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/signal.h>
  14 #include <linux/sched.h>
  15 #include <linux/mm.h>
  16 #include <asm/signal.h>
  17
  18 #include "vmx.h"
  19 #include <linux/kvm.h>
  20 #include <linux/kvm_para.h>
  21
  22 #define CR0_PE_MASK (1ULL << 0)
  23 #define CR0_MP_MASK (1ULL << 1)
  24 #define CR0_TS_MASK (1ULL << 3)
  25 #define CR0_NE_MASK (1ULL << 5)
  26 #define CR0_WP_MASK (1ULL << 16)
  27 #define CR0_NW_MASK (1ULL << 29)
  28 #define CR0_CD_MASK (1ULL << 30)
  29 #define CR0_PG_MASK (1ULL << 31)
  30
  31 #define CR3_WPT_MASK (1ULL << 3)
  32 #define CR3_PCD_MASK (1ULL << 4)
  33
  34 #define CR3_RESEVED_BITS 0x07ULL
  35 #define CR3_L_MODE_RESEVED_BITS (~((1ULL << 40) - 1) | 0x0fe7ULL)
  36 #define CR3_FLAGS_MASK ((1ULL << 5) - 1)
  37
  38 #define CR4_VME_MASK (1ULL << 0)
  39 #define CR4_PSE_MASK (1ULL << 4)
  40 #define CR4_PAE_MASK (1ULL << 5)
  41 #define CR4_PGE_MASK (1ULL << 7)
  42 #define CR4_VMXE_MASK (1ULL << 13)
  43
  44 #define KVM_GUEST_CR0_MASK \
  45         (CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK \
  46          | CR0_NW_MASK | CR0_CD_MASK)
  47 #define KVM_VM_CR0_ALWAYS_ON \
  48         (CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK | CR0_TS_MASK \
  49          | CR0_MP_MASK)
  50 #define KVM_GUEST_CR4_MASK \
  51         (CR4_PSE_MASK | CR4_PAE_MASK | CR4_PGE_MASK | CR4_VMXE_MASK | CR4_VME_MASK)
  52 #define KVM_PMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK | CR4_PAE_MASK)
  53 #define KVM_RMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK | CR4_PAE_MASK | CR4_VME_MASK)
  54
  55 #define INVALID_PAGE (~(hpa_t)0)
  56 #define UNMAPPED_GVA (~(gpa_t)0)
  57
  58 #define KVM_MAX_VCPUS 4
  59 #define KVM_ALIAS_SLOTS 4
  60 #define KVM_MEMORY_SLOTS 4
  61 #define KVM_NUM_MMU_PAGES 1024
  62 #define KVM_MIN_FREE_MMU_PAGES 5
  63 #define KVM_REFILL_PAGES 25
  64 #define KVM_MAX_CPUID_ENTRIES 40
  65
  66 #define FX_IMAGE_SIZE 512
  67 #define FX_IMAGE_ALIGN 16
  68 #define FX_BUF_SIZE (2 * FX_IMAGE_SIZE + FX_IMAGE_ALIGN)
  69
  70 #define DE_VECTOR 0
  71 #define NM_VECTOR 7
  72 #define DF_VECTOR 8
  73 #define TS_VECTOR 10
  74 #define NP_VECTOR 11
  75 #define SS_VECTOR 12
  76 #define GP_VECTOR 13
  77 #define PF_VECTOR 14
  78
  79 #define SELECTOR_TI_MASK (1 << 2)
  80 #define SELECTOR_RPL_MASK 0x03
  81
  82 #define IOPL_SHIFT 12
  83
  84 #define KVM_PIO_PAGE_OFFSET 1
  85
  86 /*
  87  * vcpu->requests bit members
  88  */
  89 #define KVM_TLB_FLUSH 0
  90
  91 /*
  92  * Address types:
  93  *
  94  *  gva - guest virtual address
  95  *  gpa - guest physical address
  96  *  gfn - guest frame number
  97  *  hva - host virtual address
  98  *  hpa - host physical address
  99  *  hfn - host frame number
 100  */
 101
 102 typedef unsigned long  gva_t;
 103 typedef u64            gpa_t;
 104 typedef unsigned long  gfn_t;
 105
 106 typedef unsigned long  hva_t;
 107 typedef u64            hpa_t;
 108 typedef unsigned long  hfn_t;
 109
 110 #define NR_PTE_CHAIN_ENTRIES 5
 111
 112 struct kvm_pte_chain {
 113         u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
 114         struct hlist_node link;
 115 };
 116
 117 /*
 118  * kvm_mmu_page_role, below, is defined as:
 119  *
 120  *   bits 0:3 - total guest paging levels (2-4, or zero for real mode)
 121  *   bits 4:7 - page table level for this shadow (1-4)
 122  *   bits 8:9 - page table quadrant for 2-level guests
 123  *   bit   16 - "metaphysical" - gfn is not a real page (huge page/real mode)
 124  *   bits 17:19 - "access" - the user, writable, and nx bits of a huge page pde
 125  */
 126 union kvm_mmu_page_role {
 127         unsigned word;
 128         struct {
 129                 unsigned glevels : 4;
 130                 unsigned level : 4;
 131                 unsigned quadrant : 2;
 132                 unsigned pad_for_nice_hex_output : 6;
 133                 unsigned metaphysical : 1;
 134                 unsigned hugepage_access : 3;
 135         };
 136 };
 137
 138 struct kvm_mmu_page {
 139         struct list_head link;
 140         struct hlist_node hash_link;
 141
 142         /*
 143          * The following two entries are used to key the shadow page in the
 144          * hash table.
 145          */
 146         gfn_t gfn;
 147         union kvm_mmu_page_role role;
 148
 149         u64 *spt;
