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/mm.h>
  17 #include <linux/preempt.h>
  18 #include <linux/msi.h>
  19 #include <asm/signal.h>
  20
  21 #include <linux/kvm.h>
  22 #include <linux/kvm_para.h>
  23
  24 #include <linux/kvm_types.h>
  25
  26 #include <asm/kvm_host.h>
  27
  28 /*
  29  * vcpu->requests bit members
  30  */
  31 #define KVM_REQ_TLB_FLUSH          0
  32 #define KVM_REQ_MIGRATE_TIMER      1
  33 #define KVM_REQ_REPORT_TPR_ACCESS  2
  34 #define KVM_REQ_MMU_RELOAD         3
  35 #define KVM_REQ_TRIPLE_FAULT       4
  36 #define KVM_REQ_PENDING_TIMER      5
  37 #define KVM_REQ_UNHALT             6
  38 #define KVM_REQ_MMU_SYNC           7
  39 #define KVM_REQ_KVMCLOCK_UPDATE    8
  40 #define KVM_REQ_KICK               9
  41
  42 #define KVM_USERSPACE_IRQ_SOURCE_ID     0
  43
  44 struct kvm;
  45 struct kvm_vcpu;
  46 extern struct kmem_cache *kvm_vcpu_cache;
  47
  48 /*
  49  * It would be nice to use something smarter than a linear search, TBD...
  50  * Thankfully we dont expect many devices to register (famous last words :),
  51  * so until then it will suffice.  At least its abstracted so we can change
  52  * in one place.
  53  */
  54 struct kvm_io_bus {
  55         int                   dev_count;
  56 #define NR_IOBUS_DEVS 6
  57         struct kvm_io_device *devs[NR_IOBUS_DEVS];
  58 };
  59
  60 void kvm_io_bus_init(struct kvm_io_bus *bus);
  61 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
  62 int kvm_io_bus_write(struct kvm_io_bus *bus, gpa_t addr, int len,
  63                      const void *val);
  64 int kvm_io_bus_read(struct kvm_io_bus *bus, gpa_t addr, int len,
  65                     void *val);
  66 int __kvm_io_bus_register_dev(struct kvm_io_bus *bus,
  67                                struct kvm_io_device *dev);
  68 int kvm_io_bus_register_dev(struct kvm *kvm, struct kvm_io_bus *bus,
  69                             struct kvm_io_device *dev);
  70 void __kvm_io_bus_unregister_dev(struct kvm_io_bus *bus,
  71                                  struct kvm_io_device *dev);
  72 void kvm_io_bus_unregister_dev(struct kvm *kvm, struct kvm_io_bus *bus,
  73                                struct kvm_io_device *dev);
  74
  75 struct kvm_vcpu {
  76         struct kvm *kvm;
  77 #ifdef CONFIG_PREEMPT_NOTIFIERS
  78         struct preempt_notifier preempt_notifier;
  79 #endif
  80         int vcpu_id;
  81         struct mutex mutex;
  82         int   cpu;
  83         struct kvm_run *run;
  84         unsigned long requests;
  85         unsigned long guest_debug;
  86         int fpu_active;
  87         int guest_fpu_loaded;
  88         wait_queue_head_t wq;
  89         int sigset_active;
  90         sigset_t sigset;
  91         struct kvm_vcpu_stat stat;
  92
  93 #ifdef CONFIG_HAS_IOMEM
  94         int mmio_needed;
  95         int mmio_read_completed;
  96         int mmio_is_write;
  97         int mmio_size;
  98         unsigned char mmio_data[8];
  99         gpa_t mmio_phys_addr;
 100 #endif
 101
 102         struct kvm_vcpu_arch arch;
 103 };
 104
 105 struct kvm_memory_slot {
 106         gfn_t base_gfn;
 107         unsigned long npages;
 108         unsigned long flags;
 109         unsigned long *rmap;
 110         unsigned long *dirty_bitmap;
 111         struct {
 112                 unsigned long rmap_pde;
 113                 int write_count;
 114         } *lpage_info[KVM_NR_PAGE_SIZES - 1];
 115         unsigned long userspace_addr;
 116         int user_alloc;
 117 };
 118
 119 struct kvm_kernel_irq_routing_entry {
 120         u32 gsi;
 121         u32 type;
 122         int (*set)(struct kvm_kernel_irq_routing_entry *e,
 123                    struct kvm *kvm, int irq_source_id, int level);
 124         union {
 125                 struct {
 126                         unsigned irqchip;
 127                         unsigned pin;
 128                 } irqchip;
 129                 struct msi_msg msi;
 130         };
 131         struct hlist_node link;
 132 };
 133
 134 #ifdef __KVM_HAVE_IOAPIC
 135
 136 struct kvm_irq_routing_table {
 137         int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
 138         struct kvm_kernel_irq_routing_entry *rt_entries;
 139         u32 nr_rt_entries;
 140         /*
 141          * Array indexed by gsi. Each entry contains list of irq chips
 142          * the gsi is connected to.
