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 #include <asm/signal.h>
  15
  16 #include "vmx.h"
  17 #include <linux/kvm.h>
  18 #include <linux/kvm_para.h>
  19
  20 #define CR0_PE_MASK (1ULL << 0)
  21 #define CR0_MP_MASK (1ULL << 1)
  22 #define CR0_TS_MASK (1ULL << 3)
  23 #define CR0_NE_MASK (1ULL << 5)
  24 #define CR0_WP_MASK (1ULL << 16)
  25 #define CR0_NW_MASK (1ULL << 29)
  26 #define CR0_CD_MASK (1ULL << 30)
  27 #define CR0_PG_MASK (1ULL << 31)
  28
  29 #define CR3_WPT_MASK (1ULL << 3)
  30 #define CR3_PCD_MASK (1ULL << 4)
  31
  32 #define CR3_RESEVED_BITS 0x07ULL
  33 #define CR3_L_MODE_RESEVED_BITS (~((1ULL << 40) - 1) | 0x0fe7ULL)
  34 #define CR3_FLAGS_MASK ((1ULL << 5) - 1)
  35
  36 #define CR4_VME_MASK (1ULL << 0)
  37 #define CR4_PSE_MASK (1ULL << 4)
  38 #define CR4_PAE_MASK (1ULL << 5)
  39 #define CR4_PGE_MASK (1ULL << 7)
  40 #define CR4_VMXE_MASK (1ULL << 13)
  41
  42 #define KVM_GUEST_CR0_MASK \
  43         (CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK \
  44          | CR0_NW_MASK | CR0_CD_MASK)
  45 #define KVM_VM_CR0_ALWAYS_ON \
  46         (CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK | CR0_TS_MASK \
  47          | CR0_MP_MASK)
  48 #define KVM_GUEST_CR4_MASK \
  49         (CR4_PSE_MASK | CR4_PAE_MASK | CR4_PGE_MASK | CR4_VMXE_MASK | CR4_VME_MASK)
  50 #define KVM_PMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK | CR4_PAE_MASK)
  51 #define KVM_RMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK | CR4_PAE_MASK | CR4_VME_MASK)
  52
  53 #define INVALID_PAGE (~(hpa_t)0)
  54 #define UNMAPPED_GVA (~(gpa_t)0)
  55
  56 #define KVM_MAX_VCPUS 1
  57 #define KVM_ALIAS_SLOTS 4
  58 #define KVM_MEMORY_SLOTS 4
  59 #define KVM_NUM_MMU_PAGES 1024
  60 #define KVM_MIN_FREE_MMU_PAGES 5
  61 #define KVM_REFILL_PAGES 25
  62 #define KVM_MAX_CPUID_ENTRIES 40
  63
  64 #define FX_IMAGE_SIZE 512
  65 #define FX_IMAGE_ALIGN 16
  66 #define FX_BUF_SIZE (2 * FX_IMAGE_SIZE + FX_IMAGE_ALIGN)
  67
  68 #define DE_VECTOR 0
  69 #define NM_VECTOR 7
  70 #define DF_VECTOR 8
  71 #define TS_VECTOR 10
  72 #define NP_VECTOR 11
  73 #define SS_VECTOR 12
  74 #define GP_VECTOR 13
  75 #define PF_VECTOR 14
  76
  77 #define SELECTOR_TI_MASK (1 << 2)
  78 #define SELECTOR_RPL_MASK 0x03
  79
  80 #define IOPL_SHIFT 12
  81
  82 #define KVM_PIO_PAGE_OFFSET 1
  83
  84 /*
  85  * Address types:
  86  *
  87  *  gva - guest virtual address
  88  *  gpa - guest physical address
  89  *  gfn - guest frame number
  90  *  hva - host virtual address
  91  *  hpa - host physical address
  92  *  hfn - host frame number
  93  */
  94
  95 typedef unsigned long  gva_t;
  96 typedef u64            gpa_t;
  97 typedef unsigned long  gfn_t;
  98
  99 typedef unsigned long  hva_t;
 100 typedef u64            hpa_t;
 101 typedef unsigned long  hfn_t;
 102
 103 #define NR_PTE_CHAIN_ENTRIES 5
 104
 105 struct kvm_pte_chain {
 106         u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
 107         struct hlist_node link;
 108 };
 109
 110 /*
 111  * kvm_mmu_page_role, below, is defined as:
 112  *
 113  *   bits 0:3 - total guest paging levels (2-4, or zero for real mode)
 114  *   bits 4:7 - page table level for this shadow (1-4)
 115  *   bits 8:9 - page table quadrant for 2-level guests
 116  *   bit   16 - "metaphysical" - gfn is not a real page (huge page/real mode)
 117  *   bits 17:18 - "access" - the user and writable bits of a huge page pde
 118  */
 119 union kvm_mmu_page_role {
 120         unsigned word;
 121         struct {
 122                 unsigned glevels : 4;
 123                 unsigned level : 4;
 124                 unsigned quadrant : 2;
 125                 unsigned pad_for_nice_hex_output : 6;
 126                 unsigned metaphysical : 1;
 127                 unsigned hugepage_access : 2;
 128         };
 129 };
 130
 131 struct kvm_mmu_page {
 132         struct list_head link;
 133         struct hlist_node hash_link;
 134
 135         /*
 136          * The following two entries are used to key the shadow page in the
 137          * hash table.
