Isaac J. Manjarres ba575b2222 BACKPORT: FROMLIST: iommu/io-pgtable: Introduce map_pages() as a page table op ...

Mapping memory into io-pgtables follows the same semantics
that unmapping memory used to follow (i.e. a buffer will be
mapped one page block per call to the io-pgtable code). This
means that it can be optimized in the same way that unmapping
memory was, so add a map_pages() callback to the io-pgtable
ops structure, so that a range of pages of the same size
can be mapped within the same call.

Bug: 178537788
Change-Id: I5f2a86f21216f26b2cc2f70904c2968467c5363a
Link: https://lore.kernel.org/linux-iommu/20210408171402.12607-1-isaacm@codeaurora.org/T/#t
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
Suggested-by: Will Deacon <will@kernel.org>

2021-04-09 21:09:05 -07:00

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