ACPI_GICV5_ITS_MEM_SIZE
res.end = its_frame->base_address + ACPI_GICV5_ITS_MEM_SIZE - 1;
res.end = its_entry->base_address + ACPI_GICV5_ITS_MEM_SIZE - 1;
its_base = ioremap(res.start, ACPI_GICV5_ITS_MEM_SIZE);