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Wyes Karny 7c17dcfc87 x86: Handle idle=nomwait cmdline properly for x86_idle 
[ Upstream commit 8bcedb4ce0 ]

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 <wyes.karny@amd.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Link: https://lkml.kernel.org/r/fdc2dc2d0a1bc21c2f53d989ea2d2ee3ccbc0dbe.1654538381.git-series.wyes.karny@amd.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-04-19 17:52:06 +08:00
..
cpufreq.rst docs: remove some replace macros like |struct foo| 2020-10-15 07:49:40 +02:00
cpufreq_drivers.rst Documentation: cpufreq: Move legacy driver documentation 2020-03-02 11:31:06 +01:00
cpuidle.rst x86: Handle idle=nomwait cmdline properly for x86_idle 2023-04-19 17:52:06 +08:00
index.rst Documentation: PM: Add SPDX license tags to multiple files 2019-04-08 12:57:47 +02:00
intel-speed-select.rst Documentation: fix multiple typos found in the admin-guide subdirectory 2020-12-08 10:27:56 -07:00
intel_epb.rst admin-guide: pm: intel_epb: Add SPDX license tag and copyright notice 2019-04-08 12:59:09 +02:00
intel_idle.rst docs: admin-guide: pm: avoid using ReST :doc:foo markup 2021-06-17 13:24:36 -06:00
intel_pstate.rst Power management updates for 5.14-rc1 2021-06-29 13:36:06 -07:00
sleep-states.rst Documentation: admin-guide: PM: Update sleep states documentation 2020-02-03 11:58:26 +01:00
strategies.rst Documentation: PM: Unify copyright notices 2019-04-08 12:57:47 +02:00
suspend-flows.rst Documentation: PM: sleep: Document system-wide suspend code flows 2020-04-03 11:41:01 +02:00
system-wide.rst Documentation: PM: sleep: Document system-wide suspend code flows 2020-04-03 11:41:01 +02:00
working-state.rst Documentation: admin-guide: pm: Document intel-speed-select 2020-05-19 19:59:10 +02:00