include/migration/vmstate.h

   1 /*
   2  * QEMU migration/snapshot declarations
   3  *
   4  * Copyright (c) 2009-2011 Red Hat, Inc.
   5  *
   6  * Original author: Juan Quintela <quintela@redhat.com>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  */
  26 #ifndef QEMU_VMSTATE_H
  27 #define QEMU_VMSTATE_H 1
  28
  29 #ifndef CONFIG_USER_ONLY
  30 #include <migration/qemu-file.h>
  31 #endif
  32
  33 typedef void SaveStateHandler(QEMUFile *f, void *opaque);
  34 typedef int LoadStateHandler(QEMUFile *f, void *opaque, int version_id);
  35
  36 typedef struct SaveVMHandlers {
  37     /* This runs inside the iothread lock.  */
  38     void (*set_params)(const MigrationParams *params, void * opaque);
  39     SaveStateHandler *save_state;
  40
  41     void (*cancel)(void *opaque);
  42     int (*save_live_complete)(QEMUFile *f, void *opaque);
  43
  44     /* This runs both outside and inside the iothread lock.  */
  45     bool (*is_active)(void *opaque);
  46
  47     /* This runs outside the iothread lock in the migration case, and
  48      * within the lock in the savevm case.  The callback had better only
  49      * use data that is local to the migration thread or protected
  50      * by other locks.
  51      */
  52     int (*save_live_iterate)(QEMUFile *f, void *opaque);
  53
  54     /* This runs outside the iothread lock!  */
  55     int (*save_live_setup)(QEMUFile *f, void *opaque);
  56     uint64_t (*save_live_pending)(QEMUFile *f, void *opaque, uint64_t max_size);
  57
  58     LoadStateHandler *load_state;
  59 } SaveVMHandlers;
  60
  61 int register_savevm(DeviceState *dev,
  62                     const char *idstr,
  63                     int instance_id,
  64                     int version_id,
  65                     SaveStateHandler *save_state,
  66                     LoadStateHandler *load_state,
  67                     void *opaque);
  68
  69 int register_savevm_live(DeviceState *dev,
  70                          const char *idstr,
  71                          int instance_id,
  72                          int version_id,
  73                          SaveVMHandlers *ops,
  74                          void *opaque);
  75
  76 void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque);
  77 void register_device_unmigratable(DeviceState *dev, const char *idstr,
  78                                                                 void *opaque);
  79
  80
  81 typedef struct VMStateInfo VMStateInfo;
  82 typedef struct VMStateDescription VMStateDescription;
  83
  84 struct VMStateInfo {
  85     const char *name;
  86     int (*get)(QEMUFile *f, void *pv, size_t size);
  87     void (*put)(QEMUFile *f, void *pv, size_t size);
  88 };
  89
  90 enum VMStateFlags {
  91     VMS_SINGLE           = 0x001,
  92     VMS_POINTER          = 0x002,
  93     VMS_ARRAY            = 0x004,
  94     VMS_STRUCT           = 0x008,
  95     VMS_VARRAY_INT32     = 0x010,  /* Array with size in int32_t field*/
  96     VMS_BUFFER           = 0x020,  /* static sized buffer */
  97     VMS_ARRAY_OF_POINTER = 0x040,
  98     VMS_VARRAY_UINT16    = 0x080,  /* Array with size in uint16_t field */
  99     VMS_VBUFFER          = 0x100,  /* Buffer with size in int32_t field */
 100     VMS_MULTIPLY         = 0x200,  /* multiply "size" field by field_size */
 101     VMS_VARRAY_UINT8     = 0x400,  /* Array with size in uint8_t field*/
 102     VMS_VARRAY_UINT32    = 0x800,  /* Array with size in uint32_t field*/
 103 };
 104
 105 typedef struct {
 106     const char *name;
 107     size_t offset;
 108     size_t size;
 109     size_t start;
 110     int num;
 111     size_t num_offset;
 112     size_t size_offset;
 113     const VMStateInfo *info;
 114     enum VMStateFlags flags;
 115     const VMStateDescription *vmsd;
 116     int version_id;
 117     bool (*field_exists)(void *opaque, int version_id);
 118 } VMStateField;
 119
 120 typedef struct VMStateSubsection {
 121     const VMStateDescription *vmsd;
 122     bool (*needed)(void *opaque);
 123 } VMStateSubsection;
 124
 125 struct VMStateDescription {
 126     const char *name;
 127     int unmigratable;
 128     int version_id;
 129     int minimum_version_id;
 130     int minimum_version_id_old;
 131     LoadStateHandler *load_state_old;
 132     int (*pre_load)(void *opaque);
 133     int (*post_load)(void *opaque, int version_id);
 134     void (*pre_save)(void *opaque);
 135     VMStateField *fields;
 136     const VMStateSubsection *subsections;
 137 };
 138
 139 #ifdef CONFIG_USER_ONLY
 140 extern const VMStateDescription vmstate_dummy;
 141 #endif
 142
 143 extern const VMStateInfo vmstate_info_bool;
 144
 145 extern const VMStateInfo vmstate_info_int8;
 146 extern const VMStateInfo vmstate_info_int16;
 147 extern const VMStateInfo vmstate_info_int32;
 148 extern const VMStateInfo vmstate_info_int64;
 149
 150 extern const VMStateInfo vmstate_info_uint8_equal;
 151 extern const VMStateInfo vmstate_info_uint16_equal;
 152 extern const VMStateInfo vmstate_info_int32_equal;
 153 extern const VMStateInfo vmstate_info_uint32_equal;
 154 extern const VMStateInfo vmstate_info_uint64_equal;
 155 extern const VMStateInfo vmstate_info_int32_le;
 156
