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Message-ID: <CAJZ5v0iTbaZyAOqb=x4COUuX91u9CgJs-qi2pMBrFrOvC2e0ZQ@mail.gmail.com>
Date: Fri, 28 Nov 2025 21:33:51 +0100
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Linux PM <linux-pm@...r.kernel.org>,
ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Mario Limonciello <mario.limonciello@....com>, Viresh Kumar <viresh.kumar@...aro.org>,
Shuah Khan <skhan@...uxfoundation.org>,
"Chanwoo Choi (samsung.com)" <chanwoo@...nel.org>
Subject: [GIT PULL] Power management updates for v6.19-rc1
Hi Linus,
I am sending this in advance because I am not expecting to make any changes
to it before next week.
Please pull from the tag
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git \
pm-6.19-rc1
with top-most commit 7cede21e9f04f16a456d3c3c8a9a8899c8d84757
Merge branches 'pm-qos' and 'pm-tools'
on top of commit ac3fd01e4c1efce8f2c054cdeb2ddd2fc0fb150d
Linux 6.18-rc7
to receive power management updates for 6.19-rc1.
There are quite a few interesting things here, including new hardware
support, new features, some bug fixes and documentation updates. In
addition, there are a usual bunch of minor fixes and cleanups all over.
In the new hardware support category, there are intel_pstate and
intel_rapl driver updates to support new processors, Panther Lake,
Wildcat Lake, Noval Lake, and Diamond Rapids in the OOB mode, OPP
and bandwidth allocation support in the tegra186 cpufreq driver,
and JH7110S SOC support in dt-platdev cpufreq.
The new features are the PM QoS CPU latency limit for suspend-to-idle,
the netlink support for the energy model management, support for
terminating system suspend via a wakeup event during the sync of
file systems, configurable number of hibernation compression threads,
the runtime PM auto-cleanup macros, and the "poweroff" PM event that
is expected to be used during system shutdown.
Bugs are mostly fixed in cpuidle governors, but there are also fixes
elsewhere, like in the amd-pstate cpufreq driver.
Documentation updates include, but are not limited to, a new doc on
debugging shutdown hangs, cross-referencing fixes and cleanups in the
intel_pstate documentation, and updates of comments in the core
hibernation code.
Specifics:
- Introduce and document a QoS limit on CPU exit latency during wakeup
from suspend-to-idle (Ulf Hansson)
- Add support for building libcpupower statically (Zuo An)
- Add support for sending netlink notifications to user space on energy
model updates (Changwoo Mini, Peng Fan)
- Minor improvements to the Rust OPP interface (Tamir Duberstein)
- Fixes to scope-based pointers in the OPP library (Viresh Kumar)
- Use residency threshold in polling state override decisions in the
menu cpuidle governor (Aboorva Devarajan)
- Add sanity check for exit latency and target residency in the cpufreq
core (Rafael Wysocki)
- Use this_cpu_ptr() where possible in the teo governor (Christian
Loehle)
- Rework the handling of tick wakeups in the teo cpuidle governor to
increase the likelihood of stopping the scheduler tick in the cases
when tick wakeups can be counted as non-timer ones (Rafael Wysocki)
- Fix a reverse condition in the teo cpuidle governor and drop a
misguided target residency check from it (Rafael Wysocki)
- Clean up multiple minor defects in the teo cpuidle governor (Rafael
Wysocki)
- Update header inclusion to make it follow the Include What You Use
principle (Andy Shevchenko)
- Enable MSR-based RAPL PMU support in the intel_rapl power capping
