drivers/perf: fixed the issue that the kabi value changed

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5KAX7

--------------------------------------------------------------------------

Fixed the issue that the kabi value changed when the HiSilicon PMU driver
added the enum variable in "enum cpuhp_state{}".

The hisi_pcie_pmu and hisi_cpa_pmu drivers to replace the explicit specify
hotplug events with dynamic allocation hotplug events(CPUHP_AP_ONLINE_DYN).
The states between *CPUHP_AP_ONLINE_DYN* and *CPUHP_AP_ONLINE_DYN_END* are
reserved for the dynamic allocation.
Signed-off-by: NJunhao He <hejunhao3@huawei.com>
Reviewed-by: NYicong Yang <yangyicong@huawei.com>
Reviewed-by: NYang Jihong <yangjihong1@huawei.com>
Reviewed-by: NXiongfeng Wang <wangxiongfeng2@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/perf/hisilicon/hisi_pcie_pmu.c

@@ -19,6 +19,9 @@
 #include <linux/pci.h>
 #include <linux/perf_event.h>
 
+/* Dynamic CPU hotplug state used by PCIe PMU */
+static enum cpuhp_state hisi_pcie_pmu_online;
+
 #define DRV_NAME "hisi_pcie_pmu"
 /* Define registers */
 #define HISI_PCIE_GLOBAL_CTRL		0x00
@@ -830,7 +833,7 @@ static int hisi_pcie_init_pmu(struct pci_dev *pdev, struct hisi_pcie_pmu *pcie_p
 	if (ret)
 		goto err_iounmap;
 
-	ret = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_HISI_PCIE_PMU_ONLINE, &pcie_pmu->node);
+	ret = cpuhp_state_add_instance(hisi_pcie_pmu_online, &pcie_pmu->node);
 	if (ret) {
 		pci_err(pdev, "Failed to register hotplug: %d\n", ret);
 		goto err_irq_unregister;
@@ -845,8 +848,7 @@ static int hisi_pcie_init_pmu(struct pci_dev *pdev, struct hisi_pcie_pmu *pcie_p
 	return ret;
 
 err_hotplug_unregister:
-	cpuhp_state_remove_instance_nocalls(
-		CPUHP_AP_PERF_ARM_HISI_PCIE_PMU_ONLINE, &pcie_pmu->node);
+	cpuhp_state_remove_instance_nocalls(hisi_pcie_pmu_online, &pcie_pmu->node);
 
 err_irq_unregister:
 	hisi_pcie_pmu_irq_unregister(pdev, pcie_pmu);
@@ -862,8 +864,7 @@ static void hisi_pcie_uninit_pmu(struct pci_dev *pdev)
 	struct hisi_pcie_pmu *pcie_pmu = pci_get_drvdata(pdev);
 
 	perf_pmu_unregister(&pcie_pmu->pmu);
-	cpuhp_state_remove_instance_nocalls(
-		CPUHP_AP_PERF_ARM_HISI_PCIE_PMU_ONLINE, &pcie_pmu->node);
+	cpuhp_state_remove_instance_nocalls(hisi_pcie_pmu_online, &pcie_pmu->node);
 	hisi_pcie_pmu_irq_unregister(pdev, pcie_pmu);
 	iounmap(pcie_pmu->base);
 }
@@ -934,18 +935,19 @@ static int __init hisi_pcie_module_init(void)
 {
 	int ret;
 
-	ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_HISI_PCIE_PMU_ONLINE,
-				      "AP_PERF_ARM_HISI_PCIE_PMU_ONLINE",
+	ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN,
+				      "perf/hisi/pcie:online",
 				      hisi_pcie_pmu_online_cpu,
 				      hisi_pcie_pmu_offline_cpu);
-	if (ret) {
+	if (ret < 0) {
 		pr_err("Failed to setup PCIe PMU hotplug: %d\n", ret);
 		return ret;
 	}
+	hisi_pcie_pmu_online = ret;
 
 	ret = pci_register_driver(&hisi_pcie_pmu_driver);
 	if (ret)
-		cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_PCIE_PMU_ONLINE);
+		cpuhp_remove_multi_state(hisi_pcie_pmu_online);
 
 	return ret;
 }
@@ -954,7 +956,7 @@ module_init(hisi_pcie_module_init);
 static void __exit hisi_pcie_module_exit(void)
 {
 	pci_unregister_driver(&hisi_pcie_pmu_driver);
-	cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_PCIE_PMU_ONLINE);
+	cpuhp_remove_multi_state(hisi_pcie_pmu_online);
 }
 module_exit(hisi_pcie_module_exit);
 

drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c

@@ -19,6 +19,9 @@
 
 #include "hisi_uncore_pmu.h"
 
