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Linux kernel mirror (for testing)
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kernel
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linux
1#ifndef _ASM_X86_NMI_H
2#define _ASM_X86_NMI_H
3
4#include <linux/pm.h>
5#include <asm/irq.h>
6#include <asm/io.h>
7
8#ifdef ARCH_HAS_NMI_WATCHDOG
9
10/**
11 * do_nmi_callback
12 *
13 * Check to see if a callback exists and execute it. Return 1
14 * if the handler exists and was handled successfully.
15 */
16int do_nmi_callback(struct pt_regs *regs, int cpu);
17
18extern void die_nmi(char *str, struct pt_regs *regs, int do_panic);
19extern int check_nmi_watchdog(void);
20extern int nmi_watchdog_enabled;
21extern int avail_to_resrv_perfctr_nmi_bit(unsigned int);
22extern int avail_to_resrv_perfctr_nmi(unsigned int);
23extern int reserve_perfctr_nmi(unsigned int);
24extern void release_perfctr_nmi(unsigned int);
25extern int reserve_evntsel_nmi(unsigned int);
26extern void release_evntsel_nmi(unsigned int);
27
28extern void setup_apic_nmi_watchdog(void *);
29extern void stop_apic_nmi_watchdog(void *);
30extern void disable_timer_nmi_watchdog(void);
31extern void enable_timer_nmi_watchdog(void);
32extern int nmi_watchdog_tick(struct pt_regs *regs, unsigned reason);
33extern void cpu_nmi_set_wd_enabled(void);
34
35extern atomic_t nmi_active;
36extern unsigned int nmi_watchdog;
37#define NMI_NONE 0
38#define NMI_IO_APIC 1
39#define NMI_LOCAL_APIC 2
40#define NMI_INVALID 3
41
42struct ctl_table;
43extern int proc_nmi_enabled(struct ctl_table *, int ,
44 void __user *, size_t *, loff_t *);
45extern int unknown_nmi_panic;
46
47void arch_trigger_all_cpu_backtrace(void);
48#define arch_trigger_all_cpu_backtrace arch_trigger_all_cpu_backtrace
49
50static inline void localise_nmi_watchdog(void)
51{
52 if (nmi_watchdog == NMI_IO_APIC)
53 nmi_watchdog = NMI_LOCAL_APIC;
54}
55
56/* check if nmi_watchdog is active (ie was specified at boot) */
57static inline int nmi_watchdog_active(void)
58{
59 /*
60 * actually it should be:
61 * return (nmi_watchdog == NMI_LOCAL_APIC ||
62 * nmi_watchdog == NMI_IO_APIC)
63 * but since they are power of two we could use a
64 * cheaper way --cvg
65 */
66 return nmi_watchdog & (NMI_LOCAL_APIC | NMI_IO_APIC);
67}
68#endif
69
70void lapic_watchdog_stop(void);
71int lapic_watchdog_init(unsigned nmi_hz);
72int lapic_wd_event(unsigned nmi_hz);
73unsigned lapic_adjust_nmi_hz(unsigned hz);
74void disable_lapic_nmi_watchdog(void);
75void enable_lapic_nmi_watchdog(void);
76void stop_nmi(void);
77void restart_nmi(void);
78
79#endif /* _ASM_X86_NMI_H */