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-rw-r--r--hw/virtio-blk.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c
index 2630b99304..e6df9f2619 100644
--- a/hw/virtio-blk.c
+++ b/hw/virtio-blk.c
@@ -444,6 +444,9 @@ static uint32_t virtio_blk_get_features(VirtIODevice *vdev)
 #endif
     if (strcmp(s->serial_str, "0"))
         features |= 1 << VIRTIO_BLK_F_IDENTIFY;
+    
+    if (bdrv_is_read_only(s->bs))
+        features |= 1 << VIRTIO_BLK_F_RO;
 
     return features;
 }