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148b508309
A downgrade helper for the NMI watchdog to be used in all places where the I/O APIC watchdog may have been requested, but the I/O APIC is found not to be there or meant to be left disabled. This is so that the reconfiguration is cosistent and defined in a single place only. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
#ifndef _ASM_X86_NMI_H_
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#define _ASM_X86_NMI_H_
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#include <linux/pm.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#ifdef ARCH_HAS_NMI_WATCHDOG
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/**
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* do_nmi_callback
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*
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* Check to see if a callback exists and execute it. Return 1
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* if the handler exists and was handled successfully.
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*/
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int do_nmi_callback(struct pt_regs *regs, int cpu);
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#ifdef CONFIG_PM
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/** Replace the PM callback routine for NMI. */
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struct pm_dev *set_nmi_pm_callback(pm_callback callback);
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/** Unset the PM callback routine back to the default. */
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void unset_nmi_pm_callback(struct pm_dev *dev);
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#else
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static inline struct pm_dev *set_nmi_pm_callback(pm_callback callback)
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{
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return 0;
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}
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static inline void unset_nmi_pm_callback(struct pm_dev *dev)
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{
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}
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#endif /* CONFIG_PM */
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#ifdef CONFIG_X86_64
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extern void default_do_nmi(struct pt_regs *);
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extern void die_nmi(char *str, struct pt_regs *regs, int do_panic);
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extern void nmi_watchdog_default(void);
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#else
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#define nmi_watchdog_default() do {} while (0)
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#endif
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extern int check_nmi_watchdog(void);
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extern int nmi_watchdog_enabled;
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extern int unknown_nmi_panic;
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extern int avail_to_resrv_perfctr_nmi_bit(unsigned int);
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extern int avail_to_resrv_perfctr_nmi(unsigned int);
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extern int reserve_perfctr_nmi(unsigned int);
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extern void release_perfctr_nmi(unsigned int);
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extern int reserve_evntsel_nmi(unsigned int);
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extern void release_evntsel_nmi(unsigned int);
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extern void setup_apic_nmi_watchdog(void *);
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extern void stop_apic_nmi_watchdog(void *);
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extern void disable_timer_nmi_watchdog(void);
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extern void enable_timer_nmi_watchdog(void);
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extern int nmi_watchdog_tick(struct pt_regs *regs, unsigned reason);
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extern atomic_t nmi_active;
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extern unsigned int nmi_watchdog;
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#define NMI_DISABLED -1
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#define NMI_NONE 0
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#define NMI_IO_APIC 1
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#define NMI_LOCAL_APIC 2
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#define NMI_INVALID 3
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#define NMI_DEFAULT NMI_DISABLED
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struct ctl_table;
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struct file;
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extern int proc_nmi_enabled(struct ctl_table *, int , struct file *,
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void __user *, size_t *, loff_t *);
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extern int unknown_nmi_panic;
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void __trigger_all_cpu_backtrace(void);
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#define trigger_all_cpu_backtrace() __trigger_all_cpu_backtrace()
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static inline void localise_nmi_watchdog(void)
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{
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if (nmi_watchdog == NMI_IO_APIC)
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nmi_watchdog = NMI_LOCAL_APIC;
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}
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#endif
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void lapic_watchdog_stop(void);
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int lapic_watchdog_init(unsigned nmi_hz);
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int lapic_wd_event(unsigned nmi_hz);
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unsigned lapic_adjust_nmi_hz(unsigned hz);
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int lapic_watchdog_ok(void);
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void disable_lapic_nmi_watchdog(void);
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void enable_lapic_nmi_watchdog(void);
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void stop_nmi(void);
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void restart_nmi(void);
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#endif
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