1 #ifndef __KVM_HOST_H 2 #define __KVM_HOST_H 3 4 /* 5 * This work is licensed under the terms of the GNU GPL, version 2. See 6 * the COPYING file in the top-level directory. 7 */ 8 9 #include <linux/types.h> 10 #include <linux/hardirq.h> 11 #include <linux/list.h> 12 #include <linux/mutex.h> 13 #include <linux/spinlock.h> 14 #include <linux/signal.h> 15 #include <linux/sched.h> 16 #include <linux/mm.h> 17 #include <linux/preempt.h> 18 #include <linux/marker.h> 19 #include <linux/msi.h> 20 #include <asm/signal.h> 21 22 #include <linux/kvm.h> 23 #include <linux/kvm_para.h> 24 25 #include <linux/kvm_types.h> 26 27 #include <asm/kvm_host.h> 28 29 /* 30 * vcpu->requests bit members 31 */ 32 #define KVM_REQ_TLB_FLUSH 0 33 #define KVM_REQ_MIGRATE_TIMER 1 34 #define KVM_REQ_REPORT_TPR_ACCESS 2 35 #define KVM_REQ_MMU_RELOAD 3 36 #define KVM_REQ_TRIPLE_FAULT 4 37 #define KVM_REQ_PENDING_TIMER 5 38 #define KVM_REQ_UNHALT 6 39 #define KVM_REQ_MMU_SYNC 7 40 #define KVM_REQ_KVMCLOCK_UPDATE 8 41 #define KVM_REQ_KICK 9 42 43 #define KVM_USERSPACE_IRQ_SOURCE_ID 0 44 45 struct kvm; 46 struct kvm_vcpu; 47 extern struct kmem_cache *kvm_vcpu_cache; 48 49 /* 50 * It would be nice to use something smarter than a linear search, TBD... 51 * Thankfully we dont expect many devices to register (famous last words :), 52 * so until then it will suffice. At least its abstracted so we can change 53 * in one place. 54 */ 55 struct kvm_io_bus { 56 int dev_count; 57 #define NR_IOBUS_DEVS 6 58 struct kvm_io_device *devs[NR_IOBUS_DEVS]; 59 }; 60 61 void kvm_io_bus_init(struct kvm_io_bus *bus); 62 void kvm_io_bus_destroy(struct kvm_io_bus *bus); 63 int kvm_io_bus_write(struct kvm_io_bus *bus, gpa_t addr, int len, 64 const void *val); 65 int kvm_io_bus_read(struct kvm_io_bus *bus, gpa_t addr, int len, 66 void *val); 67 int __kvm_io_bus_register_dev(struct kvm_io_bus *bus, 68 struct kvm_io_device *dev); 69 int kvm_io_bus_register_dev(struct kvm *kvm, struct kvm_io_bus *bus, 70 struct kvm_io_device *dev); 71 void __kvm_io_bus_unregister_dev(struct kvm_io_bus *bus, 72 struct kvm_io_device *dev); 73 void kvm_io_bus_unregister_dev(struct kvm *kvm, struct kvm_io_bus *bus, 74 struct kvm_io_device *dev); 75 76 struct kvm_vcpu { 77 struct kvm *kvm; 78 #ifdef CONFIG_PREEMPT_NOTIFIERS 79 struct preempt_notifier preempt_notifier; 80 #endif 81 int vcpu_id; 82 struct mutex mutex; 83 int cpu; 84 struct kvm_run *run; 85 unsigned long requests; 86 unsigned long guest_debug; 87 int fpu_active; 88 int guest_fpu_loaded; 89 wait_queue_head_t wq; 90 int sigset_active; 91 sigset_t sigset; 92 struct kvm_vcpu_stat stat; 93 94 #ifdef CONFIG_HAS_IOMEM 95 int mmio_needed; 96 int mmio_read_completed; 97 int mmio_is_write; 98 int mmio_size; 99 unsigned char mmio_data[8]; 100 gpa_t mmio_phys_addr; 101 #endif 102 103 struct kvm_vcpu_arch arch; 104 }; 105 106 struct kvm_memory_slot { 107 gfn_t base_gfn; 108 unsigned long npages; 109 unsigned long flags; 110 unsigned long *rmap; 111 unsigned long *dirty_bitmap; 112 struct { 113 unsigned long rmap_pde; 114 int write_count; 115 } *lpage_info[KVM_NR_PAGE_SIZES - 1]; 116 unsigned long userspace_addr; 117 int user_alloc; 118 }; 119 120 struct kvm_kernel_irq_routing_entry { 121 u32 gsi; 122 u32 type; 123 int (*set)(struct kvm_kernel_irq_routing_entry *e, 124 struct kvm *kvm, int level); 125 union { 126 struct { 127 unsigned irqchip; 128 unsigned pin; 129 } irqchip; 130 struct msi_msg msi; 131 }; 132 struct list_head link; 133 }; 134 135 struct kvm { 136 spinlock_t mmu_lock; 137 spinlock_t requests_lock; 138 struct rw_semaphore slots_lock; 139 struct mm_struct *mm; /* userspace tied to this vm */ 140 int nmemslots; 141 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS + 142 KVM_PRIVATE_MEM_SLOTS]; 143 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 144 u32 bsp_vcpu_id; 145 struct kvm_vcpu *bsp_vcpu; 146 #endif 147 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; 148 atomic_t online_vcpus; 149 struct list_head vm_list; 150 struct mutex lock; 151 struct kvm_io_bus mmio_bus; 152 struct kvm_io_bus pio_bus; 153 #ifdef CONFIG_HAVE_KVM_EVENTFD 154 struct { 155 spinlock_t lock; 156 struct list_head items; 157 } irqfds; 158 struct list_head ioeventfds; 159 #endif 160 struct kvm_vm_stat stat; 161 struct