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=-5.2 required=3.0 tests=BAYES_00, 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 A1A8CC433EF for ; Wed, 15 Sep 2021 13:53:35 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (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 6041D61263 for ; Wed, 15 Sep 2021 13:53:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 6041D61263 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 1EA6982980; Wed, 15 Sep 2021 13:53:35 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id XY5lv1NiowQ7; Wed, 15 Sep 2021 13:53:32 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp1.osuosl.org (Postfix) with ESMTPS id B824680BB5; Wed, 15 Sep 2021 13:53:31 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 8E460C000F; Wed, 15 Sep 2021 13:53:31 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [IPv6:2605:bc80:3010::133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 2DA18C000D for ; Wed, 15 Sep 2021 13:53:30 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 17D0D402F3 for ; Wed, 15 Sep 2021 13:53:30 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id EwFox4uc9ZCS for ; Wed, 15 Sep 2021 13:53:27 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.8.0 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by smtp2.osuosl.org (Postfix) with ESMTPS id 3D6AD40181 for ; Wed, 15 Sep 2021 13:53:26 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id AC35C67357; Wed, 15 Sep 2021 15:53:21 +0200 (CEST) Date: Wed, 15 Sep 2021 15:53:21 +0200 From: Christoph Hellwig To: Jan Beulich Subject: Re: [PATCH] swiotlb: set IO TLB segment size via cmdline Message-ID: <20210915135321.GA15216@lst.de> References: <20210914151016.3174924-1-Roman_Skakun@epam.com> <7c04db79-7de1-93ff-0908-9bad60a287b9@suse.com> <84ef7ff7-2c9c-113a-4a2c-cef54a6ded51@suse.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <84ef7ff7-2c9c-113a-4a2c-cef54a6ded51@suse.com> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: Roman Skakun , linux-doc@vger.kernel.org, Peter Zijlstra , Viresh Kumar , Linux Kernel Mailing List , Paul Mackerras , Will Deacon , Boris Ostrovsky , Stefano Stabellini , Jonathan Corbet , Michael Ellerman , Christoph Hellwig , Benjamin Herrenschmidt , xen-devel@lists.xenproject.org, "Paul E. McKenney" , Konrad Rzeszutek Wilk , Muchun Song , Thomas Gleixner , Juergen Gross , Thomas Bogendoerfer , Andrii Anisov , linuxppc-dev@lists.ozlabs.org, Randy Dunlap , linux-mips@vger.kernel.org, iommu , Roman Skakun , Andrew Morton , Robin Murphy , Mike Rapoport , "Maciej W. Rozycki" X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 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 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Wed, Sep 15, 2021 at 03:49:52PM +0200, Jan Beulich wrote: > But the question remains: Why does the framebuffer need to be mapped > in a single giant chunk? More importantly: if you use dynamic dma mappings for your framebuffer you're doing something wrong. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu