linux-kernel - Re: [PATCH] arm64: dts: qcom: ipq5424: Add reserved memory for TF-A

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] [day] [month] [year] [list]

Message-ID: <7d641576-7ec7-46f2-ad53-e0b8b36351d1@oss.qualcomm.com>
Date: Wed, 25 Jun 2025 10:20:57 +0530
From: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        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>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Vignesh Viswanathan <quic_viswanat@...cinc.com>
Subject: Re: [PATCH] arm64: dts: qcom: ipq5424: Add reserved memory for TF-A


On 6/24/2025 6:57 PM, Konrad Dybcio wrote:
> On 6/24/25 12:36 PM, Kathiravan Thirumoorthy wrote:
>> From: Vignesh Viswanathan <quic_viswanat@...cinc.com>
>>
>> IPQ5424 supports both TZ and TF-A as secure software options and various
>> DDR sizes. In most cases, TF-A or TZ is loaded at the same memory
>> location, but in the 256MB DDR configuration TF-A is loaded at a different
>> region.
>>
>> So, add the reserved memory node for TF-A and keep it disabled by default.
>> During bootup, U-Boot will detect which secure software is running and
>> enable or disable the node accordingly.
>>
>> Signed-off-by: Vignesh Viswanathan <quic_viswanat@...cinc.com>
>> Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>
>> ---
> Can the said u-boot simply dynamically add the reservation then?

Yeah it could have been done in U-Boot itself but it wasn't. 256MB DDR 
configuration solution is already shipped out and the stock U-Boot 
enable this node to avoid the random issues.

>
> Konrad