[PATCH v2 3/4] drm/ttm, drm/vmwgfx: Correctly support support AMD memory encryption

[Dave Hansen]

Thomas, this series has garnered a nak and a whole pile of thoroughly
confused reviewers.

Could you take another stab at this along with a more ample changelog
explaining the context of the problem?  I suspect that's a better place
to start than having us all piece together the disparate parts of the
thread.