From patchwork Fri Sep 2 07:55:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 12963761 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2B775C54EE9 for ; Fri, 2 Sep 2022 07:58:00 +0000 (UTC) Received: from localhost ([::1]:42392 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oU1Ys-000077-L2 for qemu-devel@archiver.kernel.org; Fri, 02 Sep 2022 03:57:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49458) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oU1Wp-0005ny-8o; Fri, 02 Sep 2022 03:55:52 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:38642) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oU1Wk-0002xv-KP; 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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+qemu-devel=archiver.kernel.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); From patchwork Fri Sep 2 07:55:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 12963771 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id F208DC54EE9 for ; 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Fri, 2 Sep 2022 07:55:34 +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 07:55:34 +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 02/10] s390x/cpu topology: core_id sets s390x CPU topology Date: Fri, 2 Sep 2022 09:55:23 +0200 Message-Id: <20220902075531.188916-3-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: J7_nZLbxsVM6RbRAUVNaDipQVoPoW57O X-Proofpoint-ORIG-GUID: L_m3vNDPGzygN8GDplqOmLLMYyJIDMWb 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 adultscore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 impostorscore=0 mlxlogscore=999 phishscore=0 suspectscore=0 clxscore=1015 mlxscore=0 spamscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2209020034 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, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" In the S390x CPU topology the core_id specifies the CPU address and the position of the core withing the topology. Let's build the topology based on the core_id. Signed-off-by: Pierre Morel --- hw/s390x/cpu-topology.c | 135 ++++++++++++++++++++++++++++++++ hw/s390x/meson.build | 1 + hw/s390x/s390-virtio-ccw.c | 10 +++ include/hw/s390x/cpu-topology.h | 42 ++++++++++ 4 files changed, 188 insertions(+) create mode 100644 hw/s390x/cpu-topology.c create mode 100644 include/hw/s390x/cpu-topology.h diff --git a/hw/s390x/cpu-topology.c b/hw/s390x/cpu-topology.c new file mode 100644 index 0000000000..a6ca006ec5 --- /dev/null +++ b/hw/s390x/cpu-topology.c @@ -0,0 +1,135 @@ +/* + * CPU Topology + * + * Copyright IBM Corp. 2022 + * Author(s): Pierre Morel + + * This work is licensed under the terms of the GNU GPL, version 2 or (at + * your option) any later version. See the COPYING file in the top-level + * directory. + */ + +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "qemu/error-report.h" +#include "hw/sysbus.h" +#include "hw/qdev-properties.h" +#include "hw/boards.h" +#include "qemu/typedefs.h" +#include "target/s390x/cpu.h" +#include "hw/s390x/s390-virtio-ccw.h" +#include "hw/s390x/cpu-topology.h" + +S390Topology *s390_get_topology(void) +{ + static S390Topology *s390Topology; + + if (!s390Topology) { + s390Topology = S390_CPU_TOPOLOGY( + object_resolve_path(TYPE_S390_CPU_TOPOLOGY, NULL)); + } + + return s390Topology; +} + +/* + * s390_topology_new_cpu: + * @core_id: the core ID is machine wide + * + * The topology returned by s390_get_topology(), gives us the CPU + * topology established by the -smp QEMU aruments. + * The core-id gives: + * - the Container TLE (Topology List Entry) containing the CPU TLE. + * - in the CPU TLE the origin, or offset of the first bit in the core mask + * - the bit in the CPU TLE core mask + */ +void s390_topology_new_cpu(int core_id) +{ + S390Topology *topo = s390_get_topology(); + int socket_id; + int bit, origin; + + /* In the case no Topology is used nothing is to be done here */ + if (!topo) { + return; + } + + socket_id = core_id / topo->cores; + + bit = core_id; + origin = bit / 64; + bit %= 64; + bit = 63 - bit; + + /* + * At the core level, each CPU is represented by a bit in a 64bit + * unsigned long. Set on plug and clear on unplug of a CPU. + * The firmware assume that all CPU in a CPU TLE have the same + * type, polarization and are all dedicated or shared. + * In the case a socket contains CPU with different type, polarization + * or entitlement then they will be defined in different CPU containers. + * Currently we assume all CPU are identical IFL CPUs and that they are + * all dedicated CPUs. + * The only reason to have several S390TopologyCores inside a socket is + * to have more than 64 CPUs. + * In that case the origin field, representing the offset of the first CPU + * in the CPU container allows to represent up to the maximal number of + * CPU inside several CPU containers inside the socket container. + */ + topo->socket[socket_id].active_count++; + topo->tle[socket_id].active_count++; + set_bit(bit, &topo->tle[socket_id].mask[origin]); +} + +/** + * s390_topology_realize: + * @dev: the device state + * @errp: the error pointer (not used) + * + * During realize the machine CPU topology is initialized with the + * QEMU -smp parameters. + * The maximum count of CPU TLE in the all Topology can not be greater + * than the maximum CPUs. + */ +static void s390_topology_realize(DeviceState *dev, Error **errp) +{ + MachineState *ms = MACHINE(qdev_get_machine()); + S390Topology *topo = S390_CPU_TOPOLOGY(dev); + int n; + + topo->sockets = ms->smp.sockets; + topo->cores = ms->smp.cores; + topo->tles = ms->smp.max_cpus; + + n = topo->sockets; + topo->socket = g_malloc0(n * sizeof(S390TopoContainer)); + topo->tle = g_malloc0(topo->tles * sizeof(S390TopoTLE)); +} + +/** + * topology_class_init: + * @oc: Object class + * @data: (not used) + * + * A very simple object we will need for reset and migration. + */ +static void topology_class_init(ObjectClass *oc, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(oc); + + dc->realize = s390_topology_realize; + set_bit(DEVICE_CATEGORY_MISC, dc->categories); +} + +static const TypeInfo cpu_topology_info = { + .name = TYPE_S390_CPU_TOPOLOGY, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(S390Topology), + .class_init = topology_class_init, +}; + +static void topology_register(void) +{ + type_register_static(&cpu_topology_info); +} +type_init(topology_register); diff --git a/hw/s390x/meson.build b/hw/s390x/meson.build index de28a90a57..96d7d7d231 100644 --- a/hw/s390x/meson.build +++ b/hw/s390x/meson.build @@ -2,6 +2,7 @@ s390x_ss = ss.source_set() s390x_ss.add(files( 'ap-bridge.c', 'ap-device.c', + 'cpu-topology.c', 'ccw-device.c', 'css-bridge.c', 'css.c', diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index b5ca154e2f..15cefd104b 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -43,6 +43,7 @@ #include "sysemu/sysemu.h" #include "hw/s390x/pv.h" #include "migration/blocker.h" +#include "hw/s390x/cpu-topology.h" static Error *pv_mig_blocker; @@ -247,6 +248,12 @@ static void ccw_init(MachineState *machine) /* init memory + setup max page size. Required for the CPU model */ s390_memory_init(machine->ram); + /* Adding the topology must be done before CPU intialization*/ + dev = qdev_new(TYPE_S390_CPU_TOPOLOGY); + object_property_add_child(qdev_get_machine(), TYPE_S390_CPU_TOPOLOGY, + OBJECT(dev)); + sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); + /* init CPUs (incl. CPU model) early so s390_has_feature() works */ s390_init_cpus(machine); @@ -309,6 +316,9 @@ static void s390_cpu_plug(HotplugHandler *hotplug_dev, g_assert(!ms->possible_cpus->cpus[cpu->env.core_id].cpu); ms->possible_cpus->cpus[cpu->env.core_id].cpu = OBJECT(dev); + /* Inserting the CPU in the Topology can not fail */ + s390_topology_new_cpu(cpu->env.core_id); + if (dev->hotplugged) { raise_irq_cpu_hotplug(); } diff --git a/include/hw/s390x/cpu-topology.h b/include/hw/s390x/cpu-topology.h new file mode 100644 index 0000000000..6911f975f4 --- /dev/null +++ b/include/hw/s390x/cpu-topology.h @@ -0,0 +1,42 @@ +/* + * CPU Topology + * + * Copyright 2022 IBM Corp. + * + * This work is licensed under the terms of the GNU GPL, version 2 or (at + * your option) any later version. See the COPYING file in the top-level + * directory. + */ +#ifndef HW_S390X_CPU_TOPOLOGY_H +#define HW_S390X_CPU_TOPOLOGY_H + +typedef struct S390TopoContainer { + int active_count; +} S390TopoContainer; + +#define S390_TOPOLOGY_MAX_ORIGIN (1 + S390_MAX_CPUS / 64) +typedef struct S390TopoTLE { + int active_count; + uint64_t mask[S390_TOPOLOGY_MAX_ORIGIN]; +} S390TopoTLE; + +#include "hw/qdev-core.h" +#include "qom/object.h" + +struct S390Topology { + SysBusDevice parent_obj; + int sockets; + int cores; + int tles; + S390TopoContainer *socket; + S390TopoTLE *tle; +}; +typedef struct S390Topology S390Topology; + +#define TYPE_S390_CPU_TOPOLOGY "s390-topology" +OBJECT_DECLARE_SIMPLE_TYPE(S390Topology, S390_CPU_TOPOLOGY) + +S390Topology *s390_get_topology(void); +void s390_topology_new_cpu(int core_id); + +#endif From patchwork Fri Sep 2 07:55:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 12963763 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 63899ECAAA1 for ; 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Fri, 2 Sep 2022 07:55:35 +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 07:55:35 +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 03/10] s390x/cpu topology: reporting the CPU topology to the guest Date: Fri, 2 Sep 2022 09:55:24 +0200 Message-Id: <20220902075531.188916-4-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: D6jV75HXCIyN8-9f02l-LEzEz2MkCd9U X-Proofpoint-ORIG-GUID: dSDYw8IBB753ViIu_F_tS2EG7ZlH8L57 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The guest can use the STSI instruction to get a buffer filled with the CPU topology description. Let us implement the STSI instruction for the basis CPU topology level, level 2. Signed-off-by: Pierre Morel --- hw/s390x/cpu-topology.c | 4 ++ include/hw/s390x/cpu-topology.h | 5 ++ target/s390x/cpu.h | 49 +++++++++++++++ target/s390x/cpu_topology.c | 108 ++++++++++++++++++++++++++++++++ target/s390x/kvm/kvm.c | 6 +- target/s390x/meson.build | 1 + 6 files changed, 172 insertions(+), 1 deletion(-) create mode 100644 target/s390x/cpu_topology.c diff --git a/hw/s390x/cpu-topology.c b/hw/s390x/cpu-topology.c index a6ca006ec5..e2fd5c7e44 100644 --- a/hw/s390x/cpu-topology.c +++ b/hw/s390x/cpu-topology.c @@ -76,9 +76,11 @@ void s390_topology_new_cpu(int core_id) * in the CPU container allows to represent up to the maximal number of * CPU inside several CPU containers inside the socket container. */ + qemu_mutex_lock(&topo->topo_mutex); topo->socket[socket_id].active_count++; topo->tle[socket_id].active_count++; set_bit(bit, &topo->tle[socket_id].mask[origin]); + qemu_mutex_unlock(&topo->topo_mutex); } /** @@ -104,6 +106,8 @@ static void s390_topology_realize(DeviceState *dev, Error **errp) n = topo->sockets; topo->socket = g_malloc0(n * sizeof(S390TopoContainer)); topo->tle = g_malloc0(topo->tles * sizeof(S390TopoTLE)); + + qemu_mutex_init(&topo->topo_mutex); } /** diff --git a/include/hw/s390x/cpu-topology.h b/include/hw/s390x/cpu-topology.h index 6911f975f4..0b7f3d10b2 100644 --- a/include/hw/s390x/cpu-topology.h +++ b/include/hw/s390x/cpu-topology.h @@ -10,6 +10,10 @@ #ifndef HW_S390X_CPU_TOPOLOGY_H #define HW_S390X_CPU_TOPOLOGY_H +#define S390_TOPOLOGY_CPU_TYPE 0x03 + +#define S390_TOPOLOGY_POLARITY_H 0x00 + typedef struct S390TopoContainer { int active_count; } S390TopoContainer; @@ -30,6 +34,7 @@ struct S390Topology { int tles; S390TopoContainer *socket; S390TopoTLE *tle; + QemuMutex topo_mutex; }; typedef struct S390Topology S390Topology; diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h index 7d6d01325b..c61fe9b563 100644 --- a/target/s390x/cpu.h +++ b/target/s390x/cpu.h @@ -565,6 +565,53 @@ typedef union SysIB { } SysIB; QEMU_BUILD_BUG_ON(sizeof(SysIB) != 4096); +/* CPU type Topology List Entry */ +typedef struct SysIBTl_cpu { + uint8_t nl; + uint8_t reserved0[3]; + uint8_t reserved1:5; + uint8_t dedicated:1; + uint8_t polarity:2; + uint8_t type; + uint16_t origin; + uint64_t mask; +} SysIBTl_cpu; +QEMU_BUILD_BUG_ON(sizeof(SysIBTl_cpu) != 16); + +/* Container type Topology List Entry */ +typedef struct SysIBTl_container { + uint8_t nl; + uint8_t reserved[6]; + uint8_t id; +} QEMU_PACKED SysIBTl_container; +QEMU_BUILD_BUG_ON(sizeof(SysIBTl_container) != 8); + +/* Generic Topology List Entry */ +typedef union SysIBTl_entry { + uint8_t nl; + SysIBTl_container container; + SysIBTl_cpu cpu; +} SysIBTl_entry; + +#define TOPOLOGY_NR_MAG 6 +#define TOPOLOGY_NR_MAG6 0 +#define TOPOLOGY_NR_MAG5 1 +#define TOPOLOGY_NR_MAG4 2 +#define TOPOLOGY_NR_MAG3 3 +#define TOPOLOGY_NR_MAG2 4 +#define TOPOLOGY_NR_MAG1 5 +/* Configuration topology */ +typedef struct SysIB_151x { + uint8_t reserved0[2]; + uint16_t length; + uint8_t mag[TOPOLOGY_NR_MAG]; + uint8_t reserved1; + uint8_t mnest; + uint32_t reserved2; + SysIBTl_entry tle[0]; +} SysIB_151x; +QEMU_BUILD_BUG_ON(sizeof(SysIB_151x) != 16); + /* MMU defines */ #define ASCE_ORIGIN (~0xfffULL) /* segment table origin */ #define ASCE_SUBSPACE 0x200 /* subspace group control */ @@ -843,4 +890,6 @@ S390CPU *s390_cpu_addr2state(uint16_t cpu_addr); #include "exec/cpu-all.h" +void insert_stsi_15_1_x(S390CPU *cpu, int sel2, __u64 addr, uint8_t ar); + #endif diff --git a/target/s390x/cpu_topology.c b/target/s390x/cpu_topology.c new file mode 100644 index 0000000000..56865dafc6 --- /dev/null +++ b/target/s390x/cpu_topology.c @@ -0,0 +1,108 @@ +/* + * QEMU S390x CPU Topology + * + * Copyright IBM Corp. 2022 + * Author(s): Pierre Morel + * + * This work is licensed under the terms of the GNU GPL, version 2 or (at + * your option) any later version. See the COPYING file in the top-level + * directory. + */ +#include "qemu/osdep.h" +#include "cpu.h" +#include "hw/s390x/pv.h" +#include "hw/sysbus.h" +#include "hw/s390x/cpu-topology.h" +#include "hw/s390x/sclp.h" + +static char *fill_container(char *p, int level, int id) +{ + SysIBTl_container *tle = (SysIBTl_container *)p; + + tle->nl = level; + tle->id = id; + return p + sizeof(*tle); +} + +static char *fill_tle_cpu(char *p, uint64_t mask, int origin) +{ + SysIBTl_cpu *tle = (SysIBTl_cpu *)p; + + tle->nl = 0; + tle->dedicated = 1; + tle->polarity = S390_TOPOLOGY_POLARITY_H; + tle->type = S390_TOPOLOGY_CPU_TYPE; + tle->origin = origin * 64; + tle->mask = be64_to_cpu(mask); + return p + sizeof(*tle); +} + +static char *s390_top_set_level2(S390Topology *topo, char *p) +{ + int i, origin; + + for (i = 0; i < topo->sockets; i++) { + if (!topo->socket[i].active_count) { + continue; + } + p = fill_container(p, 1, i); + for (origin = 0; origin < S390_TOPOLOGY_MAX_ORIGIN; origin++) { + uint64_t mask = 0L; + + mask = be64_to_cpu(topo->tle[i].mask[origin]); + if (mask) { + p = fill_tle_cpu(p, mask, origin); + } + } + } + return p; +} + +static int setup_stsi(SysIB_151x *sysib, int level) +{ + S390Topology *topo = s390_get_topology(); + char *p = (char *)sysib->tle; + + qemu_mutex_lock(&topo->topo_mutex); + + sysib->mnest = level; + switch (level) { + case 2: + sysib->mag[TOPOLOGY_NR_MAG2] = topo->sockets; + sysib->mag[TOPOLOGY_NR_MAG1] = topo->cores; + p = s390_top_set_level2(topo, p); + break; + } + + qemu_mutex_unlock(&topo->topo_mutex); + + return p - (char *)sysib->tle; +} + +#define S390_TOPOLOGY_MAX_MNEST 2 +void insert_stsi_15_1_x(S390CPU *cpu, int sel2, __u64 addr, uint8_t ar) +{ + SysIB_151x *sysib; + int len = sizeof(*sysib); + + if (s390_is_pv() || sel2 < 2 || sel2 > S390_TOPOLOGY_MAX_MNEST) { + setcc(cpu, 3); + return; + } + + sysib = g_malloc0(TARGET_PAGE_SIZE); + + len += setup_stsi(sysib, sel2); + if (len > TARGET_PAGE_SIZE) { + setcc(cpu, 3); + goto out_free; + } + + sysib->length = be16_to_cpu(len); + s390_cpu_virt_mem_write(cpu, addr, ar, sysib, len); + setcc(cpu, 0); + +out_free: + g_free(sysib); +} + diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c index 6a8dbadf7e..f96630440b 100644 --- a/target/s390x/kvm/kvm.c +++ b/target/s390x/kvm/kvm.c @@ -51,6 +51,7 @@ #include "hw/s390x/s390-virtio-ccw.h" #include "hw/s390x/s390-virtio-hcall.h" #include "hw/s390x/pv.h" +#include "hw/s390x/cpu-topology.h" #ifndef DEBUG_KVM #define DEBUG_KVM 0 @@ -1917,9 +1918,12 @@ static int handle_stsi(S390CPU *cpu) if (run->s390_stsi.sel1 != 2 || run->s390_stsi.sel2 != 2) { return 0; } - /* Only sysib 3.2.2 needs post-handling for now. */ insert_stsi_3_2_2(cpu, run->s390_stsi.addr, run->s390_stsi.ar); return 0; + case 15: + insert_stsi_15_1_x(cpu, run->s390_stsi.sel2, run->s390_stsi.addr, + run->s390_stsi.ar); + return 0; default: return 0; } diff --git a/target/s390x/meson.build b/target/s390x/meson.build index 84c1402a6a..890ccfa789 100644 --- a/target/s390x/meson.build +++ b/target/s390x/meson.build @@ -29,6 +29,7 @@ s390x_softmmu_ss.add(files( 'sigp.c', 'cpu-sysemu.c', 'cpu_models_sysemu.c', + 'cpu_topology.c', )) s390x_user_ss = ss.source_set() From patchwork Fri Sep 2 07:55:25 2022 Content-Type: text/plain; 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Fri, 2 Sep 2022 07:55:36 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0AC4F11C04C; Fri, 2 Sep 2022 07:55:36 +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 07:55:35 +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 04/10] hw/core: introducing drawer and books for s390x Date: Fri, 2 Sep 2022 09:55:25 +0200 Message-Id: <20220902075531.188916-5-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: sasZKcsdoopJ5tSdAg7jBED1DDrogeLW X-Proofpoint-ORIG-GUID: AkDxnOLAVwe8w2JJAuqPpb7uujGYf63X 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 spamscore=0 impostorscore=0 priorityscore=1501 malwarescore=0 adultscore=0 mlxlogscore=999 clxscore=1015 phishscore=0 suspectscore=0 mlxscore=0 bulkscore=0 lowpriorityscore=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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" S390x defines two topology levels above sockets: nbooks and drawers. Let's add these two levels inside the CPU topology implementation. Signed-off-by: Pierre Morel --- hw/core/machine-smp.c | 48 ++++++++++++++++++++++++++++++++++++------- hw/core/machine.c | 4 ++++ include/hw/boards.h | 8 ++++++++ qapi/machine.json | 14 +++++++++++-- qemu-options.hx | 6 ++++-- softmmu/vl.c | 6 ++++++ 6 files changed, 75 insertions(+), 11 deletions(-) diff --git a/hw/core/machine-smp.c b/hw/core/machine-smp.c index b39ed21e65..26150c748f 100644 --- a/hw/core/machine-smp.c +++ b/hw/core/machine-smp.c @@ -31,6 +31,14 @@ static char *cpu_hierarchy_to_string(MachineState *ms) MachineClass *mc = MACHINE_GET_CLASS(ms); GString *s = g_string_new(NULL); + if (mc->smp_props.drawers_supported) { + g_string_append_printf(s, " * drawers (%u)", ms->smp.drawers); + } + + if (mc->smp_props.books_supported) { + g_string_append_printf(s, " * books (%u)", ms->smp.books); + } + g_string_append_printf(s, "sockets (%u)", ms->smp.sockets); if (mc->smp_props.dies_supported) { @@ -73,6 +81,8 @@ void machine_parse_smp_config(MachineState *ms, { MachineClass *mc = MACHINE_GET_CLASS(ms); unsigned cpus = config->has_cpus ? config->cpus : 0; + unsigned drawers = config->has_drawers ? config->drawers : 0; + unsigned books = config->has_books ? config->books : 0; unsigned sockets = config->has_sockets ? config->sockets : 0; unsigned dies = config->has_dies ? config->dies : 0; unsigned clusters = config->has_clusters ? config->clusters : 0; @@ -85,6 +95,8 @@ void machine_parse_smp_config(MachineState *ms, * explicit configuration like "cpus=0" is not allowed. */ if ((config->has_cpus && config->cpus == 0) || + (config->has_drawers && config->drawers == 0) || + (config->has_books && config->books == 0) || (config->has_sockets && config->sockets == 0) || (config->has_dies && config->dies == 0) || (config->has_clusters && config->clusters == 0) || @@ -111,6 +123,20 @@ void machine_parse_smp_config(MachineState *ms, dies = dies > 0 ? dies : 1; clusters = clusters > 0 ? clusters : 1; + if (!mc->smp_props.books_supported && books > 1) { + error_setg(errp, "books not supported by this machine's CPU topology"); + return; + } + + books = books > 0 ? books : 1; + + if (!mc->smp_props.drawers_supported && drawers > 1) { + error_setg(errp, "drawers not supported by this machine's CPU topology"); + return; + } + + drawers = drawers > 0 ? drawers : 1; + /* compute missing values based on the provided ones */ if (cpus == 0 && maxcpus == 0) { sockets = sockets > 0 ? sockets : 1; @@ -124,33 +150,41 @@ void machine_parse_smp_config(MachineState *ms, if (sockets == 0) { cores = cores > 0 ? cores : 1; threads = threads > 0 ? threads : 1; - sockets = maxcpus / (dies * clusters * cores * threads); + sockets = maxcpus / + (drawers * books * dies * clusters * cores * threads); } else if (cores == 0) { threads = threads > 0 ? threads : 1; - cores = maxcpus / (sockets * dies * clusters * threads); + cores = maxcpus / + (drawers * books * sockets * dies * clusters * threads); } } else { /* prefer cores over sockets since 6.2 */ if (cores == 0) { sockets = sockets > 0 ? sockets : 1; threads = threads > 0 ? threads : 1; - cores = maxcpus / (sockets * dies * clusters * threads); + cores = maxcpus / + (drawers * books * sockets * dies * clusters * threads); } else if (sockets == 0) { threads = threads > 0 ? threads : 1; - sockets = maxcpus / (dies * clusters * cores * threads); + sockets = maxcpus / + (drawers * books * dies * clusters * cores * threads); } } /* try to calculate omitted threads at last */ if (threads == 0) { - threads = maxcpus / (sockets * dies * clusters * cores); + threads = maxcpus / + (drawers * books * sockets * dies * clusters * cores); } } - maxcpus = maxcpus > 0 ? maxcpus : sockets * dies * clusters * cores * threads; + maxcpus = maxcpus > 0 ? maxcpus : drawers * books * sockets * dies * + clusters * cores * threads; cpus = cpus > 0 ? cpus : maxcpus; ms->smp.cpus = cpus; + ms->smp.drawers = drawers; + ms->smp.books = books; ms->smp.sockets = sockets; ms->smp.dies = dies; ms->smp.clusters = clusters; @@ -159,7 +193,7 @@ void machine_parse_smp_config(MachineState *ms, ms->smp.max_cpus = maxcpus; /* sanity-check of the computed topology */ - if (sockets * dies * clusters * cores * threads != maxcpus) { + if (drawers * books * sockets * dies * clusters * cores * threads != maxcpus) { g_autofree char *topo_msg = cpu_hierarchy_to_string(ms); error_setg(errp, "Invalid CPU topology: " "product of the hierarchy must match maxcpus: " diff --git a/hw/core/machine.c b/hw/core/machine.c index a673302cce..4c5c8d1655 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -821,6 +821,8 @@ static void machine_get_smp(Object *obj, Visitor *v, const char *name, MachineState *ms = MACHINE(obj); SMPConfiguration *config = &(SMPConfiguration){ .has_cpus = true, .cpus = ms->smp.cpus, + .has_drawers = true, .drawers = ms->smp.drawers, + .has_books = true, .books = ms->smp.books, .has_sockets = true, .sockets = ms->smp.sockets, .has_dies = true, .dies = ms->smp.dies, .has_clusters = true, .clusters = ms->smp.clusters, @@ -1087,6 +1089,8 @@ static void machine_initfn(Object *obj) /* default to mc->default_cpus */ ms->smp.cpus = mc->default_cpus; ms->smp.max_cpus = mc->default_cpus; + ms->smp.drawers = 1; + ms->smp.books = 1; ms->smp.sockets = 1; ms->smp.dies = 1; ms->smp.clusters = 1; diff --git a/include/hw/boards.h b/include/hw/boards.h index 7b416c9787..69e20c1252 100644 --- a/include/hw/boards.h +++ b/include/hw/boards.h @@ -130,11 +130,15 @@ typedef struct { * @prefer_sockets - whether sockets are preferred over cores in smp parsing * @dies_supported - whether dies are supported by the machine * @clusters_supported - whether clusters are supported by the machine + * @books_supported - whether books are supported by the machine + * @drawers_supported - whether drawers are supported by the machine */ typedef struct { bool prefer_sockets; bool dies_supported; bool clusters_supported; + bool books_supported; + bool drawers_supported; } SMPCompatProps; /** @@ -299,6 +303,8 @@ typedef struct DeviceMemoryState { /** * CpuTopology: * @cpus: the number of present logical processors on the machine + * @drawers: the number of drawers on the machine + * @books: the number of books on the machine * @sockets: the number of sockets on the machine * @dies: the number of dies in one socket * @clusters: the number of clusters in one die @@ -308,6 +314,8 @@ typedef struct DeviceMemoryState { */ typedef struct CpuTopology { unsigned int cpus; + unsigned int drawers; + unsigned int books; unsigned int sockets; unsigned int dies; unsigned int clusters; diff --git a/qapi/machine.json b/qapi/machine.json index 6afd1936b0..bdd92e3cb1 100644 --- a/qapi/machine.json +++ b/qapi/machine.json @@ -900,13 +900,15 @@ # a CPU is being hotplugged. # # @node-id: NUMA node ID the CPU belongs to -# @socket-id: socket number within node/board the CPU belongs to +# @drawer-id: drawer number within node/board the CPU belongs to +# @book-id: book number within drawer/node/board the CPU belongs to +# @socket-id: socket number within book/node/board the CPU belongs to # @die-id: die number within socket the CPU belongs to (since 4.1) # @cluster-id: cluster number within die the CPU belongs to (since 7.1) # @core-id: core number within cluster the CPU belongs to # @thread-id: thread number within core the CPU belongs to # -# Note: currently there are 6 properties that could be present +# Note: currently there are 7 properties that could be present # but management should be prepared to pass through other # properties with device_add command to allow for future # interface extension. This also requires the filed names to be kept in @@ -916,6 +918,8 @@ ## { 'struct': 'CpuInstanceProperties', 'data': { '*node-id': 'int', + '*drawer-id': 'int', + '*book-id': 'int', '*socket-id': 'int', '*die-id': 'int', '*cluster-id': 'int', @@ -1465,6 +1469,10 @@ # # @cpus: number of virtual CPUs in the virtual machine # +# @drawers: number of drawers in the CPU topology +# +# @books: number of books in the CPU topology +# # @sockets: number of sockets in the CPU topology # # @dies: number of dies per socket in the CPU topology @@ -1481,6 +1489,8 @@ ## { 'struct': 'SMPConfiguration', 'data': { '*cpus': 'int', + '*drawers': 'int', + '*books': 'int', '*sockets': 'int', '*dies': 'int', '*clusters': 'int', diff --git a/qemu-options.hx b/qemu-options.hx index 311e75a98e..e78e51ab49 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -245,11 +245,13 @@ SRST ERST DEF("smp", HAS_ARG, QEMU_OPTION_smp, - "-smp [[cpus=]n][,maxcpus=maxcpus][,sockets=sockets][,dies=dies][,clusters=clusters][,cores=cores][,threads=threads]\n" + "-smp [[cpus=]n][,maxcpus=maxcpus][,drawers=drawers][,books=books][,sockets=sockets][,dies=dies][,clusters=clusters][,cores=cores][,threads=threads]\n" " set the number of initial CPUs to 'n' [default=1]\n" " maxcpus= maximum number of total CPUs, including\n" " offline CPUs for hotplug, etc\n" - " sockets= number of sockets on the machine board\n" + " drawers= number of drawers on the machine board\n" + " books= number of books in one drawer\n" + " sockets= number of sockets in one book\n" " dies= number of dies in one socket\n" " clusters= number of clusters in one die\n" " cores= number of cores in one cluster\n" diff --git a/softmmu/vl.c b/softmmu/vl.c index 706bd7cff7..80ea35fa26 100644 --- a/softmmu/vl.c +++ b/softmmu/vl.c @@ -726,6 +726,12 @@ static QemuOptsList qemu_smp_opts = { { .name = "cpus", .type = QEMU_OPT_NUMBER, + }, { + .name = "drawers", + .type = QEMU_OPT_NUMBER, + }, { + .name = "books", + .type = QEMU_OPT_NUMBER, }, { .name = "sockets", .type = QEMU_OPT_NUMBER, From patchwork Fri Sep 2 07:55:26 2022 Content-Type: text/plain; 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Fri, 2 Sep 2022 07:55:37 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E54C811C04C; Fri, 2 Sep 2022 07:55:36 +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 07:55:36 +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 05/10] s390x/cpu: reporting drawers and books topology to the guest Date: Fri, 2 Sep 2022 09:55:26 +0200 Message-Id: <20220902075531.188916-6-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: ABOE33HbwsckvklSabHo4jqbHjkuwZC_ X-Proofpoint-ORIG-GUID: CZvVaql7Ks0jOJW4EaEjjSiW9g7oXnYB 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 adultscore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 impostorscore=0 mlxlogscore=999 phishscore=0 suspectscore=0 clxscore=1015 mlxscore=0 spamscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2209020034 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, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The guest can ask for a topology report on drawer's or book's level. Let's implement the STSI instruction's handling for the corresponding selector values. Signed-off-by: Pierre Morel --- hw/s390x/cpu-topology.c | 19 +++++++--- hw/s390x/s390-virtio-ccw.c | 2 ++ include/hw/s390x/cpu-topology.h | 7 +++- target/s390x/cpu_topology.c | 64 +++++++++++++++++++++++++++------ 4 files changed, 76 insertions(+), 16 deletions(-) diff --git a/hw/s390x/cpu-topology.c b/hw/s390x/cpu-topology.c index e2fd5c7e44..bb9ae63483 100644 --- a/hw/s390x/cpu-topology.c +++ b/hw/s390x/cpu-topology.c @@ -46,7 +46,7 @@ S390Topology *s390_get_topology(void) void s390_topology_new_cpu(int core_id) { S390Topology *topo = s390_get_topology(); - int socket_id; + int socket_id, book_id, drawer_id; int bit, origin; /* In the case no Topology is used nothing is to be done here */ @@ -55,6 +55,8 @@ void s390_topology_new_cpu(int core_id) } socket_id = core_id / topo->cores; + book_id = socket_id / topo->sockets; + drawer_id = book_id / topo->books; bit = core_id; origin = bit / 64; @@ -77,6 +79,8 @@ void s390_topology_new_cpu(int core_id) * CPU inside several CPU containers inside the socket container. */ qemu_mutex_lock(&topo->topo_mutex); + topo->drawer[drawer_id].active_count++; + topo->book[book_id].active_count++; topo->socket[socket_id].active_count++; topo->tle[socket_id].active_count++; set_bit(bit, &topo->tle[socket_id].mask[origin]); @@ -99,13 +103,20 @@ static void s390_topology_realize(DeviceState *dev, Error **errp) S390Topology *topo = S390_CPU_TOPOLOGY(dev); int n; + topo->drawers = ms->smp.drawers; + topo->books = ms->smp.books; + topo->total_books = topo->books * topo->drawers; topo->sockets = ms->smp.sockets; + topo->total_sockets = topo->sockets * topo->books * topo->drawers; topo->cores = ms->smp.cores; - topo->tles = ms->smp.max_cpus; - n = topo->sockets; + n = topo->drawers; + topo->drawer = g_malloc0(n * sizeof(S390TopoContainer)); + n *= topo->books; + topo->book = g_malloc0(n * sizeof(S390TopoContainer)); + n *= topo->sockets; topo->socket = g_malloc0(n * sizeof(S390TopoContainer)); - topo->tle = g_malloc0(topo->tles * sizeof(S390TopoTLE)); + topo->tle = g_malloc0(n * sizeof(S390TopoTLE)); qemu_mutex_init(&topo->topo_mutex); } diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index 15cefd104b..3f28e28d47 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -626,6 +626,8 @@ static void ccw_machine_class_init(ObjectClass *oc, void *data) hc->unplug_request = s390_machine_device_unplug_request; nc->nmi_monitor_handler = s390_nmi; mc->default_ram_id = "s390.ram"; + mc->smp_props.books_supported = true; + mc->smp_props.drawers_supported = true; } static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp) diff --git a/include/hw/s390x/cpu-topology.h b/include/hw/s390x/cpu-topology.h index 0b7f3d10b2..4f8ac39ca0 100644 --- a/include/hw/s390x/cpu-topology.h +++ b/include/hw/s390x/cpu-topology.h @@ -29,9 +29,14 @@ typedef struct S390TopoTLE { struct S390Topology { SysBusDevice parent_obj; + int total_books; + int total_sockets; + int drawers; + int books; int sockets; int cores; - int tles; + S390TopoContainer *drawer; + S390TopoContainer *book; S390TopoContainer *socket; S390TopoTLE *tle; QemuMutex topo_mutex; diff --git a/target/s390x/cpu_topology.c b/target/s390x/cpu_topology.c index 56865dafc6..305fbb9734 100644 --- a/target/s390x/cpu_topology.c +++ b/target/s390x/cpu_topology.c @@ -37,19 +37,18 @@ static char *fill_tle_cpu(char *p, uint64_t mask, int origin) return p + sizeof(*tle); } -static char *s390_top_set_level2(S390Topology *topo, char *p) +static char *s390_top_set_level2(S390Topology *topo, char *p, int fs, int ns) { - int i, origin; + int socket, origin; + uint64_t mask; - for (i = 0; i < topo->sockets; i++) { - if (!topo->socket[i].active_count) { + for (socket = fs; socket < fs + ns; socket++) { + if (!topo->socket[socket].active_count) { continue; } - p = fill_container(p, 1, i); + p = fill_container(p, 1, socket); for (origin = 0; origin < S390_TOPOLOGY_MAX_ORIGIN; origin++) { - uint64_t mask = 0L; - - mask = be64_to_cpu(topo->tle[i].mask[origin]); + mask = be64_to_cpu(topo->tle[socket].mask[origin]); if (mask) { p = fill_tle_cpu(p, mask, origin); } @@ -58,19 +57,63 @@ static char *s390_top_set_level2(S390Topology *topo, char *p) return p; } +static char *s390_top_set_level3(S390Topology *topo, char *p, int fb, int nb) +{ + int book, fs = 0; + + for (book = fb; book < fb + nb; book++, fs += topo->sockets) { + if (!topo->book[book].active_count) { + continue; + } + p = fill_container(p, 2, book); + p = s390_top_set_level2(topo, p, fs, topo->sockets); + } + return p; +} + +static char *s390_top_set_level4(S390Topology *topo, char *p) +{ + int drawer, fb = 0; + + for (drawer = 0; drawer < topo->drawers; drawer++, fb += topo->books) { + if (!topo->drawer[drawer].active_count) { + continue; + } + p = fill_container(p, 3, drawer); + p = s390_top_set_level3(topo, p, fb, topo->books); + } + return p; +} + static int setup_stsi(SysIB_151x *sysib, int level) { S390Topology *topo = s390_get_topology(); char *p = (char *)sysib->tle; + int max_containers; qemu_mutex_lock(&topo->topo_mutex); sysib->mnest = level; switch (level) { case 2: + max_containers = topo->sockets * topo->books * topo->drawers; + sysib->mag[TOPOLOGY_NR_MAG2] = max_containers; + sysib->mag[TOPOLOGY_NR_MAG1] = topo->cores; + p = s390_top_set_level2(topo, p, 0, max_containers); + break; + case 3: + max_containers = topo->books * topo->drawers; + sysib->mag[TOPOLOGY_NR_MAG3] = max_containers; sysib->mag[TOPOLOGY_NR_MAG2] = topo->sockets; sysib->mag[TOPOLOGY_NR_MAG1] = topo->cores; - p = s390_top_set_level2(topo, p); + p = s390_top_set_level3(topo, p, 0, max_containers); + break; + case 4: + sysib->mag[TOPOLOGY_NR_MAG4] = topo->drawers; + sysib->mag[TOPOLOGY_NR_MAG3] = topo->books; + sysib->mag[TOPOLOGY_NR_MAG2] = topo->sockets; + sysib->mag[TOPOLOGY_NR_MAG1] = topo->cores; + p = s390_top_set_level4(topo, p); break; } @@ -79,7 +122,7 @@ static int setup_stsi(SysIB_151x *sysib, int level) return p - (char *)sysib->tle; } -#define S390_TOPOLOGY_MAX_MNEST 2 +#define S390_TOPOLOGY_MAX_MNEST 4 void insert_stsi_15_1_x(S390CPU *cpu, int sel2, __u64 addr, uint8_t ar) { SysIB_151x *sysib; @@ -105,4 +148,3 @@ void insert_stsi_15_1_x(S390CPU *cpu, int sel2, __u64 addr, uint8_t ar) out_free: g_free(sysib); 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Fri, 2 Sep 2022 07:55:38 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1351411C04C; Fri, 2 Sep 2022 07:55:38 +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 07:55:37 +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 06/10] s390x/cpu_topology: resetting the Topology-Change-Report Date: Fri, 2 Sep 2022 09:55:27 +0200 Message-Id: <20220902075531.188916-7-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: m4NMB07Xs1_X7YRhmMBVscERh49V0KFk X-Proofpoint-ORIG-GUID: hkyFdsd9vxkLRl9R0keFgE0iSIiLMzXY 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 suspectscore=0 phishscore=0 spamscore=0 priorityscore=1501 impostorscore=0 bulkscore=0 lowpriorityscore=0 malwarescore=0 mlxlogscore=999 adultscore=0 clxscore=1015 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2209020034 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, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" 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: Nico Boehr Reviewed-by: Janis Schoetterl-Glausch --- hw/s390x/cpu-topology.c | 12 ++++++++++++ hw/s390x/s390-virtio-ccw.c | 1 + target/s390x/cpu-sysemu.c | 7 +++++++ target/s390x/cpu.h | 1 + target/s390x/kvm/kvm.c | 23 +++++++++++++++++++++++ target/s390x/kvm/kvm_s390x.h | 1 + 6 files changed, 45 insertions(+) diff --git a/hw/s390x/cpu-topology.c b/hw/s390x/cpu-topology.c index bb9ae63483..6098d6ea1f 100644 --- a/hw/s390x/cpu-topology.c +++ b/hw/s390x/cpu-topology.c @@ -121,6 +121,17 @@ static void s390_topology_realize(DeviceState *dev, Error **errp) qemu_mutex_init(&topo->topo_mutex); } +/** + * s390_topology_reset: + * @dev: the device + * + * Calls the sysemu topology reset + */ +static void s390_topology_reset(DeviceState *dev) +{ + s390_cpu_topology_reset(); +} + /** * topology_class_init: * @oc: Object class @@ -134,6 +145,7 @@ static void topology_class_init(ObjectClass *oc, void *data) dc->realize = s390_topology_realize; set_bit(DEVICE_CATEGORY_MISC, dc->categories); + dc->reset = s390_topology_reset; } static const TypeInfo cpu_topology_info = { diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index 3f28e28d47..1fa98740de 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -104,6 +104,7 @@ static const char *const reset_dev_types[] = { "s390-flic", "diag288", TYPE_S390_PCI_HOST_BRIDGE, + TYPE_S390_CPU_TOPOLOGY, }; static void subsystem_reset(void) diff --git a/target/s390x/cpu-sysemu.c b/target/s390x/cpu-sysemu.c index 948e4bd3e0..707c0b658c 100644 --- a/target/s390x/cpu-sysemu.c +++ b/target/s390x/cpu-sysemu.c @@ -306,3 +306,10 @@ 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_reset(void) +{ + if (kvm_enabled()) { + kvm_s390_topology_set_mtcr(0); + } +} diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h index c61fe9b563..cff5cc0415 100644 --- a/target/s390x/cpu.h +++ b/target/s390x/cpu.h @@ -826,6 +826,7 @@ void s390_enable_css_support(S390CPU *cpu); void s390_do_cpu_set_diag318(CPUState *cs, run_on_cpu_data arg); int s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch_id, int vq, bool assign); +void s390_cpu_topology_reset(void); #ifndef CONFIG_USER_ONLY unsigned int s390_cpu_set_state(uint8_t cpu_state, S390CPU *cpu); #else diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c index f96630440b..9c994d27d5 100644 --- a/target/s390x/kvm/kvm.c +++ b/target/s390x/kvm/kvm.c @@ -2585,3 +2585,26 @@ 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, + }; + int