1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef __UAPI_CORESIGHT_STM_H_ 3 #define __UAPI_CORESIGHT_STM_H_ 4 5 #include <linux/const.h> 6 7 #define STM_FLAG_TIMESTAMPED _BITUL(3) 8 #define STM_FLAG_GUARANTEED _BITUL(7) 9 10 /* 11 * The CoreSight STM supports guaranteed and invariant timing 12 * transactions. Guaranteed transactions are guaranteed to be 13 * traced, this might involve stalling the bus or system to 14 * ensure the transaction is accepted by the STM. While invariant 15 * timing transactions are not guaranteed to be traced, they 16 * will take an invariant amount of time regardless of the 17 * state of the STM. 18 */ 19 enum { 20 STM_OPTION_GUARANTEED = 0, 21 STM_OPTION_INVARIANT, 22 }; 23 24 #endif 25