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 #define KVM_NR_DB_REGS 4
140 #define DR6_BD (1 << 13)
141 #define DR6_BS (1 << 14)
142 #define DR6_FIXED_1 0xffff0ff0
143 #define DR6_VOLATILE 0x0000e00f
145 #define DR7_BP_EN_MASK 0x000000ff
146 #define DR7_GE (1 << 9)
147 #define DR7_GD (1 << 13)
148 #define DR7_FIXED_1 0x00000400
149 #define DR7_VOLATILE 0xffff23ff
152 * We don't want allocation failures within the mmu code, so we preallocate
153 * enough memory for a single page fault in a cache.
155 struct kvm_mmu_memory_cache {
157 void *objects[KVM_NR_MEM_OBJS];
160 #define NR_PTE_CHAIN_ENTRIES 5
162 struct kvm_pte_chain {
163 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
164 struct hlist_node link;
168 * kvm_mmu_page_role, below, is defined as:
170 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
171 * bits 4:7 - page table level for this shadow (1-4)
172 * bits 8:9 - page table quadrant for 2-level guests
173 * bit 16 - direct mapping of virtual to physical mapping at gfn
174 * used for real mode and two-dimensional paging
175 * bits 17:19 - common access permissions for all ptes in this shadow page
177 union kvm_mmu_page_role {
183 unsigned pad_for_nice_hex_output:6;
191 struct kvm_mmu_page {
192 struct list_head link;
193 struct hlist_node hash_link;
195 struct list_head oos_link;
198 * The following two entries are used to key the shadow page in the
202 union kvm_mmu_page_role role;
205 /* hold the gfn of each spte inside spt */
208 * One bit set per slot which has memory
209 * in this shadow page.
211 DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS);
212 int multimapped; /* More than one parent_pte? */
213 int root_count; /* Currently serving as active root */
216 unsigned int unsync_children;
218 u64 *parent_pte; /* !multimapped */
219 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
221 DECLARE_BITMAP(unsync_child_bitmap, 512);
224 struct kvm_pv_mmu_op_buffer {
228 char buf[512] __aligned(sizeof(long));
231 struct kvm_pio_request {
244 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
245 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
249 void (*new_cr3)(struct kvm_vcpu *vcpu);
250 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
251 void (*free)(struct kvm_vcpu *vcpu);
252 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
253 void (*prefetch_page)(struct kvm_vcpu *vcpu,
254 struct kvm_mmu_page *page);
255 int (*sync_page)(struct kvm_vcpu *vcpu,
256 struct kvm_mmu_page *sp);
257 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
260 int shadow_root_level;
261 union kvm_mmu_page_role base_role;
266 struct kvm_vcpu_arch {
268 int interrupt_window_open;
269 unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
270 DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
272 * rip and regs accesses must go through
273 * kvm_{register,rip}_{read,write} functions.
275 unsigned long regs[NR_VCPU_REGS];
285 u64 pdptrs[4]; /* pae */
288 struct kvm_lapic *apic; /* kernel irqchip context */
291 u64 ia32_misc_enable_msr;
292 bool tpr_access_reporting;
295 /* only needed in kvm_pv_mmu_op() path, but it's hot so
296 * put it here to avoid allocation */
297 struct kvm_pv_mmu_op_buffer mmu_op_buffer;
299 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
300 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
301 struct kvm_mmu_memory_cache mmu_page_cache;
302 struct kvm_mmu_memory_cache mmu_page_header_cache;
304 gfn_t last_pt_write_gfn;
305 int last_pt_write_count;
306 u64 *last_pte_updated;
310 gfn_t gfn; /* presumed gfn during guest pte update */
311 pfn_t pfn; /* pfn corresponding to that gfn */
313 unsigned long mmu_seq;
316 struct i387_fxsave_struct host_fx_image;
317 struct i387_fxsave_struct guest_fx_image;
319 gva_t mmio_fault_cr2;
320 struct kvm_pio_request pio;
323 struct kvm_queued_exception {
330 struct kvm_queued_interrupt {
338 struct kvm_save_segment {
343 } tr, es, ds, fs, gs;
345 int halt_request; /* real mode on Intel only */
348 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
349 /* emulate context */
351 struct x86_emulate_ctxt emulate_ctxt;
354 struct pvclock_vcpu_time_info hv_clock;
355 unsigned int hv_clock_tsc_khz;
356 unsigned int time_offset;
357 struct page *time_page;
361 bool nmi_window_open;
363 struct mtrr_state_type mtrr_state;
367 unsigned long host_db[KVM_NR_DB_REGS];
368 unsigned long host_dr6;
369 unsigned long host_dr7;
370 unsigned long db[KVM_NR_DB_REGS];
373 unsigned long eff_db[KVM_NR_DB_REGS];
376 struct kvm_mem_alias {
378 unsigned long npages;
384 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
386 unsigned int n_free_mmu_pages;
387 unsigned int n_requested_mmu_pages;
388 unsigned int n_alloc_mmu_pages;
389 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
391 * Hash table of struct kvm_mmu_page.