 150         unsigned long slot_bitmap; /* One bit set per slot which has memory
 151                                     * in this shadow page.
 152                                     */
 153         int multimapped;         /* More than one parent_pte? */
 154         int root_count;          /* Currently serving as active root */
 155         union {
 156                 u64 *parent_pte;               /* !multimapped */
 157                 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
 158         };
 159 };
 160
 161 struct vmcs {
 162         u32 revision_id;
 163         u32 abort;
 164         char data[0];
 165 };
 166
 167 #define vmx_msr_entry kvm_msr_entry
 168
 169 struct kvm_vcpu;
 170
 171 /*
 172  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 173  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 174  * mode.
 175  */
 176 struct kvm_mmu {
 177         void (*new_cr3)(struct kvm_vcpu *vcpu);
 178         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
 179         void (*free)(struct kvm_vcpu *vcpu);
 180         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
 181         hpa_t root_hpa;
 182         int root_level;
 183         int shadow_root_level;
 184
 185         u64 *pae_root;
 186 };
 187
 188 #define KVM_NR_MEM_OBJS 20
 189
 190 struct kvm_mmu_memory_cache {
 191         int nobjs;
 192         void *objects[KVM_NR_MEM_OBJS];
 193 };
 194
 195 /*
 196  * We don't want allocation failures within the mmu code, so we preallocate
 197  * enough memory for a single page fault in a cache.
 198  */
 199 struct kvm_guest_debug {
 200         int enabled;
 201         unsigned long bp[4];
 202         int singlestep;
 203 };
 204
 205 enum {
 206         VCPU_REGS_RAX = 0,
 207         VCPU_REGS_RCX = 1,
 208         VCPU_REGS_RDX = 2,
 209         VCPU_REGS_RBX = 3,
 210         VCPU_REGS_RSP = 4,
 211         VCPU_REGS_RBP = 5,
 212         VCPU_REGS_RSI = 6,
 213         VCPU_REGS_RDI = 7,
 214 #ifdef CONFIG_X86_64
 215         VCPU_REGS_R8 = 8,
 216         VCPU_REGS_R9 = 9,
 217         VCPU_REGS_R10 = 10,
 218         VCPU_REGS_R11 = 11,
 219         VCPU_REGS_R12 = 12,
 220         VCPU_REGS_R13 = 13,
 221         VCPU_REGS_R14 = 14,
 222         VCPU_REGS_R15 = 15,
 223 #endif
 224         NR_VCPU_REGS
 225 };
 226
 227 enum {
 228         VCPU_SREG_CS,
 229         VCPU_SREG_DS,
 230         VCPU_SREG_ES,
 231         VCPU_SREG_FS,
 232         VCPU_SREG_GS,
 233         VCPU_SREG_SS,
 234         VCPU_SREG_TR,
 235         VCPU_SREG_LDTR,
 236 };
 237
 238 struct kvm_pio_request {
 239         unsigned long count;
 240         int cur_count;
 241         struct page *guest_pages[2];
 242         unsigned guest_page_offset;
 243         int in;
 244         int port;
 245         int size;
 246         int string;
 247         int down;
 248         int rep;
 249 };
 250
 251 struct kvm_stat {
 252         u32 pf_fixed;
 253         u32 pf_guest;
 254         u32 tlb_flush;
 255         u32 invlpg;
 256
 257         u32 exits;
 258         u32 io_exits;
 259         u32 mmio_exits;
 260         u32 signal_exits;
 261         u32 irq_window_exits;
 262         u32 halt_exits;
 263         u32 request_irq_exits;
 264         u32 irq_exits;
 265         u32 light_exits;
 266         u32 efer_reload;
 267 };
 268
 269 struct kvm_io_device {
 270         void (*read)(struct kvm_io_device *this,
 271                      gpa_t addr,
 272                      int len,
 273                      void *val);
 274         void (*write)(struct kvm_io_device *this,
 275                       gpa_t addr,
 276                       int len,
 277                       const void *val);
 278         int (*in_range)(struct kvm_io_device *this, gpa_t addr);
 279         void (*destructor)(struct kvm_io_device *this);
 280
 281         void             *private;
 282 };
 283
 284 static inline void kvm_iodevice_read(struct kvm_io_device *dev,
 285                                      gpa_t addr,
 286                                      int len,
 287                                      void *val)
 288 {
 289         dev->read(dev, addr, len, val);
 290 }
 291
 292 static inline void kvm_iodevice_write(struct kvm_io_device *dev,
 293                                       gpa_t addr,
 294                                       int len,
