SMC in tz_vmm

chirag garg chiragdthinker at ...9...
Fri Jan 23 14:44:10 CET 2015


Hello Stefan,

Thanks a lot to remind me about this section. I really missed it. It helps
me a lot.

Regards,
Chirag Garg
IIT Madras

On Fri, Jan 23, 2015 at 2:17 PM, Stefan Brenner <brenner at ...290...>
wrote:

> Hi,
>
> Have a look at section "World switch between non-secure world and secure
> world" in http://genode.org/documentation/articles/trustzone. There it
> says "Given this approach, the software stack running in the secure
> world must not execute the smc instruction. This drastically simplifies
> the assembler world-switch routine."
>
> Best.
>
> Am 23.01.15 um 06:11 schrieb chirag garg:
> > Hi all,
> >
> > I have some doubts in Genode Flow, ARM provides the smc instruction to
> > enter in the monitor-mode which performs the world switch between normal
> > world and secure world.
> >
> > As tz_vmm script is also successfully achieving the above objective of
> > world switch from the secure world to the normal world. But i am not
> > able to figure out flow which will which execute a call of smc
> > instruction in the run of tz_vmm script.
> >
> > Can anyone explain me the flow ?
> >
> > Thanks in advance.
> >
> > Regards
> > Chirag Garg
> > IIT Madras , Rise Lab
> >
> >
> >
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> Choose from 2 high performing configs, both with 100TB of bandwidth.
> Higher redundancy.Lower latency.Increased capacity.Completely compliant.
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