393 struct list_head active_mmu_pages;
394 struct list_head assigned_dev_head;
395 struct list_head oos_global_pages;
396 struct iommu_domain *iommu_domain;
397 struct kvm_pic *vpic;
398 struct kvm_ioapic *vioapic;
399 struct kvm_pit *vpit;
400 struct hlist_head irq_ack_notifier_list;
401 int vapics_in_nmi_mode;
403 int round_robin_prev_vcpu;
404 unsigned int tss_addr;
405 struct page *apic_access_page;
409 struct page *ept_identity_pagetable;
410 bool ept_identity_pagetable_done;
412 unsigned long irq_sources_bitmap;
413 unsigned long irq_states[KVM_IOAPIC_NUM_PINS];
418 u32 mmu_shadow_zapped;
426 u32 mmu_unsync_global;
427 u32 remote_tlb_flush;
431 struct kvm_vcpu_stat {
441 u32 irq_window_exits;
442 u32 nmi_window_exits;
445 u32 request_irq_exits;
446 u32 request_nmi_exits;
448 u32 host_state_reload;
452 u32 insn_emulation_fail;
458 struct descriptor_table {
461 } __attribute__((packed));
464 int (*cpu_has_kvm_support)(void); /* __init */
465 int (*disabled_by_bios)(void); /* __init */
466 void (*hardware_enable)(void *dummy); /* __init */
467 void (*hardware_disable)(void *dummy);
468 void (*check_processor_compatibility)(void *rtn);
469 int (*hardware_setup)(void); /* __init */
470 void (*hardware_unsetup)(void); /* __exit */
471 bool (*cpu_has_accelerated_tpr)(void);
473 /* Create, but do not attach this VCPU */
474 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
475 void (*vcpu_free)(struct kvm_vcpu *vcpu);
476 int (*vcpu_reset)(struct kvm_vcpu *vcpu);
478 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
479 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
480 void (*vcpu_put)(struct kvm_vcpu *vcpu);
482 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
483 struct kvm_guest_debug *dbg);
484 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
485 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
486 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
487 void (*get_segment)(struct kvm_vcpu *vcpu,
488 struct kvm_segment *var, int seg);
489 int (*get_cpl)(struct kvm_vcpu *vcpu);
490 void (*set_segment)(struct kvm_vcpu *vcpu,
491 struct kvm_segment *var, int seg);
492 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
493 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
494 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
495 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
496 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
497 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
498 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
499 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
500 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
501 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
502 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
503 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
505 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
506 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
507 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
509 void (*tlb_flush)(struct kvm_vcpu *vcpu);
511 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
512 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
513 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
514 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
515 unsigned char *hypercall_addr);
516 int (*get_irq)(struct kvm_vcpu *vcpu);
517 void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
518 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
519 bool has_error_code, u32 error_code);
520 bool (*exception_injected)(struct kvm_vcpu *vcpu);
521 void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
522 void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
523 struct kvm_run *run);
525 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
526 int (*get_tdp_level)(void);
527 int (*get_mt_mask_shift)(void);
530 extern struct kvm_x86_ops *kvm_x86_ops;
532 int kvm_mmu_module_init(void);
533 void kvm_mmu_module_exit(void);
535 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
536 int kvm_mmu_create(struct kvm_vcpu *vcpu);
537 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
538 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
539 void kvm_mmu_set_base_ptes(u64 base_pte);
540 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
541 u64 dirty_mask, u64 nx_mask, u64 x_mask, u64 mt_mask);
543 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
544 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
545 void kvm_mmu_zap_all(struct kvm *kvm);
546 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
547 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
549 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
551 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
552 const void *val, int bytes);
553 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
554 gpa_t addr, unsigned long *ret);
556 extern bool tdp_enabled;
558 enum emulation_result {
559 EMULATE_DONE, /* no further processing */
560 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
561 EMULATE_FAIL, /* can't emulate this instruction */
564 #define EMULTYPE_NO_DECODE (1 << 0)
565 #define EMULTYPE_TRAP_UD (1 << 1)
566 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
567 unsigned long cr2, u16 error_code, int emulation_type);
568 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
569 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
570 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
571 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
