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> 19 extern void touch_nmi_watchdog(void); 20 #else 21 static inline void touch_nmi_watchdog(void) 22 { 23 touch_softlockup_watchdog(); 24 } 25 #endif 26 27 /* 28 * Create trigger_all_cpu_backtrace() out of the arch-provided 29 * base function. Return whether such support was available, 30 * to allow calling code to fall back to some other mechanism: 31 */ 32 #ifdef arch_trigger_all_cpu_backtrace 33 static inline bool trigger_all_cpu_backtrace(void) 34 { 35 arch_trigger_all_cpu_backtrace(true); 36 37 return true; 38 } 39 static inline bool trigger_allbutself_cpu_backtrace(void) 40 { 41 arch_trigger_all_cpu_backtrace(false); 42 return true; 43 } 44 #else 45 static inline bool trigger_all_cpu_backtrace(void) 46 { 47 return false; 48 } 49 static inline bool trigger_allbutself_cpu_backtrace(void) 50 { 51 return false; 52 } 53 #endif 54 55 #ifdef CONFIG_LOCKUP_DETECTOR 56 int hw_nmi_is_cpu_stuck(struct pt_regs *); 57 u64 hw_nmi_get_sample_period(int watchdog_thresh); 58 extern int watchdog_user_enabled; 59 extern int watchdog_thresh; 60 extern int sysctl_softlockup_all_cpu_backtrace; 61 struct ctl_table; 62 extern int proc_dowatchdog(struct ctl_table *, int , 63 void __user *, size_t *, loff_t *); 64 #endif 65 66 #endif 67