2 * Kernel-based Virtual Machine driver for Linux
4 * This header defines architecture specific interfaces, x86 version
6 * This work is licensed under the terms of the GNU GPL, version 2. See
7 * the COPYING file in the top-level directory.
11 #ifndef _ASM_X86_KVM_HOST_H
12 #define _ASM_X86_KVM_HOST_H
14 #include <linux/types.h>
16 #include <linux/mmu_notifier.h>
18 #include <linux/kvm.h>
19 #include <linux/kvm_para.h>
20 #include <linux/kvm_types.h>
22 #include <asm/pvclock-abi.h>
26 #define KVM_MAX_VCPUS 16
27 #define KVM_MEMORY_SLOTS 32
28 /* memory slots that does not exposed to userspace */
29 #define KVM_PRIVATE_MEM_SLOTS 4
31 #define KVM_PIO_PAGE_OFFSET 1
32 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
34 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
35 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
36 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \
37 0xFFFFFF0000000000ULL)
39 #define KVM_GUEST_CR0_MASK \
40 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
41 | X86_CR0_NW | X86_CR0_CD)
42 #define KVM_VM_CR0_ALWAYS_ON \
43 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
45 #define KVM_GUEST_CR4_MASK \
46 (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
47 #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
48 #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
50 #define INVALID_PAGE (~(hpa_t)0)
51 #define UNMAPPED_GVA (~(gpa_t)0)
53 /* shadow tables are PAE even on non-PAE hosts */
54 #define KVM_HPAGE_SHIFT 21
55 #define KVM_HPAGE_SIZE (1UL << KVM_HPAGE_SHIFT)
56 #define KVM_HPAGE_MASK (~(KVM_HPAGE_SIZE - 1))
58 #define KVM_PAGES_PER_HPAGE (KVM_HPAGE_SIZE / PAGE_SIZE)
76 #define SELECTOR_TI_MASK (1 << 2)
77 #define SELECTOR_RPL_MASK 0x03
81 #define KVM_ALIAS_SLOTS 4
83 #define KVM_PERMILLE_MMU_PAGES 20
84 #define KVM_MIN_ALLOC_MMU_PAGES 64
85 #define KVM_MMU_HASH_SHIFT 10
86 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
87 #define KVM_MIN_FREE_MMU_PAGES 5
88 #define KVM_REFILL_PAGES 25
89 #define KVM_MAX_CPUID_ENTRIES 40
90 #define KVM_NR_FIXED_MTRR_REGION 88
91 #define KVM_NR_VAR_MTRR 8
93 extern spinlock_t kvm_lock;
94 extern struct list_head vm_list;
133 #include <asm/kvm_x86_emulate.h>
135 #define KVM_NR_MEM_OBJS 40
137 struct kvm_guest_debug {
144 * We don't want allocation failures within the mmu code, so we preallocate
145 * enough memory for a single page fault in a cache.
147 struct kvm_mmu_memory_cache {
149 void *objects[KVM_NR_MEM_OBJS];
152 #define NR_PTE_CHAIN_ENTRIES 5
154 struct kvm_pte_chain {
155 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
156 struct hlist_node link;
160 * kvm_mmu_page_role, below, is defined as:
162 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
163 * bits 4:7 - page table level for this shadow (1-4)
164 * bits 8:9 - page table quadrant for 2-level guests
165 * bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
166 * bits 17:19 - common access permissions for all ptes in this shadow page
168 union kvm_mmu_page_role {
174 unsigned pad_for_nice_hex_output:6;
175 unsigned metaphysical:1;
181 struct kvm_mmu_page {
182 struct list_head link;
183 struct hlist_node hash_link;
186 * The following two entries are used to key the shadow page in the
190 union kvm_mmu_page_role role;
193 /* hold the gfn of each spte inside spt */
195 unsigned long slot_bitmap; /* One bit set per slot which has memory
196 * in this shadow page.
