diff --git a/README.rst b/README.rst
index 0943db2..f271647 100644
--- a/README.rst
+++ b/README.rst
@@ -368,6 +368,9 @@
               name: "a1"
               product_id: "154d"
               vendor_id: "8086"
+          passthrough_whitelist:
+            - vendor_id: "10de"
+              product_id: "1db4"
         network:
           engine: neutron
           host: 127.0.0.1
@@ -524,7 +527,7 @@
         barbican:
           enabled: true
 
-Define aliases for PCI devices:
+Define aliases for a PCI passthrough devices:
 .. code-block:: yaml
 
     nova:
@@ -538,6 +541,17 @@
               product_id: "154d"
               vendor_id: "8086"
 
+Define white list of PCI devices available to VMs:
+.. code-block:: yaml
+
+    nova:
+      compute:
+        ...
+        pci:
+          passthrough_whitelist:
+            - vendor_id: "10de"
+              product_id: "1db4"
+
 Nova metadata custom bindings:
 
 .. code-block:: yaml