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=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 DC973C43603 for ; Wed, 18 Dec 2019 04:12:45 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 AA964206EE for ; Wed, 18 Dec 2019 04:12:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AA964206EE Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 7952322843; Wed, 18 Dec 2019 04:12:45 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id m1cIGieptBbL; Wed, 18 Dec 2019 04:12:44 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by silver.osuosl.org (Postfix) with ESMTP id 984CF227F8; Wed, 18 Dec 2019 04:12:44 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 7DDB7C1D7D; Wed, 18 Dec 2019 04:12:44 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 2D035C077D for ; Wed, 18 Dec 2019 04:12:43 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 1BD0A86A63 for ; Wed, 18 Dec 2019 04:12:43 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id xdy1H8zPWnZi for ; Wed, 18 Dec 2019 04:12:42 +0000 (UTC) X-Greylist: delayed 00:07:29 by SQLgrey-1.7.6 Received: from ozlabs.org (bilbo.ozlabs.org [203.11.71.1]) by fraxinus.osuosl.org (Postfix) with ESMTPS id BF55C8598A for ; Wed, 18 Dec 2019 04:12:41 +0000 (UTC) Received: by ozlabs.org (Postfix, from userid 1034) id 47d1cj4B0Fz9sRc; Wed, 18 Dec 2019 15:05:09 +1100 (AEDT) X-powerpc-patch-notification: thanks X-powerpc-patch-commit: 8fabc623238e68b3ac63c0dd1657bf86c1fa33af In-Reply-To: <20191204123524.22919-1-rppt@kernel.org> To: Mike Rapoport , linux-kernel@vger.kernel.org From: Michael Ellerman Subject: Re: [PATCH] powerpc: ensure that swiotlb buffer is allocated from low memory Message-Id: <47d1cj4B0Fz9sRc@ozlabs.org> Date: Wed, 18 Dec 2019 15:05:09 +1100 (AEDT) Cc: linux-arch@vger.kernel.org, Darren Stevens , linuxppc-dev@lists.ozlabs.org, Mike Rapoport , linux-mm@kvack.org, iommu@lists.linux-foundation.org, Rob Herring , Paul Mackerras , mad skateman , Christian Zigotzky , Robin Murphy , Christoph Hellwig , Nicolas Saenz Julienne 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: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Wed, 2019-12-04 at 12:35:24 UTC, Mike Rapoport wrote: > From: Mike Rapoport > > Some powerpc platforms (e.g. 85xx) limit DMA-able memory way below 4G. If a > system has more physical memory than this limit, the swiotlb buffer is not > addressable because it is allocated from memblock using top-down mode. > > Force memblock to bottom-up mode before calling swiotlb_init() to ensure > that the swiotlb buffer is DMA-able. > > Link: https://lkml.kernel.org/r/F1EBB706-73DF-430E-9020-C214EC8ED5DA@xenosoft.de > Reported-by: Christian Zigotzky > Signed-off-by: Mike Rapoport Applied to powerpc fixes, thanks. https://git.kernel.org/powerpc/c/8fabc623238e68b3ac63c0dd1657bf86c1fa33af cheers _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu