Messages in this thread | | | Date | Fri, 24 Mar 2023 13:30:14 -0300 | From | Jason Gunthorpe <> | Subject | Re: [PATCH v1 12/14] iommu/arm-smmu-v3: Support IOMMU_DOMAIN_NESTED type of allocations |
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On Fri, Mar 24, 2023 at 04:44:58PM +0100, Eric Auger wrote:
> Please can you explain the (use) case where !parent. This creates an > unmanaged S1?
If parent is not specified then userspace can force the IOPTE format to be S1 or S2 of a normal unmanaged domain.
Not sure there is a usecase, but it seems reasonable to support. It would be useful if there is further parameterization of the S1 like limiting the number of address bits or something.
Jason
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