linux-kernel - Re: [PATCH RFC v5] net: add PCINet driver

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Message-Id: <200901152222.55006.arnd@arndb.de>
Date:	Thu, 15 Jan 2009 22:22:53 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	linuxppc-dev@...abs.org
Cc:	Ira Snyder <iws@...o.caltech.edu>, netdev@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>,
	linux-kernel@...r.kernel.org, shemminger@...tta.com,
	David Miller <davem@...emloft.net>,
	"Jan-Bernd Themann" <themann@...ibm.com>
Subject: Re: [PATCH RFC v5] net: add PCINet driver

On Thursday 15 January 2009, Ira Snyder wrote:
> I have another question for you Arnd.
> 
> What did you use as the host and guest drivers when you ran virtio over
> PCI? Did you use two unmodified instances of virtio_net (one on host,
> one on guest) for networking, or did you write new virtio drivers for
> those? How about for virtio_console (if you ran it at all).

Jan-Bernd may be able to tell you details about this, and send you the
driver code that his interns implemented for it.
This was only doing virtio_net between two machines using MMIO transfers,
i.e. the DMA engine was unused, but there was a mailbox interrupt (if you
have one of these, you won't need MSI, btw -- just write a DMA to it).

	Arnd <><
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