Jan Beulich
2009-Sep-21 16:10 UTC
[Xen-devel] [PATCH] x86: allow IRQs to work without APIC again
Non-IO-APIC IRQs must get 1:1 mapped between domain PIRQ and Xen IRQ.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
--- 2009-09-21.orig/xen/arch/x86/domain.c 2009-07-10 13:58:50.000000000 +0200
+++ 2009-09-21/xen/arch/x86/domain.c 2009-09-21 17:54:17.000000000 +0200
@@ -496,6 +496,10 @@ int arch_domain_create(struct domain *d,
memset(d->arch.irq_pirq, 0,
nr_irqs * sizeof(*d->arch.irq_pirq));
+ for ( i = 1; platform_legacy_irq(i); ++i )
+ if ( !IO_APIC_IRQ(i) )
+ d->arch.irq_pirq[i] = d->arch.pirq_irq[i] = i;
+
if ( (rc = iommu_domain_init(d)) != 0 )
goto fail;
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