On Mon, Mar 18, 2024 at 06:08:55PM +0100, Michal Suchánek wrote:

On Mon, Mar 18, 2024 at 10:50:49PM +1100, Michael Ellerman wrote:

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Michael Ellerman [off-list ref] writes:

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Michal Suchánek [off-list ref] writes:

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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

Attached.

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That should probably show where it's bailing out.

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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?

I am able to load the module successfully on a P10 running v6.8.0.

Of course, it's not a Power10. Otherwise the Power10-specific chacha
implementation would load.

Thanks

Michal