blob: d36b431a51698d8723af35903ab40de4172e1814 [file] [log] [blame]
Ashwin Chaugule4bacd562013-02-20 19:12:56 -05001/* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
Neil Leedera320a282013-01-07 15:12:45 -05002 *
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 */
12
13#include <linux/types.h>
14#include <linux/uaccess.h>
15#include <linux/debugfs.h>
16
17/*
18 * Subsequent patches should add an entry to end of this string.
19 * Format is incrementing sequence number followed by text of
20 * patch commit title with newline.
21 * Note trailing ';' is on its own line to simplify addition of
22 * future strings.
23 */
24static char *descriptions =
25 "0 msm: perf: add debug patch logging framework\n"
Ashwin Chaugulec4c5fc12013-01-08 15:55:06 -050026 "1 Perf: Restore counter after powercollapse for generic ARM PMU's\n"
Ashwin Chaugule4cdf85a2013-01-16 11:22:08 -050027 "2 Perf: Toggle PMU IRQ when CPU's are hotplugged\n"
Neil Leeder05cfbed2013-02-19 16:10:10 -050028 "3 Perf: Correct irq for CPU hotplug detection\n"
Ashwin Chaugule4bacd562013-02-20 19:12:56 -050029 "4 Perf: Check perf activity on correct CPU\n"
Ashwin Chauguledbeaf182013-03-14 18:37:49 -040030 "7 Perf: Add L1 counters to tracepoints\n"
Sheetal Sahasrabudhed0080dd2013-06-18 15:42:41 -040031 "10 Perf: Fix counts across power collapse\n"
Sheetal Sahasrabudhe12f2d6e2013-07-10 12:18:59 -040032 "12 Perf: Make per-process counters configurable\n"
Sheetal Sahasrabudhe811f4b02013-07-23 10:54:06 -040033 "13 msm: perf: Add L2 support for tracecounters\n"
Neil Leeder8165d842013-04-08 17:13:21 -040034 "14 Perf: keep events across hotplug\n"
Neil Leeder44971e32013-08-28 14:31:18 -040035 "15 Perf: bring CPU online if needed when disabling irq\n"
Neil Leedera320a282013-01-07 15:12:45 -050036;
37
38static ssize_t desc_read(struct file *fp, char __user *buf,
39 size_t count, loff_t *pos)
40{
41 return simple_read_from_buffer(buf, count, pos, descriptions,
42 strlen(descriptions));
43}
44
45static const struct file_operations perf_debug_desc_fops = {
46 .read = desc_read,
47};
48
49static int msm_perf_debugfs_init(void)
50{
51 int ret = 0;
52 struct dentry *dir;
53 struct dentry *file;
54
55 dir = debugfs_create_dir("msm-perf-patches", NULL);
56 if (IS_ERR_OR_NULL(dir)) {
57 pr_err("failed to create msm-perf-patches dir in debugfs\n");
58 ret = PTR_ERR(dir);
59 goto init_exit;
60 }
61
62 file = debugfs_create_file("descriptions", 0444, dir, NULL,
63 &perf_debug_desc_fops);
64 if (IS_ERR_OR_NULL(file)) {
65 debugfs_remove(dir);
66 pr_err("failed to create descriptions file for msm-perf-patches\n");
67 ret = PTR_ERR(file);
68 goto init_exit;
69 }
70
71init_exit:
72 return ret;
73}
74late_initcall(msm_perf_debugfs_init);