Event idx helps to reduce the number of notifications between the device and the driver. It allows them to specify an index on the circular descriptors rings where to issue the notification, instead of a single binary indicator.
Adding support for SVQ. These patches are sent on top of [1] series, so trivial conflicts could arise if it is applied directly on master. Future versions can be not based on it is more convenient. [1] https://lists.nongnu.org/archive/html/qemu-devel/2022-10/msg03280.html Eugenio Pérez (4): vhost: allocate event_idx fields on vring vhost: toggle device callbacks using used event idx vhost: use avail event idx on vhost_svq_kick vhost: Accept event idx flag hw/virtio/vhost-shadow-virtqueue.c | 39 ++++++++++++++++++++++++------ 1 file changed, 31 insertions(+), 8 deletions(-) -- 2.31.1
