5 * This work is licensed under the terms of the GNU GPL, version 2. See
6 * the COPYING file in the top-level directory.
9 #include <linux/types.h>
10 #include <linux/list.h>
11 #include <linux/mutex.h>
12 #include <linux/spinlock.h>
13 #include <linux/signal.h>
14 #include <linux/sched.h>
16 #include <linux/preempt.h>
17 #include <asm/signal.h>
19 #include <linux/kvm.h>
20 #include <linux/kvm_para.h>
22 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
23 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
24 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS|0xFFFFFF0000000000ULL)
26 #define KVM_GUEST_CR0_MASK \
27 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
28 | X86_CR0_NW | X86_CR0_CD)
29 #define KVM_VM_CR0_ALWAYS_ON \
30 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
32 #define KVM_GUEST_CR4_MASK \
33 (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
34 #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
35 #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
37 #define INVALID_PAGE (~(hpa_t)0)
38 #define UNMAPPED_GVA (~(gpa_t)0)
40 #define KVM_MAX_VCPUS 4
41 #define KVM_ALIAS_SLOTS 4
42 #define KVM_MEMORY_SLOTS 8
43 #define KVM_NUM_MMU_PAGES 1024
44 #define KVM_MIN_FREE_MMU_PAGES 5
45 #define KVM_REFILL_PAGES 25
46 #define KVM_MAX_CPUID_ENTRIES 40
58 #define SELECTOR_TI_MASK (1 << 2)
59 #define SELECTOR_RPL_MASK 0x03
63 #define KVM_PIO_PAGE_OFFSET 1
66 * vcpu->requests bit members
68 #define KVM_TLB_FLUSH 0
73 * gva - guest virtual address
74 * gpa - guest physical address
75 * gfn - guest frame number
76 * hva - host virtual address
77 * hpa - host physical address
78 * hfn - host frame number
81 typedef unsigned long gva_t
;
83 typedef unsigned long gfn_t
;
85 typedef unsigned long hva_t
;
87 typedef unsigned long hfn_t
;
89 #define NR_PTE_CHAIN_ENTRIES 5
91 struct kvm_pte_chain
{
92 u64
*parent_ptes
[NR_PTE_CHAIN_ENTRIES
];
93 struct hlist_node link
;
97 * kvm_mmu_page_role, below, is defined as:
99 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
100 * bits 4:7 - page table level for this shadow (1-4)
101 * bits 8:9 - page table quadrant for 2-level guests
102 * bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
103 * bits 17:19 - "access" - the user, writable, and nx bits of a huge page pde
105 union kvm_mmu_page_role
{
108 unsigned glevels
: 4;
110 unsigned quadrant
: 2;
111 unsigned pad_for_nice_hex_output
: 6;
112 unsigned metaphysical
: 1;
113 unsigned hugepage_access
: 3;
117 struct kvm_mmu_page
{
118 struct list_head link
;
119 struct hlist_node hash_link
;
122 * The following two entries are used to key the shadow page in the
126 union kvm_mmu_page_role role
;
129 unsigned long slot_bitmap
; /* One bit set per slot which has memory
130 * in this shadow page.
132 int multimapped
; /* More than one parent_pte? */
133 int root_count
; /* Currently serving as active root */
135 u64
*parent_pte
; /* !multimapped */
136 struct hlist_head parent_ptes
; /* multimapped, kvm_pte_chain */
141 extern struct kmem_cache
*kvm_vcpu_cache
;
144 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
145 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
149 void (*new_cr3
)(struct kvm_vcpu
*vcpu
);
150 int (*page_fault
)(struct kvm_vcpu
*vcpu
, gva_t gva
, u32 err
);
151 void (*free
)(struct kvm_vcpu
*vcpu
);
152 gpa_t (*gva_to_gpa
)(struct kvm_vcpu
*vcpu
, gva_t gva
);
153 void (*prefetch_page
)(struct kvm_vcpu
*vcpu
,
154 struct kvm_mmu_page
*page
);
157 int shadow_root_level
;
162 #define KVM_NR_MEM_OBJS 20
164 struct kvm_mmu_memory_cache
{
166 void *objects
[KVM_NR_MEM_OBJS
];
170 * We don't want allocation failures within the mmu code, so we preallocate
171 * enough memory for a single page fault in a cache.
173 struct kvm_guest_debug
{
212 #include "x86_emulate.h"
214 struct kvm_pio_request
{
217 struct page
*guest_pages
[2];
218 unsigned guest_page_offset
;
237 u32 irq_window_exits
;
240 u32 request_irq_exits
;
246 struct kvm_io_device
{
247 void (*read
)(struct kvm_io_device
*this,
251 void (*write
)(struct kvm_io_device
*this,
255 int (*in_range
)(struct kvm_io_device
*this, gpa_t addr
);
256 void (*destructor
)(struct kvm_io_device
*this);
261 static inline void kvm_iodevice_read(struct kvm_io_device
*dev
,
266 dev
->read(dev
, addr
, len
, val
);
269 static inline void kvm_iodevice_write(struct kvm_io_device
*dev
,
274 dev
->write(dev
, addr
, len
, val
);
277 static inline int kvm_iodevice_inrange(struct kvm_io_device
*dev
, gpa_t addr
)
279 return dev
->in_range(dev
, addr
);
282 static inline void kvm_iodevice_destructor(struct kvm_io_device
*dev
)
285 dev
->destructor(dev
);
289 * It would be nice to use something smarter than a linear search, TBD...
290 * Thankfully we dont expect many devices to register (famous last words :),
291 * so until then it will suffice. At least its abstracted so we can change
296 #define NR_IOBUS_DEVS 6
297 struct kvm_io_device
*devs
[NR_IOBUS_DEVS
];
300 void kvm_io_bus_init(struct kvm_io_bus
*bus
);
301 void kvm_io_bus_destroy(struct kvm_io_bus
*bus
);
302 struct kvm_io_device
*kvm_io_bus_find_dev(struct kvm_io_bus
*bus
, gpa_t addr
);
303 void kvm_io_bus_register_dev(struct kvm_io_bus
*bus
,
304 struct kvm_io_device
*dev
);
308 struct preempt_notifier preempt_notifier
;
314 int interrupt_window_open
;
316 unsigned long requests
;
317 unsigned long irq_summary
; /* bit vector: 1 per word in irq_pending */
318 DECLARE_BITMAP(irq_pending
, KVM_NR_INTERRUPTS
);
319 unsigned long regs
[NR_VCPU_REGS
]; /* for rsp: vcpu_load_rsp_rip() */
320 unsigned long rip
; /* needs vcpu_load_rsp_rip() */
327 u64 pdptrs
[4]; /* pae */
330 struct kvm_lapic
*apic
; /* kernel irqchip context */
331 #define VCPU_MP_STATE_RUNNABLE 0
332 #define VCPU_MP_STATE_UNINITIALIZED 1
333 #define VCPU_MP_STATE_INIT_RECEIVED 2
334 #define VCPU_MP_STATE_SIPI_RECEIVED 3
335 #define VCPU_MP_STATE_HALTED 4
338 u64 ia32_misc_enable_msr
;
342 struct kvm_mmu_memory_cache mmu_pte_chain_cache
;
343 struct kvm_mmu_memory_cache mmu_rmap_desc_cache
;
344 struct kvm_mmu_memory_cache mmu_page_cache
;
345 struct kvm_mmu_memory_cache mmu_page_header_cache
;
347 gfn_t last_pt_write_gfn
;
348 int last_pt_write_count
;
349 u64
*last_pte_updated
;
351 struct kvm_guest_debug guest_debug
;
353 struct i387_fxsave_struct host_fx_image
;
354 struct i387_fxsave_struct guest_fx_image
;
356 int guest_fpu_loaded
;
359 int mmio_read_completed
;
362 unsigned char mmio_data
[8];
363 gpa_t mmio_phys_addr
;
364 gva_t mmio_fault_cr2
;
365 struct kvm_pio_request pio
;
367 wait_queue_head_t wq
;
372 struct kvm_stat stat
;
377 struct kvm_save_segment
{
382 } tr
, es
, ds
, fs
, gs
;
384 int halt_request
; /* real mode on Intel only */
387 struct kvm_cpuid_entry cpuid_entries
[KVM_MAX_CPUID_ENTRIES
];
389 /* emulate context */
391 struct x86_emulate_ctxt emulate_ctxt
;
394 struct kvm_mem_alias
{
396 unsigned long npages
;
400 struct kvm_memory_slot
{
402 unsigned long npages
;
404 struct page
**phys_mem
;
405 unsigned long *dirty_bitmap
;
409 struct mutex lock
; /* protects everything except vcpus */
411 struct kvm_mem_alias aliases
[KVM_ALIAS_SLOTS
];
413 struct kvm_memory_slot memslots
[KVM_MEMORY_SLOTS
];
415 * Hash table of struct kvm_mmu_page.
