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 <linux/ratelimit.h>
  22 #include <asm/signal.h>
  23
  24 #include <linux/kvm.h>
  25 #include <linux/kvm_para.h>
  26
  27 #include <linux/kvm_types.h>
  28
  29 #include <asm/kvm_host.h>
  30
  31 #ifndef KVM_MMIO_SIZE
  32 #define KVM_MMIO_SIZE 8
  33 #endif
  34
  35 /*
  36  * vcpu->requests bit members
  37  */
  38 #define KVM_REQ_TLB_FLUSH          0
  39 #define KVM_REQ_MIGRATE_TIMER      1
  40 #define KVM_REQ_REPORT_TPR_ACCESS  2
  41 #define KVM_REQ_MMU_RELOAD         3
  42 #define KVM_REQ_TRIPLE_FAULT       4
  43 #define KVM_REQ_PENDING_TIMER      5
  44 #define KVM_REQ_UNHALT             6
  45 #define KVM_REQ_MMU_SYNC           7
  46 #define KVM_REQ_CLOCK_UPDATE       8
  47 #define KVM_REQ_KICK               9
  48 #define KVM_REQ_DEACTIVATE_FPU    10
  49 #define KVM_REQ_EVENT             11
  50 #define KVM_REQ_APF_HALT          12
  51 #define KVM_REQ_STEAL_UPDATE      13
  52 #define KVM_REQ_NMI               14
  53
  54 #define KVM_USERSPACE_IRQ_SOURCE_ID     0
  55
  56 struct kvm;
  57 struct kvm_vcpu;
  58 extern struct kmem_cache *kvm_vcpu_cache;
  59
  60 struct kvm_io_range {
  61         gpa_t addr;
  62         int len;
  63         struct kvm_io_device *dev;
  64 };
  65
  66 struct kvm_io_bus {
  67         int                   dev_count;
  68 #define NR_IOBUS_DEVS 300
  69         struct kvm_io_range range[NR_IOBUS_DEVS];
  70 };
  71
  72 enum kvm_bus {
  73         KVM_MMIO_BUS,
  74         KVM_PIO_BUS,
  75         KVM_NR_BUSES
  76 };
  77
  78 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
  79                      int len, const void *val);
  80 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
  81                     void *val);
  82 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
  83                             int len, struct kvm_io_device *dev);
  84 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
  85                               struct kvm_io_device *dev);
  86
  87 #ifdef CONFIG_KVM_ASYNC_PF
  88 struct kvm_async_pf {
  89         struct work_struct work;
  90         struct list_head link;
  91         struct list_head queue;
  92         struct kvm_vcpu *vcpu;
  93         struct mm_struct *mm;
  94         gva_t gva;
  95         unsigned long addr;
  96         struct kvm_arch_async_pf arch;
  97         struct page *page;
  98         bool done;
  99 };
 100
 101 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
 102 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
 103 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
 104                        struct kvm_arch_async_pf *arch);
 105 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
 106 #endif
 107
 108 enum {
 109         OUTSIDE_GUEST_MODE,
 110         IN_GUEST_MODE,
 111         EXITING_GUEST_MODE
 112 };
 113
 114 struct kvm_vcpu {
 115         struct kvm *kvm;
 116 #ifdef CONFIG_PREEMPT_NOTIFIERS
 117         struct preempt_notifier preempt_notifier;
 118 #endif
 119         int cpu;
 120         int vcpu_id;
 121         int srcu_idx;
 122         int mode;
 123         unsigned long requests;
 124         unsigned long guest_debug;
 125
 126         struct mutex mutex;
 127         struct kvm_run *run;
 128
 129         int fpu_active;
 130         int guest_fpu_loaded, guest_xcr0_loaded;
 131         wait_queue_head_t wq;
 132         struct pid *pid;
 133         int sigset_active;
 134         sigset_t sigset;
 135         struct kvm_vcpu_stat stat;
 136
 137 #ifdef CONFIG_HAS_IOMEM
 138         int mmio_needed;
 139         int mmio_read_completed;
 140         int mmio_is_write;
 141         int mmio_size;
 142         int mmio_index;
 143         unsigned char mmio_data[KVM_MMIO_SIZE];
 144         gpa_t mmio_phys_addr;
 145 #endif
 146
 147 #ifdef CONFIG_KVM_ASYNC_PF
 148         struct {
 149                 u32 queued;
 150                 struct list_head queue;
 151                 struct list_head done;
 152                 spinlock_t lock;
 153         } async_pf;
 154 #endif
 155
 156         struct kvm_vcpu_arch arch;
 157 };
 158
 159 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
 160 {
 161         return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
 162 }
 163
 164 /*
 165  * Some of the bitops functions do not support too long bitmaps.
 166  * This number must be determined not to exceed such limits.
 167  */
 168 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
 169
 170 struct kvm_lpage_info {
 171         unsigned long rmap_pde;
 172         int write_count;
 173 };
 174
 175 struct kvm_memory_slot {
 176         gfn_t base_gfn;
 177         unsigned long npages;
 178         unsigned long flags;
 179         unsigned long *rmap;
 180         unsigned long *dirty_bitmap;
 181         unsigned long *dirty_bitmap_head;
 182         struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
 183         unsigned long userspace_addr;
 184         int user_alloc;
 185         int id;
 186 };
 187
 188 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
 189 {
 190         return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
 191 }
 192
 193 struct kvm_kernel_irq_routing_entry {
 194         u32 gsi;
 195         u32 type;
 196         int (*set)(struct kvm_kernel_irq_routing_entry *e,
 197                    struct kvm *kvm, int irq_source_id, int level);
 198         union {
 199                 struct {
 200                         unsigned irqchip;
 201                         unsigned pin;
 202                 } irqchip;
 203                 struct msi_msg msi;
 204         };
 205         struct hlist_node link;
 206 };
 207
 208 #ifdef __KVM_HAVE_IOAPIC
 209
 210 struct kvm_irq_routing_table {
 211         int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
 212         struct kvm_kernel_irq_routing_entry *rt_entries;
 213         u32 nr_rt_entries;
 214         /*
 215          * Array indexed by gsi. Each entry contains list of irq chips
 216          * the gsi is connected to.
 217          */
 218         struct hlist_head map[0];
 219 };
 220
 221 #else
 222
 223 struct kvm_irq_routing_table {};
 224
 225 #endif
 226
 227 struct kvm_memslots {
 228         int nmemslots;
 229         u64 generation;
 230         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 231                                         KVM_PRIVATE_MEM_SLOTS];
 232 };
 233
 234 struct kvm {
 235         spinlock_t mmu_lock;
 236         struct mutex slots_lock;
 237         struct mm_struct *mm; /* userspace tied to this vm */
 238         struct kvm_memslots *memslots;
 239         struct srcu_struct srcu;
 240 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 241         u32 bsp_vcpu_id;
 242         struct kvm_vcpu *bsp_vcpu;
 243 #endif
 244         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 245         atomic_t online_vcpus;
 246         int last_boosted_vcpu;
 247         struct list_head vm_list;
 248         struct mutex lock;
 249         struct kvm_io_bus *buses[KVM_NR_BUSES];
 250 #ifdef CONFIG_HAVE_KVM_EVENTFD
 251         struct {
 252                 spinlock_t        lock;
 253                 struct list_head  items;
 254         } irqfds;
 255         struct list_head ioeventfds;
 256 #endif
 257         struct kvm_vm_stat stat;
 258         struct kvm_arch arch;
 259         atomic_t users_count;
 260 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 261         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 262         spinlock_t ring_lock;
 263         struct list_head coalesced_zones;
 264 #endif
 265
 266         struct mutex irq_lock;
 267 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 268         /*
 269          * Update side is protected by irq_lock and,
 270          * if configured, irqfds.lock.
