drivers/kvm/kvm.h

   1 #ifndef __KVM_H
   2 #define __KVM_H
   3
   4 /*
   5  * This work is licensed under the terms of the GNU GPL, version 2.  See
   6  * the COPYING file in the top-level directory.
   7  */
   8
   9 #include <linux/types.h>
  10 #include <linux/list.h>
  11 #include <linux/mutex.h>
  12 #include <linux/spinlock.h>
  13 #include <linux/mm.h>
  14
  15 #include "vmx.h"
  16 #include <linux/kvm.h>
  17 #include <linux/kvm_para.h>
  18
  19 #define CR0_PE_MASK (1ULL << 0)
  20 #define CR0_TS_MASK (1ULL << 3)
  21 #define CR0_NE_MASK (1ULL << 5)
  22 #define CR0_WP_MASK (1ULL << 16)
  23 #define CR0_NW_MASK (1ULL << 29)
  24 #define CR0_CD_MASK (1ULL << 30)
  25 #define CR0_PG_MASK (1ULL << 31)
  26
  27 #define CR3_WPT_MASK (1ULL << 3)
  28 #define CR3_PCD_MASK (1ULL << 4)
  29
  30 #define CR3_RESEVED_BITS 0x07ULL
  31 #define CR3_L_MODE_RESEVED_BITS (~((1ULL << 40) - 1) | 0x0fe7ULL)
  32 #define CR3_FLAGS_MASK ((1ULL << 5) - 1)
  33
  34 #define CR4_VME_MASK (1ULL << 0)
  35 #define CR4_PSE_MASK (1ULL << 4)
  36 #define CR4_PAE_MASK (1ULL << 5)
  37 #define CR4_PGE_MASK (1ULL << 7)
  38 #define CR4_VMXE_MASK (1ULL << 13)
  39
  40 #define KVM_GUEST_CR0_MASK \
  41         (CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK \
  42          | CR0_NW_MASK | CR0_CD_MASK)
  43 #define KVM_VM_CR0_ALWAYS_ON \
  44         (CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK)
  45 #define KVM_GUEST_CR4_MASK \
  46         (CR4_PSE_MASK | CR4_PAE_MASK | CR4_PGE_MASK | CR4_VMXE_MASK | CR4_VME_MASK)
  47 #define KVM_PMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK | CR4_PAE_MASK)
  48 #define KVM_RMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK | CR4_PAE_MASK | CR4_VME_MASK)
  49
  50 #define INVALID_PAGE (~(hpa_t)0)
  51 #define UNMAPPED_GVA (~(gpa_t)0)
  52
  53 #define KVM_MAX_VCPUS 1
  54 #define KVM_MEMORY_SLOTS 4
  55 #define KVM_NUM_MMU_PAGES 256
  56 #define KVM_MIN_FREE_MMU_PAGES 5
  57 #define KVM_REFILL_PAGES 25
  58
  59 #define FX_IMAGE_SIZE 512
  60 #define FX_IMAGE_ALIGN 16
  61 #define FX_BUF_SIZE (2 * FX_IMAGE_SIZE + FX_IMAGE_ALIGN)
  62
  63 #define DE_VECTOR 0
  64 #define DF_VECTOR 8
  65 #define TS_VECTOR 10
  66 #define NP_VECTOR 11
  67 #define SS_VECTOR 12
  68 #define GP_VECTOR 13
  69 #define PF_VECTOR 14
  70
  71 #define SELECTOR_TI_MASK (1 << 2)
  72 #define SELECTOR_RPL_MASK 0x03
  73
  74 #define IOPL_SHIFT 12
  75
  76 /*
  77  * Address types:
  78  *
  79  *  gva - guest virtual address
  80  *  gpa - guest physical address
  81  *  gfn - guest frame number
  82  *  hva - host virtual address
  83  *  hpa - host physical address
  84  *  hfn - host frame number
  85  */
  86
  87 typedef unsigned long  gva_t;
  88 typedef u64            gpa_t;
  89 typedef unsigned long  gfn_t;
  90
  91 typedef unsigned long  hva_t;
  92 typedef u64            hpa_t;
  93 typedef unsigned long  hfn_t;
  94
  95 #define NR_PTE_CHAIN_ENTRIES 5
  96
  97 struct kvm_pte_chain {
  98         u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
  99         struct hlist_node link;
 100 };
 101
 102 /*
 103  * kvm_mmu_page_role, below, is defined as:
 104  *
 105  *   bits 0:3 - total guest paging levels (2-4, or zero for real mode)
 106  *   bits 4:7 - page table level for this shadow (1-4)
 107  *   bits 8:9 - page table quadrant for 2-level guests
 108  *   bit   16 - "metaphysical" - gfn is not a real page (huge page/real mode)
 109  */
 110 union kvm_mmu_page_role {
 111         unsigned word;
 112         struct {
 113                 unsigned glevels : 4;
 114                 unsigned level : 4;
 115                 unsigned quadrant : 2;
 116                 unsigned pad_for_nice_hex_output : 6;
 117                 unsigned metaphysical : 1;
 118         };
 119 };
 120
 121 struct kvm_mmu_page {
 122         struct list_head link;
 123         struct hlist_node hash_link;
 124
 125         /*
 126          * The following two entries are used to key the shadow page in the
 127          * hash table.
