include/linux/kvm_host.h

   1 #ifndef __KVM_HOST_H
   2 #define __KVM_HOST_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/bug.h>
  17 #include <linux/mm.h>
  18 #include <linux/mmu_notifier.h>
  19 #include <linux/preempt.h>
  20 #include <linux/msi.h>
  21 #include <linux/slab.h>
  22 #include <linux/rcupdate.h>
  23 #include <linux/ratelimit.h>
  24 #include <linux/err.h>
  25 #include <asm/signal.h>
  26
  27 #include <linux/kvm.h>
  28 #include <linux/kvm_para.h>
  29
  30 #include <linux/kvm_types.h>
  31
  32 #include <asm/kvm_host.h>
  33
  34 #ifndef KVM_MMIO_SIZE
  35 #define KVM_MMIO_SIZE 8
  36 #endif
  37
  38 /*
  39  * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
  40  * in kvm, other bits are visible for userspace which are defined in
  41  * include/linux/kvm_h.
  42  */
  43 #define KVM_MEMSLOT_INVALID     (1UL << 16)
  44
  45 /* Two fragments for cross MMIO pages. */
  46 #define KVM_MAX_MMIO_FRAGMENTS  2
  47
  48 /*
  49  * For the normal pfn, the highest 12 bits should be zero,
  50  * so we can mask these bits to indicate the error.
  51  */
  52 #define KVM_PFN_ERR_MASK        (0xfffULL << 52)
  53
  54 #define KVM_PFN_ERR_FAULT       (KVM_PFN_ERR_MASK)
  55 #define KVM_PFN_ERR_HWPOISON    (KVM_PFN_ERR_MASK + 1)
  56 #define KVM_PFN_ERR_BAD         (KVM_PFN_ERR_MASK + 2)
  57 #define KVM_PFN_ERR_RO_FAULT    (KVM_PFN_ERR_MASK + 3)
  58
  59 static inline bool is_error_pfn(pfn_t pfn)
  60 {
  61         return !!(pfn & KVM_PFN_ERR_MASK);
  62 }
  63
  64 static inline bool is_noslot_pfn(pfn_t pfn)
  65 {
  66         return pfn == KVM_PFN_ERR_BAD;
  67 }
  68
  69 static inline bool is_invalid_pfn(pfn_t pfn)
  70 {
  71         return !is_noslot_pfn(pfn) && is_error_pfn(pfn);
  72 }
  73
  74 #define KVM_HVA_ERR_BAD         (PAGE_OFFSET)
  75 #define KVM_HVA_ERR_RO_BAD      (PAGE_OFFSET + PAGE_SIZE)
  76
  77 static inline bool kvm_is_error_hva(unsigned long addr)
  78 {
  79         return addr >= PAGE_OFFSET;
  80 }
  81
  82 #define KVM_ERR_PTR_BAD_PAGE    (ERR_PTR(-ENOENT))
  83
  84 static inline bool is_error_page(struct page *page)
  85 {
  86         return IS_ERR(page);
  87 }
  88
  89 /*
  90  * vcpu->requests bit members
  91  */
  92 #define KVM_REQ_TLB_FLUSH          0
  93 #define KVM_REQ_MIGRATE_TIMER      1
  94 #define KVM_REQ_REPORT_TPR_ACCESS  2
  95 #define KVM_REQ_MMU_RELOAD         3
  96 #define KVM_REQ_TRIPLE_FAULT       4
  97 #define KVM_REQ_PENDING_TIMER      5
  98 #define KVM_REQ_UNHALT             6
  99 #define KVM_REQ_MMU_SYNC           7
 100 #define KVM_REQ_CLOCK_UPDATE       8
 101 #define KVM_REQ_KICK               9
 102 #define KVM_REQ_DEACTIVATE_FPU    10
 103 #define KVM_REQ_EVENT             11
 104 #define KVM_REQ_APF_HALT          12
 105 #define KVM_REQ_STEAL_UPDATE      13
 106 #define KVM_REQ_NMI               14
 107 #define KVM_REQ_IMMEDIATE_EXIT    15
 108 #define KVM_REQ_PMU               16
 109 #define KVM_REQ_PMI               17
 110
 111 #define KVM_USERSPACE_IRQ_SOURCE_ID             0
 112 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID        1
 113
 114 struct kvm;
 115 struct kvm_vcpu;
 116 extern struct kmem_cache *kvm_vcpu_cache;
 117
 118 struct kvm_io_range {
 119         gpa_t addr;
 120         int len;
 121         struct kvm_io_device *dev;
 122 };
 123
 124 #define NR_IOBUS_DEVS 1000
 125
 126 struct kvm_io_bus {
 127         int                   dev_count;
 128         struct kvm_io_range range[];
 129 };
 130
 131 enum kvm_bus {
 132         KVM_MMIO_BUS,
 133         KVM_PIO_BUS,
 134         KVM_NR_BUSES
 135 };
 136
