linux-kernel - Re: [PATCH v9 1/7] iommu/arm-smmu-v3: Explicitly set smmu

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Message-ID: <aXNEPTBNGq7sK9Bz@google.com>
Date: Fri, 23 Jan 2026 09:49:49 +0000
From: Pranjal Shrivastava <praan@...gle.com>
To: Nicolin Chen <nicolinc@...dia.com>
Cc: will@...nel.org, jean-philippe@...aro.org, robin.murphy@....com,
	joro@...tes.org, jgg@...dia.com, balbirs@...dia.com,
	miko.lenczewski@....com, peterz@...radead.org, kevin.tian@...el.com,
	linux-arm-kernel@...ts.infradead.org, iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v9 1/7] iommu/arm-smmu-v3: Explicitly set
 smmu_domain->stage for SVA

On Fri, Dec 19, 2025 at 12:11:23PM -0800, Nicolin Chen wrote:
> Both the ARM_SMMU_DOMAIN_S1 case and the SVA case use ASID, requiring ASID
> based invalidation commands to flush the TLB.
> 
> Define an ARM_SMMU_DOMAIN_SVA to make the SVA case clear to share the same
> path with the ARM_SMMU_DOMAIN_S1 case, which will be a part of the routine
> to build a new per-domain invalidation array.
> 
> There is no function change.
> 
> Suggested-by: Jason Gunthorpe <jgg@...dia.com>
> Acked-by: Balbir Singh <balbirs@...dia.com>
> Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
> Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
> ---
>  drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h     | 1 +
>  drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 1 +
>  drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c     | 3 +++
>  3 files changed, 5 insertions(+)
> 

Reviewed-by: Pranjal Shrivastava <praan@...gle.com>

Thanks,
Praan