From patchwork Tue Apr 25 16:14:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 13223479 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CE456C77B73 for ; Tue, 25 Apr 2023 16:15:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234732AbjDYQPo (ORCPT ); Tue, 25 Apr 2023 12:15:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49932 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234718AbjDYQPm (ORCPT ); Tue, 25 Apr 2023 12:15:42 -0400 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 300CE161AC for ; Tue, 25 Apr 2023 09:15:35 -0700 (PDT) Received: from pps.filterd (m0353722.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 33PGAGaI025689; Tue, 25 Apr 2023 16:15:12 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=VSbTYSiMpbmqeQLpTuPrgujuzKE63pLOQbh4zIRfEC4=; b=qyj3XqPQHj+TsJAyu5u/X1PnzNx942rd4noWJwx5Mbh0Qxo0BIH3sHHvE+622N38OZur QyrBi0uQNwLh2NLME6x6JJKLdxovPKor5EbL+xip+jOXGChVpxYDcNuPCvbkiPuegM+w 2RKzNJVSU35f1aw7t/CtT2vF+Ct8AQxdTWdqKkWO9liY2hTuD2Q2xLpuGeUsKPPsVxIg abmdALdY5VJmdI/7LWZXR08VTE85pvrbfmZCQnFTLSwi0mZSOf8RxWyY0sOJaqNFo8Nq Bt3T339SgY5z81gl3xTsweSnh51/b50wex+qTo1Xr3RE8eaDV6JlPP7Wge8/piSWkzw4 Og== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3q6htbrytj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 25 Apr 2023 16:15:12 +0000 Received: from m0353722.ppops.net (m0353722.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 33PGB8Lt031835; Tue, 25 Apr 2023 16:15:11 GMT Received: from ppma03ams.nl.ibm.com (62.31.33a9.ip4.static.sl-reverse.com [169.51.49.98]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3q6htbryqc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 25 Apr 2023 16:15:11 +0000 Received: from pps.filterd (ppma03ams.nl.ibm.com [127.0.0.1]) by ppma03ams.nl.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 33ONnE4l014781; Tue, 25 Apr 2023 16:15:07 GMT Received: from smtprelay05.fra02v.mail.ibm.com ([9.218.2.225]) by ppma03ams.nl.ibm.com (PPS) with ESMTPS id 3q47771ukv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 25 Apr 2023 16:15:07 +0000 Received: from smtpav07.fra02v.mail.ibm.com (smtpav07.fra02v.mail.ibm.com [10.20.54.106]) by smtprelay05.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 33PGF1Qq26608174 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 25 Apr 2023 16:15:01 GMT Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 02AA520071; Tue, 25 Apr 2023 16:15:01 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4D56720079; Tue, 25 Apr 2023 16:15:00 +0000 (GMT) Received: from li-c6ac47cc-293c-11b2-a85c-d421c8e4747b.ibm.com (unknown [9.152.222.242]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 25 Apr 2023 16:15:00 +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, nsg@linux.ibm.com, frankja@linux.ibm.com, berrange@redhat.com, clg@kaod.org Subject: [PATCH v20 05/21] s390x/cpu topology: resetting the Topology-Change-Report Date: Tue, 25 Apr 2023 18:14:40 +0200 Message-Id: <20230425161456.21031-6-pmorel@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230425161456.21031-1-pmorel@linux.ibm.com> References: <20230425161456.21031-1-pmorel@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 2zFQKSHxJhOP-_T_dBMHlHanx1ZsvRQ2 X-Proofpoint-ORIG-GUID: 9Up1VNcS148oy8-6mpKDAER1xPbhCkWM X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-04-25_07,2023-04-25_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 phishscore=0 suspectscore=0 mlxscore=0 adultscore=0 lowpriorityscore=0 spamscore=0 impostorscore=0 mlxlogscore=999 clxscore=1015 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2304250144 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org During a subsystem reset the Topology-Change-Report is cleared by the machine. Let's ask KVM to clear the Modified Topology Change Report (MTCR) bit of the SCA in the case of a subsystem