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arm64: kernel: numa: fix ACPI boot cpu numa node mapping

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Commit 7ba5f605f3 ("arm64/numa: remove the limitation that cpu0 must
bind to node0") removed the numa cpu<->node mapping restriction whereby
logical cpu 0 always corresponds to numa node 0; removing the
restriction was correct, in that it does not really exist in practice
but the commit only updated the early mapping of logical cpu 0 to its
real numa node for the DT boot path, missing the ACPI one, leading to
boot failures on ACPI systems owing to missing node<->cpu map for
logical cpu 0.

Fix the issue by updating the ACPI boot path with code that carries out
the early cpu<->node mapping also for the boot cpu (ie cpu 0), mirroring
what is currently done in the DT boot path.

Fixes: 7ba5f605f3 ("arm64/numa: remove the limitation that cpu0 must bind to node0")
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Tested-by: Laszlo Ersek <[email protected]>
Reported-by: Laszlo Ersek <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Laszlo Ersek <[email protected]>
Cc: Hanjun Guo <[email protected]>
Cc: Andrew Jones <[email protected]>
Cc: Zhen Lei <[email protected]>
Cc: Catalin Marinas <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
This commit is contained in:
Lorenzo Pieralisi 2016-10-17 15:18:48 +01:00 • committed by Will Deacon
commit baa5567c18
1 changed files with 1 additions and 0 deletions
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1
arch/arm64/kernel/smp.c
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@ -544,6 +544,7 @@ acpi_map_gic_cpu_interface(struct acpi_madt_generic_interrupt *processor)
return;
}
bootcpu_valid = true;
early_map_cpu_to_node(0, acpi_numa_get_nid(0, hwid));
return;
}