2 * Dynamic device configuration and creation.
4 * Copyright (c) 2009 CodeSourcery
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.
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.
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/>.
20 /* The theory here is that it should be possible to create a machine without
21 knowledge of specific devices. Historically board init routines have
22 passed a bunch of arguments to each device, requiring the board know
23 exactly which device it is dealing with. This file provides an abstract
24 API for device configuration and initialization. Devices will generally
25 inherit from a particular bus (e.g. PCI or I2C) rather than
28 #include "qemu/osdep.h"
30 #include "sysemu/sysemu.h"
31 #include "qapi/error.h"
32 #include "qapi/qmp/qerror.h"
33 #include "qapi/visitor.h"
34 #include "qemu/error-report.h"
35 #include "qemu/option.h"
36 #include "hw/hotplug.h"
37 #include "hw/boards.h"
38 #include "hw/sysbus.h"
39 #include "qapi-event.h"
41 bool qdev_hotplug = false;
42 static bool qdev_hot_added = false;
43 bool qdev_hot_removed = false;
45 const VMStateDescription *qdev_get_vmsd(DeviceState *dev)
47 DeviceClass *dc = DEVICE_GET_CLASS(dev);
51 static void bus_remove_child(BusState *bus, DeviceState *child)
55 QTAILQ_FOREACH(kid, &bus->children, sibling) {
56 if (kid->child == child) {
59 snprintf(name, sizeof(name), "child[%d]", kid->index);
60 QTAILQ_REMOVE(&bus->children, kid, sibling);
62 /* This gives back ownership of kid->child back to us. */
63 object_property_del(OBJECT(bus), name, NULL);
64 object_unref(OBJECT(kid->child));
71 static void bus_add_child(BusState *bus, DeviceState *child)
74 BusChild *kid = g_malloc0(sizeof(*kid));
76 kid->index = bus->max_index++;
78 object_ref(OBJECT(kid->child));
80 QTAILQ_INSERT_HEAD(&bus->children, kid, sibling);
82 /* This transfers ownership of kid->child to the property. */
83 snprintf(name, sizeof(name), "child[%d]", kid->index);
84 object_property_add_link(OBJECT(bus), name,
85 object_get_typename(OBJECT(child)),
86 (Object **)&kid->child,
87 NULL, /* read-only property */
88 0, /* return ownership on prop deletion */
92 void qdev_set_parent_bus(DeviceState *dev, BusState *bus)
94 bool replugging = dev->parent_bus != NULL;
97 /* Keep a reference to the device while it's not plugged into
98 * any bus, to avoid it potentially evaporating when it is
99 * dereffed in bus_remove_child().
101 object_ref(OBJECT(dev));
102 bus_remove_child(dev->parent_bus, dev);
103 object_unref(OBJECT(dev->parent_bus));
105 dev->parent_bus = bus;
106 object_ref(OBJECT(bus));
107 bus_add_child(bus, dev);
109 object_unref(OBJECT(dev));
113 /* Create a new device. This only initializes the device state
114 structure and allows properties to be set. The device still needs
115 to be realized. See qdev-core.h. */
116 DeviceState *qdev_create(BusState *bus, const char *name)
120 dev = qdev_try_create(bus, name);
123 error_report("Unknown device '%s' for bus '%s'", name,
124 object_get_typename(OBJECT(bus)));
126 error_report("Unknown device '%s' for default sysbus", name);
134 DeviceState *qdev_try_create(BusState *bus, const char *type)
138 if (object_class_by_name(type) == NULL) {
141 dev = DEVICE(object_new(type));
147 /* Assert that the device really is a SysBusDevice before
148 * we put it onto the sysbus. Non-sysbus devices which aren't
149 * being put onto a bus should be created with object_new(TYPE_FOO),
150 * not qdev_create(NULL, TYPE_FOO).
