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authorQing Zhang <zhangqing@loongson.cn>2022-12-10 15:40:15 +0100
committerHuacai Chen <chenhuacai@loongson.cn>2022-12-14 01:41:53 +0100
commita0a458fbd6f2317832e2d74acdbfa2451c3f4b8f (patch)
treee2709583066ae220569a23fd8e623d44eb3fac5f /arch/loongarch
parentLoongArch/ftrace: Add basic support (diff)
downloadlinux-a0a458fbd6f2317832e2d74acdbfa2451c3f4b8f.tar.xz
linux-a0a458fbd6f2317832e2d74acdbfa2451c3f4b8f.zip
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/Kconfig2
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