Linux 5.15 Further Tunes Its RISC-V Support

Written by Michael Larabel in RISC-V on 6 September 2021 at 03:13 PM EDT. 6 Comments
The RISC-V architecture updates have landed in the Linux 5.15 kernel with more software features now being supported.

RISC-V with Linux 5.15 supports new features like the Undefined Behavior Sanitizer (UBSan) now working on the architecture for detecting undefined behavior within the kernel. There is also now support for PC-relative instructions in KProbes, support for the hlt/nohlt kernel command-line options, and a lot of clean-ups.

Also significant for RISC-V with Linux 5.15 is now allowing allocating gigantic hugepages via the CMA allocator and support for hugepage migration.

The full list of RISC-V changes sent in so far for Linux 5.15 can be found via this pull.
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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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