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| author |   Len Brown <len.brown@intel.com> | 2017-02-28 16:44:16 -0500 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-03-06 00:05:31 +0100 |
| commit | d82f26925599cae83c38d17d07ae982356e81318 (patch) | |
| tree | 3ee139fb6287426538053878a874a0231f51821a /drivers/cpufreq | |
| parent | cpufreq: intel_pstate: Avoid triggering cpu_frequency tracepoint unnecessarily (diff) | |
| download | linux-dev-d82f26925599cae83c38d17d07ae982356e81318.tar.xz linux-dev-d82f26925599cae83c38d17d07ae982356e81318.zip | |
cpufreq: Add the "cpufreq.off=1" cmdline option
Add the "cpufreq.off=1" cmdline option.
At boot-time, this allows a user to request CONFIG_CPU_FREQ=n
behavior from a kernel built with CONFIG_CPU_FREQ=y.
This is analogous to the existing "cpuidle.off=1" option
and CONFIG_CPU_IDLE=y
This capability is valuable when we need to debug end-user
issues in the BIOS or in Linux. It is also convenient
for enabling comparisons, which may otherwise require a new kernel,
or help from BIOS SETUP, which may be buggy or unavailable.
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 80a785ad17e8..7790db2645d7 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -2532,4 +2532,5 @@ static int __init cpufreq_core_init(void) return 0; } +module_param(off, int, 0444); core_initcall(cpufreq_core_init); |