[PATCH v9 0/7] x86/hygon: Add Family 0x18 DF node enumeration and SMN access

[Lin Wang]

v9 fixes the SMN root-array leak reported by Sashiko. Each DF node now
holds its own PCI reference to its SMN root, so the temporary root table
can be freed after setup. Config-space reservations are retained on
success and released on failure.

The scope is unchanged. The series adds Hygon Data Fabric (DF) node
enumeration and SMN access. AMD NB/SMN initialization and EDAC/ATL
matching are restricted to AMD CPUs. Hygon EDAC and ATL support will
be submitted separately.

Tested v9 on a Family 0x18 Model 0x07 system with 2 sockets, 12 Core
and DDR Dies (CDDs) and 4 I/O Dies (IODs).

Changes in v9:

  - Free the temporary SMN root table and cache selected roots in the
    DF nodes instead of a separate array. (Sashiko)
  - Drop Reviewed-by from patch 7 because its root ownership changed.
  - Rebase onto mainline with the k10temp Hygon removal included.

Link: https://sashiko.dev/#/patchset/20261022074218.667049-1-wanglin%40open-hieco.net # Sashiko v8 review
Link: https://lore.kernel.org/20261009090111.151878-1-wanglin@xxxxxxxxxxxxxx # v7
Link: https://lore.kernel.org/20261022074218.667049-1-wanglin@xxxxxxxxxxxxxx # v8

Lin Wang (7):
  x86/hygon: Add Family 0x18 DF node enumeration
  x86/hygon: Map CPU NodeIds to DF nodes
  EDAC/amd64: Stop matching Hygon CPUs
  RAS/AMD/ATL: Match AMD CPUs only
  x86/amd_nb: Restrict the northbridge framework to AMD CPUs
  x86/amd_node: Restrict SMN setup to AMD CPUs
  x86/hygon: Add Family 0x18 SMN access

 MAINTAINERS                       |   7 +
 arch/x86/Kconfig                  |   4 +
 arch/x86/include/asm/hygon/node.h |  41 ++
 arch/x86/kernel/Makefile          |   1 +
 arch/x86/kernel/amd_nb.c          |   6 +-
 arch/x86/kernel/amd_node.c        |   6 +-
 arch/x86/kernel/hygon_node.c      | 851 ++++++++++++++++++++++++++++++
 drivers/edac/amd64_edac.c         |   4 -
 drivers/ras/amd/atl/core.c        |   9 +-
 9 files changed, 914 insertions(+), 15 deletions(-)
 create mode 100644 arch/x86/include/asm/hygon/node.h
 create mode 100644 arch/x86/kernel/hygon_node.c

base-commit: c339f4010dea8b0d754f84ace70cd1b089878ef8
-- 
2.43.0