auto_update

sisyphus1212 · Jul 23, 2024 · 1d678a0 · 1d678a0
1 parent 1a38293
commit 1d678a0
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/虚拟化/virtio.md b/虚拟化/virtio.md
@@ -33,4 +33,11 @@ avail == used && used == vq->vq_packed.used_wrap_counter;
 avail_wrap_counter ==  1 -> a 1 u 0
 avail_wrap_counter ==  0 -> a 0 u 1
 
+if (vq->used_wrap_counter) {
+    flags |= VRING_DESC_F_USED;
+    flags |= VRING_DESC_F_AVAIL;
+} else {
+    flags &= ~VRING_DESC_F_USED;
+    flags &= ~VRING_DESC_F_AVAIL;
+}