SPDX-License Identifier: CC-BY-4.0
- Sponsor: Vishal Verma, Intel
- Creators/Contributors:
- Chet Douglas, Intel
- Ben Widawsky, Intel
- Dan Williams, Intel
- Vishal Verma, Intel
Add “Compute Express Link Root Object” enumeration value to the ACPI Device IDs Table (5.160).
Compute Express Link (CXL) is a new high-speed CPU-to-Device and CPU-to- Memory interconnect. The new ACPI Device ID represents a singleton device that allows the OSPM to trigger the enumeration of the CXL.mem address space, and indicates the presence of cross Host Bridge (ACPI0016) interleaved CXL.mem resources.
One new row added to the ACPI Device IDs table (5.160).
- Compute Express Link Specification v2.0, https://www.computeexpresslink.org/
Add “Compute Express Link Root Object” enumeration device
Most device objects are controlled through generic objects and ...
Table 5.160 ACPI Device IDs
| Value | Description |
|---|---|
| .. | .. |
| ACPI0017 | Compute Express Link Root Object: This device represents the root of a CXL capable device hierarchy. It shall be present whenever the platform allows OSPM to dynamically assign CXL endpoints to a platform address space. |