commit c8a6ae8bb95477d5ac11d9b491b603b2d190a96e
author Amos Kong <akong@redhat.com> Tue Mar 19 14:23:27 2013 +0800
committer Anthony Liguori <aliguori@us.ibm.com> Tue Mar 19 08:00:10 2013 -0500
tree 5c648dc30f4ee7c40e2c1eacd86c33200acd1d6a
parent 8510d91ebad522685bc1a29e7bbc1f5050af0d2c

add a boot option to do strict boot

Seabios already added a new device type to halt booting.
Qemu can add "HALT" at the end of bootindex string, then
seabios will halt booting after trying to boot from all
selected devices.

This patch added a new boot option to configure if boot
from un-selected devices.

This option only effects when boot priority is changed by
bootindex options, the old style(-boot order=..) will still
try to boot from un-selected devices.

v2: add HALT entry in get_boot_devices_list()
v3: rebase to latest qemu upstream

Signed-off-by: Amos Kong <akong@redhat.com>
Message-id: 1363674207-31496-1-git-send-email-akong@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

vl.c

diff --git a/vl.c b/vl.c
index ce51e65..aeed7f4 100644
--- a/vl.c
+++ b/vl.c
@@ -234,6 +234,7 @@
 unsigned int nb_prom_envs = 0;
 const char *prom_envs[MAX_PROM_ENVS];
 int boot_menu;
+bool boot_strict;
 uint8_t *boot_splash_filedata;
 size_t boot_splash_filedata_size;
 uint8_t qemu_extra_params_fw[2];
@@ -458,6 +459,9 @@
         }, {
             .name = "reboot-timeout",
             .type = QEMU_OPT_STRING,
+        }, {
+            .name = "strict",
+            .type = QEMU_OPT_STRING,
         },
         { /*End of list */ }
     },
@@ -1267,6 +1271,12 @@
 
     *size = total;
 
+    if (boot_strict && *size > 0) {
+        list[total-1] = '\n';
+        list = g_realloc(list, total + 4);
+        memcpy(&list[total], "HALT", 4);
+        *size = total + 4;
+    }
     return list;
 }
 
@@ -3131,7 +3141,7 @@
                     static const char * const params[] = {
                         "order", "once", "menu",
                         "splash", "splash-time",
-                        "reboot-timeout", NULL
+                        "reboot-timeout", "strict", NULL
                     };
                     char buf[sizeof(boot_devices)];
                     char *standard_boot_devices;
@@ -3174,6 +3184,19 @@
                                 exit(1);
                             }
                         }
+                        if (get_param_value(buf, sizeof(buf),
+                                            "strict", optarg)) {
+                            if (!strcmp(buf, "on")) {
+                                boot_strict = true;
+                            } else if (!strcmp(buf, "off")) {
+                                boot_strict = false;
+                            } else {
+                                fprintf(stderr,
+                                        "qemu: invalid option value '%s'\n",
+                                        buf);
+                                exit(1);
+                            }
+                        }
                         if (!qemu_opts_parse(qemu_find_opts("boot-opts"),
                                              optarg, 0)) {
                             exit(1);