 128          */
 129         gfn_t gfn;
 130         union kvm_mmu_page_role role;
 131
 132         hpa_t page_hpa;
 133         unsigned long slot_bitmap; /* One bit set per slot which has memory
 134                                     * in this shadow page.
 135                                     */
 136         int global;              /* Set if all ptes in this page are global */
 137         int multimapped;         /* More than one parent_pte? */
 138         int root_count;          /* Currently serving as active root */
 139         union {
 140                 u64 *parent_pte;               /* !multimapped */
 141                 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
 142         };
 143 };
 144
 145 struct vmcs {
 146         u32 revision_id;
 147         u32 abort;
 148         char data[0];
 149 };
 150
 151 #define vmx_msr_entry kvm_msr_entry
 152
 153 struct kvm_vcpu;
 154
 155 /*
 156  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 157  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 158  * mode.
 159  */
 160 struct kvm_mmu {
 161         void (*new_cr3)(struct kvm_vcpu *vcpu);
 162         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
 163         void (*free)(struct kvm_vcpu *vcpu);
 164         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
 165         hpa_t root_hpa;
 166         int root_level;
 167         int shadow_root_level;
 168
 169         u64 *pae_root;
 170 };
 171
 172 #define KVM_NR_MEM_OBJS 20
 173
 174 struct kvm_mmu_memory_cache {
 175         int nobjs;
 176         void *objects[KVM_NR_MEM_OBJS];
 177 };
 178
 179 /*
 180  * We don't want allocation failures within the mmu code, so we preallocate
 181  * enough memory for a single page fault in a cache.
 182  */
 183 struct kvm_guest_debug {
 184         int enabled;
 185         unsigned long bp[4];
 186         int singlestep;
 187 };
 188
 189 enum {
 190         VCPU_REGS_RAX = 0,
 191         VCPU_REGS_RCX = 1,
 192         VCPU_REGS_RDX = 2,
 193         VCPU_REGS_RBX = 3,
 194         VCPU_REGS_RSP = 4,
 195         VCPU_REGS_RBP = 5,
 196         VCPU_REGS_RSI = 6,
 197         VCPU_REGS_RDI = 7,
 198 #ifdef CONFIG_X86_64
 199         VCPU_REGS_R8 = 8,
 200         VCPU_REGS_R9 = 9,
 201         VCPU_REGS_R10 = 10,
 202         VCPU_REGS_R11 = 11,
 203         VCPU_REGS_R12 = 12,
 204         VCPU_REGS_R13 = 13,
 205         VCPU_REGS_R14 = 14,
 206         VCPU_REGS_R15 = 15,
 207 #endif
 208         NR_VCPU_REGS
 209 };
 210
 211 enum {
 212         VCPU_SREG_CS,
 213         VCPU_SREG_DS,
 214         VCPU_SREG_ES,
 215         VCPU_SREG_FS,
 216         VCPU_SREG_GS,
 217         VCPU_SREG_SS,
 218         VCPU_SREG_TR,
 219         VCPU_SREG_LDTR,
 220 };
 221
 222 struct kvm_vcpu {
 223         struct kvm *kvm;
 224         union {
 225                 struct vmcs *vmcs;
 226                 struct vcpu_svm *svm;
 227         };
 228         struct mutex mutex;
 229         int   cpu;
 230         int   launched;
 231         int interrupt_window_open;
 232         unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
 233 #define NR_IRQ_WORDS KVM_IRQ_BITMAP_SIZE(unsigned long)
 234         unsigned long irq_pending[NR_IRQ_WORDS];
 235         unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
 236         unsigned long rip;      /* needs vcpu_load_rsp_rip() */
 237
 238         unsigned long cr0;
 239         unsigned long cr2;
 240         unsigned long cr3;
 241         gpa_t para_state_gpa;
 242         struct page *para_state_page;
 243         gpa_t hypercall_gpa;
 244         unsigned long cr4;
 245         unsigned long cr8;
 246         u64 pdptrs[4]; /* pae */
 247         u64 shadow_efer;
 248         u64 apic_base;
 249         u64 ia32_misc_enable_msr;
 250         int nmsrs;
 251         struct vmx_msr_entry *guest_msrs;
 252         struct vmx_msr_entry *host_msrs;
 253
 254         struct list_head free_pages;
 255         struct kvm_mmu_page page_header_buf[KVM_NUM_MMU_PAGES];
 256         struct kvm_mmu mmu;
 257
 258         struct kvm_mmu_memory_cache mmu_pte_chain_cache;
 259         struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
 260
 261         gfn_t last_pt_write_gfn;
 262         int   last_pt_write_count;
 263
 264         struct kvm_guest_debug guest_debug;
 265
 266         char fx_buf[FX_BUF_SIZE];
 267         char *host_fx_image;
 268         char *guest_fx_image;
