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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 */
19enum {
20 STM_OPTION_GUARANTEED = 0,
21 STM_OPTION_INVARIANT,
22};
23
24#endif