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Message-ID: <20211119103102.88124-13-ray.huang@amd.com>
Date: Fri, 19 Nov 2021 18:30:52 +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>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...nel.org>,
Giovanni Gherdovich <ggherdovich@...e.cz>,
<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>,
<linux-kernel@...r.kernel.org>, <x86@...nel.org>,
Huang Rui <ray.huang@....com>
Subject: [PATCH v4 12/22] 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 | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 09c5fd8bd9da..458313cdba93 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -512,12 +512,29 @@ static ssize_t show_amd_pstate_lowest_nonlinear_freq(struct cpufreq_policy *poli
return sprintf(&buf[0], "%u\n", freq);
}
+/* In some of ASICs, the highest_perf is not the one in the _CPC table, so we
+ * need to expose it to sysfs.
+ */
+static ssize_t show_amd_pstate_highest_perf(struct cpufreq_policy *policy,
+ char *buf)
+{
+ u32 perf;
+ struct amd_cpudata *cpudata = policy->driver_data;
+
+ perf = READ_ONCE(cpudata->highest_perf);
+
+ return sprintf(&buf[0], "%u\n", perf);
+}
+
cpufreq_freq_attr_ro(amd_pstate_max_freq);
cpufreq_freq_attr_ro(amd_pstate_lowest_nonlinear_freq);
+cpufreq_freq_attr_ro(amd_pstate_highest_perf);
+
static struct freq_attr *amd_pstate_attr[] = {
&amd_pstate_max_freq,
&amd_pstate_lowest_nonlinear_freq,
+ &amd_pstate_highest_perf,
NULL,
};
--
2.25.1
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