driver and arrange for using it on the Panther Lake and Wildcat Lake
processors (Kuppuswamy Sathyanarayanan)
- Add support for Nova Lake and Wildcat Lake processors to the
intel_rapl power capping driver (Kaushlendra Kumar, Srinivas
Pandruvada)
- Add OPP and bandwidth support for Tegra186 (Aaron Kling)
- Optimizations for parameter array handling in the amd-pstate cpufreq
driver (Mario Limonciello)
- Fix for mode changes with offline CPUs in the amd-pstate cpufreq
driver (Gautham Shenoy)
- Preserve freq_table_sorted across suspend/hibernate in the cpufreq
core (Zihuan Zhang)
- Adjust energy model rules for Intel hybrid platforms in the
intel_pstate cpufreq driver and improve printing of debug messages
in it (Rafael Wysocki)
- Replace deprecated strcpy() in cpufreq_unregister_governor()
(Thorsten Blum)
- Fix duplicate hyperlink target errors in the intel_pstate cpufreq
driver documentation and use :ref: directive for internal linking in
it (Swaraj Gaikwad, Bagas Sanjaya)
- Add Diamond Rapids OOB mode support to the intel_pstate cpufreq
driver (Kuppuswamy Sathyanarayanan)
- Use mutex guard for driver locking in the intel_pstate driver and
eliminate some code duplication from it (Rafael Wysocki)
- Replace udelay() with usleep_range() in ACPI cpufreq (Kaushlendra
Kumar)
- Minor improvements to various cpufreq drivers (Christian Marangi, Hal
Feng, Jie Zhan, Marco Crivellari, Miaoqian Lin, and Shuhao Fu)
- Replace snprintf() with scnprintf() in show_trace_dev_match()
(Kaushlendra Kumar)
- Fix memory allocation error handling in pm_vt_switch_required()
(Malaya Kumar Rout)
- Introduce CALL_PM_OP() macro and use it to simplify code in
generic PM operations (Kaushlendra Kumar)
- Add module param to backtrace all CPUs in the device power management
watchdog (Sergey Senozhatsky)
- Rework message printing in swsusp_save() (Rafael Wysocki)
- Make it possible to change the number of hibernation compression
threads (Xueqin Luo)
- Clarify that only cgroup1 freezer uses PM freezer (Tejun Heo)
- Add document on debugging shutdown hangs to PM documentation and
correct a mistaken configuration option in it (Mario Limonciello)
- Shut down wakeup source timer before removing the wakeup source from
the list (Kaushlendra Kumar, Rafael Wysocki)
- Introduce new PMSG_POWEROFF event for system shutdown handling with
the help of PM device callbacks (Mario Limonciello)
- Make pm_test delay interruptible by wakeup events (Riwen Lu)
- Clean up kernel-doc comment style usage in the core hibernation
code and remove unuseful comments from it (Sunday Adelodun, Rafael
Wysocki)
- Add support for handling wakeup events and aborting the suspend
process while it is syncing file systems (Samuel Wu, Rafael Wysocki)
- Add WQ_UNBOUND to pm_wq workqueue (Marco Crivellari)
- Add runtime PM wrapper macros for ACQUIRE()/ACQUIRE_ERR() and use
them in the PCI core and the ACPI TAD driver (Rafael Wysocki)
- Improve runtime PM in the ACPI TAD driver (Rafael Wysocki)
- Update pm_runtime_allow/forbid() documentation (Rafael Wysocki)
- Fix typos in runtime.c comments (Malaya Kumar Rout)
- Move governor.h from devfreq under include/linux/ and rename to
devfreq-governor.h to allow devfreq governor definitions in out
of drivers/devfreq/ (Dmitry Baryshkov)
- Use min() to improve readability in tegra30-devfreq.c (Thorsten
Blum)
- Fix potential use-after-free issue of OPP handling in
hisi_uncore_freq.c (Pengjie Zhang)
- Fix typo in DFSO_DOWNDIFFERENTIAL macro name in
governor_simpleondemand.c in devfreq (Riwen Lu)
Thanks!
