hw/qdev-properties.c

   1 #include "sysemu.h"
   2 #include "net.h"
   3 #include "qdev.h"
   4 #include "qerror.h"
   5
   6 void *qdev_get_prop_ptr(DeviceState *dev, Property *prop)
   7 {
   8     void *ptr = dev;
   9     ptr += prop->offset;
  10     return ptr;
  11 }
  12
  13 static uint32_t qdev_get_prop_mask(Property *prop)
  14 {
  15     assert(prop->info->type == PROP_TYPE_BIT);
  16     return 0x1 << prop->bitnr;
  17 }
  18
  19 static void bit_prop_set(DeviceState *dev, Property *props, bool val)
  20 {
  21     uint32_t *p = qdev_get_prop_ptr(dev, props);
  22     uint32_t mask = qdev_get_prop_mask(props);
  23     if (val)
  24         *p |= mask;
  25     else
  26         *p &= ~mask;
  27 }
  28
  29 static void qdev_prop_cpy(DeviceState *dev, Property *props, void *src)
  30 {
  31     if (props->info->type == PROP_TYPE_BIT) {
  32         bool *defval = src;
  33         bit_prop_set(dev, props, *defval);
  34     } else {
  35         char *dst = qdev_get_prop_ptr(dev, props);
  36         memcpy(dst, src, props->info->size);
  37     }
  38 }
  39
  40 /* Bit */
  41 static int parse_bit(DeviceState *dev, Property *prop, const char *str)
  42 {
  43     if (!strncasecmp(str, "on", 2))
  44         bit_prop_set(dev, prop, true);
  45     else if (!strncasecmp(str, "off", 3))
  46         bit_prop_set(dev, prop, false);
  47     else
  48         return -EINVAL;
  49     return 0;
  50 }
  51
  52 static int print_bit(DeviceState *dev, Property *prop, char *dest, size_t len)
  53 {
  54     uint8_t *p = qdev_get_prop_ptr(dev, prop);
  55     return snprintf(dest, len, (*p & qdev_get_prop_mask(prop)) ? "on" : "off");
  56 }
  57
  58 PropertyInfo qdev_prop_bit = {
  59     .name  = "on/off",
  60     .type  = PROP_TYPE_BIT,
  61     .size  = sizeof(uint32_t),
  62     .parse = parse_bit,
  63     .print = print_bit,
  64 };
  65
  66 /* --- 8bit integer --- */
  67
  68 static int parse_uint8(DeviceState *dev, Property *prop, const char *str)
  69 {
  70     uint8_t *ptr = qdev_get_prop_ptr(dev, prop);
  71     const char *fmt;
  72
  73     /* accept both hex and decimal */
  74     fmt = strncasecmp(str, "0x",2) == 0 ? "%" PRIx8 : "%" PRIu8;
  75     if (sscanf(str, fmt, ptr) != 1)
  76         return -EINVAL;
  77     return 0;
  78 }
  79
  80 static int print_uint8(DeviceState *dev, Property *prop, char *dest, size_t len)
  81 {
  82     uint8_t *ptr = qdev_get_prop_ptr(dev, prop);
  83     return snprintf(dest, len, "%" PRIu8, *ptr);
  84 }
  85
  86 PropertyInfo qdev_prop_uint8 = {
  87     .name  = "uint8",
  88     .type  = PROP_TYPE_UINT8,
  89     .size  = sizeof(uint8_t),
  90     .parse = parse_uint8,
  91     .print = print_uint8,
  92 };
  93
  94 /* --- 16bit integer --- */
  95
  96 static int parse_uint16(DeviceState *dev, Property *prop, const char *str)
  97 {
  98     uint16_t *ptr = qdev_get_prop_ptr(dev, prop);
  99     const char *fmt;
 100
 101     /* accept both hex and decimal */
 102     fmt = strncasecmp(str, "0x",2) == 0 ? "%" PRIx16 : "%" PRIu16;
 103     if (sscanf(str, fmt, ptr) != 1)
 104         return -EINVAL;
 105     return 0;
 106 }
 107
 108 static int print_uint16(DeviceState *dev, Property *prop, char *dest, size_t len)
 109 {
 110     uint16_t *ptr = qdev_get_prop_ptr(dev, prop);
 111     return snprintf(dest, len, "%" PRIu16, *ptr);
 112 }
 113
 114 PropertyInfo qdev_prop_uint16 = {
 115     .name  = "uint16",
 116     .type  = PROP_TYPE_UINT16,
 117     .size  = sizeof(uint16_t),
