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2310 discussions

memcpy_cpu on 64bit arm
by Michael Grunditz 24 Jan '23

24 Jan '23

Hello, Is there any particular reason why it is empty? My rect copy to fb in riscos uses neon. It is a speed gain of about 40% compared to word/long word copy from c. But I don't know how much it affects Genode. It seems like it ends up in /* eight bytes chunks */ but isn't that a byte copy? I have the feeling that in my case, with blit,mem copy without crop is faster than doing it with crop every time. Ram, accesses are proved to be very fast on this hardware. The extra cycles for cropping might be a bottleneck. Combined with a neon run through , testing and copying without leaving routine could probably make a big performance gain. But. I am happy, as always, to be proved wrong! Michael

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Re: revisit past discussions
by Johnny Nunez 23 Jan '23

23 Jan '23

Hi Martin, Maybe this is the link you mention: users (mail-archive.com)<https://www.mail-archive.com/users@lists.genode.org/>

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Re: scroll down the screen
by Johnny Nunez 22 Jan '23

22 Jan '23

Hi Colin, I think I found what my problem was, I was not using the right hardware. Now that I am booting from an old 4th generation Intel laptop , the display shows all the settings I need to set up the VM, which interesting enough was shown on > files > config > managed > deploy , where I would of made the same changes , I think

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Re: scroll down the screen
by Johnny Nunez 22 Jan '23

22 Jan '23

Hi Norman, Your comment “ editing the deploy config by hand “ sounds interesting , were would I even start ?

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Re: scroll down the screen
by Johnny Nunez 21 Jan '23

21 Jan '23

Hi Colin, I am getting confuse here, I am not staring Sculpt from qemu or anyother VM, I am starting Sculpt With the already made pre-compile version from genode web site with real hardware. I have try to compile a Sculpt version to see if this will work and I noticed that this way did not try to open a qemu window, after it finish compiling, it only gave me an .img file that I still can’t boot up in my real hardware. But this is another problem, I just want to be able to set up genode WM with the pre-compile image that is running now. I can’t finish setting all the options for the genode’s VM , maybe I will try to do this set up manually and not thru a gui?

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Re: scroll down the screen
by Johnny Nunez 21 Jan '23

21 Jan '23

Hi Colin, I am still struggling with the gui here , I can’t see what you reply back, can you please try again , thank you

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video and usb driver (rk3588)
by Michael Grunditz 20 Jan '23

20 Jan '23

Hello! I have USB working: [init -> drivers -> usb_hid_drv] dev_info: input: USB HID v1.00 Mouse [HID 04b4:0060] on usb-usbbus-/input0 [init -> drivers -> usb_hid_drv] dev_info: input: USB HID v1.00 Device [HID 04b4:0060] on usb-usbbus-/input1 Kernel: MMU-fault not handled ESR=0x92000061 Kernel: init -> drivers -> gui_fb -> ep raised unhandled MMU fault ip=0x1009bb4 fault-addr=0x113d76ac type=unknown But as you can see , if I move the mouse pointer I get that ESR after the pointer moves a small amount of pixels. and graphics stops. I have no idea why. The framebuffer, which is defined by u-boot, is above the specified RAM. I get the expected graphics , so it works that far. Two things can crash it. 1) The Mouse 2) Scout. I really want to add my own framebuffer using genode allocated ram.. it might help. But I don't know how. Please advise, Michael

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cpu id for big cpu 0x400
by Michael Grunditz 19 Jan '23

19 Jan '23

Hi I am testing starting from the big cpu on rk3588. The cpu id is 0x400. Starting is fine up to core entry. But there it stops. EL switching works. The question is , every other core is compared to NR_OF_CPUS, which is from 0 and up. What do I need to change? Michael ( will try now with core 1 , since obvisually core 0 isn't set up so that el switching works. I still thinks we should do core init so that we get a common state , regardless how u-boot leaves us. )

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Re: Roadmap 2023
by Alice 19 Jan '23

