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 <linux/slab.h> 20 #include <linux/rcupdate.h> 21 #include <asm/signal.h> 22 23 #include <linux/kvm.h> 24 #include <linux/kvm_para.h> 25 26 #include <linux/kvm_types.h> 27 28 #include <asm/kvm_host.h> 29 30 /* 31 * vcpu->requests bit members 32 */ 33 #define KVM_REQ_TLB_FLUSH 0 34 #define KVM_REQ_MIGRATE_TIMER 1 35 #define KVM_REQ_REPORT_TPR_ACCESS 2 36 #define KVM_REQ_MMU_RELOAD 3 37 #define KVM_REQ_TRIPLE_FAULT 4 38 #define KVM_REQ_PENDING_TIMER 5 39 #define KVM_REQ_UNHALT 6 40 #define KVM_REQ_MMU_SYNC 7 41 #define KVM_REQ_CLOCK_UPDATE 8 42 #define KVM_REQ_KICK 9 43 #define KVM_REQ_DEACTIVATE_FPU 10 44 #define KVM_REQ_EVENT 11 45 #define KVM_REQ_APF_HALT 12 46 #define KVM_REQ_NMI 13 47 48 #define KVM_USERSPACE_IRQ_SOURCE_ID 0 49 50 struct kvm; 51 struct kvm_vcpu; 52 extern struct kmem_cache *kvm_vcpu_cache; 53 54 /* 55 * It would be nice to use something smarter than a linear search, TBD... 56 * Thankfully we dont expect many devices to register (famous last words :), 57 * so until then it will suffice. At least its abstracted so we can change 58 * in one place. 59 */ 60 struct kvm_io_bus { 61 int dev_count; 62 #define NR_IOBUS_DEVS 200 63 struct kvm_io_device *devs[NR_IOBUS_DEVS]; 64 }; 65 66 enum kvm_bus { 67 KVM_MMIO_BUS, 68 KVM_PIO_BUS, 69 KVM_NR_BUSES 70 }; 71 72 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, 73 int len, const void *val); 74 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len, 75 void *val); 76 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, 77 struct kvm_io_device *dev); 78 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx, 79 struct kvm_io_device *dev); 80 81 #ifdef CONFIG_KVM_ASYNC_PF 82 struct kvm_async_pf { 83 struct work_struct work; 84 struct list_head link; 85 struct list_head queue; 86 struct kvm_vcpu *vcpu; 87 struct mm_struct *mm; 88 gva_t gva; 89 unsigned long addr; 90 struct kvm_arch_async_pf arch; 91 struct page *page; 92 bool done; 93 }; 94 95 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu); 96 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu); 97 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn, 98 struct kvm_arch_async_pf *arch); 99 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu); 100 #endif 101 102 enum { 103 OUTSIDE_GUEST_MODE, 104 IN_GUEST_MODE, 105 EXITING_GUEST_MODE 106 }; 107 108 struct kvm_vcpu { 109 struct kvm *kvm; 110 #ifdef CONFIG_PREEMPT_NOTIFIERS 111 struct preempt_notifier preempt_notifier; 112 #endif 113 int cpu; 114 int vcpu_id; 115 int srcu_idx; 116 int mode; 117 unsigned long requests; 118 unsigned long guest_debug; 119 120 struct mutex mutex; 121 struct kvm_run *run; 122 123 int fpu_active; 124 int guest_fpu_loaded, guest_xcr0_loaded; 125 wait_queue_head_t wq; 126 struct pid *pid; 127 int sigset_active; 128 sigset_t sigset; 129 struct kvm_vcpu_stat stat; 130 131 #ifdef CONFIG_HAS_IOMEM 132 int mmio_needed; 133 int mmio_read_completed; 134 int mmio_is_write; 135 int mmio_size; 136 unsigned char mmio_data[8]; 137 gpa_t mmio_phys_addr; 138 #endif 139 140 #ifdef CONFIG_KVM_ASYNC_PF 141 struct { 142 u32 queued; 143 struct list_head queue; 144 struct list_head done; 145 spinlock_t lock; 146 } async_pf; 147 #endif 148 149 struct kvm_vcpu_arch arch; 150 }; 151 152 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu) 153 { 154 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE); 155 } 156 157 /* 158 * Some of the bitops functions do not support too long bitmaps. 159 * This number must be determined not to exceed such limits. 160 */ 161 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1) 162 163 struct kvm_lpage_info { 164 unsigned long rmap_pde; 165 int write_count; 166 }; 167 168 struct kvm_memory_slot { 169 gfn_t base_gfn; 170 unsigned long npages; 171 unsigned long flags; 172 unsigned long *rmap; 173 unsigned long *dirty_bitmap; 174 unsigned long *dirty_bitmap_head; 175 struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1]; 176 unsigned long userspace_addr; 177 int user_alloc; 178 int id; 179 }; 180 181 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot) 182 { 183 return ALIGN(memslot->npages, BITS_PER_LONG) / 8; 184 } 185 186 struct kvm_kernel_irq_routing_entry { 187 u32 gsi; 188 u32 type; 189 int (*set)(struct kvm_kernel_irq_routing_entry *e, 190 struct kvm *kvm, int irq_source_id, int level); 191 union { 192 struct { 193 unsigned irqchip; 194 unsigned pin; 195 } irqchip; 196 struct msi_msg msi; 197 }; 198 struct hlist_node link; 199 }; 200 201 #ifdef __KVM_HAVE_IOAPIC 202 203 struct kvm_irq_routing_table { 204 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS]; 205 struct kvm_kernel_irq_routing_entry *rt_entries; 206 u32 nr_rt_entries; 207 /* 208 * Array indexed by gsi. Each entry contains list of irq chips 209 * the gsi is connected to. 210 */ 211 struct hlist_head map[0]; 212 }; 213 214 #else 215 216 struct kvm_irq_routing_table {}; 217 218 #endif 219 220 struct kvm_memslots { 221 int nmemslots; 222 u64 generation; 223 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS + 224 KVM_PRIVATE_MEM_SLOTS]; 225 }; 226 227 struct kvm { 228 spinlock_t mmu_lock; 229 struct mutex slots_lock; 230 struct mm_struct *mm; /* userspace tied to this vm */ 231 struct kvm_memslots *memslots; 232 struct srcu_struct srcu; 233 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 234 u32 bsp_vcpu_id; 235 struct kvm_vcpu *bsp_vcpu; 236 #endif 237 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; 238 atomic_t online_vcpus; 239 int last_boosted_vcpu; 240 struct list_head vm_list; 241 struct mutex lock; 242 struct kvm_io_bus *buses[KVM_NR_BUSES]; 243 #ifdef CONFIG_HAVE_KVM_EVENTFD 244 struct { 245 spinlock_t lock; 246 struct list_head items; 247 } irqfds; 248 struct list_head ioeventfds; 249 #endif 250 struct kvm_vm_stat stat; 251 struct kvm_arch arch; 252 atomic_t users_count; 253 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET 254 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev; 255 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; 256 #endif 257 258 struct mutex irq_lock; 259 #ifdef CONFIG_HAVE_KVM_IRQCHIP 260 /* 261 * Update side is protected by irq_lock and, 262 * if configured, irqfds.lock. 263 */ 264 struct kvm_irq_routing_table __rcu *irq_routing; 265 struct hlist_head mask_notifier_list; 266 struct hlist_head irq_ack_notifier_list; 267 #endif 268 269 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 270 struct mmu_notifier mmu_notifier; 271 unsigned long mmu_notifier_seq; 272 long mmu_notifier_count; 273 #endif 274 long tlbs_dirty; 275 }; 276 277 /* The guest did something we don't support. */ 278 #define pr_unimpl(vcpu, fmt, ...) \ 279 do { \ 280 if (printk_ratelimit()) \ 281 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \ 282 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \ 283 } while (0) 284 285 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt) 286 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt) 287 288 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i) 289 { 290 smp_rmb(); 291 return kvm->vcpus[i]; 292 } 293 294 #define kvm_for_each_vcpu(idx, vcpup, kvm) \ 295 for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \ 296 idx < atomic_read(&kvm->online_vcpus) && vcpup; \ 297 vcpup = kvm_get_vcpu(kvm, ++idx)) 298 299 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 300 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 301 302 void vcpu_load(struct kvm_vcpu *vcpu); 303 void vcpu_put(struct kvm_vcpu *vcpu); 304 305 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, 306 struct module *module); 307 void kvm_exit(void); 308 309 void kvm_get_kvm(struct kvm *kvm); 310 void kvm_put_kvm(struct kvm *kvm); 311 312 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm) 313 { 314 return rcu_dereference_check(kvm->memslots, 315 srcu_read_lock_held(&kvm->srcu) 316 || lockdep_is_held(&kvm->slots_lock)); 317 } 318 319 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1) 320 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB) 321 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; } 322 323 extern struct page *bad_page; 324 extern pfn_t bad_pfn; 325 326 int is_error_page(struct page *page); 327 int is_error_pfn(pfn_t pfn); 328 int is_hwpoison_pfn(pfn_t pfn); 329 int is_fault_pfn(pfn_t pfn); 330 int kvm_is_error_hva(unsigned long addr); 331 int kvm_set_memory_region(struct kvm *kvm, 332 struct kvm_userspace_memory_region *mem, 333 int user_alloc); 334 int __kvm_set_memory_region(struct kvm *kvm, 335 struct kvm_userspace_memory_region *mem, 336 int user_alloc); 337 