On Wed, 8 Jul 2020 17:24:44 +0200
Christoph Hellwig wrote:
> Note that as-is this breaks the XSK buffer pool, which unfortunately
> poked directly into DMA internals. A fix for that is already queued
> up in the netdev tree.
>
> Jesper and XDP gang: this should not regress any performance as
>
Hi all,
I've recently beeing chatting with Lu about using dma-iommu and
per-device DMA ops in the intel IOMMU driver, and one missing feature
in dma-iommu is a bypass mode where the direct mapping is used even
when an iommu is attached to improve performance. The powerpc
code already has a simila
