Hi Leif, I think I got it. Thank you very much.
-----Original Message----- From: Leif Lindholm [mailto:leif.lindh...@linaro.org] Sent: 2014-5-1 (星期四) 19:32 To: Kelvin K. Li Cc: linaro-dev@lists.linaro.org Subject: Re: 答复: why is the the smp_mb() in arm64's barrier.h "dmb ish"? On Thu, May 01, 2014 at 06:49:44PM +0800, kelvin...@via-alliance.com wrote: > Another questions: > > In Arm V8 Architecture Reference Manual，there is an example (see beblow) to > explain the shareability attribute of clusters. It is easy to know: each > cluster is corresponding to a Inner shareable domain; the two cluster > comprise a Outer shareable domain. The ARM ARM describes the architectural requirements for a system to be able to work correctly. Specific implementations can add further abilities within the scope of this. And Linux can then have additional requirements for how to enable SMP/HMP.. > So, how does the big.LITTLE HMP system treat two clusters as a Inner > shareable domain？ Example for Cortex-A53: http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0500d/ch07s02s02.html Regards, Leif
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