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drm/xe: Taint TLB invalidation seqno lock with GFP_KERNEL

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Taint TLB invalidation seqno lock with GFP_KERNEL as TLB invalidations
can be in the path of reclaim (e.g., MMU notifiers).

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matt Atwood <matthew.s.atwood@intel.com>
Tested-by: Stuart Summers <stuart.summers@intel.com>
Link: https://patch.msgid.link/20260116221731.868657-7-matthew.brost@intel.com
This commit is contained in:
Matthew Brost 2026-01-16 14:17:26 -08:00
parent a3866ce7b1
commit 8d7a9f801e
1 changed files with 12 additions and 0 deletions
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12
drivers/gpu/drm/xe/xe_tlb_inval.c
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@ -111,6 +111,16 @@ static void tlb_inval_fini(struct drm_device *drm, void *arg)
xe_tlb_inval_reset(tlb_inval);
}
static void primelockdep(struct xe_tlb_inval *tlb_inval)
{
if (!IS_ENABLED(CONFIG_LOCKDEP))
return;
fs_reclaim_acquire(GFP_KERNEL);
might_lock(&tlb_inval->seqno_lock);
fs_reclaim_release(GFP_KERNEL);
}
/**
* xe_gt_tlb_inval_init - Initialize TLB invalidation state
* @gt: GT structure
@ -137,6 +147,8 @@ int xe_gt_tlb_inval_init_early(struct xe_gt *gt)
if (err)
return err;
primelockdep(tlb_inval);
tlb_inval->job_wq = drmm_alloc_ordered_workqueue(&xe->drm,
"gt-tbl-inval-job-wq",
WQ_MEM_RECLAIM);