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 200 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 /* 109 * Some of the bitops functions do not support too long bitmaps. 110 * This number must be determined not to exceed such limits. 111 */ 112 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1) 113 114 struct kvm_memory_slot { 115 gfn_t base_gfn; 116 unsigned long npages; 117 unsigned long flags; 118 unsigned long *rmap; 119 unsigned long *dirty_bitmap; 120 struct { 121 unsigned long rmap_pde; 122 int write_count; 123 } *lpage_info[KVM_NR_PAGE_SIZES - 1]; 124 unsigned long userspace_addr; 125 int user_alloc; 126 }; 127 128 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot) 129 { 130 return ALIGN(memslot->npages, BITS_PER_LONG) / 8; 131 } 132 133 struct kvm_kernel_irq_routing_entry { 134 u32 gsi; 135 u32 type; 136 int (*set)(struct kvm_kernel_irq_routing_entry *e, 137 struct kvm *kvm, int irq_source_id, int level); 138 union { 139 struct { 140 unsigned irqchip; 141 unsigned pin; 142 } irqchip; 143 struct msi_msg msi; 144 }; 145 struct hlist_node link; 146 }; 147 148 #ifdef __KVM_HAVE_IOAPIC 149 150 struct kvm_irq_routing_table { 151 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS]; 152 struct kvm_kernel_irq_routing_entry *rt_entries; 153 u32 nr_rt_entries; 154 /* 155 * Array indexed by gsi. Each entry contains list of irq chips 156 * the gsi is connected to. 157 */ 158 struct hlist_head map[0]; 159 }; 160 161 #else 162 163 struct kvm_irq_routing_table {}; 164 165 #endif 166 167 struct kvm_memslots { 168 int nmemslots; 169 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS + 170 KVM_PRIVATE_MEM_SLOTS]; 171 }; 172 173 struct kvm { 174 spinlock_t mmu_lock; 175 raw_spinlock_t requests_lock; 176 struct mutex slots_lock; 177 struct mm_struct *mm; /* userspace tied to this vm */ 178 struct kvm_memslots *memslots; 179 struct srcu_struct srcu; 180 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 181 u32 bsp_vcpu_id; 182 struct kvm_vcpu *bsp_vcpu; 183 #endif 184 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; 185 atomic_t online_vcpus; 186 struct list_head vm_list; 187 struct mutex lock; 188 struct kvm_io_bus *buses[KVM_NR_BUSES]; 189 #ifdef CONFIG_HAVE_KVM_EVENTFD 190 struct { 191 spinlock_t lock; 192 struct list_head items; 193 } irqfds; 194 struct list_head ioeventfds; 195 #endif 196 struct kvm_vm_stat stat; 197 struct kvm_arch arch; 198 atomic_t users_count; 199 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET 200 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev; 201 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; 202 #endif 203 204 struct mutex irq_lock; 205 #ifdef CONFIG_HAVE_KVM_IRQCHIP 206 struct kvm_irq_routing_table *irq_routing; 207 struct hlist_head mask_notifier_list; 208 struct hlist_head irq_ack_notifier_list; 209 #endif 210 211 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 212 struct mmu_notifier mmu_notifier; 213 unsigned long mmu_notifier_seq; 214 long mmu_notifier_count; 215 #endif 216 }; 217 218 /* The guest did something we don't support. */ 219 #define pr_unimpl(vcpu, fmt, ...) \ 220 do { \ 221 if (printk_ratelimit()) \ 222 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \ 223 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \ 224 } while (0) 225 226 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt) 227 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt) 228 229 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i) 230 { 231 smp_rmb(); 232 return kvm->vcpus[i]; 233 } 234 235 #define kvm_for_each_vcpu(idx, vcpup, kvm) \ 236 for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \ 237 idx < atomic_read(&kvm->online_vcpus) && vcpup; \ 238 vcpup = kvm_get_vcpu(kvm, ++idx)) 239 240 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 241 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 242 243 void vcpu_load(struct kvm_vcpu *vcpu); 244 void vcpu_put(struct kvm_vcpu *vcpu); 245 246 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, 247 struct module *module); 248 void kvm_exit(void); 249 250 void