diff --git a/OvmfPkg/Include/WorkArea.h b/OvmfPkg/Include/WorkArea.h
index b67edd14e7..bf56fc4a6f 100644
--- a/OvmfPkg/Include/WorkArea.h
+++ b/OvmfPkg/Include/WorkArea.h
@@ -10,14 +10,7 @@
 #ifndef __OVMF_WORK_AREA_H__
 #define __OVMF_WORK_AREA_H__
 
-//
-// Guest type for the work area
-//
-typedef enum {
-  GUEST_TYPE_NON_ENCRYPTED,
-  GUEST_TYPE_AMD_SEV,
-  GUEST_TYPE_INTEL_TDX,
-} GUEST_TYPE;
+#include <ConfidentialComputingGuestAttr.h>
 
 //
 // Confidential computing work area header definition. Any change
diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/PeiMemEncryptSevLibInternal.c b/OvmfPkg/Library/BaseMemEncryptSevLib/PeiMemEncryptSevLibInternal.c
index 3f8f91a5da..41d1246a5b 100644
--- a/OvmfPkg/Library/BaseMemEncryptSevLib/PeiMemEncryptSevLibInternal.c
+++ b/OvmfPkg/Library/BaseMemEncryptSevLib/PeiMemEncryptSevLibInternal.c
@@ -36,7 +36,7 @@ GetSevEsWorkArea (
   //
   // If its not SEV guest then SevEsWorkArea is not valid.
   //
-  if ((WorkArea == NULL) || (WorkArea->Header.GuestType != GUEST_TYPE_AMD_SEV)) {
+  if ((WorkArea == NULL) || (WorkArea->Header.GuestType != CcGuestTypeAmdSev)) {
     return NULL;
   }
 
diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/SecMemEncryptSevLibInternal.c b/OvmfPkg/Library/BaseMemEncryptSevLib/SecMemEncryptSevLibInternal.c
index 80aceba01b..27148c7e33 100644
--- a/OvmfPkg/Library/BaseMemEncryptSevLib/SecMemEncryptSevLibInternal.c
+++ b/OvmfPkg/Library/BaseMemEncryptSevLib/SecMemEncryptSevLibInternal.c
@@ -36,7 +36,7 @@ GetSevEsWorkArea (
   //
   // If its not SEV guest then SevEsWorkArea is not valid.
   //
-  if ((WorkArea == NULL) || (WorkArea->Header.GuestType != GUEST_TYPE_AMD_SEV)) {
+  if ((WorkArea == NULL) || (WorkArea->Header.GuestType != CcGuestTypeAmdSev)) {
     return NULL;
   }
 
diff --git a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgPei.c b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgPei.c
index b8230613dc..7ab7027af1 100644
--- a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgPei.c
+++ b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgPei.c
@@ -35,7 +35,7 @@ QemuFwCfgIsTdxGuest (
   CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER  *CcWorkAreaHeader;
 
   CcWorkAreaHeader = (CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER *)FixedPcdGet32 (PcdOvmfWorkAreaBase);
-  return (CcWorkAreaHeader != NULL && CcWorkAreaHeader->GuestType == GUEST_TYPE_INTEL_TDX);
+  return (CcWorkAreaHeader != NULL && CcWorkAreaHeader->GuestType == CcGuestTypeIntelTdx);
 }
 
 /**
diff --git a/OvmfPkg/Sec/AmdSev.c b/OvmfPkg/Sec/AmdSev.c
index d8fd35650d..6af38aaf46 100644
--- a/OvmfPkg/Sec/AmdSev.c
+++ b/OvmfPkg/Sec/AmdSev.c
@@ -251,7 +251,7 @@ IsSevGuest (
 
   WorkArea = (OVMF_WORK_AREA *)FixedPcdGet32 (PcdOvmfWorkAreaBase);
 
-  return ((WorkArea != NULL) && (WorkArea->Header.GuestType == GUEST_TYPE_AMD_SEV));
+  return ((WorkArea != NULL) && (WorkArea->Header.GuestType == CcGuestTypeAmdSev));
 }
 
 /**