Messages in this thread Patch in this message | | | From | Jeremy Fitzhardinge <> | Subject | [PATCH 16/17] xen: fix legacy irq setup, make ioapic-less machines work. | Date | Wed, 27 May 2009 00:37:29 -0700 |
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From: Gerd Hoffmann <kraxel@xeni.home.kraxel.org>
If the machine has no IO APICs, then just allocate a set of legacy interrupts.
[ Impact: fix Xen compatibility with old machines ]
Signed-off-by: Gerd Hoffmann <kraxel@xeni.home.kraxel.org> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> --- arch/x86/xen/pci.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/x86/xen/pci.c b/arch/x86/xen/pci.c index 4b286f1..07b59fe 100644 --- a/arch/x86/xen/pci.c +++ b/arch/x86/xen/pci.c @@ -66,6 +66,12 @@ void __init xen_setup_pirqs(void) { int irq; + if (0 == nr_ioapics) { + for (irq = 0; irq < NR_IRQS_LEGACY; irq++) + xen_allocate_pirq(irq, "xt-pic"); + return; + } + /* Pre-allocate legacy irqs */ for (irq = 0; irq < NR_IRQS_LEGACY; irq++) { int trigger, polarity; -- 1.6.0.6
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