Replace -no-virtio-balloon by -balloon

We want to do (at least) two things to the virtio-balloon device:
suppress it, and control its PCI address.  Option -no-virtio-balloon
lets us do only the former.  To get the latter, replace
-no-virtio-balloon with

    -balloon none   disable balloon device
    -balloon virtio[,addr=str]
                    enable virtio balloon device (default)

Syntax suggested by Anthony Liguori.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/sysemu.h b/sysemu.h
index 8744347f28..06dc4c6868 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -116,7 +116,8 @@ extern int win2k_install_hack;
 extern int rtc_td_hack;
 extern int alt_grab;
 extern int usb_enabled;
-extern int no_virtio_balloon;
+extern int virtio_balloon;
+extern const char *virtio_balloon_devaddr;
 extern int smp_cpus;
 extern int cursor_hide;
 extern int graphic_rotate;