[coreboot] Finding whether the BIOS is coreboot or not

Stefan Reinauer stefan.reinauer at coreboot.org
Sat Aug 1 00:48:14 CEST 2015


* ron minnich <rminnich at gmail.com> [150718 18:10]:
> Could you also look for LBIO in the e and f segments?

Since we moved the coreboot tables out of e and f you won't find
anything like that anymore.

1. Use cbmem tool
2. Dump coreboot table with nvramtool
3. dmidecode
4. ACPI table vendor
5. flashrom -r and check the image for CBFS, ID and master header

Stefan

> On Sat, Jul 18, 2015 at 12:34 AM Patrick Georgi <pgeorgi at google.com> wrote:
> 
>     2015-07-18 9:03 GMT+02:00 Kevin Wilson <wkevils at gmail.com>:
>     > Is there a way, from a device running Linux,  to which I have access
>     > to the command line, to know
>     > whether the BIOS is coreboot or not ? by some utility, or by some sysfs
>     entry ?
>     We usually have coreboot related vendor names for ACPI tables (eg.
>     dsdt table id 'COREBOOT'). Those are visible early on in dmesg, I
>     think.
>     Also our cbmem utility (coreboot source tree, util/cbmem) can print a
>     coreboot specific table's content.
> 
>     Neither of these are guaranteed to be around (it would be possible to
>     cloak things thoroughly), but it's likely that they are on coreboot,
>     and pretty much non-existent otherwise.
> 
> 
>     Patrick
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