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_vcpu; 46 extern struct kmem_cache *kvm_vcpu_cache; 47 48 /* 49 * It would be nice to use something smarter than a linear search, TBD... 50 * Thankfully we dont expect many devices to register (famous last words :), 51 * so until then it will suffice. At least its abstracted so we can change 52 * in one place. 53 */ 54 struct kvm_io_bus { 55 int dev_count; 56 #define NR_IOBUS_DEVS 6 57 struct kvm_io_device *devs[NR_IOBUS_DEVS]; 58 }; 59 60 void kvm_io_bus_init(struct kvm_io_bus *bus); 61 void kvm_io_bus_destroy(struct kvm_io_bus *bus); 62 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, 63 gpa_t addr, int len, int is_write); 64 void kvm_io_bus_register_dev(struct kvm_io_bus *bus, 65 struct kvm_io_device *dev); 66 67 struct kvm_vcpu { 68 struct kvm *kvm; 69 #ifdef CONFIG_PREEMPT_NOTIFIERS 70 struct preempt_notifier preempt_notifier; 71 #endif 72 int vcpu_id; 73 struct mutex mutex; 74 int cpu; 75 struct kvm_run *run; 76 unsigned long requests; 77 unsigned long guest_debug; 78 int fpu_active; 79 int guest_fpu_loaded; 80 wait_queue_head_t wq; 81 int sigset_active; 82 sigset_t sigset; 83 struct kvm_vcpu_stat stat; 84 85 #ifdef CONFIG_HAS_IOMEM 86 int mmio_needed; 87 int mmio_read_completed; 88 int mmio_is_write; 89 int mmio_size; 90 unsigned char mmio_data[8]; 91 gpa_t mmio_phys_addr; 92 #endif 93 94 struct kvm_vcpu_arch arch; 95 }; 96 97 struct kvm_memory_slot { 98 gfn_t base_gfn; 99 unsigned long npages; 100 unsigned long flags; 101 unsigned long *rmap; 102 unsigned long *dirty_bitmap; 103 struct { 104 unsigned long rmap_pde; 105 int write_count; 106 } *lpage_info; 107 unsigned long userspace_addr; 108 int user_alloc; 109 }; 110 111 struct kvm_kernel_irq_routing_entry { 112 u32 gsi; 113 u32 type; 114 int (*set)(struct kvm_kernel_irq_routing_entry *e, 115 struct kvm *kvm, int level); 116 union { 117 struct { 118 unsigned irqchip; 119 unsigned pin; 120 } irqchip; 121 struct msi_msg msi; 122 }; 123 struct list_head link; 124 }; 125 126 struct kvm { 127 struct mutex lock; /* protects the vcpus array and APIC accesses */ 128 spinlock_t mmu_lock; 129 spinlock_t requests_lock; 130 struct rw_semaphore slots_lock; 131 struct mm_struct *mm; /* userspace tied to this vm */ 132 int nmemslots; 133 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS + 134 KVM_PRIVATE_MEM_SLOTS]; 135 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; 136 struct list_head vm_list; 137 struct kvm_io_bus mmio_bus; 138 struct kvm_io_bus pio_bus; 139 struct kvm_vm_stat stat; 140 struct kvm_arch arch; 141 atomic_t users_count; 142 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET 143 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev; 144 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; 145 #endif 146 147 #ifdef CONFIG_HAVE_KVM_IRQCHIP 148 struct list_head irq_routing; /* of kvm_kernel_irq_routing_entry */ 149 struct hlist_head mask_notifier_list; 150 #endif 151 152 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 153 struct mmu_notifier mmu_notifier; 154 unsigned long mmu_notifier_seq; 155 long mmu_notifier_count; 156 #endif 157 }; 158 159 /* The guest did something we don't support. */ 160 #define pr_unimpl(vcpu, fmt, ...) \ 161 do { \ 162 if (printk_ratelimit()) \ 163 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \ 164 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \ 165 } while (0) 166 167 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt) 168 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt) 169 170 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 171 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 172 173 void vcpu_load(struct kvm_vcpu *vcpu); 174 void vcpu_put(struct kvm_vcpu *vcpu); 175 176 int kvm_init(void *opaque, unsigned int vcpu_size, 177 struct module *module); 178 void kvm_exit(void); 179 180 void kvm_get_kvm(struct kvm *kvm); 181 void kvm_put_kvm(struct kvm *kvm); 182 183 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1) 184 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB) 185 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; } 186 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva); 187 188 extern struct page *bad_page; 189 extern pfn_t bad_pfn; 190 191 int is_error_page(struct page *page); 192 int is_error_pfn(pfn_t pfn); 193 int kvm_is_error_hva(unsigned long addr); 194 int kvm_set_memory_region(struct kvm *kvm, 195 struct kvm_userspace_memory_region *mem, 196 int user_alloc); 197 int __kvm_set_memory_region(struct kvm *kvm, 198 struct kvm_userspace_memory_region *mem, 199 int user_alloc); 200 int kvm_arch_set_memory_region(struct kvm *kvm, 201 struct kvm_userspace_memory_region *mem, 202 struct kvm_memory_slot old, 203 int user_alloc); 204 void kvm_arch_flush_shadow(struct kvm *kvm); 205 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn); 206 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 207 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); 208 void kvm_release_page_clean(struct page *page); 209 void kvm_release_page_dirty(struct page *page); 210 void kvm_set_page_dirty(struct page *page); 211 void kvm_set_page_accessed(struct page *page); 212 213 