
,
3603 static int emulator_pio_in_emulated(int size
, unsigned short port
, void *val
,
3604 unsigned int count
, struct kvm_vcpu
*vcpu
)
3606 if (vcpu
->arch
.pio
.count
)
3609 trace_kvm_pio(1, port
, size
, 1);
3611 vcpu
->arch
.pio
.port
= port
;
3612 vcpu
->arch
.pio
.in
= 1;
3613 vcpu
->arch
.pio
.count
= count
;
3614 vcpu
->arch
.pio
.size
= size
;
3616 if (!kernel_pio(vcpu
, vcpu
->arch
.pio_data
)) {
3618 memcpy(val
, vcpu
->arch
.pio_data
, size
* count
);
3619 vcpu
->arch
.pio
.count
= 0;
3623 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
3624 vcpu
->run
->io
.direction
= KVM_EXIT_IO_IN
;
3625 vcpu
->run
->io
.size
= size
;
3626 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
3627 vcpu
->run
->io
.count
= count
;
3628 vcpu
->run
->io
.port
= port
;
3633 static int emulator_pio_out_emulated(int size
, unsigned short port
,
3634 const void *val
, unsigned int count
,
3635 struct kvm_vcpu
*vcpu
)
3637 trace_kvm_pio(0, port
, size
, 1);
3639 vcpu
->arch
.pio
.port
= port
;
3640 vcpu
->arch
.pio
.in
= 0;
3641 vcpu
->arch
.pio
.count
= count
;
3642 vcpu
->arch
.pio
.size
= size
;
3644 memcpy(vcpu
->arch
.pio_data
, val
, size
* count
);
3646 if (!kernel_pio(vcpu
, vcpu
->arch
.pio_data
)) {
3647 vcpu
->arch
.pio
.count
= 0;
3651 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
3652 vcpu
->run
->io
.direction
= KVM_EXIT_IO_OUT
;
3653 vcpu
->run
->io
.size
= size
;
3654 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
3655 vcpu
->run
->io
.count
= count
;
3656 vcpu
->run
->io
.port
= port
;
3661 static unsigned long get_segment_base(struct kvm_vcpu
*vcpu
, int seg
)
3663 return kvm_x86_ops
->get_segment_base(vcpu
, seg
);
3666 int emulate_invlpg(struct kvm_vcpu
*vcpu
, gva_t address
)
3668 kvm_mmu_invlpg(vcpu
, address
);
3669 return X86EMUL_CONTINUE
;
3672 int emulate_clts(struct kvm_vcpu
*vcpu
)
3674 kvm_x86_ops
->set_cr0(vcpu
, kvm_read_cr0_bits(vcpu
, ~X86_CR0_TS
));
3675 kvm_x86_ops
->fpu_activate(vcpu
);
3676 return X86EMUL_CONTINUE
;
3679 int emulator_get_dr(int dr
, unsigned long *dest
, struct kvm_vcpu
*vcpu
)
3681 return _kvm_get_dr(vcpu
, dr
, dest
);
3684 int emulator_set_dr(int dr
, unsigned long value
, struct kvm_vcpu
*vcpu
)
3687 return __kvm_set_dr(vcpu
, dr
, value
);
3690 static u64
mk_cr_64(u64 curr_cr
, u32 new_val
)
3692 return (curr_cr
& ~((1ULL << 32) - 1)) | new_val
;
3695 static unsigned long emulator_get_cr(int cr
, struct kvm_vcpu
*vcpu
)
3697 unsigned long value
;
3701 value
= kvm_read_cr0(vcpu
);
3704 value
= vcpu
->arch
.cr2
;
3707 value
= vcpu
->arch
.cr3
;
3710 value
= kvm_read_cr4(vcpu
);
3713 value
= kvm_get_cr8(vcpu
);
3716 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
3723 static int emulator_set_cr(int cr
, unsigned long val
, struct kvm_vcpu
*vcpu
)
3729 res
= kvm_set_cr0(vcpu
, mk_cr_64(kvm_read_cr0(vcpu
), val
));
3732 vcpu
->arch
.cr2
= val
;
3735 res
= __kvm_set_cr3(vcpu
, val
);
3738 res
= __kvm_set_cr4(vcpu
, mk_cr_64(kvm_read_cr4(vcpu
), val
));
3741 res
= __kvm_set_cr8(vcpu
, val
& 0xfUL
);
3744 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
3751 static int emulator_get_cpl(struct kvm_vcpu
*vcpu
)
3753 return kvm_x86_ops
->get_cpl(vcpu
);
3756 static void emulator_get_gdt(struct desc_ptr
*dt
, struct kvm_vcpu
*vcpu
)
3758 kvm_x86_ops
->get_gdt(vcpu
, dt
);
3761 static unsigned long emulator_get_cached_segment_base(int seg
,
3762 struct kvm_vcpu
*vcpu
)
3764 return get_segment_base(vcpu
, seg
);
3767 static bool emulator_get_cached_descriptor(struct desc_struct
*desc
, int seg
,
3768 struct kvm_vcpu
*vcpu
)
3770 struct kvm_segment var
;
3772 kvm_get_segment(vcpu
, &var
, seg
);
3779 set_desc_limit(desc
, var
.limit
);
3780 set_desc_base(desc
, (unsigned long)var
.base
);
3781 desc
->type
= var
.type
;
3783 desc
->dpl
= var
.dpl
;
3784 desc
->p
= var
.present
;
3785 desc
->avl
= var
.avl
;
3793 static void emulator_set_cached_descriptor(struct desc_struct
*desc
, int seg
,
3794 struct kvm_vcpu
*vcpu
)
3796 struct kvm_segment var
;
3798 /* needed to preserve selector */
3799 kvm_get_segment(vcpu
, &var
, seg
);
3801 var
.base
= get_desc_base(desc
);
3802 var
.limit
= get_desc_limit(desc
);
3804 var
.limit
= (var
.limit
<< 12) | 0xfff;
3805 var
.type
= desc
->type
;
3806 var
.present
= desc
->p
;
3807 var
.dpl
= desc
->dpl
;
3812 var
.avl
= desc
->avl
;
3813 var
.present
= desc
->p
;
3814 var
.unusable
= !var
.present
;
3817 kvm_set_segment(vcpu
, &var
, seg
);
3821 static u16
emulator_get_segment_selector(int seg
, struct kvm_vcpu
*vcpu
)
3823 struct kvm_segment kvm_seg
;
3825 kvm_get_segment(vcpu
, &kvm_seg
, seg
);
3826 return kvm_seg
.selector
;
3829 static void emulator_set_segment_selector(u16 sel
, int seg
,
3830 struct kvm_vcpu
*vcpu
)
3832 struct kvm_segment kvm_seg
;
3834 kvm_get_segment(vcpu
, &kvm_seg
, seg
);
3835 kvm_seg
.selector
= sel
;
3836 kvm_set_segment(vcpu
, &kvm_seg
, seg
);
3839 static struct x86_emulate_ops emulate_ops
= {
3840 .read_std
= kvm_read_guest_virt_system
,
3841 .write_std
= kvm_write_guest_virt_system
,
3842 .fetch
= kvm_fetch_guest_virt
,
3843 .read_emulated
= emulator_read_emulated
,
3844 .write_emulated
= emulator_write_emulated
,
3845 .cmpxchg_emulated
= emulator_cmpxchg_emulated
,
3846 .pio_in_emulated
= emulator_pio_in_emulated
,
3847 .pio_out_emulated
= emulator_pio_out_emulated
,
3848 .get_cached_descriptor
= emulator_get_cached_descriptor
,
3849 .set_cached_descriptor
= emulator_set_cached_descriptor
,
3850 .get_segment_selector
= emulator_get_segment_selector
,
3851 .set_segment_selector
= emulator_set_segment_selector
,
3852 .get_cached_segment_base
= emulator_get_cached_segment_base
,
3853 .get_gdt
= emulator_get_gdt
,
3854 .get_cr
= emulator_get_cr
,
3855 .set_cr
= emulator_set_cr
,
3856 .cpl
= emulator_get_cpl
,
3857 .get_dr
= emulator_get_dr
,
3858 .set_dr
= emulator_set_dr
,
3859 .set_msr
= kvm_set_msr
,
3860 .get_msr
= kvm_get_msr
,
3863 static void cache_all_regs(struct kvm_vcpu
*vcpu
)
3865 kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3866 kvm_register_read(vcpu
, VCPU_REGS_RSP
);
3867 kvm_register_read(vcpu
, VCPU_REGS_RIP
);
3868 vcpu
->arch
.regs_dirty
= ~0;
3871 static void toggle_interruptibility(struct kvm_vcpu
*vcpu
, u32 mask
)
3873 u32 int_shadow
= kvm_x86_ops
->get_interrupt_shadow(vcpu
