qmp.c

   1 /*
   2  * QEMU Management Protocol
   3  *
   4  * Copyright IBM, Corp. 2011
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2.  See
  10  * the COPYING file in the top-level directory.
  11  *
  12  * Contributions after 2012-01-13 are licensed under the terms of the
  13  * GNU GPL, version 2 or (at your option) any later version.
  14  */
  15
  16 #include "qemu/osdep.h"
  17 #include "qemu-common.h"
  18 #include "monitor/monitor.h"
  19 #include "sysemu/sysemu.h"
  20 #include "qmp-commands.h"
  21 #include "sysemu/char.h"
  22 #include "ui/qemu-spice.h"
  23 #include "ui/vnc.h"
  24 #include "sysemu/kvm.h"
  25 #include "sysemu/arch_init.h"
  26 #include "hw/qdev.h"
  27 #include "sysemu/blockdev.h"
  28 #include "sysemu/block-backend.h"
  29 #include "qom/qom-qobject.h"
  30 #include "qapi/qmp/qerror.h"
  31 #include "qapi/qmp/qobject.h"
  32 #include "qapi/qmp-input-visitor.h"
  33 #include "hw/boards.h"
  34 #include "qom/object_interfaces.h"
  35 #include "hw/mem/pc-dimm.h"
  36 #include "hw/acpi/acpi_dev_interface.h"
  37
  38 NameInfo *qmp_query_name(Error **errp)
  39 {
  40     NameInfo *info = g_malloc0(sizeof(*info));
  41
  42     if (qemu_name) {
  43         info->has_name = true;
  44         info->name = g_strdup(qemu_name);
  45     }
  46
  47     return info;
  48 }
  49
  50 VersionInfo *qmp_query_version(Error **errp)
  51 {
  52     VersionInfo *info = g_new0(VersionInfo, 1);
  53     const char *version = QEMU_VERSION;
  54     const char *tmp;
  55     int err;
  56
  57     info->qemu = g_new0(VersionTriple, 1);
  58     err = qemu_strtoll(version, &tmp, 10, &info->qemu->major);
  59     assert(err == 0);
  60     tmp++;
  61
  62     err = qemu_strtoll(tmp, &tmp, 10, &info->qemu->minor);
  63     assert(err == 0);
  64     tmp++;
  65
  66     err = qemu_strtoll(tmp, &tmp, 10, &info->qemu->micro);
  67     assert(err == 0);
  68     info->package = g_strdup(QEMU_PKGVERSION);
  69
  70     return info;
  71 }
  72
  73 KvmInfo *qmp_query_kvm(Error **errp)
  74 {
  75     KvmInfo *info = g_malloc0(sizeof(*info));
  76
  77     info->enabled = kvm_enabled();
  78     info->present = kvm_available();
  79
  80     return info;
  81 }
  82
  83 UuidInfo *qmp_query_uuid(Error **errp)
  84 {
  85     UuidInfo *info = g_malloc0(sizeof(*info));
  86     char uuid[64];
  87
  88     snprintf(uuid, sizeof(uuid), UUID_FMT, qemu_uuid[0], qemu_uuid[1],
  89                    qemu_uuid[2], qemu_uuid[3], qemu_uuid[4], qemu_uuid[5],
  90                    qemu_uuid[6], qemu_uuid[7], qemu_uuid[8], qemu_uuid[9],
  91                    qemu_uuid[10], qemu_uuid[11], qemu_uuid[12], qemu_uuid[13],
  92                    qemu_uuid[14], qemu_uuid[15]);
  93
  94     info->UUID = g_strdup(uuid);
  95     return info;
  96 }
  97
  98 void qmp_quit(Error **errp)
  99 {
 100     no_shutdown = 0;
 101     qemu_system_shutdown_request();
 102 }
 103
 104 void qmp_stop(Error **errp)
 105 {
 106     if (runstate_check(RUN_STATE_INMIGRATE)) {
 107         autostart = 0;
 108     } else {
 109         vm_stop(RUN_STATE_PAUSED);
 110     }
 111 }
 112
 113 void qmp_system_reset(Error **errp)
 114 {
 115     qemu_system_reset_request();
 116 }
 117
 118 void qmp_system_powerdown(Error **erp)
 119 {
 120     qemu_system_powerdown_request();
 121 }
 122
 123 void qmp_cpu(int64_t index, Error **errp)
 124 {
 125     /* Just do nothing */
 126 }
 127
 128 void qmp_cpu_add(int64_t id, Error **errp)
 129 {
 130     MachineClass *mc;
 131
 132     mc = MACHINE_GET_CLASS(current_machine);
 133     if (mc->hot_add_cpu) {
 134         mc->hot_add_cpu(id, errp);
 135     } else {
 136         error_setg(errp, "Not supported");
 137     }
 138 }
 139
 140 #ifndef CONFIG_VNC
 141 /* If VNC support is enabled, the "true" query-vnc command is
