powerpc/dma: untangle vio_dma_mapping_ops from dma_iommu_ops

Browse source

vio_dma_mapping_ops currently does a lot of indirect calls through
dma_iommu_ops, which not only make the code harder to follow but are
also expensive in the post-spectre world.  Unwind the indirect calls
by calling the ppc_iommu_* or iommu_* APIs directly applicable, or
just use the dma_iommu_* methods directly where we can.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

...

This commit is contained in:

Christoph Hellwig 2019-02-13 08:01:04 +01:00 • committed by Michael Ellerman

parent fbce251baa

commit a20f507f57

3 changed files with 38 additions and 52 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

arch/powerpc/include/asm/iommu.h

View file

2

arch/powerpc/kernel/dma-iommu.c

View file

87

arch/powerpc/platforms/pseries/vio.c

View file