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| Filename | Latest commit message | Latest commit date |
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2f055947ae
The VMX module parameter to control the L1D flush should become writeable. The MSR list is set up at VM init per guest VCPU, but the run time switching is based on a static key which is global. Toggling the MSR list at run time might be feasible, but for now drop this optimization and use the regular MSR write to make run-time switching possible. The default mitigation is the conditional flush anyway, so for extra paranoid setups this will add some small overhead, but the extra code executed is in the noise compared to the flush itself. Aside of that the EPT disabled case is not handled correctly at the moment and the MSR list magic is in the way for fixing that as well. If it's really providing a significant advantage, then this needs to be revisited after the code is correct and the control is writable. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Jiri Kosina <jkosina@suse.cz> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com> Link: https://lkml.kernel.org/r/20180713142322.516940445@linutronix.de |
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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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.