2 * Kernel-based Virtual Machine driver for Linux
4 * This module enables machines with Intel VT-x extensions to run virtual
5 * machines without emulation or binary translation.
7 * Copyright (C) 2006 Qumranet, Inc.
10 * Avi Kivity <avi@qumranet.com>
11 * Yaniv Kamay <yaniv@qumranet.com>
13 * This work is licensed under the terms of the GNU GPL, version 2. See
14 * the COPYING file in the top-level directory.
21 #include <linux/module.h>
23 #include <linux/highmem.h>
27 #include "segment_descriptor.h"
30 MODULE_AUTHOR("Qumranet");
31 MODULE_LICENSE("GPL");
33 static DEFINE_PER_CPU(struct vmcs
*, vmxarea
);
34 static DEFINE_PER_CPU(struct vmcs
*, current_vmcs
);
42 static struct vmcs_descriptor
{
48 #define VMX_SEGMENT_FIELD(seg) \
49 [VCPU_SREG_##seg] = { \
50 .selector = GUEST_##seg##_SELECTOR, \
51 .base = GUEST_##seg##_BASE, \
52 .limit = GUEST_##seg##_LIMIT, \
53 .ar_bytes = GUEST_##seg##_AR_BYTES, \
56 static struct kvm_vmx_segment_field
{
61 } kvm_vmx_segment_fields
[] = {
62 VMX_SEGMENT_FIELD(CS
),
63 VMX_SEGMENT_FIELD(DS
),
64 VMX_SEGMENT_FIELD(ES
),
65 VMX_SEGMENT_FIELD(FS
),
66 VMX_SEGMENT_FIELD(GS
),
67 VMX_SEGMENT_FIELD(SS
),
68 VMX_SEGMENT_FIELD(TR
),
69 VMX_SEGMENT_FIELD(LDTR
),
72 static const u32 vmx_msr_index
[] = {
74 MSR_SYSCALL_MASK
, MSR_LSTAR
, MSR_CSTAR
, MSR_KERNEL_GS_BASE
,
76 MSR_EFER
, MSR_K6_STAR
,
78 #define NR_VMX_MSR (sizeof(vmx_msr_index) / sizeof(*vmx_msr_index))
80 static inline int is_page_fault(u32 intr_info
)
82 return (intr_info
& (INTR_INFO_INTR_TYPE_MASK
| INTR_INFO_VECTOR_MASK
|
83 INTR_INFO_VALID_MASK
)) ==
84 (INTR_TYPE_EXCEPTION
| PF_VECTOR
| INTR_INFO_VALID_MASK
);
87 static inline int is_external_interrupt(u32 intr_info
)
89 return (intr_info
& (INTR_INFO_INTR_TYPE_MASK
| INTR_INFO_VALID_MASK
))
90 == (INTR_TYPE_EXT_INTR
| INTR_INFO_VALID_MASK
);
93 static struct vmx_msr_entry
*find_msr_entry(struct kvm_vcpu
*vcpu
, u32 msr
)
97 for (i
= 0; i
< vcpu
->nmsrs
; ++i
)
98 if (vcpu
->guest_msrs
[i
].index
== msr
)
99 return &vcpu
->guest_msrs
[i
];
103 static void vmcs_clear(struct vmcs
*vmcs
)
105 u64 phys_addr
= __pa(vmcs
);
108 asm volatile (ASM_VMX_VMCLEAR_RAX
"; setna %0"
109 : "=g"(error
) : "a"(&phys_addr
), "m"(phys_addr
)
112 printk(KERN_ERR
"kvm: vmclear fail: %p/%llx\n",
116 static void __vcpu_clear(void *arg
)
118 struct kvm_vcpu
*vcpu
= arg
;
119 int cpu
= raw_smp_processor_id();
121 if (vcpu
->cpu
== cpu
)
122 vmcs_clear(vcpu
->vmcs
);
123 if (per_cpu(current_vmcs
, cpu
) == vcpu
->vmcs
)
124 per_cpu(current_vmcs
, cpu
) = NULL
;
127 static unsigned long vmcs_readl(unsigned long field
)
131 asm volatile (ASM_VMX_VMREAD_RDX_RAX
132 : "=a"(value
) : "d"(field
) : "cc");
136 static u16
vmcs_read16(unsigned long field
)
138 return vmcs_readl(field
);
141 static u32
vmcs_read32(unsigned long field
)
143 return vmcs_readl(field
);
146 static u64
vmcs_read64(unsigned long field
)
149 return vmcs_readl(field
);
151 return vmcs_readl(field
) | ((u64
)vmcs_readl(field
+1) << 32);
155 static void vmcs_writel(unsigned long field
, unsigned long value
)
159 asm volatile (ASM_VMX_VMWRITE_RAX_RDX
"; setna %0"
160 : "=q"(error
) : "a"(value
), "d"(field
) : "cc" );
162 printk(KERN_ERR
"vmwrite error: reg %lx value %lx (err %d)\n",
163 field
, value
, vmcs_read32(VM_INSTRUCTION_ERROR
));
166 static void vmcs_write16(unsigned long field
, u16 value
)
168 vmcs_writel(field
, value
);
171 static void vmcs_write32(unsigned long field
, u32 value
)
173 vmcs_writel(field
, value
);
176 static void vmcs_write64(unsigned long field
, u64 value
)
179 vmcs_writel(field
, value
);
181 vmcs_writel(field
, value
);
183 vmcs_writel(field
+1, value
>> 32);
188 * Switches to specified vcpu, until a matching vcpu_put(), but assumes
189 * vcpu mutex is already taken.
191 static struct kvm_vcpu
*vmx_vcpu_load(struct kvm_vcpu
*vcpu
)
193 u64 phys_addr
= __pa(vcpu
->vmcs
);
198 if (vcpu
->cpu
!= cpu
) {
199 smp_call_function(__vcpu_clear
, vcpu
, 0, 1);
203 if (per_cpu(current_vmcs
, cpu
) != vcpu
->vmcs
) {
206 per_cpu(current_vmcs
, cpu
) = vcpu
->vmcs
;
207 asm volatile (ASM_VMX_VMPTRLD_RAX
"; setna %0"
208 : "=g"(error
) : "a"(&phys_addr
), "m"(phys_addr
)
211 printk(KERN_ERR
"kvm: vmptrld %p/%llx fail\n",
212 vcpu
->vmcs
, phys_addr
);
215 if (vcpu
->cpu
!= cpu
) {
216 struct descriptor_table dt
;
217 unsigned long sysenter_esp
;
221 * Linux uses per-cpu TSS and GDT, so set these when switching
224 vmcs_writel(HOST_TR_BASE
, read_tr_base()); /* 22.2.4 */
226 vmcs_writel(HOST_GDTR_BASE
, dt
.base
); /* 22.2.4 */
228 rdmsrl(MSR_IA32_SYSENTER_ESP
, sysenter_esp
);
229 vmcs_writel(HOST_IA32_SYSENTER_ESP
, sysenter_esp
); /* 22.2.3 */
234 static void vmx_vcpu_put(struct kvm_vcpu
*vcpu
)
239 static unsigned long vmx_get_rflags(struct kvm_vcpu
*vcpu
)
241 return vmcs_readl(GUEST_RFLAGS
);
244 static void vmx_set_rflags(struct kvm_vcpu
*vcpu
, unsigned long rflags
)
246 vmcs_writel(GUEST_RFLAGS
, rflags
);
249 static void skip_emulated_instruction(struct kvm_vcpu
*vcpu
)
252 u32 interruptibility
;
254 rip
= vmcs_readl(GUEST_RIP
);
255 rip
+= vmcs_read32(VM_EXIT_INSTRUCTION_LEN
);
256 vmcs_writel(GUEST_RIP
, rip
);
259 * We emulated an instruction, so temporary interrupt blocking
260 * should be removed, if set.
262 interruptibility
= vmcs_read32(GUEST_INTERRUPTIBILITY_INFO
);
263 if (interruptibility
& 3)
264 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO
,
265 interruptibility
& ~3);
266 vcpu
->interrupt_window_open
= 1;
269 static void vmx_inject_gp(struct kvm_vcpu
*vcpu
, unsigned error_code
)
271 printk(KERN_DEBUG
"inject_general_protection: rip 0x%lx\n",
272 vmcs_readl(GUEST_RIP
));
273 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE
, error_code
);
274 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD
,
276 INTR_TYPE_EXCEPTION
|
277 INTR_INFO_DELIEVER_CODE_MASK
|
278 INTR_INFO_VALID_MASK
);
282 * reads and returns guest's timestamp counter "register"
283 * guest_tsc = host_tsc + tsc_offset -- 21.3
285 static u64
guest_read_tsc(void)
287 u64 host_tsc
, tsc_offset
;
290 tsc_offset
= vmcs_read64(TSC_OFFSET
);
291 return host_tsc
+ tsc_offset
;
295 * writes 'guest_tsc' into guest's timestamp counter "register"
296 * guest_tsc = host_tsc + tsc_offset ==> tsc_offset = guest_tsc - host_tsc
298 static void guest_write_tsc(u64 guest_tsc
)
303 vmcs_write64(TSC_OFFSET
, guest_tsc
- host_tsc
);
306 static void reload_tss(void)
308 #ifndef CONFIG_X86_64
311 * VT restores TR but not its size. Useless.
313 struct descriptor_table gdt
;
314 struct segment_descriptor
*descs
;
317 descs
= (void *)gdt
.base
;
318 descs
[GDT_ENTRY_TSS
].type
= 9; /* available TSS */
324 * Reads an msr value (of 'msr_index') into 'pdata'.
325 * Returns 0 on success, non-0 otherwise.
326 * Assumes vcpu_load() was already called.
