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From: Pavel Fedin <p.fedin@samsung.com>
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Date: Tue, 02 Feb 2016 18:36:22 +0300
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Subject: Re: [Qemu-devel] [libvirt]   ARM KVM GICv3 Support
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To: 'Andrea Bolognani' <abologna@redhat.com>, 'Andrew Jones' <drjones@redhat.com>, "'Daniel P. Berrange'" <berrange@redhat.com>
Cc: 'Peter Maydell' <peter.maydell@linaro.org>, 'Eric Auger' <eric.auger@linaro.org>, 'Libvirt' <libvir-list@redhat.com>, 'Andre Przywara' <andre.przywara@arm.com>, qemu-devel@nongnu.org, 'Marc Zyngier' <marc.zyngier@arm.com>, 'Christoffer Dall' <christoffer.dall@linaro.org>

 Hello!

> Shouldn't the default be "host", to mean "whatever the host supports",
> rather than a specific version based either on host or QEMU probing?

 No, because:
1) Older qemu, which does not support this option, uses v2.
2) It also depends on whether KVM or TCG is used. Currently we can have =
v3 only with KVM, but when software emulation is implemented, it can be =
used in all cases, regardless of host KVM restrictions.

> That should work for every QEMU version, right?

 Wrong. See (1) above.

Kind regards,
Pavel Fedin
Senior Engineer
Samsung Electronics Research center Russia