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 /* 48 * For the normal pfn, the highest 12 bits should be zero, 49 * so we can mask bit 62 ~ bit 52 to indicate the error pfn, 50 * mask bit 63 to indicate the noslot pfn. 51 */ 52 #define KVM_PFN_ERR_MASK (0x7ffULL << 52) 53 #define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52) 54 #define KVM_PFN_NOSLOT (0x1ULL << 63) 55 56 #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK) 57 #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1) 58 #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2) 59 60 /* 61 * error pfns indicate that the gfn is in slot but faild to 62 * translate it to pfn on host. 63 */ 64 static inline bool is_error_pfn(pfn_t pfn) 65 { 66 return !!(pfn & KVM_PFN_ERR_MASK); 67 } 68 69 /* 70 * error_noslot pfns indicate that the gfn can not be 71 * translated to pfn - it is not in slot or failed to 72 * translate it to pfn. 73 */ 74 static inline bool is_error_noslot_pfn(pfn_t pfn) 75 { 76 return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK); 77 } 78 79 /* noslot pfn indicates that the gfn is not in slot. */ 80 static inline bool is_noslot_pfn(pfn_t pfn) 81 { 82 return pfn == KVM_PFN_NOSLOT; 83 } 84 85 /* 86 * architectures with KVM_HVA_ERR_BAD other than PAGE_OFFSET (e.g. s390) 87 * provide own defines and kvm_is_error_hva 88 */ 89 #ifndef KVM_HVA_ERR_BAD 90 91 #define KVM_HVA_ERR_BAD (PAGE_OFFSET) 92 #define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE) 93 94 static inline bool kvm_is_error_hva(unsigned long addr) 95 { 96 return addr >= PAGE_OFFSET; 97 } 98 99 #endif 100 101 #define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT)) 102 103 static inline bool is_error_page(struct page *page) 104 { 105 return IS_ERR(page); 106 } 107 108 /* 109 * vcpu->requests bit members 110 */ 111 #define KVM_REQ_TLB_FLUSH 0 112 #define KVM_REQ_MIGRATE_TIMER 1 113 #define KVM_REQ_REPORT_TPR_ACCESS 2 114 #define KVM_REQ_MMU_RELOAD 3 115 #define KVM_REQ_TRIPLE_FAULT 4 116 #define KVM_REQ_PENDING_TIMER 5 117 #define KVM_REQ_UNHALT 6 118 #define KVM_REQ_MMU_SYNC 7 119 #define KVM_REQ_CLOCK_UPDATE 8 120 #define KVM_REQ_KICK 9 121 #define KVM_REQ_DEACTIVATE_FPU 10 122 #define KVM_REQ_EVENT 11 123 #define KVM_REQ_APF_HALT 12 124 #define KVM_REQ_STEAL_UPDATE 13 125 #define KVM_REQ_NMI 14 126 #define KVM_REQ_PMU 15 127 #define KVM_REQ_PMI 16 128 #define KVM_REQ_WATCHDOG 17 129 #define KVM_REQ_MASTERCLOCK_UPDATE 18 130 #define KVM_REQ_MCLOCK_INPROGRESS 19 131 #define KVM_REQ_EPR_EXIT 20 132 #define KVM_REQ_SCAN_IOAPIC 21 133 #define KVM_REQ_GLOBAL_CLOCK_UPDATE 22 134 #define KVM_REQ_ENABLE_IBS 23 135 #define KVM_REQ_DISABLE_IBS 24 136 #define KVM_REQ_APIC_PAGE_RELOAD 25 137 138 #define KVM_USERSPACE_IRQ_SOURCE_ID 0 139 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1 140 141 extern struct kmem_cache *kvm_vcpu_cache; 142 143 extern spinlock_t kvm_lock; 144 extern struct list_head vm_list; 145 146 struct kvm_io_range { 147 gpa_t addr; 148 int len; 149 struct kvm_io_device *dev; 150 }; 151 152 #define NR_IOBUS_DEVS 1000 153 154 struct kvm_io_bus { 155 int dev_count; 156 int ioeventfd_count; 157 struct kvm_io_range range[]; 158 }; 159 160 enum kvm_bus { 161 KVM_MMIO_BUS, 162 KVM_PIO_BUS, 163 KVM_VIRTIO_CCW_NOTIFY_BUS, 164 KVM_FAST_MMIO_BUS, 165 KVM_NR_BUSES 166 }; 167 168 int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr, 169 int len, const void *val); 170 int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, 171 gpa_t addr, int len, const void *val, long cookie); 172 int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr, 173 int len, void *val); 174 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, 175 int len, struct kvm_io_device *dev); 176 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx, 177 struct kvm_io_device *dev); 178 179 #ifdef CONFIG_KVM_ASYNC_PF 180 struct kvm_async_pf { 181 struct work_struct work; 182 struct list_head link; 183 struct list_head queue; 184 struct kvm_vcpu *vcpu; 185 struct mm_struct *mm; 186 gva_t gva; 187 unsigned long addr; 188 struct kvm_arch_async_pf arch; 189 bool wakeup_all; 190 }; 191 192 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu); 193 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu); 194 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva, 195 struct kvm_arch_async_pf *arch); 196 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu); 197 #endif 198 199 enum { 200 OUTSIDE_GUEST_MODE, 201 IN_GUEST_MODE, 202 EXITING_GUEST_MODE, 203 READING_SHADOW_PAGE_TABLES, 204 }; 205 206 /* 207 * Sometimes a large or cross-page mmio needs to be broken up into separate 208 * exits for userspace servicing. 