[PATCH v20 12/21] qapi/s390x/cpu topology: query-cpu-polarization qmp command

[Pierre Morel <pmorel@xxxxxxxxxxxxx>]

The query-cpu-polarization qmp command returns the current
CPU polarization of the machine.

Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
---
 qapi/machine-target.json | 30 ++++++++++++++++++++++++++++++
 hw/s390x/cpu-topology.c  | 14 ++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/qapi/machine-target.json b/qapi/machine-target.json
index ffde2e9cbd..8eb05755cd 100644
--- a/qapi/machine-target.json
+++ b/qapi/machine-target.json
@@ -4,6 +4,7 @@
 # This work is licensed under the terms of the GNU GPL, version 2 or later.
 # See the COPYING file in the top-level directory.
 
+{ 'include': 'common.json' }
 { 'include': 'machine-common.json' }
 
 ##
@@ -424,3 +425,32 @@
   'features': [ 'unstable' ],
   'if': { 'all': [ 'TARGET_S390X', 'CONFIG_KVM' ] }
 }
+
+##
+# @CpuPolarizationInfo:
+#
+# The result of a cpu polarization
+#
+# @polarization: the CPU polarization
+#
+# Since: 2.8
+##
+{ 'struct': 'CpuPolarizationInfo',
+  'data': { 'polarization': 'CpuS390Polarization' },
+  'if': { 'all': [ 'TARGET_S390X', 'CONFIG_KVM' ] }
+}
+
+##
+# @query-cpu-polarization:
+#
+# Features:
+# @unstable: This command may still be modified.
+#
+# Returns: the machine polarization
+#
+# Since: 8.1
+##
+{ 'command': 'query-cpu-polarization', 'returns': 'CpuPolarizationInfo',
+  'features': [ 'unstable' ],
+  'if': { 'all': [ 'TARGET_S390X', 'CONFIG_KVM' ] }
+}
diff --git a/hw/s390x/cpu-topology.c b/hw/s390x/cpu-topology.c
index e8b140d623..d440e8a3c6 100644
--- a/hw/s390x/cpu-topology.c
+++ b/hw/s390x/cpu-topology.c
@@ -18,6 +18,7 @@
 #include "hw/s390x/cpu-topology.h"
 #include "qapi/qapi-commands-machine-target.h"
 #include "qapi/qapi-events-machine-target.h"
+#include "qapi/type-helpers.h"
 
 /*
  * s390_topology is used to keep the topology information.
@@ -468,3 +469,16 @@ void qmp_set_cpu_topology(uint16_t core,
                          has_drawer, drawer, has_entitlement, entitlement,
                          has_dedicated, dedicated, errp);
 }
+
+CpuPolarizationInfo *qmp_query_cpu_polarization(Error **errp)
+{
+    CpuPolarizationInfo *info = g_new0(CpuPolarizationInfo, 1);
+
+    if (s390_topology.vertical_polarization) {
+        info->polarization = S390_CPU_POLARIZATION_VERTICAL;
+    } else {
+        info->polarization = S390_CPU_POLARIZATION_HORIZONTAL;
+    }
+
+    return info;
+}
-- 
2.31.1