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
 143 #define KVM_USERSPACE_IRQ_SOURCE_ID             0
 144 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID        1
 145
 146 extern struct kmem_cache *kvm_vcpu_cache;
 147
 148 extern spinlock_t kvm_lock;
 149 extern struct list_head vm_list;
 150
 151 struct kvm_io_range {
 152         gpa_t addr;
 153         int len;
 154         struct kvm_io_device *dev;
 155 };
 156
 157 #define NR_IOBUS_DEVS 1000
 158
 159 struct kvm_io_bus {
 160         int dev_count;
 161         int ioeventfd_count;
 162         struct kvm_io_range range[];
 163 };
 164
 165 enum kvm_bus {
 166         KVM_MMIO_BUS,
 167         KVM_PIO_BUS,
 168         KVM_VIRTIO_CCW_NOTIFY_BUS,
 169         KVM_FAST_MMIO_BUS,
 170         KVM_NR_BUSES
 171 };
 172
 173 int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
 174                      int len, const void *val);
 175 int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
 176                             gpa_t addr, int len, const void *val, long cookie);
 177 int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
 178                     int len, void *val);
 179 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
 180                             int len, struct kvm_io_device *dev);
 181 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
 182                               struct kvm_io_device *dev);
 183
 184 #ifdef CONFIG_KVM_ASYNC_PF
 185 struct kvm_async_pf {
 186         struct work_struct work;
 187         struct list_head link;
 188         struct list_head queue;
 189         struct kvm_vcpu *vcpu;
 190         struct mm_struct *mm;
 191         gva_t gva;
 192         unsigned long addr;
 193         struct kvm_arch_async_pf arch;
 194         bool   wakeup_all;
 195 };
 196
 197 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
 198 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
 199 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva,
 200                        struct kvm_arch_async_pf *arch);
 201 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
 202 #endif
 203
 204 enum {
 205         OUTSIDE_GUEST_MODE,
 206         IN_GUEST_MODE,
 207         EXITING_GUEST_MODE,
 208         READING_SHADOW_PAGE_TABLES,
 209 };
 210
 211 /*
 212  * Sometimes a large or cross-page mmio needs to be broken up into separate
 213  * exits for userspace servicing.
 214  */
 215 struct kvm_mmio_fragment {
 216         gpa_t gpa;
 217         void *data;
 218         unsigned len;
 219 };
 220
 221 struct kvm_vcpu {
 222         struct kvm *kvm;
 223 #ifdef CONFIG_PREEMPT_NOTIFIERS
 224         struct preempt_notifier preempt_notifier;
 225 #endif
 226         int cpu;
 227         int vcpu_id;
 228         int srcu_idx;
 229         int mode;
 230         unsigned long requests;
 231         unsigned long guest_debug;
 232
 233         struct mutex mutex;
 234         struct kvm_run *run;
 235
 236         int fpu_active;
 237         int guest_fpu_loaded, guest_xcr0_loaded;
 238         unsigned char fpu_counter;
 239         wait_queue_head_t wq;
 240         struct pid *pid;
 241         int sigset_active;
 242         sigset_t sigset;
 243         struct kvm_vcpu_stat stat;
 244
 245 #ifdef CONFIG_HAS_IOMEM
 246         int mmio_needed;
 247         int mmio_read_completed;
 248         int mmio_is_write;
 249         int mmio_cur_fragment;
 250         int mmio_nr_fragments;
 251         struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
 252 #endif
 253
 254 #ifdef CONFIG_KVM_ASYNC_PF
 255         struct {
 256                 u32 queued;
 257                 struct list_head queue;
 258                 struct list_head done;
 259                 spinlock_t lock;
 260         } async_pf;
 261 #endif
 262
 263 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
 264         /*
 265          * Cpu relax intercept or pause loop exit optimization
 266          * in_spin_loop: set when a vcpu does a pause loop exit
 267          *  or cpu relax intercepted.
 268          * dy_eligible: indicates whether vcpu is eligible for directed yield.
 269          */
 270         struct {
 271                 bool in_spin_loop;
 272                 bool dy_eligible;
 273         } spin_loop;
 274 #endif
 275         bool preempted;
 276         struct kvm_vcpu_arch arch;
 277 };
 278
 279 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
 280 {
 281         return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
 282 }
 283
 284 /*
 285  * Some of the bitops functions do not support too long bitmaps.
