diff --git a/neutron_lib/api/definitions/portbindings.py b/neutron_lib/api/definitions/portbindings.py
index 8b510218a..87bf699aa 100644
--- a/neutron_lib/api/definitions/portbindings.py
+++ b/neutron_lib/api/definitions/portbindings.py
@@ -122,10 +122,16 @@ VNIC_SMARTNIC = 'smart-nic'
 #          kernel 5.7 to implement  a vhost offload of a standard virtio-net
 #          interface to a software or hardware backend.
 VNIC_VHOST_VDPA = 'vdpa'
+# - accelerator: Refers to any device that supports hardware acceleration of
+#                any kind and is provided by Cyborg
+#                (https://wiki.openstack.org/wiki/Cyborg).
+VNIC_ACCELERATOR_DIRECT = 'accelerator-direct'
+VNIC_ACCELERATOR_DIRECT_PHYSICAL = 'accelerator-direct-physical'
 
 VNIC_TYPES = [VNIC_NORMAL, VNIC_DIRECT, VNIC_MACVTAP, VNIC_BAREMETAL,
               VNIC_DIRECT_PHYSICAL, VNIC_VIRTIO_FORWARDER, VNIC_SMARTNIC,
-              VNIC_VHOST_VDPA]
+              VNIC_VHOST_VDPA, VNIC_ACCELERATOR_DIRECT,
+              VNIC_ACCELERATOR_DIRECT_PHYSICAL]
 
 # VIF_DETAILS_CONNECTIVITY: Indicates what kind of connectivity the network
 #                           back-end provides: L2, L3 or not specified.
diff --git a/releasenotes/notes/vnic-accelerator-eaf9b583d60e76ce.yaml b/releasenotes/notes/vnic-accelerator-eaf9b583d60e76ce.yaml
new file mode 100644
index 000000000..a0f617a10
--- /dev/null
+++ b/releasenotes/notes/vnic-accelerator-eaf9b583d60e76ce.yaml
@@ -0,0 +1,8 @@
+---
+features:
+  - |
+    Added VNIC types ``accelerator-direct`` and
+    ``accelerator-direct-physical``. Represents a port that supports any kind
+    of hardware acceleration and is provided by Cyborg
+    (https://wiki.openstack.org/wiki/Cyborg). `RFE: 1909100
+    <https://bugs.launchpad.net/neutron/+bug/1909100>`_.