 138          */
 139         gfn_t gfn;
 140         union kvm_mmu_page_role role;
 141
 142         u64 *spt;
 143         unsigned long slot_bitmap; /* One bit set per slot which has memory
 144                                     * in this shadow page.
 145                                     */
 146         int multimapped;         /* More than one parent_pte? */
 147         int root_count;          /* Currently serving as active root */
 148         union {
 149                 u64 *parent_pte;               /* !multimapped */
 150                 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
 151         };
 152 };
 153
 154 struct vmcs {
 155         u32 revision_id;
 156         u32 abort;
 157         char data[0];
 158 };
 159
 160 #define vmx_msr_entry kvm_msr_entry
 161
 162 struct kvm_vcpu;
 163
 164 /*
 165  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 166  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 167  * mode.
 168  */
 169 struct kvm_mmu {
 170         void (*new_cr3)(struct kvm_vcpu *vcpu);
 171         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
 172         void (*free)(struct kvm_vcpu *vcpu);
 173         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
 174         hpa_t root_hpa;
 175         int root_level;
 176         int shadow_root_level;
 177
 178         u64 *pae_root;
 179 };
 180
 181 #define KVM_NR_MEM_OBJS 20
 182
 183 struct kvm_mmu_memory_cache {
 184         int nobjs;
 185         void *objects[KVM_NR_MEM_OBJS];
 186 };
 187
 188 /*
 189  * We don't want allocation failures within the mmu code, so we preallocate
 190  * enough memory for a single page fault in a cache.
 191  */
 192 struct kvm_guest_debug {
 193         int enabled;
 194         unsigned long bp[4];
 195         int singlestep;
 196 };
 197
 198 enum {
 199         VCPU_REGS_RAX = 0,
 200         VCPU_REGS_RCX = 1,
 201         VCPU_REGS_RDX = 2,
 202         VCPU_REGS_RBX = 3,
 203         VCPU_REGS_RSP = 4,
 204         VCPU_REGS_RBP = 5,
 205         VCPU_REGS_RSI = 6,
 206         VCPU_REGS_RDI = 7,
 207 #ifdef CONFIG_X86_64
 208         VCPU_REGS_R8 = 8,
 209         VCPU_REGS_R9 = 9,
 210         VCPU_REGS_R10 = 10,
 211         VCPU_REGS_R11 = 11,
 212         VCPU_REGS_R12 = 12,
 213         VCPU_REGS_R13 = 13,
 214         VCPU_REGS_R14 = 14,
 215         VCPU_REGS_R15 = 15,
 216 #endif
 217         NR_VCPU_REGS
 218 };
 219
 220 enum {
 221         VCPU_SREG_CS,
 222         VCPU_SREG_DS,
 223         VCPU_SREG_ES,
 224         VCPU_SREG_FS,
 225         VCPU_SREG_GS,
 226         VCPU_SREG_SS,
 227         VCPU_SREG_TR,
 228         VCPU_SREG_LDTR,
 229 };
 230
 231 struct kvm_pio_request {
 232         unsigned long count;
 233         int cur_count;
 234         struct page *guest_pages[2];
 235         unsigned guest_page_offset;
 236         int in;
 237         int size;
 238         int string;
 239         int down;
 240         int rep;
 241 };
 242
 243 struct kvm_stat {
 244         u32 pf_fixed;
 245         u32 pf_guest;
 246         u32 tlb_flush;
 247         u32 invlpg;
 248
 249         u32 exits;
 250         u32 io_exits;
 251         u32 mmio_exits;
 252         u32 signal_exits;
 253         u32 irq_window_exits;
 254         u32 halt_exits;
 255         u32 request_irq_exits;
 256         u32 irq_exits;
 257         u32 light_exits;
 258 };
 259
 260 struct kvm_vcpu {
 261         struct kvm *kvm;
 262         union {
 263                 struct vmcs *vmcs;
 264                 struct vcpu_svm *svm;
 265         };
