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gerrit-public.fairphone.software / kernel / msm-4.9 / ec6a90661a0d6ce1461d05c7a58a0a151154e14a / . / include / linux / nmi.h
blob: a91adf6e02f2a7c47117093eea682c06651034b8 [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);
Ulrich Obergfell6e7458a2014-10-13 15:55:35 -0700[diff] [blame]29#else
Guenter Roeckaacfbe62015-09-04 15:45:12 -0700[diff] [blame]30static inline void hardlockup_detector_disable(void) {}
Ulrich Obergfell6e7458a2014-10-13 15:55:35 -0700[diff] [blame]31#endif
32
Ingo Molnar47cab6a2009-08-03 09:31:54 +0200[diff] [blame]33/*
34 * Create trigger_all_cpu_backtrace() out of the arch-provided
35 * base function. Return whether such support was available,
36 * to allow calling code to fall back to some other mechanism:
37 */
38#ifdef arch_trigger_all_cpu_backtrace
39static inline bool trigger_all_cpu_backtrace(void)
40{
Aaron Tomlinf3aca3d2014-06-23 13:22:05 -0700[diff] [blame]41 arch_trigger_all_cpu_backtrace(true);
Ingo Molnar47cab6a2009-08-03 09:31:54 +0200[diff] [blame]42
43 return true;
44}
Aaron Tomlinf3aca3d2014-06-23 13:22:05 -0700[diff] [blame]45static inline bool trigger_allbutself_cpu_backtrace(void)
46{
47 arch_trigger_all_cpu_backtrace(false);
48 return true;
49}
Ingo Molnar47cab6a2009-08-03 09:31:54 +0200[diff] [blame]50#else
51static inline bool trigger_all_cpu_backtrace(void)
52{
53 return false;
54}
Aaron Tomlinf3aca3d2014-06-23 13:22:05 -0700[diff] [blame]55static inline bool trigger_allbutself_cpu_backtrace(void)
56{
57 return false;
58}
Andrew Mortonbb81a092006-12-07 02:14:01 +0100[diff] [blame]59#endif
60
Don Zickus58687ac2010-05-07 17:11:44 -0400[diff] [blame]61#ifdef CONFIG_LOCKUP_DETECTOR
Don Zickus84e478c2010-02-05 21:47:05 -0500[diff] [blame]62int hw_nmi_is_cpu_stuck(struct pt_regs *);
Mandeep Singh Baines4eec42f2011-05-22 22:10:23 -0700[diff] [blame]63u64 hw_nmi_get_sample_period(int watchdog_thresh);
Ulrich Obergfell84d56e62015-04-14 15:43:55 -0700[diff] [blame]64extern int nmi_watchdog_enabled;
65extern int soft_watchdog_enabled;
Frederic Weisbecker3c00ea82013-05-19 20:45:15 +0200[diff] [blame]66extern int watchdog_user_enabled;
Mandeep Singh Baines586692a2011-05-22 22:10:22 -0700[diff] [blame]67extern int watchdog_thresh;
Chris Metcalffe4ba3c2015-06-24 16:55:45 -0700[diff] [blame]68extern unsigned long *watchdog_cpumask_bits;
Aaron Tomlined235872014-06-23 13:22:05 -0700[diff] [blame]69extern int sysctl_softlockup_all_cpu_backtrace;
Don Zickus504d7cf2010-02-12 17:19:19 -0500[diff] [blame]70struct ctl_table;
Ulrich Obergfell83a80a32015-04-14 15:44:08 -0700[diff] [blame]71extern int proc_watchdog(struct ctl_table *, int ,
72 void __user *, size_t *, loff_t *);
73extern int proc_nmi_watchdog(struct ctl_table *, int ,
74 void __user *, size_t *, loff_t *);
75extern int proc_soft_watchdog(struct ctl_table *, int ,
76 void __user *, size_t *, loff_t *);
77extern int proc_watchdog_thresh(struct ctl_table *, int ,
78 void __user *, size_t *, loff_t *);
Chris Metcalffe4ba3c2015-06-24 16:55:45 -0700[diff] [blame]79extern int proc_watchdog_cpumask(struct ctl_table *, int,
80 void __user *, size_t *, loff_t *);
Ulrich Obergfellec6a9062015-09-04 15:45:28 -0700[diff] [blame^]81extern int lockup_detector_suspend(void);
82extern void lockup_detector_resume(void);
Ulrich Obergfell999bbe42015-09-04 15:45:25 -0700[diff] [blame]83#else
Ulrich Obergfellec6a9062015-09-04 15:45:28 -0700[diff] [blame^]84static inline int lockup_detector_suspend(void)
Ulrich Obergfell999bbe42015-09-04 15:45:25 -0700[diff] [blame]85{
86 return 0;
87}
88
Ulrich Obergfellec6a9062015-09-04 15:45:28 -0700[diff] [blame^]89static inline void lockup_detector_resume(void)
Ulrich Obergfell999bbe42015-09-04 15:45:25 -0700[diff] [blame]90{
91}
Don Zickus84e478c2010-02-05 21:47:05 -0500[diff] [blame]92#endif
93
Tomasz Nowicki44a69f62014-07-22 11:20:12 +0200[diff] [blame]94#ifdef CONFIG_HAVE_ACPI_APEI_NMI
95#include <asm/nmi.h>
96#endif
97
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]98#endif