Re: [PATCH v3 03/15] hw/pci: Add a pci_device_iommu_memory_region() helper

[Peter Xu]

On Tue, May 30, 2023 at 06:59:25PM +0100, Joao Martins wrote:
> Much like pci_device_iommu_address_space() fetches the IOMMU AS, add a
> pci_device_iommu_memory_region() which lets it return an the IOMMU MR
> associated with it. The IOMMU MR is returned correctly for vIOMMUs using
> pci_setup_iommu_info(). Note that today most vIOMMUs create the address
> space and IOMMU MR at the same time, it's just mainly that there's API
> to make the latter available.

Have you looked into other archs outside x86?  IIRC on some other arch one
address space can have >1 IOMMU memory regions.. at least with such AS and
MR layering it seems always possible?  Thanks,

-- 
Peter Xu