 295                                       const void *val)
 296 {
 297         dev->write(dev, addr, len, val);
 298 }
 299
 300 static inline int kvm_iodevice_inrange(struct kvm_io_device *dev, gpa_t addr)
 301 {
 302         return dev->in_range(dev, addr);
 303 }
 304
 305 static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
 306 {
 307         if (dev->destructor)
 308                 dev->destructor(dev);
 309 }
 310
 311 /*
 312  * It would be nice to use something smarter than a linear search, TBD...
 313  * Thankfully we dont expect many devices to register (famous last words :),
 314  * so until then it will suffice.  At least its abstracted so we can change
 315  * in one place.
 316  */
 317 struct kvm_io_bus {
 318         int                   dev_count;
 319 #define NR_IOBUS_DEVS 6
 320         struct kvm_io_device *devs[NR_IOBUS_DEVS];
 321 };
 322
 323 void kvm_io_bus_init(struct kvm_io_bus *bus);
 324 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
 325 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
 326 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
 327                              struct kvm_io_device *dev);
 328
 329 struct kvm_vcpu {
 330         struct kvm *kvm;
 331         union {
 332                 struct vmcs *vmcs;
 333                 struct vcpu_svm *svm;
 334         };
 335         struct mutex mutex;
 336         int   cpu;
 337         int   launched;
 338         u64 host_tsc;
 339         struct kvm_run *run;
 340         int interrupt_window_open;
 341         int guest_mode;
 342         unsigned long requests;
 343         unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
 344 #define NR_IRQ_WORDS KVM_IRQ_BITMAP_SIZE(unsigned long)
 345         unsigned long irq_pending[NR_IRQ_WORDS];
 346         unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
 347         unsigned long rip;      /* needs vcpu_load_rsp_rip() */
 348
 349         unsigned long cr0;
 350         unsigned long cr2;
 351         unsigned long cr3;
 352         gpa_t para_state_gpa;
 353         struct page *para_state_page;
 354         gpa_t hypercall_gpa;
 355         unsigned long cr4;
 356         unsigned long cr8;
 357         u64 pdptrs[4]; /* pae */
 358         u64 shadow_efer;
 359         u64 apic_base;
 360         u64 ia32_misc_enable_msr;
 361         int nmsrs;
 362         int save_nmsrs;
 363         int msr_offset_efer;
 364 #ifdef CONFIG_X86_64
 365         int msr_offset_kernel_gs_base;
 366 #endif
 367         struct vmx_msr_entry *guest_msrs;
 368         struct vmx_msr_entry *host_msrs;
 369
 370         struct kvm_mmu mmu;
 371
 372         struct kvm_mmu_memory_cache mmu_pte_chain_cache;
 373         struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
 374         struct kvm_mmu_memory_cache mmu_page_cache;
 375         struct kvm_mmu_memory_cache mmu_page_header_cache;
 376
 377         gfn_t last_pt_write_gfn;
 378         int   last_pt_write_count;
 379
 380         struct kvm_guest_debug guest_debug;
 381
 382         char fx_buf[FX_BUF_SIZE];
 383         char *host_fx_image;
 384         char *guest_fx_image;
 385         int fpu_active;
 386         int guest_fpu_loaded;
 387         struct vmx_host_state {
 388                 int loaded;
 389                 u16 fs_sel, gs_sel, ldt_sel;
 390                 int fs_gs_ldt_reload_needed;
 391         } vmx_host_state;
 392
 393         int mmio_needed;
 394         int mmio_read_completed;
 395         int mmio_is_write;
 396         int mmio_size;
 397         unsigned char mmio_data[8];
 398         gpa_t mmio_phys_addr;
 399         gva_t mmio_fault_cr2;
 400         struct kvm_pio_request pio;
 401         void *pio_data;
 402
 403         int sigset_active;
 404         sigset_t sigset;
 405
 406         struct kvm_stat stat;
 407
 408         struct {
 409                 int active;
 410                 u8 save_iopl;
 411                 struct kvm_save_segment {
 412                         u16 selector;
 413                         unsigned long base;
 414                         u32 limit;
 415                         u32 ar;
 416                 } tr, es, ds, fs, gs;
 417         } rmode;
 418         int halt_request; /* real mode on Intel only */
 419
 420         int cpuid_nent;
 421         struct kvm_cpuid_entry cpuid_entries[KVM_MAX_CPUID_ENTRIES];
