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

[Aurelien J. <aur...@au...>]

Avi Kivity a écrit :
> Aurelien Jarno wrote:
>> Avi Kivity a écrit :
>>   
>>> Aurelien Jarno wrote:
>>>     
>>>> Hi all,
>>>>
>>>> That's not something new, but I never seen the problem mentioned here.
>>>> FreeBSD does not work on KVM, approximately since the lapic merge.
>>>>
>>>> However, that does not seem related to lapic, as using -no-kvm-irqchip
>>>> 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-i386-bootonly.iso
>>>>
>>>>   
>>>>       
>>> It complains about the RSDT checksum.  Running with -no-acpi works 
>>> around the problem (it gets to some country selection screen).  So it 
>>> looks like the ACPI tables are messed up.
>>>     
>> 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.
>>
>>   
> 
> Looks like there is a compiler problem that's interfering here.  A bios 
> compiled on one machine will boot fine on Intel, but on other machines 
> (unfortunately my work machines) will not.
> 
> There is a separate issue with -no-acpi on AMD.  Is there some version 
> where -no-acpi worked on AMD?

It was working correctly before, up to kvm version 37.

I also confirm that using -no-acpi fixes the problem. However, I have
seen strange data corruption, even on Intel.

Basically, booting a recently installed FreeBSD leads to the following
message from the bootloader: "No kernel found". And the next time, I get
from the *BIOS*: "Boot from Hard Disk failed: not a bootable disk".

Looking at the disk image, the partition table (and maybe more?) has
disappeared. This is with a raw image disk.

If I pass either -no-kvm or -no-kvm-irqchip, the problem disappear.

-- 
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