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
17extern int unknown_nmi_panic;
18
19#endif /* CONFIG_X86_LOCAL_APIC */
20
21#define NMI_FLAG_FIRST	1
22
23enum {
24	NMI_LOCAL=0,
25	NMI_UNKNOWN,
26	NMI_SERR,
27	NMI_IO_CHECK,
28	NMI_MAX
29};
30
31#define NMI_DONE	0
32#define NMI_HANDLED	1
33
34typedef int (*nmi_handler_t)(unsigned int, struct pt_regs *);
35
36struct nmiaction {
37	struct list_head	list;
38	nmi_handler_t		handler;
39	u64			max_duration;
40	unsigned long		flags;
41	const char		*name;
42};
43
44#define register_nmi_handler(t, fn, fg, n, init...)	\
45({							\
46	static struct nmiaction init fn##_na = {	\
47		.list = LIST_HEAD_INIT(fn##_na.list),	\
48		.handler = (fn),			\
49		.name = (n),				\
50		.flags = (fg),				\
51	};						\
52	__register_nmi_handler((t), &fn##_na);		\
53})
54
55int __register_nmi_handler(unsigned int, struct nmiaction *);
56
57void unregister_nmi_handler(unsigned int, const char *);
58
59void stop_nmi(void);
60void restart_nmi(void);
61void local_touch_nmi(void);
62
63#endif /* _ASM_X86_NMI_H */
64