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.s...@redhat.com>
Cc: "Michael S. Tsirkin" <m...@redhat.com>
Cc: Rusty Russell <ru...@rustcorp.com.au>
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Sasha Levin <levinsasha...@gmail.com>
---
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
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