kvm_get_kvm(struct kvm *kvm); 251 void kvm_put_kvm(struct kvm *kvm); 252 253 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm) 254 { 255 return rcu_dereference_check(kvm->memslots, 256 srcu_read_lock_held(&kvm->srcu) 257 || lockdep_is_held(&kvm->slots_lock)); 258 } 259 260 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1) 261 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB) 262 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; } 263 264 extern struct page *bad_page; 265 extern pfn_t bad_pfn; 266 267 int is_error_page(struct page *page); 268 int is_error_pfn(pfn_t pfn); 269 int kvm_is_error_hva(unsigned long addr); 270 int kvm_set_memory_region(struct kvm *kvm, 271 struct kvm_userspace_memory_region *mem, 272 int user_alloc); 273 int __kvm_set_memory_region(struct kvm *kvm, 274 struct kvm_userspace_memory_region *mem, 275 int user_alloc); 276 int kvm_arch_prepare_memory_region(struct kvm *kvm, 277 struct kvm_memory_slot *memslot, 278 struct kvm_memory_slot old, 279 struct kvm_userspace_memory_region *mem, 280 int user_alloc); 281 void kvm_arch_commit_memory_region(struct kvm *kvm, 282 struct kvm_userspace_memory_region *mem, 283 struct kvm_memory_slot old, 284 int user_alloc); 285 void kvm_disable_largepages(void); 286 void kvm_arch_flush_shadow(struct kvm *kvm); 287 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn); 288 gfn_t unalias_gfn_instantiation(struct kvm *kvm, gfn_t gfn); 289 290 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 291 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); 292 void kvm_release_page_clean(struct page *page); 293 void kvm_release_page_dirty(struct page *page); 294 void kvm_set_page_dirty(struct page *page); 295 void kvm_set_page_accessed(struct page *page); 296 297 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); 298 pfn_t gfn_to_pfn_memslot(struct kvm *kvm, 299 struct kvm_memory_slot *slot, gfn_t gfn); 300 int memslot_id(struct kvm *kvm, gfn_t gfn); 301 void kvm_release_pfn_dirty(pfn_t); 302 void kvm_release_pfn_clean(pfn_t pfn); 303 void kvm_set_pfn_dirty(pfn_t pfn); 304 void kvm_set_pfn_accessed(pfn_t pfn); 305 void kvm_get_pfn(pfn_t pfn); 306 307 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 308 int len); 309 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 310 unsigned long len); 311 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 312 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 313 int offset, int len); 314 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 315 unsigned long len); 316 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 317 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 318 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 319 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 320 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn); 321 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 322 323 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 324 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu); 325 void kvm_resched(struct kvm_vcpu *vcpu); 326 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 327 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 328 void kvm_flush_remote_tlbs(struct kvm *kvm); 329 void kvm_reload_remote_mmus(struct kvm *kvm); 330 331 long kvm_arch_dev_ioctl(struct file *filp, 332 unsigned int ioctl, unsigned long arg); 333 long kvm_arch_vcpu_ioctl(struct file *filp, 334 unsigned int ioctl, unsigned long arg); 335 336 int kvm_dev_ioctl_check_extension(long ext); 337 338 int kvm_get_dirty_log(struct kvm *kvm, 339 struct kvm_dirty_log *log, int *is_dirty); 340 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 341 struct kvm_dirty_log *log); 342 343 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, 344 struct 345 kvm_userspace_memory_region *mem, 346 int user_alloc); 347 long kvm_arch_vm_ioctl(struct file *filp, 348 unsigned int ioctl, unsigned long arg); 349 350 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 351 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 352 353 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 354 struct kvm_translation *tr); 355 356 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 357 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 358 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 359 struct kvm_sregs *sregs); 360 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 361 struct kvm_sregs *sregs); 362 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 363 struct kvm_mp_state *mp_state); 364 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 365 struct kvm_mp_state *mp_state); 366 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 367 struct kvm_guest_debug *dbg); 368 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 369 370 int kvm_arch_init(void *opaque); 371 void kvm_arch_exit(void); 372 373 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 374 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 375 376 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); 377 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 378 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 379 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); 380 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); 381 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); 382 383 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu); 384 int kvm_arch_hardware_enable(void *garbage); 385 void kvm_arch_hardware_disable(void *garbage); 386 int kvm_arch_hardware_setup(void); 387 void kvm_arch_hardware_unsetup(void); 388 void kvm_arch_check_processor_compat(void *rtn); 389 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); 390 391 void kvm_free_physmem(struct kvm *kvm); 392 393 struct kvm *kvm_arch_create_vm(void); 394 void kvm_arch_destroy_vm(struct kvm *kvm); 395 void kvm_free_all_assigned_devices(struct kvm *kvm); 396 void kvm_arch_sync_events(struct kvm *kvm); 397 398 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); 399 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 400 401 int kvm_is_mmio_pfn(pfn_t pfn); 402 403 struct kvm_irq_ack_notifier { 404 struct hlist_node link; 405 unsigned gsi; 406 void (*irq_acked)(struct kvm_irq_ack_notifier *kian); 407 }; 408 409 #define KVM_ASSIGNED_MSIX_PENDING 0x1 410 struct kvm_guest_msix_entry { 411 u32 vector; 412 u16 entry; 413 u16 flags; 414 }; 415 416 struct kvm_assigned_dev_kernel { 417 struct kvm_irq_ack_notifier ack_notifier; 418 struct work_struct interrupt_work; 419 struct list_head list; 420 int assigned_dev_id; 421 int host_segnr; 422 int host_busnr; 423 int host_devfn; 424 unsigned int entries_nr; 425 int host_irq; 426 bool host_irq_disabled; 427 struct msix_entry *host_msix_entries; 428 int guest_irq; 429 struct kvm_guest_msix_entry *guest_msix_entries; 430 unsigned long irq_requested_type; 431 int irq_source_id; 432 int flags; 433 struct pci_dev *dev; 434 struct kvm *kvm; 435 spinlock_t assigned_dev_lock; 436 }; 437 438 struct kvm_irq_mask_notifier { 439 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked); 440 int irq; 441 struct hlist_node link; 442 }; 443 444 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, 445 struct kvm_irq_mask_notifier *kimn); 446 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, 447 struct kvm_irq_mask_notifier *kimn); 448 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask); 449 450 #ifdef __KVM_HAVE_IOAPIC 451 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic, 452 union kvm_ioapic_redirect_entry *entry, 453 unsigned long *deliver_bitmask); 454 #endif 455 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level); 456 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin); 457 void kvm_register_irq_ack_notifier(struct kvm *kvm, 458 struct kvm_irq_ack_notifier *kian); 459 void kvm_unregister_irq_ack_notifier(struct kvm *kvm, 460 struct kvm_irq_ack_notifier *kian); 461 int kvm_request_irq_source_id(struct kvm *kvm); 462 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); 463 464 /* For vcpu->arch.iommu_flags */ 465 #define KVM_IOMMU_CACHE_COHERENCY 0x1 466 467 #ifdef CONFIG_IOMMU_API 468 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot); 469 int kvm_iommu_map_guest(struct kvm *kvm); 470 int kvm_iommu_unmap_guest(struct kvm *kvm); 471 int kvm_assign_device(struct kvm *kvm, 472 struct kvm_assigned_dev_kernel *assigned_dev); 473 int kvm_deassign_device(struct kvm *kvm, 474 struct kvm_assigned_dev_kernel *assigned_dev); 475 #else /* CONFIG_IOMMU_API */ 476 static inline int kvm_iommu_map_pages(struct kvm *kvm, 477 gfn_t base_gfn, 478 unsigned long npages) 479 { 480 return 0; 481 } 482 483 static inline int kvm_iommu_map_guest(struct kvm *kvm) 484 { 485 return -ENODEV; 486 } 487 488 static inline int kvm_iommu_unmap_guest(struct kvm *kvm) 489 { 490 return 0; 491 } 492 493 static inline int kvm_assign_device(struct kvm *kvm, 494 struct kvm_assigned_dev_kernel *assigned_dev) 495 { 496 return 0; 497 } 498 499 static inline int kvm_deassign_device(struct kvm *kvm, 500 struct kvm_assigned_dev_kernel *assigned_dev) 501 { 502 return 0; 503 } 504 #endif /* CONFIG_IOMMU_API */ 505 506 static inline void kvm_guest_enter(void) 507 { 508 account_system_vtime(current); 509 current->flags |= PF_VCPU; 510 } 511 512 static inline void kvm_guest_exit(void) 513 { 514 account_system_vtime(current); 515 current->flags &= ~PF_VCPU; 516 } 517 518 static inline gpa_t gfn_to_gpa(gfn_t gfn) 519 { 520 return (gpa_t)gfn << PAGE_SHIFT; 521 } 522 523 static inline hpa_t pfn_to_hpa(pfn_t pfn) 524 { 525 return (hpa_t)pfn << PAGE_SHIFT; 526 } 527 528 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) 529 { 530 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 531 } 532 533 enum kvm_stat_kind { 534 KVM_STAT_VM, 535 KVM_STAT_VCPU, 536 }; 537 538 struct kvm_stats_debugfs_item { 539 const char *name; 540 int offset; 541 enum kvm_stat_kind kind; 542 struct dentry *dentry; 543 }; 544 extern struct kvm_stats_debugfs_item debugfs_entries[]; 545 extern struct dentry *kvm_debugfs_dir; 546 547 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 548 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq) 549 { 550 if (unlikely(vcpu->kvm->mmu_notifier_count)) 551 return 1; 552 /* 553 * Both reads happen under the mmu_lock and both values are 554 * modified under mmu_lock, so there's no need of smb_rmb() 555 * here in between, otherwise mmu_notifier_count should be 556 * read before mmu_notifier_seq, see 557 * mmu_notifier_invalidate_range_end write side. 558 */ 559 if (vcpu->kvm->mmu_notifier_seq != mmu_seq) 560 return 1; 561 return 0; 562 } 563 #endif 564 565 #ifndef KVM_ARCH_HAS_UNALIAS_INSTANTIATION 566 #define unalias_gfn_instantiation unalias_gfn 567 #endif 568 569 #ifdef CONFIG_HAVE_KVM_IRQCHIP 570 571 #define KVM_MAX_IRQ_ROUTES 1024 572 573 int kvm_setup_default_irq_routing(struct kvm *kvm); 574 int kvm_set_irq_routing(struct kvm *kvm, 575 const struct kvm_irq_routing_entry *entries, 576 unsigned nr, 577 unsigned flags); 578 void kvm_free_irq_routing(struct kvm *kvm); 579 580 #else 581 582 static inline void kvm_free_irq_routing(struct kvm *kvm) {} 583 584 #endif 585 586 #ifdef CONFIG_HAVE_KVM_EVENTFD 587 588 void kvm_eventfd_init(struct kvm *kvm); 589 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags); 590 void kvm_irqfd_release(struct kvm *kvm); 591 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args); 592 593 #else 594 595 static inline void kvm_eventfd_init(struct kvm *kvm) {} 596 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags) 597 { 598 return -EINVAL; 599 } 600 601 static inline void kvm_irqfd_release(struct kvm *kvm) {} 602 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) 603 { 604 return -ENOSYS; 605 } 606 607 #endif /* CONFIG_HAVE_KVM_EVENTFD */ 608 609 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 610 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) 611 { 612 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id; 613 } 614 #endif 615 616 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT 617 618 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, 619 unsigned long arg); 620 621 #else 622 623 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, 624 unsigned long arg) 625 { 626 return -ENOTTY; 627 } 628 629 #endif 630 631 #endif 632 633