, mask
);
3875 * an sti; sti; sequence only disable interrupts for the first
3876 * instruction. So, if the last instruction, be it emulated or
3877 * not, left the system with the INT_STI flag enabled, it
3878 * means that the last instruction is an sti. We should not
3879 * leave the flag on in this case. The same goes for mov ss
3881 if (!(int_shadow
& mask
))
3882 kvm_x86_ops
->set_interrupt_shadow(vcpu
, mask
);
3885 static void inject_emulated_exception(struct kvm_vcpu
*vcpu
)
3887 struct x86_emulate_ctxt
*ctxt
= &vcpu
->arch
.emulate_ctxt
;
3888 if (ctxt
->exception
== PF_VECTOR
)
3889 kvm_inject_page_fault(vcpu
, ctxt
->cr2
, ctxt
->error_code
);
3890 else if (ctxt
->error_code_valid
)
3891 kvm_queue_exception_e(vcpu
, ctxt
->exception
, ctxt
->error_code
);
3893 kvm_queue_exception(vcpu
, ctxt
->exception
);
3896 static int handle_emulation_failure(struct kvm_vcpu
*vcpu
)
3898 ++vcpu
->stat
.insn_emulation_fail
;
3899 trace_kvm_emulate_insn_failed(vcpu
);
3900 vcpu
->run
->exit_reason
= KVM_EXIT_INTERNAL_ERROR
;
3901 vcpu
->run
->internal
.suberror
= KVM_INTERNAL_ERROR_EMULATION
;
3902 vcpu
->run
->internal
.ndata
= 0;
3903 kvm_queue_exception(vcpu
, UD_VECTOR
);
3904 return EMULATE_FAIL
;
3907 int emulate_instruction(struct kvm_vcpu
*vcpu
,
3913 struct decode_cache
*c
= &vcpu
->arch
.emulate_ctxt
.decode
;
3915 kvm_clear_exception_queue(vcpu
);
3916 vcpu
->arch
.mmio_fault_cr2
= cr2
;
3918 * TODO: fix emulate.c to use guest_read/write_register
3919 * instead of direct ->regs accesses, can save hundred cycles
3920 * on Intel for instructions that don't read/change RSP, for
3923 cache_all_regs(vcpu
);
3925 if (!(emulation_type
& EMULTYPE_NO_DECODE
)) {
3927 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
3929 vcpu
->arch
.emulate_ctxt
.vcpu
= vcpu
;
3930 vcpu
->arch
.emulate_ctxt
.eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3931 vcpu
->arch
.emulate_ctxt
.eip
= kvm_rip_read(vcpu
);
3932 vcpu
->arch
.emulate_ctxt
.mode
=
3933 (!is_protmode(vcpu
)) ? X86EMUL_MODE_REAL
:
3934 (vcpu
->arch
.emulate_ctxt
.eflags
& X86_EFLAGS_VM
)
3935 ? X86EMUL_MODE_VM86
: cs_l
3936 ? X86EMUL_MODE_PROT64
: cs_db
3937 ? X86EMUL_MODE_PROT32
: X86EMUL_MODE_PROT16
;
3938 memset(c
, 0, sizeof(struct decode_cache
));
3939 memcpy(c
->regs
, vcpu
->arch
.regs
, sizeof c
->regs
);
3940 vcpu
->arch
.emulate_ctxt
.interruptibility
= 0;
3941 vcpu
->arch
.emulate_ctxt
.exception
= -1;
3943 r
= x86_decode_insn(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
);
3944 trace_kvm_emulate_insn_start(vcpu
);
3946 /* Only allow emulation of specific instructions on #UD
3947 * (namely VMMCALL, sysenter, sysexit, syscall)*/
3948 if (emulation_type
& EMULTYPE_TRAP_UD
) {
3950 return EMULATE_FAIL
;
3952 case 0x01: /* VMMCALL */
3953 if (c
->modrm_mod
!= 3 || c
->modrm_rm
!= 1)
3954 return EMULATE_FAIL
;
3956 case 0x34: /* sysenter */
3957 case 0x35: /* sysexit */
3958 if (c
->modrm_mod
!= 0 || c
->modrm_rm
!= 0)
3959 return EMULATE_FAIL
;
3961 case 0x05: /* syscall */
3962 if (c
->modrm_mod
!= 0 || c
->modrm_rm
!= 0)
3963 return EMULATE_FAIL
;
3966 return EMULATE_FAIL
;
3969 if (!(c
->modrm_reg
== 0 || c
->modrm_reg
== 3))
3970 return EMULATE_FAIL
;
3973 ++vcpu
->stat
.insn_emulation
;
3975 if (kvm_mmu_unprotect_page_virt(vcpu
, cr2
))
3976 return EMULATE_DONE
;
3977 if (emulation_type
& EMULTYPE_SKIP
)
3978 return EMULATE_FAIL
;
3979 return handle_emulation_failure(vcpu
);
3983 if (emulation_type
& EMULTYPE_SKIP
) {
3984 kvm_rip_write(vcpu
, vcpu
->arch
.emulate_ctxt
.decode
.eip
);
3985 return EMULATE_DONE
;
3988 /* this is needed for vmware backdor interface to work since it
3989 changes registers values during IO operation */
3990 memcpy(c
->regs
, vcpu
->arch
.regs
, sizeof c
->regs
);
3993 r
= x86_emulate_insn(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
);
3995 if (r
) { /* emulation failed */
3997 * if emulation was due to access to shadowed page table
3998 * and it failed try to unshadow page and re-entetr the
3999 * guest to let CPU execute the instruction.
4001 if (kvm_mmu_unprotect_page_virt(vcpu
, cr2
))
4002 return EMULATE_DONE
;
4004 return handle_emulation_failure(vcpu
);
4007 toggle_interruptibility(vcpu
, vcpu
->arch
.emulate_ctxt
.interruptibility
);
4008 kvm_x86_ops
->set_rflags(vcpu
, vcpu
->arch
.emulate_ctxt
.eflags
);
4009 memcpy(vcpu
->arch
.regs
, c
->regs
, sizeof c
->regs
);
4010 kvm_rip_write(vcpu
, vcpu
->arch
.emulate_ctxt
.eip
);
4012 if (vcpu
->arch
.emulate_ctxt
.exception
>= 0) {
4013 inject_emulated_exception(vcpu
);
4014 return EMULATE_DONE
;
4017 if (vcpu
->arch
.pio
.count
) {
4018 if (!vcpu
->arch
.pio
.in
)
4019 vcpu
->arch
.pio
.count
= 0;
4020 return EMULATE_DO_MMIO
;
4023 if (vcpu
->mmio_needed
) {
4024 if (vcpu
->mmio_is_write
)
4025 vcpu
->mmio_needed
= 0;
4026 return EMULATE_DO_MMIO
;
4029 if (vcpu
->arch
.emulate_ctxt
.restart
)
4032 return EMULATE_DONE
;
4034 EXPORT_SYMBOL_GPL(emulate_instruction
);
4036 int kvm_fast_pio_out(struct kvm_vcpu
*vcpu
, int size
, unsigned short port
)
4038 unsigned long val
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
4039 int ret
= emulator_pio_out_emulated(size
, port
, &val
, 1, vcpu
);
4040 /* do not return to emulator after return from userspace */
4041 vcpu
->arch
.pio
.count
= 0;
4044 EXPORT_SYMBOL_GPL(kvm_fast_pio_out
);
4046 static void bounce_off(void *info
)
4051 static int kvmclock_cpufreq_notifier(struct notifier_block
*nb
, unsigned long val
,
4054 struct cpufreq_freqs
*freq
= data
;
4056 struct kvm_vcpu
*vcpu
;
4057 int i
, send_ipi
= 0;
4059 if (val
== CPUFREQ_PRECHANGE
&& freq
->old
> freq
->new)
4061 if (val
== CPUFREQ_POSTCHANGE
&& freq
->old
< freq
->new)
4063 per_cpu(cpu_tsc_khz
, freq
->cpu
) = freq
->new;
4065 spin_lock(&kvm_lock
);
4066 list_for_each_entry(kvm
, &vm_list
, vm_list
) {
4067 kvm_for_each_vcpu(i
, vcpu
, kvm
) {
4068 if (vcpu
->cpu
!= freq
->cpu
)
4070 if (!kvm_request_guest_time_update(vcpu
))
4072 if (vcpu
->cpu
!= smp_processor_id())
4076 spin_unlock(&kvm_lock
);
4078 if (freq
->old
< freq
->new && send_ipi
) {
4080 * We upscale the frequency. Must make the guest
4081 * doesn't see old kvmclock values while running with
4082 * the new frequency, otherwise we risk the guest sees
4083 * time go backwards.
