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: you must update KVM_API_VERSION if you change this interface.
   8  */
   9
  10 #include <asm/types.h>
  11 #include <linux/ioctl.h>
  12
  13 #define KVM_API_VERSION 12
  14
  15 /* Architectural interrupt line count. */
  16 #define KVM_NR_INTERRUPTS 256
  17
  18 /* for KVM_CREATE_MEMORY_REGION */
  19 struct kvm_memory_region {
  20         __u32 slot;
  21         __u32 flags;
  22         __u64 guest_phys_addr;
  23         __u64 memory_size; /* bytes */
  24 };
  25
  26 /* for kvm_memory_region::flags */
  27 #define KVM_MEM_LOG_DIRTY_PAGES  1UL
  28
  29 struct kvm_memory_alias {
  30         __u32 slot;  /* this has a different namespace than memory slots */
  31         __u32 flags;
  32         __u64 guest_phys_addr;
  33         __u64 memory_size;
  34         __u64 target_phys_addr;
  35 };
  36
  37 /* for KVM_IRQ_LINE */
  38 struct kvm_irq_level {
  39         /*
  40          * ACPI gsi notion of irq.
  41          * For IA-64 (APIC model) IOAPIC0: irq 0-23; IOAPIC1: irq 24-47..
  42          * For X86 (standard AT mode) PIC0/1: irq 0-15. IOAPIC0: 0-23..
  43          */
  44         __u32 irq;
  45         __u32 level;
  46 };
  47
  48 /* for KVM_GET_IRQCHIP and KVM_SET_IRQCHIP */
  49 struct kvm_pic_state {
  50         __u8 last_irr;  /* edge detection */
  51         __u8 irr;               /* interrupt request register */
  52         __u8 imr;               /* interrupt mask register */
  53         __u8 isr;               /* interrupt service register */
  54         __u8 priority_add;      /* highest irq priority */
  55         __u8 irq_base;
  56         __u8 read_reg_select;
  57         __u8 poll;
  58         __u8 special_mask;
  59         __u8 init_state;
  60         __u8 auto_eoi;
  61         __u8 rotate_on_auto_eoi;
  62         __u8 special_fully_nested_mode;
  63         __u8 init4;             /* true if 4 byte init */
  64         __u8 elcr;              /* PIIX edge/trigger selection */
  65         __u8 elcr_mask;
  66 };
  67
  68 #define KVM_IOAPIC_NUM_PINS  24
  69 struct kvm_ioapic_state {
  70         __u64 base_address;
  71         __u32 ioregsel;
  72         __u32 id;
  73         __u32 irr;
  74         __u32 pad;
  75         union {
  76                 __u64 bits;
  77                 struct {
  78                         __u8 vector;
  79                         __u8 delivery_mode:3;
  80                         __u8 dest_mode:1;
  81                         __u8 delivery_status:1;
  82                         __u8 polarity:1;
  83                         __u8 remote_irr:1;
  84                         __u8 trig_mode:1;
  85                         __u8 mask:1;
  86                         __u8 reserve:7;
  87                         __u8 reserved[4];
  88                         __u8 dest_id;
  89                 } fields;
  90         } redirtbl[KVM_IOAPIC_NUM_PINS];
  91 };
  92
  93 #define KVM_IRQCHIP_PIC_MASTER   0
  94 #define KVM_IRQCHIP_PIC_SLAVE    1
  95 #define KVM_IRQCHIP_IOAPIC       2
  96
  97 struct kvm_irqchip {
  98         __u32 chip_id;
  99         __u32 pad;
 100         union {
 101                 char dummy[512];  /* reserving space */
 102                 struct kvm_pic_state pic;
 103                 struct kvm_ioapic_state ioapic;
 104         } chip;
 105 };
 106
 107 #define KVM_EXIT_UNKNOWN          0
 108 #define KVM_EXIT_EXCEPTION        1
