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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5A0F0C433F5 for ; Wed, 27 Apr 2022 07:07:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353855AbiD0HLD (ORCPT ); Wed, 27 Apr 2022 03:11:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50790 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357350AbiD0HLC (ORCPT ); Wed, 27 Apr 2022 03:11:02 -0400 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 189892B1B8; Wed, 27 Apr 2022 00:07:52 -0700 (PDT) Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 23R3Xsjw013169; Wed, 27 Apr 2022 07:07:51 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=message-id : date : mime-version : subject : from : to : cc : references : in-reply-to : content-type : content-transfer-encoding; s=pp1; bh=B67+j3oXFnkiSg6DNRe3WHK5zySHQwpUkwhESGoxCbo=; b=kRVTxpgyrde2oL1puFGAToRY0aCW/OxdFYkbSycCoSW2gvafb5tIxY5lgvGz5Vc9kEOF eBABtkbul+D66Achobk9TOrPuXJCpzgZxuhSfwUOai2LlFVu9zW3EnHl7BnPcpHOBAol VFWjUZ8uht8neRYecPDG4GHwgaOnV6HYdAVYU08GahL1Tp+LzetbG5Ze9Q+fUYdCws1H TgztsNJsLetXw2Rm0xzgWId+K59U6wDfI/mxyBEbQqfBc79k/zbxxv6UcwjhNc0Xbfor vQjuUQ0uEB+V+y4E4DFqfxipMo7SOxo6C4rDvwGGBrK/L6qdmjg9i4lF8jnSswuxx6rh MA== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3fpsspy5ud-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 27 Apr 2022 07:07:51 +0000 Received: from m0098404.ppops.net (m0098404.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 23R6tJOP012846; Wed, 27 Apr 2022 07:07:51 GMT Received: from ppma04ams.nl.ibm.com (63.31.33a9.ip4.static.sl-reverse.com [169.51.49.99]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3fpsspy5tr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 27 Apr 2022 07:07:51 +0000 Received: from pps.filterd (ppma04ams.nl.ibm.com [127.0.0.1]) by ppma04ams.nl.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 23R72Uv2013217; Wed, 27 Apr 2022 07:07:49 GMT Received: from b06cxnps4075.portsmouth.uk.ibm.com (d06relay12.portsmouth.uk.ibm.com [9.149.109.197]) by ppma04ams.nl.ibm.com with ESMTP id 3fm938wgkc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 27 Apr 2022 07:07:48 +0000 Received: from d06av24.portsmouth.uk.ibm.com (mk.ibm.com [9.149.105.60]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 23R77jcN48365908 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 27 Apr 2022 07:07:45 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BD8F842042; Wed, 27 Apr 2022 07:07:45 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 717394203F; Wed, 27 Apr 2022 07:07:45 +0000 (GMT) Received: from [9.145.11.55] (unknown [9.145.11.55]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 27 Apr 2022 07:07:45 +0000 (GMT) Message-ID: <07c0a131-d695-1c08-e500-94b593203db9@linux.ibm.com> Date: Wed, 27 Apr 2022 09:07:44 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: [PATCH v2 0/9] kvm: s390: Add PV dump support Content-Language: en-US From: Janosch Frank To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, imbrenda@linux.ibm.com, david@redhat.com, borntraeger@linux.ibm.com References: <20220310103112.2156-1-frankja@linux.ibm.com> In-Reply-To: <20220310103112.2156-1-frankja@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: jxELmoLMLNKBgohA32KvE1gGVyvSrCHR X-Proofpoint-ORIG-GUID: Tl9BbERA6vh2jqKsT20SM3F69hNSA8br X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.858,Hydra:6.0.486,FMLib:17.11.64.514 definitions=2022-04-27_02,2022-04-26_02,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 spamscore=0 mlxscore=0 phishscore=0 suspectscore=0 adultscore=0 lowpriorityscore=0 bulkscore=0 impostorscore=0 mlxlogscore=687 malwarescore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2204270047 Precedence: bulk List-ID: X-Mailing-List: linux-s390@vger.kernel.org On 3/10/22 11:31, Janosch Frank wrote: > Sometimes dumping inside of a VM fails, is unavailable or doesn't > yield the required data. For these occasions we dump the VM from the > outside, writing memory and cpu data to a file. > > Up to now PV guests only supported dumping from the inside of the > guest through dumpers like KDUMP. A PV guest can be dumped from the > hypervisor but the data will be stale and / or encrypted. > > To get the actual state of the PV VM we need the help of the > Ultravisor who safeguards the VM state. New UV calls have been added > to initialize the dump, dump storage state data, dump cpu data and > complete the dump process. Ping