kvm_arch arch; 162 atomic_t users_count; 163 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET 164 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev; 165 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; 166 #endif 167 168 struct mutex irq_lock; 169 #ifdef CONFIG_HAVE_KVM_IRQCHIP 170 struct list_head irq_routing; /* of kvm_kernel_irq_routing_entry */ 171 struct hlist_head mask_notifier_list; 172 #endif 173 174 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 175 struct mmu_notifier mmu_notifier; 176 unsigned long mmu_notifier_seq; 177 long mmu_notifier_count; 178 #endif 179 }; 180 181 /* The guest did something we don't support. */ 182 #define pr_unimpl(vcpu, fmt, ...) \ 183 do { \ 184 if (printk_ratelimit()) \ 185 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \ 186 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \ 187 } while (0) 188 189 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt) 190 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt) 191 192 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i) 193 { 194 smp_rmb(); 195 return kvm->vcpus[i]; 196 } 197 198 #define kvm_for_each_vcpu(idx, vcpup, kvm) \ 199 for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \ 200 idx < atomic_read(&kvm->online_vcpus) && vcpup; \ 201 vcpup = kvm_get_vcpu(kvm, ++idx)) 202 203 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 204 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 205 206 void vcpu_load(struct kvm_vcpu *vcpu); 207 void vcpu_put(struct kvm_vcpu *vcpu); 208 209 int kvm_init(void *opaque, unsigned int vcpu_size, 210 struct module *module); 211 void kvm_exit(void); 212 213 void kvm_get_kvm(struct kvm *kvm); 214 void kvm_put_kvm(struct kvm *kvm); 215 216 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1) 217 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB) 218 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; } 219 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva); 220 221 extern struct page *bad_page; 222 extern pfn_t bad_pfn; 223 224 int is_error_page(struct page *page); 225 int is_error_pfn(pfn_t pfn); 226 int kvm_is_error_hva(unsigned long addr); 227 int kvm_set_memory_region(struct kvm *kvm, 228 struct kvm_userspace_memory_region *mem, 229 int user_alloc); 230 int __kvm_set_memory_region(struct kvm *kvm, 231 struct kvm_userspace_memory_region *mem, 232 int user_alloc); 233 int kvm_arch_set_memory_region(struct kvm *kvm, 234 struct kvm_userspace_memory_region *mem, 235 struct kvm_memory_slot old, 236 int user_alloc); 237 void kvm_disable_largepages(void); 238 void kvm_arch_flush_shadow(struct kvm *kvm); 239 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn); 240 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 241 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); 242 void kvm_release_page_clean(struct page *page); 243 void kvm_release_page_dirty(struct page *page); 244 void kvm_set_page_dirty(struct page *page); 245 void kvm_set_page_accessed(struct page *page); 246 247 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); 248 void kvm_release_pfn_dirty(pfn_t); 249 void kvm_release_pfn_clean(pfn_t pfn); 250 void kvm_set_pfn_dirty(pfn_t pfn); 251 void kvm_set_pfn_accessed(pfn_t pfn); 252 void kvm_get_pfn(pfn_t pfn); 253 254 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 255 int len); 256 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 257 unsigned long len); 258 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 259 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 260 int offset, int len); 261 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 262 unsigned long len); 263 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 264 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 265 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 266 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 267 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 268 269 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 270 void kvm_resched(struct kvm_vcpu *vcpu); 271 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 272 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 273 void kvm_flush_remote_tlbs(struct kvm *kvm); 274 void kvm_reload_remote_mmus(struct