HOST_FFA_ID
.a1 = HOST_FFA_ID,
.a4 = HOST_FFA_ID,
if (id != HOST_FFA_ID) {
if (!offset || buf->ep_count != 1 || buf->sender_id != HOST_FFA_ID) {
.sender_id = HOST_FFA_ID,
if (res.a2 != HOST_FFA_ID)