Add support for specific clock sources
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/arch/arch-x86_64.h b/arch/arch-x86_64.h
index 457714c..3ea8070 100644
--- a/arch/arch-x86_64.h
+++ b/arch/arch-x86_64.h
@@ -38,7 +38,17 @@
__asm__("bsfl %1,%0" :"=r" (bitmask) :"r" (~bitmask));
return bitmask;
}
+
+static inline unsigned long long get_cpu_clock(void)
+{
+ unsigned int lo, hi;
+
+ __asm__ __volatile__("rdtsc" : "=a" (lo), "=d" (hi));
+ return ((unsigned long long) hi << 32ULL) | lo;
+}
+
#define ARCH_HAVE_FFZ
#define ARCH_HAVE_SSE
+#define ARCH_HAVE_CPU_CLOCK
#endif