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/*
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* Dynamic device configuration and creation.
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*
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* Copyright (c) 2009 CodeSourcery
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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/* The theory here is that it should be possible to create a machine without
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knowledge of specific devices. Historically board init routines have
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passed a bunch of arguments to each device, requiring the board know
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exactly which device it is dealing with. This file provides an abstract
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API for device configuration and initialization. Devices will generally
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inherit from a particular bus (e.g. PCI or I2C) rather than
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this API directly. */
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#include "net.h" |
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#include "qdev.h" |
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#include "sysemu.h" |
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#include "monitor.h" |
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#include "qerror.h" |
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static int qdev_hotplug = 0; |
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/* This is a nasty hack to allow passing a NULL bus to qdev_create. */
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static BusState *main_system_bus;
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DeviceInfo *device_info_list; |
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static BusState *qbus_find_recursive(BusState *bus, const char *name, |
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const BusInfo *info);
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static BusState *qbus_find(const char *path); |
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/* Register a new device type. */
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void qdev_register(DeviceInfo *info)
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{ |
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assert(info->size >= sizeof(DeviceState));
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assert(!info->next); |
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info->next = device_info_list; |
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device_info_list = info; |
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} |
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static DeviceInfo *qdev_find_info(BusInfo *bus_info, const char *name) |
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{ |
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DeviceInfo *info; |
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/* first check device names */
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for (info = device_info_list; info != NULL; info = info->next) { |
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if (bus_info && info->bus_info != bus_info)
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continue;
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if (strcmp(info->name, name) != 0) |
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continue;
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return info;
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} |
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/* failing that check the aliases */
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for (info = device_info_list; info != NULL; info = info->next) { |
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if (bus_info && info->bus_info != bus_info)
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continue;
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if (!info->alias)
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continue;
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if (strcmp(info->alias, name) != 0) |
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continue;
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return info;
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} |
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return NULL; |
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} |
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/* Create a new device. This only initializes the device state structure
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and allows properties to be set. qdev_init should be called to
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initialize the actual device emulation. */
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DeviceState *qdev_create(BusState *bus, const char *name) |
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{ |
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DeviceInfo *info; |
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DeviceState *dev; |
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if (!bus) {
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if (!main_system_bus) {
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main_system_bus = qbus_create(&system_bus_info, NULL, "main-system-bus"); |
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} |
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bus = main_system_bus; |
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} |
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info = qdev_find_info(bus->info, name); |
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if (!info) {
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hw_error("Unknown device '%s' for bus '%s'\n", name, bus->info->name);
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} |
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dev = qemu_mallocz(info->size); |
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dev->info = info; |
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dev->parent_bus = bus; |
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qdev_prop_set_defaults(dev, dev->info->props); |
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qdev_prop_set_defaults(dev, dev->parent_bus->info->props); |
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qdev_prop_set_globals(dev); |
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QLIST_INSERT_HEAD(&bus->children, dev, sibling); |
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if (qdev_hotplug) {
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assert(bus->allow_hotplug); |
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dev->hotplugged = 1;
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} |
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dev->state = DEV_STATE_CREATED; |
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return dev;
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} |
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static void qdev_print_devinfo(DeviceInfo *info) |
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{ |
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error_printf("name \"%s\", bus %s",
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info->name, info->bus_info->name); |
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if (info->alias) {
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error_printf(", alias \"%s\"", info->alias);
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} |
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if (info->desc) {
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error_printf(", desc \"%s\"", info->desc);
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} |
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if (info->no_user) {
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error_printf(", no-user");
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} |
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error_printf("\n");
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} |
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static int set_property(const char *name, const char *value, void *opaque) |
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{ |
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DeviceState *dev = opaque; |
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if (strcmp(name, "driver") == 0) |
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return 0; |
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if (strcmp(name, "bus") == 0) |
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return 0; |
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if (qdev_prop_parse(dev, name, value) == -1) { |
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error_report("can't set property \"%s\" to \"%s\" for \"%s\"",
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name, value, dev->info->name); |
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return -1; |
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} |
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return 0; |
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} |
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int qdev_device_help(QemuOpts *opts)
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{ |
