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feat(drtm): log No-Action Event in Event Log for DRTM measurements

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This patch updates `drtm_measurements.c` to ensure that a No-Action
event is recorded in the Event Log as part of the DRTM measurement
process.
This helps maintain compliance with the event logging requirements
specified in DRTM spec v1.1 [1].

[1]: https://developer.arm.com/documentation/den0113/c/?lang=en

Change-Id: Ifcf25b7ec91393a0c91b05e30f1f6cc4960d5634
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
This commit is contained in:
Manish V Badarkhe 2025-02-26 12:40:26 +00:00
parent 1733deb46c
commit 2ec44880d0
1 changed files with 5 additions and 1 deletions
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6
services/std_svc/drtm/drtm_measurements.c
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2022 Arm Limited. All rights reserved.
* Copyright (c) 2022-2025 Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*
@ -198,6 +198,10 @@ enum drtm_retc drtm_take_measurements(const struct_drtm_dl_args *a)
PCR_18);
CHECK_RC(rc,
drtm_event_log_measure_and_record(DRTM_EVENT_ARM_SEPARATOR));
/* Measure no Action event but not extend it in PCR */
CHECK_RC(rc,
drtm_event_log_measure_and_record(DRTM_EVENT_ARM_NO_ACTION));
/*
* If the DCE is unable to log a measurement because there is no available
* space in the event log region, the DCE must extend a hash of the value