[PATCH v5 09/22] KVM: arm64: vgic-its: Introduce migration ABI infrastructure

On Fri, Apr 14, 2017 at 3:45 PM, Eric Auger [off-list ref] wrote:

We plan to support different migration ABIs, ie. characterizing
the ITS table layout format in guest RAM. Typically a new ABI will
be needed if vLPIs get supported for nested use case.

So let's introduce an array of supported ABIs (at the moment a single
ABI is supported though). The following characteristics are foreseen
to vary with the ABI: size of table entries, save/restore operation.

By default the MAX_ABI_REV is applied on its creation. In subsequent
patches we will introduce a way for the userspace to change the ABI
in use.

The entry sizes now are set according to the ABI version and not
hardcoded anymore.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

Tested-by: Prakash, Brahmajyosyula <redacted>