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| author | Will Deacon <will@kernel.org> | 2019-12-19 12:03:51 +0000 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2019-12-23 14:06:05 +0100 |
| commit | cd221bd24ff5567bbcc11ec0c303141a7c2b71bf (patch) | |
| tree | 5dfab6e06eeb4b15680540ba69fc2611f4496d82 /drivers/iommu/Kconfig | |
| parent | 7359572e1a5d4280ad87b969b0d30be43ef4989a (diff) | |
| download | lwn-cd221bd24ff5567bbcc11ec0c303141a7c2b71bf.tar.gz lwn-cd221bd24ff5567bbcc11ec0c303141a7c2b71bf.zip | |
iommu/arm-smmu: Allow building as a module
By conditionally dropping support for the legacy binding and exporting
the newly introduced 'arm_smmu_impl_init()' function we can allow the
ARM SMMU driver to be built as a module.
Signed-off-by: Will Deacon <will@kernel.org>
Tested-by: John Garry <john.garry@huawei.com> # smmu v3
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/Kconfig')
| -rw-r--r-- | drivers/iommu/Kconfig | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index 31f0f376ad11..d66ace717cf4 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -356,7 +356,7 @@ config SPAPR_TCE_IOMMU # ARM IOMMU support config ARM_SMMU - bool "ARM Ltd. System MMU (SMMU) Support" + tristate "ARM Ltd. System MMU (SMMU) Support" depends on (ARM64 || ARM) && MMU select IOMMU_API select IOMMU_IO_PGTABLE_LPAE @@ -368,6 +368,18 @@ config ARM_SMMU Say Y here if your SoC includes an IOMMU device implementing the ARM SMMU architecture. +config ARM_SMMU_LEGACY_DT_BINDINGS + bool "Support the legacy \"mmu-masters\" devicetree bindings" + depends on ARM_SMMU=y && OF + help + Support for the badly designed and deprecated "mmu-masters" + devicetree bindings. This allows some DMA masters to attach + to the SMMU but does not provide any support via the DMA API. + If you're lucky, you might be able to get VFIO up and running. + + If you say Y here then you'll make me very sad. Instead, say N + and move your firmware to the utopian future that was 2016. + config ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT bool "Default to disabling bypass on ARM SMMU v1 and v2" depends on ARM_SMMU |