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 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 184 {
 185     ObjectClass *oc;
 186     DeviceClass *dc;
 187
 188     oc = object_class_by_name(*driver);
 189     if (!oc) {
 190         const char *typename = find_typename_by_alias(*driver);
 191
 192         if (typename) {
 193             *driver = typename;
 194             oc = object_class_by_name(*driver);
 195         }
 196     }
 197
 198     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 199         error_setg(errp, "'%s' is not a valid device model name", *driver);
 200         return NULL;
 201     }
 202
 203     if (object_class_is_abstract(oc)) {
 204         error_set(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 205                   "non-abstract device type");
 206         return NULL;
 207     }
 208
 209     dc = DEVICE_CLASS(oc);
 210     if (dc->cannot_instantiate_with_device_add_yet ||
 211         (qdev_hotplug && !dc->hotpluggable)) {
 212         error_set(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 213                   "pluggable device type");
 214         return NULL;
 215     }
 216
 217     return dc;
 218 }
 219
 220
 221 int qdev_device_help(QemuOpts *opts)
 222 {
 223     Error *local_err = NULL;
 224     const char *driver;
 225     DevicePropertyInfoList *prop_list;
 226     DevicePropertyInfoList *prop;
 227
 228     driver = qemu_opt_get(opts, "driver");
 229     if (driver && is_help_option(driver)) {
 230         qdev_print_devinfos(false);
 231         return 1;
 232     }
 233
 234     if (!driver || !qemu_opt_has_help_opt(opts)) {
 235         return 0;
 236     }
 237
 238     if (!object_class_by_name(driver)) {
 239         const char *typename = find_typename_by_alias(driver);
 240
 241         if (typename) {
 242             driver = typename;
 243         }
 244     }
 245
 246     prop_list = qmp_device_list_properties(driver, &local_err);
 247     if (local_err) {
 248         goto error;
 249     }
 250
 251     for (prop = prop_list; prop; prop = prop->next) {
 252         error_printf("%s.%s=%s", driver,
 253                      prop->value->name,
 254                      prop->value->type);
 255         if (prop->value->has_description) {
 256             error_printf(" (%s)\n", prop->value->description);
 257         } else {
 258             error_printf("\n");
 259         }
 260     }
 261
 262     qapi_free_DevicePropertyInfoList(prop_list);
 263     return 1;
 264
 265 error:
 266     error_printf("%s\n", error_get_pretty(local_err));
 267     error_free(local_err);
 268     return 1;
 269 }
 270
 271 static Object *qdev_get_peripheral(void)
 272 {
 273     static Object *dev;
 274
 275     if (dev == NULL) {
 276         dev = container_get(qdev_get_machine(), "/peripheral");
 277     }
 278
 279     return dev;
 280 }
 281
 282 static Object *qdev_get_peripheral_anon(void)
 283 {
 284     static Object *dev;
 285
 286     if (dev == NULL) {
 287         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 288     }
 289
 290     return dev;
 291 }
 292
 293 static void qbus_list_bus(DeviceState *dev)
 294 {
 295     BusState *child;
 296     const char *sep = " ";
 297
 298     error_printf("child busses at \"%s\":",
 299                  dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 300     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 301         error_printf("%s\"%s\"", sep, child->name);
 302         sep = ", ";
 303     }
 304     error_printf("\n");
 305 }
 306
 307 static void qbus_list_dev(BusState *bus)
 308 {
 309     BusChild *kid;
 310     const char *sep = " ";
 311
 312     error_printf("devices at \"%s\":", bus->name);
 313     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 314         DeviceState *dev = kid->child;
 315         error_printf("%s\"%s\"", sep, object_get_typename(OBJECT(dev)));
 316         if (dev->id)
 317             error_printf("/\"%s\"", dev->id);
 318         sep = ", ";
 319     }
 320     error_printf("\n");
 321 }
 322
 323 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 324 {
 325     BusState *child;
 326
 327     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 328         if (strcmp(child->name, elem) == 0) {
 329             return child;
 330         }
 331     }
 332     return NULL;
 333 }
 334
 335 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 336 {
 337     BusChild *kid;
 338
 339     /*
 340      * try to match in order:
 341      *   (1) instance id, if present
 342      *   (2) driver name
 343      *   (3) driver alias, if present
 344      */
