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/bug.h> 17 #include <linux/mm.h> 18 #include <linux/mmu_notifier.h> 19 #include <linux/preempt.h> 20 #include <linux/msi.h> 21 #include <linux/slab.h> 22 #include <linux/rcupdate.h> 23 #include <linux/ratelimit.h> 24 #include <linux/err.h> 25 #include <linux/irqflags.h> 26 #include <linux/context_tracking.h> 27 #include <asm/signal.h> 28 29 #include <linux/kvm.h> 30 #include <linux/kvm_para.h> 31 32 #include <linux/kvm_types.h> 33 34 #include <asm/kvm_host.h> 35 36 #ifndef KVM_MMIO_SIZE 37 #define KVM_MMIO_SIZE 8 38 #endif 39 40 /* 41 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used 42 * in kvm, other bits are visible for userspace which are defined in 43 * include/linux/kvm_h. 44 */ 45 #define KVM_MEMSLOT_INVALID (1UL << 16) 46 47 /* Two fragments for cross MMIO pages. */ 48 #define KVM_MAX_MMIO_FRAGMENTS 2 49 50 /* 51 * For the normal pfn, the highest 12 bits should be zero, 52 * so we can mask bit 62 ~ bit 52 to indicate the error pfn, 53 * mask bit 63 to indicate the noslot pfn. 54 */ 55 #define KVM_PFN_ERR_MASK (0x7ffULL << 52) 56 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52) 57 #define KVM_PFN_NOSLOT (0x1ULL << 63) 58 59 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK) 60 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1) 61 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2) 62 63 /* 64 * error pfns indicate that the gfn is in slot but faild to 65 * translate it to pfn on host. 66 */ 67 static inline bool is_error_pfn(pfn_t pfn) 68 { 69 return !!(pfn & KVM_PFN_ERR_MASK); 70 } 71 72 /* 73 * error_noslot pfns indicate that the gfn can not be 74 * translated to pfn - it is not in slot or failed to 75 * translate it to pfn. 76 */ 77 static inline bool is_error_noslot_pfn(pfn_t pfn) 78 { 79 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK); 80 } 81 82 /* noslot pfn indicates that the gfn is not in slot. */ 83 static inline bool is_noslot_pfn(pfn_t pfn) 84 { 85 return pfn == KVM_PFN_NOSLOT; 86 } 87 88 /* 89 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390) 90 * provide own defines and kvm_is_error_hva 91 */ 92 #ifndef KVM_HVA_ERR_BAD 93 94 #define KVM_HVA_ERR_BAD (PAGE_OFFSET) 95 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE) 96 97 static inline bool kvm_is_error_hva(unsigned long addr) 98 { 99 return addr >= PAGE_OFFSET; 100 } 101 102 #endif 103 104 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT)) 105 106 static inline bool is_error_page(struct page *page) 107 { 108 return IS_ERR(page); 109 } 110 111 /* 112 * vcpu->requests bit members 113 */ 114 #define KVM_REQ_TLB_FLUSH 0 115 #define KVM_REQ_MIGRATE_TIMER 1 116 #define KVM_REQ_REPORT_TPR_ACCESS 2 117 #define KVM_REQ_MMU_RELOAD 3 118 #define KVM_REQ_TRIPLE_FAULT 4 119 #define KVM_REQ_PENDING_TIMER 5 120 #define KVM_REQ_UNHALT 6 121 #define KVM_REQ_MMU_SYNC 7 122 #define KVM_REQ_CLOCK_UPDATE 8 123 #define KVM_REQ_KICK 9 124 #define KVM_REQ_DEACTIVATE_FPU 10 125 #define KVM_REQ_EVENT 11 126 #define KVM_REQ_APF_HALT 12 127 #define KVM_REQ_STEAL_UPDATE 13 128 #define KVM_REQ_NMI 14 129 #define KVM_REQ_PMU 15 130 #define KVM_REQ_PMI 16 131 #define KVM_REQ_WATCHDOG 17 132 #define KVM_REQ_MASTERCLOCK_UPDATE 18 133 #define KVM_REQ_MCLOCK_INPROGRESS 19 134 #define KVM_REQ_EPR_EXIT 20 135 #define KVM_REQ_SCAN_IOAPIC 21 136 #define KVM_REQ_GLOBAL_CLOCK_UPDATE 22 137 138 #define KVM_USERSPACE_IRQ_SOURCE_ID 0 139 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1 140 141 struct kvm; 142 struct kvm_vcpu; 143 extern struct kmem_cache *kvm_vcpu_cache; 144 145 extern raw_spinlock_t kvm_lock; 146 extern struct list_head vm_list; 147 148 struct kvm_io_range { 149 gpa_t addr; 150 int len; 151 struct kvm_io_device *dev; 152 }; 153 154 #define NR_IOBUS_DEVS 1000 155 156 struct kvm_io_bus { 157 int dev_count; 158 int ioeventfd_count; 159 struct kvm_io_range range[]; 160 }; 161 162 enum kvm_bus { 163 KVM_MMIO_BUS, 164 KVM_PIO_BUS, 165 KVM_VIRTIO_CCW_NOTIFY_BUS, 166 KVM_NR_BUSES 167 }; 168 169 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, 