198 int multimapped; /* More than one parent_pte? */
199 int root_count; /* Currently serving as active root */
201 bool unsync_children;
203 u64 *parent_pte; /* !multimapped */
204 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
206 DECLARE_BITMAP(unsync_child_bitmap, 512);
209 struct kvm_pv_mmu_op_buffer {
213 char buf[512] __aligned(sizeof(long));
217 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
218 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
222 void (*new_cr3)(struct kvm_vcpu *vcpu);
223 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
224 void (*free)(struct kvm_vcpu *vcpu);
225 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
226 void (*prefetch_page)(struct kvm_vcpu *vcpu,
227 struct kvm_mmu_page *page);
228 int (*sync_page)(struct kvm_vcpu *vcpu,
229 struct kvm_mmu_page *sp);
230 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
233 int shadow_root_level;
238 struct kvm_vcpu_arch {
240 int interrupt_window_open;
241 unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
242 DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
244 * rip and regs accesses must go through
245 * kvm_{register,rip}_{read,write} functions.
247 unsigned long regs[NR_VCPU_REGS];
256 u64 pdptrs[4]; /* pae */
259 struct kvm_lapic *apic; /* kernel irqchip context */
262 u64 ia32_misc_enable_msr;
263 bool tpr_access_reporting;
266 /* only needed in kvm_pv_mmu_op() path, but it's hot so
267 * put it here to avoid allocation */
268 struct kvm_pv_mmu_op_buffer mmu_op_buffer;
270 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
271 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
272 struct kvm_mmu_memory_cache mmu_page_cache;
273 struct kvm_mmu_memory_cache mmu_page_header_cache;
275 gfn_t last_pt_write_gfn;
276 int last_pt_write_count;
277 u64 *last_pte_updated;
281 gfn_t gfn; /* presumed gfn during guest pte update */
282 pfn_t pfn; /* pfn corresponding to that gfn */
284 unsigned long mmu_seq;
287 struct i387_fxsave_struct host_fx_image;
288 struct i387_fxsave_struct guest_fx_image;
290 gva_t mmio_fault_cr2;
291 struct kvm_pio_request pio;
294 struct kvm_queued_exception {
301 struct kvm_queued_interrupt {
309 struct kvm_save_segment {
314 } tr, es, ds, fs, gs;
316 int halt_request; /* real mode on Intel only */
319 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
320 /* emulate context */
322 struct x86_emulate_ctxt emulate_ctxt;
325 struct pvclock_vcpu_time_info hv_clock;
326 unsigned int hv_clock_tsc_khz;
327 unsigned int time_offset;
328 struct page *time_page;
332 bool nmi_window_open;
334 struct mtrr_state_type mtrr_state;
338 struct kvm_mem_alias {
340 unsigned long npages;
346 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
348 unsigned int n_free_mmu_pages;
349 unsigned int n_requested_mmu_pages;
350 unsigned int n_alloc_mmu_pages;
351 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
353 * Hash table of struct kvm_mmu_page.
