arm64: Performance counters support

This patch adds support for the AArch64 performance counters.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index f960ccb2edc6..8c36763b6890 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -88,6 +88,12 @@ void get_term_dimensions(struct winsize *ws);
 #define CPUINFO_PROC    "Processor"
 #endif
 
+#ifdef __aarch64__
+#include "../../arch/arm64/include/asm/unistd.h"
+#define rmb()           asm volatile("dmb ld" ::: "memory")
+#define cpu_relax()     asm volatile("yield" ::: "memory")
+#endif
+
 #ifdef __mips__
 #include "../../arch/mips/include/asm/unistd.h"
 #define rmb()           asm volatile(                                   \