diff options
| author | Simon Glass | 2022-04-30 00:56:52 -0600 |
|---|---|---|
| committer | Tom Rini | 2022-05-02 09:58:13 -0400 |
| commit | f86ca5ad8f780d306e79d49ffe4f5cf1edef37b9 (patch) | |
| tree | a2eac09d5cb3376288fc135b1563abb1af7bbb16 /doc | |
| parent | d3eba95a7e9b6b89404a3ddb2945f03cff4effb4 (diff) | |
Introduce Verifying Program Loader (VPL)
Add support for VPL, a new phase of U-Boot. This runs after TPL. It is
responsible for selecting which SPL binary to run, based on a
verified-boot process.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/develop/spl.rst | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/doc/develop/spl.rst b/doc/develop/spl.rst index 1059b2fb9c0..aec7b562faa 100644 --- a/doc/develop/spl.rst +++ b/doc/develop/spl.rst @@ -83,7 +83,12 @@ U-Boot Phases U-Boot boots through the following phases: TPL - Very early init, as tiny as possible. This loads SPL. + Very early init, as tiny as possible. This loads SPL (or VPL if enabled). + +VPL + Optional verification step, which can select one of several SPL binaries, + if A/B verified boot is enabled. Implementation of the VPL logic is + work-in-progress. For now it just boots into SPL. SPL Secondary program loader. Sets up SDRAM and loads U-Boot proper. It may also |