These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / tools / testing / selftests / powerpc / pmu / ebb / ebb.c

diff --git a/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb.c b/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb.c
index d7a72ce..9729d9f 100644 (file)
--- a/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb.c
+++ b/kernel/tools/testing/selftests/powerpc/pmu/ebb/ebb.c
@@ -13,6 +13,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/ioctl.h>
+#include <linux/auxvec.h>
 
 #include "trace.h"
 #include "reg.h"
@@ -319,6 +320,16 @@ void ebb_global_disable(void)
        mb();
 }
 
+bool ebb_is_supported(void)
+{
+#ifdef PPC_FEATURE2_EBB
+       /* EBB requires at least POWER8 */
+       return ((long)get_auxv_entry(AT_HWCAP2) & PPC_FEATURE2_EBB);
+#else
+       return false;
+#endif
+}
+
 void event_ebb_init(struct event *e)
 {
        e->attr.config |= (1ull << 63);