Hi David, Yes, you're right. I had the same problem when I received my first IRQ. This is what Linux commit [1] is for. It calls tzic_end_sw_irq at the end of event_interrupt in file [2]. Note that you have to call it with the physical IRQ number (in my case defined through the Genode config and read via SMC genode_block_irq) and not the virtual IRQ number, which is normally used in Linux (e.g. on request_irq).
[1] 0fa1c63 .handle multiple replies and end interrupt [2] <LINUX>/drivers/block/genode_block.c On 28.07.2015 15:03, David Goltzsche wrote: > Hi Martin, > > based on the commits you mentioned, I implemented a minimal kernel > module, which should receive the interrupts injected by genode. > > Overall it works: My Handler gets called when I trigger a software > interrupt in genode. > > However, the handler is called endlessly for a single interrupt. I > assume, i have to clear the interrupt somehow. I called > tzic_end_sw_irq(..) before returning from the handler. > > Here is my code: http://pastebin.com/NDBV6qYf > > Any Hints? > > David > > On 06/29/2015 12:05 PM, Martin Stein wrote: >> Hi David, >> >> On 29.06.2015 09:20, Stefan Kalkowski wrote: >>>> 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. >>> >>> Indeed, this seems to be the most promising approach triggering a >>> software interrupt on the secure side, and handle it in the normal >>> world. Everything that needs to be done is marking a designated SPI (ARM >>> terminology for software-triggered IRQ) as a non-secure interrupt, and >>> delegate that interrupt to your kernel module within the guest OS. >>> Moreover, you will need to extend the VM session interface with the >>> ability to trigger that designated "TrustZone interrupt", as the >>> user-level VMM is not able to access the interrupt controller directly, >>> which has to be done by the kernel itself. >> >> On my working branches [1] I've implemented IRQ injection to provide a >> pseudo block device in a non-secure linux guest. Maybe this code gives >> you some good hints. Especially the linux commits [2] and the Genode >> commits [3] should be interesting. Please be aware that this code is >> still in progress and should not be considered as final solution. >> >> Don't hesitate to ask if you have further questions ;) >> >> Cheers, >> Martin >> >> [1] >> https://github.com/m-stein/genode/tree/1497_usb_armory_demo >> https://github.com/m-stein/linux/tree/1497_usb_armory_demo >> >> [2] >> 0fa1c63 .handle multiple replies and end interrupt >> 9ca75d0 .injected IRQ reaches the stub-block handler in linux >> >> [3] >> 08a3b09 .prototype of inject_vm_irq kernel call >> 2927f04 .Vm_session::inject_irq(unsigned irq) >> 42865c4 .injected IRQ reaches the stub-block handler in linux >> >> ------------------------------------------------------------------------------ >> 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 >> > ------------------------------------------------------------------------------ _______________________________________________ genode-main mailing list genode-main@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/genode-main
