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 #define KVM_REQ_ENABLE_IBS 23 138 #define KVM_REQ_DISABLE_IBS 24 139 #define KVM_REQ_APIC_PAGE_RELOAD 25 140 141 #define KVM_USERSPACE_IRQ_SOURCE_ID 0 142 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1 143 144 extern struct kmem_cache *kvm_vcpu_cache; 145 146 extern spinlock_t kvm_lock; 147 extern struct list_head vm_list; 148 149 struct kvm_io_range { 150 gpa_t addr; 151 int len; 152 struct kvm_io_device *dev; 153 }; 154 155 #define NR_IOBUS_DEVS 1000 156 157 struct kvm_io_bus { 158 int dev_count; 159 int ioeventfd_count; 160 struct kvm_io_range range[]; 161 }; 162 163 enum kvm_bus { 164 KVM_MMIO_BUS, 165 KVM_PIO_BUS, 166 KVM_VIRTIO_CCW_NOTIFY_BUS, 167 KVM_FAST_MMIO_BUS, 168 KVM_NR_BUSES 169 }; 170 171 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, 172 int len, const void *val); 173 int kvm_io_bus_write_cookie(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, 174 int len, const void *val, long cookie); 175 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len, 176 void *val); 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 bool wakeup_all; 193 }; 194 195 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu); 196 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu); 197 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva, 198 struct kvm_arch_async_pf *arch); 199 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu); 200 #endif 201 202 /* 203 * Carry out a gup that requires IO. Allow the mm to relinquish the mmap 204 * semaphore if the filemap/swap has to wait on a page lock. pagep == NULL 205 * controls whether we retry the gup one more time to completion in that case. 206 * Typically this is called after a FAULT_FLAG_RETRY_NOWAIT in the main tdp 207 * handler. 208 */ 209 int kvm_get_user_page_io(struct task_struct *tsk, struct mm_struct *mm, 210 unsigned long addr, bool write_fault, 211 struct page **pagep); 212 213 enum { 214 OUTSIDE_GUEST_MODE, 215 IN_GUEST_MODE, 216 EXITING_GUEST_MODE, 217 READING_SHADOW_PAGE_TABLES, 218 }; 219 220 /* 221 * Sometimes a large or cross-page mmio needs to be broken up into separate 222 * exits for userspace servicing. 223 */ 224 struct kvm_mmio_fragment { 225 gpa_t gpa; 226 void *data; 227 unsigned len; 228 }; 229 230 struct kvm_vcpu { 231 struct kvm *kvm; 232 #ifdef CONFIG_PREEMPT_NOTIFIERS 233 struct preempt_notifier preempt_notifier; 234 #endif 235 int cpu; 236 int vcpu_id; 237 int srcu_idx; 238 int mode; 239 unsigned long requests; 240 unsigned long guest_debug; 241 242 struct mutex mutex; 243 struct kvm_run *run; 244 245 int fpu_active; 246 int guest_fpu_loaded, guest_xcr0_loaded; 247 wait_queue_head_t wq; 248 struct pid *pid; 249 int sigset_active; 250 sigset_t sigset; 251 struct kvm_vcpu_stat stat; 252 253 #ifdef CONFIG_HAS_IOMEM 254 int mmio_needed; 255 int mmio_read_completed; 256 int mmio_is_write; 257 int mmio_cur_fragment; 258 int mmio_nr_fragments; 259 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS]; 260 #endif 261 262 #ifdef CONFIG_KVM_ASYNC_PF 263 struct { 264 u32 queued; 265 struct list_head queue; 266 struct list_head done; 267 spinlock_t lock; 268 } async_pf; 269 #endif 270 271 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT 272 /* 273 * Cpu relax intercept or pause loop exit optimization 274 * in_spin_loop: set when a vcpu does a pause loop exit 275 * or cpu relax intercepted. 276 * dy_eligible: indicates whether vcpu is eligible for directed yield. 277 */ 278 struct { 279 bool in_spin_loop; 280 bool dy_eligible; 281 } spin_loop; 282 #endif 283 bool preempted; 284 struct kvm_vcpu_arch arch; 285 }; 286 287 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu) 288 { 289 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE); 290 } 291 292 /* 293 * Some of the bitops functions do not support too long bitmaps. 294 * This number must be determined not to exceed such limits. 