TZ support without NDA

[Madhu (Macaque Labs)]

On Sat, Feb 28, 2015 at 9:57 AM, Sebastian Sumpf <
Sebastian.Sumpf at ...1...> wrote:

> On 02/28/2015 02:38 AM, Madhu (Macaque Labs) wrote:
> > Who are the ARM cpu vendors who publish their trust zone support ?
>
> > I know Freescale does, know for a fact Qualcomm does not !
> > Mediatek ?
>
> Yes, Freescale does, that is why it is currently our ARM platform of
> choice .-) Also ARM does (Versatile Express), but that is just a proof
> of concept.
>
We are currently manufacturing an i.MX6 tablet for developers with taper
enabled.
We can get the OEM to sell that to other hackers but i.MX6 is not going to
cut it.

We tried working with Qualcomm but the NDA was too stringent.So we gave
that up.
 But a local
tablet vendor may launch a proprietary version based on Qualcomm parts.
We have an R&D relationship with Samsung, so have asked them, let us see
how that goes.



>
> > Trying to do a virtualized android tablet distribution. Can we have
> > a genode sub project on this. I am sure, others would be interested.
>
> Sure, but that heavily depends on resources available at our side. If
> you can start or even do it, I think most of the eight people here will
> be glad to help you.
>
I keep getting 100s of internship applications every year, so manpower is
not the
problem. Problem is that most interns are simply not cut out for kernel
hacking.
Hopefully I can get a small team selected soon. But the bigger problem is
my bandwidth. If we can decide on the approach in this forum and work out a
concrete roadmap,
I will try to arrange for the resources. Currently I have 2-3 Master's
projects on Genode
every year.



>
> > Also attempting a port of bionic on genode. First hack is done,
> > doing so excited testing. If this works, then genode on genode
> > virtualization might suffice.
>
> Ok, if you need help, just ask here.
>
The question here is that is it worthwhile virtualizing Linux or just
provide bionic on Genode running on Genode.



> > Using
> > Freescale currently but it is A9, so has no VT support and
> > power usage is on the higher side.
>
> We have some power management on A15, not for A9 though.
>
> > I see a couple of Samsung exynos boards on  the support list,
> > I think both are a15 based cores. So does that mean we can hack
> > a galazy tab or a high end galaxy s phone  to run genode ? Has to be the
> > wifi
> > or the Asian version.
>
> Maybe, we do have a pretty good documentation on Exynos 5250, but
> everything above is problematic or ends up in looking at some Linux
> source code.
>
Maybe then we should standardize on Samsung and focus our efforts on that.




>
> > Both run Exynos. US 3g/lte variants typically run snapdragon though
> > I believe that is changing with the new s6.
> > would be nice to have a cortex a 53/57 device though.
>
> Yes, it would be. No hardware at our side.
>
> > I have also asked AMD for details on their new Carrizo processor.
> > this is a multi core x86 with a cortex ax supposedly running trustzone.
> > Wanr to try a virtualize Ubuntu on this with security modules secured
> > through tz.
>
> Let us know how this turns out!
>

Will know by this week, talking to the product manager. Helps that we have
our students
in large volumes in every semiconductor company on the planet !


> > Our own open source Shakti processor based on RiscV is getting its  TZ
> > support
> > but it will be at least end of the year before we can release it on
> > fpga. Student code
> > takes to ensure to clean up ! Also riscv mmu slecture is not available
> yet.
> > The UCB rocket processor is ready but some one has to hack TZ into it.
>
> RiscV is since FOSDEM my self-declared hobby project. No progress so far
> though, but if you guys actually build an ASIC that would be awesome.
> Maybe I should start with that soon :-)
>

We will be releasing basic SoCs by June, maybe earlier. I have a TZ
controller
getting reading but it is very buggy and I need a couple of months of code
review
before I can release it.  But I would rather focus on our tagged ISA scheme
which will
provide HW level capability.



>
> Cheers,
>
> Sebastian
>
> >
> >
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-- 
Regards,
Madhu
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