Messages in this thread | | | Date | Wed, 29 Apr 2020 15:30:03 -0700 | From | Jacob Pan <> | Subject | Re: [PATCH v12 4/8] iommu/vt-d: Add bind guest PASID support |
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On Wed, 29 Apr 2020 16:12:01 +0200 Auger Eric <eric.auger@redhat.com> wrote:
> >> in last review Eric raised the open about what about binding the > >> same PASID to the same pdev multiple times. We discussed that > >> should be disallowed. Here can you check whether aux_domain is > >> enabled on pdev to restrict multiple-binding only for > >> sub-devices? > > Why aux_domain is sufficient? A pdev could have aux_domain enabled > > but still bind pdev many times more than its mdevs. > > > > Either we allow multiple bind or not. > > I tried to figure out whether binding the same PASID to the same pdev > was meaningful. I understood it is not. If this case can be detected > at VFIO level I am fine as well. I will remove the multiple bind support for now. Reintroduce it when we enable mdev.
Thanks,
Jacob
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