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A platform may have a GIC compatible with previous version of the device. This is allow to virtualize an unmodified OS on new hardware if the GIC is compatible with older version. When a guest is created, the vGIC will emulate same version as the hardware. Although, the user can specify in the configuration file the preferred version (currently only GICv2 and GICv3 are supported). Signed-off-by: Julien Grall <julien.grall@citrix.com> Cc: Ian Jackson <ian.jackson@eu.citrix.com> Cc: Wei Liu <wei.liu2@citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com>