Hi Niklas, On Wed, Sep 27, 2023 at 10:55:23AM +0200, Niklas Schnelle wrote: > The problem is that something seems to be broken in the iommu/core > branch. Regardless of whether I have my DMA API conversion on top or > with the base iommu/core branch I can not use ConnectX-4 VFs. Have you already tried to bisect the issue in the iommu/core branch? The result might sched some light on the issue. Regards, Joerg