 142    defined in the VNC subsystem */
 143 VncInfo *qmp_query_vnc(Error **errp)
 144 {
 145     error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
 146     return NULL;
 147 };
 148
 149 VncInfo2List *qmp_query_vnc_servers(Error **errp)
 150 {
 151     error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
 152     return NULL;
 153 };
 154 #endif
 155
 156 #ifndef CONFIG_SPICE
 157 /*
 158  * qmp-commands.hx ensures that QMP command query-spice exists only
 159  * #ifdef CONFIG_SPICE.  Necessary for an accurate query-commands
 160  * result.  However, the QAPI schema is blissfully unaware of that,
 161  * and the QAPI code generator happily generates a dead
 162  * qmp_marshal_query_spice() that calls qmp_query_spice().  Provide it
 163  * one, or else linking fails.  FIXME Educate the QAPI schema on
 164  * CONFIG_SPICE.
 165  */
 166 SpiceInfo *qmp_query_spice(Error **errp)
 167 {
 168     abort();
 169 };
 170 #endif
 171
 172 void qmp_cont(Error **errp)
 173 {
 174     Error *local_err = NULL;
 175     BlockBackend *blk;
 176     BlockDriverState *bs;
 177
 178     if (runstate_needs_reset()) {
 179         error_setg(errp, "Resetting the Virtual Machine is required");
 180         return;
 181     } else if (runstate_check(RUN_STATE_SUSPENDED)) {
 182         return;
 183     }
 184
 185     for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
 186         blk_iostatus_reset(blk);
 187     }
 188     for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
 189         bdrv_add_key(bs, NULL, &local_err);
 190         if (local_err) {
 191             error_propagate(errp, local_err);
 192             return;
 193         }
 194     }
 195
 196     /* Continuing after completed migration. Images have been inactivated to
 197      * allow the destination to take control. Need to get control back now. */
 198     if (runstate_check(RUN_STATE_FINISH_MIGRATE) ||
 199         runstate_check(RUN_STATE_POSTMIGRATE))
 200     {
 201         bdrv_invalidate_cache_all(&local_err);
 202         if (local_err) {
 203             error_propagate(errp, local_err);
 204             return;
 205         }
 206     }
 207
 208     if (runstate_check(RUN_STATE_INMIGRATE)) {
 209         autostart = 1;
 210     } else {
 211         vm_start();
 212     }
 213 }
 214
 215 void qmp_system_wakeup(Error **errp)
 216 {
 217     qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
 218 }
 219
 220 ObjectPropertyInfoList *qmp_qom_list(const char *path, Error **errp)
 221 {
 222     Object *obj;
 223     bool ambiguous = false;
 224     ObjectPropertyInfoList *props = NULL;
 225     ObjectProperty *prop;
 226     ObjectPropertyIterator iter;
 227
 228     obj = object_resolve_path(path, &ambiguous);
 229     if (obj == NULL) {
 230         if (ambiguous) {
 231             error_setg(errp, "Path '%s' is ambiguous", path);
 232         } else {
 233             error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 234                       "Device '%s' not found", path);
 235         }
 236         return NULL;
 237     }
 238
 239     object_property_iter_init(&iter, obj);
 240     while ((prop = object_property_iter_next(&iter))) {
 241         ObjectPropertyInfoList *entry = g_malloc0(sizeof(*entry));
 242
 243         entry->value = g_malloc0(sizeof(ObjectPropertyInfo));
 244         entry->next = props;
 245         props = entry;
 246
 247         entry->value->name = g_strdup(prop->name);
 248         entry->value->type = g_strdup(prop->type);
 249     }
 250
 251     return props;
 252 }
 253
 254 void qmp_qom_set(const char *path, const char *property, QObject *value,
 255                  Error **errp)
 256 {
 257     Object *obj;
 258
 259     obj = object_resolve_path(path, NULL);
 260     if (!obj) {
