feat(psci): add API to get number of CPUs currently in ON state
Introduce a new PSCI helper function `psci_num_cpus_running_on_safe()`
to return the number of CPUs that are currently in the ON state.
This API locks the PSCI power state data to ensure consistency and
is safe to call in concurrent environments.
This utility can assist components that need to reason about system
CPU activity or coordinate operations based on active CPUs.
Change-Id: Ie15aa4bd393a5f01e7cd80ae8a9b28707fde7c53
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
diff --git a/include/lib/psci/psci_lib.h b/include/lib/psci/psci_lib.h
index 8c9296b..1e1d5fc 100644
--- a/include/lib/psci/psci_lib.h
+++ b/include/lib/psci/psci_lib.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2017-2024, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2025, Arm Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -98,6 +98,7 @@
void __dead2 psci_pwrdown_cpu_end_terminal(void);
void psci_pwrdown_cpu_end_wakeup(unsigned int power_level);
void psci_do_manage_extensions(void);
+unsigned int psci_num_cpus_running_on_safe(unsigned int this_core);
#endif /* __ASSEMBLER__ */