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/marker.h>
  19 #include <linux/msi.h>
  20 #include <asm/signal.h>
  21
  22 #include <linux/kvm.h>
  23 #include <linux/kvm_para.h>
  24
  25 #include <linux/kvm_types.h>
  26
  27 #include <asm/kvm_host.h>
  28
  29 /*
  30  * vcpu->requests bit members
  31  */
  32 #define KVM_REQ_TLB_FLUSH          0
  33 #define KVM_REQ_MIGRATE_TIMER      1
  34 #define KVM_REQ_REPORT_TPR_ACCESS  2
  35 #define KVM_REQ_MMU_RELOAD         3
  36 #define KVM_REQ_TRIPLE_FAULT       4
  37 #define KVM_REQ_PENDING_TIMER      5
  38 #define KVM_REQ_UNHALT             6
  39 #define KVM_REQ_MMU_SYNC           7
  40 #define KVM_REQ_KVMCLOCK_UPDATE    8
  41 #define KVM_REQ_KICK               9
  42
  43 #define KVM_USERSPACE_IRQ_SOURCE_ID     0
  44
  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 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus,
  63                                           gpa_t addr, int len, int is_write);
  64 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
  65                              struct kvm_io_device *dev);
  66
  67 struct kvm_vcpu {
  68         struct kvm *kvm;
  69 #ifdef CONFIG_PREEMPT_NOTIFIERS
  70         struct preempt_notifier preempt_notifier;
  71 #endif
  72         int vcpu_id;
  73         struct mutex mutex;
  74         int   cpu;
  75         struct kvm_run *run;
  76         unsigned long requests;
  77         unsigned long guest_debug;
  78         int fpu_active;
  79         int guest_fpu_loaded;
  80         wait_queue_head_t wq;
  81         int sigset_active;
  82         sigset_t sigset;
  83         struct kvm_vcpu_stat stat;
  84
  85 #ifdef CONFIG_HAS_IOMEM
  86         int mmio_needed;
  87         int mmio_read_completed;
  88         int mmio_is_write;
  89         int mmio_size;
  90         unsigned char mmio_data[8];
  91         gpa_t mmio_phys_addr;
  92 #endif
  93
  94         struct kvm_vcpu_arch arch;
  95 };
  96
  97 struct kvm_memory_slot {
  98         gfn_t base_gfn;
  99         unsigned long npages;
 100         unsigned long flags;
 101         unsigned long *rmap;
 102         unsigned long *dirty_bitmap;
 103         struct {
 104                 unsigned long rmap_pde;
 105                 int write_count;
 106         } *lpage_info;
 107         unsigned long userspace_addr;
 108         int user_alloc;
 109 };
 110
 111 struct kvm_kernel_irq_routing_entry {
 112         u32 gsi;
 113         u32 type;
 114         int (*set)(struct kvm_kernel_irq_routing_entry *e,
 115                     struct kvm *kvm, int level);
 116         union {
 117                 struct {
 118                         unsigned irqchip;
 119                         unsigned pin;
 120                 } irqchip;
 121                 struct msi_msg msi;
 122         };
 123         struct list_head link;
 124 };
 125
 126 struct kvm {
 127         spinlock_t mmu_lock;
 128         spinlock_t requests_lock;
 129         struct rw_semaphore slots_lock;
 130         struct mm_struct *mm; /* userspace tied to this vm */
 131         int nmemslots;
 132         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 133                                         KVM_PRIVATE_MEM_SLOTS];
 134 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 135         u32 bsp_vcpu_id;
 136         struct kvm_vcpu *bsp_vcpu;
 137 #endif
 138         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 139         atomic_t online_vcpus;
 140         struct list_head vm_list;
 141         struct mutex lock;
 142         struct kvm_io_bus mmio_bus;
 143         struct kvm_io_bus pio_bus;
 144 #ifdef CONFIG_HAVE_KVM_EVENTFD
 145         struct {
 146                 spinlock_t        lock;
 147                 struct list_head  items;
 148         } irqfds;
 149 #endif
 150         struct kvm_vm_stat stat;
 151         struct kvm_arch arch;
 152         atomic_t users_count;
 153 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 154         struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
 155         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 156 #endif
 157
 158         struct mutex irq_lock;
 159 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 160         struct list_head irq_routing; /* of kvm_kernel_irq_routing_entry */
 161         struct hlist_head mask_notifier_list;
 162 #endif
 163
 164 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 165         struct mmu_notifier mmu_notifier;
 166         unsigned long mmu_notifier_seq;
 167         long mmu_notifier_count;
 168 #endif
 169 };
 170
 171 /* The guest did something we don't support. */
 172 #define pr_unimpl(vcpu, fmt, ...)                                       \
 173  do {                                                                   \
 174         if (printk_ratelimit())                                         \
 175                 printk(KERN_ERR "kvm: %i: cpu%i " fmt,                  \
 176                        current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 177  } while (0)
