Commit e9dea328 authored by Satyanarayana K V P's avatar Satyanarayana K V P Committed by Michal Wajdeczko
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drm/xe: Introduce fault injection for guc mmio send/recv. 



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: default avatarSatyanarayana K V P <satyanarayana.k.v.p@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Michał Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://lore.kernel.org/r/20250403120641.7258-2-satyanarayana.k.v.p@intel.com
parent 73bf722b

drivers/gpu/drm/xe/xe_guc.c

+1 −0
Original line number Diff line number Diff line
@@ -1394,6 +1394,7 @@ int xe_guc_mmio_send_recv(struct xe_guc *guc, const u32 *request, 
	/* 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)

{