295 */ 296 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1) 297 298 struct kvm_memory_slot { 299 gfn_t base_gfn; 300 unsigned long npages; 301 unsigned long *dirty_bitmap; 302 struct kvm_arch_memory_slot arch; 303 unsigned long userspace_addr; 304 u32 flags; 305 short id; 306 }; 307 308 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot) 309 { 310 return ALIGN(memslot->npages, BITS_PER_LONG) / 8; 311 } 312 313 struct kvm_s390_adapter_int { 314 u64 ind_addr; 315 u64 summary_addr; 316 u64 ind_offset; 317 u32 summary_offset; 318 u32 adapter_id; 319 }; 320 321 struct kvm_kernel_irq_routing_entry { 322 u32 gsi; 323 u32 type; 324 int (*set)(struct kvm_kernel_irq_routing_entry *e, 325 struct kvm *kvm, int irq_source_id, int level, 326 bool line_status); 327 union { 328 struct { 329 unsigned irqchip; 330 unsigned pin; 331 } irqchip; 332 struct msi_msg msi; 333 struct kvm_s390_adapter_int adapter; 334 }; 335 struct hlist_node link; 336 }; 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 struct srcu_struct irq_srcu; 365 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 366 u32 bsp_vcpu_id; 367 #endif 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 struct hlist_head mask_notifier_list; 399 #endif 400 #ifdef CONFIG_HAVE_KVM_IRQFD 401 struct hlist_head irq_ack_notifier_list; 402 #endif 403 404 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) 405 struct mmu_notifier mmu_notifier; 406 unsigned long mmu_notifier_seq; 407 long mmu_notifier_count; 408 #endif 409 long tlbs_dirty; 410 struct list_head devices; 411 }; 412 413 #define kvm_err(fmt, ...) \ 414 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 415 #define kvm_info(fmt, ...) \ 416 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 417 #define kvm_debug(fmt, ...) \ 418 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__) 419 #define kvm_pr_unimpl(fmt, ...) \ 420 pr_err_ratelimited("kvm [%i]: " fmt, \ 421 task_tgid_nr(current), ## __VA_ARGS__) 422 423 /* The guest did something we don't support. */ 424 #define vcpu_unimpl(vcpu, fmt, ...) \ 425 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__) 426 427 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i) 428 { 429 smp_rmb(); 430 return kvm->vcpus[i]; 431 } 432 433 #define kvm_for_each_vcpu(idx, vcpup, kvm) \ 434 for (idx = 0; \ 435 idx < atomic_read(&kvm->online_vcpus) && \ 436 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \ 437 idx++) 438 439 #define kvm_for_each_memslot(memslot, slots) \ 440 for (memslot = &slots->memslots[0]; \ 441 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\ 442 memslot++) 443 444 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 445 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 446 447 int __must_check vcpu_load(struct kvm_vcpu *vcpu); 448 void vcpu_put(struct kvm_vcpu *vcpu); 449 450 #ifdef CONFIG_HAVE_KVM_IRQFD 451 int kvm_irqfd_init(void); 452 void kvm_irqfd_exit(void); 453 #else 454 static inline int kvm_irqfd_init(void) 455 { 456 return 0; 457 } 458 459 static inline void kvm_irqfd_exit(void) 460 { 461 } 462 #endif 463 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, 464 struct module *module); 465 void kvm_exit(void); 466 467 void kvm_get_kvm(struct kvm *kvm); 468 void kvm_put_kvm(struct kvm *kvm); 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 *kvm, struct kvm_memory_slot *free, 512 struct kvm_memory_slot *dont); 513 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, 514 unsigned long npages); 515 void kvm_arch_memslots_updated(struct kvm *kvm); 516 int kvm_arch_prepare_memory_region(struct kvm *kvm, 517 struct kvm_memory_slot *memslot, 518 struct kvm_userspace_memory_region *mem, 519 enum kvm_mr_change change); 520 void kvm_arch_commit_memory_region(struct kvm *kvm, 521 struct kvm_userspace_memory_region *mem, 522 const struct kvm_memory_slot *old, 523 enum kvm_mr_change change); 524 bool kvm_largepages_enabled(void); 525 void kvm_disable_largepages(void); 526 /* flush all memory translations */ 527 void kvm_arch_flush_shadow_all(struct kvm *kvm); 528 /* flush memory translations pointing to 'slot' */ 529 void kvm_arch_flush_shadow_memslot(struct kvm *kvm, 530 struct kvm_memory_slot *slot); 531 532 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages, 533 int nr_pages); 534 535 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 536 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); 537 unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable); 538 unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn); 539 unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, gfn_t gfn, 540 bool *writable); 541 void kvm_release_page_clean(struct page *page); 542 void kvm_release_page_dirty(struct page *page); 543 void kvm_set_page_accessed(struct page *page); 544 545 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn); 546 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async, 547 bool write_fault, bool *writable); 548 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); 549 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault, 550 bool *writable); 551 pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn); 552 pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn); 553 554 void kvm_release_pfn_clean(pfn_t pfn); 555 void kvm_set_pfn_dirty(pfn_t pfn); 556 void kvm_set_pfn_accessed(pfn_t pfn); 557 void kvm_get_pfn(pfn_t pfn); 558 559 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 560 int len); 561 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 562 unsigned long len); 563 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 564 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 565 void *data, unsigned long len); 566 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 567 int offset, int len); 568 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 569 unsigned long len); 570 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 571 void *data, unsigned long len); 572 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, 573 gpa_t gpa, unsigned long len); 574 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 575 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 576 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 577 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 578 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn); 579 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 580 581 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 582 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 583 int kvm_vcpu_yield_to(struct kvm_vcpu *target); 584 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu); 585 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 586 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 587 588 void kvm_flush_remote_tlbs(struct kvm *kvm); 589 void kvm_reload_remote_mmus(struct kvm *kvm); 590 void kvm_make_mclock_inprogress_request(struct kvm *kvm); 591 void kvm_make_scan_ioapic_request(struct kvm *kvm); 592 bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req); 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_vm_ioctl_check_extension(struct kvm *kvm, 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_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, 608 bool line_status); 609 long kvm_arch_vm_ioctl(struct file *filp, 610 unsigned int ioctl, unsigned long arg); 611 612 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 613 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 614 615 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 616 struct kvm_translation *tr); 617 618 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 619 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 620 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 621 struct kvm_sregs *sregs); 622 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 623 struct kvm_sregs *sregs); 624 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 625 struct kvm_mp_state *mp_state); 626 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 627 struct kvm_mp_state *mp_state); 628 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 629 struct kvm_guest_debug *dbg); 630 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 631 632 int kvm_arch_init(void *opaque); 633 void kvm_arch_exit(void); 634 635 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 636 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 637 638 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu); 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); 649 void kvm_arch_hardware_disable(void); 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_kvzalloc(unsigned long size); 657 void kvm_kvfree(const void *addr); 658 659 #ifndef __KVM_HAVE_ARCH_VM_ALLOC 660 static inline struct kvm *kvm_arch_alloc_vm(void) 661 { 662 return kzalloc(sizeof(struct kvm), GFP_KERNEL); 663 } 664 665 static inline void kvm_arch_free_vm(struct