 109 #define KVM_EXIT_IO               2
 110 #define KVM_EXIT_HYPERCALL        3
 111 #define KVM_EXIT_DEBUG            4
 112 #define KVM_EXIT_HLT              5
 113 #define KVM_EXIT_MMIO             6
 114 #define KVM_EXIT_IRQ_WINDOW_OPEN  7
 115 #define KVM_EXIT_SHUTDOWN         8
 116 #define KVM_EXIT_FAIL_ENTRY       9
 117 #define KVM_EXIT_INTR             10
 118 #define KVM_EXIT_SET_TPR          11
 119
 120 /* for KVM_RUN, returned by mmap(vcpu_fd, offset=0) */
 121 struct kvm_run {
 122         /* in */
 123         __u8 request_interrupt_window;
 124         __u8 padding1[7];
 125
 126         /* out */
 127         __u32 exit_reason;
 128         __u8 ready_for_interrupt_injection;
 129         __u8 if_flag;
 130         __u8 padding2[2];
 131
 132         /* in (pre_kvm_run), out (post_kvm_run) */
 133         __u64 cr8;
 134         __u64 apic_base;
 135
 136         union {
 137                 /* KVM_EXIT_UNKNOWN */
 138                 struct {
 139                         __u64 hardware_exit_reason;
 140                 } hw;
 141                 /* KVM_EXIT_FAIL_ENTRY */
 142                 struct {
 143                         __u64 hardware_entry_failure_reason;
 144                 } fail_entry;
 145                 /* KVM_EXIT_EXCEPTION */
 146                 struct {
 147                         __u32 exception;
 148                         __u32 error_code;
 149                 } ex;
 150                 /* KVM_EXIT_IO */
 151                 struct kvm_io {
 152 #define KVM_EXIT_IO_IN  0
 153 #define KVM_EXIT_IO_OUT 1
 154                         __u8 direction;
 155                         __u8 size; /* bytes */
 156                         __u16 port;
 157                         __u32 count;
 158                         __u64 data_offset; /* relative to kvm_run start */
 159                 } io;
 160                 struct {
 161                 } debug;
 162                 /* KVM_EXIT_MMIO */
 163                 struct {
 164                         __u64 phys_addr;
 165                         __u8  data[8];
 166                         __u32 len;
 167                         __u8  is_write;
 168                 } mmio;
 169                 /* KVM_EXIT_HYPERCALL */
 170                 struct {
 171                         __u64 nr;
 172                         __u64 args[6];
 173                         __u64 ret;
 174                         __u32 longmode;
 175                         __u32 pad;
 176                 } hypercall;
 177                 /* Fix the size of the union. */
 178                 char padding[256];
 179         };
 180 };
 181
 182 /* for KVM_GET_REGS and KVM_SET_REGS */
 183 struct kvm_regs {
 184         /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
 185         __u64 rax, rbx, rcx, rdx;
 186         __u64 rsi, rdi, rsp, rbp;
 187         __u64 r8,  r9,  r10, r11;
 188         __u64 r12, r13, r14, r15;
 189         __u64 rip, rflags;
 190 };
 191
 192 /* for KVM_GET_FPU and KVM_SET_FPU */
 193 struct kvm_fpu {
 194         __u8  fpr[8][16];
 195         __u16 fcw;
 196         __u16 fsw;
 197         __u8  ftwx;  /* in fxsave format */
 198         __u8  pad1;
 199         __u16 last_opcode;
 200         __u64 last_ip;
 201         __u64 last_dp;
 202         __u8  xmm[16][16];
 203         __u32 mxcsr;
 204         __u32 pad2;
 205 };
 206
 207 /* for KVM_GET_LAPIC and KVM_SET_LAPIC */
