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 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root);
240 unsigned long (*get_cr3)(struct kvm_vcpu *vcpu);
241 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
242 void (*inject_page_fault)(struct kvm_vcpu *vcpu);
243 void (*free)(struct kvm_vcpu *vcpu);
244 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access,
246 gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access);
247 void (*prefetch_page)(struct kvm_vcpu *vcpu,
248 struct kvm_mmu_page *page);
249 int (*sync_page)(struct kvm_vcpu *vcpu,
250 struct kvm_mmu_page *sp, bool clear_unsync);
251 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
254 int shadow_root_level;
255 union kvm_mmu_page_role base_role;
259 u64 rsvd_bits_mask[2][4];
262 struct kvm_vcpu_arch {
264 * rip and regs accesses must go through
265 * kvm_{register,rip}_{read,write} functions.
267 unsigned long regs[NR_VCPU_REGS];
272 unsigned long cr0_guest_owned_bits;
276 unsigned long cr4_guest_owned_bits;
279 u64 pdptrs[4]; /* pae */
282 struct kvm_lapic *apic; /* kernel irqchip context */
283 int32_t apic_arb_prio;
286 u64 ia32_misc_enable_msr;
287 bool tpr_access_reporting;
290 * Paging state of the vcpu
292 * If the vcpu runs in guest mode with two level paging this still saves
293 * the paging mode of the l1 guest. This context is always used to
299 * Paging state of an L2 guest (used for nested npt)
301 * This context will save all necessary information to walk page tables
302 * of the an L2 guest. This context is only initialized for page table
303 * walking and not for faulting since we never handle l2 page faults on
306 struct kvm_mmu nested_mmu;
309 * Pointer to the mmu context currently used for
310 * gva_to_gpa translations.
312 struct kvm_mmu *walk_mmu;
315 * This struct is filled with the necessary information to propagate a
316 * page fault into the guest
323 /* only needed in kvm_pv_mmu_op() path, but it's hot so
324 * put it here to avoid allocation */
325 struct kvm_pv_mmu_op_buffer mmu_op_buffer;
327 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
328 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
329 struct kvm_mmu_memory_cache mmu_page_cache;
330 struct kvm_mmu_memory_cache mmu_page_header_cache;
332 gfn_t last_pt_write_gfn;
333 int last_pt_write_count;
334 u64 *last_pte_updated;
338 gfn_t gfn; /* presumed gfn during guest pte update */
339 pfn_t pfn; /* pfn corresponding to that gfn */
340 unsigned long mmu_seq;
343 struct fpu guest_fpu;
346 gva_t mmio_fault_cr2;
347 struct kvm_pio_request pio;
350 u8 event_exit_inst_len;
352 struct kvm_queued_exception {
360 struct kvm_queued_interrupt {
366 int halt_request; /* real mode on Intel only */
369 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
370 /* emulate context */
372 struct x86_emulate_ctxt emulate_ctxt;
375 struct pvclock_vcpu_time_info hv_clock;
376 unsigned int hw_tsc_khz;
377 unsigned int time_offset;
378 struct page *time_page;
386 struct mtrr_state_type mtrr_state;
390 unsigned long db[KVM_NR_DB_REGS];
393 unsigned long eff_db[KVM_NR_DB_REGS];
400 /* used for guest single stepping over the given code position */
401 unsigned long singlestep_rip;
403 /* fields used by HYPER-V emulation */
406 cpumask_var_t wbinvd_dirty_mask;
410 unsigned int n_used_mmu_pages;
411 unsigned int n_requested_mmu_pages;
412 unsigned int n_max_mmu_pages;
413 atomic_t invlpg_counter;
414 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
416 * Hash table of struct kvm_mmu_page.
