include/uapi/linux/coresight-stm.h

   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 #define STM_FLAG_TIMESTAMPED   BIT(3)
   6 #define STM_FLAG_GUARANTEED    BIT(7)
   7
   8 /*
   9  * The CoreSight STM supports guaranteed and invariant timing
  10  * transactions.  Guaranteed transactions are guaranteed to be
  11  * traced, this might involve stalling the bus or system to
  12  * ensure the transaction is accepted by the STM.  While invariant
  13  * timing transactions are not guaranteed to be traced, they
  14  * will take an invariant amount of time regardless of the
  15  * state of the STM.
  16  */
  17 enum {
  18         STM_OPTION_GUARANTEED = 0,
  19         STM_OPTION_INVARIANT,
  20 };
  21
  22 #endif