> > > > To comply with the design that buffer objects shall have immutable > > > > cache setting through out their life cycle, {set, get}_caching ioctl's > > > > are no longer supported from MTL onward. With that change caching > > > > policy can only be set at object creation time. The current code > > > > applies a default (platform dependent) cache setting for all objects. > > > > However this is not optimal for performance tuning. The patch extends > > > > the existing gem_create uAPI to let user set PAT index for the object > > > > at creation time. > > > > The new extension is platform independent, so UMD's can switch to using > > > > this extension for older platforms as well, while {set, get}_caching are > > > > still supported on these legacy paltforms for compatibility reason. > > > > However, since PAT index was not clearly defined for platforms prior to > > > > GEN12 (TGL), so we are limiting this externsion to GEN12+ platforms > > > > only. See ext_set_pat() in for the implementation details. > > > > > > > > Note: The documentation related to the PAT/MOCS tables is currently > > > > available for Tiger Lake here: > > > > https://www.intel.com/content/www/us/en/docs/graphics-for-linux/developer-reference/1-0/tiger-lake.html > > > > > > > > BSpec: 45101 > > > > > > > > Mesa support has been submitted in this merge request: > > > > https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22878 > > > > > > > > The media driver is supported by the following commits: > > > > https://github.com/intel/media-driver/commit/92c00a857433ebb34ec575e9834f473c6fcb6341 > > > > https://github.com/intel/media-driver/commit/fd375cf2c5e1f6bf6b43258ff797b3134aadc9fd > > > > https://github.com/intel/media-driver/commit/08dd244b22484770a33464c2c8ae85430e548000 > > Andi, let's still get these corrected before merging once the media-driver > revert is completed. Sure! At least this doesn't need a new version to be respinned. Please, Carl, link the new pull request and I will update the commit log. Andi