OvmfPkg/PlatformPei: Add mXen boolean to indicate Xen is running

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15201 6f19259b-4bc3-4df7-8a09-765794883524

OvmfPkg/PlatformPei/Platform.c

@@ -424,13 +424,13 @@ InitializePlatform (
 
   PublishPeiMemory ();
 
-  if (XenLeaf != 0) {
+  if (mXen) {
     PcdSetBool (PcdPciDisableBusEnumeration, TRUE);
   } else {
     TopOfMemory = MemDetect ();
   }
 
-  if (XenLeaf != 0) {
+  if (mXen) {
     DEBUG ((EFI_D_INFO, "Xen was detected\n"));
     InitializeXen (XenLeaf);
   }
@@ -439,7 +439,7 @@ InitializePlatform (
 
   PeiFvInitialization ();
 
-  if (XenLeaf != 0) {
+  if (mXen) {
     XenMemMapInitialization ();
   } else {
     MemMapInitialization (TopOfMemory);