linux/include/linux/kvm_host.h
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   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/bug.h>
  17#include <linux/mm.h>
  18#include <linux/mmu_notifier.h>
  19#include <linux/preempt.h>
  20#include <linux/msi.h>
  21#include <linux/slab.h>
  22#include <linux/rcupdate.h>
  23#include <linux/ratelimit.h>
  24#include <linux/err.h>
  25#include <linux/irqflags.h>
  26#include <asm/signal.h>
  27
  28#include <linux/kvm.h>
  29#include <linux/kvm_para.h>
  30
  31#include <linux/kvm_types.h>
  32
  33#include <asm/kvm_host.h>
  34
  35#ifndef KVM_MMIO_SIZE
  36#define KVM_MMIO_SIZE 8
  37#endif
  38
  39/*
  40 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
  41 * in kvm, other bits are visible for userspace which are defined in
  42 * include/linux/kvm_h.
  43 */
  44#define KVM_MEMSLOT_INVALID     (1UL << 16)
  45
  46/* Two fragments for cross MMIO pages. */
  47#define KVM_MAX_MMIO_FRAGMENTS  2
  48
  49/*
  50 * For the normal pfn, the highest 12 bits should be zero,
  51 * so we can mask bit 62 ~ bit 52  to indicate the error pfn,
  52 * mask bit 63 to indicate the noslot pfn.
  53 */
  54#define KVM_PFN_ERR_MASK        (0x7ffULL << 52)
  55#define KVM_PFN_ERR_NOSLOT_MASK (0xfffULL << 52)
  56#define KVM_PFN_NOSLOT          (0x1ULL << 63)
  57
  58#define KVM_PFN_ERR_FAULT       (KVM_PFN_ERR_MASK)
  59#define KVM_PFN_ERR_HWPOISON    (KVM_PFN_ERR_MASK + 1)
  60#define KVM_PFN_ERR_RO_FAULT    (KVM_PFN_ERR_MASK + 2)
  61
  62/*
  63 * error pfns indicate that the gfn is in slot but faild to
  64 * translate it to pfn on host.
  65 */
  66static inline bool is_error_pfn(pfn_t pfn)
  67{
  68        return !!(pfn & KVM_PFN_ERR_MASK);
  69}
  70
  71/*
  72 * error_noslot pfns indicate that the gfn can not be
  73 * translated to pfn - it is not in slot or failed to
  74 * translate it to pfn.
  75 */
  76static inline bool is_error_noslot_pfn(pfn_t pfn)
  77{
  78        return !!(pfn & KVM_PFN_ERR_NOSLOT_MASK);
  79}
  80
  81/* noslot pfn indicates that the gfn is not in slot. */
  82static inline bool is_noslot_pfn(pfn_t pfn)
  83{
  84        return pfn == KVM_PFN_NOSLOT;
  85}
  86
  87#define KVM_HVA_ERR_BAD         (PAGE_OFFSET)
  88#define KVM_HVA_ERR_RO_BAD      (PAGE_OFFSET + PAGE_SIZE)
  89
  90static inline bool kvm_is_error_hva(unsigned long addr)
  91{
  92        return addr >= PAGE_OFFSET;
  93}
  94
  95#define KVM_ERR_PTR_BAD_PAGE    (ERR_PTR(-ENOENT))
  96
  97static inline bool is_error_page(struct page *page)
  98{
  99        return IS_ERR(page);
 100}
 101
 102/*
 103 * vcpu->requests bit members
 104 */
 105#define KVM_REQ_TLB_FLUSH          0
 106#define KVM_REQ_MIGRATE_TIMER      1
 107#define KVM_REQ_REPORT_TPR_ACCESS  2
 108#define KVM_REQ_MMU_RELOAD         3
 109#define KVM_REQ_TRIPLE_FAULT       4
 110#define KVM_REQ_PENDING_TIMER      5
 111#define KVM_REQ_UNHALT             6
 112#define KVM_REQ_MMU_SYNC           7
 113#define KVM_REQ_CLOCK_UPDATE       8
 114#define KVM_REQ_KICK               9
 115#define KVM_REQ_DEACTIVATE_FPU    10
 116#define KVM_REQ_EVENT             11
 117#define KVM_REQ_APF_HALT          12
 118#define KVM_REQ_STEAL_UPDATE      13
 119#define KVM_REQ_NMI               14
 120#define KVM_REQ_IMMEDIATE_EXIT    15
 121#define KVM_REQ_PMU               16
 122#define KVM_REQ_PMI               17
 123#define KVM_REQ_WATCHDOG          18
 124#define KVM_REQ_MASTERCLOCK_UPDATE 19
 125#define KVM_REQ_MCLOCK_INPROGRESS 20
 126#define KVM_REQ_EPR_EXIT          21
 127#define KVM_REQ_EOIBITMAP         22
 128
