diff options
| -rw-r--r-- | Documentation/x86_64/boot-options.txt | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt index 6959c7eb597b..d78f8dbf9e8b 100644 --- a/Documentation/x86_64/boot-options.txt +++ b/Documentation/x86_64/boot-options.txt @@ -136,7 +136,7 @@ PCI IOMMU - iommu=[size][,noagp][,off][,force][,noforce][,leak][,memaper[=order]] + iommu=[size][,noagp][,off][,force][,noforce][,leak][,memaper[=order]][,soft] size set size of iommu (in bytes) noagp don't initialize the AGP driver and use full aperture. off don't use the IOMMU @@ -144,5 +144,9 @@ IOMMU memaper[=order] allocate an own aperture over RAM with size 32MB^order. noforce don't force IOMMU usage. Default. force Force IOMMU + soft Use software bounce buffering for non 32bit IO. Default on Intel + machines. + swiotlb=pages + Prereserve that many 4K pages for the software IO bounce buffering. |