[PATCH 0/4] powerpc/64: ELFv2 conversion

[Christophe Leroy]

Le 05/05/2023 à 09:18, Nicholas Piggin a écrit :
> This series has the steps to remove ELFv1 from the kernel build.
> Patch 1 is a build fix, 2 defaults everything to ELFv2, 3 is
> really a separate issue that concerns userspace. 4 removes v1
> support.

I see CONFIG_MPROFILE_KERNEL is restricted to LITTLE_ENDIAN. Is that 
correct ? Don't we have mprofile_kernel as well on BIG ENDIAN once 
switched to ABI v2 ? If so, can we drop the -pg based profiling 
completely, or is CLANG still not supporting mprofile_kernel ?

Christophe

> 
> Would like to try getting patch 1 in as a fix, then 2,3 merged in
> the next merge window.
> 
> Thanks,
> Nick
> 
> Nicholas Piggin (4):
>    powerpc/64: Force ELFv2 when building with LLVM linker
>    powerpc/64: Make ELFv2 the default for big-endian builds
>    powerpc/64s: Remove support for ELFv1 little endian userspace
>    powerpc/64: Remove support for kernel's built with ELFv1 ABI
> 
>   arch/powerpc/Kconfig                     | 21 ------
>   arch/powerpc/Makefile                    | 15 +----
>   arch/powerpc/boot/Makefile               |  4 +-
>   arch/powerpc/include/asm/code-patching.h | 36 ++--------
>   arch/powerpc/include/asm/elf.h           |  6 ++
>   arch/powerpc/include/asm/kfence.h        |  4 --
>   arch/powerpc/include/asm/linkage.h       |  9 ---
>   arch/powerpc/include/asm/module.h        |  3 -
>   arch/powerpc/include/asm/ppc_asm.h       | 38 +----------
>   arch/powerpc/include/asm/ptrace.h        | 17 +----
>   arch/powerpc/include/asm/sections.h      |  4 --
>   arch/powerpc/include/asm/thread_info.h   |  6 +-
>   arch/powerpc/kernel/exceptions-64s.S     |  2 +-
>   arch/powerpc/kernel/fadump.c             |  6 +-
>   arch/powerpc/kernel/head_64.S            |  5 +-
>   arch/powerpc/kernel/interrupt_64.S       |  4 --
>   arch/powerpc/kernel/kprobes.c            | 39 +----------
>   arch/powerpc/kernel/misc_64.S            |  4 --
>   arch/powerpc/kernel/module.c             |  8 ---
>   arch/powerpc/kernel/module_64.c          | 84 ++++--------------------
>   arch/powerpc/kernel/trace/ftrace.c       | 10 ---
>   arch/powerpc/kernel/vdso/Makefile        |  2 +-
>   arch/powerpc/kernel/vdso/gettimeofday.S  |  2 +-
>   arch/powerpc/kernel/vmlinux.lds.S        |  8 ---
>   arch/powerpc/kvm/book3s_hv_rmhandlers.S  | 36 +++++-----
>   arch/powerpc/kvm/book3s_interrupts.S     | 14 ++--
>   arch/powerpc/kvm/book3s_rmhandlers.S     | 12 +---
>   arch/powerpc/net/bpf_jit.h               |  6 --
>   arch/powerpc/net/bpf_jit_comp.c          | 14 ++--
>   arch/powerpc/net/bpf_jit_comp64.c        | 13 ++--
>   arch/powerpc/platforms/Kconfig.cputype   |  6 --
>   drivers/crypto/vmx/Makefile              |  4 --
>   kernel/extable.c                         |  2 +-
>   kernel/trace/ftrace.c                    | 12 ----
>   34 files changed, 79 insertions(+), 377 deletions(-)
>