1 .. SPDX-License-Identifier: GPL-2.0+
3 Verified Boot for Embedded (VBE)
4 ================================
9 VBE provides a standard boot mechanism for embedded systems. If defines
10 how firmware and Operating Systems are located, updated and verified.
12 Within U-Boot, one or more VBE bootmeths implement the boot logic. For example,
13 the vbe-simple bootmeth handles finding the firmware (e.g. in MMC) and starting
14 it. Typically the bootmeth is started up in VPL and controls which SPL and
15 U-Boot binaries are loaded.
17 A 'vbe' command provides access to various aspects of VBE's operation, including
18 listing methods and getting the status for a method.
20 For a detailed overview of VBE, see vbe-intro_. A fuller description of
21 bootflows is at vbe-bootflows_ and the firmware-update mechanism is described at
24 .. _vbe-intro: https://docs.google.com/document/d/e/2PACX-1vQjXLPWMIyVktaTMf8edHZYDrEvMYD_iNzIj1FgPmKF37fpglAC47Tt5cvPBC5fvTdoK-GA5Zv1wifo/pub
25 .. _vbe-bootflows: https://docs.google.com/document/d/e/2PACX-1vR0OzhuyRJQ8kdeOibS3xB1rVFy3J4M_QKTM5-3vPIBNcdvR0W8EXu9ymG-yWfqthzWoM4JUNhqwydN/pub
26 .. _vbe-fwupdate: https://docs.google.com/document/d/e/2PACX-1vTnlIL17vVbl6TVoTHWYMED0bme7oHHNk-g5VGxblbPiKIdGDALE1HKId8Go5f0g1eziLsv4h9bocbk/pub