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 200
  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 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
 120 {
 121         return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
 122 }
 123
 124 struct kvm_kernel_irq_routing_entry {
 125         u32 gsi;
 126         u32 type;
 127         int (*set)(struct kvm_kernel_irq_routing_entry *e,
 128                     struct kvm *kvm, int level);
 129         union {
 130                 struct {
 131                         unsigned irqchip;
 132                         unsigned pin;
 133                 } irqchip;
 134                 struct msi_msg msi;
 135         };
 136         struct list_head link;
 137 };
 138
 139 struct kvm {
 140         spinlock_t mmu_lock;
 141         spinlock_t requests_lock;
 142         struct rw_semaphore slots_lock;
 143         struct mm_struct *mm; /* userspace tied to this vm */
 144         int nmemslots;
 145         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 146                                         KVM_PRIVATE_MEM_SLOTS];
 147 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 148         u32 bsp_vcpu_id;
 149         struct kvm_vcpu *bsp_vcpu;
 150 #endif
 151         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 152         atomic_t online_vcpus;
 153         struct list_head vm_list;
 154         struct mutex lock;
 155         struct kvm_io_bus mmio_bus;
 156         struct kvm_io_bus pio_bus;
 157 #ifdef CONFIG_HAVE_KVM_EVENTFD
 158         struct {
 159                 spinlock_t        lock;
 160                 struct list_head  items;
 161         } irqfds;
 162         struct list_head ioeventfds;
 163 #endif
 164         struct kvm_vm_stat stat;
 165         struct kvm_arch arch;
 166         atomic_t users_count;
 167 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 168         struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
 169         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 170 #endif
 171
 172         struct mutex irq_lock;
 173 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 174         struct list_head irq_routing; /* of kvm_kernel_irq_routing_entry */
 175         struct hlist_head mask_notifier_list;
 176 #endif
 177
 178 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 179         struct mmu_notifier mmu_notifier;
 180         unsigned long mmu_notifier_seq;
 181         long mmu_notifier_count;
 182 #endif
 183 };
 184
 185 /* The guest did something we don't support. */
 186 #define pr_unimpl(vcpu, fmt, ...)                                       \
 187  do {                                                                   \
 188         if (printk_ratelimit())                                         \
 189                 printk(KERN_ERR "kvm: %i: cpu%i " fmt,                  \
 190                        current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 191  } while (0)
 192
 193 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 194 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 195
 196 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 197 {
 198         smp_rmb();
 199         return kvm->vcpus[i];
 200 }
 201
 202 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
 203         for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
 204              idx < atomic_read(&kvm->online_vcpus) && vcpup; \
 205              vcpup = kvm_get_vcpu(kvm, ++idx))
 206
 207 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 208 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 209
 210 void vcpu_load(struct kvm_vcpu *vcpu);
 211 void vcpu_put(struct kvm_vcpu *vcpu);
 212
 213 int kvm_init(void *opaque, unsigned int vcpu_size,
 214                   struct module *module);
 215 void kvm_exit(void);
 216
 217 void kvm_get_kvm(struct kvm *kvm);
 218 void kvm_put_kvm(struct kvm *kvm);
 219
 220 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 221 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 222 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 223 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
 224
 225 extern struct page *bad_page;
 226 extern pfn_t bad_pfn;
 227
 228 int is_error_page(struct page *page);
 229 int is_error_pfn(pfn_t pfn);
 230 int kvm_is_error_hva(unsigned long addr);
 231 int kvm_set_memory_region(struct kvm *kvm,
 232                           struct kvm_userspace_memory_region *mem,
 233                           int user_alloc);
 234 int __kvm_set_memory_region(struct kvm *kvm,
 235                             struct kvm_userspace_memory_region *mem,
 236                             int user_alloc);
 237 int kvm_arch_set_memory_region(struct kvm *kvm,
 238                                 struct kvm_userspace_memory_region *mem,
 239                                 struct kvm_memory_slot old,
 240                                 int user_alloc);
 241 void kvm_disable_largepages(void);
 242 void kvm_arch_flush_shadow(struct kvm *kvm);
 243 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
 244 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 245 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 246 void kvm_release_page_clean(struct page *page);
 247 void kvm_release_page_dirty(struct page *page);
 248 void kvm_set_page_dirty(struct page *page);
 249 void kvm_set_page_accessed(struct page *page);
 250
 251 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 252 void kvm_release_pfn_dirty(pfn_t);
 253 void kvm_release_pfn_clean(pfn_t pfn);
 254 void kvm_set_pfn_dirty(pfn_t pfn);
 255 void kvm_set_pfn_accessed(pfn_t pfn);
