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/mmu_notifier.h>
  18 #include <linux/preempt.h>
  19 #include <linux/msi.h>
  20 #include <linux/slab.h>
  21 #include <linux/rcupdate.h>
  22 #include <linux/ratelimit.h>
  23 #include <asm/signal.h>
  24
  25 #include <linux/kvm.h>
  26 #include <linux/kvm_para.h>
  27
  28 #include <linux/kvm_types.h>
  29
  30 #include <asm/kvm_host.h>
  31
  32 #ifndef KVM_MMIO_SIZE
  33 #define KVM_MMIO_SIZE 8
  34 #endif
  35
  36 /*
  37  * vcpu->requests bit members
  38  */
  39 #define KVM_REQ_TLB_FLUSH          0
  40 #define KVM_REQ_MIGRATE_TIMER      1
  41 #define KVM_REQ_REPORT_TPR_ACCESS  2
  42 #define KVM_REQ_MMU_RELOAD         3
  43 #define KVM_REQ_TRIPLE_FAULT       4
  44 #define KVM_REQ_PENDING_TIMER      5
  45 #define KVM_REQ_UNHALT             6
  46 #define KVM_REQ_MMU_SYNC           7
  47 #define KVM_REQ_CLOCK_UPDATE       8
  48 #define KVM_REQ_KICK               9
  49 #define KVM_REQ_DEACTIVATE_FPU    10
  50 #define KVM_REQ_EVENT             11
  51 #define KVM_REQ_APF_HALT          12
  52 #define KVM_REQ_STEAL_UPDATE      13
  53 #define KVM_REQ_NMI               14
  54 #define KVM_REQ_IMMEDIATE_EXIT    15
  55
  56 #define KVM_USERSPACE_IRQ_SOURCE_ID     0
  57
  58 struct kvm;
  59 struct kvm_vcpu;
  60 extern struct kmem_cache *kvm_vcpu_cache;
  61
  62 struct kvm_io_range {
  63         gpa_t addr;
  64         int len;
  65         struct kvm_io_device *dev;
  66 };
  67
  68 struct kvm_io_bus {
  69         int                   dev_count;
  70 #define NR_IOBUS_DEVS 300
  71         struct kvm_io_range range[NR_IOBUS_DEVS];
  72 };
  73
  74 enum kvm_bus {
  75         KVM_MMIO_BUS,
  76         KVM_PIO_BUS,
  77         KVM_NR_BUSES
  78 };
  79
  80 int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
  81                      int len, const void *val);
  82 int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
  83                     void *val);
  84 int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
  85                             int len, struct kvm_io_device *dev);
  86 int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
  87                               struct kvm_io_device *dev);
  88
  89 #ifdef CONFIG_KVM_ASYNC_PF
  90 struct kvm_async_pf {
  91         struct work_struct work;
  92         struct list_head link;
  93         struct list_head queue;
  94         struct kvm_vcpu *vcpu;
  95         struct mm_struct *mm;
  96         gva_t gva;
  97         unsigned long addr;
  98         struct kvm_arch_async_pf arch;
  99         struct page *page;
 100         bool done;
 101 };
 102
 103 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
 104 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
 105 int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
 106                        struct kvm_arch_async_pf *arch);
 107 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
 108 #endif
 109
 110 enum {
 111         OUTSIDE_GUEST_MODE,
 112         IN_GUEST_MODE,
 113         EXITING_GUEST_MODE
 114 };
 115
 116 struct kvm_vcpu {
 117         struct kvm *kvm;
 118 #ifdef CONFIG_PREEMPT_NOTIFIERS
 119         struct preempt_notifier preempt_notifier;
 120 #endif
 121         int cpu;
 122         int vcpu_id;
 123         int srcu_idx;
 124         int mode;
 125         unsigned long requests;
 126         unsigned long guest_debug;
 127
 128         struct mutex mutex;
 129         struct kvm_run *run;
 130
 131         int fpu_active;
 132         int guest_fpu_loaded, guest_xcr0_loaded;
 133         wait_queue_head_t wq;
 134         struct pid *pid;
 135         int sigset_active;
 136         sigset_t sigset;
 137         struct kvm_vcpu_stat stat;
 138
 139 #ifdef CONFIG_HAS_IOMEM
 140         int mmio_needed;
 141         int mmio_read_completed;
 142         int mmio_is_write;
 143         int mmio_size;
 144         int mmio_index;
 145         unsigned char mmio_data[KVM_MMIO_SIZE];
 146         gpa_t mmio_phys_addr;
 147 #endif
 148
 149 #ifdef CONFIG_KVM_ASYNC_PF
 150         struct {
 151                 u32 queued;
 152                 struct list_head queue;
 153                 struct list_head done;
 154                 spinlock_t lock;
 155         } async_pf;
 156 #endif
 157
 158         struct kvm_vcpu_arch arch;
 159 };
 160
 161 static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
 162 {
 163         return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
 164 }
 165
 166 /*
 167  * Some of the bitops functions do not support too long bitmaps.
 168  * This number must be determined not to exceed such limits.
 169  */
 170 #define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
 171
 172 struct kvm_lpage_info {
 173         unsigned long rmap_pde;
 174         int write_count;
 175 };
 176
 177 struct kvm_memory_slot {
 178         gfn_t base_gfn;
 179         unsigned long npages;
 180         unsigned long flags;
 181         unsigned long *rmap;
 182         unsigned long *dirty_bitmap;
 183         unsigned long *dirty_bitmap_head;
 184         unsigned long nr_dirty_pages;
 185         struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
 186         unsigned long userspace_addr;
 187         int user_alloc;
 188         int id;
 189 };
 190
 191 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
 192 {
 193         return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
 194 }
 195
 196 struct kvm_kernel_irq_routing_entry {
 197         u32 gsi;
 198         u32 type;
 199         int (*set)(struct kvm_kernel_irq_routing_entry *e,
 200                    struct kvm *kvm, int irq_source_id, int level);
 201         union {
 202                 struct {
 203                         unsigned irqchip;
 204                         unsigned pin;
 205                 } irqchip;
 206                 struct msi_msg msi;
 207         };
 208         struct hlist_node link;
 209 };
 210
 211 #ifdef __KVM_HAVE_IOAPIC
 212
 213 struct kvm_irq_routing_table {
 214         int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
 215         struct kvm_kernel_irq_routing_entry *rt_entries;
 216         u32 nr_rt_entries;
 217         /*
 218          * Array indexed by gsi. Each entry contains list of irq chips
 219          * the gsi is connected to.
 220          */
 221         struct hlist_head map[0];
 222 };
 223
 224 #else
 225
 226 struct kvm_irq_routing_table {};
 227
 228 #endif
 229
 230 struct kvm_memslots {
 231         int nmemslots;
 232         u64 generation;
 233         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 234                                         KVM_PRIVATE_MEM_SLOTS];
 235 };
 236
 237 struct kvm {
 238         spinlock_t mmu_lock;
 239         struct mutex slots_lock;
 240         struct mm_struct *mm; /* userspace tied to this vm */
 241         struct kvm_memslots *memslots;
 242         struct srcu_struct srcu;
 243 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 244         u32 bsp_vcpu_id;
 245         struct kvm_vcpu *bsp_vcpu;
 246 #endif
 247         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 248         atomic_t online_vcpus;
 249         int last_boosted_vcpu;
 250         struct list_head vm_list;
 251         struct mutex lock;
 252         struct kvm_io_bus *buses[KVM_NR_BUSES];
 253 #ifdef CONFIG_HAVE_KVM_EVENTFD
 254         struct {
 255                 spinlock_t        lock;
 256                 struct list_head  items;
 257         } irqfds;
 258         struct list_head ioeventfds;
 259 #endif
 260         struct kvm_vm_stat stat;
 261         struct kvm_arch arch;
 262         atomic_t users_count;
 263 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 264         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 265         spinlock_t ring_lock;
 266         struct list_head coalesced_zones;
 267 #endif
 268
 269         struct mutex irq_lock;
 270 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 271         /*
 272          * Update side is protected by irq_lock and,
 273          * if configured, irqfds.lock.
