[dpdk-dev] [PATCH v2] vhost: Add indirect descriptors support to the TX path

Michael S. Tsirkin mst at redhat.com
Sun Sep 25 03:53:59 CEST 2016


On Sat, Sep 24, 2016 at 06:50:07PM -0700, Stephen Hemminger wrote:
> On Sun, 25 Sep 2016 04:02:28 +0300
> "Michael S. Tsirkin" <mst at redhat.com> wrote:
> 
> > I see. It's implied by VERSION_1 in fact.
> > In other words if VERSION_1 is negotiated then bit 27
> > isn't ANY_LAYOUT, it's in fact reserved.
> 
> 
> But what if guest isn't using Version 1? Legacy distro's certainly
> won't have it enabled.

We probably can just expose ANY_LAYOUT to guest if backend
has VERSION_1.


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