[PATCH 2/2] powerpc/64s: update cpu selection options

[Segher Boessenkool]

On Wed, Sep 21, 2022 at 11:41:03AM +1000, Nicholas Piggin wrote:
> Update the 64s GENERIC_CPU option. POWER4 support has been dropped, so
> make that clear in the option name. The POWER5_CPU option is dropped
> because it's uncommon, and GENERIC_CPU covers it.
> 
> -mtune= before power8 is dropped because the minimum gcc version
> supports power8, and tuning is made consistent between big and little
> endian.
> 
> A 970 option is added for PowerPC 970 / G5 because they still have a
> user base, and -mtune=power8 does not generate good code for the 970.
> 
> This also updates the ISA versions document to add Power4/Power4+
> because I didn't realise Power4+ used 2.01.
> 
> Signed-off-by: Nicholas Piggin <npiggin at gmail.com>

Reviewed-by: Segher Boessenkool <segher at kernel.crashing.org>

Cheers,


Segher