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 int (*page_fault
)(struct kvm_vcpu
*vcpu
, gva_t gva
, u32 err
);
240 void (*free
)(struct kvm_vcpu
*vcpu
);
241 gpa_t (*gva_to_gpa
)(struct kvm_vcpu
*vcpu
, gva_t gva
, u32 access
,
243 void (*prefetch_page
)(struct kvm_vcpu
*vcpu
,
244 struct kvm_mmu_page
*page
);
245 int (*sync_page
)(struct kvm_vcpu
*vcpu
,
246 struct kvm_mmu_page
*sp
, bool clear_unsync
);
247 void (*invlpg
)(struct kvm_vcpu
*vcpu
, gva_t gva
);
250 int shadow_root_level
;
251 union kvm_mmu_page_role base_role
;
254 u64 rsvd_bits_mask
[2][4];
257 struct kvm_vcpu_arch
{
260 * rip and regs accesses must go through
261 * kvm_{register,rip}_{read,write} functions.
263 unsigned long regs
[NR_VCPU_REGS
];
268 unsigned long cr0_guest_owned_bits
;
272 unsigned long cr4_guest_owned_bits
;
275 u64 pdptrs
[4]; /* pae */
278 struct kvm_lapic
*apic
; /* kernel irqchip context */
279 int32_t apic_arb_prio
;
282 u64 ia32_misc_enable_msr
;
283 bool tpr_access_reporting
;
286 /* only needed in kvm_pv_mmu_op() path, but it's hot so
287 * put it here to avoid allocation */
288 struct kvm_pv_mmu_op_buffer mmu_op_buffer
;
290 struct kvm_mmu_memory_cache mmu_pte_chain_cache
;
291 struct kvm_mmu_memory_cache mmu_rmap_desc_cache
;
292 struct kvm_mmu_memory_cache mmu_page_cache
;
293 struct kvm_mmu_memory_cache mmu_page_header_cache
;
295 gfn_t last_pt_write_gfn
;
296 int last_pt_write_count
;
297 u64
*last_pte_updated
;
301 gfn_t gfn
; /* presumed gfn during guest pte update */
302 pfn_t pfn
; /* pfn corresponding to that gfn */
303 unsigned long mmu_seq
;
306 struct fpu guest_fpu
;
309 gva_t mmio_fault_cr2
;
310 struct kvm_pio_request pio
;
313 u8 event_exit_inst_len
;
315 struct kvm_queued_exception
{
323 struct kvm_queued_interrupt
{
329 int halt_request
; /* real mode on Intel only */
332 struct kvm_cpuid_entry2 cpuid_entries
[KVM_MAX_CPUID_ENTRIES
];
333 /* emulate context */
335 struct x86_emulate_ctxt emulate_ctxt
;
338 struct pvclock_vcpu_time_info hv_clock
;
339 unsigned int hv_clock_tsc_khz
;
340 unsigned int time_offset
;
341 struct page
*time_page
;
346 struct mtrr_state_type mtrr_state
;
350 unsigned long db
[KVM_NR_DB_REGS
];
353 unsigned long eff_db
[KVM_NR_DB_REGS
];
360 /* used for guest single stepping over the given code position */
361 unsigned long singlestep_rip
;
363 /* fields used by HYPER-V emulation */
366 cpumask_var_t wbinvd_dirty_mask
;
370 unsigned int n_free_mmu_pages
;
371 unsigned int n_requested_mmu_pages
;
372 unsigned int n_alloc_mmu_pages
;
373 atomic_t invlpg_counter
;
374 struct hlist_head mmu_page_hash
[KVM_NUM_MMU_PAGES
];
376 * Hash table of struct kvm_mmu_page.
378 struct list_head active_mmu_pages
;
379 struct list_head assigned_dev_head
;
380 struct iommu_domain
*iommu_domain
;
382 struct kvm_pic
*vpic
;
383 struct kvm_ioapic
*vioapic
;
384 struct kvm_pit
*vpit
;
385 int vapics_in_nmi_mode
;
387 unsigned int tss_addr
;
388 struct page
*apic_access_page
;
392 struct page
*ept_identity_pagetable
;
393 bool ept_identity_pagetable_done
;
394 gpa_t ept_identity_map_addr
;
396 unsigned long irq_sources_bitmap
;
400 struct kvm_xen_hvm_config xen_hvm_config
;
402 /* fields used by HYPER-V emulation */
408 u32 mmu_shadow_zapped
;
416 u32 remote_tlb_flush
;
420 struct kvm_vcpu_stat
{
430 u32 irq_window_exits
;
431 u32 nmi_window_exits
;
434 u32 request_irq_exits
;
436 u32 host_state_reload
;
440 u32 insn_emulation_fail
;
447 int (*cpu_has_kvm_support
)(void); /* __init */
448 int (*disabled_by_bios
)(void); /* __init */
449 int (*hardware_enable
)(void *dummy
);
450 void (*hardware_disable
)(void *dummy
);
451 void (*check_processor_compatibility
)(void *rtn
);
452 int (*hardware_setup
)(void); /* __init */
453 void (*hardware_unsetup
)(void); /* __exit */
454 bool (*cpu_has_accelerated_tpr
)(void);
455 void (*cpuid_update
)(struct kvm_vcpu
*vcpu
);
457 /* Create, but do not attach this VCPU */
458 struct kvm_vcpu
*(*vcpu_create
)(struct kvm
*kvm
, unsigned id
);
459 void (*vcpu_free
)(struct kvm_vcpu
*vcpu
);
460 int (*vcpu_reset
)(struct kvm_vcpu
*vcpu
);
462 void (*prepare_guest_switch
)(struct kvm_vcpu
*vcpu
);
463 void (*vcpu_load
)(struct kvm_vcpu
*vcpu
, int cpu
);
464 void (*vcpu_put
)(struct kvm_vcpu
*vcpu
);
466 void (*set_guest_debug
)(struct kvm_vcpu
*vcpu
,
467 struct kvm_guest_debug
*dbg
);
468 int (*get_msr
)(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64
*pdata
);
469 int (*set_msr
)(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64 data
);
470 u64 (*get_segment_base
)(struct kvm_vcpu
*vcpu
, int seg
);
471 void (*get_segment
)(struct kvm_vcpu
*vcpu
,
472 struct kvm_segment
*var
, int seg
);
473 int (*get_cpl
)(struct kvm_vcpu
*vcpu
);
474 void (*set_segment
)(struct kvm_vcpu
*vcpu
,
475 struct kvm_segment
*var
, int seg
);
476 void (*get_cs_db_l_bits
)(struct kvm_vcpu
*vcpu
, int *db
, int *l
);
477 void (*decache_cr0_guest_bits
)(struct kvm_vcpu
*vcpu
);
478 void (*decache_cr4_guest_bits
)(struct kvm_vcpu
*vcpu
);
479 void (*set_cr0
)(struct kvm_vcpu
*vcpu
, unsigned long cr0
);
480 void (*set_cr3
)(struct kvm_vcpu
*vcpu
, unsigned long cr3
);
481 void (*set_cr4
)(struct kvm_vcpu
*vcpu
, unsigned long cr4
);
482 void (*set_efer
)(struct kvm_vcpu
*vcpu
, u64 efer
);
483 void (*get_idt
)(struct kvm_vcpu
*vcpu
, struct desc_ptr
*dt
);
484 void (*set_idt
)(struct kvm_vcpu
*vcpu
, struct desc_ptr
*dt
);
485 void (*get_gdt
)(struct kvm_vcpu
*vcpu
, struct desc_ptr
*dt
);
486 void (*set_gdt
)(struct kvm_vcpu
*vcpu
, struct desc_ptr
*dt
);
487 void (*set_dr7
)(struct kvm_vcpu
*vcpu
, unsigned long value
);
488 void (*cache_reg
)(struct kvm_vcpu
*vcpu
, enum kvm_reg reg
);
489 unsigned long (*get_rflags
)(struct kvm_vcpu
*vcpu
);
490 void (*set_rflags
)(struct kvm_vcpu
*vcpu
, unsigned long rflags
);
491 void (*fpu_activate
)(struct kvm_vcpu
*vcpu
);
492 void (*fpu_deactivate
)(struct kvm_vcpu