 261         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 262                   "Device '%s' not found", path);
 263         return;
 264     }
 265
 266     object_property_set_qobject(obj, value, property, errp);
 267 }
 268
 269 QObject *qmp_qom_get(const char *path, const char *property, Error **errp)
 270 {
 271     Object *obj;
 272
 273     obj = object_resolve_path(path, NULL);
 274     if (!obj) {
 275         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 276                   "Device '%s' not found", path);
 277         return NULL;
 278     }
 279
 280     return object_property_get_qobject(obj, property, errp);
 281 }
 282
 283 void qmp_set_password(const char *protocol, const char *password,
 284                       bool has_connected, const char *connected, Error **errp)
 285 {
 286     int disconnect_if_connected = 0;
 287     int fail_if_connected = 0;
 288     int rc;
 289
 290     if (has_connected) {
 291         if (strcmp(connected, "fail") == 0) {
 292             fail_if_connected = 1;
 293         } else if (strcmp(connected, "disconnect") == 0) {
 294             disconnect_if_connected = 1;
 295         } else if (strcmp(connected, "keep") == 0) {
 296             /* nothing */
 297         } else {
 298             error_setg(errp, QERR_INVALID_PARAMETER, "connected");
 299             return;
 300         }
 301     }
 302
 303     if (strcmp(protocol, "spice") == 0) {
 304         if (!qemu_using_spice(errp)) {
 305             return;
 306         }
 307         rc = qemu_spice_set_passwd(password, fail_if_connected,
 308                                    disconnect_if_connected);
 309         if (rc != 0) {
 310             error_setg(errp, QERR_SET_PASSWD_FAILED);
 311         }
 312         return;
 313     }
 314
 315     if (strcmp(protocol, "vnc") == 0) {
 316         if (fail_if_connected || disconnect_if_connected) {
 317             /* vnc supports "connected=keep" only */
 318             error_setg(errp, QERR_INVALID_PARAMETER, "connected");
 319             return;
 320         }
 321         /* Note that setting an empty password will not disable login through
 322          * this interface. */
 323         rc = vnc_display_password(NULL, password);
 324         if (rc < 0) {
 325             error_setg(errp, QERR_SET_PASSWD_FAILED);
 326         }
 327         return;
 328     }
 329
 330     error_setg(errp, QERR_INVALID_PARAMETER, "protocol");
 331 }
 332
 333 void qmp_expire_password(const char *protocol, const char *whenstr,
 334                          Error **errp)
 335 {
 336     time_t when;
 337     int rc;
 338
 339     if (strcmp(whenstr, "now") == 0) {
 340         when = 0;
 341     } else if (strcmp(whenstr, "never") == 0) {
 342         when = TIME_MAX;
 343     } else if (whenstr[0] == '+') {
 344         when = time(NULL) + strtoull(whenstr+1, NULL, 10);
 345     } else {
 346         when = strtoull(whenstr, NULL, 10);
 347     }
 348
 349     if (strcmp(protocol, "spice") == 0) {
 350         if (!qemu_using_spice(errp)) {
 351             return;
 352         }
 353         rc = qemu_spice_set_pw_expire(when);
 354         if (rc != 0) {
 355             error_setg(errp, QERR_SET_PASSWD_FAILED);
 356         }
 357         return;
 358     }
 359
 360     if (strcmp(protocol, "vnc") == 0) {
 361         rc = vnc_display_pw_expire(NULL, when);
 362         if (rc != 0) {
 363             error_setg(errp, QERR_SET_PASSWD_FAILED);
 364         }
 365         return;
 366     }
 367
 368     error_setg(errp, QERR_INVALID_PARAMETER, "protocol");
 369 }
 370
 371 #ifdef CONFIG_VNC
 372 void qmp_change_vnc_password(const char *password, Error **errp)
 373 {
 374     if (vnc_display_password(NULL, password) < 0) {
 375         error_setg(errp, QERR_SET_PASSWD_FAILED);
 376     }
 377 }
 378
