UefiCpuPkg/MpInitLib: Set new AP to idle state after switching BSP

We need to set new AP to idle state if it is expected to be waken up by new BSP
later.

Cc: Feng Tian <feng.tian@intel.com>
Cc: Kinney Michael D <michael.d.kinney@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@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>

diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c
index 77d855a29a96eaf1212dd0b77dc99aca4c925501..78d18b616eb5e954feae419787adfd9530da6372 100644 (file)
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
@@ -1608,6 +1608,8 @@ SwitchBSPWorker (
   //\r
   if (!EnableOldBSP) {\r
     SetApState (&CpuMpData->CpuData[CallerNumber], CpuStateDisabled);\r
+  } else {\r
+    SetApState (&CpuMpData->CpuData[CallerNumber], CpuStateIdle);\r
   }\r
   //\r
   // Save new BSP number\r