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>
19 #include <linux/kvm.h>
20 #include <linux/kvm_para.h>
21 #include <linux/kvm_types.h>
23 #include <asm/pvclock-abi.h>
26 #include <asm/msr-index.h>
28 #define KVM_MAX_VCPUS 16
29 #define KVM_MEMORY_SLOTS 32
30 /* memory slots that does not exposed to userspace */
31 #define KVM_PRIVATE_MEM_SLOTS 4
33 #define KVM_PIO_PAGE_OFFSET 1
34 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
36 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
37 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
38 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \
39 0xFFFFFF0000000000ULL)
41 #define KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST \
42 (X86_CR0_WP | X86_CR0_NE | X86_CR0_NW | X86_CR0_CD)
43 #define KVM_GUEST_CR0_MASK \
44 (KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE)
45 #define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST \
46 (X86_CR0_WP | X86_CR0_NE | X86_CR0_TS | X86_CR0_MP)
47 #define KVM_VM_CR0_ALWAYS_ON \
48 (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE)
49 #define KVM_GUEST_CR4_MASK \
50 (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
51 #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
52 #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
54 #define INVALID_PAGE (~(hpa_t)0)
55 #define UNMAPPED_GVA (~(gpa_t)0)
57 /* KVM Hugepage definitions for x86 */
58 #define KVM_NR_PAGE_SIZES 3
59 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + (((x) - 1) * 9))
60 #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x))
61 #define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1))
62 #define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE)
80 #define SELECTOR_TI_MASK (1 << 2)
81 #define SELECTOR_RPL_MASK 0x03
85 #define KVM_ALIAS_SLOTS 4
87 #define KVM_PERMILLE_MMU_PAGES 20
88 #define KVM_MIN_ALLOC_MMU_PAGES 64
89 #define KVM_MMU_HASH_SHIFT 10
90 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
91 #define KVM_MIN_FREE_MMU_PAGES 5
92 #define KVM_REFILL_PAGES 25
93 #define KVM_MAX_CPUID_ENTRIES 40
94 #define KVM_NR_FIXED_MTRR_REGION 88
95 #define KVM_NR_VAR_MTRR 8
97 extern spinlock_t kvm_lock;
98 extern struct list_head vm_list;
127 VCPU_EXREG_PDPTR = NR_VCPU_REGS,
141 #include <asm/kvm_emulate.h>
143 #define KVM_NR_MEM_OBJS 40
145 #define KVM_NR_DB_REGS 4
147 #define DR6_BD (1 << 13)
148 #define DR6_BS (1 << 14)
149 #define DR6_FIXED_1 0xffff0ff0
150 #define DR6_VOLATILE 0x0000e00f
152 #define DR7_BP_EN_MASK 0x000000ff
153 #define DR7_GE (1 << 9)
154 #define DR7_GD (1 << 13)
155 #define DR7_FIXED_1 0x00000400
156 #define DR7_VOLATILE 0xffff23ff
159 * We don't want allocation failures within the mmu code, so we preallocate
160 * enough memory for a single page fault in a cache.
162 struct kvm_mmu_memory_cache {
164 void *objects[KVM_NR_MEM_OBJS];
167 #define NR_PTE_CHAIN_ENTRIES 5
169 struct kvm_pte_chain {
170 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
171 struct hlist_node link;
175 * kvm_mmu_page_role, below, is defined as:
177 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
178 * bits 4:7 - page table level for this shadow (1-4)
179 * bits 8:9 - page table quadrant for 2-level guests
180 * bit 16 - direct mapping of virtual to physical mapping at gfn
181 * used for real mode and two-dimensional paging
182 * bits 17:19 - common access permissions for all ptes in this shadow page
184 union kvm_mmu_page_role {
190 unsigned pad_for_nice_hex_output:6;
200 struct kvm_mmu_page {
201 struct list_head link;
202 struct hlist_node hash_link;
204 struct list_head oos_link;
207 * The following two entries are used to key the shadow page in the
211 union kvm_mmu_page_role role;
214 /* hold the gfn of each spte inside spt */
217 * One bit set per slot which has memory
218 * in this shadow page.
220 DECLARE_BITMAP(slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS);
221 int multimapped; /* More than one parent_pte? */
222 int root_count; /* Currently serving as active root */
224 unsigned int unsync_children;
226 u64 *parent_pte; /* !multimapped */
227 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
229 DECLARE_BITMAP(unsync_child_bitmap, 512);
232 struct kvm_pv_mmu_op_buffer {
236 char buf[512] __aligned(sizeof(long));
239 struct kvm_pio_request {
252 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
253 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
257 void (*new_cr3)(struct kvm_vcpu *vcpu);
258 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
259 void (*free)(struct kvm_vcpu *vcpu);
260 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access,
262 void (*prefetch_page)(struct kvm_vcpu *vcpu,
263 struct kvm_mmu_page *page);
264 int (*sync_page)(struct kvm_vcpu *vcpu,
265 struct kvm_mmu_page *sp);
266 void (*invlpg)(struct kvm_vcpu *vcpu, gva_t gva);
269 int shadow_root_level;
270 union kvm_mmu_page_role base_role;
273 u64 rsvd_bits_mask[2][4];
276 struct kvm_vcpu_arch {
279 * rip and regs accesses must go through
280 * kvm_{register,rip}_{read,write} functions.
