linux-kernel - [PATCH 05/29] x86, tsx: Add a minimal RTM tester at bootup

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Date:	Fri, 22 Mar 2013 18:24:59 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	linux-kernel@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	x86@...nel.org, Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 05/29] x86, tsx: Add a minimal RTM tester at bootup

From: Andi Kleen <ak@...ux.intel.com>

May be removed later, but useful for basic sanity checking.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 arch/x86/kernel/Makefile   |    2 ++
 arch/x86/kernel/rtm-test.c |   22 ++++++++++++++++++++++
 2 files changed, 24 insertions(+), 0 deletions(-)
 create mode 100644 arch/x86/kernel/rtm-test.c

diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 7bd3bd3..f46aebd 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -114,3 +114,5 @@ ifeq ($(CONFIG_X86_64),y)
 	obj-$(CONFIG_PCI_MMCONFIG)	+= mmconf-fam10h_64.o
 	obj-y				+= vsmp_64.o
 endif
+
+obj-y					+= rtm-test.o
diff --git a/arch/x86/kernel/rtm-test.c b/arch/x86/kernel/rtm-test.c
new file mode 100644
index 0000000..5e138c1
--- /dev/null
+++ b/arch/x86/kernel/rtm-test.c
@@ -0,0 +1,22 @@
+#include <asm/rtm.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+
+int x;
+
+static __init int rtm_test(void)
+{
+	unsigned status;
+
+	pr_info("simple rtm test\n");
+	if ((status = _xbegin()) == _XBEGIN_STARTED) {
+		x++;
+		_xend();
+		pr_info("transaction committed\n");
+	} else {
+		pr_info("transaction aborted %x\n", status);
+	}
+	return 0;
+}
+
+device_initcall(rtm_test);
-- 
1.7.7.6

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