---------------
Aaron Kling (1):
cpufreq: tegra186: add OPP support and set bandwidth
Aboorva Devarajan (1):
cpuidle: menu: Use residency threshold in polling state override decisions
Andy Shevchenko (1):
cpuidle: Update header inclusion
Bagas Sanjaya (1):
Documentation: intel-pstate: Use :ref: directive for internal linking
Changwoo Min (10):
PM: EM: Assign a unique ID when creating a performance domain
PM: EM: Expose the ID of a performance domain via debugfs
PM: EM: Add em.yaml and autogen files
PM: EM: Add a skeleton code for netlink notification
PM: EM: Add an iterator and accessor for the performance domain
PM: EM: Implement em_nl_get_pds_doit()
PM: EM: Implement em_nl_get_pd_table_doit()
PM: EM: Implement em_notify_pd_deleted()
PM: EM: Implement em_notify_pd_created/updated()
PM: EM: Notify an event when the performance domain changes
Christian Loehle (1):
cpuidle: teo: Use this_cpu_ptr() where possible
Christian Marangi (2):
cpufreq: qcom-nvmem: add compatible fallback for ipq806x for no SMEM
cpufreq: qcom-nvmem: fix compilation warning for
qcom_cpufreq_ipq806x_match_list
Dmitry Baryshkov (1):
PM / devfreq: Move governor.h to a public header location
Gautham R. Shenoy (1):
cpufreq/amd-pstate: Call cppc_set_auto_sel() only for online CPUs
Hal Feng (1):
cpufreq: dt-platdev: Add JH7110S SOC to the allowlist
Jie Zhan (1):
cpufreq: CPPC: Don't warn if FIE init fails to read counters
Kaushlendra Kumar (5):
PM: sleep: Replace snprintf() with scnprintf() in show_trace_dev_match()
PM: sleep: Introduce CALL_PM_OP() macro to simplify code
PM: wakeup: Delete timer before removing wakeup source from list
powercap: intel_rapl: Add support for Nova Lake processors
cpufreq: ACPI: Replace udelay() with usleep_range()
Kuppuswamy Sathyanarayanan (3):
cpufreq: intel_pstate: Add Diamond Rapids OOB mode support
powercap: intel_rapl: Prepare read_raw() interface for
atomic-context callers
powercap: intel_rapl: Enable MSR-based RAPL PMU support
Malaya Kumar Rout (2):
PM: console: Fix memory allocation error handling in
pm_vt_switch_required()
PM: runtime: fix typos in runtime.c comments
Marco Crivellari (2):
PM: WQ_UNBOUND added to pm_wq workqueue
cpufreq: tegra194: add WQ_PERCPU to alloc_workqueue users
Mario Limonciello (AMD) (11):
Documentation: power: Add document on debugging shutdown hangs
Documentation: power: Correct a mistaken configuration option
cpufreq/amd-pstate: Use sysfs_match_string() for epp
cpufreq/amd-pstate: Drop NULL value from amd_pstate_mode_string
cpufreq/amd-pstate: Make amd_pstate_get_mode_string() never return NULL
cpufreq/amd-pstate: Adjust return values in amd_pstate_update_status()
cpufreq/amd-pstate: Fix some whitespace issues
cpufreq/amd-pstate: Add static asserts for EPP indices
PM: Introduce new PMSG_POWEROFF event
scsi: Add PM_EVENT_POWEROFF into suspend callbacks
usb: sl811-hcd: Add PM_EVENT_POWEROFF into suspend callbacks
Miaoqian Lin (1):
cpufreq: nforce2: fix reference count leak in nforce2
Peng Fan (1):
PM: EM: Add to em_pd_list only when no failure
Pengjie Zhang (1):
PM / devfreq: hisi: Fix potential UAF in OPP handling
Rafael J. Wysocki (25):
PM: hibernate: Rework message printing in swsusp_save()
cpufreq: intel_pstate: Add and use hybrid_get_cpu_type()
cpufreq: intel_pstate: Add and use hybrid_has_l3()
