From 3a46817f674389d5fb2f4dce19fbc73ebd1976bb Mon Sep 17 00:00:00 2001 From: Baruch Siach Date: Mon, 13 Jan 2014 12:27:35 +0200 Subject: [PATCH] perf tools: Add support for the xtensa architecture Tested using kernel tracepoints on a QEMU simulated environment. Kernel support for perf depends on the patch "xtensa: enable HAVE_PERF_EVENTS", which is scheduled for v3.14. Hardware performance counters are not supported under xtensa yet. Acked-by: Ingo Molnar Acked-by: Max Filippov Cc: Ingo Molnar Cc: Paul Mackerras Cc: Peter Zijlstra Cc: linux-xtensa@linux-xtensa.org Link: http://lkml.kernel.org/r/aafcdb22f04e2d3188d2938528939481be56b649.1389608855.git.baruch@tkos.co.il Signed-off-by: Baruch Siach Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/perf.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/tools/perf/perf.h b/tools/perf/perf.h index 3c2f213e979d..7daa806d9050 100644 --- a/tools/perf/perf.h +++ b/tools/perf/perf.h @@ -132,6 +132,13 @@ #define CPUINFO_PROC "CPU" #endif +#ifdef __xtensa__ +#define mb() asm volatile("memw" ::: "memory") +#define wmb() asm volatile("memw" ::: "memory") +#define rmb() asm volatile("" ::: "memory") +#define CPUINFO_PROC "core ID" +#endif + #define barrier() asm volatile ("" ::: "memory") #ifndef cpu_relax -- 2.20.1