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 "hw/fw-path-provider.h"
31 #include "sysemu/sysemu.h"
32 #include "qapi/qmp/qerror.h"
33 #include "qapi/visitor.h"
34 #include "qapi/qmp/qjson.h"
35 #include "qemu/error-report.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 const char *qdev_fw_name(DeviceState
*dev
)
53 DeviceClass
*dc
= DEVICE_GET_CLASS(dev
);
59 return object_get_typename(OBJECT(dev
));
62 static void bus_remove_child(BusState
*bus
, DeviceState
*child
)
66 QTAILQ_FOREACH(kid
, &bus
->children
, sibling
) {
67 if (kid
->child
== child
) {
70 snprintf(name
, sizeof(name
), "child[%d]", kid
->index
);
71 QTAILQ_REMOVE(&bus
->children
, kid
, sibling
);
73 /* This gives back ownership of kid->child back to us. */
74 object_property_del(OBJECT(bus
), name
, NULL
);
75 object_unref(OBJECT(kid
->child
));
82 static void bus_add_child(BusState
*bus
, DeviceState
*child
)
85 BusChild
*kid
= g_malloc0(sizeof(*kid
));
87 kid
->index
= bus
->max_index
++;
89 object_ref(OBJECT(kid
->child
));
91 QTAILQ_INSERT_HEAD(&bus
->children
, kid
, sibling
);
93 /* This transfers ownership of kid->child to the property. */
94 snprintf(name
, sizeof(name
), "child[%d]", kid
->index
);
95 object_property_add_link(OBJECT(bus
), name
,
96 object_get_typename(OBJECT(child
)),
97 (Object
**)&kid
->child
,
98 NULL
, /* read-only property */
99 0, /* return ownership on prop deletion */
103 void qdev_set_parent_bus(DeviceState
*dev
, BusState
*bus
)
105 bool replugging
= dev
->parent_bus
!= NULL
;
108 /* Keep a reference to the device while it's not plugged into
109 * any bus, to avoid it potentially evaporating when it is
110 * dereffed in bus_remove_child().
112 object_ref(OBJECT(dev
));
113 bus_remove_child(dev
->parent_bus
, dev
);
114 object_unref(OBJECT(dev
->parent_bus
));
116 dev
->parent_bus
= bus
;
117 object_ref(OBJECT(bus
));
118 bus_add_child(bus
, dev
);
120 object_unref(OBJECT(dev
));
124 /* Create a new device. This only initializes the device state
125 structure and allows properties to be set. The device still needs
126 to be realized. See qdev-core.h. */
127 DeviceState
*qdev_create(BusState
*bus
, const char *name
)
131 dev
= qdev_try_create(bus
, name
);
134 error_report("Unknown device '%s' for bus '%s'", name
,
135 object_get_typename(OBJECT(bus
)));
137 error_report("Unknown device '%s' for default sysbus", name
);
145 DeviceState
*qdev_try_create(BusState
*bus
, const char *type
)
149 if (object_class_by_name(type
) == NULL
) {
152 dev
= DEVICE(object_new(type
));
158 /* Assert that the device really is a SysBusDevice before
159 * we put it onto the sysbus. Non-sysbus devices which aren't
160 * being put onto a bus should be created with object_new(TYPE_FOO),
161 * not qdev_create(NULL, TYPE_FOO).
163 g_assert(object_dynamic_cast(OBJECT(dev
), TYPE_SYS_BUS_DEVICE
));
164 bus
= sysbus_get_default();
167 qdev_set_parent_bus(dev
, bus
);
168 object_unref(OBJECT(dev
));
172 static QTAILQ_HEAD(device_listeners
, DeviceListener
) device_listeners
173 = QTAILQ_HEAD_INITIALIZER(device_listeners
);
175 enum ListenerDirection
{ Forward
, Reverse
};
177 #define DEVICE_LISTENER_CALL(_callback, _direction, _args...) \
179 DeviceListener *_listener; \
181 switch (_direction) { \
183 QTAILQ_FOREACH(_listener, &device_listeners, link) { \
184 if (_listener->_callback) { \
185 _listener->_callback(_listener, ##_args); \
190 QTAILQ_FOREACH_REVERSE(_listener, &device_listeners, \
191 device_listeners, link) { \
192 if (_listener->_callback) { \
193 _listener->_callback(_listener, ##_args); \
202 static int device_listener_add(DeviceState
*dev
, void *opaque
)
204 DEVICE_LISTENER_CALL(realize
, Forward
, dev
);
209 void device_listener_register(DeviceListener
*listener
)
211 QTAILQ_INSERT_TAIL(&device_listeners
, listener
, link
);
213 qbus_walk_children(sysbus_get_default(), NULL
, NULL
, device_listener_add
,
217 void device_listener_unregister(DeviceListener
*listener
)
219 QTAILQ_REMOVE(&device_listeners
, listener
, link
);
222 static void device_realize(DeviceState
*dev
, Error
**errp
)
224 DeviceClass
*dc
= DEVICE_GET_CLASS(dev
);
227 int rc
= dc
->init(dev
);
229 error_setg(errp
, "Device initialization failed.");
235 static void device_unrealize(DeviceState
*dev
, Error
**errp
)
237 DeviceClass
*dc
= DEVICE_GET_CLASS(dev
);
240 int rc
= dc
->exit(dev
);
242 error_setg(errp
, "Device exit failed.");
248 void qdev_set_legacy_instance_id(DeviceState
*dev
, int alias_id
,
249 int required_for_version
)
251 assert(!dev
->realized
);
252 dev
->instance_id_alias
= alias_id
;
253 dev
->alias_required_for_version
= required_for_version
;
256 HotplugHandler
*qdev_get_hotplug_handler(DeviceState
*dev
)
258 HotplugHandler
*hotplug_ctrl
= NULL
;
260 if (dev
->parent_bus
&& dev
->parent_bus
->hotplug_handler
) {
261 hotplug_ctrl
= dev
->parent_bus
->hotplug_handler
;
262 } else if (object_dynamic_cast(qdev_get_machine(), TYPE_MACHINE
)) {
263 MachineState
*machine
= MACHINE(qdev_get_machine());
264 MachineClass
*mc
= MACHINE_GET_CLASS(machine
);
266 if (mc
->get_hotplug_handler
) {
267 hotplug_ctrl
= mc
->get_hotplug_handler(machine
, dev
);
273 static int qdev_reset_one(DeviceState
*dev
, void *opaque
)
280 static int qbus_reset_one(BusState
*bus
, void *opaque
)
282 BusClass
*bc
= BUS_GET_CLASS(bus
);
289 void qdev_reset_all(DeviceState
*dev
)
291 qdev_walk_children(dev
, NULL
, NULL
, qdev_reset_one
, qbus_reset_one
, NULL
);
294 void qdev_reset_all_fn(void *opaque
)
296 qdev_reset_all(DEVICE(opaque
));
299 void qbus_reset_all(BusState
*bus
)
301 qbus_walk_children(bus
, NULL
, NULL
, qdev_reset_one
, qbus_reset_one
, NULL
);
304 void qbus_reset_all_fn(void *opaque
)
306 BusState
*bus
= opaque
;
310 /* can be used as ->unplug() callback for the simple cases */
311 void qdev_simple_device_unplug_cb(HotplugHandler
*hotplug_dev
,
312 DeviceState
*dev
, Error
**errp
)
315 object_unparent(OBJECT(dev
));
320 * Device properties should be set before calling this function. IRQs
321 * and MMIO regions should be connected/mapped after calling this
323 * On failure, report an error with error_report() and terminate the
324 * program. This is okay during machine creation. Don't use for
325 * hotplug, because there callers need to recover from failure.
326 * Exception: if you know the device's init() callback can't fail,
327 * then qdev_init_nofail() can't fail either, and is therefore usable
328 * even then. But relying on the device implementation that way is
329 * somewhat unclean, and best avoided.
