[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v26 12/21] qapi/s390x/cpu topology: CPU_POLARIZATION_CHANGE QAPI
From: |
Nina Schoetterl-Glausch |
Subject: |
[PATCH v26 12/21] qapi/s390x/cpu topology: CPU_POLARIZATION_CHANGE QAPI event |
Date: |
Mon, 16 Oct 2023 20:39:16 +0200 |
From: Pierre Morel <pmorel@linux.ibm.com>
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 <pmorel@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Co-developed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
---
qapi/machine-target.json | 35 +++++++++++++++++++++++++++++++++++
hw/s390x/cpu-topology.c | 2 ++
2 files changed, 37 insertions(+)
diff --git a/qapi/machine-target.json b/qapi/machine-target.json
index 7688f32ffa..ac93a5f82c 100644
--- a/qapi/machine-target.json
+++ b/qapi/machine-target.json
@@ -417,3 +417,38 @@
'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;
--
2.39.2
- [PATCH v26 10/21] machine: adding s390 topology to query-cpu-fast, (continued)
- [PATCH v26 10/21] machine: adding s390 topology to query-cpu-fast, Nina Schoetterl-Glausch, 2023/10/16
- [PATCH v26 20/21] tests/avocado: s390x cpu topology dedicated errors, Nina Schoetterl-Glausch, 2023/10/16
- [PATCH v26 18/21] tests/avocado: s390x cpu topology test dedicated CPU, Nina Schoetterl-Glausch, 2023/10/16
- [PATCH v26 21/21] tests/avocado: s390x cpu topology bad move, Nina Schoetterl-Glausch, 2023/10/16
- [PATCH v26 09/21] qapi/s390x/cpu topology: set-cpu-topology qmp command, Nina Schoetterl-Glausch, 2023/10/16
- [PATCH v26 07/21] s390x/cpu topology: interception of PTF instruction, Nina Schoetterl-Glausch, 2023/10/16
- [PATCH v26 06/21] s390x/cpu topology: resetting the Topology-Change-Report, Nina Schoetterl-Glausch, 2023/10/16
- [PATCH v26 08/21] target/s390x/cpu topology: activate CPU topology, Nina Schoetterl-Glausch, 2023/10/16
- [PATCH v26 14/21] docs/s390x/cpu topology: document s390x cpu topology, Nina Schoetterl-Glausch, 2023/10/16
- [PATCH v26 12/21] qapi/s390x/cpu topology: CPU_POLARIZATION_CHANGE QAPI event,
Nina Schoetterl-Glausch <=
- [PATCH v26 13/21] qapi/s390x/cpu topology: add query-s390x-cpu-polarization command, Nina Schoetterl-Glausch, 2023/10/16
- [PATCH v26 16/21] tests/avocado: s390x cpu topology polarization, Nina Schoetterl-Glausch, 2023/10/16
- [PATCH v26 01/21] qapi: machine.json: change docs regarding CPU topology, Nina Schoetterl-Glausch, 2023/10/16
- [PATCH v26 15/21] tests/avocado: s390x cpu topology core, Nina Schoetterl-Glausch, 2023/10/16
- [PATCH v26 11/21] machine: adding s390 topology to info hotpluggable-cpus, Nina Schoetterl-Glausch, 2023/10/16
- [PATCH v26 04/21] target/s390x/cpu topology: handle STSI(15) and build the SYSIB, Nina Schoetterl-Glausch, 2023/10/16
- [PATCH v26 19/21] tests/avocado: s390x cpu topology test socket full, Nina Schoetterl-Glausch, 2023/10/16