 286  * This number must be determined not to exceed such limits.
 287  */
 288 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
 289
 290 struct kvm_memory_slot {
 291         gfn_t base_gfn;
 292         unsigned long npages;
 293         unsigned long *dirty_bitmap;
 294         struct kvm_arch_memory_slot arch;
 295         unsigned long userspace_addr;
 296         u32 flags;
 297         short id;
 298 };
 299
 300 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
 301 {
 302         return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
 303 }
 304
 305 struct kvm_s390_adapter_int {
 306         u64 ind_addr;
 307         u64 summary_addr;
 308         u64 ind_offset;
 309         u32 summary_offset;
 310         u32 adapter_id;
 311 };
 312
 313 struct kvm_kernel_irq_routing_entry {
 314         u32 gsi;
 315         u32 type;
 316         int (*set)(struct kvm_kernel_irq_routing_entry *e,
 317                    struct kvm *kvm, int irq_source_id, int level,
 318                    bool line_status);
 319         union {
 320                 struct {
 321                         unsigned irqchip;
 322                         unsigned pin;
 323                 } irqchip;
 324                 struct msi_msg msi;
 325                 struct kvm_s390_adapter_int adapter;
 326         };
 327         struct hlist_node link;
 328 };
 329
 330 #ifndef KVM_PRIVATE_MEM_SLOTS
 331 #define KVM_PRIVATE_MEM_SLOTS 0
 332 #endif
 333
 334 #ifndef KVM_MEM_SLOTS_NUM
 335 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
 336 #endif
 337
 338 #ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE
 339 static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
 340 {
 341         return 0;
 342 }
 343 #endif
 344
 345 /*
 346  * Note:
 347  * memslots are not sorted by id anymore, please use id_to_memslot()
 348  * to get the memslot by its id.
 349  */
 350 struct kvm_memslots {
 351         u64 generation;
 352         struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
 353         /* The mapping table from slot id to the index in memslots[]. */
 354         short id_to_index[KVM_MEM_SLOTS_NUM];
 355         atomic_t lru_slot;
 356         int used_slots;
 357 };
 358
 359 struct kvm {
 360         spinlock_t mmu_lock;
 361         struct mutex slots_lock;
 362         struct mm_struct *mm; /* userspace tied to this vm */
 363         struct kvm_memslots *memslots[KVM_ADDRESS_SPACE_NUM];
 364         struct srcu_struct srcu;
 365         struct srcu_struct irq_srcu;
 366 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 367         u32 bsp_vcpu_id;
 368 #endif
 369         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 370         atomic_t online_vcpus;
 371         int last_boosted_vcpu;
 372         struct list_head vm_list;
 373         struct mutex lock;
 374         struct kvm_io_bus *buses[KVM_NR_BUSES];
 375 #ifdef CONFIG_HAVE_KVM_EVENTFD
 376         struct {
 377                 spinlock_t        lock;
 378                 struct list_head  items;
 379                 struct list_head  resampler_list;
 380                 struct mutex      resampler_lock;
 381         } irqfds;
 382         struct list_head ioeventfds;
 383 #endif
 384         struct kvm_vm_stat stat;
 385         struct kvm_arch arch;
 386         atomic_t users_count;
 387 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 388         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 389         spinlock_t ring_lock;
 390         struct list_head coalesced_zones;
 391 #endif
 392
 393         struct mutex irq_lock;
 394 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 395         /*
 396          * Update side is protected by irq_lock.