ret; + + if (!s390_has_feat(S390_FEAT_CONFIGURATION_TOPOLOGY)) { + return -EFAULT; + } + if (!kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_TOPOLOGY, attr)) { + return -ENOENT; + } + + ret = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attribute); + if (ret) { + error_report("Failed to set cpu topology attribute %lu: %s", + attr, strerror(-ret)); + } + return ret; +} diff --git a/target/s390x/kvm/kvm_s390x.h b/target/s390x/kvm/kvm_s390x.h index aaae8570de..a13c8fb9a3 100644 --- a/target/s390x/kvm/kvm_s390x.h +++ b/target/s390x/kvm/kvm_s390x.h @@ -46,5 +46,6 @@ 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 */ From patchwork Fri Sep 2 07:55:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 12963774 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A7F17ECAAA1 for ; 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Fri, 2 Sep 2022 07:55:38 +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 07:55:38 +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 07/10] s390x/cpu_topology: CPU topology migration Date: Fri, 2 Sep 2022 09:55:28 +0200 Message-Id: <20220902075531.188916-8-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-ORIG-GUID: hCdZCqjwb6aKo4yNynOBAlJ2IXpcCpKw X-Proofpoint-GUID: 4NM2CsKrGgXBAI81l0i0bK6KMC8jesG5 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 mlxscore=0 lowpriorityscore=0 phishscore=0 priorityscore=1501 mlxlogscore=999 impostorscore=0 bulkscore=0 malwarescore=0 clxscore=1015 adultscore=0 spamscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2209020034 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, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The migration can only take place if both source and destination of the migration both use or both do not use the CPU topology facility. We indicate a change in topology during migration postload for the case the topology changed between source and destination. Signed-off-by: Pierre Morel --- hw/s390x/cpu-topology.c | 79 +++++++++++++++++++++++++++++++++ include/hw/s390x/cpu-topology.h | 1 + target/s390x/cpu-sysemu.c | 8 ++++ target/s390x/cpu.h | 1 + 4 files changed, 89 insertions(+) diff --git a/hw/s390x/cpu-topology.c b/hw/s390x/cpu-topology.c index 6098d6ea1f..b6bf839e40 100644 --- a/hw/s390x/cpu-topology.c +++ b/hw/s390x/cpu-topology.c @@ -19,6 +19,7 @@ #include "target/s390x/cpu.h" #include "hw/s390x/s390-virtio-ccw.h" #include "hw/s390x/cpu-topology.h" +#include "migration/vmstate.h" S390Topology *s390_get_topology(void) { @@ -132,6 +133,83 @@ static void s390_topology_reset(DeviceState *dev) s390_cpu_topology_reset(); } +/** + * cpu_topology_postload + * @opaque: a pointer to the S390Topology + * @version_id: version identifier + * + * We check that the topology is used or is not used + * on both side identically. + * + * If the topology is in use we set the Modified Topology Change Report + * on the destination host. + */ +static int cpu_topology_postload(void *opaque, int version_id) +{ + S390Topology *topo = opaque; + int ret; + + if (topo->topology_needed != s390_has_feat(S390_FEAT_CONFIGURATION_TOPOLOGY)) { + if (topo->topology_needed) { + error_report("Topology facility is needed in destination"); + } else { + error_report("Topology facility can not be used in destination"); + } + return -EINVAL; + } + + /* We do not support CPU Topology, all is good */ + if (!s390_has_feat(S390_FEAT_CONFIGURATION_TOPOLOGY)) { + return 0; + } + + /* We support CPU Topology, set the MTCR */ + ret = s390_cpu_topology_mtcr_set(); + if (ret) { + error_report("Failed to set MTCR: %s", strerror(-ret)); + } + return ret; +} + +/** + * cpu_topology_presave: + * @opaque: The pointer to the S390Topology + * + * Save the usage of the CPU Topology in the VM State. + */ +static int cpu_topology_presave(void *opaque) +{ + S390Topology *topo = opaque; + + topo->topology_needed = s390_has_feat(S390_FEAT_CONFIGURATION_TOPOLOGY); + return 0; +} + +/** + * cpu_topology_needed: + * @opaque: The pointer to the S390Topology + * + * If we use the CPU Topology on the source it will be needed on the destination. + */ +static bool cpu_topology_needed(void *opaque) +{ + return s390_has_feat(S390_FEAT_CONFIGURATION_TOPOLOGY); +} + + +const VMStateDescription vmstate_cpu_topology = { + .name = "cpu_topology", + .version_id = 1, + .post_load = cpu_topology_postload, + .pre_save = cpu_topology_presave, + .minimum_version_id = 1, + .needed = cpu_topology_needed, + .fields = (VMStateField[]) { + VMSTATE_BOOL(topology_needed, S390Topology), + VMSTATE_END_OF_LIST() + } +}; + /** * topology_class_init: * @oc: Object class @@ -146,6 +224,7 @@ static void topology_class_init(ObjectClass *oc, void *data) dc->realize = s390_topology_realize; set_bit(DEVICE_CATEGORY_MISC, dc->categories); dc->reset = s390_topology_reset; + dc->vmsd = &vmstate_cpu_topology; } static const TypeInfo cpu_topology_info = { diff --git a/include/hw/s390x/cpu-topology.h b/include/hw/s390x/cpu-topology.h index 4f8ac39ca0..a15567baca 100644 --- a/include/hw/s390x/cpu-topology.h +++ b/include/hw/s390x/cpu-topology.h @@ -29,6 +29,7 @@ typedef struct S390TopoTLE { struct S390Topology { SysBusDevice parent_obj; + bool topology_needed; int total_books; int total_sockets; int drawers; diff --git a/target/s390x/cpu-sysemu.c b/target/s390x/cpu-sysemu.c index 707c0b658c..78cb11c0f8 100644 --- a/target/s390x/cpu-sysemu.c +++ b/target/s390x/cpu-sysemu.c @@ -313,3 +313,11 @@ void s390_cpu_topology_reset(void) kvm_s390_topology_set_mtcr(0); } } + +int s390_cpu_topology_mtcr_set(void) +{ + if (kvm_enabled()) { + return kvm_s390_topology_set_mtcr(1); + } + return -ENOENT; +} diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h index cff5cc0415..0eb2d219d3 100644 --- a/target/s390x/cpu.h +++ b/target/s390x/cpu.h @@ -827,6 +827,7 @@ void s390_do_cpu_set_diag318(CPUState *cs, run_on_cpu_data arg); int s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch_id, int vq, bool assign); void s390_cpu_topology_reset(void); +int s390_cpu_topology_mtcr_set(void); #ifndef CONFIG_USER_ONLY unsigned int s390_cpu_set_state(uint8_t cpu_state, S390CPU *cpu); #else From patchwork Fri Sep 2 07:55:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 12963772 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D2873ECAAA1 for ; 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Fri, 2 Sep 2022 07:55:39 +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 07:55:39 +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 08/10] target/s390x: interception of PTF instruction Date: Fri, 2 Sep 2022 09:55:29 +0200 Message-Id: <20220902075531.188916-9-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-ORIG-GUID: AwOK_-E6ZYY699iF8NzB1o5rCHacDrNK X-Proofpoint-GUID: ztvKFqvUr17_QzhPT6iVmnfrEu_U_YNe 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 clxscore=1015 suspectscore=0 mlxscore=0 malwarescore=0 phishscore=0 priorityscore=1501 mlxlogscore=999 adultscore=0 lowpriorityscore=0 bulkscore=0 impostorscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2209020034 Received-SPF: pass client-ip=148.163.158.5; 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" When the host supports the CPU topology facility, the PTF instruction with function code 2 is interpreted by the SIE, provided that the userland hypervizor activates the interpretation by using the KVM_CAP_S390_CPU_TOPOLOGY KVM extension. The PTF instructions with function code 0 and 1 are intercepted and must be emulated by the userland hypervizor. Signed-off-by: Pierre Morel Reviewed-by: Janis Schoetterl-Glausch --- hw/s390x/cpu-topology.c | 52 ++++++++++++++++++++++++++++++ include/hw/s390x/s390-virtio-ccw.h | 6 ++++ target/s390x/kvm/kvm.c | 13 ++++++++ 