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Support for MCBP/Virtualization in combination with chained IBs is formal released on firmware feature version #46. So enable it according to firmware feature version, otherwise, world switch will hang. Signed-off-by: Trigger Huang <trigger.huang@amd.com> Reviewed-by: Monk Liu <monk.liu@amd.com> Reviewed-by: Xiangliang Yu <Xiangliang.Yu@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>