On Wed, Mar 04, 2020 at 04:38:21PM +0100, Jean-Philippe Brucker wrote: > I agree with this. The problem is I don't know how to get a new ACPI table > or change an existing one. It needs to go through the UEFI forum in order > to be accepted, and I don't have any weight there. I've been trying to get > the tiny change into IORT for ages. I haven't been given any convincing > reason against it or offered any alternative, it's just stalled. The > topology description introduced here wasn't my first choice either but > unless someone can help finding another way into ACPI, I don't have a > better idea. A quote from the ACPI Specification (Version 6.3, Section 5.2.6, Page 119): Table signatures will be reserved by the ACPI promoters and posted independently of this specification in ACPI errata and clarification documents on the ACPI web site. Requests to reserve a 4-byte alphanumeric table signature should be sent to the email address info@xxxxxxxxx and should include the purpose of the table and reference URL to a document that describes the table format. Tables defined outside of the ACPI specification may define data value encodings in either little endian or big endian format. For the purpose of clarity, external table definition documents should include the endian-ness of their data value encodings. So it sounds like you need to specifiy the table format and send a request to info@xxxxxxxxx to get a table signature for it. Regards, Joerg