282 unsigned long regs[NR_VCPU_REGS];
292 u64 pdptrs[4]; /* pae */
295 struct kvm_lapic *apic; /* kernel irqchip context */
296 int32_t apic_arb_prio;
299 u64 ia32_misc_enable_msr;
300 bool tpr_access_reporting;
303 /* only needed in kvm_pv_mmu_op() path, but it's hot so
304 * put it here to avoid allocation */
305 struct kvm_pv_mmu_op_buffer mmu_op_buffer;
307 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
308 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
309 struct kvm_mmu_memory_cache mmu_page_cache;
310 struct kvm_mmu_memory_cache mmu_page_header_cache;
312 gfn_t last_pt_write_gfn;
313 int last_pt_write_count;
314 u64 *last_pte_updated;
318 gfn_t gfn; /* presumed gfn during guest pte update */
319 pfn_t pfn; /* pfn corresponding to that gfn */
320 unsigned long mmu_seq;
323 struct i387_fxsave_struct host_fx_image;
324 struct i387_fxsave_struct guest_fx_image;
326 gva_t mmio_fault_cr2;
327 struct kvm_pio_request pio;
330 u8 event_exit_inst_len;
332 struct kvm_queued_exception {
339 struct kvm_queued_interrupt {
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;
359 bool singlestep; /* guest is single stepped by KVM */
363 struct mtrr_state_type mtrr_state;
367 unsigned long db[KVM_NR_DB_REGS];
370 unsigned long eff_db[KVM_NR_DB_REGS];
378 struct kvm_mem_alias {
380 unsigned long npages;
386 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
388 unsigned int n_free_mmu_pages;
389 unsigned int n_requested_mmu_pages;
390 unsigned int n_alloc_mmu_pages;
391 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
393 * Hash table of struct kvm_mmu_page.
395 struct list_head active_mmu_pages;
396 struct list_head assigned_dev_head;
397 struct iommu_domain *iommu_domain;
399 struct kvm_pic *vpic;
400 struct kvm_ioapic *vioapic;
401 struct kvm_pit *vpit;
402 struct hlist_head irq_ack_notifier_list;
403 int vapics_in_nmi_mode;
405 unsigned int tss_addr;
406 struct page *apic_access_page;
410 struct page *ept_identity_pagetable;
411 bool ept_identity_pagetable_done;
412 gpa_t ept_identity_map_addr;
414 unsigned long irq_sources_bitmap;
415 unsigned long irq_states[KVM_IOAPIC_NUM_PINS];
421 u32 mmu_shadow_zapped;
429 u32 remote_tlb_flush;
433 struct kvm_vcpu_stat {
443 u32 irq_window_exits;
444 u32 nmi_window_exits;
447 u32 request_irq_exits;
449 u32 host_state_reload;
453 u32 insn_emulation_fail;
459 struct descriptor_table {
462 } __attribute__((packed));
465 int (*cpu_has_kvm_support)(void); /* __init */
466 int (*disabled_by_bios)(void); /* __init */
467 void (*hardware_enable)(void *dummy); /* __init */
468 void (*hardware_disable)(void *dummy);
469 void (*check_processor_compatibility)(void *rtn);
470 int (*hardware_setup)(void); /* __init */
471 void (*hardware_unsetup)(void); /* __exit */
472 bool (*cpu_has_accelerated_tpr)(void);
474 /* Create, but do not attach this VCPU */
475 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
476 void (*vcpu_free)(struct kvm_vcpu *vcpu);
477 int (*vcpu_reset)(struct kvm_vcpu *vcpu);
479 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
480 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
481 void (*vcpu_put)(struct kvm_vcpu *vcpu);
483 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
484 struct kvm_guest_debug *dbg);
485 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
486 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
487 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
488 void (*get_segment)(struct kvm_vcpu *vcpu,
489 struct kvm_segment *var, int seg);
490 int (*get_cpl)(struct kvm_vcpu *vcpu);
491 void (*set_segment)(struct kvm_vcpu *vcpu,
492 struct kvm_segment *var, int seg);
493 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
494 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
495 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
496 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
497 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
498 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
499 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
500 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
501 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
502 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
503 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
504 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
506 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
507 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
508 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
510 void (*tlb_flush)(struct kvm_vcpu *vcpu);
512 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
513 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
514 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
515 void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
516 u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
517 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
518 unsigned char *hypercall_addr);
519 void (*set_irq)(struct kvm_vcpu *vcpu);
520 void (*set_nmi)(struct kvm_vcpu *vcpu);
521 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
522 bool has_error_code, u32 error_code);
523 int (*interrupt_allowed)(struct kvm_vcpu *vcpu);
524 int (*nmi_allowed)(struct kvm_vcpu *vcpu);
525 void (*enable_nmi_window)(struct kvm_vcpu *vcpu);
526 void (*enable_irq_window)(struct kvm_vcpu *vcpu);
527 void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr);
528 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
529 int (*get_tdp_level)(void);
530 u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio);
531 bool (*gb_page_enable)(void);
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, struct kvm_run *run,
575 unsigned long cr2, u16 error_code, int emulation_type);
576 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
577 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
578 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
579 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
580 unsigned long *rflags);
