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Subject: Re: powerpc{32,64} randconfigs
To: Michael Ellerman <mpe@ellerman.id.au>,
 PowerPC <linuxppc-dev@lists.ozlabs.org>
References: <45afab41-cc5f-dffa-712a-d5fb1a9d0a23@infradead.org>
 <87tuo0az16.fsf@mpe.ellerman.id.au>
From: Randy Dunlap <rdunlap@infradead.org>
Message-ID: <4514b768-ef07-0b01-c87e-4c2d9eb95f65@infradead.org>
Date: Tue, 27 Apr 2021 16:45:19 -0700
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On 4/21/21 12:15 AM, Michael Ellerman wrote:
> Randy Dunlap <rdunlap@infradead.org> writes:
>> Hi,
>>
>> Is there a way to do this?
>>
>> $ make ARCH=powerpc randconfig # and force PPC32
> 
> Sort of:
> 
> $ KCONFIG_ALLCONFIG=arch/powerpc/configs/book3s_32.config make randconfig
> 
> But that also forces BOOK3S.
> 
>> and separately
>> $ make ARCH=powerpc randconfig # and force PPC64
> 
> No.
> 
> ...
>> OK, I have a patch that seems for work as far as setting
>> PPC32=y or PPC64=y... but it has a problem during linking
>> of vmlinux:
>>
>> crosstool/gcc-9.3.0-nolibc/powerpc-linux/bin/powerpc-linux-ld:./arch/powerpc/kernel/vmlinux.lds:6: syntax error
>>
>> and the (bad) generated vmlinux.lds file says (at line 6):
>>
>> OUTPUT_ARCH(1:common)
>>
>> while it should say:
>>
>> OUTPUT_ARCH(powerpc:common)
>>
>> Does anyone have any ideas about this problem?
> 
> I guess your patch broke something? :D
> Not sure sorry.
> 
> What about something like this?
> 
> cheers
> 
> 
> diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
> index 3212d076ac6a..712c5e8768ce 100644
> --- a/arch/powerpc/Makefile
> +++ b/arch/powerpc/Makefile
> @@ -376,6 +376,16 @@ PHONY += ppc64_book3e_allmodconfig
>  	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
>  		-f $(srctree)/Makefile allmodconfig
>  
> +PHONY += ppc32_randconfig
> +ppc32_randconfig:
> +	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \
> +		-f $(srctree)/Makefile randconfig
> +
> +PHONY += ppc64_randconfig
> +ppc64_randconfig:
> +	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \
> +		-f $(srctree)/Makefile randconfig
> +
>  define archhelp
>    @echo '* zImage          - Build default images selected by kernel config'
>    @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
> diff --git a/arch/powerpc/configs/32-bit.config b/arch/powerpc/configs/32-bit.config
> new file mode 100644
> index 000000000000..bdf833009006
> --- /dev/null
> +++ b/arch/powerpc/configs/32-bit.config
> @@ -0,0 +1 @@
> +CONFIG_PPC64=n

I used the suggested change here (above).

> diff --git a/arch/powerpc/configs/64-bit.config b/arch/powerpc/configs/64-bit.config
> new file mode 100644
> index 000000000000..0fe6406929e2
> --- /dev/null
> +++ b/arch/powerpc/configs/64-bit.config
> @@ -0,0 +1 @@
> +CONFIG_PPC64=y
> 

Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>


Please merge this. :)

thanks.
-- 
~Randy