hw/core/qdev-properties.c

   1 #include "qemu/osdep.h"
   2 #include "net/net.h"
   3 #include "hw/qdev.h"
   4 #include "qapi/error.h"
   5 #include "hw/pci/pci.h"
   6 #include "qapi/qmp/qerror.h"
   7 #include "qemu/error-report.h"
   8 #include "sysemu/block-backend.h"
   9 #include "hw/block/block.h"
  10 #include "net/hub.h"
  11 #include "qapi/visitor.h"
  12 #include "chardev/char.h"
  13
  14 void qdev_prop_set_after_realize(DeviceState *dev, const char *name,
  15                                   Error **errp)
  16 {
  17     if (dev->id) {
  18         error_setg(errp, "Attempt to set property '%s' on device '%s' "
  19                    "(type '%s') after it was realized", name, dev->id,
  20                    object_get_typename(OBJECT(dev)));
  21     } else {
  22         error_setg(errp, "Attempt to set property '%s' on anonymous device "
  23                    "(type '%s') after it was realized", name,
  24                    object_get_typename(OBJECT(dev)));
  25     }
  26 }
  27
  28 void qdev_prop_allow_set_link_before_realize(const Object *obj,
  29                                              const char *name,
  30                                              Object *val, Error **errp)
  31 {
  32     DeviceState *dev = DEVICE(obj);
  33
  34     if (dev->realized) {
  35         error_setg(errp, "Attempt to set link property '%s' on device '%s' "
  36                    "(type '%s') after it was realized",
  37                    name, dev->id, object_get_typename(obj));
  38     }
  39 }
  40
  41 void *qdev_get_prop_ptr(DeviceState *dev, Property *prop)
  42 {
  43     void *ptr = dev;
  44     ptr += prop->offset;
  45     return ptr;
  46 }
  47
  48 static void get_enum(Object *obj, Visitor *v, const char *name, void *opaque,
  49                      Error **errp)
  50 {
  51     DeviceState *dev = DEVICE(obj);
  52     Property *prop = opaque;
  53     int *ptr = qdev_get_prop_ptr(dev, prop);
  54
  55     visit_type_enum(v, prop->name, ptr, prop->info->enum_table, errp);
  56 }
  57
  58 static void set_enum(Object *obj, Visitor *v, const char *name, void *opaque,
  59                      Error **errp)
  60 {
  61     DeviceState *dev = DEVICE(obj);
  62     Property *prop = opaque;
  63     int *ptr = qdev_get_prop_ptr(dev, prop);
  64
  65     if (dev->realized) {
  66         qdev_prop_set_after_realize(dev, name, errp);
  67         return;
  68     }
  69
  70     visit_type_enum(v, prop->name, ptr, prop->info->enum_table, errp);
  71 }
  72
  73 static void set_default_value_enum(Object *obj, const Property *prop)
  74 {
  75     object_property_set_str(obj,
  76                             qapi_enum_lookup(prop->info->enum_table,
  77                                              prop->defval.i),
  78                             prop->name, &error_abort);
  79 }
  80
  81 /* Bit */
  82
  83 static uint32_t qdev_get_prop_mask(Property *prop)
  84 {
  85     assert(prop->info == &qdev_prop_bit);
  86     return 0x1 << prop->bitnr;
  87 }
  88
  89 static void bit_prop_set(DeviceState *dev, Property *props, bool val)
  90 {
  91     uint32_t *p = qdev_get_prop_ptr(dev, props);
  92     uint32_t mask = qdev_get_prop_mask(props);
  93     if (val) {
  94         *p |= mask;
  95     } else {
  96         *p &= ~mask;
  97     }
  98 }
  99
 100 static void prop_get_bit(Object *obj, Visitor *v, const char *name,
 101                          void *opaque, Error **errp)
 102 {
 103     DeviceState *dev = DEVICE(obj);
 104     Property *prop = opaque;
 105     uint32_t *p = qdev_get_prop_ptr(dev, prop);
 106     bool value = (*p & qdev_get_prop_mask(prop)) != 0;
 107
 108     visit_type_bool(v, name, &value, errp);
 109 }
 110
 111 static void prop_set_bit(Object *obj, Visitor *v, const char *name,
 112                          void *opaque, Error **errp)
 113 {
 114     DeviceState *dev = DEVICE(obj);
 115     Property *prop = opaque;
 116     Error *local_err = NULL;
 117     bool value;
 118
 119     if (dev->realized) {
 120         qdev_prop_set_after_realize(dev, name, errp);
 121         return;
 122     }
 123
 124     visit_type_bool(v, name, &value, &local_err);
 125     if (local_err) {
 126         error_propagate(errp, local_err);
 127         return;
 128     }
 129     bit_prop_set(dev, prop, value);
 130 }
 131
 132 static void set_default_value_bool(Object *obj, const Property *prop)
 133 {
 134     object_property_set_bool(obj, prop->defval.u, prop->name, &error_abort);
 135 }
 136
 137 const PropertyInfo qdev_prop_bit = {
 138     .name  = "bool",
 139     .description = "on/off",
 140     .get   = prop_get_bit,
 141     .set   = prop_set_bit,
 142     .set_default_value = set_default_value_bool,
 143 };
 144
 145 /* Bit64 */
 146
 147 static uint64_t qdev_get_prop_mask64(Property *prop)
 148 {
 149     assert(prop->info == &qdev_prop_bit64);