170 int len, const void *val); 171 int kvm_io_bus_write_cookie(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, 172 int len, const void *val, long cookie); 173 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len, 174 void *val); 175 int kvm_io_bus_read_cookie(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, 176 int len, void *val, long cookie); 177 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, 178 int len, struct kvm_io_device *dev); 179 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx, 180 struct kvm_io_device *dev); 181 182 #ifdef CONFIG_KVM_ASYNC_PF 183 struct kvm_async_pf { 184 struct work_struct work; 185 struct list_head link; 186 struct list_head queue; 187 struct kvm_vcpu *vcpu; 188 struct mm_struct *mm; 189 gva_t gva; 190 unsigned long addr; 191 struct kvm_arch_async_pf arch; 192 struct page *page; 193 bool done; 194 }; 195 196 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu); 197 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu); 198 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn, 199 struct kvm_arch_async_pf *arch); 200 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu); 201 #endif 202 203 enum { 204 OUTSIDE_GUEST_MODE, 205 IN_GUEST_MODE, 206 EXITING_GUEST_MODE, 207 READING_SHADOW_PAGE_TABLES, 208 }; 209 210 /* 211 * Sometimes a large or cross-page mmio needs to be broken up into separate 212 * exits for userspace servicing. 213 */ 214 struct kvm_mmio_fragment { 215 gpa_t gpa; 216 void *data; 217 unsigned len; 218 }; 219 220 struct kvm_vcpu { 221 struct kvm *kvm; 222 #ifdef CONFIG_PREEMPT_NOTIFIERS 223 struct preempt_notifier preempt_notifier; 224 #endif 225 int cpu; 226 int vcpu_id; 227 int srcu_idx; 228 int mode; 229 unsigned long requests; 230 unsigned long guest_debug; 231 232 struct mutex mutex; 233 struct kvm_run *run; 234 235 int fpu_active; 236 int guest_fpu_loaded, guest_xcr0_loaded; 237 wait_queue_head_t wq; 238 struct pid *pid; 239 int sigset_active; 240 sigset_t sigset; 241 struct kvm_vcpu_stat stat; 242 243 #ifdef CONFIG_HAS_IOMEM 244 int mmio_needed; 245 int mmio_read_completed; 246 int mmio_is_write; 247 int mmio_cur_fragment; 248 int mmio_nr_fragments; 249 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS]; 250 #endif 251 252 #ifdef CONFIG_KVM_ASYNC_PF 253 struct { 254 u32 queued; 255 struct list_head queue; 256 struct list_head done; 257 spinlock_t lock; 258 } async_pf; 259 #endif 260 261 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT 262 /* 263 * Cpu relax intercept or pause loop exit optimization 264 * in_spin_loop: set when a vcpu does a pause loop exit 265 * or cpu relax intercepted. 266 * dy_eligible: indicates whether vcpu is eligible for directed yield. 267 */ 268 struct { 269 bool in_spin_loop; 270 bool dy_eligible; 271 } spin_loop; 272 #endif 273 bool preempted; 274 struct kvm_vcpu_arch arch; 275 }; 276 277 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu) 278 { 279 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE); 280 } 281 282 /* 283 * Some of the bitops functions do not support too long bitmaps. 284 * This number must be determined not to exceed such limits. 285 */ 286 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1) 287 288 struct kvm_memory_slot { 289 gfn_t base_gfn; 290 unsigned long npages; 291 unsigned long *dirty_bitmap; 292 struct kvm_arch_memory_slot arch; 293 unsigned long userspace_addr; 294 u32 flags; 295 short id; 296 }; 297 298 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot) 299 { 300 return ALIGN(memslot->npages, BITS_PER_LONG) / 8; 301 } 302 303 struct kvm_kernel_irq_routing_entry { 304 u32 gsi; 305 u32 type; 306 int (*set)(struct kvm_kernel_irq_routing_entry *e, 307 struct kvm *kvm, int irq_source_id, int level, 308 bool line_status); 309 union { 310 struct { 311 unsigned irqchip; 312 unsigned pin; 313 } irqchip; 314 struct msi_msg msi; 315 }; 316 struct hlist_node link; 317 }; 318 319 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING 320 321 struct kvm_irq_routing_table { 322 