418 struct list_head active_mmu_pages;
419 struct list_head assigned_dev_head;
420 struct iommu_domain *iommu_domain;
422 struct kvm_pic *vpic;
423 struct kvm_ioapic *vioapic;
424 struct kvm_pit *vpit;
425 int vapics_in_nmi_mode;
427 unsigned int tss_addr;
428 struct page *apic_access_page;
432 struct page *ept_identity_pagetable;
433 bool ept_identity_pagetable_done;
434 gpa_t ept_identity_map_addr;
436 unsigned long irq_sources_bitmap;
438 spinlock_t tsc_write_lock;
443 struct kvm_xen_hvm_config xen_hvm_config;
445 /* fields used by HYPER-V emulation */
451 u32 mmu_shadow_zapped;
459 u32 remote_tlb_flush;
463 struct kvm_vcpu_stat {
473 u32 irq_window_exits;
474 u32 nmi_window_exits;
477 u32 request_irq_exits;
479 u32 host_state_reload;
483 u32 insn_emulation_fail;
490 int (*cpu_has_kvm_support)(void); /* __init */
491 int (*disabled_by_bios)(void); /* __init */
492 int (*hardware_enable)(void *dummy);
493 void (*hardware_disable)(void *dummy);
494 void (*check_processor_compatibility)(void *rtn);
495 int (*hardware_setup)(void); /* __init */
496 void (*hardware_unsetup)(void); /* __exit */
497 bool (*cpu_has_accelerated_tpr)(void);
498 void (*cpuid_update)(struct kvm_vcpu *vcpu);
500 /* Create, but do not attach this VCPU */
501 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
502 void (*vcpu_free)(struct kvm_vcpu *vcpu);
503 int (*vcpu_reset)(struct kvm_vcpu *vcpu);
505 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
506 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
507 void (*vcpu_put)(struct kvm_vcpu *vcpu);
509 void (*set_guest_debug)(struct kvm_vcpu *vcpu,
510 struct kvm_guest_debug *dbg);
511 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
512 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
513 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
514 void (*get_segment)(struct kvm_vcpu *vcpu,
515 struct kvm_segment *var, int seg);
516 int (*get_cpl)(struct kvm_vcpu *vcpu);
517 void (*set_segment)(struct kvm_vcpu *vcpu,
518 struct kvm_segment *var, int seg);
519 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
520 void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu);
521 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
522 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
523 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
524 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
525 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
526 void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
527 void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
528 void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
529 void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
530 void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value);
531 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
532 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
533 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
534 void (*fpu_activate)(struct kvm_vcpu *vcpu);
535 void (*fpu_deactivate)(struct kvm_vcpu *vcpu);
537 void (*tlb_flush)(struct kvm_vcpu *vcpu);
539 void (*run)(struct kvm_vcpu *vcpu);
540 int (*handle_exit)(struct kvm_vcpu *vcpu);
541 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
542 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
543 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
544 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
545 unsigned char *hypercall_addr);
546 void (*set_irq)(struct kvm_vcpu *vcpu);
547 void (*set_nmi)(struct kvm_vcpu *vcpu);
548 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
549 bool has_error_code, u32 error_code,
551 int (*interrupt_allowed)(struct kvm_vcpu *vcpu);
552 int (*nmi_allowed)(struct kvm_vcpu *vcpu);
553 bool (*get_nmi_mask)(struct kvm_vcpu *vcpu);
554 void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked);
555 void (*enable_nmi_window)(struct kvm_vcpu *vcpu);
556 void (*enable_irq_window)(struct kvm_vcpu *vcpu);
557 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr);
558 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
559 int (*get_tdp_level)(void);
560 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio);
561 int (*get_lpage_level)(void);
562 bool (*rdtscp_supported)(void);
563 void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment);
565 void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
567 void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry);
569 bool (*has_wbinvd_exit)(void);
571 void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset);
573 const struct trace_print_flags *exit_reasons_str;
576 extern struct kvm_x86_ops *kvm_x86_ops;
578 int kvm_mmu_module_init(void);
579 void kvm_mmu_module_exit(void);
581 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
582 int kvm_mmu_create(struct kvm_vcpu *vcpu);
583 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
584 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
585 void kvm_mmu_set_base_ptes(u64 base_pte);
586 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
587 u64 dirty_mask, u64 nx_mask, u64 x_mask);
589 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
590 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
591 void kvm_mmu_zap_all(struct kvm *kvm);
592 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
593 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
595 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
597 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
598 const void *val, int bytes);
599 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
600 gpa_t addr, unsigned long *ret);
601 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
603 extern bool tdp_enabled;
605 enum emulation_result {
606 EMULATE_DONE, /* no further processing */
607 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
608 EMULATE_FAIL, /* can't emulate this instruction */
611 #define EMULTYPE_NO_DECODE (1 << 0)
