linux-kernel - Re: [PATCH v7 0/8] Add new driver for WCSS secure PIL loading

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Message-ID: <aUKC5EuWRzsyrHnz@hu-varada-blr.qualcomm.com>
Date: Wed, 17 Dec 2025 15:46:04 +0530
From: Varadarajan Narayanan <varadarajan.narayanan@....qualcomm.com>
To: george.moussalem@...look.com
Cc: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Manikanta Mylavarapu <quic_mmanikan@...cinc.com>,
        Jassi Brar <jassisinghbrar@...il.com>, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-remoteproc@...r.kernel.org,
        devicetree@...r.kernel.org,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Gokul Sriram Palanisamy <gokul.sriram.p@....qualcomm.com>,
        Gokul Sriram Palanisamy <quic_gokulsri@...cinc.com>,
        Vignesh Viswanathan <vignesh.viswanathan@....qualcomm.com>,
        Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        Krzysztof Kozlowski <krzk@...nel.org>
Subject: Re: [PATCH v7 0/8] Add new driver for WCSS secure PIL loading

Dmitry/George,

> Imported from f20250417061245.497803-1-gokul.sriram.p@....qualcomm.com
> I've resumed Gokul's work as the last submission dates back April 2025.

Thanks for following up on this.

> This series depends on Sricharan's tmel-qmp mailbox driver series v4 [1].

Since Sricharan's tmel-qmp driver is stuck, this patch series will not
get merged. Shall I drop the ipq5424 related patches and portions of
code in the driver and post a new version so that other SoCs are
unblocked. Please let me know.

Thanks
Varada

> - Secure PIL is signed, split firmware images which only TrustZone (TZ)
>   can authenticate and load. Linux kernel will send a request to TZ to
>   authenticate and load the PIL images.
>
> - When secure PIL support was added to the existing wcss PIL driver
>   earlier in [2], Bjorn suggested not to overload the existing WCSS
>   rproc driver, instead post a new driver for PAS based IPQ WCSS driver.
>   This series adds a new secure PIL driver for the same.
>
> - Also adds changes to scm to pass metadata size as required for IPQ5332,
>   reposted from [3].
>
> [1]
> https://patchwork.kernel.org/project/linux-arm-msm/cover/20250327181750.3733881-1-quic_srichara@quicinc.com/
>
> [2]
> https://patchwork.kernel.org/project/linux-arm-msm/patch/1611984013-10201-3-git-send-email-gokulsri@codeaurora.org/
>
> [3]
> https://patchwork.kernel.org/project/linux-arm-msm/patch/20240820055618.267554-6-quic_gokulsri@quicinc.com/

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