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x86/of: Map NUMA node to CPUs as per DeviceTree

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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
This commit is contained in:
Saurabh Sengar 2024-04-02 07:40:29 -07:00 committed by Ingo Molnar
parent 222408cde4
commit 85900d0618
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kernel/devicetree.c
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@ -24,6 +24,7 @@
#include <asm/pci_x86.h>
#include <asm/setup.h>
#include <asm/i8259.h>
#include <asm/numa.h>
#include <asm/prom.h>
__initdata u64 initial_dtb;
@ -137,6 +138,7 @@ static void __init dtb_cpu_setup(void)
continue;
}
topology_register_apic(apic_id, CPU_ACPIID_INVALID, true);
set_apicid_to_node(apic_id, of_node_to_nid(dn));
}
}