iommu/amd: Allow downgrading page-sizes in alloc_pte()

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Before this patch it was not possible the downgrade a
mapping established with page-mode 7 to a mapping using
smaller page-sizes, because the pte_level != level check
prevented that.

Treat page-mode 7 like a non-present mapping and allow to
overwrite it in alloc_pte().

Signed-off-by: Joerg Roedel <jroedel@suse.de>

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This commit is contained in:

Joerg Roedel 2018-11-09 12:07:09 +01:00

parent 69be88520f

commit 6d568ef9a6

1 changed files with 9 additions and 3 deletions

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drivers/iommu/amd_iommu.c

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