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); 214 void kvm_release_pfn_dirty(pfn_t); 215 void kvm_release_pfn_clean(pfn_t pfn); 216 void kvm_set_pfn_dirty(pfn_t pfn); 217 void kvm_set_pfn_accessed(pfn_t pfn); 218 void kvm_get_pfn(pfn_t pfn); 219 220 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 221 int len); 222 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 223 unsigned long len); 224 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 225 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 226 int offset, int len); 227 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 228 unsigned long len); 229 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 230 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 231 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 232 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 233 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 234 235 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 236 void kvm_resched(struct kvm_vcpu *vcpu); 237 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 238 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 239 void kvm_flush_remote_tlbs(struct kvm *kvm); 240 void kvm_reload_remote_mmus(struct kvm *kvm); 241 242 long kvm_arch_dev_ioctl(struct file *filp, 243 unsigned int ioctl, unsigned long arg); 244 long kvm_arch_vcpu_ioctl(struct file *filp, 245 unsigned int ioctl, unsigned long arg); 246 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 247 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 248 249 int kvm_dev_ioctl_check_extension(long ext); 250 251 int kvm_get_dirty_log(struct kvm *kvm, 252 struct kvm_dirty_log *log, int *is_dirty); 253 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 254 struct kvm_dirty_log *log); 255 256 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, 257 struct 258 kvm_userspace_memory_region *mem, 259 int user_alloc); 260 long kvm_arch_vm_ioctl(struct file *filp, 261 unsigned int ioctl, unsigned long arg); 262 263 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 264 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 265 266 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 267 struct kvm_translation *tr); 268 269 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 270 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 271 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 272 struct kvm_sregs *sregs); 273 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 274 struct kvm_sregs *sregs); 275 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 276 struct kvm_mp_state *mp_state); 277 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 278 struct kvm_mp_state *mp_state); 279 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, 280 struct kvm_guest_debug *dbg); 281 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 282 283 int kvm_arch_init(void *opaque); 284 void kvm_arch_exit(void); 285 286 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 287 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 288 289 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); 290 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 291 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 292 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); 293 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); 294 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); 295 296 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu); 297 void kvm_arch_hardware_enable(void *garbage); 298 void kvm_arch_hardware_disable(void *garbage); 299 int kvm_arch_hardware_setup(void); 300 void kvm_arch_hardware_unsetup(void); 301 void kvm_arch_check_processor_compat(void *rtn); 302 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); 303 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu); 304 305 void kvm_free_physmem(struct kvm *kvm); 306 307 struct kvm *kvm_arch_create_vm(void); 308 void kvm_arch_destroy_vm(struct kvm *kvm); 309 void kvm_free_all_assigned_devices(struct kvm *kvm); 310 void kvm_arch_sync_events(struct kvm *kvm); 311 312 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 313 int kvm_cpu_has_interrupt(struct kvm_vcpu *v); 314 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); 315 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 316 317 int kvm_is_mmio_pfn(pfn_t pfn); 318 319 struct kvm_irq_ack_notifier { 320 struct hlist_node link; 321 unsigned gsi; 322 void (*irq_acked)(struct kvm_irq_ack_notifier *kian); 323 }; 324 325 #define KVM_ASSIGNED_MSIX_PENDING 0x1 326 struct kvm_guest_msix_entry { 327 u32 vector; 328 u16 entry; 329 u16 flags; 330 }; 331 332 struct kvm_assigned_dev_kernel { 333 struct kvm_irq_ack_notifier ack_notifier; 334 struct work_struct interrupt_work; 335 struct list_head list; 336 int assigned_dev_id; 337 int host_busnr; 338 int host_devfn; 339 unsigned int entries_nr; 340 int host_irq; 341 bool host_irq_disabled; 342 struct msix_entry *host_msix_entries; 343 int guest_irq; 344 struct kvm_guest_msix_entry *guest_msix_entries; 345 unsigned long irq_requested_type; 346 int irq_source_id; 347 int flags; 348 struct pci_dev *dev; 349 struct kvm *kvm; 350 spinlock_t assigned_dev_lock; 