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Mon, 9 Jan 2023 17:55:30 GMT Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 679C87805E; Mon, 9 Jan 2023 19:32:02 +0000 (GMT) Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 731447805C; Mon, 9 Jan 2023 19:32:01 +0000 (GMT) Received: from lingrow.int.hansenpartnership.com (unknown [9.163.48.220]) by b03ledav004.gho.boulder.ibm.com (Postfix) with ESMTP; Mon, 9 Jan 2023 19:32:01 +0000 (GMT) Message-ID: Subject: Re: [PATCH 2/2] tpm: add backend for mssim From: James Bottomley To: "Dr. David Alan Gilbert" Cc: "Daniel P." =?ISO-8859-1?Q?Berrang=E9?= , Stefan Berger , qemu-devel@nongnu.org, Markus Armbruster Date: Mon, 09 Jan 2023 12:55:27 -0500 In-Reply-To: References: <9fac7d95-d891-413f-93f1-18324c7943ea@linux.ibm.com> <29e99f54-d5e8-b18d-08a6-d24435032272@linux.ibm.com> <5c07f6ab6adfe53f7e7fbeeda67f2eb62afccdfa.camel@linux.ibm.com> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.42.4 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: cCJqEpJiO-CEwYIqL59aE9ucn7zl2ENG X-Proofpoint-GUID: CFEeoTPT80Y0xjQXsiTk71nwFeIyHS9s X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.923,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2023-01-09_10,2023-01-09_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 mlxlogscore=543 impostorscore=0 bulkscore=0 clxscore=1015 suspectscore=0 phishscore=0 spamscore=0 mlxscore=0 adultscore=0 priorityscore=1501 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2301090125 Received-SPF: pass client-ip=148.163.158.5; envelope-from=jejb@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: jejb@linux.ibm.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Mon, 2023-01-09 at 17:52 +0000, Dr. David Alan Gilbert wrote: > * James Bottomley (jejb@linux.ibm.com) wrote: [...] > > external MSSIM TPM emulator has to be kept running to preserve the > > state.  If you restart it, the migration will fail. > > Document that and we're getting there. The documentation in the current patch series says ---- The mssim backend supports snapshotting and migration, but the state of the Microsoft Simulator server must be preserved (or the server kept running) outside of QEMU for restore to be successful. ---- What, beyond this would you want to see? James