[SeaBIOS] [Qemu-devel] [RFC] Passing boot order from qemu to seabios

H. Peter Anvin hpa at zytor.com
Tue Oct 12 18:33:16 CEST 2010

On 10/12/2010 01:01 AM, Gleb Natapov wrote:
> On Mon, Oct 11, 2010 at 02:15:26PM -0700, H. Peter Anvin wrote:
>>> I don't disagree.
>>> I think the best thing to do is to let SeaBIOS create a boot order table 
>>> that contains descriptive information and then advertise that to QEMU.
>>> QEMU can then try to associate the list of bootable devices with it's 
>>> own set of devices and select a preferred order that it can then give 
>>> back to SeaBIOS.  SeaBIOS can then present that list to the user for 
>>> additional refinement.
>> Really, this kind of comes down to having a data structure that anything
>> (Qemu, SeaBIOS and if needed the guest OS) can read and modify as needed.
> But then QEMU and seabios will have to have shared storage they can
> both write too. And this shared storage is part of VM now so you need
> to carry it around when you move your VM elsewhere.

Yes, and it's part of real hardware, too.  It's usually called "the
CMOS", short for CMOS RAM.


H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

More information about the SeaBIOS mailing list