[libvirt] [PATCH v2 0/3] Add support for gic-version machine option

Martin Kletzander mkletzan at redhat.com
Thu Oct 1 09:26:51 UTC 2015

On Thu, Oct 01, 2015 at 10:00:13AM +0300, Pavel Fedin wrote:
> Hello!
>> Can you explain what this setting actually does?
> Of course. It allows to choose GIC version used by ARM 'virt' machine. By default it's 2, but you
>can now set it to 3.
> Actually, initially i proposed another machine type, like 'virt-v3', IMHO this would be more
>logical because this is kind of different architecture. But Peter Maydell disagreed and insisted on
>option. So we have an option.

I think Cole wanted to know more like how it can be useful for end
users.  Since I see GIC as something similar to APIC, I'm guessing the
usefulness won't be directly visible, but should help.  About what
exactly it does or what are the differences between, that I cannot
help with, unfortunately.

>> When would apps like virt-manager want to enable it?
> When choosing 'virt' machine type for ARM architecture.

Unconditionally?  Doesn't that pose a problem, e.g. for requesting
version that is not supported or breaking something that expects lower

>Kind regards,
>Pavel Fedin
>Expert Engineer
>Samsung Electronics Research center Russia
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