Re: [Qemu-devel] SeaBIOS error with Juniper FreeBSD kernel

[Kevin O'Connor <kevin@koconnor.net>]

On Sun, Feb 21, 2010 at 04:18:38PM -0700, Brandon Bennett wrote:
> > On Sat, Feb 20, 2010 at 9:05 PM, Kevin O'Connor <kevin@koconnor.net> wrote:
> >> Should a kernel fail during boot, I'd suspect it doesn't like one of
> >> the apm/pcibios callbacks, or it doesn't like one of the
> >> smbios/mptable/acpi tables.  You could try compiling the SeaBIOS code
> >> (see http://seabios.org/Download ) and increasing the debugging by
> >> modifying src/config.h.  Specifically, you could increase
> >> CONFIG_DEBUG_LEVEL, and set DEBUG_HDL_pcibios32 and DEBUG_HDL_apm to
> >> 1.  Also, you could try disabling some of the features to see if that
> >> prevents the fault (eg, disabling CONFIG_ACPI / CONFIG_SMBIOS /
> >> CONFIG_MPTABLE).
> >
> 
> I have narrowed it down to SMBIOS.  If I disable CONFIG_SMBIOS the
> image boots up fine.

Gleb, have you seen this thread?

Some of the recent changes to smbios that look like possible culprits
are:

Make SMBIOS table pass MS SVVP test
Use MaxCountCPUs during building of per cpu tables.
Add malloc_high/fseg() and rework bios table creation to use them.

There were other changes, but the comments indicate they were only
ports of changes already in bochs.  I suppose it's also possible the
lack of smbios is turning off some other feature in the guest (eg,
acpi) that's the real culprit.

-Kevin