78c0617646
Enable NMI on all cpus in UV system and add an NMI handler
to dump_stack on each cpu.
By default on x86 all the cpus except the boot cpu have NMI
masked off. This patch enables NMI on all cpus in UV system
and adds an NMI handler to dump_stack on each cpu. This
way if a system hangs we can NMI the machine and get a
backtrace from all the cpus.
Version 2: Use x86_platform driver mechanism for nmi init, per
Ingo's suggestion.
Version 3: Clean up Ingo's nits.
Signed-off-by: Russ Anderson <rja@sgi.com>
LKML-Reference: <20100226164912.GA24439@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
35 lines
987 B
C
35 lines
987 B
C
#ifndef _ASM_X86_UV_UV_H
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#define _ASM_X86_UV_UV_H
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enum uv_system_type {UV_NONE, UV_LEGACY_APIC, UV_X2APIC, UV_NON_UNIQUE_APIC};
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struct cpumask;
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struct mm_struct;
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#ifdef CONFIG_X86_UV
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extern enum uv_system_type get_uv_system_type(void);
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extern int is_uv_system(void);
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extern void uv_cpu_init(void);
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extern void uv_nmi_init(void);
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extern void uv_system_init(void);
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extern const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask,
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struct mm_struct *mm,
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unsigned long va,
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unsigned int cpu);
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#else /* X86_UV */
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static inline enum uv_system_type get_uv_system_type(void) { return UV_NONE; }
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static inline int is_uv_system(void) { return 0; }
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static inline void uv_cpu_init(void) { }
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static inline void uv_system_init(void) { }
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static inline const struct cpumask *
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uv_flush_tlb_others(const struct cpumask *cpumask, struct mm_struct *mm,
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unsigned long va, unsigned int cpu)
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{ return cpumask; }
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#endif /* X86_UV */
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#endif /* _ASM_X86_UV_UV_H */
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