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