Linux/PROCESSOR-SDK-AM335X: Adding SGX on base arago file system.

Hi Pavel,

Thanks for your response. Trying to use the Building the SDK steps it looks like the base SDK if I were to take it without modifications has everything included.

And then using DISTRO_FEATURES_remove I can remove features from it before fetching.

Is there a list of removes that would give me a bare base, and I can choose which removes to not use to keep required features?

Or is there an option that would make it into a bare base version, and I could use commands to add features?

The example has:

DISTRO_FEATURES_remove = "wayland"

"wayland" looks like a keyword that removes this module from SDK.

Is there documentation describing all the possible options?

Kind regards,

Ugnius

Ugnius,

I can find only two more wikis related to filesystem customization:

processors.wiki.ti.com/.../Customization
processors.wiki.ti.com/.../Sitara_Linux_Training:_Getting_Started_with_Openembedded

For more info you should check Yocto documentation.

There is also option to add graphics in bare metal filesystem, instead of removing unused features from full filesystem:

e2e.ti.com/.../594535

Regards,
Pavel

Thanks Pavel,

Yes, ideally I would like to add 3D support to bare system.
I will check the resources you provided.

Kind regards,
Ugnius

It looks like sgx driver is available from sdk/board-support/extra-drivers/

I can build it from the root of SDK with make ti-sgx-ddk-km

When I try to install it to the file system however, it complains about uncnown symbols:

INSTALL /home/tisdk_3304/board-support/extra-drivers/ti-sgx-ddk-km-1.14.3699939/eurasia_km/eurasiacon/binary2_omap_linux_release/target/kbuild/bc_example.ko
INSTALL /home/tisdk_3304/board-support/extra-drivers/ti-sgx-ddk-km-1.14.3699939/eurasia_km/eurasiacon/binary2_omap_linux_release/target/kbuild/pvrsrvkm.ko
DEPMOD 4.4.41-g968d071ce9
depmod: WARNING: /home/tisdk_3304/targetNFS/lib/modules/4.4.41-g968d071ce9/kernel/fs/configfs/configfs.ko needs unknown symbol rt_down_read
depmod: WARNING: /home/tisdk_3304/targetNFS/lib/modules/4.4.41-g968d071ce9/kernel/fs/configfs/configfs.ko needs unknown symbol _mutex_lock
depmod: WARNING: /home/tisdk_3304/targetNFS/lib/modules/4.4.41-g968d071ce9/kernel/fs/configfs/configfs.ko needs unknown symbol rt_spin_unlock
depmod: WARNING: /home/tisdk_3304/targetNFS/lib/modules/4.4.41-g968d071ce9/kernel/fs/configfs/configfs.ko needs unknown symbol rt_spin_lock

it has a lot of these warnings.
Does this mean it actually fails writing?

The sdk I am using is RT version.
Thus my kernel version is 4.4.41-rt50-g968d071ce9
I had to remove rt50 name bit from the file system for it to access the correct location.
Are these warnings caused by the fact that I am using RT linux version?

Hi,

I built it on one machine and then moved it to another one using my own git repo.
It looks like my first machine had normal version installed, and the second one had RT version installed.
Basically I checked out normal SDK linux files onto RT version SDK. Thats why installing SGX triggered version mismatch errors.

Using RT SDK alone I managed to build and install modules into my file system.

Is installing module automatically sets up the driver or do I have to do anything on the target side before I can use the driver?

The application I am trying to run cannot find libEGL.so.
Is it part of the SGX driver?

The error is: Error: libEGL.so: cannot open shared object file: No such file or directory.

Kind regards,
Ugnius

Ugnius,

Ugnius Subacius said:

Is installing module automatically sets up the driver or do I have to do anything on the target side before I can use the driver?

Once successfully installed, ti-sgx-ddk-km (pvrsrvkm.ko) driver should be ready for use. See below wiki page for details:

Ugnius Subacius said:

The application I am trying to run cannot find libEGL.so.
Is it part of the SGX driver?

I can find such file in PSDK linux-devkit

{PSDK}/linux-devkit/sysroots/armv7ahf-neon-linux-gnueabi/usr/lib

Hi Pavel,

I tried copying the library files that my application require from {PSDK}/linux-devkit/sysroots/armv7ahf-neon-linux-gnueabi/usr/lib to my target /usr/lib/ folder.

However in the end it still fails to load them properly:


INFO [0.398]:Initia[ 157.407413] PVR_K:(Error): BridgedDispatchKM: Driver initialisation not completed yet.
lize plugin: [greio (4.2.1.21580)] []

PVR:(Error): Couldn't load WS module libpvrws_WAYLAND.so [0, ]
PVR:(Error): PVRSRVBridgeCall: Failed to access device. Function ID:3223086849 (strerror returns no value.). [0, ]
PVR:(Error): PVRSRVEnumerateDevices: BridgeCall failed [0, ]
PVR:(Error): PVRSRVConnect: Unable to enumerate devices. [0, ]
PVR:(Error): Couldn't connect to services [0, ]
WARN [0.418]:eglInitialize: failed. eglGetError returned 3003

I will try to use bitbake to compile missing packages and then install them

I did it for ti-sgx-ddk-um.
But it still needs:
wayland, libdrm-omap1 and libgbm2

Will try to get them from bitbake.