From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by mx.groups.io with SMTP id smtpd.web10.7432.1624454314311632546 for ; Wed, 23 Jun 2021 06:18:34 -0700 Authentication-Results: mx.groups.io; dkim=pass header.i=@ibm.com header.s=pp1 header.b=hqUrNqiq; spf=pass (domain: linux.ibm.com, ip: 148.163.158.5, mailfrom: dovmurik@linux.ibm.com) Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 15ND2loe122431; Wed, 23 Jun 2021 09:18:29 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=subject : to : cc : references : from : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=pp1; bh=oA+waVKoiV07BcBa8Xl934zGQFF2ygZfJQhQrck1vJI=; b=hqUrNqiq8srCnZ45RHl24hLN0cG2+M1HcqylpOuDXij1j8wD9HuuY3OucTyVCTqK8OV6 LKiJb52UOtvF6CnHOuW2lpxDuvmdyxm0JjW3YXbNeK1f3I4AZeXj7QRQYJ5wXC3CnRlQ Wj7nash7s0MsWSlfUUud3t1zMMaX8hGXz60s3pqmyPGBruvGsuMCb63lOevMddThA9hH tfZrb6JrKbzo/1cVPLRbkY+0GZIlWiWjc2X/T/WyR50NVzECT/0QJLw7flkiqV5KFcKx BNEwnWqlVCDYk9tACU/W3Yb8DGm9HNa/U/ITk8n//s65QeDmeM3QDHOAZDA0SjLOf/og Lg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 39c5errp2p-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 23 Jun 2021 09:18:29 -0400 Received: from m0098421.ppops.net (m0098421.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 15ND31cS123201; Wed, 23 Jun 2021 09:18:29 -0400 Received: from ppma03ams.nl.ibm.com (62.31.33a9.ip4.static.sl-reverse.com [169.51.49.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 39c5errp1v-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 23 Jun 2021 09:18:29 -0400 Received: from pps.filterd (ppma03ams.nl.ibm.com [127.0.0.1]) by ppma03ams.nl.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 15NDETeU032494; Wed, 23 Jun 2021 13:18:27 GMT Received: from b06avi18626390.portsmouth.uk.ibm.com (b06avi18626390.portsmouth.uk.ibm.com [9.149.26.192]) by ppma03ams.nl.ibm.com with ESMTP id 399878a0ne-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 23 Jun 2021 13:18:27 +0000 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 15NDH5sK36700474 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 23 Jun 2021 13:17:05 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 029CCAE04D; Wed, 23 Jun 2021 13:18:25 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7811AAE045; Wed, 23 Jun 2021 13:18:20 +0000 (GMT) Received: from [9.160.49.135] (unknown [9.160.49.135]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 23 Jun 2021 13:18:20 +0000 (GMT) Subject: Re: [edk2-devel] [PATCH v4 0/4] SEV Live Migration support for OVMF. To: devel@edk2.groups.io, ashish.kalra@amd.com, Laszlo Ersek Cc: brijesh.singh@amd.com, Thomas.Lendacky@amd.com, jejb@linux.ibm.com, erdemaktas@google.com, jiewen.yao@intel.com, min.m.xu@intel.com, jordan.l.justen@intel.com, ard.biesheuvel@arm.com, "Dr. David Alan Gilbert" , Paolo Bonzini , "tobin@ibm.com" References: <20210622174603.GA6366@ashkalra_ubuntu_server> From: "Dov Murik" Message-ID: <51b4bb72-d09c-66b9-d344-4e447f619d38@linux.ibm.com> Date: Wed, 23 Jun 2021 16:18:19 +0300 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <20210622174603.GA6366@ashkalra_ubuntu_server> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: yxc-cBncroq-ZTUaekRfixXuxVyhm-IQ X-Proofpoint-GUID: gZSZiY8QEjeuZq8IpluUPg0y5PTJUYRL X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.790 definitions=2021-06-23_06:2021-06-23,2021-06-23 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 clxscore=1011 malwarescore=0 phishscore=0 bulkscore=0 priorityscore=1501 impostorscore=0 lowpriorityscore=0 suspectscore=0 spamscore=0 mlxlogscore=951 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2106230076 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit +cc Tobin On 22/06/2021 20:46, Ashish Kalra via groups.io wrote: > Hello Laszlo, > > Please see my replies below : > > On Tue, Jun 22, 2021 at 07:20:53PM +0200, Laszlo Ersek wrote: -snip- > >> Anyway, where I'm particularly lost is that I (very vaguely) recall conflicting approaches from AMD and IBM on migration. Has an agreement been reached there? >> > > Yes, these are the slow SEV live migration patches. The fast migration > support is being developed by IBM and that is a separate effort. > > As this slow live migration support has now been included in KVM, we > will need the corresponding OVMF and QEMU support now. > I'll also add that the fast (guest-assisted) SEV migration we (IBM) are working on uses some of the features of the "slow" migration. For example, for sure, patches 1-3 in this series will be needed to keep the record of which of the guest pages are encrypted and which are shared (also in fast migration). -Dov