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Diffstat (limited to 'arch/arm64/kernel/jump_label.c')
-rw-r--r--arch/arm64/kernel/jump_label.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm64/kernel/jump_label.c b/arch/arm64/kernel/jump_label.c
new file mode 100644
index 0000000000..faf88ec9c4
--- /dev/null
+++ b/arch/arm64/kernel/jump_label.c
@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013 Huawei Ltd.
+ * Author: Jiang Liu <liuj97@gmail.com>
+ *
+ * Based on arch/arm/kernel/jump_label.c
+ */
+#include <linux/kernel.h>
+#include <linux/jump_label.h>
+#include <asm/insn.h>
+#include <asm/patching.h>
+
+void arch_jump_label_transform(struct jump_entry *entry,
+ enum jump_label_type type)
+{
+ void *addr = (void *)jump_entry_code(entry);
+ u32 insn;
+
+ if (type == JUMP_LABEL_JMP) {
+ insn = aarch64_insn_gen_branch_imm(jump_entry_code(entry),
+ jump_entry_target(entry),
+ AARCH64_INSN_BRANCH_NOLINK);
+ } else {
+ insn = aarch64_insn_gen_nop();
+ }
+
+ aarch64_insn_patch_text_nosync(addr, insn);
+}