[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

blake (blake@volian.org) changed:

           What    |Removed                     |Added
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                 CC|                            |blake@volian.org

--- Comment #13 from blake (blake@volian.org) ---
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

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