 266         struct mutex mutex;
 267         int   cpu;
 268         int   launched;
 269         u64 host_tsc;
 270         struct kvm_run *run;
 271         int interrupt_window_open;
 272         unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
 273 #define NR_IRQ_WORDS KVM_IRQ_BITMAP_SIZE(unsigned long)
 274         unsigned long irq_pending[NR_IRQ_WORDS];
 275         unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
 276         unsigned long rip;      /* needs vcpu_load_rsp_rip() */
 277
 278         unsigned long cr0;
 279         unsigned long cr2;
 280         unsigned long cr3;
 281         gpa_t para_state_gpa;
 282         struct page *para_state_page;
 283         gpa_t hypercall_gpa;
 284         unsigned long cr4;
 285         unsigned long cr8;
 286         u64 pdptrs[4]; /* pae */
 287         u64 shadow_efer;
 288         u64 apic_base;
 289         u64 ia32_misc_enable_msr;
 290         int nmsrs;
 291         int save_nmsrs;
 292 #ifdef CONFIG_X86_64
 293         int msr_offset_kernel_gs_base;
 294 #endif
 295         struct vmx_msr_entry *guest_msrs;
 296         struct vmx_msr_entry *host_msrs;
 297
 298         struct list_head free_pages;
 299         struct kvm_mmu_page page_header_buf[KVM_NUM_MMU_PAGES];
 300         struct kvm_mmu mmu;
 301
 302         struct kvm_mmu_memory_cache mmu_pte_chain_cache;
 303         struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
 304
 305         gfn_t last_pt_write_gfn;
 306         int   last_pt_write_count;
 307
 308         struct kvm_guest_debug guest_debug;
 309
 310         char fx_buf[FX_BUF_SIZE];
 311         char *host_fx_image;
 312         char *guest_fx_image;
 313         int fpu_active;
 314         int guest_fpu_loaded;
 315         struct vmx_host_state {
 316                 int loaded;
 317                 u16 fs_sel, gs_sel, ldt_sel;
 318                 int fs_gs_ldt_reload_needed;
 319         } vmx_host_state;
 320
 321         int mmio_needed;
 322         int mmio_read_completed;
 323         int mmio_is_write;
 324         int mmio_size;
 325         unsigned char mmio_data[8];
 326         gpa_t mmio_phys_addr;
 327         gva_t mmio_fault_cr2;
 328         struct kvm_pio_request pio;
 329         void *pio_data;
 330
 331         int sigset_active;
 332         sigset_t sigset;
 333
 334         struct kvm_stat stat;
 335
 336         struct {
 337                 int active;
 338                 u8 save_iopl;
 339                 struct kvm_save_segment {
 340                         u16 selector;
 341                         unsigned long base;
 342                         u32 limit;
 343                         u32 ar;
 344                 } tr, es, ds, fs, gs;
 345         } rmode;
 346
 347         int cpuid_nent;
 348         struct kvm_cpuid_entry cpuid_entries[KVM_MAX_CPUID_ENTRIES];
 349 };
 350
 351 struct kvm_mem_alias {
 352         gfn_t base_gfn;
 353         unsigned long npages;
 354         gfn_t target_gfn;
 355 };
 356
 357 struct kvm_memory_slot {
 358         gfn_t base_gfn;
 359         unsigned long npages;
 360         unsigned long flags;
 361         struct page **phys_mem;
 362         unsigned long *dirty_bitmap;
 363 };
 364
 365 struct kvm {
 366         spinlock_t lock; /* protects everything except vcpus */
 367         int naliases;
 368         struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
 369         int nmemslots;
 370         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS];
 371         /*
 372          * Hash table of struct kvm_mmu_page.
