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/kvm_host.h>
22 #include <linux/module.h>
23 #include <linux/kernel.h>
25 #include <linux/highmem.h>
26 #include <linux/sched.h>
27 #include <linux/moduleparam.h>
28 #include "kvm_cache_regs.h"
34 #include <asm/virtext.h>
36 #define __ex(x) __kvm_handle_fault_on_reboot(x)
38 MODULE_AUTHOR("Qumranet");
39 MODULE_LICENSE("GPL");
41 static int bypass_guest_pf
= 1;
42 module_param(bypass_guest_pf
, bool, 0);
44 static int enable_vpid
= 1;
45 module_param(enable_vpid
, bool, 0);
47 static int flexpriority_enabled
= 1;
48 module_param(flexpriority_enabled
, bool, 0);
50 static int enable_ept
= 1;
51 module_param(enable_ept
, bool, 0);
53 static int emulate_invalid_guest_state
= 0;
54 module_param(emulate_invalid_guest_state
, bool, 0);
64 struct list_head local_vcpus_link
;
65 unsigned long host_rsp
;
68 u32 idt_vectoring_info
;
69 struct kvm_msr_entry
*guest_msrs
;
70 struct kvm_msr_entry
*host_msrs
;
75 int msr_offset_kernel_gs_base
;
80 u16 fs_sel
, gs_sel
, ldt_sel
;
81 int gs_ldt_reload_needed
;
83 int guest_efer_loaded
;
93 bool emulation_required
;
94 enum emulation_result invalid_state_emulation_result
;
96 /* Support for vnmi-less CPUs */
97 int soft_vnmi_blocked
;
99 s64 vnmi_blocked_time
;
102 static inline struct vcpu_vmx
*to_vmx(struct kvm_vcpu
*vcpu
)
104 return container_of(vcpu
, struct vcpu_vmx
, vcpu
);
107 static int init_rmode(struct kvm
*kvm
);
108 static u64
construct_eptp(unsigned long root_hpa
);
110 static DEFINE_PER_CPU(struct vmcs
*, vmxarea
);
111 static DEFINE_PER_CPU(struct vmcs
*, current_vmcs
);
112 static DEFINE_PER_CPU(struct list_head
, vcpus_on_cpu
);
114 static struct page
*vmx_io_bitmap_a
;
115 static struct page
*vmx_io_bitmap_b
;
116 static struct page
*vmx_msr_bitmap
;
118 static DECLARE_BITMAP(vmx_vpid_bitmap
, VMX_NR_VPIDS
);
119 static DEFINE_SPINLOCK(vmx_vpid_lock
);
121 static struct vmcs_config
{
125 u32 pin_based_exec_ctrl
;
126 u32 cpu_based_exec_ctrl
;
127 u32 cpu_based_2nd_exec_ctrl
;
132 static struct vmx_capability
{
137 #define VMX_SEGMENT_FIELD(seg) \
138 [VCPU_SREG_##seg] = { \
139 .selector = GUEST_##seg##_SELECTOR, \
140 .base = GUEST_##seg##_BASE, \
141 .limit = GUEST_##seg##_LIMIT, \
142 .ar_bytes = GUEST_##seg##_AR_BYTES, \
145 static struct kvm_vmx_segment_field
{
150 } kvm_vmx_segment_fields
[] = {
151 VMX_SEGMENT_FIELD(CS
),
152 VMX_SEGMENT_FIELD(DS
),
153 VMX_SEGMENT_FIELD(ES
),
154 VMX_SEGMENT_FIELD(FS
),
155 VMX_SEGMENT_FIELD(GS
),
156 VMX_SEGMENT_FIELD(SS
),
157 VMX_SEGMENT_FIELD(TR
),
158 VMX_SEGMENT_FIELD(LDTR
),
162 * Keep MSR_K6_STAR at the end, as setup_msrs() will try to optimize it
163 * away by decrementing the array size.
165 static const u32 vmx_msr_index
[] = {
167 MSR_SYSCALL_MASK
, MSR_LSTAR
, MSR_CSTAR
, MSR_KERNEL_GS_BASE
,
169 MSR_EFER
, MSR_K6_STAR
,
171 #define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index)
173 static void load_msrs(struct kvm_msr_entry
*e
, int n
)
177 for (i
= 0; i
< n
; ++i
)
178 wrmsrl(e
[i
].index
, e
[i
].data
);
181 static void save_msrs(struct kvm_msr_entry
*e
, int n
)
185 for (i
= 0; i
< n
; ++i
)
186 rdmsrl(e
[i
].index
, e
[i
].data
);
189 static inline int is_page_fault(u32 intr_info
)
191 return (intr_info
& (INTR_INFO_INTR_TYPE_MASK
| INTR_INFO_VECTOR_MASK
|
192 INTR_INFO_VALID_MASK
)) ==
193 (INTR_TYPE_HARD_EXCEPTION
| PF_VECTOR
| INTR_INFO_VALID_MASK
);
196 static inline int is_no_device(u32 intr_info
)
198 return (intr_info
& (INTR_INFO_INTR_TYPE_MASK
| INTR_INFO_VECTOR_MASK
|
199 INTR_INFO_VALID_MASK
)) ==
200 (INTR_TYPE_HARD_EXCEPTION
| NM_VECTOR
| INTR_INFO_VALID_MASK
);
203 static inline int is_invalid_opcode(u32 intr_info
)
205 return (intr_info
& (INTR_INFO_INTR_TYPE_MASK
| INTR_INFO_VECTOR_MASK
|
206 INTR_INFO_VALID_MASK
)) ==
207 (INTR_TYPE_HARD_EXCEPTION
| UD_VECTOR
| INTR_INFO_VALID_MASK
);
210 static inline int is_external_interrupt(u32 intr_info
)
212 return (intr_info
& (INTR_INFO_INTR_TYPE_MASK
| INTR_INFO_VALID_MASK
))
213 == (INTR_TYPE_EXT_INTR
| INTR_INFO_VALID_MASK
);
216 static inline int cpu_has_vmx_msr_bitmap(void)
218 return (vmcs_config
.cpu_based_exec_ctrl
& CPU_BASED_USE_MSR_BITMAPS
);
221 static inline int cpu_has_vmx_tpr_shadow(void)
223 return (vmcs_config
.cpu_based_exec_ctrl
& CPU_BASED_TPR_SHADOW
);
226 static inline int vm_need_tpr_shadow(struct kvm
*kvm
)
228 return ((cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm
)));
231 static inline int cpu_has_secondary_exec_ctrls(void)
233 return (vmcs_config
.cpu_based_exec_ctrl
&
234 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS
);
237 static inline bool cpu_has_vmx_virtualize_apic_accesses(void)
239 return flexpriority_enabled
240 && (vmcs_config
.cpu_based_2nd_exec_ctrl
&
241 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES
);
244 static inline int cpu_has_vmx_invept_individual_addr(void)
246 return (!!(vmx_capability
.ept
& VMX_EPT_EXTENT_INDIVIDUAL_BIT
));
249 static inline int cpu_has_vmx_invept_context(void)
251 return (!!(vmx_capability
.ept
& VMX_EPT_EXTENT_CONTEXT_BIT
));
254 static inline int cpu_has_vmx_invept_global(void)
256 return (!!(vmx_capability
.ept
& VMX_EPT_EXTENT_GLOBAL_BIT
));
259 static inline int cpu_has_vmx_ept(void)
261 return (vmcs_config
.cpu_based_2nd_exec_ctrl
&
262 SECONDARY_EXEC_ENABLE_EPT
);
265 static inline int vm_need_ept(void)
267 return (cpu_has_vmx_ept() && enable_ept
);
270 static inline int vm_need_virtualize_apic_accesses(struct kvm
*kvm
)
272 return ((cpu_has_vmx_virtualize_apic_accesses()) &&
273 (irqchip_in_kernel(kvm
)));
276 static inline int cpu_has_vmx_vpid(void)
278 return (vmcs_config
.cpu_based_2nd_exec_ctrl
&
279 SECONDARY_EXEC_ENABLE_VPID
);
282 static inline int cpu_has_virtual_nmis(void)
284 return vmcs_config
.pin_based_exec_ctrl
& PIN_BASED_VIRTUAL_NMIS
;
287 static int __find_msr_index(struct vcpu_vmx
*vmx
, u32 msr
)
291 for (i
= 0; i
< vmx
->nmsrs
; ++i
)
292 if (vmx
->guest_msrs
[i
].index
== msr
)
297 static inline void __invvpid(int ext
, u16 vpid
, gva_t gva
)
303 } operand
= { vpid
, 0, gva
};
305 asm volatile (__ex(ASM_VMX_INVVPID
)
306 /* CF==1 or ZF==1 --> rc = -1 */
308 : : "a"(&operand
), "c"(ext
) : "cc", "memory");
311 static inline void __invept(int ext
, u64 eptp
, gpa_t gpa
)
315 } operand
= {eptp
, gpa
};
317 asm volatile (__ex(ASM_VMX_INVEPT
)
318 /* CF==1 or ZF==1 --> rc = -1 */
319 "; ja 1f ; ud2 ; 1:\n"
320 : : "a" (&operand
), "c" (ext
) : "cc", "memory");
323 static struct kvm_msr_entry
*find_msr_entry(struct vcpu_vmx
*vmx
, u32 msr
)
327 i
= __find_msr_index(vmx
, msr
);
329 return &vmx
->guest_msrs
[i
];
333 static void vmcs_clear(struct vmcs
*vmcs
)
335 u64 phys_addr
= __pa(vmcs
);
338 asm volatile (__ex(ASM_VMX_VMCLEAR_RAX
) "; setna %0"
339 : "=g"(error
) : "a"(&phys_addr
), "m"(phys_addr
)
342 printk(KERN_ERR
"kvm: vmclear fail: %p/%llx\n",
346 static void __vcpu_clear(void *arg
)
348 struct vcpu_vmx
*vmx
= arg
;
349 int cpu
= raw_smp_processor_id();
351 if (vmx
->vcpu
.cpu
== cpu
)
352 vmcs_clear(vmx
->vmcs
);
353 if (per_cpu(current_vmcs
, cpu
) == vmx
->vmcs
)
354 per_cpu(current_vmcs
, cpu
) = NULL
;
355 rdtscll(vmx
->vcpu
.arch
.host_tsc
);
356 list_del(&vmx
->local_vcpus_link
);
361 static void vcpu_clear(struct vcpu_vmx
*vmx
)
363 if (vmx
->vcpu
.cpu
== -1)
365 smp_call_function_single(vmx
->vcpu
.cpu
, __vcpu_clear
, vmx
, 1);
368 static inline void vpid_sync_vcpu_all(struct vcpu_vmx
*vmx
)
373 __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT
, vmx
->vpid
, 0);
376 static inline void ept_sync_global(void)
378 if (cpu_has_vmx_invept_global())
379 __invept(VMX_EPT_EXTENT_GLOBAL
, 0, 0);
382 static inline void ept_sync_context(u64 eptp
)
385 if (cpu_has_vmx_invept_context())
386 __invept(VMX_EPT_EXTENT_CONTEXT
, eptp
, 0);
392 static inline void ept_sync_individual_addr(u64 eptp
, gpa_t gpa
)
395 if (cpu_has_vmx_invept_individual_addr())
396 __invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR
,
399 ept_sync_context(eptp
);
403 static unsigned long vmcs_readl(unsigned long field
)
407 asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX
)
408 : "=a"(value
) : "d"(field
) : "cc");
412 static u16
vmcs_read16(unsigned long field
)
414 return vmcs_readl(field
);
417 static u32
vmcs_read32(unsigned long field
)
419 return vmcs_readl(field
);
422 static u64
vmcs_read64(unsigned long field
)
425 return vmcs_readl(field
);
427 return vmcs_readl(field
) | ((u64
)vmcs_readl(field
+1) << 32);
431 static noinline
void vmwrite_error(unsigned long field
, unsigned long value
)
433 printk(KERN_ERR
"vmwrite error: reg %lx value %lx (err %d)\n",
434 field
, value
, vmcs_read32(VM_INSTRUCTION_ERROR
));
438 static void vmcs_writel(unsigned long field
, unsigned long value
)
442 asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX
) "; setna %0"
443 : "=q"(error
) : "a"(value
), "d"(field
) : "cc");
445 vmwrite_error(field
, value
);
448 static void vmcs_write16(unsigned long field
, u16 value
)
450 vmcs_writel(field
, value
);
453 static void vmcs_write32(unsigned long field
, u32 value
)
455 vmcs_writel(field
, value
);
458 static void vmcs_write64(unsigned long field
, u64 value
)
460 vmcs_writel(field
, value
);
461 #ifndef CONFIG_X86_64
463 vmcs_writel(field
+1, value
>> 32);
467 static void vmcs_clear_bits(unsigned long field
, u32 mask
)
469 vmcs_writel(field
, vmcs_readl(field
) & ~mask
);
472 static void vmcs_set_bits(unsigned long field
, u32 mask
)
474 vmcs_writel(field
, vmcs_readl(field
) | mask
);
477 static void update_exception_bitmap(struct kvm_vcpu
*vcpu
)
481 eb
= (1u << PF_VECTOR
) | (1u << UD_VECTOR
);
482 if (!vcpu
->fpu_active
)
483 eb
|= 1u << NM_VECTOR
;
484 if (vcpu
->guest_debug
& KVM_GUESTDBG_ENABLE
) {
485 if (vcpu
->guest_debug
&
486 (KVM_GUESTDBG_SINGLESTEP
| KVM_GUESTDBG_USE_HW_BP
))
487 eb
|= 1u << DB_VECTOR
;
488 if (vcpu
->guest_debug
& KVM_GUESTDBG_USE_SW_BP
)
489 eb
|= 1u << BP_VECTOR
;
491 if (vcpu
->arch
.rmode
.active
)
494 eb
&= ~(1u << PF_VECTOR
); /* bypass_guest_pf = 0 */
495 vmcs_write32(EXCEPTION_BITMAP
, eb
);
498 static void reload_tss(void)
501 * VT restores TR but not its size. Useless.
503 struct descriptor_table gdt
;
504 struct desc_struct
*descs
;
507 descs
= (void *)gdt
.base
;
508 descs
[GDT_ENTRY_TSS
].type
= 9; /* available TSS */
512 static void load_transition_efer(struct vcpu_vmx
*vmx
)
514 int efer_offset
= vmx
->msr_offset_efer
;
515 u64 host_efer
= vmx
->host_msrs
[efer_offset
].data
;
516 u64 guest_efer
= vmx
->guest_msrs
[efer_offset
].data
;
522 * NX is emulated; LMA and LME handled by hardware; SCE meaninless
525 ignore_bits
= EFER_NX
| EFER_SCE
;
527 ignore_bits
|= EFER_LMA
| EFER_LME
;
528 /* SCE is meaningful only in long mode on Intel */
529 if (guest_efer
& EFER_LMA
)
530 ignore_bits
&= ~(u64
)EFER_SCE
;
532 if ((guest_efer
& ~ignore_bits
) == (host_efer
& ~ignore_bits
))
535 vmx
->host_state
.guest_efer_loaded
= 1;
536 guest_efer
&= ~ignore_bits
;
537 guest_efer
|= host_efer
& ignore_bits
;
538 wrmsrl(MSR_EFER
, guest_efer
);
539 vmx
->vcpu
.stat
.efer_reload
++;
542 static void reload_host_efer(struct vcpu_vmx
*vmx
)
544 if (vmx
->host_state
.guest_efer_loaded
) {
545 vmx
->host_state
.guest_efer_loaded
= 0;
546 load_msrs(vmx
->host_msrs
+ vmx
->msr_offset_efer
, 1);
550 static void vmx_save_host_state(struct kvm_vcpu
*vcpu
)
552 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
554 if (vmx
->host_state
.loaded
)
557 vmx
->host_state
.loaded
= 1;
559 * Set host fs and gs selectors. Unfortunately, 22.2.3 does not
560 * allow segment selectors with cpl > 0 or ti == 1.
562 vmx
->host_state
.ldt_sel
= kvm_read_ldt();
563 vmx
->host_state
.gs_ldt_reload_needed
= vmx
->host_state
.ldt_sel
;
564 vmx
->host_state
.fs_sel
= kvm_read_fs();
565 if (!(vmx
->host_state
.fs_sel
& 7)) {
566 vmcs_write16(HOST_FS_SELECTOR
, vmx
->host_state
.fs_sel
);
567 vmx
->host_state
.fs_reload_needed
= 0;
569 vmcs_write16(HOST_FS_SELECTOR
, 0);
570 vmx
->host_state
.fs_reload_needed
= 1;
572 vmx
->host_state
.gs_sel
= kvm_read_gs();
573 if (!(vmx
->host_state
.gs_sel
& 7))
574 vmcs_write16(HOST_GS_SELECTOR
, vmx
->host_state
.gs_sel
);
576 vmcs_write16(HOST_GS_SELECTOR
, 0);
577 vmx
->host_state
.gs_ldt_reload_needed
= 1;
581 vmcs_writel(HOST_FS_BASE
, read_msr(MSR_FS_BASE
));
582 vmcs_writel(HOST_GS_BASE
, read_msr(MSR_GS_BASE
));
584 vmcs_writel(HOST_FS_BASE
, segment_base(vmx
->host_state
.fs_sel
));
585 vmcs_writel(HOST_GS_BASE
, segment_base(vmx
->host_state
.gs_sel
));
589 if (is_long_mode(&vmx
->vcpu
))
590 save_msrs(vmx
->host_msrs
+
591 vmx
->msr_offset_kernel_gs_base
, 1);
594 load_msrs(vmx
->guest_msrs
, vmx
->save_nmsrs
);
595 load_transition_efer(vmx
);
598 static void __vmx_load_host_state(struct vcpu_vmx
*vmx
)
602 if (!vmx
->host_state
.loaded
)
605 ++vmx
->vcpu
.stat
.host_state_reload
;
606 vmx
->host_state
.loaded
= 0;
607 if (vmx
->host_state
.fs_reload_needed
)
608 kvm_load_fs(vmx
->host_state
.fs_sel
);
609 if (vmx
->host_state
.gs_ldt_reload_needed
) {
610 kvm_load_ldt(vmx
->host_state
.ldt_sel
);
612 * If we have to reload gs, we must take care to
613 * preserve our gs base.
