Commit 02824a5f authored Sep 16, 2024 by Linus Torvalds

linux-pm

Pull power management updates from Rafael Wysocki:
 "By the number of new lines of code, the most visible change here is
  the addition of hybrid CPU capacity scaling support to the
  intel_pstate driver. Next are the amd-pstate driver changes related to
  the calculation of the AMD boost numerator and preferred core
  detection.

  As far as new hardware support is concerned, the intel_idle driver
  will now handle Granite Rapids Xeon processors natively, the
  intel_rapl power capping driver will recognize family 1Ah of AMD
  processors and Intel ArrowLake-U chipos, and intel_pstate will handle
  Granite Rapids and Sierra Forest chips in the out-of-band (OOB) mode.

  Apart from the above, there is a usual collection of assorted fixes
  and code cleanups in many places and there are tooling updates.

  Specifics:

   - Remove LATENCY_MULTIPLIER from cpufreq (Qais Yousef)

   - Add support for Granite Rapids and Sierra Forest in OOB mode to the
     intel_pstate cpufreq driver (Srinivas Pandruvada)

   - Add basic support for CPU capacity scaling on x86 and make the
     intel_pstate driver set asymmetric CPU capacity on hybrid systems
     without SMT (Rafael Wysocki)

   - Add missing MODULE_DESCRIPTION() macros to the powerpc cpufreq
     driver (Jeff Johnson)

   - Several OF related cleanups in cpufreq drivers (Rob Herring)

   - Enable COMPILE_TEST for ARM drivers (Rob Herrring)

   - Introduce quirks for syscon failures and use socinfo to get
     revision for TI cpufreq driver (Dhruva Gole, Nishanth Menon)

   - Minor cleanups in amd-pstate driver (Anastasia Belova, Dhananjay
     Ugwekar)

   - Minor cleanups for loongson, cpufreq-dt and powernv cpufreq drivers
     (Danila Tikhonov, Huacai Chen, and Liu Jing)

   - Make amd-pstate validate return of any attempt to update EPP
     limits, which fixes the masking hardware problems (Mario
     Limonciello)

   - Move the calculation of the AMD boost numerator outside of
     amd-pstate, correcting acpi-cpufreq on systems with preferred cores
     (Mario Limonciello)

   - Harden preferred core detection in amd-pstate to avoid potential
     false positives (Mario Limonciello)

   - Add extra unit test coverage for mode state machine (Mario
     Limonciello)

   - Fix an "Uninitialized variables" issue in amd-pstste (Qianqiang
     Liu)

   - Add Granite Rapids Xeon support to intel_idle (Artem Bityutskiy)

   - Disable promotion to C1E on Jasper Lake and Elkhart Lake in
     intel_idle (Kai-Heng Feng)

   - Use scoped device node handling to fix missing of_node_put() and
     simplify walking OF children in the riscv-sbi cpuidle driver
     (Krzysztof Kozlowski)

   - Remove dead code from cpuidle_enter_state() (Dhruva Gole)

   - Change an error pointer to NULL to fix error handling in the
     intel_rapl power capping driver (Dan Carpenter)

   - Fix off by one in get_rpi() in the intel_rapl power capping driver
     (Dan Carpenter)

   - Add support for ArrowLake-U to the intel_rapl power capping driver
     (Sumeet Pawnikar)

   - Fix the energy-pkg event for AMD CPUs in the intel_rapl power
     capping driver (Dhananjay Ugwekar)

   - Add support for AMD family 1Ah processors to the intel_rapl power
     capping driver (Dhananjay Ugwekar)

   - Remove unused stub for saveable_highmem_page() and remove
     deprecated macros from power management documentation (Andy
     Shevchenko)

   - Use ysfs_emit() and sysfs_emit_at() in "show" functions in the PM
     sysfs interface (Xueqin Luo)

   - Update the maintainers information for the
     operating-points-v2-ti-cpu DT binding (Dhruva Gole)

   - Drop unnecessary of_match_ptr() from ti-opp-supply (Rob Herring)

   - Add missing MODULE_DESCRIPTION() macros to devfreq governors (Jeff
     Johnson)

   - Use devm_clk_get_enabled() in the exynos-bus devfreq driver (Anand
     Moon)

   - Use of_property_present() instead of of_get_property() in the
     imx-bus devfreq driver (Rob Herring)

   - Update directory handling and installation process in the pm-graph
     Makefile and add .gitignore to ignore sleepgraph.py artifacts to
     pm-graph (Amit Vadhavana, Yo-Jung Lin)

   - Make cpupower display residency value in idle-info (Aboorva
     Devarajan)

   - Add missing powercap_set_enabled() stub function to cpupower (John
     B. Wyatt IV)

   - Add SWIG support to cpupower (John B. Wyatt IV)"

* tag 'pm-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (62 commits)
  cpufreq/amd-pstate-ut: Fix an "Uninitialized variables" issue
  cpufreq/amd-pstate-ut: Add test case for mode switches
  cpufreq/amd-pstate: Export symbols for changing modes
  amd-pstate: Add missing documentation for `amd_pstate_prefcore_ranking`
  cpufreq: amd-pstate: Add documentation for `amd_pstate_hw_prefcore`
  cpufreq: amd-pstate: Optimize amd_pstate_update_limits()
  cpufreq: amd-pstate: Merge amd_pstate_highest_perf_set() into amd_get_boost_ratio_numerator()
  x86/amd: Detect preferred cores in amd_get_boost_ratio_numerator()
  x86/amd: Move amd_get_highest_perf() out of amd-pstate
  ACPI: CPPC: Adjust debug messages in amd_set_max_freq_ratio() to warn
  ACPI: CPPC: Drop check for non zero perf ratio
  x86/amd: Rename amd_get_highest_perf() to amd_get_boost_ratio_numerator()
  ACPI: CPPC: Adjust return code for inline functions in !CONFIG_ACPI_CPPC_LIB
  x86/amd: Move amd_get_highest_perf() from amd.c to cppc.c
  PM: hibernate: Remove unused stub for saveable_highmem_page()
  pm:cpupower: Add error warning when SWIG is not installed
  MAINTAINERS: Add Maintainers for SWIG Python bindings
  pm:cpupower: Include test_raw_pylibcpupower.py
  pm:cpupower: Add SWIG bindings files for libcpupower
  pm:cpupower: Add missing powercap_set_enabled() stub function
  ...

