On Thu, Nov 10, 2016 at 07:00:52PM +0100, Auger Eric wrote: > GICv2m and GICV3 ITS use dma-mapping iommu_dma_map_msi_msg to allocate > an MSI IOVA on-demand. Yes, and it the right thing to do there because as a DMA-API implementation the dma-iommu code cares about the address space allocation. As I understand it this is different in your case, as someone else is defining the address space layout. So why do you need to allocate it yourself? Joerg -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html