UefiCpuPkg/MpInitLibUp: Update the ProcessorNumber

Update the ProcessorNumber to avoid the assert when creating MpInformation2 HOB. Signed-off-by: Ceping Sun <[email protected]>
tianocore · Jan 5, 2024 · 5e8660b · 5e8660b
1 parent 9a4bda6
commit 5e8660b
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c b/UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c
@@ -104,7 +104,8 @@ MpInitLibGetProcessorInfo (
     return EFI_INVALID_PARAMETER;
   }
 
-  if (ProcessorNumber != 0) {
+  // Lower 24 bits contains the actual processor number.
+  if ((ProcessorNumber &= BIT24 - 1) != 0 ) {
     return EFI_NOT_FOUND;
   }