[PATCH RFC 00/17] arm64 kernel text replication

[Lameter, Christopher]

On Fri, 23 Jun 2023, Marc Zyngier wrote:

>> That sounds great, but my initial question would be whether, with such a
>> setup, one could then run VMs under such a kernel without hardware that
>> supports nested virtualisation? I suspect the answer would be no.
>
> The answer is yes. All you need to do is to switch between the host
> and guest stage-2s in the hypervisor, which is what KVM running in
> protected mode does.

Well I think his point was that there are machines running without a 
hypervisor and kernel replication needs to work on that. We certainly 
benefit a lot from kernel replication and our customers may elect to run 
ARM64 kernels without hypervisors on bare metal.