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 <linux/irqflags.h>
  26 #include <linux/context_tracking.h>
  27 #include <asm/signal.h>
  28
  29 #include <linux/kvm.h>
  30 #include <linux/kvm_para.h>
  31
  32 #include <linux/kvm_types.h>
  33
  34 #include <asm/kvm_host.h>
  35
  36 /*
  37  * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
  38  * in kvm, other bits are visible for userspace which are defined in
  39  * include/linux/kvm_h.
  40  */
  41 #define KVM_MEMSLOT_INVALID     (1UL << 16)
  42 #define KVM_MEMSLOT_INCOHERENT  (1UL << 17)
  43
  44 /* Two fragments for cross MMIO pages. */
  45 #define KVM_MAX_MMIO_FRAGMENTS  2
  46
  47 #ifndef KVM_ADDRESS_SPACE_NUM
  48 #define KVM_ADDRESS_SPACE_NUM   1
  49 #endif
  50
  51 /*
  52  * For the normal pfn, the highest 12 bits should be zero,
  53  * so we can mask bit 62 ~ bit 52  to indicate the error pfn,
  54  * mask bit 63 to indicate the noslot pfn.
  55  */
  56 #define KVM_PFN_ERR_MASK        (0x7ffULL << 52)
  57 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
  58 #define KVM_PFN_NOSLOT          (0x1ULL << 63)
  59
  60 #define KVM_PFN_ERR_FAULT       (KVM_PFN_ERR_MASK)
  61 #define KVM_PFN_ERR_HWPOISON    (KVM_PFN_ERR_MASK + 1)
  62 #define KVM_PFN_ERR_RO_FAULT    (KVM_PFN_ERR_MASK + 2)
  63
  64 /*
  65  * error pfns indicate that the gfn is in slot but faild to
  66  * translate it to pfn on host.
  67  */
  68 static inline bool is_error_pfn(pfn_t pfn)
  69 {
  70         return !!(pfn & KVM_PFN_ERR_MASK);
  71 }
  72
  73 /*
  74  * error_noslot pfns indicate that the gfn can not be
  75  * translated to pfn - it is not in slot or failed to
  76  * translate it to pfn.
  77  */
  78 static inline bool is_error_noslot_pfn(pfn_t pfn)
  79 {
  80         return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
  81 }
  82
  83 /* noslot pfn indicates that the gfn is not in slot. */
  84 static inline bool is_noslot_pfn(pfn_t pfn)
  85 {
  86         return pfn == KVM_PFN_NOSLOT;
  87 }
  88
  89 /*
  90  * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390)
  91  * provide own defines and kvm_is_error_hva
  92  */
  93 #ifndef KVM_HVA_ERR_BAD
  94
  95 #define KVM_HVA_ERR_BAD         (PAGE_OFFSET)
  96 #define KVM_HVA_ERR_RO_BAD      (PAGE_OFFSET + PAGE_SIZE)
  97
  98 static inline bool kvm_is_error_hva(unsigned long addr)
  99 {
 100         return addr >= PAGE_OFFSET;
 101 }
 102
 103 #endif
 104
 105 #define KVM_ERR_PTR_BAD_PAGE    (ERR_PTR(-ENOENT))
 106
 107 static inline bool is_error_page(struct page *page)
 108 {
 109         return IS_ERR(page);
 110 }
 111
 112 /*
 113  * vcpu->requests bit members
 114  */
 115 #define KVM_REQ_TLB_FLUSH          0
 116 #define KVM_REQ_MIGRATE_TIMER      1
 117 #define KVM_REQ_REPORT_TPR_ACCESS  2
 118 #define KVM_REQ_MMU_RELOAD         3
 119 #define KVM_REQ_TRIPLE_FAULT       4
 120 #define KVM_REQ_PENDING_TIMER      5
 121 #define KVM_REQ_UNHALT             6
 122 #define KVM_REQ_MMU_SYNC           7
 123 #define KVM_REQ_CLOCK_UPDATE       8
 124 #define KVM_REQ_KICK               9
 125 #define KVM_REQ_DEACTIVATE_FPU    10
 126 #define KVM_REQ_EVENT             11
 127 #define KVM_REQ_APF_HALT          12
 128 #define KVM_REQ_STEAL_UPDATE      13
 129 #define KVM_REQ_NMI               14
 130 #define KVM_REQ_PMU               15
 131 #define KVM_REQ_PMI               16
 132 #define KVM_REQ_WATCHDOG          17
 133 #define KVM_REQ_MASTERCLOCK_UPDATE 18
 134 #define KVM_REQ_MCLOCK_INPROGRESS 19
 135 #define KVM_REQ_EPR_EXIT          20
 136 #define KVM_REQ_SCAN_IOAPIC       21
 137 #define KVM_REQ_GLOBAL_CLOCK_UPDATE 22
 138 #define KVM_REQ_ENABLE_IBS        23
 139 #define KVM_REQ_DISABLE_IBS       24
 140 #define KVM_REQ_APIC_PAGE_RELOAD  25
 141 #define KVM_REQ_SMI               26
 142 #define KVM_REQ_HV_CRASH          27
 143
 144 #define KVM_USERSPACE_IRQ_SOURCE_ID             0
 145 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID        1
