Date and Time: 15:00 GMT Meeting and connection details Join Zoom Meeting https://linaro-org.zoom.us/j/99184594168?pwd=eklPZlBmUDB3VEd6VngxOWpMTXdvZz09 Meeting ID: 991 8459 4168 Passcode: 13371337 Find your local number: https://linaro-org.zoom.us/u/acGNPcsIS9 |
Recording: We’ll record the meeting, if you object, please let us now. Link and password will be added to this page (see sections further down).
Goal with today’s meeting: Better understand the gaps in developing for Arm using Rust and whether Linaro, its members and community can and should invest in this.
The kernel makes use of and depends on unstable features. Do we know what those features are? Can we name something?
https://rust-for-linux.com/unstable-features - Miguel Ojeda, will share his view.
The PR for tracking unstable features.
Also, creating connections for certain subsystems like clk, regulator, pinmux, gpio, etc., which are important for supporting System-on-Chip (SoC) devices. This might be more important in the future.
Perhaps that partly would address the ONCD report?
https://www.whitehouse.gov/oncd/briefing-room/2024/02/26/press-release-technical-report/
Tier support is generally pretty good, but it wouldn't hurt to review and also to see whether potential Arm Tier-3 should be moved up to Tier-2. Any direct suggestions on what to propose? The matrices shown here https://rust-lang.github.io/rustup-components-history seems to be helpful, but Tier-3 is mostly lacking information.
https://rust-lang.github.io/rustup-components-history/
It's difficult to re-use drivers written for bare-metal systems and adding support for HAL interfaces is going too slow (SoC vendors typically not involved).
Recording
In general, please see recording.
We were running out of time to discuss the Tier support and the bare-metal drivers/HAL etc. Will need to follow up.
Summary from Rust-for-Linux / Miguel:
Rust toolchain people need to know about specific compiler flag that we use and need.
There is a bit of a gap of Arm presence when it comes to the toolchain side of Rust.
Rust-for-Linux people, within limits and availability offers support to help Linux kernel maintainer interested in rewriting their subsystems using Rust.
We need justifications and users to be able to justify rewriting some parts.
CI is important for the Rust support, currently there are testing done via TuxSuite (Linaro) and KernelCI.
Please see recording.