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gerrit-public.fairphone.software / kernel / msm-4.9 / 4646968b94bdf88ae3c507c347d03acd5798939d / . / include / linux / nmi.h
blob: 4630eeae18e08df43be6567ca5fbcb2027643c65 [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}
Russell Kingb2c0b2c2014-09-03 23:57:13 +0100[diff] [blame]50
51/* generic implementation */
52void nmi_trigger_all_cpu_backtrace(bool include_self,
53 void (*raise)(cpumask_t *mask));
54bool nmi_cpu_backtrace(struct pt_regs *regs);
55
Ingo Molnar47cab6a2009-08-03 09:31:54 +0200[diff] [blame]56#else
57static inline bool trigger_all_cpu_backtrace(void)
58{
59 return false;
60}
Aaron Tomlinf3aca3d2014-06-23 13:22:05 -0700[diff] [blame]61static inline bool trigger_allbutself_cpu_backtrace(void)
62{
63 return false;
64}
Andrew Mortonbb81a092006-12-07 02:14:01 +0100[diff] [blame]65#endif
66
Don Zickus58687ac2010-05-07 17:11:44 -0400[diff] [blame]67#ifdef CONFIG_LOCKUP_DETECTOR
Mandeep Singh Baines4eec42f2011-05-22 22:10:23 -0700[diff] [blame]68u64 hw_nmi_get_sample_period(int watchdog_thresh);
Ulrich Obergfell84d56e62015-04-14 15:43:55 -0700[diff] [blame]69extern int nmi_watchdog_enabled;
70extern int soft_watchdog_enabled;
Frederic Weisbecker3c00ea82013-05-19 20:45:15 +0200[diff] [blame]71extern int watchdog_user_enabled;
Mandeep Singh Baines586692a2011-05-22 22:10:22 -0700[diff] [blame]72extern int watchdog_thresh;
Chris Metcalffe4ba3c2015-06-24 16:55:45 -0700[diff] [blame]73extern unsigned long *watchdog_cpumask_bits;
Aaron Tomlined235872014-06-23 13:22:05 -0700[diff] [blame]74extern int sysctl_softlockup_all_cpu_backtrace;
Jiri Kosina55537872015-11-05 18:44:41 -0800[diff] [blame]75extern int sysctl_hardlockup_all_cpu_backtrace;
Don Zickus504d7cf2010-02-12 17:19:19 -0500[diff] [blame]76struct ctl_table;
Ulrich Obergfell83a80a32015-04-14 15:44:08 -0700[diff] [blame]77extern int proc_watchdog(struct ctl_table *, int ,
78 void __user *, size_t *, loff_t *);
79extern int proc_nmi_watchdog(struct ctl_table *, int ,
80 void __user *, size_t *, loff_t *);
81extern int proc_soft_watchdog(struct ctl_table *, int ,
82 void __user *, size_t *, loff_t *);
83extern int proc_watchdog_thresh(struct ctl_table *, int ,
84 void __user *, size_t *, loff_t *);
Chris Metcalffe4ba3c2015-06-24 16:55:45 -0700[diff] [blame]85extern int proc_watchdog_cpumask(struct ctl_table *, int,
86 void __user *, size_t *, loff_t *);
Ulrich Obergfellec6a9062015-09-04 15:45:28 -0700[diff] [blame]87extern int lockup_detector_suspend(void);
88extern void lockup_detector_resume(void);
Ulrich Obergfell999bbe42015-09-04 15:45:25 -0700[diff] [blame]89#else
Ulrich Obergfellec6a9062015-09-04 15:45:28 -0700[diff] [blame]90static inline int lockup_detector_suspend(void)
Ulrich Obergfell999bbe42015-09-04 15:45:25 -0700[diff] [blame]91{
92 return 0;
93}
94
Ulrich Obergfellec6a9062015-09-04 15:45:28 -0700[diff] [blame]95static inline void lockup_detector_resume(void)
Ulrich Obergfell999bbe42015-09-04 15:45:25 -0700[diff] [blame]96{
97}
Don Zickus84e478c2010-02-05 21:47:05 -0500[diff] [blame]98#endif
99
Tomasz Nowicki44a69f62014-07-22 11:20:12 +0200[diff] [blame]100#ifdef CONFIG_HAVE_ACPI_APEI_NMI
101#include <asm/nmi.h>
102#endif
103
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]104#endif