Merge tag 's390-6.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

[linux-2.6-microblaze.git] / arch / s390 / include / asm / access-regs.h

diff --git a/arch/s390/include/asm/access-regs.h b/arch/s390/include/asm/access-regs.h
new file mode 100644 (file)
index 0000000..1a6412d
--- /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 */