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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。
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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
Top replies
Yuping Luo
over 6 years ago
in reply to
MTS
+2
verified
可以参考一下回复你的另外的帖子。 软件没法看到AXI 的hardware transaction。 它只能看到指令执行的结果。
MTS
over 6 years ago
+1
verified
请教下面理解是否正确:AXI上的从设备(如SE)具有AR/AWPORT1信号解析模块,因此,通过SE软件设计可分辨是REE访问还是TEE访问?并因此可使SE由TEE专用?(REE可访问SE,但SE软件设计可根据AR/AWPORT1信号状态,实现拒绝REE访问?) 谢谢。
Yuping Luo
over 6 years ago
in reply to
MTS
+1
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...
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+1
Yuping Luo
over 6 years ago
in reply to
MTS
可以参考一下回复你的另外的帖子。
软件没法看到AXI 的hardware transaction。 它只能看到指令执行的结果。
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+1
Yuping Luo
over 6 years ago
in reply to
MTS
可以参考一下回复你的另外的帖子。
软件没法看到AXI 的hardware transaction。 它只能看到指令执行的结果。
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