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 /* 37 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used 38 * in kvm, other bits are visible for userspace which are defined in 39 * include/linux/kvm_h. 40 */ 41 #define KVM_MEMSLOT_INVALID (1UL << 16) 42 #define KVM_MEMSLOT_INCOHERENT (1UL << 17) 43 44 /* Two fragments for cross MMIO pages. */ 45 #define KVM_MAX_MMIO_FRAGMENTS 2 46 47 #ifndef KVM_ADDRESS_SPACE_NUM 48 #define KVM_ADDRESS_SPACE_NUM 1 49 #endif 50 51 /* 52 * For the normal pfn, the highest 12 bits should be zero, 53 * so we can mask bit 62 ~ bit 52 to indicate the error pfn, 54 * mask bit 63 to indicate the noslot pfn. 55 */ 56 #define KVM_PFN_ERR_MASK (0x7ffULL << 52) 57 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52) 58 #define KVM_PFN_NOSLOT (0x1ULL << 63) 59 60 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK) 61 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1) 62 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2) 63 64 /* 65 * error pfns indicate that the gfn is in slot but faild to 66 * translate it to pfn on host. 67 */ 68 static inline bool is_error_pfn(pfn_t pfn) 69 { 70 return !!(pfn & KVM_PFN_ERR_MASK); 71 } 72 73 /* 74 * error_noslot pfns indicate that the gfn can not be 75 * translated to pfn - it is not in slot or failed to 76 * translate it to pfn. 77 */ 78 static inline bool is_error_noslot_pfn(pfn_t pfn) 79 { 80 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK); 81 } 82 83 /* noslot pfn indicates that the gfn is not in slot. */ 84 static inline bool is_noslot_pfn(pfn_t pfn) 85 { 86 return pfn == KVM_PFN_NOSLOT; 87 } 88 89 /* 90 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390) 91 * provide own defines and kvm_is_error_hva 92 */ 93 #ifndef KVM_HVA_ERR_BAD 94 95 #define KVM_HVA_ERR_BAD (PAGE_OFFSET) 96 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE) 97 98 static inline bool kvm_is_error_hva(unsigned long addr) 99 { 100 return addr >= PAGE_OFFSET; 101 } 102 103 #endif 104 105 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT)) 106 107 static inline bool is_error_page(struct page *page) 108 { 109 return IS_ERR(page); 110 } 111 112 /* 113 * vcpu->requests bit members 114 */ 115 #define KVM_REQ_TLB_FLUSH 0 116 #define KVM_REQ_MIGRATE_TIMER 1 117 #define KVM_REQ_REPORT_TPR_ACCESS 2 118 #define KVM_REQ_MMU_RELOAD 3 119 #define KVM_REQ_TRIPLE_FAULT 4 120 #define KVM_REQ_PENDING_TIMER 5 121 #define KVM_REQ_UNHALT 6 122 #define KVM_REQ_MMU_SYNC 7 123 #define KVM_REQ_CLOCK_UPDATE 8 124 #define KVM_REQ_KICK 9 125 #define KVM_REQ_DEACTIVATE_FPU 10 126 #define KVM_REQ_EVENT 11 127 #define KVM_REQ_APF_HALT 12 128 #define KVM_REQ_STEAL_UPDATE 13 129 #define KVM_REQ_NMI 14 130 #define KVM_REQ_PMU 15 131 #define KVM_REQ_PMI 16 132 #define KVM_REQ_WATCHDOG 17 133 #define KVM_REQ_MASTERCLOCK_UPDATE 18 134 #define KVM_REQ_MCLOCK_INPROGRESS 19 135 #define KVM_REQ_EPR_EXIT 20 136 #define KVM_REQ_SCAN_IOAPIC 21 137 #define KVM_REQ_GLOBAL_CLOCK_UPDATE 22 138 #define KVM_REQ_ENABLE_IBS 23 139 #define KVM_REQ_DISABLE_IBS 24 140 #define KVM_REQ_APIC_PAGE_RELOAD 25 141 #define KVM_REQ_SMI 26 142 #define KVM_REQ_HV_CRASH 27 143 144 #define KVM_USERSPACE_IRQ_SOURCE_ID 0 145 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1 146 147 extern struct kmem_cache *kvm_vcpu_cache; 148 149 extern spinlock_t kvm_lock; 150 extern struct list_head vm_list; 151 152 struct kvm_io_range { 153 gpa_t addr; 154 int len; 155 struct kvm_io_device *dev; 156 }; 157 158 #define NR_IOBUS_DEVS 1000 159 160 struct kvm_io_bus { 161 int dev_count; 162 int ioeventfd_count; 163 struct kvm_io_range range[]; 164 }; 165 166 enum kvm_bus { 167 KVM_MMIO_BUS, 168 KVM_PIO_BUS, 169 KVM_VIRTIO_CCW_NOTIFY_BUS, 170 KVM_FAST_MMIO_BUS, 171 KVM_NR_BUSES 172 }; 173 174 int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr, 175 int len, const void *val); 176 int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, 177 gpa_t addr, int len, const void *val, long cookie); 178 int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr, 179 int len, void *val); 180 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, 181 int len, struct kvm_io_device *dev); 182 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx, 183 struct kvm_io_device *dev); 184 185 #ifdef