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
11 * Avi Kivity <avi@qumranet.com>
12 * Yaniv Kamay <yaniv@qumranet.com>
13 * Amit Shah <amit.shah@qumranet.com>
14 * Ben-Ami Yassour <benami@il.ibm.com>
16 * This work is licensed under the terms of the GNU GPL, version 2. See
17 * the COPYING file in the top-level directory.
21 #include <linux/kvm_host.h>
26 #include "kvm_cache_regs.h"
29 #include <linux/clocksource.h>
30 #include <linux/interrupt.h>
31 #include <linux/kvm.h>
33 #include <linux/vmalloc.h>
34 #include <linux/module.h>
35 #include <linux/mman.h>
36 #include <linux/highmem.h>
37 #include <linux/intel-iommu.h>
39 #include <asm/uaccess.h>
43 #define MAX_IO_MSRS 256
44 #define CR0_RESERVED_BITS \
45 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
46 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
47 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
48 #define CR4_RESERVED_BITS \
49 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
50 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
51 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
52 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
54 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
56 * - enable syscall per default because its emulated by KVM
57 * - enable LME and LMA per default on 64 bit KVM
60 static u64 __read_mostly efer_reserved_bits
= 0xfffffffffffffafeULL
;
62 static u64 __read_mostly efer_reserved_bits
= 0xfffffffffffffffeULL
;
65 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
66 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
68 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2
*cpuid
,
69 struct kvm_cpuid_entry2 __user
*entries
);
71 struct kvm_x86_ops
*kvm_x86_ops
;
72 EXPORT_SYMBOL_GPL(kvm_x86_ops
);
74 struct kvm_stats_debugfs_item debugfs_entries
[] = {
75 { "pf_fixed", VCPU_STAT(pf_fixed
) },
76 { "pf_guest", VCPU_STAT(pf_guest
) },
77 { "tlb_flush", VCPU_STAT(tlb_flush
) },
78 { "invlpg", VCPU_STAT(invlpg
) },
79 { "exits", VCPU_STAT(exits
) },
80 { "io_exits", VCPU_STAT(io_exits
) },
81 { "mmio_exits", VCPU_STAT(mmio_exits
) },
82 { "signal_exits", VCPU_STAT(signal_exits
) },
83 { "irq_window", VCPU_STAT(irq_window_exits
) },
84 { "nmi_window", VCPU_STAT(nmi_window_exits
) },
85 { "halt_exits", VCPU_STAT(halt_exits
) },
86 { "halt_wakeup", VCPU_STAT(halt_wakeup
) },
87 { "hypercalls", VCPU_STAT(hypercalls
) },
88 { "request_irq", VCPU_STAT(request_irq_exits
) },
89 { "irq_exits", VCPU_STAT(irq_exits
) },
90 { "host_state_reload", VCPU_STAT(host_state_reload
) },
91 { "efer_reload", VCPU_STAT(efer_reload
) },
92 { "fpu_reload", VCPU_STAT(fpu_reload
) },
93 { "insn_emulation", VCPU_STAT(insn_emulation
) },
94 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail
) },
95 { "irq_injections", VCPU_STAT(irq_injections
) },
96 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped
) },
97 { "mmu_pte_write", VM_STAT(mmu_pte_write
) },
98 { "mmu_pte_updated", VM_STAT(mmu_pte_updated
) },
99 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped
) },
100 { "mmu_flooded", VM_STAT(mmu_flooded
) },
101 { "mmu_recycled", VM_STAT(mmu_recycled
) },
102 { "mmu_cache_miss", VM_STAT(mmu_cache_miss
) },
103 { "mmu_unsync", VM_STAT(mmu_unsync
) },
104 { "remote_tlb_flush", VM_STAT(remote_tlb_flush
) },
105 { "largepages", VM_STAT(lpages
) },
109 unsigned long segment_base(u16 selector
)
111 struct descriptor_table gdt
;
112 struct desc_struct
*d
;
113 unsigned long table_base
;
119 asm("sgdt %0" : "=m"(gdt
));
120 table_base
= gdt
.base
;
122 if (selector
& 4) { /* from ldt */
125 asm("sldt %0" : "=g"(ldt_selector
));
126 table_base
= segment_base(ldt_selector
);
128 d
= (struct desc_struct
*)(table_base
+ (selector
& ~7));
129 v
= d
->base0
| ((unsigned long)d
->base1
<< 16) |
130 ((unsigned long)d
->base2
<< 24);
132 if (d
->s
== 0 && (d
->type
== 2 || d
->type
== 9 || d
->type
== 11))
133 v
|= ((unsigned long)((struct ldttss_desc64
*)d
)->base3
) << 32;
137 EXPORT_SYMBOL_GPL(segment_base
);
139 u64
kvm_get_apic_base(struct kvm_vcpu
*vcpu
)
141 if (irqchip_in_kernel(vcpu
->kvm
))
142 return vcpu
->arch
.apic_base
;
144 return vcpu
->arch
.apic_base
;
146 EXPORT_SYMBOL_GPL(kvm_get_apic_base
);
148 void kvm_set_apic_base(struct kvm_vcpu
*vcpu
, u64 data
)
150 /* TODO: reserve bits check */
151 if (irqchip_in_kernel(vcpu
->kvm
))
152 kvm_lapic_set_base(vcpu
, data
);
154 vcpu
->arch
.apic_base
= data
;
156 EXPORT_SYMBOL_GPL(kvm_set_apic_base
);
158 void kvm_queue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
)
160 WARN_ON(vcpu
->arch
.exception
.pending
);
161 vcpu
->arch
.exception
.pending
= true;
162 vcpu
->arch
.exception
.has_error_code
= false;
163 vcpu
->arch
.exception
.nr
= nr
;
165 EXPORT_SYMBOL_GPL(kvm_queue_exception
);
167 void kvm_inject_page_fault(struct kvm_vcpu
*vcpu
, unsigned long addr
,
170 ++vcpu
->stat
.pf_guest
;
171 if (vcpu
->arch
.exception
.pending
) {
172 if (vcpu
->arch
.exception
.nr
== PF_VECTOR
) {
173 printk(KERN_DEBUG
"kvm: inject_page_fault:"
174 " double fault 0x%lx\n", addr
);
175 vcpu
->arch
.exception
.nr
= DF_VECTOR
;
176 vcpu
->arch
.exception
.error_code
= 0;
177 } else if (vcpu
->arch
.exception
.nr
== DF_VECTOR
) {
178 /* triple fault -> shutdown */
179 set_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
);
183 vcpu
->arch
.cr2
= addr
;
184 kvm_queue_exception_e(vcpu
, PF_VECTOR
, error_code
);
187 void kvm_inject_nmi(struct kvm_vcpu
*vcpu
)
189 vcpu
->arch
.nmi_pending
= 1;
191 EXPORT_SYMBOL_GPL(kvm_inject_nmi
);
193 void kvm_queue_exception_e(struct kvm_vcpu
*vcpu
, unsigned nr
, u32 error_code
)
195 WARN_ON(vcpu
->arch
.exception
.pending
);
196 vcpu
->arch
.exception
.pending
= true;
197 vcpu
->arch
.exception
.has_error_code
= true;
198 vcpu
->arch
.exception
.nr
= nr
;
199 vcpu
->arch
.exception
.error_code
= error_code
;
201 EXPORT_SYMBOL_GPL(kvm_queue_exception_e
);
203 static void __queue_exception(struct kvm_vcpu
*vcpu
)
205 kvm_x86_ops
->queue_exception(vcpu
, vcpu
->arch
.exception
.nr
,
206 vcpu
->arch
.exception
.has_error_code
,
207 vcpu
->arch
.exception
.error_code
);
211 * Load the pae pdptrs. Return true is they are all valid.
213 int load_pdptrs(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
215 gfn_t pdpt_gfn
= cr3
>> PAGE_SHIFT
;
216 unsigned offset
= ((cr3
& (PAGE_SIZE
-1)) >> 5) << 2;
219 u64 pdpte
[ARRAY_SIZE(vcpu
->arch
.pdptrs
)];
221 ret
= kvm_read_guest_page(vcpu
->kvm
, pdpt_gfn
, pdpte
,
222 offset
* sizeof(u64
), sizeof(pdpte
));
227 for (i
= 0; i
< ARRAY_SIZE(pdpte
); ++i
) {
228 if ((pdpte
[i
] & 1) && (pdpte
[i
] & 0xfffffff0000001e6ull
)) {
235 memcpy(vcpu
->arch
.pdptrs
, pdpte
, sizeof(vcpu
->arch
.pdptrs
));
240 EXPORT_SYMBOL_GPL(load_pdptrs
);
242 static bool pdptrs_changed(struct kvm_vcpu
*vcpu
)
244 u64 pdpte
[ARRAY_SIZE(vcpu
->arch
.pdptrs
)];
248 if (is_long_mode(vcpu
) || !is_pae(vcpu
))
251 r
= kvm_read_guest(vcpu
->kvm
, vcpu
->arch
.cr3
& ~31u, pdpte
, sizeof(pdpte
));
254 changed
= memcmp(pdpte
, vcpu
->arch
.pdptrs
, sizeof(pdpte
)) != 0;
260 void kvm_set_cr0(struct kvm_vcpu
*vcpu
, unsigned long cr0
)
262 if (cr0
& CR0_RESERVED_BITS
) {
263 printk(KERN_DEBUG
"set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
264 cr0
, vcpu
->arch
.cr0
);
265 kvm_inject_gp(vcpu
, 0);
269 if ((cr0
& X86_CR0_NW
) && !(cr0
& X86_CR0_CD
)) {
270 printk(KERN_DEBUG
"set_cr0: #GP, CD == 0 && NW == 1\n");
271 kvm_inject_gp(vcpu
, 0);
275 if ((cr0
& X86_CR0_PG
) && !(cr0
& X86_CR0_PE
)) {
276 printk(KERN_DEBUG
"set_cr0: #GP, set PG flag "
277 "and a clear PE flag\n");
278 kvm_inject_gp(vcpu
, 0);
282 if (!is_paging(vcpu
) && (cr0
& X86_CR0_PG
)) {
284 if ((vcpu
->arch
.shadow_efer
& EFER_LME
)) {
288 printk(KERN_DEBUG
"set_cr0: #GP, start paging "
289 "in long mode while PAE is disabled\n");
290 kvm_inject_gp(vcpu
, 0);
293 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
295 printk(KERN_DEBUG
"set_cr0: #GP, start paging "
296 "in long mode while CS.L == 1\n");
297 kvm_inject_gp(vcpu
, 0);
303 if (is_pae(vcpu
) && !load_pdptrs(vcpu
, vcpu
->arch
.cr3
)) {
304 printk(KERN_DEBUG
"set_cr0: #GP, pdptrs "
306 kvm_inject_gp(vcpu
, 0);
312 kvm_x86_ops
->set_cr0(vcpu
, cr0
);
313 vcpu
->arch
.cr0
= cr0
;
315 kvm_mmu_reset_context(vcpu
);
318 EXPORT_SYMBOL_GPL(kvm_set_cr0
);
320 void kvm_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
)
322 kvm_set_cr0(vcpu
, (vcpu
->arch
.cr0
& ~0x0ful
) | (msw
& 0x0f));
323 KVMTRACE_1D(LMSW
, vcpu
,
324 (u32
)((vcpu
->arch
.cr0
& ~0x0ful
) | (msw
& 0x0f)),
327 EXPORT_SYMBOL_GPL(kvm_lmsw
);
329 void kvm_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
)
331 if (cr4
& CR4_RESERVED_BITS
) {
332 printk(KERN_DEBUG
"set_cr4: #GP, reserved bits\n");
333 kvm_inject_gp(vcpu
, 0);
337 if (is_long_mode(vcpu
)) {
338 if (!(cr4
& X86_CR4_PAE
)) {
339 printk(KERN_DEBUG
"set_cr4: #GP, clearing PAE while "
341 kvm_inject_gp(vcpu
, 0);
344 } else if (is_paging(vcpu
) && !is_pae(vcpu
) && (cr4
& X86_CR4_PAE
)
345 && !load_pdptrs(vcpu
, vcpu
->arch
.cr3
)) {
346 printk(KERN_DEBUG
"set_cr4: #GP, pdptrs reserved bits\n");
347 kvm_inject_gp(vcpu
, 0);
351 if (cr4
& X86_CR4_VMXE
) {
352 printk(KERN_DEBUG
"set_cr4: #GP, setting VMXE\n");
353 kvm_inject_gp(vcpu
, 0);
356 kvm_x86_ops
->set_cr4(vcpu
, cr4
);
357 vcpu
->arch
.cr4
= cr4
;
358 kvm_mmu_reset_context(vcpu
);
360 EXPORT_SYMBOL_GPL(kvm_set_cr4
);
362 void kvm_set_cr3(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
364 if (cr3
== vcpu
->arch
.cr3
&& !pdptrs_changed(vcpu
)) {
365 kvm_mmu_sync_roots(vcpu
);
366 kvm_mmu_flush_tlb(vcpu
);
370 if (is_long_mode(vcpu
)) {
371 if (cr3
& CR3_L_MODE_RESERVED_BITS
) {
372 printk(KERN_DEBUG
"set_cr3: #GP, reserved bits\n");
373 kvm_inject_gp(vcpu
, 0);
378 if (cr3
& CR3_PAE_RESERVED_BITS
) {
380 "set_cr3: #GP, reserved bits\n");
381 kvm_inject_gp(vcpu
, 0);
384 if (is_paging(vcpu
) && !load_pdptrs(vcpu
, cr3
)) {
385 printk(KERN_DEBUG
"set_cr3: #GP, pdptrs "
387 kvm_inject_gp(vcpu
, 0);
392 * We don't check reserved bits in nonpae mode, because
393 * this isn't enforced, and VMware depends on this.
398 * Does the new cr3 value map to physical memory? (Note, we
399 * catch an invalid cr3 even in real-mode, because it would
400 * cause trouble later on when we turn on paging anyway.)
402 * A real CPU would silently accept an invalid cr3 and would
403 * attempt to use it - with largely undefined (and often hard
404 * to debug) behavior on the guest side.
406 if (unlikely(!gfn_to_memslot(vcpu
->kvm
, cr3
>> PAGE_SHIFT
)))
407 kvm_inject_gp(vcpu
, 0);
409 vcpu
->arch
.cr3
= cr3
;
410 vcpu
->arch
.mmu
.new_cr3(vcpu
);
413 EXPORT_SYMBOL_GPL(kvm_set_cr3
);
415 void kvm_set_cr8(struct kvm_vcpu
*vcpu
, unsigned long cr8
)
417 if (cr8
& CR8_RESERVED_BITS
) {
418 printk(KERN_DEBUG
"set_cr8: #GP, reserved bits 0x%lx\n", cr8
);
419 kvm_inject_gp(vcpu
, 0);
422 if (irqchip_in_kernel(vcpu
->kvm
))
423 kvm_lapic_set_tpr(vcpu
, cr8
);
425 vcpu
->arch
.cr8
= cr8
;
427 EXPORT_SYMBOL_GPL(kvm_set_cr8
);
429 unsigned long kvm_get_cr8(struct kvm_vcpu
*vcpu
)
431 if (irqchip_in_kernel(vcpu
->kvm
))
432 return kvm_lapic_get_cr8(vcpu
);
434 return vcpu
->arch
.cr8
;
436 EXPORT_SYMBOL_GPL(kvm_get_cr8
);
439 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
440 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
442 * This list is modified at module load time to reflect the
443 * capabilities of the host cpu.