4085 * In case we update the frequency for another cpu
4086 * (which might be in guest context) send an interrupt
4087 * to kick the cpu out of guest context. Next time
4088 * guest context is entered kvmclock will be updated,
4089 * so the guest will not see stale values.
4091 smp_call_function_single(freq
->cpu
, bounce_off
, NULL
, 1);
4096 static struct notifier_block kvmclock_cpufreq_notifier_block
= {
4097 .notifier_call
= kvmclock_cpufreq_notifier
4100 static void kvm_timer_init(void)
4104 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC
)) {
4105 cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block
,
4106 CPUFREQ_TRANSITION_NOTIFIER
);
4107 for_each_online_cpu(cpu
) {
4108 unsigned long khz
= cpufreq_get(cpu
);
4111 per_cpu(cpu_tsc_khz
, cpu
) = khz
;
4114 for_each_possible_cpu(cpu
)
4115 per_cpu(cpu_tsc_khz
, cpu
) = tsc_khz
;
4119 static DEFINE_PER_CPU(struct kvm_vcpu
*, current_vcpu
);
4121 static int kvm_is_in_guest(void)
4123 return percpu_read(current_vcpu
) != NULL
;
4126 static int kvm_is_user_mode(void)
4130 if (percpu_read(current_vcpu
))
4131 user_mode
= kvm_x86_ops
->get_cpl(percpu_read(current_vcpu
));
4133 return user_mode
!= 0;
4136 static unsigned long kvm_get_guest_ip(void)
4138 unsigned long ip
= 0;
4140 if (percpu_read(current_vcpu
))
4141 ip
= kvm_rip_read(percpu_read(current_vcpu
));
4146 static struct perf_guest_info_callbacks kvm_guest_cbs
= {
4147 .is_in_guest
= kvm_is_in_guest
,
4148 .is_user_mode
= kvm_is_user_mode
,
4149 .get_guest_ip
= kvm_get_guest_ip
,
4152 void kvm_before_handle_nmi(struct kvm_vcpu
*vcpu
)
4154 percpu_write(current_vcpu
, vcpu
);
4156 EXPORT_SYMBOL_GPL(kvm_before_handle_nmi
);
4158 void kvm_after_handle_nmi(struct kvm_vcpu
*vcpu
)
4160 percpu_write(current_vcpu
, NULL
);
4162 EXPORT_SYMBOL_GPL(kvm_after_handle_nmi
);
4164 int kvm_arch_init(void *opaque
)
4167 struct kvm_x86_ops
*ops
= (struct kvm_x86_ops
*)opaque
;
4170 printk(KERN_ERR
"kvm: already loaded the other module\n");
4175 if (!ops
->cpu_has_kvm_support()) {
4176 printk(KERN_ERR
"kvm: no hardware support\n");
4180 if (ops
->disabled_by_bios()) {
4181 printk(KERN_ERR
"kvm: disabled by bios\n");
4186 r
= kvm_mmu_module_init();
4190 kvm_init_msr_list();
4193 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
4194 kvm_mmu_set_base_ptes(PT_PRESENT_MASK
);
4195 kvm_mmu_set_mask_ptes(PT_USER_MASK
, PT_ACCESSED_MASK
,
4196 PT_DIRTY_MASK
, PT64_NX_MASK
, 0);
4200 perf_register_guest_info_callbacks(&kvm_guest_cbs
);
4203 host_xcr0
= xgetbv(XCR_XFEATURE_ENABLED_MASK
);
4211 void kvm_arch_exit(void)
4213 perf_unregister_guest_info_callbacks(&kvm_guest_cbs
);
4215 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC
))
4216 cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block
,
4217 CPUFREQ_TRANSITION_NOTIFIER
);
4219 kvm_mmu_module_exit();
4222 int kvm_emulate_halt(struct kvm_vcpu
*vcpu
)
4224 ++vcpu
->stat
.halt_exits
;
4225 if (irqchip_in_kernel(vcpu
->kvm
)) {
4226 vcpu
->arch
.mp_state
= KVM_MP_STATE_HALTED
;
4229 vcpu
->run
->exit_reason
= KVM_EXIT_HLT
;
4233 EXPORT_SYMBOL_GPL(kvm_emulate_halt
);
4235 static inline gpa_t
hc_gpa(struct kvm_vcpu
*vcpu
, unsigned long a0
,
4238 if (is_long_mode(vcpu
))
4241 return a0
| ((gpa_t
)a1
<< 32);
4244 int kvm_hv_hypercall(struct kvm_vcpu
*vcpu
)
4246 u64 param
, ingpa
, outgpa
, ret
;
4247 uint16_t code
, rep_idx
, rep_cnt
, res
= HV_STATUS_SUCCESS
, rep_done
= 0;
4248 bool fast
, longmode
;
4252 * hypercall generates UD from non zero cpl and real mode
4255 if (kvm_x86_ops
->get_cpl(vcpu
) != 0 || !is_protmode(vcpu
)) {
4256 kvm_queue_exception(vcpu
, UD_VECTOR
);
4260 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
4261 longmode
= is_long_mode(vcpu
) && cs_l
== 1;
4264 param
= ((u64
)kvm_register_read(vcpu
, VCPU_REGS_RDX
) << 32) |
4265 (kvm_register_read(vcpu
, VCPU_REGS_RAX
) & 0xffffffff);
4266 ingpa
= ((u64
)kvm_register_read(vcpu
, VCPU_REGS_RBX
) << 32) |
4267 (kvm_register_read(vcpu
, VCPU_REGS_RCX
) & 0xffffffff);
4268 outgpa
= ((u64
)kvm_register_read(vcpu
, VCPU_REGS_RDI
) << 32) |
4269 (kvm_register_read(vcpu
, VCPU_REGS_RSI
) & 0xffffffff);
4271 #ifdef CONFIG_X86_64
4273 param
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
4274 ingpa
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
4275 outgpa
= kvm_register_read(vcpu
, VCPU_REGS_R8
);
4279 code
= param
& 0xffff;
4280 fast
= (param
>> 16) & 0x1;
4281 rep_cnt
= (param
>> 32) & 0xfff;
4282 rep_idx
= (param
>> 48) & 0xfff;
4284 trace_kvm_hv_hypercall(code
, fast
, rep_cnt
, rep_idx
, ingpa
, outgpa
);
4287 case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT
:
4288 kvm_vcpu_on_spin(vcpu
);
4291 res
= HV_STATUS_INVALID_HYPERCALL_CODE
;
4295 ret
= res
| (((u64
)rep_done
& 0xfff) << 32);
4297 kvm_register_write(vcpu
, VCPU_REGS_RAX
, ret
);
4299 kvm_register_write(vcpu
, VCPU_REGS_RDX
, ret
>> 32);
4300 kvm_register_write(vcpu
, VCPU_REGS_RAX
, ret
& 0xffffffff);
4306 int kvm_emulate_hypercall(struct kvm_vcpu
*vcpu
)
4308 unsigned long nr
, a0
, a1
, a2
, a3
, ret
;
4311 if (kvm_hv_hypercall_enabled(vcpu
->kvm
))
4312 return kvm_hv_hypercall(vcpu
);
4314 nr
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
4315 a0
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
4316 a1
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
4317 a2
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
4318 a3
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
4320 trace_kvm_hypercall(nr
, a0
, a1
, a2
, a3
);
4322 if (!is_long_mode(vcpu
)) {
4330 if (kvm_x86_ops
->get_cpl(vcpu
) != 0) {
4336 case KVM_HC_VAPIC_POLL_IRQ
:
4340 r
= kvm_pv_mmu_op(vcpu
, a0
, hc_gpa(vcpu
, a1
, a2
), &ret
);
4347 kvm_register_write(vcpu
, VCPU_REGS_RAX
, ret
);
4348 ++vcpu
->stat
.hypercalls
;
4351 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall
);
4353 int kvm_fix_hypercall(struct kvm_vcpu
*vcpu
)
4355 char instruction
[3];
4356 unsigned long rip
= kvm_rip_read(vcpu
);
4359 * Blow out the MMU to ensure that no other VCPU has an active mapping
4360 * to ensure that the updated hypercall appears atomically across all
4363 kvm_mmu_zap_all(vcpu
->kvm
);
4365 kvm_x86_ops
->patch_hypercall(vcpu
, instruction
);
4367 return emulator_write_emulated(rip
, instruction
, 3, NULL
, vcpu
);
4370 void realmode_lgdt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
4372 struct desc_ptr dt
= { limit
, base
};
4374 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
4377 void realmode_lidt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
4379 struct desc_ptr dt
= { limit
, base
};
4381 kvm_x86_ops
->set_idt(vcpu
, &dt
);
4384 static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu
*vcpu
, int i
)
4386 struct kvm_cpuid_entry2
*e
= &vcpu
->arch
.cpuid_entries
[i
];
4387 int j
, nent
= vcpu
->arch
.cpuid_nent
;
4389 e
->flags
&= ~KVM_CPUID_FLAG_STATE_READ_NEXT
;
4390 /* when no next entry is found, the current entry[i] is reselected */
4391 for (j
= i
+ 1; ; j
= (j
+ 1) % nent
) {
4392 struct kvm_cpuid_entry2
*ej
= &vcpu
->arch
.cpuid_entries
[j
];
4393 if (ej
->function
== e
->function
) {
4394 ej
->flags
|= KVM_CPUID_FLAG_STATE_READ_NEXT
;
4398 return 0; /* silence gcc, even though control never reaches here */
4401 /* find an entry with matching function, matching index (if needed), and that
4402 * should be read next (if it's stateful) */
4403 static int is_matching_cpuid_entry(struct kvm_cpuid_entry2
*e
,
4404 u32 function
, u32 index
)
4406 if (e
->function
!= function
)
4408 if ((e
->flags
& KVM_CPUID_FLAG_SIGNIFCANT_INDEX
) && e
->index
!= index
)
4410 if ((e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
) &&
4411 !(e
->flags
& KVM_CPUID_FLAG_STATE_READ_NEXT
))
4416 struct kvm_cpuid_entry2
*kvm_find_cpuid_entry(struct kvm_vcpu
*vcpu
,
4417 u32 function
, u32 index
)
4420 struct kvm_cpuid_entry2
*best
= NULL
;
4422 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
4423 struct kvm_cpuid_entry2
*e
;
4425 e
= &vcpu
->arch
.cpuid_entries
[i
];
4426 if (is_matching_cpuid_entry(e
, function
, index
)) {
4427 if (e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
)
4428 move_to_next_stateful_cpuid_entry(vcpu
, i
);
4433 * Both basic or both extended?
4435 if (((e
->function
^ function
) & 0x80000000) == 0)
4436 if (!best
|| e
->function
> best
->function
)
4441 EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry
);
4443 int cpuid_maxphyaddr(struct kvm_vcpu
*vcpu
)
4445 struct kvm_cpuid_entry2
*best
;
4447 best
= kvm_find_cpuid_entry(vcpu
, 0x80000000, 0);
4448 if (!best
|| best
->eax
< 0x80000008)
4450 best
= kvm_find_cpuid_entry(vcpu
, 0x80000008, 0);
4452 return best
->eax
& 0xff;
4457 void kvm_emulate_cpuid(struct kvm_vcpu
*vcpu
)
4459 u32 function
, index
;
4460 struct kvm_cpuid_entry2
*best
;
4462 function
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
4463 index
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
4464 kvm_register_write(vcpu
, VCPU_REGS_RAX
, 0);
4465 kvm_register_write(vcpu
, VCPU_REGS_RBX
, 0);
4466 kvm_register_write(vcpu
, VCPU_REGS_RCX
, 0);
4467 kvm_register_write(vcpu
, VCPU_REGS_RDX
, 0);
4468 best
= kvm_find_cpuid_entry(vcpu
, function
, index
);
4470 kvm_register_write(vcpu
, VCPU_REGS_RAX
, best
->eax
);
4471 kvm_register_write(vcpu
, VCPU_REGS_RBX
, best
->ebx
);
4472 kvm_register_write(vcpu
, VCPU_REGS_RCX
, best
->ecx
);
4473 kvm_register_write(vcpu
, VCPU_REGS_RDX
, best
->edx
);
4475 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
4476 trace_kvm_cpuid(function
,
4477 kvm_register_read(vcpu
, VCPU_REGS_RAX
),
4478 kvm_register_read(vcpu
, VCPU_REGS_RBX
),
4479 kvm_register_read(vcpu
, VCPU_REGS_RCX
),
4480 kvm_register_read(vcpu
, VCPU_REGS_RDX
));
4482 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid
);
4485 * Check if userspace requested an interrupt window, and that the
4486 * interrupt window is open.
4488 * No need to exit to userspace if we already have an interrupt queued.
4490 static int dm_request_for_irq_injection(struct kvm_vcpu
*vcpu
)
4492 return (!irqchip_in_kernel(vcpu
->kvm
) && !kvm_cpu_has_interrupt(vcpu
) &&
4493 vcpu
->run
->request_interrupt_window
&&
4494 kvm_arch_interrupt_allowed(vcpu
));
4497 static void post_kvm_run_save(struct kvm_vcpu
*vcpu
)
4499 struct kvm_run
*kvm_run
= vcpu
->run
;
4501 kvm_run
->if_flag
= (kvm_get_rflags(vcpu
) & X86_EFLAGS_IF
) != 0;
4502 kvm_run
->cr8
= kvm_get_cr8(vcpu
);
4503 kvm_run
->apic_base
= kvm_get_apic_base(vcpu
);
4504 if (irqchip_in_kernel(vcpu
->kvm
))
4505 kvm_run
->ready_for_interrupt_injection
= 1;
4507 kvm_run
->ready_for_interrupt_injection
=
4508 kvm_arch_interrupt_allowed(vcpu
) &&
4509 !kvm_cpu_has_interrupt(vcpu
) &&
4510 !kvm_event_needs_reinjection(vcpu
);
4513 static void vapic_enter(struct kvm_vcpu
*vcpu
)
4515 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
4518 if (!apic
|| !apic
->vapic_addr
)
4521 page
= gfn_to_page(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
4523 vcpu
->arch
.apic
->vapic_page
= page
;
4526 static void vapic_exit(struct kvm_vcpu
*vcpu
)
4528 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
4531 if (!apic
|| !apic
->vapic_addr
)
4534 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
4535 kvm_release_page_dirty(apic
->vapic_page
);
4536 mark_page_dirty(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
4537 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
4540 static void update_cr8_intercept(struct kvm_vcpu
*vcpu
)
4544 if (!kvm_x86_ops
->update_cr8_intercept
)
4547 if (!vcpu
->arch
.apic
)
4550 if (!vcpu
->arch
.apic
->vapic_addr
)
4551 max_irr
= kvm_lapic_find_highest_irr(vcpu
);
4558 tpr
= kvm_lapic_get_cr8(vcpu
);
4560 kvm_x86_ops
->update_cr8_intercept(vcpu
, tpr
, max_irr
);
4563 static void inject_pending_event(struct kvm_vcpu
*vcpu
)
4565 /* try to reinject previous events if any */
4566 if (vcpu
->arch
.exception
.pending
) {
4567 trace_kvm_inj_exception(vcpu
->arch
.exception
.nr
,
4568 vcpu
->arch
.exception
.has_error_code
,
4569 vcpu
->arch
.exception
.error_code
);
4570 kvm_x86_ops
->queue_exception(vcpu
, vcpu
->arch
.exception
.nr
,
4571 vcpu
->arch
.exception
.has_error_code
,
4572 vcpu
->arch
.exception
.error_code
,
4573 vcpu
->arch
.exception
.reinject
);
4577 if (vcpu
->arch
.nmi_injected
) {
4578 kvm_x86_ops
->set_nmi(vcpu
);
4582 if (vcpu
->arch
.interrupt
.pending
) {
4583 kvm_x86_ops
->set_irq(vcpu
);
4587 /* try to inject new event if pending */
4588 if (vcpu
->arch
.nmi_pending
) {
4589 if (kvm_x86_ops
->nmi_allowed(vcpu
)) {
4590 vcpu
->arch
.nmi_pending
= false;
4591 vcpu
->arch
.nmi_injected
= true;
4592 kvm_x86_ops
->set_nmi(vcpu
);
4594 } else if (kvm_cpu_has_interrupt(vcpu
)) {
4595 if (kvm_x86_ops
->interrupt_allowed(vcpu
)) {
4596 kvm_queue_interrupt(vcpu
, kvm_cpu_get_interrupt(vcpu
),
4598 kvm_x86_ops
->set_irq(vcpu
);
4603 static void kvm_load_guest_xcr0(struct kvm_vcpu
*vcpu
)
4605 if (kvm_read_cr4_bits(vcpu
, X86_CR4_OSXSAVE
) &&
4606 !vcpu
->guest_xcr0_loaded
) {
4607 /* kvm_set_xcr() also depends on this */
4608 xsetbv(XCR_XFEATURE_ENABLED_MASK
, vcpu
->arch
.xcr0
);
4609 vcpu
->guest_xcr0_loaded
= 1;
4613 static void kvm_put_guest_xcr0(struct kvm_vcpu
*vcpu
)
4615 if (vcpu
->guest_xcr0_loaded
) {
4616 if (vcpu
->arch
.xcr0
!= host_xcr0
)
4617 xsetbv(XCR_XFEATURE_ENABLED_MASK
, host_xcr0
);
4618 vcpu
->guest_xcr0_loaded
= 0;
4622 static int vcpu_enter_guest(struct kvm_vcpu
*vcpu
)
4625 bool req_int_win
= !irqchip_in_kernel(vcpu
->kvm
) &&
4626 vcpu
->run
->request_interrupt_window
;
4629 if (test_and_clear_bit(KVM_REQ_MMU_RELOAD
, &vcpu
->requests
))
4630 kvm_mmu_unload(vcpu
);
4632 r
= kvm_mmu_reload(vcpu
);
4636 if (vcpu
->requests
) {
4637 if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
))
4638 __kvm_migrate_timers(vcpu
);
4639 if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE
, &vcpu
->requests
))
4640 kvm_write_guest_time(vcpu
);
4641 if (test_and_clear_bit(KVM_REQ_MMU_SYNC
, &vcpu
->requests
))
4642 kvm_mmu_sync_roots(vcpu
);
4643 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH
, &vcpu
->requests
))
4644 kvm_x86_ops
->tlb_flush(vcpu
);
4645 if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS
,
4647 vcpu
->run
->exit_reason
= KVM_EXIT_TPR_ACCESS
;
4651 if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