 137 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
 138                      int len, const void *val);
 139 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
 140                     void *val);
 141 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
 142                             int len, struct kvm_io_device *dev);
 143 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
 144                               struct kvm_io_device *dev);
 145
 146 #ifdef CONFIG_KVM_ASYNC_PF
 147 struct kvm_async_pf {
 148         struct work_struct work;
 149         struct list_head link;
 150         struct list_head queue;
 151         struct kvm_vcpu *vcpu;
 152         struct mm_struct *mm;
 153         gva_t gva;
 154         unsigned long addr;
 155         struct kvm_arch_async_pf arch;
 156         struct page *page;
 157         bool done;
 158 };
 159
 160 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
 161 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
 162 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
 163                        struct kvm_arch_async_pf *arch);
 164 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
 165 #endif
 166
 167 enum {
 168         OUTSIDE_GUEST_MODE,
 169         IN_GUEST_MODE,
 170         EXITING_GUEST_MODE,
 171         READING_SHADOW_PAGE_TABLES,
 172 };
 173
 174 /*
 175  * Sometimes a large or cross-page mmio needs to be broken up into separate
 176  * exits for userspace servicing.
 177  */
 178 struct kvm_mmio_fragment {
 179         gpa_t gpa;
 180         void *data;
 181         unsigned len;
 182 };
 183
 184 struct kvm_vcpu {
 185         struct kvm *kvm;
 186 #ifdef CONFIG_PREEMPT_NOTIFIERS
 187         struct preempt_notifier preempt_notifier;
 188 #endif
 189         int cpu;
 190         int vcpu_id;
 191         int srcu_idx;
 192         int mode;
 193         unsigned long requests;
 194         unsigned long guest_debug;
 195
 196         struct mutex mutex;
 197         struct kvm_run *run;
 198
 199         int fpu_active;
 200         int guest_fpu_loaded, guest_xcr0_loaded;
 201         wait_queue_head_t wq;
 202         struct pid *pid;
 203         int sigset_active;
 204         sigset_t sigset;
 205         struct kvm_vcpu_stat stat;
 206
 207 #ifdef CONFIG_HAS_IOMEM
 208         int mmio_needed;
 209         int mmio_read_completed;
 210         int mmio_is_write;
 211         int mmio_cur_fragment;
 212         int mmio_nr_fragments;
 213         struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
 214 #endif
 215
 216 #ifdef CONFIG_KVM_ASYNC_PF
 217         struct {
 218                 u32 queued;
 219                 struct list_head queue;
 220                 struct list_head done;
 221                 spinlock_t lock;
 222         } async_pf;
 223 #endif
 224
 225 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
 226         /*
 227          * Cpu relax intercept or pause loop exit optimization
 228          * in_spin_loop: set when a vcpu does a pause loop exit
 229          *  or cpu relax intercepted.
 230          * dy_eligible: indicates whether vcpu is eligible for directed yield.
 231          */
 232         struct {
 233                 bool in_spin_loop;
 234                 bool dy_eligible;
 235         } spin_loop;
 236 #endif
 237         struct kvm_vcpu_arch arch;
 238 };
 239
 240 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
 241 {
 242         return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
 243 }
 244
 245 /*
 246  * Some of the bitops functions do not support too long bitmaps.
 247  * This number must be determined not to exceed such limits.
