diff options
| author | Matthew Brost <matthew.brost@intel.com> | 2026-01-09 17:27:38 -0800 |
|---|---|---|
| committer | Matthew Brost <matthew.brost@intel.com> | 2026-01-10 13:39:52 -0800 |
| commit | efffd56e4bd894e0935eea00e437f233b6cebc0d (patch) | |
| tree | 1f2fae2ef7d47ae14bb5eaff6b9cb4ef135081b6 | |
| parent | ddb5cf9b90c5201a833d5d65f96b359bf3acdd90 (diff) | |
drm/xe: Disable timestamp WA on VFs
The timestamp WA does not work on a VF because it requires reading MMIO
registers, which are inaccessible on a VF. This timestamp WA confuses
LRC sampling on a VF during TDR, as the LRC timestamp would always read
as 1 for any active context. Disable the timestamp WA on VFs to avoid
this confusion.
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Fixes: 617d824c5323 ("drm/xe: Add WA BB to capture active context utilization")
Link: https://patch.msgid.link/20260110012739.2888434-7-matthew.brost@intel.com
| -rw-r--r-- | drivers/gpu/drm/xe/xe_lrc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_lrc.c b/drivers/gpu/drm/xe/xe_lrc.c index 70eae7d03a27..bf27fc9eebd3 100644 --- a/drivers/gpu/drm/xe/xe_lrc.c +++ b/drivers/gpu/drm/xe/xe_lrc.c @@ -1068,6 +1068,9 @@ static ssize_t setup_utilization_wa(struct xe_lrc *lrc, { u32 *cmd = batch; + if (IS_SRIOV_VF(gt_to_xe(lrc->gt))) + return 0; + if (xe_gt_WARN_ON(lrc->gt, max_len < 12)) return -ENOSPC; |