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GET /api/patches/1850819/?format=api
{ "id": 1850819, "url": "http://patchwork.ozlabs.org/api/patches/1850819/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20231018130716.286638-7-thuth@redhat.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20231018130716.286638-7-thuth@redhat.com>", "list_archive_url": null, "date": "2023-10-18T13:06:57", "name": "[PULL,06/25] s390x/cpu topology: resetting the Topology-Change-Report", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "f3c631c42c2451be23420d60af14995b7a1c535e", "submitter": { "id": 66152, "url": "http://patchwork.ozlabs.org/api/people/66152/?format=api", "name": "Thomas Huth", "email": "thuth@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20231018130716.286638-7-thuth@redhat.com/mbox/", "series": [ { "id": 378180, "url": "http://patchwork.ozlabs.org/api/series/378180/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=378180", "date": "2023-10-18T13:06:52", "name": "[PULL,01/25] qapi: machine.json: change docs regarding CPU topology", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/378180/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/1850819/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/1850819/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) 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+0000 (UTC)", "from thuth-p1g4.redhat.com (unknown [10.39.192.109])\n by smtp.corp.redhat.com (Postfix) with ESMTP id 8BB4C20268C8;\n Wed, 18 Oct 2023 13:07:27 +0000 (UTC)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1697634451;\n h=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n to:to:cc:cc:mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=yXnLRhYT9uvJpjTT4NJn3SuRdytLVgdnTSs6R2ICfQM=;\n b=HnqGho13pH74dNzC7uEwR4VuCRtLg1MZ+Ijfi0Oc/gNX2WjWS93rwjd9UlKBt7sWFh52RA\n 49slz+lP5niRw79UsFDQZAKYzNmO8ra5EFG5RTe8a8SAnmGQb3HE7pjiABTzqwEYbuJ72a\n l08WEwmTmc92gi+cNmIVZj9pp90W+rw=", "X-MC-Unique": "N4hnUGrxNTeynE5ajvGnzA-1", "From": "Thomas Huth <thuth@redhat.com>", "To": "qemu-devel@nongnu.org", "Cc": "Stefan Hajnoczi <stefanha@redhat.com>, qemu-s390x@nongnu.org,\n Nina Schoetterl-Glausch <nsg@linux.ibm.com>", "Subject": "[PULL 06/25] s390x/cpu topology: resetting the Topology-Change-Report", "Date": "Wed, 18 Oct 2023 15:06:57 +0200", "Message-ID": "<20231018130716.286638-7-thuth@redhat.com>", "In-Reply-To": "<20231018130716.286638-1-thuth@redhat.com>", "References": "<20231018130716.286638-1-thuth@redhat.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Scanned-By": "MIMEDefang 3.4.1 on 10.11.54.4", "Received-SPF": "pass client-ip=170.10.129.124; envelope-from=thuth@redhat.com;\n helo=us-smtp-delivery-124.mimecast.com", "X-Spam_score_int": "-20", "X-Spam_score": "-2.1", "X-Spam_bar": "--", "X-Spam_report": "(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001,\n 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": "<qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "From: Pierre Morel <pmorel@linux.ibm.com>\n\nDuring a subsystem reset the Topology-Change-Report is cleared\nby the machine.\nLet's ask KVM to clear the Modified Topology Change Report (MTCR)\nbit of the SCA in the case of a subsystem reset.\n\nSigned-off-by: Pierre Morel <pmorel@linux.ibm.com>\nReviewed-by: Thomas Huth <thuth@redhat.com>\nReviewed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>\nCo-developed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>\nSigned-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>\nMessage-ID: <20231016183925.2384704-7-nsg@linux.ibm.com>\nSigned-off-by: Thomas Huth <thuth@redhat.com>\n---\n include/hw/s390x/cpu-topology.h | 1 +\n target/s390x/cpu.h | 1 +\n target/s390x/kvm/kvm_s390x.h | 1 +\n hw/s390x/cpu-topology.c | 11 +++++++++++\n hw/s390x/s390-virtio-ccw.c | 3 +++\n