 129#define KVM_USERSPACE_IRQ_SOURCE_ID             0
 130#define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID        1
 131
 132struct kvm;
 133struct kvm_vcpu;
 134extern struct kmem_cache *kvm_vcpu_cache;
 135
 136struct kvm_io_range {
 137        gpa_t addr;
 138        int len;
 139        struct kvm_io_device *dev;
 140};
 141
 142#define NR_IOBUS_DEVS 1000
 143
 144struct kvm_io_bus {
 145        int                   dev_count;
 146        struct kvm_io_range range[];
 147};
 148
 149enum kvm_bus {
 150        KVM_MMIO_BUS,
 151        KVM_PIO_BUS,
 152        KVM_NR_BUSES
 153};
 154
 155int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
 156                     int len, const void *val);
 157int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
 158                    void *val);
 159int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
 160                            int len, struct kvm_io_device *dev);
 161int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
 162                              struct kvm_io_device *dev);
 163
 164#ifdef CONFIG_KVM_ASYNC_PF
 165struct kvm_async_pf {
 166        struct work_struct work;
 167        struct list_head link;
 168        struct list_head queue;
 169        struct kvm_vcpu *vcpu;
 170        struct mm_struct *mm;
 171        gva_t gva;
 172        unsigned long addr;
 173        struct kvm_arch_async_pf arch;
 174        struct page *page;
 175        bool done;
 176};
 177
 178void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
 179void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
 180int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
 181                       struct kvm_arch_async_pf *arch);
 182int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
 183#endif
 184
 185enum {
 186        OUTSIDE_GUEST_MODE,
 187        IN_GUEST_MODE,
 188        EXITING_GUEST_MODE,
 189        READING_SHADOW_PAGE_TABLES,
 190};
 191
 192/*
 193 * Sometimes a large or cross-page mmio needs to be broken up into separate
 194 * exits for userspace servicing.
 195 */
 196struct kvm_mmio_fragment {
 197        gpa_t gpa;
 198        void *data;
 199        unsigned len;
 200};
 201
 202struct kvm_vcpu {
 203        struct kvm *kvm;
 204#ifdef CONFIG_PREEMPT_NOTIFIERS
 205        struct preempt_notifier preempt_notifier;
 206#endif
 207        int cpu;
 208        int vcpu_id;
 209        int srcu_idx;
 210        int mode;
 211        unsigned long requests;
 212        unsigned long guest_debug;
 213
 214        struct mutex mutex;
 215        struct kvm_run *run;
 216
 217        int fpu_active;
 218        int guest_fpu_loaded, guest_xcr0_loaded;
 219        wait_queue_head_t wq;
 220        struct pid *pid;
 221        int sigset_active;
 222        sigset_t sigset;
 223        struct kvm_vcpu_stat stat;
 224
 225#ifdef CONFIG_HAS_IOMEM
 226        int mmio_needed;
 227        int mmio_read_completed;
 228        int mmio_is_write;
 229        int mmio_cur_fragment;
 230        int mmio_nr_fragments;
 231        struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
 232#endif
 233
 234#ifdef CONFIG_KVM_ASYNC_PF
 235        struct {
 236                u32 queued;
 237                struct list_head queue;
 238                struct list_head done;
 239                spinlock_t lock;
 240        } async_pf;
 241#endif
 242
 243#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
 244        /*
 245         * Cpu relax intercept or pause loop exit optimization
 246         * in_spin_loop: set when a vcpu does a pause loop exit
 247         *  or cpu relax intercepted.
 248         * dy_eligible: indicates whether vcpu is eligible for directed yield.
 249         */
 250        struct {
 251                bool in_spin_loop;
 252                bool dy_eligible;
 253        } spin_loop;
 254#endif
 255        struct kvm_vcpu_arch arch;
 256};
 257
 258static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
 259{
 260        return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
 261}
 262
 263/*
 264 * Some of the bitops functions do not support too long bitmaps.
 265 * This number must be determined not to exceed such limits.
 266 */
 267#define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
 268
 269struct kvm_memory_slot {
 270        gfn_t base_gfn;
 271        unsigned long npages;
 272        unsigned long *dirty_bitmap;
 273        struct kvm_arch_memory_slot arch;
 274        unsigned long userspace_addr;
 275        u32 flags;
 276        short id;
 277};
 278
 279static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
 280{
 281        return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
 282}
 283
 284struct kvm_kernel_irq_routing_entry {
 285        u32 gsi;
 286        u32 type;
 287        int (*set)(struct kvm_kernel_irq_routing_entry *e,
 288                   struct kvm *kvm, int irq_source_id, int level);
 289        union {
 290                struct {
 291                        unsigned irqchip;
 292                        unsigned pin;
 293                } irqchip;
 294                struct msi_msg msi;
 295        };
 296        struct hlist_node link;
 297};
 298
 299#ifdef __KVM_HAVE_IOAPIC
 300
 301struct kvm_irq_routing_table {
 302        int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
 303        struct kvm_kernel_irq_routing_entry *rt_entries;
 304        u32 nr_rt_entries;
 305        /*
 306         * Array indexed by gsi. Each entry contains list of irq chips
 307         * the gsi is connected to.
 308         */
 309        struct hlist_head map[0];
 310};
 311
 312#else
 313
 314struct kvm_irq_routing_table {};
 315
 316#endif
 317
 318#ifndef KVM_PRIVATE_MEM_SLOTS
 319#define KVM_PRIVATE_MEM_SLOTS 0
 320#endif
 321
 322#ifndef KVM_MEM_SLOTS_NUM
 323#define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)
 324#endif
 325
 326/*
 327 * Note:
 328 * memslots are not sorted by id anymore, please use id_to_memslot()
 329 * to get the memslot by its id.
 330 */
 331struct kvm_memslots {
 332        u64 generation;
 333        struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
 334        /* The mapping table from slot id to the index in memslots[]. */
 335        short id_to_index[KVM_MEM_SLOTS_NUM];
 336};
 337
 338struct kvm {
 339        spinlock_t mmu_lock;
 340        struct mutex slots_lock;
 341        struct mm_struct *mm; /* userspace tied to this vm */
 342        struct kvm_memslots *memslots;
 343        struct srcu_struct srcu;
 344#ifdef CONFIG_KVM_APIC_ARCHITECTURE
 345        u32 bsp_vcpu_id;
 346#endif
 347        struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 348        atomic_t online_vcpus;
 349        int last_boosted_vcpu;
 350        struct list_head vm_list;
 351        struct mutex lock;
 352        struct kvm_io_bus *buses[KVM_NR_BUSES];
 353#ifdef CONFIG_HAVE_KVM_EVENTFD
 354        struct {
 355                spinlock_t        lock;
 356                struct list_head  items;
 357                struct list_head  resampler_list;
 358                struct mutex      resampler_lock;
 359        } irqfds;
 360        struct list_head ioeventfds;
 361#endif
 362        struct kvm_vm_stat stat;
 363        struct kvm_arch arch;
 364        atomic_t users_count;
 365#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 366        struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 367        spinlock_t ring_lock;
 368        struct list_head coalesced_zones;
 369#endif
 370
 371        struct mutex irq_lock;
 372#ifdef CONFIG_HAVE_KVM_IRQCHIP
 373        /*
 374         * Update side is protected by irq_lock and,
 375         * if configured, irqfds.lock.
