On Fri, Feb 23, 2018 at 07:18:00PM +0800, Tiwei Bie wrote:
Signed-off-by: Tiwei Bie <tiwei.bie@xxxxxxxxx>
---
include/uapi/linux/virtio_config.h | 18 +++++++++-
include/uapi/linux/virtio_ring.h | 68 ++++++++++++++++++++++++++++++++++++++
2 files changed, 85 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/virtio_config.h b/include/uapi/linux/virtio_config.h
index 308e2096291f..e3d077ef5207 100644
--- a/include/uapi/linux/virtio_config.h
+++ b/include/uapi/linux/virtio_config.h
@@ -49,7 +49,7 @@
* transport being used (eg. virtio_ring), the rest are per-device feature
* bits. */
#define VIRTIO_TRANSPORT_F_START 28
-#define VIRTIO_TRANSPORT_F_END 34
+#define VIRTIO_TRANSPORT_F_END 37
#ifndef VIRTIO_CONFIG_NO_LEGACY
/* Do we get callbacks when the ring is completely used, even if we've
@@ -71,4 +71,20 @@
* this is for compatibility with legacy systems.
*/
#define VIRTIO_F_IOMMU_PLATFORM 33
+
+/* This feature indicates support for the packed virtqueue layout. */
+#define VIRTIO_F_RING_PACKED 34
Spec says VIRTIO_F_PACKED_RING not RING_PACKED
+
+/*
+ * This feature indicates that all buffers are used by the device
+ * in the same order in which they have been made available.
+ */
+#define VIRTIO_F_IN_ORDER 35
+
+/*
+ * This feature indicates that drivers pass extra data (besides
+ * identifying the Virtqueue) in their device notifications.
+ */
+#define VIRTIO_F_NOTIFICATION_DATA 36
+
#endif /* _UAPI_LINUX_VIRTIO_CONFIG_H */
diff --git a/include/uapi/linux/virtio_ring.h b/include/uapi/linux/virtio_ring.h
index 6d5d5faa989b..77b1d4aeef72 100644
--- a/include/uapi/linux/virtio_ring.h
+++ b/include/uapi/linux/virtio_ring.h
@@ -44,6 +44,9 @@
/* This means the buffer contains a list of buffer descriptors. */
#define VRING_DESC_F_INDIRECT 4
+#define VRING_DESC_F_AVAIL(b) ((b) << 7)
+#define VRING_DESC_F_USED(b) ((b) << 15)
+
/* The Host uses this in used->flags to advise the Guest: don't kick me when
* you add a buffer. It's unreliable, so it's simply an optimization. Guest
* will still kick if it's out of buffers. */
@@ -104,6 +107,36 @@ struct vring {
struct vring_used *used;
};
+struct vring_packed_desc_event {
+ /* Descriptor Event Offset */
+ __virtio16 desc_event_off : 15,
+ /* Descriptor Event Wrap Counter */
+ desc_event_wrap : 1;
+ /* Descriptor Event Flags */
+ __virtio16 desc_event_flags : 2;
+};
Where would the virtqueue number go in driver notifications?
regards,
Jens
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