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=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, 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 1B0B5ECE58E for ; Tue, 15 Oct 2019 10:04:36 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (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 D2D582089C for ; Tue, 15 Oct 2019 10:04:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="p8gST8Pm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D2D582089C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 916DDAF0; Tue, 15 Oct 2019 10:04:35 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 52B7C89B for ; Tue, 15 Oct 2019 10:04:34 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 02E3314D for ; Tue, 15 Oct 2019 10:04:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=KeSiQTLT5+yUYgIlTjDJIYnfdPX9XyC/fQqAdAFrXwA=; b=p8gST8Pmdk8tN5w1R3L7qghN0 wvgF183kCQmYV1dcdqLrMf0q+n25gOlLCWOJJX4Icj4VB/IXiGYE4/acROOU0l6Axq85KfjPoVKos D1lMywlCB/rrSFvteE5GmN/0tm7LPO/jc9Mm1e3FJYm8xhBtV+bn1TswBFJQGE+flh/fLJo5GccyW jM4j2hGgiRtbyzpgWl8+XdqJbp2diK/jRAhGmBTvmxh8kyDu+W1Od/73ux0av5o42qUwQxGo4VgoY pDIUBPQlCz/VO+5sIuBwGqUhdtHq+xVmzjWw3FCG3P6seqzLgX2WmNHAZ+AGgz/Uflww0PCYeoUUw tbckxSJWQ==; Received: from hch by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1iKJgs-0003gF-EB; Tue, 15 Oct 2019 10:04:30 +0000 Date: Tue, 15 Oct 2019 03:04:30 -0700 From: Christoph Hellwig To: Nicolas Saenz Julienne Subject: Re: [PATCH RFC 2/5] ARM: introduce arm_dma_direct Message-ID: <20191015100430.GA13893@infradead.org> References: <20191014183108.24804-1-nsaenzjulienne@suse.de> <20191014183108.24804-3-nsaenzjulienne@suse.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20191014183108.24804-3-nsaenzjulienne@suse.de> User-Agent: Mutt/1.12.1 (2019-06-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Cc: mbrugger@suse.com, linux-kernel@vger.kernel.org, Russell King , iommu@lists.linux-foundation.org, f.fainelli@gmail.com, bcm-kernel-feedback-list@broadcom.com, linux-rpi-kernel@lists.infradead.org, Robin Murphy , linux-arm-kernel@lists.infradead.org, wahrenst@gmx.net X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org I think we just need to byte the bullet and move over arm to dma-direct entirely. This needs a careful audit of what differs, but the biggest item is that we need to ensure dmabounce keeps working (or is replaced with swiotlb in a suitable way, but that might be a lot more work). _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu