DeviceState *qdev_device_add(QemuOpts *opts, Error **errp) { DeviceClass *dc; const char *driver, *path; DeviceState *dev; BusState *bus = NULL; Error *err = NULL; driver = qemu_opt_get(opts, "driver"); if (!driver) { error_setg(errp, QERR_MISSING_PARAMETER, "driver"); return NULL; } /* find driver */ dc = qdev_get_device_class(&driver, errp); if (!dc) { return NULL; } /* find bus */ path = qemu_opt_get(opts, "bus"); if (path != NULL) { bus = qbus_find(path, errp); if (!bus) { return NULL; } if (!object_dynamic_cast(OBJECT(bus), dc->bus_type)) { error_setg(errp, "Device '%s' can't go on %s bus", driver, object_get_typename(OBJECT(bus))); return NULL; } } else if (dc->bus_type != NULL) { bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type); if (!bus || qbus_is_full(bus)) { error_setg(errp, "No '%s' bus found for device '%s'", dc->bus_type, driver); return NULL; } } if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) { error_setg(errp, QERR_BUS_NO_HOTPLUG, bus->name); return NULL; } if (!migration_is_idle()) { error_setg(errp, "device_add not allowed while migrating"); return NULL; } /* create device */ dev = DEVICE(object_new(driver)); if (bus) { qdev_set_parent_bus(dev, bus); } qdev_set_id(dev, qemu_opts_id(opts)); /* set properties */ if (qemu_opt_foreach(opts, set_property, dev, &err)) { } dev->opts = opts; object_property_set_bool(OBJECT(dev), true, "realized", &err); if (err != NULL) { dev->opts = NULL; } return dev; err_del_dev: error_propagate(errp, err); object_unparent(OBJECT(dev)); object_unref(OBJECT(dev)); return NULL; }