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With nVHE, the host currently creates all stage 1 hypervisor mappings at EL1 during boot, installs them at EL2, and extends them as required (e.g. when creating a new VM). But in a world where the host is no longer trusted, it cannot have full control over the code mapped in the hypervisor. In preparation for enabling the hypervisor to create its own stage 1 mappings during boot, introduce an early page allocator, with minimal functionality. This allocator is designed to be used only during early bootstrap of the hyp code when memory protection is enabled, which will then switch to using a full-fledged page allocator after init. Acked-by: Will Deacon <will@kernel.org> Signed-off-by: Quentin Perret <qperret@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20210319100146.1149909-11-qperret@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.