iommu/arm-smmu-v3: Factor out CMDQ batch force-sync conditions

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arm_smmu_cmdq_batch_add_cmd_p() carries two distinct reasons for
flushing the current batch with a CMD_SYNC before appending the
new command:

  - The batch's pre-assigned cmdq does not support the new command.
  - The Arm erratum 2812531 workaround (ARM_SMMU_OPT_CMDQ_FORCE_SYNC)
    forces a SYNC at one entry before the batch is full.

Lift those checks into a new arm_smmu_cmdq_batch_force_sync() helper
so that adding another force-sync condition becomes a one-line
addition. No functional change.

Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Ashish Mhetre <amhetre@nvidia.com>
Signed-off-by: Will Deacon <will@kernel.org>

...

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Nicolin Chen 2026-07-26 08:19:01 +00:00 • committed by Will Deacon

parent 9ff145a25c

commit 097bf4a02f

1 changed files with 17 additions and 6 deletions

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drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c

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