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Add device listener interface

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The Xen ioreq-server API, introduced in Xen 4.5, requires that PCI device
models explicitly register with Xen for config space accesses. This patch
adds a listener interface into qdev-core which can be used by the Xen
interface code to monitor for arrival and departure of PCI devices.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paul Durrant
2015-01-20 11:05:07 +00:00
committed by Stefano Stabellini
parent 74acb99737
commit 707ff80021
3 changed files with 64 additions and 0 deletions
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10
include/hw/qdev-core.h
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@@ -165,6 +165,12 @@ struct DeviceState {
int alias_required_for_version;
};
struct DeviceListener {
void (*realize)(DeviceListener *listener, DeviceState *dev);
void (*unrealize)(DeviceListener *listener, DeviceState *dev);
QTAILQ_ENTRY(DeviceListener) link;
};
#define TYPE_BUS "bus"
#define BUS(obj) OBJECT_CHECK(BusState, (obj), TYPE_BUS)
#define BUS_CLASS(klass) OBJECT_CLASS_CHECK(BusClass, (klass), TYPE_BUS)
@@ -376,4 +382,8 @@ static inline bool qbus_is_hotpluggable(BusState *bus)
{
return bus->hotplug_handler;
}
void device_listener_register(DeviceListener *listener);
void device_listener_unregister(DeviceListener *listener);
#endif