ESXI 6.7 GPU PassThrough and "Expose hardware assisted virtualization to the guest OS" not working.

Discussion in 'VMware, VirtualBox, Citrix' started by Kristian, May 22, 2018.

  1. Kristian

    Kristian Active Member

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    I am evaluating ESXI 6.7.

    When activating "expose hardware assisted virtualization to the guest OS" (hope I am translating correct) (CPU Options, one line above IOMMU)

    it is possible to additionaly add a PassThrough GPU to my Windows 10 VM guest,

    but the VM is not starting, showing error

    "It is not possible to pass through devices, while nested virtualization is active".

    Is this "normal" behaviour?
    Or am I doing something wrong here?

    Regards
     
    #1
    Last edited: May 23, 2018
  2. whitey

    whitey Moderator

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    You can ONLY pass thru vt-D devices off of phys HW to BASE ESXi, not nested hypervisors if that is what you are thinking and I am interpreting this request as.
     
    #2
  3. Kristian

    Kristian Active Member

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    [​IMG]

    Thanks for the reply @whitey . Again you come to my rescue.
    I am not shure if we understood each other correctly.
    So I try to explain again.

    I have a Baremetal machine running a super micro x 10SLH with a Xeon E3 1241 V3.
    I am running ESXI 6.7 in eval mode.
    On top there is a Windows 10 vm
    This machine runs an application called Bluestacks (Android Emu)
    When I start Bluestacks the performance is horrible and in settings I can only assign one core.

    If I enable Hardware virtualization (see picture above) I can assign all 4 cores, but I can no longer pass through a video card (well I can select pass through, but the vm is no longer starting up, displaying an instant error message)

    what is another performance killer...

    Have I understood you correctly: This is the normal behavior?
     
    #3
  4. Rand__

    Rand__ Well-Known Member

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    From the error message you get I'd say so.
    If you activate assisted virtualization you can't use pass through
     
    #4
  5. marv

    marv Member

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    Hi @Kristian, this works fine for me on X9SRL + ESXi 6.5 u1 (March 2018 patch). I can run Windows 10 on Windows 10 on ESXi, but now I fear to upgrade to 6.7 :)

    upload_2018-5-30_17-50-0.png
     
    #5
    Last edited: May 30, 2018
  6. Kristian

    Kristian Active Member

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    @marv : well... that is strange... so isn't the possibility higher that I am doing something wrong?
    I was already believing that it is not possible, without understanding why it would not be possible.

    Perhaps someone else can chime in...
    Otherwise: I will try 6.5 U1 and post the results.
    Unfortunately this would have to wait until July....
     
    #6
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