3 files changed, 71 insertions(+) diff --git a/hw/s390x/cpu-topology.c b/hw/s390x/cpu-topology.c index b6bf839e40..7dcaa28ca3 100644 --- a/hw/s390x/cpu-topology.c +++ b/hw/s390x/cpu-topology.c @@ -20,6 +20,58 @@ #include "hw/s390x/s390-virtio-ccw.h" #include "hw/s390x/cpu-topology.h" #include "migration/vmstate.h" +#include "target/s390x/cpu.h" +#include "hw/s390x/s390-virtio-ccw.h" + +/* + * s390_handle_ptf: + * + * @register 1: contains the function code + * + * Function codes 0 and 1 handle the CPU polarization. + * We assume an horizontal topology, the only one supported currently + * by Linux, consequently we answer to function code 0, requesting + * horizontal polarization that it is already the current polarization + * and reject vertical polarization request without further explanation. + * + * Function code 2 is handling topology changes and is interpreted + * by the SIE. + */ +void s390_handle_ptf(S390CPU *cpu, uint8_t r1, uintptr_t ra) +{ + CPUS390XState *env = &cpu->env; + uint64_t reg = env->regs[r1]; + uint8_t fc = reg & S390_TOPO_FC_MASK; + + if (!s390_has_feat(S390_FEAT_CONFIGURATION_TOPOLOGY)) { + s390_program_interrupt(env, PGM_OPERATION, ra); + return; + } + + if (env->psw.mask & PSW_MASK_PSTATE) { + s390_program_interrupt(env, PGM_PRIVILEGED, ra); + return; + } + + if (reg & ~S390_TOPO_FC_MASK) { + s390_program_interrupt(env, PGM_SPECIFICATION, ra); + return; + } + + switch (fc) { + case 0: /* Horizontal polarization is already set */ + env->regs[r1] |= S390_PTF_REASON_DONE; + setcc(cpu, 2); + break; + case 1: /* Vertical polarization is not supported */ + env->regs[r1] |= S390_PTF_REASON_NONE; + setcc(cpu, 2); + break; + default: + /* Note that fc == 2 is interpreted by the SIE */ + s390_program_interrupt(env, PGM_SPECIFICATION, ra); + } +} S390Topology *s390_get_topology(void) { diff --git a/include/hw/s390x/s390-virtio-ccw.h b/include/hw/s390x/s390-virtio-ccw.h index 8a0090a071..9e7a0d75bc 100644 --- a/include/hw/s390x/s390-virtio-ccw.h +++ b/include/hw/s390x/s390-virtio-ccw.h @@ -31,6 +31,12 @@ struct S390CcwMachineState { uint8_t loadparm[8]; }; +#define S390_PTF_REASON_NONE (0x00 << 8) +#define S390_PTF_REASON_DONE (0x01 << 8) +#define S390_PTF_REASON_BUSY (0x02 << 8) +#define S390_TOPO_FC_MASK 0xffUL +void s390_handle_ptf(S390CPU *cpu, uint8_t r1, uintptr_t ra); + struct S390CcwMachineClass { /*< private >*/ MachineClass parent_class; diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c index 9c994d27d5..cb14bcc012 100644 --- a/target/s390x/kvm/kvm.c +++ b/target/s390x/kvm/kvm.c @@ -97,6 +97,7 @@ #define PRIV_B9_EQBS 0x9c #define PRIV_B9_CLP 0xa0 +#define PRIV_B9_PTF 0xa2 #define PRIV_B9_PCISTG 0xd0 #define PRIV_B9_PCILG 0xd2 #define PRIV_B9_RPCIT 0xd3 @@ -1463,6 +1464,15 @@ static int kvm_mpcifc_service_call(S390CPU *cpu, struct kvm_run *run) } } +static int kvm_handle_ptf(S390CPU *cpu, struct kvm_run *run) +{ + uint8_t r1 = (run->s390_sieic.ipb >> 20) & 0x0f; + + s390_handle_ptf(cpu, r1, RA_IGNORED); + + return 0; +} + static int handle_b9(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) { int r = 0; @@ -1480,6 +1490,9 @@ static int handle_b9(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1) case PRIV_B9_RPCIT: r = kvm_rpcit_service_call(cpu, run); break; + case PRIV_B9_PTF: + r = kvm_handle_ptf(cpu, run); + break; case PRIV_B9_EQBS: /* just inject exception */ r = -1; From patchwork Fri Sep 2 07:55:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 12963789 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BC271C54EE9 for ; Fri, 2 Sep 2022 08:16:54 +0000 (UTC) Received: from localhost ([::1]:48492 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oU1rB-0000pC-Jm for qemu-devel@archiver.kernel.org; Fri, 02 Sep 2022 04:16:53 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49480) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oU1Ws-0005qz-Gh; 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Fri, 2 Sep 2022 07:55:41 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8712A11C058; Fri, 2 Sep 2022 07:55:41 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id AD5D911C04C; Fri, 2 Sep 2022 07:55:40 +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 07:55:40 +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 09/10] s390x/cpu_topology: activating CPU topology Date: Fri, 2 Sep 2022 09:55:30 +0200 Message-Id: <20220902075531.188916-10-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: ynlcCBh7AFSgXb8LuuqijXm-82dDIZ9V X-Proofpoint-ORIG-GUID: JWn7NTNa1gpzQuIc8QbFcldRzodEwPxX 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 adultscore=0 mlxscore=0 malwarescore=0 phishscore=0 impostorscore=0 priorityscore=1501 suspectscore=0 lowpriorityscore=0 mlxlogscore=999 bulkscore=0 clxscore=1015 spamscore=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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Starting with a new machine, s390-virtio-ccw-7.2, the machine property topology-disable is set to false while it is kept to true for older machine. This allows migrating older machine without disabling the ctop CPU feature for older machine, thus keeping existing start scripts. 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 not disabled. Signed-off-by: Pierre Morel --- hw/core/machine.c | 5 +++ hw/s390x/s390-virtio-ccw.c | 55 ++++++++++++++++++++++++++---- include/hw/boards.h | 3 ++ include/hw/s390x/s390-virtio-ccw.h | 1 + target/s390x/kvm/kvm.c | 14 ++++++++ 5 files changed, 72 insertions(+), 6 deletions(-) diff --git a/hw/core/machine.c b/hw/core/machine.c index 4c5c8d1655..cbcdd40763 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -40,6 +40,11 @@ #include "hw/virtio/virtio-pci.h" #include "qom/object_interfaces.h" +GlobalProperty hw_compat_7_1[] = { + { "s390x-cpu", "ctop", "off"}, +}; +const size_t hw_compat_7_1_len = G_N_ELEMENTS(hw_compat_7_1); + GlobalProperty hw_compat_7_0[] = { { "arm-gicv3-common", "force-8-bit-prio", "on" }, { "nvme-ns", "eui64-default", "on"}, diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index 1fa98740de..3078e68df7 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -249,11 +249,16 @@ static void ccw_init(MachineState *machine) /* init memory + setup max page size. Required for the CPU model */ s390_memory_init(machine->ram); - /* Adding the topology must be done before CPU intialization*/ - dev = qdev_new(TYPE_S390_CPU_TOPOLOGY); - object_property_add_child(qdev_get_machine(), TYPE_S390_CPU_TOPOLOGY, - OBJECT(dev)); - sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); + /* + * Adding the topology must be done before CPU intialization but + * only in the case it is not disabled for migration purpose. + */ + if (!S390_CCW_MACHINE(machine)->topology_disable) { + dev = qdev_new(TYPE_S390_CPU_TOPOLOGY); + object_property_add_child(qdev_get_machine(), TYPE_S390_CPU_TOPOLOGY, + OBJECT(dev)); + sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); + } /* init CPUs (incl. CPU model) early so s390_has_feature() works */ s390_init_cpus(machine); @@ -676,6 +681,21 @@ static inline void machine_set_zpcii_disable(Object *obj, bool value, ms->zpcii_disable = value; } +static inline bool machine_get_topology_disable(Object *obj, Error **errp) +{ + S390CcwMachineState *ms = S390_CCW_MACHINE(obj); + + return ms->topology_disable; +} + +static inline void machine_set_topology_disable(Object *obj, bool value, + Error **errp) +{ + S390CcwMachineState *ms = S390_CCW_MACHINE(obj); + + ms->topology_disable = value; +} + static S390CcwMachineClass *current_mc; /* @@ -778,6 +798,13 @@ static inline void s390_machine_initfn(Object *obj) object_property_set_description(obj, "zpcii-disable", "disable zPCI interpretation