linux-kernel - Re: [PATCH v7 6/9] iommu/arm-smmu-v3: Move CD table to arm_smmu

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Date:   Thu, 31 Aug 2023 15:32:46 -0700
From:   Nicolin Chen <nicolinc@...dia.com>
To:     Michael Shavit <mshavit@...gle.com>
CC:     <iommu@...ts.linux.dev>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <will@...nel.org>,
        <robin.murphy@....com>, <jean-philippe@...aro.org>,
        <jgg@...dia.com>, Jason Gunthorpe <jgg@...pe.ca>,
        Joerg Roedel <joro@...tes.org>,
        Kevin Tian <kevin.tian@...el.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Yicong Yang <yangyicong@...ilicon.com>
Subject: Re: [PATCH v7 6/9] iommu/arm-smmu-v3: Move CD table to
 arm_smmu_master

On Fri, Sep 01, 2023 at 01:44:35AM +0800, Michael Shavit wrote:

> With this change, each master will now own its own CD table instead of
> sharing one with other masters attached to the same domain. Attaching a
> stage 1 domain installs CD entries into the master's CD table. SVA
> writes its CD entries into each master's CD table if the domain is
> shared across masters.
> 
> Also add the device to the devices list before writing the CD to the
> table so that SVA will know that the CD needs to be re-written to this
> device's CD table as well if it decides to update the CD's ASID
> concurrently with this function.
> 
> Tested-by: Nicolin Chen <nicolinc@...dia.com>
> Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
> Signed-off-by: Michael Shavit <mshavit@...gle.com>
 
Reviewed-by: Nicolin Chen <nicolinc@...dia.com>