linux-kernel - Re: [PATCH v1 1/5] iommu/arm-smmu-v3: Move cdtable to arm_smmu

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Message-ID: <CAKHBV24d3At7aFBu8-ZT+JHxepS0YP7LsN6Msw+oc=cfUtG5OA@mail.gmail.com>
Date:   Fri, 12 May 2023 00:27:33 +0800
From:   Michael Shavit <mshavit@...gle.com>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>, jean-philippe@...aro.org,
        nicolinc@...dia.com, baolu.lu@...ux.intel.com,
        linux-arm-kernel@...ts.infradead.org, iommu@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/5] iommu/arm-smmu-v3: Move cdtable to arm_smmu_master

On Thu, May 11, 2023 at 5:15 AM Jason Gunthorpe <jgg@...dia.com> wrote:
> As per my remark on the cover letter this seems a bit confusing
> description, but the idea that the CD Table for kernel owned PASID
> list is placed in the 'struct arm_smmu_master' does make sense to me

Ack; glad to hear the idea is well received. I'll rephrase commit
messages for v2.

> This patch seems very big, is there any way to break it into smaller
> steps?

I can add a preparatory patch that defines and allocates the
arm_smmu_master's cd table before this patch starts writing to that cd
table instead of the smmu_domain owned cd table. This doesn't cut down
the patch's size by a significant amount but it's a start. I'll try to
think about it some more but a lot of the other changes in this patch
are pretty tightly coupled.