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const char *driver; |
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DeviceInfo *info; |
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Property *prop; |
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driver = qemu_opt_get(opts, "driver");
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if (driver && !strcmp(driver, "?")) { |
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for (info = device_info_list; info != NULL; info = info->next) { |
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qdev_print_devinfo(info); |
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} |
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return 1; |
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} |
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if (!qemu_opt_get(opts, "?")) { |
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return 0; |
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} |
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info = qdev_find_info(NULL, driver);
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if (!info) {
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return 0; |
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} |
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for (prop = info->props; prop && prop->name; prop++) {
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error_printf("%s.%s=%s\n", info->name, prop->name, prop->info->name);
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} |
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return 1; |
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} |
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DeviceState *qdev_device_add(QemuOpts *opts) |
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{ |
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const char *driver, *path, *id; |
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DeviceInfo *info; |
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DeviceState *qdev; |
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BusState *bus; |
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driver = qemu_opt_get(opts, "driver");
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if (!driver) {
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error_report("-device: no driver specified");
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return NULL; |
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} |
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/* find driver */
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info = qdev_find_info(NULL, driver);
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if (!info) {
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qemu_error_new(QERR_DEVICE_NOT_FOUND, driver); |
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return NULL; |
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} |
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if (info->no_user) {
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error_report("device \"%s\" can't be added via command line",
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info->name); |
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return NULL; |
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} |
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/* find bus */
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path = qemu_opt_get(opts, "bus");
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if (path != NULL) { |
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bus = qbus_find(path); |
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} else {
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bus = qbus_find_recursive(main_system_bus, NULL, info->bus_info);
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} |
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if (!bus) {
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error_report("Did not find %s bus for %s",
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path ? path : info->bus_info->name, info->name); |
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return NULL; |
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} |
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if (qdev_hotplug && !bus->allow_hotplug) {
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error_report("Bus %s does not support hotplugging",
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bus->name); |
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return NULL; |
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} |
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/* create device, set properties */
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qdev = qdev_create(bus, driver); |
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id = qemu_opts_id(opts); |
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if (id) {
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qdev->id = id; |
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} |
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if (qemu_opt_foreach(opts, set_property, qdev, 1) != 0) { |
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qdev_free(qdev); |
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return NULL; |
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} |
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if (qdev_init(qdev) < 0) { |
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error_report("Error initializing device %s", driver);
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return NULL; |
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} |
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qdev->opts = opts; |
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return qdev;
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} |
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static void qdev_reset(void *opaque) |
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{ |
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DeviceState *dev = opaque; |
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if (dev->info->reset)
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dev->info->reset(dev); |
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} |
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/* Initialize a device. Device properties should be set before calling
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this function. IRQs and MMIO regions should be connected/mapped after
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calling this function.
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On failure, destroy the device and return negative value.
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Return 0 on success. */
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int qdev_init(DeviceState *dev)
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{ |
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int rc;
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assert(dev->state == DEV_STATE_CREATED); |
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rc = dev->info->init(dev, dev->info); |
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if (rc < 0) { |
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qdev_free(dev); |
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return rc;
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} |
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qemu_register_reset(qdev_reset, dev); |
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if (dev->info->vmsd)
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vmstate_register(-1, dev->info->vmsd, dev);
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dev->state = DEV_STATE_INITIALIZED; |
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return 0; |
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} |
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int qdev_unplug(DeviceState *dev)
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{ |
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if (!dev->parent_bus->allow_hotplug) {
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error_report("Bus %s does not support hotplugging",
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dev->parent_bus->name); |
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return -1; |
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} |
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assert(dev->info->unplug != NULL);
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return dev->info->unplug(dev);
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} |
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/* can be used as ->unplug() callback for the simple cases */
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int qdev_simple_unplug_cb(DeviceState *dev)
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{ |
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/* just zap it */
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qdev_free(dev); |
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return 0; |
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} |
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/* Like qdev_init(), but terminate program via hw_error() instead of
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returning an error value. This is okay during machine creation.
