On Thu, Apr 12, 2012 at 01:30:36PM -0600, Steve Goodrich wrote:
I'm working towards a goal of having specific devices be bootable, and *only* those devices. For example, if my bootorder file specifies SATA drive 3, I do not want it to try SATA drives 0, 1, and 2, nor any other HDD or floppy that it finds.
My first question is: how do I do this?
There is no current way to do this. I suppose one could code support for a "stop boot" option to the boot order file - so that if it was listed in the file the boot would stop after trying all options prior to it.
If that can't be answered, can someone explain to me the relationship between the bootorder file and the BEV (Boot Execution Vector) configured in boot.c?
All possible boot options (both BEV and BCV) are assembled in a sorted list pointed to by boot.c:BootList. The bootorder file alters the default sort order of that list. During the latter parts of the POST phase, the BCVs are executed and only BEVs remain. The list of BEVs is generated from the BootList. So, in a nutshell, the bootorder file determines the order of the BEVs that SeaBIOS will attempt to boot from.
-Kevin
On Sat, Apr 14, 2012 at 11:19:31PM -0400, Kevin O'Connor wrote:
On Thu, Apr 12, 2012 at 01:30:36PM -0600, Steve Goodrich wrote:
I'm working towards a goal of having specific devices be bootable, and *only* those devices. For example, if my bootorder file specifies SATA drive 3, I do not want it to try SATA drives 0, 1, and 2, nor any other HDD or floppy that it finds.
My first question is: how do I do this?
There is no current way to do this. I suppose one could code support for a "stop boot" option to the boot order file - so that if it was listed in the file the boot would stop after trying all options prior to it.
I thought to add skipboot file. If device is in skipboot file it is not considered for booting from.
If that can't be answered, can someone explain to me the relationship between the bootorder file and the BEV (Boot Execution Vector) configured in boot.c?
All possible boot options (both BEV and BCV) are assembled in a sorted list pointed to by boot.c:BootList. The bootorder file alters the default sort order of that list. During the latter parts of the POST phase, the BCVs are executed and only BEVs remain. The list of BEVs is generated from the BootList. So, in a nutshell, the bootorder file determines the order of the BEVs that SeaBIOS will attempt to boot from.
-Kevin
SeaBIOS mailing list SeaBIOS@seabios.org http://www.seabios.org/mailman/listinfo/seabios
-- Gleb.
Why would anyone want to define some devices as unbootable?
On Sun, Apr 15, 2012 at 8:57 AM, Gleb Natapov gleb@redhat.com wrote:
On Sat, Apr 14, 2012 at 11:19:31PM -0400, Kevin O'Connor wrote:
On Thu, Apr 12, 2012 at 01:30:36PM -0600, Steve Goodrich wrote:
I'm working towards a goal of having specific devices be bootable, and *only* those devices. For example, if my bootorder file specifies SATA drive 3, I do not want it to try SATA drives 0, 1, and 2, nor any other HDD or floppy that it finds.
My first question is: how do I do this?
There is no current way to do this. I suppose one could code support for a "stop boot" option to the boot order file - so that if it was listed in the file the boot would stop after trying all options prior to it.
I thought to add skipboot file. If device is in skipboot file it is not considered for booting from.
If that can't be answered, can someone explain to me the relationship between the bootorder file and the BEV (Boot Execution Vector) configured in boot.c?
All possible boot options (both BEV and BCV) are assembled in a sorted list pointed to by boot.c:BootList. The bootorder file alters the default sort order of that list. During the latter parts of the POST phase, the BCVs are executed and only BEVs remain. The list of BEVs is generated from the BootList. So, in a nutshell, the bootorder file determines the order of the BEVs that SeaBIOS will attempt to boot from.
-Kevin
SeaBIOS mailing list SeaBIOS@seabios.org http://www.seabios.org/mailman/listinfo/seabios
-- Gleb.
SeaBIOS mailing list SeaBIOS@seabios.org http://www.seabios.org/mailman/listinfo/seabios
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Fred . -
Gleb Natapov -
Kevin O'Connor