 118     .parse = parse_uint16,
 119     .print = print_uint16,
 120 };
 121
 122 /* --- 32bit integer --- */
 123
 124 static int parse_uint32(DeviceState *dev, Property *prop, const char *str)
 125 {
 126     uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
 127     const char *fmt;
 128
 129     /* accept both hex and decimal */
 130     fmt = strncasecmp(str, "0x",2) == 0 ? "%" PRIx32 : "%" PRIu32;
 131     if (sscanf(str, fmt, ptr) != 1)
 132         return -EINVAL;
 133     return 0;
 134 }
 135
 136 static int print_uint32(DeviceState *dev, Property *prop, char *dest, size_t len)
 137 {
 138     uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
 139     return snprintf(dest, len, "%" PRIu32, *ptr);
 140 }
 141
 142 PropertyInfo qdev_prop_uint32 = {
 143     .name  = "uint32",
 144     .type  = PROP_TYPE_UINT32,
 145     .size  = sizeof(uint32_t),
 146     .parse = parse_uint32,
 147     .print = print_uint32,
 148 };
 149
 150 static int parse_int32(DeviceState *dev, Property *prop, const char *str)
 151 {
 152     int32_t *ptr = qdev_get_prop_ptr(dev, prop);
 153
 154     if (sscanf(str, "%" PRId32, ptr) != 1)
 155         return -EINVAL;
 156     return 0;
 157 }
 158
 159 static int print_int32(DeviceState *dev, Property *prop, char *dest, size_t len)
 160 {
 161     int32_t *ptr = qdev_get_prop_ptr(dev, prop);
 162     return snprintf(dest, len, "%" PRId32, *ptr);
 163 }
 164
 165 PropertyInfo qdev_prop_int32 = {
 166     .name  = "int32",
 167     .type  = PROP_TYPE_INT32,
 168     .size  = sizeof(int32_t),
 169     .parse = parse_int32,
 170     .print = print_int32,
 171 };
 172
 173 /* --- 32bit hex value --- */
 174
 175 static int parse_hex32(DeviceState *dev, Property *prop, const char *str)
 176 {
 177     uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
 178
 179     if (sscanf(str, "%" PRIx32, ptr) != 1)
 180         return -EINVAL;
 181     return 0;
 182 }
 183
 184 static int print_hex32(DeviceState *dev, Property *prop, char *dest, size_t len)
 185 {
 186     uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
 187     return snprintf(dest, len, "0x%" PRIx32, *ptr);
 188 }
 189
 190 PropertyInfo qdev_prop_hex32 = {
 191     .name  = "hex32",
 192     .type  = PROP_TYPE_UINT32,
 193     .size  = sizeof(uint32_t),
 194     .parse = parse_hex32,
 195     .print = print_hex32,
 196 };
 197
 198 /* --- 64bit integer --- */
 199
 200 static int parse_uint64(DeviceState *dev, Property *prop, const char *str)
 201 {
 202     uint64_t *ptr = qdev_get_prop_ptr(dev, prop);
 203     const char *fmt;
 204
 205     /* accept both hex and decimal */
 206     fmt = strncasecmp(str, "0x",2) == 0 ? "%" PRIx64 : "%" PRIu64;
 207     if (sscanf(str, fmt, ptr) != 1)
 208         return -EINVAL;
 209     return 0;
 210 }
 211
 212 static int print_uint64(DeviceState *dev, Property *prop, char *dest, size_t len)
 213 {
 214     uint64_t *ptr = qdev_get_prop_ptr(dev, prop);
 215     return snprintf(dest, len, "%" PRIu64, *ptr);
 216 }
 217
 218 PropertyInfo qdev_prop_uint64 = {
 219     .name  = "uint64",
 220     .type  = PROP_TYPE_UINT64,
 221     .size  = sizeof(uint64_t),
 222     .parse = parse_uint64,
 223     .print = print_uint64,
 224 };
 225
 226 /* --- 64bit hex value --- */
 227
 228 static int parse_hex64(DeviceState *dev, Property *prop, const char *str)
 229 {
 230     uint64_t *ptr = qdev_get_prop_ptr(dev, prop);
 231
 232     if (sscanf(str, "%" PRIx64, ptr) != 1)
 233         return -EINVAL;
 234     return 0;
 235 }
 236
 237 static int print_hex64(DeviceState *dev, Property *prop, char *dest, size_t len)
 238 {
 239     uint64_t *ptr = qdev_get_prop_ptr(dev, prop);
 240     return snprintf(dest, len, "0x%" PRIx64, *ptr);
 241 }
 242
 243 PropertyInfo qdev_prop_hex64 = {
 244     .name  = "hex64",
 245     .type  = PROP_TYPE_UINT64,
 246     .size  = sizeof(uint64_t),
 247     .parse = parse_hex64,
 248     .print = print_hex64,
 249 };
 250
 251 /* --- string --- */
 252
 253 static int parse_string(DeviceState *dev, Property *prop, const char *str)
 254 {
 255     char **ptr = qdev_get_prop_ptr(dev, prop);
 256
 257     if (*ptr)
 258         qemu_free(*ptr);
 259     *ptr = qemu_strdup(str);
 260     return 0;
 261 }
 262
 263 static int print_string(DeviceState *dev, Property *prop, char *dest, size_t len)
 264 {
 265     char **ptr = qdev_get_prop_ptr(dev, prop);
 266     if (!*ptr)
 267         return snprintf(dest, len, "<null>");
 268     return snprintf(dest, len, "\"%s\"", *ptr);
 269 }
 270
 271 PropertyInfo qdev_prop_string = {
 272     .name  = "string",
 273     .type  = PROP_TYPE_STRING,
 274     .size  = sizeof(char*),
 275     .parse = parse_string,
 276     .print = print_string,
 277 };
 278
 279 /* --- drive --- */
 280
 281 static int parse_drive(DeviceState *dev, Property *prop, const char *str)
 282 {
 283     DriveInfo **ptr = qdev_get_prop_ptr(dev, prop);
 284
 285     *ptr = drive_get_by_id(str);
 286     if (*ptr == NULL)
 287         return -ENOENT;
 288     return 0;
 289 }
 290
 291 static int print_drive(DeviceState *dev, Property *prop, char *dest, size_t len)
 292 {
 293     DriveInfo **ptr = qdev_get_prop_ptr(dev, prop);
 294     return snprintf(dest, len, "%s", (*ptr) ? (*ptr)->id : "<null>");
 295 }
 296
 297 PropertyInfo qdev_prop_drive = {
 298     .name  = "drive",
 299     .type  = PROP_TYPE_DRIVE,
 300     .size  = sizeof(DriveInfo*),
 301     .parse = parse_drive,
 302     .print = print_drive,
 303 };
 304
 305 /* --- character device --- */
 306
 307 static int parse_chr(DeviceState *dev, Property *prop, const char *str)
 308 {
 309     CharDriverState **ptr = qdev_get_prop_ptr(dev, prop);
 310
 311     *ptr = qemu_chr_find(str);
 312     if (*ptr == NULL)
 313         return -ENOENT;
 314     return 0;
 315 }
 316
 317 static int print_chr(DeviceState *dev, Property *prop, char *dest, size_t len)
 318 {
 319     CharDriverState **ptr = qdev_get_prop_ptr(dev, prop);
 320
 321     if (*ptr && (*ptr)->label) {
 322         return snprintf(dest, len, "%s", (*ptr)->label);
 323     } else {
 324         return snprintf(dest, len, "<null>");
 325     }
 326 }
 327
 328 PropertyInfo qdev_prop_chr = {
 329     .name  = "chr",
 330     .type  = PROP_TYPE_CHR,
 331     .size  = sizeof(CharDriverState*),
 332     .parse = parse_chr,
 333     .print = print_chr,
 334 };
 335
 336 /* --- netdev device --- */
 337
 338 static int parse_netdev(DeviceState *dev, Property *prop, const char *str)
 339 {
 340     VLANClientState **ptr = qdev_get_prop_ptr(dev, prop);
 341
 342     *ptr = qemu_find_netdev(str);
 343     if (*ptr == NULL)
 344         return -ENOENT;
 345     if ((*ptr)->peer) {
 346         return -EEXIST;
 347     }
 348     return 0;
 349 }
 350
 351 static int print_netdev(DeviceState *dev, Property *prop, char *dest, size_t len)
 352 {
 353     VLANClientState **ptr = qdev_get_prop_ptr(dev, prop);
 354
 355     if (*ptr && (*ptr)->name) {
 356         return snprintf(dest, len, "%s", (*ptr)->name);
