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         unsigned long 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 CONFIG_HAVE_KVM_IRQCHIP
 131         struct hlist_head mask_notifier_list;
 132 #endif
 133
 134 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 135         struct mmu_notifier mmu_notifier;
 136         unsigned long mmu_notifier_seq;
 137         long mmu_notifier_count;
 138 #endif
 139 };
 140
 141 /* The guest did something we don't support. */
 142 #define pr_unimpl(vcpu, fmt, ...)                                       \
 143  do {                                                                   \
 144         if (printk_ratelimit())                                         \
 145                 printk(KERN_ERR "kvm: %i: cpu%i " fmt,                  \
 146                        current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 147  } while (0)
 148
 149 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 150 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 151
 152 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 153 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 154
 155 void vcpu_load(struct kvm_vcpu *vcpu);
 156 void vcpu_put(struct kvm_vcpu *vcpu);
 157
 158 int kvm_init(void *opaque, unsigned int vcpu_size,
 159                   struct module *module);
 160 void kvm_exit(void);
 161
 162 void kvm_get_kvm(struct kvm *kvm);
 163 void kvm_put_kvm(struct kvm *kvm);
 164
 165 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 166 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 167 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 168 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
 169
 170 extern struct page *bad_page;
 171 extern pfn_t bad_pfn;
 172
 173 int is_error_page(struct page *page);
 174 int is_error_pfn(pfn_t pfn);
 175 int kvm_is_error_hva(unsigned long addr);
 176 int kvm_set_memory_region(struct kvm *kvm,
 177                           struct kvm_userspace_memory_region *mem,
 178                           int user_alloc);
 179 int __kvm_set_memory_region(struct kvm *kvm,
 180                             struct kvm_userspace_memory_region *mem,
 181                             int user_alloc);
 182 int kvm_arch_set_memory_region(struct kvm *kvm,
 183                                 struct kvm_userspace_memory_region *mem,
 184                                 struct kvm_memory_slot old,
 185                                 int user_alloc);
 186 void kvm_arch_flush_shadow(struct kvm *kvm);
 187 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
 188 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 189 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 190 void kvm_release_page_clean(struct page *page);
 191 void kvm_release_page_dirty(struct page *page);
 192 void kvm_set_page_dirty(struct page *page);
 193 void kvm_set_page_accessed(struct page *page);
 194
 195 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 196 void kvm_release_pfn_dirty(pfn_t);
 197 void kvm_release_pfn_clean(pfn_t pfn);
 198 void kvm_set_pfn_dirty(pfn_t pfn);
 199 void kvm_set_pfn_accessed(pfn_t pfn);
 200 void kvm_get_pfn(pfn_t pfn);
 201
 202 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 203                         int len);
 204 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 205                           unsigned long len);
 206 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 207 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 208                          int offset, int len);
 209 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 210                     unsigned long len);
 211 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 212 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 213 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 214 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 215 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 216
 217 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 218 void kvm_resched(struct kvm_vcpu *vcpu);
 219 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 220 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 221 void kvm_flush_remote_tlbs(struct kvm *kvm);
 222 void kvm_reload_remote_mmus(struct kvm *kvm);
 223
 224 long kvm_arch_dev_ioctl(struct file *filp,
 225                         unsigned int ioctl, unsigned long arg);
 226 long kvm_arch_vcpu_ioctl(struct file *filp,
 227                          unsigned int ioctl, unsigned long arg);
 228 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 229 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 230
 231 int kvm_dev_ioctl_check_extension(long ext);
 232
 233 int kvm_get_dirty_log(struct kvm *kvm,
 234                         struct kvm_dirty_log *log, int *is_dirty);
 235 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 236                                 struct kvm_dirty_log *log);
 237
 238 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 239                                    struct
 240                                    kvm_userspace_memory_region *mem,
 241                                    int user_alloc);
 242 long kvm_arch_vm_ioctl(struct file *filp,
 243                        unsigned int ioctl, unsigned long arg);
 244
 245 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 246 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 247
 248 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 249                                     struct kvm_translation *tr);
 250
 251 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 252 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 253 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 254                                   struct kvm_sregs *sregs);
 255 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 256                                   struct kvm_sregs *sregs);
 257 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 258                                     struct kvm_mp_state *mp_state);
 259 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 260                                     struct kvm_mp_state *mp_state);
 261 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 262                                         struct kvm_guest_debug *dbg);
 263 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 264
 265 int kvm_arch_init(void *opaque);
 266 void kvm_arch_exit(void);
 267
 268 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 269 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 270
 271 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 272 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 273 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 274 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 275 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 276 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 277
 278 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 279 void kvm_arch_hardware_enable(void *garbage);
 280 void kvm_arch_hardware_disable(void *garbage);
 281 int kvm_arch_hardware_setup(void);
 282 void kvm_arch_hardware_unsetup(void);
 283 void kvm_arch_check_processor_compat(void *rtn);
 284 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 285
