linux-kernel - [PATCH 3/3] cpufreq: add sysfs knob for toggling core performance boost

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Message-ID: <201003031459.27757.mark.langsdorf@amd.com>
Date:	Wed, 3 Mar 2010 14:59:27 -0600
From:	Mark Langsdorf <mark.langsdorf@....com>
To:	<linux-kernel@...r.kernel.org>, <cpufreq@...r.kernel.org>,
	<bhavna.sarathy@....com>, <joachim.deguara@....com>,
	<borislav.petkov@....com>
Subject: [PATCH 3/3] cpufreq: add sysfs knob for toggling core performance boost

>From 1ba7af20a37b72a4375d3e3ddd33a033f204ee21 Mon Sep 17 00:00:00 2001
From: Mark Langsdorf <mark.langsdorf@....com>
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@....com>
Tested-by: Mark Langsdorf <mark.langsdorf@....com>
---
 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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