Hi Genode team & list, in my master's thesis I built a framework, which enables cross-world-communication between the normal and secure world. This was based on your tz_vmm demo. If this sounds familiar: I already posted a few questions on this list related to my thesis ;)
My framework relied on periodic world switches triggered by Genode's scheduler (The normal world is running within a Genode thread, so the scheduler prevents both worlds from starving). Of course, simply waiting for world switches leads to high latencies and a low throughput. To speed things up, we already improved the communication from normal to secure world: The normal world instantly hands over control to the secure world utilizing the smc instruction, when a message is available. We extended the hypercall handler in the Vmm class to notify the receiver via a semaphore. Unfortunately, forcing a world switch from secure to normal world does not seem to be that easy: Genode's monitor mode implementation cannot handle entries from the secure world. Hence, usage of the smc instruction is not possible. So, my approach would be using software interrupts which sould be routed to the normal world. I played around with the svc (supervisor call) instruction, but I don't know how to route this to the secure world. Any hints? Thanks in advance David -- M.Sc. David Goltzsche Institute of Operating Systems and Computer Networks Distributed Systems Group TU Braunschweig www: https://www.ibr.cs.tu-bs.de/users/goltzsch mail: goltzs...@ibr.cs.tu-bs.de ------------------------------------------------------------------------------ Monitor 25 network devices or servers for free with OpManager! OpManager is web-based network management software that monitors network devices and physical & virtual servers, alerts via email & sms for fault. Monitor 25 devices for free with no restriction. Download now http://ad.doubleclick.net/ddm/clk/292181274;119417398;o _______________________________________________ genode-main mailing list genode-main@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/genode-main
