Re: [kvm-devel] FreeBSD image hangs during boot

[Laurent V. <Lau...@bu...>]

Avi Kivity wrote:
> Aurelien Jarno wrote:
>> Avi Kivity a =E9crit :
>>  =20
>>> Aurelien Jarno wrote:
>>>    =20
>>>> Hi all,
>>>>
>>>> That's not something new, but I never seen the problem mentioned her=
e.
>>>> FreeBSD does not work on KVM, approximately since the lapic merge.
>>>>
>>>> However, that does not seem related to lapic, as using -no-kvm-irqch=
ip
>>>> does not help. With -no-kvm I get a page fault in kernel mode, while=
 the
>>>> normal QEMU (0.9.0 or CVS) does not have this problem.
>>>>
>>>> This can be easily reproduced with the latest installation CD:
>>>> ftp://ftp.freebsd.org/pub/FreeBSD/ISO-IMAGES-i386/6.2/6.2-RELEASE-i3=
86-bootonly.iso
>>>>
>>>>  =20
>>>>      =20
>>> It complains about the RSDT checksum.  Running with -no-acpi works=20
>>> around the problem (it gets to some country selection screen).  So it=
=20
>>> looks like the ACPI tables are messed up.
>>>    =20
>> The RSDT checksum problem is not new, but it was harmless on previous
>> versions (like kvm-37).
>>
>> Using -no-acpi, I am able to boot the machine with -no-kvm, but the
>> guest still hang with -no-acpi and with -no-kvm-irqchip or lapic
>> enabled. At least on AMD64, I haven't tested yet on an Intel machine.
>>
>>  =20
>=20
> Looks like there is a compiler problem that's interfering here.  A bios=
=20
> compiled on one machine will boot fine on Intel, but on other machines =

> (unfortunately my work machines) will not.
>=20
> There is a separate issue with -no-acpi on AMD.  Is there some version =

> where -no-acpi worked on AMD?
>=20

I've found the first bios that is not working on my machine (intel) is at=
:

commit 41675d73b654bd926670d69551a0903b8a9f7fd5
Author: Avi Kivity <av...@qu...>
Date:   Thu Sep 20 18:45:24 2007 +0200

    kvm: bios: advertise pci irqs as active high

    now that kvm emulates the ioapic polarity correctly, we must describe=

    the polarity correctly in the acpi tables.  otherwise pci interrupts =
won't
    be delivered correctly.

    Signed-off-by: Avi Kivity <av...@qu...>

Reverting this commit from master allows to boot again freebsd.

It works fine with and without "-no-kvm-irqchip".

But it doesn't allow to make working debian-31r0a-amd64 install CD.

Laurent
--=20
------------- Lau...@bu...  --------------
          "Software is hard" - Donald Knuth