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Thu, 3 Nov 2022 17:01:56 +0000 (GMT) Received: from li-c6ac47cc-293c-11b2-a85c-d421c8e4747b.ibm.com (unknown [9.152.222.245]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 5070852051; Thu, 3 Nov 2022 17:01:56 +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, scgl@linux.ibm.com, frankja@linux.ibm.com, berrange@redhat.com, clg@kaod.org Subject: [PATCH v11 10/11] s390x/cpu_topology: activating CPU topology Date: Thu, 3 Nov 2022 18:01:49 +0100 Message-Id: <20221103170150.20789-11-pmorel@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20221103170150.20789-1-pmorel@linux.ibm.com> References: <20221103170150.20789-1-pmorel@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: g9EXWYKGfSe1F0_RhAzynxfiUUc0tnG1 X-Proofpoint-ORIG-GUID: ixm1QSktB5oJwbGKBxxmaBhk6-aJ8vEz X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-11-03_04,2022-11-03_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 lowpriorityscore=0 spamscore=0 bulkscore=0 phishscore=0 mlxscore=0 suspectscore=0 priorityscore=1501 malwarescore=0 adultscore=0 clxscore=1015 mlxlogscore=873 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2211030110 Received-SPF: pass client-ip=148.163.158.5; envelope-from=pmorel@linux.ibm.com; helo=mx0b-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, 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: , Sender: "Qemu-devel" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org The KVM capability, KVM_CAP_S390_CPU_TOPOLOGY is used to activate the S390_FEAT_CONFIGURATION_TOPOLOGY feature and the topology facility for the guest in the case the topology is available in QEMU and in KVM. Signed-off-by: Pierre Morel --- target/s390x/kvm/kvm.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c index a79fdf1c79..724758680b 100644 --- a/target/s390x/kvm/kvm.c +++ b/target/s390x/kvm/kvm.c @@ -2471,6 +2471,22 @@ void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp) set_bit(S390_FEAT_UNPACK, model->features); } + /* + * If we have the CPU Topology allowed in QEMU and + * implemented in KVM, activate the CPU TOPOLOGY feature. + */ + if (s390_has_topology()) { + if (!kvm_check_extension(kvm_state, KVM_CAP_S390_CPU_TOPOLOGY)) { + error_setg(errp, "KVM: S390 topology not present in kernel"); + return; + } + if (kvm_vm_enable_cap(kvm_state, KVM_CAP_S390_CPU_TOPOLOGY, 0) < 0) { + error_setg(errp, "KVM: Error enabling KVM_CAP_S390_CPU_TOPOLOGY"); + return; + } + set_bit(S390_FEAT_CONFIGURATION_TOPOLOGY, model->features); + } + /* We emulate a zPCI bus and AEN, therefore we don't need HW support */ set_bit(S390_FEAT_ZPCI, model->features); set_bit(S390_FEAT_ADAPTER_EVENT_NOTIFICATION, model->features);