 376         */
 377        struct kvm_irq_routing_table __rcu *irq_routing;
 378        struct hlist_head mask_notifier_list;
 379        struct hlist_head irq_ack_notifier_list;
 380#endif
 381
 382#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 383        struct mmu_notifier mmu_notifier;
 384        unsigned long mmu_notifier_seq;
 385        long mmu_notifier_count;
 386#endif
 387        long tlbs_dirty;
 388};
 389
 390#define kvm_err(fmt, ...) \
 391        pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
 392#define kvm_info(fmt, ...) \
 393        pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
 394#define kvm_debug(fmt, ...) \
 395        pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
 396#define kvm_pr_unimpl(fmt, ...) \
 397        pr_err_ratelimited("kvm [%i]: " fmt, \
 398                           task_tgid_nr(current), ## __VA_ARGS__)
 399
 400/* The guest did something we don't support. */
 401#define vcpu_unimpl(vcpu, fmt, ...)                                     \
 402        kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
 403
 404static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 405{
 406        smp_rmb();
 407        return kvm->vcpus[i];
 408}
 409
 410#define kvm_for_each_vcpu(idx, vcpup, kvm) \
 411        for (idx = 0; \
 412             idx < atomic_read(&kvm->online_vcpus) && \
 413             (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
 414             idx++)
 415
 416#define kvm_for_each_memslot(memslot, slots)    \
 417        for (memslot = &slots->memslots[0];     \
 418              memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
 419                memslot++)
 420
 421int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 422void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 423
 424int __must_check vcpu_load(struct kvm_vcpu *vcpu);
 425void vcpu_put(struct kvm_vcpu *vcpu);
 426
 427int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
 428                  struct module *module);
 429void kvm_exit(void);
 430
 431void kvm_get_kvm(struct kvm *kvm);
 432void kvm_put_kvm(struct kvm *kvm);
 433void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new,
 434                     u64 last_generation);
 435
 436static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
 437{
 438        return rcu_dereference_check(kvm->memslots,
 439                        srcu_read_lock_held(&kvm->srcu)
 440                        || lockdep_is_held(&kvm->slots_lock));
 441}
 442
 443static inline struct kvm_memory_slot *
 444id_to_memslot(struct kvm_memslots *slots, int id)
 445{
 446        int index = slots->id_to_index[id];
 447        struct kvm_memory_slot *slot;
 448
 449        slot = &slots->memslots[index];
 450
 451        WARN_ON(slot->id != id);
 452        return slot;
 453}
 454
 455int kvm_set_memory_region(struct kvm *kvm,
 456                          struct kvm_userspace_memory_region *mem,
 457                          bool user_alloc);
 458int __kvm_set_memory_region(struct kvm *kvm,
 459                            struct kvm_userspace_memory_region *mem,
 460                            bool user_alloc);
 461void kvm_arch_free_memslot(struct kvm_memory_slot *free,
 462                           struct kvm_memory_slot *dont);
 463int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
 464int kvm_arch_prepare_memory_region(struct kvm *kvm,
 465                                struct kvm_memory_slot *memslot,
 466                                struct kvm_memory_slot old,
 467                                struct kvm_userspace_memory_region *mem,
 468                                bool user_alloc);
 469void kvm_arch_commit_memory_region(struct kvm *kvm,
 470                                struct kvm_userspace_memory_region *mem,
 471                                struct kvm_memory_slot old,
 472                                bool user_alloc);
 473bool kvm_largepages_enabled(void);
 474void kvm_disable_largepages(void);
 475/* flush all memory translations */
 476void kvm_arch_flush_shadow_all(struct kvm *kvm);
 477/* flush memory translations pointing to 'slot' */
 478void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 479                                   struct kvm_memory_slot *slot);
 480
 481int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
 482                            int nr_pages);
 483
 484struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 485unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 486unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
 487void kvm_release_page_clean(struct page *page);
 488void kvm_release_page_dirty(struct page *page);
 489void kvm_set_page_dirty(struct page *page);
 490void kvm_set_page_accessed(struct page *page);
 491
 492pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
 493pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
 494                       bool write_fault, bool *writable);
 495pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 496pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
 497                      bool *writable);
 498pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
 499pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
 500
