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cpufreq/amd-pstate: Disable preferred cores on designs with workload classification

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On designs that have workload classification, it's preferred that
the amd-hfi driver is used to provide hints to the scheduler of
which cores to use instead of the amd-pstate driver.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Reviewed-by: Perry Yuan <perry.yuan@amd.com>
Acked-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/20250609200518.3616080-11-superm1@kernel.org
This commit is contained in:
Mario Limonciello 2025-06-09 15:05:15 -05:00 committed by Borislav Petkov (AMD)
parent 9e8f6bf782
commit bfea2b3b4f
1 changed files with 7 additions and 0 deletions
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7
drivers/cpufreq/amd-pstate.c
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@ -826,6 +826,13 @@ static void amd_pstate_init_prefcore(struct amd_cpudata *cpudata)
if (!amd_pstate_prefcore)
return;
/* should use amd-hfi instead */
if (cpu_feature_enabled(X86_FEATURE_AMD_WORKLOAD_CLASS) &&
IS_ENABLED(CONFIG_AMD_HFI)) {
amd_pstate_prefcore = false;
return;
}
cpudata->hw_prefcore = true;
/* Priorities must be initialized before ITMT support can be toggled on. */