On Tue, Oct 05, 2021 at 12:46:34PM +0200, Halil Pasic wrote: > On Tue, 5 Oct 2021 03:53:17 -0400 > "Michael S. Tsirkin" <mst@xxxxxxxxxx> wrote: > > > > Wouldn't a call from transport code into virtio core > > > be more handy? What I have in mind is stuff like vhost-user and vdpa. My > > > understanding is, that for vhost setups where the config is outside qemu, > > > we probably need a new command that tells the vhost backend what > > > endiannes to use for config. I don't think we can use > > > VHOST_USER_SET_VRING_ENDIAN because that one is on a virtqueue basis > > > according to the doc. So for vhost-user and similar we would fire that > > > command and probably also set the filed, while for devices for which > > > control plane is handled by QEMU we would just set the field. > > > > > > Does that sound about right? > > > > I'm fine either way, but when would you invoke this? > > With my idea backends can check the field when get_config > > is invoked. > > > > As for using this in VHOST, can we maybe re-use SET_FEATURES? > > > > Kind of hacky but nice in that it will actually make existing backends > > work... > > Basically the equivalent of this patch, just on the vhost interface, > right? Could work I have to look into it :) yep