331 void qdev_init_nofail(DeviceState
*dev
)
335 assert(!dev
->realized
);
337 object_ref(OBJECT(dev
));
338 object_property_set_bool(OBJECT(dev
), true, "realized", &err
);
340 error_reportf_err(err
, "Initialization of device %s failed: ",
341 object_get_typename(OBJECT(dev
)));
344 object_unref(OBJECT(dev
));
347 void qdev_machine_creation_done(void)
350 * ok, initial machine setup is done, starting from now we can
351 * only create hotpluggable devices
356 bool qdev_machine_modified(void)
358 return qdev_hot_added
|| qdev_hot_removed
;
361 BusState
*qdev_get_parent_bus(DeviceState
*dev
)
363 return dev
->parent_bus
;
366 static NamedGPIOList
*qdev_get_named_gpio_list(DeviceState
*dev
,
371 QLIST_FOREACH(ngl
, &dev
->gpios
, node
) {
372 /* NULL is a valid and matchable name, otherwise do a normal
375 if ((!ngl
->name
&& !name
) ||
376 (name
&& ngl
->name
&& strcmp(name
, ngl
->name
) == 0)) {
381 ngl
= g_malloc0(sizeof(*ngl
));
382 ngl
->name
= g_strdup(name
);
383 QLIST_INSERT_HEAD(&dev
->gpios
, ngl
, node
);
387 void qdev_init_gpio_in_named(DeviceState
*dev
, qemu_irq_handler handler
,
388 const char *name
, int n
)
391 NamedGPIOList
*gpio_list
= qdev_get_named_gpio_list(dev
, name
);
393 assert(gpio_list
->num_out
== 0 || !name
);
394 gpio_list
->in
= qemu_extend_irqs(gpio_list
->in
, gpio_list
->num_in
, handler
,
398 name
= "unnamed-gpio-in";
400 for (i
= gpio_list
->num_in
; i
< gpio_list
->num_in
+ n
; i
++) {
401 gchar
*propname
= g_strdup_printf("%s[%u]", name
, i
);
403 object_property_add_child(OBJECT(dev
), propname
,
404 OBJECT(gpio_list
->in
[i
]), &error_abort
);
408 gpio_list
->num_in
+= n
;
411 void qdev_init_gpio_in(DeviceState
*dev
, qemu_irq_handler handler
, int n
)
413 qdev_init_gpio_in_named(dev
, handler
, NULL
, n
);
416 void qdev_init_gpio_out_named(DeviceState
*dev
, qemu_irq
*pins
,
417 const char *name
, int n
)
420 NamedGPIOList
*gpio_list
= qdev_get_named_gpio_list(dev
, name
);
422 assert(gpio_list
->num_in
== 0 || !name
);
425 name
= "unnamed-gpio-out";
427 memset(pins
, 0, sizeof(*pins
) * n
);
428 for (i
= 0; i
< n
; ++i
) {
429 gchar
*propname
= g_strdup_printf("%s[%u]", name
,
430 gpio_list
->num_out
+ i
);
432 object_property_add_link(OBJECT(dev
), propname
, TYPE_IRQ
,
434 object_property_allow_set_link
,
435 OBJ_PROP_LINK_UNREF_ON_RELEASE
,
439 gpio_list
->num_out
+= n
;
442 void qdev_init_gpio_out(DeviceState
*dev
, qemu_irq
*pins
, int n
)
444 qdev_init_gpio_out_named(dev
, pins
, NULL
, n
);
447 qemu_irq
qdev_get_gpio_in_named(DeviceState
*dev
, const char *name
, int n
)
449 NamedGPIOList
*gpio_list
= qdev_get_named_gpio_list(dev
, name
);
451 assert(n
>= 0 && n
< gpio_list
->num_in
);
452 return gpio_list
->in
[n
];
455 qemu_irq
qdev_get_gpio_in(DeviceState
*dev
, int n
)
457 return qdev_get_gpio_in_named(dev
, NULL
, n
);
460 void qdev_connect_gpio_out_named(DeviceState
*dev
, const char *name
, int n
,
463 char *propname
= g_strdup_printf("%s[%d]",
464 name
? name
: "unnamed-gpio-out", n
);
466 /* We need a name for object_property_set_link to work. If the
467 * object has a parent, object_property_add_child will come back
468 * with an error without doing anything. If it has none, it will
469 * never fail. So we can just call it with a NULL Error pointer.
471 object_property_add_child(container_get(qdev_get_machine(),
473 "non-qdev-gpio[*]", OBJECT(pin
), NULL
);
475 object_property_set_link(OBJECT(dev
), OBJECT(pin
), propname
, &error_abort
);
479 qemu_irq
qdev_get_gpio_out_connector(DeviceState
*dev
, const char *name
, int n
)
481 char *propname
= g_strdup_printf("%s[%d]",
482 name
? name
: "unnamed-gpio-out", n
);
484 qemu_irq ret
= (qemu_irq
)object_property_get_link(OBJECT(dev
), propname
,
490 /* disconnect a GPIO output, returning the disconnected input (if any) */
492 static qemu_irq
qdev_disconnect_gpio_out_named(DeviceState
*dev
,
493 const char *name
, int n
)
495 char *propname
= g_strdup_printf("%s[%d]",
496 name
? name
: "unnamed-gpio-out", n
);
498 qemu_irq ret
= (qemu_irq
)object_property_get_link(OBJECT(dev
), propname
,
501 object_property_set_link(OBJECT(dev
), NULL
, propname
, NULL
);
507 qemu_irq
qdev_intercept_gpio_out(DeviceState
*dev
, qemu_irq icpt
,
508 const char *name
, int n
)
510 qemu_irq disconnected
= qdev_disconnect_gpio_out_named(dev
, name
, n
);
511 qdev_connect_gpio_out_named(dev
, name
, n
, icpt
);
515 void qdev_connect_gpio_out(DeviceState
* dev
, int n
, qemu_irq pin
)
517 qdev_connect_gpio_out_named(dev
, NULL
, n
, pin
);
520 void qdev_pass_gpios(DeviceState
*dev
, DeviceState
*container
,
524 NamedGPIOList
*ngl
= qdev_get_named_gpio_list(dev
, name
);
526 for (i
= 0; i
< ngl
->num_in
; i
++) {
527 const char *nm
= ngl
->name
? ngl
->name
: "unnamed-gpio-in";
528 char *propname
= g_strdup_printf("%s[%d]", nm
, i
);
530 object_property_add_alias(OBJECT(container
), propname
,
531 OBJECT(dev
), propname
,
535 for (i
= 0; i
< ngl
->num_out
; i
++) {
536 const char *nm
= ngl
->name
? ngl
->name
: "unnamed-gpio-out";
537 char *propname
= g_strdup_printf("%s[%d]", nm
, i
);
539 object_property_add_alias(OBJECT(container
), propname
,
540 OBJECT(dev
), propname
,
544 QLIST_REMOVE(ngl
, node
);
545 QLIST_INSERT_HEAD(&container
->gpios
, ngl
, node
);
548 BusState
*qdev_get_child_bus(DeviceState
*dev
, const char *name
)
551 Object
*child
= object_resolve_path_component(OBJECT(dev
), name
);
553 bus
= (BusState
*)object_dynamic_cast(child
, TYPE_BUS
);
558 QLIST_FOREACH(bus
, &dev
->child_bus
, sibling
) {
559 if (strcmp(name
, bus
->name
) == 0) {
566 int qdev_walk_children(DeviceState
*dev
,
567 qdev_walkerfn
*pre_devfn
, qbus_walkerfn
*pre_busfn
,
568 qdev_walkerfn
*post_devfn
, qbus_walkerfn
*post_busfn
,
575 err
= pre_devfn(dev
, opaque
);
581 QLIST_FOREACH(bus
, &dev
->child_bus
, sibling
) {
582 err
= qbus_walk_children(bus
, pre_devfn
, pre_busfn
,
583 post_devfn
, post_busfn
, opaque
);
590 err
= post_devfn(dev
, opaque
);
599 DeviceState
*qdev_find_recursive(BusState
*bus
, const char *id
)
605 QTAILQ_FOREACH(kid
, &bus
->children
, sibling
) {
606 DeviceState
*dev
= kid
->child
;
608 if (dev
->id
&& strcmp(dev
->id
, id
) == 0) {
612 QLIST_FOREACH(child
, &dev
->child_bus
, sibling
) {
613 ret
= qdev_find_recursive(child
, id
);
622 static char *bus_get_fw_dev_path(BusState
*bus
, DeviceState
*dev
)
624 BusClass
*bc
= BUS_GET_CLASS(bus
);
626 if (bc
->get_fw_dev_path
) {
627 return bc
->get_fw_dev_path(dev
);
633 static char *qdev_get_fw_dev_path_from_handler(BusState
*bus
, DeviceState
*dev
)
635 Object
*obj
= OBJECT(dev
);
638 while (!d
&& obj
->parent
) {
640 d
= fw_path_provider_try_get_dev_path(obj
, bus
, dev
);
645 char *qdev_get_own_fw_dev_path_from_handler(BusState
*bus
, DeviceState
*dev
)
647 Object
*obj
= OBJECT(dev
);
649 return fw_path_provider_try_get_dev_path(obj
, bus
, dev
);
652 static int qdev_get_fw_dev_path_helper(DeviceState
*dev
, char *p
, int size
)
656 if (dev
&& dev
->parent_bus
) {
658 l
= qdev_get_fw_dev_path_helper(dev
->parent_bus
->parent
, p
, size
);
659 d
= qdev_get_fw_dev_path_from_handler(dev
->parent_bus
, dev
);
661 d
= bus_get_fw_dev_path(dev
->parent_bus
, dev
);
664 l
+= snprintf(p
+ l
, size
- l
, "%s", d
);
670 l
+= snprintf(p
+ l
, size
- l
, "/");
675 char* qdev_get_fw_dev_path(DeviceState
*dev
)
680 l
= qdev_get_fw_dev_path_helper(dev
, path
, 128);
684 return g_strdup(path
);
687 char *qdev_get_dev_path(DeviceState
*dev
)
691 if (!dev
|| !dev
->parent_bus
) {
695 bc
= BUS_GET_CLASS(dev
->parent_bus
);
696 if (bc
->get_dev_path
) {
697 return bc
->get_dev_path(dev
);
704 * Legacy property handling
707 static void qdev_get_legacy_property(Object
*obj
, Visitor
*v
,
708 const char *name
, void *opaque
,
711 DeviceState
*dev
= DEVICE(obj
);
712 Property
*prop
= opaque
;
717 prop
->info
->print(dev
, prop
, buffer
, sizeof(buffer
));
718 visit_type_str(v
, name
, &ptr
, errp
);
722 * qdev_property_add_legacy:
723 * @dev: Device to add the property to.
724 * @prop: The qdev property definition.
725 * @errp: location to store error information.
727 * Add a legacy QOM property to @dev for qdev property @prop.
728 * On error, store error in @errp.
730 * Legacy properties are string versions of QOM properties. The format of
731 * the string depends on the property type. Legacy properties are only
732 * needed for "info qtree".
734 * Do not use this is new code! QOM Properties added through this interface
735 * will be given names in the "legacy" namespace.
737 static void qdev_property_add_legacy(DeviceState
*dev
, Property
*prop
,
742 /* Register pointer properties as legacy properties */
743 if (!prop
->info
->print
&& prop
->info
->get
) {
747 if (prop
->info
->create
) {
751 name
= g_strdup_printf("legacy-%s", prop
->name
);
752 object_property_add(OBJECT(dev
), name
, "str",
753 prop
->info
->print
? qdev_get_legacy_property
: prop
->info
->get
,
762 * qdev_property_add_static:
763 * @dev: Device to add the property to.
