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 64
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 INVALID_PAGE (~(hpa_t)0)
42 #define UNMAPPED_GVA (~(gpa_t)0)
44 /* KVM Hugepage definitions for x86 */
45 #define KVM_NR_PAGE_SIZES 3
46 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + (((x) - 1) * 9))
47 #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x))
48 #define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1))
49 #define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE)
67 #define SELECTOR_TI_MASK (1 << 2)
68 #define SELECTOR_RPL_MASK 0x03
72 #define KVM_ALIAS_SLOTS 4
74 #define KVM_PERMILLE_MMU_PAGES 20
75 #define KVM_MIN_ALLOC_MMU_PAGES 64
76 #define KVM_MMU_HASH_SHIFT 10
77 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
78 #define KVM_MIN_FREE_MMU_PAGES 5
79 #define KVM_REFILL_PAGES 25
80 #define KVM_MAX_CPUID_ENTRIES 40
81 #define KVM_NR_FIXED_MTRR_REGION 88
82 #define KVM_NR_VAR_MTRR 8
84 extern spinlock_t kvm_lock
;
85 extern struct list_head vm_list
;
114 VCPU_EXREG_PDPTR
= NR_VCPU_REGS
,
128 #include <asm/kvm_emulate.h>
130 #define KVM_NR_MEM_OBJS 40
132 #define KVM_NR_DB_REGS 4
134 #define DR6_BD (1 << 13)
135 #define DR6_BS (1 << 14)
136 #define DR6_FIXED_1 0xffff0ff0
137 #define DR6_VOLATILE 0x0000e00f
139 #define DR7_BP_EN_MASK 0x000000ff
140 #define DR7_GE (1 << 9)
141 #define DR7_GD (1 << 13)
142 #define DR7_FIXED_1 0x00000400
143 #define DR7_VOLATILE 0xffff23ff
146 * We don't want allocation failures within the mmu code, so we preallocate
147 * enough memory for a single page fault in a cache.
149 struct kvm_mmu_memory_cache
{
151 void *objects
[KVM_NR_MEM_OBJS
];
154 #define NR_PTE_CHAIN_ENTRIES 5
156 struct kvm_pte_chain
{
157 u64
*parent_ptes
[NR_PTE_CHAIN_ENTRIES
];
158 struct hlist_node link
;
162 * kvm_mmu_page_role, below, is defined as:
164 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
165 * bits 4:7 - page table level for this shadow (1-4)
166 * bits 8:9 - page table quadrant for 2-level guests
167 * bit 16 - direct mapping of virtual to physical mapping at gfn
168 * used for real mode and two-dimensional paging
169 * bits 17:19 - common access permissions for all ptes in this shadow page
171 union kvm_mmu_page_role
{
177 unsigned pad_for_nice_hex_output
:6;
186 struct kvm_mmu_page
{
187 struct list_head link
;
188 struct hlist_node hash_link
;
190 struct list_head oos_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 int multimapped
; /* More than one parent_pte? */
208 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
{
238 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
239 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
243 void (*new_cr3
)(struct kvm_vcpu
*vcpu
);
244 int (*page_fault
)(struct kvm_vcpu
*vcpu
, gva_t gva
, u32 err
);
245 void (*free
)(struct kvm_vcpu
*vcpu
);
246 gpa_t (*gva_to_gpa
)(struct kvm_vcpu
*vcpu
, gva_t gva
);
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
);
251 void (*invlpg
)(struct kvm_vcpu
*vcpu
, gva_t gva
);
254 int shadow_root_level
;
255 union kvm_mmu_page_role base_role
;
258 u64 rsvd_bits_mask
[2][4];
