linux-kernel - Re: [PATCH v3 00/23] arm64: dts: qcom: Fix remoteproc memory base and length

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Message-ID: <94a6b2ba-fa52-42d0-a60d-9dc31e37057c@quicinc.com>
Date: Mon, 23 Dec 2024 17:21:02 +0800
From: "Aiqun(Maria) Yu" <quic_aiquny@...cinc.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Bjorn Andersson
	<andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        Dmitry Baryshkov
	<dmitry.baryshkov@...aro.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Abel Vesa <abel.vesa@...aro.org>, Sibi Sankar <quic_sibis@...cinc.com>,
        "Luca
 Weiss" <luca.weiss@...rphone.com>
CC: <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <stable@...r.kernel.org>,
        Konrad Dybcio
	<konrad.dybcio@....qualcomm.com>
Subject: Re: [PATCH v3 00/23] arm64: dts: qcom: Fix remoteproc memory base and
 length

On 12/13/2024 10:53 PM, Krzysztof Kozlowski wrote:
> Changes in v3:
> - Add Rb tags
> - Add four new patches (at the end) for sdx75 and sm6115
> - Link to v2: https://lore.kernel.org/r/20241209-dts-qcom-cdsp-mpss-base-address-v2-0-d85a3bd5cced@linaro.org
> 
> Changes in v2:
> - arm64: dts: qcom: x1e80100: Fix ADSP...:
>   Commit msg corrections, second paragraph (Johan)
> - Add tags
> - Link to v1: https://lore.kernel.org/r/20241206-dts-qcom-cdsp-mpss-base-address-v1-0-2f349e4d5a63@linaro.org
> 
> Konrad pointed out during SM8750 review, that numbers are odd, so I
> looked at datasheets and downstream DTS for all previous platforms.
> 
> Most numbers are odd.
> 
> Older platforms like SM8150, SM8250, SC7280, SC8180X seem fine. I could
> not check few like SDX75 or SM6115, due to lack of access to datasheets.
> 
> SM8350, SM8450, SM8550 tested on hardware. Others not, but I don't
> expect any failures because PAS drivers do not use the address space.
> Which also explains why odd numbers did not result in any failures.

In my opinion, the "QCOM_Q6V5_PAS" based Peripheral Authentication
platforms may have the register information completely removed.

There are two types of Peripheral Authentication supported:
  "QCOM_Q6V5_MSS" (self-authenticating)
  "QCOM_Q6V5_PAS" (trust-zone based Authentication)
For "QCOM_Q6V5_PAS" based Peripheral Authentication platforms, use SCM
calls instead of the register-based mechanism. So it is no need to
expose the PUB reg addresses for those platforms.

-- 
Thx and BRs,
Aiqun(Maria) Yu