417 struct list_head active_mmu_pages
;
418 int n_free_mmu_pages
;
419 struct hlist_head mmu_page_hash
[KVM_NUM_MMU_PAGES
];
420 struct kvm_vcpu
*vcpus
[KVM_MAX_VCPUS
];
421 unsigned long rmap_overflow
;
422 struct list_head vm_list
;
424 struct kvm_io_bus mmio_bus
;
425 struct kvm_io_bus pio_bus
;
426 struct kvm_pic
*vpic
;
427 struct kvm_ioapic
*vioapic
;
428 int round_robin_prev_vcpu
;
431 static inline struct kvm_pic
*pic_irqchip(struct kvm
*kvm
)
436 static inline struct kvm_ioapic
*ioapic_irqchip(struct kvm
*kvm
)
441 static inline int irqchip_in_kernel(struct kvm
*kvm
)
443 return pic_irqchip(kvm
) != 0;
446 struct descriptor_table
{
449 } __attribute__((packed
));
452 int (*cpu_has_kvm_support
)(void); /* __init */
453 int (*disabled_by_bios
)(void); /* __init */
454 void (*hardware_enable
)(void *dummy
); /* __init */
455 void (*hardware_disable
)(void *dummy
);
456 void (*check_processor_compatibility
)(void *rtn
);
457 int (*hardware_setup
)(void); /* __init */
458 void (*hardware_unsetup
)(void); /* __exit */
460 /* Create, but do not attach this VCPU */
461 struct kvm_vcpu
*(*vcpu_create
)(struct kvm
*kvm
, unsigned id
);
462 void (*vcpu_free
)(struct kvm_vcpu
*vcpu
);
463 void (*vcpu_reset
)(struct kvm_vcpu
*vcpu
);
465 void (*prepare_guest_switch
)(struct kvm_vcpu
*vcpu
);
466 void (*vcpu_load
)(struct kvm_vcpu
*vcpu
, int cpu
);
467 void (*vcpu_put
)(struct kvm_vcpu
*vcpu
);
468 void (*vcpu_decache
)(struct kvm_vcpu
*vcpu
);
470 int (*set_guest_debug
)(struct kvm_vcpu
*vcpu
,
471 struct kvm_debug_guest
*dbg
);
472 void (*guest_debug_pre
)(struct kvm_vcpu
*vcpu
);
473 int (*get_msr
)(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64
*pdata
);
474 int (*set_msr
)(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64 data
);
475 u64 (*get_segment_base
)(struct kvm_vcpu
*vcpu
, int seg
);
476 void (*get_segment
)(struct kvm_vcpu
*vcpu
,
477 struct kvm_segment
*var
, int seg
);
478 void (*set_segment
)(struct kvm_vcpu
*vcpu
,
479 struct kvm_segment
*var
, int seg
);
480 void (*get_cs_db_l_bits
)(struct kvm_vcpu
*vcpu
, int *db
, int *l
);
481 void (*decache_cr4_guest_bits
)(struct kvm_vcpu
*vcpu
);
482 void (*set_cr0
)(struct kvm_vcpu
*vcpu
, unsigned long cr0
);
483 void (*set_cr3
)(struct kvm_vcpu
*vcpu
, unsigned long cr3
);
484 void (*set_cr4
)(struct kvm_vcpu
*vcpu
, unsigned long cr4
);
485 void (*set_efer
)(struct kvm_vcpu
*vcpu
, u64 efer
);
486 void (*get_idt
)(struct kvm_vcpu
*vcpu
, struct descriptor_table
*dt
);
487 void (*set_idt
)(struct kvm_vcpu
*vcpu
, struct descriptor_table
*dt
);
488 void (*get_gdt
)(struct kvm_vcpu
*vcpu
, struct descriptor_table
*dt
);
489 void (*set_gdt
)(struct kvm_vcpu
*vcpu
, struct descriptor_table
*dt
);
490 unsigned long (*get_dr
)(struct kvm_vcpu
*vcpu
, int dr
);
491 void (*set_dr
)(struct kvm_vcpu
*vcpu
, int dr
, unsigned long value
,
493 void (*cache_regs
)(struct kvm_vcpu
*vcpu
);
494 void (*decache_regs
)(struct kvm_vcpu
*vcpu
);
495 unsigned long (*get_rflags
)(struct kvm_vcpu
*vcpu
);
496 void (*set_rflags
)(struct kvm_vcpu
