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

Huang Rui
2021-09-08T15:01:44Z

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

Signed-off-by: Huang Rui <ray.huang@amd.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