152 g_assert(object_dynamic_cast(OBJECT(dev), TYPE_SYS_BUS_DEVICE));
153 bus = sysbus_get_default();
156 qdev_set_parent_bus(dev, bus);
157 object_unref(OBJECT(dev));
161 static QTAILQ_HEAD(device_listeners, DeviceListener) device_listeners
162 = QTAILQ_HEAD_INITIALIZER(device_listeners);
164 enum ListenerDirection { Forward, Reverse };
166 #define DEVICE_LISTENER_CALL(_callback, _direction, _args...) \
168 DeviceListener *_listener; \
170 switch (_direction) { \
172 QTAILQ_FOREACH(_listener, &device_listeners, link) { \
173 if (_listener->_callback) { \
174 _listener->_callback(_listener, ##_args); \
179 QTAILQ_FOREACH_REVERSE(_listener, &device_listeners, \
180 device_listeners, link) { \
181 if (_listener->_callback) { \
182 _listener->_callback(_listener, ##_args); \
191 static int device_listener_add(DeviceState *dev, void *opaque)
193 DEVICE_LISTENER_CALL(realize, Forward, dev);
198 void device_listener_register(DeviceListener *listener)
200 QTAILQ_INSERT_TAIL(&device_listeners, listener, link);
202 qbus_walk_children(sysbus_get_default(), NULL, NULL, device_listener_add,
206 void device_listener_unregister(DeviceListener *listener)
208 QTAILQ_REMOVE(&device_listeners, listener, link);
211 static void device_realize(DeviceState *dev, Error **errp)
213 DeviceClass *dc = DEVICE_GET_CLASS(dev);
216 int rc = dc->init(dev);
218 error_setg(errp, "Device initialization failed.");
224 static void device_unrealize(DeviceState *dev, Error **errp)
226 DeviceClass *dc = DEVICE_GET_CLASS(dev);
229 int rc = dc->exit(dev);
231 error_setg(errp, "Device exit failed.");
237 void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
238 int required_for_version)
240 assert(!dev->realized);
241 dev->instance_id_alias = alias_id;
242 dev->alias_required_for_version = required_for_version;
245 HotplugHandler *qdev_get_machine_hotplug_handler(DeviceState *dev)
247 MachineState *machine;
249 Object *m_obj = qdev_get_machine();
251 if (object_dynamic_cast(m_obj, TYPE_MACHINE)) {
252 machine = MACHINE(m_obj);
253 mc = MACHINE_GET_CLASS(machine);
254 if (mc->get_hotplug_handler) {
255 return mc->get_hotplug_handler(machine, dev);
262 HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev)
264 HotplugHandler *hotplug_ctrl;
266 if (dev->parent_bus && dev->parent_bus->hotplug_handler) {
267 hotplug_ctrl = dev->parent_bus->hotplug_handler;
269 hotplug_ctrl = qdev_get_machine_hotplug_handler(dev);
274 static int qdev_reset_one(DeviceState *dev, void *opaque)
281 static int qbus_reset_one(BusState *bus, void *opaque)
283 BusClass *bc = BUS_GET_CLASS(bus);
290 void qdev_reset_all(DeviceState *dev)
292 qdev_walk_children(dev, NULL, NULL, qdev_reset_one, qbus_reset_one, NULL);
295 void qdev_reset_all_fn(void *opaque)
297 qdev_reset_all(DEVICE(opaque));
300 void qbus_reset_all(BusState *bus)
302 qbus_walk_children(bus, NULL, NULL, qdev_reset_one, qbus_reset_one, NULL);
305 void qbus_reset_all_fn(void *opaque)
307 BusState *bus = opaque;
311 /* can be used as ->unplug() callback for the simple cases */
312 void qdev_simple_device_unplug_cb(HotplugHandler *hotplug_dev,
313 DeviceState *dev, Error **errp)
316 object_unparent(OBJECT(dev));
321 * Device properties should be set before calling this function. IRQs
322 * and MMIO regions should be connected/mapped after calling this
324 * On failure, report an error with error_report() and terminate the
325 * program. This is okay during machine creation. Don't use for
326 * hotplug, because there callers need to recover from failure.
