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gerrit-public.fairphone.software / kernel / msm-4.9 / aacfbe6a9724bb6d66a656a5abcc681d5649ed92 / . / include / linux / nmi.h
blob: 088714537d1033416eac88ae2ec52a13e32c0d27 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
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 -0700[diff] [blame]7#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]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 */
Cong Wangd314d742012-03-23 15:01:51 -0700[diff] [blame]17#if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR)
Andrew Mortonbb81a092006-12-07 02:14:01 +0100[diff] [blame]18#include <asm/nmi.h>
Don Zickus96a84c22010-11-29 17:07:16 -0500[diff] [blame]19extern void touch_nmi_watchdog(void);
20#else
Ingo Molnar5d0e6002007-02-13 13:26:24 +0100[diff] [blame]21static inline void touch_nmi_watchdog(void)
22{
23 touch_softlockup_watchdog();
24}
Don Zickus96a84c22010-11-29 17:07:16 -0500[diff] [blame]25#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]26
Ulrich Obergfell6e7458a2014-10-13 15:55:35 -0700[diff] [blame]27#if defined(CONFIG_HARDLOCKUP_DETECTOR)
Ulrich Obergfell692297d2015-04-14 15:44:19 -0700[diff] [blame]28extern void hardlockup_detector_disable(void);
Guenter Roeckaacfbe62015-09-04 15:45:12 -0700[diff] [blame^]29void watchdog_nmi_disable_all(void);
30void watchdog_nmi_enable_all(void);
Ulrich Obergfell6e7458a2014-10-13 15:55:35 -0700[diff] [blame]31#else
Guenter Roeckaacfbe62015-09-04 15:45:12 -0700[diff] [blame^]32static inline void hardlockup_detector_disable(void) {}
33static inline void watchdog_nmi_disable_all(void) {}
34static inline void watchdog_nmi_enable_all(void) {}
Ulrich Obergfell6e7458a2014-10-13 15:55:35 -0700[diff] [blame]35#endif
36
Ingo Molnar47cab6a2009-08-03 09:31:54 +0200[diff] [blame]37/*
38 * Create trigger_all_cpu_backtrace() out of the arch-provided
39 * base function. Return whether such support was available,
40 * to allow calling code to fall back to some other mechanism:
41 */
42#ifdef arch_trigger_all_cpu_backtrace
43static inline bool trigger_all_cpu_backtrace(void)
44{
Aaron Tomlinf3aca3d2014-06-23 13:22:05 -0700[diff] [blame]45 arch_trigger_all_cpu_backtrace(true);
Ingo Molnar47cab6a2009-08-03 09:31:54 +0200[diff] [blame]46
47 return true;
48}
Aaron Tomlinf3aca3d2014-06-23 13:22:05 -0700[diff] [blame]49static inline bool trigger_allbutself_cpu_backtrace(void)
50{
51 arch_trigger_all_cpu_backtrace(false);
52 return true;
53}
Ingo Molnar47cab6a2009-08-03 09:31:54 +0200[diff] [blame]54#else
55static inline bool trigger_all_cpu_backtrace(void)
56{
57 return false;
58}
Aaron Tomlinf3aca3d2014-06-23 13:22:05 -0700[diff] [blame]59static inline bool trigger_allbutself_cpu_backtrace(void)
60{
61 return false;
62}
Andrew Mortonbb81a092006-12-07 02:14:01 +0100[diff] [blame]63#endif
64
Don Zickus58687ac2010-05-07 17:11:44 -0400[diff] [blame]65#ifdef CONFIG_LOCKUP_DETECTOR
Don Zickus84e478c2010-02-05 21:47:05 -0500[diff] [blame]66int hw_nmi_is_cpu_stuck(struct pt_regs *);
Mandeep Singh Baines4eec42f2011-05-22 22:10:23 -0700[diff] [blame]67u64 hw_nmi_get_sample_period(int watchdog_thresh);
Ulrich Obergfell84d56e62015-04-14 15:43:55 -0700[diff] [blame]68extern int nmi_watchdog_enabled;
69extern int soft_watchdog_enabled;
Frederic Weisbecker3c00ea82013-05-19 20:45:15 +0200[diff] [blame]70extern int watchdog_user_enabled;
Mandeep Singh Baines586692a2011-05-22 22:10:22 -0700[diff] [blame]71extern int watchdog_thresh;
Chris Metcalffe4ba3c2015-06-24 16:55:45 -0700[diff] [blame]72extern unsigned long *watchdog_cpumask_bits;
Aaron Tomlined235872014-06-23 13:22:05 -0700[diff] [blame]73extern int sysctl_softlockup_all_cpu_backtrace;
Don Zickus504d7cf2010-02-12 17:19:19 -0500[diff] [blame]74struct ctl_table;
Ulrich Obergfell83a80a32015-04-14 15:44:08 -0700[diff] [blame]75extern int proc_watchdog(struct ctl_table *, int ,
76 void __user *, size_t *, loff_t *);
77extern int proc_nmi_watchdog(struct ctl_table *, int ,
78 void __user *, size_t *, loff_t *);
79extern int proc_soft_watchdog(struct ctl_table *, int ,
80 void __user *, size_t *, loff_t *);
81extern int proc_watchdog_thresh(struct ctl_table *, int ,
82 void __user *, size_t *, loff_t *);
Chris Metcalffe4ba3c2015-06-24 16:55:45 -0700[diff] [blame]83extern int proc_watchdog_cpumask(struct ctl_table *, int,
84 void __user *, size_t *, loff_t *);
Don Zickus84e478c2010-02-05 21:47:05 -0500[diff] [blame]85#endif
86
Tomasz Nowicki44a69f62014-07-22 11:20:12 +0200[diff] [blame]87#ifdef CONFIG_HAVE_ACPI_APEI_NMI
88#include <asm/nmi.h>
89#endif
90
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]91#endif