[PATCH v6 18/19] vfio-user: handle reset of remote device

[Jagannathan Raman]

Adds handler to reset a remote device

Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Signed-off-by: John G Johnson <john.g.johnson@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
---
 hw/remote/vfio-user-obj.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/hw/remote/vfio-user-obj.c b/hw/remote/vfio-user-obj.c
index 2304643003..55f1bf5e0f 100644
--- a/hw/remote/vfio-user-obj.c
+++ b/hw/remote/vfio-user-obj.c
@@ -989,6 +989,19 @@ static bool vfu_object_migratable(VfuObject *o)
     return dc->vmsd && !dc->vmsd->unmigratable;
 }
 
+static int vfu_object_device_reset(vfu_ctx_t *vfu_ctx, vfu_reset_type_t type)
+{
+    VfuObject *o = vfu_get_private(vfu_ctx);
+
+    if (type == VFU_RESET_LOST_CONN) {
+        return 0;
+    }
+
+    qdev_reset_all(DEVICE(o->pci_dev));
+
+    return 0;
+}
+
 /*
  * TYPE_VFU_OBJECT depends on the availability of the 'socket' and 'device'
  * properties. It also depends on devices instantiated in QEMU. These
@@ -1105,6 +1118,12 @@ static void vfu_object_init_ctx(VfuObject *o, Error 
**errp)
         goto fail;
     }
 
+    ret = vfu_setup_device_reset_cb(o->vfu_ctx, &vfu_object_device_reset);
+    if (ret < 0) {
+        error_setg(errp, "vfu: Failed to setup reset callback");
+        goto fail;
+    }
+
     if (!vfu_object_migratable(o)) {
         goto realize_ctx;
     }
-- 
2.20.1