drivers/kvm/kvm.h

   1 #ifndef __KVM_H
   2 #define __KVM_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 "types.h"
  24
  25 #include "x86.h"
  26
  27 #define KVM_MAX_VCPUS 4
  28 #define KVM_ALIAS_SLOTS 4
  29 #define KVM_MEMORY_SLOTS 8
  30 /* memory slots that does not exposed to userspace */
  31 #define KVM_PRIVATE_MEM_SLOTS 4
  32
  33 #define KVM_PIO_PAGE_OFFSET 1
  34
  35 /*
  36  * vcpu->requests bit members
  37  */
  38 #define KVM_REQ_TLB_FLUSH          0
  39
  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_mem_alias {
  98         gfn_t base_gfn;
  99         unsigned long npages;
 100         gfn_t target_gfn;
 101 };
 102
 103 struct kvm_memory_slot {
 104         gfn_t base_gfn;
 105         unsigned long npages;
 106         unsigned long flags;
 107         unsigned long *rmap;
 108         unsigned long *dirty_bitmap;
 109         unsigned long userspace_addr;
 110         int user_alloc;
 111 };
 112
 113 struct kvm_vm_stat {
 114         u32 mmu_shadow_zapped;
 115         u32 mmu_pte_write;
 116         u32 mmu_pte_updated;
 117         u32 mmu_pde_zapped;
 118         u32 mmu_flooded;
 119         u32 mmu_recycled;
 120         u32 remote_tlb_flush;
 121 };
 122
 123 struct kvm {
 124         struct mutex lock; /* protects everything except vcpus */
 125         struct mm_struct *mm; /* userspace tied to this vm */
 126         int naliases;
 127         struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
 128         int nmemslots;
 129         struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS +
 130                                         KVM_PRIVATE_MEM_SLOTS];
 131         /*
 132          * Hash table of struct kvm_mmu_page.
 133          */
 134         struct list_head active_mmu_pages;
 135         unsigned int n_free_mmu_pages;
 136         unsigned int n_requested_mmu_pages;
 137         unsigned int n_alloc_mmu_pages;
 138         struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
 139         struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
 140         struct list_head vm_list;
 141         struct file *filp;
 142         struct kvm_io_bus mmio_bus;
 143         struct kvm_io_bus pio_bus;
 144         struct kvm_pic *vpic;
 145         struct kvm_ioapic *vioapic;
 146         int round_robin_prev_vcpu;
 147         unsigned int tss_addr;
 148         struct page *apic_access_page;
 149         struct kvm_vm_stat stat;
 150 };
 151
 152 /* The guest did something we don't support. */
 153 #define pr_unimpl(vcpu, fmt, ...)                                       \
 154  do {                                                                   \
 155         if (printk_ratelimit())                                         \
 156                 printk(KERN_ERR "kvm: %i: cpu%i " fmt,                  \
 157                        current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
 158  } while (0)
 159
 160 #define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
 161 #define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
 162
 163 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 164 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 165
 166 void vcpu_load(struct kvm_vcpu *vcpu);
 167 void vcpu_put(struct kvm_vcpu *vcpu);
 168
 169 void decache_vcpus_on_cpu(int cpu);
 170
 171
 172 int kvm_init(void *opaque, unsigned int vcpu_size,
 173                   struct module *module);
 174 void kvm_exit(void);
 175
 176 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
 177 #define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
 178 static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
 179 struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
 180
 181 extern struct page *bad_page;
 182
 183 int is_error_page(struct page *page);
 184 int kvm_is_error_hva(unsigned long addr);
 185 int kvm_set_memory_region(struct kvm *kvm,
 186                           struct kvm_userspace_memory_region *mem,
 187                           int user_alloc);
 188 int __kvm_set_memory_region(struct kvm *kvm,
 189                             struct kvm_userspace_memory_region *mem,
 190                             int user_alloc);
 191 int kvm_arch_set_memory_region(struct kvm *kvm,
 192                                 struct kvm_userspace_memory_region *mem,
 193                                 struct kvm_memory_slot old,
 194                                 int user_alloc);
 195 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
 196 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 197 void kvm_release_page_clean(struct page *page);
 198 void kvm_release_page_dirty(struct page *page);
 199 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
 200                         int len);
 201 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
 202 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
 203                          int offset, int len);
 204 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
 205                     unsigned long len);
 206 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 207 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 208 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 209 int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 210 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 211
 212 void kvm_vcpu_block(struct kvm_vcpu *vcpu);
 213 void kvm_resched(struct kvm_vcpu *vcpu);
 214 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
 215 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
 216 void kvm_flush_remote_tlbs(struct kvm *kvm);
 217
 218 long kvm_arch_dev_ioctl(struct file *filp,
 219                         unsigned int ioctl, unsigned long arg);
 220 long kvm_arch_vcpu_ioctl(struct file *filp,
 221                          unsigned int ioctl, unsigned long arg);
 222 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 223 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 224
 225 int kvm_dev_ioctl_check_extension(long ext);
 226
 227 int kvm_get_dirty_log(struct kvm *kvm,
 228                         struct kvm_dirty_log *log, int *is_dirty);
 229 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 230                                 struct kvm_dirty_log *log);
 231
 232 int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
 233                                    struct
 234                                    kvm_userspace_memory_region *mem,
 235                                    int user_alloc);
 236 long kvm_arch_vm_ioctl(struct file *filp,
 237                        unsigned int ioctl, unsigned long arg);
 238 void kvm_arch_destroy_vm(struct kvm *kvm);
 239
 240 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 241 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
 242
 243 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 244                                     struct kvm_translation *tr);
 245
 246 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 247 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
 248 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 249                                   struct kvm_sregs *sregs);
 250 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 251                                   struct kvm_sregs *sregs);
 252 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
 253                                     struct kvm_debug_guest *dbg);
 254 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 255
 256 int kvm_arch_init(void *opaque);
 257 void kvm_arch_exit(void);
 258
 259 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
 260 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
 261
 262 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
 263 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 264 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
 265 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
 266 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
 267 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
 268
 269 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
 270 void kvm_arch_hardware_enable(void *garbage);
 271 void kvm_arch_hardware_disable(void *garbage);
 272 int kvm_arch_hardware_setup(void);
 273 void kvm_arch_hardware_unsetup(void);
 274 void kvm_arch_check_processor_compat(void *rtn);
 275 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
 276
 277 void kvm_free_physmem(struct kvm *kvm);
 278
 279 struct  kvm *kvm_arch_create_vm(void);
 280 void kvm_arch_destroy_vm(struct kvm *kvm);
 281
 282 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
 283 int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
 284
 285 static inline void kvm_guest_enter(void)
 286 {
 287         account_system_vtime(current);
 288         current->flags |= PF_VCPU;
 289 }
 290
 291 static inline void kvm_guest_exit(void)
 292 {
 293         account_system_vtime(current);
 294         current->flags &= ~PF_VCPU;
 295 }
 296
 297 static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
 298 {
 299         return slot - kvm->memslots;
 300 }
 301
 302 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 303 {
 304         return (gpa_t)gfn << PAGE_SHIFT;
 305 }
 306
 307 enum kvm_stat_kind {
 308         KVM_STAT_VM,
 309         KVM_STAT_VCPU,
 310 };
 311
 312 struct kvm_stats_debugfs_item {
 313         const char *name;
 314         int offset;
 315         enum kvm_stat_kind kind;
 316         struct dentry *dentry;
 317 };
 318 extern struct kvm_stats_debugfs_item debugfs_entries[];
 319
 320 #endif