On 2020-12-22 00:44, Isaac J. Manjarres wrote:
The SMMU driver depends on the availability of the ARM LPAE and ARM V7S io-pgtable format code to work properly. In preparation
Nit: we don't really depend on v7s - we *can* use it if it's available, address constraints are suitable, and the SMMU implementation actually supports it (many don't), but we can still quite happily not use it even so. LPAE is mandatory in the architecture so that's our only hard requirement, embodied in the kconfig select.
This does mean there may technically still be a corner case involving ARM_SMMU=y and IO_PGTABLE_ARM_V7S=m, but at worst it's now a runtime failure rather than a build error, so unless and until anyone demonstrates that it actually matters I don't feel particularly inclined to give it much thought.
Robin.
for having the io-pgtable formats as modules, add a "pre" dependency with MODULE_SOFTDEP() to ensure that the io-pgtable format modules are loaded before loading the ARM SMMU driver module.
Signed-off-by: Isaac J. Manjarres isaacm@codeaurora.org
drivers/iommu/arm/arm-smmu/arm-smmu.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c index d8c6bfd..a72649f 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c @@ -2351,3 +2351,4 @@ MODULE_DESCRIPTION("IOMMU API for ARM architected SMMU implementations"); MODULE_AUTHOR("Will Deacon will@kernel.org"); MODULE_ALIAS("platform:arm-smmu"); MODULE_LICENSE("GPL v2"); +MODULE_SOFTDEP("pre: io-pgtable-arm io-pgtable-arm-v7s");