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docs(imx8m): update for measured boot for imx8mm 

Signed-off-by: Ying-Chun Liu (PaulLiu) <paulliu@debian.org>
Change-Id: Ib313dc1ffac2fc5d04e0779c9f059236a71e65e7
This commit is contained in:
Ying-Chun Liu (PaulLiu) 2021-11-15 16:13:10 +08:00
parent cb2c4f93c1
commit 10bf3d7ca3
1 changed files with 8 additions and 0 deletions
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docs/plat/imx8m.rst
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@ -60,3 +60,11 @@ BL2 will be in the FIT image and SPL will verify it.
All of the BL3x will be put in the FIP image. BL2 will verify them.
In U-boot we turn on the UEFI secure boot features so it can verify
grub. And we use grub to verify linux kernel.
Measured Boot
-------------
When setting MEASURED_BOOT=1 on imx8mm we can let TF-A generate event logs
with a DTB overlay. The overlay will be put at PLAT_IMX8M_DTO_BASE with
maximum size PLAT_IMX8M_DTO_MAX_SIZE. Then in U-boot we can apply the DTB
overlay and let U-boot to parse the event log and update the PCRs.