https://bugzilla.kernel.org/show_bug.cgi?id=217307 Bug ID: 217307 Summary: windows guest entering boot loop when nested virtualization enabled and hyperv installed Product: Virtualization Version: unspecified Hardware: Intel OS: Linux Status: NEW Severity: high Priority: P1 Component: kvm Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx Reporter: webczat@xxxxxxxxxxx Regression: No Environment: My host is fedora 37, currently running linux 6.2.5, but this is present for a long time. CPU is intel alderlake, core i7 12700h. The os has kvm_intel module loaded with nested=y parameter, so nested virtualization is enabled. The guest vm is a q35 x86_64 vm with cpu=host set, running on qemu version 7.0.0, accel=kvm, smm, uefi, secureboot and tpm enabled. Command line for qemu is attached to the bug. VM is running a windows 11 pro 64 bit os. What happens is that the moment I install any HyperV features on the windows11 os and then reboot, it does not boot again. Basically it self reboots once and goes into recovery. Because I am blind I cannot really say whether it shows some blue screen of death before rebooting, but I actually don't think so. The only thing i can do to make it work is to disable nested virtualization. There is no known workaround which leaves it enabled, unless i disable the vmx cpu feature, but that's not what I want to achieve, my goal is mostly to run/test wsl2 or to play with docker. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