615 local_irq_save(flags
);
616 kvm_load_gs(vmx
->host_state
.gs_sel
);
618 wrmsrl(MSR_GS_BASE
, vmcs_readl(HOST_GS_BASE
));
620 local_irq_restore(flags
);
623 save_msrs(vmx
->guest_msrs
, vmx
->save_nmsrs
);
624 load_msrs(vmx
->host_msrs
, vmx
->save_nmsrs
);
625 reload_host_efer(vmx
);
628 static void vmx_load_host_state(struct vcpu_vmx
*vmx
)
631 __vmx_load_host_state(vmx
);
636 * Switches to specified vcpu, until a matching vcpu_put(), but assumes
637 * vcpu mutex is already taken.
639 static void vmx_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
641 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
642 u64 phys_addr
= __pa(vmx
->vmcs
);
643 u64 tsc_this
, delta
, new_offset
;
645 if (vcpu
->cpu
!= cpu
) {
647 kvm_migrate_timers(vcpu
);
648 vpid_sync_vcpu_all(vmx
);
650 list_add(&vmx
->local_vcpus_link
,
651 &per_cpu(vcpus_on_cpu
, cpu
));
655 if (per_cpu(current_vmcs
, cpu
) != vmx
->vmcs
) {
658 per_cpu(current_vmcs
, cpu
) = vmx
->vmcs
;
659 asm volatile (__ex(ASM_VMX_VMPTRLD_RAX
) "; setna %0"
660 : "=g"(error
) : "a"(&phys_addr
), "m"(phys_addr
)
663 printk(KERN_ERR
"kvm: vmptrld %p/%llx fail\n",
664 vmx
->vmcs
, phys_addr
);
667 if (vcpu
->cpu
!= cpu
) {
668 struct descriptor_table dt
;
669 unsigned long sysenter_esp
;
673 * Linux uses per-cpu TSS and GDT, so set these when switching
676 vmcs_writel(HOST_TR_BASE
, kvm_read_tr_base()); /* 22.2.4 */
678 vmcs_writel(HOST_GDTR_BASE
, dt
.base
); /* 22.2.4 */
680 rdmsrl(MSR_IA32_SYSENTER_ESP
, sysenter_esp
);
681 vmcs_writel(HOST_IA32_SYSENTER_ESP
, sysenter_esp
); /* 22.2.3 */
684 * Make sure the time stamp counter is monotonous.
687 if (tsc_this
< vcpu
->arch
.host_tsc
) {
688 delta
= vcpu
->arch
.host_tsc
- tsc_this
;
689 new_offset
= vmcs_read64(TSC_OFFSET
) + delta
;
690 vmcs_write64(TSC_OFFSET
, new_offset
);
695 static void vmx_vcpu_put(struct kvm_vcpu
*vcpu
)
697 __vmx_load_host_state(to_vmx(vcpu
));
700 static void vmx_fpu_activate(struct kvm_vcpu
*vcpu
)
702 if (vcpu
->fpu_active
)
704 vcpu
->fpu_active
= 1;
705 vmcs_clear_bits(GUEST_CR0
, X86_CR0_TS
);
706 if (vcpu
->arch
.cr0
& X86_CR0_TS
)
707 vmcs_set_bits(GUEST_CR0
, X86_CR0_TS
);
708 update_exception_bitmap(vcpu
);
711 static void vmx_fpu_deactivate(struct kvm_vcpu
*vcpu
)
713 if (!vcpu
->fpu_active
)
715 vcpu
->fpu_active
= 0;
716 vmcs_set_bits(GUEST_CR0
, X86_CR0_TS
);
717 update_exception_bitmap(vcpu
);
720 static unsigned long vmx_get_rflags(struct kvm_vcpu
*vcpu
)
722 return vmcs_readl(GUEST_RFLAGS
);
725 static void vmx_set_rflags(struct kvm_vcpu
*vcpu
, unsigned long rflags
)
727 if (vcpu
->arch
.rmode
.active
)
728 rflags
|= X86_EFLAGS_IOPL
| X86_EFLAGS_VM
;
729 vmcs_writel(GUEST_RFLAGS
, rflags
);
732 static void skip_emulated_instruction(struct kvm_vcpu
*vcpu
)
735 u32 interruptibility
;
737 rip
= kvm_rip_read(vcpu
);
738 rip
+= vmcs_read32(VM_EXIT_INSTRUCTION_LEN
);
739 kvm_rip_write(vcpu
, rip
);
742 * We emulated an instruction, so temporary interrupt blocking
743 * should be removed, if set.
745 interruptibility
= vmcs_read32(GUEST_INTERRUPTIBILITY_INFO
);
746 if (interruptibility
& 3)
747 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO
,
748 interruptibility
& ~3);
749 vcpu
->arch
.interrupt_window_open
= 1;
752 static void vmx_queue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
,
753 bool has_error_code
, u32 error_code
)
755 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
756 u32 intr_info
= nr
| INTR_INFO_VALID_MASK
;
758 if (has_error_code
) {
759 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE
, error_code
);
760 intr_info
|= INTR_INFO_DELIVER_CODE_MASK
;
763 if (vcpu
->arch
.rmode
.active
) {
764 vmx
->rmode
.irq
.pending
= true;
765 vmx
->rmode
.irq
.vector
= nr
;
766 vmx
->rmode
.irq
.rip
= kvm_rip_read(vcpu
);
767 if (nr
== BP_VECTOR
|| nr
== OF_VECTOR
)
768 vmx
->rmode
.irq
.rip
++;
769 intr_info
|= INTR_TYPE_SOFT_INTR
;
770 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD
, intr_info
);
771 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN
, 1);
772 kvm_rip_write(vcpu
, vmx
->rmode
.irq
.rip
- 1);
776 if (nr
== BP_VECTOR
|| nr
== OF_VECTOR
) {
777 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN
, 1);
778 intr_info
|= INTR_TYPE_SOFT_EXCEPTION
;
780 intr_info
|= INTR_TYPE_HARD_EXCEPTION
;
782 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD
, intr_info
);
785 static bool vmx_exception_injected(struct kvm_vcpu
*vcpu
)
791 * Swap MSR entry in host/guest MSR entry array.
794 static void move_msr_up(struct vcpu_vmx
*vmx
, int from
, int to
)
796 struct kvm_msr_entry tmp
;
798 tmp
= vmx
->guest_msrs
[to
];
799 vmx
->guest_msrs
[to
] = vmx
->guest_msrs
[from
];
800 vmx
->guest_msrs
[from
] = tmp
;
801 tmp
= vmx
->host_msrs
[to
];
802 vmx
->host_msrs
[to
] = vmx
->host_msrs
[from
];
803 vmx
->host_msrs
[from
] = tmp
;
808 * Set up the vmcs to automatically save and restore system
809 * msrs. Don't touch the 64-bit msrs if the guest is in legacy
810 * mode, as fiddling with msrs is very expensive.
812 static void setup_msrs(struct vcpu_vmx
*vmx
)
816 vmx_load_host_state(vmx
);
819 if (is_long_mode(&vmx
->vcpu
)) {
822 index
= __find_msr_index(vmx
, MSR_SYSCALL_MASK
);
824 move_msr_up(vmx
, index
, save_nmsrs
++);
825 index
= __find_msr_index(vmx
, MSR_LSTAR
);
827 move_msr_up(vmx
, index
, save_nmsrs
++);
828 index
= __find_msr_index(vmx
, MSR_CSTAR
);
830 move_msr_up(vmx
, index
, save_nmsrs
++);
831 index
= __find_msr_index(vmx
, MSR_KERNEL_GS_BASE
);
833 move_msr_up(vmx
, index
, save_nmsrs
++);
835 * MSR_K6_STAR is only needed on long mode guests, and only
836 * if efer.sce is enabled.
838 index
= __find_msr_index(vmx
, MSR_K6_STAR
);
839 if ((index
>= 0) && (vmx
->vcpu
.arch
.shadow_efer
& EFER_SCE
))
840 move_msr_up(vmx
, index
, save_nmsrs
++);
843 vmx
->save_nmsrs
= save_nmsrs
;
846 vmx
->msr_offset_kernel_gs_base
=
847 __find_msr_index(vmx
, MSR_KERNEL_GS_BASE
);
849 vmx
->msr_offset_efer
= __find_msr_index(vmx
, MSR_EFER
);
853 * reads and returns guest's timestamp counter "register"
854 * guest_tsc = host_tsc + tsc_offset -- 21.3
856 static u64
guest_read_tsc(void)
858 u64 host_tsc
, tsc_offset
;
861 tsc_offset
= vmcs_read64(TSC_OFFSET
);
862 return host_tsc
+ tsc_offset
;
866 * writes 'guest_tsc' into guest's timestamp counter "register"
867 * guest_tsc = host_tsc + tsc_offset ==> tsc_offset = guest_tsc - host_tsc
869 static void guest_write_tsc(u64 guest_tsc
, u64 host_tsc
)
871 vmcs_write64(TSC_OFFSET
, guest_tsc
- host_tsc
);
875 * Reads an msr value (of 'msr_index') into 'pdata'.
876 * Returns 0 on success, non-0 otherwise.
877 * Assumes vcpu_load() was already called.
879 static int vmx_get_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64
*pdata
)
882 struct kvm_msr_entry
*msr
;
885 printk(KERN_ERR
"BUG: get_msr called with NULL pdata\n");
892 data
= vmcs_readl(GUEST_FS_BASE
);
895 data
= vmcs_readl(GUEST_GS_BASE
);
898 return kvm_get_msr_common(vcpu
, msr_index
, pdata
);
900 case MSR_IA32_TIME_STAMP_COUNTER
:
901 data
= guest_read_tsc();
903 case MSR_IA32_SYSENTER_CS
:
904 data
= vmcs_read32(GUEST_SYSENTER_CS
);
906 case MSR_IA32_SYSENTER_EIP
:
907 data
= vmcs_readl(GUEST_SYSENTER_EIP
);
909 case MSR_IA32_SYSENTER_ESP
:
910 data
= vmcs_readl(GUEST_SYSENTER_ESP
);
913 vmx_load_host_state(to_vmx(vcpu
));
914 msr
= find_msr_entry(to_vmx(vcpu
), msr_index
);
919 return kvm_get_msr_common(vcpu
, msr_index
, pdata
);
927 * Writes msr value into into the appropriate "register".
928 * Returns 0 on success, non-0 otherwise.
929 * Assumes vcpu_load() was already called.
931 static int vmx_set_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64 data
)
933 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
934 struct kvm_msr_entry
*msr
;
941 vmx_load_host_state(vmx
);
942 ret
= kvm_set_msr_common(vcpu
, msr_index
, data
);
945 vmcs_writel(GUEST_FS_BASE
, data
);
948 vmcs_writel(GUEST_GS_BASE
, data
);
951 case MSR_IA32_SYSENTER_CS
:
952 vmcs_write32(GUEST_SYSENTER_CS
, data
);
954 case MSR_IA32_SYSENTER_EIP
:
955 vmcs_writel(GUEST_SYSENTER_EIP
, data
);
957 case MSR_IA32_SYSENTER_ESP
:
958 vmcs_writel(GUEST_SYSENTER_ESP
, data
);
960 case MSR_IA32_TIME_STAMP_COUNTER
:
962 guest_write_tsc(data
, host_tsc
);
964 case MSR_P6_PERFCTR0
:
965 case MSR_P6_PERFCTR1
:
966 case MSR_P6_EVNTSEL0
:
967 case MSR_P6_EVNTSEL1
:
969 * Just discard all writes to the performance counters; this
970 * should keep both older linux and windows 64-bit guests
973 pr_unimpl(vcpu
, "unimplemented perfctr wrmsr: 0x%x data 0x%llx\n", msr_index
, data
);
976 case MSR_IA32_CR_PAT
:
977 if (vmcs_config
.vmentry_ctrl
& VM_ENTRY_LOAD_IA32_PAT
) {
978 vmcs_write64(GUEST_IA32_PAT
, data
);
979 vcpu
->arch
.pat
= data
;
982 /* Otherwise falls through to kvm_set_msr_common */
984 vmx_load_host_state(vmx
);
985 msr
= find_msr_entry(vmx
, msr_index
);
990 ret
= kvm_set_msr_common(vcpu
, msr_index
, data
);
996 static void vmx_cache_reg(struct kvm_vcpu
*vcpu
, enum kvm_reg reg
)
998 __set_bit(reg
, (unsigned long *)&vcpu
->arch
.regs_avail
);
1001 vcpu
->arch
.regs
[VCPU_REGS_RSP
] = vmcs_readl(GUEST_RSP
);
1004 vcpu
->arch
.regs
[VCPU_REGS_RIP
] = vmcs_readl(GUEST_RIP
);
1011 static int set_guest_debug(struct kvm_vcpu
*vcpu
, struct kvm_guest_debug
*dbg
)
1013 int old_debug
= vcpu
->guest_debug
;
1014 unsigned long flags
;
1016 vcpu
->guest_debug
= dbg
->control
;
1017 if (!(vcpu
->guest_debug
& KVM_GUESTDBG_ENABLE
))
1018 vcpu
->guest_debug
= 0;
1020 if (vcpu
->guest_debug
& KVM_GUESTDBG_USE_HW_BP
)
1021 vmcs_writel(GUEST_DR7
, dbg
->arch
.debugreg
[7]);
1023 vmcs_writel(GUEST_DR7
, vcpu
->arch
.dr7
);
1025 flags
= vmcs_readl(GUEST_RFLAGS
);
1026 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
)
1027 flags
|= X86_EFLAGS_TF
| X86_EFLAGS_RF
;
1028 else if (old_debug
& KVM_GUESTDBG_SINGLESTEP
)
1029 flags
&= ~(X86_EFLAGS_TF
| X86_EFLAGS_RF
);
1030 vmcs_writel(GUEST_RFLAGS
, flags
);
1032 update_exception_bitmap(vcpu
);
1037 static int vmx_get_irq(struct kvm_vcpu
*vcpu
)
1039 if (!vcpu
->arch
.interrupt
.pending
)
1041 return vcpu
->arch
.interrupt
.nr
;
1044 static __init
int cpu_has_kvm_support(void)
1046 return cpu_has_vmx();
1049 static __init
int vmx_disabled_by_bios(void)
1053 rdmsrl(MSR_IA32_FEATURE_CONTROL
, msr
);
1054 return (msr
& (FEATURE_CONTROL_LOCKED
|
1055 FEATURE_CONTROL_VMXON_ENABLED
))
1056 == FEATURE_CONTROL_LOCKED
;
1057 /* locked but not enabled */
1060 static void hardware_enable(void *garbage
)
1062 int cpu
= raw_smp_processor_id();
1063 u64 phys_addr
= __pa(per_cpu(vmxarea
, cpu
));
1066 INIT_LIST_HEAD(&per_cpu(vcpus_on_cpu
, cpu
));
1067 rdmsrl(MSR_IA32_FEATURE_CONTROL
, old
);
1068 if ((old
& (FEATURE_CONTROL_LOCKED
|
1069 FEATURE_CONTROL_VMXON_ENABLED
))
1070 != (FEATURE_CONTROL_LOCKED
|
1071 FEATURE_CONTROL_VMXON_ENABLED
))
1072 /* enable and lock */
1073 wrmsrl(MSR_IA32_FEATURE_CONTROL
, old
|
1074 FEATURE_CONTROL_LOCKED
|
1075 FEATURE_CONTROL_VMXON_ENABLED
);
1076 write_cr4(read_cr4() | X86_CR4_VMXE
); /* FIXME: not cpu hotplug safe */
1077 asm volatile (ASM_VMX_VMXON_RAX
1078 : : "a"(&phys_addr
), "m"(phys_addr
)
1082 static void vmclear_local_vcpus(void)
1084 int cpu
= raw_smp_processor_id();
1085 struct vcpu_vmx
*vmx
, *n
;
1087 list_for_each_entry_safe(vmx
, n
, &per_cpu(vcpus_on_cpu
, cpu
),
1093 /* Just like cpu_vmxoff(), but with the __kvm_handle_fault_on_reboot()
1096 static void kvm_cpu_vmxoff(void)
1098 asm volatile (__ex(ASM_VMX_VMXOFF
) : : : "cc");
1099 write_cr4(read_cr4() & ~X86_CR4_VMXE
);
1102 static void hardware_disable(void *garbage
)
1104 vmclear_local_vcpus();
1108 static __init
int adjust_vmx_controls(u32 ctl_min
, u32 ctl_opt
,
1109 u32 msr
, u32
*result
)
1111 u32 vmx_msr_low
, vmx_msr_high
;
1112 u32 ctl
= ctl_min
| ctl_opt
;
1114 rdmsr(msr
, vmx_msr_low
, vmx_msr_high
);
1116 ctl
&= vmx_msr_high
; /* bit == 0 in high word ==> must be zero */
1117 ctl
|= vmx_msr_low
; /* bit == 1 in low word ==> must be one */
1119 /* Ensure minimum (required) set of control bits are supported. */
1127 static __init
int setup_vmcs_config(struct vmcs_config
*vmcs_conf
)
1129 u32 vmx_msr_low
, vmx_msr_high
;
1130 u32 min
, opt
, min2
, opt2
;
1131 u32 _pin_based_exec_control
= 0;
1132 u32 _cpu_based_exec_control
= 0;
1133 u32 _cpu_based_2nd_exec_control
= 0;
1134 u32 _vmexit_control
= 0;
1135 u32 _vmentry_control
= 0;
1137 min
= PIN_BASED_EXT_INTR_MASK
| PIN_BASED_NMI_EXITING
;
1138 opt
= PIN_BASED_VIRTUAL_NMIS
;
1139 if (adjust_vmx_controls(min
, opt
, MSR_IA32_VMX_PINBASED_CTLS
,
1140 &_pin_based_exec_control
) < 0)
1143 min
= CPU_BASED_HLT_EXITING
|
1144 #ifdef CONFIG_X86_64
1145 CPU_BASED_CR8_LOAD_EXITING
|
1146 CPU_BASED_CR8_STORE_EXITING
|
1148 CPU_BASED_CR3_LOAD_EXITING
