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-rw-r--r--src/vppinfra/time.h22
1 files changed, 10 insertions, 12 deletions
diff --git a/src/vppinfra/time.h b/src/vppinfra/time.h
index 288922d8a83..ead4b7d8ea4 100644
--- a/src/vppinfra/time.h
+++ b/src/vppinfra/time.h
@@ -114,6 +114,16 @@ clib_cpu_time_now (void)
return (u64) lo + ((u64) hi2 << (u64) 32);
}
+#elif defined (__aarch64__)
+always_inline u64
+clib_cpu_time_now (void)
+{
+ u64 vct;
+ /* User access to cntvct_el0 is enabled in Linux kernel since 3.12. */
+ asm volatile ("mrs %0, cntvct_el0":"=r" (vct));
+ return vct;
+}
+
#elif defined (__arm__)
#if defined(__ARM_ARCH_8A__)
always_inline u64
@@ -164,18 +174,6 @@ clib_cpu_time_now (void)
return ((u64) h << 32) | l;
}
-#elif defined (__aarch64__)
-always_inline u64
-clib_cpu_time_now (void)
-{
- u64 tsc;
-
- /* Works on Cavium ThunderX. Other platforms: YMMV */
- asm volatile ("mrs %0, cntvct_el0":"=r" (tsc));
-
- return tsc;
-}
-
#else
#error "don't know how to read CPU time stamp"