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/mm.h>
  17#include <linux/preempt.h>
  18#include <linux/marker.h>
  19#include <linux/msi.h>
  20#include <asm/signal.h>
  21
  22#include <linux/kvm.h>
  23#include <linux/kvm_para.h>
  24
  25#include <linux/kvm_types.h>
  26
  27#include <asm/kvm_host.h>
  28
  29/*
  30 * vcpu->requests bit members
  31 */
  32#define KVM_REQ_TLB_FLUSH          0
  33#define KVM_REQ_MIGRATE_TIMER      1
  34#define KVM_REQ_REPORT_TPR_ACCESS  2
  35#define KVM_REQ_MMU_RELOAD         3
  36#define KVM_REQ_TRIPLE_FAULT       4
  37#define KVM_REQ_PENDING_TIMER      5
  38#define KVM_REQ_UNHALT             6
  39#define KVM_REQ_MMU_SYNC           7
  40#define KVM_REQ_KVMCLOCK_UPDATE    8
  41
  42#define KVM_USERSPACE_IRQ_SOURCE_ID     0
  43
  44struct kvm_vcpu;
  45extern struct kmem_cache *kvm_vcpu_cache;
  46
  47/*
  48 * It would be nice to use something smarter than a linear search, TBD...
  49 * Thankfully we dont expect many devices to register (famous last words :),
  50 * so until then it will suffice.  At least its abstracted so we can change
  51 * in one place.
  52 */
  53struct kvm_io_bus {
  54        int                   dev_count;
  55#define NR_IOBUS_DEVS 6
  56        struct kvm_io_device *devs[NR_IOBUS_DEVS];
  57};
  58
  59void kvm_io_bus_init(struct kvm_io_bus *bus);
  60void kvm_io_bus_destroy(struct kvm_io_bus *bus);
  61struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus,
  62                                          gpa_t addr, int len, int is_write);
  63void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
  64                             struct kvm_io_device *dev);
  65
  66struct kvm_vcpu {
  67        struct kvm *kvm;
  68#ifdef CONFIG_PREEMPT_NOTIFIERS
  69        struct preempt_notifier preempt_notifier;
  70#endif
  71        int vcpu_id;
  72        struct mutex mutex;
  73        int   cpu;
  74        struct kvm_run *run;
  75        int guest_mode;
  76        unsigned long requests;
  77        unsigned long guest_debug;
  78        int fpu_active;
  79        int guest_fpu_loaded;
  80        wait_queue_head_t wq;
  81        int sigset_active;
  82        sigset_t sigset;
  83        struct kvm_vcpu_stat stat;
  84
  85#ifdef CONFIG_HAS_IOMEM
  86        int mmio_needed;
  87        int mmio_read_completed;
  88        int mmio_is_write;
  89        int mmio_size;
  90        unsigned char mmio_data[8];
  91        gpa_t mmio_phys_addr;
  92#endif
  93
  94        struct kvm_vcpu_arch arch;
  95};
  96
  97struct kvm_memory_slot {
  98        gfn_t base_gfn;
  99        unsigned long npages;
 100        unsigned long flags;
 101        unsigned long *rmap;
 102        unsigned long *dirty_bitmap;
 103        struct {
 104                unsigned long rmap_pde;
 105                int write_count;
 106        } *lpage_info;
 107        unsigned long userspace_addr;
 108        int user_alloc;
 109};
 110
 111struct kvm_kernel_irq_routing_entry {
 112        u32 gsi;
 113        u32 type;
 114        int (*set)(struct kvm_kernel_irq_routing_entry *e,
 115                    struct kvm *kvm, int level);
 116        union {
 117                struct {
 118                        unsigned irqchip;
 119                        unsigned pin;
 120                } irqchip;
 121                struct msi_msg msi;
 122        };
 123        struct list_head link;
 124};
 125
 126struct kvm {
 127        struct mutex lock; /* protects the vcpus array and APIC accesses */
 128        spinlock_t mmu_lock;
 129        spinlock_t requests_lock;
 130        struct rw_semaphore slots_lock;
 131        struct mm_struct *mm; /* userspace tied to this vm */
 132        int nmemslots;
 133        struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 134                                        KVM_PRIVATE_MEM_SLOTS];
 135        struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 136        struct list_head vm_list;
 137        struct kvm_io_bus mmio_bus;
 138        struct kvm_io_bus pio_bus;
 139        struct kvm_vm_stat stat;
 140        struct kvm_arch arch;
 141        atomic_t users_count;
 142#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
 143        struct kvm_coalesced_mmio_dev *coalesced_mmio_dev;
 144        struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
 145#endif
 146
 147#ifdef CONFIG_HAVE_KVM_IRQCHIP
 148        struct list_head irq_routing; /* of kvm_kernel_irq_routing_entry */
 149        struct hlist_head mask_notifier_list;
 150#endif
 151
 152#ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 153        struct mmu_notifier mmu_notifier;
 154        unsigned long mmu_notifier_seq;
 155        long mmu_notifier_count;
 156#endif
 157};
 158
 159/* The guest did something we don't support. */
