[Qemu-devel] Re: [PATCH 3/7] Add mp_state to PPC CPU struct

[Jan Kiszka <jan.kiszka@siemens.com>]

Hollis Blanchard wrote:
> On Wed, 2009-07-22 at 11:22 -0500, Anthony Liguori wrote:
>> Hollis Blanchard wrote:
>>> On Wed, 2009-07-22 at 10:34 -0500, Anthony Liguori wrote:
>>>   
>>>> Alexander Graf wrote:
>>>>     
>>>>> Some generic code tries to access env->mp_state. Let's just make
>>>>> it happy and provide it.
>>>>>
>>>>> Signed-off-by: Alexander Graf <agraf@suse.de>
>>>>>   
>>>>>       
>>>> Or we can move that code from kvm-all.c to target-i386/kvm.c where it 
>>>> belongs :-)
>>>>     
>>> Common code uses mp_state, and i386 is the only thing calling that code.
>>> However, the ioctl used by that code is valid for all architectures; it
>>> will just return -EINVAL. Someday we might need it in common code, but
>>> then again it's not even clear to me it will be useful outside of x86.
>>>
>>> I'm fine with moving it too, as long as it's also renamed at the same
>>> time. :)
>>>   
>> Why is it a common ioctl instead of an arch specific ioctl?
> 
> I can only speculate: Marcelo probably thought other architectures may
> have something useful to put there.
> 

mp_state is also used by (yet unsupported) ia64. So I think it's better
to keep the related bits in the arch-independent part.

Jan

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