328 static int vmx_get_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64
*pdata
)
331 struct vmx_msr_entry
*msr
;
334 printk(KERN_ERR
"BUG: get_msr called with NULL pdata\n");
341 data
= vmcs_readl(GUEST_FS_BASE
);
344 data
= vmcs_readl(GUEST_GS_BASE
);
347 return kvm_get_msr_common(vcpu
, msr_index
, pdata
);
349 case MSR_IA32_TIME_STAMP_COUNTER
:
350 data
= guest_read_tsc();
352 case MSR_IA32_SYSENTER_CS
:
353 data
= vmcs_read32(GUEST_SYSENTER_CS
);
355 case MSR_IA32_SYSENTER_EIP
:
356 data
= vmcs_read32(GUEST_SYSENTER_EIP
);
358 case MSR_IA32_SYSENTER_ESP
:
359 data
= vmcs_read32(GUEST_SYSENTER_ESP
);
362 msr
= find_msr_entry(vcpu
, msr_index
);
367 return kvm_get_msr_common(vcpu
, msr_index
, pdata
);
375 * Writes msr value into into the appropriate "register".
376 * Returns 0 on success, non-0 otherwise.
377 * Assumes vcpu_load() was already called.
379 static int vmx_set_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64 data
)
381 struct vmx_msr_entry
*msr
;
385 return kvm_set_msr_common(vcpu
, msr_index
, data
);
387 vmcs_writel(GUEST_FS_BASE
, data
);
390 vmcs_writel(GUEST_GS_BASE
, data
);
393 case MSR_IA32_SYSENTER_CS
:
394 vmcs_write32(GUEST_SYSENTER_CS
, data
);
396 case MSR_IA32_SYSENTER_EIP
:
397 vmcs_write32(GUEST_SYSENTER_EIP
, data
);
399 case MSR_IA32_SYSENTER_ESP
:
400 vmcs_write32(GUEST_SYSENTER_ESP
, data
);
402 case MSR_IA32_TIME_STAMP_COUNTER
: {
403 guest_write_tsc(data
);
407 msr
= find_msr_entry(vcpu
, msr_index
);
412 return kvm_set_msr_common(vcpu
, msr_index
, data
);
421 * Sync the rsp and rip registers into the vcpu structure. This allows
422 * registers to be accessed by indexing vcpu->regs.
424 static void vcpu_load_rsp_rip(struct kvm_vcpu
*vcpu
)
426 vcpu
->regs
[VCPU_REGS_RSP
] = vmcs_readl(GUEST_RSP
);
427 vcpu
->rip
= vmcs_readl(GUEST_RIP
);
431 * Syncs rsp and rip back into the vmcs. Should be called after possible
434 static void vcpu_put_rsp_rip(struct kvm_vcpu
*vcpu
)
436 vmcs_writel(GUEST_RSP
, vcpu
->regs
[VCPU_REGS_RSP
]);
437 vmcs_writel(GUEST_RIP
, vcpu
->rip
);
440 static int set_guest_debug(struct kvm_vcpu
*vcpu
, struct kvm_debug_guest
*dbg
)
442 unsigned long dr7
= 0x400;
443 u32 exception_bitmap
;
446 exception_bitmap
= vmcs_read32(EXCEPTION_BITMAP
);
447 old_singlestep
= vcpu
->guest_debug
.singlestep
;
449 vcpu
->guest_debug
.enabled
= dbg
->enabled
;
450 if (vcpu
->guest_debug
.enabled
) {
453 dr7
|= 0x200; /* exact */
454 for (i
= 0; i
< 4; ++i
) {
455 if (!dbg
->breakpoints
[i
].enabled
)
457 vcpu
->guest_debug
.bp
[i
] = dbg
->breakpoints
[i
].address
;
458 dr7
|= 2 << (i
*2); /* global enable */
459 dr7
|= 0 << (i
*4+16); /* execution breakpoint */
462 exception_bitmap
|= (1u << 1); /* Trap debug exceptions */
464 vcpu
->guest_debug
.singlestep
= dbg
->singlestep
;
466 exception_bitmap
&= ~(1u << 1); /* Ignore debug exceptions */
467 vcpu
->guest_debug
.singlestep
= 0;
470 if (old_singlestep
&& !vcpu
->guest_debug
.singlestep
) {
473 flags
= vmcs_readl(GUEST_RFLAGS
);
474 flags
&= ~(X86_EFLAGS_TF
| X86_EFLAGS_RF
);
475 vmcs_writel(GUEST_RFLAGS
, flags
);
478 vmcs_write32(EXCEPTION_BITMAP
, exception_bitmap
);
479 vmcs_writel(GUEST_DR7
, dr7
);
484 static __init
int cpu_has_kvm_support(void)
486 unsigned long ecx
= cpuid_ecx(1);
487 return test_bit(5, &ecx
); /* CPUID.1:ECX.VMX[bit 5] -> VT */
490 static __init
int vmx_disabled_by_bios(void)
494 rdmsrl(MSR_IA32_FEATURE_CONTROL
, msr
);
495 return (msr
& 5) == 1; /* locked but not enabled */
498 static __init
void hardware_enable(void *garbage
)
500 int cpu
= raw_smp_processor_id();
501 u64 phys_addr
= __pa(per_cpu(vmxarea
, cpu
));
504 rdmsrl(MSR_IA32_FEATURE_CONTROL
, old
);
506 /* enable and lock */
507 wrmsrl(MSR_IA32_FEATURE_CONTROL
, old
| 5);
508 write_cr4(read_cr4() | CR4_VMXE
); /* FIXME: not cpu hotplug safe */
509 asm volatile (ASM_VMX_VMXON_RAX
: : "a"(&phys_addr
), "m"(phys_addr
)
513 static void hardware_disable(void *garbage
)
515 asm volatile (ASM_VMX_VMXOFF
: : : "cc");
518 static __init
void setup_vmcs_descriptor(void)
520 u32 vmx_msr_low
, vmx_msr_high
;
522 rdmsr(MSR_IA32_VMX_BASIC
, vmx_msr_low
, vmx_msr_high
);
523 vmcs_descriptor
.size
= vmx_msr_high
& 0x1fff;
524 vmcs_descriptor
.order
= get_order(vmcs_descriptor
.size
);
525 vmcs_descriptor
.revision_id
= vmx_msr_low
;
528 static struct vmcs
*alloc_vmcs_cpu(int cpu
)
530 int node
= cpu_to_node(cpu
);
534 pages
= alloc_pages_node(node
, GFP_KERNEL
, vmcs_descriptor
.order
);
537 vmcs
= page_address(pages
);
538 memset(vmcs
, 0, vmcs_descriptor
.size
);
539 vmcs
->revision_id
= vmcs_descriptor
.revision_id
; /* vmcs revision id */
543 static struct vmcs
*alloc_vmcs(void)
545 return alloc_vmcs_cpu(raw_smp_processor_id());
548 static void free_vmcs(struct vmcs
*vmcs
)
550 free_pages((unsigned long)vmcs
, vmcs_descriptor
.order
);
553 static __exit
void free_kvm_area(void)
557 for_each_online_cpu(cpu
)
558 free_vmcs(per_cpu(vmxarea
, cpu
));
561 extern struct vmcs
*alloc_vmcs_cpu(int cpu
);
563 static __init
int alloc_kvm_area(void)
567 for_each_online_cpu(cpu
) {
570 vmcs
= alloc_vmcs_cpu(cpu
);
576 per_cpu(vmxarea
, cpu
) = vmcs
;
581 static __init
int hardware_setup(void)
583 setup_vmcs_descriptor();
584 return alloc_kvm_area();
587 static __exit
void hardware_unsetup(void)
592 static void update_exception_bitmap(struct kvm_vcpu
*vcpu
)
594 if (vcpu
->rmode
.active
)
595 vmcs_write32(EXCEPTION_BITMAP
, ~0);
597 vmcs_write32(EXCEPTION_BITMAP
, 1 << PF_VECTOR
);
600 static void fix_pmode_dataseg(int seg
, struct kvm_save_segment
*save
)
602 struct kvm_vmx_segment_field
*sf
= &kvm_vmx_segment_fields
[seg
];
604 if (vmcs_readl(sf
->base
) == save
->base
) {
605 vmcs_write16(sf
->selector
, save
->selector
);
606 vmcs_writel(sf
->base
, save
->base
);
607 vmcs_write32(sf
->limit
, save
->limit
);
608 vmcs_write32(sf
->ar_bytes
, save
->ar
);
610 u32 dpl
= (vmcs_read16(sf
->selector
) & SELECTOR_RPL_MASK
)
612 vmcs_write32(sf
->ar_bytes
, 0x93 | dpl
);
616 static void enter_pmode(struct kvm_vcpu
*vcpu
)
620 vcpu
->rmode
.active
= 0;
622 vmcs_writel(GUEST_TR_BASE
, vcpu
->rmode
.tr
.base
);
623 vmcs_write32(GUEST_TR_LIMIT
, vcpu
->rmode
.tr
.limit
);
624 vmcs_write32(GUEST_TR_AR_BYTES
, vcpu
->rmode
.tr
.ar
);
626 flags
= vmcs_readl(GUEST_RFLAGS
);
627 flags
&= ~(IOPL_MASK
| X86_EFLAGS_VM
);
628 flags
|= (vcpu
->rmode
.save_iopl
<< IOPL_SHIFT
);
629 vmcs_writel(GUEST_RFLAGS
, flags
);
631 vmcs_writel(GUEST_CR4
, (vmcs_readl(GUEST_CR4
) & ~CR4_VME_MASK
) |
632 (vmcs_readl(CR4_READ_SHADOW
) & CR4_VME_MASK
));
634 update_exception_bitmap(vcpu
);
636 fix_pmode_dataseg(VCPU_SREG_ES
, &vcpu
->rmode
.es
);
637 fix_pmode_dataseg(VCPU_SREG_DS
, &vcpu
->rmode
.ds
);
638 fix_pmode_dataseg(VCPU_SREG_GS
, &vcpu
->rmode
.gs
);
639 fix_pmode_dataseg(VCPU_SREG_FS
, &vcpu
->rmode
.fs
);
641 vmcs_write16(GUEST_SS_SELECTOR
, 0);
642 vmcs_write32(GUEST_SS_AR_BYTES
, 0x93);
644 vmcs_write16(GUEST_CS_SELECTOR
,
645 vmcs_read16(GUEST_CS_SELECTOR
) & ~SELECTOR_RPL_MASK
);
646 vmcs_write32(GUEST_CS_AR_BYTES
, 0x9b);
649 static int rmode_tss_base(struct kvm
* kvm
)
651 gfn_t base_gfn
= kvm
->memslots
[0].base_gfn
+ kvm
->memslots
[0].npages
- 3;
652 return base_gfn
<< PAGE_SHIFT
;
655 static void fix_rmode_seg(int seg
, struct kvm_save_segment
*save
)
657 struct kvm_vmx_segment_field
*sf
= &kvm_vmx_segment_fields
[seg
];
659 save
->selector
= vmcs_read16(sf
->selector
);
660 save
->base
= vmcs_readl(sf
->base
);
661 save
->limit
= vmcs_read32(sf
->limit
);
662 save
->ar
= vmcs_read32(sf
->ar_bytes
);
663 vmcs_write16(sf
->selector
, vmcs_readl(sf
->base
) >> 4);
664 vmcs_write32(sf
->limit
, 0xffff);
665 vmcs_write32(sf
->ar_bytes
, 0xf3);
668 static void enter_rmode(struct kvm_vcpu
*vcpu
)
672 vcpu
->rmode
.active
= 1;
674 vcpu
->rmode
.tr
.base
= vmcs_readl(GUEST_TR_BASE
);
675 vmcs_writel(GUEST_TR_BASE
, rmode_tss_base(vcpu
->kvm
));
677 vcpu
->rmode
.tr
.limit
= vmcs_read32(GUEST_TR_LIMIT
);
678 vmcs_write32(GUEST_TR_LIMIT
, RMODE_TSS_SIZE
- 1);
680 vcpu
->rmode
.tr
.ar
= vmcs_read32(GUEST_TR_AR_BYTES
);
681 vmcs_write32(GUEST_TR_AR_BYTES
, 0x008b);
683 flags
= vmcs_readl(GUEST_RFLAGS
);
684 vcpu
->rmode
.save_iopl
= (flags
& IOPL_MASK
) >> IOPL_SHIFT
;
686 flags
|= IOPL_MASK
| X86_EFLAGS_VM
;
688 vmcs_writel(GUEST_RFLAGS
, flags
);
689 vmcs_writel(GUEST_CR4
, vmcs_readl(GUEST_CR4
) | CR4_VME_MASK
);
690 update_exception_bitmap(vcpu
);
692 vmcs_write16(GUEST_SS_SELECTOR
, vmcs_readl(GUEST_SS_BASE
) >> 4);
693 vmcs_write32(GUEST_SS_LIMIT
, 0xffff);
694 vmcs_write32(GUEST_SS_AR_BYTES
, 0xf3);
696 vmcs_write32(GUEST_CS_AR_BYTES
, 0xf3);
697 vmcs_write32(GUEST_CS_LIMIT
, 0xffff);
698 vmcs_write16(GUEST_CS_SELECTOR
, vmcs_readl(GUEST_CS_BASE
) >> 4);
700 fix_rmode_seg(VCPU_SREG_ES
, &vcpu
->rmode
.es
);
701 fix_rmode_seg(VCPU_SREG_DS
, &vcpu
->rmode
.ds
);
702 fix_rmode_seg(VCPU_SREG_GS
, &vcpu
->rmode
.gs
);
703 fix_rmode_seg(VCPU_SREG_FS
, &vcpu
->rmode
.fs
);
708 static void enter_lmode(struct kvm_vcpu
*vcpu
)
712 guest_tr_ar
= vmcs_read32(GUEST_TR_AR_BYTES
);
713 if ((guest_tr_ar
& AR_TYPE_MASK
) != AR_TYPE_BUSY_64_TSS
) {
714 printk(KERN_DEBUG
"%s: tss fixup for long mode. \n",
716 vmcs_write32(GUEST_TR_AR_BYTES
,
717 (guest_tr_ar
& ~AR_TYPE_MASK
)
718 | AR_TYPE_BUSY_64_TSS
);
721 vcpu
->shadow_efer
|= EFER_LMA
;
723 find_msr_entry(vcpu
, MSR_EFER
)->data
|= EFER_LMA
| EFER_LME
;
724 vmcs_write32(VM_ENTRY_CONTROLS
,
725 vmcs_read32(VM_ENTRY_CONTROLS
)
726 | VM_ENTRY_CONTROLS_IA32E_MASK
);
729 static void exit_lmode(struct kvm_vcpu
*vcpu
)
731 vcpu
->shadow_efer
&= ~EFER_LMA
;
733 vmcs_write32(VM_ENTRY_CONTROLS
,
734 vmcs_read32(VM_ENTRY_CONTROLS
)
735 & ~VM_ENTRY_CONTROLS_IA32E_MASK
);
740 static void vmx_decache_cr0_cr4_guest_bits(struct kvm_vcpu
*vcpu
)
742 vcpu
->cr0
&= KVM_GUEST_CR0_MASK
;
743 vcpu
->cr0
|= vmcs_readl(GUEST_CR0
) & ~KVM_GUEST_CR0_MASK
;
745 vcpu
->cr4
&= KVM_GUEST_CR4_MASK
;
746 vcpu
->cr4
|= vmcs_readl(GUEST_CR4
) & ~KVM_GUEST_CR4_MASK
;
749 static void vmx_set_cr0(struct kvm_vcpu
*vcpu
, unsigned long cr0
)
751 if (vcpu
->rmode
.active
&& (cr0
& CR0_PE_MASK
))
754 if (!vcpu
->rmode
.active
&& !(cr0
& CR0_PE_MASK
))
758 if (vcpu
->shadow_efer
& EFER_LME
) {
759 if (!is_paging(vcpu
) && (cr0
& CR0_PG_MASK
))
761 if (is_paging(vcpu
) && !(cr0
& CR0_PG_MASK
))
766 vmcs_writel(CR0_READ_SHADOW
, cr0
);
767 vmcs_writel(GUEST_CR0
,
768 (cr0
& ~KVM_GUEST_CR0_MASK
) | KVM_VM_CR0_ALWAYS_ON
);
773 * Used when restoring the VM to avoid corrupting segment registers
775 static void vmx_set_cr0_no_modeswitch(struct kvm_vcpu
*vcpu
, unsigned long cr0
)
777 vcpu
->rmode
.active
= ((cr0
& CR0_PE_MASK
) == 0);
778 update_exception_bitmap(vcpu
);
779 vmcs_writel(CR0_READ_SHADOW
, cr0
);
780 vmcs_writel(GUEST_CR0
,
781 (cr0
& ~KVM_GUEST_CR0_MASK
) | KVM_VM_CR0_ALWAYS_ON
);
785 static void vmx_set_cr3(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
787 vmcs_writel(GUEST_CR3
, cr3
);
790 static void vmx_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
)
792 vmcs_writel(CR4_READ_SHADOW
, cr4
);
793 vmcs_writel(GUEST_CR4
, cr4
| (vcpu
->rmode
.active
?
794 KVM_RMODE_VM_CR4_ALWAYS_ON
: KVM_PMODE_VM_CR4_ALWAYS_ON
));
800 static void vmx_set_efer(struct kvm_vcpu
*vcpu
, u64 efer
)
802 struct vmx_msr_entry
*msr
= find_msr_entry(vcpu
, MSR_EFER
);
804 vcpu
->shadow_efer
= efer
;
805 if (efer
& EFER_LMA
) {
806 vmcs_write32(VM_ENTRY_CONTROLS
,
807 vmcs_read32(VM_ENTRY_CONTROLS
) |
808 VM_ENTRY_CONTROLS_IA32E_MASK
);
812 vmcs_write32(VM_ENTRY_CONTROLS
,
813 vmcs_read32(VM_ENTRY_CONTROLS
) &
814 ~VM_ENTRY_CONTROLS_IA32E_MASK
);
816 msr
->data
= efer
& ~EFER_LME
;
822 static u64
vmx_get_segment_base(struct kvm_vcpu
*vcpu
, int seg
)
824 struct kvm_vmx_segment_field
*sf
= &kvm_vmx_segment_fields
[seg
];
826 return vmcs_readl(sf
->base
);
829 static void vmx_get_segment(struct kvm_vcpu
*vcpu
,
830 struct kvm_segment
*var
, int seg
)
832 struct kvm_vmx_segment_field
*sf
= &kvm_vmx_segment_fields
[seg
];
835 var
->base
= vmcs_readl(sf
->base
);
836 var
->limit
= vmcs_read32(sf
->limit
);
837 var
->selector
= vmcs_read16(sf
->selector
);
838 ar
= vmcs_read32(sf
->ar_bytes
);
839 if (ar
& AR_UNUSABLE_MASK
)
842 var
->s
= (ar
>> 4) & 1;
843 var
->dpl
= (ar
>> 5) & 3;
844 var
->present
= (ar
>> 7) & 1;
845 var
->avl
= (ar
>> 12) & 1;
846 var
->l
= (ar
>> 13) & 1;
847 var
->db
= (ar
>> 14) & 1;
848 var
->g
= (ar
>> 15) & 1;
849 var
->unusable
= (ar
>> 16) & 1;
852 static void vmx_set_segment(struct kvm_vcpu
*vcpu
,
853 struct kvm_segment
*var
, int seg
)
855 struct kvm_vmx_segment_field
*sf
= &kvm_vmx_segment_fields
[seg
];
858 vmcs_writel(sf
->base
, var
->base
);
859 vmcs_write32(sf
->limit
, var
->limit
);
860 vmcs_write16(sf
->selector
, var
->selector
);
865 ar
|= (var
->s
& 1) << 4;
866 ar
|= (var
->dpl
& 3) << 5;
867 ar
|= (var
->present
& 1) << 7;
868 ar
|= (var
->avl
& 1) << 12;
869 ar
|= (var
->l
& 1) << 13;
870 ar
|= (var
->db
& 1) << 14;
871 ar
|= (var
->g
& 1) << 15;
873 if (ar
== 0) /* a 0 value means unusable */
874 ar
= AR_UNUSABLE_MASK
;
875 vmcs_write32(sf
->ar_bytes
, ar
);
878 static void vmx_get_cs_db_l_bits(struct kvm_vcpu
*vcpu
, int *db
, int *l
)
880 u32 ar
= vmcs_read32(GUEST_CS_AR_BYTES
);
882 *db
= (ar
>> 14) & 1;
886 static void vmx_get_idt(struct kvm_vcpu
*vcpu
, struct descriptor_table
*dt
)
888 dt
->limit
= vmcs_read32(GUEST_IDTR_LIMIT
);
889 dt
->base
= vmcs_readl(GUEST_IDTR_BASE
);
892 static void vmx_set_idt(struct kvm_vcpu
*vcpu
, struct descriptor_table
*dt
)
894 vmcs_write32(GUEST_IDTR_LIMIT
, dt
->limit
);
895 vmcs_writel(GUEST_IDTR_BASE
, dt
->base
);
898 static void vmx_get_gdt(struct kvm_vcpu
*vcpu
, struct descriptor_table
*dt
)
900 dt
->limit
= vmcs_read32(GUEST_GDTR_LIMIT
);
901 dt
->base
= vmcs_readl(GUEST_GDTR_BASE
);
904 static void vmx_set_gdt(struct kvm_vcpu
*vcpu
, struct descriptor_table
*dt
)
906 vmcs_write32(GUEST_GDTR_LIMIT
, dt
->limit
);
907 vmcs_writel(GUEST_GDTR_BASE
, dt
->base
);
910 static int init_rmode_tss(struct kvm
* kvm
)
912 struct page
*p1
, *p2
, *p3
;
913 gfn_t fn
= rmode_tss_base(kvm
) >> PAGE_SHIFT
;
916 p1
= _gfn_to_page(kvm
, fn
++);
917 p2
= _gfn_to_page(kvm
, fn
++);
918 p3
= _gfn_to_page(kvm
, fn
);
920 if (!p1
|| !p2
|| !p3
) {
921 kvm_printf(kvm
,"%s: gfn_to_page failed\n", __FUNCTION__
);
925 page
= kmap_atomic(p1
, KM_USER0
);
926 memset(page
, 0, PAGE_SIZE
);
927 *(u16
*)(page
+ 0x66) = TSS_BASE_SIZE
+ TSS_REDIRECTION_SIZE
;
928 kunmap_atomic(page
, KM_USER0
);
930 page
= kmap_atomic(p2
, KM_USER0
);
931 memset(page
, 0, PAGE_SIZE
);
932 kunmap_atomic(page
, KM_USER0
);
934 page
= kmap_atomic(p3
, KM_USER0
);
935 memset(page
, 0, PAGE_SIZE
);
936 *(page
+ RMODE_TSS_SIZE
- 2 * PAGE_SIZE
- 1) = ~0;
937 kunmap_atomic(page
, KM_USER0
);
942 static void vmcs_write32_fixedbits(u32 msr
, u32 vmcs_field
, u32 val
)
944 u32 msr_high
, msr_low
;
946 rdmsr(msr
, msr_low
, msr_high
);
950 vmcs_write32(vmcs_field
, val
);
953 static void seg_setup(int seg
)
955 struct kvm_vmx_segment_field
*sf
= &kvm_vmx_segment_fields
[seg
];
957 vmcs_write16(sf
->selector
, 0);
958 vmcs_writel(sf
->base
, 0);
959 vmcs_write32(sf
->limit
, 0xffff);
960 vmcs_write32(sf
->ar_bytes
, 0x93);
964 * Sets up the vmcs for emulated real mode.
966 static int vmx_vcpu_setup(struct kvm_vcpu
*vcpu
)
968 u32 host_sysenter_cs
;
971 struct descriptor_table dt
;
975 extern asmlinkage
void kvm_vmx_return(void);
977 if (!init_rmode_tss(vcpu
->kvm
)) {
982 memset(vcpu
->regs
, 0, sizeof(vcpu
->regs
));
983 vcpu
->regs
[VCPU_REGS_RDX
] = get_rdx_init_val();
985 vcpu
->apic_base
= 0xfee00000 |
986 /*for vcpu 0*/ MSR_IA32_APICBASE_BSP
|
987 MSR_IA32_APICBASE_ENABLE
;
992 * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode
993 * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh.
995 vmcs_write16(GUEST_CS_SELECTOR
, 0xf000);
996 vmcs_writel(GUEST_CS_BASE
, 0x000f0000);
997 vmcs_write32(GUEST_CS_LIMIT
, 0xffff);
998 vmcs_write32(GUEST_CS_AR_BYTES
, 0x9b);
1000 seg_setup(VCPU_SREG_DS
);
1001 seg_setup(VCPU_SREG_ES
);
1002 seg_setup(VCPU_SREG_FS
);
1003 seg_setup(VCPU_SREG_GS
);
1004 seg_setup(VCPU_SREG_SS
);
1006 vmcs_write16(GUEST_TR_SELECTOR
, 0);
1007 vmcs_writel(GUEST_TR_BASE
, 0);
1008 vmcs_write32(GUEST_TR_LIMIT
, 0xffff);
1009 vmcs_write32(GUEST_TR_AR_BYTES
, 0x008b);
1011 vmcs_write16(GUEST_LDTR_SELECTOR
, 0);
1012 vmcs_writel(GUEST_LDTR_BASE
, 0);
1013 vmcs_write32(GUEST_LDTR_LIMIT
, 0xffff);
1014 vmcs_write32(GUEST_LDTR_AR_BYTES
, 0x00082);
1016 vmcs_write32(GUEST_SYSENTER_CS
, 0);
1017 vmcs_writel(GUEST_SYSENTER_ESP
, 0);
1018 vmcs_writel(GUEST_SYSENTER_EIP
, 0);
1020 vmcs_writel(GUEST_RFLAGS
, 0x02);
1021 vmcs_writel(GUEST_RIP
, 0xfff0);
1022 vmcs_writel(GUEST_RSP
, 0);
1024 vmcs_writel(GUEST_CR3
, 0);
1026 //todo: dr0 = dr1 = dr2 = dr3 = 0; dr6 = 0xffff0ff0
1027 vmcs_writel(GUEST_DR7
, 0x400);
1029 vmcs_writel(GUEST_GDTR_BASE
, 0);
1030 vmcs_write32(GUEST_GDTR_LIMIT
, 0xffff);
1032 vmcs_writel(GUEST_IDTR_BASE
, 0);
1033 vmcs_write32(GUEST_IDTR_LIMIT
, 0xffff);
1035 vmcs_write32(GUEST_ACTIVITY_STATE
, 0);
1036 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO
, 0);
1037 vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS
, 0);
1040 vmcs_write64(IO_BITMAP_A
, 0);
1041 vmcs_write64(IO_BITMAP_B
, 0);
1045 vmcs_write64(VMCS_LINK_POINTER
, -1ull); /* 22.3.1.5 */
1047 /* Special registers */
1048 vmcs_write64(GUEST_IA32_DEBUGCTL
, 0);
1051 vmcs_write32_fixedbits(MSR_IA32_VMX_PINBASED_CTLS
,
1052 PIN_BASED_VM_EXEC_CONTROL
,
1053 PIN_BASED_EXT_INTR_MASK
/* 20.6.1 */
1054 | PIN_BASED_NMI_EXITING
/* 20.6.1 */
1056 vmcs_write32_fixedbits(MSR_IA32_VMX_PROCBASED_CTLS
,
1057 CPU_BASED_VM_EXEC_CONTROL
,
1058 CPU_BASED_HLT_EXITING
/* 20.6.2 */
1059 | CPU_BASED_CR8_LOAD_EXITING
/* 20.6.2 */
1060 | CPU_BASED_CR8_STORE_EXITING
/* 20.6.2 */
1061 | CPU_BASED_UNCOND_IO_EXITING
/* 20.6.2 */
1062 | CPU_BASED_MOV_DR_EXITING
1063 | CPU_BASED_USE_TSC_OFFSETING
/* 21.3 */
1066 vmcs_write32(EXCEPTION_BITMAP
, 1 << PF_VECTOR
);
1067 vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK
, 0);
1068 vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH
, 0);
1069 vmcs_write32(CR3_TARGET_COUNT
, 0); /* 22.2.1 */
1071 vmcs_writel(HOST_CR0
, read_cr0()); /* 22.2.3 */
1072 vmcs_writel(HOST_CR4
, read_cr4()); /* 22.2.3, 22.2.5 */
1073 vmcs_writel(HOST_CR3
, read_cr3()); /* 22.2.3 FIXME: shadow tables */
1075 vmcs_write16(HOST_CS_SELECTOR
, __KERNEL_CS
); /* 22.2.4 */
1076 vmcs_write16(HOST_DS_SELECTOR
, __KERNEL_DS
); /* 22.2.4 */
1077 vmcs_write16(HOST_ES_SELECTOR
, __KERNEL_DS
); /* 22.2.4 */
1078 vmcs_write16(HOST_FS_SELECTOR
, read_fs()); /* 22.2.4 */
1079 vmcs_write16(HOST_GS_SELECTOR
, read_gs()); /* 22.2.4 */
1080 vmcs_write16(HOST_SS_SELECTOR
, __KERNEL_DS
); /* 22.2.4 */
1081 #ifdef CONFIG_X86_64
1082 rdmsrl(MSR_FS_BASE
, a
);
1083 vmcs_writel(HOST_FS_BASE
, a
); /* 22.2.4 */
1084 rdmsrl(MSR_GS_BASE
, a
);
1085 vmcs_writel(HOST_GS_BASE
, a
); /* 22.2.4 */
1087 vmcs_writel(HOST_FS_BASE
, 0); /* 22.2.4 */
1088 vmcs_writel(HOST_GS_BASE
, 0); /* 22.2.4 */
1091 vmcs_write16(HOST_TR_SELECTOR
, GDT_ENTRY_TSS
*8); /* 22.2.4 */
1094 vmcs_writel(HOST_IDTR_BASE
, dt
.base
); /* 22.2.4 */
1097 vmcs_writel(HOST_RIP
, (unsigned long)kvm_vmx_return
); /* 22.2.5 */
1099 rdmsr(MSR_IA32_SYSENTER_CS
, host_sysenter_cs
, junk
);
1100 vmcs_write32(HOST_IA32_SYSENTER_CS
, host_sysenter_cs
);
1101 rdmsrl(MSR_IA32_SYSENTER_ESP
, a
);
1102 vmcs_writel(HOST_IA32_SYSENTER_ESP
, a
); /* 22.2.3 */
1103 rdmsrl(MSR_IA32_SYSENTER_EIP
, a
);
1104 vmcs_writel(HOST_IA32_SYSENTER_EIP
, a
); /* 22.2.3 */
1106 for (i
= 0; i
< NR_VMX_MSR
; ++i
) {
1107 u32 index
= vmx_msr_index
[i
];
1108 u32 data_low
, data_high
;
1110 int j
= vcpu
->nmsrs
;
1112 if (rdmsr_safe(index
, &data_low
, &data_high
) < 0)
1114 data
= data_low
| ((u64
)data_high
<< 32);
1115 vcpu
->host_msrs
[j
].index
= index
;
1116 vcpu
->host_msrs
[j
].reserved
= 0;
1117 vcpu
->host_msrs
[j
].data
= data
;
1118 vcpu
->guest_msrs
[j
] = vcpu
->host_msrs
[j
];
1121 printk(KERN_DEBUG
"kvm: msrs: %d\n", vcpu
->nmsrs
);
1123 nr_good_msrs
= vcpu
->nmsrs
- NR_BAD_MSRS
;
1124 vmcs_writel(VM_ENTRY_MSR_LOAD_ADDR
,
1125 virt_to_phys(vcpu
->guest_msrs
+ NR_BAD_MSRS
));
1126 vmcs_writel(VM_EXIT_MSR_STORE_ADDR
,
1127 virt_to_phys(vcpu
->guest_msrs
+ NR_BAD_MSRS
));
1128 vmcs_writel(VM_EXIT_MSR_LOAD_ADDR
,
1129 virt_to_phys(vcpu
->host_msrs
+ NR_BAD_MSRS
));
1130 vmcs_write32_fixedbits(MSR_IA32_VMX_EXIT_CTLS
, VM_EXIT_CONTROLS
,
1131 (HOST_IS_64
<< 9)); /* 22.2,1, 20.7.1 */
1132 vmcs_write32(VM_EXIT_MSR_STORE_COUNT
, nr_good_msrs
); /* 22.2.2 */
1133 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT
, nr_good_msrs
); /* 22.2.2 */
1134 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT
, nr_good_msrs
); /* 22.2.2 */
1137 /* 22.2.1, 20.8.1 */
1138 vmcs_write32_fixedbits(MSR_IA32_VMX_ENTRY_CTLS
,
1139 VM_ENTRY_CONTROLS
, 0);
1140 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD
, 0); /* 22.2.1 */
1142 #ifdef CONFIG_X86_64
1143 vmcs_writel(VIRTUAL_APIC_PAGE_ADDR
, 0);
1144 vmcs_writel(TPR_THRESHOLD
, 0);
1147 vmcs_writel(CR0_GUEST_HOST_MASK
, KVM_GUEST_CR0_MASK
);
1148 vmcs_writel(CR4_GUEST_HOST_MASK
, KVM_GUEST_CR4_MASK
);
1150 vcpu
->cr0
= 0x60000010;
1151 vmx_set_cr0(vcpu
, vcpu
->cr0
); // enter rmode
1152 vmx_set_cr4(vcpu
, 0);
1153 #ifdef CONFIG_X86_64
1154 vmx_set_efer(vcpu
, 0);
1163 static void inject_rmode_irq(struct kvm_vcpu
*vcpu
, int irq
)
1168 unsigned long flags
;
1169 unsigned long ss_base
= vmcs_readl(GUEST_SS_BASE
);
1170 u16 sp
= vmcs_readl(GUEST_RSP
);
1171 u32 ss_limit
= vmcs_read32(GUEST_SS_LIMIT
);
1173 if (sp
> ss_limit
|| sp
- 6 > sp
) {
1174 vcpu_printf(vcpu
, "%s: #SS, rsp 0x%lx ss 0x%lx limit 0x%x\n",
1176 vmcs_readl(GUEST_RSP
),
1177 vmcs_readl(GUEST_SS_BASE
),
1178 vmcs_read32(GUEST_SS_LIMIT
));
1182 if (kvm_read_guest(vcpu
, irq
* sizeof(ent
), sizeof(ent
), &ent
) !=
1184 vcpu_printf(vcpu
, "%s: read guest err\n", __FUNCTION__
);
1188 flags
= vmcs_readl(GUEST_RFLAGS
);
1189 cs
= vmcs_readl(GUEST_CS_BASE
) >> 4;
1190 ip
= vmcs_readl(GUEST_RIP
);
1193 if (kvm_write_guest(vcpu
, ss_base
+ sp
- 2, 2, &flags
) != 2 ||
1194 kvm_write_guest(vcpu
, ss_base
+ sp
- 4, 2, &cs
) != 2 ||
1195 kvm_write_guest(vcpu
, ss_base
+ sp
- 6, 2, &ip
) != 2) {
1196 vcpu_printf(vcpu
, "%s: write guest err\n", __FUNCTION__
);
1200 vmcs_writel(GUEST_RFLAGS
, flags
&
1201 ~( X86_EFLAGS_IF
| X86_EFLAGS_AC
| X86_EFLAGS_TF
));
1202 vmcs_write16(GUEST_CS_SELECTOR
, ent
[1]) ;
1203 vmcs_writel(GUEST_CS_BASE
, ent
[1] << 4);
1204 vmcs_writel(GUEST_RIP
, ent
[0]);
1205 vmcs_writel(GUEST_RSP
, (vmcs_readl(GUEST_RSP
) & ~0xffff) | (sp
- 6));
1208 static void kvm_do_inject_irq(struct kvm_vcpu
*vcpu
)
1210 int word_index
= __ffs(vcpu
->irq_summary
);
1211 int bit_index
= __ffs(vcpu
->irq_pending
[word_index
]);
1212 int irq
= word_index
* BITS_PER_LONG
+ bit_index
;
1214 clear_bit(bit_index
, &vcpu
->irq_pending
[word_index
]);
1215 if (!vcpu
->irq_pending
[word_index
])
1216 clear_bit(word_index
, &vcpu
->irq_summary
);
1218 if (vcpu
->rmode
.active
) {
1219 inject_rmode_irq(vcpu
, irq
);
1222 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD
,
1223 irq
| INTR_TYPE_EXT_INTR
| INTR_INFO_VALID_MASK
);
1227 static void do_interrupt_requests(struct kvm_vcpu
*vcpu
,
1228 struct kvm_run
*kvm_run
)
1230 u32 cpu_based_vm_exec_control
;
1232 vcpu
->interrupt_window_open
=
1233 ((vmcs_readl(GUEST_RFLAGS
) & X86_EFLAGS_IF
) &&
1234 (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO
) & 3) == 0);
1236 if (vcpu
->interrupt_window_open
&&
1237 vcpu
->irq_summary
&&
1238 !(vmcs_read32(VM_ENTRY_INTR_INFO_FIELD
) & INTR_INFO_VALID_MASK
))
1240 * If interrupts enabled, and not blocked by sti or mov ss. Good.
1242 kvm_do_inject_irq(vcpu
);
1244 cpu_based_vm_exec_control
= vmcs_read32(CPU_BASED_VM_EXEC_CONTROL
);
1245 if (!vcpu
->interrupt_window_open
&&
1246 (vcpu
->irq_summary
|| kvm_run
->request_interrupt_window
))
1248 * Interrupts blocked. Wait for unblock.
