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/hardirq.h>
  11 #include <linux/list.h>
  12 #include <linux/mutex.h>
  13 #include <linux/spinlock.h>
  14 #include <linux/signal.h>
  15 #include <linux/sched.h>
  16 #include <linux/mm.h>
  17 #include <linux/preempt.h>
  18 #include <asm/signal.h>
  19
  20 #include <linux/kvm.h>
  21 #include <linux/kvm_para.h>
  22
  23 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
  24 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
  25 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS|0xFFFFFF0000000000ULL)
  26
  27 #define KVM_GUEST_CR0_MASK \
  28         (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
  29          | X86_CR0_NW | X86_CR0_CD)
  30 #define KVM_VM_CR0_ALWAYS_ON \
  31         (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
  32          | X86_CR0_MP)
  33 #define KVM_GUEST_CR4_MASK \
  34         (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
  35 #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
  36 #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
  37
  38 #define INVALID_PAGE (~(hpa_t)0)
  39 #define UNMAPPED_GVA (~(gpa_t)0)
  40
  41 #define KVM_MAX_VCPUS 4
  42 #define KVM_ALIAS_SLOTS 4
  43 #define KVM_MEMORY_SLOTS 8
  44 #define KVM_PERMILLE_MMU_PAGES 20
  45 #define KVM_MIN_ALLOC_MMU_PAGES 64
  46 #define KVM_NUM_MMU_PAGES 1024
  47 #define KVM_MIN_FREE_MMU_PAGES 5
  48 #define KVM_REFILL_PAGES 25
  49 #define KVM_MAX_CPUID_ENTRIES 40
  50
  51 #define DE_VECTOR 0
  52 #define UD_VECTOR 6
  53 #define NM_VECTOR 7
  54 #define DF_VECTOR 8
  55 #define TS_VECTOR 10
  56 #define NP_VECTOR 11
  57 #define SS_VECTOR 12
  58 #define GP_VECTOR 13
  59 #define PF_VECTOR 14
  60
  61 #define SELECTOR_TI_MASK (1 << 2)
  62 #define SELECTOR_RPL_MASK 0x03
  63
  64 #define IOPL_SHIFT 12
  65
  66 #define KVM_PIO_PAGE_OFFSET 1
  67
  68 /*
  69  * vcpu->requests bit members
  70  */
  71 #define KVM_REQ_TLB_FLUSH          0
  72
  73 /*
  74  * Address types:
  75  *
  76  *  gva - guest virtual address
  77  *  gpa - guest physical address
  78  *  gfn - guest frame number
  79  *  hva - host virtual address
  80  *  hpa - host physical address
  81  *  hfn - host frame number
  82  */
  83
  84 typedef unsigned long  gva_t;
  85 typedef u64            gpa_t;
  86 typedef unsigned long  gfn_t;
  87
  88 typedef unsigned long  hva_t;
  89 typedef u64            hpa_t;
  90 typedef unsigned long  hfn_t;
  91
  92 #define NR_PTE_CHAIN_ENTRIES 5
  93
  94 struct kvm_pte_chain {
  95         u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
  96         struct hlist_node link;
  97 };
  98
  99 /*
 100  * kvm_mmu_page_role, below, is defined as:
 101  *
 102  *   bits 0:3 - total guest paging levels (2-4, or zero for real mode)
 103  *   bits 4:7 - page table level for this shadow (1-4)
 104  *   bits 8:9 - page table quadrant for 2-level guests
 105  *   bit   16 - "metaphysical" - gfn is not a real page (huge page/real mode)
 106  *   bits 17:19 - "access" - the user, writable, and nx bits of a huge page pde
 107  */
 108 union kvm_mmu_page_role {
 109         unsigned word;
 110         struct {
 111                 unsigned glevels : 4;
 112                 unsigned level : 4;
 113                 unsigned quadrant : 2;
 114                 unsigned pad_for_nice_hex_output : 6;
 115                 unsigned metaphysical : 1;
 116                 unsigned hugepage_access : 3;
 117         };
 118 };
 119
 120 struct kvm_mmu_page {
 121         struct list_head link;
 122         struct hlist_node hash_link;
 123
 124         /*
 125          * The following two entries are used to key the shadow page in the
 126          * hash table.
