[Intel-gfx] [PATCH 5/5] drm/i915/userptr: Enable read-only support on gen8+

[Joonas Lahtinen]

On Thu, 2018-05-31 at 12:35 +0100, Chris Wilson wrote:
> On gen8 and onwards, we can mark GPU accesses through the ppGTT as being
> read-only, that is cause any GPU write onto that page to be discarded
> (not triggering a fault). This is all that we need to finally support
> the read-only flag for userptr!
> 
> Testcase: igt/gem_userptr_blits/readonly*
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Jon Bloomfield <jon.bloomfield at intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>

Please add clarification to the commit message that this expands uAPI
(by supporting RO userptrs), so Rodrigo will notice to highlight for
-next PR.

Reviewed-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>

Regards, Joonas
-- 
Joonas Lahtinen
Open Source Technology Center
Intel Corporation