1250 cpu_based_vm_exec_control
|= CPU_BASED_VIRTUAL_INTR_PENDING
;
1252 cpu_based_vm_exec_control
&= ~CPU_BASED_VIRTUAL_INTR_PENDING
;
1253 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL
, cpu_based_vm_exec_control
);
1256 static void kvm_guest_debug_pre(struct kvm_vcpu
*vcpu
)
1258 struct kvm_guest_debug
*dbg
= &vcpu
->guest_debug
;
1260 set_debugreg(dbg
->bp
[0], 0);
1261 set_debugreg(dbg
->bp
[1], 1);
1262 set_debugreg(dbg
->bp
[2], 2);
1263 set_debugreg(dbg
->bp
[3], 3);
1265 if (dbg
->singlestep
) {
1266 unsigned long flags
;
1268 flags
= vmcs_readl(GUEST_RFLAGS
);
1269 flags
|= X86_EFLAGS_TF
| X86_EFLAGS_RF
;
1270 vmcs_writel(GUEST_RFLAGS
, flags
);
1274 static int handle_rmode_exception(struct kvm_vcpu
*vcpu
,
1275 int vec
, u32 err_code
)
1277 if (!vcpu
->rmode
.active
)
1280 if (vec
== GP_VECTOR
&& err_code
== 0)
1281 if (emulate_instruction(vcpu
, NULL
, 0, 0) == EMULATE_DONE
)
1286 static int handle_exception(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
1288 u32 intr_info
, error_code
;
1289 unsigned long cr2
, rip
;
1291 enum emulation_result er
;
1294 vect_info
= vmcs_read32(IDT_VECTORING_INFO_FIELD
);
1295 intr_info
= vmcs_read32(VM_EXIT_INTR_INFO
);
1297 if ((vect_info
& VECTORING_INFO_VALID_MASK
) &&
1298 !is_page_fault(intr_info
)) {
1299 printk(KERN_ERR
"%s: unexpected, vectoring info 0x%x "
1300 "intr info 0x%x\n", __FUNCTION__
, vect_info
, intr_info
);
1303 if (is_external_interrupt(vect_info
)) {
1304 int irq
= vect_info
& VECTORING_INFO_VECTOR_MASK
;
1305 set_bit(irq
, vcpu
->irq_pending
);
1306 set_bit(irq
/ BITS_PER_LONG
, &vcpu
->irq_summary
);
1309 if ((intr_info
& INTR_INFO_INTR_TYPE_MASK
) == 0x200) { /* nmi */
1314 rip
= vmcs_readl(GUEST_RIP
);
1315 if (intr_info
& INTR_INFO_DELIEVER_CODE_MASK
)
1316 error_code
= vmcs_read32(VM_EXIT_INTR_ERROR_CODE
);
1317 if (is_page_fault(intr_info
)) {
1318 cr2
= vmcs_readl(EXIT_QUALIFICATION
);
1320 spin_lock(&vcpu
->kvm
->lock
);
1321 r
= kvm_mmu_page_fault(vcpu
, cr2
, error_code
);
1323 spin_unlock(&vcpu
->kvm
->lock
);
1327 spin_unlock(&vcpu
->kvm
->lock
);
1331 er
= emulate_instruction(vcpu
, kvm_run
, cr2
, error_code
);
1332 spin_unlock(&vcpu
->kvm
->lock
);
1337 case EMULATE_DO_MMIO
:
1338 ++kvm_stat
.mmio_exits
;
1339 kvm_run
->exit_reason
= KVM_EXIT_MMIO
;
1342 vcpu_printf(vcpu
, "%s: emulate fail\n", __FUNCTION__
);
1349 if (vcpu
->rmode
.active
&&
1350 handle_rmode_exception(vcpu
, intr_info
& INTR_INFO_VECTOR_MASK
,
1354 if ((intr_info
& (INTR_INFO_INTR_TYPE_MASK
| INTR_INFO_VECTOR_MASK
)) == (INTR_TYPE_EXCEPTION
| 1)) {
1355 kvm_run
->exit_reason
= KVM_EXIT_DEBUG
;
1358 kvm_run
->exit_reason
= KVM_EXIT_EXCEPTION
;
1359 kvm_run
->ex
.exception
= intr_info
& INTR_INFO_VECTOR_MASK
;
1360 kvm_run
->ex
.error_code
= error_code
;
1364 static int handle_external_interrupt(struct kvm_vcpu
*vcpu
,
1365 struct kvm_run
*kvm_run
)
1367 ++kvm_stat
.irq_exits
;
1372 static int get_io_count(struct kvm_vcpu
*vcpu
, u64
*count
)
1379 if ((vmcs_readl(GUEST_RFLAGS
) & X86_EFLAGS_VM
)) {
1382 u32 cs_ar
= vmcs_read32(GUEST_CS_AR_BYTES
);
1384 countr_size
= (cs_ar
& AR_L_MASK
) ? 8:
1385 (cs_ar
& AR_DB_MASK
) ? 4: 2;
1388 rip
= vmcs_readl(GUEST_RIP
);
1389 if (countr_size
!= 8)
1390 rip
+= vmcs_readl(GUEST_CS_BASE
);
1392 n
= kvm_read_guest(vcpu
, rip
, sizeof(inst
), &inst
);
1394 for (i
= 0; i
< n
; i
++) {
1395 switch (((u8
*)&inst
)[i
]) {
1408 countr_size
= (countr_size
== 2) ? 4: (countr_size
>> 1);
1416 *count
= vcpu
->regs
[VCPU_REGS_RCX
] & (~0ULL >> (64 - countr_size
));
1420 static int handle_io(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
1422 u64 exit_qualification
;
1424 ++kvm_stat
.io_exits
;
1425 exit_qualification
= vmcs_read64(EXIT_QUALIFICATION
);
1426 kvm_run
->exit_reason
= KVM_EXIT_IO
;
1427 if (exit_qualification
& 8)
1428 kvm_run
->io
.direction
= KVM_EXIT_IO_IN
;
1430 kvm_run
->io
.direction
= KVM_EXIT_IO_OUT
;
1431 kvm_run
->io
.size
= (exit_qualification
& 7) + 1;
1432 kvm_run
->io
.string
= (exit_qualification
& 16) != 0;
1433 kvm_run
->io
.string_down
1434 = (vmcs_readl(GUEST_RFLAGS
) & X86_EFLAGS_DF
) != 0;
1435 kvm_run
->io
.rep
= (exit_qualification
& 32) != 0;
1436 kvm_run
->io
.port
= exit_qualification
>> 16;
1437 if (kvm_run
->io
.string
) {
1438 if (!get_io_count(vcpu
, &kvm_run
->io
.count
))
1440 kvm_run
->io
.address
= vmcs_readl(GUEST_LINEAR_ADDRESS
);
1442 kvm_run
->io
.value
= vcpu
->regs
[VCPU_REGS_RAX
]; /* rax */
1446 static int handle_cr(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
1448 u64 exit_qualification
;
1452 exit_qualification
= vmcs_read64(EXIT_QUALIFICATION
);
1453 cr
= exit_qualification
& 15;
1454 reg
= (exit_qualification
>> 8) & 15;
1455 switch ((exit_qualification
>> 4) & 3) {
1456 case 0: /* mov to cr */
1459 vcpu_load_rsp_rip(vcpu
);
1460 set_cr0(vcpu
, vcpu
->regs
[reg
]);
1461 skip_emulated_instruction(vcpu
);
1464 vcpu_load_rsp_rip(vcpu
);
1465 set_cr3(vcpu
, vcpu
->regs
[reg
]);
1466 skip_emulated_instruction(vcpu
);
1469 vcpu_load_rsp_rip(vcpu
);
1470 set_cr4(vcpu
, vcpu
->regs
[reg
]);
1471 skip_emulated_instruction(vcpu
);
1474 vcpu_load_rsp_rip(vcpu
);
1475 set_cr8(vcpu
, vcpu
->regs
[reg
]);
1476 skip_emulated_instruction(vcpu
);
1480 case 1: /*mov from cr*/
1483 vcpu_load_rsp_rip(vcpu
);
1484 vcpu
->regs
[reg
] = vcpu
->cr3
;
1485 vcpu_put_rsp_rip(vcpu
);
1486 skip_emulated_instruction(vcpu
);
1489 printk(KERN_DEBUG
"handle_cr: read CR8 "
1490 "cpu erratum AA15\n");
1491 vcpu_load_rsp_rip(vcpu
);
1492 vcpu
->regs
[reg
] = vcpu
->cr8
;
1493 vcpu_put_rsp_rip(vcpu
);
1494 skip_emulated_instruction(vcpu
);
1499 lmsw(vcpu
, (exit_qualification
>> LMSW_SOURCE_DATA_SHIFT
) & 0x0f);
1501 skip_emulated_instruction(vcpu
);
1506 kvm_run
->exit_reason
= 0;
1507 printk(KERN_ERR
"kvm: unhandled control register: op %d cr %d\n",
1508 (int)(exit_qualification
>> 4) & 3, cr
);
1512 static int handle_dr(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
1514 u64 exit_qualification
;
1519 * FIXME: this code assumes the host is debugging the guest.
1520 * need to deal with guest debugging itself too.
1522 exit_qualification
= vmcs_read64(EXIT_QUALIFICATION
);
1523 dr
= exit_qualification
& 7;
1524 reg
= (exit_qualification
>> 8) & 15;
1525 vcpu_load_rsp_rip(vcpu
);
1526 if (exit_qualification
& 16) {
1538 vcpu
->regs
[reg
] = val
;
1542 vcpu_put_rsp_rip(vcpu
);
1543 skip_emulated_instruction(vcpu
);
1547 static int handle_cpuid(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
1549 kvm_run
->exit_reason
= KVM_EXIT_CPUID
;
1553 static int handle_rdmsr(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
1555 u32 ecx
= vcpu
->regs
[VCPU_REGS_RCX
];
1558 if (vmx_get_msr(vcpu
, ecx
, &data
)) {
1559 vmx_inject_gp(vcpu
, 0);
1563 /* FIXME: handling of bits 32:63 of rax, rdx */
1564 vcpu
->regs
[VCPU_REGS_RAX
] = data
& -1u;
1565 vcpu
->regs
[VCPU_REGS_RDX
] = (data
>> 32) & -1u;
1566 skip_emulated_instruction(vcpu
);
1570 static int handle_wrmsr(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
1572 u32 ecx
= vcpu
->regs
[VCPU_REGS_RCX
];
1573 u64 data
= (vcpu
->regs
[VCPU_REGS_RAX
] & -1u)
1574 | ((u64
)(vcpu
->regs
[VCPU_REGS_RDX
] & -1u) << 32);
1576 if (vmx_set_msr(vcpu
, ecx
, data
) != 0) {
1577 vmx_inject_gp(vcpu
, 0);
1581 skip_emulated_instruction(vcpu
);
1585 static void post_kvm_run_save(struct kvm_vcpu
*vcpu
,
1586 struct kvm_run
*kvm_run
)
1588 kvm_run
->if_flag
= (vmcs_readl(GUEST_RFLAGS
) & X86_EFLAGS_IF
) != 0;
1589 kvm_run
->cr8
= vcpu
->cr8
;
1590 kvm_run
->apic_base
= vcpu
->apic_base
;
1591 kvm_run
->ready_for_interrupt_injection
= (vcpu
->interrupt_window_open
&&
1592 vcpu
->irq_summary
== 0);
1595 static int handle_interrupt_window(struct kvm_vcpu
*vcpu
,
1596 struct kvm_run
*kvm_run
)
1599 * If the user space waits to inject interrupts, exit as soon as
1602 if (kvm_run
->request_interrupt_window
&&
1603 !vcpu
->irq_summary
&&
1604 (vmcs_readl(GUEST_RFLAGS
) & X86_EFLAGS_IF
)) {
1605 kvm_run
->exit_reason
= KVM_EXIT_IRQ_WINDOW_OPEN
;
1606 ++kvm_stat
.irq_window_exits
;
1612 static int handle_halt(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
1614 skip_emulated_instruction(vcpu
);
1615 if (vcpu
->irq_summary
)
1618 kvm_run
->exit_reason
= KVM_EXIT_HLT
;
1619 ++kvm_stat
.halt_exits
;
1624 * The exit handlers return 1 if the exit was handled fully and guest execution
1625 * may resume. Otherwise they set the kvm_run parameter to indicate what needs
1626 * to be done to userspace and return 0.
1628 static int (*kvm_vmx_exit_handlers
[])(struct kvm_vcpu
*vcpu
,
1629 struct kvm_run
*kvm_run
) = {
1630 [EXIT_REASON_EXCEPTION_NMI
] = handle_exception
,
1631 [EXIT_REASON_EXTERNAL_INTERRUPT
] = handle_external_interrupt
,
1632 [EXIT_REASON_IO_INSTRUCTION
] = handle_io
,
1633 [EXIT_REASON_CR_ACCESS
] = handle_cr
,
1634 [EXIT_REASON_DR_ACCESS
] = handle_dr
,
1635 [EXIT_REASON_CPUID
] = handle_cpuid
,
1636 [EXIT_REASON_MSR_READ
] = handle_rdmsr
,
1637 [EXIT_REASON_MSR_WRITE
] = handle_wrmsr
,
1638 [EXIT_REASON_PENDING_INTERRUPT
] = handle_interrupt_window
,
1639 [EXIT_REASON_HLT
] = handle_halt
,
1642 static const int kvm_vmx_max_exit_handlers
=
1643 sizeof(kvm_vmx_exit_handlers
) / sizeof(*kvm_vmx_exit_handlers
);
1646 * The guest has exited. See if we can fix it or if we need userspace
1649 static int kvm_handle_exit(struct kvm_run
*kvm_run
, struct kvm_vcpu
*vcpu
)
1651 u32 vectoring_info
= vmcs_read32(IDT_VECTORING_INFO_FIELD
);
1652 u32 exit_reason
= vmcs_read32(VM_EXIT_REASON
);
1654 if ( (vectoring_info
& VECTORING_INFO_VALID_MASK
) &&
1655 exit_reason
!= EXIT_REASON_EXCEPTION_NMI
)
1656 printk(KERN_WARNING
"%s: unexpected, valid vectoring info and "
1657 "exit reason is 0x%x\n", __FUNCTION__
, exit_reason
);
1658 kvm_run
->instruction_length
= vmcs_read32(VM_EXIT_INSTRUCTION_LEN
);
1659 if (exit_reason
< kvm_vmx_max_exit_handlers
1660 && kvm_vmx_exit_handlers
[exit_reason
])
1661 return kvm_vmx_exit_handlers
[exit_reason
](vcpu
, kvm_run
);
1663 kvm_run
->exit_reason
= KVM_EXIT_UNKNOWN
;
1664 kvm_run
->hw
.hardware_exit_reason
= exit_reason
;
1670 * Check if userspace requested an interrupt window, and that the
1671 * interrupt window is open.
1673 * No need to exit to userspace if we already have an interrupt queued.
1675 static int dm_request_for_irq_injection(struct kvm_vcpu
*vcpu
,
1676 struct kvm_run
*kvm_run
)
1678 return (!vcpu
->irq_summary
&&
1679 kvm_run
->request_interrupt_window
&&
1680 vcpu
->interrupt_window_open
&&
1681 (vmcs_readl(GUEST_RFLAGS
) & X86_EFLAGS_IF
));
1684 static int vmx_vcpu_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
1687 u16 fs_sel
, gs_sel
, ldt_sel
;
1688 int fs_gs_ldt_reload_needed
;
1693 * Set host fs and gs selectors. Unfortunately, 22.2.3 does not
1694 * allow segment selectors with cpl > 0 or ti == 1.
1698 ldt_sel
= read_ldt();
1699 fs_gs_ldt_reload_needed
= (fs_sel
& 7) | (gs_sel
& 7) | ldt_sel
;
1700 if (!fs_gs_ldt_reload_needed
) {
1701 vmcs_write16(HOST_FS_SELECTOR
, fs_sel
);
1702 vmcs_write16(HOST_GS_SELECTOR
, gs_sel
);
1704 vmcs_write16(HOST_FS_SELECTOR
, 0);
1705 vmcs_write16(HOST_GS_SELECTOR
, 0);
1708 #ifdef CONFIG_X86_64
1709 vmcs_writel(HOST_FS_BASE
, read_msr(MSR_FS_BASE
));
1710 vmcs_writel(HOST_GS_BASE
, read_msr(MSR_GS_BASE
));
1712 vmcs_writel(HOST_FS_BASE
, segment_base(fs_sel
));
1713 vmcs_writel(HOST_GS_BASE
, segment_base(gs_sel
));
1716 do_interrupt_requests(vcpu
, kvm_run
);
1718 if (vcpu
->guest_debug
.enabled
)
1719 kvm_guest_debug_pre(vcpu
);
1721 fx_save(vcpu
->host_fx_image
);
1722 fx_restore(vcpu
->guest_fx_image
);
1724 save_msrs(vcpu
->host_msrs
, vcpu
->nmsrs
);
1725 load_msrs(vcpu
->guest_msrs
, NR_BAD_MSRS
);
1728 /* Store host registers */
1730 #ifdef CONFIG_X86_64
1731 "push %%rax; push %%rbx; push %%rdx;"
1732 "push %%rsi; push %%rdi; push %%rbp;"
1733 "push %%r8; push %%r9; push %%r10; push %%r11;"
1734 "push %%r12; push %%r13; push %%r14; push %%r15;"
1736 ASM_VMX_VMWRITE_RSP_RDX
"\n\t"
1738 "pusha; push %%ecx \n\t"
1739 ASM_VMX_VMWRITE_RSP_RDX
"\n\t"
1741 /* Check if vmlaunch of vmresume is needed */
1743 /* Load guest registers. Don't clobber flags. */
1744 #ifdef CONFIG_X86_64
1745 "mov %c[cr2](%3), %%rax \n\t"
1746 "mov %%rax, %%cr2 \n\t"
1747 "mov %c[rax](%3), %%rax \n\t"
1748 "mov %c[rbx](%3), %%rbx \n\t"
1749 "mov %c[rdx](%3), %%rdx \n\t"
1750 "mov %c[rsi](%3), %%rsi \n\t"
1751 "mov %c[rdi](%3), %%rdi \n\t"
1752 "mov %c[rbp](%3), %%rbp \n\t"
1753 "mov %c[r8](%3), %%r8 \n\t"
1754 "mov %c[r9](%3), %%r9 \n\t"
1755 "mov %c[r10](%3), %%r10 \n\t"
1756 "mov %c[r11](%3), %%r11 \n\t"
1757 "mov %c[r12](%3), %%r12 \n\t"
1758 "mov %c[r13](%3), %%r13 \n\t"
1759 "mov %c[r14](%3), %%r14 \n\t"
1760 "mov %c[r15](%3), %%r15 \n\t"
1761 "mov %c[rcx](%3), %%rcx \n\t" /* kills %3 (rcx) */
1763 "mov %c[cr2](%3), %%eax \n\t"
1764 "mov %%eax, %%cr2 \n\t"
1765 "mov %c[rax](%3), %%eax \n\t"
1766 "mov %c[rbx](%3), %%ebx \n\t"
1767 "mov %c[rdx](%3), %%edx \n\t"
1768 "mov %c[rsi](%3), %%esi \n\t"
1769 "mov %c[rdi](%3), %%edi \n\t"
1770 "mov %c[rbp](%3), %%ebp \n\t"
1771 "mov %c[rcx](%3), %%ecx \n\t" /* kills %3 (ecx) */
1773 /* Enter guest mode */
1775 ASM_VMX_VMLAUNCH
"\n\t"
1776 "jmp kvm_vmx_return \n\t"
1777 "launched: " ASM_VMX_VMRESUME
"\n\t"
1778 ".globl kvm_vmx_return \n\t"
1780 /* Save guest registers, load host registers, keep flags */
1781 #ifdef CONFIG_X86_64
1782 "xchg %3, 0(%%rsp) \n\t"
1783 "mov %%rax, %c[rax](%3) \n\t"
1784 "mov %%rbx, %c[rbx](%3) \n\t"
1785 "pushq 0(%%rsp); popq %c[rcx](%3) \n\t"
1786 "mov %%rdx, %c[rdx](%3) \n\t"
1787 "mov %%rsi, %c[rsi](%3) \n\t"
1788 "mov %%rdi, %c[rdi](%3) \n\t"
1789 "mov %%rbp, %c[rbp](%3) \n\t"
1790 "mov %%r8, %c[r8](%3) \n\t"
1791 "mov %%r9, %c[r9](%3) \n\t"
1792 "mov %%r10, %c[r10](%3) \n\t"
1793 "mov %%r11, %c[r11](%3) \n\t"
1794 "mov %%r12, %c[r12](%3) \n\t"
1795 "mov %%r13, %c[r13](%3) \n\t"
1796 "mov %%r14, %c[r14](%3) \n\t"
1797 "mov %%r15, %c[r15](%3) \n\t"
1798 "mov %%cr2, %%rax \n\t"
1799 "mov %%rax, %c[cr2](%3) \n\t"
1800 "mov 0(%%rsp), %3 \n\t"
1802 "pop %%rcx; pop %%r15; pop %%r14; pop %%r13; pop %%r12;"
1803 "pop %%r11; pop %%r10; pop %%r9; pop %%r8;"
1804 "pop %%rbp; pop %%rdi; pop %%rsi;"
1805 "pop %%rdx; pop %%rbx; pop %%rax \n\t"
1807 "xchg %3, 0(%%esp) \n\t"
1808 "mov %%eax, %c[rax](%3) \n\t"
1809 "mov %%ebx, %c[rbx](%3) \n\t"
1810 "pushl 0(%%esp); popl %c[rcx](%3) \n\t"
