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 41 #define KVM_USERSPACE_IRQ_SOURCE_ID 0 42 43 struct kvm_vcpu; 44 extern struct kmem_cache *kvm_vcpu_cache; 45 46 /* 47 * It would be nice to use something smarter than a linear search, TBD... 48 * Thankfully we dont expect many devices to register (famous last words :), 49 * so until then it will suffice. At least its abstracted so we can change 50 * in one place. 51 */ 52 struct kvm_io_bus { 53 int dev_count; 54 #define NR_IOBUS_DEVS 6 55 struct kvm_io_device *devs[NR_IOBUS_DEVS]; 56 }; 57 58 void kvm_io_bus_init(struct kvm_io_bus *bus); 59 void kvm_io_bus_destroy(struct kvm_io_bus *bus); 60 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, 61 gpa_t addr, int len, int is_write); 62 void kvm_io_bus_register_dev(struct kvm_io_bus *bus, 63 struct kvm_io_device *dev); 64 65 struct kvm_vcpu { 66 struct kvm *kvm; 67 #ifdef CONFIG_PREEMPT_NOTIFIERS 68 struct preempt_notifier preempt_notifier; 69 #endif 70 int vcpu_id; 71 struct mutex mutex; 72 int cpu; 73 struct kvm_run *run; 74 int guest_mode; 75 unsigned long requests; 76 struct kvm_guest_debug guest_debug; 77 int fpu_active; 78 int guest_fpu_loaded; 79 wait_queue_head_t wq; 80 int sigset_active; 81 sigset_t sigset; 82 struct kvm_vcpu_stat stat; 83 84 #ifdef CONFIG_HAS_IOMEM 85 int mmio_needed; 86 int mmio_read_completed; 87 int mmio_is_write; 88 int mmio_size; 89 unsigned char mmio_data[8]; 90 gpa_t mmio_phys_addr; 91 #endif 92 93 struct kvm_vcpu_arch arch; 94 }; 95 96 struct kvm_memory_slot { 97 gfn_t base_gfn; 98 unsigned long npages; 99 unsigned long flags; 100 unsigned long *rmap; 101 unsigned long *dirty_bitmap; 102 struct { 103 unsigned long rmap_pde; 104 int write_count; 105 } *lpage_info; 106 unsigned long userspace_addr; 107 int user_alloc; 108 }; 109 110 struct kvm { 111 struct mutex lock; /* protects the vcpus array and APIC accesses */ 112 spinlock_t mmu_lock; 113 struct rw_semaphore slots_lock; 114 struct mm_struct *mm; /* userspace tied to this vm */ 115 int nmemslots; 116 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS + 117 KVM_PRIVATE_MEM_SLOTS]; 118 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; 119 struct list_head vm_list; 120 struct kvm_io_bus mmio_bus; 121 struct kvm_io_bus pio_bus; 122 struct kvm_vm_stat stat; 123 struct kvm_arch arch; 124 atomic_t users_count; 125 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET 126 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev; 127 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; 128 #endif 129 130 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 131 struct mmu_notifier mmu_notifier; 132 unsigned long mmu_notifier_seq; 133 long mmu_notifier_count; 134 #endif 135 }; 136 137 /* The guest did something we don't support. */ 138 #define pr_unimpl(vcpu, fmt, ...) \ 139 do { \ 140 if (printk_ratelimit()) \ 141 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \ 142 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \ 143 } while (0) 144 145 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt) 146 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt) 147 148 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 149 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 150 151 void vcpu_load(struct kvm_vcpu *vcpu); 152 void vcpu_put(struct kvm_vcpu *vcpu); 153 154 int kvm_init(void *opaque, unsigned int vcpu_size, 155 struct module *module); 156 void kvm_exit(void); 157 158 void kvm_get_kvm(struct kvm *kvm); 159 void kvm_put_kvm(struct kvm *kvm); 160 161 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1) 162 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB) 163 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; } 164 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva); 165 166 extern struct page *bad_page; 167 extern pfn_t bad_pfn; 168 169 int is_error_page(struct page *page); 170 int is_error_pfn(pfn_t pfn); 171 int kvm_is_error_hva(unsigned long addr); 172 int kvm_set_memory_region(struct kvm *kvm, 173 struct kvm_userspace_memory_region *mem, 174 int user_alloc); 175 int __kvm_set_memory_region(struct kvm *kvm, 176 struct kvm_userspace_memory_region *mem, 177 int user_alloc); 178 int kvm_arch_set_memory_region(struct kvm *kvm, 179 struct kvm_userspace_memory_region *mem, 180 struct kvm_memory_slot old, 181 int user_alloc); 182 void kvm_arch_flush_shadow(struct kvm *kvm); 183 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn); 184 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 185 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); 186 void kvm_release_page_clean(struct page *page); 187 void kvm_release_page_dirty(struct page *page); 188 void kvm_set_page_dirty(struct