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iommu/arm-smmu-v3: Consolidate clearing a CD table entry

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A cleared entry is all 0's. Make arm_smmu_clear_cd() do this sequence.

If we are clearing an entry and for some reason it is not already
allocated in the CD table then something has gone wrong.

Remove case (5) from arm_smmu_write_ctx_desc().

Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Michael Shavit <mshavit@google.com>
Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Moritz Fischer <moritzf@google.com>
Reviewed-by: Mostafa Saleh <smostafa@google.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/4-v9-5040dc602008+177d7-smmuv3_newapi_p2_jgg@nvidia.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Jason Gunthorpe 2024-04-30 14:21:36 -03:00 • committed by Will Deacon
commit af8f0b83ea
3 changed files with 18 additions and 11 deletions
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