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| author | Andi Kleen <ak@suse.de> | 2006-09-30 03:47:55 +0400 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-09-30 03:47:55 +0400 |
| commit | d802ab981da67d433fbb48f5640b7e3a9ba9fd54 (patch) | |
| tree | d0499267b945c506c5d3ad0c52608e0fd815385f | |
| parent | ded318ec80071557155604197ea45dcdb2a9ff2f (diff) | |
| download | linux-d802ab981da67d433fbb48f5640b7e3a9ba9fd54.tar.xz | |
[PATCH] Document iommu=panic
Signed-off-by: Andi Kleen <ak@suse.de>
| -rw-r--r-- | Documentation/x86_64/boot-options.txt | 1 | ||||
| -rw-r--r-- | arch/x86_64/kernel/pci-dma.c | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt index e97a4c8fe6ea..74b77f9e91bc 100644 --- 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] diff --git a/arch/x86_64/kernel/pci-dma.c b/arch/x86_64/kernel/pci-dma.c index 58be7929b4e2..f8d857453f8a 100644 --- 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) { |