Re: [Qemu-devel] Why is SeaBIOS used with -kernel?

["Richard W.M. Jones" <rjones@redhat.com>]

On Fri, Apr 01, 2016 at 11:18:30AM +0200, Gerd Hoffmann wrote:
>   Hi,
> 
> > I wonder how we can make use of this in qemu and downstream distros?
> > Can we have a bios-min.bin which is used with -kernel boots?
> 
> We already build two seabios roms: one full featued and one slightly
> stripped down to keep it below 128k, for backward compatibility with old
> machine types.
> 
> Adding a third config for -kernel boot should be easy.  For that use
> case we can probably also turn on seabios logging to the serial console
> and drop sgabios.  We don't need input (no boot menu) and we also don't
> need to hook into int10 (no grub/ipxe using that for output).

SeaBIOS logging is slow (or more likely, serial output is slow).
And sgabios is useful for debugging.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
Fedora Windows cross-compiler. Compile Windows programs, test, and
build Windows installers. Over 100 libraries supported.
http://fedoraproject.org/wiki/MinGW