+ Raghavendra Kakarla, Sebastian Andrzej Siewior On Mon, 27 May 2024 at 16:26, Ulf Hansson <ulf.hansson@xxxxxxxxxx> wrote: > > Updates in v2: > - Rebased and fixed a small issue in genpd, see patch3. > - Re-tested on v6.9-rt5 (PREEMPT_RT enabled) > - Re-tested on v6.10-rc1 (for regressions, PREEMPT_RT disabled) > > The hierarchical PM domain topology and the corresponding domain-idle-states > are currently disabled on a PREEMPT_RT based configuration. The main reason is > because spinlocks are turned into sleepable locks on PREEMPT_RT, which means > genpd and runtime PM can't be use in the atomic idle-path when > selecting/entering an idle-state. > > For s2idle/s2ram this is an unnecessary limitation that this series intends to > address. Note that, the support for cpuhotplug is left to future improvements. > More information about this are available in the commit messages. > > I have tested this on a Dragonboard 410c. > > Kind regards > Ulf Hansson > > > Ulf Hansson (7): > pmdomain: core: Enable s2idle for CPU PM domains on PREEMPT_RT > pmdomain: core: Don't hold the genpd-lock when calling > dev_pm_domain_set() > pmdomain: core: Use dev_name() instead of kobject_get_path() in > debugfs > cpuidle: psci-domain: Enable system-wide suspend on PREEMPT_RT > cpuidle: psci: Drop redundant assignment of CPUIDLE_FLAG_RCU_IDLE > cpuidle: psci: Enable the hierarchical topology for s2ram on > PREEMPT_RT > cpuidle: psci: Enable the hierarchical topology for s2idle on > PREEMPT_RT > > drivers/cpuidle/cpuidle-psci-domain.c | 10 ++-- > drivers/cpuidle/cpuidle-psci.c | 26 ++++++---- > drivers/pmdomain/core.c | 75 +++++++++++++++++++-------- > include/linux/pm_domain.h | 5 +- > 4 files changed, 80 insertions(+), 36 deletions(-) > Just wanted to let you all know that I have queued up this series via my pmdomain tree. Please let me know if you have any further comments/suggestions. Kind regards Uffe