kvm *kvm); 275 276 long kvm_arch_dev_ioctl(struct file *filp, 277 unsigned int ioctl, unsigned long arg); 278 long kvm_arch_vcpu_ioctl(struct file *filp, 279 unsigned int ioctl, unsigned long arg); 280 281 int kvm_dev_ioctl_check_extension(long ext); 282 283 int kvm_get_dirty_log(struct kvm *kvm, 284 struct kvm_dirty_log *log, int *is_dirty); 285 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 286 struct kvm_dirty_log *log); 287 288 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, 289 struct 290 kvm_userspace_memory_region *mem, 291 int user_alloc); 292 long kvm_arch_vm_ioctl(struct file *filp, 293 unsigned int ioctl, unsigned long arg); 294 295 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 296 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 297 298 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 299 struct kvm_translation *tr); 300 301 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 302 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 303 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 304 struct kvm_sregs *sregs); 305 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 306 struct kvm_sregs *sregs); 307 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 308 struct kvm_mp_state *mp_state); 309 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 310 struct kvm_mp_state *mp_state); 311 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 312 struct kvm_guest_debug *dbg); 313 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 314 315 int kvm_arch_init(void *opaque); 316 void kvm_arch_exit(void); 317 318 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 319 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 320 321 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); 322 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 323 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 324 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); 325 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); 326 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); 327 328 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu); 329 void kvm_arch_hardware_enable(void *garbage); 330 void kvm_arch_hardware_disable(void *garbage); 331 int kvm_arch_hardware_setup(void); 332 void kvm_arch_hardware_unsetup(void); 333 void kvm_arch_check_processor_compat(void *rtn); 334 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); 335 336 void kvm_free_physmem(struct kvm *kvm); 337 338 struct kvm *kvm_arch_create_vm(void); 339 void kvm_arch_destroy_vm(struct kvm *kvm); 340 void kvm_free_all_assigned_devices(struct kvm *kvm); 341 void kvm_arch_sync_events(struct kvm *kvm); 342 343 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); 344 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 345 346 int kvm_is_mmio_pfn(pfn_t pfn); 347 348 struct kvm_irq_ack_notifier { 349 struct hlist_node link; 350 unsigned gsi; 351 void (*irq_acked)(struct kvm_irq_ack_notifier *kian); 352 }; 353 354 #define KVM_ASSIGNED_MSIX_PENDING 0x1 355 struct kvm_guest_msix_entry { 356 u32 vector; 357 u16 entry; 358 u16 flags; 359 }; 360 361 struct kvm_assigned_dev_kernel { 362 struct kvm_irq_ack_notifier ack_notifier; 363 struct work_struct interrupt_work; 364 struct list_head list; 365 int assigned_dev_id; 366 int host_busnr; 367 int host_devfn; 368 unsigned int entries_nr; 369 int host_irq; 370 bool host_irq_disabled; 371 struct msix_entry *host_msix_entries; 372 int guest_irq; 373 struct kvm_guest_msix_entry *guest_msix_entries; 374 unsigned long irq_requested_type; 375 int irq_source_id; 376 int flags; 377 struct pci_dev *dev; 378 struct kvm *kvm; 379 spinlock_t assigned_dev_lock; 380 }; 381 382 struct kvm_irq_mask_notifier { 383 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked); 384 int irq; 385 struct hlist_node link; 386 }; 387 388 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, 389 struct kvm_irq_mask_notifier *kimn); 390 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, 391 struct kvm_irq_mask_notifier *kimn); 392 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask); 393 394 int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level); 395 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin); 396 void kvm_register_irq_ack_notifier(struct