 274          */
 275         struct kvm_irq_routing_table __rcu *irq_routing;
 276         struct hlist_head mask_notifier_list;
 277         struct hlist_head irq_ack_notifier_list;
 278 #endif
 279
 280 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 281         struct mmu_notifier mmu_notifier;
 282         unsigned long mmu_notifier_seq;
 283         long mmu_notifier_count;
 284 #endif
 285         long tlbs_dirty;
 286 };
 287
 288 /* The guest did something we don't support. */
 289 #define pr_unimpl(vcpu, fmt, ...)                                       \
 290         pr_err_ratelimited("kvm: %i: cpu%i " fmt,                       \
 291                            current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__)
 292
 293 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 294 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 295
 296 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 297 {
 298         smp_rmb();
 299         return kvm->vcpus[i];
 300 }
 301
 302 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
 303         for (idx = 0; \
 304              idx < atomic_read(&kvm->online_vcpus) && \
 305              (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
 306              idx++)
 307
 308 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 309 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 310
 311 void vcpu_load(struct kvm_vcpu *vcpu);
 312 void vcpu_put(struct kvm_vcpu *vcpu);
 313
 314 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
 315                   struct module *module);
 316 void kvm_exit(void);
 317
 318 void kvm_get_kvm(struct kvm *kvm);
 319 void kvm_put_kvm(struct kvm *kvm);
 320
 321 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
 322 {
 323         return rcu_dereference_check(kvm->memslots,
 324                         srcu_read_lock_held(&kvm->srcu)
 325                         || lockdep_is_held(&kvm->slots_lock));
 326 }
 327
 328 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 329 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 330 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 331
 332 extern struct page *bad_page;
 333 extern struct page *fault_page;
 334
 335 extern pfn_t bad_pfn;
 336 extern pfn_t fault_pfn;
 337
 338 int is_error_page(struct page *page);
 339 int is_error_pfn(pfn_t pfn);
 340 int is_hwpoison_pfn(pfn_t pfn);
 341 int is_fault_pfn(pfn_t pfn);
 342 int is_noslot_pfn(pfn_t pfn);
 343 int is_invalid_pfn(pfn_t pfn);
 344 int kvm_is_error_hva(unsigned long addr);
 345 int kvm_set_memory_region(struct kvm *kvm,
 346                           struct kvm_userspace_memory_region *mem,
 347                           int user_alloc);
 348 int __kvm_set_memory_region(struct kvm *kvm,
 349                             struct kvm_userspace_memory_region *mem,
 350                             int user_alloc);
 351 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 352                                 struct kvm_memory_slot *memslot,
 353                                 struct kvm_memory_slot old,
 354                                 struct kvm_userspace_memory_region *mem,
 355                                 int user_alloc);
 356 void kvm_arch_commit_memory_region(struct kvm *kvm,
 357                                 struct kvm_userspace_memory_region *mem,
 358                                 struct kvm_memory_slot old,
 359                                 int user_alloc);
 360 void kvm_disable_largepages(void);
 361 void kvm_arch_flush_shadow(struct kvm *kvm);
 362
 363 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
 364                             int nr_pages);
 365
 366 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 367 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 368 void kvm_release_page_clean(struct page *page);
 369 void kvm_release_page_dirty(struct page *page);
 370 void kvm_set_page_dirty(struct page *page);
 371 void kvm_set_page_accessed(struct page *page);
 372
 373 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
 374 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
 375 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
 376                        bool write_fault, bool *writable);
 377 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 378 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
 379                       bool *writable);
 380 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
 381                          struct kvm_memory_slot *slot, gfn_t gfn);
 382 void kvm_release_pfn_dirty(pfn_t);
 383 void kvm_release_pfn_clean(pfn_t pfn);
 384 void kvm_set_pfn_dirty(pfn_t pfn);
 385 void kvm_set_pfn_accessed(pfn_t pfn);
 386 void kvm_get_pfn(pfn_t pfn);
 387
 388 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 389                         int len);
 390 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 391                           unsigned long len);
 392 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 393 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 394                            void *data, unsigned long len);
 395 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 396                          int offset, int len);
 397 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 398                     unsigned long len);
 399 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 400                            void *data, unsigned long len);
 401 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 402                               gpa_t gpa);
 403 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 404 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 405 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 406 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 407 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
 408 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 409 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
 410                              gfn_t gfn);
 411
 412 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 413 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
 414 void kvm_resched(struct kvm_vcpu *vcpu);
 415 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 416 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 417
 418 void kvm_flush_remote_tlbs(struct kvm *kvm);
 419 void kvm_reload_remote_mmus(struct kvm *kvm);
 420
 421 long kvm_arch_dev_ioctl(struct file *filp,
 422                         unsigned int ioctl, unsigned long arg);
 423 long kvm_arch_vcpu_ioctl(struct file *filp,
 424                          unsigned int ioctl, unsigned long arg);
 425
 426 int kvm_dev_ioctl_check_extension(long ext);
 427
 428 int kvm_get_dirty_log(struct kvm *kvm,
 429                         struct kvm_dirty_log *log, int *is_dirty);
 430 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 431                                 struct kvm_dirty_log *log);
 432
 433 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 434                                    struct
 435                                    kvm_userspace_memory_region *mem,
 436                                    int user_alloc);
 437 long kvm_arch_vm_ioctl(struct file *filp,
 438                        unsigned int ioctl, unsigned long arg);
 439
 440 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 441 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 442
 443 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 444                                     struct kvm_translation *tr);
 445
 446 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 447 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 448 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 449                                   struct kvm_sregs *sregs);
 450 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 451                                   struct kvm_sregs *sregs);
 452 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 453                                     struct kvm_mp_state *mp_state);
 454 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 455                                     struct kvm_mp_state *mp_state);
 456 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 457                                         struct kvm_guest_debug *dbg);
 458 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 459
 460 int kvm_arch_init(void *opaque);
 461 void kvm_arch_exit(void);
 462
 463 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 464 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 465
 466 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 467 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 468 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 469 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 470 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 471 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 472
 473 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 474 int kvm_arch_hardware_enable(void *garbage);
 475 void kvm_arch_hardware_disable(void *garbage);
 476 int kvm_arch_hardware_setup(void);
 477 void kvm_arch_hardware_unsetup(void);
 478 void kvm_arch_check_processor_compat(void *rtn);
 479 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 480
 481 void kvm_free_physmem(struct kvm *kvm);
 482
 483 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
 484 static inline struct kvm *kvm_arch_alloc_vm(void)
 485 {
 486         return kzalloc(sizeof(struct kvm), GFP_KERNEL);
 487 }
 488
