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