Re: [PATCH v1 1/8] virtio: Force only split mode with protected guest

Andy Lutomirski
2021-06-03T17:33:45Z

On 6/2/21 5:41 PM, Andi Kleen wrote:
> Only allow split mode when in a protected guest. Followon
> patches harden the split mode code paths, and we don't want
> an malicious host to force anything else. Also disallow
> indirect mode for similar reasons.

I read this as "the virtio driver is buggy. Let's disable most of the
buggy code in one special case in which we need a driver without bugs.
In all the other cases (e.g. hardware virtio device connected over
USB-C), driver bugs are still allowed."

Can we just fix the driver without special cases?

--Andy