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authorJoerg Roedel <joro@8bytes.org>2012-09-26 12:44:36 +0200
committerJoerg Roedel <joro@8bytes.org>2013-01-28 10:48:30 +0100
commitafcc8a40a090f7a65d3b72bac1a26fc6dbb63b10 (patch)
tree68dca920cd86459c3468ae0b5d22eab5af4af4b2 /drivers/iommu
parent1c4248ca4e783e47cc34e313d9f82b4ea52774cc (diff)
downloadlinux-afcc8a40a090f7a65d3b72bac1a26fc6dbb63b10.tar.bz2
x86, io_apic: Introduce x86_io_apic_ops.print_entries for debugging
This call-back is used to dump IO-APIC entries for debugging purposes into the kernel log. VT-d needs a special routine for this and will overwrite the default. Signed-off-by: Joerg Roedel <joro@8bytes.org> Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/intel_irq_remapping.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index af8904de1d44..cb9a72d4cc09 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -617,6 +617,14 @@ static int __init intel_enable_irq_remapping(void)
goto error;
irq_remapping_enabled = 1;
+
+ /*
+ * VT-d has a different layout for IO-APIC entries when
+ * interrupt remapping is enabled. So it needs a special routine
+ * to print IO-APIC entries for debugging purposes too.
+ */
+ x86_io_apic_ops.print_entries = intel_ir_io_apic_print_entries;
+
pr_info("Enabled IRQ remapping in %s mode\n", eim ? "x2apic" : "xapic");
return eim ? IRQ_REMAP_X2APIC_MODE : IRQ_REMAP_XAPIC_MODE;