TEE_SHM_DMA_BUF
if (shm->flags & TEE_SHM_DMA_BUF) {
ref->shm.flags = TEE_SHM_DMA_BUF;
} else if (shm->flags & TEE_SHM_DMA_BUF) {
if (shm->flags & TEE_SHM_DMA_BUF)