 160#define pr_unimpl(vcpu, fmt, ...)                                       \
 161 do {                                                                   \
 162        if (printk_ratelimit())                                         \
 163                printk(KERN_ERR "kvm: %i: cpu%i " fmt,                  \
 164                       current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 165 } while (0)
 166
 167#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 168#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 169
 170int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 171void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 172
 173void vcpu_load(struct kvm_vcpu *vcpu);
 174void vcpu_put(struct kvm_vcpu *vcpu);
 175
 176int kvm_init(void *opaque, unsigned int vcpu_size,
 177                  struct module *module);
 178void kvm_exit(void);
 179
 180void kvm_get_kvm(struct kvm *kvm);
 181void kvm_put_kvm(struct kvm *kvm);
 182
 183#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 184#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 185static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 186struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
 187
 188extern struct page *bad_page;
 189extern pfn_t bad_pfn;
 190
 191int is_error_page(struct page *page);
 192int is_error_pfn(pfn_t pfn);
 193int kvm_is_error_hva(unsigned long addr);
 194int kvm_set_memory_region(struct kvm *kvm,
 195                          struct kvm_userspace_memory_region *mem,
 196                          int user_alloc);
 197int __kvm_set_memory_region(struct kvm *kvm,
 198                            struct kvm_userspace_memory_region *mem,
 199                            int user_alloc);
 200int kvm_arch_set_memory_region(struct kvm *kvm,
 201                                struct kvm_userspace_memory_region *mem,
 202                                struct kvm_memory_slot old,
 203                                int user_alloc);
 204void kvm_arch_flush_shadow(struct kvm *kvm);
 205gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
 206struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 207unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 208void kvm_release_page_clean(struct page *page);
 209void kvm_release_page_dirty(struct page *page);
 210void kvm_set_page_dirty(struct page *page);
 211void kvm_set_page_accessed(struct page *page);
 212
 213pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 214void kvm_release_pfn_dirty(pfn_t);
 215void kvm_release_pfn_clean(pfn_t pfn);
 216void kvm_set_pfn_dirty(pfn_t pfn);
 217void kvm_set_pfn_accessed(pfn_t pfn);
 218void kvm_get_pfn(pfn_t pfn);
 219
 220int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 221                        int len);
 222int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 223                          unsigned long len);
 224int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 225int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 226                         int offset, int len);
 227int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 228                    unsigned long len);
 229int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 230int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 231struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 232int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 233void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 234
 235void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 236void kvm_resched(struct kvm_vcpu *vcpu);
 237void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 238void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 239void kvm_flush_remote_tlbs(struct kvm *kvm);
 240void kvm_reload_remote_mmus(struct kvm *kvm);
 241
 242long kvm_arch_dev_ioctl(struct file *filp,
 243                        unsigned int ioctl, unsigned long arg);
 244long kvm_arch_vcpu_ioctl(struct file *filp,
 245                         unsigned int ioctl, unsigned long arg);
 246void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 247void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 248
 249int kvm_dev_ioctl_check_extension(long ext);
 250
 251int kvm_get_dirty_log(struct kvm *kvm,
 252                        struct kvm_dirty_log *log, int *is_dirty);
 253int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 254                                struct kvm_dirty_log *log);
 255
 256int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 257                                   struct
 258                                   kvm_userspace_memory_region *mem,
 259                                   int user_alloc);
 260long kvm_arch_vm_ioctl(struct file *filp,
 261                       unsigned int ioctl, unsigned long arg);
 262
