| 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(ARCH_HAS_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();
|
| 36 |
|
| 37 | return true;
|
| 38 | }
|
| 39 | #else
|
| 40 | static inline bool trigger_all_cpu_backtrace(void)
|
| 41 | {
|
| 42 | return false;
|
| 43 | }
|
| 44 | #endif
|
| 45 |
|
| 46 | #ifdef CONFIG_LOCKUP_DETECTOR
|
| 47 | int hw_nmi_is_cpu_stuck(struct pt_regs *);
|
| 48 | u64 hw_nmi_get_sample_period(void);
|
| 49 | extern int watchdog_enabled;
|
| 50 | struct ctl_table;
|
| 51 | extern int proc_dowatchdog_enabled(struct ctl_table *, int ,
|
| 52 | void __user *, size_t *, loff_t *);
|
| 53 | #endif
|
| 54 |
|
| 55 | #endif
|