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>
17 #include <linux/tracepoint.h>
18 #include <linux/cpumask.h>
20 #include <linux/kvm.h>
21 #include <linux/kvm_para.h>
22 #include <linux/kvm_types.h>
24 #include <asm/pvclock-abi.h>
27 #include <asm/msr-index.h>
29 #define KVM_MAX_VCPUS 64
30 #define KVM_MEMORY_SLOTS 32
31 /* memory slots that does not exposed to userspace */
32 #define KVM_PRIVATE_MEM_SLOTS 4
34 #define KVM_PIO_PAGE_OFFSET 1
35 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
37 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
38 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
39 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \
40 0xFFFFFF0000000000ULL)
42 #define INVALID_PAGE (~(hpa_t)0)
43 #define VALID_PAGE(x) ((x) != INVALID_PAGE)
45 #define UNMAPPED_GVA (~(gpa_t)0)
47 /* KVM Hugepage definitions for x86 */
48 #define KVM_NR_PAGE_SIZES 3
49 #define KVM_HPAGE_GFN_SHIFT(x) (((x) - 1) * 9)
50 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x))
51 #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x))
52 #define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1))
53 #define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE)
71 #define SELECTOR_TI_MASK (1 << 2)
72 #define SELECTOR_RPL_MASK 0x03
76 #define KVM_PERMILLE_MMU_PAGES 20
77 #define KVM_MIN_ALLOC_MMU_PAGES 64
78 #define KVM_MMU_HASH_SHIFT 10
79 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
80 #define KVM_MIN_FREE_MMU_PAGES 5
81 #define KVM_REFILL_PAGES 25
82 #define KVM_MAX_CPUID_ENTRIES 40
83 #define KVM_NR_FIXED_MTRR_REGION 88
84 #define KVM_NR_VAR_MTRR 8
86 extern spinlock_t kvm_lock;
87 extern struct list_head vm_list;
116 VCPU_EXREG_PDPTR = NR_VCPU_REGS,
130 #include <asm/kvm_emulate.h>
132 #define KVM_NR_MEM_OBJS 40
134 #define KVM_NR_DB_REGS 4
136 #define DR6_BD (1 << 13)
137 #define DR6_BS (1 << 14)
138 #define DR6_FIXED_1 0xffff0ff0
139 #define DR6_VOLATILE 0x0000e00f
141 #define DR7_BP_EN_MASK 0x000000ff
142 #define DR7_GE (1 << 9)
143 #define DR7_GD (1 << 13)
144 #define DR7_FIXED_1 0x00000400
145 #define DR7_VOLATILE 0xffff23ff
148 * We don't want allocation failures within the mmu code, so we preallocate
149 * enough memory for a single page fault in a cache.
151 struct kvm_mmu_memory_cache {
153 void *objects[KVM_NR_MEM_OBJS];
156 #define NR_PTE_CHAIN_ENTRIES 5
158 struct kvm_pte_chain {
159 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
160 struct hlist_node link;
164 * kvm_mmu_page_role, below, is defined as:
166 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
167 * bits 4:7 - page table level for this shadow (1-4)
168 * bits 8:9 - page table quadrant for 2-level guests
169 * bit 16 - direct mapping of virtual to physical mapping at gfn
170 * used for real mode and two-dimensional paging
171 * bits 17:19 - common access permissions for all ptes in this shadow page
173 union kvm_mmu_page_role {
179 unsigned pad_for_nice_hex_output:6;
188 struct kvm_mmu_page {
189 struct list_head link;
190 struct hlist_node hash_link;
193 * The following two entries are used to key the shadow page in the
197 union kvm_mmu_page_role role;
200 /* hold the gfn of each spte inside spt */
203 * One bit set per slot which has memory
204 * in this shadow page.
