CONFIG_ARM_PSCI_CPUIDLE: PSCI CPU idle Driver

General informations

The Linux kernel configuration item CONFIG_ARM_PSCI_CPUIDLE:

• prompt: PSCI CPU idle Driver
• type: bool
• depends on: CONFIG_ARM_PSCI_FW
• defined in drivers/cpuidle/Kconfig.arm
• found in Linux kernels: 5.4–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

Select this to enable PSCI firmware based CPUidle driver for ARM. It provides an idle driver that is capable of detecting and managing idle states through the PSCI firmware interface.

The driver has limitations when used with PREEMPT_RT: - If the idle states are described with the non-hierarchical layout, all idle states are still available.

- If the idle states are described with the hierarchical layout, only the idle states defined per CPU are available, but not the ones being shared among a group of CPUs (aka cluster idle states).

Hardware

LKDDb

Raw data from LKDDb:

• lkddb of "" "" "arm,idle-state" : CONFIG_ARM_PSCI_CPUIDLE CONFIG_CPU_IDLE : drivers/cpuidle/cpuidle-psci.c # in 5.4–5.19, 6.0–6.8, 6.9-rc+HEAD
• lkddb of "" "" "arm,psci-1.0" : CONFIG_ARM_PSCI_CPUIDLE CONFIG_CPU_IDLE CONFIG_PM_GENERIC_DOMAINS_OF : drivers/cpuidle/cpuidle-psci-domain.c # in 5.6–5.8
• lkddb platform "psci-cpuidle" : CONFIG_ARM_PSCI_CPUIDLE CONFIG_CPU_IDLE : drivers/cpuidle/cpuidle-psci.c # in 5.9–5.19, 6.0–6.8, 6.9-rc+HEAD

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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