[PATCH 1/2] powerpc: Add ppc32_allmodconfig defconfig target

[Randy Dunlap]

On 07/09/2018 07:24 AM, Michael Ellerman wrote:
> Because the allmodconfig logic just sets every symbol to M or Y, it
> has the effect of always generating a 64-bit config, because
> CONFIG_PPC64 becomes Y.
> 
> So to make it easier for folks to test 32-bit code, provide a phony
> defconfig target that generates a 32-bit allmodconfig.
> 
> The 32-bit port has several mutually exclusive CPU types, we choose
> the Book3S variants as that's what the help text in Kconfig says is
> most common.
> 
> Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>

Hi Michael,

ppc32_allmodconfig sets CONFIG_ISA=y (and other related symbols) and
CONFIG_PPC_CHRP=y.  But my builds are failing because they are missing
the functions isa_bus_to_virt() and isa_virt_to_bus().

Any ideas?

Thanks.

> ---
>  arch/powerpc/Makefile                 | 5 +++++
>  arch/powerpc/configs/book3s_32.config | 2 ++
>  2 files changed, 7 insertions(+)
>  create mode 100644 arch/powerpc/configs/book3s_32.config
> 
> diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
> index 2ea575cb3401..2556c2182789 100644
> --- a/arch/powerpc/Makefile
> +++ b/arch/powerpc/Makefile
> @@ -354,6 +354,11 @@ mpc86xx_smp_defconfig:
>  	$(call merge_into_defconfig,mpc86xx_basic_defconfig,\
>  		86xx-smp 86xx-hw fsl-emb-nonhw)
>  
> +PHONY += ppc32_allmodconfig
> +ppc32_allmodconfig:
> +	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
> +		-f $(srctree)/Makefile allmodconfig
> +
>  define archhelp
>    @echo '* zImage          - Build default images selected by kernel config'
>    @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
> diff --git a/arch/powerpc/configs/book3s_32.config b/arch/powerpc/configs/book3s_32.config
> new file mode 100644
> index 000000000000..8721eb7b1294
> --- /dev/null
> +++ b/arch/powerpc/configs/book3s_32.config
> @@ -0,0 +1,2 @@
> +CONFIG_PPC64=n
> +CONFIG_PPC_BOOK3S_32=y
> 


-- 
~Randy