This is the result of the discussion on removing split. We agreed that split is not required, and no application should ask for anything that would not unmap a full large IOPTE. Instead of split the two ARM drivers will now WARN_ON and return 0. This is in contrast to what several other drivers do of removing the whole IOPTE and returning 0. The kdoc is updated to describe this. v3: - Remove selftest code too - Fix copy/paste error in iommu_unmap kdoc v2: https://patch.msgid.link/r/0-v2-fd55d00a60b2+c69-arm_no_split_jgg@xxxxxxxxxx - Use WARN_ON instead of duplicating AMD behavior - Add arm-v7s patch - Write a kdoc for iommu_unmap() v1: https://patch.msgid.link/r/0-v1-8c5f369ec2e5+75-arm_no_split_jgg@xxxxxxxxxx Jason Gunthorpe (3): iommu/io-pgtable-arm: Remove split on unmap behavior iommu/io-pgtable-arm-v7s: Remove split on unmap behavior iommu: Add a kdoc to iommu_unmap() drivers/iommu/io-pgtable-arm-v7s.c | 146 +---------------------------- drivers/iommu/io-pgtable-arm.c | 81 +--------------- drivers/iommu/iommu.c | 14 +++ 3 files changed, 21 insertions(+), 220 deletions(-) base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 -- 2.43.0
