The following commit has been merged into the x86/platform branch of tip:
Commit-ID: bfea2b3b4f2346510ec45a0c22450e1564f48f88
Gitweb: https://git.kernel.org/tip/bfea2b3b4f2346510ec45a0c22450e1564f48f88
Author: Mario Limonciello <mario.limonciello@amd.com>
AuthorDate: Mon, 09 Jun 2025 15:05:15 -05:00
Committer: Borislav Petkov (AMD) <bp@alien8.de>
CommitterDate: Mon, 07 Jul 2025 22:33:10 +02:00
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: 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
---
drivers/cpufreq/amd-pstate.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index f3477ab..bbc27ef 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -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. */