*vcpu
);
494 void (*tlb_flush
)(struct kvm_vcpu
*vcpu
);
496 void (*run
)(struct kvm_vcpu
*vcpu
);
497 int (*handle_exit
)(struct kvm_vcpu
*vcpu
);
498 void (*skip_emulated_instruction
)(struct kvm_vcpu
*vcpu
);
499 void (*set_interrupt_shadow
)(struct kvm_vcpu
*vcpu
, int mask
);
500 u32 (*get_interrupt_shadow
)(struct kvm_vcpu
*vcpu
, int mask
);
501 void (*patch_hypercall
)(struct kvm_vcpu
*vcpu
,
502 unsigned char *hypercall_addr
);
503 void (*set_irq
)(struct kvm_vcpu
*vcpu
);
504 void (*set_nmi
)(struct kvm_vcpu
*vcpu
);
505 void (*queue_exception
)(struct kvm_vcpu
*vcpu
, unsigned nr
,
506 bool has_error_code
, u32 error_code
,
508 int (*interrupt_allowed
)(struct kvm_vcpu
*vcpu
);
509 int (*nmi_allowed
)(struct kvm_vcpu
*vcpu
);
510 bool (*get_nmi_mask
)(struct kvm_vcpu
*vcpu
);
511 void (*set_nmi_mask
)(struct kvm_vcpu
*vcpu
, bool masked
);
512 void (*enable_nmi_window
)(struct kvm_vcpu
*vcpu
);
513 void (*enable_irq_window
)(struct kvm_vcpu
*vcpu
);
514 void (*update_cr8_intercept
)(struct kvm_vcpu
*vcpu
, int tpr
, int irr
);
515 int (*set_tss_addr
)(struct kvm
*kvm
, unsigned int addr
);
516 int (*get_tdp_level
)(void);
517 u64 (*get_mt_mask
)(struct kvm_vcpu
*vcpu
, gfn_t gfn
, bool is_mmio
);
518 int (*get_lpage_level
)(void);
519 bool (*rdtscp_supported
)(void);
521 void (*set_supported_cpuid
)(u32 func
, struct kvm_cpuid_entry2
*entry
);
523 bool (*has_wbinvd_exit
)(void);
525 const struct trace_print_flags
*exit_reasons_str
;
528 extern struct kvm_x86_ops
*kvm_x86_ops
;
530 int kvm_mmu_module_init(void);
531 void kvm_mmu_module_exit(void);
533 void kvm_mmu_destroy(struct kvm_vcpu
*vcpu
);
534 int kvm_mmu_create(struct kvm_vcpu
*vcpu
);
535 int kvm_mmu_setup(struct kvm_vcpu
*vcpu
);
536 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte
, u64 notrap_pte
);
537 void kvm_mmu_set_base_ptes(u64 base_pte
);
538 void kvm_mmu_set_mask_ptes(u64 user_mask
, u64 accessed_mask
,
539 u64 dirty_mask
, u64 nx_mask
, u64 x_mask
);
541 int kvm_mmu_reset_context(struct kvm_vcpu
*vcpu
);
542 void kvm_mmu_slot_remove_write_access(struct kvm
*kvm
, int slot
);
543 void kvm_mmu_zap_all(struct kvm
*kvm
);
544 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm
*kvm
);
545 void kvm_mmu_change_mmu_pages(struct kvm
*kvm
, unsigned int kvm_nr_mmu_pages
);
547 int load_pdptrs(struct kvm_vcpu
*vcpu
, unsigned long cr3
);
549 int emulator_write_phys(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
550 const void *val
, int bytes
);
551 int kvm_pv_mmu_op(struct kvm_vcpu
*vcpu
, unsigned long bytes
,
552 gpa_t addr
, unsigned long *ret
);
553 u8
kvm_get_guest_memory_type(struct kvm_vcpu
*vcpu
, gfn_t gfn
);
555 extern bool tdp_enabled
;
557 enum emulation_result
{
558 EMULATE_DONE
, /* no further processing */
559 EMULATE_DO_MMIO
, /* kvm_run filled with mmio request */
560 EMULATE_FAIL
, /* can't emulate this instruction */
563 #define EMULTYPE_NO_DECODE (1 << 0)
564 #define EMULTYPE_TRAP_UD (1 << 1)
565 #define EMULTYPE_SKIP (1 << 2)
566 int emulate_instruction(struct kvm_vcpu
*vcpu
,
567 unsigned long cr2
, u16 error_code
, int emulation_type
);
568 void realmode_lgdt(struct kvm_vcpu
*vcpu
, u16 size
, unsigned long address
);