CONFIG_KVM_ASYNC_PF 186 struct kvm_async_pf { 187 struct work_struct work; 188 struct list_head link; 189 struct list_head queue; 190 struct kvm_vcpu *vcpu; 191 struct mm_struct *mm; 192 gva_t gva; 193 unsigned long addr; 194 struct kvm_arch_async_pf arch; 195 bool wakeup_all; 196 }; 197 198 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu); 199 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu); 200 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva, 201 struct kvm_arch_async_pf *arch); 202 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu); 203 #endif 204 205 enum { 206 OUTSIDE_GUEST_MODE, 207 IN_GUEST_MODE, 208 EXITING_GUEST_MODE, 209 READING_SHADOW_PAGE_TABLES, 210 }; 211 212 /* 213 * Sometimes a large or cross-page mmio needs to be broken up into separate 214 * exits for userspace servicing. 215 */ 216 struct kvm_mmio_fragment { 217 gpa_t gpa; 218 void *data; 219 unsigned len; 220 }; 221 222 struct kvm_vcpu { 223 struct kvm *kvm; 224 #ifdef CONFIG_PREEMPT_NOTIFIERS 225 struct preempt_notifier preempt_notifier; 226 #endif 227 int cpu; 228 int vcpu_id; 229 int srcu_idx; 230 int mode; 231 unsigned long requests; 232 unsigned long guest_debug; 233 234 struct mutex mutex; 235 struct kvm_run *run; 236 237 int fpu_active; 238 int guest_fpu_loaded, guest_xcr0_loaded; 239 unsigned char fpu_counter; 240 wait_queue_head_t wq; 241 struct pid *pid; 242 int sigset_active; 243 sigset_t sigset; 244 struct kvm_vcpu_stat stat; 245 unsigned int halt_poll_ns; 246 247 #ifdef CONFIG_HAS_IOMEM 248 int mmio_needed; 249 int mmio_read_completed; 250 int mmio_is_write; 251 int mmio_cur_fragment; 252 int mmio_nr_fragments; 253 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS]; 254 #endif 255 256 #ifdef CONFIG_KVM_ASYNC_PF 257 struct { 258 u32 queued; 259 struct list_head queue; 260 struct list_head done; 261 spinlock_t lock; 262 } async_pf; 263 #endif 264 265 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT 266 /* 267 * Cpu relax intercept or pause loop exit optimization 268 * in_spin_loop: set when a vcpu does a pause loop exit 269 * or cpu relax intercepted. 270 * dy_eligible: indicates whether vcpu is eligible for directed yield. 271 */ 272 struct { 273 bool in_spin_loop; 274 bool dy_eligible; 275 } spin_loop; 276 #endif 277 bool preempted; 278 struct kvm_vcpu_arch arch; 279 }; 280 281 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu) 282 { 283 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE); 284 } 285 286 /* 287 * Some of the bitops functions do not support too long bitmaps. 288 * This number must be determined not to exceed such limits. 289 */ 290 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1) 291 292 struct kvm_memory_slot { 293 gfn_t base_gfn; 294 unsigned long npages; 295 unsigned long *dirty_bitmap; 296 struct kvm_arch_memory_slot arch; 297 unsigned long userspace_addr; 298 u32 flags; 299 short id; 300 }; 301 302 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot) 303 { 304 return ALIGN(memslot->npages, BITS_PER_LONG) / 8; 305 } 306 307 struct kvm_s390_adapter_int { 308 u64 ind_addr; 309 u64 summary_addr; 310 u64 ind_offset; 311 u32 summary_offset; 312 u32 adapter_id; 313 }; 314 315 struct kvm_kernel_irq_routing_entry { 316 u32 gsi; 317 u32 type; 318 int (*set)(struct kvm_kernel_irq_routing_entry *e, 319 struct kvm *kvm, int irq_source_id, int level, 320 bool line_status); 321 union { 322 struct { 323 unsigned irqchip; 324 unsigned pin; 325 } irqchip; 326 struct msi_msg msi; 327 struct kvm_s390_adapter_int adapter; 328 }; 329 struct hlist_node link; 330 }; 331 332 #ifndef KVM_PRIVATE_MEM_SLOTS 333 #define KVM_PRIVATE_MEM_SLOTS 0 334 #endif 335 336 #ifndef KVM_MEM_SLOTS_NUM 337 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS) 338 #endif 339 340 #ifndef __KVM_VCPU_MULTIPLE_ADDRESS_SPACE 341 static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu) 342 { 343 return 0; 344 } 345 #endif 346 347 /* 348 * Note: 349 * memslots are not sorted by id anymore, please use id_to_memslot() 350 * to get the memslot by its id. 351 */ 352 struct kvm_memslots { 353 u64 generation; 354 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM]; 355 /* The mapping table from slot id to the index in memslots[]. */ 356 short id_to_index[KVM_MEM_SLOTS_NUM]; 357 