355 struct list_head active_mmu_pages;
356 struct list_head assigned_dev_head;
357 struct dmar_domain *intel_iommu_domain;
358 struct kvm_pic *vpic;
359 struct kvm_ioapic *vioapic;
360 struct kvm_pit *vpit;
361 struct hlist_head irq_ack_notifier_list;
363 int round_robin_prev_vcpu;
364 unsigned int tss_addr;
365 struct page *apic_access_page;
369 struct page *ept_identity_pagetable;
370 bool ept_identity_pagetable_done;
372 unsigned long irq_sources_bitmap;
373 unsigned long irq_states[KVM_IOAPIC_NUM_PINS];
377 u32 mmu_shadow_zapped;
385 u32 remote_tlb_flush;
389 struct kvm_vcpu_stat {
399 u32 irq_window_exits;
400 u32 nmi_window_exits;
403 u32 request_irq_exits;
404 u32 request_nmi_exits;
406 u32 host_state_reload;
410 u32 insn_emulation_fail;
416 struct descriptor_table {
419 } __attribute__((packed));
422 int (*cpu_has_kvm_support)(void); /* __init */
423 int (*disabled_by_bios)(void); /* __init */
424 void (*hardware_enable)(void *dummy); /* __init */
425 void (*hardware_disable)(void *dummy);
426 void (*check_processor_compatibility)(void *rtn);
427 int (*hardware_setup)(void); /* __init */
428 void (*hardware_unsetup)(void); /* __exit */
429 bool (*cpu_has_accelerated_tpr)(void);
431 /* Create, but do not attach this VCPU */
432 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
433 void (*vcpu_free)(struct kvm_vcpu *vcpu);
434 int (*vcpu_reset)(struct kvm_vcpu *vcpu);
436 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
437 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
438 void (*vcpu_put)(struct kvm_vcpu *vcpu);
440 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
441 struct kvm_debug_guest *dbg);
442 void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
443 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
444 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
445 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
446 void (*get_segment)(struct kvm_vcpu *vcpu,
447 struct kvm_segment *var, int seg);
448 int (*get_cpl)(struct kvm_vcpu *vcpu);
449 void (*set_segment)(struct kvm_vcpu *vcpu,
450 struct kvm_segment *var, int seg);
451 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
452 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
453 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
454 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
455 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
456 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
457 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
458 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
459 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
460 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
461 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
462 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
464 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
465 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
466 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
468 void (*tlb_flush)(struct kvm_vcpu *vcpu);
470 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
471 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
472 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
473 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
474 unsigned char *hypercall_addr);
475 int (*get_irq)(struct kvm_vcpu *vcpu);
476 void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
477 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
478 bool has_error_code, u32 error_code);
479 bool (*exception_injected)(struct kvm_vcpu *vcpu);
480 void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
481 void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
482 struct kvm_run *run);
484 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
485 int (*get_tdp_level)(void);
488 extern struct kvm_x86_ops *kvm_x86_ops;
490 int kvm_mmu_module_init(void);
491 void kvm_mmu_module_exit(void);
493 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
494 int kvm_mmu_create(struct kvm_vcpu *vcpu);
495 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
496 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
497 void kvm_mmu_set_base_ptes(u64 base_pte);
498 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
499 u64 dirty_mask, u64 nx_mask, u64 x_mask);
501 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
502 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
503 void kvm_mmu_zap_all(struct kvm *kvm);
504 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
505 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
507 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
509 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
510 const void *val, int bytes);
511 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
512 gpa_t addr, unsigned long *ret);
514 extern bool tdp_enabled;
516 enum emulation_result {
517 EMULATE_DONE, /* no further processing */
518 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
519 EMULATE_FAIL, /* can't emulate this instruction */
522 #define EMULTYPE_NO_DECODE (1 << 0)
523 #define EMULTYPE_TRAP_UD (1 << 1)
524 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
525 unsigned long cr2, u16 error_code, int emulation_type);
526 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
527 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
528 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
529 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
530 unsigned long *rflags);
532 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
533 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
534 unsigned long *rflags);
535 void kvm_enable_efer_bits(u64);
536 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
537 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
539 struct x86_emulate_ctxt;
541 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
542 int size, unsigned port);