 357     } else {
 358         return snprintf(dest, len, "<null>");
 359     }
 360 }
 361
 362 PropertyInfo qdev_prop_netdev = {
 363     .name  = "netdev",
 364     .type  = PROP_TYPE_NETDEV,
 365     .size  = sizeof(VLANClientState*),
 366     .parse = parse_netdev,
 367     .print = print_netdev,
 368 };
 369
 370 /* --- vlan --- */
 371
 372 static int parse_vlan(DeviceState *dev, Property *prop, const char *str)
 373 {
 374     VLANState **ptr = qdev_get_prop_ptr(dev, prop);
 375     int id;
 376
 377     if (sscanf(str, "%d", &id) != 1)
 378         return -EINVAL;
 379     *ptr = qemu_find_vlan(id, 1);
 380     if (*ptr == NULL)
 381         return -ENOENT;
 382     return 0;
 383 }
 384
 385 static int print_vlan(DeviceState *dev, Property *prop, char *dest, size_t len)
 386 {
 387     VLANState **ptr = qdev_get_prop_ptr(dev, prop);
 388
 389     if (*ptr) {
 390         return snprintf(dest, len, "%d", (*ptr)->id);
 391     } else {
 392         return snprintf(dest, len, "<null>");
 393     }
 394 }
 395
 396 PropertyInfo qdev_prop_vlan = {
 397     .name  = "vlan",
 398     .type  = PROP_TYPE_VLAN,
 399     .size  = sizeof(VLANClientState*),
 400     .parse = parse_vlan,
 401     .print = print_vlan,
 402 };
 403
 404 /* --- pointer --- */
 405
 406 /* Not a proper property, just for dirty hacks.  TODO Remove it!  */
 407 PropertyInfo qdev_prop_ptr = {
 408     .name  = "ptr",
 409     .type  = PROP_TYPE_PTR,
 410     .size  = sizeof(void*),
 411 };
 412
 413 /* --- mac address --- */
 414
 415 /*
 416  * accepted syntax versions:
 417  *   01:02:03:04:05:06
 418  *   01-02-03-04-05-06
 419  */
 420 static int parse_mac(DeviceState *dev, Property *prop, const char *str)
 421 {
 422     MACAddr *mac = qdev_get_prop_ptr(dev, prop);
 423     int i, pos;
 424     char *p;
 425
 426     for (i = 0, pos = 0; i < 6; i++, pos += 3) {
 427         if (!qemu_isxdigit(str[pos]))
 428             return -EINVAL;
 429         if (!qemu_isxdigit(str[pos+1]))
 430             return -EINVAL;
 431         if (i == 5) {
 432             if (str[pos+2] != '\0')
 433                 return -EINVAL;
 434         } else {
 435             if (str[pos+2] != ':' && str[pos+2] != '-')
 436                 return -EINVAL;
 437         }
 438         mac->a[i] = strtol(str+pos, &p, 16);
 439     }
 440     return 0;
 441 }
 442
 443 static int print_mac(DeviceState *dev, Property *prop, char *dest, size_t len)
 444 {
 445     MACAddr *mac = qdev_get_prop_ptr(dev, prop);
 446
 447     return snprintf(dest, len, "%02x:%02x:%02x:%02x:%02x:%02x",
 448                     mac->a[0], mac->a[1], mac->a[2],
 449                     mac->a[3], mac->a[4], mac->a[5]);
 450 }
 451
 452 PropertyInfo qdev_prop_macaddr = {
 453     .name  = "macaddr",
 454     .type  = PROP_TYPE_MACADDR,
 455     .size  = sizeof(MACAddr),
 456     .parse = parse_mac,
 457     .print = print_mac,
 458 };
 459
 460 /* --- pci address --- */
 461
 462 /*
 463  * bus-local address, i.e. "$slot" or "$slot.$fn"
 464  */
 465 static int parse_pci_devfn(DeviceState *dev, Property *prop, const char *str)
 466 {
 467     uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
 468     unsigned int slot, fn, n;
 469
 470     if (sscanf(str, "%x.%x%n", &slot, &fn, &n) != 2) {
 471         fn = 0;
 472         if (sscanf(str, "%x%n", &slot, &n) != 1) {
 473             return -EINVAL;
 474         }
 475     }
 476     if (str[n] != '\0')
 477         return -EINVAL;
 478     if (fn > 7)
