LoongArch: Add larch_insn_gen_break() to generate break insns

There exist various break insns such as BRK_KPROBE_BP, BRK_KPROBE_SSTEPBP,
BRK_UPROBE_BP and BRK_UPROBE_XOLBP, add larch_insn_gen_break() to generate
break insns simpler, this is preparation for later patch.

Tested-by: Jeff Xie <xiehuan09@gmail.com>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

1 files changed, 14 insertions, 0 deletions

diff --git a/arch/loongarch/kernel/inst.c b/arch/loongarch/kernel/inst.c
index a3169cf1cc31..3050329556d1 100644
--- a/arch/loongarch/kernel/inst.c
+++ b/arch/loongarch/kernel/inst.c
@@ -253,6 +253,20 @@ u32 larch_insn_gen_bl(unsigned long pc, unsigned long dest)
 	return insn.word;
 }
 
+u32 larch_insn_gen_break(int imm)
+{
+	union loongarch_instruction insn;
+
+	if (imm < 0 || imm >= SZ_32K) {
+		pr_warn("The generated break instruction is out of range.\n");
+		return INSN_BREAK;
+	}
+
+	emit_break(&insn, imm);
+
+	return insn.word;
+}
+
 u32 larch_insn_gen_or(enum loongarch_gpr rd, enum loongarch_gpr rj, enum loongarch_gpr rk)
 {
 	union loongarch_instruction insn;