Re: [PATCH] drm/i915/gt: Prefer local execution_mask for determing viable engines

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On 27/01/2021 09:06, Chris Wilson wrote:
In gen8_emit_flush_xcs, we have to look at all the engines the request
may execute on, and emit an aux-invalidate for each. Currently, we
handle the virtual engine by looking at its engine mask, but that is
copied and refined as the request->execution_mask. If we prefer the
local mask, this is one fewer rq->engine pointer chasing we have to
eliminate later when we remove rq->engine.

Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
  drivers/gpu/drm/i915/gt/gen8_engine_cs.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
index 07ba524da90b..cac80af7ad1c 100644
--- a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
@@ -277,7 +277,7 @@ int gen12_emit_flush_xcs(struct i915_request *rq, u32 mode)
  	if (mode & EMIT_INVALIDATE)
  		cmd += 2;
  	if (mode & EMIT_INVALIDATE)
-		aux_inv = rq->engine->mask & ~BIT(BCS0);
+		aux_inv = rq->execution_mask & ~BIT(BCS0);
  	if (aux_inv)
  		cmd += 2 * hweight8(aux_inv) + 2;

Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>

Regards,

Tvrtko
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