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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 4DEBCC433B4 for ; Thu, 22 Apr 2021 04:25:44 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 04D4160698 for ; Thu, 22 Apr 2021 04:25:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 04D4160698 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bugs.launchpad.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:36502 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lZQuL-00056H-49 for qemu-devel@archiver.kernel.org; Thu, 22 Apr 2021 00:25:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41076) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lZQpb-0006S8-Oz for qemu-devel@nongnu.org; Thu, 22 Apr 2021 00:20:47 -0400 Received: from indium.canonical.com ([91.189.90.7]:43668) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lZQpZ-0007mx-M8 for qemu-devel@nongnu.org; Thu, 22 Apr 2021 00:20:47 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1lZQpY-0006Is-LR for ; Thu, 22 Apr 2021 04:20:44 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id A09DA2E815A for ; Thu, 22 Apr 2021 04:20:44 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Thu, 22 Apr 2021 04:11:47 -0000 From: Thomas Huth <1811888@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=Incomplete; importance=Wishlist; assignee=None; X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: th-huth xyz-k X-Launchpad-Bug-Reporter: Lukasz Janyst (xyz-k) X-Launchpad-Bug-Modifier: Thomas Huth (th-huth) References: <154758033350.20612.10612778559248871550.malonedeb@soybean.canonical.com> Message-Id: <161906470742.22523.8911603345696338291.malone@gac.canonical.com> Subject: [Bug 1811888] Re: Qemu refuses to multiboot Elf64 kernels X-Launchpad-Message-Rationale: Subscriber (QEMU) @qemu-devel-ml X-Launchpad-Message-For: qemu-devel-ml Precedence: bulk X-Generated-By: Launchpad (canonical.com); Revision="1552fceb1603b3da6cfa437575d9c9fc4b2e683a"; Instance="production" X-Launchpad-Hash: 9468127672a62d3b349563863d4f17c2dcbc9906 Received-SPF: none client-ip=91.189.90.7; envelope-from=bounces@canonical.com; helo=indium.canonical.com X-Spam_score_int: -65 X-Spam_score: -6.6 X-Spam_bar: ------ X-Spam_report: (-6.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bug 1811888 <1811888@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The QEMU project is currently considering to move its bug tracking to anoth= er system. For this we need to know which bugs are still valid and which co= uld be closed already. Thus we are setting older bugs to "Incomplete" now. If you still think this bug report here is valid, then please switch the st= ate back to "New" within the next 60 days, otherwise this report will be ma= rked as "Expired". Or mark it as "Fix Released" if the problem has been sol= ved with a newer version of QEMU already. Thank you and sorry for the incon= venience. ** Changed in: qemu Status: New =3D> Incomplete -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1811888 Title: Qemu refuses to multiboot Elf64 kernels Status in QEMU: Incomplete Bug description: Qemu does not multiboot Elf64 bit kernels when emulating x86_64 systems. This is unfortunate because it renders the `-kernel` option quite useless. It's true that a multiboot compatible bootloader puts you in protected mode by default, and you have to set up the long mode yourself. While it is easy to put such 32-bit bootstrap code in a 64 bit binary, it is not possible to compile a 64 bit kernel into a 32 bit binary. After quick search, it turned out that loading 64 bit elf binaries has been disabled to be compatible with GRUB. However, since that time, both GRUB and Syslinux load 64 bit ELF kernels just fine, which makes qemu incompatible with them. Furthermore, it seems that this feature does and has always worked fine and that people have since submitted patches to re-enable it. https://patchwork.ozlabs.org/patch/62142/ https://patchwork.kernel.org/patch/9770523/ Please consider applying the attached patch. Best Regards, Lukasz Janyst To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1811888/+subscriptions