Tesla may have hired some great software people and tech people, but they still rely on companies like Nvidia, MobileEye, Velodyne LiDAR. Tesla no more makes all the autonomous components much like Apple doesn't make all the hardware in an iPhone.
The standards are all the same ISO-26262 and ASIL A-D.
How you get there may be varied and different but NXP, Nvidia, Velodyne along with other companies are going to supply most of the the hardware and Tesla along with the others will put a software layer on top.
Nvidia makes the processor core that Tesla is using. ->
http://www.nvidia.com/object/tesla-and-nvidia.html
I have worked on processor elements for ASIL-D and previously fault tolerant computers.
BTW - I would love to have a Plug-In X1 Hybrid.