Hi; in real hardware an SMMUv3 might be sat in front of any DMA-capable device. Putting one in front of a PCI bus is common but not the only use case. Does QEMU's SMMUv3 model handle that, or is the implementation currently restricted to only handling DMA from PCI devices?
I ask because for the Realm Management Extension (aka Confidential Compute Architecture) we're going to need to put SMMUs in front of other devices (such as the GIC), so that their DMA is checked against the RME Granule Protection Tables. So if we don't currently handle non-PCI devices then that's a bit of extra preliminary work that we'll want to do :-) thanks -- PMM
