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9223cdb994
[ Upstream commit 9513f25056b22100ddffe24898c587873b0d022c ]
virtio pci uses word to mean "16 bits". mmio uses it to mean
"32 bits".
To avoid confusion, let's avoid the term in core virtio
altogether. Just say U64 to mean "64 bit".
Fixes: e7d4c1c5a5 ("virtio: introduce extended features")
Cc: Paolo Abeni <pabeni@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-ID: <ad53b7b6be87fc524f45abaeca0bb05fb3633397.1764225384.git.mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
118 lines
3.3 KiB
C
118 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#include <linux/virtio.h>
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#include <linux/virtio_config.h>
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#include <linux/debugfs.h>
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static struct dentry *virtio_debugfs_dir;
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static int virtio_debug_device_features_show(struct seq_file *s, void *data)
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{
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u64 device_features[VIRTIO_FEATURES_U64S];
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struct virtio_device *dev = s->private;
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unsigned int i;
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virtio_get_features(dev, device_features);
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for (i = 0; i < VIRTIO_FEATURES_BITS; i++) {
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if (virtio_features_test_bit(device_features, i))
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seq_printf(s, "%u\n", i);
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}
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(virtio_debug_device_features);
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static int virtio_debug_filter_features_show(struct seq_file *s, void *data)
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{
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struct virtio_device *dev = s->private;
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unsigned int i;
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for (i = 0; i < VIRTIO_FEATURES_BITS; i++) {
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if (virtio_features_test_bit(dev->debugfs_filter_features, i))
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seq_printf(s, "%u\n", i);
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}
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(virtio_debug_filter_features);
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static int virtio_debug_filter_features_clear(void *data, u64 val)
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{
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struct virtio_device *dev = data;
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if (val == 1)
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virtio_features_zero(dev->debugfs_filter_features);
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return 0;
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}
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DEFINE_DEBUGFS_ATTRIBUTE(virtio_debug_filter_features_clear_fops, NULL,
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virtio_debug_filter_features_clear, "%llu\n");
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static int virtio_debug_filter_feature_add(void *data, u64 val)
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{
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struct virtio_device *dev = data;
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if (val >= VIRTIO_FEATURES_BITS)
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return -EINVAL;
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virtio_features_set_bit(dev->debugfs_filter_features, val);
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return 0;
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}
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DEFINE_DEBUGFS_ATTRIBUTE(virtio_debug_filter_feature_add_fops, NULL,
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virtio_debug_filter_feature_add, "%llu\n");
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static int virtio_debug_filter_feature_del(void *data, u64 val)
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{
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struct virtio_device *dev = data;
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if (val >= VIRTIO_FEATURES_BITS)
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return -EINVAL;
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virtio_features_clear_bit(dev->debugfs_filter_features, val);
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return 0;
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}
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DEFINE_DEBUGFS_ATTRIBUTE(virtio_debug_filter_feature_del_fops, NULL,
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virtio_debug_filter_feature_del, "%llu\n");
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void virtio_debug_device_init(struct virtio_device *dev)
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{
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dev->debugfs_dir = debugfs_create_dir(dev_name(&dev->dev),
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virtio_debugfs_dir);
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debugfs_create_file("device_features", 0400, dev->debugfs_dir, dev,
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&virtio_debug_device_features_fops);
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debugfs_create_file("filter_features", 0400, dev->debugfs_dir, dev,
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&virtio_debug_filter_features_fops);
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debugfs_create_file("filter_features_clear", 0200, dev->debugfs_dir, dev,
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&virtio_debug_filter_features_clear_fops);
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debugfs_create_file("filter_feature_add", 0200, dev->debugfs_dir, dev,
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&virtio_debug_filter_feature_add_fops);
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debugfs_create_file("filter_feature_del", 0200, dev->debugfs_dir, dev,
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&virtio_debug_filter_feature_del_fops);
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}
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EXPORT_SYMBOL_GPL(virtio_debug_device_init);
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void virtio_debug_device_filter_features(struct virtio_device *dev)
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{
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virtio_features_andnot(dev->features_array, dev->features_array,
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dev->debugfs_filter_features);
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}
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EXPORT_SYMBOL_GPL(virtio_debug_device_filter_features);
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void virtio_debug_device_exit(struct virtio_device *dev)
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{
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debugfs_remove_recursive(dev->debugfs_dir);
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}
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EXPORT_SYMBOL_GPL(virtio_debug_device_exit);
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void virtio_debug_init(void)
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{
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virtio_debugfs_dir = debugfs_create_dir("virtio", NULL);
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}
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EXPORT_SYMBOL_GPL(virtio_debug_init);
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void virtio_debug_exit(void)
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{
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debugfs_remove_recursive(virtio_debugfs_dir);
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}
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EXPORT_SYMBOL_GPL(virtio_debug_exit);
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