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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 4D7F6C43603 for ; Mon, 16 Dec 2019 12:16:39 +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 24D18206CB for ; Mon, 16 Dec 2019 12:16:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 24D18206CB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=de.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:52564 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1igpIk-0008RT-6l for qemu-devel@archiver.kernel.org; Mon, 16 Dec 2019 07:16:38 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:48888) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1igpI3-00081g-70 for qemu-devel@nongnu.org; Mon, 16 Dec 2019 07:15:56 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1igpI2-0000GZ-1x for qemu-devel@nongnu.org; Mon, 16 Dec 2019 07:15:55 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:46964) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1igpI1-0000FL-Qi for qemu-devel@nongnu.org; Mon, 16 Dec 2019 07:15:54 -0500 Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id xBGC7YGL132490 for ; Mon, 16 Dec 2019 07:15:52 -0500 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0a-001b2d01.pphosted.com with ESMTP id 2wwe361101-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 16 Dec 2019 07:15:52 -0500 Received: from localhost by e06smtp04.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) Mon, 16 Dec 2019 12:15:47 -0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id xBGCFkNa37814308 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 16 Dec 2019 12:15:46 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 09DEDA405B; Mon, 16 Dec 2019 12:15:46 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BC8FDA4054; Mon, 16 Dec 2019 12:15:45 +0000 (GMT) Received: from oc7455500831.ibm.com (unknown [9.152.224.212]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 16 Dec 2019 12:15:45 +0000 (GMT) Subject: Re: [RFC QEMU PATCH] pc-bios/s390-ccw: Add zipl-like "BOOT_IMAGE=x" to the kernel parameters To: Cornelia Huck References: <20191216112432.13412-1-thuth@redhat.com> <20191216130920.42711f32.cohuck@redhat.com> From: Christian Borntraeger Autocrypt: addr=borntraeger@de.ibm.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.0 MIME-Version: 1.0 In-Reply-To: <20191216130920.42711f32.cohuck@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 19121612-0016-0000-0000-000002D55C9E X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19121612-0017-0000-0000-000033378FED Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-12-16_04:2019-12-16,2019-12-16 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 bulkscore=0 adultscore=0 lowpriorityscore=0 phishscore=0 spamscore=0 impostorscore=0 clxscore=1015 mlxlogscore=939 malwarescore=0 mlxscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-1912160109 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.156.1 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-s390@vger.kernel.org, =?UTF-8?Q?Jan_H=c3=b6ppner?= , Thomas Huth , qemu-devel@nongnu.org, qemu-s390x@nongnu.org, Stefan Haberland , psundara@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 16.12.19 13:09, Cornelia Huck wrote: > On Mon, 16 Dec 2019 12:29:24 +0100 > Christian Borntraeger wrote: > >> On 16.12.19 12:24, Thomas Huth wrote: >>> Note: I've marked the patch as RFC since I'm not quite sure whether >>> this is really the right way to address this issue: It's unfortunate >>> that we have to mess with different location in ZIPL which might also >>> change again in the future. As suggested by Christian on IRC last week, >>> maybe it would make more sense to change ZIPL to add this parameter >>> already when zipl is installed (i.e. by the Linux userspace "zipl" pro- >>> gram), instead of adding it during boot time? Also, the BOOT_IMAGE para- >>> meter on s390x is quite different from the BOOT_IMAGE paramter that is >>> used on x86 - while s390x only uses one single number here, the x86 >>> variant (added by grub2, I guess) uses the boot device + full filename >>> of the kernel on the boot partition. Should we maybe make the s390x >>> variant more conform to x86? If so, I think this really has to be fixed >>> in zipl userspace tool, and not in the s390-ccw bios (and zipl stage3 >>> bootloader). >> >> Yes, I actually think we should revisit the whole BOOT_IMAGE scheme on s390. >> Maybe we should use the kernel name, or the name of the boot menu entry. >> And maybe we should not use 0 (when the default is running) but instead >> really use to what 0 points to. > > Probably dumb question: Is booting via the s390-ccw bios the only time > we boot without going through zipl? What about e.g. booting from the > reader under z/VM? There's probably no BOOT_IMAGE= statement there, > either? I just learned from Peter that booting SCSI also has no BOOT_IMAGE (as we have no menu). So Thomas, can you find out the use case for the initial bug report. That might give an indication on how to proceed for all cases.