From patchwork Tue Dec 22 15:43:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julien Grall X-Patchwork-Id: 11986985 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=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,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 88D8AC433E6 for ; Tue, 22 Dec 2020 15:43:57 +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 429B723124 for ; Tue, 22 Dec 2020 15:43:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 429B723124 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=xen.org 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.57959.101626 (Exim 4.92) (envelope-from ) id 1krjpA-0006aW-8E; Tue, 22 Dec 2020 15:43:44 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 57959.101626; Tue, 22 Dec 2020 15:43:44 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1krjpA-0006aP-3c; Tue, 22 Dec 2020 15:43:44 +0000 Received: by outflank-mailman (input) for mailman id 57959; Tue, 22 Dec 2020 15:43:42 +0000 Received: from mail.xenproject.org ([104.130.215.37]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1krjp8-0006aF-CP for xen-devel@lists.xenproject.org; Tue, 22 Dec 2020 15:43:42 +0000 Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1krjp7-0001pd-RN; Tue, 22 Dec 2020 15:43:41 +0000 Received: from 54-240-197-235.amazon.com ([54.240.197.235] helo=ufe34d9ed68d054.ant.amazon.com) by xenbits.xenproject.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1krjp7-0002Vd-HS; Tue, 22 Dec 2020 15:43:41 +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" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Message-Id:Date:Subject:Cc:To:From; bh=Nll9lXZt/LBrS6V2JsGc0ecRr3c0eFUXdRQAetw31cY=; b=jN8ILFaTNV7AIRUg2huK5CT/P6 ChxZc8Be51a+GMb57kaTzZA04VURNzXy3OALTiyNbbHadx9J18InmpAUJYidbAwfm8houbg4Ub75E Gj27aDpFEv1pYaj/ZisyJoQKLD7NJ1J/zbnybgBaYjMK6t2kYA5NPg/cVEiiVERJbTu4=; From: Julien Grall To: xen-devel@lists.xenproject.org Cc: hongyxia@amazon.co.uk, Julien Grall , Jan Beulich , Paul Durrant , Andrew Cooper , =?utf-8?q?Roger_Pau_Monn=C3=A9?= , Wei Liu Subject: [PATCH for-4.15 0/4] xen/iommu: Collection of bug fixes for IOMMU teadorwn Date: Tue, 22 Dec 2020 15:43:34 +0000 Message-Id: <20201222154338.9459-1-julien@xen.org> X-Mailer: git-send-email 2.17.1 From: Julien Grall Hi all, This series is a collection of bug fixes for the IOMMU teardown code. All of them are candidate for 4.15 as they can either leak memory or lead to host crash/host corruption. This is sent directly on xen-devel because all the issues were either introduced in 4.15 or happen in the domain creation code. Cheers, Julien Grall (4): xen/iommu: Check if the IOMMU was initialized before tearing down xen/iommu: x86: Free the IOMMU page-tables with the pgtables.lock held [RFC] xen/iommu: x86: Clear the root page-table before freeing the page-tables xen/iommu: x86: Don't leak the IOMMU page-tables xen/arch/x86/domain.c | 2 +- xen/drivers/passthrough/iommu.c | 10 +++++- xen/drivers/passthrough/x86/iommu.c | 47 +++++++++++++++++++++++++++-- xen/include/asm-x86/iommu.h | 2 +- 4 files changed, 56 insertions(+), 5 deletions(-)