 256 void kvm_get_pfn(pfn_t pfn);
 257
 258 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 259                         int len);
 260 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 261                           unsigned long len);
 262 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 263 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 264                          int offset, int len);
 265 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 266                     unsigned long len);
 267 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 268 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 269 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 270 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 271 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 272
 273 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 274 void kvm_resched(struct kvm_vcpu *vcpu);
 275 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 276 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 277 void kvm_flush_remote_tlbs(struct kvm *kvm);
 278 void kvm_reload_remote_mmus(struct kvm *kvm);
 279
 280 long kvm_arch_dev_ioctl(struct file *filp,
 281                         unsigned int ioctl, unsigned long arg);
 282 long kvm_arch_vcpu_ioctl(struct file *filp,
 283                          unsigned int ioctl, unsigned long arg);
 284
 285 int kvm_dev_ioctl_check_extension(long ext);
 286
 287 int kvm_get_dirty_log(struct kvm *kvm,
 288                         struct kvm_dirty_log *log, int *is_dirty);
 289 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 290                                 struct kvm_dirty_log *log);
 291
 292 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 293                                    struct
 294                                    kvm_userspace_memory_region *mem,
 295                                    int user_alloc);
 296 long kvm_arch_vm_ioctl(struct file *filp,
 297                        unsigned int ioctl, unsigned long arg);
 298
 299 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 300 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 301
 302 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 303                                     struct kvm_translation *tr);
 304
 305 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 306 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 307 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 308                                   struct kvm_sregs *sregs);
 309 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 310                                   struct kvm_sregs *sregs);
 311 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 312                                     struct kvm_mp_state *mp_state);
 313 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 314                                     struct kvm_mp_state *mp_state);
 315 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 316                                         struct kvm_guest_debug *dbg);
 317 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 318
 319 int kvm_arch_init(void *opaque);
 320 void kvm_arch_exit(void);
 321
 322 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 323 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 324
 325 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 326 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 327 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 328 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 329 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 330 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 331
 332 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 333 void kvm_arch_hardware_enable(void *garbage);
 334 void kvm_arch_hardware_disable(void *garbage);
 335 int kvm_arch_hardware_setup(void);
 336 void kvm_arch_hardware_unsetup(void);
 337 void kvm_arch_check_processor_compat(void *rtn);
 338 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 339
 340 void kvm_free_physmem(struct kvm *kvm);
 341
 342 struct  kvm *kvm_arch_create_vm(void);
 343 void kvm_arch_destroy_vm(struct kvm *kvm);
 344 void kvm_free_all_assigned_devices(struct kvm *kvm);
 345 void kvm_arch_sync_events(struct kvm *kvm);
 346
 347 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 348 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 349
 350 int kvm_is_mmio_pfn(pfn_t pfn);
 351
 352 struct kvm_irq_ack_notifier {
 353         struct hlist_node link;
 354         unsigned gsi;
 355         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 356 };
 357
 358 #define KVM_ASSIGNED_MSIX_PENDING               0x1
 359 struct kvm_guest_msix_entry {
 360         u32 vector;
 361         u16 entry;
 362         u16 flags;
 363 };
 364
 365 struct kvm_assigned_dev_kernel {
 366         struct kvm_irq_ack_notifier ack_notifier;
 367         struct work_struct interrupt_work;
 368         struct list_head list;
 369         int assigned_dev_id;
 370         int host_busnr;
 371         int host_devfn;
 372         unsigned int entries_nr;
 373         int host_irq;
 374         bool host_irq_disabled;
 375         struct msix_entry *host_msix_entries;
 376         int guest_irq;
 377         struct kvm_guest_msix_entry *guest_msix_entries;
 378         unsigned long irq_requested_type;
 379         int irq_source_id;
 380         int flags;
 381         struct pci_dev *dev;
 382         struct kvm *kvm;
 383         spinlock_t assigned_dev_lock;
 384 };
 385
 386 struct kvm_irq_mask_notifier {
 387         void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 388         int irq;
