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-ccw", "virtio-blk", QEMU_ARCH_S390X },
  46     { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
  47     { "virtio-serial-ccw", "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(void *opaque, const char *name, const char *value,
 147                         Error **errp)
 148 {
 149     Object *obj = opaque;
 150     Error *err = NULL;
 151
 152     if (strcmp(name, "driver") == 0)
 153         return 0;
 154     if (strcmp(name, "bus") == 0)
 155         return 0;
 156
 157     object_property_parse(obj, value, name, &err);
 158     if (err != NULL) {
 159         qerror_report_err(err);
 160         error_free(err);
 161         return -1;
 162     }
 163     return 0;
 164 }
 165
 166 static const char *find_typename_by_alias(const char *alias)
 167 {
 168     int i;
 169
 170     for (i = 0; qdev_alias_table[i].alias; i++) {
 171         if (qdev_alias_table[i].arch_mask &&
 172             !(qdev_alias_table[i].arch_mask & arch_type)) {
 173             continue;
 174         }
 175
 176         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 177             return qdev_alias_table[i].typename;
 178         }
 179     }
 180
 181     return NULL;
 182 }
 183
 184 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 185 {
 186     ObjectClass *oc;
 187     DeviceClass *dc;
 188
 189     oc = object_class_by_name(*driver);
 190     if (!oc) {
 191         const char *typename = find_typename_by_alias(*driver);
 192
 193         if (typename) {
 194             *driver = typename;
 195             oc = object_class_by_name(*driver);
 196         }
 197     }
 198
 199     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 200         error_setg(errp, "'%s' is not a valid device model name", *driver);
 201         return NULL;
 202     }
 203
 204     if (object_class_is_abstract(oc)) {
 205         error_set(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 206                   "non-abstract device type");
 207         return NULL;
 208     }
 209
 210     dc = DEVICE_CLASS(oc);
 211     if (dc->cannot_instantiate_with_device_add_yet ||
 212         (qdev_hotplug && !dc->hotpluggable)) {
 213         error_set(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 214                   "pluggable device type");
 215         return NULL;
 216     }
 217
 218     return dc;
 219 }
 220
 221
 222 int qdev_device_help(QemuOpts *opts)
 223 {
 224     Error *local_err = NULL;
 225     const char *driver;
 226     DevicePropertyInfoList *prop_list;
 227     DevicePropertyInfoList *prop;
 228
 229     driver = qemu_opt_get(opts, "driver");
 230     if (driver && is_help_option(driver)) {
 231         qdev_print_devinfos(false);
 232         return 1;
 233     }
 234
 235     if (!driver || !qemu_opt_has_help_opt(opts)) {
 236         return 0;
 237     }
 238
 239     qdev_get_device_class(&driver, &local_err);
 240     if (local_err) {
 241         goto error;
 242     }
 243
 244     prop_list = qmp_device_list_properties(driver, &local_err);
 245     if (local_err) {
 246         goto error;
 247     }
 248
 249     for (prop = prop_list; prop; prop = prop->next) {
 250         error_printf("%s.%s=%s", driver,
 251                      prop->value->name,
 252                      prop->value->type);
 253         if (prop->value->has_description) {
 254             error_printf(" (%s)\n", prop->value->description);
 255         } else {
 256             error_printf("\n");
 257         }
 258     }
 259
 260     qapi_free_DevicePropertyInfoList(prop_list);
 261     return 1;
 262
 263 error:
 264     error_printf("%s\n", error_get_pretty(local_err));
 265     error_free(local_err);
 266     return 1;
 267 }
 268
 269 static Object *qdev_get_peripheral(void)
 270 {
 271     static Object *dev;
 272
 273     if (dev == NULL) {
 274         dev = container_get(qdev_get_machine(), "/peripheral");
 275     }
 276
 277     return dev;
 278 }
 279
 280 static Object *qdev_get_peripheral_anon(void)
 281 {
 282     static Object *dev;
 283
 284     if (dev == NULL) {
 285         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 286     }
 287
 288     return dev;
 289 }
 290
 291 #if 0 /* conversion from qerror_report() to error_set() broke their use */
 292 static void qbus_list_bus(DeviceState *dev)
 293 {
 294     BusState *child;
 295     const char *sep = " ";
 296
 297     error_printf("child buses at \"%s\":",
 298                  dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 299     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 300         error_printf("%s\"%s\"", sep, child->name);
 301         sep = ", ";
 302     }
 303     error_printf("\n");
 304 }
 305
 306 static void qbus_list_dev(BusState *bus)
 307 {
 308     BusChild *kid;
 309     const char *sep = " ";
 310
 311     error_printf("devices at \"%s\":", bus->name);
 312     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 313         DeviceState *dev = kid->child;
 314         error_printf("%s\"%s\"", sep, object_get_typename(OBJECT(dev)));
 315         if (dev->id)
 316             error_printf("/\"%s\"", dev->id);
 317         sep = ", ";
 318     }
 319     error_printf("\n");
 320 }
 321 #endif
 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 inline bool qbus_is_full(BusState *bus)
 370 {
 371     BusClass *bus_class = BUS_GET_CLASS(bus);
 372     return bus_class->max_dev && bus->max_index >= bus_class->max_dev;
 373 }
 374
 375 /*
 376  * Search the tree rooted at @bus for a bus.
 377  * If @name, search for a bus with that name.  Note that bus names
 378  * need not be unique.  Yes, that's screwed up.
 379  * Else search for a bus that is a subtype of @bus_typename.
 380  * If more than one exists, prefer one that can take another device.
 381  * Return the bus if found, else %NULL.
 382  */
 383 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 384                                      const char *bus_typename)
 385 {
 386     BusChild *kid;
 387     BusState *pick, *child, *ret;
 388     bool match;
 389
 390     assert(name || bus_typename);
 391     if (name) {
 392         match = !strcmp(bus->name, name);
 393     } else {
 394         match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
 395     }
 396
 397     if (match && !qbus_is_full(bus)) {
 398         return bus;             /* root matches and isn't full */
 399     }
 400
 401     pick = match ? bus : NULL;
 402
 403     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 404         DeviceState *dev = kid->child;
 405         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 406             ret = qbus_find_recursive(child, name, bus_typename);
 407             if (ret && !qbus_is_full(ret)) {
 408                 return ret;     /* a descendant matches and isn't full */
 409             }
 410             if (ret && !pick) {
 411                 pick = ret;
 412             }
 413         }
 414     }
 415
 416     /* root or a descendant matches, but is full */
 417     return pick;
 418 }
 419
 420 static BusState *qbus_find(const char *path, Error **errp)
 421 {
 422     DeviceState *dev;
 423     BusState *bus;
 424     char elem[128];
 425     int pos, len;
 426
 427     /* find start element */
 428     if (path[0] == '/') {
 429         bus = sysbus_get_default();
 430         pos = 0;
 431     } else {
 432         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 433             assert(!path[0]);
 434             elem[0] = len = 0;
 435         }
 436         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 437         if (!bus) {
 438             error_setg(errp, "Bus '%s' not found", elem);
 439             return NULL;
 440         }
 441         pos = len;
 442     }
 443
 444     for (;;) {
 445         assert(path[pos] == '/' || !path[pos]);
 446         while (path[pos] == '/') {
 447             pos++;
 448         }
 449         if (path[pos] == '\0') {
 450             break;
 451         }
 452
 453         /* find device */
 454         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 455             g_assert_not_reached();
 456             elem[0] = len = 0;
 457         }
 458         pos += len;
 459         dev = qbus_find_dev(bus, elem);
 460         if (!dev) {
 461             error_set(errp, QERR_DEVICE_NOT_FOUND, elem);
 462 #if 0 /* conversion from qerror_report() to error_set() broke this: */
