中文社区论区请教：ARM TRUSTZONE架构SOC内的AXI总线上的外设（如NFC），REE和TEE是否都可访问？（无法设置成由TEE专用？）谢谢。

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请教：ARM TRUSTZONE架构SOC内的AXI总线上的外设（如NFC），REE和TEE是否都可访问？（无法设置成由TEE专用？）谢谢。

MTS over 6 years ago

同上

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0 Yuping Luo over 6 years ago in reply to MTS

Q1: REE和TEE都是跑在cpu上面的，能否发出secure，或者non-secure的transaction取决与当前它运行的world（比如ARMv8.0 secure world: EL3, secure EL1/EL0, non-secure world: EL2, non-secure EL1/0 和 memory ( NS=1 or 0)配置属性。 REE (Linux) 应该是不能访问secure memory region）

Q2:REE运行在non-secure world，设置NS=0, 会被CPU当作non-secure的memory access，即AxPROT[1]=1
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0 Yuping Luo over 6 years ago in reply to MTS

Q1: REE和TEE都是跑在cpu上面的，能否发出secure，或者non-secure的transaction取决与当前它运行的world（比如ARMv8.0 secure world: EL3, secure EL1/EL0, non-secure world: EL2, non-secure EL1/0 和 memory ( NS=1 or 0)配置属性。 REE (Linux) 应该是不能访问secure memory region）

Q2:REE运行在non-secure world，设置NS=0, 会被CPU当作non-secure的memory access，即AxPROT[1]=1
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