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authorYicong Yang <yangyicong@hisilicon.com>2023-08-14 21:16:42 +0800
committerWill Deacon <will@kernel.org>2023-08-15 12:53:04 +0100
commit1b0e3ea9301a422003d385cda8f8dee6c878ad05 (patch)
tree198cbc4e9abd560ab615e288dd4fa764298972ba /drivers/perf
parent0242737dc4eb9f6e9a5ea594b3f93efa0b12f28d (diff)
perf/smmuv3: Add MODULE_ALIAS for module auto loading
On my ACPI based arm64 server, if the SMMUv3 PMU is configured as module it won't be loaded automatically after booting even if the device has already been scanned and added. It's because the module lacks a platform alias, the uevent mechanism and userspace tools like udevd make use of this to find the target driver module of the device. This patch adds the missing platform alias of the module, then module will be loaded automatically if device exists. Before this patch: [root@localhost tmp]# modinfo arm_smmuv3_pmu | grep alias alias: of:N*T*Carm,smmu-v3-pmcgC* alias: of:N*T*Carm,smmu-v3-pmcg After this patch: [root@localhost tmp]# modinfo arm_smmuv3_pmu | grep alias alias: platform:arm-smmu-v3-pmcg alias: of:N*T*Carm,smmu-v3-pmcgC* alias: of:N*T*Carm,smmu-v3-pmcg Signed-off-by: Yicong Yang <yangyicong@hisilicon.com> Link: https://lore.kernel.org/r/20230814131642.65263-1-yangyicong@huawei.com Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/perf')
-rw-r--r--drivers/perf/arm_smmuv3_pmu.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c
index 0e17c57ddb87..6303b82566f9 100644
--- a/drivers/perf/arm_smmuv3_pmu.c
+++ b/drivers/perf/arm_smmuv3_pmu.c
@@ -1028,6 +1028,7 @@ static void __exit arm_smmu_pmu_exit(void)
module_exit(arm_smmu_pmu_exit);
+MODULE_ALIAS("platform:arm-smmu-v3-pmcg");
MODULE_DESCRIPTION("PMU driver for ARM SMMUv3 Performance Monitors Extension");
MODULE_AUTHOR("Neil Leeder <nleeder@codeaurora.org>");
MODULE_AUTHOR("Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>");