From bb9a9bf2787fbe1a4e003daabc8f7a31c17740d6 Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada Date: Tue, 20 Aug 2024 13:45:58 -0700 Subject: platform/x86/intel-uncore-freq: Do not present separate package-die domain MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The scope of uncore control is per power domain with TPMI. There are two types of processor topologies can be presented by CPUID extended topology leaf irrespective of the hardware architecture: 1. A die is not enumerated in CPUID. In this case there is only one die in a package is visible. In this case there can be multiple power domains in a single die. 2. A power domain in a package is enumerated as a die in CPUID. So there is one power domain per die. To allow die level controls, the current implementation creates a root domain and aggregates all information from power domains in it. This is well suited for configuration 1 above. But for configuration 2 above, the root domain will present the same information as present by power domain. So, no use of aggregating. To check the configuration, call topology_max_dies_per_package(). If it is more than one, avoid creating root domain. Signed-off-by: Srinivas Pandruvada Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20240820204558.1296319-1-srinivas.pandruvada@linux.intel.com Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede --- .../platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'drivers/platform') diff --git a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c index 9fa3037c03d1..6c2e607968f2 100644 --- a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c +++ b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c @@ -427,6 +427,9 @@ static int uncore_probe(struct auxiliary_device *auxdev, const struct auxiliary_ auxiliary_set_drvdata(auxdev, tpmi_uncore); + if (topology_max_dies_per_package() > 1) + return 0; + tpmi_uncore->root_cluster.root_domain = true; tpmi_uncore->root_cluster.uncore_root = tpmi_uncore; @@ -450,7 +453,9 @@ static void uncore_remove(struct auxiliary_device *auxdev) { struct tpmi_uncore_struct *tpmi_uncore = auxiliary_get_drvdata(auxdev); - uncore_freq_remove_die_entry(&tpmi_uncore->root_cluster.uncore_data); + if (tpmi_uncore->root_cluster.root_domain) + uncore_freq_remove_die_entry(&tpmi_uncore->root_cluster.uncore_data); + remove_cluster_entries(tpmi_uncore); uncore_freq_common_exit(); -- cgit v1.2.3