)) {
4652 vcpu
->run
->exit_reason
= KVM_EXIT_SHUTDOWN
;
4656 if (test_and_clear_bit(KVM_REQ_DEACTIVATE_FPU
, &vcpu
->requests
)) {
4657 vcpu
->fpu_active
= 0;
4658 kvm_x86_ops
->fpu_deactivate(vcpu
);
4664 kvm_x86_ops
->prepare_guest_switch(vcpu
);
4665 if (vcpu
->fpu_active
)
4666 kvm_load_guest_fpu(vcpu
);
4667 kvm_load_guest_xcr0(vcpu
);
4669 atomic_set(&vcpu
->guest_mode
, 1);
4672 local_irq_disable();
4674 if (!atomic_read(&vcpu
->guest_mode
) || vcpu
->requests
4675 || need_resched() || signal_pending(current
)) {
4676 atomic_set(&vcpu
->guest_mode
, 0);
4684 inject_pending_event(vcpu
);
4686 /* enable NMI/IRQ window open exits if needed */
4687 if (vcpu
->arch
.nmi_pending
)
4688 kvm_x86_ops
->enable_nmi_window(vcpu
);
4689 else if (kvm_cpu_has_interrupt(vcpu
) || req_int_win
)
4690 kvm_x86_ops
->enable_irq_window(vcpu
);
4692 if (kvm_lapic_enabled(vcpu
)) {
4693 update_cr8_intercept(vcpu
);
4694 kvm_lapic_sync_to_vapic(vcpu
);
4697 srcu_read_unlock(&vcpu
->kvm
->srcu
, vcpu
->srcu_idx
);
4701 if (unlikely(vcpu
->arch
.switch_db_regs
)) {
4703 set_debugreg(vcpu
->arch
.eff_db
[0], 0);
4704 set_debugreg(vcpu
->arch
.eff_db
[1], 1);
4705 set_debugreg(vcpu
->arch
.eff_db
[2], 2);
4706 set_debugreg(vcpu
->arch
.eff_db
[3], 3);
4709 trace_kvm_entry(vcpu
->vcpu_id
);
4710 kvm_x86_ops
->run(vcpu
);
4713 * If the guest has used debug registers, at least dr7
4714 * will be disabled while returning to the host.
4715 * If we don't have active breakpoints in the host, we don't
4716 * care about the messed up debug address registers. But if
4717 * we have some of them active, restore the old state.
4719 if (hw_breakpoint_active())
4720 hw_breakpoint_restore();
4722 atomic_set(&vcpu
->guest_mode
, 0);
4729 * We must have an instruction between local_irq_enable() and
4730 * kvm_guest_exit(), so the timer interrupt isn't delayed by
4731 * the interrupt shadow. The stat.exits increment will do nicely.
4732 * But we need to prevent reordering, hence this barrier():
4740 vcpu
->srcu_idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
4743 * Profile KVM exit RIPs:
4745 if (unlikely(prof_on
== KVM_PROFILING
)) {
4746 unsigned long rip
= kvm_rip_read(vcpu
);
4747 profile_hit(KVM_PROFILING
, (void *)rip
);
4751 kvm_lapic_sync_from_vapic(vcpu
);
4753 r
= kvm_x86_ops
->handle_exit(vcpu
);
4759 static int __vcpu_run(struct kvm_vcpu
*vcpu
)
4762 struct kvm
*kvm
= vcpu
->kvm
;
4764 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
)) {
4765 pr_debug("vcpu %d received sipi with vector # %x\n",
4766 vcpu
->vcpu_id
, vcpu
->arch
.sipi_vector
);
4767 kvm_lapic_reset(vcpu
);
4768 r
= kvm_arch_vcpu_reset(vcpu
);
4771 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
4774 vcpu
->srcu_idx
= srcu_read_lock(&kvm
->srcu
);
4779 if (vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
)
4780 r
= vcpu_enter_guest(vcpu
);
4782 srcu_read_unlock(&kvm
->srcu
, vcpu
->srcu_idx
);
4783 kvm_vcpu_block(vcpu
);
4784 vcpu
->srcu_idx
= srcu_read_lock(&kvm
->srcu
);
4785 if (test_and_clear_bit(KVM_REQ_UNHALT
, &vcpu
->requests
))
4787 switch(vcpu
->arch
.mp_state
) {
4788 case KVM_MP_STATE_HALTED
:
4789 vcpu
->arch
.mp_state
=
4790 KVM_MP_STATE_RUNNABLE
;
4791 case KVM_MP_STATE_RUNNABLE
:
4793 case KVM_MP_STATE_SIPI_RECEIVED
:
4804 clear_bit(KVM_REQ_PENDING_TIMER
, &vcpu
->requests
);
4805 if (kvm_cpu_has_pending_timer(vcpu
))
4806 kvm_inject_pending_timer_irqs(vcpu
);
4808 if (dm_request_for_irq_injection(vcpu
)) {
4810 vcpu
->run
->exit_reason
= KVM_EXIT_INTR
;
4811 ++vcpu
->stat
.request_irq_exits
;
4813 if (signal_pending(current
)) {
4815 vcpu
->run
->exit_reason
= KVM_EXIT_INTR
;
4816 ++vcpu
->stat
.signal_exits
;
4818 if (need_resched()) {
4819 srcu_read_unlock(&kvm
->srcu
, vcpu
->srcu_idx
);
4821 vcpu
->srcu_idx
= srcu_read_lock(&kvm
->srcu
);
4825 srcu_read_unlock(&kvm
->srcu
, vcpu
->srcu_idx
);
4832 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
4837 if (vcpu
->sigset_active
)
4838 sigprocmask(SIG_SETMASK
, &vcpu
->sigset
, &sigsaved
);
4840 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_UNINITIALIZED
)) {
4841 kvm_vcpu_block(vcpu
);
4842 clear_bit(KVM_REQ_UNHALT
, &vcpu
->requests
);
4847 /* re-sync apic's tpr */
4848 if (!irqchip_in_kernel(vcpu
->kvm
))
4849 kvm_set_cr8(vcpu
, kvm_run
->cr8
);
4851 if (vcpu
->arch
.pio
.count
|| vcpu
->mmio_needed
||
4852 vcpu
->arch
.emulate_ctxt
.restart
) {
4853 if (vcpu
->mmio_needed
) {
4854 memcpy(vcpu
->mmio_data
, kvm_run
->mmio
.data
, 8);
4855 vcpu
->mmio_read_completed
= 1;
4856 vcpu
->mmio_needed
= 0;
4858 vcpu
->srcu_idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
4859 r
= emulate_instruction(vcpu
, 0, 0, EMULTYPE_NO_DECODE
);
4860 srcu_read_unlock(&vcpu
->kvm
->srcu
, vcpu
->srcu_idx
);
4861 if (r
!= EMULATE_DONE
) {
4866 if (kvm_run
->exit_reason
== KVM_EXIT_HYPERCALL
)
4867 kvm_register_write(vcpu
, VCPU_REGS_RAX
,
4868 kvm_run
->hypercall
.ret
);
4870 r
= __vcpu_run(vcpu
);
4873 post_kvm_run_save(vcpu
);
4874 if (vcpu
->sigset_active
)
4875 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
4880 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
4882 regs
->rax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
4883 regs
->rbx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
4884 regs
->rcx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
4885 regs
->rdx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
4886 regs
->rsi
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
4887 regs
->rdi
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
4888 regs
->rsp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
4889 regs
->rbp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
4890 #ifdef CONFIG_X86_64
4891 regs
->r8
= kvm_register_read(vcpu
, VCPU_REGS_R8
);
4892 regs
->r9
= kvm_register_read(vcpu
, VCPU_REGS_R9
);
4893 regs
->r10
= kvm_register_read(vcpu
, VCPU_REGS_R10
);
4894 regs
->r11
= kvm_register_read(vcpu
, VCPU_REGS_R11
);
4895 regs
->r12
= kvm_register_read(vcpu
, VCPU_REGS_R12
);
4896 regs
->r13
= kvm_register_read(vcpu