|
1149 CPU_BASED_CR3_STORE_EXITING
|
1150 CPU_BASED_USE_IO_BITMAPS
|
1151 CPU_BASED_MOV_DR_EXITING
|
1152 CPU_BASED_USE_TSC_OFFSETING
|
1153 CPU_BASED_INVLPG_EXITING
;
1154 opt
= CPU_BASED_TPR_SHADOW
|
1155 CPU_BASED_USE_MSR_BITMAPS
|
1156 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS
;
1157 if (adjust_vmx_controls(min
, opt
, MSR_IA32_VMX_PROCBASED_CTLS
,
1158 &_cpu_based_exec_control
) < 0)
1160 #ifdef CONFIG_X86_64
1161 if ((_cpu_based_exec_control
& CPU_BASED_TPR_SHADOW
))
1162 _cpu_based_exec_control
&= ~CPU_BASED_CR8_LOAD_EXITING
&
1163 ~CPU_BASED_CR8_STORE_EXITING
;
1165 if (_cpu_based_exec_control
& CPU_BASED_ACTIVATE_SECONDARY_CONTROLS
) {
1167 opt2
= SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES
|
1168 SECONDARY_EXEC_WBINVD_EXITING
|
1169 SECONDARY_EXEC_ENABLE_VPID
|
1170 SECONDARY_EXEC_ENABLE_EPT
;
1171 if (adjust_vmx_controls(min2
, opt2
,
1172 MSR_IA32_VMX_PROCBASED_CTLS2
,
1173 &_cpu_based_2nd_exec_control
) < 0)
1176 #ifndef CONFIG_X86_64
1177 if (!(_cpu_based_2nd_exec_control
&
1178 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES
))
1179 _cpu_based_exec_control
&= ~CPU_BASED_TPR_SHADOW
;
1181 if (_cpu_based_2nd_exec_control
& SECONDARY_EXEC_ENABLE_EPT
) {
1182 /* CR3 accesses and invlpg don't need to cause VM Exits when EPT
1184 min
&= ~(CPU_BASED_CR3_LOAD_EXITING
|
1185 CPU_BASED_CR3_STORE_EXITING
|
1186 CPU_BASED_INVLPG_EXITING
);
1187 if (adjust_vmx_controls(min
, opt
, MSR_IA32_VMX_PROCBASED_CTLS
,
1188 &_cpu_based_exec_control
) < 0)
1190 rdmsr(MSR_IA32_VMX_EPT_VPID_CAP
,
1191 vmx_capability
.ept
, vmx_capability
.vpid
);
1195 #ifdef CONFIG_X86_64
1196 min
|= VM_EXIT_HOST_ADDR_SPACE_SIZE
;
1198 opt
= VM_EXIT_SAVE_IA32_PAT
| VM_EXIT_LOAD_IA32_PAT
;
1199 if (adjust_vmx_controls(min
, opt
, MSR_IA32_VMX_EXIT_CTLS
,
1200 &_vmexit_control
) < 0)
1204 opt
= VM_ENTRY_LOAD_IA32_PAT
;
1205 if (adjust_vmx_controls(min
, opt
, MSR_IA32_VMX_ENTRY_CTLS
,
1206 &_vmentry_control
) < 0)
1209 rdmsr(MSR_IA32_VMX_BASIC
, vmx_msr_low
, vmx_msr_high
);
1211 /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */
1212 if ((vmx_msr_high
& 0x1fff) > PAGE_SIZE
)
1215 #ifdef CONFIG_X86_64
1216 /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */
1217 if (vmx_msr_high
& (1u<<16))
1221 /* Require Write-Back (WB) memory type for VMCS accesses. */
1222 if (((vmx_msr_high
>> 18) & 15) != 6)
1225 vmcs_conf
->size
= vmx_msr_high
& 0x1fff;
1226 vmcs_conf
->order
= get_order(vmcs_config
.size
);
1227 vmcs_conf
->revision_id
= vmx_msr_low
;
1229 vmcs_conf
->pin_based_exec_ctrl
= _pin_based_exec_control
;
1230 vmcs_conf
->cpu_based_exec_ctrl
= _cpu_based_exec_control
;
1231 vmcs_conf
->cpu_based_2nd_exec_ctrl
= _cpu_based_2nd_exec_control
;
1232 vmcs_conf
->vmexit_ctrl
= _vmexit_control
;
1233 vmcs_conf
->vmentry_ctrl
= _vmentry_control
;
1238 static struct vmcs
*alloc_vmcs_cpu(int cpu
)
1240 int node
= cpu_to_node(cpu
);
1244 pages
= alloc_pages_node(node
, GFP_KERNEL
, vmcs_config
.order
);
1247 vmcs
= page_address(pages
);
1248 memset(vmcs
, 0, vmcs_config
.size
);
1249 vmcs
->revision_id
= vmcs_config
.revision_id
; /* vmcs revision id */
1253 static struct vmcs
*alloc_vmcs(void)
1255 return alloc_vmcs_cpu(raw_smp_processor_id());
1258 static void free_vmcs(struct vmcs
*vmcs
)
1260 free_pages((unsigned long)vmcs
, vmcs_config
.order
);
1263 static void free_kvm_area(void)
1267 for_each_online_cpu(cpu
)
1268 free_vmcs(per_cpu(vmxarea
, cpu
));
1271 static __init
int alloc_kvm_area(void)
1275 for_each_online_cpu(cpu
) {
1278 vmcs
= alloc_vmcs_cpu(cpu
);
1284 per_cpu(vmxarea
, cpu
) = vmcs
;
1289 static __init
int hardware_setup(void)
1291 if (setup_vmcs_config(&vmcs_config
) < 0)
1294 if (boot_cpu_has(X86_FEATURE_NX
))
1295 kvm_enable_efer_bits(EFER_NX
);
1297 return alloc_kvm_area();
1300 static __exit
void hardware_unsetup(void)
1305 static void fix_pmode_dataseg(int seg
, struct kvm_save_segment
*save
)
1307 struct kvm_vmx_segment_field
*sf
= &kvm_vmx_segment_fields
[seg
];
1309 if (vmcs_readl(sf
->base
) == save
->base
&& (save
->base
& AR_S_MASK
)) {
1310 vmcs_write16(sf
->selector
, save
->selector
);
1311 vmcs_writel(sf
->base
, save
->base
);
1312 vmcs_write32(sf
->limit
, save
->limit
);
1313 vmcs_write32(sf
->ar_bytes
, save
->ar
);
1315 u32 dpl
= (vmcs_read16(sf
->selector
) & SELECTOR_RPL_MASK
)
1317 vmcs_write32(sf
->ar_bytes
, 0x93 | dpl
);
1321 static void enter_pmode(struct kvm_vcpu
*vcpu
)
1323 unsigned long flags
;
1324 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
1326 vmx
->emulation_required
= 1;
1327 vcpu
->arch
.rmode
.active
= 0;
1329 vmcs_writel(GUEST_TR_BASE
, vcpu
->arch
.rmode
.tr
.base
);
1330 vmcs_write32(GUEST_TR_LIMIT
, vcpu
->arch
.rmode
.tr
.limit
);
1331 vmcs_write32(GUEST_TR_AR_BYTES
, vcpu
->arch
.rmode
.tr
.ar
);
1333 flags
= vmcs_readl(GUEST_RFLAGS
);
1334 flags
&= ~(X86_EFLAGS_IOPL
| X86_EFLAGS_VM
);
1335 flags
|= (vcpu
->arch
.rmode
.save_iopl
<< IOPL_SHIFT
);
1336 vmcs_writel(GUEST_RFLAGS
, flags
);
1338 vmcs_writel(GUEST_CR4
, (vmcs_readl(GUEST_CR4
) & ~X86_CR4_VME
) |
1339 (vmcs_readl(CR4_READ_SHADOW
) & X86_CR4_VME
));
1341 update_exception_bitmap(vcpu
);
1343 if (emulate_invalid_guest_state
)
1346 fix_pmode_dataseg(VCPU_SREG_ES
, &vcpu
->arch
.rmode
.es
);
1347 fix_pmode_dataseg(VCPU_SREG_DS
, &vcpu
->arch
.rmode
.ds
);
1348 fix_pmode_dataseg(VCPU_SREG_GS
, &vcpu
->arch
.rmode
.gs
);
1349 fix_pmode_dataseg(VCPU_SREG_FS
, &vcpu
->arch
.rmode
.fs
);
1351 vmcs_write16(GUEST_SS_SELECTOR
, 0);
1352 vmcs_write32(GUEST_SS_AR_BYTES
, 0x93);
1354 vmcs_write16(GUEST_CS_SELECTOR
,
1355 vmcs_read16(GUEST_CS_SELECTOR
) & ~SELECTOR_RPL_MASK
);
1356 vmcs_write32(GUEST_CS_AR_BYTES
, 0x9b);
1359 static gva_t
rmode_tss_base(struct kvm
*kvm
)
1361 if (!kvm
->arch
.tss_addr
) {
1362 gfn_t base_gfn
= kvm
->memslots
[0].base_gfn
+
1363 kvm
->memslots
[0].npages
- 3;
1364 return base_gfn
<< PAGE_SHIFT
;
1366 return kvm
->arch
.tss_addr
;
1369 static void fix_rmode_seg(int seg
, struct kvm_save_segment
*save
)
1371 struct kvm_vmx_segment_field
*sf
= &kvm_vmx_segment_fields
[seg
];
1373 save
->selector
= vmcs_read16(sf
->selector
);
1374 save
->base
= vmcs_readl(sf
->base
);
1375 save
->limit
= vmcs_read32(sf
->limit
);
1376 save
->ar
= vmcs_read32(sf
->ar_bytes
);
1377 vmcs_write16(sf
->selector
, save
->base
>> 4);
1378 vmcs_write32(sf
->base
, save
->base
& 0xfffff);
1379 vmcs_write32(sf
->limit
, 0xffff);
1380 vmcs_write32(sf
->ar_bytes
, 0xf3);
1383 static void enter_rmode(struct kvm_vcpu
*vcpu
)
1385 unsigned long flags
;
1386 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
1388 vmx
->emulation_required
= 1;
1389 vcpu
->arch
.rmode
.active
= 1;
1391 vcpu
->arch
.rmode
.tr
.base
= vmcs_readl(GUEST_TR_BASE
);
1392 vmcs_writel(GUEST_TR_BASE
, rmode_tss_base(vcpu
->kvm
));
1394 vcpu
->arch
.rmode
.tr
.limit
= vmcs_read32(GUEST_TR_LIMIT
);
1395 vmcs_write32(GUEST_TR_LIMIT
, RMODE_TSS_SIZE
- 1);
1397 vcpu
->arch
.rmode
.tr
.ar
= vmcs_read32(GUEST_TR_AR_BYTES
);
1398 vmcs_write32(GUEST_TR_AR_BYTES
, 0x008b);
1400 flags
= vmcs_readl(GUEST_RFLAGS
);
1401 vcpu
->arch
.rmode
.save_iopl
1402 = (flags
& X86_EFLAGS_IOPL
) >> IOPL_SHIFT
;
1404 flags
|= X86_EFLAGS_IOPL
| X86_EFLAGS_VM
;
1406 vmcs_writel(GUEST_RFLAGS
, flags
);
1407 vmcs_writel(GUEST_CR4
, vmcs_readl(GUEST_CR4
) | X86_CR4_VME
);
1408 update_exception_bitmap(vcpu
);
1410 if (emulate_invalid_guest_state
)
1411 goto continue_rmode
;
1413 vmcs_write16(GUEST_SS_SELECTOR
, vmcs_readl(GUEST_SS_BASE
) >> 4);
1414 vmcs_write32(GUEST_SS_LIMIT
, 0xffff);
1415 vmcs_write32(GUEST_SS_AR_BYTES
, 0xf3);
1417 vmcs_write32(GUEST_CS_AR_BYTES
, 0xf3);
1418 vmcs_write32(GUEST_CS_LIMIT
, 0xffff);
1419 if (vmcs_readl(GUEST_CS_BASE
) == 0xffff0000)
1420 vmcs_writel(GUEST_CS_BASE
, 0xf0000);
1421 vmcs_write16(GUEST_CS_SELECTOR
, vmcs_readl(GUEST_CS_BASE
) >> 4);
1423 fix_rmode_seg(VCPU_SREG_ES
, &vcpu
->arch
.rmode
.es
);
1424 fix_rmode_seg(VCPU_SREG_DS
, &vcpu
->arch
.rmode
.ds
);
1425 fix_rmode_seg(VCPU_SREG_GS
, &vcpu
->arch
.rmode
.gs
);
1426 fix_rmode_seg(VCPU_SREG_FS
, &vcpu
->arch
.rmode
.fs
);
1429 kvm_mmu_reset_context(vcpu
);
1430 init_rmode(vcpu
->kvm
);
1433 #ifdef CONFIG_X86_64
1435 static void enter_lmode(struct kvm_vcpu
*vcpu
)
1439 guest_tr_ar
= vmcs_read32(GUEST_TR_AR_BYTES
);
1440 if ((guest_tr_ar
& AR_TYPE_MASK
) != AR_TYPE_BUSY_64_TSS
) {
1441 printk(KERN_DEBUG
"%s: tss fixup for long mode. \n",
1443 vmcs_write32(GUEST_TR_AR_BYTES
,
1444 (guest_tr_ar
& ~AR_TYPE_MASK
)
1445 | AR_TYPE_BUSY_64_TSS
);
1448 vcpu
->arch
.shadow_efer
|= EFER_LMA
;
1450 find_msr_entry(to_vmx(vcpu
), MSR_EFER
)->data
|= EFER_LMA
| EFER_LME
;
1451 vmcs_write32(VM_ENTRY_CONTROLS
,
1452 vmcs_read32(VM_ENTRY_CONTROLS
)
1453 | VM_ENTRY_IA32E_MODE
);
1456 static void exit_lmode(struct kvm_vcpu
*vcpu
)
1458 vcpu
->arch
.shadow_efer
&= ~EFER_LMA
;
1460 vmcs_write32(VM_ENTRY_CONTROLS
,
1461 vmcs_read32(VM_ENTRY_CONTROLS
)
1462 & ~VM_ENTRY_IA32E_MODE
);
1467 static void vmx_flush_tlb(struct kvm_vcpu
*vcpu
)
1469 vpid_sync_vcpu_all(to_vmx(vcpu
));
1471 ept_sync_context(construct_eptp(vcpu
->arch
.mmu
.root_hpa
));
1474 static void vmx_decache_cr4_guest_bits(struct kvm_vcpu
*vcpu
)
1476 vcpu
->arch
.cr4
&= KVM_GUEST_CR4_MASK
;
1477 vcpu
->arch
.cr4
|= vmcs_readl(GUEST_CR4
) & ~KVM_GUEST_CR4_MASK
;
1480 static void ept_load_pdptrs(struct kvm_vcpu
*vcpu
)
1482 if (is_paging(vcpu
) && is_pae(vcpu
) && !is_long_mode(vcpu
)) {
1483 if (!load_pdptrs(vcpu
, vcpu
->arch
.cr3
)) {
1484 printk(KERN_ERR
"EPT: Fail to load pdptrs!\n");
1487 vmcs_write64(GUEST_PDPTR0
, vcpu
->arch
.pdptrs
[0]);
1488 vmcs_write64(GUEST_PDPTR1
, vcpu
->arch
.pdptrs
[1]);
1489 vmcs_write64(GUEST_PDPTR2
, vcpu
->arch
.pdptrs
[2]);
1490 vmcs_write64(GUEST_PDPTR3
, vcpu
->arch
.pdptrs
[3]);
1494 static void vmx_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
);
1496 static void ept_update_paging_mode_cr0(unsigned long *hw_cr0
,
1498 struct kvm_vcpu
*vcpu
)
1500 if (!(cr0
& X86_CR0_PG
)) {
1501 /* From paging/starting to nonpaging */
1502 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL
,
1503 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL
) |
1504 (CPU_BASED_CR3_LOAD_EXITING
|
1505 CPU_BASED_CR3_STORE_EXITING
));
1506 vcpu
->arch
.cr0
= cr0
;
1507 vmx_set_cr4(vcpu
, vcpu
->arch
.cr4
);
1508 *hw_cr0
|= X86_CR0_PE
| X86_CR0_PG
;
1509 *hw_cr0
&= ~X86_CR0_WP
;
1510 } else if (!is_paging(vcpu
)) {
1511 /* From nonpaging to paging */
1512 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL
,
1513 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL
) &
1514 ~(CPU_BASED_CR3_LOAD_EXITING
|
1515 CPU_BASED_CR3_STORE_EXITING
));
1516 vcpu
->arch
.cr0
= cr0
;
1517 vmx_set_cr4(vcpu
, vcpu
->arch
.cr4
);
1518 if (!(vcpu
->arch
.cr0
& X86_CR0_WP
))
1519 *hw_cr0
&= ~X86_CR0_WP
;
1523 static void ept_update_paging_mode_cr4(unsigned long *hw_cr4
,
1524 struct kvm_vcpu
*vcpu
)
1526 if (!is_paging(vcpu
)) {
1527 *hw_cr4
&= ~X86_CR4_PAE
;
1528 *hw_cr4
|= X86_CR4_PSE
;
1529 } else if (!(vcpu
->arch
.cr4
& X86_CR4_PAE
))
1530 *hw_cr4
&= ~X86_CR4_PAE
;
1533 static void vmx_set_cr0(struct kvm_vcpu
*vcpu
, unsigned long cr0
)
1535 unsigned long hw_cr0
= (cr0
& ~KVM_GUEST_CR0_MASK
) |
1536 KVM_VM_CR0_ALWAYS_ON
;
1538 vmx_fpu_deactivate(vcpu
);
1540 if (vcpu
->arch
.rmode
.active
&& (cr0
& X86_CR0_PE
))
1543 if (!vcpu
->arch
.rmode
.active
&& !(cr0
& X86_CR0_PE
))
1546 #ifdef CONFIG_X86_64
1547 if (vcpu
->arch
.shadow_efer
& EFER_LME
) {
1548 if (!is_paging(vcpu
) && (cr0
& X86_CR0_PG
))
1550 if (is_paging(vcpu
) && !(cr0
& X86_CR0_PG
))
1556 ept_update_paging_mode_cr0(&hw_cr0
, cr0
, vcpu
);
1558 vmcs_writel(CR0_READ_SHADOW
, cr0
);
1559 vmcs_writel(GUEST_CR0
, hw_cr0
);
1560 vcpu
->arch
.cr0
= cr0
;
1562 if (!(cr0
& X86_CR0_TS
) || !(cr0
& X86_CR0_PE
))
1563 vmx_fpu_activate(vcpu
);
1566 static u64
construct_eptp(unsigned long root_hpa
)
1570 /* TODO write the value reading from MSR */
1571 eptp
= VMX_EPT_DEFAULT_MT
|
1572 VMX_EPT_DEFAULT_GAW
<< VMX_EPT_GAW_EPTP_SHIFT
;
1573 eptp
|= (root_hpa
& PAGE_MASK
);
1578 static void vmx_set_cr3(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
1580 unsigned long guest_cr3
;
1584 if (vm_need_ept()) {
1585 eptp
= construct_eptp(cr3
);
1586 vmcs_write64(EPT_POINTER
, eptp
);
1587 ept_sync_context(eptp
);
1588 ept_load_pdptrs(vcpu
);
1589 guest_cr3
= is_paging(vcpu
) ? vcpu
->arch
.cr3
:
1590 VMX_EPT_IDENTITY_PAGETABLE_ADDR
;
1593 vmx_flush_tlb(vcpu
);
1594 vmcs_writel(GUEST_CR3
, guest_cr3
);
1595 if (vcpu
->arch
.cr0
& X86_CR0_PE
)
1596 vmx_fpu_deactivate(vcpu
);
1599 static void vmx_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
)
1601 unsigned long hw_cr4
= cr4
| (vcpu
->arch
.rmode
.active
?
