netdev - Re: Cannot load wireguard module

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Message-ID: <87jzm32h7q.fsf@mail.lhotse>
Date: Sat, 16 Mar 2024 10:44:25 +1100
From: Michael Ellerman <mpe@...erman.id.au>
To: Michal Suchánek <msuchanek@...e.de>,
 dtsen@...ux.ibm.com
Cc: linuxppc-dev@...ts.ozlabs.org, wireguard@...ts.zx2c4.com, "Jason A.
 Donenfeld" <Jason@...c4.com>, netdev@...r.kernel.org
Subject: Re: Cannot load wireguard module

Michal Suchánek <msuchanek@...e.de> writes:
> Hello,
>
> I cannot load the wireguard module.
>
> Loading the module provides no diagnostic other than 'No such device'.
>
> Please provide maningful diagnostics for loading software-only driver,
> clearly there is no particular device needed.

Presumably it's just bubbling up an -ENODEV from somewhere.

Can you get a trace of it?

Something like:

  # trace-cmd record -p function_graph -F modprobe wireguard

That should probably show where it's bailing out.

> jostaberry-1:~ # uname -a
> Linux jostaberry-1 6.8.0-lp155.8.g7e0e887-default #1 SMP Wed Mar 13 09:02:21 UTC 2024 (7e0e887) ppc64le ppc64le ppc64le GNU/Linux
> jostaberry-1:~ # modprobe wireguard
> modprobe: ERROR: could not insert 'wireguard': No such device
> jostaberry-1:~ # modprobe -v wireguard
> insmod /lib/modules/6.8.0-lp155.8.g7e0e887-default/kernel/arch/powerpc/crypto/chacha-p10-crypto.ko.zst 
> modprobe: ERROR: could not insert 'wireguard': No such device

What machine is this? A Power10?

cheers