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e7b7bdea77
Let the MMU deal with the SPTE masks to avoid splitting the logic and knowledge across the MMU and VMX. The SPTE masks that are used for EPT are very, very tightly coupled to the MMU implementation. The use of available bits, the existence of A/D types, the fact that shadow_x_mask even exists, and so on and so forth are all baked into the MMU implementation. Cross referencing the params to the masks is also a nightmare, as pretty much every param is a u64. A future patch will make the location of the MMU_WRITABLE and HOST_WRITABLE bits MMU specific, to free up bit 11 for a MMU_PRESENT bit. Doing that change with the current kvm_mmu_set_mask_ptes() would be an absolute mess. No functional change intended. Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20210225204749.1512652-18-seanjc@google.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.