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    arm64: topology: Implement basic CPU topology support · f6e763b9
    Mark Brown authored
    
    
    Add basic CPU topology support to arm64, based on the existing pre-v8
    code and some work done by Mark Hambleton.  This patch does not
    implement any topology discovery support since that should be based on
    information from firmware, it merely implements the scaffolding for
    integration of topology support in the architecture.
    
    No locking of the topology data is done since it is only modified during
    CPU bringup with external serialisation from the SMP code.
    
    The goal is to separate the architecture hookup for providing topology
    information from the DT parsing in order to ease review and avoid
    blocking the architecture code (which will be built on by other work)
    with the DT code review by providing something simple and basic.
    
    Following patches will implement support for interpreting topology
    information from MPIDR and for parsing the DT topology bindings for ARM,
    similar patches will be needed for ACPI.
    
    Signed-off-by: default avatarMark Brown <broonie@linaro.org>
    Acked-by: default avatarMark Rutland <mark.rutland@arm.com>
    [catalin.marinas@arm.com: removed CONFIG_CPU_TOPOLOGY, always on if SMP]
    Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
    f6e763b9