Add ability to install hwe/virtual linux kernel

Change-Id: Id2353d3982ad5146e14ba653ba6be4adec4b0030
Related-Prod: PROD-31654
diff --git a/README.rst b/README.rst
index ea0b419..a0fb69d 100644
--- a/README.rst
+++ b/README.rst
@@ -777,6 +777,25 @@
           headers: true
           version: 4.2.0-22
 
+Also it is possible to install Kernel with Hardware Enablement or virtual
+kernel packages. For example, for Xenial:
+
+.. code-block:: yaml
+
+    linux:
+      system:
+        kernel:
+          type: generic
+          extra: true
+          headers: true
+          version: 4.15.0-65
+          hwe:
+            type: hwe
+            version: 16.04
+            kernel_version: 4.15.0.65
+
+Set `linux:system:kernel:hwe:type:virtual` if you need Virtual kernel packages.
+
 Systcl kernel parameters:
 
 .. code-block:: yaml