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 #define KVM_REQ_DEACTIVATE_FPU    10
  42
  43 #define KVM_USERSPACE_IRQ_SOURCE_ID     0
  44
  45 struct kvm;
  46 struct kvm_vcpu;
  47 extern struct kmem_cache *kvm_vcpu_cache;
  48
  49 /*
  50  * It would be nice to use something smarter than a linear search, TBD...
  51  * Thankfully we dont expect many devices to register (famous last words :),
  52  * so until then it will suffice.  At least its abstracted so we can change
  53  * in one place.
  54  */
  55 struct kvm_io_bus {
  56         int                   dev_count;
  57 #define NR_IOBUS_DEVS 6
  58         struct kvm_io_device *devs[NR_IOBUS_DEVS];
  59 };
  60
  61 enum kvm_bus {
  62         KVM_MMIO_BUS,
  63         KVM_PIO_BUS,
  64         KVM_NR_BUSES
  65 };
  66
  67 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
  68                      int len, const void *val);
  69 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
  70                     void *val);
  71 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx,
  72                             struct kvm_io_device *dev);
  73 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
  74                               struct kvm_io_device *dev);
  75
  76 struct kvm_vcpu {
  77         struct kvm *kvm;
  78 #ifdef CONFIG_PREEMPT_NOTIFIERS
  79         struct preempt_notifier preempt_notifier;
  80 #endif
  81         int vcpu_id;
  82         struct mutex mutex;
  83         int   cpu;
  84         struct kvm_run *run;
  85         unsigned long requests;
  86         unsigned long guest_debug;
  87         int srcu_idx;
  88
  89         int fpu_active;
  90         int guest_fpu_loaded;
  91         wait_queue_head_t wq;
  92         int sigset_active;
  93         sigset_t sigset;
  94         struct kvm_vcpu_stat stat;
  95
  96 #ifdef CONFIG_HAS_IOMEM
  97         int mmio_needed;
  98         int mmio_read_completed;
  99         int mmio_is_write;
 100         int mmio_size;
 101         unsigned char mmio_data[8];
 102         gpa_t mmio_phys_addr;
 103 #endif
 104
 105         struct kvm_vcpu_arch arch;
 106 };
 107
 108 struct kvm_memory_slot {
 109         gfn_t base_gfn;
 110         unsigned long npages;
 111         unsigned long flags;
 112         unsigned long *rmap;
 113         unsigned long *dirty_bitmap;
 114         struct {
 115                 unsigned long rmap_pde;
 116                 int write_count;
 117         } *lpage_info[KVM_NR_PAGE_SIZES - 1];
 118         unsigned long userspace_addr;
 119         int user_alloc;
 120 };
 121
 122 struct kvm_kernel_irq_routing_entry {
 123         u32 gsi;
 124         u32 type;
 125         int (*set)(struct kvm_kernel_irq_routing_entry *e,
 126                    struct kvm *kvm, int irq_source_id, int level);
 127         union {
 128                 struct {
 129                         unsigned irqchip;
 130                         unsigned pin;
 131                 } irqchip;
 132                 struct msi_msg msi;
 133         };
 134         struct hlist_node link;
 135 };
 136
 137 #ifdef __KVM_HAVE_IOAPIC
 138
 139 struct kvm_irq_routing_table {
 140         int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
 141         struct kvm_kernel_irq_routing_entry *rt_entries;
 142         u32 nr_rt_entries;
 143         /*
 144          * Array indexed by gsi. Each entry contains list of irq chips
 145          * the gsi is connected to.
