linux-kernel - Re: [PATCH RFC] virtio-spec: flexible configuration layout

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Date:	Wed, 09 Nov 2011 14:07:21 +0200
From:	Sasha Levin <levinsasha928@...il.com>
To:	Pawel Moll <pawel.moll@....com>
Cc:	"Michael S. Tsirkin" <mst@...hat.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	lkml - Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Alexey Kardashevskiy <aik@...abs.ru>,
	Amit Shah <amit.shah@...hat.com>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	Krishna Kumar <krkumar2@...ibm.com>,
	Wang Sheng-Hui <shhuiw@...il.com>,
	"virtualization@...ts.linux-foundation.org" 
	<virtualization@...ts.linux-foundation.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"avi@...hat.com" <avi@...hat.com>,
	Peter Maydell <peter.maydell@...aro.org>
Subject: Re: [PATCH RFC] virtio-spec: flexible configuration layout

On Wed, 2011-11-09 at 11:06 +0000, Pawel Moll wrote:
> On Wed, 2011-11-09 at 10:55 +0000, Sasha Levin wrote:
> > On Wed, 2011-11-09 at 10:47 +0000, Pawel Moll wrote:
> > > Yep, it's actually already in 3.2-rc1 (drivers/virtio/virtio_mmio.c) and
> > > in the spec (see Appendix X). And actually the control registers layout
> > > I used was originally based on the PCI "legacy" headers (slightly
> > > simplified), but evolved a bit since. My understanding is that the
> > > changes Michael is proposing affect the PCI device interface only so
> > > they shouldn't affect "my" interface.
> > 
> > I didn't know it's in already, might be interesting adding support to it
> > to x86 userspace tools.
> 
> Do you mean the qemu or the (non-qemu) KVM tools I know nothing
> about? ;-)

I'll get you in the loop when we add virtio-mmio :)

> 
> If qemu, Peter got it already running with virtio_mmio on ARM models
> (not upstream yet as far as I know), but I presume the code would we
> mostly non-ARM specific.
> 
> Cheers!
> 
> Pawel
> 
> 

-- 

Sasha.

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