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 <asm/signal.h> 20 21 #include <linux/kvm.h> 22 #include <linux/kvm_para.h> 23 24 #include <linux/kvm_types.h> 25 26 #include <asm/kvm_host.h> 27 28 /* 29 * vcpu->requests bit members 30 */ 31 #define KVM_REQ_TLB_FLUSH 0 32 #define KVM_REQ_MIGRATE_TIMER 1 33 #define KVM_REQ_REPORT_TPR_ACCESS 2 34 #define KVM_REQ_MMU_RELOAD 3 35 #define KVM_REQ_TRIPLE_FAULT 4 36 #define KVM_REQ_PENDING_TIMER 5 37 #define KVM_REQ_UNHALT 6 38 #define KVM_REQ_MMU_SYNC 7 39 40 struct kvm_vcpu; 41 extern struct kmem_cache *kvm_vcpu_cache; 42 43 /* 44 * It would be nice to use something smarter than a linear search, TBD... 45 * Thankfully we dont expect many devices to register (famous last words :), 46 * so until then it will suffice. At least its abstracted so we can change 47 * in one place. 48 */ 49 struct kvm_io_bus { 50 int dev_count; 51 #define NR_IOBUS_DEVS 6 52 struct kvm_io_device *devs[NR_IOBUS_DEVS]; 53 }; 54 55 void kvm_io_bus_init(struct kvm_io_bus *bus); 56 void kvm_io_bus_destroy(struct kvm_io_bus *bus); 57 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, 58 gpa_t addr, int len, int is_write); 59 void kvm_io_bus_register_dev(struct kvm_io_bus *bus, 60 struct kvm_io_device *dev); 61 62 struct kvm_vcpu { 63 struct kvm *kvm; 64 #ifdef CONFIG_PREEMPT_NOTIFIERS 65 struct preempt_notifier preempt_notifier; 66 #endif 67 int vcpu_id; 68 struct mutex mutex; 69 int cpu; 70 struct kvm_run *run; 71 int guest_mode; 72 unsigned long requests; 73 struct kvm_guest_debug guest_debug; 74 int fpu_active; 75 int guest_fpu_loaded; 76 wait_queue_head_t wq; 77 int sigset_active; 78 sigset_t sigset; 79 struct kvm_vcpu_stat stat; 80 81 #ifdef CONFIG_HAS_IOMEM 82 int mmio_needed; 83 int mmio_read_completed; 84 int mmio_is_write; 85 int mmio_size; 86 unsigned char mmio_data[8]; 87 gpa_t mmio_phys_addr; 88 #endif 89 90 struct kvm_vcpu_arch arch; 91 }; 92 93 struct kvm_memory_slot { 94 gfn_t base_gfn; 95 unsigned long npages; 96 unsigned long flags; 97 unsigned long *rmap; 98 unsigned long *dirty_bitmap; 99 struct { 100 unsigned long rmap_pde; 101 int write_count; 102 } *lpage_info; 103 unsigned long userspace_addr; 104 int user_alloc; 105 }; 106 107 struct kvm { 108 struct mutex lock; /* protects the vcpus array and APIC accesses */ 109 spinlock_t mmu_lock; 110 struct rw_semaphore slots_lock; 111 struct mm_struct *mm; /* userspace tied to this vm */ 112 int nmemslots; 113 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS + 114 KVM_PRIVATE_MEM_SLOTS]; 115 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; 116 struct list_head vm_list; 117 struct kvm_io_bus mmio_bus; 118 struct kvm_io_bus pio_bus; 119 struct kvm_vm_stat stat; 120 struct kvm_arch arch; 121 atomic_t users_count; 122 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET 123 struct kvm_coalesced_mmio_dev *coalesced_mmio_dev; 124 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; 125 #endif 126 127 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 128 struct mmu_notifier mmu_notifier; 129 unsigned long mmu_notifier_seq; 130 long mmu_notifier_count; 131 #endif 132 }; 133 134 /* The guest did something we don't support. */ 135 #define pr_unimpl(vcpu, fmt, ...) \ 136 do { \ 137 if (printk_ratelimit()) \ 138 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \ 139 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \ 140 } while (0) 141 142 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt) 143 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt) 144 145 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); 146 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); 147 148 void vcpu_load(struct kvm_vcpu *vcpu); 149 void vcpu_put(struct kvm_vcpu *vcpu); 150 151 int kvm_init(void *opaque, unsigned int vcpu_size, 152 struct module *module); 153 void kvm_exit(void); 154 155 void kvm_get_kvm(struct kvm *kvm); 156 void kvm_put_kvm(struct kvm *kvm); 157 158 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1) 159 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB) 160 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; } 161 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva); 162 163 extern struct page *bad_page; 164 extern pfn_t bad_pfn; 165 166 int is_error_page(struct page *page); 167 int is_error_pfn(pfn_t pfn); 168 int kvm_is_error_hva(unsigned long addr); 169 int kvm_set_memory_region(struct kvm *kvm, 170 struct kvm_userspace_memory_region *mem, 171 int user_alloc); 172 int __kvm_set_memory_region(struct kvm *kvm, 173 struct kvm_userspace_memory_region *mem, 174 int