Hi David, On 06.11.2015 15:39, David Goltzsche wrote: > The basic mechanism works fine, but we need to transfer some meta > information with the interrupt to the normal world. > > One possible approach would be to write something to a certain location > in the non-secure memory before triggering the interrupt and reading > that location from Linux. Of course, a cross-world synchronization > mechanism is required here to maintain the consistency of the reserved > memory range. > > Another approach could use Linux's shared interrupts: Additional > information can be transferred via the dev_id pointer passed to an > interrupt handler. > > Are both approaches possible in general, which one would you recommend?
I am not knowledgeable with the second approach. But passing additional information along with the interrupt delivery sounds not natural to me. The natural and time-tested approach would be to pass the information in a (virtual) device register, like a real device would do it. This is essentially your first approach. Cheers Norman -- Dr.-Ing. Norman Feske Genode Labs http://www.genode-labs.com · http://genode.org Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth ------------------------------------------------------------------------------ Presto, an open source distributed SQL query engine for big data, initially developed by Facebook, enables you to easily query your data on Hadoop in a more interactive manner. Teradata is also now providing full enterprise support for Presto. Download a free open source copy now. http://pubads.g.doubleclick.net/gampad/clk?id=250295911&iu=/4140 _______________________________________________ genode-main mailing list genode-main@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/genode-main
