- 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.
+ force Force IOMMU.
+ merge Do SG merging. Implies force (experimental)
+ nomerge Don't do SG merging.
+ forcesac For SAC mode for masks <40bits (experimental)
+ fullflush Flush IOMMU on each allocation (default)
+ nofullflush Don't use IOMMU fullflush
+ 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.
+
+ swiotlb=pages[,force]
+
+ pages Prereserve that many 128K pages for the software IO bounce buffering.
+ force Force all IO through the software TLB.