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=-3.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS 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 96776C4332D for ; Fri, 20 Mar 2020 15:06:43 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (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 48BDD2072C for ; Fri, 20 Mar 2020 15:06:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="ZzOLV/nb" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 48BDD2072C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 48kRv40bNbzDqmd for ; Sat, 21 Mar 2020 02:06:40 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linuxfoundation.org (client-ip=198.145.29.99; helo=mail.kernel.org; envelope-from=gregkh@linuxfoundation.org; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=default header.b=ZzOLV/nb; dkim-atps=neutral Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 48kRny4qkzzDsTN for ; Sat, 21 Mar 2020 02:02:12 +1100 (AEDT) Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D7F7720714; Fri, 20 Mar 2020 15:02:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584716530; bh=abV8/ZN//3YrBYbpASQEcaHQnh62HmxBKB67ullzIGY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ZzOLV/nbV2X1/L58dQ3IkZlLSycU8DKOQKketOO4IOKdxd2U2/rYT7SkwTah5EjVJ iQx82GFrYHrxhgi6UBGnAO02z0cmJpplNHGbUdy4HeQi3Ds72dU53yoowTfDpIdU5U OPE+lL5UAbxawylQefAwtClInfYGFVljyJcPApTM= Date: Fri, 20 Mar 2020 16:02:08 +0100 From: Greg Kroah-Hartman To: Christoph Hellwig Subject: Re: [PATCH 1/2] dma-mapping: add a dma_ops_bypass flag to struct device Message-ID: <20200320150208.GA761915@kroah.com> References: <20200320141640.366360-1-hch@lst.de> <20200320141640.366360-2-hch@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200320141640.366360-2-hch@lst.de> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alexey Kardashevskiy , linuxppc-dev@lists.ozlabs.org, Joerg Roedel , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Robin Murphy , Lu Baolu Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Fri, Mar 20, 2020 at 03:16:39PM +0100, Christoph Hellwig wrote: > Several IOMMU drivers have a bypass mode where they can use a direct > mapping if the devices DMA mask is large enough. Add generic support > to the core dma-mapping code to do that to switch those drivers to > a common solution. > > Signed-off-by: Christoph Hellwig > --- > include/linux/device.h | 6 ++++++ > include/linux/dma-mapping.h | 30 ++++++++++++++++++------------ > kernel/dma/mapping.c | 36 +++++++++++++++++++++++++++--------- > 3 files changed, 51 insertions(+), 21 deletions(-) Reviewed-by: Greg Kroah-Hartman