This is a note to let you know that I've just added the patch titled
i915/pmu: Move execlist stats initialization to execlist specific setup
to the 6.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
i915-pmu-move-execlist-stats-initialization-to-execl.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 2609752bf1b64e7b73a8e57a54e3c41c3fb5218e
Author: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx>
Date: Tue Sep 12 14:22:47 2023 -0700
i915/pmu: Move execlist stats initialization to execlist specific setup
[ Upstream commit c524cd40e8a2a1a36f4898eaf2024beefeb815f3 ]
engine->stats is a union of execlist and guc stat objects. When execlist
specific fields are initialized, the initial state of guc stats is
affected. This results in bad busyness values when using GuC mode. Move
the execlist initialization from common code to execlist specific code.
Fixes: 77cdd054dd2c ("drm/i915/pmu: Connect engine busyness stats from GuC to pmu")
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx>
Reviewed-by: Alan Previn <alan.previn.teres.alexis@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230912212247.1828681-1-umesh.nerlige.ramappa@xxxxxxxxx
(cherry picked from commit 4485bd519f5d6d620a29d0547ff3c982bdeeb468)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index 0aff5bb13c538..0e81ea6191c64 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -558,7 +558,6 @@ static int intel_engine_setup(struct intel_gt *gt, enum intel_engine_id id,
DRIVER_CAPS(i915)->has_logical_contexts = true;
ewma__engine_latency_init(&engine->latency);
- seqcount_init(&engine->stats.execlists.lock);
ATOMIC_INIT_NOTIFIER_HEAD(&engine->context_status_notifier);
diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
index 2ebd937f3b4cb..082c973370824 100644
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
@@ -3550,6 +3550,8 @@ int intel_execlists_submission_setup(struct intel_engine_cs *engine)
logical_ring_default_vfuncs(engine);
logical_ring_default_irqs(engine);
+ seqcount_init(&engine->stats.execlists.lock);
+
if (engine->flags & I915_ENGINE_HAS_RCS_REG_STATE)
rcs_submission_override(engine);