 263int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 264int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 265
 266int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 267                                    struct kvm_translation *tr);
 268
 269int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 270int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 271int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 272                                  struct kvm_sregs *sregs);
 273int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 274                                  struct kvm_sregs *sregs);
 275int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 276                                    struct kvm_mp_state *mp_state);
 277int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 278                                    struct kvm_mp_state *mp_state);
 279int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 280                                        struct kvm_guest_debug *dbg);
 281int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 282
 283int kvm_arch_init(void *opaque);
 284void kvm_arch_exit(void);
 285
 286int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 287void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 288
 289void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 290void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 291void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 292struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 293int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 294void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 295
 296int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 297void kvm_arch_hardware_enable(void *garbage);
 298void kvm_arch_hardware_disable(void *garbage);
 299int kvm_arch_hardware_setup(void);
 300void kvm_arch_hardware_unsetup(void);
 301void kvm_arch_check_processor_compat(void *rtn);
 302int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 303
 304void kvm_free_physmem(struct kvm *kvm);
 305
 306struct  kvm *kvm_arch_create_vm(void);
 307void kvm_arch_destroy_vm(struct kvm *kvm);
 308void kvm_free_all_assigned_devices(struct kvm *kvm);
 309void kvm_arch_sync_events(struct kvm *kvm);
 310
 311int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
 312int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
 313int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 314void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 315
 316int kvm_is_mmio_pfn(pfn_t pfn);
 317
 318struct kvm_irq_ack_notifier {
 319        struct hlist_node link;
 320        unsigned gsi;
 321        void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
 322};
 323
 324struct kvm_assigned_dev_kernel {
 325        struct kvm_irq_ack_notifier ack_notifier;
 326        struct work_struct interrupt_work;
 327        struct list_head list;
 328        int assigned_dev_id;
 329        int host_busnr;
 330        int host_devfn;
 331        int host_irq;
 332        bool host_irq_disabled;
 333        int guest_irq;
 334#define KVM_ASSIGNED_DEV_GUEST_INTX     (1 << 0)
 335#define KVM_ASSIGNED_DEV_GUEST_MSI      (1 << 1)
 336#define KVM_ASSIGNED_DEV_HOST_INTX      (1 << 8)
 337#define KVM_ASSIGNED_DEV_HOST_MSI       (1 << 9)
 338        unsigned long irq_requested_type;
 339        int irq_source_id;
 340        int flags;
 341        struct pci_dev *dev;
 342        struct kvm *kvm;
 343};
 344
 345struct kvm_irq_mask_notifier {
 346        void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
 347        int irq;
 348        struct hlist_node link;
 349};
 350
 351void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 352                                    struct kvm_irq_mask_notifier *kimn);
 353void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
 354                                      struct kvm_irq_mask_notifier *kimn);
 355void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
 356
 357int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level);
 358void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 359void kvm_register_irq_ack_notifier(struct kvm *kvm,
 360                                   struct kvm_irq_ack_notifier *kian);
 361void kvm_unregister_irq_ack_notifier(struct kvm_irq_ack_notifier *kian);
 362int kvm_request_irq_source_id(struct kvm *kvm);
 363void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
 364
 365#ifdef CONFIG_IOMMU_API
 366int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn,
 367                        unsigned long npages);
 368int kvm_iommu_map_guest(struct kvm *kvm);
 369int kvm_iommu_unmap_guest(struct kvm *kvm);
 370int kvm_assign_device(struct kvm *kvm,
 371                      struct kvm_assigned_dev_kernel *assigned_dev);
