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| author | Ayush Jain <ayush.jain3@amd.com> | 2023-11-03 15:18:15 +0530 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2023-11-29 22:04:15 +0100 |
| commit | 142c169b31beb364ef39385b4e88735bd51d37fe (patch) | |
| tree | fb2db8a194eec7faea4f85319584b1de6f02e517 | |
| parent | febab20caebac959fdc3d7520bc52de8b1184455 (diff) | |
| download | linux-xfs-142c169b31beb364ef39385b4e88735bd51d37fe.tar.gz | |
cpufreq/amd-pstate: Only print supported EPP values for performance governor
show_energy_performance_available_preferences() to show only supported
values which is performance in performance governor policy.
-------Before--------
$ cat /sys/devices/system/cpu/cpu1/cpufreq/scaling_driver
amd-pstate-epp
$ cat /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
performance
$ cat /sys/devices/system/cpu/cpu1/cpufreq/energy_performance_preference
performance
$ cat /sys/devices/system/cpu/cpu1/cpufreq/energy_performance_available_preferences
default performance balance_performance balance_power power
-------After--------
$ cat /sys/devices/system/cpu/cpu1/cpufreq/scaling_driver
amd-pstate-epp
$ cat /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
performance
$ cat /sys/devices/system/cpu/cpu1/cpufreq/energy_performance_preference
performance
$ cat /sys/devices/system/cpu/cpu1/cpufreq/energy_performance_available_preferences
performance
Fixes: ffa5096a7c33 ("cpufreq: amd-pstate: implement Pstate EPP support for the AMD processors")
Suggested-by: Wyes Karny <wyes.karny@amd.com>
Signed-off-by: Ayush Jain <ayush.jain3@amd.com>
Reviewed-by: Wyes Karny <wyes.karny@amd.com>
Acked-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/cpufreq/amd-pstate.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 3313d1d2c6ddf0..1f6186475715e0 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -882,11 +882,16 @@ static ssize_t show_energy_performance_available_preferences( { int i = 0; int offset = 0; + struct amd_cpudata *cpudata = policy->driver_data; + + if (cpudata->policy == CPUFREQ_POLICY_PERFORMANCE) + return sysfs_emit_at(buf, offset, "%s\n", + energy_perf_strings[EPP_INDEX_PERFORMANCE]); while (energy_perf_strings[i] != NULL) offset += sysfs_emit_at(buf, offset, "%s ", energy_perf_strings[i++]); - sysfs_emit_at(buf, offset, "\n"); + offset += sysfs_emit_at(buf, offset, "\n"); return offset; } |