*vcpu
, unsigned long rflags
);
498 void (*tlb_flush
)(struct kvm_vcpu
*vcpu
);
499 void (*inject_page_fault
)(struct kvm_vcpu
*vcpu
,
500 unsigned long addr
, u32 err_code
);
502 void (*inject_gp
)(struct kvm_vcpu
*vcpu
, unsigned err_code
);
504 void (*run
)(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
);
505 int (*handle_exit
)(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
);
506 void (*skip_emulated_instruction
)(struct kvm_vcpu
*vcpu
);
507 void (*patch_hypercall
)(struct kvm_vcpu
*vcpu
,
508 unsigned char *hypercall_addr
);
509 int (*get_irq
)(struct kvm_vcpu
*vcpu
);
510 void (*set_irq
)(struct kvm_vcpu
*vcpu
, int vec
);
511 void (*inject_pending_irq
)(struct kvm_vcpu
*vcpu
);
512 void (*inject_pending_vectors
)(struct kvm_vcpu
*vcpu
,
513 struct kvm_run
*run
);
516 extern struct kvm_x86_ops
*kvm_x86_ops
;
518 /* The guest did something we don't support. */
519 #define pr_unimpl(vcpu, fmt, ...) \
521 if (printk_ratelimit()) \
522 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
523 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
526 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
527 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
529 int kvm_vcpu_init(struct kvm_vcpu
*vcpu
, struct kvm
*kvm
, unsigned id
);
530 void kvm_vcpu_uninit(struct kvm_vcpu
*vcpu
);
532 int kvm_init_x86(struct kvm_x86_ops
*ops
, unsigned int vcpu_size
,
533 struct module
*module
);
534 void kvm_exit_x86(void);
536 int kvm_mmu_module_init(void);
537 void kvm_mmu_module_exit(void);
539 void kvm_mmu_destroy(struct kvm_vcpu
*vcpu
);
540 int kvm_mmu_create(struct kvm_vcpu
*vcpu
);
541 int kvm_mmu_setup(struct kvm_vcpu
*vcpu
);
542 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte
, u64 notrap_pte
);
544 int kvm_mmu_reset_context(struct kvm_vcpu
*vcpu
);
545 void kvm_mmu_slot_remove_write_access(struct kvm
*kvm
, int slot
);
546 void kvm_mmu_zap_all(struct kvm
*kvm
);
548 hpa_t
gpa_to_hpa(struct kvm_vcpu
*vcpu
, gpa_t gpa
);
549 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
550 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
551 static inline int is_error_hpa(hpa_t hpa
) { return hpa
>> HPA_MSB
; }
552 hpa_t
gva_to_hpa(struct kvm_vcpu
*vcpu
, gva_t gva
);
553 struct page
*gva_to_page(struct kvm_vcpu
*vcpu
, gva_t gva
);
555 extern hpa_t bad_page_address
;
557 struct page
*gfn_to_page(struct kvm
*kvm
, gfn_t gfn
);
558 struct kvm_memory_slot
*gfn_to_memslot(struct kvm
*kvm
, gfn_t gfn
);
559 void mark_page_dirty(struct kvm
*kvm
, gfn_t gfn
);
561 enum emulation_result
{
562 EMULATE_DONE
, /* no further processing */
563 EMULATE_DO_MMIO
, /* kvm_run filled with mmio request */
564 EMULATE_FAIL
, /* can't emulate this instruction */
567 int emulate_instruction(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
,
568 unsigned long cr2
, u16 error_code
, int no_decode
);
569 void kvm_report_emulation_failure(struct kvm_vcpu
*cvpu
, const char *context
);
570 void realmode_lgdt(struct kvm_vcpu
*vcpu
, u16 size
, unsigned long address
);
