1 files changed, 38 insertions, 0 deletions
diff --git a/arch/s390/include/asm/access-regs.h b/arch/s390/include/asm/access-regs.h
new file mode 100644
index 000000000000..1a6412d9f5ad
--- /dev/null
+++ b/arch/s390/include/asm/access-regs.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright IBM Corp. 1999, 2024
+ */
+
+#ifndef __ASM_S390_ACCESS_REGS_H
+#define __ASM_S390_ACCESS_REGS_H
+
+#include <linux/instrumented.h>
+#include <asm/sigcontext.h>
+
+struct access_regs {
+	unsigned int regs[NUM_ACRS];
+};
+
+static inline void save_access_regs(unsigned int *acrs)
+{
+	struct access_regs *regs = (struct access_regs *)acrs;
+
+	instrument_write(regs, sizeof(*regs));
+	asm volatile("stamy	0,15,%[regs]"
+		     : [regs] "=QS" (*regs)
+		     :
+		     : "memory");
+}
+
+static inline void restore_access_regs(unsigned int *acrs)
+{
+	struct access_regs *regs = (struct access_regs *)acrs;
+
+	instrument_read(regs, sizeof(*regs));
+	asm volatile("lamy	0,15,%[regs]"
+		     :
+		     : [regs] "QS" (*regs)
+		     : "memory");
+}
+
+#endif /* __ASM_S390_ACCESS_REGS_H */