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/msi.h>
  19 #include <linux/slab.h>
  20 #include <linux/rcupdate.h>
  21 #include <asm/signal.h>
  22
  23 #include <linux/kvm.h>
  24 #include <linux/kvm_para.h>
  25
  26 #include <linux/kvm_types.h>
  27
  28 #include <asm/kvm_host.h>
  29
  30 /*
  31  * vcpu->requests bit members
  32  */
  33 #define KVM_REQ_TLB_FLUSH          0
  34 #define KVM_REQ_MIGRATE_TIMER      1
  35 #define KVM_REQ_REPORT_TPR_ACCESS  2
  36 #define KVM_REQ_MMU_RELOAD         3
  37 #define KVM_REQ_TRIPLE_FAULT       4
  38 #define KVM_REQ_PENDING_TIMER      5
  39 #define KVM_REQ_UNHALT             6
  40 #define KVM_REQ_MMU_SYNC           7
  41 #define KVM_REQ_CLOCK_UPDATE       8
  42 #define KVM_REQ_KICK               9
  43 #define KVM_REQ_DEACTIVATE_FPU    10
  44 #define KVM_REQ_EVENT             11
  45 #define KVM_REQ_APF_HALT          12
  46
  47 #define KVM_USERSPACE_IRQ_SOURCE_ID     0
  48
  49 struct kvm;
  50 struct kvm_vcpu;
  51 extern struct kmem_cache *kvm_vcpu_cache;
  52
  53 /*
  54  * It would be nice to use something smarter than a linear search, TBD...
  55  * Thankfully we dont expect many devices to register (famous last words :),
  56  * so until then it will suffice.  At least its abstracted so we can change
  57  * in one place.
  58  */
  59 struct kvm_io_bus {
  60         int                   dev_count;
  61 #define NR_IOBUS_DEVS 200
  62         struct kvm_io_device *devs[NR_IOBUS_DEVS];
  63 };
  64
  65 enum kvm_bus {
  66         KVM_MMIO_BUS,
  67         KVM_PIO_BUS,
  68         KVM_NR_BUSES
  69 };
  70
  71 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
  72                      int len, const void *val);
  73 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
  74                     void *val);
  75 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx,
  76                             struct kvm_io_device *dev);
  77 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
  78                               struct kvm_io_device *dev);
  79
  80 #ifdef CONFIG_KVM_ASYNC_PF
  81 struct kvm_async_pf {
  82         struct work_struct work;
  83         struct list_head link;
  84         struct list_head queue;
  85         struct kvm_vcpu *vcpu;
  86         struct mm_struct *mm;
  87         gva_t gva;
  88         unsigned long addr;
  89         struct kvm_arch_async_pf arch;
  90         struct page *page;
  91         bool done;
  92 };
  93
  94 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
  95 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
  96 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
  97                        struct kvm_arch_async_pf *arch);
  98 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
  99 #endif
 100
 101 struct kvm_vcpu {
 102         struct kvm *kvm;
 103 #ifdef CONFIG_PREEMPT_NOTIFIERS
 104         struct preempt_notifier preempt_notifier;
 105 #endif
 106         int vcpu_id;
 107         struct mutex mutex;
 108         int   cpu;
 109         atomic_t guest_mode;
 110         struct kvm_run *run;
 111         unsigned long requests;
 112         unsigned long guest_debug;
 113         int srcu_idx;
 114
 115         int fpu_active;
 116         int guest_fpu_loaded, guest_xcr0_loaded;
 117         wait_queue_head_t wq;
 118         int sigset_active;
 119         sigset_t sigset;
 120         struct kvm_vcpu_stat stat;
 121
 122 #ifdef CONFIG_HAS_IOMEM
 123         int mmio_needed;
 124         int mmio_read_completed;
 125         int mmio_is_write;
 126         int mmio_size;
 127         unsigned char mmio_data[8];
 128         gpa_t mmio_phys_addr;
 129 #endif
 130
 131 #ifdef CONFIG_KVM_ASYNC_PF
 132         struct {
 133                 u32 queued;
 134                 struct list_head queue;
 135                 struct list_head done;
 136                 spinlock_t lock;
 137         } async_pf;
 138 #endif
 139
 140         struct kvm_vcpu_arch arch;
 141 };
 142
 143 /*
 144  * Some of the bitops functions do not support too long bitmaps.
 145  * This number must be determined not to exceed such limits.
