Re: [RFC] KVM: x86: Support KVM VMs sharing SEV context

[Paolo Bonzini]

On 25/02/21 18:53, James Bottomley wrote:
> https://lore.kernel.org/qemu-devel/8b824c44-6a51-c3a7-6596-921dc47fea39@xxxxxxxxxxxxx/
>
> It sounds like this mechanism can be used to boot a vCPU through a
> mirror VM after the fact, which is very compatible with the above whose
> mechanism is  simply to steal a VCPU to hold in reset until it's
> activated.

Yes, and it's much cleaner because, for example, the extra vCPU need not 
participate in the ACPI hotplug stuff and can even use a simplified run 
loop.

Paolo