445 static u32 msrs_to_save
[] = {
446 MSR_IA32_SYSENTER_CS
, MSR_IA32_SYSENTER_ESP
, MSR_IA32_SYSENTER_EIP
,
449 MSR_CSTAR
, MSR_KERNEL_GS_BASE
, MSR_SYSCALL_MASK
, MSR_LSTAR
,
451 MSR_IA32_TIME_STAMP_COUNTER
, MSR_KVM_SYSTEM_TIME
, MSR_KVM_WALL_CLOCK
,
452 MSR_IA32_PERF_STATUS
,
455 static unsigned num_msrs_to_save
;
457 static u32 emulated_msrs
[] = {
458 MSR_IA32_MISC_ENABLE
,
461 static void set_efer(struct kvm_vcpu
*vcpu
, u64 efer
)
463 if (efer
& efer_reserved_bits
) {
464 printk(KERN_DEBUG
"set_efer: 0x%llx #GP, reserved bits\n",
466 kvm_inject_gp(vcpu
, 0);
471 && (vcpu
->arch
.shadow_efer
& EFER_LME
) != (efer
& EFER_LME
)) {
472 printk(KERN_DEBUG
"set_efer: #GP, change LME while paging\n");
473 kvm_inject_gp(vcpu
, 0);
477 kvm_x86_ops
->set_efer(vcpu
, efer
);
480 efer
|= vcpu
->arch
.shadow_efer
& EFER_LMA
;
482 vcpu
->arch
.shadow_efer
= efer
;
485 void kvm_enable_efer_bits(u64 mask
)
487 efer_reserved_bits
&= ~mask
;
489 EXPORT_SYMBOL_GPL(kvm_enable_efer_bits
);
493 * Writes msr value into into the appropriate "register".
494 * Returns 0 on success, non-0 otherwise.
495 * Assumes vcpu_load() was already called.
497 int kvm_set_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64 data
)
499 return kvm_x86_ops
->set_msr(vcpu
, msr_index
, data
);
503 * Adapt set_msr() to msr_io()'s calling convention
505 static int do_set_msr(struct kvm_vcpu
*vcpu
, unsigned index
, u64
*data
)
507 return kvm_set_msr(vcpu
, index
, *data
);
510 static void kvm_write_wall_clock(struct kvm
*kvm
, gpa_t wall_clock
)
513 struct pvclock_wall_clock wc
;
514 struct timespec now
, sys
, boot
;
521 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
524 * The guest calculates current wall clock time by adding
525 * system time (updated by kvm_write_guest_time below) to the
526 * wall clock specified here. guest system time equals host
527 * system time for us, thus we must fill in host boot time here.
529 now
= current_kernel_time();
531 boot
= ns_to_timespec(timespec_to_ns(&now
) - timespec_to_ns(&sys
));
533 wc
.sec
= boot
.tv_sec
;
534 wc
.nsec
= boot
.tv_nsec
;
535 wc
.version
= version
;
537 kvm_write_guest(kvm
, wall_clock
, &wc
, sizeof(wc
));
540 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
543 static uint32_t div_frac(uint32_t dividend
, uint32_t divisor
)
545 uint32_t quotient
, remainder
;
547 /* Don't try to replace with do_div(), this one calculates
548 * "(dividend << 32) / divisor" */
550 : "=a" (quotient
), "=d" (remainder
)
551 : "0" (0), "1" (dividend
), "r" (divisor
) );
555 static void kvm_set_time_scale(uint32_t tsc_khz
, struct pvclock_vcpu_time_info
*hv_clock
)
557 uint64_t nsecs
= 1000000000LL;
562 tps64
= tsc_khz
* 1000LL;
563 while (tps64
> nsecs
*2) {
568 tps32
= (uint32_t)tps64
;
569 while (tps32
<= (uint32_t)nsecs
) {
574 hv_clock
->tsc_shift
= shift
;
575 hv_clock
->tsc_to_system_mul
= div_frac(nsecs
, tps32
);
577 pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n",
578 __func__
, tsc_khz
, hv_clock
->tsc_shift
,
579 hv_clock
->tsc_to_system_mul
);
582 static void kvm_write_guest_time(struct kvm_vcpu
*v
)
586 struct kvm_vcpu_arch
*vcpu
= &v
->arch
;
589 if ((!vcpu
->time_page
))
592 if (unlikely(vcpu
->hv_clock_tsc_khz
!= tsc_khz
)) {
593 kvm_set_time_scale(tsc_khz
, &vcpu
->hv_clock
);
594 vcpu
->hv_clock_tsc_khz
= tsc_khz
;
597 /* Keep irq disabled to prevent changes to the clock */
598 local_irq_save(flags
);
599 kvm_get_msr(v
, MSR_IA32_TIME_STAMP_COUNTER
,
600 &vcpu
->hv_clock
.tsc_timestamp
);
602 local_irq_restore(flags
);
604 /* With all the info we got, fill in the values */
606 vcpu
->hv_clock
.system_time
= ts
.tv_nsec
+
607 (NSEC_PER_SEC
* (u64
)ts
.tv_sec
);
609 * The interface expects us to write an even number signaling that the
610 * update is finished. Since the guest won't see the intermediate
611 * state, we just increase by 2 at the end.
613 vcpu
->hv_clock
.version
+= 2;
615 shared_kaddr
= kmap_atomic(vcpu
->time_page
, KM_USER0
);
617 memcpy(shared_kaddr
+ vcpu
->time_offset
, &vcpu
->hv_clock
,
618 sizeof(vcpu
->hv_clock
));
620 kunmap_atomic(shared_kaddr
, KM_USER0
);
622 mark_page_dirty(v
->kvm
, vcpu
->time
>> PAGE_SHIFT
);
625 static bool msr_mtrr_valid(unsigned msr
)
628 case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR
- 1:
629 case MSR_MTRRfix64K_00000
:
630 case MSR_MTRRfix16K_80000
:
631 case MSR_MTRRfix16K_A0000
:
632 case MSR_MTRRfix4K_C0000
:
633 case MSR_MTRRfix4K_C8000
:
634 case MSR_MTRRfix4K_D0000
:
635 case MSR_MTRRfix4K_D8000
:
636 case MSR_MTRRfix4K_E0000
:
637 case MSR_MTRRfix4K_E8000
:
638 case MSR_MTRRfix4K_F0000
:
639 case MSR_MTRRfix4K_F8000
:
640 case MSR_MTRRdefType
:
641 case MSR_IA32_CR_PAT
:
649 static int set_msr_mtrr(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
651 if (!msr_mtrr_valid(msr
))
654 vcpu
->arch
.mtrr
[msr
- 0x200] = data
;
658 int kvm_set_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
662 set_efer(vcpu
, data
);
664 case MSR_IA32_MC0_STATUS
:
665 pr_unimpl(vcpu
, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
668 case MSR_IA32_MCG_STATUS
:
669 pr_unimpl(vcpu
, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
672 case MSR_IA32_MCG_CTL
:
673 pr_unimpl(vcpu
, "%s: MSR_IA32_MCG_CTL 0x%llx, nop\n",
676 case MSR_IA32_DEBUGCTLMSR
:
678 /* We support the non-activated case already */
680 } else if (data
& ~(DEBUGCTLMSR_LBR
| DEBUGCTLMSR_BTF
)) {
681 /* Values other than LBR and BTF are vendor-specific,
682 thus reserved and should throw a #GP */
685 pr_unimpl(vcpu
, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
688 case MSR_IA32_UCODE_REV
:
689 case MSR_IA32_UCODE_WRITE
:
691 case 0x200 ... 0x2ff:
692 return set_msr_mtrr(vcpu
, msr
, data
);
693 case MSR_IA32_APICBASE
:
694 kvm_set_apic_base(vcpu
, data
);
696 case MSR_IA32_MISC_ENABLE
:
697 vcpu
->arch
.ia32_misc_enable_msr
= data
;
699 case MSR_KVM_WALL_CLOCK
:
700 vcpu
->kvm
->arch
.wall_clock
= data
;
701 kvm_write_wall_clock(vcpu
->kvm
, data
);
703 case MSR_KVM_SYSTEM_TIME
: {
704 if (vcpu
->arch
.time_page
) {
705 kvm_release_page_dirty(vcpu
->arch
.time_page
);
706 vcpu
->arch
.time_page
= NULL
;
709 vcpu
->arch
.time
= data
;
711 /* we verify if the enable bit is set... */
715 /* ...but clean it before doing the actual write */
716 vcpu
->arch
.time_offset
= data
& ~(PAGE_MASK
| 1);
718 vcpu
->arch
.time_page
=
719 gfn_to_page(vcpu
->kvm
, data
>> PAGE_SHIFT
);
721 if (is_error_page(vcpu
->arch
.time_page
)) {
722 kvm_release_page_clean(vcpu
->arch
.time_page
);
723 vcpu
->arch
.time_page
= NULL
;
726 kvm_write_guest_time(vcpu
);
730 pr_unimpl(vcpu
, "unhandled wrmsr: 0x%x data %llx\n", msr
, data
);
735 EXPORT_SYMBOL_GPL(kvm_set_msr_common
);
739 * Reads an msr value (of 'msr_index') into 'pdata'.
740 * Returns 0 on success, non-0 otherwise.
741 * Assumes vcpu_load() was already called.
743 int kvm_get_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64
*pdata
)
745 return kvm_x86_ops
->get_msr(vcpu
, msr_index
, pdata
);
748 static int get_msr_mtrr(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
750 if (!msr_mtrr_valid(msr
))
753 *pdata
= vcpu
->arch
.mtrr
[msr
- 0x200];
757 int kvm_get_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
762 case 0xc0010010: /* SYSCFG */
763 case 0xc0010015: /* HWCR */
764 case MSR_IA32_PLATFORM_ID
:
765 case MSR_IA32_P5_MC_ADDR
:
766 case MSR_IA32_P5_MC_TYPE
:
767 case MSR_IA32_MC0_CTL
:
768 case MSR_IA32_MCG_STATUS
:
769 case MSR_IA32_MCG_CAP
:
770 case MSR_IA32_MCG_CTL
:
771 case MSR_IA32_MC0_MISC
:
772 case MSR_IA32_MC0_MISC
+4:
773 case MSR_IA32_MC0_MISC
+8:
774 case MSR_IA32_MC0_MISC
+12:
775 case MSR_IA32_MC0_MISC
+16:
776 case MSR_IA32_MC0_MISC
+20:
777 case MSR_IA32_UCODE_REV
:
778 case MSR_IA32_EBL_CR_POWERON
:
779 case MSR_IA32_DEBUGCTLMSR
:
780 case MSR_IA32_LASTBRANCHFROMIP
:
781 case MSR_IA32_LASTBRANCHTOIP
:
782 case MSR_IA32_LASTINTFROMIP
:
783 case MSR_IA32_LASTINTTOIP
:
787 data
= 0x500 | KVM_NR_VAR_MTRR
;
789 case 0x200 ... 0x2ff:
790 return get_msr_mtrr(vcpu
, msr
, pdata
);
791 case 0xcd: /* fsb frequency */
794 case MSR_IA32_APICBASE
:
795 data
= kvm_get_apic_base(vcpu
);
797 case MSR_IA32_MISC_ENABLE
:
798 data
= vcpu
->arch
.ia32_misc_enable_msr
;
800 case MSR_IA32_PERF_STATUS
:
801 /* TSC increment by tick */
804 data
|= (((uint64_t)4ULL) << 40);
807 data
= vcpu
->arch
.shadow_efer
;
809 case MSR_KVM_WALL_CLOCK
:
810 data
= vcpu
->kvm
->arch
.wall_clock
;
812 case MSR_KVM_SYSTEM_TIME
:
813 data
= vcpu
->arch
.time
;
816 pr_unimpl(vcpu
, "unhandled rdmsr: 0x%x\n", msr
);
822 EXPORT_SYMBOL_GPL(kvm_get_msr_common
);
825 * Read or write a bunch of msrs. All parameters are kernel addresses.
827 * @return number of msrs set successfully.
829 static int __msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs
*msrs
,
830 struct kvm_msr_entry
*entries
,
831 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
832 unsigned index
, u64
*data
))
838 down_read(&vcpu
->kvm
->slots_lock
);
839 for (i
= 0; i
< msrs
->nmsrs
; ++i
)
840 if (do_msr(vcpu
, entries
[i
].index
, &entries
[i
].data
))
842 up_read(&vcpu
->kvm
->slots_lock
);
850 * Read or write a bunch of msrs. Parameters are user addresses.
852 * @return number of msrs set successfully.
854 static int msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs __user
*user_msrs
,
855 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
856 unsigned index
, u64
*data
),
859 struct kvm_msrs msrs
;
860 struct kvm_msr_entry
*entries
;
865 if (copy_from_user(&msrs
, user_msrs
, sizeof msrs
))
869 if (msrs
.nmsrs
>= MAX_IO_MSRS
)
873 size
= sizeof(struct kvm_msr_entry
) * msrs
.nmsrs
;
874 entries
= vmalloc(size
);
879 if (copy_from_user(entries
, user_msrs
->entries
, size
))
882 r
= n
= __msr_io(vcpu
, &msrs
, entries
, do_msr
);
887 if (writeback
&& copy_to_user(user_msrs
->entries
, entries
, size
))
898 int kvm_dev_ioctl_check_extension(long ext
)
903 case KVM_CAP_IRQCHIP
:
905 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL
:
906 case KVM_CAP_USER_MEMORY
:
907 case KVM_CAP_SET_TSS_ADDR
:
908 case KVM_CAP_EXT_CPUID
:
909 case KVM_CAP_CLOCKSOURCE
:
911 case KVM_CAP_NOP_IO_DELAY
:
912 case KVM_CAP_MP_STATE
:
913 case KVM_CAP_SYNC_MMU
:
916 case KVM_CAP_COALESCED_MMIO
:
917 r
= KVM_COALESCED_MMIO_PAGE_OFFSET
;
920 r
= !kvm_x86_ops
->cpu_has_accelerated_tpr();
922 case KVM_CAP_NR_VCPUS
:
925 case KVM_CAP_NR_MEMSLOTS
:
926 r
= KVM_MEMORY_SLOTS
;
932 r
= intel_iommu_found();
942 long kvm_arch_dev_ioctl(struct file
*filp
,
943 unsigned int ioctl
, unsigned long arg
)
945 void __user
*argp
= (void __user
*)arg
;
949 case KVM_GET_MSR_INDEX_LIST
: {
950 struct kvm_msr_list __user
*user_msr_list
= argp
;
951 struct kvm_msr_list msr_list
;
955 if (copy_from_user(&msr_list
, user_msr_list
, sizeof msr_list
))
958 msr_list
.nmsrs
= num_msrs_to_save
+ ARRAY_SIZE(emulated_msrs
);
959 if (copy_to_user(user_msr_list
, &msr_list
, sizeof msr_list
))
962 if (n
< num_msrs_to_save
)
965 if (copy_to_user(user_msr_list
->indices
, &msrs_to_save
,
966 num_msrs_to_save
* sizeof(u32
)))
968 if (copy_to_user(user_msr_list
->indices
969 + num_msrs_to_save
* sizeof(u32
),
971 ARRAY_SIZE(emulated_msrs
) * sizeof(u32
)))
976 case KVM_GET_SUPPORTED_CPUID
: {
977 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
978 struct kvm_cpuid2 cpuid
;
981 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
983 r
= kvm_dev_ioctl_get_supported_cpuid(&cpuid
,
989 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
1001 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
1003 kvm_x86_ops
->vcpu_load(vcpu
, cpu
);
1004 kvm_write_guest_time(vcpu
);
1007 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
)
1009 kvm_x86_ops
->vcpu_put(vcpu
);
1010 kvm_put_guest_fpu(vcpu
);
1013 static int is_efer_nx(void)
1017 rdmsrl(MSR_EFER
, efer
);
1018 return efer
& EFER_NX
;
1021 static void cpuid_fix_nx_cap(struct kvm_vcpu
*vcpu
)
1024 struct kvm_cpuid_entry2
*e
, *entry
;
1027 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
1028 e
= &vcpu
->arch
.cpuid_entries
[i
];
1029 if (e
->function
== 0x80000001) {
1034 if (entry
&& (entry
->edx
& (1 << 20)) && !is_efer_nx()) {
1035 entry
->edx
&= ~(1 << 20);
1036 printk(KERN_INFO
"kvm: guest NX capability removed\n");
1040 /* when an old userspace process fills a new kernel module */
1041 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu
*vcpu
,
1042 struct kvm_cpuid
*cpuid
,
1043 struct kvm_cpuid_entry __user
*entries
)
1046 struct kvm_cpuid_entry
*cpuid_entries
;
1049 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
1052 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry
) * cpuid
->nent
);
1056 if (copy_from_user(cpuid_entries
, entries
,
1057 cpuid
->nent
* sizeof(struct kvm_cpuid_entry
)))
1059 for (i
= 0; i
< cpuid
->nent
; i
++) {
1060 vcpu
->arch
.cpuid_entries
[i
].function
= cpuid_entries
[i
].function
;
1061 vcpu
->arch
.cpuid_entries
[i
].eax
= cpuid_entries
[i
].eax
;
1062 vcpu
->arch
.cpuid_entries
[i
].ebx
= cpuid_entries
[i
].ebx
;
1063 vcpu
->arch
.cpuid_entries
[i
].ecx
= cpuid_entries
[i
].ecx
;
1064 vcpu
->arch
.cpuid_entries
[i
].edx
= cpuid_entries
[i
].edx
;
1065 vcpu
->arch
.cpuid_entries
[i
].index
= 0;
1066 vcpu
->arch
.cpuid_entries
[i
].flags
= 0;
1067 vcpu
->arch
.cpuid_entries
[i
].padding
[0] = 0;
1068 vcpu
->arch
.cpuid_entries
[i
].padding
[1] = 0;
1069 vcpu
->arch
.cpuid_entries
[i
].padding
[2] = 0;
1071 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
1072 cpuid_fix_nx_cap(vcpu
);
1076 vfree(cpuid_entries
);
1081 static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu
*vcpu
,
1082 struct kvm_cpuid2
*cpuid
,
1083 struct kvm_cpuid_entry2 __user
*entries
)
1088 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
1091 if (copy_from_user(&vcpu
->arch
.cpuid_entries
, entries
,
1092 cpuid
->nent
* sizeof(struct kvm_cpuid_entry2
)))
1094 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
1101 static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu
*vcpu
,
1102 struct kvm_cpuid2
*cpuid
,
1103 struct kvm_cpuid_entry2 __user
*entries
)
1108 if (cpuid
->nent
< vcpu
->arch
.cpuid_nent
)
1111 if (copy_to_user(entries
, &vcpu
->arch
.cpuid_entries
,
1112 vcpu
->arch
.cpuid_nent
* sizeof(struct kvm_cpuid_entry2
)))
1117 cpuid
->nent
= vcpu
->arch
.cpuid_nent
;
1121 static inline u32
bit(int bitno
)
1123 return 1 << (bitno
& 31);
1126 static void do_cpuid_1_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
1129 entry
->function
= function
;
1130 entry
->index
= index
;
1131 cpuid_count(entry
->function
, entry
->index
,
1132 &entry
->eax
, &entry
->ebx
, &entry
->ecx
, &entry
->edx
);
1136 static void do_cpuid_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
1137 u32 index
, int *nent
, int maxnent
)
1139 const u32 kvm_supported_word0_x86_features
= bit(X86_FEATURE_FPU
) |
1140 bit(X86_FEATURE_VME
) | bit(X86_FEATURE_DE
) |
1141 bit(X86_FEATURE_PSE
) | bit(X86_FEATURE_TSC
) |
1142 bit(X86_FEATURE_MSR
) | bit(X86_FEATURE_PAE
) |
1143 bit(X86_FEATURE_CX8
) | bit(X86_FEATURE_APIC
) |
1144 bit(X86_FEATURE_SEP
) | bit(X86_FEATURE_PGE
) |
1145 bit(X86_FEATURE_CMOV
) | bit(X86_FEATURE_PSE36
) |
1146 bit(X86_FEATURE_CLFLSH
) | bit(X86_FEATURE_MMX
) |
1147 bit(X86_FEATURE_FXSR
) | bit(X86_FEATURE_XMM
) |
1148 bit(X86_FEATURE_XMM2
) | bit(X86_FEATURE_SELFSNOOP
);
1149 const u32 kvm_supported_word1_x86_features
= bit(X86_FEATURE_FPU
) |
1150 bit(X86_FEATURE_VME
) | bit(X86_FEATURE_DE
) |
1151 bit(X86_FEATURE_PSE
) | bit(X86_FEATURE_TSC
) |
1152 bit(X86_FEATURE_MSR
) | bit(X86_FEATURE_PAE
) |
1153 bit(X86_FEATURE_CX8
) | bit(X86_FEATURE_APIC
) |
1154 bit(X86_FEATURE_PGE
) |
1155 bit(X86_FEATURE_CMOV
) | bit(X86_FEATURE_PSE36
) |
1156 bit(X86_FEATURE_MMX
) | bit(X86_FEATURE_FXSR
) |
1157 bit(X86_FEATURE_SYSCALL
) |
1158 (bit(X86_FEATURE_NX
) && is_efer_nx()) |
1159 #ifdef CONFIG_X86_64
1160 bit(X86_FEATURE_LM
) |
1162 bit(X86_FEATURE_MMXEXT
) |
1163 bit(X86_FEATURE_3DNOWEXT
) |
1164 bit(X86_FEATURE_3DNOW
);
1165 const u32 kvm_supported_word3_x86_features
=
1166 bit(X86_FEATURE_XMM3
) | bit(X86_FEATURE_CX16
);
1167 const u32 kvm_supported_word6_x86_features
=
1168 bit(X86_FEATURE_LAHF_LM
) | bit(X86_FEATURE_CMP_LEGACY
);
1170 /* all func 2 cpuid_count() should be called on the same cpu */
1172 do_cpuid_1_ent(entry
, function
, index
);
1177 entry
->eax
= min(entry
->eax
, (u32
)0xb);
1180 entry
->edx
&= kvm_supported_word0_x86_features
;
1181 entry
->ecx
&= kvm_supported_word3_x86_features
;
1183 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
1184 * may return different values. This forces us to get_cpu() before
1185 * issuing the first command, and also to emulate this annoying behavior
1186 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
1188 int t
, times
= entry
->eax
& 0xff;
1190 entry
->flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
1191 for (t
= 1; t
< times
&& *nent
< maxnent
; ++t
) {
1192 do_cpuid_1_ent(&entry
[t
], function
, 0);
1193 entry
[t
].flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
1198 /* function 4 and 0xb have additional index. */
1202 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1203 /* read more entries until cache_type is zero */
1204 for (i
= 1; *nent
< maxnent
; ++i
) {
1205 cache_type
= entry
[i
- 1].eax
& 0x1f;
1208 do_cpuid_1_ent(&entry
[i
], function
, i
);
1210 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1218 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1219 /* read more entries until level_type is zero */
1220 for (i
= 1; *nent
< maxnent
; ++i
) {
1221 level_type
= entry
[i
- 1].ecx
& 0xff;
1224 do_cpuid_1_ent(&entry
[i
], function
, i
);
1226 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1232 entry
->eax
= min(entry
->eax
, 0x8000001a);
1235 entry
->edx
&= kvm_supported_word1_x86_features
;
1236 entry
->ecx
&= kvm_supported_word6_x86_features
;
1242 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2
*cpuid
,
1243 struct kvm_cpuid_entry2 __user
*entries
)
1245 struct kvm_cpuid_entry2
*cpuid_entries
;
1246 int limit
, nent
= 0, r
= -E2BIG
;
1249 if (cpuid
->nent
< 1)
1252 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry2
) * cpuid
->nent
);
1256 do_cpuid_ent(&cpuid_entries
[0], 0, 0, &nent
, cpuid
->nent
);
1257 limit
= cpuid_entries
[0].eax
;
1258 for (func
= 1; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
1259 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
1260 &nent
, cpuid
->nent
);
1262 if (nent
>= cpuid
->nent
)
1265 do_cpuid_ent(&cpuid_entries
[nent
], 0x80000000, 0, &nent
, cpuid
->nent
);
1266 limit
= cpuid_entries
[nent
- 1].eax
;
1267 for (func
= 0x80000001; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
1268 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
1269 &nent
, cpuid
->nent
);
1271 if (copy_to_user(entries
, cpuid_entries
,
1272 nent
* sizeof(struct kvm_cpuid_entry2
)))
1278 vfree(cpuid_entries
);
1283 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu
*vcpu
,
1284 struct kvm_lapic_state
*s
)
1287 memcpy(s
->regs
, vcpu
->arch
.apic
->regs
, sizeof *s
);
1293 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu
*vcpu
,
1294 struct kvm_lapic_state
*s
)
1297 memcpy(vcpu
->arch
.apic
->regs
, s
->regs
, sizeof *s
);
1298 kvm_apic_post_state_restore(vcpu
);
1304 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu
*vcpu
,
1305 struct kvm_interrupt
*irq
)
1307 if (irq
->irq
< 0 || irq
->irq
>= 256)
1309 if (irqchip_in_kernel(vcpu
->kvm
))
1313 set_bit(irq
->irq
, vcpu
->arch
.irq_pending
);
1314 set_bit(irq
->irq
/ BITS_PER_LONG
, &vcpu
->arch
.irq_summary
);
1321 static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu
*vcpu
,
1322 struct kvm_tpr_access_ctl
*tac
)
1326 vcpu
->arch
.tpr_access_reporting
= !!tac
->enabled
;
1330 long kvm_arch_vcpu_ioctl(struct file
*filp
,
1331 unsigned int ioctl
, unsigned long arg
)
1333 struct kvm_vcpu
*vcpu
= filp
->private_data
;
1334 void __user
*argp
= (void __user
*)arg
;
1336 struct kvm_lapic_state
*lapic
= NULL
;
1339 case KVM_GET_LAPIC
: {
1340 lapic
= kzalloc(sizeof(struct kvm_lapic_state
), GFP_KERNEL
);
1345 r
= kvm_vcpu_ioctl_get_lapic(vcpu
, lapic
);
1349 if (copy_to_user(argp
, lapic
, sizeof(struct kvm_lapic_state
)))
1354 case KVM_SET_LAPIC
: {
1355 lapic
= kmalloc(sizeof(struct kvm_lapic_state
), GFP_KERNEL
);
1360 if (copy_from_user(lapic
, argp
, sizeof(struct kvm_lapic_state
)))
1362 r
= kvm_vcpu_ioctl_set_lapic(vcpu
, lapic
);
1368 case KVM_INTERRUPT
: {
1369 struct kvm_interrupt irq
;
1372 if (copy_from_user(&irq
, argp
, sizeof irq
))
1374 r
= kvm_vcpu_ioctl_interrupt(vcpu
, &irq
);
1380 case KVM_SET_CPUID
: {
1381 struct kvm_cpuid __user
*cpuid_arg
= argp
;
1382 struct kvm_cpuid cpuid
;
1385 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1387 r
= kvm_vcpu_ioctl_set_cpuid(vcpu
, &cpuid
, cpuid_arg
->entries
);
1392 case KVM_SET_CPUID2
: {
1393 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1394 struct kvm_cpuid2 cpuid
;
1397 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1399 r
= kvm_vcpu_ioctl_set_cpuid2(vcpu
, &cpuid
,
1400 cpuid_arg
->entries
);
1405 case KVM_GET_CPUID2
: {
1406 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1407 struct kvm_cpuid2 cpuid
;
1410 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1412 r
= kvm_vcpu_ioctl_get_cpuid2(vcpu
, &cpuid
,
1413 cpuid_arg
->entries
);
1417 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
1423 r
= msr_io(vcpu
, argp
, kvm_get_msr
, 1);
1426 r
= msr_io(vcpu
, argp
, do_set_msr
, 0);
1428 case KVM_TPR_ACCESS_REPORTING
: {
1429 struct kvm_tpr_access_ctl tac
;
1432 if (copy_from_user(&tac
, argp
, sizeof tac
))
1434 r
= vcpu_ioctl_tpr_access_reporting(vcpu
, &tac
);
1438 if (copy_to_user(argp
, &tac
, sizeof tac
))
1443 case KVM_SET_VAPIC_ADDR
: {
1444 struct kvm_vapic_addr va
;
1447 if (!irqchip_in_kernel(vcpu
->kvm
))
1450 if (copy_from_user(&va
, argp
, sizeof va
))
1453 kvm_lapic_set_vapic_addr(vcpu
, va
.vapic_addr
);
1465 static int kvm_vm_ioctl_set_tss_addr(struct kvm
*kvm
, unsigned long addr
)
1469 if (addr
> (unsigned int)(-3 * PAGE_SIZE
))
1471 ret
= kvm_x86_ops
->set_tss_addr(kvm
, addr
);
1475 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm
*kvm
,
1476 u32 kvm_nr_mmu_pages
)
1478 if (kvm_nr_mmu_pages
< KVM_MIN_ALLOC_MMU_PAGES
)
1481 down_write(&kvm
->slots_lock
);
1483 kvm_mmu_change_mmu_pages(kvm
, kvm_nr_mmu_pages
);
1484 kvm
->arch
.n_requested_mmu_pages
= kvm_nr_mmu_pages
;
1486 up_write(&kvm
->slots_lock
);
1490 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm
*kvm
)
1492 return kvm
->arch
.n_alloc_mmu_pages
;
1495 gfn_t
unalias_gfn(struct kvm
*kvm
, gfn_t gfn
)
1498 struct kvm_mem_alias
*alias
;
1500 for (i
= 0; i
< kvm
->arch
.naliases
; ++i
) {
1501 alias
= &kvm
->arch
.aliases
[i
];
1502 if (gfn
>= alias
->base_gfn
1503 && gfn
< alias
->base_gfn
+ alias
->npages
)
1504 return alias
->target_gfn
+ gfn
- alias
->base_gfn
;
1510 * Set a new alias region. Aliases map a portion of physical memory into
1511 * another portion. This is useful for memory windows, for example the PC
1514 static int kvm_vm_ioctl_set_memory_alias(struct kvm
*kvm
,
1515 struct kvm_memory_alias
*alias
)
1518 struct kvm_mem_alias
*p
;
1521 /* General sanity checks */
1522 if (alias
->memory_size
& (PAGE_SIZE
- 1))
1524 if (alias
->guest_phys_addr
& (PAGE_SIZE
- 1))
1526 if (alias
->slot
>= KVM_ALIAS_SLOTS
)
1528 if (alias
->guest_phys_addr
+ alias
->memory_size
1529 < alias
->guest_phys_addr
)
1531 if (alias
->target_phys_addr
+ alias
->memory_size
1532 < alias
->target_phys_addr
)
1535 down_write(&kvm
->slots_lock
);
1536 spin_lock(&kvm
->mmu_lock
);
1538 p
= &kvm
->arch
.aliases
[alias
->slot
];
1539 p
->base_gfn
= alias
->guest_phys_addr
>> PAGE_SHIFT
;
1540 p
->npages
= alias
->memory_size
>> PAGE_SHIFT
;
1541 p
->target_gfn
= alias
->target_phys_addr
>> PAGE_SHIFT
;
1543 for (n
= KVM_ALIAS_SLOTS
; n
> 0; --n
)
1544 if (kvm
->arch
.aliases
[n
- 1].npages
)
1546 kvm
->arch
.naliases
= n
;
1548 spin_unlock(&kvm
->mmu_lock
);
1549 kvm_mmu_zap_all(kvm
);
1551 up_write(&kvm
->slots_lock
);
1559 static int kvm_vm_ioctl_get_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
1564 switch (chip
->chip_id
) {
1565 case KVM_IRQCHIP_PIC_MASTER
:
1566 memcpy(&chip
->chip
.pic
,
1567 &pic_irqchip(kvm
)->pics
[0],
1568 sizeof(struct kvm_pic_state
));
1570 case KVM_IRQCHIP_PIC_SLAVE
:
1571 memcpy(&chip
->chip
.pic
,
1572 &pic_irqchip(kvm
)->pics
[1],
1573 sizeof(struct kvm_pic_state
));
1575 case KVM_IRQCHIP_IOAPIC
:
1576 memcpy(&chip
->chip
.ioapic
,
1577 ioapic_irqchip(kvm
),
1578 sizeof(struct kvm_ioapic_state
));
1587 static int kvm_vm_ioctl_set_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
1592 switch (chip
->chip_id
) {
1593 case KVM_IRQCHIP_PIC_MASTER
:
1594 memcpy(&pic_irqchip(kvm
)->pics
[0],
1596 sizeof(struct kvm_pic_state
));
1598 case KVM_IRQCHIP_PIC_SLAVE
:
1599 memcpy(&pic_irqchip(kvm
)->pics
[1],
1601 sizeof(struct kvm_pic_state
));
1603 case KVM_IRQCHIP_IOAPIC
:
1604 memcpy(ioapic_irqchip(kvm
),
1606 sizeof(struct kvm_ioapic_state
));
1612 kvm_pic_update_irq(pic_irqchip(kvm
));
1616 static int kvm_vm_ioctl_get_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
1620 memcpy(ps
, &kvm
->arch
.vpit
->pit_state
, sizeof(struct kvm_pit_state
));
1624 static int kvm_vm_ioctl_set_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
1628 memcpy(&kvm
->arch
.vpit
->pit_state
, ps
, sizeof(struct kvm_pit_state
));
1629 kvm_pit_load_count(kvm
, 0, ps
->channels
[0].count
);
1634 * Get (and clear) the dirty memory log for a memory slot.
1636 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
1637 struct kvm_dirty_log
*log
)
1641 struct kvm_memory_slot
*memslot
;
1644 down_write(&kvm
->slots_lock
);
1646 r
= kvm_get_dirty_log(kvm
, log
, &is_dirty
);
1650 /* If nothing is dirty, don't bother messing with page tables. */
1652 kvm_mmu_slot_remove_write_access(kvm
, log
->slot
);
1653 kvm_flush_remote_tlbs(kvm
);
1654 memslot
= &kvm
->memslots
[log
->slot
];
1655 n
= ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
1656 memset(memslot
->dirty_bitmap
, 0, n
);
1660 up_write(&kvm
->slots_lock
);
1664 long kvm_arch_vm_ioctl(struct file
*filp
,
1665 unsigned int ioctl
, unsigned long arg
)
1667 struct kvm
*kvm
= filp
->private_data
;
1668 void __user
*argp
= (void __user
*)arg
;
1671 * This union makes it completely explicit to gcc-3.x
1672 * that these two variables' stack usage should be
1673 * combined, not added together.
1676 struct kvm_pit_state ps
;
1677 struct kvm_memory_alias alias
;
1681 case KVM_SET_TSS_ADDR
:
1682 r
= kvm_vm_ioctl_set_tss_addr(kvm
, arg
);
1686 case KVM_SET_MEMORY_REGION
: {
1687 struct kvm_memory_region kvm_mem
;
1688 struct kvm_userspace_memory_region kvm_userspace_mem
;
1691 if (copy_from_user(&kvm_mem
, argp
, sizeof kvm_mem
))
1693 kvm_userspace_mem
.slot
= kvm_mem
.slot
;
1694 kvm_userspace_mem
.flags
= kvm_mem
.flags
;
1695 kvm_userspace_mem
.guest_phys_addr
= kvm_mem
.guest_phys_addr
;
1696 kvm_userspace_mem
.memory_size
= kvm_mem
.memory_size
;
1697 r
= kvm_vm_ioctl_set_memory_region(kvm
, &kvm_userspace_mem
, 0);
1702 case KVM_SET_NR_MMU_PAGES
:
1703 r
= kvm_vm_ioctl_set_nr_mmu_pages(kvm
, arg
);
1707 case KVM_GET_NR_MMU_PAGES
:
1708 r
= kvm_vm_ioctl_get_nr_mmu_pages(kvm
);
1710 case KVM_SET_MEMORY_ALIAS
:
1712 if (copy_from_user(&u
.alias
, argp
, sizeof(struct kvm_memory_alias
)))
1714 r
= kvm_vm_ioctl_set_memory_alias(kvm
, &u
.alias
);
1718 case KVM_CREATE_IRQCHIP
:
1720 kvm
->arch
.vpic
= kvm_create_pic(kvm
);
1721 if (kvm
->arch
.vpic
) {
1722 r
= kvm_ioapic_init(kvm
);
1724 kfree(kvm
->arch
.vpic
);
1725 kvm
->arch
.vpic
= NULL
;
1731 case KVM_CREATE_PIT
:
1733 kvm
->arch
.vpit
= kvm_create_pit(kvm
);
1737 case KVM_IRQ_LINE
: {
1738 struct kvm_irq_level irq_event
;
1741 if (copy_from_user(&irq_event
, argp
, sizeof irq_event
))
1743 if (irqchip_in_kernel(kvm
)) {
1744 mutex_lock(&kvm
->lock
);
1745 kvm_set_irq(kvm
, KVM_USERSPACE_IRQ_SOURCE_ID
,
1746 irq_event
.irq
, irq_event
.level
);
1747 mutex_unlock(&kvm
->lock
);
1752 case KVM_GET_IRQCHIP
: {
1753 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1754 struct kvm_irqchip
*chip
= kmalloc(sizeof(*chip
), GFP_KERNEL
);
1760 if (copy_from_user(chip
, argp
, sizeof *chip
))
1761 goto get_irqchip_out
;
1763 if (!irqchip_in_kernel(kvm
))
1764 goto get_irqchip_out
;
1765 r
= kvm_vm_ioctl_get_irqchip(kvm
, chip
);
1767 goto get_irqchip_out
;
1769 if (copy_to_user(argp
, chip
, sizeof *chip
))
1770 goto get_irqchip_out
;
1778 case KVM_SET_IRQCHIP
: {
1779 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1780 struct kvm_irqchip
*chip
= kmalloc(sizeof(*chip
), GFP_KERNEL
);
1786 if (copy_from_user(chip
, argp
, sizeof *chip
))
1787 goto set_irqchip_out
;
1789 if (!irqchip_in_kernel(kvm
))
1790 goto set_irqchip_out
;
1791 r
= kvm_vm_ioctl_set_irqchip(kvm
, chip
);
1793 goto set_irqchip_out
;
1803 if (copy_from_user(&u
.ps
, argp
, sizeof(struct kvm_pit_state
)))
1806 if (!kvm
->arch
.vpit
)
1808 r
= kvm_vm_ioctl_get_pit(kvm
, &u
.ps
);
1812 if (copy_to_user(argp
, &u
.ps
, sizeof(struct kvm_pit_state
)))
1819 if (copy_from_user(&u
.ps
, argp
, sizeof u
.ps
))
1822 if (!kvm
->arch
.vpit
)
1824 r
= kvm_vm_ioctl_set_pit(kvm
, &u
.ps
);
1837 static void kvm_init_msr_list(void)
1842 for (i
= j
= 0; i
< ARRAY_SIZE(msrs_to_save
); i
++) {
1843 if (rdmsr_safe(msrs_to_save
[i
], &dummy
[0], &dummy
[1]) < 0)
1846 msrs_to_save
[j
] = msrs_to_save
[i
];
1849 num_msrs_to_save
= j
;
1853 * Only apic need an MMIO device hook, so shortcut now..
1855 static struct kvm_io_device
*vcpu_find_pervcpu_dev(struct kvm_vcpu
*vcpu
,
1856 gpa_t addr
, int len
,
1859 struct kvm_io_device
*dev
;
1861 if (vcpu
->arch
.apic
) {
1862 dev
= &vcpu
->arch
.apic
->dev
;
1863 if (dev
->in_range(dev
, addr
, len
, is_write
))
1870 static struct kvm_io_device
*vcpu_find_mmio_dev(struct kvm_vcpu
*vcpu
,
1871 gpa_t addr
, int len
,
1874 struct kvm_io_device
*dev
;
1876 dev
= vcpu_find_pervcpu_dev(vcpu
, addr
, len
, is_write
);
1878 dev
= kvm_io_bus_find_dev(&vcpu
->kvm
->mmio_bus
, addr
, len
,
1883 int emulator_read_std(unsigned long addr
,
1886 struct kvm_vcpu
*vcpu
)
1889 int r
= X86EMUL_CONTINUE
;
1892 gpa_t gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
1893 unsigned offset
= addr
& (PAGE_SIZE
-1);
1894 unsigned tocopy
= min(bytes
, (unsigned)PAGE_SIZE
- offset
);
1897 if (gpa
== UNMAPPED_GVA
) {
1898 r
= X86EMUL_PROPAGATE_FAULT
;
1901 ret
= kvm_read_guest(vcpu
->kvm
, gpa
, data
, tocopy
);
1903 r
= X86EMUL_UNHANDLEABLE
;
1914 EXPORT_SYMBOL_GPL(emulator_read_std
);
1916 static int emulator_read_emulated(unsigned long addr
,
1919 struct kvm_vcpu
*vcpu
)
1921 struct kvm_io_device
*mmio_dev
;
1924 if (vcpu
->mmio_read_completed
) {
1925 memcpy(val
, vcpu
->mmio_data
, bytes
);
1926 vcpu
->mmio_read_completed
= 0;
1927 return X86EMUL_CONTINUE
;
1930 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
1932 /* For APIC access vmexit */
1933 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
1936 if (emulator_read_std(addr
, val
, bytes
, vcpu
)
1937 == X86EMUL_CONTINUE
)
1938 return X86EMUL_CONTINUE
;
1939 if (gpa
== UNMAPPED_GVA
)
1940 return X86EMUL_PROPAGATE_FAULT
;
1944 * Is this MMIO handled locally?
1946 mutex_lock(&vcpu
->kvm
->lock
);
1947 mmio_dev
= vcpu_find_mmio_dev(vcpu
, gpa
, bytes
, 0);
1949 kvm_iodevice_read(mmio_dev
, gpa
, bytes
, val
);
1950 mutex_unlock(&vcpu
->kvm
->lock
);
1951 return X86EMUL_CONTINUE
;
1953 mutex_unlock(&vcpu
->kvm
->lock
);
1955 vcpu
->mmio_needed
= 1;
1956 vcpu
->mmio_phys_addr
= gpa
;
1957 vcpu
->mmio_size
= bytes
;
1958 vcpu
->mmio_is_write
= 0;
1960 return X86EMUL_UNHANDLEABLE
;
1963 int emulator_write_phys(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
1964 const void *val
, int bytes
)
1968 ret
= kvm_write_guest(vcpu
->kvm
, gpa
, val
, bytes
);
1971 kvm_mmu_pte_write(vcpu
, gpa
, val
, bytes
);
1975 static int emulator_write_emulated_onepage(unsigned long addr
,
1978 struct kvm_vcpu
*vcpu
)
1980 struct kvm_io_device
*mmio_dev
;
1983 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
1985 if (gpa
== UNMAPPED_GVA
) {
1986 kvm_inject_page_fault(vcpu
, addr
, 2);
1987 return X86EMUL_PROPAGATE_FAULT
;
1990 /* For APIC access vmexit */
1991 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
1994 if (emulator_write_phys(vcpu
, gpa
, val
, bytes
))
1995 return X86EMUL_CONTINUE
;
1999 * Is this MMIO handled locally?
2001 mutex_lock(&vcpu
->kvm
->lock
);
2002 mmio_dev
= vcpu_find_mmio_dev(vcpu
, gpa
, bytes
, 1);
2004 kvm_iodevice_write(mmio_dev
, gpa
, bytes
, val
);
2005 mutex_unlock(&vcpu
->kvm
->lock
);
2006 return X86EMUL_CONTINUE
;
2008 mutex_unlock(&vcpu
->kvm
->lock
);
2010 vcpu
->mmio_needed
= 1;
2011 vcpu
->mmio_phys_addr
= gpa
;
2012 vcpu
->mmio_size
= bytes
;
2013 vcpu
->mmio_is_write
= 1;
2014 memcpy(vcpu
->mmio_data
, val
, bytes
);
2016 return X86EMUL_CONTINUE
;
2019 int emulator_write_emulated(unsigned long addr
,
2022 struct kvm_vcpu
*vcpu
)
2024 /* Crossing a page boundary? */
2025 if (((addr
+ bytes
- 1) ^ addr
) & PAGE_MASK
) {
2028 now
= -addr
& ~PAGE_MASK
;
2029 rc
= emulator_write_emulated_onepage(addr
, val
, now
, vcpu
);
2030 if (rc
!= X86EMUL_CONTINUE
)
2036 return emulator_write_emulated_onepage(addr
, val
, bytes
, vcpu
);
2038 EXPORT_SYMBOL_GPL(emulator_write_emulated
);
2040 static int emulator_cmpxchg_emulated(unsigned long addr
,
2044 struct kvm_vcpu
*vcpu
)
2046 static int reported
;
2050 printk(KERN_WARNING
"kvm: emulating exchange as write\n");
2052 #ifndef CONFIG_X86_64
2053 /* guests cmpxchg8b have to be emulated atomically */
2060 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2062 if (gpa
== UNMAPPED_GVA
||
2063 (gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
2066 if (((gpa
+ bytes
- 1) & PAGE_MASK
) != (gpa
& PAGE_MASK
))
2071 page
= gfn_to_page(vcpu
->kvm
, gpa
>> PAGE_SHIFT
);
2073 kaddr
= kmap_atomic(page
, KM_USER0
);
2074 set_64bit((u64
*)(kaddr
+ offset_in_page(gpa
)), val
);
2075 kunmap_atomic(kaddr
, KM_USER0
);
2076 kvm_release_page_dirty(page
);
2081 return emulator_write_emulated(addr
, new, bytes
, vcpu
);
2084 static unsigned long get_segment_base(struct kvm_vcpu
*vcpu
, int seg
)
2086 return kvm_x86_ops
->get_segment_base(vcpu
, seg
);
2089 int emulate_invlpg(struct kvm_vcpu
*vcpu
, gva_t address
)
2091 kvm_mmu_invlpg(vcpu
, address
);
2092 return X86EMUL_CONTINUE
;
2095 int emulate_clts(struct kvm_vcpu
*vcpu
)
2097 KVMTRACE_0D(CLTS
, vcpu
, handler
);
2098 kvm_x86_ops
->set_cr0(vcpu
, vcpu
->arch
.cr0
& ~X86_CR0_TS
);
2099 return X86EMUL_CONTINUE
;
2102 int emulator_get_dr(struct x86_emulate_ctxt
*ctxt
, int dr
, unsigned long *dest
)
2104 struct kvm_vcpu
*vcpu
= ctxt
->vcpu
;
2108 *dest
= kvm_x86_ops
->get_dr(vcpu
, dr
);
2109 return X86EMUL_CONTINUE
;
2111 pr_unimpl(vcpu
, "%s: unexpected dr %u\n", __func__
, dr
);
2112 return X86EMUL_UNHANDLEABLE
;
2116 int emulator_set_dr(struct x86_emulate_ctxt
*ctxt
, int dr
, unsigned long value
)
2118 unsigned long mask
= (ctxt
->mode
== X86EMUL_MODE_PROT64
) ? ~0ULL : ~0U;
2121 kvm_x86_ops
->set_dr(ctxt
->vcpu
, dr
, value
& mask
, &exception
);
2123 /* FIXME: better handling */
2124 return X86EMUL_UNHANDLEABLE
;
2126 return X86EMUL_CONTINUE
;
2129 void kvm_report_emulation_failure(struct kvm_vcpu
*vcpu
, const char *context
)
2132 unsigned long rip
= kvm_rip_read(vcpu
);
2133 unsigned long rip_linear
;
2135 if (!printk_ratelimit())
2138 rip_linear
= rip
+ get_segment_base(vcpu
, VCPU_SREG_CS
);
2140 emulator_read_std(rip_linear
, (void *)opcodes
, 4, vcpu
);
2142 printk(KERN_ERR
"emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
2143 context
, rip
, opcodes
[0], opcodes
[1], opcodes
[2], opcodes
[3]);
2145 EXPORT_SYMBOL_GPL(kvm_report_emulation_failure
);
2147 static struct x86_emulate_ops emulate_ops
= {
2148 .read_std
= emulator_read_std
,
2149 .read_emulated
= emulator_read_emulated
,
2150 .write_emulated
= emulator_write_emulated
,
2151 .cmpxchg_emulated
= emulator_cmpxchg_emulated
,
2154 static void cache_all_regs(struct kvm_vcpu
*vcpu
)
2156 kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2157 kvm_register_read(vcpu
, VCPU_REGS_RSP
);
2158 kvm_register_read(vcpu
, VCPU_REGS_RIP
);
2159 vcpu
->arch
.regs_dirty
= ~0;
2162 int emulate_instruction(struct kvm_vcpu
*vcpu
,
2163 struct kvm_run
*run
,
2169 struct decode_cache
*c
;
2171 kvm_clear_exception_queue(vcpu
);
2172 vcpu
->arch
.mmio_fault_cr2
= cr2
;
2174 * TODO: fix x86_emulate.c to use guest_read/write_register
2175 * instead of direct ->regs accesses, can save hundred cycles
2176 * on Intel for instructions that don't read/change RSP, for
2179 cache_all_regs(vcpu
);
2181 vcpu
->mmio_is_write
= 0;
2182 vcpu
->arch
.pio
.string
= 0;
2184 if (!(emulation_type
& EMULTYPE_NO_DECODE
)) {
2186 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
2188 vcpu
->arch
.emulate_ctxt
.vcpu
= vcpu
;
2189 vcpu
->arch
.emulate_ctxt
.eflags
= kvm_x86_ops
->get_rflags(vcpu
);
2190 vcpu
->arch
.emulate_ctxt
.mode
=
2191 (vcpu
->arch
.emulate_ctxt
.eflags
& X86_EFLAGS_VM
)
2192 ? X86EMUL_MODE_REAL
: cs_l
2193 ? X86EMUL_MODE_PROT64
: cs_db
2194 ? X86EMUL_MODE_PROT32
: X86EMUL_MODE_PROT16
;
2196 r
= x86_decode_insn(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
);
2198 /* Reject the instructions other than VMCALL/VMMCALL when
2199 * try to emulate invalid opcode */
2200 c
= &vcpu
->arch
.emulate_ctxt
.decode
;
2201 if ((emulation_type
& EMULTYPE_TRAP_UD
) &&
2202 (!(c
->twobyte
&& c
->b
== 0x01 &&
2203 (c
->modrm_reg
== 0 || c
->modrm_reg
== 3) &&
2204 c
->modrm_mod
== 3 && c
->modrm_rm
== 1)))
2205 return EMULATE_FAIL
;
2207 ++vcpu
->stat
.insn_emulation
;
2209 ++vcpu
->stat
.insn_emulation_fail
;
2210 if (kvm_mmu_unprotect_page_virt(vcpu
, cr2
))
2211 return EMULATE_DONE
;
2212 return EMULATE_FAIL
;
2216 r
= x86_emulate_insn(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
);
2218 if (vcpu
->arch
.pio
.string
)
2219 return EMULATE_DO_MMIO
;
2221 if ((r
|| vcpu
->mmio_is_write
) && run
) {
2222 run
->exit_reason
= KVM_EXIT_MMIO
;
2223 run
->mmio
.phys_addr
= vcpu
->mmio_phys_addr
;
2224 memcpy(run
->mmio
.data
, vcpu
->mmio_data
, 8);
2225 run
->mmio
.len
= vcpu
->mmio_size
;
2226 run
->mmio
.is_write
= vcpu
->mmio_is_write
;
2230 if (kvm_mmu_unprotect_page_virt(vcpu
, cr2
))
2231 return EMULATE_DONE
;
2232 if (!vcpu
->mmio_needed
) {
2233 kvm_report_emulation_failure(vcpu
, "mmio");
2234 return EMULATE_FAIL
;
2236 return EMULATE_DO_MMIO
;
2239 kvm_x86_ops
->set_rflags(vcpu
, vcpu
->arch
.emulate_ctxt
.eflags
);
2241 if (vcpu
->mmio_is_write
) {
2242 vcpu
->mmio_needed
= 0;
2243 return EMULATE_DO_MMIO
;
2246 return EMULATE_DONE
;
2248 EXPORT_SYMBOL_GPL(emulate_instruction
);
2250 static void free_pio_guest_pages(struct kvm_vcpu
*vcpu
)
2254 for (i
= 0; i
< ARRAY_SIZE(vcpu
->arch
.pio
.guest_pages
); ++i
)
2255 if (vcpu
->arch
.pio
.guest_pages
[i
]) {
2256 kvm_release_page_dirty(vcpu
->arch
.pio
.guest_pages
[i
]);
2257 vcpu
->arch
.pio
.guest_pages
[i
] = NULL
;
2261 static int pio_copy_data(struct kvm_vcpu
*vcpu
)
2263 void *p
= vcpu
->arch
.pio_data
;
2266 int nr_pages
= vcpu
->arch
.pio
.guest_pages
[1] ? 2 : 1;
2268 q
= vmap(vcpu
->arch
.pio
.guest_pages
, nr_pages
, VM_READ
|VM_WRITE
,
2271 free_pio_guest_pages(vcpu
);
2274 q
+= vcpu
->arch
.pio
.guest_page_offset
;
2275 bytes
= vcpu
->arch
.pio
.size
* vcpu
->arch
.pio
.cur_count
;
2276 if (vcpu
->arch
.pio
.in
)
2277 memcpy(q
, p
, bytes
);
2279 memcpy(p
, q
, bytes
);
2280 q
-= vcpu
->arch
.pio
.guest_page_offset
;
2282 free_pio_guest_pages(vcpu
);
2286 int complete_pio(struct kvm_vcpu
*vcpu
)
2288 struct kvm_pio_request
*io
= &vcpu
->arch
.pio
;
2295 val
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2296 memcpy(&val
, vcpu
->arch
.pio_data
, io
->size
);
2297 kvm_register_write(vcpu
, VCPU_REGS_RAX
, val
);
2301 r
= pio_copy_data(vcpu
);
2308 delta
*= io
->cur_count
;
2310 * The size of the register should really depend on
2311 * current address size.
2313 val
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
2315 kvm_register_write(vcpu
, VCPU_REGS_RCX
, val
);
2321 val
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
2323 kvm_register_write(vcpu
, VCPU_REGS_RDI
, val
);
2325 val
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
2327 kvm_register_write(vcpu
, VCPU_REGS_RSI
, val
);
2331 io
->count
-= io
->cur_count
;
2337 static void kernel_pio(struct kvm_io_device
*pio_dev
,
2338 struct kvm_vcpu
*vcpu
,
2341 /* TODO: String I/O for in kernel device */
2343 mutex_lock(&vcpu
->kvm
->lock
);
2344 if (vcpu
->arch
.pio
.in
)
2345 kvm_iodevice_read(pio_dev
, vcpu
->arch
.pio
.port
,
2346 vcpu
->arch
.pio
.size
,
2349 kvm_iodevice_write(pio_dev
, vcpu
->arch
.pio
.port
,
2350 vcpu
->arch
.pio
.size
,
2352 mutex_unlock(&vcpu
->kvm
->lock
);
2355 static void pio_string_write(struct kvm_io_device
*pio_dev
,
2356 struct kvm_vcpu
*vcpu
)
2358 struct kvm_pio_request
*io
= &vcpu
->arch
.pio
;
2359 void *pd
= vcpu
->arch
.pio_data
;
2362 mutex_lock(&vcpu
->kvm
->lock
);
2363 for (i
= 0; i
< io
->cur_count
; i
++) {
2364 kvm_iodevice_write(pio_dev
, io
->port
,
2369 mutex_unlock(&vcpu
->kvm
->lock
);
2372 static struct kvm_io_device
*vcpu_find_pio_dev(struct kvm_vcpu
*vcpu
,
2373 gpa_t addr
, int len
,
2376 return kvm_io_bus_find_dev(&vcpu
->kvm
->pio_bus
, addr
, len
, is_write
);
2379 int kvm_emulate_pio(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
, int in
,
2380 int size
, unsigned port
)
2382 struct kvm_io_device
*pio_dev
;
2385 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
2386 vcpu
->run
->io
.direction
= in
? KVM_EXIT_IO_IN
: KVM_EXIT_IO_OUT
;
2387 vcpu
->run
->io
.size
= vcpu
->arch
.pio
.size
= size
;
2388 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
2389 vcpu
->run
->io
.count
= vcpu
->arch
.pio
.count
= vcpu
->arch
.pio
.cur_count
= 1;
2390 vcpu
->run
->io
.port
= vcpu
->arch
.pio
.port
= port
;
2391 vcpu
->arch
.pio
.in
= in
;
2392 vcpu
->arch
.pio
.string
= 0;
2393 vcpu
->arch
.pio
.down
= 0;
2394 vcpu
->arch
.pio
.guest_page_offset
= 0;
2395 vcpu
->arch
.pio
.rep
= 0;
2397 if (vcpu
->run
->io
.direction
== KVM_EXIT_IO_IN
)
2398 KVMTRACE_2D(IO_READ
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2401 KVMTRACE_2D(IO_WRITE
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2404 val
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2405 memcpy(vcpu
->arch
.pio_data
, &val
, 4);
2407 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2409 pio_dev
= vcpu_find_pio_dev(vcpu
, port
, size
, !in
);
2411 kernel_pio(pio_dev
, vcpu
, vcpu
->arch
.pio_data
);
2417 EXPORT_SYMBOL_GPL(kvm_emulate_pio
);
2419 int kvm_emulate_pio_string(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
, int in
,
2420 int size
, unsigned long count
, int down
,
2421 gva_t address
, int rep
, unsigned port
)
2423 unsigned now
, in_page
;
2427 struct kvm_io_device
*pio_dev
;
2429 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
2430 vcpu
->run
->io
.direction
= in
? KVM_EXIT_IO_IN
: KVM_EXIT_IO_OUT
;
2431 vcpu
->run
->io
.size
= vcpu
->arch
.pio
.size
= size
;
2432 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
2433 vcpu
->run
->io
.count
= vcpu
->arch
.pio
.count
= vcpu
->arch
.pio
.cur_count
= count
;
2434 vcpu
->run
->io
.port
= vcpu
->arch
.pio
.port
= port
;
2435 vcpu
->arch
.pio
.in
= in
;
2436 vcpu
->arch
.pio
.string
= 1;
2437 vcpu
->arch
.pio
.down
= down
;
2438 vcpu
->arch
.pio
.guest_page_offset
= offset_in_page(address
);
2439 vcpu
->arch
.pio
.rep
= rep
;
2441 if (vcpu
->run
->io
.direction
== KVM_EXIT_IO_IN
)
2442 KVMTRACE_2D(IO_READ
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2445 KVMTRACE_2D(IO_WRITE
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2449 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2454 in_page
= PAGE_SIZE
- offset_in_page(address
);
2456 in_page
= offset_in_page(address
) + size
;
2457 now
= min(count
, (unsigned long)in_page
/ size
);
2460 * String I/O straddles page boundary. Pin two guest pages
2461 * so that we satisfy atomicity constraints. Do just one
2462 * transaction to avoid complexity.
2469 * String I/O in reverse. Yuck. Kill the guest, fix later.
2471 pr_unimpl(vcpu
, "guest string pio down\n");
2472 kvm_inject_gp(vcpu
, 0);
2475 vcpu
->run
->io
.count
= now
;
2476 vcpu
->arch
.pio
.cur_count
= now
;
2478 if (vcpu
->arch
.pio
.cur_count
== vcpu
->arch
.pio
.count
)
2479 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2481 for (i
= 0; i
< nr_pages
; ++i
) {
2482 page
= gva_to_page(vcpu
, address
+ i
* PAGE_SIZE
);
2483 vcpu
->arch
.pio
.guest_pages
[i
] = page
;
2485 kvm_inject_gp(vcpu
, 0);
2486 free_pio_guest_pages(vcpu
);
2491 pio_dev
= vcpu_find_pio_dev(vcpu
, port
,
2492 vcpu
->arch
.pio
.cur_count
,
2493 !vcpu
->arch
.pio
.in
);
2494 if (!vcpu
->arch
.pio
.in
) {
2495 /* string PIO write */
2496 ret
= pio_copy_data(vcpu
);
2497 if (ret
>= 0 && pio_dev
) {
2498 pio_string_write(pio_dev
, vcpu
);
2500 if (vcpu
->arch
.pio
.count
== 0)
2504 pr_unimpl(vcpu
, "no string pio read support yet, "
2505 "port %x size %d count %ld\n",
2510 EXPORT_SYMBOL_GPL(kvm_emulate_pio_string
);
2512 int kvm_arch_init(void *opaque
)
2515 struct kvm_x86_ops
*ops
= (struct kvm_x86_ops
*)opaque
;
2518 printk(KERN_ERR
"kvm: already loaded the other module\n");
2523 if (!ops
->cpu_has_kvm_support()) {
2524 printk(KERN_ERR
"kvm: no hardware support\n");
2528 if (ops
->disabled_by_bios()) {
2529 printk(KERN_ERR
"kvm: disabled by bios\n");
2534 r
= kvm_mmu_module_init();
2538 kvm_init_msr_list();
2541 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
2542 kvm_mmu_set_base_ptes(PT_PRESENT_MASK
);
2543 kvm_mmu_set_mask_ptes(PT_USER_MASK
, PT_ACCESSED_MASK
,
2544 PT_DIRTY_MASK
, PT64_NX_MASK
, 0);
2551 void kvm_arch_exit(void)
2554 kvm_mmu_module_exit();
2557 int kvm_emulate_halt(struct kvm_vcpu
*vcpu
)
2559 ++vcpu
->stat
.halt_exits
;
2560 KVMTRACE_0D(HLT
, vcpu
, handler
);
2561 if (irqchip_in_kernel(vcpu
->kvm
)) {
2562 vcpu
->arch
.mp_state
= KVM_MP_STATE_HALTED
;
2565 vcpu
->run
->exit_reason
= KVM_EXIT_HLT
;
2569 EXPORT_SYMBOL_GPL(kvm_emulate_halt
);
2571 static inline gpa_t
hc_gpa(struct kvm_vcpu
*vcpu
, unsigned long a0
,
2574 if (is_long_mode(vcpu
))
2577 return a0
| ((gpa_t
)a1
<< 32);
2580 int kvm_emulate_hypercall(struct kvm_vcpu
*vcpu
)
2582 unsigned long nr
, a0
, a1
, a2
, a3
, ret
;
2585 nr
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2586 a0
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
2587 a1
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
2588 a2
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
2589 a3
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
2591 KVMTRACE_1D(VMMCALL
, vcpu
, (u32
)nr
, handler
);
2593 if (!is_long_mode(vcpu
)) {
2602 case KVM_HC_VAPIC_POLL_IRQ
:
2606 r
= kvm_pv_mmu_op(vcpu
, a0
, hc_gpa(vcpu
, a1
, a2
), &ret
);
2612 kvm_register_write(vcpu
, VCPU_REGS_RAX
, ret
);
2613 ++vcpu
->stat
.hypercalls
;
2616 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall
);
2618 int kvm_fix_hypercall(struct kvm_vcpu
*vcpu
)
2620 char instruction
[3];
2622 unsigned long rip
= kvm_rip_read(vcpu
);
2626 * Blow out the MMU to ensure that no other VCPU has an active mapping
2627 * to ensure that the updated hypercall appears atomically across all
2630 kvm_mmu_zap_all(vcpu
->kvm
);
2632 kvm_x86_ops
->patch_hypercall(vcpu
, instruction
);
2633 if (emulator_write_emulated(rip
, instruction
, 3, vcpu
)
2634 != X86EMUL_CONTINUE
)
2640 static u64
mk_cr_64(u64 curr_cr
, u32 new_val
)
2642 return (curr_cr
& ~((1ULL << 32) - 1)) | new_val
;
2645 void realmode_lgdt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
2647 struct descriptor_table dt
= { limit
, base
};
2649 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
2652 void realmode_lidt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
2654 struct descriptor_table dt
= { limit
, base
};
2656 kvm_x86_ops
->set_idt(vcpu
, &dt
);
2659 void realmode_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
,
2660 unsigned long *rflags
)
2662 kvm_lmsw(vcpu
, msw
);
2663 *rflags
= kvm_x86_ops
->get_rflags(vcpu
);
2666 unsigned long realmode_get_cr(struct kvm_vcpu
*vcpu
, int cr
)
2668 unsigned long value
;
2670 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
2673 value
= vcpu
->arch
.cr0
;
2676 value
= vcpu
->arch
.cr2
;
2679 value
= vcpu
->arch
.cr3
;
2682 value
= vcpu
->arch
.cr4
;
2685 value
= kvm_get_cr8(vcpu
);
2688 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
2691 KVMTRACE_3D(CR_READ
, vcpu
, (u32
)cr
, (u32
)value
,
2692 (u32
)((u64
)value
>> 32), handler
);
2697 void realmode_set_cr(struct kvm_vcpu
*vcpu
, int cr
, unsigned long val
,
2698 unsigned long *rflags
)
2700 KVMTRACE_3D(CR_WRITE
, vcpu
, (u32
)cr
, (u32
)val
,
2701 (u32
)((u64
)val
>> 32), handler
);
2705 kvm_set_cr0(vcpu
, mk_cr_64(vcpu
->arch
.cr0
, val
));
2706 *rflags
= kvm_x86_ops
->get_rflags(vcpu
);
2709 vcpu
->arch
.cr2
= val
;
2712 kvm_set_cr3(vcpu
, val
);
2715 kvm_set_cr4(vcpu
, mk_cr_64(vcpu
->arch
.cr4
, val
));
2718 kvm_set_cr8(vcpu
, val
& 0xfUL
);
2721 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
2725 static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu
*vcpu
, int i
)
2727 struct kvm_cpuid_entry2
*e
= &vcpu
->arch
.cpuid_entries
[i
];
2728 int j
, nent
= vcpu
->arch
.cpuid_nent
;
2730 e
->flags
&= ~KVM_CPUID_FLAG_STATE_READ_NEXT
;
2731 /* when no next entry is found, the current entry[i] is reselected */
2732 for (j
= i
+ 1; j
== i
; j
= (j
+ 1) % nent
) {
2733 struct kvm_cpuid_entry2
*ej
= &vcpu
->arch
.cpuid_entries
[j
];
2734 if (ej
->function
== e
->function
) {
2735 ej
->flags
|= KVM_CPUID_FLAG_STATE_READ_NEXT
;
2739 return 0; /* silence gcc, even though control never reaches here */
2742 /* find an entry with matching function, matching index (if needed), and that
2743 * should be read next (if it's stateful) */
2744 static int is_matching_cpuid_entry(struct kvm_cpuid_entry2
*e
,
2745 u32 function
, u32 index
)
2747 if (e
->function
!= function
)
2749 if ((e
->flags
& KVM_CPUID_FLAG_SIGNIFCANT_INDEX
) && e
->index
!= index
)
2751 if ((e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
) &&
2752 !(e
->flags
& KVM_CPUID_FLAG_STATE_READ_NEXT
))
2757 void kvm_emulate_cpuid(struct kvm_vcpu
*vcpu
)
2760 u32 function
, index
;
2761 struct kvm_cpuid_entry2
*e
, *best
;
2763 function
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2764 index
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
2765 kvm_register_write(vcpu
, VCPU_REGS_RAX
, 0);
2766 kvm_register_write(vcpu
, VCPU_REGS_RBX
, 0);
2767 kvm_register_write(vcpu
, VCPU_REGS_RCX
, 0);
2768 kvm_register_write(vcpu
, VCPU_REGS_RDX
, 0);
2770 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
2771 e
= &vcpu
->arch
.cpuid_entries
[i
];
2772 if (is_matching_cpuid_entry(e
, function
, index
)) {
2773 if (e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
)
2774 move_to_next_stateful_cpuid_entry(vcpu
, i
);
2779 * Both basic or both extended?
