Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 3/8] perf tools: Add support for the xtensa architecture | Date | Tue, 21 Jan 2014 17:42:59 -0300 |
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From: Baruch Siach <baruch@tkos.co.il>
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 <mingo@kernel.org> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: linux-xtensa@linux-xtensa.org Link: http://lkml.kernel.org/r/aafcdb22f04e2d3188d2938528939481be56b649.1389608855.git.baruch@tkos.co.il Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- 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 -- 1.8.1.4
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