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x86: apic honour irq affinity which was set in early boot 

setup_ioapic_dest() is called after the non boot cpus have been
brought up. It sets the irq affinity of all already configured
interrupts to all cpus and ignores affinity settings which were
done by the early bootup code.

If the IRQ_NO_BALANCING or IRQ_AFFINITY_SET flags are set then use the
affinity mask from the irq descriptor and not TARGET_CPUS.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
hifive-unleashed-5.1
Thomas Gleixner 2008-11-07 12:33:49 +01:00 committed by Ingo Molnar
parent 612e3684c1
commit 6c2e94033d
1 changed files with 22 additions and 6 deletions
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28
arch/x86/kernel/io_apic.c
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@ -3761,7 +3761,9 @@ int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity)
void __init setup_ioapic_dest(void)
{
int pin, ioapic, irq, irq_entry;
struct irq_desc *desc;
struct irq_cfg *cfg;
cpumask_t mask;
if (skip_ioapic_setup == 1)
return;
@ -3778,16 +3780,30 @@ void __init setup_ioapic_dest(void)
* cpu is online.
*/
cfg = irq_cfg(irq);
if (!cfg->vector)
if (!cfg->vector) {
setup_IO_APIC_irq(ioapic, pin, irq,
irq_trigger(irq_entry),
irq_polarity(irq_entry));
#ifdef CONFIG_INTR_REMAP
else if (intr_remapping_enabled)
set_ir_ioapic_affinity_irq(irq, TARGET_CPUS);
#endif
continue;
}
/*
* Honour affinities which have been set in early boot
*/
desc = irq_to_desc(irq);
if (desc->status &
(IRQ_NO_BALANCING | IRQ_AFFINITY_SET))
mask = desc->affinity;
else
set_ioapic_affinity_irq(irq, TARGET_CPUS);
mask = TARGET_CPUS;
#ifdef CONFIG_INTR_REMAP
if (intr_remapping_enabled)
set_ir_ioapic_affinity_irq(irq, mask);
else
#endif
set_ioapic_affinity_irq(irq, mask);
}
}