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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: <29392c1a-ec17-b846-b842-5bc2f07382e6@de.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.676 definitions=2020-04-30_11:2020-04-30, 2020-04-30 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 spamscore=0 clxscore=1011 phishscore=0 adultscore=0 priorityscore=1501 mlxlogscore=999 bulkscore=0 impostorscore=0 lowpriorityscore=0 malwarescore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004300142 Received-SPF: pass client-ip=148.163.156.1; envelope-from=borntraeger@de.ibm.com; helo=mx0a-001b2d01.pphosted.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/04/30 14:47:14 X-ACL-Warn: Detected OS = Linux 3.x [generic] X-Received-From: 148.163.156.1 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: berrange@redhat.com, ehabkost@redhat.com, Cornelia Huck , Halil Pasic , qemu-s390x@nongnu.org, pbonzini@redhat.com, Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 29.04.20 10:54, Christian Borntraeger wrote: > > > On 28.04.20 19:13, David Hildenbrand wrote: >> On 28.04.20 18:34, Markus Armbruster wrote: >>> Both s390_features[S390_FEAT_PCC_CMAC_AES_256].name and >>> s390_features[S390_FEAT_PCC_CMAC_EAES_256].name is >>> "pcc-cmac-eaes-256". The former is obviously a pasto. >>> >>> Impact: >>> >>> * s390_feat_bitmap_to_ascii() misidentifies S390_FEAT_PCC_CMAC_AES_256 >>> as "pcc-cmac-eaes-256". Affects QMP commands query-cpu-definitions, >>> query-cpu-model-expansion, query-cpu-model-baseline, >>> query-cpu-model-comparison, and the error message when >>> s390_realize_cpu_model() fails in check_compatibility(). >>> >>> * s390_realize_cpu_model() misidentifies it in check_consistency() >>> warnings. >>> >>> * s390_cpu_list() likewise. Affects -cpu help. >>> >>> * s390_cpu_model_register_props() creates CPU property >>> "pcc-cmac-eaes-256" twice. The second one fails, but the error is >>> ignored (a later commit will change that). Results in a single >>> property "pcc-cmac-eaes-256" with the description for >>> S390_FEAT_PCC_CMAC_AES_256, and no property for >>> S390_FEAT_PCC_CMAC_EAES_256. CPU properties are visible in CLI -cpu >>> and -device, QMP & HMP device_add, QMP device-list-properties, and >>> QOM introspection. >>> >>> Fix by deleting the wayward 'e'. >> >> Very nice catch - thanks! >> >> While this sounds very bad, it's luckily not that bad in practice >> (currently). >> >> The feature (or rather, both features) is part of the feature group >> "msa4". As long as we have all sub-features part of that group (which is >> usually the case), we will always indicate "msa4" to the user, instead >> of all the separate sub-features. So, expansion, baseline, comparison >> will usually only work with "msa4". >> >> (in addition, current KVM is not capable of actually masking off these >> sub-features, so it will still, always see the feature, even if not >> explicitly specified via "-cpu X,pcc-cmac-aes-256=on) >> >> I think we should do stable backports. > > makes sense, but I would like to do some testing upfront (old QEMU <-> new QEMU So migration does work between a qemu with and without the patch for host-model and custom model=z14.