209 */ 210 struct kvm_mmio_fragment { 211 gpa_t gpa; 212 void *data; 213 unsigned len; 214 }; 215 216 struct kvm_vcpu { 217 struct kvm *kvm; 218 #ifdef CONFIG_PREEMPT_NOTIFIERS 219 struct preempt_notifier preempt_notifier; 220 #endif 221 int cpu; 222 int vcpu_id; 223 int srcu_idx; 224 int mode; 225 unsigned long requests; 226 unsigned long guest_debug; 227 228 struct mutex mutex; 229 struct kvm_run *run; 230 231 int fpu_active; 232 int guest_fpu_loaded, guest_xcr0_loaded; 233 wait_queue_head_t wq; 234 struct pid *pid; 235 int sigset_active; 236 sigset_t sigset; 237 struct kvm_vcpu_stat stat; 238 239 #ifdef CONFIG_HAS_IOMEM 240 int mmio_needed; 241 int mmio_read_completed; 242 int mmio_is_write; 243 int mmio_cur_fragment; 244 int mmio_nr_fragments; 245 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS]; 246 #endif 247 248 #ifdef CONFIG_KVM_ASYNC_PF 249 struct { 250 u32 queued; 251 struct list_head queue; 252 struct list_head done; 253 spinlock_t lock; 254 } async_pf; 255 #endif 256 257 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT 258 /* 259 * Cpu relax intercept or pause loop exit optimization 260 * in_spin_loop: set when a vcpu does a pause loop exit 261 * or cpu relax intercepted. 262 * dy_eligible: indicates whether vcpu is eligible for directed yield. 263 */ 264 struct { 265 bool in_spin_loop; 266 bool dy_eligible; 267 } spin_loop; 268 #endif 269 bool preempted; 270 struct kvm_vcpu_arch arch; 271 }; 272 273 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu) 274 { 275 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE); 276 } 277 278 /* 279 * Some of the bitops functions do not support too long bitmaps. 280 * This number must be determined not to exceed such limits. 281 */ 282 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1) 283 284 struct kvm_memory_slot { 285 gfn_t base_gfn; 286 unsigned long npages; 287 unsigned long *dirty_bitmap; 288 struct kvm_arch_memory_slot arch; 289 unsigned long userspace_addr; 290 u32 flags; 291 short id; 292 }; 293 294 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot) 295 { 296 return ALIGN(memslot->npages, BITS_PER_LONG) / 8; 297 } 298 299 struct kvm_s390_adapter_int { 300 u64 ind_addr; 301 u64 summary_addr; 302 u64 ind_offset; 303 u32 summary_offset; 304 u32 adapter_id; 305 }; 306 307 struct kvm_kernel_irq_routing_entry { 308 u32 gsi; 309 u32 type; 310 int (*set)(struct kvm_kernel_irq_routing_entry *e, 311 struct kvm *kvm, int irq_source_id, int level, 312 bool line_status); 313 union { 314 struct { 315 unsigned irqchip; 316 unsigned pin; 317 } irqchip; 318 struct msi_msg msi; 319 struct kvm_s390_adapter_int adapter; 320 }; 321 struct hlist_node link; 322 }; 323 324 #ifndef KVM_PRIVATE_MEM_SLOTS 325 #define KVM_PRIVATE_MEM_SLOTS 0 326 #endif 327 328 #ifndef KVM_MEM_SLOTS_NUM 329 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS) 330 #endif 331 332 /* 333 * Note: 334 * memslots are not sorted by id anymore, please use id_to_memslot() 335 * to get the memslot by its id. 336 */ 337 struct kvm_memslots { 338 u64 generation; 339 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM]; 340 /* The mapping table from slot id to the index in memslots[]. */ 341 short id_to_index[KVM_MEM_SLOTS_NUM]; 342 atomic_t lru_slot; 343 int used_slots; 344 }; 345 346 struct kvm { 347 spinlock_t mmu_lock; 348 struct mutex slots_lock; 349 struct mm_struct *mm; /* userspace tied to this vm */ 350 struct kvm_memslots *memslots; 351 struct srcu_struct srcu; 352 struct srcu_struct irq_srcu; 353 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 354 u32 bsp_vcpu_id; 355 #endif 356 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; 357 atomic_t online_vcpus; 358 int last_boosted_vcpu; 359 struct list_head vm_list; 360 struct mutex lock; 361 struct kvm_io_bus *buses[KVM_NR_BUSES]; 362 #ifdef CONFIG_HAVE_KVM_EVENTFD 363 struct { 364 spinlock_t lock; 365 struct list_head items; 366 struct list_head resampler_list; 367 struct mutex resampler_lock; 368 } irqfds; 369 struct list_head ioeventfds; 370 #endif 371 struct kvm_vm_stat stat; 372 struct kvm_arch arch; 373 atomic_t