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Peilin Ye says: ==================== bpf, riscv64: Support load-acquire and store-release instructions Hi all! Patchset [1] introduced BPF load-acquire (BPF_LOAD_ACQ) and store-release (BPF_STORE_REL) instructions, and added x86-64 and arm64 JIT compiler support. As a follow-up, this v2 patchset supports load-acquire and store-release instructions for the riscv64 JIT compiler, and introduces some related selftests/ changes. Specifically: * PATCH 1 makes insn_def_regno() handle load-acquires properly for bpf_jit_needs_zext() (true for riscv64) architectures * PATCH 2, 3 from Andrea Parri add the actual support to the riscv64 JIT compiler * PATCH 4 optimizes code emission by skipping redundant zext instructions inserted by the verifier * PATCH 5, 6 and 7 are minor selftest/ improvements * PATCH 8 enables (non-arena) load-acquire/store-release selftests for riscv64 v1: https://lore.kernel.org/bpf/cover.1745970908.git.yepeilin@google.com/ Changes since v1: * add Acked-by:, Reviewed-by: and Tested-by: tags from Lehui and Björn * simplify code logic in PATCH 1 (Lehui) * in PATCH 3, avoid changing 'return 0;' to 'return ret;' at the end of bpf_jit_emit_insn() (Lehui) Please refer to individual patches for details. Thanks! [1] https://lore.kernel.org/all/cover.1741049567.git.yepeilin@google.com/ ==================== Link: https://patch.msgid.link/cover.1746588351.git.yepeilin@google.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.