1 files changed, 83 insertions, 0 deletions
diff --git a/arch/arm/mach-msm/perf_debug.c b/arch/arm/mach-msm/perf_debug.c
new file mode 100644
index 000000000000..8b07d6f6d24c
--- /dev/null
+++ b/arch/arm/mach-msm/perf_debug.c
@@ -0,0 +1,83 @@
+/* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/types.h>
+#include <linux/uaccess.h>
+#include <linux/debugfs.h>
+
+/*
+ * Subsequent patches should add an entry to end of this string.
+ * Format is incrementing sequence number followed by text of
+ * patch commit title with newline.
+ * Note trailing ';' is on its own line to simplify addition of
+ * future strings.
+ */
+static char *descriptions =
+	" 0 msm: perf: add debug patch logging framework\n"
+	" 1 Perf: port perf-events to 3.10 kernel\n"
+	" 2 Perf: keep events across hotplug\n"
+	" 3 Perf: bring CPU online if needed when disabling irq\n"
+	" 4 Perf: Support sw events across hotplug\n"
+	" 5 msm: perf: initialise krait perf L2 counter enables\n"
+	" 6 msm: perf: clean up duplicate constraint events\n"
+	" 7 Perf: Add L1 counters to tracepoints\n"
+	" 8 Perf: Make per-process counters configurable\n"
+	" 9 msm: perf: Add L2 support for tracecounters\n"
+	"10 ARM: dts: msm: add perf-events support for apq8084\n"
+	"11 ARM: dts: msm: add perf-events support for msmsamarium\n"
+	"12 Perf: Make per-process counters cumulative\n"
+	"13 Perf: Fix PID for tracepoints\n"
+	"14 Perf: preserve registers across hotplug\n"
+	"15 msm: perf: Fix cpu id logic in tracectr notifier\n"
+	"16 msm: perf: tracectr: Initialize cnts after hotplug\n"
+	"17 Perf: Reset pmu after hotplug\n"
+	"18 ARM: dts: msm: add perf-events support for msm8916\n"
+	"19 Perf: Enable pmuv3 on 32 bit kernel\n"
+;
+
+static ssize_t desc_read(struct file *fp, char __user *buf,
+			 size_t count, loff_t *pos)
+{
+	return simple_read_from_buffer(buf, count, pos, descriptions,
+				       strlen(descriptions));
+}
+
+static const struct file_operations perf_debug_desc_fops = {
+	.read = desc_read,
+};
+
+static int msm_perf_debugfs_init(void)
+{
+	int ret = 0;
+	struct dentry *dir;
+	struct dentry *file;
+
+	dir = debugfs_create_dir("msm-perf-patches", NULL);
+	if (IS_ERR_OR_NULL(dir)) {
+		pr_err("failed to create msm-perf-patches dir in debugfs\n");
+		ret = PTR_ERR(dir);
+		goto init_exit;
+	}
+
+	file = debugfs_create_file("descriptions", 0444, dir, NULL,
+				   &perf_debug_desc_fops);
+	if (IS_ERR_OR_NULL(file)) {
+		debugfs_remove(dir);
+		pr_err("failed to create descriptions file for msm-perf-patches\n");
+		ret = PTR_ERR(file);
+		goto init_exit;
+	}
+
+init_exit:
+	return ret;
+}
+late_initcall(msm_perf_debugfs_init);