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
12 extern int reserve_perfctr_nmi(unsigned int);
13 extern void release_perfctr_nmi(unsigned int);
14 extern int reserve_evntsel_nmi(unsigned int);
15 extern void release_evntsel_nmi(unsigned int);
16
17 extern int unknown_nmi_panic;
18
19 #endif /* CONFIG_X86_LOCAL_APIC */
20
21 #define NMI_FLAG_FIRST 1
22
23 enum {
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
34 typedef int (*nmi_handler_t)(unsigned int, struct pt_regs *);
35
36 struct 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
55 int __register_nmi_handler(unsigned int, struct nmiaction *);
56
57 void unregister_nmi_handler(unsigned int, const char *);
58
59 void stop_nmi(void);
60 void restart_nmi(void);
61 void local_touch_nmi(void);
62
63 #endif /* _ASM_X86_NMI_H */
64
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