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-rw-r--r--arch/arm64/include/asm/scs.h30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/scs.h b/arch/arm64/include/asm/scs.h
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index 000000000..5cd4d09bc
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+++ b/arch/arm64/include/asm/scs.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_SCS_H
+#define _ASM_SCS_H
+
+#ifdef __ASSEMBLY__
+
+#include <asm/asm-offsets.h>
+
+#ifdef CONFIG_SHADOW_CALL_STACK
+ scs_sp .req x18
+
+ .macro scs_load_current
+ get_current_task scs_sp
+ ldr scs_sp, [scs_sp, #TSK_TI_SCS_SP]
+ .endm
+
+ .macro scs_save tsk
+ str scs_sp, [\tsk, #TSK_TI_SCS_SP]
+ .endm
+#else
+ .macro scs_load_current
+ .endm
+
+ .macro scs_save tsk
+ .endm
+#endif /* CONFIG_SHADOW_CALL_STACK */
+
+#endif /* __ASSEMBLY __ */
+
+#endif /* _ASM_SCS_H */