Welcome to Mathieu Dubois-Briand

Mathieu Dubois-BriandWe’re happy to announce that Mathieu Dubois-Briand has just joined the Bootlin engineering team!

Mathieu graduated from the UTBM, Mathieu spend 12 years at Witekio, where he worked first on Android AOSP, and then on many Linux-based Board Support Package, based on Yocto or Buildroot, for various ARM and ARM64 platforms such as the NXP i.MX and TI OMAP families. During this process, he wrote Device Trees and developed Linux kernel drivers for common devices, such as touchscreen controllers, 3-axis accelerometers, and network PHYs.

In addition to development, Mathieu has managed the maintenance of several projects, including CVE analysis and updating software components throughout the product lifecycle. His work has also involved security-related topics, including secure boot, Trusted Execution Environment, and Trusted Applications using OP-TEE, as well as secure communication between devices, primarily employing TLS and DTLS protocols.

Furthermore, Mathieu has some experience with microcontroller development, using real-time operating systems like FreeRTOS and Zephyr on MCUs from the i.MXRT, ESP32, and STM32 families.

Mathieu has joined our engineering team based in Lyon, and will help us offer more embedded Linux expertise to our customers, including some additional expertise on BSP development, maintenance, CVE analysis, and security. As a Bootlin engineer, Mathieu already participated to the Open Source Summit Europe in Vienna, and is directly contributing to the build engineering effort of the upstream Yocto Project.

Please see Mathieu’s Bootlin page and LinkedIn profile.

Bootlin contributions to Linux Plumbers conference: slides and videos

Luca Ceresoli and Hervé Codina speaking at Linux Plumbers conference 2024After the participation of 13 Bootlin engineers to Open Source Summit 2024, no less then 8 Bootlin engineers attended the Linux Plumbers Conference that took place right after Open Source Summit Europe in Vienna.

In addition to participating, we contributed 3 talks/discussions (Linux Plumbers is primarily designed to host discussions, not pure talks): Representing the front-facing ports of Ethernet interfaces, Hotplug DRM pipeline components on non-discoverable video busses and Runtime hotplug on non-discoverable busses with device tree overlays.

In this blog post, we’re happy to share the slides and videos of those talks.

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Bootlin talks at Open Source Summit Europe 2024: slides and videos

João Marcos Costa giving his talk at Open Source Summit Europe 2024No less than 13 Bootlin engineers attended the Open Source Summit Europe 2024 in Vienna earlier this month, and two Bootlin engineers gave talks at this conference, keeping with Bootlin’s long standing tradition of sharing knowledge with our peers of the broader embedded Linux community.

In this blog post, we’re happy to share the slides and videos of the two talks we have during this event: Linux Power Management Features, Their Relationships and Interactions and Inspecting and Optimizing Memory Usage in Linux

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Linux 6.11 released, Bootlin contributions inside

Linux 6.11 has been released a week ago, the day before Open Source Summit Europe started, but as a large part of the Bootlin team was attending this conference and the immediately following Linux Plumbers conference, we are only posting now our usual blog post about our Linux 6.11 contributions.

As usual, we warmly recommend our readers to look at the articles from LWN.net covering the 6.11 merge window (part 1, part 2) to get a good high-level overview of the major new features and hardware support added in 6.11. CNX-Software also has a useful article on the 6.11 features relevant for embedded platforms.

From a Bootlin perspective, we contributed a total of 120 commits in this release, making us the 19th contributing company by number of commits, worldwide, according to the statistics. In addition to those 120 commits authored by Bootlin engineers, we reviewed and merged 76 patches from other contributors, as part of the Linux kernel maintainer role of several Bootlin engineers (Alexandre Belloni as the RTC and I3C maintainers, Miquèl Raynal as the MTD co-maintainer, and Grégory Clement as the Marvell platform maintainer).

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Bootlin at Kernel Recipes 2024

Kernel Recipes 2024Just after the busy week of Open Source Summit Europe and Linux Plumbers in Vienna, the Kernel Recipes conference is starting in Paris, as it takes place on Sep 23-25.