 146
 147 extern struct kmem_cache *kvm_vcpu_cache;
 148
 149 extern spinlock_t kvm_lock;
 150 extern struct list_head vm_list;
 151
 152 struct kvm_io_range {
 153         gpa_t addr;
 154         int len;
 155         struct kvm_io_device *dev;
 156 };
 157
 158 #define NR_IOBUS_DEVS 1000
 159
 160 struct kvm_io_bus {
 161         int dev_count;
 162         int ioeventfd_count;
 163         struct kvm_io_range range[];
 164 };
 165
 166 enum kvm_bus {
 167         KVM_MMIO_BUS,
 168         KVM_PIO_BUS,
 169         KVM_VIRTIO_CCW_NOTIFY_BUS,
 170         KVM_FAST_MMIO_BUS,
 171         KVM_NR_BUSES
 172 };
 173
 174 int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
 175                      int len, const void *val);
 176 int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
 177                             gpa_t addr, int len, const void *val, long cookie);
 178 int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
 179                     int len, void *val);
 180 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
 181                             int len, struct kvm_io_device *dev);
 182 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
 183                               struct kvm_io_device *dev);
 184
 185 #ifdef CONFIG_KVM_ASYNC_PF
 186 struct kvm_async_pf {
 187         struct work_struct work;
 188         struct list_head link;
 189         struct list_head queue;
 190         struct kvm_vcpu *vcpu;
 191         struct mm_struct *mm;
 192         gva_t gva;
 193         unsigned long addr;
 194         struct kvm_arch_async_pf arch;
 195         bool   wakeup_all;
 196 };
 197
 198 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
 199 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
 200 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva,
 201                        struct kvm_arch_async_pf *arch);
 202 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
 203 #endif
 204
 205 enum {
 206         OUTSIDE_GUEST_MODE,
 207         IN_GUEST_MODE,
 208         EXITING_GUEST_MODE,
 209         READING_SHADOW_PAGE_TABLES,
 210 };
 211
 212 /*
 213  * Sometimes a large or cross-page mmio needs to be broken up into separate
 214  * exits for userspace servicing.
 215  */
 216 struct kvm_mmio_fragment {
 217         gpa_t gpa;
 218         void *data;
 219         unsigned len;
 220 };
 221
 222 struct kvm_vcpu {
 223         struct kvm *kvm;
 224 #ifdef CONFIG_PREEMPT_NOTIFIERS
 225         struct preempt_notifier preempt_notifier;
 226 #endif
 227         int cpu;
 228         int vcpu_id;
 229         int srcu_idx;
 230         int mode;
 231         unsigned long requests;
 232         unsigned long guest_debug;
 233
 234         struct mutex mutex;
 235         struct kvm_run *run;
 236
 237         int fpu_active;
 238         int guest_fpu_loaded, guest_xcr0_loaded;
 239         unsigned char fpu_counter;
 240         wait_queue_head_t wq;
 241         struct pid *pid;
 242         int sigset_active;
 243         sigset_t sigset;
 244         struct kvm_vcpu_stat stat;
 245         unsigned int halt_poll_ns;
 246
 247 #ifdef CONFIG_HAS_IOMEM
 248         int mmio_needed;
 249         int mmio_read_completed;
 250         int mmio_is_write;
 251         int mmio_cur_fragment;
 252         int mmio_nr_fragments;
 253         struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
 254 #endif
 255
 256 #ifdef CONFIG_KVM_ASYNC_PF
 257         struct {
 258                 u32 queued;
 259                 struct list_head queue;
 260                 struct list_head done;
 261                 spinlock_t lock;
 262         } async_pf;
 263 #endif
 264
 265 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
 266         /*
 267          * Cpu relax intercept or pause loop exit optimization
 268          * in_spin_loop: set when a vcpu does a pause loop exit
 269          *  or cpu relax intercepted.
