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>
25 #include <asm/msr-index.h>
27 #define KVM_MAX_VCPUS 16
28 #define KVM_MEMORY_SLOTS 32
29 /* memory slots that does not exposed to userspace */
30 #define KVM_PRIVATE_MEM_SLOTS 4
32 #define KVM_PIO_PAGE_OFFSET 1
33 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
35 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
36 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
37 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \
38 0xFFFFFF0000000000ULL)
40 #define KVM_GUEST_CR0_MASK \
41 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
42 | X86_CR0_NW | X86_CR0_CD)
43 #define KVM_VM_CR0_ALWAYS_ON \
44 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
46 #define KVM_GUEST_CR4_MASK \
47 (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
48 #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
49 #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
51 #define INVALID_PAGE (~(hpa_t)0)
52 #define UNMAPPED_GVA (~(gpa_t)0)
54 /* shadow tables are PAE even on non-PAE hosts */
55 #define KVM_HPAGE_SHIFT 21
56 #define KVM_HPAGE_SIZE (1UL << KVM_HPAGE_SHIFT)
57 #define KVM_HPAGE_MASK (~(KVM_HPAGE_SIZE - 1))
59 #define KVM_PAGES_PER_HPAGE (KVM_HPAGE_SIZE / PAGE_SIZE)
77 #define SELECTOR_TI_MASK (1 << 2)
78 #define SELECTOR_RPL_MASK 0x03
82 #define KVM_ALIAS_SLOTS 4
84 #define KVM_PERMILLE_MMU_PAGES 20
85 #define KVM_MIN_ALLOC_MMU_PAGES 64
86 #define KVM_MMU_HASH_SHIFT 10
87 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
88 #define KVM_MIN_FREE_MMU_PAGES 5
89 #define KVM_REFILL_PAGES 25
90 #define KVM_MAX_CPUID_ENTRIES 40
91 #define KVM_NR_FIXED_MTRR_REGION 88
92 #define KVM_NR_VAR_MTRR 8
94 extern spinlock_t kvm_lock;
95 extern struct list_head vm_list;
134 #include <asm/kvm_x86_emulate.h>
136 #define KVM_NR_MEM_OBJS 40
138 struct kvm_guest_debug {
145 * We don't want allocation failures within the mmu code, so we preallocate
146 * enough memory for a single page fault in a cache.
148 struct kvm_mmu_memory_cache {
150 void *objects[KVM_NR_MEM_OBJS];
153 #define NR_PTE_CHAIN_ENTRIES 5
155 struct kvm_pte_chain {
156 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
157 struct hlist_node link;
161 * kvm_mmu_page_role, below, is defined as:
163 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
164 * bits 4:7 - page table level for this shadow (1-4)
165 * bits 8:9 - page table quadrant for 2-level guests
166 * bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
167 * bits 17:19 - common access permissions for all ptes in this shadow page
169 union kvm_mmu_page_role {
175 unsigned pad_for_nice_hex_output:6;
176 unsigned metaphysical:1;
182 struct kvm_mmu_page {
183 struct list_head link;
184 struct hlist_node hash_link;
186 struct list_head oos_link;
189 * The following two entries are used to key the shadow page in the
193 union kvm_mmu_page_role role;
196 /* hold the gfn of each spte inside spt */
199 * One bit set per slot which has memory
200 * in this shadow page.
202 DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS);
203 int multimapped; /* More than one parent_pte? */
204 int root_count; /* Currently serving as active root */
207 unsigned int unsync_children;
209 u64 *parent_pte; /* !multimapped */
210 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
212 DECLARE_BITMAP(unsync_child_bitmap, 512);
215 struct kvm_pv_mmu_op_buffer {
219 char buf[512] __aligned(sizeof(long));
223 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
224 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
228 void (*new_cr3)(struct kvm_vcpu *vcpu);
229 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
230 void (*free)(struct kvm_vcpu *vcpu);
231 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
232 void (*prefetch_page)(struct kvm_vcpu *vcpu,
233 struct kvm_mmu_page *page);
234 int (*sync_page)(struct kvm_vcpu *vcpu,
235 struct kvm_mmu_page *sp);
236 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
239 int shadow_root_level;
244 struct kvm_vcpu_arch {
246 int interrupt_window_open;
247 unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
248 DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
250 * rip and regs accesses must go through
251 * kvm_{register,rip}_{read,write} functions.