 143          */
 144         struct hlist_head map[0];
 145 };
 146
 147 #else
 148
 149 struct kvm_irq_routing_table {};
 150
 151 #endif
 152
 153 struct kvm {
 154         spinlock_t mmu_lock;
 155         spinlock_t requests_lock;
 156         struct rw_semaphore slots_lock;
 157         struct mm_struct *mm; /* userspace tied to this vm */
 158         int nmemslots;
 159         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 160                                         KVM_PRIVATE_MEM_SLOTS];
 161 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 162         u32 bsp_vcpu_id;
 163         struct kvm_vcpu *bsp_vcpu;
 164 #endif
 165         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 166         atomic_t online_vcpus;
 167         struct list_head vm_list;
 168         struct mutex lock;
 169         struct kvm_io_bus mmio_bus;
 170         struct kvm_io_bus pio_bus;
 171 #ifdef CONFIG_HAVE_KVM_EVENTFD
 172         struct {
 173                 spinlock_t        lock;
 174                 struct list_head  items;
 175         } irqfds;
 176         struct list_head ioeventfds;
 177 #endif
 178         struct kvm_vm_stat stat;
 179         struct kvm_arch arch;
 180         atomic_t users_count;
 181 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 182         struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
 183         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 184 #endif
 185
 186         struct mutex irq_lock;
 187 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 188         struct kvm_irq_routing_table *irq_routing;
 189         struct hlist_head mask_notifier_list;
 190         struct hlist_head irq_ack_notifier_list;
 191 #endif
 192
 193 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 194         struct mmu_notifier mmu_notifier;
 195         unsigned long mmu_notifier_seq;
 196         long mmu_notifier_count;
 197 #endif
 198 };
 199
 200 /* The guest did something we don't support. */
 201 #define pr_unimpl(vcpu, fmt, ...)                                       \
 202  do {                                                                   \
 203         if (printk_ratelimit())                                         \
 204                 printk(KERN_ERR "kvm: %i: cpu%i " fmt,                  \
 205                        current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 206  } while (0)
 207
 208 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 209 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 210
 211 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 212 {
 213         smp_rmb();
 214         return kvm->vcpus[i];
 215 }
 216
 217 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
 218         for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
 219              idx < atomic_read(&kvm->online_vcpus) && vcpup; \
 220              vcpup = kvm_get_vcpu(kvm, ++idx))
 221
 222 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 223 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 224
 225 void vcpu_load(struct kvm_vcpu *vcpu);
 226 void vcpu_put(struct kvm_vcpu *vcpu);
 227
 228 int kvm_init(void *opaque, unsigned int vcpu_size,
 229                   struct module *module);
 230 void kvm_exit(void);
 231
 232 void kvm_get_kvm(struct kvm *kvm);
 233 void kvm_put_kvm(struct kvm *kvm);
 234
 235 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 236 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 237 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 238 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
 239
 240 extern struct page *bad_page;
 241 extern pfn_t bad_pfn;
 242
 243 int is_error_page(struct page *page);
 244 int is_error_pfn(pfn_t pfn);
 245 int kvm_is_error_hva(unsigned long addr);
 246 int kvm_set_memory_region(struct kvm *kvm,
 247                           struct kvm_userspace_memory_region *mem,
 248                           int user_alloc);
 249 int __kvm_set_memory_region(struct kvm *kvm,
 250                             struct kvm_userspace_memory_region *mem,
 251                             int user_alloc);
 252 int kvm_arch_set_memory_region(struct kvm *kvm,
 253                                 struct kvm_userspace_memory_region *mem,
 254                                 struct kvm_memory_slot old,
 255                                 int user_alloc);
 256 void kvm_disable_largepages(void);
 257 void kvm_arch_flush_shadow(struct kvm *kvm);
 258 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
 259 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 260 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 261 void kvm_release_page_clean(struct page *page);
 262 void kvm_release_page_dirty(struct page *page);
 263 void kvm_set_page_dirty(struct page *page);
 264 void kvm_set_page_accessed(struct page *page);
 265
 266 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 267 void kvm_release_pfn_dirty(pfn_t);
 268 void kvm_release_pfn_clean(pfn_t pfn);
 269 void kvm_set_pfn_dirty(pfn_t pfn);
 270 void kvm_set_pfn_accessed(pfn_t pfn);
 271 void kvm_get_pfn(pfn_t pfn);
 272
 273 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 274                         int len);
 275 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 276                           unsigned long len);
 277 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 278 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 279                          int offset, int len);
 280 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 281                     unsigned long len);
