include/linux/kvm_host.h

   1 #ifndef __KVM_HOST_H
   2 #define __KVM_HOST_H
   3
   4 /*
   5  * This work is licensed under the terms of the GNU GPL, version 2.  See
   6  * the COPYING file in the top-level directory.
   7  */
   8
   9 #include <linux/types.h>
  10 #include <linux/hardirq.h>
  11 #include <linux/list.h>
  12 #include <linux/mutex.h>
  13 #include <linux/spinlock.h>
  14 #include <linux/signal.h>
  15 #include <linux/sched.h>
  16 #include <linux/mm.h>
  17 #include <linux/preempt.h>
  18 #include <linux/marker.h>
  19 #include <asm/signal.h>
  20
  21 #include <linux/kvm.h>
  22 #include <linux/kvm_para.h>
  23
  24 #include <linux/kvm_types.h>
  25
  26 #include <asm/kvm_host.h>
  27
  28 /*
  29  * vcpu->requests bit members
  30  */
  31 #define KVM_REQ_TLB_FLUSH          0
  32 #define KVM_REQ_MIGRATE_TIMER      1
  33 #define KVM_REQ_REPORT_TPR_ACCESS  2
  34 #define KVM_REQ_MMU_RELOAD         3
  35 #define KVM_REQ_TRIPLE_FAULT       4
  36 #define KVM_REQ_PENDING_TIMER      5
  37
  38 struct kvm_vcpu;
  39 extern struct kmem_cache *kvm_vcpu_cache;
  40
  41 /*
  42  * It would be nice to use something smarter than a linear search, TBD...
  43  * Thankfully we dont expect many devices to register (famous last words :),
  44  * so until then it will suffice.  At least its abstracted so we can change
  45  * in one place.
  46  */
  47 struct kvm_io_bus {
  48         int                   dev_count;
  49 #define NR_IOBUS_DEVS 6
  50         struct kvm_io_device *devs[NR_IOBUS_DEVS];
  51 };
  52
  53 void kvm_io_bus_init(struct kvm_io_bus *bus);
  54 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
  55 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
  56 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
  57                              struct kvm_io_device *dev);
  58
  59 struct kvm_vcpu {
  60         struct kvm *kvm;
  61 #ifdef CONFIG_PREEMPT_NOTIFIERS
  62         struct preempt_notifier preempt_notifier;
  63 #endif
  64         int vcpu_id;
  65         struct mutex mutex;
  66         int   cpu;
  67         struct kvm_run *run;
  68         int guest_mode;
  69         unsigned long requests;
  70         struct kvm_guest_debug guest_debug;
  71         int fpu_active;
  72         int guest_fpu_loaded;
  73         wait_queue_head_t wq;
  74         int sigset_active;
  75         sigset_t sigset;
  76         struct kvm_vcpu_stat stat;
  77
  78 #ifdef CONFIG_HAS_IOMEM
  79         int mmio_needed;
  80         int mmio_read_completed;
  81         int mmio_is_write;
  82         int mmio_size;
  83         unsigned char mmio_data[8];
  84         gpa_t mmio_phys_addr;
  85 #endif
  86
  87         struct kvm_vcpu_arch arch;
  88 };
  89
  90 struct kvm_memory_slot {
  91         gfn_t base_gfn;
  92         unsigned long npages;
  93         unsigned long flags;
  94         unsigned long *rmap;
  95         unsigned long *dirty_bitmap;
  96         struct {
  97                 unsigned long rmap_pde;
  98                 int write_count;
  99         } *lpage_info;
 100         unsigned long userspace_addr;
 101         int user_alloc;
 102 };
 103
 104 struct kvm {
 105         struct mutex lock; /* protects the vcpus array and APIC accesses */
 106         spinlock_t mmu_lock;
 107         struct rw_semaphore slots_lock;
 108         struct mm_struct *mm; /* userspace tied to this vm */
 109         int nmemslots;
 110         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 111                                         KVM_PRIVATE_MEM_SLOTS];
 112         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 113         struct list_head vm_list;
 114         struct kvm_io_bus mmio_bus;
 115         struct kvm_io_bus pio_bus;
 116         struct kvm_vm_stat stat;
 117         struct kvm_arch arch;
 118         atomic_t users_count;
 119 };
 120
 121 /* The guest did something we don't support. */
 122 #define pr_unimpl(vcpu, fmt, ...)                                       \
 123  do {                                                                   \
 124         if (printk_ratelimit())                                         \
 125                 printk(KERN_ERR "kvm: %i: cpu%i " fmt,                  \
 126                        current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 127  } while (0)
 128
 129 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 130 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 131
 132 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 133 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 134
 135 void vcpu_load(struct kvm_vcpu *vcpu);
 136 void vcpu_put(struct kvm_vcpu *vcpu);
 137
 138 void decache_vcpus_on_cpu(int cpu);
 139
 140
 141 int kvm_init(void *opaque, unsigned int vcpu_size,
 142                   struct module *module);
 143 void kvm_exit(void);
 144
 145 void kvm_get_kvm(struct kvm *kvm);
 146 void kvm_put_kvm(struct kvm *kvm);
 147
 148 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 149 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 150 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 151 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
 152
 153 extern struct page *bad_page;
 154 extern pfn_t bad_pfn;
 155
 156 int is_error_page(struct page *page);
 157 int is_error_pfn(pfn_t pfn);
 158 int kvm_is_error_hva(unsigned long addr);
 159 int kvm_set_memory_region(struct kvm *kvm,
 160                           struct kvm_userspace_memory_region *mem,
 161                           int user_alloc);
 162 int __kvm_set_memory_region(struct kvm *kvm,
 163                             struct kvm_userspace_memory_region *mem,
 164                             int user_alloc);
 165 int kvm_arch_set_memory_region(struct kvm *kvm,
 166                                 struct kvm_userspace_memory_region *mem,
 167                                 struct kvm_memory_slot old,
 168                                 int user_alloc);
 169 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
 170 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 171 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
 172 void kvm_release_page_clean(struct page *page);
 173 void kvm_release_page_dirty(struct page *page);
 174 void kvm_set_page_dirty(struct page *page);
 175 void kvm_set_page_accessed(struct page *page);
 176
 177 pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
 178 void kvm_release_pfn_dirty(pfn_t);
 179 void kvm_release_pfn_clean(pfn_t pfn);
 180 void kvm_set_pfn_dirty(pfn_t pfn);
 181 void kvm_set_pfn_accessed(pfn_t pfn);
 182 void kvm_get_pfn(pfn_t pfn);
 183
 184 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 185                         int len);
 186 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 187                           unsigned long len);
 188 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 189 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 190                          int offset, int len);
 191 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 192                     unsigned long len);
 193 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 194 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 195 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 196 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 197 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 198
 199 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 200 void kvm_resched(struct kvm_vcpu *vcpu);
 201 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 202 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 203 void kvm_flush_remote_tlbs(struct kvm *kvm);
 204 void kvm_reload_remote_mmus(struct kvm *kvm);
 205
 206 long kvm_arch_dev_ioctl(struct file *filp,
 207                         unsigned int ioctl, unsigned long arg);
 208 long kvm_arch_vcpu_ioctl(struct file *filp,
 209                          unsigned int ioctl, unsigned long arg);
 210 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 211 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 212
 213 int kvm_dev_ioctl_check_extension(long ext);
 214
 215 int kvm_get_dirty_log(struct kvm *kvm,
 216                         struct kvm_dirty_log *log, int *is_dirty);
 217 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 218                                 struct kvm_dirty_log *log);
 219
 220 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 221                                    struct
 222                                    kvm_userspace_memory_region *mem,
 223                                    int user_alloc);
 224 long kvm_arch_vm_ioctl(struct file *filp,
 225                        unsigned int ioctl, unsigned long arg);
 226 void kvm_arch_destroy_vm(struct kvm *kvm);
 227
 228 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 229 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 230
 231 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 232                                     struct kvm_translation *tr);
 233
 234 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 235 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 236 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 237                                   struct kvm_sregs *sregs);
 238 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 239                                   struct kvm_sregs *sregs);
 240 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 241                                     struct kvm_mp_state *mp_state);
 242 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 243                                     struct kvm_mp_state *mp_state);
 244 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
 245                                     struct kvm_debug_guest *dbg);
 246 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 247
 248 int kvm_arch_init(void *opaque);
 249 void kvm_arch_exit(void);
 250
 251 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 252 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 253
 254 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 255 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 256 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 257 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 258 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 259 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 260
 261 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 262 void kvm_arch_hardware_enable(void *garbage);
 263 void kvm_arch_hardware_disable(void *garbage);
 264 int kvm_arch_hardware_setup(void);
 265 void kvm_arch_hardware_unsetup(void);
 266 void kvm_arch_check_processor_compat(void *rtn);
 267 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 268
 269 void kvm_free_physmem(struct kvm *kvm);
 270
 271 struct  kvm *kvm_arch_create_vm(void);
 272 void kvm_arch_destroy_vm(struct kvm *kvm);
 273
 274 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
 275 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
 276 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 277 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 278
 279 static inline void kvm_guest_enter(void)
 280 {
 281         account_system_vtime(current);
 282         current->flags |= PF_VCPU;
 283 }
 284
 285 static inline void kvm_guest_exit(void)
 286 {
 287         account_system_vtime(current);
 288         current->flags &= ~PF_VCPU;
 289 }
 290
 291 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
 292 {
 293         return slot - kvm->memslots;
 294 }
 295
 296 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 297 {
 298         return (gpa_t)gfn << PAGE_SHIFT;
 299 }
 300
 301 static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
 302 {
 303         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 304 }
 305
 306 enum kvm_stat_kind {
 307         KVM_STAT_VM,
 308         KVM_STAT_VCPU,
 309 };
 310
 311 struct kvm_stats_debugfs_item {
 312         const char *name;
 313         int offset;
 314         enum kvm_stat_kind kind;
 315         struct dentry *dentry;
 316 };
 317 extern struct kvm_stats_debugfs_item debugfs_entries[];
 318 extern struct dentry *kvm_debugfs_dir;
 319
 320 #ifdef CONFIG_KVM_TRACE
 321 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg);
 322 void kvm_trace_cleanup(void);
 323 #else
 324 static inline
 325 int kvm_trace_ioctl(unsigned int ioctl, unsigned long arg)
 326 {
 327         return -EINVAL;
 328 }
 329 #define kvm_trace_cleanup() ((void)0)
 330 #endif
 331
 332 #endif