 127          */
 128         gfn_t gfn;
 129         union kvm_mmu_page_role role;
 130
 131         u64 *spt;
 132         /* hold the gfn of each spte inside spt */
 133         gfn_t *gfns;
 134         unsigned long slot_bitmap; /* One bit set per slot which has memory
 135                                     * in this shadow page.
 136                                     */
 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 kvm_vcpu;
 146 extern struct kmem_cache *kvm_vcpu_cache;
 147
 148 /*
 149  * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 150  * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 151  * mode.
 152  */
 153 struct kvm_mmu {
 154         void (*new_cr3)(struct kvm_vcpu *vcpu);
 155         int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
 156         void (*free)(struct kvm_vcpu *vcpu);
 157         gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
 158         void (*prefetch_page)(struct kvm_vcpu *vcpu,
 159                               struct kvm_mmu_page *page);
 160         hpa_t root_hpa;
 161         int root_level;
 162         int shadow_root_level;
 163
 164         u64 *pae_root;
 165 };
 166
 167 #define KVM_NR_MEM_OBJS 40
 168
 169 struct kvm_mmu_memory_cache {
 170         int nobjs;
 171         void *objects[KVM_NR_MEM_OBJS];
 172 };
 173
 174 /*
 175  * We don't want allocation failures within the mmu code, so we preallocate
 176  * enough memory for a single page fault in a cache.
 177  */
 178 struct kvm_guest_debug {
 179         int enabled;
 180         unsigned long bp[4];
 181         int singlestep;
 182 };
 183
 184 enum {
 185         VCPU_REGS_RAX = 0,
 186         VCPU_REGS_RCX = 1,
 187         VCPU_REGS_RDX = 2,
 188         VCPU_REGS_RBX = 3,
 189         VCPU_REGS_RSP = 4,
 190         VCPU_REGS_RBP = 5,
 191         VCPU_REGS_RSI = 6,
 192         VCPU_REGS_RDI = 7,
 193 #ifdef CONFIG_X86_64
 194         VCPU_REGS_R8 = 8,
 195         VCPU_REGS_R9 = 9,
 196         VCPU_REGS_R10 = 10,
 197         VCPU_REGS_R11 = 11,
 198         VCPU_REGS_R12 = 12,
 199         VCPU_REGS_R13 = 13,
 200         VCPU_REGS_R14 = 14,
 201         VCPU_REGS_R15 = 15,
 202 #endif
 203         NR_VCPU_REGS
 204 };
 205
 206 enum {
 207         VCPU_SREG_CS,
 208         VCPU_SREG_DS,
 209         VCPU_SREG_ES,
 210         VCPU_SREG_FS,
 211         VCPU_SREG_GS,
 212         VCPU_SREG_SS,
 213         VCPU_SREG_TR,
 214         VCPU_SREG_LDTR,
 215 };
 216
 217 #include "x86_emulate.h"
 218
 219 struct kvm_pio_request {
 220         unsigned long count;
 221         int cur_count;
 222         struct page *guest_pages[2];
 223         unsigned guest_page_offset;
 224         int in;
 225         int port;
 226         int size;
 227         int string;
 228         int down;
 229         int rep;
 230 };
 231
 232 struct kvm_stat {
 233         u32 pf_fixed;
 234         u32 pf_guest;
 235         u32 tlb_flush;
 236         u32 invlpg;
 237
 238         u32 exits;
 239         u32 io_exits;
 240         u32 mmio_exits;
 241         u32 signal_exits;
 242         u32 irq_window_exits;
 243         u32 halt_exits;
 244         u32 halt_wakeup;
 245         u32 request_irq_exits;
 246         u32 irq_exits;
 247         u32 light_exits;
 248         u32 efer_reload;
 249 };
 250
 251 struct kvm_io_device {
 252         void (*read)(struct kvm_io_device *this,
 253                      gpa_t addr,
 254                      int len,
 255                      void *val);
 256         void (*write)(struct kvm_io_device *this,
 257                       gpa_t addr,
 258                       int len,
 259                       const void *val);
 260         int (*in_range)(struct kvm_io_device *this, gpa_t addr);
 261         void (*destructor)(struct kvm_io_device *this);
 262
 263         void             *private;
 264 };
 265
