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This sets the recently introduced PCD PcdDxeNxMemoryProtectionPolicy to a value that protects all memory regions except code regions against inadvertent execution. Note that this does not [yet] protect EfiLoaderData regions, due to compatibility issues with shim and GRUB. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Tested-by: Laszlo Ersek <lersek@redhat.com>