Develop Trustzone support for imx6

[chirag garg]

Hello Thong

On Tue, Apr 28, 2015 at 7:31 AM, thong <thong at ...323...> wrote:

> Hi Martin Stein,
> Thank you very much for your kind help! It was very useful for me and
> after I found some differences about UART configuration and corrected
> it, I was able to see log messages about starting tz_vmm on Serial
> Terminal.
>
> Hi Chirag Garg,
> Thanks for your great work! It was very good starting point for me. I
> have tried your Normal world OS at
>
> https://github.com/chiragdthinker/Genode_Binaries/
>
> but what is output result to know your tz_vmm run successfully? Does it
> launch graphical GUI on touch screen or what log message on Serial
> Terminal?
> In my try, it ended with a log message:
>
> [init -> tz_vmm] SUPERVISOR CALL ..
>
> It is a successful execution of tz_vmm. Normal OS binary located at the
above mentioned link is just a simple Genode kernel image which execute the
SMC call in higher privilege mode  in normal world which transfer the
control back to the secure world at line 98.

https://github.com/iitmadras/genode/blob/hw_sabrelite_tz_support/repos/os/src/server/tz_vmm/imx6/main.cc#L98

Where it prints the "SUPERVISOR CALL .." log message after that it goes to
_handle_hypervisor_call() located in the same file where it does nothing as
of now depending on register r0 status and stops there. For more clarity
you can see the following file to understand the flow.

https://github.com/iitmadras/genode/blob/hw_sabrelite_tz_support/repos/os/src/server/tz_vmm/imx6/main.cc

If it has problem, please help me where should I take a look to solve.
>
> Thank you very much and Best Regards,
> --Thong Nguyen.
>
> On 4/21/2015 8:24 PM, Martin Stein wrote:
> > Hi Thong,
> >
> > On 21.04.2015 12:57, thong wrote:
> >> Is that my board MX6Q SABRESD differs from SABRELITE causing this?
> >> Please help me what I should do.
> > Of course, this might be a problem. I'd suggest you to check the UART
> > and the RAM configuration of Genode. For Sabrelite, both can be found in
> > [1]. Maybe you're simply listening at another UART port.
> >
> > If you find differences, you should add a new platform 'hw_sabresd_tz'.
> > What to do for that can be easily found by doing:
> >
> > find $GENODE_DIR/repos/ $GENODE_DIR/tool/ -wholename *sabrelite*
> > grep -ri "sabrelite" $GENODE_DIR/repos/ $GENODE_DIR/tool/
> >
> > The new platform should make use of the less specific imx6 sources like
> > it's done in the sabrelite sources.
> >
> > Cheers,
> > Martin
> >
> > [1]
> $GENODE_DIR/repos/base/include/platform/sabrelite/drivers/board_base.h
>
> Regards
>
> Chirag Garg
> IIT Madras , Rise Lab
>
>
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