[qemu-s390x] [PATCH v10 4/6] s390x/ap: base Adjunct Processor (AP) object model

[Tony Krowiak]

From: Tony Krowiak <address@hidden>

Introduces the base object model for virtualizing AP devices.

Signed-off-by: Tony Krowiak <address@hidden>
Tested-by: Pierre Morel<address@hidden>
Acked-by: David Hildenbrand <address@hidden>
---
 MAINTAINERS                  | 12 ++++++
 hw/s390x/Makefile.objs       |  2 +
 hw/s390x/ap-bridge.c         | 78 ++++++++++++++++++++++++++++++++++++
 hw/s390x/ap-device.c         | 39 ++++++++++++++++++
 hw/s390x/s390-virtio-ccw.c   |  4 ++
 include/hw/s390x/ap-bridge.h | 19 +++++++++
 include/hw/s390x/ap-device.h | 23 +++++++++++
 7 files changed, 177 insertions(+)
 create mode 100644 hw/s390x/ap-bridge.c
 create mode 100644 hw/s390x/ap-device.c
 create mode 100644 include/hw/s390x/ap-bridge.h
 create mode 100644 include/hw/s390x/ap-device.h

diff --git a/MAINTAINERS b/MAINTAINERS
index d12518c08f10..97e8ed808bc0 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1199,6 +1199,18 @@ F: include/hw/s390x/s390-ccw.h
 T: git git://github.com/cohuck/qemu.git s390-next
 L: address@hidden
 
+vfio-ap
+M: Christian Borntraeger <address@hidden>
+M: Tony Krowiak <address@hidden>
+M: Halil Pasic <address@hidden>
+M: Pierre Morel <address@hidden>
+S: Supported
+F: hw/s390x/ap-device.c
+F: hw/s390x/ap-bridge.c
+F: include/hw/s390x/ap-device.h
+F: include/hw/s390x/ap-bridge.h
+L: address@hidden
+
 vhost
 M: Michael S. Tsirkin <address@hidden>
 S: Supported
diff --git a/hw/s390x/Makefile.objs b/hw/s390x/Makefile.objs
index 93282f7c593c..add89b150d90 100644
--- a/hw/s390x/Makefile.objs
+++ b/hw/s390x/Makefile.objs
@@ -20,3 +20,5 @@ obj-$(CONFIG_TCG) += tod-qemu.o
 obj-$(CONFIG_KVM) += s390-skeys-kvm.o
 obj-$(CONFIG_KVM) += s390-stattrib-kvm.o
 obj-y += s390-ccw.o
+obj-y += ap-device.o
+obj-y += ap-bridge.o
diff --git a/hw/s390x/ap-bridge.c b/hw/s390x/ap-bridge.c
new file mode 100644
index 000000000000..3795d30dd7c9
--- /dev/null
+++ b/hw/s390x/ap-bridge.c
@@ -0,0 +1,78 @@
+/*
+ * ap bridge
+ *
+ * Copyright 2018 IBM Corp.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/sysbus.h"
+#include "qemu/bitops.h"
+#include "hw/s390x/ap-bridge.h"
+#include "cpu.h"
+
+static char *ap_bus_get_dev_path(DeviceState *dev)
+{
+    /* at most one */
+    return g_strdup_printf("/1");
+}
+
+static void ap_bus_class_init(ObjectClass *oc, void *data)
+{
+    BusClass *k = BUS_CLASS(oc);
+
+    k->get_dev_path = ap_bus_get_dev_path;
+    /* More than one ap device does not make sense */
+    k->max_dev = 1;
+}
+
+static const TypeInfo ap_bus_info = {
+    .name = TYPE_AP_BUS,
+    .parent = TYPE_BUS,
+    .instance_size = 0,
+    .class_init = ap_bus_class_init,
+};
+
+void s390_init_ap(void)
+{
+    DeviceState *dev;
+
+    /* If no AP instructions then no need for AP bridge */
+    if (!s390_has_feat(S390_FEAT_AP)) {
+        return;
+    }
+
+    /* Create bridge device */
+    dev = qdev_create(NULL, TYPE_AP_BRIDGE);
+    object_property_add_child(qdev_get_machine(), TYPE_AP_BRIDGE,
+                              OBJECT(dev), NULL);
+    qdev_init_nofail(dev);
+
+    /* Create bus on bridge device */
+    qbus_create(TYPE_AP_BUS, dev, TYPE_AP_BUS);
+ }
+
+static void ap_bridge_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+
+    set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
+}
+
+static const TypeInfo ap_bridge_info = {
+    .name          = TYPE_AP_BRIDGE,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = 0,
+    .class_init    = ap_bridge_class_init,
+};
+
+static void ap_register(void)
+{
+    type_register_static(&ap_bridge_info);
+    type_register_static(&ap_bus_info);
+}
+
+type_init(ap_register)
diff --git a/hw/s390x/ap-device.c b/hw/s390x/ap-device.c
new file mode 100644
index 000000000000..fb6e35024c82
--- /dev/null
+++ b/hw/s390x/ap-device.c
@@ -0,0 +1,39 @@
+/*
+ * Adjunct Processor (AP) matrix device
+ *
+ * Copyright 2018 IBM Corp.
+ * Author(s): Tony Krowiak <address@hidden>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+#include "qemu/osdep.h"
+#include "qemu/module.h"
+#include "qapi/error.h"
+#include "hw/qdev.h"
+#include "hw/s390x/ap-device.h"
+
+static void ap_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->desc = "AP device class";
+    dc->hotpluggable = false;
+}
+
+static const TypeInfo ap_device_info = {
+    .name = AP_DEVICE_TYPE,
+    .parent = TYPE_DEVICE,
+    .instance_size = sizeof(APDevice),
+    .class_size = sizeof(DeviceClass),
+    .class_init = ap_class_init,
+    .abstract = true,
+};
+
+static void ap_device_register(void)
+{
+    type_register_static(&ap_device_info);
+}
+
+type_init(ap_device_register)
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index f0f7fdcaddf2..3c100c24f3e8 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -32,6 +32,7 @@
 #include "ipl.h"
 #include "hw/s390x/s390-virtio-ccw.h"
 #include "hw/s390x/css-bridge.h"
+#include "hw/s390x/ap-bridge.h"
 #include "migration/register.h"
 #include "cpu_models.h"
 #include "hw/nmi.h"
@@ -263,6 +264,9 @@ static void ccw_init(MachineState *machine)
     /* init the SIGP facility */
     s390_init_sigp();
 
