Better way of checking fuse state

[PLangowski]

The problem you're addressing (if any)

Currently the fuse state of a platform is checked by looking at the HFSTS6 register available in /sys/class/mei/mei0/fw_status. However, on some platforms that file does not exist. In that case DTS cannot determine if the platform is fused and can't attempt to flash Dasharo safely. That situation has happened on MinnowBoard Turbot and may happen on other platforms.

Describe the solution you'd like

An alternative way of checking the fuse state, which will give us a definitive answer.

Where is the value to a user, and who might that user be?

No response

Describe alternatives you've considered

No response

Additional context

No response

[mkopec]

That's going to be difficult, there is no more direct interface to check ME fusing status than to ask the ME via FWSTS

Unless maybe the existing BIOS populates SMBIOS type 14 correctly like @miczyg1 tried to do for Dasharo here: https://github.com/Dasharo/coreboot/pull/453/files