users_count; 374 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET 375 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; 376 spinlock_t ring_lock; 377 struct list_head coalesced_zones; 378 #endif 379 380 struct mutex irq_lock; 381 #ifdef CONFIG_HAVE_KVM_IRQCHIP 382 /* 383 * Update side is protected by irq_lock. 384 */ 385 struct kvm_irq_routing_table __rcu *irq_routing; 386 #endif 387 #ifdef CONFIG_HAVE_KVM_IRQFD 388 struct hlist_head irq_ack_notifier_list; 389 #endif 390 391 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) 392 struct mmu_notifier mmu_notifier; 393 unsigned long mmu_notifier_seq; 394 long mmu_notifier_count; 395 #endif 396 long tlbs_dirty; 397 struct list_head devices; 398 }; 399 400 #define kvm_err(fmt, ...) \ 401 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 402 #define kvm_info(fmt, ...) \ 403 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 404 #define kvm_debug(fmt, ...) \ 405 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 406 #define kvm_pr_unimpl(fmt, ...) \ 407 pr_err_ratelimited("kvm [%i]: " fmt, \ 408 task_tgid_nr(current), ## __VA_ARGS__) 409 410 /* The guest did something we don't support. */ 411 #define vcpu_unimpl(vcpu, fmt, ...) \ 412 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__) 413 414 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i) 415 { 416 smp_rmb(); 417 return kvm->vcpus[i]; 418 } 419 420 #define kvm_for_each_vcpu(idx, vcpup, kvm) \ 421 for (idx = 0; \ 422 idx < atomic_read(&kvm->online_vcpus) && \ 423 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \ 424 idx++) 425 426 #define kvm_for_each_memslot(memslot, slots) \ 427 for (memslot = &slots->memslots[0]; \ 428 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\ 429 memslot++) 430 431 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 432 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 433 434 int __must_check vcpu_load(struct kvm_vcpu *vcpu); 435 void vcpu_put(struct kvm_vcpu *vcpu); 436 437 #ifdef __KVM_HAVE_IOAPIC 438 void kvm_vcpu_request_scan_ioapic(struct kvm *kvm); 439 #else 440 static inline void kvm_vcpu_request_scan_ioapic(struct kvm *kvm) 441 { 442 } 443 #endif 444 445 #ifdef CONFIG_HAVE_KVM_IRQFD 446 int kvm_irqfd_init(void); 447 void kvm_irqfd_exit(void); 448 #else 449 static inline int kvm_irqfd_init(void) 450 { 451 return 0; 452 } 453 454 static inline void kvm_irqfd_exit(void) 455 { 456 } 457 #endif 458 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, 459 struct module *module); 460 void kvm_exit(void); 461 462 void kvm_get_kvm(struct kvm *kvm); 463 void kvm_put_kvm(struct kvm *kvm); 464 465 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm) 466 { 467 return rcu_dereference_check(kvm->memslots, 468 srcu_read_lock_held(&kvm->srcu) 469 || lockdep_is_held(&kvm->slots_lock)); 470 } 471 472 static inline struct kvm_memory_slot * 473 id_to_memslot(struct kvm_memslots *slots, int id) 474 { 475 int index = slots->id_to_index[id]; 476 struct kvm_memory_slot *slot; 477 478 slot = &slots->memslots[index]; 479 480 WARN_ON(slot->id != id); 481 return slot; 482 } 483 484 /* 485 * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations: 486 * - create a new memory slot 487 * - delete an existing memory slot 488 * - modify an existing memory slot 489 * -- move it in the guest physical memory space 490 * -- just change its flags 491 * 492 * Since flags can be changed by some of these operations, the following 493 * differentiation is the best we can do for __kvm_set_memory_region(): 494 */ 495 enum kvm_mr_change { 496 KVM_MR_CREATE, 497 KVM_MR_DELETE, 498 KVM_MR_MOVE, 499 KVM_MR_FLAGS_ONLY, 500 }; 501 502 int kvm_set_memory_region(struct kvm *kvm, 503 struct kvm_userspace_memory_region *mem); 504 int __kvm_set_memory_region(struct kvm *kvm, 505 struct kvm_userspace_memory_region *mem); 506 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, 507 struct kvm_memory_slot *dont); 508 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, 509 unsigned long npages); 510 void kvm_arch_memslots_updated(struct kvm *kvm); 511 int kvm_arch_prepare_memory_region(struct kvm *kvm, 512 struct kvm_memory_slot *memslot, 513 struct kvm_userspace_memory_region *mem, 514 enum kvm_mr_change change); 515 void kvm_arch_commit_memory_region(struct kvm *kvm, 516 struct kvm_userspace_memory_region *mem, 517 const struct kvm_memory_slot *old, 518 enum