 501void kvm_release_pfn_dirty(pfn_t pfn);
 502void kvm_release_pfn_clean(pfn_t pfn);
 503void kvm_set_pfn_dirty(pfn_t pfn);
 504void kvm_set_pfn_accessed(pfn_t pfn);
 505void kvm_get_pfn(pfn_t pfn);
 506
 507int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 508                        int len);
 509int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 510                          unsigned long len);
 511int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 512int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 513                           void *data, unsigned long len);
 514int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 515                         int offset, int len);
 516int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 517                    unsigned long len);
 518int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 519                           void *data, unsigned long len);
 520int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 521                              gpa_t gpa, unsigned long len);
 522int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 523int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 524struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 525int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 526unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
 527void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 528void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
 529                             gfn_t gfn);
 530
 531void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 532void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 533bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
 534void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
 535void kvm_resched(struct kvm_vcpu *vcpu);
 536void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 537void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 538
 539void kvm_flush_remote_tlbs(struct kvm *kvm);
 540void kvm_reload_remote_mmus(struct kvm *kvm);
 541void kvm_make_mclock_inprogress_request(struct kvm *kvm);
 542void kvm_make_update_eoibitmap_request(struct kvm *kvm);
 543
 544long kvm_arch_dev_ioctl(struct file *filp,
 545                        unsigned int ioctl, unsigned long arg);
 546long kvm_arch_vcpu_ioctl(struct file *filp,
 547                         unsigned int ioctl, unsigned long arg);
 548int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
 549
 550int kvm_dev_ioctl_check_extension(long ext);
 551
 552int kvm_get_dirty_log(struct kvm *kvm,
 553                        struct kvm_dirty_log *log, int *is_dirty);
 554int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 555                                struct kvm_dirty_log *log);
 556
 557int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 558                                   struct
 559                                   kvm_userspace_memory_region *mem,
 560                                   bool user_alloc);
 561int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level);
 562long kvm_arch_vm_ioctl(struct file *filp,
 563                       unsigned int ioctl, unsigned long arg);
 564
 565int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 566int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 567
 568int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 569                                    struct kvm_translation *tr);
 570
 571int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 572int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 573int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 574                                  struct kvm_sregs *sregs);
 575int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 576                                  struct kvm_sregs *sregs);
 577int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 578                                    struct kvm_mp_state *mp_state);
 579int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 580                                    struct kvm_mp_state *mp_state);
 581int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 582                                        struct kvm_guest_debug *dbg);
 583int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 584
 585int kvm_arch_init(void *opaque);
 586void kvm_arch_exit(void);
 587
 588int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 589void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 590
 591void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 592void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 593void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 594struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 595int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 596int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
 597void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 598
 599int kvm_arch_hardware_enable(void *garbage);
 600void kvm_arch_hardware_disable(void *garbage);
 601int kvm_arch_hardware_setup(void);
 602void kvm_arch_hardware_unsetup(void);
 603void kvm_arch_check_processor_compat(void *rtn);
 604int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 605int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
 606
