[PATCH v2 3/3] cpufreq/amd-pstate: Show a warning if missing EPP tunings
From: "Mario Limonciello (AMD)" <superm1@kernel.org>
Date: 2026-09-08 04:19:43
Also in:
lkml
Subsystem:
amd pstate driver, cpu frequency scaling framework, the rest · Maintainers:
Huang Rui, Mario Limonciello, "Rafael J. Wysocki", Viresh Kumar, Linus Torvalds
EPP tunings are going to be more important going forward. Show a warning if on a heterogenous platform without them. Suggested-by: Christian Ludloff <redacted> Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org> --- drivers/cpufreq/amd-pstate.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 543ec143efc94..7c1f8ca7b7f72 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c@@ -2390,8 +2390,12 @@ static void __init amd_pstate_init_epp_values(void) const struct x86_cpu_id *id = x86_match_cpu(amd_pstate_epp_soc_ids); const struct amd_pstate_epp_soc *soc; - if (!id || !id->driver_data) + if (!id || !id->driver_data) { + if (cpu_feature_enabled(X86_FEATURE_ZEN6) && + cpu_feature_enabled(X86_FEATURE_AMD_HTR_CORES)) + pr_warn_once("No EPP tunings found for platform\n"); return; + } soc = (const struct amd_pstate_epp_soc *)id->driver_data;
--
2.43.0