 397          */
 398         struct kvm_irq_routing_table __rcu *irq_routing;
 399 #endif
 400 #ifdef CONFIG_HAVE_KVM_IRQFD
 401         struct hlist_head irq_ack_notifier_list;
 402 #endif
 403
 404 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 405         struct mmu_notifier mmu_notifier;
 406         unsigned long mmu_notifier_seq;
 407         long mmu_notifier_count;
 408 #endif
 409         long tlbs_dirty;
 410         struct list_head devices;
 411 };
 412
 413 #define kvm_err(fmt, ...) \
 414         pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
 415 #define kvm_info(fmt, ...) \
 416         pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
 417 #define kvm_debug(fmt, ...) \
 418         pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
 419 #define kvm_pr_unimpl(fmt, ...) \
 420         pr_err_ratelimited("kvm [%i]: " fmt, \
 421                            task_tgid_nr(current), ## __VA_ARGS__)
 422
 423 /* The guest did something we don't support. */
 424 #define vcpu_unimpl(vcpu, fmt, ...)                                     \
 425         kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
 426
 427 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 428 {
 429         smp_rmb();
 430         return kvm->vcpus[i];
 431 }
 432
 433 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
 434         for (idx = 0; \
 435              idx < atomic_read(&kvm->online_vcpus) && \
 436              (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
 437              idx++)
 438
 439 #define kvm_for_each_memslot(memslot, slots)    \
 440         for (memslot = &slots->memslots[0];     \
 441               memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
 442                 memslot++)
 443
 444 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 445 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 446
 447 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
 448 void vcpu_put(struct kvm_vcpu *vcpu);
 449
 450 #ifdef __KVM_HAVE_IOAPIC
 451 void kvm_vcpu_request_scan_ioapic(struct kvm *kvm);
 452 #else
 453 static inline void kvm_vcpu_request_scan_ioapic(struct kvm *kvm)
 454 {
 455 }
 456 #endif
 457
 458 #ifdef CONFIG_HAVE_KVM_IRQFD
 459 int kvm_irqfd_init(void);
 460 void kvm_irqfd_exit(void);
 461 #else
 462 static inline int kvm_irqfd_init(void)
 463 {
 464         return 0;
 465 }
 466
 467 static inline void kvm_irqfd_exit(void)
 468 {
 469 }
 470 #endif
 471 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
 472                   struct module *module);
 473 void kvm_exit(void);
 474
 475 void kvm_get_kvm(struct kvm *kvm);
 476 void kvm_put_kvm(struct kvm *kvm);
 477
 478 static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id)
 479 {
 480         return rcu_dereference_check(kvm->memslots[as_id],
 481                         srcu_read_lock_held(&kvm->srcu)
 482                         || lockdep_is_held(&kvm->slots_lock));
 483 }
 484
 485 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
 486 {
 487         return __kvm_memslots(kvm, 0);
 488 }
 489
 490 static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu)
 491 {
 492         int as_id = kvm_arch_vcpu_memslots_id(vcpu);
 493
 494         return __kvm_memslots(vcpu->kvm, as_id);
 495 }
 496
 497 static inline struct kvm_memory_slot *
 498 id_to_memslot(struct kvm_memslots *slots, int id)
 499 {
 500         int index = slots->id_to_index[id];
 501         struct kvm_memory_slot *slot;
 502
 503         slot = &slots->memslots[index];
 504
 505         WARN_ON(slot->id != id);
 506         return slot;
 507 }
 508
 509 /*
 510  * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
 511  * - create a new memory slot
 512  * - delete an existing memory slot
 513  * - modify an existing memory slot
 514  *   -- move it in the guest physical memory space
 515  *   -- just change its flags
 516  *
 517  * Since flags can be changed by some of these operations, the following
 518  * differentiation is the best we can do for __kvm_set_memory_region():
 519  */
 520 enum kvm_mr_change {
 521         KVM_MR_CREATE,
 522         KVM_MR_DELETE,
 523         KVM_MR_MOVE,
 524         KVM_MR_FLAGS_ONLY,
 525 };
 526
 527 int kvm_set_memory_region(struct kvm *kvm,
 528                           const struct kvm_userspace_memory_region *mem);
 529 int __kvm_set_memory_region(struct kvm *kvm,
 530                             const struct kvm_userspace_memory_region *mem);
 531 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 532                            struct kvm_memory_slot *dont);
 533 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 534                             unsigned long npages);
 535 void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots);
 536 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 537                                 struct kvm_memory_slot *memslot,
 538                                 const struct kvm_userspace_memory_region *mem,
 539                                 enum kvm_mr_change change);
 540 void kvm_arch_commit_memory_region(struct kvm *kvm,
 541                                 const struct kvm_userspace_memory_region *mem,
 542                                 const struct kvm_memory_slot *old,
 543                                 const struct kvm_memory_slot *new,
 544                                 enum kvm_mr_change change);
 545 bool kvm_largepages_enabled(void);
 546 void kvm_disable_largepages(void);
 547 /* flush all memory translations */
 548 void kvm_arch_flush_shadow_all(struct kvm *kvm);
 549 /* flush memory translations pointing to 'slot' */
 550 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 551                                    struct kvm_memory_slot *slot);
 552
 553 int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn,
 554                             struct page **pages, int nr_pages);
 555
 556 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 557 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 558 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable);
 559 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
 560 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn,
 561                                       bool *writable);
 562 void kvm_release_page_clean(struct page *page);
 563 void kvm_release_page_dirty(struct page *page);
 564 void kvm_set_page_accessed(struct page *page);
 565
 566 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
 567 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 568 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
 569                       bool *writable);
 570 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
 571 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
 572 pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn, bool atomic,
 573                            bool *async, bool write_fault, bool *writable);
 574
 575 void kvm_release_pfn_clean(pfn_t pfn);
 576 void kvm_set_pfn_dirty(pfn_t pfn);
 577 void kvm_set_pfn_accessed(pfn_t pfn);
 578 void kvm_get_pfn(pfn_t pfn);
 579
 580 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 581                         int len);
 582 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 583                           unsigned long len);
 584 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 585 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 586                            void *data, unsigned long len);
 587 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 588                          int offset, int len);
 589 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 590                     unsigned long len);
 591 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 592                            void *data, unsigned long len);
 593 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 594                               gpa_t gpa, unsigned long len);
 595 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 596 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 597 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 598 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 599 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
 600 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 601
 602 struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
 603 struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn);
 604 pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn);
 605 pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
 606 struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn);
 607 unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn);
 608 unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable);
 609 int kvm_vcpu_read_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, void *data, int offset,
 610                              int len);
 611 int kvm_vcpu_read_guest_atomic(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
 612                                unsigned long len);
 613 int kvm_vcpu_read_guest(struct kvm_vcpu *vcpu, gpa_t gpa, void *data,
 614                         unsigned long len);
 615 int kvm_vcpu_write_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, const void *data,
 616                               int offset, int len);
 617 int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data,
 618                          unsigned long len);
 619 void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn);
 620
 621 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 622 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 623 int kvm_vcpu_yield_to(struct kvm_vcpu *target);
 624 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
 625 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 626 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 627
 628 void kvm_flush_remote_tlbs(struct kvm *kvm);
 629 void kvm_reload_remote_mmus(struct kvm *kvm);
 630 void kvm_make_mclock_inprogress_request(struct kvm *kvm);
 631 void kvm_make_scan_ioapic_request(struct kvm *kvm);
 632 bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);
 633
 634 long kvm_arch_dev_ioctl(struct file *filp,
 635                         unsigned int ioctl, unsigned long arg);
 636 long kvm_arch_vcpu_ioctl(struct file *filp,
 637                          unsigned int ioctl, unsigned long arg);
 638 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
 639
 640 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext);
 641
 642 int kvm_get_dirty_log(struct kvm *kvm,
 643                         struct kvm_dirty_log *log, int *is_dirty);
 644
 645 int kvm_get_dirty_log_protect(struct kvm *kvm,
 646                         struct kvm_dirty_log *log, bool *is_dirty);
 647
 648 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
 649                                         struct kvm_memory_slot *slot,
 650                                         gfn_t gfn_offset,
 651                                         unsigned long mask);
 652
 653 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 654                                 struct kvm_dirty_log *log);
 655
 656 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
 657                         bool line_status);
 658 long kvm_arch_vm_ioctl(struct file *filp,
 659                        unsigned int ioctl, unsigned long arg);
 660
 661 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 662 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 663
 664 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 665                                     struct kvm_translation *tr);
 666
 667 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 668 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 669 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 670                                   struct kvm_sregs *sregs);
 671 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 672                                   struct kvm_sregs *sregs);
 673 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 674                                     struct kvm_mp_state *mp_state);
