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Date: Sun, 28 Feb 2010 22:41:37 +0200
From: Gleb Natapov <gleb@redhat.com>
Subject: Re: [Qemu-devel] SeaBIOS error with Juniper FreeBSD kernel
Message-ID: <20100228204137.GA23442@redhat.com>
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To: Kevin O'Connor <kevin@koconnor.net>
Cc: Brandon Bennett <bennetb@gmail.com>, seabios@seabios.org, qemu-devel@nongnu.org

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. =9AYou could try compiling the SeaBIOS c=
ode
> > >> (see http://seabios.org/Download ) and increasing the debugging by
> > >> modifying src/config.h. =9ASpecifically, you could increase
> > >> CONFIG_DEBUG_LEVEL, and set DEBUG_HDL_pcibios32 and DEBUG_HDL_apm to
> > >> 1. =9AAlso, you could try disabling some of the features to see if t=
hat
> > >> prevents the fault (eg, disabling CONFIG_ACPI / CONFIG_SMBIOS /
> > >> CONFIG_MPTABLE).
> > >
> >=20
> > I have narrowed it down to SMBIOS.  If I disable CONFIG_SMBIOS the
> > image boots up fine.
>=20
> Gleb, have you seen this thread?
>=20
> Some of the recent changes to smbios that look like possible culprits
> are:
>=20
> 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.
>=20
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.
>=20

--
			Gleb.