 389         struct hlist_node link;
 390 };
 391
 392 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 393                                     struct kvm_irq_mask_notifier *kimn);
 394 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 395                                       struct kvm_irq_mask_notifier *kimn);
 396 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
 397
 398 int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level);
 399 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 400 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 401                                    struct kvm_irq_ack_notifier *kian);
 402 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 403                                    struct kvm_irq_ack_notifier *kian);
 404 int kvm_request_irq_source_id(struct kvm *kvm);
 405 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 406
 407 /* For vcpu->arch.iommu_flags */
 408 #define KVM_IOMMU_CACHE_COHERENCY       0x1
 409
 410 #ifdef CONFIG_IOMMU_API
 411 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn,
 412                         unsigned long npages);
 413 int kvm_iommu_map_guest(struct kvm *kvm);
 414 int kvm_iommu_unmap_guest(struct kvm *kvm);
 415 int kvm_assign_device(struct kvm *kvm,
 416                       struct kvm_assigned_dev_kernel *assigned_dev);
 417 int kvm_deassign_device(struct kvm *kvm,
 418                         struct kvm_assigned_dev_kernel *assigned_dev);
 419 #else /* CONFIG_IOMMU_API */
 420 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 421                                       gfn_t base_gfn,
 422                                       unsigned long npages)
 423 {
 424         return 0;
 425 }
 426
 427 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 428 {
 429         return -ENODEV;
 430 }
 431
 432 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 433 {
 434         return 0;
 435 }
 436
 437 static inline int kvm_assign_device(struct kvm *kvm,
 438                 struct kvm_assigned_dev_kernel *assigned_dev)
 439 {
 440         return 0;
 441 }
 442
 443 static inline int kvm_deassign_device(struct kvm *kvm,
 444                 struct kvm_assigned_dev_kernel *assigned_dev)
 445 {
 446         return 0;
 447 }
 448 #endif /* CONFIG_IOMMU_API */
 449
 450 static inline void kvm_guest_enter(void)
 451 {
 452         account_system_vtime(current);
 453         current->flags |= PF_VCPU;
 454 }
 455
 456 static inline void kvm_guest_exit(void)
 457 {
 458         account_system_vtime(current);
 459         current->flags &= ~PF_VCPU;
 460 }
 461
 462 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
 463 {
 464         return slot - kvm->memslots;
 465 }
 466
 467 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 468 {
 469         return (gpa_t)gfn << PAGE_SHIFT;
 470 }
 471
 472 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 473 {
 474         return (hpa_t)pfn << PAGE_SHIFT;
 475 }
 476
 477 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 478 {
 479         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 480 }
 481
 482 enum kvm_stat_kind {
 483         KVM_STAT_VM,
 484         KVM_STAT_VCPU,
 485 };
 486
 487 struct kvm_stats_debugfs_item {
 488         const char *name;
 489         int offset;
 490         enum kvm_stat_kind kind;
 491         struct dentry *dentry;
 492 };
 493 extern struct kvm_stats_debugfs_item debugfs_entries[];
 494 extern struct dentry *kvm_debugfs_dir;
 495
 496 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 497 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 498 {
 499         if (unlikely(vcpu->kvm->mmu_notifier_count))
 500                 return 1;
 501         /*
 502          * Both reads happen under the mmu_lock and both values are
 503          * modified under mmu_lock, so there's no need of smb_rmb()
 504          * here in between, otherwise mmu_notifier_count should be
 505          * read before mmu_notifier_seq, see
 506          * mmu_notifier_invalidate_range_end write side.
 507          */
 508         if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 509                 return 1;
 510         return 0;
 511 }
 512 #endif
 513
 514 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 515
 516 #define KVM_MAX_IRQ_ROUTES 1024
 517
 518 int kvm_setup_default_irq_routing(struct kvm *kvm);
 519 int kvm_set_irq_routing(struct kvm *kvm,
 520                         const struct kvm_irq_routing_entry *entries,
 521                         unsigned nr,
 522                         unsigned flags);
 523 void kvm_free_irq_routing(struct kvm *kvm);
 524
 525 #else
 526
 527 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 528
 529 #endif
 530
 531 #ifdef CONFIG_HAVE_KVM_EVENTFD
 532
 533 void kvm_eventfd_init(struct kvm *kvm);
 534 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
 535 void kvm_irqfd_release(struct kvm *kvm);
 536 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 537
 538 #else
 539
 540 static inline void kvm_eventfd_init(struct kvm *kvm) {}
 541 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
 542 {
 543         return -EINVAL;
 544 }
 545
 546 static inline void kvm_irqfd_release(struct kvm *kvm) {}
 547 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
 548 {
 549         return -ENOSYS;
 550 }
 551
 552 #endif /* CONFIG_HAVE_KVM_EVENTFD */
 553
 554 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 555 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
 556 {
 557         return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
 558 }
 559 #endif
 560 #endif