1602 KVM_RMODE_VM_CR4_ALWAYS_ON
: KVM_PMODE_VM_CR4_ALWAYS_ON
);
1604 vcpu
->arch
.cr4
= cr4
;
1606 ept_update_paging_mode_cr4(&hw_cr4
, vcpu
);
1608 vmcs_writel(CR4_READ_SHADOW
, cr4
);
1609 vmcs_writel(GUEST_CR4
, hw_cr4
);
1612 static void vmx_set_efer(struct kvm_vcpu
*vcpu
, u64 efer
)
1614 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
1615 struct kvm_msr_entry
*msr
= find_msr_entry(vmx
, MSR_EFER
);
1617 vcpu
->arch
.shadow_efer
= efer
;
1620 if (efer
& EFER_LMA
) {
1621 vmcs_write32(VM_ENTRY_CONTROLS
,
1622 vmcs_read32(VM_ENTRY_CONTROLS
) |
1623 VM_ENTRY_IA32E_MODE
);
1627 vmcs_write32(VM_ENTRY_CONTROLS
,
1628 vmcs_read32(VM_ENTRY_CONTROLS
) &
1629 ~VM_ENTRY_IA32E_MODE
);
1631 msr
->data
= efer
& ~EFER_LME
;
1636 static u64
vmx_get_segment_base(struct kvm_vcpu
*vcpu
, int seg
)
1638 struct kvm_vmx_segment_field
*sf
= &kvm_vmx_segment_fields
[seg
];
1640 return vmcs_readl(sf
->base
);
1643 static void vmx_get_segment(struct kvm_vcpu
*vcpu
,
1644 struct kvm_segment
*var
, int seg
)
1646 struct kvm_vmx_segment_field
*sf
= &kvm_vmx_segment_fields
[seg
];
1649 var
->base
= vmcs_readl(sf
->base
);
1650 var
->limit
= vmcs_read32(sf
->limit
);
1651 var
->selector
= vmcs_read16(sf
->selector
);
1652 ar
= vmcs_read32(sf
->ar_bytes
);
1653 if ((ar
& AR_UNUSABLE_MASK
) && !emulate_invalid_guest_state
)
1655 var
->type
= ar
& 15;
1656 var
->s
= (ar
>> 4) & 1;
1657 var
->dpl
= (ar
>> 5) & 3;
1658 var
->present
= (ar
>> 7) & 1;
1659 var
->avl
= (ar
>> 12) & 1;
1660 var
->l
= (ar
>> 13) & 1;
1661 var
->db
= (ar
>> 14) & 1;
1662 var
->g
= (ar
>> 15) & 1;
1663 var
->unusable
= (ar
>> 16) & 1;
1666 static int vmx_get_cpl(struct kvm_vcpu
*vcpu
)
1668 struct kvm_segment kvm_seg
;
1670 if (!(vcpu
->arch
.cr0
& X86_CR0_PE
)) /* if real mode */
1673 if (vmx_get_rflags(vcpu
) & X86_EFLAGS_VM
) /* if virtual 8086 */
1676 vmx_get_segment(vcpu
, &kvm_seg
, VCPU_SREG_CS
);
1677 return kvm_seg
.selector
& 3;
1680 static u32
vmx_segment_access_rights(struct kvm_segment
*var
)
1687 ar
= var
->type
& 15;
1688 ar
|= (var
->s
& 1) << 4;
1689 ar
|= (var
->dpl
& 3) << 5;
1690 ar
|= (var
->present
& 1) << 7;
1691 ar
|= (var
->avl
& 1) << 12;
1692 ar
|= (var
->l
& 1) << 13;
1693 ar
|= (var
->db
& 1) << 14;
1694 ar
|= (var
->g
& 1) << 15;
1696 if (ar
== 0) /* a 0 value means unusable */
1697 ar
= AR_UNUSABLE_MASK
;
1702 static void vmx_set_segment(struct kvm_vcpu
*vcpu
,
1703 struct kvm_segment
*var
, int seg
)
1705 struct kvm_vmx_segment_field
*sf
= &kvm_vmx_segment_fields
[seg
];
1708 if (vcpu
->arch
.rmode
.active
&& seg
== VCPU_SREG_TR
) {
1709 vcpu
->arch
.rmode
.tr
.selector
= var
->selector
;
1710 vcpu
->arch
.rmode
.tr
.base
= var
->base
;
1711 vcpu
->arch
.rmode
.tr
.limit
= var
->limit
;
1712 vcpu
->arch
.rmode
.tr
.ar
= vmx_segment_access_rights(var
);
1715 vmcs_writel(sf
->base
, var
->base
);
1716 vmcs_write32(sf
->limit
, var
->limit
);
1717 vmcs_write16(sf
->selector
, var
->selector
);
1718 if (vcpu
->arch
.rmode
.active
&& var
->s
) {
1720 * Hack real-mode segments into vm86 compatibility.
1722 if (var
->base
== 0xffff0000 && var
->selector
== 0xf000)
1723 vmcs_writel(sf
->base
, 0xf0000);
1726 ar
= vmx_segment_access_rights(var
);
1727 vmcs_write32(sf
->ar_bytes
, ar
);
1730 static void vmx_get_cs_db_l_bits(struct kvm_vcpu
*vcpu
, int *db
, int *l
)
1732 u32 ar
= vmcs_read32(GUEST_CS_AR_BYTES
);
1734 *db
= (ar
>> 14) & 1;
1735 *l
= (ar
>> 13) & 1;
1738 static void vmx_get_idt(struct kvm_vcpu
*vcpu
, struct descriptor_table
*dt
)
1740 dt
->limit
= vmcs_read32(GUEST_IDTR_LIMIT
);
1741 dt
->base
= vmcs_readl(GUEST_IDTR_BASE
);
1744 static void vmx_set_idt(struct kvm_vcpu
*vcpu
, struct descriptor_table
*dt
)
1746 vmcs_write32(GUEST_IDTR_LIMIT
, dt
->limit
);
1747 vmcs_writel(GUEST_IDTR_BASE
, dt
->base
);
1750 static void vmx_get_gdt(struct kvm_vcpu
*vcpu
, struct descriptor_table
*dt
)
1752 dt
->limit
= vmcs_read32(GUEST_GDTR_LIMIT
);
1753 dt
->base
= vmcs_readl(GUEST_GDTR_BASE
);
1756 static void vmx_set_gdt(struct kvm_vcpu
*vcpu
, struct descriptor_table
*dt
)
1758 vmcs_write32(GUEST_GDTR_LIMIT
, dt
->limit
);
1759 vmcs_writel(GUEST_GDTR_BASE
, dt
->base
);
1762 static bool rmode_segment_valid(struct kvm_vcpu
*vcpu
, int seg
)
1764 struct kvm_segment var
;
1767 vmx_get_segment(vcpu
, &var
, seg
);
1768 ar
= vmx_segment_access_rights(&var
);
1770 if (var
.base
!= (var
.selector
<< 4))
1772 if (var
.limit
!= 0xffff)
1780 static bool code_segment_valid(struct kvm_vcpu
*vcpu
)
1782 struct kvm_segment cs
;
1783 unsigned int cs_rpl
;
1785 vmx_get_segment(vcpu
, &cs
, VCPU_SREG_CS
);
1786 cs_rpl
= cs
.selector
& SELECTOR_RPL_MASK
;
1790 if (~cs
.type
& (AR_TYPE_CODE_MASK
|AR_TYPE_ACCESSES_MASK
))
1794 if (cs
.type
& AR_TYPE_WRITEABLE_MASK
) {
1795 if (cs
.dpl
> cs_rpl
)
1798 if (cs
.dpl
!= cs_rpl
)
1804 /* TODO: Add Reserved field check, this'll require a new member in the kvm_segment_field structure */
1808 static bool stack_segment_valid(struct kvm_vcpu
*vcpu
)
1810 struct kvm_segment ss
;
1811 unsigned int ss_rpl
;
1813 vmx_get_segment(vcpu
, &ss
, VCPU_SREG_SS
);
1814 ss_rpl
= ss
.selector
& SELECTOR_RPL_MASK
;
1818 if (ss
.type
!= 3 && ss
.type
!= 7)
1822 if (ss
.dpl
!= ss_rpl
) /* DPL != RPL */
1830 static bool data_segment_valid(struct kvm_vcpu
*vcpu
, int seg
)
1832 struct kvm_segment var
;
1835 vmx_get_segment(vcpu
, &var
, seg
);
1836 rpl
= var
.selector
& SELECTOR_RPL_MASK
;
1844 if (~var
.type
& (AR_TYPE_CODE_MASK
|AR_TYPE_WRITEABLE_MASK
)) {
1845 if (var
.dpl
< rpl
) /* DPL < RPL */
1849 /* TODO: Add other members to kvm_segment_field to allow checking for other access
1855 static bool tr_valid(struct kvm_vcpu
*vcpu
)
1857 struct kvm_segment tr
;
1859 vmx_get_segment(vcpu
, &tr
, VCPU_SREG_TR
);
1863 if (tr
.selector
& SELECTOR_TI_MASK
) /* TI = 1 */
1865 if (tr
.type
!= 3 && tr
.type
!= 11) /* TODO: Check if guest is in IA32e mode */
1873 static bool ldtr_valid(struct kvm_vcpu
*vcpu
)
1875 struct kvm_segment ldtr
;
1877 vmx_get_segment(vcpu
, &ldtr
, VCPU_SREG_LDTR
);
1881 if (ldtr
.selector
& SELECTOR_TI_MASK
) /* TI = 1 */
1891 static bool cs_ss_rpl_check(struct kvm_vcpu
*vcpu
)
1893 struct kvm_segment cs
, ss
;
1895 vmx_get_segment(vcpu
, &cs
, VCPU_SREG_CS
);
1896 vmx_get_segment(vcpu
, &ss
, VCPU_SREG_SS
);
1898 return ((cs
.selector
& SELECTOR_RPL_MASK
) ==
1899 (ss
.selector
& SELECTOR_RPL_MASK
));
1903 * Check if guest state is valid. Returns true if valid, false if
1905 * We assume that registers are always usable
1907 static bool guest_state_valid(struct kvm_vcpu
*vcpu
)
1909 /* real mode guest state checks */
1910 if (!(vcpu
->arch
.cr0
& X86_CR0_PE
)) {
1911 if (!rmode_segment_valid(vcpu
, VCPU_SREG_CS
))
1913 if (!rmode_segment_valid(vcpu
, VCPU_SREG_SS
))
1915 if (!rmode_segment_valid(vcpu
, VCPU_SREG_DS
))
1917 if (!rmode_segment_valid(vcpu
, VCPU_SREG_ES
))
1919 if (!rmode_segment_valid(vcpu
, VCPU_SREG_FS
))
1921 if (!rmode_segment_valid(vcpu
, VCPU_SREG_GS
))
1924 /* protected mode guest state checks */
1925 if (!cs_ss_rpl_check(vcpu
))
1927 if (!code_segment_valid(vcpu
))
1929 if (!stack_segment_valid(vcpu
))
1931 if (!data_segment_valid(vcpu
, VCPU_SREG_DS
))
1933 if (!data_segment_valid(vcpu
, VCPU_SREG_ES
))
1935 if (!data_segment_valid(vcpu
, VCPU_SREG_FS
))
1937 if (!data_segment_valid(vcpu
, VCPU_SREG_GS
))
1939 if (!tr_valid(vcpu
))
1941 if (!ldtr_valid(vcpu
))
1945 * - Add checks on RIP
1946 * - Add checks on RFLAGS
1952 static int init_rmode_tss(struct kvm
*kvm
)
1954 gfn_t fn
= rmode_tss_base(kvm
) >> PAGE_SHIFT
;
1959 r
= kvm_clear_guest_page(kvm
, fn
, 0, PAGE_SIZE
);
1962 data
= TSS_BASE_SIZE
+ TSS_REDIRECTION_SIZE
;
1963 r
= kvm_write_guest_page(kvm
, fn
++, &data
,
1964 TSS_IOPB_BASE_OFFSET
, sizeof(u16
));
1967 r
= kvm_clear_guest_page(kvm
, fn
++, 0, PAGE_SIZE
);
1970 r
= kvm_clear_guest_page(kvm
, fn
, 0, PAGE_SIZE
);
1974 r
= kvm_write_guest_page(kvm
, fn
, &data
,
1975 RMODE_TSS_SIZE
- 2 * PAGE_SIZE
- 1,
1985 static int init_rmode_identity_map(struct kvm
*kvm
)
1988 pfn_t identity_map_pfn
;
1993 if (unlikely(!kvm
->arch
.ept_identity_pagetable
)) {
1994 printk(KERN_ERR
"EPT: identity-mapping pagetable "
1995 "haven't been allocated!\n");
1998 if (likely(kvm
->arch
.ept_identity_pagetable_done
))
2001 identity_map_pfn
= VMX_EPT_IDENTITY_PAGETABLE_ADDR
>> PAGE_SHIFT
;
2002 r
= kvm_clear_guest_page(kvm
, identity_map_pfn
, 0, PAGE_SIZE
);
2005 /* Set up identity-mapping pagetable for EPT in real mode */
2006 for (i
= 0; i
< PT32_ENT_PER_PAGE
; i
++) {
2007 tmp
= (i
<< 22) + (_PAGE_PRESENT
| _PAGE_RW
| _PAGE_USER
|
2008 _PAGE_ACCESSED
| _PAGE_DIRTY
| _PAGE_PSE
);
2009 r
= kvm_write_guest_page(kvm
, identity_map_pfn
,
2010 &tmp
, i
* sizeof(tmp
), sizeof(tmp
));
2014 kvm
->arch
.ept_identity_pagetable_done
= true;
2020 static void seg_setup(int seg
)
2022 struct kvm_vmx_segment_field
*sf
= &kvm_vmx_segment_fields
[seg
];
2024 vmcs_write16(sf
->selector
, 0);
2025 vmcs_writel(sf
->base
, 0);
2026 vmcs_write32(sf
->limit
, 0xffff);
2027 vmcs_write32(sf
->ar_bytes
, 0xf3);
2030 static int alloc_apic_access_page(struct kvm
*kvm
)
2032 struct kvm_userspace_memory_region kvm_userspace_mem
;
2035 down_write(&kvm
->slots_lock
);
2036 if (kvm
->arch
.apic_access_page
)
2038 kvm_userspace_mem
.slot
= APIC_ACCESS_PAGE_PRIVATE_MEMSLOT
;
2039 kvm_userspace_mem
.flags
= 0;
2040 kvm_userspace_mem
.guest_phys_addr
= 0xfee00000ULL
;
2041 kvm_userspace_mem
.memory_size
= PAGE_SIZE
;
2042 r
= __kvm_set_memory_region(kvm
, &kvm_userspace_mem
, 0);
2046 kvm
->arch
.apic_access_page
= gfn_to_page(kvm
, 0xfee00);
2048 up_write(&kvm
->slots_lock
);
2052 static int alloc_identity_pagetable(struct kvm
*kvm
)
2054 struct kvm_userspace_memory_region kvm_userspace_mem
;
2057 down_write(&kvm
->slots_lock
);
2058 if (kvm
->arch
.ept_identity_pagetable
)
2060 kvm_userspace_mem
.slot
= IDENTITY_PAGETABLE_PRIVATE_MEMSLOT
;
2061 kvm_userspace_mem
.flags
= 0;
2062 kvm_userspace_mem
.guest_phys_addr
= VMX_EPT_IDENTITY_PAGETABLE_ADDR
;
2063 kvm_userspace_mem
.memory_size
= PAGE_SIZE
;
2064 r
= __kvm_set_memory_region(kvm
, &kvm_userspace_mem
, 0);
2068 kvm
->arch
.ept_identity_pagetable
= gfn_to_page(kvm
,
2069 VMX_EPT_IDENTITY_PAGETABLE_ADDR
>> PAGE_SHIFT
);
2071 up_write(&kvm
->slots_lock
);
2075 static void allocate_vpid(struct vcpu_vmx
*vmx
)
2080 if (!enable_vpid
|| !cpu_has_vmx_vpid())
2082 spin_lock(&vmx_vpid_lock
);
2083 vpid
= find_first_zero_bit(vmx_vpid_bitmap
, VMX_NR_VPIDS
);
2084 if (vpid
< VMX_NR_VPIDS
) {
2086 __set_bit(vpid
, vmx_vpid_bitmap
);
2088 spin_unlock(&vmx_vpid_lock
);
2091 static void vmx_disable_intercept_for_msr(struct page
*msr_bitmap
, u32 msr
)
2095 if (!cpu_has_vmx_msr_bitmap())
2099 * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals
2100 * have the write-low and read-high bitmap offsets the wrong way round.