page *page); 189 void kvm_set_page_accessed(struct page *page); 190 191 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); 192 void kvm_release_pfn_dirty(pfn_t); 193 void kvm_release_pfn_clean(pfn_t pfn); 194 void kvm_set_pfn_dirty(pfn_t pfn); 195 void kvm_set_pfn_accessed(pfn_t pfn); 196 void kvm_get_pfn(pfn_t pfn); 197 198 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 199 int len); 200 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 201 unsigned long len); 202 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 203 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 204 int offset, int len); 205 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 206 unsigned long len); 207 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 208 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 209 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 210 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 211 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 212 213 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 214 void kvm_resched(struct kvm_vcpu *vcpu); 215 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 216 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 217 void kvm_flush_remote_tlbs(struct kvm *kvm); 218 void kvm_reload_remote_mmus(struct kvm *kvm); 219 220 long kvm_arch_dev_ioctl(struct file *filp, 221 unsigned int ioctl, unsigned long arg); 222 long kvm_arch_vcpu_ioctl(struct file *filp, 223 unsigned int ioctl, unsigned long arg); 224 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 225 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 226 227 int kvm_dev_ioctl_check_extension(long ext); 228 229 int kvm_get_dirty_log(struct kvm *kvm, 230 struct kvm_dirty_log *log, int *is_dirty); 231 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 232 struct kvm_dirty_log *log); 233 234 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, 235 struct 236 kvm_userspace_memory_region *mem, 237 int user_alloc); 238 long kvm_arch_vm_ioctl(struct file *filp, 239 unsigned int ioctl, unsigned long arg); 240 void kvm_arch_destroy_vm(struct kvm *kvm); 241 242 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 243 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 244 245 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 246 struct kvm_translation *tr); 247 248 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 249 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 250 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 251 struct kvm_sregs *sregs); 252 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 253 struct kvm_sregs *sregs); 254 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 255 struct kvm_mp_state *mp_state); 256 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 257 struct kvm_mp_state *mp_state); 258 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, 259 struct kvm_debug_guest *dbg); 260 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 261 262 int kvm_arch_init(void *opaque); 263 void kvm_arch_exit(void); 264 265 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 266 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 267 268 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); 269 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 270 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 271 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); 272 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); 273 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); 274 275 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu); 276 void kvm_arch_hardware_enable(void *garbage); 277 void kvm_arch_hardware_disable(void *garbage); 278 int kvm_arch_hardware_setup(void); 279 void kvm_arch_hardware_unsetup(void); 280 void kvm_arch_check_processor_compat(void *rtn); 281 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); 282 283 void kvm_free_physmem(struct kvm *kvm); 284 285 struct kvm *kvm_arch_create_vm(void); 286 void kvm_arch_destroy_vm(struct kvm *kvm); 287 void kvm_free_all_assigned_devices(struct kvm *kvm); 288 289 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 290 int kvm_cpu_has_interrupt(struct kvm_vcpu *v); 291 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); 292 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 293 294 int kvm_is_mmio_pfn(pfn_t pfn); 295 296 struct kvm_irq_ack_notifier { 297 struct hlist_node link; 298 unsigned gsi; 299 void (*irq_acked)(struct kvm_irq_ack_notifier *kian); 300 }; 301 302 struct kvm_assigned_dev_kernel { 303 struct kvm_irq_ack_notifier ack_notifier; 304 struct work_struct interrupt_work; 305 struct list_head list; 306 int assigned_dev_id; 307 int host_busnr; 