 248  */
 249 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
 250
 251 struct kvm_memory_slot {
 252         gfn_t base_gfn;
 253         unsigned long npages;
 254         unsigned long flags;
 255         unsigned long *dirty_bitmap;
 256         struct kvm_arch_memory_slot arch;
 257         unsigned long userspace_addr;
 258         int user_alloc;
 259         int id;
 260 };
 261
 262 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
 263 {
 264         return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
 265 }
 266
 267 struct kvm_kernel_irq_routing_entry {
 268         u32 gsi;
 269         u32 type;
 270         int (*set)(struct kvm_kernel_irq_routing_entry *e,
 271                    struct kvm *kvm, int irq_source_id, int level);
 272         union {
 273                 struct {
 274                         unsigned irqchip;
 275                         unsigned pin;
 276                 } irqchip;
 277                 struct msi_msg msi;
 278         };
 279         struct hlist_node link;
 280 };
 281
 282 #ifdef __KVM_HAVE_IOAPIC
 283
 284 struct kvm_irq_routing_table {
 285         int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
 286         struct kvm_kernel_irq_routing_entry *rt_entries;
 287         u32 nr_rt_entries;
 288         /*
 289          * Array indexed by gsi. Each entry contains list of irq chips
 290          * the gsi is connected to.
 291          */
 292         struct hlist_head map[0];
 293 };
 294
 295 #else
 296
 297 struct kvm_irq_routing_table {};
 298
 299 #endif
 300
 301 #ifndef KVM_MEM_SLOTS_NUM
 302 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
 303 #endif
 304
 305 /*
 306  * Note:
 307  * memslots are not sorted by id anymore, please use id_to_memslot()
 308  * to get the memslot by its id.
 309  */
 310 struct kvm_memslots {
 311         u64 generation;
 312         struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
 313         /* The mapping table from slot id to the index in memslots[]. */
 314         int id_to_index[KVM_MEM_SLOTS_NUM];
 315 };
 316
 317 struct kvm {
 318         spinlock_t mmu_lock;
 319         struct mutex slots_lock;
 320         struct mm_struct *mm; /* userspace tied to this vm */
 321         struct kvm_memslots *memslots;
 322         struct srcu_struct srcu;
 323 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 324         u32 bsp_vcpu_id;
 325 #endif
 326         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 327         atomic_t online_vcpus;
 328         int last_boosted_vcpu;
 329         struct list_head vm_list;
 330         struct mutex lock;
 331         struct kvm_io_bus *buses[KVM_NR_BUSES];
 332 #ifdef CONFIG_HAVE_KVM_EVENTFD
 333         struct {
 334                 spinlock_t        lock;
 335                 struct list_head  items;
 336                 struct list_head  resampler_list;
 337                 struct mutex      resampler_lock;
 338         } irqfds;
 339         struct list_head ioeventfds;
 340 #endif
 341         struct kvm_vm_stat stat;
 342         struct kvm_arch arch;
 343         atomic_t users_count;
 344 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 345         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 346         spinlock_t ring_lock;
 347         struct list_head coalesced_zones;
 348 #endif
 349
 350         struct mutex irq_lock;
 351 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 352         /*
 353          * Update side is protected by irq_lock and,
 354          * if configured, irqfds.lock.
 355          */
 356         struct kvm_irq_routing_table __rcu *irq_routing;
 357         struct hlist_head mask_notifier_list;
 358         struct hlist_head irq_ack_notifier_list;
 359 #endif
 360
 361 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 362         struct mmu_notifier mmu_notifier;
 363         unsigned long mmu_notifier_seq;
 364         long mmu_notifier_count;
 365 #endif
 366         long tlbs_dirty;
 367 };
 368
 369 #define kvm_err(fmt, ...) \
 370         pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
 371 #define kvm_info(fmt, ...) \
 372         pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
 373 #define kvm_debug(fmt, ...) \
 374         pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
 375 #define kvm_pr_unimpl(fmt, ...) \
 376         pr_err_ratelimited("kvm [%i]: " fmt, \
 377                            task_tgid_nr(current), ## __VA_ARGS__)
 378
 379 /* The guest did something we don't support. */
 380 #define vcpu_unimpl(vcpu, fmt, ...)                                     \
 381         kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
 382
 383 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 384 {
 385         smp_rmb();
 386         return kvm->vcpus[i];
 387 }
 388
 389 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
 390         for (idx = 0; \
 391              idx < atomic_read(&kvm->online_vcpus) && \
 392              (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
 393              idx++)
 394
 395 #define kvm_for_each_memslot(memslot, slots)    \
 396         for (memslot = &slots->memslots[0];     \
 397               memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
 398                 memslot++)
 399
 400 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 401 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 402
 403 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
 404 void vcpu_put(struct kvm_vcpu *vcpu);
 405
 406 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
 407                   struct module *module);
 408 void kvm_exit(void);
 409
 410 void kvm_get_kvm(struct kvm *kvm);
 411 void kvm_put_kvm(struct kvm *kvm);
 412 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
 413
 414 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
 415 {
 416         return rcu_dereference_check(kvm->memslots,
 417                         srcu_read_lock_held(&kvm->srcu)
 418                         || lockdep_is_held(&kvm->slots_lock));
 419 }
 420
 421 static inline struct kvm_memory_slot *
 422 id_to_memslot(struct kvm_memslots *slots, int id)
 423 {
 424         int index = slots->id_to_index[id];
 425         struct kvm_memory_slot *slot;
 426
 427         slot = &slots->memslots[index];
 428
 429         WARN_ON(slot->id != id);
 430         return slot;
 431 }
 432
 433 int kvm_set_memory_region(struct kvm *kvm,
 434                           struct kvm_userspace_memory_region *mem,
 435                           int user_alloc);
 436 int __kvm_set_memory_region(struct kvm *kvm,
 437                             struct kvm_userspace_memory_region *mem,
 438                             int user_alloc);
 439 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
 440                            struct kvm_memory_slot *dont);
 441 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
 442 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 443                                 struct kvm_memory_slot *memslot,
 444                                 struct kvm_memory_slot old,
 445                                 struct kvm_userspace_memory_region *mem,
 446                                 int user_alloc);
 447 void kvm_arch_commit_memory_region(struct kvm *kvm,
 448                                 struct kvm_userspace_memory_region *mem,
 449                                 struct kvm_memory_slot old,
 450                                 int user_alloc);
 451 bool kvm_largepages_enabled(void);
 452 void kvm_disable_largepages(void);
 453 /* flush all memory translations */
 454 void kvm_arch_flush_shadow_all(struct kvm *kvm);
 455 /* flush memory translations pointing to 'slot' */
 456 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 457                                    struct kvm_memory_slot *slot);
 458
 459 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
 460                             int nr_pages);
 461
 462 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 463 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 464 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
 465 void kvm_release_page_clean(struct page *page);
 466 void kvm_release_page_dirty(struct page *page);
 467 void kvm_set_page_dirty(struct page *page);
 468 void kvm_set_page_accessed(struct page *page);
 469
 470 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
 471 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
 472                        bool write_fault, bool *writable);
 473 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 474 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
 475                       bool *writable);
 476 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
 477 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
 478
 479 void kvm_release_pfn_dirty(pfn_t pfn);
 480 void kvm_release_pfn_clean(pfn_t pfn);
 481 void kvm_set_pfn_dirty(pfn_t pfn);
 482 void kvm_set_pfn_accessed(pfn_t pfn);
 483 void kvm_get_pfn(pfn_t pfn);
 484
 485 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 486                         int len);
 487 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 488                           unsigned long len);
 489 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 490 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 491                            void *data, unsigned long len);
 492 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 493                          int offset, int len);
 494 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 495                     unsigned long len);
 496 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 497                            void *data, unsigned long len);
 498 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 499                               gpa_t gpa);
 500 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 501 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 502 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 503 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 504 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
