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    SubjectRe: [PATCH v2 15/31] arm64: SMP support
    Date
    On Tuesday 14 August 2012, Catalin Marinas wrote:
    > This patch adds SMP initialisation and spinlocks implementation for
    > AArch64. The spinlock support uses the new load-acquire/store-release
    > instructions to avoid explicit barriers. The architecture also specifies
    > that an event is automatically generated when clearing the exclusive
    > monitor state to wake up processors in WFE, so there is no need for an
    > explicit DSB/SEV instruction sequence. The SEVL instruction is used to
    > set the exclusive monitor locally as there is no conditional WFE and a
    > branch is more expensive.
    >
    > For the SMP booting protocol, see Documentation/arm64/booting.txt.
    >
    > Signed-off-by: Will Deacon <will.deacon@arm.com>
    > Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
    > Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

    Acked-by: Arnd Bergmann <arnd@arndb.de>


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