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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 3545BC43144 for ; Tue, 26 Jun 2018 07:30:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D4A9826605 for ; Tue, 26 Jun 2018 07:30:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D4A9826605 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=de.ibm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752662AbeFZHa3 (ORCPT ); Tue, 26 Jun 2018 03:30:29 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:45390 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752149AbeFZHa1 (ORCPT ); Tue, 26 Jun 2018 03:30:27 -0400 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w5Q7Tdji131797 for ; Tue, 26 Jun 2018 03:30:26 -0400 Received: from e06smtp01.uk.ibm.com (e06smtp01.uk.ibm.com [195.75.94.97]) by mx0a-001b2d01.pphosted.com with ESMTP id 2jugf21uxd-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 26 Jun 2018 03:30:26 -0400 Received: from localhost by e06smtp01.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 26 Jun 2018 08:30:22 +0100 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w5Q7ULCj9765112 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 26 Jun 2018 07:30:21 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CCC144C046; Tue, 26 Jun 2018 08:30:13 +0100 (BST) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1C2E44C044; Tue, 26 Jun 2018 08:30:13 +0100 (BST) Received: from oc7330422307.ibm.com (unknown [9.152.224.43]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 26 Jun 2018 08:30:13 +0100 (BST) Subject: Re: [PATCH] s390/boot: block uncompressed vmlinux booting attempts To: Vasily Gorbik , Martin Schwidefsky Cc: Heiko Carstens , Cornelia Huck , Guenter Roeck , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, qemu-s390x , qemu-devel , Thomas Huth References: <64bcba64-b88f-3594-da6e-7c2118482c20@roeck-us.net> From: Christian Borntraeger Openpgp: preference=signencrypt Autocrypt: addr=borntraeger@de.ibm.com; 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Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-TM-AS-GCONF: 00 x-cbid: 18062607-4275-0000-0000-00000291E8F6 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18062607-4276-0000-0000-000037994C23 Message-Id: <7cb526fc-9da4-248b-d5c4-cb463a2c2bac@de.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-06-26_05:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=829 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1806210000 definitions=main-1806260084 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/25/2018 05:09 PM, Vasily Gorbik wrote: > Since uncompressed kernel image "vmlinux" elf file is not bootable under > qemu anymore, add a check which would report that. > > Qemu users are encouraged to use bzImage or > arch/s390/boot/compressed/vmlinux instead. > > The check relies on s390 linux entry point ABI definition, which is only > present in bzImage and arch/s390/boot/compressed/vmlinux. > > Signed-off-by: Vasily Gorbik Acked-by: Christian Borntraeger some proposals regarding the wording below.. [...] > + > + sclp_early_printk("The linux kernel boot failure: the image is corrupted or not bootable.\n"); > + sclp_early_printk("Please check that you are using bootable kernel image \"bzImage\".\n"); > + sclp_early_printk("(or alternatively \"arch/s390/boot/compressed/vmlinux\" image for qemu)\n"); What about making this explain things a bit more, e.g. something like Linux kernel boot failure: The boot image does not contain all necessary components (like the entry point and decompressor). The plain vmlinux ELF file no longer carries all necessary parts for starting up. Please use bzImage or arch/s390/boot/compressed/vmlinux.