Hi,
On 06/06/2017 03:57 PM, Abhishek Kumar wrote:
> Hello
> I am using genode trustzone code on imx53 board. AFAIU, following lines
> in csu_config.h are supposed to regulate the access from normal world:
>
> ```
> namespace Csu_config
> {
> enum {
> SECURE_GPIO = 1,
> SECURE_ESDHC = 0,
> SECURE_UART = 0,
> SECURE_I2C = 1,
> };
> };
> ```
>
> Though GPIO is set secure, I am still able to set direction and value of
> gpios from the linux running in normal world, on top of tz_vmm running
> in secure world. Should it not raise some exception? Where am I going
> wrong?
I would assume it to silently ignore your settings, as the GPIO driver's
register access is just uncommented. Have a look here:
https://github.com/skalk/linux/commit/eccce1c595d7962c95086d6fa60291f7c2c1a497#diff-b66779fc74ad745e9385d5107cc44104
Are you sure that GIO settings are really changed?
Regards
Stefan
>
> Thanks
> Abhishek
>
>
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