From: Minda Chen <minda.chen@starfivetech.com>
Date: Thu, 2 Mar 2023 09:16:01 +0000 (+0800)
Subject: perf:sbi: disable cpu hotplug callback.
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3df1ffa634c65a91f3888ff3d9761708ff64e314;p=platform%2Fkernel%2Flinux-starfive.git

perf:sbi: disable cpu hotplug callback.

register cpu hotplug callback will cause dhrystone
and coremark benchmark reduce the scores. this CPU
hotplug ops will do in sbi cpu/on and off. So disable
this no side effect.

Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
---

diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c
index 15ab3dc68e7a..13902dfd6bcc 100644
--- a/drivers/perf/riscv_pmu_sbi.c
+++ b/drivers/perf/riscv_pmu_sbi.c
@@ -776,9 +776,11 @@ static int pmu_sbi_device_probe(struct platform_device *pdev)
 	}
 	pdev->dev.groups = pmu_sbi_groups;
 
+#ifndef CONFIG_SOC_STARFIVE
 	ret = cpuhp_state_add_instance(CPUHP_AP_PERF_RISCV_STARTING, &pmu->node);
 	if (ret)
 		return ret;
+#endif
 
 	ret = perf_pmu_register(&pmu->pmu, "cpu", PERF_TYPE_RAW);
 	if (ret) {