[Qemu-devel] [RFC PATCH v0 3/8] cpu: CPU package abstract device

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

A minimal abstract device that target machines can create sub-types of
to define their own cpu-package devices. Provides a realize routine that
walks the child objects and realizes them iteratively. Hence cpu-package
interface expects the target implementations to have a hierarchical
setup for their CPU objects.

Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
---
 hw/cpu/Makefile.objs     |  1 +
 hw/cpu/package.c         | 66 ++++++++++++++++++++++++++++++++++++++++++++++++
 include/hw/cpu/package.h | 27 ++++++++++++++++++++
 3 files changed, 94 insertions(+)
 create mode 100644 hw/cpu/package.c
 create mode 100644 include/hw/cpu/package.h

diff --git a/hw/cpu/Makefile.objs b/hw/cpu/Makefile.objs
index 0954a18..f540826 100644
--- a/hw/cpu/Makefile.objs
+++ b/hw/cpu/Makefile.objs
@@ -2,4 +2,5 @@ obj-$(CONFIG_ARM11MPCORE) += arm11mpcore.o
 obj-$(CONFIG_REALVIEW) += realview_mpcore.o
 obj-$(CONFIG_A9MPCORE) += a9mpcore.o
 obj-$(CONFIG_A15MPCORE) += a15mpcore.o
+obj-y += package.o
 
diff --git a/hw/cpu/package.c b/hw/cpu/package.c
new file mode 100644
index 0000000..259dbfa
--- /dev/null
+++ b/hw/cpu/package.c
@@ -0,0 +1,66 @@
+/*
+ * CPU package device
+ *
+ * Copyright (C) 2016 Bharata B Rao <bharata@linux.vnet.ibm.com>
+ *
+ * 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 "hw/cpu/package.h"
+#include "qom/object_interfaces.h"
+
+Object *cpu_package_create_object(const char *typename, uint32_t index,
+                                  Error **errp)
+{
+    char *id;
+    Object *obj;
+
+    id = g_strdup_printf("" TYPE_CPU_PACKAGE "[%"PRIu32"]", index);
+    obj = object_new(typename);
+    object_property_add_child(qdev_get_machine(), id, obj, errp);
+    g_free(id);
+
+    if (*errp) {
+        return NULL;
+    } else {
+        return obj;
+    }
+}
+
+static int cpu_package_realize_child(Object *child, void *opaque)
+{
+    Error **errp = opaque;
+
+    object_property_set_bool(child, true, "realized", errp);
+    if (*errp) {
+        return 1;
+    }
+    return 0;
+}
+
+static void cpu_package_realize(DeviceState *dev, Error **errp)
+{
+    object_child_foreach(OBJECT(dev), cpu_package_realize_child, errp);
+}
+
+static void cpu_package_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+
+    dc->realize = cpu_package_realize;
+}
+
+static const TypeInfo cpu_package_info = {
+    .name = TYPE_CPU_PACKAGE,
+    .parent = TYPE_DEVICE,
+    .abstract = true,
+    .instance_size = sizeof(CPUPackage),
+    .class_init = cpu_package_class_init,
+};
+
+static void cpu_package_register_types(void)
+{
+    type_register_static(&cpu_package_info);
+}
+
+type_init(cpu_package_register_types)
diff --git a/include/hw/cpu/package.h b/include/hw/cpu/package.h
new file mode 100644
index 0000000..0579a42
--- /dev/null
+++ b/include/hw/cpu/package.h
@@ -0,0 +1,27 @@
+/*
+ * CPU package device
+ *
+ * Copyright (C) 2016 Bharata B Rao <bharata@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+#ifndef HW_CPU_PACKAGE_H
+#define HW_CPU_PACKAGE_H
+
+#include "hw/qdev.h"
+
+#define TYPE_CPU_PACKAGE "cpu-package"
+#define CPU_PACKAGE(obj) \
+    OBJECT_CHECK(CPUPackage, (obj), TYPE_CPU_PACKAGE)
+
+typedef struct CPUPackage {
+    /* private */
+    DeviceState parent_obj;
+
+    /* public */
+} CPUPackage;
+
+Object *cpu_package_create_object(const char *typename, uint32_t index,
+                                  Error **errp);
+#endif
-- 
2.1.0