[v2,02/11] hw/s390/virtio-ccw: Convert to three-phase reset

Commit Message

Peter Maydell Aug. 30, 2024, 2:58 p.m. UTC

Convert the virtio-ccw code to three-phase reset.  This allows us to
remove a call to device_class_set_parent_reset(), replacing it with
the three-phase equivalent resettable_class_set_parent_phases().
Removing all the device_class_set_parent_reset() uses will allow us
to remove some of the glue code that interworks between three-phase
and legacy reset.

This is a simple conversion, with no behavioural changes.

Signed-off-by: Peter Maydell <[e-mail]>
Reviewed-by: Philippe Mathieu-Daudé <[e-mail]>
Reviewed-by: Nina Schoetterl-Glausch <[e-mail]>
Acked-by: Thomas Huth <[e-mail]>
Reviewed-by: Richard Henderson <[e-mail]>
---
 hw/s390x/virtio-ccw.h |  2 +-
 hw/s390x/virtio-ccw.c | 13 ++++++++-----
 2 files changed, 9 insertions(+), 6 deletions(-)

Patch

diff --git a/hw/s390x/virtio-ccw.h b/hw/s390x/virtio-ccw.h
index fac186c8f64..c7a830a1944 100644
--- a/hw/s390x/virtio-ccw.h
+++ b/hw/s390x/virtio-ccw.h
@@ -57,7 +57,7 @@  struct VirtIOCCWDeviceClass {
     CCWDeviceClass parent_class;
     void (*realize)(VirtioCcwDevice *dev, Error **errp);
     void (*unrealize)(VirtioCcwDevice *dev);
-    void (*parent_reset)(DeviceState *dev);
+    ResettablePhases parent_phases;
 };
 
 /* Performance improves when virtqueue kick processing is decoupled from the
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index b4676909dd6..96747318d2a 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -913,14 +913,15 @@  static void virtio_ccw_notify(DeviceState *d, uint16_t vector)
     }
 }
 
-static void virtio_ccw_reset(DeviceState *d)
+static void virtio_ccw_reset_hold(Object *obj, ResetType type)
 {
-    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
+    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(obj);
     VirtIOCCWDeviceClass *vdc = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
 
     virtio_ccw_reset_virtio(dev);
-    if (vdc->parent_reset) {
-        vdc->parent_reset(d);
+
+    if (vdc->parent_phases.hold) {
+        vdc->parent_phases.hold(obj, type);
     }
 }
 
@@ -1233,11 +1234,13 @@  static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
     CCWDeviceClass *k = CCW_DEVICE_CLASS(dc);
     VirtIOCCWDeviceClass *vdc = VIRTIO_CCW_DEVICE_CLASS(klass);
+    ResettableClass *rc = RESETTABLE_CLASS(klass);
 
     k->unplug = virtio_ccw_busdev_unplug;
     dc->realize = virtio_ccw_busdev_realize;
     dc->unrealize = virtio_ccw_busdev_unrealize;
-    device_class_set_parent_reset(dc, virtio_ccw_reset, &vdc->parent_reset);
+    resettable_class_set_parent_phases(rc, NULL, virtio_ccw_reset_hold, NULL,
+                                       &vdc->parent_phases);
 }
 
 static const TypeInfo virtio_ccw_device_info = {