From e9dea328e8392d01b21544587cbcf313e4fdbe26 Mon Sep 17 00:00:00 2001 From: Satyanarayana K V P Date: Thu, 3 Apr 2025 17:36:40 +0530 Subject: [PATCH] drm/xe: Introduce fault injection for guc mmio send/recv. MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Fault can be injected with below steps. FAILTYPE=fail_function FAILFUNC=xe_guc_mmio_send_recv echo > /sys/kernel/debug/$FAILTYPE/inject echo $FAILFUNC > /sys/kernel/debug/$FAILTYPE/inject printf %#x -5 > /sys/kernel/debug/$FAILTYPE/$FAILFUNC/retval echo N > /sys/kernel/debug/$FAILTYPE/task-filter echo 10 > /sys/kernel/debug/$FAILTYPE/probability echo 0 > /sys/kernel/debug/$FAILTYPE/interval echo -1 > /sys/kernel/debug/$FAILTYPE/times echo 0 > /sys/kernel/debug/$FAILTYPE/space echo 1 > /sys/kernel/debug/$FAILTYPE/verbose Signed-off-by: Satyanarayana K V P Cc: Matthew Brost Cc: Michał Wajdeczko Reviewed-by: Michal Wajdeczko Signed-off-by: Michal Wajdeczko Link: https://lore.kernel.org/r/20250403120641.7258-2-satyanarayana.k.v.p@intel.com --- drivers/gpu/drm/xe/xe_guc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c index 38866135c019..c5aace59b62c 100644 --- a/drivers/gpu/drm/xe/xe_guc.c +++ b/drivers/gpu/drm/xe/xe_guc.c @@ -1394,6 +1394,7 @@ proto: /* Use data from the GuC response as our return value */ return FIELD_GET(GUC_HXG_RESPONSE_MSG_0_DATA0, header); } +ALLOW_ERROR_INJECTION(xe_guc_mmio_send_recv, ERRNO); int xe_guc_mmio_send(struct xe_guc *guc, const u32 *request, u32 len) { -- 2.50.1