327 * Exception: if you know the device's init() callback can't fail,
328 * then qdev_init_nofail() can't fail either, and is therefore usable
329 * even then. But relying on the device implementation that way is
330 * somewhat unclean, and best avoided.
332 void qdev_init_nofail(DeviceState *dev)
336 assert(!dev->realized);
338 object_ref(OBJECT(dev));
339 object_property_set_bool(OBJECT(dev), true, "realized", &err);
341 error_reportf_err(err, "Initialization of device %s failed: ",
342 object_get_typename(OBJECT(dev)));
345 object_unref(OBJECT(dev));
348 void qdev_machine_creation_done(void)
351 * ok, initial machine setup is done, starting from now we can
352 * only create hotpluggable devices
357 bool qdev_machine_modified(void)
359 return qdev_hot_added || qdev_hot_removed;
362 BusState *qdev_get_parent_bus(DeviceState *dev)
364 return dev->parent_bus;
367 static NamedGPIOList *qdev_get_named_gpio_list(DeviceState *dev,
372 QLIST_FOREACH(ngl, &dev->gpios, node) {
373 /* NULL is a valid and matchable name, otherwise do a normal
376 if ((!ngl->name && !name) ||
377 (name && ngl->name && strcmp(name, ngl->name) == 0)) {
382 ngl = g_malloc0(sizeof(*ngl));
383 ngl->name = g_strdup(name);
384 QLIST_INSERT_HEAD(&dev->gpios, ngl, node);
388 void qdev_init_gpio_in_named(DeviceState *dev, qemu_irq_handler handler,
389 const char *name, int n)
392 NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
394 assert(gpio_list->num_out == 0 || !name);
395 gpio_list->in = qemu_extend_irqs(gpio_list->in, gpio_list->num_in, handler,
399 name = "unnamed-gpio-in";
401 for (i = gpio_list->num_in; i < gpio_list->num_in + n; i++) {
402 gchar *propname = g_strdup_printf("%s[%u]", name, i);
404 object_property_add_child(OBJECT(dev), propname,
405 OBJECT(gpio_list->in[i]), &error_abort);
409 gpio_list->num_in += n;
412 void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n)
414 qdev_init_gpio_in_named(dev, handler, NULL, n);
417 void qdev_init_gpio_out_named(DeviceState *dev, qemu_irq *pins,
418 const char *name, int n)
421 NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
423 assert(gpio_list->num_in == 0 || !name);
426 name = "unnamed-gpio-out";
428 memset(pins, 0, sizeof(*pins) * n);
429 for (i = 0; i < n; ++i) {
430 gchar *propname = g_strdup_printf("%s[%u]", name,
431 gpio_list->num_out + i);
433 object_property_add_link(OBJECT(dev), propname, TYPE_IRQ,
435 object_property_allow_set_link,
436 OBJ_PROP_LINK_UNREF_ON_RELEASE,
440 gpio_list->num_out += n;
443 void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n)
445 qdev_init_gpio_out_named(dev, pins, NULL, n);
448 qemu_irq qdev_get_gpio_in_named(DeviceState *dev, const char *name, int n)
450 NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
452 assert(n >= 0 && n < gpio_list->num_in);
453 return gpio_list->in[n];
456 qemu_irq qdev_get_gpio_in(DeviceState *dev, int n)
458 return qdev_get_gpio_in_named(dev, NULL, n);
461 void qdev_connect_gpio_out_named(DeviceState *dev, const char *name, int n,
464 char *propname = g_strdup_printf("%s[%d]",
465 name ? name : "unnamed-gpio-out", n);
467 /* We need a name for object_property_set_link to work. If the
468 * object has a parent, object_property_add_child will come back
469 * with an error without doing anything. If it has none, it will
470 * never fail. So we can just call it with a NULL Error pointer.
472 object_property_add_child(container_get(qdev_get_machine(),
474 "non-qdev-gpio[*]", OBJECT(pin), NULL);
476 object_property_set_link(OBJECT(dev), OBJECT(pin), propname, &error_abort);
480 qemu_irq qdev_get_gpio_out_connector(DeviceState *dev, const char *name, int n)
482 char *propname = g_strdup_printf("%s[%d]",
483 name ? name : "unnamed-gpio-out", n);
485 qemu_irq ret = (qemu_irq)object_property_get_link(OBJECT(dev), propname,
491 /* disconnect a GPIO output, returning the disconnected input (if any) */
493 static qemu_irq qdev_disconnect_gpio_out_named(DeviceState *dev,
494 const char *name, int n)
496 char *propname = g_strdup_printf("%s[%d]",
497 name ? name : "unnamed-gpio-out", n);
499 qemu_irq ret = (qemu_irq)object_property_get_link(OBJECT(dev), propname,
502 object_property_set_link(OBJECT(dev), NULL, propname, NULL);
508 qemu_irq qdev_intercept_gpio_out(DeviceState *dev, qemu_irq icpt,
509 const char *name, int n)
511 qemu_irq disconnected = qdev_disconnect_gpio_out_named(dev, name, n);
512 qdev_connect_gpio_out_named(dev, name, n, icpt);
516 void qdev_connect_gpio_out(DeviceState * dev, int n, qemu_irq pin)
518 qdev_connect_gpio_out_named(dev, NULL, n, pin);
521 void qdev_pass_gpios(DeviceState *dev, DeviceState *container,
525 NamedGPIOList *ngl = qdev_get_named_gpio_list(dev, name);
527 for (i = 0; i < ngl->num_in; i++) {
528 const char *nm = ngl->name ? ngl->name : "unnamed-gpio-in";
529 char *propname = g_strdup_printf("%s[%d]", nm, i);
531 object_property_add_alias(OBJECT(container), propname,
532 OBJECT(dev), propname,
536 for (i = 0; i < ngl->num_out; i++) {
537 const char *nm = ngl->name ? ngl->name : "unnamed-gpio-out";
538 char *propname = g_strdup_printf("%s[%d]", nm, i);
540 object_property_add_alias(OBJECT(container), propname,
541 OBJECT(dev), propname,
545 QLIST_REMOVE(ngl, node);
546 QLIST_INSERT_HEAD(&container->gpios, ngl, node);
549 BusState *qdev_get_child_bus(DeviceState *dev, const char *name)
552 Object *child = object_resolve_path_component(OBJECT(dev), name);
554 bus = (BusState *)object_dynamic_cast(child, TYPE_BUS);
559 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
560 if (strcmp(name, bus->name) == 0) {
567 int qdev_walk_children(DeviceState *dev,
568 qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
569 qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
576 err = pre_devfn(dev, opaque);
582 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
583 err = qbus_walk_children(bus, pre_devfn, pre_busfn,
584 post_devfn, post_busfn, opaque);
591 err = post_devfn(dev, opaque);
600 DeviceState *qdev_find_recursive(BusState *bus, const char *id)
606 QTAILQ_FOREACH(kid, &bus->children, sibling) {
607 DeviceState *dev = kid->child;
609 if (dev->id && strcmp(dev->id, id) == 0) {
613 QLIST_FOREACH(child, &dev->child_bus, sibling) {
614 ret = qdev_find_recursive(child, id);
623 char *qdev_get_dev_path(DeviceState *dev)
627 if (!dev || !dev->parent_bus) {
631 bc = BUS_GET_CLASS(dev->parent_bus);
632 if (bc->get_dev_path) {
633 return bc->get_dev_path(dev);
640 * Legacy property handling
643 static void qdev_get_legacy_property(Object *obj, Visitor *v,
644 const char *name, void *opaque,
647 DeviceState *dev = DEVICE(obj);
648 Property *prop = opaque;
653 prop->info->print(dev, prop, buffer, sizeof(buffer));
654 visit_type_str(v, name, &ptr, errp);
658 * qdev_property_add_legacy:
659 * @dev: Device to add the property to.
660 * @prop: The qdev property definition.
661 * @errp: location to store error information.
663 * Add a legacy QOM property to @dev for qdev property @prop.
664 * On error, store error in @errp.
