Re: [Qemu-devel] [Help] Windows2012 as Guest 64+cores on KVM Halts

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On Sat, 2017-02-11 at 10:39 -0500, Paolo Bonzini wrote:
> > 
> > 
> > > 
> > > On 10/02/2017 10:31, Gonglei (Arei) wrote:
> > > > 
> > > > But We tested the same cases on Xen platform and VMware, and
> > > > the guest booted successfully.
> > > 
> > > Were these two also tested with enlightenments enabled?  TCG
> > > surely isn't.
> > 
> > About TCG, I just remove ' accel=kvm,' and 'hy_releaxed' from the
> > below QEMU
> > Command line, I thought the hyper-V enabled then. Sorry about that.
> > 
> > But for Xen, we set 'viridian=1' which be thought the Hyper-V is
> > enabled.
> > 
> > For VMWare we also enabled the Hyper-V enlightenments.
If I'm not mistaken, even Hyper-V server doesn't allow specify more
than 64 vCPUs for Generation 1 VMs.
In any case, if you are only interested in hv_relaxed, you can drop it
off for WS2012 as long as you have cpu hypervisor flag
(CPUID.1:ECX [bit 31]=1) turned on.

Best regards,
Vadim.
 
> 
> Ok, thanks for the clarifications!
> 
> Paolo



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