 270          * dy_eligible: indicates whether vcpu is eligible for directed yield.
 271          */
 272         struct {
 273                 bool in_spin_loop;
 274                 bool dy_eligible;
 275         } spin_loop;
 276 #endif
 277         bool preempted;
 278         struct kvm_vcpu_arch arch;
 279 };
 280
 281 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
 282 {
 283         return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
 284 }
 285
 286 /*
 287  * Some of the bitops functions do not support too long bitmaps.
 288  * This number must be determined not to exceed such limits.
 289  */
 290 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
 291
 292 struct kvm_memory_slot {
 293         gfn_t base_gfn;
 294         unsigned long npages;
 295         unsigned long *dirty_bitmap;
 296         struct kvm_arch_memory_slot arch;
 297         unsigned long userspace_addr;
 298         u32 flags;
 299         short id;
 300 };
 301
 302 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
 303 {
 304         return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
 305 }
 306
 307 struct kvm_s390_adapter_int {
 308         u64 ind_addr;
 309         u64 summary_addr;
 310         u64 ind_offset;
 311         u32 summary_offset;
 312         u32 adapter_id;
 313 };
 314
 315 struct kvm_kernel_irq_routing_entry {
 316         u32 gsi;
 317         u32 type;
 318         int (*set)(struct kvm_kernel_irq_routing_entry *e,
 319                    struct kvm *kvm, int irq_source_id, int level,
 320                    bool line_status);
 321         union {
 322                 struct {
 323                         unsigned irqchip;
 324                         unsigned pin;
 325                 } irqchip;
 326                 struct msi_msg msi;
 327                 struct kvm_s390_adapter_int adapter;
 328         };
 329         struct hlist_node link;
 330 };
 331
 332 #ifndef KVM_PRIVATE_MEM_SLOTS
 333 #define KVM_PRIVATE_MEM_SLOTS 0
 334 #endif
 335
 336 #ifndef KVM_MEM_SLOTS_NUM
 337 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
 338 #endif
 339
 340 #ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
 341 static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
 342 {
 343         return 0;
 344 }
 345 #endif
 346
 347 /*
 348  * Note:
 349  * memslots are not sorted by id anymore, please use id_to_memslot()
 350  * to get the memslot by its id.
 351  */
 352 struct kvm_memslots {
 353         u64 generation;
 354         struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
 355         /* The mapping table from slot id to the index in memslots[]. */
 356         short id_to_index[KVM_MEM_SLOTS_NUM];
 357         atomic_t lru_slot;
 358         int used_slots;
 359 };
 360
 361 struct kvm {
 362         spinlock_t mmu_lock;
 363         struct mutex slots_lock;
 364         struct mm_struct *mm; /* userspace tied to this vm */
 365         struct kvm_memslots *memslots[KVM_ADDRESS_SPACE_NUM];
 366         struct srcu_struct srcu;
 367         struct srcu_struct irq_srcu;
 368         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 369         atomic_t online_vcpus;
 370         int last_boosted_vcpu;
 371         struct list_head vm_list;
 372         struct mutex lock;
 373         struct kvm_io_bus *buses[KVM_NR_BUSES];
 374 #ifdef CONFIG_HAVE_KVM_EVENTFD
 375         struct {
 376                 spinlock_t        lock;
 377                 struct list_head  items;
 378                 struct list_head  resampler_list;
 379                 struct mutex      resampler_lock;
 380         } irqfds;
 381         struct list_head ioeventfds;
 382 #endif
 383         struct kvm_vm_stat stat;
 384         struct kvm_arch arch;
 385         atomic_t users_count;
 386 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 387         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 388         spinlock_t ring_lock;
 389         struct list_head coalesced_zones;
 390 #endif
 391
 392         struct mutex irq_lock;
 393 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 394         /*
 395          * Update side is protected by irq_lock.