user_alloc); 175 int kvm_arch_set_memory_region(struct kvm *kvm, 176 struct kvm_userspace_memory_region *mem, 177 struct kvm_memory_slot old, 178 int user_alloc); 179 void kvm_arch_flush_shadow(struct kvm *kvm); 180 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn); 181 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); 182 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); 183 void kvm_release_page_clean(struct page *page); 184 void kvm_release_page_dirty(struct page *page); 185 void kvm_set_page_dirty(struct page *page); 186 void kvm_set_page_accessed(struct page *page); 187 188 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); 189 void kvm_release_pfn_dirty(pfn_t); 190 void kvm_release_pfn_clean(pfn_t pfn); 191 void kvm_set_pfn_dirty(pfn_t pfn); 192 void kvm_set_pfn_accessed(pfn_t pfn); 193 void kvm_get_pfn(pfn_t pfn); 194 195 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, 196 int len); 197 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, 198 unsigned long len); 199 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); 200 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, 201 int offset, int len); 202 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, 203 unsigned long len); 204 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); 205 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); 206 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); 207 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); 208 void mark_page_dirty(struct kvm *kvm, gfn_t gfn); 209 210 void kvm_vcpu_block(struct kvm_vcpu *vcpu); 211 void kvm_resched(struct kvm_vcpu *vcpu); 212 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); 213 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); 214 void kvm_flush_remote_tlbs(struct kvm *kvm); 215 void kvm_reload_remote_mmus(struct kvm *kvm); 216 217 long kvm_arch_dev_ioctl(struct file *filp, 218 unsigned int ioctl, unsigned long arg); 219 long kvm_arch_vcpu_ioctl(struct file *filp, 220 unsigned int ioctl, unsigned long arg); 221 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 222 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 223 224 int kvm_dev_ioctl_check_extension(long ext); 225 226 int kvm_get_dirty_log(struct kvm *kvm, 227 struct kvm_dirty_log *log, int *is_dirty); 228 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, 229 struct kvm_dirty_log *log); 230 231 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, 232 struct 233 kvm_userspace_memory_region *mem, 234 int user_alloc); 235 long kvm_arch_vm_ioctl(struct file *filp, 236 unsigned int ioctl, unsigned long arg); 237 void kvm_arch_destroy_vm(struct kvm *kvm); 238 239 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 240 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); 241 242 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 243 struct kvm_translation *tr); 244 245 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 246 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); 247 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, 248 struct kvm_sregs *sregs); 249 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, 250 struct kvm_sregs *sregs); 251 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 252 struct kvm_mp_state *mp_state); 253 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 254 struct kvm_mp_state *mp_state); 255 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, 256 struct kvm_debug_guest *dbg); 257 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); 258 259 int kvm_arch_init(void *opaque); 260 void kvm_arch_exit(void); 261 262 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); 263 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); 264 265 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); 266 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 267 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); 268 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); 269 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); 270 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); 271 272 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu); 273 void kvm_arch_hardware_enable(void *garbage); 274 void kvm_arch_hardware_disable(void *garbage); 275 int kvm_arch_hardware_setup(void); 276 void kvm_arch_hardware_unsetup(void); 277 void kvm_arch_check_processor_compat(void *rtn); 278 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); 279 280 void kvm_free_physmem(struct kvm *kvm); 281 282 struct kvm *kvm_arch_create_vm(void); 283 void kvm_arch_destroy_vm(struct kvm *kvm); 