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_PERMILLE_MMU_PAGES 20
44 #define KVM_MIN_ALLOC_MMU_PAGES 64
45 #define KVM_NUM_MMU_PAGES 1024
46 #define KVM_MIN_FREE_MMU_PAGES 5
47 #define KVM_REFILL_PAGES 25
48 #define KVM_MAX_CPUID_ENTRIES 40
60 #define SELECTOR_TI_MASK (1 << 2)
61 #define SELECTOR_RPL_MASK 0x03
65 #define KVM_PIO_PAGE_OFFSET 1
68 * vcpu->requests bit members
70 #define KVM_REQ_TLB_FLUSH 0
75 * gva - guest virtual address
76 * gpa - guest physical address
77 * gfn - guest frame number
78 * hva - host virtual address
79 * hpa - host physical address
80 * hfn - host frame number
83 typedef unsigned long gva_t;
85 typedef unsigned long gfn_t;
87 typedef unsigned long hva_t;
89 typedef unsigned long hfn_t;
91 #define NR_PTE_CHAIN_ENTRIES 5
93 struct kvm_pte_chain {
94 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
95 struct hlist_node link;
99 * kvm_mmu_page_role, below, is defined as:
101 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
102 * bits 4:7 - page table level for this shadow (1-4)
103 * bits 8:9 - page table quadrant for 2-level guests
104 * bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
105 * bits 17:19 - "access" - the user, writable, and nx bits of a huge page pde
107 union kvm_mmu_page_role {
110 unsigned glevels : 4;
112 unsigned quadrant : 2;
113 unsigned pad_for_nice_hex_output : 6;
114 unsigned metaphysical : 1;
115 unsigned hugepage_access : 3;
119 struct kvm_mmu_page {
120 struct list_head link;
121 struct hlist_node hash_link;
124 * The following two entries are used to key the shadow page in the
128 union kvm_mmu_page_role role;
131 /* hold the gfn of each spte inside spt */
133 unsigned long slot_bitmap; /* One bit set per slot which has memory
134 * in this shadow page.
136 int multimapped; /* More than one parent_pte? */
137 int root_count; /* Currently serving as active root */
139 u64 *parent_pte; /* !multimapped */
140 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
145 extern struct kmem_cache *kvm_vcpu_cache;
148 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
149 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
153 void (*new_cr3)(struct kvm_vcpu *vcpu);
154 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
155 void (*free)(struct kvm_vcpu *vcpu);
156 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
157 void (*prefetch_page)(struct kvm_vcpu *vcpu,
158 struct kvm_mmu_page *page);
161 int shadow_root_level;
166 #define KVM_NR_MEM_OBJS 40
168 struct kvm_mmu_memory_cache {
170 void *objects[KVM_NR_MEM_OBJS];
174 * We don't want allocation failures within the mmu code, so we preallocate
175 * enough memory for a single page fault in a cache.
177 struct kvm_guest_debug {
216 #include "x86_emulate.h"
218 struct kvm_pio_request {
221 struct page *guest_pages[2];
222 unsigned guest_page_offset;
241 u32 irq_window_exits;
244 u32 request_irq_exits;
250 struct kvm_io_device {
251 void (*read)(struct kvm_io_device *this,
255 void (*write)(struct kvm_io_device *this,
259 int (*in_range)(struct kvm_io_device *this, gpa_t addr);
260 void (*destructor)(struct kvm_io_device *this);
265 static inline void kvm_iodevice_read(struct kvm_io_device *dev,
270 dev->read(dev, addr, len, val);
273 static inline void kvm_iodevice_write(struct kvm_io_device *dev,
278 dev->write(dev, addr, len, val);
281 static inline int kvm_iodevice_inrange(struct kvm_io_device *dev, gpa_t addr)
283 return dev->in_range(dev, addr);
286 static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
289 dev->destructor(dev);
293 * It would be nice to use something smarter than a linear search, TBD...
