Controlling IOVA addresses generated by IOMMU

[Sadanand Warrier]

Folks
   Is there any kernel API or control mechanism for an IO-MMU that one
could use to specify that a buffer earmarked for DMA would always have an
IOVA greater than 4GB?
Basically if I used pci_map_sg and passed a scatter list I would like the
dma_address field in the scatterlist structure to be always greater than
4GB when it returned.

Thanks

S
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20210407/ab2f1434/attachment.html>