2781 if (((e
->function
^ function
) & 0x80000000) == 0)
2782 if (!best
|| e
->function
> best
->function
)
2786 kvm_register_write(vcpu
, VCPU_REGS_RAX
, best
->eax
);
2787 kvm_register_write(vcpu
, VCPU_REGS_RBX
, best
->ebx
);
2788 kvm_register_write(vcpu
, VCPU_REGS_RCX
, best
->ecx
);
2789 kvm_register_write(vcpu
, VCPU_REGS_RDX
, best
->edx
);
2791 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2792 KVMTRACE_5D(CPUID
, vcpu
, function
,
2793 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RAX
),
2794 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RBX
),
2795 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RCX
),
2796 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RDX
), handler
);
2798 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid
);
2801 * Check if userspace requested an interrupt window, and that the
2802 * interrupt window is open.
2804 * No need to exit to userspace if we already have an interrupt queued.
2806 static int dm_request_for_irq_injection(struct kvm_vcpu
*vcpu
,
2807 struct kvm_run
*kvm_run
)
2809 return (!vcpu
->arch
.irq_summary
&&
2810 kvm_run
->request_interrupt_window
&&
2811 vcpu
->arch
.interrupt_window_open
&&
2812 (kvm_x86_ops
->get_rflags(vcpu
) & X86_EFLAGS_IF
));
2815 static void post_kvm_run_save(struct kvm_vcpu
*vcpu
,
2816 struct kvm_run
*kvm_run
)
2818 kvm_run
->if_flag
= (kvm_x86_ops
->get_rflags(vcpu
) & X86_EFLAGS_IF
) != 0;
2819 kvm_run
->cr8
= kvm_get_cr8(vcpu
);
2820 kvm_run
->apic_base
= kvm_get_apic_base(vcpu
);
2821 if (irqchip_in_kernel(vcpu
->kvm
))
2822 kvm_run
->ready_for_interrupt_injection
= 1;
2824 kvm_run
->ready_for_interrupt_injection
=
2825 (vcpu
->arch
.interrupt_window_open
&&
2826 vcpu
->arch
.irq_summary
== 0);
2829 static void vapic_enter(struct kvm_vcpu
*vcpu
)
2831 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
2834 if (!apic
|| !apic
->vapic_addr
)
2837 page
= gfn_to_page(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
2839 vcpu
->arch
.apic
->vapic_page
= page
;
2842 static void vapic_exit(struct kvm_vcpu
*vcpu
)
2844 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
2846 if (!apic
|| !apic
->vapic_addr
)
2849 down_read(&vcpu
->kvm
->slots_lock
);
2850 kvm_release_page_dirty(apic
->vapic_page
);
2851 mark_page_dirty(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
2852 up_read(&vcpu
->kvm
->slots_lock
);
2855 static int vcpu_enter_guest(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2860 if (test_and_clear_bit(KVM_REQ_MMU_RELOAD
, &vcpu
->requests
))
2861 kvm_mmu_unload(vcpu
);
2863 r
= kvm_mmu_reload(vcpu
);
2867 if (vcpu
->requests
) {
2868 if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
))
2869 __kvm_migrate_timers(vcpu
);
2870 if (test_and_clear_bit(KVM_REQ_MMU_SYNC
, &vcpu
->requests
))
2871 kvm_mmu_sync_roots(vcpu
);
2872 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH
, &vcpu
->requests
))
2873 kvm_x86_ops
->tlb_flush(vcpu
);
2874 if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS
,
2876 kvm_run
->exit_reason
= KVM_EXIT_TPR_ACCESS
;
2880 if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
)) {
2881 kvm_run
->exit_reason
= KVM_EXIT_SHUTDOWN
;
2887 clear_bit(KVM_REQ_PENDING_TIMER
, &vcpu
->requests
);
2888 kvm_inject_pending_timer_irqs(vcpu
);
2892 kvm_x86_ops
->prepare_guest_switch(vcpu
);
2893 kvm_load_guest_fpu(vcpu
);
2895 local_irq_disable();
2897 if (vcpu
->requests
|| need_resched() || signal_pending(current
)) {
2904 if (vcpu
->guest_debug
.enabled
)
2905 kvm_x86_ops
->guest_debug_pre(vcpu
);
2907 vcpu
->guest_mode
= 1;
2909 * Make sure that guest_mode assignment won't happen after
2910 * testing the pending IRQ vector bitmap.
2914 if (vcpu
->arch
.exception
.pending
)
2915 __queue_exception(vcpu
);
2916 else if (irqchip_in_kernel(vcpu
->kvm
))
2917 kvm_x86_ops
->inject_pending_irq(vcpu
);
2919 kvm_x86_ops
->inject_pending_vectors(vcpu
, kvm_run
);
2921 kvm_lapic_sync_to_vapic(vcpu
);
2923 up_read(&vcpu
->kvm
->slots_lock
);
2928 KVMTRACE_0D(VMENTRY
, vcpu
, entryexit
);
2929 kvm_x86_ops
->run(vcpu
, kvm_run
);
2931 vcpu
->guest_mode
= 0;
2937 * We must have an instruction between local_irq_enable() and
2938 * kvm_guest_exit(), so the timer interrupt isn't delayed by
2939 * the interrupt shadow. The stat.exits increment will do nicely.
2940 * But we need to prevent reordering, hence this barrier():
2948 down_read(&vcpu
->kvm
->slots_lock
);
2951 * Profile KVM exit RIPs:
2953 if (unlikely(prof_on
== KVM_PROFILING
)) {
2954 unsigned long rip
= kvm_rip_read(vcpu
);
2955 profile_hit(KVM_PROFILING
, (void *)rip
);
2958 if (vcpu
->arch
.exception
.pending
&& kvm_x86_ops
->exception_injected(vcpu
))
2959 vcpu
->arch
.exception
.pending
= false;
2961 kvm_lapic_sync_from_vapic(vcpu
);
2963 r
= kvm_x86_ops
->handle_exit(kvm_run
, vcpu
);
2968 static int __vcpu_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2972 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
)) {
2973 pr_debug("vcpu %d received sipi with vector # %x\n",
2974 vcpu
->vcpu_id
, vcpu
->arch
.sipi_vector
);
2975 kvm_lapic_reset(vcpu
);
2976 r
= kvm_x86_ops
->vcpu_reset(vcpu
);
2979 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
2982 down_read(&vcpu
->kvm
->slots_lock
);
2987 if (vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
)
2988 r
= vcpu_enter_guest(vcpu
, kvm_run
);
2990 up_read(&vcpu
->kvm
->slots_lock
);
2991 kvm_vcpu_block(vcpu
);
2992 down_read(&vcpu
->kvm
->slots_lock
);
2993 if (test_and_clear_bit(KVM_REQ_UNHALT
, &vcpu
->requests
))
2994 if (vcpu
->arch
.mp_state
== KVM_MP_STATE_HALTED
)
2995 vcpu
->arch
.mp_state
=
2996 KVM_MP_STATE_RUNNABLE
;
2997 if (vcpu
->arch
.mp_state
!= KVM_MP_STATE_RUNNABLE
)
3002 if (dm_request_for_irq_injection(vcpu
, kvm_run
)) {
3004 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
3005 ++vcpu
->stat
.request_irq_exits
;
3007 if (signal_pending(current
)) {
3009 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
3010 ++vcpu
->stat
.signal_exits
;
3012 if (need_resched()) {
3013 up_read(&vcpu
->kvm
->slots_lock
);
3015 down_read(&vcpu
->kvm
->slots_lock
);
3020 up_read(&vcpu
->kvm
->slots_lock
);
3021 post_kvm_run_save(vcpu
, kvm_run
);
3028 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3035 if (vcpu
->sigset_active
)
3036 sigprocmask(SIG_SETMASK
, &vcpu
->sigset
, &sigsaved
);
3038 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_UNINITIALIZED
)) {
3039 kvm_vcpu_block(vcpu
);
3040 clear_bit(KVM_REQ_UNHALT
, &vcpu
->requests
);
3045 /* re-sync apic's tpr */
3046 if (!irqchip_in_kernel(vcpu
->kvm
))
3047 kvm_set_cr8(vcpu
, kvm_run
->cr8
);
3049 if (vcpu
->arch
.pio
.cur_count
) {
3050 r
= complete_pio(vcpu
);
3054 #if CONFIG_HAS_IOMEM
3055 if (vcpu
->mmio_needed
) {
3056 memcpy(vcpu
->mmio_data
, kvm_run
->mmio
.data
, 8);
3057 vcpu
->mmio_read_completed
= 1;
3058 vcpu
->mmio_needed
= 0;
3060 down_read(&vcpu
->kvm
->slots_lock
);
3061 r
= emulate_instruction(vcpu
, kvm_run
,
3062 vcpu
->arch
.mmio_fault_cr2
, 0,
3063 EMULTYPE_NO_DECODE
);
3064 up_read(&vcpu
->kvm
->slots_lock
);
3065 if (r
== EMULATE_DO_MMIO
) {
3067 * Read-modify-write. Back to userspace.
