diff options
| author | Tom Rini <[email protected]> | 2022-05-02 19:02:44 -0400 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2022-05-02 19:02:44 -0400 |
| commit | edb6982b5800603a67ff3710ef074ff7ac86e5ea (patch) | |
| tree | fc34fe0a38d6f3884c60993ce06fb0f58536d60a /dts | |
| parent | 2406a91734eb4eeeb50fdfaeff65d0b7f464dba9 (diff) | |
| parent | a31eff3015afc80429e2734781eaf52e48ab6663 (diff) | |
Merge branch '2022-05-02-add-verifying-program-loader'
To quote the author:
U-Boot provides a verified-boot feature based around FIT, but there is
no standard way of implementing it for a board. At present the various
required pieces must be built up separately, to produce a working
implementation. In particular, there is no built-in support for selecting
A/B boot or recovery mode.
This series introduces VPL, a verified program loader phase for U-Boot.
Its purpose is to run the verified-boot process and decide which SPL
binary should be run. It is critical that this decision happens before
SPL runs, since SPL sets up SDRAM and we need to be able to update the
SDRAM-init code in the field.
Adding VPL into the boot flow provides a standard place to implement
verified boot. This series includes the phase itself, some useful Kconfig
options and a sandbox_vpl build for sandbox. No verfied-boot support is
provided in this series.
Most of the patches in this series are fixes and improvements to docs and
various Kconfig conditions for SPL.
Diffstat (limited to 'dts')
| -rw-r--r-- | dts/Kconfig | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/dts/Kconfig b/dts/Kconfig index b19912d10dd..f1d05cc0803 100644 --- a/dts/Kconfig +++ b/dts/Kconfig @@ -65,6 +65,15 @@ config TPL_OF_CONTROL which is not enough to support device tree. Enable this option to allow such boards to be supported by U-Boot TPL. +config VPL_OF_CONTROL + bool "Enable run-time configuration via Device Tree in VPL" + depends on VPL && OF_CONTROL + default y if SPL_OF_CONTROL + help + Some boards use device tree in U-Boot but only have 4KB of SRAM + which is not enough to support device tree. Enable this option to + allow such boards to be supported by U-Boot VPL. + config OF_LIVE bool "Enable use of a live tree" depends on DM && OF_CONTROL @@ -523,4 +532,12 @@ config TPL_OF_PLATDATA_DRIVER_RT endif +config VPL_OF_REAL + def_bool y + help + Indicates that a real devicetree is available which can be accessed + at runtime. This means that dev_read_...() functions can be used to + read data from the devicetree for each device. This is true if + TPL_OF_CONTROL is enabled and not TPL_OF_PLATDATA + endmenu |