| commit | 7e7cc1a8c9a87e33bd772e8526734c7a82ec2db7 | [log] [tgz] |
|---|---|---|
| author | Julius Werner <jwerner@chromium.org> | Wed Aug 11 18:19:23 2021 -0700 |
| committer | Felix Held <felix-coreboot@felixheld.de> | Fri Dec 03 21:20:35 2021 +0000 |
| tree | c091beebe657af44f3800402645fa8d257eaab8e | |
| parent | c75d846971c2fd96c989a7f8a14011bb70866409 [diff] |
cbfs | tspi: Join hash calculation for verification and measurement This patch moves the CBFS file measurement when CONFIG_TPM_MEASURED_BOOT is enabled from the lookup step into the code where a file is actually loaded or mapped from flash. This has the advantage that CBFS routines which just look up a file to inspect its metadata (e.g. cbfs_get_size()) do not cause the file to be measured twice. It also removes the existing inefficiency that files are loaded twice when measurement is enabled (once to measure and then again when they are used). When CBFS verification is enabled and uses the same hash algorithm as the TPM, we are even able to only hash the file a single time and use the result for both purposes. Signed-off-by: Julius Werner <jwerner@chromium.org> Change-Id: I70d7066c6768195077f083c7ffdfa30d9182b2b7 Reviewed-on: https://review.coreboot.org/c/coreboot/+/59681 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Raul Rangel <rrangel@chromium.org>
coreboot is a Free Software project aimed at replacing the proprietary BIOS (firmware) found in most computers. coreboot performs a little bit of hardware initialization and then executes additional boot logic, called a payload.
With the separation of hardware initialization and later boot logic, coreboot can scale from specialized applications that run directly firmware, run operating systems in flash, load custom bootloaders, or implement firmware standards, like PC BIOS services or UEFI. This allows for systems to only include the features necessary in the target application, reducing the amount of code and flash space required.
coreboot was formerly known as LinuxBIOS.
After the basic initialization of the hardware has been performed, any desired "payload" can be started by coreboot.
See https://www.coreboot.org/Payloads for a list of supported payloads.
coreboot supports a wide range of chipsets, devices, and mainboards.
For details please consult:
ANY_TOOLCHAIN Kconfig option if you're feeling lucky (no support in this case).Optional:
make menuconfig and make nconfig)Please consult https://www.coreboot.org/Build_HOWTO for details.
If you want to test coreboot without any risks before you really decide to use it on your hardware, you can use the QEMU system emulator to run coreboot virtually in QEMU.
Please see https://www.coreboot.org/QEMU for details.
Further details on the project, a FAQ, many HOWTOs, news, development guidelines and more can be found on the coreboot website:
You can contact us directly on the coreboot mailing list:
https://www.coreboot.org/Mailinglist
The copyright on coreboot is owned by quite a large number of individual developers and companies. Please check the individual source files for details.
coreboot is licensed under the terms of the GNU General Public License (GPL). Some files are licensed under the "GPL (version 2, or any later version)", and some files are licensed under the "GPL, version 2". For some parts, which were derived from other projects, other (GPL-compatible) licenses may apply. Please check the individual source files for details.
This makes the resulting coreboot images licensed under the GPL, version 2.