diff --git a/misc/config_tools/xforms/config.h.xsl b/misc/config_tools/xforms/config.h.xsl
index eff2ee96a..e4cd0cca5 100644
--- a/misc/config_tools/xforms/config.h.xsl
+++ b/misc/config_tools/xforms/config.h.xsl
@@ -6,7 +6,9 @@
 <xsl:stylesheet
     version="1.0"
     xmlns:xi="http://www.w3.org/2003/XInclude"
-    xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+    xmlns:acrn="http://projectacrn.org">
+  <xsl:include href="lib.xsl" />
   <xsl:output method="text" />
 
   <xsl:variable name="integer-suffix" select="'U'" />
diff --git a/misc/config_tools/xforms/config.mk.xsl b/misc/config_tools/xforms/config.mk.xsl
index 8b88da702..6ebf6e80c 100644
--- a/misc/config_tools/xforms/config.mk.xsl
+++ b/misc/config_tools/xforms/config.mk.xsl
@@ -6,7 +6,9 @@
 <xsl:stylesheet
     version="1.0"
     xmlns:xi="http://www.w3.org/2003/XInclude"
-    xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+    xmlns:acrn="http://projectacrn.org">
+  <xsl:include href="lib.xsl" />
   <xsl:output method="text" />
 
   <xsl:variable name="integer-suffix" select="''" />
diff --git a/misc/config_tools/xforms/config_common.xsl b/misc/config_tools/xforms/config_common.xsl
index e1f1db897..087811aea 100644
--- a/misc/config_tools/xforms/config_common.xsl
+++ b/misc/config_tools/xforms/config_common.xsl
@@ -258,11 +258,20 @@
         <xsl:if test="position() = 1"><xsl:value-of select="."/></xsl:if>
       </xsl:for-each>
     </xsl:variable>
-    <xsl:call-template name="integer-by-key-value">
-      <xsl:with-param name="key" select="'MAX_MSIX_TABLE_NUM'" />
-      <xsl:with-param name="value" select="$max" />
-      <xsl:with-param name="default" select="'64'" />
-    </xsl:call-template>
+    <xsl:choose>
+      <xsl:when test="//CAPACITIES/MAX_MSIX_TABLE_NUM/text()">
+        <xsl:call-template name="integer-by-key-value">
+          <xsl:with-param name="key" select="'MAX_MSIX_TABLE_NUM'" />
+          <xsl:with-param name="value" select="acrn:max($max, //CAPACITIES/MAX_MSIX_TABLE_NUM)" />
+        </xsl:call-template>
+      </xsl:when>
+      <xsl:otherwise>
+        <xsl:call-template name="integer-by-key-value">
+          <xsl:with-param name="key" select="'MAX_MSIX_TABLE_NUM'" />
+          <xsl:with-param name="value" select="$max" />
+        </xsl:call-template>
+      </xsl:otherwise>
+    </xsl:choose>
   </xsl:template>
 
   <xsl:template name="hex-to-bin">
diff --git a/misc/config_tools/xforms/lib.xsl b/misc/config_tools/xforms/lib.xsl
index dcdb98c26..1bc1d5a96 100644
--- a/misc/config_tools/xforms/lib.xsl
+++ b/misc/config_tools/xforms/lib.xsl
@@ -128,6 +128,19 @@
     </xsl:choose>
   </func:function>
 
+  <func:function name="acrn:max">
+    <xsl:param name="a" />
+    <xsl:param name="b" />
+    <xsl:choose>
+      <xsl:when test="$a &gt; $b">
+        <func:result select="$a" />
+      </xsl:when>
+      <xsl:otherwise>
+        <func:result select="$b" />
+      </xsl:otherwise>
+    </xsl:choose>
+  </func:function>
+
   <func:function name="acrn:find-list-min">
     <xsl:param name="list" />
     <xsl:param name="delimar" />