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3c7569b284
As pointed out and tracked by Yinghai Lu <yhlu.kernel@gmail.com>:
Dhaval Giani got:
kernel BUG at arch/x86/kernel/io_apic_64.c:357!
invalid opcode: 0000 [1] SMP
CPU 24
...
his system (x3950) has 8 ioapic, irq > 256
This was caused by:
commit 9b7dc567d0
Author: Thomas Gleixner <tglx@linutronix.de>
Date: Fri May 2 20:10:09 2008 +0200
x86: unify interrupt vector defines
The interrupt vector defines are copied 4 times around with minimal
differences. Move them all into asm-x86/irq_vectors.h
It appears that Thomas did not notice that x86_64 does something
completely different when he merge irq_vectors.h
We can solve this for 2.6.27 by simply reintroducing the old heuristic
for setting NR_IRQS on x86_64 to a usable value, which trivially removes
the regression.
Long term it would be nice to harmonize the handling of ioapic interrupts
of x86_32 and x86_64 so we don't have this kind of confusion.
Dhaval Giani <dhaval@linux.vnet.ibm.com> tested an earlier version of
this patch by YH which confirms simply increasing NR_IRQS fixes the
problem.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Cc: Mike Travis <travis@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
181 lines
4.9 KiB
C
181 lines
4.9 KiB
C
#ifndef _ASM_IRQ_VECTORS_H
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#define _ASM_IRQ_VECTORS_H
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#include <linux/threads.h>
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#define NMI_VECTOR 0x02
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/*
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* IDT vectors usable for external interrupt sources start
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* at 0x20:
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*/
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#define FIRST_EXTERNAL_VECTOR 0x20
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#ifdef CONFIG_X86_32
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# define SYSCALL_VECTOR 0x80
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#else
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# define IA32_SYSCALL_VECTOR 0x80
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#endif
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/*
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* Reserve the lowest usable priority level 0x20 - 0x2f for triggering
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* cleanup after irq migration on 64 bit.
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*/
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#define IRQ_MOVE_CLEANUP_VECTOR FIRST_EXTERNAL_VECTOR
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/*
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* Vectors 0x20-0x2f are used for ISA interrupts on 32 bit.
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* Vectors 0x30-0x3f are used for ISA interrupts on 64 bit.
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*/
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#ifdef CONFIG_X86_32
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#define IRQ0_VECTOR (FIRST_EXTERNAL_VECTOR)
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#else
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#define IRQ0_VECTOR (FIRST_EXTERNAL_VECTOR + 0x10)
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#endif
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#define IRQ1_VECTOR (IRQ0_VECTOR + 1)
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#define IRQ2_VECTOR (IRQ0_VECTOR + 2)
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#define IRQ3_VECTOR (IRQ0_VECTOR + 3)
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#define IRQ4_VECTOR (IRQ0_VECTOR + 4)
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#define IRQ5_VECTOR (IRQ0_VECTOR + 5)
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#define IRQ6_VECTOR (IRQ0_VECTOR + 6)
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#define IRQ7_VECTOR (IRQ0_VECTOR + 7)
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#define IRQ8_VECTOR (IRQ0_VECTOR + 8)
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#define IRQ9_VECTOR (IRQ0_VECTOR + 9)
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#define IRQ10_VECTOR (IRQ0_VECTOR + 10)
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#define IRQ11_VECTOR (IRQ0_VECTOR + 11)
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#define IRQ12_VECTOR (IRQ0_VECTOR + 12)
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#define IRQ13_VECTOR (IRQ0_VECTOR + 13)
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#define IRQ14_VECTOR (IRQ0_VECTOR + 14)
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#define IRQ15_VECTOR (IRQ0_VECTOR + 15)
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/*
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* Special IRQ vectors used by the SMP architecture, 0xf0-0xff
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*
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* some of the following vectors are 'rare', they are merged
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* into a single vector (CALL_FUNCTION_VECTOR) to save vector space.
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* TLB, reschedule and local APIC vectors are performance-critical.
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*
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* Vectors 0xf0-0xfa are free (reserved for future Linux use).
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*/
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#ifdef CONFIG_X86_32
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# define SPURIOUS_APIC_VECTOR 0xff
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# define ERROR_APIC_VECTOR 0xfe
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# define INVALIDATE_TLB_VECTOR 0xfd
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# define RESCHEDULE_VECTOR 0xfc
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# define CALL_FUNCTION_VECTOR 0xfb
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# define CALL_FUNCTION_SINGLE_VECTOR 0xfa
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# define THERMAL_APIC_VECTOR 0xf0
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#else
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#define SPURIOUS_APIC_VECTOR 0xff
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#define ERROR_APIC_VECTOR 0xfe
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#define RESCHEDULE_VECTOR 0xfd
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#define CALL_FUNCTION_VECTOR 0xfc
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#define CALL_FUNCTION_SINGLE_VECTOR 0xfb
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#define THERMAL_APIC_VECTOR 0xfa
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#define THRESHOLD_APIC_VECTOR 0xf9
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#define INVALIDATE_TLB_VECTOR_END 0xf7
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#define INVALIDATE_TLB_VECTOR_START 0xf0 /* f0-f7 used for TLB flush */
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#define NUM_INVALIDATE_TLB_VECTORS 8
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#endif
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/*
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* Local APIC timer IRQ vector is on a different priority level,
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* to work around the 'lost local interrupt if more than 2 IRQ
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* sources per level' errata.
