users August 2023

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9 participants
8 discussions

Virtualvox6 and two raw partitions
by Pirmin Duss 27 Sep '23

27 Sep '23

Hello Genodians I'm do want to sculptify my fleet of devices. For that reason I'm currently trying to run Virtualbox6 with two raw partitions. Because of the sizes of disks, the partitions are located on different disks. I'm using the vbox6-block package archive from alex-ab for my tests on sculpt 23.04. To simplify tinkering around and resetting the changes I created a local copy of the package archive. If I disable the second disk, I can run the virtual machine without problems. When I start the VM with the second disk enabled the following error is printed: [runtime -> work -> vbox] Warning: pthread_attr_setstacksize: requested stack size is 1048576 limiting to 1032192 [runtime -> work -> vbox] Warning: pthread_attr_setstacksize: requested stack size is 1048576 limiting to 1032192 [runtime -> work -> vbox] Error: ioctl operation=33 [runtime -> work -> vbox] Error: void ioctl(SUPCALLVMMR0&) called (/home/alex/genode/sculpt.t460p/depot/alex-ab/src/vbox6/2023-04-26/src/virtualbox6/sup.cc:668), not implemented, eip=0x1a74c77 I have connected the second Block session of the VM to a part_block for the second disk, which I start with the following launcher: <launcher pkg="trimpim/pkg/part_block/2023-04-25"> <config> <policy label="1" partition="1" writeable="yes"/> </config> <route> <service name="Block"> <parent label="ahci-2"/> </service> </route> </launcher> Does someone have an idea what I could change to prevent the error? Regards, Pirmin

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Announcement: Genode OS Framework version 23.08 released
by Norman Feske 24 Aug '23

24 Aug '23

I am happy to announce the release of Genode 23.08 today. https://genode.org/news/genode-os-framework-release-23.08 This version is primarily focused on two aspects of developer tooling. First, it introduces a new multi-component debug monitor that can be used as drop-in replacement for init to interact with the hosted components via the GDB protocol. We regard it as the gateway to smooth on-target debugging on Sculpt OS. Second, the Goa tool rapidly evolves into an all-encompassing alternative to Genode's traditional work flows for developing, porting, and publishing applications. The release introduces countless new productivity boosters, up to the ability to manage cross-dependencies between Goa projects. Besides these two prominent topics, we concentrated our efforts on code modernization, the retiring of legacies, and quality assurance. This involves the replacement of aged device drivers by completely new ones that leverage our modern DDE-Linux approach. E.g., there are new drivers for PC NICs as well as the USB host controllers of the Raspberry Pi and i.MX6. Summary of changes: - New multi-component debug monitor - Goa tool support for working with multiple projects - New NIC server for raw uplink connectivity - New PC network driver based on DDE-Linux - New USB host drivers for i.MX6 and Raspberry Pi - New PinePhone support for buttons and screensaver - New depot-remove component - Improved drivers for Intel GPU, Intel display, Wifi, and audio - Internal core and base-framework modernization The official release documentation covers all the details: https://genode.org/documentation/release-notes/23.08 Hoping you'll enjoy the new version, Norman -- Dr.-Ing. Norman Feske Genode Labs https://www.genode-labs.com · https://genode.org Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth

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Announcement: Genode OS Framework version 23.05 released
by Christian Helmuth 22 Aug '23

