tree a25d5167c39e758868b7add29ac7b87596eefde7
parent 83bf6d55c132d5c4f773e5a04149c05f4aa0c2ad
author Michał Winiarski <michal.winiarski@intel.com> 1486497359 +0100
committer Jani Nikula <jani.nikula@intel.com> 1486553248 +0200

drm/i915: Always convert incoming exec offsets to non-canonical

We're using non-canonical addresses in drm_mm, and we're making sure that
userspace is using canonical addressing - both in case of softpin
(verifying incoming offset) and when relocating (converting to canonical
when updating offset returned to userspace).
Unfortunately when considering the need for relocations, we're comparing
offset from userspace (in canonical form) with drm_mm node (in
non-canonical form), and as a result, we end up always relocating if our
offsets are in the "problematic" range.
Let's always convert the offsets to avoid the performance impact of
relocations.

Fixes: a5f0edf63bdf ("drm/i915: Avoid writing relocs with addresses in non-canonical form")
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michel Thierry <michel.thierry@intel.com>
Reported-by: Michał Pyrzowski <michal.pyrzowski@intel.com>
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170207195559.18798-1-michal.winiarski@intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
(cherry picked from commit 038c95a313e4ca954ee5ab8a0c7559a646b0f462)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>