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