Hello Jia, On 06/22/2018 03:44 AM, Jia He wrote: > Hi Eric > I want to test your smmu emulation patchset with vfio-pci ethernet device. > Could you kindly give me the NIC type information. > In my test, there is vf probe error for menallox connect 4 NIC and TX Unit > hang error for Intel X540 NIC. That's the reason why I ask this question. > virtual SMMUv3 is not integrated with VFIO and is not planned to be. It was tested with virtio-net-pci (without vhost-net).
With upstream code you should see the following warning: "SMMUV3 does not support vhost/vfio integration yet: devices of those types will not function properly" With "[PATCH v3 0/4] ARM SMMUv3: IOTLB Emulation and VHOST Support", vhost-net gets integrated. VFIO won't be integrated either. If vfio-pci device are attempted to be used along with vsmmu, you will get "SMMUv3 does not support notification on MAP: device %s will not function properly" My attempt to integrate the vsmmu with VFIO in the same manner as intel iommu (using a fake caching mode) was rejected by the kernel maintainer. So for VFIO use case, we need either 2 stage enablement (not implemented yet) or virtio-iommu. I will respin this latter against v0.7 spec probably next week. Thanks Eric