 150     return 0x1ull << prop->bitnr;
 151 }
 152
 153 static void bit64_prop_set(DeviceState *dev, Property *props, bool val)
 154 {
 155     uint64_t *p = qdev_get_prop_ptr(dev, props);
 156     uint64_t mask = qdev_get_prop_mask64(props);
 157     if (val) {
 158         *p |= mask;
 159     } else {
 160         *p &= ~mask;
 161     }
 162 }
 163
 164 static void prop_get_bit64(Object *obj, Visitor *v, const char *name,
 165                            void *opaque, Error **errp)
 166 {
 167     DeviceState *dev = DEVICE(obj);
 168     Property *prop = opaque;
 169     uint64_t *p = qdev_get_prop_ptr(dev, prop);
 170     bool value = (*p & qdev_get_prop_mask64(prop)) != 0;
 171
 172     visit_type_bool(v, name, &value, errp);
 173 }
 174
 175 static void prop_set_bit64(Object *obj, Visitor *v, const char *name,
 176                            void *opaque, Error **errp)
 177 {
 178     DeviceState *dev = DEVICE(obj);
 179     Property *prop = opaque;
 180     Error *local_err = NULL;
 181     bool value;
 182
 183     if (dev->realized) {
 184         qdev_prop_set_after_realize(dev, name, errp);
 185         return;
 186     }
 187
 188     visit_type_bool(v, name, &value, &local_err);
 189     if (local_err) {
 190         error_propagate(errp, local_err);
 191         return;
 192     }
 193     bit64_prop_set(dev, prop, value);
 194 }
 195
 196 const PropertyInfo qdev_prop_bit64 = {
 197     .name  = "bool",
 198     .description = "on/off",
 199     .get   = prop_get_bit64,
 200     .set   = prop_set_bit64,
 201     .set_default_value = set_default_value_bool,
 202 };
 203
 204 /* --- bool --- */
 205
 206 static void get_bool(Object *obj, Visitor *v, const char *name, void *opaque,
 207                      Error **errp)
 208 {
 209     DeviceState *dev = DEVICE(obj);
 210     Property *prop = opaque;
 211     bool *ptr = qdev_get_prop_ptr(dev, prop);
 212
 213     visit_type_bool(v, name, ptr, errp);
 214 }
 215
 216 static void set_bool(Object *obj, Visitor *v, const char *name, void *opaque,
 217                      Error **errp)
 218 {
 219     DeviceState *dev = DEVICE(obj);
 220     Property *prop = opaque;
 221     bool *ptr = qdev_get_prop_ptr(dev, prop);
 222
 223     if (dev->realized) {
 224         qdev_prop_set_after_realize(dev, name, errp);
 225         return;
 226     }
 227
 228     visit_type_bool(v, name, ptr, errp);
 229 }
 230
 231 const PropertyInfo qdev_prop_bool = {
 232     .name  = "bool",
 233     .get   = get_bool,
 234     .set   = set_bool,
 235     .set_default_value = set_default_value_bool,
 236 };
 237
 238 /* --- 8bit integer --- */
 239
 240 static void get_uint8(Object *obj, Visitor *v, const char *name, void *opaque,
 241                       Error **errp)
 242 {
 243     DeviceState *dev = DEVICE(obj);
 244     Property *prop = opaque;
 245     uint8_t *ptr = qdev_get_prop_ptr(dev, prop);
 246
 247     visit_type_uint8(v, name, ptr, errp);
 248 }
 249
 250 static void set_uint8(Object *obj, Visitor *v, const char *name, void *opaque,
 251                       Error **errp)
 252 {
 253     DeviceState *dev = DEVICE(obj);
 254     Property *prop = opaque;
 255     uint8_t *ptr = qdev_get_prop_ptr(dev, prop);
 256
 257     if (dev->realized) {
 258         qdev_prop_set_after_realize(dev, name, errp);
 259         return;
 260     }
 261
 262     visit_type_uint8(v, name, ptr, errp);
 263 }
 264
 265 static void set_default_value_int(Object *obj, const Property *prop)
 266 {
 267     object_property_set_int(obj, prop->defval.i, prop->name, &error_abort);
 268 }
 269
 270 static void set_default_value_uint(Object *obj, const Property *prop)
 271 {
 272     object_property_set_uint(obj, prop->defval.u, prop->name, &error_abort);
 273 }
 274
 275 const PropertyInfo qdev_prop_uint8 = {
 276     .name  = "uint8",
 277     .get   = get_uint8,
 278     .set   = set_uint8,
 279     .set_default_value = set_default_value_uint,
 280 };
 281
 282 /* --- 16bit integer --- */
 283
 284 static void get_uint16(Object *obj, Visitor *v, const char *name,
 285                        void *opaque, Error **errp)
 286 {
 287     DeviceState *dev = DEVICE(obj);
 288     Property *prop = opaque;
 289     uint16_t *ptr = qdev_get_prop_ptr(dev, prop);
 290
 291     visit_type_uint16(v, name, ptr, errp);
 292 }
 293
 294 static void set_uint16(Object *obj, Visitor *v, const char *name,
 295                        void *opaque, Error **errp)
 296 {
 297     DeviceState *dev = DEVICE(obj);
 298     Property *prop = opaque;
 299     uint16_t *ptr = qdev_get_prop_ptr(dev, prop);
 300
 301     if (dev->realized) {
 302         qdev_prop_set_after_realize(dev, name, errp);
 303         return;
 304     }
 305
 306     visit_type_uint16(v, name, ptr, errp);
 307 }
 308
 309 const PropertyInfo qdev_prop_uint16 = {
 310     .name  = "uint16",
 311     .get   = get_uint16,
 312     .set   = set_uint16,
 313     .set_default_value = set_default_value_uint,
 314 };
 315
 316 /* --- 32bit integer --- */
 317
 318 static void get_uint32(Object *obj, Visitor *v, const char *name,
 319                        void *opaque, Error **errp)
 320 {
 321     DeviceState *dev = DEVICE(obj);
 322     Property *prop = opaque;
 323     uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
 324
 325     visit_type_uint32(v, name, ptr, errp);
 326 }
 327
 328 static void set_uint32(Object *obj, Visitor *v, const char *name,
 329                        void *opaque, Error **errp)
 330 {
 331     DeviceState *dev = DEVICE(obj);
 332     Property *prop = opaque;
 333     uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
 334
 335     if (dev->realized) {
 336         qdev_prop_set_after_realize(dev, name, errp);
 337         return;
 338     }
 339
 340     visit_type_uint32(v, name, ptr, errp);
 341 }
 342
 343 static void get_int32(Object *obj, Visitor *v, const char *name, void *opaque,
 344                       Error **errp)
 345 {
 346     DeviceState *dev = DEVICE(obj);
 347     Property *prop = opaque;
 348     int32_t *ptr = qdev_get_prop_ptr(dev, prop);
 349
 350     visit_type_int32(v, name, ptr, errp);
 351 }
 352
 353 static void set_int32(Object *obj, Visitor *v, const char *name, void *opaque,
 354                       Error **errp)
 355 {
 356     DeviceState *dev = DEVICE(obj);
 357     Property *prop = opaque;
 358     int32_t *ptr = qdev_get_prop_ptr(dev, prop);
 359
 360     if (dev->realized) {
 361         qdev_prop_set_after_realize(dev, name, errp);
 362         return;
 363     }
 364
 365     visit_type_int32(v, name, ptr, errp);
 366 }
 367
 368 const PropertyInfo qdev_prop_uint32 = {
 369     .name  = "uint32",
 370     .get   = get_uint32,
 371     .set   = set_uint32,
 372     .set_default_value = set_default_value_uint,
 373 };
 374
 375 const PropertyInfo qdev_prop_int32 = {
 376     .name  = "int32",
 377     .get   = get_int32,
 378     .set   = set_int32,
 379     .set_default_value = set_default_value_int,
 380 };
 381
 382 /* --- 64bit integer --- */
 383
 384 static void get_uint64(Object *obj, Visitor *v, const char *name,
 385                        void *opaque, Error **errp)
 386 {
 387     DeviceState *dev = DEVICE(obj);
 388     Property *prop = opaque;
 389     uint64_t *ptr = qdev_get_prop_ptr(dev, prop);
 390
 391     visit_type_uint64(v, name, ptr, errp);
 392 }
 393
 394 static void set_uint64(Object *obj, Visitor *v, const char *name,
 395                        void *opaque, Error **errp)
 396 {
 397     DeviceState *dev = DEVICE(obj);
 398     Property *prop = opaque;
 399     uint64_t *ptr = qdev_get_prop_ptr(dev, prop);
 400
 401     if (dev->realized) {
 402         qdev_prop_set_after_realize(dev, name, errp);
 403         return;
 404     }
 405
 406     visit_type_uint64(v, name, ptr, errp);
 407 }
 408
 409 static void get_int64(Object *obj, Visitor *v, const char *name,
 410                       void *opaque, Error **errp)
 411 {
 412     DeviceState *dev = DEVICE(obj);
 413     Property *prop = opaque;
 414     int64_t *ptr = qdev_get_prop_ptr(dev, prop);
 415
 416     visit_type_int64(v, name, ptr, errp);
 417 }
 418
 419 static void set_int64(Object *obj, Visitor *v, const char *name,
 420                       void *opaque, Error **errp)
 421 {
 422     DeviceState *dev = DEVICE(obj);
 423     Property *prop = opaque;
 424     int64_t *ptr = qdev_get_prop_ptr(dev, prop);
 425
 426     if (dev->realized) {
 427         qdev_prop_set_after_realize(dev, name, errp);
 428         return;
 429     }
 430
 431     visit_type_int64(v, name, ptr, errp);
 432 }
 433
 434 const PropertyInfo qdev_prop_uint64 = {
 435     .name  = "uint64",
 436     .get   = get_uint64,
 437     .set   = set_uint64,
 438     .set_default_value = set_default_value_uint,
 439 };
 440
 441 const PropertyInfo qdev_prop_int64 = {
 442     .name  = "int64",
 443     .get   = get_int64,
 444     .set   = set_int64,
 445     .set_default_value = set_default_value_int,
 446 };
 447
 448 /* --- string --- */
 449
 450 static void release_string(Object *obj, const char *name, void *opaque)
 451 {
 452     Property *prop = opaque;
 453     g_free(*(char **)qdev_get_prop_ptr(DEVICE(obj), prop));
 454 }
 455
 456 static void get_string(Object *obj, Visitor *v, const char *name,
 457                        void *opaque, Error **errp)
 458 {
 459     DeviceState *dev = DEVICE(obj);
 460     Property *prop = opaque;
 461     char **ptr = qdev_get_prop_ptr(dev, prop);
 462
 463     if (!*ptr) {
 464         char *str = (char *)"";
 465         visit_type_str(v, name, &str, errp);
 466     } else {
 467         visit_type_str(v, name, ptr, errp);
 468     }
 469 }
 470
 471 static void set_string(Object *obj, Visitor *v, const char *name,
 472                        void *opaque, Error **errp)
 473 {
