x86/of: Map NUMA node to CPUs as per DeviceTree
authorSaurabh Sengar <ssengar@linux.microsoft.com>
Tue, 2 Apr 2024 14:40:29 +0000 (07:40 -0700)
committerIngo Molnar <mingo@kernel.org>
Wed, 3 Apr 2024 06:49:15 +0000 (08:49 +0200)
commit85900d061884de85f557a06cf56ff69dfae07e26
tree172d331c487e5ca2f79be849db1430686edc09bd
parent222408cde4d0ab17e54d4db26751c2b5cab9ac2b
x86/of: Map NUMA node to CPUs as per DeviceTree

Currently for DeviceTree bootup, x86 code does the default mapping of
CPUs to NUMA, which is wrong. This can cause incorrect mapping and WARNs
on SMT enabled systems:

  CPU #1's smt-sibling CPU #0 is not on the same node! [node: 1 != 0]. Ignoring dependency.
  WARNING: CPU: 1 PID: 0 at topology_sane.isra.0+0x5c/0x6d
  match_smt+0xf6/0xfc
  set_cpu_sibling_map.cold+0x24f/0x512
  start_secondary+0x5c/0x110

Call the set_apicid_to_node() function in dtb_cpu_setup() for setting
the NUMA to CPU mapping for DeviceTree platforms.

Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/1712068830-4513-4-git-send-email-ssengar@linux.microsoft.com
arch/x86/kernel/devicetree.c