 157 extern const VMStateInfo vmstate_info_uint8;
 158 extern const VMStateInfo vmstate_info_uint16;
 159 extern const VMStateInfo vmstate_info_uint32;
 160 extern const VMStateInfo vmstate_info_uint64;
 161
 162 extern const VMStateInfo vmstate_info_float64;
 163
 164 extern const VMStateInfo vmstate_info_timer;
 165 extern const VMStateInfo vmstate_info_buffer;
 166 extern const VMStateInfo vmstate_info_unused_buffer;
 167 extern const VMStateInfo vmstate_info_bitmap;
 168
 169 #define type_check_2darray(t1,t2,n,m) ((t1(*)[n][m])0 - (t2*)0)
 170 #define type_check_array(t1,t2,n) ((t1(*)[n])0 - (t2*)0)
 171 #define type_check_pointer(t1,t2) ((t1**)0 - (t2*)0)
 172
 173 #define vmstate_offset_value(_state, _field, _type)                  \
 174     (offsetof(_state, _field) +                                      \
 175      type_check(_type, typeof_field(_state, _field)))
 176
 177 #define vmstate_offset_pointer(_state, _field, _type)                \
 178     (offsetof(_state, _field) +                                      \
 179      type_check_pointer(_type, typeof_field(_state, _field)))
 180
 181 #define vmstate_offset_array(_state, _field, _type, _num)            \
 182     (offsetof(_state, _field) +                                      \
 183      type_check_array(_type, typeof_field(_state, _field), _num))
 184
 185 #define vmstate_offset_2darray(_state, _field, _type, _n1, _n2)      \
 186     (offsetof(_state, _field) +                                      \
 187      type_check_2darray(_type, typeof_field(_state, _field), _n1, _n2))
 188
 189 #define vmstate_offset_sub_array(_state, _field, _type, _start)      \
 190     (offsetof(_state, _field[_start]))
 191
 192 #define vmstate_offset_buffer(_state, _field)                        \
 193     vmstate_offset_array(_state, _field, uint8_t,                    \
 194                          sizeof(typeof_field(_state, _field)))
 195
 196 #define VMSTATE_SINGLE_TEST(_field, _state, _test, _version, _info, _type) { \
 197     .name         = (stringify(_field)),                             \
 198     .version_id   = (_version),                                      \
 199     .field_exists = (_test),                                         \
 200     .size         = sizeof(_type),                                   \
 201     .info         = &(_info),                                        \
 202     .flags        = VMS_SINGLE,                                      \
 203     .offset       = vmstate_offset_value(_state, _field, _type),     \
 204 }
 205
 206 #define VMSTATE_POINTER(_field, _state, _version, _info, _type) {    \
 207     .name       = (stringify(_field)),                               \
 208     .version_id = (_version),                                        \
 209     .info       = &(_info),                                          \
 210     .size       = sizeof(_type),                                     \
 211     .flags      = VMS_SINGLE|VMS_POINTER,                            \
 212     .offset     = vmstate_offset_value(_state, _field, _type),       \
 213 }
 214
 215 #define VMSTATE_POINTER_TEST(_field, _state, _test, _info, _type) {  \
 216     .name       = (stringify(_field)),                               \
 217     .info       = &(_info),                                          \
 218     .field_exists = (_test),                                         \
 219     .size       = sizeof(_type),                                     \
 220     .flags      = VMS_SINGLE|VMS_POINTER,                            \
 221     .offset     = vmstate_offset_value(_state, _field, _type),       \
 222 }
 223
 224 #define VMSTATE_ARRAY(_field, _state, _num, _version, _info, _type) {\
 225     .name       = (stringify(_field)),                               \
 226     .version_id = (_version),                                        \
 227     .num        = (_num),                                            \
 228     .info       = &(_info),                                          \
 229     .size       = sizeof(_type),                                     \
 230     .flags      = VMS_ARRAY,                                         \
 231     .offset     = vmstate_offset_array(_state, _field, _type, _num), \
 232 }
 233
 234 #define VMSTATE_2DARRAY(_field, _state, _n1, _n2, _version, _info, _type) { \
 235     .name       = (stringify(_field)),                                      \
 236     .version_id = (_version),                                               \
 237     .num        = (_n1) * (_n2),                                            \
 238     .info       = &(_info),                                                 \
 239     .size       = sizeof(_type),                                            \
 240     .flags      = VMS_ARRAY,                                                \
 241     .offset     = vmstate_offset_2darray(_state, _field, _type, _n1, _n2),  \
 242 }
 243
 244 #define VMSTATE_ARRAY_TEST(_field, _state, _num, _test, _info, _type) {\
 245     .name         = (stringify(_field)),                              \
 246     .field_exists = (_test),                                          \
 247     .num          = (_num),                                           \
