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Fri, 8 May 2020 23:08:43 +0000 (GMT) Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0DCEAAC05E; Fri, 8 May 2020 23:08:43 +0000 (GMT) Received: from localhost.localdomain.com (unknown [9.85.189.36]) by b01ledav006.gho.pok.ibm.com (Postfix) with ESMTP; Fri, 8 May 2020 23:08:42 +0000 (GMT) From: Collin Walling To: qemu-devel@nongnu.org, qemu-s390x@nongnu.org Subject: [PATCH v1 0/8] s390: Extended-Length SCCB & DIAGNOSE 0x318 Date: Fri, 8 May 2020 19:08:15 -0400 Message-Id: <20200508230823.22956-1-walling@linux.ibm.com> X-Mailer: git-send-email 2.21.1 MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216, 18.0.676 definitions=2020-05-08_19:2020-05-08, 2020-05-08 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 mlxscore=0 impostorscore=0 malwarescore=0 spamscore=0 mlxlogscore=723 suspectscore=0 phishscore=0 clxscore=1011 priorityscore=1501 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2005080190 Received-SPF: pass client-ip=148.163.158.5; envelope-from=walling@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/08 19:08:45 X-ACL-Warn: Detected OS = Linux 3.x [generic] X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, KHOP_DYNAMIC=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: frankja@linux.ibm.com, david@redhat.com, cohuck@redhat.com, pasic@linux.ibm.com, borntraeger@de.ibm.com, mst@redhat.com, svens@linux.ibm.com, pbonzini@redhat.com, mihajlov@linux.ibm.com, rth@twiddle.net Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" This patch series introduces two features for an s390 KVM quest: - Extended-Length SCCB (els) for the Read SCP/CPU Info SCLP commands - DIAGNOSE 0x318 (diag318) enabling / migration handling The diag318 feature depends on els and KVM support. The els feature is handled entirely with QEMU, and does not require KVM support. These patches are introduced together for two main reasons: - els allows diag318 to exist while retaining the original 248 VCPU max - diag318 is presented to show how els is useful Full els support is dependant on the Linux kernel, which must react to the SCLP response code and set an appropriate-length SCCB. A user should take care when tuning the CPU model for a VM. If a user defines a VM with els support and specifies 248 CPUs, but the guest Linux kernel cannot react to the SCLP response code, then the guest will crash immediately upon kernel startup. Since it has been some time since the last review and a few things have changed, I've removed all ack's and set this submission to v1. Collin L. Walling (8): s390/sclp: remove SCLPDevice param from prepare_cpu_entries s390/sclp: check sccb len before filling in data s390/sclp: rework sclp boundary and length checks s390/sclp: read sccb from mem based on sccb length s390/sclp: use cpu offset to locate cpu entries s390/sclp: add extended-length sccb support for kvm guest s390/kvm: header sync for diag318 s390: diagnose 318 info reset and migration support hw/s390x/s390-virtio-ccw.c | 45 +++++++++++++ hw/s390x/sclp.c | 101 +++++++++++++++++++++------- include/hw/s390x/s390-virtio-ccw.h | 1 + include/hw/s390x/sclp.h | 4 ++ linux-headers/asm-s390/kvm.h | 5 ++ smp.max_cpus | 0 target/s390x/cpu.c | 19 ++++++ target/s390x/cpu.h | 4 ++ target/s390x/cpu_features.h | 1 + target/s390x/cpu_features_def.inc.h | 4 ++ target/s390x/cpu_models.c | 1 + target/s390x/gen-features.c | 2 + target/s390x/kvm-stub.c | 10 +++ target/s390x/kvm.c | 52 ++++++++++++++ target/s390x/kvm_s390x.h | 3 + 15 files changed, 229 insertions(+), 23 deletions(-) create mode 100644 smp.max_cpus