Using a 2016 macbook pro and running VirtualBox 6.1.40 r154048, I've noticed that nested virtualisation is not "working." When I run a linux guest os (centos 7) and excute "grep vmx /proc/cpuinfo" I get no results. Why not? Do I need to enable things in Monterey? I've attached the log VM log file.
Kind regards, Edgar Matzinger.
VT-X/AMD-V grayed out
-
- Posts: 2
- Joined: 1. Dec 2022, 17:24
VT-X/AMD-V grayed out
- Attachments
-
- ghdl-2022-12-01-16-21-31.log
- (82.14 KiB) Downloaded 19 times
-
- Site Moderator
- Posts: 20965
- Joined: 30. Dec 2009, 20:14
- Primary OS: MS Windows 10
- VBox Version: PUEL
- Guest OSses: Windows, Linux
Re: VT-X/AMD-V grayed out
Your Intel processor is missing an important feature for good nested virtualization:
Perhaps the feature your command tests does not pass through.
The other three may let a nested VM run, but not as well. Additionally, not all features get passed through completely: for example, Windows Virtualbox can pass VT-x into the VM for a Windows OS to run nested Virtualbox. But the first Windows VM cannot run its Hyper-V, because SLAT cannot pass through yet.Forum guru fth0's nested VM feature list wrote:00:00:00.127135 VMX - Virtual-Machine Extensions = 0 (1)
00:00:00.127147 Ept - Extended Page Tables = 0 (1)
00:00:00.127153 UnrestrictedGuest - Unrestricted guest = 0 (1)
00:00:00.127155 VmcsShadowing - VMCS shadowing = 0 (0)
Perhaps the feature your command tests does not pass through.
-
- Posts: 2
- Joined: 1. Dec 2022, 17:24
Re: VT-X/AMD-V grayed out
Hello Scott,
thanks for the information. It seems that the CPU in my macbook pro doesn't support vmcs shadowing. Ah well, too bad.
Edgar.
thanks for the information. It seems that the CPU in my macbook pro doesn't support vmcs shadowing. Ah well, too bad.
Edgar.