linux-kernel - [PATCH 17/19] cpupower: add amd-pstate get data function to query the info

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Date:   Wed, 8 Sep 2021 22:59:59 +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 17/19] cpupower: add amd-pstate get data function to query the info

Frequency-info needs an interface to query the current amd-pstate data.

Signed-off-by: Huang Rui <ray.huang@....com>
---
 tools/power/cpupower/lib/cpufreq.c |  6 ++++++
 tools/power/cpupower/lib/cpufreq.h | 13 +++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/tools/power/cpupower/lib/cpufreq.c b/tools/power/cpupower/lib/cpufreq.c
index 37da87bdcfb1..1443080868da 100644
--- a/tools/power/cpupower/lib/cpufreq.c
+++ b/tools/power/cpupower/lib/cpufreq.c
@@ -810,3 +810,9 @@ int amd_pstate_boost_enabled(unsigned int cpu)
 
 	return cpuinfo_max == amd_pstate_max ? 1 : 0;
 }
+
+unsigned amd_pstate_get_data(unsigned int cpu, enum amd_pstate_param param)
+{
+	return sysfs_cpufreq_get_one_value(cpu,
+					   param + AMD_PSTATE_HIGHEST_PERF);
+}
diff --git a/tools/power/cpupower/lib/cpufreq.h b/tools/power/cpupower/lib/cpufreq.h
index d54d02a7a4f4..954e72704fc0 100644
--- a/tools/power/cpupower/lib/cpufreq.h
+++ b/tools/power/cpupower/lib/cpufreq.h
@@ -206,6 +206,19 @@ int cpufreq_set_frequency(unsigned int cpu,
 int amd_pstate_boost_support(unsigned int cpu);
 int amd_pstate_boost_enabled(unsigned int cpu);
 
+enum amd_pstate_param {
+	HIGHEST_PERF,
+	NOMINAL_PERF,
+	LOWEST_NONLINEAR_PERF,
+	LOWEST_PERF,
+	MAX_FREQ,
+	NOMINAL_FREQ,
+	LOWEST_NONLINEAR_FREQ,
+	MIN_FREQ,
+};
+
+unsigned amd_pstate_get_data(unsigned int cpu, enum amd_pstate_param param);
+
 #ifdef __cplusplus
 }
 #endif
-- 
2.25.1