int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS]; 323 struct kvm_kernel_irq_routing_entry *rt_entries; 324 u32 nr_rt_entries; 325 /* 326 * Array indexed by gsi. Each entry contains list of irq chips 327 * the gsi is connected to. 328 */ 329 struct hlist_head map[0]; 330 }; 331 332 #else 333 334 struct kvm_irq_routing_table {}; 335 336 #endif 337 338 #ifndef KVM_PRIVATE_MEM_SLOTS 339 #define KVM_PRIVATE_MEM_SLOTS 0 340 #endif 341 342 #ifndef KVM_MEM_SLOTS_NUM 343 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS) 344 #endif 345 346 /* 347 * Note: 348 * memslots are not sorted by id anymore, please use id_to_memslot() 349 * to get the memslot by its id. 350 */ 351 struct kvm_memslots { 352 u64 generation; 353 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM]; 354 /* The mapping table from slot id to the index in memslots[]. */ 355 short id_to_index[KVM_MEM_SLOTS_NUM]; 356 }; 357 358 struct kvm { 359 spinlock_t mmu_lock; 360 struct mutex slots_lock; 361 struct mm_struct *mm; /* userspace tied to this vm */ 362 struct kvm_memslots *memslots; 363 struct srcu_struct srcu; 364 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 365 u32 bsp_vcpu_id; 366 #endif 367 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; 368 atomic_t online_vcpus; 369 int last_boosted_vcpu; 370 struct list_head vm_list; 371 struct mutex lock; 372 struct kvm_io_bus *buses[KVM_NR_BUSES]; 373 #ifdef CONFIG_HAVE_KVM_EVENTFD 374 struct { 375 spinlock_t lock; 376 struct list_head items; 377 struct list_head resampler_list; 378 struct mutex resampler_lock; 379 } irqfds; 380 struct list_head ioeventfds; 381 #endif 382 struct kvm_vm_stat stat; 383 struct kvm_arch arch; 384 atomic_t users_count; 385 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET 386 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; 387 spinlock_t ring_lock; 388 struct list_head coalesced_zones; 389 #endif 390 391 struct mutex irq_lock; 392 #ifdef CONFIG_HAVE_KVM_IRQCHIP 393 /* 394 * Update side is protected by irq_lock and, 395 * if configured, irqfds.lock. 396 */ 397 struct kvm_irq_routing_table __rcu *irq_routing; 398 struct hlist_head mask_notifier_list; 399 struct hlist_head irq_ack_notifier_list; 400 #endif 401 402 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) 403 struct mmu_notifier mmu_notifier; 404 unsigned long mmu_notifier_seq; 405 long mmu_notifier_count; 406 #endif 407 long tlbs_dirty; 408 struct list_head devices; 409 }; 410 411 #define kvm_err(fmt, ...) \ 412 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 413 #define kvm_info(fmt, ...) \ 414 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 415 #define kvm_debug(fmt, ...) \ 416 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 417 #define kvm_pr_unimpl(fmt, ...) \ 418 pr_err_ratelimited("kvm [%i]: " fmt, \ 419 task_tgid_nr(current), ## __VA_ARGS__) 420 421 /* The guest did something we don't support. */ 422 #define vcpu_unimpl(vcpu, fmt, ...) \ 423 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__) 424 425 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i) 426 { 427 smp_rmb(); 428 return kvm->vcpus[i]; 429 } 430 431 #define kvm_for_each_vcpu(idx, vcpup, kvm) \ 432 for (idx = 0; \ 433 idx < atomic_read(&kvm->online_vcpus) && \ 434 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \ 435 idx++) 436 437 #define kvm_for_each_memslot(memslot, slots) \ 438 for (memslot = &slots->memslots[0]; \ 439 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\ 440 memslot++) 441 442 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 443 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 444 445 int __must_check vcpu_load(struct kvm_vcpu *vcpu); 446 void vcpu_put(struct kvm_vcpu *vcpu); 447 448 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING 449 int kvm_irqfd_init(void); 450 void kvm_irqfd_exit(void); 451 #else 452 static inline int kvm_irqfd_init(void) 453 { 454 return 0; 455 } 456 457 static inline void kvm_irqfd_exit(void) 458 { 459 } 460 #endif 461 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, 462 struct module *module); 463 void kvm_exit(void); 464 465 void kvm_get_kvm(struct kvm *kvm); 466 void kvm_put_kvm(struct kvm *kvm); 467 void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new, 468 u64 last_generation); 469 470 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm) 471 { 472 return rcu_dereference_check(kvm->memslots, 473 srcu_read_lock_held(&kvm->srcu) 474 || lockdep_is_held(&kvm->slots_lock)); 475 } 476 477 static inline struct kvm_memory_slot * 478 id_to_memslot(struct kvm_memslots *slots, int id) 479 { 480 int index = slots->id_to_index[id]; 481 struct kvm_memory_slot *slot; 482 483 slot = &slots->memslots[index]; 484 485 WARN_ON(slot->id != id); 486 return slot; 487 } 488 489 /* 490 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations: 491 * - create a new memory slot 492 * - delete an existing memory slot 493 * - modify an existing memory slot 494 * -- move it in the guest physical memory space 495 * -- just change its flags 496 * 497 * Since flags can be changed by some of these operations, the following 498 * differentiation is the best we can do for __kvm_set_memory_region(): 499 */ 500 enum kvm_mr_change { 501 KVM_MR_CREATE, 502 KVM_MR_DELETE, 503 KVM_MR_MOVE, 504 KVM_MR_FLAGS_ONLY, 505 }; 506 507 int kvm_set_memory_region(struct kvm *kvm, 508 struct kvm_userspace_memory_region *mem); 509 int __kvm_set_memory_region(struct kvm *kvm, 510 struct kvm_userspace_memory_region *mem); 511 void kvm_arch_free_memslot(struct kvm_memory_slot *free, 512 struct kvm_memory_slot *dont); 513 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages); 514 void kvm_arch_memslots_updated(struct kvm *kvm); 515 int kvm_arch_prepare_memory_region(struct kvm *kvm, 516 struct kvm_memory_slot *memslot, 517 struct kvm_userspace_memory_region *mem, 518 enum kvm_mr_change change); 519 void kvm_arch_commit_memory_region(struct kvm *kvm, 520 struct kvm_userspace_memory_region *mem, 521 const struct kvm_memory_slot *old, 522 enum kvm_mr_change change); 523 bool kvm_largepages_enabled(void); 524 void kvm_disable_largepages(void); 525 /* flush all memory translations */ 526 void kvm_arch_flush_shadow_all(struct kvm *kvm); 527 /* flush memory translations pointing to 'slot' */ 528 void kvm_arch_flush_shadow_memslot(struct kvm *kvm, 529 struct kvm_memory_slot *slot); 530 531 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages, 532 int nr_pages); 533 534 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 535 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); 536 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn); 537 void kvm_release_page_clean(struct page *page); 538 void kvm_release_page_dirty(struct page *page); 539 void kvm_set_page_dirty(struct page *page); 540 void kvm_set_page_accessed(struct page *page); 541 542 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn); 543 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async, 544 bool write_fault, bool *writable); 545 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); 546 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault, 547 bool *writable); 548 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn); 549 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn); 550 551 void kvm_release_pfn_dirty(pfn_t pfn); 552 void kvm_release_pfn_clean(pfn_t pfn); 553 void kvm_set_pfn_dirty(pfn_t pfn); 554 void kvm_set_pfn_accessed(pfn_t pfn); 555 void kvm_get_pfn(pfn_t pfn); 556 557 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 558 int len); 559 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 560 unsigned long len); 561 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 562 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 563 void *data, unsigned long len); 564 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 565 int offset, int len); 566 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 567 unsigned long len); 568 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 569 void *data, unsigned long len); 570 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 571 gpa_t