reset. Signed-off-by: Pierre Morel Reviewed-by: Thomas Huth --- include/hw/s390x/cpu-topology.h | 1 + target/s390x/cpu.h | 1 + target/s390x/kvm/kvm_s390x.h | 1 + hw/s390x/cpu-topology.c | 11 +++++++++++ hw/s390x/s390-virtio-ccw.c | 3 +++ target/s390x/cpu-sysemu.c | 13 +++++++++++++ target/s390x/kvm/kvm.c | 17 +++++++++++++++++ 7 files changed, 47 insertions(+) diff --git a/include/hw/s390x/cpu-topology.h b/include/hw/s390x/cpu-topology.h index 87bfeb631e..a0f891ff31 100644 --- a/include/hw/s390x/cpu-topology.h +++ b/include/hw/s390x/cpu-topology.h @@ -58,6 +58,7 @@ static inline void s390_topology_setup_cpu(MachineState *ms, #endif extern S390Topology s390_topology; +void s390_topology_reset(void); static inline int s390_std_socket(int n, CpuTopology *smp) { diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h index 9f97989bd7..ee101f236b 100644 --- a/target/s390x/cpu.h +++ b/target/s390x/cpu.h @@ -642,6 +642,7 @@ typedef struct SysIBTl_cpu { QEMU_BUILD_BUG_ON(sizeof(SysIBTl_cpu) != 16); void insert_stsi_15_1_x(S390CPU *cpu, int sel2, uint64_t addr, uint8_t ar); +void s390_cpu_topology_set_changed(bool changed); /* MMU defines */ #define ASCE_ORIGIN (~0xfffULL) /* segment table origin */ diff --git a/target/s390x/kvm/kvm_s390x.h b/target/s390x/kvm/kvm_s390x.h index f9785564d0..649dae5948 100644 --- a/target/s390x/kvm/kvm_s390x.h +++ b/target/s390x/kvm/kvm_s390x.h @@ -47,5 +47,6 @@ void kvm_s390_crypto_reset(void); void kvm_s390_restart_interrupt(S390CPU *cpu); void kvm_s390_stop_interrupt(S390CPU *cpu); void kvm_s390_set_diag318(CPUState *cs, uint64_t diag318_info); +int kvm_s390_topology_set_mtcr(uint64_t attr); #endif /* KVM_S390X_H */ diff --git a/hw/s390x/cpu-topology.c b/hw/s390x/cpu-topology.c index 76d0c0fe46..c98439ff7a 100644 --- a/hw/s390x/cpu-topology.c +++ b/hw/s390x/cpu-topology.c @@ -96,6 +96,17 @@ static void s390_topology_init(MachineState *ms) QTAILQ_INSERT_HEAD(&s390_topology.list, entry, next); } +/** + * s390_topology_reset: + * + * Generic reset for CPU topology, calls s390_topology_reset() + * to reset the kernel Modified Topology Change Record. + */ +void s390_topology_reset(void) +{ + s390_cpu_topology_set_changed(false); +} + /** * s390_topology_cpu_default: * @cpu: pointer to a S390CPU diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index 9df60ac447..7e6d88e23c 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -123,6 +123,9 @@ static void subsystem_reset(void) device_cold_reset(dev); } } + if (s390_has_topology()) { + s390_topology_reset(); + } } static int virtio_ccw_hcall_notify(const uint64_t *args) diff --git a/target/s390x/cpu-sysemu.c b/target/s390x/cpu-sysemu.c index 948e4bd3e0..9d41acfe1a 100644 --- a/target/s390x/cpu-sysemu.c +++ b/target/s390x/cpu-sysemu.c @@ -306,3 +306,16 @@ void s390_do_cpu_set_diag318(CPUState *cs, run_on_cpu_data arg) kvm_s390_set_diag318(cs, arg.host_ulong); } } + +void s390_cpu_topology_set_changed(bool changed) +{ + int ret; + + if (kvm_enabled()) { + ret = kvm_s390_topology_set_mtcr(changed); + if (ret) { + error_report("Failed to set Modified Topology Change Report: %s", + strerror(-ret)); + } + } +} diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c index 5ea358cbb0..bc953151ce 100644 --- a/target/s390x/kvm/kvm.c +++ b/target/s390x/kvm/kvm.c @@ -2592,6 +2592,23 @@ int kvm_s390_get_zpci_op(void) return cap_zpci_op; } +int kvm_s390_topology_set_mtcr(uint64_t attr) +{ + struct kvm_device_attr attribute = { + .group = KVM_S390_VM_CPU_TOPOLOGY, + .attr = attr, + }; + + if (!s390_has_feat(S390_FEAT_CONFIGURATION_TOPOLOGY)) { + return 0; + } + if (!kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_TOPOLOGY, attr)) { + return -ENOTSUP; + } + + return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attribute); +} + void kvm_arch_accel_class_init(ObjectClass *oc) { }