kvm_mr_change change); 519 bool kvm_largepages_enabled(void); 520 void kvm_disable_largepages(void); 521 /* flush all memory translations */ 522 void kvm_arch_flush_shadow_all(struct kvm *kvm); 523 /* flush memory translations pointing to 'slot' */ 524 void kvm_arch_flush_shadow_memslot(struct kvm *kvm, 525 struct kvm_memory_slot *slot); 526 527 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages, 528 int nr_pages); 529 530 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 531 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); 532 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable); 533 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn); 534 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn, 535 bool *writable); 536 void kvm_release_page_clean(struct page *page); 537 void kvm_release_page_dirty(struct page *page); 538 void kvm_set_page_accessed(struct page *page); 539 540 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn); 541 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async, 542 bool write_fault, bool *writable); 543 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); 544 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault, 545 bool *writable); 546 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn); 547 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn); 548 549 void kvm_release_pfn_clean(pfn_t pfn); 550 void kvm_set_pfn_dirty(pfn_t pfn); 551 void kvm_set_pfn_accessed(pfn_t pfn); 552 void kvm_get_pfn(pfn_t pfn); 553 554 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 555 int len); 556 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 557 unsigned long len); 558 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 559 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 560 void *data, unsigned long len); 561 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 562 int offset, int len); 563 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 564 unsigned long len); 565 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 566 void *data, unsigned long len); 567 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 568 gpa_t gpa, unsigned long len); 569 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 570 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 571 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 572 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 573 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn); 574 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 575 576 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 577 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 578 int kvm_vcpu_yield_to(struct kvm_vcpu *target); 579 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu); 580 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 581 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 582 583 void kvm_flush_remote_tlbs(struct kvm *kvm); 584 void kvm_reload_remote_mmus(struct kvm *kvm); 585 void kvm_make_mclock_inprogress_request(struct kvm *kvm); 586 void kvm_make_scan_ioapic_request(struct kvm *kvm); 587 bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req); 588 589 long kvm_arch_dev_ioctl(struct file *filp, 590 unsigned int ioctl, unsigned long arg); 591 long kvm_arch_vcpu_ioctl(struct file *filp, 592 unsigned int ioctl, unsigned long arg); 593 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf); 594 595 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext); 596 597 int kvm_get_dirty_log(struct kvm *kvm, 598 struct kvm_dirty_log *log, int *is_dirty); 599 600 int kvm_get_dirty_log_protect(struct kvm *kvm, 601 struct kvm_dirty_log *log, bool *is_dirty); 602 603 void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm, 604 struct kvm_memory_slot *slot, 605 gfn_t gfn_offset, 606 unsigned long mask); 607 608 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 609 struct kvm_dirty_log *log); 610 611 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, 612 bool line_status); 613 long kvm_arch_vm_ioctl(struct file *filp, 614 unsigned int ioctl, unsigned long arg); 615 616 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 617 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 618 619 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 620 struct kvm_translation *tr); 621 622 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 623 