lkml.org 
[lkml]   [2014]   [Jan]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3] perf: add support for the xtensa architecture
Date
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: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
---
v2: use the "core ID" field from /proc/cpuinfo (Max Filippov)

v3: add testing and kernel dependency information (Ingo Molnar)
---
tools/perf/perf.h | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index b079304bd53d..e441864dbe03 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
--
1.8.5.2


\
 
 \ /
  Last update: 2014-01-13 11:41    [W:0.155 / U:0.260 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site