+    /* create AP bridge and bus(es) */
+    s390_init_ap();
+
     /* get a BUS */
     css_bus = virtual_css_bus_init();
     s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline,
diff --git a/include/hw/s390x/ap-bridge.h b/include/hw/s390x/ap-bridge.h
new file mode 100644
index 000000000000..470e439a98ed
--- /dev/null
+++ b/include/hw/s390x/ap-bridge.h
@@ -0,0 +1,19 @@
+/*
+ * ap bridge
+ *
+ * Copyright 2018 IBM Corp.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#ifndef HW_S390X_AP_BRIDGE_H
+#define HW_S390X_AP_BRIDGE_H
+
+#define TYPE_AP_BRIDGE "ap-bridge"
+#define TYPE_AP_BUS "ap-bus"
+
+void s390_init_ap(void);
+
+#endif
diff --git a/include/hw/s390x/ap-device.h b/include/hw/s390x/ap-device.h
new file mode 100644
index 000000000000..4fb3c9ab82f2
--- /dev/null
+++ b/include/hw/s390x/ap-device.h
@@ -0,0 +1,23 @@
+/*
+ * Adjunct Processor (AP) matrix device interfaces
+ *
+ * Copyright 2018 IBM Corp.
+ * Author(s): Tony Krowiak <address@hidden>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+#ifndef HW_S390X_AP_DEVICE_H
+#define HW_S390X_AP_DEVICE_H
+
+#define AP_DEVICE_TYPE       "ap-device"
+
+typedef struct APDevice {
+    DeviceState parent_obj;
+} APDevice;
+
+#define AP_DEVICE(obj) \
+    OBJECT_CHECK(APDevice, (obj), AP_DEVICE_TYPE)
+
+#endif /* HW_S390X_AP_DEVICE_H */
-- 
2.19.0.221.g150f307