Messages in this thread | | | Date | Mon, 16 Nov 2020 11:46:35 -0400 | From | Jason Gunthorpe <> | Subject | Re: [PATCH v4 06/17] PCI: add SIOV and IMS capability detection |
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On Mon, Nov 16, 2020 at 07:31:49AM +0000, Tian, Kevin wrote:
> > The subdevices require PASID & IOMMU in native, but inside the guest there > > is no > > need for IOMMU unless you want to build SVM on top. subdevices work > > without > > any vIOMMU or hypercall in the guest. Only because they look like normal > > PCI devices we could map interrupts to legacy MSIx. > > Guest managed subdevices on PF/VF requires vIOMMU.
Why? I've never heard we need vIOMMU for our existing SRIOV flows in VMs??
Jason
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