On Wed, 2012-01-11 at 17:21 +0200, Michael S. Tsirkin wrote:

Possible but doesn't let us layer nicely to allow unchanged drivers
that work with all transports (new pci, old pci, non pci).
Something like a command VQ would be a generic transport
that can be hidden behind  config->set(...).

I agree, a command VQ (And possibly a status VQ) would be generally
useful.

Cheers,
Ben.