Re: [PATCH v4 0/4] virtio: Clean up scatterlists and use the DMA API

Benjamin Herrenschmidt
2014-09-05T05:20:51Z

On Thu, 2014-09-04 at 19:57 -0700, Andy Lutomirski wrote:

> There's a third option: try to make virtio-mmio work everywhere
> (except s390), at least in the long run. This other benefits: it
> makes minimal hypervisors simpler, I think it'll get rid of the limits
> on the number of virtio devices in a system. ARM is already going
> this direction, and I imagine that PPC support would be
> straightforward (it's already using devicetree).

PCI has advantages though. Management stacks know about PCI and nothing
else really. We already have all the infra to do hotplug with PCI,
etc...

> Does virtio-mmio have any reasonable way of doing hotplug? It could
> also eventually make sense to have a standard for virtio on virtio.

That would be very platform specific.

Cheers,
Ben.