, VCPU_REGS_R13
);
4897 regs
->r14
= kvm_register_read(vcpu
, VCPU_REGS_R14
);
4898 regs
->r15
= kvm_register_read(vcpu
, VCPU_REGS_R15
);
4901 regs
->rip
= kvm_rip_read(vcpu
);
4902 regs
->rflags
= kvm_get_rflags(vcpu
);
4907 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
4909 kvm_register_write(vcpu
, VCPU_REGS_RAX
, regs
->rax
);
4910 kvm_register_write(vcpu
, VCPU_REGS_RBX
, regs
->rbx
);
4911 kvm_register_write(vcpu
, VCPU_REGS_RCX
, regs
->rcx
);
4912 kvm_register_write(vcpu
, VCPU_REGS_RDX
, regs
->rdx
);
4913 kvm_register_write(vcpu
, VCPU_REGS_RSI
, regs
->rsi
);
4914 kvm_register_write(vcpu
, VCPU_REGS_RDI
, regs
->rdi
);
4915 kvm_register_write(vcpu
, VCPU_REGS_RSP
, regs
->rsp
);
4916 kvm_register_write(vcpu
, VCPU_REGS_RBP
, regs
->rbp
);
4917 #ifdef CONFIG_X86_64
4918 kvm_register_write(vcpu
, VCPU_REGS_R8
, regs
->r8
);
4919 kvm_register_write(vcpu
, VCPU_REGS_R9
, regs
->r9
);
4920 kvm_register_write(vcpu
, VCPU_REGS_R10
, regs
->r10
);
4921 kvm_register_write(vcpu
, VCPU_REGS_R11
, regs
->r11
);
4922 kvm_register_write(vcpu
, VCPU_REGS_R12
, regs
->r12
);
4923 kvm_register_write(vcpu
, VCPU_REGS_R13
, regs
->r13
);
4924 kvm_register_write(vcpu
, VCPU_REGS_R14
, regs
->r14
);
4925 kvm_register_write(vcpu
, VCPU_REGS_R15
, regs
->r15
);
4928 kvm_rip_write(vcpu
, regs
->rip
);
4929 kvm_set_rflags(vcpu
, regs
->rflags
);
4931 vcpu
->arch
.exception
.pending
= false;
4936 void kvm_get_cs_db_l_bits(struct kvm_vcpu
*vcpu
, int *db
, int *l
)
4938 struct kvm_segment cs
;
4940 kvm_get_segment(vcpu
, &cs
, VCPU_SREG_CS
);
4944 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits
);
4946 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
4947 struct kvm_sregs
*sregs
)
4951 kvm_get_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
4952 kvm_get_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
4953 kvm_get_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
4954 kvm_get_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
4955 kvm_get_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
4956 kvm_get_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
4958 kvm_get_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
4959 kvm_get_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
4961 kvm_x86_ops
->get_idt(vcpu
, &dt
);
4962 sregs
->idt
.limit
= dt
.size
;
4963 sregs
->idt
.base
= dt
.address
;
4964 kvm_x86_ops
->get_gdt(vcpu
, &dt
);
4965 sregs
->gdt
.limit
= dt
.size
;
4966 sregs
->gdt
.base
= dt
.address
;
4968 sregs
->cr0
= kvm_read_cr0(vcpu
);
4969 sregs
->cr2
= vcpu
->arch
.cr2
;
4970 sregs
->cr3
= vcpu
->arch
.cr3
;
4971 sregs
->cr4
= kvm_read_cr4(vcpu
);
4972 sregs
->cr8
= kvm_get_cr8(vcpu
);
4973 sregs
->efer
= vcpu
->arch
.efer
;
4974 sregs
->apic_base
= kvm_get_apic_base(vcpu
);
4976 memset(sregs
->interrupt_bitmap
, 0, sizeof sregs
->interrupt_bitmap
);
4978 if (vcpu
->arch
.interrupt
.pending
&& !vcpu
->arch
.interrupt
.soft
)
4979 set_bit(vcpu
->arch
.interrupt
.nr
,
4980 (unsigned long *)sregs
->interrupt_bitmap
);
4985 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
4986 struct kvm_mp_state
*mp_state
)
4988 mp_state
->mp_state
= vcpu
->arch
.mp_state
;
4992 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
4993 struct kvm_mp_state
*mp_state
)
4995 vcpu
->arch
.mp_state
= mp_state
->mp_state
;
4999 int kvm_task_switch(struct kvm_vcpu
*vcpu
, u16 tss_selector
, int reason
,
5000 bool has_error_code
, u32 error_code
)
5002 struct decode_cache
*c
= &vcpu
->arch
.emulate_ctxt
.decode
;
5003 int cs_db
, cs_l
, ret
;
5004 cache_all_regs(vcpu
);
5006 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
5008 vcpu
->arch
.emulate_ctxt
.vcpu
= vcpu
;
5009 vcpu
->arch
.emulate_ctxt
.eflags
= kvm_x86_ops
->get_rflags(vcpu
);
5010 vcpu
->arch
.emulate_ctxt
.eip
= kvm_rip_read(vcpu
);
5011 vcpu
->arch
.emulate_ctxt
.mode
=
5012 (!is_protmode(vcpu
)) ? X86EMUL_MODE_REAL
:
5013 (vcpu
->arch
.emulate_ctxt
.eflags
& X86_EFLAGS_VM
)
5014 ? X86EMUL_MODE_VM86
: cs_l
5015 ? X86EMUL_MODE_PROT64
: cs_db
5016 ? X86EMUL_MODE_PROT32
: X86EMUL_MODE_PROT16
;
5017 memset(c
, 0, sizeof(struct decode_cache
));
5018 memcpy(c
->regs
, vcpu
->arch
.regs
, sizeof c
->regs
);
5020 ret
= emulator_task_switch(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
,
5021 tss_selector
, reason
, has_error_code
,
5025 return EMULATE_FAIL
;
5027 memcpy(vcpu
->arch
.regs
, c
->regs
, sizeof c
->regs
);
5028 kvm_rip_write(vcpu
, vcpu
->arch
.emulate_ctxt
.eip
);
5029 kvm_x86_ops
->set_rflags(vcpu
, vcpu
->arch
.emulate_ctxt
.eflags
);
5030 return EMULATE_DONE
;
5032 EXPORT_SYMBOL_GPL(kvm_task_switch
);
5034 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
5035 struct kvm_sregs
*sregs
)
5037 int mmu_reset_needed
= 0;
5038 int pending_vec
, max_bits
;
5041 dt
.size
= sregs
->idt
.limit
;
5042 dt
.address
= sregs
->idt
.base
;
5043 kvm_x86_ops
->set_idt(vcpu
, &dt
);
5044 dt
.size
= sregs
->gdt
.limit
;
5045 dt
.address
= sregs
->gdt
.base
;
5046 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
5048 vcpu
->arch
.cr2
= sregs
->cr2
;
5049 mmu_reset_needed
|= vcpu
->arch
.cr3
!= sregs
->cr3
;
5050 vcpu
->arch
.cr3
= sregs
->cr3
;
5052 kvm_set_cr8(vcpu
, sregs
->cr8
);
5054 mmu_reset_needed
|= vcpu
->arch
.efer
!= sregs
->efer
;
5055 kvm_x86_ops
->set_efer(vcpu
, sregs
->efer
);
5056 kvm_set_apic_base(vcpu
, sregs
->apic_base
);
5058 mmu_reset_needed
|= kvm_read_cr0(vcpu
) != sregs
->cr0
;
5059 kvm_x86_ops
->set_cr0(vcpu
, sregs
->cr0
);
5060 vcpu
->arch
.cr0
= sregs
->cr0
;
5062 mmu_reset_needed
|= kvm_read_cr4(vcpu
) != sregs
->cr4
;
5063 kvm_x86_ops
->set_cr4(vcpu
, sregs
->cr4
);
5064 if (!is_long_mode(vcpu
) && is_pae(vcpu
)) {
5065 load_pdptrs(vcpu
, vcpu
->arch
.cr3
);
5066 mmu_reset_needed
= 1;
5069 if (mmu_reset_needed
)
5070 kvm_mmu_reset_context(vcpu
);
5072 max_bits
= (sizeof sregs
->interrupt_bitmap
) << 3;
5073 pending_vec
= find_first_bit(
5074 (const unsigned long *)sregs
->interrupt_bitmap
, max_bits
);
5075 if (pending_vec
< max_bits
) {
5076 kvm_queue_interrupt(vcpu