 271          */
 272         struct kvm_irq_routing_table __rcu *irq_routing;
 273         struct hlist_head mask_notifier_list;
 274         struct hlist_head irq_ack_notifier_list;
 275 #endif
 276
 277 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 278         struct mmu_notifier mmu_notifier;
 279         unsigned long mmu_notifier_seq;
 280         long mmu_notifier_count;
 281 #endif
 282         long tlbs_dirty;
 283 };
 284
 285 /* The guest did something we don't support. */
 286 #define pr_unimpl(vcpu, fmt, ...)                                       \
 287         pr_err_ratelimited("kvm: %i: cpu%i " fmt,                       \
 288                            current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__)
 289
 290 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 291 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 292
 293 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 294 {
 295         smp_rmb();
 296         return kvm->vcpus[i];
 297 }
 298
 299 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
 300         for (idx = 0; \
 301              idx < atomic_read(&kvm->online_vcpus) && \
 302              (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
 303              idx++)
 304
 305 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 306 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 307
 308 void vcpu_load(struct kvm_vcpu *vcpu);
 309 void vcpu_put(struct kvm_vcpu *vcpu);
 310
 311 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
 312                   struct module *module);
 313 void kvm_exit(void);
 314
 315 void kvm_get_kvm(struct kvm *kvm);
 316 void kvm_put_kvm(struct kvm *kvm);
 317
 318 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
 319 {
 320         return rcu_dereference_check(kvm->memslots,
 321                         srcu_read_lock_held(&kvm->srcu)
 322                         || lockdep_is_held(&kvm->slots_lock));
 323 }
 324
 325 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 326 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 327 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 328
 329 extern struct page *bad_page;
 330 extern struct page *fault_page;
 331
 332 extern pfn_t bad_pfn;
 333 extern pfn_t fault_pfn;
 334
 335 int is_error_page(struct page *page);
 336 int is_error_pfn(pfn_t pfn);
 337 int is_hwpoison_pfn(pfn_t pfn);
 338 int is_fault_pfn(pfn_t pfn);
 339 int is_noslot_pfn(pfn_t pfn);
 340 int is_invalid_pfn(pfn_t pfn);
 341 int kvm_is_error_hva(unsigned long addr);
 342 int kvm_set_memory_region(struct kvm *kvm,
 343                           struct kvm_userspace_memory_region *mem,
 344                           int user_alloc);
 345 int __kvm_set_memory_region(struct kvm *kvm,
 346                             struct kvm_userspace_memory_region *mem,
 347                             int user_alloc);
 348 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 349                                 struct kvm_memory_slot *memslot,
 350                                 struct kvm_memory_slot old,
 351                                 struct kvm_userspace_memory_region *mem,
 352                                 int user_alloc);
 353 void kvm_arch_commit_memory_region(struct kvm *kvm,
 354                                 struct kvm_userspace_memory_region *mem,
 355                                 struct kvm_memory_slot old,
 356                                 int user_alloc);
 357 void kvm_disable_largepages(void);
 358 void kvm_arch_flush_shadow(struct kvm *kvm);
 359
 360 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
 361                             int nr_pages);
 362
 363 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 364 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 365 void kvm_release_page_clean(struct page *page);
 366 void kvm_release_page_dirty(struct page *page);
 367 void kvm_set_page_dirty(struct page *page);
 368 void kvm_set_page_accessed(struct page *page);
 369
 370 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
 371 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
 372 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
 373                        bool write_fault, bool *writable);
 374 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 375 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
 376                       bool *writable);
 377 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
 378                          struct kvm_memory_slot *slot, gfn_t gfn);
 379 void kvm_release_pfn_dirty(pfn_t);
 380 void kvm_release_pfn_clean(pfn_t pfn);
 381 void kvm_set_pfn_dirty(pfn_t pfn);
 382 void kvm_set_pfn_accessed(pfn_t pfn);
 383 void kvm_get_pfn(pfn_t pfn);
 384
 385 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 386                         int len);
 387 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 388                           unsigned long len);
 389 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 390 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 391                            void *data, unsigned long len);
 392 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 393                          int offset, int len);
 394 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 395                     unsigned long len);
 396 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 397                            void *data, unsigned long len);
 398 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 399                               gpa_t gpa);
 400 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 401 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 402 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 403 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 404 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
 405 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 406 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
 407                              gfn_t gfn);
 408
 409 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 410 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
 411 void kvm_resched(struct kvm_vcpu *vcpu);
 412 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 413 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 414
 415 void kvm_flush_remote_tlbs(struct kvm *kvm);
 416 void kvm_reload_remote_mmus(struct kvm *kvm);
 417
 418 long kvm_arch_dev_ioctl(struct file *filp,
 419                         unsigned int ioctl, unsigned long arg);
 420 long kvm_arch_vcpu_ioctl(struct file *filp,
 421                          unsigned int ioctl, unsigned long arg);
 422
 423 int kvm_dev_ioctl_check_extension(long ext);
 424
 425 int kvm_get_dirty_log(struct kvm *kvm,
 426                         struct kvm_dirty_log *log, int *is_dirty);
 427 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 428                                 struct kvm_dirty_log *log);
 429
 430 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 431                                    struct
 432                                    kvm_userspace_memory_region *mem,
 433                                    int user_alloc);
 434 long kvm_arch_vm_ioctl(struct file *filp,
 435                        unsigned int ioctl, unsigned long arg);
 436
 437 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 438 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 439
 440 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 441                                     struct kvm_translation *tr);
 442
 443 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 444 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 445 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 446                                   struct kvm_sregs *sregs);
 447 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 448                                   struct kvm_sregs *sregs);
 449 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 450                                     struct kvm_mp_state *mp_state);
 451 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 452                                     struct kvm_mp_state *mp_state);
 453 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 454                                         struct kvm_guest_debug *dbg);
 455 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 456
 457 int kvm_arch_init(void *opaque);
 458 void kvm_arch_exit(void);
 459
 460 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 461 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 462
 463 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 464 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 465 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 466 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 467 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 468 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 469
 470 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 471 int kvm_arch_hardware_enable(void *garbage);
 472 void kvm_arch_hardware_disable(void *garbage);
 473 int kvm_arch_hardware_setup(void);
 474 void kvm_arch_hardware_unsetup(void);
 475 void kvm_arch_check_processor_compat(void *rtn);
 476 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 477
 478 void kvm_free_physmem(struct kvm *kvm);
 479
 480 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
 481 static inline struct kvm *kvm_arch_alloc_vm(void)
 482 {
 483         return kzalloc(sizeof(struct kvm), GFP_KERNEL);
 484 }
 485
 486 static inline void kvm_arch_free_vm(struct kvm *kvm)
 487 {
 488         kfree(kvm);
 489 }
 490 #endif
 491
 492 int kvm_arch_init_vm(struct kvm *kvm);
 493 void kvm_arch_destroy_vm(struct kvm *kvm);
 494 void kvm_free_all_assigned_devices(struct kvm *kvm);
 495 void kvm_arch_sync_events(struct kvm *kvm);
 496
 497 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 498 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 499
 500 int kvm_is_mmio_pfn(pfn_t pfn);
 501
 502 struct kvm_irq_ack_notifier {
 503         struct hlist_node link;
 504         unsigned gsi;
 505         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 506 };
 507
 508 struct kvm_assigned_dev_kernel {
 509         struct kvm_irq_ack_notifier ack_notifier;
 510         struct list_head list;
 511         int assigned_dev_id;
 512         int host_segnr;
 513         int host_busnr;
 514         int host_devfn;
 515         unsigned int entries_nr;
 516         int host_irq;
 517         bool host_irq_disabled;
 518         struct msix_entry *host_msix_entries;
 519         int guest_irq;
 520         struct msix_entry *guest_msix_entries;
 521         unsigned long irq_requested_type;
 522         int irq_source_id;
 523         int flags;
 524         struct pci_dev *dev;
 525         struct kvm *kvm;
 526         spinlock_t intx_lock;
 527         char irq_name[32];
 528         struct pci_saved_state *pci_saved_state;
 529 };
 530
 531 struct kvm_irq_mask_notifier {
 532         void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 533         int irq;
 534         struct hlist_node link;
 535 };
 536
 537 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 538                                     struct kvm_irq_mask_notifier *kimn);
 539 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 540                                       struct kvm_irq_mask_notifier *kimn);
 541 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
 542                              bool mask);
 543
 544 #ifdef __KVM_HAVE_IOAPIC
 545 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
 546                                    union kvm_ioapic_redirect_entry *entry,
 547                                    unsigned long *deliver_bitmask);
 548 #endif
 549 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 550 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
 551                 int irq_source_id, int level);
 552 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 553 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 554                                    struct kvm_irq_ack_notifier *kian);
 555 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 556                                    struct kvm_irq_ack_notifier *kian);
 557 int kvm_request_irq_source_id(struct kvm *kvm);
 558 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 559
 560 /* For vcpu->arch.iommu_flags */
 561 #define KVM_IOMMU_CACHE_COHERENCY       0x1
 562
 563 #ifdef CONFIG_IOMMU_API
 564 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 565 int kvm_iommu_map_guest(struct kvm *kvm);
 566 int kvm_iommu_unmap_guest(struct kvm *kvm);
 567 int kvm_assign_device(struct kvm *kvm,
 568                       struct kvm_assigned_dev_kernel *assigned_dev);
 569 int kvm_deassign_device(struct kvm *kvm,
 570                         struct kvm_assigned_dev_kernel *assigned_dev);
 571 #else /* CONFIG_IOMMU_API */
 572 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 573                                       struct kvm_memory_slot *slot)
 574 {
 575         return 0;
 576 }
 577
 578 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 579 {
 580         return -ENODEV;
 581 }
 582
 583 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 584 {
 585         return 0;
 586 }
 587
 588 static inline int kvm_assign_device(struct kvm *kvm,
 589                 struct kvm_assigned_dev_kernel *assigned_dev)
 590 {
 591         return 0;
 592 }
 593
 594 static inline int kvm_deassign_device(struct kvm *kvm,
 595                 struct kvm_assigned_dev_kernel *assigned_dev)
 596 {
 597         return 0;
 598 }
 599 #endif /* CONFIG_IOMMU_API */
 600
 601 static inline void kvm_guest_enter(void)
 602 {
 603         BUG_ON(preemptible());
 604         account_system_vtime(current);
 605         current->flags |= PF_VCPU;
 606         /* KVM does not hold any references to rcu protected data when it
 607          * switches CPU into a guest mode. In fact switching to a guest mode
 608          * is very similar to exiting to userspase from rcu point of view. In
 609          * addition CPU may stay in a guest mode for quite a long time (up to
 610          * one time slice). Lets treat guest mode as quiescent state, just like
 611          * we do with user-mode execution.
 612          */
 613         rcu_virt_note_context_switch(smp_processor_id());
 614 }
 615
 616 static inline void kvm_guest_exit(void)
 617 {
 618         account_system_vtime(current);
 619         current->flags &= ~PF_VCPU;
 620 }
 621
 622 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
 623 {
 624         return gfn_to_memslot(kvm, gfn)->id;
 625 }
 626
 627 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
 628                                                gfn_t gfn)
 629 {
 630         return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
 631 }
 632
 633 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 634 {
 635         return (gpa_t)gfn << PAGE_SHIFT;
 636 }
 637
 638 static inline gfn_t gpa_to_gfn(gpa_t gpa)
 639 {
 640         return (gfn_t)(gpa >> PAGE_SHIFT);
 641 }
 642
 643 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 644 {
 645         return (hpa_t)pfn << PAGE_SHIFT;
 646 }
 647
 648 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 649 {
 650         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 651 }
 652
 653 enum kvm_stat_kind {
 654         KVM_STAT_VM,
 655         KVM_STAT_VCPU,
 656 };
 657
 658 struct kvm_stats_debugfs_item {
 659         const char *name;
 660         int offset;
 661         enum kvm_stat_kind kind;
 662         struct dentry *dentry;
 663 };
 664 extern struct kvm_stats_debugfs_item debugfs_entries[];
 665 extern struct dentry *kvm_debugfs_dir;
 666
 667 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 668 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 669 {
 670         if (unlikely(vcpu->kvm->mmu_notifier_count))
 671                 return 1;
 672         /*
 673          * Both reads happen under the mmu_lock and both values are
 674          * modified under mmu_lock, so there's no need of smb_rmb()
 675          * here in between, otherwise mmu_notifier_count should be
 676          * read before mmu_notifier_seq, see
 677          * mmu_notifier_invalidate_range_end write side.
 678          */
 679         if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 680                 return 1;
 681         return 0;
 682 }
 683 #endif
 684
 685 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 686
 687 #define KVM_MAX_IRQ_ROUTES 1024
 688
 689 int kvm_setup_default_irq_routing(struct kvm *kvm);
 690 int kvm_set_irq_routing(struct kvm *kvm,
 691                         const struct kvm_irq_routing_entry *entries,
 692                         unsigned nr,
 693                         unsigned flags);
 694 void kvm_free_irq_routing(struct kvm *kvm);
 695
 696 #else
 697
 698 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 699
 700 #endif
 701
 702 #ifdef CONFIG_HAVE_KVM_EVENTFD
 703
 704 void kvm_eventfd_init(struct kvm *kvm);
 705 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
 706 void kvm_irqfd_release(struct kvm *kvm);
 707 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
 708 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 709
 710 #else
 711
 712 static inline void kvm_eventfd_init(struct kvm *kvm) {}
 713
 714 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
 715 {
 716         return -EINVAL;
 717 }
 718
 719 static inline void kvm_irqfd_release(struct kvm *kvm) {}
 720
 721 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 722 static inline void kvm_irq_routing_update(struct kvm *kvm,
 723                                           struct kvm_irq_routing_table *irq_rt)
 724 {
 725         rcu_assign_pointer(kvm->irq_routing, irq_rt);
 726 }
 727 #endif
 728
 729 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
 730 {
 731         return -ENOSYS;
 732 }
 733
 734 #endif /* CONFIG_HAVE_KVM_EVENTFD */
 735
 736 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 737 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
 738 {
 739         return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
 740 }
 741 #endif
 742
 743 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
 744
 745 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 746                                   unsigned long arg);
 747
 748 #else
 749
 750 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 751                                                 unsigned long arg)
 752 {
 753         return -ENOTTY;
 754 }
 755
 756 #endif
 757
 758 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
 759 {
 760         set_bit(req, &vcpu->requests);
 761 }
 762
 763 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
 764 {
 765         if (test_bit(req, &vcpu->requests)) {
 766                 clear_bit(req, &vcpu->requests);
 767                 return true;
 768         } else {
 769                 return false;
 770         }
 771 }
 772
 773 #endif
 774