- Rust-vmm - lists.opendev.org

interest in other Unixes?
by Allison Randal 26 Jun '25

26 Jun '25

Hi all, How interested would you be in patches for Unix family operating systems other than Linux? I'm working on a prototype lightweight VMM on the Illumos Kernel and Bhyve ioctl interface, and I'm planning to reuse rust-vmm libraries where I can. I prefer to work upstream on shared libraries, but I totally understand if the focus here is Linux, and patches for other Unix family operating systems are undesirable. As a concrete example of how non-disruptive this can be, the patch I'm debating whether to submit is a 4 line substitution in vmm-sys-util, which changes [#cfg(unix)] to [#cfg(linux)]. Right now, those lines are checking for target_family = "unix", but the code in question is actually unique to Linux, and fails to compile on other Unix family operating systems (mostly due to type errors, and using features that only exist on Linux), so it really should be checking target_os = "linux" instead. The specific changes are lines 8, 17, and 19, in src/lib.rs, which determine whether to use the code in the architecture-specific 'unix' directory, and whether to use the bitflags library (which is only used by the 'unix' directory). And, line 183 in src/errno.rs testing a very specific string message as the text for libc::EBADF, which has slightly different wording on other Unix family operating systems. That simple substitution makes it possible to use both vmm-sys-util and vm-memory on Illumos (since vm-memory was only using architecture-independent parts of vmm-sys-util for temp files in tests, and nothing in the 'unix' directory). I haven't started systematically testing other rust-vmm libraries for non-Linux compatibility yet, but I expect I'll find similar patterns. (Full disclosure: I personally prefer Linux Kernel and KVM, but this is paid work, and sparks enough intellectual curiosity for me to be willing to do it.) Thanks for any thoughts, Allison

4 6

Central repo for VirtIO conformance tests?
by Alex Bennée 31 Mar '25

31 Mar '25

Hi, We've been working with Panasonic to expand the testing of VirtIO across a range of hypervisors and VMMs. We've tackled this with two approaches: - simple unikernel to verify features and basic functions common - rootfs images to exercise the whole device The unikernel utilizes rcore-os's no_std VirtIO drivers to discover and initialize a range of VirtIO devices. The tests mostly focus on checking no unknown feature bits are advertised as well as ensuring features dependencies are properly realizable. This is useful for those interested in moving workloads between hypervisors to ensure you don't end up relying on a proprietary feature that aren't available elsewhere. The virgl test also does some very basic blob mapping to check the underlying mechanics are working. The unikernel outputs a TAP stream to make integrating into a test harness easier. You can find the current state here: https://git.codelinaro.org/manos.pitsidianakis/virtio-tests While we only build an aarch64 unikernel the upstream drivers have examples for riscv and x86_64 as well. As more complex VirtIO devices like GPUs tend to have a significant user-space component, we have also started building Linux rootfs images to exercise those. The images themselves are built against a baseline architecture so they can be used on as wide a range of hardware as possible. They have been built with buildroot to make them lightweight and as close to the upstream projects as possible without relying on particular distro support. You may have seen the recent aarch64 GPU image being added to QEMU's functional tests recently: https://gitlab.com/qemu-project/qemu/-/blob/master/tests/functional/test_aa… I'm currently working on a similar image utilizing a subset of the blktests project to exercise the VirtIO block devices. The various recipes can be found here: https://gitlab.com/stsquad/buildroot/-/tree/adding-blktests?ref_type=heads although the intention is for all the recipes and basic QEMU based tests to be up-streamed into buildroot in due course. While I will no doubt expand the functional tests in QEMU over time to utilize these images, there is a wider question of where would be a good place to host a more comprehensive VirtIO test suite? While useful for validating proprietary hypervisors there are also a bunch of other VMMs and VirtIO backends other than QEMU: - rust-vmm's vhost-device collection of vhost-user backends - CrosVM - Cloud Hypervisor - libkrun As well as using VirtIO backends with other hypervisors such as Xen, Gunyah and WHPX. So this brings me to the question posed in the subject. Where would a good place be to host these conformance tests? My initial thought was to see if this is something OASIS could host as part of the specification however I'm not sure OASIS is set up for such a thing. We could host it as part of the QEMU project as a service to the wider community. While it should be pretty easy to expand QEMU's own tests to work with multiple hypervisors, its test machinery isn't really setup for non-QEMU VMMs. Ideally we would want the core repository to be able to run on multiple hypervisors and use different VMMs and backends depending on where they are being run. The other option I considered was hosting with the rust-vmm project - although maybe that just makes sense for the unikernel tests as they are rust based. We certainly need more automated testing of the vhost-device repository which can serve as a backend to multiple VMMs and hypervisors. So what do people think? Where would be a good place for common test repository to live? -- Alex Bennée Virtualisation Tech Lead @ Linaro