kvm *kvm, 397 struct kvm_irq_ack_notifier *kian); 398 void kvm_unregister_irq_ack_notifier(struct kvm *kvm, 399 struct kvm_irq_ack_notifier *kian); 400 int kvm_request_irq_source_id(struct kvm *kvm); 401 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); 402 403 /* For vcpu->arch.iommu_flags */ 404 #define KVM_IOMMU_CACHE_COHERENCY 0x1 405 406 #ifdef CONFIG_IOMMU_API 407 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn, 408 unsigned long npages); 409 int kvm_iommu_map_guest(struct kvm *kvm); 410 int kvm_iommu_unmap_guest(struct kvm *kvm); 411 int kvm_assign_device(struct kvm *kvm, 412 struct kvm_assigned_dev_kernel *assigned_dev); 413 int kvm_deassign_device(struct kvm *kvm, 414 struct kvm_assigned_dev_kernel *assigned_dev); 415 #else /* CONFIG_IOMMU_API */ 416 static inline int kvm_iommu_map_pages(struct kvm *kvm, 417 gfn_t base_gfn, 418 unsigned long npages) 419 { 420 return 0; 421 } 422 423 static inline int kvm_iommu_map_guest(struct kvm *kvm) 424 { 425 return -ENODEV; 426 } 427 428 static inline int kvm_iommu_unmap_guest(struct kvm *kvm) 429 { 430 return 0; 431 } 432 433 static inline int kvm_assign_device(struct kvm *kvm, 434 struct kvm_assigned_dev_kernel *assigned_dev) 435 { 436 return 0; 437 } 438 439 static inline int kvm_deassign_device(struct kvm *kvm, 440 struct kvm_assigned_dev_kernel *assigned_dev) 441 { 442 return 0; 443 } 444 #endif /* CONFIG_IOMMU_API */ 445 446 static inline void kvm_guest_enter(void) 447 { 448 account_system_vtime(current); 449 current->flags |= PF_VCPU; 450 } 451 452 static inline void kvm_guest_exit(void) 453 { 454 account_system_vtime(current); 455 current->flags &= ~PF_VCPU; 456 } 457 458 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot) 459 { 460 return slot - kvm->memslots; 461 } 462 463 static inline gpa_t gfn_to_gpa(gfn_t gfn) 464 { 465 return (gpa_t)gfn << PAGE_SHIFT; 466 } 467 468 static inline hpa_t pfn_to_hpa(pfn_t pfn) 469 { 470 return (hpa_t)pfn << PAGE_SHIFT; 471 } 472 473 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) 474 { 475 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 476 } 477 478 enum kvm_stat_kind { 479 KVM_STAT_VM, 480 KVM_STAT_VCPU, 481 }; 482 483 struct kvm_stats_debugfs_item { 484 const char *name; 485 int offset; 486 enum kvm_stat_kind kind; 487 struct dentry *dentry; 488 }; 489 extern struct kvm_stats_debugfs_item debugfs_entries[]; 490 extern struct dentry *kvm_debugfs_dir; 491 492 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 493 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq) 494 { 495 if (unlikely(vcpu->kvm->mmu_notifier_count)) 496 return 1; 497 /* 498 * Both reads happen under the mmu_lock and both values are 499 * modified under mmu_lock, so there's no need of smb_rmb() 500 * here in between, otherwise mmu_notifier_count should be 501 * read before mmu_notifier_seq, see 502 * mmu_notifier_invalidate_range_end write side. 503 */ 504 if (vcpu->kvm->mmu_notifier_seq != mmu_seq) 505 return 1; 506 return 0; 507 } 508 #endif 509 510 #ifdef CONFIG_HAVE_KVM_IRQCHIP 511 512 #define KVM_MAX_IRQ_ROUTES 1024 513 514 int kvm_setup_default_irq_routing(struct kvm *kvm); 515 int kvm_set_irq_routing(struct kvm *kvm, 516 const struct kvm_irq_routing_entry *entries, 517 unsigned nr, 518 unsigned flags); 519 void kvm_free_irq_routing(struct kvm *kvm); 520 521 #else 522 523 static inline void kvm_free_irq_routing(struct kvm *kvm) {} 524 525 #endif 526 527 #ifdef CONFIG_HAVE_KVM_EVENTFD 528 529 void kvm_eventfd_init(struct kvm *kvm); 530 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags); 531 void kvm_irqfd_release(struct kvm *kvm); 532 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args); 533 534 #else 535 536 static inline void kvm_eventfd_init(struct kvm *kvm) {} 537 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags) 538 { 539 return -EINVAL; 540 } 541 542 static inline void kvm_irqfd_release(struct kvm *kvm) {} 543 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) 544 { 545 return -ENOSYS; 546 } 547 548 #endif /* CONFIG_HAVE_KVM_EVENTFD */ 549 550 #ifdef CONFIG_KVM_APIC_ARCHITECTURE 551 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) 552 { 553 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id; 554 } 555 #endif 556 #endif 557