Re: [PATCH 0/9] ppc: nested KVM HV for spapr virtual hypervisor

[Fabiano Rosas <farosas@linux.ibm.com>]

Daniel Henrique Barboza <danielhb413@gmail.com> writes:

> On 2/15/22 15:33, Cédric Le Goater wrote:
>> On 2/15/22 04:16, Nicholas Piggin wrote:
>>> Here is the rollup of patches in much better shape since the RFC.
>>> I include the 2 first ones unchanged from independent submission
>>> just to be clear that this series requires them.
>>>
>>> Thanks Cedric and Fabiano for wading through my poor quality RFC
>>> code, very good changes suggested and I hope I got most of them
>>> and this one is easier to follow.
>> 
>> This is in good shape and functional. I will try to propose a small
>> buildroot environment for it, so that we don't have to start a full
>> distro to test.
>> 
>> I would like to talk about the naming. KVM-HV is I think "reserved"
>> to the PowerNV platform (baremetal). We also have KVM-PR which runs
>> KVM guests on various platforms, including pseries.
>> 
>> How can we call this yet another KVM PPC implementation ?
>
> Do we need a new name? I believe Nick uses the stock kvm_hv kernel module in this
> implementation.
>
> If we want a name to differ between the different KVM-HV usages, well, I'd suggest
> KVM-EHV (Emulated HV) or KVM-NHV (Nested HV) or KVM-VHV (Virtual HV) or anything
> that suggests that this is a different flavor of using KVM-HV.

I'd say it's imperative to have a clear indication that this is
TCG. Otherwise we'll have people trying to weird stuff with it and
complaining that Nested KVM is bugged.

Some ideas:

Emulated Nested KVM
Emulated Nested HV
Nested TCG

The first one is perhaps more accurate, but we'd end up having "kvm"
mentioned in TCG code and that is super confusing.