diff options
Diffstat (limited to 'Documentation/x86_64')
| -rw-r--r-- | Documentation/x86_64/boot-options.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt index 4303e0c12476..e97a4c8fe6ea 100644 --- a/Documentation/x86_64/boot-options.txt +++ b/Documentation/x86_64/boot-options.txt @@ -199,6 +199,10 @@ IOMMU allowed overwrite iommu off workarounds for specific chipsets. soft Use software bounce buffering (default for Intel machines) noaperture Don't touch the aperture for AGP. + allowdac Allow DMA >4GB + When off all DMA over >4GB is forced through an IOMMU or bounce + buffering. + nodac Forbid DMA >4GB swiotlb=pages[,force] |