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 "qemu/osdep.h"
  21 #include "hw/qdev.h"
  22 #include "hw/sysbus.h"
  23 #include "monitor/monitor.h"
  24 #include "monitor/qdev.h"
  25 #include "qmp-commands.h"
  26 #include "sysemu/arch_init.h"
  27 #include "qapi/qmp/qerror.h"
  28 #include "qemu/config-file.h"
  29 #include "qemu/error-report.h"
  30
  31 /*
  32  * Aliases were a bad idea from the start.  Let's keep them
  33  * from spreading further.
  34  */
  35 typedef struct QDevAlias
  36 {
  37     const char *typename;
  38     const char *alias;
  39     uint32_t arch_mask;
  40 } QDevAlias;
  41
  42 /* Please keep this table sorted by typename. */
  43 static const QDevAlias qdev_alias_table[] = {
  44     { "e1000", "e1000-82540em" },
  45     { "ich9-ahci", "ahci" },
  46     { "kvm-pci-assign", "pci-assign" },
  47     { "lsi53c895a", "lsi" },
  48     { "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_S390X },
  49     { "virtio-9p-pci", "virtio-9p", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  50     { "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_S390X },
  51     { "virtio-balloon-pci", "virtio-balloon",
  52             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  53     { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
  54     { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  55     { "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_S390X },
  56     { "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  57     { "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_S390X },
  58     { "virtio-input-host-pci", "virtio-input-host",
  59             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  60     { "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_S390X },
  61     { "virtio-keyboard-pci", "virtio-keyboard",
  62             QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  63     { "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_S390X },
  64     { "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  65     { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
  66     { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  67     { "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_S390X },
  68     { "virtio-rng-pci", "virtio-rng", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  69     { "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_S390X },
  70     { "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  71     { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
  72     { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  73     { "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_S390X },
  74     { "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
  75     { }
  76 };
  77
  78 static const char *qdev_class_get_alias(DeviceClass *dc)
  79 {
  80     const char *typename = object_class_get_name(OBJECT_CLASS(dc));
  81     int i;
  82
  83     for (i = 0; qdev_alias_table[i].typename; i++) {
  84         if (qdev_alias_table[i].arch_mask &&
  85             !(qdev_alias_table[i].arch_mask & arch_type)) {
  86             continue;
  87         }
  88
  89         if (strcmp(qdev_alias_table[i].typename, typename) == 0) {
  90             return qdev_alias_table[i].alias;
  91         }
  92     }
  93
  94     return NULL;
  95 }
  96
  97 static bool qdev_class_has_alias(DeviceClass *dc)
  98 {
  99     return (qdev_class_get_alias(dc) != NULL);
 100 }
 101
 102 static void qdev_print_devinfo(DeviceClass *dc)
 103 {
 104     error_printf("name \"%s\"", object_class_get_name(OBJECT_CLASS(dc)));
 105     if (dc->bus_type) {
 106         error_printf(", bus %s", dc->bus_type);
 107     }
 108     if (qdev_class_has_alias(dc)) {
 109         error_printf(", alias \"%s\"", qdev_class_get_alias(dc));
 110     }
 111     if (dc->desc) {
 112         error_printf(", desc \"%s\"", dc->desc);
 113     }
 114     if (dc->cannot_instantiate_with_device_add_yet) {
 115         error_printf(", no-user");
 116     }
 117     error_printf("\n");
 118 }
 119
 120 static gint devinfo_cmp(gconstpointer a, gconstpointer b)
 121 {
 122     return strcasecmp(object_class_get_name((ObjectClass *)a),
 123                       object_class_get_name((ObjectClass *)b));
 124 }
 125
 126 static void qdev_print_devinfos(bool show_no_user)
 127 {
 128     static const char *cat_name[DEVICE_CATEGORY_MAX + 1] = {
 129         [DEVICE_CATEGORY_BRIDGE]  = "Controller/Bridge/Hub",
 130         [DEVICE_CATEGORY_USB]     = "USB",
 131         [DEVICE_CATEGORY_STORAGE] = "Storage",
 132         [DEVICE_CATEGORY_NETWORK] = "Network",
 133         [DEVICE_CATEGORY_INPUT]   = "Input",
 134         [DEVICE_CATEGORY_DISPLAY] = "Display",
 135         [DEVICE_CATEGORY_SOUND]   = "Sound",
 136         [DEVICE_CATEGORY_MISC]    = "Misc",
 137         [DEVICE_CATEGORY_MAX]     = "Uncategorized",
 138     };
 139     GSList *list, *elt;
 140     int i;
 141     bool cat_printed;
 142
 143     list = g_slist_sort(object_class_get_list(TYPE_DEVICE, false),
 144                         devinfo_cmp);
 145
 146     for (i = 0; i <= DEVICE_CATEGORY_MAX; i++) {
 147         cat_printed = false;
 148         for (elt = list; elt; elt = elt->next) {
 149             DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
 150                                                  TYPE_DEVICE);
 151             if ((i < DEVICE_CATEGORY_MAX
 152                  ? !test_bit(i, dc->categories)
 153                  : !bitmap_empty(dc->categories, DEVICE_CATEGORY_MAX))
 154                 || (!show_no_user
 155                     && dc->cannot_instantiate_with_device_add_yet)) {
 156                 continue;
 157             }
 158             if (!cat_printed) {
 159                 error_printf("%s%s devices:\n", i ? "\n" : "",
 160                              cat_name[i]);
 161                 cat_printed = true;
 162             }
 163             qdev_print_devinfo(dc);
 164         }
 165     }
 166
 167     g_slist_free(list);
 168 }
 169
 170 static int set_property(void *opaque, const char *name, const char *value,
 171                         Error **errp)
 172 {
 173     Object *obj = opaque;
 174     Error *err = NULL;
 175
 176     if (strcmp(name, "driver") == 0)
 177         return 0;
 178     if (strcmp(name, "bus") == 0)
 179         return 0;
 180
 181     object_property_parse(obj, value, name, &err);
 182     if (err != NULL) {
 183         error_propagate(errp, err);
 184         return -1;
 185     }
 186     return 0;
 187 }
 188
 189 static const char *find_typename_by_alias(const char *alias)
 190 {
 191     int i;
 192
 193     for (i = 0; qdev_alias_table[i].alias; i++) {
 194         if (qdev_alias_table[i].arch_mask &&
 195             !(qdev_alias_table[i].arch_mask & arch_type)) {
 196             continue;
 197         }
 198
 199         if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
 200             return qdev_alias_table[i].typename;
 201         }
 202     }
 203
 204     return NULL;
 205 }
 206
 207 static DeviceClass *qdev_get_device_class(const char **driver, Error **errp)
 208 {
 209     ObjectClass *oc;
 210     DeviceClass *dc;
 211     const char *original_name = *driver;
 212
 213     oc = object_class_by_name(*driver);
 214     if (!oc) {
 215         const char *typename = find_typename_by_alias(*driver);
 216
 217         if (typename) {
 218             *driver = typename;
 219             oc = object_class_by_name(*driver);
 220         }
 221     }
 222
 223     if (!object_class_dynamic_cast(oc, TYPE_DEVICE)) {
 224         if (*driver != original_name) {
 225             error_setg(errp, "'%s' (alias '%s') is not a valid device model"
 226                        " name", original_name, *driver);
 227         } else {
 228             error_setg(errp, "'%s' is not a valid device model name", *driver);
 229         }
 230         return NULL;
 231     }
 232
 233     if (object_class_is_abstract(oc)) {
 234         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 235                    "non-abstract device type");
 236         return NULL;
 237     }
 238
 239     dc = DEVICE_CLASS(oc);
 240     if (dc->cannot_instantiate_with_device_add_yet ||
 241         (qdev_hotplug && !dc->hotpluggable)) {
 242         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "driver",
 243                    "pluggable device type");
 244         return NULL;
 245     }
 246
 247     return dc;
 248 }
 249
 250
 251 int qdev_device_help(QemuOpts *opts)
 252 {
 253     Error *local_err = NULL;
 254     const char *driver;
 255     DevicePropertyInfoList *prop_list;
 256     DevicePropertyInfoList *prop;
 257
 258     driver = qemu_opt_get(opts, "driver");
