diff --git a/Virtualization/ch_lpar_option.xml b/Virtualization/ch_lpar_option.xml
index 2e8ca3c..4f1d369 100644
--- a/Virtualization/ch_lpar_option.xml
+++ b/Virtualization/ch_lpar_option.xml
@@ -9355,6 +9355,11 @@ hcall ( const uint64 H_CLEAR_HPT);]]></programlisting>
                   </listitem>
                 </itemizedlist>		      
               </listitem>
+
+              <listitem>
+                <para>If the partition is not in XIVE legacy mode, the Hypervisor returns
+                H_Function.</para>
+              </listitem>
             </itemizedlist>		      
           </simplesect>
         </section>
@@ -9397,6 +9402,12 @@ hcall ( const uint64 H_CLEAR_HPT);]]></programlisting>
                 H_Success or H_Hardware (if an unrecoverable hardware error
                 occurred).</para>
               </listitem>
+
+              <listitem>
+                <para>If the partition is not in XIVE legacy mode, the Hypervisor returns
+                H_Function.</para>
+              </listitem>
+
             </itemizedlist>		      
           </simplesect>
         </section>
@@ -9457,6 +9468,12 @@ hcall ( const uint64 H_CLEAR_HPT);]]></programlisting>
                   </listitem>
                 </itemizedlist>		      
               </listitem>
+
+              <listitem>
+                <para>If the partition is not in XIVE legacy mode, the Hypervisor returns
+                H_Function.</para>
+              </listitem>
+
             </itemizedlist>		      
 
           </simplesect>
@@ -9505,6 +9522,11 @@ hcall ( const uint64 H_CLEAR_HPT);]]></programlisting>
                   </listitem>
                 </itemizedlist>		      
               </listitem>
+
+              <listitem>
+                <para>If the partition is not in XIVE legacy mode, the Hypervisor returns
+                H_Function.</para>
+              </listitem>
             </itemizedlist>		      
           </simplesect>
         </section>
@@ -9524,6 +9546,7 @@ hcall ( const uint64 H_CLEAR_HPT);]]></programlisting>
 int64                  /* H_Success: Expected Return code */
                        /* H_Hardware: The hcall() experienced a hardware fault */
                        /*   potentially preventing the function */
+                       /* H_Function: The calling OS is not in XIVE legacy mode */
 hcall ( const uint64 H_XIRR-X,/* Accept an interrupt returning the external  */
                        /*   interrupt request register */
         uint8 cppr );]]></programlisting>
@@ -9568,6 +9591,11 @@ hcall ( const uint64 H_XIRR-X,/* Accept an interrupt returning the external  */
                 <para>Hypervisor then returns H_Success or H_Hardware (if an
                 unrecoverable hardware error occurred).</para>
               </listitem>
+
+              <listitem>
+                <para>If the partition is not in XIVE legacy mode, the Hypervisor returns
+                H_Function.</para>
+              </listitem>
             </itemizedlist>		      
           </simplesect>
         </section>