Yes, you are right, identity_base is 0xfffbc000 in my case and
KVM_CAP_SET_IDENTITY_MAP_ADDR is not defined. So,
as I understand, the problem is that BIOS size is too large
and I have too old KVM module.
Also I'm not sure if I can use KVM on 32-bit host for
emulating 64-bit guests.

Best regards,
Artyom.

Jordan Justen wrote:
> On Sun, Mar 6, 2011 at 13:26, vagran <vagran.ast@gmail.com> wrote:
>   
>>> Can you try disabling KVM?
>>>       
>> Yes, it helped. Problem exists only when using KVM. Thanks.
>>     
>
> One thing I suspect is that the kernel side of kvm had an issue around
> this time (Ubuntu 9.10) with a bios.bin larger than 256kb.
>
> With qemu 0.14.0, you could investigate what value is being used for
> identity_base in target-i386/kvm.c:kvm_arch_init.
> (Notice it will be a lower value if KVM_CAP_SET_IDENTITY_MAP_ADDR is
> defined, and this will allow for a larger bios.bin.)
>
> I think I was able to use OVMF X64 with kvm on Ubuntu 10.04, but I
> don't have a system set up right now to verify this.  I am able to use
> OVMF X64 with kvm on Ubuntu 10.10.
>
> -Jordan
>