4 5

Canceled: rust-vmm sync meeting
by Florescu, Andreea 06 Mar '25

06 Mar '25

New invite sent for earlier in the day.

1 0

Canceled: rust-vmm sync meeting
by Florescu, Andreea 06 Mar '25

06 Mar '25

New invite sent for earlier in the day.

1 0

QEMU is participating in Google Summer of Code 2025
by Stefan Hajnoczi 05 Mar '25

05 Mar '25

Dear QEMU, KVM, and rust-vmm communities, QEMU has been accepted into the Google Summer of Code 2025 open source internship program! GSoC is a paid, remote work, summer internship where first-time contributors work with mentors to begin their open source involvement. It's a great way to dive into becoming an open source developer! Applicants can now check out the project ideas list and get in touch with mentors to discuss the idea: https://wiki.qemu.org/Google_Summer_of_Code_2025 This year we have QEMU and rust-vmm project ideas in C, Python, and Rust. If you are interested in participating in GSoC 2025, please see the GSoC website for details about eligibility and how the internship program works: https://summerofcode.withgoogle.com/ Stefan

1 0

Call for Participation
by 何若轻 03 Mar '25

03 Mar '25

Dear Rust-VMM community, This is an invitation to Open Source Promotion Plan (OSPP) held by ISCAS (Institute of Software, Chinese Academy of Sciences). About Open Source Promotion Plan -------------------------------- The Open Source Promotion Plan is a summer program organized by the Open Source Software Supply Chain Promotion Plan of the Institute of Software Chinese Academy of Sciences from 2020. It aims to encourage university students to actively participate in the development and maintenance of open source software, cultivate and discover more outstanding developers, promote the vigorous development of excellent open source software communities, and assist in the construction of open source software supply chains. The program collaborates with various open source communities, providing project development tasks for the development and maintenance of important open source software, and is open for registration to university students worldwide. Students can independently choose projects they are interested in, apply, and after selection, carry out development under the guidance of project developers (community mentors). Based on the project's difficulty and completion, participants (*mentors and mentees*) will receive a bonus, and a completion certificate for mentees. Who can Mentor ---------------------- Regular contributors, maintainers and gatekeepers of Rust-VMM can participate as mentors. Mentorship involves about 5 hours of time commitment per week to communicate with the intern, review their patches, etc. Time is also required during the intern selection phase to communicate with applicants. Being a mentor is an opportunity to help someone get started in open source development, will give you experience with managing a project in a low-stakes environment, and a chance to explore interesting technical ideas that you may not have time to develop yourself. Please read mentor guide: https://summer-ospp.ac.cn/help/en/mentor/ How to Participate ---------------------- As an organization, RustVMM need a `community contact` who is responsible for registering RustVMM org in OSPP, and submit passed proposals to OSPP. As a mentor, you should submit (raise a PR) a project proposal in: https://github.com/rust-vmm/community, if your PR gets merged, then your proposal is considered as accepted. Proposals will be reviewed and selected by RustVMM community. More information ---------------------- You can find out about the process we follow here: Official website: https://summer-ospp.ac.cn/ Timeline: https://blog-en.summer-ospp.ac.cn/archives/timeline FAQ: https://blog-en.summer-ospp.ac.cn/archives/FAQ

