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=-8.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 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 523A2C31E40 for ; Tue, 6 Aug 2019 14:04:14 +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 1A53D20C01 for ; Tue, 6 Aug 2019 14:04:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1A53D20C01 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de 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 E61E5D83; Tue, 6 Aug 2019 14:04:13 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 41A88D81 for ; Tue, 6 Aug 2019 14:04:13 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id A4DE989D for ; Tue, 6 Aug 2019 14:04:12 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id 31004227A81; Tue, 6 Aug 2019 16:04:09 +0200 (CEST) Date: Tue, 6 Aug 2019 16:04:08 +0200 From: Christoph Hellwig To: "Lendacky, Thomas" Subject: Re: Regression due to d98849aff879 (dma-direct: handle DMA_ATTR_NO_KERNEL_MAPPING in common code) Message-ID: <20190806140408.GA22902@lst.de> References: <1565082809.2323.24.camel@pengutronix.de> <20190806113318.GA20215@lst.de> <41cc93b1-62b5-7fb6-060d-01982e68503b@amd.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <41cc93b1-62b5-7fb6-060d-01982e68503b@amd.com> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: "linux-kernel@vger.kernel.org" , Halil Pasic , "iommu@lists.linux-foundation.org" , Christoph Hellwig , Lucas Stach 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 Ok, does this work? -- >From 34d35f335a98f515f2516b515051e12eae744c8d Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 6 Aug 2019 14:33:23 +0300 Subject: dma-direct: fix DMA_ATTR_NO_KERNEL_MAPPING The new DMA_ATTR_NO_KERNEL_MAPPING needs to actually assign a dma_addr to work. Also skip it if the architecture needs forced decryption handling, as that needs a kernel virtual address. Fixes: d98849aff879 (dma-direct: handle DMA_ATTR_NO_KERNEL_MAPPING in common code) Signed-off-by: Christoph Hellwig --- kernel/dma/direct.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index 59bdceea3737..b01064d884f2 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -130,11 +130,13 @@ void *dma_direct_alloc_pages(struct device *dev, size_t size, if (!page) return NULL; - if (attrs & DMA_ATTR_NO_KERNEL_MAPPING) { + if ((attrs & DMA_ATTR_NO_KERNEL_MAPPING) && + !force_dma_unencrypted(dev)) { /* remove any dirty cache lines on the kernel alias */ if (!PageHighMem(page)) arch_dma_prep_coherent(page, size); /* return the page pointer as the opaque cookie */ + *dma_handle = phys_to_dma(dev, page_to_phys(page)); return page; } -- 2.20.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu