vhost-scsi-ccw: new device supporting the tcm_vhost Linux kernel module

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

2 files changed, 65 insertions, 0 deletions

diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index 52325263ab..56539d34e3 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -687,6 +687,28 @@ static void virtio_ccw_scsi_instance_init(Object *obj)
     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
 }
 
+#ifdef CONFIG_VHOST_SCSI
+static int vhost_ccw_scsi_init(VirtioCcwDevice *ccw_dev)
+{
+    VHostSCSICcw *dev = VHOST_SCSI_CCW(ccw_dev);
+    DeviceState *vdev = DEVICE(&dev->vdev);
+
+    qdev_set_parent_bus(vdev, BUS(&ccw_dev->bus));
+    if (qdev_init(vdev) < 0) {
+        return -1;
+    }
+
+    return virtio_ccw_device_init(ccw_dev, VIRTIO_DEVICE(vdev));
+}
+
+static void vhost_ccw_scsi_instance_init(Object *obj)
+{
+    VHostSCSICcw *dev = VHOST_SCSI_CCW(obj);
+    object_initialize(OBJECT(&dev->vdev), TYPE_VHOST_SCSI);
+    object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
+}
+#endif
+
 static int virtio_ccw_rng_init(VirtioCcwDevice *dev)
 {
     VirtIODevice *vdev;
@@ -897,6 +919,34 @@ static const TypeInfo virtio_ccw_scsi = {
     .class_init    = virtio_ccw_scsi_class_init,
 };
 
+#ifdef CONFIG_VHOST_SCSI
+static Property vhost_ccw_scsi_properties[] = {
+    DEFINE_PROP_STRING("devno", VirtioCcwDevice, bus_id),
+    DEFINE_VHOST_SCSI_PROPERTIES(VirtIOSCSICcw, vdev.parent_obj.conf),
+    DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice, host_features[0]),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void vhost_ccw_scsi_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
+
+    k->init = vhost_ccw_scsi_init;
+    k->exit = virtio_ccw_exit;
+    dc->reset = virtio_ccw_reset;
+    dc->props = vhost_ccw_scsi_properties;
+}
+
+static const TypeInfo vhost_ccw_scsi = {
+    .name          = TYPE_VHOST_SCSI_CCW,
+    .parent        = TYPE_VIRTIO_CCW_DEVICE,
+    .instance_size = sizeof(VirtIOSCSICcw),
+    .instance_init = vhost_ccw_scsi_instance_init,
+    .class_init    = vhost_ccw_scsi_class_init,
+};
+#endif
+
 static void virtio_ccw_rng_initfn(Object *obj)
 {
     VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(obj);
@@ -1054,6 +1104,7 @@ static void virtio_ccw_register(void)
     type_register_static(&virtio_ccw_net);
     type_register_static(&virtio_ccw_balloon);
     type_register_static(&virtio_ccw_scsi);
+    type_register_static(&vhost_ccw_scsi);
     type_register_static(&virtio_ccw_rng);
     type_register_static(&virtual_css_bridge_info);
 }
diff --git a/hw/s390x/virtio-ccw.h b/hw/s390x/virtio-ccw.h
index 35ab1a5ef2..84055e71da 100644
--- a/hw/s390x/virtio-ccw.h
+++ b/hw/s390x/virtio-ccw.h
@@ -16,6 +16,9 @@
 #include <hw/virtio/virtio-net.h>
 #include <hw/virtio/virtio-serial.h>
 #include <hw/virtio/virtio-scsi.h>
+#ifdef CONFIG_VHOST_SCSI
+#include <hw/virtio/vhost-scsi.h>
+#endif
 #include <hw/virtio/virtio-balloon.h>
 #include <hw/virtio/virtio-rng.h>
 #include <hw/virtio/virtio-bus.h>
@@ -101,6 +104,17 @@ typedef struct VirtIOSCSICcw {
     VirtIOSCSI vdev;
 } VirtIOSCSICcw;
 
+/* vhost-scsi-ccw */
+
+#define TYPE_VHOST_SCSI_CCW "vhost-scsi-ccw"
+#define VHOST_SCSI_CCW(obj) \
+        OBJECT_CHECK(VHostSCSICcw, (obj), TYPE_VHOST_SCSI_CCW)
+
+typedef struct VHostSCSICcw {
+    VirtioCcwDevice parent_obj;
+    VHostSCSI vdev;
+} VHostSCSICcw;
+
 /* virtio-blk-ccw */
 
 #define TYPE_VIRTIO_BLK_CCW "virtio-blk-ccw"