linux-kernel - Re: [PATCH 1/1] iommu/arm-smmu: Implement qcom,skip-init

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:   Sat, 4 Jul 2020 15:20:04 +0200
From:   Konrad Dybcio <konradybcio@...il.com>
To:     Will Deacon <will@...nel.org>
Cc:     skrzynka@...radybcio.pl, Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux-foundation.org,
        DTML <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        jcrouse@...eaurora.org, john.stultz@...aro.org
Subject: Re: [PATCH 1/1] iommu/arm-smmu: Implement qcom,skip-init

> It would probably be better to know _which_ context banks we shouldn't
> touch, no? Otherwise what happens to the others?

> Do we not need to worry about the SMRs as well?

This was mimicked from CAF (think [1]) and the SMMUs don't make the
hypervisor angry anymore, so I wouldn't be too picky on that if it works..


[1] https://github.com/sonyxperiadev/kernel/blob/aosp/LA.UM.7.1.r1/drivers/iommu/arm-smmu.c#L4104-L4109

Regards
Konrad