[Qemu-devel] [PATCH v7 12/13] qmp: Add query-ppc-cpu-cores command

[Bharata B Rao <bharata@linux.vnet.ibm.com>]

Show the details of PPC CPU cores via a new QMP command.

TODO: update qmp-commands.hx with example

Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
---
 hw/ppc/cpu-core.c               | 77 +++++++++++++++++++++++++++++++++++++++++
 qapi-schema.json                | 31 +++++++++++++++++
 qmp-commands.hx                 | 51 +++++++++++++++++++++++++++
 stubs/Makefile.objs             |  1 +
 stubs/qmp_query_ppc_cpu_cores.c | 10 ++++++
 5 files changed, 170 insertions(+)
 create mode 100644 stubs/qmp_query_ppc_cpu_cores.c

diff --git a/hw/ppc/cpu-core.c b/hw/ppc/cpu-core.c
index aa96e79..652a5aa 100644
--- a/hw/ppc/cpu-core.c
+++ b/hw/ppc/cpu-core.c
@@ -9,7 +9,84 @@
 #include "hw/ppc/cpu-core.h"
 #include "hw/boards.h"
 #include <sysemu/cpus.h>
+#include <sysemu/kvm.h>
 #include "qemu/error-report.h"
+#include "qmp-commands.h"
+
+/*
+ * QMP: info ppc-cpu-cores
+ */
+static int qmp_ppc_cpu_list(Object *obj, void *opaque)
+{
+    CpuInfoList ***prev = opaque;
+
+    if (object_dynamic_cast(obj, TYPE_POWERPC_CPU)) {
+        CpuInfoList *elem = g_new0(CpuInfoList, 1);
+        CpuInfo *s = g_new0(CpuInfo, 1);
+        CPUState *cs = CPU(obj);
+        PowerPCCPU *cpu = POWERPC_CPU(cs);
+        CPUPPCState *env = &cpu->env;
+
+        cpu_synchronize_state(cs);
+        s->arch = CPU_INFO_ARCH_PPC;
+        s->current = (cs == first_cpu);
+        s->CPU = cs->cpu_index;
+        s->qom_path = object_get_canonical_path(obj);
+        s->halted = cs->halted;
+        s->thread_id = cs->thread_id;
+        s->u.ppc = g_new0(CpuInfoPPC, 1);
+        s->u.ppc->nip = env->nip;
+
+        elem->value = s;
+        elem->next = NULL;
+        **prev = elem;
+        *prev = &elem->next;
+    }
+    object_child_foreach(obj, qmp_ppc_cpu_list, opaque);
+    return 0;
+}
+
+static int qmp_ppc_cpu_core_list(Object *obj, void *opaque)
+{
+    PPCCPUCoreList ***prev = opaque;
+
+    if (object_dynamic_cast(obj, TYPE_POWERPC_CPU_CORE)) {
+        DeviceClass *dc = DEVICE_GET_CLASS(obj);
+        DeviceState *dev = DEVICE(obj);
+
+        if (dev->realized) {
+            PPCCPUCoreList *elem = g_new0(PPCCPUCoreList, 1);
+            PPCCPUCore *s = g_new0(PPCCPUCore, 1);
+            CpuInfoList *cpu_head = NULL;
+            CpuInfoList **cpu_prev = &cpu_head;
+
+            if (dev->id) {
+                s->has_id = true;
+                s->id = g_strdup(dev->id);
+            }
+            s->hotplugged = dev->hotplugged;
+            s->hotpluggable = dc->hotpluggable;
+            qmp_ppc_cpu_list(obj, &cpu_prev);
+            s->threads = cpu_head;
+            elem->value = s;
+            elem->next = NULL;
+            **prev = elem;
+            *prev = &elem->next;
+        }
+    }
+
+    object_child_foreach(obj, qmp_ppc_cpu_core_list, opaque);
+    return 0;
+}
+
+PPCCPUCoreList *qmp_query_ppc_cpu_cores(Error **errp)
+{
+    PPCCPUCoreList *head = NULL;
+    PPCCPUCoreList **prev = &head;
+
+    qmp_ppc_cpu_core_list(qdev_get_machine(), &prev);
+    return head;
+}
 
