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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/include/linux/nmi.h
3 */
4#ifndef LINUX_NMI_H
5#define LINUX_NMI_H
6
Michal Schmidt99384062006-09-29 01:59:03 -07007#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#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 */
Don Zickus4a7863c2010-12-22 14:00:03 -050017#if defined(ARCH_HAS_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR)
Andrew Mortonbb81a092006-12-07 02:14:01 +010018#include <asm/nmi.h>
Don Zickus96a84c22010-11-29 17:07:16 -050019extern void touch_nmi_watchdog(void);
20#else
Ingo Molnar5d0e6002007-02-13 13:26:24 +010021static inline void touch_nmi_watchdog(void)
22{
23 touch_softlockup_watchdog();
24}
Don Zickus96a84c22010-11-29 17:07:16 -050025#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
Ingo Molnar47cab6a2009-08-03 09:31:54 +020027/*
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
33static inline bool trigger_all_cpu_backtrace(void)
34{
35 arch_trigger_all_cpu_backtrace();
36
37 return true;
38}
39#else
40static inline bool trigger_all_cpu_backtrace(void)
41{
42 return false;
43}
Andrew Mortonbb81a092006-12-07 02:14:01 +010044#endif
45
Don Zickus58687ac2010-05-07 17:11:44 -040046#ifdef CONFIG_LOCKUP_DETECTOR
Don Zickus84e478c2010-02-05 21:47:05 -050047int hw_nmi_is_cpu_stuck(struct pt_regs *);
Mandeep Singh Baines4eec42f2011-05-22 22:10:23 -070048u64 hw_nmi_get_sample_period(int watchdog_thresh);
Don Zickus58687ac2010-05-07 17:11:44 -040049extern int watchdog_enabled;
Mandeep Singh Baines586692a2011-05-22 22:10:22 -070050extern int watchdog_thresh;
Don Zickus504d7cf2010-02-12 17:19:19 -050051struct ctl_table;
Mandeep Singh Baines586692a2011-05-22 22:10:22 -070052extern int proc_dowatchdog(struct ctl_table *, int ,
53 void __user *, size_t *, loff_t *);
Don Zickus84e478c2010-02-05 21:47:05 -050054#endif
55
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#endif