 474     DeviceState *dev = DEVICE(obj);
 475     Property *prop = opaque;
 476     char **ptr = qdev_get_prop_ptr(dev, prop);
 477     Error *local_err = NULL;
 478     char *str;
 479
 480     if (dev->realized) {
 481         qdev_prop_set_after_realize(dev, name, errp);
 482         return;
 483     }
 484
 485     visit_type_str(v, name, &str, &local_err);
 486     if (local_err) {
 487         error_propagate(errp, local_err);
 488         return;
 489     }
 490     g_free(*ptr);
 491     *ptr = str;
 492 }
 493
 494 const PropertyInfo qdev_prop_string = {
 495     .name  = "str",
 496     .release = release_string,
 497     .get   = get_string,
 498     .set   = set_string,
 499 };
 500
 501 /* --- pointer --- */
 502
 503 /* Not a proper property, just for dirty hacks.  TODO Remove it!  */
 504 const PropertyInfo qdev_prop_ptr = {
 505     .name  = "ptr",
 506 };
 507
 508 /* --- mac address --- */
 509
 510 /*
 511  * accepted syntax versions:
 512  *   01:02:03:04:05:06
 513  *   01-02-03-04-05-06
 514  */
 515 static void get_mac(Object *obj, Visitor *v, const char *name, void *opaque,
 516                     Error **errp)
 517 {
 518     DeviceState *dev = DEVICE(obj);
 519     Property *prop = opaque;
 520     MACAddr *mac = qdev_get_prop_ptr(dev, prop);
 521     char buffer[2 * 6 + 5 + 1];
 522     char *p = buffer;
 523
 524     snprintf(buffer, sizeof(buffer), "%02x:%02x:%02x:%02x:%02x:%02x",
 525              mac->a[0], mac->a[1], mac->a[2],
 526              mac->a[3], mac->a[4], mac->a[5]);
 527
 528     visit_type_str(v, name, &p, errp);
 529 }
 530
 531 static void set_mac(Object *obj, Visitor *v, const char *name, void *opaque,
 532                     Error **errp)
 533 {
 534     DeviceState *dev = DEVICE(obj);
 535     Property *prop = opaque;
 536     MACAddr *mac = qdev_get_prop_ptr(dev, prop);
 537     Error *local_err = NULL;
 538     int i, pos;
 539     char *str, *p;
 540
 541     if (dev->realized) {
 542         qdev_prop_set_after_realize(dev, name, errp);
 543         return;
 544     }
 545
 546     visit_type_str(v, name, &str, &local_err);
 547     if (local_err) {
 548         error_propagate(errp, local_err);
 549         return;
 550     }
 551
 552     for (i = 0, pos = 0; i < 6; i++, pos += 3) {
 553         if (!qemu_isxdigit(str[pos])) {
 554             goto inval;
 555         }
 556         if (!qemu_isxdigit(str[pos+1])) {
 557             goto inval;
 558         }
 559         if (i == 5) {
 560             if (str[pos+2] != '\0') {
 561                 goto inval;
 562             }
 563         } else {
 564             if (str[pos+2] != ':' && str[pos+2] != '-') {
 565                 goto inval;
 566             }
 567         }
 568         mac->a[i] = strtol(str+pos, &p, 16);
 569     }
 570     g_free(str);
 571     return;
 572
 573 inval:
 574     error_set_from_qdev_prop_error(errp, EINVAL, dev, prop, str);
 575     g_free(str);
 576 }
 577
 578 const PropertyInfo qdev_prop_macaddr = {
 579     .name  = "str",
 580     .description = "Ethernet 6-byte MAC Address, example: 52:54:00:12:34:56",
 581     .get   = get_mac,
 582     .set   = set_mac,
 583 };
 584
 585 /* --- on/off/auto --- */
 586
 587 const PropertyInfo qdev_prop_on_off_auto = {
 588     .name = "OnOffAuto",
 589     .description = "on/off/auto",
 590     .enum_table = &OnOffAuto_lookup,
 591     .get = get_enum,
 592     .set = set_enum,
 593     .set_default_value = set_default_value_enum,
 594 };
 595
 596 /* --- lost tick policy --- */
 597
 598 QEMU_BUILD_BUG_ON(sizeof(LostTickPolicy) != sizeof(int));
 599
 600 const PropertyInfo qdev_prop_losttickpolicy = {
 601     .name  = "LostTickPolicy",
 602     .enum_table  = &LostTickPolicy_lookup,
 603     .get   = get_enum,
 604     .set   = set_enum,
 605     .set_default_value = set_default_value_enum,
 606 };
 607
 608 /* --- Block device error handling policy --- */
 609
 610 QEMU_BUILD_BUG_ON(sizeof(BlockdevOnError) != sizeof(int));
 611
 612 const PropertyInfo qdev_prop_blockdev_on_error = {
 613     .name = "BlockdevOnError",
 614     .description = "Error handling policy, "
 615                    "report/ignore/enospc/stop/auto",
 616     .enum_table = &BlockdevOnError_lookup,
 617     .get = get_enum,
 618     .set = set_enum,
 619     .set_default_value = set_default_value_enum,
 620 };
 621
 622 /* --- BIOS CHS translation */
 623
 624 QEMU_BUILD_BUG_ON(sizeof(BiosAtaTranslation) != sizeof(int));
 625
 626 const PropertyInfo qdev_prop_bios_chs_trans = {
 627     .name = "BiosAtaTranslation",
 628     .description = "Logical CHS translation algorithm, "
 629                    "auto/none/lba/large/rechs",
 630     .enum_table = &BiosAtaTranslation_lookup,
 631     .get = get_enum,
 632     .set = set_enum,
 633     .set_default_value = set_default_value_enum,
 634 };
 635
 636 /* --- FDC default drive types */
 637