parents 11b31250 0a06811d

Documentation/admin-guide/pm/amd-pstate.rst

+14 −1

Original line number	Diff line number	Diff line
		@@ -251,7 +251,9 @@ performance supported in `AMD CPPC Performance Capability <perf_cap_>`_).
		In some ASICs, the highest CPPC performance is not the one in the ``_CPC``
		table, so we need to expose it to sysfs. If boost is not active, but
		still supported, this maximum frequency will be larger than the one in
		``cpuinfo``.
		``cpuinfo``. On systems that support preferred core, the driver will have
		different values for some cores than others and this will reflect the values
		advertised by the platform at bootup.
		This attribute is read-only.

		``amd_pstate_lowest_nonlinear_freq``
		@@ -262,6 +264,17 @@ lowest non-linear performance in `AMD CPPC Performance Capability
		<perf_cap_>`_.)
		This attribute is read-only.

		``amd_pstate_hw_prefcore``

		Whether the platform supports the preferred core feature and it has been
		enabled. This attribute is read-only.

		``amd_pstate_prefcore_ranking``

		The performance ranking of the core. This number doesn't have any unit, but
		larger numbers are preferred at the time of reading. This can change at
		runtime based on platform conditions. This attribute is read-only.

		``energy_performance_available_preferences``

		A list of all the supported EPP preferences that could be used for

Documentation/devicetree/bindings/opp/operating-points-v2-ti-cpu.yaml

+1 −1

Original line number	Diff line number	Diff line
		@@ -19,7 +19,7 @@ description:
		the hardware description for the scheme mentioned above.

		maintainers:
		- Nishanth Menon <nm@ti.com>
		- Dhruva Gole <d-gole@ti.com>

		allOf:
		- $ref: opp-v2-base.yaml#

Documentation/power/pci.rst

+5 −6

Original line number	Diff line number	Diff line
		@@ -979,18 +979,17 @@ subsections can be defined as a separate function, it often is convenient to
		point two or more members of struct dev_pm_ops to the same routine. There are
		a few convenience macros that can be used for this purpose.

		The SIMPLE_DEV_PM_OPS macro declares a struct dev_pm_ops object with one
		The DEFINE_SIMPLE_DEV_PM_OPS() declares a struct dev_pm_ops object with one
		suspend routine pointed to by the .suspend(), .freeze(), and .poweroff()
		members and one resume routine pointed to by the .resume(), .thaw(), and
		.restore() members. The other function pointers in this struct dev_pm_ops are
		unset.

		The UNIVERSAL_DEV_PM_OPS macro is similar to SIMPLE_DEV_PM_OPS, but it
		additionally sets the .runtime_resume() pointer to the same value as
		.resume() (and .thaw(), and .restore()) and the .runtime_suspend() pointer to
		the same value as .suspend() (and .freeze() and .poweroff()).
		The DEFINE_RUNTIME_DEV_PM_OPS() is similar to DEFINE_SIMPLE_DEV_PM_OPS(), but it
		additionally sets the .runtime_resume() pointer to pm_runtime_force_resume()
		and the .runtime_suspend() pointer to pm_runtime_force_suspend().

		The SET_SYSTEM_SLEEP_PM_OPS can be used inside of a declaration of struct
		The SYSTEM_SLEEP_PM_OPS() can be used inside of a declaration of struct
		dev_pm_ops to indicate that one suspend routine is to be pointed to by the
		.suspend(), .freeze(), and .poweroff() members and one resume routine is to
		be pointed to by the .resume(), .thaw(), and .restore() members.

Documentation/power/runtime_pm.rst

+2 −2

Original line number	Diff line number	Diff line
		@@ -811,8 +811,8 @@ subsystem-level dev_pm_ops structure.

		Device drivers that wish to use the same function as a system suspend, freeze,
		poweroff and runtime suspend callback, and similarly for system resume, thaw,
		restore, and runtime resume, can achieve this with the help of the
		UNIVERSAL_DEV_PM_OPS macro defined in include/linux/pm.h (possibly setting its
		restore, and runtime resume, can achieve similar behaviour with the help of the
		DEFINE_RUNTIME_DEV_PM_OPS() defined in include/linux/pm_runtime.h (possibly setting its
		last argument to NULL).

		8. "No-Callback" Devices

MAINTAINERS

+3 −0

Original line number	Diff line number	Diff line
		@@ -5851,6 +5851,9 @@ CPU POWER MONITORING SUBSYSTEM
		M: Thomas Renninger <trenn@suse.com>
		M: Shuah Khan <shuah@kernel.org>
		M: Shuah Khan <skhan@linuxfoundation.org>
		M: John B. Wyatt IV <jwyatt@redhat.com>
		M: John B. Wyatt IV <sageofredondo@gmail.com>
		M: John Kacur <jkacur@redhat.com>
		L: linux-pm@vger.kernel.org
		S: Maintained
		F: tools/power/cpupower/