• Lorenzo Pieralisi's avatar
    arm64: kernel: numa: fix ACPI boot cpu numa node mapping · baa5567c
    Lorenzo Pieralisi authored
    Commit 7ba5f605 ("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: 7ba5f605 ("arm64/numa: remove the limitation that cpu0 must bind to node0")
    Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
    Tested-by: default avatarLaszlo Ersek <lersek@redhat.com>
    Reported-by: default avatarLaszlo Ersek <lersek@redhat.com>
    Cc: Will Deacon <will.deacon@arm.com>
    Cc: Laszlo Ersek <lersek@redhat.com>
    Cc: Hanjun Guo <hanjun.guo@linaro.org>
    Cc: Andrew Jones <drjones@redhat.com>
    Cc: Zhen Lei <thunder.leizhen@huawei.com>
    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
    baa5567c
smp.c 21.4 KB