Hi Ofer, On 05/05/2015 11:06 AM, Ofer Hasson wrote: > Hey, > > I'm using Freescale i,MX53 QSB. > I'm trying to transfer data between the secure world and the normal > world, at the moment, I manage to transfer data using the CPU registers > (using Linux kernel module I wrote), and I manage to receive them on the > hypervisor. > I would like to transfer larger structure, for example a memory buffer, > I'm allocating in the normal world kernel a buffer, I send the physical > address (using __pa) to the secure world. > > My question is, how in the Genode hypervisor I can access this memory > address ? > Any idea will be helpful
just as a side-note: we distinguish between hypervisor and virtual-machine monitor. Our hypervisor/kernel does not do anything meaningful with the "normal world", it just reflects exceptions (e.g. secure-monitor-calls) of the "normal world" to the dedicated VMM. The VMM - a simple userland component - should do the actual work. In our small example, which I assume you were using as starting point, the VMM already has all the physical memory of the "normal world" guest OS already attached (in a way that it does not end up in the cache) to its virtual address space. The abstraction to lookup the virtual address of the VMM with respect to a given physical address of the guest memory is the "Ram" class (repos/src/server/tz_vmm/include/ram.h). Be careful when using a memory buffer in Linux to propagate content to the "secure world". That memory has to be mapped within the Linux kernel to _not_ end up within the cache too. Otherwise you will get an incoherent view to the memory between both worlds. Regards Stefan > > Thanks > Ofer > > > ------------------------------------------------------------------------------ > One dashboard for servers and applications across Physical-Virtual-Cloud > Widest out-of-the-box monitoring support with 50+ applications > Performance metrics, stats and reports that give you Actionable Insights > Deep dive visibility with transaction tracing using APM Insight. > http://ad.doubleclick.net/ddm/clk/290420510;117567292;y > > > > _______________________________________________ > genode-main mailing list > genode-main@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/genode-main > -- Stefan Kalkowski Genode Labs http://www.genode-labs.com/ ยท http://genode.org/ ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ genode-main mailing list genode-main@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/genode-main
