58 lines
2.2 KiB
Diff
58 lines
2.2 KiB
Diff
From 381dea7a1598760dcffcbce4f819bbe7035a3b13 Mon Sep 17 00:00:00 2001
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From: Yicong Yang <yangyicong@hisilicon.com>
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Date: Mon, 14 Aug 2023 21:16:42 +0800
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Subject: [PATCH 55/55] perf/smmuv3: Add MODULE_ALIAS for module auto loading
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mainline inclusion
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from mainline-v6.6-rc1
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commit 1b0e3ea9301a422003d385cda8f8dee6c878ad05
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category: bugfix
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bugzilla: https://gitee.com/openeuler/kernel/issues/I8AU2M
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Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1b0e3ea9301a422003d385cda8f8dee6c878ad05
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------------------------------------------------------------------
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On my ACPI based arm64 server, if the SMMUv3 PMU is configured as
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module it won't be loaded automatically after booting even if the
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device has already been scanned and added. It's because the module
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lacks a platform alias, the uevent mechanism and userspace tools
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like udevd make use of this to find the target driver module of the
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device. This patch adds the missing platform alias of the module,
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then module will be loaded automatically if device exists.
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Before this patch:
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[root@localhost tmp]# modinfo arm_smmuv3_pmu | grep alias
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alias: of:N*T*Carm,smmu-v3-pmcgC*
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alias: of:N*T*Carm,smmu-v3-pmcg
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After this patch:
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[root@localhost tmp]# modinfo arm_smmuv3_pmu | grep alias
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alias: platform:arm-smmu-v3-pmcg
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alias: of:N*T*Carm,smmu-v3-pmcgC*
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alias: of:N*T*Carm,smmu-v3-pmcg
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Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
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Link: https://lore.kernel.org/r/20230814131642.65263-1-yangyicong@huawei.com
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Signed-off-by: Will Deacon <will@kernel.org>
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Signed-off-by: hongrongxuan <hongrongxuan@huawei.com>
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---
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drivers/perf/arm_smmuv3_pmu.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c
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index 56e6f6773675..1fae44c24ff9 100644
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--- a/drivers/perf/arm_smmuv3_pmu.c
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+++ b/drivers/perf/arm_smmuv3_pmu.c
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@@ -941,6 +941,7 @@ static void __exit arm_smmu_pmu_exit(void)
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module_exit(arm_smmu_pmu_exit);
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+MODULE_ALIAS("platform:arm-smmu-v3-pmcg");
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MODULE_DESCRIPTION("PMU driver for ARM SMMUv3 Performance Monitors Extension");
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MODULE_AUTHOR("Neil Leeder <nleeder@codeaurora.org>");
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MODULE_AUTHOR("Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>");
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--
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2.27.0
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