linux-kernel - [PATCH v7 10/10] cpupower: Add "perf" option to print AMD P-State information

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Message-ID: <20220222153426.2216974-11-ray.huang@amd.com>
Date:   Tue, 22 Feb 2022 23:34:26 +0800
From:   Huang Rui <ray.huang@....com>
To:     Shuah Khan <skhan@...uxfoundation.org>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        <linux-pm@...r.kernel.org>
CC:     Deepak Sharma <deepak.sharma@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Mario Limonciello <mario.limonciello@....com>,
        Steven Noonan <steven@...vesoftware.com>,
        Nathan Fontenot <nathan.fontenot@....com>,
        Jinzhou Su <Jinzhou.Su@....com>,
        Xiaojian Du <Xiaojian.Du@....com>,
        Perry Yuan <Perry.Yuan@....com>,
        Jassmine Meng <li.meng@....com>,
        Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        "Giovanni Gherdovich" <ggherdovich@...e.cz>,
        <linux-kernel@...r.kernel.org>, Huang Rui <ray.huang@....com>
Subject: [PATCH v7 10/10] cpupower: Add "perf" option to print AMD P-State information

Add "-r --perf" option in cpupower-frequency-info to get the performance
and frequency values for AMD P-State.

Signed-off-by: Huang Rui <ray.huang@....com>
---
 .../cpupower/man/cpupower-frequency-info.1    |  3 +++
 tools/power/cpupower/utils/cpufreq-info.c     | 19 ++++++++++++++++++-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/tools/power/cpupower/man/cpupower-frequency-info.1 b/tools/power/cpupower/man/cpupower-frequency-info.1
index 6aa8d239dff9..dd545b499480 100644
--- a/tools/power/cpupower/man/cpupower-frequency-info.1
+++ b/tools/power/cpupower/man/cpupower-frequency-info.1
@@ -53,6 +53,9 @@ human\-readable output for the \-f, \-w, \-s and \-y parameters.
 \fB\-n\fR \fB\-\-no-rounding\fR
 Output frequencies and latencies without rounding off values.
 .TP  
+\fB\-c\fR \fB\-\-perf\fR
+Get performances and frequencies capabilities of CPPC, by reading it from hardware (only available on the hardware with CPPC).
+.TP
 .SH "REMARKS"
 .LP 
 By default only values of core zero are displayed. How to display settings of
diff --git a/tools/power/cpupower/utils/cpufreq-info.c b/tools/power/cpupower/utils/cpufreq-info.c
index 235243ec5ce0..0646f615fe2d 100644
--- a/tools/power/cpupower/utils/cpufreq-info.c
+++ b/tools/power/cpupower/utils/cpufreq-info.c
@@ -438,6 +438,17 @@ static int get_latency(unsigned int cpu, unsigned int human)
 	return 0;
 }
 
+/* --performance / -c */
+
+static int get_perf_cap(unsigned int cpu)
+{
+	if (cpupower_cpu_info.vendor == X86_VENDOR_AMD &&
+	    cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATE)
+		amd_pstate_show_perf_and_freq(cpu, no_rounding);
+
+	return 0;
+}
+
 static void debug_output_one(unsigned int cpu)
 {
 	struct cpufreq_available_frequencies *freqs;
@@ -466,6 +477,7 @@ static void debug_output_one(unsigned int cpu)
 	if (get_freq_hardware(cpu, 1) < 0)
 		get_freq_kernel(cpu, 1);
 	get_boost_mode(cpu);
+	get_perf_cap(cpu);
 }
 
 static struct option info_opts[] = {
@@ -484,6 +496,7 @@ static struct option info_opts[] = {
 	{"proc",	 no_argument,		 NULL,	 'o'},
 	{"human",	 no_argument,		 NULL,	 'm'},
 	{"no-rounding", no_argument,	 NULL,	 'n'},
+	{"performance", no_argument,	 NULL,	 'c'},
 	{ },
 };
 
@@ -497,7 +510,7 @@ int cmd_freq_info(int argc, char **argv)
 	int output_param = 0;
 
 	do {
-		ret = getopt_long(argc, argv, "oefwldpgrasmybn", info_opts,
+		ret = getopt_long(argc, argv, "oefwldpgrasmybnc", info_opts,
 				  NULL);
 		switch (ret) {
 		case '?':
@@ -520,6 +533,7 @@ int cmd_freq_info(int argc, char **argv)
 		case 'e':
 		case 's':
 		case 'y':
+		case 'c':
 			if (output_param) {
 				output_param = -1;
 				cont = 0;
@@ -626,6 +640,9 @@ int cmd_freq_info(int argc, char **argv)
 		case 'y':
 			ret = get_latency(cpu, human);
 			break;
+		case 'c':
+			ret = get_perf_cap(cpu);
+			break;
 		}
 		if (ret)
 			return ret;
-- 
2.25.1