users April 2015

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31 participants
38 discussions

netperf
by Анна Будкина 07 Jun '16

07 Jun '16

Hello! I'm running netperf TCP_STREAM and TCP_MAERTS tests for lxip stack and i obtained extremely low result - 5x10^6 bits/s while the maximum throughput is 1000 mbit/s . I wonder what could be the reason for that. Anna

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i.mx53qsb and ARM Trustzone Techology
by Joseph Lee 10 Dec '15

10 Dec '15

Hi >From the article in this link http://genode.org/documentation/articles/trustzone , I understood that the DDR RAM in i.mx53 QSB is partitioned off between normal world and secure world. I just want to read a file in the normal world from application running in the secure side. Is there any possibility to get access to any file in normal world from the secure world? thanks for your help in advance. Regards, Joseph

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synchronization between normal and secure world
by Stefan Brenner 14 May '15

14 May '15

Hi, just a short question, I am using the TZ VMM example on i.MX53. How can I syncronize accesses to a shared memory range between secure world and normal world? I would be interested in a mutex that can be acquired both from Genode in secure world, as well as from Linux in normal world. Ciao

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Re: Help with RaspberryPI USB on Fiasco.OC+Genode
by Reinier Millo Sánchez 07 May '15

07 May '15

Hi Norman I've been testing the USB driver in the RaspberryPI assigning priorities to each processes, but continue losing events. I have also tried changing the top value of cnt, but still the same result. I will continue doing some independent tests of the driver, mouse, keyboard and network independently. If you have any other suggestions? Best regards > Hi Reinier, > >> I have checked the kernel warning about USB's irq, using base_hw and >> base_foc, and have noted (per 8000 need_trigger_sof calls): >> (base_hw) - kicked 5, filtered aproximatelly 7600 and triggered >> aproximatelly 250 IRQs >> (base_foc) - kicked 3, filtered aproximatelly 7700 and triggered >> aproximatelly 140 IRQs >> There is a big difference in the triggered and filtered irqs. Any idea >> or suggestion?? > SOF interrupts are filtered unless the USB driver explicitly calls > 'schedule_sof_interrupt' and thereby propagates the next > frame-to-deliver via the GUID scratch register to the kernel. If, for > some reason, the USB driver is not scheduled timely enough, it might > miss the scheduling of a frame. This can happen if the USB driver runs > concurrently with another program that consumes a lot of CPU time. In > such a scenario, the scheduling of the USB driver depends on the > scheduler of the kernel. Since Fiasco.OC has a different scheduler than > base-hw, the effect ultimately depends on the kernel. One way to work > around it is to run the USB driver at a high priority. I.e., by > assigning a priority of "-1" to all components except for the USB and > timer drivers. For an example of how to use priorities in Genode, please > have a look at the gems/run/wm.run script. Look out for the > 'prio_levels' and 'priority' attributes. > > Note that this is just a guess. If the effect also occurs when not > running a CPU hungry program besides the USB driver, the guess is most > likely wrong. > >> I don't understand the use of cnt variable (need_trigger_sof). Why use >> 160 as counter top?? > This mechanism ensures that an interrupt is delivered every now and then > - even if the USB driver has not scheduled a frame. There are 8000 IRQs > coming in per second. With the value of 160, an interrupt is forwarded > to the USB driver every 20 milliseconds, which appeared to me as a > low-enough rate to have a negligible effect on the system's performance. > >> I'm waiting fix this problem to upload the patch to GitHub. >> I have tested the USB driver using two versions of Fiasco.OC, the >> default Fiasco.OC version (https://github.com/ssumpf/foc.git) and a more >> recently version (https://github.com/skalk/foc.git), but have the same >> problem. >> >> Furthermore I have tested succesfully the support of Genode with >> Fiasco.OC as microkernel for RaspberryPI using the autopilot tests: >> (util_mmio,ldso,timer,lwip,rm_fault,rom_blk,tar_rom,noux,libc_ffat,libc_vfs,timed_semaphore,signal,sub_rm,python,thread_join,failsafe,noux_tool_chain_auto, >> seoul-auto,resource_request,xml_generator,blk_cache,rump_ext2,thread,pthread, >> netperf_lwip, netperf_lwip_usb30, netperf_lwip_bridge, netperf_lxip, >> netperf_lxip_usb30, netperf_lxip_bridge) >> Now I'm trying to test l4linux and other more complex examples. > -- Lic. Reinier Millo SÃ¡nchez Centro de Estudios de InformÃ¡tica Universidad Central "Marta Abreu" de Las Villas Carretera a CamajuanÃ Km 5 1/2 Santa Clara, Villa Clara, Cuba CP 54830 "antes de discutir ... respira; antes de hablar ... escucha; antes de escribir ... piensa; antes de herir ... siente; antes de rendirte ... intenta; antes de morir ... vive"

