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cpufreq/amd-pstate: Set different default EPP policy for Epyc and Ryzen

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For Ryzen systems the EPP policy set by the BIOS is generally configured
to performance as this is the default register value for the CPPC request
MSR.

If a user doesn't use additional software to configure EPP then the system
will default biased towards performance and consume extra battery. Instead
configure the default to "balanced_performance" for this case.

Suggested-by: Artem S. Tashkinov <aros@gmx.com>
Reviewed-by: Dhananjay Ugwekar <dhananjay.ugwekar@amd.com>
Tested-by: Dhananjay Ugwekar <dhananjay.ugwekar@amd.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219526
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Link: https://lore.kernel.org/r/20241209185248.16301-15-mario.limonciello@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
This commit is contained in:
Mario Limonciello
2024-12-09 12:52:47 -06:00
parent f8fde687c9
commit f9a378ff64
1 changed files with 8 additions and 4 deletions
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12
drivers/cpufreq/amd-pstate.c
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@@ -1501,8 +1501,6 @@ static int amd_pstate_epp_cpu_init(struct cpufreq_policy *policy)
policy->driver_data = cpudata;
cpudata->epp_cached = cpudata->epp_default = amd_pstate_get_epp(cpudata);
policy->min = policy->cpuinfo.min_freq;
policy->max = policy->cpuinfo.max_freq;
@@ -1513,10 +1511,13 @@ static int amd_pstate_epp_cpu_init(struct cpufreq_policy *policy)
* the default cpufreq governor is neither powersave nor performance.
*/
if (amd_pstate_acpi_pm_profile_server() ||
amd_pstate_acpi_pm_profile_undefined())
amd_pstate_acpi_pm_profile_undefined()) {
policy->policy = CPUFREQ_POLICY_PERFORMANCE;
else
cpudata->epp_default = amd_pstate_get_epp(cpudata);
} else {
policy->policy = CPUFREQ_POLICY_POWERSAVE;
cpudata->epp_default = AMD_CPPC_EPP_BALANCE_PERFORMANCE;
}
if (cpu_feature_enabled(X86_FEATURE_CPPC)) {
ret = rdmsrl_on_cpu(cpudata->cpu, MSR_AMD_CPPC_REQ, &value);
@@ -1529,6 +1530,9 @@ static int amd_pstate_epp_cpu_init(struct cpufreq_policy *policy)
return ret;
WRITE_ONCE(cpudata->cppc_cap1_cached, value);
}
ret = amd_pstate_set_epp(cpudata, cpudata->epp_default);
if (ret)
return ret;
current_pstate_driver->adjust_perf = NULL;