19 Jan '23

Dear Genodians, I start by mentioning that I am Jean-Adrien from Gapfruit. Sorry for the confusion I may create. I mailed you on my behalf today, with my private email address, to avoid interfering with any Gapfruit matter. I take your email, Norman, as an opportunity to share my enthusiasm about Genode. I may not have a significant contribution to make to the roadmap. But I would like to share some of my interests and motivation. This year I want to spend more time on contributions that can benefit the community. First, I will fix issues I have with my test machine to run Sculpt fully featured. Currently, networking via Wifi is not possible. Other difficulties may come after improving connectivity support. Next, I want to put effort into proposing 1) when I have finished with the 22.11 update integration and other work-related priorities. Then during my spare time, I would like to join efforts on support for Xen or Virt. Layer for Qube, adjusting myself to ongoing plans, if any exist? Following the "Roadmap 2023" discussion and after having a recent look at "Futur Challenges" [1] on the website, it is with lots of excitement that I found many subjects very close to my interests. Here are the topics: 1. Character device drivers as VFS plugins I proposed, some time ago [2], an SPI driver. The commits never made it to the staging branch because of the interfacing / "quality". Over time, at Gapfruit, we gained experience using the SPI bus, but only with TPMs. We recently refactored it into a VFS plugin for easier interfacing with libraries such as WolfTPM and TPM TSS. I believe BUS drivers such as I2C and SPI could be unified behind a standard "character device" VFS plugin interface. Can that benefit the community? I can put some effort into improving and contributing those commits. 2. Genode as virtualization layer for Qubes OS I am a daily user of Qube OS. Sculpt is an attractive alternative! Trying it out as a daily OS is part of my plans. I have little knowledge of the Qube OS internals, only that they use Xen as a hypervisor. I was surprised to find out about the hypervisor abstraction layer they created. It is a game changer for using Genode to build a virtualization layer. It brings so many questions to my mind. First, does full support for a hypervisor such as Xen need to find its way to Genode? Or is base-nova already a viable candidate? Are all necessary building blocks for AppVM message passing present within Genode? Which approach would you privilege first for investigation? If Xen, support for Genode in a Dom0 scenario first? Or, as an AppVM first, focussing on Qube RPC mechanism support? (I am aware of Xen DomU support, but I do not have all details in mind) Currently, those questions might be off-topic. Overall, it seems a significant challenge. 3. Xen as "Kernel" for Genode My ultimate goal here would be to have a pure minimal Genode-based OS in Dom0 for only managing guests' VM. Last summer, by curiosity related to 2), I started investigating necessary changes to the build system for building Xen as a port and generating a boot image using Xen with a Genode base-hw minimal scenario as Dom0. I was able to set up the port, successfully building Xen and booting it, but with a minimal Linux as Dom0 instead of a chosen Genode scenario "run/log," e.g. I still need to reach my goal. The real work only begins now. My primary technical motivation was working on low-level mechanisms to manage DomU(s) and enable RPC from one DomU to the other. I lost interest over time because I needed to be more confident in its relevance and missed lots of knowledge. At that time, I was unaware of the work of Julian Stecklina. I would be interested in looking into it! Is it publicly available? ----- Side note about the AMD Radeon drivers, my x86_64 test machine is an HP Elitebook 849 G2 equipped with an AMD Radeon R7 M260X. If some workforce is needed, I would also be happy to test and provide feedback! Another topic I was very interested in is initiatives like Spunky [3]. I am not making it a point as this is not to take as seriously as the others. With the gain of popularity from languages like, e.g. Rust. Is there any plan or similar initiative in that regard? I would be up to start one as a pet project. I am interested in trying this out with the Zig programming language [4]. My motivation for such a language comes from a Youtuber I appreciate [5]. He made an interesting video on memory safety within different languages [6]. I do not have any strong opinion on "C++ vs any other lang" topics. If you have other languages in mind, please let me know! Finally, thank you all for your supportive, kind and professional attitude! Since I started working with the Genode OS Framework, it has always been a pleasure to read from and interact with any of you. I am relatively junior to OS development. Thanks to my co-workers and following daily discussions on this mailing list, I learned a lot! [1] https://genode.org/about/challenges [2] https://github.com/genodelabs/genode/pull/4187 [3] https://genodians.org/m-stein/2019-05-09-spunky-1 [4] https://github.com/ziglang/zig [5] https://www.youtube.com/@contextfree [6] https://www.youtube.com/watch?v=qeiRGbYCD-0 Cheers, Jean-Adrien

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4K display
by Michael Grunditz 18 Jan '23

18 Jan '23

Hi! I am using u-boot to init graphics. U-boot uses edid, so I am reading the graphic chip to find out the screen mode. This works just fine in 1080p. But if I use my 4k monitor I get an unhandled exception. Is 4K a general problem? Michael

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