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linux/include/linux/generic_pt
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Jason Gunthorpe 1eb0ae6fbd iommupt/vtd: Support mgaw's less than a 4 level walk for first stage 
If the IOVA is limited to less than 48 the page table will be constructed
with a 3 level configuration which is unsupported by hardware.

Like the second stage the caller needs to pass in both the top_level an
the vasz to specify a table that has more levels than required to hold the
IOVA range.

Fixes: 6cbc09b771 ("iommu/vt-d: Restore previous domain::aperture_end calculation")
Reported-by: Calvin Owens <calvin@wbinvd.org>
Closes: https://lore.kernel.org/r/8f257d2651eb8a4358fcbd47b0145002e5f1d638.1764237717.git.calvin@wbinvd.org
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Tested-by: Calvin Owens <calvin@wbinvd.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
History 2025-11-28 08:43:55 +01:00
..
common.h iommupt: Add the Intel VT-d second stage page table format 2025-11-05 09:50:17 +01:00
iommu.h iommupt/vtd: Support mgaw's less than a 4 level walk for first stage 2025-11-28 08:43:55 +01:00