 463             if (!monitor_cur_is_qmp()) {
 464                 qbus_list_dev(bus);
 465             }
 466 #endif
 467             return NULL;
 468         }
 469
 470         assert(path[pos] == '/' || !path[pos]);
 471         while (path[pos] == '/') {
 472             pos++;
 473         }
 474         if (path[pos] == '\0') {
 475             /* last specified element is a device.  If it has exactly
 476              * one child bus accept it nevertheless */
 477             if (dev->num_child_bus == 1) {
 478                 bus = QLIST_FIRST(&dev->child_bus);
 479                 break;
 480             }
 481             if (dev->num_child_bus) {
 482                 error_setg(errp, "Device '%s' has multiple child buses",
 483                            elem);
 484 #if 0 /* conversion from qerror_report() to error_set() broke this: */
 485                 if (!monitor_cur_is_qmp()) {
 486                     qbus_list_bus(dev);
 487                 }
 488 #endif
 489             } else {
 490                 error_setg(errp, "Device '%s' has no child bus", elem);
 491             }
 492             return NULL;
 493         }
 494
 495         /* find bus */
 496         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 497             g_assert_not_reached();
 498             elem[0] = len = 0;
 499         }
 500         pos += len;
 501         bus = qbus_find_bus(dev, elem);
 502         if (!bus) {
 503             error_setg(errp, "Bus '%s' not found", elem);
 504 #if 0 /* conversion from qerror_report() to error_set() broke this: */
 505             if (!monitor_cur_is_qmp()) {
 506                 qbus_list_bus(dev);
 507             }
 508 #endif
 509             return NULL;
 510         }
 511     }
 512
 513     if (qbus_is_full(bus)) {
 514         error_setg(errp, "Bus '%s' is full", path);
 515         return NULL;
 516     }
 517     return bus;
 518 }
 519
 520 DeviceState *qdev_device_add(QemuOpts *opts)
 521 {
 522     DeviceClass *dc;
 523     const char *driver, *path, *id;
 524     DeviceState *dev;
 525     BusState *bus = NULL;
 526     Error *err = NULL;
 527
 528     driver = qemu_opt_get(opts, "driver");
 529     if (!driver) {
 530         qerror_report(QERR_MISSING_PARAMETER, "driver");
 531         return NULL;
 532     }
 533
 534     /* find driver */
 535     dc = qdev_get_device_class(&driver, &err);
 536     if (err) {
 537         qerror_report_err(err);
 538         error_free(err);
 539         return NULL;
 540     }
 541
 542     /* find bus */
 543     path = qemu_opt_get(opts, "bus");
 544     if (path != NULL) {
 545         bus = qbus_find(path, &err);
 546         if (!bus) {
 547             qerror_report_err(err);
 548             error_free(err);
 549             return NULL;
 550         }
 551         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 552             qerror_report(ERROR_CLASS_GENERIC_ERROR,
 553                           "Device '%s' can't go on a %s bus",
 554                           driver, object_get_typename(OBJECT(bus)));
 555             return NULL;
 556         }
 557     } else if (dc->bus_type != NULL) {
 558         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 559         if (!bus || qbus_is_full(bus)) {
 560             qerror_report(ERROR_CLASS_GENERIC_ERROR,
 561                           "No '%s' bus found for device '%s'",
 562                           dc->bus_type, driver);
 563             return NULL;
 564         }
 565     }
 566     if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
 567         qerror_report(QERR_BUS_NO_HOTPLUG, bus->name);
 568         return NULL;
 569     }
 570
 571     /* create device */
 572     dev = DEVICE(object_new(driver));
 573
 574     if (bus) {
 575         qdev_set_parent_bus(dev, bus);
 576     }
 577
 578     id = qemu_opts_id(opts);
 579     if (id) {
 580         dev->id = id;
 581     }
 582
 583     if (dev->id) {
 584         object_property_add_child(qdev_get_peripheral(), dev->id,
 585                                   OBJECT(dev), NULL);
 586     } else {
 587         static int anon_count;
 588         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 589         object_property_add_child(qdev_get_peripheral_anon(), name,