569 void realmode_lidt(struct kvm_vcpu
*vcpu
, u16 size
, unsigned long address
);
571 void kvm_enable_efer_bits(u64
);
572 int kvm_get_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64
*data
);
573 int kvm_set_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64 data
);
575 struct x86_emulate_ctxt
;
577 int kvm_fast_pio_out(struct kvm_vcpu
*vcpu
, int size
, unsigned short port
);
578 void kvm_emulate_cpuid(struct kvm_vcpu
*vcpu
);
579 int kvm_emulate_halt(struct kvm_vcpu
*vcpu
);
580 int emulate_invlpg(struct kvm_vcpu
*vcpu
, gva_t address
);
581 int emulate_clts(struct kvm_vcpu
*vcpu
);
582 int kvm_emulate_wbinvd(struct kvm_vcpu
*vcpu
);
584 void kvm_get_segment(struct kvm_vcpu
*vcpu
, struct kvm_segment
*var
, int seg
);
585 int kvm_load_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
, int seg
);
587 int kvm_task_switch(struct kvm_vcpu
*vcpu
, u16 tss_selector
, int reason
,
588 bool has_error_code
, u32 error_code
);
590 int kvm_set_cr0(struct kvm_vcpu
*vcpu
, unsigned long cr0
);
591 int kvm_set_cr3(struct kvm_vcpu
*vcpu
, unsigned long cr3
);
592 int kvm_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
);
593 void kvm_set_cr8(struct kvm_vcpu
*vcpu
, unsigned long cr8
);
594 int kvm_set_dr(struct kvm_vcpu
*vcpu
, int dr
, unsigned long val
);
595 int kvm_get_dr(struct kvm_vcpu
*vcpu
, int dr
, unsigned long *val
);
596 unsigned long kvm_get_cr8(struct kvm_vcpu
*vcpu
);
597 void kvm_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
);
598 void kvm_get_cs_db_l_bits(struct kvm_vcpu
*vcpu
, int *db
, int *l
);
599 int kvm_set_xcr(struct kvm_vcpu
*vcpu
, u32 index
, u64 xcr
);
601 int kvm_get_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
);
602 int kvm_set_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
);
604 unsigned long kvm_get_rflags(struct kvm_vcpu
*vcpu
);
605 void kvm_set_rflags(struct kvm_vcpu
*vcpu
, unsigned long rflags
);
607 void kvm_queue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
);
608 void kvm_queue_exception_e(struct kvm_vcpu
*vcpu
, unsigned nr
, u32 error_code
);
609 void kvm_requeue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
);
610 void kvm_requeue_exception_e(struct kvm_vcpu
*vcpu
, unsigned nr
, u32 error_code
);
611 void kvm_inject_page_fault(struct kvm_vcpu
*vcpu
, unsigned long cr2
,
613 bool kvm_require_cpl(struct kvm_vcpu
*vcpu
, int required_cpl
);
615 int kvm_pic_set_irq(void *opaque
, int irq
, int level
);
617 void kvm_inject_nmi(struct kvm_vcpu
*vcpu
);
619 int fx_init(struct kvm_vcpu
*vcpu
);
621 void kvm_mmu_flush_tlb(struct kvm_vcpu
*vcpu
);
622 void kvm_mmu_pte_write(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
623 const u8
*new, int bytes
,
624 bool guest_initiated
);
625 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu
*vcpu
, gva_t gva
);
626 void __kvm_mmu_free_some_pages(struct kvm_vcpu
*vcpu
);
627 int kvm_mmu_load(struct kvm_vcpu
*vcpu
);
628 void kvm_mmu_unload(struct kvm_vcpu
*vcpu
);
629 void kvm_mmu_sync_roots(struct kvm_vcpu
*vcpu
);
630 gpa_t
kvm_mmu_gva_to_gpa_read(struct kvm_vcpu
*vcpu
, gva_t gva
, u32
*error
);
631 gpa_t
kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu
*vcpu
, gva_t gva
, u32
*error
);
632 gpa_t