 373          */
 374         struct list_head active_mmu_pages;
 375         int n_free_mmu_pages;
 376         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 377         struct kvm_vcpu vcpus[KVM_MAX_VCPUS];
 378         int memory_config_version;
 379         int busy;
 380         unsigned long rmap_overflow;
 381         struct list_head vm_list;
 382         struct file *filp;
 383 };
 384
 385 struct descriptor_table {
 386         u16 limit;
 387         unsigned long base;
 388 } __attribute__((packed));
 389
 390 struct kvm_arch_ops {
 391         int (*cpu_has_kvm_support)(void);          /* __init */
 392         int (*disabled_by_bios)(void);             /* __init */
 393         void (*hardware_enable)(void *dummy);      /* __init */
 394         void (*hardware_disable)(void *dummy);
 395         int (*hardware_setup)(void);               /* __init */
 396         void (*hardware_unsetup)(void);            /* __exit */
 397
 398         int (*vcpu_create)(struct kvm_vcpu *vcpu);
 399         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 400
 401         void (*vcpu_load)(struct kvm_vcpu *vcpu);
 402         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 403         void (*vcpu_decache)(struct kvm_vcpu *vcpu);
 404
 405         int (*set_guest_debug)(struct kvm_vcpu *vcpu,
 406                                struct kvm_debug_guest *dbg);
 407         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 408         int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 409         u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 410         void (*get_segment)(struct kvm_vcpu *vcpu,
 411                             struct kvm_segment *var, int seg);
 412         void (*set_segment)(struct kvm_vcpu *vcpu,
 413                             struct kvm_segment *var, int seg);
 414         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 415         void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
 416         void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
 417         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 418         void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
 419         void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
 420         void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 421         void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 422         void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 423         void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 424         unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
 425         void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 426                        int *exception);
 427         void (*cache_regs)(struct kvm_vcpu *vcpu);
 428         void (*decache_regs)(struct kvm_vcpu *vcpu);
 429         unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 430         void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 431
 432         void (*invlpg)(struct kvm_vcpu *vcpu, gva_t addr);
 433         void (*tlb_flush)(struct kvm_vcpu *vcpu);
 434         void (*inject_page_fault)(struct kvm_vcpu *vcpu,
 435                                   unsigned long addr, u32 err_code);
 436
 437         void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);
 438
 439         int (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
 440         int (*vcpu_setup)(struct kvm_vcpu *vcpu);
 441         void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 442         void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 443                                 unsigned char *hypercall_addr);
 444 };
 445
 446 extern struct kvm_arch_ops *kvm_arch_ops;
 447
 448 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 449 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 450
 451 int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module);
 452 void kvm_exit_arch(void);
 453
 454 int kvm_mmu_module_init(void);
 455 void kvm_mmu_module_exit(void);
 456
 457 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 458 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 459 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 460
 461 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 462 void kvm_mmu_slot_remove_write_access(struct kvm_vcpu *vcpu, int slot);
 463 void kvm_mmu_zap_all(struct kvm_vcpu *vcpu);
 464
 465 hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);
 466 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 467 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 468 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 469 hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);
 470 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
 471
 472 void kvm_emulator_want_group7_invlpg(void);
 473
 474 extern hpa_t bad_page_address;
 475
 476 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 477 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 478 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 479
 480 enum emulation_result {
 481         EMULATE_DONE,       /* no further processing */
 482         EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 483         EMULATE_FAIL,         /* can't emulate this instruction */
 484 };
 485
 486 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
 487                         unsigned long cr2, u16 error_code);
 488 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 489 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 490 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
 491                    unsigned long *rflags);
 492
 493 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
 494 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
 495                      unsigned long *rflags);
 496
 497 struct x86_emulate_ctxt;
 498
 499 int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 500                   int size, unsigned long count, int string, int down,
