[PATCH 0/4] Shadow VirtQueue event index support

[Eugenio Pérez]

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