On Wed, 02 Nov 2011 20:49:27 +0200, Sasha Levin <levinsasha928@xxxxxxxxx> wrote: > This is a proposal for a new layout of the virtio-pci config space. > > We will separate the current configuration into two: A virtio-pci common > configuration and a device specific configuration. This allows more flexibility > with adding features and makes usage easier, specifically in cases like the > ones in virtio-net where device specific configurations depend on device > specific features. Thanks for this Sasha. Several general comments: 1) How to we distinguish the two layouts? In theory, we need to do this forever. In practice we can deprecate the old layout in several years' time. 2) I don't think we want to turn the device-specific config into a linked list. We haven't needed variable-length config (yet!), and it's (slightly) more complex. That's also the part of the spec which is shared with non-PCI virtio implementations. 3) If we're changing the queue layout, it's a chance to fix a longstanding bug: let the guest notify the host of preferred queue size and alignment. Cheers, Rusty. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
