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README.md: Boot Guard CAUTION section added to Standalone part. #29

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Merged
mkopec merged 4 commits into from
Sep 19, 2025
Merged

README.md: Boot Guard CAUTION section added to Standalone part. #29

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README.md: Boot Guard CAUTION section added to Standalone part.
DonVasyl Sep 18, 2025
347a44f
README.md: CAUTION against smbios command changed to admonition.
DonVasyl Sep 18, 2025
e17c2f9
README.md: admonition new line added.
DonVasyl Sep 18, 2025
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README.md: admonition syntax changed.
DonVasyl Sep 18, 2025
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7 changes: 7 additions & 0 deletions README.md
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Expand Up @@ -105,6 +105,13 @@ This is a [known issue](https://github.com/Dasharo/dcu/issues/17).
The script will save the UUID and Serial Number to the COREBOOT region and the
logo to BOOTSPLASH region.

> [!WARNING]
> CAUTION: Using `smbios` subcommand to modify SMBIOS data in a firmware image is
> allowed only on images without Boot Guard provisioning. Official Dasharo images
> containing Boot Guard provisioning are marked with `_btg_provisioned` image file
> name portion. Flashing `_btg_provisioned` image with modified SMBIOS data will
> make the platform unusable & will require an external flashing recovery procedure.

NOTE: Not all Dasharo platform support such customizations.

NOTE: if you update the firmware by rewriting whole BIOS region, the data will
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