294 * Thankfully we dont expect many devices to register (famous last words :),
295 * so until then it will suffice. At least its abstracted so we can change
300 #define NR_IOBUS_DEVS 6
301 struct kvm_io_device *devs[NR_IOBUS_DEVS];
304 void kvm_io_bus_init(struct kvm_io_bus *bus);
305 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
306 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
307 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
308 struct kvm_io_device *dev);
312 struct preempt_notifier preempt_notifier;
318 int interrupt_window_open;
320 unsigned long requests;
321 unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
322 DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
323 unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
324 unsigned long rip; /* needs vcpu_load_rsp_rip() */
331 u64 pdptrs[4]; /* pae */
334 struct kvm_lapic *apic; /* kernel irqchip context */
335 #define VCPU_MP_STATE_RUNNABLE 0
336 #define VCPU_MP_STATE_UNINITIALIZED 1
337 #define VCPU_MP_STATE_INIT_RECEIVED 2
338 #define VCPU_MP_STATE_SIPI_RECEIVED 3
339 #define VCPU_MP_STATE_HALTED 4
342 u64 ia32_misc_enable_msr;
346 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
347 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
348 struct kvm_mmu_memory_cache mmu_page_cache;
349 struct kvm_mmu_memory_cache mmu_page_header_cache;
351 gfn_t last_pt_write_gfn;
352 int last_pt_write_count;
353 u64 *last_pte_updated;
355 struct kvm_guest_debug guest_debug;
357 struct i387_fxsave_struct host_fx_image;
358 struct i387_fxsave_struct guest_fx_image;
360 int guest_fpu_loaded;
363 int mmio_read_completed;
366 unsigned char mmio_data[8];
367 gpa_t mmio_phys_addr;
368 gva_t mmio_fault_cr2;
369 struct kvm_pio_request pio;
371 wait_queue_head_t wq;
376 struct kvm_stat stat;
381 struct kvm_save_segment {
386 } tr, es, ds, fs, gs;
388 int halt_request; /* real mode on Intel only */
391 struct kvm_cpuid_entry cpuid_entries[KVM_MAX_CPUID_ENTRIES];
393 /* emulate context */
395 struct x86_emulate_ctxt emulate_ctxt;
398 struct kvm_mem_alias {
400 unsigned long npages;
404 struct kvm_memory_slot {
406 unsigned long npages;
408 struct page **phys_mem;
410 unsigned long *dirty_bitmap;
411 int user_alloc; /* user allocated memory */
412 unsigned long userspace_addr;
416 struct mutex lock; /* protects everything except vcpus */
418 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
420 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS];
422 * Hash table of struct kvm_mmu_page.
424 struct list_head active_mmu_pages;
425 unsigned int n_free_mmu_pages;
426 unsigned int n_requested_mmu_pages;
427 unsigned int n_alloc_mmu_pages;
428 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
429 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
430 unsigned long rmap_overflow;
431 struct list_head vm_list;
433 struct kvm_io_bus mmio_bus;
434 struct kvm_io_bus pio_bus;
435 struct kvm_pic *vpic;
436 struct kvm_ioapic *vioapic;
437 int round_robin_prev_vcpu;
440 static inline struct kvm_pic *pic_irqchip(struct kvm *kvm)
445 static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)
450 static inline int irqchip_in_kernel(struct kvm *kvm)
452 return pic_irqchip(kvm) != 0;
455 struct descriptor_table {
458 } __attribute__((packed));
461 int (*cpu_has_kvm_support)(void); /* __init */
462 int (*disabled_by_bios)(void); /* __init */
463 void (*hardware_enable)(void *dummy); /* __init */
464 void (*hardware_disable)(void *dummy);
465 void (*check_processor_compatibility)(void *rtn);
466 int (*hardware_setup)(void); /* __init */
467 void (*hardware_unsetup)(void); /* __exit */
469 /* Create, but do not attach this VCPU */
470 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
471 void (*vcpu_free)(struct kvm_vcpu *vcpu);
472 void (*vcpu_reset)(struct kvm_vcpu *vcpu);
474 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
475 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
476 void (*vcpu_put)(struct kvm_vcpu *vcpu);
477 void (*vcpu_decache)(struct kvm_vcpu *vcpu);
479 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
480 struct kvm_debug_guest *dbg);
481 void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
482 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
483 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
484 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
485 void (*get_segment)(struct kvm_vcpu *vcpu,
486 struct kvm_segment *var, int seg);
487 void (*set_segment)(struct kvm_vcpu *vcpu,
488 struct kvm_segment *var, int seg);
489 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
490 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
491 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
492 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
493 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
494 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
495 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
496 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
497 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
498 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
499 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
500 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
502 void (*cache_regs)(struct kvm_vcpu *vcpu);
503 void (*decache_regs)(struct kvm_vcpu *vcpu);
504 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
505 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
507 void (*tlb_flush)(struct kvm_vcpu *vcpu);
508 void (*inject_page_fault)(struct kvm_vcpu *vcpu,
509 unsigned long addr, u32 err_code);
511 void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);
513 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
514 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
515 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
516 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
517 unsigned char *hypercall_addr);
518 int (*get_irq)(struct kvm_vcpu *vcpu);
519 void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
520 void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
521 void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
522 struct kvm_run *run);
525 extern struct kvm_x86_ops *kvm_x86_ops;
527 /* The guest did something we don't support. */
528 #define pr_unimpl(vcpu, fmt, ...) \
530 if (printk_ratelimit()) \
531 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
532 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
535 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
536 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
538 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
539 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
541 void vcpu_load(struct kvm_vcpu *vcpu);
542 void vcpu_put(struct kvm_vcpu *vcpu);
545 int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size,
546 struct module *module);
547 void kvm_exit_x86(void);
549 int kvm_mmu_module_init(void);
550 void kvm_mmu_module_exit(void);
552 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
553 int kvm_mmu_create(struct kvm_vcpu *vcpu);
554 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
555 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
557 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
558 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
559 void kvm_mmu_zap_all(struct kvm *kvm);
560 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
562 hpa_t gpa_to_hpa(struct kvm *kvm, gpa_t gpa);
