[Intel-gfx] [PATCH v2 4/5] drm/i915: Dispatch the shadow batch buffer

[bradley.d.volkin at intel.com]

From: Brad Volkin <bradley.d.volkin at intel.com>

This is useful for testing the batch pool code with aliasing PPGTT.
It doesn't work with full PPGTT though; the GPU hangs and the whole
UI is corrupted. We need fixes for the secure dispatch path to
enable this for real.

v2: rebase on shadow_batch_obj replacing batch_obj

Signed-off-by: Brad Volkin <bradley.d.volkin at intel.com>
---
 drivers/gpu/drm/i915/i915_gem_execbuffer.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 4c4bd66..908cf48 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -1401,13 +1401,12 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
 		batch_obj = shadow_batch_obj;
 
 		/*
-		 * XXX: Actually do this when enabling batch copy...
-		 *
 		 * Set the DISPATCH_SECURE bit to remove the NON_SECURE bit
 		 * from MI_BATCH_BUFFER_START commands issued in the
 		 * dispatch_execbuffer implementations. We specifically don't
 		 * want that set when the command parser is enabled.
 		 */
+		flags |= I915_DISPATCH_SECURE;
 	}
 
 	/* snb/ivb/vlv conflate the "batch in ppgtt" bit with the "non-secure
-- 
1.8.3.2