Hi,

I have tried this before, there is  a problem. 
on Armv8, when MMU  disabled, the default attribute of memory is device, and device memory access has alignment requirements. For example, accessing address (0x1) will result in fault.

Ben via TF-A <tf-a@lists.trustedfirmware.org> 于2022年7月19日周二 17:02写道：
Hello,

To decrease feature in BL1, I plan to disable MMU in BL1 stage. 
Are there any potential issues besides performance issues?

BRs

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