Patchwork [SeaBIOS,v3] boot: add a new type to halt booting

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Submitter Amos Kong
Date Jan. 9, 2013, 5:17 a.m.
Message ID <1357708627-14094-1-git-send-email-akong@redhat.com>
Download mbox | patch
Permalink /patch/210621/
State New
Headers show

Comments

Amos Kong - Jan. 9, 2013, 5:17 a.m.
Current seabios will try to boot from selected devices first,
if they are all failed, seabios will also try to boot from
un-selected devices.

For example:
@ qemu-kvm -boot order=n,menu=on ...

Guest will boot from network first, if it's failed, guest will try to
boot from other un-selected devices (floppy, cdrom, disk) one by one.

We need to make it configurable. This patch added a new type, qemu can
add "HALT" at the end of bootindex string, then seabios will halt
booting after trying to boot from selected devices.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Signed-off-by: Amos Kong <akong@redhat.com>
---
v3: add a new type to halt booting (Kevin)

Patch

diff --git a/src/boot.c b/src/boot.c
index c67cc7f..eea2354 100644
--- a/src/boot.c
+++ b/src/boot.c
@@ -291,6 +291,7 @@  static struct bootentry_s *BootList;
 #define IPL_TYPE_CBFS        0x20
 #define IPL_TYPE_BEV         0x80
 #define IPL_TYPE_BCV         0x81
+#define IPL_TYPE_HALT        0xf0
 
 static void
 bootentry_add(int type, int prio, u32 data, const char *desc)
@@ -488,6 +489,11 @@  boot_prep(void)
     interactive_bootmenu();
     wait_threads();
 
+    int haltprio = find_prio("HALT");
+
+    if (haltprio >= 0)
+        bootentry_add(IPL_TYPE_HALT, haltprio, 0, "HALT");
+
     // Map drives and populate BEV list
     struct bootentry_s *pos = BootList;
     while (pos) {
@@ -672,6 +678,9 @@  do_boot(int seq_nr)
     case IPL_TYPE_BEV:
         boot_rom(ie->vector);
         break;
+    case IPL_TYPE_HALT:
+        boot_fail();
+        break;
     }
 
     // Boot failed: invoke the boot recovery function