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c3119ae45d
Use RCU to safely walk the stage-2 page tables in parallel. Acquire and release the RCU read lock when traversing the page tables. Defer the freeing of table memory to an RCU callback. Indirect the calls into RCU and provide stubs for hypervisor code, as RCU is not available in such a context. The RCU protection doesn't amount to much at the moment, as readers are already protected by the read-write lock (all walkers that free table memory take the write lock). Nonetheless, a subsequent change will futher relax the locking requirements around the stage-2 MMU, thereby depending on RCU. Signed-off-by: Oliver Upton <oliver.upton@linux.dev> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20221107215644.1895162-9-oliver.upton@linux.dev
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 Restructured Text 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.