3adbbcce9a
This patch cleans up the NMI interrupt path. Instead of being gated by if the 'nmi callback' is set, the interrupt handler now calls everyone who is registered on the die_chain and additionally checks the nmi watchdog, reseting it if enabled. This allows more subsystems to hook into the NMI if they need to (without being block by set_nmi_callback). Signed-off-by: Don Zickus <dzickus@redhat.com> Signed-off-by: Andi Kleen <ak@suse.de>
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
/*
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* linux/include/asm-i386/nmi.h
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*/
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#ifndef ASM_NMI_H
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#define ASM_NMI_H
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#include <linux/pm.h>
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#include <asm/io.h>
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struct pt_regs;
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typedef int (*nmi_callback_t)(struct pt_regs * regs, int cpu);
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/**
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* set_nmi_callback
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*
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* Set a handler for an NMI. Only one handler may be
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* set. Return 1 if the NMI was handled.
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*/
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void set_nmi_callback(nmi_callback_t callback);
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/**
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* unset_nmi_callback
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*
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* Remove the handler previously set.
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*/
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void unset_nmi_callback(void);
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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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extern void default_do_nmi(struct pt_regs *);
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extern void die_nmi(char *str, struct pt_regs *regs);
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#define get_nmi_reason() inb(0x61)
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extern int panic_on_timeout;
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extern int unknown_nmi_panic;
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extern int check_nmi_watchdog(void);
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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 int reserve_lapic_nmi(void);
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extern void release_lapic_nmi(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 void nmi_watchdog_default(void);
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extern int setup_nmi_watchdog(char *);
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extern atomic_t nmi_active;
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extern unsigned int nmi_watchdog;
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#define NMI_DEFAULT -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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#endif /* ASM_NMI_H */
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