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Instruction Fetches from Peripheral Memory Space

Is it possible to use the MPU to configure the Peripheral Memory Space as Execute?

It looks possible via the MPU_RBAR.XN bit.

If this is the case, is it fair to say that TrustZone aware select gates need to monitor HPROT[0] or PPROT[2] and block the transaction if it is an instruction fetch?

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  • Hi

    could you possibly elaborate on what you are trying to protect from?

    is the scenario that someone configure peripheral space as executable then jumps to that code to bypass secure/non secure?

    thanks 

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  • Hi

    could you possibly elaborate on what you are trying to protect from?

    is the scenario that someone configure peripheral space as executable then jumps to that code to bypass secure/non secure?

    thanks 

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