1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_NMI_H
3#define _ASM_X86_NMI_H
4
5#include <linux/irq_work.h>
6#include <linux/pm.h>
7#include <asm/irq.h>
8#include <asm/io.h>
9
10#ifdef CONFIG_X86_LOCAL_APIC
11
12extern int reserve_perfctr_nmi(unsigned int);
13extern void release_perfctr_nmi(unsigned int);
14extern int reserve_evntsel_nmi(unsigned int);
15extern void release_evntsel_nmi(unsigned int);
16
17struct ctl_table;
18extern int proc_nmi_enabled(struct ctl_table *, int ,
19 void __user *, size_t *, loff_t *);
20extern int unknown_nmi_panic;
21
22#endif /* CONFIG_X86_LOCAL_APIC */
23
24#define NMI_FLAG_FIRST 1
25
26enum {
27 NMI_LOCAL=0,
28 NMI_UNKNOWN,
29 NMI_SERR,
30 NMI_IO_CHECK,
31 NMI_MAX
32};
33
34#define NMI_DONE 0
35#define NMI_HANDLED 1
36
37typedef int (*nmi_handler_t)(unsigned int, struct pt_regs *);
38
39struct nmiaction {
40 struct list_head list;
41 nmi_handler_t handler;
42 u64 max_duration;
43 unsigned long flags;
44 const char *name;
45};
46
47#define register_nmi_handler(t, fn, fg, n, init...) \
48({ \
49 static struct nmiaction init fn##_na = { \
50 .list = LIST_HEAD_INIT(fn##_na.list), \
51 .handler = (fn), \
52 .name = (n), \
53 .flags = (fg), \
54 }; \
55 __register_nmi_handler((t), &fn##_na); \
56})
57
58int __register_nmi_handler(unsigned int, struct nmiaction *);
59
60void unregister_nmi_handler(unsigned int, const char *);
61
62void stop_nmi(void);
63void restart_nmi(void);
64void local_touch_nmi(void);
65
66#endif /* _ASM_X86_NMI_H */
67

source code of linux/arch/x86/include/asm/nmi.h