 501                   gva_t address, int rep, unsigned port);
 502 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 503 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 504 int emulate_clts(struct kvm_vcpu *vcpu);
 505 int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr,
 506                     unsigned long *dest);
 507 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
 508                     unsigned long value);
 509
 510 void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 511 void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
 512 void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
 513 void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
 514 void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 515
 516 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 517 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 518
 519 void fx_init(struct kvm_vcpu *vcpu);
 520
 521 void load_msrs(struct vmx_msr_entry *e, int n);
 522 void save_msrs(struct vmx_msr_entry *e, int n);
 523 void kvm_resched(struct kvm_vcpu *vcpu);
 524 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 525 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 526
 527 int kvm_read_guest(struct kvm_vcpu *vcpu,
 528                gva_t addr,
 529                unsigned long size,
 530                void *dest);
 531
 532 int kvm_write_guest(struct kvm_vcpu *vcpu,
 533                 gva_t addr,
 534                 unsigned long size,
 535                 void *data);
 536
 537 unsigned long segment_base(u16 selector);
 538
 539 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 540                        const u8 *old, const u8 *new, int bytes);
 541 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 542 void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 543
 544 int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run);
 545
 546 static inline int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
 547                                      u32 error_code)
 548 {
 549         if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
 550                 kvm_mmu_free_some_pages(vcpu);
 551         return vcpu->mmu.page_fault(vcpu, gva, error_code);
 552 }
 553
 554 static inline int is_long_mode(struct kvm_vcpu *vcpu)
 555 {
 556 #ifdef CONFIG_X86_64
 557         return vcpu->shadow_efer & EFER_LME;
 558 #else
 559         return 0;
 560 #endif
 561 }
 562
 563 static inline int is_pae(struct kvm_vcpu *vcpu)
 564 {
 565         return vcpu->cr4 & CR4_PAE_MASK;
 566 }
 567
 568 static inline int is_pse(struct kvm_vcpu *vcpu)
 569 {
 570         return vcpu->cr4 & CR4_PSE_MASK;
 571 }
 572
 573 static inline int is_paging(struct kvm_vcpu *vcpu)
 574 {
 575         return vcpu->cr0 & CR0_PG_MASK;
 576 }
 577
 578 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
 579 {
 580         return slot - kvm->memslots;
 581 }
 582
 583 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 584 {
 585         struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 586
 587         return (struct kvm_mmu_page *)page_private(page);
 588 }
 589
 590 static inline u16 read_fs(void)
 591 {
 592         u16 seg;
 593         asm ("mov %%fs, %0" : "=g"(seg));
 594         return seg;
 595 }
 596
 597 static inline u16 read_gs(void)
 598 {
 599         u16 seg;
 600         asm ("mov %%gs, %0" : "=g"(seg));
 601         return seg;
 602 }
 603
 604 static inline u16 read_ldt(void)
 605 {
 606         u16 ldt;
 607         asm ("sldt %0" : "=g"(ldt));
 608         return ldt;
 609 }
 610
 611 static inline void load_fs(u16 sel)
 612 {
 613         asm ("mov %0, %%fs" : : "rm"(sel));
 614 }
 615
 616 static inline void load_gs(u16 sel)
 617 {
 618         asm ("mov %0, %%gs" : : "rm"(sel));
 619 }
 620
 621 #ifndef load_ldt
 622 static inline void load_ldt(u16 sel)
 623 {
 624         asm ("lldt %0" : : "rm"(sel));
 625 }
 626 #endif
 627
 628 static inline void get_idt(struct descriptor_table *table)
 629 {
 630         asm ("sidt %0" : "=m"(*table));
 631 }
 632
 633 static inline void get_gdt(struct descriptor_table *table)
 634 {
 635         asm ("sgdt %0" : "=m"(*table));
 636 }
 637
 638 static inline unsigned long read_tr_base(void)
 639 {
 640         u16 tr;
 641         asm ("str %0" : "=g"(tr));
 642         return segment_base(tr);
 643 }
 644
 645 #ifdef CONFIG_X86_64
 646 static inline unsigned long read_msr(unsigned long msr)
 647 {
 648         u64 value;
 649
 650         rdmsrl(msr, value);
 651         return value;
 652 }
 653 #endif
 654
 655 static inline void fx_save(void *image)
 656 {
 657         asm ("fxsave (%0)":: "r" (image));
 658 }
 659
 660 static inline void fx_restore(void *image)
 661 {
 662         asm ("fxrstor (%0)":: "r" (image));
 663 }
 664
 665 static inline void fpu_init(void)
 666 {
 667         asm ("finit");
 668 }
 669
 670 static inline u32 get_rdx_init_val(void)
 671 {
 672         return 0x600; /* P6 family */
 673 }
 674
 675 #define ASM_VMX_VMCLEAR_RAX       ".byte 0x66, 0x0f, 0xc7, 0x30"
 676 #define ASM_VMX_VMLAUNCH          ".byte 0x0f, 0x01, 0xc2"
 677 #define ASM_VMX_VMRESUME          ".byte 0x0f, 0x01, 0xc3"
 678 #define ASM_VMX_VMPTRLD_RAX       ".byte 0x0f, 0xc7, 0x30"
 679 #define ASM_VMX_VMREAD_RDX_RAX    ".byte 0x0f, 0x78, 0xd0"
 680 #define ASM_VMX_VMWRITE_RAX_RDX   ".byte 0x0f, 0x79, 0xd0"
 681 #define ASM_VMX_VMWRITE_RSP_RDX   ".byte 0x0f, 0x79, 0xd4"
 682 #define ASM_VMX_VMXOFF            ".byte 0x0f, 0x01, 0xc4"
 683 #define ASM_VMX_VMXON_RAX         ".byte 0xf3, 0x0f, 0xc7, 0x30"
 684
 685 #define MSR_IA32_TIME_STAMP_COUNTER             0x010
 686
 687 #define TSS_IOPB_BASE_OFFSET 0x66
 688 #define TSS_BASE_SIZE 0x68
 689 #define TSS_IOPB_SIZE (65536 / 8)
 690 #define TSS_REDIRECTION_SIZE (256 / 8)
 691 #define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 692
 693 #endif