 479         return -EINVAL;
 480     *ptr = slot << 3 | fn;
 481     return 0;
 482 }
 483
 484 static int print_pci_devfn(DeviceState *dev, Property *prop, char *dest, size_t len)
 485 {
 486     uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
 487
 488     if (*ptr == -1) {
 489         return snprintf(dest, len, "<unset>");
 490     } else {
 491         return snprintf(dest, len, "%02x.%x", *ptr >> 3, *ptr & 7);
 492     }
 493 }
 494
 495 PropertyInfo qdev_prop_pci_devfn = {
 496     .name  = "pci-devfn",
 497     .type  = PROP_TYPE_UINT32,
 498     .size  = sizeof(uint32_t),
 499     .parse = parse_pci_devfn,
 500     .print = print_pci_devfn,
 501 };
 502
 503 /* --- public helpers --- */
 504
 505 static Property *qdev_prop_walk(Property *props, const char *name)
 506 {
 507     if (!props)
 508         return NULL;
 509     while (props->name) {
 510         if (strcmp(props->name, name) == 0)
 511             return props;
 512         props++;
 513     }
 514     return NULL;
 515 }
 516
 517 static Property *qdev_prop_find(DeviceState *dev, const char *name)
 518 {
 519     Property *prop;
 520
 521     /* device properties */
 522     prop = qdev_prop_walk(dev->info->props, name);
 523     if (prop)
 524         return prop;
 525
 526     /* bus properties */
 527     prop = qdev_prop_walk(dev->parent_bus->info->props, name);
 528     if (prop)
 529         return prop;
 530
 531     return NULL;
 532 }
 533
 534 int qdev_prop_exists(DeviceState *dev, const char *name)
 535 {
 536     return qdev_prop_find(dev, name) ? true : false;
 537 }
 538
 539 int qdev_prop_parse(DeviceState *dev, const char *name, const char *value)
 540 {
 541     Property *prop;
 542     int ret;
 543
 544     prop = qdev_prop_find(dev, name);
 545     /*
 546      * TODO Properties without a parse method are just for dirty
 547      * hacks.  qdev_prop_ptr is the only such PropertyInfo.  It's
 548      * marked for removal.  The test !prop->info->parse should be
 549      * removed along with it.
 550      */
 551     if (!prop || !prop->info->parse) {
 552         qerror_report(QERR_PROPERTY_NOT_FOUND, dev->info->name, name);
 553         return -1;
 554     }
 555     ret = prop->info->parse(dev, prop, value);
 556     if (ret < 0) {
 557         switch (ret) {
 558         case -EEXIST:
 559             qerror_report(QERR_PROPERTY_VALUE_IN_USE,
 560                           dev->info->name, name, value);
 561             break;
 562         default:
 563         case -EINVAL:
 564             qerror_report(QERR_PROPERTY_VALUE_BAD,
 565                           dev->info->name, name, value);
 566             break;
 567         case -ENOENT:
 568             qerror_report(QERR_PROPERTY_VALUE_NOT_FOUND,
 569                           dev->info->name, name, value);
 570             break;
 571         }
 572         return -1;
 573     }
 574     return 0;
 575 }
 576
 577 void qdev_prop_set(DeviceState *dev, const char *name, void *src, enum PropertyType type)
 578 {
 579     Property *prop;
 580
 581     prop = qdev_prop_find(dev, name);
 582     if (!prop) {
 583         fprintf(stderr, "%s: property \"%s.%s\" not found\n",
 584                 __FUNCTION__, dev->info->name, name);
 585         abort();
 586     }
 587     if (prop->info->type != type) {
 588         fprintf(stderr, "%s: property \"%s.%s\" type mismatch\n",
 589                 __FUNCTION__, dev->info->name, name);
 590         abort();
 591     }
 592     qdev_prop_cpy(dev, prop, src);