 675 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 676                                     struct kvm_mp_state *mp_state);
 677 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 678                                         struct kvm_guest_debug *dbg);
 679 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 680
 681 int kvm_arch_init(void *opaque);
 682 void kvm_arch_exit(void);
 683
 684 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 685 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 686
 687 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
 688
 689 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 690 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 691 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 692 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 693 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 694 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
 695 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 696
 697 int kvm_arch_hardware_enable(void);
 698 void kvm_arch_hardware_disable(void);
 699 int kvm_arch_hardware_setup(void);
 700 void kvm_arch_hardware_unsetup(void);
 701 void kvm_arch_check_processor_compat(void *rtn);
 702 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 703 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
 704
 705 void *kvm_kvzalloc(unsigned long size);
 706
 707 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
 708 static inline struct kvm *kvm_arch_alloc_vm(void)
 709 {
 710         return kzalloc(sizeof(struct kvm), GFP_KERNEL);
 711 }
 712
 713 static inline void kvm_arch_free_vm(struct kvm *kvm)
 714 {
 715         kfree(kvm);
 716 }
 717 #endif
 718
 719 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA
 720 void kvm_arch_register_noncoherent_dma(struct kvm *kvm);
 721 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm);
 722 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm);
 723 #else
 724 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm)
 725 {
 726 }
 727
 728 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm)
 729 {
 730 }
 731
 732 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
 733 {
 734         return false;
 735 }
 736 #endif
 737 #ifdef __KVM_HAVE_ARCH_ASSIGNED_DEVICE
 738 void kvm_arch_start_assignment(struct kvm *kvm);
 739 void kvm_arch_end_assignment(struct kvm *kvm);
 740 bool kvm_arch_has_assigned_device(struct kvm *kvm);
 741 #else
 742 static inline void kvm_arch_start_assignment(struct kvm *kvm)
 743 {
 744 }
 745
 746 static inline void kvm_arch_end_assignment(struct kvm *kvm)
 747 {
 748 }
 749
 750 static inline bool kvm_arch_has_assigned_device(struct kvm *kvm)
 751 {
 752         return false;
 753 }
 754 #endif
 755
 756 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
 757 {
 758 #ifdef __KVM_HAVE_ARCH_WQP
 759         return vcpu->arch.wqp;
 760 #else
 761         return &vcpu->wq;
 762 #endif
 763 }
 764
 765 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED
 766 /*
 767  * returns true if the virtual interrupt controller is initialized and
 768  * ready to accept virtual IRQ. On some architectures the virtual interrupt
 769  * controller is dynamically instantiated and this is not always true.
 770  */
 771 bool kvm_arch_intc_initialized(struct kvm *kvm);
 772 #else
 773 static inline bool kvm_arch_intc_initialized(struct kvm *kvm)
 774 {
 775         return true;
 776 }
 777 #endif
 778
 779 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
 780 void kvm_arch_destroy_vm(struct kvm *kvm);
 781 void kvm_arch_sync_events(struct kvm *kvm);
 782
 783 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 784 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 785
 786 bool kvm_is_reserved_pfn(pfn_t pfn);
 787
 788 struct kvm_irq_ack_notifier {
 789         struct hlist_node link;
 790         unsigned gsi;
 791         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 792 };
 793
 794 int kvm_irq_map_gsi(struct kvm *kvm,
 795                     struct kvm_kernel_irq_routing_entry *entries, int gsi);
 796 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);
 797
 798 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
 799                 bool line_status);
 800 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 801 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
 802                 int irq_source_id, int level, bool line_status);
 803 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
 804 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 805 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 806                                    struct kvm_irq_ack_notifier *kian);
 807 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 808                                    struct kvm_irq_ack_notifier *kian);
 809 int kvm_request_irq_source_id(struct kvm *kvm);
 810 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 811
 812 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
 813 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 814 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 815 #else
 816 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 817                                       struct kvm_memory_slot *slot)
 818 {
 819         return 0;
 820 }
 821
 822 static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
 823                                          struct kvm_memory_slot *slot)
 824 {
 825 }
 826 #endif
 827
 828 /* must be called with irqs disabled */
 829 static inline void __kvm_guest_enter(void)
 830 {
 831         guest_enter();
 832         /* KVM does not hold any references to rcu protected data when it
 833          * switches CPU into a guest mode. In fact switching to a guest mode
 834          * is very similar to exiting to userspace from rcu point of view. In
 835          * addition CPU may stay in a guest mode for quite a long time (up to
 836          * one time slice). Lets treat guest mode as quiescent state, just like
 837          * we do with user-mode execution.