3074 if (kvm_run
->exit_reason
== KVM_EXIT_HYPERCALL
)
3075 kvm_register_write(vcpu
, VCPU_REGS_RAX
,
3076 kvm_run
->hypercall
.ret
);
3078 r
= __vcpu_run(vcpu
, kvm_run
);
3081 if (vcpu
->sigset_active
)
3082 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
3088 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
3092 regs
->rax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3093 regs
->rbx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
3094 regs
->rcx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3095 regs
->rdx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
3096 regs
->rsi
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
3097 regs
->rdi
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
3098 regs
->rsp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
3099 regs
->rbp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
3100 #ifdef CONFIG_X86_64
3101 regs
->r8
= kvm_register_read(vcpu
, VCPU_REGS_R8
);
3102 regs
->r9
= kvm_register_read(vcpu
, VCPU_REGS_R9
);
3103 regs
->r10
= kvm_register_read(vcpu
, VCPU_REGS_R10
);
3104 regs
->r11
= kvm_register_read(vcpu
, VCPU_REGS_R11
);
3105 regs
->r12
= kvm_register_read(vcpu
, VCPU_REGS_R12
);
3106 regs
->r13
= kvm_register_read(vcpu
, VCPU_REGS_R13
);
3107 regs
->r14
= kvm_register_read(vcpu
, VCPU_REGS_R14
);
3108 regs
->r15
= kvm_register_read(vcpu
, VCPU_REGS_R15
);
3111 regs
->rip
= kvm_rip_read(vcpu
);
3112 regs
->rflags
= kvm_x86_ops
->get_rflags(vcpu
);
3115 * Don't leak debug flags in case they were set for guest debugging
3117 if (vcpu
->guest_debug
.enabled
&& vcpu
->guest_debug
.singlestep
)
3118 regs
->rflags
&= ~(X86_EFLAGS_TF
| X86_EFLAGS_RF
);
3125 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
3129 kvm_register_write(vcpu
, VCPU_REGS_RAX
, regs
->rax
);
3130 kvm_register_write(vcpu
, VCPU_REGS_RBX
, regs
->rbx
);
3131 kvm_register_write(vcpu
, VCPU_REGS_RCX
, regs
->rcx
);
3132 kvm_register_write(vcpu
, VCPU_REGS_RDX
, regs
->rdx
);
3133 kvm_register_write(vcpu
, VCPU_REGS_RSI
, regs
->rsi
);
3134 kvm_register_write(vcpu
, VCPU_REGS_RDI
, regs
->rdi
);
3135 kvm_register_write(vcpu
, VCPU_REGS_RSP
, regs
->rsp
);
3136 kvm_register_write(vcpu
, VCPU_REGS_RBP
, regs
->rbp
);
3137 #ifdef CONFIG_X86_64
3138 kvm_register_write(vcpu
, VCPU_REGS_R8
, regs
->r8
);
3139 kvm_register_write(vcpu
, VCPU_REGS_R9
, regs
->r9
);
3140 kvm_register_write(vcpu
, VCPU_REGS_R10
, regs
->r10
);
3141 kvm_register_write(vcpu
, VCPU_REGS_R11
, regs
->r11
);
3142 kvm_register_write(vcpu
, VCPU_REGS_R12
, regs
->r12
);
3143 kvm_register_write(vcpu
, VCPU_REGS_R13
, regs
->r13
);
3144 kvm_register_write(vcpu
, VCPU_REGS_R14
, regs
->r14
);
3145 kvm_register_write(vcpu
, VCPU_REGS_R15
, regs
->r15
);
3149 kvm_rip_write(vcpu
, regs
->rip
);
3150 kvm_x86_ops
->set_rflags(vcpu
, regs
->rflags
);
3153 vcpu
->arch
.exception
.pending
= false;
3160 void kvm_get_segment(struct kvm_vcpu
*vcpu
,
3161 struct kvm_segment
*var
, int seg
)
3163 kvm_x86_ops
->get_segment(vcpu
, var
, seg
);
3166 void kvm_get_cs_db_l_bits(struct kvm_vcpu
*vcpu
, int *db
, int *l
)
3168 struct kvm_segment cs
;
3170 kvm_get_segment(vcpu
, &cs
, VCPU_SREG_CS
);
3174 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits
);
3176 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
3177 struct kvm_sregs
*sregs
)
3179 struct descriptor_table dt
;
3184 kvm_get_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
3185 kvm_get_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
3186 kvm_get_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
3187 kvm_get_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
3188 kvm_get_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
3189 kvm_get_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
3191 kvm_get_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
3192 kvm_get_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
3194 kvm_x86_ops
->get_idt(vcpu
, &dt
);
3195 sregs
->idt
.limit
= dt
.limit
;
3196 sregs
->idt
.base
= dt
.base
;
3197 kvm_x86_ops
->get_gdt(vcpu
, &dt
);
3198 sregs
->gdt
.limit
= dt
.limit
;
3199 sregs
->gdt
.base
= dt
.base
;
3201 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
3202 sregs
->cr0
= vcpu
->arch
.cr0
;
3203 sregs
->cr2
= vcpu
->arch
.cr2
;
3204 sregs
->cr3
= vcpu
->arch
.cr3
;
3205 sregs
->cr4
= vcpu
->arch
.cr4
;
3206 sregs
->cr8
= kvm_get_cr8(vcpu
);
3207 sregs
->efer
= vcpu
->arch
.shadow_efer
;
3208 sregs
->apic_base
= kvm_get_apic_base(vcpu
);
3210 if (irqchip_in_kernel(vcpu
->kvm
)) {
3211 memset(sregs
->interrupt_bitmap
, 0,
3212 sizeof sregs
->interrupt_bitmap
);
3213 pending_vec
= kvm_x86_ops
->get_irq(vcpu
);
3214 if (pending_vec
>= 0)
3215 set_bit(pending_vec
,
3216 (unsigned long *)sregs
->interrupt_bitmap
);
3218 memcpy(sregs
->interrupt_bitmap
, vcpu
->arch
.irq_pending
,
3219 sizeof sregs
->interrupt_bitmap
);
3226 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
3227 struct kvm_mp_state
*mp_state
)
3230 mp_state
->mp_state
= vcpu
->arch
.mp_state
;
3235 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
3236 struct kvm_mp_state
*mp_state
)
3239 vcpu
->arch
.mp_state
= mp_state
->mp_state
;
3244 static void kvm_set_segment(struct kvm_vcpu
*vcpu
,
3245 struct kvm_segment
*var
, int seg
)
3247 kvm_x86_ops
->set_segment(vcpu
, var
, seg
);
3250 static void seg_desct_to_kvm_desct(struct desc_struct
*seg_desc
, u16 selector
,
3251 struct kvm_segment
*kvm_desct
)
3253 kvm_desct
->base
= seg_desc
->base0
;
3254 kvm_desct
->base
|= seg_desc
->base1
<< 16;
3255 kvm_desct
->base
|= seg_desc
->base2
<< 24;
3256 kvm_desct
->limit
= seg_desc
->limit0
;
3257 kvm_desct
->limit
|= seg_desc
->limit
<< 16;
3259 kvm_desct
->limit
<<= 12;
3260 kvm_desct
->limit
|= 0xfff;
3262 kvm_desct
->selector
= selector
;
3263 kvm_desct
->type
= seg_desc
->type
;
3264 kvm_desct
->present
= seg_desc
->p
;
3265 kvm_desct
->dpl
= seg_desc
->dpl
;
3266 kvm_desct
->db
= seg_desc
->d
;
3267 kvm_desct
->s
= seg_desc
->s
;
3268 kvm_desct
->l
= seg_desc
->l
;
3269 kvm_desct
->g
= seg_desc
->g
;
3270 kvm_desct
->avl
= seg_desc
->avl
;
3272 kvm_desct
->unusable
= 1;
3274 kvm_desct
->unusable
= 0;
3275 kvm_desct
->padding
= 0;
3278 static void get_segment_descritptor_dtable(struct kvm_vcpu
*vcpu
,
3280 struct descriptor_table
*dtable
)
3282 if (selector
& 1 << 2) {
3283 struct kvm_segment kvm_seg
;
3285 kvm_get_segment(vcpu
, &kvm_seg
, VCPU_SREG_LDTR
);
3287 if (kvm_seg
.unusable
)
3290 dtable
->limit
= kvm_seg
.limit
;
3291 dtable
->base
= kvm_seg
.base
;
3294 kvm_x86_ops
->get_gdt(vcpu
, dtable
);
3297 /* allowed just for 8 bytes segments */
3298 static int load_guest_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3299 struct desc_struct
*seg_desc
)
3302 struct descriptor_table dtable
;
3303 u16 index
= selector
>> 3;
3305 get_segment_descritptor_dtable(vcpu
, selector
, &dtable
);
3307 if (dtable
.limit
< index
* 8 + 7) {
3308 kvm_queue_exception_e(vcpu
, GP_VECTOR
, selector
& 0xfffc);
3311 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, dtable
.base
);
3313 return kvm_read_guest(vcpu
->kvm
, gpa
, seg_desc
, 8);
3316 /* allowed just for 8 bytes segments */
3317 static int save_guest_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3318 struct desc_struct
*seg_desc
)
3321 struct descriptor_table dtable
;
3322 u16 index
= selector
>> 3;
3324 get_segment_descritptor_dtable(vcpu
, selector
, &dtable
);
3326 if (dtable
.limit
< index
* 8 + 7)
3328 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, dtable
.base
);
3330 return kvm_write_guest(vcpu
->kvm
, gpa
, seg_desc
, 8);
3333 static u32
get_tss_base_addr(struct kvm_vcpu
*vcpu
,
3334 struct desc_struct
*seg_desc
)
3338 base_addr
= seg_desc
->base0
;
3339 base_addr
|= (seg_desc
->base1
<< 16);
3340 base_addr
|= (seg_desc
->base2
<< 24);
3342 return vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, base_addr
);
3345 static u16
get_segment_selector(struct kvm_vcpu
*vcpu
, int seg
)
3347 struct kvm_segment kvm_seg
;
3349 kvm_get_segment(vcpu
, &kvm_seg
, seg
);
3350 return kvm_seg
.selector
;
3353 static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu
*vcpu
,
3355 struct kvm_segment
*kvm_seg
)
3357 struct desc_struct seg_desc
;
3359 if (load_guest_segment_descriptor(vcpu
, selector
, &seg_desc
))
3361 seg_desct_to_kvm_desct(&seg_desc
, selector
, kvm_seg
);
3365 static int kvm_load_realmode_segment(struct kvm_vcpu
*vcpu
, u16 selector
, int seg
)
3367 struct kvm_segment segvar
= {
3368 .base
= selector
<< 4,
3370 .selector
= selector
,
3381 kvm_x86_ops
->set_segment(vcpu
, &segvar
, seg
);
3385 int kvm_load_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3386 int type_bits
, int seg
)
3388 struct kvm_segment kvm_seg
;
3390 if (!(vcpu
->arch
.cr0
& X86_CR0_PE
))
3391 return kvm_load_realmode_segment(vcpu
, selector
, seg
);
3392 if (load_segment_descriptor_to_kvm_desct(vcpu
, selector
, &kvm_seg
))
3394 kvm_seg
.type
|= type_bits
;
3396 if (seg
!= VCPU_SREG_SS
&& seg
!= VCPU_SREG_CS
&&
3397 seg
!= VCPU_SREG_LDTR
)
3399 kvm_seg
.unusable
= 1;
3401 kvm_set_segment(vcpu
, &kvm_seg
, seg
);
3405 static void save_state_to_tss32(struct kvm_vcpu
*vcpu
,
3406 struct tss_segment_32
*tss
)
3408 tss
->cr3
= vcpu
->arch
.cr3
;
3409 tss
->eip
= kvm_rip_read(vcpu
);
3410 tss
->eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3411 tss
->eax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3412 tss
->ecx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3413 tss
->edx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
3414 tss
->ebx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
3415 tss
->esp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
3416 tss
->ebp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
3417 tss
->esi
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
3418 tss
->edi
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
3419 tss
->es
= get_segment_selector(vcpu
, VCPU_SREG_ES
);
3420 tss
->cs
= get_segment_selector(vcpu
, VCPU_SREG_CS
);
3421 tss
->ss
= get_segment_selector(vcpu
, VCPU_SREG_SS
);
3422 tss
->ds
= get_segment_selector(vcpu
, VCPU_SREG_DS
);
3423 tss
->fs
= get_segment_selector(vcpu
, VCPU_SREG_FS
);
3424 tss
->gs
= get_segment_selector(vcpu
, VCPU_SREG_GS
);
3425 tss
->ldt_selector
= get_segment_selector(vcpu
, VCPU_SREG_LDTR
);
3426 tss
->prev_task_link
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3429 static int load_state_from_tss32(struct kvm_vcpu
*vcpu
,
3430 struct tss_segment_32
*tss
)
3432 kvm_set_cr3(vcpu
, tss
->cr3
);
3434 kvm_rip_write(vcpu
, tss
->eip
);
3435 kvm_x86_ops
->set_rflags(vcpu
, tss
->eflags
| 2);
3437 kvm_register_write(vcpu
, VCPU_REGS_RAX
, tss
->eax
);
3438 kvm_register_write(vcpu
, VCPU_REGS_RCX
, tss
->ecx
);
3439 kvm_register_write(vcpu
, VCPU_REGS_RDX
, tss
->edx
);
3440 kvm_register_write(vcpu
, VCPU_REGS_RBX
, tss
->ebx
);
3441 kvm_register_write(vcpu
, VCPU_REGS_RSP
, tss
->esp
);
3442 kvm_register_write(vcpu
, VCPU_REGS_RBP
, tss
->ebp
);
3443 kvm_register_write(vcpu
, VCPU_REGS_RSI
, tss
->esi
);
3444 kvm_register_write(vcpu
, VCPU_REGS_RDI
, tss
->edi
);
3446 if (kvm_load_segment_descriptor(vcpu
, tss
->ldt_selector
, 0, VCPU_SREG_LDTR
))
3449 if (kvm_load_segment_descriptor(vcpu
, tss
->es
, 1, VCPU_SREG_ES
))
3452 if (kvm_load_segment_descriptor(vcpu
, tss
->cs
, 9, VCPU_SREG_CS
))
3455 if (kvm_load_segment_descriptor(vcpu
, tss
->ss
, 1, VCPU_SREG_SS
))
3458 if (kvm_load_segment_descriptor(vcpu
, tss
->ds
, 1, VCPU_SREG_DS
))
3461 if (kvm_load_segment_descriptor(vcpu
, tss
->fs
, 1, VCPU_SREG_FS
))
3464 if (kvm_load_segment_descriptor(vcpu
, tss
->gs
, 1, VCPU_SREG_GS
))
3469 static void save_state_to_tss16(struct kvm_vcpu
*vcpu
,
3470 struct tss_segment_16
*tss
)
3472 tss
->ip
= kvm_rip_read(vcpu
);
3473 tss
->flag
= kvm_x86_ops
->get_rflags(vcpu
);
3474 tss
->ax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3475 tss
->cx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3476 tss
->dx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
3477 tss
->bx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
3478 tss
->sp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
3479 tss
->bp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
3480 tss
->si
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
3481 tss
->di
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
3483 tss
->es
= get_segment_selector(vcpu
, VCPU_SREG_ES
);
3484 tss
->cs
= get_segment_selector(vcpu
, VCPU_SREG_CS
);
3485 tss
->ss
= get_segment_selector(vcpu
, VCPU_SREG_SS
);
3486 tss
->ds
= get_segment_selector(vcpu
, VCPU_SREG_DS
);
3487 tss
->ldt
= get_segment_selector(vcpu
, VCPU_SREG_LDTR
);
3488 tss
->prev_task_link
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3491 static int load_state_from_tss16(struct kvm_vcpu
*vcpu
,
3492 struct tss_segment_16
*tss
)
3494 kvm_rip_write(vcpu
, tss
->ip
);
3495 kvm_x86_ops
->set_rflags(vcpu
, tss
->flag
| 2);
3496 kvm_register_write(vcpu
, VCPU_REGS_RAX
, tss
->ax
);
3497 kvm_register_write(vcpu
, VCPU_REGS_RCX
, tss
->cx
);
3498 kvm_register_write(vcpu
, VCPU_REGS_RDX
, tss
->dx
);
3499 kvm_register_write(vcpu
, VCPU_REGS_RBX
, tss
->bx
);
3500 kvm_register_write(vcpu
, VCPU_REGS_RSP
, tss
->sp
);
3501 kvm_register_write(vcpu
, VCPU_REGS_RBP
, tss
->bp
);
3502 kvm_register_write(vcpu
, VCPU_REGS_RSI
, tss
->si
);
3503 kvm_register_write(vcpu
, VCPU_REGS_RDI
, tss
->di
);
3505 if (kvm_load_segment_descriptor(vcpu
, tss
->ldt
, 0, VCPU_SREG_LDTR
))
3508 if (kvm_load_segment_descriptor(vcpu
, tss
->es
, 1, VCPU_SREG_ES
))
3511 if (kvm_load_segment_descriptor(vcpu
, tss
->cs
, 9, VCPU_SREG_CS
))
3514 if (kvm_load_segment_descriptor(vcpu
, tss
->ss
, 1, VCPU_SREG_SS
))
3517 if (kvm_load_segment_descriptor(vcpu
, tss
->ds
, 1, VCPU_SREG_DS
))
3522 static int kvm_task_switch_16(struct kvm_vcpu
*vcpu
, u16 tss_selector
,
3524 struct desc_struct
*nseg_desc
)
3526 struct tss_segment_16 tss_segment_16
;
3529 if (kvm_read_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_16
,
3530 sizeof tss_segment_16
))
3533 save_state_to_tss16(vcpu
, &tss_segment_16
);
3535 if (kvm_write_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_16
,
3536 sizeof tss_segment_16
))
3539 if (kvm_read_guest(vcpu
->kvm
, get_tss_base_addr(vcpu
, nseg_desc
),
3540 &tss_segment_16
, sizeof tss_segment_16
))
3543 if (load_state_from_tss16(vcpu
, &tss_segment_16
))
3551 static int kvm_task_switch_32(struct kvm_vcpu
*vcpu
, u16 tss_selector
,
3553 struct desc_struct
*nseg_desc
)
3555 struct tss_segment_32 tss_segment_32
;
3558 if (kvm_read_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_32
,
3559 sizeof tss_segment_32
))
3562 save_state_to_tss32(vcpu
, &tss_segment_32
);
3564 if (kvm_write_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_32
,
3565 sizeof tss_segment_32
))
3568 if (kvm_read_guest(vcpu
->kvm
, get_tss_base_addr(vcpu
, nseg_desc
),
3569 &tss_segment_32
, sizeof tss_segment_32
))
3572 if (load_state_from_tss32(vcpu
, &tss_segment_32
))
3580 int kvm_task_switch(struct kvm_vcpu
*vcpu
, u16 tss_selector
, int reason
)
3582 struct kvm_segment tr_seg
;
3583 struct desc_struct cseg_desc
;
3584 struct desc_struct nseg_desc
;
3586 u32 old_tss_base
= get_segment_base(vcpu
, VCPU_SREG_TR
);
3587 u16 old_tss_sel
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3589 old_tss_base
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, old_tss_base
);
3591 /* FIXME: Handle errors. Failure to read either TSS or their
3592 * descriptors should generate a pagefault.
