gvh

The issue has been open since at least 2020 so I have no hope it will be solved soon. Not a lot of people are probably using nested virtualization with KVM / Windows. The frustrating thing is that I didn't even know this issue existed before I upgraded my CPU. I would've stayed with AM4 if I knew this would have been an issue.

Found out it was because WSL2 was enabled and nested virtualization is not supported on Raptor Lake. AM4 did support nested virtualization but 13th gen Intel does not. I was able to boot and run the system with the following changes to the config: <cpu mode='custom' match='exact' check='full'> <model fallback='forbid'>Broadwell-noTSX</model> <feature policy='disable' name='hypervisor'/> <feature policy='require' name='vmx'/> <feature policy='disable' name='svm'/> <feature policy='require' name='vme'/> <feature policy='require' name='f16c'/> <feature policy='require' name='rdrand'/> <feature policy='require' name='arat'/> <feature policy='require' name='xsaveopt'/> <feature policy='require' name='abm'/> </cpu> I could start and use my VM without an issue but it was really slow and capped at 4 cores (broadwell architecture?) All of the other cpu models I tried to emulate resulted in a message that the host cpu didn't support some of the features. After a lot of googling found out that this might be an issue in the current Linux kernel and we'll have to wait for a fix. At least I was able to save my VM, after booting I could disable WSL and set my CPU settings to the default settings. I'm now using an Ubuntu VM with remote-ssh in vscode instead of WSL. More info on emulating a CPU to get Hyper-V / WSL2 running: https://www.redpill-linpro.com/techblog/2021/04/07/nested-virtualization-hyper-v-in-qemu-kvm.html

I upgraded the motherboard of my Unraid server (5700G to 13600k) now some of my Windows VM's don't boot anymore. The weird thing is that one of the VM's boots without an issue but two other vm's don't. After starting the VM, its stuck at this screen: If I attach the vhd to a Fedora live CD I can mount the disk without an issue and browse my files. This is the configuration <?xml version='1.0' encoding='UTF-8'?> <domain type='kvm' id='15'> <name>Windows 10 LTSC</name> <uuid>dc313c0b-110a-fc81-94af-a97f54747022</uuid> <metadata> <vmtemplate xmlns="unraid" name="Windows 11" icon="windows11.png" os="windowstpm"/> </metadata> <memory unit='KiB'>16777216</memory> <currentMemory unit='KiB'>16777216</currentMemory> <memoryBacking> <nosharepages/> </memoryBacking> <vcpu placement='static'>9</vcpu> <cputune> <vcpupin vcpu='0' cpuset='0'/> <vcpupin vcpu='1' cpuset='1'/> <vcpupin vcpu='2' cpuset='2'/> <vcpupin vcpu='3' cpuset='4'/> <vcpupin vcpu='4' cpuset='5'/> <vcpupin vcpu='5' cpuset='6'/> <vcpupin vcpu='6' cpuset='8'/> <vcpupin vcpu='7' cpuset='9'/> <vcpupin vcpu='8' cpuset='10'/> </cputune> <resource> <partition>/machine</partition> </resource> <os> <type arch='x86_64' machine='pc-i440fx-7.1'>hvm</type> <loader readonly='yes' type='pflash'>/usr/share/qemu/ovmf-x64/OVMF_CODE-pure-efi-tpm.fd</loader> <nvram>/etc/libvirt/qemu/nvram/dc313c0b-110a-fc81-94af-a97f54747022_VARS-pure-efi-tpm.fd</nvram> </os> <features> <acpi/> <apic/> <hyperv mode='custom'> <relaxed state='on'/> <vapic state='on'/> <spinlocks state='on' retries='8191'/> <vendor_id state='on' value='none'/> </hyperv> </features> <cpu mode='host-passthrough' check='none' migratable='on'> <topology sockets='1' dies='1' cores='9' threads='1'/> <cache mode='passthrough'/> </cpu> <clock offset='localtime'> <timer name='hypervclock' present='yes'/> <timer name='hpet' present='no'/> </clock> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/local/sbin/qemu</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='writeback'/> <source file='/mnt/user/domains/Windows 10 LTSC/vdisk1.img' index='1'/> <backingStore/> <target dev='hdc' bus='virtio'/> <boot order='1'/> <alias name='virtio-disk2'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </disk> <controller type='usb' index='0' model='ich9-ehci1'> <alias name='usb'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x7'/> </controller> <controller type='usb' index='0' model='ich9-uhci1'> <alias name='usb'/> <master startport='0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0' multifunction='on'/> </controller> <controller type='usb' index='0' model='ich9-uhci2'> <alias name='usb'/> <master startport='2'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x1'/> </controller> <controller type='usb' index='0' model='ich9-uhci3'> <alias name='usb'/> <master startport='4'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x2'/> </controller> <controller type='pci' index='0' model='pci-root'> <alias name='pci.0'/> </controller> <controller type='virtio-serial' index='0'> <alias name='virtio-serial0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </controller> <interface type='bridge'> <mac address='52:54:00:d6:4b:da'/> <source bridge='br0'/> <target dev='vnet14'/> <model type='virtio-net'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <source path='/dev/pts/5'/> <target type='isa-serial' port='0'> <model name='isa-serial'/> </target> <alias name='serial0'/> </serial> <console type='pty' tty='/dev/pts/5'> <source path='/dev/pts/5'/> <target type='serial' port='0'/> <alias name='serial0'/> </console> <channel type='unix'> <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/domain-15-Windows 10 LTSC/org.qemu.guest_agent.0'/> <target type='virtio' name='org.qemu.guest_agent.0' state='disconnected'/> <alias name='channel0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> <input type='tablet' bus='usb'> <alias name='input0'/> <address type='usb' bus='0' port='1'/> </input> <input type='mouse' bus='ps2'> <alias name='input1'/> </input> <input type='keyboard' bus='ps2'> <alias name='input2'/> </input> <tpm model='tpm-tis'> <backend type='emulator' version='2.0' persistent_state='yes'/> <alias name='tpm0'/> </tpm> <graphics type='vnc' port='5902' autoport='yes' websocket='5702' listen='0.0.0.0' keymap='en-us'> <listen type='address' address='0.0.0.0'/> </graphics> <audio id='1' type='none'/> <video> <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </memballoon> </devices> <seclabel type='dynamic' model='dac' relabel='yes'> <label>+0:+100</label> <imagelabel>+0:+100</imagelabel> </seclabel> </domain> beastserver-diagnostics-20230515-1504.zip