| From | Arnd Bergmann <> | Subject | Re: [PATCH v3 15/31] arm64: SMP support | Date | Fri, 7 Sep 2012 19:39:45 +0000 |
| |
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@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> > Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
|