 638 const PropertyInfo qdev_prop_fdc_drive_type = {
 639     .name = "FdcDriveType",
 640     .description = "FDC drive type, "
 641                    "144/288/120/none/auto",
 642     .enum_table = &FloppyDriveType_lookup,
 643     .get = get_enum,
 644     .set = set_enum,
 645     .set_default_value = set_default_value_enum,
 646 };
 647
 648 /* --- pci address --- */
 649
 650 /*
 651  * bus-local address, i.e. "$slot" or "$slot.$fn"
 652  */
 653 static void set_pci_devfn(Object *obj, Visitor *v, const char *name,
 654                           void *opaque, Error **errp)
 655 {
 656     DeviceState *dev = DEVICE(obj);
 657     Property *prop = opaque;
 658     int32_t value, *ptr = qdev_get_prop_ptr(dev, prop);
 659     unsigned int slot, fn, n;
 660     Error *local_err = NULL;
 661     char *str;
 662
 663     if (dev->realized) {
 664         qdev_prop_set_after_realize(dev, name, errp);
 665         return;
 666     }
 667
 668     visit_type_str(v, name, &str, &local_err);
 669     if (local_err) {
 670         error_free(local_err);
 671         local_err = NULL;
 672         visit_type_int32(v, name, &value, &local_err);
 673         if (local_err) {
 674             error_propagate(errp, local_err);
 675         } else if (value < -1 || value > 255) {
 676             error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
 677                        name ? name : "null", "pci_devfn");
 678         } else {
 679             *ptr = value;
 680         }
 681         return;
 682     }
 683
 684     if (sscanf(str, "%x.%x%n", &slot, &fn, &n) != 2) {
 685         fn = 0;
 686         if (sscanf(str, "%x%n", &slot, &n) != 1) {
 687             goto invalid;
 688         }
 689     }
 690     if (str[n] != '\0' || fn > 7 || slot > 31) {
 691         goto invalid;
 692     }
 693     *ptr = slot << 3 | fn;
 694     g_free(str);
 695     return;
 696
 697 invalid:
 698     error_set_from_qdev_prop_error(errp, EINVAL, dev, prop, str);
 699     g_free(str);
 700 }
 701
 702 static int print_pci_devfn(DeviceState *dev, Property *prop, char *dest,
 703                            size_t len)
 704 {
 705     int32_t *ptr = qdev_get_prop_ptr(dev, prop);
 706
 707     if (*ptr == -1) {
 708         return snprintf(dest, len, "<unset>");
 709     } else {
 710         return snprintf(dest, len, "%02x.%x", *ptr >> 3, *ptr & 7);
 711     }
 712 }
 713
 714 const PropertyInfo qdev_prop_pci_devfn = {
 715     .name  = "int32",
 716     .description = "Slot and optional function number, example: 06.0 or 06",
 717     .print = print_pci_devfn,
 718     .get   = get_int32,
 719     .set   = set_pci_devfn,
 720     .set_default_value = set_default_value_int,
 721 };
 722
 723 /* --- blocksize --- */
 724
 725 static void set_blocksize(Object *obj, Visitor *v, const char *name,
 726                           void *opaque, Error **errp)
 727 {
 728     DeviceState *dev = DEVICE(obj);
 729     Property *prop = opaque;
 730     uint16_t value, *ptr = qdev_get_prop_ptr(dev, prop);
 731     Error *local_err = NULL;
 732     const int64_t min = 512;
 733     const int64_t max = 32768;
 734
 735     if (dev->realized) {
 736         qdev_prop_set_after_realize(dev, name, errp);
 737         return;
 738     }
 739
 740     visit_type_uint16(v, name, &value, &local_err);
 741     if (local_err) {
 742         error_propagate(errp, local_err);
 743         return;
 744     }
 745     /* value of 0 means "unset" */
 746     if (value && (value < min || value > max)) {
 747         error_setg(errp, QERR_PROPERTY_VALUE_OUT_OF_RANGE,
 748                    dev->id ? : "", name, (int64_t)value, min, max);
 749         return;
 750     }
 751
 752     /* We rely on power-of-2 blocksizes for bitmasks */
 753     if ((value & (value - 1)) != 0) {
 754         error_setg(errp,
 755                   "Property %s.%s doesn't take value '%" PRId64 "', it's not a power of 2",
 756                   dev->id ?: "", name, (int64_t)value);
 757         return;
 758     }
 759
 760     *ptr = value;
 761 }
 762
 763 const PropertyInfo qdev_prop_blocksize = {
 764     .name  = "uint16",
 765     .description = "A power of two between 512 and 32768",
 766     .get   = get_uint16,
 767     .set   = set_blocksize,
 768     .set_default_value = set_default_value_uint,
 769 };
 770
 771 /* --- pci host address --- */
 772
 773 static void get_pci_host_devaddr(Object *obj, Visitor *v, const char *name,
 774                                  void *opaque, Error **errp)
 775 {
 776     DeviceState *dev = DEVICE(obj);
 777     Property *prop = opaque;
 778     PCIHostDeviceAddress *addr = qdev_get_prop_ptr(dev, prop);
 779     char buffer[] = "ffff:ff:ff.f";
 780     char *p = buffer;
 781     int rc = 0;
 782
 783     /*
 784      * Catch "invalid" device reference from vfio-pci and allow the
 785      * default buffer representing the non-existent device to be used.