 286 void kvm_free_physmem(struct kvm *kvm);
 287
 288 struct  kvm *kvm_arch_create_vm(void);
 289 void kvm_arch_destroy_vm(struct kvm *kvm);
 290 void kvm_free_all_assigned_devices(struct kvm *kvm);
 291 void kvm_arch_sync_events(struct kvm *kvm);
 292
 293 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
 294 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
 295 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 296 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 297
 298 int kvm_is_mmio_pfn(pfn_t pfn);
 299
 300 struct kvm_irq_ack_notifier {
 301         struct hlist_node link;
 302         unsigned gsi;
 303         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 304 };
 305
 306 struct kvm_assigned_dev_kernel {
 307         struct kvm_irq_ack_notifier ack_notifier;
 308         struct work_struct interrupt_work;
 309         struct list_head list;
 310         int assigned_dev_id;
 311         int host_busnr;
 312         int host_devfn;
 313         int host_irq;
 314         bool host_irq_disabled;
 315         int guest_irq;
 316         struct msi_msg guest_msi;
 317 #define KVM_ASSIGNED_DEV_GUEST_INTX     (1 << 0)
 318 #define KVM_ASSIGNED_DEV_GUEST_MSI      (1 << 1)
 319 #define KVM_ASSIGNED_DEV_HOST_INTX      (1 << 8)
 320 #define KVM_ASSIGNED_DEV_HOST_MSI       (1 << 9)
 321         unsigned long irq_requested_type;
 322         int irq_source_id;
 323         int flags;
 324         struct pci_dev *dev;
 325         struct kvm *kvm;
 326 };
 327
 328 struct kvm_irq_mask_notifier {
 329         void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 330         int irq;
 331         struct hlist_node link;
 332 };
 333
 334 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 335                                     struct kvm_irq_mask_notifier *kimn);
 336 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 337                                       struct kvm_irq_mask_notifier *kimn);
 338 void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
 339
 340 void kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level);
 341 void kvm_notify_acked_irq(struct kvm *kvm, unsigned gsi);
 342 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 343                                    struct kvm_irq_ack_notifier *kian);
 344 void kvm_unregister_irq_ack_notifier(struct kvm_irq_ack_notifier *kian);
 345 int kvm_request_irq_source_id(struct kvm *kvm);
 346 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 347
 348 #ifdef CONFIG_IOMMU_API
 349 int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn,
 350                         unsigned long npages);
 351 int kvm_iommu_map_guest(struct kvm *kvm);
 352 int kvm_iommu_unmap_guest(struct kvm *kvm);
 353 int kvm_assign_device(struct kvm *kvm,
 354                       struct kvm_assigned_dev_kernel *assigned_dev);
 355 int kvm_deassign_device(struct kvm *kvm,
 356                         struct kvm_assigned_dev_kernel *assigned_dev);
 357 #else /* CONFIG_IOMMU_API */
 358 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 359                                       gfn_t base_gfn,
 360                                       unsigned long npages)
 361 {
 362         return 0;
 363 }
 364
 365 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 366 {
 367         return -ENODEV;
 368 }
 369
 370 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 371 {
 372         return 0;
 373 }
 374
 375 static inline int kvm_assign_device(struct kvm *kvm,
 376                 struct kvm_assigned_dev_kernel *assigned_dev)
 377 {
 378         return 0;
 379 }
 380
 381 static inline int kvm_deassign_device(struct kvm *kvm,
 382                 struct kvm_assigned_dev_kernel *assigned_dev)
 383 {
 384         return 0;
 385 }
 386 #endif /* CONFIG_IOMMU_API */
 387
 388 static inline void kvm_guest_enter(void)
 389 {
 390         account_system_vtime(current);
 391         current->flags |= PF_VCPU;
 392 }
 393
 394 static inline void kvm_guest_exit(void)
 395 {
 396         account_system_vtime(current);
 397         current->flags &= ~PF_VCPU;
 398 }
 399
 400 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
 401 {
 402         return slot - kvm->memslots;
 403 }
 404
 405 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 406 {
 407         return (gpa_t)gfn << PAGE_SHIFT;
 408 }
 409
 410 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 411 {
 412         return (hpa_t)pfn << PAGE_SHIFT;
 413 }
 414
 415 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 416 {
 417         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 418 }
 419
 420 enum kvm_stat_kind {
 421         KVM_STAT_VM,
 422         KVM_STAT_VCPU,
 423 };
 424
 425 struct kvm_stats_debugfs_item {
 426         const char *name;
 427         int offset;
 428         enum kvm_stat_kind kind;
 429         struct dentry *dentry;
 430 };
 431 extern struct kvm_stats_debugfs_item debugfs_entries[];
 432 extern struct dentry *kvm_debugfs_dir;
 433
 434 #define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \
 435         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 436                                                 vcpu, 5, d1, d2, d3, d4, d5)
 437 #define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \
 438         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 439                                                 vcpu, 4, d1, d2, d3, d4, 0)
 440 #define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \
 441         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 442                                                 vcpu, 3, d1, d2, d3, 0, 0)
 443 #define KVMTRACE_2D(evt, vcpu, d1, d2, name) \
 444         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 445                                                 vcpu, 2, d1, d2, 0, 0, 0)
 446 #define KVMTRACE_1D(evt, vcpu, d1, name) \
 447         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 448                                                 vcpu, 1, d1, 0, 0, 0, 0)
 449 #define KVMTRACE_0D(evt, vcpu, name) \
 450         trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 451                                                 vcpu, 0, 0, 0, 0, 0, 0)
 452
 453 #ifdef CONFIG_KVM_TRACE
 454 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg);
 455 void kvm_trace_cleanup(void);
 456 #else
 457 static inline
 458 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg)
 459 {
 460         return -EINVAL;
 461 }
 462 #define kvm_trace_cleanup() ((void)0)
 463 #endif
 464
 465 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 466 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 467 {
 468         if (unlikely(vcpu->kvm->mmu_notifier_count))
 469                 return 1;
 470         /*
 471          * Both reads happen under the mmu_lock and both values are
 472          * modified under mmu_lock, so there's no need of smb_rmb()
 473          * here in between, otherwise mmu_notifier_count should be
 474          * read before mmu_notifier_seq, see
 475          * mmu_notifier_invalidate_range_end write side.
 476          */
 477         if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 478                 return 1;
 479         return 0;
 480 }
 481 #endif
 482
 483 #endif