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e90c785352
Calling printk() from NMI context is bad (TM), so move it to IRQ context. In doing so we slightly change (probably wreck) the debugfs nmi_longest_ns thingy, in that it doesn't update to reflect the longest, nor does writing to it reset the count. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Don Zickus <dzickus@redhat.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Link: http://lkml.kernel.org/n/tip-rdw0au56a5ymis1u8p48c12d@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
#ifndef _ASM_X86_NMI_H
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#define _ASM_X86_NMI_H
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#include <linux/irq_work.h>
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#include <linux/pm.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#ifdef CONFIG_X86_LOCAL_APIC
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extern int avail_to_resrv_perfctr_nmi_bit(unsigned int);
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extern int reserve_perfctr_nmi(unsigned int);
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extern void release_perfctr_nmi(unsigned int);
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extern int reserve_evntsel_nmi(unsigned int);
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extern void release_evntsel_nmi(unsigned int);
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struct ctl_table;
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extern int proc_nmi_enabled(struct ctl_table *, int ,
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void __user *, size_t *, loff_t *);
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extern int unknown_nmi_panic;
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#endif /* CONFIG_X86_LOCAL_APIC */
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#define NMI_FLAG_FIRST 1
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enum {
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NMI_LOCAL=0,
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NMI_UNKNOWN,
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NMI_SERR,
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NMI_IO_CHECK,
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NMI_MAX
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};
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#define NMI_DONE 0
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#define NMI_HANDLED 1
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typedef int (*nmi_handler_t)(unsigned int, struct pt_regs *);
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struct nmiaction {
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struct list_head list;
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nmi_handler_t handler;
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u64 max_duration;
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struct irq_work irq_work;
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unsigned long flags;
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const char *name;
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};
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#define register_nmi_handler(t, fn, fg, n, init...) \
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({ \
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static struct nmiaction init fn##_na = { \
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.handler = (fn), \
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.name = (n), \
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.flags = (fg), \
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}; \
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__register_nmi_handler((t), &fn##_na); \
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})
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int __register_nmi_handler(unsigned int, struct nmiaction *);
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void unregister_nmi_handler(unsigned int, const char *);
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void stop_nmi(void);
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void restart_nmi(void);
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void local_touch_nmi(void);
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#endif /* _ASM_X86_NMI_H */
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