+/* Dynamic CPU hotplug state used by CPA PMU */
+static enum cpuhp_state hisi_cpa_pmu_online;
+
 /* CPA register definition */
 #define CPA_PERF_CTRL		0x1c00
 #define CPA_EVENT_CTRL		0x1c04
@@ -334,8 +337,7 @@ static int hisi_cpa_pmu_probe(struct platform_device *pdev)
 
 	/* Power Management should be disabled before using CPA PMU. */
 	hisi_cpa_pmu_disable_pm(cpa_pmu);
-	ret = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_HISI_CPA_ONLINE,
-				       &cpa_pmu->node);
+	ret = cpuhp_state_add_instance(hisi_cpa_pmu_online, &cpa_pmu->node);
 	if (ret) {
 		dev_err(&pdev->dev, "Error %d registering hotplug\n", ret);
 		hisi_cpa_pmu_enable_pm(cpa_pmu);
@@ -345,8 +347,7 @@ static int hisi_cpa_pmu_probe(struct platform_device *pdev)
 	ret = perf_pmu_register(&cpa_pmu->pmu, name, -1);
 	if (ret) {
 		dev_err(cpa_pmu->dev, "PMU register failed\n");
-		cpuhp_state_remove_instance_nocalls(
-			CPUHP_AP_PERF_ARM_HISI_CPA_ONLINE, &cpa_pmu->node);
+		cpuhp_state_remove_instance_nocalls(hisi_cpa_pmu_online, &cpa_pmu->node);
 		hisi_cpa_pmu_enable_pm(cpa_pmu);
 		return ret;
 	}
@@ -360,8 +361,7 @@ static int hisi_cpa_pmu_remove(struct platform_device *pdev)
 	struct hisi_pmu *cpa_pmu = platform_get_drvdata(pdev);
 
 	perf_pmu_unregister(&cpa_pmu->pmu);
-	cpuhp_state_remove_instance_nocalls(CPUHP_AP_PERF_ARM_HISI_CPA_ONLINE,
-					    &cpa_pmu->node);
+	cpuhp_state_remove_instance_nocalls(hisi_cpa_pmu_online, &cpa_pmu->node);
 	hisi_cpa_pmu_enable_pm(cpa_pmu);
 	return 0;
 }
@@ -380,18 +380,19 @@ static int __init hisi_cpa_pmu_module_init(void)
 {
 	int ret;
 
-	ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_HISI_CPA_ONLINE,
-				      "AP_PERF_ARM_HISI_CPA_ONLINE",
+	ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN,
+				      "pmu/hisi/cpa:online",
 				      hisi_uncore_pmu_online_cpu,
 				      hisi_uncore_pmu_offline_cpu);
-	if (ret) {
+	if (ret < 0) {
 		pr_err("setup hotplug failed: %d\n", ret);
 		return ret;
 	}
+	hisi_cpa_pmu_online = ret;
 
 	ret = platform_driver_register(&hisi_cpa_pmu_driver);
 	if (ret)
-		cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_CPA_ONLINE);
+		cpuhp_remove_multi_state(hisi_cpa_pmu_online);
 
 	return ret;
 }
@@ -400,7 +401,7 @@ module_init(hisi_cpa_pmu_module_init);
 static void __exit hisi_cpa_pmu_module_exit(void)
 {
 	platform_driver_unregister(&hisi_cpa_pmu_driver);
-	cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_CPA_ONLINE);
+	cpuhp_remove_multi_state(hisi_cpa_pmu_online);
 }
 module_exit(hisi_cpa_pmu_module_exit);
 

include/linux/cpuhotplug.h

@@ -173,17 +173,11 @@ enum cpuhp_state {
 	CPUHP_AP_PERF_S390_SF_ONLINE,
 	CPUHP_AP_PERF_ARM_CCI_ONLINE,
 	CPUHP_AP_PERF_ARM_CCN_ONLINE,
-	#ifndef __GENKSYMS__
-	CPUHP_AP_PERF_ARM_HISI_CPA_ONLINE,
-	#endif
 	CPUHP_AP_PERF_ARM_HISI_DDRC_ONLINE,
 	CPUHP_AP_PERF_ARM_HISI_HHA_ONLINE,
 	CPUHP_AP_PERF_ARM_HISI_L3_ONLINE,
 	CPUHP_AP_PERF_ARM_HISI_PA_ONLINE,
 	CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE,
-	#ifndef __GENKSYMS__
-	CPUHP_AP_PERF_ARM_HISI_PCIE_PMU_ONLINE,
-	#endif
 	CPUHP_AP_PERF_ARM_L2X0_ONLINE,
 	CPUHP_AP_PERF_ARM_QCOM_L2_ONLINE,
 	CPUHP_AP_PERF_ARM_QCOM_L3_ONLINE,