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| author | Nicholas Piggin <npiggin@gmail.com> | 2023-06-06 19:38:31 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-06-14 12:46:42 +1000 |
| commit | aec0ba7472a7b0c1c293932e7978197f1489a332 (patch) | |
| tree | 27ba6831649a3ce13c23e269f0b8b382cfdecee4 /arch/powerpc/Kconfig | |
| parent | 8c5fa3b5c4df3d071dab42b04b971df370d99354 (diff) | |
powerpc/64: Use -mprofile-kernel for big endian ELFv2 kernels
-mprofile-kernel is an optimised calling convention for mcount that
Linux has only implemented with the ELFv2 ABI, so it was disabled for
big endian kernels. However it does work with ELFv2 big endian, so let's
allow that if the compiler supports it.
Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Suggested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230606093832.199712-4-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/Kconfig')
| -rw-r--r-- | arch/powerpc/Kconfig | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 78be2cd26e7a..dea8e0c7f7e3 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -547,8 +547,9 @@ config LD_HEAD_STUB_CATCH If unsure, say "N". config MPROFILE_KERNEL - depends on PPC64 && CPU_LITTLE_ENDIAN && FUNCTION_TRACER - def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__) + depends on PPC64_ELF_ABI_V2 && FUNCTION_TRACER + def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -mlittle-endian) if CPU_LITTLE_ENDIAN + def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -mbig-endian) if CPU_BIG_ENDIAN config HOTPLUG_CPU bool "Support for enabling/disabling CPUs" |