atomic_t lru_slot; 358 int used_slots; 359 }; 360 361 struct kvm { 362 spinlock_t mmu_lock; 363 struct mutex slots_lock; 364 struct mm_struct *mm; /* userspace tied to this vm */ 365 struct kvm_memslots *memslots[KVM_ADDRESS_SPACE_NUM]; 366 struct srcu_struct srcu; 367 struct srcu_struct irq_srcu; 368 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; 369 atomic_t online_vcpus; 370 int last_boosted_vcpu; 371 struct list_head vm_list; 372 struct mutex lock; 373 struct kvm_io_bus *buses[KVM_NR_BUSES]; 374 #ifdef CONFIG_HAVE_KVM_EVENTFD 375 struct { 376 spinlock_t lock; 377 struct list_head items; 378 struct list_head resampler_list; 379 struct mutex resampler_lock; 380 } irqfds; 381 struct list_head ioeventfds; 382 #endif 383 struct kvm_vm_stat stat; 384 struct kvm_arch arch; 385 atomic_t users_count; 386 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET 387 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; 388 spinlock_t ring_lock; 389 struct list_head coalesced_zones; 390 #endif 391 392 struct mutex irq_lock; 393 #ifdef CONFIG_HAVE_KVM_IRQCHIP 394 /* 395 * Update side is protected by irq_lock. 396 */ 397 struct kvm_irq_routing_table __rcu *irq_routing; 398 #endif 399 #ifdef CONFIG_HAVE_KVM_IRQFD 400 struct hlist_head irq_ack_notifier_list; 401 #endif 402 403 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) 404 struct mmu_notifier mmu_notifier; 405 unsigned long mmu_notifier_seq; 406 long mmu_notifier_count; 407 #endif 408 long tlbs_dirty; 409 struct list_head devices; 410 }; 411 412 #define kvm_err(fmt, ...) \ 413 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 414 #define kvm_info(fmt, ...) \ 415 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 416 #define kvm_debug(fmt, ...) \ 417 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 418 #define kvm_pr_unimpl(fmt, ...) \ 419 pr_err_ratelimited("kvm [%i]: " fmt, \ 420 task_tgid_nr(current), ## __VA_ARGS__) 421 422 /* The guest did something we don't support. */ 423 #define vcpu_unimpl(vcpu, fmt, ...) \ 424 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__) 425 426 #define vcpu_debug(vcpu, fmt, ...) \ 427 kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__) 428 429 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i) 430 { 431 /* Pairs with smp_wmb() in kvm_vm_ioctl_create_vcpu, in case 432 * the caller has read kvm->online_vcpus before (as is the case 433 * for kvm_for_each_vcpu, for example). 434 */ 435 smp_rmb(); 436 return kvm->vcpus[i]; 437 } 438 439 #define kvm_for_each_vcpu(idx, vcpup, kvm) \ 440 for (idx = 0; \ 441 idx < atomic_read(&kvm->online_vcpus) && \ 442 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \ 443 idx++) 444 445 #define kvm_for_each_memslot(memslot, slots) \ 446 for (memslot = &slots->memslots[0]; \ 447 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\ 448 memslot++) 449 450 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 451 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 452 453 int __must_check vcpu_load(struct kvm_vcpu *vcpu); 454 void vcpu_put(struct kvm_vcpu *vcpu); 455 456 #ifdef __KVM_HAVE_IOAPIC 457 void kvm_vcpu_request_scan_ioapic(struct kvm *kvm); 458 #else 459 static inline void kvm_vcpu_request_scan_ioapic(struct kvm *kvm) 460 { 461 } 462 #endif 463 464 #ifdef CONFIG_HAVE_KVM_IRQFD 465 int kvm_irqfd_init(void); 466 void kvm_irqfd_exit(void); 467 #else 468 static inline int kvm_irqfd_init(void) 469 { 470 return 0; 471 } 472 473 static inline void kvm_irqfd_exit(void) 474 { 475 } 476 #endif 477 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, 478 struct module *module); 479 void kvm_exit(void); 480 481 void kvm_get_kvm(struct kvm *kvm); 482 void kvm_put_kvm(struct kvm *kvm); 483 484 static inline struct kvm_memslots *__kvm_memslots(struct kvm *kvm, int as_id) 485 { 486 return rcu_dereference_check(kvm->memslots[as_id], 487 srcu_read_lock_held(&kvm->srcu) 488 || lockdep_is_held(&kvm->slots_lock)); 489 } 490 491 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm) 492 { 493 return __kvm_memslots(kvm, 0); 494 } 495 496 static inline struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu) 497 { 498 int as_id = kvm_arch_vcpu_memslots_id(vcpu); 499 500 return __kvm_memslots(vcpu->kvm, as_id); 501 } 502 503 static inline struct