 146  */
 147 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
 148
 149 struct kvm_lpage_info {
 150         unsigned long rmap_pde;
 151         int write_count;
 152 };
 153
 154 struct kvm_memory_slot {
 155         gfn_t base_gfn;
 156         unsigned long npages;
 157         unsigned long flags;
 158         unsigned long *rmap;
 159         unsigned long *dirty_bitmap;
 160         unsigned long *dirty_bitmap_head;
 161         struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
 162         unsigned long userspace_addr;
 163         int user_alloc;
 164         int id;
 165 };
 166
 167 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
 168 {
 169         return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
 170 }
 171
 172 struct kvm_kernel_irq_routing_entry {
 173         u32 gsi;
 174         u32 type;
 175         int (*set)(struct kvm_kernel_irq_routing_entry *e,
 176                    struct kvm *kvm, int irq_source_id, int level);
 177         union {
 178                 struct {
 179                         unsigned irqchip;
 180                         unsigned pin;
 181                 } irqchip;
 182                 struct msi_msg msi;
 183         };
 184         struct hlist_node link;
 185 };
 186
 187 #ifdef __KVM_HAVE_IOAPIC
 188
 189 struct kvm_irq_routing_table {
 190         int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
 191         struct kvm_kernel_irq_routing_entry *rt_entries;
 192         u32 nr_rt_entries;
 193         /*
 194          * Array indexed by gsi. Each entry contains list of irq chips
 195          * the gsi is connected to.
 196          */
 197         struct hlist_head map[0];
 198 };
 199
 200 #else
 201
 202 struct kvm_irq_routing_table {};
 203
 204 #endif
 205
 206 struct kvm_memslots {
 207         int nmemslots;
 208         u64 generation;
 209         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 210                                         KVM_PRIVATE_MEM_SLOTS];
 211 };
 212
 213 struct kvm {
 214         spinlock_t mmu_lock;
 215         raw_spinlock_t requests_lock;
 216         struct mutex slots_lock;
 217         struct mm_struct *mm; /* userspace tied to this vm */
 218         struct kvm_memslots *memslots;
 219         struct srcu_struct srcu;
 220 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 221         u32 bsp_vcpu_id;
 222         struct kvm_vcpu *bsp_vcpu;
 223 #endif
 224         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 225         atomic_t online_vcpus;
 226         struct list_head vm_list;
 227         struct mutex lock;
 228         struct kvm_io_bus *buses[KVM_NR_BUSES];
 229 #ifdef CONFIG_HAVE_KVM_EVENTFD
 230         struct {
 231                 spinlock_t        lock;
 232                 struct list_head  items;
 233         } irqfds;
 234         struct list_head ioeventfds;
 235 #endif
 236         struct kvm_vm_stat stat;
 237         struct kvm_arch arch;
 238         atomic_t users_count;
 239 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 240         struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
 241         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 242 #endif
 243
 244         struct mutex irq_lock;
 245 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 246         /*
 247          * Update side is protected by irq_lock and,
 248          * if configured, irqfds.lock.
 249          */
 250         struct kvm_irq_routing_table __rcu *irq_routing;
 251         struct hlist_head mask_notifier_list;
 252         struct hlist_head irq_ack_notifier_list;
 253 #endif
 254
 255 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 256         struct mmu_notifier mmu_notifier;
 257         unsigned long mmu_notifier_seq;
 258         long mmu_notifier_count;
 259 #endif
 260         long tlbs_dirty;
 261 };
 262
 263 /* The guest did something we don't support. */
 264 #define pr_unimpl(vcpu, fmt, ...)                                       \
 265  do {                                                                   \
 266         if (printk_ratelimit())                                         \
 267                 printk(KERN_ERR "kvm: %i: cpu%i " fmt,                  \
 268                        current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 269  } while (0)
 270
 271 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 272 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 273
 274 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 275 {
 276         smp_rmb();
 277         return kvm->vcpus[i];
 278 }
 279
 280 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
 281         for (idx = 0, vcpup = kvm_get_vcpu(kvm, idx); \
 282              idx < atomic_read(&kvm->online_vcpus) && vcpup; \
 283              vcpup = kvm_get_vcpu(kvm, ++idx))
 284
 285 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 286 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 287
 288 void vcpu_load(struct kvm_vcpu *vcpu);
 289 void vcpu_put(struct kvm_vcpu *vcpu);
 290
 291 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
 292                   struct module *module);
 293 void kvm_exit(void);
 294
 295 void kvm_get_kvm(struct kvm *kvm);
 296 void kvm_put_kvm(struct kvm *kvm);
 297
 298 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
 299 {
 300         return rcu_dereference_check(kvm->memslots,
 301                         srcu_read_lock_held(&kvm->srcu)