582 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
583 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
584 unsigned long *rflags);
585 void kvm_enable_efer_bits(u64);
586 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
587 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
589 struct x86_emulate_ctxt;
591 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
592 int size, unsigned port);
593 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
594 int size, unsigned long count, int down,
595 gva_t address, int rep, unsigned port);
596 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
597 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
598 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
599 int emulate_clts(struct kvm_vcpu *vcpu);
600 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
601 unsigned long *dest);
602 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
603 unsigned long value);
605 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
606 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg);
608 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
610 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
611 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
612 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
613 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
614 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
615 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
616 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
618 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
619 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
621 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
622 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
623 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
625 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
627 int kvm_pic_set_irq(void *opaque, int irq, int level);
629 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
631 void fx_init(struct kvm_vcpu *vcpu);
633 int emulator_write_emulated(unsigned long addr,
636 struct kvm_vcpu *vcpu);
638 unsigned long segment_base(u16 selector);
640 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
641 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
642 const u8 *new, int bytes,
643 bool guest_initiated);
644 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
645 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
646 int kvm_mmu_load(struct kvm_vcpu *vcpu);
647 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
648 void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
649 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
650 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
651 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
652 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error);
654 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
656 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
658 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
659 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
661 void kvm_enable_tdp(void);
662 void kvm_disable_tdp(void);
664 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
665 int complete_pio(struct kvm_vcpu *vcpu);
666 bool kvm_check_iopl(struct kvm_vcpu *vcpu);
668 struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn);
670 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
672 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
674 return (struct kvm_mmu_page *)page_private(page);
677 static inline u16 kvm_read_ldt(void)
680 asm("sldt %0" : "=g"(ldt));
684 static inline void kvm_load_ldt(u16 sel)
686 asm("lldt %0" : : "rm"(sel));
689 static inline void kvm_get_idt(struct descriptor_table *table)
691 asm("sidt %0" : "=m"(*table));
694 static inline void kvm_get_gdt(struct descriptor_table *table)
696 asm("sgdt %0" : "=m"(*table));
699 static inline unsigned long kvm_read_tr_base(void)
702 asm("str %0" : "=g"(tr));
703 return segment_base(tr);
707 static inline unsigned long read_msr(unsigned long msr)
716 static inline void kvm_fx_save(struct i387_fxsave_struct *image)
718 asm("fxsave (%0)":: "r" (image));
721 static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
723 asm("fxrstor (%0)":: "r" (image));
726 static inline void kvm_fx_finit(void)
731 static inline u32 get_rdx_init_val(void)
733 return 0x600; /* P6 family */
736 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
738 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
741 #define TSS_IOPB_BASE_OFFSET 0x66
742 #define TSS_BASE_SIZE 0x68
743 #define TSS_IOPB_SIZE (65536 / 8)
744 #define TSS_REDIRECTION_SIZE (256 / 8)
745 #define RMODE_TSS_SIZE \
746 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
749 TASK_SWITCH_CALL = 0,
750 TASK_SWITCH_IRET = 1,
752 TASK_SWITCH_GATE = 3,
755 #define HF_GIF_MASK (1 << 0)
756 #define HF_HIF_MASK (1 << 1)
757 #define HF_VINTR_MASK (1 << 2)
758 #define HF_NMI_MASK (1 << 3)
759 #define HF_IRET_MASK (1 << 4)
762 * Hardware virtualization extension instructions may fault if a
763 * reboot turns off virtualization while processes are running.
764 * Trap the fault and ignore the instruction if that happens.
766 asmlinkage void kvm_handle_fault_on_reboot(void);
768 #define __kvm_handle_fault_on_reboot(insn) \
769 "666: " insn "\n\t" \
770 ".pushsection .fixup, \"ax\" \n" \
772 __ASM_SIZE(push) " $666b \n\t" \
773 "jmp kvm_handle_fault_on_reboot \n\t" \
775 ".pushsection __ex_table, \"a\" \n\t" \
776 _ASM_PTR " 666b, 667b \n\t" \
779 #define KVM_ARCH_WANT_MMU_NOTIFIER
780 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
781 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
782 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
783 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu);
784 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
785 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
786 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
788 #endif /* _ASM_X86_KVM_HOST_H */