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*/
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#define LOCAL_TIMER_VECTOR 0xef
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/*
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* First APIC vector available to drivers: (vectors 0x30-0xee) we
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* start at 0x31(0x41) to spread out vectors evenly between priority
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* levels. (0x80 is the syscall vector)
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*/
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#ifdef CONFIG_X86_32
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# define FIRST_DEVICE_VECTOR 0x31
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#else
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# define FIRST_DEVICE_VECTOR (IRQ15_VECTOR + 2)
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#endif
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#define NR_VECTORS 256
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#define FPU_IRQ 13
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#define FIRST_VM86_IRQ 3
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#define LAST_VM86_IRQ 15
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#define invalid_vm86_irq(irq) ((irq) < 3 || (irq) > 15)
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#ifdef CONFIG_X86_64
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# if NR_CPUS < MAX_IO_APICS
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# define NR_IRQS (NR_VECTORS + (32 * NR_CPUS))
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# else
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# define NR_IRQS (NR_VECTORS + (32 * MAX_IO_APICS))
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# endif
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# define NR_IRQ_VECTORS NR_IRQS
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#elif !defined(CONFIG_X86_VOYAGER)
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# if defined(CONFIG_X86_IO_APIC) || defined(CONFIG_PARAVIRT) || defined(CONFIG_X86_VISWS)
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# define NR_IRQS 224
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# if (224 >= 32 * NR_CPUS)
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# define NR_IRQ_VECTORS NR_IRQS
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# else
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# define NR_IRQ_VECTORS (32 * NR_CPUS)
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# endif
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# else /* IO_APIC || PARAVIRT */
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# define NR_IRQS 16
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# define NR_IRQ_VECTORS NR_IRQS
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# endif
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#else /* !VISWS && !VOYAGER */
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# define NR_IRQS 224
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# define NR_IRQ_VECTORS NR_IRQS
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#endif /* VISWS */
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/* Voyager specific defines */
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/* These define the CPIs we use in linux */
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#define VIC_CPI_LEVEL0 0
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#define VIC_CPI_LEVEL1 1
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/* now the fake CPIs */
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#define VIC_TIMER_CPI 2
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#define VIC_INVALIDATE_CPI 3
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#define VIC_RESCHEDULE_CPI 4
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#define VIC_ENABLE_IRQ_CPI 5
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#define VIC_CALL_FUNCTION_CPI 6
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#define VIC_CALL_FUNCTION_SINGLE_CPI 7
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/* Now the QIC CPIs: Since we don't need the two initial levels,
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* these are 2 less than the VIC CPIs */
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#define QIC_CPI_OFFSET 1
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#define QIC_TIMER_CPI (VIC_TIMER_CPI - QIC_CPI_OFFSET)
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#define QIC_INVALIDATE_CPI (VIC_INVALIDATE_CPI - QIC_CPI_OFFSET)
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#define QIC_RESCHEDULE_CPI (VIC_RESCHEDULE_CPI - QIC_CPI_OFFSET)
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#define QIC_ENABLE_IRQ_CPI (VIC_ENABLE_IRQ_CPI - QIC_CPI_OFFSET)
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#define QIC_CALL_FUNCTION_CPI (VIC_CALL_FUNCTION_CPI - QIC_CPI_OFFSET)
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#define QIC_CALL_FUNCTION_SINGLE_CPI (VIC_CALL_FUNCTION_SINGLE_CPI - QIC_CPI_OFFSET)
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#define VIC_START_FAKE_CPI VIC_TIMER_CPI
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#define VIC_END_FAKE_CPI VIC_CALL_FUNCTION_SINGLE_CPI
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/* this is the SYS_INT CPI. */
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#define VIC_SYS_INT 8
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#define VIC_CMN_INT 15
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/* This is the boot CPI for alternate processors. It gets overwritten
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* by the above once the system has activated all available processors */
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#define VIC_CPU_BOOT_CPI VIC_CPI_LEVEL0
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#define VIC_CPU_BOOT_ERRATA_CPI (VIC_CPI_LEVEL0 + 8)
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#endif /* _ASM_IRQ_VECTORS_H */
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