kvm_mmu_gva_to_gpa_write(struct kvm_vcpu
*vcpu
, gva_t gva
, u32
*error
);
633 gpa_t
kvm_mmu_gva_to_gpa_system(struct kvm_vcpu
*vcpu
, gva_t gva
, u32
*error
);
635 int kvm_emulate_hypercall(struct kvm_vcpu
*vcpu
);
637 int kvm_fix_hypercall(struct kvm_vcpu
*vcpu
);
639 int kvm_mmu_page_fault(struct kvm_vcpu
*vcpu
, gva_t gva
, u32 error_code
);
640 void kvm_mmu_invlpg(struct kvm_vcpu
*vcpu
, gva_t gva
);
642 void kvm_enable_tdp(void);
643 void kvm_disable_tdp(void);
645 int complete_pio(struct kvm_vcpu
*vcpu
);
646 bool kvm_check_iopl(struct kvm_vcpu
*vcpu
);
648 static inline struct kvm_mmu_page
*page_header(hpa_t shadow_page
)
650 struct page
*page
= pfn_to_page(shadow_page
>> PAGE_SHIFT
);
652 return (struct kvm_mmu_page
*)page_private(page
);
655 static inline u16
kvm_read_fs(void)
658 asm("mov %%fs, %0" : "=g"(seg
));
662 static inline u16
kvm_read_gs(void)
665 asm("mov %%gs, %0" : "=g"(seg
));
669 static inline u16
kvm_read_ldt(void)
672 asm("sldt %0" : "=g"(ldt
));
676 static inline void kvm_load_fs(u16 sel
)
678 asm("mov %0, %%fs" : : "rm"(sel
));
681 static inline void kvm_load_gs(u16 sel
)
683 asm("mov %0, %%gs" : : "rm"(sel
));
686 static inline void kvm_load_ldt(u16 sel
)
688 asm("lldt %0" : : "rm"(sel
));
692 static inline unsigned long read_msr(unsigned long msr
)
701 static inline u32
get_rdx_init_val(void)
703 return 0x600; /* P6 family */
706 static inline void kvm_inject_gp(struct kvm_vcpu
*vcpu
, u32 error_code
)
708 kvm_queue_exception_e(vcpu
, GP_VECTOR
, error_code
);
711 #define TSS_IOPB_BASE_OFFSET 0x66
712 #define TSS_BASE_SIZE 0x68
713 #define TSS_IOPB_SIZE (65536 / 8)
714 #define TSS_REDIRECTION_SIZE (256 / 8)
715 #define RMODE_TSS_SIZE \
716 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
719 TASK_SWITCH_CALL
= 0,
720 TASK_SWITCH_IRET
= 1,
722 TASK_SWITCH_GATE
= 3,
725 #define HF_GIF_MASK (1 << 0)
726 #define HF_HIF_MASK (1 << 1)
727 #define HF_VINTR_MASK (1 << 2)
728 #define HF_NMI_MASK (1 << 3)
729 #define HF_IRET_MASK (1 << 4)
732 * Hardware virtualization extension instructions may fault if a
733 * reboot turns off virtualization while processes are running.
734 * Trap the fault and ignore the instruction if that happens.
736 asmlinkage
void kvm_handle_fault_on_reboot(void);
738 #define __kvm_handle_fault_on_reboot(insn) \
739 "666: " insn "\n\t" \
740 ".pushsection .fixup, \"ax\" \n" \
742 __ASM_SIZE(push) " $666b \n\t" \
743 "jmp kvm_handle_fault_on_reboot \n\t" \
745 ".pushsection __ex_table, \"a\" \n\t" \
746 _ASM_PTR " 666b, 667b \n\t" \
749 #define KVM_ARCH_WANT_MMU_NOTIFIER
750 int kvm_unmap_hva(struct kvm
*kvm
, unsigned long hva
);
751 int kvm_age_hva(struct kvm
*kvm
, unsigned long hva
);
752 void kvm_set_spte_hva(struct kvm
*kvm
, unsigned long hva
, pte_t pte
);
753 int cpuid_maxphyaddr(struct kvm_vcpu
*vcpu
);
754 int kvm_cpu_has_interrupt(struct kvm_vcpu
*vcpu
);
755 int kvm_arch_interrupt_allowed(struct kvm_vcpu
*vcpu
);
756 int kvm_cpu_get_interrupt(struct kvm_vcpu
*v
);
758 void kvm_define_shared_msr(unsigned index
, u32 msr
);
759 void kvm_set_shared_msr(unsigned index
, u64 val
, u64 mask
);
761 bool kvm_is_linear_rip(struct kvm_vcpu
*vcpu
, unsigned long linear_rip
);
763 #endif /* _ASM_X86_KVM_HOST_H */