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Subject[PATCH 16/30] perf tools: Move arm(64) barrier.h stuff to tools/arch/arm*/include/asm/barrier.h
Date
From: Arnaldo Carvalho de Melo <acme@redhat.com>

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-cgfhreaejd7ohitdjccu9k2o@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/arch/arm/include/asm/barrier.h | 12 ++++++++++++
tools/arch/arm64/include/asm/barrier.h | 16 ++++++++++++++++
tools/include/asm/barrier.h | 4 ++++
tools/perf/MANIFEST | 1 +
tools/perf/perf-sys.h | 10 ----------
5 files changed, 33 insertions(+), 10 deletions(-)
create mode 100644 tools/arch/arm/include/asm/barrier.h
create mode 100644 tools/arch/arm64/include/asm/barrier.h

diff --git a/tools/arch/arm/include/asm/barrier.h b/tools/arch/arm/include/asm/barrier.h
new file mode 100644
index 0000000..005c618
--- /dev/null
+++ b/tools/arch/arm/include/asm/barrier.h
@@ -0,0 +1,12 @@
+#ifndef _TOOLS_LINUX_ASM_ARM_BARRIER_H
+#define _TOOLS_LINUX_ASM_ARM_BARRIER_H
+
+/*
+ * Use the __kuser_memory_barrier helper in the CPU helper page. See
+ * arch/arm/kernel/entry-armv.S in the kernel source for details.
+ */
+#define mb() ((void(*)(void))0xffff0fa0)()
+#define wmb() ((void(*)(void))0xffff0fa0)()
+#define rmb() ((void(*)(void))0xffff0fa0)()
+
+#endif /* _TOOLS_LINUX_ASM_ARM_BARRIER_H */
diff --git a/tools/arch/arm64/include/asm/barrier.h b/tools/arch/arm64/include/asm/barrier.h
new file mode 100644
index 0000000..a0483c8
--- /dev/null
+++ b/tools/arch/arm64/include/asm/barrier.h
@@ -0,0 +1,16 @@
+#ifndef _TOOLS_LINUX_ASM_AARCH64_BARRIER_H
+#define _TOOLS_LINUX_ASM_AARCH64_BARRIER_H
+
+/*
+ * From tools/perf/perf-sys.h, last modified in:
+ * f428ebd184c82a7914b2aa7e9f868918aaf7ea78 perf tools: Fix AAAAARGH64 memory barriers
+ *
+ * XXX: arch/arm64/include/asm/barrier.h in the kernel sources use dsb, is this
+ * a case like for arm32 where we do things differently in userspace?
+ */
+
+#define mb() asm volatile("dmb ish" ::: "memory")
+#define wmb() asm volatile("dmb ishst" ::: "memory")
+#define rmb() asm volatile("dmb ishld" ::: "memory")
+
+#endif /* _TOOLS_LINUX_ASM_AARCH64_BARRIER_H */
diff --git a/tools/include/asm/barrier.h b/tools/include/asm/barrier.h
index 659aa60..d2ddca50 100644
--- a/tools/include/asm/barrier.h
+++ b/tools/include/asm/barrier.h
@@ -1,5 +1,9 @@
#if defined(__i386__) || defined(__x86_64__)
#include "../../arch/x86/include/asm/barrier.h"
+#elif defined(__arm__)
+#include "../../arch/arm/include/asm/barrier.h"
+#elif defined(__aarch64__)
+#include "../../arch/arm64/include/asm/barrier.h"
#elif defined(__powerpc__)
#include "../../arch/powerpc/include/asm/barrier.h"
#elif defined(__s390__)
diff --git a/tools/perf/MANIFEST b/tools/perf/MANIFEST
index 74981a6..1b330dd 100644
--- a/tools/perf/MANIFEST
+++ b/tools/perf/MANIFEST
@@ -1,5 +1,6 @@
tools/perf
tools/arch/alpha/include/asm/barrier.h
+tools/arch/arm/include/asm/barrier.h
tools/arch/ia64/include/asm/barrier.h
tools/arch/powerpc/include/asm/barrier.h
tools/arch/s390/include/asm/barrier.h
diff --git a/tools/perf/perf-sys.h b/tools/perf/perf-sys.h
index 79052fd..56edbe1 100644
--- a/tools/perf/perf-sys.h
+++ b/tools/perf/perf-sys.h
@@ -70,20 +70,10 @@
#endif

#ifdef __arm__
-/*
- * Use the __kuser_memory_barrier helper in the CPU helper page. See
- * arch/arm/kernel/entry-armv.S in the kernel source for details.
- */
-#define mb() ((void(*)(void))0xffff0fa0)()
-#define wmb() ((void(*)(void))0xffff0fa0)()
-#define rmb() ((void(*)(void))0xffff0fa0)()
#define CPUINFO_PROC {"model name", "Processor"}
#endif

#ifdef __aarch64__
-#define mb() asm volatile("dmb ish" ::: "memory")
-#define wmb() asm volatile("dmb ishst" ::: "memory")
-#define rmb() asm volatile("dmb ishld" ::: "memory")
#define cpu_relax() asm volatile("yield" ::: "memory")
#endif

--
2.1.0


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