qdev-monitor.c

   1 /*
   2  *  Dynamic device configuration and creation.
   3  *
   4  *  Copyright (c) 2009 CodeSourcery
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "hw/qdev.h"
  21 #include "hw/sysbus.h"
  22 #include "monitor/monitor.h"
  23 #include "monitor/qdev.h"
  24 #include "qmp-commands.h"
  25 #include "sysemu/arch_init.h"
  26 #include "qemu/config-file.h"
  27
  28 /*
  29  * Aliases were a bad idea from the start.  Let's keep them
  30  * from spreading further.
  31  */
  32 typedef struct QDevAlias
  33 {
  34     const char *typename;
  35     const char *alias;
  36     uint32_t arch_mask;
  37 } QDevAlias;
  38
  39 static const QDevAlias qdev_alias_table[] = {
  40     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  41     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  42     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  43     { "virtio-balloon-pci", "virtio-balloon",
  44             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  45     { "virtio-blk-s390", "virtio-blk", QEMU_ARCH_S390X },
  46     { "virtio-net-s390", "virtio-net", QEMU_ARCH_S390X },
  47     { "virtio-serial-s390", "virtio-serial", QEMU_ARCH_S390X },
  48     { "lsi53c895a", "lsi" },
  49     { "ich9-ahci", "ahci" },
  50     { "kvm-pci-assign", "pci-assign" },
  51     { }
  52 };
  53
  54 static const char *qdev_class_get_alias(DeviceClass *dc)
  55 {
  56     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  57     int i;
  58
  59     for (i = 0; qdev_alias_table[i].typename; i++) {
  60         if (qdev_alias_table[i].arch_mask &&
  61             !(qdev_alias_table[i].arch_mask & arch_type)) {
  62             continue;
  63         }
  64
  65         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
  66             return qdev_alias_table[i].alias;
  67         }
  68     }
  69
  70     return NULL;
  71 }
  72
  73 static bool qdev_class_has_alias(DeviceClass *dc)
  74 {
  75     return (qdev_class_get_alias(dc) != NULL);
  76 }
  77
  78 static void qdev_print_devinfo(DeviceClass *dc)
  79 {
  80     error_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
  81     if (dc->bus_type) {
  82         error_printf(", bus %s", dc->bus_type);
  83     }
  84     if (qdev_class_has_alias(dc)) {
  85         error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
  86     }
  87     if (dc->desc) {
  88         error_printf(", desc \"%s\"", dc->desc);
  89     }
  90     if (dc->cannot_instantiate_with_device_add_yet) {
  91         error_printf(", no-user");
  92     }
  93     error_printf("\n");
  94 }
  95
  96 static gint devinfo_cmp(gconstpointer a, gconstpointer b)
  97 {
  98     return strcasecmp(object_class_get_name((ObjectClass *)a),
  99                       object_class_get_name((ObjectClass *)b));
 100 }
 101
 102 static void qdev_print_devinfos(bool show_no_user)
 103 {
 104     static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
 105         [DEVICE_CATEGORY_BRIDGE]  = "Controller/Bridge/Hub",
 106         [DEVICE_CATEGORY_USB]     = "USB",
 107         [DEVICE_CATEGORY_STORAGE] = "Storage",
 108         [DEVICE_CATEGORY_NETWORK] = "Network",
 109         [DEVICE_CATEGORY_INPUT]   = "Input",
 110         [DEVICE_CATEGORY_DISPLAY] = "Display",
 111         [DEVICE_CATEGORY_SOUND]   = "Sound",
 112         [DEVICE_CATEGORY_MISC]    = "Misc",
 113         [DEVICE_CATEGORY_MAX]     = "Uncategorized",
 114     };
 115     GSList *list, *elt;
 116     int i;
 117     bool cat_printed;
 118
 119     list = g_slist_sort(object_class_get_list(TYPE_DEVICE, false),
 120                         devinfo_cmp);
 121
 122     for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
 123         cat_printed = false;
 124         for (elt = list; elt; elt = elt->next) {
 125             DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
 126                                                  TYPE_DEVICE);
 127             if ((i < DEVICE_CATEGORY_MAX
 128                  ? !test_bit(i, dc->categories)
 129                  : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
 130                 || (!show_no_user
 131                     && dc->cannot_instantiate_with_device_add_yet)) {
 132                 continue;
 133             }
 134             if (!cat_printed) {
 135                 error_printf("%s%s devices:\n", i ? "\n" : "",
 136                              cat_name[i]);
 137                 cat_printed = true;
 138             }
 139             qdev_print_devinfo(dc);
 140         }
 141     }
 142
 143     g_slist_free(list);
 144 }
 145
 146 static int set_property(const char *name, const char *value, void *opaque)
 147 {
 148     Object *obj = opaque;
 149     Error *err = NULL;
 150
 151     if (strcmp(name, "driver") == 0)
 152         return 0;
 153     if (strcmp(name, "bus") == 0)
 154         return 0;
 155
 156     object_property_parse(obj, value, name, &err);
 157     if (err != NULL) {
 158         qerror_report_err(err);
 159         error_free(err);
 160         return -1;
 161     }
 162     return 0;
 163 }
 164
 165 static const char *find_typename_by_alias(const char *alias)
 166 {
 167     int i;
 168
 169     for (i = 0; qdev_alias_table[i].alias; i++) {
 170         if (qdev_alias_table[i].arch_mask &&
 171             !(qdev_alias_table[i].arch_mask & arch_type)) {
 172             continue;
 173         }
 174
 175         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 176             return qdev_alias_table[i].typename;
 177         }
 178     }
 179
 180     return NULL;
 181 }
 182
 183 int qdev_device_help(QemuOpts *opts)
 184 {
 185     Error *local_err = NULL;
 186     const char *driver;
 187     DevicePropertyInfoList *prop_list;
 188     DevicePropertyInfoList *prop;
 189
 190     driver = qemu_opt_get(opts, "driver");
 191     if (driver && is_help_option(driver)) {
 192         qdev_print_devinfos(false);
 193         return 1;
 194     }
 195
 196     if (!driver || !qemu_opt_has_help_opt(opts)) {
 197         return 0;
 198     }
 199
 200     if (!object_class_by_name(driver)) {
 201         const char *typename = find_typename_by_alias(driver);
 202
 203         if (typename) {
 204             driver = typename;
 205         }
 206     }
 207
 208     prop_list = qmp_device_list_properties(driver, &local_err);
 209     if (!prop_list) {
 210         error_printf("%s\n", error_get_pretty(local_err));
 211         error_free(local_err);
 212         return 1;
 213     }
 214
 215     for (prop = prop_list; prop; prop = prop->next) {
 216         error_printf("%s.%s=%s\n", driver,
 217                      prop->value->name,
 218                      prop->value->type);
 219     }
 220
 221     qapi_free_DevicePropertyInfoList(prop_list);
 222     return 1;
 223 }
 224
 225 static Object *qdev_get_peripheral(void)
 226 {
 227     static Object *dev;
 228
 229     if (dev == NULL) {
 230         dev = container_get(qdev_get_machine(), "/peripheral");
 231     }
 232
 233     return dev;
 234 }
 235
 236 static Object *qdev_get_peripheral_anon(void)
 237 {
 238     static Object *dev;
 239
 240     if (dev == NULL) {
 241         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 242     }
 243
 244     return dev;
 245 }
 246
 247 static void qbus_list_bus(DeviceState *dev)
 248 {
 249     BusState *child;
 250     const char *sep = " ";
 251
 252     error_printf("child busses at \"%s\":",
 253                  dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 254     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 255         error_printf("%s\"%s\"", sep, child->name);
 256         sep = ", ";
 257     }
 258     error_printf("\n");
 259 }
 260
 261 static void qbus_list_dev(BusState *bus)
 262 {
 263     BusChild *kid;
 264     const char *sep = " ";
 265
 266     error_printf("devices at \"%s\":", bus->name);
 267     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 268         DeviceState *dev = kid->child;
 269         error_printf("%s\"%s\"", sep, object_get_typename(OBJECT(dev)));
 270         if (dev->id)
 271             error_printf("/\"%s\"", dev->id);
 272         sep = ", ";
 273     }
 274     error_printf("\n");
 275 }
 276
 277 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 278 {
 279     BusState *child;
 280
 281     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 282         if (strcmp(child->name, elem) == 0) {
 283             return child;
 284         }
 285     }
 286     return NULL;
 287 }
 288
 289 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 290 {
 291     BusChild *kid;
 292
 293     /*
 294      * try to match in order:
 295      *   (1) instance id, if present
 296      *   (2) driver name
 297      *   (3) driver alias, if present
 298      */
 299     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 300         DeviceState *dev = kid->child;
 301         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 302             return dev;
 303         }
 304     }
 305     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 306         DeviceState *dev = kid->child;
 307         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 308             return dev;
 309         }
 310     }
 311     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 312         DeviceState *dev = kid->child;
 313         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 314
 315         if (qdev_class_has_alias(dc) &&
 316             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 317             return dev;
 318         }
 319     }
 320     return NULL;
 321 }
 322
 323 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 324                                      const char *bus_typename)
 325 {
 326     BusClass *bus_class = BUS_GET_CLASS(bus);
 327     BusChild *kid;
 328     BusState *child, *ret;
 329     int match = 1;
 330
 331     if (name && (strcmp(bus->name, name) != 0)) {
 332         match = 0;
 333     } else if (bus_typename && !object_dynamic_cast(OBJECT(bus), bus_typename)) {
 334         match = 0;
 335     } else if ((bus_class->max_dev != 0) && (bus_class->max_dev <= bus->max_index)) {
 336         if (name != NULL) {
 337             /* bus was explicitly specified: return an error. */
 338             qerror_report(ERROR_CLASS_GENERIC_ERROR, "Bus '%s' is full",
 339                           bus->name);
 340             return NULL;
 341         } else {
 342             /* bus was not specified: try to find another one. */
 343             match = 0;
 344         }
 345     }
 346     if (match) {
 347         return bus;
 348     }
 349
 350     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 351         DeviceState *dev = kid->child;
 352         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 353             ret = qbus_find_recursive(child, name, bus_typename);
 354             if (ret) {
 355                 return ret;
 356             }
 357         }
 358     }
 359     return NULL;
 360 }
 361
 362 static BusState *qbus_find(const char *path)
 363 {
 364     DeviceState *dev;
 365     BusState *bus;
 366     char elem[128];
 367     int pos, len;
 368
 369     /* find start element */
 370     if (path[0] == '/') {
 371         bus = sysbus_get_default();
 372         pos = 0;
 373     } else {
 374         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 375             assert(!path[0]);
 376             elem[0] = len = 0;
 377         }
 378         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 379         if (!bus) {
 380             qerror_report(QERR_BUS_NOT_FOUND, elem);
 381             return NULL;
 382         }
 383         pos = len;
 384     }
 385
 386     for (;;) {
 387         assert(path[pos] == '/' || !path[pos]);
 388         while (path[pos] == '/') {
 389             pos++;
 390         }
 391         if (path[pos] == '\0') {
 392             return bus;
 393         }
 394
 395         /* find device */
 396         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 397             g_assert_not_reached();
 398             elem[0] = len = 0;
 399         }
 400         pos += len;
 401         dev = qbus_find_dev(bus, elem);
 402         if (!dev) {
 403             qerror_report(QERR_DEVICE_NOT_FOUND, elem);
 404             if (!monitor_cur_is_qmp()) {
 405                 qbus_list_dev(bus);
 406             }
 407             return NULL;
 408         }
 409
 410         assert(path[pos] == '/' || !path[pos]);
 411         while (path[pos] == '/') {
 412             pos++;
 413         }
 414         if (path[pos] == '\0') {
 415             /* last specified element is a device.  If it has exactly
 416              * one child bus accept it nevertheless */
 417             switch (dev->num_child_bus) {
 418             case 0:
 419                 qerror_report(ERROR_CLASS_GENERIC_ERROR,
 420                               "Device '%s' has no child bus", elem);
 421                 return NULL;
 422             case 1:
 423                 return QLIST_FIRST(&dev->child_bus);
 424             default:
 425                 qerror_report(ERROR_CLASS_GENERIC_ERROR,
 426                               "Device '%s' has multiple child busses", elem);
 427                 if (!monitor_cur_is_qmp()) {
 428                     qbus_list_bus(dev);
 429                 }
 430                 return NULL;
 431             }
 432         }
 433
 434         /* find bus */
 435         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 436             g_assert_not_reached();
 437             elem[0] = len = 0;
 438         }
 439         pos += len;
 440         bus = qbus_find_bus(dev, elem);
 441         if (!bus) {
 442             qerror_report(QERR_BUS_NOT_FOUND, elem);
 443             if (!monitor_cur_is_qmp()) {
 444                 qbus_list_bus(dev);
 445             }
 446             return NULL;
 447         }
 448     }
 449 }
 450
 451 DeviceState *qdev_device_add(QemuOpts *opts)
 452 {
 453     ObjectClass *oc;
 454     DeviceClass *dc;
