tz_vmm run script

[John David]

Hi Stefan,

thank you so much for your response.

On Mon, Feb 22, 2016 at 11:18 AM, Stefan Kalkowski <
stefan.kalkowski at ...1...> wrote:

> Hi John,
>
> sorry for my late response, I was in holidays.
>
> On 02/13/2016 12:54 AM, John David wrote:
> > Hi Stefan,
> >
> > Thanks a lot.
> >
> > I have tried to configure and run the tz_vmm example according to your
> > explanation, but only the Linux penguin is displayed on left corner of
> the
> > LVDS display kit and then it hangs.
>
> Ok, that means Linux succeeds in using the LVDS display. When you write:
> "it hangs" do you get any message from the Genode side, e.g. a VM
> exception dump?


no VM exception dump if i disable the serial port (CONFIG_SERIAL_MXC and
CONFIG_SERIAL_MXC_CONSOLE) in the Linux configuration file. FYI, i use
imx53_android_deconfig in /arch/arm/configs for building the Linux kernel.



> Otherwise you need to inspect the Linux kernel messages,
> did you enabled earlyprintk, and removed the serial console redirection
> of the kernel messages within the kernel commandline parameters?
>

I changed the kernel commandline parameters  to *"video=mxcdi0fb:RGB666,XGA
earlyprintk di0_primary ldb=di0*" and also enable early_printk
(CONFIG_EARLY_PRINTK=y ), but it still displays the Linux penguin logo on
top left conner of the LVDS display, and hangs. Do i still miss something?
Would you please let me know?  However, If i set the UART device as
UNSECURED and enable the the serial port in the configuration file, the
Linux boots properly without an error and i get a shell in the serial
console.


>
> regards stefan
>

BTW, is it possible to run the guest OS unmodified in the normal world
while Genode in the secure world using this 'tz_vmm' run example? i have a
prebuilt Android/Linux uImage for imx53 QSB from the www.freeescale.com. Is
it possible to run this uImage if i put it manually in place of Linux
uImage in Genode build directory? if not, how do i modify if i get the
source code?  Do you have any other experiment for ARM TrustZone on imx53
QSB?

Thanks!


> > As you mentioned, I removed the last
> > four patches from this branch (
> > https://github.com/skalk/linux/commits/imx53-tz) and re-compiled the
> Linux
> > kernel. I also changed the kernel cmdline argument value in
> > genode/os/src/server/tz_vmm/imx53/main.cc file to
> *console=ttymxc0,115200
> > gpu_nommu video=mxcdi0fb:RGB666,XGA di0_primary ldb=di0*. I wonder if you
> > could tell me what is missing?
> >
> > Thanks!
> >
> >
> >
> > On Wed, Feb 10, 2016 at 2:52 PM, Stefan Kalkowski <
> > stefan.kalkowski at ...1...> wrote:
> >
> >> Hi John,
> >>
> >> On 02/03/2016 10:51 PM, John David wrote:
> >>> Hi all,
> >>>
> >>> I am running  tz_vmm run script on i.mx53qsb. I have LVDS display kit
> >>> attached to the board. I want the Linux (non secure world) to be
> >> displayed
> >>> on the LVDS while the Genode uses the serial console. I wonder if you
> >> could
> >>> tell me how can i do this.
> >>>
> >>
> >> You have to adjust the partitioning of the devices btween secure world
> >> (Genode) and non-secure world (Linux). This is primarily done via the
> >> CSU (Central Security Unit) of this Freescale SoC. You can find the
> >> relevant configuration hardcoded within:
> >>
> >>   repos/base-hw/src/core/include/spec/imx53/trustzone/csu.h
> >>
> >> just reset mostly all devices except the UART to belong to the
> >> non-secure world, and set the DMA channel of the GPU (line 222) to be
> >> unsecure. Remove the relevant patches of the Linux guest OS from this
> >> branch (I think the last 4 commits):
> >>
> >>   https://github.com/skalk/linux/commits/imx53-tz
> >>
> >> and then re-build the Linux kernel and Genode scenario.
> >>
> >> Regards
> >> Stefan
> >>
> >>> Thanks!
> >>>
> >>>
> >>>
> >>>
> >>
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> >>
> >> --
> >> Stefan Kalkowski
> >> Genode Labs
> >>
> >> http://www.genode-labs.com/ · http://genode.org/
> >>
> >>
> >>
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> >
> >
> >
> >
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>
> --
> Stefan Kalkowski
> Genode Labs
>
> http://www.genode-labs.com/ · http://genode.org/
>
>
> ------------------------------------------------------------------------------
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