[PATCH V2] powerpc/kernel: Add 'ibm,thread-groups' property for CPU allocation

[Michael Bringmann]

You are correct.  I found a problem with multiple cores last week,
and I have a new patch in testing.  I will resubmit it after more
testing.

Sorry for the inconvenience.

Michael

On 01/27/2018 03:52 AM, Michael Ellerman wrote:
> Michael Bringmann <mwb at linux.vnet.ibm.com> writes:
> 
>> diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
>> index b15bae2..0a49231 100644
>> --- a/arch/powerpc/kernel/prom.c
>> +++ b/arch/powerpc/kernel/prom.c
>> @@ -303,6 +306,71 @@ static void __init check_cpu_feature_properties(unsigned long node)
>>  	}
>>  }
>>  
>> +static void __init early_init_setup_thread_group_mask(unsigned long node,
>> +						cpumask_t *thread_group_mask)
>> +{
>> +	const __be32 *thrgrp;
>> +	int len, rc = 0;
>> +	u32 cc_type = 0, no_split = 0, thr_per_split = 0;
>> +	int j, k;
>> +
>> +	cpumask_clear(thread_group_mask);
>> +
>> +	thrgrp = of_get_flat_dt_prop(node, "ibm,thread-groups", &len);
>> +	if (!thrgrp)
>> +		return;
> 
> This breaks booting on all my systems.
> 
> cheers
> 

-- 
Michael W. Bringmann
Linux Technology Center
IBM Corporation
Tie-Line  363-5196
External: (512) 286-5196
Cell:       (512) 466-0650
mwb at linux.vnet.ibm.com