 396          */
 397         struct kvm_irq_routing_table __rcu *irq_routing;
 398 #endif
 399 #ifdef CONFIG_HAVE_KVM_IRQFD
 400         struct hlist_head irq_ack_notifier_list;
 401 #endif
 402
 403 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 404         struct mmu_notifier mmu_notifier;
 405         unsigned long mmu_notifier_seq;
 406         long mmu_notifier_count;
 407 #endif
 408         long tlbs_dirty;
 409         struct list_head devices;
 410 };
 411
 412 #define kvm_err(fmt, ...) \
 413         pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
 414 #define kvm_info(fmt, ...) \
 415         pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
 416 #define kvm_debug(fmt, ...) \
 417         pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
 418 #define kvm_pr_unimpl(fmt, ...) \
 419         pr_err_ratelimited("kvm [%i]: " fmt, \
 420                            task_tgid_nr(current), ## __VA_ARGS__)
 421
 422 /* The guest did something we don't support. */
 423 #define vcpu_unimpl(vcpu, fmt, ...)                                     \
 424         kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
 425
 426 #define vcpu_debug(vcpu, fmt, ...)                                      \
 427         kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
 428
 429 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 430 {
 431         /* Pairs with smp_wmb() in kvm_vm_ioctl_create_vcpu, in case
 432          * the caller has read kvm->online_vcpus before (as is the case
 433          * for kvm_for_each_vcpu, for example).
 434          */
 435         smp_rmb();
 436         return kvm->vcpus[i];
 437 }
 438
 439 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
 440         for (idx = 0; \
 441              idx < atomic_read(&kvm->online_vcpus) && \
 442              (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
 443              idx++)
 444
 445 #define kvm_for_each_memslot(memslot, slots)    \
 446         for (memslot = &slots->memslots[0];     \
 447               memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
 448                 memslot++)
 449
 450 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 451 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 452
 453 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
 454 void vcpu_put(struct kvm_vcpu *vcpu);
 455
 456 #ifdef __KVM_HAVE_IOAPIC
 457 void kvm_vcpu_request_scan_ioapic(struct kvm *kvm);
 458 #else
 459 static inline void kvm_vcpu_request_scan_ioapic(struct kvm *kvm)
 460 {
 461 }
 462 #endif
 463
 464 #ifdef CONFIG_HAVE_KVM_IRQFD
 465 int kvm_irqfd_init(void);
 466 void kvm_irqfd_exit(void);
 467 #else
 468 static inline int kvm_irqfd_init(void)
 469 {
 470         return 0;
 471 }
 472
 473 static inline void kvm_irqfd_exit(void)
 474 {
 475 }
 476 #endif
 477 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
 478                   struct module *module);
 479 void kvm_exit(void);
 480
 481 void kvm_get_kvm(struct kvm *kvm);
 482 void kvm_put_kvm(struct kvm *kvm);
 483
 484 static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)
 485 {
 486         return rcu_dereference_check(kvm->memslots[as_id],
 487                         srcu_read_lock_held(&kvm->srcu)
 488                         || lockdep_is_held(&kvm->slots_lock));
 489 }
 490
 491 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
 492 {
 493         return __kvm_memslots(kvm, 0);
 494 }
 495
 496 static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu)
 497 {
 498         int as_id = kvm_arch_vcpu_memslots_id(vcpu);
 499
 500         return __kvm_memslots(vcpu->kvm, as_id);
 501 }
 502
 503 static inline struct kvm_memory_slot *
 504 id_to_memslot(struct kvm_memslots *slots, int id)
 505 {
 506         int index = slots->id_to_index[id];
 507         struct kvm_memory_slot *slot;
 508
 509         slot = &slots->memslots[index];
 510
 511         WARN_ON(slot->id != id);
 512         return slot;
 513 }
 514
 515 /*
 516  * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
 517  * - create a new memory slot
 518  * - delete an existing memory slot
 519  * - modify an existing memory slot
 520  *   -- move it in the guest physical memory space
 521  *   -- just change its flags
 522  *
 523  * Since flags can be changed by some of these operations, the following
 524  * differentiation is the best we can do for __kvm_set_memory_region():
 525  */
 526 enum kvm_mr_change {
 527         KVM_MR_CREATE,
 528         KVM_MR_DELETE,
 529         KVM_MR_MOVE,
 530         KVM_MR_FLAGS_ONLY,
 531 };
 532
 533 int kvm_set_memory_region(struct kvm *kvm,
 534                           const struct kvm_userspace_memory_region *mem);
 535 int __kvm_set_memory_region(struct kvm *kvm,
 536                             const struct kvm_userspace_memory_region *mem);
 537 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 538                            struct kvm_memory_slot *dont);
 539 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 540                             unsigned long npages);
 541 void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots);
 542 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 543                                 struct kvm_memory_slot *memslot,
 544                                 const struct kvm_userspace_memory_region *mem,
 545                                 enum kvm_mr_change change);
 546 void kvm_arch_commit_memory_region(struct kvm *kvm,
 547                                 const struct kvm_userspace_memory_region *mem,
 548                                 const struct kvm_memory_slot *old,
 549                                 const struct kvm_memory_slot *new,
 550                                 enum kvm_mr_change change);
 551 bool kvm_largepages_enabled(void);
 552 void kvm_disable_largepages(void);
 553 /* flush all memory translations */
 554 void kvm_arch_flush_shadow_all(struct kvm *kvm);
 555 /* flush memory translations pointing to 'slot' */
 556 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 557                                    struct kvm_memory_slot *slot);
 558
 559 int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
