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| author | Matej Genci <matej.genci@nutanix.com> | 2019-09-11 15:49:53 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-06-02 09:45:13 +0300 |
| commit | e7c8cc35a64d1d21e6fb811c519eadbda30f4f77 (patch) | |
| tree | a2065d7a2dfb7fc69b2dce63f76995bdd6006b09 /include/uapi/linux/virtio_ring.h | |
| parent | 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 (diff) | |
| download | linux-e7c8cc35a64d1d21e6fb811c519eadbda30f4f77.tar.xz | |
virtio: add VIRTIO_RING_NO_LEGACY
Add macro to disable legacy vring functions.
Signed-off-by: Matej Genci <matej.genci@nutanix.com>
Link: https://lore.kernel.org/r/20190911124942.243713-1-matej.genci@nutanix.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/uapi/linux/virtio_ring.h')
| -rw-r--r-- | include/uapi/linux/virtio_ring.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/uapi/linux/virtio_ring.h b/include/uapi/linux/virtio_ring.h index 559f42e73315..9223c3a5c46a 100644 --- a/include/uapi/linux/virtio_ring.h +++ b/include/uapi/linux/virtio_ring.h @@ -135,6 +135,8 @@ struct vring { #define VRING_USED_ALIGN_SIZE 4 #define VRING_DESC_ALIGN_SIZE 16 +#ifndef VIRTIO_RING_NO_LEGACY + /* The standard layout for the ring is a continuous chunk of memory which looks * like this. We assume num is a power of 2. * @@ -181,6 +183,8 @@ static inline unsigned vring_size(unsigned int num, unsigned long align) + sizeof(__virtio16) * 3 + sizeof(struct vring_used_elem) * num; } +#endif /* VIRTIO_RING_NO_LEGACY */ + /* The following is used with USED_EVENT_IDX and AVAIL_EVENT_IDX */ /* Assuming a given event_idx value from the other side, if * we have just incremented index from old to new_idx, |