linux-kernel - Re: [PATCH v8 0/9] Refactor the SMMU's CD table ownership

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Message-ID: <20231011234848.GA257246@nvidia.com>
Date:   Wed, 11 Oct 2023 20:48:48 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Michael Shavit <mshavit@...gle.com>, will@...nel.org,
        Joerg Roedel <joro@...tes.org>
Cc:     iommu@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, nicolinc@...dia.com,
        jean-philippe@...aro.org, robin.murphy@....com,
        Alistair Popple <apopple@...dia.com>,
        Dawei Li <set_pte_at@...look.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        Kevin Tian <kevin.tian@...el.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Tomas Krcka <krckatom@...zon.de>
Subject: Re: [PATCH v8 0/9] Refactor the SMMU's CD table ownership

On Fri, Sep 15, 2023 at 09:17:31PM +0800, Michael Shavit wrote:
> 
> Hi all,
> 
> This series refactors stage 1 domains so that they describe a single CD
> entry. These entries are now inserted into a CD table that is owned by
> the arm_smmu_master instead of the domain.
> This is conceptually cleaner and unblocks other features, such as
> attaching domains with PASID (for unmanaged/dma domains).
> 
> This patch series was originally part of a larger patch series that
> implemented the set_dev_pasid callback for non-SVA domains but is now
> split into a distinct series.
> 
> This patch series is also available on gerrit with Jean's SMMU test
> engine patches cherry-picked on top for testing:
> https://linux-review.googlesource.com/c/linux/kernel/git/torvalds/linux/+/24742/16
> 
> Thanks,
> Michael Shavit
> 
> Michael Shavit (9):
>   iommu/arm-smmu-v3: Move ctx_desc out of s1_cfg
>   iommu/arm-smmu-v3: Replace s1_cfg with cdtab_cfg
>   iommu/arm-smmu-v3: Encapsulate ctx_desc_cfg init in alloc_cd_tables
>   iommu/arm-smmu-v3: move stall_enabled to the cd table
>   iommu/arm-smmu-v3: Refactor write_ctx_desc
>   iommu/arm-smmu-v3: Move CD table to arm_smmu_master
>   iommu/arm-smmu-v3: Cleanup arm_smmu_domain_finalise
>   iommu/arm-smmu-v3: Update comment about STE liveness
>   iommu/arm-smmu-v3: Rename cdcfg to cd_table

Will, can you take this please?

Thanks,
Jason