diff options
Diffstat (limited to 'include/hw/virtio/virtio-bus.h')
| -rw-r--r-- | include/hw/virtio/virtio-bus.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/hw/virtio/virtio-bus.h b/include/hw/virtio/virtio-bus.h index fdf7fdab81..8a51e2c564 100644 --- a/include/hw/virtio/virtio-bus.h +++ b/include/hw/virtio/virtio-bus.h @@ -97,6 +97,16 @@ struct VirtioBusState { * Set if ioeventfd has been started. */ bool ioeventfd_started; + + /* + * Set if ioeventfd has been grabbed by vhost. When ioeventfd + * is grabbed by vhost, we track its started/stopped state (which + * depends in turn on the virtio status register), but do not + * register a handler for the ioeventfd. When ioeventfd is + * released, if ioeventfd_started is true we finally register + * the handler so that QEMU's device model can use ioeventfd. + */ + int ioeventfd_grabbed; }; void virtio_bus_device_plugged(VirtIODevice *vdev, Error **errp); @@ -131,6 +141,10 @@ bool virtio_bus_ioeventfd_enabled(VirtioBusState *bus); int virtio_bus_start_ioeventfd(VirtioBusState *bus); /* Stop the ioeventfd. */ void virtio_bus_stop_ioeventfd(VirtioBusState *bus); +/* Tell the bus that vhost is grabbing the ioeventfd. */ +int virtio_bus_grab_ioeventfd(VirtioBusState *bus); +/* bus that vhost is not using the ioeventfd anymore. */ +void virtio_bus_release_ioeventfd(VirtioBusState *bus); /* Switch from/to the generic ioeventfd handler */ int virtio_bus_set_host_notifier(VirtioBusState *bus, int n, bool assign); |