From patchwork Sun Feb 7 16:09:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12073145 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 50721C433E0 for ; Sun, 7 Feb 2021 16:10:04 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 1591D64DF2 for ; Sun, 7 Feb 2021 16:10:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1591D64DF2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.82430.152241 (Exim 4.92) (envelope-from ) id 1l8mdI-00047e-N1; Sun, 07 Feb 2021 16:09:56 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 82430.152241; Sun, 07 Feb 2021 16:09:56 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1l8mdI-00047X-Jb; Sun, 07 Feb 2021 16:09:56 +0000 Received: by outflank-mailman (input) for mailman id 82430; Sun, 07 Feb 2021 16:09:55 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1l8mdH-00042X-IA for xen-devel@lists.xenproject.org; Sun, 07 Feb 2021 16:09:55 +0000 Received: from casper.infradead.org (unknown [2001:8b0:10b:1236::1]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 83c2965e-1cdd-4643-a833-b32e7e910eb2; Sun, 07 Feb 2021 16:09:47 +0000 (UTC) Received: from [2001:4bb8:184:7d04:4590:5583:6cb7:77c7] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1l8md1-004tmA-Lk; Sun, 07 Feb 2021 16:09:40 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 83c2965e-1cdd-4643-a833-b32e7e910eb2 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.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; bh=jFI2mi7dyRl0KQwCReup9amZMDdC7KVLA5/jiqTUJgc=; b=PzcY4sAIeTkV30mNeSR7f4zhev 1l86naI/SQcUf0zOFqJq4KJw5/8N1oMJjS8yNc/Z8ehT98TCXfbqC0yQIJkU5+vzsX2EJcA7lqXnD inxtjszyQ9sK7lZOffjVlwnAIPOGvXzlMpup2gQRm/SVMpF6REFiaCeA3V36wmiPskUOOwbKs2f2/ Bh9N0vS73XhuuqKUlQtGemY4mIiM6twaFuU0N84w1IvGRIOriBPhiyre+OW/45YumEnkat66MuvVP iZjwGsedAM5O6qFZcTy0pBe4gMYLXotX3BJJucUjweYhEXiYYk6TIHHM3R2KLkGXZDkHwdJsP3F08 DtFINz5Q==; From: Christoph Hellwig To: Konrad Rzeszutek Wilk Cc: Michael Ellerman , Dongli Zhang , Claire Chang , xen-devel@lists.xenproject.org, linuxppc-dev@lists.ozlabs.org, iommu@lists.linux-foundation.org Subject: [PATCH 2/8] xen-swiotlb: use is_swiotlb_buffer in is_xen_swiotlb_buffer Date: Sun, 7 Feb 2021 17:09:28 +0100 Message-Id: <20210207160934.2955931-3-hch@lst.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210207160934.2955931-1-hch@lst.de> References: <20210207160934.2955931-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Use the is_swiotlb_buffer to check if a physical address is a swiotlb buffer. This works because xen-swiotlb does use the same buffer as the main swiotlb code, and xen_io_tlb_{start,end} are just the addresses for it that went through phys_to_virt. Signed-off-by: Christoph Hellwig Reviewed-by: Konrad Rzeszutek Wilk --- drivers/xen/swiotlb-xen.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index 2b385c1b4a99cb..a4026822a889f7 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -111,10 +111,8 @@ static int is_xen_swiotlb_buffer(struct device *dev, dma_addr_t dma_addr) * have the same virtual address as another address * in our domain. Therefore _only_ check address within our domain. */ - if (pfn_valid(PFN_DOWN(paddr))) { - return paddr >= virt_to_phys(xen_io_tlb_start) && - paddr < virt_to_phys(xen_io_tlb_end); - } + if (pfn_valid(PFN_DOWN(paddr))) + return is_swiotlb_buffer(paddr); return 0; }