 269
 270         int mmio_needed;
 271         int mmio_read_completed;
 272         int mmio_is_write;
 273         int mmio_size;
 274         unsigned char mmio_data[8];
 275         gpa_t mmio_phys_addr;
 276
 277         struct {
 278                 int active;
 279                 u8 save_iopl;
 280                 struct kvm_save_segment {
 281                         u16 selector;
 282                         unsigned long base;
 283                         u32 limit;
 284                         u32 ar;
 285                 } tr, es, ds, fs, gs;
 286         } rmode;
 287 };
 288
 289 struct kvm_memory_slot {
 290         gfn_t base_gfn;
 291         unsigned long npages;
 292         unsigned long flags;
 293         struct page **phys_mem;
 294         unsigned long *dirty_bitmap;
 295 };
 296
 297 struct kvm {
 298         spinlock_t lock; /* protects everything except vcpus */
 299         int nmemslots;
 300         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS];
 301         /*
 302          * Hash table of struct kvm_mmu_page.
 303          */
 304         struct list_head active_mmu_pages;
 305         int n_free_mmu_pages;
 306         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 307         struct kvm_vcpu vcpus[KVM_MAX_VCPUS];
 308         int memory_config_version;
 309         int busy;
 310         unsigned long rmap_overflow;
 311         struct list_head vm_list;
 312         struct file *filp;
 313 };
 314
 315 struct kvm_stat {
 316         u32 pf_fixed;
 317         u32 pf_guest;
 318         u32 tlb_flush;
 319         u32 invlpg;
 320
 321         u32 exits;
 322         u32 io_exits;
 323         u32 mmio_exits;
 324         u32 signal_exits;
 325         u32 irq_window_exits;
 326         u32 halt_exits;
 327         u32 request_irq_exits;
 328         u32 irq_exits;
 329 };
 330
 331 struct descriptor_table {
 332         u16 limit;
 333         unsigned long base;
 334 } __attribute__((packed));
 335
 336 struct kvm_arch_ops {
 337         int (*cpu_has_kvm_support)(void);          /* __init */
 338         int (*disabled_by_bios)(void);             /* __init */
 339         void (*hardware_enable)(void *dummy);      /* __init */
 340         void (*hardware_disable)(void *dummy);
 341         int (*hardware_setup)(void);               /* __init */
 342         void (*hardware_unsetup)(void);            /* __exit */
 343
 344         int (*vcpu_create)(struct kvm_vcpu *vcpu);
 345         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 346
 347         void (*vcpu_load)(struct kvm_vcpu *vcpu);
 348         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 349         void (*vcpu_decache)(struct kvm_vcpu *vcpu);
 350
 351         int (*set_guest_debug)(struct kvm_vcpu *vcpu,
 352                                struct kvm_debug_guest *dbg);
 353         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 354         int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 355         u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 356         void (*get_segment)(struct kvm_vcpu *vcpu,
 357                             struct kvm_segment *var, int seg);
 358         void (*set_segment)(struct kvm_vcpu *vcpu,
 359                             struct kvm_segment *var, int seg);
 360         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 361         void (*decache_cr0_cr4_guest_bits)(struct kvm_vcpu *vcpu);
 362         void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
 363         void (*set_cr0_no_modeswitch)(struct kvm_vcpu *vcpu,
 364                                       unsigned long cr0);
 365         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 366         void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
 367         void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
 368         void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 369         void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 370         void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 371         void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 372         unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
 373         void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 374                        int *exception);
 375         void (*cache_regs)(struct kvm_vcpu *vcpu);
 376         void (*decache_regs)(struct kvm_vcpu *vcpu);
