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Message-Id: <201209071939.45799.arnd@arndb.de> Date: Fri, 7 Sep 2012 19:39:45 +0000 From: Arnd Bergmann <arnd@...db.de> To: Catalin Marinas <catalin.marinas@....com> Cc: linux-arch@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v3 15/31] arm64: SMP support On Friday 07 September 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@....com> > Signed-off-by: Marc Zyngier <marc.zyngier@....com> > Signed-off-by: Catalin Marinas <catalin.marinas@....com> > Acked-by: Arnd Bergmann <arnd@...db.de> > Acked-by: Tony Lindgren <tony@...mide.com> Acked-by: Arnd Bergmann <arnd@...db.de> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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