[PATCH v4 2/2] drm/xe/guc: Preserve HW error state in wedged mode 2

[Zhanjun Dong <zhanjun.dong@intel.com>]

When HW reports an uncorrectable error, debugging the root cause may
require halting the GPU in the error state so scan dumps can be collected
and inspected.

Use wedged_mode=2 for this debug mode. In this mode, Xe already avoids GPU
reset on hangs, so also skip the engine reset cleanup path for GuC
uncorrectable error reports to keep the HW state intact.

Signed-off-by: Zhanjun Dong <zhanjun.dong@intel.com>
---
 drivers/gpu/drm/xe/xe_guc_submit.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_guc_submit.c b/drivers/gpu/drm/xe/xe_guc_submit.c
index 29ccabc4b7a4..05fa4e466461 100644
--- a/drivers/gpu/drm/xe/xe_guc_submit.c
+++ b/drivers/gpu/drm/xe/xe_guc_submit.c
@@ -3024,8 +3024,10 @@ int xe_guc_uncorrectable_error_handler(struct xe_guc *guc, u32 *msg, u32 len)
 
 	trace_xe_guc_uncorrectable_error(q);
 
-	/* Treat the same as engine reset */
-	xe_guc_exec_queue_reset_trigger_cleanup(q);
+	if (guc_to_xe(guc)->wedged.mode != XE_WEDGED_MODE_UPON_ANY_HANG_NO_RESET) {
+		/* Treat the same as engine reset */
+		xe_guc_exec_queue_reset_trigger_cleanup(q);
+	}
 
 	return 0;
 }
-- 
2.34.1