static uint32_t virtio_blk_get_features(VirtIODevice *vdev, uint32_t features) { VirtIOBlock *s = to_virtio_blk(vdev); features |= (1 << VIRTIO_BLK_F_SEG_MAX); features |= (1 << VIRTIO_BLK_F_GEOMETRY); features |= (1 << VIRTIO_BLK_F_TOPOLOGY); features |= (1 << VIRTIO_BLK_F_BLK_SIZE); features |= (1 << VIRTIO_BLK_F_SCSI); features |= (1 << VIRTIO_BLK_F_CONFIG_WCE); if (bdrv_enable_write_cache(s->bs)) features |= (1 << VIRTIO_BLK_F_WCE); if (bdrv_is_read_only(s->bs)) features |= 1 << VIRTIO_BLK_F_RO; return features; }