261 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 /* only needed in kvm_pv_mmu_op() path, but it's hot so
291 * put it here to avoid allocation */
292 struct kvm_pv_mmu_op_buffer mmu_op_buffer
;
294 struct kvm_mmu_memory_cache mmu_pte_chain_cache
;
295 struct kvm_mmu_memory_cache mmu_rmap_desc_cache
;
296 struct kvm_mmu_memory_cache mmu_page_cache
;
297 struct kvm_mmu_memory_cache mmu_page_header_cache
;
299 gfn_t last_pt_write_gfn
;
300 int last_pt_write_count
;
301 u64
*last_pte_updated
;
305 gfn_t gfn
; /* presumed gfn during guest pte update */
306 pfn_t pfn
; /* pfn corresponding to that gfn */
307 unsigned long mmu_seq
;
310 struct i387_fxsave_struct host_fx_image
;
311 struct i387_fxsave_struct guest_fx_image
;
313 gva_t mmio_fault_cr2
;
314 struct kvm_pio_request pio
;
317 u8 event_exit_inst_len
;
319 struct kvm_queued_exception
{
326 struct kvm_queued_interrupt
{
332 int halt_request
; /* real mode on Intel only */
335 struct kvm_cpuid_entry2 cpuid_entries
[KVM_MAX_CPUID_ENTRIES
];
336 /* emulate context */
338 struct x86_emulate_ctxt emulate_ctxt
;
341 struct pvclock_vcpu_time_info hv_clock
;
342 unsigned int hv_clock_tsc_khz
;
343 unsigned int time_offset
;
344 struct page
*time_page
;
349 struct mtrr_state_type mtrr_state
;
353 unsigned long db
[KVM_NR_DB_REGS
];
356 unsigned long eff_db
[KVM_NR_DB_REGS
];
363 /* used for guest single stepping over the given code position */
365 unsigned long singlestep_rip
;
368 struct kvm_mem_alias
{
370 unsigned long npages
;
372 #define KVM_ALIAS_INVALID 1UL
376 #define KVM_ARCH_HAS_UNALIAS_INSTANTIATION
378 struct kvm_mem_aliases
{
379 struct kvm_mem_alias aliases
[KVM_ALIAS_SLOTS
];
384 struct kvm_mem_aliases
*aliases
;
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 iommu_domain
*iommu_domain
;
397 struct kvm_pic
*vpic
;
398 struct kvm_ioapic
*vioapic
;
399 struct kvm_pit
*vpit
;
400 int vapics_in_nmi_mode
;
402 unsigned int tss_addr
;
403 struct page
*apic_access_page
;
407 struct page
*ept_identity_pagetable
;
408 bool ept_identity_pagetable_done
;
409 gpa_t ept_identity_map_addr
;
411 unsigned long irq_sources_bitmap
;
415 struct kvm_xen_hvm_config xen_hvm_config
;
419 u32 mmu_shadow_zapped
;
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
;
447 u32 host_state_reload
;
451 u32 insn_emulation_fail
;
457 struct descriptor_table
{
460 } __attribute__((packed
));
463 int (*cpu_has_kvm_support
)(void); /* __init */
464 int (*disabled_by_bios
)(void); /* __init */
465 int (*hardware_enable
)(void *dummy
);
466 void (*hardware_disable
)(void *dummy
);
467 void (*check_processor_compatibility
)(void *rtn
);
468 int (*hardware_setup
)(void); /* __init */
469 void (*hardware_unsetup
)(void); /* __exit */
470 bool (*cpu_has_accelerated_tpr
)(void);
471 void (*cpuid_update
)(struct kvm_vcpu
*vcpu
);
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 void (*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_cr0_guest_bits
)(struct kvm_vcpu
*vcpu
);
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
);
513 int (*handle_exit
)(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 bool (*get_nmi_mask
)(struct kvm_vcpu
