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Marc Zyngier
493b01de72
When an AT S1E* operation fails, we need to report whether the translation failed at S2, and whether this was during a S1 PTW. But these two bits are not independent. PAR_EL1.PTW can only be set of PAR_EL1.S is also set, and PAR_EL1.S can only be set on its own when the full S1 PTW has succeeded, but that the access itself is reporting a fault at S2. As a result, it makes no sense to carry both ptw and s2 as parameters to fail_s1_walk(), and they should be unified. This fixes a number of cases where we were reporting PTW=1 *and* S=0, which makes no sense. Link: https://lore.kernel.org/r/20250422122612.2675672-2-maz@kernel.org Signed-off-by: Marc Zyngier <maz@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.