 372int kvm_deassign_device(struct kvm *kvm,
 373                        struct kvm_assigned_dev_kernel *assigned_dev);
 374#else /* CONFIG_IOMMU_API */
 375static inline int kvm_iommu_map_pages(struct kvm *kvm,
 376                                      gfn_t base_gfn,
 377                                      unsigned long npages)
 378{
 379        return 0;
 380}
 381
 382static inline int kvm_iommu_map_guest(struct kvm *kvm)
 383{
 384        return -ENODEV;
 385}
 386
 387static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
 388{
 389        return 0;
 390}
 391
 392static inline int kvm_assign_device(struct kvm *kvm,
 393                struct kvm_assigned_dev_kernel *assigned_dev)
 394{
 395        return 0;
 396}
 397
 398static inline int kvm_deassign_device(struct kvm *kvm,
 399                struct kvm_assigned_dev_kernel *assigned_dev)
 400{
 401        return 0;
 402}
 403#endif /* CONFIG_IOMMU_API */
 404
 405static inline void kvm_guest_enter(void)
 406{
 407        account_system_vtime(current);
 408        current->flags |= PF_VCPU;
 409}
 410
 411static inline void kvm_guest_exit(void)
 412{
 413        account_system_vtime(current);
 414        current->flags &= ~PF_VCPU;
 415}
 416
 417static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
 418{
 419        return slot - kvm->memslots;
 420}
 421
 422static inline gpa_t gfn_to_gpa(gfn_t gfn)
 423{
 424        return (gpa_t)gfn << PAGE_SHIFT;
 425}
 426
 427static inline hpa_t pfn_to_hpa(pfn_t pfn)
 428{
 429        return (hpa_t)pfn << PAGE_SHIFT;
 430}
 431
 432static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 433{
 434        set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 435}
 436
 437enum kvm_stat_kind {
 438        KVM_STAT_VM,
 439        KVM_STAT_VCPU,
 440};
 441
 442struct kvm_stats_debugfs_item {
 443        const char *name;
 444        int offset;
 445        enum kvm_stat_kind kind;
 446        struct dentry *dentry;
 447};
 448extern struct kvm_stats_debugfs_item debugfs_entries[];
 449extern struct dentry *kvm_debugfs_dir;
 450
 451#define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \
 452        trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 453                                                vcpu, 5, d1, d2, d3, d4, d5)
 454#define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \
 455        trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 456                                                vcpu, 4, d1, d2, d3, d4, 0)
 457#define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \
 458        trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 459                                                vcpu, 3, d1, d2, d3, 0, 0)
 460#define KVMTRACE_2D(evt, vcpu, d1, d2, name) \
 461        trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 462                                                vcpu, 2, d1, d2, 0, 0, 0)
 463#define KVMTRACE_1D(evt, vcpu, d1, name) \
 464        trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 465                                                vcpu, 1, d1, 0, 0, 0, 0)
 466#define KVMTRACE_0D(evt, vcpu, name) \
 467        trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
 468                                                vcpu, 0, 0, 0, 0, 0, 0)
 469
 470#ifdef CONFIG_KVM_TRACE
 471int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg);
 472void kvm_trace_cleanup(void);
 473#else
 474static inline
 475int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg)
 476{
 477        return -EINVAL;
 478}
 479#define kvm_trace_cleanup() ((void)0)
 480#endif
 481
 482#ifdef KVM_ARCH_WANT_MMU_NOTIFIER
 483static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
 484{
 485        if (unlikely(vcpu->kvm->mmu_notifier_count))
 486                return 1;
 487        /*
 488         * Both reads happen under the mmu_lock and both values are
 489         * modified under mmu_lock, so there's no need of smb_rmb()
 490         * here in between, otherwise mmu_notifier_count should be
 491         * read before mmu_notifier_seq, see
 492         * mmu_notifier_invalidate_range_end write side.
 493         */
 494        if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
 495                return 1;
 496        return 0;
 497}
 498#endif
 499
 500#ifdef CONFIG_HAVE_KVM_IRQCHIP
 501
 502#define KVM_MAX_IRQ_ROUTES 1024
 503
 504int kvm_setup_default_irq_routing(struct kvm *kvm);
 505int kvm_set_irq_routing(struct kvm *kvm,
 506                        const struct kvm_irq_routing_entry *entries,
 507                        unsigned nr,
 508                        unsigned flags);
 509void kvm_free_irq_routing(struct kvm *kvm);
 510
 511#else
 512
 513static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 514
 515#endif
 516
 517#endif
 518