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ccf4c1d15d
When clearing CONSTANT_TSC during CPUID emulation due to a Hyper-V quirk, use feature_bit() instead of SF() to ensure the bit is actually cleared. SF() evaluates to zero if the _host_ doesn't support the feature. I.e. KVM could keep the bit set if userspace advertised CONSTANT_TSC despite it not being supported in hardware. Note, translating from a scattered feature to a the hardware version is done by __feature_translate(), not SF(). The sole purpose of SF() is to check kernel support for the scattered feature, *before* translation. Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com> Link: https://lore.kernel.org/r/20241128013424.4096668-2-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@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 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.