 422 };
 423
 424 struct kvm_mem_alias {
 425         gfn_t base_gfn;
 426         unsigned long npages;
 427         gfn_t target_gfn;
 428 };
 429
 430 struct kvm_memory_slot {
 431         gfn_t base_gfn;
 432         unsigned long npages;
 433         unsigned long flags;
 434         struct page **phys_mem;
 435         unsigned long *dirty_bitmap;
 436 };
 437
 438 struct kvm {
 439         spinlock_t lock; /* protects everything except vcpus */
 440         int naliases;
 441         struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
 442         int nmemslots;
 443         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS];
 444         /*
 445          * Hash table of struct kvm_mmu_page.
 446          */
 447         struct list_head active_mmu_pages;
 448         int n_free_mmu_pages;
 449         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 450         int nvcpus;
 451         struct kvm_vcpu vcpus[KVM_MAX_VCPUS];
 452         int memory_config_version;
 453         int busy;
 454         unsigned long rmap_overflow;
 455         struct list_head vm_list;
 456         struct file *filp;
 457         struct kvm_io_bus mmio_bus;
 458         struct kvm_io_bus pio_bus;
 459 };
 460
 461 struct descriptor_table {
 462         u16 limit;
 463         unsigned long base;
 464 } __attribute__((packed));
 465
 466 struct kvm_arch_ops {
 467         int (*cpu_has_kvm_support)(void);          /* __init */
 468         int (*disabled_by_bios)(void);             /* __init */
 469         void (*hardware_enable)(void *dummy);      /* __init */
 470         void (*hardware_disable)(void *dummy);
 471         int (*hardware_setup)(void);               /* __init */
 472         void (*hardware_unsetup)(void);            /* __exit */
 473
 474         int (*vcpu_create)(struct kvm_vcpu *vcpu);
 475         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 476
 477         void (*vcpu_load)(struct kvm_vcpu *vcpu);
 478         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 479         void (*vcpu_decache)(struct kvm_vcpu *vcpu);
 480
 481         int (*set_guest_debug)(struct kvm_vcpu *vcpu,
 482                                struct kvm_debug_guest *dbg);
 483         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 484         int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 485         u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 486         void (*get_segment)(struct kvm_vcpu *vcpu,
 487                             struct kvm_segment *var, int seg);
 488         void (*set_segment)(struct kvm_vcpu *vcpu,
 489                             struct kvm_segment *var, int seg);
 490         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 491         void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
 492         void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
 493         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 494         void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
 495         void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
 496         void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 497         void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 498         void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 499         void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 500         unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
 501         void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 502                        int *exception);
 503         void (*cache_regs)(struct kvm_vcpu *vcpu);
 504         void (*decache_regs)(struct kvm_vcpu *vcpu);
 505         unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 506         void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 507
 508         void (*invlpg)(struct kvm_vcpu *vcpu, gva_t addr);
 509         void (*tlb_flush)(struct kvm_vcpu *vcpu);
 510         void (*inject_page_fault)(struct kvm_vcpu *vcpu,
 511                                   unsigned long addr, u32 err_code);
 512
 513         void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);
 514
 515         int (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
 516         int (*vcpu_setup)(struct kvm_vcpu *vcpu);
