Re: [Qemu-devel] [PATCH 18/19] target-ppc: Enhance the CPU node labels for the guest device tree for pseries.

[Prerna Saxena]

On 07/08/2013 02:32 PM, Andreas Färber wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Am 08.07.2013 03:09, schrieb David Gibson:
>> On Sat, Jul 06, 2013 at 11:54:15PM +1000, Alexey Kardashevskiy
>> wrote:
>>> @@ -1342,6 +1346,13 @@ static void
>>> ppc_spapr_init(QEMUMachineInitArgs *args) 
>>> register_savevm_live(NULL, "spapr/htab", -1, 1, 
>>> &savevm_htab_handlers, spapr);
>>>
>>> +    /* Ensure that cpu_model is correctly reflected for a KVM
>>> guest */ +    if (kvm_enabled() && !strcmp(cpu_model, "host")) { 
>>> +        asm ("mfpvr %0" +            : "=r"(pvr)); +
>>> cpu_model = ppc_cpu_alias_by_pvr(pvr);
>>
>> This needs to be protected by an ifdef CONFIG_KVM or similar.  If
>> the compiler optimization level is turned down, so that it doesn't 
>> recognize that the kvm_enabled() is always false, then this could 
>> attempt to compile the ppc asm instructions on an x86 (or
>> whatever) host.
> 
> This hunk can be completely replaced by QOM mechanisms - just didn't
> get to replying yet...
> 

Hi Andreas,
Sorry I already sent out a v2, and only then saw your message. Could you
pls explain how I could use QOM to replace this code block ?

Regards,
-- 
Prerna Saxena

Linux Technology Centre,
IBM Systems and Technology Lab,
Bangalore, India