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Address translation

Documentation/admin-guide/RAS/address-translation.rst

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.. SPDX-License-Identifier: GPL-2.0

Address translation

x86 AMD

Zen-based AMD systems include a Data Fabric that manages the layout of physical memory. Devices attached to the Fabric, like memory controllers, I/O, etc., may not have a complete view of the system physical memory map. These devices may provide a "normalized", i.e. device physical, address when reporting memory errors. Normalized addresses must be translated to a system physical address for the kernel to action on the memory.

AMD Address Translation Library (CONFIG_AMD_ATL) provides translation for this case.

Glossary of acronyms used in address translation for Zen-based systems

  • CCM = Cache Coherent Moderator
  • COD = Cluster-on-Die
  • COH_ST = Coherent Station
  • DF = Data Fabric