1811 "mov %%edx, %c[rdx](%3) \n\t"
1812 "mov %%esi, %c[rsi](%3) \n\t"
1813 "mov %%edi, %c[rdi](%3) \n\t"
1814 "mov %%ebp, %c[rbp](%3) \n\t"
1815 "mov %%cr2, %%eax \n\t"
1816 "mov %%eax, %c[cr2](%3) \n\t"
1817 "mov 0(%%esp), %3 \n\t"
1819 "pop %%ecx; popa \n\t"
1824 : "r"(vcpu
->launched
), "d"((unsigned long)HOST_RSP
),
1826 [rax
]"i"(offsetof(struct kvm_vcpu
, regs
[VCPU_REGS_RAX
])),
1827 [rbx
]"i"(offsetof(struct kvm_vcpu
, regs
[VCPU_REGS_RBX
])),
1828 [rcx
]"i"(offsetof(struct kvm_vcpu
, regs
[VCPU_REGS_RCX
])),
1829 [rdx
]"i"(offsetof(struct kvm_vcpu
, regs
[VCPU_REGS_RDX
])),
1830 [rsi
]"i"(offsetof(struct kvm_vcpu
, regs
[VCPU_REGS_RSI
])),
1831 [rdi
]"i"(offsetof(struct kvm_vcpu
, regs
[VCPU_REGS_RDI
])),
1832 [rbp
]"i"(offsetof(struct kvm_vcpu
, regs
[VCPU_REGS_RBP
])),
1833 #ifdef CONFIG_X86_64
1834 [r8
]"i"(offsetof(struct kvm_vcpu
, regs
[VCPU_REGS_R8
])),
1835 [r9
]"i"(offsetof(struct kvm_vcpu
, regs
[VCPU_REGS_R9
])),
1836 [r10
]"i"(offsetof(struct kvm_vcpu
, regs
[VCPU_REGS_R10
])),
1837 [r11
]"i"(offsetof(struct kvm_vcpu
, regs
[VCPU_REGS_R11
])),
1838 [r12
]"i"(offsetof(struct kvm_vcpu
, regs
[VCPU_REGS_R12
])),
1839 [r13
]"i"(offsetof(struct kvm_vcpu
, regs
[VCPU_REGS_R13
])),
1840 [r14
]"i"(offsetof(struct kvm_vcpu
, regs
[VCPU_REGS_R14
])),
1841 [r15
]"i"(offsetof(struct kvm_vcpu
, regs
[VCPU_REGS_R15
])),
1843 [cr2
]"i"(offsetof(struct kvm_vcpu
, cr2
))
1848 save_msrs(vcpu
->guest_msrs
, NR_BAD_MSRS
);
1849 load_msrs(vcpu
->host_msrs
, NR_BAD_MSRS
);
1851 fx_save(vcpu
->guest_fx_image
);
1852 fx_restore(vcpu
->host_fx_image
);
1853 vcpu
->interrupt_window_open
= (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO
) & 3) == 0;
1855 #ifndef CONFIG_X86_64
1856 asm ("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS
));
1859 kvm_run
->exit_type
= 0;
1861 kvm_run
->exit_type
= KVM_EXIT_TYPE_FAIL_ENTRY
;
1862 kvm_run
->exit_reason
= vmcs_read32(VM_INSTRUCTION_ERROR
);
1865 if (fs_gs_ldt_reload_needed
) {
1869 * If we have to reload gs, we must take care to
1870 * preserve our gs base.
1872 local_irq_disable();
1874 #ifdef CONFIG_X86_64
1875 wrmsrl(MSR_GS_BASE
, vmcs_readl(HOST_GS_BASE
));
1882 kvm_run
->exit_type
= KVM_EXIT_TYPE_VM_EXIT
;
1883 r
= kvm_handle_exit(kvm_run
, vcpu
);
1885 /* Give scheduler a change to reschedule. */
1886 if (signal_pending(current
)) {
1887 ++kvm_stat
.signal_exits
;
1888 post_kvm_run_save(vcpu
, kvm_run
);
1892 if (dm_request_for_irq_injection(vcpu
, kvm_run
)) {
1893 ++kvm_stat
.request_irq_exits
;
1894 post_kvm_run_save(vcpu
, kvm_run
);
1903 post_kvm_run_save(vcpu
, kvm_run
);
1907 static void vmx_flush_tlb(struct kvm_vcpu
*vcpu
)
1909 vmcs_writel(GUEST_CR3
, vmcs_readl(GUEST_CR3
));
1912 static void vmx_inject_page_fault(struct kvm_vcpu
*vcpu
,
1916 u32 vect_info
= vmcs_read32(IDT_VECTORING_INFO_FIELD
);
1918 ++kvm_stat
.pf_guest
;
1920 if (is_page_fault(vect_info
)) {
1921 printk(KERN_DEBUG
"inject_page_fault: "
1922 "double fault 0x%lx @ 0x%lx\n",
1923 addr
, vmcs_readl(GUEST_RIP
));
1924 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE
, 0);
1925 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD
,
1927 INTR_TYPE_EXCEPTION
|
1928 INTR_INFO_DELIEVER_CODE_MASK
|
1929 INTR_INFO_VALID_MASK
);
1933 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE
, err_code
);
1934 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD
,
1936 INTR_TYPE_EXCEPTION
|
1937 INTR_INFO_DELIEVER_CODE_MASK
|
1938 INTR_INFO_VALID_MASK
);
1942 static void vmx_free_vmcs(struct kvm_vcpu
*vcpu
)
1945 on_each_cpu(__vcpu_clear
, vcpu
, 0, 1);
1946 free_vmcs(vcpu
->vmcs
);
1951 static void vmx_free_vcpu(struct kvm_vcpu
*vcpu
)
1953 vmx_free_vmcs(vcpu
);
1956 static int vmx_create_vcpu(struct kvm_vcpu
*vcpu
)
1960 vcpu
->guest_msrs
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
1961 if (!vcpu
->guest_msrs
)
1964 vcpu
->host_msrs
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
1965 if (!vcpu
->host_msrs
)
1966 goto out_free_guest_msrs
;
1968 vmcs
= alloc_vmcs();
1979 kfree(vcpu
->host_msrs
);
1980 vcpu
->host_msrs
= NULL
;
1982 out_free_guest_msrs
:
1983 kfree(vcpu
->guest_msrs
);
1984 vcpu
->guest_msrs
= NULL
;
1989 static struct kvm_arch_ops vmx_arch_ops
= {
1990 .cpu_has_kvm_support
= cpu_has_kvm_support
,
1991 .disabled_by_bios
= vmx_disabled_by_bios
,
1992 .hardware_setup
= hardware_setup
,
1993 .hardware_unsetup
= hardware_unsetup
,
1994 .hardware_enable
= hardware_enable
,
1995 .hardware_disable
= hardware_disable
,
1997 .vcpu_create
= vmx_create_vcpu
,
1998 .vcpu_free
= vmx_free_vcpu
,
2000 .vcpu_load
= vmx_vcpu_load
,
2001 .vcpu_put
= vmx_vcpu_put
,
2003 .set_guest_debug
= set_guest_debug
,
2004 .get_msr
= vmx_get_msr
,
2005 .set_msr
= vmx_set_msr
,
2006 .get_segment_base
= vmx_get_segment_base
,
2007 .get_segment
= vmx_get_segment
,
2008 .set_segment
= vmx_set_segment
,
2009 .get_cs_db_l_bits
= vmx_get_cs_db_l_bits
,
2010 .decache_cr0_cr4_guest_bits
= vmx_decache_cr0_cr4_guest_bits
,
2011 .set_cr0
= vmx_set_cr0
,
2012 .set_cr0_no_modeswitch
= vmx_set_cr0_no_modeswitch
,
2013 .set_cr3
= vmx_set_cr3
,
2014 .set_cr4
= vmx_set_cr4
,
2015 #ifdef CONFIG_X86_64
2016 .set_efer
= vmx_set_efer
,
2018 .get_idt
= vmx_get_idt
,
2019 .set_idt
= vmx_set_idt
,
2020 .get_gdt
= vmx_get_gdt
,
2021 .set_gdt
= vmx_set_gdt
,
2022 .cache_regs
= vcpu_load_rsp_rip
,
2023 .decache_regs
= vcpu_put_rsp_rip
,
2024 .get_rflags
= vmx_get_rflags
,
2025 .set_rflags
= vmx_set_rflags
,
2027 .tlb_flush
= vmx_flush_tlb
,
2028 .inject_page_fault
= vmx_inject_page_fault
,
2030 .inject_gp
= vmx_inject_gp
,
2032 .run
= vmx_vcpu_run
,
2033 .skip_emulated_instruction
= skip_emulated_instruction
,
2034 .vcpu_setup
= vmx_vcpu_setup
,
2037 static int __init
vmx_init(void)
2039 return kvm_init_arch(&vmx_arch_ops
, THIS_MODULE
);
2042 static void __exit
vmx_exit(void)
2047 module_init(vmx_init
)
2048 module_exit(vmx_exit
)