On 2/1/2026 1:21 PM, Mathieu Dubois-Briand via lists.openembedded.org wrote:
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On Fri Jan 30, 2026 at 2:41 PM CET, Hemanth.KumarMD via lists.openembedded.org
wrote:
From: Hemanth Kumar M D <[email protected]>
https://blog.rust-lang.org/2026/01/22/Rust-1.93.0/
Rust changes: https://github.com/rust-lang/rust/releases/tag/1.93.0
Cargo changes:
https://doc.rust-lang.org/nightly/cargo/CHANGELOG.html#cargo-193-2026-01-22
* rust-oe-selftest.patch updated for 1.93:
Renamed UI test directive from add-core-stubs to add-minicore as in
https://github.com/rust-lang/rust/commit/3796f7de57f5d4cf4325d1f13aeb07fdaa57983b
* OE-selftests:
- Exclude src/tools/remote-test-client from test suite.
This unit test modifies the TEST_DEVICE_ADDR environment variable,
which breaks the OE test harness that uses the same variable for
QEMU remote testing. Filed a bug with upstream:
https://github.com/rust-lang/rust/issues/151823
- Enable +v8a feature for cortexa57.
Rust 1.93.0 added a regression test (PR #149549) to verify that the
ARMv8-A system register ttbr0_el2 is recognized in inline assembly.
This addresses issue #97724 where LLVM wasn't recognizing ttbr0_el2
as a valid register. Upstream Rust enables +v8a by default for all
AArch64 targets (PR #105026), but Yocto's custom target specification
doesn't inherit this. Adding +v8a ensures LLVM recognizes ARMv8-A
system registers, fixing the test failure.
Related upstream links:
- PR #149549: https://github.com/rust-lang/rust/pull/149549
- Issue #97724: https://github.com/rust-lang/rust/issues/97724
- PR #105026: https://github.com/rust-lang/rust/pull/105026
Test results:
rust v1.93.0
+-------------+--------+---------+
| Machine | Passed | Skipped |
+-------------+--------+---------+
| qemux86-64 | 21,689 | 646 |
| qemux86 | 21,439 | 896 |
| qemuarm64 | 21,495 | 840 |
| qemuarm | 21,421 | 914 |
| qemuriscv64 | 21,466 | 869 |
+-------------+--------+---------+
Test results difference (1.93.0 - 1.92.0):
+-------------+--------+---------+
| Machine | Passed | Skipped |
+-------------+--------+---------+
| qemux86-64 | +205 | +33 |
| qemux86 | +205 | +33 |
| qemuarm64 | +206 | +32 |
| qemuarm | +205 | +33 |
| qemuriscv64 | +205 | +33 |
+-------------+--------+---------+
Signed-off-by: Hemanth Kumar M D <[email protected]>
---
Hi Hemanth,
Thanks for the upgrade.
I suspect this is responsible of the
runtime_test.RustKernel.test_kernel_rust_sample selftest failure:
2026-01-31 16:20:41,991 - oe-selftest - INFO -
runtime_test.RustKernel.test_kernel_rust_sample (subunit.RemotedTestCase)
2026-01-31 16:20:41,994 - oe-selftest - INFO - ... FAIL
...
ERROR: linux-yocto-6.16.11+git-r0 do_compile: Execution of
'/srv/pokybuild/yocto-worker/oe-selftest-debian/build/build-st-766138/tmp/work/qemux86_64-poky-linux/linux-yocto/6.16.11+git/temp/run.do_compile.189616'
failed with exit code 1
...
| error: unknown unstable option: `no-jump-tables`
https://autobuilder.yoctoproject.org/valkyrie/#/builders/35/builds/3127
https://autobuilder.yoctoproject.org/valkyrie/#/builders/48/builds/3022
Can you have a look at what is going wrong here?
Hi Mathieu,
This issue was already identified in upstream when building linux Kernel
with rust-1.93.0, They have taken fix to linux kernel v6.18/master.
But it is not present in linux kernel v6.16:
https://github.com/torvalds/linux/commit/789521b4717fd6bd85164ba5c131f621a79c9736
To address this, I will submit a backport of the upstream change to
linux-yocto v6.16/standard/base.
Thanks,
Harish
Thanks,
Mathieu
--
Mathieu Dubois-Briand, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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