STM32MP135FAE7 TZC400 tzc_it_handler:72 TZC permission failure

[lebeer]

1、Part Number：STM32MP135FAE7 

2、tzc_it_handler:72 TZC permission failure

3、Environment：PC：ubuntu18，environment-setup-cortexa7t2hf-neon-vfpv4-ostl-linux-gnueabi，arm-ostl-linux-gnueabi

4、We designed a STM32MP135 based SOM, using the ST I2C PMIC, STPMIC1D，1GiB DDR3L。

5、At present, after the modification of TF-A,OP-TEE device tree, TZC panic occurred when downloading, now check U-boot device tree, I do not know where to find the cause.

6、Attached is the log printed by uart4 debug

[Gregory PLANCHON]

Hi, 

 

It seems that the problem comes from a configuration issue. The region is configured as secure, as can be seen here :

 

D/TC:0 0 tzc_dump_state:476 region_base: 0x00000000fe200000
D/TC:0 0 tzc_dump_state:479 region_top: 0x00000000ffffffff
D/TC:0 0 tzc_dump_state:481 secure rw: TZC_REGION_S_RDWR

 

You need to check the TF-A dt to make sure there are no configuration issue.
Normally, you should look at this part:

st-mem-firewall {

       compatible = "st,mem-firewall";

       memory-ranges = <

             0xc0000000 0x20000000 TZC_REGION_S_RDWR 0>;

};

 

Regards,

Grégory