 505 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 506 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
 507                              gfn_t gfn);
 508
 509 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 510 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 511 bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
 512 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
 513 void kvm_resched(struct kvm_vcpu *vcpu);
 514 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 515 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 516
 517 void kvm_flush_remote_tlbs(struct kvm *kvm);
 518 void kvm_reload_remote_mmus(struct kvm *kvm);
 519
 520 long kvm_arch_dev_ioctl(struct file *filp,
 521                         unsigned int ioctl, unsigned long arg);
 522 long kvm_arch_vcpu_ioctl(struct file *filp,
 523                          unsigned int ioctl, unsigned long arg);
 524 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
 525
 526 int kvm_dev_ioctl_check_extension(long ext);
 527
 528 int kvm_get_dirty_log(struct kvm *kvm,
 529                         struct kvm_dirty_log *log, int *is_dirty);
 530 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 531                                 struct kvm_dirty_log *log);
 532
 533 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 534                                    struct
 535                                    kvm_userspace_memory_region *mem,
 536                                    int user_alloc);
 537 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level);
 538 long kvm_arch_vm_ioctl(struct file *filp,
 539                        unsigned int ioctl, unsigned long arg);
 540
 541 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 542 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 543
 544 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 545                                     struct kvm_translation *tr);
 546
 547 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 548 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 549 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 550                                   struct kvm_sregs *sregs);
 551 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 552                                   struct kvm_sregs *sregs);
 553 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 554                                     struct kvm_mp_state *mp_state);
 555 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 556                                     struct kvm_mp_state *mp_state);
 557 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 558                                         struct kvm_guest_debug *dbg);
 559 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 560
 561 int kvm_arch_init(void *opaque);
 562 void kvm_arch_exit(void);
 563
 564 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 565 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 566
 567 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 568 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 569 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 570 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 571 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 572 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 573
 574 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 575 int kvm_arch_hardware_enable(void *garbage);
 576 void kvm_arch_hardware_disable(void *garbage);
 577 int kvm_arch_hardware_setup(void);
 578 void kvm_arch_hardware_unsetup(void);
 579 void kvm_arch_check_processor_compat(void *rtn);
 580 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 581 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
 582
 583 void kvm_free_physmem(struct kvm *kvm);
 584
 585 void *kvm_kvzalloc(unsigned long size);
 586 void kvm_kvfree(const void *addr);
 587
 588 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
 589 static inline struct kvm *kvm_arch_alloc_vm(void)
 590 {
 591         return kzalloc(sizeof(struct kvm), GFP_KERNEL);
 592 }
 593
 594 static inline void kvm_arch_free_vm(struct kvm *kvm)
 595 {
 596         kfree(kvm);
 597 }
 598 #endif
 599
 600 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
 601 {
 602 #ifdef __KVM_HAVE_ARCH_WQP
 603         return vcpu->arch.wqp;
 604 #else
 605         return &vcpu->wq;
 606 #endif
 607 }
 608
 609 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
 610 void kvm_arch_destroy_vm(struct kvm *kvm);
 611 void kvm_free_all_assigned_devices(struct kvm *kvm);
 612 void kvm_arch_sync_events(struct kvm *kvm);
 613
 614 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 615 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 616
 617 bool kvm_is_mmio_pfn(pfn_t pfn);
 618
 619 struct kvm_irq_ack_notifier {
 620         struct hlist_node link;
 621         unsigned gsi;
 622         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 623 };
 624
 625 struct kvm_assigned_dev_kernel {
 626         struct kvm_irq_ack_notifier ack_notifier;
 627         struct list_head list;
 628         int assigned_dev_id;
 629         int host_segnr;
 630         int host_busnr;
 631         int host_devfn;
 632         unsigned int entries_nr;
 633         int host_irq;
 634         bool host_irq_disabled;
 635         bool pci_2_3;
 636         struct msix_entry *host_msix_entries;
 637         int guest_irq;
 638         struct msix_entry *guest_msix_entries;
 639         unsigned long irq_requested_type;
 640         int irq_source_id;
 641         int flags;
 642         struct pci_dev *dev;
 643         struct kvm *kvm;
 644         spinlock_t intx_lock;
 645         spinlock_t intx_mask_lock;
 646         char irq_name[32];
 647         struct pci_saved_state *pci_saved_state;
 648 };
 649
 650 struct kvm_irq_mask_notifier {
 651         void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 652         int irq;
 653         struct hlist_node link;
 654 };
 655
 656 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 657                                     struct kvm_irq_mask_notifier *kimn);
 658 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 659                                       struct kvm_irq_mask_notifier *kimn);
 660 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
