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;
260 u64 rsvd_bits_mask[2][4];
262 u64 pdptrs[4]; /* pae */
265 struct kvm_vcpu_arch {
267 * rip and regs accesses must go through
268 * kvm_{register,rip}_{read,write} functions.
270 unsigned long regs[NR_VCPU_REGS];
275 unsigned long cr0_guest_owned_bits;
279 unsigned long cr4_guest_owned_bits;
284 struct kvm_lapic *apic; /* kernel irqchip context */
285 int32_t apic_arb_prio;
288 u64 ia32_misc_enable_msr;
289 bool tpr_access_reporting;
292 * Paging state of the vcpu
294 * If the vcpu runs in guest mode with two level paging this still saves
295 * the paging mode of the l1 guest. This context is always used to
301 * Paging state of an L2 guest (used for nested npt)
303 * This context will save all necessary information to walk page tables
304 * of the an L2 guest. This context is only initialized for page table
305 * walking and not for faulting since we never handle l2 page faults on
308 struct kvm_mmu nested_mmu;
311 * Pointer to the mmu context currently used for
312 * gva_to_gpa translations.
314 struct kvm_mmu *walk_mmu;
317 * This struct is filled with the necessary information to propagate a
318 * page fault into the guest
325 /* only needed in kvm_pv_mmu_op() path, but it's hot so
326 * put it here to avoid allocation */
327 struct kvm_pv_mmu_op_buffer mmu_op_buffer;
329 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
330 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
331 struct kvm_mmu_memory_cache mmu_page_cache;
332 struct kvm_mmu_memory_cache mmu_page_header_cache;
334 gfn_t last_pt_write_gfn;
335 int last_pt_write_count;
336 u64 *last_pte_updated;
340 gfn_t gfn; /* presumed gfn during guest pte update */
341 pfn_t pfn; /* pfn corresponding to that gfn */
342 unsigned long mmu_seq;
345 struct fpu guest_fpu;
348 gva_t mmio_fault_cr2;
349 struct kvm_pio_request pio;
352 u8 event_exit_inst_len;
354 struct kvm_queued_exception {
362 struct kvm_queued_interrupt {
368 int halt_request; /* real mode on Intel only */
371 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
372 /* emulate context */
374 struct x86_emulate_ctxt emulate_ctxt;
377 struct pvclock_vcpu_time_info hv_clock;
378 unsigned int hw_tsc_khz;
379 unsigned int time_offset;
380 struct page *time_page;
388 struct mtrr_state_type mtrr_state;
392 unsigned long db[KVM_NR_DB_REGS];
395 unsigned long eff_db[KVM_NR_DB_REGS];
402 /* used for guest single stepping over the given code position */
403 unsigned long singlestep_rip;
405 /* fields used by HYPER-V emulation */
408 cpumask_var_t wbinvd_dirty_mask;
412 unsigned int n_used_mmu_pages;
413 unsigned int n_requested_mmu_pages;
414 unsigned int n_max_mmu_pages;
415 atomic_t invlpg_counter;
416 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
418 * Hash table of struct kvm_mmu_page.
