Commit c0a7f818 authored Dec 30, 2013 by Chris Wilson Committed by Daniel Vetter Jan 07, 2014

drm/i915: Mention when we enable the Ironlake iommu workarounds



The iommu and gfx on Ironlake do not like each other and require a
big hammer to prevent hard machine hangs. In

commit 5c042287
Author: Ben Widawsky <ben@bwidawsk.net>
Date:   Mon Oct 17 15:51:55 2011 -0700

    drm/i915: ILK + VT-d workaround

we added the workaround, but never emitted any debug message that it was
active. Doing so should help identify known performance regressions.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

parent 3ec2f427

drivers/gpu/drm/i915/i915_gem_gtt.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1438,6 +1438,9 @@ static int i915_gmch_probe(struct drm_device *dev,
		dev_priv->gtt.base.clear_range = i915_ggtt_clear_range;
		dev_priv->gtt.base.insert_entries = i915_ggtt_insert_entries;

		if (unlikely(dev_priv->gtt.do_idle_maps))
		DRM_INFO("applying Ironlake quirks for intel_iommu\n");

		return 0;
		}