1 files changed, 32 insertions, 0 deletions
diff --git a/arch/s390/include/asm/skey.h b/arch/s390/include/asm/skey.h
new file mode 100644
index 000000000000..84e7cf28b712
--- /dev/null
+++ b/arch/s390/include/asm/skey.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_SKEY_H
+#define __ASM_SKEY_H
+
+#include <asm/rwonce.h>
+
+struct skey_region {
+	unsigned long start;
+	unsigned long end;
+};
+
+#define SKEY_REGION(_start, _end)			\
+	stringify_in_c(.section .skey_region,"a";)	\
+	stringify_in_c(.balign 8;)			\
+	stringify_in_c(.quad (_start);)			\
+	stringify_in_c(.quad (_end);)			\
+	stringify_in_c(.previous)
+
+extern int skey_regions_initialized;
+extern struct skey_region __skey_region_start[];
+extern struct skey_region __skey_region_end[];
+
+void __skey_regions_initialize(void);
+
+static inline void skey_regions_initialize(void)
+{
+	if (READ_ONCE(skey_regions_initialized))
+		return;
+	__skey_regions_initialize();
+}
+
+#endif /* __ASM_SKEY_H */