 266 static inline void kvm_iodevice_read(struct kvm_io_device *dev,
 267                                      gpa_t addr,
 268                                      int len,
 269                                      void *val)
 270 {
 271         dev->read(dev, addr, len, val);
 272 }
 273
 274 static inline void kvm_iodevice_write(struct kvm_io_device *dev,
 275                                       gpa_t addr,
 276                                       int len,
 277                                       const void *val)
 278 {
 279         dev->write(dev, addr, len, val);
 280 }
 281
 282 static inline int kvm_iodevice_inrange(struct kvm_io_device *dev, gpa_t addr)
 283 {
 284         return dev->in_range(dev, addr);
 285 }
 286
 287 static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
 288 {
 289         if (dev->destructor)
 290                 dev->destructor(dev);
 291 }
 292
 293 /*
 294  * It would be nice to use something smarter than a linear search, TBD...
 295  * Thankfully we dont expect many devices to register (famous last words :),
 296  * so until then it will suffice.  At least its abstracted so we can change
 297  * in one place.
 298  */
 299 struct kvm_io_bus {
 300         int                   dev_count;
 301 #define NR_IOBUS_DEVS 6
 302         struct kvm_io_device *devs[NR_IOBUS_DEVS];
 303 };
 304
 305 void kvm_io_bus_init(struct kvm_io_bus *bus);
 306 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
 307 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
 308 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
 309                              struct kvm_io_device *dev);
 310
 311 #ifdef CONFIG_HAS_IOMEM
 312 #define KVM_VCPU_MMIO                   \
 313         int mmio_needed;                \
 314         int mmio_read_completed;        \
 315         int mmio_is_write;              \
 316         int mmio_size;                  \
 317         unsigned char mmio_data[8];     \
 318         gpa_t mmio_phys_addr;
 319
 320 #else
 321 #define KVM_VCPU_MMIO
 322
 323 #endif
 324
 325 #define KVM_VCPU_COMM                                   \
 326         struct kvm *kvm;                                \
 327         struct preempt_notifier preempt_notifier;       \
 328         int vcpu_id;                                    \
 329         struct mutex mutex;                             \
 330         int   cpu;                                      \
 331         struct kvm_run *run;                            \
 332         int guest_mode;                                 \
 333         unsigned long requests;                         \
 334         struct kvm_guest_debug guest_debug;             \
 335         int fpu_active;                                 \
 336         int guest_fpu_loaded;                           \
 337         wait_queue_head_t wq;                           \
 338         int sigset_active;                              \
 339         sigset_t sigset;                                \
 340         struct kvm_stat stat;                           \
 341         KVM_VCPU_MMIO
 342
 343 struct kvm_mem_alias {
 344         gfn_t base_gfn;
 345         unsigned long npages;
 346         gfn_t target_gfn;
 347 };
 348
 349 struct kvm_memory_slot {
 350         gfn_t base_gfn;
 351         unsigned long npages;
 352         unsigned long flags;
 353         unsigned long *rmap;
 354         unsigned long *dirty_bitmap;
 355         unsigned long userspace_addr;
 356         int user_alloc;
 357 };
 358
 359 struct kvm {
 360         struct mutex lock; /* protects everything except vcpus */
 361         int naliases;
 362         struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
 363         int nmemslots;
 364         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS];
 365         /*
 366          * Hash table of struct kvm_mmu_page.
 367          */
 368         struct list_head active_mmu_pages;
 369         unsigned int n_free_mmu_pages;
 370         unsigned int n_requested_mmu_pages;
 371         unsigned int n_alloc_mmu_pages;
 372         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 373         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 374         unsigned long rmap_overflow;
 375         struct list_head vm_list;
 376         struct file *filp;
 377         struct kvm_io_bus mmio_bus;
 378         struct kvm_io_bus pio_bus;
 379         struct kvm_pic *vpic;
 380         struct kvm_ioapic *vioapic;
 381         int round_robin_prev_vcpu;
 382 };
 383
 384 static inline struct kvm_pic *pic_irqchip(struct kvm *kvm)
 385 {
 386         return kvm->vpic;
 387 }
 388
 389 static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)
 390 {
 391         return kvm->vioapic;
 392 }
 393
 394 static inline int irqchip_in_kernel(struct kvm *kvm)
 395 {
 396         return pic_irqchip(kvm) != 0;
 397 }
 398
 399 struct descriptor_table {
 400         u16 limit;
 401         unsigned long base;
 402 } __attribute__((packed));
 403
 404 struct kvm_x86_ops {
 405         int (*cpu_has_kvm_support)(void);          /* __init */
 406         int (*disabled_by_bios)(void);             /* __init */
 407         void (*hardware_enable)(void *dummy);      /* __init */
 408         void (*hardware_disable)(void *dummy);
 409         void (*check_processor_compatibility)(void *rtn);
 410         int (*hardware_setup)(void);               /* __init */
 411         void (*hardware_unsetup)(void);            /* __exit */
 412
 413         /* Create, but do not attach this VCPU */
 414         struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
 415         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 416         int (*vcpu_reset)(struct kvm_vcpu *vcpu);
 417
 418         void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
 419         void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
 420         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 421         void (*vcpu_decache)(struct kvm_vcpu *vcpu);
 422
 423         int (*set_guest_debug)(struct kvm_vcpu *vcpu,
 424                                struct kvm_debug_guest *dbg);
 425         void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
 426         int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
 427         int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 428         u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
 429         void (*get_segment)(struct kvm_vcpu *vcpu,
 430                             struct kvm_segment *var, int seg);
 431         void (*set_segment)(struct kvm_vcpu *vcpu,
 432                             struct kvm_segment *var, int seg);
 433         void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
 434         void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
 435         void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
 436         void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
 437         void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
 438         void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
 439         void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 440         void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 441         void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 442         void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
 443         unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
 444         void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
 445                        int *exception);
 446         void (*cache_regs)(struct kvm_vcpu *vcpu);
 447         void (*decache_regs)(struct kvm_vcpu *vcpu);
 448         unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
 449         void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
 450
 451         void (*tlb_flush)(struct kvm_vcpu *vcpu);
 452         void (*inject_page_fault)(struct kvm_vcpu *vcpu,
 453                                   unsigned long addr, u32 err_code);
 454
 455         void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);
 456
 457         void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
 458         int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
 459         void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
 460         void (*patch_hypercall)(struct kvm_vcpu *vcpu,
 461                                 unsigned char *hypercall_addr);
 462         int (*get_irq)(struct kvm_vcpu *vcpu);
 463         void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
 464         void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
 465         void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
 466                                        struct kvm_run *run);
 467 };
 468
 469 extern struct kvm_x86_ops *kvm_x86_ops;
 470
 471 /* The guest did something we don't support. */