 455     const char *driver, *path, *id;
 456     DeviceState *dev;
 457     BusState *bus = NULL;
 458     Error *err = NULL;
 459
 460     driver = qemu_opt_get(opts, "driver");
 461     if (!driver) {
 462         qerror_report(QERR_MISSING_PARAMETER, "driver");
 463         return NULL;
 464     }
 465
 466     /* find driver */
 467     oc = object_class_by_name(driver);
 468     if (!oc) {
 469         const char *typename = find_typename_by_alias(driver);
 470
 471         if (typename) {
 472             driver = typename;
 473             oc = object_class_by_name(driver);
 474         }
 475     }
 476
 477     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 478         qerror_report(ERROR_CLASS_GENERIC_ERROR,
 479                       "'%s' is not a valid device model name", driver);
 480         return NULL;
 481     }
 482
 483     if (object_class_is_abstract(oc)) {
 484         qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver",
 485                       "non-abstract device type");
 486         return NULL;
 487     }
 488
 489     dc = DEVICE_CLASS(oc);
 490     if (dc->cannot_instantiate_with_device_add_yet) {
 491         qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver",
 492                       "pluggable device type");
 493         return NULL;
 494     }
 495
 496     /* find bus */
 497     path = qemu_opt_get(opts, "bus");
 498     if (path != NULL) {
 499         bus = qbus_find(path);
 500         if (!bus) {
 501             return NULL;
 502         }
 503         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 504             qerror_report(ERROR_CLASS_GENERIC_ERROR,
 505                           "Device '%s' can't go on a %s bus",
 506                           driver, object_get_typename(OBJECT(bus)));
 507             return NULL;
 508         }
 509     } else if (dc->bus_type != NULL) {
 510         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 511         if (!bus) {
 512             qerror_report(ERROR_CLASS_GENERIC_ERROR,
 513                           "No '%s' bus found for device '%s'",
 514                           dc->bus_type, driver);
 515             return NULL;
 516         }
 517     }
 518     if (qdev_hotplug && bus && !bus->allow_hotplug) {
 519         qerror_report(QERR_BUS_NO_HOTPLUG, bus->name);
 520         return NULL;
 521     }
 522
 523     /* create device */
 524     dev = DEVICE(object_new(driver));
 525
 526     if (bus) {
 527         qdev_set_parent_bus(dev, bus);
 528     }
 529
 530     id = qemu_opts_id(opts);
 531     if (id) {
 532         dev->id = id;
 533     }
 534
 535     if (dev->id) {
 536         object_property_add_child(qdev_get_peripheral(), dev->id,
 537                                   OBJECT(dev), NULL);
 538     } else {
 539         static int anon_count;
 540         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 541         object_property_add_child(qdev_get_peripheral_anon(), name,
 542                                   OBJECT(dev), NULL);
 543         g_free(name);
 544     }
 545
 546     /* set properties */
 547     if (qemu_opt_foreach(opts, set_property, dev, 1) != 0) {
 548         object_unparent(OBJECT(dev));
 549         object_unref(OBJECT(dev));
 550         return NULL;
 551     }
 552
 553     dev->opts = opts;
 554     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 555     if (err != NULL) {
 556         qerror_report_err(err);
 557         error_free(err);
 558         dev->opts = NULL;
 559         object_unparent(OBJECT(dev));
 560         object_unref(OBJECT(dev));
 561         qerror_report(QERR_DEVICE_INIT_FAILED, driver);
 562         return NULL;
 563     }
 564     return dev;
 565 }
 566
 567
 568 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 569 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 570
 571 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 572                              int indent)
 573 {
 574     if (!props)
 575         return;
 576     for (; props->name; props++) {
 577         Error *err = NULL;
 578         char *value;
 579         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 580         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 581             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 582         } else {
 583             value = object_property_print(OBJECT(dev), props->name, true, &err);
 584         }
 585         g_free(legacy_name);
 586
 587         if (err) {
 588             error_free(err);
 589             continue;
 590         }
 591         qdev_printf("%s = %s\n", props->name,
 592                     value && *value ? value : "<null>");