, pending_vec
, false);
5077 pr_debug("Set back pending irq %d\n", pending_vec
);
5078 if (irqchip_in_kernel(vcpu
->kvm
))
5079 kvm_pic_clear_isr_ack(vcpu
->kvm
);
5082 kvm_set_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
5083 kvm_set_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
5084 kvm_set_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
5085 kvm_set_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
5086 kvm_set_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
5087 kvm_set_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
5089 kvm_set_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
5090 kvm_set_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
5092 update_cr8_intercept(vcpu
);
5094 /* Older userspace won't unhalt the vcpu on reset. */
5095 if (kvm_vcpu_is_bsp(vcpu
) && kvm_rip_read(vcpu
) == 0xfff0 &&
5096 sregs
->cs
.selector
== 0xf000 && sregs
->cs
.base
== 0xffff0000 &&
5098 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
5103 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
5104 struct kvm_guest_debug
*dbg
)
5106 unsigned long rflags
;
5109 if (dbg
->control
& (KVM_GUESTDBG_INJECT_DB
| KVM_GUESTDBG_INJECT_BP
)) {
5111 if (vcpu
->arch
.exception
.pending
)
5113 if (dbg
->control
& KVM_GUESTDBG_INJECT_DB
)
5114 kvm_queue_exception(vcpu
, DB_VECTOR
);
5116 kvm_queue_exception(vcpu
, BP_VECTOR
);
5120 * Read rflags as long as potentially injected trace flags are still
5123 rflags
= kvm_get_rflags(vcpu
);
5125 vcpu
->guest_debug
= dbg
->control
;
5126 if (!(vcpu
->guest_debug
& KVM_GUESTDBG_ENABLE
))
5127 vcpu
->guest_debug
= 0;
5129 if (vcpu
->guest_debug
& KVM_GUESTDBG_USE_HW_BP
) {
5130 for (i
= 0; i
< KVM_NR_DB_REGS
; ++i
)
5131 vcpu
->arch
.eff_db
[i
] = dbg
->arch
.debugreg
[i
];
5132 vcpu
->arch
.switch_db_regs
=
5133 (dbg
->arch
.debugreg
[7] & DR7_BP_EN_MASK
);
5135 for (i
= 0; i
< KVM_NR_DB_REGS
; i
++)
5136 vcpu
->arch
.eff_db
[i
] = vcpu
->arch
.db
[i
];
5137 vcpu
->arch
.switch_db_regs
= (vcpu
->arch
.dr7
& DR7_BP_EN_MASK
);
5140 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
)
5141 vcpu
->arch
.singlestep_rip
= kvm_rip_read(vcpu
) +
5142 get_segment_base(vcpu
, VCPU_SREG_CS
);
5145 * Trigger an rflags update that will inject or remove the trace
5148 kvm_set_rflags(vcpu
, rflags
);
5150 kvm_x86_ops
->set_guest_debug(vcpu
, dbg
);
5160 * Translate a guest virtual address to a guest physical address.
5162 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
5163 struct kvm_translation
*tr
)
5165 unsigned long vaddr
= tr
->linear_address
;
5169 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
5170 gpa
= kvm_mmu_gva_to_gpa_system(vcpu
, vaddr
, NULL
);
5171 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
5172 tr
->physical_address
= gpa
;
5173 tr
->valid
= gpa
!= UNMAPPED_GVA
;
5180 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
5182 struct i387_fxsave_struct
*fxsave
=
5183 &vcpu
->arch
.guest_fpu
.state
->fxsave
;
5185 memcpy(fpu
->fpr
, fxsave
->st_space
, 128);
5186 fpu
->fcw
= fxsave
->cwd
;
5187 fpu
->fsw
= fxsave
->swd
;
5188 fpu
->ftwx
= fxsave
->twd
;
5189 fpu
->last_opcode
= fxsave
->fop
;
5190 fpu
->last_ip
= fxsave
->rip
;
5191 fpu
->last_dp
= fxsave
->rdp
;
5192 memcpy(fpu
->xmm
, fxsave
->xmm_space
, sizeof fxsave
->xmm_space
);
5197 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
5199 struct i387_fxsave_struct
*fxsave
=
5200 &vcpu
->arch
.guest_fpu
.state
->fxsave
;
5202 memcpy(fxsave
->st_space
, fpu
->fpr
, 128);
5203 fxsave
->cwd
= fpu
->fcw
;
5204 fxsave
->swd
= fpu
->fsw
;
5205 fxsave
->twd
= fpu
->ftwx
;
5206 fxsave
->fop
= fpu
->last_opcode
;
5207 fxsave
->rip
= fpu
->last_ip
;
5208 fxsave
->rdp
= fpu
->last_dp
;
5209 memcpy(fxsave
->xmm_space
, fpu
->xmm
, sizeof fxsave
->xmm_space
);
5214 int fx_init(struct kvm_vcpu
*vcpu
)
5218 err
= fpu_alloc(&vcpu
->arch
.guest_fpu
);
5222 fpu_finit(&vcpu
->arch
.guest_fpu
);
5225 * Ensure guest xcr0 is valid for loading
5227 vcpu
->arch
.xcr0
= XSTATE_FP
;
5229 vcpu
->arch
.cr0
|= X86_CR0_ET
;
5233 EXPORT_SYMBOL_GPL(fx_init
);
5235 static void fx_free(struct kvm_vcpu
*vcpu
)
5237 fpu_free(&vcpu
->arch
.guest_fpu
);
5240 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
)
5242 if (vcpu
->guest_fpu_loaded
)
5246 * Restore all possible states in the guest,
5247 * and assume host would use all available bits.
5248 * Guest xcr0 would be loaded later.
5250 kvm_put_guest_xcr0(vcpu
);
5251 vcpu
->guest_fpu_loaded
= 1;
5252 unlazy_fpu(current
);
5253 fpu_restore_checking(&vcpu
->arch
.guest_fpu
);
5257 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
)
5259 kvm_put_guest_xcr0(vcpu
);
5261 if (!vcpu
->guest_fpu_loaded
)
5264 vcpu
->guest_fpu_loaded
= 0;
5265 fpu_save_init(&vcpu
->arch
.guest_fpu
);
5266 ++vcpu
->stat
.fpu_reload
;
5267 set_bit(KVM_REQ_DEACTIVATE_FPU
, &vcpu
->requests
);
5271 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
)
5273 if (vcpu
->arch
.time_page
) {
5274 kvm_release_page_dirty(vcpu
->arch
.time_page
);
5275 vcpu
->arch
.time_page
= NULL
;
5279 kvm_x86_ops
->vcpu_free(vcpu
);
5282 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
,
5285 return kvm_x86_ops
->vcpu_create(kvm
, id
);
5288 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
)
5292 vcpu
->arch
.mtrr_state
.have_fixed
= 1;
5294 r
= kvm_arch_vcpu_reset(vcpu
);
5296 r
= kvm_mmu_setup(vcpu
);
5303 kvm_x86_ops
->vcpu_free(vcpu
);
5307 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
)
5310 kvm_mmu_unload(vcpu
);
5314 kvm_x86_ops
->vcpu_free(vcpu
);
5317 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
)
5319 vcpu
->arch
.nmi_pending
= false;
5320 vcpu
->arch
.nmi_injected
= false;
5322 vcpu
->arch
.switch_db_regs
= 0;
5323 memset(vcpu
->arch
.db
, 0, sizeof(vcpu
->arch
.db
));
5324 vcpu
->arch
.dr6
= DR6_FIXED_1
;
5325 vcpu
->arch
.dr7
= DR7_FIXED_1
;
5327 return kvm_x86_ops
->vcpu_reset(vcpu
);
5330 int kvm_arch_hardware_enable(void *garbage
)
5333 * Since this may be called from a hotplug notifcation,
5334 * we can't get the CPU frequency directly.
