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

From: Jason Wang
Date: Thu Jun 03 2021 - 22:21:01 EST

在 2021/6/4 上午1:33, Andy Lutomirski 写道:
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?

I think we can, this is what this series tries to do:

It tries to fix without a special caring for any specific features.