On Fri, 26 Oct 2012 10:08:38 -0700, Jesse Barnes <jbarnes at virtuousgeek.org> wrote: > The BIOS shouldn't be touching this memory across suspend/resume, so > just leave it alone. This saves us ~50ms on resume on my T420. > > v2: change gtt restore default on pre-gen4 (Chris) > move needs_gtt_restore flag into dev_priv I'm confident that it will work on gen3 now as well, just gen2 remains doubtful. Hmm, I still have the pnv box that required the GTT rewrite after resume on my desk... Perhaps a more explicit test for a "sane" BIOS would be one that provides OpRegion. -Chris -- Chris Wilson, Intel Open Source Technology Centre