 661                              bool mask);
 662
 663 #ifdef __KVM_HAVE_IOAPIC
 664 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
 665                                    union kvm_ioapic_redirect_entry *entry,
 666                                    unsigned long *deliver_bitmask);
 667 #endif
 668 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 669 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
 670                 int irq_source_id, int level);
 671 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 672 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 673                                    struct kvm_irq_ack_notifier *kian);
 674 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 675                                    struct kvm_irq_ack_notifier *kian);
 676 int kvm_request_irq_source_id(struct kvm *kvm);
 677 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 678
 679 /* For vcpu->arch.iommu_flags */
 680 #define KVM_IOMMU_CACHE_COHERENCY       0x1
 681
 682 #ifdef CONFIG_IOMMU_API
 683 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 684 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 685 int kvm_iommu_map_guest(struct kvm *kvm);
 686 int kvm_iommu_unmap_guest(struct kvm *kvm);
 687 int kvm_assign_device(struct kvm *kvm,
 688                       struct kvm_assigned_dev_kernel *assigned_dev);
 689 int kvm_deassign_device(struct kvm *kvm,
 690                         struct kvm_assigned_dev_kernel *assigned_dev);
 691 #else /* CONFIG_IOMMU_API */
 692 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 693                                       struct kvm_memory_slot *slot)
 694 {
 695         return 0;
 696 }
 697
 698 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
 699                                          struct kvm_memory_slot *slot)
 700 {
 701 }
 702
 703 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 704 {
 705         return -ENODEV;
 706 }
 707
 708 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 709 {
 710         return 0;
 711 }
 712
 713 static inline int kvm_assign_device(struct kvm *kvm,
 714                 struct kvm_assigned_dev_kernel *assigned_dev)
 715 {
 716         return 0;
 717 }
 718
 719 static inline int kvm_deassign_device(struct kvm *kvm,
 720                 struct kvm_assigned_dev_kernel *assigned_dev)
 721 {
 722         return 0;
 723 }
 724 #endif /* CONFIG_IOMMU_API */
 725
 726 static inline void kvm_guest_enter(void)
 727 {
 728         BUG_ON(preemptible());
 729         vtime_account(current);
 730         current->flags |= PF_VCPU;
 731         /* KVM does not hold any references to rcu protected data when it
 732          * switches CPU into a guest mode. In fact switching to a guest mode
 733          * is very similar to exiting to userspase from rcu point of view. In
 734          * addition CPU may stay in a guest mode for quite a long time (up to
 735          * one time slice). Lets treat guest mode as quiescent state, just like
 736          * we do with user-mode execution.
 737          */
 738         rcu_virt_note_context_switch(smp_processor_id());
 739 }
 740
 741 static inline void kvm_guest_exit(void)
 742 {
 743         vtime_account(current);
 744         current->flags &= ~PF_VCPU;
 745 }
 746
 747 /*
 748  * search_memslots() and __gfn_to_memslot() are here because they are
 749  * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
 750  * gfn_to_memslot() itself isn't here as an inline because that would
 751  * bloat other code too much.
 752  */
 753 static inline struct kvm_memory_slot *
 754 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
 755 {
 756         struct kvm_memory_slot *memslot;
 757
 758         kvm_for_each_memslot(memslot, slots)
 759                 if (gfn >= memslot->base_gfn &&
 760                       gfn < memslot->base_gfn + memslot->npages)
 761                         return memslot;
 762
 763         return NULL;
 764 }
 765
 766 static inline struct kvm_memory_slot *
 767 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
 768 {
 769         return search_memslots(slots, gfn);
 770 }
 771
 772 static inline unsigned long
 773 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
 774 {
 775         return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
 776 }
 777
 778 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
 779 {
 780         return gfn_to_memslot(kvm, gfn)->id;
 781 }
 782
 783 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
 784 {
 785         /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
 786         return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
 787                 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
 788 }
 789
 790 static inline gfn_t
 791 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
 792 {
 793         gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
 794
 795         return slot->base_gfn + gfn_offset;
 796 }
 797
 798 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 799 {
 800         return (gpa_t)gfn << PAGE_SHIFT;
 801 }
 802
 803 static inline gfn_t gpa_to_gfn(gpa_t gpa)
 804 {
 805         return (gfn_t)(gpa >> PAGE_SHIFT);
 806 }
 807
 808 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 809 {
 810         return (hpa_t)pfn << PAGE_SHIFT;
 811 }
 812
 813 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 814 {
 815         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 816 }
 817
 818 enum kvm_stat_kind {
 819         KVM_STAT_VM,
 820         KVM_STAT_VCPU,
 821 };
 822
 823 struct kvm_stats_debugfs_item {
 824         const char *name;
 825         int offset;
 826         enum kvm_stat_kind kind;
 827         struct dentry *dentry;
 828 };
 829 extern struct kvm_stats_debugfs_item debugfs_entries[];
 830 extern struct dentry *kvm_debugfs_dir;
 831
 832 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 833 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 834 {
 835         if (unlikely(vcpu->kvm->mmu_notifier_count))
 836                 return 1;
 837         /*
 838          * Ensure the read of mmu_notifier_count happens before the read
 839          * of mmu_notifier_seq.  This interacts with the smp_wmb() in
 840          * mmu_notifier_invalidate_range_end to make sure that the caller
 841          * either sees the old (non-zero) value of mmu_notifier_count or
 842          * the new (incremented) value of mmu_notifier_seq.