206 DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS);
207 bool multimapped; /* More than one parent_pte? */
209 int root_count; /* Currently serving as active root */
210 unsigned int unsync_children;
212 u64 *parent_pte; /* !multimapped */
213 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
215 DECLARE_BITMAP(unsync_child_bitmap, 512);
218 struct kvm_pv_mmu_op_buffer {
222 char buf[512] __aligned(sizeof(long));
225 struct kvm_pio_request {
233 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
234 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
238 void (*new_cr3)(struct kvm_vcpu *vcpu);
239 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
240 void (*free)(struct kvm_vcpu *vcpu);
241 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access,
243 void (*prefetch_page)(struct kvm_vcpu *vcpu,
244 struct kvm_mmu_page *page);
245 int (*sync_page)(struct kvm_vcpu *vcpu,
246 struct kvm_mmu_page *sp, bool clear_unsync);
247 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
250 int shadow_root_level;
251 union kvm_mmu_page_role base_role;
254 u64 rsvd_bits_mask[2][4];
257 struct kvm_vcpu_arch {
259 * rip and regs accesses must go through
260 * kvm_{register,rip}_{read,write} functions.
262 unsigned long regs[NR_VCPU_REGS];
267 unsigned long cr0_guest_owned_bits;
271 unsigned long cr4_guest_owned_bits;
274 u64 pdptrs[4]; /* pae */
277 struct kvm_lapic *apic; /* kernel irqchip context */
278 int32_t apic_arb_prio;
281 u64 ia32_misc_enable_msr;
282 bool tpr_access_reporting;
285 /* only needed in kvm_pv_mmu_op() path, but it's hot so
286 * put it here to avoid allocation */
287 struct kvm_pv_mmu_op_buffer mmu_op_buffer;
289 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
290 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
291 struct kvm_mmu_memory_cache mmu_page_cache;
292 struct kvm_mmu_memory_cache mmu_page_header_cache;
294 gfn_t last_pt_write_gfn;
295 int last_pt_write_count;
296 u64 *last_pte_updated;
300 gfn_t gfn; /* presumed gfn during guest pte update */
301 pfn_t pfn; /* pfn corresponding to that gfn */
302 unsigned long mmu_seq;
305 struct fpu guest_fpu;
308 gva_t mmio_fault_cr2;
309 struct kvm_pio_request pio;
312 u8 event_exit_inst_len;
314 struct kvm_queued_exception {
322 struct kvm_queued_interrupt {
328 int halt_request; /* real mode on Intel only */
331 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
332 /* emulate context */
334 struct x86_emulate_ctxt emulate_ctxt;
337 struct pvclock_vcpu_time_info hv_clock;
338 unsigned int hw_tsc_khz;
339 unsigned int time_offset;
340 struct page *time_page;
348 struct mtrr_state_type mtrr_state;
352 unsigned long db[KVM_NR_DB_REGS];
355 unsigned long eff_db[KVM_NR_DB_REGS];
362 /* used for guest single stepping over the given code position */
363 unsigned long singlestep_rip;
365 /* fields used by HYPER-V emulation */
368 cpumask_var_t wbinvd_dirty_mask;
372 unsigned int n_used_mmu_pages;
373 unsigned int n_requested_mmu_pages;
374 unsigned int n_max_mmu_pages;
375 atomic_t invlpg_counter;
376 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
378 * Hash table of struct kvm_mmu_page.
