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 */
196 * One bit set per slot which has memory
197 * in this shadow page.
199 DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS);
200 int multimapped; /* More than one parent_pte? */
201 int root_count; /* Currently serving as active root */
203 bool unsync_children;
205 u64 *parent_pte; /* !multimapped */
206 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
208 DECLARE_BITMAP(unsync_child_bitmap, 512);
211 struct kvm_pv_mmu_op_buffer {
215 char buf[512] __aligned(sizeof(long));
219 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
220 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
224 void (*new_cr3)(struct kvm_vcpu *vcpu);
225 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
226 void (*free)(struct kvm_vcpu *vcpu);
227 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
228 void (*prefetch_page)(struct kvm_vcpu *vcpu,
229 struct kvm_mmu_page *page);
230 int (*sync_page)(struct kvm_vcpu *vcpu,
231 struct kvm_mmu_page *sp);
232 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
235 int shadow_root_level;
240 struct kvm_vcpu_arch {
242 int interrupt_window_open;
243 unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
244 DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
246 * rip and regs accesses must go through
247 * kvm_{register,rip}_{read,write} functions.
249 unsigned long regs[NR_VCPU_REGS];
258 u64 pdptrs[4]; /* pae */
261 struct kvm_lapic *apic; /* kernel irqchip context */
264 u64 ia32_misc_enable_msr;
265 bool tpr_access_reporting;
268 /* only needed in kvm_pv_mmu_op() path, but it's hot so
269 * put it here to avoid allocation */
270 struct kvm_pv_mmu_op_buffer mmu_op_buffer;
272 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
273 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
274 struct kvm_mmu_memory_cache mmu_page_cache;
275 struct kvm_mmu_memory_cache mmu_page_header_cache;
277 gfn_t last_pt_write_gfn;
278 int last_pt_write_count;
279 u64 *last_pte_updated;
283 gfn_t gfn; /* presumed gfn during guest pte update */
284 pfn_t pfn; /* pfn corresponding to that gfn */
286 unsigned long mmu_seq;
289 struct i387_fxsave_struct host_fx_image;
290 struct i387_fxsave_struct guest_fx_image;
292 gva_t mmio_fault_cr2;
293 struct kvm_pio_request pio;
296 struct kvm_queued_exception {
303 struct kvm_queued_interrupt {
311 struct kvm_save_segment {
316 } tr, es, ds, fs, gs;
318 int halt_request; /* real mode on Intel only */
321 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
322 /* emulate context */
324 struct x86_emulate_ctxt emulate_ctxt;
327 struct pvclock_vcpu_time_info hv_clock;
328 unsigned int hv_clock_tsc_khz;
329 unsigned int time_offset;
330 struct page *time_page;
334 bool nmi_window_open;
336 struct mtrr_state_type mtrr_state;
340 struct kvm_mem_alias {
342 unsigned long npages;
348 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
350 unsigned int n_free_mmu_pages;
351 unsigned int n_requested_mmu_pages;
352 unsigned int n_alloc_mmu_pages;
353 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
355 * Hash table of struct kvm_mmu_page.
357 struct list_head active_mmu_pages;
358 struct list_head assigned_dev_head;
359 struct dmar_domain *intel_iommu_domain;
360 struct kvm_pic *vpic;
361 struct kvm_ioapic *vioapic;
362 struct kvm_pit *vpit;
363 struct hlist_head irq_ack_notifier_list;
364 int vapics_in_nmi_mode;
366 int round_robin_prev_vcpu;
367 unsigned int tss_addr;
368 struct page *apic_access_page;
372 struct page *ept_identity_pagetable;
373 bool ept_identity_pagetable_done;
375 unsigned long irq_sources_bitmap;
376 unsigned long irq_states[KVM_IOAPIC_NUM_PINS];
380 u32 mmu_shadow_zapped;
388 u32 remote_tlb_flush;
392 struct kvm_vcpu_stat {
402 u32 irq_window_exits;
403 u32 nmi_window_exits;
406 u32 request_irq_exits;
407 u32 request_nmi_exits;
409 u32 host_state_reload;
413 u32 insn_emulation_fail;
419 struct descriptor_table {
422 } __attribute__((packed));
425 int (*cpu_has_kvm_support)(void); /* __init */
426 int (*disabled_by_bios)(void); /* __init */
427 void (*hardware_enable)(void *dummy); /* __init */
428 void (*hardware_disable)(void *dummy);
429 void (*check_processor_compatibility)(void *rtn);
430 int (*hardware_setup)(void); /* __init */
431 void (*hardware_unsetup)(void); /* __exit */
432 bool (*cpu_has_accelerated_tpr)(void);
434 /* Create, but do not attach this VCPU */
435 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
436 void (*vcpu_free)(struct kvm_vcpu *vcpu);
437 int (*vcpu_reset)(struct kvm_vcpu *vcpu);
439 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
440 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
441 void (*vcpu_put)(struct kvm_vcpu *vcpu);
443 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
444 struct kvm_debug_guest *dbg);
445 void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
446 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
447 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
448 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
449 void (*get_segment)(struct kvm_vcpu *vcpu,
450 struct kvm_segment *var, int seg);
451 int (*get_cpl)(struct kvm_vcpu *vcpu);
452 void (*set_segment)(struct kvm_vcpu *vcpu,
453 struct kvm_segment *var, int seg);
454 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
455 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
456 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
457 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
458 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
459 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
460 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
461 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
462 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
463 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
464 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
465 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
467 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
468 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
469 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
471 void (*tlb_flush)(struct kvm_vcpu *vcpu);
473 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
474 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
475 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
476 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
477 unsigned char *hypercall_addr);
478 int (*get_irq)(struct kvm_vcpu *vcpu);
479 void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
480 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
481 bool has_error_code, u32 error_code);
482 bool (*exception_injected)(struct kvm_vcpu *vcpu);
483 void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
484 void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
485 struct kvm_run *run);
487 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
488 int (*get_tdp_level)(void);
489 int (*get_mt_mask_shift)(void);
492 extern struct kvm_x86_ops *kvm_x86_ops;
494 int kvm_mmu_module_init(void);
495 void kvm_mmu_module_exit(void);
497 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
498 int kvm_mmu_create(struct kvm_vcpu *vcpu);
499 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
500 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
501 void kvm_mmu_set_base_ptes(u64 base_pte);
502 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
503 u64 dirty_mask, u64 nx_mask, u64 x_mask, u64 mt_mask);
505 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
506 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
507 void kvm_mmu_zap_all(struct kvm *kvm);
508 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
509 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
511 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
513 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
514 const void *val, int bytes);
515 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
516 gpa_t addr, unsigned long *ret);
518 extern bool tdp_enabled;
520 enum emulation_result {
521 EMULATE_DONE, /* no further processing */
522 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
523 EMULATE_FAIL, /* can't emulate this instruction */
526 #define EMULTYPE_NO_DECODE (1 << 0)
527 #define EMULTYPE_TRAP_UD (1 << 1)
528 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
529 unsigned long cr2, u16 error_code, int emulation_type);
530 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
531 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
532 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
533 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
534 unsigned long *rflags);
536 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
537 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
538 unsigned long *rflags);
539 void kvm_enable_efer_bits(u64);
540 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
541 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
543 struct x86_emulate_ctxt;
545 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
546 int size, unsigned port);
547 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
548 int size, unsigned long count, int down,
549 gva_t address, int rep, unsigned port);
550 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
551 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
552 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
553 int emulate_clts(struct kvm_vcpu *vcpu);
554 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
555 unsigned long *dest);
556 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
557 unsigned long value);
559 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
560 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
561 int type_bits, int seg);
563 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
565 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
566 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
567 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
568 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
569 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
570 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
571 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
573 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
574 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
576 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
577 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
578 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
581 void kvm_pic_set_irq(void *opaque, int irq, int level);
583 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
585 void fx_init(struct kvm_vcpu *vcpu);
587 int emulator_read_std(unsigned long addr,
590 struct kvm_vcpu *vcpu);
591 int emulator_write_emulated(unsigned long addr,
594 struct kvm_vcpu *vcpu);
596 unsigned long segment_base(u16 selector);
598 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
599 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
600 const u8 *new, int bytes);
601 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
602 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
603 int kvm_mmu_load(struct kvm_vcpu *vcpu);
604 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
605 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
607 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
609 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
611 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
612 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
614 void kvm_enable_tdp(void);
615 void kvm_disable_tdp(void);
617 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
618 int complete_pio(struct kvm_vcpu *vcpu);
620 struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn);
622 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
624 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
626 return (struct kvm_mmu_page *)page_private(page);
629 static inline u16 kvm_read_fs(void)
632 asm("mov %%fs, %0" : "=g"(seg));
636 static inline u16 kvm_read_gs(void)
639 asm("mov %%gs, %0" : "=g"(seg));
643 static inline u16 kvm_read_ldt(void)
646 asm("sldt %0" : "=g"(ldt));
650 static inline void kvm_load_fs(u16 sel)
652 asm("mov %0, %%fs" : : "rm"(sel));
655 static inline void kvm_load_gs(u16 sel)
657 asm("mov %0, %%gs" : : "rm"(sel));
660 static inline void kvm_load_ldt(u16 sel)
662 asm("lldt %0" : : "rm"(sel));
665 static inline void kvm_get_idt(struct descriptor_table *table)
667 asm("sidt %0" : "=m"(*table));
670 static inline void kvm_get_gdt(struct descriptor_table *table)
672 asm("sgdt %0" : "=m"(*table));
675 static inline unsigned long kvm_read_tr_base(void)
678 asm("str %0" : "=g"(tr));
679 return segment_base(tr);
683 static inline unsigned long read_msr(unsigned long msr)
692 static inline void kvm_fx_save(struct i387_fxsave_struct *image)
694 asm("fxsave (%0)":: "r" (image));
697 static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
699 asm("fxrstor (%0)":: "r" (image));
702 static inline void kvm_fx_finit(void)
707 static inline u32 get_rdx_init_val(void)
709 return 0x600; /* P6 family */
712 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
714 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
717 #define MSR_IA32_TIME_STAMP_COUNTER 0x010
719 #define TSS_IOPB_BASE_OFFSET 0x66
720 #define TSS_BASE_SIZE 0x68
721 #define TSS_IOPB_SIZE (65536 / 8)
722 #define TSS_REDIRECTION_SIZE (256 / 8)
723 #define RMODE_TSS_SIZE \
724 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
727 TASK_SWITCH_CALL = 0,
728 TASK_SWITCH_IRET = 1,
730 TASK_SWITCH_GATE = 3,
734 * Hardware virtualization extension instructions may fault if a
735 * reboot turns off virtualization while processes are running.
736 * Trap the fault and ignore the instruction if that happens.
738 asmlinkage void kvm_handle_fault_on_reboot(void);
740 #define __kvm_handle_fault_on_reboot(insn) \
741 "666: " insn "\n\t" \
742 ".pushsection .fixup, \"ax\" \n" \
744 __ASM_SIZE(push) " $666b \n\t" \
745 "jmp kvm_handle_fault_on_reboot \n\t" \
747 ".pushsection __ex_table, \"a\" \n\t" \
748 _ASM_PTR " 666b, 667b \n\t" \
751 #define KVM_ARCH_WANT_MMU_NOTIFIER
752 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
753 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
755 #endif /* _ASM_X86_KVM_HOST_H */