 560                             struct page **pages, int nr_pages);
 561
 562 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 563 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 564 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
 565 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
 566 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,
 567                                       bool *writable);
 568 void kvm_release_page_clean(struct page *page);
 569 void kvm_release_page_dirty(struct page *page);
 570 void kvm_set_page_accessed(struct page *page);
 571
 572 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
 573 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 574 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
 575                       bool *writable);
 576 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
 577 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
 578 pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn, bool atomic,
 579                            bool *async, bool write_fault, bool *writable);
 580
 581 void kvm_release_pfn_clean(pfn_t pfn);
 582 void kvm_set_pfn_dirty(pfn_t pfn);
 583 void kvm_set_pfn_accessed(pfn_t pfn);
 584 void kvm_get_pfn(pfn_t pfn);
 585
 586 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 587                         int len);
 588 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 589                           unsigned long len);
 590 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 591 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 592                            void *data, unsigned long len);
 593 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 594                          int offset, int len);
 595 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 596                     unsigned long len);
 597 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 598                            void *data, unsigned long len);
 599 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 600                               gpa_t gpa, unsigned long len);
 601 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 602 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 603 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 604 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 605 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
 606 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 607
 608 struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
 609 struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn);
 610 pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn);
 611 pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
 612 struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn);
 613 unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn);
 614 unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable);
 615 int kvm_vcpu_read_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, void *data, int offset,
 616                              int len);
 617 int kvm_vcpu_read_guest_atomic(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
 618                                unsigned long len);
 619 int kvm_vcpu_read_guest(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
 620                         unsigned long len);
 621 int kvm_vcpu_write_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, const void *data,
 622                               int offset, int len);
 623 int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data,
 624                          unsigned long len);
 625 void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn);
 626
 627 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 628 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 629 int kvm_vcpu_yield_to(struct kvm_vcpu *target);
 630 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
 631 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 632 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 633
 634 void kvm_flush_remote_tlbs(struct kvm *kvm);
 635 void kvm_reload_remote_mmus(struct kvm *kvm);
 636 void kvm_make_mclock_inprogress_request(struct kvm *kvm);
 637 void kvm_make_scan_ioapic_request(struct kvm *kvm);
 638 bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
 639
 640 long kvm_arch_dev_ioctl(struct file *filp,
 641                         unsigned int ioctl, unsigned long arg);
 642 long kvm_arch_vcpu_ioctl(struct file *filp,
 643                          unsigned int ioctl, unsigned long arg);
 644 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
 645
 646 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
 647
 648 int kvm_get_dirty_log(struct kvm *kvm,
 649                         struct kvm_dirty_log *log, int *is_dirty);
 650
 651 int kvm_get_dirty_log_protect(struct kvm *kvm,
 652                         struct kvm_dirty_log *log, bool *is_dirty);
 653
 654 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
 655                                         struct kvm_memory_slot *slot,
 656                                         gfn_t gfn_offset,
 657                                         unsigned long mask);
 658
 659 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 660                                 struct kvm_dirty_log *log);
 661
 662 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
 663                         bool line_status);
 664 long kvm_arch_vm_ioctl(struct file *filp,
 665                        unsigned int ioctl, unsigned long arg);
 666
 667 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 668 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 669
 670 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 671                                     struct kvm_translation *tr);
 672
 673 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 674 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 675 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 676                                   struct kvm_sregs *sregs);
 677 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 678                                   struct kvm_sregs *sregs);