253 unsigned long regs[NR_VCPU_REGS];
263 u64 pdptrs[4]; /* pae */
266 struct kvm_lapic *apic; /* kernel irqchip context */
269 u64 ia32_misc_enable_msr;
270 bool tpr_access_reporting;
273 /* only needed in kvm_pv_mmu_op() path, but it's hot so
274 * put it here to avoid allocation */
275 struct kvm_pv_mmu_op_buffer mmu_op_buffer;
277 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
278 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
279 struct kvm_mmu_memory_cache mmu_page_cache;
280 struct kvm_mmu_memory_cache mmu_page_header_cache;
282 gfn_t last_pt_write_gfn;
283 int last_pt_write_count;
284 u64 *last_pte_updated;
288 gfn_t gfn; /* presumed gfn during guest pte update */
289 pfn_t pfn; /* pfn corresponding to that gfn */
291 unsigned long mmu_seq;
294 struct i387_fxsave_struct host_fx_image;
295 struct i387_fxsave_struct guest_fx_image;
297 gva_t mmio_fault_cr2;
298 struct kvm_pio_request pio;
301 struct kvm_queued_exception {
308 struct kvm_queued_interrupt {
316 struct kvm_save_segment {
321 } tr, es, ds, fs, gs;
323 int halt_request; /* real mode on Intel only */
326 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
327 /* emulate context */
329 struct x86_emulate_ctxt emulate_ctxt;
332 struct pvclock_vcpu_time_info hv_clock;
333 unsigned int hv_clock_tsc_khz;
334 unsigned int time_offset;
335 struct page *time_page;
339 bool nmi_window_open;
341 struct mtrr_state_type mtrr_state;
345 struct kvm_mem_alias {
347 unsigned long npages;
353 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
355 unsigned int n_free_mmu_pages;
356 unsigned int n_requested_mmu_pages;
357 unsigned int n_alloc_mmu_pages;
358 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
360 * Hash table of struct kvm_mmu_page.
362 struct list_head active_mmu_pages;
363 struct list_head assigned_dev_head;
364 struct list_head oos_global_pages;
365 struct iommu_domain *iommu_domain;
366 struct kvm_pic *vpic;
367 struct kvm_ioapic *vioapic;
368 struct kvm_pit *vpit;
369 struct hlist_head irq_ack_notifier_list;
370 int vapics_in_nmi_mode;
372 int round_robin_prev_vcpu;
373 unsigned int tss_addr;
374 struct page *apic_access_page;
378 struct page *ept_identity_pagetable;
379 bool ept_identity_pagetable_done;
381 unsigned long irq_sources_bitmap;
382 unsigned long irq_states[KVM_IOAPIC_NUM_PINS];
386 u32 mmu_shadow_zapped;
394 u32 mmu_unsync_global;
395 u32 remote_tlb_flush;
399 struct kvm_vcpu_stat {
409 u32 irq_window_exits;
410 u32 nmi_window_exits;
413 u32 request_irq_exits;
414 u32 request_nmi_exits;
416 u32 host_state_reload;
420 u32 insn_emulation_fail;
426 struct descriptor_table {
429 } __attribute__((packed));
432 int (*cpu_has_kvm_support)(void); /* __init */
433 int (*disabled_by_bios)(void); /* __init */
434 void (*hardware_enable)(void *dummy); /* __init */
435 void (*hardware_disable)(void *dummy);
436 void (*check_processor_compatibility)(void *rtn);
437 int (*hardware_setup)(void); /* __init */
438 void (*hardware_unsetup)(void); /* __exit */
439 bool (*cpu_has_accelerated_tpr)(void);
441 /* Create, but do not attach this VCPU */
442 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
443 void (*vcpu_free)(struct kvm_vcpu *vcpu);
444 int (*vcpu_reset)(struct kvm_vcpu *vcpu);
446 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
447 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
448 void (*vcpu_put)(struct kvm_vcpu *vcpu);
450 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
451 struct kvm_debug_guest *dbg);
452 void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
453 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
454 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
455 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
456 void (*get_segment)(struct kvm_vcpu *vcpu,
457 struct kvm_segment *var, int seg);
458 int (*get_cpl)(struct kvm_vcpu *vcpu);
459 void (*set_segment)(struct kvm_vcpu *vcpu,
460 struct kvm_segment *var, int seg);
461 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
462 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
463 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
464 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
465 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
466 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
467 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
468 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
469 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
470 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
471 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
472 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
474 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
475 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
476 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
478 void (*tlb_flush)(struct kvm_vcpu *vcpu);
480 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
481 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
482 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
483 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
484 unsigned char *hypercall_addr);
485 int (*get_irq)(struct kvm_vcpu *vcpu);
486 void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
487 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
488 bool has_error_code, u32 error_code);
489 bool (*exception_injected)(struct kvm_vcpu *vcpu);
490 void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
491 void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
492 struct kvm_run *run);
494 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
495 int (*get_tdp_level)(void);
496 int (*get_mt_mask_shift)(void);
499 extern struct kvm_x86_ops *kvm_x86_ops;
501 int kvm_mmu_module_init(void);
502 void kvm_mmu_module_exit(void);
504 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
505 int kvm_mmu_create(struct kvm_vcpu *vcpu);
506 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
507 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
508 void kvm_mmu_set_base_ptes(u64 base_pte);
509 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
510 u64 dirty_mask, u64 nx_mask, u64 x_mask, u64 mt_mask);
512 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
513 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
514 void kvm_mmu_zap_all(struct kvm *kvm);
515 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
516 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
518 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
520 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