*vcpu
);
526 void (*set_nmi_mask
)(struct kvm_vcpu
*vcpu
, bool masked
);
527 void (*enable_nmi_window
)(struct kvm_vcpu
*vcpu
);
528 void (*enable_irq_window
)(struct kvm_vcpu
*vcpu
);
529 void (*update_cr8_intercept
)(struct kvm_vcpu
*vcpu
, int tpr
, int irr
);
530 int (*set_tss_addr
)(struct kvm
*kvm
, unsigned int addr
);
531 int (*get_tdp_level
)(void);
532 u64 (*get_mt_mask
)(struct kvm_vcpu
*vcpu
, gfn_t gfn
, bool is_mmio
);
533 int (*get_lpage_level
)(void);
534 bool (*rdtscp_supported
)(void);
536 const struct trace_print_flags
*exit_reasons_str
;
539 extern struct kvm_x86_ops
*kvm_x86_ops
;
541 int kvm_mmu_module_init(void);
542 void kvm_mmu_module_exit(void);
544 void kvm_mmu_destroy(struct kvm_vcpu
*vcpu
);
545 int kvm_mmu_create(struct kvm_vcpu
*vcpu
);
546 int kvm_mmu_setup(struct kvm_vcpu
*vcpu
);
547 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte
, u64 notrap_pte
);
548 void kvm_mmu_set_base_ptes(u64 base_pte
);
549 void kvm_mmu_set_mask_ptes(u64 user_mask
, u64 accessed_mask
,
550 u64 dirty_mask
, u64 nx_mask
, u64 x_mask
);
552 int kvm_mmu_reset_context(struct kvm_vcpu
*vcpu
);
553 void kvm_mmu_slot_remove_write_access(struct kvm
*kvm
, int slot
);
554 void kvm_mmu_zap_all(struct kvm
*kvm
);
555 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm
*kvm
);
556 void kvm_mmu_change_mmu_pages(struct kvm
*kvm
, unsigned int kvm_nr_mmu_pages
);
558 int load_pdptrs(struct kvm_vcpu
*vcpu
, unsigned long cr3
);
560 int emulator_write_phys(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
561 const void *val
, int bytes
);
562 int kvm_pv_mmu_op(struct kvm_vcpu
*vcpu
, unsigned long bytes
,
563 gpa_t addr
, unsigned long *ret
);
564 u8
kvm_get_guest_memory_type(struct kvm_vcpu
*vcpu
, gfn_t gfn
);
566 extern bool tdp_enabled
;
568 enum emulation_result
{
569 EMULATE_DONE
, /* no further processing */
570 EMULATE_DO_MMIO
, /* kvm_run filled with mmio request */
571 EMULATE_FAIL
, /* can't emulate this instruction */
574 #define EMULTYPE_NO_DECODE (1 << 0)
575 #define EMULTYPE_TRAP_UD (1 << 1)
576 #define EMULTYPE_SKIP (1 << 2)
577 int emulate_instruction(struct kvm_vcpu
*vcpu
,
578 unsigned long cr2
, u16 error_code
, int emulation_type
);
579 void kvm_report_emulation_failure(struct kvm_vcpu
*cvpu
, const char *context
);
580 void realmode_lgdt(struct kvm_vcpu
*vcpu
, u16 size
, unsigned long address
);
581 void realmode_lidt(struct kvm_vcpu
*vcpu
, u16 size
, unsigned long address
);
582 void realmode_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
,
583 unsigned long *rflags
);
585 unsigned long realmode_get_cr(struct kvm_vcpu
*vcpu
, int cr
);
586 void realmode_set_cr(struct kvm_vcpu
*vcpu
, int cr
, unsigned long value
,
587 unsigned long *rflags
);
588 void kvm_enable_efer_bits(u64
);
589 int kvm_get_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64
*data
);
590 int kvm_set_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64 data
);
592 struct x86_emulate_ctxt
;
594 int kvm_emulate_pio(struct kvm_vcpu
*vcpu
, int in
,
595 int size
, unsigned port
);
596 int kvm_emulate_pio_string(struct kvm_vcpu
*vcpu
, int in
,