kvm *kvm) 666 { 667 kfree(kvm); 668 } 669 #endif 670 671 #ifdef __KVM_HAVE_ARCH_NONCOHERENT_DMA 672 void kvm_arch_register_noncoherent_dma(struct kvm *kvm); 673 void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm); 674 bool kvm_arch_has_noncoherent_dma(struct kvm *kvm); 675 #else 676 static inline void kvm_arch_register_noncoherent_dma(struct kvm *kvm) 677 { 678 } 679 680 static inline void kvm_arch_unregister_noncoherent_dma(struct kvm *kvm) 681 { 682 } 683 684 static inline bool kvm_arch_has_noncoherent_dma(struct kvm *kvm) 685 { 686 return false; 687 } 688 #endif 689 690 static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu) 691 { 692 #ifdef __KVM_HAVE_ARCH_WQP 693 return vcpu->arch.wqp; 694 #else 695 return &vcpu->wq; 696 #endif 697 } 698 699 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type); 700 void kvm_arch_destroy_vm(struct kvm *kvm); 701 void kvm_arch_sync_events(struct kvm *kvm); 702 703 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); 704 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 705 706 bool kvm_is_mmio_pfn(pfn_t pfn); 707 708 struct kvm_irq_ack_notifier { 709 struct hlist_node link; 710 unsigned gsi; 711 void (*irq_acked)(struct kvm_irq_ack_notifier *kian); 712 }; 713 714 struct kvm_assigned_dev_kernel { 715 struct kvm_irq_ack_notifier ack_notifier; 716 struct list_head list; 717 int assigned_dev_id; 718 int host_segnr; 719 int host_busnr; 720 int host_devfn; 721 unsigned int entries_nr; 722 int host_irq; 723 bool host_irq_disabled; 724 bool pci_2_3; 725 struct msix_entry *host_msix_entries; 726 int guest_irq; 727 struct msix_entry *guest_msix_entries; 728 unsigned long irq_requested_type; 729 int irq_source_id; 730 int flags; 731 struct pci_dev *dev; 732 struct kvm *kvm; 733 spinlock_t intx_lock; 734 spinlock_t intx_mask_lock; 735 char irq_name[32]; 736 struct pci_saved_state *pci_saved_state; 737 }; 738 739 struct kvm_irq_mask_notifier { 740 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked); 741 int irq; 742 struct hlist_node link; 743 }; 744 745 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, 746 struct kvm_irq_mask_notifier *kimn); 747 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, 748 struct kvm_irq_mask_notifier *kimn); 749 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin, 750 bool mask); 751 752 int kvm_irq_map_gsi(struct kvm *kvm, 753 struct kvm_kernel_irq_routing_entry *entries, int gsi); 754 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin); 755 756 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level, 757 bool line_status); 758 int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level); 759 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm, 760 int irq_source_id, int level, bool line_status); 761 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin); 762 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin); 763 void kvm_register_irq_ack_notifier(struct kvm *kvm, 764 struct kvm_irq_ack_notifier *kian); 765 void kvm_unregister_irq_ack_notifier(struct kvm *kvm, 766 struct kvm_irq_ack_notifier *kian); 767 int kvm_request_irq_source_id(struct kvm *kvm); 768 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); 769 770 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT 771 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot); 772 void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot); 773 int kvm_iommu_map_guest(struct kvm *kvm); 774 int kvm_iommu_unmap_guest(struct kvm *kvm); 775 int kvm_assign_device(struct kvm *kvm, 776 struct kvm_assigned_dev_kernel *assigned_dev); 777 int kvm_deassign_device(struct kvm *kvm, 778 struct kvm_assigned_dev_kernel *assigned_dev); 779 #else 780 static inline int kvm_iommu_map_pages(struct kvm *kvm, 781 struct kvm_memory_slot *slot) 782 { 783 return 0; 784 } 785 786 static inline void kvm_iommu_unmap_pages(struct kvm *kvm, 787 struct kvm_memory_slot *slot) 788 { 789 } 790 791 static inline int kvm_iommu_unmap_guest(struct kvm *kvm) 792 { 793 return 0; 794 } 795 #endif 796 797 static inline void kvm_guest_enter(void) 798 { 799 unsigned long flags; 800 801 BUG_ON(preemptible()); 802 803 local_irq_save(flags); 804 guest_enter(); 805 local_irq_restore(flags); 806 807 /* KVM does not hold any references to rcu protected data when it 808 * switches CPU into a guest mode. In fact switching to a guest mode 809 * is very similar to exiting to userspace from rcu point of view. In 810 * addition CPU may stay in a guest mode for quite a long time (up to 811 * one time slice). Lets treat guest mode as quiescent state, just like 812 * we do with user-mode execution. 