5336 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC
)) {
5337 int cpu
= raw_smp_processor_id();
5338 per_cpu(cpu_tsc_khz
, cpu
) = 0;
5341 kvm_shared_msr_cpu_online();
5343 return kvm_x86_ops
->hardware_enable(garbage
);
5346 void kvm_arch_hardware_disable(void *garbage
)
5348 kvm_x86_ops
->hardware_disable(garbage
);
5349 drop_user_return_notifiers(garbage
);
5352 int kvm_arch_hardware_setup(void)
5354 return kvm_x86_ops
->hardware_setup();
5357 void kvm_arch_hardware_unsetup(void)
5359 kvm_x86_ops
->hardware_unsetup();
5362 void kvm_arch_check_processor_compat(void *rtn
)
5364 kvm_x86_ops
->check_processor_compatibility(rtn
);
5367 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
)
5373 BUG_ON(vcpu
->kvm
== NULL
);
5376 vcpu
->arch
.mmu
.root_hpa
= INVALID_PAGE
;
5377 if (!irqchip_in_kernel(kvm
) || kvm_vcpu_is_bsp(vcpu
))
5378 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
5380 vcpu
->arch
.mp_state
= KVM_MP_STATE_UNINITIALIZED
;
5382 page
= alloc_page(GFP_KERNEL
| __GFP_ZERO
);
5387 vcpu
->arch
.pio_data
= page_address(page
);
5389 r
= kvm_mmu_create(vcpu
);
5391 goto fail_free_pio_data
;
5393 if (irqchip_in_kernel(kvm
)) {
5394 r
= kvm_create_lapic(vcpu
);
5396 goto fail_mmu_destroy
;
5399 vcpu
->arch
.mce_banks
= kzalloc(KVM_MAX_MCE_BANKS
* sizeof(u64
) * 4,
5401 if (!vcpu
->arch
.mce_banks
) {
5403 goto fail_free_lapic
;
5405 vcpu
->arch
.mcg_cap
= KVM_MAX_MCE_BANKS
;
5409 kvm_free_lapic(vcpu
);
5411 kvm_mmu_destroy(vcpu
);
5413 free_page((unsigned long)vcpu
->arch
.pio_data
);
5418 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
)
5422 kfree(vcpu
->arch
.mce_banks
);
5423 kvm_free_lapic(vcpu
);
5424 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
5425 kvm_mmu_destroy(vcpu
);
5426 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
5427 free_page((unsigned long)vcpu
->arch
.pio_data
);
5430 struct kvm
*kvm_arch_create_vm(void)
5432 struct kvm
*kvm
= kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
5435 return ERR_PTR(-ENOMEM
);
5437 kvm
->arch
.aliases
= kzalloc(sizeof(struct kvm_mem_aliases
), GFP_KERNEL
);
5438 if (!kvm
->arch
.aliases
) {
5440 return ERR_PTR(-ENOMEM
);
5443 INIT_LIST_HEAD(&kvm
->arch
.active_mmu_pages
);
5444 INIT_LIST_HEAD(&kvm
->arch
.assigned_dev_head
);
5446 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
5447 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID
, &kvm
->arch
.irq_sources_bitmap
);
5449 rdtscll(kvm
->arch
.vm_init_tsc
);
5454 static void kvm_unload_vcpu_mmu(struct kvm_vcpu
*vcpu
)
5457 kvm_mmu_unload(vcpu
);
5461 static void kvm_free_vcpus(struct kvm
*kvm
)
5464 struct kvm_vcpu
*vcpu
;
5467 * Unpin any mmu pages first.
5469 kvm_for_each_vcpu(i
, vcpu
, kvm
)
5470 kvm_unload_vcpu_mmu(vcpu
);
5471 kvm_for_each_vcpu(i
, vcpu
, kvm
)
5472 kvm_arch_vcpu_free(vcpu
);
5474 mutex_lock(&kvm
->lock
);
5475 for (i
= 0; i
< atomic_read(&kvm
->online_vcpus
); i
++)
5476 kvm
->vcpus
[i
] = NULL
;
5478 atomic_set(&kvm
->online_vcpus
, 0);
5479 mutex_unlock(&kvm
->lock
);
5482 void kvm_arch_sync_events(struct kvm
*kvm
)
5484 kvm_free_all_assigned_devices(kvm
);
5487 void kvm_arch_destroy_vm(struct kvm
*kvm
)
5489 kvm_iommu_unmap_guest(kvm
);
5491 kfree(kvm
->arch
.vpic
);
5492 kfree(kvm
->arch
.vioapic
);
5493 kvm_free_vcpus(kvm
);
5494 kvm_free_physmem(kvm
);
5495 if (kvm
->arch
.apic_access_page
)
5496 put_page(kvm
->arch
.apic_access_page
);
5497 if (kvm
->arch
.ept_identity_pagetable
)
5498 put_page(kvm
->arch
.ept_identity_pagetable
);
5499 cleanup_srcu_struct(&kvm
->srcu
);
5500 kfree(kvm
->arch
.aliases
);
5504 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
5505 struct kvm_memory_slot
*memslot
,
5506 struct kvm_memory_slot old
,
5507 struct kvm_userspace_memory_region
*mem
,
5510 int npages
= memslot
->npages
;
5512 /*To keep backward compatibility with older userspace,
5513 *x86 needs to hanlde !user_alloc case.
5516 if (npages
&& !old
.rmap
) {
5517 unsigned long userspace_addr
;
5519 down_write(¤t
->mm
->mmap_sem
);
5520 userspace_addr
= do_mmap(NULL
, 0,
5522 PROT_READ
| PROT_WRITE
,
5523 MAP_PRIVATE
| MAP_ANONYMOUS
,
5525 up_write(¤t
->mm
->mmap_sem
);
5527 if (IS_ERR((void *)userspace_addr
))
5528 return PTR_ERR((void *)userspace_addr
);
5530 memslot
->userspace_addr
= userspace_addr
;
5538 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
5539 struct kvm_userspace_memory_region
*mem
,
5540 struct kvm_memory_slot old
,
5544 int npages
= mem
->memory_size
>> PAGE_SHIFT
;
5546 if (!user_alloc
&& !old
.user_alloc
&& old
.rmap
&& !npages
) {
5549 down_write(¤t
->mm
->mmap_sem
);
5550 ret
= do_munmap(current
->mm
, old
.userspace_addr
,
5551 old
.npages
* PAGE_SIZE
);
5552 up_write(¤t
->mm
->mmap_sem
);
5555 "kvm_vm_ioctl_set_memory_region: "
5556 "failed to munmap memory\n");
5559 spin_lock(&kvm
->mmu_lock
);
5560 if (!kvm
->arch
.n_requested_mmu_pages
) {
5561 unsigned int nr_mmu_pages
= kvm_mmu_calculate_mmu_pages(kvm
);
5562 kvm_mmu_change_mmu_pages(kvm
, nr_mmu_pages
);
5565 kvm_mmu_slot_remove_write_access(kvm
, mem
->slot
);
5566 spin_unlock(&kvm
->mmu_lock
);
5569 void kvm_arch_flush_shadow(struct kvm
*kvm
)
5571 kvm_mmu_zap_all(kvm
);
5572 kvm_reload_remote_mmus(kvm
);
5575 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
)
5577 return vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
5578 || vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
5579 || vcpu
->arch
.nmi_pending
||
5580 (kvm_arch_interrupt_allowed(vcpu
) &&
5581 kvm_cpu_has_interrupt(vcpu
));
5584 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
)
5587 int cpu
= vcpu
->cpu
;
5589 if (waitqueue_active(&vcpu
->wq
)) {
5590 wake_up_interruptible(&vcpu
->wq
);
5591 ++vcpu
->stat
.halt_wakeup
;
5595 if (cpu
!= me
&& (unsigned)cpu
< nr_cpu_ids
&& cpu_online(cpu
))
5596 if (atomic_xchg(&vcpu
->guest_mode
, 0))
5597 smp_send_reschedule(cpu
);
5601 int kvm_arch_interrupt_allowed(struct kvm_vcpu
*vcpu
)
5603 return kvm_x86_ops
->interrupt_allowed(vcpu
);
5606 bool kvm_is_linear_rip(struct kvm_vcpu
*vcpu
, unsigned long linear_rip
)
5608 unsigned long current_rip
= kvm_rip_read(vcpu
) +
5609 get_segment_base(vcpu
, VCPU_SREG_CS
);
5611 return current_rip
== linear_rip
;
5613 EXPORT_SYMBOL_GPL(kvm_is_linear_rip
);
5615 unsigned long kvm_get_rflags(struct kvm_vcpu
*vcpu
)
5617 unsigned long rflags
;
5619 rflags
= kvm_x86_ops
->get_rflags(vcpu
);
5620 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
)
5621 rflags
&= ~X86_EFLAGS_TF
;
5624 EXPORT_SYMBOL_GPL(kvm_get_rflags
);
5626 void kvm_set_rflags(struct kvm_vcpu
*vcpu
, unsigned long rflags
)
5628 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
&&
5629 kvm_is_linear_rip(vcpu
, vcpu
->arch
.singlestep_rip
))
5630 rflags
|= X86_EFLAGS_TF
;
5631 kvm_x86_ops
->set_rflags(vcpu
, rflags
);
5633 EXPORT_SYMBOL_GPL(kvm_set_rflags
);
5635 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit
);
5636 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq
);
5637 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault
);
5638 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr
);
5639 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr
);
5640 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun
);
5641 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit
);
5642 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject
);
5643 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit
);
5644 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga
);
5645 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit
);
5646 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts
);