 679 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 680                                     struct kvm_mp_state *mp_state);
 681 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 682                                     struct kvm_mp_state *mp_state);
 683 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 684                                         struct kvm_guest_debug *dbg);
 685 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 686
 687 int kvm_arch_init(void *opaque);
 688 void kvm_arch_exit(void);
 689
 690 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 691 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 692
 693 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
 694
 695 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 696 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 697 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 698 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 699 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 700 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
 701 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 702
 703 int kvm_arch_hardware_enable(void);
 704 void kvm_arch_hardware_disable(void);
 705 int kvm_arch_hardware_setup(void);
 706 void kvm_arch_hardware_unsetup(void);
 707 void kvm_arch_check_processor_compat(void *rtn);
 708 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 709 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
 710
 711 void *kvm_kvzalloc(unsigned long size);
 712
 713 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
 714 static inline struct kvm *kvm_arch_alloc_vm(void)
 715 {
 716         return kzalloc(sizeof(struct kvm), GFP_KERNEL);
 717 }
 718
 719 static inline void kvm_arch_free_vm(struct kvm *kvm)
 720 {
 721         kfree(kvm);
 722 }
 723 #endif
 724
 725 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
 726 void kvm_arch_register_noncoherent_dma(struct kvm *kvm);
 727 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm);
 728 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm);
 729 #else
 730 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm)
 731 {
 732 }
 733
 734 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm)
 735 {
 736 }
 737
 738 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
 739 {
 740         return false;
 741 }
 742 #endif
 743 #ifdef __KVM_HAVE_ARCH_ASSIGNED_DEVICE
 744 void kvm_arch_start_assignment(struct kvm *kvm);
 745 void kvm_arch_end_assignment(struct kvm *kvm);
 746 bool kvm_arch_has_assigned_device(struct kvm *kvm);
 747 #else
 748 static inline void kvm_arch_start_assignment(struct kvm *kvm)
 749 {
 750 }
 751
 752 static inline void kvm_arch_end_assignment(struct kvm *kvm)
 753 {
 754 }
 755
 756 static inline bool kvm_arch_has_assigned_device(struct kvm *kvm)
 757 {
 758         return false;
 759 }
 760 #endif
 761
 762 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
 763 {
 764 #ifdef __KVM_HAVE_ARCH_WQP
 765         return vcpu->arch.wqp;
 766 #else
 767         return &vcpu->wq;
 768 #endif
 769 }
 770
 771 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
 772 /*
 773  * returns true if the virtual interrupt controller is initialized and
 774  * ready to accept virtual IRQ. On some architectures the virtual interrupt
 775  * controller is dynamically instantiated and this is not always true.
 776  */
 777 bool kvm_arch_intc_initialized(struct kvm *kvm);
 778 #else
 779 static inline bool kvm_arch_intc_initialized(struct kvm *kvm)
 780 {
 781         return true;
 782 }
 783 #endif
 784
 785 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
 786 void kvm_arch_destroy_vm(struct kvm *kvm);
 787 void kvm_arch_sync_events(struct kvm *kvm);
 788
 789 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 790 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 791
 792 bool kvm_is_reserved_pfn(pfn_t pfn);
 793
 794 struct kvm_irq_ack_notifier {
 795         struct hlist_node link;
 796         unsigned gsi;
 797         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 798 };
 799
 800 int kvm_irq_map_gsi(struct kvm *kvm,
 801                     struct kvm_kernel_irq_routing_entry *entries, int gsi);
 802 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
 803
 804 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
 805                 bool line_status);
 806 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 807 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
 808                 int irq_source_id, int level, bool line_status);
 809 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
 810 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 811 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 812                                    struct kvm_irq_ack_notifier *kian);
 813 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 814                                    struct kvm_irq_ack_notifier *kian);
 815 int kvm_request_irq_source_id(struct kvm *kvm);
 816 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 817
 818 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
 819 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 820 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 821 #else
 822 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 823                                       struct kvm_memory_slot *slot)
 824 {
 825         return 0;
 826 }
 827
 828 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
 829                                          struct kvm_memory_slot *slot)
 830 {
 831 }
 832 #endif
 833
 834 /* must be called with irqs disabled */
 835 static inline void __kvm_guest_enter(void)
 836 {
 837         guest_enter();
 838         /* KVM does not hold any references to rcu protected data when it
 839          * switches CPU into a guest mode. In fact switching to a guest mode
 840          * is very similar to exiting to userspace from rcu point of view. In
 841          * addition CPU may stay in a guest mode for quite a long time (up to
 842          * one time slice). Lets treat guest mode as quiescent state, just like
 843          * we do with user-mode execution.