 178
 179 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 180 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 181
 182 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 183 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 184
 185 void vcpu_load(struct kvm_vcpu *vcpu);
 186 void vcpu_put(struct kvm_vcpu *vcpu);
 187
 188 int kvm_init(void *opaque, unsigned int vcpu_size,
 189                   struct module *module);
 190 void kvm_exit(void);
 191
 192 void kvm_get_kvm(struct kvm *kvm);
 193 void kvm_put_kvm(struct kvm *kvm);
 194
 195 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 196 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 197 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 198 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
 199
 200 extern struct page *bad_page;
 201 extern pfn_t bad_pfn;
 202
 203 int is_error_page(struct page *page);
 204 int is_error_pfn(pfn_t pfn);
 205 int kvm_is_error_hva(unsigned long addr);
 206 int kvm_set_memory_region(struct kvm *kvm,
 207                           struct kvm_userspace_memory_region *mem,
 208                           int user_alloc);
 209 int __kvm_set_memory_region(struct kvm *kvm,
 210                             struct kvm_userspace_memory_region *mem,
 211                             int user_alloc);
 212 int kvm_arch_set_memory_region(struct kvm *kvm,
 213                                 struct kvm_userspace_memory_region *mem,
 214                                 struct kvm_memory_slot old,
 215                                 int user_alloc);
 216 void kvm_arch_flush_shadow(struct kvm *kvm);
 217 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
 218 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 219 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 220 void kvm_release_page_clean(struct page *page);
 221 void kvm_release_page_dirty(struct page *page);
 222 void kvm_set_page_dirty(struct page *page);
 223 void kvm_set_page_accessed(struct page *page);
 224
 225 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 226 void kvm_release_pfn_dirty(pfn_t);
 227 void kvm_release_pfn_clean(pfn_t pfn);
 228 void kvm_set_pfn_dirty(pfn_t pfn);
 229 void kvm_set_pfn_accessed(pfn_t pfn);
 230 void kvm_get_pfn(pfn_t pfn);
 231
 232 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 233                         int len);
 234 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 235                           unsigned long len);
 236 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 237 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 238                          int offset, int len);
 239 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 240                     unsigned long len);
 241 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 242 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 243 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 244 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 245 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 246
 247 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 248 void kvm_resched(struct kvm_vcpu *vcpu);
 249 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 250 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 251 void kvm_flush_remote_tlbs(struct kvm *kvm);
 252 void kvm_reload_remote_mmus(struct kvm *kvm);
 253
 254 long kvm_arch_dev_ioctl(struct file *filp,
 255                         unsigned int ioctl, unsigned long arg);
 256 long kvm_arch_vcpu_ioctl(struct file *filp,
 257                          unsigned int ioctl, unsigned long arg);
 258
 259 int kvm_dev_ioctl_check_extension(long ext);
 260
 261 int kvm_get_dirty_log(struct kvm *kvm,
 262                         struct kvm_dirty_log *log, int *is_dirty);
 263 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 264                                 struct kvm_dirty_log *log);
 265
 266 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 267                                    struct
 268                                    kvm_userspace_memory_region *mem,
 269                                    int user_alloc);
 270 long kvm_arch_vm_ioctl(struct file *filp,
 271                        unsigned int ioctl, unsigned long arg);
 272
 273 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 274 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 275
 276 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 277                                     struct kvm_translation *tr);
 278
 279 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 280 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 281 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 282                                   struct kvm_sregs *sregs);
 283 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 284                                   struct kvm_sregs *sregs);
 285 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 286                                     struct kvm_mp_state *mp_state);
