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=-9.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 E142EC432C3 for ; Wed, 27 Nov 2019 14:40:19 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A393C20722 for ; Wed, 27 Nov 2019 14:40:19 +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="uo3NQC8M" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A393C20722 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 3F57B6B04AD; Wed, 27 Nov 2019 09:40:19 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 3A6936B04AE; Wed, 27 Nov 2019 09:40:19 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2E36A6B04AF; Wed, 27 Nov 2019 09:40:19 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0207.hostedemail.com [216.40.44.207]) by kanga.kvack.org (Postfix) with ESMTP id 16D166B04AD for ; Wed, 27 Nov 2019 09:40:19 -0500 (EST) Received: from smtpin19.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with SMTP id D36C74DAD for ; Wed, 27 Nov 2019 14:40:18 +0000 (UTC) X-FDA: 76202317716.19.grain77_59ff54e307a26 X-HE-Tag: grain77_59ff54e307a26 X-Filterd-Recvd-Size: 2727 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf24.hostedemail.com (Postfix) with ESMTP for ; Wed, 27 Nov 2019 14:40:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type: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=howc56bxTEyWXedb5RcS/cev28tOk9Lz2mtefx1HF+w=; b=uo3NQC8M7tVPEIZTbh3f/yeg/a 1ohDdK9fsu6Jx5pkykl7Y4CnpzvLq3y67GfVai1JbgdtrZLrza/17IYN6R3L4/ZiW7b6ZIFuRNXdC xv7zTtRjjsiWfc8jTu4jsHsBTzzNCNiJd+E4CnWGba5IMlaywtDJ31GO4u8HrHfZ+NdXkK18ZsreS PHSZBGMHPP9VCXlqT/7BwYSOI17nsYTvtOnGeVE+63tsJOZWOj8PyVVVnVqHpz788SpA0I9MfBs1f 0DAo7dknCRYaNVrBvA+EryacOtNeB2t9ZJcYoKD6RLG5aMdzwDxhHpaycRrUvVKEiH6TgV+i9nNxs z2QnEoWQ==; Received: from clnet-p19-102.ikbnet.co.at ([83.175.77.102] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1iZyUF-0006rV-2E; Wed, 27 Nov 2019 14:40:11 +0000 From: Christoph Hellwig To: Thomas Hellstrom Cc: =?UTF-8?q?Christian=20K=C3=B6nig?= , Tom Lendacky , iommu@lists.linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] dma-mapping: force unencryped devices are always addressing limited Date: Wed, 27 Nov 2019 15:40:06 +0100 Message-Id: <20191127144006.25998-3-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191127144006.25998-1-hch@lst.de> References: <20191127144006.25998-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Devices that are forced to DMA through unencrypted bounce buffers need to be treated as if they are addressing limited. Signed-off-by: Christoph Hellwig --- kernel/dma/mapping.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index 1dbe6d725962..f6c35b53d996 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -416,6 +416,8 @@ EXPORT_SYMBOL_GPL(dma_get_merge_boundary); */ bool dma_addressing_limited(struct device *dev) { + if (force_dma_unencrypted(dev)) + return true; return min_not_zero(dma_get_mask(dev), dev->bus_dma_limit) < dma_get_required_mask(dev); } --=20 2.20.1