666 * Legacy properties are string versions of QOM properties. The format of
667 * the string depends on the property type. Legacy properties are only
668 * needed for "info qtree".
670 * Do not use this is new code! QOM Properties added through this interface
671 * will be given names in the "legacy" namespace.
673 static void qdev_property_add_legacy(DeviceState *dev, Property *prop,
678 /* Register pointer properties as legacy properties */
679 if (!prop->info->print && prop->info->get) {
683 if (prop->info->create) {
687 name = g_strdup_printf("legacy-%s", prop->name);
688 object_property_add(OBJECT(dev), name, "str",
689 prop->info->print ? qdev_get_legacy_property : prop->info->get,
698 * qdev_property_add_static:
699 * @dev: Device to add the property to.
700 * @prop: The qdev property definition.
701 * @errp: location to store error information.
703 * Add a static QOM property to @dev for qdev property @prop.
704 * On error, store error in @errp. Static properties access data in a struct.
705 * The type of the QOM property is derived from prop->info.
707 void qdev_property_add_static(DeviceState *dev, Property *prop,
710 Error *local_err = NULL;
711 Object *obj = OBJECT(dev);
713 if (prop->info->create) {
714 prop->info->create(obj, prop, &local_err);
717 * TODO qdev_prop_ptr does not have getters or setters. It must
718 * go now that it can be replaced with links. The test should be
719 * removed along with it: all static properties are read/write.
721 if (!prop->info->get && !prop->info->set) {
724 object_property_add(obj, prop->name, prop->info->name,
725 prop->info->get, prop->info->set,
731 error_propagate(errp, local_err);
735 object_property_set_description(obj, prop->name,
736 prop->info->description,
739 if (prop->set_default) {
740 prop->info->set_default_value(obj, prop);
744 /* @qdev_alias_all_properties - Add alias properties to the source object for
745 * all qdev properties on the target DeviceState.
747 void qdev_alias_all_properties(DeviceState *target, Object *source)
752 class = object_get_class(OBJECT(target));
754 DeviceClass *dc = DEVICE_CLASS(class);
756 for (prop = dc->props; prop && prop->name; prop++) {
757 object_property_add_alias(source, prop->name,
758 OBJECT(target), prop->name,
761 class = object_class_get_parent(class);
762 } while (class != object_class_by_name(TYPE_DEVICE));
765 static int qdev_add_hotpluggable_device(Object *obj, void *opaque)
767 GSList **list = opaque;
768 DeviceState *dev = (DeviceState *)object_dynamic_cast(OBJECT(obj),
775 if (dev->realized && object_property_get_bool(obj, "hotpluggable", NULL)) {
776 *list = g_slist_append(*list, dev);
782 GSList *qdev_build_hotpluggable_device_list(Object *peripheral)
786 object_child_foreach(peripheral, qdev_add_hotpluggable_device, &list);
791 static bool device_get_realized(Object *obj, Error **errp)
793 DeviceState *dev = DEVICE(obj);
794 return dev->realized;
797 static bool check_only_migratable(Object *obj, Error **err)
799 DeviceClass *dc = DEVICE_GET_CLASS(obj);
801 if (!vmstate_check_only_migratable(dc->vmsd)) {
802 error_setg(err, "Device %s is not migratable, but "
803 "--only-migratable was specified",
804 object_get_typename(obj));
811 static void device_set_realized(Object *obj, bool value, Error **errp)
813 DeviceState *dev = DEVICE(obj);
814 DeviceClass *dc = DEVICE_GET_CLASS(dev);
815 HotplugHandler *hotplug_ctrl;
817 Error *local_err = NULL;
818 bool unattached_parent = false;
819 static int unattached_count;
821 if (dev->hotplugged && !dc->hotpluggable) {
822 error_setg(errp, QERR_DEVICE_NO_HOTPLUG, object_get_typename(obj));
826 if (value && !dev->realized) {
827 if (!check_only_migratable(obj, &local_err)) {
832 gchar *name = g_strdup_printf("device[%d]", unattached_count++);
834 object_property_add_child(container_get(qdev_get_machine(),
836 name, obj, &error_abort);
837 unattached_parent = true;
841 hotplug_ctrl = qdev_get_hotplug_handler(dev);
843 hotplug_handler_pre_plug(hotplug_ctrl, dev, &local_err);
844 if (local_err != NULL) {
850 dc->realize(dev, &local_err);
853 if (local_err != NULL) {
857 DEVICE_LISTENER_CALL(realize, Forward, dev);
860 hotplug_handler_plug(hotplug_ctrl, dev, &local_err);
863 if (local_err != NULL) {
864 goto post_realize_fail;
868 * always free/re-initialize here since the value cannot be cleaned up
869 * in device_unrealize due to its usage later on in the unplug path
871 g_free(dev->canonical_path);
872 dev->canonical_path = object_get_canonical_path(OBJECT(dev));
874 if (qdev_get_vmsd(dev)) {
875 if (vmstate_register_with_alias_id(dev, -1, qdev_get_vmsd(dev), dev,
876 dev->instance_id_alias,
877 dev->alias_required_for_version,
879 goto post_realize_fail;
883 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
884 object_property_set_bool(OBJECT(bus), true, "realized",
886 if (local_err != NULL) {
887 goto child_realize_fail;
890 if (dev->hotplugged) {
893 dev->pending_deleted_event = false;
894 } else if (!value && dev->realized) {
895 Error **local_errp = NULL;
896 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
897 local_errp = local_err ? NULL : &local_err;
898 object_property_set_bool(OBJECT(bus), false, "realized",
901 if (qdev_get_vmsd(dev)) {
902 vmstate_unregister(dev, qdev_get_vmsd(dev), dev);
905 local_errp = local_err ? NULL : &local_err;
906 dc->unrealize(dev, local_errp);
908 dev->pending_deleted_event = true;
909 DEVICE_LISTENER_CALL(unrealize, Reverse, dev);
912 if (local_err != NULL) {
916 dev->realized = value;
920 QLIST_FOREACH(bus, &dev->child_bus, sibling) {
921 object_property_set_bool(OBJECT(bus), false, "realized",
925 if (qdev_get_vmsd(dev)) {
926 vmstate_unregister(dev, qdev_get_vmsd(dev), dev);
930 g_free(dev->canonical_path);
931 dev->canonical_path = NULL;
933 dc->unrealize(dev, NULL);
937 error_propagate(errp, local_err);
938 if (unattached_parent) {
939 object_unparent(OBJECT(dev));
944 static bool device_get_hotpluggable(Object *obj, Error **errp)
946 DeviceClass *dc = DEVICE_GET_CLASS(obj);
947 DeviceState *dev = DEVICE(obj);
949 return dc->hotpluggable && (dev->parent_bus == NULL ||
950 qbus_is_hotpluggable(dev->parent_bus));
953 static bool device_get_hotplugged(Object *obj, Error **err)
955 DeviceState *dev = DEVICE(obj);
957 return dev->hotplugged;
960 static void device_initfn(Object *obj)
962 DeviceState *dev = DEVICE(obj);
968 qdev_hot_added = true;
971 dev->instance_id_alias = -1;
972 dev->realized = false;
974 object_property_add_bool(obj, "realized",
975 device_get_realized, device_set_realized, NULL);
976 object_property_add_bool(obj, "hotpluggable",
977 device_get_hotpluggable, NULL, NULL);
978 object_property_add_bool(obj, "hotplugged",
979 device_get_hotplugged, NULL,
982 class = object_get_class(OBJECT(dev));
984 for (prop = DEVICE_CLASS(class)->props; prop && prop->name; prop++) {
985 qdev_property_add_legacy(dev, prop, &error_abort);
986 qdev_property_add_static(dev, prop, &error_abort);
988 class = object_class_get_parent(class);
989 } while (class != object_class_by_name(TYPE_DEVICE));
991 object_property_add_link(OBJECT(dev), "parent_bus", TYPE_BUS,
992 (Object **)&dev->parent_bus, NULL, 0,
994 QLIST_INIT(&dev->gpios);
997 static void device_post_init(Object *obj)
999 qdev_prop_set_globals(DEVICE(obj));
1002 /* Unlink device from bus and free the structure. */
1003 static void device_finalize(Object *obj)
1005 NamedGPIOList *ngl, *next;
1007 DeviceState *dev = DEVICE(obj);
1009 QLIST_FOREACH_SAFE(ngl, &dev->gpios, node, next) {
1010 QLIST_REMOVE(ngl, node);
1011 qemu_free_irqs(ngl->in, ngl->num_in);
1014 /* ngl->out irqs are owned by the other end and should not be freed
1019 /* Only send event if the device had been completely realized */
1020 if (dev->pending_deleted_event) {
1021 g_assert(dev->canonical_path);
1023 qapi_event_send_device_deleted(!!dev->id, dev->id, dev->canonical_path,
1025 g_free(dev->canonical_path);
1026 dev->canonical_path = NULL;
1029 qemu_opts_del(dev->opts);
1032 static void device_class_base_init(ObjectClass *class, void *data)
1034 DeviceClass *klass = DEVICE_CLASS(class);
1036 /* We explicitly look up properties in the superclasses,
1037 * so do not propagate them to the subclasses.
1039 klass->props = NULL;
1042 static void device_unparent(Object *obj)
1044 DeviceState *dev = DEVICE(obj);
1047 if (dev->realized) {
1048 object_property_set_bool(obj, false, "realized", NULL);
1050 while (dev->num_child_bus) {
1051 bus = QLIST_FIRST(&dev->child_bus);
1052 object_unparent(OBJECT(bus));
1054 if (dev->parent_bus) {
1055 bus_remove_child(dev->parent_bus, dev);
1056 object_unref(OBJECT(dev->parent_bus));
1057 dev->parent_bus = NULL;
1061 static void device_class_init(ObjectClass *class, void *data)
1063 DeviceClass *dc = DEVICE_CLASS(class);
1065 class->unparent = device_unparent;
1066 dc->realize = device_realize;
1067 dc->unrealize = device_unrealize;
1069 /* by default all devices were considered as hotpluggable,
1070 * so with intent to check it in generic qdev_unplug() /
1071 * device_set_realized() functions make every device
1072 * hotpluggable. Devices that shouldn't be hotpluggable,
1073 * should override it in their class_init()
1075 dc->hotpluggable = true;
1076 dc->user_creatable = true;
1079 void device_class_set_parent_reset(DeviceClass *dc,
1080 DeviceReset dev_reset,
1081 DeviceReset *parent_reset)
1083 *parent_reset = dc->reset;
1084 dc->reset = dev_reset;
1087 void device_class_set_parent_realize(DeviceClass *dc,
1088 DeviceRealize dev_realize,
1089 DeviceRealize *parent_realize)
1091 *parent_realize = dc->realize;
1092 dc->realize = dev_realize;
1095 void device_class_set_parent_unrealize(DeviceClass *dc,
1096 DeviceUnrealize dev_unrealize,
1097 DeviceUnrealize *parent_unrealize)
1099 *parent_unrealize = dc->unrealize;
1100 dc->unrealize = dev_unrealize;
1103 void device_reset(DeviceState *dev)
1105 DeviceClass *klass = DEVICE_GET_CLASS(dev);
1112 Object *qdev_get_machine(void)
1117 dev = container_get(object_get_root(), "/machine");
1123 static const TypeInfo device_type_info = {
1124 .name = TYPE_DEVICE,
1125 .parent = TYPE_OBJECT,
1126 .instance_size = sizeof(DeviceState),
1127 .instance_init = device_initfn,
1128 .instance_post_init = device_post_init,
1129 .instance_finalize = device_finalize,
1130 .class_base_init = device_class_base_init,
1131 .class_init = device_class_init,
1133 .class_size = sizeof(DeviceClass),
1136 static void qdev_register_types(void)
1138 type_register_static(&device_type_info);
1141 type_init(qdev_register_types)