813 */ 814 rcu_virt_note_context_switch(smp_processor_id()); 815 } 816 817 static inline void kvm_guest_exit(void) 818 { 819 unsigned long flags; 820 821 local_irq_save(flags); 822 guest_exit(); 823 local_irq_restore(flags); 824 } 825 826 /* 827 * search_memslots() and __gfn_to_memslot() are here because they are 828 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c. 829 * gfn_to_memslot() itself isn't here as an inline because that would 830 * bloat other code too much. 831 */ 832 static inline struct kvm_memory_slot * 833 search_memslots(struct kvm_memslots *slots, gfn_t gfn) 834 { 835 struct kvm_memory_slot *memslot; 836 837 kvm_for_each_memslot(memslot, slots) 838 if (gfn >= memslot->base_gfn && 839 gfn < memslot->base_gfn + memslot->npages) 840 return memslot; 841 842 return NULL; 843 } 844 845 static inline struct kvm_memory_slot * 846 __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn) 847 { 848 return search_memslots(slots, gfn); 849 } 850 851 static inline unsigned long 852 __gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn) 853 { 854 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE; 855 } 856 857 static inline int memslot_id(struct kvm *kvm, gfn_t gfn) 858 { 859 return gfn_to_memslot(kvm, gfn)->id; 860 } 861 862 static inline gfn_t 863 hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot) 864 { 865 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT; 866 867 return slot->base_gfn + gfn_offset; 868 } 869 870 static inline gpa_t gfn_to_gpa(gfn_t gfn) 871 { 872 return (gpa_t)gfn << PAGE_SHIFT; 873 } 874 875 static inline gfn_t gpa_to_gfn(gpa_t gpa) 876 { 877 return (gfn_t)(gpa >> PAGE_SHIFT); 878 } 879 880 static inline hpa_t pfn_to_hpa(pfn_t pfn) 881 { 882 return (hpa_t)pfn << PAGE_SHIFT; 883 } 884 885 static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa) 886 { 887 unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa)); 888 889 return kvm_is_error_hva(hva); 890 } 891 892 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) 893 { 894 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 895 } 896 897 enum kvm_stat_kind { 898 KVM_STAT_VM, 899 KVM_STAT_VCPU, 900 }; 901 902 struct kvm_stats_debugfs_item { 903 const char *name; 904 int offset; 905 enum kvm_stat_kind kind; 906 struct dentry *dentry; 907 }; 908 extern struct kvm_stats_debugfs_item debugfs_entries[]; 909 extern struct dentry *kvm_debugfs_dir; 910 911 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) 912 static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq) 913 { 914 if (unlikely(kvm->mmu_notifier_count)) 915 return 1; 916 /* 917 * Ensure the read of mmu_notifier_count happens before the read 918 * of mmu_notifier_seq. This interacts with the smp_wmb() in 919 * mmu_notifier_invalidate_range_end to make sure that the caller 920 * either sees the old (non-zero) value of mmu_notifier_count or 921 * the new (incremented) value of mmu_notifier_seq. 922 * PowerPC Book3s HV KVM calls this under a per-page lock 923 * rather than under kvm->mmu_lock, for scalability, so 924 * can't rely on kvm->mmu_lock to keep things ordered. 925 */ 926 smp_rmb(); 927 if (kvm->mmu_notifier_seq != mmu_seq) 928 return 1; 929 return 0; 930 } 931 #endif 932 933 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING 934 935 #ifdef CONFIG_S390 936 #define KVM_MAX_IRQ_ROUTES 4096 //FIXME: we can have more than that... 937 #else 938 #define KVM_MAX_IRQ_ROUTES 1024 939 #endif 940 941 int kvm_setup_default_irq_routing(struct kvm *kvm); 942 int kvm_set_irq_routing(struct kvm *kvm, 943 const struct kvm_irq_routing_entry *entries, 944 unsigned nr, 945 unsigned flags); 946 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e, 947 const struct kvm_irq_routing_entry *ue); 948 void kvm_free_irq_routing(struct kvm *kvm); 949 950 #else 951 952 static inline void kvm_free_irq_routing(struct kvm *kvm) {} 953 954 #endif 955 956 