Re: [PATCH] swiotlb: Validate bounce size in the sync/unmap path

On Mon, Jan 18, 2021 at 12:44:58PM +0100, Martin Radev wrote:

Your comment makes sense but then that would require the cooperation
of these vendors and the cloud providers to agree on something meaningful.
I am also not sure whether the end result would be better than hardening
this interface to catch corruption. There is already some validation in
unmap path anyway.

So what?  If you guys want to provide a new capability you'll have to do
work.  And designing a new protocol based around the fact that the
hardware/hypervisor is not trusted and a copy is always required makes
a lot of more sense than throwing in band aids all over the place.
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