764 * @prop: The qdev property definition.
765 * @errp: location to store error information.
767 * Add a static QOM property to @dev for qdev property @prop.
768 * On error, store error in @errp. Static properties access data in a struct.
769 * The type of the QOM property is derived from prop->info.
771 void qdev_property_add_static(DeviceState
*dev
, Property
*prop
,
774 Error
*local_err
= NULL
;
775 Object
*obj
= OBJECT(dev
);
777 if (prop
->info
->create
) {
778 prop
->info
->create(obj
, prop
, &local_err
);
781 * TODO qdev_prop_ptr does not have getters or setters. It must
782 * go now that it can be replaced with links. The test should be
783 * removed along with it: all static properties are read/write.
785 if (!prop
->info
->get
&& !prop
->info
->set
) {
788 object_property_add(obj
, prop
->name
, prop
->info
->name
,
789 prop
->info
->get
, prop
->info
->set
,
795 error_propagate(errp
, local_err
);
799 object_property_set_description(obj
, prop
->name
,
800 prop
->info
->description
,
803 if (prop
->info
->set_default_value
) {
804 prop
->info
->set_default_value(obj
, prop
);
808 /* @qdev_alias_all_properties - Add alias properties to the source object for
809 * all qdev properties on the target DeviceState.
811 void qdev_alias_all_properties(DeviceState
*target
, Object
*source
)
816 class = object_get_class(OBJECT(target
));
818 DeviceClass
*dc
= DEVICE_CLASS(class);
820 for (prop
= dc
->props
; prop
&& prop
->name
; prop
++) {
821 object_property_add_alias(source
, prop
->name
,
822 OBJECT(target
), prop
->name
,
825 class = object_class_get_parent(class);
826 } while (class != object_class_by_name(TYPE_DEVICE
));
829 static int qdev_add_hotpluggable_device(Object
*obj
, void *opaque
)
831 GSList
**list
= opaque
;
832 DeviceState
*dev
= (DeviceState
*)object_dynamic_cast(OBJECT(obj
),
839 if (dev
->realized
&& object_property_get_bool(obj
, "hotpluggable", NULL
)) {
840 *list
= g_slist_append(*list
, dev
);
846 GSList
*qdev_build_hotpluggable_device_list(Object
*peripheral
)
850 object_child_foreach(peripheral
, qdev_add_hotpluggable_device
, &list
);
855 static bool device_get_realized(Object
*obj
, Error
**errp
)
857 DeviceState
*dev
= DEVICE(obj
);
858 return dev
->realized
;
861 static bool check_only_migratable(Object
*obj
, Error
**err
)
863 DeviceClass
*dc
= DEVICE_GET_CLASS(obj
);
865 if (!vmstate_check_only_migratable(dc
->vmsd
)) {
866 error_setg(err
, "Device %s is not migratable, but "
867 "--only-migratable was specified",
868 object_get_typename(obj
));
875 static void device_set_realized(Object
*obj
, bool value
, Error
**errp
)
877 DeviceState
*dev
= DEVICE(obj
);
878 DeviceClass
*dc
= DEVICE_GET_CLASS(dev
);
879 HotplugHandler
*hotplug_ctrl
;
881 Error
*local_err
= NULL
;
882 bool unattached_parent
= false;
883 static int unattached_count
;
885 if (dev
->hotplugged
&& !dc
->hotpluggable
) {
886 error_setg(errp
, QERR_DEVICE_NO_HOTPLUG
, object_get_typename(obj
));
890 if (value
&& !dev
->realized
) {
891 if (!check_only_migratable(obj
, &local_err
)) {
896 gchar
*name
= g_strdup_printf("device[%d]", unattached_count
++);
898 object_property_add_child(container_get(qdev_get_machine(),
900 name
, obj
, &error_abort
);
901 unattached_parent
= true;
905 hotplug_ctrl
= qdev_get_hotplug_handler(dev
);
907 hotplug_handler_pre_plug(hotplug_ctrl
, dev
, &local_err
);
908 if (local_err
!= NULL
) {
914 dc
->realize(dev
, &local_err
);
917 if (local_err
!= NULL
) {
921 DEVICE_LISTENER_CALL(realize
, Forward
, dev
);
924 hotplug_handler_plug(hotplug_ctrl
, dev
, &local_err
);
927 if (local_err
!= NULL
) {
928 goto post_realize_fail
;
931 if (qdev_get_vmsd(dev
)) {
932 if (vmstate_register_with_alias_id(dev
, -1, qdev_get_vmsd(dev
), dev
,
933 dev
->instance_id_alias
,
934 dev
->alias_required_for_version
,
936 goto post_realize_fail
;
940 QLIST_FOREACH(bus
, &dev
->child_bus
, sibling
) {
941 object_property_set_bool(OBJECT(bus
), true, "realized",
943 if (local_err
!= NULL
) {
944 goto child_realize_fail
;
947 if (dev
->hotplugged
) {
950 dev
->pending_deleted_event
= false;
951 } else if (!value
&& dev
->realized
) {
952 Error
**local_errp
= NULL
;
953 QLIST_FOREACH(bus
, &dev
->child_bus
, sibling
) {
954 local_errp
= local_err
? NULL
: &local_err
;
955 object_property_set_bool(OBJECT(bus
), false, "realized",
958 if (qdev_get_vmsd(dev
)) {
959 vmstate_unregister(dev
, qdev_get_vmsd(dev
), dev
);
962 local_errp
= local_err
? NULL
: &local_err
;
963 dc
->unrealize(dev
, local_errp
);
965 dev
->pending_deleted_event
= true;
966 DEVICE_LISTENER_CALL(unrealize
, Reverse
, dev
);
969 if (local_err
!= NULL
) {
973 dev
->realized
= value
;
977 QLIST_FOREACH(bus
, &dev
->child_bus
, sibling
) {
978 object_property_set_bool(OBJECT(bus
), false, "realized",
982 if (qdev_get_vmsd(dev
)) {
983 vmstate_unregister(dev
, qdev_get_vmsd(dev
), dev
);
988 dc
->unrealize(dev
, NULL
);
992 error_propagate(errp
, local_err
);
993 if (unattached_parent
) {
994 object_unparent(OBJECT(dev
));
999 static bool device_get_hotpluggable(Object
*obj
, Error
**errp
)
1001 DeviceClass
*dc
= DEVICE_GET_CLASS(obj
);
1002 DeviceState
*dev
= DEVICE(obj
);
1004 return dc
->hotpluggable
&& (dev
->parent_bus
== NULL
||
1005 qbus_is_hotpluggable(dev
->parent_bus
));
1008 static bool device_get_hotplugged(Object
*obj
, Error
**err
)
1010 DeviceState
*dev
= DEVICE(obj
);
1012 return dev
->hotplugged
;
1015 static void device_initfn(Object
*obj
)
1017 DeviceState
*dev
= DEVICE(obj
);
1022 dev
->hotplugged
= 1;
1023 qdev_hot_added
= true;
1026 dev
->instance_id_alias
= -1;
1027 dev
->realized
= false;
1029 object_property_add_bool(obj
, "realized",
1030 device_get_realized
, device_set_realized
, NULL
);
1031 object_property_add_bool(obj
, "hotpluggable",
1032 device_get_hotpluggable
, NULL
, NULL
);
1033 object_property_add_bool(obj
, "hotplugged",
1034 device_get_hotplugged
, NULL
,
1037 class = object_get_class(OBJECT(dev
));
1039 for (prop
= DEVICE_CLASS(class)->props
; prop
&& prop
->name
; prop
++) {
1040 qdev_property_add_legacy(dev
, prop
, &error_abort
);
1041 qdev_property_add_static(dev
, prop
