Robin Murphy 5fb190b0b5 iommu/io-pgtable-arm: Simplify level indexing
The nature of the LPAE format means that data->pg_shift is always
redundant with data->bits_per_level, since they represent the size of a
page and the number of PTEs per page respectively, and the size of a PTE
is constant. Thus it works out more efficient to only store the latter,
and derive the former via a trivial addition where necessary.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
[will: Reworked granule check in iopte_to_paddr()]
Signed-off-by: Will Deacon <will@kernel.org>
2019-11-04 19:59:08 +00:00
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