 146          */
 147         struct hlist_head map[0];
 148 };
 149
 150 #else
 151
 152 struct kvm_irq_routing_table {};
 153
 154 #endif
 155
 156 struct kvm_memslots {
 157         int nmemslots;
 158         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 159                                         KVM_PRIVATE_MEM_SLOTS];
 160 };
 161
 162 struct kvm {
 163         spinlock_t mmu_lock;
 164         spinlock_t requests_lock;
 165         struct mutex slots_lock;
 166         struct mm_struct *mm; /* userspace tied to this vm */
 167         struct kvm_memslots *memslots;
 168         struct srcu_struct srcu;
 169 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 170         u32 bsp_vcpu_id;
 171         struct kvm_vcpu *bsp_vcpu;
 172 #endif
 173         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 174         atomic_t online_vcpus;
 175         struct list_head vm_list;
 176         struct mutex lock;
 177         struct kvm_io_bus *buses[KVM_NR_BUSES];
 178 #ifdef CONFIG_HAVE_KVM_EVENTFD
 179         struct {
 180                 spinlock_t        lock;
 181                 struct list_head  items;
 182         } irqfds;
 183         struct list_head ioeventfds;
 184 #endif
 185         struct kvm_vm_stat stat;
 186         struct kvm_arch arch;
 187         atomic_t users_count;
 188 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 189         struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
 190         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 191 #endif
 192
 193         struct mutex irq_lock;
 194 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 195         struct kvm_irq_routing_table *irq_routing;
 196         struct hlist_head mask_notifier_list;
 197         struct hlist_head irq_ack_notifier_list;
 198 #endif
 199
 200 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 201         struct mmu_notifier mmu_notifier;
 202         unsigned long mmu_notifier_seq;
 203         long mmu_notifier_count;
 204 #endif
 205 };
 206
 207 /* The guest did something we don't support. */
 208 #define pr_unimpl(vcpu, fmt, ...)                                       \
 209  do {                                                                   \
 210         if (printk_ratelimit())                                         \
 211                 printk(KERN_ERR "kvm: %i: cpu%i " fmt,                  \
 212                        current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 213  } while (0)
 214
 215 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 216 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 217
 218 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 219 {
 220         smp_rmb();
 221         return kvm->vcpus[i];
 222 }
 223
 224 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
 225         for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
 226              idx < atomic_read(&kvm->online_vcpus) && vcpup; \
 227              vcpup = kvm_get_vcpu(kvm, ++idx))
 228
 229 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 230 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 231
 232 void vcpu_load(struct kvm_vcpu *vcpu);
 233 void vcpu_put(struct kvm_vcpu *vcpu);
 234
 235 int kvm_init(void *opaque, unsigned int vcpu_size,
 236                   struct module *module);
 237 void kvm_exit(void);
 238
 239 void kvm_get_kvm(struct kvm *kvm);
 240 void kvm_put_kvm(struct kvm *kvm);
 241
 242 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 243 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 244 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 245 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
 246
 247 extern struct page *bad_page;
 248 extern pfn_t bad_pfn;
 249
 250 int is_error_page(struct page *page);
 251 int is_error_pfn(pfn_t pfn);
 252 int kvm_is_error_hva(unsigned long addr);
 253 int kvm_set_memory_region(struct kvm *kvm,
 254                           struct kvm_userspace_memory_region *mem,
 255                           int user_alloc);
 256 int __kvm_set_memory_region(struct kvm *kvm,
 257                             struct kvm_userspace_memory_region *mem,
 258                             int user_alloc);
 259 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 260                                 struct kvm_memory_slot *memslot,
 261                                 struct kvm_memory_slot old,
 262                                 struct kvm_userspace_memory_region *mem,
 263                                 int user_alloc);
 264 void kvm_arch_commit_memory_region(struct kvm *kvm,
 265                                 struct kvm_userspace_memory_region *mem,
 266                                 struct kvm_memory_slot old,
 267                                 int user_alloc);
 268 void kvm_disable_largepages(void);
 269 void kvm_arch_flush_shadow(struct kvm *kvm);
 270 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
 271 gfn_t unalias_gfn_instantiation(struct kvm *kvm, gfn_t gfn);
 272
 273 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 274 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 275 void kvm_release_page_clean(struct page *page);
 276 void kvm_release_page_dirty(struct page *page);
 277 void kvm_set_page_dirty(struct page *page);
 278 void kvm_set_page_accessed(struct page *page);
 279
 280 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 281 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
 282                          struct kvm_memory_slot *slot, gfn_t gfn);
 283 int memslot_id(struct kvm *kvm, gfn_t gfn);
 284 void kvm_release_pfn_dirty(pfn_t);
 285 void kvm_release_pfn_clean(pfn_t pfn);
 286 void kvm_set_pfn_dirty(pfn_t pfn);
 287 void kvm_set_pfn_accessed(pfn_t pfn);
 288 void kvm_get_pfn(pfn_t pfn);
 289
 290 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 291                         int len);
 292 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 293                           unsigned long len);
 294 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 295 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 296                          int offset, int len);
 297 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 298                     unsigned long len);
 299 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 300 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 301 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 302 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 303 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 304
 305 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 306 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
 307 void kvm_resched(struct kvm_vcpu *vcpu);
 308 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 309 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 310 void kvm_flush_remote_tlbs(struct kvm *kvm);
 311 void kvm_reload_remote_mmus(struct kvm *kvm);
 312
 313 long kvm_arch_dev_ioctl(struct file *filp,
 314                         unsigned int ioctl, unsigned long arg);
 315 long kvm_arch_vcpu_ioctl(struct file *filp,
 316                          unsigned int ioctl, unsigned long arg);
 317
 318 int kvm_dev_ioctl_check_extension(long ext);
 319
 320 int kvm_get_dirty_log(struct kvm *kvm,
 321                         struct kvm_dirty_log *log, int *is_dirty);
 322 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 323                                 struct kvm_dirty_log *log);
 324
 325 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 326                                    struct
 327                                    kvm_userspace_memory_region *mem,
 328                                    int user_alloc);
 329 long kvm_arch_vm_ioctl(struct file *filp,
 330                        unsigned int ioctl, unsigned long arg);
 331
 332 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 333 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 334
 335 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 336                                     struct kvm_translation *tr);
 337
 338 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 339 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 340 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 341                                   struct kvm_sregs *sregs);
 342 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 343                                   struct kvm_sregs *sregs);
 344 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 345                                     struct kvm_mp_state *mp_state);
 346 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 347                                     struct kvm_mp_state *mp_state);
 348 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 349                                         struct kvm_guest_debug *dbg);
 350 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 351
 352 int kvm_arch_init(void *opaque);
 353 void kvm_arch_exit(void);
 354
 355 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 356 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 357
 358 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 359 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 360 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 361 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 362 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 363 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 364
 365 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 366 int kvm_arch_hardware_enable(void *garbage);
 367 void kvm_arch_hardware_disable(void *garbage);
 368 int kvm_arch_hardware_setup(void);
 369 void kvm_arch_hardware_unsetup(void);
 370 void kvm_arch_check_processor_compat(void *rtn);
 371 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 372
 373 void kvm_free_physmem(struct kvm *kvm);
 374
 375 struct  kvm *kvm_arch_create_vm(void);
 376 void kvm_arch_destroy_vm(struct kvm *kvm);
 377 void kvm_free_all_assigned_devices(struct kvm *kvm);
 378 void kvm_arch_sync_events(struct kvm *kvm);
 379
 380 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 381 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 382
 383 int kvm_is_mmio_pfn(pfn_t pfn);
 384
 385 struct kvm_irq_ack_notifier {
 386         struct hlist_node link;
 387         unsigned gsi;
 388         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 389 };
 390
 391 #define KVM_ASSIGNED_MSIX_PENDING               0x1
 392 struct kvm_guest_msix_entry {
 393         u32 vector;
 394         u16 entry;
 395         u16 flags;
 396 };
 397
 398 struct kvm_assigned_dev_kernel {
 399         struct kvm_irq_ack_notifier ack_notifier;
 400         struct work_struct interrupt_work;
 401         struct list_head list;
 402         int assigned_dev_id;
 403         int host_busnr;
 404         int host_devfn;
 405         unsigned int entries_nr;
 406         int host_irq;
 407         bool host_irq_disabled;
 408         struct msix_entry *host_msix_entries;
 409         int guest_irq;
 410         struct kvm_guest_msix_entry *guest_msix_entries;
 411         unsigned long irq_requested_type;
 412         int irq_source_id;
 413         int flags;
 414         struct pci_dev *dev;
 415         struct kvm *kvm;
 416         spinlock_t assigned_dev_lock;
 417 };
 418
 419 struct kvm_irq_mask_notifier {
 420         void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 421         int irq;
 422         struct hlist_node link;
 423 };
 424
 425 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 426                                     struct kvm_irq_mask_notifier *kimn);
 427 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 428                                       struct kvm_irq_mask_notifier *kimn);