kvm_memory_slot * 504 id_to_memslot(struct kvm_memslots *slots, int id) 505 { 506 int index = slots->id_to_index[id]; 507 struct kvm_memory_slot *slot; 508 509 slot = &slots->memslots[index]; 510 511 WARN_ON(slot->id != id); 512 return slot; 513 } 514 515 /* 516 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations: 517 * - create a new memory slot 518 * - delete an existing memory slot 519 * - modify an existing memory slot 520 * -- move it in the guest physical memory space 521 * -- just change its flags 522 * 523 * Since flags can be changed by some of these operations, the following 524 * differentiation is the best we can do for __kvm_set_memory_region(): 525 */ 526 enum kvm_mr_change { 527 KVM_MR_CREATE, 528 KVM_MR_DELETE, 529 KVM_MR_MOVE, 530 KVM_MR_FLAGS_ONLY, 531 }; 532 533 int kvm_set_memory_region(struct kvm *kvm, 534 const struct kvm_userspace_memory_region *mem); 535 int __kvm_set_memory_region(struct kvm *kvm, 536 const struct kvm_userspace_memory_region *mem); 537 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, 538 struct kvm_memory_slot *dont); 539 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, 540 unsigned long npages); 541 void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots); 542 int kvm_arch_prepare_memory_region(struct kvm *kvm, 543 struct kvm_memory_slot *memslot, 544 const struct kvm_userspace_memory_region *mem, 545 enum kvm_mr_change change); 546 void kvm_arch_commit_memory_region(struct kvm *kvm, 547 const struct kvm_userspace_memory_region *mem, 548 const struct kvm_memory_slot *old, 549 const struct kvm_memory_slot *new, 550 enum kvm_mr_change change); 551 bool kvm_largepages_enabled(void); 552 void kvm_disable_largepages(void); 553 /* flush all memory translations */ 554 void kvm_arch_flush_shadow_all(struct kvm *kvm); 555 /* flush memory translations pointing to 'slot' */ 556 void kvm_arch_flush_shadow_memslot(struct kvm *kvm, 557 struct kvm_memory_slot *slot); 558 559 int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn, 560 struct page **pages, int nr_pages); 561 562 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 563 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); 564 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable); 565 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn); 566 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn, 567 bool *writable); 568 void kvm_release_page_clean(struct page *page); 569 void kvm_release_page_dirty(struct page *page); 570 void kvm_set_page_accessed(struct page *page); 571 572 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn); 573 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); 574 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault, 575 bool *writable); 576 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn); 577 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn); 578 pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn, bool atomic, 579 bool *async, bool write_fault, bool *writable); 580 581 void kvm_release_pfn_clean(pfn_t pfn); 582 void kvm_set_pfn_dirty(pfn_t pfn); 583 void kvm_set_pfn_accessed(pfn_t pfn); 584 void kvm_get_pfn(pfn_t pfn); 585 586 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 587 int len); 588 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 589 unsigned long len); 590 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 591 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 592 void *data, unsigned long len); 593 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 594 int offset, int len); 595 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 596 unsigned long len); 597 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 598 void *data, unsigned long len); 599 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 600 gpa_t gpa, unsigned long len); 601 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 602 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 603 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 604 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 605 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn); 606 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 607 608 struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu); 609 struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn); 610 pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn); 611 pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn); 612 struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn); 613 unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn); 614 unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable); 615 int kvm_vcpu_read_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, void *data, int offset, 616 int len); 617 int kvm_vcpu_read_guest_atomic(struct kvm_vcpu *vcpu, gpa_t gpa, void *data, 618 unsigned long len); 619 int kvm_vcpu_read_guest(struct kvm_vcpu *vcpu, gpa_t gpa, void *data, 620 unsigned long len); 621 int kvm_vcpu_write_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, const void *data, 622 int offset, int len); 623 int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data, 624 unsigned long len); 625 void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn); 626 627 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 628 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 629 int kvm_vcpu_yield_to(struct kvm_vcpu *target); 630 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu); 631 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 632 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 633 634 void kvm_flush_remote_tlbs(struct kvm *kvm); 635 void kvm_reload_remote_mmus(struct kvm *kvm); 636 void kvm_make_mclock_inprogress_request(struct kvm *kvm); 637 void kvm_make_scan_ioapic_request(struct kvm *kvm); 638 bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req); 639 640 long kvm_arch_dev_ioctl(struct file *filp, 641 unsigned int ioctl, unsigned long arg); 642 long kvm_arch_vcpu_ioctl(struct file *filp, 643 unsigned int ioctl, unsigned long arg); 644 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf); 645 646 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext); 647 648 int kvm_get_dirty_log(struct kvm *kvm, 649 struct kvm_dirty_log *log, int *is_dirty); 650 651 int kvm_get_dirty_log_protect(struct kvm *kvm, 652 struct kvm_dirty_log *log, bool *is_dirty); 653 654 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm, 655 struct kvm_memory_slot *slot, 656 gfn_t gfn_offset, 657 unsigned long mask); 658 659 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 660 struct kvm_dirty_log *log); 661 662 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, 663 bool line_status); 664 long kvm_arch_vm_ioctl(struct file *filp, 665 unsigned int ioctl, unsigned long arg); 666 667 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 668 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 669 670 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 671 struct kvm_translation *tr); 672 673 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 674 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 675 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 676 struct kvm_sregs *sregs); 677 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 678 struct kvm_sregs *sregs); 679 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 680 struct kvm_mp_state *mp_state); 681 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 682 struct kvm_mp_state *mp_state); 683 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 684 struct kvm_guest_debug *dbg); 685 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 686 687 int kvm_arch_init(void *opaque); 688 void kvm_arch_exit(void); 689 690 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 691 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 692 693 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu); 694 695 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); 696 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 697 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 698 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); 699 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); 700 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu); 701 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); 702 703 int kvm_arch_hardware_enable(void); 704 void kvm_arch_hardware_disable(void); 705 int kvm_arch_hardware_setup(void); 706 void kvm_arch_hardware_unsetup(void); 707 void kvm_arch_check_processor_compat(void *rtn); 708 