 786      */
 787     if (~addr->domain || ~addr->bus || ~addr->slot || ~addr->function) {
 788         rc = snprintf(buffer, sizeof(buffer), "%04x:%02x:%02x.%0d",
 789                       addr->domain, addr->bus, addr->slot, addr->function);
 790         assert(rc == sizeof(buffer) - 1);
 791     }
 792
 793     visit_type_str(v, name, &p, errp);
 794 }
 795
 796 /*
 797  * Parse [<domain>:]<bus>:<slot>.<func>
 798  *   if <domain> is not supplied, it's assumed to be 0.
 799  */
 800 static void set_pci_host_devaddr(Object *obj, Visitor *v, const char *name,
 801                                  void *opaque, Error **errp)
 802 {
 803     DeviceState *dev = DEVICE(obj);
 804     Property *prop = opaque;
 805     PCIHostDeviceAddress *addr = qdev_get_prop_ptr(dev, prop);
 806     Error *local_err = NULL;
 807     char *str, *p;
 808     char *e;
 809     unsigned long val;
 810     unsigned long dom = 0, bus = 0;
 811     unsigned int slot = 0, func = 0;
 812
 813     if (dev->realized) {
 814         qdev_prop_set_after_realize(dev, name, errp);
 815         return;
 816     }
 817
 818     visit_type_str(v, name, &str, &local_err);
 819     if (local_err) {
 820         error_propagate(errp, local_err);
 821         return;
 822     }
 823
 824     p = str;
 825     val = strtoul(p, &e, 16);
 826     if (e == p || *e != ':') {
 827         goto inval;
 828     }
 829     bus = val;
 830
 831     p = e + 1;
 832     val = strtoul(p, &e, 16);
 833     if (e == p) {
 834         goto inval;
 835     }
 836     if (*e == ':') {
 837         dom = bus;
 838         bus = val;
 839         p = e + 1;
 840         val = strtoul(p, &e, 16);
 841         if (e == p) {
 842             goto inval;
 843         }
 844     }
 845     slot = val;
 846
 847     if (*e != '.') {
 848         goto inval;
 849     }
 850     p = e + 1;
 851     val = strtoul(p, &e, 10);
 852     if (e == p) {
 853         goto inval;
 854     }
 855     func = val;
 856
 857     if (dom > 0xffff || bus > 0xff || slot > 0x1f || func > 7) {
 858         goto inval;
 859     }
 860
 861     if (*e) {
 862         goto inval;
 863     }
 864
 865     addr->domain = dom;
 866     addr->bus = bus;
 867     addr->slot = slot;
 868     addr->function = func;
 869
 870     g_free(str);
 871     return;
 872
 873 inval:
 874     error_set_from_qdev_prop_error(errp, EINVAL, dev, prop, str);
 875     g_free(str);
 876 }
 877
 878 const PropertyInfo qdev_prop_pci_host_devaddr = {
 879     .name = "str",
 880     .description = "Address (bus/device/function) of "
 881                    "the host device, example: 04:10.0",
 882     .get = get_pci_host_devaddr,
 883     .set = set_pci_host_devaddr,
 884 };
 885
 886 /* --- support for array properties --- */
 887
 888 /* Used as an opaque for the object properties we add for each
 889  * array element. Note that the struct Property must be first
 890  * in the struct so that a pointer to this works as the opaque
 891  * for the underlying element's property hooks as well as for
 892  * our own release callback.
 893  */
 894 typedef struct {
 895     struct Property prop;
 896     char *propname;
 897     ObjectPropertyRelease *release;
 898 } ArrayElementProperty;
 899
 900 /* object property release callback for array element properties:
 901  * we call the underlying element's property release hook, and
 902  * then free the memory we allocated when we added the property.
 903  */
 904 static void array_element_release(Object *obj, const char *name, void *opaque)
 905 {
 906     ArrayElementProperty *p = opaque;
 907     if (p->release) {
 908         p->release(obj, name, opaque);
 909     }
 910     g_free(p->propname);
 911     g_free(p);
 912 }
 913
 914 static void set_prop_arraylen(Object *obj, Visitor *v, const char *name,
 915                               void *opaque, Error **errp)
 916 {
 917     /* Setter for the property which defines the length of a
 918      * variable-sized property array. As well as actually setting the
 919      * array-length field in the device struct, we have to create the
 920      * array itself and dynamically add the corresponding properties.
 921      */
 922     DeviceState *dev = DEVICE(obj);
 923     Property *prop = opaque;
 924     uint32_t *alenptr = qdev_get_prop_ptr(dev, prop);
 925     void **arrayptr = (void *)dev + prop->arrayoffset;
 926     Error *local_err = NULL;
 927     void *eltptr;
 928     const char *arrayname;
 929     int i;
 930
 931     if (dev->realized) {
 932         qdev_prop_set_after_realize(dev, name, errp);
 933         return;
 934     }
 935     if (*alenptr) {
 936         error_setg(errp, "array size property %s may not be set more than once",
 937                    name);
 938         return;
 939     }
 940     visit_type_uint32(v, name, alenptr, &local_err);
 941     if (local_err) {
 942         error_propagate(errp, local_err);
 943         return;
 944     }
 945     if (!*alenptr) {
 946         return;
 947     }
 948
 949     /* DEFINE_PROP_ARRAY guarantees that name should start with this prefix;
 950      * strip it off so we can get the name of the array itself.
