Nested virtualization not working: Processor does not support VMX operation

[alexanderwwagner]

Describe the Bug
I try to use qemu with haxm on windows host to run FreeBSD as guest.
For my project I have to use bhyve as hypervisor to run some virtualmachines within FreeBSD.
If I try to load the vmm kernel module I get the following error.
If I try the same procedure with VmWare it works without any problems.
If I try it on a linux host with kvm instead of haxm it works without any problems.

# kldload vmm
vmx_modinit: processor does not support VMX operation
module_register_init: MOD_LOAD (vmm, 0xffffffff82c04200, 0) error 6
driver bug: Unable to set devclass (class: fdc devname: (unknown))

Are there at the moment some problems with nested virtualization?

Summary:

Host Environment

• HAXM version: haxm-windows_v7_7_1

• Host OS version: Windows 10 Pro 22H2 19045.2251
• Host OS architecture: x86_64
• Host CPU model: Intel(R) Core(TM) i5-8300H CPU @ 2.30GHz 2.30 GHz
• Host RAM size: 16GB

Guest Environment

• Guest OS version: FreeBSD13
• Guest OS architecture: x86_64

To Reproduce

qemu-system-x86_64.exe -m 1G -smp 2 -boot order=dc -hda .\freebsd.img -nic tap,ifname=TAP -accel hax

// Load vmm within the guest
# kldload vmm
vmx_modinit: processor does not support VMX operation
module_register_init: MOD_LOAD (vmm, 0xffffffff82c04200, 0) error 6
driver bug: Unable to set devclass (class: fdc devname: (unknown))

Expected Behavior

Working bhyve within FreeBSD Guest.

Reproducibility

100%