[libvirt] [PATCH 4/4] qemu: default to kvm32/kvm64 when KVM is enabled
Paolo Bonzini
pbonzini at redhat.com
Mon Jan 23 16:23:32 UTC 2012
On 01/23/2012 05:03 PM, Daniel P. Berrange wrote:
>>> > > The qemu32/qemu64 models are weird in that the exact combination of
>>> > > CPUID flags does not match any actual processor. kvm32 and kvm64 are
>>> > > a better match when not using TCG. Use them when -cpu is only needed
>>> > > to hardcode a 32-bit guest arch or for kvmclock.
>> >
>> > I don't think we can do this as it means the guest CPU may change unexpectedly
>> > for existing domains. A 32b domain started on current libvirt would see qemu32,
>> > while the same domain started after this patch would see kvm32.
> Also, IIUC, kvm32 is a fairly newly introduced CPU type for KVM - ie most
> deployments of KVM won't support it.
Ok, I'll redo this patch with just kvm64. As the wrong subject in 0/3
show, it was an afterthought.
As soon as I get the review of 3/4, I'll see whether I need to resubmit
the whole series or just this patch.
Paolo
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