gpa, unsigned long len); 572 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 573 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 574 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 575 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 576 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn); 577 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 578 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot, 579 gfn_t gfn); 580 581 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 582 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 583 bool kvm_vcpu_yield_to(struct kvm_vcpu *target); 584 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu); 585 void kvm_resched(struct kvm_vcpu *vcpu); 586 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 587 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 588 589 void kvm_flush_remote_tlbs(struct kvm *kvm); 590 void kvm_reload_remote_mmus(struct kvm *kvm); 591 void kvm_make_mclock_inprogress_request(struct kvm *kvm); 592 void kvm_make_scan_ioapic_request(struct kvm *kvm); 593 594 long kvm_arch_dev_ioctl(struct file *filp, 595 unsigned int ioctl, unsigned long arg); 596 long kvm_arch_vcpu_ioctl(struct file *filp, 597 unsigned int ioctl, unsigned long arg); 598 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf); 599 600 int kvm_dev_ioctl_check_extension(long ext); 601 602 int kvm_get_dirty_log(struct kvm *kvm, 603 struct kvm_dirty_log *log, int *is_dirty); 604 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 605 struct kvm_dirty_log *log); 606 607 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, 608 struct kvm_userspace_memory_region *mem); 609 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, 610 bool line_status); 611 long kvm_arch_vm_ioctl(struct file *filp, 612 unsigned int ioctl, unsigned long arg); 613 614 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 615 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 616 617 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 618 struct kvm_translation *tr); 619 620 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 621 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 622 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 623 struct kvm_sregs *sregs); 624 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 625 struct kvm_sregs *sregs); 626 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 627 struct kvm_mp_state *mp_state); 628 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 629 struct kvm_mp_state *mp_state); 630 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 631 struct kvm_guest_debug *dbg); 632 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 633 634 int kvm_arch_init(void *opaque); 635 void kvm_arch_exit(void); 636 637 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 638 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 639 640 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); 641 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 642 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 643 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); 644 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); 645 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu); 646 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); 647 648 int kvm_arch_hardware_enable(void *garbage); 649 void kvm_arch_hardware_disable(void *garbage); 650 int kvm_arch_hardware_setup(void); 651 void kvm_arch_hardware_unsetup(void); 652 void kvm_arch_check_processor_compat(void *rtn); 653 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); 654 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu); 655 656 void kvm_free_physmem(struct kvm *kvm); 657 658 void *kvm_kvzalloc(unsigned long size); 659 void kvm_kvfree(const void *addr); 660 661 #ifndef __KVM_HAVE_ARCH_VM_ALLOC 662 static inline struct kvm *kvm_arch_alloc_vm(void) 663 { 664 return kzalloc(sizeof(struct kvm), GFP_KERNEL); 665 } 666 667 static inline void kvm_arch_free_vm(struct kvm *kvm) 668 { 669 kfree(kvm); 670 } 671 #endif 672 