 472 #define pr_unimpl(vcpu, fmt, ...)                                       \
 473  do {                                                                   \
 474         if (printk_ratelimit())                                         \
 475                 printk(KERN_ERR "kvm: %i: cpu%i " fmt,                  \
 476                        current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 477  } while (0)
 478
 479 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 480 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 481
 482 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 483 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 484
 485 void vcpu_load(struct kvm_vcpu *vcpu);
 486 void vcpu_put(struct kvm_vcpu *vcpu);
 487
 488
 489 int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size,
 490                   struct module *module);
 491 void kvm_exit_x86(void);
 492
 493 int kvm_mmu_module_init(void);
 494 void kvm_mmu_module_exit(void);
 495
 496 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 497 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 498 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 499 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
 500
 501 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 502 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
 503 void kvm_mmu_zap_all(struct kvm *kvm);
 504 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
 505
 506 hpa_t gpa_to_hpa(struct kvm *kvm, gpa_t gpa);
 507 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 508 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 509 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 510 hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);
 511 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
 512
 513 extern struct page *bad_page;
 514
 515 int is_error_page(struct page *page);
 516 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
 517 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 518 void kvm_release_page(struct page *page);
 519 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 520                         int len);
 521 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 522 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 523                          int offset, int len);
 524 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 525                     unsigned long len);
 526 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 527 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 528 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 529 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 530
 531 enum emulation_result {
 532         EMULATE_DONE,       /* no further processing */
 533         EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
 534         EMULATE_FAIL,         /* can't emulate this instruction */
 535 };
 536
 537 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
 538                         unsigned long cr2, u16 error_code, int no_decode);
 539 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
 540 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 541 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
 542 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
 543                    unsigned long *rflags);
 544
 545 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
 546 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
 547                      unsigned long *rflags);
 548 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
 549 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
 550
 551 struct x86_emulate_ctxt;
 552
 553 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 554                      int size, unsigned port);
 555 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
 556                            int size, unsigned long count, int down,
 557                             gva_t address, int rep, unsigned port);
 558 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
 559 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 560 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
 561 int emulate_clts(struct kvm_vcpu *vcpu);
 562 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
 563                     unsigned long *dest);
 564 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
 565                     unsigned long value);
 566
 567 void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
 568 void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
 569 void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
 570 void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
 571 unsigned long get_cr8(struct kvm_vcpu *vcpu);
 572 void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 573 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
 574
 575 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 576 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 577
