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Binding interrupts to a CPU consists of two parts: setting up CPU

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affinity for the interrupt thread, and requesting that underlying
hardware direct interrupts to the CPU.  For software interrupt
threads, implement a no-op interrupt event binder that returns
success, so that the interrupt management code will just set the
ithread's affinity and succeed.

Reviewed by:	jhb
MFC after:	1 week
This commit is contained in:
rwatson 2009-05-18 14:02:55 +00:00
parent a6c06ba89c
commit d9e163e093
1 changed files with 13 additions and 1 deletions
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14
sys/kern/kern_intr.c
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@ -967,6 +967,18 @@ intr_event_schedule_thread(struct intr_event *ie, struct intr_thread *it)
}
#endif
/*
* Allow interrupt event binding for software interrupt handlers -- a no-op,
* since interrupts are generated in software rather than being directed by
* a PIC.
*/
static int
swi_assign_cpu(void *arg, u_char cpu)
{
return (0);
}
/*
* Add a software interrupt handler to a specified event. If a given event
* is not specified, then a new event is created.
@ -988,7 +1000,7 @@ swi_add(struct intr_event **eventp, const char *name, driver_intr_t handler,
return (EINVAL);
} else {
error = intr_event_create(&ie, NULL, IE_SOFT, 0,
NULL, NULL, NULL, NULL, "swi%d:", pri);
NULL, NULL, NULL, swi_assign_cpu, "swi%d:", pri);
if (error)
return (error);
if (eventp != NULL)