riscv/ftrace: Add ARCH_SUPPORTS_FTRACE_OPS support
Cc: Greentime Hu <greentime@andestech.com>
Signed-off-by: Alan Kao <alankao@andestech.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
diff --git a/arch/riscv/include/asm/ftrace.h b/arch/riscv/include/asm/ftrace.h
index 078743a..fedadc4 100644
--- a/arch/riscv/include/asm/ftrace.h
+++ b/arch/riscv/include/asm/ftrace.h
@@ -9,6 +9,7 @@
#define HAVE_FUNCTION_GRAPH_FP_TEST
#endif
+#define ARCH_SUPPORTS_FTRACE_OPS 1
#ifndef __ASSEMBLY__
void _mcount(void);
static inline unsigned long ftrace_call_adjust(unsigned long addr)
diff --git a/arch/riscv/kernel/mcount-dyn.S b/arch/riscv/kernel/mcount-dyn.S
index 739e07a..6bbc3f8 100644
--- a/arch/riscv/kernel/mcount-dyn.S
+++ b/arch/riscv/kernel/mcount-dyn.S
@@ -74,9 +74,12 @@
/*
* a0: the address in the caller when calling ftrace_caller
* a1: the caller's return address
+ * a2: the address of global variable function_trace_op
*/
ld a1, -8(s0)
addi a0, ra, -MCOUNT_INSN_SIZE
+ la t5, function_trace_op
+ ld a2, 0(t5)
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
/*
