linux-kernel - Re: [PATCH 1/4] arm64: dts: mediatek: mt7622: add 'serial' cell to efuse

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]

Message-ID: <aMqImGmz0uf_aTUR@pidgin.makrotopia.org>
Date: Wed, 17 Sep 2025 11:08:24 +0100
From: Daniel Golle <daniel@...rotopia.org>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH 1/4] arm64: dts: mediatek: mt7622: add 'serial' cell to
 efuse

On Wed, Sep 17, 2025 at 11:06:13AM +0200, AngeloGioacchino Del Regno wrote:
> Il 17/09/25 01:05, Daniel Golle ha scritto:
> > The efuse of the MediaTek MT7622 contains an 8-byte unique identifier.
> > Add a 'serial' cell covering those 8 bytes to the nvmem defininition of
> > the efuse to allow easy access from userspace, eg. to generate a
> > persistent random MAC address on boards like the BananaPi R64 which
> > doesn't have any factory-assigned addresses.
> 
> Sorry, but I don't get why this is named "serial" and not "soc-uuid".
> 
> Care to explain?

I don't have documentation covering the efuse content but only got this
information on an informal way:

https://forum.banana-pi.org/t/bpi-r3-serial-number/14556/10?u=dangowrt

Either name is fine with me, I thought of it as "serial number", but
obviously "soc-uuid" works fine, too.
I can change it to that and send v2 tonight.