 345     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 346         DeviceState *dev = kid->child;
 347         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 348             return dev;
 349         }
 350     }
 351     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 352         DeviceState *dev = kid->child;
 353         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 354             return dev;
 355         }
 356     }
 357     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 358         DeviceState *dev = kid->child;
 359         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 360
 361         if (qdev_class_has_alias(dc) &&
 362             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 363             return dev;
 364         }
 365     }
 366     return NULL;
 367 }
 368
 369 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 370                                      const char *bus_typename)
 371 {
 372     BusClass *bus_class = BUS_GET_CLASS(bus);
 373     BusChild *kid;
 374     BusState *child, *ret;
 375     int match = 1;
 376
 377     if (name && (strcmp(bus->name, name) != 0)) {
 378         match = 0;
 379     } else if (bus_typename && !object_dynamic_cast(OBJECT(bus), bus_typename)) {
 380         match = 0;
 381     } else if ((bus_class->max_dev != 0) && (bus_class->max_dev <= bus->max_index)) {
 382         if (name != NULL) {
 383             /* bus was explicitly specified: return an error. */
 384             qerror_report(ERROR_CLASS_GENERIC_ERROR, "Bus '%s' is full",
 385                           bus->name);
 386             return NULL;
 387         } else {
 388             /* bus was not specified: try to find another one. */
 389             match = 0;
 390         }
 391     }
 392     if (match) {
 393         return bus;
 394     }
 395
 396     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 397         DeviceState *dev = kid->child;
 398         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 399             ret = qbus_find_recursive(child, name, bus_typename);
 400             if (ret) {
 401                 return ret;
 402             }
 403         }
 404     }
 405     return NULL;
 406 }
 407
 408 static BusState *qbus_find(const char *path)
 409 {
 410     DeviceState *dev;
 411     BusState *bus;
 412     char elem[128];
 413     int pos, len;
 414
 415     /* find start element */
 416     if (path[0] == '/') {
 417         bus = sysbus_get_default();
 418         pos = 0;
 419     } else {
 420         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 421             assert(!path[0]);
 422             elem[0] = len = 0;
 423         }
 424         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 425         if (!bus) {
 426             qerror_report(QERR_BUS_NOT_FOUND, elem);
 427             return NULL;
 428         }
 429         pos = len;
 430     }
 431
 432     for (;;) {
 433         assert(path[pos] == '/' || !path[pos]);
 434         while (path[pos] == '/') {
 435             pos++;
 436         }
 437         if (path[pos] == '\0') {
 438             return bus;
 439         }
 440
 441         /* find device */
 442         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 443             g_assert_not_reached();
 444             elem[0] = len = 0;
 445         }
 446         pos += len;
 447         dev = qbus_find_dev(bus, elem);
 448         if (!dev) {
 449             qerror_report(QERR_DEVICE_NOT_FOUND, elem);
 450             if (!monitor_cur_is_qmp()) {
 451                 qbus_list_dev(bus);
 452             }
 453             return NULL;
 454         }
 455
 456         assert(path[pos] == '/' || !path[pos]);
 457         while (path[pos] == '/') {
 458             pos++;
 459         }
 460         if (path[pos] == '\0') {
 461             /* last specified element is a device.  If it has exactly
 462              * one child bus accept it nevertheless */
 463             switch (dev->num_child_bus) {
 464             case 0:
 465                 qerror_report(ERROR_CLASS_GENERIC_ERROR,
 466                               "Device '%s' has no child bus", elem);
 467                 return NULL;
 468             case 1:
 469                 return QLIST_FIRST(&dev->child_bus);
 470             default:
 471                 qerror_report(ERROR_CLASS_GENERIC_ERROR,
 472                               "Device '%s' has multiple child busses", elem);
 473                 if (!monitor_cur_is_qmp()) {
 474                     qbus_list_bus(dev);
 475                 }
 476                 return NULL;
 477             }
 478         }
 479
 480         /* find bus */
 481         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 482             g_assert_not_reached();
 483             elem[0] = len = 0;
 484         }
 485         pos += len;
 486         bus = qbus_find_bus(dev, elem);
 487         if (!bus) {
 488             qerror_report(QERR_BUS_NOT_FOUND, elem);
 489             if (!monitor_cur_is_qmp()) {
 490                 qbus_list_bus(dev);
 491             }
 492             return NULL;
 493         }
 494     }
 495 }
 496
 497 DeviceState *qdev_device_add(QemuOpts *opts)
 498 {
 499     DeviceClass *dc;
 500     const char *driver, *path, *id;
 501     DeviceState *dev;
 502     BusState *bus = NULL;
 503     Error *err = NULL;
 504
 505     driver = qemu_opt_get(opts, "driver");
 506     if (!driver) {
 507         qerror_report(QERR_MISSING_PARAMETER, "driver");
 508         return NULL;
 509     }
 510
 511     /* find driver */
 512     dc = qdev_get_device_class(&driver, &err);
 513     if (err) {
 514         qerror_report_err(err);
 515         error_free(err);
 516         return NULL;
 517     }
 518
 519     /* find bus */
 520     path = qemu_opt_get(opts, "bus");
 521     if (path != NULL) {
 522         bus = qbus_find(path);
 523         if (!bus) {
 524             return NULL;
 525         }
 526         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 527             qerror_report(ERROR_CLASS_GENERIC_ERROR,
 528                           "Device '%s' can't go on a %s bus",
 529                           driver, object_get_typename(OBJECT(bus)));
 530             return NULL;
 531         }
 532     } else if (dc->bus_type != NULL) {
 533         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 534         if (!bus) {
 535             qerror_report(ERROR_CLASS_GENERIC_ERROR,
 536                           "No '%s' bus found for device '%s'",
 537                           dc->bus_type, driver);
 538             return NULL;
 539         }
 540     }
 541     if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
 542         qerror_report(QERR_BUS_NO_HOTPLUG, bus->name);
 543         return NULL;
 544     }
 545
 546     /* create device */
 547     dev = DEVICE(object_new(driver));
 548
 549     if (bus) {
 550         qdev_set_parent_bus(dev, bus);
 551     }
 552
 553     id = qemu_opts_id(opts);
 554     if (id) {
 555         dev->id = id;
 556     }
 557
 558     if (dev->id) {
 559         object_property_add_child(qdev_get_peripheral(), dev->id,
 560                                   OBJECT(dev), NULL);
 561     } else {
 562         static int anon_count;
 563         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 564         object_property_add_child(qdev_get_peripheral_anon(), name,
 565                                   OBJECT(dev), NULL);
 566         g_free(name);
 567     }
 568
 569     /* set properties */
 570     if (qemu_opt_foreach(opts, set_property, dev, 1) != 0) {
 571         object_unparent(OBJECT(dev));
 572         object_unref(OBJECT(dev));
 573         return NULL;
 574     }
 575
 576     dev->opts = opts;
 577     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 578     if (err != NULL) {
 579         qerror_report_err(err);
 580         error_free(err);
 581         dev->opts = NULL;
 582         object_unparent(OBJECT(dev));
 583         object_unref(OBJECT(dev));
 584         qerror_report(QERR_DEVICE_INIT_FAILED, driver);
 585         return NULL;
 586     }
 587     return dev;
 588 }
 589
 590
 591 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 592 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 593
 594 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 595                              int indent)
 596 {
 597     if (!props)
 598         return;
 599     for (; props->name; props++) {
 600         Error *err = NULL;
 601         char *value;
 602         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 603         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 604             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 605         } else {
 606             value = object_property_print(OBJECT(dev), props->name, true, &err);
 607         }
 608         g_free(legacy_name);
 609
 610         if (err) {
 611             error_free(err);
 612             continue;
 613         }
 614         qdev_printf("%s = %s\n", props->name,
 615                     value && *value ? value : "<null>");
 616         g_free(value);
 617     }
 618 }
 619
 620 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 621 {
 622     BusClass *bc = BUS_GET_CLASS(bus);
 623
 624     if (bc->print_dev) {
 625         bc->print_dev(mon, dev, indent);
