[PATCH v6 12/14] cpufreq: amd-pstate: add AMD P-State performance attributes
From: Huang Rui <ray.huang@amd.com>
Date: 2021-12-19 16:37:06
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lkml
Subsystem:
amd pstate driver, cpu frequency scaling framework, the rest · Maintainers:
Huang Rui, Mario Limonciello, "Rafael J. Wysocki", Viresh Kumar, Linus Torvalds
Introduce sysfs attributes to get the different level AMD P-State performances. Signed-off-by: Huang Rui <ray.huang@amd.com> --- drivers/cpufreq/amd-pstate.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index dd8c0e894532..2471a311fb4d 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c@@ -546,12 +546,30 @@ 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, };
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2.25.1