Re: [Qemu-ppc] [Qemu-devel] emulate powerpc(mpc8544ds) on x86 architecture

[Alexander Graf]

On 20.02.2013, at 19:46, Alexander Graf wrote:

> 
> On 20.02.2013, at 19:30, Scott Wood wrote:
> 
>> On 02/20/2013 08:46:52 AM, Alexander Graf wrote:
>>> On 20.02.2013, at 15:07, Andreas Färber wrote:
>>>> Hi,
>>>> 
>>>> Am 20.02.2013 10:22, schrieb Shi Rong:
>>>>> I want to emulate powerpc(mpc8544ds) on x86 architecture, is anybody
>>>>> succeed in it?
>>>> 
>>>> If you CC Power Architecture questions to qemu-ppc, you have higher
>>>> chances of getting replies from the experts.
>>>> 
>>>>> My working step:
>>>>> about qemu:
>>>>> ./configure --cpu=ppc --target-list=ppc-softmmu --enable-fdt
>>>>> --enable-kvm --enable-tcg-interpreter --enable-linux-user
>>>>> --prefix=/home/shir/install/qemu/
>>>>> make
>>>>> make install
>>>> 
>>>> --cpu=ppc is bogus, just drop it.
>>>> Also --enable-tcg-interpreter is unnecessary on x86.
>>> Also no need for enable-kvm, as you're running on x86. KVM only helps for 
>>> compatible CPUs (ppc on ppc for example).
>>>> 
>>>>> but everytime I start my qemu-system-ppc,
>>>>> qemu-system-ppc -M mpc8544ds -kernel uImage -append "root=/dev/ram
>>>>> rdinit=/linuxrc" -initrd initrd -nographic
>>>>> I get this error :
>>>>> "KVM: Couldn't find level irq capability. Expect the VM to stall at times
>>>>> kvm_init_vcpu failed: Cannot allocate memory"
>>>> 
>>>> What kernel are you using? Sounds like it is lacking some required feature.
>>> This is probably because you compiled with -cpu=ppc. Without, KVM shouldn't 
>>> get detected and all is well.
>> 
>> Still, why is it trying to use KVM without the user explicitly asking for it 
>> (at runtime, not in the build)?  What if I want to emulate an mpc8544 on a 
>> powermac?
> 
> Because we don't have a way to match compatibility yet :).

Oh - I'm starting to understand what you're trying to say. Good question. It 
really shouldn't. This source is probably not qemu.git :).


Alex