drm/amdkfd: range check cp bad op exception interrupts

Due to a CP interrupt bug, bad packet garbage exception codes are raised.
Do a range check so that the debugger and runtime do not receive garbage
codes.
Update the user api to guard exception code type checking as well.

Signed-off-by: Jonathan Kim <[email protected]>
Tested-by: Jesse Zhang <[email protected]>
Reviewed-by: Felix Kuehling <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: jokim-amd

drivers/gpu/drm/amd/amdkfd/kfd_int_process_v10.c

@@ -339,7 +339,8 @@ static void event_interrupt_wq_v10(struct kfd_node *dev,
 				break;
 			}
 			kfd_signal_event_interrupt(pasid, context_id0 & 0x7fffff, 23);
-		} else if (source_id == SOC15_INTSRC_CP_BAD_OPCODE) {
+		} else if (source_id == SOC15_INTSRC_CP_BAD_OPCODE &&
+			   KFD_DBG_EC_TYPE_IS_PACKET(KFD_DEBUG_CP_BAD_OP_ECODE(context_id0))) {
 			kfd_set_dbg_ev_from_interrupt(dev, pasid,
 				KFD_DEBUG_DOORBELL_ID(context_id0),
 				KFD_EC_MASK(KFD_DEBUG_CP_BAD_OP_ECODE(context_id0)),

drivers/gpu/drm/amd/amdkfd/kfd_int_process_v11.c

@@ -328,7 +328,8 @@ static void event_interrupt_wq_v11(struct kfd_node *dev,
 		/* CP */
 		if (source_id == SOC15_INTSRC_CP_END_OF_PIPE)
 			kfd_signal_event_interrupt(pasid, context_id0, 32);
-		else if (source_id == SOC15_INTSRC_CP_BAD_OPCODE)
+		else if (source_id == SOC15_INTSRC_CP_BAD_OPCODE &&
+			 KFD_DBG_EC_TYPE_IS_PACKET(KFD_CTXID0_CP_BAD_OP_ECODE(context_id0)))
 			kfd_set_dbg_ev_from_interrupt(dev, pasid,
 				KFD_CTXID0_DOORBELL_ID(context_id0),
 				KFD_EC_MASK(KFD_CTXID0_CP_BAD_OP_ECODE(context_id0)),

drivers/gpu/drm/amd/amdkfd/kfd_int_process_v9.c

@@ -388,7 +388,8 @@ static void event_interrupt_wq_v9(struct kfd_node *dev,
 				break;
 			}
 			kfd_signal_event_interrupt(pasid, sq_int_data, 24);
-		} else if (source_id == SOC15_INTSRC_CP_BAD_OPCODE) {
+		} else if (source_id == SOC15_INTSRC_CP_BAD_OPCODE &&
+			   KFD_DBG_EC_TYPE_IS_PACKET(KFD_DEBUG_CP_BAD_OP_ECODE(context_id0))) {
 			kfd_set_dbg_ev_from_interrupt(dev, pasid,
 				KFD_DEBUG_DOORBELL_ID(context_id0),
 				KFD_EC_MASK(KFD_DEBUG_CP_BAD_OP_ECODE(context_id0)),

include/uapi/linux/kfd_ioctl.h

@@ -913,14 +913,25 @@ enum kfd_dbg_trap_exception_code {
 				 KFD_EC_MASK(EC_DEVICE_NEW))
 #define KFD_EC_MASK_PROCESS	(KFD_EC_MASK(EC_PROCESS_RUNTIME) |	\
 				 KFD_EC_MASK(EC_PROCESS_DEVICE_REMOVE))
+#define KFD_EC_MASK_PACKET	(KFD_EC_MASK(EC_QUEUE_PACKET_DISPATCH_DIM_INVALID) |	\
+				 KFD_EC_MASK(EC_QUEUE_PACKET_DISPATCH_GROUP_SEGMENT_SIZE_INVALID) |	\
+				 KFD_EC_MASK(EC_QUEUE_PACKET_DISPATCH_CODE_INVALID) |	\
+				 KFD_EC_MASK(EC_QUEUE_PACKET_RESERVED) |	\
+				 KFD_EC_MASK(EC_QUEUE_PACKET_UNSUPPORTED) |	\
+				 KFD_EC_MASK(EC_QUEUE_PACKET_DISPATCH_WORK_GROUP_SIZE_INVALID) |	\
+				 KFD_EC_MASK(EC_QUEUE_PACKET_DISPATCH_REGISTER_INVALID) |	\
+				 KFD_EC_MASK(EC_QUEUE_PACKET_VENDOR_UNSUPPORTED))
 
 /* Checks for exception code types for KFD search */
+#define KFD_DBG_EC_IS_VALID(ecode) (ecode > EC_NONE && ecode < EC_MAX)
 #define KFD_DBG_EC_TYPE_IS_QUEUE(ecode)					\
-			(!!(KFD_EC_MASK(ecode) & KFD_EC_MASK_QUEUE))
+			(KFD_DBG_EC_IS_VALID(ecode) && !!(KFD_EC_MASK(ecode) & KFD_EC_MASK_QUEUE))
 #define KFD_DBG_EC_TYPE_IS_DEVICE(ecode)				\
-			(!!(KFD_EC_MASK(ecode) & KFD_EC_MASK_DEVICE))
+			(KFD_DBG_EC_IS_VALID(ecode) && !!(KFD_EC_MASK(ecode) & KFD_EC_MASK_DEVICE))
 #define KFD_DBG_EC_TYPE_IS_PROCESS(ecode)				\
-			(!!(KFD_EC_MASK(ecode) & KFD_EC_MASK_PROCESS))
+			(KFD_DBG_EC_IS_VALID(ecode) && !!(KFD_EC_MASK(ecode) & KFD_EC_MASK_PROCESS))
+#define KFD_DBG_EC_TYPE_IS_PACKET(ecode)				\
+			(KFD_DBG_EC_IS_VALID(ecode) && !!(KFD_EC_MASK(ecode) & KFD_EC_MASK_PACKET))
 
 
 /* Runtime enable states */