673 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu) 674 { 675 #ifdef __KVM_HAVE_ARCH_WQP 676 return vcpu->arch.wqp; 677 #else 678 return &vcpu->wq; 679 #endif 680 } 681 682 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type); 683 void kvm_arch_destroy_vm(struct kvm *kvm); 684 void kvm_arch_sync_events(struct kvm *kvm); 685 686 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); 687 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 688 689 bool kvm_is_mmio_pfn(pfn_t pfn); 690 691 struct kvm_irq_ack_notifier { 692 struct hlist_node link; 693 unsigned gsi; 694 void (*irq_acked)(struct kvm_irq_ack_notifier *kian); 695 }; 696 697 struct kvm_assigned_dev_kernel { 698 struct kvm_irq_ack_notifier ack_notifier; 699 struct list_head list; 700 int assigned_dev_id; 701 int host_segnr; 702 int host_busnr; 703 int host_devfn; 704 unsigned int entries_nr; 705 int host_irq; 706 bool host_irq_disabled; 707 bool pci_2_3; 708 struct msix_entry *host_msix_entries; 709 int guest_irq; 710 struct msix_entry *guest_msix_entries; 711 unsigned long irq_requested_type; 712 int irq_source_id; 713 int flags; 714 struct pci_dev *dev; 715 struct kvm *kvm; 716 spinlock_t intx_lock; 717 spinlock_t intx_mask_lock; 718 char irq_name[32]; 719 struct pci_saved_state *pci_saved_state; 720 }; 721 722 struct kvm_irq_mask_notifier { 723 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked); 724 int irq; 725 struct hlist_node link; 726 }; 727 728 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, 729 struct kvm_irq_mask_notifier *kimn); 730 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, 731 struct kvm_irq_mask_notifier *kimn); 732 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin, 733 bool mask); 734 735 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level, 736 bool line_status); 737 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level); 738 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm, 739 int irq_source_id, int level, bool line_status); 740 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin); 741 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin); 742 void kvm_register_irq_ack_notifier(struct kvm *kvm, 743 struct kvm_irq_ack_notifier *kian); 744 void kvm_unregister_irq_ack_notifier(struct kvm *kvm, 745 struct kvm_irq_ack_notifier *kian); 746 int kvm_request_irq_source_id(struct kvm *kvm); 747 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); 748 749 /* For vcpu->arch.iommu_flags */ 750 #define KVM_IOMMU_CACHE_COHERENCY 0x1 751 752 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT 753 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot); 754 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot); 755 int kvm_iommu_map_guest(struct kvm *kvm); 756 int kvm_iommu_unmap_guest(struct kvm *kvm); 757 int kvm_assign_device(struct kvm *kvm, 758 struct kvm_assigned_dev_kernel *assigned_dev); 759 int kvm_deassign_device(struct kvm *kvm, 760 struct kvm_assigned_dev_kernel *assigned_dev); 761 #else 762 static inline int kvm_iommu_map_pages(struct kvm *kvm, 763 struct kvm_memory_slot *slot) 764 { 765 return 0; 766 } 767 768 static inline void kvm_iommu_unmap_pages(struct kvm *kvm, 769 struct kvm_memory_slot *slot) 770 { 771 } 772 773 static inline int kvm_iommu_unmap_guest(struct kvm *kvm) 774 { 775 return 0; 776 } 777 #endif 778 779 static inline void kvm_guest_enter(void) 780 { 781 unsigned long flags; 782 783 BUG_ON(preemptible()); 784 785 local_irq_save(flags); 786 guest_enter(); 787 local_irq_restore(flags); 788 789 /* KVM does not hold any references to rcu protected data when it 790 * switches CPU into a guest mode. In fact switching to a guest mode 791 * is very similar to exiting to userspase from rcu point of view. In 792 * addition CPU may stay in a guest mode for quite a long time (up to 793 * one time slice). Lets treat guest mode as quiescent state, just like 794 * we do with user-mode execution. 