[Intel-gfx] [PATCH v8 1/7] drm/i915: initialize unused MOCS entries to PTE

[Chris Wilson]

Quoting Lucas De Marchi (2019-01-22 05:12:21)
> Instead of initializing them to uncached, let's set them to PTE for
> kernel tracking. While at it do some minor adjustments to comments and
> coding style.
> 
> Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>

I'm in favour. I do not think this contributes an ABI change, as these
values are explicitly outside of the ABI. What it does mean is that the
buffer contents are consistent with our cache tracking; and for
userspace the results were always undefined. So we should at least be
able to guarantee that the data written by userspace from the CPU is
visible. After that, your caches are on your own.

Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris