DIAG308_VMPARM_SIZE
ipl_block.ccw.vm_parm, DIAG308_VMPARM_SIZE);
char parm[DIAG308_VMPARM_SIZE + 1] = {};
char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
memset(ipb->ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);