Re: [SeaBIOS] [PATCHv2] Support for booting from virtio disks

[Gleb Natapov]

On Tue, May 11, 2010 at 10:04:25AM +0100, Stefan Hajnoczi wrote:
> > From what I can tell SeaBIOS is reading CMOS_BIOS_BOOTFLAG1 and
>
> CMOS_BIOS_BOOTFLAG2 from non-volatile memory.  The values index into
> bev[], which contains IPL entries (the drives).
>
> Is the order of bev[] entries well-defined?  Is there a way for QEMU
> command-line to know that the first virtio-blk device corresponds to x
> and the IDE CD-ROM corresponds to y?

The order of bev[] is the order in which bootable devices where discovered
and can change from one version of Seabios to another.