June 2016 - Devel - lists.sel4.systems

Beaglebone black/CAmkES issue
by Julien Delange 15 Jun '16

15 Jun '16

I am using the second serial interface of the beaglebone black. According to the source code (in libsel4platsupport/plat_include/am335x/sel4platsupport/plat/hw/soc_AM335x.h), the address is 0x48022000). The following line is found in the source #define SOC_UART_1_REGS (0x48022000) So, in CAmkES, I configure the hardware component that represents the serial hardware component with the following attributes: drv.mem_attributes = "0x48022000:0x1000"; The application compiles fine. However, when launching the image on the target, I have the following issue. Any idea about how to solve this? Does anybody successfully used UART1 on the beaglebone black? Or have any idea/suggestion to investigate? Thanks. Julien. Creating object conn1_frame__timer_0 in slot 728, from untyped 29b... device frame, paddr = 0x48040000, size = 12 bits Creating object conn2_frame__Cons_PingMe_0 in slot 729, from untyped 29b... device frame, paddr = 0x48022000, size = 12 bits capDL-loader :: << Error: Failed to find device frame at paddr = 0x48022000 >> Ignoring call to sys_rt_sigprocmask Ignoring call to sys_gettid sys_tkill assuming self kill

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Tidying and real-time
by Jeff Waugh 15 Jun '16

15 Jun '16

This commit… https://github.com/seL4/seL4/commit/c5b6a6a58aae75129cdf5a83f861bdacddbf51d6 … is pleasing. As is the RT API. Passive servers! A seemingly viable and sensible approach to user-space scheduling! Just a quick thumbs up for recent progress. :-)

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CAmkES parsing issue
by Julien Delange 10 Jun '16

10 Jun '16

Hi, I am trying to build a camked application with a UART driver. When trying to build the application, I got the following error: While rendering uart_mem.from.source: 'drv' However, the component is well define. How can I try to get more information/debug of the camkes assembly and find out what is wrong? Thanks! Note: the project can be found there: https://drive.google.com/file/d/0Bxl72qH3r6BjRGxYSXd2LUllcDQ/view?usp=shari…

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camkes arm vm I/0 devices
by Josh Tuttle 08 Jun '16

08 Jun '16

Hey, We have been playing around with the busybox for tk1 that was included in the build. While trying to verify all the I/0 devices, we noticed that the Ethernet device would not come up. Looking though dmesg, it seems to load a driver but never initializes a device. Ifconfig just errors when trying to bring up eth0. Has anyone verified the I/0 devices on tk1 using this build? Not being familiar with busybox, can we follow this: http://elinux.org/Jetson/Busybox_RootFS guide to building a busybox image to include all appropriate drivers? Thanks, Josh

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seL4 benchmarks available
by Anna Lyons 07 Jun '16

07 Jun '16

Hi all, I've just finished pushing the seL4 benchmarking suite out to github. Get it: * manifest: https://github.com/seL4/sel4bench-manifest * explore the applications: https://github.com/seL4/sel4bench. Cheers, -- Anna Lyons Kernel engineer / PhD Student DATA61 | CSIRO E anna.lyons(a)nicta.com.au<mailto:anna.lyons@nicta.com.au> www.data61.csiro.au<http://www.data61.csiro.au> CSIRO's Digital Productivity business unit and NICTA have joined forces to create digital powerhouse Data61 ________________________________ The information in this e-mail may be confidential and subject to legal professional privilege and/or copyright. National ICT Australia Limited accepts no liability for any damage caused by this email or its attachments.

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Unable to build camkes-vm
by Samuel Weiser 07 Jun '16

07 Jun '16

Hello, didn't manage to build camkes-vm. Is there any working setup available or did I make something wrong? 1.) I tried to build c162_twovm_defconfig with the "default.xml" manifest 1a.) I get compile errors regarding some definitions of seL4_X86.... It seems that seL4_libs (March 2016) are inconsistent with the kernel version (Dec 2015). Updating to a newer kernel, i.e. 3.1.0 solves this issue but creates new ones: 1b.) The bootinfo struct is too big to fit one page. I get the error: compile_assert(bi_size, sizeof(seL4_BootInfo) <= BIT(BI_FRAME_SIZE_BITS)) So I reduced the max. no of bootinfo untyped caps from 800 to 167 1c.) Error: No rule to make target 'libsel4simple-default', needed by 'libsel4platsupport-y' Since the kernel is not stable, it falls back to default but does not manage to correctly reference the default lib. First, I added the missing symlink in libs. Then, I added the default lib to the main Kconfig and the apps/c162_twovm/Kbuild. 1d.) The next error is: x86/pc99/include/vmm/guest_state.h:60:44: error: unknown type name ‘seL4_VCPUContext’ ... 2.) I also tried building with the "working.xml" manifest, which already failed to fetch the correct revisions 2a.) In the working.xml, I fixed the seL4_libs upstream to 'master' Also, the kernel revision is broken, seL4.git points to an experimental commit, which couldn't be fetched. I changed it to kernel 3.1.0. 2b.) The same error as in 1d) appears. This is where I gave up. Any hints? Thanks in advance, Sammey

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VM on SeL4 for TK1
by Joshua Tuttle 06 Jun '16

06 Jun '16

Hi, I am working with Peng Xie to run the vm for tk1 code that Adrian gave out a couple of days ago, located at https://github.com/seL4proj/camkes-arm-vm-manifest. We have successfully been able to build and run on our tk1 board, but are met with a buildroot login prompt. What is the username and password, we should be using? Also, is this a para-virtualized or fully-virtualized environment? Thanks, Josh Tuttle Research Engineer Intelligent Automation, Inc. 15400 Calhoun Dr., Suite 109 Rockville, MD 20855 Ph: (301) 795-2706 jtuttle(a)i-a-i.com<mailto:jtuttle@i-a-i.com> ________________________________ This message and all attachments are PRIVATE, and contain information that is PROPRIETARY to Intelligent Automation, Inc. You are not authorized to transmit or otherwise disclose this message or any attachments to any third party whatsoever without the express written consent of Intelligent Automation, Inc. If you received this message in error or you are not willing to view this message or any attachments on a confidential basis, please immediately delete this email and any attachments and notify Intelligent Automation, Inc.

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Latest experimental RT kernel released
by Anna Lyons 03 Jun '16

03 Jun '16

= Latest experimental RT kernel released = The RT kernel provides + periodic scheduling, + temporal isolation, + support for criticality and criticality mode changes, + temporal exceptions, .. and more. == Caveats == The RT kernel does not compile or run on all platforms, we currently support: + x86: ia32 platforms with TSC_DEADLINE mode + ARM: Sabre lite, Beagle board, and Odroid-xu (all armv7-a). The RT kernel is not verified, and as such we provide no guarantees, and there's likely still some bugs hiding in there. The other platforms require driver work at user level and in the kernel. If you are keen to get a certain platform working, contributions are welcome! == Available == + *Kernel branch* on github: https://github.com/seL4/seL4/tree/rt + *Release notes* (detailed API changes from current seL4 latest release): https://wiki.sel4.systems/seL4%201.0.0-rt-dev + *RT kernel manual* http://sel4.systems/Info/Docs/seL4-manual-1.0.0-rt-dev.pdf + *whitepaper* http://arxiv.org/abs/1606.00111 == Try it == Check out the rt branch of sel4test-manifest with repo: $ repo init -u https://github.com/seL4/sel4test-manifest.git -b rt Feedback on the API would be *extremely* valued. Enjoy! -- Anna Lyons Kernel engineer / PhD Student DATA61 | CSIRO E anna.lyons(a)nicta.com.au<mailto:anna.lyons@nicta.com.au> www.data61.csiro.au<http://www.data61.csiro.au> CSIRO's Digital Productivity business unit and NICTA have joined forces to create digital powerhouse Data61 ________________________________ The information in this e-mail may be confidential and subject to legal professional privilege and/or copyright. National ICT Australia Limited accepts no liability for any damage caused by this email or its attachments.

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Memory allocation & threads
by Доброхотов Ринат 03 Jun '16

03 Jun '16

Hello, I don't understand how static and virtual pool's size related to thread's available working space. I got the example app from the sel4-tutorials project with process creation (app-4). A static pool and a virtual pool are created in this app. I have done experiments with size of this pools and size of arrays in the second thread. For example I set size of virtual pool to zero, as I understand this pool need to create kernel objects. Also I define the test array size of (1 << 23)~8,3Mb. If test array is static, static pool size must be equal to ((1 << seL4_PageBits) * 100) ~0,4Mb. If test array is no static, static pool size not limited. Why is it so? -- Best Regards, Rinat Dobrokhotov

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Will the codes in branch rt be merged into master
by XilongPei 01 Jun '16

01 Jun '16

Hi, I got information from https://wiki.sel4.systems/seL4%201.0.0-rt-dev , the development branch for the seL4 realtime extensions. My question is that will the codes in branch rt be merged into master, and add some build option. If a working tree always not in the master branch, it will be very difficult to be managed. Xilong Pei Tongji University 2016/6/1

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