linux-kernel - Re: [RFC PATCH net-next 9/9] ethtool: Add ability to flash transceiver modules' firmware

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]

Date: Wed, 31 Jan 2024 17:30:48 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Danielle Ratson <danieller@...dia.com>
Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"edumazet@...gle.com" <edumazet@...gle.com>,
	"kuba@...nel.org" <kuba@...nel.org>,
	"pabeni@...hat.com" <pabeni@...hat.com>,
	"corbet@....net" <corbet@....net>,
	"linux@...linux.org.uk" <linux@...linux.org.uk>,
	"sdf@...gle.com" <sdf@...gle.com>,
	"kory.maincent@...tlin.com" <kory.maincent@...tlin.com>,
	"maxime.chevallier@...tlin.com" <maxime.chevallier@...tlin.com>,
	"vladimir.oltean@....com" <vladimir.oltean@....com>,
	"przemyslaw.kitszel@...el.com" <przemyslaw.kitszel@...el.com>,
	"ahmed.zaki@...el.com" <ahmed.zaki@...el.com>,
	"richardcochran@...il.com" <richardcochran@...il.com>,
	"shayagr@...zon.com" <shayagr@...zon.com>,
	"paul.greenwalt@...el.com" <paul.greenwalt@...el.com>,
	"jiri@...nulli.us" <jiri@...nulli.us>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	mlxsw <mlxsw@...dia.com>, Petr Machata <petrm@...dia.com>,
	Ido Schimmel <idosch@...dia.com>
Subject: Re: [RFC PATCH net-next 9/9] ethtool: Add ability to flash
 transceiver modules' firmware

> > > How big are these firmware blobs?
> > >
> 
> The largest file I came across is 400K.

https://hack-gpon.org/ont-fs-com-gpon-onu-stick-with-mac/

Suggests that some GPON devices have 16MB of flash. Ideally we don't
want to map a 16MB firmware image into the kernel address space. A
high end switch could do it, but a typical OpenWRT 'cable modem' is
likely to have trouble.

     Andrew