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         struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
 185         unsigned long userspace_addr;
 186         int user_alloc;
 187         int id;
 188 };
 189
 190 static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
 191 {
 192         return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
 193 }
 194
 195 struct kvm_kernel_irq_routing_entry {
 196         u32 gsi;
 197         u32 type;
 198         int (*set)(struct kvm_kernel_irq_routing_entry *e,
 199                    struct kvm *kvm, int irq_source_id, int level);
 200         union {
 201                 struct {
 202                         unsigned irqchip;
 203                         unsigned pin;
 204                 } irqchip;
 205                 struct msi_msg msi;
 206         };
 207         struct hlist_node link;
 208 };
 209
 210 #ifdef __KVM_HAVE_IOAPIC
 211
 212 struct kvm_irq_routing_table {
 213         int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
 214         struct kvm_kernel_irq_routing_entry *rt_entries;
 215         u32 nr_rt_entries;
 216         /*
 217          * Array indexed by gsi. Each entry contains list of irq chips
 218          * the gsi is connected to.
 219          */
 220         struct hlist_head map[0];
 221 };
 222
 223 #else
 224
 225 struct kvm_irq_routing_table {};
 226
 227 #endif
 228
 229 struct kvm_memslots {
 230         int nmemslots;
 231         u64 generation;
 232         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 233                                         KVM_PRIVATE_MEM_SLOTS];
 234 };
 235
 236 struct kvm {
 237         spinlock_t mmu_lock;
 238         struct mutex slots_lock;
 239         struct mm_struct *mm; /* userspace tied to this vm */
 240         struct kvm_memslots *memslots;
 241         struct srcu_struct srcu;
 242 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 243         u32 bsp_vcpu_id;
 244         struct kvm_vcpu *bsp_vcpu;
 245 #endif
 246         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 247         atomic_t online_vcpus;
 248         int last_boosted_vcpu;
 249         struct list_head vm_list;
 250         struct mutex lock;
 251         struct kvm_io_bus *buses[KVM_NR_BUSES];
 252 #ifdef CONFIG_HAVE_KVM_EVENTFD
 253         struct {
 254                 spinlock_t        lock;
 255                 struct list_head  items;
 256         } irqfds;
 257         struct list_head ioeventfds;
 258 #endif
 259         struct kvm_vm_stat stat;
 260         struct kvm_arch arch;
 261         atomic_t users_count;
 262 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 263         struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 264         spinlock_t ring_lock;
 265         struct list_head coalesced_zones;
 266 #endif
 267
 268         struct mutex irq_lock;
 269 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 270         /*
 271          * Update side is protected by irq_lock and,
 272          * if configured, irqfds.lock.
 273          */
 274         struct kvm_irq_routing_table __rcu *irq_routing;
 275         struct hlist_head mask_notifier_list;
 276         struct hlist_head irq_ack_notifier_list;
 277 #endif
 278
 279 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 280         struct mmu_notifier mmu_notifier;
 281         unsigned long mmu_notifier_seq;
 282         long mmu_notifier_count;
 283 #endif
 284         long tlbs_dirty;
 285 };
 286
 287 /* The guest did something we don't support. */
 288 #define pr_unimpl(vcpu, fmt, ...)                                       \
 289         pr_err_ratelimited("kvm: %i: cpu%i " fmt,                       \
 290                            current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__)
 291
 292 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 293 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 294
 295 static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 296 {
 297         smp_rmb();
 298         return kvm->vcpus[i];
 299 }
 300
 301 #define kvm_for_each_vcpu(idx, vcpup, kvm) \
 302         for (idx = 0; \
 303              idx < atomic_read(&kvm->online_vcpus) && \
 304              (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
 305              idx++)
 306
 307 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 308 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 309
 310 void vcpu_load(struct kvm_vcpu *vcpu);
 311 void vcpu_put(struct kvm_vcpu *vcpu);
 312
 313 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
 314                   struct module *module);
 315 void kvm_exit(void);
 316
 317 void kvm_get_kvm(struct kvm *kvm);
 318 void kvm_put_kvm(struct kvm *kvm);
 319
 320 static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
 321 {
 322         return rcu_dereference_check(kvm->memslots,
 323                         srcu_read_lock_held(&kvm->srcu)
 324                         || lockdep_is_held(&kvm->slots_lock));
 325 }
 326
 327 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 328 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 329 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 330
 331 extern struct page *bad_page;
 332 extern struct page *fault_page;
 333
 334 extern pfn_t bad_pfn;
 335 extern pfn_t fault_pfn;
 336
 337 int is_error_page(struct page *page);
 338 int is_error_pfn(pfn_t pfn);
 339 int is_hwpoison_pfn(pfn_t pfn);
 340 int is_fault_pfn(pfn_t pfn);
 341 int is_noslot_pfn(pfn_t pfn);
 342 int is_invalid_pfn(pfn_t pfn);
 343 int kvm_is_error_hva(unsigned long addr);
 344 int kvm_set_memory_region(struct kvm *kvm,
 345                           struct kvm_userspace_memory_region *mem,
 346                           int user_alloc);
 347 int __kvm_set_memory_region(struct kvm *kvm,
