1 files changed, 38 insertions, 0 deletions
diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h
new file mode 100644
index 000000000..cb729d111
--- /dev/null
+++ b/arch/s390/include/asm/cputime.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  Copyright IBM Corp. 2004
+ *
+ *  Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
+ */
+
+#ifndef _S390_CPUTIME_H
+#define _S390_CPUTIME_H
+
+#include <linux/types.h>
+#include <asm/timex.h>
+
+#define CPUTIME_PER_USEC 4096ULL
+#define CPUTIME_PER_SEC (CPUTIME_PER_USEC * USEC_PER_SEC)
+
+/* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */
+
+#define cmpxchg_cputime(ptr, old, new) cmpxchg64(ptr, old, new)
+
+/*
+ * Convert cputime to microseconds.
+ */
+static inline u64 cputime_to_usecs(const u64 cputime)
+{
+	return cputime >> 12;
+}
+
+/*
+ * Convert cputime to nanoseconds.
+ */
+#define cputime_to_nsecs(cputime) tod_to_ns(cputime)
+
+u64 arch_cpu_idle_time(int cpu);
+
+#define arch_idle_time(cpu) arch_cpu_idle_time(cpu)
+
+#endif /* _S390_CPUTIME_H */