 517         void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 518         void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 519                                 unsigned char *hypercall_addr);
 520 };
 521
 522 extern struct kvm_arch_ops *kvm_arch_ops;
 523
 524 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 525 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 526
 527 int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module);
 528 void kvm_exit_arch(void);
 529
 530 int kvm_mmu_module_init(void);
 531 void kvm_mmu_module_exit(void);
 532
 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
 537 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 538 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 539 void kvm_mmu_zap_all(struct kvm *kvm);
 540
 541 hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);
 542 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 543 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 544 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 545 hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);
 546 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
 547
 548 void kvm_emulator_want_group7_invlpg(void);
 549
 550 extern hpa_t bad_page_address;
 551
 552 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 553 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 554 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 555
 556 enum emulation_result {
 557         EMULATE_DONE,       /* no further processing */
 558         EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 559         EMULATE_FAIL,         /* can't emulate this instruction */
 560 };
 561
 562 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
 563                         unsigned long cr2, u16 error_code);
 564 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 565 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 566 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
 567                    unsigned long *rflags);
 568
 569 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
 570 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
 571                      unsigned long *rflags);
 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);
 574
 575 struct x86_emulate_ctxt;
 576
 577 int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 578                   int size, unsigned long count, int string, int down,
 579                   gva_t address, int rep, unsigned port);
 580 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 581 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 582 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 583 int emulate_clts(struct kvm_vcpu *vcpu);
 584 int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr,
 585                     unsigned long *dest);
 586 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
 587                     unsigned long value);
 588
 589 void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 590 void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
 591 void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
 592 void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
 593 void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 594
 595 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 596 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 597
 598 void fx_init(struct kvm_vcpu *vcpu);
 599
 600 void load_msrs(struct vmx_msr_entry *e, int n);
 601 void save_msrs(struct vmx_msr_entry *e, int n);
 602 void kvm_resched(struct kvm_vcpu *vcpu);
 603 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 604 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 605 void kvm_flush_remote_tlbs(struct kvm *kvm);
 606
 607 int kvm_read_guest(struct kvm_vcpu *vcpu,
 608                gva_t addr,
 609                unsigned long size,
 610                void *dest);
 611
 612 int kvm_write_guest(struct kvm_vcpu *vcpu,
 613                 gva_t addr,
 614                 unsigned long size,
 615                 void *data);
 616
 617 unsigned long segment_base(u16 selector);
 618
 619 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 620                        const u8 *old, const u8 *new, int bytes);
 621 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 622 void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 623 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 624 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 625
