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fd2b165ce2
When a vcpu is accessing *its own* redistributor's SGIs/PPIs, there is no point in doing a stop-the-world operation. Instead, we can just let the access occur as we do with GICv2. This is a very minor optimisation for a non-nesting guest, but a potentially major one for a nesting L1 hypervisor which is likely to access the emulated registers pretty often (on each vcpu switch, at the very least). Reported-by: Ganapatrao Kulkarni <gankulkarni@os.amperecomputing.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230112154840.1808595-1-maz@kernel.org Signed-off-by: Oliver Upton <oliver.upton@linux.dev> |
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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.