 578 void fx_init(struct kvm_vcpu *vcpu);
 579
 580 void kvm_resched(struct kvm_vcpu *vcpu);
 581 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 582 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 583 void kvm_flush_remote_tlbs(struct kvm *kvm);
 584
 585 int emulator_read_std(unsigned long addr,
 586                       void *val,
 587                       unsigned int bytes,
 588                       struct kvm_vcpu *vcpu);
 589 int emulator_write_emulated(unsigned long addr,
 590                             const void *val,
 591                             unsigned int bytes,
 592                             struct kvm_vcpu *vcpu);
 593
 594 unsigned long segment_base(u16 selector);
 595
 596 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 597                        const u8 *new, int bytes);
 598 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 599 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 600 int kvm_mmu_load(struct kvm_vcpu *vcpu);
 601 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
 602
 603 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 604
 605 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
 606
 607 long kvm_arch_dev_ioctl(struct file *filp,
 608                         unsigned int ioctl, unsigned long arg);
 609 long kvm_arch_vcpu_ioctl(struct file *filp,
 610                          unsigned int ioctl, unsigned long arg);
 611 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 612 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 613
 614 __init void kvm_arch_init(void);
 615
 616 static inline void kvm_guest_enter(void)
 617 {
 618         account_system_vtime(current);
 619         current->flags |= PF_VCPU;
 620 }
 621
 622 static inline void kvm_guest_exit(void)
 623 {
 624         account_system_vtime(current);
 625         current->flags &= ~PF_VCPU;
 626 }
 627
 628 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
 629 {
 630         return slot - kvm->memslots;
 631 }
 632
 633 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
 634 {
 635         struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
 636
 637         return (struct kvm_mmu_page *)page_private(page);
 638 }
 639
 640 static inline u16 read_fs(void)
 641 {
 642         u16 seg;
 643         asm("mov %%fs, %0" : "=g"(seg));
 644         return seg;
 645 }
 646
 647 static inline u16 read_gs(void)
 648 {
 649         u16 seg;
 650         asm("mov %%gs, %0" : "=g"(seg));
 651         return seg;
 652 }
 653
 654 static inline u16 read_ldt(void)
 655 {
 656         u16 ldt;
 657         asm("sldt %0" : "=g"(ldt));
 658         return ldt;
 659 }
 660
 661 static inline void load_fs(u16 sel)
 662 {
 663         asm("mov %0, %%fs" : : "rm"(sel));
 664 }
 665
 666 static inline void load_gs(u16 sel)
 667 {
 668         asm("mov %0, %%gs" : : "rm"(sel));
 669 }
 670
 671 #ifndef load_ldt
 672 static inline void load_ldt(u16 sel)
 673 {
 674         asm("lldt %0" : : "rm"(sel));
 675 }
 676 #endif
 677
 678 static inline void get_idt(struct descriptor_table *table)
 679 {
 680         asm("sidt %0" : "=m"(*table));
 681 }
 682
 683 static inline void get_gdt(struct descriptor_table *table)
 684 {
 685         asm("sgdt %0" : "=m"(*table));
 686 }
 687
 688 static inline unsigned long read_tr_base(void)
 689 {
 690         u16 tr;
 691         asm("str %0" : "=g"(tr));
 692         return segment_base(tr);
 693 }
 694
 695 #ifdef CONFIG_X86_64
 696 static inline unsigned long read_msr(unsigned long msr)
 697 {
 698         u64 value;
 699
 700         rdmsrl(msr, value);
 701         return value;
 702 }
 703 #endif
 704
 705 static inline void fx_save(struct i387_fxsave_struct *image)
 706 {
 707         asm("fxsave (%0)":: "r" (image));
 708 }
 709
 710 static inline void fx_restore(struct i387_fxsave_struct *image)
 711 {
 712         asm("fxrstor (%0)":: "r" (image));
 713 }
 714
 715 static inline void fpu_init(void)
 716 {
 717         asm("finit");
 718 }
 719
 720 static inline u32 get_rdx_init_val(void)
 721 {
 722         return 0x600; /* P6 family */
 723 }
 724
 725 #define ASM_VMX_VMCLEAR_RAX       ".byte 0x66, 0x0f, 0xc7, 0x30"
 726 #define ASM_VMX_VMLAUNCH          ".byte 0x0f, 0x01, 0xc2"
 727 #define ASM_VMX_VMRESUME          ".byte 0x0f, 0x01, 0xc3"
 728 #define ASM_VMX_VMPTRLD_RAX       ".byte 0x0f, 0xc7, 0x30"
 729 #define ASM_VMX_VMREAD_RDX_RAX    ".byte 0x0f, 0x78, 0xd0"
 730 #define ASM_VMX_VMWRITE_RAX_RDX   ".byte 0x0f, 0x79, 0xd0"
 731 #define ASM_VMX_VMWRITE_RSP_RDX   ".byte 0x0f, 0x79, 0xd4"
 732 #define ASM_VMX_VMXOFF            ".byte 0x0f, 0x01, 0xc4"
 733 #define ASM_VMX_VMXON_RAX         ".byte 0xf3, 0x0f, 0xc7, 0x30"
 734
 735 #define MSR_IA32_TIME_STAMP_COUNTER             0x010
 736
 737 #define TSS_IOPB_BASE_OFFSET 0x66
 738 #define TSS_BASE_SIZE 0x68
 739 #define TSS_IOPB_SIZE (65536 / 8)
 740 #define TSS_REDIRECTION_SIZE (256 / 8)
 741 #define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
 742
 743 #endif