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 (local_err) {
 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", driver,
 217                      prop->value->name,
 218                      prop->value->type);
 219         if (prop->value->has_description) {
 220             error_printf(" (%s)\n", prop->value->description);
 221         } else {
 222             error_printf("\n");
 223         }
 224     }
 225
 226     qapi_free_DevicePropertyInfoList(prop_list);
 227     return 1;
 228 }
 229
 230 static Object *qdev_get_peripheral(void)
 231 {
 232     static Object *dev;
 233
 234     if (dev == NULL) {
 235         dev = container_get(qdev_get_machine(), "/peripheral");
 236     }
 237
 238     return dev;
 239 }
 240
 241 static Object *qdev_get_peripheral_anon(void)
 242 {
 243     static Object *dev;
 244
 245     if (dev == NULL) {
 246         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 247     }
 248
 249     return dev;
 250 }
 251
 252 static void qbus_list_bus(DeviceState *dev)
 253 {
 254     BusState *child;
 255     const char *sep = " ";
 256
 257     error_printf("child busses at \"%s\":",
 258                  dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 259     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 260         error_printf("%s\"%s\"", sep, child->name);
 261         sep = ", ";
 262     }
 263     error_printf("\n");
 264 }
 265
 266 static void qbus_list_dev(BusState *bus)
 267 {
 268     BusChild *kid;
 269     const char *sep = " ";
 270
 271     error_printf("devices at \"%s\":", bus->name);
 272     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 273         DeviceState *dev = kid->child;
 274         error_printf("%s\"%s\"", sep, object_get_typename(OBJECT(dev)));
 275         if (dev->id)
 276             error_printf("/\"%s\"", dev->id);
 277         sep = ", ";
 278     }
 279     error_printf("\n");
 280 }
 281
 282 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 283 {
 284     BusState *child;
 285
 286     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 287         if (strcmp(child->name, elem) == 0) {
 288             return child;
 289         }
 290     }
 291     return NULL;
 292 }
 293
 294 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 295 {
 296     BusChild *kid;
 297
 298     /*
 299      * try to match in order:
 300      *   (1) instance id, if present
 301      *   (2) driver name
 302      *   (3) driver alias, if present
 303      */
 304     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 305         DeviceState *dev = kid->child;
 306         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 307             return dev;
 308         }
 309     }
 310     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 311         DeviceState *dev = kid->child;
 312         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 313             return dev;
 314         }
 315     }
 316     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 317         DeviceState *dev = kid->child;
 318         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 319
 320         if (qdev_class_has_alias(dc) &&
 321             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 322             return dev;
 323         }
 324     }
 325     return NULL;
 326 }
 327
 328 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 329                                      const char *bus_typename)
 330 {
 331     BusClass *bus_class = BUS_GET_CLASS(bus);
 332     BusChild *kid;
 333     BusState *child, *ret;
 334     int match = 1;
 335
 336     if (name && (strcmp(bus->name, name) != 0)) {
 337         match = 0;
 338     } else if (bus_typename && !object_dynamic_cast(OBJECT(bus), bus_typename)) {
 339         match = 0;
 340     } else if ((bus_class->max_dev != 0) && (bus_class->max_dev <= bus->max_index)) {
 341         if (name != NULL) {
 342             /* bus was explicitly specified: return an error. */
 343             qerror_report(ERROR_CLASS_GENERIC_ERROR, "Bus '%s' is full",
 344                           bus->name);
 345             return NULL;
 346         } else {
 347             /* bus was not specified: try to find another one. */
 348             match = 0;
 349         }
 350     }
 351     if (match) {
 352         return bus;
 353     }
 354
 355     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 356         DeviceState *dev = kid->child;
 357         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 358             ret = qbus_find_recursive(child, name, bus_typename);
 359             if (ret) {
 360                 return ret;
 361             }
 362         }
 363     }
 364     return NULL;
 365 }
 366
 367 static BusState *qbus_find(const char *path)
 368 {
 369     DeviceState *dev;
 370     BusState *bus;
 371     char elem[128];
 372     int pos, len;
 373
 374     /* find start element */
 375     if (path[0] == '/') {
 376         bus = sysbus_get_default();
 377         pos = 0;
 378     } else {
 379         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 380             assert(!path[0]);
 381             elem[0] = len = 0;
 382         }
 383         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 384         if (!bus) {
 385             qerror_report(QERR_BUS_NOT_FOUND, elem);
 386             return NULL;
 387         }
 388         pos = len;
 389     }
 390
 391     for (;;) {
 392         assert(path[pos] == '/' || !path[pos]);
 393         while (path[pos] == '/') {
 394             pos++;
 395         }
 396         if (path[pos] == '\0') {
 397             return bus;
 398         }
 399
 400         /* find device */
 401         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 402             g_assert_not_reached();
