diff --git a/devicemodel/hw/pci/virtio/virtio_rpmb.c b/devicemodel/hw/pci/virtio/virtio_rpmb.c
index 65ca48af4..c92f19d62 100644
--- a/devicemodel/hw/pci/virtio/virtio_rpmb.c
+++ b/devicemodel/hw/pci/virtio/virtio_rpmb.c
@@ -390,100 +390,6 @@ rpmb_get_counter(__u8 mode, __u8 *key, __u32 *counter, __u16 *result)
 	return rc;
 }
 
-/* TODO: this function will be used for AttKB */
-#if 0
-static int
-rpmb_write_block(__u8 mode, __u8 *key, __u16 addr, void *buf, __u32 count)
-{
-	int rc;
-	int fd;
-	__u32 i;
-	__u32 write_counter;
-	__u16 result;
-	struct {
-		struct rpmb_ioc_seq_cmd h;
-		struct rpmb_ioc_cmd cmd[3];
-	} iseq = {};
-	struct rpmb_frame frame_write;
-	struct rpmb_frame frame_rel[count];
-	struct rpmb_frame frame_read;
-
-	if (!buf || count == 0) {
-		DPRINTF(("%s:buf or count is invalid!\n", __func__));
-		return -1;
-	}
-
-	rc = rpmb_get_counter(mode, key, &write_counter, &result);
-	if (rc) {
-		DPRINTF(("%s: virtio_rpmb_get_counter failed\n", __func__));
-		return -1;
-	}
-
-	/*fill write frame*/
-	frame_write.addr = swap16(addr);
-	frame_write.req_resp = swap16(RPMB_REQ_RESULT_READ);
-	frame_write.write_counter = swap32(write_counter);
-
-	/*fill rel write frame*/
-	for (i = 0; i < count; i++) {
-		memset(&frame_rel[i], 0, sizeof(frame_rel[i]));
-		memcpy(frame_rel[i].data, buf + i * sizeof(frame_rel[i].data), sizeof(frame_rel[i].data));
-		frame_rel[i].write_counter = swap32(write_counter);
-		frame_rel[i].addr = swap16(addr);
-		frame_rel[i].block_count = swap16(count);
-		frame_rel[i].req_resp = swap16(RPMB_REQ_DATA_WRITE);
-	}
-
-	/*generate rel frame mac*/
-	if (rpmb_mac(key, frame_rel, count, frame_rel[count - 1].key_mac)) {
-		DPRINTF(("%s: rel frame rpmb mac failed\n", __func__));
-		return -1;
-	}
-
-	/*fill io cmd*/
-	iseq.cmd[0].flags = RPMB_F_WRITE | RPMB_F_REL_WRITE;
-	iseq.cmd[0].nframes = count;
-	iseq.cmd[0].frames_ptr = (__aligned_u64)(intptr_t)(frame_rel);
-	iseq.cmd[1].flags = RPMB_F_WRITE;
-	iseq.cmd[1].nframes = 1;
-	iseq.cmd[1].frames_ptr = (__aligned_u64)(intptr_t)(&frame_write);
-	iseq.cmd[2].flags = 0;
-	iseq.cmd[2].nframes = 1;
-	iseq.cmd[2].frames_ptr = (__aligned_u64)(intptr_t)(&frame_read);
-	iseq.h.num_of_cmds = 3;
-
-	if (mode == RPMB_PHY_MODE) {
-		/* open rpmb device.*/
-		fd = open(RPMB_PHY_PATH_NAME, O_RDWR | O_NONBLOCK);
-		if (fd < 0) {
-			DPRINTF(("failed to open %s for read blocks.\n", RPMB_PHY_PATH_NAME));
-			return fd;
-		}
-
-		/* send ioctl cmd.*/
-		rc = ioctl(fd, RPMB_IOC_SEQ_CMD, &iseq);
-
-		/* close rpmb device.*/
-		close(fd);
-
-		if (rc) {
-			DPRINTF(("read blocks for physical rpmb failed.\n"));
-			return rc;
-		}
-	} else {
-		rc = rpmb_sim_send(&iseq);
-		if (rc) {
-			DPRINTF(("read blocks for simulated rpmb failed.\n"));
-			return rc;
-		}
-	}
-
-	rc = rpmb_check_response("write blocks", RPMB_RESP_DATA_WRITE,
-							&frame_read, 1, key, NULL, &addr);
-	return rc;
-}
-#endif
-
 static int
 rpmb_read_block(__u8 mode, __u8 *key, __u16 addr, void *buf, __u32 count)
 {