 287 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 288                                     struct kvm_mp_state *mp_state);
 289 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 290                                         struct kvm_guest_debug *dbg);
 291 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 292
 293 int kvm_arch_init(void *opaque);
 294 void kvm_arch_exit(void);
 295
 296 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 297 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 298
 299 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 300 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 301 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 302 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 303 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 304 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 305
 306 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 307 void kvm_arch_hardware_enable(void *garbage);
 308 void kvm_arch_hardware_disable(void *garbage);
 309 int kvm_arch_hardware_setup(void);
 310 void kvm_arch_hardware_unsetup(void);
 311 void kvm_arch_check_processor_compat(void *rtn);
 312 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 313 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
 314
 315 void kvm_free_physmem(struct kvm *kvm);
 316
 317 struct  kvm *kvm_arch_create_vm(void);
 318 void kvm_arch_destroy_vm(struct kvm *kvm);
 319 void kvm_free_all_assigned_devices(struct kvm *kvm);
 320 void kvm_arch_sync_events(struct kvm *kvm);
 321
 322 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
 323 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
 324 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 325 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 326
 327 int kvm_is_mmio_pfn(pfn_t pfn);
 328
 329 struct kvm_irq_ack_notifier {
 330         struct hlist_node link;
 331         unsigned gsi;
 332         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 333 };
 334
 335 #define KVM_ASSIGNED_MSIX_PENDING               0x1
 336 struct kvm_guest_msix_entry {
 337         u32 vector;
 338         u16 entry;
 339         u16 flags;
 340 };
 341
 342 struct kvm_assigned_dev_kernel {
 343         struct kvm_irq_ack_notifier ack_notifier;
 344         struct work_struct interrupt_work;
 345         struct list_head list;
 346         int assigned_dev_id;
 347         int host_busnr;
 348         int host_devfn;
 349         unsigned int entries_nr;
 350         int host_irq;
 351         bool host_irq_disabled;
 352         struct msix_entry *host_msix_entries;
 353         int guest_irq;
 354         struct kvm_guest_msix_entry *guest_msix_entries;
 355         unsigned long irq_requested_type;
 356         int irq_source_id;
 357         int flags;
 358         struct pci_dev *dev;
 359         struct kvm *kvm;
 360         spinlock_t assigned_dev_lock;
 361 };
 362
 363 struct kvm_irq_mask_notifier {
 364         void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 365         int irq;
 366         struct hlist_node link;
 367 };
 368
 369 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 370                                     struct kvm_irq_mask_notifier *kimn);
 371 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 372                                       struct kvm_irq_mask_notifier *kimn);
 373 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
 374
 375 int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level);
 376 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 377 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 378                                    struct kvm_irq_ack_notifier *kian);
 379 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 380                                    struct kvm_irq_ack_notifier *kian);
 381 int kvm_request_irq_source_id(struct kvm *kvm);
 382 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 383
 384 /* For vcpu->arch.iommu_flags */
 385 #define KVM_IOMMU_CACHE_COHERENCY       0x1
 386
 387 #ifdef CONFIG_IOMMU_API
 388 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn,
 389                         unsigned long npages);
 390 int kvm_iommu_map_guest(struct kvm *kvm);
 391 int kvm_iommu_unmap_guest(struct kvm *kvm);
 392 int kvm_assign_device(struct kvm *kvm,
 393                       struct kvm_assigned_dev_kernel *assigned_dev);
 394 int kvm_deassign_device(struct kvm *kvm,
 395                         struct kvm_assigned_dev_kernel *assigned_dev);
 396 #else /* CONFIG_IOMMU_API */
 397 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 398                                       gfn_t base_gfn,
 399                                       unsigned long npages)
 400 {
 401         return 0;
 402 }
 403
 404 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 405 {
 406         return -ENODEV;
 407 }
 408
 409 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 410 {
 411         return 0;
 412 }
 413
