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| author | Dhananjay Ugwekar <Dhananjay.Ugwekar@amd.com> | 2024-05-27 10:41:28 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-06-16 13:47:41 +0200 |
| commit | 8f893e52b9e030a25ea62e31271bf930b01f2f07 (patch) | |
| tree | a9d712c6d75cd79892c01765d6121242d820ede9 | |
| parent | b54d24eb4a67ba9534f14b014756246ef1f704d1 (diff) | |
| download | linux-8f893e52b9e030a25ea62e31271bf930b01f2f07.tar.gz linux-8f893e52b9e030a25ea62e31271bf930b01f2f07.tar.bz2 linux-8f893e52b9e030a25ea62e31271bf930b01f2f07.zip | |
cpufreq: amd-pstate: Fix the inconsistency in max frequency units
commit e4731baaf29438508197d3a8a6d4f5a8c51663f8 upstream.
The nominal frequency in cpudata is maintained in MHz whereas all other
frequencies are in KHz. This means we have to convert nominal frequency
value to KHz before we do any interaction with other frequency values.
In amd_pstate_set_boost(), this conversion from MHz to KHz is missed,
fix that.
Tested on a AMD Zen4 EPYC server
Before:
$ cat /sys/devices/system/cpu/cpufreq/policy*/scaling_max_freq | uniq
2151
$ cat /sys/devices/system/cpu/cpufreq/policy*/cpuinfo_min_freq | uniq
400000
$ cat /sys/devices/system/cpu/cpufreq/policy*/scaling_cur_freq | uniq
2151
409422
After:
$ cat /sys/devices/system/cpu/cpufreq/policy*/scaling_max_freq | uniq
2151000
$ cat /sys/devices/system/cpu/cpufreq/policy*/cpuinfo_min_freq | uniq
400000
$ cat /sys/devices/system/cpu/cpufreq/policy*/scaling_cur_freq | uniq
2151000
1799527
Fixes: ec437d71db77 ("cpufreq: amd-pstate: Introduce a new AMD P-State driver to support future processors")
Signed-off-by: Dhananjay Ugwekar <Dhananjay.Ugwekar@amd.com>
Acked-by: Mario Limonciello <mario.limonciello@amd.com>
Acked-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Tested-by: Peter Jung <ptr1337@cachyos.org>
Cc: 5.17+ <stable@vger.kernel.org> # 5.17+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/cpufreq/amd-pstate.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 07f341995439..b8fdfd2c4f6f 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -675,7 +675,7 @@ static int amd_pstate_set_boost(struct cpufreq_policy *policy, int state) if (state) policy->cpuinfo.max_freq = cpudata->max_freq; else - policy->cpuinfo.max_freq = cpudata->nominal_freq; + policy->cpuinfo.max_freq = cpudata->nominal_freq * 1000; policy->max = policy->cpuinfo.max_freq; |