kvm-hint-dedicated requires host CPU passthrough?

[Paolo Bonzini]

On 20/05/20 19:13, Stefan Hajnoczi wrote:
> Hi,
> libvirt refuses to set KVM_HINTS_DEDICATED when the CPU model is not
> host-passthrough.
> 
> Is there a reason for this limitation?
> 
> My understanding is that KVM_HINTS_DEDICATED means the vCPU is pinned to
> a host CPU that is not shared with other tasks. Any KVM vCPU should be
> able to support this feature, regardless of whether host-passthrough is
> used or not.

Perhaps it's because KVM_HINTS_DEDICATED enables mwait passthrough, and
the details of mwait vary per CPU model?

Paolo

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