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vbe: Add some documentation

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Add a few links to documents about Verified Boot for Embedded (VBE).
These will be expanded as development proceeds.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2022-07-30 15:52:03 -06:00 committed by Tom Rini
parent f5003e0791
commit 915458e148
3 changed files with 28 additions and 0 deletions
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doc/develop/bootstd.rst
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@ -32,6 +32,7 @@ way to boot with U-Boot. The feature is extensible to different Operating
Systems (such as Chromium OS) and devices (beyond just block and network
devices). It supports EFI boot and EFI bootmgr too.
Finally, standard boot supports the operation of :doc:`vbe`.
Bootflow
--------

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doc/develop/index.rst
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@ -39,6 +39,7 @@ Implementation
smbios
spl
uefi/index
vbe
version
Debugging

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doc/develop/vbe.rst Normal file
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@ -0,0 +1,26 @@
.. SPDX-License-Identifier: GPL-2.0+
Verified Boot for Embedded (VBE)
================================
Introduction
------------
VBE provides a standard boot mechanism for embedded systems. If defines
how firmware and Operating Systems are located, updated and verified.
Within U-Boot, one or more VBE bootmeths implement the boot logic. For example,
the vbe-simple bootmeth handles finding the firmware (e.g. in MMC) and starting
it. Typically the bootmeth is started up in VPL and controls which SPL and
U-Boot binaries are loaded.
A 'vbe' command provides access to various aspects of VBE's operation, including
listing methods and getting the status for a method.
For a detailed overview of VBE, see vbe-intro_. A fuller description of
bootflows is at vbe-bootflows_ and the firmware-update mechanism is described at
vbe-fwupdate_.
.. _vbe-intro: https://docs.google.com/document/d/e/2PACX-1vQjXLPWMIyVktaTMf8edHZYDrEvMYD_iNzIj1FgPmKF37fpglAC47Tt5cvPBC5fvTdoK-GA5Zv1wifo/pub
.. _vbe-bootflows: https://docs.google.com/document/d/e/2PACX-1vR0OzhuyRJQ8kdeOibS3xB1rVFy3J4M_QKTM5-3vPIBNcdvR0W8EXu9ymG-yWfqthzWoM4JUNhqwydN/pub
.. _vbe-fwupdate: https://docs.google.com/document/d/e/2PACX-1vTnlIL17vVbl6TVoTHWYMED0bme7oHHNk-g5VGxblbPiKIdGDALE1HKId8Go5f0g1eziLsv4h9bocbk/pub