Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> writes:

Hello Mahesh,

> POWER9P PVR bits are same as that of POWER9. Hence mask off only the
> relevant bits for the major revision similar to POWER9.
>
> Without this patch the cpuinfo output shows 17.0 as revision:
>
> $ cat /proc/cpuinfo
> processor     : 0
> cpu           : POWER9P, altivec supported
> clock         : 2950.000000MHz
> revision      : 17.0 (pvr 004f 1100)
>
> With this change it reflects the correct revision:
>
> $ cat /proc/cpuinfo
> processor     : 0
> cpu           : POWER9P, altivec supported
> clock         : 2633.000000MHz
> revision      : 1.0 (pvr 004f 1100)
>
> Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
> ---
>  arch/powerpc/kernel/setup-common.c |    1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
> index 488f1eecc0de..37342ec42cb3 100644
> --- a/arch/powerpc/kernel/setup-common.c
> +++ b/arch/powerpc/kernel/setup-common.c
> @@ -315,6 +315,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
>                               min = pvr & 0xFF;
>                               break;
>                       case 0x004e: /* POWER9 bits 12-15 give chip type */
> +                     case 0x004f: /* POWER9P bits 12-15 give chip type */
>                               maj = (pvr >> 8) & 0x0F;
>                               min = pvr & 0xFF;
>                               break;

Seems fine to me.

FWIW:
Reviwed-by: Leonardo Bras <leonardo@linux.ibm.com>