linux-kernel - Re: [RFC][PATCH] virtio: 64 bit features

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Date:	Tue, 12 Apr 2011 12:55:42 +0930
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	"Michael S. Tsirkin" <mst@...hat.com>,
	Carsten Otte <cotte@...ibm.com>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	linux390@...ibm.com, Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	"Michael S. Tsirkin" <mst@...hat.com>, lguest@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
	virtualization@...ts.linux-foundation.org
Subject: Re: [RFC][PATCH] virtio: 64 bit features

On Mon, 11 Apr 2011 19:55:25 +0300, "Michael S. Tsirkin" <mst@...hat.com> 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@...hat.com>

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

Thanks!
Rusty.
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