1/* 2 * linux/include/linux/nmi.h 3 */ 4#ifndef LINUX_NMI_H 5#define LINUX_NMI_H 6 7#include <linux/sched.h> 8#include <asm/irq.h> 9 10/** 11 * touch_nmi_watchdog - restart NMI watchdog timeout. 12 * 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. 16 */ 17#if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR) 18#include <asm/nmi.h> 19extern void touch_nmi_watchdog(void); 20#else 21static inline void touch_nmi_watchdog(void) 22{ 23 touch_softlockup_watchdog(); 24} 25#endif 26 27#if defined(CONFIG_HARDLOCKUP_DETECTOR) 28extern void hardlockup_detector_disable(void); 29#else 30static inline void hardlockup_detector_disable(void) 31{ 32} 33#endif 34 35/* 36 * Create trigger_all_cpu_backtrace() out of the arch-provided 37 * base function. Return whether such support was available, 38 * to allow calling code to fall back to some other mechanism: 39 */ 40#ifdef arch_trigger_all_cpu_backtrace 41static inline bool trigger_all_cpu_backtrace(void) 42{ 43 arch_trigger_all_cpu_backtrace(true); 44 45 return true; 46} 47static inline bool trigger_allbutself_cpu_backtrace(void) 48{ 49 arch_trigger_all_cpu_backtrace(false); 50 return true; 51} 52#else 53static inline bool trigger_all_cpu_backtrace(void) 54{ 55 return false; 56} 57static inline bool trigger_allbutself_cpu_backtrace(void) 58{ 59 return false; 60} 61#endif 62 63#ifdef CONFIG_LOCKUP_DETECTOR 64int hw_nmi_is_cpu_stuck(struct pt_regs *); 65u64 hw_nmi_get_sample_period(int watchdog_thresh); 66extern int nmi_watchdog_enabled; 67extern int soft_watchdog_enabled; 68extern int watchdog_user_enabled; 69extern int watchdog_thresh; 70extern int sysctl_softlockup_all_cpu_backtrace; 71struct ctl_table; 72extern int proc_watchdog(struct ctl_table *, int , 73 void __user *, size_t *, loff_t *); 74extern int proc_nmi_watchdog(struct ctl_table *, int , 75 void __user *, size_t *, loff_t *); 76extern int proc_soft_watchdog(struct ctl_table *, int , 77 void __user *, size_t *, loff_t *); 78extern int proc_watchdog_thresh(struct ctl_table *, int , 79 void __user *, size_t *, loff_t *); 80#endif 81 82#ifdef CONFIG_HAVE_ACPI_APEI_NMI 83#include <asm/nmi.h> 84#endif 85 86#endif 87