cpufreq: intel_pstate: hybrid: Adjust energy model rules
cpufreq: intel_pstate: Improve printing of debug messages
PM: runtime: docs: Update pm_runtime_allow/forbid() documentation
ACPI: TAD: Rearrange runtime PM operations in acpi_tad_remove()
ACPI: TAD: Improve runtime PM using guard macros
cpufreq: intel_pstate: Use mutex guard for driver locking
PM: wakeup: Update after recent wakeup source removal ordering change
cpuidle: Add sanity check for exit latency and target residency
cpuidle: governors: teo: Drop misguided target residency check
cpuidle: governors: teo: Drop redundant function parameter
cpuidle: governors: teo: Use s64 consistently in teo_update()
cpuidle: governors: teo: Decay metrics below DECAY_SHIFT threshold
PM: runtime: Wrapper macros for ACQUIRE()/ACQUIRE_ERR()
ACPI: TAD: Use PM_RUNTIME_ACQUIRE()/PM_RUNTIME_ACQUIRE_ERR()
PCI/sysfs: Use PM_RUNTIME_ACQUIRE()/PM_RUNTIME_ACQUIRE_ERR()
cpufreq: intel_pstate: Eliminate some code duplication
cpuidle: governors: teo: Rework the handling of tick wakeups
cpuidle: governors: teo: Fix tick_intercepts handling in teo_update()
cpuidle: governors: teo: Simplify intercepts-based state lookup
PM: hibernate: Extra cleanup of comments in swap handling code
cpuidle: governors: teo: Add missing space to the description
cpuidle: Warn instead of bailing out if target residency check fails
Riwen Lu (2):
PM: suspend: Make pm_test delay interruptible by wakeup events
PM / devfreq: Fix typo in DFSO_DOWNDIFFERENTIAL macro name
Samuel Wu (2):
PM: sleep: Add support for wakeup during filesystem sync
PM: sleep: Call pm_sleep_fs_sync() instead of ksys_sync_helper()
Sergey Senozhatsky (1):
PM: dpm_watchdog: add module param to backtrace all CPUs
Shuhao Fu (1):
cpufreq: s5pv210: fix refcount leak
Srinivas Pandruvada (1):
powercap: intel_rapl: Add support for Wildcat Lake platform
Sunday Adelodun (1):
PM: hibernate: Clean up kernel-doc comment style usage
Swaraj Gaikwad (1):
Documentation: intel_pstate: fix duplicate hyperlink target errors
Tamir Duberstein (2):
rust: opp: fix broken rustdoc link
rust: opp: simplify callers of `to_c_str_array`
Tejun Heo (1):
freezer: Clarify that only cgroup1 freezer uses PM freezer
Thorsten Blum (2):
cpufreq: Replace deprecated strcpy() in cpufreq_unregister_governor()
PM / devfreq: tegra30: use min to simplify actmon_cpu_to_emc_rate
Ulf Hansson (6):
PM: QoS: Introduce a CPU system wakeup QoS limit
pmdomain: Respect the CPU system wakeup QoS limit for s2idle
pmdomain: Respect the CPU system wakeup QoS limit for cpuidle
sched: idle: Respect the CPU system wakeup QoS limit for s2idle
cpuidle: Respect the CPU system wakeup QoS limit for cpuidle
Documentation: power/cpuidle: Document the CPU system wakeup latency QoS
Viresh Kumar (1):
OPP: Initialize scope-based pointers inline
Xueqin Luo (3):
PM: hibernate: dynamically allocate crc->unc_len/unc for
configurable threads
PM: hibernate: make compression threads configurable
PM: hibernate: add sysfs interface for hibernate_compression_threads
Zihuan Zhang (1):
cpufreq: preserve freq_table_sorted across suspend/hibernate
Zuo An (1):
tools/power/cpupower: Support building libcpupower statically
---------------
Documentation/ABI/testing/sysfs-power | 16 ++
Documentation/admin-guide/kernel-parameters.txt | 10 +
