include/linux/kvm.h

   1 #ifndef __LINUX_KVM_H
   2 #define __LINUX_KVM_H
   3
   4 /*
   5  * Userspace interface for /dev/kvm - kernel based virtual machine
   6  *
   7  * Note: this interface is considered experimental and may change without
   8  *       notice.
   9  */
  10
  11 #include <asm/types.h>
  12 #include <linux/ioctl.h>
  13
  14 #define KVM_API_VERSION 12
  15
  16 /*
  17  * Architectural interrupt line count, and the size of the bitmap needed
  18  * to hold them.
  19  */
  20 #define KVM_NR_INTERRUPTS 256
  21 #define KVM_IRQ_BITMAP_SIZE_BYTES    ((KVM_NR_INTERRUPTS + 7) / 8)
  22 #define KVM_IRQ_BITMAP_SIZE(type)    (KVM_IRQ_BITMAP_SIZE_BYTES / sizeof(type))
  23
  24
  25 /* for KVM_CREATE_MEMORY_REGION */
  26 struct kvm_memory_region {
  27         __u32 slot;
  28         __u32 flags;
  29         __u64 guest_phys_addr;
  30         __u64 memory_size; /* bytes */
  31 };
  32
  33 /* for kvm_memory_region::flags */
  34 #define KVM_MEM_LOG_DIRTY_PAGES  1UL
  35
  36 struct kvm_memory_alias {
  37         __u32 slot;  /* this has a different namespace than memory slots */
  38         __u32 flags;
  39         __u64 guest_phys_addr;
  40         __u64 memory_size;
  41         __u64 target_phys_addr;
  42 };
  43
  44 enum kvm_exit_reason {
  45         KVM_EXIT_UNKNOWN          = 0,
  46         KVM_EXIT_EXCEPTION        = 1,
  47         KVM_EXIT_IO               = 2,
  48         KVM_EXIT_HYPERCALL        = 3,
  49         KVM_EXIT_DEBUG            = 4,
  50         KVM_EXIT_HLT              = 5,
  51         KVM_EXIT_MMIO             = 6,
  52         KVM_EXIT_IRQ_WINDOW_OPEN  = 7,
  53         KVM_EXIT_SHUTDOWN         = 8,
  54         KVM_EXIT_FAIL_ENTRY       = 9,
  55         KVM_EXIT_INTR             = 10,
  56 };
  57
  58 /* for KVM_RUN, returned by mmap(vcpu_fd, offset=0) */
  59 struct kvm_run {
  60         /* in */
  61         __u8 request_interrupt_window;
  62         __u8 padding1[7];
  63
  64         /* out */
  65         __u32 exit_reason;
  66         __u8 ready_for_interrupt_injection;
  67         __u8 if_flag;
  68         __u8 padding2[2];
  69
  70         /* in (pre_kvm_run), out (post_kvm_run) */
  71         __u64 cr8;
  72         __u64 apic_base;
  73
  74         union {
  75                 /* KVM_EXIT_UNKNOWN */
  76                 struct {
  77                         __u64 hardware_exit_reason;
  78                 } hw;
  79                 /* KVM_EXIT_FAIL_ENTRY */
  80                 struct {
  81                         __u64 hardware_entry_failure_reason;
  82                 } fail_entry;
  83                 /* KVM_EXIT_EXCEPTION */
  84                 struct {
  85                         __u32 exception;
  86                         __u32 error_code;
  87                 } ex;
  88                 /* KVM_EXIT_IO */
  89                 struct kvm_io {
  90 #define KVM_EXIT_IO_IN  0
  91 #define KVM_EXIT_IO_OUT 1
  92                         __u8 direction;
  93                         __u8 size; /* bytes */
  94                         __u16 port;
  95                         __u32 count;
  96                         __u64 data_offset; /* relative to kvm_run start */
  97                 } io;
