[SeaBIOS] [PATCH 2/2] accept MADT over fw_cfg

[Michael S. Tsirkin]

On Thu, Mar 21, 2013 at 12:52:17PM +0000, David Woodhouse wrote:
> On Thu, 2013-03-21 at 13:49 +0100, Gerd Hoffmann wrote:
> > >>> How about we don't bother to determine this at runtime at all?
> > >>
> > >> Because it will be a PITA for testers + developers to figure the correct
> > >> .config switches of the day during the transition phase?
> > > 
> > > Why is it a PITA?  Are you developing QEMU?  Just use the makefile from
> > > roms/config.seabios Are you using QEMU binary?  Just use the defaults.
> > 
> > SeaBIOS binaries are running on a wide range of qemu versions today.
> > Changing that is a big deal.  People are not used to it, and even when
> > writing it to the README people will stumble over it.  It also is pretty
> > inconvenient in a number of cases.  For starters the usual way to
> > package seabios and qemu in distros is to have separate packages ...
> 
> I agree that for the foreseeable future, we should be able to build
> SeaBIOS such that it can cope with old versions of Qemu that *don't*
> provide ACPI tables. 
> 
> And of course we should make it cope with new versions of Qemu that
> *do*.
> 
> But I'm not sure I see any point in doing it table-by-table. Surely it
> can be all or nothing?
> 
> -- 
> dwmw2

If someone wants to add a feature where same bios works with
old and new qemu, I don't see a problem here.
I also don't see why we should not allow building a
minimal bios that only works with the new specific qemu.
This is the only option that distros will actually ship,
so runtime detection is a developer's tool really,
seems quite sane to allow saving some resources
by removing it.

No?

-- 
MST