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authorBaruch Siach <baruch@tkos.co.il>2014-01-13 12:27:35 +0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2014-01-20 16:19:08 -0300
commit3a46817f674389d5fb2f4dce19fbc73ebd1976bb (patch)
tree7093c1017538e62dc40f33d602041830411925b2 /tools/perf/perf.h
parent8bac41cbfe2efe55e2b93673b84761ed7dd75f69 (diff)
downloadlinux-3a46817f674389d5fb2f4dce19fbc73ebd1976bb.tar.gz
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 <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>
Diffstat (limited to 'tools/perf/perf.h')
-rw-r--r--tools/perf/perf.h7
1 files changed, 7 insertions, 0 deletions
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