Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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 watchdog_enable_hardlockup_detector(bool val);
29extern bool watchdog_hardlockup_detector_is_enabled(void);
30#else
31static inline void watchdog_enable_hardlockup_detector(bool val)
32{
33}
34static inline bool watchdog_hardlockup_detector_is_enabled(void)
35{
36 return true;
37}
38#endif
39
40/*
41 * Create trigger_all_cpu_backtrace() out of the arch-provided
42 * base function. Return whether such support was available,
43 * to allow calling code to fall back to some other mechanism:
44 */
45#ifdef arch_trigger_all_cpu_backtrace
46static inline bool trigger_all_cpu_backtrace(void)
47{
48 arch_trigger_all_cpu_backtrace(true);
49
50 return true;
51}
52static inline bool trigger_allbutself_cpu_backtrace(void)
53{
54 arch_trigger_all_cpu_backtrace(false);
55 return true;
56}
57#else
58static inline bool trigger_all_cpu_backtrace(void)
59{
60 return false;
61}
62static inline bool trigger_allbutself_cpu_backtrace(void)
63{
64 return false;
65}
66#endif
67
68#ifdef CONFIG_LOCKUP_DETECTOR
69int hw_nmi_is_cpu_stuck(struct pt_regs *);
70u64 hw_nmi_get_sample_period(int watchdog_thresh);
71extern int watchdog_user_enabled;
72extern int watchdog_thresh;
73extern int sysctl_softlockup_all_cpu_backtrace;
74struct ctl_table;
75extern int proc_dowatchdog(struct ctl_table *, int ,
76 void __user *, size_t *, loff_t *);
77#endif
78
79#ifdef CONFIG_HAVE_ACPI_APEI_NMI
80#include <asm/nmi.h>
81#endif
82
83#endif