From 7f72c2829fa29d2b4451c9a60e904df4c6a5df6c Mon Sep 17 00:00:00 2001
From: "devel@edk2.groups.io" <devel@edk2.groups.io>
Date: Tue, 23 Jan 2024 03:36:49 -0800
Subject: MdePkg/Library/BaseCpuLibNull: Add StandardSignatureIsAuthenticAMD()

CpuLib.h exposes StandardSignatureIsAuthenticAMD() API and we require
stub function in its BaseCpuLibNull library instance to avoid potential
link issue.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Signed-off-by: Qing Huang <qing.huang@intel.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
---
 MdePkg/Library/BaseCpuLibNull/BaseCpuLibNull.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/MdePkg/Library/BaseCpuLibNull/BaseCpuLibNull.c b/MdePkg/Library/BaseCpuLibNull/BaseCpuLibNull.c
index 3ba7a35096..3542cf6921 100644
--- a/MdePkg/Library/BaseCpuLibNull/BaseCpuLibNull.c
+++ b/MdePkg/Library/BaseCpuLibNull/BaseCpuLibNull.c
@@ -35,3 +35,18 @@ CpuFlushTlb (
   )
 {
 }
+
+/**
+  Determine if the standard CPU signature is "AuthenticAMD".
+
+  @retval TRUE  The CPU signature matches.
+  @retval FALSE The CPU signature does not match.
+**/
+BOOLEAN
+EFIAPI
+StandardSignatureIsAuthenticAMD (
+  VOID
+  )
+{
+  return FALSE;
+}
-- 
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