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powerpc/mpic: Fix regression caused by change of default IRQ affinity

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The Freescale implementation of MPIC only allows a single CPU destination
for non-IPI interrupts.  We add a flag to the mpic_init to distinquish
these variants of MPIC.  We pull in the irq_choose_cpu from sparc64 to
select a single CPU as the destination of the interrupt.

This is to deal with the fact that the default smp affinity was
changed by commit 1840475676 ("genirq:
Expose default irq affinity mask (take 3)") to be all CPUs.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Kumar Gala
2008-10-28 18:01:39 +00:00
committed by Paul Mackerras
parent f9226d572d
commit 3c10c9c45e
4 changed files with 61 additions and 6 deletions
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2
arch/powerpc/include/asm/mpic.h
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@ -355,6 +355,8 @@ struct mpic
#define MPIC_NO_BIAS 0x00000400
/* Ignore NIRQS as reported by FRR */
#define MPIC_BROKEN_FRR_NIRQS 0x00000800
/* Destination only supports a single CPU at a time */
#define MPIC_SINGLE_DEST_CPU 0x00001000
/* MPIC HW modification ID */
#define MPIC_REGSET_MASK 0xf0000000