On 01/11/2012 02:14 PM, Michael S. Tsirkin wrote:

On Wed, Jan 11, 2012 at 01:42:39PM -0600, Anthony Liguori wrote:

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On 01/11/2012 11:08 AM, Michael S. Tsirkin wrote:

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Not sure what you mean. Using VQ is DMA which is pretty common for PCI.

Do you know of a network device that obtains it's mac address via a DMA transaction?

Sure.
See mlx4_replace_mac in drivers/net/ethernet/mellanox/mlx4/port.c

I'd say that's a special case but I see what you're getting at here.

So what about keeping the config space read-only and using control queues for 
everything else?

Regards,

Anthony Liguori

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Regards,

Anthony Liguori

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