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=-5.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 E7200C04EB8 for ; Fri, 30 Nov 2018 10:32:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B58E62145D for ; Fri, 30 Nov 2018 10:32:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B58E62145D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de 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 S1726631AbeK3VlO (ORCPT ); Fri, 30 Nov 2018 16:41:14 -0500 Received: from verein.lst.de ([213.95.11.211]:49455 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726507AbeK3VlO (ORCPT ); Fri, 30 Nov 2018 16:41:14 -0500 Received: by newverein.lst.de (Postfix, from userid 2407) id 964A868BDF; Fri, 30 Nov 2018 11:32:22 +0100 (CET) Date: Fri, 30 Nov 2018 11:32:22 +0100 From: Christoph Hellwig To: Rui Salvaterra Cc: hch@lst.de, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org Subject: Re: use generic DMA mapping code in powerpc V4 Message-ID: <20181130103222.GA23393@lst.de> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Rui, can you check if the patch below fixes the issue for you? diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c index 2e24fc87ed84..809797dbe169 100644 --- a/arch/powerpc/sysdev/dart_iommu.c +++ b/arch/powerpc/sysdev/dart_iommu.c @@ -392,7 +392,9 @@ static void pci_dma_dev_setup_dart(struct pci_dev *dev) static bool iommu_bypass_supported_dart(struct pci_dev *dev, u64 mask) { - return dart_is_u4 && dart_device_on_pcie(&dev->dev); + return dart_is_u4 && + dart_device_on_pcie(&dev->dev) && + mask >= DMA_BIT_MASK(40); } void __init iommu_init_early_dart(struct pci_controller_ops *controller_ops)