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How Does the Secure World Work with Multicore System?

Hi experts,

 

From my experience, for the single-core architecture, once we enter the secure world, the normal world would be paused. However, I'm not sure how does secure world is scheduled for the multicore system? 

Do we still have to pause the normal world or we can make two worlds run at the same time? Is there any material about this area?

 

P.S.: Before the community change the website, I bookmarked a page: https://community.arm.com/thread/7987. The title is "How to schedule Secure/Normal kernels in TrustZone..". I remember this post described the current work in the area while right now the page is unavailable so I have to ask again for help.

 

Thank you.

 

Simon