59a119f0fc
After X2APIC mode is enabled, APs need to be set tp IDLE state, otherwise APs cannot be waken up by MP PPI services. https://bugzilla.tianocore.org/show_bug.cgi?id=505 Cc: Feng Tian <feng.tian@intel.com> Cc: Michael Kinney <michael.d.kinney@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jeff Fan <jeff.fan@intel.com> Reviewed-by: Feng Tian <feng.tian@intel.com>