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 4
  28 #define KVM_MEMORY_SLOTS 8
  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
  41 struct kvm_vcpu;
  42 extern struct kmem_cache *kvm_vcpu_cache;
  43
  44 struct kvm_guest_debug {
  45         int enabled;
  46         unsigned long bp[4];
  47         int singlestep;
  48 };
  49
  50 /*
  51  * It would be nice to use something smarter than a linear search, TBD...
  52  * Thankfully we dont expect many devices to register (famous last words :),
  53  * so until then it will suffice.  At least its abstracted so we can change
  54  * in one place.
  55  */
  56 struct kvm_io_bus {
  57         int                   dev_count;
  58 #define NR_IOBUS_DEVS 6
  59         struct kvm_io_device *devs[NR_IOBUS_DEVS];
  60 };
  61
  62 void kvm_io_bus_init(struct kvm_io_bus *bus);
  63 void kvm_io_bus_destroy(struct kvm_io_bus *bus);
  64 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
  65 void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
  66                              struct kvm_io_device *dev);
  67
  68 struct kvm_vcpu {
  69         struct kvm *kvm;
  70         struct preempt_notifier preempt_notifier;
  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         struct kvm_guest_debug 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
  97 struct 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         unsigned long userspace_addr;
 104         int user_alloc;
 105 };
 106
 107 struct kvm {
 108         struct mutex lock; /* protects the vcpus array and APIC accesses */
 109         spinlock_t mmu_lock;
 110         struct rw_semaphore slots_lock;
 111         struct mm_struct *mm; /* userspace tied to this vm */
 112         int nmemslots;
 113         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 114                                         KVM_PRIVATE_MEM_SLOTS];
 115         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 116         struct list_head vm_list;
 117         struct file *filp;
 118         struct kvm_io_bus mmio_bus;
 119         struct kvm_io_bus pio_bus;
 120         struct kvm_vm_stat stat;
 121         struct kvm_arch arch;
 122 };
 123
 124 /* The guest did something we don't support. */
 125 #define pr_unimpl(vcpu, fmt, ...)                                       \
 126  do {                                                                   \
 127         if (printk_ratelimit())                                         \
 128                 printk(KERN_ERR "kvm: %i: cpu%i " fmt,                  \
 129                        current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 130  } while (0)
 131
 132 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 133 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 134
 135 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 136 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 137
 138 void vcpu_load(struct kvm_vcpu *vcpu);
 139 void vcpu_put(struct kvm_vcpu *vcpu);
 140
 141 void decache_vcpus_on_cpu(int cpu);
 142
 143
 144 int kvm_init(void *opaque, unsigned int vcpu_size,
 145                   struct module *module);
 146 void kvm_exit(void);
 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
 155 int is_error_page(struct page *page);
 156 int kvm_is_error_hva(unsigned long addr);
 157 int kvm_set_memory_region(struct kvm *kvm,
 158                           struct kvm_userspace_memory_region *mem,
 159                           int user_alloc);
 160 int __kvm_set_memory_region(struct kvm *kvm,
 161                             struct kvm_userspace_memory_region *mem,
 162                             int user_alloc);
 163 int kvm_arch_set_memory_region(struct kvm *kvm,
 164                                 struct kvm_userspace_memory_region *mem,
 165                                 struct kvm_memory_slot old,
 166                                 int user_alloc);
 167 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
 168 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 169 void kvm_release_page_clean(struct page *page);
 170 void kvm_release_page_dirty(struct page *page);
 171 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 172                         int len);
 173 int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
 174                           unsigned long len);
 175 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 176 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 177                          int offset, int len);
 178 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 179                     unsigned long len);
 180 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 181 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 182 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 183 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 184 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 185
 186 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 187 void kvm_resched(struct kvm_vcpu *vcpu);
 188 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 189 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 190 void kvm_flush_remote_tlbs(struct kvm *kvm);
 191
 192 long kvm_arch_dev_ioctl(struct file *filp,
 193                         unsigned int ioctl, unsigned long arg);
 194 long kvm_arch_vcpu_ioctl(struct file *filp,
 195                          unsigned int ioctl, unsigned long arg);
 196 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 197 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 198
 199 int kvm_dev_ioctl_check_extension(long ext);
 200
 201 int kvm_get_dirty_log(struct kvm *kvm,
 202                         struct kvm_dirty_log *log, int *is_dirty);
 203 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 204                                 struct kvm_dirty_log *log);
 205
 206 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 207                                    struct
 208                                    kvm_userspace_memory_region *mem,
 209                                    int user_alloc);
 210 long kvm_arch_vm_ioctl(struct file *filp,
 211                        unsigned int ioctl, unsigned long arg);
 212 void kvm_arch_destroy_vm(struct kvm *kvm);
 213
 214 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 215 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 216
 217 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 218                                     struct kvm_translation *tr);
 219
 220 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 221 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 222 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 223                                   struct kvm_sregs *sregs);
 224 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 225                                   struct kvm_sregs *sregs);
 226 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
 227                                     struct kvm_debug_guest *dbg);
 228 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 229
 230 int kvm_arch_init(void *opaque);
 231 void kvm_arch_exit(void);
 232
 233 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 234 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 235
 236 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 237 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 238 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 239 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 240 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 241 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 242
 243 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 244 void kvm_arch_hardware_enable(void *garbage);
 245 void kvm_arch_hardware_disable(void *garbage);
 246 int kvm_arch_hardware_setup(void);
 247 void kvm_arch_hardware_unsetup(void);
 248 void kvm_arch_check_processor_compat(void *rtn);
 249 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 250
 251 void kvm_free_physmem(struct kvm *kvm);
 252
 253 struct  kvm *kvm_arch_create_vm(void);
 254 void kvm_arch_destroy_vm(struct kvm *kvm);
 255
 256 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
 257 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
 258 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 259
 260 static inline void kvm_guest_enter(void)
 261 {
 262         account_system_vtime(current);
 263         current->flags |= PF_VCPU;
 264 }
 265
 266 static inline void kvm_guest_exit(void)
 267 {
 268         account_system_vtime(current);
 269         current->flags &= ~PF_VCPU;
 270 }
 271
 272 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
 273 {
 274         return slot - kvm->memslots;
 275 }
 276
 277 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 278 {
 279         return (gpa_t)gfn << PAGE_SHIFT;
 280 }
 281
 282 static inline void kvm_migrate_apic_timer(struct kvm_vcpu *vcpu)
 283 {
 284         set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
 285 }
 286
 287 enum kvm_stat_kind {
 288         KVM_STAT_VM,
 289         KVM_STAT_VCPU,
 290 };
 291
 292 struct kvm_stats_debugfs_item {
 293         const char *name;
 294         int offset;
 295         enum kvm_stat_kind kind;
 296         struct dentry *dentry;
 297 };
 298 extern struct kvm_stats_debugfs_item debugfs_entries[];
 299
 300 #endif