[PATCH 17/17] RFT drm/i915/gtt: Enable full-ppgtt by default everywhere

From: Chris Wilson <chris@chris-wilson.co.uk>
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH 17/17] RFT drm/i915/gtt: Enable full-ppgtt by default everywhere
Date: Wed,  6 Jun 2018 07:27:10 +0100	[thread overview]
Message-ID: <20180606062710.29984-18-chris@chris-wilson.co.uk> (raw)
In-Reply-To: <20180606062710.29984-1-chris@chris-wilson.co.uk>

Let's see if we have all the kinks worked out and full-ppgtt now works
reliably on gen7 (Ivybridge, Valleyview/Baytrail and Haswell). If we can
let userspace have full control over their own ppgtt, it makes softpinning
far more effective, in turn making GPU dispatch far more efficient and
more secure (due to better mm segregation).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_gem_gtt.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 81e846664fdf..314b7b29a5a3 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -179,13 +179,11 @@ int intel_sanitize_enable_ppgtt(struct drm_i915_private *dev_priv,
 		return 0;
 	}
 
-	if (HAS_LOGICAL_RING_CONTEXTS(dev_priv)) {
-		if (has_full_48bit_ppgtt)
-			return 3;
+	if (has_full_48bit_ppgtt)
+		return 3;
 
-		if (has_full_ppgtt)
-			return 2;
-	}
+	if (has_full_ppgtt)
+		return 2;
 
 	return 1;
 }
-- 
2.17.1

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