NMI: Enable arm-pmu interrupt as NMI in Acensed.

ascend inclusion
category: feature
bugzilla: NA
CVE: NA

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

For Ascend platform,automatically opens enable_pseudo_nmi
and pmu_nmi_enable.
Signed-off-by: NXu Qiang <xuqiang36@huawei.com>
Reviewed-by: NDing Tianhong <dingtianhong@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: NCheng Jian <cj.chengjian@huawei.com>

arch/arm64/include/asm/cpufeature.h

@@ -91,6 +91,10 @@ extern struct arm64_ftr_reg arm64_ftr_reg_ctrel0;
 
 int arm64_cpu_ftr_regs_traverse(int (*op)(u32, u64, void *), void *argp);
 
+#ifdef CONFIG_ARM64_PSEUDO_NMI
+extern bool enable_pseudo_nmi;
+#endif
+
 /*
  * CPU capabilities:
  *

arch/arm64/kernel/cpufeature.c

@@ -1230,7 +1230,7 @@ ssize_t cpu_show_meltdown(struct device *dev, struct device_attribute *attr,
 }
 
 #ifdef CONFIG_ARM64_PSEUDO_NMI
-static bool enable_pseudo_nmi;
+bool enable_pseudo_nmi;
 
 static int __init early_enable_pseudo_nmi(char *p)
 {

arch/arm64/mm/init.c

@@ -769,6 +769,9 @@ __setup("keepinitrd", keepinitrd_setup);
 #endif
 
 #ifdef CONFIG_ASCEND_FEATURES
+
+#include <linux/perf/arm_pmu.h>
+
 void ascend_enable_all_features(void)
 {
 	if (IS_ENABLED(CONFIG_ASCEND_DVPP_MMAP))
@@ -782,6 +785,13 @@ void ascend_enable_all_features(void)
 
 	if (IS_ENABLED(CONFIG_SUSPEND))
 		mem_sleep_current = PM_SUSPEND_ON;
+
+	if (IS_ENABLED(CONFIG_PMU_WATCHDOG))
+		pmu_nmi_enable = true;
+
+#ifdef CONFIG_ARM64_PSEUDO_NMI
+	enable_pseudo_nmi = true;
+#endif
 }
 
 static int __init ascend_enable_setup(char *__unused)
@@ -791,7 +801,7 @@ static int __init ascend_enable_setup(char *__unused)
 	return 1;
 }
 
-__setup("ascend_enable_all", ascend_enable_setup);
+early_param("ascend_enable_all", ascend_enable_setup);
 #endif