 838          */
 839         if (!context_tracking_cpu_is_enabled())
 840                 rcu_virt_note_context_switch(smp_processor_id());
 841 }
 842
 843 /* must be called with irqs disabled */
 844 static inline void __kvm_guest_exit(void)
 845 {
 846         guest_exit();
 847 }
 848
 849 static inline void kvm_guest_enter(void)
 850 {
 851         unsigned long flags;
 852
 853         local_irq_save(flags);
 854         __kvm_guest_enter();
 855         local_irq_restore(flags);
 856 }
 857
 858 static inline void kvm_guest_exit(void)
 859 {
 860         unsigned long flags;
 861
 862         local_irq_save(flags);
 863         __kvm_guest_exit();
 864         local_irq_restore(flags);
 865 }
 866
 867 /*
 868  * search_memslots() and __gfn_to_memslot() are here because they are
 869  * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
 870  * gfn_to_memslot() itself isn't here as an inline because that would
 871  * bloat other code too much.
 872  */
 873 static inline struct kvm_memory_slot *
 874 search_memslots(struct kvm_memslots *slots, gfn_t gfn)
 875 {
 876         int start = 0, end = slots->used_slots;
 877         int slot = atomic_read(&slots->lru_slot);
 878         struct kvm_memory_slot *memslots = slots->memslots;
 879
 880         if (gfn >= memslots[slot].base_gfn &&
 881             gfn < memslots[slot].base_gfn + memslots[slot].npages)
 882                 return &memslots[slot];
 883
 884         while (start < end) {
 885                 slot = start + (end - start) / 2;
 886
 887                 if (gfn >= memslots[slot].base_gfn)
 888                         end = slot;
 889                 else
 890                         start = slot + 1;
 891         }
 892
 893         if (gfn >= memslots[start].base_gfn &&
 894             gfn < memslots[start].base_gfn + memslots[start].npages) {
 895                 atomic_set(&slots->lru_slot, start);
 896                 return &memslots[start];
 897         }
 898
 899         return NULL;
 900 }
 901
 902 static inline struct kvm_memory_slot *
 903 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
 904 {
 905         return search_memslots(slots, gfn);
 906 }
 907
 908 static inline unsigned long
 909 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
 910 {
 911         return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
 912 }
 913
 914 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
 915 {
 916         return gfn_to_memslot(kvm, gfn)->id;
 917 }
 918
 919 static inline gfn_t
 920 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
 921 {
 922         gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
 923
 924         return slot->base_gfn + gfn_offset;
 925 }
 926
 927 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 928 {
 929         return (gpa_t)gfn << PAGE_SHIFT;
 930 }
 931
 932 static inline gfn_t gpa_to_gfn(gpa_t gpa)
 933 {
 934         return (gfn_t)(gpa >> PAGE_SHIFT);
 935 }
 936
 937 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 938 {
 939         return (hpa_t)pfn << PAGE_SHIFT;
 940 }
 941
 942 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
 943 {
 944         unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
 945
 946         return kvm_is_error_hva(hva);
 947 }
 948
 949 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 950 {
 951         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 952 }
 953
 954 enum kvm_stat_kind {
 955         KVM_STAT_VM,
 956         KVM_STAT_VCPU,
 957 };
 958
 959 struct kvm_stats_debugfs_item {
 960         const char *name;
 961         int offset;
 962         enum kvm_stat_kind kind;
 963         struct dentry *dentry;
 964 };
 965 extern struct kvm_stats_debugfs_item debugfs_entries[];
 966 extern struct dentry *kvm_debugfs_dir;
 967
 968 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 969 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
 970 {
 971         if (unlikely(kvm->mmu_notifier_count))
 972                 return 1;
 973         /*
 974          * Ensure the read of mmu_notifier_count happens before the read
 975          * of mmu_notifier_seq.  This interacts with the smp_wmb() in
 976          * mmu_notifier_invalidate_range_end to make sure that the caller
 977          * either sees the old (non-zero) value of mmu_notifier_count or
 978          * the new (incremented) value of mmu_notifier_seq.
 979          * PowerPC Book3s HV KVM calls this under a per-page lock
 980          * rather than under kvm->mmu_lock, for scalability, so
 981          * can't rely on kvm->mmu_lock to keep things ordered.
 982          */
 983         smp_rmb();
 984         if (kvm->mmu_notifier_seq != mmu_seq)
 985                 return 1;
 986         return 0;
 987 }
 988 #endif
 989
 990 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
 991
 992 #ifdef CONFIG_S390
 993 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that...