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); 709 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu); 710 711 void *kvm_kvzalloc(unsigned long size); 712 713 #ifndef __KVM_HAVE_ARCH_VM_ALLOC 714 static inline struct kvm *kvm_arch_alloc_vm(void) 715 { 716 return kzalloc(sizeof(struct kvm), GFP_KERNEL); 717 } 718 719 static inline void kvm_arch_free_vm(struct kvm *kvm) 720 { 721 kfree(kvm); 722 } 723 #endif 724 725 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA 726 void kvm_arch_register_noncoherent_dma(struct kvm *kvm); 727 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm); 728 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm); 729 #else 730 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm) 731 { 732 } 733 734 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm) 735 { 736 } 737 738 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm) 739 { 740 return false; 741 } 742 #endif 743 #ifdef __KVM_HAVE_ARCH_ASSIGNED_DEVICE 744 void kvm_arch_start_assignment(struct kvm *kvm); 745 void kvm_arch_end_assignment(struct kvm *kvm); 746 bool kvm_arch_has_assigned_device(struct kvm *kvm); 747 #else 748 static inline void kvm_arch_start_assignment(struct kvm *kvm) 749 { 750 } 751 752 static inline void kvm_arch_end_assignment(struct kvm *kvm) 753 { 754 } 755 756 static inline bool kvm_arch_has_assigned_device(struct kvm *kvm) 757 { 758 return false; 759 } 760 #endif 761 762 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu) 763 { 764 #ifdef __KVM_HAVE_ARCH_WQP 765 return vcpu->arch.wqp; 766 #else 767 return &vcpu->wq; 768 #endif 769 } 770 771 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED 772 /* 773 * returns true if the virtual interrupt controller is initialized and 774 * ready to accept virtual IRQ. On some architectures the virtual interrupt 775 * controller is dynamically instantiated and this is not always true. 776 */ 777 bool kvm_arch_intc_initialized(struct kvm *kvm); 778 #else 779 static inline bool kvm_arch_intc_initialized(struct kvm *kvm) 780 { 781 return true; 782 } 783 #endif 784 785 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type); 786 void kvm_arch_destroy_vm(struct kvm *kvm); 787 void kvm_arch_sync_events(struct kvm *kvm); 788 789 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); 790 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 791 792 bool kvm_is_reserved_pfn(pfn_t pfn); 793 794 struct kvm_irq_ack_notifier { 795 struct hlist_node link; 796 unsigned gsi; 797 void (*irq_acked)(struct kvm_irq_ack_notifier *kian); 798 }; 799 800 int kvm_irq_map_gsi(struct kvm *kvm, 801 struct kvm_kernel_irq_routing_entry *entries, int gsi); 802 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin); 803 804 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level, 805 bool line_status); 806 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level); 807 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm, 808 int irq_source_id, int level, bool line_status); 809 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin); 810 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin); 811 void kvm_register_irq_ack_notifier(struct kvm *kvm, 812 struct kvm_irq_ack_notifier *kian); 813 void kvm_unregister_irq_ack_notifier(struct kvm *kvm, 814 struct kvm_irq_ack_notifier *kian); 815 int kvm_request_irq_source_id(struct kvm *kvm); 816 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); 817 818 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT 819 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot); 820 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot); 821 #else 822 static inline int kvm_iommu_map_pages(struct kvm *kvm, 823 struct kvm_memory_slot *slot) 824 { 825 return 0; 826 } 827 828 static inline void kvm_iommu_unmap_pages(struct kvm *kvm, 829 struct kvm_memory_slot *slot) 830 { 831 } 832 #endif 833 834 /* must be called with irqs disabled */ 835 static inline void __kvm_guest_enter(void) 836 { 837 guest_enter(); 838 /* KVM does not hold any references to rcu protected data when it 839 * switches CPU into a guest mode. In fact switching to a guest mode 840 * is very similar to exiting to userspace from rcu point of view. In 841 * addition CPU may stay in a guest mode for quite a long time (up to 842 * one time slice). Lets treat guest mode as quiescent state, just like 843 * we do with user-mode execution. 