1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
// SPDX-License-Identifier: GPL-2.0-or-later
#include <linux/virtio.h>
#include <linux/virtio_config.h>
#include <linux/debugfs.h>
static struct dentry *virtio_debugfs_dir;
static int virtio_debug_device_features_show(struct seq_file *s, void *data)
{
u64 device_features[VIRTIO_FEATURES_DWORDS];
struct virtio_device *dev = s->private;
unsigned int i;
virtio_get_features(dev, device_features);
for (i = 0; i < VIRTIO_FEATURES_MAX; i++) {
if (virtio_features_test_bit(device_features, i))
seq_printf(s, "%u\n", i);
}
return 0;
}
DEFINE_SHOW_ATTRIBUTE(virtio_debug_device_features);
static int virtio_debug_filter_features_show(struct seq_file *s, void *data)
{
struct virtio_device *dev = s->private;
unsigned int i;
for (i = 0; i < VIRTIO_FEATURES_MAX; i++) {
if (virtio_features_test_bit(dev->debugfs_filter_features, i))
seq_printf(s, "%u\n", i);
}
return 0;
}
DEFINE_SHOW_ATTRIBUTE(virtio_debug_filter_features);
static int virtio_debug_filter_features_clear(void *data, u64 val)
{
struct virtio_device *dev = data;
if (val == 1)
virtio_features_zero(dev->debugfs_filter_features);
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(virtio_debug_filter_features_clear_fops, NULL,
virtio_debug_filter_features_clear, "%llu\n");
static int virtio_debug_filter_feature_add(void *data, u64 val)
{
struct virtio_device *dev = data;
if (val >= VIRTIO_FEATURES_MAX)
return -EINVAL;
virtio_features_set_bit(dev->debugfs_filter_features, val);
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(virtio_debug_filter_feature_add_fops, NULL,
virtio_debug_filter_feature_add, "%llu\n");
static int virtio_debug_filter_feature_del(void *data, u64 val)
{
struct virtio_device *dev = data;
if (val >= VIRTIO_FEATURES_MAX)
return -EINVAL;
virtio_features_clear_bit(dev->debugfs_filter_features, val);
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(virtio_debug_filter_feature_del_fops, NULL,
virtio_debug_filter_feature_del, "%llu\n");
void virtio_debug_device_init(struct virtio_device *dev)
{
dev->debugfs_dir = debugfs_create_dir(dev_name(&dev->dev),
virtio_debugfs_dir);
debugfs_create_file("device_features", 0400, dev->debugfs_dir, dev,
&virtio_debug_device_features_fops);
debugfs_create_file("filter_features", 0400, dev->debugfs_dir, dev,
&virtio_debug_filter_features_fops);
debugfs_create_file("filter_features_clear", 0200, dev->debugfs_dir, dev,
&virtio_debug_filter_features_clear_fops);
debugfs_create_file("filter_feature_add", 0200, dev->debugfs_dir, dev,
&virtio_debug_filter_feature_add_fops);
debugfs_create_file("filter_feature_del", 0200, dev->debugfs_dir, dev,
&virtio_debug_filter_feature_del_fops);
}
EXPORT_SYMBOL_GPL(virtio_debug_device_init);
void virtio_debug_device_filter_features(struct virtio_device *dev)
{
virtio_features_andnot(dev->features_array, dev->features_array,
dev->debugfs_filter_features);
}
EXPORT_SYMBOL_GPL(virtio_debug_device_filter_features);
void virtio_debug_device_exit(struct virtio_device *dev)
{
debugfs_remove_recursive(dev->debugfs_dir);
}
EXPORT_SYMBOL_GPL(virtio_debug_device_exit);
void virtio_debug_init(void)
{
virtio_debugfs_dir = debugfs_create_dir("virtio", NULL);
}
EXPORT_SYMBOL_GPL(virtio_debug_init);
void virtio_debug_exit(void)
{
debugfs_remove_recursive(virtio_debugfs_dir);
}
EXPORT_SYMBOL_GPL(virtio_debug_exit);
|