 626 int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run);
 627
 628 static inline int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
 629                                      u32 error_code)
 630 {
 631         if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
 632                 kvm_mmu_free_some_pages(vcpu);
 633         return vcpu->mmu.page_fault(vcpu, gva, error_code);
 634 }
 635
 636 static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
 637 {
 638         if (likely(vcpu->mmu.root_hpa != INVALID_PAGE))
 639                 return 0;
 640
 641         return kvm_mmu_load(vcpu);
 642 }
 643
 644 static inline int is_long_mode(struct kvm_vcpu *vcpu)
 645 {
 646 #ifdef CONFIG_X86_64
 647         return vcpu->shadow_efer & EFER_LME;
 648 #else
 649         return 0;
 650 #endif
 651 }
 652
 653 static inline int is_pae(struct kvm_vcpu *vcpu)
 654 {
 655         return vcpu->cr4 & CR4_PAE_MASK;
 656 }
 657
 658 static inline int is_pse(struct kvm_vcpu *vcpu)
 659 {
 660         return vcpu->cr4 & CR4_PSE_MASK;
 661 }
 662
 663 static inline int is_paging(struct kvm_vcpu *vcpu)
 664 {
 665         return vcpu->cr0 & CR0_PG_MASK;
 666 }
 667
 668 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
 669 {
 670         return slot - kvm->memslots;
 671 }
 672
 673 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 674 {
 675         struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 676
 677         return (struct kvm_mmu_page *)page_private(page);
 678 }
 679
 680 static inline u16 read_fs(void)
 681 {
 682         u16 seg;
 683         asm ("mov %%fs, %0" : "=g"(seg));
 684         return seg;
 685 }
 686
 687 static inline u16 read_gs(void)
 688 {
 689         u16 seg;
 690         asm ("mov %%gs, %0" : "=g"(seg));
 691         return seg;
 692 }
 693
 694 static inline u16 read_ldt(void)
 695 {
 696         u16 ldt;
 697         asm ("sldt %0" : "=g"(ldt));
 698         return ldt;
 699 }
 700
 701 static inline void load_fs(u16 sel)
 702 {
 703         asm ("mov %0, %%fs" : : "rm"(sel));
 704 }
 705
 706 static inline void load_gs(u16 sel)
 707 {
 708         asm ("mov %0, %%gs" : : "rm"(sel));
 709 }
 710
 711 #ifndef load_ldt
 712 static inline void load_ldt(u16 sel)
 713 {
 714         asm ("lldt %0" : : "rm"(sel));
 715 }
 716 #endif
 717
 718 static inline void get_idt(struct descriptor_table *table)
 719 {
 720         asm ("sidt %0" : "=m"(*table));
 721 }
 722
 723 static inline void get_gdt(struct descriptor_table *table)
 724 {
 725         asm ("sgdt %0" : "=m"(*table));
 726 }
 727
 728 static inline unsigned long read_tr_base(void)
 729 {
 730         u16 tr;
 731         asm ("str %0" : "=g"(tr));
 732         return segment_base(tr);
 733 }
 734
 735 #ifdef CONFIG_X86_64
 736 static inline unsigned long read_msr(unsigned long msr)
 737 {
 738         u64 value;
 739
 740         rdmsrl(msr, value);
 741         return value;
 742 }
 743 #endif
 744
 745 static inline void fx_save(void *image)
 746 {
 747         asm ("fxsave (%0)":: "r" (image));
 748 }
 749
 750 static inline void fx_restore(void *image)
 751 {
 752         asm ("fxrstor (%0)":: "r" (image));
 753 }
 754
 755 static inline void fpu_init(void)
 756 {
 757         asm ("finit");
 758 }
 759
 760 static inline u32 get_rdx_init_val(void)
 761 {
 762         return 0x600; /* P6 family */
 763 }
 764
 765 #define ASM_VMX_VMCLEAR_RAX       ".byte 0x66, 0x0f, 0xc7, 0x30"
 766 #define ASM_VMX_VMLAUNCH          ".byte 0x0f, 0x01, 0xc2"
 767 #define ASM_VMX_VMRESUME          ".byte 0x0f, 0x01, 0xc3"
 768 #define ASM_VMX_VMPTRLD_RAX       ".byte 0x0f, 0xc7, 0x30"
 769 #define ASM_VMX_VMREAD_RDX_RAX    ".byte 0x0f, 0x78, 0xd0"
 770 #define ASM_VMX_VMWRITE_RAX_RDX   ".byte 0x0f, 0x79, 0xd0"
 771 #define ASM_VMX_VMWRITE_RSP_RDX   ".byte 0x0f, 0x79, 0xd4"
 772 #define ASM_VMX_VMXOFF            ".byte 0x0f, 0x01, 0xc4"
 773 #define ASM_VMX_VMXON_RAX         ".byte 0xf3, 0x0f, 0xc7, 0x30"
 774
 775 #define MSR_IA32_TIME_STAMP_COUNTER             0x010
 776
 777 #define TSS_IOPB_BASE_OFFSET 0x66
 778 #define TSS_BASE_SIZE 0x68
 779 #define TSS_IOPB_SIZE (65536 / 8)
 780 #define TSS_REDIRECTION_SIZE (256 / 8)
 781 #define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 782
 783 #endif