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[IA64] SN: Add support for CPU disable

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Add additional support for CPU disable on SN platforms.
Correctly setup the smp_affinity mask for I/O error IRQs.
Restrict the use of the feature to Altix 4000 and 450 systems
running with a CPU disable capable PROM, and do not allow disabling
of CPU 0.

Signed-off-by: John Keller <[email protected]>
Signed-off-by: Tony Luck <[email protected]>
This commit is contained in:
John Keller 2007-08-22 19:32:06 -05:00 • committed by Tony Luck
commit 6e9de18120
10 changed files with 64 additions and 4 deletions
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1
include/asm-ia64/sn/arch.h
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@ -81,5 +81,6 @@ extern u8 sn_sharing_domain_size;
extern u8 sn_region_size;
extern void sn_flush_all_caches(long addr, long bytes);
extern bool sn_cpu_disable_allowed(int cpu);
#endif /* _ASM_IA64_SN_ARCH_H */

1
include/asm-ia64/sn/intr.h
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@ -60,6 +60,7 @@ extern u64 sn_intr_alloc(nasid_t, int,
int, nasid_t, int);
extern void sn_intr_free(nasid_t, int, struct sn_irq_info *);
extern struct sn_irq_info *sn_retarget_vector(struct sn_irq_info *, nasid_t, int);
extern void sn_set_err_irq_affinity(unsigned int);
extern struct list_head **sn_irq_lh;
#define CPU_VECTOR_TO_IRQ(cpuid,vector) (vector)

1
include/asm-ia64/sn/sn_feature_sets.h
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@ -31,6 +31,7 @@ extern int sn_prom_feature_available(int id);
#define PRF_PAL_CACHE_FLUSH_SAFE 0
#define PRF_DEVICE_FLUSH_LIST 1
#define PRF_HOTPLUG_SUPPORT 2
#define PRF_CPU_DISABLE_SUPPORT 3
/* --------------------- OS Features -------------------------------*/