 282 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 283 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 284 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 285 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 286 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 287
 288 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 289 void kvm_resched(struct kvm_vcpu *vcpu);
 290 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 291 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 292 void kvm_flush_remote_tlbs(struct kvm *kvm);
 293 void kvm_reload_remote_mmus(struct kvm *kvm);
 294
 295 long kvm_arch_dev_ioctl(struct file *filp,
 296                         unsigned int ioctl, unsigned long arg);
 297 long kvm_arch_vcpu_ioctl(struct file *filp,
 298                          unsigned int ioctl, unsigned long arg);
 299
 300 int kvm_dev_ioctl_check_extension(long ext);
 301
 302 int kvm_get_dirty_log(struct kvm *kvm,
 303                         struct kvm_dirty_log *log, int *is_dirty);
 304 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 305                                 struct kvm_dirty_log *log);
 306
 307 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 308                                    struct
 309                                    kvm_userspace_memory_region *mem,
 310                                    int user_alloc);
 311 long kvm_arch_vm_ioctl(struct file *filp,
 312                        unsigned int ioctl, unsigned long arg);
 313
 314 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 315 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 316
 317 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 318                                     struct kvm_translation *tr);
 319
 320 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 321 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 322 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 323                                   struct kvm_sregs *sregs);
 324 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 325                                   struct kvm_sregs *sregs);
 326 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 327                                     struct kvm_mp_state *mp_state);
 328 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 329                                     struct kvm_mp_state *mp_state);
 330 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 331                                         struct kvm_guest_debug *dbg);
 332 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 333
 334 int kvm_arch_init(void *opaque);
 335 void kvm_arch_exit(void);
 336
 337 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 338 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 339
 340 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 341 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 342 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 343 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 344 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 345 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 346
 347 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 348 int kvm_arch_hardware_enable(void *garbage);
 349 void kvm_arch_hardware_disable(void *garbage);
 350 int kvm_arch_hardware_setup(void);
 351 void kvm_arch_hardware_unsetup(void);
 352 void kvm_arch_check_processor_compat(void *rtn);
 353 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 354
 355 void kvm_free_physmem(struct kvm *kvm);
 356
 357 struct  kvm *kvm_arch_create_vm(void);
 358 void kvm_arch_destroy_vm(struct kvm *kvm);
 359 void kvm_free_all_assigned_devices(struct kvm *kvm);
 360 void kvm_arch_sync_events(struct kvm *kvm);
 361
 362 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 363 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 364
 365 int kvm_is_mmio_pfn(pfn_t pfn);
 366
 367 struct kvm_irq_ack_notifier {
 368         struct hlist_node link;
 369         unsigned gsi;
 370         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 371 };
 372
 373 #define KVM_ASSIGNED_MSIX_PENDING               0x1
 374 struct kvm_guest_msix_entry {
 375         u32 vector;
 376         u16 entry;
 377         u16 flags;
 378 };
 379
 380 struct kvm_assigned_dev_kernel {
 381         struct kvm_irq_ack_notifier ack_notifier;
 382         struct work_struct interrupt_work;
 383         struct list_head list;
 384         int assigned_dev_id;
 385         int host_busnr;
 386         int host_devfn;
 387         unsigned int entries_nr;
 388         int host_irq;
 389         bool host_irq_disabled;
 390         struct msix_entry *host_msix_entries;
 391         int guest_irq;
 392         struct kvm_guest_msix_entry *guest_msix_entries;
 393         unsigned long irq_requested_type;
 394         int irq_source_id;
 395         int flags;
 396         struct pci_dev *dev;
 397         struct kvm *kvm;
 398         spinlock_t assigned_dev_lock;
 399 };
 400
 401 struct kvm_irq_mask_notifier {
 402         void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 403         int irq;
 404         struct hlist_node link;
 405 };
 406
 407 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 408                                     struct kvm_irq_mask_notifier *kimn);
 409 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 410                                       struct kvm_irq_mask_notifier *kimn);
 411 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
 412
 413 #ifdef __KVM_HAVE_IOAPIC
 414 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
 415                                    union kvm_ioapic_redirect_entry *entry,
 416                                    unsigned long *deliver_bitmask);