521 const void *val, int bytes);
522 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
523 gpa_t addr, unsigned long *ret);
525 extern bool tdp_enabled;
527 enum emulation_result {
528 EMULATE_DONE, /* no further processing */
529 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
530 EMULATE_FAIL, /* can't emulate this instruction */
533 #define EMULTYPE_NO_DECODE (1 << 0)
534 #define EMULTYPE_TRAP_UD (1 << 1)
535 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
536 unsigned long cr2, u16 error_code, int emulation_type);
537 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
538 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
539 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
540 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
541 unsigned long *rflags);
543 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
544 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
545 unsigned long *rflags);
546 void kvm_enable_efer_bits(u64);
547 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
548 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
550 struct x86_emulate_ctxt;
552 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
553 int size, unsigned port);
554 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
555 int size, unsigned long count, int down,
556 gva_t address, int rep, unsigned port);
557 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
558 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
559 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
560 int emulate_clts(struct kvm_vcpu *vcpu);
561 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
562 unsigned long *dest);
563 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
564 unsigned long value);
566 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
567 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
568 int type_bits, int seg);
570 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
572 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
573 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
574 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
575 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
576 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
577 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
578 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
580 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
581 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
583 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
584 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
585 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
588 void kvm_pic_set_irq(void *opaque, int irq, int level);
590 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
592 void fx_init(struct kvm_vcpu *vcpu);
594 int emulator_read_std(unsigned long addr,
597 struct kvm_vcpu *vcpu);
598 int emulator_write_emulated(unsigned long addr,
601 struct kvm_vcpu *vcpu);
603 unsigned long segment_base(u16 selector);
605 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
606 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
607 const u8 *new, int bytes,
608 bool guest_initiated);
609 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
610 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
611 int kvm_mmu_load(struct kvm_vcpu *vcpu);
612 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
613 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
614 void kvm_mmu_sync_global(struct kvm_vcpu *vcpu);
616 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
618 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
620 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
621 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
623 void kvm_enable_tdp(void);
624 void kvm_disable_tdp(void);
626 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
627 int complete_pio(struct kvm_vcpu *vcpu);
629 struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn);
631 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
633 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
635 return (struct kvm_mmu_page *)page_private(page);
638 static inline u16 kvm_read_fs(void)
641 asm("mov %%fs, %0" : "=g"(seg));
645 static inline u16 kvm_read_gs(void)
648 asm("mov %%gs, %0" : "=g"(seg));
652 static inline u16 kvm_read_ldt(void)
655 asm("sldt %0" : "=g"(ldt));
659 static inline void kvm_load_fs(u16 sel)
661 asm("mov %0, %%fs" : : "rm"(sel));
664 static inline void kvm_load_gs(u16 sel)
666 asm("mov %0, %%gs" : : "rm"(sel));
669 static inline void kvm_load_ldt(u16 sel)
671 asm("lldt %0" : : "rm"(sel));
674 static inline void kvm_get_idt(struct descriptor_table *table)
676 asm("sidt %0" : "=m"(*table));
679 static inline void kvm_get_gdt(struct descriptor_table *table)
681 asm("sgdt %0" : "=m"(*table));
684 static inline unsigned long kvm_read_tr_base(void)
687 asm("str %0" : "=g"(tr));
688 return segment_base(tr);
692 static inline unsigned long read_msr(unsigned long msr)
701 static inline void kvm_fx_save(struct i387_fxsave_struct *image)
703 asm("fxsave (%0)":: "r" (image));
706 static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
708 asm("fxrstor (%0)":: "r" (image));
711 static inline void kvm_fx_finit(void)
716 static inline u32 get_rdx_init_val(void)
718 return 0x600; /* P6 family */
721 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
723 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
726 #define MSR_IA32_TIME_STAMP_COUNTER 0x010
728 #define TSS_IOPB_BASE_OFFSET 0x66
729 #define TSS_BASE_SIZE 0x68
730 #define TSS_IOPB_SIZE (65536 / 8)
731 #define TSS_REDIRECTION_SIZE (256 / 8)
732 #define RMODE_TSS_SIZE \
733 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
736 TASK_SWITCH_CALL = 0,
737 TASK_SWITCH_IRET = 1,
739 TASK_SWITCH_GATE = 3,
742 #define HF_GIF_MASK (1 << 0)
745 * Hardware virtualization extension instructions may fault if a
746 * reboot turns off virtualization while processes are running.
747 * Trap the fault and ignore the instruction if that happens.
749 asmlinkage void kvm_handle_fault_on_reboot(void);
751 #define __kvm_handle_fault_on_reboot(insn) \
752 "666: " insn "\n\t" \
753 ".pushsection .fixup, \"ax\" \n" \
755 __ASM_SIZE(push) " $666b \n\t" \
756 "jmp kvm_handle_fault_on_reboot \n\t" \
758 ".pushsection __ex_table, \"a\" \n\t" \
759 _ASM_PTR " 666b, 667b \n\t" \
762 #define KVM_ARCH_WANT_MMU_NOTIFIER
763 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
764 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
766 #endif /* _ASM_X86_KVM_HOST_H */