571 void realmode_lidt(struct kvm_vcpu
*vcpu
, u16 size
, unsigned long address
);
572 void realmode_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
,
573 unsigned long *rflags
);
575 unsigned long realmode_get_cr(struct kvm_vcpu
*vcpu
, int cr
);
576 void realmode_set_cr(struct kvm_vcpu
*vcpu
, int cr
, unsigned long value
,
577 unsigned long *rflags
);
578 int kvm_get_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64
*data
);
579 int kvm_set_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64 data
);
581 struct x86_emulate_ctxt
;
583 int kvm_emulate_pio (struct kvm_vcpu
*vcpu
, struct kvm_run
*run
, int in
,
584 int size
, unsigned port
);
585 int kvm_emulate_pio_string(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
, int in
,
586 int size
, unsigned long count
, int down
,
587 gva_t address
, int rep
, unsigned port
);
588 void kvm_emulate_cpuid(struct kvm_vcpu
*vcpu
);
589 int kvm_emulate_halt(struct kvm_vcpu
*vcpu
);
590 int emulate_invlpg(struct kvm_vcpu
*vcpu
, gva_t address
);
591 int emulate_clts(struct kvm_vcpu
*vcpu
);
592 int emulator_get_dr(struct x86_emulate_ctxt
* ctxt
, int dr
,
593 unsigned long *dest
);
594 int emulator_set_dr(struct x86_emulate_ctxt
*ctxt
, int dr
,
595 unsigned long value
);
597 void set_cr0(struct kvm_vcpu
*vcpu
, unsigned long cr0
);
598 void set_cr3(struct kvm_vcpu
*vcpu
, unsigned long cr0
);
599 void set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr0
);
600 void set_cr8(struct kvm_vcpu
*vcpu
, unsigned long cr0
);
601 unsigned long get_cr8(struct kvm_vcpu
*vcpu
);
602 void lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
);
603 void kvm_get_cs_db_l_bits(struct kvm_vcpu
*vcpu
, int *db
, int *l
);
605 int kvm_get_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
);
606 int kvm_set_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
);
608 void fx_init(struct kvm_vcpu
*vcpu
);
610 void kvm_resched(struct kvm_vcpu
*vcpu
);
611 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
);
612 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
);
613 void kvm_flush_remote_tlbs(struct kvm
*kvm
);
615 int emulator_read_std(unsigned long addr
,
618 struct kvm_vcpu
*vcpu
);
619 int emulator_write_emulated(unsigned long addr
,
622 struct kvm_vcpu
*vcpu
);
624 unsigned long segment_base(u16 selector
);
626 void kvm_mmu_pte_write(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
627 const u8
*new, int bytes
);
628 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu
*vcpu
, gva_t gva
);
629 void __kvm_mmu_free_some_pages(struct kvm_vcpu
*vcpu
);
630 int kvm_mmu_load(struct kvm_vcpu
*vcpu
);
631 void kvm_mmu_unload(struct kvm_vcpu
*vcpu
);
633 int kvm_emulate_hypercall(struct kvm_vcpu
*vcpu
);
635 int kvm_fix_hypercall(struct kvm_vcpu
*vcpu
);
637 static inline void kvm_guest_enter(void)
639 current
->flags
|= PF_VCPU
;
642 static inline void kvm_guest_exit(void)
644 current
->flags
&= ~PF_VCPU
;
647 static inline int kvm_mmu_page_fault(struct kvm_vcpu
*vcpu
, gva_t gva
,
650 return vcpu
->mmu
.page_fault(vcpu
, gva
, error_code
