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 avail_to_resrv_perfctr_nmi_bit(unsigned int);
13extern int reserve_perfctr_nmi(unsigned int);
14extern void release_perfctr_nmi(unsigned int);
15extern int reserve_evntsel_nmi(unsigned int);
16extern void release_evntsel_nmi(unsigned int);
17
18struct ctl_table;
19extern int proc_nmi_enabled(struct ctl_table *, int ,
20 void __user *, size_t *, loff_t *);
21extern int unknown_nmi_panic;
22
23#endif /* CONFIG_X86_LOCAL_APIC */
24
25#define NMI_FLAG_FIRST 1
26
27enum {
28 NMI_LOCAL=0,
29 NMI_UNKNOWN,
30 NMI_SERR,
31 NMI_IO_CHECK,
32 NMI_MAX
33};
34
35#define NMI_DONE 0
36#define NMI_HANDLED 1
37
38typedef int (*nmi_handler_t)(unsigned int, struct pt_regs *);
39
40struct nmiaction {
41 struct list_head list;
42 nmi_handler_t handler;
43 u64 max_duration;
44 struct irq_work irq_work;
45 unsigned long flags;
46 const char *name;
47};
48
49#define register_nmi_handler(t, fn, fg, n, init...) \
50({ \
51 static struct nmiaction init fn##_na = { \
52 .handler = (fn), \
53 .name = (n), \
54 .flags = (fg), \
55 }; \
56 __register_nmi_handler((t), &fn##_na); \
57})
58
59int __register_nmi_handler(unsigned int, struct nmiaction *);
60
61void unregister_nmi_handler(unsigned int, const char *);
62
63void stop_nmi(void);
64void restart_nmi(void);
65void local_touch_nmi(void);
66
67#endif /* _ASM_X86_NMI_H */
68