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platform/x86/intel-uncore-freq: Fix warning in partitioned system

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[ Upstream commit 6d47b4f084 ]

A partitioned system configured with only one package and one compute
die, warning will be generated for duplicate sysfs entry. This typically
occurs during the platform bring-up phase.

Partitioned systems expose dies, equivalent to TPMI compute domains,
through the CPUID. Each partitioned system must contains at least one
compute die per partition, resulting in a minimum of two dies per
package. Hence the function topology_max_dies_per_package() returns at
least two, and the condition "topology_max_dies_per_package() > 1"
prevents the creation of a root domain.

In this case topology_max_dies_per_package() will return 1 and root
domain will be created for partition 0 and a duplicate sysfs warning
for partition 1 as both partitions have same package ID.

To address this also check for non zero partition in addition to
topology_max_dies_per_package() > 1.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20250819211034.3776284-1-srinivas.pandruvada@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Srinivas Pandruvada
2025-08-19 14:10:34 -07:00
committed by Greg Kroah-Hartman
parent 79670b12a4
commit 2f95f8cbc5
1 changed files with 1 additions and 1 deletions
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2
drivers/platform/x86/intel/uncore-frequency/uncore-frequency-tpmi.c
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@@ -589,7 +589,7 @@ static int uncore_probe(struct auxiliary_device *auxdev, const struct auxiliary_
auxiliary_set_drvdata(auxdev, tpmi_uncore);
if (topology_max_dies_per_package() > 1)
if (topology_max_dies_per_package() > 1 || plat_info->partition)
return 0;
tpmi_uncore->root_cluster.root_domain = true;