308 int host_devfn; 309 int host_irq; 310 bool host_irq_disabled; 311 int guest_irq; 312 struct msi_msg guest_msi; 313 #define KVM_ASSIGNED_DEV_GUEST_INTX (1 << 0) 314 #define KVM_ASSIGNED_DEV_GUEST_MSI (1 << 1) 315 #define KVM_ASSIGNED_DEV_HOST_INTX (1 << 8) 316 #define KVM_ASSIGNED_DEV_HOST_MSI (1 << 9) 317 unsigned long irq_requested_type; 318 int irq_source_id; 319 int flags; 320 struct pci_dev *dev; 321 struct kvm *kvm; 322 }; 323 void kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level); 324 void kvm_notify_acked_irq(struct kvm *kvm, unsigned gsi); 325 void kvm_register_irq_ack_notifier(struct kvm *kvm, 326 struct kvm_irq_ack_notifier *kian); 327 void kvm_unregister_irq_ack_notifier(struct kvm_irq_ack_notifier *kian); 328 int kvm_request_irq_source_id(struct kvm *kvm); 329 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); 330 331 #ifdef CONFIG_IOMMU_API 332 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn, 333 unsigned long npages); 334 int kvm_iommu_map_guest(struct kvm *kvm); 335 int kvm_iommu_unmap_guest(struct kvm *kvm); 336 int kvm_assign_device(struct kvm *kvm, 337 struct kvm_assigned_dev_kernel *assigned_dev); 338 int kvm_deassign_device(struct kvm *kvm, 339 struct kvm_assigned_dev_kernel *assigned_dev); 340 #else /* CONFIG_IOMMU_API */ 341 static inline int kvm_iommu_map_pages(struct kvm *kvm, 342 gfn_t base_gfn, 343 unsigned long npages) 344 { 345 return 0; 346 } 347 348 static inline int kvm_iommu_map_guest(struct kvm *kvm) 349 { 350 return -ENODEV; 351 } 352 353 static inline int kvm_iommu_unmap_guest(struct kvm *kvm) 354 { 355 return 0; 356 } 357 358 static inline int kvm_assign_device(struct kvm *kvm, 359 struct kvm_assigned_dev_kernel *assigned_dev) 360 { 361 return 0; 362 } 363 364 static inline int kvm_deassign_device(struct kvm *kvm, 365 struct kvm_assigned_dev_kernel *assigned_dev) 366 { 367 return 0; 368 } 369 #endif /* CONFIG_IOMMU_API */ 370 371 static inline void kvm_guest_enter(void) 372 { 373 account_system_vtime(current); 374 current->flags |= PF_VCPU; 375 } 376 377 static inline void kvm_guest_exit(void) 378 { 379 account_system_vtime(current); 380 current->flags &= ~PF_VCPU; 381 } 382 383 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot) 384 { 385 return slot - kvm->memslots; 386 } 387 388 static inline gpa_t gfn_to_gpa(gfn_t gfn) 389 { 390 return (gpa_t)gfn << PAGE_SHIFT; 391 } 392 393 static inline hpa_t pfn_to_hpa(pfn_t pfn) 394 { 395 return (hpa_t)pfn << PAGE_SHIFT; 396 } 397 398 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) 399 { 400 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 401 } 402 403 enum kvm_stat_kind { 404 KVM_STAT_VM, 405 KVM_STAT_VCPU, 406 }; 407 408 struct kvm_stats_debugfs_item { 409 const char *name; 410 int offset; 411 enum kvm_stat_kind kind; 412 struct dentry *dentry; 413 }; 414 extern struct kvm_stats_debugfs_item debugfs_entries[]; 415 extern struct dentry *kvm_debugfs_dir; 416 417 #define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \ 418 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 419 vcpu, 5, d1, d2, d3, d4, d5) 420 #define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \ 421 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 422 vcpu, 4, d1, d2, d3, d4, 0) 423 #define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \ 424 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 425 vcpu, 3, d1, d2, d3, 0, 0) 426 #define KVMTRACE_2D(evt, vcpu, d1, d2, name) \ 427 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 428 vcpu, 2, d1, d2, 0, 0, 0) 429 #define KVMTRACE_1D(evt, vcpu, d1, name) \ 430 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 431 vcpu, 1, d1, 0, 0, 0, 0) 432 #define KVMTRACE_0D(evt, vcpu, name) \ 433 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 434 vcpu, 0, 0, 0, 0, 0, 0) 435 436 #ifdef CONFIG_KVM_TRACE 437 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg); 438 void kvm_trace_cleanup(void); 439 #else 440 static inline 441 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg) 442 { 443 return -EINVAL; 444 } 445 #define kvm_trace_cleanup() ((void)0) 446 #endif 447 448 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 449 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq) 450 { 451 if (unlikely(vcpu->kvm->mmu_notifier_count)) 452 return 1; 453 /* 454 * Both reads happen under the mmu_lock and both values are 455 * modified under mmu_lock, so there's no need of smb_rmb() 456 * here in between, otherwise mmu_notifier_count should be 457 * read before mmu_notifier_seq, see 458 * mmu_notifier_invalidate_range_end write side. 459 */ 460 if (vcpu->kvm->mmu_notifier_seq != mmu_seq) 461 return 1; 462 return 0; 463 } 464 #endif 465 466 #endif 467