612 #define EMULTYPE_TRAP_UD (1 << 1)
613 #define EMULTYPE_SKIP (1 << 2)
614 int emulate_instruction(struct kvm_vcpu *vcpu,
615 unsigned long cr2, u16 error_code, int emulation_type);
616 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
617 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
619 void kvm_enable_efer_bits(u64);
620 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
621 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
623 struct x86_emulate_ctxt;
625 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port);
626 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
627 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
628 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
629 int emulate_clts(struct kvm_vcpu *vcpu);
630 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu);
632 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
633 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg);
635 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason,
636 bool has_error_code, u32 error_code);
638 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
639 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
640 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
641 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
642 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val);
643 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val);
644 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
645 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
646 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
647 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr);
649 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
650 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
652 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu);
653 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags);
655 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
656 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
657 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr);
658 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
659 void kvm_inject_page_fault(struct kvm_vcpu *vcpu);
660 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
661 gfn_t gfn, void *data, int offset, int len,
663 void kvm_propagate_fault(struct kvm_vcpu *vcpu);
664 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
666 int kvm_pic_set_irq(void *opaque, int irq, int level);
668 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
670 int fx_init(struct kvm_vcpu *vcpu);
672 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
673 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
674 const u8 *new, int bytes,
675 bool guest_initiated);
676 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
677 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
678 int kvm_mmu_load(struct kvm_vcpu *vcpu);
679 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
680 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
681 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
682 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
683 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
684 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
686 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
688 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
690 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
691 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
693 void kvm_enable_tdp(void);
694 void kvm_disable_tdp(void);
696 int complete_pio(struct kvm_vcpu *vcpu);
697 bool kvm_check_iopl(struct kvm_vcpu *vcpu);
699 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
701 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
703 return (struct kvm_mmu_page *)page_private(page);
706 static inline u16 kvm_read_ldt(void)
709 asm("sldt %0" : "=g"(ldt));
713 static inline void kvm_load_ldt(u16 sel)
715 asm("lldt %0" : : "rm"(sel));
719 static inline unsigned long read_msr(unsigned long msr)
728 static inline u32 get_rdx_init_val(void)
730 return 0x600; /* P6 family */
733 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
735 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
738 #define TSS_IOPB_BASE_OFFSET 0x66
739 #define TSS_BASE_SIZE 0x68
740 #define TSS_IOPB_SIZE (65536 / 8)
741 #define TSS_REDIRECTION_SIZE (256 / 8)
742 #define RMODE_TSS_SIZE \
743 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
746 TASK_SWITCH_CALL = 0,
747 TASK_SWITCH_IRET = 1,
749 TASK_SWITCH_GATE = 3,
752 #define HF_GIF_MASK (1 << 0)
753 #define HF_HIF_MASK (1 << 1)
754 #define HF_VINTR_MASK (1 << 2)
755 #define HF_NMI_MASK (1 << 3)
756 #define HF_IRET_MASK (1 << 4)
759 * Hardware virtualization extension instructions may fault if a
760 * reboot turns off virtualization while processes are running.
761 * Trap the fault and ignore the instruction if that happens.
763 asmlinkage void kvm_handle_fault_on_reboot(void);
765 #define __kvm_handle_fault_on_reboot(insn) \
766 "666: " insn "\n\t" \
767 ".pushsection .fixup, \"ax\" \n" \
769 __ASM_SIZE(push) " $666b \n\t" \
770 "jmp kvm_handle_fault_on_reboot \n\t" \
772 ".pushsection __ex_table, \"a\" \n\t" \
773 _ASM_PTR " 666b, 667b \n\t" \
776 #define KVM_ARCH_WANT_MMU_NOTIFIER
777 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
778 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
779 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
780 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu);
781 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
782 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
783 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
785 void kvm_define_shared_msr(unsigned index, u32 msr);
786 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask);
788 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip);
790 #endif /* _ASM_X86_KVM_HOST_H */