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SubjectRe: [RFC] KVM: x86: Support KVM VMs sharing SEV context
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On 25/02/21 18:53, James Bottomley wrote:
>
> https://lore.kernel.org/qemu-devel/8b824c44-6a51-c3a7-6596-921dc47fea39@linux.ibm.com/
>
> 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

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