 379 static void qmp_change_vnc_listen(const char *target, Error **errp)
 380 {
 381     QemuOptsList *olist = qemu_find_opts("vnc");
 382     QemuOpts *opts;
 383
 384     if (strstr(target, "id=")) {
 385         error_setg(errp, "id not supported");
 386         return;
 387     }
 388
 389     opts = qemu_opts_find(olist, "default");
 390     if (opts) {
 391         qemu_opts_del(opts);
 392     }
 393     opts = vnc_parse(target, errp);
 394     if (!opts) {
 395         return;
 396     }
 397
 398     vnc_display_open("default", errp);
 399 }
 400
 401 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 402                            Error **errp)
 403 {
 404     if (strcmp(target, "passwd") == 0 || strcmp(target, "password") == 0) {
 405         if (!has_arg) {
 406             error_setg(errp, QERR_MISSING_PARAMETER, "password");
 407         } else {
 408             qmp_change_vnc_password(arg, errp);
 409         }
 410     } else {
 411         qmp_change_vnc_listen(target, errp);
 412     }
 413 }
 414 #else
 415 void qmp_change_vnc_password(const char *password, Error **errp)
 416 {
 417     error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
 418 }
 419 static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
 420                            Error **errp)
 421 {
 422     error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
 423 }
 424 #endif /* !CONFIG_VNC */
 425
 426 void qmp_change(const char *device, const char *target,
 427                 bool has_arg, const char *arg, Error **errp)
 428 {
 429     if (strcmp(device, "vnc") == 0) {
 430         qmp_change_vnc(target, has_arg, arg, errp);
 431     } else {
 432         qmp_blockdev_change_medium(device, target, has_arg, arg, false, 0,
 433                                    errp);
 434     }
 435 }
 436
 437 static void qom_list_types_tramp(ObjectClass *klass, void *data)
 438 {
 439     ObjectTypeInfoList *e, **pret = data;
 440     ObjectTypeInfo *info;
 441
 442     info = g_malloc0(sizeof(*info));
 443     info->name = g_strdup(object_class_get_name(klass));
 444
 445     e = g_malloc0(sizeof(*e));
 446     e->value = info;
 447     e->next = *pret;
 448     *pret = e;
 449 }
 450
 451 ObjectTypeInfoList *qmp_qom_list_types(bool has_implements,
 452                                        const char *implements,
 453                                        bool has_abstract,
 454                                        bool abstract,
 455                                        Error **errp)
 456 {
 457     ObjectTypeInfoList *ret = NULL;
 458
 459     object_class_foreach(qom_list_types_tramp, implements, abstract, &ret);
 460
 461     return ret;
 462 }
 463
 464 /* Return a DevicePropertyInfo for a qdev property.
 465  *
 466  * If a qdev property with the given name does not exist, use the given default
 467  * type.  If the qdev property info should not be shown, return NULL.
 468  *
 469  * The caller must free the return value.
 470  */
 471 static DevicePropertyInfo *make_device_property_info(ObjectClass *klass,
 472                                                      const char *name,
 473                                                      const char *default_type,
 474                                                      const char *description)
 475 {
 476     DevicePropertyInfo *info;
 477     Property *prop;
 478
 479     do {
 480         for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) {
 481             if (strcmp(name, prop->name) != 0) {
 482                 continue;
 483             }
 484
 485             /*
 486              * TODO Properties without a parser are just for dirty hacks.
 487              * qdev_prop_ptr is the only such PropertyInfo.  It's marked
 488              * for removal.  This conditional should be removed along with
 489              * it.
