Daniel Lezcano 573f1e5902 cpuidle: psci: Fix cpuhotplug routine with PREEMPT_RT=y ... commit 621a88dbfe upstream. Currently cpu hotplug with the PREEMPT_RT option set in the kernel is not supported because the underlying generic power domain functions used in the cpu hotplug callbacks are incompatible from a lock point of view. This situation prevents the suspend to idle to reach the deepest idle state for the "cluster" as identified in the undermentioned commit. Use the compatible ones when PREEMPT_RT is enabled and remove the boolean disabling the hotplug callbacks with this option. With this change the platform can reach the deepest idle state allowing at suspend time to consume less power. Tested-on Lenovo T14s with the following script: echo 0 > /sys/devices/system/cpu/cpu3/online BEFORE=$(cat /sys/kernel/debug/pm_genpd/power-domain-cpu-cluster0/idle_states | grep S0 | awk '{ print $3 }') ; rtcwake -s 1 -m mem; AFTER=$(cat /sys/kernel/debug/pm_genpd/power-domain-cpu-cluster0/idle_states | grep S0 | awk '{ print $3 }'); if [ $BEFORE -lt $AFTER ]; then echo "Test successful" else echo "Test failed" fi echo 1 > /sys/devices/system/cpu/cpu3/online Fixes: 1c4b2932bd ("cpuidle: psci: Enable the hierarchical topology for s2idle on PREEMPT_RT") Cc: Raghavendra Kakarla <quic_rkakarla@quicinc.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20250709154728.733920-1-daniel.lezcano@linaro.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2025-07-24 08:56:25 +02:00
..
governors	cpuidle: menu: Avoid discarding useful information	2025-05-29 11:02:38 +02:00
coupled.c	cpuidle: Avoid explicit cpumask allocation on stack	2024-04-24 21:23:49 +02:00
cpuidle-arm.c
cpuidle-at91.c
cpuidle-big_little.c
cpuidle-calxeda.c
cpuidle-clps711x.c
cpuidle-cps.c
cpuidle-exynos.c
cpuidle-haltpoll.c	cpuidle: haltpoll: add missing MODULE_DESCRIPTION() macro	2024-06-14 18:15:38 +02:00
cpuidle-kirkwood.c	cpuidle: kirkwood: Convert to platform remove callback returning void	2024-04-23 09:21:48 +02:00
cpuidle-mvebu-v7.c
cpuidle-powernv.c
cpuidle-psci-domain.c	cpuidle: psci: Simplify with scoped for each OF child loop	2024-08-20 11:30:39 +02:00
cpuidle-psci.c	cpuidle: psci: Fix cpuhotplug routine with PREEMPT_RT=y	2025-07-24 08:56:25 +02:00
cpuidle-psci.h
cpuidle-pseries.c
cpuidle-qcom-spm.c
cpuidle-riscv-sbi.c	cpuidle: riscv-sbi: fix device node release in early exit of for_each_possible_cpu	2025-01-17 13:40:44 +01:00
cpuidle-tegra.c
cpuidle-ux500.c
cpuidle-zynq.c
cpuidle.c	cpuidle: remove dead code from cpuidle_enter_state()	2024-08-22 21:03:52 +02:00
cpuidle.h
driver.c
dt_idle_genpd.c	cpuidle: dt_idle_genpd: Simplify with scoped for each OF child loop	2024-08-20 11:30:39 +02:00
dt_idle_genpd.h
dt_idle_states.c
dt_idle_states.h
governor.c
Kconfig
Kconfig.arm
Kconfig.mips
Kconfig.powerpc
Kconfig.riscv
Makefile
poll_state.c
sysfs.c