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 624 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 625 struct kvm_sregs *sregs); 626 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 627 struct kvm_sregs *sregs); 628 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 629 struct kvm_mp_state *mp_state); 630 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 631 struct kvm_mp_state *mp_state); 632 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 633 struct kvm_guest_debug *dbg); 634 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 635 636 int kvm_arch_init(void *opaque); 637 void kvm_arch_exit(void); 638 639 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 640 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 641 642 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu); 643 644 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); 645 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 646 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 647 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); 648 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); 649 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu); 650 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); 651 652 int kvm_arch_hardware_enable(void); 653 void kvm_arch_hardware_disable(void); 654 int kvm_arch_hardware_setup(void); 655 void kvm_arch_hardware_unsetup(void); 656 void kvm_arch_check_processor_compat(void *rtn); 657 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); 658 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu); 659 660 void *kvm_kvzalloc(unsigned long size); 661 662 #ifndef __KVM_HAVE_ARCH_VM_ALLOC 663 static inline struct kvm *kvm_arch_alloc_vm(void) 664 { 665 return kzalloc(sizeof(struct kvm), GFP_KERNEL); 666 } 667 668 static inline void kvm_arch_free_vm(struct kvm *kvm) 669 { 670 kfree(kvm); 671 } 672 #endif 673 674 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA 675 void kvm_arch_register_noncoherent_dma(struct kvm *kvm); 676 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm); 677 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm); 678 #else 679 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm) 680 { 681 } 682 683 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm) 684 { 685 } 686 687 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm) 688 { 689 return false; 690 } 691 #endif 692 693 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu) 694 { 695 #ifdef __KVM_HAVE_ARCH_WQP 696 return vcpu->arch.wqp; 697 #else 698 return &vcpu->wq; 699 #endif 700 } 701 702 #ifdef __KVM_HAVE_ARCH_INTC_INITIALIZED 703 /* 704 * returns true if the virtual interrupt controller is initialized and 705 * ready to accept virtual IRQ. On some architectures the virtual interrupt 706 * controller is dynamically instantiated and this is not always true. 707 */ 708 bool kvm_arch_intc_initialized(struct kvm *kvm); 709 #else 710 static inline bool kvm_arch_intc_initialized(struct kvm *kvm) 711 { 712 return true; 713 } 714 #endif 715 716 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type); 717 void kvm_arch_destroy_vm(struct kvm *kvm); 718 void kvm_arch_sync_events(struct kvm *kvm); 719 720 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); 721 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 722 723 bool kvm_is_reserved_pfn(pfn_t pfn); 724 725 struct kvm_irq_ack_notifier { 726 struct hlist_node link; 727 unsigned gsi; 728 void (*irq_acked)(struct kvm_irq_ack_notifier *kian); 729 }; 730 731 int kvm_irq_map_gsi(struct kvm *kvm, 732 struct kvm_kernel_irq_routing_entry *entries, int gsi); 733 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin); 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 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT 750 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot); 751 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot); 752 #else 753 static inline int kvm_iommu_map_pages(struct kvm *kvm, 754 struct kvm_memory_slot *slot) 755 { 756 return 0; 757 } 758 759 static inline void kvm_iommu_unmap_pages(struct kvm *kvm, 760 struct kvm_memory_slot *slot) 761 { 762 } 763 #endif 764 765 static inline void kvm_guest_enter(void) 766 { 767 unsigned long flags; 768 769 BUG_ON(preemptible()); 770 771 local_irq_save(flags); 772 guest_enter(); 773 local_irq_restore(flags); 774 775 /* KVM does not hold any references to rcu protected data when it 776 * switches CPU into a guest mode. In fact switching to a guest mode 777 * is very similar to exiting to userspace from rcu point of view. In 778 * addition CPU may stay in a guest mode for quite a long time (up to 779 * one time slice). Lets treat guest mode as quiescent state, just like 780 * we do with user-mode execution. 