[virtio-dev] Re: [virtio-comment] RE: [PATCH v19] virtio-net: support inner header hash

["Michael S. Tsirkin" <mst@redhat.com>]

On Wed, Jun 28, 2023 at 05:06:40PM +0000, Parav Pandit wrote:
> > > >
> > > > Please let people just focus on fixing config space instead of
> > > > temporary cvq hacks.
> > >
> > > The ask is to have predictable sizing for existing defined config space field and
> > not keep infinitely growing by two interfaces.
> > 
> > I don't know what "predictable sizing" is or why does it matter.
> > 
> Because when device has two ways to access config space, it always have to account and build the interface that, hey some driver will not use DMA.
> Hence have it always in the MMIO accessible area.

Maybe I get it. You want to use the new features as a carrot to force
drivers to implement DMA? You suspect they will ignore the spec
requirement just because things seem to work?

There's some logic here, for sure. you just might be right.

However, surely we can discuss this small tweak in 1.4 timeframe?

-- 
MST


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