[coreboot] Re: Supermicro X11SSH-LN4F PCI-e bifurcation?

[Kyösti Mälkki]

On Tue, Apr 11, 2023 at 11:10 PM Tomas  wrote:
> Hi,
> I installed Coreboot with SeaBIOS on a Supermicro X11SSH-LN4F.
> The stock BIOS can read two NVMe drives in a Dual m.2 splitter card inserted in the middle slot 5 on the motherboard.
> But coreboot can not. In the coreboot nconfig menu there is no setting that will enable bifurcation of the x8 slot to x4x4.
>
> Is this something that is configurable in any way?

HI Tomas

The patch below might give you directions or ideas.

I don't have the hardware in question, so mostly guessing based on the
comments in the file. If you have lspci output from OEM boot, it could
help.

Kyösti