int kvm_arch_prepare_memory_region(struct kvm *kvm, 338 struct kvm_memory_slot *memslot, 339 struct kvm_memory_slot old, 340 struct kvm_userspace_memory_region *mem, 341 int user_alloc); 342 void kvm_arch_commit_memory_region(struct kvm *kvm, 343 struct kvm_userspace_memory_region *mem, 344 struct kvm_memory_slot old, 345 int user_alloc); 346 void kvm_disable_largepages(void); 347 void kvm_arch_flush_shadow(struct kvm *kvm); 348 349 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages, 350 int nr_pages); 351 352 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 353 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); 354 void kvm_release_page_clean(struct page *page); 355 void kvm_release_page_dirty(struct page *page); 356 void kvm_set_page_dirty(struct page *page); 357 void kvm_set_page_accessed(struct page *page); 358 359 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr); 360 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn); 361 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async, 362 bool write_fault, bool *writable); 363 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); 364 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault, 365 bool *writable); 366 pfn_t gfn_to_pfn_memslot(struct kvm *kvm, 367 struct kvm_memory_slot *slot, gfn_t gfn); 368 int memslot_id(struct kvm *kvm, gfn_t gfn); 369 void kvm_release_pfn_dirty(pfn_t); 370 void kvm_release_pfn_clean(pfn_t pfn); 371 void kvm_set_pfn_dirty(pfn_t pfn); 372 void kvm_set_pfn_accessed(pfn_t pfn); 373 void kvm_get_pfn(pfn_t pfn); 374 375 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 376 int len); 377 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 378 unsigned long len); 379 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 380 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 381 int offset, int len); 382 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 383 unsigned long len); 384 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 385 void *data, unsigned long len); 386 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 387 gpa_t gpa); 388 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 389 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 390 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 391 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 392 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn); 393 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 394 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot, 395 gfn_t gfn); 396 397 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 398 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu); 399 void kvm_resched(struct kvm_vcpu *vcpu); 400 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 401 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 402 403 void kvm_flush_remote_tlbs(struct kvm *kvm); 404 void kvm_reload_remote_mmus(struct kvm *kvm); 405 406 long kvm_arch_dev_ioctl(struct file *filp, 407 unsigned int ioctl, unsigned long arg); 408 long kvm_arch_vcpu_ioctl(struct file *filp, 409 unsigned int ioctl, unsigned long arg); 410 411 int kvm_dev_ioctl_check_extension(long ext); 412 413 int kvm_get_dirty_log(struct kvm *kvm, 414 struct kvm_dirty_log *log, int *is_dirty); 415 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 416 struct kvm_dirty_log *log); 417 418 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, 419 struct 420 kvm_userspace_memory_region *mem, 421 int user_alloc); 422 long kvm_arch_vm_ioctl(struct file *filp, 423 unsigned int ioctl, unsigned long arg); 424 425 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 426 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 427 428 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 429 struct kvm_translation *tr); 430 431 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 432 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 433 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 434 struct kvm_sregs *sregs); 435 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 436 struct kvm_sregs *sregs); 437 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 438 struct kvm_mp_state *mp_state); 439 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 440 struct kvm_mp_state *mp_state); 441 