 844          */
 845         if (!context_tracking_cpu_is_enabled())
 846                 rcu_virt_note_context_switch(smp_processor_id());
 847 }
 848
 849 /* must be called with irqs disabled */
 850 static inline void __kvm_guest_exit(void)
 851 {
 852         guest_exit();
 853 }
 854
 855 static inline void kvm_guest_enter(void)
 856 {
 857         unsigned long flags;
 858
 859         local_irq_save(flags);
 860         __kvm_guest_enter();
 861         local_irq_restore(flags);
 862 }
 863
 864 static inline void kvm_guest_exit(void)
 865 {
 866         unsigned long flags;
 867
 868         local_irq_save(flags);
 869         __kvm_guest_exit();
 870         local_irq_restore(flags);
 871 }
 872
 873 /*
 874  * search_memslots() and __gfn_to_memslot() are here because they are
 875  * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
 876  * gfn_to_memslot() itself isn't here as an inline because that would
 877  * bloat other code too much.
 878  */
 879 static inline struct kvm_memory_slot *
 880 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
 881 {
 882         int start = 0, end = slots->used_slots;
 883         int slot = atomic_read(&slots->lru_slot);
 884         struct kvm_memory_slot *memslots = slots->memslots;
 885
 886         if (gfn >= memslots[slot].base_gfn &&
 887             gfn < memslots[slot].base_gfn + memslots[slot].npages)
 888                 return &memslots[slot];
 889
 890         while (start < end) {
 891                 slot = start + (end - start) / 2;
 892
 893                 if (gfn >= memslots[slot].base_gfn)
 894                         end = slot;
 895                 else
 896                         start = slot + 1;
 897         }
 898
 899         if (gfn >= memslots[start].base_gfn &&
 900             gfn < memslots[start].base_gfn + memslots[start].npages) {
 901                 atomic_set(&slots->lru_slot, start);
 902                 return &memslots[start];
 903         }
 904
 905         return NULL;
 906 }
 907
 908 static inline struct kvm_memory_slot *
 909 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
 910 {
 911         return search_memslots(slots, gfn);
 912 }
 913
 914 static inline unsigned long
 915 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
 916 {
 917         return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
 918 }
 919
 920 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
 921 {
 922         return gfn_to_memslot(kvm, gfn)->id;
 923 }
 924
 925 static inline gfn_t
 926 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
 927 {
 928         gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
 929
 930         return slot->base_gfn + gfn_offset;
 931 }
 932
 933 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 934 {
 935         return (gpa_t)gfn << PAGE_SHIFT;
 936 }
 937
 938 static inline gfn_t gpa_to_gfn(gpa_t gpa)
 939 {
 940         return (gfn_t)(gpa >> PAGE_SHIFT);
 941 }
 942
 943 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 944 {
 945         return (hpa_t)pfn << PAGE_SHIFT;
 946 }
 947
 948 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
 949 {
 950         unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
 951
 952         return kvm_is_error_hva(hva);
 953 }
 954
 955 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 956 {
 957         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 958 }
 959
 960 enum kvm_stat_kind {
 961         KVM_STAT_VM,
 962         KVM_STAT_VCPU,
 963 };
 964
 965 struct kvm_stats_debugfs_item {
 966         const char *name;
 967         int offset;
 968         enum kvm_stat_kind kind;
 969         struct dentry *dentry;
 970 };
 971 extern struct kvm_stats_debugfs_item debugfs_entries[];
 972 extern struct dentry *kvm_debugfs_dir;
 973
 974 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 975 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
 976 {
 977         if (unlikely(kvm->mmu_notifier_count))
 978                 return 1;
 979         /*
 980          * Ensure the read of mmu_notifier_count happens before the read
 981          * of mmu_notifier_seq.  This interacts with the smp_wmb() in
 982          * mmu_notifier_invalidate_range_end to make sure that the caller
 983          * either sees the old (non-zero) value of mmu_notifier_count or
 984          * the new (incremented) value of mmu_notifier_seq.