597 int size
, unsigned long count
, int down
,
598 gva_t address
, int rep
, unsigned port
);
599 void kvm_emulate_cpuid(struct kvm_vcpu
*vcpu
);
600 int kvm_emulate_halt(struct kvm_vcpu
*vcpu
);
601 int emulate_invlpg(struct kvm_vcpu
*vcpu
, gva_t address
);
602 int emulate_clts(struct kvm_vcpu
*vcpu
);
603 int emulator_get_dr(struct x86_emulate_ctxt
*ctxt
, int dr
,
604 unsigned long *dest
);
605 int emulator_set_dr(struct x86_emulate_ctxt
*ctxt
, int dr
,
606 unsigned long value
);
608 void kvm_get_segment(struct kvm_vcpu
*vcpu
, struct kvm_segment
*var
, int seg
);
609 int kvm_load_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
610 int type_bits
, int seg
);
612 int kvm_task_switch(struct kvm_vcpu
*vcpu
, u16 tss_selector
, int reason
);
614 void kvm_set_cr0(struct kvm_vcpu
*vcpu
, unsigned long cr0
);
615 void kvm_set_cr3(struct kvm_vcpu
*vcpu
, unsigned long cr3
);
616 void kvm_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
);
617 void kvm_set_cr8(struct kvm_vcpu
*vcpu
, unsigned long cr8
);
618 unsigned long kvm_get_cr8(struct kvm_vcpu
*vcpu
);
619 void kvm_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
);
620 void kvm_get_cs_db_l_bits(struct kvm_vcpu
*vcpu
, int *db
, int *l
);
622 int kvm_get_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
);
623 int kvm_set_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
);
625 unsigned long kvm_get_rflags(struct kvm_vcpu
*vcpu
);
626 void kvm_set_rflags(struct kvm_vcpu
*vcpu
, unsigned long rflags
);
628 void kvm_queue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
);
629 void kvm_queue_exception_e(struct kvm_vcpu
*vcpu
, unsigned nr
, u32 error_code
);
630 void kvm_inject_page_fault(struct kvm_vcpu
*vcpu
, unsigned long cr2
,
632 bool kvm_require_cpl(struct kvm_vcpu
*vcpu
, int required_cpl
);
634 int kvm_pic_set_irq(void *opaque
, int irq
, int level
);
636 void kvm_inject_nmi(struct kvm_vcpu
*vcpu
);
638 void fx_init(struct kvm_vcpu
*vcpu
);
640 int emulator_write_emulated(unsigned long addr
,
643 struct kvm_vcpu
*vcpu
);
645 unsigned long segment_base(u16 selector
);
647 void kvm_mmu_flush_tlb(struct kvm_vcpu
*vcpu
);
648 void kvm_mmu_pte_write(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
649 const u8
*new, int bytes
,
650 bool guest_initiated
);
651 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu
*vcpu
, gva_t gva
);
652 void __kvm_mmu_free_some_pages(struct kvm_vcpu
*vcpu
);
653 int kvm_mmu_load(struct kvm_vcpu
*vcpu
);
654 void kvm_mmu_unload(struct kvm_vcpu
*vcpu
);
655 void kvm_mmu_sync_roots(struct kvm_vcpu
*vcpu
);
657 int kvm_emulate_hypercall(struct kvm_vcpu
*vcpu
);
659 int kvm_fix_hypercall(struct kvm_vcpu
*vcpu
);
661 int kvm_mmu_page_fault(struct kvm_vcpu
*vcpu
, gva_t gva
, u32 error_code
);
662 void kvm_mmu_invlpg(struct kvm_vcpu
*vcpu
, gva_t gva
);
664 void kvm_enable_tdp(void);
665 void kvm_disable_tdp(void);
667 int load_pdptrs(struct kvm_vcpu
*vcpu
, unsigned long cr3
);
668 int complete_pio(struct kvm_vcpu
*vcpu
);
670 struct kvm_memory_slot
*gfn_to_memslot_unaliased(struct kvm
*kvm
, gfn_t gfn
);
672 static inline struct kvm_mmu_page
