summaryrefslogtreecommitdiff
path: root/tools/arch
diff options
context:
space:
mode:
authorArnaldo Carvalho de Melo <acme@redhat.com>2015-05-06 18:44:53 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-05-08 16:05:04 -0300
commit07d207ac0c55a413c358153bd3012c5fa51a0554 (patch)
treee22562e603d584c0e40df847c969c2bc93be8643 /tools/arch
parente43a19c9c2c30cf88ffafb8390a4c53400b2467e (diff)
perf tools: Move s390 barrier.h stuff to tools/arch/s390/include/asm/barrier.h
We will need it for atomic.h, so move it from the ad-hoc tools/perf/ place to a tools/ subset of the kernel arch/ hierarchy. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-zv4x77074resrkl4ayzf5e7d@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/arch')
-rw-r--r--tools/arch/s390/include/asm/barrier.h30
1 files changed, 30 insertions, 0 deletions
diff --git a/tools/arch/s390/include/asm/barrier.h b/tools/arch/s390/include/asm/barrier.h
new file mode 100644
index 000000000000..f85141266b92
--- /dev/null
+++ b/tools/arch/s390/include/asm/barrier.h
@@ -0,0 +1,30 @@
+/*
+ * Copied from the kernel sources:
+ *
+ * Copyright IBM Corp. 1999, 2009
+ *
+ * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
+ */
+
+#ifndef __TOOLS_LINUX_ASM_BARRIER_H
+#define __TOOLS_LINUX_ASM_BARRIER_H
+
+/*
+ * Force strict CPU ordering.
+ * And yes, this is required on UP too when we're talking
+ * to devices.
+ */
+
+#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
+/* Fast-BCR without checkpoint synchronization */
+#define __ASM_BARRIER "bcr 14,0\n"
+#else
+#define __ASM_BARRIER "bcr 15,0\n"
+#endif
+
+#define mb() do { asm volatile(__ASM_BARRIER : : : "memory"); } while (0)
+
+#define rmb() mb()
+#define wmb() mb()
+
+#endif /* __TOOLS_LIB_ASM_BARRIER_H */