From c229fca09ebc3ed300845e5346d59e196461c498 Mon Sep 17 00:00:00 2001
From: Ceping Sun <cepingx.sun@intel.com>
Date: Tue, 2 Jan 2024 03:31:20 -0500
Subject: [PATCH] UefiCpuPkg/MpInitLibUp: Update the ProcessorNumber

Update the ProcessorNumber to avoid the assert when
creating MpInformation2 HOB.

Signed-off-by: Ceping Sun <cepingx.sun@intel.com>
reviewed-by: Min Xu <min.m.xu@intel.com>
tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
 UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c b/UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c
index 86f9fbf9036..1b6e1962a21 100644
--- 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;
   }