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TOMOYO Linux Cross Reference
Linux/include/linux/nmi.h

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  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 #if defined(CONFIG_HARDLOCKUP_DETECTOR)
 28 extern void hardlockup_detector_disable(void);
 29 #else
 30 static 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
 41 static inline bool trigger_all_cpu_backtrace(void)
 42 {
 43         arch_trigger_all_cpu_backtrace(true);
 44 
 45         return true;
 46 }
 47 static inline bool trigger_allbutself_cpu_backtrace(void)
 48 {
 49         arch_trigger_all_cpu_backtrace(false);
 50         return true;
 51 }
 52 #else
 53 static inline bool trigger_all_cpu_backtrace(void)
 54 {
 55         return false;
 56 }
 57 static inline bool trigger_allbutself_cpu_backtrace(void)
 58 {
 59         return false;
 60 }
 61 #endif
 62 
 63 #ifdef CONFIG_LOCKUP_DETECTOR
 64 int hw_nmi_is_cpu_stuck(struct pt_regs *);
 65 u64 hw_nmi_get_sample_period(int watchdog_thresh);
 66 extern int nmi_watchdog_enabled;
 67 extern int soft_watchdog_enabled;
 68 extern int watchdog_user_enabled;
 69 extern int watchdog_thresh;
 70 extern unsigned long *watchdog_cpumask_bits;
 71 extern int sysctl_softlockup_all_cpu_backtrace;
 72 struct ctl_table;
 73 extern int proc_watchdog(struct ctl_table *, int ,
 74                          void __user *, size_t *, loff_t *);
 75 extern int proc_nmi_watchdog(struct ctl_table *, int ,
 76                              void __user *, size_t *, loff_t *);
 77 extern int proc_soft_watchdog(struct ctl_table *, int ,
 78                               void __user *, size_t *, loff_t *);
 79 extern int proc_watchdog_thresh(struct ctl_table *, int ,
 80                                 void __user *, size_t *, loff_t *);
 81 extern int proc_watchdog_cpumask(struct ctl_table *, int,
 82                                  void __user *, size_t *, loff_t *);
 83 #endif
 84 
 85 #ifdef CONFIG_HAVE_ACPI_APEI_NMI
 86 #include <asm/nmi.h>
 87 #endif
 88 
 89 #endif
 90 

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