2008-10-22 22:26:29 -07:00
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#ifndef _ASM_X86_IRQ_H
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#define _ASM_X86_IRQ_H
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2008-05-02 22:14:44 +02:00
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/*
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* (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
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*
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* IRQ/IPI changes taken from work by Thomas Radke
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* <tomsoft@informatik.tu-chemnitz.de>
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*/
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#include <asm/apicdef.h>
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#include <asm/irq_vectors.h>
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static inline int irq_canonicalize(int irq)
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{
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return ((irq == 2) ? 9 : irq);
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}
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2010-06-28 14:15:54 +02:00
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#ifdef CONFIG_X86_32
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extern void irq_ctx_init(int cpu);
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2007-10-11 11:20:03 +02:00
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#else
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2008-05-02 22:14:44 +02:00
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# define irq_ctx_init(cpu) do { } while (0)
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#endif
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2010-06-28 14:15:54 +02:00
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#define __ARCH_HAS_DO_SOFTIRQ
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2008-05-02 22:14:44 +02:00
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#ifdef CONFIG_HOTPLUG_CPU
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#include <linux/cpumask.h>
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2008-12-16 17:33:58 -08:00
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extern void fixup_irqs(void);
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2009-10-26 14:24:34 -08:00
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extern void irq_force_complete_move(int);
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2007-10-11 11:20:03 +02:00
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#endif
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2008-05-02 22:14:44 +02:00
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2009-10-14 09:22:57 -05:00
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extern void (*x86_platform_ipi_callback)(void);
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2008-05-02 22:14:44 +02:00
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extern void native_init_IRQ(void);
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2009-02-06 14:09:40 -08:00
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extern bool handle_irq(unsigned irq, struct pt_regs *regs);
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2008-05-02 22:14:44 +02:00
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2009-02-06 14:09:41 -08:00
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extern unsigned int do_IRQ(struct pt_regs *regs);
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2008-05-02 22:14:44 +02:00
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/* Interrupt vector management */
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extern DECLARE_BITMAP(used_vectors, NR_VECTORS);
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2008-12-19 15:23:44 -08:00
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extern int vector_used_by_percpu_irq(unsigned int vector);
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2008-05-02 22:14:44 +02:00
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2009-08-20 09:41:38 +02:00
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extern void init_ISA_irqs(void);
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x86: Fix trigger_all_cpu_backtrace() implementation
The following change fixes the x86 implementation of
trigger_all_cpu_backtrace(), which was previously (accidentally,
as far as I can tell) disabled to always return false as on
architectures that do not implement this function.
trigger_all_cpu_backtrace(), as defined in include/linux/nmi.h,
should call arch_trigger_all_cpu_backtrace() if available, or
return false if the underlying arch doesn't implement this
function.
x86 did provide a suitable arch_trigger_all_cpu_backtrace()
implementation, but it wasn't actually being used because it was
declared in asm/nmi.h, which linux/nmi.h doesn't include. Also,
linux/nmi.h couldn't easily be fixed by including asm/nmi.h,
because that file is not available on all architectures.
I am proposing to fix this by moving the x86 definition of
arch_trigger_all_cpu_backtrace() to asm/irq.h.
Tested via: echo l > /proc/sysrq-trigger
Before the change, this uses a fallback implementation which
shows backtraces on active CPUs (using
smp_call_function_interrupt() )
After the change, this shows NMI backtraces on all CPUs
Signed-off-by: Michel Lespinasse <walken@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1370518875-1346-1-git-send-email-walken@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-06 04:41:15 -07:00
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#ifdef CONFIG_X86_LOCAL_APIC
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void arch_trigger_all_cpu_backtrace(void);
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#define arch_trigger_all_cpu_backtrace arch_trigger_all_cpu_backtrace
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#endif
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2008-10-22 22:26:29 -07:00
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#endif /* _ASM_X86_IRQ_H */
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