Hi,
I was wondering if someone could point me at documentation, or describe in a reply, how L4 Fiasco + L4Re makes use of the ARM TrustZone hardware? I see that support for TrustZone is listed listed as one of the features of Fiasco, but haven't been able to figure out exactly what that means.
If built for an ARM chip with TrustZone support, does L4 automatically set up a TrustZone execution environment for each L4 server? Or do I need to tell it somewhere to put each server into its own environment? Are the hardware calls automatically made when switching between servers? How does use of TrustZone influence message passing between servers?
I'm afraid all I've found in the source appears to be some code in the hardware porting layer that is a relative mystery to me.
Thanks,