 302                         || lockdep_is_held(&kvm->slots_lock));
 303 }
 304
 305 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 306 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 307 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 308
 309 extern struct page *bad_page;
 310 extern pfn_t bad_pfn;
 311
 312 int is_error_page(struct page *page);
 313 int is_error_pfn(pfn_t pfn);
 314 int is_hwpoison_pfn(pfn_t pfn);
 315 int is_fault_pfn(pfn_t pfn);
 316 int kvm_is_error_hva(unsigned long addr);
 317 int kvm_set_memory_region(struct kvm *kvm,
 318                           struct kvm_userspace_memory_region *mem,
 319                           int user_alloc);
 320 int __kvm_set_memory_region(struct kvm *kvm,
 321                             struct kvm_userspace_memory_region *mem,
 322                             int user_alloc);
 323 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 324                                 struct kvm_memory_slot *memslot,
 325                                 struct kvm_memory_slot old,
 326                                 struct kvm_userspace_memory_region *mem,
 327                                 int user_alloc);
 328 void kvm_arch_commit_memory_region(struct kvm *kvm,
 329                                 struct kvm_userspace_memory_region *mem,
 330                                 struct kvm_memory_slot old,
 331                                 int user_alloc);
 332 void kvm_disable_largepages(void);
 333 void kvm_arch_flush_shadow(struct kvm *kvm);
 334
 335 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
 336                             int nr_pages);
 337
 338 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 339 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 340 void kvm_release_page_clean(struct page *page);
 341 void kvm_release_page_dirty(struct page *page);
 342 void kvm_set_page_dirty(struct page *page);
 343 void kvm_set_page_accessed(struct page *page);
 344
 345 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
 346 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
 347 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
 348                        bool write_fault, bool *writable);
 349 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 350 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
 351                       bool *writable);
 352 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
 353                          struct kvm_memory_slot *slot, gfn_t gfn);
 354 int memslot_id(struct kvm *kvm, gfn_t gfn);
 355 void kvm_release_pfn_dirty(pfn_t);
 356 void kvm_release_pfn_clean(pfn_t pfn);
 357 void kvm_set_pfn_dirty(pfn_t pfn);
 358 void kvm_set_pfn_accessed(pfn_t pfn);
 359 void kvm_get_pfn(pfn_t pfn);
 360
 361 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 362                         int len);
 363 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 364                           unsigned long len);
 365 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 366 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 367                          int offset, int len);
 368 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 369                     unsigned long len);
 370 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 371                            void *data, unsigned long len);
 372 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 373                               gpa_t gpa);
 374 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 375 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 376 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 377 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 378 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
 379 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 380 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
 381                              gfn_t gfn);
 382
 383 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 384 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
 385 void kvm_resched(struct kvm_vcpu *vcpu);
 386 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 387 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 388
 389 void kvm_flush_remote_tlbs(struct kvm *kvm);
 390 void kvm_reload_remote_mmus(struct kvm *kvm);
 391
 392 long kvm_arch_dev_ioctl(struct file *filp,
 393                         unsigned int ioctl, unsigned long arg);
 394 long kvm_arch_vcpu_ioctl(struct file *filp,
 395                          unsigned int ioctl, unsigned long arg);
 396
 397 int kvm_dev_ioctl_check_extension(long ext);
 398
 399 int kvm_get_dirty_log(struct kvm *kvm,
 400                         struct kvm_dirty_log *log, int *is_dirty);
 401 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 402                                 struct kvm_dirty_log *log);
 403
 404 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 405                                    struct
 406                                    kvm_userspace_memory_region *mem,
 407                                    int user_alloc);
 408 long kvm_arch_vm_ioctl(struct file *filp,
 409                        unsigned int ioctl, unsigned long arg);
 410
 411 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 412 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 413
 414 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 415                                     struct kvm_translation *tr);
 416
