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