Linus Torvalds | 1da177e | 2005-04-16 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 Schmidt | 9938406 | 2006-09-29 01:59:03 -0700 | [diff] [blame] | 7 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 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 Wang | d314d74 | 2012-03-23 15:01:51 -0700 | [diff] [blame] | 17 | #if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR) |
Andrew Morton | bb81a09 | 2006-12-07 02:14:01 +0100 | [diff] [blame] | 18 | #include <asm/nmi.h> |
Don Zickus | 96a84c2 | 2010-11-29 17:07:16 -0500 | [diff] [blame] | 19 | extern void touch_nmi_watchdog(void); |
| 20 | #else |
Ingo Molnar | 5d0e600 | 2007-02-13 13:26:24 +0100 | [diff] [blame] | 21 | static inline void touch_nmi_watchdog(void) |
| 22 | { |
| 23 | touch_softlockup_watchdog(); |
| 24 | } |
Don Zickus | 96a84c2 | 2010-11-29 17:07:16 -0500 | [diff] [blame] | 25 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
Ulrich Obergfell | 6e7458a | 2014-10-13 15:55:35 -0700 | [diff] [blame] | 27 | #if defined(CONFIG_HARDLOCKUP_DETECTOR) |
Ulrich Obergfell | 692297d | 2015-04-14 15:44:19 -0700 | [diff] [blame] | 28 | extern void hardlockup_detector_disable(void); |
Ulrich Obergfell | 6e7458a | 2014-10-13 15:55:35 -0700 | [diff] [blame] | 29 | #else |
Ulrich Obergfell | 692297d | 2015-04-14 15:44:19 -0700 | [diff] [blame] | 30 | static inline void hardlockup_detector_disable(void) |
Ulrich Obergfell | 6e7458a | 2014-10-13 15:55:35 -0700 | [diff] [blame] | 31 | { |
| 32 | } |
Ulrich Obergfell | 6e7458a | 2014-10-13 15:55:35 -0700 | [diff] [blame] | 33 | #endif |
| 34 | |
Ingo Molnar | 47cab6a | 2009-08-03 09:31:54 +0200 | [diff] [blame] | 35 | /* |
| 36 | * Create trigger_all_cpu_backtrace() out of the arch-provided |
| 37 | * base function. Return whether such support was available, |
| 38 | * to allow calling code to fall back to some other mechanism: |
| 39 | */ |
| 40 | #ifdef arch_trigger_all_cpu_backtrace |
| 41 | static inline bool trigger_all_cpu_backtrace(void) |
| 42 | { |
Aaron Tomlin | f3aca3d | 2014-06-23 13:22:05 -0700 | [diff] [blame] | 43 | arch_trigger_all_cpu_backtrace(true); |
Ingo Molnar | 47cab6a | 2009-08-03 09:31:54 +0200 | [diff] [blame] | 44 | |
| 45 | return true; |
| 46 | } |
Aaron Tomlin | f3aca3d | 2014-06-23 13:22:05 -0700 | [diff] [blame] | 47 | static inline bool trigger_allbutself_cpu_backtrace(void) |
| 48 | { |
| 49 | arch_trigger_all_cpu_backtrace(false); |
| 50 | return true; |
| 51 | } |
Ingo Molnar | 47cab6a | 2009-08-03 09:31:54 +0200 | [diff] [blame] | 52 | #else |
| 53 | static inline bool trigger_all_cpu_backtrace(void) |
| 54 | { |
| 55 | return false; |
| 56 | } |
Aaron Tomlin | f3aca3d | 2014-06-23 13:22:05 -0700 | [diff] [blame] | 57 | static inline bool trigger_allbutself_cpu_backtrace(void) |
| 58 | { |
| 59 | return false; |
| 60 | } |
Andrew Morton | bb81a09 | 2006-12-07 02:14:01 +0100 | [diff] [blame] | 61 | #endif |
| 62 | |
Don Zickus | 58687ac | 2010-05-07 17:11:44 -0400 | [diff] [blame] | 63 | #ifdef CONFIG_LOCKUP_DETECTOR |
Don Zickus | 84e478c | 2010-02-05 21:47:05 -0500 | [diff] [blame] | 64 | int hw_nmi_is_cpu_stuck(struct pt_regs *); |
Mandeep Singh Baines | 4eec42f | 2011-05-22 22:10:23 -0700 | [diff] [blame] | 65 | u64 hw_nmi_get_sample_period(int watchdog_thresh); |
Ulrich Obergfell | 84d56e6 | 2015-04-14 15:43:55 -0700 | [diff] [blame] | 66 | extern int nmi_watchdog_enabled; |
| 67 | extern int soft_watchdog_enabled; |
Frederic Weisbecker | 3c00ea8 | 2013-05-19 20:45:15 +0200 | [diff] [blame] | 68 | extern int watchdog_user_enabled; |
Mandeep Singh Baines | 586692a | 2011-05-22 22:10:22 -0700 | [diff] [blame] | 69 | extern int watchdog_thresh; |
Chris Metcalf | fe4ba3c | 2015-06-24 16:55:45 -0700 | [diff] [blame] | 70 | extern unsigned long *watchdog_cpumask_bits; |
Aaron Tomlin | ed23587 | 2014-06-23 13:22:05 -0700 | [diff] [blame] | 71 | extern int sysctl_softlockup_all_cpu_backtrace; |
Don Zickus | 504d7cf | 2010-02-12 17:19:19 -0500 | [diff] [blame] | 72 | struct ctl_table; |
Ulrich Obergfell | 83a80a3 | 2015-04-14 15:44:08 -0700 | [diff] [blame] | 73 | extern int proc_watchdog(struct ctl_table *, int , |
| 74 | void __user *, size_t *, loff_t *); |
| 75 | extern int proc_nmi_watchdog(struct ctl_table *, int , |
| 76 | void __user *, size_t *, loff_t *); |
| 77 | extern int proc_soft_watchdog(struct ctl_table *, int , |
| 78 | void __user *, size_t *, loff_t *); |
| 79 | extern int proc_watchdog_thresh(struct ctl_table *, int , |
| 80 | void __user *, size_t *, loff_t *); |
Chris Metcalf | fe4ba3c | 2015-06-24 16:55:45 -0700 | [diff] [blame] | 81 | extern int proc_watchdog_cpumask(struct ctl_table *, int, |
| 82 | void __user *, size_t *, loff_t *); |
Don Zickus | 84e478c | 2010-02-05 21:47:05 -0500 | [diff] [blame] | 83 | #endif |
| 84 | |
Tomasz Nowicki | 44a69f6 | 2014-07-22 11:20:12 +0200 | [diff] [blame] | 85 | #ifdef CONFIG_HAVE_ACPI_APEI_NMI |
| 86 | #include <asm/nmi.h> |
| 87 | #endif |
| 88 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | #endif |