f05f47bb5f
Either 'once' option or 'order' option can take effect for -boot at the same time, that is say initial startup processing can check only one. And pc.c's set_boot_dev() fails when its boot order argument is invalid. This patch provide a solution fix this problem: 1. If "once" is given, register reset handler to restore boot order. 2. Pass the normal boot order to machine creation. Should fail when the normal boot order is invalid. 3. If "once" is given, set it with qemu_boot_set(). Fails when the once boot order is invalid. 4. Start the machine. 5. On reset, the reset handler calls qemu_boot_set() to restore boot order. Should never fail. Suggested-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Gonglei <arei.gonglei@huawei.com> Reviewed-by: Markus Armbruster <armbru@redhat.com>
Read the documentation in qemu-doc.html or on http://wiki.qemu-project.org - QEMU team