>From 1ba7af20a37b72a4375d3e3ddd33a033f204ee21 Mon Sep 17 00:00:00 2001
From: Mark Langsdorf <mark.langsdorf@xxxxxxx>
Date: Wed, 3 Mar 2010 14:34:47 -0600
Subject: [PATCH 2/2] cpufreq: add sysfs knob for toggling core performance boost
Signed-off-by: Borislav Petkov <borislav.petkov@xxxxxxx>
Tested-by: Mark Langsdorf <mark.langsdorf@xxxxxxx>
---
drivers/cpufreq/cpufreq.c | 26 ++++++++++++++++++++++++++
1 files changed, 26 insertions(+), 0 deletions(-)
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 67bc2ec..e0fe93f 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -662,6 +662,30 @@ static ssize_t show_bios_limit(struct cpufreq_policy *policy, char *buf)
return sprintf(buf, "%u\n", policy->cpuinfo.max_freq);
}
+static ssize_t store_cpb(struct cpufreq_policy *policy, const char *buf,
+ size_t count)
+{
+ int ret = -EINVAL;
+ unsigned long val = 0;
+
+ ret = strict_strtoul(buf, 10, &val);
+ if (!ret && (val == 0 || val == 1))
+ policy->flags.cpb = val;
+ else
+ return -EINVAL;
+
+ ret = __cpufreq_driver_target(policy, policy->cur, CPUFREQ_RELATION_H);
+ if (ret)
+ return -EINVAL;
+
+ return count;
+}
+
+static ssize_t show_cpb(struct cpufreq_policy *policy, char *buf)
+{
+ return sprintf(buf, "%u\n", policy->flags.cpb);
+}
+
#define define_one_ro(_name) \
static struct freq_attr _name = \
__ATTR(_name, 0444, show_##_name, NULL)
@@ -688,6 +712,7 @@ define_one_rw(scaling_min_freq);
define_one_rw(scaling_max_freq);
define_one_rw(scaling_governor);
define_one_rw(scaling_setspeed);
+define_one_rw(cpb);
static struct attribute *default_attrs[] = {
&cpuinfo_min_freq.attr,
@@ -701,6 +726,7 @@ static struct attribute *default_attrs[] = {
&scaling_driver.attr,
&scaling_available_governors.attr,
&scaling_setspeed.attr,
+ &cpb.attr,
NULL
};
--
1.6.0.2
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