diff --git a/core/src/com/cloud/hypervisor/xen/resource/CitrixResourceBase.java b/core/src/com/cloud/hypervisor/xen/resource/CitrixResourceBase.java
index eda38edf31e..ec30c5b2e1e 100644
--- a/core/src/com/cloud/hypervisor/xen/resource/CitrixResourceBase.java
+++ b/core/src/com/cloud/hypervisor/xen/resource/CitrixResourceBase.java
@@ -245,8 +245,7 @@ public abstract class CitrixResourceBase implements ServerResource, HypervisorRe
     protected String _instance; //instance name (default is usually "VM")
 
     protected IAgentControl _agentControl;
-    
-    int _userVMCap = 0;
+
     final int _maxWeight = 256;
 
     protected final XenServerHost _host = new XenServerHost();
@@ -791,16 +790,19 @@ public abstract class CitrixResourceBase implements ServerResource, HypervisorRe
 
         Integer speed = vmSpec.getSpeed();
         if (speed != null) {
-            int utilization = _userVMCap; //cpu_cap
-            //Configuration cpu.uservm.cap is not available in default installation. Using this parameter is not encouraged
-            
+         
             int cpuWeight = _maxWeight; //cpu_weight
-            
+            int utilization = 0; // max CPU cap, default is unlimited
+
             // weight based allocation
             cpuWeight = (int)((speed*0.99) / _host.speed * _maxWeight);
             if (cpuWeight > _maxWeight) {
                 cpuWeight = _maxWeight;
             }
+
+            if (vmSpec.getLimitCpuUse()) {
+            	utilization = (int)((speed*0.99) / _host.speed * 100);
+            }
             
             vcpuParams.put("weight", Integer.toString(cpuWeight));
             vcpuParams.put("cap", Integer.toString(utilization));
diff --git a/setup/db/db/schema-224to225.sql b/setup/db/db/schema-224to225.sql
index 4bb38d5dcee..f48ab82f908 100644
--- a/setup/db/db/schema-224to225.sql
+++ b/setup/db/db/schema-224to225.sql
@@ -4,6 +4,8 @@
 
 ALTER TABLE `cloud`.`mshost` ADD COLUMN `runid` bigint NOT NULL DEFAULT 0 COMMENT 'run id, combined with msid to form a cluster session';
 ALTER TABLE `cloud`.`mshost` ADD COLUMN `state` varchar(10) NOT NULL default 'Down';
+ALTER TABLE `cloud`.`vm_instance` ADD COLUMN `limit_cpu_use` tinyint(1) NOT NULL DEFAULT 0 ;
+ALTER TABLE `cloud`.`service_offering` ADD COLUMN `limit_cpu_use` tinyint(1) NOT NULL DEFAULT 0 ;
 
 DROP TABLE IF EXISTS `cloud`.`certificate`;
 CREATE TABLE `cloud`.`keystore` (