Hi Christoph, On 9/29/20 8:03 AM, Christoph Hellwig wrote: > On Mon, Sep 28, 2020 at 09:50:36PM +0200, Eric Auger wrote: >> VFIO currently exposes the usable IOVA regions through the >> VFIO_IOMMU_GET_INFO ioctl. However it fails to take into account >> the dma_mask of the devices within the container. The top limit >> currently is defined by the iommu aperture. > > Can we take a step back here? The dma_mask only has a meaning for > the DMA API, and not the iommu API, it should have no relevance here. > > More importantly if we are using vfio no dma_mask should be set to > start with.
You will find more context in my reply to Alex. Thanks Eric > >> + if (geo.aperture_end < ULLONG_MAX && geo.aperture_end != >> geo.aperture_start) { > > Please avoid pointlessly overlong lines. > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu