RVU_PF_VF_BAR4_ADDR
vfpf_mbox_base = readq(cptpf->reg_base + RVU_PF_VF_BAR4_ADDR);
bar4 = rvupf_read64(rvu, RVU_PF_VF_BAR4_ADDR);
base = readq(pf->reg_base + RVU_PF_VF_BAR4_ADDR);