 607void kvm_free_physmem(struct kvm *kvm);
 608
 609void *kvm_kvzalloc(unsigned long size);
 610void kvm_kvfree(const void *addr);
 611
 612#ifndef __KVM_HAVE_ARCH_VM_ALLOC
 613static inline struct kvm *kvm_arch_alloc_vm(void)
 614{
 615        return kzalloc(sizeof(struct kvm), GFP_KERNEL);
 616}
 617
 618static inline void kvm_arch_free_vm(struct kvm *kvm)
 619{
 620        kfree(kvm);
 621}
 622#endif
 623
 624static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
 625{
 626#ifdef __KVM_HAVE_ARCH_WQP
 627        return vcpu->arch.wqp;
 628#else
 629        return &vcpu->wq;
 630#endif
 631}
 632
 633int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
 634void kvm_arch_destroy_vm(struct kvm *kvm);
 635void kvm_free_all_assigned_devices(struct kvm *kvm);
 636void kvm_arch_sync_events(struct kvm *kvm);
 637
 638int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 639void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 640
 641bool kvm_is_mmio_pfn(pfn_t pfn);
 642
 643struct kvm_irq_ack_notifier {
 644        struct hlist_node link;
 645        unsigned gsi;
 646        void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 647};
 648
 649struct kvm_assigned_dev_kernel {
 650        struct kvm_irq_ack_notifier ack_notifier;
 651        struct list_head list;
 652        int assigned_dev_id;
 653        int host_segnr;
 654        int host_busnr;
 655        int host_devfn;
 656        unsigned int entries_nr;
 657        int host_irq;
 658        bool host_irq_disabled;
 659        bool pci_2_3;
 660        struct msix_entry *host_msix_entries;
 661        int guest_irq;
 662        struct msix_entry *guest_msix_entries;
 663        unsigned long irq_requested_type;
 664        int irq_source_id;
 665        int flags;
 666        struct pci_dev *dev;
 667        struct kvm *kvm;
 668        spinlock_t intx_lock;
 669        spinlock_t intx_mask_lock;
 670        char irq_name[32];
 671        struct pci_saved_state *pci_saved_state;
 672};
 673
 674struct kvm_irq_mask_notifier {
 675        void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 676        int irq;
 677        struct hlist_node link;
 678};
 679
 680void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 681                                    struct kvm_irq_mask_notifier *kimn);
 682void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 683                                      struct kvm_irq_mask_notifier *kimn);
 684void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
 685                             bool mask);
 686
 687#ifdef __KVM_HAVE_IOAPIC
 688void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
 689                                   union kvm_ioapic_redirect_entry *entry,
 690                                   unsigned long *deliver_bitmask);
 691#endif
 692int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 693int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level);
 694int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
 695                int irq_source_id, int level);
 696bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
 697void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 698void kvm_register_irq_ack_notifier(struct kvm *kvm,
 699                                   struct kvm_irq_ack_notifier *kian);
 700void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 701                                   struct kvm_irq_ack_notifier *kian);
 702int kvm_request_irq_source_id(struct kvm *kvm);
 703void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 704
 705/* For vcpu->arch.iommu_flags */
 706#define KVM_IOMMU_CACHE_COHERENCY       0x1
 707
 708#ifdef CONFIG_IOMMU_API
 709int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 710void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
 711int kvm_iommu_map_guest(struct kvm *kvm);
 712int kvm_iommu_unmap_guest(struct kvm *kvm);
 713int kvm_assign_device(struct kvm *kvm,
 714                      struct kvm_assigned_dev_kernel *assigned_dev);
 715int kvm_deassign_device(struct kvm *kvm,
 716                        struct kvm_assigned_dev_kernel *assigned_dev);
 717#else /* CONFIG_IOMMU_API */
 718static inline int kvm_iommu_map_pages(struct kvm *kvm,
 719                                      struct kvm_memory_slot *slot)
 720{
 721        return 0;
 722}
 723
 724static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
 725                                         struct kvm_memory_slot *slot)
 726{
 727}
 728
 729static inline int kvm_iommu_map_guest(struct kvm *kvm)
 730{
 731        return -ENODEV;
 732}
 733
 734static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 735{
 736        return 0;
 737}
 738
 739static inline int kvm_assign_device(struct kvm *kvm,
 740                struct kvm_assigned_dev_kernel *assigned_dev)
 741{
 742        return 0;
 743}
 744
 745static inline int kvm_deassign_device(struct kvm *kvm,
 746                struct kvm_assigned_dev_kernel *assigned_dev)
 747{
 748        return 0;
 749}
 750#endif /* CONFIG_IOMMU_API */
 751
 752static inline void __guest_enter(void)
 753{
 754        /*
 755         * This is running in ioctl context so we can avoid
 756         * the call to vtime_account() with its unnecessary idle check.