284 void kvm_free_all_assigned_devices(struct kvm *kvm); 285 286 int kvm_cpu_get_interrupt(struct kvm_vcpu *v); 287 int kvm_cpu_has_interrupt(struct kvm_vcpu *v); 288 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); 289 void kvm_vcpu_kick(struct kvm_vcpu *vcpu); 290 291 int kvm_is_mmio_pfn(pfn_t pfn); 292 293 struct kvm_irq_ack_notifier { 294 struct hlist_node link; 295 unsigned gsi; 296 void (*irq_acked)(struct kvm_irq_ack_notifier *kian); 297 }; 298 299 struct kvm_assigned_dev_kernel { 300 struct kvm_irq_ack_notifier ack_notifier; 301 struct work_struct interrupt_work; 302 struct list_head list; 303 int assigned_dev_id; 304 int host_busnr; 305 int host_devfn; 306 int host_irq; 307 int guest_irq; 308 int irq_requested; 309 struct pci_dev *dev; 310 struct kvm *kvm; 311 }; 312 void kvm_set_irq(struct kvm *kvm, int irq, int level); 313 void kvm_notify_acked_irq(struct kvm *kvm, unsigned gsi); 314 void kvm_register_irq_ack_notifier(struct kvm *kvm, 315 struct kvm_irq_ack_notifier *kian); 316 void kvm_unregister_irq_ack_notifier(struct kvm *kvm, 317 struct kvm_irq_ack_notifier *kian); 318 319 #ifdef CONFIG_DMAR 320 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn, 321 unsigned long npages); 322 int kvm_iommu_map_guest(struct kvm *kvm, 323 struct kvm_assigned_dev_kernel *assigned_dev); 324 int kvm_iommu_unmap_guest(struct kvm *kvm); 325 #else /* CONFIG_DMAR */ 326 static inline int kvm_iommu_map_pages(struct kvm *kvm, 327 gfn_t base_gfn, 328 unsigned long npages) 329 { 330 return 0; 331 } 332 333 static inline int kvm_iommu_map_guest(struct kvm *kvm, 334 struct kvm_assigned_dev_kernel 335 *assigned_dev) 336 { 337 return -ENODEV; 338 } 339 340 static inline int kvm_iommu_unmap_guest(struct kvm *kvm) 341 { 342 return 0; 343 } 344 #endif /* CONFIG_DMAR */ 345 346 static inline void kvm_guest_enter(void) 347 { 348 account_system_vtime(current); 349 current->flags |= PF_VCPU; 350 } 351 352 static inline void kvm_guest_exit(void) 353 { 354 account_system_vtime(current); 355 current->flags &= ~PF_VCPU; 356 } 357 358 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot) 359 { 360 return slot - kvm->memslots; 361 } 362 363 static inline gpa_t gfn_to_gpa(gfn_t gfn) 364 { 365 return (gpa_t)gfn << PAGE_SHIFT; 366 } 367 368 static inline hpa_t pfn_to_hpa(pfn_t pfn) 369 { 370 return (hpa_t)pfn << PAGE_SHIFT; 371 } 372 373 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu) 374 { 375 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); 376 } 377 378 enum kvm_stat_kind { 379 KVM_STAT_VM, 380 KVM_STAT_VCPU, 381 }; 382 383 struct kvm_stats_debugfs_item { 384 const char *name; 385 int offset; 386 enum kvm_stat_kind kind; 387 struct dentry *dentry; 388 }; 389 extern struct kvm_stats_debugfs_item debugfs_entries[]; 390 extern struct dentry *kvm_debugfs_dir; 391 392 #define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \ 393 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 394 vcpu, 5, d1, d2, d3, d4, d5) 395 #define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \ 396 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 397 vcpu, 4, d1, d2, d3, d4, 0) 398 #define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \ 399 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 400 vcpu, 3, d1, d2, d3, 0, 0) 401 #define KVMTRACE_2D(evt, vcpu, d1, d2, name) \ 402 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 403 vcpu, 2, d1, d2, 0, 0, 0) 404 #define KVMTRACE_1D(evt, vcpu, d1, name) \ 405 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 406 vcpu, 1, d1, 0, 0, 0, 0) 407 #define KVMTRACE_0D(evt, vcpu, name) \ 408 trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \ 409 vcpu, 0, 0, 0, 0, 0, 0) 410 411 #ifdef CONFIG_KVM_TRACE 412 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg); 413 void kvm_trace_cleanup(void); 414 #else 415 static inline 416 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg) 417 { 418 return -EINVAL; 419 } 420 #define kvm_trace_cleanup() ((void)0) 421 #endif 422 423 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER 424 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq) 425 { 426 if (unlikely(vcpu->kvm->mmu_notifier_count)) 427 return 1; 428 /* 429 * Both reads happen under the mmu_lock and both values are 430 * modified under mmu_lock, so there's no need of smb_rmb() 431 * here in between, otherwise mmu_notifier_count should be 432 * read before mmu_notifier_seq, see 433 * mmu_notifier_invalidate_range_end write side. 434 */ 435 if (vcpu->kvm->mmu_notifier_seq != mmu_seq) 436 return 1; 437 return 0; 438 } 439 #endif 440 441 #endif 442