| /* |
| * linux/include/linux/nmi.h |
| */ |
| #ifndef LINUX_NMI_H |
| #define LINUX_NMI_H |
| |
| #include <linux/sched.h> |
| #include <asm/irq.h> |
| |
| /** |
| * touch_nmi_watchdog - restart NMI watchdog timeout. |
| * |
| * If the architecture supports the NMI watchdog, touch_nmi_watchdog() |
| * may be used to reset the timeout - for code which intentionally |
| * disables interrupts for a long time. This call is stateless. |
| */ |
| #if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR_NMI) |
| #include <asm/nmi.h> |
| #endif |
| |
| #if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR) |
| extern void touch_nmi_watchdog(void); |
| #else |
| static inline void touch_nmi_watchdog(void) |
| { |
| touch_softlockup_watchdog(); |
| } |
| #endif |
| |
| #if defined(CONFIG_HARDLOCKUP_DETECTOR) |
| extern void hardlockup_detector_disable(void); |
| #else |
| static inline void hardlockup_detector_disable(void) {} |
| #endif |
| |
| /* |
| * Create trigger_all_cpu_backtrace() out of the arch-provided |
| * base function. Return whether such support was available, |
| * to allow calling code to fall back to some other mechanism: |
| */ |
| #ifdef arch_trigger_all_cpu_backtrace |
| static inline bool trigger_all_cpu_backtrace(void) |
| { |
| arch_trigger_all_cpu_backtrace(true); |
| |
| return true; |
| } |
| static inline bool trigger_allbutself_cpu_backtrace(void) |
| { |
| arch_trigger_all_cpu_backtrace(false); |
| return true; |
| } |
| |
| /* generic implementation */ |
| void nmi_trigger_all_cpu_backtrace(bool include_self, |
| void (*raise)(cpumask_t *mask)); |
| bool nmi_cpu_backtrace(struct pt_regs *regs); |
| |
| #else |
| static inline bool trigger_all_cpu_backtrace(void) |
| { |
| return false; |
| } |
| static inline bool trigger_allbutself_cpu_backtrace(void) |
| { |
| return false; |
| } |
| #endif |
| |
| #ifdef CONFIG_LOCKUP_DETECTOR |
| int hw_nmi_is_cpu_stuck(struct pt_regs *); |
| u64 hw_nmi_get_sample_period(int watchdog_thresh); |
| extern int nmi_watchdog_enabled; |
| extern int soft_watchdog_enabled; |
| extern int watchdog_user_enabled; |
| extern int watchdog_thresh; |
| extern unsigned long *watchdog_cpumask_bits; |
| extern int sysctl_softlockup_all_cpu_backtrace; |
| extern int sysctl_hardlockup_all_cpu_backtrace; |
| struct ctl_table; |
| extern int proc_watchdog(struct ctl_table *, int , |
| void __user *, size_t *, loff_t *); |
| extern int proc_nmi_watchdog(struct ctl_table *, int , |
| void __user *, size_t *, loff_t *); |
| extern int proc_soft_watchdog(struct ctl_table *, int , |
| void __user *, size_t *, loff_t *); |
| extern int proc_watchdog_thresh(struct ctl_table *, int , |
| void __user *, size_t *, loff_t *); |
| extern int proc_watchdog_cpumask(struct ctl_table *, int, |
| void __user *, size_t *, loff_t *); |
| extern int lockup_detector_suspend(void); |
| extern void lockup_detector_resume(void); |
| #else |
| static inline int lockup_detector_suspend(void) |
| { |
| return 0; |
| } |
| |
| static inline void lockup_detector_resume(void) |
| { |
| } |
| #endif |
| |
| #ifdef CONFIG_HAVE_ACPI_APEI_NMI |
| #include <asm/nmi.h> |
| #endif |
| |
| #endif |