Re: [SeaBIOS] IO APIC emulation failure with qemu-kvm

[Avi Kivity]

On 02/04/2011 03:58 PM, Jan Kiszka wrote:
> > when i run my kernel image with qemu-kvm it gives emulation error failure
> >  trying to execute the code outside ROM or RAM at fec00000(IO APIC base address)
> >  but the same code runs fine with qemu. can anyone please point me
> >  where might be the problem or how to find out this one?

Please post the error message.
> Start with capturing the activity of you guest via ftrace, enabling all
> kvm:* events. You may also try to attach gdb to qemu and analyze the
> different code path in both versions (specifically if you have debugging
> symbols for your guest).

The easy way to do that is trace-cmd (http://lwn.net/Articles/341902/):

$ trace-cmd record -e kvm -b 20000
...
^C
$ trace-cmd report