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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 <jpk@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
John Keller
2007-08-22 19:32:06 -05:00
committed by Tony Luck
parent 1aac0b5739
commit 6e9de18120
10 changed files with 64 additions and 4 deletions
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14
arch/ia64/sn/kernel/huberror.c
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@@ -185,11 +185,14 @@ void hubiio_crb_error_handler(struct hubdev_info *hubdev_info)
*/
void hub_error_init(struct hubdev_info *hubdev_info)
{
if (request_irq(SGI_II_ERROR, hub_eint_handler, IRQF_SHARED,
"SN_hub_error", (void *)hubdev_info))
"SN_hub_error", (void *)hubdev_info)) {
printk("hub_error_init: Failed to request_irq for 0x%p\n",
hubdev_info);
return;
return;
}
sn_set_err_irq_affinity(SGI_II_ERROR);
}
@@ -202,11 +205,14 @@ void hub_error_init(struct hubdev_info *hubdev_info)
*/
void ice_error_init(struct hubdev_info *hubdev_info)
{
if (request_irq
(SGI_TIO_ERROR, (void *)hub_eint_handler, IRQF_SHARED, "SN_TIO_error",
(void *)hubdev_info))
(void *)hubdev_info)) {
printk("ice_error_init: request_irq() error hubdev_info 0x%p\n",
hubdev_info);
return;
return;
}
sn_set_err_irq_affinity(SGI_TIO_ERROR);
}