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 442 struct kvm_guest_debug *dbg); 443 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 444 445 int kvm_arch_init(void *opaque); 446 void kvm_arch_exit(void); 447 448 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 449 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 450 451 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); 452 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 453 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 454 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); 455 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); 456 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); 457 458 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu); 459 int kvm_arch_hardware_enable(void *garbage); 460 void kvm_arch_hardware_disable(void *garbage); 461 int kvm_arch_hardware_setup(void); 462 void kvm_arch_hardware_unsetup(void); 463 void kvm_arch_check_processor_compat(void *rtn); 464 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); 465 466 void kvm_free_physmem(struct kvm *kvm); 467 468 #ifndef __KVM_HAVE_ARCH_VM_ALLOC 469 static inline struct kvm *kvm_arch_alloc_vm(void) 470 { 471 return kzalloc(sizeof(struct kvm), GFP_KERNEL); 472 } 473 474 static inline void kvm_arch_free_vm(struct kvm *kvm) 475 { 476 kfree(kvm); 477 } 478 #endif 479 480 int kvm_arch_init_vm(struct kvm *kvm); 481 void kvm_arch_destroy_vm(struct kvm *kvm); 482 void kvm_free_all_assigned_devices(struct kvm *kvm); 483 void kvm_arch_sync_events(struct kvm *kvm); 484 485 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); 486 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 487 488 int kvm_is_mmio_pfn(pfn_t pfn); 489 490 struct kvm_irq_ack_notifier { 491 struct hlist_node link; 492 unsigned gsi; 493 void (*irq_acked)(struct kvm_irq_ack_notifier *kian); 494 }; 495 496 struct kvm_assigned_dev_kernel { 497 struct kvm_irq_ack_notifier ack_notifier; 498 struct list_head list; 499 int assigned_dev_id; 500 int host_segnr; 501 int host_busnr; 502 int host_devfn; 503 unsigned int entries_nr; 504 int host_irq; 505 bool host_irq_disabled; 506 struct msix_entry *host_msix_entries; 507 int guest_irq; 508 struct msix_entry *guest_msix_entries; 509 unsigned long irq_requested_type; 510 int irq_source_id; 511 int flags; 512 struct pci_dev *dev; 513 struct kvm *kvm; 514 spinlock_t intx_lock; 515 char irq_name[32]; 516 }; 517 518 struct kvm_irq_mask_notifier { 519 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked); 520 int irq; 521 struct hlist_node link; 522 }; 523 524 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, 525 struct kvm_irq_mask_notifier *kimn); 526 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, 527 struct kvm_irq_mask_notifier *kimn); 528 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin, 529 bool mask); 530 531 #ifdef __KVM_HAVE_IOAPIC 532 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic, 533 union kvm_ioapic_redirect_entry *entry, 534 unsigned long *deliver_bitmask); 535 #endif 536 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level); 537 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm, 538 int irq_source_id, int level); 539 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin); 540 void kvm_register_irq_ack_notifier(struct kvm *kvm, 541 struct kvm_irq_ack_notifier *kian); 542 void kvm_unregister_irq_ack_notifier(struct kvm *kvm, 543 struct kvm_irq_ack_notifier *kian); 544 int kvm_request_irq_source_id(struct kvm *kvm); 545 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); 546 547 /* For vcpu->arch.iommu_flags */ 548 #define KVM_IOMMU_CACHE_COHERENCY 0x1 549 550 #ifdef CONFIG_IOMMU_API 551 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot); 552 int kvm_iommu_map_guest(struct kvm *kvm); 553 int kvm_iommu_unmap_guest(struct kvm *kvm); 554 int kvm_assign_device(struct kvm *kvm, 555 struct kvm_assigned_dev_kernel *assigned_dev); 556 int kvm_deassign_device(struct kvm *kvm, 557 struct kvm_assigned_dev_kernel *assigned_dev); 558 #else /* CONFIG_IOMMU_API */ 559 static inline int kvm_iommu_map_pages(struct kvm *kvm, 560 struct kvm_memory_slot *slot) 561 { 562 return 0; 563 } 564 565 static inline int kvm_iommu_map_guest(struct kvm *kvm) 566 { 567 return -ENODEV; 568 } 569 570 static inline int kvm_iommu_unmap_guest(struct kvm *kvm) 571 { 572 return 0; 573 } 574 575 static inline int kvm_assign_device(struct kvm *kvm, 576 struct kvm_assigned_dev_kernel *assigned_dev) 577 { 578 return 0; 579 } 580 581 static inline int kvm_deassign_device(struct kvm *kvm, 582 struct kvm_assigned_dev_kernel *assigned_dev) 583 { 584 return 0; 585 } 586 #endif /* CONFIG_IOMMU_API */ 587 588 static inline void kvm_guest_enter(void) 589 { 590 account_system_vtime(current); 591 current->flags |= PF_VCPU; 592 } 593 594 static inline void kvm_guest_exit(void) 595 { 596 account_system_vtime(current); 597 current->flags &= ~PF_VCPU; 598 } 599 600 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, 601 gfn_t gfn) 602 { 603 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE; 604 } 605 606 static inline gpa_t gfn_to_gpa(gfn_t gfn) 607 { 608 return (gpa_t)gfn << PAGE_SHIFT; 609 } 610 611 static inline gfn_t gpa_to_gfn(gpa_t gpa) 612 { 613 return (gfn_t)(gpa >> PAGE_SHIFT); 614 } 615 616 static inline hpa_t pfn_to_hpa(pfn_t pfn) 617 { 618 return (hpa_t)pfn << PAGE_SHIFT; 619 } 620 621 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) 622 { 623 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 624 } 625 626 enum kvm_stat_kind { 627 KVM_STAT_VM, 628 KVM_STAT_VCPU, 629 }; 630 631 struct kvm_stats_debugfs_item { 632 const char *name; 633 int offset; 634 enum kvm_stat_kind kind; 635 struct dentry *dentry; 636 }; 637 extern struct kvm_stats_debugfs_item debugfs_entries[]; 638 extern struct dentry *kvm_debugfs_dir; 639 640 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 641 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq) 642 { 643 if (unlikely(vcpu->kvm->mmu_notifier_count)) 644 return 1; 645 /* 646 * Both reads happen under the mmu_lock and both values are 647 * modified under mmu_lock, so there's no need of smb_rmb() 648 * here in between, otherwise mmu_notifier_count should be 649 * read before mmu_notifier_seq, see 650 * mmu_notifier_invalidate_range_end write side. 651 */ 652 if (vcpu->kvm->mmu_notifier_seq != mmu_seq) 653 return 1; 654 return 0; 655 } 656 #endif 657 658 #ifdef CONFIG_HAVE_KVM_IRQCHIP 659 660 #define KVM_MAX_IRQ_ROUTES 1024 661 662 int kvm_setup_default_irq_routing(struct kvm *kvm); 663 int kvm_set_irq_routing(struct kvm *kvm, 664 const struct kvm_irq_routing_entry *entries, 665 unsigned nr, 666 unsigned flags); 667 void kvm_free_irq_routing(struct kvm *kvm); 668 669 #else 670 671 static inline void kvm_free_irq_routing(struct kvm *kvm) {} 672 673 #endif 674 675 #ifdef CONFIG_HAVE_KVM_EVENTFD 676 677 void kvm_eventfd_init(struct kvm *kvm); 678 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags); 679 void kvm_irqfd_release(struct kvm *kvm); 680 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *); 681 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args); 682 683 #else 684 685 static inline void kvm_eventfd_init(struct kvm *kvm) {} 686 687 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags) 688 { 689 return -EINVAL; 690 } 691 692 static inline void kvm_irqfd_release(struct kvm *kvm) {} 693 694 #ifdef CONFIG_HAVE_KVM_IRQCHIP 695 static inline void kvm_irq_routing_update(struct kvm *kvm, 696 struct kvm_irq_routing_table *irq_rt) 697 { 698 rcu_assign_pointer(kvm->irq_routing, irq_rt); 699 } 700 #endif 701 702 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) 703 { 704 return -ENOSYS; 705 } 706 707 #endif /* CONFIG_HAVE_KVM_EVENTFD */ 708 709 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 710 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) 711 { 712 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id; 713 } 714 #endif 715 716 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT 717 718 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, 719 unsigned long arg); 720 721 #else 722 723 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, 724 unsigned long arg) 725 { 726 return -ENOTTY; 727 } 728 729 #endif 730 731 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu) 732 { 733 set_bit(req, &vcpu->requests); 734 } 735 736 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu) 737 { 738 if (test_bit(req, &vcpu->requests)) { 739 clear_bit(req, &vcpu->requests); 740 return true; 741 } else { 742 return false; 743 } 744 } 745 746 #endif 747 748