linux-kernel - Re: [Alacrityvm-devel] [PATCH v3 3/6] vbus: add a "vbus-proxy" bus model for vbus

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Message-ID: <4A8C2A87.5060305@redhat.com>
Date:	Wed, 19 Aug 2009 19:38:31 +0300
From:	Avi Kivity <avi@...hat.com>
To:	"Ira W. Snyder" <iws@...o.caltech.edu>
CC:	"Michael S. Tsirkin" <mst@...hat.com>,
	Gregory Haskins <gregory.haskins@...il.com>,
	kvm@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	alacrityvm-devel@...ts.sourceforge.net,
	Anthony Liguori <anthony@...emonkey.ws>,
	Ingo Molnar <mingo@...e.hu>,
	Gregory Haskins <ghaskins@...ell.com>,
	Hollis Blanchard <hollisb@...ibm.com>
Subject: Re: [Alacrityvm-devel] [PATCH v3 3/6] vbus: add a "vbus-proxy" bus
 model for vbus_driver objects

On 08/19/2009 07:29 PM, Ira W. Snyder wrote:
>
>    
>> virtio-$yourhardware or maybe virtio-dma
>>
>>      
> How about virtio-phys?
>    

Could work.

> Arnd and BenH are both looking at PPC systems (similar to mine). Grant
> Likely is looking at talking to an processor core running on an FPGA,
> IIRC. Most of the code can be shared, very little should need to be
> board-specific, I hope.
>    

Excellent.

>>> That said, I'm not sure how qemu-system-ppc running on x86 could
>>> possibly communicate using virtio-net. This would mean the guest is an
>>> emulated big-endian PPC, while the host is a little-endian x86. I
>>> haven't actually tested this situation, so perhaps I am wrong.
>>>
>>>        
>> I'm confused now.  You don't actually have any guest, do you, so why
>> would you run qemu at all?
>>
>>      
> I do not run qemu. I am just stating a problem with virtio-net that I
> noticed. This is just so someone more knowledgeable can be aware of the
> problem.
>
>    

Ah, it certainly doesn't byteswap.  Maybe nobody tried it.  Hollis?

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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