nested virt enabled, but wsl fails ? bug or "feature" ?

[superpower]

Trying to run wsl on a win11 guest always throws

wsl: Nested virtualization is not supported on this machine.

proxmox itself is installed on an Epyc 7543 and bios nested virt is enabled (supermicro board), as confirmed :

cat /sys/module/kvm_amd/parameters/nested
1

Cpu passed as "host" to the vm, shows Virtualization: Enabled in task manager, I am able to install Hyper-V inside the host using the windows features on/off (whereas before setting cpu=host, it was grayed out) but wsl still throws that warning/error. Is this a bug ? a feature ?
I am confused.

Update - seems to be an AMD BUG, identical VPS configuration works flawlessly on a Xeon(R) Gold 5412U https://forum.proxmox.com/threads/n...-wsl-fails-bug-or-feature.165243/#post-765668

 

[fba]

Seems like you're not the first to see this issue of wsl: https://forum.proxmox.com/threads/w...not-supported-on-this-machine-message.158758/

 

[superpower]

Interesting.
Note - win10 works.
I will install this on a xeon gold host, maybe it's an AMD related bug

 

[superpower]

Works perfectly fine on a Intel(R) Xeon(R) Gold 5412U system
Perhaps it's a qemu issue .
Proxmox team, is this supposed to be a proxmox issue or should i report to Qemu ?
Waiting for your advice

 

[fba]

It might be best to file a bug at https://bugzilla.proxmox.com instead, otherwise your question might get overlooked.

 

[superpower]

Done.
for future reference to any who may encounter this problem, this is the link where hopefully somebody will come up with a fix: https://bugzilla.proxmox.com/show_bug.cgi?id=6349