Messages in this thread | | | From | "Tian, Kevin" <> | Subject | RE: [PATCH v3 07/17] iommufd: Add IOMMU_RESV_IOVA_RANGES | Date | Fri, 28 Jul 2023 10:07:58 +0000 |
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> From: Liu, Yi L <yi.l.liu@intel.com> > Sent: Monday, July 24, 2023 7:04 PM > > This reports device's reserved IOVA regions to userspace. This is needed > in the nested translation as userspace owns stage-1 HWPT, and userspace > needs to exclude the reserved IOVA regions in the stage-1 HWPT hence > exclude > them in the device's DMA address space. > > This can also be used to figure out allowed IOVAs of an IOAS.
We may need a special type to mark SW_MSI since it requires identity mapping in stage-1 instead of being reserved.
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