 259     if (driver && is_help_option(driver)) {
 260         qdev_print_devinfos(false);
 261         return 1;
 262     }
 263
 264     if (!driver || !qemu_opt_has_help_opt(opts)) {
 265         return 0;
 266     }
 267
 268     if (!object_class_by_name(driver)) {
 269         const char *typename = find_typename_by_alias(driver);
 270
 271         if (typename) {
 272             driver = typename;
 273         }
 274     }
 275
 276     prop_list = qmp_device_list_properties(driver, &local_err);
 277     if (local_err) {
 278         goto error;
 279     }
 280
 281     for (prop = prop_list; prop; prop = prop->next) {
 282         error_printf("%s.%s=%s", driver,
 283                      prop->value->name,
 284                      prop->value->type);
 285         if (prop->value->has_description) {
 286             error_printf(" (%s)\n", prop->value->description);
 287         } else {
 288             error_printf("\n");
 289         }
 290     }
 291
 292     qapi_free_DevicePropertyInfoList(prop_list);
 293     return 1;
 294
 295 error:
 296     error_report_err(local_err);
 297     return 1;
 298 }
 299
 300 static Object *qdev_get_peripheral(void)
 301 {
 302     static Object *dev;
 303
 304     if (dev == NULL) {
 305         dev = container_get(qdev_get_machine(), "/peripheral");
 306     }
 307
 308     return dev;
 309 }
 310
 311 static Object *qdev_get_peripheral_anon(void)
 312 {
 313     static Object *dev;
 314
 315     if (dev == NULL) {
 316         dev = container_get(qdev_get_machine(), "/peripheral-anon");
 317     }
 318
 319     return dev;
 320 }
 321
 322 static void qbus_list_bus(DeviceState *dev, Error **errp)
 323 {
 324     BusState *child;
 325     const char *sep = " ";
 326
 327     error_append_hint(errp, "child buses at \"%s\":",
 328                       dev->id ? dev->id : object_get_typename(OBJECT(dev)));
 329     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 330         error_append_hint(errp, "%s\"%s\"", sep, child->name);
 331         sep = ", ";
 332     }
 333     error_append_hint(errp, "\n");
 334 }
 335
 336 static void qbus_list_dev(BusState *bus, Error **errp)
 337 {
 338     BusChild *kid;
 339     const char *sep = " ";
 340
 341     error_append_hint(errp, "devices at \"%s\":", bus->name);
 342     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 343         DeviceState *dev = kid->child;
 344         error_append_hint(errp, "%s\"%s\"", sep,
 345                           object_get_typename(OBJECT(dev)));
 346         if (dev->id) {
 347             error_append_hint(errp, "/\"%s\"", dev->id);
 348         }
 349         sep = ", ";
 350     }
 351     error_append_hint(errp, "\n");
 352 }
 353
 354 static BusState *qbus_find_bus(DeviceState *dev, char *elem)
 355 {
 356     BusState *child;
 357
 358     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 359         if (strcmp(child->name, elem) == 0) {
 360             return child;
 361         }
 362     }
 363     return NULL;
 364 }
 365
 366 static DeviceState *qbus_find_dev(BusState *bus, char *elem)
 367 {
 368     BusChild *kid;
 369
 370     /*
 371      * try to match in order:
 372      *   (1) instance id, if present
 373      *   (2) driver name
 374      *   (3) driver alias, if present
 375      */
 376     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 377         DeviceState *dev = kid->child;
 378         if (dev->id  &&  strcmp(dev->id, elem) == 0) {
 379             return dev;
 380         }
 381     }
 382     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 383         DeviceState *dev = kid->child;
 384         if (strcmp(object_get_typename(OBJECT(dev)), elem) == 0) {
 385             return dev;
 386         }
 387     }
 388     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 389         DeviceState *dev = kid->child;
 390         DeviceClass *dc = DEVICE_GET_CLASS(dev);
 391
 392         if (qdev_class_has_alias(dc) &&
 393             strcmp(qdev_class_get_alias(dc), elem) == 0) {
 394             return dev;
 395         }
 396     }
 397     return NULL;
 398 }
 399
 400 static inline bool qbus_is_full(BusState *bus)
 401 {
 402     BusClass *bus_class = BUS_GET_CLASS(bus);
 403     return bus_class->max_dev && bus->max_index >= bus_class->max_dev;
 404 }
 405
 406 /*
 407  * Search the tree rooted at @bus for a bus.