 489 static inline void kvm_arch_free_vm(struct kvm *kvm)
 490 {
 491         kfree(kvm);
 492 }
 493 #endif
 494
 495 int kvm_arch_init_vm(struct kvm *kvm);
 496 void kvm_arch_destroy_vm(struct kvm *kvm);
 497 void kvm_free_all_assigned_devices(struct kvm *kvm);
 498 void kvm_arch_sync_events(struct kvm *kvm);
 499
 500 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 501 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 502
 503 int kvm_is_mmio_pfn(pfn_t pfn);
 504
 505 struct kvm_irq_ack_notifier {
 506         struct hlist_node link;
 507         unsigned gsi;
 508         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 509 };
 510
 511 struct kvm_assigned_dev_kernel {
 512         struct kvm_irq_ack_notifier ack_notifier;
 513         struct list_head list;
 514         int assigned_dev_id;
 515         int host_segnr;
 516         int host_busnr;
 517         int host_devfn;
 518         unsigned int entries_nr;
 519         int host_irq;
 520         bool host_irq_disabled;
 521         struct msix_entry *host_msix_entries;
 522         int guest_irq;
 523         struct msix_entry *guest_msix_entries;
 524         unsigned long irq_requested_type;
 525         int irq_source_id;
 526         int flags;
 527         struct pci_dev *dev;
 528         struct kvm *kvm;
 529         spinlock_t intx_lock;
 530         char irq_name[32];
 531         struct pci_saved_state *pci_saved_state;
 532 };
 533
 534 struct kvm_irq_mask_notifier {
 535         void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 536         int irq;
 537         struct hlist_node link;
 538 };
 539
 540 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 541                                     struct kvm_irq_mask_notifier *kimn);
 542 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 543                                       struct kvm_irq_mask_notifier *kimn);
 544 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
 545                              bool mask);
 546
 547 #ifdef __KVM_HAVE_IOAPIC
 548 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
 549                                    union kvm_ioapic_redirect_entry *entry,
 550                                    unsigned long *deliver_bitmask);
 551 #endif
 552 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 553 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
 554                 int irq_source_id, int level);
 555 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 556 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 557                                    struct kvm_irq_ack_notifier *kian);
 558 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 559                                    struct kvm_irq_ack_notifier *kian);
 560 int kvm_request_irq_source_id(struct kvm *kvm);
 561 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 562
 563 /* For vcpu->arch.iommu_flags */
 564 #define KVM_IOMMU_CACHE_COHERENCY       0x1
 565
 566 #ifdef CONFIG_IOMMU_API
 567 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 568 int kvm_iommu_map_guest(struct kvm *kvm);
 569 int kvm_iommu_unmap_guest(struct kvm *kvm);
 570 int kvm_assign_device(struct kvm *kvm,
 571                       struct kvm_assigned_dev_kernel *assigned_dev);
 572 int kvm_deassign_device(struct kvm *kvm,
 573                         struct kvm_assigned_dev_kernel *assigned_dev);
 574 #else /* CONFIG_IOMMU_API */
 575 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 576                                       struct kvm_memory_slot *slot)
 577 {
 578         return 0;
 579 }
 580
 581 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 582 {
 583         return -ENODEV;
 584 }
 585
 586 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 587 {
 588         return 0;
 589 }
 590
 591 static inline int kvm_assign_device(struct kvm *kvm,
 592                 struct kvm_assigned_dev_kernel *assigned_dev)
 593 {
 594         return 0;
 595 }
 596
 597 static inline int kvm_deassign_device(struct kvm *kvm,
 598                 struct kvm_assigned_dev_kernel *assigned_dev)
 599 {
 600         return 0;
 601 }
 602 #endif /* CONFIG_IOMMU_API */
 603
 604 static inline void kvm_guest_enter(void)
 605 {
 606         BUG_ON(preemptible());
 607         account_system_vtime(current);
 608         current->flags |= PF_VCPU;
 609         /* KVM does not hold any references to rcu protected data when it
 610          * switches CPU into a guest mode. In fact switching to a guest mode
 611          * is very similar to exiting to userspase from rcu point of view. In
 612          * addition CPU may stay in a guest mode for quite a long time (up to
 613          * one time slice). Lets treat guest mode as quiescent state, just like
 614          * we do with user-mode execution.