 348                             struct kvm_userspace_memory_region *mem,
 349                             int user_alloc);
 350 int kvm_arch_prepare_memory_region(struct kvm *kvm,
 351                                 struct kvm_memory_slot *memslot,
 352                                 struct kvm_memory_slot old,
 353                                 struct kvm_userspace_memory_region *mem,
 354                                 int user_alloc);
 355 void kvm_arch_commit_memory_region(struct kvm *kvm,
 356                                 struct kvm_userspace_memory_region *mem,
 357                                 struct kvm_memory_slot old,
 358                                 int user_alloc);
 359 void kvm_disable_largepages(void);
 360 void kvm_arch_flush_shadow(struct kvm *kvm);
 361
 362 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
 363                             int nr_pages);
 364
 365 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 366 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 367 void kvm_release_page_clean(struct page *page);
 368 void kvm_release_page_dirty(struct page *page);
 369 void kvm_set_page_dirty(struct page *page);
 370 void kvm_set_page_accessed(struct page *page);
 371
 372 pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
 373 pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
 374 pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
 375                        bool write_fault, bool *writable);
 376 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 377 pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
 378                       bool *writable);
 379 pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
 380                          struct kvm_memory_slot *slot, gfn_t gfn);
 381 void kvm_release_pfn_dirty(pfn_t);
 382 void kvm_release_pfn_clean(pfn_t pfn);
 383 void kvm_set_pfn_dirty(pfn_t pfn);
 384 void kvm_set_pfn_accessed(pfn_t pfn);
 385 void kvm_get_pfn(pfn_t pfn);
 386
 387 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 388                         int len);
 389 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 390                           unsigned long len);
 391 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 392 int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 393                            void *data, unsigned long len);
 394 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 395                          int offset, int len);
 396 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 397                     unsigned long len);
 398 int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 399                            void *data, unsigned long len);
 400 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 401                               gpa_t gpa);
 402 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 403 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 404 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 405 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 406 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
 407 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 408 void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
 409                              gfn_t gfn);
 410
 411 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 412 void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
 413 void kvm_resched(struct kvm_vcpu *vcpu);
 414 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 415 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 416
 417 void kvm_flush_remote_tlbs(struct kvm *kvm);
 418 void kvm_reload_remote_mmus(struct kvm *kvm);
 419
 420 long kvm_arch_dev_ioctl(struct file *filp,
 421                         unsigned int ioctl, unsigned long arg);
 422 long kvm_arch_vcpu_ioctl(struct file *filp,
 423                          unsigned int ioctl, unsigned long arg);
 424
 425 int kvm_dev_ioctl_check_extension(long ext);
 426
 427 int kvm_get_dirty_log(struct kvm *kvm,
 428                         struct kvm_dirty_log *log, int *is_dirty);
 429 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 430                                 struct kvm_dirty_log *log);
 431
 432 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 433                                    struct
 434                                    kvm_userspace_memory_region *mem,
 435                                    int user_alloc);
 436 long kvm_arch_vm_ioctl(struct file *filp,
 437                        unsigned int ioctl, unsigned long arg);
 438
 439 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 440 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 441
 442 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 443                                     struct kvm_translation *tr);
 444
 445 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 446 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 447 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 448                                   struct kvm_sregs *sregs);
 449 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 450                                   struct kvm_sregs *sregs);
 451 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 452                                     struct kvm_mp_state *mp_state);
 453 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 454                                     struct kvm_mp_state *mp_state);
 455 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 456                                         struct kvm_guest_debug *dbg);
 457 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 458
 459 int kvm_arch_init(void *opaque);
 460 void kvm_arch_exit(void);
 461
 462 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 463 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 464
