[coreboot] Intel: After suspend/resume `cbmem -l` fails with `Program cbmem tried to access /dev/mem between f0000->1f0000.`

[Michał Masłowski]

> Does somebody have a coreboot log from serial or USB for cold boot and
> resume, please? I am unable to get one right now, because the docking
> station is not here.

I have logs from EHCI debug: normal boot and resume from suspend to RAM.

>> Using dd, grep and hexdump shows that the coreboot table entry at memory
>> address 0x500 gets zeroed.  /proc/iomem considers that address
>> "reserved".

Guessing from searching the code: smm_setup_structures from
src/southbridge/intel/i82801gx/smi.c overwrote it, called by acpi_resume
in src/arch/x86/boot/acpi.c.  I haven't checked how the (mentioned in
the comment) GNVS relocation or coreboot table writing are done, nor how
it's different when resuming.

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