 417 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 418 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 419 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 420                                   struct kvm_sregs *sregs);
 421 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 422                                   struct kvm_sregs *sregs);
 423 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 424                                     struct kvm_mp_state *mp_state);
 425 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 426                                     struct kvm_mp_state *mp_state);
 427 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 428                                         struct kvm_guest_debug *dbg);
 429 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 430
 431 int kvm_arch_init(void *opaque);
 432 void kvm_arch_exit(void);
 433
 434 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 435 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 436
 437 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 438 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 439 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 440 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 441 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 442 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 443
 444 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 445 int kvm_arch_hardware_enable(void *garbage);
 446 void kvm_arch_hardware_disable(void *garbage);
 447 int kvm_arch_hardware_setup(void);
 448 void kvm_arch_hardware_unsetup(void);
 449 void kvm_arch_check_processor_compat(void *rtn);
 450 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 451
 452 void kvm_free_physmem(struct kvm *kvm);
 453
 454 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
 455 static inline struct kvm *kvm_arch_alloc_vm(void)
 456 {
 457         return kzalloc(sizeof(struct kvm), GFP_KERNEL);
 458 }
 459
 460 static inline void kvm_arch_free_vm(struct kvm *kvm)
 461 {
 462         kfree(kvm);
 463 }
 464 #endif
 465
 466 int kvm_arch_init_vm(struct kvm *kvm);
 467 void kvm_arch_destroy_vm(struct kvm *kvm);
 468 void kvm_free_all_assigned_devices(struct kvm *kvm);
 469 void kvm_arch_sync_events(struct kvm *kvm);
 470
 471 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 472 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 473
 474 int kvm_is_mmio_pfn(pfn_t pfn);
 475
 476 struct kvm_irq_ack_notifier {
 477         struct hlist_node link;
 478         unsigned gsi;
 479         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 480 };
 481
 482 struct kvm_assigned_dev_kernel {
 483         struct kvm_irq_ack_notifier ack_notifier;
 484         struct list_head list;
 485         int assigned_dev_id;
 486         int host_segnr;
 487         int host_busnr;
 488         int host_devfn;
 489         unsigned int entries_nr;
 490         int host_irq;
 491         bool host_irq_disabled;
 492         struct msix_entry *host_msix_entries;
 493         int guest_irq;
 494         struct msix_entry *guest_msix_entries;
 495         unsigned long irq_requested_type;
 496         int irq_source_id;
 497         int flags;
 498         struct pci_dev *dev;
 499         struct kvm *kvm;
 500         spinlock_t intx_lock;
 501         char irq_name[32];
 502 };
 503
 504 struct kvm_irq_mask_notifier {
 505         void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 506         int irq;
 507         struct hlist_node link;
 508 };
 509
 510 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 511                                     struct kvm_irq_mask_notifier *kimn);
 512 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 513                                       struct kvm_irq_mask_notifier *kimn);
 514 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
 515                              bool mask);
 516
 517 #ifdef __KVM_HAVE_IOAPIC
 518 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
 519                                    union kvm_ioapic_redirect_entry *entry,
 520                                    unsigned long *deliver_bitmask);
 521 #endif
 522 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 523 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
 524                 int irq_source_id, int level);
 525 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 526 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 527                                    struct kvm_irq_ack_notifier *kian);
 528 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 529                                    struct kvm_irq_ack_notifier *kian);
 530 int kvm_request_irq_source_id(struct kvm *kvm);
 531 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 532
 533 /* For vcpu->arch.iommu_flags */
 534 #define KVM_IOMMU_CACHE_COHERENCY       0x1
 535
 536 #ifdef CONFIG_IOMMU_API
 537 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 538 int kvm_iommu_map_guest(struct kvm *kvm);
 539 int kvm_iommu_unmap_guest(struct kvm *kvm);
 540 int kvm_assign_device(struct kvm *kvm,
 541                       struct kvm_assigned_dev_kernel *assigned_dev);
 542 int kvm_deassign_device(struct kvm *kvm,
 543                         struct kvm_assigned_dev_kernel *assigned_dev);
 544 #else /* CONFIG_IOMMU_API */
 545 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 546                                       struct kvm_memory_slot *slot)
 547 {