380 struct list_head active_mmu_pages;
381 struct list_head assigned_dev_head;
382 struct iommu_domain *iommu_domain;
384 struct kvm_pic *vpic;
385 struct kvm_ioapic *vioapic;
386 struct kvm_pit *vpit;
387 int vapics_in_nmi_mode;
389 unsigned int tss_addr;
390 struct page *apic_access_page;
394 struct page *ept_identity_pagetable;
395 bool ept_identity_pagetable_done;
396 gpa_t ept_identity_map_addr;
398 unsigned long irq_sources_bitmap;
400 spinlock_t tsc_write_lock;
405 struct kvm_xen_hvm_config xen_hvm_config;
407 /* fields used by HYPER-V emulation */
413 u32 mmu_shadow_zapped;
421 u32 remote_tlb_flush;
425 struct kvm_vcpu_stat {
435 u32 irq_window_exits;
436 u32 nmi_window_exits;
439 u32 request_irq_exits;
441 u32 host_state_reload;
445 u32 insn_emulation_fail;
452 int (*cpu_has_kvm_support)(void); /* __init */
453 int (*disabled_by_bios)(void); /* __init */
454 int (*hardware_enable)(void *dummy);
455 void (*hardware_disable)(void *dummy);
456 void (*check_processor_compatibility)(void *rtn);
457 int (*hardware_setup)(void); /* __init */
458 void (*hardware_unsetup)(void); /* __exit */
459 bool (*cpu_has_accelerated_tpr)(void);
460 void (*cpuid_update)(struct kvm_vcpu *vcpu);
462 /* Create, but do not attach this VCPU */
463 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
464 void (*vcpu_free)(struct kvm_vcpu *vcpu);
465 int (*vcpu_reset)(struct kvm_vcpu *vcpu);
467 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
468 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
469 void (*vcpu_put)(struct kvm_vcpu *vcpu);
471 void (*set_guest_debug)(struct kvm_vcpu *vcpu,
472 struct kvm_guest_debug *dbg);
473 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
474 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
475 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
476 void (*get_segment)(struct kvm_vcpu *vcpu,
477 struct kvm_segment *var, int seg);
478 int (*get_cpl)(struct kvm_vcpu *vcpu);
479 void (*set_segment)(struct kvm_vcpu *vcpu,
480 struct kvm_segment *var, int seg);
481 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
482 void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu);
483 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
484 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
485 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
486 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
487 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
488 void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
489 void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
490 void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
491 void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
492 void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value);
493 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
494 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
495 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
496 void (*fpu_activate)(struct kvm_vcpu *vcpu);
497 void (*fpu_deactivate)(struct kvm_vcpu *vcpu);
499 void (*tlb_flush)(struct kvm_vcpu *vcpu);
501 void (*run)(struct kvm_vcpu *vcpu);
502 int (*handle_exit)(struct kvm_vcpu *vcpu);
503 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
504 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
505 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
506 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
507 unsigned char *hypercall_addr);
508 void (*set_irq)(struct kvm_vcpu *vcpu);
509 void (*set_nmi)(struct kvm_vcpu *vcpu);
510 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
511 bool has_error_code, u32 error_code,
513 int (*interrupt_allowed)(struct kvm_vcpu *vcpu);
514 int (*nmi_allowed)(struct kvm_vcpu *vcpu);
515 bool (*get_nmi_mask)(struct kvm_vcpu *vcpu);
516 void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked);
517 void (*enable_nmi_window)(struct kvm_vcpu *vcpu);
518 void (*enable_irq_window)(struct kvm_vcpu *vcpu);
519 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr);
520 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
521 int (*get_tdp_level)(void);
522 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio);
523 int (*get_lpage_level)(void);
524 bool (*rdtscp_supported)(void);
525 void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment);
527 void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry);
529 bool (*has_wbinvd_exit)(void);
531 void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset);
533 const struct trace_print_flags *exit_reasons_str;
536 extern struct kvm_x86_ops *kvm_x86_ops;
538 int kvm_mmu_module_init(void);
539 void kvm_mmu_module_exit(void);
541 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
542 int kvm_mmu_create(struct kvm_vcpu *vcpu);
543 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
544 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
545 void kvm_mmu_set_base_ptes(u64 base_pte);
546 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
547 u64 dirty_mask, u64 nx_mask, u64 x_mask);
549 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
550 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
551 void kvm_mmu_zap_all(struct kvm *kvm);
552 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
553 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
555 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
557 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
558 const void *val, int bytes);
559 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
560 gpa_t addr, unsigned long *ret);
561 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
563 extern bool tdp_enabled;
565 enum emulation_result {
566 EMULATE_DONE, /* no further processing */
567 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
568 EMULATE_FAIL, /* can't emulate this instruction */
