diff -ur -x .cproject -x .project -x '*.swp' xen-4.6.1/tools/libxl/libxl_cpuid.c xen-4.6.1-new/tools/libxl/libxl_cpuid.c
--- xen-4.6.1/tools/libxl/libxl_cpuid.c	2016-02-09 16:44:19.000000000 +0200
+++ xen-4.6.1-new/tools/libxl/libxl_cpuid.c	2016-07-10 12:09:36.092000000 +0300
@@ -318,12 +318,31 @@
         if (endptr == NULL) {
             endptr = strchr(str, 0);
         }
-        if (endptr - str != 32) {
-            return 5;
-        }
+
         entry->policy[value] = calloc(32 + 1, 1);
-        strncpy(entry->policy[value], str, 32);
+        switch (endptr - str) {
+        	case 32: {
+                strncpy(entry->policy[value], str, 32);
+        		}
+        	break;
+        	case 8: {
+        		uint32_t cpuid_hex = strtoul(str,&endptr,16);
+        		if ( str +8 != endptr )
+        			return 6;
+        		for (int i=0;i<32;i++) {
+        			if ( cpuid_hex & (1<<i) )
+        				entry->policy[value][31-i]='1';
+        			else
+        				entry->policy[value][31-i]='0';
+        		}
+				entry->policy[value][32]=0;
+        		}
+        	break;
+        	default:
+        		return 5;
+        }
         entry->policy[value][32] = 0;
+
         if (*endptr == 0) {
             break;
         }
diff -ur -x .cproject -x .project -x '*.swp' xen-4.6.1/tools/libxl/xl_cmdimpl.c xen-4.6.1-new/tools/libxl/xl_cmdimpl.c
--- xen-4.6.1/tools/libxl/xl_cmdimpl.c	2016-07-11 23:45:45.046000000 +0300
+++ xen-4.6.1-new/tools/libxl/xl_cmdimpl.c	2016-07-10 12:07:55.564000000 +0300
@@ -2095,7 +2095,10 @@
                     errstr = "invalid register name (must be e[abcd]x)";
                     break;
                 case 5:
-                    errstr = "policy string must be exactly 32 characters long";
+                    errstr = "policy string must be exactly 32 (binary) or 8 (hex) characters long";
+                    break;
+                case 6:
+                    errstr = "error decoding policy string";
                     break;
                 default:
                     errstr = "unknown error";