2 * linux/include/linux/nmi.h
7 #include <linux/sched.h>
11 * touch_nmi_watchdog - restart NMI watchdog timeout.
13 * If the architecture supports the NMI watchdog, touch_nmi_watchdog()
14 * may be used to reset the timeout - for code which intentionally
15 * disables interrupts for a long time. This call is stateless.
17 #if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR)
19 extern void touch_nmi_watchdog(void);
21 static inline void touch_nmi_watchdog(void)
23 touch_softlockup_watchdog();
27 #if defined(CONFIG_HARDLOCKUP_DETECTOR)
28 extern void hardlockup_detector_disable(void);
30 static inline void hardlockup_detector_disable(void) {}
34 * Create trigger_all_cpu_backtrace() out of the arch-provided
35 * base function. Return whether such support was available,
36 * to allow calling code to fall back to some other mechanism:
38 #ifdef arch_trigger_cpumask_backtrace
39 static inline bool trigger_all_cpu_backtrace(void)
41 arch_trigger_cpumask_backtrace(cpu_online_mask, false);
45 static inline bool trigger_allbutself_cpu_backtrace(void)
47 arch_trigger_cpumask_backtrace(cpu_online_mask, true);
51 static inline bool trigger_cpumask_backtrace(struct cpumask *mask)
53 arch_trigger_cpumask_backtrace(mask, false);
57 static inline bool trigger_single_cpu_backtrace(int cpu)
59 arch_trigger_cpumask_backtrace(cpumask_of(cpu), false);
63 /* generic implementation */
64 void nmi_trigger_cpumask_backtrace(const cpumask_t *mask,
66 void (*raise)(cpumask_t *mask));
67 bool nmi_cpu_backtrace(struct pt_regs *regs);
70 static inline bool trigger_all_cpu_backtrace(void)
74 static inline bool trigger_allbutself_cpu_backtrace(void)
78 static inline bool trigger_cpumask_backtrace(struct cpumask *mask)
82 static inline bool trigger_single_cpu_backtrace(int cpu)
88 #ifdef CONFIG_LOCKUP_DETECTOR
89 u64 hw_nmi_get_sample_period(int watchdog_thresh);
90 extern int nmi_watchdog_enabled;
91 extern int soft_watchdog_enabled;
92 extern int watchdog_user_enabled;
93 extern int watchdog_thresh;
94 extern unsigned long *watchdog_cpumask_bits;
95 extern int sysctl_softlockup_all_cpu_backtrace;
96 extern int sysctl_hardlockup_all_cpu_backtrace;
98 extern int proc_watchdog(struct ctl_table *, int ,
99 void __user *, size_t *, loff_t *);
100 extern int proc_nmi_watchdog(struct ctl_table *, int ,
101 void __user *, size_t *, loff_t *);
102 extern int proc_soft_watchdog(struct ctl_table *, int ,
103 void __user *, size_t *, loff_t *);
104 extern int proc_watchdog_thresh(struct ctl_table *, int ,
105 void __user *, size_t *, loff_t *);
106 extern int proc_watchdog_cpumask(struct ctl_table *, int,
107 void __user *, size_t *, loff_t *);
108 extern int lockup_detector_suspend(void);
109 extern void lockup_detector_resume(void);
111 static inline int lockup_detector_suspend(void)
116 static inline void lockup_detector_resume(void)
121 #ifdef CONFIG_HAVE_ACPI_APEI_NMI