86df79275d
The measurements for confidential computing has been introduced in the commit 4c76565b6 (efi/tpm: Add EFI_CC_MEASUREMENT_PROTOCOL support). Recently the patch 30708dfe3 (tpm: Disable the tpm verifier if the TPM device is not present) has been introduced to optimize the memory usage when a TPM device is not available on platforms. This fix prevents the tpm module to be loaded on confidential computing platforms, e.g. Intel machines with TDX enabled, where the TPM device is not available. In this patch, we propose to load the tpm module for this use case by generalizing the tpm feature detection in order to cover CC platforms. Basically, we do it by detecting the availability of the EFI_CC_MEASUREMENT_PROTOCOL EFI protocol. Fixes: https://savannah.gnu.org/bugs/?65821 Fixes: 30708dfe3 (tpm: Disable the tpm verifier if the TPM device is not present) Signed-off-by: Hector Cao <hector.cao@canonical.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. See the file MAINTAINERS for information about the GRUB maintainers, etc. If you found a security vulnerability in the GRUB please check the SECURITY file to get more information how to properly report this kind of bugs to the maintainers. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'