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Protected VMs have more restricted features that need to be trapped. Moreover, the host should not be trusted to set the appropriate trapping registers and their values. Initialize the trapping registers, i.e., hcr_el2, mdcr_el2, and cptr_el2 at EL2 for protected guests, based on the values of the guest's feature id registers. No functional change intended as trap handlers introduced in the previous patch are still not hooked in to the guest exit handlers. Reviewed-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Fuad Tabba <tabba@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211010145636.1950948-9-tabba@google.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.