 377         unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 378         void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 379
 380         void (*invlpg)(struct kvm_vcpu *vcpu, gva_t addr);
 381         void (*tlb_flush)(struct kvm_vcpu *vcpu);
 382         void (*inject_page_fault)(struct kvm_vcpu *vcpu,
 383                                   unsigned long addr, u32 err_code);
 384
 385         void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);
 386
 387         int (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
 388         int (*vcpu_setup)(struct kvm_vcpu *vcpu);
 389         void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 390         void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 391                                 unsigned char *hypercall_addr);
 392 };
 393
 394 extern struct kvm_stat kvm_stat;
 395 extern struct kvm_arch_ops *kvm_arch_ops;
 396
 397 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 398 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 399
 400 int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module);
 401 void kvm_exit_arch(void);
 402
 403 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 404 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 405 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 406
 407 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 408 void kvm_mmu_slot_remove_write_access(struct kvm_vcpu *vcpu, int slot);
 409
 410 hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);
 411 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 412 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 413 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 414 hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);
 415
 416 void kvm_emulator_want_group7_invlpg(void);
 417
 418 extern hpa_t bad_page_address;
 419
 420 static inline struct page *gfn_to_page(struct kvm_memory_slot *slot, gfn_t gfn)
 421 {
 422         return slot->phys_mem[gfn - slot->base_gfn];
 423 }
 424
 425 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 426 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 427
 428 enum emulation_result {
 429         EMULATE_DONE,       /* no further processing */
 430         EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 431         EMULATE_FAIL,         /* can't emulate this instruction */
 432 };
 433
 434 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
 435                         unsigned long cr2, u16 error_code);
 436 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 437 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 438 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
 439                    unsigned long *rflags);
 440
 441 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
 442 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
 443                      unsigned long *rflags);
 444
 445 struct x86_emulate_ctxt;
 446
 447 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 448 int emulate_clts(struct kvm_vcpu *vcpu);
 449 int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr,
 450                     unsigned long *dest);
 451 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
 452                     unsigned long value);
 453
 454 void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 455 void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
 456 void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
 457 void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
 458 void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 459
 460 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 461 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 462
 463 void fx_init(struct kvm_vcpu *vcpu);
 464
 465 void load_msrs(struct vmx_msr_entry *e, int n);
 466 void save_msrs(struct vmx_msr_entry *e, int n);
 467 void kvm_resched(struct kvm_vcpu *vcpu);
 468
 469 int kvm_read_guest(struct kvm_vcpu *vcpu,
 470                gva_t addr,
 471                unsigned long size,
 472                void *dest);
 473
 474 int kvm_write_guest(struct kvm_vcpu *vcpu,
 475                 gva_t addr,
 476                 unsigned long size,
 477                 void *data);
 478
 479 unsigned long segment_base(u16 selector);
 480
 481 void kvm_mmu_pre_write(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes);
 482 void kvm_mmu_post_write(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes);