571 #define EMULTYPE_NO_DECODE (1 << 0)
572 #define EMULTYPE_TRAP_UD (1 << 1)
573 #define EMULTYPE_SKIP (1 << 2)
574 int emulate_instruction(struct kvm_vcpu *vcpu,
575 unsigned long cr2, u16 error_code, int emulation_type);
576 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
577 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
579 void kvm_enable_efer_bits(u64);
580 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
581 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
583 struct x86_emulate_ctxt;
585 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port);
586 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
587 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
588 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
589 int emulate_clts(struct kvm_vcpu *vcpu);
590 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu);
592 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
593 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg);
595 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason,
596 bool has_error_code, u32 error_code);
598 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
599 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
600 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
601 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
602 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val);
603 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val);
604 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
605 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
606 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
607 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr);
609 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
610 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
612 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu);
613 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags);
615 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
616 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
617 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr);
618 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
619 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
621 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
623 int kvm_pic_set_irq(void *opaque, int irq, int level);
625 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
627 int fx_init(struct kvm_vcpu *vcpu);
629 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
630 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
631 const u8 *new, int bytes,
632 bool guest_initiated);
633 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
634 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
635 int kvm_mmu_load(struct kvm_vcpu *vcpu);
636 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
637 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
638 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
639 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
640 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
641 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
643 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
645 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
647 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
648 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
650 void kvm_enable_tdp(void);
651 void kvm_disable_tdp(void);
653 int complete_pio(struct kvm_vcpu *vcpu);
654 bool kvm_check_iopl(struct kvm_vcpu *vcpu);
656 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
658 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
660 return (struct kvm_mmu_page *)page_private(page);
663 static inline u16 kvm_read_ldt(void)
666 asm("sldt %0" : "=g"(ldt));
670 static inline void kvm_load_ldt(u16 sel)
672 asm("lldt %0" : : "rm"(sel));
676 static inline unsigned long read_msr(unsigned long msr)
685 static inline u32 get_rdx_init_val(void)
687 return 0x600; /* P6 family */
690 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
692 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
695 #define TSS_IOPB_BASE_OFFSET 0x66
696 #define TSS_BASE_SIZE 0x68
697 #define TSS_IOPB_SIZE (65536 / 8)
698 #define TSS_REDIRECTION_SIZE (256 / 8)
699 #define RMODE_TSS_SIZE \
700 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
703 TASK_SWITCH_CALL = 0,
704 TASK_SWITCH_IRET = 1,
706 TASK_SWITCH_GATE = 3,
709 #define HF_GIF_MASK (1 << 0)
710 #define HF_HIF_MASK (1 << 1)
711 #define HF_VINTR_MASK (1 << 2)
712 #define HF_NMI_MASK (1 << 3)
713 #define HF_IRET_MASK (1 << 4)
716 * Hardware virtualization extension instructions may fault if a
717 * reboot turns off virtualization while processes are running.
718 * Trap the fault and ignore the instruction if that happens.
720 asmlinkage void kvm_handle_fault_on_reboot(void);
722 #define __kvm_handle_fault_on_reboot(insn) \
723 "666: " insn "\n\t" \
724 ".pushsection .fixup, \"ax\" \n" \
726 __ASM_SIZE(push) " $666b \n\t" \
727 "jmp kvm_handle_fault_on_reboot \n\t" \
729 ".pushsection __ex_table, \"a\" \n\t" \
730 _ASM_PTR " 666b, 667b \n\t" \
733 #define KVM_ARCH_WANT_MMU_NOTIFIER
734 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
735 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
736 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
737 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu);
738 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
739 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
740 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
742 void kvm_define_shared_msr(unsigned index, u32 msr);
743 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask);
745 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip);
747 #endif /* _ASM_X86_KVM_HOST_H */