572 unsigned long *rflags);
574 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
575 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
576 unsigned long *rflags);
577 void kvm_enable_efer_bits(u64);
578 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
579 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
581 struct x86_emulate_ctxt;
583 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
584 int size, unsigned port);
585 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
586 int size, unsigned long count, int down,
587 gva_t address, int rep, unsigned port);
588 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
589 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
590 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
591 int emulate_clts(struct kvm_vcpu *vcpu);
592 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
593 unsigned long *dest);
594 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
595 unsigned long value);
597 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
598 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
599 int type_bits, int seg);
601 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
603 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
604 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
605 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
606 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
607 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
608 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
609 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
611 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
612 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
614 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
615 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
616 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
619 int kvm_pic_set_irq(void *opaque, int irq, int level);
621 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
623 void fx_init(struct kvm_vcpu *vcpu);
625 int emulator_write_emulated(unsigned long addr,
628 struct kvm_vcpu *vcpu);
630 unsigned long segment_base(u16 selector);
632 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
633 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
634 const u8 *new, int bytes,
635 bool guest_initiated);
636 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
637 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
638 int kvm_mmu_load(struct kvm_vcpu *vcpu);
639 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
640 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
641 void kvm_mmu_sync_global(struct kvm_vcpu *vcpu);
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 load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
654 int complete_pio(struct kvm_vcpu *vcpu);
656 struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn);
658 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
660 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
662 return (struct kvm_mmu_page *)page_private(page);
665 static inline u16 kvm_read_fs(void)
668 asm("mov %%fs, %0" : "=g"(seg));
672 static inline u16 kvm_read_gs(void)
675 asm("mov %%gs, %0" : "=g"(seg));
679 static inline u16 kvm_read_ldt(void)
682 asm("sldt %0" : "=g"(ldt));
686 static inline void kvm_load_fs(u16 sel)
688 asm("mov %0, %%fs" : : "rm"(sel));
691 static inline void kvm_load_gs(u16 sel)
693 asm("mov %0, %%gs" : : "rm"(sel));
696 static inline void kvm_load_ldt(u16 sel)
698 asm("lldt %0" : : "rm"(sel));
701 static inline void kvm_get_idt(struct descriptor_table *table)
703 asm("sidt %0" : "=m"(*table));
706 static inline void kvm_get_gdt(struct descriptor_table *table)
708 asm("sgdt %0" : "=m"(*table));
711 static inline unsigned long kvm_read_tr_base(void)
714 asm("str %0" : "=g"(tr));
715 return segment_base(tr);
719 static inline unsigned long read_msr(unsigned long msr)
728 static inline void kvm_fx_save(struct i387_fxsave_struct *image)
730 asm("fxsave (%0)":: "r" (image));
733 static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
735 asm("fxrstor (%0)":: "r" (image));
738 static inline void kvm_fx_finit(void)
743 static inline u32 get_rdx_init_val(void)
745 return 0x600; /* P6 family */
748 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
750 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
753 #define MSR_IA32_TIME_STAMP_COUNTER 0x010
755 #define TSS_IOPB_BASE_OFFSET 0x66
756 #define TSS_BASE_SIZE 0x68
757 #define TSS_IOPB_SIZE (65536 / 8)
758 #define TSS_REDIRECTION_SIZE (256 / 8)
759 #define RMODE_TSS_SIZE \
760 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
763 TASK_SWITCH_CALL = 0,
764 TASK_SWITCH_IRET = 1,
766 TASK_SWITCH_GATE = 3,
769 #define HF_GIF_MASK (1 << 0)
770 #define HF_HIF_MASK (1 << 1)
771 #define HF_VINTR_MASK (1 << 2)
774 * Hardware virtualization extension instructions may fault if a
775 * reboot turns off virtualization while processes are running.
776 * Trap the fault and ignore the instruction if that happens.
778 asmlinkage void kvm_handle_fault_on_reboot(void);
780 #define __kvm_handle_fault_on_reboot(insn) \
781 "666: " insn "\n\t" \
782 ".pushsection .fixup, \"ax\" \n" \
784 __ASM_SIZE(push) " $666b \n\t" \
785 "jmp kvm_handle_fault_on_reboot \n\t" \
787 ".pushsection __ex_table, \"a\" \n\t" \
788 _ASM_PTR " 666b, 667b \n\t" \
791 #define KVM_ARCH_WANT_MMU_NOTIFIER
792 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
793 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
795 #endif /* _ASM_X86_KVM_HOST_H */