Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
os
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/*
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(true);
36
37 return true;
38}
39static inline bool trigger_allbutself_cpu_backtrace(void)
40{
41 arch_trigger_all_cpu_backtrace(false);
42 return true;
43}
44#else
45static inline bool trigger_all_cpu_backtrace(void)
46{
47 return false;
48}
49static inline bool trigger_allbutself_cpu_backtrace(void)
50{
51 return false;
52}
53#endif
54
55#ifdef CONFIG_LOCKUP_DETECTOR
56int hw_nmi_is_cpu_stuck(struct pt_regs *);
57u64 hw_nmi_get_sample_period(int watchdog_thresh);
58extern int watchdog_user_enabled;
59extern int watchdog_thresh;
60extern int sysctl_softlockup_all_cpu_backtrace;
61struct ctl_table;
62extern int proc_dowatchdog(struct ctl_table *, int ,
63 void __user *, size_t *, loff_t *);
64#endif
65
66#endif