Hi Eric On 6/22/2018 2:39 PM, Auger Eric Wrote: > 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"
Thanks for the information. Actually, I am using your vsmmu-optim-v3 branch. I assumed vfio worked fine since you removed that warning in commit ("hw/arm/smmuv3: Add notifications on invalidation"). Seems I am wrong ;-) > > 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. Ok. got it, thanks > > Thanks > > Eric > -- Cheers, Jia