block: Convert bdrv_discard() to byte-based

[mirror_qemu.git] / xen-hvm.c

diff --git a/xen-hvm.c b/xen-hvm.c
index a0da8d7d917b2c31f5ae8203a601c10cebca6ff2..eb577926a1c2f3eb55f883e5e8dfbf83a5d92479 100644 (file)
--- a/xen-hvm.c
+++ b/xen-hvm.c
@@ -9,7 +9,6 @@
  */
 
 #include "qemu/osdep.h"
-#include <sys/mman.h>
 
 #include "cpu.h"
 #include "hw/pci/pci.h"
@@ -191,6 +190,9 @@ static void xen_ram_init(PCMachineState *pcms,
     /* Handle the machine opt max-ram-below-4g.  It is basically doing
      * min(xen limit, user limit).
      */
+    if (!user_lowmem) {
+        user_lowmem = HVM_BELOW_4G_RAM_END; /* default */
+    }
     if (HVM_BELOW_4G_RAM_END <= user_lowmem) {
         user_lowmem = HVM_BELOW_4G_RAM_END;
     }