 417 #endif
 418 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 419 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 420 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 421                                    struct kvm_irq_ack_notifier *kian);
 422 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 423                                    struct kvm_irq_ack_notifier *kian);
 424 int kvm_request_irq_source_id(struct kvm *kvm);
 425 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 426
 427 /* For vcpu->arch.iommu_flags */
 428 #define KVM_IOMMU_CACHE_COHERENCY       0x1
 429
 430 #ifdef CONFIG_IOMMU_API
 431 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn,
 432                         unsigned long npages);
 433 int kvm_iommu_map_guest(struct kvm *kvm);
 434 int kvm_iommu_unmap_guest(struct kvm *kvm);
 435 int kvm_assign_device(struct kvm *kvm,
 436                       struct kvm_assigned_dev_kernel *assigned_dev);
 437 int kvm_deassign_device(struct kvm *kvm,
 438                         struct kvm_assigned_dev_kernel *assigned_dev);
 439 #else /* CONFIG_IOMMU_API */
 440 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 441                                       gfn_t base_gfn,
 442                                       unsigned long npages)
 443 {
 444         return 0;
 445 }
 446
 447 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 448 {
 449         return -ENODEV;
 450 }
 451
 452 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 453 {
 454         return 0;
 455 }
 456
 457 static inline int kvm_assign_device(struct kvm *kvm,
 458                 struct kvm_assigned_dev_kernel *assigned_dev)
 459 {
 460         return 0;
 461 }
 462
 463 static inline int kvm_deassign_device(struct kvm *kvm,
 464                 struct kvm_assigned_dev_kernel *assigned_dev)
 465 {
 466         return 0;
 467 }
 468 #endif /* CONFIG_IOMMU_API */
 469
 470 static inline void kvm_guest_enter(void)
 471 {
 472         account_system_vtime(current);
 473         current->flags |= PF_VCPU;
 474 }
 475
 476 static inline void kvm_guest_exit(void)
 477 {
 478         account_system_vtime(current);
 479         current->flags &= ~PF_VCPU;
 480 }
 481
 482 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
 483 {
 484         return slot - kvm->memslots;
 485 }
 486
 487 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 488 {
 489         return (gpa_t)gfn << PAGE_SHIFT;
 490 }
 491
 492 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 493 {
 494         return (hpa_t)pfn << PAGE_SHIFT;
 495 }
 496
 497 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 498 {
 499         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 500 }
 501
 502 enum kvm_stat_kind {
 503         KVM_STAT_VM,
 504         KVM_STAT_VCPU,
 505 };
 506
 507 struct kvm_stats_debugfs_item {
 508         const char *name;
 509         int offset;
 510         enum kvm_stat_kind kind;
 511         struct dentry *dentry;
 512 };
 513 extern struct kvm_stats_debugfs_item debugfs_entries[];
 514 extern struct dentry *kvm_debugfs_dir;
 515
 516 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 517 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 518 {
 519         if (unlikely(vcpu->kvm->mmu_notifier_count))
 520                 return 1;
 521         /*
 522          * Both reads happen under the mmu_lock and both values are
 523          * modified under mmu_lock, so there's no need of smb_rmb()
 524          * here in between, otherwise mmu_notifier_count should be
 525          * read before mmu_notifier_seq, see
 526          * mmu_notifier_invalidate_range_end write side.
 527          */
 528         if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 529                 return 1;
 530         return 0;
 531 }
 532 #endif
 533
 534 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 535
 536 #define KVM_MAX_IRQ_ROUTES 1024
 537
 538 int kvm_setup_default_irq_routing(struct kvm *kvm);
 539 int kvm_set_irq_routing(struct kvm *kvm,
 540                         const struct kvm_irq_routing_entry *entries,
 541                         unsigned nr,
 542                         unsigned flags);
 543 void kvm_free_irq_routing(struct kvm *kvm);
 544
 545 #else
 546
 547 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 548
 549 #endif
 550
 551 #ifdef CONFIG_HAVE_KVM_EVENTFD
 552
 553 void kvm_eventfd_init(struct kvm *kvm);
 554 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
 555 void kvm_irqfd_release(struct kvm *kvm);
 556 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 557
 558 #else
 559
 560 static inline void kvm_eventfd_init(struct kvm *kvm) {}
 561 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
 562 {
 563         return -EINVAL;
 564 }
 565
 566 static inline void kvm_irqfd_release(struct kvm *kvm) {}
 567 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
 568 {
 569         return -ENOSYS;
 570 }
 571
 572 #endif /* CONFIG_HAVE_KVM_EVENTFD */
 573
 574 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 575 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
 576 {
 577         return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
 578 }
 579 #endif
 580
 581 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
 582
 583 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 584                                   unsigned long arg);
 585
 586 #else
 587
 588 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 589                                                 unsigned long arg)
 590 {
 591         return -ENOTTY;
 592 }
 593
 594 #endif
 595
 596 #endif
 597