 593 }
 594
 595 void qdev_prop_set_uint8(DeviceState *dev, const char *name, uint8_t value)
 596 {
 597     qdev_prop_set(dev, name, &value, PROP_TYPE_UINT8);
 598 }
 599
 600 void qdev_prop_set_uint16(DeviceState *dev, const char *name, uint16_t value)
 601 {
 602     qdev_prop_set(dev, name, &value, PROP_TYPE_UINT16);
 603 }
 604
 605 void qdev_prop_set_uint32(DeviceState *dev, const char *name, uint32_t value)
 606 {
 607     qdev_prop_set(dev, name, &value, PROP_TYPE_UINT32);
 608 }
 609
 610 void qdev_prop_set_int32(DeviceState *dev, const char *name, int32_t value)
 611 {
 612     qdev_prop_set(dev, name, &value, PROP_TYPE_INT32);
 613 }
 614
 615 void qdev_prop_set_uint64(DeviceState *dev, const char *name, uint64_t value)
 616 {
 617     qdev_prop_set(dev, name, &value, PROP_TYPE_UINT64);
 618 }
 619
 620 void qdev_prop_set_drive(DeviceState *dev, const char *name, DriveInfo *value)
 621 {
 622     qdev_prop_set(dev, name, &value, PROP_TYPE_DRIVE);
 623 }
 624
 625 void qdev_prop_set_chr(DeviceState *dev, const char *name, CharDriverState *value)
 626 {
 627     qdev_prop_set(dev, name, &value, PROP_TYPE_CHR);
 628 }
 629
 630 void qdev_prop_set_netdev(DeviceState *dev, const char *name, VLANClientState *value)
 631 {
 632     qdev_prop_set(dev, name, &value, PROP_TYPE_NETDEV);
 633 }
 634
 635 void qdev_prop_set_vlan(DeviceState *dev, const char *name, VLANState *value)
 636 {
 637     qdev_prop_set(dev, name, &value, PROP_TYPE_VLAN);
 638 }
 639
 640 void qdev_prop_set_macaddr(DeviceState *dev, const char *name, uint8_t *value)
 641 {
 642     qdev_prop_set(dev, name, value, PROP_TYPE_MACADDR);
 643 }
 644
 645 void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value)
 646 {
 647     qdev_prop_set(dev, name, &value, PROP_TYPE_PTR);
 648 }
 649
 650 void qdev_prop_set_defaults(DeviceState *dev, Property *props)
 651 {
 652     if (!props)
 653         return;
 654     while (props->name) {
 655         if (props->defval) {
 656             qdev_prop_cpy(dev, props, props->defval);
 657         }
 658         props++;
 659     }
 660 }
 661
 662 static QTAILQ_HEAD(, GlobalProperty) global_props = QTAILQ_HEAD_INITIALIZER(global_props);
 663
 664 static void qdev_prop_register_global(GlobalProperty *prop)
 665 {
 666     QTAILQ_INSERT_TAIL(&global_props, prop, next);
 667 }
 668
 669 void qdev_prop_register_global_list(GlobalProperty *props)
 670 {
 671     int i;
 672
 673     for (i = 0; props[i].driver != NULL; i++) {
 674         qdev_prop_register_global(props+i);
 675     }
 676 }
 677
 678 void qdev_prop_set_globals(DeviceState *dev)
 679 {
 680     GlobalProperty *prop;
 681
 682     QTAILQ_FOREACH(prop, &global_props, next) {
 683         if (strcmp(dev->info->name, prop->driver) != 0 &&
 684             strcmp(dev->info->bus_info->name, prop->driver) != 0) {
 685             continue;
 686         }
 687         if (qdev_prop_parse(dev, prop->property, prop->value) != 0) {
 688             exit(1);
 689         }
 690     }
 691 }
 692
 693 static int qdev_add_one_global(QemuOpts *opts, void *opaque)
 694 {
 695     GlobalProperty *g;
 696
 697     g = qemu_mallocz(sizeof(*g));
 698     g->driver   = qemu_opt_get(opts, "driver");
 699     g->property = qemu_opt_get(opts, "property");
 700     g->value    = qemu_opt_get(opts, "value");
 701     qdev_prop_register_global(g);
 702     return 0;
 703 }
 704
 705 void qemu_add_globals(void)
 706 {
 707     qemu_opts_foreach(&qemu_global_opts, qdev_add_one_global, NULL, 0);
 708 }