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authorSasha Levin <levinsasha928@gmail.com>2011-08-14 17:52:32 +0300
committerRusty Russell <rusty@rustcorp.com.au>2011-11-02 11:40:58 +1030
commit3ead6f4d42e2866a48d7abf9bc98553f1110b6df (patch)
treedb9bcecd8d232b0f3b9fb14589c58a872c400539 /include
parent51c6d61ac58844b5e3e0d28271084c06f6a15371 (diff)
downloadlinux-3ead6f4d42e2866a48d7abf9bc98553f1110b6df.tar.bz2
virtio_config: Add virtio_config_val_len()
This patch adds virtio_config_val_len() which allows retrieving variable length data from the virtio config space only if a specific feature is on. Cc: Amit Shah <amit.shah@redhat.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: virtualization@lists.linux-foundation.org Signed-off-by: Sasha Levin <levinsasha928@gmail.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include')
-rw-r--r--include/linux/virtio_config.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index 39c88c5ad19d..add4790b21fe 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -155,6 +155,9 @@ static inline bool virtio_has_feature(const struct virtio_device *vdev,
#define virtio_config_val(vdev, fbit, offset, v) \
virtio_config_buf((vdev), (fbit), (offset), (v), sizeof(*v))
+#define virtio_config_val_len(vdev, fbit, offset, v, len) \
+ virtio_config_buf((vdev), (fbit), (offset), (v), (len))
+
static inline int virtio_config_buf(struct virtio_device *vdev,
unsigned int fbit,
unsigned int offset,