target/s390x/cpu-sysemu.c | 13 +++++++++++++\n target/s390x/kvm/kvm.c | 17 +++++++++++++++++\n 7 files changed, 47 insertions(+)", "diff": "diff --git a/include/hw/s390x/cpu-topology.h b/include/hw/s390x/cpu-topology.h\nindex f95d26d37c..e33e7c66df 100644\n--- a/include/hw/s390x/cpu-topology.h\n+++ b/include/hw/s390x/cpu-topology.h\n@@ -56,6 +56,7 @@ static inline void s390_topology_setup_cpu(MachineState *ms,\n #endif\n \n extern S390Topology s390_topology;\n+void s390_topology_reset(void);\n \n static inline int s390_std_socket(int n, CpuTopology *smp)\n {\ndiff --git a/target/s390x/cpu.h b/target/s390x/cpu.h\nindex 09bff39fe4..40c5cedd0e 100644\n--- a/target/s390x/cpu.h\n+++ b/target/s390x/cpu.h\n@@ -654,6 +654,7 @@ typedef struct SysIBCPUListEntry {\n QEMU_BUILD_BUG_ON(sizeof(SysIBCPUListEntry) != 16);\n \n void insert_stsi_15_1_x(S390CPU *cpu, int sel2, uint64_t addr, uint8_t ar, uintptr_t ra);\n+void s390_cpu_topology_set_changed(bool changed);\n \n /* MMU defines */\n #define ASCE_ORIGIN (~0xfffULL) /* segment table origin */\ndiff --git a/target/s390x/kvm/kvm_s390x.h b/target/s390x/kvm/kvm_s390x.h\nindex f9785564d0..649dae5948 100644\n--- a/target/s390x/kvm/kvm_s390x.h\n+++ b/target/s390x/kvm/kvm_s390x.h\n@@ -47,5 +47,6 @@ void kvm_s390_crypto_reset(void);\n void kvm_s390_restart_interrupt(S390CPU *cpu);\n void kvm_s390_stop_interrupt(S390CPU *cpu);\n void kvm_s390_set_diag318(CPUState *cs, uint64_t diag318_info);\n+int kvm_s390_topology_set_mtcr(uint64_t attr);\n \n #endif /* KVM_S390X_H */\ndiff --git a/hw/s390x/cpu-topology.c b/hw/s390x/cpu-topology.c\nindex 13168341b6..7ec9319272 100644\n--- a/hw/s390x/cpu-topology.c\n+++ b/hw/s390x/cpu-topology.c\n@@ -90,6 +90,17 @@ static void s390_topology_init(MachineState *ms)\n smp->books * smp->drawers);\n }\n \n+/**\n+ * s390_topology_reset:\n+ *\n+ * Generic reset for CPU topology, calls s390_topology_reset()\n+ * to reset the kernel Modified Topology Change Record.\n+ */\n+void s390_topology_reset(void)\n+{\n+ s390_cpu_topology_set_changed(false);\n+}\n+\n /**\n * s390_topology_cpu_default:\n * @cpu: pointer to a S390CPU\ndiff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c\nindex 7fe2bce20c..6012165d41 100644\n--- a/hw/s390x/s390-virtio-ccw.c\n+++ b/hw/s390x/s390-virtio-ccw.c\n@@ -124,6 +124,9 @@ static void subsystem_reset(void)\n device_cold_reset(dev);\n }\n }\n+ if (s390_has_topology()) {\n+ s390_topology_reset();\n+ }\n }\n \n static int virtio_ccw_hcall_notify(const uint64_t *args)\ndiff --git a/target/s390x/cpu-sysemu.c b/target/s390x/cpu-sysemu.c\nindex 8112561e5e..1cd30c1d84 100644\n--- a/target/s390x/cpu-sysemu.c\n+++ b/target/s390x/cpu-sysemu.c\n@@ -307,3 +307,16 @@ void s390_do_cpu_set_diag318(CPUState *cs, run_on_cpu_data arg)\n kvm_s390_set_diag318(cs, arg.host_ulong);\n }\n }\n+\n+void s390_cpu_topology_set_changed(bool changed)\n+{\n+ int ret;\n+\n+ if (kvm_enabled()) {\n+ ret = kvm_s390_topology_set_mtcr(changed);\n+ if (ret) {\n+ error_report(\"Failed to set Modified Topology Change Report: %s\",\n+ strerror(-ret));\n+ }\n+ }\n+}\ndiff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c\nindex 53d6300809..d6bda3a2a8 100644\n--- a/target/s390x/kvm/kvm.c\n+++ b/target/s390x/kvm/kvm.c\n@@ -2664,6 +2664,23 @@ int kvm_s390_get_zpci_op(void)\n return cap_zpci_op;\n }\n \n+int kvm_s390_topology_set_mtcr(uint64_t attr)\n+{\n+ struct kvm_device_attr attribute = {\n+ .group = KVM_S390_VM_CPU_TOPOLOGY,\n+ .attr = attr,\n+ };\n+\n+ if (!s390_has_feat(S390_FEAT_CONFIGURATION_TOPOLOGY)) {\n+ return 0;\n+ }\n+ if (!kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_TOPOLOGY, attr)) {\n+ return -ENOTSUP;\n+ }\n+\n+ return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attribute);\n+}\n+\n void kvm_arch_accel_class_init(ObjectClass *oc)\n {\n }\n", "prefixes": [ "PULL", "06/25" ] }