6eeb4ef049
Currently, we are overloading SPTE_SPECIAL_MASK to mean both "A/D bits unavailable" and MMIO, where the difference between the two is determined by mio_mask and mmio_value. However, the next patch will need two bits to distinguish availability of A/D bits from write protection. So, while at it give MMIO its own bit pattern, and move the two bits from bit 62 to bits 52..53 since Intel is allocating EPT page table bits from the top. Reviewed-by: Junaid Shahid <junaids@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.