Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
118 lines
3.3 KiB
C
118 lines
3.3 KiB
C
// 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_U64S];
|
|
struct virtio_device *dev = s->private;
|
|
unsigned int i;
|
|
|
|
virtio_get_features(dev, device_features);
|
|
for (i = 0; i < VIRTIO_FEATURES_BITS; 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_BITS; 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_BITS)
|
|
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_BITS)
|
|
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);
|