45486f81c9
x86_64 and i386 behave inconsistently when sending an IPI on vector 2 (NMI_VECTOR). Make both behave the same, so IPI 2 is sent as NMI. The crash code was abusing send_IPI_allbutself() by passing a code instead of a vector, it only worked because crash knew about the internal code of send_IPI_allbutself(). Change crash to use NMI_VECTOR instead, and remove the comment about how crash was abusing the function. This patch is a pre-requisite for fixing the problem where sending an IPI as NMI would reboot some Dell Xeon systems. I cannot fix that problem while crash continus to abuse send_IPI_allbutself(). It also removes the inconsistency between i386 and x86_64 for NMI_VECTOR. That will simplify all the RAS code that needs to bring all the cpus to a clean stop, even when one or more cpus are spinning disabled. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
#ifndef _ASM_HW_IRQ_H
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#define _ASM_HW_IRQ_H
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/*
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* linux/include/asm/hw_irq.h
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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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* moved some of the old arch/i386/kernel/irq.h to here. VY
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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 <linux/profile.h>
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#include <asm/atomic.h>
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#include <asm/irq.h>
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#include <asm/sections.h>
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struct hw_interrupt_type;
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#define NMI_VECTOR 0x02
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/*
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* Various low-level irq details needed by irq.c, process.c,
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* time.c, io_apic.c and smp.c
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*
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* Interrupt entry/exit code at both C and assembly level
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*/
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extern u8 irq_vector[NR_IRQ_VECTORS];
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#define IO_APIC_VECTOR(irq) (irq_vector[irq])
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#define AUTO_ASSIGN -1
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extern void (*interrupt[NR_IRQS])(void);
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#ifdef CONFIG_SMP
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fastcall void reschedule_interrupt(void);
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fastcall void invalidate_interrupt(void);
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fastcall void call_function_interrupt(void);
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#endif
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#ifdef CONFIG_X86_LOCAL_APIC
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fastcall void apic_timer_interrupt(void);
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fastcall void error_interrupt(void);
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fastcall void spurious_interrupt(void);
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fastcall void thermal_interrupt(struct pt_regs *);
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#define platform_legacy_irq(irq) ((irq) < 16)
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#endif
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void disable_8259A_irq(unsigned int irq);
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void enable_8259A_irq(unsigned int irq);
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int i8259A_irq_pending(unsigned int irq);
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void make_8259A_irq(unsigned int irq);
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void init_8259A(int aeoi);
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void FASTCALL(send_IPI_self(int vector));
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void init_VISWS_APIC_irqs(void);
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void setup_IO_APIC(void);
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void disable_IO_APIC(void);
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void print_IO_APIC(void);
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int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
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void send_IPI(int dest, int vector);
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void setup_ioapic_dest(void);
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extern unsigned long io_apic_irqs;
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extern atomic_t irq_err_count;
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extern atomic_t irq_mis_count;
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#define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))
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#if defined(CONFIG_X86_IO_APIC)
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static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i)
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{
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if (IO_APIC_IRQ(i))
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send_IPI_self(IO_APIC_VECTOR(i));
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}
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#else
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static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
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#endif
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#endif /* _ASM_HW_IRQ_H */
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