420 struct list_head active_mmu_pages;
421 struct list_head assigned_dev_head;
422 struct iommu_domain *iommu_domain;
424 struct kvm_pic *vpic;
425 struct kvm_ioapic *vioapic;
426 struct kvm_pit *vpit;
427 int vapics_in_nmi_mode;
429 unsigned int tss_addr;
430 struct page *apic_access_page;
434 struct page *ept_identity_pagetable;
435 bool ept_identity_pagetable_done;
436 gpa_t ept_identity_map_addr;
438 unsigned long irq_sources_bitmap;
440 spinlock_t tsc_write_lock;
445 struct kvm_xen_hvm_config xen_hvm_config;
447 /* fields used by HYPER-V emulation */
453 u32 mmu_shadow_zapped;
461 u32 remote_tlb_flush;
465 struct kvm_vcpu_stat {
475 u32 irq_window_exits;
476 u32 nmi_window_exits;
479 u32 request_irq_exits;
481 u32 host_state_reload;
485 u32 insn_emulation_fail;
492 int (*cpu_has_kvm_support)(void); /* __init */
493 int (*disabled_by_bios)(void); /* __init */
494 int (*hardware_enable)(void *dummy);
495 void (*hardware_disable)(void *dummy);
496 void (*check_processor_compatibility)(void *rtn);
497 int (*hardware_setup)(void); /* __init */
498 void (*hardware_unsetup)(void); /* __exit */
499 bool (*cpu_has_accelerated_tpr)(void);
500 void (*cpuid_update)(struct kvm_vcpu *vcpu);
502 /* Create, but do not attach this VCPU */
503 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
504 void (*vcpu_free)(struct kvm_vcpu *vcpu);
505 int (*vcpu_reset)(struct kvm_vcpu *vcpu);
507 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
508 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
509 void (*vcpu_put)(struct kvm_vcpu *vcpu);
511 void (*set_guest_debug)(struct kvm_vcpu *vcpu,
512 struct kvm_guest_debug *dbg);
513 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
514 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
515 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
516 void (*get_segment)(struct kvm_vcpu *vcpu,
517 struct kvm_segment *var, int seg);
518 int (*get_cpl)(struct kvm_vcpu *vcpu);
519 void (*set_segment)(struct kvm_vcpu *vcpu,
520 struct kvm_segment *var, int seg);
521 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
522 void (*decache_cr0_guest_bits)(struct kvm_vcpu *vcpu);
523 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
524 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
525 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
526 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
527 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
528 void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
529 void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
530 void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
531 void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
532 void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value);
533 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
534 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
535 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
536 void (*fpu_activate)(struct kvm_vcpu *vcpu);
537 void (*fpu_deactivate)(struct kvm_vcpu *vcpu);
539 void (*tlb_flush)(struct kvm_vcpu *vcpu);
541 void (*run)(struct kvm_vcpu *vcpu);
542 int (*handle_exit)(struct kvm_vcpu *vcpu);
543 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
544 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
545 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
546 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
547 unsigned char *hypercall_addr);
548 void (*set_irq)(struct kvm_vcpu *vcpu);
549 void (*set_nmi)(struct kvm_vcpu *vcpu);
550 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
551 bool has_error_code, u32 error_code,
553 int (*interrupt_allowed)(struct kvm_vcpu *vcpu);
554 int (*nmi_allowed)(struct kvm_vcpu *vcpu);
555 bool (*get_nmi_mask)(struct kvm_vcpu *vcpu);
556 void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked);
557 void (*enable_nmi_window)(struct kvm_vcpu *vcpu);
558 void (*enable_irq_window)(struct kvm_vcpu *vcpu);
559 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr);
560 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
561 int (*get_tdp_level)(void);
562 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio);
563 int (*get_lpage_level)(void);
564 bool (*rdtscp_supported)(void);
565 void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment);
567 void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
569 void (*set_supported_cpuid)(u32 func, struct kvm_cpuid_entry2 *entry);
571 bool (*has_wbinvd_exit)(void);
573 void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset);
575 const struct trace_print_flags *exit_reasons_str;
578 extern struct kvm_x86_ops *kvm_x86_ops;
580 int kvm_mmu_module_init(void);
581 void kvm_mmu_module_exit(void);
583 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
584 int kvm_mmu_create(struct kvm_vcpu *vcpu);
585 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
586 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
587 void kvm_mmu_set_base_ptes(u64 base_pte);
588 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
589 u64 dirty_mask, u64 nx_mask, u64 x_mask);
591 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
592 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
593 void kvm_mmu_zap_all(struct kvm *kvm);
594 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
595 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
597 int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3);
599 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
600 const void *val, int bytes);
601 int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
602 gpa_t addr, unsigned long *ret);
603 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
605 extern bool tdp_enabled;
607 enum emulation_result {
608 EMULATE_DONE, /* no further processing */
609 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
610 EMULATE_FAIL, /* can't emulate this instruction */
