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fix(psci): check if a core is the last one in a requested power level

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PSCI OS initiated is usually implemented with the extended state id
format, however this does not have to be the case. When this is the
case, the original format will carry the requested power level in
the PowerLevel field. To validate that the requested power state is
valid we must save it so that later when we call
psci_is_last_cpu_to_idle_at_pwrlvl() it checks the right level (instead
of a default 0).

This came up when testing 01959a1656 for
all configurations.

Change-Id: Iaab88c1910467282ae524861446283acddd9d977
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
This commit is contained in:
Boyan Karatotev 2025-01-31 16:26:08 +00:00
parent 0c370e2d59
commit 71d4e03444
1 changed files with 5 additions and 1 deletions

6
plat/arm/common/arm_pm.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2015-2024, Arm Limited and Contributors. All rights reserved.
* Copyright (c) 2015-2025, Arm Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -56,6 +56,10 @@ int arm_validate_power_state(unsigned int power_state,
if (psci_get_pstate_id(power_state) != 0U)
return PSCI_E_INVALID_PARAMS;
#if PSCI_OS_INIT_MODE
req_state->last_at_pwrlvl = psci_get_pstate_pwrlvl(power_state);
#endif /* __PSCI_OS_INIT_MODE__ */
return PSCI_E_SUCCESS;
}