 590                                   OBJECT(dev), NULL);
 591         g_free(name);
 592     }
 593
 594     /* set properties */
 595     if (qemu_opt_foreach(opts, set_property, dev, NULL)) {
 596         object_unparent(OBJECT(dev));
 597         object_unref(OBJECT(dev));
 598         return NULL;
 599     }
 600
 601     dev->opts = opts;
 602     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 603     if (err != NULL) {
 604         qerror_report_err(err);
 605         error_free(err);
 606         dev->opts = NULL;
 607         object_unparent(OBJECT(dev));
 608         object_unref(OBJECT(dev));
 609         qerror_report(QERR_DEVICE_INIT_FAILED, driver);
 610         return NULL;
 611     }
 612     return dev;
 613 }
 614
 615
 616 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 617 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 618
 619 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 620                              int indent)
 621 {
 622     if (!props)
 623         return;
 624     for (; props->name; props++) {
 625         Error *err = NULL;
 626         char *value;
 627         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 628         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 629             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 630         } else {
 631             value = object_property_print(OBJECT(dev), props->name, true, &err);
 632         }
 633         g_free(legacy_name);
 634
 635         if (err) {
 636             error_free(err);
 637             continue;
 638         }
 639         qdev_printf("%s = %s\n", props->name,
 640                     value && *value ? value : "<null>");
 641         g_free(value);
 642     }
 643 }
 644
 645 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 646 {
 647     BusClass *bc = BUS_GET_CLASS(bus);
 648
 649     if (bc->print_dev) {
 650         bc->print_dev(mon, dev, indent);
 651     }
 652 }
 653
 654 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 655 {
 656     ObjectClass *class;
 657     BusState *child;
 658     NamedGPIOList *ngl;
 659
 660     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 661                 dev->id ? dev->id : "");
 662     indent += 2;
 663     QLIST_FOREACH(ngl, &dev->gpios, node) {
 664         if (ngl->num_in) {
 665             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 666                         ngl->num_in);
 667         }
 668         if (ngl->num_out) {
 669             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 670                         ngl->num_out);
 671         }
 672     }
 673     class = object_get_class(OBJECT(dev));
 674     do {
 675         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 676         class = object_class_get_parent(class);
 677     } while (class != object_class_by_name(TYPE_DEVICE));
 678     bus_print_dev(dev->parent_bus, mon, dev, indent);
 679     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 680         qbus_print(mon, child, indent);
 681     }
 682 }
 683
 684 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 685 {
 686     BusChild *kid;
 687
 688     qdev_printf("bus: %s\n", bus->name);
 689     indent += 2;
 690     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 691     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 692         DeviceState *dev = kid->child;
 693         qdev_print(mon, dev, indent);
 694     }
 695 }
 696 #undef qdev_printf
 697
 698 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
 699 {
 700     if (sysbus_get_default())
 701         qbus_print(mon, sysbus_get_default(), 0);
 702 }
 703
 704 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
 705 {
 706     qdev_print_devinfos(true);
 707 }
 708
 709 typedef struct QOMCompositionState {
 710     Monitor *mon;
 711     int indent;
 712 } QOMCompositionState;
 713
 714 static void print_qom_composition(Monitor *mon, Object *obj, int indent);
 715
 716 static int print_qom_composition_child(Object *obj, void *opaque)
 717 {
 718     QOMCompositionState *s = opaque;
 719
 720     print_qom_composition(s->mon, obj, s->indent);
 721
 722     return 0;
 723 }
 724
