From b410bb49d101eb9396f5ab37ac80b1691ea1d6b0 Mon Sep 17 00:00:00 2001
From: Ulrich Weigand <ulrich.weigand@de.ibm.com>
Date: Fri, 11 Oct 2019 20:21:01 +0200
Subject: [PATCH] Cycles: Add support for IBM Z

Patch provided by Yaakov Selkowitz <yselkowi@redhat.com>.

Signed-off-by: Ulrich Weigand <ulrich.weigand@de.ibm.com>
---
 src/common/Cycles.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/common/Cycles.h b/src/common/Cycles.h
index bb47d5cb029..16e0aa67fc1 100644
--- a/src/common/Cycles.h
+++ b/src/common/Cycles.h
@@ -78,6 +78,10 @@ class Cycles {
     uint32_t lo = 0, hi = 0;
     asm volatile("mftbu %0; mftb %1" : "=r" (hi), "=r" (lo));
     return (((uint64_t)hi << 32) | lo);
+#elif defined(__s390__)
+    uint64_t tsc;
+    asm volatile("stck %0" : "=Q" (tsc) : : "cc");
+    return tsc;
 #else
 #warning No high-precision counter available for your OS/arch
     return 0;
-- 
2.39.5