linux-kernel - Re: [PATCH v4 02/13] iommu/arm-smmu-v3: Add smmu_s1_cfg to smmu

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Message-ID: <CAKHBV25+vOroe+prca2ivSH341A8RLHW+shycyKD5z3UWZVgpQ@mail.gmail.com>
Date:   Fri, 14 Jul 2023 00:34:35 +0800
From:   Michael Shavit <mshavit@...gle.com>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     Nicolin Chen <nicolinc@...dia.com>, Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>, jean-philippe@...aro.org,
        baolu.lu@...ux.intel.com, linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 02/13] iommu/arm-smmu-v3: Add smmu_s1_cfg to smmu_master

On Fri, Jul 14, 2023 at 12:16 AM Michael Shavit <mshavit@...gle.com> wrote:
> domains a-la aux-domain). With this change, even attach_dev with a DMA
> or UNMANAGED domain is now just preparing a single entry into this
> common CD table.

I have to correct this part, arm-smmu-v3.c's attach_dev()
implementation does both: it writes to the pasid=0 entry of the
owned_s1_cfg's CD table, and then installs that CD table to the STE.