Add boot-once support
This allows to specify an exceptional boot order only for the first
startup of the guest. After reboot, qemu will switch back to the default
order (or what was specified via 'order='). Makes installing from CD
images and then booting the freshly set up harddisk more handy.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/vl.c b/vl.c
index 963b899..7360d4f 100644
--- a/vl.c
+++ b/vl.c
@@ -2402,6 +2402,16 @@
return bitmap;
}
+static void restore_boot_devices(void *opaque)
+{
+ char *standard_boot_devices = opaque;
+
+ qemu_boot_set(standard_boot_devices);
+
+ qemu_unregister_reset(restore_boot_devices, standard_boot_devices);
+ qemu_free(standard_boot_devices);
+}
+
static void numa_add(const char *optarg)
{
char option[128];
@@ -5111,9 +5121,10 @@
case QEMU_OPTION_boot:
{
static const char * const params[] = {
- "order", NULL
+ "order", "once", NULL
};
char buf[sizeof(boot_devices)];
+ char *standard_boot_devices;
int legacy = 0;
if (!strchr(optarg, '=')) {
@@ -5131,6 +5142,16 @@
boot_devices_bitmap = parse_bootdevices(buf);
pstrcpy(boot_devices, sizeof(boot_devices), buf);
}
+ if (!legacy) {
+ if (get_param_value(buf, sizeof(buf),
+ "once", optarg)) {
+ boot_devices_bitmap |= parse_bootdevices(buf);
+ standard_boot_devices = qemu_strdup(boot_devices);
+ pstrcpy(boot_devices, sizeof(boot_devices), buf);
+ qemu_register_reset(restore_boot_devices,
+ standard_boot_devices);
+ }
+ }
}
break;
case QEMU_OPTION_fda:
