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f4c5ca9850
Set CR4.PSE in secondary_startup_64: the Intel SDM is clear that it does
not matter whether it's 0 or 1 when 4-level-pts are enabled, but it's
distracting to find CR4 different on BSP and auxiliaries - on x86_64,
BSP alone got to add the PSE bit, in probe_page_size_mask().
Peter Zijlstra adds:
"I think the point is that PSE bit is completely without
meaning in long mode.
But yes, having the same CR4 bits set across BSP and APs is
definitely sane."
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/103ad03a-8c93-c3e2-4226-f79af4d9a074@google.com
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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.