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Re: [Qemu-devel] drop -enable-nesting
From: |
Nadav Har'El |
Subject: |
Re: [Qemu-devel] drop -enable-nesting |
Date: |
Mon, 30 May 2011 18:16:23 +0300 |
User-agent: |
Mutt/1.4.2.2i |
On Mon, May 30, 2011, Jan Kiszka wrote about "Re: drop -enable-nesting":
> > "-enable-nesting" could remain as a synonym for enabling either VMX or SVM
> > in the guest, depending on what was available in the host (because KVM now
> > supports both nested SVM and nested VMX, but not SVM-on-VMX or vice versa).
>
> Why? Once nesting is stable (I think SVM already is), there is no reason
> for an explicit enable. And you can always mask it out via -cpu.
As far as I understand (and this was previously discussed on the QEMU mailing
list), the default emulated CPU does not include the "vmx" capability, and you
need to enable it with something like "-cpu qemu64,+vmx" (or "-cpu host").
I am not sure if it does enable the "svm" capability. If it does, it isn't
useful when KVM is enabled and the underlying host has VMX, not SVM.
Nadav.
--
Nadav Har'El | Monday, May 30 2011, 27 Iyyar 5771
address@hidden |-----------------------------------------
Phone +972-523-790466, ICQ 13349191 |Why do we drive on a parkway and park on
http://nadav.harel.org.il |a driveway?
- Re: [Qemu-devel] drop -enable-nesting, (continued)
- Re: [Qemu-devel] drop -enable-nesting, Roedel, Joerg, 2011/05/30
- Re: [Qemu-devel] drop -enable-nesting, Jan Kiszka, 2011/05/30
- Re: [Qemu-devel] drop -enable-nesting, Avi Kivity, 2011/05/30
- Re: [Qemu-devel] drop -enable-nesting, Jan Kiszka, 2011/05/30
- Re: [Qemu-devel] drop -enable-nesting, Jan Kiszka, 2011/05/30
- Re: [Qemu-devel] drop -enable-nesting, Daniel P. Berrange, 2011/05/31
- Re: [Qemu-devel] drop -enable-nesting, Avi Kivity, 2011/05/31
- Re: [Qemu-devel] drop -enable-nesting, Roedel, Joerg, 2011/05/31
- Re: [Qemu-devel] drop -enable-nesting, Paolo Bonzini, 2011/05/31
- Re: [Qemu-devel] drop -enable-nesting, Avi Kivity, 2011/05/31
- Re: [Qemu-devel] drop -enable-nesting,
Nadav Har'El <=
- Re: [Qemu-devel] drop -enable-nesting, Jan Kiszka, 2011/05/30