186 lines
4.2 KiB
C
186 lines
4.2 KiB
C
/*
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* linux/include/linux/nmi.h
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*/
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#ifndef LINUX_NMI_H
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#define LINUX_NMI_H
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#include <linux/sched.h>
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#include <asm/irq.h>
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/**
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* touch_nmi_watchdog - restart NMI watchdog timeout.
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*
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* If the architecture supports the NMI watchdog, touch_nmi_watchdog()
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* may be used to reset the timeout - for code which intentionally
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* disables interrupts for a long time. This call is stateless.
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*/
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#if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR_NMI)
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#include <asm/nmi.h>
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#endif
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#ifdef CONFIG_SEC_DEBUG
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#define TASK_COMM_LEN 16
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#define SOFTIRQ_TYPE_LEN 16
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enum hardlockup_type {
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HL_TASK_STUCK = 1,
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HL_IRQ_STUCK,
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HL_IDLE_STUCK,
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HL_SMC_CALL_STUCK,
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HL_IRQ_STORM,
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HL_HRTIMER_ERROR,
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HL_UNKNOWN_STUCK
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};
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struct task_info {
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char task_comm[TASK_COMM_LEN];
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};
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struct cpuidle_info {
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char *mode;
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};
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struct smc_info {
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int cmd;
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};
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struct irq_info {
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int irq;
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void *fn;
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unsigned long long avg_period;
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};
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struct hardlockup_info {
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enum hardlockup_type hl_type;
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unsigned long long delay_time;
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union {
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struct task_info task_info;
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struct cpuidle_info cpuidle_info;
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struct smc_info smc_info;
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struct irq_info irq_info;
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};
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};
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struct softirq_info {
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u64 last_arrival;
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char softirq_type[SOFTIRQ_TYPE_LEN];
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void *fn;
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};
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enum softlockup_type {
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SL_SOFTIRQ_STUCK = 1,
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SL_TASK_STUCK,
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SL_UNKNOWN_STUCK
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};
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struct softlockup_info {
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enum softlockup_type sl_type;
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unsigned long long delay_time;
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int preempt_count;
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union {
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struct softirq_info softirq_info;
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struct task_info task_info;
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};
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};
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#if defined(CONFIG_HARDLOCKUP_DETECTOR_OTHER_CPU)
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extern void update_hardlockup_type(unsigned int cpu);
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unsigned long long get_hardlockup_thresh(void);
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#endif
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unsigned long long get_ess_softlockup_thresh(void);
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extern void sl_softirq_entry(const char *, void *);
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extern void sl_softirq_exit(void);
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#else
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static inline void void sl_softirq_entry(const char *, void *) { }
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static inline void sl_softirq_exit(void) { }
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#endif
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#if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR)
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extern void touch_nmi_watchdog(void);
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#else
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static inline void touch_nmi_watchdog(void)
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{
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touch_softlockup_watchdog();
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}
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#endif
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#if defined(CONFIG_HARDLOCKUP_DETECTOR)
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extern void hardlockup_detector_disable(void);
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#else
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static inline void hardlockup_detector_disable(void) {}
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#endif
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/*
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* Create trigger_all_cpu_backtrace() out of the arch-provided
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* base function. Return whether such support was available,
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* to allow calling code to fall back to some other mechanism:
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*/
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#ifdef arch_trigger_all_cpu_backtrace
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static inline bool trigger_all_cpu_backtrace(void)
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{
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arch_trigger_all_cpu_backtrace(true);
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return true;
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}
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static inline bool trigger_allbutself_cpu_backtrace(void)
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{
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arch_trigger_all_cpu_backtrace(false);
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return true;
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}
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/* generic implementation */
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void nmi_trigger_all_cpu_backtrace(bool include_self,
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void (*raise)(cpumask_t *mask));
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bool nmi_cpu_backtrace(struct pt_regs *regs);
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#else
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static inline bool trigger_all_cpu_backtrace(void)
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{
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return false;
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}
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static inline bool trigger_allbutself_cpu_backtrace(void)
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{
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return false;
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}
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#endif
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#ifdef CONFIG_LOCKUP_DETECTOR
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int hw_nmi_is_cpu_stuck(struct pt_regs *);
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u64 hw_nmi_get_sample_period(int watchdog_thresh);
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extern int nmi_watchdog_enabled;
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extern int soft_watchdog_enabled;
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extern int watchdog_user_enabled;
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extern int watchdog_thresh;
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extern unsigned long *watchdog_cpumask_bits;
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extern int sysctl_softlockup_all_cpu_backtrace;
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extern int sysctl_hardlockup_all_cpu_backtrace;
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struct ctl_table;
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extern int proc_watchdog(struct ctl_table *, int ,
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void __user *, size_t *, loff_t *);
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extern int proc_nmi_watchdog(struct ctl_table *, int ,
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void __user *, size_t *, loff_t *);
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extern int proc_soft_watchdog(struct ctl_table *, int ,
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void __user *, size_t *, loff_t *);
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extern int proc_watchdog_thresh(struct ctl_table *, int ,
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void __user *, size_t *, loff_t *);
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extern int proc_watchdog_cpumask(struct ctl_table *, int,
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void __user *, size_t *, loff_t *);
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extern int lockup_detector_suspend(void);
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extern void lockup_detector_resume(void);
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#else
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static inline int lockup_detector_suspend(void)
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{
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return 0;
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}
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static inline void lockup_detector_resume(void)
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{
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}
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#endif
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#ifdef CONFIG_HAVE_ACPI_APEI_NMI
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#include <asm/nmi.h>
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#endif
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#endif
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