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virtio: move ioeventfd_started flag to VirtioBusState

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This simplifies the code and removes the ioeventfd_started
and ioeventfd_set_started callback.  The only difference is
in how virtio-ccw handles an error---it doesn't disable
ioeventfd forever anymore.  It was the only backend to do
so, and if desired this behavior should be implemented in

virtio-bus.c.

Instead of ioeventfd_started, the ioeventfd_assign callback now
determines whether the virtio bus supports host notifiers.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-10-21 22:48:06 +02:00 • committed by Michael S. Tsirkin
parent 4ddcc2d5cb
commit b13d396227
10 changed files with 16 additions and 79 deletions
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17
include/hw/virtio/virtio-bus.h
View file

@ -70,17 +70,9 @@ typedef struct VirtioBusClass {
void (*device_unplugged)(DeviceState *d);
int (*query_nvectors)(DeviceState *d);
/*
* ioeventfd handling: if the transport implements ioeventfd_started,
* it must implement the other ioeventfd callbacks as well
* ioeventfd handling: if the transport implements ioeventfd_assign,
* it must implement ioeventfd_disabled as well.
*/
/* Returns true if the ioeventfd has been started for the device. */
bool (*ioeventfd_started)(DeviceState *d);
/*
* Sets the 'ioeventfd started' state after the ioeventfd has been
* started/stopped for the device. err signifies whether an error
* had occurred.
*/
void (*ioeventfd_set_started)(DeviceState *d, bool started, bool err);
/* Returns true if the ioeventfd has been disabled for the device. */
bool (*ioeventfd_disabled)(DeviceState *d);
/*
@ -106,6 +98,11 @@ struct VirtioBusState {
* or dataplane.
*/
bool ioeventfd_disabled;
/*
* Set if ioeventfd has been started.
*/
bool ioeventfd_started;
};
void virtio_bus_device_plugged(VirtIODevice *vdev, Error **errp);