 208 #define KVM_APIC_REG_SIZE 0x400
 209 struct kvm_lapic_state {
 210         char regs[KVM_APIC_REG_SIZE];
 211 };
 212
 213 struct kvm_segment {
 214         __u64 base;
 215         __u32 limit;
 216         __u16 selector;
 217         __u8  type;
 218         __u8  present, dpl, db, s, l, g, avl;
 219         __u8  unusable;
 220         __u8  padding;
 221 };
 222
 223 struct kvm_dtable {
 224         __u64 base;
 225         __u16 limit;
 226         __u16 padding[3];
 227 };
 228
 229 /* for KVM_GET_SREGS and KVM_SET_SREGS */
 230 struct kvm_sregs {
 231         /* out (KVM_GET_SREGS) / in (KVM_SET_SREGS) */
 232         struct kvm_segment cs, ds, es, fs, gs, ss;
 233         struct kvm_segment tr, ldt;
 234         struct kvm_dtable gdt, idt;
 235         __u64 cr0, cr2, cr3, cr4, cr8;
 236         __u64 efer;
 237         __u64 apic_base;
 238         __u64 interrupt_bitmap[(KVM_NR_INTERRUPTS + 63) / 64];
 239 };
 240
 241 struct kvm_msr_entry {
 242         __u32 index;
 243         __u32 reserved;
 244         __u64 data;
 245 };
 246
 247 /* for KVM_GET_MSRS and KVM_SET_MSRS */
 248 struct kvm_msrs {
 249         __u32 nmsrs; /* number of msrs in entries */
 250         __u32 pad;
 251
 252         struct kvm_msr_entry entries[0];
 253 };
 254
 255 /* for KVM_GET_MSR_INDEX_LIST */
 256 struct kvm_msr_list {
 257         __u32 nmsrs; /* number of msrs in entries */
 258         __u32 indices[0];
 259 };
 260
 261 /* for KVM_TRANSLATE */
 262 struct kvm_translation {
 263         /* in */
 264         __u64 linear_address;
 265
 266         /* out */
 267         __u64 physical_address;
 268         __u8  valid;
 269         __u8  writeable;
 270         __u8  usermode;
 271         __u8  pad[5];
 272 };
 273
 274 /* for KVM_INTERRUPT */
 275 struct kvm_interrupt {
 276         /* in */
 277         __u32 irq;
 278 };
 279
 280 struct kvm_breakpoint {
 281         __u32 enabled;
 282         __u32 padding;
 283         __u64 address;
 284 };
 285
 286 /* for KVM_DEBUG_GUEST */
 287 struct kvm_debug_guest {
 288         /* int */
 289         __u32 enabled;
 290         __u32 pad;
 291         struct kvm_breakpoint breakpoints[4];
 292         __u32 singlestep;
 293 };
 294
 295 /* for KVM_GET_DIRTY_LOG */
 296 struct kvm_dirty_log {
 297         __u32 slot;
 298         __u32 padding;
 299         union {
 300                 void __user *dirty_bitmap; /* one bit per page */
 301                 __u64 padding;
 302         };
 303 };
 304
 305 struct kvm_cpuid_entry {
 306         __u32 function;
 307         __u32 eax;
 308         __u32 ebx;
 309         __u32 ecx;
 310         __u32 edx;
 311         __u32 padding;
 312 };
 313
 314 /* for KVM_SET_CPUID */
 315 struct kvm_cpuid {
 316         __u32 nent;
 317         __u32 padding;
 318         struct kvm_cpuid_entry entries[0];
 319 };
 320
 321 /* for KVM_SET_SIGNAL_MASK */
 322 struct kvm_signal_mask {
 323         __u32 len;
 324         __u8  sigset[0];
 325 };
 326
 327 #define KVMIO 0xAE
 328
 329 /*
 330  * ioctls for /dev/kvm fds:
 331  */
 332 #define KVM_GET_API_VERSION       _IO(KVMIO,   0x00)
 333 #define KVM_CREATE_VM             _IO(KVMIO,   0x01) /* returns a VM fd */
 334 #define KVM_GET_MSR_INDEX_LIST    _IOWR(KVMIO, 0x02, struct kvm_msr_list)
 335 /*
 336  * Check if a kvm extension is available.  Argument is extension number,
 337  * return is 1 (yes) or 0 (no, sorry).
