1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/mte.h b/arch/arm64/include/asm/mte.h
index 1a919905295b..7ea0c0e526d1 100644
--- a/arch/arm64/include/asm/mte.h
+++ b/arch/arm64/include/asm/mte.h
@@ -5,6 +5,11 @@
 #ifndef __ASM_MTE_H
 #define __ASM_MTE_H
 
+#define MTE_GRANULE_SIZE	UL(16)
+#define MTE_GRANULE_MASK	(~(MTE_GRANULE_SIZE - 1))
+#define MTE_TAG_SHIFT		56
+#define MTE_TAG_SIZE		4
+
 #ifndef __ASSEMBLY__
 
 #include <linux/page-flags.h>
@@ -12,6 +17,10 @@
 #include <asm/pgtable-types.h>
 
 void mte_clear_page_tags(void *addr);
+unsigned long mte_copy_tags_from_user(void *to, const void __user *from,
+				      unsigned long n);
+unsigned long mte_copy_tags_to_user(void __user *to, void *from,
+				    unsigned long n);
 
 #ifdef CONFIG_ARM64_MTE
 
@@ -25,6 +34,8 @@ void mte_thread_switch(struct task_struct *next);
 void mte_suspend_exit(void);
 long set_mte_ctrl(struct task_struct *task, unsigned long arg);
 long get_mte_ctrl(struct task_struct *task);
+int mte_ptrace_copy_tags(struct task_struct *child, long request,
+			 unsigned long addr, unsigned long data);
 
 #else
 
@@ -54,6 +65,12 @@ static inline long get_mte_ctrl(struct task_struct *task)
 {
 	return 0;
 }
+static inline int mte_ptrace_copy_tags(struct task_struct *child,
+				       long request, unsigned long addr,
+				       unsigned long data)
+{
+	return -EIO;
+}
 
 #endif