linux-kernel - Re: [PATCH v3 0/6] Add support for Qualcomm's legacy IOMMU v2

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Date:   Tue, 20 Jun 2023 12:02:16 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Luca Weiss <luca@...tu.xyz>, agross@...nel.org
Cc:     andersson@...nel.org, konrad.dybcio@...aro.org, joro@...tes.org,
        will@...nel.org, robin.murphy@....com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, robdclark@...il.com,
        linux-arm-msm@...r.kernel.org, iommu@...ts.linux.dev,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        marijn.suijten@...ainline.org, kernel@...labora.com,
        a39.skl@...il.com, phone-devel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht,
        Matti Lehtimäki <matti.lehtimaki@...il.com>
Subject: Re: [PATCH v3 0/6] Add support for Qualcomm's legacy IOMMU v2

Il 19/06/23 23:42, Luca Weiss ha scritto:
> On Mittwoch, 22. Februar 2023 10:57:47 CEST AngeloGioacchino Del Regno wrote:
>> Il 15/11/22 11:11, AngeloGioacchino Del Regno ha scritto:
>>> This series adds support for handling "v2" firmware's IOMMU, found
>>> on at least MSM8956 and MSM8976 (some other SoCs also need the same
>>> but I honestly don't remember which ones precisely).
>>>
>>> This is strictly required to get functional IOMMUs on these SoCs.
>>>
>>> I'm sorry for not performing a much needed schema conversion on
>>> qcom,iommu.txt, but I really didn't have time to do that :-(
>>>
>>> This series was tested on Sony Xperia X and X Compact (MSM8956):
>>> ADSP, LPASS, Venus, MSS, MDP and GPU are happy :-)
>>
>> Hello,
>> this series is really old and got sent and resent many times.
>> The first time I've sent this one was .. I think in 2019, then, at the
>> end of 2022, I had some time to actually respin it and send another
>> three versions. It's been 3 long years :-)
>> The third version got the last comments addressed.
>>
>> Since this didn't get any more feedback for 3 months, I'm worried that it
>> will be forgotten again, hence:
>>
>> Is there any more feedback? Anything else to fix?
>> If not, can this be picked, please?
> 
> Hi Angelo,
> 
> there's some open review comments since March now on this series. Since some
> of these patches are also needed for msm8953 and msm8974 IOMMU it would be
> nice if you could respin :)
> 

Hello Luca,

I've just sent a v4, but I'm sorry I forgot to Cc you. Please find it at [1].

[1]: 
https://lore.kernel.org/all/20230620095127.96600-1-angelogioacchino.delregno@collabora.com/

Cheers,
Angelo

> Regards
> Luca
> 
>>
>> Thank you.
>>
>> Best regards,
>> Angelo
>>
>>> Changes in v3:
>>>    - Removed useless FSRRESTORE reset and definition as pointed
>>>    
>>>      out in Robin Murphy's review
>>>    
>>>    - Fixed qcom,iommu.txt changes: squashed MSM8976 compatible
>>>    
>>>      string addition with msm-iommu-v2 generics addition
>>>
>>> Changes in v2:
>>>    - Added back Marijn's notes (sorry man!)
>>>    - Added ARM_SMMU_CB_FSRRESTORE definition
>>>    - Changed context bank reset to properly set FSR and FSRRESTORE
>>>
>>> AngeloGioacchino Del Regno (6):
>>>     dt-bindings: iommu: qcom,iommu: Document qcom,ctx-num property
>>>     iommu/qcom: Use the asid read from device-tree if specified
>>>     iommu/qcom: Properly reset the IOMMU context
>>>     iommu/qcom: Index contexts by asid number to allow asid 0
>>>     dt-bindings: iommu: qcom,iommu: Document QSMMUv2 and MSM8976
>>>     
>>>       compatibles
>>>     
>>>     iommu/qcom: Add support for QSMMUv2 and QSMMU-500 secured contexts
>>>    
>>>    .../devicetree/bindings/iommu/qcom,iommu.txt  |  9 +++
>>>    drivers/iommu/arm/arm-smmu/qcom_iommu.c       | 78 +++++++++++++++----
>>>    2 files changed, 70 insertions(+), 17 deletions(-)
> 
> 
> 
> 
>