kvm: Make virtio block device read-only

Signed-off-by: Pekka Enberg <penberg@kernel.org>

diff --git a/tools/kvm/blk-virtio.c b/tools/kvm/blk-virtio.c
index c484ca243813578ded4acac09793d3e711caa41e..9b7190e1c508b755e1210e4f6bfe803da2d9ebcc 100644 (file)
--- a/tools/kvm/blk-virtio.c
+++ b/tools/kvm/blk-virtio.c
@@ -33,6 +33,7 @@ static struct device device = {
                .blk_size               = 4096,
        },
        .host_features          = (1UL << VIRTIO_BLK_F_GEOMETRY)
+                               | (1UL << VIRTIO_BLK_F_RO)
                                | (1UL << VIRTIO_BLK_F_BLK_SIZE),
 };