 490              */
 491             if (!prop->info->set) {
 492                 return NULL;           /* no way to set it, don't show */
 493             }
 494
 495             info = g_malloc0(sizeof(*info));
 496             info->name = g_strdup(prop->name);
 497             info->type = g_strdup(prop->info->name);
 498             info->has_description = !!prop->info->description;
 499             info->description = g_strdup(prop->info->description);
 500             return info;
 501         }
 502         klass = object_class_get_parent(klass);
 503     } while (klass != object_class_by_name(TYPE_DEVICE));
 504
 505     /* Not a qdev property, use the default type */
 506     info = g_malloc0(sizeof(*info));
 507     info->name = g_strdup(name);
 508     info->type = g_strdup(default_type);
 509     info->has_description = !!description;
 510     info->description = g_strdup(description);
 511
 512     return info;
 513 }
 514
 515 DevicePropertyInfoList *qmp_device_list_properties(const char *typename,
 516                                                    Error **errp)
 517 {
 518     ObjectClass *klass;
 519     Object *obj;
 520     ObjectProperty *prop;
 521     ObjectPropertyIterator iter;
 522     DevicePropertyInfoList *prop_list = NULL;
 523
 524     klass = object_class_by_name(typename);
 525     if (klass == NULL) {
 526         error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
 527                   "Device '%s' not found", typename);
 528         return NULL;
 529     }
 530
 531     klass = object_class_dynamic_cast(klass, TYPE_DEVICE);
 532     if (klass == NULL) {
 533         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "name", TYPE_DEVICE);
 534         return NULL;
 535     }
 536
 537     if (object_class_is_abstract(klass)) {
 538         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "name",
 539                    "non-abstract device type");
 540         return NULL;
 541     }
 542
 543     if (DEVICE_CLASS(klass)->cannot_destroy_with_object_finalize_yet) {
 544         error_setg(errp, "Can't list properties of device '%s'", typename);
 545         return NULL;
 546     }
 547
 548     obj = object_new(typename);
 549
 550     object_property_iter_init(&iter, obj);
 551     while ((prop = object_property_iter_next(&iter))) {
 552         DevicePropertyInfo *info;
 553         DevicePropertyInfoList *entry;
 554
 555         /* Skip Object and DeviceState properties */
 556         if (strcmp(prop->name, "type") == 0 ||
 557             strcmp(prop->name, "realized") == 0 ||
 558             strcmp(prop->name, "hotpluggable") == 0 ||
 559             strcmp(prop->name, "hotplugged") == 0 ||
 560             strcmp(prop->name, "parent_bus") == 0) {
 561             continue;
 562         }
 563
 564         /* Skip legacy properties since they are just string versions of
 565          * properties that we already list.
 566          */
 567         if (strstart(prop->name, "legacy-", NULL)) {
 568             continue;
 569         }
 570
 571         info = make_device_property_info(klass, prop->name, prop->type,
 572                                          prop->description);
 573         if (!info) {
 574             continue;
 575         }
 576
 577         entry = g_malloc0(sizeof(*entry));
 578         entry->value = info;
 579         entry->next = prop_list;
 580         prop_list = entry;
 581     }
 582
 583     object_unref(obj);
 584
 585     return prop_list;
 586 }
 587
 588 CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
 589 {
 590     return arch_query_cpu_definitions(errp);
 591 }
 592
 593 void qmp_add_client(const char *protocol, const char *fdname,
 594                     bool has_skipauth, bool skipauth, bool has_tls, bool tls,
 595                     Error **errp)
 596 {
 597     CharDriverState *s;
 598     int fd;
 599
 600     fd = monitor_get_fd(cur_mon, fdname, errp);
 601     if (fd < 0) {
 602         return;
 603     }
 604
 605     if (strcmp(protocol, "spice") == 0) {
 606         if (!qemu_using_spice(errp)) {
 607             close(fd);
 608             return;
 609         }
 610         skipauth = has_skipauth ? skipauth : false;
 611         tls = has_tls ? tls : false;
 612         if (qemu_spice_display_add_client(fd, skipauth, tls) < 0) {
