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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/include/linux/nmi.h | |
3 | */ | |
4 | #ifndef LINUX_NMI_H | |
5 | #define LINUX_NMI_H | |
6 | ||
9938406a | 7 | #include <linux/sched.h> |
1da177e4 LT |
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 | */ | |
d314d74c | 17 | #if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR) |
bb81a09e | 18 | #include <asm/nmi.h> |
96a84c20 DZ |
19 | extern void touch_nmi_watchdog(void); |
20 | #else | |
5d0e600d IM |
21 | static inline void touch_nmi_watchdog(void) |
22 | { | |
23 | touch_softlockup_watchdog(); | |
24 | } | |
96a84c20 | 25 | #endif |
1da177e4 | 26 | |
6e7458a6 | 27 | #if defined(CONFIG_HARDLOCKUP_DETECTOR) |
692297d8 | 28 | extern void hardlockup_detector_disable(void); |
6e7458a6 | 29 | #else |
aacfbe6a | 30 | static inline void hardlockup_detector_disable(void) {} |
6e7458a6 UO |
31 | #endif |
32 | ||
47cab6a7 IM |
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 | |
39 | static inline bool trigger_all_cpu_backtrace(void) | |
40 | { | |
f3aca3d0 | 41 | arch_trigger_all_cpu_backtrace(true); |
47cab6a7 IM |
42 | |
43 | return true; | |
44 | } | |
f3aca3d0 AT |
45 | static inline bool trigger_allbutself_cpu_backtrace(void) |
46 | { | |
47 | arch_trigger_all_cpu_backtrace(false); | |
48 | return true; | |
49 | } | |
b2c0b2cb RK |
50 | |
51 | /* generic implementation */ | |
52 | void nmi_trigger_all_cpu_backtrace(bool include_self, | |
53 | void (*raise)(cpumask_t *mask)); | |
54 | bool nmi_cpu_backtrace(struct pt_regs *regs); | |
55 | ||
47cab6a7 IM |
56 | #else |
57 | static inline bool trigger_all_cpu_backtrace(void) | |
58 | { | |
59 | return false; | |
60 | } | |
f3aca3d0 AT |
61 | static inline bool trigger_allbutself_cpu_backtrace(void) |
62 | { | |
63 | return false; | |
64 | } | |
bb81a09e AM |
65 | #endif |
66 | ||
58687acb | 67 | #ifdef CONFIG_LOCKUP_DETECTOR |
84e478c6 | 68 | int hw_nmi_is_cpu_stuck(struct pt_regs *); |
4eec42f3 | 69 | u64 hw_nmi_get_sample_period(int watchdog_thresh); |
84d56e66 UO |
70 | extern int nmi_watchdog_enabled; |
71 | extern int soft_watchdog_enabled; | |
3c00ea82 | 72 | extern int watchdog_user_enabled; |
586692a5 | 73 | extern int watchdog_thresh; |
fe4ba3c3 | 74 | extern unsigned long *watchdog_cpumask_bits; |
ed235875 | 75 | extern int sysctl_softlockup_all_cpu_backtrace; |
55537871 | 76 | extern int sysctl_hardlockup_all_cpu_backtrace; |
504d7cf1 | 77 | struct ctl_table; |
83a80a39 UO |
78 | extern int proc_watchdog(struct ctl_table *, int , |
79 | void __user *, size_t *, loff_t *); | |
80 | extern int proc_nmi_watchdog(struct ctl_table *, int , | |
81 | void __user *, size_t *, loff_t *); | |
82 | extern int proc_soft_watchdog(struct ctl_table *, int , | |
83 | void __user *, size_t *, loff_t *); | |
84 | extern int proc_watchdog_thresh(struct ctl_table *, int , | |
85 | void __user *, size_t *, loff_t *); | |
fe4ba3c3 CM |
86 | extern int proc_watchdog_cpumask(struct ctl_table *, int, |
87 | void __user *, size_t *, loff_t *); | |
ec6a9066 UO |
88 | extern int lockup_detector_suspend(void); |
89 | extern void lockup_detector_resume(void); | |
999bbe49 | 90 | #else |
ec6a9066 | 91 | static inline int lockup_detector_suspend(void) |
999bbe49 UO |
92 | { |
93 | return 0; | |
94 | } | |
95 | ||
ec6a9066 | 96 | static inline void lockup_detector_resume(void) |
999bbe49 UO |
97 | { |
98 | } | |
84e478c6 DZ |
99 | #endif |
100 | ||
44a69f61 TN |
101 | #ifdef CONFIG_HAVE_ACPI_APEI_NMI |
102 | #include <asm/nmi.h> | |
103 | #endif | |
104 | ||
1da177e4 | 105 | #endif |