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[PULL 12/25] qapi/s390x/cpu topology: CPU_POLARIZATION_CHANGE QAPI event
From: |
Thomas Huth |
Subject: |
[PULL 12/25] qapi/s390x/cpu topology: CPU_POLARIZATION_CHANGE QAPI event |
Date: |
Wed, 18 Oct 2023 15:07:03 +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>
Message-ID: <20231016183925.2384704-13-nsg@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.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;
--
2.41.0
- Re: [PULL 06/25] s390x/cpu topology: resetting the Topology-Change-Report, (continued)
[PULL 08/25] target/s390x/cpu topology: activate CPU topology, Thomas Huth, 2023/10/18
[PULL 02/25] CPU topology: extend with s390 specifics, Thomas Huth, 2023/10/18
[PULL 04/25] target/s390x/cpu topology: handle STSI(15) and build the SYSIB, Thomas Huth, 2023/10/18
[PULL 10/25] machine: adding s390 topology to query-cpu-fast, Thomas Huth, 2023/10/18
[PULL 11/25] machine: adding s390 topology to info hotpluggable-cpus, Thomas Huth, 2023/10/18
[PULL 09/25] qapi/s390x/cpu topology: set-cpu-topology qmp command, Thomas Huth, 2023/10/18
[PULL 12/25] qapi/s390x/cpu topology: CPU_POLARIZATION_CHANGE QAPI event,
Thomas Huth <=
[PULL 17/25] tests/avocado: s390x cpu topology entitlement tests, Thomas Huth, 2023/10/18
[PULL 13/25] qapi/s390x/cpu topology: add query-s390x-cpu-polarization command, Thomas Huth, 2023/10/18
[PULL 21/25] tests/avocado: s390x cpu topology bad move, Thomas Huth, 2023/10/18
[PULL 24/25] target/s390x/kvm: Simplify the GPRs, ACRs, CRs and prefix synchronization code, Thomas Huth, 2023/10/18
[PULL 22/25] hw/s390x: Clean up global variable shadowing in quiesce_powerdown_req(), Thomas Huth, 2023/10/18
[PULL 15/25] tests/avocado: s390x cpu topology core, Thomas Huth, 2023/10/18
[PULL 14/25] docs/s390x/cpu topology: document s390x cpu topology, Thomas Huth, 2023/10/18
[PULL 18/25] tests/avocado: s390x cpu topology test dedicated CPU, Thomas Huth, 2023/10/18
[PULL 19/25] tests/avocado: s390x cpu topology test socket full, Thomas Huth, 2023/10/18
[PULL 20/25] tests/avocado: s390x cpu topology dedicated errors, Thomas Huth, 2023/10/18