844 */ 845 if (!context_tracking_cpu_is_enabled()) 846 rcu_virt_note_context_switch(smp_processor_id()); 847 } 848 849 /* must be called with irqs disabled */ 850 static inline void __kvm_guest_exit(void) 851 { 852 guest_exit(); 853 } 854 855 static inline void kvm_guest_enter(void) 856 { 857 unsigned long flags; 858 859 local_irq_save(flags); 860 __kvm_guest_enter(); 861 local_irq_restore(flags); 862 } 863 864 static inline void kvm_guest_exit(void) 865 { 866 unsigned long flags; 867 868 local_irq_save(flags); 869 __kvm_guest_exit(); 870 local_irq_restore(flags); 871 } 872 873 /* 874 * search_memslots() and __gfn_to_memslot() are here because they are 875 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c. 876 * gfn_to_memslot() itself isn't here as an inline because that would 877 * bloat other code too much. 878 */ 879 static inline struct kvm_memory_slot * 880 search_memslots(struct kvm_memslots *slots, gfn_t gfn) 881 { 882 int start = 0, end = slots->used_slots; 883 int slot = atomic_read(&slots->lru_slot); 884 struct kvm_memory_slot *memslots = slots->memslots; 885 886 if (gfn >= memslots[slot].base_gfn && 887 gfn < memslots[slot].base_gfn + memslots[slot].npages) 888 return &memslots[slot]; 889 890 while (start < end) { 891 slot = start + (end - start) / 2; 892 893 if (gfn >= memslots[slot].base_gfn) 894 end = slot; 895 else 896 start = slot + 1; 897 } 898 899 if (gfn >= memslots[start].base_gfn && 900 gfn < memslots[start].base_gfn + memslots[start].npages) { 901 atomic_set(&slots->lru_slot, start); 902 return &memslots[start]; 903 } 904 905 return NULL; 906 } 907 908 static inline struct kvm_memory_slot * 909 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn) 910 { 911 return search_memslots(slots, gfn); 912 } 913 914 static inline unsigned long 915 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn) 916 { 917 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE; 918 } 919 920 static inline int memslot_id(struct kvm *kvm, gfn_t gfn) 921 { 922 return gfn_to_memslot(kvm, gfn)->id; 923 } 924 925 static inline gfn_t 926 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot) 927 { 928 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT; 929 930 return slot->base_gfn + gfn_offset; 931 } 932 933 static inline gpa_t gfn_to_gpa(gfn_t gfn) 934 { 935 return (gpa_t)gfn << PAGE_SHIFT; 936 } 937 938 static inline gfn_t gpa_to_gfn(gpa_t gpa) 939 { 940 return (gfn_t)(gpa >> PAGE_SHIFT); 941 } 942 943 static inline hpa_t pfn_to_hpa(pfn_t pfn) 944 { 945 return (hpa_t)pfn << PAGE_SHIFT; 946 } 947 948 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa) 949 { 950 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa)); 951 952 return kvm_is_error_hva(hva); 953 } 954 955 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) 956 { 957 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 958 } 959 960 enum kvm_stat_kind { 961 KVM_STAT_VM, 962 KVM_STAT_VCPU, 963 }; 964 965 struct kvm_stats_debugfs_item { 966 const char *name; 967 int offset; 968 enum kvm_stat_kind kind; 969 struct dentry *dentry; 970 }; 971 extern struct kvm_stats_debugfs_item debugfs_entries[]; 972 extern struct dentry *kvm_debugfs_dir; 973 974 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) 975 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq) 976 { 977 if (unlikely(kvm->mmu_notifier_count)) 978 return 1; 979 /* 980 * Ensure the read of mmu_notifier_count happens before the read 981 * of mmu_notifier_seq. This interacts with the smp_wmb() in 982 * mmu_notifier_invalidate_range_end to make sure that the caller 983 * either sees the old (non-zero) value of mmu_notifier_count or 984 * the new (incremented) value of mmu_notifier_seq. 985 * PowerPC Book3s HV KVM calls this under a per-page lock 986 * rather than under kvm->mmu_lock, for scalability, so 987 * can't rely on kvm->mmu_lock to keep things ordered. 