 615          */
 616         rcu_virt_note_context_switch(smp_processor_id());
 617 }
 618
 619 static inline void kvm_guest_exit(void)
 620 {
 621         account_system_vtime(current);
 622         current->flags &= ~PF_VCPU;
 623 }
 624
 625 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
 626 {
 627         return gfn_to_memslot(kvm, gfn)->id;
 628 }
 629
 630 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
 631                                                gfn_t gfn)
 632 {
 633         return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
 634 }
 635
 636 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 637 {
 638         return (gpa_t)gfn << PAGE_SHIFT;
 639 }
 640
 641 static inline gfn_t gpa_to_gfn(gpa_t gpa)
 642 {
 643         return (gfn_t)(gpa >> PAGE_SHIFT);
 644 }
 645
 646 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 647 {
 648         return (hpa_t)pfn << PAGE_SHIFT;
 649 }
 650
 651 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 652 {
 653         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 654 }
 655
 656 enum kvm_stat_kind {
 657         KVM_STAT_VM,
 658         KVM_STAT_VCPU,
 659 };
 660
 661 struct kvm_stats_debugfs_item {
 662         const char *name;
 663         int offset;
 664         enum kvm_stat_kind kind;
 665         struct dentry *dentry;
 666 };
 667 extern struct kvm_stats_debugfs_item debugfs_entries[];
 668 extern struct dentry *kvm_debugfs_dir;
 669
 670 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 671 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 672 {
 673         if (unlikely(vcpu->kvm->mmu_notifier_count))
 674                 return 1;
 675         /*
 676          * Both reads happen under the mmu_lock and both values are
 677          * modified under mmu_lock, so there's no need of smb_rmb()
 678          * here in between, otherwise mmu_notifier_count should be
 679          * read before mmu_notifier_seq, see
 680          * mmu_notifier_invalidate_range_end write side.
 681          */
 682         if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 683                 return 1;
 684         return 0;
 685 }
 686 #endif
 687
 688 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 689
 690 #define KVM_MAX_IRQ_ROUTES 1024
 691
 692 int kvm_setup_default_irq_routing(struct kvm *kvm);
 693 int kvm_set_irq_routing(struct kvm *kvm,
 694                         const struct kvm_irq_routing_entry *entries,
 695                         unsigned nr,
 696                         unsigned flags);
 697 void kvm_free_irq_routing(struct kvm *kvm);
 698
 699 #else
 700
 701 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 702
 703 #endif
 704
 705 #ifdef CONFIG_HAVE_KVM_EVENTFD
 706
 707 void kvm_eventfd_init(struct kvm *kvm);
 708 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
 709 void kvm_irqfd_release(struct kvm *kvm);
 710 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
 711 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 712
 713 #else
 714
 715 static inline void kvm_eventfd_init(struct kvm *kvm) {}
 716
 717 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
 718 {
 719         return -EINVAL;
 720 }
 721
 722 static inline void kvm_irqfd_release(struct kvm *kvm) {}
 723
 724 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 725 static inline void kvm_irq_routing_update(struct kvm *kvm,
 726                                           struct kvm_irq_routing_table *irq_rt)
 727 {
 728         rcu_assign_pointer(kvm->irq_routing, irq_rt);
 729 }
 730 #endif
 731
 732 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
 733 {
 734         return -ENOSYS;
 735 }
 736
 737 #endif /* CONFIG_HAVE_KVM_EVENTFD */
 738
 739 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 740 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
 741 {
 742         return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
 743 }
 744 #endif
 745
 746 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
 747
 748 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 749                                   unsigned long arg);
 750
 751 #else
 752
 753 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 754                                                 unsigned long arg)
 755 {
 756         return -ENOTTY;
 757 }
 758
 759 #endif
 760
 761 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
 762 {
 763         set_bit(req, &vcpu->requests);
 764 }
 765
 766 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
 767 {
 768         if (test_bit(req, &vcpu->requests)) {
 769                 clear_bit(req, &vcpu->requests);
 770                 return true;
 771         } else {
 772                 return false;
 773         }
 774 }
 775
 776 #endif
 777