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-rw-r--r--UefiCpuPkg/Library/MpInitLib/MpLib.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.h b/UefiCpuPkg/Library/MpInitLib/MpLib.h
index 80ea0b4e09..72a35ef7be 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.h
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.h
@@ -35,6 +35,8 @@
#include <Library/MtrrLib.h>
#include <Library/HobLib.h>
+#define WAKEUP_AP_SIGNAL SIGNATURE_32 ('S', 'T', 'A', 'P')
+
#define CPU_INIT_MP_LIB_HOB_GUID \
{ \
0x58eb6a19, 0x3699, 0x4c68, { 0xa8, 0x36, 0xda, 0xcd, 0x8e, 0xdc, 0xad, 0x4a } \