6.11-stable review patch. If anyone has any objections, please let me know.
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From: Nirmoy Das nirmoy.das@intel.com
[ Upstream commit 1491efb39acee3848b61fcb3e5cc4be8de304352 ]
Flush the g2h worker explicitly if TLB timeout happens which is observed on LNL and that points to the recent scheduling issue with E-cores on LNL.
This is similar to the recent fix: commit e51527233804 ("drm/xe/guc/ct: Flush g2h worker in case of g2h response timeout") and should be removed once there is E core scheduling fix.
v2: Add platform check(Himal) v3: Remove gfx platform check as the issue related to cpu platform(John) Use the common WA macro(John) and print when the flush resolves timeout(Matt B) v4: Remove the resolves log and do the flush before taking pending_lock(Matt A)
Cc: Badal Nilawar badal.nilawar@intel.com Cc: Matthew Brost matthew.brost@intel.com Cc: Matthew Auld matthew.auld@intel.com Cc: John Harrison John.C.Harrison@Intel.com Cc: Himal Prasad Ghimiray himal.prasad.ghimiray@intel.com Cc: Lucas De Marchi lucas.demarchi@intel.com Cc: stable@vger.kernel.org # v6.11+ Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2687 Signed-off-by: Nirmoy Das nirmoy.das@intel.com Reviewed-by: Matthew Auld matthew.auld@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20241029120117.449694-3-nirmoy... Signed-off-by: Lucas De Marchi lucas.demarchi@intel.com (cherry picked from commit e1f6fa55664a0eeb0a641f497e1adfcf6672e995) Signed-off-by: Lucas De Marchi lucas.demarchi@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c b/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c index 82795133e129e..836c15253ce7e 100644 --- a/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c +++ b/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c @@ -71,6 +71,8 @@ static void xe_gt_tlb_fence_timeout(struct work_struct *work) struct xe_device *xe = gt_to_xe(gt); struct xe_gt_tlb_invalidation_fence *fence, *next;
+ LNL_FLUSH_WORK(>->uc.guc.ct.g2h_worker); + spin_lock_irq(>->tlb_invalidation.pending_lock); list_for_each_entry_safe(fence, next, >->tlb_invalidation.pending_fences, link) {