 429 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
 430
 431 #ifdef __KVM_HAVE_IOAPIC
 432 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
 433                                    union kvm_ioapic_redirect_entry *entry,
 434                                    unsigned long *deliver_bitmask);
 435 #endif
 436 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 437 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 438 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 439                                    struct kvm_irq_ack_notifier *kian);
 440 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 441                                    struct kvm_irq_ack_notifier *kian);
 442 int kvm_request_irq_source_id(struct kvm *kvm);
 443 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 444
 445 /* For vcpu->arch.iommu_flags */
 446 #define KVM_IOMMU_CACHE_COHERENCY       0x1
 447
 448 #ifdef CONFIG_IOMMU_API
 449 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 450 int kvm_iommu_map_guest(struct kvm *kvm);
 451 int kvm_iommu_unmap_guest(struct kvm *kvm);
 452 int kvm_assign_device(struct kvm *kvm,
 453                       struct kvm_assigned_dev_kernel *assigned_dev);
 454 int kvm_deassign_device(struct kvm *kvm,
 455                         struct kvm_assigned_dev_kernel *assigned_dev);
 456 #else /* CONFIG_IOMMU_API */
 457 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 458                                       gfn_t base_gfn,
 459                                       unsigned long npages)
 460 {
 461         return 0;
 462 }
 463
 464 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 465 {
 466         return -ENODEV;
 467 }
 468
 469 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 470 {
 471         return 0;
 472 }
 473
 474 static inline int kvm_assign_device(struct kvm *kvm,
 475                 struct kvm_assigned_dev_kernel *assigned_dev)
 476 {
 477         return 0;
 478 }
 479
 480 static inline int kvm_deassign_device(struct kvm *kvm,
 481                 struct kvm_assigned_dev_kernel *assigned_dev)
 482 {
 483         return 0;
 484 }
 485 #endif /* CONFIG_IOMMU_API */
 486
 487 static inline void kvm_guest_enter(void)
 488 {
 489         account_system_vtime(current);
 490         current->flags |= PF_VCPU;
 491 }
 492
 493 static inline void kvm_guest_exit(void)
 494 {
 495         account_system_vtime(current);
 496         current->flags &= ~PF_VCPU;
 497 }
 498
 499 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 500 {
 501         return (gpa_t)gfn << PAGE_SHIFT;
 502 }
 503
 504 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 505 {
 506         return (hpa_t)pfn << PAGE_SHIFT;
 507 }
 508
 509 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 510 {
 511         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 512 }
 513
 514 enum kvm_stat_kind {
 515         KVM_STAT_VM,
 516         KVM_STAT_VCPU,
 517 };
 518
 519 struct kvm_stats_debugfs_item {
 520         const char *name;
 521         int offset;
 522         enum kvm_stat_kind kind;
 523         struct dentry *dentry;
 524 };
 525 extern struct kvm_stats_debugfs_item debugfs_entries[];
 526 extern struct dentry *kvm_debugfs_dir;
 527
 528 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 529 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 530 {
 531         if (unlikely(vcpu->kvm->mmu_notifier_count))
 532                 return 1;
 533         /*
 534          * Both reads happen under the mmu_lock and both values are
 535          * modified under mmu_lock, so there's no need of smb_rmb()
 536          * here in between, otherwise mmu_notifier_count should be
 537          * read before mmu_notifier_seq, see
 538          * mmu_notifier_invalidate_range_end write side.
 539          */
 540         if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 541                 return 1;
 542         return 0;
 543 }
 544 #endif
 545
 546 #ifndef KVM_ARCH_HAS_UNALIAS_INSTANTIATION
 547 #define unalias_gfn_instantiation unalias_gfn
 548 #endif
 549
 550 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 551
 552 #define KVM_MAX_IRQ_ROUTES 1024
 553
 554 int kvm_setup_default_irq_routing(struct kvm *kvm);
 555 int kvm_set_irq_routing(struct kvm *kvm,
 556                         const struct kvm_irq_routing_entry *entries,
 557                         unsigned nr,
 558                         unsigned flags);
 559 void kvm_free_irq_routing(struct kvm *kvm);
 560
 561 #else
 562
 563 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 564
 565 #endif
 566
 567 #ifdef CONFIG_HAVE_KVM_EVENTFD
 568
 569 void kvm_eventfd_init(struct kvm *kvm);
 570 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
 571 void kvm_irqfd_release(struct kvm *kvm);
 572 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 573
 574 #else
 575
 576 static inline void kvm_eventfd_init(struct kvm *kvm) {}
 577 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
 578 {
 579         return -EINVAL;
 580 }
 581
 582 static inline void kvm_irqfd_release(struct kvm *kvm) {}
 583 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
 584 {
 585         return -ENOSYS;
 586 }
 587
 588 #endif /* CONFIG_HAVE_KVM_EVENTFD */
 589
 590 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 591 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
 592 {
 593         return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
 594 }
 595 #endif
 596
 597 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
 598
 599 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 600                                   unsigned long arg);
 601
 602 #else
 603
 604 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 605                                                 unsigned long arg)
 606 {
 607         return -ENOTTY;
 608 }
 609
 610 #endif
 611
 612 #endif
 613