 548         return 0;
 549 }
 550
 551 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 552 {
 553         return -ENODEV;
 554 }
 555
 556 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 557 {
 558         return 0;
 559 }
 560
 561 static inline int kvm_assign_device(struct kvm *kvm,
 562                 struct kvm_assigned_dev_kernel *assigned_dev)
 563 {
 564         return 0;
 565 }
 566
 567 static inline int kvm_deassign_device(struct kvm *kvm,
 568                 struct kvm_assigned_dev_kernel *assigned_dev)
 569 {
 570         return 0;
 571 }
 572 #endif /* CONFIG_IOMMU_API */
 573
 574 static inline void kvm_guest_enter(void)
 575 {
 576         account_system_vtime(current);
 577         current->flags |= PF_VCPU;
 578 }
 579
 580 static inline void kvm_guest_exit(void)
 581 {
 582         account_system_vtime(current);
 583         current->flags &= ~PF_VCPU;
 584 }
 585
 586 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
 587                                                gfn_t gfn)
 588 {
 589         return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
 590 }
 591
 592 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 593 {
 594         return (gpa_t)gfn << PAGE_SHIFT;
 595 }
 596
 597 static inline gfn_t gpa_to_gfn(gpa_t gpa)
 598 {
 599         return (gfn_t)(gpa >> PAGE_SHIFT);
 600 }
 601
 602 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 603 {
 604         return (hpa_t)pfn << PAGE_SHIFT;
 605 }
 606
 607 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 608 {
 609         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 610 }
 611
 612 enum kvm_stat_kind {
 613         KVM_STAT_VM,
 614         KVM_STAT_VCPU,
 615 };
 616
 617 struct kvm_stats_debugfs_item {
 618         const char *name;
 619         int offset;
 620         enum kvm_stat_kind kind;
 621         struct dentry *dentry;
 622 };
 623 extern struct kvm_stats_debugfs_item debugfs_entries[];
 624 extern struct dentry *kvm_debugfs_dir;
 625
 626 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 627 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 628 {
 629         if (unlikely(vcpu->kvm->mmu_notifier_count))
 630                 return 1;
 631         /*
 632          * Both reads happen under the mmu_lock and both values are
 633          * modified under mmu_lock, so there's no need of smb_rmb()
 634          * here in between, otherwise mmu_notifier_count should be
 635          * read before mmu_notifier_seq, see
 636          * mmu_notifier_invalidate_range_end write side.
 637          */
 638         if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 639                 return 1;
 640         return 0;
 641 }
 642 #endif
 643
 644 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 645
 646 #define KVM_MAX_IRQ_ROUTES 1024
 647
 648 int kvm_setup_default_irq_routing(struct kvm *kvm);
 649 int kvm_set_irq_routing(struct kvm *kvm,
 650                         const struct kvm_irq_routing_entry *entries,
 651                         unsigned nr,
 652                         unsigned flags);
 653 void kvm_free_irq_routing(struct kvm *kvm);
 654
 655 #else
 656
 657 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 658
 659 #endif
 660
 661 #ifdef CONFIG_HAVE_KVM_EVENTFD
 662
 663 void kvm_eventfd_init(struct kvm *kvm);
 664 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
 665 void kvm_irqfd_release(struct kvm *kvm);
 666 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
 667 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 668
 669 #else
 670
 671 static inline void kvm_eventfd_init(struct kvm *kvm) {}
 672
 673 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
 674 {
 675         return -EINVAL;
 676 }
 677
 678 static inline void kvm_irqfd_release(struct kvm *kvm) {}
 679
 680 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 681 static inline void kvm_irq_routing_update(struct kvm *kvm,
 682                                           struct kvm_irq_routing_table *irq_rt)
 683 {
 684         rcu_assign_pointer(kvm->irq_routing, irq_rt);
 685 }
 686 #endif
 687
 688 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
 689 {
 690         return -ENOSYS;
 691 }
 692
 693 #endif /* CONFIG_HAVE_KVM_EVENTFD */
 694
 695 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 696 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
 697 {
 698         return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
 699 }
 700 #endif
 701
 702 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
 703
 704 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 705                                   unsigned long arg);
 706
 707 #else
 708
 709 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 710                                                 unsigned long arg)
 711 {
 712         return -ENOTTY;
 713 }
 714
 715 #endif
 716
 717 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
 718 {
 719         set_bit(req, &vcpu->requests);
 720 }
 721
 722 static inline bool kvm_make_check_request(int req, struct kvm_vcpu *vcpu)
 723 {
 724         return test_and_set_bit(req, &vcpu->requests);
 725 }
 726
 727 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
 728 {
 729         if (test_bit(req, &vcpu->requests)) {
 730                 clear_bit(req, &vcpu->requests);
 731                 return true;
 732         } else {
 733                 return false;
 734         }
 735 }
 736
 737 #endif
 738