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Don't use for hotplug, because there callers need to recover from
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failure. Exception: if you know the device's init() callback can't
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fail, then qdev_init_nofail() can't fail either, and is therefore
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usable even then. But relying on the device implementation that
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way is somewhat unclean, and best avoided. */
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void qdev_init_nofail(DeviceState *dev)
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{ |
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DeviceInfo *info = dev->info; |
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if (qdev_init(dev) < 0) |
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hw_error("Initialization of device %s failed\n", info->name);
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} |
302 |
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/* Unlink device from bus and free the structure. */
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void qdev_free(DeviceState *dev)
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{ |
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BusState *bus; |
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if (dev->state == DEV_STATE_INITIALIZED) {
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while (dev->num_child_bus) {
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bus = QLIST_FIRST(&dev->child_bus); |
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qbus_free(bus); |
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} |
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if (dev->info->vmsd)
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vmstate_unregister(dev->info->vmsd, dev); |
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if (dev->info->exit)
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dev->info->exit(dev); |
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if (dev->opts)
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qemu_opts_del(dev->opts); |
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} |
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qemu_unregister_reset(qdev_reset, dev); |
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QLIST_REMOVE(dev, sibling); |
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qemu_free(dev); |
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} |
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void qdev_machine_creation_done(void) |
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{ |
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/*
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* ok, initial machine setup is done, starting from now we can
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* only create hotpluggable devices
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*/
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qdev_hotplug = 1;
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} |
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/* Get a character (serial) device interface. */
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CharDriverState *qdev_init_chardev(DeviceState *dev) |
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{ |
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static int next_serial; |
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/* FIXME: This function needs to go away: use chardev properties! */
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return serial_hds[next_serial++];
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} |
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BusState *qdev_get_parent_bus(DeviceState *dev) |
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{ |
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return dev->parent_bus;
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} |
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void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n) |
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{ |
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assert(dev->num_gpio_in == 0);
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dev->num_gpio_in = n; |
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dev->gpio_in = qemu_allocate_irqs(handler, dev, n); |
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} |
354 |
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void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n) |
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{ |
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assert(dev->num_gpio_out == 0);
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dev->num_gpio_out = n; |
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dev->gpio_out = pins; |
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} |
361 |
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qemu_irq qdev_get_gpio_in(DeviceState *dev, int n)
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{ |
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assert(n >= 0 && n < dev->num_gpio_in);
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return dev->gpio_in[n];
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} |
367 |
|
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void qdev_connect_gpio_out(DeviceState * dev, int n, qemu_irq pin) |
369 |
{ |
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assert(n >= 0 && n < dev->num_gpio_out);
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dev->gpio_out[n] = pin; |
372 |
} |
373 |
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void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd)
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{ |
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qdev_prop_set_macaddr(dev, "mac", nd->macaddr);
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if (nd->vlan)
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qdev_prop_set_vlan(dev, "vlan", nd->vlan);
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if (nd->netdev)
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qdev_prop_set_netdev(dev, "netdev", nd->netdev);
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if (nd->nvectors != DEV_NVECTORS_UNSPECIFIED &&
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qdev_prop_exists(dev, "vectors")) {
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qdev_prop_set_uint32(dev, "vectors", nd->nvectors);
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} |
385 |
} |
386 |
|
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static int next_block_unit[IF_COUNT]; |
388 |
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/* Get a block device. This should only be used for single-drive devices
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(e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
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appropriate bus. */
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BlockDriverState *qdev_init_bdrv(DeviceState *dev, BlockInterfaceType type) |
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{ |
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int unit = next_block_unit[type]++;
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DriveInfo *dinfo; |
396 |
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dinfo = drive_get(type, 0, unit);
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return dinfo ? dinfo->bdrv : NULL; |
399 |
} |
400 |
|
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BusState *qdev_get_child_bus(DeviceState *dev, const char *name) |
402 |
{ |
403 |
BusState *bus; |
404 |
|
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QLIST_FOREACH(bus, &dev->child_bus, sibling) { |
406 |
if (strcmp(name, bus->name) == 0) { |
407 |
return bus;
|
408 |
} |
409 |
} |
410 |
return NULL; |
411 |
} |
412 |
|
413 |
static BusState *qbus_find_recursive(BusState *bus, const char *name, |
414 |
const BusInfo *info)
|
415 |
{ |
416 |
DeviceState *dev; |
417 |
BusState *child, *ret; |
418 |
int match = 1; |
419 |
|
420 |
if (name && (strcmp(bus->name, name) != 0)) { |
421 |
match = 0;
|
422 |
} |
423 |
if (info && (bus->info != info)) {
|
424 |
match = 0;
|
425 |
} |
426 |
if (match) {
|
427 |
return bus;
|
428 |
} |
429 |
|
430 |
QLIST_FOREACH(dev, &bus->children, sibling) { |
431 |
QLIST_FOREACH(child, &dev->child_bus, sibling) { |
432 |
ret = qbus_find_recursive(child, name, info); |
433 |
if (ret) {
|
434 |
return ret;
|
435 |
} |
436 |
} |
437 |
} |
438 |
return NULL; |
439 |
} |
440 |
|
441 |
static DeviceState *qdev_find_recursive(BusState *bus, const char *id) |
442 |
{ |
443 |
DeviceState *dev, *ret; |
444 |
BusState *child; |
445 |
|
446 |
QLIST_FOREACH(dev, &bus->children, sibling) { |
447 |
if (dev->id && strcmp(dev->id, id) == 0) |
448 |
return dev;
|
449 |
QLIST_FOREACH(child, &dev->child_bus, sibling) { |
450 |
ret = qdev_find_recursive(child, id); |
451 |
if (ret) {
|
452 |
return ret;
|
453 |
} |
454 |
} |
455 |
} |
456 |
return NULL; |
457 |
} |
458 |
|
459 |
static void qbus_list_bus(DeviceState *dev) |
460 |
{ |
461 |
BusState *child; |
462 |
const char *sep = " "; |
463 |
|
464 |
error_printf("child busses at \"%s\":",
|
465 |
dev->id ? dev->id : dev->info->name); |
466 |
QLIST_FOREACH(child, &dev->child_bus, sibling) { |
467 |
error_printf("%s\"%s\"", sep, child->name);
|
468 |
sep = ", ";
|
469 |
} |
470 |
error_printf("\n");
|
471 |
} |
472 |
|
473 |
static void qbus_list_dev(BusState *bus) |
474 |
{ |
475 |
DeviceState *dev; |
476 |
const char *sep = " "; |
477 |
|
478 |
error_printf("devices at \"%s\":", bus->name);
|
479 |
QLIST_FOREACH(dev, &bus->children, sibling) { |
480 |
error_printf("%s\"%s\"", sep, dev->info->name);
|
481 |
if (dev->id)
|
482 |
error_printf("/\"%s\"", dev->id);
|
483 |
sep = ", ";
|
484 |
} |
485 |
error_printf("\n");
|
486 |
} |
487 |
|
488 |
static BusState *qbus_find_bus(DeviceState *dev, char *elem) |
489 |
{ |
490 |
BusState *child; |
491 |
|
492 |
QLIST_FOREACH(child, &dev->child_bus, sibling) { |
493 |
if (strcmp(child->name, elem) == 0) { |
494 |
return child;
|
495 |
} |
496 |
} |
497 |
return NULL; |
498 |
} |
499 |
|
500 |
static DeviceState *qbus_find_dev(BusState *bus, char *elem) |
501 |
{ |
502 |
DeviceState *dev; |
503 |
|
504 |
/*
|
505 |
* try to match in order:
|
506 |
* (1) instance id, if present
|
507 |
* (2) driver name
|
508 |
* (3) driver alias, if present
|
509 |
*/
|
510 |
QLIST_FOREACH(dev, &bus->children, sibling) { |
511 |
if (dev->id && strcmp(dev->id, elem) == 0) { |
512 |
return dev;
|
513 |
} |
514 |
} |
515 |
QLIST_FOREACH(dev, &bus->children, sibling) { |
516 |
if (strcmp(dev->info->name, elem) == 0) { |
517 |
return dev;
|
518 |
} |
519 |
} |
520 |
QLIST_FOREACH(dev, &bus->children, sibling) { |
521 |
if (dev->info->alias && strcmp(dev->info->alias, elem) == 0) { |
522 |
return dev;
|
523 |
} |
524 |
} |
525 |
return NULL; |
526 |
} |
527 |
|
528 |
static BusState *qbus_find(const char *path) |
529 |
{ |
530 |
DeviceState *dev; |
531 |
BusState *bus; |
532 |
char elem[128]; |
533 |
int pos, len;
|
534 |
|
535 |
/* find start element */
|
536 |
if (path[0] == '/') { |
537 |
bus = main_system_bus; |
538 |
pos = 0;
|
539 |
} else {
|
540 |
if (sscanf(path, "%127[^/]%n", elem, &len) != 1) { |
541 |
error_report("path parse error (\"%s\")", path);
|
542 |
return NULL; |
543 |
} |
544 |
bus = qbus_find_recursive(main_system_bus, elem, NULL);
|
545 |
if (!bus) {
|
546 |
error_report("bus \"%s\" not found", elem);
|
547 |
return NULL; |
548 |
} |
549 |
pos = len; |
550 |
} |
551 |
|
552 |
for (;;) {
|
553 |
if (path[pos] == '\0') { |
554 |
/* we are done */
|
555 |
return bus;
|
556 |
} |
557 |
|
558 |
/* find device */
|
559 |
if (sscanf(path+pos, "/%127[^/]%n", elem, &len) != 1) { |
560 |
error_report("path parse error (\"%s\" pos %d)", path, pos);
|
561 |
return NULL; |
562 |
} |
563 |
pos += len; |
564 |
dev = qbus_find_dev(bus, elem); |
565 |
if (!dev) {
|
566 |
error_report("device \"%s\" not found", elem);
|
567 |
qbus_list_dev(bus); |
568 |
return NULL; |
569 |
} |
570 |
if (path[pos] == '\0') { |
571 |
/* last specified element is a device. If it has exactly
|
572 |
* one child bus accept it nevertheless */
|
573 |
switch (dev->num_child_bus) {
|
574 |
case 0: |
575 |
error_report("device has no child bus (%s)", path);
|
576 |
return NULL; |
577 |
case 1: |
578 |
return QLIST_FIRST(&dev->child_bus);
|
579 |
default:
|
580 |
error_report("device has multiple child busses (%s)", path);
|
581 |
qbus_list_bus(dev); |
582 |
return NULL; |
583 |
} |
584 |
} |
585 |
|
586 |
/* find bus */
|
587 |
if (sscanf(path+pos, "/%127[^/]%n", elem, &len) != 1) { |
588 |
error_report("path parse error (\"%s\" pos %d)", path, pos);
|
589 |
return NULL; |
590 |
} |
591 |
pos += len; |
592 |
bus = qbus_find_bus(dev, elem); |
593 |
if (!bus) {
|
594 |
error_report("child bus \"%s\" not found", elem);
|
595 |
qbus_list_bus(dev); |
596 |
return NULL; |
597 |
} |
598 |
} |
599 |
} |
600 |
|
601 |
void qbus_create_inplace(BusState *bus, BusInfo *info,
|
602 |
DeviceState *parent, const char *name) |
603 |
{ |
604 |
char *buf;
|
605 |
int i,len;
|
606 |
|
607 |
