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Use the vmcb12 control clean field to determine which vmcb12.save registers were marked dirty in order to minimize register copies when switching from L1 to L2. Those vmcb12 registers marked as dirty need to be copied to L0's vmcb02 as they will be used to update the vmcb state cache for the L2 VMRUN. In the case where we have a different vmcb12 from the last L2 VMRUN all vmcb12.save registers must be copied over to L2.save. Tested: kvm-unit-tests kvm selftests Fedora L1 L2 Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Cathy Avery <cavery@redhat.com> Message-Id: <20210301200844.2000-1-cavery@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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.