 414 static inline int kvm_assign_device(struct kvm *kvm,
 415                 struct kvm_assigned_dev_kernel *assigned_dev)
 416 {
 417         return 0;
 418 }
 419
 420 static inline int kvm_deassign_device(struct kvm *kvm,
 421                 struct kvm_assigned_dev_kernel *assigned_dev)
 422 {
 423         return 0;
 424 }
 425 #endif /* CONFIG_IOMMU_API */
 426
 427 static inline void kvm_guest_enter(void)
 428 {
 429         account_system_vtime(current);
 430         current->flags |= PF_VCPU;
 431 }
 432
 433 static inline void kvm_guest_exit(void)
 434 {
 435         account_system_vtime(current);
 436         current->flags &= ~PF_VCPU;
 437 }
 438
 439 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
 440 {
 441         return slot - kvm->memslots;
 442 }
 443
 444 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 445 {
 446         return (gpa_t)gfn << PAGE_SHIFT;
 447 }
 448
 449 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 450 {
 451         return (hpa_t)pfn << PAGE_SHIFT;
 452 }
 453
 454 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 455 {
 456         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 457 }
 458
 459 enum kvm_stat_kind {
 460         KVM_STAT_VM,
 461         KVM_STAT_VCPU,
 462 };
 463
 464 struct kvm_stats_debugfs_item {
 465         const char *name;
 466         int offset;
 467         enum kvm_stat_kind kind;
 468         struct dentry *dentry;
 469 };
 470 extern struct kvm_stats_debugfs_item debugfs_entries[];
 471 extern struct dentry *kvm_debugfs_dir;
 472
 473 #define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \
 474         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 475                                                 vcpu, 5, d1, d2, d3, d4, d5)
 476 #define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \
 477         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 478                                                 vcpu, 4, d1, d2, d3, d4, 0)
 479 #define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \
 480         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 481                                                 vcpu, 3, d1, d2, d3, 0, 0)
 482 #define KVMTRACE_2D(evt, vcpu, d1, d2, name) \
 483         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 484                                                 vcpu, 2, d1, d2, 0, 0, 0)
 485 #define KVMTRACE_1D(evt, vcpu, d1, name) \
 486         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 487                                                 vcpu, 1, d1, 0, 0, 0, 0)
 488 #define KVMTRACE_0D(evt, vcpu, name) \
 489         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 490                                                 vcpu, 0, 0, 0, 0, 0, 0)
 491
 492 #ifdef CONFIG_KVM_TRACE
 493 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg);
 494 void kvm_trace_cleanup(void);
 495 #else
 496 static inline
 497 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg)
 498 {
 499         return -EINVAL;
 500 }
 501 #define kvm_trace_cleanup() ((void)0)
 502 #endif
 503
 504 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 505 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 506 {
 507         if (unlikely(vcpu->kvm->mmu_notifier_count))
 508                 return 1;
 509         /*
 510          * Both reads happen under the mmu_lock and both values are
 511          * modified under mmu_lock, so there's no need of smb_rmb()
 512          * here in between, otherwise mmu_notifier_count should be
 513          * read before mmu_notifier_seq, see
 514          * mmu_notifier_invalidate_range_end write side.
 515          */
 516         if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 517                 return 1;
 518         return 0;
 519 }
 520 #endif
 521
 522 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 523
 524 #define KVM_MAX_IRQ_ROUTES 1024
 525
 526 int kvm_setup_default_irq_routing(struct kvm *kvm);
 527 int kvm_set_irq_routing(struct kvm *kvm,
 528                         const struct kvm_irq_routing_entry *entries,
 529                         unsigned nr,
 530                         unsigned flags);
 531 void kvm_free_irq_routing(struct kvm *kvm);
 532
 533 #else
 534
 535 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 536
 537 #endif
 538
 539 #ifdef CONFIG_HAVE_KVM_EVENTFD
 540
 541 void kvm_irqfd_init(struct kvm *kvm);
 542 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
 543 void kvm_irqfd_release(struct kvm *kvm);
 544
 545 #else
 546
 547 static inline void kvm_irqfd_init(struct kvm *kvm) {}
 548 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
 549 {
 550         return -EINVAL;
 551 }
 552
 553 static inline void kvm_irqfd_release(struct kvm *kvm) {}
 554
 555 #endif /* CONFIG_HAVE_KVM_EVENTFD */
 556
 557 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 558 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
 559 {
 560         return vcpu->kvm->bsp_vcpu == vcpu;
 561 }
 562 #endif
 563 #endif