linux-kernel - Re: [PATCH v9 1/4] rpmb: add Replay Protected Memory Block (RPMB) subsystem

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Message-ID: <2024082403-preseason-preacher-a709@gregkh>
Date: Sat, 24 Aug 2024 11:13:12 +0800
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Jens Wiklander <jens.wiklander@...aro.org>
Cc: linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org,
	op-tee@...ts.trustedfirmware.org,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Shyam Saini <shyamsaini@...ux.microsoft.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Jerome Forissier <jerome.forissier@...aro.org>,
	Sumit Garg <sumit.garg@...aro.org>,
	Ilias Apalodimas <ilias.apalodimas@...aro.org>,
	Bart Van Assche <bvanassche@....org>,
	Randy Dunlap <rdunlap@...radead.org>,
	Ard Biesheuvel <ardb@...nel.org>, Arnd Bergmann <arnd@...db.de>,
	Manuel Traut <manut@...ka.net>,
	Mikko Rapeli <mikko.rapeli@...aro.org>,
	Tomas Winkler <tomas.winkler@...el.com>,
	Alex Bennée <alex.bennee@...aro.org>
Subject: Re: [PATCH v9 1/4] rpmb: add Replay Protected Memory Block (RPMB)
 subsystem

On Wed, Aug 14, 2024 at 05:35:55PM +0200, Jens Wiklander wrote:
> A number of storage technologies support a specialised hardware
> partition designed to be resistant to replay attacks. The underlying
> HW protocols differ but the operations are common. The RPMB partition
> cannot be accessed via standard block layer, but by a set of specific
> RPMB commands. Such a partition provides authenticated and replay
> protected access, hence suitable as a secure storage.
> 
> The initial aim of this patch is to provide a simple RPMB driver
> interface which can be accessed by the optee driver to facilitate early
> RPMB access to OP-TEE OS (secure OS) during the boot time.
> 
> A TEE device driver can claim the RPMB interface, for example, via
> rpmb_interface_register() or rpmb_dev_find_device(). The RPMB driver
> provides a callback to route RPMB frames to the RPMB device accessible
> via rpmb_route_frames().
> 
> The detailed operation of implementing the access is left to the TEE
> device driver itself.
> 
> Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
> Signed-off-by: Alex Bennée <alex.bennee@...aro.org>
> Signed-off-by: Shyam Saini <shyamsaini@...ux.microsoft.com>
> Signed-off-by: Jens Wiklander <jens.wiklander@...aro.org>
> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
> Tested-by: Manuel Traut <manut@...ka.net>
> ---

Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>