 248     .info         = &(_info),                                         \
 249     .size         = sizeof(_type),                                    \
 250     .flags        = VMS_ARRAY,                                        \
 251     .offset       = vmstate_offset_array(_state, _field, _type, _num),\
 252 }
 253
 254 #define VMSTATE_SUB_ARRAY(_field, _state, _start, _num, _version, _info, _type) { \
 255     .name       = (stringify(_field)),                               \
 256     .version_id = (_version),                                        \
 257     .num        = (_num),                                            \
 258     .info       = &(_info),                                          \
 259     .size       = sizeof(_type),                                     \
 260     .flags      = VMS_ARRAY,                                         \
 261     .offset     = vmstate_offset_sub_array(_state, _field, _type, _start), \
 262 }
 263
 264 #define VMSTATE_ARRAY_INT32_UNSAFE(_field, _state, _field_num, _info, _type) {\
 265     .name       = (stringify(_field)),                               \
 266     .num_offset = vmstate_offset_value(_state, _field_num, int32_t), \
 267     .info       = &(_info),                                          \
 268     .size       = sizeof(_type),                                     \
 269     .flags      = VMS_VARRAY_INT32,                                  \
 270     .offset     = offsetof(_state, _field),                          \
 271 }
 272
 273 #define VMSTATE_VARRAY_INT32(_field, _state, _field_num, _version, _info, _type) {\
 274     .name       = (stringify(_field)),                               \
 275     .version_id = (_version),                                        \
 276     .num_offset = vmstate_offset_value(_state, _field_num, int32_t), \
 277     .info       = &(_info),                                          \
 278     .size       = sizeof(_type),                                     \
 279     .flags      = VMS_VARRAY_INT32|VMS_POINTER,                      \
 280     .offset     = vmstate_offset_pointer(_state, _field, _type),     \
 281 }
 282
 283 #define VMSTATE_VARRAY_UINT32(_field, _state, _field_num, _version, _info, _type) {\
 284     .name       = (stringify(_field)),                               \
 285     .version_id = (_version),                                        \
 286     .num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\
 287     .info       = &(_info),                                          \
 288     .size       = sizeof(_type),                                     \
 289     .flags      = VMS_VARRAY_UINT32|VMS_POINTER,                     \
 290     .offset     = vmstate_offset_pointer(_state, _field, _type),     \
 291 }
 292
 293 #define VMSTATE_VARRAY_UINT16_UNSAFE(_field, _state, _field_num, _version, _info, _type) {\
 294     .name       = (stringify(_field)),                               \
 295     .version_id = (_version),                                        \
 296     .num_offset = vmstate_offset_value(_state, _field_num, uint16_t),\
 297     .info       = &(_info),                                          \
 298     .size       = sizeof(_type),                                     \
 299     .flags      = VMS_VARRAY_UINT16,                                 \
 300     .offset     = offsetof(_state, _field),                          \
 301 }
 302
 303 #define VMSTATE_STRUCT_TEST(_field, _state, _test, _version, _vmsd, _type) { \
 304     .name         = (stringify(_field)),                             \
 305     .version_id   = (_version),                                      \
 306     .field_exists = (_test),                                         \
 307     .vmsd         = &(_vmsd),                                        \
 308     .size         = sizeof(_type),                                   \
 309     .flags        = VMS_STRUCT,                                      \
 310     .offset       = vmstate_offset_value(_state, _field, _type),     \
 311 }
 312
 313 #define VMSTATE_STRUCT_POINTER_V(_field, _state, _version, _vmsd, _type) { \
 314     .name         = (stringify(_field)),                             \
 315     .version_id   = (_version),                                        \
 316     .vmsd         = &(_vmsd),                                        \
 317     .size         = sizeof(_type *),                                 \
 318     .flags        = VMS_STRUCT|VMS_POINTER,                          \
 319     .offset       = vmstate_offset_pointer(_state, _field, _type),   \
 320 }
 321
 322 #define VMSTATE_STRUCT_POINTER_TEST_V(_field, _state, _test, _version, _vmsd, _type) { \
 323     .name         = (stringify(_field)),                             \
 324     .version_id   = (_version),                                        \
 325     .field_exists = (_test),                                         \
 326     .vmsd         = &(_vmsd),                                        \
 327     .size         = sizeof(_type *),                                 \
 328     .flags        = VMS_STRUCT|VMS_POINTER,                          \
 329     .offset       = vmstate_offset_pointer(_state, _field, _type),   \