 593         g_free(value);
 594     }
 595 }
 596
 597 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 598 {
 599     BusClass *bc = BUS_GET_CLASS(bus);
 600
 601     if (bc->print_dev) {
 602         bc->print_dev(mon, dev, indent);
 603     }
 604 }
 605
 606 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 607 {
 608     ObjectClass *class;
 609     BusState *child;
 610     NamedGPIOList *ngl;
 611
 612     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 613                 dev->id ? dev->id : "");
 614     indent += 2;
 615     QLIST_FOREACH(ngl, &dev->gpios, node) {
 616         if (ngl->num_in) {
 617             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 618                         ngl->num_in);
 619         }
 620         if (ngl->num_out) {
 621             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 622                         ngl->num_out);
 623         }
 624     }
 625     class = object_get_class(OBJECT(dev));
 626     do {
 627         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 628         class = object_class_get_parent(class);
 629     } while (class != object_class_by_name(TYPE_DEVICE));
 630     bus_print_dev(dev->parent_bus, mon, dev, indent);
 631     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 632         qbus_print(mon, child, indent);
 633     }
 634 }
 635
 636 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 637 {
 638     BusChild *kid;
 639
 640     qdev_printf("bus: %s\n", bus->name);
 641     indent += 2;
 642     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 643     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 644         DeviceState *dev = kid->child;
 645         qdev_print(mon, dev, indent);
 646     }
 647 }
 648 #undef qdev_printf
 649
 650 void do_info_qtree(Monitor *mon, const QDict *qdict)
 651 {
 652     if (sysbus_get_default())
 653         qbus_print(mon, sysbus_get_default(), 0);
 654 }
 655
 656 void do_info_qdm(Monitor *mon, const QDict *qdict)
 657 {
 658     qdev_print_devinfos(true);
 659 }
 660
 661 int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
 662 {
 663     Error *local_err = NULL;
 664     QemuOpts *opts;
 665     DeviceState *dev;
 666
 667     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 668     if (local_err) {
 669         qerror_report_err(local_err);
 670         error_free(local_err);
 671         return -1;
 672     }
 673     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 674         qemu_opts_del(opts);
 675         return 0;
 676     }
 677     dev = qdev_device_add(opts);
 678     if (!dev) {
 679         qemu_opts_del(opts);
 680         return -1;
 681     }
 682     object_unref(OBJECT(dev));
 683     return 0;
 684 }
 685
 686 void qmp_device_del(const char *id, Error **errp)
 687 {
 688     DeviceState *dev;
 689
 690     dev = qdev_find_recursive(sysbus_get_default(), id);
 691     if (!dev) {
 692         error_set(errp, QERR_DEVICE_NOT_FOUND, id);
 693         return;
 694     }
 695
 696     qdev_unplug(dev, errp);
 697 }
 698
 699 void qdev_machine_init(void)
 700 {
 701     qdev_get_peripheral_anon();
 702     qdev_get_peripheral();
 703 }
 704
 705 QemuOptsList qemu_device_opts = {
 706     .name = "device",
 707     .implied_opt_name = "driver",
 708     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 709     .desc = {
 710         /*
 711          * no elements => accept any
 712          * sanity checking will happen later
 713          * when setting device properties
 714          */
 715         { /* end of list */ }
 716     },
 717 };
 718
 719 QemuOptsList qemu_global_opts = {
 720     .name = "global",
 721     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 722     .desc = {
 723         {
 724             .name = "driver",
 725             .type = QEMU_OPT_STRING,
 726         },{
 727             .name = "property",
 728             .type = QEMU_OPT_STRING,
 729         },{
 730             .name = "value",
 731             .type = QEMU_OPT_STRING,
 732         },
 733         { /* end of list */ }
 734     },
 735 };
 736
 737 int qemu_global_option(const char *str)
 738 {
 739     char driver[64], property[64];
 740     QemuOpts *opts;
 741     int rc, offset;
 742
 743     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 744     if (rc < 2 || str[offset] != '=') {
 745         error_report("can't parse: \"%s\"", str);
 746         return -1;
 747     }
 748
 749     opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 750     qemu_opt_set(opts, "driver", driver);
 751     qemu_opt_set(opts, "property", property);
 752     qemu_opt_set(opts, "value", str+offset+1);
 753     return 0;
 754 }