 985          * PowerPC Book3s HV KVM calls this under a per-page lock
 986          * rather than under kvm->mmu_lock, for scalability, so
 987          * can't rely on kvm->mmu_lock to keep things ordered.
 988          */
 989         smp_rmb();
 990         if (kvm->mmu_notifier_seq != mmu_seq)
 991                 return 1;
 992         return 0;
 993 }
 994 #endif
 995
 996 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
 997
 998 #ifdef CONFIG_S390
 999 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
1000 #else
1001 #define KVM_MAX_IRQ_ROUTES 1024
1002 #endif
1003
1004 int kvm_setup_default_irq_routing(struct kvm *kvm);
1005 int kvm_set_irq_routing(struct kvm *kvm,
1006                         const struct kvm_irq_routing_entry *entries,
1007                         unsigned nr,
1008                         unsigned flags);
1009 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
1010                           const struct kvm_irq_routing_entry *ue);
1011 void kvm_free_irq_routing(struct kvm *kvm);
1012
1013 #else
1014
1015 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
1016
1017 #endif
1018
1019 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
1020
1021 #ifdef CONFIG_HAVE_KVM_EVENTFD
1022
1023 void kvm_eventfd_init(struct kvm *kvm);
1024 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
1025
1026 #ifdef CONFIG_HAVE_KVM_IRQFD
1027 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
1028 void kvm_irqfd_release(struct kvm *kvm);
1029 void kvm_irq_routing_update(struct kvm *);
1030 #else
1031 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1032 {
1033         return -EINVAL;
1034 }
1035
1036 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1037 #endif
1038
1039 #else
1040
1041 static inline void kvm_eventfd_init(struct kvm *kvm) {}
1042
1043 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1044 {
1045         return -EINVAL;
1046 }
1047
1048 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1049
1050 #ifdef CONFIG_HAVE_KVM_IRQCHIP
1051 static inline void kvm_irq_routing_update(struct kvm *kvm)
1052 {
1053 }
1054 #endif
1055
1056 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
1057 {
1058         return -ENOSYS;
1059 }
1060
1061 #endif /* CONFIG_HAVE_KVM_EVENTFD */
1062
1063 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
1064 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
1065 #else
1066 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
1067 #endif
1068
1069 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1070 {
1071         set_bit(req, &vcpu->requests);
1072 }
1073
1074 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1075 {
1076         if (test_bit(req, &vcpu->requests)) {
1077                 clear_bit(req, &vcpu->requests);
1078                 return true;
1079         } else {
1080                 return false;
1081         }
1082 }
1083
1084 extern bool kvm_rebooting;
1085
1086 struct kvm_device {
1087         struct kvm_device_ops *ops;
1088         struct kvm *kvm;
1089         void *private;
1090         struct list_head vm_node;
1091 };
1092
1093 /* create, destroy, and name are mandatory */
1094 struct kvm_device_ops {
1095         const char *name;
1096         int (*create)(struct kvm_device *dev, u32 type);
1097
1098         /*
1099          * Destroy is responsible for freeing dev.
1100          *
1101          * Destroy may be called before or after destructors are called
1102          * on emulated I/O regions, depending on whether a reference is
1103          * held by a vcpu or other kvm component that gets destroyed
1104          * after the emulated I/O.
1105          */
1106         void (*destroy)(struct kvm_device *dev);
1107
1108         int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1109         int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1110         int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1111         long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1112                       unsigned long arg);
1113 };
1114
1115 void kvm_device_get(struct kvm_device *dev);
1116 void kvm_device_put(struct kvm_device *dev);
1117 struct kvm_device *kvm_device_from_filp(struct file *filp);
1118 int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type);
1119 void kvm_unregister_device_ops(u32 type);
1120
1121 extern struct kvm_device_ops kvm_mpic_ops;
1122 extern struct kvm_device_ops kvm_xics_ops;
1123 extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
1124 extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
1125
1126 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1127
1128 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1129 {
1130         vcpu->spin_loop.in_spin_loop = val;
1131 }
1132 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1133 {
1134         vcpu->spin_loop.dy_eligible = val;
1135 }
1136
1137 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1138
1139 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1140 {
1141 }
1142
1143 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1144 {
1145 }
1146 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1147 #endif
1148