tz_vmm demo on imx53qsb

[Stefan Kalkowski]

Hi Joseph,

On 01/05/2016 01:49 AM, Joseph Lee wrote:
> Hello everyone,
> 
> I have built and run the current Genode version(15.11) with trustzone for
> hw_imx53_qsb_tz platform but i used the initramfs (initrd.gz) for Android
> image that are used in the demo for Sabre tablet (
> https://github.com/skalk/genode/blob/i.MX53_tablet_demo/os/src/server/vmm/imx53/README).

That is right, one has to distinguish between Sabre Tablet and
Quickstart Board on different levels including the Android images. There
might be more surprises when porting the existent demo to the Quickstart
board.

> After some trials and errors, I have managed to get the following outputs
> (see attached) on the serial console and it got stuck. is this the right
> approach to run Android in the normal world of i.mx53 QSB?  What is missing
> ? lvds display is connected to the board but nothing is displayed.

When looking at the attached output I cannot see any initialization of
drivers (e.g.: the framebuffer driver). It looks to me as if you are
using the current 'tz_vmm' run-script that is used for automated testing
only without any graphical setup. Is that right?
As an alternative, you might use the run script from the tablet demo as
a starting point:


https://raw.githubusercontent.com/skalk/genode/i.MX53_tablet_demo/os/run/vmm.run

But again, you must brace yourself for surprises, because the run-script
is pretty much outdated and was created for a very specific setup on top
of the SABRE tablet.

Apart from that, the output really looks good, but in the end your
Android VM faults when trying to access the GPU (data-abort at physical
address 0x30001740). That is because the GPU is set as secure within the
kernel device initialization (more precisely the Central Security Unit
initialization) in file:
repos/base-hw/src/core/include/spec/imx53/trustzone/csu.h

The GPU is set as secure like the "Image Processing Unit" (framebuffer
device), because we enabled the DMA channel of the framebuffer driver to
access secure memory, as it is driven by Genode's framebuffer driver
that runs within the secure world. Sadly the GPU device uses the same
DMA channel ID, and thereby the GPU is allowed to access secure memory
via DMA too. Therefore, we set the GPU to be used by the secure world only.

If you want to use the GPU within the normal world (Android) for
demonstration purposes only, and do not matter about DMA device attacks,
you can also re-set the GPU to be unsecure (search for GPU 2D and 3D in
the csu.h file).

Regards
Stefan

> 
> Thanks,
> 
> On Mon, Dec 28, 2015 at 4:48 AM, Joseph Lee <leejose911 at ...9...> wrote:
> 
>> Hi everyone,
>>
>> i am currently trying to run trustzone demo on imx53 Quick Start Board
>> (qsb). In which i want to run Android OS in the normal world. i followed
>> the instruction in this link (
>> https://github.com/skalk/genode/blob/i.MX53_tablet_demo/os/src/server/vmm/imx53/README)
>> and built the uImage successfully. I put the uImage on the SD card
>> partition (/dev/mmcblk0p1). However, when try to boot the uImage, it gets
>> stuck after displaying the following outputs. I have attached the whole log
>> messages. FYI, the SD card has two partitions(/dev/mmcblk0p1 and
>> /dev/mmcblk0p2) with ext4 format.
>>
>> mmc0: new high speed SDHC card at address 0007
>> mmcblk0: mmc0:0007 SD32G 28.9 GiB
>>  mmcblk0: p1 p2
>> init: cannot open '/initlogo.rle'
>> EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts:
>> (null)
>> EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
>> init: Unable to open persistent property directory /data/property errno: 2
>> init: cannot find '/system/bin/sh', disabling 'console'
>> init: cannot find '/system/bin/servicemanager', disabling 'servicemanager'
>> init: cannot find '/system/bin/vold', disabling 'vold'
>> init: cannot find '/system/bin/netd', disabling 'netd'
>> init: cannot find '/system/bin/dispd', disabling 'dispd'
>> init: cannot find '/system/bin/debuggerd', disabling 'debuggerd'
>> init: cannot find '/system/bin/app_process', disabling 'zygote'
>> init: cannot find '/system/bin/mediaserver', disabling 'media'
>> init: cannot find '/system/bin/dbus-daemon', disabling 'dbus'
>> init: cannot find '/system/bin/installd', disabling 'installd'
>> init: cannot find '/system/etc/install-recovery.sh', disabling
>> 'flash_recovery'
>> init: cannot find '/system/bin/keystore', disabling 'keystore'
>> init: cannot find '/system/bin/rild', disabling 'ril-daemon'
>> init: cannot find '/system/bin/magd', disabling 'magd'
>> init: cannot find '/system/bin/wlan_tool', disabling 'wlan_tool'
>>
>> could you please let me know what is missing?
>>
>> thank you!
>>
> 
> 
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-- 
Stefan Kalkowski
Genode Labs

http://www.genode-labs.com/ · http://genode.org/