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Thu, 5 Oct 2023 16:02:00 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5DA0A2004F; Thu, 5 Oct 2023 16:02:00 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 5 Oct 2023 16:02:00 +0000 (GMT) From: Nina Schoetterl-Glausch To: qemu-devel@nongnu.org, qemu-s390x@nongnu.org, Eduardo Habkost , Marcel Apfelbaum , Paolo Bonzini , Richard Henderson , David Hildenbrand , Halil Pasic , Christian Borntraeger , Eric Farman , Thomas Huth , Eric Blake , Markus Armbruster , Michael Roth , Nina Schoetterl-Glausch Cc: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Yanan Wang , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Ilya Leoshkevich , Cleber Rosa , Wainer dos Santos Moschetta , Beraldo Leal , Pierre Morel Subject: [PATCH v25 12/21] qapi/s390x/cpu topology: CPU_POLARIZATION_CHANGE qapi event Date: Thu, 5 Oct 2023 18:01:46 +0200 Message-Id: <20231005160155.1945588-13-nsg@linux.ibm.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231005160155.1945588-1-nsg@linux.ibm.com> References: <20231005160155.1945588-1-nsg@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: DjBBnNNQO4ldvEX4dJP5AyY7qcajTXKO X-Proofpoint-GUID: K05uPs-xEZwO-4-2dmWo9xp9zy1IFPNF X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-05_10,2023-10-05_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 adultscore=0 mlxlogscore=999 mlxscore=0 bulkscore=0 clxscore=1011 impostorscore=0 suspectscore=0 spamscore=0 phishscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2309180000 definitions=main-2310050124 Received-SPF: pass client-ip=148.163.158.5; envelope-from=nsg@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_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Pierre Morel When the guest asks to change the polarization this change is forwarded to the upper layer using QAPI. The upper layer is supposed to take according decisions concerning CPU provisioning. Signed-off-by: Pierre Morel Reviewed-by: Thomas Huth Reviewed-by: Nina Schoetterl-Glausch Co-developed-by: Nina Schoetterl-Glausch Signed-off-by: Nina Schoetterl-Glausch Acked-by: Markus Armbruster --- qapi/machine-target.json | 34 ++++++++++++++++++++++++++++++++++ hw/s390x/cpu-topology.c | 2 ++ 2 files changed, 36 insertions(+) diff --git a/qapi/machine-target.json b/qapi/machine-target.json index 3fd8390922..02f1de5d02 100644 --- a/qapi/machine-target.json +++ b/qapi/machine-target.json @@ -417,3 +417,37 @@ 'features': [ 'unstable' ], 'if': { 'all': [ 'TARGET_S390X' , 'CONFIG_KVM' ] } } + +## +# @CPU_POLARIZATION_CHANGE: +# +# Emitted when the guest asks to change the polarization. +# +# The guest can tell the host (via the PTF instruction) whether the +# CPUs should be provisioned using horizontal or vertical polarization. +# +# On horizontal polarization the host is expected to provision all vCPUs +# equally. +# On vertical polarization the host can provision each vCPU differently. +# The guest will get information on the details of the provisioning +# the next time it uses the STSI(15) instruction. +# +# @polarization: polarization specified by the guest +# +# Features: +# +# @unstable: This event is experimental. +# +# Since: 8.2 +# +# Example: +# +# <- { "event": "CPU_POLARIZATION_CHANGE", +# "data": { "polarization": "horizontal" }, +# "timestamp": { "seconds": 1401385907, "microseconds": 422329 } } +## +{ 'event': 'CPU_POLARIZATION_CHANGE', + 'data': { 'polarization': 'CpuS390Polarization' }, + 'features': [ 'unstable' ], + 'if': { 'all': [ 'TARGET_S390X', 'CONFIG_KVM' ] } +} diff --git a/hw/s390x/cpu-topology.c b/hw/s390x/cpu-topology.c index f3771f5045..327bccea4f 100644 --- a/hw/s390x/cpu-topology.c +++ b/hw/s390x/cpu-topology.c @@ -24,6 +24,7 @@ #include "hw/s390x/s390-virtio-ccw.h" #include "hw/s390x/cpu-topology.h" #include "qapi/qapi-commands-machine-target.h" +#include "qapi/qapi-events-machine-target.h" /* * s390_topology is used to keep the topology information. @@ -136,6 +137,7 @@ void s390_handle_ptf(S390CPU *cpu, uint8_t r1, uintptr_t ra) } else { s390_topology.polarization = polarization; s390_cpu_topology_set_changed(true); + qapi_event_send_cpu_polarization_change(polarization); setcc(cpu, 0); } break;