Messages in this thread | | | Date | Fri, 20 May 2022 10:58:53 +0200 | From | Joerg Roedel <> | Subject | Re: [PATCH v2] iommu/amd: Set translation valid bit only when IO page tables are in used |
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On Fri, May 20, 2022 at 09:54:51AM +0100, Robin Murphy wrote: > The .def_domain type op already allows drivers to do exactly this sort of > override. You could also conditionally reject IOMMU_DOMAIN_PASSTHROUGH in > .domain_alloc for good measure, provided that (for now at least*) SNP is a > global thing rather than per-instance.
Yeah, that could work. I am just not sure the IOMMU core behaves well in all situations when allocation IOMMU_DOMAIN_PASSTHROUGH suddenly starts to fail. I would feel better if this is checked and tested :)
Regards,
Joerg
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