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 avail_to_resrv_perfctr_nmi_bit(unsigned int); 13 extern int reserve_perfctr_nmi(unsigned int); 14 extern void release_perfctr_nmi(unsigned int); 15 extern int reserve_evntsel_nmi(unsigned int); 16 extern void release_evntsel_nmi(unsigned int); 17 18 struct ctl_table; 19 extern int proc_nmi_enabled(struct ctl_table *, int , 20 void __user *, size_t *, loff_t *); 21 extern int unknown_nmi_panic; 22 23 #endif /* CONFIG_X86_LOCAL_APIC */ 24 25 #define NMI_FLAG_FIRST 1 26 27 enum { 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 38 typedef int (*nmi_handler_t)(unsigned int, struct pt_regs *); 39 40 struct 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 59 int __register_nmi_handler(unsigned int, struct nmiaction *); 60 61 void unregister_nmi_handler(unsigned int, const char *); 62 63 void stop_nmi(void); 64 void restart_nmi(void); 65 void local_touch_nmi(void); 66 67 #endif /* _ASM_X86_NMI_H */ 68