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Commit aaaece3d authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Rafael J. Wysocki
Browse files

cpufreq: intel_pstate: New sysfs entry to control HWP boost 



A new attribute is added to intel_pstate sysfs to enable/disable
HWP dynamic performance boost.

Reported-by: default avatarMel Gorman <mgorman@techsingularity.net>
Tested-by: default avatarGiovanni Gherdovich <ggherdovich@suse.cz>
Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 52ccc431

drivers/cpufreq/intel_pstate.c

+30 −0
Original line number Diff line number Diff line
@@ -1033,6 +1033,30 @@ static ssize_t store_min_perf_pct(struct kobject *a, struct attribute *b, 
	return count;

}



static ssize_t show_hwp_dynamic_boost(struct kobject *kobj,

				struct attribute *attr, char *buf)

{

	return sprintf(buf, "%u\n", hwp_boost);

}



static ssize_t store_hwp_dynamic_boost(struct kobject *a, struct attribute *b,

				       const char *buf, size_t count)

{

	unsigned int input;

	int ret;



	ret = kstrtouint(buf, 10, &input);

	if (ret)

		return ret;



	mutex_lock(&intel_pstate_driver_lock);

	hwp_boost = !!input;

	intel_pstate_update_policies();

	mutex_unlock(&intel_pstate_driver_lock);



	return count;

}



show_one(max_perf_pct, max_perf_pct);

show_one(min_perf_pct, min_perf_pct);
@@ -1042,6 +1066,7 @@ define_one_global_rw(max_perf_pct); 
define_one_global_rw(min_perf_pct);

define_one_global_ro(turbo_pct);

define_one_global_ro(num_pstates);

define_one_global_rw(hwp_dynamic_boost);



static struct attribute *intel_pstate_attributes[] = {

	&status.attr,
@@ -1082,6 +1107,11 @@ static void __init intel_pstate_sysfs_expose_params(void) 
	rc = sysfs_create_file(intel_pstate_kobject, &min_perf_pct.attr);

	WARN_ON(rc);



	if (hwp_active) {

		rc = sysfs_create_file(intel_pstate_kobject,

				       &hwp_dynamic_boost.attr);

		WARN_ON(rc);

	}

}

/************************** sysfs end ************************/