iommupt: Add basic support for SW bits in the page table

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SW bits can be placed on items, including table entries, single OA's and
individual items within a contiguous OA. They are guaranteed to be ignored
by the HW. The API is very basic since the only use case so far is a
single bit.

Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

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Jason Gunthorpe 2025-10-23 15:22:30 -03:00 • committed by Joerg Roedel

parent 36ae67b139

commit bcc64b57b4

2 changed files with 91 additions and 0 deletions

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29

drivers/iommu/generic_pt/pt_common.h

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62

drivers/iommu/generic_pt/pt_fmt_defaults.h

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