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 com
> Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
Hi Michael,
Sorry for the delay. I was traveling (out in the boonies).
I'm trying to use 'make ppc32_allmodconfig'. Cross-building on x86_64
with crosstools from kernel.org. (gcc 8.1.0)
I'm getting build errors. Looks like it's missing a header file or 3.
I looked into that but it's a long and twisty maze of passages.
Any ideas?
CC arch/powerpc/mm/dump_linuxpagetables.o
In file included from ../arch/powerpc/include/asm/book3s/pgtable.h:8,
from ../arch/powerpc/include/asm/pgtable.h:18,
from ../include/linux/hugetlb.h:12,
from ../arch/powerpc/mm/dump_linuxpagetables.c:19:
../arch/powerpc/mm/dump_linuxpagetables.c: In function 'populate_markers':
../arch/powerpc/include/asm/book3s/32/pgtable.h:53:19: error: 'PKMAP_BASE'
undeclared (first use in this function); did you mean 'AT_BASE'?
#define KVIRT_TOP PKMAP_BASE
^~~~~~~~~~
../arch/powerpc/include/asm/book3s/32/pgtable.h:64:23: note: in expansion of
macro 'KVIRT_TOP'
#define IOREMAP_TOP ((KVIRT_TOP - CONFIG_CONSISTENT_SIZE) & PAGE_MASK)
^~~~~~~~~
../arch/powerpc/mm/dump_linuxpagetables.c:456:39: note: in expansion of macro
'IOREMAP_TOP'
address_markers[i++].start_address = IOREMAP_TOP;
^~~~~~~~~~~
../arch/powerpc/include/asm/book3s/32/pgtable.h:53:19: note: each undeclared
identifier is reported only once for each function it appears in
#define KVIRT_TOP PKMAP_BASE
^~~~~~~~~~
../arch/powerpc/include/asm/book3s/32/pgtable.h:64:23: note: in expansion of
macro 'KVIRT_TOP'
#define IOREMAP_TOP ((KVIRT_TOP - CONFIG_CONSISTENT_SIZE) & PAGE_MASK)
^~~~~~~~~
../arch/powerpc/mm/dump_linuxpagetables.c:456:39: note: in expansion of macro
'IOREMAP_TOP'
address_markers[i++].start_address = IOREMAP_TOP;
^~~~~~~~~~~
../arch/powerpc/mm/dump_linuxpagetables.c:464:39: error: implicit declaration
of function 'PKMAP_ADDR'; did you mean 'PCI_IO_ADDR'?
[-Werror=implicit-function-declaration]
address_markers[i++].start_address = PKMAP_ADDR(LAST_PKMAP);
^~~~~~~~~~
PCI_IO_ADDR
../arch/powerpc/mm/dump_linuxpagetables.c:464:50: error: 'LAST_PKMAP'
undeclared (first use in this function); did you mean 'LIST_HEAD'?
address_markers[i++].start_address = PKMAP_ADDR(LAST_PKMAP);
^~~~~~~~~~
LIST_HEAD
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