 465 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 466 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 467 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 468 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 469 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 470 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 471
 472 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 473 int kvm_arch_hardware_enable(void *garbage);
 474 void kvm_arch_hardware_disable(void *garbage);
 475 int kvm_arch_hardware_setup(void);
 476 void kvm_arch_hardware_unsetup(void);
 477 void kvm_arch_check_processor_compat(void *rtn);
 478 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 479
 480 void kvm_free_physmem(struct kvm *kvm);
 481
 482 #ifndef __KVM_HAVE_ARCH_VM_ALLOC
 483 static inline struct kvm *kvm_arch_alloc_vm(void)
 484 {
 485         return kzalloc(sizeof(struct kvm), GFP_KERNEL);
 486 }
 487
 488 static inline void kvm_arch_free_vm(struct kvm *kvm)
 489 {
 490         kfree(kvm);
 491 }
 492 #endif
 493
 494 int kvm_arch_init_vm(struct kvm *kvm);
 495 void kvm_arch_destroy_vm(struct kvm *kvm);
 496 void kvm_free_all_assigned_devices(struct kvm *kvm);
 497 void kvm_arch_sync_events(struct kvm *kvm);
 498
 499 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 500 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 501
 502 int kvm_is_mmio_pfn(pfn_t pfn);
 503
 504 struct kvm_irq_ack_notifier {
 505         struct hlist_node link;
 506         unsigned gsi;
 507         void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 508 };
 509
 510 struct kvm_assigned_dev_kernel {
 511         struct kvm_irq_ack_notifier ack_notifier;
 512         struct list_head list;
 513         int assigned_dev_id;
 514         int host_segnr;
 515         int host_busnr;
 516         int host_devfn;
 517         unsigned int entries_nr;
 518         int host_irq;
 519         bool host_irq_disabled;
 520         struct msix_entry *host_msix_entries;
 521         int guest_irq;
 522         struct msix_entry *guest_msix_entries;
 523         unsigned long irq_requested_type;
 524         int irq_source_id;
 525         int flags;
 526         struct pci_dev *dev;
 527         struct kvm *kvm;
 528         spinlock_t intx_lock;
 529         char irq_name[32];
 530         struct pci_saved_state *pci_saved_state;
 531 };
 532
 533 struct kvm_irq_mask_notifier {
 534         void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 535         int irq;
 536         struct hlist_node link;
 537 };
 538
 539 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 540                                     struct kvm_irq_mask_notifier *kimn);
 541 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 542                                       struct kvm_irq_mask_notifier *kimn);
 543 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
 544                              bool mask);
 545
 546 #ifdef __KVM_HAVE_IOAPIC
 547 void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
 548                                    union kvm_ioapic_redirect_entry *entry,
 549                                    unsigned long *deliver_bitmask);
 550 #endif
 551 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 552 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
 553                 int irq_source_id, int level);
 554 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 555 void kvm_register_irq_ack_notifier(struct kvm *kvm,
 556                                    struct kvm_irq_ack_notifier *kian);
 557 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 558                                    struct kvm_irq_ack_notifier *kian);
 559 int kvm_request_irq_source_id(struct kvm *kvm);
 560 void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 561
 562 /* For vcpu->arch.iommu_flags */
 563 #define KVM_IOMMU_CACHE_COHERENCY       0x1
 564
 565 #ifdef CONFIG_IOMMU_API
 566 int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 567 int kvm_iommu_map_guest(struct kvm *kvm);
 568 int kvm_iommu_unmap_guest(struct kvm *kvm);
 569 int kvm_assign_device(struct kvm *kvm,
 570                       struct kvm_assigned_dev_kernel *assigned_dev);
 571 int kvm_deassign_device(struct kvm *kvm,
 572                         struct kvm_assigned_dev_kernel *assigned_dev);
 573 #else /* CONFIG_IOMMU_API */
 574 static inline int kvm_iommu_map_pages(struct kvm *kvm,
 575                                       struct kvm_memory_slot *slot)
 576 {
 577         return 0;
 578 }
 579
 580 static inline int kvm_iommu_map_guest(struct kvm *kvm)
 581 {
 582         return -ENODEV;
 583 }
 584
 585 static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 586 {
 587         return 0;
 588 }
 589
 590 static inline int kvm_assign_device(struct kvm *kvm,
 591                 struct kvm_assigned_dev_kernel *assigned_dev)
 592 {
 593         return 0;
 594 }
 595
 596 static inline int kvm_deassign_device(struct kvm *kvm,
 597                 struct kvm_assigned_dev_kernel *assigned_dev)
 598 {
 599         return 0;
 600 }
 601 #endif /* CONFIG_IOMMU_API */
 602
 603 static inline void kvm_guest_enter(void)
 604 {
 605         BUG_ON(preemptible());
 606         account_system_vtime(current);
 607         current->flags |= PF_VCPU;
 608         /* KVM does not hold any references to rcu protected data when it
 609          * switches CPU into a guest mode. In fact switching to a guest mode
 610          * is very similar to exiting to userspase from rcu point of view. In
 611          * addition CPU may stay in a guest mode for quite a long time (up to
 612          * one time slice). Lets treat guest mode as quiescent state, just like
 613          * we do with user-mode execution.
