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iommu/arm-smmu-v3: Update comment about STE liveness

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Update the comment to reflect the fact that the STE is not always
installed. arm_smmu_domain_finalise_s1 intentionnaly calls
arm_smmu_write_ctx_desc while the STE is not installed.

Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Michael Shavit <mshavit@google.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Link: https://lore.kernel.org/r/20230915211705.v8.8.I7a8beb615e2520ad395d96df94b9ab9708ee0d9c@changeid
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Michael Shavit 2023-09-15 21:17:39 +08:00 committed by Will Deacon
parent 5e14313df2
commit 6032f58498
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
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@ -1091,7 +1091,7 @@ int arm_smmu_write_ctx_desc(struct arm_smmu_master *master, int ssid,
cdptr[3] = cpu_to_le64(cd->mair);
/*
* STE is live, and the SMMU might read dwords of this CD in any
* STE may be live, and the SMMU might read dwords of this CD in any
* order. Ensure that it observes valid values before reading
* V=1.
*/