 330 }
 331
 332 #define VMSTATE_ARRAY_OF_POINTER(_field, _state, _num, _version, _info, _type) {\
 333     .name       = (stringify(_field)),                               \
 334     .version_id = (_version),                                        \
 335     .num        = (_num),                                            \
 336     .info       = &(_info),                                          \
 337     .size       = sizeof(_type),                                     \
 338     .flags      = VMS_ARRAY|VMS_ARRAY_OF_POINTER,                    \
 339     .offset     = vmstate_offset_array(_state, _field, _type, _num), \
 340 }
 341
 342 #define VMSTATE_ARRAY_OF_POINTER_TO_STRUCT(_f, _s, _n, _v, _vmsd, _type) { \
 343     .name       = (stringify(_f)),                                   \
 344     .version_id = (_v),                                              \
 345     .num        = (_n),                                              \
 346     .vmsd       = &(_vmsd),                                          \
 347     .size       = sizeof(_type *),                                    \
 348     .flags      = VMS_ARRAY|VMS_STRUCT|VMS_ARRAY_OF_POINTER,         \
 349     .offset     = vmstate_offset_array(_s, _f, _type*, _n),          \
 350 }
 351
 352 #define VMSTATE_STRUCT_ARRAY_TEST(_field, _state, _num, _test, _version, _vmsd, _type) { \
 353     .name         = (stringify(_field)),                             \
 354     .num          = (_num),                                          \
 355     .field_exists = (_test),                                         \
 356     .version_id   = (_version),                                      \
 357     .vmsd         = &(_vmsd),                                        \
 358     .size         = sizeof(_type),                                   \
 359     .flags        = VMS_STRUCT|VMS_ARRAY,                            \
 360     .offset       = vmstate_offset_array(_state, _field, _type, _num),\
 361 }
 362
 363 #define VMSTATE_STRUCT_VARRAY_UINT8(_field, _state, _field_num, _version, _vmsd, _type) { \
 364     .name       = (stringify(_field)),                               \
 365     .num_offset = vmstate_offset_value(_state, _field_num, uint8_t), \
 366     .version_id = (_version),                                        \
 367     .vmsd       = &(_vmsd),                                          \
 368     .size       = sizeof(_type),                                     \
 369     .flags      = VMS_STRUCT|VMS_VARRAY_UINT8,                       \
 370     .offset     = offsetof(_state, _field),                          \
 371 }
 372
 373 #define VMSTATE_STRUCT_VARRAY_POINTER_INT32(_field, _state, _field_num, _vmsd, _type) { \
 374     .name       = (stringify(_field)),                               \
 375     .version_id = 0,                                                 \
 376     .num_offset = vmstate_offset_value(_state, _field_num, int32_t), \
 377     .size       = sizeof(_type),                                     \
 378     .vmsd       = &(_vmsd),                                          \
 379     .flags      = VMS_POINTER | VMS_VARRAY_INT32 | VMS_STRUCT,       \
 380     .offset     = vmstate_offset_pointer(_state, _field, _type),     \
 381 }
 382
 383 #define VMSTATE_STRUCT_VARRAY_POINTER_UINT32(_field, _state, _field_num, _vmsd, _type) { \
 384     .name       = (stringify(_field)),                               \
 385     .version_id = 0,                                                 \
 386     .num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\
 387     .size       = sizeof(_type),                                     \
 388     .vmsd       = &(_vmsd),                                          \
 389     .flags      = VMS_POINTER | VMS_VARRAY_INT32 | VMS_STRUCT,       \
 390     .offset     = vmstate_offset_pointer(_state, _field, _type),     \
 391 }
 392
 393 #define VMSTATE_STRUCT_VARRAY_POINTER_UINT16(_field, _state, _field_num, _vmsd, _type) { \
 394     .name       = (stringify(_field)),                               \
 395     .version_id = 0,                                                 \
 396     .num_offset = vmstate_offset_value(_state, _field_num, uint16_t),\
 397     .size       = sizeof(_type),                                     \
 398     .vmsd       = &(_vmsd),                                          \
 399     .flags      = VMS_POINTER | VMS_VARRAY_UINT16 | VMS_STRUCT,      \
 400     .offset     = vmstate_offset_pointer(_state, _field, _type),     \
 401 }
 402
 403 #define VMSTATE_STRUCT_VARRAY_INT32(_field, _state, _field_num, _version, _vmsd, _type) { \
 404     .name       = (stringify(_field)),                               \
 405     .num_offset = vmstate_offset_value(_state, _field_num, int32_t), \
 406     .version_id = (_version),                                        \
 407     .vmsd       = &(_vmsd),                                          \
 408     .size       = sizeof(_type),                                     \
 409     .flags      = VMS_STRUCT|VMS_VARRAY_INT32,                       \
 410     .offset     = offsetof(_state, _field),                          \
 411 }
 412
