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=-2.3 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 2C36CC33CAC for ; Mon, 3 Feb 2020 13:33:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F38292086A for ; Mon, 3 Feb 2020 13:33:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727988AbgBCNdC (ORCPT ); Mon, 3 Feb 2020 08:33:02 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:31762 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726913AbgBCNdB (ORCPT ); Mon, 3 Feb 2020 08:33:01 -0500 Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 013DU9xr039148 for ; Mon, 3 Feb 2020 08:33:00 -0500 Received: from e06smtp07.uk.ibm.com (e06smtp07.uk.ibm.com [195.75.94.103]) by mx0b-001b2d01.pphosted.com with ESMTP id 2xxgqfg9y0-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 03 Feb 2020 08:32:59 -0500 Received: from localhost by e06smtp07.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, 3 Feb 2020 13:32:54 -0000 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 013DWrFA45809978 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 3 Feb 2020 13:32:53 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0DE4A11C058; Mon, 3 Feb 2020 13:32:53 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C914711C052; Mon, 3 Feb 2020 13:32:52 +0000 (GMT) Received: from oc7455500831.ibm.com (unknown [9.152.224.41]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 3 Feb 2020 13:32:52 +0000 (GMT) Subject: Re: [RFCv2 00/37] KVM: s390: Add support for protected VMs To: Cornelia Huck Cc: Janosch Frank , KVM , David Hildenbrand , Thomas Huth , Ulrich Weigand , Claudio Imbrenda , Andrea Arcangeli References: <20200203131957.383915-1-borntraeger@de.ibm.com> <20200203142329.5779068f.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/68.3.0 MIME-Version: 1.0 In-Reply-To: <20200203142329.5779068f.cohuck@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 20020313-0028-0000-0000-000003D6FCAC X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20020313-0029-0000-0000-0000249B5479 Message-Id: <388d6049-a83e-ced3-ac32-303b3e8b8960@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-02-03_04:2020-02-02,2020-02-03 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 suspectscore=0 adultscore=0 mlxscore=0 priorityscore=1501 phishscore=0 spamscore=0 malwarescore=0 mlxlogscore=742 lowpriorityscore=0 clxscore=1015 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1911200001 definitions=main-2002030101 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 03.02.20 14:23, Cornelia Huck wrote: > On Mon, 3 Feb 2020 08:19:20 -0500 > Christian Borntraeger wrote: > >> Protected VMs (PVM) are KVM VMs, where KVM can't access the VM's state >> like guest memory and guest registers anymore. Instead the PVMs are >> mostly managed by a new entity called Ultravisor (UV), which provides >> an API, so KVM and the PV can request management actions. >> >> PVMs are encrypted at rest and protected from hypervisor access while >> running. They switch from a normal operation into protected mode, so >> we can still use the standard boot process to load a encrypted blob >> and then move it into protected mode. >> >> Rebooting is only possible by passing through the unprotected/normal >> mode and switching to protected again. >> >> All patches are in the protvirtv2 branch of the korg s390 kvm git >> (on top of Janoschs reset rework). >> >> Claudio presented the technology at his presentation at KVM Forum >> 2019. > > Do you have a changelog from v1 somewhere? Probably too many things have changed. There is still the old branch protvirt that rebases almost fine on top of v5.5 so here are the differences that I can see - docs as rst instead of txt - memory management now with paging - MEMOP interface now different (new code points instead of abusing the old ones) - prefix page handling with intercept 112 (prefix not secure) - interrupt refreshing exits reworked according to review - fencing in several ioctls - based on reset rework - fixes fixes and fixes > >> >> This contains a "pretty small" common code memory management change that >> will allow paging, guest backing with files etc almost just like normal >> VMs. Please note that the memory management part will still see some >> changes to deal with a corner case for the adapter interrupt indicator >> pages. So please focus on the non-mm parts (which hopefully has >> everthing addressed in the next version). Claudio will work with Andrea >> regarding this. >