Re: [RFC PATCH 5/6] powerpc/microwatt: select POWER9_CPU

[Christophe Leroy <christophe.leroy@csgroup.eu>]

Le 27/08/2021 à 18:34, Nicholas Piggin a écrit :
> Microwatt implements a subset of ISA v3.0 which is equivalent to
> the POWER9_CPU selection.
> 
> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> ---
>   arch/powerpc/configs/microwatt_defconfig | 1 +
>   arch/powerpc/platforms/microwatt/Kconfig | 1 +
>   2 files changed, 2 insertions(+)
> 
> diff --git a/arch/powerpc/configs/microwatt_defconfig b/arch/powerpc/configs/microwatt_defconfig
> index a08b739123da..bf5f2e5905eb 100644
> --- a/arch/powerpc/configs/microwatt_defconfig
> +++ b/arch/powerpc/configs/microwatt_defconfig
> @@ -14,6 +14,7 @@ CONFIG_EMBEDDED=y
>   # CONFIG_COMPAT_BRK is not set
>   # CONFIG_SLAB_MERGE_DEFAULT is not set
>   CONFIG_PPC64=y
> +CONFIG_POWER9_CPU=y

That shouldn't be needed in the defconfig because you select it below. You can use make 
savedefconfig to confirm.

>   # CONFIG_PPC_KUEP is not set
>   # CONFIG_PPC_KUAP is not set
>   CONFIG_CPU_LITTLE_ENDIAN=y
> diff --git a/arch/powerpc/platforms/microwatt/Kconfig b/arch/powerpc/platforms/microwatt/Kconfig
> index 823192e9d38a..e0ff2cfc1ca0 100644
> --- a/arch/powerpc/platforms/microwatt/Kconfig
> +++ b/arch/powerpc/platforms/microwatt/Kconfig
> @@ -2,6 +2,7 @@
>   config PPC_MICROWATT
>   	depends on PPC_BOOK3S_64 && !SMP
>   	bool "Microwatt SoC platform"
> +	select POWER9_CPU
>   	select PPC_XICS
>   	select PPC_ICS_NATIVE
>   	select PPC_ICP_NATIVE
>