 614          */
 615         rcu_virt_note_context_switch(smp_processor_id());
 616 }
 617
 618 static inline void kvm_guest_exit(void)
 619 {
 620         account_system_vtime(current);
 621         current->flags &= ~PF_VCPU;
 622 }
 623
 624 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
 625 {
 626         return gfn_to_memslot(kvm, gfn)->id;
 627 }
 628
 629 static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
 630                                                gfn_t gfn)
 631 {
 632         return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
 633 }
 634
 635 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 636 {
 637         return (gpa_t)gfn << PAGE_SHIFT;
 638 }
 639
 640 static inline gfn_t gpa_to_gfn(gpa_t gpa)
 641 {
 642         return (gfn_t)(gpa >> PAGE_SHIFT);
 643 }
 644
 645 static inline hpa_t pfn_to_hpa(pfn_t pfn)
 646 {
 647         return (hpa_t)pfn << PAGE_SHIFT;
 648 }
 649
 650 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 651 {
 652         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 653 }
 654
 655 enum kvm_stat_kind {
 656         KVM_STAT_VM,
 657         KVM_STAT_VCPU,
 658 };
 659
 660 struct kvm_stats_debugfs_item {
 661         const char *name;
 662         int offset;
 663         enum kvm_stat_kind kind;
 664         struct dentry *dentry;
 665 };
 666 extern struct kvm_stats_debugfs_item debugfs_entries[];
 667 extern struct dentry *kvm_debugfs_dir;
 668
 669 #ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 670 static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 671 {
 672         if (unlikely(vcpu->kvm->mmu_notifier_count))
 673                 return 1;
 674         /*
 675          * Both reads happen under the mmu_lock and both values are
 676          * modified under mmu_lock, so there's no need of smb_rmb()
 677          * here in between, otherwise mmu_notifier_count should be
 678          * read before mmu_notifier_seq, see
 679          * mmu_notifier_invalidate_range_end write side.
 680          */
 681         if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 682                 return 1;
 683         return 0;
 684 }
 685 #endif
 686
 687 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 688
 689 #define KVM_MAX_IRQ_ROUTES 1024
 690
 691 int kvm_setup_default_irq_routing(struct kvm *kvm);
 692 int kvm_set_irq_routing(struct kvm *kvm,
 693                         const struct kvm_irq_routing_entry *entries,
 694                         unsigned nr,
 695                         unsigned flags);
 696 void kvm_free_irq_routing(struct kvm *kvm);
 697
 698 #else
 699
 700 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 701
 702 #endif
 703
 704 #ifdef CONFIG_HAVE_KVM_EVENTFD
 705
 706 void kvm_eventfd_init(struct kvm *kvm);
 707 int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
 708 void kvm_irqfd_release(struct kvm *kvm);
 709 void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
 710 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 711
 712 #else
 713
 714 static inline void kvm_eventfd_init(struct kvm *kvm) {}
 715
 716 static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
 717 {
 718         return -EINVAL;
 719 }
 720
 721 static inline void kvm_irqfd_release(struct kvm *kvm) {}
 722
 723 #ifdef CONFIG_HAVE_KVM_IRQCHIP
 724 static inline void kvm_irq_routing_update(struct kvm *kvm,
 725                                           struct kvm_irq_routing_table *irq_rt)
 726 {
 727         rcu_assign_pointer(kvm->irq_routing, irq_rt);
 728 }
 729 #endif
 730
 731 static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
 732 {
 733         return -ENOSYS;
 734 }
 735
 736 #endif /* CONFIG_HAVE_KVM_EVENTFD */
 737
 738 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
 739 static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
 740 {
 741         return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
 742 }
 743 #endif
 744
 745 #ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
 746
 747 long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 748                                   unsigned long arg);
 749
 750 #else
 751
 752 static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
 753                                                 unsigned long arg)
 754 {
 755         return -ENOTTY;
 756 }
 757
 758 #endif
 759
 760 static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
 761 {
 762         set_bit(req, &vcpu->requests);
 763 }
 764
 765 static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
 766 {
 767         if (test_bit(req, &vcpu->requests)) {
 768                 clear_bit(req, &vcpu->requests);
 769                 return true;
 770         } else {
 771                 return false;
 772         }
 773 }
 774
 775 #endif
 776