netdev - Re: [RFC net-next 1/7] net/ism: Create net/ism

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Message-ID: <e379f0dd-8ad0-4617-9b24-0fa4756d30ea@lunn.ch>
Date: Thu, 16 Jan 2025 21:08:22 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Alexandra Winter <wintera@...ux.ibm.com>
Cc: Wenjia Zhang <wenjia@...ux.ibm.com>, Jan Karcher <jaka@...ux.ibm.com>,
	Gerd Bayer <gbayer@...ux.ibm.com>,
	Halil Pasic <pasic@...ux.ibm.com>,
	"D. Wythe" <alibuda@...ux.alibaba.com>,
	Tony Lu <tonylu@...ux.alibaba.com>,
	Wen Gu <guwen@...ux.alibaba.com>,
	Peter Oberparleiter <oberpar@...ux.ibm.com>,
	David Miller <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	Julian Ruess <julianr@...ux.ibm.com>,
	Niklas Schnelle <schnelle@...ux.ibm.com>,
	Thorsten Winkler <twinkler@...ux.ibm.com>, netdev@...r.kernel.org,
	linux-s390@...r.kernel.org, Heiko Carstens <hca@...ux.ibm.com>,
	Vasily Gorbik <gor@...ux.ibm.com>,
	Alexander Gordeev <agordeev@...ux.ibm.com>,
	Christian Borntraeger <borntraeger@...ux.ibm.com>,
	Sven Schnelle <svens@...ux.ibm.com>,
	Simon Horman <horms@...nel.org>
Subject: Re: [RFC net-next 1/7] net/ism: Create net/ism

> +ISM (INTERNAL SHARED MEMORY)
> +M:	Alexandra Winter <wintera@...ux.ibm.com>
> +L:	netdev@...r.kernel.org
> +S:	Supported
> +F:	include/linux/ism.h
> +F:	net/ism/

Is there any high level documentation about this?

A while back, TI was trying to upstream something for one of there
SoCs. It was a multi CPU system, with not all CPUs used for SMP, but
one or two kept for management and real time tasks, not even running
Linux. They had a block of shared memory used for communication
between the CPUs/OSes, along with rproc. They layered an ethernet
driver on top of this, with buffers for frames in the shared memory.

Could ISM be used for something like this?

	Andrew