Issues with the first PowerPC updates for the kernel 6.1

[Olof Johansson]

Hi,

On Fri, Oct 14, 2022 at 9:11 AM Christian Zigotzky
<chzigotzky at xenosoft.de> wrote:
>
> Hi All,
>
> make oldconfig has asked because of the CPU family. I choosed GENERIC for my P.A. Semi PWRficient PA6T-1682M. Is this correct? Maybe this is the problem.
>
> config GENERIC_CPU
> - bool "Generic (POWER4 and above)"
> + bool "Generic (POWER5 and PowerPC 970 and above)"
>   depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
>   select PPC_64S_HASH_MMU
>
> There isn’t a POWER4 anymore and I used it via CONFIG_GENERIC_CPU=y before.
>
> Before the first PowerPC updates:
> CONFIG_GENERIC_CPU=y
> # CONFIG_POWER5_CPU is not set
>
> Link: https://github.com/torvalds/linux/blob/master/arch/powerpc/platforms/Kconfig.cputype

I think the mistake here is that there are two GENERIC_CPUs now, and
one of them is the wrong one and overrides settings. I'm surprised
Kconfig didn't balk at it.

I have a vague memory that PA6T had a little-endian mode, but it was
never used much and I wouldn't expect it to work.


-Olof