  98                 struct {
  99                 } debug;
 100                 /* KVM_EXIT_MMIO */
 101                 struct {
 102                         __u64 phys_addr;
 103                         __u8  data[8];
 104                         __u32 len;
 105                         __u8  is_write;
 106                 } mmio;
 107                 /* KVM_EXIT_HYPERCALL */
 108                 struct {
 109                         __u64 args[6];
 110                         __u64 ret;
 111                         __u32 longmode;
 112                         __u32 pad;
 113                 } hypercall;
 114         };
 115 };
 116
 117 /* for KVM_GET_REGS and KVM_SET_REGS */
 118 struct kvm_regs {
 119         /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
 120         __u64 rax, rbx, rcx, rdx;
 121         __u64 rsi, rdi, rsp, rbp;
 122         __u64 r8,  r9,  r10, r11;
 123         __u64 r12, r13, r14, r15;
 124         __u64 rip, rflags;
 125 };
 126
 127 /* for KVM_GET_FPU and KVM_SET_FPU */
 128 struct kvm_fpu {
 129         __u8  fpr[8][16];
 130         __u16 fcw;
 131         __u16 fsw;
 132         __u8  ftwx;  /* in fxsave format */
 133         __u8  pad1;
 134         __u16 last_opcode;
 135         __u64 last_ip;
 136         __u64 last_dp;
 137         __u8  xmm[16][16];
 138         __u32 mxcsr;
 139         __u32 pad2;
 140 };
 141
 142 struct kvm_segment {
 143         __u64 base;
 144         __u32 limit;
 145         __u16 selector;
 146         __u8  type;
 147         __u8  present, dpl, db, s, l, g, avl;
 148         __u8  unusable;
 149         __u8  padding;
 150 };
 151
 152 struct kvm_dtable {
 153         __u64 base;
 154         __u16 limit;
 155         __u16 padding[3];
 156 };
 157
 158 /* for KVM_GET_SREGS and KVM_SET_SREGS */
 159 struct kvm_sregs {
 160         /* out (KVM_GET_SREGS) / in (KVM_SET_SREGS) */
 161         struct kvm_segment cs, ds, es, fs, gs, ss;
 162         struct kvm_segment tr, ldt;
 163         struct kvm_dtable gdt, idt;
 164         __u64 cr0, cr2, cr3, cr4, cr8;
 165         __u64 efer;
 166         __u64 apic_base;
 167         __u64 interrupt_bitmap[KVM_IRQ_BITMAP_SIZE(__u64)];
 168 };
 169
 170 struct kvm_msr_entry {
 171         __u32 index;
 172         __u32 reserved;
 173         __u64 data;
 174 };
 175
 176 /* for KVM_GET_MSRS and KVM_SET_MSRS */
 177 struct kvm_msrs {
 178         __u32 nmsrs; /* number of msrs in entries */
 179         __u32 pad;
 180
 181         struct kvm_msr_entry entries[0];
 182 };
 183
 184 /* for KVM_GET_MSR_INDEX_LIST */
 185 struct kvm_msr_list {
 186         __u32 nmsrs; /* number of msrs in entries */
 187         __u32 indices[0];
 188 };
 189
 190 /* for KVM_TRANSLATE */
 191 struct kvm_translation {
 192         /* in */
 193         __u64 linear_address;
 194
 195         /* out */
 196         __u64 physical_address;
 197         __u8  valid;
 198         __u8  writeable;
 199         __u8  usermode;
 200         __u8  pad[5];
 201 };
 202
 203 /* for KVM_INTERRUPT */
 204 struct kvm_interrupt {
 205         /* in */
 206         __u32 irq;
 207 };
 208
 209 struct kvm_breakpoint {
 210         __u32 enabled;
 211         __u32 padding;
 212         __u64 address;
 213 };
 214
 215 /* for KVM_DEBUG_GUEST */
 216 struct kvm_debug_guest {
 217         /* int */
 218         __u32 enabled;
 219         __u32 pad;
 220         struct kvm_breakpoint breakpoints[4];
 221         __u32 singlestep;
 222 };
 223
 224 /* for KVM_GET_DIRTY_LOG */
 225 struct kvm_dirty_log {
 226         __u32 slot;
 227         __u32 padding;
 228         union {
 229                 void __user *dirty_bitmap; /* one bit per page */
 230                 __u64 padding;
 231         };
 232 };
 233
 234 struct kvm_cpuid_entry {
 235         __u32 function;
 236         __u32 eax;
 237         __u32 ebx;
 238         __u32 ecx;
 239         __u32 edx;
 240         __u32 padding;
 241 };
 242
 243 /* for KVM_SET_CPUID */
 244 struct kvm_cpuid {
 245         __u32 nent;
 246         __u32 padding;
 247         struct kvm_cpuid_entry entries[0];
 248 };
 249
 250 /* for KVM_SET_SIGNAL_MASK */
 251 struct kvm_signal_mask {
 252         __u32 len;
 253         __u8  sigset[0];
 254 };
 255
 256 #define KVMIO 0xAE
 257
 258 /*
 259  * ioctls for /dev/kvm fds:
 260  */
 261 #define KVM_GET_API_VERSION       _IO(KVMIO,   0x00)
 262 #define KVM_CREATE_VM             _IO(KVMIO,   0x01) /* returns a VM fd */
 263 #define KVM_GET_MSR_INDEX_LIST    _IOWR(KVMIO, 0x02, struct kvm_msr_list)
 264 /*
 265  * Check if a kvm extension is available.  Argument is extension number,
 266  * return is 1 (yes) or 0 (no, sorry).
 267  */
 268 #define KVM_CHECK_EXTENSION       _IO(KVMIO,   0x03)
 269 /*
 270  * Get size for mmap(vcpu_fd)
 271  */
 272 #define KVM_GET_VCPU_MMAP_SIZE    _IO(KVMIO,   0x04) /* in bytes */
 273
 274 /*
 275  * ioctls for VM fds
 276  */
 277 #define KVM_SET_MEMORY_REGION     _IOW(KVMIO, 0x40, struct kvm_memory_region)
 278 /*
 279  * KVM_CREATE_VCPU receives as a parameter the vcpu slot, and returns
 280  * a vcpu fd.
 281  */
 282 #define KVM_CREATE_VCPU           _IO(KVMIO,  0x41)
 283 #define KVM_GET_DIRTY_LOG         _IOW(KVMIO, 0x42, struct kvm_dirty_log)
 284 #define KVM_SET_MEMORY_ALIAS      _IOW(KVMIO, 0x43, struct kvm_memory_alias)
 285
 286 /*
 287  * ioctls for vcpu fds
 288  */
 289 #define KVM_RUN                   _IO(KVMIO,   0x80)
 290 #define KVM_GET_REGS              _IOR(KVMIO,  0x81, struct kvm_regs)
 291 #define KVM_SET_REGS              _IOW(KVMIO,  0x82, struct kvm_regs)
 292 #define KVM_GET_SREGS             _IOR(KVMIO,  0x83, struct kvm_sregs)
 293 #define KVM_SET_SREGS             _IOW(KVMIO,  0x84, struct kvm_sregs)
 294 #define KVM_TRANSLATE             _IOWR(KVMIO, 0x85, struct kvm_translation)
 295 #define KVM_INTERRUPT             _IOW(KVMIO,  0x86, struct kvm_interrupt)
 296 #define KVM_DEBUG_GUEST           _IOW(KVMIO,  0x87, struct kvm_debug_guest)
 297 #define KVM_GET_MSRS              _IOWR(KVMIO, 0x88, struct kvm_msrs)
 298 #define KVM_SET_MSRS              _IOW(KVMIO,  0x89, struct kvm_msrs)
 299 #define KVM_SET_CPUID             _IOW(KVMIO,  0x8a, struct kvm_cpuid)
 300 #define KVM_SET_SIGNAL_MASK       _IOW(KVMIO,  0x8b, struct kvm_signal_mask)
 301 #define KVM_GET_FPU               _IOR(KVMIO,  0x8c, struct kvm_fpu)
 302 #define KVM_SET_FPU               _IOW(KVMIO,  0x8d, struct kvm_fpu)
 303
 304 #endif