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, 3 insertions, 2 deletions

diff --git a/hw/pc.c b/hw/pc.c
index f02a2b5799..553ba5c84e 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -1408,8 +1408,9 @@ static void pc_init1(ram_addr_t ram_size,
     }
 
     /* Add virtio balloon device */
-    if (pci_enabled && !no_virtio_balloon) {
-        pci_create_simple(pci_bus, -1, "virtio-balloon-pci");
+    if (pci_enabled && virtio_balloon) {
+        pci_dev = pci_create("virtio-balloon-pci", virtio_balloon_devaddr);
+        qdev_init(&pci_dev->qdev);
     }
 
     /* Add virtio console devices */