781 */ 782 if (!context_tracking_cpu_is_enabled()) 783 rcu_virt_note_context_switch(smp_processor_id()); 784 } 785 786 static inline void kvm_guest_exit(void) 787 { 788 unsigned long flags; 789 790 local_irq_save(flags); 791 guest_exit(); 792 local_irq_restore(flags); 793 } 794 795 /* 796 * search_memslots() and __gfn_to_memslot() are here because they are 797 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c. 798 * gfn_to_memslot() itself isn't here as an inline because that would 799 * bloat other code too much. 800 */ 801 static inline struct kvm_memory_slot * 802 search_memslots(struct kvm_memslots *slots, gfn_t gfn) 803 { 804 int start = 0, end = slots->used_slots; 805 int slot = atomic_read(&slots->lru_slot); 806 struct kvm_memory_slot *memslots = slots->memslots; 807 808 if (gfn >= memslots[slot].base_gfn && 809 gfn < memslots[slot].base_gfn + memslots[slot].npages) 810 return &memslots[slot]; 811 812 while (start < end) { 813 slot = start + (end - start) / 2; 814 815 if (gfn >= memslots[slot].base_gfn) 816 end = slot; 817 else 818 start = slot + 1; 819 } 820 821 if (gfn >= memslots[start].base_gfn && 822 gfn < memslots[start].base_gfn + memslots[start].npages) { 823 atomic_set(&slots->lru_slot, start); 824 return &memslots[start]; 825 } 826 827 return NULL; 828 } 829 830 static inline struct kvm_memory_slot * 831 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn) 832 { 833 return search_memslots(slots, gfn); 834 } 835 836 static inline unsigned long 837 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn) 838 { 839 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE; 840 } 841 842 static inline int memslot_id(struct kvm *kvm, gfn_t gfn) 843 { 844 return gfn_to_memslot(kvm, gfn)->id; 845 } 846 847 static inline gfn_t 848 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot) 849 { 850 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT; 851 852 return slot->base_gfn + gfn_offset; 853 } 854 855 static inline gpa_t gfn_to_gpa(gfn_t gfn) 856 { 857 return (gpa_t)gfn << PAGE_SHIFT; 858 } 859 860 static inline gfn_t gpa_to_gfn(gpa_t gpa) 861 { 862 return (gfn_t)(gpa >> PAGE_SHIFT); 863 } 864 865 static inline hpa_t pfn_to_hpa(pfn_t pfn) 866 { 867 return (hpa_t)pfn << PAGE_SHIFT; 868 } 869 870 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa) 871 { 872 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa)); 873 874 return kvm_is_error_hva(hva); 875 } 876 877 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) 878 { 879 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 880 } 881 882 enum kvm_stat_kind { 883 KVM_STAT_VM, 884 KVM_STAT_VCPU, 885 }; 886 887 struct kvm_stats_debugfs_item { 888 const char *name; 889 int offset; 890 enum kvm_stat_kind kind; 891 struct dentry *dentry; 892 }; 893 extern struct kvm_stats_debugfs_item debugfs_entries[]; 894 extern struct dentry *kvm_debugfs_dir; 895 896 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) 897 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq) 898 { 899 if (unlikely(kvm->mmu_notifier_count)) 900 return 1; 901 /* 902 * Ensure the read of mmu_notifier_count happens before the read 903 * of mmu_notifier_seq. This interacts with the smp_wmb() in 904 * mmu_notifier_invalidate_range_end to make sure that the caller 905 * either sees the old (non-zero) value of mmu_notifier_count or 906 * the new (incremented) value of mmu_notifier_seq. 907 * PowerPC Book3s HV KVM calls this under a per-page lock 908 * rather than under kvm->mmu_lock, for scalability, so 909 * can't rely on kvm->mmu_lock to keep things ordered. 