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-rw-r--r--include/hw/virtio/virtio.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index 473fb75e28..0634c15ab0 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -25,6 +25,10 @@
 /* A guest should never accept this.  It implies negotiation is broken. */
 #define VIRTIO_F_BAD_FEATURE		30
 
+#define VIRTIO_LEGACY_FEATURES ((0x1ULL << VIRTIO_F_BAD_FEATURE) | \
+                                (0x1ULL << VIRTIO_F_NOTIFY_ON_EMPTY) | \
+                                (0x1ULL << VIRTIO_F_ANY_LAYOUT))
+
 struct VirtQueue;
 
 static inline hwaddr vring_align(hwaddr addr,