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Fri, 2 Sep 2022 07:55:34 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 21D9911C04C; Fri, 2 Sep 2022 07:55:34 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 46B5A11C04A; Fri, 2 Sep 2022 07:55:33 +0000 (GMT) Received: from li-c6ac47cc-293c-11b2-a85c-d421c8e4747b.ibm.com.com (unknown [9.171.69.137]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 2 Sep 2022 07:55:33 +0000 (GMT) From: Pierre Morel To: qemu-s390x@nongnu.org Cc: qemu-devel@nongnu.org, borntraeger@de.ibm.com, pasic@linux.ibm.com, richard.henderson@linaro.org, david@redhat.com, thuth@redhat.com, cohuck@redhat.com, mst@redhat.com, pbonzini@redhat.com, kvm@vger.kernel.org, ehabkost@redhat.com, marcel.apfelbaum@gmail.com, eblake@redhat.com, armbru@redhat.com, seiden@linux.ibm.com, nrb@linux.ibm.com, frankja@linux.ibm.com Subject: [PATCH v9 01/10] s390x/cpus: Make absence of multithreading clear Date: Fri, 2 Sep 2022 09:55:22 +0200 Message-Id: <20220902075531.188916-2-pmorel@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220902075531.188916-1-pmorel@linux.ibm.com> References: <20220902075531.188916-1-pmorel@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 9wjthIAysnJIpFXy9njUu6vPrRaDkF8L X-Proofpoint-ORIG-GUID: 97dW2dqaDrzd0LJmsRHiblBS3QS8yEH5 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-09-01_12,2022-08-31_03,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 impostorscore=0 mlxscore=0 bulkscore=0 priorityscore=1501 suspectscore=0 spamscore=0 adultscore=0 lowpriorityscore=0 malwarescore=0 clxscore=1015 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2209020034 Received-SPF: pass client-ip=148.163.156.1; envelope-from=pmorel@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, T_SCC_BODY_TEXT_LINE=-0.01 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: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" S390x do not support multithreading in the guest. Do not let admin falsely specify multithreading on QEMU smp commandline. Signed-off-by: Pierre Morel --- hw/s390x/s390-virtio-ccw.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index 70229b102b..b5ca154e2f 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -86,6 +86,9 @@ static void s390_init_cpus(MachineState *machine) MachineClass *mc = MACHINE_GET_CLASS(machine); int i; + /* Explicitely do not support threads */ + assert(machine->smp.threads == 1); + /* initialize possible_cpus */ mc->possible_cpu_arch_ids(machine);