Re: [RFC][PATCH] virtio: 64 bit features

From: Rusty Russell
Date: Mon Apr 11 2011 - 23:50:09 EST

On Mon, 11 Apr 2011 19:55:25 +0300, "Michael S. Tsirkin" <mst@xxxxxxxxxx> wrote:
> Extend features to 64 bit so we can use more
> transport bits.
> Future patches add two new feature bits which would
> exhaust the supply of transport feature bits,
> so let's add bit 31 to tell the guest that
> there are now 64 worth of features.
> For PCI this also changes the config layout.
> Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>

This was pretty much the way I imagined it would work. We need a patch
to the spec and a lot of cross testing...

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