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Oliver Upton
4bf3693d36
KVM's interrupt infrastructure is dodgy at best, allowing for some ugly 'off label' usage of the various UAPIs. In one example, userspace can change the routing entry of a particular "GSI" after configuring irqbypass with KVM_IRQFD. KVM/arm64 is oblivious to this, and winds up preserving the stale translation in cases where vLPIs are configured. Honor userspace's intentions and tear down the vLPI mapping if affected by a "GSI" routing change. Make no attempt to reconstruct vLPIs if the new target is an MSI and just fall back to software injection. Tested-by: Sweet Tea Dorminy <sweettea-kernel@dorminy.me> Signed-off-by: Oliver Upton <oliver.upton@linux.dev> Link: https://lore.kernel.org/r/20250523194722.4066715-5-oliver.upton@linux.dev 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.