 951      */
 952     assert(strncmp(name, PROP_ARRAY_LEN_PREFIX,
 953                    strlen(PROP_ARRAY_LEN_PREFIX)) == 0);
 954     arrayname = name + strlen(PROP_ARRAY_LEN_PREFIX);
 955
 956     /* Note that it is the responsibility of the individual device's deinit
 957      * to free the array proper.
 958      */
 959     *arrayptr = eltptr = g_malloc0(*alenptr * prop->arrayfieldsize);
 960     for (i = 0; i < *alenptr; i++, eltptr += prop->arrayfieldsize) {
 961         char *propname = g_strdup_printf("%s[%d]", arrayname, i);
 962         ArrayElementProperty *arrayprop = g_new0(ArrayElementProperty, 1);
 963         arrayprop->release = prop->arrayinfo->release;
 964         arrayprop->propname = propname;
 965         arrayprop->prop.info = prop->arrayinfo;
 966         arrayprop->prop.name = propname;
 967         /* This ugly piece of pointer arithmetic sets up the offset so
 968          * that when the underlying get/set hooks call qdev_get_prop_ptr
 969          * they get the right answer despite the array element not actually
 970          * being inside the device struct.
 971          */
 972         arrayprop->prop.offset = eltptr - (void *)dev;
 973         assert(qdev_get_prop_ptr(dev, &arrayprop->prop) == eltptr);
 974         object_property_add(obj, propname,
 975                             arrayprop->prop.info->name,
 976                             arrayprop->prop.info->get,
 977                             arrayprop->prop.info->set,
 978                             array_element_release,
 979                             arrayprop, &local_err);
 980         if (local_err) {
 981             error_propagate(errp, local_err);
 982             return;
 983         }
 984     }
 985 }
 986
 987 const PropertyInfo qdev_prop_arraylen = {
 988     .name = "uint32",
 989     .get = get_uint32,
 990     .set = set_prop_arraylen,
 991     .set_default_value = set_default_value_uint,
 992 };
 993
 994 /* --- public helpers --- */
 995
 996 static Property *qdev_prop_walk(Property *props, const char *name)
 997 {
 998     if (!props) {
 999         return NULL;
1000     }
1001     while (props->name) {
1002         if (strcmp(props->name, name) == 0) {
1003             return props;
1004         }
1005         props++;
1006     }
1007     return NULL;
1008 }
1009
1010 static Property *qdev_prop_find(DeviceState *dev, const char *name)
1011 {
1012     ObjectClass *class;
1013     Property *prop;
1014
1015     /* device properties */
1016     class = object_get_class(OBJECT(dev));
1017     do {
1018         prop = qdev_prop_walk(DEVICE_CLASS(class)->props, name);
1019         if (prop) {
1020             return prop;
1021         }
1022         class = object_class_get_parent(class);
1023     } while (class != object_class_by_name(TYPE_DEVICE));
1024
1025     return NULL;
1026 }
1027
1028 void error_set_from_qdev_prop_error(Error **errp, int ret, DeviceState *dev,
1029                                     Property *prop, const char *value)
1030 {
1031     switch (ret) {
1032     case -EEXIST:
1033         error_setg(errp, "Property '%s.%s' can't take value '%s', it's in use",
1034                   object_get_typename(OBJECT(dev)), prop->name, value);
1035         break;
1036     default:
1037     case -EINVAL:
1038         error_setg(errp, QERR_PROPERTY_VALUE_BAD,
1039                    object_get_typename(OBJECT(dev)), prop->name, value);
1040         break;
1041     case -ENOENT:
1042         error_setg(errp, "Property '%s.%s' can't find value '%s'",
1043                   object_get_typename(OBJECT(dev)), prop->name, value);
1044         break;
1045     case 0:
1046         break;
1047     }
1048 }
1049
1050 void qdev_prop_set_bit(DeviceState *dev, const char *name, bool value)
1051 {
1052     object_property_set_bool(OBJECT(dev), value, name, &error_abort);
1053 }
1054
1055 void qdev_prop_set_uint8(DeviceState *dev, const char *name, uint8_t value)
1056 {
1057     object_property_set_int(OBJECT(dev), value, name, &error_abort);
1058 }
1059
1060 void qdev_prop_set_uint16(DeviceState *dev, const char *name, uint16_t value)
1061 {
1062     object_property_set_int(OBJECT(dev), value, name, &error_abort);
1063 }
1064
1065 void qdev_prop_set_uint32(DeviceState *dev, const char *name, uint32_t value)
1066 {
1067     object_property_set_int(OBJECT(dev), value, name, &error_abort);
1068 }
1069
1070 void qdev_prop_set_int32(DeviceState *dev, const char *name, int32_t value)
1071 {
1072     object_property_set_int(OBJECT(dev), value, name, &error_abort);
1073 }
1074
1075 void qdev_prop_set_uint64(DeviceState *dev, const char *name, uint64_t value)
1076 {
1077     object_property_set_int(OBJECT(dev), value, name, &error_abort);
1078 }
1079
1080 void qdev_prop_set_string(DeviceState *dev, const char *name, const char *value)
1081 {
1082     object_property_set_str(OBJECT(dev), value, name, &error_abort);
1083 }
1084
1085 void qdev_prop_set_macaddr(DeviceState *dev, const char *name,
1086                            const uint8_t *value)
1087 {
1088     char str[2 * 6 + 5 + 1];
1089     snprintf(str, sizeof(str), "%02x:%02x:%02x:%02x:%02x:%02x",
1090              value[0], value[1], value[2], value[3], value[4], value[5]);
1091