988 */ 989 smp_rmb(); 990 if (kvm->mmu_notifier_seq != mmu_seq) 991 return 1; 992 return 0; 993 } 994 #endif 995 996 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING 997 998 #ifdef CONFIG_S390 999 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that... 1000 #else 1001 #define KVM_MAX_IRQ_ROUTES 1024 1002 #endif 1003 1004 int kvm_setup_default_irq_routing(struct kvm *kvm); 1005 int kvm_set_irq_routing(struct kvm *kvm, 1006 const struct kvm_irq_routing_entry *entries, 1007 unsigned nr, 1008 unsigned flags); 1009 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e, 1010 const struct kvm_irq_routing_entry *ue); 1011 void kvm_free_irq_routing(struct kvm *kvm); 1012 1013 #else 1014 1015 static inline void kvm_free_irq_routing(struct kvm *kvm) {} 1016 1017 #endif 1018 1019 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi); 1020 1021 #ifdef CONFIG_HAVE_KVM_EVENTFD 1022 1023 void kvm_eventfd_init(struct kvm *kvm); 1024 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args); 1025 1026 #ifdef CONFIG_HAVE_KVM_IRQFD 1027 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args); 1028 void kvm_irqfd_release(struct kvm *kvm); 1029 void kvm_irq_routing_update(struct kvm *); 1030 #else 1031 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args) 1032 { 1033 return -EINVAL; 1034 } 1035 1036 static inline void kvm_irqfd_release(struct kvm *kvm) {} 1037 #endif 1038 1039 #else 1040 1041 static inline void kvm_eventfd_init(struct kvm *kvm) {} 1042 1043 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args) 1044 { 1045 return -EINVAL; 1046 } 1047 1048 static inline void kvm_irqfd_release(struct kvm *kvm) {} 1049 1050 #ifdef CONFIG_HAVE_KVM_IRQCHIP 1051 static inline void kvm_irq_routing_update(struct kvm *kvm) 1052 { 1053 } 1054 #endif 1055 1056 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) 1057 { 1058 return -ENOSYS; 1059 } 1060 1061 #endif /* CONFIG_HAVE_KVM_EVENTFD */ 1062 1063 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 1064 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu); 1065 #else 1066 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; } 1067 #endif 1068 1069 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu) 1070 { 1071 set_bit(req, &vcpu->requests); 1072 } 1073 1074 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu) 1075 { 1076 if (test_bit(req, &vcpu->requests)) { 1077 clear_bit(req, &vcpu->requests); 1078 return true; 1079 } else { 1080 return false; 1081 } 1082 } 1083 1084 extern bool kvm_rebooting; 1085 1086 struct kvm_device { 1087 struct kvm_device_ops *ops; 1088 struct kvm *kvm; 1089 void *private; 1090 struct list_head vm_node; 1091 }; 1092 1093 /* create, destroy, and name are mandatory */ 1094 struct kvm_device_ops { 1095 const char *name; 1096 int (*create)(struct kvm_device *dev, u32 type); 1097 1098 /* 1099 * Destroy is responsible for freeing dev. 1100 * 1101 * Destroy may be called before or after destructors are called 1102 * on emulated I/O regions, depending on whether a reference is 1103 * held by a vcpu or other kvm component that gets destroyed 1104 * after the emulated I/O. 1105 */ 1106 void (*destroy)(struct kvm_device *dev); 1107 1108 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); 1109 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); 1110 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); 1111 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl, 1112 unsigned long arg); 1113 }; 1114 1115 void kvm_device_get(struct kvm_device *dev); 1116 void kvm_device_put(struct kvm_device *dev); 1117 struct kvm_device *kvm_device_from_filp(struct file *filp); 1118 int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type); 1119 void kvm_unregister_device_ops(u32 type); 1120 1121 extern struct kvm_device_ops kvm_mpic_ops; 1122 extern struct kvm_device_ops kvm_xics_ops; 1123 extern struct kvm_device_ops kvm_arm_vgic_v2_ops; 1124 extern struct kvm_device_ops kvm_arm_vgic_v3_ops; 1125 1126 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT 1127 1128 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val) 1129 { 1130 vcpu->spin_loop.in_spin_loop = val; 1131 } 1132 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val) 1133 { 1134 vcpu->spin_loop.dy_eligible = val; 1135 } 1136 1137 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */ 1138 1139 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val) 1140 { 1141 } 1142 1143 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val) 1144 { 1145 } 1146 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */ 1147 #endif 1148 1149