);
653 static inline void kvm_mmu_free_some_pages(struct kvm_vcpu
*vcpu
)
655 if (unlikely(vcpu
->kvm
->n_free_mmu_pages
< KVM_MIN_FREE_MMU_PAGES
))
656 __kvm_mmu_free_some_pages(vcpu
);
659 static inline int kvm_mmu_reload(struct kvm_vcpu
*vcpu
)
661 if (likely(vcpu
->mmu
.root_hpa
!= INVALID_PAGE
))
664 return kvm_mmu_load(vcpu
);
667 static inline int is_long_mode(struct kvm_vcpu
*vcpu
)
670 return vcpu
->shadow_efer
& EFER_LME
;
676 static inline int is_pae(struct kvm_vcpu
*vcpu
)
678 return vcpu
->cr4
& X86_CR4_PAE
;
681 static inline int is_pse(struct kvm_vcpu
*vcpu
)
683 return vcpu
->cr4
& X86_CR4_PSE
;
686 static inline int is_paging(struct kvm_vcpu
*vcpu
)
688 return vcpu
->cr0
& X86_CR0_PG
;
691 static inline int memslot_id(struct kvm
*kvm
, struct kvm_memory_slot
*slot
)
693 return slot
- kvm
->memslots
;
696 static inline struct kvm_mmu_page
*page_header(hpa_t shadow_page
)
698 struct page
*page
= pfn_to_page(shadow_page
>> PAGE_SHIFT
);
700 return (struct kvm_mmu_page
*)page_private(page
);
703 static inline u16
read_fs(void)
706 asm ("mov %%fs, %0" : "=g"(seg
));
710 static inline u16
read_gs(void)
713 asm ("mov %%gs, %0" : "=g"(seg
));
717 static inline u16
read_ldt(void)
720 asm ("sldt %0" : "=g"(ldt
));
724 static inline void load_fs(u16 sel
)
726 asm ("mov %0, %%fs" : : "rm"(sel
));
729 static inline void load_gs(u16 sel
)
731 asm ("mov %0, %%gs" : : "rm"(sel
));
735 static inline void load_ldt(u16 sel
)
737 asm ("lldt %0" : : "rm"(sel
));
741 static inline void get_idt(struct descriptor_table
*table
)
743 asm ("sidt %0" : "=m"(*table
));
746 static inline void get_gdt(struct descriptor_table
*table
)
748 asm ("sgdt %0" : "=m"(*table
));
751 static inline unsigned long read_tr_base(void)
754 asm ("str %0" : "=g"(tr
));
755 return segment_base(tr
);
759 static inline unsigned long read_msr(unsigned long msr
)
768 static inline void fx_save(struct i387_fxsave_struct
*image
)
770 asm ("fxsave (%0)":: "r" (image
));
773 static inline void fx_restore(struct i387_fxsave_struct
*image
)
775 asm ("fxrstor (%0)":: "r" (image
));
778 static inline void fpu_init(void)
783 static inline u32
get_rdx_init_val(void)
785 return 0x600; /* P6 family */
788 #define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
789 #define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
790 #define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
791 #define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
792 #define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
793 #define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
794 #define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
795 #define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
796 #define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
798 #define MSR_IA32_TIME_STAMP_COUNTER 0x010
800 #define TSS_IOPB_BASE_OFFSET 0x66
801 #define TSS_BASE_SIZE 0x68
802 #define TSS_IOPB_SIZE (65536 / 8)
803 #define TSS_REDIRECTION_SIZE (256 / 8)
804 #define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)