bus->info = info; |
608 |
bus->parent = parent; |
609 |
|
610 |
if (name) {
|
611 |
/* use supplied name */
|
612 |
bus->name = qemu_strdup(name); |
613 |
} else if (parent && parent->id) { |
614 |
/* parent device has id -> use it for bus name */
|
615 |
len = strlen(parent->id) + 16;
|
616 |
buf = qemu_malloc(len); |
617 |
snprintf(buf, len, "%s.%d", parent->id, parent->num_child_bus);
|
618 |
bus->name = buf; |
619 |
} else {
|
620 |
/* no id -> use lowercase bus type for bus name */
|
621 |
len = strlen(info->name) + 16;
|
622 |
buf = qemu_malloc(len); |
623 |
len = snprintf(buf, len, "%s.%d", info->name,
|
624 |
parent ? parent->num_child_bus : 0);
|
625 |
for (i = 0; i < len; i++) |
626 |
buf[i] = qemu_tolower(buf[i]); |
627 |
bus->name = buf; |
628 |
} |
629 |
|
630 |
QLIST_INIT(&bus->children); |
631 |
if (parent) {
|
632 |
QLIST_INSERT_HEAD(&parent->child_bus, bus, sibling); |
633 |
parent->num_child_bus++; |
634 |
} |
635 |
|
636 |
} |
637 |
|
638 |
BusState *qbus_create(BusInfo *info, DeviceState *parent, const char *name) |
639 |
{ |
640 |
BusState *bus; |
641 |
|
642 |
bus = qemu_mallocz(info->size); |
643 |
bus->qdev_allocated = 1;
|
644 |
qbus_create_inplace(bus, info, parent, name); |
645 |
return bus;
|
646 |
} |
647 |
|
648 |
void qbus_free(BusState *bus)
|
649 |
{ |
650 |
DeviceState *dev; |
651 |
|
652 |
while ((dev = QLIST_FIRST(&bus->children)) != NULL) { |
653 |
qdev_free(dev); |
654 |
} |
655 |
if (bus->parent) {
|
656 |
QLIST_REMOVE(bus, sibling); |
657 |
bus->parent->num_child_bus--; |
658 |
} |
659 |
if (bus->qdev_allocated) {
|
660 |
qemu_free(bus); |
661 |
} |
662 |
} |
663 |
|
664 |
#define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__) |
665 |
static void qbus_print(Monitor *mon, BusState *bus, int indent); |
666 |
|
667 |
static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props, |
668 |
const char *prefix, int indent) |
669 |
{ |
670 |
char buf[64]; |
671 |
|
672 |
if (!props)
|
673 |
return;
|
674 |
while (props->name) {
|
675 |
if (props->info->print) {
|
676 |
props->info->print(dev, props, buf, sizeof(buf));
|
677 |
qdev_printf("%s-prop: %s = %s\n", prefix, props->name, buf);
|
678 |
} |
679 |
props++; |
680 |
} |
681 |
} |
682 |
|
683 |
static void qdev_print(Monitor *mon, DeviceState *dev, int indent) |
684 |
{ |
685 |
BusState *child; |
686 |
qdev_printf("dev: %s, id \"%s\"\n", dev->info->name,
|
687 |
dev->id ? dev->id : "");
|
688 |
indent += 2;
|
689 |
if (dev->num_gpio_in) {
|
690 |
qdev_printf("gpio-in %d\n", dev->num_gpio_in);
|
691 |
} |
692 |
if (dev->num_gpio_out) {
|
693 |
qdev_printf("gpio-out %d\n", dev->num_gpio_out);
|
694 |
} |
695 |
qdev_print_props(mon, dev, dev->info->props, "dev", indent);
|
696 |
qdev_print_props(mon, dev, dev->parent_bus->info->props, "bus", indent);
|
697 |
if (dev->parent_bus->info->print_dev)
|
698 |
dev->parent_bus->info->print_dev(mon, dev, indent); |
699 |
QLIST_FOREACH(child, &dev->child_bus, sibling) { |
700 |
qbus_print(mon, child, indent); |
701 |
} |
702 |
} |
703 |
|
704 |
static void qbus_print(Monitor *mon, BusState *bus, int indent) |
705 |
{ |
706 |
struct DeviceState *dev;
|
707 |
|
708 |
qdev_printf("bus: %s\n", bus->name);
|
709 |
indent += 2;
|
710 |
qdev_printf("type %s\n", bus->info->name);
|
711 |
QLIST_FOREACH(dev, &bus->children, sibling) { |
712 |
qdev_print(mon, dev, indent); |
713 |
} |
714 |
} |
715 |
#undef qdev_printf
|
716 |
|
717 |
void do_info_qtree(Monitor *mon)
|
718 |
{ |
719 |
if (main_system_bus)
|
720 |
qbus_print(mon, main_system_bus, 0);
|
721 |
} |
722 |
|
723 |
void do_info_qdm(Monitor *mon)
|
724 |
{ |
725 |
DeviceInfo *info; |
726 |
|
727 |
for (info = device_info_list; info != NULL; info = info->next) { |
728 |
qdev_print_devinfo(info); |
729 |
} |
730 |
} |
731 |
|
732 |
void do_device_add(Monitor *mon, const QDict *qdict) |
733 |
{ |
734 |
QemuOpts *opts; |
735 |
|
736 |
opts = qemu_opts_parse(&qemu_device_opts, |
737 |
qdict_get_str(qdict, "config"), "driver"); |
738 |
if (opts) {
|
739 |
if (qdev_device_help(opts) || qdev_device_add(opts) == NULL) { |
740 |
qemu_opts_del(opts); |
741 |
} |
742 |
} |
743 |
} |
744 |
|
745 |
void do_device_del(Monitor *mon, const QDict *qdict) |
746 |
{ |
747 |
const char *id = qdict_get_str(qdict, "id"); |
748 |
DeviceState *dev; |
749 |
|
750 |
dev = qdev_find_recursive(main_system_bus, id); |
751 |
if (NULL == dev) { |
752 |
error_report("Device '%s' not found", id);
|
753 |
return;
|
754 |
} |
755 |
qdev_unplug(dev); |
756 |
} |