From mboxrd@z Thu Jan 1 00:00:00 1970 From: Srinivas Pandruvada Subject: [PATCH 3/4] cpufreq: intel_pstate: New sysfs entry to control HWP boost Date: Tue, 5 Jun 2018 14:42:41 -0700 Message-ID: <20180605214242.62156-4-srinivas.pandruvada@linux.intel.com> References: <20180605214242.62156-1-srinivas.pandruvada@linux.intel.com> Return-path: In-Reply-To: <20180605214242.62156-1-srinivas.pandruvada@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org To: lenb@kernel.org, rjw@rjwysocki.net, mgorman@techsingularity.net Cc: peterz@infradead.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, juri.lelli@redhat.com, viresh.kumar@linaro.org, ggherdovich@suse.cz, Srinivas Pandruvada List-Id: linux-pm@vger.kernel.org A new attribute is added to intel_pstate sysfs to enable/disable HWP dynamic performance boost. Reported-by: Mel Gorman Tested-by: Giovanni Gherdovich Signed-off-by: Srinivas Pandruvada --- drivers/cpufreq/intel_pstate.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 5b2b6b6d1ff4..70bf63bb4e0e 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -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 ************************/ -- 2.13.6