Commit bfea2b3b authored by Mario Limonciello's avatar Mario Limonciello Committed by Borislav Petkov (AMD)
Browse files

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



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: default avatarMario Limonciello <mario.limonciello@amd.com>
Signed-off-by: default avatarBorislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: default avatarGautham R. Shenoy <gautham.shenoy@amd.com>
Reviewed-by: default avatarPerry Yuan <perry.yuan@amd.com>
Acked-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/20250609200518.3616080-11-superm1@kernel.org
parent 9e8f6bf7

drivers/cpufreq/amd-pstate.c

+7 −0
Original line number Diff line number Diff line
@@ -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. */