22 Aug '23

Today we released Genode 23.05 as a colorful bouquet of new features, improvements, and fixes. The most prominent change for developers is the update of our tool chain to GCC 12, binutils 2.40, and GDB 13.1. The new GCC version gave us the opportunity to switch from C++17 to C++20 as default setting and benefit from modern C++ language features. Another noteworthy addition falling into the same category is the release of the evolving Goa tool for Sculpt 23.04, which now enables the use of existing SDKs like Lomiri or Rust's cargo for Genode. Our Linux device-driver environment (DDE), which enables the use of Linux drivers as Genode components was upgraded to Linux 6.1.20. For example, the DDE now powers our cross-platform Wifi stack that works for the PC and ARM platforms as the PinePhone alike. Further, we integrated the initial use of our custom base-hw microkernel as x86 hypervisor, a profoundly reworked block-encryption stack, and updates of supported third-party software like the seL4 kernel and VirtualBox. Last but not least, we published our annual documentation update in form of "Genode Foundations" and "Genode Platforms" books. The current release contains the following changes and new features: - Goa tool updated to Sculpt OS 23.04 - Ubuntu-Touch-UI toolkit - Initial support for Rust cargo - New tool chain based on GCC 12.3 - C++20 enabled by default - Annual documentation update - Uniform Wifi stack across PC and ARM platforms - Revision of Genode's custom block-encryption infrastructure - Linux device-driver environment updated to Linux 6.1.20 - Improved USB, Intel display, and NVMe drivers - VirtualBox 6.1.44 - Initial x86 virtualization via the base-hw microkernel - Updated seL4 microkernel to version 12.1 - NetBSD rump kernel on RISC-V Read the complete release documentation for the version 23.05 here https://genode.org/documentation/release-notes/23.05 Best regards -- Christian Helmuth Genode Labs https://www.genode-labs.com/ · https://genode.org/ https://twitter.com/GenodeLabs · https://genodians.org/ Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth

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Trying to understand how capabilities are implemented
by Martin Stein 21 Aug '23

21 Aug '23

Hi Albin! On 19.08.23 03:35, Albin Otterhäll wrote: > 1. The RPC object A is created inside the protection domain 1, which result in the object identity A being created by the kernel. > > 2. A has a name, which is a natural number. > Q1: Is the RPC object's name the value of a class variable of type int? In short: Yes, you can consider it a simple integer that is known to both the kernel and the affected user-land program. The name references this object only within this one program (respectively protection domain). Just in case you're interested in some code background: In header [1] you can find the classes Rpc_object and Rpc_entrypoint - a thread that is used for handling RPCs on RPC objects. An RPC object initially comes without a capability (the objects name), but a capability is created and returned when linking the object via Rpc_entrypoint::manage to an entrypoint. At this point the object becomes ready to be called from outside the program. As you can see in header [2], Capability has no members but inherits from Untyped_capability, AKA Native_capability, which contains a pointer _data. Now, this is where it becomes platform-specific. However, a very simple case is the "base-hw" kernel. There, the _data pointer itself (as long value) is used as local name of the object [4]. This long value is the name that is registered in the domain's cap space inside the kernel for that particular RPC object. > 3. Protection domain 1 has a capability space insied the kernel. > Q2: Is the protection domain seperate from the capability space in the kernel, and they're "connected" with some map somewhere? In general, this is very kernel-specific. However, I know the internals only for the "base-hw" kernel. In this kernel, the cap space is not separate from its protection domain. Each domain object [5] contains a tree _cap_tree of all RPC object names known to this domain (see [6] for more details). > Q3: Is the capability space a map between natural numbers and some form of address to the object identity? I.e. the map work similar to a set of OO references, there the keys are variable names; and the values are the memory addresses of object identities. Again very kernel-specific and, again, my knowledge about "base-hw": In this kernel your depiction is very accurate. Each RPC object name is an Object_identity_reference in the kernel and contains a pointer Object_identity *_identity. > Q4: If the answer to Q3 is yes, does that mean that delegagion is some form of mechanism to share the adress of the object identity with other protection domains? If I understand you correctly, yes and no. To the user it looks like sharing an address in OO but you might better think of it as sharing the _ability_ to access the object. In contrast to address sharing, delegation creates a new local name/reference for the object identity in the target domain/cap space. In my domain the object might be referenced by the name "3" while in a domain I have delegated to, the object might be referenced by the name "987". However, even if delegation would result in the same name "3", the link between this name and the object is unique to the target domain as is that between my "3" and the object. This is well illustrated by § 3.1 Figure 3 in the book. I hope that was helpful!? [1] base/include/base/rpc_server.h [2] base/include/base/capability.h [3] base/include/base/native_capability.h [4] base-hw/src/lib/base/capability.cc:59 [5] base-hw/src/core/kernel/pd.h [6] base-hw/src/core/kernel/object.h

