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

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Message-ID: <20231012145025.GB12374@willie-the-truck>
Date:   Thu, 12 Oct 2023 15:50:26 +0100
From:   Will Deacon <will@...nel.org>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     Michael Shavit <mshavit@...gle.com>,
        Joerg Roedel <joro@...tes.org>, 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 Wed, Oct 11, 2023 at 08:48:48PM -0300, Jason Gunthorpe wrote:
> 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?

On my list to look at today!

Will