summaryrefslogtreecommitdiffstats
path: root/Documentation/admin-guide/RAS/address-translation.rst
blob: f0ca17b43cd3de7699349104b0219b3b883f1117 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
.. 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