 403             elem[0] = len = 0;
 404         }
 405         pos += len;
 406         dev = qbus_find_dev(bus, elem);
 407         if (!dev) {
 408             qerror_report(QERR_DEVICE_NOT_FOUND, elem);
 409             if (!monitor_cur_is_qmp()) {
 410                 qbus_list_dev(bus);
 411             }
 412             return NULL;
 413         }
 414
 415         assert(path[pos] == '/' || !path[pos]);
 416         while (path[pos] == '/') {
 417             pos++;
 418         }
 419         if (path[pos] == '\0') {
 420             /* last specified element is a device.  If it has exactly
 421              * one child bus accept it nevertheless */
 422             switch (dev->num_child_bus) {
 423             case 0:
 424                 qerror_report(ERROR_CLASS_GENERIC_ERROR,
 425                               "Device '%s' has no child bus", elem);
 426                 return NULL;
 427             case 1:
 428                 return QLIST_FIRST(&dev->child_bus);
 429             default:
 430                 qerror_report(ERROR_CLASS_GENERIC_ERROR,
 431                               "Device '%s' has multiple child busses", elem);
 432                 if (!monitor_cur_is_qmp()) {
 433                     qbus_list_bus(dev);
 434                 }
 435                 return NULL;
 436             }
 437         }
 438
 439         /* find bus */
 440         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 441             g_assert_not_reached();
 442             elem[0] = len = 0;
 443         }
 444         pos += len;
 445         bus = qbus_find_bus(dev, elem);
 446         if (!bus) {
 447             qerror_report(QERR_BUS_NOT_FOUND, elem);
 448             if (!monitor_cur_is_qmp()) {
 449                 qbus_list_bus(dev);
 450             }
 451             return NULL;
 452         }
 453     }
 454 }
 455
 456 DeviceState *qdev_device_add(QemuOpts *opts)
 457 {
 458     ObjectClass *oc;
 459     DeviceClass *dc;
 460     const char *driver, *path, *id;
 461     DeviceState *dev;
 462     BusState *bus = NULL;
 463     Error *err = NULL;
 464
 465     driver = qemu_opt_get(opts, "driver");
 466     if (!driver) {
 467         qerror_report(QERR_MISSING_PARAMETER, "driver");
 468         return NULL;
 469     }
 470
 471     /* find driver */
 472     oc = object_class_by_name(driver);
 473     if (!oc) {
 474         const char *typename = find_typename_by_alias(driver);
 475
 476         if (typename) {
 477             driver = typename;
 478             oc = object_class_by_name(driver);
 479         }
 480     }
 481
 482     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 483         qerror_report(ERROR_CLASS_GENERIC_ERROR,
 484                       "'%s' is not a valid device model name", driver);
 485         return NULL;
 486     }
 487
 488     if (object_class_is_abstract(oc)) {
 489         qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver",
 490                       "non-abstract device type");
 491         return NULL;
 492     }
 493
 494     dc = DEVICE_CLASS(oc);
 495     if (dc->cannot_instantiate_with_device_add_yet ||
 496         (qdev_hotplug && !dc->hotpluggable)) {
 497         qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver",
 498                       "pluggable device type");
 499         return NULL;
 500     }
 501
 502     /* find bus */
 503     path = qemu_opt_get(opts, "bus");
 504     if (path != NULL) {
 505         bus = qbus_find(path);
 506         if (!bus) {
 507             return NULL;
 508         }
 509         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 510             qerror_report(ERROR_CLASS_GENERIC_ERROR,
 511                           "Device '%s' can't go on a %s bus",
 512                           driver, object_get_typename(OBJECT(bus)));
 513             return NULL;
 514         }
 515     } else if (dc->bus_type != NULL) {
 516         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 517         if (!bus) {
 518             qerror_report(ERROR_CLASS_GENERIC_ERROR,
 519                           "No '%s' bus found for device '%s'",
 520                           dc->bus_type, driver);
 521             return NULL;
 522         }
 523     }
 524     if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
 525         qerror_report(QERR_BUS_NO_HOTPLUG, bus->name);
 526         return NULL;
 527     }
 528
 529     /* create device */
 530     dev = DEVICE(object_new(driver));
 531
 532     if (bus) {
 533         qdev_set_parent_bus(dev, bus);
 534     }
 535
 536     id = qemu_opts_id(opts);
 537     if (id) {
 538         dev->id = id;
 539     }
 540
 541     if (dev->id) {
 542         object_property_add_child(qdev_get_peripheral(), dev->id,
 543                                   OBJECT(dev), NULL);
 544     } else {
 545         static int anon_count;
 546         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 547         object_property_add_child(qdev_get_peripheral_anon(), name,
 548                                   OBJECT(dev), NULL);
 549         g_free(name);
 550     }
 551
 552     /* set properties */
 553     if (qemu_opt_foreach(opts, set_property, dev, 1) != 0) {
 554         object_unparent(OBJECT(dev));
 555         object_unref(OBJECT(dev));
 556         return NULL;
 557     }
 558
 559     dev->opts = opts;
 560     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 561     if (err != NULL) {
 562         qerror_report_err(err);
 563         error_free(err);
 564         dev->opts = NULL;
 565         object_unparent(OBJECT(dev));
 566         object_unref(OBJECT(dev));
 567         qerror_report(QERR_DEVICE_INIT_FAILED, driver);
 568         return NULL;
 569     }
 570     return dev;
 571 }
 572
 573