795 */ 796 rcu_virt_note_context_switch(smp_processor_id()); 797 } 798 799 static inline void kvm_guest_exit(void) 800 { 801 unsigned long flags; 802 803 local_irq_save(flags); 804 guest_exit(); 805 local_irq_restore(flags); 806 } 807 808 /* 809 * search_memslots() and __gfn_to_memslot() are here because they are 810 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c. 811 * gfn_to_memslot() itself isn't here as an inline because that would 812 * bloat other code too much. 813 */ 814 static inline struct kvm_memory_slot * 815 search_memslots(struct kvm_memslots *slots, gfn_t gfn) 816 { 817 struct kvm_memory_slot *memslot; 818 819 kvm_for_each_memslot(memslot, slots) 820 if (gfn >= memslot->base_gfn && 821 gfn < memslot->base_gfn + memslot->npages) 822 return memslot; 823 824 return NULL; 825 } 826 827 static inline struct kvm_memory_slot * 828 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn) 829 { 830 return search_memslots(slots, gfn); 831 } 832 833 static inline unsigned long 834 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn) 835 { 836 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE; 837 } 838 839 static inline int memslot_id(struct kvm *kvm, gfn_t gfn) 840 { 841 return gfn_to_memslot(kvm, gfn)->id; 842 } 843 844 static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level) 845 { 846 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */ 847 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) - 848 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level)); 849 } 850 851 static inline gfn_t 852 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot) 853 { 854 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT; 855 856 return slot->base_gfn + gfn_offset; 857 } 858 859 static inline gpa_t gfn_to_gpa(gfn_t gfn) 860 { 861 return (gpa_t)gfn << PAGE_SHIFT; 862 } 863 864 static inline gfn_t gpa_to_gfn(gpa_t gpa) 865 { 866 return (gfn_t)(gpa >> PAGE_SHIFT); 867 } 868 869 static inline hpa_t pfn_to_hpa(pfn_t pfn) 870 { 871 return (hpa_t)pfn << PAGE_SHIFT; 872 } 873 874 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) 875 { 876 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 877 } 878 879 enum kvm_stat_kind { 880 KVM_STAT_VM, 881 KVM_STAT_VCPU, 882 }; 883 884 struct kvm_stats_debugfs_item { 885 const char *name; 886 int offset; 887 enum kvm_stat_kind kind; 888 struct dentry *dentry; 889 }; 890 extern struct kvm_stats_debugfs_item debugfs_entries[]; 891 extern struct dentry *kvm_debugfs_dir; 892 893 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) 894 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq) 895 { 896 if (unlikely(kvm->mmu_notifier_count)) 897 return 1; 898 /* 899 * Ensure the read of mmu_notifier_count happens before the read 900 * of mmu_notifier_seq. This interacts with the smp_wmb() in 901 * mmu_notifier_invalidate_range_end to make sure that the caller 902 * either sees the old (non-zero) value of mmu_notifier_count or 903 * the new (incremented) value of mmu_notifier_seq. 904 * PowerPC Book3s HV KVM calls this under a per-page lock 905 * rather than under kvm->mmu_lock, for scalability, so 906 * can't rely on kvm->mmu_lock to keep things ordered. 907 */ 908 smp_rmb(); 909 if (kvm->mmu_notifier_seq != mmu_seq) 910 return 1; 911 return 0; 912 } 913 #endif 914 915 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING 916 917 #define KVM_MAX_IRQ_ROUTES 1024 918 919 int kvm_setup_default_irq_routing(struct kvm *kvm); 920 int kvm_set_irq_routing(struct kvm *kvm, 921 const struct kvm_irq_routing_entry *entries, 922 unsigned nr, 923 unsigned flags); 924 int kvm_set_routing_entry(struct kvm_irq_routing_table *rt, 925 struct kvm_kernel_irq_routing_entry *e, 926 const struct kvm_irq_routing_entry *ue); 927 void kvm_free_irq_routing(struct kvm *kvm); 928 929 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi); 930 931 #else 932 933 static inline void kvm_free_irq_routing(struct kvm *kvm) {} 934 935 #endif 936 937 #ifdef CONFIG_HAVE_KVM_EVENTFD 938 939 void kvm_eventfd_init(struct kvm *kvm); 940 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args); 941 942 #ifdef CONFIG_HAVE_KVM_IRQCHIP 943 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args); 