Commit d82f2692 authored by Len Brown's avatar Len Brown Committed by Rafael J. Wysocki
Browse files

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: default avatarLen Brown <len.brown@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 64078299
......@@ -662,6 +662,9 @@
cpuidle.off=1 [CPU_IDLE]
disable the cpuidle sub-system
cpufreq.off=1 [CPU_FREQ]
disable the cpufreq sub-system
cpu_init_udelay=N
[X86] Delay for N microsec between assert and de-assert
of APIC INIT to start processors. This delay occurs
......
......@@ -2532,4 +2532,5 @@ static int __init cpufreq_core_init(void)
return 0;
}
module_param(off, int, 0444);
core_initcall(cpufreq_core_init);
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment