1 files changed, 8 insertions, 0 deletions

diff --git a/arch/arm64/include/asm/pointer_auth.h b/arch/arm64/include/asm/pointer_auth.h
index 91c4185dda5b..2a22c03c1540 100644
--- a/arch/arm64/include/asm/pointer_auth.h
+++ b/arch/arm64/include/asm/pointer_auth.h
@@ -2,9 +2,11 @@
 #ifndef __ASM_POINTER_AUTH_H
 #define __ASM_POINTER_AUTH_H
 
+#include <linux/bitops.h>
 #include <linux/random.h>
 
 #include <asm/cpufeature.h>
+#include <asm/memory.h>
 #include <asm/sysreg.h>
 
 #ifdef CONFIG_ARM64_PTR_AUTH
@@ -61,6 +63,12 @@ static inline void ptrauth_keys_switch(struct ptrauth_keys *keys)
                 __ptrauth_key_install(APGA, keys->apga);
 }
 
+/*
+ * The EL0 pointer bits used by a pointer authentication code.
+ * This is dependent on TBI0 being enabled, or bits 63:56 would also apply.
+ */
+#define ptrauth_user_pac_mask() GENMASK(54, vabits_user)
+
 #define ptrauth_thread_init_user(tsk)                                   \
 do {                                                                    \
         struct task_struct *__ptiu_tsk = (tsk);                         \