 994 #else
 995 #define KVM_MAX_IRQ_ROUTES 1024
 996 #endif
 997
 998 int kvm_setup_default_irq_routing(struct kvm *kvm);
 999 int kvm_set_irq_routing(struct kvm *kvm,
1000                         const struct kvm_irq_routing_entry *entries,
1001                         unsigned nr,
1002                         unsigned flags);
1003 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
1004                           const struct kvm_irq_routing_entry *ue);
1005 void kvm_free_irq_routing(struct kvm *kvm);
1006
1007 #else
1008
1009 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
1010
1011 #endif
1012
1013 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
1014
1015 #ifdef CONFIG_HAVE_KVM_EVENTFD
1016
1017 void kvm_eventfd_init(struct kvm *kvm);
1018 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
1019
1020 #ifdef CONFIG_HAVE_KVM_IRQFD
1021 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
1022 void kvm_irqfd_release(struct kvm *kvm);
1023 void kvm_irq_routing_update(struct kvm *);
1024 #else
1025 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1026 {
1027         return -EINVAL;
1028 }
1029
1030 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1031 #endif
1032
1033 #else
1034
1035 static inline void kvm_eventfd_init(struct kvm *kvm) {}
1036
1037 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
1038 {
1039         return -EINVAL;
1040 }
1041
1042 static inline void kvm_irqfd_release(struct kvm *kvm) {}
1043
1044 #ifdef CONFIG_HAVE_KVM_IRQCHIP
1045 static inline void kvm_irq_routing_update(struct kvm *kvm)
1046 {
1047 }
1048 #endif
1049
1050 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
1051 {
1052         return -ENOSYS;
1053 }
1054
1055 #endif /* CONFIG_HAVE_KVM_EVENTFD */
1056
1057 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
1058 static inline bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu)
1059 {
1060         return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
1061 }
1062
1063 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
1064 {
1065         return (vcpu->arch.apic_base & MSR_IA32_APICBASE_BSP) != 0;
1066 }
1067
1068 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
1069
1070 #else
1071
1072 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
1073
1074 #endif
1075
1076 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1077 {
1078         set_bit(req, &vcpu->requests);
1079 }
1080
1081 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1082 {
1083         if (test_bit(req, &vcpu->requests)) {
1084                 clear_bit(req, &vcpu->requests);
1085                 return true;
1086         } else {
1087                 return false;
1088         }
1089 }
1090
1091 extern bool kvm_rebooting;
1092
1093 struct kvm_device {
1094         struct kvm_device_ops *ops;
1095         struct kvm *kvm;
1096         void *private;
1097         struct list_head vm_node;
1098 };
1099
1100 /* create, destroy, and name are mandatory */
1101 struct kvm_device_ops {
1102         const char *name;
1103         int (*create)(struct kvm_device *dev, u32 type);
1104
1105         /*
1106          * Destroy is responsible for freeing dev.
1107          *
1108          * Destroy may be called before or after destructors are called
1109          * on emulated I/O regions, depending on whether a reference is
1110          * held by a vcpu or other kvm component that gets destroyed
1111          * after the emulated I/O.
1112          */
1113         void (*destroy)(struct kvm_device *dev);
1114
1115         int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1116         int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1117         int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr);
1118         long (*ioctl)(struct kvm_device *dev, unsigned int ioctl,
1119                       unsigned long arg);
1120 };
1121
1122 void kvm_device_get(struct kvm_device *dev);
1123 void kvm_device_put(struct kvm_device *dev);
1124 struct kvm_device *kvm_device_from_filp(struct file *filp);
1125 int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type);
1126 void kvm_unregister_device_ops(u32 type);
1127
1128 extern struct kvm_device_ops kvm_mpic_ops;
1129 extern struct kvm_device_ops kvm_xics_ops;
1130 extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
1131 extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
1132
1133 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1134
1135 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1136 {
1137         vcpu->spin_loop.in_spin_loop = val;
1138 }
1139 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1140 {
1141         vcpu->spin_loop.dy_eligible = val;
1142 }
1143
1144 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1145
1146 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1147 {
1148 }
1149
1150 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1151 {
1152 }
1153 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1154 #endif
1155