[PATCH v9 00/12] iommu/arm-smmu-v3: Implement Runtime/System Sleep ops

Jason Gunthorpe jgg at nvidia.com
Tue Aug 25 06:33:42 PDT 2026


On Tue, Jul 28, 2026 at 09:09:16PM +0000, Pranjal Shrivastava wrote:

> [v9]
>  - Replaced atomic_fetch_or_relaxed() with atomic_fetch_or() for
>    correct ordering while asserting the STOP_FLAG
>  - Moved arm_smmu_drain_queues() after the cmdq->lock wait loop in
>    runtime_suspend() as per feedback in v8.
>  - Refactored suspend sequence to use arm_smmu_disable_irqs() and
>    synchronize_irq() for safe GERROR handling.
>  - Fixed an off-by-one error in suspend polling timeouts.
>  - Dropped arm_smmu_cmdq_can_elide() check from inv_range
>  - Renamed arm_smmu_cmdq_can_elide() to arm_smmu_is_active().
>  - Removed redundant bitwise masking from owner_prod reads.
>  - Added comments to explain locking, gating and elision better.
>  - Added comments to explain secondary cmdq draining and gating.
>  - Rebased on arm/smmu/updates

There are alot of scary looking sashiko remarks, are you planning to
resend this with some of them addressed?

Jason



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