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| author | Qing Zhang <zhangqing@loongson.cn> | 2022-12-10 22:40:15 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-12-14 08:41:53 +0800 |
| commit | a0a458fbd6f2317832e2d74acdbfa2451c3f4b8f (patch) | |
| tree | e2709583066ae220569a23fd8e623d44eb3fac5f /arch/loongarch | |
| parent | dbe3ba3018ec1fc53ea0d0adf0f687f5d438039d (diff) | |
| download | linux-a0a458fbd6f2317832e2d74acdbfa2451c3f4b8f.tar.bz2 | |
LoongArch/ftrace: Add recordmcount support
Recordmcount utility under scripts is run, after compiling each object,
to find out all the locations of calling _mcount() and put them into
specific seciton named __mcount_loc.
Then the linker collects all such information into a table in the kernel
image (between __start_mcount_loc and __stop_mcount_loc) for later use
by ftrace.
This patch adds LoongArch specific definitions to identify such locations.
And on LoongArch, only the C version is used to build the kernel now that
CONFIG_HAVE_C_RECORDMCOUNT is on.
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch')
| -rw-r--r-- | arch/loongarch/Kconfig | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 72a41e08f9f4..8b81cf9a6503 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -85,11 +85,13 @@ config LOONGARCH select HAVE_ARCH_TRANSPARENT_HUGEPAGE select HAVE_ASM_MODVERSIONS select HAVE_CONTEXT_TRACKING_USER + select HAVE_C_RECORDMCOUNT select HAVE_DEBUG_STACKOVERFLOW select HAVE_DMA_CONTIGUOUS select HAVE_EBPF_JIT select HAVE_EXIT_THREAD select HAVE_FAST_GUP + select HAVE_FTRACE_MCOUNT_RECORD select HAVE_FUNCTION_GRAPH_TRACER select HAVE_FUNCTION_TRACER select HAVE_GENERIC_VDSO |