[PATCH] Document iommu=panic

Signed-off-by: Andi Kleen <ak@suse.de>

[PATCH] Document iommu=panic
Signed-off-by: Andi Kleen <ak@suse.de>
d802ab98 · Andi Kleen · Andi Kleen · ded318ec · d802ab98 · d802ab98
Commit d802ab98 authored Sep 30, 2006 by Andi Kleen Committed by Andi Kleen Sep 30, 2006
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Documentation/x86_64/boot-options.txt Documentation/x86_64/boot-options.txt +1 -0

arch/x86_64/kernel/pci-dma.c arch/x86_64/kernel/pci-dma.c +1 -0

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--- a/Documentation/x86_64/boot-options.txt
+++ b/Documentation/x86_64/boot-options.txt
@@ -203,6 +203,7 @@ IOMMU
 	    When off all DMA over >4GB is forced through an IOMMU or bounce
 	    buffering.
   nodac    Forbid DMA >4GB
+   panic    Always panic when IOMMU overflows

  swiotlb=pages[,force]


--- a/arch/x86_64/kernel/pci-dma.c
+++ b/arch/x86_64/kernel/pci-dma.c
@@ -245,6 +245,7 @@ EXPORT_SYMBOL(dma_set_mask);
   noaperture Don't touch the aperture for AGP.
   allowdac Allow DMA >4GB
   nodac    Forbid DMA >4GB
+   panic    Force panic when IOMMU overflows
 */
 __init int iommu_setup(char *p)
 {