Re: [PATCH v7 6/7] iommu/arm-smmu-v3: Add arm_smmu_invs based arm_smmu_domain_inv_range()

[Nicolin Chen]

On Tue, Dec 16, 2025 at 10:15:11AM -0400, Jason Gunthorpe wrote:
> This also has a pre-existing dma_wmb(), a fuller chart would be like this:
> 
>    arm_smmu_domain_inv_range() 		arm_smmu_install_new_domain_invs()
>  
>      [W] IOPTE				  [Wrel] smmu_domain->invs
>      smp_mb()				  smp_mb()  <--- arm_smmu_install_new_domain_invs()
> 					  [build the STE]
> 					  [post the STE]
> 					  dma_wmb() <--- arm_smmu_cmdq_issue_cmdlist()
>                                           Doorbell Write to Device
>      [Lacq] smmu_domain->invs		  [L] IOPTE via DMA
> 
> Nicolin, please elabortate more of these details in the comment.

Ack. I will add the chart above.

Thanks
Nicolin