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Trying to understand how capabilities are implemented
by Albin Otterhäll 19 Aug '23

19 Aug '23

Hi! I'm currently reading through Genode: Foundations, and I've some questions regarding the implementation that came up while reading section 3.1. Can you please confirm, or correct me if I've misunderstood something? It will help me understanding the content of the subsequent chapters 1. The RPC object A is created inside the protection domain 1, which result in the object identity A being created by the kernel. 2. A has a name, which is a natural number. Q1: Is the RPC object's name the value of a class variable of type int? 3. Protection domain 1 has a capability space insied the kernel. Q2: Is the protection domain seperate from the capability space in the kernel, and they're "connected" with some map somewhere? Q3: Is the capability space a map between natural numbers and some form of address to the object identity? I.e. the map work similar to a set of OO references, there the keys are variable names; and the values are the memory addresses of object identities. Q4: If the answer to Q3 is yes, does that mean that delegagion is some form of mechanism to share the adress of the object identity with other protection domains? Thanks for the help! -- Albin Otterhäll

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CCC Camp 2023
by Stefan Kalkowski 14 Aug '23

14 Aug '23

Hello genodians, tomorrow the CCC Camp 2023 starts officially at Ziegeleipark Mildenberg [1]. If you attend the camp and if you are interested in a chat about Genode topics, or like to have a look at Sculpt OS running on top of PC, MNT Reform2, or Pinephone, please give me a sign. I'll be there from Tuesday afternoon to Saturday evening. Looking forward to see some of you there! Best regards Stefan [1] https://events.ccc.de/category/camp-2023/ -- Stefan Kalkowski Genode labs https://github.com/skalk | https://genode.org

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23.05 image is good, still need help
by Johnny Nunez 11 Aug '23

11 Aug '23

Hi Genodians, I was running the latest image 23.05 but i can't seem to install anything? I get a lot of Error: HTTP response code said error (code=404), fail.... the only Depot that seem to work was ssumpf , and this one has Vbox , all I need, but then Vbox calls for other packages too that genodelabs and cnuke are not able to connect to. I guess i will keep trying.

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Screensaver for the PinePhone
by Norman Feske 02 Aug '23

02 Aug '23

To all Sculpt-OS-on-the-PinePhone testers, I have just published a new Sculpt OS image for the PinePhone that includes a screensaver mode to increase battery time. You can download the image with version 2023-06-30 at [1], or use Sculpt's built-in system update feature, selecting me (nfeske) as image provider, and download and install the latest entry of my index. [1] https://depot.genode.org/nfeske/image/ The screensaver kicks in after ten seconds of user inactivity in the administrative user interface. It also can be manually activated by pressing the power button. While the screen is blanked, a press of the power button enables the display again. Under the hood, Sculpt completely removes the drivers for the display and the touchscreen while the screen is blanked, which considerably reduces the power draw. The system also switches the CPU to economic mode while the screen is blanked. Here are some illustrative data points: Max brightness in performance mode: 2.8 W Max brightness in economic mode: 2.6 W Low brightness in economic mode: 1.7 W Screensaver: 1.0 W As a caveat, I noticed that the screen-flickering issue, we sporadically observed in the past, occurs quite often when returning from the screensaver (aka after restarting the drivers). The flickering disappears after a while. However, maybe this way of reproducing the issue gives us the chance to eventually solve it. Have fun with trying out the new image! Norman -- Dr.-Ing. Norman Feske Genode Labs https://www.genode-labs.com · https://genode.org Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth

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