, &error_abort
);
1043 class = object_class_get_parent(class);
1044 } while (class != object_class_by_name(TYPE_DEVICE
));
1046 object_property_add_link(OBJECT(dev
), "parent_bus", TYPE_BUS
,
1047 (Object
**)&dev
->parent_bus
, NULL
, 0,
1049 QLIST_INIT(&dev
->gpios
);
1052 static void device_post_init(Object
*obj
)
1054 qdev_prop_set_globals(DEVICE(obj
));
1057 /* Unlink device from bus and free the structure. */
1058 static void device_finalize(Object
*obj
)
1060 NamedGPIOList
*ngl
, *next
;
1062 DeviceState
*dev
= DEVICE(obj
);
1064 QLIST_FOREACH_SAFE(ngl
, &dev
->gpios
, node
, next
) {
1065 QLIST_REMOVE(ngl
, node
);
1066 qemu_free_irqs(ngl
->in
, ngl
->num_in
);
1069 /* ngl->out irqs are owned by the other end and should not be freed
1075 static void device_class_base_init(ObjectClass
*class, void *data
)
1077 DeviceClass
*klass
= DEVICE_CLASS(class);
1079 /* We explicitly look up properties in the superclasses,
1080 * so do not propagate them to the subclasses.
1082 klass
->props
= NULL
;
1085 static void device_unparent(Object
*obj
)
1087 DeviceState
*dev
= DEVICE(obj
);
1090 if (dev
->realized
) {
1091 object_property_set_bool(obj
, false, "realized", NULL
);
1093 while (dev
->num_child_bus
) {
1094 bus
= QLIST_FIRST(&dev
->child_bus
);
1095 object_unparent(OBJECT(bus
));
1097 if (dev
->parent_bus
) {
1098 bus_remove_child(dev
->parent_bus
, dev
);
1099 object_unref(OBJECT(dev
->parent_bus
));
1100 dev
->parent_bus
= NULL
;
1103 /* Only send event if the device had been completely realized */
1104 if (dev
->pending_deleted_event
) {
1105 gchar
*path
= object_get_canonical_path(OBJECT(dev
));
1107 qapi_event_send_device_deleted(!!dev
->id
, dev
->id
, path
, &error_abort
);
1111 qemu_opts_del(dev
->opts
);
1115 static void device_class_init(ObjectClass
*class, void *data
)
1117 DeviceClass
*dc
= DEVICE_CLASS(class);
1119 class->unparent
= device_unparent
;
1120 dc
->realize
= device_realize
;
1121 dc
->unrealize
= device_unrealize
;
1123 /* by default all devices were considered as hotpluggable,
1124 * so with intent to check it in generic qdev_unplug() /
1125 * device_set_realized() functions make every device
1126 * hotpluggable. Devices that shouldn't be hotpluggable,
1127 * should override it in their class_init()
1129 dc
->hotpluggable
= true;
1130 dc
->user_creatable
= true;
1133 void device_reset(DeviceState
*dev
)
1135 DeviceClass
*klass
= DEVICE_GET_CLASS(dev
);
1142 Object
*qdev_get_machine(void)
1147 dev
= container_get(object_get_root(), "/machine");
1153 static const TypeInfo device_type_info
= {
1154 .name
= TYPE_DEVICE
,
1155 .parent
= TYPE_OBJECT
,
1156 .instance_size
= sizeof(DeviceState
),
1157 .instance_init
= device_initfn
,
1158 .instance_post_init
= device_post_init
,
1159 .instance_finalize
= device_finalize
,
1160 .class_base_init
= device_class_base_init
,
1161 .class_init
= device_class_init
,
1163 .class_size
= sizeof(DeviceClass
),
1166 static void qdev_register_types(void)
1168 type_register_static(&device_type_info
);
1171 type_init(qdev_register_types
)