563 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
564 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
565 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
566 hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);
567 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
569 extern struct page *bad_page;
571 int is_error_page(struct page *page);
572 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
573 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
574 void kvm_release_page(struct page *page);
575 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
577 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
578 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
579 int offset, int len);
580 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
582 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
583 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
584 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
585 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
587 enum emulation_result {
588 EMULATE_DONE, /* no further processing */
589 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
590 EMULATE_FAIL, /* can't emulate this instruction */
593 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
594 unsigned long cr2, u16 error_code, int no_decode);
595 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
596 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
597 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
598 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
599 unsigned long *rflags);
601 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
602 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
603 unsigned long *rflags);
604 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
605 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
607 struct x86_emulate_ctxt;
609 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
610 int size, unsigned port);
611 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
612 int size, unsigned long count, int down,
613 gva_t address, int rep, unsigned port);
614 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
615 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
616 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
617 int emulate_clts(struct kvm_vcpu *vcpu);
618 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
619 unsigned long *dest);
620 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
621 unsigned long value);
623 void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
624 void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
625 void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
626 void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
627 unsigned long get_cr8(struct kvm_vcpu *vcpu);
628 void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
629 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
631 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
632 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
634 void fx_init(struct kvm_vcpu *vcpu);
636 void kvm_resched(struct kvm_vcpu *vcpu);
637 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
638 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
639 void kvm_flush_remote_tlbs(struct kvm *kvm);
641 int emulator_read_std(unsigned long addr,
644 struct kvm_vcpu *vcpu);
645 int emulator_write_emulated(unsigned long addr,
648 struct kvm_vcpu *vcpu);
650 unsigned long segment_base(u16 selector);
652 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
653 const u8 *new, int bytes);
654 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
655 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
656 int kvm_mmu_load(struct kvm_vcpu *vcpu);
657 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
659 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
661 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
663 long kvm_arch_dev_ioctl(struct file *filp,
664 unsigned int ioctl, unsigned long arg);
665 long kvm_arch_vcpu_ioctl(struct file *filp,
666 unsigned int ioctl, unsigned long arg);
667 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
668 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
670 __init void kvm_arch_init(void);
672 static inline void kvm_guest_enter(void)
674 current->flags |= PF_VCPU;
677 static inline void kvm_guest_exit(void)
679 current->flags &= ~PF_VCPU;
682 static inline int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
685 return vcpu->mmu.page_fault(vcpu, gva, error_code);
688 static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
690 if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
691 __kvm_mmu_free_some_pages(vcpu);
694 static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
696 if (likely(vcpu->mmu.root_hpa != INVALID_PAGE))
699 return kvm_mmu_load(vcpu);
702 static inline int is_long_mode(struct kvm_vcpu *vcpu)
705 return vcpu->shadow_efer & EFER_LME;
711 static inline int is_pae(struct kvm_vcpu *vcpu)
713 return vcpu->cr4 & X86_CR4_PAE;
716 static inline int is_pse(struct kvm_vcpu *vcpu)
718 return vcpu->cr4 & X86_CR4_PSE;
721 static inline int is_paging(struct kvm_vcpu *vcpu)
723 return vcpu->cr0 & X86_CR0_PG;
726 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
728 return slot - kvm->memslots;
731 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
733 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
735 return (struct kvm_mmu_page *)page_private(page);
738 static inline u16 read_fs(void)
741 asm("mov %%fs, %0" : "=g"(seg));
745 static inline u16 read_gs(void)
748 asm("mov %%gs, %0" : "=g"(seg));
752 static inline u16 read_ldt(void)
755 asm("sldt %0" : "=g"(ldt));
759 static inline void load_fs(u16 sel)
761 asm("mov %0, %%fs" : : "rm"(sel));
764 static inline void load_gs(u16 sel)
766 asm("mov %0, %%gs" : : "rm"(sel));
770 static inline void load_ldt(u16 sel)
772 asm("lldt %0" : : "rm"(sel));
776 static inline void get_idt(struct descriptor_table *table)
778 asm("sidt %0" : "=m"(*table));
781 static inline void get_gdt(struct descriptor_table *table)
783 asm("sgdt %0" : "=m"(*table));
786 static inline unsigned long read_tr_base(void)
789 asm("str %0" : "=g"(tr));
790 return segment_base(tr);
794 static inline unsigned long read_msr(unsigned long msr)
803 static inline void fx_save(struct i387_fxsave_struct *image)
805 asm("fxsave (%0)":: "r" (image));
808 static inline void fx_restore(struct i387_fxsave_struct *image)
810 asm("fxrstor (%0)":: "r" (image));
813 static inline void fpu_init(void)
818 static inline u32 get_rdx_init_val(void)
820 return 0x600; /* P6 family */
823 #define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
824 #define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
825 #define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
826 #define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
827 #define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
828 #define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
829 #define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
830 #define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
831 #define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
833 #define MSR_IA32_TIME_STAMP_COUNTER 0x010
835 #define TSS_IOPB_BASE_OFFSET 0x66
836 #define TSS_BASE_SIZE 0x68
837 #define TSS_IOPB_SIZE (65536 / 8)
838 #define TSS_REDIRECTION_SIZE (256 / 8)
839 #define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)