543 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
544 int size, unsigned long count, int down,
545 gva_t address, int rep, unsigned port);
546 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
547 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
548 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
549 int emulate_clts(struct kvm_vcpu *vcpu);
550 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
551 unsigned long *dest);
552 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
553 unsigned long value);
555 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
556 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
557 int type_bits, int seg);
559 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
561 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
562 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
563 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
564 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
565 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
566 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
567 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
569 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
570 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
572 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
573 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
574 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
577 void kvm_pic_set_irq(void *opaque, int irq, int level);
579 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
581 void fx_init(struct kvm_vcpu *vcpu);
583 int emulator_read_std(unsigned long addr,
586 struct kvm_vcpu *vcpu);
587 int emulator_write_emulated(unsigned long addr,
590 struct kvm_vcpu *vcpu);
592 unsigned long segment_base(u16 selector);
594 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
595 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
596 const u8 *new, int bytes);
597 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
598 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
599 int kvm_mmu_load(struct kvm_vcpu *vcpu);
600 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
601 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
603 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
605 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
607 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
608 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
610 void kvm_enable_tdp(void);
611 void kvm_disable_tdp(void);
613 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
614 int complete_pio(struct kvm_vcpu *vcpu);
616 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
618 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
620 return (struct kvm_mmu_page *)page_private(page);
623 static inline u16 kvm_read_fs(void)
626 asm("mov %%fs, %0" : "=g"(seg));
630 static inline u16 kvm_read_gs(void)
633 asm("mov %%gs, %0" : "=g"(seg));
637 static inline u16 kvm_read_ldt(void)
640 asm("sldt %0" : "=g"(ldt));
644 static inline void kvm_load_fs(u16 sel)
646 asm("mov %0, %%fs" : : "rm"(sel));
649 static inline void kvm_load_gs(u16 sel)
651 asm("mov %0, %%gs" : : "rm"(sel));
654 static inline void kvm_load_ldt(u16 sel)
656 asm("lldt %0" : : "rm"(sel));
659 static inline void kvm_get_idt(struct descriptor_table *table)
661 asm("sidt %0" : "=m"(*table));
664 static inline void kvm_get_gdt(struct descriptor_table *table)
666 asm("sgdt %0" : "=m"(*table));
669 static inline unsigned long kvm_read_tr_base(void)
672 asm("str %0" : "=g"(tr));
673 return segment_base(tr);
677 static inline unsigned long read_msr(unsigned long msr)
686 static inline void kvm_fx_save(struct i387_fxsave_struct *image)
688 asm("fxsave (%0)":: "r" (image));
691 static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
693 asm("fxrstor (%0)":: "r" (image));
696 static inline void kvm_fx_finit(void)
701 static inline u32 get_rdx_init_val(void)
703 return 0x600; /* P6 family */
706 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
708 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
711 #define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
712 #define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
713 #define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
714 #define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
715 #define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
716 #define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
717 #define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
718 #define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
719 #define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
720 #define ASM_VMX_INVEPT ".byte 0x66, 0x0f, 0x38, 0x80, 0x08"
721 #define ASM_VMX_INVVPID ".byte 0x66, 0x0f, 0x38, 0x81, 0x08"
723 #define MSR_IA32_TIME_STAMP_COUNTER 0x010
725 #define TSS_IOPB_BASE_OFFSET 0x66
726 #define TSS_BASE_SIZE 0x68
727 #define TSS_IOPB_SIZE (65536 / 8)
728 #define TSS_REDIRECTION_SIZE (256 / 8)
729 #define RMODE_TSS_SIZE \
730 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
733 TASK_SWITCH_CALL = 0,
734 TASK_SWITCH_IRET = 1,
736 TASK_SWITCH_GATE = 3,
740 * Hardware virtualization extension instructions may fault if a
741 * reboot turns off virtualization while processes are running.
742 * Trap the fault and ignore the instruction if that happens.
744 asmlinkage void kvm_handle_fault_on_reboot(void);
746 #define __kvm_handle_fault_on_reboot(insn) \
747 "666: " insn "\n\t" \
748 ".pushsection .fixup, \"ax\" \n" \
750 __ASM_SIZE(push) " $666b \n\t" \
751 "jmp kvm_handle_fault_on_reboot \n\t" \
753 ".pushsection __ex_table, \"a\" \n\t" \
754 _ASM_PTR " 666b, 667b \n\t" \
757 #define KVM_ARCH_WANT_MMU_NOTIFIER
758 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
759 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
761 #endif /* _ASM_X86_KVM_HOST_H */