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@xxxxxxxxxx> Cc: "Michael S. Tsirkin" <mst@xxxxxxxxxx> Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx> Cc: virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx> --- include/linux/virtio_config.h | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index 39c88c5..add4790 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, -- 1.7.6 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
