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What will I get if I operate p15 to switch to TZ mode when I'm right in TZ mode.

As above~

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  • Hi Song,

    Thank u for replying.

    My question is that when my chip is running in secure mode (trustzone for ARM), and I operate the coprocessor (No.15) trying to switch the ARM mode to Trustzone, i.e.,  secure mode, will that lead to some kind of abort or exception, I'm doing this because I don't know which mode my chip is in.

    So I mean, does ARM core respond to such redundancy operates with some mechanisms to inform me that the chip is already in secure mode.

    Best Regards

    Jay

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  • Hi Song,

    Thank u for replying.

    My question is that when my chip is running in secure mode (trustzone for ARM), and I operate the coprocessor (No.15) trying to switch the ARM mode to Trustzone, i.e.,  secure mode, will that lead to some kind of abort or exception, I'm doing this because I don't know which mode my chip is in.

    So I mean, does ARM core respond to such redundancy operates with some mechanisms to inform me that the chip is already in secure mode.

    Best Regards

    Jay

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