include/linux/kvm_host.h

   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