2f9469484a
s390x supports most BPF atomics using single instructions, which makes implementing arena support a matter of adding arena address to the base register (unfortunately atomics do not support index registers), and wrapping the respective native instruction in probing sequences. An exception is BPF_XCHG, which is implemented using two different memory accesses and a loop. Make sure there is enough extable entries for both instructions. Compute the base address once for both memory accesses. Since on exception we need to land after the loop, emit the nops manually. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20240701234304.14336-10-iii@linux.ibm.com
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.