From patchwork Wed May 20 12:14:20 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ian Jackson X-Patchwork-Id: 11560103 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A485F138A for ; Wed, 20 May 2020 12:16:19 +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 89F682070A for ; Wed, 20 May 2020 12:16:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 89F682070A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=eu.citrix.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jbNcO-00056p-1F; Wed, 20 May 2020 12:14:40 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jbNcM-00056k-Jl for xen-devel@lists.xenproject.org; Wed, 20 May 2020 12:14:38 +0000 X-Inumbo-ID: 7544f0c2-9a93-11ea-b07b-bc764e2007e4 Received: from chiark.greenend.org.uk (unknown [2001:ba8:1e3::3]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 7544f0c2-9a93-11ea-b07b-bc764e2007e4; Wed, 20 May 2020 12:14:31 +0000 (UTC) Received: from [172.18.45.5] (helo=zealot.relativity.greenend.org.uk) by chiark.greenend.org.uk (Debian Exim 4.84_2 #1) with esmtp (return-path ijackson@chiark.greenend.org.uk) id 1jbNcE-0001Rk-AZ; Wed, 20 May 2020 13:14:30 +0100 From: Ian Jackson To: grub-devel@gnu.org Subject: [GRUB PATCH 2/2] 20_linux_xen: Support Xen Security Modules (XSM/FLASK) Date: Wed, 20 May 2020 13:14:20 +0100 Message-Id: <20200520121420.7965-3-ian.jackson@eu.citrix.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200520121420.7965-1-ian.jackson@eu.citrix.com> References: <20200520121420.7965-1-ian.jackson@eu.citrix.com> MIME-Version: 1.0 X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: xen-devel@lists.xenproject.org, Ian Jackson Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" XSM is enabled by adding "flask=enforcing" as a Xen command line argument, and providing the policy file as a grub module. We make entries for both with and without XSM. If XSM is not compiled into Xen, then there are no policy files, so no change to the boot options. Signed-off-by: Ian Jackson --- util/grub.d/20_linux_xen.in | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/util/grub.d/20_linux_xen.in b/util/grub.d/20_linux_xen.in index 30da49d66..7a092b898 100644 --- a/util/grub.d/20_linux_xen.in +++ b/util/grub.d/20_linux_xen.in @@ -94,6 +94,11 @@ esac title_correction_code= linux_entry () +{ + linux_entry_xsm "$@" false + linux_entry_xsm "$@" true +} +linux_entry_xsm () { os="$1" version="$2" @@ -101,6 +106,18 @@ linux_entry () type="$4" args="$5" xen_args="$6" + xsm="$7" + # If user wants to enable XSM support, make sure there's + # corresponding policy file. + if ${xsm} ; then + xenpolicy="xenpolicy-$xen_version" + if test ! -e "${xen_dirname}/${xenpolicy}" ; then + return + fi + xen_args="$xen_args flask=enforcing" + xen_version="$(gettext_printf "%s (XSM enabled)" "$xen_version")" + # xen_version is used for messages only; actual file is xen_basename + fi if [ -z "$boot_device_id" ]; then boot_device_id="$(grub_get_device_id "${GRUB_DEVICE}")" fi @@ -154,6 +171,13 @@ EOF sed "s/^/$submenu_indentation/" << EOF echo '$(echo "$message" | grub_quote)' ${module_loader} --nounzip $(echo $initrd_path) +EOF + fi + if test -n "${xenpolicy}" ; then + message="$(gettext_printf "Loading XSM policy ...")" + sed "s/^/$submenu_indentation/" << EOF + echo '$(echo "$message" | grub_quote)' + ${module_loader} ${rel_dirname}/${xenpolicy} EOF fi sed "s/^/$submenu_indentation/" << EOF