问题描述
只想问一下,关于AXI总线交易,安全交易和非安全交易之间有什么区别?
Just wanted to ask, what is the difference between secure and non-secure transactions when it comes to AXI bus transactions?
这两项交易对性能有何影响?
What are the performance implications of either transaction?
推荐答案
受信任的事务是ARM的TrustZone策略的一部分.它需要一个附加的插针来指示安全连接.它仅允许与处理器的安全部分进行通信.这是一种软件解决方案,用于在操作系统上进行root用户访问时限制对硬件的访问.如果黑客控制了操作系统,它将充当防火墙. 它不能防止硬件被黑客入侵.
Trusted transactions are a part of ARM's TrustZone policy. It requires an additional pin to indicate a secure connection. It only allows communication with the secure section of the processor. It is a software solution to restrict access to hardware in the case of root access on the OS. It acts as a firewall in the event a hacker takes control of the OS. It does not guard against hardware hacking.
就性能而言,硬件带宽不受影响,但是安全处理器中的额外步骤确实会导致性能下降.
As far a performance, the hardware bandwidth is unaffected, but the extra step in the secure processor does incur a performance penalty.
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