[coreboot] Re: Intel Atom C2000 SOC - Do they lack Intel ME?

[Matt B]

Hi,

I have heard an unverified rumour that Atom substitutes the ME for an ARM
microcontroller running Trustzone.
If this is the case however, it's possible it's only for bringup, in which
case it's not too much different from the inaccessible micrcontrollers
already present in most x86 silicon.
(eg superio chips with their own baked-in firmware)

It's something worth looking into, but probably not even on the same scale
as the ME.

At the same time, a micro-itx board like this one would be FANTASTIC for a
NAS device, as many NAS-oriented cases with built-in bays are
micro-itx-only.
If such a board existed in coreboot with ECC support (not available in my
AM1I-A) a year ago, my own NAS build would have been quite a bit different.

Sincerely,
    -Matt

On Tue, Dec 3, 2019 at 10:32 AM Kinky Nekoboi 
wrote:
> Hallo Goetz,
>
> thanks for that information.
>
> I am aware of this bug, but i read that Intel released an PCB level
> workaround what hopefully supermicro has applied on my new bought board.
>
> As i have only one board atm what is now in a "Production System" i am
> not able to activly test it but for interesst i would like to take a
> look on this image..
>
> But that pure fact that eart of my storage server has still no ME inside
> makes me happy already.
>
> Am 03.12.19 um 13:25 schrieb Goetz Salzmann:
> > Hi Kinky,
> > > i sadly had to replace KGPE-d16 board for my fileserver to a Supermicro
> > > A1SRi-C2558 because of electric pill ....
> > >
> > > investigating a bit with intelmetool and mecleaner non of them could
> > > found any sign for an ME-region in this board.. so i asking myself if
> > > there is no ME/SPS on the intel C2000 socs, what would make them a DAMN
> > > SEXY platform to port coreboot too.
> >
> > to answer your other question: yes the Intel Rangeley (C2000) is the
> > last/newest SoC what does not include a ME(like) subsystem.
> >
> > Unfortunately the SoC has a fatal hardware bug:
>
> https://www.extremetech.com/computing/244074-intel-atom-c2000-bug-killing-pr...
> > But this hardware bug has resurfaced on some of the later ATOMs aswell.
> >
> > There is a Golden Master Image for coreboot from intel, but it's
> > probably not publicaly available, OTOH if you want to work on Rangely,
> > there should be someone on this list, that can arange for you to get
> > this "drop".
> >
> > Another pointer:
> >      https://mail.coreboot.org/pipermail/coreboot/2017-March/083712.html
> >
> > Cu,
> >      Goetz.
> >
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