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