facilties"); object_property_set_bool(obj, "zpcii-disable", false, NULL); + + object_property_add_bool(obj, "topology-disable", + machine_get_topology_disable, + machine_set_topology_disable); + object_property_set_description(obj, "topology-disable", + "disable zPCI interpretation facilties"); + object_property_set_bool(obj, "topology-disable", false, NULL); } static const TypeInfo ccw_machine_info = { @@ -830,14 +857,29 @@ bool css_migration_enabled(void) } \ type_init(ccw_machine_register_##suffix) +static void ccw_machine_7_2_instance_options(MachineState *machine) +{ +} + +static void ccw_machine_7_2_class_options(MachineClass *mc) +{ +} +DEFINE_CCW_MACHINE(7_2, "7.2", true); + static void ccw_machine_7_1_instance_options(MachineState *machine) { + S390CcwMachineState *ms = S390_CCW_MACHINE(machine); + + ccw_machine_7_2_instance_options(machine); + ms->topology_disable = true; } static void ccw_machine_7_1_class_options(MachineClass *mc) { + ccw_machine_7_2_class_options(mc); + compat_props_add(mc->compat_props, hw_compat_7_1, hw_compat_7_1_len); } -DEFINE_CCW_MACHINE(7_1, "7.1", true); +DEFINE_CCW_MACHINE(7_1, "7.1", false); static void ccw_machine_7_0_instance_options(MachineState *machine) { @@ -847,6 +889,7 @@ static void ccw_machine_7_0_instance_options(MachineState *machine) ccw_machine_7_1_instance_options(machine); s390_set_qemu_cpu_model(0x8561, 15, 1, qemu_cpu_feat); ms->zpcii_disable = true; + } static void ccw_machine_7_0_class_options(MachineClass *mc) diff --git a/include/hw/boards.h b/include/hw/boards.h index 69e20c1252..6e9803aa2d 100644 --- a/include/hw/boards.h +++ b/include/hw/boards.h @@ -387,6 +387,9 @@ struct MachineState { } \ type_init(machine_initfn##_register_types) +extern GlobalProperty hw_compat_7_1[]; +extern const size_t hw_compat_7_1_len; + extern GlobalProperty hw_compat_7_0[]; extern const size_t hw_compat_7_0_len; diff --git a/include/hw/s390x/s390-virtio-ccw.h b/include/hw/s390x/s390-virtio-ccw.h index 9e7a0d75bc..b14660eecb 100644 --- a/include/hw/s390x/s390-virtio-ccw.h +++ b/include/hw/s390x/s390-virtio-ccw.h @@ -28,6 +28,7 @@ struct S390CcwMachineState { bool dea_key_wrap; bool pv; bool zpcii_disable; + bool topology_disable; uint8_t loadparm[8]; }; diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c index cb14bcc012..6b7efee511 100644 --- a/target/s390x/kvm/kvm.c +++ b/target/s390x/kvm/kvm.c @@ -2385,6 +2385,7 @@ bool kvm_s390_cpu_models_supported(void) void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp) { + S390CcwMachineState *ms = S390_CCW_MACHINE(qdev_get_machine()); struct kvm_s390_vm_cpu_machine prop = {}; struct kvm_device_attr attr = { .group = KVM_S390_VM_CPU_MODEL, @@ -2466,6 +2467,19 @@ void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp) set_bit(S390_FEAT_UNPACK, model->features); } + /* + * If we have the CPU Topology implemented in KVM activate + * the CPU TOPOLOGY feature. + */ + if ((!ms->topology_disable) && + kvm_check_extension(kvm_state, KVM_CAP_S390_CPU_TOPOLOGY)) { + 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); From patchwork Fri Sep 2 07:55:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 12963788 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2FFABC6FA81 for ; 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Fri, 2 Sep 2022 07:55:41 +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 07:55:41 +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 10/10] docs/s390x: document s390x cpu topology Date: Fri, 2 Sep 2022 09:55:31 +0200 Message-Id: <20220902075531.188916-11-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: x2LUgSHHP-1QddOS7LzjJVLZZ2zVUwv7 X-Proofpoint-ORIG-GUID: Ah9qK5dsGwHKrbKCyWIxcKLGrBtAVUsM 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 adultscore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 impostorscore=0 mlxlogscore=999 phishscore=0 suspectscore=0 clxscore=1015 mlxscore=0 spamscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2209020034 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, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Add some basic examples for the definition of cpu topology in s390x. Signed-off-by: Pierre Morel --- docs/system/s390x/cpu_topology.rst | 88 ++++++++++++++++++++++++++++++ 1 file changed, 88 insertions(+) create mode 100644 docs/system/s390x/cpu_topology.rst diff --git a/docs/system/s390x/cpu_topology.rst b/docs/system/s390x/cpu_topology.rst new file mode 100644 index 0000000000..00977d4319 --- /dev/null +++ b/docs/system/s390x/cpu_topology.rst @@ -0,0 +1,88 @@ +CPU Topology on s390x +===================== + +CPU Topology on S390x provides up to 4 levels of topology containers: +drawers, books, sockets and CPUs. +While the three higher level containers, Containers Topology List Entries, +(Containers TLE) define a tree hierarchy, the lowest level of topology +definition, the CPU Topology List Entry (CPU TLE), provides the placement +of the CPUs inside the last container. + +Prerequisites +------------- + +To use CPU Topology a Linux QEMU/KVM machine providing the CPU Topology facility +(STFLE bit 11) is required. + +However, since this facility has been enabled by default in an early version, +the capability ``KVM_CAP_S390_CPU_TOPOLOGY`` is needed to indicate to KVM +that QEMU support CPU Topology. + +Indicating the CPU topology to the Virtual Machine +-------------------------------------------------- + +The CPU Topology, number of drawers, number of books per drawers, number of +sockets per book and number of cores per sockets is specified with the +``-smp`` qemu command arguments. + +Like in : + +.. code-block:: sh + -smp cpus=1,drawers=3,books=4,sockets=2,cores=8,maxcpus=192 + +If drawers or books are not specified, their default to 1. + +New CPUs can be plugged using the device_add hmp command like in: + +.. code-block:: sh + (qemu) device_add host-s390x-cpu,core-id=9 + +The core-id defines the placement of the core in the topology by +starting with core 0 in socket 0, book 0 and drawer 0 up to the maximum +core number of the last socket of the last book in the last drawer. + +In the example above: + +* the core with ID 9 will be placed in container (0,0,1), as core 9 + of CPU TLE 0 of socket 1 in book 0 from drawer 0. +* the core ID 0 is defined by the -smp cpus=1 command and will be + placed as core 0 in CPU TLE 0 of container (0,0,0) + +Note that the core ID is machine wide and the CPU TLE masks provided +by the STSI instruction will be: + +* in socket 0: 0x80000000 (core id 0) +* in socket 1: 0x00400000 (core id 9) + +Indicating the CPU topology to the Guest +---------------------------------------- + +The guest can query for topology changes using the PTF instruction. +In case of a topology change it can request the new topology by issuing +STSI instructions specifying the level of detail required, drawer with +STSI(15.1.4) or books STSI(15.1.3). + +The virtual machine will fill the provided buffer with the count of +drawers (MAG4), books per drawer (MAG3), sockets per book (MAG2) and +cores per socket (MAG1). + +Note that the STSI(15.1.2) is special in two ways: + +* When the firmware detect a change in the values calculated for STSI(15.1.2) + it will trigger the report of the topology change for the PTF instruction. + +Migration +--------- + +For virtio-ccw machines older than s390-virtio-ccw-7.2, CPU Topoogy is +by default disabled. + +CPU Topoogy is by default enabled for s390-virtio-ccw-7.2 and newer machines. + +Enabling the CPU topology on older Machine is done by setting the global +option ''topology-disable'' to false before enabling cpu topology with the +cpu feature "ctop" like in: + +.. code-block:: sh + -machine s390-ccw-virtio-3.0,accel=kvm,topology-disable=false + -cpu z14,ctop=on