2101 * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff.
2103 va
= kmap(msr_bitmap
);
2104 if (msr
<= 0x1fff) {
2105 __clear_bit(msr
, va
+ 0x000); /* read-low */
2106 __clear_bit(msr
, va
+ 0x800); /* write-low */
2107 } else if ((msr
>= 0xc0000000) && (msr
<= 0xc0001fff)) {
2109 __clear_bit(msr
, va
+ 0x400); /* read-high */
2110 __clear_bit(msr
, va
+ 0xc00); /* write-high */
2116 * Sets up the vmcs for emulated real mode.
2118 static int vmx_vcpu_setup(struct vcpu_vmx
*vmx
)
2120 u32 host_sysenter_cs
, msr_low
, msr_high
;
2122 u64 host_pat
, tsc_this
, tsc_base
;
2124 struct descriptor_table dt
;
2126 unsigned long kvm_vmx_return
;
2130 vmcs_write64(IO_BITMAP_A
, page_to_phys(vmx_io_bitmap_a
));
2131 vmcs_write64(IO_BITMAP_B
, page_to_phys(vmx_io_bitmap_b
));
2133 if (cpu_has_vmx_msr_bitmap())
2134 vmcs_write64(MSR_BITMAP
, page_to_phys(vmx_msr_bitmap
));
2136 vmcs_write64(VMCS_LINK_POINTER
, -1ull); /* 22.3.1.5 */
2139 vmcs_write32(PIN_BASED_VM_EXEC_CONTROL
,
2140 vmcs_config
.pin_based_exec_ctrl
);
2142 exec_control
= vmcs_config
.cpu_based_exec_ctrl
;
2143 if (!vm_need_tpr_shadow(vmx
->vcpu
.kvm
)) {
2144 exec_control
&= ~CPU_BASED_TPR_SHADOW
;
2145 #ifdef CONFIG_X86_64
2146 exec_control
|= CPU_BASED_CR8_STORE_EXITING
|
2147 CPU_BASED_CR8_LOAD_EXITING
;
2151 exec_control
|= CPU_BASED_CR3_STORE_EXITING
|
2152 CPU_BASED_CR3_LOAD_EXITING
|
2153 CPU_BASED_INVLPG_EXITING
;
2154 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL
, exec_control
);
2156 if (cpu_has_secondary_exec_ctrls()) {
2157 exec_control
= vmcs_config
.cpu_based_2nd_exec_ctrl
;
2158 if (!vm_need_virtualize_apic_accesses(vmx
->vcpu
.kvm
))
2160 ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES
;
2162 exec_control
&= ~SECONDARY_EXEC_ENABLE_VPID
;
2164 exec_control
&= ~SECONDARY_EXEC_ENABLE_EPT
;
2165 vmcs_write32(SECONDARY_VM_EXEC_CONTROL
, exec_control
);
2168 vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK
, !!bypass_guest_pf
);
2169 vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH
, !!bypass_guest_pf
);
2170 vmcs_write32(CR3_TARGET_COUNT
, 0); /* 22.2.1 */
2172 vmcs_writel(HOST_CR0
, read_cr0()); /* 22.2.3 */
2173 vmcs_writel(HOST_CR4
, read_cr4()); /* 22.2.3, 22.2.5 */
2174 vmcs_writel(HOST_CR3
, read_cr3()); /* 22.2.3 FIXME: shadow tables */
2176 vmcs_write16(HOST_CS_SELECTOR
, __KERNEL_CS
); /* 22.2.4 */
2177 vmcs_write16(HOST_DS_SELECTOR
, __KERNEL_DS
); /* 22.2.4 */
2178 vmcs_write16(HOST_ES_SELECTOR
, __KERNEL_DS
); /* 22.2.4 */
2179 vmcs_write16(HOST_FS_SELECTOR
, kvm_read_fs()); /* 22.2.4 */
2180 vmcs_write16(HOST_GS_SELECTOR
, kvm_read_gs()); /* 22.2.4 */
2181 vmcs_write16(HOST_SS_SELECTOR
, __KERNEL_DS
); /* 22.2.4 */
2182 #ifdef CONFIG_X86_64
2183 rdmsrl(MSR_FS_BASE
, a
);
2184 vmcs_writel(HOST_FS_BASE
, a
); /* 22.2.4 */
2185 rdmsrl(MSR_GS_BASE
, a
);
2186 vmcs_writel(HOST_GS_BASE
, a
); /* 22.2.4 */
2188 vmcs_writel(HOST_FS_BASE
, 0); /* 22.2.4 */
2189 vmcs_writel(HOST_GS_BASE
, 0); /* 22.2.4 */
2192 vmcs_write16(HOST_TR_SELECTOR
, GDT_ENTRY_TSS
*8); /* 22.2.4 */
2195 vmcs_writel(HOST_IDTR_BASE
, dt
.base
); /* 22.2.4 */
2197 asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return
));
2198 vmcs_writel(HOST_RIP
, kvm_vmx_return
); /* 22.2.5 */
2199 vmcs_write32(VM_EXIT_MSR_STORE_COUNT
, 0);
2200 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT
, 0);
2201 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT
, 0);
2203 rdmsr(MSR_IA32_SYSENTER_CS
, host_sysenter_cs
, junk
);
2204 vmcs_write32(HOST_IA32_SYSENTER_CS
, host_sysenter_cs
);
2205 rdmsrl(MSR_IA32_SYSENTER_ESP
, a
);
2206 vmcs_writel(HOST_IA32_SYSENTER_ESP
, a
); /* 22.2.3 */
2207 rdmsrl(MSR_IA32_SYSENTER_EIP
, a
);
2208 vmcs_writel(HOST_IA32_SYSENTER_EIP
, a
); /* 22.2.3 */
2210 if (vmcs_config
.vmexit_ctrl
& VM_EXIT_LOAD_IA32_PAT
) {
2211 rdmsr(MSR_IA32_CR_PAT
, msr_low
, msr_high
);
2212 host_pat
= msr_low
| ((u64
) msr_high
<< 32);
2213 vmcs_write64(HOST_IA32_PAT
, host_pat
);
2215 if (vmcs_config
.vmentry_ctrl
& VM_ENTRY_LOAD_IA32_PAT
) {
2216 rdmsr(MSR_IA32_CR_PAT
, msr_low
, msr_high
);
2217 host_pat
= msr_low
| ((u64
) msr_high
<< 32);
2218 /* Write the default value follow host pat */
2219 vmcs_write64(GUEST_IA32_PAT
, host_pat
);
2220 /* Keep arch.pat sync with GUEST_IA32_PAT */
2221 vmx
->vcpu
.arch
.pat
= host_pat
;
2224 for (i
= 0; i
< NR_VMX_MSR
; ++i
) {
2225 u32 index
= vmx_msr_index
[i
];
2226 u32 data_low
, data_high
;
2230 if (rdmsr_safe(index
, &data_low
, &data_high
) < 0)
2232 if (wrmsr_safe(index
, data_low
, data_high
) < 0)
2234 data
= data_low
| ((u64
)data_high
<< 32);
2235 vmx
->host_msrs
[j
].index
= index
;
2236 vmx
->host_msrs
[j
].reserved
= 0;
2237 vmx
->host_msrs
[j
].data
= data
;
2238 vmx
->guest_msrs
[j
] = vmx
->host_msrs
[j
];
2242 vmcs_write32(VM_EXIT_CONTROLS
, vmcs_config
.vmexit_ctrl
);
2244 /* 22.2.1, 20.8.1 */
2245 vmcs_write32(VM_ENTRY_CONTROLS
, vmcs_config
.vmentry_ctrl
);
2247 vmcs_writel(CR0_GUEST_HOST_MASK
, ~0UL);
2248 vmcs_writel(CR4_GUEST_HOST_MASK
, KVM_GUEST_CR4_MASK
);
2250 tsc_base
= vmx
->vcpu
.kvm
->arch
.vm_init_tsc
;
2252 if (tsc_this
< vmx
->vcpu
.kvm
->arch
.vm_init_tsc
)
2253 tsc_base
= tsc_this
;
2255 guest_write_tsc(0, tsc_base
);
2260 static int init_rmode(struct kvm
*kvm
)
2262 if (!init_rmode_tss(kvm
))
2264 if (!init_rmode_identity_map(kvm
))
2269 static int vmx_vcpu_reset(struct kvm_vcpu
*vcpu
)
2271 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
2275 vcpu
->arch
.regs_avail
= ~((1 << VCPU_REGS_RIP
) | (1 << VCPU_REGS_RSP
));
2276 down_read(&vcpu
->kvm
->slots_lock
);
2277 if (!init_rmode(vmx
->vcpu
.kvm
)) {
2282 vmx
->vcpu
.arch
.rmode
.active
= 0;
2284 vmx
->soft_vnmi_blocked
= 0;
2286 vmx
->vcpu
.arch
.regs
[VCPU_REGS_RDX
] = get_rdx_init_val();
2287 kvm_set_cr8(&vmx
->vcpu
, 0);
2288 msr
= 0xfee00000 | MSR_IA32_APICBASE_ENABLE
;
2289 if (vmx
->vcpu
.vcpu_id
== 0)
2290 msr
|= MSR_IA32_APICBASE_BSP
;
2291 kvm_set_apic_base(&vmx
->vcpu
, msr
);
2293 fx_init(&vmx
->vcpu
);
2295 seg_setup(VCPU_SREG_CS
);
2297 * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode
2298 * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh.
2300 if (vmx
->vcpu
.vcpu_id
== 0) {
2301 vmcs_write16(GUEST_CS_SELECTOR
, 0xf000);
2302 vmcs_writel(GUEST_CS_BASE
, 0x000f0000);
2304 vmcs_write16(GUEST_CS_SELECTOR
, vmx
->vcpu
.arch
.sipi_vector
<< 8);
2305 vmcs_writel(GUEST_CS_BASE
, vmx
->vcpu
.arch
.sipi_vector
<< 12);
2308 seg_setup(VCPU_SREG_DS
);
2309 seg_setup(VCPU_SREG_ES
);
2310 seg_setup(VCPU_SREG_FS
);
2311 seg_setup(VCPU_SREG_GS
);
2312 seg_setup(VCPU_SREG_SS
);
2314 vmcs_write16(GUEST_TR_SELECTOR
, 0);
2315 vmcs_writel(GUEST_TR_BASE
, 0);
2316 vmcs_write32(GUEST_TR_LIMIT
, 0xffff);
2317 vmcs_write32(GUEST_TR_AR_BYTES
, 0x008b);
2319 vmcs_write16(GUEST_LDTR_SELECTOR
, 0);
2320 vmcs_writel(GUEST_LDTR_BASE
, 0);
2321 vmcs_write32(GUEST_LDTR_LIMIT
, 0xffff);
2322 vmcs_write32(GUEST_LDTR_AR_BYTES
, 0x00082);
2324 vmcs_write32(GUEST_SYSENTER_CS
, 0);
2325 vmcs_writel(GUEST_SYSENTER_ESP
, 0);
2326 vmcs_writel(GUEST_SYSENTER_EIP
, 0);
2328 vmcs_writel(GUEST_RFLAGS
, 0x02);
2329 if (vmx
->vcpu
.vcpu_id
== 0)
2330 kvm_rip_write(vcpu
, 0xfff0);
2332 kvm_rip_write(vcpu
, 0);
2333 kvm_register_write(vcpu
, VCPU_REGS_RSP
, 0);
2335 vmcs_writel(GUEST_DR7
, 0x400);
2337 vmcs_writel(GUEST_GDTR_BASE
, 0);
2338 vmcs_write32(GUEST_GDTR_LIMIT
, 0xffff);
2340 vmcs_writel(GUEST_IDTR_BASE
, 0);
2341 vmcs_write32(GUEST_IDTR_LIMIT
, 0xffff);
2343 vmcs_write32(GUEST_ACTIVITY_STATE
, 0);
2344 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO
, 0);
2345 vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS
, 0);
2347 /* Special registers */
2348 vmcs_write64(GUEST_IA32_DEBUGCTL
, 0);
2352 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD
, 0); /* 22.2.1 */
2354 if (cpu_has_vmx_tpr_shadow()) {
2355 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR
, 0);
2356 if (vm_need_tpr_shadow(vmx
->vcpu
.kvm
))
2357 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR
,
2358 page_to_phys(vmx
->vcpu
.arch
.apic
->regs_page
));
2359 vmcs_write32(TPR_THRESHOLD
, 0);
2362 if (vm_need_virtualize_apic_accesses(vmx
->vcpu
.kvm
))
2363 vmcs_write64(APIC_ACCESS_ADDR
,
2364 page_to_phys(vmx
->vcpu
.kvm
->arch
.apic_access_page
));
2367 vmcs_write16(VIRTUAL_PROCESSOR_ID
, vmx
->vpid
);
2369 vmx
->vcpu
.arch
.cr0
= 0x60000010;
2370 vmx_set_cr0(&vmx
->vcpu
, vmx
->vcpu
.arch
.cr0
); /* enter rmode */
2371 vmx_set_cr4(&vmx
->vcpu
, 0);
2372 vmx_set_efer(&vmx
->vcpu
, 0);
2373 vmx_fpu_activate(&vmx
->vcpu
);
2374 update_exception_bitmap(&vmx
->vcpu
);
2376 vpid_sync_vcpu_all(vmx
);
2380 /* HACK: Don't enable emulation on guest boot/reset */
2381 vmx
->emulation_required
= 0;
2384 up_read(&vcpu
->kvm
->slots_lock
);
2388 static void enable_irq_window(struct kvm_vcpu
*vcpu
)
2390 u32 cpu_based_vm_exec_control
;
2392 cpu_based_vm_exec_control
= vmcs_read32(CPU_BASED_VM_EXEC_CONTROL
);
2393 cpu_based_vm_exec_control
|= CPU_BASED_VIRTUAL_INTR_PENDING
;
2394 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL
, cpu_based_vm_exec_control
);
2397 static void enable_nmi_window(struct kvm_vcpu
*vcpu
)
2399 u32 cpu_based_vm_exec_control
;
2401 if (!cpu_has_virtual_nmis()) {
2402 enable_irq_window(vcpu
);
2406 cpu_based_vm_exec_control
= vmcs_read32(CPU_BASED_VM_EXEC_CONTROL
);
2407 cpu_based_vm_exec_control
|= CPU_BASED_VIRTUAL_NMI_PENDING
;
2408 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL
, cpu_based_vm_exec_control
);
2411 static void vmx_inject_irq(struct kvm_vcpu
*vcpu
, int irq
)
2413 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
2415 KVMTRACE_1D(INJ_VIRQ
, vcpu
, (u32
)irq
, handler
);
2417 ++vcpu
->stat
.irq_injections
;
2418 if (vcpu
->arch
.rmode
.active
) {
2419 vmx
->rmode
.irq
.pending
= true;
2420 vmx
->rmode
.irq
.vector
= irq
;
2421 vmx
->rmode
.irq
.rip
= kvm_rip_read(vcpu
);
2422 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD
,
2423 irq
| INTR_TYPE_SOFT_INTR
| INTR_INFO_VALID_MASK
);
2424 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN
, 1);
2425 kvm_rip_write(vcpu
, vmx
->rmode
.irq
.rip
- 1);
2428 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD
,
2429 irq
| INTR_TYPE_EXT_INTR
| INTR_INFO_VALID_MASK
);
2432 static void vmx_inject_nmi(struct kvm_vcpu
*vcpu
)
2434 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
2436 if (!cpu_has_virtual_nmis()) {
2438 * Tracking the NMI-blocked state in software is built upon
2439 * finding the next open IRQ window. This, in turn, depends on
2440 * well-behaving guests: They have to keep IRQs disabled at
2441 * least as long as the NMI handler runs. Otherwise we may
2442 * cause NMI nesting, maybe breaking the guest. But as this is
2443 * highly unlikely, we can live with the residual risk.