 574 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 575 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 576
 577 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 578                              int indent)
 579 {
 580     if (!props)
 581         return;
 582     for (; props->name; props++) {
 583         Error *err = NULL;
 584         char *value;
 585         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 586         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 587             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 588         } else {
 589             value = object_property_print(OBJECT(dev), props->name, true, &err);
 590         }
 591         g_free(legacy_name);
 592
 593         if (err) {
 594             error_free(err);
 595             continue;
 596         }
 597         qdev_printf("%s = %s\n", props->name,
 598                     value && *value ? value : "<null>");
 599         g_free(value);
 600     }
 601 }
 602
 603 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 604 {
 605     BusClass *bc = BUS_GET_CLASS(bus);
 606
 607     if (bc->print_dev) {
 608         bc->print_dev(mon, dev, indent);
 609     }
 610 }
 611
 612 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 613 {
 614     ObjectClass *class;
 615     BusState *child;
 616     NamedGPIOList *ngl;
 617
 618     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 619                 dev->id ? dev->id : "");
 620     indent += 2;
 621     QLIST_FOREACH(ngl, &dev->gpios, node) {
 622         if (ngl->num_in) {
 623             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 624                         ngl->num_in);
 625         }
 626         if (ngl->num_out) {
 627             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 628                         ngl->num_out);
 629         }
 630     }
 631     class = object_get_class(OBJECT(dev));
 632     do {
 633         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 634         class = object_class_get_parent(class);
 635     } while (class != object_class_by_name(TYPE_DEVICE));
 636     bus_print_dev(dev->parent_bus, mon, dev, indent);
 637     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 638         qbus_print(mon, child, indent);
 639     }
 640 }
 641
 642 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 643 {
 644     BusChild *kid;
 645
 646     qdev_printf("bus: %s\n", bus->name);
 647     indent += 2;
 648     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 649     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 650         DeviceState *dev = kid->child;
 651         qdev_print(mon, dev, indent);
 652     }
 653 }
 654 #undef qdev_printf
 655
 656 void do_info_qtree(Monitor *mon, const QDict *qdict)
 657 {
 658     if (sysbus_get_default())
 659         qbus_print(mon, sysbus_get_default(), 0);
 660 }
 661
 662 void do_info_qdm(Monitor *mon, const QDict *qdict)
 663 {
 664     qdev_print_devinfos(true);
 665 }
 666
 667 int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
 668 {
 669     Error *local_err = NULL;
 670     QemuOpts *opts;
 671     DeviceState *dev;
 672
 673     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 674     if (local_err) {
 675         qerror_report_err(local_err);
 676         error_free(local_err);
 677         return -1;
 678     }
 679     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 680         qemu_opts_del(opts);
 681         return 0;
 682     }
 683     dev = qdev_device_add(opts);
 684     if (!dev) {
 685         qemu_opts_del(opts);
 686         return -1;
 687     }
 688     object_unref(OBJECT(dev));
 689     return 0;
 690 }
 691
 692 void qmp_device_del(const char *id, Error **errp)
 693 {
 694     Object *obj;
 695     char *root_path = object_get_canonical_path(qdev_get_peripheral());
 696     char *path = g_strdup_printf("%s/%s", root_path, id);
 697
 698     g_free(root_path);
 699     obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 700     g_free(path);
 701
 702     if (!obj) {
 703         error_set(errp, QERR_DEVICE_NOT_FOUND, id);
 704         return;
 705     }
 706
 707     qdev_unplug(DEVICE(obj), errp);
 708 }
 709
 710 void qdev_machine_init(void)
 711 {
 712     qdev_get_peripheral_anon();
 713     qdev_get_peripheral();
 714 }
 715
 716 QemuOptsList qemu_device_opts = {
 717     .name = "device",
 718     .implied_opt_name = "driver",
 719     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 720     .desc = {
 721         /*
 722          * no elements => accept any
 723          * sanity checking will happen later
 724          * when setting device properties
 725          */
 726         { /* end of list */ }
 727     },
 728 };
 729
 730 QemuOptsList qemu_global_opts = {
 731     .name = "global",
 732     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 733     .desc = {
 734         {
 735             .name = "driver",
 736             .type = QEMU_OPT_STRING,
 737         },{
 738             .name = "property",
 739             .type = QEMU_OPT_STRING,
 740         },{
 741             .name = "value",
 742             .type = QEMU_OPT_STRING,
 743         },
 744         { /* end of list */ }
 745     },
 746 };
 747
 748 int qemu_global_option(const char *str)
 749 {
 750     char driver[64], property[64];
 751     QemuOpts *opts;
 752     int rc, offset;
 753
 754     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 755     if (rc < 2 || str[offset] != '=') {
 756         error_report("can't parse: \"%s\"", str);
 757         return -1;
 758     }
 759
 760     opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 761     qemu_opt_set(opts, "driver", driver);
 762     qemu_opt_set(opts, "property", property);
 763     qemu_opt_set(opts, "value", str+offset+1);
 764     return 0;
 765 }