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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 | */ | |
9a01c3ed | 38 | #ifdef arch_trigger_cpumask_backtrace |
47cab6a7 IM |
39 | static inline bool trigger_all_cpu_backtrace(void) |
40 | { | |
9a01c3ed | 41 | arch_trigger_cpumask_backtrace(cpu_online_mask, false); |
47cab6a7 IM |
42 | return true; |
43 | } | |
9a01c3ed | 44 | |
f3aca3d0 AT |
45 | static inline bool trigger_allbutself_cpu_backtrace(void) |
46 | { | |
9a01c3ed CM |
47 | arch_trigger_cpumask_backtrace(cpu_online_mask, true); |
48 | return true; | |
49 | } | |
50 | ||
51 | static inline bool trigger_cpumask_backtrace(struct cpumask *mask) | |
52 | { | |
53 | arch_trigger_cpumask_backtrace(mask, false); | |
54 | return true; | |
55 | } | |
56 | ||
57 | static inline bool trigger_single_cpu_backtrace(int cpu) | |
58 | { | |
59 | arch_trigger_cpumask_backtrace(cpumask_of(cpu), false); | |
f3aca3d0 AT |
60 | return true; |
61 | } | |
b2c0b2cb RK |
62 | |
63 | /* generic implementation */ | |
9a01c3ed CM |
64 | void nmi_trigger_cpumask_backtrace(const cpumask_t *mask, |
65 | bool exclude_self, | |
b2c0b2cb RK |
66 | void (*raise)(cpumask_t *mask)); |
67 | bool nmi_cpu_backtrace(struct pt_regs *regs); | |
68 | ||
47cab6a7 IM |
69 | #else |
70 | static inline bool trigger_all_cpu_backtrace(void) | |
71 | { | |
72 | return false; | |
73 | } | |
f3aca3d0 AT |
74 | static inline bool trigger_allbutself_cpu_backtrace(void) |
75 | { | |
76 | return false; | |
77 | } | |
9a01c3ed CM |
78 | static inline bool trigger_cpumask_backtrace(struct cpumask *mask) |
79 | { | |
80 | return false; | |
81 | } | |
82 | static inline bool trigger_single_cpu_backtrace(int cpu) | |
83 | { | |
84 | return false; | |
85 | } | |
bb81a09e AM |
86 | #endif |
87 | ||
58687acb | 88 | #ifdef CONFIG_LOCKUP_DETECTOR |
4eec42f3 | 89 | u64 hw_nmi_get_sample_period(int watchdog_thresh); |
84d56e66 UO |
90 | extern int nmi_watchdog_enabled; |
91 | extern int soft_watchdog_enabled; | |
3c00ea82 | 92 | extern int watchdog_user_enabled; |
586692a5 | 93 | extern int watchdog_thresh; |
fe4ba3c3 | 94 | extern unsigned long *watchdog_cpumask_bits; |
ed235875 | 95 | extern int sysctl_softlockup_all_cpu_backtrace; |
55537871 | 96 | extern int sysctl_hardlockup_all_cpu_backtrace; |
504d7cf1 | 97 | struct ctl_table; |
83a80a39 UO |
98 | extern int proc_watchdog(struct ctl_table *, int , |
99 | void __user *, size_t *, loff_t *); | |
100 | extern int proc_nmi_watchdog(struct ctl_table *, int , | |
101 | void __user *, size_t *, loff_t *); | |
102 | extern int proc_soft_watchdog(struct ctl_table *, int , | |
103 | void __user *, size_t *, loff_t *); | |
104 | extern int proc_watchdog_thresh(struct ctl_table *, int , | |
105 | void __user *, size_t *, loff_t *); | |
fe4ba3c3 CM |
106 | extern int proc_watchdog_cpumask(struct ctl_table *, int, |
107 | void __user *, size_t *, loff_t *); | |
ec6a9066 UO |
108 | extern int lockup_detector_suspend(void); |
109 | extern void lockup_detector_resume(void); | |
999bbe49 | 110 | #else |
ec6a9066 | 111 | static inline int lockup_detector_suspend(void) |
999bbe49 UO |
112 | { |
113 | return 0; | |
114 | } | |
115 | ||
ec6a9066 | 116 | static inline void lockup_detector_resume(void) |
999bbe49 UO |
117 | { |
118 | } | |
84e478c6 DZ |
119 | #endif |
120 | ||
44a69f61 TN |
121 | #ifdef CONFIG_HAVE_ACPI_APEI_NMI |
122 | #include <asm/nmi.h> | |
123 | #endif | |
124 | ||
1da177e4 | 125 | #endif |