2445 vmx
->soft_vnmi_blocked
= 1;
2446 vmx
->vnmi_blocked_time
= 0;
2449 ++vcpu
->stat
.nmi_injections
;
2450 if (vcpu
->arch
.rmode
.active
) {
2451 vmx
->rmode
.irq
.pending
= true;
2452 vmx
->rmode
.irq
.vector
= NMI_VECTOR
;
2453 vmx
->rmode
.irq
.rip
= kvm_rip_read(vcpu
);
2454 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD
,
2455 NMI_VECTOR
| INTR_TYPE_SOFT_INTR
|
2456 INTR_INFO_VALID_MASK
);
2457 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN
, 1);
2458 kvm_rip_write(vcpu
, vmx
->rmode
.irq
.rip
- 1);
2461 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD
,
2462 INTR_TYPE_NMI_INTR
| INTR_INFO_VALID_MASK
| NMI_VECTOR
);
2465 static void vmx_update_window_states(struct kvm_vcpu
*vcpu
)
2467 u32 guest_intr
= vmcs_read32(GUEST_INTERRUPTIBILITY_INFO
);
2469 vcpu
->arch
.nmi_window_open
=
2470 !(guest_intr
& (GUEST_INTR_STATE_STI
|
2471 GUEST_INTR_STATE_MOV_SS
|
2472 GUEST_INTR_STATE_NMI
));
2473 if (!cpu_has_virtual_nmis() && to_vmx(vcpu
)->soft_vnmi_blocked
)
2474 vcpu
->arch
.nmi_window_open
= 0;
2476 vcpu
->arch
.interrupt_window_open
=
2477 ((vmcs_readl(GUEST_RFLAGS
) & X86_EFLAGS_IF
) &&
2478 !(guest_intr
& (GUEST_INTR_STATE_STI
|
2479 GUEST_INTR_STATE_MOV_SS
)));
2482 static void kvm_do_inject_irq(struct kvm_vcpu
*vcpu
)
2484 int word_index
= __ffs(vcpu
->arch
.irq_summary
);
2485 int bit_index
= __ffs(vcpu
->arch
.irq_pending
[word_index
]);
2486 int irq
= word_index
* BITS_PER_LONG
+ bit_index
;
2488 clear_bit(bit_index
, &vcpu
->arch
.irq_pending
[word_index
]);
2489 if (!vcpu
->arch
.irq_pending
[word_index
])
2490 clear_bit(word_index
, &vcpu
->arch
.irq_summary
);
2491 kvm_queue_interrupt(vcpu
, irq
);
2494 static void do_interrupt_requests(struct kvm_vcpu
*vcpu
,
2495 struct kvm_run
*kvm_run
)
2497 vmx_update_window_states(vcpu
);
2499 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
)
2500 vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO
,
2501 GUEST_INTR_STATE_STI
|
2502 GUEST_INTR_STATE_MOV_SS
);
2504 if (vcpu
->arch
.nmi_pending
&& !vcpu
->arch
.nmi_injected
) {
2505 if (vcpu
->arch
.interrupt
.pending
) {
2506 enable_nmi_window(vcpu
);
2507 } else if (vcpu
->arch
.nmi_window_open
) {
2508 vcpu
->arch
.nmi_pending
= false;
2509 vcpu
->arch
.nmi_injected
= true;
2511 enable_nmi_window(vcpu
);
2515 if (vcpu
->arch
.nmi_injected
) {
2516 vmx_inject_nmi(vcpu
);
2517 if (vcpu
->arch
.nmi_pending
)
2518 enable_nmi_window(vcpu
);
2519 else if (vcpu
->arch
.irq_summary
2520 || kvm_run
->request_interrupt_window
)
2521 enable_irq_window(vcpu
);
2525 if (vcpu
->arch
.interrupt_window_open
) {
2526 if (vcpu
->arch
.irq_summary
&& !vcpu
->arch
.interrupt
.pending
)
2527 kvm_do_inject_irq(vcpu
);
2529 if (vcpu
->arch
.interrupt
.pending
)
2530 vmx_inject_irq(vcpu
, vcpu
->arch
.interrupt
.nr
);
2532 if (!vcpu
->arch
.interrupt_window_open
&&
2533 (vcpu
->arch
.irq_summary
|| kvm_run
->request_interrupt_window
))
2534 enable_irq_window(vcpu
);
2537 static int vmx_set_tss_addr(struct kvm
*kvm
, unsigned int addr
)
2540 struct kvm_userspace_memory_region tss_mem
= {
2541 .slot
= TSS_PRIVATE_MEMSLOT
,
2542 .guest_phys_addr
= addr
,
2543 .memory_size
= PAGE_SIZE
* 3,
2547 ret
= kvm_set_memory_region(kvm
, &tss_mem
, 0);
2550 kvm
->arch
.tss_addr
= addr
;
2554 static int handle_rmode_exception(struct kvm_vcpu
*vcpu
,
2555 int vec
, u32 err_code
)
2558 * Instruction with address size override prefix opcode 0x67
2559 * Cause the #SS fault with 0 error code in VM86 mode.
2561 if (((vec
== GP_VECTOR
) || (vec
== SS_VECTOR
)) && err_code
== 0)
2562 if (emulate_instruction(vcpu
, NULL
, 0, 0, 0) == EMULATE_DONE
)
2565 * Forward all other exceptions that are valid in real mode.
2566 * FIXME: Breaks guest debugging in real mode, needs to be fixed with
2567 * the required debugging infrastructure rework.
2571 if (vcpu
->guest_debug
&
2572 (KVM_GUESTDBG_SINGLESTEP
| KVM_GUESTDBG_USE_HW_BP
))
2574 kvm_queue_exception(vcpu
, vec
);
2577 if (vcpu
->guest_debug
& KVM_GUESTDBG_USE_SW_BP
)
2588 kvm_queue_exception(vcpu
, vec
);
2594 static int handle_exception(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2596 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
2597 u32 intr_info
, ex_no
, error_code
;
2598 unsigned long cr2
, rip
, dr6
;
2600 enum emulation_result er
;
2602 vect_info
= vmx
->idt_vectoring_info
;
2603 intr_info
= vmcs_read32(VM_EXIT_INTR_INFO
);
2605 if ((vect_info
& VECTORING_INFO_VALID_MASK
) &&
2606 !is_page_fault(intr_info
))
2607 printk(KERN_ERR
"%s: unexpected, vectoring info 0x%x "
2608 "intr info 0x%x\n", __func__
, vect_info
, intr_info
);
2610 if (!irqchip_in_kernel(vcpu
->kvm
) && is_external_interrupt(vect_info
)) {
2611 int irq
= vect_info
& VECTORING_INFO_VECTOR_MASK
;
2612 set_bit(irq
, vcpu
->arch
.irq_pending
);
2613 set_bit(irq
/ BITS_PER_LONG
, &vcpu
->arch
.irq_summary
);
2616 if ((intr_info
& INTR_INFO_INTR_TYPE_MASK
) == INTR_TYPE_NMI_INTR
)
2617 return 1; /* already handled by vmx_vcpu_run() */
2619 if (is_no_device(intr_info
)) {
2620 vmx_fpu_activate(vcpu
);
2624 if (is_invalid_opcode(intr_info
)) {
2625 er
= emulate_instruction(vcpu
, kvm_run
, 0, 0, EMULTYPE_TRAP_UD
);
2626 if (er
!= EMULATE_DONE
)
2627 kvm_queue_exception(vcpu
, UD_VECTOR
);
2632 rip
= kvm_rip_read(vcpu
);
2633 if (intr_info
& INTR_INFO_DELIVER_CODE_MASK
)
2634 error_code
= vmcs_read32(VM_EXIT_INTR_ERROR_CODE
);
2635 if (is_page_fault(intr_info
)) {
2636 /* EPT won't cause page fault directly */
2639 cr2
= vmcs_readl(EXIT_QUALIFICATION
);
2640 KVMTRACE_3D(PAGE_FAULT
, vcpu
, error_code
, (u32
)cr2
,
2641 (u32
)((u64
)cr2
>> 32), handler
);
2642 if (vcpu
->arch
.interrupt
.pending
|| vcpu
->arch
.exception
.pending
)
2643 kvm_mmu_unprotect_page_virt(vcpu
, cr2
);
2644 return kvm_mmu_page_fault(vcpu
, cr2
, error_code
);
2647 if (vcpu
->arch
.rmode
.active
&&
2648 handle_rmode_exception(vcpu
, intr_info
& INTR_INFO_VECTOR_MASK
,
2650 if (vcpu
->arch
.halt_request
) {
2651 vcpu
->arch
.halt_request
= 0;
2652 return kvm_emulate_halt(vcpu
);
2657 ex_no
= intr_info
& INTR_INFO_VECTOR_MASK
;
2660 dr6
= vmcs_readl(EXIT_QUALIFICATION
);
2661 if (!(vcpu
->guest_debug
&
2662 (KVM_GUESTDBG_SINGLESTEP
| KVM_GUESTDBG_USE_HW_BP
))) {
2663 vcpu
->arch
.dr6
= dr6
| DR6_FIXED_1
;
2664 kvm_queue_exception(vcpu
, DB_VECTOR
);
2667 kvm_run
->debug
.arch
.dr6
= dr6
| DR6_FIXED_1
;
2668 kvm_run
->debug
.arch
.dr7
= vmcs_readl(GUEST_DR7
);
2671 kvm_run
->exit_reason
= KVM_EXIT_DEBUG
;
2672 kvm_run
->debug
.arch
.pc
= vmcs_readl(GUEST_CS_BASE
) + rip
;
2673 kvm_run
->debug
.arch
.exception
= ex_no
;
2676 kvm_run
->exit_reason
= KVM_EXIT_EXCEPTION
;
2677 kvm_run
->ex
.exception
= ex_no
;
2678 kvm_run
->ex
.error_code
= error_code
;
2684 static int handle_external_interrupt(struct kvm_vcpu
*vcpu
,
2685 struct kvm_run
*kvm_run
)
2687 ++vcpu
->stat
.irq_exits
;
2688 KVMTRACE_1D(INTR
, vcpu
, vmcs_read32(VM_EXIT_INTR_INFO
), handler
);
2692 static int handle_triple_fault(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2694 kvm_run
->exit_reason
= KVM_EXIT_SHUTDOWN
;
2698 static int handle_io(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2700 unsigned long exit_qualification
;
2701 int size
, down
, in
, string
, rep
;
2704 ++vcpu
->stat
.io_exits
;
2705 exit_qualification
= vmcs_readl(EXIT_QUALIFICATION
);
2706 string
= (exit_qualification
& 16) != 0;
2709 if (emulate_instruction(vcpu
,
2710 kvm_run
, 0, 0, 0) == EMULATE_DO_MMIO
)
2715 size
= (exit_qualification
& 7) + 1;
2716 in
= (exit_qualification
& 8) != 0;
2717 down
= (vmcs_readl(GUEST_RFLAGS
) & X86_EFLAGS_DF
) != 0;
2718 rep
= (exit_qualification
& 32) != 0;
2719 port
= exit_qualification
>> 16;
2721 skip_emulated_instruction(vcpu
);
2722 return kvm_emulate_pio(vcpu
, kvm_run
, in
, size
, port
);
2726 vmx_patch_hypercall(struct kvm_vcpu
*vcpu
, unsigned char *hypercall
)
2729 * Patch in the VMCALL instruction:
2731 hypercall
[0] = 0x0f;
2732 hypercall
[1] = 0x01;
2733 hypercall
[2] = 0xc1;
2736 static int handle_cr(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2738 unsigned long exit_qualification
;
2742 exit_qualification
= vmcs_readl(EXIT_QUALIFICATION
);
2743 cr
= exit_qualification
& 15;
2744 reg
= (exit_qualification
>> 8) & 15;
2745 switch ((exit_qualification
>> 4) & 3) {
2746 case 0: /* mov to cr */
2747 KVMTRACE_3D(CR_WRITE
, vcpu
, (u32
)cr
,
2748 (u32
)kvm_register_read(vcpu
, reg
),
2749 (u32
)((u64
)kvm_register_read(vcpu
, reg
) >> 32),
2753 kvm_set_cr0(vcpu
, kvm_register_read(vcpu
, reg
));
2754 skip_emulated_instruction(vcpu
);
2757 kvm_set_cr3(vcpu
, kvm_register_read(vcpu
, reg
));
2758 skip_emulated_instruction(vcpu
);
2761 kvm_set_cr4(vcpu
, kvm_register_read(vcpu
, reg
));
2762 skip_emulated_instruction(vcpu
);
2765 kvm_set_cr8(vcpu
, kvm_register_read(vcpu
, reg
));
2766 skip_emulated_instruction(vcpu
);
2767 if (irqchip_in_kernel(vcpu
->kvm
))
2769 kvm_run
->exit_reason
= KVM_EXIT_SET_TPR
;
2774 vmx_fpu_deactivate(vcpu
);
2775 vcpu
->arch
.cr0
&= ~X86_CR0_TS
;
2776 vmcs_writel(CR0_READ_SHADOW
, vcpu
->arch
.cr0
);
2777 vmx_fpu_activate(vcpu
);
2778 KVMTRACE_0D(CLTS
, vcpu
, handler
);
2779 skip_emulated_instruction(vcpu
);
2781 case 1: /*mov from cr*/
2784 kvm_register_write(vcpu
, reg
, vcpu
->arch
.cr3
);
2785 KVMTRACE_3D(CR_READ
, vcpu
, (u32
)cr
,
2786 (u32
)kvm_register_read(vcpu
, reg
),
2787 (u32
)((u64
)kvm_register_read(vcpu
, reg
) >> 32),
2789 skip_emulated_instruction(vcpu
);
2792 kvm_register_write(vcpu
, reg
, kvm_get_cr8(vcpu
));
2793 KVMTRACE_2D(CR_READ
, vcpu
, (u32
)cr
,
2794 (u32
)kvm_register_read(vcpu
, reg
), handler
);
2795 skip_emulated_instruction(vcpu
);
2800 kvm_lmsw(vcpu
, (exit_qualification
>> LMSW_SOURCE_DATA_SHIFT
) & 0x0f);
2802 skip_emulated_instruction(vcpu
);
2807 kvm_run
->exit_reason
= 0;
2808 pr_unimpl(vcpu
, "unhandled control register: op %d cr %d\n",
2809 (int)(exit_qualification
>> 4) & 3, cr
);
2813 static int handle_dr(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2815 unsigned long exit_qualification
;
2819 dr
= vmcs_readl(GUEST_DR7
);
2822 * As the vm-exit takes precedence over the debug trap, we
2823 * need to emulate the latter, either for the host or the
2824 * guest debugging itself.
2826 if (vcpu
->guest_debug
& KVM_GUESTDBG_USE_HW_BP
) {
2827 kvm_run
->debug
.arch
.dr6
= vcpu
->arch
.dr6
;
2828 kvm_run
->debug
.arch
.dr7
= dr
;
2829 kvm_run
->debug
.arch
.pc
=
2830 vmcs_readl(GUEST_CS_BASE
) +
2831 vmcs_readl(GUEST_RIP
);
2832 kvm_run
->debug
.arch
.exception
= DB_VECTOR
;
2833 kvm_run
->exit_reason
= KVM_EXIT_DEBUG
;
2836 vcpu
->arch
.dr7
&= ~DR7_GD
;
2837 vcpu
->arch
.dr6
|= DR6_BD
;
2838 vmcs_writel(GUEST_DR7
, vcpu
->arch
.dr7
);
2839 kvm_queue_exception(vcpu
, DB_VECTOR
);
2844 exit_qualification
= vmcs_readl(EXIT_QUALIFICATION
);
2845 dr
= exit_qualification
& DEBUG_REG_ACCESS_NUM
;
2846 reg
= DEBUG_REG_ACCESS_REG(exit_qualification
);
2847 if (exit_qualification
& TYPE_MOV_FROM_DR
) {
2850 val
= vcpu
->arch
.db
[dr
];
2853 val
= vcpu
->arch
.dr6
;
2856 val
= vcpu
->arch
.dr7
;
2861 kvm_register_write(vcpu
, reg
, val
);
2862 KVMTRACE_2D(DR_READ
, vcpu
, (u32
)dr
, (u32
)val
, handler
);
2864 val
= vcpu
->arch
.regs
[reg
];
2867 vcpu
->arch
.db
[dr
] = val
;
2868 if (!(vcpu
->guest_debug
& KVM_GUESTDBG_USE_HW_BP
))
2869 vcpu
->arch
.eff_db
[dr
] = val
;
2872 if (vcpu
->arch
.cr4
& X86_CR4_DE
)
2873 kvm_queue_exception(vcpu
, UD_VECTOR
);
2876 if (val
& 0xffffffff00000000ULL
) {
2877 kvm_queue_exception(vcpu
, GP_VECTOR
);
2880 vcpu
->arch
.dr6
= (val
& DR6_VOLATILE
) | DR6_FIXED_1
;
2883 if (val
& 0xffffffff00000000ULL
) {
2884 kvm_queue_exception(vcpu
, GP_VECTOR
);
2887 vcpu
->arch
.dr7
= (val
& DR7_VOLATILE
) | DR7_FIXED_1
;
2888 if (!(vcpu
->guest_debug
& KVM_GUESTDBG_USE_HW_BP
)) {
2889 vmcs_writel(GUEST_DR7
, vcpu
->arch
.dr7
);
2890 vcpu
->arch
.switch_db_regs
=
2891 (val
& DR7_BP_EN_MASK
);
2895 KVMTRACE_2D(DR_WRITE
, vcpu
, (u32
)dr
, (u32
)val
, handler
);
2897 skip_emulated_instruction(vcpu
);
2901 static int handle_cpuid(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2903 kvm_emulate_cpuid(vcpu
);
2907 static int handle_rdmsr(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2909 u32 ecx
= vcpu
->arch
.regs
[VCPU_REGS_RCX
];
2912 if (vmx_get_msr(vcpu
, ecx
, &data
)) {
2913 kvm_inject_gp(vcpu
, 0);
2917 KVMTRACE_3D(MSR_READ
, vcpu
, ecx
, (u32
)data
, (u32
)(data
>> 32),
2920 /* FIXME: handling of bits 32:63 of rax, rdx */
2921 vcpu
->arch
.regs
[VCPU_REGS_RAX
] = data
& -1u;
2922 vcpu
->arch
.regs
[VCPU_REGS_RDX
] = (data
>> 32) & -1u;
2923 skip_emulated_instruction(vcpu
);
2927 static int handle_wrmsr(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2929 u32 ecx
= vcpu
->arch
.regs
[VCPU_REGS_RCX
];
2930 u64 data
= (vcpu
->arch
.regs
[VCPU_REGS_RAX
] & -1u)
2931 | ((u64
)(vcpu
->arch
.regs
[VCPU_REGS_RDX
] & -1u) << 32);
2933 KVMTRACE_3D(MSR_WRITE
, vcpu
, ecx
, (u32
)data
, (u32
)(data
>> 32),
2936 if (vmx_set_msr(vcpu
, ecx
, data
) != 0) {
2937 kvm_inject_gp(vcpu
, 0);
2941 skip_emulated_instruction(vcpu
);
2945 static int handle_tpr_below_threshold(struct kvm_vcpu
*vcpu
,
2946 struct kvm_run
*kvm_run
)
2951 static int handle_interrupt_window(struct kvm_vcpu
*vcpu
,
2952 struct kvm_run
*kvm_run
)
2954 u32 cpu_based_vm_exec_control
;
2956 /* clear pending irq */
2957 cpu_based_vm_exec_control
= vmcs_read32(CPU_BASED_VM_EXEC_CONTROL
);
2958 cpu_based_vm_exec_control
&= ~CPU_BASED_VIRTUAL_INTR_PENDING
;
2959 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL
, cpu_based_vm_exec_control
);
2961 KVMTRACE_0D(PEND_INTR
, vcpu
, handler
);
2962 ++vcpu
->stat
.irq_window_exits
;
2965 * If the user space waits to inject interrupts, exit as soon as
2968 if (kvm_run
->request_interrupt_window
&&
2969 !vcpu
->arch
.irq_summary
) {
2970 kvm_run
->exit_reason
= KVM_EXIT_IRQ_WINDOW_OPEN
;
2976 static int handle_halt(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2978 skip_emulated_instruction(vcpu
);
2979 return kvm_emulate_halt(vcpu
);
2982 static int handle_vmcall(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2984 skip_emulated_instruction(vcpu
);
2985 kvm_emulate_hypercall(vcpu
);
2989 static int handle_invlpg(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2991 u64 exit_qualification
= vmcs_read64(EXIT_QUALIFICATION
);
2993 kvm_mmu_invlpg(vcpu
, exit_qualification
);
2994 skip_emulated_instruction(vcpu
);
2998 static int handle_wbinvd(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3000 skip_emulated_instruction(vcpu
);
3001 /* TODO: Add support for VT-d/pass-through device */
3005 static int handle_apic_access(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3007 u64 exit_qualification
;
3008 enum emulation_result er
;
3009 unsigned long offset
;
3011 exit_qualification
= vmcs_read64(EXIT_QUALIFICATION
);
3012 offset
= exit_qualification
& 0xffful
;
3014 er
= emulate_instruction(vcpu
, kvm_run
, 0, 0, 0);
3016 if (er
!= EMULATE_DONE
) {
3018 "Fail to handle apic access vmexit! Offset is 0x%lx\n",
3025 static int handle_task_switch(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3027 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
3028 unsigned long exit_qualification
;
3032 exit_qualification
= vmcs_readl(EXIT_QUALIFICATION
);
3034 reason
= (u32
)exit_qualification
>> 30;
3035 if (reason
== TASK_SWITCH_GATE
&& vmx
->vcpu
.arch
.nmi_injected
&&
3036 (vmx
->idt_vectoring_info
& VECTORING_INFO_VALID_MASK
) &&
3037 (vmx
->idt_vectoring_info
& VECTORING_INFO_TYPE_MASK
)
3038 == INTR_TYPE_NMI_INTR
) {
3039 vcpu
->arch
.nmi_injected
= false;
3040 if (cpu_has_virtual_nmis())
3041 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO
,
3042 GUEST_INTR_STATE_NMI
);
3044 tss_selector
= exit_qualification
;
3046 if (!kvm_task_switch(vcpu
, tss_selector
, reason
))
3049 /* clear all local breakpoint enable flags */
3050 vmcs_writel(GUEST_DR7
, vmcs_readl(GUEST_DR7
) & ~55);
3053 * TODO: What about debug traps on tss switch?
