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In preparation for other uses of the cc_platform_has() function besides AMD's memory encryption support, selectively build the AMD memory encryption architecture override functions only when CONFIG_AMD_MEM_ENCRYPT=y. These functions are: - early_memremap_pgprot_adjust() - arch_memremap_can_ram_remap() Additionally, routines that are only invoked by these architecture override functions can also be conditionally built. These functions are: - memremap_should_map_decrypted() - memremap_is_efi_data() - memremap_is_setup_data() - early_memremap_is_setup_data() And finally, phys_mem_access_encrypted() is conditionally built as well, but requires a static inline version of it when CONFIG_AMD_MEM_ENCRYPT is not set. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20210928191009.32551-2-bp@alien8.de
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.