[FSL P50x0] lscpu reports wrong values since the RC1 of kernel 5.13

[Christian Zigotzky]

> On 26. Aug 2021, at 05:43, Srikar Dronamraju <srikar at linux.vnet.ibm.com> wrote:
> 
> * Christian Zigotzky <chzigotzky at xenosoft.de> [2021-08-16 14:29:21]:
> 
> 
> Hi Christian,
> 
>> I tested the RC6 of kernel 5.14 today and unfortunately the issue still
>> exists. We have figured out that only P5040 SoCs are affected. [1]
>> P5020 SoCs display the correct values.
>> Please check the CPU changes in the PowerPC updates 5.13-1 and 5.13-2.
>> 
> 
> Thanks for reporting the issue.
> Would it be possible to try
> https://lore.kernel.org/linuxppc-dev/20210821092419.167454-3-srikar@linux.vnet.ibm.com/t/#u

Hi Srikar,

This patch works! Thanks a lot!

Cheers,
Christian

> 
> If the above patch is not helping, then can you please collect the output of
> 
> cat /sys/devices/system/cpu/cpu*/topology/core_siblings
> 
> Were all the CPUs online at the time of boot?
> Did we do any CPU online/offline operations post boot?
> 
> If we did CPU online/offline, can you capture the output just after the
> boot along with lscpu output..
> 
> Since this is being seen on few SOCs, can you summarize the difference
> between P5040 and P5020.
>> 
>> [1] https://forum.hyperion-entertainment.com/viewtopic.php?p=53775#p53775
>> 
>> 
>>> On 09 August 2021 um 02:37 pm, Christian Zigotzky wrote:
>>> Hi All,
>>> 
>>> Lscpu reports wrong values [1] since the RC1 of kernel 5.13 on my FSL
>>> P5040 Cyrus+ board (A-EON AmigaOne X5000). [2]
>>> The differences are:
>>> 
>>> Since the RC1 of kernel 5.13 (wrong values):
>>> 
>>> Core(s) per socket: 1
>>> Socket(s): 3
>>> 
> 
> I know that the socket count was off by 1, but I cant explain how its off by
> 2 here.
> 
>>> Before (correct values):
>>> 
>>> Core(s) per socket: 4
>>> Socket(s): 1
>>> 
> 
> -- 
> Thanks and Regards
> Srikar Dronamraju