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authorWill Deacon <will@kernel.org>2019-12-19 12:03:51 +0000
committerJoerg Roedel <jroedel@suse.de>2019-12-23 14:06:05 +0100
commitcd221bd24ff5567bbcc11ec0c303141a7c2b71bf (patch)
tree5dfab6e06eeb4b15680540ba69fc2611f4496d82 /drivers/iommu/Kconfig
parent7359572e1a5d4280ad87b969b0d30be43ef4989a (diff)
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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/Kconfig14
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