With its single-track format, high-profile speakers, small audience and friendly atmosphere, Kernel Recipes is quite unique in the landscape of open-source conferences, and has therefore become very popular over the past 10 years.

This year again, Bootlin engineers are attending this event, with this year 5 of our engineers participating: Jérémie Dautheribes, Alexis Lothoré, Romain Gantois, Louis Chauvet and Bastien Curutchet.

Bootlin engineers at Kernel Recipes

Do not hesitate to get in touch with the Bootlin engineers at the event to discuss Linux kernel and/or embedded Linux topics!

Bootlin Live #0, live video podcast on embedded Linux

We’re happy to announce that we’re starting Bootlin Live, a (hopefully) regular live video podcast that will cover embedded Linux topics in the broadest sense, as we aim at also covering open-source RTOS, hardware, and other related topics relevant to embedded open-source developers. Save the date of Sep 30 at 6 PM UTC+2 for the first episode and read on for more details on this new initiative.

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Bootlin topics at Linux Plumbers conference in Vienna, Sep 18-20

Linux Plumbers conference 2024Next week is going to be a busy week in Vienna, with the Open Source Summit Europe followed by the Linux Plumbers conference. As we had already published in a previous blog post, Bootlin will have a very strong presence at those events: 13 Bootlin engineers will participate to the Open Source Summit and 2 will give talks, and 8 Bootlin engineers will participate to Linux Plumbers.

Regarding Linux Plumbers, we also proposed 3 discussion topics that got accepted:

  • Representing the front-facing ports of Ethernet interfaces, a discussion proposed by Bootlin engineer Maxime Chevallier. This is a topic that Maxime has been working on for quite some time, mainly as part of customer projects at Bootlin. The first step of this effort recently got merged in the Linux kernel, and the ethtool part is being reviewed, but what got merged is only the first step, and additional developments are needed and will be discussed at Plumbers.
  • Runtime hotplug on non-discoverable busses with device tree overlays, a discussion proposed by Bootlin engineers Luca Ceresoli and Hervé Codina. Both Luca and Hervé have been working over the past year or so on projects that involve using Device Tree overlays. Luca on a project where a part of the hardware, with non-discoverable busses (I2C, DSI, etc.) is connected/disconnected at runtime, and Hervé on a project where a PCI device is a full SoC with numerous peripherals that already have drivers in the kernel. Several patch series have been proposed on the mailing lists already, and we hope this discussion at Plumbers will help move the topic forward.
  • Hotplug DRM pipeline components on non-discoverable video busses, a discussion proposed by Bootlin engineer Luca Ceresoli is also related to the previous project, but this discussion focuses on the DRM aspect. Indeed, one of the non-discoverable bus that gets connected/disconnected in our use-case is DSI, so we need to make it hotpluggable, which isn’t supported by Linux currently. We made some proposals on the mailing lists on this topic, and discussion is on-going. We hope a face to face discussion at Plumbers can help moving this other topic forward.

Meet us next week in Vienna, either at the Open Source Summit and/or at Linux Plumbers!

Linux kernel driver and Yocto training courses now on BeaglePlay

BeaglePlayLast summer, we announced the availability of our Embedded Linux course on the BeaglePlay platform.

Today, we are happy to announce the publication of our Linux kernel driver development and Yocto Project/OpenEmbedded system development courses also ported on the BeaglePlay platform.

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Debugging, tracing and profiling training updated with new eBPF content

Back in January 2023, we announced the availability of a new Bootlin training course  “Linux debugging, profiling, tracing and performance analysis”, initially developed and taught by former Bootlin engineer Clement Léger. A year and a half later, the training course, now taught by Bootlin engineers Luca Ceresoli and Alexis Lothoré, is one of the most requested amongst Bootlin training courses.

Following the feedback received from many people who attended the course, we are happy to announce that a new version of the training is available and  now includes a whole new part about eBPF technology !

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Bootlin toolchains 2024.05 released

We just released version 2024.05 of the Bootlin toolchains, a set of 220 freely available pre-compiled cross-compilation toolchains, targeting a wide range of CPU architectures, with support for the 3 major C libraries used in the embedded Linux world: glibc, uClibc-ng and musl.

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