 static int ppc_cpu_core_realize_child(Object *child, void *opaque)
 {
diff --git a/qapi-schema.json b/qapi-schema.json
index 8d04897..0902697 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -4083,3 +4083,34 @@
 ##
 { 'enum': 'ReplayMode',
   'data': [ 'none', 'record', 'play' ] }
+
+##
+# @PPCCPUCore:
+#
+# Information about PPC CPU core devices
+#
+# @hotplugged: true if device was hotplugged
+#
+# @hotpluggable: true if device if could be added/removed while machine is running
+#
+# Since: 2.6
+##
+
+{ 'struct': 'PPCCPUCore',
+  'data': { '*id': 'str',
+            'hotplugged': 'bool',
+            'hotpluggable': 'bool',
+            'threads' : ['CpuInfo']
+          }
+}
+
+##
+# @query-ppc-cpu-core:
+#
+# Returns information for all PPC CPU core devices
+#
+# Returns: a list of @PPCCPUCore.
+#
+# Since: 2.6
+##
+{ 'command': 'query-ppc-cpu-cores', 'returns': ['PPCCPUCore'] }
diff --git a/qmp-commands.hx b/qmp-commands.hx
index db072a6..77cda3c 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -4795,3 +4795,54 @@ Example:
                  {"type": 0, "out-pport": 0, "pport": 0, "vlan-id": 3840,
                   "pop-vlan": 1, "id": 251658240}
    ]}
+
+EQMP
+
+#if defined TARGET_PPC64
+    {
+        .name       = "query-ppc-cpu-cores",
+        .args_type  = "",
+        .mhandler.cmd_new = qmp_marshal_query_ppc_cpu_cores,
+    },
+#endif
+
+SQMP
+@query-ppc-cpu-cores
+--------------------
+
+Show PowerPC CPU core devices information.
+
+Example:
+-> { "execute": "query-ppc-cpu-cores" }
+<- {"return": [{"threads": [
+                 {"arch": "ppc",
+                  "current": false,
+                  "CPU": 16,
+                  "nip": -4611686018426944644,
+                  "qom_path": "/machine/peripheral/core2/thread[0]",
+                  "halted": false,
+                  "thread_id": 32636},
+                 {"arch": "ppc",
+                  "current": false",
+                  "CPU": 17,
+                  "nip": -4611686018426944644,
+                  "qom_path": "/machine/peripheral/core2/thread[1]",
+                  "halted": false, "thread_id": 32637},
+                 {"arch": "ppc",
+                  "current": false,
+                  "CPU": 18,
+                  "nip": -4611686018426944644,
+                  "qom_path": "/machine/peripheral/core2/thread[2]",
+                  "halted": false,
+                  "thread_id": 32638},
+                 {"arch": "ppc",
+                  "current": false,
+                  "CPU": 19,
+                  "nip": -4611686018426944644,
+                  "qom_path": "/machine/peripheral/core2/thread[3]",
+                  "halted": false,
+                  "thread_id": 32639}],
+                "hotplugged": false,
+                "hotpluggable": true,
+                "id": "core2"}
+              ]}
diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
index d7898a0..1d65999 100644
--- a/stubs/Makefile.objs
+++ b/stubs/Makefile.objs
@@ -38,3 +38,4 @@ stub-obj-y += qmp_pc_dimm_device_list.o
 stub-obj-y += target-monitor-defs.o
 stub-obj-y += target-get-monitor-def.o
 stub-obj-y += vhost.o
+stub-obj-y += qmp_query_ppc_cpu_cores.o
diff --git a/stubs/qmp_query_ppc_cpu_cores.c b/stubs/qmp_query_ppc_cpu_cores.c
new file mode 100644
index 0000000..6a875f0
--- /dev/null
+++ b/stubs/qmp_query_ppc_cpu_cores.c
@@ -0,0 +1,10 @@
+#include "qom/object.h"
+#include "qapi/qmp/qerror.h"
+#include "qemu/typedefs.h"
+#include "qmp-commands.h"
+
+PPCCPUCoreList *qmp_query_ppc_cpu_cores(Error **errp)
+{
+    error_setg(errp, QERR_UNSUPPORTED);
+    return 0;
+}
-- 
2.1.0