 757         */
 758        vtime_account_system(current);
 759        current->flags |= PF_VCPU;
 760}
 761
 762static inline void __guest_exit(void)
 763{
 764        /*
 765         * This is running in ioctl context so we can avoid
 766         * the call to vtime_account() with its unnecessary idle check.
 767         */
 768        vtime_account_system(current);
 769        current->flags &= ~PF_VCPU;
 770}
 771
 772#ifdef CONFIG_CONTEXT_TRACKING
 773extern void guest_enter(void);
 774extern void guest_exit(void);
 775
 776#else /* !CONFIG_CONTEXT_TRACKING */
 777static inline void guest_enter(void)
 778{
 779        __guest_enter();
 780}
 781
 782static inline void guest_exit(void)
 783{
 784        __guest_exit();
 785}
 786#endif /* !CONFIG_CONTEXT_TRACKING */
 787
 788static inline void kvm_guest_enter(void)
 789{
 790        unsigned long flags;
 791
 792        BUG_ON(preemptible());
 793
 794        local_irq_save(flags);
 795        guest_enter();
 796        local_irq_restore(flags);
 797
 798        /* KVM does not hold any references to rcu protected data when it
 799         * switches CPU into a guest mode. In fact switching to a guest mode
 800         * is very similar to exiting to userspase from rcu point of view. In
 801         * addition CPU may stay in a guest mode for quite a long time (up to
 802         * one time slice). Lets treat guest mode as quiescent state, just like
 803         * we do with user-mode execution.
 804         */
 805        rcu_virt_note_context_switch(smp_processor_id());
 806}
 807
 808static inline void kvm_guest_exit(void)
 809{
 810        unsigned long flags;
 811
 812        local_irq_save(flags);
 813        guest_exit();
 814        local_irq_restore(flags);
 815}
 816
 817/*
 818 * search_memslots() and __gfn_to_memslot() are here because they are
 819 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
 820 * gfn_to_memslot() itself isn't here as an inline because that would
 821 * bloat other code too much.
 822 */
 823static inline struct kvm_memory_slot *
 824search_memslots(struct kvm_memslots *slots, gfn_t gfn)
 825{
 826        struct kvm_memory_slot *memslot;
 827
 828        kvm_for_each_memslot(memslot, slots)
 829                if (gfn >= memslot->base_gfn &&
 830                      gfn < memslot->base_gfn + memslot->npages)
 831                        return memslot;
 832
 833        return NULL;
 834}
 835
 836static inline struct kvm_memory_slot *
 837__gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
 838{
 839        return search_memslots(slots, gfn);
 840}
 841
 842static inline unsigned long
 843__gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
 844{
 845        return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
 846}
 847
 848static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
 849{
 850        return gfn_to_memslot(kvm, gfn)->id;
 851}
 852
 853static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
 854{
 855        /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
 856        return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
 857                (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
 858}
 859
 860static inline gfn_t
 861hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
 862{
 863        gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
 864
 865        return slot->base_gfn + gfn_offset;
 866}
 867
 868static inline gpa_t gfn_to_gpa(gfn_t gfn)
 869{
 870        return (gpa_t)gfn << PAGE_SHIFT;
 871}
 872
 873static inline gfn_t gpa_to_gfn(gpa_t gpa)
 874{
 875        return (gfn_t)(gpa >> PAGE_SHIFT);
 876}
 877
 878static inline hpa_t pfn_to_hpa(pfn_t pfn)
 879{
 880        return (hpa_t)pfn << PAGE_SHIFT;
 881}
 882
 883static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 884{
 885        set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 886}
 887
 888enum kvm_stat_kind {
 889        KVM_STAT_VM,
 890        KVM_STAT_VCPU,
 891};
 892
 893struct kvm_stats_debugfs_item {
 894        const char *name;
 895        int offset;
 896        enum kvm_stat_kind kind;
 897        struct dentry *dentry;
 898};
 899extern struct kvm_stats_debugfs_item debugfs_entries[];
 900extern struct dentry *kvm_debugfs_dir;
 901
 902#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
 903static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
 904{
 905        if (unlikely(kvm->mmu_notifier_count))
 906                return 1;
 907        /*
 908         * Ensure the read of mmu_notifier_count happens before the read
 909         * of mmu_notifier_seq.  This interacts with the smp_wmb() in
 910         * mmu_notifier_invalidate_range_end to make sure that the caller
 911         * either sees the old (non-zero) value of mmu_notifier_count or
 912         * the new (incremented) value of mmu_notifier_seq.
