linux-kernel - [PATCH v2 0/5] PM: Fixes for Realtime systems

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Date:   Mon, 19 Dec 2022 16:14:58 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kevin Hilman <khilman@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Sudeep Holla <sudeep.holla@....com>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Adrien Thierry <athierry@...hat.com>,
        Brian Masney <bmasney@...hat.com>,
        linux-rt-users@...r.kernel.org
Subject: [PATCH v2 0/5] PM: Fixes for Realtime systems

Hi,

The goal is to make Linux kernel PM / PM domains / cpuidle friendlier for
Realtime systsems (PREEMPT_RT).  Realtime changes regular spinlocks into
sleeping primitives, thus other parts of the code must be ready for it.

Changes since v1
================
1. Patch #1: Add missing WARN for parent domain
2. New patches 3-5 for other issues encountered with PREEMPT_RT.

Best regards,
Krzysztof

---

Cc: Adrien Thierry <athierry@...hat.com>
Cc: Brian Masney <bmasney@...hat.com>
Cc: linux-rt-users@...r.kernel.org

Krzysztof Kozlowski (5):
  PM: domains: Add GENPD_FLAG_RT_SAFE for PREEMPT_RT
  cpuidle: psci: Mark as PREEMPT_RT safe
  cpuidle: psci: Do not suspend topology CPUs on PREEMPT_RT
  PM: Allow calling dev_pm_domain_set() with raw spinlock
  PM: domains: Do not call device_pm_check_callbacks() when holding
    genpd_lock()

 drivers/base/power/common.c           | 27 ++++++++++-
 drivers/base/power/domain.c           | 65 +++++++++++++++++++++++++--
 drivers/cpuidle/cpuidle-psci-domain.c |  3 +-
 drivers/cpuidle/cpuidle-psci.c        |  4 +-
 include/linux/pm_domain.h             | 16 +++++++
 5 files changed, 107 insertions(+), 8 deletions(-)

-- 
2.34.1