[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 #26 from mlevitsk@redhat.com ---
But the question is - did they use nested virtualization on Linux actively and
with vls enabled?


The use case which causes the reboots as I understand is Hyperv enabled
Windows, in which case pretty much the whole Windows is running as a nested VM,
nested to the Hyperv hypervisor.

Once I get my hands on a client Zen4 machine (I only have Zen2 at home), I will
also try to reproduce this but not promises when this will happen. 

Meanwhile I really hope that someone from AMD can take a look a this, and
either confirm that this is or will be fixed with a microcode patch or confirm
that we have to disable vls on the affected CPUs.

Best regards,
       Maxim Levitsky

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