[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v20 11/21] qapi/s390x/cpu topology: CPU_POLARIZATION_CHANGE qapi
From: |
Pierre Morel |
Subject: |
[PATCH v20 11/21] qapi/s390x/cpu topology: CPU_POLARIZATION_CHANGE qapi event |
Date: |
Tue, 25 Apr 2023 18:14:46 +0200 |
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>
---
qapi/machine-target.json | 33 +++++++++++++++++++++++++++++++++
hw/s390x/cpu-topology.c | 2 ++
2 files changed, 35 insertions(+)
diff --git a/qapi/machine-target.json b/qapi/machine-target.json
index 3b7a0b77f4..ffde2e9cbd 100644
--- a/qapi/machine-target.json
+++ b/qapi/machine-target.json
@@ -391,3 +391,36 @@
'features': [ 'unstable' ],
'if': { 'all': [ 'TARGET_S390X' , 'CONFIG_KVM' ] }
}
+
+##
+# @CPU_POLARIZATION_CHANGE:
+#
+# Emitted when the guest asks to change the polarization.
+#
+# @polarization: polarization specified by the guest
+#
+# Features:
+# @unstable: This command may still be modified.
+#
+# 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.
+#
+# Since: 8.1
+#
+# Example:
+#
+# <- { "event": "CPU_POLARIZATION_CHANGE",
+# "data": { "polarization": 0 },
+# "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 e5fb976594..e8b140d623 100644
--- a/hw/s390x/cpu-topology.c
+++ b/hw/s390x/cpu-topology.c
@@ -17,6 +17,7 @@
#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.
@@ -138,6 +139,7 @@ void s390_handle_ptf(S390CPU *cpu, uint8_t r1, uintptr_t ra)
} else {
s390_topology.vertical_polarization = !!fc;
s390_cpu_topology_set_changed(true);
+ qapi_event_send_cpu_polarization_change(fc);
setcc(cpu, 0);
}
break;
--
2.31.1
- [PATCH v20 20/21] tests/avocado: s390x cpu topology bad move, (continued)
- [PATCH v20 20/21] tests/avocado: s390x cpu topology bad move, Pierre Morel, 2023/04/25
- [PATCH v20 03/21] target/s390x/cpu topology: handle STSI(15) and build the SYSIB, Pierre Morel, 2023/04/25
- [PATCH v20 05/21] s390x/cpu topology: resetting the Topology-Change-Report, Pierre Morel, 2023/04/25
- [PATCH v20 09/21] machine: adding s390 topology to query-cpu-fast, Pierre Morel, 2023/04/25
- [PATCH v20 21/21] tests/avocado: s390x cpu topology query-cpu-polarization, Pierre Morel, 2023/04/25
- [PATCH v20 13/21] docs/s390x/cpu topology: document s390x cpu topology, Pierre Morel, 2023/04/25
- [PATCH v20 19/21] tests/avocado: s390x cpu topology dedicated errors, Pierre Morel, 2023/04/25
- [PATCH v20 17/21] tests/avocado: s390x cpu topology test dedicated CPU, Pierre Morel, 2023/04/25
- [PATCH v20 10/21] machine: adding s390 topology to info hotpluggable-cpus, Pierre Morel, 2023/04/25
- [PATCH v20 16/21] tests/avocado: s390x cpu topology entitlement tests, Pierre Morel, 2023/04/25
- [PATCH v20 11/21] qapi/s390x/cpu topology: CPU_POLARIZATION_CHANGE qapi event,
Pierre Morel <=
- [PATCH v20 18/21] tests/avocado: s390x cpu topology test socket full, Pierre Morel, 2023/04/25
- [PATCH v20 04/21] s390x/sclp: reporting the maximum nested topology entries, Pierre Morel, 2023/04/25
- [PATCH v20 15/21] tests/avocado: s390x cpu topology polarisation, Pierre Morel, 2023/04/25
- [PATCH v20 14/21] tests/avocado: s390x cpu topology core, Pierre Morel, 2023/04/25
- [PATCH v20 08/21] qapi/s390x/cpu topology: set-cpu-topology qmp command, Pierre Morel, 2023/04/25