cpuidle: psci: Support CPU hotplug for the hierarchical model
When the hierarchical CPU topology is used and when a CPU is put offline, that CPU prevents its PM domain from being powered off, which is because genpd observes the corresponding attached device as being active from a runtime PM point of view. Furthermore, any potential master PM domains are also prevented from being powered off. To address this limitation, let's add add a new CPU hotplug state (CPUHP_AP_CPU_PM_STARTING) and register up/down callbacks for it, which allows us to deal with runtime PM accordingly. Signed-off-by:Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by:
Sudeep Holla <sudeep.holla@arm.com> Acked-by:
Rafael J. Wysocki <rafael@kernel.org>
Showing
Please register or sign in to comment