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 6
  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
  37 #define KVM_EXIT_TYPE_FAIL_ENTRY 1
  38 #define KVM_EXIT_TYPE_VM_EXIT    2
  39
  40 enum kvm_exit_reason {
  41         KVM_EXIT_UNKNOWN          = 0,
  42         KVM_EXIT_EXCEPTION        = 1,
  43         KVM_EXIT_IO               = 2,
  44         KVM_EXIT_DEBUG            = 4,
  45         KVM_EXIT_HLT              = 5,
  46         KVM_EXIT_MMIO             = 6,
  47         KVM_EXIT_IRQ_WINDOW_OPEN  = 7,
  48         KVM_EXIT_SHUTDOWN         = 8,
  49 };
  50
  51 /* for KVM_RUN, returned by mmap(vcpu_fd, offset=0) */
  52 struct kvm_run {
  53         /* in */
  54         __u32 io_completed; /* mmio/pio request completed */
  55         __u8 request_interrupt_window;
  56         __u8 padding1[3];
  57
  58         /* out */
  59         __u32 exit_type;
  60         __u32 exit_reason;
  61         __u32 instruction_length;
  62         __u8 ready_for_interrupt_injection;
  63         __u8 if_flag;
  64         __u16 padding2;
  65
  66         /* in (pre_kvm_run), out (post_kvm_run) */
  67         __u64 cr8;
  68         __u64 apic_base;
  69
  70         union {
  71                 /* KVM_EXIT_UNKNOWN */
  72                 struct {
  73                         __u32 hardware_exit_reason;
  74                 } hw;
  75                 /* KVM_EXIT_EXCEPTION */
  76                 struct {
  77                         __u32 exception;
  78                         __u32 error_code;
  79                 } ex;
  80                 /* KVM_EXIT_IO */
  81                 struct kvm_io {
  82 #define KVM_EXIT_IO_IN  0
  83 #define KVM_EXIT_IO_OUT 1
  84                         __u8 direction;
  85                         __u8 size; /* bytes */
  86                         __u8 string;
  87                         __u8 string_down;
  88                         __u8 rep;
  89                         __u8 pad;
  90                         __u16 port;
  91                         __u64 count;
  92                         union {
  93                                 __u64 address;
  94                                 __u32 value;
  95                         };
  96                 } io;
  97                 struct {
  98                 } debug;
  99                 /* KVM_EXIT_MMIO */
 100                 struct {
 101                         __u64 phys_addr;
 102                         __u8  data[8];
 103                         __u32 len;
 104                         __u8  is_write;
 105                 } mmio;
 106         };
 107 };
 108
 109 /* for KVM_GET_REGS and KVM_SET_REGS */
 110 struct kvm_regs {
 111         /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
 112         __u64 rax, rbx, rcx, rdx;
 113         __u64 rsi, rdi, rsp, rbp;
 114         __u64 r8,  r9,  r10, r11;
 115         __u64 r12, r13, r14, r15;
 116         __u64 rip, rflags;
 117 };
 118
 119 struct kvm_segment {
 120         __u64 base;
 121         __u32 limit;
 122         __u16 selector;
 123         __u8  type;
 124         __u8  present, dpl, db, s, l, g, avl;
 125         __u8  unusable;
 126         __u8  padding;
 127 };
 128
 129 struct kvm_dtable {
 130         __u64 base;
 131         __u16 limit;
 132         __u16 padding[3];
 133 };
 134
 135 /* for KVM_GET_SREGS and KVM_SET_SREGS */
 136 struct kvm_sregs {
 137         /* out (KVM_GET_SREGS) / in (KVM_SET_SREGS) */
 138         struct kvm_segment cs, ds, es, fs, gs, ss;
 139         struct kvm_segment tr, ldt;
 140         struct kvm_dtable gdt, idt;
