On Fri, 19 Dec 2025 at 22:25, <[email protected]> wrote: > > By SMMUv3 specification it can be attached either to PCIe Root > Complex or regular IO bus devices. However, current > implementation only allow to associate with PCI bus. > > This patch series add support to use SMMU for sysbus devices. > > One usage example implemented for virtio-mmio, which allow > devices to perform DMA operations SMMUv3 with address translation > and isolation.
If you want virtio devices behind an SMMU, why not use the PCI virtio? The only SMMU sysbus requirement I'm aware of is that for RME we will want to have things like the GIC do GPT lookups, which is most conveniently done by having them route through the existing for-PCI SMMU, rather than by having an extra SMMU just for them. thanks -- PMM