 613             error_setg(errp, "spice failed to add client");
 614             close(fd);
 615         }
 616         return;
 617 #ifdef CONFIG_VNC
 618     } else if (strcmp(protocol, "vnc") == 0) {
 619         skipauth = has_skipauth ? skipauth : false;
 620         vnc_display_add_client(NULL, fd, skipauth);
 621         return;
 622 #endif
 623     } else if ((s = qemu_chr_find(protocol)) != NULL) {
 624         if (qemu_chr_add_client(s, fd) < 0) {
 625             error_setg(errp, "failed to add client");
 626             close(fd);
 627             return;
 628         }
 629         return;
 630     }
 631
 632     error_setg(errp, "protocol '%s' is invalid", protocol);
 633     close(fd);
 634 }
 635
 636 void object_add(const char *type, const char *id, const QDict *qdict,
 637                 Visitor *v, Error **errp)
 638 {
 639     Object *obj;
 640     ObjectClass *klass;
 641     const QDictEntry *e;
 642     Error *local_err = NULL;
 643
 644     klass = object_class_by_name(type);
 645     if (!klass) {
 646         error_setg(errp, "invalid object type: %s", type);
 647         return;
 648     }
 649
 650     if (!object_class_dynamic_cast(klass, TYPE_USER_CREATABLE)) {
 651         error_setg(errp, "object type '%s' isn't supported by object-add",
 652                    type);
 653         return;
 654     }
 655
 656     if (object_class_is_abstract(klass)) {
 657         error_setg(errp, "object type '%s' is abstract", type);
 658         return;
 659     }
 660
 661     obj = object_new(type);
 662     if (qdict) {
 663         for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {
 664             object_property_set(obj, v, e->key, &local_err);
 665             if (local_err) {
 666                 goto out;
 667             }
 668         }
 669     }
 670
 671     object_property_add_child(object_get_objects_root(),
 672                               id, obj, &local_err);
 673     if (local_err) {
 674         goto out;
 675     }
 676
 677     user_creatable_complete(obj, &local_err);
 678     if (local_err) {
 679         object_property_del(object_get_objects_root(),
 680                             id, &error_abort);
 681         goto out;
 682     }
 683 out:
 684     if (local_err) {
 685         error_propagate(errp, local_err);
 686     }
 687     object_unref(obj);
 688 }
 689
 690 void qmp_object_add(const char *type, const char *id,
 691                     bool has_props, QObject *props, Error **errp)
 692 {
 693     const QDict *pdict = NULL;
 694     QmpInputVisitor *qiv;
 695
 696     if (props) {
 697         pdict = qobject_to_qdict(props);
 698         if (!pdict) {
 699             error_setg(errp, QERR_INVALID_PARAMETER_TYPE, "props", "dict");
 700             return;
 701         }
 702     }
 703
 704     qiv = qmp_input_visitor_new(props);
 705     object_add(type, id, pdict, qmp_input_get_visitor(qiv), errp);
 706     qmp_input_visitor_cleanup(qiv);
 707 }
 708
 709 void qmp_object_del(const char *id, Error **errp)
 710 {
 711     Object *container;
 712     Object *obj;
 713
 714     container = object_get_objects_root();
 715     obj = object_resolve_path_component(container, id);
 716     if (!obj) {
 717         error_setg(errp, "object id not found");
 718         return;
 719     }
 720
 721     if (!user_creatable_can_be_deleted(USER_CREATABLE(obj), errp)) {
 722         error_setg(errp, "%s is in use, can not be deleted", id);
 723         return;
 724     }
 725     object_unparent(obj);
 726 }
 727
 728 MemoryDeviceInfoList *qmp_query_memory_devices(Error **errp)
 729 {
 730     MemoryDeviceInfoList *head = NULL;
 731     MemoryDeviceInfoList **prev = &head;
 732
 733     qmp_pc_dimm_device_list(qdev_get_machine(), &prev);
 734
 735     return head;
 736 }
 737
 738 ACPIOSTInfoList *qmp_query_acpi_ospm_status(Error **errp)
 739 {
 740     bool ambig;
 741     ACPIOSTInfoList *head = NULL;
 742     ACPIOSTInfoList **prev = &head;
 743     Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, &ambig);
 744
 745     if (obj) {
 746         AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj);
 747         AcpiDeviceIf *adev = ACPI_DEVICE_IF(obj);
 748
 749         adevc->ospm_status(adev, &prev);
 750     } else {
 751         error_setg(errp, "command is not supported, missing ACPI device");
 752     }
 753
 754     return head;
 755 }