Hi Wentao / Rick / Xinying Yu, Would it work for you to test this series on your use cases, so we make sure everything works as expected?
Thanks! On Fri, Mar 1, 2024 at 2:44 PM Jonah Palmer <jonah.pal...@oracle.com> wrote: > > The goal of these patches are to add support to a variety of virtio and > vhost devices for the VIRTIO_F_NOTIFICATION_DATA transport feature. This > feature indicates that a driver will pass extra data (instead of just a > virtqueue's index) when notifying the corresponding device. > > The data passed in by the driver when this feature is enabled varies in > format depending on if the device is using a split or packed virtqueue > layout: > > Split VQ > - Upper 16 bits: last_avail_idx > - Lower 16 bits: virtqueue index > > Packed VQ > - Upper 16 bits: 1-bit wrap counter & 15-bit last_avail_idx > - Lower 16 bits: virtqueue index > > Also, due to the limitations of ioeventfd not being able to carry the > extra provided by the driver, ioeventfd is left disabled for any devices > using this feature. > > A significant aspect of this effort has been to maintain compatibility > across different backends. As such, the feature is offered by backend > devices only when supported, with fallback mechanisms where backend > support is absent. > Hi Wentao,
