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05b9405f2f
The virtual mapping and "GSI" routing of a particular vLPI is subject to change in response to the guest / userspace. This can be pretty annoying to deal with when KVM needs to track the physical state that's managed for vLPI direct injection. Make vgic_v4_unset_forwarding() resilient by using the host IRQ to resolve the vgic IRQ. Since this uses the LPI xarray directly, finding the ITS by doorbell address + grabbing it's its_lock is no longer necessary. Note that matching the right ITS / ITE is already handled in vgic_v4_set_forwarding(), and unless there's a bug in KVM's VGIC ITS emulation the virtual mapping that should remain stable for the lifetime of the vLPI mapping. Tested-by: Sweet Tea Dorminy <sweettea-kernel@dorminy.me> Signed-off-by: Oliver Upton <oliver.upton@linux.dev> Link: https://lore.kernel.org/r/20250523194722.4066715-4-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.