 408  * If @name, search for a bus with that name.  Note that bus names
 409  * need not be unique.  Yes, that's screwed up.
 410  * Else search for a bus that is a subtype of @bus_typename.
 411  * If more than one exists, prefer one that can take another device.
 412  * Return the bus if found, else %NULL.
 413  */
 414 static BusState *qbus_find_recursive(BusState *bus, const char *name,
 415                                      const char *bus_typename)
 416 {
 417     BusChild *kid;
 418     BusState *pick, *child, *ret;
 419     bool match;
 420
 421     assert(name || bus_typename);
 422     if (name) {
 423         match = !strcmp(bus->name, name);
 424     } else {
 425         match = !!object_dynamic_cast(OBJECT(bus), bus_typename);
 426     }
 427
 428     if (match && !qbus_is_full(bus)) {
 429         return bus;             /* root matches and isn't full */
 430     }
 431
 432     pick = match ? bus : NULL;
 433
 434     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 435         DeviceState *dev = kid->child;
 436         QLIST_FOREACH(child, &dev->child_bus, sibling) {
 437             ret = qbus_find_recursive(child, name, bus_typename);
 438             if (ret && !qbus_is_full(ret)) {
 439                 return ret;     /* a descendant matches and isn't full */
 440             }
 441             if (ret && !pick) {
 442                 pick = ret;
 443             }
 444         }
 445     }
 446
 447     /* root or a descendant matches, but is full */
 448     return pick;
 449 }
 450
 451 static BusState *qbus_find(const char *path, Error **errp)
 452 {
 453     DeviceState *dev;
 454     BusState *bus;
 455     char elem[128];
 456     int pos, len;
 457
 458     /* find start element */
 459     if (path[0] == '/') {
 460         bus = sysbus_get_default();
 461         pos = 0;
 462     } else {
 463         if (sscanf(path, "%127[^/]%n", elem, &len) != 1) {
 464             assert(!path[0]);
 465             elem[0] = len = 0;
 466         }
 467         bus = qbus_find_recursive(sysbus_get_default(), elem, NULL);
 468         if (!bus) {
 469             error_setg(errp, "Bus '%s' not found", elem);
 470             return NULL;
 471         }
 472         pos = len;
 473     }
 474
 475     for (;;) {
 476         assert(path[pos] == '/' || !path[pos]);
 477         while (path[pos] == '/') {
 478             pos++;
 479         }
 480         if (path[pos] == '\0') {
 481             break;
 482         }
 483
 484         /* find device */
 485         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 486             g_assert_not_reached();
 487             elem[0] = len = 0;
 488         }
 489         pos += len;
 490         dev = qbus_find_dev(bus, elem);
 491         if (!dev) {
 492             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 493                       "Device '%s' not found", elem);
 494             qbus_list_dev(bus, errp);
 495             return NULL;
 496         }
 497
 498         assert(path[pos] == '/' || !path[pos]);
 499         while (path[pos] == '/') {
 500             pos++;
 501         }
 502         if (path[pos] == '\0') {
 503             /* last specified element is a device.  If it has exactly
 504              * one child bus accept it nevertheless */
 505             if (dev->num_child_bus == 1) {
 506                 bus = QLIST_FIRST(&dev->child_bus);
 507                 break;
 508             }
 509             if (dev->num_child_bus) {
 510                 error_setg(errp, "Device '%s' has multiple child buses",
 511                            elem);
 512                 qbus_list_bus(dev, errp);
 513             } else {
 514                 error_setg(errp, "Device '%s' has no child bus", elem);
 515             }
 516             return NULL;
 517         }
 518
 519         /* find bus */
 520         if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) {
 521             g_assert_not_reached();
 522             elem[0] = len = 0;
 523         }
 524         pos += len;
 525         bus = qbus_find_bus(dev, elem);
 526         if (!bus) {
 527             error_setg(errp, "Bus '%s' not found", elem);
 528             qbus_list_bus(dev, errp);
 529             return NULL;
 530         }
 531     }
 532
 533     if (qbus_is_full(bus)) {
 534         error_setg(errp, "Bus '%s' is full", path);
 535         return NULL;
 536     }
 537     return bus;
 538 }
 539
 540 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
 541 {
 542     DeviceClass *dc;
 543     const char *driver, *path, *id;
 544     DeviceState *dev;
 545     BusState *bus = NULL;
 546     Error *err = NULL;
 547
 548     driver = qemu_opt_get(opts, "driver");
 549     if (!driver) {
 550         error_setg(errp, QERR_MISSING_PARAMETER, "driver");
 551         return NULL;
 552     }
 553
 554     /* find driver */
 555     dc = qdev_get_device_class(&driver, errp);
 556     if (!dc) {
 557         return NULL;
 558     }
 559
 560     /* find bus */
 561     path = qemu_opt_get(opts, "bus");
 562     if (path != NULL) {
 563         bus = qbus_find(path, errp);
 564         if (!bus) {
 565             return NULL;
 566         }
 567         if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) {
 568             error_setg(errp, "Device '%s' can't go on %s bus",
 569                        driver, object_get_typename(OBJECT(bus)));
 570             return NULL;
 571         }
 572     } else if (dc->bus_type != NULL) {
 573         bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
 574         if (!bus || qbus_is_full(bus)) {
 575             error_setg(errp, "No '%s' bus found for device '%s'",
 576                        dc->bus_type, driver);
 577             return NULL;
 578         }
 579     }
 580     if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
 581         error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name);
 582         return NULL;
 583     }
 584
 585     /* create device */
 586     dev = DEVICE(object_new(driver));
 587
 588     if (bus) {
 589         qdev_set_parent_bus(dev, bus);
 590     }
 591
 592     id = qemu_opts_id(opts);
 593     if (id) {
 594         dev->id = id;
 595     }
 596
 597     if (dev->id) {
 598         object_property_add_child(qdev_get_peripheral(), dev->id,
 599                                   OBJECT(dev), NULL);
 600     } else {
 601         static int anon_count;
 602         gchar *name = g_strdup_printf("device[%d]", anon_count++);
 603         object_property_add_child(qdev_get_peripheral_anon(), name,
 604                                   OBJECT(dev), NULL);
 605         g_free(name);
 606     }
 607
 608     /* set properties */
 609     if (qemu_opt_foreach(opts, set_property, dev, &err)) {
 610         error_propagate(errp, err);
 611         object_unparent(OBJECT(dev));
 612         object_unref(OBJECT(dev));
 613         return NULL;
 614     }
 615
 616     dev->opts = opts;
 617     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 618     if (err != NULL) {
 619         error_propagate(errp, err);
 620         dev->opts = NULL;
 621         object_unparent(OBJECT(dev));
 622         object_unref(OBJECT(dev));
 623         return NULL;
 624     }
 625     return dev;
 626 }
 627
 628
 629 #define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
 630 static void qbus_print(Monitor *mon, BusState *bus, int indent);
 631
 632 static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 633                              int indent)
 634 {
 635     if (!props)
 636         return;
 637     for (; props->name; props++) {
 638         Error *err = NULL;
 639         char *value;
 640         char *legacy_name = g_strdup_printf("legacy-%s", props->name);
 641         if (object_property_get_type(OBJECT(dev), legacy_name, NULL)) {
 642             value = object_property_get_str(OBJECT(dev), legacy_name, &err);
 643         } else {
 644             value = object_property_print(OBJECT(dev), props->name, true, &err);
 645         }
 646         g_free(legacy_name);
 647
 648         if (err) {
 649             error_free(err);
 650             continue;
 651         }
 652         qdev_printf("%s = %s\n", props->name,
 653                     value && *value ? value : "<null>");
 654         g_free(value);
 655     }
 656 }
 657
 658 static void bus_print_dev(BusState *bus, Monitor *mon, DeviceState *dev, int indent)
 659 {
 660     BusClass *bc = BUS_GET_CLASS(bus);
 661
 662     if (bc->print_dev) {
 663         bc->print_dev(mon, dev, indent);
 664     }
 665 }
 666
 667 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 668 {
 669     ObjectClass *class;
 670     BusState *child;
 671     NamedGPIOList *ngl;
 672
 673     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
 674                 dev->id ? dev->id : "");
 675     indent += 2;
 676     QLIST_FOREACH(ngl, &dev->gpios, node) {
 677         if (ngl->num_in) {
 678             qdev_printf("gpio-in \"%s\" %d\n", ngl->name ? ngl->name : "",
 679                         ngl->num_in);
 680         }
 681         if (ngl->num_out) {
 682             qdev_printf("gpio-out \"%s\" %d\n", ngl->name ? ngl->name : "",
 683                         ngl->num_out);
 684         }
 685     }
 686     class = object_get_class(OBJECT(dev));
 687     do {
 688         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
 689         class = object_class_get_parent(class);
 690     } while (class != object_class_by_name(TYPE_DEVICE));
 691     bus_print_dev(dev->parent_bus, mon, dev, indent);
 692     QLIST_FOREACH(child, &dev->child_bus, sibling) {
 693         qbus_print(mon, child, indent);
 694     }
 695 }
 696
 697 static void qbus_print(Monitor *mon, BusState *bus, int indent)
 698 {
 699     BusChild *kid;
 700
 701     qdev_printf("bus: %s\n", bus->name);
 702     indent += 2;
 703     qdev_printf("type %s\n", object_get_typename(OBJECT(bus)));
 704     QTAILQ_FOREACH(kid, &bus->children, sibling) {
 705         DeviceState *dev = kid->child;
 706         qdev_print(mon, dev, indent);
 707     }
 708 }
 709 #undef qdev_printf
 710
 711 void hmp_info_qtree(Monitor *mon, const QDict *qdict)
 712 {
 713     if (sysbus_get_default())
 714         qbus_print(mon, sysbus_get_default(), 0);
 715 }
 716
 717 void hmp_info_qdm(Monitor *mon, const QDict *qdict)
 718 {
 719     qdev_print_devinfos(true);
 720 }
 721
 722 typedef struct QOMCompositionState {
 723     Monitor *mon;
 724     int indent;
 725 } QOMCompositionState;
 726
 727 static void print_qom_composition(Monitor *mon, Object *obj, int indent);
 728
 729 static int print_qom_composition_child(Object *obj, void *opaque)
 730 {
 731     QOMCompositionState *s = opaque;
 732
 733     print_qom_composition(s->mon, obj, s->indent);
 734
 735     return 0;
 736 }
 737
 738 static void print_qom_composition(Monitor *mon, Object *obj, int indent)
 739 {
 740     QOMCompositionState s = {
 741         .mon = mon,
 742         .indent = indent + 2,
 743     };
 744     char *name;
 745
 746     if (obj == object_get_root()) {
 747         name = g_strdup("");
 748     } else {
 749         name = object_get_canonical_path_component(obj);
 750     }
 751     monitor_printf(mon, "%*s/%s (%s)\n", indent, "", name,
 752                    object_get_typename(obj));
 753     g_free(name);
 754     object_child_foreach(obj, print_qom_composition_child, &s);
 755 }
 756
 757 void hmp_info_qom_tree(Monitor *mon, const QDict *dict)
 758 {
 759     const char *path = qdict_get_try_str(dict, "path");
 760     Object *obj;
 761     bool ambiguous = false;
