[Bug 219009] Random host reboots on Ryzen 7000/8000 using nested VMs (vls suspected)

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=219009

--- Comment #14 from h4ck3r (michal.litwinczuk@op.pl) ---
(In reply to blake from comment #13)
> I recently experienced this. I built a proxmox cluster with 7950x. Every
> node that I tested on would hard reset with no logs when a VM was doing
> nested virtualization.
> 
> Our CI testing uses VMs, and putting the CI in a VM itself makes it pretty
> easy to reproduce, just takes some time.
> 
> Setting kvm_amd.vls=0 seems to have resolved the issue, we had zero node
> resets today and I was trying to force them.
> 
> Kernel is Proxmox's 6.8.12-1-pve.
> 
> Thanks,
> Blake

Disabling vls does help with crashes, but has too much performance penalty.
In my case it would lock gpu utilization at 40% max. (proxmox win10/11 hyperv
enabled)

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