Re: [Qemu-devel] [PATCH v2] Add virt-v3 machine that uses GIC-500

[Peter Maydell <peter.maydell@linaro.org>]

On 12 May 2015 at 10:20, Daniel P. Berrange <berrange@redhat.com> wrote:
> On Fri, May 08, 2015 at 04:09:01PM +0300, Pavel Fedin wrote:
>>  static void machvirt_machine_init(void)
>>  {
>>      type_register_static(&machvirt_info);
>> +    type_register_static(&machvirtv3_info);
>>  }
>
> If we're going to start adding new machine types for aarch64 with
> version numbers

We are not. Support for GICv2 vs v3 should be dealt with
by suitable machine properties (and by figuring out how
we handle probing for which of the two the host kernel
can provide us).

>, then I think we should we be using a versioning
> scheme that matches what we do on x86. ie, define versioned
> machine types based on the QEMU release numbers

And we're not doing that until we absolutely have to, ie we
have somebody demanding cross-version migration support and
willing to back it up with the necessary battery of testing.
That day will come, but I don't think we're ready for it yet.

thanks
-- PMM