Tried kernels 4.10.13 and 4.11, with CONFIG_GART_IOMMU=y CONFIG_IOMMU_HELPER=y CONFIG_IOMMU_API=y CONFIG_IOMMU_SUPPORT=y CONFIG_IOMMU_IOVA=y CONFIG_AMD_IOMMU=y CONFIG_AMD_IOMMU_V2=m Chipset is 990FX, and AFAICT the V2 is for the APU (bdver3 and 4 vintage).
When I enable the IOMMU in the BIOS I get stack traces. Is anyone using AMD_IOMMU successfully? If so, any tips?