3054 * Are we supposed to inject them and update dr6?
3060 static int handle_ept_violation(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3062 u64 exit_qualification
;
3063 enum emulation_result er
;
3069 exit_qualification
= vmcs_read64(EXIT_QUALIFICATION
);
3071 if (exit_qualification
& (1 << 6)) {
3072 printk(KERN_ERR
"EPT: GPA exceeds GAW!\n");
3076 gla_validity
= (exit_qualification
>> 7) & 0x3;
3077 if (gla_validity
!= 0x3 && gla_validity
!= 0x1 && gla_validity
!= 0) {
3078 printk(KERN_ERR
"EPT: Handling EPT violation failed!\n");
3079 printk(KERN_ERR
"EPT: GPA: 0x%lx, GVA: 0x%lx\n",
3080 (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS
),
3081 (long unsigned int)vmcs_read64(GUEST_LINEAR_ADDRESS
));
3082 printk(KERN_ERR
"EPT: Exit qualification is 0x%lx\n",
3083 (long unsigned int)exit_qualification
);
3084 kvm_run
->exit_reason
= KVM_EXIT_UNKNOWN
;
3085 kvm_run
->hw
.hardware_exit_reason
= 0;
3089 gpa
= vmcs_read64(GUEST_PHYSICAL_ADDRESS
);
3090 hva
= gfn_to_hva(vcpu
->kvm
, gpa
>> PAGE_SHIFT
);
3091 if (!kvm_is_error_hva(hva
)) {
3092 r
= kvm_mmu_page_fault(vcpu
, gpa
& PAGE_MASK
, 0);
3094 printk(KERN_ERR
"EPT: Not enough memory!\n");
3100 er
= emulate_instruction(vcpu
, kvm_run
, 0, 0, 0);
3102 if (er
== EMULATE_FAIL
) {
3104 "EPT: Fail to handle EPT violation vmexit!er is %d\n",
3106 printk(KERN_ERR
"EPT: GPA: 0x%lx, GVA: 0x%lx\n",
3107 (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS
),
3108 (long unsigned int)vmcs_read64(GUEST_LINEAR_ADDRESS
));
3109 printk(KERN_ERR
"EPT: Exit qualification is 0x%lx\n",
3110 (long unsigned int)exit_qualification
);
3112 } else if (er
== EMULATE_DO_MMIO
)
3118 static int handle_nmi_window(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3120 u32 cpu_based_vm_exec_control
;
3122 /* clear pending NMI */
3123 cpu_based_vm_exec_control
= vmcs_read32(CPU_BASED_VM_EXEC_CONTROL
);
3124 cpu_based_vm_exec_control
&= ~CPU_BASED_VIRTUAL_NMI_PENDING
;
3125 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL
, cpu_based_vm_exec_control
);
3126 ++vcpu
->stat
.nmi_window_exits
;
3131 static void handle_invalid_guest_state(struct kvm_vcpu
*vcpu
,
3132 struct kvm_run
*kvm_run
)
3134 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
3135 enum emulation_result err
= EMULATE_DONE
;
3140 while (!guest_state_valid(vcpu
)) {
3141 err
= emulate_instruction(vcpu
, kvm_run
, 0, 0, 0);
3143 if (err
== EMULATE_DO_MMIO
)
3146 if (err
!= EMULATE_DONE
) {
3147 kvm_report_emulation_failure(vcpu
, "emulation failure");
3151 if (signal_pending(current
))
3157 local_irq_disable();
3160 vmx
->invalid_state_emulation_result
= err
;
3164 * The exit handlers return 1 if the exit was handled fully and guest execution
3165 * may resume. Otherwise they set the kvm_run parameter to indicate what needs
3166 * to be done to userspace and return 0.
3168 static int (*kvm_vmx_exit_handlers
[])(struct kvm_vcpu
*vcpu
,
3169 struct kvm_run
*kvm_run
) = {
3170 [EXIT_REASON_EXCEPTION_NMI
] = handle_exception
,
3171 [EXIT_REASON_EXTERNAL_INTERRUPT
] = handle_external_interrupt
,
3172 [EXIT_REASON_TRIPLE_FAULT
] = handle_triple_fault
,
3173 [EXIT_REASON_NMI_WINDOW
] = handle_nmi_window
,
3174 [EXIT_REASON_IO_INSTRUCTION
] = handle_io
,
3175 [EXIT_REASON_CR_ACCESS
] = handle_cr
,
3176 [EXIT_REASON_DR_ACCESS
] = handle_dr
,
3177 [EXIT_REASON_CPUID
] = handle_cpuid
,
3178 [EXIT_REASON_MSR_READ
] = handle_rdmsr
,
3179 [EXIT_REASON_MSR_WRITE
] = handle_wrmsr
,
3180 [EXIT_REASON_PENDING_INTERRUPT
] = handle_interrupt_window
,
3181 [EXIT_REASON_HLT
] = handle_halt
,
3182 [EXIT_REASON_INVLPG
] = handle_invlpg
,
3183 [EXIT_REASON_VMCALL
] = handle_vmcall
,
3184 [EXIT_REASON_TPR_BELOW_THRESHOLD
] = handle_tpr_below_threshold
,
3185 [EXIT_REASON_APIC_ACCESS
] = handle_apic_access
,
3186 [EXIT_REASON_WBINVD
] = handle_wbinvd
,
3187 [EXIT_REASON_TASK_SWITCH
] = handle_task_switch
,
3188 [EXIT_REASON_EPT_VIOLATION
] = handle_ept_violation
,
3191 static const int kvm_vmx_max_exit_handlers
=
3192 ARRAY_SIZE(kvm_vmx_exit_handlers
);
3195 * The guest has exited. See if we can fix it or if we need userspace
3198 static int kvm_handle_exit(struct kvm_run
*kvm_run
, struct kvm_vcpu
*vcpu
)
3200 u32 exit_reason
= vmcs_read32(VM_EXIT_REASON
);
3201 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
3202 u32 vectoring_info
= vmx
->idt_vectoring_info
;
3204 KVMTRACE_3D(VMEXIT
, vcpu
, exit_reason
, (u32
)kvm_rip_read(vcpu
),
3205 (u32
)((u64
)kvm_rip_read(vcpu
) >> 32), entryexit
);
3207 /* If we need to emulate an MMIO from handle_invalid_guest_state
3208 * we just return 0 */
3209 if (vmx
->emulation_required
&& emulate_invalid_guest_state
) {
3210 if (guest_state_valid(vcpu
))
3211 vmx
->emulation_required
= 0;
3212 return vmx
->invalid_state_emulation_result
!= EMULATE_DO_MMIO
;
3215 /* Access CR3 don't cause VMExit in paging mode, so we need
3216 * to sync with guest real CR3. */
3217 if (vm_need_ept() && is_paging(vcpu
)) {
3218 vcpu
->arch
.cr3
= vmcs_readl(GUEST_CR3
);
3219 ept_load_pdptrs(vcpu
);
3222 if (unlikely(vmx
->fail
)) {
3223 kvm_run
->exit_reason
= KVM_EXIT_FAIL_ENTRY
;
3224 kvm_run
->fail_entry
.hardware_entry_failure_reason
3225 = vmcs_read32(VM_INSTRUCTION_ERROR
);
3229 if ((vectoring_info
& VECTORING_INFO_VALID_MASK
) &&
3230 (exit_reason
!= EXIT_REASON_EXCEPTION_NMI
&&
3231 exit_reason
!= EXIT_REASON_EPT_VIOLATION
&&
3232 exit_reason
!= EXIT_REASON_TASK_SWITCH
))
3233 printk(KERN_WARNING
"%s: unexpected, valid vectoring info "
3234 "(0x%x) and exit reason is 0x%x\n",
3235 __func__
, vectoring_info
, exit_reason
);
3237 if (unlikely(!cpu_has_virtual_nmis() && vmx
->soft_vnmi_blocked
)) {
3238 if (vcpu
->arch
.interrupt_window_open
) {
3239 vmx
->soft_vnmi_blocked
= 0;
3240 vcpu
->arch
.nmi_window_open
= 1;
3241 } else if (vmx
->vnmi_blocked_time
> 1000000000LL &&
3242 vcpu
->arch
.nmi_pending
) {
3244 * This CPU don't support us in finding the end of an
3245 * NMI-blocked window if the guest runs with IRQs
3246 * disabled. So we pull the trigger after 1 s of
3247 * futile waiting, but inform the user about this.
3249 printk(KERN_WARNING
"%s: Breaking out of NMI-blocked "
3250 "state on VCPU %d after 1 s timeout\n",
3251 __func__
, vcpu
->vcpu_id
);
3252 vmx
->soft_vnmi_blocked
= 0;
3253 vmx
->vcpu
.arch
.nmi_window_open
= 1;
3257 if (exit_reason
< kvm_vmx_max_exit_handlers
3258 && kvm_vmx_exit_handlers
[exit_reason
])
3259 return kvm_vmx_exit_handlers
[exit_reason
](vcpu
, kvm_run
);
3261 kvm_run
->exit_reason
= KVM_EXIT_UNKNOWN
;
3262 kvm_run
->hw
.hardware_exit_reason
= exit_reason
;
3267 static void update_tpr_threshold(struct kvm_vcpu
*vcpu
)
3271 if (!vm_need_tpr_shadow(vcpu
->kvm
))
3274 if (!kvm_lapic_enabled(vcpu
) ||
3275 ((max_irr
= kvm_lapic_find_highest_irr(vcpu
)) == -1)) {
3276 vmcs_write32(TPR_THRESHOLD
, 0);
3280 tpr
= (kvm_lapic_get_cr8(vcpu
) & 0x0f) << 4;
3281 vmcs_write32(TPR_THRESHOLD
, (max_irr
> tpr
) ? tpr
>> 4 : max_irr
>> 4);
3284 static void vmx_complete_interrupts(struct vcpu_vmx
*vmx
)
3287 u32 idt_vectoring_info
;
3291 bool idtv_info_valid
;
3294 exit_intr_info
= vmcs_read32(VM_EXIT_INTR_INFO
);
3295 if (cpu_has_virtual_nmis()) {
3296 unblock_nmi
= (exit_intr_info
& INTR_INFO_UNBLOCK_NMI
) != 0;
3297 vector
= exit_intr_info
& INTR_INFO_VECTOR_MASK
;
3300 * Re-set bit "block by NMI" before VM entry if vmexit caused by
3301 * a guest IRET fault.
3303 if (unblock_nmi
&& vector
!= DF_VECTOR
)
3304 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO
,
3305 GUEST_INTR_STATE_NMI
);
3306 } else if (unlikely(vmx
->soft_vnmi_blocked
))
3307 vmx
->vnmi_blocked_time
+=
3308 ktime_to_ns(ktime_sub(ktime_get(), vmx
->entry_time
));
3310 idt_vectoring_info
= vmx
->idt_vectoring_info
;
3311 idtv_info_valid
= idt_vectoring_info
& VECTORING_INFO_VALID_MASK
;
3312 vector
= idt_vectoring_info
& VECTORING_INFO_VECTOR_MASK
;
3313 type
= idt_vectoring_info
& VECTORING_INFO_TYPE_MASK
;
3314 if (vmx
->vcpu
.arch
.nmi_injected
) {
3317 * Clear bit "block by NMI" before VM entry if a NMI delivery
3320 if (idtv_info_valid
&& type
== INTR_TYPE_NMI_INTR
)
3321 vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO
,
3322 GUEST_INTR_STATE_NMI
);
3324 vmx
->vcpu
.arch
.nmi_injected
= false;
3326 kvm_clear_exception_queue(&vmx
->vcpu
);
3327 if (idtv_info_valid
&& (type
== INTR_TYPE_HARD_EXCEPTION
||
3328 type
== INTR_TYPE_SOFT_EXCEPTION
)) {
3329 if (idt_vectoring_info
& VECTORING_INFO_DELIVER_CODE_MASK
) {
3330 error
= vmcs_read32(IDT_VECTORING_ERROR_CODE
);
3331 kvm_queue_exception_e(&vmx
->vcpu
, vector
, error
);
3333 kvm_queue_exception(&vmx
->vcpu
, vector
);
3334 vmx
->idt_vectoring_info
= 0;
3336 kvm_clear_interrupt_queue(&vmx
->vcpu
);
3337 if (idtv_info_valid
&& type
== INTR_TYPE_EXT_INTR
) {
3338 kvm_queue_interrupt(&vmx
->vcpu
, vector
);
3339 vmx
->idt_vectoring_info
= 0;
3343 static void vmx_intr_assist(struct kvm_vcpu
*vcpu
)
3345 update_tpr_threshold(vcpu
);
3347 vmx_update_window_states(vcpu
);
3349 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
)
3350 vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO
,
3351 GUEST_INTR_STATE_STI
|
3352 GUEST_INTR_STATE_MOV_SS
);
3354 if (vcpu
->arch
.nmi_pending
&& !vcpu
->arch
.nmi_injected
) {
3355 if (vcpu
->arch
.interrupt
.pending
) {
3356 enable_nmi_window(vcpu
);
3357 } else if (vcpu
->arch
.nmi_window_open
) {
3358 vcpu
->arch
.nmi_pending
= false;
3359 vcpu
->arch
.nmi_injected
= true;
3361 enable_nmi_window(vcpu
);
3365 if (vcpu
->arch
.nmi_injected
) {
3366 vmx_inject_nmi(vcpu
);
3367 if (vcpu
->arch
.nmi_pending
)
3368 enable_nmi_window(vcpu
);
3369 else if (kvm_cpu_has_interrupt(vcpu
))
3370 enable_irq_window(vcpu
);
3373 if (!vcpu
->arch
.interrupt
.pending
&& kvm_cpu_has_interrupt(vcpu
)) {
3374 if (vcpu
->arch
.interrupt_window_open
)
3375 kvm_queue_interrupt(vcpu
, kvm_cpu_get_interrupt(vcpu
));
3377 enable_irq_window(vcpu
);
3379 if (vcpu
->arch
.interrupt
.pending
) {
3380 vmx_inject_irq(vcpu
, vcpu
->arch
.interrupt
.nr
);
3381 if (kvm_cpu_has_interrupt(vcpu
))
3382 enable_irq_window(vcpu
);
3387 * Failure to inject an interrupt should give us the information
3388 * in IDT_VECTORING_INFO_FIELD. However, if the failure occurs
3389 * when fetching the interrupt redirection bitmap in the real-mode
3390 * tss, this doesn't happen. So we do it ourselves.
3392 static void fixup_rmode_irq(struct vcpu_vmx
*vmx
)
3394 vmx
->rmode
.irq
.pending
= 0;
3395 if (kvm_rip_read(&vmx
->vcpu
) + 1 != vmx
->rmode
.irq
.rip
)
3397 kvm_rip_write(&vmx
->vcpu
, vmx
->rmode
.irq
.rip
);
3398 if (vmx
->idt_vectoring_info
& VECTORING_INFO_VALID_MASK
) {
3399 vmx
->idt_vectoring_info
&= ~VECTORING_INFO_TYPE_MASK
;
3400 vmx
->idt_vectoring_info
|= INTR_TYPE_EXT_INTR
;
3403 vmx
->idt_vectoring_info
=
3404 VECTORING_INFO_VALID_MASK
3405 | INTR_TYPE_EXT_INTR
3406 | vmx
->rmode
.irq
.vector
;
3409 #ifdef CONFIG_X86_64
3417 static void vmx_vcpu_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3419 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
3422 /* Record the guest's net vcpu time for enforced NMI injections. */
3423 if (unlikely(!cpu_has_virtual_nmis() && vmx
->soft_vnmi_blocked
))
3424 vmx
->entry_time
= ktime_get();
3426 /* Handle invalid guest state instead of entering VMX */
3427 if (vmx
->emulation_required
&& emulate_invalid_guest_state
) {
3428 handle_invalid_guest_state(vcpu
, kvm_run
);
3432 if (test_bit(VCPU_REGS_RSP
, (unsigned long *)&vcpu
->arch
.regs_dirty
))
3433 vmcs_writel(GUEST_RSP
, vcpu
->arch
.regs
[VCPU_REGS_RSP
]);
3434 if (test_bit(VCPU_REGS_RIP
, (unsigned long *)&vcpu
->arch
.regs_dirty
))
3435 vmcs_writel(GUEST_RIP
, vcpu
->arch
.regs
[VCPU_REGS_RIP
]);
3438 * Loading guest fpu may have cleared host cr0.ts
3440 vmcs_writel(HOST_CR0
, read_cr0());
3442 set_debugreg(vcpu
->arch
.dr6
, 6);
3445 /* Store host registers */
3446 "push %%"R
"dx; push %%"R
"bp;"
3448 "cmp %%"R
"sp, %c[host_rsp](%0) \n\t"
3450 "mov %%"R
"sp, %c[host_rsp](%0) \n\t"
3451 __ex(ASM_VMX_VMWRITE_RSP_RDX
) "\n\t"
3453 /* Check if vmlaunch of vmresume is needed */
3454 "cmpl $0, %c[launched](%0) \n\t"
3455 /* Load guest registers. Don't clobber flags. */
3456 "mov %c[cr2](%0), %%"R
"ax \n\t"
3457 "mov %%"R
"ax, %%cr2 \n\t"
3458 "mov %c[rax](%0), %%"R
"ax \n\t"
3459 "mov %c[rbx](%0), %%"R
"bx \n\t"
3460 "mov %c[rdx](%0), %%"R
"dx \n\t"
3461 "mov %c[rsi](%0), %%"R
"si \n\t"
3462 "mov %c[rdi](%0), %%"R
"di \n\t"
3463 "mov %c[rbp](%0), %%"R
"bp \n\t"
3464 #ifdef CONFIG_X86_64
3465 "mov %c[r8](%0), %%r8 \n\t"
3466 "mov %c[r9](%0), %%r9 \n\t"
3467 "mov %c[r10](%0), %%r10 \n\t"
3468 "mov %c[r11](%0), %%r11 \n\t"
3469 "mov %c[r12](%0), %%r12 \n\t"
3470 "mov %c[r13](%0), %%r13 \n\t"
3471 "mov %c[r14](%0), %%r14 \n\t"
3472 "mov %c[r15](%0), %%r15 \n\t"
3474 "mov %c[rcx](%0), %%"R
"cx \n\t" /* kills %0 (ecx) */
3476 /* Enter guest mode */
3477 "jne .Llaunched \n\t"
3478 __ex(ASM_VMX_VMLAUNCH
) "\n\t"
3479 "jmp .Lkvm_vmx_return \n\t"
3480 ".Llaunched: " __ex(ASM_VMX_VMRESUME
) "\n\t"
3481 ".Lkvm_vmx_return: "
3482 /* Save guest registers, load host registers, keep flags */
3483 "xchg %0, (%%"R
"sp) \n\t"
3484 "mov %%"R
"ax, %c[rax](%0) \n\t"
3485 "mov %%"R
"bx, %c[rbx](%0) \n\t"
3486 "push"Q
" (%%"R
"sp); pop"Q
" %c[rcx](%0) \n\t"
3487 "mov %%"R
"dx, %c[rdx](%0) \n\t"
3488 "mov %%"R
"si, %c[rsi](%0) \n\t"
3489 "mov %%"R
"di, %c[rdi](%0) \n\t"
3490 "mov %%"R
"bp, %c[rbp](%0) \n\t"
3491 #ifdef CONFIG_X86_64
3492 "mov %%r8, %c[r8](%0) \n\t"
3493 "mov %%r9, %c[r9](%0) \n\t"
3494 "mov %%r10, %c[r10](%0) \n\t"
3495 "mov %%r11, %c[r11](%0) \n\t"
3496 "mov %%r12, %c[r12](%0) \n\t"
3497 "mov %%r13, %c[r13](%0) \n\t"
3498 "mov %%r14, %c[r14](%0) \n\t"
3499 "mov %%r15, %c[r15](%0) \n\t"
3501 "mov %%cr2, %%"R
"ax \n\t"
3502 "mov %%"R
"ax, %c[cr2](%0) \n\t"
3504 "pop %%"R
"bp; pop %%"R
"bp; pop %%"R
"dx \n\t"
3505 "setbe %c[fail](%0) \n\t"
3506 : : "c"(vmx
), "d"((unsigned long)HOST_RSP
),
3507 [launched
]"i"(offsetof(struct vcpu_vmx
, launched
)),
3508 [fail
]"i"(offsetof(struct vcpu_vmx
, fail
)),
3509 [host_rsp
]"i"(offsetof(struct vcpu_vmx
, host_rsp
)),
3510 [rax
]"i"(offsetof(struct vcpu_vmx
, vcpu
.arch
.regs
[VCPU_REGS_RAX
])),
3511 [rbx
]"i"(offsetof(struct vcpu_vmx
, vcpu
.arch
.regs
[VCPU_REGS_RBX
])),
3512 [rcx
]"i"(offsetof(struct vcpu_vmx
, vcpu
.arch
.regs
[VCPU_REGS_RCX
])),
3513 [rdx
]"i"(offsetof(struct vcpu_vmx
, vcpu
.arch
.regs
[VCPU_REGS_RDX
])),
3514 [rsi
]"i"(offsetof(struct vcpu_vmx
, vcpu
.arch
.regs
[VCPU_REGS_RSI
])),
3515 [rdi
]"i"(offsetof(struct vcpu_vmx
, vcpu
.arch
.regs
[VCPU_REGS_RDI
])),
3516 [rbp
]"i"(offsetof(struct vcpu_vmx
, vcpu
.arch
.regs
[VCPU_REGS_RBP
])),
3517 #ifdef CONFIG_X86_64
3518 [r8
]"i"(offsetof(struct vcpu_vmx
, vcpu
.arch
.regs
[VCPU_REGS_R8
])),
3519 [r9
]"i"(offsetof(struct vcpu_vmx
, vcpu
.arch
.regs
[VCPU_REGS_R9
])),
3520 [r10
]"i"(offsetof(struct vcpu_vmx
, vcpu
.arch
.regs
[VCPU_REGS_R10
])),
3521 [r11
]"i"(offsetof(struct vcpu_vmx
, vcpu
.arch
.regs
[VCPU_REGS_R11
])),
3522 [r12
]"i"(offsetof(struct vcpu_vmx
, vcpu
.arch
.regs
[VCPU_REGS_R12
])),
3523 [r13
]"i"(offsetof(struct vcpu_vmx
, vcpu
.arch
.regs
[VCPU_REGS_R13
])),
3524 [r14
]"i"(offsetof(struct vcpu_vmx
, vcpu
.arch
.regs
[VCPU_REGS_R14
])),
3525 [r15
]"i"(offsetof(struct vcpu_vmx
, vcpu
.arch
.regs
[VCPU_REGS_R15
])),
3527 [cr2
]"i"(offsetof(struct vcpu_vmx
, vcpu
.arch
.cr2
))
3529 , R
"bx", R
"di", R
"si"
3530 #ifdef CONFIG_X86_64
3531 , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
3535 vcpu
->arch
.regs_avail
= ~((1 << VCPU_REGS_RIP
) | (1 << VCPU_REGS_RSP
));
3536 vcpu
->arch
.regs_dirty
= 0;
3538 get_debugreg(vcpu
->arch
.dr6
, 6);
3540 vmx
->idt_vectoring_info
= vmcs_read32(IDT_VECTORING_INFO_FIELD
);
3541 if (vmx
->rmode
.irq
.pending
)
3542 fixup_rmode_irq(vmx
);
3544 vmx_update_window_states(vcpu
);
3546 asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS
));
3549 intr_info
= vmcs_read32(VM_EXIT_INTR_INFO
);
3551 /* We need to handle NMIs before interrupts are enabled */
3552 if ((intr_info
& INTR_INFO_INTR_TYPE_MASK
) == INTR_TYPE_NMI_INTR
&&
3553 (intr_info
& INTR_INFO_VALID_MASK
)) {
3554 KVMTRACE_0D(NMI
, vcpu
, handler
);
3558 vmx_complete_interrupts(vmx
);
3564 static void vmx_free_vmcs(struct kvm_vcpu
*vcpu
)
3566 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
3570 free_vmcs(vmx
->vmcs
);
3575 static void vmx_free_vcpu(struct kvm_vcpu
*vcpu
)
3577 struct vcpu_vmx
*vmx
= to_vmx(vcpu
);
3579 spin_lock(&vmx_vpid_lock
);
3581 __clear_bit(vmx
->vpid
, vmx_vpid_bitmap
);
3582 spin_unlock(&vmx_vpid_lock
);
3583 vmx_free_vmcs(vcpu
);
3584 kfree(vmx
->host_msrs
);
3585 kfree(vmx
->guest_msrs
);
3586 kvm_vcpu_uninit(vcpu
);
3587 kmem_cache_free(kvm_vcpu_cache
, vmx
);
3590 static struct kvm_vcpu
*vmx_create_vcpu(struct kvm
*kvm
, unsigned int id
)
3593 struct vcpu_vmx
*vmx
= kmem_cache_zalloc(kvm_vcpu_cache
, GFP_KERNEL
);
3597 return ERR_PTR(-ENOMEM
);
3601 err
= kvm_vcpu_init(&vmx
->vcpu
, kvm
, id
);
3605 vmx
->guest_msrs
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
3606 if (!vmx
->guest_msrs
) {
3611 vmx
->host_msrs
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
3612 if (!vmx
->host_msrs
)
3613 goto free_guest_msrs
;
3615 vmx
->vmcs
= alloc_vmcs();
3619 vmcs_clear(vmx
->vmcs
);
3622 vmx_vcpu_load(&vmx
->vcpu
, cpu
);
3623 err
= vmx_vcpu_setup(vmx
);
3624 vmx_vcpu_put(&vmx
->vcpu
);
3628 if (vm_need_virtualize_apic_accesses(kvm
))
3629 if (alloc_apic_access_page(kvm
) != 0)
3633 if (alloc_identity_pagetable(kvm
) != 0)
3639 free_vmcs(vmx
->vmcs
);
3641 kfree(vmx
->host_msrs
);
3643 kfree(vmx
->guest_msrs
);
3645 kvm_vcpu_uninit(&vmx
->vcpu
);
3647 kmem_cache_free(kvm_vcpu_cache
, vmx
);
3648 return ERR_PTR(err
);
3651 static void __init
vmx_check_processor_compat(void *rtn
)
3653 struct vmcs_config vmcs_conf
;
3656 if (setup_vmcs_config(&vmcs_conf
) < 0)
3658 if (memcmp(&vmcs_config
, &vmcs_conf
, sizeof(struct vmcs_config
)) != 0) {
3659 printk(KERN_ERR
"kvm: CPU %d feature inconsistency!\n",
3660 smp_processor_id());
3665 static int get_ept_level(void)
3667 return VMX_EPT_DEFAULT_GAW
+ 1;
3670 static int vmx_get_mt_mask_shift(void)
3672 return VMX_EPT_MT_EPTE_SHIFT
;
3675 static struct kvm_x86_ops vmx_x86_ops
= {
3676 .cpu_has_kvm_support
= cpu_has_kvm_support
,
3677 .disabled_by_bios
= vmx_disabled_by_bios
,
3678 .hardware_setup
= hardware_setup
,
3679 .hardware_unsetup
= hardware_unsetup
,
3680 .check_processor_compatibility
= vmx_check_processor_compat
,
3681 .hardware_enable
= hardware_enable
,
3682 .hardware_disable
= hardware_disable
,
3683 .cpu_has_accelerated_tpr
= cpu_has_vmx_virtualize_apic_accesses
,
3685 .vcpu_create
= vmx_create_vcpu
,
3686 .vcpu_free
= vmx_free_vcpu
,
3687 .vcpu_reset
= vmx_vcpu_reset
,
3689 .prepare_guest_switch
= vmx_save_host_state
,
3690 .vcpu_load
= vmx_vcpu_load
,
3691 .vcpu_put
= vmx_vcpu_put
,
3693 .set_guest_debug
= set_guest_debug
,
3694 .get_msr
= vmx_get_msr
,
3695 .set_msr
= vmx_set_msr
,
3696 .get_segment_base
= vmx_get_segment_base
,
3697 .get_segment
= vmx_get_segment
,
3698 .set_segment
= vmx_set_segment
,
3699 .get_cpl
= vmx_get_cpl
,
3700 .get_cs_db_l_bits
= vmx_get_cs_db_l_bits
,
3701 .decache_cr4_guest_bits
= vmx_decache_cr4_guest_bits
,
3702 .set_cr0
= vmx_set_cr0
,
3703 .set_cr3
= vmx_set_cr3
,
3704 .set_cr4
= vmx_set_cr4
,
3705 .set_efer
= vmx_set_efer
,
3706 .get_idt
= vmx_get_idt
,
3707 .set_idt
= vmx_set_idt
,
3708 .get_gdt
= vmx_get_gdt
,
3709 .set_gdt
= vmx_set_gdt
,
3710 .cache_reg
= vmx_cache_reg
,
3711 .get_rflags
= vmx_get_rflags
,
3712 .set_rflags
= vmx_set_rflags
,
3714 .tlb_flush
= vmx_flush_tlb
,
3716 .run
= vmx_vcpu_run
,
3717 .handle_exit
= kvm_handle_exit
,
3718 .skip_emulated_instruction
= skip_emulated_instruction
,
3719 .patch_hypercall
= vmx_patch_hypercall
,
3720 .get_irq
= vmx_get_irq
,
3721 .set_irq
= vmx_inject_irq
,
3722 .queue_exception
= vmx_queue_exception
,
3723 .exception_injected
= vmx_exception_injected
,
3724 .inject_pending_irq
= vmx_intr_assist
,
3725 .inject_pending_vectors
= do_interrupt_requests
,
3727 .set_tss_addr
= vmx_set_tss_addr
,
3728 .get_tdp_level
= get_ept_level
,
3729 .get_mt_mask_shift
= vmx_get_mt_mask_shift
,
3732 static int __init
vmx_init(void)
3737 vmx_io_bitmap_a
= alloc_page(GFP_KERNEL
| __GFP_HIGHMEM
);
3738 if (!vmx_io_bitmap_a
)
3741 vmx_io_bitmap_b
= alloc_page(GFP_KERNEL
| __GFP_HIGHMEM
);
3742 if (!vmx_io_bitmap_b
) {
3747 vmx_msr_bitmap
= alloc_page(GFP_KERNEL
| __GFP_HIGHMEM
);
3748 if (!vmx_msr_bitmap
) {
3754 * Allow direct access to the PC debug port (it is often used for I/O
3755 * delays, but the vmexits simply slow things down).
3757 va
= kmap(vmx_io_bitmap_a
);
3758 memset(va
, 0xff, PAGE_SIZE
);
3759 clear_bit(0x80, va
);
3760 kunmap(vmx_io_bitmap_a
);
3762 va
= kmap(vmx_io_bitmap_b
);
3763 memset(va
, 0xff, PAGE_SIZE
);
3764 kunmap(vmx_io_bitmap_b
);
3766 va
= kmap(vmx_msr_bitmap
);
3767 memset(va
, 0xff, PAGE_SIZE
);
3768 kunmap(vmx_msr_bitmap
);
3770 set_bit(0, vmx_vpid_bitmap
); /* 0 is reserved for host */
3772 r
= kvm_init(&vmx_x86_ops
, sizeof(struct vcpu_vmx
), THIS_MODULE
);
3776 vmx_disable_intercept_for_msr(vmx_msr_bitmap
, MSR_FS_BASE
);
3777 vmx_disable_intercept_for_msr(vmx_msr_bitmap
, MSR_GS_BASE
);
3778 vmx_disable_intercept_for_msr(vmx_msr_bitmap
, MSR_IA32_SYSENTER_CS
);
3779 vmx_disable_intercept_for_msr(vmx_msr_bitmap
, MSR_IA32_SYSENTER_ESP
);
3780 vmx_disable_intercept_for_msr(vmx_msr_bitmap
, MSR_IA32_SYSENTER_EIP
);
3782 if (vm_need_ept()) {
3783 bypass_guest_pf
= 0;
3784 kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK
|
3785 VMX_EPT_WRITABLE_MASK
);
3786 kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull,
3787 VMX_EPT_EXECUTABLE_MASK
,
3788 VMX_EPT_DEFAULT_MT
<< VMX_EPT_MT_EPTE_SHIFT
);
3793 if (bypass_guest_pf
)
3794 kvm_mmu_set_nonpresent_ptes(~0xffeull
, 0ull);
3801 __free_page(vmx_msr_bitmap
);
3803 __free_page(vmx_io_bitmap_b
);
3805 __free_page(vmx_io_bitmap_a
);
3809 static void __exit
vmx_exit(void)
3811 __free_page(vmx_msr_bitmap
);
3812 __free_page(vmx_io_bitmap_b
);
3813 __free_page(vmx_io_bitmap_a
);
3818 module_init(vmx_init
)
3819 module_exit(vmx_exit
)