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

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

Sean (animusnull@fastmail.com) changed:

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                 CC|                            |animusnull@fastmail.com

--- Comment #39 from Sean (animusnull@fastmail.com) ---
I've been encountering random reboots with a 7950X as well, oddly no nested
virtualization. I just came across this via a phoronix article, and tried the
kvm_amd.vls=0 argument I've hit my third reboot today after trying to amend the
flag. I'm going to try bringing in the patch  today.



I have two virtual machines I use. Neither is using nested virtualization 
- Windows 11 with VFIO and pcie passthrough
- Linux guest with spice and opengl via virgl



Even with just the Linux guest it crashes 



My main distribution is NixOs with 6.6. But I've tried Fedora, Arch and Ubuntu
with 6.6,6.8.6.10 and 6.11. I've disable power saving, and a number of
different tweaks. 



I've also swapped memory, motherboard, disks and power supply. Updated bios,
etc. The system started showing instability after I bumped to 6.X, and updating
to the bios post voltage issues with the zen 4 cpus. I was on 5.1X for a while
due to bugs on gpu initialization while using vfio.

There is a note on iGPU which I'm using, and experiencing a number of issues
with. I won't go into that, and expect it's due to 6.6, which I'm locked to
right now due to zfs.

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