iommu/io-pgtable: Indicate granule for TLB maintenance

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IOMMU hardware with range-based TLB maintenance commands can work
happily with the iova and size arguments passed via the tlb_add_flush
callback, but for IOMMUs which require separate commands per entry in
the range, it is not straightforward to infer the necessary granularity
when it comes to issuing the actual commands.

Add an additional argument indicating the granularity for the benefit
of drivers needing to know, and update the ARM LPAE code appropriately
(for non-leaf invalidations we currently just assume the worst-case
page granularity rather than walking the table to check).

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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This commit is contained in:

Robin Murphy 2015-12-07 18:18:53 +00:00 • committed by Will Deacon

parent 2eb97c7861

commit 06c610e8f3

5 changed files with 21 additions and 18 deletions

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2

drivers/iommu/arm-smmu-v3.c

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2

drivers/iommu/arm-smmu.c

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27

drivers/iommu/io-pgtable-arm.c

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4

drivers/iommu/io-pgtable.h

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4

drivers/iommu/ipmmu-vmsa.c

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