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iommu/dma: Clean up Kconfig

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Although iommu-dma is a per-architecture chonce, that is currently
implemented in a rather haphazard way. Selecting from the arch Kconfig
was the original logical approach, but is complicated by having to
manage dependencies; conversely, selecting from drivers ends up hiding
the architecture dependency *too* well. Instead, let's just have it
enable itself automatically when IOMMU API support is enabled for the
relevant architectures. It can't get much clearer than that.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/2e33c8bc2b1bb478157b7964bfed976cb7466139.1660668998.git.robin.murphy@arm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Robin Murphy
2022-08-16 18:28:03 +01:00
committed by Joerg Roedel
parent 29e932295b
commit de9f8a91eb
4 changed files with 1 additions and 5 deletions
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3
drivers/iommu/Kconfig
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@@ -137,7 +137,7 @@ config OF_IOMMU
# IOMMU-agnostic DMA-mapping layer
config IOMMU_DMA
bool
def_bool ARM64 || IA64 || X86
select DMA_OPS
select IOMMU_API
select IOMMU_IOVA
@@ -476,7 +476,6 @@ config VIRTIO_IOMMU
depends on VIRTIO
depends on (ARM64 || X86)
select IOMMU_API
select IOMMU_DMA
select INTERVAL_TREE
select ACPI_VIOT if ACPI
help