hw/core/qdev-properties.c

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