3594 if (load_guest_segment_descriptor(vcpu
, tss_selector
, &nseg_desc
))
3597 if (load_guest_segment_descriptor(vcpu
, old_tss_sel
, &cseg_desc
))
3600 if (reason
!= TASK_SWITCH_IRET
) {
3603 cpl
= kvm_x86_ops
->get_cpl(vcpu
);
3604 if ((tss_selector
& 3) > nseg_desc
.dpl
|| cpl
> nseg_desc
.dpl
) {
3605 kvm_queue_exception_e(vcpu
, GP_VECTOR
, 0);
3610 if (!nseg_desc
.p
|| (nseg_desc
.limit0
| nseg_desc
.limit
<< 16) < 0x67) {
3611 kvm_queue_exception_e(vcpu
, TS_VECTOR
, tss_selector
& 0xfffc);
3615 if (reason
== TASK_SWITCH_IRET
|| reason
== TASK_SWITCH_JMP
) {
3616 cseg_desc
.type
&= ~(1 << 1); //clear the B flag
3617 save_guest_segment_descriptor(vcpu
, old_tss_sel
, &cseg_desc
);
3620 if (reason
== TASK_SWITCH_IRET
) {
3621 u32 eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3622 kvm_x86_ops
->set_rflags(vcpu
, eflags
& ~X86_EFLAGS_NT
);
3625 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
3627 if (nseg_desc
.type
& 8)
3628 ret
= kvm_task_switch_32(vcpu
, tss_selector
, old_tss_base
,
3631 ret
= kvm_task_switch_16(vcpu
, tss_selector
, old_tss_base
,
3634 if (reason
== TASK_SWITCH_CALL
|| reason
== TASK_SWITCH_GATE
) {
3635 u32 eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3636 kvm_x86_ops
->set_rflags(vcpu
, eflags
| X86_EFLAGS_NT
);
3639 if (reason
!= TASK_SWITCH_IRET
) {
3640 nseg_desc
.type
|= (1 << 1);
3641 save_guest_segment_descriptor(vcpu
, tss_selector
,
3645 kvm_x86_ops
->set_cr0(vcpu
, vcpu
->arch
.cr0
| X86_CR0_TS
);
3646 seg_desct_to_kvm_desct(&nseg_desc
, tss_selector
, &tr_seg
);
3648 kvm_set_segment(vcpu
, &tr_seg
, VCPU_SREG_TR
);
3652 EXPORT_SYMBOL_GPL(kvm_task_switch
);
3654 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
3655 struct kvm_sregs
*sregs
)
3657 int mmu_reset_needed
= 0;
3658 int i
, pending_vec
, max_bits
;
3659 struct descriptor_table dt
;
3663 dt
.limit
= sregs
->idt
.limit
;
3664 dt
.base
= sregs
->idt
.base
;
3665 kvm_x86_ops
->set_idt(vcpu
, &dt
);
3666 dt
.limit
= sregs
->gdt
.limit
;
3667 dt
.base
= sregs
->gdt
.base
;
3668 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
3670 vcpu
->arch
.cr2
= sregs
->cr2
;
3671 mmu_reset_needed
|= vcpu
->arch
.cr3
!= sregs
->cr3
;
3672 vcpu
->arch
.cr3
= sregs
->cr3
;
3674 kvm_set_cr8(vcpu
, sregs
->cr8
);
3676 mmu_reset_needed
|= vcpu
->arch
.shadow_efer
!= sregs
->efer
;
3677 kvm_x86_ops
->set_efer(vcpu
, sregs
->efer
);
3678 kvm_set_apic_base(vcpu
, sregs
->apic_base
);
3680 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
3682 mmu_reset_needed
|= vcpu
->arch
.cr0
!= sregs
->cr0
;
3683 kvm_x86_ops
->set_cr0(vcpu
, sregs
->cr0
);
3684 vcpu
->arch
.cr0
= sregs
->cr0
;
3686 mmu_reset_needed
|= vcpu
->arch
.cr4
!= sregs
->cr4
;
3687 kvm_x86_ops
->set_cr4(vcpu
, sregs
->cr4
);
3688 if (!is_long_mode(vcpu
) && is_pae(vcpu
))
3689 load_pdptrs(vcpu
, vcpu
->arch
.cr3
);
3691 if (mmu_reset_needed
)
3692 kvm_mmu_reset_context(vcpu
);
3694 if (!irqchip_in_kernel(vcpu
->kvm
)) {
3695 memcpy(vcpu
->arch
.irq_pending
, sregs
->interrupt_bitmap
,
3696 sizeof vcpu
->arch
.irq_pending
);
3697 vcpu
->arch
.irq_summary
= 0;
3698 for (i
= 0; i
< ARRAY_SIZE(vcpu
->arch
.irq_pending
); ++i
)
3699 if (vcpu
->arch
.irq_pending
[i
])
3700 __set_bit(i
, &vcpu
->arch
.irq_summary
);
3702 max_bits
= (sizeof sregs
->interrupt_bitmap
) << 3;
3703 pending_vec
= find_first_bit(
3704 (const unsigned long *)sregs
->interrupt_bitmap
,
3706 /* Only pending external irq is handled here */
3707 if (pending_vec
< max_bits
) {
3708 kvm_x86_ops
->set_irq(vcpu
, pending_vec
);
3709 pr_debug("Set back pending irq %d\n",
3712 kvm_pic_clear_isr_ack(vcpu
->kvm
);
3715 kvm_set_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
3716 kvm_set_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
3717 kvm_set_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
3718 kvm_set_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
3719 kvm_set_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
3720 kvm_set_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
3722 kvm_set_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
3723 kvm_set_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
3725 /* Older userspace won't unhalt the vcpu on reset. */
3726 if (vcpu
->vcpu_id
== 0 && kvm_rip_read(vcpu
) == 0xfff0 &&
3727 sregs
->cs
.selector
== 0xf000 && sregs
->cs
.base
== 0xffff0000 &&
3728 !(vcpu
->arch
.cr0
& X86_CR0_PE
))
3729 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
3736 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu
*vcpu
,
3737 struct kvm_debug_guest
*dbg
)
3743 r
= kvm_x86_ops
->set_guest_debug(vcpu
, dbg
);
3751 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
3752 * we have asm/x86/processor.h
3763 u32 st_space
[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
3764 #ifdef CONFIG_X86_64
3765 u32 xmm_space
[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
3767 u32 xmm_space
[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
3772 * Translate a guest virtual address to a guest physical address.
3774 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
3775 struct kvm_translation
*tr
)
3777 unsigned long vaddr
= tr
->linear_address
;
3781 down_read(&vcpu
->kvm
->slots_lock
);
3782 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, vaddr
);
3783 up_read(&vcpu
->kvm
->slots_lock
);
3784 tr
->physical_address
= gpa
;
3785 tr
->valid
= gpa
!= UNMAPPED_GVA
;
3793 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
3795 struct fxsave
*fxsave
= (struct fxsave
*)&vcpu
->arch
.guest_fx_image
;
3799 memcpy(fpu
->fpr
, fxsave
->st_space
, 128);
3800 fpu
->fcw
= fxsave
->cwd
;
3801 fpu
->fsw
= fxsave
->swd
;
3802 fpu
->ftwx
= fxsave
->twd
;
3803 fpu
->last_opcode
= fxsave
->fop
;
3804 fpu
->last_ip
= fxsave
->rip
;
3805 fpu
->last_dp
= fxsave
->rdp
;
3806 memcpy(fpu
->xmm
, fxsave
->xmm_space
, sizeof fxsave
->xmm_space
);
3813 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
3815 struct fxsave
*fxsave
= (struct fxsave
*)&vcpu
->arch
.guest_fx_image
;
3819 memcpy(fxsave
->st_space
, fpu
->fpr
, 128);
3820 fxsave
->cwd
= fpu
->fcw
;
3821 fxsave
->swd
= fpu
->fsw
;
3822 fxsave
->twd
= fpu
->ftwx
;
3823 fxsave
->fop
= fpu
->last_opcode
;
3824 fxsave
->rip
= fpu
->last_ip
;
3825 fxsave
->rdp
= fpu
->last_dp
;
3826 memcpy(fxsave
->xmm_space
, fpu
->xmm
, sizeof fxsave
->xmm_space
);
3833 void fx_init(struct kvm_vcpu
*vcpu
)
3835 unsigned after_mxcsr_mask
;
3838 * Touch the fpu the first time in non atomic context as if
3839 * this is the first fpu instruction the exception handler
3840 * will fire before the instruction returns and it'll have to
3841 * allocate ram with GFP_KERNEL.
3844 kvm_fx_save(&vcpu
->arch
.host_fx_image
);
3846 /* Initialize guest FPU by resetting ours and saving into guest's */
3848 kvm_fx_save(&vcpu
->arch
.host_fx_image
);
3850 kvm_fx_save(&vcpu
->arch
.guest_fx_image
);
3851 kvm_fx_restore(&vcpu
->arch
.host_fx_image
);
3854 vcpu
->arch
.cr0
|= X86_CR0_ET
;
3855 after_mxcsr_mask
= offsetof(struct i387_fxsave_struct
, st_space
);
3856 vcpu
->arch
.guest_fx_image
.mxcsr
= 0x1f80;
3857 memset((void *)&vcpu
->arch
.guest_fx_image
+ after_mxcsr_mask
,
3858 0, sizeof(struct i387_fxsave_struct
) - after_mxcsr_mask
);
3860 EXPORT_SYMBOL_GPL(fx_init
);
3862 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
)
3864 if (!vcpu
->fpu_active
|| vcpu
->guest_fpu_loaded
)
3867 vcpu
->guest_fpu_loaded
= 1;
3868 kvm_fx_save(&vcpu
->arch
.host_fx_image
);
3869 kvm_fx_restore(&vcpu
->arch
.guest_fx_image
);
3871 EXPORT_SYMBOL_GPL(kvm_load_guest_fpu
);
3873 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
)
3875 if (!vcpu
->guest_fpu_loaded
)
3878 vcpu
->guest_fpu_loaded
= 0;
3879 kvm_fx_save(&vcpu
->arch
.guest_fx_image
);
3880 kvm_fx_restore(&vcpu
->arch
.host_fx_image
);
3881 ++vcpu
->stat
.fpu_reload
;
3883 EXPORT_SYMBOL_GPL(kvm_put_guest_fpu
);
3885 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
)
3887 kvm_x86_ops
->vcpu_free(vcpu
);
3890 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
,
3893 return kvm_x86_ops
->vcpu_create(kvm
, id
);
3896 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
)
3900 /* We do fxsave: this must be aligned. */
3901 BUG_ON((unsigned long)&vcpu
->arch
.host_fx_image
& 0xF);
3904 r
= kvm_arch_vcpu_reset(vcpu
);
3906 r
= kvm_mmu_setup(vcpu
);
3913 kvm_x86_ops
->vcpu_free(vcpu
);
3917 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
)
3920 kvm_mmu_unload(vcpu
);
3923 kvm_x86_ops
->vcpu_free(vcpu
);
3926 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
)
3928 vcpu
->arch
.nmi_pending
= false;
3929 vcpu
->arch
.nmi_injected
= false;
3931 return kvm_x86_ops
->vcpu_reset(vcpu
);
3934 void kvm_arch_hardware_enable(void *garbage
)
3936 kvm_x86_ops
->hardware_enable(garbage
);
3939 void kvm_arch_hardware_disable(void *garbage
)
3941 kvm_x86_ops
->hardware_disable(garbage
);
3944 int kvm_arch_hardware_setup(void)
3946 return kvm_x86_ops
->hardware_setup();
3949 void kvm_arch_hardware_unsetup(void)
3951 kvm_x86_ops
->hardware_unsetup();
3954 void kvm_arch_check_processor_compat(void *rtn
)
3956 kvm_x86_ops
->check_processor_compatibility(rtn
);
3959 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
)
3965 BUG_ON(vcpu
->kvm
== NULL
);
3968 vcpu
->arch
.mmu
.root_hpa
= INVALID_PAGE
;
3969 if (!irqchip_in_kernel(kvm
) || vcpu
->vcpu_id
== 0)
3970 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
3972 vcpu
->arch
.mp_state
= KVM_MP_STATE_UNINITIALIZED
;
3974 page
= alloc_page(GFP_KERNEL
| __GFP_ZERO
);
3979 vcpu
->arch
.pio_data
= page_address(page
);
3981 r
= kvm_mmu_create(vcpu
);
3983 goto fail_free_pio_data
;
3985 if (irqchip_in_kernel(kvm
)) {
3986 r
= kvm_create_lapic(vcpu
);
3988 goto fail_mmu_destroy
;
3994 kvm_mmu_destroy(vcpu
);
3996 free_page((unsigned long)vcpu
->arch
.pio_data
);
4001 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
)
4003 kvm_free_lapic(vcpu
);
4004 down_read(&vcpu
->kvm
->slots_lock
);
4005 kvm_mmu_destroy(vcpu
);
4006 up_read(&vcpu
->kvm
->slots_lock
);
4007 free_page((unsigned long)vcpu
->arch
.pio_data
);
4010 struct kvm
*kvm_arch_create_vm(void)
4012 struct kvm
*kvm
= kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
4015 return ERR_PTR(-ENOMEM
);
4017 INIT_LIST_HEAD(&kvm
->arch
.active_mmu_pages
);
4018 INIT_LIST_HEAD(&kvm
->arch
.assigned_dev_head
);
4020 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
4021 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID
, &kvm
->arch
.irq_sources_bitmap
);
4026 static void kvm_unload_vcpu_mmu(struct kvm_vcpu
*vcpu
)
4029 kvm_mmu_unload(vcpu
);
4033 static void kvm_free_vcpus(struct kvm
*kvm
)
4038 * Unpin any mmu pages first.
4040 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
)
4042 kvm_unload_vcpu_mmu(kvm
->vcpus
[i
]);
4043 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
) {
4044 if (kvm
->vcpus
[i
]) {
4045 kvm_arch_vcpu_free(kvm
->vcpus
[i
]);
4046 kvm
->vcpus
[i
] = NULL
;
4052 void kvm_arch_destroy_vm(struct kvm
*kvm
)
4054 kvm_iommu_unmap_guest(kvm
);
4055 kvm_free_all_assigned_devices(kvm
);
4057 kfree(kvm
->arch
.vpic
);
4058 kfree(kvm
->arch
.vioapic
);
4059 kvm_free_vcpus(kvm
);
4060 kvm_free_physmem(kvm
);
4061 if (kvm
->arch
.apic_access_page
)
4062 put_page(kvm
->arch
.apic_access_page
);
4063 if (kvm
->arch
.ept_identity_pagetable
)
4064 put_page(kvm
->arch
.ept_identity_pagetable
);
4068 int kvm_arch_set_memory_region(struct kvm
*kvm
,
4069 struct kvm_userspace_memory_region
*mem
,
4070 struct kvm_memory_slot old
,
4073 int npages
= mem
->memory_size
>> PAGE_SHIFT
;
4074 struct kvm_memory_slot
*memslot
= &kvm
->memslots
[mem
->slot
];
4076 /*To keep backward compatibility with older userspace,
4077 *x86 needs to hanlde !user_alloc case.
4080 if (npages
&& !old
.rmap
) {
4081 unsigned long userspace_addr
;
4083 down_write(¤t
->mm
->mmap_sem
);
4084 userspace_addr
= do_mmap(NULL
, 0,
4086 PROT_READ
| PROT_WRITE
,
4087 MAP_PRIVATE
| MAP_ANONYMOUS
,
4089 up_write(¤t
->mm
->mmap_sem
);
4091 if (IS_ERR((void *)userspace_addr
))
4092 return PTR_ERR((void *)userspace_addr
);
4094 /* set userspace_addr atomically for kvm_hva_to_rmapp */
4095 spin_lock(&kvm
->mmu_lock
);
4096 memslot
->userspace_addr
= userspace_addr
;
4097 spin_unlock(&kvm
->mmu_lock
);
4099 if (!old
.user_alloc
&& old
.rmap
) {
4102 down_write(¤t
->mm
->mmap_sem
);
4103 ret
= do_munmap(current
->mm
, old
.userspace_addr
,
4104 old
.npages
* PAGE_SIZE
);
4105 up_write(¤t
->mm
->mmap_sem
);
4108 "kvm_vm_ioctl_set_memory_region: "
4109 "failed to munmap memory\n");
4114 if (!kvm
->arch
.n_requested_mmu_pages
) {
4115 unsigned int nr_mmu_pages
= kvm_mmu_calculate_mmu_pages(kvm
);
4116 kvm_mmu_change_mmu_pages(kvm
, nr_mmu_pages
);
4119 kvm_mmu_slot_remove_write_access(kvm
, mem
->slot
);
4120 kvm_flush_remote_tlbs(kvm
);
4125 void kvm_arch_flush_shadow(struct kvm
*kvm
)
4127 kvm_mmu_zap_all(kvm
);
4130 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
)
4132 return vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
4133 || vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
4134 || vcpu
->arch
.nmi_pending
;
4137 static void vcpu_kick_intr(void *info
)
4140 struct kvm_vcpu
*vcpu
= (struct kvm_vcpu
*)info
;
4141 printk(KERN_DEBUG
"vcpu_kick_intr %p \n", vcpu
);
4145 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
)
4147 int ipi_pcpu
= vcpu
->cpu
;
4148 int cpu
= get_cpu();
4150 if (waitqueue_active(&vcpu
->wq
)) {
4151 wake_up_interruptible(&vcpu
->wq
);
4152 ++vcpu
->stat
.halt_wakeup
;
4155 * We may be called synchronously with irqs disabled in guest mode,
4156 * So need not to call smp_call_function_single() in that case.
4158 if (vcpu
->guest_mode
&& vcpu
->cpu
!= cpu
)
4159 smp_call_function_single(ipi_pcpu
, vcpu_kick_intr
, vcpu
, 0);