1 files changed, 117 insertions, 0 deletions
diff --git a/include/linux/nmi.h b/include/linux/nmi.h
new file mode 100644
index 000000000000..dbda77dc510c
--- /dev/null
+++ b/include/linux/nmi.h
@@ -0,0 +1,117 @@
+/*
+ *  linux/include/linux/nmi.h
+ */
+#ifndef LINUX_NMI_H
+#define LINUX_NMI_H
+
+#include <linux/sched.h>
+#include <asm/irq.h>
+
+/**
+ * touch_nmi_watchdog - restart NMI watchdog timeout.
+ * 
+ * If the architecture supports the NMI watchdog, touch_nmi_watchdog()
+ * may be used to reset the timeout - for code which intentionally
+ * disables interrupts for a long time. This call is stateless.
+ */
+#if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR_NMI)
+#include <asm/nmi.h>
+#endif
+
+#if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR)
+extern void touch_nmi_watchdog(void);
+#else
+static inline void touch_nmi_watchdog(void)
+{
+	touch_softlockup_watchdog();
+}
+#endif
+
+#if defined(CONFIG_HARDLOCKUP_DETECTOR)
+extern void hardlockup_detector_disable(void);
+#else
+static inline void hardlockup_detector_disable(void) {}
+#endif
+
+/*
+ * Create trigger_all_cpu_backtrace() out of the arch-provided
+ * base function. Return whether such support was available,
+ * to allow calling code to fall back to some other mechanism:
+ */
+#ifdef arch_trigger_all_cpu_backtrace
+static inline bool trigger_all_cpu_backtrace(void)
+{
+	#if defined(CONFIG_ARM64)
+	arch_trigger_all_cpu_backtrace();
+	#else
+	arch_trigger_all_cpu_backtrace(true);
+	#endif
+
+	return true;
+}
+static inline bool trigger_allbutself_cpu_backtrace(void)
+{
+	#if defined(CONFIG_ARM64)
+	arch_trigger_all_cpu_backtrace();
+	#else
+	arch_trigger_all_cpu_backtrace(false);
+	#endif
+
+	return true;
+}
+
+/* generic implementation */
+void nmi_trigger_all_cpu_backtrace(bool include_self,
+				   void (*raise)(cpumask_t *mask));
+bool nmi_cpu_backtrace(struct pt_regs *regs);
+
+#else
+static inline bool trigger_all_cpu_backtrace(void)
+{
+	return false;
+}
+static inline bool trigger_allbutself_cpu_backtrace(void)
+{
+	return false;
+}
+#endif
+
+#ifdef CONFIG_LOCKUP_DETECTOR
+int hw_nmi_is_cpu_stuck(struct pt_regs *);
+u64 hw_nmi_get_sample_period(int watchdog_thresh);
+extern int nmi_watchdog_enabled;
+extern int soft_watchdog_enabled;
+extern int watchdog_user_enabled;
+extern int watchdog_thresh;
+extern unsigned long *watchdog_cpumask_bits;
+extern int sysctl_softlockup_all_cpu_backtrace;
+extern int sysctl_hardlockup_all_cpu_backtrace;
+struct ctl_table;
+extern int proc_watchdog(struct ctl_table *, int ,
+			 void __user *, size_t *, loff_t *);
+extern int proc_nmi_watchdog(struct ctl_table *, int ,
+			     void __user *, size_t *, loff_t *);
+extern int proc_soft_watchdog(struct ctl_table *, int ,
+			      void __user *, size_t *, loff_t *);
+extern int proc_watchdog_thresh(struct ctl_table *, int ,
+				void __user *, size_t *, loff_t *);
+extern int proc_watchdog_cpumask(struct ctl_table *, int,
+				 void __user *, size_t *, loff_t *);
+extern int lockup_detector_suspend(void);
+extern void lockup_detector_resume(void);
+#else
+static inline int lockup_detector_suspend(void)
+{
+	return 0;
+}
+
+static inline void lockup_detector_resume(void)
+{
+}
+#endif
+
+#ifdef CONFIG_HAVE_ACPI_APEI_NMI
+#include <asm/nmi.h>
+#endif
+
+#endif