 483 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 484 void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 485
 486 int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run);
 487
 488 static inline int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
 489                                      u32 error_code)
 490 {
 491         if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
 492                 kvm_mmu_free_some_pages(vcpu);
 493         return vcpu->mmu.page_fault(vcpu, gva, error_code);
 494 }
 495
 496 static inline struct page *_gfn_to_page(struct kvm *kvm, gfn_t gfn)
 497 {
 498         struct kvm_memory_slot *slot = gfn_to_memslot(kvm, gfn);
 499         return (slot) ? slot->phys_mem[gfn - slot->base_gfn] : NULL;
 500 }
 501
 502 static inline int is_long_mode(struct kvm_vcpu *vcpu)
 503 {
 504 #ifdef CONFIG_X86_64
 505         return vcpu->shadow_efer & EFER_LME;
 506 #else
 507         return 0;
 508 #endif
 509 }
 510
 511 static inline int is_pae(struct kvm_vcpu *vcpu)
 512 {
 513         return vcpu->cr4 & CR4_PAE_MASK;
 514 }
 515
 516 static inline int is_pse(struct kvm_vcpu *vcpu)
 517 {
 518         return vcpu->cr4 & CR4_PSE_MASK;
 519 }
 520
 521 static inline int is_paging(struct kvm_vcpu *vcpu)
 522 {
 523         return vcpu->cr0 & CR0_PG_MASK;
 524 }
 525
 526 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
 527 {
 528         return slot - kvm->memslots;
 529 }
 530
 531 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 532 {
 533         struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 534
 535         return (struct kvm_mmu_page *)page_private(page);
 536 }
 537
 538 static inline u16 read_fs(void)
 539 {
 540         u16 seg;
 541         asm ("mov %%fs, %0" : "=g"(seg));
 542         return seg;
 543 }
 544
 545 static inline u16 read_gs(void)
 546 {
 547         u16 seg;
 548         asm ("mov %%gs, %0" : "=g"(seg));
 549         return seg;
 550 }
 551
 552 static inline u16 read_ldt(void)
 553 {
 554         u16 ldt;
 555         asm ("sldt %0" : "=g"(ldt));
 556         return ldt;
 557 }
 558
 559 static inline void load_fs(u16 sel)
 560 {
 561         asm ("mov %0, %%fs" : : "rm"(sel));
 562 }
 563
 564 static inline void load_gs(u16 sel)
 565 {
 566         asm ("mov %0, %%gs" : : "rm"(sel));
 567 }
 568
 569 #ifndef load_ldt
 570 static inline void load_ldt(u16 sel)
 571 {
 572         asm ("lldt %0" : : "rm"(sel));
 573 }
 574 #endif
 575
 576 static inline void get_idt(struct descriptor_table *table)
 577 {
 578         asm ("sidt %0" : "=m"(*table));
 579 }
 580
 581 static inline void get_gdt(struct descriptor_table *table)
 582 {
 583         asm ("sgdt %0" : "=m"(*table));
 584 }
 585
 586 static inline unsigned long read_tr_base(void)
 587 {
 588         u16 tr;
 589         asm ("str %0" : "=g"(tr));
 590         return segment_base(tr);
 591 }
 592
 593 #ifdef CONFIG_X86_64
 594 static inline unsigned long read_msr(unsigned long msr)
 595 {
 596         u64 value;
 597
 598         rdmsrl(msr, value);
 599         return value;
 600 }
 601 #endif
 602
 603 static inline void fx_save(void *image)
 604 {
 605         asm ("fxsave (%0)":: "r" (image));
 606 }
 607
 608 static inline void fx_restore(void *image)
 609 {
 610         asm ("fxrstor (%0)":: "r" (image));
 611 }
 612
 613 static inline void fpu_init(void)
 614 {
 615         asm ("finit");
 616 }
 617
 618 static inline u32 get_rdx_init_val(void)
 619 {
 620         return 0x600; /* P6 family */
 621 }
 622
 623 #define ASM_VMX_VMCLEAR_RAX       ".byte 0x66, 0x0f, 0xc7, 0x30"
 624 #define ASM_VMX_VMLAUNCH          ".byte 0x0f, 0x01, 0xc2"
 625 #define ASM_VMX_VMRESUME          ".byte 0x0f, 0x01, 0xc3"
 626 #define ASM_VMX_VMPTRLD_RAX       ".byte 0x0f, 0xc7, 0x30"
 627 #define ASM_VMX_VMREAD_RDX_RAX    ".byte 0x0f, 0x78, 0xd0"
 628 #define ASM_VMX_VMWRITE_RAX_RDX   ".byte 0x0f, 0x79, 0xd0"
 629 #define ASM_VMX_VMWRITE_RSP_RDX   ".byte 0x0f, 0x79, 0xd4"
 630 #define ASM_VMX_VMXOFF            ".byte 0x0f, 0x01, 0xc4"
 631 #define ASM_VMX_VMXON_RAX         ".byte 0xf3, 0x0f, 0xc7, 0x30"
 632
 633 #define MSR_IA32_TIME_STAMP_COUNTER             0x010
 634
 635 #define TSS_IOPB_BASE_OFFSET 0x66
 636 #define TSS_BASE_SIZE 0x68
 637 #define TSS_IOPB_SIZE (65536 / 8)
 638 #define TSS_REDIRECTION_SIZE (256 / 8)
 639 #define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 640
 641 #endif