910 */ 911 smp_rmb(); 912 if (kvm->mmu_notifier_seq != mmu_seq) 913 return 1; 914 return 0; 915 } 916 #endif 917 918 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING 919 920 #ifdef CONFIG_S390 921 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that... 922 #else 923 #define KVM_MAX_IRQ_ROUTES 1024 924 #endif 925 926 int kvm_setup_default_irq_routing(struct kvm *kvm); 927 int kvm_set_irq_routing(struct kvm *kvm, 928 const struct kvm_irq_routing_entry *entries, 929 unsigned nr, 930 unsigned flags); 931 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e, 932 const struct kvm_irq_routing_entry *ue); 933 void kvm_free_irq_routing(struct kvm *kvm); 934 935 #else 936 937 static inline void kvm_free_irq_routing(struct kvm *kvm) {} 938 939 #endif 940 941 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi); 942 943 #ifdef CONFIG_HAVE_KVM_EVENTFD 944 945 void kvm_eventfd_init(struct kvm *kvm); 946 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args); 947 948 #ifdef CONFIG_HAVE_KVM_IRQFD 949 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args); 950 void kvm_irqfd_release(struct kvm *kvm); 951 void kvm_irq_routing_update(struct kvm *); 952 #else 953 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args) 954 { 955 return -EINVAL; 956 } 957 958 static inline void kvm_irqfd_release(struct kvm *kvm) {} 959 #endif 960 961 #else 962 963 static inline void kvm_eventfd_init(struct kvm *kvm) {} 964 965 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args) 966 { 967 return -EINVAL; 968 } 969 970 static inline void kvm_irqfd_release(struct kvm *kvm) {} 971 972 #ifdef CONFIG_HAVE_KVM_IRQCHIP 973 static inline void kvm_irq_routing_update(struct kvm *kvm) 974 { 975 } 976 #endif 977 978 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) 979 { 980 return -ENOSYS; 981 } 982 983 #endif /* CONFIG_HAVE_KVM_EVENTFD */ 984 985 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 986 static inline bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu) 987 { 988 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id; 989 } 990 991 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) 992 { 993 return (vcpu->arch.apic_base & MSR_IA32_APICBASE_BSP) != 0; 994 } 995 996 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu); 997 998 #else 999 1000 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; } 1001 1002 #endif 1003 1004 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu) 1005 { 1006 set_bit(req, &vcpu->requests); 1007 } 1008 1009 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu) 1010 { 1011 if (test_bit(req, &vcpu->requests)) { 1012 clear_bit(req, &vcpu->requests); 1013 return true; 1014 } else { 1015 return false; 1016 } 1017 } 1018 1019 extern bool kvm_rebooting; 1020 1021 struct kvm_device { 1022 struct kvm_device_ops *ops; 1023 struct kvm *kvm; 1024 void *private; 1025 struct list_head vm_node; 1026 }; 1027 1028 /* create, destroy, and name are mandatory */ 1029 struct kvm_device_ops { 1030 const char *name; 1031 int (*create)(struct kvm_device *dev, u32 type); 1032 1033 /* 1034 * Destroy is responsible for freeing dev. 1035 * 1036 * Destroy may be called before or after destructors are called 1037 * on emulated I/O regions, depending on whether a reference is 1038 * held by a vcpu or other kvm component that gets destroyed 1039 * after the emulated I/O. 1040 */ 1041 void (*destroy)(struct kvm_device *dev); 1042 1043 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); 1044 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); 1045 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); 1046 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl, 1047 unsigned long arg); 1048 }; 1049 1050 void kvm_device_get(struct kvm_device *dev); 1051 void kvm_device_put(struct kvm_device *dev); 1052 struct kvm_device *kvm_device_from_filp(struct file *filp); 1053 int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type); 1054 void kvm_unregister_device_ops(u32 type); 1055 1056 extern struct kvm_device_ops kvm_mpic_ops; 1057 extern struct kvm_device_ops kvm_xics_ops; 1058 extern struct kvm_device_ops kvm_arm_vgic_v2_ops; 1059 extern struct kvm_device_ops kvm_arm_vgic_v3_ops; 1060 1061 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT 1062 1063 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val) 1064 { 1065 vcpu->spin_loop.in_spin_loop = val; 1066 } 1067 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val) 1068 { 1069 vcpu->spin_loop.dy_eligible = val; 1070 } 1071 1072 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */ 1073 1074 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val) 1075 { 1076 } 1077 1078 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val) 1079 { 1080 } 1081 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */ 1082 #endif 1083 1084