From: Christophe Leroy
> Sent: 20 January 2021 07:49
>
> STDBINUTILS is just a toggle to allow 256k page size
> to appear in the possible page sizes list for the 44x.
>
> Make 256k page size appear all the time with an
> explicit warning on binutils, and remove this unneccessary
> STDBINUTILS config option.
>
> Signed-off-by: Christophe Leroy
> ---
> arch/powerpc/Kconfig | 27 +++
> 1 file changed, 7 insertions(+), 20 deletions(-)
>
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index a685e42d3993..3e29995540a7 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -720,18 +720,6 @@ config ARCH_MEMORY_PROBE
> def_bool y
> depends on MEMORY_HOTPLUG
>
> -config STDBINUTILS
> - bool "Using standard binutils settings"
> - depends on 44x
> - default y
> - help
> - Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
> - Note, that kernel will be able to run only those applications,
> - which had been compiled using binutils later than 2.17.50.0.3 with
> - '-zmax-page-size' set to 256K (the default is 64K). Or, if using
> - the older binutils, you can patch them with a trivial patch, which
> - changes the ELF_MAXPAGESIZE definition from 0x1 to 0x4.
> -
> choice
> prompt "Page size"
> default PPC_4K_PAGES
> @@ -771,17 +759,16 @@ config PPC_64K_PAGES
> select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
>
> config PPC_256K_PAGES
> - bool "256k page size"
> - depends on 44x && !STDBINUTILS && !PPC_47x
> + bool "256k page size (Requires non-standard binutils settings)"
> + depends on 44x && !PPC_47x
> help
> Make the page size 256k.
>
> - As the ELF standard only requires alignment to support page
> - sizes up to 64k, you will need to compile all of your user
> - space applications with a non-standard binutils settings
> - (see the STDBINUTILS description for details).
> -
> - Say N unless you know what you are doing.
> + That kernel will be able to run only those applications,
> + which had been compiled using binutils later than 2.17.50.0.3 with
> + '-zmax-page-size' set to 256K (the default is 64K). Or, if using
> + the older binutils, you can patch them with a trivial patch, which
> + changes the ELF_MAXPAGESIZE definition from 0x1 to 0x4.
The kernel will only be able to run applications that have been
compiled with '-zmax-page-size' set to 256K (the default is 64K)
using binutils later than 2.17.50.0.3, or by patching the
ELF_MAXPAGESIZE definition from 0x1 to 0x4 in older versions.
>
> endchoice
>
> --
> 2.25.0
-
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