1 files changed, 72 insertions, 0 deletions
diff --git a/arch/openrisc/include/asm/jump_label.h b/arch/openrisc/include/asm/jump_label.h
new file mode 100644
index 000000000000..3ec0f4e19f9c
--- /dev/null
+++ b/arch/openrisc/include/asm/jump_label.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2025 Chen Miao
+ *
+ * Based on arch/arm/include/asm/jump_label.h
+ */
+#ifndef __ASM_OPENRISC_JUMP_LABEL_H
+#define __ASM_OPENRISC_JUMP_LABEL_H
+
+#ifndef __ASSEMBLER__
+
+#include <linux/types.h>
+#include <asm/insn-def.h>
+
+#define HAVE_JUMP_LABEL_BATCH
+
+#define JUMP_LABEL_NOP_SIZE OPENRISC_INSN_SIZE
+
+/**
+ * JUMP_TABLE_ENTRY - Create a jump table entry
+ * @key: Jump key identifier (typically a symbol address)
+ * @label: Target label address
+ *
+ * This macro creates a jump table entry in the dedicated kernel section (__jump_table).
+ * Each entry contains the following information:
+ * 		Offset from current instruction to jump instruction (1b - .)
+ * 		Offset from current instruction to target label (label - .)
+ * 		Offset from current instruction to key identifier (key - .)
+ */
+#define JUMP_TABLE_ENTRY(key, label)			\
+	".pushsection	__jump_table, \"aw\"	\n\t"	\
+	".align 	4 			\n\t"	\
+	".long 		1b - ., " label " - .	\n\t"	\
+	".long 		" key " - . 		\n\t"	\
+	".popsection				\n\t"
+
+#define ARCH_STATIC_BRANCH_ASM(key, label)		\
+	".align		4			\n\t"	\
+	"1: l.nop				\n\t"	\
+	"    l.nop				\n\t"	\
+	JUMP_TABLE_ENTRY(key, label)
+
+static __always_inline bool arch_static_branch(struct static_key *const key,
+					       const bool branch)
+{
+	asm goto (ARCH_STATIC_BRANCH_ASM("%0", "%l[l_yes]")
+		  ::"i"(&((char *)key)[branch])::l_yes);
+
+	return false;
+l_yes:
+	return true;
+}
+
+#define ARCH_STATIC_BRANCH_JUMP_ASM(key, label)		\
+	".align		4			\n\t"	\
+	"1: l.j	" label "			\n\t"	\
+	"    l.nop				\n\t"	\
+	JUMP_TABLE_ENTRY(key, label)
+
+static __always_inline bool
+arch_static_branch_jump(struct static_key *const key, const bool branch)
+{
+	asm goto (ARCH_STATIC_BRANCH_JUMP_ASM("%0", "%l[l_yes]")
+		  ::"i"(&((char *)key)[branch])::l_yes);
+
+	return false;
+l_yes:
+	return true;
+}
+
+#endif /* __ASSEMBLER__ */
+#endif /* __ASM_OPENRISC_JUMP_LABEL_H */