diff options
Diffstat (limited to 'hw/core')
| -rw-r--r-- | hw/core/Makefile.objs | 1 | ||||
| -rw-r--r-- | hw/core/hotplug.c | 48 | ||||
| -rw-r--r-- | hw/core/qdev.c | 50 |
3 files changed, 95 insertions, 4 deletions
diff --git a/hw/core/Makefile.objs b/hw/core/Makefile.objs index 950146c6ff..9e324befd6 100644 --- a/hw/core/Makefile.objs +++ b/hw/core/Makefile.objs @@ -2,6 +2,7 @@ common-obj-y += qdev.o qdev-properties.o # irq.o needed for qdev GPIO handling: common-obj-y += irq.o +common-obj-y += hotplug.o common-obj-$(CONFIG_EMPTY_SLOT) += empty_slot.o common-obj-$(CONFIG_XILINX_AXI) += stream.o diff --git a/hw/core/hotplug.c b/hw/core/hotplug.c new file mode 100644 index 0000000000..5573d9d2d9 --- /dev/null +++ b/hw/core/hotplug.c @@ -0,0 +1,48 @@ +/* + * Hotplug handler interface. + * + * Copyright (c) 2014 Red Hat Inc. + * + * Authors: + * Igor Mammedov <imammedo@redhat.com>, + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ +#include "hw/hotplug.h" +#include "qemu/module.h" + +void hotplug_handler_plug(HotplugHandler *plug_handler, + DeviceState *plugged_dev, + Error **errp) +{ + HotplugHandlerClass *hdc = HOTPLUG_HANDLER_GET_CLASS(plug_handler); + + if (hdc->plug) { + hdc->plug(plug_handler, plugged_dev, errp); + } +} + +void hotplug_handler_unplug(HotplugHandler *plug_handler, + DeviceState *plugged_dev, + Error **errp) +{ + HotplugHandlerClass *hdc = HOTPLUG_HANDLER_GET_CLASS(plug_handler); + + if (hdc->unplug) { + hdc->unplug(plug_handler, plugged_dev, errp); + } +} + +static const TypeInfo hotplug_handler_info = { + .name = TYPE_HOTPLUG_HANDLER, + .parent = TYPE_INTERFACE, + .class_size = sizeof(HotplugHandlerClass), +}; + +static void hotplug_handler_register_types(void) +{ + type_register_static(&hotplug_handler_info); +} + +type_init(hotplug_handler_register_types) diff --git a/hw/core/qdev.c b/hw/core/qdev.c index 482a9780d1..c0b857fbd4 100644 --- a/hw/core/qdev.c +++ b/hw/core/qdev.c @@ -32,6 +32,7 @@ #include "qapi/visitor.h" #include "qapi/qmp/qjson.h" #include "monitor/monitor.h" +#include "hw/hotplug.h" int qdev_hotplug = 0; static bool qdev_hot_added = false; @@ -212,13 +213,22 @@ void qdev_unplug(DeviceState *dev, Error **errp) error_set(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name); return; } - assert(dc->unplug != NULL); + + if (!dc->hotpluggable) { + error_set(errp, QERR_DEVICE_NO_HOTPLUG, + object_get_typename(OBJECT(dev))); + return; + } qdev_hot_removed = true; - if (dc->unplug(dev) < 0) { - error_set(errp, QERR_UNDEFINED_ERROR); - return; + if (dev->parent_bus && dev->parent_bus->hotplug_handler) { + hotplug_handler_unplug(dev->parent_bus->hotplug_handler, dev, errp); + } else { + assert(dc->unplug != NULL); + if (dc->unplug(dev) < 0) { /* legacy handler */ + error_set(errp, QERR_UNDEFINED_ERROR); + } } } @@ -663,6 +673,11 @@ static void device_set_realized(Object *obj, bool value, Error **err) DeviceClass *dc = DEVICE_GET_CLASS(dev); Error *local_err = NULL; + if (dev->hotplugged && !dc->hotpluggable) { + error_set(err, QERR_DEVICE_NO_HOTPLUG, object_get_typename(obj)); + return; + } + if (value && !dev->realized) { if (!obj->parent && local_err == NULL) { static int unattached_count; @@ -678,6 +693,12 @@ static void device_set_realized(Object *obj, bool value, Error **err) dc->realize(dev, &local_err); } + if (dev->parent_bus && dev->parent_bus->hotplug_handler && + local_err == NULL) { + hotplug_handler_plug(dev->parent_bus->hotplug_handler, + dev, &local_err); + } + if (qdev_get_vmsd(dev) && local_err == NULL) { vmstate_register_with_alias_id(dev, -1, qdev_get_vmsd(dev), dev, dev->instance_id_alias, @@ -703,6 +724,14 @@ static void device_set_realized(Object *obj, bool value, Error **err) dev->realized = value; } +static bool device_get_hotpluggable(Object *obj, Error **err) +{ + DeviceClass *dc = DEVICE_GET_CLASS(obj); + DeviceState *dev = DEVICE(obj); + + return dc->hotpluggable && dev->parent_bus->allow_hotplug; +} + static void device_initfn(Object *obj) { DeviceState *dev = DEVICE(obj); @@ -719,6 +748,8 @@ static void device_initfn(Object *obj) object_property_add_bool(obj, "realized", device_get_realized, device_set_realized, NULL); + object_property_add_bool(obj, "hotpluggable", + device_get_hotpluggable, NULL, NULL); class = object_get_class(OBJECT(dev)); do { @@ -755,6 +786,14 @@ static void device_class_base_init(ObjectClass *class, void *data) * so do not propagate them to the subclasses. */ klass->props = NULL; + + /* by default all devices were considered as hotpluggable, + * so with intent to check it in generic qdev_unplug() / + * device_set_realized() functions make every device + * hotpluggable. Devices that shouldn't be hotpluggable, + * should override it in their class_init() + */ + klass->hotpluggable = true; } static void device_unparent(Object *obj) @@ -840,6 +879,9 @@ static void qbus_initfn(Object *obj) BusState *bus = BUS(obj); QTAILQ_INIT(&bus->children); + object_property_add_link(obj, QDEV_HOTPLUG_HANDLER_PROPERTY, + TYPE_HOTPLUG_HANDLER, + (Object **)&bus->hotplug_handler, NULL); } static char *default_bus_get_fw_dev_path(DeviceState *dev) |