[Qemu-arm] [PATCH v2 04/11] hw/arm/virt: Add virtual ACPI device

[Shameer Kolothum]

From: Samuel Ortiz <address@hidden>

This is to provide an acpi device interface for Arm/virt.
This will be used by Arm/Virt to add hotplug support via
ACPI GED device.

Signed-off-by: Samuel Ortiz <address@hidden>
Signed-off-by: Shameer Kolothum <address@hidden>
---
 hw/arm/Makefile.objs  |   2 +-
 hw/arm/virt-acpi.c    | 111 ++++++++++++++++++++++++++++++++++++++++++++++++++
 include/hw/arm/virt.h |   1 +
 3 files changed, 113 insertions(+), 1 deletion(-)
 create mode 100644 hw/arm/virt-acpi.c

diff --git a/hw/arm/Makefile.objs b/hw/arm/Makefile.objs
index fa57c7c..e0db3cd 100644
--- a/hw/arm/Makefile.objs
+++ b/hw/arm/Makefile.objs
@@ -1,6 +1,6 @@
 obj-y += boot.o sysbus-fdt.o
 obj-$(CONFIG_ARM_VIRT) += virt.o
-obj-$(CONFIG_ACPI) += virt-acpi-build.o
+obj-$(CONFIG_ACPI) += virt-acpi-build.o virt-acpi.o
 obj-$(CONFIG_DIGIC) += digic_boards.o
 obj-$(CONFIG_EXYNOS4) += exynos4_boards.o
 obj-$(CONFIG_HIGHBANK) += highbank.o
diff --git a/hw/arm/virt-acpi.c b/hw/arm/virt-acpi.c
new file mode 100644
index 0000000..df8a02b
--- /dev/null
+++ b/hw/arm/virt-acpi.c
@@ -0,0 +1,111 @@
+/*
+ *
+ * Copyright (c) 2018 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/range.h"
+#include "qapi/error.h"
+#include "exec/address-spaces.h"
+
+#include "hw/hw.h"
+#include "hw/hotplug.h"
+#include "hw/sysbus.h"
+#include "hw/arm/virt.h"
+
+#include "hw/acpi/acpi.h"
+
+typedef struct VirtAcpiState {
+    SysBusDevice parent_obj;
+} VirtAcpiState;
+
+#define TYPE_VIRT_ACPI "virt-acpi"
+#define VIRT_ACPI(obj) \
+    OBJECT_CHECK(VirtAcpiState, (obj), TYPE_VIRT_ACPI)
+
+static const VMStateDescription vmstate_acpi = {
+    .name = "virt_acpi",
+    .version_id = 1,
+    .minimum_version_id = 1,
+};
+
+static void virt_device_plug_cb(HotplugHandler *hotplug_dev,
+                                DeviceState *dev, Error **errp)
+{
+}
+
+static void virt_device_unplug_request_cb(HotplugHandler *hotplug_dev,
+                                          DeviceState *dev, Error **errp)
+{
+}
+
+static void virt_device_unplug_cb(HotplugHandler *hotplug_dev,
+                                  DeviceState *dev, Error **errp)
+{
+}
+
+static void virt_send_ged(AcpiDeviceIf *adev, AcpiEventStatusBits ev)
+{
+}
+
+static void virt_device_realize(DeviceState *dev, Error **errp)
+{
+}
+
+DeviceState *virt_acpi_init(void)
+{
+    return sysbus_create_simple(TYPE_VIRT_ACPI, -1, NULL);
+}
+
+static Property virt_acpi_properties[] = {
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virt_acpi_class_init(ObjectClass *class, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(class);
+    HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(class);
+    AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_CLASS(class);
+
+    dc->desc = "ACPI";
+    dc->vmsd = &vmstate_acpi;
+    dc->props = virt_acpi_properties;
+    dc->realize = virt_device_realize;
+
+    hc->plug = virt_device_plug_cb;
+    hc->unplug_request = virt_device_unplug_request_cb;
+    hc->unplug = virt_device_unplug_cb;
+
+    adevc->send_event = virt_send_ged;
+}
+
+static const TypeInfo virt_acpi_info = {
+    .name          = TYPE_VIRT_ACPI,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(VirtAcpiState),
+    .class_init    = virt_acpi_class_init,
+    .interfaces = (InterfaceInfo[]) {
+        { TYPE_HOTPLUG_HANDLER },
+        { TYPE_ACPI_DEVICE_IF },
+        { }
+    }
+};
+
+static void virt_acpi_register_types(void)
+{
+    type_register_static(&virt_acpi_info);
+}
+
+type_init(virt_acpi_register_types)
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index 507517c..6076167 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -145,6 +145,7 @@ typedef struct {
     OBJECT_CLASS_CHECK(VirtMachineClass, klass, TYPE_VIRT_MACHINE)
 
 void virt_acpi_setup(VirtMachineState *vms);
+DeviceState *virt_acpi_init(void);
 
 /* Return the number of used redistributor regions  */
 static inline int virt_gicv3_redist_region_count(VirtMachineState *vms)
-- 
2.7.4