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 X-Spam-Level: X-Spam-Status: No, score=-5.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2979C433E5 for ; Fri, 26 Mar 2021 10:57:18 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1F14761A1E for ; Fri, 26 Mar 2021 10:57:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1F14761A1E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=7d/O5ekcyHQVNB0wC75QNejIBBjyDcldUMC8gBFDLIA=; b=axv+5XP+OZYBAcO2Q47cEjdOj 1OqjUAVLEiVFQoW8ojUuEVRMtwBo7NSteROWweZUeymwZlBzmA4gjtmIrJbO7CuecZ+Xhy6NmJFL+ n0UDGCHmuZugMNLJtgDdFDrhr61PHtGfGJY4xGpyxsm0g2fMaqRKULEOn+3zT3xIpdMpDZ7msWdLn 8HkWMBXqsgyHg6WJSlfV9a0T6LNI22mMiY3j3mtxmzD0OmIZmav+ZSIr4QQuZEogMCncscPSqzM20 RihrbusKzfPh7PzT625WZwMSSAvRencGExhZbgmgKetJUWWaMdG5s+PIDAiiSUupc/6xXZ3XLA0TP i89Hb7jRQ==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lPk8B-003MAO-AP; Fri, 26 Mar 2021 10:55:55 +0000 Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lPk86-003M9i-2A for linux-arm-kernel@lists.infradead.org; Fri, 26 Mar 2021 10:55:52 +0000 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 0AB53143D; Fri, 26 Mar 2021 03:55:49 -0700 (PDT) Received: from bogus (unknown [10.57.54.194]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7AC2D3F7D7; Fri, 26 Mar 2021 03:55:47 -0700 (PDT) Date: Fri, 26 Mar 2021 10:55:45 +0000 From: Sudeep Holla To: Sumit Garg Cc: linux-arm-kernel , Devicetree List , Trilok Soni , arve@android.com, Andrew Walbran , David Hartley , Achin Gupta , Jens Wiklander , Arunachalam Ganapathy , Marc Bonnici Subject: Re: [PATCH v5 1/7] dt-bindings: Arm: Add Firmware Framework for Armv8-A (FF-A) binding Message-ID: <20210326105545.44rdcbrumg3q6i7y@bogus> References: <20210325143255.1532452-1-sudeep.holla@arm.com> <20210325143255.1532452-2-sudeep.holla@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20171215 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210326_105550_272541_A96BBE23 X-CRM114-Status: GOOD ( 15.47 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Mar 26, 2021 at 10:35:23AM +0530, Sumit Garg wrote: > Hi Sudeep, > > Apologies for catching up late on this patch-set. > > On Thu, 25 Mar 2021 at 20:05, Sudeep Holla wrote: > > > > Since the FF-A v1.0 specification doesn't list the UUID of all the > > partitions in the discovery API, we need to specify the UUID of the > > partitions that need to be accessed by drivers within the kernel. > > > > Wouldn't we be able to implement auto-discovery of ffa partitions? I > think enumeration of ffa partitions on FFA bus should be quite similar > to enumeration of TAs on TEE bus (see [1]). Otherwise we need to put > these redundant DT entries for every ffa partition which IMHO would > bloat up device trees for every platform. > Any suggestions on how to ? Clearly spec doesn't have that provision, I had raised this point in the past. Jens has similar concern and he did ask the same[1]. As I replied to him in that thread[2]. I am open to suggestion on how to auto-discover, currently as I see spec doesn't support it. -- Regards, Sudeep [1] https://lore.kernel.org/linux-arm-kernel/20201216134659.GA4146223@jade/ [2] https://lore.kernel.org/linux-arm-kernel/20210113092236.pnabzaufzuzwprmw@bogus/ _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel