Hi experts,

From my experience, for the single-core architecture, once we enter the secure world, the normal world would be paused. However, I'm not sure how does secure world is scheduled for the multicore system? 

Do we still have to pause the normal…

Hi experts,

Recently I want to conduct one secure-related scanning in TrustZone for some NS kernel memory.

To do this, I need at first reporting the PA of the memory from NS kernel. My idea is developing a kernel module to achieve the goal.

I write the 

Hi experts,

I'm wondering do you compile the OPTEE_OS in this instruction as arm32 or AArch64? In which script do you set the compiler for the secure OS? ( I checked the file build-optee-os.sh while I find the file exports both compilers so I'm not…

Root of Trust implementation – Connected devices with authentication requirements need a root of trust in the system architecture. This is particularly important for devices that can be updated over the air. In a system with TrustZone technology, code…

Hi,

I am new to the ARM TrustZone Architecture.

I am confused that who sets the NS bit in the SCR register, is it the processor itself set bit to 1 when it enters the EL3 mode, or it is the Monitor mode code is setting the NS bit ?

Maybe I am asking…

From "ARM v8-M Architecture Reference Manual", about IDAU I see:

The IDAU can provide the following Security attribution information for an address:
• Security attribution exempt. This specifies that the address is exempt from security attribution…

Hi guys,

I found in armv8-arch ref manual that when PRIS bit in the AIRCR is set, the priority of non-secure handler is mapped to the bottom of the priority range. So I did an experiment.

I configured two exceptions, systick and svc. The priority are 2…

Hello All,

Requirements:

1. Write a secure program where some part of the program resides in a secure zone.
2. Code instrumentation: I would like to instrument the compiled binary that runs on the device 

I could find some options, however, I cannot differentiate…