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| author | Mario Limonciello <mario.limonciello@amd.com> | 2023-06-20 20:24:33 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2023-06-21 19:44:56 +0300 |
| commit | c88ad30e3f861c7be4e3b4995554e2b0754059b7 (patch) | |
| tree | 0ae7ddcef8bdbcc0be8583ce6506ce7e1fec1752 /drivers/cpufreq/Kconfig.x86 | |
| parent | 32f80b9adfdb43f8af248596724f59dde938a190 (diff) | |
| download | linux-c88ad30e3f861c7be4e3b4995554e2b0754059b7.tar.xz | |
cpufreq: amd-pstate: Add a kernel config option to set default mode
Users are having more success with amd-pstate since the introduction
of EPP and Guided modes. To expose the driver to more users by default
introduce a kernel configuration option for setting the default mode.
Users can use an integer to map out which default mode they want to use
in lieu of a kernel command line option.
This will default to EPP, but only if:
1) The CPU supports an MSR.
2) The system profile is identified
3) The system profile is identified as a non-server by the FADT.
Link: https://gitlab.freedesktop.org/hadess/power-profiles-daemon/-/merge_requests/121
Acked-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Co-developed-by: Perry Yuan <perry.yuan@amd.com>
Signed-off-by: Perry Yuan <perry.yuan@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/Kconfig.x86')
| -rw-r--r-- | drivers/cpufreq/Kconfig.x86 | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/cpufreq/Kconfig.x86 b/drivers/cpufreq/Kconfig.x86 index 00476e94db90..438c9e75a04d 100644 --- a/drivers/cpufreq/Kconfig.x86 +++ b/drivers/cpufreq/Kconfig.x86 @@ -51,6 +51,23 @@ config X86_AMD_PSTATE If in doubt, say N. +config X86_AMD_PSTATE_DEFAULT_MODE + int "AMD Processor P-State default mode" + depends on X86_AMD_PSTATE + default 3 if X86_AMD_PSTATE + range 1 4 + help + Select the default mode the amd-pstate driver will use on + supported hardware. + The value set has the following meanings: + 1 -> Disabled + 2 -> Passive + 3 -> Active (EPP) + 4 -> Guided + + For details, take a look at: + <file:Documentation/admin-guide/pm/amd-pstate.rst>. + config X86_AMD_PSTATE_UT tristate "selftest for AMD Processor P-State driver" depends on X86 && ACPI_PROCESSOR |