 626     }
 627 }
 628
 629 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 630 {
 631     ObjectClass *class;
 632     BusState *child;
 633     NamedGPIOList *ngl;
 634
 635     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 636                 dev->id ? dev->id : "");
 637     indent += 2;
 638     QLIST_FOREACH(ngl, &dev->gpios, node) {
 639         if (ngl->num_in) {
 640             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 641                         ngl->num_in);
 642         }
 643         if (ngl->num_out) {
 644             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 645                         ngl->num_out);
 646         }
 647     }
 648     class = object_get_class(OBJECT(dev));
 649     do {
 650         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 651         class = object_class_get_parent(class);
 652     } while (class != object_class_by_name(TYPE_DEVICE));
 653     bus_print_dev(dev->parent_bus, mon, dev, indent);
 654     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 655         qbus_print(mon, child, indent);
 656     }
 657 }
 658
 659 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 660 {
 661     BusChild *kid;
 662
 663     qdev_printf("bus: %s\n", bus->name);
 664     indent += 2;
 665     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 666     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 667         DeviceState *dev = kid->child;
 668         qdev_print(mon, dev, indent);
 669     }
 670 }
 671 #undef qdev_printf
 672
 673 void do_info_qtree(Monitor *mon, const QDict *qdict)
 674 {
 675     if (sysbus_get_default())
 676         qbus_print(mon, sysbus_get_default(), 0);
 677 }
 678
 679 void do_info_qdm(Monitor *mon, const QDict *qdict)
 680 {
 681     qdev_print_devinfos(true);
 682 }
 683
 684 int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
 685 {
 686     Error *local_err = NULL;
 687     QemuOpts *opts;
 688     DeviceState *dev;
 689
 690     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 691     if (local_err) {
 692         qerror_report_err(local_err);
 693         error_free(local_err);
 694         return -1;
 695     }
 696     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 697         qemu_opts_del(opts);
 698         return 0;
 699     }
 700     dev = qdev_device_add(opts);
 701     if (!dev) {
 702         qemu_opts_del(opts);
 703         return -1;
 704     }
 705     object_unref(OBJECT(dev));
 706     return 0;
 707 }
 708
 709 void qmp_device_del(const char *id, Error **errp)
 710 {
 711     Object *obj;
 712     char *root_path = object_get_canonical_path(qdev_get_peripheral());
 713     char *path = g_strdup_printf("%s/%s", root_path, id);
 714
 715     g_free(root_path);
 716     obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 717     g_free(path);
 718
 719     if (!obj) {
 720         error_set(errp, QERR_DEVICE_NOT_FOUND, id);
 721         return;
 722     }
 723
 724     qdev_unplug(DEVICE(obj), errp);
 725 }
 726
 727 void qdev_machine_init(void)
 728 {
 729     qdev_get_peripheral_anon();
 730     qdev_get_peripheral();
 731 }
 732
 733 QemuOptsList qemu_device_opts = {
 734     .name = "device",
 735     .implied_opt_name = "driver",
 736     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 737     .desc = {
 738         /*
 739          * no elements => accept any
 740          * sanity checking will happen later
 741          * when setting device properties
 742          */
 743         { /* end of list */ }
 744     },
 745 };
 746
 747 QemuOptsList qemu_global_opts = {
 748     .name = "global",
 749     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 750     .desc = {
 751         {
 752             .name = "driver",
 753             .type = QEMU_OPT_STRING,
 754         },{
 755             .name = "property",
 756             .type = QEMU_OPT_STRING,
 757         },{
 758             .name = "value",
 759             .type = QEMU_OPT_STRING,
 760         },
 761         { /* end of list */ }
 762     },
 763 };
 764
 765 int qemu_global_option(const char *str)
 766 {
 767     char driver[64], property[64];
 768     QemuOpts *opts;
 769     int rc, offset;
 770
 771     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 772     if (rc < 2 || str[offset] != '=') {
 773         error_report("can't parse: \"%s\"", str);
 774         return -1;
 775     }
 776
 777     opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 778     qemu_opt_set(opts, "driver", driver);
 779     qemu_opt_set(opts, "property", property);
 780     qemu_opt_set(opts, "value", str+offset+1);
 781     return 0;
 782 }