351 }; 352 353 struct kvm_irq_mask_notifier { 354 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked); 355 int irq; 356 struct hlist_node link; 357 }; 358 359 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, 360 struct kvm_irq_mask_notifier *kimn); 361 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, 362 struct kvm_irq_mask_notifier *kimn); 363 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask); 364 365 int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level); 366 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin); 367 void kvm_register_irq_ack_notifier(struct kvm *kvm, 368 struct kvm_irq_ack_notifier *kian); 369 void kvm_unregister_irq_ack_notifier(struct kvm_irq_ack_notifier *kian); 370 int kvm_request_irq_source_id(struct kvm *kvm); 371 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); 372 373 /* For vcpu->arch.iommu_flags */ 374 #define KVM_IOMMU_CACHE_COHERENCY 0x1 375 376 #ifdef CONFIG_IOMMU_API 377 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn, 378 unsigned long npages); 379 int kvm_iommu_map_guest(struct kvm *kvm); 380 int kvm_iommu_unmap_guest(struct kvm *kvm); 381 int kvm_assign_device(struct kvm *kvm, 382 struct kvm_assigned_dev_kernel *assigned_dev); 383 int kvm_deassign_device(struct kvm *kvm, 384 struct kvm_assigned_dev_kernel *assigned_dev); 385 #else /* CONFIG_IOMMU_API */ 386 static inline int kvm_iommu_map_pages(struct kvm *kvm, 387 gfn_t base_gfn, 388 unsigned long npages) 389 { 390 return 0; 391 } 392 393 static inline int kvm_iommu_map_guest(struct kvm *kvm) 394 { 395 return -ENODEV; 396 } 397 398 static inline int kvm_iommu_unmap_guest(struct kvm *kvm) 399 { 400 return 0; 401 } 402 403 static inline int kvm_assign_device(struct kvm *kvm, 404 struct kvm_assigned_dev_kernel *assigned_dev) 405 { 406 return 0; 407 } 408 409 static inline int kvm_deassign_device(struct kvm *kvm, 410 struct kvm_assigned_dev_kernel *assigned_dev) 411 { 412 return 0; 413 } 414 #endif /* CONFIG_IOMMU_API */ 415 416 static inline void kvm_guest_enter(void) 417 { 418 account_system_vtime(current); 419 current->flags |= PF_VCPU; 420 } 421 422 static inline void kvm_guest_exit(void) 423 { 424 account_system_vtime(current); 425 current->flags &= ~PF_VCPU; 426 } 427 428 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot) 429 { 430 return slot - kvm->memslots; 431 } 432 433 static inline gpa_t gfn_to_gpa(gfn_t gfn) 434 { 435 return (gpa_t)gfn << PAGE_SHIFT; 436 } 437 438 static inline hpa_t pfn_to_hpa(pfn_t pfn) 439 { 440 return (hpa_t)pfn << PAGE_SHIFT; 441 } 442 443 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) 444 { 445 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 446 } 447 448 enum kvm_stat_kind { 449 KVM_STAT_VM, 450 KVM_STAT_VCPU, 451 }; 452 453 struct kvm_stats_debugfs_item { 454 const char *name; 455 int offset; 456 enum kvm_stat_kind kind; 457 struct dentry *dentry; 458 }; 459 extern struct kvm_stats_debugfs_item debugfs_entries[]; 460 extern struct dentry *kvm_debugfs_dir; 461 462 #define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \ 463 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 464 vcpu, 5, d1, d2, d3, d4, d5) 465 #define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \ 466 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 467 vcpu, 4, d1, d2, d3, d4, 0) 468 #define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \ 469 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 470 vcpu, 3, d1, d2, d3, 0, 0) 471 #define KVMTRACE_2D(evt, vcpu, d1, d2, name) \ 472 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 473 vcpu, 2, d1, d2, 0, 0, 0) 474 #define KVMTRACE_1D(evt, vcpu, d1, name) \ 475 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 476 vcpu, 1, d1, 0, 0, 0, 0) 477 #define KVMTRACE_0D(evt, vcpu, name) \ 478 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 479 vcpu, 0, 0, 0, 0, 0, 0) 480 481 #ifdef CONFIG_KVM_TRACE 482 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg); 483 void kvm_trace_cleanup(void); 484 #else 485 static inline 486 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg) 487 { 488 return -EINVAL; 489 } 490 #define kvm_trace_cleanup() ((void)0) 491 #endif 492 493 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 494 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq) 495 { 496 if (unlikely(vcpu->kvm->mmu_notifier_count)) 497 return 1; 498 /* 499 * Both reads happen under the mmu_lock and both values are 500 * modified under mmu_lock, so there's no need of smb_rmb() 501 * here in between, otherwise mmu_notifier_count should be 502 * read before mmu_notifier_seq, see 503 * mmu_notifier_invalidate_range_end write side. 504 */ 505 if (vcpu->kvm->mmu_notifier_seq != mmu_seq) 506 return 1; 507 return 0; 508 } 509 #endif 510 511 #ifdef CONFIG_HAVE_KVM_IRQCHIP 512 513 #define KVM_MAX_IRQ_ROUTES 1024 514 515 int kvm_setup_default_irq_routing(struct kvm *kvm); 516 int kvm_set_irq_routing(struct kvm *kvm, 517 const struct kvm_irq_routing_entry *entries, 518 unsigned nr, 519 unsigned flags); 520 void kvm_free_irq_routing(struct kvm *kvm); 521 522 #else 523 524 static inline void kvm_free_irq_routing(struct kvm *kvm) {} 525 526 #endif 527 528 #endif 529