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=-2.6 required=3.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID, USER_AGENT_NEOMUTT autolearn=ham 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 439FBC6778F for ; Fri, 27 Jul 2018 14:20:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DEB29208AF for ; Fri, 27 Jul 2018 14:20:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=8bytes.org header.i=@8bytes.org header.b="I+3La3LG" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DEB29208AF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732143AbeG0PmL (ORCPT ); Fri, 27 Jul 2018 11:42:11 -0400 Received: from 8bytes.org ([81.169.241.247]:37744 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730376AbeG0PmL (ORCPT ); Fri, 27 Jul 2018 11:42:11 -0400 Received: by theia.8bytes.org (Postfix, from userid 1000) id D47A08F0; Fri, 27 Jul 2018 16:20:01 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=8bytes.org; s=mail-1; t=1532701201; bh=2lYfTsJLJm/0Lpj+5nbdjQfFBFTrA3QlDaP9kzpR5sg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=I+3La3LGlLwMOtQ4J3no5F6cp2zwhn3YD52FIn18q6b9Jh176wmiX+0wFLd9e14SC zGO33JGGP2vEsRel8FN+BCDNc7Z3yRH/hw+v66dx3UHzWOAshXKi/Fa+d8x8Qwb5PO nu5ufjGrvagMO15OOsm14+3F4NfAb0CGVL2VC5J7fi9yTdtlCdxCA9GgawRUJbZQTl kiaNWJsw8rbpHL8lgjZsezIS51ID9C/+UTRu6BLVpy46QJGeCe+xYsACQRNP+IyVLt V5Srd0V5SPUGVQy6SSbJe95eU2BUI9ViT08jHIRWnw6+2RLx8QNJuwdklC55PWztEg D+2GGhBC9Uxgg== Date: Fri, 27 Jul 2018 16:20:01 +0200 From: Joerg Roedel To: Dmitry Osipenko Cc: Will Deacon , Greg Kroah-Hartman , "Rafael J. Wysocki" , Thierry Reding , Jonathan Hunter , Mikko Perttunen , Rob Herring , Frank Rowand , Ben Skeggs , Russell King , Catalin Marinas , Nicolas Chauvet , devicetree@vger.kernel.org, nouveau@lists.freedesktop.org, iommu@lists.linux-foundation.org, dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH v1 0/6] Resolve unwanted DMA backing with IOMMU Message-ID: <20180727142000.76zgficpta473snl@8bytes.org> References: <20180726231624.21084-1-digetx@gmail.com> <20180727082512.lpvmeuvxnw3mpeym@8bytes.org> <20180727090328.GH28088@arm.com> <4164951.xGHfcFJ9uZ@dimapc> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4164951.xGHfcFJ9uZ@dimapc> User-Agent: NeoMutt/20170421 (1.8.2) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jul 27, 2018 at 05:10:22PM +0300, Dmitry Osipenko wrote: > I'm not sure what you guys are meaning by the "firmware", could you elaborate > please? Do you mean the Open Firmware and hence the devicetree or what? Yes, I think the best way to request this is using a device-tree property. Letting the device driver request it is definitly a bad idea. Joerg