 762
 763     if (path) {
 764         obj = object_resolve_path(path, &ambiguous);
 765         if (!obj) {
 766             monitor_printf(mon, "Path '%s' could not be resolved.\n", path);
 767             return;
 768         }
 769         if (ambiguous) {
 770             monitor_printf(mon, "Warning: Path '%s' is ambiguous.\n", path);
 771             return;
 772         }
 773     } else {
 774         obj = qdev_get_machine();
 775     }
 776     print_qom_composition(mon, obj, 0);
 777 }
 778
 779 void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp)
 780 {
 781     Error *local_err = NULL;
 782     QemuOpts *opts;
 783     DeviceState *dev;
 784
 785     opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict, &local_err);
 786     if (local_err) {
 787         error_propagate(errp, local_err);
 788         return;
 789     }
 790     if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
 791         qemu_opts_del(opts);
 792         return;
 793     }
 794     dev = qdev_device_add(opts, &local_err);
 795     if (!dev) {
 796         error_propagate(errp, local_err);
 797         qemu_opts_del(opts);
 798         return;
 799     }
 800     object_unref(OBJECT(dev));
 801 }
 802
 803 void qmp_device_del(const char *id, Error **errp)
 804 {
 805     Object *obj;
 806
 807     if (id[0] == '/') {
 808         obj = object_resolve_path(id, NULL);
 809     } else {
 810         char *root_path = object_get_canonical_path(qdev_get_peripheral());
 811         char *path = g_strdup_printf("%s/%s", root_path, id);
 812
 813         g_free(root_path);
 814         obj = object_resolve_path_type(path, TYPE_DEVICE, NULL);
 815         g_free(path);
 816     }
 817
 818     if (!obj) {
 819         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 820                   "Device '%s' not found", id);
 821         return;
 822     }
 823
 824     if (!object_dynamic_cast(obj, TYPE_DEVICE)) {
 825         error_setg(errp, "%s is not a hotpluggable device", id);
 826         return;
 827     }
 828
 829     qdev_unplug(DEVICE(obj), errp);
 830 }
 831
 832 void qdev_machine_init(void)
 833 {
 834     qdev_get_peripheral_anon();
 835     qdev_get_peripheral();
 836 }
 837
 838 QemuOptsList qemu_device_opts = {
 839     .name = "device",
 840     .implied_opt_name = "driver",
 841     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 842     .desc = {
 843         /*
 844          * no elements => accept any
 845          * sanity checking will happen later
 846          * when setting device properties
 847          */
 848         { /* end of list */ }
 849     },
 850 };
 851
 852 QemuOptsList qemu_global_opts = {
 853     .name = "global",
 854     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 855     .desc = {
 856         {
 857             .name = "driver",
 858             .type = QEMU_OPT_STRING,
 859         },{
 860             .name = "property",
 861             .type = QEMU_OPT_STRING,
 862         },{
 863             .name = "value",
 864             .type = QEMU_OPT_STRING,
 865         },
 866         { /* end of list */ }
 867     },
 868 };
 869
 870 int qemu_global_option(const char *str)
 871 {
 872     char driver[64], property[64];
 873     QemuOpts *opts;
 874     int rc, offset;
 875
 876     rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
 877     if (rc == 2 && str[offset] == '=') {
 878         opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
 879         qemu_opt_set(opts, "driver", driver, &error_abort);
 880         qemu_opt_set(opts, "property", property, &error_abort);
 881         qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
 882         return 0;
 883     }
 884
 885     opts = qemu_opts_parse_noisily(&qemu_global_opts, str, false);
 886     if (!opts) {
 887         return -1;
 888     }
 889
 890     return 0;
 891 }