OPAL_SET_XIVE
error = opal_call(OPAL_SET_XIVE, irq, cpu << 2, XICP_PRIORITY);
status = opal_call(OPAL_SET_XIVE, irq, cpu << 2, XICP_PRIORITY);
opal_call(OPAL_SET_XIVE, irq, ivec->cpu << 2, 0xff);
opal_call(OPAL_SET_XIVE, irq, ivec->cpu << 2, XICP_PRIORITY);