 913         * PowerPC Book3s HV KVM calls this under a per-page lock
 914         * rather than under kvm->mmu_lock, for scalability, so
 915         * can't rely on kvm->mmu_lock to keep things ordered.
 916         */
 917        smp_rmb();
 918        if (kvm->mmu_notifier_seq != mmu_seq)
 919                return 1;
 920        return 0;
 921}
 922#endif
 923
 924#ifdef KVM_CAP_IRQ_ROUTING
 925
 926#define KVM_MAX_IRQ_ROUTES 1024
 927
 928int kvm_setup_default_irq_routing(struct kvm *kvm);
 929int kvm_set_irq_routing(struct kvm *kvm,
 930                        const struct kvm_irq_routing_entry *entries,
 931                        unsigned nr,
 932                        unsigned flags);
 933void kvm_free_irq_routing(struct kvm *kvm);
 934
 935int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
 936
 937#else
 938
 939static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 940
 941#endif
 942
 943#ifdef CONFIG_HAVE_KVM_EVENTFD
 944
 945void kvm_eventfd_init(struct kvm *kvm);
 946int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 947
 948#ifdef CONFIG_HAVE_KVM_IRQCHIP
 949int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
 950void kvm_irqfd_release(struct kvm *kvm);
 951void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
 952#else
 953static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
 954{
 955        return -EINVAL;
 956}
 957
 958static inline void kvm_irqfd_release(struct kvm *kvm) {}
 959#endif
 960
 961#else
 962
 963static inline void kvm_eventfd_init(struct kvm *kvm) {}
 964
 965static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
 966{
 967        return -EINVAL;
 968}
 969
 970static inline void kvm_irqfd_release(struct kvm *kvm) {}
 971
 972#ifdef CONFIG_HAVE_KVM_IRQCHIP
 973static inline void kvm_irq_routing_update(struct kvm *kvm,
 974                                          struct kvm_irq_routing_table *irq_rt)
 975{
 976        rcu_assign_pointer(kvm->irq_routing, irq_rt);
 977}
 978#endif
 979
 980static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
 981{
 982        return -ENOSYS;
 983}
 984
 985#endif /* CONFIG_HAVE_KVM_EVENTFD */
 986
 987#ifdef CONFIG_KVM_APIC_ARCHITECTURE
 988static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
 989{
 990        return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
 991}
 992
 993bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
 994
 995#else
 996
 997static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
 998
 999#endif
1000
1001#ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
1002
1003long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
1004                                  unsigned long arg);
1005
1006#else
1007
1008static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
1009                                                unsigned long arg)
1010{
1011        return -ENOTTY;
1012}
1013
1014#endif
1015
1016static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
1017{
1018        set_bit(req, &vcpu->requests);
1019}
1020
1021static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
1022{
1023        if (test_bit(req, &vcpu->requests)) {
1024                clear_bit(req, &vcpu->requests);
1025                return true;
1026        } else {
1027                return false;
1028        }
1029}
1030
1031#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
1032
1033static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1034{
1035        vcpu->spin_loop.in_spin_loop = val;
1036}
1037static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1038{
1039        vcpu->spin_loop.dy_eligible = val;
1040}
1041
1042#else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1043
1044static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
1045{
1046}
1047
1048static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
1049{
1050}
1051
1052static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
1053{
1054        return true;
1055}
1056
1057#endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
1058#endif
1059
1060
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