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2bfc654b89
To anyone who has played with FEAT_NV, it is obvious that the level of performance is rather low due to the trap amplification that it imposes on the host hypervisor. FEAT_NV2 solves a number of the problems that FEAT_NV had. It also turns out that all the existing hardware that has FEAT_NV also has FEAT_NV2. Finally, it is now allowed by the architecture to build FEAT_NV2 *only* (as denoted by ID_AA64MMFR4_EL1.NV_frac), which effectively seals the fate of FEAT_NV. Restrict the NV support to NV2, and be done with it. Nobody will cry over the old crap. NV_frac will eventually be supported once the intrastructure is ready. Reviewed-by: Oliver Upton <oliver.upton@linux.dev> Signed-off-by: Marc Zyngier <maz@kernel.org> |
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| README | ||
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.