Remove the deprecated -balloon option

The "-balloon" option has been replaced by "-device virtio-balloon".
It's been marked as deprecated since two releases, and nobody
complained, so let's remove it now.

Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Peter Krempa <pkrempa@redhat.com>
Acked-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

docs/virtio-balloon-stats.txt

@@ -61,9 +61,9 @@ It's also important to note the following:
    respond to the request the timer will never be re-armed, which has
    the same effect as disabling polling
 
-Here are a few examples. QEMU is started with '-balloon virtio', which
-generates '/machine/peripheral-anon/device[1]' as the QOM path for the
-balloon device.
+Here are a few examples. QEMU is started with '-device virtio-balloon',
+which generates '/machine/peripheral-anon/device[1]' as the QOM path for
+the balloon device.
 
 Enable polling with 2 seconds interval:
 

qemu-deprecated.texi

@@ -86,11 +86,6 @@ enabled via the ``-machine usb=on'' argument.
 
 The ``-nodefconfig`` argument is a synonym for ``-no-user-config``.
 
-@subsection -balloon (since 2.12.0)
-
-The @option{--balloon virtio} argument has been superseded by
-@option{--device virtio-balloon}.
-
 @subsection -fsdev handle (since 2.12.0)
 
 The ``handle'' fsdev backend does not support symlinks and causes the 9p

qemu-options.hx

@@ -454,16 +454,6 @@ modprobe i810_audio clocking=48000
 @end example
 ETEXI
 
-DEF("balloon", HAS_ARG, QEMU_OPTION_balloon,
-    "-balloon virtio[,addr=str]\n"
-    "                enable virtio balloon device (deprecated)\n", QEMU_ARCH_ALL)
-STEXI
-@item -balloon virtio[,addr=@var{addr}]
-@findex -balloon
-Enable virtio balloon device, optionally with PCI address @var{addr}. This
-option is deprecated, use @option{-device virtio-balloon} instead.
-ETEXI
-
 DEF("device", HAS_ARG, QEMU_OPTION_device,
     "-device driver[,prop[=value][,...]]\n"
     "                add device (based on driver)\n"

vl.c

@@ -2127,36 +2127,6 @@ static void parse_display(const char *p)
     }
 }
 
-static int balloon_parse(const char *arg)
-{
-    QemuOpts *opts;
-
-    warn_report("This option is deprecated. "
-                "Use '--device virtio-balloon' to enable the balloon device.");
-
-    if (strcmp(arg, "none") == 0) {
-        return 0;
-    }
-
-    if (!strncmp(arg, "virtio", 6)) {
-        if (arg[6] == ',') {
-            /* have params -> parse them */
-            opts = qemu_opts_parse_noisily(qemu_find_opts("device"), arg + 7,
-                                           false);
-            if (!opts)
-                return  -1;
-        } else {
-            /* create empty opts */
-            opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
-                                    &error_abort);
-        }
-        qemu_opt_set(opts, "driver", "virtio-balloon", &error_abort);
-        return 0;
-    }
-
-    return -1;
-}
-
 char *qemu_find_file(int type, const char *name)
 {
     int i;
@@ -3660,12 +3630,6 @@ int main(int argc, char **argv, char **envp)
             case QEMU_OPTION_no_hpet:
                 no_hpet = 1;
                 break;
-            case QEMU_OPTION_balloon:
-                if (balloon_parse(optarg) < 0) {
-                    error_report("unknown -balloon argument %s", optarg);
-                    exit(1);
-                }
-                break;
             case QEMU_OPTION_no_reboot:
                 no_reboot = 1;
                 break;