 338  */
 339 #define KVM_CHECK_EXTENSION       _IO(KVMIO,   0x03)
 340 /*
 341  * Get size for mmap(vcpu_fd)
 342  */
 343 #define KVM_GET_VCPU_MMAP_SIZE    _IO(KVMIO,   0x04) /* in bytes */
 344
 345 /*
 346  * Extension capability list.
 347  */
 348 #define KVM_CAP_IRQCHIP   0
 349 #define KVM_CAP_HLT       1
 350 #define KVM_CAP_MMU_SHADOW_CACHE_CONTROL 2
 351
 352 /*
 353  * ioctls for VM fds
 354  */
 355 #define KVM_SET_MEMORY_REGION     _IOW(KVMIO, 0x40, struct kvm_memory_region)
 356 #define KVM_SET_NR_MMU_PAGES      _IO(KVMIO, 0x44)
 357 #define KVM_GET_NR_MMU_PAGES      _IO(KVMIO, 0x45)
 358 /*
 359  * KVM_CREATE_VCPU receives as a parameter the vcpu slot, and returns
 360  * a vcpu fd.
 361  */
 362 #define KVM_CREATE_VCPU           _IO(KVMIO,  0x41)
 363 #define KVM_GET_DIRTY_LOG         _IOW(KVMIO, 0x42, struct kvm_dirty_log)
 364 #define KVM_SET_MEMORY_ALIAS      _IOW(KVMIO, 0x43, struct kvm_memory_alias)
 365 /* Device model IOC */
 366 #define KVM_CREATE_IRQCHIP        _IO(KVMIO,  0x60)
 367 #define KVM_IRQ_LINE              _IOW(KVMIO, 0x61, struct kvm_irq_level)
 368 #define KVM_GET_IRQCHIP           _IOWR(KVMIO, 0x62, struct kvm_irqchip)
 369 #define KVM_SET_IRQCHIP           _IOR(KVMIO,  0x63, struct kvm_irqchip)
 370
 371 /*
 372  * ioctls for vcpu fds
 373  */
 374 #define KVM_RUN                   _IO(KVMIO,   0x80)
 375 #define KVM_GET_REGS              _IOR(KVMIO,  0x81, struct kvm_regs)
 376 #define KVM_SET_REGS              _IOW(KVMIO,  0x82, struct kvm_regs)
 377 #define KVM_GET_SREGS             _IOR(KVMIO,  0x83, struct kvm_sregs)
 378 #define KVM_SET_SREGS             _IOW(KVMIO,  0x84, struct kvm_sregs)
 379 #define KVM_TRANSLATE             _IOWR(KVMIO, 0x85, struct kvm_translation)
 380 #define KVM_INTERRUPT             _IOW(KVMIO,  0x86, struct kvm_interrupt)
 381 #define KVM_DEBUG_GUEST           _IOW(KVMIO,  0x87, struct kvm_debug_guest)
 382 #define KVM_GET_MSRS              _IOWR(KVMIO, 0x88, struct kvm_msrs)
 383 #define KVM_SET_MSRS              _IOW(KVMIO,  0x89, struct kvm_msrs)
 384 #define KVM_SET_CPUID             _IOW(KVMIO,  0x8a, struct kvm_cpuid)
 385 #define KVM_SET_SIGNAL_MASK       _IOW(KVMIO,  0x8b, struct kvm_signal_mask)
 386 #define KVM_GET_FPU               _IOR(KVMIO,  0x8c, struct kvm_fpu)
 387 #define KVM_SET_FPU               _IOW(KVMIO,  0x8d, struct kvm_fpu)
 388 #define KVM_GET_LAPIC             _IOR(KVMIO,  0x8e, struct kvm_lapic_state)
 389 #define KVM_SET_LAPIC             _IOW(KVMIO,  0x8f, struct kvm_lapic_state)
 390
 391 #endif