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authorRoss Lagerwall <rosslagerwall@gmail.com>2013-05-31 20:45:17 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-06-05 13:10:57 +0200
commit8673b83bf2f013379453b4779047bf3c6ae387e4 (patch)
tree689efa8061ae132a50c746789122e6822d114979
parentd683b96b072dc4680fc74964eca77e6a23d1fa6e (diff)
downloadlinux-8673b83bf2f013379453b4779047bf3c6ae387e4.tar.bz2
acpi-cpufreq: set current frequency based on target P-State
Commit 4b31e774 (Always set P-state on initialization) fixed bug #4634 and caused the driver to always set the target P-State at least once since the initial P-State may not be the desired one. Commit 5a1c0228 (cpufreq: Avoid calling cpufreq driver's target() routine if target_freq == policy->cur) caused a regression in this behavior. This fixes the regression by setting policy->cur based on the CPU's target frequency rather than the CPU's current reported frequency (which may be different). This means that the P-State will be set initially if the CPU's target frequency is different from the governor's target frequency. This fixes an issue where setting the default governor to performance wouldn't correctly enable turbo mode on all cores. Signed-off-by: Ross Lagerwall <rosslagerwall@gmail.com> Reviewed-by: Len Brown <len.brown@intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: 3.8+ <stable@vger.kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
-rw-r--r--drivers/cpufreq/acpi-cpufreq.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index 11b8b4b54ceb..edc089e9d0c4 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -347,11 +347,11 @@ static u32 get_cur_val(const struct cpumask *mask)
switch (per_cpu(acfreq_data, cpumask_first(mask))->cpu_feature) {
case SYSTEM_INTEL_MSR_CAPABLE:
cmd.type = SYSTEM_INTEL_MSR_CAPABLE;
- cmd.addr.msr.reg = MSR_IA32_PERF_STATUS;
+ cmd.addr.msr.reg = MSR_IA32_PERF_CTL;
break;
case SYSTEM_AMD_MSR_CAPABLE:
cmd.type = SYSTEM_AMD_MSR_CAPABLE;
- cmd.addr.msr.reg = MSR_AMD_PERF_STATUS;
+ cmd.addr.msr.reg = MSR_AMD_PERF_CTL;
break;
case SYSTEM_IO_CAPABLE:
cmd.type = SYSTEM_IO_CAPABLE;