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