Bastian Blank
2010-Mar-24 11:17 UTC
[Xen-devel] [PATCH] Allow all unused GSI to be configured via IO-APIC
Currently Xen disallows setting up any GSI < 16. This makes it
impossible by the kernel to use any PCI devices without ACPI override
but a mapping to this interrupts via IO-APIC.
The patch allows all unused interrupts to be setup via IO-APIC.
Signed-off-by: Bastian Blank <waldi@debian.org>
diff -r 7b63f677f245 xen/arch/x86/mpparse.c
--- a/xen/arch/x86/mpparse.c Thu Mar 18 11:03:07 2010 +0000
+++ b/xen/arch/x86/mpparse.c Wed Mar 24 12:13:11 2010 +0100
@@ -1103,6 +1103,7 @@
int ioapic = -1;
int ioapic_pin = 0;
int idx, bit = 0;
+
/*
* Mapping between Global System Interrups, which
* represent all possible interrupts, and IRQs
@@ -1126,6 +1127,9 @@
if (ioapic_renumber_irq)
gsi = ioapic_renumber_irq(ioapic, gsi);
+ if (!(irq_to_desc(gsi)->status & IRQ_DISABLED))
+ return -EEXIST;
+
/*
* Avoid pin reprogramming. PRTs typically include entries
* with redundant pin->gsi mappings (but unique PCI devices);
diff -r 7b63f677f245 xen/arch/x86/physdev.c
--- a/xen/arch/x86/physdev.c Thu Mar 18 11:03:07 2010 +0000
+++ b/xen/arch/x86/physdev.c Wed Mar 24 12:13:11 2010 +0100
@@ -476,12 +476,8 @@
ret = -EINVAL;
if ( setup_gsi.gsi < 0 || setup_gsi.gsi >= nr_irqs_gsi )
break;
- /* GSI < 16 has been setup by hypervisor */
- if ( setup_gsi.gsi >= 16 )
- ret = mp_register_gsi(setup_gsi.gsi, setup_gsi.triggering,
+ ret = mp_register_gsi(setup_gsi.gsi, setup_gsi.triggering,
setup_gsi.polarity);
- else
- ret = -EEXIST;
break;
}
default:
--
Hailing frequencies open, Captain.
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