----- Original Message -----
On 01/09/2013 01:39 AM, Amos Kong wrote:
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.
We need to make it configurable. I already posted a seabios patch to add 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 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() define boot_strict to bool
Signed-off-by: Amos Kong akong@redhat.com
Libvirt will need to expose an attribute that lets the user control whether to use this new option; how do we probe via QMP whether the new -boot strict=on command-line option is available?
Hi all,
How about add new info/query command?
(hmp) info strict-boot on
(qmp) {"execute": "query-strict-boot"} {"return": {"state": true}}
+++ b/qemu-options.hx @@ -376,14 +376,14 @@ ETEXI
DEF("boot", HAS_ARG, QEMU_OPTION_boot, "-boot [order=drives][,once=drives][,menu=on|off]\n"
- " [,splash=sp_name][,splash-time=sp_time][,reboot-timeout=rb_time]\n"
- " [,splash=sp_name][,splash-time=sp_time][,reboot-timeout=rb_time][,strict=on|off]\n" " 'drives': floppy (a), hard disk (c), CD-ROM (d), network (n)\n" " 'sp_name': the file's name that would be passed to bios as logo picture, if menu=on\n" " 'sp_time': the period that splash picture last if menu=on, unit is ms\n" " 'rb_timeout': the timeout before guest reboot when boot failed, unit is ms\n",
So if I understand correctly, -boot order=... is incompatible with -boot strict=on;
They are not incompatible, order will effect the priority, strict decides if boot from un-selected device.
even though you have listed both options under a single -boot entry in the -help. We've already declared that -help output is no longer guaranteed stable, so this doesn't really impact libvirt, but would it make any more sense to list this as two orthogonal entries, to make it clear that they don't mix?
-boot order=drivers[,once=drives]... -boot strict=on|off[,menu=on|off]...
But this is all bikeshedding, so it's not worth a v3 if you disagree.
-- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org