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Thu, 15 Dec 2022 20:30:37 GMT Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id AD5A07805E; Thu, 15 Dec 2022 21:49:47 +0000 (GMT) Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C530C7805C; Thu, 15 Dec 2022 21:49:46 +0000 (GMT) Received: from lingrow.int.hansenpartnership.com (unknown [9.163.9.130]) by b03ledav004.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 15 Dec 2022 21:49:46 +0000 (GMT) Message-ID: Subject: Re: [PATCH 2/2] tpm: add backend for mssim From: James Bottomley To: Stefan Berger , qemu-devel@nongnu.org Cc: "Daniel P ." =?ISO-8859-1?Q?Berrang=E9?= , Markus Armbruster Date: Thu, 15 Dec 2022 15:30:34 -0500 In-Reply-To: <9fac7d95-d891-413f-93f1-18324c7943ea@linux.ibm.com> References: <20221215180125.24632-1-jejb@linux.ibm.com> <20221215180125.24632-3-jejb@linux.ibm.com> <6fd1144d09777ddcdb7a1a1ba58cbbec345da9ef.camel@linux.ibm.com> <77bc5a11fcb7b06deba1c54b1ef2de28e0c53fb1.camel@linux.ibm.com> <10fbda0f-7c8a-3819-fb22-34a9249ac138@linux.ibm.com> <9fac7d95-d891-413f-93f1-18324c7943ea@linux.ibm.com> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.42.4 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: FvzTun6Qzhpkq7IvLLF7oblE7rowWvGD X-Proofpoint-ORIG-GUID: OubkbmZK9GmB8od1rPP0KxbDW6Sdb7PH 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=2022-12-15_11,2022-12-15_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=549 spamscore=0 clxscore=1015 impostorscore=0 malwarescore=0 adultscore=0 priorityscore=1501 mlxscore=0 bulkscore=0 lowpriorityscore=0 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2212150168 Received-SPF: pass client-ip=148.163.156.1; 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 Thu, 2022-12-15 at 15:22 -0500, Stefan Berger wrote: > On 12/15/22 15:07, James Bottomley wrote: [...] > > don't really have much interest in the migration use case, but I > > knew it should work like the passthrough case, so that's what I > > tested. > > I think your device needs to block migrations since it doesn't handle > all migration scenarios correctly. Passthrough doesn't block migrations either, presumably because it can also be made to work if you know what you're doing. I might not be particularly interested in migrations, but that's not really a good reason to prevent anyone from ever using them, particularly when the experiment says they do work. James