1092     object_property_set_str(OBJECT(dev), str, name, &error_abort);
1093 }
1094
1095 void qdev_prop_set_enum(DeviceState *dev, const char *name, int value)
1096 {
1097     Property *prop;
1098
1099     prop = qdev_prop_find(dev, name);
1100     object_property_set_str(OBJECT(dev),
1101                             qapi_enum_lookup(prop->info->enum_table, value),
1102                             name, &error_abort);
1103 }
1104
1105 void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value)
1106 {
1107     Property *prop;
1108     void **ptr;
1109
1110     prop = qdev_prop_find(dev, name);
1111     assert(prop && prop->info == &qdev_prop_ptr);
1112     ptr = qdev_get_prop_ptr(dev, prop);
1113     *ptr = value;
1114 }
1115
1116 static GList *global_props;
1117
1118 void qdev_prop_register_global(GlobalProperty *prop)
1119 {
1120     global_props = g_list_append(global_props, prop);
1121 }
1122
1123 void register_compat_prop(const char *driver,
1124                           const char *property,
1125                           const char *value)
1126 {
1127     GlobalProperty *p = g_new0(GlobalProperty, 1);
1128
1129     /* Any compat_props must never cause error */
1130     p->errp = &error_abort;
1131     p->driver = driver;
1132     p->property = property;
1133     p->value = value;
1134     qdev_prop_register_global(p);
1135 }
1136
1137 void register_compat_props_array(GlobalProperty *prop)
1138 {
1139     for (; prop && prop->driver; prop++) {
1140         register_compat_prop(prop->driver, prop->property, prop->value);
1141     }
1142 }
1143
1144 void qdev_prop_register_global_list(GlobalProperty *props)
1145 {
1146     int i;
1147
1148     for (i = 0; props[i].driver != NULL; i++) {
1149         qdev_prop_register_global(props+i);
1150     }
1151 }
1152
1153 int qdev_prop_check_globals(void)
1154 {
1155     GList *l;
1156     int ret = 0;
1157
1158     for (l = global_props; l; l = l->next) {
1159         GlobalProperty *prop = l->data;
1160         ObjectClass *oc;
1161         DeviceClass *dc;
1162         if (prop->used) {
1163             continue;
1164         }
1165         if (!prop->user_provided) {
1166             continue;
1167         }
1168         oc = object_class_by_name(prop->driver);
1169         oc = object_class_dynamic_cast(oc, TYPE_DEVICE);
1170         if (!oc) {
1171             warn_report("global %s.%s has invalid class name",
1172                         prop->driver, prop->property);
1173             ret = 1;
1174             continue;
1175         }
1176         dc = DEVICE_CLASS(oc);
1177         if (!dc->hotpluggable && !prop->used) {
1178             warn_report("global %s.%s=%s not used",
1179                         prop->driver, prop->property, prop->value);
1180             ret = 1;
1181             continue;
1182         }
1183     }
1184     return ret;
1185 }
1186
1187 void qdev_prop_set_globals(DeviceState *dev)
1188 {
1189     GList *l;
1190
1191     for (l = global_props; l; l = l->next) {
1192         GlobalProperty *prop = l->data;
1193         Error *err = NULL;
1194
1195         if (object_dynamic_cast(OBJECT(dev), prop->driver) == NULL) {
1196             continue;
1197         }
1198         prop->used = true;
1199         object_property_parse(OBJECT(dev), prop->value, prop->property, &err);
1200         if (err != NULL) {
1201             error_prepend(&err, "can't apply global %s.%s=%s: ",
1202                           prop->driver, prop->property, prop->value);
1203             if (!dev->hotplugged && prop->errp) {
1204                 error_propagate(prop->errp, err);
1205             } else {
1206                 assert(prop->user_provided);
1207                 warn_report_err(err);
1208             }
1209         }
1210     }
1211 }
1212
1213 /* --- 64bit unsigned int 'size' type --- */
1214
1215 static void get_size(Object *obj, Visitor *v, const char *name, void *opaque,
1216                      Error **errp)
1217 {
1218     DeviceState *dev = DEVICE(obj);
1219     Property *prop = opaque;
1220     uint64_t *ptr = qdev_get_prop_ptr(dev, prop);
1221
1222     visit_type_size(v, name, ptr, errp);
1223 }
1224
1225 static void set_size(Object *obj, Visitor *v, const char *name, void *opaque,
1226                      Error **errp)
1227 {
1228     DeviceState *dev = DEVICE(obj);
1229     Property *prop = opaque;
1230     uint64_t *ptr = qdev_get_prop_ptr(dev, prop);
1231
1232     visit_type_size(v, name, ptr, errp);
1233 }
1234
1235 const PropertyInfo qdev_prop_size = {
1236     .name  = "size",
1237     .get = get_size,
1238     .set = set_size,
1239     .set_default_value = set_default_value_uint,
1240 };
1241
1242 /* --- object link property --- */
1243
1244 static void create_link_property(Object *obj, Property *prop, Error **errp)
1245 {
1246     Object **child = qdev_get_prop_ptr(DEVICE(obj), prop);
1247
1248     object_property_add_link(obj, prop->name, prop->link_type,
1249                              child,
1250                              qdev_prop_allow_set_link_before_realize,
1251                              OBJ_PROP_LINK_UNREF_ON_RELEASE,
1252                              errp);
1253 }
1254
1255 const PropertyInfo qdev_prop_link = {
1256     .name = "link",
1257     .create = create_link_property,
1258 };