Documentation/admin-guide/pm/cpuidle.rst | 9 +
Documentation/admin-guide/pm/intel_pstate.rst | 133 +++++----
Documentation/netlink/specs/em.yaml | 113 ++++++++
Documentation/power/index.rst | 1 +
Documentation/power/pm_qos_interface.rst | 9 +-
Documentation/power/runtime_pm.rst | 10 -
Documentation/power/shutdown-debugging.rst | 53 ++++
MAINTAINERS | 3 +
drivers/acpi/acpi_tad.c | 73 ++---
drivers/base/power/generic_ops.c | 85 ++----
drivers/base/power/main.c | 15 +
drivers/base/power/runtime.c | 23 +-
drivers/base/power/trace.c | 4 +-
drivers/base/power/wakeup.c | 24 +-
drivers/cpufreq/acpi-cpufreq.c | 2 +-
drivers/cpufreq/amd-pstate.c | 35 +--
drivers/cpufreq/cppc_cpufreq.c | 17 +-
drivers/cpufreq/cpufreq-dt-platdev.c | 1 +
drivers/cpufreq/cpufreq-nforce2.c | 3 +
drivers/cpufreq/cpufreq.c | 11 +-
drivers/cpufreq/intel_pstate.c | 227 +++++++--------
drivers/cpufreq/qcom-cpufreq-nvmem.c | 35 ++-
drivers/cpufreq/s5pv210-cpufreq.c | 6 +-
drivers/cpufreq/tegra186-cpufreq.c | 150 +++++++++-
drivers/cpufreq/tegra194-cpufreq.c | 3 +-
drivers/cpuidle/cpuidle.c | 12 +-
drivers/cpuidle/driver.c | 10 +
drivers/cpuidle/governor.c | 4 +
drivers/cpuidle/governors/menu.c | 9 +-
drivers/cpuidle/governors/teo.c | 159 +++++------
drivers/cpuidle/poll_state.c | 4 +
drivers/devfreq/devfreq.c | 2 +-
drivers/devfreq/governor_passive.c | 27 +-
drivers/devfreq/governor_performance.c | 2 +-
drivers/devfreq/governor_powersave.c | 2 +-
drivers/devfreq/governor_simpleondemand.c | 6 +-
drivers/devfreq/governor_userspace.c | 2 +-
drivers/devfreq/hisi_uncore_freq.c | 6 +-
drivers/devfreq/tegra30-devfreq.c | 15 +-
drivers/opp/core.c | 69 ++---
drivers/opp/cpu.c | 16 +-
drivers/opp/of.c | 125 +++++----
drivers/pci/pci-sysfs.c | 4 +-
drivers/pmdomain/core.c | 10 +-
drivers/pmdomain/governor.c | 33 ++-
drivers/powercap/intel_rapl_common.c | 39 +--
drivers/powercap/intel_rapl_msr.c | 43 ++-
drivers/powercap/intel_rapl_tpmi.c | 2 +-
drivers/scsi/mesh.c | 1 +
drivers/scsi/stex.c | 1 +
.../intel/int340x_thermal/processor_thermal_rapl.c | 2 +-
drivers/usb/host/sl811-hcd.c | 1 +
include/linux/cpuidle.h | 6 +-
.../governor.h => include/linux/devfreq-governor.h | 33 +--
include/linux/energy_model.h | 4 +
include/linux/freezer.h | 12 +-
include/linux/intel_rapl.h | 2 +-
include/linux/pm.h | 8 +-
include/linux/pm_domain.h | 1 +
include/linux/pm_qos.h | 9 +
include/linux/pm_runtime.h | 24 ++
include/trace/events/power.h | 3 +-
include/uapi/linux/energy_model.h | 62 +++++
kernel/cgroup/legacy_freezer.c | 2 +-
kernel/freezer.c | 2 +-
kernel/power/Kconfig | 11 +
kernel/power/Makefile | 4 +-
kernel/power/console.c | 8 +-
kernel/power/em_netlink.c | 308 +++++++++++++++++++++
kernel/power/em_netlink.h | 39 +++
kernel/power/em_netlink_autogen.c | 48 ++++
kernel/power/em_netlink_autogen.h | 23 ++
kernel/power/energy_model.c | 90 +++++-
kernel/power/hibernate.c | 6 +-
kernel/power/main.c | 81 +++++-
kernel/power/power.h | 1 +
kernel/power/qos.c | 106 +++++++
kernel/power/snapshot.c | 13 +-
kernel/power/suspend.c | 12 +-
kernel/power/swap.c | 256 +++++++++--------
kernel/power/user.c | 4 +-
kernel/sched/idle.c | 12 +-
rust/kernel/opp.rs | 114 ++++----
tools/power/cpupower/Makefile | 32 ++-
86 files changed, 2166 insertions(+), 847 deletions(-)
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