From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 31671C433EF for ; Thu, 12 May 2022 14:04:51 +0000 (UTC) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id A0B1B818A3; Thu, 12 May 2022 16:04:49 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Received: by phobos.denx.de (Postfix, from userid 109) id E40FE831CA; Thu, 12 May 2022 16:04:47 +0200 (CEST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by phobos.denx.de (Postfix) with ESMTP id 7577380885 for ; Thu, 12 May 2022 16:04:44 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=abdellatif.elkhlifi@arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id ABCDA106F; Thu, 12 May 2022 07:04:43 -0700 (PDT) Received: from e121910.cambridge.arm.com (e121910.cambridge.arm.com [10.1.39.168]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 929653F73D; Thu, 12 May 2022 07:04:41 -0700 (PDT) Date: Thu, 12 May 2022 15:04:38 +0100 From: Abdellatif El Khlifi To: Tom Rini Cc: u-boot@lists.denx.de, sudeep.holla@arm.com, achin.gupta@arm.com, ilias.apalodimas@linaro.org, robh@kernel.org, sjg@chromium.org, vishnu.banavath@arm.com, xueliang.zhong@arm.com, nd@arm.com Subject: Re: [PATCH v2 0/6] introduce Arm FF-A support Message-ID: <20220512140438.GA817@e121910.cambridge.arm.com> References: <20220413172943.rvvxrsl5ukxy7xkg@bogus> <20220415122803.16666-1-abdellatif.elkhlifi@arm.com> <20220415154325.GY14282@bill-the-cat> <20220509105514.GA4201@e121910.cambridge.arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220509105514.GA4201@e121910.cambridge.arm.com> User-Agent: Mutt/1.9.4 (2018-02-28) X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.5 at phobos.denx.de X-Virus-Status: Clean On Mon, May 09, 2022 at 11:55:14AM +0100, Abdellatif El Khlifi wrote: > On Fri, Apr 15, 2022 at 11:43:25AM -0400, Tom Rini wrote: > > On Fri, Apr 15, 2022 at 01:27:57PM +0100, abdellatif.elkhlifi@arm.com wrote: > > > > > From: Abdellatif El Khlifi > > > > > > This patchset adds support for Arm FF-A (Arm Firmware Framework for Armv8-A v1.0). > > > > > > FF-A support is generic by design and can be used by any Arm platform. > > > > > > The features added are as follows: > > > > > > 1/ FF-A bus driver > > > 2/ armffa command > > > 3/ FF-A Sandbox driver > > > 4/ FF-A Sandbox test cases > > > 5/ FF-A MM communication > > > > > > The suggested design considers FF-A as a discoverable bus. > > > The Secure World is considered as one entity to communicate with using the FF-A bus. > > > FF-A communication is handled by one device and one instance (the bus). > > > This FF-A driver takes care of all the interactions between Normal world > > > and Secure World. > > > > > > The Secure World firmware runs under TrustZone HW (such as Optee). The same approach was followed in the > > > FF-A driver in Linux kernel (https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/firmware/arm_ffa/bus.c?h=v5.15#n211)) > > > > > > Cc: Tom Rini > > > Cc: Rob Herring > > > Cc: Ilias Apalodimas > > > Cc: Achin Gupta > > > Cc: Simon Glass > > > Cc: Vishnu Banavath > > > > I don't see a changelog compared with v1. Are any of the comments there > > addressed? Thanks. > > > > -- > > Tom > > Thanks Tom. I'll add a changelog for future versions. > > The current Changelog: > > Changelog: > =============== > v2 (15 Apr 2022) > * Make FF-A bus discoverable (remove device tree support, bind and probe FF-A device using device_bind and device_probe) > > v1 (29 Mar 2022) > * FF-A bus driver with device tree support > * armffa command > * FF-A Sandbox driver > * FF-A Sandbox test cases > * FF-A MM communication > Hello guys, gentle ping, any feedback about the implementation of FF-A as a discoverable bus ?