linux-kernel - Re: [PATCH v12 0/7] MT8188 IOMMU SUPPORT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 25 Jul 2023 15:59:59 +0800
From:   Fei Shao <fshao@...omium.org>
To:     Yong Wu <yong.wu@...iatek.com>
Cc:     Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Robin Murphy <robin.murphy@....com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, iommu@...ts.linux.dev,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        mingyuan.ma@...iatek.com, yf.wang@...iatek.com,
        jianjiao.zeng@...iatek.com, chengci.xu@...iatek.com
Subject: Re: [PATCH v12 0/7] MT8188 IOMMU SUPPORT

On Fri, Jun 2, 2023 at 5:03 PM Yong Wu <yong.wu@...iatek.com> wrote:
>
> MT8188 have 3 IOMMU HWs. 2 IOMMU HW is for multimedia, and 1 IOMMU HW
> is for infra-master, like PCIe.
>
> About the 2 MM IOMMU HW, the connection could be something like this:
>
>         IOMMU(VDO)          IOMMU(VPP)
>            |                   |
>       SMI_COMMON(VDO)      SMI_COMMON(VPP)
>       ---------------     ----------------
>       |      |   ...      |      |     ...
>     larb0 larb2  ...    larb1 larb3    ...
>
> INFRA IOMMU does not have SMI, the master connects to IOMMU directly.
>
> Although multiple banks supported in MT8188, we only use one of them,
> which means PCIe is put in bank0 of INFRA IOMMU.
>
> So we have two pgtable for MT8188, specifically, these two MM IOMMU HW
> share a pgtable while INFRA IOMMU HW use a independent pgtable.
>
> Another change is that we add some SMC command for INFRA master to
> enable INFRA IOMMU in ATF considering security concerns.
>
> We also adjust the flow of mtk_iommu_config to reduce indention.

A friendly ping - this series was reviewed, but I'm not sure if it's
still on the radar today.
This can be cleanly applied on top of next-20230725.

To give more confidence, I also tested the basic multimedia and infra
functionalities on my MT8188 with this series, so

Tested-by: Fei Shao <fshao@...omium.org>

to the entire v12 series.

Regards,
Fei