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 <chris@xxxxxxxxxxxxxxxxxx> Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx> Cc: Matthew Auld <matthew.william.auld@xxxxxxxxx> --- 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 75c8cb75a0ce..51352b90de2b 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -3458,7 +3458,9 @@ 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)) << PAGE_SHIFT; - ggtt->vm.clear_range = gen6_ggtt_clear_range; + ggtt->vm.clear_range = nop_clear_range; + if (!USES_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; -- 2.17.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
