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