1 0

rust-vmm sync meeting - new schedule: Monday @ 14:00 UTC every 2 weeks
by Stefano Garzarella 28 Feb '25

28 Feb '25

Hi all, after the poll [1] we did this week, it looks like the new preferred time for the bi-weekly rust-vmm meeting is: Monday @ 14:00 UTC every 2 weeks We will try this new schedule starting from the next meeting, which is next Monday (March 3rd). I'm attaching an updated ICS file (hope it works). Thanks, Stefano

1 0

Changing rust-vmm sync meeting time
by Stefano Garzarella 25 Feb '25

25 Feb '25

Hi all, during the last community call, we discussed anticipating the meeting time. Since we don't have any US people joining, and most of us are based in UE or China, should be better to find another time, especially for people joining from China. We found 4 potential 30 minutes slots (11-12 UTC, 14-15 UTC) every 2 Mondays as usual (next one: March 3rd). I just create a doodle to choose the best option: https://doodle.com/group-poll/participate/bkBmDA6a Please vote, so we can choose a new time for the meeting. Thanks, Stefano

1 0

Fwd: [Data Migration] Migration has been scheduled for rust-vmm
by Patrick Roy 14 Feb '25

14 Feb '25

Hey all, An update from buildkite on the database migration that we got a heads up about last year. 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Re: Call for GSoC internship project ideas
by Stefano Garzarella 10 Feb '25

10 Feb '25

+Cc rust-vmm ML, since in past years we have used QEMU as an umbrella project for rust-vmm ideas for GSoC. Thanks, Stefano On Tue, 28 Jan 2025 at 17:17, Stefan Hajnoczi <stefanha(a)gmail.com> wrote: > > Dear QEMU and KVM communities, > QEMU will apply for the Google Summer of Code internship > program again this year. Regular contributors can submit project > ideas that they'd like to mentor by replying to this email by > February 7th. > > About Google Summer of Code > ----------------------------------------- > GSoC (https://summerofcode.withgoogle.com/) offers paid open > source remote work internships to eligible people wishing to participate > in open source development. QEMU has been doing internship for > many years. Our mentors have enjoyed helping talented interns make > their first open source contributions and some former interns continue > to participate today. > > Who can mentor > ---------------------- > Regular contributors to QEMU and KVM can participate as mentors. > Mentorship involves about 5 hours of time commitment per week to > communicate with the intern, review their patches, etc. Time is also > required during the intern selection phase to communicate with > applicants. Being a mentor is an opportunity to help someone get > started in open source development, will give you experience with > managing a project in a low-stakes environment, and a chance to > explore interesting technical ideas that you may not have time to > develop yourself. > > How to propose your idea > ------------------------------ > Reply to this email with the following project idea template filled in: > > === TITLE === > > '''Summary:''' Short description of the project > > Detailed description of the project that explains the general idea, > including a list of high-level tasks that will be completed by the > project, and provides enough background for someone unfamiliar with > the code base to research the idea. Typically 2 or 3 paragraphs. > > '''Links:''' > * Links to mailing lists threads, git repos, or web sites > > '''Details:''' > * Skill level: beginner or intermediate or advanced > * Language: C/Python/Rust/etc > > More information > ---------------------- > You can find out about the process we follow here: > Video: https://www.youtube.com/watch?v=xNVCX7YMUL8 > Slides (PDF): https://vmsplice.net/~stefan/stefanha-kvm-forum-2016.pdf > > The QEMU wiki page for GSoC 2024 is now available: > https://wiki.qemu.org/Google_Summer_of_Code_2025 > > What about Outreachy? > ------------------------------- > We have struggled to find sponsors for the Outreachy internship > program (https://www.outreachy.org/) in recent years. If you or your > organization would like to sponsor an Outreachy internship, please get > in touch. > > Thanks, > Stefan >

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