*page_header(hpa_t shadow_page
)
674 struct page
*page
= pfn_to_page(shadow_page
>> PAGE_SHIFT
);
676 return (struct kvm_mmu_page
*)page_private(page
);
679 static inline u16
kvm_read_fs(void)
682 asm("mov %%fs, %0" : "=g"(seg
));
686 static inline u16
kvm_read_gs(void)
689 asm("mov %%gs, %0" : "=g"(seg
));
693 static inline u16
kvm_read_ldt(void)
696 asm("sldt %0" : "=g"(ldt
));
700 static inline void kvm_load_fs(u16 sel
)
702 asm("mov %0, %%fs" : : "rm"(sel
));
705 static inline void kvm_load_gs(u16 sel
)
707 asm("mov %0, %%gs" : : "rm"(sel
));
710 static inline void kvm_load_ldt(u16 sel
)
712 asm("lldt %0" : : "rm"(sel
));
715 static inline void kvm_get_idt(struct descriptor_table
*table
)
717 asm("sidt %0" : "=m"(*table
));
720 static inline void kvm_get_gdt(struct descriptor_table
*table
)
722 asm("sgdt %0" : "=m"(*table
));
725 static inline unsigned long kvm_read_tr_base(void)
728 asm("str %0" : "=g"(tr
));
729 return segment_base(tr
);
733 static inline unsigned long read_msr(unsigned long msr
)
742 static inline void kvm_fx_save(struct i387_fxsave_struct
*image
)
744 asm("fxsave (%0)":: "r" (image
));
747 static inline void kvm_fx_restore(struct i387_fxsave_struct
*image
)
749 asm("fxrstor (%0)":: "r" (image
));
752 static inline void kvm_fx_finit(void)
757 static inline u32
get_rdx_init_val(void)
759 return 0x600; /* P6 family */
762 static inline void kvm_inject_gp(struct kvm_vcpu
*vcpu
, u32 error_code
)
764 kvm_queue_exception_e(vcpu
, GP_VECTOR
, error_code
);
767 #define TSS_IOPB_BASE_OFFSET 0x66
768 #define TSS_BASE_SIZE 0x68
769 #define TSS_IOPB_SIZE (65536 / 8)
770 #define TSS_REDIRECTION_SIZE (256 / 8)
771 #define RMODE_TSS_SIZE \
772 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
775 TASK_SWITCH_CALL
= 0,
776 TASK_SWITCH_IRET
= 1,
778 TASK_SWITCH_GATE
= 3,
781 #define HF_GIF_MASK (1 << 0)
782 #define HF_HIF_MASK (1 << 1)
783 #define HF_VINTR_MASK (1 << 2)
784 #define HF_NMI_MASK (1 << 3)
785 #define HF_IRET_MASK (1 << 4)
788 * Hardware virtualization extension instructions may fault if a
789 * reboot turns off virtualization while processes are running.
790 * Trap the fault and ignore the instruction if that happens.
792 asmlinkage
void kvm_handle_fault_on_reboot(void);
794 #define __kvm_handle_fault_on_reboot(insn) \
795 "666: " insn "\n\t" \
796 ".pushsection .fixup, \"ax\" \n" \
798 __ASM_SIZE(push) " $666b \n\t" \
799 "jmp kvm_handle_fault_on_reboot \n\t" \
801 ".pushsection __ex_table, \"a\" \n\t" \
802 _ASM_PTR " 666b, 667b \n\t" \
805 #define KVM_ARCH_WANT_MMU_NOTIFIER
806 int kvm_unmap_hva(struct kvm
*kvm
, unsigned long hva
);
807 int kvm_age_hva(struct kvm
*kvm
, unsigned long hva
);
808 void kvm_set_spte_hva(struct kvm
*kvm
, unsigned long hva
, pte_t pte
);
809 int cpuid_maxphyaddr(struct kvm_vcpu
*vcpu
);
810 int kvm_cpu_has_interrupt(struct kvm_vcpu
*vcpu
);
811 int kvm_arch_interrupt_allowed(struct kvm_vcpu
*vcpu
);
812 int kvm_cpu_get_interrupt(struct kvm_vcpu
*v
);
814 void kvm_define_shared_msr(unsigned index
, u32 msr
);
815 void kvm_set_shared_msr(unsigned index
, u64 val
, u64 mask
);
817 #endif /* _ASM_X86_KVM_HOST_H */