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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. 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 In U-boot we turn on the UEFI secure boot features so it can verify
grub. And we use grub to verify linux kernel. 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.