613 #define EMULTYPE_NO_DECODE (1 << 0)
614 #define EMULTYPE_TRAP_UD (1 << 1)
615 #define EMULTYPE_SKIP (1 << 2)
616 int emulate_instruction(struct kvm_vcpu *vcpu,
617 unsigned long cr2, u16 error_code, int emulation_type);
618 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
619 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
621 void kvm_enable_efer_bits(u64);
622 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
623 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
625 struct x86_emulate_ctxt;
627 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port);
628 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
629 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
630 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
631 int emulate_clts(struct kvm_vcpu *vcpu);
632 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu);
634 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
635 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg);
637 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason,
638 bool has_error_code, u32 error_code);
640 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
641 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
642 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
643 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
644 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val);
645 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val);
646 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
647 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
648 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
649 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr);
651 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
652 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
654 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu);
655 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags);
657 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
658 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
659 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr);
660 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
661 void kvm_inject_page_fault(struct kvm_vcpu *vcpu);
662 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
663 gfn_t gfn, void *data, int offset, int len,
665 void kvm_propagate_fault(struct kvm_vcpu *vcpu);
666 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
668 int kvm_pic_set_irq(void *opaque, int irq, int level);
670 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
672 int fx_init(struct kvm_vcpu *vcpu);
674 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
675 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
676 const u8 *new, int bytes,
677 bool guest_initiated);
678 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
679 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
680 int kvm_mmu_load(struct kvm_vcpu *vcpu);
681 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
682 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
683 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
684 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
685 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
686 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
688 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
690 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
692 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
693 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
695 void kvm_enable_tdp(void);
696 void kvm_disable_tdp(void);
698 int complete_pio(struct kvm_vcpu *vcpu);
699 bool kvm_check_iopl(struct kvm_vcpu *vcpu);
701 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
703 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
705 return (struct kvm_mmu_page *)page_private(page);
708 static inline u16 kvm_read_ldt(void)
711 asm("sldt %0" : "=g"(ldt));
715 static inline void kvm_load_ldt(u16 sel)
717 asm("lldt %0" : : "rm"(sel));
721 static inline unsigned long read_msr(unsigned long msr)
730 static inline u32 get_rdx_init_val(void)
732 return 0x600; /* P6 family */
735 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
737 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
740 #define TSS_IOPB_BASE_OFFSET 0x66
741 #define TSS_BASE_SIZE 0x68
742 #define TSS_IOPB_SIZE (65536 / 8)
743 #define TSS_REDIRECTION_SIZE (256 / 8)
744 #define RMODE_TSS_SIZE \
745 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
748 TASK_SWITCH_CALL = 0,
749 TASK_SWITCH_IRET = 1,
751 TASK_SWITCH_GATE = 3,
754 #define HF_GIF_MASK (1 << 0)
755 #define HF_HIF_MASK (1 << 1)
756 #define HF_VINTR_MASK (1 << 2)
757 #define HF_NMI_MASK (1 << 3)
758 #define HF_IRET_MASK (1 << 4)
761 * Hardware virtualization extension instructions may fault if a
762 * reboot turns off virtualization while processes are running.
763 * Trap the fault and ignore the instruction if that happens.
765 asmlinkage void kvm_handle_fault_on_reboot(void);
767 #define __kvm_handle_fault_on_reboot(insn) \
768 "666: " insn "\n\t" \
769 ".pushsection .fixup, \"ax\" \n" \
771 __ASM_SIZE(push) " $666b \n\t" \
772 "jmp kvm_handle_fault_on_reboot \n\t" \
774 ".pushsection __ex_table, \"a\" \n\t" \
775 _ASM_PTR " 666b, 667b \n\t" \
778 #define KVM_ARCH_WANT_MMU_NOTIFIER
779 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
780 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
781 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
782 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu);
783 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
784 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
785 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
787 void kvm_define_shared_msr(unsigned index, u32 msr);
788 void kvm_set_shared_msr(unsigned index, u64 val, u64 mask);
790 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip);
792 #endif /* _ASM_X86_KVM_HOST_H */