 413 #define VMSTATE_STRUCT_VARRAY_UINT32(_field, _state, _field_num, _version, _vmsd, _type) { \
 414     .name       = (stringify(_field)),                               \
 415     .num_offset = vmstate_offset_value(_state, _field_num, uint32_t), \
 416     .version_id = (_version),                                        \
 417     .vmsd       = &(_vmsd),                                          \
 418     .size       = sizeof(_type),                                     \
 419     .flags      = VMS_STRUCT|VMS_VARRAY_UINT32,                      \
 420     .offset     = offsetof(_state, _field),                          \
 421 }
 422
 423 #define VMSTATE_STATIC_BUFFER(_field, _state, _version, _test, _start, _size) { \
 424     .name         = (stringify(_field)),                             \
 425     .version_id   = (_version),                                      \
 426     .field_exists = (_test),                                         \
 427     .size         = (_size - _start),                                \
 428     .info         = &vmstate_info_buffer,                            \
 429     .flags        = VMS_BUFFER,                                      \
 430     .offset       = vmstate_offset_buffer(_state, _field) + _start,  \
 431 }
 432
 433 #define VMSTATE_VBUFFER_MULTIPLY(_field, _state, _version, _test, _start, _field_size, _multiply) { \
 434     .name         = (stringify(_field)),                             \
 435     .version_id   = (_version),                                      \
 436     .field_exists = (_test),                                         \
 437     .size_offset  = vmstate_offset_value(_state, _field_size, uint32_t),\
 438     .size         = (_multiply),                                      \
 439     .info         = &vmstate_info_buffer,                            \
 440     .flags        = VMS_VBUFFER|VMS_POINTER|VMS_MULTIPLY,            \
 441     .offset       = offsetof(_state, _field),                        \
 442     .start        = (_start),                                        \
 443 }
 444
 445 #define VMSTATE_VBUFFER(_field, _state, _version, _test, _start, _field_size) { \
 446     .name         = (stringify(_field)),                             \
 447     .version_id   = (_version),                                      \
 448     .field_exists = (_test),                                         \
 449     .size_offset  = vmstate_offset_value(_state, _field_size, int32_t),\
 450     .info         = &vmstate_info_buffer,                            \
 451     .flags        = VMS_VBUFFER|VMS_POINTER,                         \
 452     .offset       = offsetof(_state, _field),                        \
 453     .start        = (_start),                                        \
 454 }
 455
 456 #define VMSTATE_VBUFFER_UINT32(_field, _state, _version, _test, _start, _field_size) { \
 457     .name         = (stringify(_field)),                             \
 458     .version_id   = (_version),                                      \
 459     .field_exists = (_test),                                         \
 460     .size_offset  = vmstate_offset_value(_state, _field_size, uint32_t),\
 461     .info         = &vmstate_info_buffer,                            \
 462     .flags        = VMS_VBUFFER|VMS_POINTER,                         \
 463     .offset       = offsetof(_state, _field),                        \
 464     .start        = (_start),                                        \
 465 }
 466
 467 #define VMSTATE_BUFFER_UNSAFE_INFO(_field, _state, _version, _info, _size) { \
 468     .name       = (stringify(_field)),                               \
 469     .version_id = (_version),                                        \
 470     .size       = (_size),                                           \
 471     .info       = &(_info),                                          \
 472     .flags      = VMS_BUFFER,                                        \
 473     .offset     = offsetof(_state, _field),                          \
 474 }
 475
 476 #define VMSTATE_BUFFER_POINTER_UNSAFE(_field, _state, _version, _size) { \
 477     .name       = (stringify(_field)),                               \
 478     .version_id = (_version),                                        \
 479     .size       = (_size),                                           \
 480     .info       = &vmstate_info_buffer,                              \
 481     .flags      = VMS_BUFFER|VMS_POINTER,                            \
 482     .offset     = offsetof(_state, _field),                          \
 483 }
 484
 485 #define VMSTATE_UNUSED_BUFFER(_test, _version, _size) {              \
 486     .name         = "unused",                                        \
 487     .field_exists = (_test),                                         \
 488     .version_id   = (_version),                                      \
 489     .size         = (_size),                                         \
 490     .info         = &vmstate_info_unused_buffer,                     \
 491     .flags        = VMS_BUFFER,                                      \
 492 }
 493
 494 /* _field_size should be a int32_t field in the _state struct giving the
 495  * size of the bitmap _field in bits.
 496  */
 497 #define VMSTATE_BITMAP(_field, _state, _version, _field_size) {      \
 498     .name         = (stringify(_field)),                             \
 499     .version_id   = (_version),                                      \
 500     .size_offset  = vmstate_offset_value(_state, _field_size, int32_t),\
 501     .info         = &vmstate_info_bitmap,                            \
 502     .flags        = VMS_VBUFFER|VMS_POINTER,                         \
 503     .offset       = offsetof(_state, _field),                        \
 504 }
 505
 506 /* _f : field name
 507    _f_n : num of elements field_name
 508    _n : num of elements
 509    _s : struct state name
 510    _v : version
 511 */
 512
 513 #define VMSTATE_SINGLE(_field, _state, _version, _info, _type)        \
 514     VMSTATE_SINGLE_TEST(_field, _state, NULL, _version, _info, _type)
 515
 516 #define VMSTATE_STRUCT(_field, _state, _version, _vmsd, _type)        \
 517     VMSTATE_STRUCT_TEST(_field, _state, NULL, _version, _vmsd, _type)
 518
 519 #define VMSTATE_STRUCT_POINTER(_field, _state, _vmsd, _type)          \
 520     VMSTATE_STRUCT_POINTER_V(_field, _state, 0, _vmsd, _type)
 521
 522 #define VMSTATE_STRUCT_POINTER_TEST(_field, _state, _test, _vmsd, _type)     \
 523     VMSTATE_STRUCT_POINTER_TEST_V(_field, _state, _test, 0, _vmsd, _type)
 524
 525 #define VMSTATE_STRUCT_ARRAY(_field, _state, _num, _version, _vmsd, _type) \
 526     VMSTATE_STRUCT_ARRAY_TEST(_field, _state, _num, NULL, _version,   \
 527             _vmsd, _type)
 528
 529 #define VMSTATE_BOOL_V(_f, _s, _v)                                    \
 530     VMSTATE_SINGLE(_f, _s, _v, vmstate_info_bool, bool)
 531
 532 #define VMSTATE_INT8_V(_f, _s, _v)                                    \
 533     VMSTATE_SINGLE(_f, _s, _v, vmstate_info_int8, int8_t)
 534 #define VMSTATE_INT16_V(_f, _s, _v)                                   \
 535     VMSTATE_SINGLE(_f, _s, _v, vmstate_info_int16, int16_t)
 536 #define VMSTATE_INT32_V(_f, _s, _v)                                   \
 537     VMSTATE_SINGLE(_f, _s, _v, vmstate_info_int32, int32_t)
 538 #define VMSTATE_INT64_V(_f, _s, _v)                                   \
 539     VMSTATE_SINGLE(_f, _s, _v, vmstate_info_int64, int64_t)
 540
 541 #define VMSTATE_UINT8_V(_f, _s, _v)                                   \
 542     VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint8, uint8_t)
 543 #define VMSTATE_UINT16_V(_f, _s, _v)                                  \
 544     VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint16, uint16_t)
 545 #define VMSTATE_UINT32_V(_f, _s, _v)                                  \
 546     VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint32, uint32_t)
 547 #define VMSTATE_UINT64_V(_f, _s, _v)                                  \
 548     VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint64, uint64_t)
 549
 550 #define VMSTATE_BOOL(_f, _s)                                          \
 551     VMSTATE_BOOL_V(_f, _s, 0)
 552
 553 #define VMSTATE_INT8(_f, _s)                                          \
 554     VMSTATE_INT8_V(_f, _s, 0)
 555 #define VMSTATE_INT16(_f, _s)                                         \
 556     VMSTATE_INT16_V(_f, _s, 0)
 557 #define VMSTATE_INT32(_f, _s)                                         \
 558     VMSTATE_INT32_V(_f, _s, 0)
 559 #define VMSTATE_INT64(_f, _s)                                         \
 560     VMSTATE_INT64_V(_f, _s, 0)
 561
 562 #define VMSTATE_UINT8(_f, _s)                                         \
 563     VMSTATE_UINT8_V(_f, _s, 0)
 564 #define VMSTATE_UINT16(_f, _s)                                        \
 565     VMSTATE_UINT16_V(_f, _s, 0)
 566 #define VMSTATE_UINT32(_f, _s)                                        \
 567     VMSTATE_UINT32_V(_f, _s, 0)
 568 #define VMSTATE_UINT64(_f, _s)                                        \
 569     VMSTATE_UINT64_V(_f, _s, 0)
 570
 571 #define VMSTATE_UINT8_EQUAL(_f, _s)                                   \
 572     VMSTATE_SINGLE(_f, _s, 0, vmstate_info_uint8_equal, uint8_t)
 573
 574 #define VMSTATE_UINT16_EQUAL(_f, _s)                                  \
 575     VMSTATE_SINGLE(_f, _s, 0, vmstate_info_uint16_equal, uint16_t)
 576
 577 #define VMSTATE_UINT16_EQUAL_V(_f, _s, _v)                            \
 578     VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint16_equal, uint16_t)
 579
 580 #define VMSTATE_INT32_EQUAL(_f, _s)                                   \
 581     VMSTATE_SINGLE(_f, _s, 0, vmstate_info_int32_equal, int32_t)
 582
 583 #define VMSTATE_UINT32_EQUAL_V(_f, _s, _v)                            \
 584     VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint32_equal, uint32_t)
 585
 586 #define VMSTATE_UINT32_EQUAL(_f, _s)                                  \
 587     VMSTATE_UINT32_EQUAL_V(_f, _s, 0)
 588
 589 #define VMSTATE_UINT64_EQUAL_V(_f, _s, _v)                            \
 590     VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint64_equal, uint64_t)
 591
 592 #define VMSTATE_UINT64_EQUAL(_f, _s)                                  \
 593     VMSTATE_UINT64_EQUAL_V(_f, _s, 0)
 594
 595 #define VMSTATE_INT32_LE(_f, _s)                                   \
 596     VMSTATE_SINGLE(_f, _s, 0, vmstate_info_int32_le, int32_t)
 597
 598 #define VMSTATE_UINT8_TEST(_f, _s, _t)                               \
 599     VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_uint8, uint8_t)
 600
 601 #define VMSTATE_UINT16_TEST(_f, _s, _t)                               \
 602     VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_uint16, uint16_t)
 603
 604 #define VMSTATE_UINT32_TEST(_f, _s, _t)                                  \
 605     VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_uint32, uint32_t)
 606
 607
 608 #define VMSTATE_FLOAT64_V(_f, _s, _v)                                 \
 609     VMSTATE_SINGLE(_f, _s, _v, vmstate_info_float64, float64)
 610
 611 #define VMSTATE_FLOAT64(_f, _s)                                       \
 612     VMSTATE_FLOAT64_V(_f, _s, 0)
 613
 614 #define VMSTATE_TIMER_TEST(_f, _s, _test)                             \
 615     VMSTATE_POINTER_TEST(_f, _s, _test, vmstate_info_timer, QEMUTimer *)
 616
 617 #define VMSTATE_TIMER_V(_f, _s, _v)                                   \
 618     VMSTATE_POINTER(_f, _s, _v, vmstate_info_timer, QEMUTimer *)
 619
 620 #define VMSTATE_TIMER(_f, _s)                                         \
 621     VMSTATE_TIMER_V(_f, _s, 0)
 622
 623 #define VMSTATE_TIMER_ARRAY(_f, _s, _n)                              \
 624     VMSTATE_ARRAY_OF_POINTER(_f, _s, _n, 0, vmstate_info_timer, QEMUTimer *)
 625
 626 #define VMSTATE_BOOL_ARRAY_V(_f, _s, _n, _v)                         \
 627     VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_bool, bool)
 628
 629 #define VMSTATE_BOOL_ARRAY(_f, _s, _n)                               \
 630     VMSTATE_BOOL_ARRAY_V(_f, _s, _n, 0)
 631
 632 #define VMSTATE_UINT16_ARRAY_V(_f, _s, _n, _v)                         \
 633     VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_uint16, uint16_t)
 634
 635 #define VMSTATE_UINT16_2DARRAY_V(_f, _s, _n1, _n2, _v)                \
 636     VMSTATE_2DARRAY(_f, _s, _n1, _n2, _v, vmstate_info_uint16, uint16_t)
 637
 638 #define VMSTATE_UINT16_ARRAY(_f, _s, _n)                               \
 639     VMSTATE_UINT16_ARRAY_V(_f, _s, _n, 0)
 640
 641 #define VMSTATE_UINT16_2DARRAY(_f, _s, _n1, _n2)                      \
 642     VMSTATE_UINT16_2DARRAY_V(_f, _s, _n1, _n2, 0)
 643
 644 #define VMSTATE_UINT8_2DARRAY_V(_f, _s, _n1, _n2, _v)                 \
 645     VMSTATE_2DARRAY(_f, _s, _n1, _n2, _v, vmstate_info_uint8, uint8_t)
 646
 647 #define VMSTATE_UINT8_ARRAY_V(_f, _s, _n, _v)                         \
 648     VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_uint8, uint8_t)
 649
 650 #define VMSTATE_UINT8_ARRAY(_f, _s, _n)                               \
 651     VMSTATE_UINT8_ARRAY_V(_f, _s, _n, 0)
 652
 653 #define VMSTATE_UINT8_2DARRAY(_f, _s, _n1, _n2)                       \
 654     VMSTATE_UINT8_2DARRAY_V(_f, _s, _n1, _n2, 0)
 655
 656 #define VMSTATE_UINT32_ARRAY_V(_f, _s, _n, _v)                        \
 657     VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_uint32, uint32_t)
 658
 659 #define VMSTATE_UINT32_ARRAY(_f, _s, _n)                              \
 660     VMSTATE_UINT32_ARRAY_V(_f, _s, _n, 0)
 661
 662 #define VMSTATE_UINT64_ARRAY_V(_f, _s, _n, _v)                        \
 663     VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_uint64, uint64_t)
 664
 665 #define VMSTATE_UINT64_ARRAY(_f, _s, _n)                              \
 666     VMSTATE_UINT64_ARRAY_V(_f, _s, _n, 0)
 667
 668 #define VMSTATE_INT16_ARRAY_V(_f, _s, _n, _v)                         \
 669     VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_int16, int16_t)
 670
 671 #define VMSTATE_INT16_ARRAY(_f, _s, _n)                               \
 672     VMSTATE_INT16_ARRAY_V(_f, _s, _n, 0)
 673
 674 #define VMSTATE_INT32_ARRAY_V(_f, _s, _n, _v)                         \
 675     VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_int32, int32_t)
 676
 677 #define VMSTATE_INT32_ARRAY(_f, _s, _n)                               \
 678     VMSTATE_INT32_ARRAY_V(_f, _s, _n, 0)
 679
 680 #define VMSTATE_UINT32_SUB_ARRAY(_f, _s, _start, _num)                \
 681     VMSTATE_SUB_ARRAY(_f, _s, _start, _num, 0, vmstate_info_uint32, uint32_t)
 682
 683 #define VMSTATE_UINT32_ARRAY(_f, _s, _n)                              \
 684     VMSTATE_UINT32_ARRAY_V(_f, _s, _n, 0)
 685
 686 #define VMSTATE_INT64_ARRAY_V(_f, _s, _n, _v)                         \
 687     VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_int64, int64_t)
 688
 689 #define VMSTATE_INT64_ARRAY(_f, _s, _n)                               \
 690     VMSTATE_INT64_ARRAY_V(_f, _s, _n, 0)
 691
 692 #define VMSTATE_FLOAT64_ARRAY_V(_f, _s, _n, _v)                       \
 693     VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_float64, float64)
 694
 695 #define VMSTATE_FLOAT64_ARRAY(_f, _s, _n)                             \
 696     VMSTATE_FLOAT64_ARRAY_V(_f, _s, _n, 0)
 697
 698 #define VMSTATE_BUFFER_V(_f, _s, _v)                                  \
 699     VMSTATE_STATIC_BUFFER(_f, _s, _v, NULL, 0, sizeof(typeof_field(_s, _f)))
 700
 701 #define VMSTATE_BUFFER(_f, _s)                                        \
 702     VMSTATE_BUFFER_V(_f, _s, 0)
 703
 704 #define VMSTATE_PARTIAL_BUFFER(_f, _s, _size)                         \
 705     VMSTATE_STATIC_BUFFER(_f, _s, 0, NULL, 0, _size)
 706
 707 #define VMSTATE_BUFFER_START_MIDDLE(_f, _s, _start) \
 708     VMSTATE_STATIC_BUFFER(_f, _s, 0, NULL, _start, sizeof(typeof_field(_s, _f)))
 709
 710 #define VMSTATE_PARTIAL_VBUFFER(_f, _s, _size)                        \
 711     VMSTATE_VBUFFER(_f, _s, 0, NULL, 0, _size)
 712
 713 #define VMSTATE_PARTIAL_VBUFFER_UINT32(_f, _s, _size)                        \
 714     VMSTATE_VBUFFER_UINT32(_f, _s, 0, NULL, 0, _size)
 715
 716 #define VMSTATE_SUB_VBUFFER(_f, _s, _start, _size)                    \
 717     VMSTATE_VBUFFER(_f, _s, 0, NULL, _start, _size)
 718
 719 #define VMSTATE_BUFFER_TEST(_f, _s, _test)                            \
 720     VMSTATE_STATIC_BUFFER(_f, _s, 0, _test, 0, sizeof(typeof_field(_s, _f)))
 721
 722 #define VMSTATE_BUFFER_UNSAFE(_field, _state, _version, _size)        \
 723     VMSTATE_BUFFER_UNSAFE_INFO(_field, _state, _version, vmstate_info_buffer, _size)
 724
 725 #define VMSTATE_UNUSED_V(_v, _size)                                   \
 726     VMSTATE_UNUSED_BUFFER(NULL, _v, _size)
 727
 728 #define VMSTATE_UNUSED(_size)                                         \
 729     VMSTATE_UNUSED_V(0, _size)
 730
 731 #define VMSTATE_UNUSED_TEST(_test, _size)                             \
 732     VMSTATE_UNUSED_BUFFER(_test, 0, _size)
 733
 734 #define VMSTATE_END_OF_LIST()                                         \
 735     {}
 736
 737 int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
 738                        void *opaque, int version_id);
 739 void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd,
 740                         void *opaque);
 741
 742 int vmstate_register_with_alias_id(DeviceState *dev, int instance_id,
 743                                    const VMStateDescription *vmsd,
 744                                    void *base, int alias_id,
 745                                    int required_for_version);
 746
 747 static inline int vmstate_register(DeviceState *dev, int instance_id,
 748                                    const VMStateDescription *vmsd,
 749                                    void *opaque)
 750 {
 751     return vmstate_register_with_alias_id(dev, instance_id, vmsd,
 752                                           opaque, -1, 0);
 753 }
 754
 755 void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd,
 756                         void *opaque);
 757
 758 struct MemoryRegion;
 759 void vmstate_register_ram(struct MemoryRegion *memory, DeviceState *dev);
 760 void vmstate_unregister_ram(struct MemoryRegion *memory, DeviceState *dev);
 761 void vmstate_register_ram_global(struct MemoryRegion *memory);
 762
 763 #endif