944 void kvm_irqfd_release(struct kvm *kvm); 945 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *); 946 #else 947 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args) 948 { 949 return -EINVAL; 950 } 951 952 static inline void kvm_irqfd_release(struct kvm *kvm) {} 953 #endif 954 955 #else 956 957 static inline void kvm_eventfd_init(struct kvm *kvm) {} 958 959 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args) 960 { 961 return -EINVAL; 962 } 963 964 static inline void kvm_irqfd_release(struct kvm *kvm) {} 965 966 #ifdef CONFIG_HAVE_KVM_IRQCHIP 967 static inline void kvm_irq_routing_update(struct kvm *kvm, 968 struct kvm_irq_routing_table *irq_rt) 969 { 970 rcu_assign_pointer(kvm->irq_routing, irq_rt); 971 } 972 #endif 973 974 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) 975 { 976 return -ENOSYS; 977 } 978 979 #endif /* CONFIG_HAVE_KVM_EVENTFD */ 980 981 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 982 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) 983 { 984 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id; 985 } 986 987 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu); 988 989 #else 990 991 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; } 992 993 #endif 994 995 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT 996 997 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, 998 unsigned long arg); 999 1000 void kvm_free_all_assigned_devices(struct kvm *kvm); 1001 1002 #else 1003 1004 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, 1005 unsigned long arg) 1006 { 1007 return -ENOTTY; 1008 } 1009 1010 static inline void kvm_free_all_assigned_devices(struct kvm *kvm) {} 1011 1012 #endif 1013 1014 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu) 1015 { 1016 set_bit(req, &vcpu->requests); 1017 } 1018 1019 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu) 1020 { 1021 if (test_bit(req, &vcpu->requests)) { 1022 clear_bit(req, &vcpu->requests); 1023 return true; 1024 } else { 1025 return false; 1026 } 1027 } 1028 1029 extern bool kvm_rebooting; 1030 1031 struct kvm_device_ops; 1032 1033 struct kvm_device { 1034 struct kvm_device_ops *ops; 1035 struct kvm *kvm; 1036 void *private; 1037 struct list_head vm_node; 1038 }; 1039 1040 /* create, destroy, and name are mandatory */ 1041 struct kvm_device_ops { 1042 const char *name; 1043 int (*create)(struct kvm_device *dev, u32 type); 1044 1045 /* 1046 * Destroy is responsible for freeing dev. 1047 * 1048 * Destroy may be called before or after destructors are called 1049 * on emulated I/O regions, depending on whether a reference is 1050 * held by a vcpu or other kvm component that gets destroyed 1051 * after the emulated I/O. 1052 */ 1053 void (*destroy)(struct kvm_device *dev); 1054 1055 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); 1056 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); 1057 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); 1058 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl, 1059 unsigned long arg); 1060 }; 1061 1062 void kvm_device_get(struct kvm_device *dev); 1063 void kvm_device_put(struct kvm_device *dev); 1064 struct kvm_device *kvm_device_from_filp(struct file *filp); 1065 1066 extern struct kvm_device_ops kvm_mpic_ops; 1067 extern struct kvm_device_ops kvm_xics_ops; 1068 1069 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT 1070 1071 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val) 1072 { 1073 vcpu->spin_loop.in_spin_loop = val; 1074 } 1075 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val) 1076 { 1077 vcpu->spin_loop.dy_eligible = val; 1078 } 1079 1080 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */ 1081 1082 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val) 1083 { 1084 } 1085 1086 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val) 1087 { 1088 } 1089 1090 static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu) 1091 { 1092 return true; 1093 } 1094 1095 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */ 1096 #endif 1097 1098