Hi Ben, I am sorry to disturb you for consulting you a question, my question is how I can make CXL HDM 1G-size alignment, CXL specification defines HDM is 256M alignment. >From my understanding, BIOS will allocate HPA and build ACPI SRAT for CXL HDM, do we have any method to tell OS or BIOS to align HDM with 1G size? I don't sure whether we can configure BIOS address allocation, but hope any your suggestion and help! Thanks, David