kernel/linux.git/Documentation/admin-guide/pm, branch v5.10.257

x86: Handle idle=nomwait cmdline properly for x86_idle

2022-08-21T13:15:28+00:00

[ Upstream commit 8bcedb4ce04750e1ccc9a6b6433387f6a9166a56 ] When kernel is booted with idle=nomwait do not use MWAIT as the default idle state. If the user boots the kernel with idle=nomwait, it is a clear direction to not use mwait as the default idle state. However, the current code does not take this into consideration while selecting the default idle state on x86. Fix it by checking for the idle=nomwait boot option in prefer_mwait_c1_over_halt(). Also update the documentation around idle=nomwait appropriately. [ dhansen: tweak commit message ] Signed-off-by: Wyes Karny Signed-off-by: Dave Hansen Tested-by: Zhang Rui Link: https://lkml.kernel.org/r/fdc2dc2d0a1bc21c2f53d989ea2d2ee3ccbc0dbe.1654538381.git-series.wyes.karny@amd.com Signed-off-by: Sasha Levin

Documentation: PM: cpuidle: correct path name

2020-11-02T17:02:20+00:00

cpu/ is needed before cpu/ Signed-off-by: Julia Lawall Signed-off-by: Rafael J. Wysocki

Documentation: PM: cpuidle: correct typo

2020-11-02T17:00:08+00:00

cerainly -> certainly Signed-off-by: Julia Lawall Signed-off-by: Rafael J. Wysocki

docs: remove some replace macros like |struct foo|

2020-10-15T05:49:40+00:00

There are three files with replace macros for structs, mapping them into Sphinx 2.x C domain references. Well, this is broken on Sphinx 3.x. Also, for Sphinx 2.x, the automarkup macro should be able to take care of them. So, let's just drop those. Signed-off-by: Mauro Carvalho Chehab

Merge back cpuidle material for 5.10.

2020-10-05T11:11:17+00:00

* pm-cpuidle: cpuidle: record state entry rejection statistics cpuidle: psci: Allow PM domain to be initialized even if no OSI mode firmware: psci: Extend psci_set_osi_mode() to allow reset to PC mode ACPI: processor: Print more information when acpi_processor_evaluate_cst() fails cpuidle: tegra: Correctly handle result of arm_cpuidle_simple_enter()

Documentation: PM: Fix a reStructuredText syntax error

2020-09-30T15:40:37+00:00

Fix a reStructuredText syntax error in the cpuidle PM admin-guide documentation: the ``...'' quotation marks are parsed as partial ''...'' reStructuredText markup and break the output formatting. This change them to "...". Signed-off-by: Yoann Congal Signed-off-by: Rafael J. Wysocki

cpuidle: record state entry rejection statistics

2020-09-23T12:10:31+00:00

CPUs may fail to enter the chosen idle state if there was a pending interrupt, causing the cpuidle driver to return an error value. Record that and export it via sysfs along with the other idle state statistics. This could prove useful in understanding behavior of the governor and the system during usecases that involve multiple CPUs. Signed-off-by: Lina Iyer [ rjw: Changelog and documentation edits ] Signed-off-by: Rafael J. Wysocki

cpufreq: intel_pstate: Tweak the EPP sysfs interface

2020-09-01T19:14:06+00:00

Modify the EPP sysfs interface to reject attempts to change the EPP to values different from 0 ("performance") in the active mode with the "performance" policy (ie. scaling_governor set to "performance"), to avoid situations in which the kernel appears to discard data passed to it via the EPP sysfs attribute. Signed-off-by: Rafael J. Wysocki Reviewed-by: Artem Bityutskiy Acked-by: Srinivas Pandruvada

Documentation: fix pm/intel_pstate build warning and wording

2020-08-24T10:48:37+00:00

Fix documentation build warning and sentence wording: Documentation/admin-guide/pm/intel_pstate.rst:568: WARNING: Unexpected indentation. Fixes: f473bf398bf1 ("cpufreq: intel_pstate: Allow raw energy performance preference value") Signed-off-by: Randy Dunlap Cc: Srinivas Pandruvada Cc: Rafael J. Wysocki Signed-off-by: Rafael J. Wysocki

Merge branch 'pm-cpufreq'

2020-08-14T17:39:35+00:00

* pm-cpufreq: cpufreq: intel_pstate: Implement passive mode with HWP enabled