 141         __u64 cr0, cr2, cr3, cr4, cr8;
 142         __u64 efer;
 143         __u64 apic_base;
 144         __u64 interrupt_bitmap[KVM_IRQ_BITMAP_SIZE(__u64)];
 145 };
 146
 147 struct kvm_msr_entry {
 148         __u32 index;
 149         __u32 reserved;
 150         __u64 data;
 151 };
 152
 153 /* for KVM_GET_MSRS and KVM_SET_MSRS */
 154 struct kvm_msrs {
 155         __u32 nmsrs; /* number of msrs in entries */
 156         __u32 pad;
 157
 158         struct kvm_msr_entry entries[0];
 159 };
 160
 161 /* for KVM_GET_MSR_INDEX_LIST */
 162 struct kvm_msr_list {
 163         __u32 nmsrs; /* number of msrs in entries */
 164         __u32 indices[0];
 165 };
 166
 167 /* for KVM_TRANSLATE */
 168 struct kvm_translation {
 169         /* in */
 170         __u64 linear_address;
 171
 172         /* out */
 173         __u64 physical_address;
 174         __u8  valid;
 175         __u8  writeable;
 176         __u8  usermode;
 177         __u8  pad[5];
 178 };
 179
 180 /* for KVM_INTERRUPT */
 181 struct kvm_interrupt {
 182         /* in */
 183         __u32 irq;
 184 };
 185
 186 struct kvm_breakpoint {
 187         __u32 enabled;
 188         __u32 padding;
 189         __u64 address;
 190 };
 191
 192 /* for KVM_DEBUG_GUEST */
 193 struct kvm_debug_guest {
 194         /* int */
 195         __u32 enabled;
 196         __u32 pad;
 197         struct kvm_breakpoint breakpoints[4];
 198         __u32 singlestep;
 199 };
 200
 201 /* for KVM_GET_DIRTY_LOG */
 202 struct kvm_dirty_log {
 203         __u32 slot;
 204         __u32 padding;
 205         union {
 206                 void __user *dirty_bitmap; /* one bit per page */
 207                 __u64 padding;
 208         };
 209 };
 210
 211 struct kvm_cpuid_entry {
 212         __u32 function;
 213         __u32 eax;
 214         __u32 ebx;
 215         __u32 ecx;
 216         __u32 edx;
 217         __u32 padding;
 218 };
 219
 220 /* for KVM_SET_CPUID */
 221 struct kvm_cpuid {
 222         __u32 nent;
 223         __u32 padding;
 224         struct kvm_cpuid_entry entries[0];
 225 };
 226
 227 #define KVMIO 0xAE
 228
 229 /*
 230  * ioctls for /dev/kvm fds:
 231  */
 232 #define KVM_GET_API_VERSION       _IO(KVMIO, 1)
 233 #define KVM_CREATE_VM             _IO(KVMIO, 2) /* returns a VM fd */
 234 #define KVM_GET_MSR_INDEX_LIST    _IOWR(KVMIO, 15, struct kvm_msr_list)
 235
 236 /*
 237  * ioctls for VM fds
 238  */
 239 #define KVM_SET_MEMORY_REGION     _IOW(KVMIO, 10, struct kvm_memory_region)
 240 /*
 241  * KVM_CREATE_VCPU receives as a parameter the vcpu slot, and returns
 242  * a vcpu fd.
 243  */
 244 #define KVM_CREATE_VCPU           _IOW(KVMIO, 11, int)
 245 #define KVM_GET_DIRTY_LOG         _IOW(KVMIO, 12, struct kvm_dirty_log)
 246
 247 /*
 248  * ioctls for vcpu fds
 249  */
 250 #define KVM_RUN                   _IO(KVMIO, 16)
 251 #define KVM_GET_REGS              _IOR(KVMIO, 3, struct kvm_regs)
 252 #define KVM_SET_REGS              _IOW(KVMIO, 4, struct kvm_regs)
 253 #define KVM_GET_SREGS             _IOR(KVMIO, 5, struct kvm_sregs)
 254 #define KVM_SET_SREGS             _IOW(KVMIO, 6, struct kvm_sregs)
 255 #define KVM_TRANSLATE             _IOWR(KVMIO, 7, struct kvm_translation)
 256 #define KVM_INTERRUPT             _IOW(KVMIO, 8, struct kvm_interrupt)
 257 #define KVM_DEBUG_GUEST           _IOW(KVMIO, 9, struct kvm_debug_guest)
 258 #define KVM_GET_MSRS              _IOWR(KVMIO, 13, struct kvm_msrs)
 259 #define KVM_SET_MSRS              _IOW(KVMIO, 14, struct kvm_msrs)
 260 #define KVM_SET_CPUID             _IOW(KVMIO, 17, struct kvm_cpuid)
 261
 262 #endif