From 267e80ee6a341bc694406ef7c4f30fa2721610b7 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Fri, 19 Apr 2019 21:12:07 +0100 Subject: [PATCH] drm/i915/gtt: Skip clearing the GGTT under gen6+ full-ppgtt If we know that the user cannot access the GGTT, by virtue of having a segregated memory area, we can skip clearing the unused entries as they cannot be accessed. Signed-off-by: Chris Wilson Cc: Joonas Lahtinen Cc: Mika Kuoppala Cc: Matthew Auld Reviewed-by: Matthew Auld Link: https://patchwork.freedesktop.org/patch/msgid/20190419201207.5477-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_gem_gtt.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 8f460cc4cc1f..10558bc8bf90 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -3280,7 +3280,9 @@ static int gen6_gmch_probe(struct i915_ggtt *ggtt) size = gen6_get_total_gtt_size(snb_gmch_ctl); ggtt->vm.total = (size / sizeof(gen6_pte_t)) * I915_GTT_PAGE_SIZE; - ggtt->vm.clear_range = gen6_ggtt_clear_range; + ggtt->vm.clear_range = nop_clear_range; + if (!HAS_FULL_PPGTT(dev_priv) || intel_scanout_needs_vtd_wa(dev_priv)) + ggtt->vm.clear_range = gen6_ggtt_clear_range; ggtt->vm.insert_page = gen6_ggtt_insert_page; ggtt->vm.insert_entries = gen6_ggtt_insert_entries; ggtt->vm.cleanup = gen6_gmch_remove; -- 2.39.5