 725 static void print_qom_composition(Monitor *mon, Object *obj, int indent)
 726 {
 727     QOMCompositionState s = {
 728         .mon = mon,
 729         .indent = indent + 2,
 730     };
 731     char *name;
 732
 733     if (obj == object_get_root()) {
 734         name = g_strdup("");
 735     } else {
 736         name = object_get_canonical_path_component(obj);
 737     }
 738     monitor_printf(mon, "%*s/%s (%s)\n", indent, "", name,
 739                    object_get_typename(obj));
 740     g_free(name);
 741     object_child_foreach(obj, print_qom_composition_child, &s);
 742 }
 743
 744 void hmp_info_qom_tree(Monitor *mon, const QDict *dict)
 745 {
 746     const char *path = qdict_get_try_str(dict, "path");
 747     Object *obj;
 748     bool ambiguous = false;
 749
 750     if (path) {
 751         obj = object_resolve_path(path, &ambiguous);
 752         if (!obj) {
 753             monitor_printf(mon, "Path '%s' could not be resolved.\n", path);
 754             return;
 755         }
 756         if (ambiguous) {
 757             monitor_printf(mon, "Warning: Path '%s' is ambiguous.\n", path);
 758             return;
 759         }
 760     } else {
 761         obj = qdev_get_machine();
 762     }
 763     print_qom_composition(mon, obj, 0);
 764 }
 765
 766 int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data)
 767 {
 768     Error *local_err = NULL;
 769     QemuOpts *opts;
 770     DeviceState *dev;
 771
 772     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 773     if (local_err) {
 774         qerror_report_err(local_err);
 775         error_free(local_err);
 776         return -1;
 777     }
 778     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 779         qemu_opts_del(opts);
 780         return 0;
 781     }
 782     dev = qdev_device_add(opts);
 783     if (!dev) {
 784         qemu_opts_del(opts);
 785         return -1;
 786     }
 787     object_unref(OBJECT(dev));
 788     return 0;
 789 }
 790
 791 void qmp_device_del(const char *id, Error **errp)
 792 {
 793     Object *obj;
 794     char *root_path = object_get_canonical_path(qdev_get_peripheral());
 795     char *path = g_strdup_printf("%s/%s", root_path, id);
 796
 797     g_free(root_path);
 798     obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 799     g_free(path);
 800
 801     if (!obj) {
 802         error_set(errp, QERR_DEVICE_NOT_FOUND, id);
 803         return;
 804     }
 805
 806     qdev_unplug(DEVICE(obj), errp);
 807 }
 808
 809 void qdev_machine_init(void)
 810 {
 811     qdev_get_peripheral_anon();
 812     qdev_get_peripheral();
 813 }
 814
 815 QemuOptsList qemu_device_opts = {
 816     .name = "device",
 817     .implied_opt_name = "driver",
 818     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 819     .desc = {
 820         /*
 821          * no elements => accept any
 822          * sanity checking will happen later
 823          * when setting device properties
 824          */
 825         { /* end of list */ }
 826     },
 827 };
 828
 829 QemuOptsList qemu_global_opts = {
 830     .name = "global",
 831     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 832     .desc = {
 833         {
 834             .name = "driver",
 835             .type = QEMU_OPT_STRING,
 836         },{
 837             .name = "property",
 838             .type = QEMU_OPT_STRING,
 839         },{
 840             .name = "value",
 841             .type = QEMU_OPT_STRING,
 842         },
 843         { /* end of list */ }
 844     },
 845 };
 846
 847 int qemu_global_option(const char *str)
 848 {
 849     char driver[64], property[64];
 850     QemuOpts *opts;
 851     int rc, offset;
 852
 853     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 854     if (rc == 2 && str[offset] == '=') {
 855         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 856         qemu_opt_set(opts, "driver", driver, &error_abort);
 857         qemu_opt_set(opts, "property", property, &error_abort);
 858         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 859         return 0;
 860     }
 861
 862     opts = qemu_opts_parse(&qemu_global_opts, str, false);
 863     if (!opts) {
 864         return -1;
 865     }
 866
 867     return 0;
 868 }