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

[Gleb Natapov <gleb@redhat.com>]

On Sun, Feb 28, 2010 at 02:39:04PM -0500, Kevin O'Connor wrote:
> 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.
> 
If there is any seabios revision that works then it is possible to
bisect to find problematic commit.

> 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.
> 

--
			Gleb.