• Linux 7.0 CXL Enables AMD Zen 5 Address Translation Feature A long-in-development feature for AMD EPYC Zen 5 server platforms now merged for the Linux 7.0 kernel is ACPI PRMT-based address translation for the Compute Express Link (CXL) subsystem. • After going through ten rounds of code review the past number of months, this AMD Zen 5 platform feature is now upstream in the mainline Linux kernel. • It’s explained in one of the kernel patches as: There is also a separate documentation patch that itself was through five rounds of review. • This documentation covers ACPI PRM CXL Address Translation in more detail. • This ACPI Platform Runtime Mechanism (PRM) / Platform Runtime Mechanism Table (PRMT) debuted with AMD EPYC 9005 series but will presumably continue to be built upon in next-gen EPYC Zen 6 platforms too. • So while it’s late in arriving in the mainline kernel, at least it’s here now and ready for the future.
Article Summaries:
- Linux 7.0 CXL Enables AMD Zen 5 Address Translation Feature A long-in-development feature for AMD EPYC Zen 5 server platforms now merged for the Linux 7.0 kernel is ACPI PRMT-based address translation for the Compute Express Link (CXL) subsystem. After going through ten rounds of code review the past number of months, this AMD Zen 5 platform feature is now upstream in the mainline Linux kernel. It’s explained in one of the kernel patches as: There is also a separate documentation patch that itself was through five rounds of review. This documentation covers ACPI PRM CXL Address Translation in
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