linux-kernel - [PATCH 11/19] cpufreq: amd: add amd-pstate performance attributes

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Date:   Wed, 8 Sep 2021 22:59:53 +0800
From:   Huang Rui <ray.huang@....com>
To:     "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Shuah Khan <skhan@...uxfoundation.org>,
        "Borislav Petkov" <bp@...e.de>, Ingo Molnar <mingo@...nel.org>,
        <linux-pm@...r.kernel.org>
CC:     Deepak Sharma <deepak.sharma@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Mario Limonciello <mario.limonciello@....com>,
        Nathan Fontenot <nathan.fontenot@....com>,
        Jinzhou Su <Jinzhou.Su@....com>,
        Xiaojian Du <Xiaojian.Du@....com>,
        <linux-kernel@...r.kernel.org>, <x86@...nel.org>,
        Huang Rui <ray.huang@....com>
Subject: [PATCH 11/19] cpufreq: amd: add amd-pstate performance attributes

Introduce sysfs attributes to get the different level amd-pstate
performances.

Signed-off-by: Huang Rui <ray.huang@....com>
---
 drivers/cpufreq/amd-pstate.c | 66 ++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 3c727a22cb69..9c60388d45ed 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -647,6 +647,62 @@ static ssize_t show_amd_pstate_min_freq(struct cpufreq_policy *policy, char *buf
 	return ret;
 }
 
+static ssize_t
+show_amd_pstate_highest_perf(struct cpufreq_policy *policy, char *buf)
+{
+	int ret = 0;
+	u32 perf;
+	struct amd_cpudata *cpudata = policy->driver_data;
+
+	perf = READ_ONCE(cpudata->highest_perf);
+
+	ret += sprintf(&buf[ret], "%u\n", perf);
+
+	return ret;
+}
+
+static ssize_t
+show_amd_pstate_nominal_perf(struct cpufreq_policy *policy, char *buf)
+{
+	int ret = 0;
+	u32 perf;
+	struct amd_cpudata *cpudata = policy->driver_data;
+
+	perf = READ_ONCE(cpudata->nominal_perf);
+
+	ret += sprintf(&buf[ret], "%u\n", perf);
+
+	return ret;
+}
+
+static ssize_t
+show_amd_pstate_lowest_nonlinear_perf(struct cpufreq_policy *policy, char *buf)
+{
+	int ret = 0;
+	u32 perf;
+	struct amd_cpudata *cpudata = policy->driver_data;
+
+	perf = READ_ONCE(cpudata->lowest_nonlinear_perf);
+
+	ret += sprintf(&buf[ret], "%u\n", perf);
+
+	return ret;
+}
+
+static ssize_t
+show_amd_pstate_lowest_perf(struct cpufreq_policy *policy, char *buf)
+{
+	int ret = 0;
+	u32 perf;
+	struct amd_cpudata *cpudata = policy->driver_data;
+
+	perf = READ_ONCE(cpudata->lowest_perf);
+
+	ret += sprintf(&buf[ret], "%u\n", perf);
+
+	return ret;
+}
+
 static ssize_t show_is_amd_pstate_enabled(struct cpufreq_policy *policy,
 					  char *buf)
 {
@@ -654,17 +710,27 @@ static ssize_t show_is_amd_pstate_enabled(struct cpufreq_policy *policy,
 }
 
 cpufreq_freq_attr_ro(is_amd_pstate_enabled);
+
 cpufreq_freq_attr_ro(amd_pstate_max_freq);
 cpufreq_freq_attr_ro(amd_pstate_nominal_freq);
 cpufreq_freq_attr_ro(amd_pstate_lowest_nonlinear_freq);
 cpufreq_freq_attr_ro(amd_pstate_min_freq);
 
+cpufreq_freq_attr_ro(amd_pstate_highest_perf);
+cpufreq_freq_attr_ro(amd_pstate_nominal_perf);
+cpufreq_freq_attr_ro(amd_pstate_lowest_nonlinear_perf);
+cpufreq_freq_attr_ro(amd_pstate_lowest_perf);
+
 static struct freq_attr *amd_pstate_attr[] = {
 	&is_amd_pstate_enabled,
 	&amd_pstate_max_freq,
 	&amd_pstate_nominal_freq,
 	&amd_pstate_lowest_nonlinear_freq,
 	&amd_pstate_min_freq,
+	&amd_pstate_highest_perf,
+	&amd_pstate_nominal_perf,
+	&amd_pstate_lowest_nonlinear_perf,
+	&amd_pstate_lowest_perf,
 	NULL,
 };
 
-- 
2.25.1