On Mon, 6 Mar 2023 11:30:20 -0600 (CST), Timothy Pearson wrote:
> PPC64 IOMMU API defines iommu_table_group_ops which handles DMA windows
> for PEs: control the ownership, create/set/unset a table the hardware
> for dynamic DMA windows (DDW). VFIO uses the API to implement support
> on POWER.
>
> So far only PowerNV IODA2 (POWER8 and newer machines) implemented this and other cases (POWER7 or nested KVM) did not and instead reused
> existing iommu_table structs. This means 1) no DDW 2) ownership transfer
> is done directly in the VFIO SPAPR TCE driver.
>
> [...]
Applied to powerpc/next.
[1/4] powerpc/iommu: Add "borrowing" iommu_table_group_ops
https://git.kernel.org/powerpc/c/9d67c94335096311c0bc7556ad1022de7385790b
cheers
