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[Xen-users] Is Xen really a Type 1 Hypervisor?

  • To: xen-users@xxxxxxxxxxxxx
  • From: eva <evammg@xxxxxxxxx>
  • Date: Mon, 16 Apr 2012 11:57:50 +0200
  • Delivery-date: Mon, 16 Apr 2012 09:59:27 +0000
  • List-id: Xen user discussion <xen-users.lists.xen.org>


I got into a debate about if xen is really a type 1 hypervisor. A friend said that Xen/KVM/Intel are not really type 1 hypervisor, that is, the "real" type 1 hypervisor is the one running with Sparc. (?)

How to know? Because if you reboot the Host, vm's keep running, that means, it's type 1. (?)

-- At this point, I am confused. Is he talking about HVM? Is he mixing HVM with type 1?

What I know it's what wikipedia and other xen related documents say about type 1, that is, the hypervisor is at the lowest level, next to the hardware, and controlled at an upper level by dom0.

He also says that there are not many differences between type 1 and type 2 in practice, when talking about the xen and kvm model as wikipedia describes it.

What do you think? Is he mistaken?


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