From bfea2b3b4f2346510ec45a0c22450e1564f48f88 Mon Sep 17 00:00:00 2001 From: Mario Limonciello Date: Mon, 9 Jun 2025 15:05:15 -0500 Subject: [PATCH] cpufreq/amd-pstate: Disable preferred cores on designs with workload classification MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Gautham R. Shenoy Reviewed-by: Perry Yuan Acked-by: Ilpo Järvinen 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 f3477ab37742..bbc27ef9edf7 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. */ -- 2.47.2