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| author | Matej Genci <matej.genci@nutanix.com> | 2019-09-11 14:49:53 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-06-02 08:45:13 +0200 |
| commit | e7c8cc35a64d1d21e6fb811c519eadbda30f4f77 (patch) | |
| tree | a2065d7a2dfb7fc69b2dce63f76995bdd6006b09 | |
| parent | Linux 5.7 (diff) | |
| download | linux-e7c8cc35a64d1d21e6fb811c519eadbda30f4f77.tar.xz linux-e7c8cc35a64d1d21e6fb811c519eadbda30f4f77.zip | |
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>
| -rw-r--r-- | drivers/virtio/virtio_pci_modern.c | 1 | ||||
| -rw-r--r-- | include/uapi/linux/virtio_ring.h | 4 |
2 files changed, 5 insertions, 0 deletions
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c index 7abcc50838b8..db93cedd262f 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -16,6 +16,7 @@ #include <linux/delay.h> #define VIRTIO_PCI_NO_LEGACY +#define VIRTIO_RING_NO_LEGACY #include "virtio_pci_common.h" /* 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, |