 843          * PowerPC Book3s HV KVM calls this under a per-page lock
 844          * rather than under kvm->mmu_lock, for scalability, so
 845          * can't rely on kvm->mmu_lock to keep things ordered.
 846          */
 847         smp_rmb();
 848         if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 849                 return 1;
 850         return 0;
 851 }
 852 #endif
 853
 854 #ifdef KVM_CAP_IRQ_ROUTING
 855
 856 #define KVM_MAX_IRQ_ROUTES 1024
 857
 858 int kvm_setup_default_irq_routing(struct kvm *kvm);
 859 int kvm_set_irq_routing(struct kvm *kvm,
 860                         const struct kvm_irq_routing_entry *entries,
 861                         unsigned nr,
 862                         unsigned flags);
 863 void kvm_free_irq_routing(struct kvm *kvm);
 864
 865 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
 866
 867 #else
 868
 869 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 870
 871 #endif
 872
 873 #ifdef CONFIG_HAVE_KVM_EVENTFD
 874
 875 void kvm_eventfd_init(struct kvm *kvm);
 876 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
 877 void kvm_irqfd_release(struct kvm *kvm);
 878 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
 879 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 880
 881 #else
 882
 883 static inline void kvm_eventfd_init(struct kvm *kvm) {}
 884
 885 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
 886 {
 887         return -EINVAL;
 888 }
 889
 890 static inline void kvm_irqfd_release(struct kvm *kvm) {}
 891
 892 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 893 static inline void kvm_irq_routing_update(struct kvm *kvm,
 894                                           struct kvm_irq_routing_table *irq_rt)
 895 {
 896         rcu_assign_pointer(kvm->irq_routing, irq_rt);
 897 }
 898 #endif
 899
 900 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
 901 {
 902         return -ENOSYS;
 903 }
 904
 905 #endif /* CONFIG_HAVE_KVM_EVENTFD */
 906
 907 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 908 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
 909 {
 910         return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
 911 }
 912
 913 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
 914
 915 #else
 916
 917 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
 918
 919 #endif
 920
 921 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
 922
 923 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 924                                   unsigned long arg);
 925
 926 #else
 927
 928 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 929                                                 unsigned long arg)
 930 {
 931         return -ENOTTY;
 932 }
 933
 934 #endif
 935
 936 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
 937 {
 938         set_bit(req, &vcpu->requests);
 939 }
 940
 941 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
 942 {
 943         if (test_bit(req, &vcpu->requests)) {
 944                 clear_bit(req, &vcpu->requests);
 945                 return true;
 946         } else {
 947                 return false;
 948         }
 949 }
 950
 951 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
 952
 953 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
 954 {
 955         vcpu->spin_loop.in_spin_loop = val;
 956 }
 957 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
 958 {
 959         vcpu->spin_loop.dy_eligible = val;
 960 }
 961
 962 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
 963
 964 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
 965 {
 966 }
 967
 968 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
 969 {
 970 }
 971
 972 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
 973 {
 974         return true;
 975 }
 976
 977 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
 978 #endif
 979