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi); 957 958 #ifdef CONFIG_HAVE_KVM_EVENTFD 959 960 void kvm_eventfd_init(struct kvm *kvm); 961 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args); 962 963 #ifdef CONFIG_HAVE_KVM_IRQFD 964 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args); 965 void kvm_irqfd_release(struct kvm *kvm); 966 void kvm_irq_routing_update(struct kvm *); 967 #else 968 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args) 969 { 970 return -EINVAL; 971 } 972 973 static inline void kvm_irqfd_release(struct kvm *kvm) {} 974 #endif 975 976 #else 977 978 static inline void kvm_eventfd_init(struct kvm *kvm) {} 979 980 static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args) 981 { 982 return -EINVAL; 983 } 984 985 static inline void kvm_irqfd_release(struct kvm *kvm) {} 986 987 #ifdef CONFIG_HAVE_KVM_IRQCHIP 988 static inline void kvm_irq_routing_update(struct kvm *kvm) 989 { 990 } 991 #endif 992 993 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) 994 { 995 return -ENOSYS; 996 } 997 998 #endif /* CONFIG_HAVE_KVM_EVENTFD */ 999 1000 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 1001 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) 1002 { 1003 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id; 1004 } 1005 1006 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu); 1007 1008 #else 1009 1010 static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; } 1011 1012 #endif 1013 1014 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT 1015 1016 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, 1017 unsigned long arg); 1018 1019 void kvm_free_all_assigned_devices(struct kvm *kvm); 1020 1021 #else 1022 1023 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, 1024 unsigned long arg) 1025 { 1026 return -ENOTTY; 1027 } 1028 1029 static inline void kvm_free_all_assigned_devices(struct kvm *kvm) {} 1030 1031 #endif 1032 1033 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu) 1034 { 1035 set_bit(req, &vcpu->requests); 1036 } 1037 1038 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu) 1039 { 1040 if (test_bit(req, &vcpu->requests)) { 1041 clear_bit(req, &vcpu->requests); 1042 return true; 1043 } else { 1044 return false; 1045 } 1046 } 1047 1048 extern bool kvm_rebooting; 1049 1050 struct kvm_device { 1051 struct kvm_device_ops *ops; 1052 struct kvm *kvm; 1053 void *private; 1054 struct list_head vm_node; 1055 }; 1056 1057 /* create, destroy, and name are mandatory */ 1058 struct kvm_device_ops { 1059 const char *name; 1060 int (*create)(struct kvm_device *dev, u32 type); 1061 1062 /* 1063 * Destroy is responsible for freeing dev. 1064 * 1065 * Destroy may be called before or after destructors are called 1066 * on emulated I/O regions, depending on whether a reference is 1067 * held by a vcpu or other kvm component that gets destroyed 1068 * after the emulated I/O. 1069 */ 1070 void (*destroy)(struct kvm_device *dev); 1071 1072 int (*set_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); 1073 int (*get_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); 1074 int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); 1075 long (*ioctl)(struct kvm_device *dev, unsigned int ioctl, 1076 unsigned long arg); 1077 }; 1078 1079 void kvm_device_get(struct kvm_device *dev); 1080 void kvm_device_put(struct kvm_device *dev); 1081 struct kvm_device *kvm_device_from_filp(struct file *filp); 1082 int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type); 1083 void kvm_unregister_device_ops(u32 type); 1084 1085 extern struct kvm_device_ops kvm_mpic_ops; 1086 extern struct kvm_device_ops kvm_xics_ops; 1087 1088 #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT 1089 1090 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val) 1091 { 1092 vcpu->spin_loop.in_spin_loop = val; 1093 } 1094 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val) 1095 { 1096 vcpu->spin_loop.dy_eligible = val; 1097 } 1098 1099 #else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */ 1100 1101 static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val) 1102 { 1103 } 1104 1105 static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val) 1106 { 1107 } 1108 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */ 1109 #endif 1110 1111