On Thu, 2007-09-20 at 14:27 +0200, Avi Kivity wrote: > Rusty Russell wrote: > > +struct virtio_backend_ops virtio_backend_ops; > > +EXPORT_SYMBOL_GPL(virtio_backend_ops); > > Suggest calling this virtio_transport_ops rather than the too-generic > virtio_backend_ops. Especially since Xen uses backend for something > completely different.
Hi Avi, Agreed, fixed. I actually don't like this interface at all, but it is simple until we determine something better. > > +/** > > + * virtqueue_ops - operations for virtqueue abstraction layer > > + * @new_vq: create a new virtqueue > > + * config: the virtio_config_space field describing the queue > > + * off: the offset in the config space of the queue configuration > > + * len: the length of the virtio_config_space field > > > > 'off, len' are really a magic cookie. Why does the interface care about > their meaning? off is a cookie, len isn't. The driver does "get me the foo field" and it returns off + len. If it wants to read or write the foo field it needs that length. In practice, drivers use the virtio_config_vq() convenience interface which does "find field, hand to ops->new_vq". > > + * callback: the driver callback when the queue is used. > > > > Missing callback return value description. Indeed, that's always made me uncomfortable. Fixed. Although it's possible that an explicit disable hook is better... > > + * @kick: update after add_buf > > + * vq: the struct virtqueue > > + * After one or more add_buf calls, invoke this to kick the virtio layer. > > > > 'the other side' Thanks, fixed. > I'm not thrilled about reusing pci ids. Maybe the s390 can say whether > this is a real issue. I doubt it: it's not a problem for lguest. But I wonder if I've chosen the right fields... Rusty. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