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ARM TrustZone Demo in i.MX53 SABRE Tablet
by JaeminPark 06 May '15

06 May '15

Today, I got Freescale i.MX53 SABRE Tablet and I’d like to make demo as described “Shortcut” in README (https://github.com/skalk/genode/blob/i.MX53_tablet_demo/os/src/server/vmm/i… <https://github.com/skalk/genode/blob/i.MX53_tablet_demo/os/src/server/vmm/i…>). After boot-up the tablet, I failed to load image.bin into the device. It could be a ridiculous question, but please tell me which point I did wrong. My procedure was as follows : 1) Download image.bin from URL in https://github.com/skalk/genode/blob/i.MX53_tablet_demo/os/src/server/vmm/i… <https://github.com/skalk/genode/blob/i.MX53_tablet_demo/os/src/server/vmm/i…> 2) Setup sdcard as follows : (sdcard is mounted in /dev/sdb) sudo parted /dev/sdb --script mklabel msdos sudo parted /dev/sdb --script mkpart primary ext4 5M 100% sudo dd if=$(U-BOOT-DIR)/u-boot.imx of=/dev/sdb seek=2 bs=512 conv=fsync sudo fdisk -l /dev/sdb sudo mkfs.ext4 /dev/sdb1 sudo udisks --mount /dev/sdb1 sudo cp image.bin /media/371a8dd7-58c1-4beb-aed3-cb18fb40f7eb/ sudo udisks –-unmount /dev/sdb1 3) insert sdcard into MMC adapter, and then insert MMC (sdcard) into the tablet 4) After power up the tablet, U-BOOT prompt (u-boot from MMC is not used), I did as follows : MX53-SMD U-Boot > ext2load mmc 0:1 0x70800000 image.bin (hang forever) So, I couldn’t load image.bin into the tablet, thus I couldn’t boot demo image in the tablet. If possible, (for the beginner in this field) please let me know full procedures to set up the MMC (sdcard) for this demo.

2 2

Porting GNU libraries
by Aditya Kousik 05 May '15

05 May '15

Hello I'm trying to port libsqlite which is a dependency for another application (which I'm also trying to port). The build of this library is a one line compilation. But it requires a -ldl flag for dynamically loaded libraries (it uses dlopen() and dlfcn.h). I've tried getting the source for this, to no avail so far. Is there a way to link libraries directly from the linux host. Intuitively, that doesn't seem to work. Thoughts on how to move forward? Thanks and regards, Aditya

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Non-standard display resolution support
by Nobody III 30 Apr '15

30 Apr '15

I would like Genode to support my monitor's native resolution, 1920x1080, which my BIOS doesn't support. I have a Radeon HD 5450 video card. What is the easiest way to support the resolution? Do I need a Radeon HD-specific driver, or can I add additional display modes through another means?

1 0

Re: Develop TrustZone for iMX6
by bharath 30 Apr '15

30 Apr '15

> Hello bharath, > On April 29, 2015 6:55:01 AM CEST, bharath <bharathkr.bojja@...52...> wrote: >> please, follow Martin's advice and do not use the outdated RUN_OPT >> setting when using u-boot. If you replace it like this: > >> RUN_OPT += --include image/uboot > >> You will even find a uImage in your 'var/run/tz_vmm_mx6' folder. >Sorry I >> was not recognizing that you were using the old, invalid setting for >> RUN_OPT when writing my last mail. > Please follow Stefan's advice and extend RUN_OPT as described above. > Greets > -- > Christian Helmuth > Genode Labs Hello Helmuth, Yes I have extend RUN_OPT += --include image/uboot before giving make run/tz_vmm_mx6. Still uImage is not found in var/run/tz_vmm_mx6/ folder. Only image.elf and boot_modules.s were found in the folder. Please suggest. Thanks, Bharath

3 2

AHCI not working on real hardware
by Nobody III 30 Apr '15

30 Apr '15

Months ago, I had issues with the AHCI driver not working with part_blk. I tested a simple scenario with AHCI and a non-writing version of test-blk-cli. It didn't work (test-blk-cli-nowrite didn't give any output), but the AHCI driver gave its normal output. I tested a slightly modified config using rom_blk instead of ahci, and it worked just fine. Any ideas about what might be wrong?

2 3

Re: Develop TrustZone for iMX6
by bharath 30 Apr '15

30 Apr '15

> Am I right if I assume you fixed this issue as you ask about a > U-Boot-related problem in another thread? Hi Helmuth, No that issue is still there. Actually I have built the uImage for another source code. That uImage is giving u-boot related problems. Parallelly I am working on both. Kindly suggest the solution. Thanks, Bharath

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users April 2015