fio: fix s390 time accounting

[fio.git] / arch / arch-s390.h

diff --git a/arch/arch-s390.h b/arch/arch-s390.h
index fe5179134891d66d944797ee8132f2a306e4513c..2c205de3a8455f04b1b9a5729b63dce70547aa61 100644 (file)
--- a/arch/arch-s390.h
+++ b/arch/arch-s390.h
@@ -22,4 +22,27 @@
 #define read_barrier() asm volatile("bcr 15,0" : : : "memory")
 #define write_barrier()        asm volatile("bcr 15,0" : : : "memory")
 
+/*
+ * Fio needs monotonic (never lower), but not strict monotonic (never the same)
+ * so store clock fast is enough
+ */
+static inline unsigned long long get_cpu_clock(void)
+{
+       unsigned long long clk;
+
+       __asm__ __volatile__("stckf %0" : "=Q" (clk) : : "cc");
+       return clk>>12;
+}
+
+#define ARCH_CPU_CLOCK_CYCLES_PER_USEC 1
+#define ARCH_HAVE_CPU_CLOCK
+
+#define ARCH_HAVE_INIT
+extern int tsc_reliable;
+static inline int arch_init(char *envp[])
+{
+       tsc_reliable = 1;
+       return 0;
+}
+
 #endif