tracing: Avoid soft lockup in trace_pipe
[deliverable/linux.git] / arch / x86 / include / asm / nmi.h
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1#ifndef _ASM_X86_NMI_H
2#define _ASM_X86_NMI_H
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3
4#include <linux/pm.h>
5#include <asm/irq.h>
6#include <asm/io.h>
7
4a7863cc 8#ifdef CONFIG_X86_LOCAL_APIC
6d60cd53 9
6d60cd53 10extern int avail_to_resrv_perfctr_nmi_bit(unsigned int);
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11extern int reserve_perfctr_nmi(unsigned int);
12extern void release_perfctr_nmi(unsigned int);
13extern int reserve_evntsel_nmi(unsigned int);
14extern void release_evntsel_nmi(unsigned int);
6d60cd53 15
6d60cd53 16struct ctl_table;
8d65af78 17extern int proc_nmi_enabled(struct ctl_table *, int ,
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18 void __user *, size_t *, loff_t *);
19extern int unknown_nmi_panic;
20
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21void arch_trigger_all_cpu_backtrace(void);
22#define arch_trigger_all_cpu_backtrace arch_trigger_all_cpu_backtrace
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23#endif
24
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25/*
26 * Define some priorities for the nmi notifier call chain.
27 *
28 * Create a local nmi bit that has a higher priority than
29 * external nmis, because the local ones are more frequent.
30 *
31 * Also setup some default high/normal/low settings for
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32 * subsystems to registers with. Using 4 bits to separate
33 * the priorities. This can go a lot higher if needed be.
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34 */
35
36#define NMI_LOCAL_SHIFT 16 /* randomly picked */
37#define NMI_LOCAL_BIT (1ULL << NMI_LOCAL_SHIFT)
38#define NMI_HIGH_PRIOR (1ULL << 8)
39#define NMI_NORMAL_PRIOR (1ULL << 4)
40#define NMI_LOW_PRIOR (1ULL << 0)
41#define NMI_LOCAL_HIGH_PRIOR (NMI_LOCAL_BIT | NMI_HIGH_PRIOR)
42#define NMI_LOCAL_NORMAL_PRIOR (NMI_LOCAL_BIT | NMI_NORMAL_PRIOR)
43#define NMI_LOCAL_LOW_PRIOR (NMI_LOCAL_BIT | NMI_LOW_PRIOR)
44
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45void stop_nmi(void);
46void restart_nmi(void);
47
1965aae3 48#endif /* _ASM_X86_NMI_H */
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